@inbook{34970,
author = {{Süßmann, Johannes}},
booktitle = {{Languages of Reform in the Eighteenth Century. When Europe Lost Its Fear of Change}},
editor = {{Richter, Susan and Maissen, Thomas and Albertone, Manuela}},
isbn = {{978-1-00-074052-3}},
pages = {{213–231}},
publisher = {{Routledge}},
title = {{{A Kind of Sovereignty? Legitimising Freedom of Contract in the 18th Century}}},
doi = {{https://doi.org/10.4324/9780367855017-10}},
year = {{2020}},
}
@inproceedings{19393,
abstract = {{To provide a simple instrument to operate residential Load-Shifting or Demand-Side-Management
systems, the measurement of the actual grid frequency seems to be an appropriate method. Due to the present
inflexibility and the lack of sufficient throttling capabilities of lignite and nuclear power plants, a surplus of
electricity generation occurs during periods of high wind and solar power generation. While the specific CO2-
emission is decreasing then ‒ due to the increased share of Renewables, the grid frequency is increasing (to a certain
limit). Using the grid frequency as an indicator to switch-on and off certain loads (loads that do not require power
permanently (e.g. dishwashers, washing machines, dryers, fridges and freezers, heaters) could provide a simple,
inexpensive demand-side management indicator to lower specific CO2‒emssions and costs (if a dynamic
consumption tariff is available). To check the truthfulness of that hypothesis, the grid and frequency data of the
German grid of the year 2018 have been collected and a the correlation between grid frequency, power surplus, share
of renewables vs. CO2-contents and price at the European energy exchange (EEX) have been calculated. The results
show: Correlation between frequency and share of renewables is quite low (r = 0.155) due to the fact that primary
grid control quickly compensates deviations from the 50 Hz nominal frequency. There is a good anti-correlation (r = -
0.687) between the EEX‒prices and the share of renewables in the grid. Over the years, correlation between
electricity trading prices (EEX) and CO2 emissions is quite good (r =0.665), within the one year (2018) that
correlation almost doesn’t exist, possibly due to the inflexibility of the bulky lignite power plants that even operate at
negative prices.
}},
author = {{Krauter, Stefan and Zhang, L.}},
booktitle = {{Proceedings of the 37th European Photovoltaic Solar Energy Conference, 07 - 11 September 2020.}},
issn = {{ 3-936338-73-6}},
keywords = {{Keywords: Load-Shifting, Demand-Side-Management, DSM, grid frequency, EEX, electricity trading prices, renewable share, flexibility, emissions, CO2}},
location = {{online}},
pages = {{1815 -- 1817}},
title = {{{Triggering Demand‒Side‒Management: Correlation of electricity prices, share of renewables, CO2‒contents, and grid‒frequency in the German electricity grid.}}},
doi = {{10.4229/EUPVSEC20202020-6BV.5.9}},
year = {{2020}},
}
@inproceedings{19390,
abstract = {{Due to the strong reduction of PV prices, storage plays a dominating role in overall system costs. A
steeper elevation angle would result in a more balanced seasonal PV yield, at the cost of PV yield reductions during
summer, but allowing reduced storage capacities. Additionally, the effect of a single-axis tracking system has been
investigated, generating more electricity during the morning and evening hours, thus reducing daily storage
requirements. The necessary PV size and storage capacities required for the German energy supply (1,500 TWh after
electrification of all sectors) via 100% renewable energies and a 50% solar share have been calculated via the
HOMER Pro software, considering the bridging of periods of "dark lulls“ in winter, using costs of 2030 (Table 1).
