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See detailSmart Probabilistic Fingerprinting for Indoor Localization over Fog Computing Platforms
Sciarrone, Andrea; Fiandrino, Claudio UL; Bisio, Igor et al

in IEEE 5th International Conference on Cloud Networking (CloudNet), Pisa, Italy (2016, October)

Indoor navigation and localization are becoming fundamental services nowadays. WiFi-based solutions such as FingerPrinting (FP) are the most widely adopted techniques for positioning and provide better ... [more ▼]

Indoor navigation and localization are becoming fundamental services nowadays. WiFi-based solutions such as FingerPrinting (FP) are the most widely adopted techniques for positioning and provide better results if compared to other approaches. It requires to compare WiFi Received Signal Strength (RSS) with an pre-computed radio map called fingerprint. The recently proposed Smart Probabilistic FingerPrinting (P-FP) algorithm reduces the computational complexity of the traditional FP approach without any accuracy detriment. On the other hand, fog computing has emerged as a new promising paradigm in the recent years, which extends traditional mobile cloud computing capabilities towards the edge of the network and enables location- aware services. In this paper we propose to offload Smart P-FP computation over a fog platform exploiting a novel distributed algorithm. Performance evaluation validates the effectiveness of the proposed approach with the analysis of: i) the amount of power saved and ii) the efficiency of candidate selection process for offloading. Having 2 or more devices in the vicinity contributing to the computation makes offloading beneficial from a power standpoint. The offloading effectiveness increases with the number of devices willing to contribute and the amount of data to be transferred. Power savings can be as high as 80% if compared with local computation. [less ▲]

Detailed reference viewed: 386 (28 UL)
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See detailSmart Transition to Renewable Energies? City-Regional Collaboration in Greater Manchester
Faller, Fabian UL

Scientific Conference (2012, May 14)

Making the transition to renewable, low carbon forms of energy could be the defining question of our times. Especially for complex problems like energy supply the regional scale and new forms of control ... [more ▼]

Making the transition to renewable, low carbon forms of energy could be the defining question of our times. Especially for complex problems like energy supply the regional scale and new forms of control, coordination and cooperation - subsumed under the term regional governance - are widely discussed both in politics (e.g. G8 conferences, Climate Summits etc.) and academia. The turn from conventional to renewable energies is one major topic of discussion. For this process of change regional governance can be seen as the best way to initiate it With the help of a case study conducted in Greater Manchester, UK, the article concentrates on two points: (1) the development of regional governance arrangements in the light of a low-carbon agenda as mixture of path-dependent bottom-up and top-down approaches and (2) the impacts of specific constellations for regional energy development that include institutional rules, strategic behaviour of actors and strategic discourses. For the analysis of these aspects, the concept of Actor-Centred Institutionalism offers a framework to investigate the two most important dimensions: Institutions and Actors. Institutions build the framework for actors, their constellations and modes of interactions. Actors influence the constellation, which builds the ground for modes of interaction. Interactions lead to decisions, which, after implementation, modify the situation, in which actors work and that influence the actors. This circular correlation is reflected by Wiechmann’s model for strategy development analysis. Contexts of decisions, strategic discourses, and induced and autonomous strategic behaviours of actors are fundamental to his approach. Hence, within this model it is possible to analyse preconditions for the development of a strategy and deal with the question of its (attributed) importance. In the paper I analyse in a first step the evolution of a governance arrangement for energy: starting in the 1970s with the first intercommunal City Council, via the 1990s collaborations for economic development, regeneration and revitalisation policies, reactions to the IRA bomb attack of 1996 and the bid for Olympic Summer Games 2000, to the current institutionalisations of regional governance with a special focus on renewable energy under the umbrella of a Combined Authority. In a second step I will present findings from a qualitative research. There, I focus impacts of specific actor constellations and institutional environments for the regional energy strategy. Therefor, the analysis is threefold: firstly, institutional rules for the mutual work on a regional energy strategy, secondly, strategic behaviours of actors as “mirror” for impacts of the regional governance, and thirdly, the strategic discourse within the region are reflected. The article closes with lessons learned from the studied case. Even though historic circumstances have been very important factors, several elements for the development of an energy strategy in GM can be highlighted – with regard to contexts of strategic decision-making and the role of regional institutions, organisations and actors: • a mutual view on development problems; • a shared vision for the region; • a commonly developed regional strategy; • an awareness of the need for coordination and cooperation among different policy levels; • a clear structure for development issues and • systematic institutionalizations of and rules for, e.g., cooperation, negotiations, or monetary concerns. The paper shows that city-regional collaboration can accelerate renewable energies’ adoption and help to prepare its local implementation. [less ▲]

