References of "2014"
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See detailHolistic, Autonomic, and Energy-aware Resource Allocation in Cloud Computing
Guzek, Mateusz UL

Doctoral thesis (2014)

Detailed reference viewed: 175 (23 UL)
See detailRisk Taking , Religiosity and Denomination Heterogeneity
Li, Jian UL

Presentation (2014, December 04)

In this paper, I have merged the European Social Survey, World Values Survey and Eurostat (European Statistics Information) into SHARE (Survey of Health, Aging and Retirement in Europe) by regional ... [more ▼]

In this paper, I have merged the European Social Survey, World Values Survey and Eurostat (European Statistics Information) into SHARE (Survey of Health, Aging and Retirement in Europe) by regional geographical cell (NUTS2). By using this specific merged data set, I have evaluated the effect of household level religiosity and regional denomination heterogeneity (Catholic/Protestant ratio) on household risk preference. The finding is as follows : the higher the level of religious belief the lower the risk-taking incentive the households have; however, for regional denomination heterogeneity, the higher the regional Catholic/Protestant ratio, the more popular the local risk-taking incentive prevails. [less ▲]

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See detailNichtheterosexuelle Elternschaft: Forschungsfelder und Befunde
Niepel, Christoph UL

Presentation (2014, December 04)

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See detailGreat Expectations: The Persistent Effect of Institutions on Culture
Litina, Anastasia UL

Presentation (2014, December 04)

This research exploits the event of immigration to establish that institutions have a persistent effect on culture. It is argued that immigrants coming from corrupt countries, tend to overtrust the ... [more ▼]

This research exploits the event of immigration to establish that institutions have a persistent effect on culture. It is argued that immigrants coming from corrupt countries, tend to overtrust the institutions at the host country. This inflated trust of immigrants is documented as the Great Expectations effect. This result is interesting and intriguing for several reasons. First, it highlights the persistent effect of institutions (at the origin country) on the cultural attitudes of immigrants. Interestingly, this effect is rather persistent and can be detected even to the second generation immigrants. Second, the analysis explores whether mean attitudes at the origin country have an effect on immigrants' attitude. The findings suggest that mean attitudes do not confer a statistically significant effect, whereas a horserace between origin institutions and origin culture suggests that it is the effect of institutions that prevails. Last, the analysis establishes that the inflated trust of immigrants affects their political attitudes. Immigrants coming from corrupt countries tend to be less interested in politics, to overtrust the host governments and to be less active in the political arena. In a globalized world where international immigration is rather extensive, pinning down the cultural differences across immigrants and thus the differences in their political attitudes is of an essence. [less ▲]

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See detailFeasibility of Positive Secrecy Rate in Wiretap Interference Channels
Kalantari, Ashkan UL; Maleki, Sina UL; Zheng, Gan et al

in IEEE Global Conference on Signal and Information Processing (GlobalSIP) (2014, December 03)

Interference usually is an adverse phenomenon in wireless networks. However, the interference can potentially be used to boost the secrecy rate in wireless interference channels. This work studies the ... [more ▼]

Interference usually is an adverse phenomenon in wireless networks. However, the interference can potentially be used to boost the secrecy rate in wireless interference channels. This work studies the secrecy rate in a two-user interference network where unintended user may overhear one of the users, namely user 1. User 1 tunes its transmission power in order to maximize its secrecy rate as well as to maintain the quality of service at the other user’s destination, user 2, while both user’s power limits are considered. It is demonstrated that achieving a positive secrecy rate for user 1 only depends on the channel conditions and user 2’s transmission power. Consequently, depending on the channel conditions, the exact threshold for user 2’s transmission power which leads to a positive secrecy rate for user 1 is derived. [less ▲]

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See detailExample-Dependent Cost-Sensitive Logistic Regression for Credit Scoring
Correa Bahnsen, Alejandro UL; Aouada, Djamila UL; Ottersten, Björn UL

in 2014 13th International Conference on Machine Learning and Applications (2014, December 03)

Several real-world classification problems are example-dependent cost-sensitive in nature, where the costs due to misclassification vary between examples. Credit scoring is a typical example of cost ... [more ▼]

Several real-world classification problems are example-dependent cost-sensitive in nature, where the costs due to misclassification vary between examples. Credit scoring is a typical example of cost-sensitive classification. However, it is usually treated using methods that do not take into account the real financial costs associated with the lending business. In this paper, we propose a new example-dependent cost matrix for credit scoring. Furthermore, we propose an algorithm that introduces the example-dependent costs into a logistic regression. Using two publicly available datasets, we compare our proposed method against state-of-the-art example-dependent cost-sensitive algorithms. The results highlight the importance of using real financial costs. Moreover, by using the proposed cost-sensitive logistic regression, significant improvements are made in the sense of higher savings. [less ▲]

