Refine
Year of publication
- 2016 (2217) (remove)
Document Type
- Article (1341)
- Doctoral Thesis (322)
- Postprint (215)
- Monograph/Edited Volume (74)
- Other (73)
- Review (64)
- Part of a Book (59)
- Part of Periodical (17)
- Preprint (17)
- Master's Thesis (12)
- Conference Proceeding (11)
- Habilitation Thesis (6)
- Bachelor Thesis (2)
- Journal/Publication series (1)
- Report (1)
- Study Thesis (1)
- Working Paper (1)
Language
- English (1772)
- German (408)
- Russian (16)
- Spanish (11)
- French (6)
- Italian (2)
- Multiple languages (1)
- Portuguese (1)
Is part of the Bibliography
- yes (2217) (remove)
Keywords
- German (11)
- climate change (10)
- Germany (8)
- Magellanic Clouds (8)
- aggression (8)
- children (8)
- prosody (8)
- sentence processing (8)
- adolescents (7)
- prevalence (7)
Institute
- Institut für Biochemie und Biologie (291)
- Institut für Geowissenschaften (291)
- Institut für Physik und Astronomie (258)
- Institut für Chemie (213)
- Institut für Ernährungswissenschaft (84)
- Mathematisch-Naturwissenschaftliche Fakultät (79)
- Institut für Mathematik (71)
- Department Psychologie (70)
- Wirtschaftswissenschaften (61)
- Sozialwissenschaften (57)
This study investigates the characteristics of narrative-speech production and the use of verbs in Turkish agrammatic speakers (n = 10) compared to non-brain-damaged controls (n = 10). To elicit narrative-speech samples, personal interviews and storytelling tasks were conducted. Turkish has a large and regular verb inflection paradigm where verbs are inflected for evidentiality (i.e. direct versus indirect evidence available to the speaker). Particularly, we explored the general characteristics of the speech samples (e.g. utterance length) and the uses of lexical, finite and non-finite verbs and direct and indirect evidentials. The results show that speech rate is slow, verbs per utterance are lower than normal and the verb diversity is reduced in the agrammatic speakers. Verb inflection is relatively intact; however, a trade-off pattern between inflection for direct evidentials and verb diversity is found. The implications of the data are discussed in connection with narrative-speech production studies on other languages.
Ice complex deposits are characteristic, ice-rich formations in northern East Siberia and represent an important part in the arctic carbon pool. Recently, these late Quaternary deposits are the objective of numerous investigations typically relying on outcrop and borehole data. Many of these studies can benefit from a 3D structural model of the subsurface for upscaling their observations or for constraining estimations of inventories, such as the local carbon stock. We have addressed this problem of structural imaging by 3D ground-penetrating radar (GPR), which, in permafrost studies, has been primarily used for 2D profiling. We have used a 3D kinematic GPR surveying strategy at a field site located in the New Siberian Archipelago on top of an ice complex. After applying a 3D GPR processing sequence, we were able to trace two horizons at depths below 20 m. Taking available borehole and outcrop data into account, we have interpreted these two features as interfaces of major lithologic units and derived a 3D cryostratigraphic model of the subsurface. Our data example demonstrated that a 3D surveying and processing strategy was crucial at our field site and showed the potential of 3D GPR to image geologic structures in complex ice-rich permafrost landscapes.
