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See detailSelf-care Assistive Technologies: A systematic review of studies on efficiency and factors influencing their use
Abrilahij, Afsaneh UL; Boll, Thomas UL; Ferring, Dieter UL

Scientific Conference (2017, July 05)

A gradual decline in functional and mental capacity, as well as a growing risk of care dependency constitute major concerns of life in old age. These are expected to become more urgent in the future ... [more ▼]

A gradual decline in functional and mental capacity, as well as a growing risk of care dependency constitute major concerns of life in old age. These are expected to become more urgent in the future, because the old-age dependency ratio in the EU is projected to nearly double until 2060 due to demographic change. On the other side, there is a strong desire to maintain the autonomy of older people as long as possible. In reaction to this, there have been strong health and social policy recommendations across Europe to develop and promote the use of assistive technologies (ATs). Whereas systematic reviews already exist for several kinds of ATs, reviews about self-care ATs are still missing. Based on a systematic literature search in PsycINFO, MEDLINE, and Google Scholar databases 203 papers were identified of which 13 were included according to our selection criteria. The methodological quality of all the reviewed studies is evaluated. We reviewed findings on objective and subjective indicators of independent living as efficiency criteria as well as evidence about facilitating and inhibiting factors in the use of these technologies. Self-care ATs turned out to be efficient, with respect to care hours, independence level, and self-reported satisfaction. The actual use of these ATs was influenced by diverse personal, contextual, and device aspects. Lack of randomized control trial studies and the need for a further research about ATs in the diverse subdomains of self-care activities is revealed. Based on the findings of the current study, we generate recommendations for future research. [less ▲]

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See detailMagnetic neutron scattering on Nd-Fe-B magnets
Michels, Andreas UL

Scientific Conference (2017, July 02)

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See detailEnriching a Situation Awareness Framework for IoT with Knowledge Base and Reasoning Components
Kolbe, Niklas UL; Zaslavsky, Arkady; Kubler, Sylvain UL et al

in Modeling and Using Context (2017, July)

Theimportanceofsystem-levelcontext-andsituationaware- ness increases with the growth of the Internet of Things (IoT). This paper proposes an integrated approach to situation awareness by providing a ... [more ▼]

Theimportanceofsystem-levelcontext-andsituationaware- ness increases with the growth of the Internet of Things (IoT). This paper proposes an integrated approach to situation awareness by providing a semantically rich situation model together with reliable situation infer- ence based on Context Spaces Theory (CST) and Situation Theory (ST). The paper discusses benefits of integrating the proposed situation aware- ness framework with knowledge base and efficient reasoning techniques taking into account uncertainty and incomplete knowledge about situa- tions. The paper discusses advantages and impact of proposed context adaptation in dynamic IoT environments. Practical issues of two-way mapping between IoT messaging standards and CST are also discussed. [less ▲]

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See detailTowards Semantic Interoperability in an Open IoT Ecosystem for Connected Vehicle Services
Kolbe, Niklas UL; Kubler, Sylvain UL; Robert, Jérémy UL et al

in 2017 IEEE Global Internet of Things Summit (GIoTS) Proceedings (2017, July)

A present challenge in today’s Internet of Things (IoT) ecosystem is to enable interoperability across hetero- geneous systems and service providers. Restricted access to data sources and services limits ... [more ▼]

A present challenge in today’s Internet of Things (IoT) ecosystem is to enable interoperability across hetero- geneous systems and service providers. Restricted access to data sources and services limits the capabilities of a smart city to improve social, environmental and economic aspects. Interoperability in the IoT is concerned with both, messaging interfaces and semantic understanding of heterogeneous data. In this paper, the first building blocks of an emerging open IoT ecosystem developed at the EU level are presented. Se- mantic web technologies are applied to the existing messaging components to support and improve semantic interoperability. The approach is demonstrated with a proof-of-concept for connected vehicle services in a smart city setting. [less ▲]

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See detailAnalyzing Complex Data in Motion at Scale with Temporal Graphs
Hartmann, Thomas UL; Fouquet, François UL; Jimenez, Matthieu UL et al

in Proceedings of the 29th International Conference on Software Engineering and Knowledge Engineering (2017, July)

