Last 7 days
Bookmark and Share    
Peer Reviewed
See detailCharacterizing Driving Environments Through Bluetooth Discovery
Bronzi, Walter UL; Faye, Sébastien UL; Frank, Raphaël UL et al

Scientific Conference (2017, October)

Within the world of wireless technologies, Bluetooth has recently been at the forefront of innovation. It is becoming increasingly relevant for vehicles to become aware of their surroundings. Therefore ... [more ▼]

Within the world of wireless technologies, Bluetooth has recently been at the forefront of innovation. It is becoming increasingly relevant for vehicles to become aware of their surroundings. Therefore, having knowledge of nearby Bluetooth devices, both inside and outside other vehicles, can provide the listening vehicles with enough data to learn about their environment. In this paper, we collect and analyze a dataset of Bluetooth Classic (BC) and Low Energy (BLE) discoveries. We evaluate their respective characteristics and ability to provide context-aware information from a vehicular perspective. By taking a look at data about the encountered devices, such as GPS location, quantity, quality of signal and device class information, we infer distinctive behaviors between BC and BLE relative to context and application. For this purpose, we propose a set a features to train a classifier for the recognition of different driving environments (i.e. road classes) from Bluetooth discovery data alone. Comparing the performance of our classifier with different sampling parameters, the presented results indicate that, with our feature selection, we are able to predict with reasonable confidence up to three classes (Highway, City, Extra-Urban) by using only discovery data and no geographical information. This outcome gives promising results targeted at low energy and privacy-friendly applications and can open up a wide range of research directions. [less ▲]

Detailed reference viewed: 37 (4 UL)
See detailGesellschaftlicher Wandel als Re-Formierung sozialer Praxis: Analytische Zugänge
Wille, Christian UL

Scientific Conference (2017, October)

In Abgrenzung zu herkömmlichen Beschreibungen von gesellschaftlichen Verhältnissen entwerfen Praxistheorien eine Vision von Sozietät, die performativ angelegt ist, Materialität und Körperlichkeit betont ... [more ▼]

In Abgrenzung zu herkömmlichen Beschreibungen von gesellschaftlichen Verhältnissen entwerfen Praxistheorien eine Vision von Sozietät, die performativ angelegt ist, Materialität und Körperlichkeit betont und Formen des Wandels integriert. Allerdings geben die Praxistheorien (zunächst) keine modellhaften Erklärungen für gesellschaftliche Verhältnisse oder verweisen (offenkundig) auf Stellschrauben für die Steuerung des Sozialen. Im Sinne einer dynamischen Heuristik bieten sie vielmehr vielfältige und miteinander verknüpfte Beschreibungs- und Analysekategorien, treffen Aussagen über (angenommene) Zusammenhänge und versuchen die Heterogenität und Widersprüchlichkeit des Sozialen als Vollzugswirklichkeiten zu greifen. Der Vortrag setzt an dieser Stelle an und will die Chancen und Grenzen einer praxistheoretischen Reformulierung und Untersuchung von gesellschaftlichen Verhältnissen unter dem Aspekt von Wandel umreißen. Dafür wird besonders auf den flexiven Charakter von sozialen Praktiken eingegangen (In/Stabilität), das Moment der Praxislogik entwickelt (Wissen) und gefragt, inwiefern Praxistheorien eine diachrone Perspektive vorsehen (Rekonfiguration). Letztere erscheint unverzichtbar für die Thematisierung von Wandel und soll helfen praxistheoretisch orientierte Ansatzpunkte seiner Untersuchung zu identifizieren. Der Vortrag verzichtet auf empirische Beispiele, überträgt die Überlegungen allerdings auf Fragen des Forschungsprozesses. [less ▲]

Detailed reference viewed: 14 (1 UL)
Full Text
Peer Reviewed
See detailRelay Selection Strategies for SWIPT-Enabled Cooperative Wireless Systems
Gautam, Sumit UL; Lagunas, Eva UL; Sharma, Shree K. et al

in IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Montreal, Canada, Oct. 2017 (2017, October)

Detailed reference viewed: 51 (13 UL)
See detailAssessing adaptive task assignments in a simulated classroom setting
Hörstermann, Thomas UL

Scientific Conference (2017, October)

Detailed reference viewed: 10 (0 UL)
Full Text
See detailTowards Automatic Human Body Model Fitting to a 3D Scan
Saint, Alexandre Fabian A UL; Shabayek, Abd El Rahman UL; Aouada, Djamila UL et al

in D'APUZZO, Nicola (Ed.) Proceedings of 3DBODY.TECH 2017 - 8th International Conference and Exhibition on 3D Body Scanning and Processing Technologies, Montreal QC, Canada, 11-12 Oct. 2017 (2017, October)

