@inproceedings{5646,
  abstract     = {{While many theoretical arguments against or in favor of open source and closed source software development have been presented, the empirical basis for the assessment of arguments is still weak. Addressing this research gap, this paper presents a comprehensive empirical investigation of the patching behavior of software vendors/communities of widely deployed open source and closed source software packages, including operating systems, database systems, web browsers, email clients, and office systems. As the value of any empirical study relies on the quality of data available, this paper also discusses in detail data issues, explains to what extent the empirical analysis can be based on vulnerability data contained in the NIST National Vulnerability Database, and shows how data on vulnerability patches was collected by the author to support this study. The results of the analysis suggest that it is not the particular software development style that determines patching behavior, but rather the policy of the particular software vendor.}},
  author       = {{Schryen, Guido}},
  booktitle    = {{5th International Conference on IT Security Incident Management \& IT Forensics}},
  title        = {{{A comprehensive and comparative analysis of the patching behavior of open source and closed source software vendors}}},
  year         = {{2009}},
}

@inproceedings{5647,
  abstract     = {{Reviewing literature on open source and closed source security reveals that the discussion is often determined by biased attitudes toward one of these development styles. The discussion specifically lacks appropriate metrics, methodology and hard data. This paper contributes to solving this problem by analyzing and comparing published vulnerabilities of eight open source software and nine closed source software packages, all of which are widely deployed. Thereby, it provides an extensive empirical analysis of vulnerabilities in terms of mean time between vulnerability disclosures, the development of disclosure over time, and the severity of vulnerabilities, and allows for validating models provided in the literature. The investigation reveals that (a) the mean time between vulnerability disclosures was lower for open source software in half of the cases, while the other cases show no differences, (b) in contrast to literature assumption, 14 out of 17 software packages showed a significant linear or piecewise linear correlation between time and the number of published vulnerabilities, and (c) regarding the severity of vulnerabilities, no significant differences were found between open source and closed source.}},
  author       = {{Schryen, Guido}},
  booktitle    = {{15th Americas Conference on Information Systems}},
  keywords     = {{Vulnerabilities, security, open source software, closed source software, empirical comparison}},
  title        = {{{Security of open source and closed source software: An empirical comparison of published vulnerabilities}}},
  year         = {{2009}},
}

@article{6851,
  author       = {{Beutner, Marc and Frehe, Petra and Kremer, H.-Hugo and Zoyke, A.}},
  journal      = {{Kölner Zeitschrift für Wirtschaft und Pädagogik}},
  number       = {{47}},
  pages        = {{15--39}},
  title        = {{{Individuelle Förderung - Einblicke in Strukturen und erste empirische Ergebnisse des Modellprojekts InLab}}},
  year         = {{2009}},
}

@article{6852,
  author       = {{Beutner, Marc and Gebbe, M. and Kremer, H.-Hugo}},
  journal      = {{Kölner Zeitschrift für Wirtschaft und Pädagogik}},
  number       = {{47}},
  pages        = {{39--70}},
  title        = {{{Berufsbildung im Justizvollzug - Das Projekt TANDEM}}},
  year         = {{2009}},
}

@article{6853,
  author       = {{Kremer, H.-Hugo and Zoyke, Andrea}},
  journal      = {{Erziehungswissenschaft und Beruf}},
  number       = {{2}},
  pages        = {{163--175}},
  title        = {{{Individuelle Förderung von Kompetenzen - Curriculare und didaktisch-methodische Optionen}}},
  year         = {{2009}},
}

@inbook{6945,
  author       = {{Kremer, H.-Hugo}},
  booktitle    = {{Bildungsperspektiven in alternden Gesellschaften}},
  editor       = {{Dehmel, A. and Kremer, H.-H. and Schaper, N. and Sloane, P. F. E.}},
  pages        = {{247--260}},
  title        = {{{Bewältigung beruflicher Übergänge im Lebensverlauf}}},
  year         = {{2009}},
}

@inbook{6946,
  author       = {{Dehmel, A. and Kremer, H.-Hugo and Schaper, N. and Sloane, Peter F. E.}},
  booktitle    = {{Bildungsperspektiven in alternden Gesellschaften}},
  editor       = {{Dehmel, A. and Kremer, H.-H. and Schaper, N. and Sloane, P. F. E.}},
  pages        = {{9--30}},
  title        = {{{Performative Lebensbewältigung in alternden Gesellschaften: Projektbeschreibung und Einführung in den Tagungsband}}},
  year         = {{2009}},
}

@article{6947,
  author       = {{Kremer, H.-Hugo and Zoyke, A.}},
  journal      = {{Wirtschaft und Erziehung}},
  pages        = {{273--286}},
  title        = {{{Implementation von E-Learning an Berufskollegs - eine Studie zu Stand und Entwicklungsperspektiven in Ostwestfalen-Lippe}}},
  volume       = {{9}},
  year         = {{2009}},
}

