@article{63999, abstract = {{The behavior of mixtures of 1-octanol with water with different molar ratios confined inside the mesoporous silica SBA-15 was investigated by a combination of solid-state NMR spectroscopy and molecular dynamics (MD) simulations. Two-dimensional H-1-Si-29 FSLG-HET-COR NMR spectra revealed the orientation of 1-octanol relative to the pore walls. These arrangements are in good agreement with the preferred structures found by MD. In addition, MD simulations also shed light on molecular orientations and interactions in the pore center region, which are not resolvable by solid-state NMR.}}, author = {{Kumari, B. and Brodrecht, M. and Breitzke, H. and Werner, M. and Grunberg, B. and Limbach, H. H. and Forg, S. and Sanjon, E. P. and Drossel, B. and Gutmann, Torsten and Buntkowsky, G.}}, issn = {{1932-7447}}, journal = {{Journal of Physical Chemistry C}}, number = {{34}}, pages = {{19540–19550}}, title = {{{Mixtures of Alcohols and Water confined in Mesoporous Silica: A Combined Solid-State NMR and Molecular Dynamics Simulation Study}}}, doi = {{10.1021/acs.jpcc.8b04745}}, volume = {{122}}, year = {{2018}}, } @inproceedings{64374, author = {{Gerhardt, Nils Christopher and Neutsch, Krisztian and Göring, Lena}}, booktitle = {{Nanoimaging and Nanospectroscopy VI}}, title = {{{Common-path digital holographic microscopy for 3D nanoparticle localization}}}, doi = {{10.1117/12.2321175}}, year = {{2018}}, } @article{32485, abstract = {{Using the methods of differential mass-spectrometric thermal analysis (DMSTA), thermogravimetric analysis (TGA), microscale combustion calorimetry (MCC), and fast pyrolysis (FP), thermal decomposition of high-molecular-weight polymethylmetacrylate (PMMA) has been investigated in the temperature range of 315 + 500 degrees C. Based on these data, the kinetic parameters (the activation energy, the pre-exponential factor) were obtained of a one-step pyrolysis reaction in supposition of a first-order reaction using simple mathematical fitting and an iso-conversion method. Validity of the obtained kinetic parameters was verified by comparing the experimental data on dependence of the decomposition rate on temperature in the broad range of the heating rates with the results of simulating the above dependence, using these kinetic parameters. These parameters, obtained in the broad temperature range, may be further used in numerical simulation of PMMA combustion under fire conditions and for assessing the polymer's flammability.}}, author = {{Korobeinichev, Oleg P. and Paletsky, Alexey А. and Gonchikzhapov, Maksim B. and Glaznev, Roman K. and Gerasimov, Ivan E. and Naganovsky, Yuri K. and Shundrina, Irina K. and Snegirev, Alexey Y. and Vinu, R.}}, issn = {{0040-6031}}, journal = {{Thermochimica Acta}}, keywords = {{Physical and Theoretical Chemistry, Condensed Matter Physics, Instrumentation}}, pages = {{17--25}}, publisher = {{Elsevier BV}}, title = {{{Kinetics of thermal decomposition of PMMA at different heating rates and in a wide temperature range}}}, doi = {{10.1016/j.tca.2018.10.019}}, volume = {{671}}, year = {{2018}}, } @inproceedings{24193, abstract = {{A complete system analysis for an integrated passive RFID transponder designed at 5.8 GHz range is presented, and a comprehensive set of design concerns for the rectifier circuit as the core of the harvesting block is also discussed. The system analysis is complemented by transistor-level design and simulation of harvesting circuits in a commercial 65 nm CMOS technology. A differential drive rectifier (DDR) has been selected as the most efficient harvesting topology for microwave frequency applications, which works at very low input power levels. The circuit was designed and simulated including chip layout parasitics and antenna matching circuitry. Considering the power budget of the tag chip, a power conversion efficiency of roughly 68.4% is achieved in simulation for an input RF power of around -11.26dBm.}}, author = {{Haddadian, Sanaz and Scheytt, Christoph}}, booktitle = {{Electromagnetics Research Symposium}}, issn = {{1559-9450 }}, location = {{ Toyama, Japan}}, title = {{{Wireless Energy Harvesting in RFID Applications at 5.8 GHz ISM Band, a System Analysis}}}, doi = {{10.23919/PIERS.2018.8597594}}, volume = {{40th}}, year = {{2018}}, } @inproceedings{58666, abstract = {{In this paper, a questionnaire-based survey on the use of online videos by undergraduate engineering students for study-related purposes is presented. Over the last few years, a large number of instructional videos has been uploaded to websites such as YouTube. Due to the widespread distribution of high-speed internet connections and (mobile) devices, such as smartphones