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Defect related anomalous mobility of small polarons in dielectric oxides at the example of congruent lithium niobate
No full textPolarons play a major role in the description of optical, electrical and dielectrical properties of several ferroelectric oxides. The motion of those particles occur by elementary hops among the material lattice sites. In order to compute macroscopic transport parameters such as charge mobility, normal (i.e. Fickian) diffusion laws are generally assumed. In this paper we show that when defect states able to trap the polarons for long times are considered, significant deviations from the normal diffusion behaviour arise. As an example of this behavior, we consider here the case of lithium niobate (LN). This can be considered as a prototypical system, having a rich landscape of interacting polaron types and for which a significant wealth of information is available in literature. Our analysis considers the case of a stoichiometric, defect free lithium niobate containing a certain concentration of small electron polarons hopping on regular Nb sites, and compares it to the material in congruent composition, which is generally found in real-life applications and which is characterized by a large concentration of antisite NbLi defects. While in the first case the charge carriers are free polarons hopping on a regular Nb sublattice, in the second case a fraction of polarons is trapped on antisite defects. Thus, in the congruent material, a range of different hopping possibilities arises, depending on the type of starting and destination sites. We develop a formalism encompassing all these microscopic processes in the framework of a switching diffusion model which can be well approximated by a mobile–immobile transport model providing explicit expressions for the polaron mobility. Finally, starting from the
Marcus–Holstein’s model for the polaron hopping frequency we verify by means of a Monte Carlo approach the diffusion/mobility of the different polarons species showing that, while free polarons
obey the laws for normal diffusion as expected, bound polarons follow an anomalous diffusion behaviour and that in the case of the congruent crystal where mixed free and bound polaron transport is involved, our expressions indeed provide a satisfactory description
Have you seen this? Video documentation of advanced electron microscopy workflows
No full textVideo documentation of general procedures for advanced electron microscopy performed within the integrated Bioimaging facility Osnabrueck. Part of chapter 4.4 of PhD thesis "Development and application of advanced correlative light and electron microscopy methods for biological samples"by Rico Franzkoch
Metadata in Multimedia Containers for Instantaneous Visualizations and Visual Analytics
No full textWith the rising amount of gaze behavior analysis, where participants get tracked watching video stimuli, the amount of corresponding gaze data records increases, too. Unfortunately, in most cases, these data are collected in separate files in custom-made or proprietary data formats. Thus these data are hard to access even for experts, and effectively inaccessible for non-experts. Expensive or custom-made software is necessary for the data analysis. By promoting the use of existing multimedia container formats for distributing and archiving eye tracking and gaze data bundled with the stimuli media, we define an exchange format that can be interpreted by standard multimedia players as well as streamed via the Internet. We converted several gaze data sets into our format, demonstrating the feasability of our approach and allowing to visualize these data with standard multimedia players. We also introduce two plugins for one of these players, allowing for further visual analytics. We discuss the benefit of gaze data in a multimedia containers and explain possible visual analytics approaches based on our implementations, converted datasets, and first user interviews.
Converted Eye Tracking Data Sets with Instantaneous Visualizations
The following data sets are provided for research purposes. By using these data sets in the proposed multimedia container format, please cite [S0], [S1], [S2], or [S3] and also the original dataset [A], [B], [C], [K], or [R].
Real World Visual Processing [S3] - 1 video
Açik et al. [A] dataset - 216 videos
Sundberg et al. [B] dataset - 7 videos
Coutrot & Guyader [C] dataset - 60 videos
Kurzhals et al. [K] dataset - 11 videos
Riche et al. [R] dataset - 24 videos
Source Code
VLC 3.0.0 patch
Modified version of the subsusf.c. Necessary for the playback of the USF files.
USF to ASS translation
XSL file for USF to ASS translation usf2ass.xsl.
VLC Visual Analytics Plugins
To install the extensions under Linux, please copy the SimSub.lua and/or MergeSub.lua into ~/.local/share/vlc/lua/extensions/ for the current user or /usr/lib/vlc/lua/extensions/ for all users.
SimSub: Visualization of different eye tracking datasets in multiple windows
MergeSub: Visualization of different eye tracking datasets in a single window
References
[S0] J. Schöning, C. Gundler, G. Heidemann, P. König & U. Krumnack.
Visual Analytics of Gaze Data with Standard Multimedia Players.
