Results 4581-4600 of 7345.
Bookmark and Share    
Full Text
See detailMaschinen nach menschlichem Vorbild
Leyers, Pierre; Schommer, Christoph UL

Article for general public (2018)

Die Forschung im Bereich der künstlichen Intelligenz (KI) hat sich seit den Anfängen Mitte der 1950er-Jahre des vorigen Jahrhunderts erst schleppend entwickelt. Heutzutage schaffen Hochleitungsrechner ... [more ▼]

Die Forschung im Bereich der künstlichen Intelligenz (KI) hat sich seit den Anfängen Mitte der 1950er-Jahre des vorigen Jahrhunderts erst schleppend entwickelt. Heutzutage schaffen Hochleitungsrechner, die riesige Datenmengen blitzschnell verarbeiten, kombiniert mit künstlicher Intelligenz neuartige und spannende Perspektiven. Prof. Dr. Christoph Schommer beschäftigt sich an der Universität Luxemburg mit der Entwicklung von KI-Systemen, insbesondere im Bereich des maschinellen Lernens. KISysteme zeichnen sich dadurch aus, dass sie lernen und sich selbst und andere programmieren und weiterentwickeln können. Der Informatik-Experte ist überzeugt, dass die Menschen auch künftig die digitale Schlüsseltechnologie, die sie erschaffen, beherrschen können. [less ▲]

Detailed reference viewed: 46 (6 UL)
See detailDevelopment of Eurocode 4
Schäfer, Markus UL

Presentation (2018, August 31)

Detailed reference viewed: 41 (0 UL)
Full Text
See detailHumidity Measurement Analysis for Flow Simulations
Estupinan Donoso, Alvaro Antonio UL

Presentation (2018, August 30)

Detailed reference viewed: 27 (2 UL)
See detailSame same, but different? Unequal student pathways in German higher education
Haas, Christina UL

Presentation (2018, August 30)

Detailed reference viewed: 45 (2 UL)
See detailSelf-Assessment in Elementary School with a Tablet-Computer-Based Tool: A Chance for Fairer Educational Assessment?
Villanyi, Denise UL

Doctoral thesis (2018)

Student self-assessment (SSA) is beneficial for students’ learning and achievement through processes of self-regulation. Furthermore, SSA is a valuable feedback for the teachers on students’ perceptions ... [more ▼]

Student self-assessment (SSA) is beneficial for students’ learning and achievement through processes of self-regulation. Furthermore, SSA is a valuable feedback for the teachers on students’ perceptions of their competencies. SSA can complete teachers’ view on and judgment about the students’ competencies and it can help teachers to adapt teaching and learning activities to better meet the needs of the students. Knowing that teachers’ assessments can be biased regarding students’ ethnic or immigration background, students’ SAs might be an important complementary source of information that increases fairness in educational assessment. Despite its proven benefits, the implementation of self-assessment (SA) in elementary school classrooms is limited, most probably due to the skepticism towards learners’ SA accuracy at all ages, but even more so when students are younger. The objective of the present dissertation was to capture students’ SAs of key academic competencies with an innovative tool—a tablet-computer-based SA-tool—, and to make it visible to teachers by giving them feedback on their students’ SAs. The dissertation is based on three empirical studies. In the first study, we investigated, whether third- and fourth-graders have the ability to assess key academic competencies (mathematics, German reading comprehension) with acceptable accuracy, when provided with an innovative tablet-computer-based tool that was designed respecting the requirements that facilitate SA for that age group. The second study concentrated on the domain of mathematics. We investigated how mathematics self-efficacy, the construct measured with the tool, relates to other competence beliefs such as mathematics self-concept and general academic self-concept and covariates (standardized tests in mathematics, reading comprehension, listening, comprehension; general academic and mathematics interest; general academic and mathematics anxiety; and gender). In the third study, we investigated whether feedbacks on students’ SAs and achievement test results (from Luxembourg school monitoring) are valuable information for teachers that they would triangulate with their own assessments. We hypothesized that the information captured via SSA and achievement test would trigger critical reflection in teachers, and offer them feedback on the appropriateness of their assessments (unbiased versus biased treatment) and thus make educational assessment fairer. The findings of the three studies contribute to answer the questions of how SA can be implemented in the classroom (Grades 3 and 4) in a way that it becomes meaningful to students and teachers, and whether SSA in the classroom is a chance for fairer educational assessment. Based on the results of Studies 1 and 2, we conclude that with an appropriate SA-tool, displaying self-efficacy items on task level on tablet-computer, third- and fourth-graders were able to assess key academic competencies with acceptable accuracy and thus to give valuable information to the teachers. Based on the results of Study 3, we conclude that teachers were able to triangulate the information from students’ SAs with their own assessments and with external achievement test results. Indeed, SSA in the classroom can be a chance for fairer educational assessment. [less ▲]