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See detailSpatial Multiplexing in Optical Feeder Links for High Throughput Satellites
Gharanjik, Ahmad UL; Liolis, Konstantinos; Shankar, Bhavani UL et al

in Spatial Multiplexing in Optical Feeder Links for High Throughput Satellites (2014, December 02)

Optical feeder links are an attractive alternative to the RF feeder links in satellite communications (SatCom). In this paper, we present initial results from an optical feeder link study. We discuss the ... [more ▼]

Optical feeder links are an attractive alternative to the RF feeder links in satellite communications (SatCom). In this paper, we present initial results from an optical feeder link study. We discuss the architecture of a geostationary earth orbit (GEO) satellite system based on optical feeder links. To mitigate the effects of cloud coverage, which is the main availability-limiting factor, Optical Ground Station (OGS) diversity is employed. Moreover, a spatial multiplexing scheme is considered. Assuming an ON-OFF channel model, the number of required OGSs to ensure availability and throughput requirements is analyzed [less ▲]

Detailed reference viewed: 251 (21 UL)
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See detailLie superalgebras of Krichever-Novikov type
Schlichenmaier, Martin UL

Scientific Conference (2014, December 02)

Detailed reference viewed: 82 (2 UL)
See detailThe inverse Galois problem, tame ramification and abelian varieties
Arias De Reyna Dominguez, Sara UL

Presentation (2014, December 02)

Detailed reference viewed: 39 (0 UL)
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See detailDigestion of grass silage in a semi-continuously fed reactor at increasing loading rates - Process stability and kinetics evaluatio
Benito Martin, Patricia Cristina UL; Greger, Manfred UL; Schlienz, Markus UL

in Venice 2014 5th International Symposium on Energy from Biomass and Waste Proceedings (2014, December 01)

Grass is a popular substrate in agricultural biogas plants in Central and Northern Europe. There is currently limited information about the impact of the organic loading rates (OLR) on methane yields ... [more ▼]

Grass is a popular substrate in agricultural biogas plants in Central and Northern Europe. There is currently limited information about the impact of the organic loading rates (OLR) on methane yields, process stability and kinetics for continuous systems digesting grass silage. Anaerobic mono-digestion of grass silage was evaluated in semi-continuously fed laboratory continuously stirred tank reactors (CSTRs) at increasing loading rates between 1.9 and 4.7gVS/l/d. Results show that digestion of grass silage in one-stage CSTR is feasible and do not present any loading-induced inhibition for the tested OLR range. While the volumetric methane production experienced an increase of 61%, the methane yield only decreased by 13% for the highest OLR. On the other hand, the estimated first-order hydrolysis constant decreased by 24% when increasing the loading from 1.9 to 4.7gVS/l/d, which related with an accumulation of the organic material in the reactor. It was also found that the composition of the grass silage affected the digester performance significantly. [less ▲]

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See detailSolution of Two-dimensional Linear and Nonlinear Unsteady Schrödinger Equation using “Quantum Hydrodynamics” Formulation with a MLPG Collocation Method
Loukopoulos, Vassilios; Bourantas, Georgios UL

in Computer Modeling in Engineering and Sciences (2014), 103(1), 49-70

A numerical solution of the linear and nonlinear time-dependent Schrödinger equation is obtained, using the strong form MLPG Collocation method. Schrödinger equation is replaced by a system of coupled ... [more ▼]

A numerical solution of the linear and nonlinear time-dependent Schrödinger equation is obtained, using the strong form MLPG Collocation method. Schrödinger equation is replaced by a system of coupled partial differential equa tions in terms of particle density and velocity potential, by separating the real and imaginary parts of a general solution, called a quantum hydrodynamic (QHD) equa tion, which is formally analogous to the equations of irrotational motion in a classical fluid. The approximation of the field variables is obtained with the Moving Least Squares (MLS) approximation and the implicit Crank-Nicolson scheme is used for time discretization. For the two-dimensional nonlinear Schrödinger equation, the lagging of coefficients method has been utilized to eliminate the non-linearity of the corresponding examined problem. A Type-I nodal distribution is used in order to provide convergence for the discrete Laplacian operator used at the governing equation. Numerical results are validated, comparing them with analyti cal and numerical solutions. [less ▲]

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See detailEducação de Jovens e Adultos em Portugal e no Brasil: Políticas, Práticas e Atores
Alves, Natália; Rummert, Sonia; Marques, Marcelo UL