Here, we study the 3-D subduction initiation process induced by the interaction between a hot thermochemical mantle plume and oceanic lithosphere using thermo-mechanical viscoplastic finite difference marker-in-cell models. Our numerical modeling results show that self-sustaining subduction is induced by plume-lithosphere interaction when the plume is sufficiently buoyant, the oceanic lithosphere is sufficiently old and the plate is weak enough to allow the buoyant plume to. pass through it. Subduction initiation occurs following penetration of the lithosphere by the hot plume and the downward displacement of broken, nearly circular segments of lithosphere (proto-slabs) as a result of partially molten plume rocks overriding the proto-slabs. Our experiments show four different deformation regimes in response to plume-lithosphere interaction: a) self-sustaining subduction initiation, in which subduction becomes self-sustaining; b) frozen subduction initiation, in which subduction stops at shallow depths; c) slab break-off, in which the subducting circular slab breaks off soon after formation; and d) plume underplating, in which the plume does not pass through the lithosphere and instead spreads beneath it (i.e., failed subduction initiation). These regimes depend on several parameters, such as the size, composition, and temperature of the plume, the brittle/plastic strength and age of the oceanic lithosphere, and the presence/absence of lithospheric heterogeneities. The results show that subduction initiates and becomes self-sustaining when the lithosphere is older than 10 Myr and the non dimensional ratio of the plume buoyancy force and lithospheric strength above the plume is higher than approximately 2. The outcomes of our numerical experiments are applicable for subduction initiation in the modern and Precambrian Earth and for the origin of plume-related corona structures on Venus. (C) 2016 Elsevier B.V. All rights reserved.
The Earth’s shallow subsurface with sedimentary cover acts as a waveguide to any incoming wavefield. Within the framework of my thesis, I focused on the characterization of this shallow subsurface within tens to few hundreds of meters of sediment cover. I imaged the seismic 1D shear wave velocity (and possibly the 1D compressional wave velocity). This information is not only required for any seismic risk assessment, geotechnical engineering or microzonation activities, but also for exploration and global seismology where site effects are often neglected in seismic waveform modeling.
First, the conventional frequency-wavenumber (f - k) technique is used to derive the dispersion characteristic of the propagating surface waves recorded using distinct arrays of seismometers in 1D and 2D configurations. Further, the cross-correlation technique is applied to seismic array data to estimate the Green’s function between receivers pairs combination assuming one is the source and the other the receiver. With the consideration of a 1D media, the estimated cross-correlation Green’s functions are sorted with interstation distance in a virtual 1D active seismic experiment. The f - k technique is then used to estimate the dispersion curves. This integrated analysis is important for the interpretation of a large bandwidth of the phase velocity dispersion curves and therefore improving the resolution of the estimated 1D Vs profile.
Second, the new theoretical approach based on the Diffuse Field Assumption (DFA) is used for the interpretation of the observed microtremors H/V spectral ratio. The theory is further extended in this research work to include not only the interpretation of the H/V measured at the surface, but also the H/V measured at depths and in marine environments. A modeling and inversion of synthetic H/V spectral ratio curves on simple predefined geological structures shows an almost perfect recovery of the model parameters (mainly Vs and to a lesser extent Vp). These results are obtained after information from a receiver at depth has been considered in the inversion.
Finally, the Rayleigh wave phase velocity information, estimated from array data, and the H/V(z, f) spectral ratio, estimated from a single station data, are combined and inverted for the velocity profile information. Obtained results indicate an improved depth resolution in comparison to estimations using the phase velocity dispersion curves only. The overall estimated sediment thickness is comparable to estimations obtained by inverting the full micortremor H/V spectral ratio.
We present an algorithm that performs sequentially one-dimensional inversion of subsurface magnetic permeability and electrical conductivity by using multi-configuration electromagnetic induction sensor data. The presented method is based on the conversion of the in-phase and out-of-phase data into effective magnetic permeability and electrical conductivity of the equivalent homogeneous half-space. In the case of small-offset systems, such as portable electromagnetic induction sensors, for which in-phase and out-of-phase data are moderately coupled, the effective half-space magnetic permeability and electrical conductivity can be inverted sequentially within an iterative scheme. We test and evaluate the proposed inversion strategy using synthetic and field examples. First, we apply it to synthetic data for some highly magnetic environments. Then, the method is tested on real field data acquired in a basaltic environment to image a formation of archaeological interest. These examples demonstrate that a joint interpretation of in-phase and out-of-phase data leads to a better characterisation of the subsurface in magnetic environments such as volcanic areas.