Modern analytics solutions succeed to understand and predict phenomenons in a large diversity of software systems, from social networks to Internet-of-Things platforms. This success challenges analytics ... [more ▼]

Modern analytics solutions succeed to understand and predict phenomenons in a large diversity of software systems, from social networks to Internet-of-Things platforms. This success challenges analytics algorithms to deal with more and more complex data, which can be structured as graphs and evolve over time. However, the underlying data storage systems that support large-scale data analytics, such as time-series or graph databases, fail to accommodate both dimensions, which limits the integration of more advanced analysis taking into account the history of complex graphs, for example. This paper therefore introduces a formal and practical definition of temporal graphs. Temporal graphs pro- vide a compact representation of time-evolving graphs that can be used to analyze complex data in motion. In particular, we demonstrate with our open-source implementation, named GREYCAT, that the performance of temporal graphs allows analytics solutions to deal with rapidly evolving large-scale graphs. [less ▲]

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See detailImpact of Tool Support in Patch Construction
Koyuncu, Anil UL; Bissyande, Tegawendé François D Assise UL; Kim, Dongsun UL et al

Scientific Conference (2017, July)

In this work, we investigate the practice of patch construction in the Linux kernel development, focusing on the differences between three patching processes: (1) patches crafted entirely manually to fix ... [more ▼]

In this work, we investigate the practice of patch construction in the Linux kernel development, focusing on the differences between three patching processes: (1) patches crafted entirely manually to fix bugs, (2) those that are derived from warnings of bug detection tools, and (3) those that are automatically generated based on fix patterns. With this study, we provide to the research community concrete insights on the practice of patching as well as how the development community is currently embracing research and commercial patching tools to improve productivity in repair. The result of our study shows that tool-supported patches are increasingly adopted by the developer community while manually-written patches are accepted more quickly. Patch application tools enable developers to remain committed to contributing patches to the code base. Our findings also include that, in actual development processes, patches generally implement several change operations spread over the code, even for patches fixing warnings by bug detection tools. Finally, this study has shown that there is an opportunity to directly leverage the output of bug detection tools to readily generate patches that are appropriate for fixing the problem, and that are consistent with manually-written patches. [less ▲]

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See detailHerausforderung partizipative Stadtplanung
Hesse, Markus UL

Article for general public (2017)

Als Hauptstadt übernimmt Luxemburg zahlreiche Funktionen an Stelle des Staates. Als Wohnort ist sie den quartierspezifischen Interessen ausgesetzt. Die sich daraus ergebende Spannung fordert nicht nur ... [more ▼]

Als Hauptstadt übernimmt Luxemburg zahlreiche Funktionen an Stelle des Staates. Als Wohnort ist sie den quartierspezifischen Interessen ausgesetzt. Die sich daraus ergebende Spannung fordert nicht nur Politik und Verwaltung heraus. Überlegungen zu den Bedingungen gelingender Partizipation von Bürgerschaft und Forschung. [less ▲]

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See detailÉtienne Anheim, Clément VI au travail. Lire, écrire, prêcher au xive siècle Paris, Publications de la Sorbonne, 2014, 408 p.
Vomacka, Eloïse UL

in Hemecht : Zeitschrift für Luxemburger Geschichte = Revue d'Histoire Luxembourgeoise (2017)

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See detailVon 'Flamma' zum 'Flamarium'. Zur Geschichte der Feuerbestattung im Großherzogtum Luxemburg, 1900-2015
Kolnberger, Thomas UL

in Hemecht : Zeitschrift für Luxemburger Geschichte = Revue d'Histoire Luxembourgeoise (2017), 69(Heft 2), 205-232

Luxembourg is a 'delayed nation', as far as cremation is concerned. It was in 1995 that the Grand Duchy opened its own cremation center, only ahead of Malta and Cyprus in the EU zone (Orthodoxe Greece is ... [more ▼]