Detailed reference viewed: 62 (21 UL)
See detailBemessung nach Eurocode 4 und Sonderaspekte
Schäfer, Markus UL

Presentation (2018, August 30)

https://www1.hochschule-trier.de/fileadmin/groups/11/bauingenieurwesen/News_Downloads/2018_Bauseminar/Flyer_zum_Trierer_Bauseminar.pdf

Detailed reference viewed: 39 (0 UL)
See detailAktuelle Entwicklungen der Eurocode Normen
Schäfer, Markus UL

Presentation (2018, August 30)

https://www1.hochschule-trier.de/fileadmin/groups/11/bauingenieurwesen/News_Downloads/2018_Bauseminar/Flyer_zum_Trierer_Bauseminar.pdf

Detailed reference viewed: 45 (0 UL)
See detailComparison of Eurocodes and the Chinese standards - Design basics and Design of Composite structure 
Zhang, Qingjie UL; Schäfer, Markus UL

Presentation (2018, August 30)

https://www1.hochschule-trier.de/fileadmin/groups/11/bauingenieurwesen/News_Downloads/2018_Bauseminar/Flyer_zum_Trierer_Bauseminar.pdf

Detailed reference viewed: 72 (0 UL)
Full Text
Peer Reviewed
See detailContested Claims for Social and Environmental Justice. Ambivalences between Mundane and Deliberate Consumption in Alternative Food Networks
Reckinger, Rachel UL

Scientific Conference (2018, August 30)

Recently, a number of resourceful community-driven initiatives for local food production and retail have arisen in Luxembourg, where low organic agricultural rates are paired with high consumer demands ... [more ▼]

Recently, a number of resourceful community-driven initiatives for local food production and retail have arisen in Luxembourg, where low organic agricultural rates are paired with high consumer demands for organic produce. The main impact that heterodox actors can have seems to be the creation of resourcefulness from innovative niches, not designed to be upscaled but spread by ubiquitous networking. The motivations of actors involved in such social movements, albeit diverse, tend to stem from a stance of care and ethical (self)government, often using community self-organisation-tools. Based on qualitative interviews and participant observation, we expand on four case studies of fruit and vegetable production as well as unpackaged and socially responsible food retail in Luxembourg. One has been established since the 1980s with over 200 employees, partly in social insertion measures, producing and importing organic fruit and vegetables. Since 2014, three significantly smaller initiatives with higher citizen involvement have emerged. These recent initiatives are more radical in their agro-ecological and/or permaculture practices, proposing a political enacting of circular economy precepts. Yet, daily practices stay embedded in social, cultural and economic constraints and in routines, which are built on tacit knowledge, collective learning and engrained practices; even though repetitive, they can account for both reproduction and innovation. By analysing ethical entrepreneurship and the governmentality at its core as well as ambivalences and paradoxes between mundane and deliberate forms of consumption, this paper touches on interrelations between food policies and the politics of contested claims for, and practices of, social and environmental justice. [less ▲]

Detailed reference viewed: 54 (3 UL)
Peer Reviewed
See detailBecoming agents of change: how early-years practitioners in Luxembourg transformed a monolingual environment into a multilingual one
Kirsch, Claudine UL

Scientific Conference (2018, August 30)

This case-study examines the personal and professional experiences of two early-years practitioners in a preschool in Luxembourg, the ways in which professional development made them reflect on their ... [more ▼]

