Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 31 (12 UL)
Full Text
Peer Reviewed
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: 27 (3 UL)
Full Text
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: 32 (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: 17 (3 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: 11 (0 UL)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 54 (5 UL)
Full Text
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 ▲]

Detailed reference viewed: 23 (10 UL)
Full Text
Peer Reviewed
See detailCommunautés de vie et fiscalité individuelle au Grand-Duché de Luxembourg
Chaouche, Fatima UL

in Revue européenne et internationale de droit fiscal (2018)

Detailed reference viewed: 25 (6 UL)
Peer Reviewed
See detailIdentity of women in intercultural intimate relationships
Aleksic, Gabrijela UL; Natalie, Buendgen

in Aleksic, Gabrijela (Ed.) Experiencing Culture in Intercultural Intimate Relationships (2018)

Due to the increasing fluctuation between countries and the ongoing emergence of intercultural intimate relationships, the purpose of our study was to investigate how cultural transition affects the ... [more ▼]

Due to the increasing fluctuation between countries and the ongoing emergence of intercultural intimate relationships, the purpose of our study was to investigate how cultural transition affects the identity of women, who migrated out of love to settle permanently with their culturally diverse partner in Germany. Semi-structured interviews were conducted and analyzed by using qualitative content analysis. The sample consists of five women originally from Ireland, Peru, Poland and the United States, who all married a German and have lived in Germany between 8 and 50 years. The results show that cultural transition can affect identity in both positive and negative ways, which supports the perception of bicultural identity being at once both a blessing and a burden. [less ▲]

Detailed reference viewed: 21 (3 UL)
Full Text
Peer Reviewed
See detailEnforcing the European Semester: the politics of asymmetric information in the excessive deficit and macroeconomic imbalance procedures
Howarth, David UL; Savage, James

in Journal of European Public Policy (2018), 25(2), 193-211

The European Semester is an information-driven surveillance system that relies upon budgetary and economic statistics collected from the European Union’s member states and analyzed by the European ... [more ▼]

The European Semester is an information-driven surveillance system that relies upon budgetary and economic statistics collected from the European Union’s member states and analyzed by the European Commission. This is true for both the Excessive Deficit Procedure (EDP) and the Macroeconomic Imbalance Procedure (MIP). This article employs Principal–Agent theory to analyze the politics of asymmetric information in the EDP and MIP. The study explores how the statistical requirements of the Six-Pack have been enforced by the Commission and the Economic and Financial Affairs Council to strengthen the EDP, even as the statistical integrity of the MIP received less protection. The article examines how the misrepresentation of statistics by Spain’s Autonomous Community of Valencia provoked the first financial sanction in the history of Economic and Monetary Union, as well as the Commission’s unsuccessful efforts to strengthen the reliability of MIP statistics. [less ▲]

Detailed reference viewed: 25 (0 UL)
Full Text
Peer Reviewed
See detailThe ECOWAS Court of Justice as an Investment Tribunal
Happold, Matthew UL; Radović, Relja UL

in The Journal of World Investment & Trade (2018), 19(1), 1-23

This article considers the extent to which foreign investors in Member States of the Economic Community of West African States (ECOWAS) might be able to use the ECOWAS Court of Justice to protect their ... [more ▼]

This article considers the extent to which foreign investors in Member States of the Economic Community of West African States (ECOWAS) might be able to use the ECOWAS Court of Justice to protect their investments against actions of their host States. It does so taking into account the ECOWAS Supplementary Act on Investments and the jurisprudence of the Court of Justice on, in particular, the extent of its substantive jurisdiction. Although it is not suggested that the Court of Justice would be better forum than an international arbitral tribunal, it is argued that it has considerable advantages over national courts. [less ▲]

Detailed reference viewed: 38 (2 UL)
Full Text
See detailGrundkurs Theorien der Sozialen Arbeit
Sandermann, Philipp; Neumann, Sascha UL

Book published by utb (2018)

Diese kritisch-systematische Einführung gibt Studierenden einen Überblick zum Themenfeld Theorien der Sozialen Arbeit. Die Autoren ermuntern zu einer differenzierten und analytischen Auseinandersetzung ... [more ▼]

Diese kritisch-systematische Einführung gibt Studierenden einen Überblick zum Themenfeld Theorien der Sozialen Arbeit. Die Autoren ermuntern zu einer differenzierten und analytischen Auseinandersetzung mit dem aktuellen Theoriediskurs, bei dem neben dem Aussagegehalt der Theorien der Sozialen Arbeit vor allem ihre Plausibilisierungsstrategien sowie deren Grenzen im Mittelpunkt stehen (Verlagsinfo). [less ▲]

Detailed reference viewed: 15 (1 UL)
See detailSelbstakzeptanz. Die Rational-Emotive Verhaltenstherapie nach Albert Ellis
Hoellen, Burkhard; Böhmer, Matthias UL

Book published by Klett-Cotta (2018)

Detailed reference viewed: 20 (1 UL)
See detailUrban energy transitions through innovations in green building
Affolderbach, Julia; JUNG ép. PRELLER, Bérénice UL; Schulz, Christian UL

in König, Ariane (Ed.) Sustainability science (2018)

Detailed reference viewed: 31 (2 UL)
Full Text
Peer Reviewed
See detailFinite Size Effects in Highly Scaled Ruthenium Interconnects
Dutta, Shibesh; Moors, Kristof UL; Vandemaele, Michiel et al

in IEEE Electron Device Letters (2018)

