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See detailEnhancing Self-Assembly in Cellulose Nanocrystal Suspensions Using High-Permittivity Solvents
Bruckner, Johanna; Kuhnhold, Anja UL; Honorato Rios, Camila UL et al

in Langmuir (2016)

Helical liquid crystal self-assembly in suspensions of cellulose nanocrystals (CNCs), bioderived nanorods exhibiting excellent mechanical and optical properties, opens attractive routes to sustainable ... [more ▼]

Helical liquid crystal self-assembly in suspensions of cellulose nanocrystals (CNCs), bioderived nanorods exhibiting excellent mechanical and optical properties, opens attractive routes to sustainable production of advanced functional materials. For convenience, in most studies until now, the CNCs were suspended in water, leaving a knowledge gap concerning the influence of the solvent. Using a novel approach for aggregation-free solvent exchange in CNC suspensions, here we show that protic solvents with a high dielectric permittivity εr significantly speed up self-assembly (from days to hours) at high CNC mass fraction and reduce the concentration dependence of the helix period (variation reducing from more than 30 μm to less than 1 μm). Moreover, our computer simulations indicate that the degree of order at constant CNC content increases with increasing εr, leading to a shorter pitch and a reduced threshold for liquid crystallinity. In low-εr solvents, the onset of long-range orientational order is coupled to kinetic arrest, preventing the formation of a helical superstructure. Our results show that the choice of solvent is a powerful parameter for tuning the behavior of CNC suspensions, enhancing our ability to control the self-assembly and thereby harvesting valuable novel cellulose-based materials. [less ▲]

Detailed reference viewed: 199 (13 UL)
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See detailEnhancing the Design Process by Embedding HCI Research into Experience Triggers
Lallemand, Carine UL; Bongard-Blanchy, Kerstin; Ocnarescu, Ioana

Scientific Conference (2014, October)

Over the last decade, User Experience (UX) has become a core concept in the field of Human-Computer Interaction (HCI). Beyond the fact of understanding and assessing the User Experience derived from the ... [more ▼]

Over the last decade, User Experience (UX) has become a core concept in the field of Human-Computer Interaction (HCI). Beyond the fact of understanding and assessing the User Experience derived from the use of interactive systems, practitioners and researchers from a wide range of disciplines are now facing the challenges of designing for User Experience. Some authors have pinpointed the existence of a gap between the theoretical knowledge developed in HCI Research and the practical knowledge actually used by designers to create rich experiences with interactive artefacts. A special focus of this paper is to translate theoretical work into experiential objects (or situations) called “Experience Triggers” [1]. Through their materiality, these artefacts bring emotions and sensations to the design process and designers can immerge into and understand the theories on experience. As a consequence of this immersion, the final product designed by the team is assumed to be more experiential. Experience Triggers are introduced here as a new tool for science-based UX design. [less ▲]

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See detailEnhancing the Web's infrastructure: from caching to replication
Baentsch, Michael; Baum, Lothar; Molter, Georg et al

in IEEE Internet Computing (1997), 1(2), 18-27

Detailed reference viewed: 76 (1 UL)
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See detailEnhancing University Students’ Learning, Engagement and Satisfaction in a Blended Learning Environment: An Action Research Study
Reuter, Robert UL; Busana, Gilbert UL

Scientific Conference (2013, September 27)

With the study reported here, two lecturers in Educational Technology tried to find out how they could improve their university students’ learning, their course engagement and their overall course ... [more ▼]

With the study reported here, two lecturers in Educational Technology tried to find out how they could improve their university students’ learning, their course engagement and their overall course satisfaction by systematically planning, observing and reflecting their teaching practices. For institutional reasons, they had been forced to switch from small-group seminars to large-group lectures in 2010-2011 and had since observed (1) relatively important declines in students’ knowledge and understanding (Bloom, 195 ), (2) low levels of student engagement during the lectures and (3) mixed levels of course satisfaction. During the winter semester 2012-2013 they thus wanted to explore various blended learning and interactive lecturing activities and to assess their effects. The aims of this research study are thus (1) to design and implement a meaningful and reasonable blended learning environment for students and (2) to roughly appraise its effects. Therefore an action-research process was established according emmis Mc aggart’s (1990) cyclical action-research model, where each cycle contains 4 steps: plan, action, observe and reflect. In addition, an intervention research process was also put in place to collect quantitative data about student learning, engagement and satisfaction. Planning, acting, observing and reflecting were done by the two lecturers. Oral presentations were prepared collaboratively; while one of the two lecturers delivered the presentation, the other one acted as the researcher, observing classroom activities, and implementing interactive learning activities; reflecting was done collaboratively after each lecture by writing down impressions. Several presentations were recorded (using a lecture recording software) and made available online for revision. Quantitative data were collected (1) from students’ actions in an online learning environment (moodle), comprising their viewing of various resources and their posting to assignments, and (2) from students’ scores at the final exam. Student satisfaction with the course had to be very generally assessed with the help of an optional anonymous course satisfaction survey set up by the university and could thus not be crossed with other types of data collected. Collected data are currently being analysed and will be presented at the conference. This research should help to better understand how university lecturing, often described as boring by students and leading to rather poor student performances, can be (1) enriched with the help of interactive and multimedia activities, as well as (2) extended by online learning activities. The objective is thus to contribute to the design of blended learning environments which (1) foster more sustainable learning in students, i.e. improving retention of knowledge and deepening understanding, and (2) lead to more responsible teaching, i.e. helping teachers to care about their students’ learning, engagement and satisfaction. [less ▲]