Detailed reference viewed: 69 (0 UL)
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See detailSmart TV - Smarte Regulierung
Giurgiu, Andra UL; Metzdorf, Jenny UL

in Taeger, Jürgen (Ed.) Big Data & Co., Neue Herausforderungen für das Informationsrecht (2014)

Detailed reference viewed: 122 (11 UL)
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See detailSmartCheck: Static Analysis of Ethereum Smart Contracts
Tikhomirov, Sergei UL; Voskresenskaya, Ekaterina; Ivanitskiy, Ivan et al

Scientific Conference (2018, May 27)

Ethereum is a major blockchain-based platform for smart contracts – Turing complete programs that are executed in a decentralized network and usually manipulate digital units of value. Solidity is the ... [more ▼]

Ethereum is a major blockchain-based platform for smart contracts – Turing complete programs that are executed in a decentralized network and usually manipulate digital units of value. Solidity is the most mature high-level smart contract language. Ethereum is a hostile execution environment, where anonymous attackers exploit bugs for immediate financial gain. Developers have a very limited ability to patch deployed contracts. Hackers steal up to tens of millions of dollars from flawed contracts, a well-known example being “The DAO“, broken in June 2016. Advice on secure Ethereum programming practices is spread out across blogs, papers, and tutorials. Many sources are outdated due to a rapid pace of development in this field. Automated vulnerability detection tools, which help detect potentially problematic language constructs, are still underdeveloped in this area. We provide a comprehensive classification of code issues in Solidity and implement SmartCheck – an extensible static analysis tool that detects them. SmartCheck translates Solidity source code into an XML-based intermediate representation and checks it against XPath patterns. We evaluated our tool on a big dataset of real-world contracts and compared the results with manual audit on three contracts. Our tool reflects the current state of knowledge on Solidity vulnerabilities and shows significant improvements over alternatives. SmartCheck has its limitations, as detection of some bugs requires more sophisticated techniques such as taint analysis or even manual audit. We believe though that a static analyzer should be an essential part of contract developers’ toolbox, letting them fix simple bugs fast and allocate more effort to complex issues. [less ▲]

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See detailSmartphone-based Adaptive Driving Maneuver Detection: A large-scale Evaluation Study
Castignani, German UL; Derrmann, Thierry UL; Frank, Raphaël UL et al

in IEEE Transactions on Intelligent Transportation Systems (2017)

The proliferation of connected mobile devices together with advances in their sensing capacity has enabled a new distributed telematics platform. In particular, smartphones can be used as driving sensors ... [more ▼]

The proliferation of connected mobile devices together with advances in their sensing capacity has enabled a new distributed telematics platform. In particular, smartphones can be used as driving sensors to identify individual driver behavior and risky maneuvers. However, in order to estimate driver behavior with smartphones, the system must deal with different vehicle characteristics. This is the main limitation of existing sensing platforms, which are principally based on fixed thresholds for different sensing parameters. In this paper, we propose an adaptive driving maneuver detection mechanism that iteratively builds a statistical model of the driver, vehicle, and smartphone combination using a multivariate normal model. By means of experimentation over a test track and public roads, we first explore the capacity of different sensor input combinations to detect risky driving maneuvers, and we propose a training mechanism that adapts the profiling model to the vehicle, driver, and road topology. A large-scale evaluation study is conducted, showing that the model for maneuver detection and scoring is able to adapt to different drivers, vehicles, and road conditions. [less ▲]

Detailed reference viewed: 281 (7 UL)
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See detailSmartR: An open-source platform for interactive visual analytics for translational research data.
Herzinger, Sascha UL; Gu, Wei UL; Satagopam, Venkata UL et al

in Bioinformatics (Oxford, England) (2017)

In translational research, efficient knowledge exchange between the different fields of expertise is crucial. An open platform that is capable of storing a multitude of data types such as clinical, pre ... [more ▼]

In translational research, efficient knowledge exchange between the different fields of expertise is crucial. An open platform that is capable of storing a multitude of data types such as clinical, pre-clinical, or OMICS data combined with strong visual analytical capabilities will significantly accelerate the scientific progress by making data more accessible and hypothesis generation easier. The open data warehouse tranSMART is capable of storing a variety of data types and has a growing user community including both academic institutions and pharmaceutical companies. tranSMART, however, currently lacks interactive and dynamic visual analytics and does not permit any post-processing interaction or exploration. For this reason, we developed SmartR , a plugin for tranSMART, that equips the platform not only with several dynamic visual analytical workflows, but also provides its own framework for the addition of new custom workflows. Modern web technologies such as D3.js or AngularJS were used to build a set of standard visualizations that were heavily improved with dynamic elements. Contact: reinhard.schneider@uni.lu. Supplementary information: Supplementary data are available at Bioinformatics online. Availability: : The source code is licensed under the Apache 2.0 License and is freely available on GitHub: https://github.com/transmart/SmartR. [less ▲]

