TY - JOUR
A1 - Lindemann, Markus
A1 - Runge, Alexander
T1 - Permanent IT-support in electronic commerce transactions
JF - Electronic markets : the international journal of networked business. Vol. 7 (1997), iss. 1
Y1 - 1997
SN - 1422-8890
SP - 18
EP - 20
ER -
TY - CHAP
A1 - Kunfermann, Philipp
A1 - Drumm, Christian
T1 - Lifting XML schemas to ontologies - the concept finder algorithm
T2 - MEDIATE 2005 First International Workshop on Mediation in Semantic Web Services Proceedings of the First International Workshop on Mediation in Semantic Web Services (MEDIATE 2005)
Y1 - 2005
SP - 113
EP - 122
ER -
TY - JOUR
A1 - Kroll-Ludwigs, Kathrin
T1 - The Reform of German Maintenance Law
JF - The International Survey of Family Law
Y1 - 2018
SP - 85
EP - 100
ER -
TY - CHAP
A1 - Kroll-Ludwigs, Kathrin
ED - Boele-Woelki, Katharina
T1 - Unification of Conflict of Laws in Europe. Matrimonial Property Regimes
T2 - European Challenges in Contemporary Family Law
Y1 - 2008
SN - 978-90-5095-692-5
SP - 379
EP - 393
PB - Intersentia
CY - Antwerpen
ER -
TY - CHAP
A1 - Kroll-Ludwigs, Kathrin
T1 - Names of individuals
T2 - European Encyclopedia of Private International Law
Y1 - 2017
SN - 9781782547228
PB - Edward Elgar Publishing
CY - Cheltenham, UK
ER -
TY - CHAP
A1 - Kroll-Ludwigs, Kathrin
T1 - Small Claims Regulation
T2 - European Encyclopedia of Private International Law
Y1 - 2017
SN - 9781782547228
PB - Edward Elgar Publishing
CY - Cheltenham, UK
ER -
TY - CHAP
A1 - Kroll-Ludwigs, Kathrin
ED - Calliess, Gralf-Peter
T1 - Art. 5 Rom III-Regulation (choice of applicable law by the parties)
T2 - Rome Regulations : commentary
Y1 - 2015
SN - 9789041147547
PB - Wolters Kluwer
ET - 2nd ed.
ER -
TY - CHAP
A1 - Kroll-Ludwigs, Kathrin
ED - Colliess, Gralf-Peter
T1 - Art. 7 Rome III-Regulation (formal validity)
T2 - Rome Regulations : commentary
Y1 - 2015
SN - 9789041147547
PB - Wolters Kluwer
ET - 2nd ed.
ER -
TY - CHAP
A1 - Kohl, Philipp
A1 - Freyer, Nils
A1 - Krämer, Yoka
A1 - Werth, Henri
A1 - Wolf, Steffen
A1 - Kraft, Bodo
A1 - Meinecke, Matthias
A1 - Zündorf, Albert
ED - Conte, Donatello
ED - Fred, Ana
ED - Gusikhin, Oleg
ED - Sansone, Carlo
T1 - ALE: a simulation-based active learning evaluation framework for the parameter-driven comparison of query strategies for NLP
T2 - Deep Learning Theory and Applications. DeLTA 2023. Communications in Computer and Information Science
N2 - Supervised machine learning and deep learning require a large amount of labeled data, which data scientists obtain in a manual, and time-consuming annotation process. To mitigate this challenge, Active Learning (AL) proposes promising data points to annotators they annotate next instead of a subsequent or random sample. This method is supposed to save annotation effort while maintaining model performance.
However, practitioners face many AL strategies for different tasks and need an empirical basis to choose between them. Surveys categorize AL strategies into taxonomies without performance indications. Presentations of novel AL strategies compare the performance to a small subset of strategies. Our contribution addresses the empirical basis by introducing a reproducible active learning evaluation (ALE) framework for the comparative evaluation of AL strategies in NLP.
The framework allows the implementation of AL strategies with low effort and a fair data-driven comparison through defining and tracking experiment parameters (e.g., initial dataset size, number of data points per query step, and the budget). ALE helps practitioners to make more informed decisions, and researchers can focus on developing new, effective AL strategies and deriving best practices for specific use cases. With best practices, practitioners can lower their annotation costs. We present a case study to illustrate how to use the framework.
KW - Active learning
KW - Query learning
KW - Natural language processing
KW - Deep learning
KW - Reproducible research
Y1 - 2023
SN - 978-3-031-39058-6 (Print)
SN - 978-3-031-39059-3 (Online)
U6 - http://dx.doi.org/978-3-031-39059-3
N1 - 4th International Conference, DeLTA 2023, Rome, Italy, July 13–14, 2023.
SP - 235
EP - 253
PB - Springer
CY - Cham
ER -
TY - CHAP
A1 - Knackstedt, Ralf
A1 - Eggert, Mathias
A1 - Heddier, Marcel
A1 - Chasin, Friedrich
A1 - Becker, Jörg
T1 - The Relationship Of Is And Law - The Perspective Of And Implications For IS Research
T2 - ECIS 2013 Completed Research. 18
Y1 - 2013
N1 - Proceedings of the 21st European Conference on Information Systems
ER -
TY - CHAP
A1 - Knackstedt, Ralf
A1 - Eggert, Mathias
A1 - Heddier, Marcel
A1 - Chasin, Friedrich
A1 - Becker, Jörg
T1 - The Relationship of IS and Law - Insights into the German Online Car Registration Case
T2 - ECIS 2013 Completed Research. 18. Proceedings of the 21st European Conference on Information Systems
Y1 - 2013
ER -
TY - CHAP
A1 - Knackstedt, Ralf
A1 - Eggert, Mathias
A1 - Fleischer, Stefan
T1 - The Legal Perspective on Business to Government Reporting - A Conceptual Modeling Approach and Its Application in the Financial Sector
T2 - 45th Hawaii International Conference on System Sciences 2012
Y1 - 2012
SN - 978-0-7695-4525-7
U6 - http://dx.doi.org/10.1109/HICSS.2012.576
SP - 2309
EP - 2318
ER -
TY - JOUR
A1 - Klettke, Tanja
A1 - Homburg, Carsten
A1 - Gell, Sebastian
T1 - How to measure analyst forecast effort
JF - European Accounting Review
N2 - We introduce a new way to measure the forecast effort that analysts devote to their earnings forecasts by measuring the analyst's general effort for all covered firms. While the commonly applied effort measure is based on analyst behaviour for one firm, our measure considers analyst behaviour for all covered firms. Our general effort measure captures additional information about analyst effort and thus can identify accurate forecasts. We emphasise the importance of investigating analyst behaviour in a larger context and argue that analysts who generally devote substantial forecast effort are also likely to devote substantial effort to a specific firm, even if this effort might not be captured by a firm-specific measure. Empirical results reveal that analysts who devote higher general forecast effort issue more accurate forecasts. Additional investigations show that analysts' career prospects improve with higher general forecast effort. Our measure improves on existing methods as it has higher explanatory power regarding differences in forecast accuracy than the commonly applied effort measure. Additionally, it can address research questions that cannot be examined with a firm-specific measure. It provides a simple but comprehensive way to identify accurate analysts.
Y1 - 2015
U6 - http://dx.doi.org/10.1080/09638180.2014.909291
SN - 0963-8180
VL - 24
IS - 1
SP - 129
EP - 146
PB - Taylor & Francis
CY - London
ER -
TY - CHAP
A1 - Klein, Stefan
A1 - Lindemann, Markus
ED - Vogel, Douglas R.
