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See detailTowards a Roadmap for Privacy Technologies and the General Data Protection Regulation : A transatlantic initiative
Schiffner, Stefan UL; Berendt, Bettina; Siil, Triin et al

in Tsouroulas, Nikolaos; Rannenberg, Kai; Medina, Manel (Eds.) proceedings of the Annual Privacy Forum 2018 (2018)

Detailed reference viewed: 38 (2 UL)
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See detailTowards a Robot Perception Specification Language
Hochgeschwender, Nico; Schneider, Sven; Voos, Holger UL et al

in 4th International Workshop on Domain-Specific Languages and models for ROBotic systems (DSLRob-13), Tokyo, Japan, Nov. 2013 (2013, November)

Detailed reference viewed: 62 (1 UL)
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See detailTowards a scaling-sensitive social research work
Haas, Claude UL; Marthaler, Thomas UL; Uhler, Nicolas

Scientific Conference (2016, August)

Sociology’s knowledge-making practices consist primarily in cutting social reality (realities) into distinct, but overlapping and abstract entities, which are variously juxtaposed and micro-/macrofied ... [more ▼]

Sociology’s knowledge-making practices consist primarily in cutting social reality (realities) into distinct, but overlapping and abstract entities, which are variously juxtaposed and micro-/macrofied depending on the underlying theoretical assumptions as they are “worked” by researchers. (Social) research as an ongoing process of cutting abstract entities is thus producing an almost infinite plurality of scales. In this sense, it is not surprising that we periodically assist at the emergence of new “turns”, from the cognitive to the material and the linguistic or emotional. This group addresses persons who are interested in working on how persons-as-researchers-and-theorists-cut-and-invent-social-reality. For the organizers, the work of Andrew Abbott as well as Marilyn Strathern has inspired the following questions: How do social theories cut, invent and try to covenant social reality? How is social reality cut, invented and covenanted in so-called professional contexts? How is social reality cut, invented and covenanted by methods of social research? [less ▲]

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See detailTowards a seamless Integration of CAD and Simulation: CISM Course 2017
Bordas, Stéphane UL

Learning material (2017)

Isogeometric analysis relies on the use of the same basis functions as employed in Computer Aided Design (CAD). This offers the possibility to facilitate design and optimisation. The previous course ... [more ▼]

Isogeometric analysis relies on the use of the same basis functions as employed in Computer Aided Design (CAD). This offers the possibility to facilitate design and optimisation. The previous course “Isogeometric methods for numerical simulation” held in 2013 had the aim to give an introduction to isogeometric analysis, its advantages, drawbacks and to the range of its applications. The aim of the proposed new course will be different. The focus will be more on the connection of simulation to CAD systems and how CAD data can be used directly for simulation, leading to a seamless integration. An overview of recent advances and applications will be also presented. The course will start with an introduction to NURBS and their use in describing geometry and in simulation. This will be followed by lectures from a CAD vendor describing the current state of development. Currently available connections to simulation software will also be discussed. Next the use of NURBS for 3D structural analysis, structural optimisation and damage tolerance assessment will be presented, including such advanced topics as the treatment of discontinuities and real-time solvers. It will also be discussed when it might be advantageous to decouple the boundary discretisation from the field variable discretisation, in particular in shape optimisation. Isogeometric methods for the analysis of beam and shell structures, including shape optimisation and fluid structure interaction, will be presented. Lectures on the mathematical and algorithmic foundations of analysis-suitable geometry will follow. This includes an introduction to T-splines and multilevel spline schemes such as hierarchical B- splines. Common analysis-suitable spline algorithms will be presented in the context of Bézier extraction and projection as well as its application as a foundation for integrated engineering design and analysis. An important aspect of analysis-suitable geometry is the ability to locally adapt the smooth spline basis. Several common refinement algorithms will be reviewed as well as their application in several demanding areas of application. The emerging area of weak geometry will be introduced as well as its application to the rapid construction of complex structural assemblies. With the rapid development of isogeometric analysis in recent years, there is an urgent need for volumetric parameterization such as volumetric T-spline model construction. Several volumetric T- spline modeling techniques, that were developed in recent years will be presented. They include converting any quad/ hex meshes to standard and rational T-splines, polycube-based parametric mapping, feature preservation using eigenfunctions, Boolean operations and skeletons, truncated hierarchical Catmull-Clark subdivision, weighted T-splines, conformal T-spline modeling, as well as incorporating T-splines into commercial CAD and FEA software, will be presented. The target audience will be engineers, interested in simulation, software developers and researchers. [less ▲]

