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See detailTowards Collaborative Traffic Sensing using Mobile Phones
Frank, Raphaël UL; Mouton, Maximilien UL; Engel, Thomas UL

in Proceedings of the IEEE Vehicular Networking Conference 2012 (2012)

Participatory mobile sensing applications are becoming increasingly popular. The growing population of privately-held mobile smartphones enables a plethora of new services. One of the most promising ... [more ▼]

Participatory mobile sensing applications are becoming increasingly popular. The growing population of privately-held mobile smartphones enables a plethora of new services. One of the most promising application areas is collaborative traffic sensing. Here, smartphones are used as mobile sensors to collect and share relevant location information in order to reconstruct a global picture of the traffic situation in a monitored area. There are several challenges that need to be addressed in order to provide an efficient and ubiquitous service. In this talk we present how low-cost mobile smartphones can be used for such services without compromising the everyday usage of the device. We first test several sensing policies and evaluate how they affect location accuracy and battery life. We then perform a penetration rate study to identify the proportion of participants required to provide good service by varying several parameters. The outcome shows that if configured correctly, smartphones can be used as accurate mobile traffic sensors providing important information even at low penetration rates. [less ▲]

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See detailTowards combined global monthly gravity field solutions
Jäggi, Adrian; Meyer, Ulrich; Weigelt, Matthias UL et al

Scientific Conference (2014, April)

Detailed reference viewed: 67 (0 UL)
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See detailTowards combined global monthly gravity field solutions
Jäggi, A.; Meyer, U.; Beutler, G. et al

Scientific Conference (2013, October)

Detailed reference viewed: 36 (1 UL)
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See detailTowards Computational Models for a Long-term Interaction with an Artificial Conversational Companion
Danilava, Sviatlana UL; Busemann, Stephan; Schommer, Christoph UL et al

in Proceedings "5th International Conference on Agents an Artificial Intelligence" (2013)

Detailed reference viewed: 90 (8 UL)
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See detailTowards computerized analysis of folksong
Sagrillo, Damien UL

in Muzyka, XLVIII (2003), 1

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See detailTowards Connectivity Improvement in VANETs using Bypass Links
Dorronsoro, Bernabé UL; Ruiz, Patricia UL; Danoy, Grégoire UL et al

in Abstract book of 2009 IEEE Congress on Evolutionary Computation (2009)

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See detailTowards consolidated methods for the design and evaluation of user experience
Lallemand, Carine UL

Doctoral thesis (2015)

In the “third wave” of Human-Computer Interaction (HCI), the emergence of User Experience (UX) as a key concept has opened up both exciting perspectives and hard challenges. The conceptual shift to a more ... [more ▼]

In the “third wave” of Human-Computer Interaction (HCI), the emergence of User Experience (UX) as a key concept has opened up both exciting perspectives and hard challenges. The conceptual shift to a more comprehensive and emotional view of human-computer interactions has been accompanied by the development of numerous methods and tools for the design and evaluation of interactive systems. UX research has thus been mainly driven by novelty and innovation and to date a majority of the developed tools lack validation and consolidation. UX research undoubtedly raises new concerns and challenges common conceptual and methodological practice. Thus the primary objective of this thesis is to contribute to UX consolidation. We addressed this objective by relying on a mixed-methods approach for the empirical part of this thesis, involving comparatively large and representative samples. This part encompasses six studies, representing a variety of perspectives related to UX research consolidation. More specifically, this dissertation includes a replication study (Paper A, N = 758), the translation and validation of a tool (Paper B, N = 381), the development of new design and evaluation methods (Paper C and D, N = 137 and 33), the empirical assessment of the relevance of established HCI methods for the evaluation of UX (Paper E, N = 103) and finally an investigation on how to bridge UX research and practice through a design approach (Paper F). The contributions of this thesis to UX research and practice regard both UX as a concept and its methodologies. Main findings inform about the benefits, challenges, and limitations of UX consolidation strategies as derived from our respective studies (papers A to F). Each study provides advances to both research and practice, while the combination of our studies pushes forward consolidation of UX. This is an essential step with regards to an emerging concept and informs an overarching research agenda aiming at a continuous interdisciplinary fostering of the UX field. [less ▲]

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See detailTowards Dependable CPS Infrastructures: Architectural and Operating-System Challenges
Volp, Marcus UL; Asmussen, Nils; Härtig, Hermann et al

Scientific Conference (2015)

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See detailTowards Dialogue Games for the Down-Admissible and Up-Complete Procedures
Caminada, Martin; Booth, Richard UL

E-print/Working paper (2014)

Recently, two operators - the down-admissible and up-complete operators - have been proposed, in the context of aggregating argument labellings, for repairing a given initial labelling so that it becomes ... [more ▼]

Recently, two operators - the down-admissible and up-complete operators - have been proposed, in the context of aggregating argument labellings, for repairing a given initial labelling so that it becomes rational, in the sense that it respects the attack relation between the arguments. The purpose of this research note is to give some initial thoughts on defining dialogue games for each of them, as well as for their combination. [less ▲]

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See detailTowards Disentangling Sentiment from Risk Premia
Lehnert, Thorsten UL

