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See detailWechselwirkungen runder Düsenfreistrahlen mit ebenen Wänden bei verschiedenen Auftreffwinkeln
Richter, Frank; Michael, Mark UL; Leder, Alfred et al

in Leder, A.; Brede, B.; Hüttmann, F. (Eds.) et al Proceedings der 15.GALA-Fachtagung “Lasermethoden in der Strömungsmesstechnik“ (2007)

Die Ausbreitung eines runden Düsenfreistrahls bei verschiedenen Auftreffwinkeln auf eine ebene Wand wird in einem großen Wasserbecken experimentell untersucht. Die Wechsel- wirkungen zwischen Freistrahl ... [more ▼]

Die Ausbreitung eines runden Düsenfreistrahls bei verschiedenen Auftreffwinkeln auf eine ebene Wand wird in einem großen Wasserbecken experimentell untersucht. Die Wechsel- wirkungen zwischen Freistrahl und Wand werden bei den unterschiedlichen Konfigurationen anhand des mit einer tauchbaren 3D-LDA-Sonde gemessenen Strömungsfeldes charakteri- siert. Das radiale Ausbreitungsverhalten sowie der Volumenstrom über die Strahlquer- schnitte stehen dabei im Mittelpunkt der Auswertung. [less ▲]

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See detailWedge-shaped layers from porous silicon: the basics of laterally graded interference filters
Bohn, H. G.; Marso, Michel UL

in Physica Status Solidi A. Applied Research (2005), 202(8), 1437-1442

The process of making laterally graded interference filters has been reanalyzed. A simple and consistent picture arises if one applies a constant electric field perpendicular to the etch current instead ... [more ▼]

The process of making laterally graded interference filters has been reanalyzed. A simple and consistent picture arises if one applies a constant electric field perpendicular to the etch current instead of a constant current. The system is quantitatively modeled by means of a pure ohmic equivalent circuit model. [less ▲]

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See detailDer Weg ist das Ziel: Der Aufbau einer Wertpapierbörse in Vietnam
Klump, Rainer UL

in Doi Moi in Wirtschaft und Gesellschaft. Soziale und ökonomische Transformation in Vietnam (2002)

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See detailDer Weg zur Kaiserkrone Der Romzug Heinrichs VII. in der Darstellung Erzbischof Balduins von Trier
Margue, Michel UL; Pauly, Michel UL; Schmid, Wolfgang

Book published by Kliomedia GmBH (2009)

Detailed reference viewed: 50 (2 UL)
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See detailWege aus dem Rausch, Wege aus der Sucht
Sosoe, Lukas UL

in Kaufmann, Matthias (Ed.) Recht auf Rausch und Selbstverlust durch Sucht (2003)

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See detailWege zur Menschheit. Zur Diskussion von Valladodid. Zwischen Las Casas und Sepulvéda
Sosoe, Lukas UL

in Kaufmann, Matthias; Schnepf, Robert (Eds.) Politische Metaphyisik (2005)

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See detailWege zur Sozialen Marktwirtschaft – Die Entwicklung ordnungspolitischer Konzeptionen in Deutschland vor der Währungsreform
Klump, Rainer UL

in Streissler, E. W. (Ed.) Studien zur Entwicklung der ökonomischen Theorie XVI: Die Umsetzung wirtschaftspolitischer Grundkonzeptionen in die kontinentaleuropäische Praxis des 19. und 20. Jahrhunderts (1997)

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See detailWEHIA
Neugebauer, Tibor UL

Presentation (2015)

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See detailWéi ensteet d`Zuel 10 an eisem Kapp?
Schiltz, Christine UL

Conference given outside the academic context (2013)

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See detailWeight Loss Aassociated With Socioeconomic Status in Patients With Angina Pectoris, 5 Yeras After and Angiography
Tchicaya, Anastase; Baumann, Michèle UL

in Cardiology (2015), (132 (104)), 60

The aim of the study is to assess the association between weight loss and socioeconomic status (SES) in patients with cardiovascular disease (CVD) such as angina pectoris. Method: In 2013-2014, 1,873 ... [more ▼]

