TY - JOUR
AU - Glöckner, Helge
ID - 34795
IS - 1
JF - Mathematische Nachrichten
SN - 0025-584X
TI - Direct limits of regular Lie groups
VL - 294
ER -
TY - GEN
AB - Let $G$ be a Lie group over a totally disconnected local field and $\alpha$
be an analytic endomorphism of $G$. The contraction group of $\alpha$ ist the
set of all $x\in G$ such that $\alpha^n(x)\to e$ as $n\to\infty$. Call sequence
$(x_{-n})_{n\geq 0}$ in $G$ an $\alpha$-regressive trajectory for $x\in G$ if
$\alpha(x_{-n})=x_{-n+1}$ for all $n\geq 1$ and $x_0=x$. The anti-contraction
group of $\alpha$ is the set of all $x\in G$ admitting an $\alpha$-regressive
trajectory $(x_{-n})_{n\geq 0}$ such that $x_{-n}\to e$ as $n\to\infty$. The
Levi subgroup is the set of all $x\in G$ whose $\alpha$-orbit is relatively
compact, and such that $x$ admits an $\alpha$-regressive trajectory
$(x_{-n})_{n\geq 0}$ such that $\{x_{-n}\colon n\geq 0\}$ is relatively
compact. The big cell associated to $\alpha$ is the set $\Omega$ of all all
products $xyz$ with $x$ in the contraction group, $y$ in the Levi subgroup and
$z$ in the anti-contraction group. Let $\pi$ be the mapping from the cartesian
product of the contraction group, Levi subgroup and anti-contraction group to
$\Omega$ which maps $(x,y,z)$ to $xyz$. We show: $\Omega$ is open in $G$ and
$\pi$ is \'{e}tale for suitable immersed Lie subgroup structures on the three
subgroups just mentioned. Moreover, we study group-theoretic properties of
contraction groups and anti-contraction groups.
AU - Glöckner, Helge
ID - 34806
T2 - arXiv:2101.02981
TI - Contraction groups and the big cell for endomorphisms of Lie groups over local fields
ER -
TY - CHAP
AU - Zierau, Cornelia
ED - Tahiri, Naima
ED - Laasri, Mohammed
ED - El Mtouni, Said
ED - Jai-Mansouri, Rachid
ID - 33746
T2 - Germanistik und DaF in mehrsprachigen Kontexten. Sprachdidaktische, interkulturelle und systemorientierte Perspektiven
TI - „welt-strolch macht links-shreibreform“ – Sprach- und Kulturreflexionen mit literarischen Texten in den Studiengängen Deutsch als Fremd- und Zweitsprache am Beispiel des deutsch-brasilianischen Autors Zé do Rock
ER -
TY - JOUR
AB - Nowadays, the production of modern lightweight structures, like a body in white structure requires a wide variety of mechanical joining processes. To fulfill the various demands, mechanical joining processes and joining elements (JE) are used. Very often, they are adapted to the application, which leads in turn to a numerous of different variants, high costs, and loss of the process chain versatility. To overcome this drawback, an innovative approach is the usage of individually produced and task-adapted JE, the so-called friction spun joint connectors (FSJC). These connectors can be modified in shape as well as in material properties. This flexibility offers high potential for lightweight design but also increases the necessary analytical effort regarding the forming process as well as the manufactured joint's properties. Therefore, a new analysis strategy based on the Finite-Element-Method (FEM) is proposed, which numerically determines the local load bearing capacity within a given joint in order to identify the critical regions for load transfer. The process of joining element manufacturing and the analysis strategy will be described in detail and optimization results of the joints are shown. Numerical results are discussed and possible recommendations for joint manufacturing are derived.
AU - Wischer, Christian
AU - Steinfelder, Christian
AU - Homberg, Werner
AU - Brosius, Alexander
ID - 30649
JF - IOP Conference Series: Materials Science and Engineering
TI - Joining with Friction Spun Joint Connectors – Manufacturing and Analysis
VL - 1157
ER -
TY - JOUR
AU - Wischer, Christian
AU - Homberg, Werner
ID - 30702
JF - Production Engineering
TI - A contribution on versatile process chains: joining with adaptive joining elements, formed by friction spinning
ER -
TY - GEN
AU - Süßmann, Johannes
ED - Butzer, Günter
ED - Jacob, Joachim
ID - 35027
SN - 978-3-476-04944-5
T2 - Metzler Lexikon literarischer Symbole
TI - [Art.] Donau
ER -
TY - GEN
AU - Süßmann, Johannes
ID - 35066
TI - Mariemont – Modernismus und Erinnerung. Videographierter Vortrag für den 5. Belgientag des Belgienzentrums Paderborn ›Belgien – Pralle Kunst des Lebens‹ am 18. Mai 2021
ER -
TY - GEN
AU - Süßmann, Johannes
ED - Jacob, Joachim
ED - Süßmann, Johannes
ID - 34980
SN - 978-90-04-33935-4
T2 - The Reception of Antiquity in the Age of Enlightenment. English Edition ed. by Christina C. Harker. Translated by Duncan Alexander Smart
TI - [Art.] Greek/Roman antithesis
VL - 12
ER -
TY - GEN
AU - Süßmann, Johannes
ED - Jacob, Joachim
ED - Süßmann, Johannes
ID - 34978
SN - 978-90-04-33935-4
T2 - The Reception of Antiquity in the Age of Enlightenment. English Edition ed. by Christina C. Harker. Translated by Duncan Alexander Smart
TI - [Art.] History, models of
VL - 12
ER -
TY - BOOK
ED - Jacob, Joachim
ED - Süßmann, Johannes
ID - 34993
SN - 978-90-04-33935-4
TI - The Reception of Antiquity in the Age of Enlightenment. English edition ed. by Christina C. Harker. Translated by Duncan Alexander Smart
VL - 12
ER -
TY - THES
AB - In den letzten Jahren haben sich Software-Ökosysteme als neue, erfolgreiche Geschäftsform etabliert. Unternehmen agieren hierbei als Anbieter von Software-Plattformen, auf denen Drittanbieter Softwarelösungen für den Markt anbieten können. Etablierte Beispiele sind hierbei sogenannte App-Stores, die z.B. von Google oder Apple angeboten werden.