Results: The increase of module elevation angles above the typical 30° leads to a reduction of investment and supply
costs. The optimum is reached at a cost reduction of -1.5% for an elevation angle at the latitude of the installation
site. An explanation is that high elevation angles are favorable for clear winter days, but not at all for the critical days
with diffuse irradiance only, so the battery capacity must be increased. For the same reason, tracking systems do not
offer any cost advantage (at least for the ones without an option for horizontal positioning during diffuse days).}},
author = {{Krauter, Stefan and Rustemovic, D. and Khatibi, Arash}},
booktitle = {{Proceedings of the 37th European Photovoltaic Solar Energy Conference, 07 - 11 September 2020}},
isbn = {{3-936338-73-6}},
keywords = {{Energy Storage, PV system integration, Large Grid-connected PV systems, Simulation, Energy Supply Options}},
location = {{online}},
pages = {{1818 -- 1819}},
title = {{{Reduction of required storage capacities for a 100% renewable energy supply in Germany, if new PV systems are installed with east-west tracking systems at increased elevation angles}}},
doi = {{10.4229/EUPVSEC20202020-6BV.5.10}},
year = {{2020}},
}
@inproceedings{18387,
abstract = {{ During comparative measurements of different PV microinverters, two yield issues came up that could
not be explored via conventional efficiency measurements, but do have a significant impact on electrical energy
yield: First category of issues are either sluggish or nervously acting maximum–power–point–tracking devices, which
lead to reduced energy yields. The other category of issues is thermal: As a first explanation for observed reduced
energy yields, it has been assumed that the conversion efficiency degrades at higher operating temperatures. This
matter has been investigated in this article: A change in conversion efficiency could not be observed for elevated
operation temperatures up to 50°C, despite high-precision and repeated measurements. But it was found that some
inverters temporarily interrupted (or entirely stopped) operation after long periods of running at high temperatures.
Also, a reduction in potential maximum power output has been detected for those inverters. Summarizing: With a
high degree of certainty it can be stated that those reported yield losses have been caused by the temporary shutdowns
and power limitations of the inverters.}},
author = {{Krauter, Stefan and Bendfeld, Jörg}},
booktitle = {{Proceedings of the EU PVSEC 2020 }},
issn = {{3-936338-73-6}},
keywords = {{AC-modules, Microinverter, Power Conditioning, Thermal Performance, Ventilation, Stability, Efficiency, Yield}},
location = {{online}},
pages = {{1179 -- 1180}},
title = {{{Elevated Temperatures Affecting Efficiency, Overall Performance and Energy Yield of PV Microinverters}}},
doi = {{10.4229/EUPVSEC20202020-4AV.3.6}},
year = {{2020}},
}
@inproceedings{19383,
abstract = {{Due to the present inflexibility and the lack of sufficient throttling capabilities of lignite and nuclear power plants, a surplus of electricity generation occurs during periods of high wind and solar power generation in the German electricity grid. While the specific CO2-emission is decreasing then - due to the increased share of Renewables, the grid frequency should be increasing (to a certain limit). Using the grid frequency as an indicator to switch-on and -off certain loads (loads that do not require power permanently (e.g. dishwashers, washing machines, dryers, fridges and freezers, heaters) could provide a simple, inexpensive demand-side-management indicator to lower specific CO2-emissions and costs (if a dynamic consumption tariff is applied). To check the truthfulness of that hypothesis, the grid and frequency data of the German grid of the year 2018 have been collected and the correlations between grid frequency, share of renewables, CO2-contents, and actual price at the European energy exchange (EEX) have been calculated. The results show: Correlation between grid frequency and the share of renewables is quite low (r=0.155) due to the fact that primary grid control quickly compensates deviations from the 50 Hz nominal frequency. As expected, there is a good anti-correlation (r=-0.687) between the EEX-prices and the share of renewables in the grid. Over the years, correlation between electricity trading prices (EEX) and CO2 emissions is quite good (r=0.665), within the one year (2018) that correlation almost doesn't exist, possibly due to the inflexibility of the bulky lignite baseload power plants that even operate at negative prices.}},