The aim of the study is to assess the association between weight loss and socioeconomic status (SES) in patients with cardiovascular disease (CVD) such as angina pectoris. Method: In 2013-2014, 1,873 patients out of 4,391 that had undergone an angiography in 2008- 2009 participated in a follow-up study. Among these patients, 457 suffered from angina pectoris and were obese or overweight at baseline. A self-administered questionnaire was completed. Moderate weight loss was defined as the loss of 5%-10%, severe weigh loss as more than 10% of baseline weight. Household-income was used as proxy for SES. Logistic regression was applied to assess the association between weight loss and SES. Results: During the reference period, 28% of the participants lost weight. A moderate weight loss was higher in patients with a household income between 3000€ and 4500€ per month (OR: 2.3; CI 95%: 1.0-5.2) and higher than 4500€ per month (OR: 3.0; CI 95%: 1.3-7.2) compared to the lowest income group (less than 3000€ per month). A severe weight loss was not associated with income. However, a severe weight loss was higher for retired patients (OR: 4.3; CI 95%: 1.1- 17.0) compared to non-retired. Conclusion: The potential reduction of health inequality by an elimination of social inequalities in weight loss among patients with angina pectoris might be substantial. Moderate weight loss in overweight patients with angina pectoris at baseline could be associated with household income. Intervention strategies in secondary prevention should address these social inequalities in order to support equity in health. [less ▲]

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See detailWeight loss associated with socioeconomic status in patients with angina pectoris, 5 years after an angiography
Tchicaya, Anastase; Baumann, Michèle UL

in Cardiology (2015), (132 (suppl 1)), 60

The aim of the study is to assess the association between weight loss and socioeconomic status (SES) in patients with cardiovascular disease (CVD) such as angina pectoris. Method:In 2013-2014, 1,873 ... [more ▼]

The aim of the study is to assess the association between weight loss and socioeconomic status (SES) in patients with cardiovascular disease (CVD) such as angina pectoris. Method:In 2013-2014, 1,873 patients out of 4,391 that had undergone an angiography in 2008 -2009 participated in a follow-up study. Among these patients, 457 suffered from angina pectoris and were obese or overweight at baseline. A self-administered questionnaire was completed. Moderate weight loss was defined as the loss of 5%-10%, severe weigh loss as more than 10 % of baseline weight. Household-income was used as proxy for SES. Logistic regression was applied to assess the association between weight loss and SES. Results:During the reference period, 28% of the participants lost weight. A moderate weight loss was higher in patients with a household income between 3000€ and 4500€ per month (OR: 2.3; CI 95%: 1.0-5.2) and higher than 4500€ per month (OR: 3.0; CI 95%: 1.3-7.2) compared to the lowest income group (less than 3000€ per month). A severe weight loss was not associated with income. However, a severe weight loss was higher for retired patients (OR: 4.3; CI 95%: 1.1-17.0) compared to non-retired.Conclusion: The potential reduction of health inequality by an elimination of social inequalities in weight loss among patients with angina pectoris might be substantial. Moderate weight loss in overweight patients with angina pectoris at baseline could be associated with household income. Intervention strategies in secondary prevention should address these social inequalities in order to support equity in health. [less ▲]

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See detailWeighted Banzhaf interaction indexes and weighted least squares
Marichal, Jean-Luc UL; Mathonet, Pierre UL

Scientific Conference (2010, January)

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See detailWeighted Banzhaf power and interaction indexes through weighted approximations of games
Marichal, Jean-Luc UL; Mathonet, Pierre UL

in Dubois, Didier; Grabisch, Michel; Mesiar, Radko (Eds.) et al 32nd Linz Seminar on Fuzzy Set Theory (LINZ 2011) - Decision Theory: Qualitative and Quantitative Approaches (2011)

In cooperative game theory, various kinds of power indexes are used to measure the influence that a given player has on the outcome of the game or to define a way of sharing the benefits of the game among ... [more ▼]

In cooperative game theory, various kinds of power indexes are used to measure the influence that a given player has on the outcome of the game or to define a way of sharing the benefits of the game among the players. The best known power indexes are due to Shapley [15,16] and Banzhaf [1,5] and there are many other examples of such indexes in the literature. When one is concerned by the analysis of the behavior of players in a game, the information provided by power indexes might be far insufficient, for instance due to the lack of information on how the players interact within the game. The notion of interaction index was then introduced to measure an interaction degree among players in coalitions; see [13,12,7,8,14,10,6] for the definitions and axiomatic characterizations of the Shapley and Banzhaf interaction indexes as well as many others. In addition to the axiomatic characterizations the Shapley power index and the Banzhaf power and interaction indexes were shown to be solutions of simple least squares approximation problems (see [2] for the Shapley index, [11] for the Banzhaf power index and [9] for the Banzhaf interaction index). We generalize the non-weighted approach of [11,9] by adding a weighted, probabilistic viewpoint: A weight w(S) is assigned to every coalition S of players that represents the probability that coalition S forms. The solution of the weighted least squares problem associated with the probability distribution w was given in [3,4] in the special case when the players behave independently of each other to form coalitions. In this particular setting we introduce a weighted Banzhaf interaction index associated with w by considering, as in [11,9], the leading coefficients of the approximations of the game by polynomials of specified degrees.We then study the most important properties of these weighted indexes and their relations with the classical Banzhaf and Shapley indexes. [less ▲]