Journal of Eye Movement Research, 10(5) : 1-14, 2017. http://dx.doi.org/10.16910/jemr.10.5.4
[S1] J. Schöning, P. Faion, G. Heidemann & U. Krumnack.
Eye Tracking Data in Multimedia Containers for Instantaneous Visualizations.
In IEEE VIS Workshop on Eye Tracking and Visualization (ETVIS), pages: 74-78, 2016. IEEE. http://dx.doi.org/10.1109/ETVIS.2016.7851171
[S3] J. Schöning, A.L. Gert, A. Açik, T.C. Kietzmann, G. Heidemann & P. König.
Exploratory Multimodal Data Analysis with Standard Multimedia Player --- Multimedia Containers: a Feasible Solution to make Multimodal Research Data Accessible to the Broad Audience.
In Proceedings of the 12th Joint Conference on Computer Vision, Imagingand Computer Graphics Theory and Applications (VISAPP), pages: 272-279, ISBN: 978-989-758-225-7, 2017. SCITEPRESS. http://dx.doi.org/10.5220/0006260202720279
[A] A. Açik, A. Bartel & P. König.
Real and implied motion at the center of gaze.
Journal of Vision, 14(2) : 1-19, 2014. Association for Research in Vision and Ophthalmology (ARVO). http://dx.doi.org/10.1167/14.1.2
[B] P. Sundberg, T. Brox, M. Maire, P. Arbelaez & J. Malik.
Occlusion boundary detection and figure/ground assignment from optical flow.
In IEEE Conference on Computer Vision and Pattern Recognition (CVPR), pages: 2233-2240, 2011. IEEE. http://dx.doi.org/10.1109/cvpr.2011.5995364
[C] A. Coutrot & N. Guyader.
How saliency, faces, and sound influence gaze in dynamic social scenes.
Journal of Vision, 14(8) : 5-5, 2014. Association for Research in Vision and Ophthalmology (ARVO). http://dx.doi.org/10.1167/14.8.5
[K] K. Kurzhals, C.F. Bopp, J. Bässler, F. Ebinger & D. Weiskopf.
Benchmark data for evaluating visualization and analysis techniques for eye tracking for video stimuli.
In ACM Workshop on Beyond Time and Errors: Novel Evaluation Methods for Visualization (BELIV), pages: 54-60, 2014. ACM Press. http://dx.doi.org/10.1145/2669557.2669558
[R] N. Riche, M. Mancas, D. Culibrk, V. Crnojevic, B. Gosselin & T. Dutoit.
Dynamic Saliency Models and Human Attention: A Comparative Study on Videos.
Lecture Notes in Computer Science, pages: 586-598, ISBN: 978-3-642-37431-9, 2013. Springer Science + Business Media. http://dx.doi.org/10.1007/978-3-642-37431-9_45
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Replikationsdaten für: The many dimensions of time: Conceptualizing and measuring temporal aspects in organizations
No full textTime is a central variable in organizational life. Many time-related phenomena that are relevant in organizational contexts have been suggested. This stresses the need to consider the complexity of time in organizations. Hence, an overview that conceptualizes a broad range of time-related dimensions can guide researchers and practitioners in understanding organizational phenomena from a temporal perspective, investigating interdependencies between time-related dimensions and outcome variables, or comparing time-related dimensions between organizations, sectors, or broader social entities. The present research aims to contribute to previous research on time in organizations by suggesting a broader, multi-dimensional framework and questionnaire of organizational time-related dimensions. This framework differentiates abstraction levels of time-related dimensions, specifies relations to work-related tasks and activities, and allows for a meaningful categorization of organizational time-related dimensions. The final framework consists of 21 time-related dimensions within six categories on three different levels of abstraction. Based on this framework, a questionnaire for the measurement of 20 of these time-related dimensions is developed demonstrating good overall fit. Relationships between selected time-related dimensions and job attitudes, health-related variables, and occupational characteristics are tested to evaluate nomological validity and gain first insights into relations between organizational time profiles and important organizational outcomes
Evaluation BQT III im "Osnabrücker Modell"
No full textIm Zuge der Evaluation des neu geschaffenen Moduls der ambulanten berufsqualifizierenden Tätigkeit III (BQT III) im Masterstudiengang "Psychologie: Schwerpunkt Klinische Psychologie und Psychotherapie", wurden statistische Analysen durchgeführt. Die entsprechenden R-Codes und R-Pakete, ein eigens konzipierter und zur Evaluation eingesetzter Fragebogen sowie weiterführende Evaluationsergebnisse können eingesehen werden
Machine loging data
No full textThis data was collected within the resarch project Agri-Gaia.