This case-study examines the personal and professional experiences of two early-years practitioners in a preschool in Luxembourg, the ways in which professional development made them reflect on their beliefs and practices, and, finally, the emerging multilingual practices. New laws about language education were passed in 2017 to take account of the diverse population (Kirsch forthcoming). The new policies move away from a previous focus on Luxembourgish towards multilingual education. Educators must develop skills in Luxembourgish, familiarise children with French and value their home languages. Such governmental policies are not transmitted directly into practices because policy-makers, educators and children engage in the process of policy-making, thereby interpreting them in the light of their beliefs, experiences, practices, and the context (Johnson 2013, Ricento and Hornberger 1996). Examples in the literature testify to the teachers’ agency (Palviainen and Mard-Miettinen 2015, Young and Mary 2016). Agency is not a personal characteristic but something people do. It is shaped by past experiences, future orientations, and current practices (Biesta et al. 2015, Priestley et al. 2013). The study draws on qualitative and quantitative methods (observations, video-recordings, interviews, a questionnaire). It abides to the ethical principles of the University of Luxembourg. The findings show that the practitioners were agents of change: they transformed the monolingual-oriented practices into multilingual ones. The professional development helped them understand perspectives of dynamic multilingualism (García 2017) and use languages strategically (Palviainen and Mard-Miettinen 2015). [less ▲]

Detailed reference viewed: 82 (2 UL)
Full Text
See detailThe Regulation of Space Resources Activities Between National and International Law
Salmeri, Antonino UL

Book published by Leiden University (2018)

Detailed reference viewed: 45 (0 UL)
Full Text
Peer Reviewed
See detailUsing social media to disseminate primary care research
Lygidakis, Charilaos UL; Gomez Bravo, Raquel UL

in Goodyear-Smith, Felicity; Mash, Robert (Eds.) How To Do Primary Care Research (2018)

Social media are a powerful means of communication among health-care professionals, patients and the public. Their use has been increasing steadily globally, transforming the way that people exchange ... [more ▼]

Social media are a powerful means of communication among health-care professionals, patients and the public. Their use has been increasing steadily globally, transforming the way that people exchange information, interact and collaborate. Physicians are using more and more social networks to connect with broader audiences, communicate with their patients and their colleagues and build a network of trustworthy peers. Researchers are also leveraging social media, capitalising on the velocity with which the messages can spread and the ability to disseminate their messages to the general public in addition to research communities, thus attracting more attention and increasing the influence and impact of their work. [less ▲]

Detailed reference viewed: 77 (13 UL)
Full Text
Peer Reviewed
See detailConducting primary care research using social media
Lygidakis, Charilaos UL; Neves, Ana Luísa; Laranjo, Liliana et al

in Goodyear-Smith, Felicity; Mash, Robert (Eds.) How To Do Primary Care Research (2018)

Social media offers great potential in primary care research. Online platforms can be used to conduct experimental studies, facilitating the recruitment and retention of participants, as well as the ... [more ▼]

Social media offers great potential in primary care research. Online platforms can be used to conduct experimental studies, facilitating the recruitment and retention of participants, as well as the delivery of the intervention. As patients are increasingly able to use information technology to help make informed decisions about their health care, reports show that the use of social media for health-information seeking is not limited to the younger demographics anymore. Notably, patients seem to be willing to share their health data in communities of peers, such as PatientsLikeMe, and actively engage with researchers. Additionally, publicly available social media data can be used for secondary analysis purposes, potentially contributing to the monitoring of health topics and disease surveillance. Finally, social media tools can be used to streamline the management of research projects and facilitate team collaboration. [less ▲]

Detailed reference viewed: 114 (5 UL)
See detailDigital picture archives in historical research and the visual history of education
Zaagsma, Gerben UL; Wieneke, Lars UL

Presentation (2018, August 28)

This proposal will discuss the use of digital picture archives and associated tools in historical research from the perspective of digital history with a focus on resources for the history of education ... [more ▼]

