@article{BhattacharyyaBenimChattopadhyayetal.2019, author = {Bhattacharyya, Suvanjan and Benim, Ali Cemal and Chattopadhyay, Himadri and Banerjee, Arnab}, title = {Experimental investigation of heat transfer performance of corrugated tube with spring tape inserts}, series = {Experimental Heat Transfer}, volume = {32}, journal = {Experimental Heat Transfer}, number = {5}, publisher = {Taylor \& Francis}, issn = {0891-6152}, doi = {10.1080/08916152.2018.1531955}, pages = {411 -- 425}, year = {2019}, language = {en} } @article{LangmannMichael2019, author = {Langmann, Reinhard and Michael, Stiller}, title = {The PLC as a Smart Service in Industry 4.0 Production System}, series = {Applied Sciences}, volume = {9}, journal = {Applied Sciences}, number = {18}, publisher = {MDPI}, issn = {2076-3417}, doi = {10.3390/app9183815}, year = {2019}, language = {en} } @article{MiguelesRowlandsHuberetal.2019, author = {Migueles, Jairo H. and Rowlands, Alex V. and Huber, Florian and Sabia, S{\´e}verine and van Hees, Vincent T.}, title = {GGIR: A Research Community-Driven Open Source R Package for Generating Physical Activity and Sleep Outcomes From Multi-Day Raw Accelerometer Data}, series = {Journal for the Measurement of Physical Behaviour}, volume = {2}, journal = {Journal for the Measurement of Physical Behaviour}, number = {3}, publisher = {Human Kinetics}, issn = {2575-6605}, doi = {10.1123/jmpb.2018-0063}, pages = {188 -- 196}, year = {2019}, language = {en} } @article{NebelSchmidtPanetal.2019, author = {Nebel, Janine and Schmidt, Stefan and Pan, Qiushi and Lotz, Katrin and Kaluza, Stefan and Muhler, Martin}, title = {On the role of cobalt carbidization in higher alcohol synthesis over hydrotalcite-based Co-Cu catalysts}, series = {Chinese Journal of Catalysis}, volume = {40}, journal = {Chinese Journal of Catalysis}, number = {11}, publisher = {Elsevier}, issn = {1872-2067}, doi = {10.1016/S1872-2067(19)63344-9}, pages = {1731 -- 1740}, year = {2019}, language = {en} } @article{GirodBreitkreuzHenningetal.2019, author = {Girod, Kai and Breitkreuz, Klaas and Henning, Torsten and Lohmann, Heiko and Kaluza, Stefan and Schluter, Stefan}, title = {Steel Mills as Syngas Source for Methanol Synthesis: Simulation and Practical Performance Investigations}, series = {Chemical Engineering Transactions}, volume = {74}, journal = {Chemical Engineering Transactions}, publisher = {AIDIC}, isbn = {978-88-95608-71-6}, issn = {2283-9216}, doi = {10.3303/CET1974080}, pages = {475 -- 480}, year = {2019}, abstract = {In the present contribution, the utilization of steel-mill gases for an industrial methanol synthesis process is described. The focus of this work is on the influence of syngas compositions derived from steel-mill gases on an industrial Cu/ZnO/Al2O3 catalyst. Elevated CO2 and H2O concentrations seem to have an irreversible impact on the activity of the catalyst. In order to obtain realistic gas composition for the catalyst tests, a process simulation of the methanol synthesis was conducted. The calculated gas compositions at the reactor inlet were applied in a practical test in order to evaluate the catalyst stability under steel mill gas conditions. No noticeable deactivation was observed.}, language = {en} } @article{Haeusler2019, author = {H{\"a}usler, Alexander}, title = {Kumulative Radikalisierung: Der v{\"o}lkisch-autorit{\"a}re Populismus der AfD}, series = {Forschungsjournal Soziale Bewegungen}, journal = {Forschungsjournal Soziale Bewegungen}, number = {1}, publisher = {De Gruyter}, issn = {2365-9890}, doi = {10.1515/fjsb-2019-0010}, pages = {83 -- 87}, year = {2019}, language = {de} } @article{FehlauvanRiessen2019, author = {Fehlau, Michael and van Rießen, Anne}, title = {Jugendsozialarbeit in historischer Perspektive}, series = {Sozialmagazin}, volume = {44}, journal = {Sozialmagazin}, number = {7-8}, publisher = {DZI}, organization = {DZI}, issn = {0340-8469}, pages = {8 -- 13}, year = {2019}, language = {de} } @article{BiedermannReichKameieretal.2019, author = {Biedermann, Till M. and Reich, Marius and Kameier, Frank and Adam, Mario}, title = {Assessment of statistical sampling methods and approximation models applied to aeroacoustic and vibroacoustic problems}, series = {Advances in Aircraft and Spacecraft Science}, volume = {6}, journal = {Advances in Aircraft and Spacecraft Science}, number = {6}, publisher = {Techno Press}, issn = {2287-528X}, doi = {10.12989/aas.2019.6.6.531}, pages = {529 -- 550}, year = {2019}, language = {en} } @article{DeckertSchomaker2019, author = {Deckert, Carsten and Schomaker, Rahel M.