TY - JOUR
A1 - Scholz, Robert
A1 - Lindner, Steven
A1 - Loncaric, Ivor
A1 - Tremblay, Jean Christophe
A1 - Juaristi, J.
A1 - Alducin, Maite
A1 - Saalfrank, Peter
T1 - Vibrational response and motion of carbon monoxide on Cu(100) driven by femtosecond laser pulses: Molecular dynamics with electronic friction
JF - Physical review : B, Condensed matter and materials physics
N2 - Carbon monoxide on copper surfaces continues to be a fascinating, rich microlab for many questions evolving in surface science. Recently, hot-electron mediated, femtosecond-laser pulse induced dynamics of CO molecules on Cu(100) were the focus of experiments [Inoue et al., Phys. Rev. Lett. 117, 186101 (2016)] and theory [Novko et al., Phys. Rev. Lett. 122, 016806 (2019)], unraveling details of the vibrational nonequilibrium dynamics on ultrashort (subpicoseconds) timescales. In the present work, full-dimensional time-resolved hot-electron driven dynamics are studied by molecular dynamics with electronic friction (MDEF). Dissipation is included by a friction term in a Langevin equation which describes the coupling of molecular degrees of freedom to electron-hole pairs in the copper surface, calculated from gradient-corrected density functional theory (DFT) via a local density friction approximation (LDFA). Relaxation due to surface phonons is included by a generalized Langevin oscillator model. The hot-electron induced excitation is described via a time-dependent electronic temperature, the latter derived from an improved two-temperature model. Our parameter-free simulations on a precomputed potential energy surface allow for excellent statistics, and the observed trends are confirmed by on-the-fly ab initio molecular dynamics with electronic friction (AIMDEF) calculations. By computing time-resolved frequency maps for selected molecular vibrations, instantaneous frequencies, probability distributions, and correlation functions, we gain microscopic insight into hot-electron driven dynamics and we can relate the time evolution of vibrational internal CO stretch-mode frequencies to measured data, notably an observed redshift. Quantitatively, the latter is found to be larger in MDEF than in experiment and possible reasons are discussed for this observation. In our model, in addition we observe the excitation and time evolution of large-amplitude low-frequency modes, lateral CO surface diffusion, and molecular desorption. Effects of surface atom motion and of the laser fluence are also discussed.
Y1 - 2019
U6 - https://doi.org/10.1103/PhysRevB.100.245431
SN - 2469-9950
SN - 2469-9969
VL - 100
IS - 24
PB - American Physical Society
CY - College Park
ER -
TY - JOUR
A1 - Melani, Giacomo
A1 - Nagata, Yuki
A1 - Campen, Richard Kramer
A1 - Saalfrank, Peter
T1 - Vibrational spectra of dissociatively adsorbed D2O on Al-terminated alpha-Al2O3(0001) surfaces from ab initio molecular dynamics
JF - The journal of chemical physics : bridges a gap between journals of physics and journals of chemistr
N2 - Water can adsorb molecularly or dissociatively onto different sites of metal oxide surfaces. These adsorption sites can be disentangled using surface-sensitive vibrational spectroscopy. Here, we model Vibrational Sum Frequency (VSF) spectra for various forms of dissociated, deuterated water on a reconstructed, Al-terminated α-Al2O3(0001) surface at submonolayer coverages (the so-called 1-2, 1-4, and 1-4′ modes). Using an efficient scheme based on velocity-velocity autocorrelation functions, we go beyond previous normal mode analyses by including anharmonicity, mode coupling, and thermal surface motion in the framework of ab initio molecular dynamics. In this way, we calculate vibrational density of states curves, infrared, and VSF spectra. Comparing computed VSF spectra with measured ones, we find that relative frequencies of resonances are in quite good agreement and linewidths are reasonably well represented, while VSF intensities coincide not well. We argue that intensities are sensitively affected by local interactions and thermal fluctuations, even at such low coverage, while absolute peak positions strongly depend on the choice of the electronic structure method and on the appropriate inclusion of anharmonicity.
Y1 - 2019
U6 - https://doi.org/10.1063/1.5099895
SN - 0021-9606
SN - 1089-7690
VL - 150
IS - 24
PB - American Institute of Physics
CY - Melville
ER -
TY - JOUR
A1 - Melani, Giacomo
A1 - Nagata, Yuki
A1 - Wirth, Jonas
A1 - Saalfrank, Peter
T1 - Vibrational spectroscopy of hydroxylated alpha-Al2O3(0001) surfaces with and without water
BT - an ab initio molecular dynamics study
JF - The journal of chemical physics : bridges a gap between journals of physics and journals of chemistr
N2 - Using gradient- and dispersion-corrected density functional theory in connection with ab initio molecular dynamics and efficient, parametrized Velocity-Velocity Autocorrelation Function (VVAF) methodology, we study the vibrational spectra (Vibrational Sum Frequency, VSF, and infrared, IR) of hydroxylated alpha-Al2O3(0001) surfaces with and without additional water. Specifically, by considering a naked hydroxylated surface and the same surface with a particularly stable, "ice-like" hexagonal water later allows us to identify and disentangle main spectroscopic bands of OH bonds, their orientation and dynamics, and the role of water adsorption. In particular, we assign spectroscopic signals around 3700 cm(-1) as being dominated by perpendicularly oriented non-hydrogen bonded aluminol groups, with and without additional water. Furthermore, the thin water layer gives spectroscopic signals which are already comparable to previous theoretical and experimental findings for the solid/(bulk) liquid interface, showing that water molecules closest to the surface play a decisive role in the vibrational response of these systems. From a methodological point of view, the effects of temperature, anharmonicity, hydrogen-bonding, and structural dynamics are taken into account and analyzed, allowing us to compare the calculated IR and VSF spectra with the ones based on normal mode analysis and vibrational density of states. The VVAF approach employed in this work appears to be a computationally accurate yet feasible method to address the vibrational fingerprints and dynamical properties of water/metal oxide interfaces. Published by AIP Publishing.
Y1 - 2018
U6 - https://doi.org/10.1063/1.5023347
SN - 0021-9606
SN - 1089-7690
VL - 149
IS - 1
PB - American Institute of Physics
CY - Melville
ER -
TY - JOUR
A1 - Xiong, Tao
A1 - Saalfrank, Peter
T1 - Vibrationally Broadened Optical Spectra of Selected Radicals and Cations Derived from Adamantane: A Time-Dependent Correlation Function Approach
JF - The journal of physical chemistry : A, Molecules, spectroscopy, kinetics, environment & general theory
N2 - Diamondoids are hydrogen-saturated molecular motifs cut out of diamond, forming a class of materials with tunable optoelectronic properties. In this work, we extend previous work on neutral, closed-shell diamondoids by computing with hybrid density functional theory and time-dependent correlation functions vibrationally broadened absorption spectra of cations and radicals derived from the simplest diamondoid, adamantane, namely, the neutral 1- and 2-adamantyl radicals (C10H15), the 1- and 2-adamantyl cations (C10H15+), and the adamantane radical cation (C10H16+). For selected cases, we also report vibrationally broadened emission, photoelectron, and resonance Raman spectra. Furthermore, the effect of the damping factor on the vibrational fine-structure is studied. The following trends are found: (1) Low-energy absorptions of the adamantyl radicals and cations, and of the adamantane cation, are all strongly red-shifted with respect to adamantane; (2) also, emission spectra are strongly red-shifted, whereas photoelectron spectra are less affected for the cases studied; (3) vibrational fine-structures are reduced compared to those of adamantane; (4) the spectroscopic signals of 1- and 2-adamantyl species are significantly different from each other; and (5) reducing the damping factor has only a limited effect on the vibrational fine-structure in most cases. This suggests that removing hydrogen atoms and/or electrons from adamantane leads to new optoelectronic properties, which should be detectable by vibronic spectroscopy.
Y1 - 2019
U6 - https://doi.org/10.1021/acs.jpca.9b03305
SN - 1089-5639
SN - 1520-5215
VL - 123
IS - 41
SP - 8871
EP - 8880
PB - American Chemical Society
CY - Washington
ER -
TY - JOUR
A1 - Xiong, Tao
A1 - Wlodarczyk, Radoslaw
A1 - Saalfrank, Peter
T1 - Vibrationally resolved absorption and fluorescence spectra of perylene and N-substituted derivatives from autocorrelation function approaches
JF - Chemical physics : a journal devoted to experimental and theoretical research involving problems of both a chemical and physical nature
N2 - Vibrationally resolved absorption and emission (fluorescence) spectra of perylene and its N-derivatives in gas phase and in solution (acetonitrile) were simulated using a time-dependent approach based on correlation functions determined by density functional theory. By systematically varying the number and position of N atoms, it is shown that the presence of nitrogen heteroatoms has a negligible effect on the molecular structure and geometric distortions upon electronic transitions, while spectral properties change: in particular the number of N atoms is important while their position is less decisive. Thus, the N-substitution can be used to fine-tune the optical properties of perylene-based molecules.
KW - Perylene
KW - Vibronic spectrum
KW - Correlation function
KW - Dimer
KW - Excimer
KW - PCM
Y1 - 2018
U6 - https://doi.org/10.1016/j.chemphys.2018.06.011
SN - 0301-0104
SN - 1873-4421
VL - 515
SP - 728
EP - 736
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Banerjee, Shiladitya
A1 - Saalfrank, Peter
T1 - Vibrationally resolved absorption, emission and resonance Raman spectra of diamondoids : a study based on time- dependent correlation functions
Y1 - 2014
UR - http://pubs.rsc.org/en/content/articlehtml/2014/cp/c3cp53535e
U6 - https://doi.org/10.1039/C3CP53535E
ER -
TY - JOUR
A1 - Banerjee, Shiladitya
A1 - Saalfrank, Peter
T1 - Vibrationally resolved absorption, emission and resonance Raman spectra of diamondoids: a study based on time-dependent correlation functions
JF - Physical chemistry, chemical physics : a journal of European Chemical Societies
Y1 - 2014
U6 - https://doi.org/10.1039/c3cp53535e
SN - 1463-9076
SN - 1463-9084
VL - 16
IS - 1
SP - 144
EP - 158
PB - Royal Society of Chemistry
CY - Cambridge
ER -
TY - JOUR
A1 - Banerjee, Shiladitya
A1 - Stueker, Tony
A1 - Saalfrank, Peter
T1 - Vibrationally resolved optical spectra of modified diamondoids obtained from time-dependent correlation function methods
JF - Physical chemistry, chemical physics : a journal of European Chemical Societies
N2 - Optical properties of modified diamondoids have been studied theoretically using vibrationally resolved electronic absorption, emission and resonance Raman spectra. A time-dependent correlation function approach has been used for electronic two-state models, comprising a ground state (g) and a bright, excited state (e), the latter determined from linear-response, time-dependent density functional theory (TD-DFT). The harmonic and Condon approximations were adopted. In most cases origin shifts, frequency alteration and Duschinsky rotation in excited states were considered. For other cases where no excited state geometry optimization and normal mode analysis were possible or desired, a short-time approximation was used. The optical properties and spectra have been computed for (i) a set of recently synthesized sp(2)/sp(3) hybrid species with CQC double-bond connected saturated diamondoid subunits, (ii) functionalized (mostly by thiol or thione groups) diamondoids and (iii) urotropine and other C-substituted diamondoids. The ultimate goal is to tailor optical and electronic features of diamondoids by electronic blending, functionalization and substitution, based on a molecular-level understanding of the ongoing photophysics.
Y1 - 2015
U6 - https://doi.org/10.1039/c5cp02615f
SN - 1463-9076
SN - 1463-9084
VL - 17
IS - 29
SP - 19656
EP - 19669
PB - Royal Society of Chemistry
CY - Cambridge
ER -
TY - JOUR
A1 - Banerjee, Shiladitya
A1 - Stüker, Tony
A1 - Saalfrank, Peter
T1 - Vibrationally resolved optical spectra of modified diamondoids obtained from time-dependent correlation function methods
JF - Physical chemistry, chemical physics : PCCP ; a journal of European chemical societies
N2 - Optical properties of modified diamondoids have been studied theoretically using vibrationally resolved electronic absorption, emission and resonance Raman spectra. A time-dependent correlation function approach has been used for electronic two-state models, comprising a ground state (g) and a bright, excited state (e), the latter determined from linear-response, time-dependent density functional theory (TD-DFT). The harmonic and Condon approximations were adopted. In most cases origin shifts, frequency alteration and Duschinsky rotation in excited states were considered. For other cases where no excited state geometry optimization and normal mode analysis were possible or desired, a short-time approximation was used. The optical properties and spectra have been computed for (i) a set of recently synthesized sp2/sp3 hybrid species with C[double bond, length as m-dash]C double-bond connected saturated diamondoid subunits, (ii) functionalized (mostly by thiol or thione groups) diamondoids and (iii) urotropine and other C-substituted diamondoids. The ultimate goal is to tailor optical and electronic features of diamondoids by electronic blending, functionalization and substitution, based on a molecular-level understanding of the ongoing photophysics.
Y1 - 2015
U6 - https://doi.org/10.1039/C5CP02615F
SN - 1463-9084
SN - 1463-9076
VL - 17
IS - 29
SP - 19656
EP - 19669
PB - Royal Society of Chemistry
CY - Cambridge
ER -
TY - JOUR
A1 - Xiong, Tao
A1 - Włodarczyk, Radosław Stanisław
A1 - Gallandi, Lukas
A1 - Körzdörfer, Thomas
A1 - Saalfrank, Peter
T1 - Vibrationally resolved photoelectron spectra of lower diamondoids
BT - a time-dependent approach
JF - The journal of chemical physics : bridges a gap between journals of physics and journals of chemistry
N2 - Vibrationally resolved lowest-energy bands of the photoelectron spectra (PES) of adamantane, diamantane, and urotropine were simulated by a time-dependent correlation function approach within the harmonic approximation. Geometries and normal modes for neutral and cationic molecules were obtained from B3LYP hybrid density functional theory (DFT). It is shown that the simulated spectra reproduce the experimentally observed vibrational finestructure (or its absence) quite well. Origins of the finestructure are discussed and related to recurrences of autocorrelation functions and dominant vibrations. Remaining quantitative and qualitative errors of the DFT-derived PES spectra refer to (i) an overall redshift by ∼0.5 eV and (ii) the absence of satellites in the high-energy region of the spectra. The former error is shown to be due to the neglect of many-body corrections to ordinary Kohn-Sham methods, while the latter has been argued to be due to electron-nuclear couplings beyond the Born-Oppenheimer approximation [Gali et al., Nat. Commun. 7, 11327 (2016)].