Beim Aufbau von Software-Ökosystemen müssen vom Plattformanbieter viele architektonische Entwurfsentscheidungen getroffen werden. Bisher gibt es keine Architekturrichtlinien und -werkzeuge, die den Entwurf einer Ökosystemarchitektur unterstützen. Dadurch fehlt hier systematisches, wiederverwendbares Wissen. Plattformanbieter müssen auf ad-hoc Entscheidungen zurückgreifen. Dies kann dann zu Problemen im Betrieb der Software-Plattformen führen, zu erhöhten Ausfallrisiken und Mehrkosten.
Der Mangel an Architekturwissen manifestiert sich konkret in zwei Gruppen von Herausforderungen: Erstens fehlt eine Wissensbasis zu Architekturalternativen und zweitens fehlt es an methodischem Wissen zu Entwicklung und Betrieb von Software-Ökosystemen. Eine Architekturwissensbasis würde Orientierungshilfen zu den Bestandteilen von Software-Ökosystemen und deren Abhängigkeiten geben, während methodisches Wissen die Erstellung dieser Systeme erleichtern würde.
In der Dissertation werden diese Herausforderungen durch die Entwicklung des Frameworks SecoArc für die Modellierung von Software-Ökosystemen angegangen. Der Beitrag der Dissertation ist zweifach:
1. Das SecoArc-Framework umfasst eine Architekturwissensbasis, die wiederverwendbare Architekturentwurfsentscheidungen
von Software-Ökosystemen enthält. Die Wissensbasis wurde entwickelt, indem das Architekturwissen bestehender Ökosysteme sowie aus existierender Fachliteratur ermittelt wurde und in einer Produktlinie für Software-Ökosysteme konsolidiert wurde. Die Produktlinie umfasst architektonische Gemeinsamkeiten und Variabilitäten von Software-Ökosystemen.
2. Das SecoArc-Framework liefert methodisches Wissen, um die Ökosystemarchitektur in Modellen zu entwerfen und zu analysieren. Dieses Wissen wurde entwickelt, indem drei Architekturmuster identifiziert wurden. Jedes Muster erfasst unterschiedliche Beziehungen zwischen architektonischen Entwurfsentscheidungen zu den Qualitätsmerkmalen einer Ökosystemgesundheit und der Erreichung von Geschäftszielen.
Die Architekturmuster und die Produktlinie wurden dazu genutzt, ein Modellierungsframework zu entwickeln und in Form eines Prototypen umzusetzen, welches einen Entwurfsprozess, eine Modellierungssprache und eine Architekturanalysetechnik umfasst. Es erleichtert das Modellieren, Analysieren und Vergleichen von Ökosystemarchitekturen.
Die Ergebnisse der Dissertation wurden im Rahmen von zwei Studien evaluiert. In der ersten Validierungsstudie wurden das Framework sowie der Prototyp verwendet, um zwei alternative Ökosystemarchitekturen zu entwerfen und zu analysieren. In der zweiten Studie wurde eine Analyse von existierenden Ökosystemen basierend auf den architektonischen Variabilitäten des Frameworks durchgeführt.
AU - Schwichtenberg, Bahar
ID - 28683
KW - Enterprise Architecture
KW - Architectural Design Decisions
KW - Open Platforms
TI - Modeling and Analyzing Software Ecosystems
ER -
TY - BOOK
AU - Hansen, Christin
ID - 35070
TI - »Wilde« im deutschen Identitätsdiskurs 1830–1870. Spuren des Exotischen im nationalen Denken und in kolonialen Bildern
ER -
TY - JOUR
AB - As a formal theory, Bundesen’s theory of visual attention (TVA) enables the estimation of several theoretically meaningful parameters involved in attentional selection and visual encoding. As of yet, TVA has almost exclusively been used in restricted empirical scenarios such as whole and partial report and with strictly controlled stimulus material. We present a series of experiments in which we test whether the advantages of TVA can be exploited in more realistic scenarios with varying degree of stimulus control. This includes brief experimental sessions conducted on different mobile devices, computer games, and a driving simulator. Overall, six experiments demonstrate that the TVA parameters for processing capacity and attentional weight can be measured with sufficient precision in less controlled scenarios and that the results do not deviate strongly from typical laboratory results, although some systematic differences were found.