@inbook{17131,
  author       = {{Becker, Jörg and Matzner, Martin and Müller, Oliver}},
  booktitle    = {{Information Systems Development}},
  isbn         = {{9780387848099}},
  pages        = {{207--215}},
  publisher    = {{Springer}},
  title        = {{{Comparing Architectural Styles for Service-Oriented Architectures – a REST vs. SOAP Case Study}}},
  doi          = {{10.1007/b137171_22}},
  year         = {{2009}},
}

@inproceedings{17132,
  author       = {{Becker, Jörg and Bergener, Katrin and Müller, Oliver and Müller-Wienbergen, Felix}},
  booktitle    = {{Americas Conference on Information Systems}},
  pages        = {{93}},
  title        = {{{Documentation of flexible business processes-A healthcare case study}}},
  year         = {{2009}},
}

@inproceedings{17133,
  author       = {{Müller-Wienbergen, Felix and Seidel, Stefan and Müller, Oliver and Knackstedt, Ralf and Becker, Joerg}},
  booktitle    = {{European Conference on Information Systems}},
  title        = {{{A design research study on enhancing creativity-The case of developing product-service bundles}}},
  year         = {{2009}},
}

@techreport{14916,
  author       = {{Dahle, Claudia and Bäumer, Michaela}},
  title        = {{{Cross-Border Group-Taxation and Loss-Offset in the EU - An Analysis for CCCTB (Common Consolidated Corporate Tax Base) and ETAS (European Tax Allocation System)}}},
  volume       = {{66}},
  year         = {{2009}},
}

@article{14917,
  author       = {{Halberstadt, Alexander and Sureth-Sloane, Caren and Voß, Armin}},
  journal      = {{Die Wirtschaftsprüfung}},
  number       = {{6}},
  pages        = {{373--381}},
  title        = {{{Der Einfluss der Abgeltungssteuer auf die Vorteilhaftigkeit von Anlagen in Genussscheine und Aktien}}},
  volume       = {{62}},
  year         = {{2009}},
}

@techreport{14920,
  author       = {{Niemann, Rainer and Sureth-Sloane, Caren}},
  title        = {{{Investment Effects of Capital Gains Taxation under Simultaneous Investment and Abandonment Flexibility}}},
  volume       = {{77}},
  year         = {{2009}},
}

@techreport{14921,
  author       = {{Nordhoff, Daniel}},
  title        = {{{Umsatzsteuerausfall und Umsatzsteuerbetrug - Eine steuerökonomische Analyse der Umsatzsteuerdeklaration}}},
  year         = {{2009}},
}

@article{14922,
  author       = {{Nordhoff, Daniel and Popp, Matthias}},
  journal      = {{Niedersächsische Wirtschaft}},
  number       = {{9}},
  pages        = {{16--17}},
  title        = {{{Strukturprobleme angehen}}},
  year         = {{2009}},
}

@techreport{14924,
  author       = {{Sureth-Sloane, Caren and Vollert, Pia}},
  title        = {{{Verschärfung der Verlustabzugsbeschränkung durch § 8c KStG und deren Einfluss auf den Erwerb von Anteilen an Kapitalgesellschaften}}},
  volume       = {{91}},
  year         = {{2009}},
}

@inbook{14946,
  author       = {{Niemann, Rainer and Sureth-Sloane, Caren}},
  booktitle    = {{Festzeitschrift für Franz W. Wagner: Accounting, Taxation, and Corporate Governance}},
  editor       = {{Kiesewetter, Dirk and Niemann, Rainer}},
  pages        = {{K1--K35}},
  title        = {{{Investment Effects of Capital Gains Taxation under Simultaneous Investment and Abandonment Flexibility}}},
  year         = {{2009}},
}

@article{13257,
  author       = {{Trier, Matthias and Bobrik, Annette}},
  issn         = {{1089-7801}},
  journal      = {{IEEE Internet Computing}},
  pages        = {{51--59}},
  title        = {{{Social Search: Exploring and Searching Social Architectures in Digital Networks}}},
  doi          = {{10.1109/mic.2009.44}},
  year         = {{2009}},
}

@inproceedings{13312,
  author       = {{Sanmateu, Maria-Amparo and Trier, Matthias and Lienicke, Andreas and Rederer, Andreas}},
  booktitle    = {{9th International Conference On Innovative Internet Community Systems I2CS 2010}},
  editor       = {{Erfurth, Christian AND Eichler, Gerald AND Schau, Volkmar}},
  pages        = {{ 27--35 }},
  publisher    = {{Gesellschaft für Informatik e.V.}},
  title        = {{{Enabling social media content quality assurance using social network analysis}}},
  year         = {{2009}},
}