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See detailValue-at-risk: A practical introduction
Schiltz, Jang UL

Conference given outside the academic context (2007)

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See detailAxiomatic characterizations of generalized values
Marichal, Jean-Luc UL; Kojadinovic, Ivan; Fujimoto, Katsushige

in Discrete Applied Mathematics (2007), 155(1), 26-43

In the framework of cooperative game theory, the concept of generalized value, which is an extension of that of value, has been recently proposed to measure the overall influence of coalitions in games ... [more ▼]

In the framework of cooperative game theory, the concept of generalized value, which is an extension of that of value, has been recently proposed to measure the overall influence of coalitions in games. Axiomatizations of two classes of generalized values, namely probabilistic generalized values and generalized semivalues, which extend probabilistic values and semivalues, respectively, are first proposed. The axioms we utilize are based on natural extensions of axioms involved in the axiomatizations of values. In the second half of the paper, special instances of generalized semivalues are also axiomatized. [less ▲]

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See detailLes activités de transport du Luxembourg dans la Grande Région
Schwartz, Deborah UL; Schuller, Guy

Article for general public (2007)

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See detailCounting non-isomorphic maximal independent sets of the n-cycle graph
Bisdorff, Raymond UL; Marichal, Jean-Luc UL

Scientific Conference (2007, January)

It is known that the number of maximal independent sets of the $n$-cycle graph $C_n$ is given by the $n$th term of the Perrin sequence. The action of the automorphism group of $C_n$ on the family of these ... [more ▼]

It is known that the number of maximal independent sets of the $n$-cycle graph $C_n$ is given by the $n$th term of the Perrin sequence. The action of the automorphism group of $C_n$ on the family of these maximal independent sets partitions this family into disjoint orbits, which represent the non-isomorphic (i.e., defined up to a rotation and a reflection) maximal independent sets. We provide exact formulas for the total number of orbits and the number of orbits having a given number of isomorphic representatives. We also provide exact formulas for the total number of unlabelled (i.e., defined up to a rotation) maximal independent sets and the number of unlabelled maximal independent sets having a given number of isomorphic representatives. It turns out that these formulas involve both Perrin and Padovan sequences. [less ▲]

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See detailLocalization signals within ataxin-3 influence the formation of intranuclear aggregates in spinocerebellar ataxia type 3
Antony, Paul UL; Boy, J; Henderson, B et al

in Aktuelle Neurologie (2007)

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See detailGlobal and Local Gravity Field Recovery from Satellite-to-Satellite Tracking
Weigelt, Matthias UL

Doctoral thesis (2007)

The main objective of this thesis is the gravity field recovery using satellite-to-satellite tracking methods. Based on new technologies like the global positioning system and accelerometers satellite-to ... [more ▼]

The main objective of this thesis is the gravity field recovery using satellite-to-satellite tracking methods. Based on new technologies like the global positioning system and accelerometers satellite-to-satellite tracking yields a dramatic improvement in the de- termination of the Earth gravity field. Two dedicated satellite missions, namely the CHAllenging Minisatellite Payload (CHAMP) and the Gravity Recovery And Climate Experiment (GRACE) are underway. This work describes the processing of the satel- lite data from CHAMP and GRACE based on the energy balance approach. The first part discusses the global gravity field recovery from CHAMP. Specifically, it aims at a reprocessing of kinematic position data and at a refinement of the data processing strategies. Although the energy balance approach is theoretically simple, its imple- mentation proved to be quite challenging. By refining the processing techniques an improvement of up to 30\% is reached for the low degree spherical harmonic coefficients. Nevertheless, the solutions still depend strongly on the variability of the groundtrack. The quality of the monthly solutions can vary up to one order of magnitude. To ad- dress this challenge, an in-depth analysis gives new insight into the phenomenon, and a new and unique combination method with GRACE data is presented, which yields a more homogeneous set of solutions and reaches the edge of the recoverability of a time-variable gravity signal from high-low satellite-to-satellite tracking missions. In the second part the energy balance approach is applied to the GRACE mission. Pre- vious attempts of expressing the kinetic energy in terms of the K-band measurement make use of an approximation. In this work, an exact representation is introduced and is validated by simulations. In the third part, the aim is to make optimal usage of the data distribution in the high latitude area. For this, interpolation and downward continuation techniques are investigated and an improvement, compared to the global solutions, is achieved. Overall, the analysis provides new and valuable insight into the data processing of satellite-to-satellite tracking data using the energy balance approach. [less ▲]

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See detailVitamin C. Biosynthesis, recycling and degradation in mammals.
Linster, Carole UL; Van Schaftingen, Emile

in FEBS Journal (2007), 274(1), 1-22

Vitamin C, a reducing agent and antioxidant, is a cofactor in reactions catalyzed by Cu(+)-dependent monooxygenases and Fe(2+)-dependent dioxygenases. It is synthesized, in vertebrates having this ... [more ▼]