AU - Krüger, Alexander
AU - Tünnermann, Jan
AU - Stratmann, Lukas
AU - Briese, Lucas
AU - Dressler, Falko
AU - Scharlau, Ingrid
ID - 28691
JF - Open Psychology
SN - 2543-8883
TI - TVA in the wild: Applying the theory of visual attention to game-like and less controlled experiments
VL - 3
ER -
TY - JOUR
AB - Visual salience is a key component of attentional selection, the process that guards the scarce resources needed for conscious recognition and perception. In previous works, we proposed a measure of visual salience based on a formal theory of visual selection. However, the strength of visual salience depends on the time course as well as local physical contrasts. Evidence from multiple experimental designs in the literature suggests that the strength of salience rises initially and declines after approximately 150 ms. The present article amends the theory-based salience measure beyond local physical contrasts to the time course of salience. It does so through a first experiment which reveals that—contrary to expectations—salience is not reduced during the first 150 ms after onset. Instead, the overall visual processing capacity is severely reduced, which corresponds to a reduced processing speed of all stimuli in the visual field. A second experiment confirms this conclusion by replicating the result. We argue that the slower stimulus processing may have been overlooked previously because the attentional selection mechanism had not yet been modeled in studies on the time course of salience.
AU - Krüger, Alexander
AU - Scharlau, Ingrid
ID - 28686
JF - Psychological Research
SN - 0340-0727
TI - The time course of salience: not entirely caused by salience
ER -
TY - JOUR
AU - Weiß, D.
AU - Schramm, B.
AU - Kullmer, G.
ID - 30680
JF - Key Engineering Materials
TI - Numerical and Experimental Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X
VL - 883
ER -
TY - CONF
AB - Access to precise meteorological data is crucial to be able to plan and install renewable energy systems
such as solar power plants and wind farms. In case of solar energy, knowledge of local irradiance and air temperature
values is very important. For this, various methods can be used such as installing local weather stations or using
meteorological data from different organizations such as Meteonorm or official Deutscher Wetterdienst (DWD). An
alternative is to use satellite reanalysis datasets provided by organizations like the National Aeronautics and Space
Administration (NASA) and European Centre for Medium-Range Weather Forecasts (ECMWF). In this paper the
“Modern-Era Retrospective analysis for Research and Applications” dataset version 2 (MERRA-2) will be presented,
and its performance will be evaluated by comparing it to locally measured datasets provided by Meteonorm and DWD.
The analysis shows very high correlation between MERRA-2 and local measurements (correlation coefficients of 0.99)
for monthly global irradiance and air temperature values. The results prove the suitability of MERRA-2 data for
applications requiring long historical data. Moreover, availability of MERRA-2 for the whole world with an acceptable
resolution makes it a very valuable dataset.
AU - Khatibi, Arash
AU - Krauter, Stefan
ID - 24551
KW - Energy potential estimation
KW - Photovoltaic
KW - Solar radiation
KW - Temperature measurement
KW - Satellite data
KW - Meteonorm
KW - MERRA-2
KW - DWD
SN - 3-936338-78-7
T2 - Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)
TI - Comparison and Validation of Irradiance Data: Satellite Meteorological Dataset MERRA-2 vs. Meteonorm and German Weather Service (DWD)
ER -
TY - CONF
AB - Efficiencies and energy yields of microinverters available on the market during 2014‒2021 have been
measured, compared, and ranked. Conversion efficiencies as a function of load have been measured indoors with high
accuracy and ranked according to Euro- and CEC weightings. Energy yields have been measured outdoors via
identical and calibrated crystalline silicon PV modules of 215 Wp (until 2020) and 360 Wp (starting 2021). Inverters
with two inputs have been fed by two of those modules. DC input, AC power output and energy yield of each microinverter have been recorded by individual calibrated electricity meters. CEC and EU efficiency rankings have been
computed and compared. To assess the influence of PV module size, two extremes have been investigated: A rather
small module with 215 Wp - as it has been used 10 years ago, and a brand-new module (2021) offering 360 Wp. Both
types of modules contain 60 solar cells in series connection. Appling the low-power modules, the challenge for the
different micro-inverters has been during weak-light conditions, using the high-power modules, some inverters
temporarily reach their power limits and yield is reduced. A method using a reference configuration of inverter &
module and a linear equation y = ax + b resulting in the actual yield, any module & inverter configuration can be
characterized by just the coefficients a and b.