T1 - New architectures for web-enabled EDI-applications and their impact on VANS
T2 - Global business in practice : proceedings of the Tenth International Bled Electronic Commerce Conference BLED '97, Bled, Slovenia, June 9-11 1997
Y1 - 1997
SP - 556
EP - 573
PB - Moderna organizacija
CY - Kranj
ER -
TY - JOUR
A1 - Kempt, Hendrik
A1 - Freyer, Nils
A1 - Nagel, Saskia K.
T1 - Justice and the normative standards of explainability in healthcare
JF - Philosophy & Technology
N2 - Providing healthcare services frequently involves cognitively demanding tasks, including diagnoses and analyses as well as complex decisions about treatments and therapy. From a global perspective, ethically significant inequalities exist between regions where the expert knowledge required for these tasks is scarce or abundant. One possible strategy to diminish such inequalities and increase healthcare opportunities in expert-scarce settings is to provide healthcare solutions involving digital technologies that do not necessarily require the presence of a human expert, e.g., in the form of artificial intelligent decision-support systems (AI-DSS). Such algorithmic decision-making, however, is mostly developed in resource- and expert-abundant settings to support healthcare experts in their work. As a practical consequence, the normative standards and requirements for such algorithmic decision-making in healthcare require the technology to be at least as explainable as the decisions made by the experts themselves. The goal of providing healthcare in settings where resources and expertise are scarce might come with a normative pull to lower the normative standards of using digital technologies in order to provide at least some healthcare in the first place. We scrutinize this tendency to lower standards in particular settings from a normative perspective, distinguish between different types of absolute and relative, local and global standards of explainability, and conclude by defending an ambitious and practicable standard of local relative explainability.
KW - Clinical decision support systems
KW - Justice
KW - Medical AI
KW - Explainability
KW - Normative standards
Y1 - 2022
U6 - http://dx.doi.org/10.1007/s13347-022-00598-0
VL - 35
IS - Article number: 100
SP - 1
EP - 19
PB - Springer Nature
CY - Berlin
ER -
TY - CHAP
A1 - Jarke, Matthias
A1 - Gebhardt, Michael
A1 - Jacobs, Stephan
A1 - Nissen, Hans W.
T1 - Conflict analysis across heterogeneous viewpoints: formalization and visualization
T2 - Proceedings of the 29th Annual Hawaii International Conference on System Sciences
Y1 - 1996
SN - 0-8186-7324-9
U6 - http://dx.doi.org/10.1109/HICSS.1996.493191
SP - 199
EP - 208
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Peters, Bettina
T1 - Innovation and Innovation Success in the German Manufacturing Sector. Econometric Evidence at Firm Level / Janz, N. and Peters, B.
Y1 - 2002
ER -
TY - JOUR
A1 - Janz, Norbert
A1 - Lööf, Hans
A1 - Peters, Bettina
T1 - Firm Level Innovation and Productivity, Is there a Common Story Across Countries?
JF - Problems and Perspectives in Management (2004)
Y1 - 2004
SN - ISSN 1727-7051
N1 - online download: http://businessperspectives.org/files/ppm/PPM_EN_2004_02_Janz.pdf
SP - 184
EP - 204
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Lööf, Hans
A1 - Peters, Bettina
T1 - Firm Level Innovation and Productivity, Is there a Common Story Across Countries?
Y1 - 2003
SN - ISSN 1727-7051
N1 - ZEW Diskussion Paper. No 03-26 Online : ftp://ftp.zew.de/pub/zew-docs/dp/dp0326.pdf
PB - Zentrum für Europäische Wirtschaftsforschung ZEW
CY - Mannheim
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Licht, Georg
A1 - Ebling, Günther
A1 - Niggemann, Hiltrud
T1 - Innovation in the Service Sector. Selected Facts and Some Policy Conclusions / Licht, G., G. Ebling, N. Janz, H. Niggemann
Y1 - 1999
PB - European Commission
CY - Luxembourg
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Licht, Georg
T1 - Innovation Activities and European Patenting of German Firms. A Panel Data Analysis / Janz, N., G. Licht
Y1 - 2002
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Gottschalk, Sandra
A1 - Hempell, Thomas
A1 - Peters, Bettina
T1 - Innovation Activities in the German Economy. Report on Indicators from the Innovation Survey 2000 (English translation) / Janz, N., S. Gottschalk, T. Hempell, B. Peters, G. Ebling und H. Niggemann
Y1 - 2002
PB - ZEW Zentrum für Europäische Wirtschaftsforschung
CY - Mannheim
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Gottschalk, Sandra
T1 - Innovation Dynamics and Endogenours Market Structue. An Econometric Investigation with Aggregated Innovation Survey Data / Gottschalk, S. und N. Janz
Y1 - 2001
N1 - ZEW-Discussion Paper 01-39 online unter ftp://ftp.zew.de/pub/zew-docs/dp/dp0139.pdf
PB - ZEW Zentrum für Europäische Wirtschaftsförderung
CY - Mannheim
ER -
TY - JOUR
A1 - Janz, Norbert
A1 - Goedhuys, Micheline
A1 - Mohnen, Pierre
T1 - What drives productivity in Tanzanian manufacturing firms: technology or business environment? / Goedhuys, Micheline ; Janz, Norbert ; Mohnen, Pierre
JF - The European Journal of Development Research. 20 (2008), H. 2
Y1 - 2008
SN - 1743-9728
SP - 199
EP - 218
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Goedhuys, Micheline
A1 - Mohnen, Pierre
T1 - Knowledge-based productivity in "low-tech" industries : evidence from firms in developing countries / Goedhuys, Micheline ; Janz, Norbert ; Mohnen, Pierre
Y1 - 2008
N1 - Working paper series // United Nations University, UNU-MERIT ; 2008,007
PB - UNU-MERIT
CY - Maastricht
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Goedhuys, Micheline
A1 - Mohnen, Pierre
T1 - What drives productivity in Tanzanian manufacturing firms: technology or institutions? / Goedhuys, Micheline ; Janz, Norbert ; Mohnen, Pierre
Y1 - 2006
N1 - Working paper series // United Nations University, UNU-MERIT ; 2006,037
PB - UnU-MERIT
CY - Maastricht
ER -
TY - JOUR
A1 - Janz, Norbert
A1 - Goedhuys, Micheline
A1 - Mairesse, Jacques
A1 - Mohnen, Pierre
T1 - Micro-evidence on innovation and development (MEIDE): an introduction / Goedhuys, Micheline ; Janz, Norbert ; Mairesse, Jacques ; Mohnen, Pierre
JF - The European Journal of Development Research. 20 (2008), H. 2
Y1 - 2008
SN - 1743-9728
SP - 167
EP - 171
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Ebling, Günther
A1 - Niggemann, Hiltrud
A1 - Stahl, Harald
T1 - 2nd Community Innovation Survey. 1st Interim Report. Report prepared for Eurostat / Ebling, G., N. Janz, H. Niggemann und H. Stahl
Y1 - 1998
PB - ZEW Zentrum für Europäische Wirtschaftsförderung
CY - Mannheim
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Ebling, Günther
A1 - Göggerle, J.