author = {{Krauter, Stefan and Zhang, L.}},
booktitle = {{Proceedings of the 47th IEEE Photovoltaic Specialists Conference (PVSC 47) 2020}},
keywords = {{CO2, EEX, Grid frequency, DSM, electricity price, Renewable share}},
location = {{online}},
pages = {{1672--1674}},
title = {{{Correlation of grid-frequency, electricity prices, share of Renewables and CO2-contents of German electricity grid to enable inexpensive triggering of Demand-Side-Management}}},
doi = {{10.1109/PVSC45281.2020.9300487}},
year = {{2020}},
}
@inproceedings{16899,
abstract = {{To compare efficiency and yield of many micro-inverters available on the world market in 2014-2020, an in- and outdoor test laboratory at the University of Paderborn has been set up. The inverters have been fed by identical and calibrated crystalline silicon PV modules of 215 Wp. To monitor accurately DC input, AC power output and energy yield, each of the micro-inverters has been equipped with a calibrated electricity meter. For micro-inverters requiring control units for grid-feeding that has been acquired also. The comparison covers efficiency-load characteristics as well as electrical energy yields. Purchase costs vary considerably between the models in comparison, sometimes inverter costs are higher than module costs, particularly if an additional grid-connection or interface device is needed for operation. The weighted conversion efficiency according to EU and CEC standards has been measured and calculated. While some inverters have been optimized for high irradiance levels, they ranked better at the CEC efficiency, others performed very well also for low irradiance levels, thus ranking higher at in the EU-efficiency tables. These results are deviating from the actual energy yield measurements, which show a slightly different ranking. At one inverter, an accurate, but very slow MPPT algorithm that barely could follow quickly changing irradiance levels could be the reason for this effect. Another inverter switched off after operation at high power output for a while. Apparently, some inverters are been optimized to show excellent EU and CEC efficiency ratings. Two of the inverters featuring two inputs did not show an exceptional performance at the EU- and CEC-ratings, but they achieved top ranks at the AC energy yield for the first years. For the customer, the AC yield is a major performance indicator of any microinverter and should be included in the datasheet.}},
author = {{Krauter, Stefan and Bendfeld, Jörg}},
booktitle = {{Proceedings of the 47th IEEE Photovoltaic Specialists Conference (PVSC 47) JUNE 15 - AUGUST 21, 2020 VIRTUAL MEETING}},
issn = {{ 0160-8371}},
keywords = {{yield, AC, micro-inverter, MPPT, CEC rating, EU efficiency, Photovoltaic, Solar}},
location = {{VIRTUAL MEETING}},
pages = {{1429--1432}},
publisher = {{IEEE}},
title = {{{Comparison of Microinverters: Update on Rankings of Conversion Efficiencies and Energy Yields}}},
doi = {{10.1109/PVSC45281.2020.9300953}},
year = {{2020}},
}
@inproceedings{16855,
author = {{Krauter, Stefan and Zhang, L.}},
booktitle = {{Tagungsband des 35. Symposiums für Photovoltaische Solarenergie, Kloster Banz, Bad Staffelstein (Deutschland)}},
location = {{Bad Staffelstein}},
title = {{{Eignung der Netzfrequenz als Instrument der Entscheidungsfindung zur Auslösung von Lastverschiebungen bei niedrigen spezifischen CO2-Emissionen und EEX-Handelspreisen}}},
year = {{2020}},
}
@article{27117,