AU - Krauter, Stefan
AU - Bendfeld, Jörg
ID - 24550
KW - AC-modules
KW - Microinverter
KW - Power Conditioning
KW - Efficiency
KW - Yield
KW - PV module size
KW - saturation
KW - performance
SN - 3-936338-78-7
T2 - Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2021)
TI - Module-Inverters (Microinverters): Influence of Module Size on Conversion Efficiencies and Energy Yields
ER -
TY - JOUR
AB - Fast-growing energy demand of the world makes the researchers focus on finding new energy sources or optimizing already-developed approaches. For an efficient use of solar and wind energy in an energy system, correct design and sizing of a power system is of high importance and improving or optimizing the process of data obtaining for this purpose leads to higher performance and lower cost per unit of energy. It is essential to have the most precise possible estimation of solar and wind energy potential and other local weather parameters in order to fully feed the demand and avoid extra costs. There are various methods for obtaining local data, such as local measurements, official organizational data, satellite obtained, and reanalysis data. In this paper, the Modern-Era Retrospective analysis for Research and Applications dataset version 2 (MERRA-2) dataset provided by NASA is introduced and its performance is evaluated by comparison to various locally measured datasets offered by meteorological institutions such as Meteonorm and Deutscher Wetterdienst (DWD, or Germany’s National Meteorological Service) around the world. After comparison, correlation coefficients from 0.95 to 0.99 are observed for monthly global horizontal irradiance values. In the case of air temperature, correlation coefficients of 0.99 and for wind speed from 0.81 to 0.99 are observed. High correlation with ground measurements and relatively low errors are confirmed, especially for irradiance and temperature values, that makes MERRA-2 a valuable dataset, considering its world coverage and availability.
AU - Khatibi, Arash
AU - Krauter, Stefan
ID - 21265
IS - 4
JF - Energies
KW - Solar irradiance
KW - MERRA 2
KW - Meteonorm
KW - DWD
SN - 1996-1073
TI - Validation and Performance of Satellite Meteorological Dataset MERRA-2 for Solar and Wind Applications
VL - 14
ER -
TY - CONF
AU - Castenow, Jannik
AU - Götte, Thorsten
AU - Knollmann, Till
AU - Meyer auf der Heide, Friedhelm
ED - Johnen, C.
ED - Schiller, E.M.
ED - Schmid, S.
ID - 26986
T2 - Proceedings of the 23rd International Symposium on Stabilization, Safety, and Security of Distributed Systems, SSS 2021
TI - The Max-Line-Formation Problem – And New Insights for Gathering and Chain-Formation
VL - 13046
ER -
TY - JOUR
AB - As a complementary technology to existing Radio Frequency (RF)-based solutions such as Cellular V2X (C-V2X) and Dedicated Short Range Communication (DSRC), Vehicular VLC (V-VLC) is gaining more attention in the research community as well as in the industry. This paper introduces a complete IEEE 802.11 compliant V-VLC system. The system relies on Universal Software Radio Peripheral (USRP) software defined radios programmed using the GNU Radio framework, a typical car headlight plus a custom driver electronics for the high-power car LEDs (sender), and a photodiode (receiver). Building upon our earlier work, we, for the first time, experimentally explore the communication performance in outdoor scenarios, even in broad daylight, and show that rather simple optical modifications help to reduce the ambient noise to enable long distance visible light communication. Our system also supports Orthogonal Frequency-Division Multiplexing (OFDM) with a variety of Modulation and Coding Schemes (MCS) up to 64-QAM and is fully compliant with IEEE 802.11. We performed an extensive series of experiments to explore the performance of our system, even using higher order MCS in daylight. Our results demonstrated a high reliability for distances up to 75m with the presented system, regardless of the time of the day.
AU - Amjad, Muhammad Sohaib
AU - Tebruegge, Claas
AU - Memedi, Agon
AU - Kruse, Stephan
AU - Kress, Christian
AU - Scheytt, J. Christoph
AU - Dressler, Falko
ID - 29201
IS - 6
JF - IEEE Transactions on Vehicular Technology
TI - Towards an IEEE 802.11 Compliant System for Outdoor Vehicular Visible Light Communications
VL - 70
ER -
TY - JOUR
AB - This paper investigates an ultra-broadband sampling technique based on charge sampling using an Integrate-and-Hold Circuit (IHC) and ultra-short integration times. The charge sampling technique is mathematically analyzed in detail and compared to conventional switched-capacitor sampling. The mathematical analysis allows to predict the sampler bandwidth as well as the degradation of sampling precision due to analog circuit impairments such as integrator gain error, integration capacitor leakage, hold-mode droop, thermal noise, and clock jitter. Furthermore, design, simulation, and measurement results of an ultra-broadband charge sampler IC in SiGe BiCMOS technology are presented. The charge sampler IC achieves a 1dB bandwidth of 70 GHz. A resolution of better than 5.9 effective number of bits (ENOB) is measured from 0 to 70 GHz at a sampling rate of 5 GS/s. The results suggest that charge sampling using an IHC is a viable concept for ultra-broadband sampling.