Detailed reference viewed: 240 (17 UL)
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See detailsmartvote.lu: Usage and impact of the first VAA in Luxembourg
Dumont, Patrick UL; Kies, Raphaël UL

in International Journal of Electronic Governance (2013), 5(3-4), 388-410

This paper analyses the electoral usage and impact of smartvote.lu, the first Voting Advice Application (VAA) introduced in Luxembourg at the occasion of the 2009 national elections. We devise a series of ... [more ▼]

This paper analyses the electoral usage and impact of smartvote.lu, the first Voting Advice Application (VAA) introduced in Luxembourg at the occasion of the 2009 national elections. We devise a series of expectations regarding the use and impact of the instrument and provide both descriptive and multivariate analyses on data drawn from a ‘classical’ post-electoral survey representative of all voters. Despite the need for studies using this type of empirical material and multivariate methods to draw valid lessons on the determinants of VAA use and the potential electoral impact of these devices, such a combination is still rare in the nascent literature on VAAs, and arguably allows us to make a valuable contribution to it. Our main finding is that the most educated are more likely to use the VAAs but less likely to be influenced by it. [less ▲]

Detailed reference viewed: 143 (4 UL)
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See detailSME CEOs: Do you need to access knowledge? Be an extrovert!
Geraudel, Mickaël UL

Scientific Conference (2011)

Detailed reference viewed: 32 (2 UL)
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See detailSmectic Filaments in colloidal in colloidal suspensions of rods
Schilling, Tanja UL

Scientific Conference (2003)

Detailed reference viewed: 17 (0 UL)
See detailSmectic Filaments in colloidal in colloidal suspensions of rods
Schilling, Tanja UL

Presentation (2003)

Detailed reference viewed: 18 (0 UL)
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See detailSmectic filaments in colloidal suspensions of rods
Frenkel, Daan; Schilling, Tanja UL

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2002), 66(4),

In supersaturated isotropic mixtures of hard rods, smectic filaments have recently been observed. We propose a model for formation and growth of these filaments similar to the Hoffman-Lauritzen model for ... [more ▼]

In supersaturated isotropic mixtures of hard rods, smectic filaments have recently been observed. We propose a model for formation and growth of these filaments similar to the Hoffman-Lauritzen model for polymer crystallization. Filament thickness is determined by a compromise between maximizing the amount of smectic phase formed and minimizing the nucleation barrier for adding new segments to the growing filament. We compare our analytical results to kinetic Monte Carlo simulations. [less ▲]

Detailed reference viewed: 58 (0 UL)
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See detailSMEs’ access to information: The combined effect of CEOs’ social capital and personality traits
Chollet, Barthelemy; Geraudel, Mickaël UL; Mothe, Caroline

Scientific Conference (2011)

Detailed reference viewed: 31 (0 UL)
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See detailSMEs’ access to information: The combined effect of CEOs’ social capital and personality traits
Chollet, Barthelemy; Geraudel, Mickaël UL; Mothe, Caroline

Scientific Conference (2011)

Detailed reference viewed: 18 (0 UL)
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See detail"Smoking kills” vs. “Smoking makes restless”: Effectiveness of different warning labels on smoking behavior
Glock, Sabine UL; Ritter, Simone; Engels, R. C. M. E. et al

in Psychology and Behavioral Sciences (2013), 2

Detailed reference viewed: 104 (3 UL)
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See detailSmoking related warning messages formulated as questions positively influence short-term smoking behaviour
Müller, Barbara; Ritter, Simone; Glock, Sabine UL et al

in Journal of Health Psychology (in press)

Detailed reference viewed: 145 (10 UL)
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See detailSmoking, Implicit Attitudes, and Context-Sensitivity: An Overview
Glock, Sabine UL; Pit-Ten Cate, Ineke UL

in Substance Abuse and Addiction: : Breakthroughs in Research and Practice (2019)

This chapter focuses on implicit attitudes toward smoking and provides the first systematic review of research in this domain. Implicit attitudes are suggested to guide automatic behavior, thereby playing ... [more ▼]