}, title = {Kultur und Innovation - Wie sich kulturelle Faktoren auf die nationale Innovationsf{\"a}higkeit auswirken}, series = {Der Betriebswirt}, volume = {60}, journal = {Der Betriebswirt}, number = {2}, publisher = {Duncker \& Humblot}, issn = {2628-7846}, doi = {10.3790/dbw.60.2.18}, pages = {18 -- 23}, year = {2019}, language = {de} } @article{PfeiffelmannBenimJoos2019, author = {Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal and Joos, Franz}, title = {A Finite Volume Analysis of Thermoelectric Generators}, series = {Heat Transfer Engineering}, volume = {40}, journal = {Heat Transfer Engineering}, number = {17-18}, publisher = {Taylor \& Francis}, issn = {0145-7632}, doi = {10.1080/01457632.2018.1474588}, pages = {1442 -- 1450}, year = {2019}, language = {en} } @article{GuoDoRuess2019, author = {Guo, Y. and Do, H. and Ruess, Martin}, title = {Isogeometric stability analysis of thin shells: From simple geometries to engineering models}, series = {International Journal for Numerical Methods in Engineering}, volume = {118}, journal = {International Journal for Numerical Methods in Engineering}, number = {8}, publisher = {Wiley}, issn = {1097-0207}, doi = {10.1002/nme.6020}, pages = {433 -- 458}, year = {2019}, language = {en} } @article{HeinzeFehselJappe2019, author = {Heinze, Thomas and Fehsel, Imke and Jappe, Arlette}, title = {Reformimpulse durch hochschulpolitische Beratung? Eine empirische Analyse der Funktion und Wirkung des Wissenschaftsrates f{\"u}r das deutsche Universit{\"a}tssystem}, series = {Soziale Welt}, volume = {70}, journal = {Soziale Welt}, number = {3}, publisher = {Nomos}, doi = {10.5771/0038-6073-2019-3-268}, pages = {268 -- 303}, year = {2019}, language = {de} } @article{BenimPfeiffelmannOcłońetal.2019, author = {Benim, Ali Cemal and Pfeiffelmann, Bj{\"o}rn and Ocłoń, Paweł and Taler, Jan}, title = {Computational investigation of a lifted hydrogen flame with LES and FGM}, series = {Energy}, volume = {173}, journal = {Energy}, publisher = {Elsevier}, issn = {0360-5442}, doi = {10.1016/j.energy.2019.02.133}, pages = {1172 -- 1181}, year = {2019}, language = {en} } @article{BiedermannCzeckayGeyeretal.2019, author = {Biedermann, Till M. and Czeckay, Pasquale and Geyer, Thomas F. and Kameier, Frank and Paschereit, Christian O.}, title = {Effect of Inflow Conditions on the Noise Reduction Through Leading Edge Serrations}, series = {AIAA Journal}, volume = {57}, journal = {AIAA Journal}, number = {9}, publisher = {ARC}, issn = {1533-385X}, doi = {10.2514/1.j057831}, pages = {4104 -- 4109}, year = {2019}, language = {en} } @article{EurichKlenznerOehler2019, author = {Eurich, Bernhard and Klenzner, Thomas and Oehler, Michael}, title = {Impact of room acoustic parameters on speech and music perception among participants with cochlear implants}, series = {Hearing research}, volume = {377}, journal = {Hearing research}, publisher = {Elsevier}, doi = {10.1016/j.heares.2019.03.012}, pages = {122 -- 132}, year = {2019}, language = {en} } @article{BhattacharyyaGobindaDasChattopadhyayetal.2019, author = {Bhattacharyya, Suvanjan and Gobinda Das, Sampad and Chattopadhyay, Himadri and Benim, Ali Cemal and Moghimi, M. A.