AU - Wu, Liang
AU - Scheytt, J. Christoph
ID - 29210
IS - 9
JF - IEEE Transactions on Circuits and Systems I: Regular Papers
KW - Electrical and Electronic Engineering
SN - 1549-8328
TI - Analysis and Design of a Charge Sampler With 70-GHz 1-dB Bandwidth in 130-nm SiGe BiCMOS
VL - 68
ER -
TY - JOUR
AU - Knorr, Karin
AU - Hein-Pensel, Franziska
ID - 29242
IS - 1
JF - Academy of Management Proceedings
SN - 0065-0668
TI - Since Albert and Whetten: The Dissemination of their Conceptualization of Organizational Identity
VL - 2021
ER -
TY - JOUR
AU - Tönnies, Merle
AU - Sierz, Aleks
ID - 29244
IS - 1
JF - Journal of Contemporary Drama in English
TI - ‘Who’s Going to Mobilise Darkness and Silence?’ The Construction of Dystopian Spaces in Contemporary British Drama
VL - 9
ER -
TY - JOUR
AU - Fakha, Nadja
ID - 29262
IS - 7
JF - die hochschullehre
TI - Promoting Critical Thinking in Literary and Cultural Studies
ER -
TY - CONF
AB - The circuit design and measurement results of a mixed-signal receiver baseband circuit for a wireless high data rate communication system are presented. The circuit design of the two most important system blocks of the sliced receiver baseband architecture, namely the broadband, programmable code-generator circuit, and the integrate and dump correlator circuit are explained. Using parallel sequence spread spectrum (PSSS) with PAM-4 modulated data, a net data rate of 2.22 Gbps is demonstrated with a single receiver baseband slice circuit working with a chip rate of 20 Gcps. A total of 15 slices are required to recover all 15 parallelly transmitted symbols resulting in the net data rate of 33.33 Gbps. This is the first reported implementation of a mixed-signal PSSS baseband circuit.
AU - Javed, Abdul Rehman
AU - Scheytt, J. Christoph
ID - 29217
T2 - 2021 IEEE International Midwest Symposium on Circuits and Systems (MWSCAS)
TI - Mixed-Signal Receiver Baseband Slice for High-Data-Rate Communication Using 130 nm SiGe BiCMOS Technology
ER -
TY - CONF
AB - An m-sequence radar with a high chip rate of 20 Gcps is presented that makes use of the large bandwidth available in the V-band (40-75 GHz) or at 240 GHz to reduce the detection resolution to 7.5 mm. Measurement results of a mixed-signal radar receiver baseband (BB) integrated circuit designed using 130 nm SiGe BiCMOS technology are presented along with a novel radar ranging concept for the mixed-signal radar BB.
AU - Javed, Abdul Rehman
AU - Scheytt, J. Christoph
ID - 29221
T2 - 2020 17th European Radar Conference (EuRAD)
TI - M-Sequence Radar for High Resolution Ranging with Mixed-Signal Radar Receiver Baseband Using 130nm SiGe BiCMOS Technology
ER -
TY - JOUR
AB - From the 1880s scientists developed methods to measure (dishonest) tax payment behaviour. The first part of this article provides an overview of these methods and their development. The second part enquires into the function of measuring methods in the societal discourse about (honest) tax payments. The tax morale research of Günter Schmölders, carried out in the 1950s and 1960s, is then examined as a case study. The focus of interest is on the political advice that Schmölders gave, as based on his empirical results, and on the ideal image of the citizen and society which underlay the scientific method.
AU - Schönhärl, Korinna
ID - 29214
IS - 2
JF - Jahrbuch für Wirtschaftsgeschichte / Economic History Yearbook
KW - Economics and Econometrics
KW - History
SN - 2196-6842
TI - Steuerzahlverhalten quantifizieren
VL - 62
ER -
TY - JOUR
AB - The following issue arose from a section at the Congress for Economic and Social History in Regensburg in March 2019 and focuses on fiscal conflicts in Europe from the early modern period until today. Distributive fiscal conflicts are seen here as a probe into the past which can increase our understanding of historical social structures. Fiscal history is analysed as a central arena of the modern state. The introduction provides an overview of current research into fiscal history in Germany and of the contributions presented in this focus issue.
AU - Schönhärl, Korinna
AU - Spoerer, Mark
ID - 29218
IS - 2
JF - Jahrbuch für Wirtschaftsgeschichte / Economic History Yearbook
KW - Economics and Econometrics
KW - History
SN - 2196-6842
TI - Einleitung: Staatsfinanzen und Konflikt
VL - 62
ER -
TY - CONF
AU - Bloh, Bea
AU - van Ophyusen, Stefanie
AU - Schürer, Sina
ID - 28375
TI - Die Gestaltung des Grundschulübergangs im Wandel? Längsschnittliche Analyse einer Grundschullehrkräftebefragung von 2002 vs. 2018.
ER -
TY - BOOK
AB -
Statistik für Einsteiger*innen
Die Autor*innen stellen hier grundlegende statistische Verfahren vor. Mit diesen Verfahren können bildungswissenschaftliche Fragestellungen über Zusammenhang, Unterschied oder Veränderung auf Basis von Stichprobendaten beantwortet werden.