Scientific Conference (2015)

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See detailTowards Domain Completeness for Model Transformations Based on Triple Graph Grammars
Nachtigall, Nico UL; Hermann, Frank UL; Braatz, Benjamin UL et al

in Amrani, Moussa; Syriani, Eugene; Wimmer, Manuel (Eds.) Proceedings of the Third International Workshop on Verification of Model Transformations - co-located with Software Technologies: Applications and Foundations (STAF 2014) (2014)

The analysis of model transformations is a challenging research area within model driven engineering. Triple graph grammars (TGGs) have been applied in various transformation scenarios and their formal ... [more ▼]

The analysis of model transformations is a challenging research area within model driven engineering. Triple graph grammars (TGGs) have been applied in various transformation scenarios and their formal foundation has been a vital ground for general results concerning notions of correctness and completeness. This paper addresses existing gaps between practical scenarios and the formal results of TGGs concerning the notion of completeness. Since the source domain language of a model transformation is usually specified independently from the TGG, we use the notion of domain completeness, which requires that the model transformation has to provide a corresponding target model for each model of the source domain language. As main result, we provide a general method for showing that the source domain language is included in the language that is generated by the source rules of the TGG. This provides the first of two components for verifying domain completeness. The running example is the well studied object-relational mapping. [less ▲]

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See detailTowards E-Conviviality in Web-Based Systems by considering the Wisdom of Crowds
Kaufmann, Sascha UL; Schommer, Christoph UL

in Abstract book of 2nd Conference on Agents and Artificial Intelligence (ICAART 2010) (2010)

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See detailTowards Effective Shell Modelling with the FEniCS Project
Hale, Jack UL; Baiz, P. M.

Scientific Conference (2013, March)

Fast and efficient simulations of shell structures are required in a wide range of engineering fields such as fluid-structure interaction and structural optimisation. Because of its expressive high-level ... [more ▼]

Fast and efficient simulations of shell structures are required in a wide range of engineering fields such as fluid-structure interaction and structural optimisation. Because of its expressive high-level form language UFL the FEniCS project is in an ideal position to tackle tough problems such as large deformations of non-isotropic shells. In this talk we will discuss some aspects of achieving this goal; generalised mixed formulations, reduction and projection operators for eliminating shear and membrane locking, the general shell model vs classical models and the recent work by Rognes et al. on manifolds. [less ▲]

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See detailTowards efficient dispersion of carbon nanotubes in thermotropic liquid crystals
Schymura, Stefan; Kühnast, Martin; Lutz, Vanessa et al

in Advanced Functional Materials (2010), 20(19), 3350-3357

Motivated by numerous recent reports indicating attractive properties of composite materials of carbon nanotubes (CNTs) and liquid crystals (LCs) and a lack of research aimed at optimizing such composites ... [more ▼]

Motivated by numerous recent reports indicating attractive properties of composite materials of carbon nanotubes (CNTs) and liquid crystals (LCs) and a lack of research aimed at optimizing such composites, the process of dispersing CNTs in thermotropic LCs is systematically studied. LC hosts can perform comparably or even better than the best known organic solvents for CNTs such as N-methyl pyrrolidone (NMP), provided that the dispersion process and choice of LC material are optimized. The chemical structure of the molecules in the LC is very important; variations in core as well as in terminal alkyl chain influence the result. Several observations moreover indicate that the anisotropic nematic phase, aligning the nanotubes in the matrix, per se stabilizes the dispersion compared to a host that is isotropic and thus yields random tube orientation. The chemical and physical phenomena governing the preparation of the dispersion and its stability are identified, taking into account enthalpic, entropic, as well as kinetic factors. This allows a guideline on how to best design and prepare CNT–LC composites to be sketched, following which tailored development of new LCs may take the advanced functional material that CNT–LC composites comprise to the stage of commercial application. [less ▲]

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See detailTowards Empirical Evaluation of Automated Risk Assessment Methods
Gadyatskaya, Olga UL; Labunets, Katsiaryna; Paci, Federica

in Risks and Security of Internet and Systems (2016)

Security risk assessment methods are numerous, and it might be confusing for organizations to select one. Researchers have conducted empirical studies with established methods in order to find factors ... [more ▼]

Security risk assessment methods are numerous, and it might be confusing for organizations to select one. Researchers have conducted empirical studies with established methods in order to find factors that influence their eff ectiveness and ease of use. In this paper we evaluate the recent TREsPASS semi-automated risk assessment method with respect to the factors identfii ed as critical in several controlled experiments. We also argue that automation of risk assessment raises new research questions that need to be thoroughly investigated in future empirical studies. [less ▲]

Detailed reference viewed: 30 (0 UL)
See detailTowards Europe 2020 out of the Economic Crisis: Is the Project Bond iniative a means to financial stability and integration?
Kavvadia, Helen UL

in Review of decentralization, local government and regional development (2013), 73

Since the establishment of the single monetary policy and introduction of the euro, it is pertinent to investigate the link between financial stability and integration. Is there a complementarity between ... [more ▼]