Luxembourg is a 'delayed nation', as far as cremation is concerned. It was in 1995 that the Grand Duchy opened its own cremation center, only ahead of Malta and Cyprus in the EU zone (Orthodoxe Greece is a special case). While the discussion about the pros and cons of cremation is mirroring the general debate of the last hundred years since the introduction of this alternative form of burial and funeral technique in neighboring countries, especially in Geermany and France, the case study of Luxembourg also offers insights into the development of a small state shaped by its Catholic heritage. This mentaliy-argument is, however, only one side to be considered when investigating the history of cremation. Another decisive factor is the embedddedness of Luxembourg in a transnational context. [less ▲]

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See detailResistance measurement of dissimilar Al/Cu laser welds
Schmalen, Pascal Guy UL; Plapper, Peter UL

in Proceedings of LPM2017 - the 18th International Symposium on Laser Precision Microfabrication (2017)

Aluminum and Copper were joined using the laser-based braze-welding process. By avoiding the intermixture of both conductive materials, the formation of brittle intermetallic compounds is strongly reduced ... [more ▼]

Aluminum and Copper were joined using the laser-based braze-welding process. By avoiding the intermixture of both conductive materials, the formation of brittle intermetallic compounds is strongly reduced. This results in a tough, ductile connection with reduced electric resistance. This paper de-scribes a method, which is based on the 4-wire method, to measure the resistance of the weld seam. The arrangement of the conductive electrodes directly on top and bottom of the weld seam signifi-cantly increases the accuracy of the measured resistances, thus offers a direct estimation of the inter-metallic layer thickness. The electric measuring of the layer thickness is a non-destructive method, which assists in the reduction of the post-process effort (cross sections, pull tests, hardness measure-ments) and decreases the lead-time by reducing the time needed for the identification of suitable laser process parameters. [less ▲]

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See detailCatalysis beyond frontier molecular orbitals: Selectivity in partial hydrogenation of multi-unsaturated hydrocarbons on metal catalysts
Liu, Wei; Jiang, Yingda; Dostert, Karl-Heinz et al

in Science Advances (2017), 3

The mechanistic understanding and control over transformations of multi-unsaturated hydrocarbons on transition metal surfaces remains one of the major challenges of hydrogenation catalysis. To reveal the ... [more ▼]

The mechanistic understanding and control over transformations of multi-unsaturated hydrocarbons on transition metal surfaces remains one of the major challenges of hydrogenation catalysis. To reveal the microscopic origins of hydrogenation chemoselectivity, we performed a comprehensive theoretical investigation on the reactivity of two a,b-unsaturated carbonyls—isophorone and acrolein—on seven (111) metal surfaces: Pd, Pt, Rh, Ir, Cu, Ag, and Au. In doing so, we uncover a general mechanism that goes beyond the celebrated frontier molecular orbital theory, rationalizing the C--C bond activation in isophorone and acrolein as a result of significant surface-induced broadening of high-energy inner molecular orbitals. By extending our calculations to hydrogen-precovered surface and higher adsorbate surface coverage, we further confirm the validity of the “inner orbital broadening mechanism” under realistic catalytic conditions. The proposed mechanism is fully supported by our experimental reaction studies for isophorone and acrolein over Pd nanoparticles terminated with (111) facets. Although the position of the frontier molecular orbitals in these molecules, which are commonly considered to be responsible for chemical interactions, suggests preferential hydrogenation of the C--O double bond, experiments show that hydrogenation occurs at the C--C bond on Pd catalysts. The extent of broadening of inner molecular orbitals might be used as a guiding principle to predict the chemoselectivity for a wide class of catalytic reactions at metal surfaces. [less ▲]

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See detailElectronic charge rearrangement at metal/organic interfaces induced by weak van der Waals interactions
Ferri, Nicola; Ambrosetti, Alberto; Tkatchenko, Alexandre UL

in Physical Review Materials (2017), 1(1), 026003

Electronic charge rearrangements at interfaces between organic molecules and solid surfaces play a key role in a wide range of applications in catalysis, light-emitting diodes, single-molecule junctions ... [more ▼]