Die statistischen Grundideen, Kennwerte und Verfahrensweisen werden kleinschrittig hergeleitet, sodass ein tiefes Verständnis für ihre Bedeutung erlangt wird.
Durch Übungsaufgaben wird das erlernte Wissen angewendet und gefestigt.
Selbst wenn Ihnen Mathematik nicht zufliegt, haben Sie nach der Erarbeitung dieses Buches keinen Grund mehr, Statistik zu fürchten, sondern werden Statistik als ein nützliches Werkzeug für Studium und Forschung zu schätzen wissen.
AU - van Ophuysen, Stefanie
AU - Fischer, Bernd
AU - Behrmann, Lars
AU - Bloh, Bea
ID - 27999
SN - 9783838555850
TI - Statistik verstehen, Band 1
ER -
TY - CONF
AU - Sander, Sascha
AU - Teutenberg, Dominik
AU - Meschut, Gerson
AU - Matzenmiller, Anton
ID - 21802
T2 - 21. Kolloquium Gemeinsame Forschung in der Klebtechnik
TI - Methodenentwicklung zur Langzeitprognose von Klebverbindungen bei kombinierter Temperatur- und Medieneinwirkung
ER -
TY - JOUR
AB - ZusammenfassungCoworking Spaces (CSPs) sind geteilte Arbeitsplätze für Selbstständige, Freelancer*innen, Mikrounternehmen und Startups, die Isolation entgegenwirken und zum interdisziplinären Wissensaustausch anregen können. Jedoch existieren auch Barrieren, die Nutzer*innen davon abhalten, zu anderen Coworker*innen Kontakt aufzunehmen, da oft unklar ist, wann und ob jemand zum kreativen Austausch oder zum Anbieten von Hilfe bereit ist. Durch die Covid-19 Pandemie wurde die Unsicherheit bei der gegenseitigen Kontaktaufnahme noch weiter erschwert und viele CSPs mussten zeitweise schließen. Um Barrieren bei der Kontaktaufnahme zu reduzieren und die interdisziplinäre Zusammenarbeit zu fördern, können Informations- und Kommunikationstechnologien eingesetzt werden. Virtual Reality (VR) und Augmented Reality (AR) sind Technologien, die sich durch einen besonders hohen Grad an Immersion und sozialer Präsenz auszeichnen. Deshalb zeigen wir in diesem Beitrag, wie VR- und AR-Technologien gezielt eingesetzt werden können, um den interdisziplinären Wissensaustausch und Zusammenarbeit sowohl in CSPs als auch ortsunabhängig zu fördern. Dazu präsentieren wir positive Effekte, die durch den Einsatz einer der beiden Technologien im Zusammenhang mit CSPs erzielt werden können und leiten konkrete Gestaltungsempfehlungen für Anwendungsentwickler*innen, Unternehmen sowie Betreiber*innen von CSPs ab. Diese Gestaltungsempfehlungen basieren sowohl auf den neuesten Erkenntnissen aus der Fachliteratur als auch auf Interviews mit Expert*innen aus Forschung und Praxis mit Erfahrung im Bereich CSPs, VR und AR. Unsere Anwendungsszenarien können Entwickler*innen, Unternehmen und Betreiber*innen von CSPs als Grundlage dienen, vom Einsatz beider Technologien zu profitieren.
AU - Mirbabaie, Milad
AU - Hofeditz, Lennart
AU - Schmid, Leon
ID - 29300
JF - HMD Praxis der Wirtschaftsinformatik
KW - General Earth and Planetary Sciences
KW - General Environmental Science
SN - 1436-3011
TI - Ausgestaltungs- und Anwendungspotenziale von Virtual und Augmented Reality Technologien im Kontext von Coworking Spaces
ER -
TY - JOUR
AB - ZusammenfassungDurch technologische Fortschritte in den letzten Jahren ist Virtual Reality erschwinglicher und benutzerfreundlicher geworden, sodass Unternehmen die Einführung der Technologie verstärkt in Betracht ziehen. Ihren Aufschwung erlebte die Technologie jedoch durch die Unterhaltungs- und Spieleindustrie, weshalb sich für Unternehmen die Frage nach sinnvollen Anwendungsfällen stellt. Nach der Affordance-Experimentation-Actualization-Theorie ist insbesondere bei neu aufkommenden Technologien eine Experimentierphase notwendig, um Handlungsmöglichkeiten aufzudecken und daraus Anwendungsfälle zu generieren. Dieser Artikel präsentiert die Ergebnisse einer Fallstudie in einem Unternehmen, das sich während der Studie in der Experimentierphase befand. Durch Interviews mit acht Beschäftigten und einem Vertriebspartner konnten drei Handlungsmöglichkeiten für Virtual Reality im Unternehmenskontext und eine zuvor nicht bekannte Aktivität der Experimentierphase identifiziert werden. Damit erweitert die Studie bisherige Forschung zur Experimentierphase und zeigt Unterschiede im Vergleich zu anderen innovativen Technologien auf, die in vorherigen Studien untersucht wurden. Für Unternehmen bietet die Studie wertvolle Einblicke in die erfolgreiche Gestaltung der Experimentierphase als Vorbereitung auf die Implementierung.