Y1 - 2018
U6 - https://doi.org/10.1063/1.5012131
SN - 0021-9606
SN - 1089-7690
VL - 148
IS - 4
PB - American Institute of Physics
CY - Melville
ER -
TY - JOUR
A1 - Glerum, Anne
A1 - Brune, Sascha
A1 - Stamps, D. Sarah
A1 - Strecker, Manfred
T1 - Victoria continental microplate dynamics controlled by the lithospheric strength distribution of the East African Rift
JF - Nature Communications
N2 - The Victoria microplate between the Eastern and Western Branches of the East African Rift System is one of the largest continental microplates on Earth. In striking contrast to its neighboring plates, Victoria rotates counterclockwise with respect to Nubia. The underlying cause of this distinctive rotation has remained elusive so far. Using 3D numerical models, we investigate the role of pre-existing lithospheric heterogeneities in continental microplate rotation. We find that Victoria's rotation is primarily controlled by the distribution of rheologically stronger zones that transmit the drag of the major plates to the microplate and of the mechanically weaker mobile belts surrounding Victoria that facilitate rotation. Our models reproduce Victoria's GPS-derived counterclockwise rotation as well as key complexities of the regional tectonic stress field. These results reconcile competing ideas on the opening of the rift system by highlighting differences in orientation of the far-field divergence, local extension, and the minimum horizontal stress. One of the largest continental microplates on Earth is situated in the center of the East African Rift System, and oddly, the Victoria microplate rotates counterclockwise with respect to the neighboring African tectonic plate. Here, the authors' modelling results suggest that Victoria microplate rotation is caused by edge-driven lithospheric processes related to the specific geometry of rheologically weak and strong regions.
Y1 - 2020
U6 - https://doi.org/10.1038/s41467-020-16176-x
SN - 2041-1723
VL - 11
IS - 1
PB - Nature Publishing Group
CY - London
ER -
TY - BOOK
ED - Böhnke, Dietmar
ED - Brusberg-Kiermeier, Stefanie
ED - Drexler, Peter
T1 - Victorian highways, Victorian byways
BT - new approaches to nineteenth century British literature and culture
T3 - Potsdamer Beiträge zur Kultur- und Sozialgeschichte
Y1 - 2010
SN - 978-3-89626-939-3
VL - 8
PB - Trafo
CY - Berlin
ER -
TY - JOUR
A1 - Havemann, Anna
T1 - Victorian Women Artists
BT - their Quest for Independence and Professional Artistic Training
JF - Victorian highways, Victorian byways : new approaches to nineteenth century British literature and culture
Y1 - 2010
SN - 978-3-89626-939-3
SP - 15
EP - 40
PB - Trafo
CY - Berlin
ER -
TY - BOOK
ED - Kazepov, Yuri
ED - Verwiebe, Roland
T1 - Vienna
BT - Still a just city?
T3 - Built environment city studies
N2 - This book explores and debates the urban transformations that have taken place in Vienna over the past 30 years and their consequences in policy fields such as labour and housing, political and social participation and the environment. Historically, European cities have been characterised by a strong association between social cohesion, quality of life, economic ambition and a robust State. Vienna is an excellent example for that. In more recent years, however, cities were pressured to change policy principles and mechanisms in the context of demographic shifts, post-industrial transformations and welfare recalibration which have led to worsened social conditions in many cities. Each chapter in this volume discusses Vienna's responses to these pressures in key policy arenas, looking at outcomes from the context-specific local arrangements. Against a theoretical framework debating the European city as a model of inclusion and social justice, authors explore the local capacity to innovate urban policies and to address new social risks, while paying attention to potential trade-offs.
The book questions and assesses the city's resilience using time series and an institutional analysis of four key dimensions that characterise the European city model within the context of post-industrial transition: redistribution, recognition, representation and sustainability. It offers a multiscalar perspective of urban governance through labour, housing, participatory and environmental policies, bringing together different levels and public policy types.
KW - Built Environment
KW - Environment and Sustainability
KW - Geography
KW - Social Sciences
KW - Urban Studies
Y1 - 2021
SN - 978-0-367-68011-4
SN - 978-1-003133-82-7
SN - 978-0-367-68013-8
U6 - https://doi.org/10.4324/9781003133827
PB - Routledge
CY - London
ER -
TY - CHAP
A1 - Verwiebe, Roland
A1 - Kazepov, Yuri
A1 - Friesenecker, Michael
A1 - Ahn, Byeongsun
T1 - Vienna's resilience
BT - Between urban justice and the challenges ahead
T2 - Vienna: Still a Just City?
N2 - This chapter provides a synthesis of the volume, bringing together the aspects that characterise each of the single policy domains analysed throughout and highlighting their synergic effects on the output. In particular, it addresses the dualisation tendencies between ‘winners’ and ‘losers’ in Vienna’s urban transformation in the changing dimensions of social stratification, on the one hand; and the mechanisms of institutional resilience, on the other hand. Despite the inclusive welfare system, emerging vulnerabilities currently pose new challenges for Vienna’s redistributive capacity in the key policy areas. Existing institutional arrangements and their regulatory capacities are a good starting point to answer the question: is Vienna still a just city?
Y1 - 2021
SN - 978-1-003-13382-7
SN - 978-0-367-68011-4
SN - 978-0-367-68013-8
U6 - https://doi.org/10.4324/9781003133827-14
SP - 146
EP - 158
PB - Routledge
CY - London
ER -
TY - JOUR
A1 - Scheffler, Christiane
A1 - Nguyen, Thi Hong
A1 - Hermanussen, Michael
T1 - Vietnamese migrants are as tall as they want to be
JF - Human biology and public health
N2 - Background: Members of the same social group tent to have the same body height. Migrants tend to adjust in height to their host communities.
Objectives: Social-Economic-Political-Emotional (SEPE) factors influence growth. We hypothesized that Vietnamese young adult migrants in Germany (1) are taller than their parents, (2) are as tall as their German peers, and (3) are as tall as predicted by height expectation at age 13 years.
Sample: The study was conducted in 30 male and 54 female Vietnamese migrants (mean age 26.23 years. SD=4.96) in Germany in 2020.
Methods: Information on age, sex, body height, school and education, job, height and ethnicity of best friend, migration history and cultural identification, parental height and education, and recalled information on their personal height expectations at age 13 years were obtained by questionnaire. The data were analyzed by St. Nicolas House Analysis (SNHA) and multiple regression.
Results: Vietnamese young adults are taller than their parents (females 3.85cm, males 7.44cm), but do not fully attain height of their German peers. The body height is positively associated with the height of best friend (p < 0.001), the height expectation at age 13 year (p < 0.001), and father’s height (p=0.001).
Conclusion: Body height of Vietnamese migrants in Germany reflects competitive growth and strategic growth adjustments. The magnitude of this intergenerational trend supports the concept that human growth depends on SEPE factors.
KW - body height
KW - regulation of growth
KW - migrants
KW - Social-Economic-Political-Emotional (SEPE) factors
Y1 - 2021
U6 - https://doi.org/10.52905/hbph.v2.12
SN - 2748-9957
IS - 2
PB - Universitätsverlag Potsdam
CY - Potsdam
ER -
TY - JOUR
A1 - Kunnus, Kristjan
A1 - Zhang, Wenkai
A1 - Delcey, Mickael G.
A1 - Pinjari, Rahul V.
A1 - Miedema, Piter S.
A1 - Schreck, Simon
A1 - Quevedo, Wilson
A1 - Schröder, Henning
A1 - Föhlisch, Alexander
A1 - Gaffney, Kelly J.
A1 - Lundberg, Marcus
A1 - Odelius, Michael
A1 - Wernet, Philippe
T1 - Viewing the Valence Electronic Structure of Ferric and Ferrous Hexacyanide in Solution from the Fe and Cyanide Perspectives
JF - The journal of physical chemistry : B, Condensed matter, materials, surfaces, interfaces & biophysical chemistry
N2 - The valence-excited states of ferric and ferrous hexacyanide ions in aqueous solution were mapped by resonant inelastic X-ray scattering (RIXS) at the Fe L-2,L-3 and N K edges. Probing of both the central Fe and the ligand N atoms enabled identification of the metal-and ligand-centered excited states, as well as ligand-to-metal and metal-to-ligand charge-transfer excited states. Ab initio calculations utilizing the RASPT2 method were used to simulate the Fe L-2,L-3-edge RIXS spectra and enabled quantification of the covalencies of both occupied and empty orbitals of pi and sigma symmetry. We found that pi back-donation in the ferric complex is smaller than that in the ferrous complex. This is evidenced by the relative amounts of Fe 3d character in the nominally 2 pi CN- molecular orbital of 7% and 9% in ferric and ferrous hexacyanide, respectively. Utilizing the direct sensitivity of Fe L-3-edge RIXS to the Fe 3d character in the occupied molecular orbitals, we also found that the donation interactions are dominated by sigma bonding. The latter was found to be stronger in the ferric complex, with an Fe 3d contribution to the nominally 5 sigma CN- molecular orbitals of 29% compared to 20% in the ferrous complex. These results are consistent with the notion that a higher charge at the central metal atom increases donation and decreases back-donation.
Y1 - 2016
U6 - https://doi.org/10.1021/acs.jpcb.6b04751
SN - 1520-6106
VL - 120
SP - 7182
EP - 7194
PB - American Chemical Society
CY - Washington
ER -
TY - BOOK
ED - Kutzinski, Vera M.
ED - Ette, Ottmar
T1 - Views of the cordilleras and monuments of the indigenous peoples of the Americas : a critical edition
Y1 - 2012
SN - 0-226-86506-1
PB - University of Chicago Press
CY - Chicago
ER -
TY - JOUR
A1 - Rauch, Thomas
A1 - Quinet, P.
A1 - Hoyer, D.
A1 - Werner, K.
A1 - Richter, Philipp
A1 - Kruk, J. W.
A1 - Demleitner, M.
T1 - VII. New Kr IV - VII oscillator strengths and an improved spectral analysis of the hot, hydrogen-deficient DO-type white dwarf RE 0503-289
JF - Plant physiology : an international journal devoted to physiology, biochemistry, cellular and molecular biology, biophysics and environmental biology of plants
N2 - Context. For the spectral analysis of high-resolution and high signal-to-noise (S/N) spectra of hot stars, state-of-the-art non-local thermodynamic equilibrium (NLTE) model atmospheres are mandatory. These are strongly dependent on the reliability of the atomic data that is used for their calculation. Aims. New Kr IV-VII oscillator strengths for a large number of lines enable us to construct more detailed model atoms for our NLTE model-atmosphere calculations. This enables us to search for additional Kr lines in observed spectra and to improve Kr abundance determinations. Methods. We calculated Kr IV-VII oscillator strengths to consider radiative and collisional bound-bound transitions in detail in our NLTE stellar-atmosphere models for the analysis of Kr lines that are exhibited in high-resolution and high S/N ultraviolet (UV) observations of the hot white dwarf RE 0503-289. Results. We reanalyzed the effective temperature and surface gravity and determined T-eff = 70 000 +/- 2000 K and log (g/cm s(-2)) = 7.5 +/- 0.1. We newly identified ten Kr V lines and one Kr vi line in the spectrum of RE 0503-289. We measured a Kr abundance of 3.3 +/- 0.3 (logarithmic mass fraction). We discovered that the interstellar absorption toward RE 0503-289 has a multi-velocity structure within a radial-velocity interval of -40 km s(-1) < upsilon(rad) < +18 km s(-1). Conclusions. Reliable measurements and calculations of atomic data are a prerequisite for state-of-the-art NLTE stellar-atmosphere modeling. Observed Kr V-VII line profiles in the UV spectrum of the white dwarf RE 0503-289 were simultaneously well reproduced with our newly calculated oscillator strengths.
KW - atomic data
KW - line: identification
KW - stars: abundances
KW - stars: individual: RE 0503-289
KW - virtual observatory tools
KW - stars: individual: RE 0457-281
Y1 - 2016
U6 - https://doi.org/10.1051/0004-6361/201628131
SN - 1432-0746
VL - 590
PB - EDP Sciences
CY - Les Ulis
ER -
TY - JOUR
A1 - Kosman, Admiʾel
T1 - Viktor Frankel Gazes out at the world from a concentration camp and teaches us how to utilize that gaze in our own spiritual lives
JF - CCAR journal
Y1 - 2020
SN - 0007-7976
SN - 1058-8760
VL - Fall 2020/Winter 2021
SP - 131
EP - 142
PB - CCAR Journal, Dept. of Religion
CY - Cleveland, Ohio
ER -
TY - JOUR
A1 - Gerecke, Christian
A1 - Schneider, Mandy
A1 - Scholtka, Bettina
T1 - Vimentin promoter methylation analysis is a suitable complement of a gene mutation marker panel for the detection of preneoplastic and neoplastic colonic lesions
N2 - Abstracts: Strukturen veraendern - Heilung verbessern. 29. Deutscher Krebskongress. Berlin 24.-27. Februar 201
Y1 - 2010
UR - http://www.karger.com/onk
U6 - https://doi.org/10.1159/000290860
SN - 0378-584X
ER -
TY - JOUR
A1 - Herwig, Falk
A1 - Schönberner, Detlef
A1 - Blöcker, Thomas
T1 - Violation of the Core Mass - Luminosity relation for AGB models wich experience the thord dredge-up
Y1 - 1999
ER -
TY - JOUR
A1 - Hartmann, Eddie
T1 - Violence
BT - constructing an emerging field of sociology
JF - International Journal of Conflict and Violence
Y1 - 2017
U6 - https://doi.org/10.4119/UNIBI/ijcv.623
SN - 1864-1385
VL - 11
SP - 1
EP - 9
PB - Institute for Interdisciplinary Conflict and Violence Research
CY - Bielefeld
ER -
TY - JOUR
A1 - Krahé, Barbara
T1 - Violence against women
JF - Current opinion in psychology
N2 - Violence against women causes suffering and misery to victims and their families and places a heavy burden on societies worldwide. It mostly happens within intimate relationships or between people known to each other. Violence against women is a social construction based on a societal consensus about the roles and rights of men and women. Two prevalent forms of violence against women are physical and sexual victimization by an intimate partner, and sexual victimization outside intimate relationships. Explanations of why men engage in aggressive behavior toward women address different levels, including the macro level of society, the micro level of dyadic interactions, and the individual level of perpetrator characteristics. Prevention efforts are needed that address each of these levels.
Y1 - 2017
U6 - https://doi.org/10.1016/j.copsyc.2017.03.017
SN - 2352-250X
SN - 2352-2518
VL - 19
SP - 6
EP - 10
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Wiemann, Dirk
A1 - Angermüller, Johannes
A1 - Bartels, Anke
A1 - Stopinska, Agata
T1 - Violence of Discourses - Disourses of Violence : an Introduction
Y1 - 2005
SN - 3-631-54226-7
ER -
TY - GEN
A1 - Krahé, Barbara
T1 - Violent Media Effects on Aggression: A Commentary from a Cross-Cultural Perspective
T2 - Analyses of social issues and public policy
N2 - It is argued that, despite differences in cultural norms and practices, the evidence for a link between violent media use and aggression is remarkably consistent across different countries. Along with evidence that different operationalizations of violent media use also converge across countries, these findings strengthen the conclusion that violent media are a risk factor for aggression and validate the psychological explanations for these effects. However, we need comparative studies based on a consistent methodology and a theory-based selection of cultural difference variables to properly examine the potential impact of culture on the association between violent media use and aggression.
