TY - JOUR
A1 - Apanasewicz, Anna
A1 - Groth, Detlef
A1 - Scheffler, Christiane
A1 - Hermanussen, Michael
A1 - Piosek, Magdalena
A1 - Wychowaniec, Patrycja
A1 - Babiszewska, Magdalena
A1 - Barbarska, Olga
A1 - Ziomkiewicz, Anna
T1 - Traumatized women’s infants are bigger than children of mothers without traumas
JF - Journal of biological and clinical anthropology : Anthropologischer Anzeiger
N2 - Life history theory predicts that experiencing stress during the early period of life will result in accelerated growth and earlier maturation. Indeed, animal and some human studies documented a faster pace of growth in the offspring of stressed mothers. Recent advances in epigenetics suggest that the effects of early developmental stress might be passed across the generations. However, evidence for such intergenerational transmission is scarce, at least in humans. Here we report the results of the study investigating the association between childhood trauma in mothers and physical growth in their children during the first months of life. Anthropometric and psychological data were collected from 99 mothers and their exclusively breastfed children at the age of 5 months. The mothers completed the Early Life Stress Questionnaire to assess childhood trauma. The questionnaire includes questions about the most traumatic events that they had experienced before the age of 12 years. Infant growth was evaluated based on the anthropometric measurements of weight, length, and head circumference. Also, to control for the size of maternal investment, the composition of breast milk samples taken at the time of infant anthropometric measurements was investigated. The children of mothers with higher early life stress tended to have higher weight and bigger head circumference. The association between infant anthropometrics and early maternal stress was not affected by breast milk composition, suggesting that the effect of maternal stress on infant growth was independent of the size of maternal investment. Our results demonstrate that early maternal trauma may affect the pace of growth in the offspring and, in consequence, lead to a faster life history strategy. This effect might be explained via changes in offspring epigenetics.
KW - maternal trauma
KW - early life trauma
KW - breastfed infant development
KW - POLS
Y1 - 2020
U6 - https://doi.org/10.1127/anthranz/2020/1285
SN - 0003-5548
SN - 2363-7099
VL - 77
IS - 5
SP - 359
EP - 374
PB - Schweizerbart science publishers
CY - Stuttgart
ER -
TY - JOUR
A1 - Ansmann, Moritz
A1 - Seyfried, Markus
T1 - Zwischen Anspruch und Realität
BT - evidenzbasierte Qualitätsentwicklung durch Integration von Qualitätsmanagement und Hochschuldidaktik
JF - HDS.Journal
N2 - Eine evidenzbasierte Gestaltung von Studium und Lehre, wie sie heute normativ eingefordert wird, bedarf des integrierten Zusammenwirkens von Qualitätsmanagement und Hochschuldidaktik – aber gibt es dieses in der Praxis? Mit Blick auf die allgemeine Befundlage, aber auch anhand einer eigenen empirischen Untersuchung zeigt der Beitrag diesbezüglich auf, dass Qualitätsmanagement und Hochschuldidaktik als weitgehend desintegrierte Funktionsbereiche wahrgenommen werden und Evidenzbasierung in der Praxis folglich keinen sehr hohen Stellenwert genießt. Ausgehend von einer Ursachenanalyse wird auf die dysfunktionalen, aber auch auf die funktionalen Auswirkungen dieser Separierung aufmerksam gemacht.
KW - Qualitätsmanagement
KW - Qualitätssicherung
KW - Evidenzbasierung
KW - Organisationsforschung
KW - Zusammenarbeit
KW - quality management
KW - quality assurance
KW - evidence-based research
KW - organizational research
KW - collaboration
Y1 - 2020
UR - https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa2-725827
SN - 2195-0334
VL - 2020
IS - 1
SP - 6
EP - 11
PB - Hochschuldidaktisches Zentrum Sachsen (HDS)
CY - Leipzig
ER -
TY - JOUR
A1 - Angerer, Marie-Luise
T1 - No Stopping Points Anymore
BT - am Beispiel des Films Annihilation und anderer Geschichten
JF - Feministisches Spekulieren : Genealogien, Narrationen, Zeitlichkeiten
Y1 - 2020
SN - 978-3-86599-446-2
SP - 96
EP - 108
PB - Kulturverlag Kadmos
CY - Berlin
ER -
TY - JOUR
A1 - Angelopoulos, Michael
A1 - Overduin, Pier Paul
A1 - Westermann, Sebastian
A1 - Tronicke, Jens
A1 - Strauss, Jens
A1 - Schirrmeister, Lutz
A1 - Biskaborn, Boris
A1 - Liebner, Susanne
A1 - Maksimov, Georgii
A1 - Grigoriev, Mikhail N.