abstract = {{Through co-occurrence analysis of 1139 documents (1964-2018) we identified trends in the discussions about the implementation of student teaching evaluation (SET). We found that: (1) Attention to SET originated in the US in the 1970s, spreading to German-speaking countries in the mid-1990s and continuing in China and Latin America in the early 2000s. (2) SET is commonly viewed as a control tool deserving methodological improvement, while bias is debated in the US. We also found local trajectories: (3) Whereas in the US and Latin America SET is primarily seen as a management tool, German-speaking and Chinese authors reflect more on improving teaching. Chinese scholars consider SET a valid instrument for state control associated with artificial intelligence. Also, (4) SET is commonly used in medical education in the US and the German-speaking region and in physical education in China. We conclude that SET is discussed cross-nationally but affected by national path dependencies.}},
author = {{Pineda, Pedro and Steinhardt, Isabel}},
issn = {{1356-2517}},
journal = {{Teaching in Higher Education}},
keywords = {{academic discourse, bibliometric review, quality assurance, student evaluation of teaching, teaching evaluation}},
pages = {{1--21}},
title = {{{The Debate on student evaluations of teaching: global convergence confronts higher education traditions}}},
doi = {{10.1080/13562517.2020.1863351}},
year = {{2020}},
}
@inbook{28002,
author = {{Homt, Martina and Bloh, Bea and Grosser, Christine}},
booktitle = {{Forschendes Lernen in der Lehrer/innenbildung. Implikationen für Wissenschaft und Praxis}},
editor = {{Basten, M. and Mertens, C. and Schöning, A. and Wolf, E.}},
pages = {{165--176}},
publisher = {{Waxmann}},
title = {{{Die Einstellung angehender Lehrkräfte zu Forschendem Lernen im Praxissemester und Referendariat}}},
year = {{2020}},
}
@inbook{28000,
author = {{Bloh, Thiemo and Bloh, Bea}},
booktitle = {{Professionelle Lerngemeinschaften als Entwicklungsinstrument im Bildungswesen}},
editor = {{Kansteiner, Katja and Buhren, Claus G. and Theurl, Peter}},
isbn = {{978-3-7799-6047-8}},
pages = {{49--62}},
title = {{{Professionelle Lerngemeinschaften als Entwicklungsinstrument - Eine kritische Reflexion}}},
year = {{2020}},
}
@inproceedings{20504,
abstract = {{In recent years time domain speech separation has excelled over frequency domain separation in single channel scenarios and noise-free environments. In this paper we dissect the gains of the time-domain audio separation network (TasNet) approach by gradually replacing components of an utterance-level permutation invariant training (u-PIT) based separation system in the frequency domain until the TasNet system is reached, thus blending components of frequency domain approaches with those of time domain approaches. Some of the intermediate variants achieve comparable signal-to-distortion ratio (SDR) gains to TasNet, but retain the advantage of frequency domain processing: compatibility with classic signal processing tools such as frequency-domain beamforming and the human interpretability of the masks. Furthermore, we show that the scale invariant signal-to-distortion ratio (si-SDR) criterion used as loss function in TasNet is related to a logarithmic mean square error criterion and that it is this criterion which contributes most reliable to the performance advantage of TasNet. Finally, we critically assess which gains in a noise-free single channel environment generalize to more realistic reverberant conditions.}},
author = {{Heitkaemper, Jens and Jakobeit, Darius and Boeddeker, Christoph and Drude, Lukas and Haeb-Umbach, Reinhold}},
booktitle = {{ICASSP 2020 Virtual Barcelona Spain}},
keywords = {{voice activity detection, speech activity detection, neural network, statistical speech processing}},
title = {{{Demystifying TasNet: A Dissecting Approach}}},
year = {{2020}},
}
@article{29362,
