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See detailAvatar Sex Moderates Aggression in Violent Video Games, But Only for Women
Melzer, André UL; Schmidt, Alexander F.

Poster (2017, September 07)

Three studies tested findings reported by Yang, Huesmann, and Bushman (2014) that playing a male avatar in a violent video game leads to greater aggression than playing a female avatar in the same game ... [more ▼]

Three studies tested findings reported by Yang, Huesmann, and Bushman (2014) that playing a male avatar in a violent video game leads to greater aggression than playing a female avatar in the same game. The male avatar effect was confirmed in Study 1 (N=79) for post-game aggression: compared to playing a female character, participants who had played the male fighter in a violent mixed martials arts game chose more Hot Sauce for another participant who allegedly disliked spicy food. In contrast to Yang et al. (2014), however, the male avatar effect was qualified by participant sex, indicating that the effect was more strongly pronounced and only significant for female participants. A similar interaction effect was observed in Study 2 (N=76) and Study 3 (N=70) for in-game aggression: only female participants playing a male avatar showed a greater hit ratio in a mixed martials arts game (Study 2) or a greater number of attacks in a brawler game (Study 3) than their colleagues who played a female avatar. At this stage, the reason for this cross-gender effect is unclear. Given that games allow for behavior (i.e., aggression) independent of socially shared gender norms, we may speculate that for women, male avatars may provide the opportunity to “step out” of prevailing social norms regarding non-aggressive female behavior and adopt the role of the (hyper-)aggressive male. However, this hypothesis needs to be tested in future studies. All three studies additionally tested the mediating effect of male gender stereotype activation that was hypothesized by Yang et al. (2014). In addition to priming violent behavior, and in line with the General Aggression Model, the authors had speculated that playing the male avatar automatically activated male gender stereotypes (i.e., aggressive thoughts and behavior) which then caused aggressive behavior. In order to address this activation hypothesis, we designed an indirect cognitive measure of gender role identity using the Positive-Negative Sex-Role Inventory (PN-SRI: Berger & Krahé, 2013). After participants played the violent game, positive and negative aspects of masculinity and femininity were presented as word fragments in a five-minute response window in Study 1 and 2. Fragment completion rates served as indicators of cognitive activation of male stereotypes. In Study 3, participants used the intact PN-SRI gender attributes to rate the avatar after playing the game. However, both direct and indirect measures failed to corroborate the stereotype activation hypothesis in the present studies: word fragments related to male stereotypes were not completed more often than fragments related to female stereotypes (Study 1 and 2). Also, neither in-game aggression nor success in the game was associated with how masculine participants perceived their fighter (Study 3). At the present stage, thus, the mechanisms underlying the gender effect that participants respond differently when playing a male or female avatar in a violent video game remain unclear. [less ▲]

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See detailMultiscale Modelling of Damage and Fracture in Discrete Materials Using a Variational Quasicontinuum Method
Rokos, Ondrej; Peerlings, Ron; Beex, Lars UL et al

Scientific Conference (2017, September 05)

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See detailTommaso Padoa-Schioppa [biography]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

Tommaso Padoa-Schioppa (1940-2010) was an Italian banker, economist, and politician. He was one of the "architects of the euro" and helped to push forward the financial, monetary, and economic integration ... [more ▼]

Tommaso Padoa-Schioppa (1940-2010) was an Italian banker, economist, and politician. He was one of the "architects of the euro" and helped to push forward the financial, monetary, and economic integration of Europe. [less ▲]

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See detailScattering theory without injectivity radius assumptions and spectral stability for the Ricci flow
Güneysu, Batu; Thalmaier, Anton UL

E-print/Working paper (2017)

We prove a completely new integral criterion for the existence and completeness of the wave operators W_{\pm}(-\Delta_h,-\Delta_g, I_{g,h}) corresponding to the (unique self-adjoint realizations of) the ... [more ▼]