Ru has been considered a candidate to replace Cu-based interconnects in VLSI circuits. Here, a methodology is proposed to predict the resistivity of (Ru) interconnects. First, the dependence of the Ru ... [more ▼]

Ru has been considered a candidate to replace Cu-based interconnects in VLSI circuits. Here, a methodology is proposed to predict the resistivity of (Ru) interconnects. First, the dependence of the Ru thin film resistivity on the film thickness is modeled by the semiclassical Mayadas-Shatzkes (MS) approach. The fitting parameters thus obtained are then used as input in a modified MS model for nanowires to calculate wire resistivities. Predicted experimental resistivities agreed within about 10%. The results further indicate that grain boundary scattering was the dominant scattering mechanism in scaled Ru interconnects. [less ▲]

Detailed reference viewed: 10 (0 UL)
Full Text
Peer Reviewed
See detailASPIC-END: Structured Argumentation with Explanations and Natural Deduction
Dauphin, Jérémie UL; Cramer, Marcos UL

in Theory and Applications of Formal Argumentation (2018)

We propose ASPIC-END, an adaptation of the structured argumentation framework ASPIC+ which can incorporate explanations and natural deduction style arguments. We discuss an instantiation of ASPIC-END that ... [more ▼]

We propose ASPIC-END, an adaptation of the structured argumentation framework ASPIC+ which can incorporate explanations and natural deduction style arguments. We discuss an instantiation of ASPIC-END that models argumentation about explanations of semantic paradoxes (e.g. the Liar paradox), and we show that ASPIC-END satisfies rationality postulates akin to those satisfied by ASPIC+. [less ▲]

Detailed reference viewed: 68 (8 UL)
Full Text
Peer Reviewed
See detailDevelopment of a test track for driverless cars: vehicle design, track configuration, and liability considerations
Szalay, Zsolt; Tettamanti, Tamás; Esztergár-Kiss, Domokos et al

in Periodica Polytechnica Transportation Engineering (2018), 46(1), 29-35

The Research Center for Autonomous Road Vehicles (RECAR) was founded in 2015 upon the initiative of the Faculty of Transportation Engineering and Vehicle Engineering of Budapest University of Technology ... [more ▼]

The Research Center for Autonomous Road Vehicles (RECAR) was founded in 2015 upon the initiative of the Faculty of Transportation Engineering and Vehicle Engineering of Budapest University of Technology and Economics. The research center is supported by industrial partners and other academic partners targeting research and educational purposes. In complement to this project, the construction of a new automotive test track is also under development especially for autonomous road vehicle testing serving as automotive proving ground in Zalaegerszeg, Hungary. Accordingly, an intensive research has been started in RECAR center in the field of autonomous vehicle technology. The paper’s goal is to share the main practical and methodological experiences with the scientific audience as well as the industrial sector. Based on the initial research actions we intend to enlighten the upcoming research challenges of driverless vehicles and automated intelligent transport system. Basically, three main topics are concerned. Firstly, the main issues concerning autonomous vehicle research are summarized. Secondly, the requirements for autonomous test track design are concluded. Thirdly, the legal questions that emerge with the appearance of driverless vehicles are investigated, especially concerning liability. [less ▲]

Detailed reference viewed: 14 (4 UL)
Full Text
Peer Reviewed
See detailProperty and the Cloud
Bartolini, Cesare UL; Santos, Cristiana; Ullrich, Carsten UL

in Computer Law Security Review (2018)

Data is a modern form of wealth in the digital world, and massive amounts of data circulate in cloud environments. While this enormously facilitates the sharing of information, both for personal and ... [more ▼]

Data is a modern form of wealth in the digital world, and massive amounts of data circulate in cloud environments. While this enormously facilitates the sharing of information, both for personal and professional purposes, it also introduces some critical problems concerning the ownership of the information. Data is an intangible good that is stored in large data warehouses, where the hardware architectures and software programs running the cloud services coexist with the data of many users. This context calls for a twofold protection: on one side, the cloud is made up of hardware and software that constitute the business assets of the service provider (property of the cloud); on the other side, there is a definite need to ensure that users retain control over their data (property in the cloud). The law grants protection to both sides under several perspectives, but the result is a complex mix of interwoven regimes, further complicated by the intrinsically international nature of cloud computing that clashes with the typical diversity of national laws. As the business model based on cloud computing grows, public bodies, and in particular the European Union, are striving to find solutions to properly regulate the future economy, either by introducing new laws, or by finding the best ways to apply existing principles. [less ▲]

Detailed reference viewed: 8 (1 UL)
See detailKinder in Deutschland 2018. 4. World Vision Kinderstudie
World Vision Deutschland e.V.; Andresen, Sabine; Neumann, Sascha UL et al

Book published by Beltz (2018)

Detailed reference viewed: 14 (2 UL)
Full Text
Peer Reviewed
See detailCognitive pitfalls in dealing with sustainability
Sonnleitner, Philipp UL

in König, Ariane (Ed.) Sustainability science: Key issues (2018)

Main summary points: • Environmental conditions in which human ancestors evolved, strongly shaped human thinking • Two complementary cognitive systems can be distinguished whose interplay causes ... [more ▼]

Main summary points: • Environmental conditions in which human ancestors evolved, strongly shaped human thinking • Two complementary cognitive systems can be distinguished whose interplay causes systematic errors, especially in situations including uncertainty or complexity • These cognitive pitfalls have tremendous consequences in the context of sustainability • Leveraging cognitive biases and knowledge about them by improving education and training is vital to address ecological problems [less ▲]

Detailed reference viewed: 59 (2 UL)