This data contains logging data from work of different agricultural machines (sprayer, spreader and seeder) on a field called "Linne". It contains position and time of the recording of each data point. Additionally different signals are also recorded on most data point. These signals for example are application rate, driving speed, distance/time in work, height, ...
Replication Data for: Territorial Acoustic Species Estimation using Acoustic Sensor Networks
No full textThis dataset is provided to replicate the results from
Brüggemann, Leonhard and Otten, Daniel and Sachser, Frederik and Aschenbruck, Nils, Territorial Acoustic Species Estimation using Acoustic Sensor Networks (January 08, 2025). Available at SSRN: https://ssrn.com/abstract=5113322 or http://dx.doi.org/10.2139/ssrn.5113322
The data consists of multiple parts, each packaged into a separate zip-file. To use the data, you will need to download all parts and recombine them into a single archive. The file README.yaml desribes the structure.
The final .zip file is limited to 88.7 GB, while the unzipped directory requires 96.9 GB of storage space.
In Ubuntu, you can reassemble the parts using the Terminal:
user@computer$ cat TASE_ASnet.part.* > TASE_ASNet.zip</pre
SUF LBS-Monitor: 4. Erhebungswelle
No full textDie Daten stammen aus einer Längsschnittstudie zur professionsbezogenen Entwicklung von Studierenden in Studiengängen für das Lehramt an berufsbildenden Schulen (LBS-Monitor). Die Studie wird durchgeführt im Rahmen des Projektes "DEIN LBS-Campus", das vom Bundesministerium für Bildung und Forschung gefördert wird (Laufzeit: 01.03.2020-31.12.2023). Über Onlinebefragungen an mehreren Standorten der hochschulischen beruflichen Lehrerbildung werden soziodemographische Merkmale der Studierenden, Angaben zum Studium und zu den Studienvoraussetzungen, Merkmale der professionsbezogenen Entwicklung, verschiedene Studien- und berufsbezogene Aspekte und ausgewählte Qualitätsaspekte sowie formale Leistungsindikatoren erfasst. Die 4. Welle wurde im Wintersemester 2022/23 durchgeführt. Zur Verfügung gestellt werden eine Scientific-Use-File (SUF) des Wellendatensatzes und des Gesamtdatensatzes. Beide stehen im SPSS-Format zur Verfügung. Die bereinigte SUF des Wellendatensatzes umfasst 223 Fälle und 382 Variablen. Die SUF Gesamtdatensatzes umfasst 1.191 Fälle und 1.168 Variablen. Die Daten werden über verschiedene Berichte dokumentiert. Das Skalenhandbuch enthält eine Dokumentation des Gesamtdatensatzes und wird über die Erhebungswellen fortgeschrieben. Das Codebook, der Datenbericht und der Wellenbericht beziehen sich auf die 4. Erhebungswelle. Das Codebook dokumentiert die erhobenen Variablen hinsichtlich Fragestellung und Codierung, im Datenbericht werden statistische Kennwerte berichtet. Die Erhebung und ausgewählte Analyseergebnisse sind im Wellenbericht zu finden
Qualitative Interviewdaten des DFG Projekts: Auswirkungen der Ausbildungsduldung auf die Bildungsintegration geflüchteter Jugendlicher
No full textDer Datensatz umfasst 23 Interviews mit jungen Geflüchteten, die im Rahmen des von der DFG geförderten Projekts "Auswirkungen der Ausbildungsduldung auf die Bildungsintegration geflüchteter Jugendlicher" (GZ: WE 7027/1-1) befragt wurden. Das Projekt zielte darauf ab, das bisher kaum beforschte juristische Novum der Ausbildungsduldung vor dem Hintergrund seiner Wirkmächtigkeit auf die Bildungsverläufe junger Geflüchteter zu beleuchten. Da die Perspektive bisheriger Forschungen primär auf den Übergang in die Ausbildung von Geflüchteten lag, fokussierte die vorliegende Studie nun den sich daran anschließenden Ausbildungsweg der Auszubildenden. Hierbei wurde die Frage adressiert, inwiefern sich die Ausbildungsduldung, die alleine an die Absolvierung einer Berufsausbildung und damit an das erfolgreiche Erbringen von Integrationsleistungen gekoppelt wird, auf die Ausbildungsverläufe junger Geflüchteter auswirkt