Electronic charge rearrangements at interfaces between organic molecules and solid surfaces play a key role in a wide range of applications in catalysis, light-emitting diodes, single-molecule junctions, molecular sensors and switches, and photovoltaics. It is common to utilize electrostatics and Pauli pushback to control the interface electronic properties, while the ubiquitous van der Waals (vdW) interactions are often considered to have a negligible direct contribution (beyond the obvious structural relaxation). Here, we apply a fully self-consistent Tkatchenko-Scheffler vdW density functional to demonstrate that the weak vdW interactions can induce sizable charge rearrangements at hybrid metal/organic systems (HMOS). The complex vdW correlation potential smears out the interfacial electronic density, thereby reducing the charge transfer in HMOS, changes the interface work functions by up to 0.2 eV, and increases the interface dipole moment by up to 0.3 Debye. Our results suggest that vdW interactions should be considered as an additional control parameter in the design of hybrid interfaces with the desired electronic properties. [less ▲]

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See detailInternetrecht
Schmitz, Sandra UL

Article for general public (2017)

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See detailThe Juridical Voice of Literature A Perspective on Literature’s Entanglement with Normativity
Becker, Katrin UL

in On_Culture: The Open Journal for the Study of Culture (2017), 3

Based on the logic of the Lacanian mirror paradigm, Pierre Legendre claims that every culture needs to create a metaphysical entity of Reference, for the sake of the legiti- macy and validity of its ... [more ▼]

Based on the logic of the Lacanian mirror paradigm, Pierre Legendre claims that every culture needs to create a metaphysical entity of Reference, for the sake of the legiti- macy and validity of its normative system. This entity disguises the abyss at the core of culture and legitimates it by staging itself as its origin. As such, the Reference not only authenticates individual and cultural subjectivity, but also becomes the founda- tion of law. Given that Legendre attributes a fundamental role to aesthetics in the cre- ation of this entity, my essay will identify the role of literature in this respect, arguing that, on the one hand, literary texts help confirming the readers’ attachment to a spe- cific order of Reference, i.e. of normativity and imagery. On the other hand, my essay claims that literature also has the capacity to reflect on the basis of cultural normativity and to unveil the contingency of normative truths. This results from what I call the cultural structures of testimony. Thus literature unleashes emancipatory forces with regard to a culture’s normative system. The essay tests this hypothesis by analysing E.T.A. Hoffmann’s The Sandman, a narrative that because of its play with the catego- ries of fiction and reality is particularly salient. [less ▲]

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See detailKatholische Kirchenmusik und Cäcilianismus in Luxemburg, Band 1. Briefwechsel Henri Oberhoffer / Franz Xaver Witt
Sagrillo, Damien UL

Book published by Margraf (2017)

Die vorliegende Veröffentlichung ist ein Ergebnis dreier Forschungsprojekte, darunter hauptsächlich „Musikgeschichte in Luxemburg“. Es wurde in den Jahren 2012- 2015 unter der Leitung von Damien Sagrillo ... [more ▼]

Die vorliegende Veröffentlichung ist ein Ergebnis dreier Forschungsprojekte, darunter hauptsächlich „Musikgeschichte in Luxemburg“. Es wurde in den Jahren 2012- 2015 unter der Leitung von Damien Sagrillo durchgeführt und von der Universität Luxemburg finanziert. Mit der staatlichen Unabhängigkeit Luxemburgs im 19. Jahrhundert und der Errichtung eines Bischofsitzes im Jahre 1870 hat sich, neben der weltlichen, zudem die Kirchenmusik in Luxemburg etabliert. Die zweite Hälfte des 19. Jahrhunderts ist geprägt durch die kirchenmusikalische Reformbewegung des Cäcilianismus, der seinen Niederschlag auch in Luxemburg hauptsächlich in der Person Heinrich Oberhoffers fand. Im vorliegenden Band wird der Briefwechsel zwischen Oberhoffer und dem Hauptvertreter des Cäcilianismus Franz Xaver Witt als Faksimile und in transkribierter Form erstmals veröffentlicht. Vorangestellt sind biographische Skizzen von Witt und Oberhoffer sowie eine Einführung in den Cäcilianismus. Die Studie ist nicht nur für den Cäcilianismus luxemburgischer Prägung von Belang, sondern versteht sich außerdem als Anregung für weitere Forschungsanstrengungen im Zusammenhang mit katholischer Kirchenmusik zwischen 1850 und 1900. [less ▲]