A1 - Grosse, Guido
T1 - Thermokarst lake to lagoon transitions in Eastern Siberia
BT - do submerged taliks refreeze?
JF - Journal of geophysical research : Earth surface
N2 - As the Arctic coast erodes, it drains thermokarst lakes, transforming them into lagoons, and, eventually, integrates them into subsea permafrost. Lagoons represent the first stage of a thermokarst lake transition to a marine setting and possibly more saline and colder upper boundary conditions. In this research, borehole data, electrical resistivity surveying, and modeling of heat and salt diffusion were carried out at Polar Fox Lagoon on the Bykovsky Peninsula, Siberia. Polar Fox Lagoon is a seasonally isolated water body connected to Tiksi Bay through a channel, leading to hypersaline waters under the ice cover. The boreholes in the center of the lagoon revealed floating ice and a saline cryotic bed underlain by a saline cryotic talik, a thin ice-bearing permafrost layer, and unfrozen ground. The bathymetry showed that most of the lagoon had bedfast ice in spring. In bedfast ice areas, the electrical resistivity profiles suggested that an unfrozen saline layer was underlain by a thick layer of refrozen talik. The modeling showed that thermokarst lake taliks can refreeze when submerged in saltwater with mean annual bottom water temperatures below or slightly above 0 degrees C. This occurs, because the top-down chemical degradation of newly formed ice-bearing permafrost is slower than the refreezing of the talik. Hence, lagoons may precondition taliks with a layer of ice-bearing permafrost before encroachment by the sea, and this frozen layer may act as a cap on gas migration out of the underlying talik.
KW - thermokarst lake
KW - talik
KW - lagoon
KW - subsea permafrost
KW - salt diffusion
KW - Siberia
Y1 - 2020
U6 - https://doi.org/10.1029/2019JF005424
SN - 2169-9003
SN - 2169-9011
VL - 125
IS - 10
PB - American Geophysical Union
CY - Washington
ER -
TY - JOUR
A1 - Andresen, Lea
T1 - Fortgeschrittenenklausur – Öffentliches Recht
BT - Kommunalrecht – Wolfsfreie Zone
JF - Juristische Schulung
Y1 - 2020
SN - 0022-6939
VL - 60
IS - 7
SP - 656
EP - 660
PB - C.H. Beck
CY - München
ER -
TY - JOUR
A1 - Amen, Rahma
A1 - Nagel, Rebecca
A1 - Hedt, Maximilian
A1 - Kirschbaum, Frank
A1 - Tiedemann, Ralph
T1 - Morphological differentiation in African weakly electric fish (genus Campylomormyrus) relates to substrate preferences
JF - Evolutionary Ecology
N2 - Under an ecological speciation scenario, the radiation of African weakly electric fish (genus Campylomormyrus) is caused by an adaptation to different food sources, associated with diversification of the electric organ discharge (EOD). This study experimentally investigates a phenotype-environment correlation to further support this scenario. Our behavioural experiments showed that three sympatric Campylomormyrus species with significantly divergent snout morphology differentially react to variation in substrate structure. While the short snout species (C. tamandua) exhibits preference to sandy substrate, the long snout species (C. rhynchophorus) significantly prefers a stone substrate for feeding. A third species with intermediate snout size (C. compressirostris) does not exhibit any substrate preference. This preference is matched with the observation that long-snouted specimens probe deeper into the stone substrate, presumably enabling them to reach prey more distant to the substrate surface. These findings suggest that the diverse feeding apparatus in the genus Campylomormyrus may have evolved in adaptation to specific microhabitats, i.e., substrate structures where these fish forage. Whether the parallel divergence in EOD is functionally related to this adaptation or solely serves as a prezygotic isolation mechanism remains to be elucidated.