Book published by IEUL (2014)

Detailed reference viewed: 46 (0 UL)
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See detailAPI Document Quality for Resolving Deprecated APIs
Ko, Deokyoon; Ma, Kyeongwook; Park, Sooyong et al

Scientific Conference (2014, December 01)

Detailed reference viewed: 234 (11 UL)
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See detailThe Geographical Origins of Early State Formation
Litina, Anastasia UL

Presentation (2014, December 01)

This research theoretically and empirically advances the hypothesis that in early stages of development, land and climatic variability had a persistent beneficial effect on the advent of early statehood ... [more ▼]

This research theoretically and empirically advances the hypothesis that in early stages of development, land and climatic variability had a persistent beneficial effect on the advent of early statehood. A high degree of land and climatic diversity, and its association with potential gains from trade, accentuated the incentives to develop social, political and physical infrastructure that could facilitate interregional interaction. Hence, the emergence of states was expedited in more diverse geographical environments. To explore the hypotheses the analysis exploits exogenous sources of variation in a) the measure of land variability across countries, and b) climatic variability within countries over the period 500-1500 CE. The research establishes that i) the advent of statehood was expedited in regions characterized by a higher degree of variability in land and climatic conditions, ii) the effect of (land and climatic) variability on statehood operates partly through the advancement of technologies associated with trade, thus suggesting that it is the pivotal role of states in facilitating trade that ultimately contributed to their emergence and consolidation, and, iii) the effect of land variability on statehood dissipates over time. [less ▲]

Detailed reference viewed: 182 (7 UL)
See detailDi verso in verso. La poesia italiana in Lussemburgo 2012-2014
Cicotti, Claudio UL; Cuoghi, Sibilla; Neri, Francesco

Book published by COD (2014)

Detailed reference viewed: 65 (0 UL)
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See detailBluetooth Low Energy for Inter-Vehicular Communications
Bronzi, Walter UL; Frank, Raphaël UL; Castignani, German UL et al

in 2014 IEEE Vehicular Networking Conference (VNC) (2014, December)

Bluetooth Low Energy (BLE) is quickly and steadily gaining importance for a wide range of applications. In this paper we investigate the potential of BLE in a vehicular context. By means of experiments ... [more ▼]

Bluetooth Low Energy (BLE) is quickly and steadily gaining importance for a wide range of applications. In this paper we investigate the potential of BLE in a vehicular context. By means of experiments, we first evaluate the characteristics of the wireless channel, then we define a set of driving scenarios to analyze how BLE is affected by varying speed, distance and traffic conditions. We that found the maximum communication range between two devices can go beyond 100 meters and that a robust connection can be achieved up to a distance of 50 meters even for varying traffic and driving conditions. Next, we present a proof-of-concept mobile application for off-the-shelf smartphones that can be used to transmit data over multiple hops. Finally we discuss the advantages and limitations of BLE for Inter-Vehicular Communications (IVC) and propose potential applications. [less ▲]

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See detailDemo: A Recommendation Based Driver Assistance System to Mitigate Vehicular Traffic Shock Waves
Frank, Raphaël UL; Forster, Markus UL

in 2014 IEEE Vehicular Networking Conference (VNC) (2014, December)

Detailed reference viewed: 153 (5 UL)
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See detailPsychologie in Luxemburg - Ein Handbuch
Steffgen, Georges UL; Michaux, Gilles UL; Ferring, Dieter UL

Book published by University of Luxembourg/Société Luxembourgeoise de Psychologie A.s.b.l. - Editions Guy Binsfeld (2014)

Psychologie in Luxemburg: Ein Handbuch stellt das Fachgebiet der Psychologie in seinen vielfältigen Facetten vor. Neben dem Blick auf die historische Entwicklung des Fachs und der Beschreibung der ... [more ▼]

Psychologie in Luxemburg: Ein Handbuch stellt das Fachgebiet der Psychologie in seinen vielfältigen Facetten vor. Neben dem Blick auf die historische Entwicklung des Fachs und der Beschreibung der nationalen Psychologenverbände liefert das Buch einen umfassenden Ueberblick der aktuellen Anwendungsfelder sowie der schulischen und universitären Aus- und Weiterbildung in Psychologie. Vervollständigt wird das Handbuch durch die Darstellung der international vernetzten, wissenschaftlichen psychologischen Forschung in Luxemburg. Das Handbuch erlaubt es, sich ein fundiertes Bild über die vielfältigen aktuellen Angebote der Psycholgie in Luxemburg zu verschaffen. [less ▲]

Detailed reference viewed: 216 (32 UL)