}, title = {Transport Phenomenon of Simultaneously Developing Flow and Heat Transfer in Twisted Sinusoidal Wavy Microchannel under Pulsating Inlet Flow Condition}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, doi = {10.1051/e3sconf/201912801011}, year = {2019}, language = {en} } @article{RichterSteenmannSchellscheidtetal.2019, author = {Richter, Jessica and Steenmann, Anna and Schellscheidt, Benjamin and Licht, Thomas}, title = {On-Chip Diffusion Bonding creates Stable Interconnections Usable at Temperatures over 300°C}, series = {International Symposium on Microelectronics}, volume = {2019}, journal = {International Symposium on Microelectronics}, number = {1}, publisher = {IMAPS}, organization = {IMAPS}, doi = {10.4071/2380-4505-2019.1.000530}, pages = {000530 -- 000534}, year = {2019}, language = {en} } @article{MoellmannHungerDusendetal.2019, author = {M{\"o}llmann, Anne and Hunger, Antje and Dusend, Christina and van den Hout, Marcel and Buhlmann, Ulrike}, title = {Gazing at facial features increases dissociation and decreases attractiveness ratings in non-clinical females - A potential explanation for a common ritual in body dysmorphic disorder}, series = {PloS one}, volume = {14}, journal = {PloS one}, number = {7}, publisher = {PLoS}, organization = {PLoS}, doi = {10.1371/journal.pone.0219791}, year = {2019}, abstract = {Rituals, such as gazing at faces, are common in body dysmorphic disorder (BDD) and appear in cognitive-behavioral models as a maintaining factor. Rituals are also common in obsessive-compulsive disorder (OCD). In contrast to OCD, the proposed associations between rituals and intrusive thoughts/appearance preoccupation have not been empirically investigated for BDD. We examined if the assumed effect of gazing rituals on attractiveness ratings exists and if it is associated with dissociation. In an experiment, we asked N = 65 non-clinical females to focus on the nose of a photographed face at pre- and post-test. In between, participants gazed at the nose of either the same (relevant gazing) or another face (irrelevant gazing). We found increasing dissociation after gazing in both conditions and a differentially stronger decrease of attractiveness ratings in the relevant gazing condition. Our findings support the hypothesized effect of gazing rituals on attractiveness evaluation in cognitive-behavioral models for BDD.}, language = {en} } @article{KernebeckHollePogschebaetal.2019, author = {Kernebeck, Sven and Holle, Daniela and Pogscheba, Patrick and Jordan, Felix and Mertl, Fabian and Huldtgren, Alina and Bader, Sebastian and Kirste, Thomas and Teipel, Stefan and Holle, Bernhard and Halek, Margareta}, title = {A Tablet App- and Sensor-Based Assistive Technology Intervention for Informal Caregivers to Manage the Challenging Behavior of People With Dementia (the insideDEM Study): Protocol for a Feasibility Study}, series = {JMIR research protocols}, volume = {8}, journal = {JMIR research protocols}, number = {2}, publisher = {JMIR}, doi = {10.2196/11630}, year = {2019}, language = {en} } @article{ElQasem2019, author = {El-Qasem, Kawthar}, title = {Oral transmission as meta-occupation: The significance of historically passed on meanings of everyday life in processes of deculturalization}, series = {Journal of Occupational Science}, volume = {26}, journal = {Journal of Occupational Science}, number = {2}, publisher = {Taylor \& Francis}, issn = {2158-1576}, doi = {10.1080/14427591.2019.1608843}, pages = {275 -- 293}, year = {2019}, language = {en} } @article{DeutschReimesFiebigetal.2019, author = {Deutsch, Thomas and Reimes, Jan and Fiebig, Andr{\´e} and Oehler, Michael}, title = {Relevance of stimuli and test environment in the perceptual evaluation of car audio systems}, series = {Applied Acoustics}, volume = {156}, journal = {Applied Acoustics}, publisher = {Elsevier}, doi = {10.1016/j.apacoust.2019.07.027}, pages = {404 -- 415}, year = {2019}, language = {en} } @article{BiedermannKameierPaschereit2019, author = {Biedermann, Till M. and Kameier, F. and Paschereit, C. O.}, title = {Successive Aeroacoustic Transfer of Leading Edge Serrations From Single Airfoil to Low-Pressure Fan Application}, series = {Journal of Engineering for Gas Turbines and Power}, volume = {141}, journal = {Journal of Engineering for Gas Turbines and Power}, number = {10}, publisher = {ASME}, doi = {10.1115/1.4044362}, year = {2019}, language = {en} } @article{Hoerner2019, author = {H{\"o}rner, Fernand}, title = {Das Spiel (in) der Diskursanalyse}, series = {kultuRRevolution}, journal = {kultuRRevolution}, number = {76}, publisher = {krr.