or laptops, which are nowadays routinely used by students, online videos are also frequently used in higher education. While much research on this subject focuses on Massive Open Online Courses (MOOCs) or flipped classroom approaches, this survey examines use of videos for self-study, complementary to traditional face-to-face courses. Furthermore, we analyze the acceptance of a characteristic video production style, which uses specific 3D animations to clarify complex connections between technical and mathematical aspects. The results indicate extensive use of short videos which address subjects that are particularly difficult for the students. This survey can help educators to develop an impression of current video use by undergraduate engineering students. In this paper, a questionnaire-based survey on the use of online videos by undergraduate engineering students for study-related purposes is presented. Especially over the last few years, a large number of instructional videos has been uploaded to websites such as YouTube. Due to the widespread distribution of high-speed internet connections and (mobile) devices, such as smartphones or laptops, which are nowadays routinely used by students, online videos are also frequently used in higher education. While much research on this subject focuses on Massive Open Online Courses (MOOCs) or flipped classroom approaches, this survey examines usage behavior concerning the apparently much more common use of videos for self-study, complementary to traditional face-to-face courses. Furthermore, we analyze the acceptance of a characteristic video production style using specific 3D animations to clarify complex connections between technical and mathematical aspects. The results indicate that short videos addressing subjects that are particularly difficult for the students are extensively used. Additionally, this survey can help educators to develop a realistic understanding of current video use by undergraduate engineering students.}}, author = {{Hennig, Markus and Mertsching, Bärbel}}, booktitle = {{Proceedings of the 4th International Conference on Higher Education Advances (HEAd'18)}}, publisher = {{Universitat Politècnica València}}, title = {{{Study-related Use of Instructional Videos by Undergraduate Engineering Students}}}, doi = {{10.4995/head18.2018.8207}}, year = {{2018}}, } @inproceedings{24185, abstract = {{In this poster, we present the first experimental results of our OFDM-based Vehicular VLC (V-VLC) prototype. Our Bit Error Rate (BER) measurements show that for lower Modulation and Coding Schemes (MCS), the performance of our hardware-setup roughly behaves the same as it does in simulation for AWGN channel. However, for higher order MCS with high PAPR, the BER performance gets degraded due to non-linear behavior of LEDs, and deviates further from AWGN performance as the MCS order is increased. The obtained results suggest that unlike RF-Communications, where the focus is usually towards linearity of the amplifiers, for V-VLC, linearity within the whole system is required to achieve optimal performance.}}, author = {{Koepe, Jörn and Kaltschmidt, Christian and Illian, Marvin and Puknat, Robert and Kneuper, Pascal and Wittemeier, Steffen and Memedi, Agon and Tebruegge, Claas and Amjad, Muhammad Sohaib and Kruse, Stephan and Kress, Christian and Scheytt, Christoph and Dressler, Falko}}, booktitle = {{2018 IEEE Vehicular Networking Conference (VNC)}}, publisher = {{IEEE}}, title = {{{First Performance Insights on Our Noval OFDM-based Vehicular VLC Prototype}}}, doi = {{10.1109/VNC.2018.8628322}}, year = {{2018}}, } @inproceedings{60448, author = {{Lim, Isaak and Dielen, Alexander and Campen, Marcel and Kobbelt, Leif}}, booktitle = {{Computer Vision - ECCV 2018 Workshops - Munich, Germany, September 8-14, 2018, Proceedings, Part III}}, editor = {{Leal-Taixé, Laura and Roth, Stefan}}, pages = {{349–362}}, publisher = {{Springer}}, title = {{{A Simple Approach to Intrinsic Correspondence Learning on Unstructured 3D Meshes}}}, doi = {{10.1007/978-3-030-11015-4_26}}, volume = {{11131}}, year = {{2018}}, } @inproceedings{25084, author = {{Akbulut, Akin and Abke, Stephan and Laroque, Christoph}}, booktitle = {{ Proceedings of the 2017 Winter Simulation Conference }}, editor = {{Chan, W. K. V and D’Ambrogio, A and Zacharewicz, G and Mustafee, N and Wainer, G and Page, E}}, publisher = {{Institute of Electrical and Electronics Engineers, Inc.