KW - ecological speciation
KW - feeding behaviour
KW - electric fish
KW - trophic apparatus
KW - evolutionary ecology
Y1 - 2020
U6 - https://doi.org/10.1007/s10682-020-10043-3
SN - 0269-7653
SN - 1573-8477
VL - 34
IS - 3
SP - 427
EP - 437
PB - Springer Science
CY - Dordrecht
ER -
TY - JOUR
A1 - Ambühl, Annemarie
ED - Ambühl, Annemarie
T1 - Vorwort: tessellae
JF - thersites 11: tessellae – Birthday Issue for Christine Walde
N2 - Prolegomena to thersites 11, "tessellae – Birthday Issue for Christine Walde"
Y1 - 2020
U6 - https://doi.org/10.34679/thersites.vol11.185
SN - 2364-7612
VL - 2020
IS - 11
SP - i
EP - vi
ER -
TY - JOUR
A1 - Amatuzzi, Antonella
A1 - Ayres-Bennett, Wendy
A1 - Gerstenberg, Annette
A1 - Schosler, Lene
A1 - Skupien-Dekens, Carine
T1 - Changement linguistique et périodisation du français (pré)classique
BT - deux études de cas à partir des corpus du RCFC
JF - Journal of French language studies
N2 - RESUME Cette etude propose d'explorer et d'identifier des moments particuliers oU le changement linguistique se produit, afin de confirmer ou de rejeter l'idee d'une periode specifique designee par le terme << francais preclassique >>, avec une rupture - ou frontiere chronolectale - detectable autour de 1630 (cf. Ayres-Bennett et Caron, 2016). Afin de verifier dans quelle mesure cette chronologie peut etre confirmee, il est necessaire de multiplier des analyses fines et pointues sur des traits linguistiques qui ont subi des changements a l'epoque en question et d'interroger une gamme de textes qui refletent la variation discursive et pragmatique, au lieu de consulter le canon des traditions textuelles actuellement disponibles sur des bases numerisees, qui sont essentiellement litteraires. C'est pourquoi nous avons consulte des sources de nature differente, qui pourraient attester des usages emergents, a savoir les corpus du Reseau Corpus Francais Preclassique et Classique (RCFC). Seront presentes les resultats de deux etudes de cas (la recategorisation des formes dedans/dessous/dessus/dehors et la montee des clitiques), abondamment discutes par les remarqueurs.
Y1 - 2020
U6 - https://doi.org/10.1017/S0959269520000058
SN - 0959-2695
SN - 1474-0079
VL - 30
IS - 3
SP - 301
EP - 326
PB - Cambridge Univ. Press
CY - Cambridge
ER -
TY - JOUR
A1 - Amaechi, Mary Chimaobi
A1 - Georgi, Doreen
T1 - On optional wh-/focus fronting in Igbo
BT - a SYN-SEM-PHON interaction
JF - Zeitschrift für Sprachwissenschaft
N2 - This paper discusses surface optionality in focus fronting in the Benue-Congo language Igbo. A focused XP can occur in-situ or ex-situ. We argue that the optionality does not have its origins in the syntax: in fact, exactly one focused XP has to move to the designated focus position in the left periphery in the syntax. The alternation between in-situ and ex-situ rather arises at PF: either the lowest or the topmost copy of the focus chain is pronounced. The choice is determined by semantic-pragmatic factors, i. e., we see an interaction between PF and LF. This constitutes a challenge for a strict version of the Y-model of grammar.