Y1 - 2016
U6 - https://doi.org/10.1111/asap.12107
SN - 1529-7489
SN - 1530-2415
VL - 16
SP - 439
EP - 442
PB - Wiley-Blackwell
CY - Hoboken
ER -
TY - JOUR
A1 - Benson, Lawrence
A1 - Makait, Hendrik
A1 - Rabl, Tilmann
T1 - Viper
BT - An Efficient Hybrid PMem-DRAM Key-Value Store
JF - Proceedings of the VLDB Endowment
N2 - Key-value stores (KVSs) have found wide application in modern software systems. For persistence, their data resides in slow secondary storage, which requires KVSs to employ various techniques to increase their read and write performance from and to the underlying medium. Emerging persistent memory (PMem) technologies offer data persistence at close-to-DRAM speed, making them a promising alternative to classical disk-based storage. However, simply drop-in replacing existing storage with PMem does not yield good results, as block-based access behaves differently in PMem than on disk and ignores PMem's byte addressability, layout, and unique performance characteristics. In this paper, we propose three PMem-specific access patterns and implement them in a hybrid PMem-DRAM KVS called Viper. We employ a DRAM-based hash index and a PMem-aware storage layout to utilize the random-write speed of DRAM and efficient sequential-write performance PMem. Our evaluation shows that Viper significantly outperforms existing KVSs for core KVS operations while providing full data persistence. Moreover, Viper outperforms existing PMem-only, hybrid, and disk-based KVSs by 4-18x for write workloads, while matching or surpassing their get performance.
KW - memory
Y1 - 2021
U6 - https://doi.org/10.14778/3461535.3461543
SN - 2150-8097
VL - 14
IS - 9
SP - 1544
EP - 1556
PB - Association for Computing Machinery
CY - New York
ER -
TY - JOUR
A1 - Kimminich, Eva
T1 - Viral Information - The Shift of Meaning and Politics: An Introduction
to a Multi-Perspective Analysis of Internet Activities
JF - Virality and morphogenesis of right-wing internet populism
Y1 - 2018
SN - 978-3-631-76995-9
SP - 9
EP - 28
PB - Lang
CY - Berlin ; Bern ; Wien
ER -
TY - JOUR
A1 - Thom, Linda
T1 - Virality and Emotionality of the Lügenpresse Phenomenon: A Critical
Discourse Analysis of German and French Right-Wing Websites
JF - Virality and morphogenesis of right-wing internet populism
Y1 - 2018
SN - 978-3-631-76995-9
SP - 57
EP - 67
PB - Lang
CY - Berlin ; Bern ; Wien
ER -
TY - BOOK
ED - Kimminich, Eva
ED - Erdmann, Julius
ED - Dizdarević, Amir
T1 - Virality and morphogenesis of right-wing internet populism
T3 - Welt - Körper - Sprache ; 13
N2 - Information and its individual interpretations are highly discussed in social media. Their use and misuse is an important subject for cultural and media studies. The theoretical framework of this volume is based on a synopsis of socio-constructivist and semiotic paradigms, which permit insight into ongoing adjustments of the social perception of reality and the thereby changing benchmarks. The assembled micro-studies concentrate primarily on right-wing Internet populism in Germany, France and Italy and allow a more precise idea of the effects the disseminated myths, metaphors and memes can have: Becoming viral, they can have an influence on a society’s semiosphere, i.e.on common sense and social life.
Y1 - 2018
SN - 978-3-631-76995-9
PB - Lang
CY - Berlin ; Bern ; Wien
ER -
TY - INPR
A1 - Rosamond, Frances
A1 - Bardohl, Roswitha
A1 - Diehl, Stephan
A1 - Geisler, Uwe
A1 - Bolduan, Gordon
A1 - Lessmoellmann, Annette
A1 - Schwill, Andreas
A1 - Stege, Ulrike
T1 - Virtual extension reaching out to the media become a computer science ambassador
T2 - Communications of the ACM / Association for Computing Machinery
Y1 - 2011
U6 - https://doi.org/10.1145/1897852.1897880
SN - 0001-0782
VL - 54
IS - 3
SP - 113
EP - 116
PB - Association for Computing Machinery
CY - New York
ER -
TY - GEN
A1 - Sianipar, Johannes Harungguan
A1 - Willems, Christian
A1 - Meinel, Christoph
T1 - Virtual machine integrity verification in Crowd-Resourcing Virtual Laboratory
T2 - 2018 IEEE 11th Conference on Service-Oriented Computing and Applications (SOCA)
N2 - In cloud computing, users are able to use their own operating system (OS) image to run a virtual machine (VM) on a remote host. The virtual machine OS is started by the user using some interfaces provided by a cloud provider in public or private cloud. In peer to peer cloud, the VM is started by the host admin. After the VM is running, the user could get a remote access to the VM to install, configure, and run services. For the security reasons, the user needs to verify the integrity of the running VM, because a malicious host admin could modify the image or even replace the image with a similar image, to be able to get sensitive data from the VM. We propose an approach to verify the integrity of a running VM on a remote host, without using any specific hardware such as Trusted Platform Module (TPM). Our approach is implemented on a Linux platform where the kernel files (vmlinuz and initrd) could be replaced with new files, while the VM is running. kexec is used to reboot the VM with the new kernel files. The new kernel has secret codes that will be used to verify whether the VM was started using the new kernel files. The new kernel is used to further measuring the integrity of the running VM.
KW - Virtual Machine
KW - Integrity Verification
KW - Crowd-Resourcing
KW - Cloud Computing
Y1 - 2019
SN - 978-1-5386-9133-5
U6 - https://doi.org/10.1109/SOCA.2018.00032
SN - 2163-2871
SP - 169
EP - 176
PB - IEEE
CY - New York
ER -
TY - JOUR
A1 - Fromm, Jennifer
A1 - Stieglitz, Stefan
A1 - Mirbabaie, Milad
T1 - Virtual reality in digital education
BT - an affordance network perspective on effective use behavior
JF - ACM SIGMIS database
N2 - Virtual reality promises high potential as an immersive, hands-on learning tool for training 21st-century skills. However, previous research revealed that the mere use of digital tools in higher education does not automatically translate into learning outcomes. Instead, information systems studies emphasized the importance of effective use behavior to achieve technology usage goals. Applying the affordance network approach, we investigated what constitutes effective usage behavior regarding a virtual reality collaboration system in digital education. Therefore, we conducted 18 interviews with students and observations of six course sessions. The results uncover how affordance actualization contributed to the achievement of learning goals. A comparison with findings of previous studies on other information systems (i.e., electronic medical record systems, big data analytics, fitness wearables) allowed us to highlight system-specific differences in effective use behavior. We also demonstrated a clear distinction between concepts surrounding effective use theory facilitating the application of the affordance network approach in information systems research.
KW - virtual reality
KW - effective use behavior
KW - affordance network approach
KW - digital education
KW - qualitative research
Y1 - 2024
U6 - https://doi.org/10.1145/3663682.3663685
SN - 0095-0033
SN - 1532-0936
VL - 55
IS - 2
SP - 14
EP - 41
PB - ACM
CY - New York, NY
ER -
TY - JOUR
A1 - Pawassar, Christian Matthias
A1 - Tiberius, Victor
T1 - Virtual reality in health care
BT - Bibliometric analysis
JF - JMIR Serious Games
N2 - Background:
Research into the application of virtual reality technology in the health care sector has rapidly increased, resulting in a large body of research that is difficult to keep up with.
Objective:
We will provide an overview of the annual publication numbers in this field and the most productive and influential countries, journals, and authors, as well as the most used, most co-occurring, and most recent keywords.
Methods:
Based on a data set of 356 publications and 20,363 citations derived from Web of Science, we conducted a bibliometric analysis using BibExcel, HistCite, and VOSviewer.
Results:
The strongest growth in publications occurred in 2020, accounting for 29.49% of all publications so far. The most productive countries are the United States, the United Kingdom, and Spain; the most influential countries are the United States, Canada, and the United Kingdom. The most productive journals are the Journal of Medical Internet Research (JMIR), JMIR Serious Games, and the Games for Health Journal; the most influential journals are Patient Education and Counselling, Medical Education, and Quality of Life Research. The most productive authors are Riva, del Piccolo, and Schwebel; the most influential authors are Finset, del Piccolo, and Eide. The most frequently occurring keywords other than “virtual” and “reality” are “training,” “trial,” and “patients.” The most relevant research themes are communication, education, and novel treatments; the most recent research trends are fitness and exergames.
Conclusions:
The analysis shows that the field has left its infant state and its specialization is advancing, with a clear focus on patient usability.
KW - virtual reality
KW - healthcare
KW - bibliometric analysis
KW - literature review
KW - citation analysis
KW - VR
KW - usability
KW - review
KW - health care
Y1 - 2021
U6 - https://doi.org/10.2196/32721
SN - 2291-9279
VL - 9
SP - 1
EP - 19
PB - JMIR Publications
CY - Toronto, Kanada
ET - 4
ER -
TY - JOUR
A1 - Adel, Mustafa
A1 - Elbehery, Ali H. A.
A1 - Aziz, Sherry K.
A1 - Aziz, Ramy K.
A1 - Grossart, Hans-Peter
A1 - Siam, Rania
T1 - Viruses-to-mobile genetic elements skew in the deep Atlantis II brine pool sediments
JF - Scientific reports
N2 - The central rift of the Red Sea has 25 brine pools with different physical and geochemical characteristics. Atlantis II (ATIID), Discovery Deeps (DD) and Chain Deep (CD) are characterized by high salinity, temperature and metal content. Several studies reported microbial communities in these brine pools, but few studies addressed the brine pool sediments. Therefore, sediment cores were collected from ATIID, DD, CD brine pools and an adjacent brine-influenced site. Sixteen different lithologic sediment sections were subjected to shotgun DNA pyrosequencing to generate 1.47 billion base pairs (1.47 x 10(9) bp). We generated sediment-specific reads and attempted to annotate all reads. We report the phylogenetic and biochemical uniqueness of the deepest ATIID sulfur-rich brine pool sediments. In contrary to all other sediment sections, bacteria dominate the deepest ATIID sulfur-rich brine pool sediments. This decrease in virus-to-bacteria ratio in selected sections and depth coincided with an overrepresentation of mobile genetic elements. Skewing in the composition of viruses-to-mobile genetic elements may uniquely contribute to the distinct microbial consortium in sediments in proximity to hydrothermally active vents of the Red Sea and possibly in their surroundings, through differential horizontal gene transfer.
Y1 - 2016
U6 - https://doi.org/10.1038/srep32704
SN - 2045-2322
VL - 6
SP - 8882
EP - 8888
PB - Nature Publ. Group
CY - London
ER -
TY - JOUR
A1 - Goychuk, Igor
T1 - Viscoelastic subdiffusion in a random Gaussian environment
JF - Physical chemistry, chemical physics : a journal of European Chemical Societies
N2 - Viscoelastic subdiffusion governed by a fractional Langevin equation is studied numerically in a random Gaussian environment modeled by stationary Gaussian potentials with decaying spatial correlations. This anomalous diffusion is archetypal for living cells, where cytoplasm is known to be viscoelastic and a spatial disorder also naturally emerges. We obtain some first important insights into it within a model one-dimensional study. Two basic types of potential correlations are studied: short-range exponentially decaying and algebraically slow decaying with an infinite correlation length, both for a moderate (several kBT, in the units of thermal energy), and strong (5–10kBT) disorder. For a moderate disorder, it is shown that on the ensemble level viscoelastic subdiffusion can easily overcome the medium's disorder. Asymptotically, it is not distinguishable from the disorder-free subdiffusion. However, a strong scatter in single-trajectory averages is nevertheless seen even for a moderate disorder. It features a weak ergodicity breaking, which occurs on a very long yet transient time scale. Furthermore, for a strong disorder, a very long transient regime of logarithmic, Sinai-type diffusion emerges. It can last longer and be faster in the absolute terms for weakly decaying correlations as compared with the short-range correlations. Residence time distributions in a finite spatial domain are of a generalized log-normal type and are reminiscent also of a stretched exponential distribution. They can be easily confused for power-law distributions in view of the observed weak ergodicity breaking. This suggests a revision of some experimental data and their interpretation.
Y1 - 2018
U6 - https://doi.org/10.1039/c8cp05238g
SN - 1463-9076
SN - 1463-9084
VL - 20
IS - 37
SP - 24140
EP - 24155
PB - Royal Society of Chemistry
CY - Cambridge
ER -
TY - BOOK
A1 - Weian, Liu
T1 - Viscosity Solutions of Fully Nonlinea Parabolic Systems
T3 - Preprint / Universität Potsdam, Institut für Mathematik, Arbeitsgruppe Partiell
Y1 - 2002
SN - 1437-739X
PB - Univ.
CY - Potsdam
ER -
TY - JOUR
A1 - Salo, H.
A1 - Schmidt, Jürgen
A1 - Spahn, Frank
T1 - Viscous overstability in Saturn's B ring : I. Direct simulations and measurements of transport coefficients
Y1 - 2001
ER -
TY - JOUR
A1 - Schmidt, Jürgen
A1 - Salo, H.
A1 - Spahn, Frank
T1 - Viscous overstability in Saturn's B ring : II. Hydrodynamic theory and comparison to simulations
Y1 - 2001
ER -
TY - JOUR
A1 - Gessinger, Joachim
T1 - Visible Sounds and Audible Colours : the Ocular Harpsichord of Louis-Bertrand Castel
Y1 - 1996
ER -
TY - JOUR
A1 - Brosch, Renate
T1 - Visible victual : victorian iconographies of dining
Y1 - 2003
ER -
TY - JOUR
A1 - Ugwuja, Chidinma G.
A1 - Adelowo, Olawale O.
A1 - Ogunlaja, Aemere
A1 - Omorogie, Martins O.
A1 - Olukanni, Olumide D.
A1 - Ikhimiukor, Odion O.
A1 - Iermak, Ievgeniia
A1 - Kolawole, Gabriel A.
A1 - Günter, Christina
A1 - Taubert, Andreas
A1 - Bodede, Olusola
A1 - Moodley, Roshila
A1 - Inada, Natalia M.