}, pages = {64 -- 71}, year = {2019}, language = {de} } @article{DeckertSchomaker2019, author = {Deckert, Carsten and Schomaker, Rahel M.}, title = {Cultural Impacts on National Innovativeness: Not Every Cultural Dimension Is Equal}, series = {Cross-Cultural Research}, volume = {53}, journal = {Cross-Cultural Research}, number = {2}, publisher = {sage journals}, doi = {10.1177/1069397118799700}, pages = {186 -- 214}, year = {2019}, language = {en} } @article{BhattacharyyaChattopadhyayGuinetal.2019, author = {Bhattacharyya, Suvanjan and Chattopadhyay, Himadri and Guin, Anindya and Benim, Ali Cemal}, title = {Investigation of Inclined Turbulators for Heat Transfer Enhancement in a Solar Air Heater}, series = {Heat Transfer Engineering}, volume = {40}, journal = {Heat Transfer Engineering}, number = {17/18}, publisher = {Taylor \& Francis}, doi = {10.1080/01457632.2018.1474593}, pages = {1451 -- 1460}, year = {2019}, language = {en} } @article{vanRiessenBleck2019, author = {van Rießen, Anne and Bleck, Christian}, title = {Partizipative Sozialraumforschung mit Menschen mit Flucht- und Zuwanderungsgeschichte aus der Perspektive der Sozialen Arbeit: Methodische {\"U}berlegungen und Erfahrungen f{\"o}rdernder wie hemmender Faktoren}, series = {{\"O}sterreichische Zeitschrift f{\"u}r Soziologie}, volume = {44}, journal = {{\"O}sterreichische Zeitschrift f{\"u}r Soziologie}, number = {S3}, publisher = {Springer}, issn = {1011-0070}, doi = {10.1007/s11614-019-00365-0}, pages = {45 -- 59}, year = {2019}, language = {de} } @article{TappenbeckSahlerWuestetal.2019, author = {Tappenbeck, Inka and Sahler, Laura and W{\"u}st, Janina and M{\"u}hling, Annika and Piontkowitz, Pia and Rothe, Verena and Roth, Dominique and Faust, Luisa and Sch{\"u}ßler, Pia and Schubert, Peter}, title = {Attraktive E-Learning-Angebote schnell und kostenfrei entwickeln? Kein Problem! Beispiele aus den bibliothekswissenschaftlichen Studieng{\"a}ngen der TH K{\"o}ln}, series = {o-bib. Das offene Bibliotheksjournal}, volume = {6}, journal = {o-bib. Das offene Bibliotheksjournal}, number = {2}, publisher = {VDB}, doi = {10.5282/o-bib/2019H2S33-47}, pages = {33 -- 47}, year = {2019}, abstract = {Der Beitrag stellt am Beispiel von studentischen Projekt- und Praxisarbeiten aus den bibliothekswissenschaftlichen Studieng{\"a}ngen der TH K{\"o}ln M{\"o}glichkeiten der Erstellung von E-Learning-Angeboten vor, die sich in kurzer Zeit und ohne finanzielles Budget realisieren lassen. Der Fokus liegt dabei auf unkonventionellen Darstellungsformen wie bspw. Comic-artigen Animationsfilmen oder der Pr{\"a}sentation bibliothekarischer Inhalte nach dem Modell von „Sommers Weltliteratur". Der Beitrag m{\"o}chte Bibliotheken dazu anregen, im Kontext des E-Learning mit neuen Formaten zu experimentieren, die dazu beitragen k{\"o}nnen, die Attraktivit{\"a}t der bibliothekarischen Angebote zu erh{\"o}hen und die sich gleichzeitig mit geringem zeitlichem und finanziellem Aufwand realisieren lassen.}, language = {de} } @article{GrebSteffensSchlotz2019, author = {Greb, Fabian and Steffens, Jochen and Schlotz, Wolff}, title = {Modeling Music-Selection Behavior in Everyday Life: A Multilevel Statistical Learning Approach and Mediation Analysis of Experience Sampling Data}, series = {Frontiers in psychology}, volume = {10}, journal = {Frontiers in psychology}, publisher = {Frontiers}, doi = {10.3389/fpsyg.2019.00390}, year = {2019}, abstract = {Music listening has become a highly individualized activity with smartphones and music streaming services providing listeners with absolute freedom to listen to any kind of music in any situation. Until now, little has been written about the processes underlying the selection of music in daily life. The present study aimed to disentangle some of the complex processes among the listener, situation, and functions of music listening involved in music selection. Utilizing the experience sampling method, data were collected from 119 participants using a smartphone application. For 10 consecutive days, participants received 14 prompts using stratified-random