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See detailWeighted Banzhaf power and interaction indexes through weighted approximations of games
Marichal, Jean-Luc UL; Mathonet, Pierre UL

in European Journal of Operational Research (2011), 211(2), 352-358

The Banzhaf power index was introduced in cooperative game theory to measure the real power of players in a game. The Banzhaf interaction index was then proposed to measure the interaction degree inside ... [more ▼]

The Banzhaf power index was introduced in cooperative game theory to measure the real power of players in a game. The Banzhaf interaction index was then proposed to measure the interaction degree inside coalitions of players. It was shown that the power and interaction indexes can be obtained as solutions of a standard least squares approximation problem for pseudo-Boolean functions. Considering certain weighted versions of this approximation problem, we define a class of weighted interaction indexes that generalize the Banzhaf interaction index. We show that these indexes define a subclass of the family of probabilistic interaction indexes and study their most important properties. Finally, we give an interpretation of the Banzhaf and Shapley interaction indexes as centers of mass of this subclass of interaction indexes. [less ▲]

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See detailWeighted Fair Multicast Multigroup Beamforming Under Per-antenna Power Constraints
Christopoulos, Dimitrios UL; Chatzinotas, Symeon UL; Ottersten, Björn UL

in Multicast multigroup beamforming under per-antenna power constraints (2014, June)

Linear precoding exploits the spatial degrees of freedom offered by multi-antenna transmitters to serve multiple users over the same frequency resources. The present work focuses on simultaneously serving ... [more ▼]

Linear precoding exploits the spatial degrees of freedom offered by multi-antenna transmitters to serve multiple users over the same frequency resources. The present work focuses on simultaneously serving multiple groups of users, each with its own channel, by transmitting a stream of common symbols to each group. This scenario is known as physical layer multicasting to multiple co-channel groups. Extending the current state of the art in multigroup multicasting, the practical constraint of a maximum permitted power level radiated by each antenna is tackled herein. The considered per antenna power constrained system is optimized in a maximum fairness sense. In other words, the optimization aims at favoring the worst user by maximizing the minimum rate. This Max-Min Fair criterion is imperative in multicast systems, where the performance of all the receivers listening to the same multicast is dictated by the worst rate in the group. An analytic framework to tackle the Max-Min Fair multigroup multicasting scenario under per antenna power constraints is therefore derived. Numerical results display the accuracy of the proposed solution and provide insights to the performance of a per antenna power constrained system. [less ▲]

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See detailWeighted Fair Multicast Multigroup Beamforming under Per-antenna Power Constraints
Christopoulos, Dimitrios UL; Chatzinotas, Symeon UL; Ottersten, Björn UL

in Signal Processing, IEEE Transactions on (2014), 62(19), 5132-5142

A multi-antenna transmitter that conveys independent sets of common data to distinct groups of users is considered. This model is known as physical layer multicasting to multiple co-channel groups. In ... [more ▼]

A multi-antenna transmitter that conveys independent sets of common data to distinct groups of users is considered. This model is known as physical layer multicasting to multiple co-channel groups. In this context, the practical constraint of a maximum permitted power level radiated by each antenna is addressed. The per-antenna power constrained system is optimized in a maximum fairness sense with respect to predetermined quality of service weights. In other words, the worst scaled user is boosted by maximizing its weighted signal-to-interference plus noise ratio. A detailed solution to tackle the weighted max-min fair multigroup multicast problem under per-antenna power constraints is therefore derived. The implications of the novel constraints are investigated via prominent applications and paradigms. What is more, robust per-antenna constrained multigroup multicast beamforming solutions are proposed. Finally, an extensive performance evaluation quantifies the gains of the proposed algorithm over existing solutions and exhibits its accuracy over per-antenna power constrained systems. [less ▲]

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See detailWeighted Group Algebras on Groups of Polynomial Growth
Fendler, Gero; Gröchenig, Karlheinz; Leinert, Michael et al

in Mathematische Zeitschrift (2003), 245(4), 791-821

Detailed reference viewed: 17 (1 UL)