We dissect the sources of error leading to inaccuracies in the description of the geometry and optical excitation energies of pi-conjugated polymers. While the ground-state bond length alternation is shown to be badly reproduced by standard functionals, the recently adapted functionals PBEh* and omega PBE* as well as the double hybrid functional XYGJ-OS manage to replicate results obtained at the CCSD(T) level. By analysis of the bond length alternation in the excited state, a sensitive dependence of the exciton localization on the long-range behavior of the functional and the amount of Hartree-Fock exchange present is shown. Introducing thermal disorder through molecular dynamics simulations allows the consideration of a range of thermally accessible configurations of each oligomer, including trans to cis rotations, which break the conjugation of the backbone. Thermal disorder has a considerable effect when combined with functionals that overestimate the delocalization of the excitation, such as B3LYP. For functionals with a larger amount of exact exchange such as our PBEh* and omega PBE*, however, the effect is small, as excitations are often localized enough to fit between twists in the chain.
The fruit of Aristotelia chilensis is considered a "super fruit" due to its high concentration of polyphenols displaying exceptional antioxidant capacities ORAC. From maqui berries have been reported several anthocyanins and glycosylated flavonoids, those benefits increase the attention to restudy the plant. From the leaves of A. chilensis several indole alkaloids have been reported, we in addition to aristoteline, aristone, aristoquinoline and 3-fromylindole report the spectroscopic elucidation of 8-oxo-9-dehydromakomakine (1), hobartine (2) and a new alkaloid named 8-oxohobartine (3). Compound 1 to 3 did not show bactericidal activity against E. coli and S. aureus till 200 mu g.
The article offers a rereading of Sibylla Schwarz’s prose eclogue, Faunus. By describing the circumstances and the development of a young love in detail, Schwarz directs the reader’s attention to the fact, that Christian moral and ethical standards are external, and, therefore, are to be rejected. Instead, she places the ‘anthropological’ dimension in the foreground, the interest in human beings and their emotional motivations. Affective control and adaptation to conventions are less important. In that regard, this short text can be seen as an integral part of a prehistory of ‘literary anthropology,’ which ultimately evolved only in the course of the 18th century, although, as will be shown, its precursors can already be found in the 17th century.
New forms of communication and greater accessibility of Islamic texts on-line allow Muslims to shape their own religiosity, to become less dependent on established sources of authority, and thereby to become more aware of their own cultural diversity as a community. New practices of transnational Islam, and the growth of new concepts of Muslim identities currently emerging in the on-line community, are relatively free from immediate constraints. This article provides the result of a sociological analysis of three Internet sites in Sydney which deliver on-line fatwas. Even if cyberspace has allowed the Muslim world to be de-territorialised and provides a way for people to distance themselves from traditional communities if they wish, this research points out a variety of approaches, including one case which is aiming at re-localising an Australian Muslim system of values. This case highlights ways in which first generation Muslims are re-territorialising Shari'a in a specific western country.
"Seid mutig und aufrecht!"
(2016)
Der 'Centralverein deutscher Staatsbürger jüdischen Glaubens' (C.V.) wurde 1893 in Berlin gegründet. Sein Tätigkeitsschwerpunkt lag ursprünglich auf dem Gebiet des Rechtsschutzes gegen antisemitische Diskriminierungen. Eine zweite Säule seiner Arbeit war die Aufklärung der Nichtjuden über das 'wahre Wesen' des Judentums. Johann Nicolai analysiert in diesem Band unter Auswertung der Moskauer Archivbestände die Entwicklung des Vereins von 1933 bis zu seiner Auflösung im Jahr 1938. Im Mittelpunkt der Studie steht die Frage, wie der Centralverein die Fortsetzung seiner Arbeit gegenüber seinen Mitgliedern begründete, obwohl im Nationalsozialismus die grundlegenden Bürgerrechte für die deutschen Juden, die er ursprünglich verteidigen wollte, nicht mehr gewährleistet waren. Ein besonderer Fokus liegt auf der Wandlung des Centralvereins nach den Nürnberger Gesetzen und der darauf erfolgten Umbenennung und Umstrukturierung. Wesentlicher Bestandteil ist auch die Auseinandersetzung mit der jüdischen Emigration nach Übersee. Nicolai zeigt auf, dass es bis tief in die 1930er-Jahre hinein starke Spannungen im deutschen Judentum gab.