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See detailKatholische Kirchenmusik und Cäcilianismus in Luxemburg Band 2. Briefwechsel Franz Xaver Witt in Zusammenhang mit Luxemburg
Sagrillo, Damien UL

Book published by Margraf (2017)

Die vorliegende Veröffentlichung ist ein Ergebnis dreier Forschungsprojekte, darunter hauptsächlich „Musikgeschichte in Luxemburg“. Es wurde in den Jahren 2012- 2015 unter der Leitung von Damien Sagrillo ... [more ▼]

Die vorliegende Veröffentlichung ist ein Ergebnis dreier Forschungsprojekte, darunter hauptsächlich „Musikgeschichte in Luxemburg“. Es wurde in den Jahren 2012- 2015 unter der Leitung von Damien Sagrillo durchgeführt und von der Universität Luxemburg finanziert. Mit der staatlichen Unabhängigkeit Luxemburgs im 19. Jahrhundert und der Errichtung eines Bischofsitzes im Jahre 1870 hat sich, neben der weltlichen, zudem die Kirchenmusik in Luxemburg etabliert. Die zweite Hälfte des 19. Jahrhunderts ist geprägt durch die kirchenmusikalische Reformbewegung des Cäcilianismus, der seinen Niederschlag auch in Luxemburg hauptsächlich in der Person Heinrich Oberhoffers fand. Im vorliegenden Band wird – ergänzend zu Band 1, in welchem der Briefwechsel zwischen Heinrich Oberhoffer und Franz Xaver Witt thematisiert wurde – der Briefwechsel mit Witt im Zusammenhang mit Luxemburg als Faksimile und in transkribierter Form erstmals veröffentlicht. Vorangestellt sind biographische Skizzen von Witt und den Briefautoren in Zusammenhang mit Luxemburg, sowie eine Einführung in den Cäcilianismus. Die Studie ist nicht nur für den Cäcilianismus luxemburgischer Prägung von Belang, sondern versteht sich außerdem als Anregung für weitere Forschungsanstrengungen im Zusammenhang mit katholischer Kirchenmusik zwischen 1850 und 1900. [less ▲]

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See detailProperties of the water to boron nitride interaction: from zero to two dimensions with benchmark accuracy
Al-Hamdani, Yasmine UL; Rossi, Mariana; Alfè, Dario et al

in Journal of Chemical Physics (2017), 147

Molecular adsorption on surfaces plays an important part in catalysis, corrosion, desalination, and various other processes that are relevant to industry and in nature. As a complement to experiments ... [more ▼]

Molecular adsorption on surfaces plays an important part in catalysis, corrosion, desalination, and various other processes that are relevant to industry and in nature. As a complement to experiments, accurate adsorption energies can be obtained using various sophisticated electronic structure methods that can now be applied to periodic systems. The adsorption energy of water on boron nitride substrates, going from zero to 2-dimensional periodicity, is particularly interesting as it calls for an accurate treatment of polarizable electrostatics and dispersion interactions, as well as posing a practical challenge to experiments and electronic structure methods. Here, we present reference adsorption energies, static polarizabilities, and dynamic polarizabilities, for water on BN substrates of varying size and dimension. Adsorption energies are computed with coupled cluster theory, fixed-node quantum Monte Carlo (FNQMC), the random phase approximation, and second order Møller-Plesset theory. These wavefunction based correlated methods are found to agree in molecular as well as periodic systems. The best estimate of the water/h-BN adsorption energy is −107 ± 7 meV from FNQMC. In addition, the water adsorption energy on the BN substrates could be expected to grow monotonically with the size of the substrate due to increased dispersion interactions, but interestingly, this is not the case here. This peculiar finding is explained using the static polarizabilities and molecular dispersion coefficients of the systems, as computed from time-dependent density functional theory (DFT). Dynamic as well as static polarizabilities are found to be highly anisotropic in these systems. In addition, the many-body dispersion method in DFT emerges as a particularly useful estimation of finite size effects for other expensive, many-body wavefunction based methods. [less ▲]

Detailed reference viewed: 20 (1 UL)