A1 - Licht, Georg
T1 - The Longitudinal Aspect of Innovation Surveys / G. Ebling, J. Göggerle, N. Janz, G. Licht und H. Stahl
Y1 - 1998
PB - ZEW Zentrum für Europäische Wirtschaftsförderung
CY - Mannheim
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Ebling, Günther
A1 - Gottschalk, Sandra
A1 - Peters, Bettina
T1 - Innovation Activities in the German Economy: Report on indicators from the Innovation Survey 2001 (english translation) / Janz, N., G. Ebling, S. Gottschalk, B. Peters und T. Schmidt
Y1 - 2002
PB - ZEW Zentrum für Europäische Wirtschaftsforschung
CY - Mannheim
ER -
TY - JOUR
A1 - Janz, Norbert
A1 - Ebling, Günther
A1 - Gottschalk, Sandra
A1 - Niggemann, Hiltrud
T1 - The Mannheim Innovation Panels (MIP and MIP-S) of the Centre for European Economic Research (ZEW) / Janz, N., G. Ebling, S. Gottschalk und H. Niggemann
JF - Schmollers Jahrbuch : Zeitschrift für Wirtschafts- und Sozialwissenschaften ; journal of applied social science studies. 121 (2001)
Y1 - 2001
SN - 0342-1783
SP - 123
EP - 129
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Ebling, Günther
A1 - Gottschalk, Sandra
A1 - Niggemann, Hiltrud
T1 - Prospects of the German Economy: Innovation Activities in the Manufacturing Sector. Survey 1999 Report to the Federal Ministry of Education and Research (English translation) / Janz, N., G. Ebling, S. Gottschalk und H. Niggemann
Y1 - 2000
PB - ZEW Zentrum für Europäische Wirtschaftsforschung
CY - Mannheim
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Ebling, Günther
A1 - Gottschalk, Sandra
A1 - Niggemann, Hiltrud
T1 - Services in the Future: Innovation Activities in the Service Sector. Survey 1999 (English translation) / Janz, N., G. Ebling, S. Gottschalk und H. Niggemann
Y1 - 2000
PB - ZEW Zentrum für Europäische Wirtschaftsforschung
CY - Mannheim
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Ebling, Günther
A1 - Gottschalk, Sandra
A1 - Niggemann, Hiltrud
T1 - 2nd Community Innovation Survey. Final Report. Report prepared for Eurostat / Ebling, G. , S. Gottschalk, N. Janz und H. Niggemann
Y1 - 1999
PB - ZEW Zentrum für Europäische Wirtschaftsforschung
CY - Mannheim
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Ebling, Günther
A1 - Gottschalk, Sandra
A1 - Niggemann, Hiltrud
T1 - 2nd Community Innovation Survey. 2nd Interim Report. Report prepared for Eurostat / Ebling, G. , S. Gottschalk, N. Janz und H. Niggemann
Y1 - 1999
PB - ZEW Zentrum für Europäische Wirtschaftsforschung
CY - Mannheim
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Ebling, Günther
A1 - Gottschalk, Sandra
A1 - Licht, Georg
T1 - Prospects of the German Economy: Innovation Activities in the Manufacturing Sector. Survey 1998 (English translation) / Janz, N., G. Ebling, S. Gottschalk, G. Licht und H. Niggemann
Y1 - 1999
PB - ZEW Zentrum für Europäische Wirtschaftsforschung
CY - Mannheim
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Ebling, Günther
A1 - Gottschalk, Sandra
A1 - Licht, Georg
T1 - Services in the Future. Innovation Activities in the Service Sector. Survey 1998 (English translation) / Janz, N., G. Ebling, S. Gottschalk, G. Licht und H. Niggemann
Y1 - 1999
PB - ZEW Zentrum für Europäische Wirtschaftsforschung
CY - Mannheim
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Ebling, Günther
T1 - Export and Innovation Activities in the German Service Sector. Empirical Evidence at the Firm Level / Ebling, G.. und N. Janz
Y1 - 1999
N1 - ZEW-Discussion Paper 99-53 online unter ftp://ftp.zew.de/pub/zew-docs/dp/dp5399.pdf
PB - ZEW Zentrum für Europäische Wirtschaftsförderung
CY - Mannheim
ER -
TY - JOUR
A1 - Janz, Norbert
T1 - Outlier Robust Estimation of an Euler Equation Investment Model with German Firm Level Panel Data
JF - Contributions to modern econometrics : from data analysis to economic policy ; [dedicated to Gerd Hansen on the occasion of his 65th Birthday] / ed. by Ingo Klein and Stefan Mittnik
Y1 - 2002
SN - 1402073348
N1 - Dynamic modeling in econometrics in economics and finance ; 4
SP - 87
EP - 103
PB - Kluwer Academic Publ.
CY - Dordrecht [u.a.]
ER -
TY - BOOK
A1 - Janz, Norbert
T1 - Interpreting Estimation Result of Euler Equation Investment Models when Factor Markets are Imperfectly Competitive
Y1 - 1997
N1 - ZEW-Discussion Paper 97-29 online unter ftp://ftp.zew.de/pub/zew-docs/dp/dp2997.pdf
PB - ZEW Zentrum für Europäische Wirtschaftsforschung
CY - Mannheim
ER -
TY - JOUR
A1 - Janz, Norbert
T1 - Innovative Power of German Manufacturing Industry Slows Down
JF - ZEW news. English edition. 4 (2002), H. 2002
Y1 - 2002
SP - 5
EP - 5
ER -
TY - JOUR
A1 - Janz, Norbert
T1 - Innovations in Germany: Market Novelties Gain Greater Importance
JF - ZEW news. English edition (2001)
Y1 - 2001
SP - 3
EP - 3
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Quernheim, Ulrich
A1 - Aghadavoodi Jolfaei, Masoud
T1 - Performance Evalutation of three Access Protocols for VSAT Networks / Ulrich Quernheim, Stephan Jacobs, Masoud Aghadavoodi Jolfaei
JF - Proceedings of the second European Conference on Satellite Communications : ECSC-2 ; Palais de Congrès, Liège, Belgium, 22 - 24 October 1991 / [ed.: Brigitte Kaldeich]
Y1 - 1991
SN - 92-9092-170-6
N1 - European Conference on Satellite Communications <2, 1991, Liège>; ESA SP ; 332
PB - ESA Publ. Div.
CY - Noordwijk
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Quernheim, Ulrich
T1 - ARQ Error Control for Multipoint Satellite Communications / Ulrich Quernheim, Stephan Jacobs
JF - Computer networking : proceedings of the IFIP TC 6 Conference on Computer Networking, COMNET '90, Budapest, Hungary, 8-10 May, 1990 / edited by László Csaba, Tibor Szentiványi, Katie Tarnay
Y1 - 1990
SN - 0444888721
N1 - International Federation for Information Processing ; COMNET ; (1990, Budapest)
PB - Elsevier
CY - New York, N.Y.
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Quernheim, Ulrich
T1 - Multicopy ARQ Error Control Techniques for Multipoint Satellite Links / Ulrich Quernheim, Stephan Jacobs
JF - Proceedings of the IFIP TC 6 International Conference on Information Network and Data Communication : Lillehammer, Norway, 26 - 29 March, 1990 / ed. by Dipak Khakhar ...
Y1 - 1990
SN - 0-444-88696-6
N1 - International Conference on Information Network and Data Communication <3, 1990, Lillehammer>
PB - North-Holland
CY - Amsterdam [u.a.]