A1 - Camargo, Andrea S.S. de
A1 - Unuabonah, Emmanuel Iyayi
T1 - Visible-Light-Mediated Photodynamic Water Disinfection @ Bimetallic-Doped Hybrid Clay Nanocomposites
JF - ACS applied materials & interfaces
N2 - This study reports a new class of photocatalytic hybrid clay nanocomposites prepared from low-cost sources (kaolinite clay and Carica papaya seeds) doped with Zn and Cu salts via a solvothermal process. X-ray diffraction analysis suggests that Cu-doping and Cu/Zn-doping introduce new phases into the crystalline structure of Kaolinite clay, which is linked to the reduced band gap of kaolinite from typically between 4.9 and 8.2 eV to 2.69 eV for Cu-doped and 1.5 eV for Cu/Zn hybrid clay nanocomposites (Nisar, J.; Arhammar, C.; Jamstorp, E.; Ahuja, R. Phys. Rev. B 2011, 84, 075120). In the presence of solar light irradiation, Cu- and Cu/Zn-doped nanocomposites facilitate the electron hole pair separation. This promotes the generation of singlet oxygen which in turn improves the water disinfection efficiencies of these novel nanocomposite materials. The nanocomposite materials were further characterized using high-resolution scanning electron microscopy, fluorimetry, therrnogravimetric analysis, and Raman spectroscopy. The breakthrough times of the nanocomposites for a fixed bed mode of disinfection of water contaminated with 2.32 x 10(7) cfu/mL E. coli ATCC 25922 under solar light irradiation are 25 h for Zn-doped, 30 h for Cu-doped, and 35 h for Cu/Zn-doped nanocomposites. In the presence of multidrug and multimetal resistant strains of E. coli, the breakthrough time decreases significantly. Zn-only doped nanocomposites are not photocatalytically active. In the absence of light, the nanocomposites are still effective in decontaminating water, although less efficient than under solar light irradiation. Electrostatic interaction, metal toxicity, and release of singlet oxygen (only in the Cu-doped and Cu/Zn-doped nanocomposites) are the three disinfection mechanisms by which these nanocomposites disinfect water. A regrowth study indicates the absence of any living E. coli cells in treated water even after 4 days. These data and the long hydraulic times (under gravity) exhibited by these nanocomposites during photodisinfection of water indicate an unusually high potential of these nanocomposites as efficient, affordable, and sustainable point-of-use systems for the disinfection of water in developing countries.
KW - disinfection
KW - nanocomposite material
KW - multidrug-resistant Escherichia coli
KW - water
KW - reactive oxygen species
Y1 - 2019
U6 - https://doi.org/10.1021/acsami.9b01212
SN - 1944-8244
SN - 1944-8252
VL - 11
IS - 28
SP - 25483
EP - 25494
PB - American Chemical Society
CY - Washington, DC
ER -
TY - INPR
A1 - Caligiore, Daniele
A1 - Fischer, Martin H.
T1 - Vision, action and language unified through embodiment
T2 - Psychological research : an international journal of perception, attention, memory, and action
Y1 - 2013
U6 - https://doi.org/10.1007/s00426-012-0417-0
SN - 0340-0727
VL - 77
IS - 1
SP - 1
EP - 6
PB - Springer
CY - Heidelberg
ER -
TY - JOUR
A1 - de Guevara, Berit Bliesemann
T1 - visits in zones of conflict and intervention
JF - Journal of intervention and statebuilding
N2 - This article explores the practice and political significance of politicians’ journeys to conflict zones. It focuses on the German example, looking at field trips to theatres of international intervention as a way of first-hand knowledge in policymaking. Paying tribute to Lisa Smirl and her work on humanitarian spaces, objects and imaginaries and on liminality in aid worker biographies, two connected arguments are developed. First, through the exploration of the routinized practices of politicians’ field trips the article shows how these journeys not only remain confined to the ‘auxiliary space’ of aid/intervention, but that it is furthermore a staged reality of this auxiliary space that most politicians experience on their journeys. The question is then asked, second, what politicians actually experience on their journeys and how their experiences relate to their policy knowledge about conflict and intervention. It is shown that political field trips enable sensory/affectual, liminoid and liminal experiences, which have functions such as authority accumulation, agenda setting, community building, and civilizing domestic politics, while at the same time reinforcing, in most cases, pre-existing conflict and intervention imaginaries.
KW - field trips
KW - on-site visits
KW - battlefield tourism
KW - sensory experience
KW - affect
KW - conflict knowledge
KW - spaces of aid
KW - liminality
KW - German Bundestag
KW - parliamentarians
KW - German foreign policy
KW - Lisa Smirl
Y1 - 2016
U6 - https://doi.org/10.1080/17502977.2015.1137394
SN - 1750-2977
SN - 1750-2985
VL - 10
SP - 56
EP - 76
PB - Soil Science Society of America
CY - Abingdon
ER -
TY - JOUR
A1 - Rolfs, Martin
A1 - Dambacher, Michael
A1 - Cavanagh, Patrick
T1 - Visual adaptation of the perception of causality
JF - Current biology
N2 - We easily recover the causal properties of visual events, enabling us to understand and predict changes in the physical world. We see a tennis racket hitting a ball and sense that it caused the ball to fly over the net; we may also have an eerie but equally compelling experience of causality if the streetlights turn on just as we slam our car's door. Both perceptual [1] and cognitive [2] processes have been proposed to explain these spontaneous inferences, but without decisive evidence one way or the other, the question remains wide open [3-8]. Here, we address this long-standing debate using visual adaptation-a powerful tool to uncover neural populations that specialize in the analysis of specific visual features [9-12]. After prolonged viewing of causal collision events called "launches" [1], subsequently viewed events were judged more often as noncausal. These negative aftereffects of exposure to collisions are spatially localized in retinotopic coordinates, the reference frame shared by the retina and visual cortex. They are not explained by adaptation to other stimulus features and reveal visual routines in retinotopic cortex that detect and adapt to cause and effect in simple collision stimuli.
Y1 - 2013
U6 - https://doi.org/10.1016/j.cub.2012.12.017
SN - 0960-9822
VL - 23
IS - 3
SP - 250
EP - 254
PB - Cell Press
CY - Cambridge
ER -
TY - CHAP
A1 - Vladova, Gergana
A1 - Ullrich, André
A1 - Sultanow, Eldar
A1 - Tobolla, Marinho
A1 - Sebrak, Sebastian
A1 - Czarnecki, Christian
A1 - Brockmann, Carsten
ED - Klein, Maike
ED - Krupka, Daniel
ED - Winter, Cornelia
ED - Wohlgemuth, Volker
T1 - Visual analytics for knowledge management
BT - advantages for organizations and interorganizational teams
T2 - Informatik 2023
N2 - The management of knowledge in organizations considers both established long-term
processes and cooperation in agile project teams. Since knowledge can be both tacit and explicit, its transfer from the individual to the organizational knowledge base poses a challenge in organizations. This challenge increases when the fluctuation of knowledge carriers is exceptionally high. Especially in large projects in which external consultants are involved, there is a risk that critical, company-relevant knowledge generated in the project will leave the company with the external knowledge carrier and thus be lost. In this paper, we show the advantages of an early warning system for knowledge management to avoid this loss. In particular, the potential of visual analytics in the context of knowledge management systems is presented and discussed. We present a project for the development of a business-critical software system and discuss the first implementations and results.
KW - knowledge management
KW - visual analytics
KW - knowledge transfer
KW - teamwork
KW - knowledge management system
KW - tacit knowledge
KW - explicit knowledge
Y1 - 2023
SN - 978-3-88579-731-9
U6 - https://doi.org/10.18420/inf2023_187
SN - 1617-5468
SP - 1851
EP - 1870
PB - Gesellschaft für Informatik e.V. (GI)
CY - Bonn
ER -
TY - JOUR
A1 - Myachykov, Andriy
A1 - Ellis, Rob
A1 - Cangelosi, Angelo
A1 - Fischer, Martin H.
T1 - Visual and linguistic cues to graspable objects
JF - Experimental brain research
N2 - Two experiments investigated (1) how activation of manual affordances is triggered by visual and linguistic cues to manipulable objects and (2) whether graspable object parts play a special role in this process. Participants pressed a key to categorize manipulable target objects copresented with manipulable distractor objects on a computer screen. Three factors were varied in Experiment 1: (1) the target's and (2) the distractor's handles' orientation congruency with the lateral manual response and (3) the Visual Focus on one of the objects. In Experiment 2, a linguistic cue factor was added to these three factors-participants heard the name of one of the two objects prior to the target display onset. Analysis of participants' motor and oculomotor behaviour confirmed that perceptual and linguistic cues potentiated activation of grasp affordances. Both target- and distractor-related affordance effects were modulated by the presence of visual and linguistic cues. However, a differential visual attention mechanism subserved activation of compatibility effects associated with target and distractor objects. We also registered an independent implicit attention attraction effect from objects' handles, suggesting that graspable parts automatically attract attention during object viewing. This effect was further amplified by visual but not linguistic cues, thus providing initial evidence for a recent hypothesis about differential roles of visual and linguistic information in potentiating stable and variable affordances (Borghi in Language and action in cognitive neuroscience. Psychology Press, London, 2012).
KW - Grasp affordances
KW - Naming
KW - Visual attention
KW - Object categorization
Y1 - 2013
U6 - https://doi.org/10.1007/s00221-013-3616-z
SN - 0014-4819
VL - 229
IS - 4
SP - 545
EP - 559
PB - Springer
CY - New York
ER -
TY - JOUR
A1 - Sekerina, Irina A.
A1 - Sauermann, Antje
T1 - Visual attention and quantifier-spreading in heritage Russian bilinguals
JF - Second language research
N2 - It is well established in language acquisition research that monolingual children and adult second language learners misinterpret sentences with the universal quantifier every and make quantifier-spreading errors that are attributed to a preference for a match in number between two sets of objects. The present Visual World eye-tracking study tested bilingual heritage Russian-English adults and investigated how they interpret of sentences like Every alligator lies in a bathtub in both languages. Participants performed a sentence-picture verification task while their eye movements were recorded. Pictures showed three pairs of alligators in bathtubs and two extra objects: elephants (Control condition), bathtubs (Overexhaustive condition), or alligators (Underexhaustive condition). Monolingual adults performed at ceiling in all conditions. Heritage language (HL) adults made 20% q-spreading errors, but only in the Overexhaustive condition, and when they made an error they spent more time looking at the two extra bathtubs during the Verb region. We attribute q-spreading in HL speakers to cognitive overload caused by the necessity to integrate conflicting sources of information, i.e. the spoken sentences in their weaker, heritage, language and attention-demanding visual context, that differed with respect to referential salience.
KW - eye-tracking
KW - heritage language
KW - quantifier-spreading
KW - Russian
KW - universal quantifiers
KW - visual attention
Y1 - 2015
U6 - https://doi.org/10.1177/0267658314537292
SN - 0267-6583
SN - 1477-0326
VL - 31
IS - 1
SP - 75
EP - 104
PB - Sage Publ.
CY - London
ER -
TY - JOUR
A1 - Pearce, Warren
A1 - Özkula, Suay M.
A1 - Greene, Amanda K.
A1 - Teeling, Lauren
A1 - Bansard, Jennifer S.
A1 - Omena, Janna Joceli
A1 - Rabello, Elaine Teixeira
T1 - Visual cross-platform analysis
JF - Information, Communication and Society: digital methods to research social media images
N2 - Analysis of social media using digital methods is a flourishing approach. However, the relatively easy availability of data collected via platform application programming interfaces has arguably led to the predominance of single-platform research of social media. Such research has also privileged the role of text in social media analysis, as a form of data that is more readily gathered and searchable than images. In this paper, we challenge both of these prevailing forms of social media research by outlining a methodology for visual cross-platform analysis (VCPA), defined as the study of still and moving images across two or more social media platforms. Our argument contains three steps. First, we argue that cross-platform analysis addresses a gap in research methods in that it acknowledges the interplay between a social phenomenon under investigation and the medium within which it is being researched, thus illuminating the different affordances and cultures of web platforms. Second, we build on the literature on multimodal communication and platform vernacular to provide a rationale for incorporating the visual into cross-platform analysis. Third, we reflect on an experimental cross-platform analysis of images within social media posts (n = 471,033) used to communicate climate change to advance different modes of macro- and meso-levels of analysis that are natively visual: image-text networks, image plots and composite images. We conclude by assessing the research pathways opened up by VCPA, delineating potential contributions to empirical research and theory and the potential impact on practitioners of social media communication.
KW - research methodology
KW - visual analysis
KW - social media
KW - climate change
Y1 - 2018
U6 - https://doi.org/10.1080/1369118X.2018.1486871
SN - 1468-4462
SN - 1369-118X
VL - 23
IS - 2
SP - 161
EP - 180
PB - Routledge
CY - London
ER -
TY - JOUR
A1 - Brosch, Renate
T1 - Visual Culture
Y1 - 2004
ER -
TY - JOUR
A1 - Baedke, Jan
A1 - Schöttler, Tobias
T1 - Visual Metaphors in the Sciences
BT - the Case of Epigenetic Landscape Images
JF - Journal for General Philosophy of Science
N2 - Recent philosophical analyses of the epistemic dimension of images in the sciences show a certain trend in acknowledging potential roles of these images beyond their merely decorative or pedagogical functions. We argue, however, that this new debate has yet paid little attention to a special type of pictures, we call ‘visual metaphor’, and its versatile heuristic potential in organizing data, supporting communication, and guiding research, modeling, and theory formation. Based on a case study of Conrad Hal Waddington’s epigenetic landscape images in biology, we develop a descriptive framework applicable to heuristic roles of various visual metaphors in the sciences.
KW - Conrad Hal Waddington
KW - Epigenetic landscape
KW - Modelling
KW - Scientific images
KW - Theory formation
KW - Visual metaphor
Y1 - 2017
U6 - https://doi.org/10.1007/s10838-016-9353-9
SN - 0925-4560
SN - 1572-8587
VL - 48
SP - 173
EP - 194
PB - Springer
CY - Dordrecht
ER -
TY - CHAP
A1 - Köster, Antonia
A1 - Krasnova, Hanna
A1 - Tarafdar, Monideepa
T1 - Visual normalization of the thin ideal
BT - Instagram use and biased perception of average body weight
T2 - Wirtschaftsinformatik 2022 Proceedings: track 21
N2 - Visual Social Networking Sites (SNSs) enable users to present themselves favorably to gain likes and the attention of others. Especially, Instagram is known for its focus on beauty, fitness, fashion, and dietary topics. Although a large body of research reports negative weight-related outcomes of SNS usage (e.g., body dissatisfaction, body image concerns), studies examining how SNS usage relates to these outcomes are scarce. Based on the visual normalization theory, we argue that SNS content facilitates normalization of so-called thin- and fit-ideals, thereby leading to biased perceptions of the average body weight in society. Therefore, this study tests whether Instagram use is associated with perceiving that the average person weighs less. Responses of 181 survey participants confirm that Instagram use is negatively related to average weight perception of both women and men. These findings contribute to the growing body of research on how SNS use relates to negative weight-related outcomes.
KW - social networking sites
KW - Instragram
KW - weight perception
KW - visual normalization theory
Y1 - 2022
UR - https://aisel.aisnet.org/wi2022/social_media/social/1
PB - AIS Electronic Library (AISeL)
CY - [Erscheinungsort nicht ermittelbar]
ER -
TY - JOUR
A1 - Laue, Ralf
A1 - Awad, Ahmed Mahmoud Hany Aly
T1 - Visual suggestions for improvements in business process diagrams
JF - Journal of visual languages and computing
N2 - Business processes are commonly modeled using a graphical modeling language. The most widespread notation for this purpose is business process diagrams in the Business Process Modeling Notation (BPMN). In this article, we use the visual query language BPMN-Q for expressing patterns that are related to possible problems in such business process diagrams. We discuss two classes of problems that can be found frequently in real-world models: sequence flow errors and model fragments that can make the model difficult to understand.