abstract = {{Der vorliegende Aufsatz fragt nach Strategien kultureller Vermittler, den bei der Erstbegegnung mit einer fremden Kultur eintretenden Schock zu verarbeiten und die kulturellen Differenzen neu zu semantisieren und sinnhaft zu deuten. Er greift drei geografisch und chronologisch weit auseinanderliegende Fallbeispiele von kulturellen Vermittlern auf, die vor dem Hintergrund ihres umfassenden antiken Bildungswissens versuchten, die Fremde als „lebende Antike“ zu interpretieren: Missionare in Neuspanien im 16. und 17. Jahrhundert, einen Griechenlandreisenden der 1830er und einen Japanreisenden der 1930er Jahre. Der analysierte Vermittlungsprozess wird als „doppelte Allelopoiese“ beschrieben: die brokers stilisierten einerseits die Antike als zwar weit zurückliegenden, aber essentiellen Teil ihrer eigenen kulturellen Identität; sie parallelisierten andererseits die fremde Lebenswelt, mit der sie konfrontiert wurden, mit eben dieser Antike; in einem (nur analytisch zu isolierenden) dritten Schritt konnten sie so Parallelen zwischen der Fremde und dem Eigenen hervorheben und wechselseitige kulturelle Aneignungen (Transformationen) einleiten und rechtfertigen. Der Artikel schlägt eine weitere Ausarbeitung der „doppelten Allelopoiese“ als analytisches Instrument für die Erforschung der cultural brokers vor.}},
author = {{Schönhärl, Korinna}},
issn = {{2196-680X}},
journal = {{Historische Zeitschrift}},
keywords = {{History}},
number = {{2}},
pages = {{285--305}},
publisher = {{Walter de Gruyter GmbH}},
title = {{{„Wie tief der kern dieses Volkes dem antiken wesen verwandt ist“ „Cultural Brokers“ und ihre Strategien zur Vermittlung des Unbekannten}}},
doi = {{10.1515/hzhz-2020-0009}},
volume = {{310}},
year = {{2020}},
}
@article{29361,
author = {{Schönhärl, Korinna}},
journal = {{Südosteuropa Mitteilungen}},
number = {{1-2}},
pages = {{67--82}},
title = {{{Das griechische Referendum von 2015 über die Konditionen der Euro-Gruppe}}},
volume = {{60}},
year = {{2020}},
}
@inproceedings{29546,
author = {{Maslovskaya, Sofya and Caillau, Jean-Baptiste and Djema, Walid and Giraldi, Laetitia and Jean-Luc, Jean-Luc and Pomet, Jean-Baptiste}},
title = {{{The turnpike property in maximization of microbial metabolite production}}},
year = {{2020}},
}
@article{29246,
abstract = {{Openness in science and education is increasing in importance within the digital knowledge society. So far, less attention has been paid to teaching Open Science in bachelor’s degrees or in qualitative methods. Therefore, the aim of this article is to use a seminar example to explore what Open Science practices can be taught in qualitative research and how digital tools can be involved. The seminar focused on the following practices: Open data practices, the practice of using the free and open source tool “Collaborative online Interpretation, the practice of participating, cooperating, collaborating and contributing through participatory technologies and in social (based) networks. To learn Open Science practices, the students were involved in a qualitative research project about “Use of digital technologies for the study and habitus of students”. The study shows the practices of Open Data are easy to teach, whereas the use of free and open source tools and participatory technologies for collaboration, participation, cooperation and contribution is more difficult. In addition, a cultural shift would have to take place within German universities to promote Open Science practices in general.}},
author = {{Steinhardt, Isabel}},
issn = {{0167-8329}},
journal = {{Education for Information}},
keywords = {{Open Science, Open Education Practices, Library and Information Sciences, Education, Information Systems}},
number = {{3}},
pages = {{263--279}},
publisher = {{IOS Press}},
title = {{{Learning Open Science by doing Open Science. A reflection of a qualitative research project-based seminar}}},
doi = {{10.3233/efi-190308}},
volume = {{36}},
year = {{2020}},
}
@article{35328,
author = {{Wortmann, Martin and Frese, Natalie and Keil, Waldemar and Brikmann, Johannes and Biedinger, Jan and Brockhagen, Bennet and Reiss, Günter and Schmidt, Claudia and Gölzhäuser, Armin and Moritzer, Elmar and Hüsgen, Bruno}},
issn = {{2637-6105}},
journal = {{ACS Applied Polymer Materials}},