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Quernheim, Ulrich
T1 - Error Control Techniques for Digital Satellite Links
JF - C-band antennas for regional communication systems : 1st European Conference Satellite Communications, ECSC-1, München, 28.-30.11.89 / Wolf, H. u.a. [Mitarb.]. Information und Dokumentation, Messerschmitt-Bölkow-Blohm GmbH (MBB), München
Y1 - 1990
PB - OTN-Berichtsstelle, Technisch-wissenschaftliche Information, Messerschmitt-Bölkow-Blohm GmbH
CY - München
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Jarke, Matthias
A1 - Pohl, Klaus
A1 - Bubenko, Janis
T1 - Requirements Engineering : An Integrated View of Representations, Process, and Domain / Jarke, Matthias ; Pohl, Klaus ; Jacobs, Stephan ; Bubenko, Janis ...
JF - Software engineering : 4th European Software Engineering Conference Garmisch-Partenkirchen, Germany, September 13 - 17, 1993 ; proceedings / ESEC '93. Ian Sommerville ... (eds.)
Y1 - 1993
SN - 3-540-57209-0
N1 - ESEC (4, 1993, Garmisch-Partenkirchen); Lecture notes in computer science ; 717
SP - 100
EP - 114
PB - Springer
CY - Berlin [u.a.]
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Jarke, Matthias
A1 - Pohl, Klaus
T1 - Requirements Engineering 1993
JF - Automated software engineering : the international journal of automated reasoning and artificial intelligence in software engineering. Vol. 1 (1994), H. No. 1
Y1 - 1994
SN - 0928-8910
ER -
TY - BOOK
A1 - Jacobs, Stephan
A1 - Jarke, Matthias
T1 - Requirements information management : the NATURE approach / RWTH Aachen, Fachgruppe Informatik. M. Jarke
Y1 - 1994
N1 - Aachener Informatik-Berichte ; 94-24
PB - RWTH, Fachgruppe Informatik
CY - Aachen
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Holten, Roland
T1 - Goal Driven Business Modelling - Supporting Decision Making within Information System Development
JF - Conference on Organizational Computing Systems : August 13 - 16, 1995, Milpitas, Calif. / general ed. Nora Comstock ...
Y1 - 1995
SN - 0-89791-706-5
N1 - Conference on Organizational Computing Systems <1995, Milpitas, Calif.>
PB - ACM
CY - New York, NY
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Hermanns, Oliver
T1 - Cooperative Design: Requirements on Network Technology and Document Architecture
JF - Selected papers of the 6th Joint European Networking Conference / guest ed.: J. Barberá
Y1 - 1996
N1 - Joint European Networking Conference <6, 1995, Tel Aviv>; Computer networks and ISDN systems ; 28,4 : special issue
PB - Elsevier
CY - Amsterdam [u.a.]
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Grob, Robert
A1 - Kethers, Stefanie
T1 - Towards CIS in Quality Management - Integration of Agents and Methods / Robert Grob, Stephan Jacobs, Stefanie Kethers
JF - Proceedings of the Second International Conference on Cooperative Information Systems : May 17 - 20, 1994, Toronto, Canada / sponsored by the University of Toronto. Editors: Michael Brodie
Y1 - 1994
N1 - International Conference on Cooperative Information Systems ; (2 : ; 1994.05.17-20 : ; Toronto)
PB - University of Toronto Press
CY - Toronto
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Gebhardt, Michael
A1 - Kethers, Stefanie
A1 - Rzasa, Wojtek
T1 - Filling HTML forms simultaneously: CoWeb — architecture and functionality
JF - Computer Networks and ISDN Systems. Vol. 30 (1996), H. Issues 1-7
Y1 - 1996
SN - 0376-5075
SP - 1385
EP - 1395
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Gebhardt, Michael
T1 - Conflict Management in Design /
JF - Transactions from the Eighth Symposium on Quality Function Deployment : (concurrent with International Symposium on QFD 96] ; June 9 - 11, 1996, Novi, Michigan, USA / sponsored by: QFD Institute
Y1 - 1996
N1 - Symposium on Quality Function Deployment ; (8, 1996, Novi, Mich.)
PB - QFD Institute
CY - Ann Arbor, Mich.
ER -
TY - JOUR
A1 - Jacobs, Stephan
T1 - CSCW for Requirements Engineering - Requirements Engineering for CSCW
JF - Proceedings of the Third European Conference on Computer Supported Cooperative Work : 13 - 17 September 1993, Milan, Italy ; ECSCW ' 93 / ed. by Giorgio de Michelis ...
Y1 - 1993
SN - 0-7923-2447-1
N1 - ECSCW <3, 1993, Milano> ; [Workshop "CSCW Tools and Technologies: Definging Research Agendas]
PB - Kluwer
CY - Dordrecht [u.a.]
ER -
TY - JOUR
A1 - Jacobs, Stephan
T1 - A Fault Diagnosis System Using Temporary Relations between Symptoms
JF - Operations research '93 : extended abstracts of the 18th Symposium on Operations Research held at the University of Cologne, September 1 - 3, 1993 / Achim Bachem ... (ed.)
Y1 - 1994
SN - 379080794X
N1 - Symposium on Operations Research ; (18, 1993, Köln)
PB - Physica-Verl.
CY - Heidelberg
ER -
TY - JOUR
A1 - Jacobs, Stephan
T1 - The Teamwork Approach in Requirements Engineering
JF - The nature of requirements engineering / Matthias Jarke ... (Hrsg.)
Y1 - 1999
SN - 3-8265-6174-0
PB - Shaker
CY - Aachen
ER -
TY - JOUR
A1 - Jacobs, Stephan
T1 - Introducing Measurable Requirements: A Case Study
JF - Proceedings : June 7 - 11, 1999, University of Limerick, Limerick, Ireland / sponsored by IEEE Computer Society Technical Council on Software Engineering. In cooperation with ACM SIGSOFT
Y1 - 1999
SN - 0769501885
N1 - International Symposium on Requirements Engineering ; (4, 1999, Limerick)
ER -
TY - CHAP
A1 - Jacobs, Stephan
ED - Bleek, Wolf-Gideon
T1 - Towards integration driven design : experience report
T2 - Software Engineering 2007 : Beiträge zu den Workshops ; Fachtagung des GI-Fachbereichs Softwaretechnik ; 27. - 30.03.2007 in Hamburg. - (GI-Edition : Proceedings ; 106)
Y1 - 2007
SN - 978-3-88579-200-0
SP - 143
EP - 150
PB - Ges. für Informatik
CY - Bonn
ER -
TY - JOUR
A1 - Hoepner, Gert
T1 - Info-Web-Generation
JF - Dm-compact : academic news for marketeers / Deutscher Direktmarketing Verband e. V.. 2 (2004), H. 3-4
Y1 - 2004
SN - 1573-3181
N1 - engl. Text unter gleichem Titel im gleichen Heft: Seite 12-17
SP - 14
EP - 20
ER -
TY - CHAP
A1 - Herzwurm, Georg
A1 - Pietsch, Wolfram
T1 - Introduction of RePriCo’13
T2 - 19th International Working Conference on Requirements Engineering: Foundation for Software Quality (REFSQ 2013) : proceedings of the REFSQ 2013 Workshops CreaRE, IWSPM, and RePriCo, the REFSQ 2013 Empirical Track (Empirical Live Experiment and Empirical Research Fair), the REFSQ 2013 Doctoral Symposium, and the REFSQ 2013 Poster Session. ICB-research report. No. 56
Y1 - 2013
SN - ISSN 1860-2770 (Print ) ; ISSN 1866-5101 (Online)
SP - 103
EP - 105
PB - Duisburg-Essen
CY - Univ.