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See detailTowards a Simple City Driving Simulator Based on Speed Dreams and OSM
Avanesov, Tigran UL; Louveton, Nicolas UL; McCall, Roderick UL et al

in Adjunct Proceedings of 4th International Conference on Automotive User Interfaces and Interactive Vehicular Applications (2012), 2

This paper presents an architecture and partially built simulation platform which is designed to offer a flexible open ended approach for conducting laboratory experiments. The emphasis is on supporting ... [more ▼]

This paper presents an architecture and partially built simulation platform which is designed to offer a flexible open ended approach for conducting laboratory experiments. The emphasis is on supporting multiple drivers and the ability to swap in and out different software components and devices. [less ▲]

Detailed reference viewed: 154 (20 UL)
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See detailTowards a statement of the S-adic conjecture through examples
Durand, F.; Leroy, Julien UL; Richomme, G.

Scientific Conference (2011, June)

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See detailTowards a strategic integration of digital technologies into classrooms
Reuter, Bob UL

Speeches/Talks (2016)

Many people think that we need simply need to provide schools with more digital technologies in order to enhance learning outcomes. However, access to the tools is not enough, teachers need to know how to ... [more ▼]

Many people think that we need simply need to provide schools with more digital technologies in order to enhance learning outcomes. However, access to the tools is not enough, teachers need to know how to use these tools in effective ways. I will propose a number of theoretical and practical concepts useful for a strategic integration of digital technologies into teaching. The objective of my presentation will be double in the sense that I want to provide teachers with the conceptual tools to (1) better understand the use of digital media and technologies for learning & teaching purposes in educational settings and (2) better plan and design ICT-enriched learning & teaching activities, grounded in learning sciences and connected to specific local contexts. I will present some examples of pedagogical practices that used such a strategic integration of ICT approach in Luxembourg. [less ▲]

Detailed reference viewed: 40 (4 UL)
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See detailTowards Ambient Intelligent Applications Using Models@run.time And Machine Learning For Context-Awareness
Moawad, Assaad UL

Doctoral thesis (2016)

Ambient Intelligence (AmI) constitutes a new paradigm of interaction among humans, smart objects and devices. AmI systems are expected to support humans in their every day tasks and activities. In order ... [more ▼]

Ambient Intelligence (AmI) constitutes a new paradigm of interaction among humans, smart objects and devices. AmI systems are expected to support humans in their every day tasks and activities. In order to achieve this goal, these systems require augmenting the environment with sensing, computing, communicating, and reasoning capabilities. Due to advances in technology, sensors are getting more powerful, cheaper and smaller, which stimulated large scale development and production. These sensors will generate a big amount of data and can easily lead to millions of values in a short amount of time, which can quickly reach the computation and storage limits when it comes to structuring and processing the data. For this problem, we propose a concept of continuous models that can handle highly-volatile data, and represent the continuous nature of sensor data in an efficient and compact way. We show on various AmI datasets that this can significantly improve storage and efficiency. One important goal of AmI systems is to transform living and working environments into intelligent spaces able to adapt to their users’ needs and desires in real-time. In this sense, we call AmI applications context-aware, meaning that they use environmental information to adaptively provide more relevant and better services to the user. However, AmI systems are composed from heterogeneous components, operating in an open and dynamic environment. Each of these components can have different storage and computation capabilities. They might not have all the information needed to derive context information, and they might not be reachable all the time for various reasons. In this thesis, we present a contextual reasoning solution adapted for component based platforms. Our solution can derive contextual information in a distributed way and can handle inconsistencies when contradictory information is received from several components. Other than the storage and computation efficiency, several qualities need to be satisfied according to the different contexts. Privacy is one of these qualities. AmI services will rely more and more on personal data that is vastly collected, stored, and exchanged with other third parties in order to provide added-value services. Such data are sensitive and often related to personal activities and therefore can lead to privacy risks, especially when data is shared with high precision and frequency. However, this privacy quality can be relaxed in some contexts, for example in an emergency situation in order to increase utility or efficiency. This leads to the need of developing an adaptive solution that is able to react to context changes in real-time and involve optimizing conflicting objectives. For this challenge, we propose to use blurring components as our main privacy preservation elements. The idea behind this approach is that, by gradually decreasing the data quality, a blurring component is able to hide some of the personal data delivered by sensors while still keeping the necessary information for the services to work. In order to find a good trade-off between these different conflicting objectives, we adapt a multi-objective evolutionary algorithm to run directly on top of domain specific models. We then apply it as our main optimization engine on models@run.time to keep adapting the different qualities, when the context change. Finally, AmI services are expected to be tailored for different users’ needs in a seamless and unobtrusive way. Meaning that they should be able to detect contexts and learn habits automatically with the least possible intervention of users. In order to achieve this, machine learning (ML) techniques need to be merged at the core of reasoning models. These techniques offer powerful tools to automatically detect patterns, categorize contexts, build usage profiles, represent data with compact mathematical hypothesis and provide statistical information vital for the intelligent aspect of AmI. This dissertation ends up by opening new directions on how to model and adapt machine learning techniques to fit for AmI platforms. Overall, this thesis provides solutions for the next leap of technology, where sensors become ubiquitous. Our solutions, implemented in an open source framework KMF, allow to create efficient and distributed, data and component models for IoT, adaptable at runtime leveraging multi-objective optimization to find good tradeoff between qualities for the current context, and machine learning techniques to derive contextual rules, profile and learn habits automatically. [less ▲]