AU - Fromm, Jennifer
AU - Slawinski, Elena
AU - Mirbabaie, Milad
ID - 29301
JF - HMD Praxis der Wirtschaftsinformatik
KW - General Earth and Planetary Sciences
KW - General Environmental Science
SN - 1436-3011
TI - Affordance-Experimentation: Eine Fallstudie zur Entwicklung von Virtual-Reality-Anwendungsfällen im Unternehmenskontext
ER -
TY - CONF
AU - Zhang, Wangyou
AU - Boeddeker, Christoph
AU - Watanabe, Shinji
AU - Nakatani, Tomohiro
AU - Delcroix, Marc
AU - Kinoshita, Keisuke
AU - Ochiai, Tsubasa
AU - Kamo, Naoyuki
AU - Haeb-Umbach, Reinhold
AU - Qian, Yanmin
ID - 28256
T2 - ICASSP 2021 - 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
TI - End-to-End Dereverberation, Beamforming, and Speech Recognition with Improved Numerical Stability and Advanced Frontend
ER -
TY - CONF
AU - Li, Chenda
AU - Shi, Jing
AU - Zhang, Wangyou
AU - Subramanian, Aswin Shanmugam
AU - Chang, Xuankai
AU - Kamo, Naoyuki
AU - Hira, Moto
AU - Hayashi, Tomoki
AU - Boeddeker, Christoph
AU - Chen, Zhuo
AU - Watanabe, Shinji
ID - 28262
T2 - 2021 IEEE Spoken Language Technology Workshop (SLT)
TI - ESPnet-SE: End-To-End Speech Enhancement and Separation Toolkit Designed for ASR Integration
ER -
TY - CONF
AU - Li, Chenda
AU - Luo, Yi
AU - Han, Cong
AU - Li, Jinyu
AU - Yoshioka, Takuya
AU - Zhou, Tianyan
AU - Delcroix, Marc
AU - Kinoshita, Keisuke
AU - Boeddeker, Christoph
AU - Qian, Yanmin
AU - Watanabe, Shinji
AU - Chen, Zhuo
ID - 28261
T2 - 2021 IEEE Spoken Language Technology Workshop (SLT)
TI - Dual-Path RNN for Long Recording Speech Separation
ER -
TY - CHAP
AU - Mildorf, Jarmila
ED - Arteel, Inge
ED - Bernaerts, Lars
ED - Bluijs, Siebe
ED - Verhulst, Pim
ID - 29354
SN - 978-1-5261-5571-9
T2 - Tuning in to the Neo-Avantgarde: Experimental Radio Plays in the Postwar Period
TI - ‘Ja, ja, so schön klingt das Schreckliche’: An Audionarratological Analysis of Andreas Ammer and FM Einheit’s Lost & Found: Das Paradies
ER -
TY - GEN
AU - Mildorf, Jarmila
ID - 27372
IS - 1
T2 - European Journal of Scandinavian Studies
TI - Book review: Katharina Fürholzer: Das Ethos des Pathographen: Literatur- und medizinethische Dimensionen von Krankenbiographien. Heidelberg 2019.
VL - 51
ER -
TY - CHAP
AU - Mildorf, Jarmila
ED - Bernaerts, Lars
ED - Mildorf, Jarmila
ID - 26824
SN - 978-0-8142-1472-5
T2 - Audionarratology: Lessons from Radio Drama
TI - Auricularization and Narrative-Epistemic Stance in Louis Nowra’s Echo Point
ER -
TY - CHAP
AU - Bernaerts, Lars
AU - Mildorf, Jarmila
ED - Bernaerts, Lars
ED - Mildorf, Jarmila
ID - 29356
SN - 978-0-8142-1472-5
T2 - Audionarratology: Lessons from Radio Drama
TI - When Sounds Make Stories: Lessons for Narrative Theory from the Study of Radio Drama
ER -
TY - BOOK
ED - Schönhärl, Korinna
ED - Spoerer, Mark
ID - 29358
TI - Jahrbuch für Wirtschaftsgeschichte/Economic History Yearbook- Schwerpunktheft: Staatsfinanzen und Konflikt
VL - 62
ER -
TY - JOUR
AB - An approach for the non-destructive characterisation of adhesive bonds using guided ultrasonic waves is presented. Pulsed laser radiation is used to thermoacoustically excite broadband ultrasonic waves in a multi-layered sample, consisting of a metal plate adhesively joined to a polymeric layer using synthetic resin. The resulting signals are received by a purpose-built piezoelectric transducer. Varying the distance between excitation and detection yields spatio-temporal measurement data, from which the dispersive properties of the propagating waves can be inferred using a two-dimensional Fourier transform, assuming the plates to act as coupled waveguides. Coupled multi-layered waveguides show an effect referred to as mode repulsion, where the distance between certain modes in the frequency-wavenumber domain is assumed to be a measure of coupling strength. Measurements at different stages of curing of the adhesive layer are performed and evaluated. A comparison of the results shows changes in the dispersive properties, namely an increased modal bandwidth for the fully cured sample as well as an increased modal distance.