This paper presents a method to automatically recover a realistic and accurate body shape of a person wearing clothing from a 3D scan. Indeed, in many practical situations, people are scanned wearing ... [more ▼]

This paper presents a method to automatically recover a realistic and accurate body shape of a person wearing clothing from a 3D scan. Indeed, in many practical situations, people are scanned wearing clothing. The underlying body shape is thus partially or completely occluded. Yet, it is very desirable to recover the shape of a covered body as it provides non-invasive means of measuring and analysing it. This is particularly convenient for patients in medical applications, customers in a retail shop, as well as in security applications where suspicious objects under clothing are to be detected. To recover the body shape from the 3D scan of a person in any pose, a human body model is usually fitted to the scan. Current methods rely on the manual placement of markers on the body to identify anatomical locations and guide the pose fitting. The markers are either physically placed on the body before scanning or placed in software as a postprocessing step. Some other methods detect key points on the scan using 3D feature descriptors to automate the placement of markers. They usually require a large database of 3D scans. We propose to automatically estimate the body pose of a person from a 3D mesh acquired by standard 3D body scanners, with or without texture. To fit a human model to the scan, we use joint locations as anchors. These are detected from multiple 2D views using a conventional body joint detector working on images. In contrast to existing approaches, the proposed method is fully automatic, and takes advantage of the robustness of state-of-art 2D joint detectors. The proposed approach is validated on scans of people in different poses wearing garments of various thicknesses and on scans of one person in multiple poses with known ground truth wearing close-fitting clothing. [less ▲]

Detailed reference viewed: 14 (6 UL)
Full Text
See detailFamilles et égalité de traitement - Table ronde en droit fiscal
Chaouche, Fatima UL

Presentation (2017, October)

Detailed reference viewed: 10 (0 UL)
See detailExpérimenter les Humanités numériques
Clavert, Frédéric UL; Cavalié, Etienne; Legendre, Olivier et al

Book published by Presses Universitaires de Montréal (2017)

Univers en perpétuelle expansion et au foisonnement chaotique, Internet offre un nombre incalculable d’outils, dont l’exploration paraît parfois hors de portée. Dans le paysage des sciences humaines, les ... [more ▼]

Univers en perpétuelle expansion et au foisonnement chaotique, Internet offre un nombre incalculable d’outils, dont l’exploration paraît parfois hors de portée. Dans le paysage des sciences humaines, les blogs, les logiciels bibliographiques, les bases de données, les éditions en ligne et les wikis, tous ces objets qui éveillaient notre curiosité il y a une décennie, sont devenus aussi anodins qu’omniprésents. Mais comment bien s’en servir ? Les appréhensions face à ces outils — et leur simple mais robuste méconnaissance — sont encore largement répandues. Or on ne peut plus ignorer leur intérêt, voire leur nécessité et les chercheurs qui s’y essaient ne savent souvent pas par quel bout attraper ces logiciels nouveaux. C’est à cela que cet ouvrage veut les aider, de façon simple et précise, et il entend le faire sans en cacher les difficultés, mais sans dissimuler non plus qu’elles sont désormais connues, donc surmontables, et que, dans la majorité des cas, le résultat vaut tous les efforts à consentir. [less ▲]

Detailed reference viewed: 15 (0 UL)
See detail"Bandes dessinées" im Fremdsprachenunterricht Französisch
Morys, Nancy UL

Presentation (2017, September 29)

Detailed reference viewed: 10 (0 UL)
Full Text
See detailNeue Impulse für den Fremdsprachenunterricht – niederschwellige Zugänge zur dramapädagogischen Methode
Weyer, Dany UL; Göksel, Eva; Giebert, Stephanie

Speeches/Talks (2017)

Workshop given at the Congress of the DGFF.

Detailed reference viewed: 13 (4 UL)
Full Text
Peer Reviewed
See detailMultiscale model of sintering: diffusion and plastic flow
Kabore, Brice Wendlassida UL; Peters, Bernhard UL

Scientific Conference (2017, September 27)

Impacting particles or static aggregated particles at high temperature may undergo a permanent change of shape modifying the microstructure. Two particles in contact can develop some bonds within sub ... [more ▼]