By using a query processor, a business process modeler is able to identify possible errors in business process diagrams. Moreover, the erroneous parts of the business process diagram can be highlighted when an instance of an error pattern is found. This way, the modeler gets an easy-to-understand feedback in the visual modeling language he or she is familiar with. This is an advantage over current validation methods, which usually lack this kind of intuitive feedback.
KW - Business process model
KW - Business process diagram
KW - BPMN-Q
KW - Visualization
Y1 - 2011
U6 - https://doi.org/10.1016/j.jvlc.2011.04.003
SN - 1045-926X
VL - 22
IS - 5
SP - 385
EP - 399
PB - Elsevier
CY - London
ER -
TY - JOUR
A1 - Rolfs, Martin
A1 - Ohl, Sven
T1 - Visual suppression in the superior colliculus around the time of microsaccades
JF - Journal of neurophysiology
N2 - Miniature eye movements jitter the retinal image unceasingly, raising the question of how perceptual continuity is achieved during visual fixation. Recent work discovered suppression of visual bursts in the superior colliculus around the time of microsaccades, tiny jerks of the eyes that support visual perception while gaze is fixed. This finding suggests that corollary discharge, supporting visual stability when rapid eye movements drastically shift the retinal image, may also exist for the smallest saccades.
Y1 - 2011
U6 - https://doi.org/10.1152/jn.00862.2010
SN - 0022-3077
VL - 105
IS - 1
SP - 1
EP - 3
PB - American Chemical Society
CY - Bethesda
ER -
TY - JOUR
A1 - Kleinpeter, Erich
A1 - Szatmári, István
A1 - Lázár, László
A1 - Koch, Andreas
A1 - Heydenreich, Matthias
A1 - Fulop, Ferenc
T1 - Visualization and quantification of anisotropic effects on the 1H NMR spectra of 1,3-oxazino[4,3- alpha]isoquinolines - indirect estimates of steric compression
N2 - The anisotropic effects of the phenyl, alpha- and beta-naphthyl moieties in four series of 1,3-oxazino[4,3- a]isoquinolines on the H-1 chemical shifts of the isoquinoline protons were calculated by employing the Nucleus Independent Chemical Shift (NICS) concept and Visualized as anisotropic cones by a through-space NMR shielding grid. The signs and extents of these spatial effects on the H-1 chemical shifts of the isoquinoline protons were compared with the experimental H-1 NMR spectra. The differences between the experimental delta (H-1)/ppm values and the calculated anisotropic effects of the aromatic moieties are discussed in terms of the steric compression that occurs in the Compounds studied.
Y1 - 2009
U6 - https://doi.org/10.1016/j.tet.2009.07.038
SN - 0040-4020
ER -
TY - JOUR
A1 - Kleinpeter, Erich
A1 - Koch, Andreas
A1 - Seidl, Peter R.
T1 - Visualization and quantification of the anisotropic effect of C=C double bonds on 1H NMR spectra of highly congested hydrocarbons-indirect estimates of steric strain
N2 - The anisotropic effect of the olefinic C=C double bond has been calculated by employing the NICS (nucleus independent chemical shift) concept and visualized as an anisotropic cone by a through space NMR shielding grid. Sign and size of this spatial effect on 1H chemical shifts of protons in norbornene, exo- and endo-2-methylnorbornenes, and in three highly congested tetracyclic norbornene analogs have been compared with the experimental 1H NMR spectra as far as published. 1H NMR spectra have also been calculated at the HF/6-31G* level of theory to get a full, comparable set of proton chemical shifts. Differences between ;(1H)/ppm and the calculated anisotropic effect of the C=C double bond are discussed in terms of the steric compression that occurs in the compounds studied.
Y1 - 2008
UR - http://pubs.acs.org/doi/full/10.1021/jp801063t
U6 - https://doi.org/10.1021/Jp801063t
ER -
TY - JOUR
A1 - Witte, Leonie
A1 - Linnemannstoens, Karen
A1 - Honemann-Capito, Mona
A1 - Groß, Julia Christina
T1 - Visualization and quantitation of Wg trafficking in the Drosophila wing imaginal epithelium
JF - Bio-protocol
N2 - Secretory Wnt trafficking can be studied in the polarized epithelial monolayer of Drosophila wing imaginal discs (WID). In this tissue, Wg (Drosophila Wnt-I) is presented on the apical surface of its source cells before being internalized into the endosomal pathway. Long-range Wg secretion and spread depend on secondary secretion from endosomal compartments, but the exact post-endocytic fate of Wg is poorly understood. Here, we summarize and present three protocols for the immunofluorescencebased visualization and quantitation of different pools of intracellular and extracellular Wg in WID: (1) steady-state extracellular Wg; (2) dynamic Wg trafficking inside endosomal compartments; and (3) dynamic Wg release to the cell surface. Using a genetic driver system for gene manipulation specifically at the posterior part of the WID (EnGal4) provides a robust internal control that allows for direct comparison of signal intensities of control and manipulated compartments of the same WID. Therefore, it also circumvents the high degree of staining variability usually associated with whole-tissue samples. In combination with the genetic manipulation of Wg pathway components that is easily feasible in Drosophila, these methods provide a tool-set for the dissection of secretory Wg trafficking and can help us to understand how Wnt proteins travel along endosomal compartments for short-and long-range signal secretion.
KW - Wingless/Wnt secretion
KW - Morphogen signaling
KW - Drosophila wing imaginal disc
KW - Recycling assay
KW - Extracelluar wingless
KW - Imaginal disc dissection
Y1 - 2021
U6 - https://doi.org/10.21769/BioProtoc.4040
SN - 2331-8325
VL - 11
IS - 11
PB - bio-protocol.org
CY - Sunnyvale, CA
ER -
TY - JOUR
A1 - Stolterfoht, Martin
A1 - Wolff, Christian Michael
A1 - Marquez, Jose A.
A1 - Zhang, Shanshan
A1 - Hages, Charles J.
A1 - Rothhardt, Daniel
A1 - Albrecht, Steve
A1 - Burn, Paul L.
A1 - Meredith, Paul
A1 - Unold, Thomas
A1 - Neher, Dieter
T1 - Visualization and suppression of interfacial recombination for high-efficiency large-area pin perovskite solar cells
JF - Nature Energy
N2 - The performance of perovskite solar cells is predominantly limited by non-radiative recombination, either through trap-assisted recombination in the absorber layer or via minority carrier recombination at the perovskite/transport layer interfaces. Here, we use transient and absolute photoluminescence imaging to visualize all non-radiative recombination pathways in planar pintype perovskite solar cells with undoped organic charge transport layers. We find significant quasi-Fermi-level splitting losses (135 meV) in the perovskite bulk, whereas interfacial recombination results in an additional free energy loss of 80 meV at each individual interface, which limits the open-circuit voltage (V-oc) of the complete cell to similar to 1.12 V. Inserting ultrathin interlayers between the perovskite and transport layers leads to a substantial reduction of these interfacial losses at both the p and n contacts. Using this knowledge and approach, we demonstrate reproducible dopant-free 1 cm(2) perovskite solar cells surpassing 20% efficiency (19.83% certified) with stabilized power output, a high V-oc (1.17 V) and record fill factor (>81%).
KW - Energy science and technology
KW - Solar cells
Y1 - 2018
U6 - https://doi.org/10.1038/s41560-018-0219-8
SN - 2058-7546
VL - 3
IS - 10
SP - 847
EP - 854
PB - Nature Publ. Group
CY - London
ER -
TY - BOOK
A1 - Morin, Paul
T1 - Visualization in the geosciences : course notes
T3 - Preprint NLD
Y1 - 1995
VL - 19
PB - Univ.
CY - Potsdam
ER -
TY - JOUR
A1 - Kuntzsch, Christian
T1 - Visualization of data transfer paths
JF - Process design for natural scientists: an agile model-driven approach
N2 - A workflow for visualizing server connections using the Google Maps API was built in the jABC. It makes use of three basic services: An XML-based IP address geolocation web service, a command line tool and the Static Maps API. The result of the workflow is an URL leading to an image file of a map, showing server connections between a client and a target host.
Y1 - 2014
SN - 978-3-662-45005-5
SN - 1865-0929
IS - 500
SP - 140
EP - 148
PB - Springer
CY - Berlin
ER -
TY - THES
A1 - Bohnet, Johannes
T1 - Visualization of Execution Traces and its Application to Software Maintenance
Y1 - 2010
CY - Potsdam
ER -
TY - JOUR
A1 - Kleinpeter, Erich
A1 - Koch, Andreas
T1 - Visualization of homoaromaticity in cations, neutral molecules and anions by spatial magnetic properties (through space NMR shieldings) - an 1H/13C NMR chemical shift study
N2 - Prototypes for homoaromaticity in cations, neutral molecules, and anions are theoretically studied at the MP2 level of theory. For the global minimum structures on the potential energy surface both 1H/13C chemical shifts and spatial magnetic properties as through space NMR shieldings (TSNMRS) were calculated by the GIAO perturbation method. The TSNMRS are visualized as iso-chemical-shielding surfaces (ICSS) of different sign and size. Coincident experimental and computed 1H/13C chemical shifts afforded the possibility to decide from the TSNMRSs at hand on both the existence and the size of homoaromaticity in the molecules studied.
Y1 - 2009
UR - http://www.sciencedirect.com/science/journal/00404020
U6 - https://doi.org/10.1016/j.tet.2009.04.063
SN - 0040-4020
ER -
TY - JOUR
A1 - König, Tobias
A1 - Santer, Svetlana
T1 - Visualization of surface plasmon interference by imprinting intensity patterns on a photosensitive polymer
JF - Nanotechnology
N2 - We report on sub-wavelength structuring of photosensitive azo-containing polymer films induced by a surface plasmon interference intensity pattern. The two surface plasmon waves generated at neighboring nano-slits in the metal layer during irradiation interfere constructively, resulting in an intensity pattern with a periodicity three times smaller than the wavelength of the incoming light. The near field pattern interacts with the photosensitive polymer film placed above it, leading to a topography change which follows the intensity pattern exactly, resulting in the formation of surface relief gratings of a size below the diffraction limit. We analyze numerically and experimentally how the depth of the nano-slit alters the interference pattern of surface plasmons and find that the sub-wavelength patterning of the polymer surface could be optimized by modifying the geometry and the size of the nano-slit.
Y1 - 2012
U6 - https://doi.org/10.1088/0957-4484/23/48/485304
SN - 0957-4484
VL - 23
IS - 48
PB - IOP Publ. Ltd.
CY - Bristol
ER -
TY - JOUR
A1 - Kleinpeter, Erich
A1 - Klod, Sabrina
A1 - Koch, Andreas
T1 - Visualization of through space NMR shieldings of aromatic and anti-aromatic molecules and a simple means to compare and estimate aromaticity
N2 - Through space NMR shieldings of aromatic (benzene, mono-substituted and annelated benzenes, ferrocene, [14]- and [18]-annulenes, phenylenes and tetra- to heptahelicene) and anti-aromatic molecules (cyclobutadiene and pentalene) were assessed by ab initio molecular-orbital calculations. Employing the nucleus-independent chemical shifts (NICS) concept, these through space NMR shieldings were visualized as iso-chemical-shielding surfaces (ICSSs) and can be applied quantitatively to determine the stereochemistry of proximal nuclei. In addition, the distances in Å at ICSS values of ±0.1 ppm in-plane and perpendicular-to-center of the aromatic ring system were employed as a simple means to compare and estimate qualitatively the aromaticity of the systems at hand.
Y1 - 2007
UR - http://www.sciencedirect.com/science/journal/01661280
U6 - https://doi.org/10.1016/j.theochem.2007.02.049
SN - 0166-1280
ER -
TY - JOUR
A1 - Koc-Januchta, Marta
A1 - Höffler, Tim
A1 - Thoma, Gun-Brit
A1 - Prechtl, Helmut
A1 - Leutner, Detlev
T1 - Visualizers versus verbalizers
BT - Effects of cognitive style on learning with texts and pictures - An eye-tracking study
JF - Computers in human behavior
N2 - This study was conducted in order to examine the differences between visualizers and verbalizers in the way they gaze at pictures and texts while learning. Using a collection of questionnaires, college students were classified according to their visual or verbal cognitive style and were asked to learn about two different, in terms of subject and type of knowledge, topics by means of text-picture combinations. Eye-tracking was used to investigate their gaze behavior. The results show that visualizers spent significantly more time inspecting pictures than verbalizers, while verbalizers spent more time inspecting texts. Results also suggest that both visualizers' and verbalizers' way of learning is active but mostly within areas providing the source of information in line with their cognitive style (pictures or text). Verbalizers tended to enter non-informative, irrelevant areas of pictures sooner than visualizers. The comparison of learning outcomes showed that the group of visualizers achieved better results than the group of verbalizers on a comprehension test.
KW - Cognitive style
KW - Verbalizer
KW - Visualizer
KW - Eye-tracking
KW - Multimedia learning
Y1 - 2016
U6 - https://doi.org/10.1016/j.chb.2016.11.028
SN - 0747-5632
SN - 1873-7692
VL - 68
SP - 170
EP - 179
PB - Elsevier
CY - Oxford
ER -
TY - BOOK
A1 - Kirsch, Florian
A1 - Nienhaus, Marc
A1 - Döllner, Jürgen Roland Friedrich
T1 - Visualizing design and spatial assembly of interactive CSG
T3 - Technische Berichte des Hasso-Plattner-Instituts für Softwaresystemtechnik an der Universität Potsda
Y1 - 2005
SN - 3-937786-56-2
SN - 1613-5652
VL - 7
PB - Universitätsverlag Potsdam
CY - Potsdam
ER -
TY - JOUR
A1 - Kose, F.
A1 - Weckwerth, Wolfram
A1 - Linke, Thomas
A1 - Fiehn, Oliver
T1 - Visualizing plant metabolomic correlation networks using clique-metabolite matrices
Y1 - 2001
ER -
TY - JOUR
A1 - Sun, Fu
A1 - Dong, Kang
A1 - Osenberg, Markus
A1 - Hilger, Andre
A1 - Risse, Sebastian
A1 - Lu, Yan
A1 - Kamm, Paul H.
A1 - Klaus, Manuela
A1 - Markoetter, Henning
A1 - Garcia-Moreno, Francisco
A1 - Arlt, Tobias
A1 - Manke, Ingo
T1 - Visualizing the morphological and compositional evolution of the interface of InLi-anode|thio-LISION electrolyte in an all-solid-state Li-S cell by in operando synchrotron X-ray tomography and energy dispersive diffraction
JF - Journal of materials chemistry : A, Materials for energy and sustainability
N2 - Dynamic and direct visualization of interfacial evolution is helpful in gaining fundamental knowledge of all-solid-state-lithium battery working/degradation mechanisms and clarifying future research directions for constructing next-generation batteries. Herein, in situ and in operando synchrotron X-ray tomography and energy dispersive diffraction were simultaneously employed to record the morphological and compositional evolution of the interface of InLi-anode|sulfide-solid-electrolyte during battery cycling. Compelling morphological evidence of interfacial degradation during all-solid-state-lithium battery operation has been directly visualized by tomographic measurement. The accompanying energy dispersive diffraction results agree well with the observed morphological deterioration and the recorded electrochemical performance. It is concluded from the current investigation that a fundamental understanding of the phenomena occurring at the solid-solid electrode|electrolyte interface during all-solid-state-lithium battery cycling is critical for future progress in cell performance improvement and may determine its final commercial viability.