We prove a completely new integral criterion for the existence and completeness of the wave operators W_{\pm}(-\Delta_h,-\Delta_g, I_{g,h}) corresponding to the (unique self-adjoint realizations of) the Laplace-Beltrami operators -\Delta_j, j=g,h, that are induced by two quasi-isometric complete Riemannian metrics g and h on an open manifold M. In particular, this result provides a criterion for the absolutely continuous spectra of -\Delta_g and -\Delta_h to coincide. Our proof relies on estimates that are obtained using a probabilistic Bismut type formula for the gradient of a heat semigroup. Unlike all previous results, our integral criterion only requires some lower control on the Ricci curvatures and some upper control on the heat kernels, but no control at all on the injectivity radii. As a consequence, we obtain a stability result for the absolutely continuous spectrum under a Ricci flow. [less ▲]

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Peer Reviewed
See detailExposure to Sexualized Pictures Primes Occupational Stereotypes
Melzer, André UL; Ramsperger, Stephan

Scientific Conference (2017, September 05)

Gender stereotypes in advertisements, magazines, or videogames often appear in the form of sexualized portrayals of women characterized by inappropriately foregrounding female sexuality. Women are shown ... [more ▼]

Gender stereotypes in advertisements, magazines, or videogames often appear in the form of sexualized portrayals of women characterized by inappropriately foregrounding female sexuality. Women are shown with highly revealing clothing and engaging in seductive acts. Sexualization may serve as a motivator to adopt congruent gender-related stereotypes in the viewers and, thus, influence beliefs about women in the real world, including negative effects on self-efficacy of women (Behm-Morawitz & Mastro, 2009). In two studies, sexualization had similar adverse effects on participants’ spontaneous judgments of occupational stereotypes and job classification. In a field study (Study 1, N=128), sexualized female game characters were spontaneously associated with jobs of lower prestige (e.g., hairdresser). In contrast, non-sexualized portrayals were linked to jobs of higher status (i.e., physician, educator). This detrimental effect of sexualized portrayal on occupational status was replicated for depictions of male and female fashion models in an online survey (Study 2, N=459). Moreover, this effect was partially mediated by ratings of lower perceived competence for sexualized portrayals of both men and women. The findings of the present studies extend the multifaceted negative effects of sexualization on stereotyping by showing that the resulting spontaneous competence judgments may have detrimental job-related consequences. [less ▲]

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See detailOpening remarks: From Tablet to Tablet – workshop Jewish Studies & Digital Humanities, Hamburg, 4-6 September 2017
Zaagsma, Gerben UL

Presentation (2017, September 05)

This is the written version of opening remarks I gave at From Tablet to Tablet, a workshop on Jewish Studies and Digital Humanities supported by the Rothschild Foundation Hanadiv Europe in co-operation ... [more ▼]

This is the written version of opening remarks I gave at From Tablet to Tablet, a workshop on Jewish Studies and Digital Humanities supported by the Rothschild Foundation Hanadiv Europe in co-operation with the Institute for the History of the German Jews that took place in Hamburg between 4-6 September 2017. [less ▲]

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Peer Reviewed
See detailPartis politiques et religions aux Amériques et en Europe
Poirier, Philippe UL

in Portier, Philippe; Dieckhoff, Alain (Eds.) L'Enjeu mondial. Religion & politique (2017)

Dieu n'est pas mort. Il fait de la politique. Partout dans le monde, le religieux est de retour. Son ascendant se ressent à l'intérieur des États comme sur la scène internationale et ce, jusqu’en Occident ... [more ▼]

Dieu n'est pas mort. Il fait de la politique. Partout dans le monde, le religieux est de retour. Son ascendant se ressent à l'intérieur des États comme sur la scène internationale et ce, jusqu’en Occident, où il semblait promis à une irrémédiable occultation. Le constat, enthousiasmant pour les uns, dérangeant pour les autres, est sans appel : la modernité n’a pas induit la disparition sociale, ni surtout politique, du religieux. Trois phénomènes majeurs le traduisent : la polarisation des sociétés partagées entre effacement et réaffirmation des croyances, la politisation renouvelée des religions, la spiritualisation des politiques. Pour autant, il ne s’agit en aucun cas d’un retour aux temps anciens, quand toute vie sociale était configurée par le religieux. Fruit d’une coopération entre le Centre de recherches internationales de Sciences Po et le Groupe sociétés, religions, laïcités de l’École pratique des hautes études, cet ouvrage révèle toute la complexité d’un espace contemporain en tension perpétuelle entre sécularisation et réenchantement du monde. [less ▲]