ER -
TY - CHAP
A1 - Herzwurm, Georg
A1 - Pietsch, Wolfram
T1 - Guidelines for the analysis of IT business models and strategic positioning of IT-products
T2 - Second International Workshop on Software Product Management : IWSPM '08 : Barcelona, Catalunya, 09.09.2008
Y1 - 2008
SN - 978-1-4244-4083-2 (Print) ; 978-0-7695-3625-5 (E-Book)
U6 - http://dx.doi.org/10.1109/IWSPM.2008.3
SP - 1
EP - 8
PB - IEEE
CY - Piscataway, NJ
ER -
TY - JOUR
A1 - Herzwurm, Georg
A1 - Krams, Benedikt
A1 - Pietsch, Wolfram
A1 - Schockert, Sixten
T1 - Report from the 3rd international workshop on requirements prioritization for customer oriented software development (RePriCo’12)
JF - ACM SIGSOFT Software Engineering Notes
N2 - Prioritization is an essential task within requirements engineering to cope with complexity and to establish focus properly. The 3rd Workshop on Requirements Prioritization for customer oriented Software Development (RePriCo’12) focused on requirements prioritization and adjacent themes in the context of customer oriented development of bespoke and standard software. Five submissions have been accepted for the proceedings and for presentation. The report summarizes and points out key findings.
KW - Requirements relations
KW - Discourse ethics
KW - Tool support
KW - Consensus
KW - Requirements prioritization
Y1 - 2012
U6 - http://dx.doi.org/10.1145/2237796.2237817
SN - 0163-5948
VL - 37
IS - 4
SP - 32
EP - 34
PB - Association for Computing Machinery
CY - New York
ER -
TY - CHAP
A1 - Hammer, Andreas
A1 - Vieth, Matthias
A1 - Maier, Frank
T1 - Co-Plot as a new multivariate analysis method for operations management research?
T2 - Papers of the 12th International EurOMA Conference on Operational and Global Competitiveness, Budapest, Hungary, June 19-22, 2005 / Editor: Krisztina Demeter
Y1 - 2005
SN - 963-218-455-6
SP - 1007
EP - 1016
ER -
TY - BOOK
A1 - Hack, Stefan
A1 - Lindemann, Markus
T1 - Enterprise SOA Roadmap
Y1 - 2008
SN - 1-59229-162-7
PB - Galileo Pr.
CY - Bonn
ER -
TY - JOUR
A1 - Görgens, Stefan
A1 - Greubel, Steffen
A1 - Moosdorf, Andreas
T1 - How to mobilize 20,000 people: Perspectives on retail and consumer goods
Y1 - 2013
SP - 52
EP - 58
ER -
TY - JOUR
A1 - Grap, Rolf Dietmar
T1 - Determining manpower requirements in a spinning mill
JF - Chemical fibers international : CFI ; fiber polymers, fibers, texturing, and spunbonds (2003)
Y1 - 2003
SN - 0340-3343
SP - 455
EP - 458
ER -
TY - JOUR
A1 - Grap, Rolf Dietmar
T1 - If you think, education is expensive, try incompetence
JF - Beschaffung aktuell (2007)
Y1 - 2007
SN - 0341-4507
N1 - freier Zugang nach Registrierung
SP - 62
EP - 63
ER -
TY - BOOK
A1 - Gottschalk, Sandra
A1 - Janz, Norbert
A1 - Rennings, Klaus
T1 - Characteristics and Performance of Eco-Innovative Firms in the German Service Sector
Y1 - 1998
ER -
TY - CHAP
A1 - Golland, Alexander
A1 - Ohrtmann, Jan-Peter
T1 - Video surveillance: The supervisory authorities’ view andrecent case law
T2 - Turning Point in Data Protection Law
Y1 - 2020
SN - 978-3-8487-6909-4
U6 - http://dx.doi.org/10.5771/9783748921561-175
SP - 175
EP - 178
PB - Nomos
CY - Baden-Baden
ER -
TY - CHAP
A1 - Golland, Alexander
T1 - Struggling with users’ consent: Economic approach to solve the issue of coupling
T2 - Turning Point in Data Protection Law
Y1 - 2020
SN - 978-3-8487-6909-4
U6 - http://dx.doi.org/10.5771/9783748921561-121
SP - 121
EP - 126
PB - Nomos
CY - Baden-Baden
ER -
TY - JOUR
A1 - Goedhuys, Micheline
A1 - Janz, Norbert
A1 - Mohnen, Pierre
T1 - Knowledge-based productivity in “low-tech” industries: evidence from firms in developing countries
JF - Industrial and corporate change
N2 - Using firm-level data from five developing countries—Brazil, Ecuador, South Africa, Tanzania, and Bangladesh—and three industries—food processing, textiles, and the garments and leather products—this article examines the importance of various sources of knowledge for explaining productivity and formally tests whether sector- or country-specific characteristics dominate these relationships. Knowledge sources driving productivity appear mainly sector specific. Also differences in the level of development affect the effectiveness of knowledge sources. In the food processing sector, firms with higher educated managers are more productive, and in least-developed countries, additionally those with technology licenses and imported machinery and equipment. In the capital-intensive textiles sector, productivity is higher in firms that conduct R&D. In the garments and leather products sector, higher education of the managers, licensing, and R&D raise productivity.
Y1 - 2014
U6 - http://dx.doi.org/10.1093/icc/dtt006
SN - 1464-3650 (E-Journal); 0960-6491 (Print)
VL - 23
IS - 1
SP - 1
EP - 23
PB - Oxford University Press
CY - Oxford
ER -
TY - BOOK
A1 - Gell, Sebastian
T1 - Determinants of earnings forecast error, earnings forecast revision and earnings forecast accuracy
N2 - Earnings forecasts are ubiquitous in today’s financial markets. They are essential indicators of future firm performance and a starting point for firm valuation. Extremely inaccurate and overoptimistic forecasts during the most recent financial crisis have raised serious doubts regarding the reliability of such forecasts. This thesis therefore investigates new determinants of forecast errors and accuracy. In addition, new determinants of forecast revisions are examined. More specifically, the thesis answers the following questions: 1) How do analyst incentives lead to forecast errors? 2) How do changes in analyst incentives lead to forecast revisions?, and 3) What factors drive differences in forecast accuracy?
Y1 - 2012
SN - 978-3-8349-3936-4
SN - 978-3-8349-3937-1
U6 - http://dx.doi.org/10.1007/978-3-8349-3937-1
N1 - Titel in der Buchreihe: Quantitatives Controlling
PB - Springer Gabler
CY - Wiesbaden
ER -
TY - JOUR
A1 - Gebhardt, Michael
A1 - Jarke, Matthias
A1 - Jacobs, Stephan
T1 - A Toolkit for Negotiation Support Interfaces to Multidimensional Data
JF - SIGMOD 1997 : proceedings ACM SIGMOD International Conference on Management of Data, May 13 - 15, 1997, Tucson, Arizona, USA / ed. by Joan M. Peckman
Y1 - 1997
SN - 0897919114
N1 - International Conference on Management of Data ; (1997, Tucson, Ariz.)