This chapter focuses on implicit attitudes toward smoking and provides the first systematic review of research in this domain. Implicit attitudes are suggested to guide automatic behavior, thereby playing a pivotal role for automatic processes inherent in addictive behaviors. This chapter further explores the extent to which implicit attitudes are context-sensitive. More specifically, it reviews studies that have focused on the differential effects of external cues such as warning labels and internal cues (e.g., deprivation). Results of 32 studies show that although smokers generally have more positive implicit attitudes than non-smokers, the valence of implicit attitudes varies as a result of the applied method or stimuli. Studies reveal that implicit attitudes toward smoking partly depend on external cues, especially outcome expectancies. Similarly, internal cues affect implicit attitudes whereby the level of nicotine deprivation seems vital. Implications for intervention and future research are indicated in the discussion. [less ▲]

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See detailSmoking, implicit attitudes, and context-sensitivity: An Overview
Glock, Sabine UL; Pit-Ten Cate, Ineke UL

in Jin, Z (Ed.) Exploring implicit cognition: Learning, memory, and social-cognitive processes (2014)

The focus on implicit attitudes toward smoking is relatively novel and this chapter provides the first systematic review of research in this domain. The review summarizes empirical studies focusing on ... [more ▼]

The focus on implicit attitudes toward smoking is relatively novel and this chapter provides the first systematic review of research in this domain. The review summarizes empirical studies focusing on implicit attitudes toward smoking. Implicit attitudes are suggested to guide automatic behavior, thereby playing a pivotal role for automatic processes inherent in addictive behaviors. The chapter further explores the extent to which implicit attitudes are sensitive to context. More specifically it reviews studies that have focused on the differential effects of external cues such as warning labels as well as internal cues such as deprivation. Overall 32 studies were analyzed, including studies focusing on implicit attitudes toward smoking compared to positive, negative or neutral categories; implicit attitudes in relation to situational context such as TV advertisement, warning labels and (non)smoking settings; and implicit attitudes in relation to nicotine dependence and nicotine deprivation. Results of these studies show that although smokers generally have more positive implicit attitudes than non-smokers, the valence of the implicit attitude depends on the contrasting category and hence varies as a result of the applied method or stimuli. Studies considering situational contexts revealed that implicit attitudes toward smoking are partly dependent on external cues, especially outcome expectancies. Similarly, internal cues are shown to affect implicit attitudes whereby not so much the level of nicotine dependency but more the level of nicotine deprivation seems vital. Only one study investigated the combined effect of external and internal cues on implicit attitudes toward smoking, not only highlighting the complexity of the relationships, but also the importance of considering implicit attitudes when developing and evaluating intervention. Implications for intervention and future research are indicated in the discussion. [less ▲]

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See detailA smooth family of intertwining operators
Lahiani, Raza UL; Molitor-Braun, Carine UL

in Journal of the Mathematical Society of Japan [=JMSJ] (2011), 63(1), 321-361

Detailed reference viewed: 81 (4 UL)
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See detailsmooth nodal stress in the XFEM for crack propagation simulations
Peng, Xuan; Bordas, Stéphane UL; Natarajan, Sundararajan

Scientific Conference (2013, September)

In this paper, we present a method to achive smooth nodal stresses in the XFEM without post-processing. This method was developed by borrowing ideas from ``twice interpolating approximations'' (TFEM) [1 ... [more ▼]

In this paper, we present a method to achive smooth nodal stresses in the XFEM without post-processing. This method was developed by borrowing ideas from ``twice interpolating approximations'' (TFEM) [1]. The salient feature of the method is to introduce an ``average'' gradient into the construction of the approximation, resulting in improved solution accuracy, both in the vicinity of the crack tip and in the far field. Due to the high order polynomial basis provided by the interpolants, the new approximation enhances the smoothness of the solution without requiring an increased number of degrees of freedom. This is particularly advantageous for low-order elements and in fracture mechanics, where smooth stresses are important for certain crack propagation criteria, e.g. based on maximum principal stresses. Since the new approach adopts the same mesh discretization, i.e. simplex meshes, it can be easily extended into various problems and is easily implemented. We discuss the increase in the bandwidth which is the major drawback of the present method and can be somewhat alleviated by using an element-by-element solution strategy. Numerical tests show that the new method is as robust as XFEM, considering precision, model size and post-processing time. By comparing in detail the behaviour of the method on crack propagation examples, we can conclude that for two-dimensional problems, the proposed method tends to be an efficient alternative to the classical XFEM [2][3] especially when local, stress-based propagation criteria are used. [less ▲]

Detailed reference viewed: 370 (4 UL)
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See detailThe smoothed extended finite element method for strong discontinuities
Natarajan, S.; Bordas, Stéphane UL; Rabczuk, Timon

Scientific Conference (2009, June)

Detailed reference viewed: 92 (0 UL)