Y1 - 2018
U6 - https://doi.org/10.1039/c8ta08821g
SN - 2050-7488
SN - 2050-7496
VL - 6
IS - 45
SP - 22489
EP - 22496
PB - Royal Society of Chemistry
CY - Cambridge
ER -
TY - JOUR
A1 - Yan, Ming
T1 - Visually complex foveal words increase the amount of parafoveal information acquired
JF - Vision research : an international journal for functional aspects of vision.
N2 - This study investigates the effect of foveal load (i.e., processing difficulty of currently fixated words) on parafoveal information processing. Contrary to the commonly accepted view that high foveal load leads to reduced parafoveal processing efficiency, results of the present study showed that increasing foveal visual (but not linguistic) processing load actually increased the amount of parafoveal information acquired, presumably due to the fact that longer fixation duration on the pretarget word provided more time for parafoveal processing of the target word. It is therefore proposed in the present study that foveal linguistic processing load is not the only factor that determines parafoveal processing; preview time (afforded by foveal word visual processing load) may jointly influence parafoveal processing. (C) 2015 Elsevier Ltd. All rights reserved.
KW - Reading
KW - Eye movements
KW - Parafoveal processing
KW - Chinese
Y1 - 2015
U6 - https://doi.org/10.1016/j.visres.2015.03.025
SN - 0042-6989
SN - 1878-5646
VL - 111
SP - 91
EP - 96
PB - Elsevier
CY - Oxford
ER -
TY - JOUR
A1 - Awad, Ahmed Mahmoud Hany Aly
A1 - Weidlich, Matthias
A1 - Weske, Mathias
T1 - Visually specifying compliance rules and explaining their violations for business processes
JF - Journal of visual languages and computing
N2 - A business process is a set of steps designed to be executed in a certain order to achieve a business value. Such processes are often driven by and documented using process models. Nowadays, process models are also applied to drive process execution. Thus, correctness of business process models is a must. Much of the work has been devoted to check general, domain-independent correctness criteria, such as soundness. However, business processes must also adhere to and show compliance with various regulations and constraints, the so-called compliance requirements. These are domain-dependent requirements.
In many situations, verifying compliance on a model level is of great value, since violations can be resolved in an early stage prior to execution. However, this calls for using formal verification techniques, e.g., model checking, that are too complex for business experts to apply. In this paper, we utilize a visual language. BPMN-Q to express compliance requirements visually in a way similar to that used by business experts to build process models. Still, using a pattern based approach, each BPMN-Qgraph has a formal temporal logic expression in computational tree logic (CTL). Moreover, the user is able to express constraints, i.e., compliance rules, regarding control flow and data flow aspects. In order to provide valuable feedback to a user in case of violations, we depend on temporal logic querying approaches as well as BPMN-Q to visually highlight paths in a process model whose execution causes violations.
KW - Business process modeling
KW - Compliance checking
KW - Visual modeling
KW - Anti-patterns
Y1 - 2011
U6 - https://doi.org/10.1016/j.jvlc.2010.11.002
SN - 1045-926X
VL - 22
IS - 1
SP - 30
EP - 55
PB - Elsevier
CY - London
ER -
TY - JOUR
A1 - Schweigert, Florian J.
A1 - Raila, Jens
A1 - Haebel, Sophie
T1 - Vitamin A excreted in the urine of canines is associated with a Tamm-Horsfall-like Glycoprotein
Y1 - 1998
ER -
TY - JOUR
A1 - Schweigert, Florian J.
A1 - Bok, V.
T1 - Vitamin A in blood plasma and urine of dogs is affected by the dietary level of vitamin A
Y1 - 2000
ER -
TY - JOUR
A1 - Henze, Andrea
A1 - Raila, Jens
A1 - Kempf, Caroline
A1 - Reinke, Petra
A1 - Sefrin, Anett
A1 - Querfeld, Uwe
A1 - Schweigert, Florian J.
T1 - Vitamin A metabolism is changed in donors after living-kidney transplantation an observational study
JF - Lipids in health and disease
N2 - Background: The kidneys are essential for the metabolism of vitamin A (retinol) and its transport proteins retinol-binding protein 4 (RBP4) and transthyretin. Little is known about changes in serum concentration after living donor kidney transplantation (LDKT) as a consequence of unilateral nephrectomy; although an association of these parameters with the risk of cardiovascular diseases and insulin resistance has been suggested. Therefore we analyzed the concentration of retinol, RBP4, apoRBP4 and transthyretin in serum of 20 living-kidney donors and respective recipients at baseline as well as 6 weeks and 6 months after LDKT.
Results: As a consequence of LDKT, the kidney function of recipients was improved while the kidney function of donors was moderately reduced within 6 weeks after LDKT. With regard to vitamin A metabolism, the recipients revealed higher levels of retinol, RBP4, transthyretin and apoRBP4 before LDKT in comparison to donors. After LDKT, the levels of all four parameters decreased in serum of the recipients, while retinol, RBP4 as well as apoRBP4 serum levels of donors increased and remained increased during the follow-up period of 6 months.
Conclusion: LDKT is generally regarded as beneficial for allograft recipients and not particularly detrimental for the donors. However, it could be demonstrated in this study that a moderate reduction of kidney function by unilateral nephrectomy, resulted in an imbalance of components of vitamin A metabolism with a significant increase of retinol and RBP4 and apoRBP4 concentration in serum of donors.
KW - Donors
KW - glomerular filtration rate
KW - kidney transplantation
KW - retinol
KW - retinol-binding protein 4
KW - transthyretin
Y1 - 2011
U6 - https://doi.org/10.1186/1476-511X-10-231
SN - 1476-511X
VL - 10
IS - 23
PB - BioMed Central
CY - London
ER -
TY - JOUR
A1 - Schweigert, Florian J.
A1 - Klinger, Jeannine
A1 - Hurtienne, Andrea
A1 - Zunft, Hans-Joachim Franz
T1 - Vitamin A, carotenoid and vitamin E plasma concentrations in children from Laos in relation to sex and growth failure
Y1 - 2003
UR - http://www.nutritionj.com/content/2/1/17
ER -
TY - JOUR
A1 - Danquah, Ina
A1 - Dobrucky, C. Lydia
A1 - Frank, Laura K.
A1 - Henze, Andrea
A1 - Amoako, Yaw A.
A1 - Bedu-Addo, George
A1 - Raila, Jens
A1 - Schulze, Matthias Bernd
A1 - Mockenhaupt, Frank P.
A1 - Schweigert, Florian J.
T1 - Vitamin A: potential misclassification of vitamin A status among patients with type 2 diabetes and hypertension in urban Ghana
JF - The American journal of clinical nutrition : a publication of the American Society for Nutrition, Inc.
N2 - Background: Sub-Saharan Africa is facing a double burden of malnutrition: vitamin A deficiency (VAD) prevails, whereas the nutrition-related chronic conditions type 2 diabetes (T2D) and hypertension are emerging. Serum retinol a VAD marker increases in kidney disease and decreases in inflammation, which can partly be attributed to alterations in the vitamin A transport proteins retinol-binding protein 4 (RBP4) and prealbumin. Kidney dysfunction and inflammation commonly accompany T2D and hypertension.
Objective: Among urban Ghanaians, we investigated the associations of T2D and hypertension with serum retinol as well as the importance of kidney function and inflammation in this regard.
Design: A hospital-based, case-control study in individuals for risk factors of T2D, hypertension, or both was conducted in Kumasi, Ghana (328 controls, 197 with T2D, 354 with hypertension, and 340 with T2D plus hypertension). In 1219 blood samples, serum retinol, RBP4, and prealbumin were measured. Urinary albumin and estimated glomerular filtration rate (eGFR) defined kidney function. C-reactive protein (CRP) >5 mg/L indicated inflammation. We identified associations of T2D and hypertension with retinol by linear regression and calculated the contribution of RBP4, prealbumin, urinary albumin, eGFR, and CRP to these associations as the percentages of the explained variance of retinol.
Results: VAD (retinol <1.05 mu mol/L) was present in 10% of this predominantly female, middle-aged, overweight, and deprived population. Hypertension, but not T2D, was positively associated with retinol (beta: 0.12; 95% CI: 0.08, 0,17), adjusted for age, sex, socioeconomic factors, anthropometric measurements, and lifestyle. In addition to RBP4 (72%) and prealbumin (22%), the effect of increased retinol on individuals with hypertension was mainly attributed to impaired kidney function (eGFR: 30%; urinary albumin: 5%) but not to inflammation.
Conclusions: In patients with hypertension, VAD might be underestimated because of increased serum retinol in the context of kidney dysfunction. Thus, the interpretation of serum retinol in sub-Saharan Africa should account for hypertension status.
KW - hypertension
KW - inflammation
KW - kidney dysfunction
KW - type 2 diabetes
KW - vitamin A deficiency
Y1 - 2015
U6 - https://doi.org/10.3945/ajcn.114.101345
SN - 0002-9165
SN - 1938-3207
VL - 102
IS - 1
SP - 207
EP - 214
PB - American Society for Nutrition, Inc.
CY - Bethesda
ER -
TY - JOUR
A1 - Gerecke, Christian
A1 - Schumacher, Fabian
A1 - Berndzen, Alide
A1 - Homann, Thomas
A1 - Kleuser, Burkhard
T1 - Vitamin C in combination with inhibition of mutant IDH1 synergistically activates TET enzymes and epigenetically modulates gene silencing in colon cancer cells
JF - Epigenetics : the official journal of the DNA Methylation Society
N2 - Mutations in the enzyme isocitrate dehydrogenase 1 (IDH1) lead to metabolic alterations and a sustained formation of 2-hydroxyglutarate (2-HG). 2-HG is an oncometabolite as it inhibits the activity of alpha-ketoglutarate-dependent dioxygenases such as ten-eleven translocation (TET) enzymes. Inhibitors of mutant IDH enzymes, like ML309, are currently tested in order to lower the levels of 2-HG. Vitamin C (VC) is an inducer of TET enzymes. To test a new therapeutic avenue of synergistic effects, the anti-neoplastic activity of inhibition of mutant IDH1 via ML309 in the presence of VC was investigated in the colon cancer cell line HCT116 IDH1(R132H/+) (harbouring a mutated IDH1 allele) and the parental cells HCT116 IDH1(+/+) (wild type IDH1). Measurement of the oncometabolite indicated a 56-fold higher content of 2-HG in mutated cells compared to wild type cells. A significant reduction of 2-HG was observed in mutated cells after treatment with ML 309, whereas VC produced only minimally changes of the oncometabolite. However, combinatorial treatment with both, ML309 and VC, in mutated cells induced pronounced reduction of 2-HG leading to levels comparable to those in wild type cells. The decreased level of 2-HG in mutated cells after combinatorial treatment was accompanied by an enhanced global DNA hydroxymethylation and an increased gene expression of certain tumour suppressors. Moreover, mutated cells showed an increased percentage of apoptotic cells after treatment with non-cytotoxic concentrations of ML309 and VC. These results suggest that combinatorial therapy is of interest for further investigation to rescue TET activity and treatment of IDH1/2 mutated cancers.
KW - Vitamin C
KW - epigenetics
KW - IDH1
KW - TET
KW - cancer cells
Y1 - 2019
U6 - https://doi.org/10.1080/15592294.2019.1666652
SN - 1559-2294
SN - 1559-2308
VL - 15
IS - 3
SP - 307
EP - 322
PB - Taylor & Francis Group
CY - Philadelphia
ER -
TY - INPR
A1 - Hocher, Berthold
A1 - Reichetzeder, Christoph
T1 - Vitamin D and cardiovascular risk in postmenopausal women how to translate preclinical evidence into benefit for patients
T2 - Kidney international : official journal of the International Society of Nephrology
N2 - Preclinical work indicates that calcitriol restores vascular function by normalizing the endothelial expression of cyclooxygenase-2 and thromboxane-prostanoid receptors in conditions of estrogen deficiency and thus prevents the thromboxane-prostanoid receptor activation-induced inhibition of nitric oxide synthase. Since endothelial dysfunction is a key factor in the pathogenesis of cardiovascular diseases, this finding may have an important translational impact. It provides a clear rationale to use endothelial function in clinical trials aiming to find the optimal dose of vitamin D for the prevention of cardiovascular events in postmenopausal women.
Y1 - 2013
U6 - https://doi.org/10.1038/ki.2013.139
SN - 0085-2538
VL - 84
IS - 1
SP - 9
EP - 11
PB - Nature Publ. Group
CY - New York
ER -
TY - THES
A1 - Schmiedchen, Bettina
T1 - Vitamin D and its linkage between chronic kidney disease and cardiovascular integrity
Y1 - 2014
ER -
TY - JOUR
A1 - Drechsler, Christiane
A1 - Pilz, Stefan
A1 - Obermayer-Pietsch, Barbara
A1 - Verduijn, Marion
A1 - Tomaschitz, Andreas
A1 - Krane, Vera
A1 - Espe, Katharina
A1 - Dekker, Friedo
A1 - Brandenburg, Vincent
A1 - Maerz, Winfried
A1 - Ritz, Eberhard
A1 - Wanner, Christoph
T1 - Vitamin D deficiency is associated with sudden cardiac death, combined cardiovascular events, and mortality in haemodialysis patients
N2 - Dialysis patients experience an excess mortality, predominantly of sudden cardiac death (SCD). Accumulating evidence suggests a role of vitamin D for myocardial and overall health. This study investigated the impact of vitamin D status on cardiovascular outcomes and fatal infections in haemodialysis patients. 25-hydroxyvitamin D [25(OH)D] was measured in 1108 diabetic haemodialysis patients who participated in the German Diabetes and Dialysis Study and were followed up for a median of 4 years. By Cox regression analyses, we determined hazard ratios (HR) for pre-specified, adjudicated endpoints according to baseline 25(OH)D levels: SCD (n = 146), myocardial infarction (MI, n = 174), stroke (n = 89), cardiovascular events (CVE, n = 414), death due to heart failure (n = 37), fatal infection (n = 111), and all- cause mortality (n = 545). Patients had a mean age of 66 +/- 8 years (54% male) and median 25(OH)D of 39 nmol/L (interquartile range: 28-55). Patients with severe vitamin D deficiency [25(OH)D of < 25 nmol/L] had a 3-fold higher risk of SCD compared with those with sufficient 25(OH)D levels > 75 nmol/L [HR: 2.99, 95% confidence interval (CI): 1.39- 6.40]. Furthermore, CVE and all-cause mortality were strongly increased (HR: 1.78, 95% CI: 1.18-2.69, and HR: 1.74, 95% CI: 1.22-2.47, respectively), all persisting in multivariate models. There were borderline non-significant associations with stroke and fatal infection while MI and deaths due to heart failure were not meaningfully affected. Severe vitamin D deficiency was strongly associated with SCD, CVE, and mortality, and there were borderline associations with stroke and fatal infection. Whether vitamin D supplementation decreases adverse outcomes requires further evaluation.