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See detailTowards an ab initio description of the charge transfer between a proton and a lithium fluoride surface: A quantum chemistry approach
Tiwald, Paul; Gräfe, Stefanie; Burgdörfer, Joachim et al

in Nuclear Instruments and Methods in Physics Research B (2013), 317, Part A

We study the non-adiabatic charge transfer dynamics during the collision of a slow proton with a lithium fluoride surface employing a quantum-chemistry based dynamics approach. The surface is modeled by ... [more ▼]

We study the non-adiabatic charge transfer dynamics during the collision of a slow proton with a lithium fluoride surface employing a quantum-chemistry based dynamics approach. The surface is modeled by an Li5F1+ H+ cluster embedded in a large matrix of point charges. Going beyond the adiabatic (or Born–Oppenheimer) approximation, we apply multi-reference configuration-interaction methods that allow for the calculation of ground and excited states of the embedded cluster as well as of the non-adiabatic couplings between them. This information serves as input for the determination of the neutralization probability of a proton scattered off a LiF surface using Tully’s semi-classical surface hopping algorithm. [less ▲]

Detailed reference viewed: 47 (1 UL)
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See detailTowards an Abstract Framework for Compliance
Colombo Tosatto, Silvano UL; Governatori, Guido; Kelsen, Pierre UL

in Bagheri, Ebrahim; Gasevic, Dragan; Halle, Sylvain (Eds.) et al Proceedings of the 17th IEEE International EDOC 2013 Conference Workshops, Vancouver, Canada, 9 September 2013. (2013, September 09)

The present paper aims at providing an abstract framework to define the regulatory compliance problem. In particular we show how the framework can be used to solve the problem of deciding whether a ... [more ▼]

The present paper aims at providing an abstract framework to define the regulatory compliance problem. In particular we show how the framework can be used to solve the problem of deciding whether a structured process is compliant with a single regulation, which is composed of a primary obligation and a chain of compensations. [less ▲]

Detailed reference viewed: 62 (8 UL)
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See detailTowards an Alloy Formal Model for Flexible Advanced Transactional Model Development
Gallina, Barbara UL; Guelfi, Nicolas UL; Kelsen, Pierre UL

in Abstract book of 33rd Annual IEEE Software Engineering Workshop 2009 (SEW-33) (2009)

SPLACID is a semi-formal language conceived for the specification and synthesis of (advanced) transactional models from basic features, such as transaction types and (relaxed) ACID variants. SPLACID is an ... [more ▼]

