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See detailA Security Analysis, and a Fix, of a Code-Corrupted Honeywords System
Genç, Ziya Alper UL; Lenzini, Gabriele UL; Ryan, Peter UL et al

in Proceedings of the 4th International Conference on Information Systems Security and Privacy (2018)

In 2013 Juels and Rivest introduced the Honeywords System, a password-based authentication system designed to detect when a password file has been stolen. A Honeywords System stores passwords together ... [more ▼]

In 2013 Juels and Rivest introduced the Honeywords System, a password-based authentication system designed to detect when a password file has been stolen. A Honeywords System stores passwords together with indistinguishable decoy words so when an intruder steals the file, retrieves the words, and tries to log-in, he does not know which one is the password. By guessing one from the decoy words, he may not be lucky and reveal the leak. Juels and Rivest left a problem open: how to make the system secure even when the intruder corrupted the login server’s code. In this paper we study and solve the problem. However, since “code corruption” is a powerful attack, we first define rigorously the threat and set a few assumptions under which the problem is still solvable, before showing meaningful attacks against the original Honeywords System. Then we elicit a fundamental security requirement, implementing which, we are able to restore the honeywords System’s security despite a corrupted login service. We verify the new protocol’s security formally, using ProVerif for this task. We also implement the protocol and test its performance. Finally, at the light of our findings, we discuss whether it is still worth using a fixed honeywords-based system against such a powerful threat, or whether it is better, in order to be resilient against code corruption attacks, to design afresh a completely different password-based authentication solution. [less ▲]

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See detail“Don’t You Know I Own the Road?” The Link Between Narcissism and Aggressive Driving
Bushman, Brad J.; Steffgen, Georges UL; Kerwin, Thomas et al

in Transportation Research. Part F : Traffic Psychology and Behaviour (2018), 52

Aggressive drivers can make driving dangerous. Over 50% of traffic fatalities are caused by aggressive driving. Aggressive motorists make driving very dangerous. This research tests whether narcissists ... [more ▼]

Aggressive drivers can make driving dangerous. Over 50% of traffic fatalities are caused by aggressive driving. Aggressive motorists make driving very dangerous. This research tests whether narcissists are more aggressive drivers than other individuals. Narcissists think they are special people who deserve special treatment. When they don’t get the special treatment they think they deserve, narcissists often lash out at others in an aggressive manner. Narcissists might think they “own the road” and can drive anyway they want, and that other drivers should get out of their way. In the article, we conduct three studies to test the link between narcissism and aggressive driving. In Studies 1 (N=139) and 2 (N=100), Luxembourgish motorists completed a measure of narcissism and a self-report measure of aggressive driving. In Study 3 (N=60), American university students completed a measure of narcissism and then completed a driving simulation scenario that contained a number of frustrating elements. Several measures of aggressive driving and road rage were obtained. In all three studies, narcissism was positively related to aggressive driving. A meta-analysis found an average correlation of r=.35 across the three studies. This research replicates previous research linking narcissism to aggression, and extends it to a driving context. [less ▲]

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See detailEvaluation of a regional real-time precise positioning system based on GPS/BeiDou observations in Australia
Ding, Wenwu UL; Tan, Bingfeng; Chen, Yongchang et al

in Advances in Space Research (2018)

The performance of real-time (RT) precise positioning can be improved by utilizing observations from multiple Global Navigation Satellite Systems (GNSS) instead of one particular system. Since the end of ... [more ▼]