PB - ACM Press
CY - New York, NY
ER -
TY - CHAP
A1 - Freyer, Nils
A1 - Thewes, Dustin
A1 - Meinecke, Matthias
ED - Gusikhin, Oleg
ED - Hammoudi, Slimane
ED - Cuzzocrea, Alfredo
T1 - GUIDO: a hybrid approach to guideline discovery & ordering from natural language texts
T2 - Proceedings of the 12th International Conference on Data Science, Technology and Applications DATA - Volume 1
N2 - Extracting workflow nets from textual descriptions can be used to simplify guidelines or formalize textual descriptions of formal processes like business processes and algorithms. The task of manually extracting processes, however, requires domain expertise and effort. While automatic process model extraction is desirable, annotating texts with formalized process models is expensive. Therefore, there are only a few machine-learning-based extraction approaches. Rule-based approaches, in turn, require domain specificity to work well and can rarely distinguish relevant and irrelevant information in textual descriptions. In this paper, we present GUIDO, a hybrid approach to the process model extraction task that first, classifies sentences regarding their relevance to the process model, using a BERT-based sentence classifier, and second, extracts a process model from the sentences classified as relevant, using dependency parsing. The presented approach achieves significantly better resul ts than a pure rule-based approach. GUIDO achieves an average behavioral similarity score of 0.93. Still, in comparison to purely machine-learning-based approaches, the annotation costs stay low.
KW - Natural Language Processing
KW - Text Mining
KW - Process Model Extraction
KW - Business Process Intelligence
Y1 - 2023
SN - 978-989-758-664-4
U6 - http://dx.doi.org/10.5220/0012084400003541
SN - 2184-285X
N1 - Proceedings of the 12th International Conference on Data Science, Technology and Applications, July 11-13, 2023, in Rome, Italy.
SP - 335
EP - 342
ER -
TY - CHAP
A1 - Freyer, Nils
A1 - Kempt, Hendrik
ED - Bhakuni, Himani
ED - Miotto, Lucas
T1 - AI-DSS in healthcare and their power over health-insecure collectives
T2 - Justice in global health
N2 - AI-based systems are nearing ubiquity not only in everyday low-stakes activities but also in medical procedures. To protect patients and physicians alike, explainability requirements have been proposed for the operation of AI-based decision support systems (AI-DSS), which adds hurdles to the productive use of AI in clinical contexts. This raises two questions: Who decides these requirements? And how should access to AI-DSS be provided to communities that reject these standards (particularly when such communities are expert-scarce)? This chapter investigates a dilemma that emerges from the implementation of global AI governance. While rejecting global AI governance limits the ability to help communities in need, global AI governance risks undermining and subjecting health-insecure communities to the force of the neo-colonial world order. For this, this chapter first surveys the current landscape of AI governance and introduces the approach of relational egalitarianism as key to (global health) justice. To discuss the two horns of the referred dilemma, the core power imbalances faced by health-insecure collectives (HICs) are examined. The chapter argues that only strong demands of a dual strategy towards health-secure collectives can both remedy the immediate needs of HICs and enable them to become healthcare independent.
Y1 - 2023
SN - 9781003399933
U6 - http://dx.doi.org/10.4324/9781003399933-4
SP - 38
EP - 55
PB - Routledge
CY - London
ER -
TY - JOUR
A1 - Fredebeul-Krein, Markus
A1 - Vogel, Erika
T1 - Underground Storage Facilities in the German natural gas market: A need for access regulation to ensure competition?
JF - Zeitschrift für Energiewirtschaft. 30 (2006), H. 4
Y1 - 2006
SN - 0343-5377
SP - 257
EP - 270
ER -
TY - JOUR
A1 - Fredebeul-Krein, Markus
A1 - Steingröver, Markus
T1 - Next Generation Access Networks: Why is there a higher risk of investment and how to deal with it?
JF - Wettbewerbsprobleme im Internet / Jörn Kruse ... (Hrsg.). Mit Beitr. von: Patrick F. E. Beschorner ...
Y1 - 2009
SN - 978-3-8329-5024-8
N1 - Hamburger Forum Medienökonomie ; 9
SP - 83
EP - 102
PB - Nomos, Ed. Fischer
CY - Baden-Baden
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
A1 - Steingröver, Markus
T1 - Wholesale Broadband Access to IPTV in an NGA environment : how to deal with it from a regulatory perspective?
Y1 - 2012
N1 - Regional ITS Conference of the international Telecommunications Society , February 22-24, 2012 New Delhi, India
SP - 1
EP - 16
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
A1 - Steingröver, Markus
T1 - Enhancing broadband development and internet usages for improving networks and services in APEC member economies: Bridging the digital divide
T2 - The 19th ITS Biennial Conference 2012 “Moving Forward with Future Technologies: Opening a Platform for All” 18 - 21 November 2012, Thailand
Y1 - 2013
PB - ITS
CY - Bangkok
ER -
TY - JOUR
A1 - Fredebeul-Krein, Markus
A1 - Steingröver, Markus
T1 - Wholesale broadband access to IPTV in an NGA environment : how to deal with it from a regulatory perspective?
JF - Telecommunications Policy
Y1 - 2014
U6 - http://dx.doi.org/doi:10.1016/j.telpol.2013.04.002
SN - 0308-5961 (Print)
SN - 1879-3258 (Online)
VL - 38
IS - 3
SP - 264
EP - 277
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Fredebeul-Krein, Markus
A1 - Knoben, Werner
T1 - Long term risk sharing contracts as an approach to establish public–private partnerships for investment into next generation access networks
JF - Telecommunications Policy
Y1 - 2010
SN - 0308-5961
VL - 34
IS - 9
SP - 528
EP - 539
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
A1 - Haunert, Martina
T1 - Assessing the effectiveness of price cap regimes for the regulation of fixed telephony markets: has it been successful in achieving competition? : preliminary draft / by Markus Fredebeul-Krein and Martina Haunert. 19th European Regional ITS Conference of the International Telecommunications Society, September 17–19, 2008 Rome, Italy
N2 - 1. Introduction 2. Tariff regulation, rebalancing and price caps 3. Price cap regimes in selected European countries 4. Has price cap regulation been successful? 5. Regulatory implications for other countries
KW - Telekommunikationsmarkt
KW - Telekommunikationsmarkt
Y1 - 2008
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
T1 - Time for revision: The regulation of Germany's next generation networks in the light of new economic and technological challenges on telecom markets : Presentation for the 18th Biennial conference of the International Telecommunications Society, June 24–27, 2008 Montreal, Canada
N2 - On 1st January 1998, the German telecom market was fully liberalised. Since then genuine competition between market participants has developed, based on a comprehensive legal and regulatory framework that provides for safeguards against unfair competition and market power by Deutsche Telekom. Today, about 10 years after the liberalisation of the telecommunications sector a revision of this regulatory approach has become necessary because at least on three dimensions the situation is quite different from the one 10 years ago: First, with numerous established alternative operators in the market monopolies have been successfully challenged and competition introduced. Second, not only is Cable TV becoming in large parts of Germany a viable alternative for the provision of broadband services but also mobile services are becoming increasingly a substitute for fixed services. Last but not least there are important technological changes under way, requiring huge investments in infrastructure upgrades for next generation networks. In the light of these new developments the question is to which extent the current regulatory approach of severe ex-ante regulatory intervention is still appropriate. Is any part of the network of the former incumbent still a bottleneck? A more light handed regulatory approach might be the right response to this new situation. The paper is organised as follows: The first section will briefly examine the economic rationale for regulating network access. Based on the assumption that regulation is always necessary when bottlenecks exist regulatory principles for an efficient network access regime will be derived. The second section compares the situation of the German market in early 1998 with the one of today. Thereby three dimensions will be considered: the degree of competition, the potential for substitution and technological developments. The third section will define some requirements for the future regulation of telecom markets. Proposals will be elaborated how to ensure competitive telecom markets in the light of new economic and technological challenges.