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See detailEnhancing User eXperience during Waiting Time in HCI: Contributions of Cognitive Psychology
Lallemand, Carine UL; Gronier, Guillaume

Scientific Conference (2012)

Despite technological progress, dailies Human-Computer Interactions (HCI) are still encompassing moments where the interaction between the user and the system is temporarily interrupted (file download ... [more ▼]

Despite technological progress, dailies Human-Computer Interactions (HCI) are still encompassing moments where the interaction between the user and the system is temporarily interrupted (file download, setup of a program, etc.). These waiting times are often sources of anxiety and irritation. In order to enhance the User eXperience (UX) during waiting time in HCI, this research based on cognitive models of time perception focuses on the impact of several variables on the satisfaction and waiting time perceived by a user. Variations in waiting time duration, cognitive workload and informational level of a feedback screen are therefore experimentally created to study their impact on satisfaction and waiting time perception. The results confirm the existence of a link between cognitive workload and waiting time perception and may provide valuable information for User Interface design. [less ▲]

Detailed reference viewed: 14 (0 UL)
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See detailEnjeux de coopération métropolitaine au sein de l’Aire Ligérienne. Synthèse et analyse des documents abordant l’aire ligérienne
Blondel, Cyril UL; Demazière, Christophe; Carrière, Jean-Paul et al

Report (2006)

Detailed reference viewed: 31 (0 UL)
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See detailEnjeux de la sécurité multimédia
Ebrahimi, Touradj; Leprévost, Franck UL; Warusfel, Bertrand

Book published by Hermès-Lavoisier (2006)

Detailed reference viewed: 45 (0 UL)
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See detailEnjeux du rapport au savoir dans la formation d'enseignats-stagiaires
Weber, Jean-Marie UL; Strohmer, Julia UL

in Travail et apprentissages (2017)

Detailed reference viewed: 37 (2 UL)
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See detailEnlarging the frame: Issues of inclusion and mental health in an ageing society
Ferring, Dieter UL

in Journal of Mental Health Research in Intellectual Disabilities (in press)

This contribution frames the notions of inclusion and mental health by describing trends in European societies at the social and economic level that will have direct consequences for a participative civil ... [more ▼]

This contribution frames the notions of inclusion and mental health by describing trends in European societies at the social and economic level that will have direct consequences for a participative civil society and social cohesion. Starting point is the observation that the world faces challenges at the start of the 21st century that are new and unprecedented in its history. The four global forces that break all the trends known so far in human history include urbanization, accelerating technological development, greater global connections, and population ageing. The authors first describe the scale of population ageing, as ageing populations characterize several developed economies. In a second step, they highlight some consequences of population ageing for social welfare and in a third part they elaborate on the notion of justice and inclusion in rapidly changing societies. [less ▲]

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See detailEnlarging the frame: Issues of Inclusion and mental health in an ageing society
Murdock, Elke UL; Ferring, Dieter UL

Scientific Conference (2017, September 22)

This contribution frames the notions of inclusion and mental health by describing trends in European societies at the social and economic level that will have direct consequences for a participative civil ... [more ▼]

This contribution frames the notions of inclusion and mental health by describing trends in European societies at the social and economic level that will have direct consequences for a participative civil society and social cohesion. Our starting point is the observation that the world faces challenges at the start of the 21st century that are new and unprecedented in its history. The four global forces that break all the trends known so far in human history include urbanisation, accelerating technological development, greater global connections, and population ageing (Dobbs, Manyika and Woetzel, 2016). We will first describe the scale of population ageing, as ageing populutions characterize several developed economies. In a second step, we will highlight some consequences of population ageing for social welfare and in a third part I will elaborate on the notion of justice and inclusion in rapidly changing societies. [less ▲]

Detailed reference viewed: 41 (9 UL)
See detailënnerwee... mee wouhin? 5es Assises de l'historiographie luxembourgeoise: Histoire religieuse. Bilan et perspectives (22-23 novembre 2013)
Binsfeld, Andrea UL; Pauly, Michel UL; Pettiau, Hérold UL

in Hemecht : Zeitschrift für Luxemburger Geschichte = Revue d'Histoire Luxembourgeoise (2014), 66(3/4), 269-271

Einführung in den Tagungsband

Detailed reference viewed: 94 (6 UL)
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See detailL'énonciation à la croisée des approches. Comment faire dialoguer la sémiotique et la linguistique?
Colas-Blaise, Marion UL

in Signata. Annales des Sémiotiques = Annals of Semiotics (2011)

Detailed reference viewed: 99 (0 UL)
See detailL'énonciation aujourd'hui. Un concept-clé en sciences du langage
Colas-Blaise, Marion UL; Perrin, Laurent; Tore, Gian Maria UL

Book published by Lambert-Lucas (2016)

Detailed reference viewed: 72 (2 UL)
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See detailL’énonciation comme concept clé des sciences du langage : Peut-on la définir ?
Tore, Gian Maria UL

in Colas, Marion; Perrin, Laurent; Tore, Gian Maria (Eds.) L’énonciation aujourd’hui. Un concept clé des sciences du langage (2016)

Detailed reference viewed: 48 (4 UL)
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See detail«L'énonciation comme parergon. A propos du récit-cadre contemporain»
Roelens, Nathalie UL

in Enonciation et Parti Pris (1992)

Detailed reference viewed: 31 (1 UL)