sampling throughout the day and reported on their music-listening behavior. Statistical learning procedures on multilevel regression models and multilevel structural equation modeling were used to determine the most important predictors and analyze mediation processes between person, situation, functions of listening, and music selection. Results revealed that the features of music selected in daily life were predominantly determined by situational characteristics, whereas consistent individual differences were of minor importance. Functions of music listening were found to act as a mediator between characteristics of the situation and music-selection behavior. We further observed several significant random effects, which indicated that individuals differed in how situational variables affected their music selection behavior. Our findings suggest a need to shift the focus of music-listening research from individual differences to situational influences, including potential person-situation interactions.}, language = {en} } @article{AngladaTortSteffensMuellensiefen2019, author = {Anglada-Tort, Manuel and Steffens, Jochen and M{\"u}llensiefen, Daniel}, title = {Names and titles matter: The impact of linguistic fluency and the affect heuristic on aesthetic and value judgements of music}, series = {Psychology of Aesthetics, Creativity, and the Arts}, volume = {13}, journal = {Psychology of Aesthetics, Creativity, and the Arts}, number = {3}, publisher = {APA}, doi = {10.1037/aca0000172}, pages = {277 -- 292}, year = {2019}, language = {en} } @article{RosenfeldSteffens2019, author = {Rosenfeld, Ninett and Steffens, Jochen}, title = {Effects of congruency of combined audiovisual stimuli in movie scenes on perceived emotions in the context of film reception}, series = {Psychomusicology: Music, Mind \& Brain}, volume = {29}, journal = {Psychomusicology: Music, Mind \& Brain}, number = {4}, publisher = {APA}, doi = {10.1037/pmu0000242}, pages = {200 -- 208}, year = {2019}, language = {en} } @article{TophovenReimsTisch2019, author = {Tophoven, Silke and Reims, Nancy and Tisch, Anita}, title = {Vocational Rehabilitation of Young Adults with Psychological Disabilities}, series = {Journal of Occupational Rehabilitation}, volume = {29}, journal = {Journal of Occupational Rehabilitation}, number = {1}, publisher = {Springer}, doi = {10.1007/s10926-018-9773-y}, pages = {150 -- 162}, year = {2019}, abstract = {Objective Vocational rehabilitation measures support youth and young adults with disabilities to obtain vocational training and to enter the labor market. In Germany, a growing number of young people with psychological disabilities in vocational rehabilitation can be observed. The study at hand focuses on this group and examines their (un-)unemployment biographies before vocational rehabilitation, their access to vocational rehabilitation and identifies their individual challenges within the process of vocational rehabilitation. Methods Using a multi-methods approach, we analyze representative administrative data of the German Federal Employment Agency as well as biographical interviews conducted with young rehabilitants. We compare the population of young rehabilitants with psychological disorders to those with other disabilities in terms of vocational rehabilitation and initial labor market entry in order to get a representative picture about their school to work transitions. Since rehabilitants with psychological disabilities tend to be older than the remaining population, analyses are stratified by age groups. In addition, qualitative in-depth interviews provide an additional and deeper understanding of specific employment barriers youth with psychological disorders have to overcome. Furthermore, the individual perspective gives insight on how the crucial transition from school to work is perceived by the population under study. Results The pathway into vocational rehabilitation of youth with psychological disorders is often characterized by obstacles in their transition from school to work. During rehabilitation, it appears essential to provide psychological