KW - Telekommunikationsmarkt
KW - Telekommunikationsmarkt
Y1 - 2008
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
T1 - Encouraging competition and investment into next generation access networks: The case of long term risk sharing contracts
N2 - Working paper distributed at 2nd Annual Next Generation Telecommunications Conference 2009, 13th – 14th October 2009, Brussels 14 pages Abstract Governments all over Europe are in the process of adopting new broadband strategies. The objective is to create modern telecommunications networks based on powerful broadband infrastructures". In doing so, they aim for innovative and investment-friendly concepts. For instance, in a recently published consultation paper on the subject the German regulator BNetzA declared that it will take “greater account of … reducing risks, securing the investment and innovation power, providing planning certainty and transparency – in order to support and advance broadband rollout in Germany”. It further states that when regulating wholesale rates it has to be ensured that “… adequate incentives for network rollout are provided on the one hand, while sustainable and fair competition is ensured on the other”. Also an EC draft recommendation on regulated network access is about to set new standards for the regulation of next generation access networks. According to the recommendation the prices of new assets shall be based on costs plus a projectspecific risk premium to be included in the costs of capital for the investment risk incurred by the operator. This approach has been criticised from various sides. In particular it has been questioned whether such an approach is adequate to meet the objectives of encouraging both competition and investment into next generation access networks. Against this background, the concept of “long term risk sharing contracts” has been proposed recently as an approach which does not only incorporate the various additional risks involved in the deployment of NGA infrastructure, but has several other advantages. This paper will demonstrate that the concept allows for competition to evolve at both the retail and wholesale level on fair, objective, non-discriminatory and transparent terms and conditions. Moreover, it ensures the highest possible investment incentive in line with socially desirable outcome. The paper is organised as follows: The next section will briefly outline the importance of encouraging competition and investment in an NGA-environment. The third section will specify the design of long term risk sharing contracts in view of achieving these objectives. The fourth section will examine potential problems associated with the concept. In doing so a way of how to deal with them will be elaborated. The last section will look at arguments against long term risk sharing contracts. It will be shown that these arguments are not strong enough to build a case against introducing such contracts.
KW - Electronic Commerce
KW - Breitband Markt
KW - Regulierung
KW - Internet
KW - Bundesnetzagentur
KW - broadband market
KW - regulation
KW - Internet
KW - next generation access networks
KW - risk sharing
Y1 - 2009
ER -
TY - JOUR
A1 - Fredebeul-Krein, Markus
T1 - The case for a more binding WTO agreement on regulatory principles in telecommunication markets
JF - Telecommunications policy. vol. 23 (1999), H. afl. 9
Y1 - 1999
SN - 0308-5961
SP - 625
EP - 644
ER -
TY - JOUR
A1 - Fredebeul-Krein, Markus
T1 - Telecommunications and WTO discipline : an assessment of the WTO agreement on telecommunication services
JF - Telecommunications policy. 21 (1997), H. 6
Y1 - 1997
SN - 0308-5961
SP - 477
EP - 491
ER -
TY - JOUR
A1 - Fredebeul-Krein, Markus
T1 - Adopting a coherent institutional framework for the Ukrainian telecom sector: Lessons to be learnt from European and German experience
JF - Zerkalo Nedeli (2003)
Y1 - 2003
N1 - (Ukrainian Journal)
ER -
TY - JOUR
A1 - Fredebeul-Krein, Markus
T1 - Regulating Prices of Unbundled Access to the Local Loop: A German Case Study
JF - Telekomunikacja i techniki informacyjne (2002)
Y1 - 2002
SN - 1640-1549
N1 - Telecommunications and Information Technologies
SP - 10
EP - 18
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
T1 - Developing competitive broadband markets: Lessons learnt from German and European regulatory approaches on broad-band access
N2 - A key feature of future broadband markets will be diversity of access technologies, meaning that numerous technologies will be exploited for broadband communication. Various factors will affect the success of these future broadband markets, the regulatory policy being one amongst others. So far, a coherent regulatory approach does not exist as to broadband markets. First results of policies so far suggest that less sector-specific regulation is likely to occur. Instead, regulators must ensure that access to networks and services of potentially dominant providers in a relevant broadband market will satisfy requirements for openness and non-discrimination. In this environment the future challenge of regulationg broadband markets will be to set the right incentives for investment into new infrastructures. This paper examines whether there is a need for the regulation of future broadband access markets an if yes, what is the appropriate regulatory tool to do so. Thereby the focus is on the analysis of European broadband markets and the regulatory approaches applied. The first section provides a description of the characteristics of future broadband markets. The second section discusses possible bottlenecks on broadband markets an their regulatory implications. The third section will examine regulatory issues concerning access to broadband networks in more detail. This will be done by comparing the regulatory approaches of European countries and the results in terms of bradband penetration. The final section will give key recommendations for a regulatory strategy on brandband access markets.
KW - Telekommunikationsmarkt
KW - Telekommunikationsmarkt
Y1 - 2006
N1 - paper presented at 16th Biennial conference of the International Telecommunications Society. Information Communication Technology: Opportunities and Challenges for Telecommunications. June 12-16, 2006 Beijing, China.
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
T1 - 10 years of liberalised telecom markets in Germany: Assessing the degree of competition on the markets for voice telephony
N2 - Market data for the German telecom market shows that Deutsche Telekom as the former incumbent is constantly loosing shares on all arkets for voice telephony: the market for local calls, the market for long-distance calls and the market for international calls. At the same time prices decline steadily with the latest trend being that operators offer voice services free of charge, the costs of which are covered by a monthly subscription charge. Against this background the paper examines the state of policy and regulatory reform in the telecommunications sector in Germany almost 10 years after the liberalisation of the fixed telecommunications market. Thereby the focus is on the analysis of the competitive conditions that have been established on the German market for voice telephony services. If these retail markets are competitive, there might be a need to remove remaining regulatory provisions. In the new environment of converging markets the future challenge of regulating fixed telecom markets might be to ensure that access to the network and/or services of a potentially dominant provider in a relevant market will satisfy requirements for openness and non-discrimination.
KW - Telekommunikationsmarkt
KW - Telekommunikationsmarkt
Y1 - 2007
N1 - paper presented at 18th European Regional ITS Conference of the International Telecommunications Society, September 2-4, 2007 Istanbul, Turkey
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
T1 - Towards trade facilitation via regulatory convergence: An analysis of the TTIP chapter on Electronic Communications
T2 - Regional ITS Conference of the International Telecommunications Society. Cambridge, United Kingdom, 7-9 September 2016
N2 - To give the exchange of goods and services between the European Union (EU) and the United States (U.S.) new momentum the two parties are currently negotiating the transatlantic free trade agreement Transatlantic Trade and Investment Partnership (TTIP). The aim is to create the largest free trade area in the world. The agreement, once entered into force, will oblige EU countries and the U.S. to further liberalize their markets.
The negotiations on TTIP include a chapter on Electronic Communications/ Telecommunications. The challenge therein will be securing commitments for market access to Electronic Communications services. At the same time, these commitments must reflect the legitimate need for consumer protection issues. The need to reduce Electronic Communications-related non-tariff barriers to trade between the Parties is due to the fact that these markets are heavily regulated. Without transnational rules as to regulations national governments can abuse these regulations to deter the market entry by new (foreign) suppliers. Thus the free trade agreement TTIP affects in many respects regulatory provisions on and access to Electronic Communications markets. The objective of this paper is therefore to examine to what extend the regulatory principles for Electronic Communications markets envisaged under TTIP will result in trade facilitation and regulatory convergence between the EU and the U.S.
