TY  - JOUR
A1  - Wiegner, Jonas
A1  - Volker, Hanno
A1  - Mainz, Fabian
A1  - Backes, Andreas
A1  - Loeken, Michael
A1  - Hüning, Felix
T1  - Energy analysis of a wireless sensor node powered by a Wiegand sensor
JF  - Journal of Sensors and Sensor Systems (JSSS)
N2  - This article describes an Internet of things (IoT) sensing device with a wireless interface which is powered by the energy-harvesting method of the Wiegand effect. The Wiegand effect, in contrast to continuous sources like photovoltaic or thermal harvesters, provides small amounts of energy discontinuously in pulsed mode. To enable an energy-self-sufficient operation of the sensing device with this pulsed energy source, the output energy of the Wiegand generator is maximized. This energy is used to power up the system and to acquire and process data like position, temperature or other resistively measurable quantities as well as transmit these data via an ultra-low-power ultra-wideband (UWB) data transmitter. A proof-of-concept system was built to prove the feasibility of the approach. The energy consumption of the system during start-up was analysed, traced back in detail to the individual components, compared to the generated energy and processed to identify further optimization options. Based on the proof of concept, an application prototype was developed.
Y1  - 2023
U6  - https://doi.org/10.5194/jsss-12-85-2023
SN  - 2194-878X
N1  - Corresponding author: Felix Hüning
VL  - 12
IS  - 1
SP  - 85
EP  - 92
PB  - Copernicus Publ.
CY  - Göttingen
ER  - 
TY  - BOOK
A1  - Drumm, Christian
A1  - Scheuermann, Bernd
A1  - Weidner, Stefan
T1  - Einstieg in SAP S/4HANA® : Geschäftsprozesse, Anwendungen, Zusammenhänge – Erklärt am Beispielunternehmen Global Bike
N2  - Dieser verständliche Einstieg in SAP S/4HANA führt Sie anhand des Beispielunternehmens Global Bike durch die zentralen Abläufe in Vertrieb, Einkauf, Rechnungswesen, Produktion und Lagerverwaltung. Sie werden mit den betriebswirtschaftlichen Grundlagen, den relevanten Organisationsstrukturen und Stammdaten sowie den Prozessen vertraut gemacht. Mithilfe von Praxisbeispielen und Fallstudien sind Sie schon bald SAP-S/4HANA-Profi – für mehr Erfolg in Studium und Beruf!
Y1  - 2023
SN  - 9783836281560 (Print)
SN  - 9783836281584 (E-Book)
N1  - Unter der Signatur 21 QGT 220 in der Bibliothek Eupener Straße vorhanden.
PB  - Rheinwerk Verlag
CY  - Bonn
ER  - 
TY  - CHAP
A1  - Chircu, Alina
A1  - Czarnecki, Christian
A1  - Friedmann, Daniel
A1  - Pomaskow, Johanna
A1  - Sultanow, Eldar
T1  - Towards a Digital Twin of Society
T2  - Proceedings of the 56th Hawaii International Conference on System Sciences 2023
N2  - This paper describes the potential for developing a digital twin of society- a dynamic model that can be used to observe, analyze, and predict the evolution of various societal aspects. Such a digital twin can help governmental agencies and policy makers in interpreting trends, understanding challenges, and making decisions regarding investments or policies necessary to support societal development and ensure future prosperity. The paper reviews related work regarding the digital twin paradigm and its applications. The paper presents a motivating case study- an analysis of opportunities and challenges faced by the German federal employment agency, Bundesagentur f¨ur Arbeit (BA), proposes solutions using digital twins, and describes initial proofs of concept for such solutions.
KW  - Digital twin
KW  - Digital transformation
KW  - Prototype
KW  - Society
KW  - Stress testing
Y1  - 2023
SN  - 978-0-9981331-6-4
N1  - 56th Hawaii International Conference on System Sciences, HICSS 2023, Maui, Hawaii, USA, January 3-6, 2023
SP  - 6748
EP  - 6757
PB  - University of Hawai'i
CY  - Honolulu
ER  - 
TY  - JOUR
A1  - Gaigall, Daniel
ED  - AitSahlia, Farid
T1  - Allocating and forecasting changes in risk
JF  - Journal of risk
N2  - We consider time-dependent portfolios and discuss the allocation of changes in the risk of a portfolio to changes in the portfolio’s components. For this purpose we adopt established allocation principles. We also use our approach to obtain forecasts for changes in the risk of the portfolio’s components. To put the approach into practice we present an implementation based on the output of a simulation. Allocation is illustrated with an example portfolio in the context of Solvency II. The quality of the forecasts is investigated with an empirical study.
