References of "2009"
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See detailClean-Growth Opportunities for Southeast Asia
Wong, Catherine UL

Article for general public (2009)

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See detailThe project GeoGebraPrim - GeoGebra for Primary School
Kreis, Yves UL

Scientific Conference (2009, November 14)

S'adjunta un article que presenta el projecte GeoGebraPrim – GeoGebra for Primary School, una recerca finançada per la University of Luxembourg. Es dóna una ullada ràpida al projecte, s'expliquen els ... [more ▼]

S'adjunta un article que presenta el projecte GeoGebraPrim – GeoGebra for Primary School, una recerca finançada per la University of Luxembourg. Es dóna una ullada ràpida al projecte, s'expliquen els conceptes didàctics i tecnològics que s'hi incorporen, així com l'establiment d'uns grups-classe de control i uns altres grups per a l'estudi pròpiament dit, es comenten el pre-test i el post-test que es faran en connexió amb el treball amb GeoGebra i es presenten els primers resultats de l'estudi. [less ▲]

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See detailHow to measure complex problem solving: Ideas, approach & software
Greiff, Samuel UL

Presentation (2009, November 11)

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See detailBerezin-Toeplitz quantization of moduli spaces
Schlichenmaier, Martin UL

Presentation (2009, November 06)

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See detailReport on Implementations of the Common File Format
Hendriks, Maxim; Kortenkamp, Ulrich; Kreis, Yves UL et al

Report (2009)

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See detailDynamic context logic and its application to norm change
Aucher, Guillaume UL; Grossi, Davide; Herzig, Andreas et al

in Proceedings of Dagstuhl Seminar (2009, November 03), 09121

Building on a simple modal logic of context, the paper presents a dynamic logic characterizing operations of contraction and expansion on theories. We investigate the mathematical properties of the logic ... [more ▼]

Building on a simple modal logic of context, the paper presents a dynamic logic characterizing operations of contraction and expansion on theories. We investigate the mathematical properties of the logic, and use it to develop an axiomatic and semantic analysis of norm change in normative systems. The proposed analysis advances the state of the art by providing a formal semantics of norm-change which, at the same time, takes into account several different aspects of the phenomenon, such as permission and obligation dynamics, as well as the dynamics of classificatory rules. [less ▲]

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See detailWho chooses what in the game store? The relationship between game preferences and dimensions of aggression
Happ, Christian UL; Melzer, André UL; Rossi, M. et al

Scientific Conference (2009, November)

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See detailEen hele kleine plek in Afrika
Juffermans, Kasper UL

Article for general public (2009)

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See detailLes risques de devenir chômeur de longue durée
Houssemand, Claude UL

Scientific Conference (2009, November)

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See detailStable Robust Adaptive Controller and Observer Design for a Class of SISO Nonlinear Systems with Unknown Dead Zone
Jasim, Ibrahim UL

in 2009 International Conference on Control and Automation (2009, November)

This paper presents a new stable robust adaptive controller and observer design for a class of nonlinear systems that contain i. coupling of unmeasured states and unknown parameters ii. unknown dead zone ... [more ▼]

This paper presents a new stable robust adaptive controller and observer design for a class of nonlinear systems that contain i. coupling of unmeasured states and unknown parameters ii. unknown dead zone at the system actuator. The system is firstly cast into a modified form in which the observer and parameter estimation become feasible. Then a stable robust adaptive controller, state observer, parameter update laws are derived that would provide global adaptive system stability and desirable performance. To validate the approach, simulation was performed to a single-link mechanical system with a dynamic friction model and unknown dead zone exists at the system actuation. Then a comparison is presented with the results when there is no dead zone at the system actuation. [less ▲]

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See detailEnergy-efficient spectrum sensing for cognitive sensor networks
Maleki, Sina UL; Pandharipande, Ashish; Leus, Geert

in 35th Annual Conference of IEEE Industrial Electronics, 2009. IECON '09 (2009, November)

We consider a combined sleeping and censoring scheme for energy-efficient spectrum sensing in cognitive sensor networks. We analyze the detection performance of this scheme by theoretically deriving the ... [more ▼]

We consider a combined sleeping and censoring scheme for energy-efficient spectrum sensing in cognitive sensor networks. We analyze the detection performance of this scheme by theoretically deriving the global probabilities of detection and false-alarm. Our goal is to minimize the energy consumption incurred in distributed sensing, given constraints on the global probabilities of detection and false-alarm, by optimally designing the sleeping rate and the censoring thresholds. Using specific transceiver models for sensors based on IEEE 802.15.4/ZigBee, we show the energy savings achieved under an optimum choice of the design parameters. [less ▲]

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See detailStudents in Anger - How do teachers' provocations influence anger regulation?
Germar, M.; Steffgen, Georges UL

Poster (2009, November)

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See detailLehrerausbildung: Von der notwendigen Entwicklung klinischer Kompetenzen bei Referendaren
Weber, Jean-Marie UL

Scientific Conference (2009, November)

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See detailOn monopolistic competition and optimal product diversity: workers' rents also matter
Picard, Pierre M. UL; Toulemonde, Eric

in Canadian Journal of Economics (2009), 42(4), 1347-1360

In the Dixit-Stiglitz model of monopolistic competition, entry of rms is socially too small. Other authors have shown that excess entry is also a possibility with other preferences for diversity. We show ... [more ▼]

In the Dixit-Stiglitz model of monopolistic competition, entry of rms is socially too small. Other authors have shown that excess entry is also a possibility with other preferences for diversity. We show that workers rents also contribute to explain excess entry through a general equilibrium mechanism. Larger wages indeed raises the aggregate earnings and rms sales and pro ts, which entices too many rms to enter. We discuss the possibility of over-provision of varieties by comparing the equilibrium to unconstrained and constrained social optima and to other regulatory framework where wages are not controlled. [less ▲]

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See detailThe Causes and Mechanisms of Historical Dike Failures in the Netherlands
Van Baars, Stefan UL; Van Kempen, I.M.

in E-water (2009)

In a historical perspective, flood protection in the past was not given high priority - plague and periods of famine and war took precedence. Poverty and a lack of knowledge made it difficult to create ... [more ▼]

In a historical perspective, flood protection in the past was not given high priority - plague and periods of famine and war took precedence. Poverty and a lack of knowledge made it difficult to create safer dikes. Dike engineering did improve in Napoleonic era due to the French Central Government, but many dikes still failed. A historical overview of the causes and mechanisms of dike failures in the Netherlands has been drawn up, and resulted in a list of 337 recorded events leading to an assumed total of 1735 dike failures in the Netherlands between 1134 and 2006. Storm surges were, generally speaking, the primary cause of dike failure, followed by high water and ice drift. Two-thirds of all dikes failed as a result of the inner slope protection or the crest of the dike being eroded. The main causes for this were run-over and wave overflow, which could have been prevented, had the dikes been higher. The second cause of dike failure was ice drift. All other mechanisms were of minor importance, but were in the past either difficult to determine or even know about. [less ▲]

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See detailAngstsensitivität in einer Längsschnittuntersuchung bei Patienten eines interdisziplinären Schlaflabors
Blenn, J.; Kemper, Christoph UL; Specht, M. et al

Poster (2009, November)

Detailed reference viewed: 57 (0 UL)