stabilization along with vocational training. Although their average level of education is higher than those of other rehabilitants, labor market transition after (often company-external) vocational training challenges many young people with psychological disabilities, leaving many of them with comparatively poor labor market prospects. Conclusions Young persons with psychological disabilities, who come from regular schools or dropped out from regular school or university, seem to find their way to vocational rehabilitation more indirectly. Furthermore, vocational rehabilitation itself is often prolonged for those with psychological disabilities possibly due to a corresponding stabilization process. However, vocational rehabilitation can be a core element within the stabilization process of a psychological disease.}, language = {en} } @article{HiesingerTophoven2019, author = {Hiesinger, Karolin and Tophoven, Silke}, title = {Job requirement level, work demands, and health: a prospective study among older workers}, series = {International Archives of Occupational and Environmental Health}, volume = {92}, journal = {International Archives of Occupational and Environmental Health}, publisher = {Springer Nature}, doi = {10.1007/s00420-019-01451-2}, pages = {1139 -- 1149}, year = {2019}, language = {en} } @article{Khabyuk2019, author = {Khabyuk, Olexiy}, title = {F{\"u}nf Thesen zur Zukunft der Kommunikation}, series = {Schweitzer Forum}, journal = {Schweitzer Forum}, number = {2}, pages = {24 -- 25}, year = {2019}, language = {de} } @article{Deckert2019, author = {Deckert, Carsten}, title = {Spannungsfelder der Teamkreativit{\"a}t: Wie Teamklima und -kontext zur Kreativit{\"a}t beitragen}, series = {Ideen und Innovationsmanagement}, journal = {Ideen und Innovationsmanagement}, number = {4}, issn = {2198-3143}, pages = {116 -- 120}, year = {2019}, abstract = {Dieser Beitrag untersucht die Spannungsfelder der Teamkreativit{\"a}t. Die Spannungsfelder basieren auf einer grundlegenden Spannung aus Originalit{\"a}t und Effektivit{\"a}t, die der Standarddefinition der Kreativit{\"a}t zugrunde liegt. Es lassen sich auf Basis des Teamklimas und -kontextes Spannungsfelder hinsichtlich Konformit{\"a}t, Konsens und Koh{\"a}sion identifizieren. Mit Bezug zur Konformit{\"a}t m{\"u}ssen Teams ein positives Spannungsfeld aus der Unterst{\"u}tzung f{\"u}r Innovation und Aufgabenorientierung erreichen, um gleichzeitig Experimentierfreude zu f{\"o}rdern und hohe Qualit{\"a}tsanspr{\"u}che zu erzielen. Konsens entsteht im Spannungsfeld aus konstruktivem Konflikt und partizipatorischer Entscheidungsfindung. Bei der Koh{\"a}sion besteht eine Spannung zwischen der Teamidentit{\"a}t (Geborgenheit) und den individuellen Identit{\"a}ten der Teammitglieder (Diversit{\"a}t). Der Beitrag beschreibt, wie diese drei Spannungsfelder zusammenarbeiten, wenn außergew{\"o}hnliche Kreativit{\"a}t in Teams entsteht.}, subject = {Teamwork}, language = {de} } @article{BaierNeef2019, author = {Baier, Andr{\´e} and Neef, Matthias}, title = {Studierende lehren und lernen sozial-{\"o}kologische Verantwortung}, series = {Die Neue Hochschule}, volume = {60}, journal = {Die Neue Hochschule}, number = {5}, organization = {Hochschullehrerbund - Bundesvereinigung - e.V. (hlb)}, pages = {8 -- 11}, year = {2019}, language = {de} } @article{LehmannWittpahlZakouretal.2019, author = {Lehmann, Matthias and Wittpahl, Christian and Zakour, Hatem Ben and Braun, Alexander}, title = {Resolution and accuracy of nonlinear regression of point spread function with artificial neural networks}, series = {Optical Engineering}, volume = {58}, journal = {Optical Engineering}, number = {4}, publisher = {SPIE}, issn = {0091-3286}, doi = {10.1117/1.oe.58.4.045101}, pages = {045101}, year = {2019}, abstract = {We had already demonstrated a numerical model for the point spread function (PSF) of an optical system that can efficiently model both the experimental measurements and the lens design simulations of the PSF. The novelty lies in the portability and the parameterization of this model, which allow for completely new ways to