}}, title = {{{Automated Model Verification using an Equivalence Test on a Reference Mode}}}, year = {{2017}}, } @inproceedings{25100, author = {{Akbulut, Akin and Laroque, Christoph and Dangelmaier, Wilhelm}}, editor = {{Wenzel, Sigrid and Peter, Tim}}, pages = {{189 -- 198}}, publisher = {{Kassel University Press}}, title = {{{Automatisierte Modellverifikation mithilfe einer Äquivalenzprüfung an einem Referenzmodell}}}, year = {{2017}}, } @inbook{19515, author = {{Bührmann, Thorsten and Büker, Petra and Höke, Julia}}, booktitle = {{Profession und Disziplin - Grundschulpädagogik im Diskurs. Jahrbuch Grundschulforschung. Band 22.}}, pages = {{212--217}}, publisher = {{Springer VS}}, title = {{{Wir sind jetzt alle Lernbegleiter“ – Nivellierungstendenzen in der multiprofessionellen Teamarbeit im Übergang Kita-Grundschule}}}, volume = {{22}}, year = {{2017}}, } @article{20288, author = {{Folgar, Ribadas H. and Böddeker, T. and Chergui, A. and Ivanjko, Martin and Gili, F. and Behrens, S.}}, journal = {{Procedia Structural Integrity}}, pages = {{516--523}}, title = {{{Joining TWIP-Steel Simulation Models}}}, year = {{2017}}, } @inproceedings{24223, abstract = {{This paper presents the design flow of using sampling technique for fault injection on sche- matic level. The parameters used in the docu- ment to calculate the likelihood could be modi- fied by using more realistic data from the fab. With the help of the fault simulator, the whole design flow of the fault effect simulation can be realized automatically.}}, author = {{Wu, Liang and Abughannam, Saed and Müller, Wolfgang and Scheytt, Christoph and Ecker, Wolfgang}}, booktitle = {{2nd Workshop on Resiliency in Embedded Electronic Systems (REES)}}, pages = {{68}}, title = {{{SPICE-Level Fault Injection with Likelihood Weighted Random Sampling - A Case Study}}}, year = {{2017}}, } @article{26107, abstract = {{Capillary forces are very important considering the handling of powders as they, in general, exceed other adhesion forces. These capillary forces are dependent on several different parameters. Especially the distance between the particles is an important parameter. For example, in moving bulk solids a large variety of distances between particles will occur. Therefore, the distance-dependence of capillary bridges was investigated with a numerical simulation method, assuming thermodynamic equilibrium which is attained very fast for small particles. This method uses the Kelvin equation and the Young-Laplace equation to calculate numerically the shape of the capillary bridge without any assumption regarding the shape. The force is eventually derived from the meniscus shape. The distance becomes extremely important when the capillary liquid bridge between two surfaces is only determined by capillary condensation depending on relative humidity. Only a slight increase of the distance within the fraction of a nanometer changes the behaviour of the capillary force significantly. Furthermore, the influence of the force on the separation of particles will be presented. The force decreases almost linearly with increasing distance for a wide range of distances and consequently, a contact stiffness for capillary bridges could be derived. These results may e.g. be used in DEM models. Also, the maximum separation distance of capillary bridges in thermodynamic equilibrium and the correlation with the according bridge volume was investigated. As two limiting cases for capillary bridges at varying distances one can assume either a constant curvature, i.e. infinitely fast attainment of equilibrium, or a constant volume, i.e. infinitely slow attainment of equilibrium. Therefore, a comparison of these two possibilities will be presented and discussed as well.}}, author = {{Dörmann, Michael and Schmid, Hans-Joachim}}, issn = {{0032-5910}}, journal = {{Powder Technology}}, pages = {{175--183}}, title = {{{Distance-dependency of capillary bridges in thermodynamic equilibrium}}}, doi = {{10.1016/j.powtec.2017.01.012}}, year = {{2017}}, } @inbook{26867, author = {{Klünder, Nina}}, booktitle = {{Care und die Wissenschaft vom Haushalt}}, editor = {{Häußler, Angela and Küster, Christine and Ohrem, Sandra and Wagenknecht, Inga }}, title = {{{Mahlzeitenmuster von Eltern in Paarbeziehungen}}}, doi = {{10.1007/978-3-658-19362-1_7}}, year = {{2017}}, } @misc{26868, author = {{Klünder, Nina}}, publisher = {{LibreCat University}}, title = {{{Differenzierte Ermittlung des Gender Care Gap auf Basis der repräsentativen Zeitverwendungsdaten 2012/13}}}, doi = {{10.25595/1368}}, year = {{2017}}, } @article{26870, abstract = {{The article examines the division of labor for everyday food routines of two-parent households depending on their labor force participation. Using data from the representative German Time Use Survey 2001/02 and 2012/13, three different pairs were formed: dual-earner couples, couples with additional female income and male-breadwinner couples Findings show