The performance of real-time (RT) precise positioning can be improved by utilizing observations from multiple Global Navigation Satellite Systems (GNSS) instead of one particular system. Since the end of 2012, BeiDou, independently established by China, began to provide operational services for users in the Asia-Pacific regions. In this study, an regional RT precise positioning system in Australia is developed to evaluate the performance of GPS/BeiDou observations in providing high precision positioning services for users. Fixing three hourly updated satellite orbits, RT correction messages are generated and broadcasted by processing RT observation/navigation data streams from AUSCORS at the server side. At the user side, RT PPP is realized by processing RT data streams and the RT correction messages received. RT clock offsets, for which the accuracy reached 0.07 and 0.25 ns for GPS and BeiDou, respectively, can be determined. Based on these corrections, an accuracy of 12.2, 30.0 and 45.6 cm in the North, East and Up directions was achieved for the BeiDou-only solution after 30 minutes while the GPS-only solution reached 5.1, 15.3 and 15.5 cm for the same components at the same time. A further improvement of 43.7, 36.9 and 45.0 percent in the three directions, respectively, was achieved for the combined GPS/BeiDou solution. After the initialization process, the North, East and Up positioning accuracies were 5.2, 8.1 and 17.8 cm, respectively, for the BeiDou-only solution, while 1.5, 3.0, and 4.7 cm for the GPS-only solution. However, we only noticed a 20.9% improvement in the East direction was obtained for the GPS/BeiDou solution, while no improvements in the other directions were detected. It is expected that such improvements may become bigger with the increasing accuracy of the BeiDou-only solution. [less ▲]

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See detailComparison of Several RANS Modelling for the Pavia TRIGA Mark II Research Reactor
Introini, Carolina; Cammi, Antonio; Lorenzi, Stefano et al

in Journal of Nuclear Engineering and Radiation Science (2018)

Aim of this work is the comparison of different turbulent models based on the Reynolds Averaged Navier-Stokes (RANS) equations in order to find out which model is the most suitable for the study of the ... [more ▼]

Aim of this work is the comparison of different turbulent models based on the Reynolds Averaged Navier-Stokes (RANS) equations in order to find out which model is the most suitable for the study of the channel thermal-hydraulics of the TRIGA Mark II reactor. Only the steady state behaviour (i.e. the full power stationary operational conditions) of the reactor has been considered. To this end, the RAS (Reynolds-Averaged Simulation) models available in the open source CFD software OpenFOAM have been applied to the most internal channel of the TRIGA and assessed against a Large Eddy Simulation (LES) model. The results of the latter approach, expressed in terms of axial velocity, turbulent viscosity, turbulent kinetic energy, and temperature have been compared with the results obtained by the RAS models available in OpenFOAM (k − ε, k − ω and Reynolds Stress Transport). Heat transfer is taken into account as well by means of the turbulent energy diffusivity parameter. The simulation results demonstrate how, amongst the RAS models, the k − ω SST is the one whose results are closer to the LES simulation. This model seems to be the best one for the treatment of turbulent flow within the TRIGA subchannel, offering a good compromise between accuracy and computational requirements. Since it is much less expensive than an LES model, it can be applied even to full core calculation, in order to obtain accurate results with less computational effort. [less ▲]

Detailed reference viewed: 19 (2 UL)
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See detailWord recognition and reading comprehension of preschool children in Serbia: A longitudinal study
Aleksic, Gabrijela UL; Tymms, Peter; Merrell, Christine et al

in Developmental Psychology (2018)

Detailed reference viewed: 39 (6 UL)
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See detailDroit d'Asile au Grand-Duché de Luxembourg - Guide pratique
Chaouche, Fatima UL; Gerkrath, Jörg UL; Silga, Janine UL et al

Book published by Pasicrisie Luxembourg (2018)

Detailed reference viewed: 17 (1 UL)
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See detailDeveloping speaking and pronunciation skills through storytelling on the app iTEO
Kirsch, Claudine UL

in Hood, Philip (Ed.) Teaching Languages Creatively (2018)

Detailed reference viewed: 17 (2 UL)
See detailWa(h)re Gefühle? Sozialpädagogische Emotionsarbeit im wohlfahrtsstaatlichen Kontext
Kommission Sozialpädagogik, ; Bauer, Petra; Dörr, Margret et al

Book published by BeltzJuventa (2018)

Detailed reference viewed: 16 (2 UL)
See detailBildung ohne Geländer – Gattungs- und bildungstheoretische Reflexionen in Wolfgang Herrndorfs Roman ›Tschick‹
Pavlik, Jennifer UL

in Matthias, Lorenz (Ed.) »Germanistenscheiß«. Beiträge zur Werkpolitik Wolfgang Herrndorfs. (2018)

Detailed reference viewed: 7 (0 UL)
See detailGrenze als überwindbares Phänomen in der Raumplanung?
Nienaber, Birte UL

in Heintel, Martin; Musil, Robert; Weixlbaumer, Norbert (Eds.) Grenzen (2018)