KW - (A)over-bar-movement
KW - focus realization
KW - PF-optionality
KW - Y-model
KW - copy
KW - pronounciation
KW - Benue-Congo languages
Y1 - 2020
U6 - https://doi.org/10.1515/zfs-2020-2017
SN - 0721-9067
SN - 1613-3706
VL - 39
IS - 3
SP - 299
EP - 327
PB - De Gruyter
CY - Berlin
ER -
TY - JOUR
A1 - Allroggen, Niklas
A1 - Beiter, Daniel
A1 - Tronicke, Jens
T1 - Ground-penetrating radar monitoring of fast subsurface processes
JF - Geophysics
N2 - Earth and environmental sciences rely on detailed information about subsurface processes. Whereas geophysical techniques typically provide highly resolved spatial images, monitoring subsurface processes is often associated with enormous effort and, therefore, is usually limited to point information in time or space. Thus, the development of spatial and temporal continuous field monitoring methods is a major challenge for the understanding of subsurface processes. We have developed a novel method for ground-penetrating-radar (GPR) reflection monitoring of subsurface flow processes under unsaturated conditions and applied it to a hydrological infiltration experiment performed across a periglacial slope deposit in northwest Luxembourg. Our approach relies on a spatial and temporal quasicontinuous data recording and processing, followed by an attribute analysis based on analyzing differences between individual time steps. The results demonstrate the ability of time-lapse GPR monitoring to visualize the spatial and temporal dynamics of preferential flow processes with a spatial resolution in the order of a few decimeters and temporal resolution in the order of a few minutes. We observe excellent agreement with water table information originating from different boreholes. This demonstrates the potential of surface-based GPR reflection monitoring to observe the spatiotemporal dynamics of water movements in the subsurface. It provides valuable, and so far not accessible, information for example in the field of hydrology and pedology that allows studying the actual subsurface processes rather than deducing them from point information.
Y1 - 2020
U6 - https://doi.org/10.1190/GEO2019-0737.1
SN - 0016-8033
SN - 1942-2156
VL - 85
IS - 3
SP - A19
EP - A23
PB - Society of Exploration Geophysicists
CY - Tulsa
ER -
TY - JOUR
A1 - Alisch, Julia
A1 - Kirchner, Vera
T1 - Escape Rooms - eine Methode mit Potenzial für die ökonomische und politische Bildung?
JF - Unterricht Wirtschaft + Politik
Y1 - 2020
SN - 2191-6624
SN - 2751-1243
IS - 03
SP - 53
EP - 55
PB - Friedrich Verlag GmbH
CY - Hannover
ER -
TY - JOUR
A1 - Alisch, Julia
A1 - Kirchner, Vera
T1 - Escape Rooms
BT - Eine Methode mit Potenzial für die ökonomische und politische Bildung?
JF - Unterricht Wirtschaft + Politik
Y1 - 2020
SN - 2191-6624
VL - 2020
IS - 3
SP - 53
EP - 55
PB - Friedrich Verlag
CY - Hannover
ER -
TY - JOUR
A1 - Alirezaeizanjani, Zahra
A1 - Großmann, Robert
A1 - Pfeifer, Veronika
A1 - Hintsche, Marius
A1 - Beta, Carsten
T1 - Chemotaxis strategies of bacteria with multiple run modes
JF - Science advances
N2 - Bacterial chemotaxis-a fundamental example of directional navigation in the living world-is key to many biological processes, including the spreading of bacterial infections. Many bacterial species were recently reported to exhibit several distinct swimming modes-the flagella may, for example, push the cell body or wrap around it. How do the different run modes shape the chemotaxis strategy of a multimode swimmer? Here, we investigate chemotactic motion of the soil bacterium Pseudomonas putida as a model organism. By simultaneously tracking the position of the cell body and the configuration of its flagella, we demonstrate that individual run modes show different chemotactic responses in nutrition gradients and, thus, constitute distinct behavioral states. On the basis of an active particle model, we demonstrate that switching between multiple run states that differ in their speed and responsiveness provides the basis for robust and efficient chemotaxis in complex natural habitats.