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See detailIs Big Data Sufficient for a Reliable Detection of Non-Technical Losses?
Glauner, Patrick UL; Migliosi, Angelo UL; Meira, Jorge Augusto UL et al

in Proceedings of the 19th International Conference on Intelligent System Applications to Power Systems (ISAP 2017) (2017, September)

Non-technical losses (NTL) occur during the distribution of electricity in power grids and include, but are not limited to, electricity theft and faulty meters. In emerging countries, they may range up to ... [more ▼]

Non-technical losses (NTL) occur during the distribution of electricity in power grids and include, but are not limited to, electricity theft and faulty meters. In emerging countries, they may range up to 40% of the total electricity distributed. In order to detect NTLs, machine learning methods are used that learn irregular consumption patterns from customer data and inspection results. The Big Data paradigm followed in modern machine learning reflects the desire of deriving better conclusions from simply analyzing more data, without the necessity of looking at theory and models. However, the sample of inspected customers may be biased, i.e. it does not represent the population of all customers. As a consequence, machine learning models trained on these inspection results are biased as well and therefore lead to unreliable predictions of whether customers cause NTL or not. In machine learning, this issue is called covariate shift and has not been addressed in the literature on NTL detection yet. In this work, we present a novel framework for quantifying and visualizing covariate shift. We apply it to a commercial data set from Brazil that consists of 3.6M customers and 820K inspection results. We show that some features have a stronger covariate shift than others, making predictions less reliable. In particular, previous inspections were focused on certain neighborhoods or customer classes and that they were not sufficiently spread among the population of customers. This framework is about to be deployed in a commercial product for NTL detection. [less ▲]

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See detailLegal Markup Generation in the Large: An Experience Report
Sannier, Nicolas UL; Adedjouma, Morayo UL; Sabetzadeh, Mehrdad UL et al

in the 25th International Requirements Engineering Conference (RE'17), Lisbon, 4-8 September 2017 (2017, September)

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See detailCan health indicators and psychosocial characteristics predict attrition in youth with overweight and obesity seeking ambulatory treatment? Data from a retrospective longitudinal study in a paediatric clinic in Luxembourg.
Pit-Ten Cate, Ineke UL; Samouda, Hanen; Schierloh, Ulrike et al

in BMJ Open (2017), 7(9),

ABSTRACT Objectives: The current study aimed to identify factors that could predict attrition in youth starting ambulatory treatment to control or lose weight. Design: retrospective longitudinal study ... [more ▼]

ABSTRACT Objectives: The current study aimed to identify factors that could predict attrition in youth starting ambulatory treatment to control or lose weight. Design: retrospective longitudinal study Setting: paediatric clinic: ambulatory treatment program Patients and measures: A youth sample (N=191; 89 boys; age 7-17 years) completed measures of demographic characteristics, health and psychosocial traits before starting an ambulatory weight management program. Anthropometric and biological markers related to obesity were also obtained. Test of mean differences and regression analyses were used to investigate the relationship between these variables and attrition after one year. Results: Chi-square and t-test results showed both psychosocial and health indicators differentiated between participants who continued attending the treatment program and those that dropped out. More specifically, youth that dropped out of treatment were significantly older, had higher BMI-Z scores, higher levels of insulin, triglycerides and HOMA-IR, reported poorer health and more conduct problems, and were more dissatisfied with themselves and their bodies before starting treatment. Results of regression analyses revealed that weight status (anthropometric and biological markers), age and body dissatisfaction predict attrition (overall prediction success 73%; prediction success for continued attendance 90/91%; prediction success for dropout 42/44%). Conclusion: Attrition, but especially the continued attendance in treatment, can be successfully predicted by age, weight status and body dissatisfaction. For patients who present with one or more risk factors, careful consideration is needed to decide which (combination of) in- or outpatient program may facilitate prolonged engagement of the patient and hence may be most effective in establishing weight loss. [less ▲]