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See detailThe coping of bystanders with cyberbullying in an adolescent population
Steffgen, Georges UL; Pinto Costa, Andreia UL; Slee, Phillip T.

in Slee, Phillip T.; Skrzypiec, Grace; Cefai, Carmel (Eds.) Child and Adolescent Wellbeing and Violence Prevention in Schools (2018)

Cyberbullying is a serious social phenomenon that occurs in different settings. In line with the participant role approach (Salmivalli, 2010), different bystanders (e.g. assistants, reinforcers, defenders ... [more ▼]

Cyberbullying is a serious social phenomenon that occurs in different settings. In line with the participant role approach (Salmivalli, 2010), different bystanders (e.g. assistants, reinforcers, defenders, and outsiders), likewise cyberbullies, and cybervictims are involved in cyberbullying incidents. The current study explores how participants in cyberbullying incidents differ in coping behaviour. Students of German and Luxembourg secondary schools (n = 367) completed a questionnaire, amongst others, on participant roles and coping. Coping behavior was classified into six strategies: other-focused, self-focused, avoidance, relationships improvement, assertive responses, and technical responses (AUTHORS et al, 2012). These coping behaviors were mostly interrelated. Regression analysis showed that avoidance, self-focused strategies, and assertive responses predicted victimization. Additionally, defender behavior was predicted by reduced technical responses and enhanced other focused strategies. Hence, different actors in cyberbullying incidents differ systematically in coping behavior. The implications of the findings are of relevance for the development of efficient coping-based intervention programs against cyberbullying. In particular, avoidance, self- and other-focused strategies of actors in cyberbullying incidents have to be considered in intervention programs. [less ▲]

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See detailInstitutionalisierungen von Kindheit. Childhood Studies zwischen Soziologie und Erziehungswissenschaft
Betz, Tanja; Bollig, Sabine; Joos, Magdalena et al

Book published by Beltz Juventa (2018)

In der Frage nach den Institutionalisierungen von Kindheit kreuzen sich die Perspektiven von Kindheitssoziologie und Erziehungswissenschaft. Der Band nimmt dies zum Anlass, deren Zugänge und ... [more ▼]

In der Frage nach den Institutionalisierungen von Kindheit kreuzen sich die Perspektiven von Kindheitssoziologie und Erziehungswissenschaft. Der Band nimmt dies zum Anlass, deren Zugänge und Forschungserträge jenseits disziplinärer Demarkationslinien aufeinander zu beziehen und eine "Zwischenbilanz" der Entwicklung des Forschungsfeldes der childhood studies vorzunehmen. Dabei geht es sowohl um das Aufklärungspotential von aktuellen empirischen Studien und Theorieperspektiven als auch um die Reformulierungen, die Schlüsselkonzepte der childhood studies zwischenzeitlich erfahren haben. [less ▲]

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See detailVisuo-spatial abilities are key for young children’s verbal number skills
Cornu, Véronique UL; Schiltz, Christine UL; Martin, Romain UL et al

in Journal of Experimental Child Psychology (2018), 166C

Children’s development of verbal number skills (i.e, counting abilities and knowledge of the number names) presents a milestone in mathematical development. Different factors such as visuo-spatial and ... [more ▼]

Children’s development of verbal number skills (i.e, counting abilities and knowledge of the number names) presents a milestone in mathematical development. Different factors such as visuo-spatial and verbal abilities have been discussed to contribute to the development of these foundational skills. To understand the cognitive nature of verbal number skills in young children, the present study assessed the relation of preschoolers’ verbal and visuo-spatial abilities to their verbal number skills. In total, 141 children aged between five and six years participated in the present study. Verbal number skills were regressed on vocabulary, phonological awareness and visuo-spatial abilities, as well as verbal and visuo-spatial working memory in a structural equation model. Only visuo-spatial abilities emerged as a significant predictor of verbal number skills in the estimated model. Our results suggest that visuo-spatial abilities contribute to a larger extent to children’s verbal number skills than verbal abilities. From a theoretical point of view, these results suggest a visuo-spatial, rather than a verbal, grounding of verbal number skills. These results are potentially informative for the conception of early mathematics assessments and interventions. [less ▲]

