@techreport{20869, abstract = {{This study provides evidence of significant biases in multi-year management forecasts by analyzing a proprietary dataset on venture-backed start-ups in Germany. We find that revenues and expenses are highly overestimated in each of the investigated one- to five-year-ahead planning periods. Furthermore, entrepreneurs underestimate one-year-ahead profit forecasts but clearly overestimate their profit forecasts for all longer-term forecast horizons. Additional analyses reveal that teams with prior management experience issue even more overestimated forecasts and misrepresent their forward-looking information. In contrast, greater asset verifiability and corporate lead investors are associated with lower levels of forecast errors. All key results hold if bias is either measured by traditionally comparing forecasts to ex-post realizations or by using a cross-sectional projection approach based on historical accounting data developed by prior research.}}, author = {{Sievers, Sönke and Mokwa, Christopher Frederik}}, keywords = {{Management forecasts, Forecasting biases, Venture-backed start-ups, Projection methods}}, pages = {{42}}, title = {{{Biases in Management Forecasts of Venture-Backed Start-Ups: Evidence from Internal Due Diligence Documents of VC Investors}}}, doi = {{10.2139/ssrn.1714399}}, year = {{2012}}, } @techreport{20870, abstract = {{This study shows how venture capital investors can identify potential biases in multi-year management forecasts before an investment decision and derive significantly more accurate failure predictions. By advancing a cross-sectional projection method developed by prior research and using firm-specific information in financial statements and business plans, we derive benchmarks for management revenue forecasts. With these benchmarks, we estimate forecast errors as an a priori measure of biased expectations. Using this measure for our proprietary dataset on venture-backed start-ups in Germany, we find evidence of substantial upward forecast biases. We uncover that firms with large forecast errors fail significantly more often than do less biased entrepreneurs in years following the investment. Overall, our results highlight the implications of excessive optimism and overconfidence in entrepreneurial environments and emphasize the relevance of accounting information and business plans for venture capital investment decisions.}}, author = {{Sievers, Sönke and Mokwa, Christopher Frederik}}, keywords = {{Management forecast biases, cross-sectional projection models, venture-backed start-ups, failure prediction, overoptimism, overconfidence}}, pages = {{31}}, title = {{{The Relevance of Biases in Management Forecasts for Failure Prediction in Venture Capital Investments}}}, doi = {{10.2139/ssrn.2100501}}, year = {{2012}}, } @inbook{20914, abstract = {{This chapter summarizes the application and evaluation of the SPES engineering methodology in the automotive domain. After introducing the particular domain characteristics, we state some research questions that we have investigated. Some of the activities that address these research questions are presented in detail. We conclude that the SPES engineering methodology is a good basis for the development of automotive systems, but could be further refined to fit the particular needs of the domain.}}, author = {{Fockel, Markus and Heidl, Peter and Höfflinger, Jens and Hönninger, Harald and Holtmann, Jörg and Horn, Wilfried and Meyer, Jan and Meyer, Matthias and Schäuffele, Jörg}}, booktitle = {{Model-Based Engineering of Embedded Systems}}, isbn = {{9783642346132}}, title = {{{Application and Evaluation in the Automotive Domain}}}, doi = {{10.1007/978-3-642-34614-9_12}}, year = {{2012}}, } @misc{17999, author = {{Meith, Frank Ingo}}, title = {{{Jamming-resistente MAC-Protokolle}}}, year = {{2012}}, } @inproceedings{1805, author = {{Biermann, T. and Scalia, L.