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See detailIntroduction to Detection of Non-Technical Losses using Data Analytics
Glauner, Patrick UL; Meira, Jorge Augusto UL; State, Radu UL et al

Scientific Conference (2017, September)

Electricity losses are a frequently appearing problem in power grids. Non-technical losses (NTL) appear during distribution and include, but are not limited to, the following causes: Meter tampering in ... [more ▼]

Electricity losses are a frequently appearing problem in power grids. Non-technical losses (NTL) appear during distribution and include, but are not limited to, the following causes: Meter tampering in order to record lower consumptions, bypassing meters by rigging lines from the power source, arranged false meter readings by bribing meter readers, faulty or broken meters, un-metered supply, technical and human errors in meter readings, data processing and billing. NTLs are also reported to range up to 40% of the total electricity distributed in countries such as Brazil, India, Malaysia or Lebanon. This is an introductory level course to discuss how to predict if a customer causes a NTL. In the last years, employing data analytics methods such as data mining and machine learning have evolved as the primary direction to solve this problem. This course will compare and contrast different approaches reported in the literature. Practical case studies on real data sets will be included. Therefore, attendees will not only understand, but rather experience the challenges of NTL detection and learn how these challenges could be solved in the coming years. [less ▲]

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See detailDie steuerrechtlichen Herausforderungen der digitalen Wirtschaft - Was passiert in Europa?
Sinnig, Julia UL

in Taeger, Juergen (Ed.) Tagungsband Herbstakademie 2017: Recht 4.0 - Innovationen aus den rechtswissenschaftlichen Laboren (2017, September)

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See detailThe Governance of Post-Secondary Education Systems in British Columbia and Ontario: Path Dependence and Provincial Policy
Harmsen, Robert UL; Tupper, Allan

in Canadian Public Administration (2017), 60(3), 349-368

Provincial governments retain an essentially unrestricted jurisdictional autonomy as regards the structuring and coordination of post-secondary education (PSE) systems. It is at the provincial level that ... [more ▼]

Provincial governments retain an essentially unrestricted jurisdictional autonomy as regards the structuring and coordination of post-secondary education (PSE) systems. It is at the provincial level that crucial balances must be struck between the competing demands placed on costly PSE systems. This article develops a comparative historical analysis of the British Columbia and Ontario cases in this relatively neglected area of provincial public management. Strong path-dependent logics are identified in both cases, anchored in interconnected networks of institutional and local interests. Current developments in both provinces are assessed against the background of these longer-term historical patterns and in relation to wider international trends. [less ▲]

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See detailSprachbiographien und ihre Bedeutung in multilingualen Kontexten. Eine Fallstudie aus Luxemburg
Kirsch, Claudine UL; Cicero Catanese, Giovanni

in Zeitschrift für Grundschulforschung, Bildung im Elementar- und Primarbereich (2017), 10(2), 35-48

Sprachbiographien dokumentieren und kontextualisieren Spracherfahrungen, helfen dem Lernenden, die eigene Sprachentwicklung und das Sprachverhalten zu verstehen, und ermöglichen Pädagogen, passende ... [more ▼]

Sprachbiographien dokumentieren und kontextualisieren Spracherfahrungen, helfen dem Lernenden, die eigene Sprachentwicklung und das Sprachverhalten zu verstehen, und ermöglichen Pädagogen, passende Sprachangebote zu machen. Das Fallbeispiel eines mehrsprachigen Kindes in Luxemburg gibt einen Einblick in und Anstoß für sprachbiographische Forschung und Praxis. Die Ergebnisse der longitudinalen Studie illustrieren, erstens, Daniels offene Haltung gegenüber Sprachen und Spracherfahrungen, seinen dynamischen Sprachgebrauch und seine sich entwickelnde Fähigkeit zur Reflexion und, zweitens, den Einfluss der Eltern und Schule. [less ▲]