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See detailComprendre la procédure civile québécoise
Menetrey, Séverine UL; Guillemard, Sylvette

Book published by Yvon Blais (2018)

Detailed reference viewed: 16 (0 UL)
See detailElectoral Violence in the Western Balkans. From Voting to Fighting and Back
Mochtak, Michal UL

Book published by Routledge (2018)

Detailed reference viewed: 8 (2 UL)
See detailDynamische Mathematik und computergestützte Tests: GeoGebra in TAO
Kreis, Yves UL; Dording, Carole; Keller, Ulrich UL et al

in Weinberger, Armin; Ladel, Silke; Knopf, Julia (Eds.) Digitalisierung und Bildung (2018)

In diesem Beitrag stellen wir die Integration der Dynamischen-Mathematik-Software GeoGebra in die technologiebasierte Assessment-Plattform TAO vor. Diese Kombination von Anwendungen schafft neue Lern-

Detailed reference viewed: 22 (2 UL)
See detailDrama of Multilingualism: Theory and Practice
Aleksic, Gabrijela UL

Book published by Information Age Publications (2018)

Why drama of multilingualism? Who cares about it? The book starts with a vignette on the (mis)understandings of the kindergarten situation around strawberries. By this vignette, I introduce different ... [more ▼]

Why drama of multilingualism? Who cares about it? The book starts with a vignette on the (mis)understandings of the kindergarten situation around strawberries. By this vignette, I introduce different levels of power relations between children, parents and teachers around language use. I then use Nancy Hornberger’s (1989) Continua of Biliteracy model through which I broaden this vignette and describe the structure of the book: why I chose to deal with this subject, what is my approach, why I conducted the interviews and discussion with the experts and their students in the US and how I plan to integrate this into something novel worth reading. Through the interaction with the experts on the topic I had during the interviews I focus on several topics: the necessity of defining and theorising in a specific social context, power relations, language policy, linguistic creativity and criticality, support for multilingual identity, gap in research. I conclude by underlining the notion of whether there is more or less drama in this field and who cares about it. [less ▲]

Detailed reference viewed: 21 (3 UL)
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See detailThe ability to read numbers: A universal measure?
Tymms, Peter; Aleksic, Gabrijela UL; Bartholo, Tiago et al

in AERA (2018)

This study tests the hypothesis that there is a single pathway for the order in which children learn to identify numbers. Although a prime facie case can be made, systematic variation might be expected ... [more ▼]

This study tests the hypothesis that there is a single pathway for the order in which children learn to identify numbers. Although a prime facie case can be made, systematic variation might be expected because of teaching, or language of instruction, or country of origin. This study concludes that such variations are minor and that the pathway that children follow when learning to identify numbers follows the same pattern across different groups. This finding is significant in furthering our knowledge of children’s early mathematics development; it suggests that there is a universal developmental scale from which the diverse aspects of mathematical development can be viewed. This lays the foundation for international comparisons of the mathematical development of young children. [less ▲]

Detailed reference viewed: 26 (2 UL)
See detailExperiencing Culture in Intimate Intercultural Relationships
Aleksic, Gabrijela UL

Book published by Information Age Publications (2018)

I introduce the book starting by my own personal experience of growing up in a mixed family and being myself in a mixed marriage. I describe the structure of the book by building up my own method: how I ... [more ▼]

I introduce the book starting by my own personal experience of growing up in a mixed family and being myself in a mixed marriage. I describe the structure of the book by building up my own method: how I chose this topic, who were the people I interviewed, how (interviews, stories, and objects) and why was the single-but-critical instances analysis important. I focus on the richness of the interaction I had with the interviewees. I underlie the phenomenological stories of struggles, trust and vulnerability. The chapters resolve around power relations, expressing affection, in-depth communication, child rearing, conflict resolution strategies, empathy, female identity, future planning, the role of humor, the biggest cultural and linguistic challenges and opportunities. The focus is on the phenomenon captured in single-but-critical instances in participants' stories. I conclude by describing what significance culture has in intimate intercultural relationships. [less ▲]

Detailed reference viewed: 32 (2 UL)