AU - Zeipert, Henning
AU - Claes, Leander
AU - Johannesmann, Sarah
AU - Lugovtsova, Yevgeniya
AU - Nicolai, Marcel
AU - Prager, Jens
AU - Henning, Bernd
ID - 27367
JF - at - Automatisierungstechnik
SN - 2196-677X
TI - An approach to adhesive bond characterisation using guided acoustic waves in multi-layered plates
ER -
TY - BOOK
ED - Mildorf, Jarmila
ED - Bernaerts, Lars
ID - 26816
KW - Narratology
KW - Audio Drama
SN - 978-0-8142-1472-5
TI - Audionarratology: Lessons from Radio Drama
ER -
TY - CHAP
AU - Schönhärl, Korinna
ED - Cassis, Youssef
ED - Schenk, Catherine
ID - 29381
T2 - Remembering and Learning from Financial Crises
TI - 'Unfortunately we are bankrupt': The Greek Bankruptcy Crisis of 1893 and its Remembrance in the World Economic Crisis 2010-11
ER -
TY - JOUR
AB - How did bankers make their investment decisions, for example to issue a state loan for a peripheral country? This in-depth case study investigates the question of the Greek loan of 1833, issued by Rothschilds. The main interest is to reconstruct James de Rothschild’s risk perception and decision making process, expressed in the argumentation vis-à-vis his family. The significance of the guarantee of the protecting powers, which was without precedent, is considered by James as well as the competitive situation on the bond market, the relationship of the Rothschilds with leading politicians of the time, and the special significance of Greece in the period of intensive European philhellenism. The paper argues that in-depth studies of bankers’ risk perception are necessary to illuminate the complexity of their decision-making.
AU - Schönhärl, Korinna
ID - 29216
IS - 4
JF - Business History
KW - History
KW - Business
KW - Management and Accounting (miscellaneous)
KW - Business and International Management
SN - 0007-6791
TI - Why does a prestigious emission house emit a loan for a peripheral state? The house of Rothschild and the Greek guaranteed loan of 1833
VL - 63
ER -
TY - CHAP
AU - Wiethoff, Christoph
AU - Westphal, Petra
ED - Völschow, Y.
ED - Kunze, K.
ID - 29319
T2 - Reflexion und Beratung in der Lehrerinnen- und Lehrerausbildung. Beiträge zur Professionalisierung von Lehrkräften
TI - Theoriebasierte Fallreflexion im Praxissemester
ER -
TY - JOUR
AB - Optical metasurfaces are perfect candidates for the phase and amplitude modulation of light, featuring an excellent basis for holographic applications. In this work, we present a dual amplitude holographic scheme based on the photon sieve principle, which is then combined with a phase hologram by utilizing the Pancharatnam–Berry phase. We demonstrate that two types of apertures, rectangular and square shapes in a gold film filled with silicon nanoantennas are sufficient to create two amplitude holograms at two different wavelengths in the visible, multiplexed with an additional phase-only hologram. The nanoantennas are tailored to adjust the spectral transmittance of the apertures, enabling the wavelength sensitivity. The phase-only hologram is implemented by utilizing the anisotropic rectangular structure. Interestingly, such three holograms have quantitative mathematical correlations with each other. Thus, the flexibility of polarization and wavelength channels can be utilized with custom-tailored features to achieve such amplitude and phase holography simultaneously without sacrificing any space-bandwidth product. The present scheme has the potential to store different pieces of information which can be displayed separately by switching the wavelength or the polarization state of the reading light beam.
AU - Frese, Daniel
AU - Sain, Basudeb
AU - Zhou, Hongqiang
AU - Wang, Yongtian
AU - Huang, Lingling
AU - Zentgraf, Thomas
ID - 26987
IS - 18
JF - Nanophotonics
SN - 2192-8614
TI - A wavelength and polarization selective photon sieve for holographic applications
VL - 10
ER -
TY - CONF
AU - Firmansyah, Asep Fajar
AU - Moussallem, Diego
AU - Ngonga Ngomo, Axel-Cyrille
ID - 29486
SN - 978-1-4503-8457-5
T2 - Proceedings of the 11th on Knowledge Capture Conference
TI - GATES: Using Graph Attention Networks for Entity Summarization
ER -
TY - CHAP
AU - Gausemeier, Jürgen
AU - Pierenkemper, Christoph
ED - Schallmo, Daniel R.
ED - Tidd, Joseph
ID - 27592
T2 - Digitalization – Approaches, Case Studies, and Tools for Strategy, Transformation and Implementation
TI - Developing Strategies for Digital Transformation in SMEs with Maturitiy Models
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Flachmann, Felix
ID - 26854
JF - Kunststoffe
TI - Die Fließfront darf nicht brechen
VL - 12
ER -