}}, booktitle = {{2011 IEEE Global Telecommunications Conference - GLOBECOM 2011}}, isbn = {{9781424492688}}, publisher = {{IEEE}}, title = {{{Mobile WDM Backhaul Access Networks with Physical Inter-Base-Station Links for Coordinated Multipoint Transmission/Reception Systems}}}, doi = {{10.1109/glocom.2011.6133510}}, year = {{2012}}, } @inproceedings{1806, author = {{Choi, Changsoon and Scalia, Luca and Biermann, Thorsten and Mizuta, Shinj}}, booktitle = {{2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications}}, isbn = {{9781457713484}}, publisher = {{IEEE}}, title = {{{Coordinated multipoint multiuser-MIMO transmissions over backhaul-constrained mobile access networks}}}, doi = {{10.1109/pimrc.2011.6139719}}, year = {{2012}}, } @book{18065, editor = {{Ganguin, S. and Meister, Dorothee M.}}, publisher = {{kopaed}}, title = {{{Digital native oder digital naiv? Medienpädagogik der Generationen}}}, year = {{2012}}, } @inbook{18087, author = {{Meister, Dorothee M.}}, booktitle = {{Erwägen Wissen Ethik. Jg. 23/2012 (Heft 3). }}, pages = {{379 -- 380}}, publisher = {{Lucius & Lucius Verlagsges. mbH}}, title = {{{Vermittlungswissenschaft in der Wissensgesellschaft}}}, volume = {{Heft 3}}, year = {{2012}}, } @inbook{18088, author = {{Kamin, A.-M. and Meister, Dorothee M.}}, booktitle = {{Ludwigsburger Beiträge zur Medienpädagogik. Schwerpunkt "Inklusive Medienbildung" Ausgabe 15 / 2012}}, title = {{{Bildungschancen eröffnen durch inklusive Medienbildung - das Paderborner Recycling Projekt (pb.re.pc)}}}, year = {{2012}}, } @inbook{18089, author = {{Meister, Dorothee M. and Müller-Lietzkow, J. and Burkatzki, E. and Kröger, S.}}, booktitle = {{Computer Games and New Media Cultures. A Handbook of Digital Games Studies}}, editor = {{Fromme, J. and Unger, A.}}, pages = {{295 -- 315}}, publisher = {{Springer}}, title = {{{Computer Games in the Context of Adolecents Media Behavior}}}, year = {{2012}}, } @inbook{18090, author = {{Meister, Dorothee M. and Meise, B.}}, booktitle = {{Schriftenreihe Psychologie und Gesellschaft. Medien in unserer Gesellschaft - Chancen und Risiken}}, editor = {{Schweer, M.K.W.}}, pages = {{51 -- 72}}, publisher = {{Peter Lang}}, title = {{{Genesen und Spezifika jugendlichen Medienhandels}}}, year = {{2012}}, } @inbook{18091, author = {{Kamin, A.-M. and Ganguin, S. and Meister, Dorothee M.}}, booktitle = {{Digital native oder digital naiv? Medienpädagogik der Generationen}}, editor = {{Ganguin, S. and Meister, Dorothee M.}}, pages = {{99 -- 109}}, publisher = {{kopaed}}, title = {{{Digitale Lernangebote bei älteren Berufstätigen: Zwischen Akzeptanz und Vorbehalt}}}, year = {{2012}}, } @inbook{18092, author = {{Ganguin, S. and Meister, Dorothee M.}}, booktitle = {{Digital native oder digital naiv? Medienpädagogik der Generationen}}, editor = {{Ganguin, S. and Meister, Dorothee M.}}, pages = {{11 -- 15}}, publisher = {{kopaed}}, title = {{{Medienpädagogik der Generation - Einführende Überlegungen}}}, year = {{2012}}, } @inproceedings{22174, abstract = {{The quality of laser sintered parts, in this work, manufactured by polymer laser sintering by using an EOSINT P395 Laser Sintering system, depends on several steps along the process chain. The first step is the characterization of the powder quality, whereas the rheological and physical investigations of nylon 12 powder are shown. By changing some important influencing factors, for example the powder ratio, the powder ageing and the moisture content, the influence on mechanical and physical properties, density and porosity, are investigated. The composition of the used powder is known. The