KW - exploit
KW - flagellum
KW - instability
KW - time
Y1 - 2020
U6 - https://doi.org/10.1126/sciadv.aaz6153
SN - 2375-2548
VL - 6
IS - 22
PB - American Association for the Advancement of Science
CY - Washington
ER -
TY - JOUR
A1 - Alexoudi, Xanthippi
A1 - Mallonn, Matthias
A1 - Keles, Engin
A1 - Poppenhäger, Katja
A1 - von Essen, Carolina
A1 - Strassmeier, Klaus
T1 - Role of the impact parameter in exoplanet transmission spectroscopy
JF - Astronomy and astrophysics : an international weekly journal
N2 - Context
Transmission spectroscopy is a promising tool for the atmospheric characterization of transiting exoplanets. Because the planetary signal is faint, discrepancies have been reported regarding individual targets.
Aims
We investigate the dependence of the estimated transmission spectrum on deviations of the orbital parameters of the star-planet system that are due to the limb-darkening effects of the host star. We describe how the uncertainty on the orbital parameters translates into an uncertainty on the planetary spectral slope.
Methods
We created synthetic transit light curves in seven different wavelength bands, from the near-ultraviolet to the near-infrared, and fit them with transit models parameterized by fixed deviating values of the impact parameter b. First, we performed a qualitative study to illustrate the effect by presenting the changes in the transmission spectrum slope with different deviations of b. Then, we quantified these variations by creating an error envelope (for centrally transiting, off-center, and grazing systems) based on a derived typical uncertainty on b from the literature. Finally, we compared the variations in the transmission spectra for different spectral types of host stars.
Results
Our simulations show a wavelength-dependent offset that is more pronounced at the blue wavelengths where the limb-darkening effect is stronger. This offset introduces a slope in the planetary transmission spectrum that becomes steeper with increasing b values. Variations of b by positive or negative values within its uncertainty interval introduce positive or negative slopes, thus the formation of an error envelope. The amplitude from blue optical to near-infrared wavelength for a typical uncertainty on b corresponds to one atmospheric pressure scale height and more. This impact parameter degeneracy is confirmed for different host types; K stars present prominently steeper slopes, while M stars indicate features at the blue wavelengths.
Conclusions
We demonstrate that transmission spectra can be hard to interpret, basically because of the limitations in defining a precise impact parameter value for a transiting exoplanet. This consequently limits a characterization of its atmosphere.
KW - planets and satellites: atmospheres
KW - planets and satellites: gaseous
KW - planets
Y1 - 2020
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-605378
SN - 0004-6361
SN - 1432-0746
VL - 640
PB - EDP Sciences
CY - Les Ulis
ER -
TY - JOUR
A1 - Aldiyarov, Abdurakhman
A1 - Sokolov, Dmitriy
A1 - Akylbayeva, Aigerim
A1 - Nurmukan, Assel
A1 - Tokmoldin, Nurlan
T1 - On thermal stability of cryovacuum deposited CH4+H2O films
JF - Low temperature physics
N2 - Whereas stable homogenous states of aqueous hydrocarbon solutions are typically observed at high temperatures and pressures far beyond the critical values corresponding to individual components, the stability of such system may be preserved upon transition into the region of metastable states at low temperatures and low pressures. This work is dedicated to the study of the thermal stability of a water-methane mixture formed by cryogenic vapor phase deposition. The obtained thin films were studied using vibrational spectroscopy in the temperature range of 16-180 K. During thermal annealing of the samples, characteristic vibrational C-H modes of methane were monitored alongside the chamber pressure to register both structural changes and desorption of the film material. The obtained results reveal that upon the co-deposition of methane and water, methane molecules appear both in non-bound and trapped states. The observed broadening of the characteristic C-H stretching mode at 3010 cm(-1) upon an increase in temperature of the sample from 16 to 90 K, followed by narrowing of the peak as the temperature is reduced back to 16 K, indicates localization of methane molecules within the water matrix at lower temperatures.