Impacting particles or static aggregated particles at high temperature may undergo a permanent change of shape modifying the microstructure. Two particles in contact can develop some bonds within sub-second time. This fast sintering force in the particular case of the snow contribute to the rheological behavior and grain rearrangement [1]. Understanding the kinetics of sintering in granular material is of great importance in some engineering applications. For decades, diffusional processes have received more attention in investigations related to the mechanisms behind sintering [2]. Some works have suggested that the plastic flow might be neglected in sintering process for stresses are not high enough to cause dislocation. However, some studies have showed that stresses experienced in fine particles necks can be high enough and even lead to plasticity driven sintering. The importance of each mechanism in the sintering process may lie in the temporal and spatial scale of interest. Increasing importance is being accorded to the role of plastic flow in sintering. however, several investigations have proved that the conventional plasticity theory may fail to predict plastic activity at micro-scale, The objective of this work is to develop adequate computational model that includes instantaneous and time-dependent plastic flow at micro-scale. We aim at extending existing models of sintering and plasticity to cope with multiple spatial and temporal scales simulations using Extended Discrete Element Method. The numerical results are compare to experimental data on snow. [less ▲]

Detailed reference viewed: 39 (6 UL)
See detailInteger sequence #A292933
Marichal, Jean-Luc UL

Diverse speeches and writings (2017)

Number of associative and quasitrivial binary operations on {1,...,n} that have neutral elements. Also: Number of associative and quasitrivial binary operations on {1,...,n} that have annihilator elements.

Detailed reference viewed: 22 (4 UL)
See detailInteger sequence #A292932
Marichal, Jean-Luc UL

Diverse speeches and writings (2017)

Number of associative and quasitrivial binary operations on {1,...,n}. Convention a(0)=1.

Detailed reference viewed: 23 (6 UL)
See detailInteger sequence #A292934
Marichal, Jean-Luc UL

Diverse speeches and writings (2017)

Number of associative and quasitrivial binary operations on {1,...,n} that have both neutral and annihilator elements.

Detailed reference viewed: 20 (2 UL)
Full Text
Peer Reviewed
See detailDopamine oxidation mediates mitochondrial and lysosomal dysfunction in Parkinson's disease.
Burbulla, Lena F.; Song, Pingping; Mazzulli, Joseph R. et al

in Science (New York, N.Y.) (2017), 357(6357), 1255-1261

Mitochondrial and lysosomal dysfunction have been implicated in substantia nigra dopaminergic neurodegeneration in Parkinson's disease (PD), but how these pathways are linked in human neurons remains ... [more ▼]

Mitochondrial and lysosomal dysfunction have been implicated in substantia nigra dopaminergic neurodegeneration in Parkinson's disease (PD), but how these pathways are linked in human neurons remains unclear. Here we studied dopaminergic neurons derived from patients with idiopathic and familial PD. We identified a time-dependent pathological cascade beginning with mitochondrial oxidant stress leading to oxidized dopamine accumulation and ultimately resulting in reduced glucocerebrosidase enzymatic activity, lysosomal dysfunction, and alpha-synuclein accumulation. This toxic cascade was observed in human, but not in mouse, PD neurons at least in part because of species-specific differences in dopamine metabolism. Increasing dopamine synthesis or alpha-synuclein amounts in mouse midbrain neurons recapitulated pathological phenotypes observed in human neurons. Thus, dopamine oxidation represents an important link between mitochondrial and lysosomal dysfunction in PD pathogenesis. [less ▲]

Detailed reference viewed: 13 (0 UL)
Peer Reviewed
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: 10 (0 UL)
Full Text
See detailAb initio approaches to Resonant Raman Spectroscopy of Transition Metal Dichalcogenides
Pereira Coutada Miranda, Henrique UL

Doctoral thesis (2017)

This thesis deals with the theory and simulation of resonant Raman spectroscopy in two-dimensional transition metal dichalcogenides. We present two different ab initio approaches. In the first, we ... [more ▼]

This thesis deals with the theory and simulation of resonant Raman spectroscopy in two-dimensional transition metal dichalcogenides. We present two different ab initio approaches. In the first, we calculate the Raman susceptibility tensor as a function of laser energy from the change of the dielectric susceptibility with atomic displacements. In the second, we formulate the Raman tensor in terms of time-dependent perturbation theory and calculate it using electron-light and electron-phonon coupling matrix elements obtained from density functional theory. We investigate the role of resonance, quantum interference and excitonic effects in the Raman spectra of single and triple-layer MoTe2. We compare our simulations with experimental results, explaining the dependence of the Raman intensities on the excitation energy. We demonstrate that the two approaches are formally and numerically equivalent in the adiabatic limit. In addition, the second approach allows to include the dynamical effects and captures a shift of the intensities with respect to the adiabatic case. This method is also more computationally efficient and is extended to include temperature effects using many-body perturbation theory. We have implemented both of these methods in a software package with interfaces to open source ab initio codes. Furthermore, we have developed web based tools to visualize excitonic states and phonon modes. [less ▲]

Detailed reference viewed: 12 (1 UL)