Y1 - 2010
UR - http://eurheartj.oxfordjournals.org/
U6 - https://doi.org/10.1093/eurheartj/ehq246
SN - 0195-668X
ER -
TY - JOUR
A1 - Hocher, Berthold
A1 - Groen, Hans Jürgen
A1 - Schumann, Claudia
A1 - Tsuprykov, Oleg
A1 - Seifert, Susanne
A1 - Hitzler, Walter E.
A1 - Armbruster, Franz Paul
T1 - Vitamin D status from dried capillary blood samples
JF - Clinical laboratory : the peer reviewed journal for clinical laboratories and laboratories related to blood transfusion
N2 - Background: Given the huge impact of vitamin D deficiency on a broad spectrum of diseases such as rickets, osteoporosis, mineral bone disease-vascular calcification syndrome, infectious diseases, but also several types of cancer and CNS diseases, reliable and simple methods to analyze the vitamin D status are urgently needed.
Methods: We developed an easy technique to determine the 25-OH vitamin D status from dried blood samples on filter paper. This allows determination of the 25-OH vitamin D status independently of venous blood taking, since only sampling of capillary blood is required for this new method. We compared the results of vitamin D measurements from venous blood of 96 healthy blood donors with those from capillary blood taken from the same patients at the same time. The capillary blood was dried on filter paper using the D-Vital ID dry-blood collection system.
Results: 25-OH vitamin D concentration data from extracted dried capillary blood filters correlated very well with data obtained after direct measurement of venous blood samples of the same blood donor (R: 0.7936; p<0.0001). The correlation was linear over the whole range of 25-OH vitamin D concentrations seen in this study. A Bland-Altman plot revealed good agreement between both tests.
Conclusions: The D-Vital ID dry-blood collection system showed an excellent performance as compared to the classical way of 25-OH vitamin D measurement from venous blood. This new technique will facilitate easy and reliable measurement for vitamin D status, in particular, in rural or isolated areas, developing countries, and field studies.
KW - 25-OH vitamin D
KW - filter paper
KW - capillary blood
KW - new analysis method
Y1 - 2012
U6 - https://doi.org/10.7754/Clin.Lab.2012.120429
SN - 1433-6510
VL - 58
IS - 7-8
SP - 851
EP - 855
PB - Clin Lab Publ., Verl. Klinisches Labor
CY - Heidelberg
ER -
TY - JOUR
A1 - Karuwanarint, Piyaporn
A1 - Phonrat, Benjaluck
A1 - Tungtrongchitr, Anchalee
A1 - Suriyaprom, Kanjana
A1 - Chuengsamarn, Somlak
A1 - Schweigert, Florian J.
A1 - Tungtrongchitr, Rungsunn
T1 - Vitamin D-binding protein and its polymorphisms as a predictor for metabolic syndrome
JF - Biomarkers in medicine
N2 - Aim: To investigate the relationship of vitamin D-binding protein (GC) and genetic variation of GC (rs4588, rs7041 and rs2282679) with metabolic syndrome (MetS) in the Thai population. Materials & methods: GCglobulin concentrations were measured by quantitative western blot analysis in 401 adults. All participants were genotyped using TaqMan allelic discrimination assays. Results: GC-globulin levels were significatly lower in MetS subjects than in control subjects, in which significant negative correlations of GC-globulin levels with systolic blood pressure, glucose and age were found. Male participants who carried the GT genotype for rs4588 showed an increased risk of MetS compared with the GG wild-type (odds ratio: 3.25; p = 0.004). Conclusion: GC-globulin concentrations and variation in GC rs4588 were supported as a risk factor for MetS in Thais.
KW - GC gene
KW - GC-globulin
KW - metabolic syndrome
KW - polymorphism
KW - Thai population
KW - vitamin D-binding protein
Y1 - 2018
U6 - https://doi.org/10.2217/bmm-2018-0029
SN - 1752-0363
SN - 1752-0371
VL - 12
IS - 5
SP - 465
EP - 473
PB - Future Medicine
CY - London
ER -
TY - JOUR
A1 - Mittal, Rupal
A1 - Porcas, Richard
A1 - Wucknitz, Olaf
A1 - Biggs, Andy D.
A1 - Browne, Ian W. A.
T1 - VLBI phase-reference observations of the gravitational lens JVAS B0218+357
N2 - We present the results of phase-referenced VLBA+Effelsberg observations at five frequencies of the double-image gravitational lens WAS B0218+357, made to establish the precise registration of the A and B lensed image positions. The motivation behind these observations is to investigate the anomalous variation of the image flux-density ratio (A[B) with frequency - this ratio changes by almost a factor of two over a frequency range from 1.65 GHz to 15.35 GHz. We investigate whether frequency dependent image positions, combined with a magnification gradient across the image field, could give rise to the anomaly. Our observations confirm the variation of image flux-density ratio with frequency. The results from Our phase-reference astrometry, taken together with the lens mass model of Wucknitz et al. (2004, MNRAS, 349, 14), show that shifts of the image peaks and centroids are too small to account for the observed frequency- dependent ratio
Y1 - 2006
UR - http://www.edpsciences.org/docinfos/AAS/
U6 - https://doi.org/10.1051/0004-6361:20054012
ER -
TY - JOUR
A1 - Bonnet, Philippe
A1 - Dong, Xin Luna
A1 - Naumann, Felix
A1 - Tözün, Pınar
T1 - VLDB 2021
BT - Designing a hybrid conference
JF - SIGMOD record
N2 - The 47th International Conference on Very Large Databases (VLDB'21) was held on August 16-20, 2021 as a hybrid conference. It attracted 180 in-person attendees in Copenhagen and 840 remote attendees. In this paper, we describe our key decisions as general chairs and program committee chairs and share the lessons we learned.
Y1 - 2021
U6 - https://doi.org/10.1145/3516431.3516447
SN - 0163-5808
SN - 1943-5835
VL - 50
IS - 4
SP - 50
EP - 53
PB - Association for Computing Machinery
CY - New York
ER -
TY - JOUR
A1 - Westphal, Florian
A1 - Axelsson, Stefan
A1 - Neuhaus, Christian
A1 - Polze, Andreas
T1 - VMI-PL: A monitoring language for virtual platforms using virtual machine introspection
JF - Digital Investigation : the international journal of digital forensics & incident response
N2 - With the growth of virtualization and cloud computing, more and more forensic investigations rely on being able to perform live forensics on a virtual machine using virtual machine introspection (VMI). Inspecting a virtual machine through its hypervisor enables investigation without risking contamination of the evidence, crashing the computer, etc. To further access to these techniques for the investigator/researcher we have developed a new VMI monitoring language. This language is based on a review of the most commonly used VMI-techniques to date, and it enables the user to monitor the virtual machine's memory, events and data streams. A prototype implementation of our monitoring system was implemented in KVM, though implementation on any hypervisor that uses the common x86 virtualization hardware assistance support should be straightforward. Our prototype outperforms the proprietary VMWare VProbes in many cases, with a maximum performance loss of 18% for a realistic test case, which we consider acceptable. Our implementation is freely available under a liberal software distribution license. (C) 2014 Digital Forensics Research Workshop. Published by Elsevier Ltd. All rights reserved.
KW - Virtualization
KW - Security
KW - Monitoring language
KW - Live forensics
KW - Introspection
KW - Classification
Y1 - 2014
U6 - https://doi.org/10.1016/j.diin.2014.05.016
SN - 1742-2876
SN - 1873-202X
VL - 11
SP - S85
EP - S94
PB - Elsevier
CY - Oxford
ER -
TY - JOUR
A1 - Tenenboim, Hezi
A1 - Smirnova, Julia
A1 - Willmitzer, Lothar
A1 - Steup, Martin
A1 - Brotman, Yariv
T1 - VMP1-deficient Chlamydomonas exhibits severely aberrant cell morphology and disrupted cytokinesies
JF - BMC plant biology
N2 - Background: The versatile Vacuole Membrane Protein 1 (VMP1) has been previously investigated in six species. It has been shown to be essential in macroautophagy, where it takes part in autophagy initiation. In addition, VMP1 has been implicated in organellar biogenesis; endo-, exo- and phagocytosis, and protein secretion; apoptosis; and cell adhesion. These roles underly its proven involvement in pancreatitis, diabetes and cancer in humans.
Results: In this study we analyzed a VMP1 homologue from the green alga Chlamydomonas reinhardtii. CrVMP1 knockdown lines showed severe phenotypes, mainly affecting cell division as well as the morphology of cells and organelles. We also provide several pieces of evidence for its involvement in macroautophagy.
KW - VMP1
KW - Autophagy
KW - Cytokinesis
Y1 - 2014
U6 - https://doi.org/10.1186/1471-2229-14-121
SN - 1471-2229
VL - 14
PB - BioMed Central
CY - London
ER -
TY - JOUR
A1 - Rubertus, Elina
A1 - Noiray, Aude
T1 - Vocalic activation width decreases across childhood
BT - Evidence from carryover coarticulation
JF - Laboratory Phonology
N2 - This study is the first to use kinematic data to assess lingual carryover coarticulation in children. We investigated whether the developmental decrease previously attested in anticipatory coarticulation, as well as the relation between coarticulatory degree and the consonantal context, also characterize carryover coarticulation. Sixty-two children and 13 adults, all native speakers of German, were recruited according to five age cohorts: three-year-olds, four-year-olds, five-year-olds, seven-year-olds, and adults. Tongue movements during the production of ə.CV.Cə utterances (C = /b, d, g/, V = /i, y, e, a, o, u/) were recorded with ultrasound. We measured vowel-induced horizontal displacement of the tongue dorsum within the last syllable and compared the resulting coarticulatory patterns between age cohorts and consonantal contexts. Results indicate that the degree of vocalic carryover coarticulation decreases with age. Vocalic prominence within an utterance as well as its change across childhood depended on the postvocalic consonant’s articulatory demands for the tongue dorsum (i.e., its coarticulatory resistance): Low resistant /b/ and /g/ allowed for more vocalic perseveration and a continuous decrease, while the highly resistant /d/ displayed lower coarticulation degrees and discontinuous effects. These findings parallel those in anticipation suggesting a similar organization of anticipatory and carryover coarticulation. Implications for theories of speech production are discussed.
KW - language acquisition
KW - coarticulation
KW - carryover effects
KW - vowels
KW - gestural organization
KW - speech motor control
Y1 - 2020
U6 - https://doi.org/10.5334/labphon.228
SN - 1868-6346
SN - 1868-6354
VL - 11
IS - 1
PB - de Gruyter Mouton
CY - Berlin, New York
ER -
TY - JOUR
A1 - Hansch, Petra
A1 - Wallschläger, Hans-Dieter
T1 - Vocalisation of curassows (Cracidae)
Y1 - 1996
ER -
TY - JOUR
A1 - Vock, Miriam
A1 - Köller, Olaf
A1 - Nagy, Gabriel
T1 - Vocational interests of intellectually gifted and highly achieving young adults
JF - British journal of educational psychology
N2 - Background.Vocational interests play a central role in the vocational decision-making process and are decisive for the later job satisfaction and vocational success. Based on Ackerman's (1996) notion of trait complexes, specific interest profiles of gifted high-school graduates can be expected. Aims.Vocational interests of gifted and highly achieving adolescents were compared to those of their less intelligent/achieving peers according to Holland's (1997) RIASEC model. Further, the impact of intelligence and achievement on interests were analysed while statistically controlling for potentially influencing variables. Changes in interests over time were investigated. Sample.N= 4,694 German students (age: M= 19.5, SD= .80; 54.6% females) participated in the study (TOSCA; Koller, Watermann, Trautwein, & Ludtke, 2004). Method. Interests were assessed in participants' final year at school and again 2 years later (N= 2,318). Results.Gifted participants reported stronger investigative and realistic interests, but lower social interests than less intelligent participants. Highly achieving participants reported higher investigative and (in wave 2) higher artistic interests. Considerable gender differences were found: gifted girls had a flat interest profile, while gifted boys had pronounced realistic and investigative and low social interests. Multilevel multiple regression analyses predicting interests by intelligence and school achievement revealed stable interest profiles. Beyond a strong gender effect, intelligence and school achievement each contributed substantially to the prediction of vocational interests. Conclusions.At the time around graduation from high school, gifted young adults show stable interest profiles, which strongly differ between gender and intelligence groups. These differences are relevant for programmes for the gifted and for vocational counselling.
Y1 - 2013
U6 - https://doi.org/10.1111/j.2044-8279.2011.02063.x
SN - 0007-0998
VL - 83
IS - 2
SP - 305
EP - 328
PB - Wiley-Blackwell
CY - Hoboken
ER -
TY - GEN
A1 - Salzwedel, Annett
A1 - Völler, Heinz
A1 - Reibis, Rona Katharina
T1 - Vocational reintegration in coronary heart disease patients - the holistic approach of the WHO biopsychosocial concept
T2 - European journal of preventive cardiology : the official ESC journal for primary & secondary cardiovascular prevention, rehabilitation and sports cardiology
Y1 - 2019
U6 - https://doi.org/10.1177/2047487319850699
SN - 2047-4873
SN - 2047-4881
VL - 26
IS - 13
SP - 1383
EP - 1385
PB - Sage Publ.
CY - London
ER -
TY - JOUR
A1 - Hecker, Pascal
A1 - Steckhan, Nico
A1 - Eyben, Florian
A1 - Schuller, Björn Wolfgang
A1 - Arnrich, Bert
T1 - Voice Analysis for Neurological Disorder Recognition – A Systematic Review and Perspective on Emerging Trends
JF - Frontiers in Digital Health
N2 - Quantifying neurological disorders from voice is a rapidly growing field of research and holds promise for unobtrusive and large-scale disorder monitoring. The data recording setup and data analysis pipelines are both crucial aspects to effectively obtain relevant information from participants. Therefore, we performed a systematic review to provide a high-level overview of practices across various neurological disorders and highlight emerging trends. PRISMA-based literature searches were conducted through PubMed, Web of Science, and IEEE Xplore to identify publications in which original (i.e., newly recorded) datasets were collected. Disorders of interest were psychiatric as well as neurodegenerative disorders, such as bipolar disorder, depression, and stress, as well as amyotrophic lateral sclerosis amyotrophic lateral sclerosis, Alzheimer's, and Parkinson's disease, and speech impairments (aphasia, dysarthria, and dysphonia). Of the 43 retrieved studies, Parkinson's disease is represented most prominently with 19 discovered datasets. Free speech and read speech tasks are most commonly used across disorders. Besides popular feature extraction toolkits, many studies utilise custom-built feature sets. Correlations of acoustic features with psychiatric and neurodegenerative disorders are presented. In terms of analysis, statistical analysis for significance of individual features is commonly used, as well as predictive modeling approaches, especially with support vector machines and a small number of artificial neural networks. An emerging trend and recommendation for future studies is to collect data in everyday life to facilitate longitudinal data collection and to capture the behavior of participants more naturally. Another emerging trend is to record additional modalities to voice, which can potentially increase analytical performance.