keywords = {{Organic Chemistry, Polymers and Plastics, Process Chemistry and Technology}},
number = {{11}},
pages = {{4719--4732}},
publisher = {{American Chemical Society (ACS)}},
title = {{{The Deterioration Mechanism of Silicone Molds in Polyurethane Vacuum Casting}}},
doi = {{10.1021/acsapm.0c00744}},
volume = {{2}},
year = {{2020}},
}
@article{24743,
author = {{Stender, Jana and Vogelsang, Christoph and Watson, Christina and Schaper, Niclas}},
isbn = {{978-3-8340-2103-8}},
journal = {{Jahrbuch für Allgemeine Didaktik (JfAD) }},
pages = {{18--39}},
publisher = {{Schneider Verlag Hohengehren}},
title = {{{Reflexion von (eigenem oder fremdem) Klassenführungsverhalten angehender Lehrpersonen. Eine Untersuchung im Kontext von Unterrichtssimulationen im Lehramtsstudium.}}},
year = {{2020}},
}
@article{24744,
abstract = {{ Zusammenfassung. Längsschnittstudien, die das bildungswissenschaftliche Wissen als Teil der professionellen Kompetenz angehender Lehrkräfte über mehr als zwei Messzeitpunkte erfassen und den Einfluss individueller Eingangsvoraussetzungen auf die Wissensentwicklung untersuchen, stellen nach wie vor ein Forschungsdesiderat dar. Bisherige Studien liefern erste Hinweise darauf, dass individuelle Eingangsvoraussetzungen wie die Abiturnote, pädagogische Vorerfahrungen und Berufswahlmotive im Zusammenhang mit der Wissensentwicklung stehen und günstige Eingangsvoraussetzungen den Entwicklungsverlauf fördern können. Bislang ist unklar, wie sich das Wissen über den gesamten Studienverlauf in den Bachelor-/Master-Strukturen entwickelt. Des Weiteren ist auch unklar, inwieweit bestimmte Eingangsvoraussetzungen langfristige Entwicklungsverläufe erklären können. In der vorliegenden Studie wurden die Daten von 276 Studierenden, dessen Wissen zu fünf Messzeitpunkten erhoben wurde, mit Hilfe latenter Wachstumskurvenmodelle ausgewertet. Die Ergebnisse bestätigten einen Zuwachs des bildungswissenschaftlichen Wissens über den gesamten Studienverlauf. Den größten Wissenszuwachs erfuhren die Studierenden in den ersten zwei Semestern ihres Bachelorstudiums und beim Übergang in das Masterstudium. Des Weiteren konnte der Einfluss von individuellen kognitiven und motivationalen Eingangsvoraussetzungen auf den Leistungszuwachs bestätigt werden. So zeigte sich, dass Studierende, die eine bessere Abiturnote aufwiesen und bereits über eine unterrichtsnahe pädagogische Vorerfahrung verfügten, höhere Wissenszuwächse im Vergleich zu ihren Kommilitoninnen und Kommilitonen erfuhren, die einen schlechteren Abiturnotendurchschnitt hatten. Ebenfalls begünstigte das Motiv „mit Kindern und Jugendlichen arbeiten zu wollen“ die Wissensentwicklung. Die Ergebnisse können insbesondere für die Beratung genutzt werden, um die Motivlagen von Studierenden zu erfassen und sie dafür sensibel zu machen, welche Motivkonstellationen für einen erfolgreichen Studienverlauf günstig erscheinen. }},
author = {{Watson, Christina and Stender, Jana and Schaper, Niclas}},
issn = {{1010-0652}},
journal = {{Zeitschrift für Pädagogische Psychologie}},
pages = {{1--16}},
title = {{{Kompetenzentwicklung im bildungswissenschaftlichen Studium: Der Einfluss individueller Voraussetzungen auf die Entwicklung des bildungswissenschaftlichen Wissens angehender Lehrkräfte}}},
doi = {{10.1024/1010-0652/a000288}},
year = {{2020}},
}
@proceedings{35618,
editor = {{Fechner, Sabine and Verhoeff, Roald}},
location = {{Bologna, Italy}},
pages = {{301--302}},
publisher = {{University of Bologna}},
title = {{{Science Teaching Processes (strand 3). In Levrini, O. & Tasquier, G. (eds.), The beauty and pleasure of understanding: engaging with contemporary challenges through science education. Electronic Proceedings of the ESERA 2019 Conference. }}},
year = {{2020}},
}
@article{16301,
author = {{Atorf, Bernhard and Mühlenbernd, Holger and Zentgraf, Thomas and Kitzerow, Heinz-Siegfried}},
issn = {{1094-4087}},
journal = {{Optics Express}},
number = {{6}},
pages = {{8898--8908}},
title = {{{All-optical switching of a dye-doped liquid crystal plasmonic metasurface}}},
doi = {{10.1364/oe.383877}},
volume = {{28}},
year = {{2020}},
}