validate optical systems, which is especially interesting not only for mass production optics such as in the automotive industry but also for ophthalmology. The numerical basis for this model is a nonlinear regression of the PSF with an artificial neural network (ANN). After briefly describing both the principle and the applications of the model, we then discuss two optically important aspects: the spatial resolution and the accuracy of the model. Using mean squared error (MSE) as a metric, we vary the topology of the neural network, both in the number of neurons and in the number of hidden layers. Measurement and simulation of a PSF can have a much higher spatial resolution than the typical pixel size used in current camera sensors. We discuss the influence this has on the topology of the ANN. The relative accuracy of the averaged pixel MSE is below 10  -  4, thus giving confidence that the regression does indeed model the measurement data with good accuracy. This article is only the starting point, and we propose several research avenues for future work.}, language = {en} } @article{LehmannWittpahlZakouretal.2019, author = {Lehmann, Matthias and Wittpahl, Christian and Zakour, Hatem Ben and Braun, Alexander}, title = {Modeling realistic optical aberrations to reuse existing drive scene recordings for autonomous driving validation}, series = {Journal of Electronic Imaging}, volume = {28}, journal = {Journal of Electronic Imaging}, number = {1}, publisher = {SPIE}, issn = {1560-229X}, doi = {10.1117/1.JEI.28.1.013005}, pages = {013005}, year = {2019}, abstract = {Training autonomous vehicles requires lots of driving sequences in all situations. Collecting and labeling these drive scenes is a very time-consuming and expensive process. Currently, it is not possible to reuse these drive scenes with different optical properties, because there exists no numerically efficient model for the transfer function of the optical system. We present a numerical model for the point spread function (PSF) of an optical system that can efficiently model both experimental measurements and lens design simulations of the PSF. The numerical basis for this model is a nonlinear regression of the PSF with an artificial neural network. The novelty lies in the portability and the parameterization of this model. We present a lens measurement series, yielding a numerical function for the PSF that depends only on the parameters defocus, field, and azimuth. By convolving existing images and videos with this PSF, we generate images as if seen through the measured lens. The methodology applies to any optical scenario, but we focus on the context of autonomous driving, where the quality of the detection algorithms depends directly on the optical quality of the used camera system. With this model, it is possible to reuse existing recordings, with the potential to avoid millions of test drive miles. The parameterization of the optical model allows for a method to validate the functional and safety limits of camera-based advanced driver assistance systems based on the real, measured lens actually used in the product.}, language = {en} } @article{KretschmarNiemannDeckert2019, author = {Kretschmar, Dominik and Niemann, J{\"o}rg and Deckert, Carsten}, title = {Digitalisierungsindex zur prozessnahen Analyse mittelst{\"a}ndischer Unternehmen}, series = {ZWF Zeitschrift f{\"u}r wirtschaftlichen Fabrikbetrieb}, volume = {114}, journal = {ZWF Zeitschrift f{\"u}r wirtschaftlichen Fabrikbetrieb}, number = {4}, publisher = {Hanser}, issn = {0947-0085}, doi = {10.3139/104.112064}, pages = {213 -- 218}, year = {2019}, language = {de} } @article{DeckertGoers2019, author = {Deckert, Carsten and G{\"o}rs, Nadine}, title = {Transport carbon footprint in the german courier, express and parcel industry (CEP industry)}, series = {Sustainability Management Forum | NachhaltigkeitsManagementForum}, volume = {27}, journal = {Sustainability Management Forum | NachhaltigkeitsManagementForum}, number = {1}, publisher = {Springer}, doi = {10.1007/s00550-018-0471-1}, pages = {23 -- 30}, year = {2019}, language = {en} }