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See detailA Model-Driven Approach to Trace Checking of Pattern-based Temporal Properties
Dou, Wei; Bianculli, Domenico UL; Briand, Lionel UL

in Proceedings of the ACM/IEEE 20th International Conference on Model Driven Engineering Languages and Systems (MODELS 2017 ) (2017, September)

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See detailComparing Broad-Phase Interaction Detection Algorithms for Multiphysics DEM Applications
Rousset, Alban UL; Mainassara Chekaraou, Abdoul Wahid UL; Liao, Yu-Chung UL et al

Scientific Conference (2017, September)

Collision detection is an ongoing source of research and optimization in many fields including video-games and numerical simulations [6, 7, 8]. The goal of collision detection is to report a geometric ... [more ▼]

Collision detection is an ongoing source of research and optimization in many fields including video-games and numerical simulations [6, 7, 8]. The goal of collision detection is to report a geometric contact when it is about to occur or has actually occurred. Unfortunately, detailed and exact collision detection for large amounts of objects represent an immense amount of computations, naivly n 2 operation with n being the number of objects [9]. To avoid and reduce these expensive computations, the collision detection is decomposed in two phases as it shown on Figure 1: the Broad-Phase and the Narrow-Phase. In this paper, we focus on Broad-Phase algorithm in a large dynamic three-dimensional environment. We studied two kinds of Broad-Phase algorithms: spatial partitioning and spatial sorting. Spatial partitioning techniques op- erate by dividing space into a number of regions that can be quickly tested against each object. Two types of spatial partitioning will be considered: grids and trees. The grid-based algorithms consist of a spatial partitioning processing by dividing space into regions and testing if objects overlap the same region of space. And this reduces the number of pairwise to test. The tree-based algorithms use a tree structure where each node spans a particular space area. This reduces the pairwise checking cost because only tree leaves are checked. The spatial sorting based algorithm consists of a sorted spatial ordering of objects. Axis-Aligned Bounding Boxes (AABBs) are projected onto x, y and z axes and put into sorted lists. By sorting projection onto axes, two objects collide if and only if they collide on the three axes. This axis sorting reduces the number of pairwise to tested by reducing the number of tests to perform to only pairs which collide on at least one axis. For this study, ten different Broad-Phase collision detection algorithms or framework have been considered. The Bullet [6], CGAL [10, 11] frameworks have been used. Concerning the implemented algorithms most of them come from papers or given implementation [less ▲]

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See detailStandards for duty of care? Debating intermediary liability from a sectoral perspective
Ullrich, Carsten UL

in Journal of Intellectual Property, Information Technology and Electronic Commerce Law (2017), 8(2),

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See detailJoanAudit: A Tool for Auditing Common Injection Vulnerabilities
Thome, Julian UL; Shar, Lwin Khin UL; Bianculli, Domenico UL et al

in 11th Joint Meeting of the European Software Engineering Conference and the ACM SIGSOFT Symposium on the Foundations of Software Engineering (2017, September)

JoanAudit is a static analysis tool to assist security auditors in auditing Web applications and Web services for common injection vulnerabilities during software development. It automatically identifies ... [more ▼]

JoanAudit is a static analysis tool to assist security auditors in auditing Web applications and Web services for common injection vulnerabilities during software development. It automatically identifies parts of the program code that are relevant for security and generates an HTML report to guide security auditors audit the source code in a scalable way. JoanAudit is configured with various security-sensitive input sources and sinks relevant to injection vulnerabilities and standard sanitization procedures that prevent these vulnerabilities. It can also automatically fix some cases of vulnerabilities in source code — cases where inputs are directly used in sinks without any form of sanitization — by using standard sanitization procedures. Our evaluation shows that by using JoanAudit, security auditors are required to inspect only 1% of the total code for auditing common injection vulnerabilities. The screen-cast demo is available at https://github.com/julianthome/joanaudit. [less ▲]

Detailed reference viewed: 92 (27 UL)