SPLACID is a semi-formal language conceived for the specification and synthesis of (advanced) transactional models from basic features, such as transaction types and (relaxed) ACID variants. SPLACID is an improvement of the ACTA framework offering a well-structured and formal syntax. Neither ACTA nor SPLACID, however, benefit from a formal tool-supported semantics. This paper presents the first step for having a full formal semantics of SPLACID by translation to Alloy. In particular, we present the translation of the SPLACID concepts into Alloy concepts focusing on those concepts pertaining to the structure of a Transactional Model and those characterizing the isolation variant. The Alloy specification obtained by this translation preserve the SPLACID main key-properties, namely, modularity, flexibility and reusability. To support this claim we show how flexible, modular and reusable structures and isolation variants can be obtained in Alloy. Finally, we analyze the flat and nested transactional model structures and the serializability-based isolation variant using the Alloy Analyzer. [less ▲]

Detailed reference viewed: 33 (1 UL)
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See detailTowards An Analysis Driven Approach for Adapting Enterprise Architecture Languages
De Kinderen, Sybren UL; Ma, Qin UL

in 6th international EMISA workshop, Luxembourg-ville, 25 to 26 september 2014 (2014)

Enterprise Architecture (EA) modeling languages are increasingly used for various enterprise wide analyses. In most cases one needs to adapt EA languages to an appropriate level of detail. However such an ... [more ▼]

Enterprise Architecture (EA) modeling languages are increasingly used for various enterprise wide analyses. In most cases one needs to adapt EA languages to an appropriate level of detail. However such an adaptation is not straightforward. Language engineers currently deal with analysis driven language adaptation in an ad-hoc manner, adapting languages from scratch. This introduces various problems, such as a tendency to add uninteresting and/or unnecessary details to languages, while important enterprise details are not documented. Moreover, adding detail increases the complexity of languages, which in turn inhibits a language's communication capabilities. Yet experience from practice shows that architects often are communicators, next to analysts. As a result, one needs to find a balance between a model's communication and analysis capabilities. In this position paper we argue for an approach for assisting language engineers in adapting, in a controlled manner, EA languages for model-driven enterprise analyses. Furthermore, we present the key ingredients of such an approach, and use these as a starting point for a research outlook. [less ▲]

Detailed reference viewed: 21 (3 UL)
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See detailTowards an Archaeology of Television
Fickers, Andreas UL; Weber, Anne-Katrin

in Journal of European Television History and Culture (2015), 4(7), 1-6

Detailed reference viewed: 164 (13 UL)
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See detailTowards an Autonomous Vision-Based Unmanned Aerial System against Wildlife Poachers
Olivares Mendez, Miguel Angel UL; Fu, Changhong; Ludivig, Philippe et al

in Sensors (2015), 15(12), 29861

Poaching is an illegal activity that remains out of control in many countries. Based on the 2014 report of the United Nations and Interpol, the illegal trade of global wildlife and natural resources ... [more ▼]

Poaching is an illegal activity that remains out of control in many countries. Based on the 2014 report of the United Nations and Interpol, the illegal trade of global wildlife and natural resources amounts to nearly $213 billion every year, which is even helping to fund armed conflicts. Poaching activities around the world are further pushing many animal species on the brink of extinction. Unfortunately, the traditional methods to fight against poachers are not enough, hence the new demands for more efficient approaches. In this context, the use of new technologies on sensors and algorithms, as well as aerial platforms is crucial to face the high increase of poaching activities in the last few years. Our work is focused on the use of vision sensors on UAVs for the detection and tracking of animals and poachers, as well as the use of such sensors to control quadrotors during autonomous vehicle following and autonomous landing. [less ▲]

Detailed reference viewed: 137 (39 UL)
See detailTowards an Effective Teaching of Grammar at Advanced Level
Weber, Jean-Jacques UL; Wengler, A.

in Un enseignement moderne des langues vivantes étrangères pour des citoyens européens (1998)

Detailed reference viewed: 12 (0 UL)
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See detailTowards an integrative view of cognitive biases in pain.
van Ryckeghem, Dimitri UL; Vervoort, Tine

in European journal of pain (London, England) (2016), 20(8), 1201-2

Detailed reference viewed: 17 (2 UL)
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See detailTowards asymmetric searchable encryption with message recovery and flexible search authorization
Tang, Qiang UL; Chen, Xiaofeng

in Proceeding of 8th ACM Symposium on Information, Computer and Communications Security (ASIACCS 2013) (2013)

Detailed reference viewed: 57 (3 UL)