that mother’s employment influences the time used for everyday food routines: It was found that the higher the employment rate of mothers, the less time was spent on food routine activities. Furthermore, the daily time used for everyday food routines was reduced from 2001/02 to 2012/13. The largest reductions were seen in the group of mothers working fulltime. Besides that, fathers were more engaged in meal preparation on the weekends, although the responsibility was the mother’s. In addition, the age and number of children in a household influenced the time used for everyday food routines. However, none of the examined pair constellations can help determine an egalitarian division of everyday food routines. There is still a labor division by gender. Zusammenfassung Der Beitrag untersucht die zeitliche Gestaltung sowie die innerfamiliale Arbeitsteilung des Essalltags von Müttern und Vätern in Paarbeziehungen differenziert nach deren Erwerbsumfang. Die Sekundäranalyse erfolgt auf Basis der repräsentativen Zeitverwendungsdaten 2012/13 und 2001/02, wobei drei Paarkonstellationen untersucht werden: Doppelverdiener-Paare, weibliche Zuverdiener- Paare sowie Paare mit männlichem Familienernährer. Die Analyse des Essalltags zeigt, dass der Erwerbsstatus der Mutter die zeitliche Gestaltung des Essalltags beeinflusst. Je höher dieser ist, desto weniger Zeit wird für die Ernährungsversorgung aufgewendet. Darüber hinaus hat sich die tägliche Zeitverwendung für die Ernährungsversorgung von 2001/02 bis 2012/13 reduziert, wobei die stärksten Einsparungen bei vollzeiterwerbstätigen Müttern zu konstatieren sind. Väter engagieren sich verstärkt am Wochenende bei der Mahlzeitenzubereitung, gleichwohl liegt die Verantwortung insgesamt bei den Müttern. Ebenso beeinflussen Alter und Anzahl der Kinder die Zeitverwendung für die Ernährungsversorgung. Letztlich kann in keiner untersuchten Paarkonstellation eine egalitäre Arbeitsteilung zur Gestaltung des Essalltags festgestellt werden. Vielmehr dominieren relativ ausgeprägte geschlechtsspezifische Arrangements.}}, author = {{Klünder, Nina and Meier-Gräwe, Uta}}, issn = {{2699-2337}}, journal = {{Journal of Family Research}}, pages = {{179--201}}, title = {{{Essalltag und Arbeitsteilung von Eltern in Paarbeziehungen – Eine quantitative Analyse auf Basis der repräsentativen Zeitverwendungsdaten 2012/13 und 2001/02}}}, doi = {{10.3224/zff.v29i2.03}}, year = {{2017}}, } @article{26883, author = {{Meier-Gräwe, Uta and Klünder, Nina}}, journal = {{Familien stärken, Vielfalt ermöglichen. Bericht der familienpolitischen Kommission der Heinrich-Böll-Stiftung}}, pages = {{22--41}}, publisher = {{Heinrich-Böll-Stiftung }}, title = {{{Ausgewählte Ergebnisse der Zeitbudgeterhebungen 1991/92, 2001/02 und 2012/13}}}, volume = {{19}}, year = {{2017}}, } @article{26887, author = {{Zimmermann, Josepha and Klünder, Nina}}, journal = {{Hauswirtschaft und Wissenschaft }}, pages = {{1--3}}, title = {{{Generation Y. Wohin mit der Zeit? Ein empirischer Vergleich zur Zeitverwendung verschiedener Generationen}}}, doi = {{10.23782/HUW_09_2017}}, year = {{2017}}, } @article{26927, author = {{Diederichs, Tanja and Herder, C and Roßbach, S and Roden, M and Wudy, SA and Nöthlings, U and Alexy, U and Buyken, Anette}}, issn = {{2072-6643}}, journal = {{Nutrients}}, number = {{6}}, title = {{{Carbohydrates from Sources with a Higher Glycemic Index during Adolescence: Is Evening Rather than Morning Intake Relevant for Risk Markers of Type 2 Diabetes in Young Adulthood?}}}, doi = {{10.3390/nu9060591}}, volume = {{9}}, year = {{2017}}, } @article{3523, abstract = {{We numerically simulate the circular polarization ratio of the radar signal backscattered from a large-grain cometary coma and compare the simulation results with the radar measurements for seven comets. We apply the discrete dipole approximation method and a model of random irregular particles. Our results confirm water ice composition of the cm-sized chunks detected by the NASA Deep Impact space probe in the vicinity of the nucleus of Comet 103P/Hartley 2. The index of the power-law size distribution in this case can be constrained to the range n ≈ 3.3–4.3. For the other considered comets the circular polarization ratio can be reproduced with variations of the power index between 2 and 5.}}, author = {{Dogra, Shraddha and Grynko, Yevgen and Zubko, Evgenij and Förstner, Jens}}, issn = {{0004-6361}}, journal = {{Astronomy & Astrophysics}}, keywords = {{tet_topic_scattering}}, pages = {{A20}}, publisher = {{EDP Sciences}}, title = {{{Radar backscattering from a large-grain cometary coma: numerical simulation}}}, doi = {{10.1051/0004-6361/201730801}}, volume = {{608}}, year = {{2017}}, }