Since the establishment of the single monetary policy and introduction of the euro, it is pertinent to investigate the link between financial stability and integration. Is there a complementarity between the two or are financial stability and integration a contradiction in terms? In other words, isn't a search for a highly integrated financial system that would strengthen stability a bit like a search for the Holy Grail? Investment has been the cementing element of EU integration, institutions and policies - in brief, in creating more Europe. More concretely, investment in people, in knowledge and in physical assets, to ensure that Europe preserves its role and position in the world. The current crisis transcends national, even continental borders. Europe is reminded of its severity on a daily basis. Record unemployment is one of the consequences; shrinking public budgets and financial austerity another. In the run-up to the current recession investment grew by 5- 6% a years. Exporters and home buyers drove this expansion, which ended in 2008. Since then, the lack of investment has been a main source of demand weakness in the European Union. A collapse of investment activity of this magnitude has inevitable repercussions for economic expansion in the longer term. If productive capital stocks do not grow - indeed, if they are not even maintained - EU growth potential will inevitably shrink. A revival of investment activity is therefore is crucial to the long-term growth prospects of Europe. One precondition for such an investment revival is access to reasonably priced funding for long-term projects. The process of fiscal consolidation at national and European level has already placed a severe restriction on public budgets - and will continue to do so in the medium term. This pressure means that the EU has to find ways to achieve more with less. In particular, at European level, one needs to ensure that a limited EU budget is used to maximum effect. The newly established EU project bond initiative is seen as a means to go ahead in the current circumstances. As it does not impose an additional burden on domestic budgets, sovereign debt or contingent liabilities. The review looks into the type of investment that can be catered by the project bond initiative and the sectors selected for magnifying the growth potential. [less ▲]

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See detailTowards exposure of elusive metabolic mixed-culture processes: the application of metaproteomic analyses to activated sludge
Wilmes, Paul UL; Bond, P. L.

in Water Science & Technology (2006), 54(1), 217-226

4th IWA Activated Sludge Population Dynamics Conference (ASPD4) Location: Gold Coast, AUSTRALIA Date: JUL 17-20, 2005 Sponsor(s): IWA Specialist Grp Activated Sudge Populat Dynam; Adv Wastewater ... [more ▼]

4th IWA Activated Sludge Population Dynamics Conference (ASPD4) Location: Gold Coast, AUSTRALIA Date: JUL 17-20, 2005 Sponsor(s): IWA Specialist Grp Activated Sudge Populat Dynam; Adv Wastewater management Ctr; Australian Water Assoc Abstract: Protein expression is a direct reflection of specific microbial activities in any ecosystem. In order to assess protein expression in mixed microbial communities, the feasibility of applying proteomic techniques to activated sludge samples has recently been demonstrated. We report the application of metaproteomics to two activated sludges from a laboratory-scale sequencing batch reactor with dissimilar phosphorus removal performances. Fluorescence in situ hybridization (FISH) revealed that the sludge with good enhanced biological phosphorus removal performance (EBPR) was dominated by Betaproteobacteria (65% of EUBMIX binding cells) and gave positive signals for the Rhodocyclus-type PAO specific probe (59%). The non-EBPR sludge was dominated by tetrad-forming Alphaproteobacteria (75%). With regard to the proteomic investigation, 630 individual protein spots were matched across the replicate groups of the anaerobic and aerobic phases of the EBPR sludge with 9.4% of all spots being statistically different between the two phases. The non-EBPR metaproteomic maps exhibited 590 matched spots with 14.7% statistical differences between the two phases. Overall, the non-EBPR sludge expressed around 30% more significant differences than the EBPR sludge. The comparison of protein expression in the two sludges showed that their metaproteomes were substantially different and this was reflected in their microbial community structures and metabolic transformations. [less ▲]

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See detailTowards Feature-Oriented Fault Tree Analysis
Behringer, Benjamin UL; Lehser, Martina; Rothkugel, Steffen UL

in Proceedinfs of the 38th Annual IEEE Computer Software and Applications Conference (COMPSAC Workshops 2014) (2014)

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See detailTowards Flexible Evolution of Dynamically Adaptive Systems
Perrouin, Gilles UL; Morin, Brice; Chauvel, Franck et al

in New Ideas & Emerging Results Track of the International Conference of Software Engineering (NIER@ICSE) (2012, June)

Modern software systems need to be continuously available under varying conditions. Their ability adapt to their execution context is thus increasingly seen as a key to their success. Recently, many ... [more ▼]

Modern software systems need to be continuously available under varying conditions. Their ability adapt to their execution context is thus increasingly seen as a key to their success. Recently, many approaches were proposed to design and support the execution of Dynamically Adaptive Systems (DAS). However, the ability of a DAS to evolve is limited to the addition, update or removal of adaptation rules or reconfiguration scripts. These artifacts are very specific to the control loop managing such a DAS and runtime evolution of the DAS requirements may affect other parts of the DAS. In this paper, we argue to evolve all parts of the loop. We suggest leveraging recent advances in model-driven techniques to offer an approach that supports the evolution of both systems and their adaptation capabilities. The basic idea is to consider the control loop itself as an adaptive system. [less ▲]

Detailed reference viewed: 55 (0 UL)