KW  - portfolio risk
KW  - allocation
KW  - forecast
KW  - covariance principle
KW  - conditional expectation principle
Y1  - 2023
U6  - https://doi.org/10.21314/JOR.2022.048
SN  - 1755-2842
SN  - 1465-1211
VL  - 25
IS  - 3
SP  - 1
EP  - 24
PB  - Infopro Digital Risk
CY  - London
ER  - 
TY  - JOUR
A1  - Gaigall, Daniel
T1  - On the applicability of several tests to models with not identically distributed random effects
JF  - Statistics : A Journal of Theoretical and Applied Statistics
N2  - We consider Kolmogorov–Smirnov and Cramér–von-Mises type tests for testing central symmetry, exchangeability, and independence. In the standard case, the tests are intended for the application to independent and identically distributed data with unknown distribution. The tests are available for multivariate data and bootstrap procedures are suitable to obtain critical values. We discuss the applicability of the tests to random effects models, where the random effects are independent but not necessarily identically distributed and with possibly unknown distributions. Theoretical results show the adequacy of the tests in this situation. The quality of the tests in models with random effects is investigated by simulations. Empirical results obtained confirm the theoretical findings. A real data example illustrates the application.
KW  - central symmetry test
KW  - exchangeability test
KW  - independence test
KW  - random effects
KW  - not identically distributed
Y1  - 2023
SN  - 0323-3944
U6  - https://doi.org/10.1080/02331888.2023.2193748
SN  - 1029-4910
VL  - 57
PB  - Taylor & Francis
CY  - London
ER  - 
TY  - JOUR
A1  - Pfaff, Raphael
A1  - Babilon, Katharina
T1  - Railway Challenge - moderne Auflage der Rainhill Trials?
JF  - Eisenbahntechnische Rundschau : ETR ; Impulsgeber für das System Bahn
N2  - Die IMechE Railway Challenge wird jährlich in Stapleford, Großbritannien ausgetragen. Im Rahmen der Challenge entwickeln und bauen Studierende eine Lokomotive und vergleichen sich in verschiedenen Disziplinen, darunter eine automatisierte Zielbremsung, optimale Energierückgewinnung beim Bremsen und minimale Geräuschemissionen. Neben diesen und weiteren technischen Wettbewerbsdisziplinen treten die Fahrzeuge und die Teams auch in nicht-technischen Disziplinen wie einer Business Case Challenge an.
Y1  - 2023
SN  - 0013-2845
N1  - Homepageveröffentlichung unbefristet genehmigt für Fachhochschule Aachen / Rechte für einzelne Downloads und Ausdrucke für Besucher der Seiten genehmigt / © DVV Media Group GmbH
VL  - 2023
IS  - 4
SP  - 55
EP  - 58
PB  - DVV Media Group
CY  - Hamburg
ER  - 
TY  - JOUR
A1  - Gaigall, Daniel
A1  - Gerstenberg, Julian
T1  - Cramér-von-Mises tests for the distribution of the excess over a confidence level
JF  - Journal of Nonparametric Statistics
N2  - The Cramér-von-Mises distance is applied to the distribution of the excess over a confidence level. Asymptotics of related statistics are investigated, and it is seen that the obtained limit distributions differ from the classical ones. For that reason, quantiles of the new limit distributions are given and new bootstrap techniques for approximation purposes are introduced and justified. The results motivate new one-sample goodness-of-fit tests for the distribution of the excess over a confidence level and a new confidence interval for the related fitting error. Simulation studies investigate size and power of the tests as well as coverage probabilities of the confidence interval in the finite sample case. A practice-oriented application of the Cramér-von-Mises tests is the determination of an appropriate confidence level for the fitting approach. The adoption of the idea to the well-known problem of threshold detection in the context of peaks over threshold modelling is sketched and illustrated by data examples.
KW  - Cramér-von-Mises test
KW  - conditional excess distribution
KW  - confidence interval
KW  - goodness-of-fit test
Y1  - 2023
U6  - https://doi.org/10.1080/10485252.2023.2173958
SN  - 1048-5252 (Print)
SN  - 1029-0311 (Online)
PB  - Taylor & Francis
ER  - 
TY  - JOUR
A1  - Liphardt, Anna-Maria
A1  - Fernandez-Gonzalo, Rodrigo
A1  - Albracht, Kirsten
A1  - Rittweger, Jörn
A1  - Vico, Laurence
T1  - Musculoskeletal research in human space flight – unmet needs for the success of crewed deep space exploration
JF  - npj Microgravity
N2  - Based on the European Space Agency (ESA) Science in Space Environment (SciSpacE) community White Paper “Human Physiology – Musculoskeletal system”, this perspective highlights unmet needs and suggests new avenues for future studies in musculoskeletal research to enable crewed exploration missions. The musculoskeletal system is essential for sustaining physical function and energy metabolism, and the maintenance of health during exploration missions, and consequently mission success, will be tightly linked to musculoskeletal function. Data collection from current space missions from pre-, during-, and post-flight periods would provide important information to understand and ultimately offset musculoskeletal alterations during long-term spaceflight. In addition, understanding the kinetics of the different components of the musculoskeletal system in parallel with a detailed description of the molecular mechanisms driving these alterations appears to be the best approach to address potential musculoskeletal problems that future exploratory-mission crew will face. These research efforts should be accompanied by technical advances in molecular and phenotypic monitoring tools to provide in-flight real-time feedback.