previous process (storage conditions, etc.) as well as the laser sintering process (regarding energy density, temperature, etc.) is kept constant for the duration of this work. Regarding the post process in this work the cooling down phase is investigated as well. With an automatically blasting system it is possible to keep the post process parameters blasting distance and blasting time, constant. All of the tests will be performed using dry and conditioned test specimens. This work is showing the dependence on mechanical, rheological and physical parameters by varying important influencing factors along the laser sintering process quality chain.}}, author = {{Rüsenberg, Stefan and Weiffen, R. and Knoop, F. and Schmid, Hans-Joachim}}, booktitle = {{23rd Annual International Solid Freeform Fabrication Symposium}}, pages = {{1024--1044}}, title = {{{Controlling the Quality of Laser Sintered Parts Along the Process Chain}}}, doi = {{http://utw10945.utweb.utexas.edu/Manuscripts/2012/2012-78-Ruesenberg.pdf}}, volume = {{23}}, year = {{2012}}, } @inproceedings{22204, abstract = {{Material properties of parts from additive manufacturing are influenced by a huge number of material, operational and job parameters. This work aims to identify the most important ones and to investigate mechanical properties as depending on those parameters. Test specimens were produced with standard PA12 powder on an EOSINT P390 and P395, respectively. The influence of the orientation and placement of parts in the building chamber were investigated systematically. The mechanical properties}}, author = {{Rüsenberg, Stefan and Schmid, Hans-Joachim}}, booktitle = {{The European Forum on Additive Manufacturing}}, title = {{{Mechanical Properties as a Result of multitude of Parameters}}}, doi = {{https://afpr.asso.fr/content/assises/2012/actes/papiers/s5_2.pdf}}, volume = {{17}}, year = {{2012}}, } @inproceedings{22364, author = {{Adam, Guido and Zimmer, Detmar}}, title = {{{Elementbasierte Erarbeitung von Konstruktionsregeln für additive Fertigung}}}, year = {{2012}}, } @article{22365, author = {{Zimmer, Detmar and Lessmeier, Christian and Hameyer, Kay and Piantsop Mbo'o, Christelle and Coenen, Isabel}}, journal = {{ant Journal - Anwendungsnahe Forschung für Antriebstechnik im Maschinenbau }}, pages = {{8--13}}, publisher = {{Vereinigte Fachverlage GmbH}}, title = {{{Untersuchung von Bauteilschäden elektrischer Antriebsstränge im Belastungsprüfstand mittels Statorstromanalyse}}}, volume = {{1}}, year = {{2012}}, } @inproceedings{22366, author = {{Kriegel, Nils-Peter and Wecker, Markus and Zimmer, Detmar}}, booktitle = {{VDI-Konferenz Innovative Bremstechnik}}, publisher = {{Verein Deutscher Ingenieure (VDI)}}, title = {{{Anforderungen an Bremssysteme in der industriellen Antriebstechnik}}}, volume = {{2}}, year = {{2012}}, } @book{22367, author = {{Lessmeier, Christian and Piantsop Mbo'o, Christelle and Coenen, Isabel and Zimmer, Detmar and Hameyer, Kay}}, isbn = {{978-3-941277-17-5}}, pages = {{509--521}}, publisher = {{Aachener Schriften zur Rohstoff- und Entsorgungstechnik des Instituts für Maschinentechnik der Rohstoffindustrie}}, title = {{{Untersuchung von Bauteilschäden elektrischer Antriebsstränge im Belastungsprüfstand mittels Statorstromanalyse}}}, volume = {{81}}, year = {{2012}}, } @article{22368, author = {{Kriegel, Nils-Peter and Zimmer, Detmar}}, isbn = {{1613-5504}}, journal = {{Newsletter der Wissenschaftlichen Gesellschaft für Produktentwicklung }}, pages = {{16--17}}, publisher = {{Wissenschaftliche Gesellschaft für Produktentwicklung WiGeP}}, title = {{{Anforderungen an Bremssysteme der industriellen Antriebstechnik}}}, doi = {{http://www.wigep.de/fileadmin/download/wigep/WiGeP_News_2012_2.pdf}}, volume = {{2}}, year = {{2012}}, }