This proposal will discuss the use of digital picture archives and associated tools in historical research from the perspective of digital history with a focus on resources for the history of education. Our starting point will be threefold: • digital picture archives need to be seen as part of a wide range of digital resources that are currently available for historical research; while certain methodological, epistemological and technical questions are specific for digital picture archives, many pertain to digital resources in general; • similarly: discussing the prerequisites for a picture archive on educational history implies, first, to address the broader question of what prerequisites should be considered for digital archives more generally; and addressing the question of whether or not such general prerequisites can be formulated at all given the wide range of research questions and use cases researchers bring to the table With this broader contextualisation in mind we will focus on the possibilities and limitations of digital picture archives for the history of education through a brief discussion of the following points: • what are the characteristics of digital picture archives; technical and otherwise, and within that context, digital archives for the history of education; can specific characteristics be observed with regard to the latter or not? • what layers of information are currently embedded in digital picture archives for the history of education (taking Gerhard Paul‘s differentiation as a starting point); how can we improve the design, annotation and classification of images through metadata etc, to build corpuses that meet researcher‘s requirements? [less ▲]

Detailed reference viewed: 46 (8 UL)
Full Text
See detailThe dual Bonahon-Schläfli formula
Mazzoli, Filippo UL

E-print/Working paper (2018)

Given a differentiable deformation of geometrically finite hyperbolic 3-manifolds (M_t)_t, the Bonahon-Schläfli formula expresses the derivative of the volume of the convex cores (CM_t)_t in terms of the ... [more ▼]

Given a differentiable deformation of geometrically finite hyperbolic 3-manifolds (M_t)_t, the Bonahon-Schläfli formula expresses the derivative of the volume of the convex cores (CM_t)_t in terms of the variation of the geometry of its boundary, as the classical Schläfli formula does for the volume of hyperbolic polyhedra. Here we study the analogous problem for the dual volume, a notion that arises from the polarity relation between the hyperbolic space H^3 and the de Sitter space dS^3. The corresponding dual Bonahon-Schläfli formula has been originally deduced from Bonahon's work by Krasnov and Schlenker. Here, making use of the differential Schläfli formula and the properties of the dual volume, we give a (almost) self-contained proof of the dual Bonahon-Schläfli formula, without making use of Bonahon's original result. [less ▲]

Detailed reference viewed: 76 (10 UL)
Full Text
See detailEngineering Smart Software Services for Intelligent Pervasive Systems
Sanchez Guinea, Alejandro UL

Doctoral thesis (2018)

Pervasive computing systems, envisioned as systems that blend with the physical environment to enhance the quality of life of its users, are rapidly becoming a not so distant reality. However, many ... [more ▼]

Pervasive computing systems, envisioned as systems that blend with the physical environment to enhance the quality of life of its users, are rapidly becoming a not so distant reality. However, many challenges must be addressed before realizing the goal of having such computing systems as part of our everyday life. One such challenge is related to the problem of how to develop in a systematic way the software that lies behind pervasive systems, operating them and allowing them to intelligently adapt both to users' changing needs and to variations in the environment. In spite of the important strides done in recent years concerning the engineering of software that places the actual, immediate needs and preferences of users in the center of attention, to the best of our knowledge no work has been devoted to the study of the engineering process for building software for pervasive systems. In this dissertation we focus on the engineering process to build smart software services for pervasive systems. Specifically, we first introduce as our first major contribution a model for the systematic construction of software for pervasive systems, which has been derived using analytical, evidence-based, and empirical methodologies. Then, on the basis of the proposed model, we investigate two essential mechanisms that provide support for the engineering of value-added software services for smart environments, namely the learning of users' daily routines and the continuous identification of users. For the case of learning users' daily routines, we propose what is our second main contribution: a novel approach that discovers periodic-frequent routines in event data from sensors and smart devices deployed at home. For the continuous identification of users we propose what is our third major contribution: a novel approach based on behavioral biometrics which is able to recognize identities without requiring any specific gesture, action, or activity from the users. The two approaches proposed have been extensively evaluated through studies in the lab, based on synthetic data, and in the wild, showing that they can be effectively applied to different scenarios and environments. In sum, the engineering model proposed in this dissertation is expected to serve as a basis to further the research and development efforts in key aspects that are necessary to build value-added smart software services that bring pervasive systems closer to the way they have been envisioned. Furthermore, the approaches proposed for learning users' daily routines and recognizing users' identities in smart environments are aimed at contributing to the investigation and development of the data analytics technology necessary for the smart adaptation and evolution of the software in pervasive systems to users' needs. [less ▲]