KW - neurological disorders
KW - voice
KW - speech
KW - everyday life
KW - multiple modalities
KW - machine learning
KW - disorder recognition
Y1 - 2022
U6 - https://doi.org/10.3389/fdgth.2022.842301
SN - 2673-253X
PB - Frontiers Media SA
CY - Lausanne, Schweiz
ER -
TY - JOUR
A1 - Tristram, Hildegard L. C.
T1 - Voice and Poetry in Dylan Thomas
Y1 - 1996
ER -
TY - JOUR
A1 - Mumm, Rebekka
A1 - Hermanussen, Michael
A1 - Scheffler, Christiane
T1 - voice break as the marker of biological age
JF - Acta paediatrica : nurturing the child
N2 - Aim: We aimed to develop the first references for body height, body weight and body mass index (BMI) for boys based on the individual developmental tempo with respect to their voice break status. Methods: We re-analysed data from the German Health Interview and Examination Survey for Children and Adolescents (KiGGS study) on body height, body weight and body mass index based on the voice break, or mutation, in 3956 boys aged 10-17 years. We used the LMS method to construct smoothed references centiles for the studied variables in premutational, mutational and postmutational boys. Results: Body height, body weight and BMI differed significantly (p < 0.001) between the different stages of voice break. On average, boys were 5.9 cm taller, 5.8 kg heavier and had a 0.7 kg/m(2) higher BMI with every higher stage of voice break. Currently used growth references for chronological age in comparison with maturity-related references led to an average of 5.4% of boys being falsely classified as overweight.
KW - Body mass index
KW - Developmental tempo
KW - Growth reference values
KW - Overweight
KW - Voice break
Y1 - 2016
U6 - https://doi.org/10.1111/apa.13488
SN - 0803-5253
SN - 1651-2227
VL - 105
SP - e459
EP - e463
PB - Wiley-Blackwell
CY - Hoboken
ER -
TY - JOUR
A1 - Ermolina, Alena
A1 - Tiberius, Victor
T1 - Voice-controlled intelligent personal assistants in health care
BT - International Delphi Study
JF - Journal of medical internet research : international scientific journal for medical research, information and communication on the internet ; JMIR
N2 - Background: Voice-controlled intelligent personal assistants (VIPAs), such as Amazon Echo and Google Home, involve artificial intelligence-powered algorithms designed to simulate humans. Their hands-free interface and growing capabilities have a wide range of applications in health care, covering off-clinic education, health monitoring, and communication. However, conflicting factors, such as patient safety and privacy concerns, make it difficult to foresee the further development of VIPAs in health care.
Objective: This study aimed to develop a plausible scenario for the further development of VIPAs in health care to support decision making regarding the procurement of VIPAs in health care organizations. Methods: We conducted a two-stage Delphi study with an internationally recruited panel consisting of voice assistant experts, medical professionals, and representatives of academia, governmental health authorities, and nonprofit health associations having expertise with voice technology. Twenty projections were formulated and evaluated by the panelists. Descriptive statistics were used to derive the desired scenario.
Results: The panelists expect VIPAs to be able to provide solid medical advice based on patients' personal health information and to have human-like conversations. However, in the short term, voice assistants might neither provide frustration-free user experience nor outperform or replace humans in health care. With a high level of consensus, the experts agreed with the potential of VIPAs to support elderly people and be widely used as anamnesis, informational, self-therapy, and communication tools by patients and health care professionals. Although users' and governments' privacy concerns are not expected to decrease in the near future, the panelists believe that strict regulations capable of preventing VIPAs from providing medical help services will not be imposed.
Conclusions: According to the surveyed experts, VIPAs will show notable technological development and gain more user trust in the near future, resulting in widespread application in health care. However, voice assistants are expected to solely support health care professionals in their daily operations and will not be able to outperform or replace medical staff.
KW - Delphi study
KW - medical informatics
KW - voice-controlled intelligent personal
KW - assistants
KW - internet of things
KW - smart devices
Y1 - 2020
U6 - https://doi.org/10.2196/25312
SN - 1438-8871
VL - 23
IS - 4
PB - Healthcare World
CY - Richmond, Va.
ER -
TY - JOUR
A1 - Gerhard, Reimund
T1 - Voided polymer electrets : new materials, new challenges, new chances
Y1 - 2002
SN - 0-7803-7560-2
ER -
TY - JOUR
A1 - Wegener, Michael
A1 - Bergweiler, Steffen
A1 - Wirges, Werner
A1 - Pucher, Andreas
A1 - Gerhard, Reimund
T1 - Voided space-charge electrets : piezoelectric transducer materials for electro-acoustic applications
Y1 - 2004
ER -
TY - THES
A1 - Arbabi-Bidgoli, Sepehr
T1 - Voids in the Large Scale Structure of the Universe
Y1 - 2003
ER -
TY - JOUR
A1 - Freundt, A.
A1 - Grevemeyer, I.
A1 - Rabbel, W.
A1 - Hansteen, T. H.
A1 - Hensen, C.
A1 - Wehrmann, H.
A1 - Kutterolf, S.
A1 - Halama, Ralf
A1 - Frische, M.
T1 - Volatile (H2O, CO2, Cl, S) budget of the Central American subduction zone
JF - International journal of earth sciences
N2 - After more than a decade of multidisciplinary studies of the Central American subduction zone mainly in the framework of two large research programmes, the US MARGINS program and the German Collaborative Research Center SFB 574, we here review and interpret the data pertinent to quantify the cycling of mineral-bound volatiles (H2O, CO2, Cl, S) through this subduction system. For input-flux calculations, we divide the Middle America Trench into four segments differing in convergence rate and slab lithological profiles, use the latest evidence for mantle serpentinization of the Cocos slab approaching the trench, and for the first time explicitly include subduction erosion of forearc basement. Resulting input fluxes are 40-62 (53) Tg/Ma/m H2O, 7.8-11.4 (9.3) Tg/Ma/m CO2, 1.3-1.9 (1.6) Tg/Ma/m Cl, and 1.3-2.1 (1.6) Tg/Ma/m S (bracketed are mean values for entire trench length). Output by cold seeps on the forearc amounts to 0.625-1.25 Tg/Ma/m H2O partly derived from the slab sediments as determined by geochemical analyses of fluids and carbonates. The major volatile output occurs at the Central American volcanic arc that is divided into ten arc segments by dextral strike-slip tectonics. Based on volcanic edifice and widespread tephra volumes as well as calculated parental magma masses needed to form observed evolved compositions, we determine long-term (10(5) years) average magma and K2O fluxes for each of the ten segments as 32-242 (106) Tg/Ma/m magma and 0.28-2.91 (1.38) Tg/Ma/m K2O (bracketed are mean values for entire Central American volcanic arc length). Volatile/K2O concentration ratios derived from melt inclusion analyses and petrologic modelling then allow to calculate volatile fluxes as 1.02-14.3 (6.2) Tg/Ma/m H2O, 0.02-0.45 (0.17) Tg/Ma/m CO2, and 0.07-0.34 (0.22) Tg/Ma/m Cl. The same approach yields long-term sulfur fluxes of 0.12-1.08 (0.54) Tg/Ma/m while present-day open-vent SO2-flux monitoring yields 0.06-2.37 (0.83) Tg/Ma/m S. Input-output comparisons show that the arc water fluxes only account for up to 40 % of the input even if we include an "invisible" plutonic component constrained by crustal growth. With 20-30 % of the H2O input transferred into the deeper mantle as suggested by petrologic modeling, there remains a deficiency of, say, 30-40 % in the water budget. At least some of this water is transferred into two upper-plate regions of low seismic velocity and electrical resistivity whose sizes vary along arc: one region widely envelopes the melt ascent paths from slab top to arc and the other extends obliquely from the slab below the forearc to below the arc. Whether these reservoirs are transient or steady remains unknown.
KW - Subduction input
KW - Forearc dewatering
KW - Arc magmatism
KW - Subduction fluids
Y1 - 2014
U6 - https://doi.org/10.1007/s00531-014-1001-1
SN - 1437-3254
SN - 1437-3262
VL - 103
IS - 7
SP - 2101
EP - 2127
PB - Springer
CY - New York
ER -
TY - THES
A1 - Stroncik, Nicole A.
T1 - Volatiles as tracers for mantle processes and magma formation and evolution
N2 - The geochemical composition of oceanic basalts provides us with a window into the distribution of geochemical elements within the Earth’s mantle in space and time. In conjunction with a throughout knowledge on how the different elements behave e.g. during melt formation and evolution or on their partition behaviour between e.g. minerals and melts this information has been transformed into various models on how oceanic crust is formed along plume influenced or normal mid-ocean ridge segments, how oceanic crust evolves in response to seawater, on subduction recycling of oceanic crust and so forth. The work presented in this habilitation was aimed at refining existing models, putting further constraints on some of the major open questions in this field of research while at the same time trying to increase our knowledge on the behaviour of noble gases as a tracer for melt formation and evolution processes. In the line of this work the author and her co-workers were able to answer one of the major questions concerning the formation of oceanic crust along plume-influenced ridges – in which physical state does the plume material enter the ridge? Based on submarine volcanic glass He, Ne and Ar data, the author and her co-workers have shown that the interaction of mantle plumes with mid-ocean ridges occurs in the physical form of melts. In addition, the author and her co-workers have also put further constraints on one of the major questions concerning the formation of oceanic crust along normal mid-ocean ridges – namely how is the mid-ocean ridge system effectively cooled to form the lower oceanic crust? Based on Ne and Ar data in combination with Cl/K ratios of basaltic glass from the Mid-Atlantic ridge and estimates of crystallisation pressures they have shown, that seawater penetration reaches lower crustal levels close to the Moho, indicating that hydrothermal circulation might be an effective cooling mechanism even for the deep parts of the oceanic crust. Considering subduction recycling, the heterogeneity of the Earth’s mantle and mantle dynamic processes the key question is on which temporal and spatial scales is the Earth’s mantle geochemically heterogeneous? In the line of this work the author along with her co-workers have shown based on Cl/K ratios in conjunction with the Sr, Nd, and Pb isotopes of the OIBs representing the type localities for the different mantle endmembers that the quantity of Cl recycled into the mantle via subduction is not uniform and that neither the HIMU nor the EM1 and EM2 mantle components can be considered as distinct mantle endmembers. In addition, we have shown, based on He, Ne and Ar isotope and trace-element data from the Foundation hotspot that the near ridge seamounts of the Foundation seamount chain formed by the Foundation hotspot erupt lavas with a trace-element signature clearly characteristic of oceanic gabbro which indicates the existence of recycled, virtually unchanged lower oceanic crust in the plume source. This is a clear sign of the inefficiency of the stirring mechanism existing at mantle depth. Similar features are seen in other near-axis hotspot magmas around the world. Based on He, Sr, Nd, Pb and O isotopes and trace elements in primitive mafic dykes from the Etendeka flood basalts, NW Namibia the author along with her co-workers have shown that deep, less degassed mantle material carried up by a mantle plume contributed significantly to the flood basalt magmatism. The Etendeka flood basalts are part of the South Atlantic LIP, which is associated with the breakup of Gondwana, the formation of the Paraná-Etendeka flood basalts and the Walvis Ridge - Tristan da Cunha hotspot track. Thus reinforcing the lately often-challenged concept of mantle plumes and the role of mantle plumes in the formation of large igneous provinces. Studying the behaviour of noble gases during melt formation and evolution the author along with her co-workers has shown that He can be considerable more susceptible to changes during melt formation and evolution resulting not only in a complete decoupling of He isotopes from e.g. Ne or Pb isotopes but also in a complete loss of the primary mantle isotope signal. They have also shown that this decoupling occurs mainly during the melt formation processes requiring He to be more compatible during mantle melting than Ne. In addition, the author along with her co workers were able to show that incorporation of atmospheric noble gases into igneous rocks is in general a two-step process: (1) magma contamination by assimilation of altered oceanic crust results in the entrainment of air-equilibrated seawater noble gases; (2) atmospheric noble gases are adsorbed onto grain surfaces during sample preparation. This implies, considering the ubiquitous presence of the contamination signal, that magma contamination by assimilation of a seawater-sourced component is an integral part of mid-ocean ridge basalt evolution.
KW - noble gases
KW - mantle formation
KW - mantle evolution
KW - ocean-crust formation
KW - plume-ridge interaction
KW - contamination processes
KW - magmatic processes
KW - continental break-up
Y1 - 2019
ER -
TY - BOOK
A1 - Farias, Fidel
T1 - Volatility transmission between the oil market and the financial market
T3 - Forschungsbericht
Y1 - 2011
SN - 978-3-9812422-8-7
VL - 0111
PB - Inst. für Makroökonomik
CY - Potsdam
ER -
TY - JOUR
A1 - Namiki, Atsuko
A1 - Rivalta, Eleonora
A1 - Woith, Heiko
A1 - Willey, Timothy
A1 - Parolai, Stefano
A1 - Walter, Thomas R.
T1 - Volcanic activities triggered or inhibited by resonance of volcanic edifices to large earthquakes
JF - Geology
N2 - The existence of a causal link between large earthquakes and volcanic unrest is widely accepted. Recent observations have also revealed counterintuitive negative responses of volcanoes to large earthquakes, including decreased gas emissions and subsidence in volcanic areas. In order to explore the mechanisms that could simultaneously explain both the positive and negative responses of volcanic activity to earthquakes, we here focus on the role played by topography. In the laboratory, we shook a volcanic edifice analogue, made of gel, previously injected with a buoyant fluid. We find that shaking triggers rapid migration of the buoyant fluid upward, downward, or laterally, depending on the fluid’s buoyancy and storage depth; bubbly fluids stored at shallow depth ascend, while low-buoyancy fluids descend or migrate laterally. The migration of fluids induced by shaking is two orders of magnitude faster than without shaking. Downward or lateral fluid migration may decrease volcanic gas emissions and cause subsidence as a negative response, while upward migration is consistent both with an increase in volcanic activity and immediate unrest (deformation and seismicity) after large earthquakes. The fluid migration is more efficient when the oscillation frequency is close to the resonance frequency of the edifice. The resonance frequency for a 30-km-wide volcanic mountain range, such as those where subsidence was observed, is ∼0.07 Hz. Only large earthquakes are able to cause oscillation at such low frequencies.
Y1 - 2018
U6 - https://doi.org/10.1130/G45323.1
SN - 0091-7613
SN - 1943-2682
VL - 47
IS - 1
SP - 67
EP - 70
PB - American Institute of Physics
CY - Boulder
ER -