KW - molecular crystals
KW - water-methane films
KW - vibrational spectroscopy
KW - low
KW - temperature
KW - methane localization
Y1 - 2020
U6 - https://doi.org/10.1063/10.0002156
SN - 1063-777X
SN - 1090-6517
VL - 46
IS - 11
SP - 1121
EP - 1124
PB - American Institute of Physics
CY - Melville
ER -
TY - JOUR
A1 - Albrecht, Torsten
A1 - Winkelmann, Ricarda
A1 - Levermann, Anders
T1 - Glacial-cycle simulations of the Antarctic Ice Sheet with the Parallel Ice Sheet Model (PISM)
BT - Part 1: boundary conditions and climatic forcing
JF - The Cryosphere : TC ; an interactive open access journal of the European Geosciences Union
N2 - Simulations of the glacial-interglacial history of the Antarctic Ice Sheet provide insights into dynamic threshold behavior and estimates of the ice sheet's contributions to global sea-level changes for the past, present and future. However, boundary conditions are weakly constrained, in particular at the interface of the ice sheet and the bedrock. Also climatic forcing covering the last glacial cycles is uncertain, as it is based on sparse proxy data.
We use the Parallel Ice Sheet Model (PISM) to investigate the dynamic effects of different choices of input data, e.g., for modern basal heat flux or reconstructions of past changes of sea level and surface temperature. As computational resources are limited, glacial-cycle simulations are performed using a comparably coarse model grid of 16 km and various parameterizations, e.g., for basal sliding, iceberg calving, or for past variations in precipitation and ocean temperatures. In this study we evaluate the model's transient sensitivity to corresponding parameter choices and to different boundary conditions over the last two glacial cycles and provide estimates of involved uncertainties. We also discuss isolated and combined effects of climate and sea-level forcing. Hence, this study serves as a "cookbook" for the growing community of PISM users and paleo-ice sheet modelers in general.
For each of the different model uncertainties with regard to climatic forcing, ice and Earth dynamics, and basal processes, we select one representative model parameter that captures relevant uncertainties and motivates corresponding parameter ranges that bound the observed ice volume at present. The four selected parameters are systematically varied in a parameter ensemble analysis, which is described in a companion paper.
Y1 - 2020
U6 - https://doi.org/10.5194/tc-14-599-2020
SN - 1994-0416
SN - 1994-0424
VL - 14
IS - 2
SP - 599
EP - 632
PB - Copernicus
CY - Göttingen
ER -
TY - JOUR
A1 - Albrecht, Torsten
A1 - Winkelmann, Ricarda
A1 - Levermann, Anders
T1 - Glacial-cycle simulations of the Antarctic Ice Sheet with the Parallel Ice Sheet Model (PISM)
BT - part 2: parameter ensemble analysis
JF - The Cryosphere : TC ; an interactive open access journal of the European Geosciences Union
N2 - The Parallel Ice Sheet Model (PISM) is applied to the Antarctic Ice Sheet over the last two glacial cycles (approximate to 210 000 years) with a resolution of 16 km. An ensemble of 256 model runs is analyzed in which four relevant model parameters have been systematically varied using full-factorial parameter sampling. Parameters and plausible parameter ranges have been identified in a companion paper (Albrecht et al., 2020) and are associated with ice dynamics, climatic forcing, basal sliding and bed deformation and represent distinct classes of model uncertainties. The model is scored against both modern and geologic data, including reconstructed grounding-line locations, elevation-age data, ice thickness, surface velocities and uplift rates. An aggregated score is computed for each ensemble member that measures the overall model-data misfit, including measurement uncertainty in terms of a Gaussian error model (Briggs and Tarasov, 2013). The statistical method used to analyze the ensemble simulation results follows closely the simple averaging method described in Pollard et al. (2016).
This analysis reveals clusters of best-fit parameter combinations, and hence a likely range of relevant model and boundary parameters, rather than individual best-fit parameters. The ensemble of reconstructed histories of Antarctic Ice Sheet volumes provides a score-weighted likely range of sea-level contributions since the Last Glacial Maximum (LGM) of 9.4 +/- 4.1m (or 6.5 +/- 2.0 x 10(6) km(3)), which is at the upper range of most previous studies. The last deglaciation occurs in all ensemble simulations after around 12 000 years before present and hence after the meltwater pulse 1A (MWP1a). Our ensemble analysis also provides an estimate of parametric uncertainty bounds for the present-day state that can be used for PISM projections of future sea-level contributions from the Antarctic Ice Sheet.