Study 1 targets grammatical restrictions, based on a corpus of peer group conversations among adolescents. We show that noncanonical variants have the form of bare NPs with or without preposition and appear in both multilingual and monolingual speech communities, following the same syntactic and semantic patterns. While there is a quantitative advantage for the multilingual group, noncanonical variants generally constitute only a minority compared to canonical full PP[DP]. Study 2 targets usage restrictions across communicative situations, based on a corpus of elicited productions by adolescents from a multilingual urban neighbourhood. Comparisons show significantly more noncanonical local expressions in informal, peer-group situations than in formal ones for both spoken and written modes. Taken together, results indicate a selective, grammatically restricted and register-bound choice of noncanonical local expressions.
The aim of this study was to develop a one-step synthesis of gold nanotriangles (NTs) in the presence of mixed phospholipid vesicles followed by a separation process to isolate purified NTs. Negatively charged vesicles containing AOT and phospholipids, in the absence and presence of additional reducing agents (polyampholytes, polyanions or low molecular weight compounds), were used as a template phase to form anisotropic gold nanoparticles. Upon addition of the gold chloride solution, the nucleation process is initiated and both types of particles, i.e., isotropic spherical and anisotropic gold nanotriangles, are formed simultaneously. As it was not possible to produce monodisperse nanotriangles with such a one-step procedure, the anisotropic nanoparticles needed to be separated from the spherical ones. Therefore, a new type of separation procedure using combined polyelectrolyte/micelle depletion flocculation was successfully applied. As a result of the different purification steps, a green colored aqueous dispersion was obtained containing highly purified, well-defined negatively charged flat nanocrystals with a platelet thickness of 10 nm and an edge length of about 175 nm. The NTs produce promising results in surface-enhanced Raman scattering.
"Der unterirdische Kampf"
(2016)
Die militärische Rüstungsbürokratie zwischen Niederlage des Deutschen Kaiserreiches und ›Totalem Krieg‹ der NS-Diktatur – in dieses Spannungsverhältnis begibt sich der Autor. Er untersucht, wie die Fachleute des Wehrwirtschafts- und Rüstungsamtes die Mobilisierung planten – und dabei scheiterten.
Bereits kurze Zeit nach der deutschen Niederlage von 1918 wurden die wirtschaftlichen Aspekte der Kriegführung wieder von einem kleinen, hochprofessionellen Offizierskreis diskutiert. Sie nahmen Gedanken aus der Zeit des Ersten Weltkrieges auf und forderten in der Reichswehr und noch stärker in der Wehrmacht die Steuerungshoheit des Militärs über die kriegsrelevante Wirtschaft. Ihre Planungen und Maßnahmen waren nicht nur im Offizierkorps selbst umstritten, sondern unterlagen letztlich auch den Widerständen der Privatwirtschaft und den Interessen von NS-Parteigrößen. Entlang dieser Fronten beschreibt der Autor eine militärische Organisation von ihrem Aufbau 1924 bis zu ihrer ›Zerschlagung‹ durch Albert Speer 1942. Dabei nimmt er auch das alles andere als eindeutige Verhalten des Führungspersonals im Amt in den Blick.
This chapter investigates the trajectory of establishing the Forest Stewardship Council (FSC) in the early 1990s as the first private transnational certification organization with an antagonistic stakeholder body. Its main contribution is a micro-analysis of the founding assembly in 1993. By investigating the role of brokers within the negotiation as one institutional scope condition for ‘arguing’ having occurred, the chapter adopts a dramaturgical approach. It contends that the authority of brokers is not necessarily institutionally given, but needs to be gained: brokers have to prove situationally that their knowledge is relevant and that they are speaking impartially in the interest of progress rather than their own. The chapter stresses the importance of procedural knowledge which brokers provide in contrast to policy knowledge.