Y1  - 2023
U6  - https://doi.org/10.1038/s41526-023-00258-3
SN  - 2373-8065
VL  - 9
IS  - Article number: 9
SP  - 1
EP  - 9
PB  - Springer Nature
ER  - 
TY  - CHAP
A1  - Eggert, Mathias
A1  - Moulen, Tobias
ED  - D'Onofrio, Sara
ED  - Meinhardt, Stefan
T1  - Auswahl von Geschäftsprozessen zur Anwendung von Robotic Process Automation – Vergleich relevanter Kriterien aus Theorie und Praxis
T2  - Robotik in der Wirtschaftsinformatik
N2  - Die Auswahl der passenden Geschäftsprozesse für eine Automatisierung mittels Robotic Process Automation (RPA) ist für den Erfolg von RPA-Projekten entscheidend. Das vorliegende Kapitel liefert dafür Selektionskriterien, die aus einer qualitativen Studie mit elf interviewten RPA-Experten aus dem Versicherungsumfeld resultieren. Das Ergebnis umfasst eine gewichtete Liste von sieben Dimensionen und 51 Prozesskriterien, welche die Automatisierung mit Softwarerobotern begünstigen beziehungsweise deren Nichterfüllung eine Umsetzung erschweren oder sogar verhindern. Die drei wichtigsten Kriterien zur Auswahl von Geschäftsprozessen für die Automatisierung mittels RPA umfassen die Entlastung der an dem Prozess mitwirkenden Mitarbeiter (Arbeitnehmerentlastung), die Ausführbarkeit des Prozesses mittels Regeln (Regelbasierte Prozessteuerung) sowie ein positiver Kosten-Nutzen-Vergleich. Auf diesen Ergebnissen aufbauend wird ein Vergleich mit den bereits bekannten Selektionskriterien aus der Literatur erstellt und diskutiert. Praktiker können die Ergebnisse verwenden, um eine systematische Auswahl von RPA-relevanten Prozessen vorzunehmen. Aus wissenschaftlicher Perspektive stellen die Ergebnisse eine Grundlage zur Erklärung des Erfolgs und Misserfolgs von RPA-Projekten dar.
KW  - Experteninterviews
KW  - Prozessauswahl
KW  - Selektionskriterien
KW  - Prozessverbesserung
KW  - Prozessautomatisierung
KW  - Robotic Process Automation
Y1  - 2023
SN  - 978-3-658-39620-6 (Print)
SN  - 978-3-658-39621-3 (Online)
N1  - Vollständig überarbeiteter und erweiterter Beitrag basierend auf Eggert M, Moulen T (2020) Selektion von Geschäftsprozessen zur Anwendung von Robotic Process Automation am Beispiel einer Versicherung, 57(5):1150–1162
SP  - 107
EP  - 129
PB  - Springer Vieweg
CY  - Wiesbaden
ER  - 
TY  - CHAP
A1  - Eggert, Mathias
A1  - Zähl, Philipp M.
A1  - Wolf, Martin R.
A1  - Haase, Martin
ED  - Cooper, Kendra M.L.
ED  - Bucchiarone, Antonio
T1  - Applying leaderboards for quality improvement in software development projects
T2  - Software Engineering for Games in Serious Contexts
N2  - Software development projects often fail because of insufficient code quality. It is now well documented that the task of testing software, for example, is perceived as uninteresting and rather boring, leading to poor software quality and major challenges to software development companies. One promising approach to increase the motivation for considering software quality is the use of gamification. Initial research works already investigated the effects of gamification on software developers and come to promising. Nevertheless, a lack of results from field experiments exists, which motivates the chapter at hand. By conducting a gamification experiment with five student software projects and by interviewing the project members, the chapter provides insights into the changing programming behavior of information systems students when confronted with a leaderboard. The results reveal a motivational effect as well as a reduction of code smells.
KW  - Leaderboard
KW  - Gamification
KW  - Software testing
KW  - Software development
Y1  - 2023
SN  - 978-3-031-33337-8 (Print)
SN  - 978-3-031-33338-5 (Online)
U6  - https://doi.org/10.1007/978-3-031-33338-5_11
SP  - 243
EP  - 263
PB  - Springer
CY  - Cham
ER  -