Detailed reference viewed: 135 (17 UL)
Full Text
Peer Reviewed
See detailMULTI-SCALE MODELLING OF SNOW MECHANICS
Kabore, Brice Wendlassida UL; Peters, Bernhard UL; Willibald, C. et al

in 41st Solid Mechanics Conference (2018, August 27)

Detailed reference viewed: 43 (8 UL)
Full Text
Peer Reviewed
See detailIncorporating activity duration and scheduling utility into equilibrium-based Dynamic Traffic Assignment
Cantelmo, Guido UL; Viti, Francesco UL

in Transportation Research. Part B, Methodological (2018)

This paper deals with the problem of jointly modelling activity scheduling and duration within a Dynamic Traffic Assignment (DTA) problem framework. Although the last decades witnessed an intense effort ... [more ▼]

This paper deals with the problem of jointly modelling activity scheduling and duration within a Dynamic Traffic Assignment (DTA) problem framework. Although the last decades witnessed an intense effort in developing utility-based departure time choice models, relatively little has been done for understanding how the different assumptions on the utility model affect the model outputs. This problem is the main focus of this paper, which evaluates the effect of explicitly incorporating activity scheduling and duration within a generic user equilibrium DTA formulation. While using utility functions to model the positive component of the utility is a quite common procedure, the object of this paper is to show that a generic utility-based framework behaves as trip-based, activity-based, tour-based, or schedule-based if specific assumptions are specified. By establishing a set of properties, we quantify the amount of utility lost due to traffic congestion and how this affects activity (re-)scheduling and duration decisions. This allows predicting the effect of using a different assumption on the evolution of the transport system – and more specifically the departure time choice model. Conclusions support the idea that, under specific conditions, complex user behaviour can be approximated through a simplified model, and that the ratio between utility at origin and destination can be used to identify systematic biases within an existing DTA model – such as anticipating the rush hour. We also propose a novel utility function suited for modelling different activities, which can be used for modelling activities with a different duration. The mathematical model used to evaluate the effect of scheduling and duration into the equilibrium-based Dynamic Traffic Assignment is a simple bottleneck model. While this model has been recently re-formulated in order to capture the interaction between morning/evening commute, this paper further generalizes it in order to account for all type of activities. [less ▲]

Detailed reference viewed: 72 (4 UL)
See detailLe grand légendier de l'abbaye Saint-Maximin de Trèves: Analyse codicologique et mise en contexte d'une collection hagiographique monumentale (XIIIe-XVIe siècles)
Dubuisson, Bastian UL

Bachelor/master dissertation (2018)

Le grand légendier latin de l’abbaye Saint-Maximin de Trèves constitue l’une des plus amples collections hagiographiques de son temps. Ponctuellement employée dans le cadre d’éditions critiques, elle ... [more ▼]

Le grand légendier latin de l’abbaye Saint-Maximin de Trèves constitue l’une des plus amples collections hagiographiques de son temps. Ponctuellement employée dans le cadre d’éditions critiques, elle n’avait encore jamais été interrogée pour elle-même. Sur la base d’une analyse codicologique détaillée des volumes subsistants, ce mémoire propose une mise en contexte de la collection et une appréciation de son évolution et de ses adaptations au fil de l’histoire de l’abbaye. La confrontation du légendier aux autres productions manuscrites de l’établissement met en évidence son appartenance à une vaste campagne d’enrichissement du fonds de livres dans le second quart du XIIIe siècle mais reflète également un projet trop ambitieux qui ne put être mené à terme et qui suscita maintes interventions au tournant des XVe-XVIe siècles dans le cadre d’entreprises bibliothéconomiques. Bien que présentant un caractère universel, le sanctoral se démarque par l’inclusion de textes récents témoignant de diverses influences tout en présentant une synthèse de l’histoire pluriséculaire de l’institution et de ses relations. [less ▲]

Detailed reference viewed: 20 (1 UL)