As to this question the result of the analysis is that the chapter on Electronic Communications will be an important step towards facilitating trade in Electronic Communications services. At the same time some regulatory convergence will take place, but this convergence will not lead to a (full) harmonization of regulations. Rather the norm, also after TTIP negotiations will have been concluded successfully, will be mutual recognition of different regulatory regimes. Different regulations being the optimal policy response in different market settings will continue to exist. Moreover, it is very unlikely that such regulatory principles for the Electronic Communications sector are a vehicle for a race to the bottom in levels of consumer protection.
KW - regulation
KW - liberalisation
KW - electronic communications markets
KW - TTIP
Y1 - 2016
ER -
TY - CHAP
A1 - Ernhardt, Selina
A1 - Drumm, Christian
A1 - van Gog, Tamara
A1 - Brand-Gruwel, Saskia
A1 - Jarodzka, Halszka
T1 - Through the eyes of a programmer : a research project on how to foster programming education with eye-tracking technology
T2 - Tagungsband zur 32. AKWI-Jahrestagung vom 15.09.2019 bis 18.09.2019 an der Fachhochschule für Angewandte Wissenschaften Aachen
Y1 - 2019
SN - 978-3-944330-62-4
SP - 42
EP - 47
PB - Mana-Buch
CY - Heide
ER -
TY - JOUR
A1 - Emhardt, Selina N.
A1 - Jarodzka, Halszka
A1 - Brand-Gruwel, Saskia
A1 - Drumm, Christian
A1 - Niehorster, Diederick C.
A1 - van Gog, Tamara
T1 - What is my teacher talking about? Effects of displaying the teacher’s gaze and mouse cursor cues in video lectures on students’ learning
JF - Journal of Cognitive Psychology
N2 - Eye movement modelling examples (EMME) are instructional videos that display a
teacher’s eye movements as “gaze cursor” (e.g. a moving dot) superimposed on the
learning task. This study investigated if previous findings on the beneficial effects of EMME would extend to online lecture videos and compared the effects of displaying the teacher’s gaze cursor with displaying the more traditional mouse cursor as a tool to guide learners’ attention. Novices (N = 124) studied a pre-recorded video lecture on how to model business processes in a 2 (mouse cursor absent/present) × 2 (gaze cursor absent/present) between-subjects design. Unexpectedly, we did not find significant effects of the presence of gaze or mouse cursors on mental effort and learning. However, participants who watched videos with the gaze cursor found it easier to follow the teacher. Overall, participants responded positively to the gaze cursor, especially when the mouse cursor was not displayed in the video.
KW - Instructional design
KW - eye movement modelling examples
KW - video learning
Y1 - 2022
U6 - http://dx.doi.org/10.1080/20445911.2022.2080831
SN - 2044-5911
SP - 1
EP - 19
PB - Routledge, Taylor & Francis Group
CY - Abingdon
ER -
TY - JOUR
A1 - Emhardt, Selina
A1 - Jarodzka, Halszka
A1 - Brand-Gruwel, Saskia
A1 - Drumm, Christian
A1 - Gog, Tamara van
T1 - Introducing eye movement modeling examples for programming education and the role of teacher's didactic guidance
JF - ETRA '20 Short Papers: ACM Symposium on Eye Tracking Research and Applications
N2 - In this article, we introduce how eye-tracking technology might become a promising tool to teach programming skills, such as debugging with ‘Eye Movement Modeling Examples’ (EMME). EMME are tutorial videos that visualize an expert's (e.g., a programming teacher's) eye movements during task performance to guide students’ attention, e.g., as a moving dot or circle. We first introduce the general idea behind the EMME method and present studies that showed first promising results regarding the benefits of EMME to support programming education. However, we argue that the instructional design of EMME varies notably across them, as evidence-based guidelines on how to create effective EMME are often lacking. As an example, we present our ongoing research on the effects of different ways to instruct the EMME model prior to video creation. Finally, we highlight open questions for future investigations that could help improving the design of EMME for (programming) education.
Y1 - 2020
U6 - http://dx.doi.org/10.1145/3379156.3391978
IS - Art. 52
SP - 1
EP - 4
PB - ACM
CY - New York
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 - http://dx.doi.org/10.1007/978-3-031-33338-5_11
SP - 243
EP - 263
PB - Springer
CY - Cham
ER -
TY - CHAP
A1 - Eggert, Mathias
A1 - Winkelmann, Axel
A1 - Lohmann, Patrick
A1 - Knackstedt, Ralf
T1 - The Regulatory Influence On Management Information Systems - A Contingency Perspective
T2 - ECIS 2013 Completed Research. 9
Y1 - 2013
N1 - Proceedings of the 21st European Conference on Information Systems
ER -
TY - CHAP
A1 - Eggert, Mathias
A1 - Weber, Jannik
T1 - What drives the purchase decision in Instagram stores?
T2 - ECIS 2023 Research Papers
N2 - The popularity of social media and particularly Instagram grows steadily. People use the different platforms to share pictures as well as videos and to communicate with friends. The potential of social media platforms is also being used for marketing purposes and for selling products. While for Facebook and other online social media platforms the purchase decision factors are investigated several times, Instagram stores remain mainly unattended so far. The present research work closes this gap and sheds light into decisive factors for purchasing products offered in Instagram stores. A theoretical research model, which contains selected constructs that are assumed to have a significant influence on Instagram user´s purchase intention, is developed. The hypotheses are evaluated by applying structural equation modelling on survey data containing 127 relevant participants. The results of the study reveal that ‘trust’, ‘personal recommendation’, and ‘usability’ significantly influences user’s buying intention in Instagram stores.
KW - Instagram store
KW - shopping behavior
KW - purchase factor
KW - PLS
KW - structural equation model
Y1 - 2023
N1 - ECIS 2023, European Conference on Information Systems, Kristiansand, Norway, June 11.-16.
SP - 1
EP - 17
ER -
TY - CHAP
A1 - Eggert, Mathias
A1 - Stanke, Max-Alexander
T1 - Adoption of Integrated Voice Assistants in Health Care– Requirements and Design Guidelines
T2 - 15th International Conference on Wirtschaftsinformatik, March 08-11, 2020 Potsdam, Germany
Y1 - 2020
U6 - http://dx.doi.org/10.30844/wi_2020_k2-eggert
SP - 1
EP - 16
ER -
TY - CHAP
A1 - Eggert, Mathias
A1 - Kriska, Melina
T1 - Gamification for software development processes – relevant affordances and design principles
T2 - Proceedings of the 55th Hawaii International Conference on System Sciences
N2 - A Gamified Information System (GIS) implements game concepts and elements, such as affordances and game design principles to motivate people. Based on the idea to develop a GIS to increase the motivation of software developers to perform software quality tasks, the research work at hand aims at investigating relevant requirements from that target group. Therefore, 14 interviews with software development experts are conducted and analyzed. According to the results, software developers prefer the affordances points, narrative storytelling in a multiplayer and a round-based setting. Furthermore, six design principles for the development of a GIS are derived.
Y1 - 2022
SN - 978-0-9981331-5-7
U6 - http://dx.doi.org/10.24251/HICSS.2022.200
N1 - Hawaii International Conference on System Sciences (HICSS) 2022, 04.01.2022 – 07.01.2022
SP - 1614
EP - 1623
PB - HICSS Publishing
CY - Honolulu
ER -