Vitamin C, a reducing agent and antioxidant, is a cofactor in reactions catalyzed by Cu(+)-dependent monooxygenases and Fe(2+)-dependent dioxygenases. It is synthesized, in vertebrates having this capacity, from d-glucuronate. The latter is formed through direct hydrolysis of uridine diphosphate (UDP)-glucuronate by enzyme(s) bound to the endoplasmic reticulum membrane, sharing many properties with, and most likely identical to, UDP-glucuronosyltransferases. Non-glucuronidable xenobiotics (aminopyrine, metyrapone, chloretone and others) stimulate the enzymatic hydrolysis of UDP-glucuronate, accounting for their effect to increase vitamin C formation in vivo. Glucuronate is converted to l-gulonate by aldehyde reductase, an enzyme of the aldo-keto reductase superfamily. l-Gulonate is converted to l-gulonolactone by a lactonase identified as SMP30 or regucalcin, whose absence in mice leads to vitamin C deficiency. The last step in the pathway of vitamin C synthesis is the oxidation of l-gulonolactone to l-ascorbic acid by l-gulonolactone oxidase, an enzyme associated with the endoplasmic reticulum membrane and deficient in man, guinea pig and other species due to mutations in its gene. Another fate of glucuronate is its conversion to d-xylulose in a five-step pathway, the pentose pathway, involving identified oxidoreductases and an unknown decarboxylase. Semidehydroascorbate, a major oxidation product of vitamin C, is reconverted to ascorbate in the cytosol by cytochrome b(5) reductase and thioredoxin reductase in reactions involving NADH and NADPH, respectively. Transmembrane electron transfer systems using ascorbate or NADH as electron donors serve to reduce semidehydroascorbate present in neuroendocrine secretory vesicles and in the extracellular medium. Dehydroascorbate, the fully oxidized form of vitamin C, is reduced spontaneously by glutathione, as well as enzymatically in reactions using glutathione or NADPH. The degradation of vitamin C in mammals is initiated by the hydrolysis of dehydroascorbate to 2,3-diketo-l-gulonate, which is spontaneously degraded to oxalate, CO(2) and l-erythrulose. This is at variance with bacteria such as Escherichia coli, which have enzymatic degradation pathways for ascorbate and probably also dehydroascorbate. [less ▲]

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See detailCompliance of RIES to the proposed e-Voting protection profile
Jonker, Hugo UL; Volkamer, Melanie

in Proc. First Conference on E-Voting and Identity (VOTE-ID’07) (2007)

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See detailInterkulturelle Herausforderungen in saarländisch-lothringischen Wirtschaftsbeziehungen. Bestandsaufnahmen – Analysen – Perspektiven
Wille, Christian UL

Book published by AV Akademikerverlag (2007)

Deutschland und Frankreich sind seit den 1960er Jahren wichtige Handelspartner, wobei im Raum Saarland-Lothringen eine Verdichtung grenzüberschreitender Wirtschaftskontakte auszumachen ist. Das ... [more ▼]

Deutschland und Frankreich sind seit den 1960er Jahren wichtige Handelspartner, wobei im Raum Saarland-Lothringen eine Verdichtung grenzüberschreitender Wirtschaftskontakte auszumachen ist. Das Grenzgebiet ist Ausgangspunkt dieser Publikation, um interkulturelle Problemfelder der deutsch-französischen Wirtschaftsbeziehungen zu analysieren und adäquate Handlungsansätze zu entwickeln. Der Autor bringt zunächst Theorie und Methodik der Interkulturellen Kommunikation mit seinem empirischen Vorgehen in Verbindung und erläutert interkulturelle Herausforderungen, die Wirtschaftsstrukturen, Ausbildungssysteme, Sozialisations- und Kommunikationsstile in Deutschland und Frankreich einschließen. Auf dieser Grundlage erarbeitet er ein interkulturelles Qualifikationsprofil, das sich an den Erkenntnissen der Kooperationsforschung sowie der Internationalisierung von Berufsbildung orientiert. Weiterführend werden Möglichkeiten zur Integration des Profils in die Aus- und Weiterbildungssysteme aufgezeigt. [less ▲]

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See detailProto-industrialisation et immigration au Luxembourg
Pauly, Michel UL

in Allegrezza, Serge e.a. (Ed.) L’immigration au Luxembourg, et après? (2007)

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See detailParent-Child Value Similarity: The Role of Zeitgeist
Boehnke, Klaus; Hadjar, Andreas UL; Baier, Dirk

in Journal of Marriage and Family (2007), 69(3), 778-792

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See detailEinschnitte : Identität in der Moderne
Kohns, Oliver UL; Roussel, Martin

Book published by Königshausen & Neumann (2007)

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See detailPerformance Limitations of IEEE 802.11 Networks and Potential Enhancements
Granelli, Fabrizio; Kliazovich, Dzmitry UL; Fonseca, Nelson L. S.

in International Journal of Computer Research (2007), 14(1), 85-108

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See detailDer Beitrag der Messen und Märkte zur mittelalterlichen Integration Europas
Pauly, Michel UL

in Irsigler, Franz; Pauly, Michel (Eds.) Messen, Jahrmärkte und Stadtentwicklung in Europa (2007)

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See detailIs the instrumental drift of superconducting gravimeters a linear or exponential function of time?
Van Camp, Michel; Francis, Olivier UL

in Journal of Geodesy (2007), 81(5), 337-344

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See detailRelative Effect of Public and Private Investment on Côte d'Ivoire's Economic Performance
Aka, Bedia François UL

in Applied Econometrics and International Development (2007), 7(1), 149-156

This paper investigates the impact of public and private investment on Côte d’Ivoire’s economic performance (GDP growth) over the period 1969-2001, using an autoregressive-distributed lag (ARDL) Error ... [more ▼]

This paper investigates the impact of public and private investment on Côte d’Ivoire’s economic performance (GDP growth) over the period 1969-2001, using an autoregressive-distributed lag (ARDL) Error Correction Model (ECM). The results shows that in the short run an increase in private investment by 1% enhance economic growth by 28%, while a 1% increase in public investment leads to only 7% increase in real GDP. In the long run nevertheless the impact of public investment on GDP growth has been higher than private investment, a 1% increase in private investment leads to 25% increase in GDP, while public investment impacts growth by 37%. On the other hand, a 1% increase in employment leads to 38% increase in long run GDP growth. The main findings indicate that while the short run efficiency of public capital can be further improved in Côte d’Ivoire, in the same time the efficiency of private investment can be improved in the long run. [less ▲]

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