Y1 - 2020
U6 - https://doi.org/10.5194/tc-14-633-2020
SN - 1994-0416
SN - 1994-0424
VL - 14
IS - 2
SP - 633
EP - 656
PB - Copernicus Publ.
CY - Göttingen
ER -
TY - JOUR
A1 - Albrecht, Anna Helena
T1 - Untreue als politisches Delikt
JF - Goltdammer’s Archiv für Strafrecht
Y1 - 2020
SN - 0017-1956
VL - 167
IS - 12
SP - 703
EP - 723
PB - C.F. Müller
ER -
TY - JOUR
A1 - Albert, Justin Amadeus
A1 - Owolabi, Victor
A1 - Gebel, Arnd
A1 - Brahms, Clemens Markus
A1 - Granacher, Urs
A1 - Arnrich, Bert
T1 - Evaluation of the Pose Tracking Performance of the Azure Kinect and Kinect v2 for Gait Analysis in Comparison with a Gold Standard
BT - A Pilot Study
JF - Sensors
N2 - Gait analysis is an important tool for the early detection of neurological diseases and for the assessment of risk of falling in elderly people. The availability of low-cost camera hardware on the market today and recent advances in Machine Learning enable a wide range of clinical and health-related applications, such as patient monitoring or exercise recognition at home. In this study, we evaluated the motion tracking performance of the latest generation of the Microsoft Kinect camera, Azure Kinect, compared to its predecessor Kinect v2 in terms of treadmill walking using a gold standard Vicon multi-camera motion capturing system and the 39 marker Plug-in Gait model. Five young and healthy subjects walked on a treadmill at three different velocities while data were recorded simultaneously with all three camera systems. An easy-to-administer camera calibration method developed here was used to spatially align the 3D skeleton data from both Kinect cameras and the Vicon system. With this calibration, the spatial agreement of joint positions between the two Kinect cameras and the reference system was evaluated. In addition, we compared the accuracy of certain spatio-temporal gait parameters, i.e., step length, step time, step width, and stride time calculated from the Kinect data, with the gold standard system. Our results showed that the improved hardware and the motion tracking algorithm of the Azure Kinect camera led to a significantly higher accuracy of the spatial gait parameters than the predecessor Kinect v2, while no significant differences were found between the temporal parameters. Furthermore, we explain in detail how this experimental setup could be used to continuously monitor the progress during gait rehabilitation in older people.
KW - motion capture
KW - evaluation
KW - human motion
KW - RGB-D cameras
KW - digital health
Y1 - 2020
U6 - https://doi.org/10.3390/s20185104
SN - 1424-8220
VL - 20
IS - 18
PB - MDPI
CY - Basel
ER -
TY - JOUR
A1 - Al-Saedy, Ammar Jaffar Muhesin
A1 - Tarchanov, Nikolaj Nikolaevič
T1 - A degree theory for Lagrangian boundary value problems
JF - Žurnal Sibirskogo Federalʹnogo Universiteta = Journal of Siberian Federal University; mathematics & physics
N2 - We study those nonlinear partial differential equations which appear as Euler-Lagrange equations of variational problems. On defining weak boundary values of solutions to such equations we initiate the theory of Lagrangian boundary value problems in spaces of appropriate smoothness. We also analyse if the concept of mapping degree of current importance applies to Lagrangian problems.
N2 - Мы изучаем те нелинейные уравнения с частными производными, которые возникают как уравнения Эйлера-Лагранжа вариационных задач. Определяя слабые граничные значения решений таких уравнений, мы инициируем теорию лагранжевых краевых задач в функциональных пространствах подходящей гладкости. Мы также анализируем, применяется ли современная концепция степени отображения к лагранжевым проблемам.
KW - nonlinear equations
KW - Lagrangian system
KW - weak boundary values
KW - quasilinear Fredholm operators
KW - mapping degree
Y1 - 2020
U6 - https://doi.org/10.17516/1997-1397-2020-13-1-5-25
SN - 1997-1397
SN - 2313-6022
VL - 13
IS - 1
SP - 5
EP - 25
PB - Sibirskij Federalʹnyj Universitet
CY - Krasnojarsk
ER -