Institution
University of Luxembourg
Education•Luxembourg, Luxembourg•
About: University of Luxembourg is a education organization based out in Luxembourg, Luxembourg. It is known for research contribution in the topics: Context (language use) & Computer science. The organization has 4744 authors who have published 22175 publications receiving 381824 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors investigated the impact of R&D subsidies on investment during the past financial crisis and found that the additionality effect induced by public support was smaller than in other years, which may be caused by an altered innovation subsidy scheme in crisis years or by a different innovation investment behavior of the subsidy recipients.
113 citations
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TL;DR: It is suggested that sodium promotes indium and gallium intragrain diffusion, while it hinders intergrain diffusion by segregating at grain boundaries, and the deeper understanding of dopant-mediated atomic diffusion mechanisms should lead to more effective chemical and electrical passivation strategies, and more efficient solar cells.
Abstract: Copper indium gallium diselenide-based technology provides the most efficient solar energy conversion among all thin-film photovoltaic devices. This is possible due to engineered gallium depth gradients and alkali extrinsic doping. Sodium is well known to impede interdiffusion of indium and gallium in polycrystalline Cu(In,Ga)Se2 films, thus influencing the gallium depth distribution. Here, however, sodium is shown to have the opposite effect in monocrystalline gallium-free CuInSe2 grown on GaAs substrates. Gallium in-diffusion from the substrates is enhanced when sodium is incorporated into the film, leading to Cu(In,Ga)Se2 and Cu(In,Ga)3Se5 phase formation. These results show that sodium does not decrease per se indium and gallium interdiffusion. Instead, it is suggested that sodium promotes indium and gallium intragrain diffusion, while it hinders intergrain diffusion by segregating at grain boundaries. The deeper understanding of dopant-mediated atomic diffusion mechanisms should lead to more effective chemical and electrical passivation strategies, and more efficient solar cells.
113 citations
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TL;DR: In this paper, the authors examined the effect of curricular and extracurricular activities on the entrepreneurial motivation and competences of university students and found that such activities generate positive attitudes for entrepreneurship but at the same time they lower capacity and intention to start a business.
Abstract: This paper examines the effect of curricular and extracurricular activities on the entrepreneurial motivation and competences of university students. In order to address these issues, the authors have used Ajzen's model of planned behaviour, including curricular and extracurricular activities, analysing their effect on university students’ attitude and behavioural control and their entrepreneurial intention as well as competences. Using a convenience sample of university students, we chose two Spanish institutions, with a total sample size of 1475 students. The analysis demonstrates the effects of curricular and extracurricular activities on the entrepreneurial intention of university students. Such activities generate positive attitudes for entrepreneurship but at the same time they lower capacity and intention to start a business. Similarly, the study shows the different effects of such variables on the competencies for entrepreneurship. Strategic and methodological implications of these results are dis...
113 citations
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TL;DR: In this article, the superior transport and lifetime properties of Cu-rich chalcopyrite semiconductors are discussed and the reason why solar cells are made from Cu-poor absorbers in spite of their inferior properties is the CdS/absorber interface which leads to high recombination in the case of Curich absorbers.
112 citations
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TL;DR: In this paper, the authors show that combining Tor and Bitcoin creates an attack vector for the deterministic and stealthy man-in-the-middle attacks, and they show how an attacker can fingerprint users and then recognize them and learn their IP address when they decide to connect to the Bitcoin network directly.
Abstract: Bitcoin is a decentralized P2P digital currency in which coins are generated by a distributed set of miners and transaction are broadcasted via a peer-to-peer network. While Bitcoin provides some level of anonymity (or rather pseudonymity) by encouraging the users to have any number of random-looking Bitcoin addresses, recent research shows that this level of anonymity is rather low. This encourages users to connect to the Bitcoin network through anonymizers like Tor and motivates development of default Tor functionality for popular mobile SPV clients. In this paper we show that combining Tor and Bitcoin creates an attack vector for the deterministic and stealthy man-in-the-middle attacks. A low-resource attacker can gain full control of information flows between all users who chose to use Bitcoin over Tor. In particular the attacker can link together user's transactions regardless of pseudonyms used, control which Bitcoin blocks and transactions are relayed to the user and can \ delay or discard user's transactions and blocks. In collusion with a powerful miner double-spending attacks become possible and a totally virtual Bitcoin reality can be created for such set of users. Moreover, we show how an attacker can fingerprint users and then recognize them and learn their IP address when they decide to connect to the Bitcoin network directly.
112 citations
Authors
Showing all 4893 results
Name | H-index | Papers | Citations |
---|---|---|---|
Jun Wang | 166 | 1093 | 141621 |
Leroy Hood | 158 | 853 | 128452 |
Andreas Heinz | 108 | 1078 | 45002 |
Philippe Dubois | 101 | 1098 | 48086 |
John W. Berry | 97 | 351 | 52470 |
Michael Müller | 91 | 333 | 26237 |
Bart Preneel | 82 | 844 | 25572 |
Bjorn Ottersten | 81 | 1058 | 28359 |
Sander Kersten | 79 | 246 | 23985 |
Alexandre Tkatchenko | 77 | 271 | 26863 |
Rudi Balling | 75 | 238 | 19529 |
Lionel C. Briand | 75 | 380 | 24519 |
Min Wang | 72 | 716 | 19197 |
Stephen H. Friend | 70 | 184 | 53422 |
Ekhard K. H. Salje | 70 | 581 | 19938 |