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See detailQ wie Quasi und Quer
Heimböckel, Dieter UL

Article for general public (2012)

Detailed reference viewed: 44 (0 UL)
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See detailQ&A with Data Scientists: Christopher Schommer
Schommer, Christoph UL

in Operational Database Management Systems (2017)

Interviews with Data Scientists; see: http://www.odbms.org/2017/01/qa-with-data-scientists-christopher-schommer/

Detailed reference viewed: 93 (8 UL)
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See detailQ-value functions for decentralized POMDPs
Oliehoek, Frans A.; Vlassis, Nikos UL

in Proc Int. Joint Conf. on Autonomous Agents and Multi-Agent Systems (2007)

Planning in single-agent models like MDPs and POMDPs can be carried out by resorting to Q-value functions: a (near-) optimal Q-value function is computed in a recursive manner by dynamic programming, and ... [more ▼]

Planning in single-agent models like MDPs and POMDPs can be carried out by resorting to Q-value functions: a (near-) optimal Q-value function is computed in a recursive manner by dynamic programming, and then a policy is extracted from this value function. In this paper we study whether similar Q-value functions can be defined in decentralized POMDP models (Dec-POMDPs), what the cost of computing such value functions is, and how policies can be extracted from such value functions. Using the framework of Bayesian games, we argue that searching for the optimal Q-value function may be as costly as exhaustive policy search. Then we analyze various approximate Q-value functions that allow efficient computation. Finally, we describe a family of algorithms for extracting policies from such Q-value functions. [less ▲]

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See detailQ-value Heuristics for Approximate Solutions of Dec-POMDPs
Oliehoek, F. A.; Vlassis, Nikos UL

in Proc. AAAI Spring Symp. on Game Theoretic and Decision Theoretic Agents (2007)

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See detailQAM to Circular Isomorphic Constellations
Kayhan, Farbod UL

in 8th Advanced Satellite Multimedia Systems Conference (ASMS/SPSC), Palma de Mallorca, Spain, 2016 (2016, September)

Employing high order constellations is inevitable in order to achieve higher spectral efficiency in satellite communication systems. In DVB-S2X standard, constellations with up to 256 points have been ... [more ▼]

Employing high order constellations is inevitable in order to achieve higher spectral efficiency in satellite communication systems. In DVB-S2X standard, constellations with up to 256 points have been included. However, optimizing such high order constellations is a difficult task. In this paper we propose a very simple constellation design based on the radial map from QAM constellations to non-uniform APSK constellations. Our method provides a systematic way to generate a family of optimized high order constellations. We show that gains larger than 0.5 dB can be obtained with respect to the DVB-S2X constellations with 256 points. Even though the proposed constellations are essentially sub-optimal (in terms of maximizing the mutual information), they provide a very competitive test benchmark for the performance of high order constellations. Moreover, the proposed construction potentially allows for an efficient one-dimensional soft detection by an inverse mapping to the QAM. Finally, further optimization techniques are discussed. [less ▲]

Detailed reference viewed: 119 (8 UL)
See detailQASBA '11: Proceedings of the International Workshop on Quality Assurance for Service-Based Applications
Bianculli, Domenico UL; Guinea, Sam; Metzger, Andrea et al

Book published by ACM (2011)

Detailed reference viewed: 29 (1 UL)
See detailQASBA 2013: Proceedings of the 2013 International Workshop on Quality Assurance for Service-Based Applications
Bianculli, Domenico UL; Guinea, Sam; Hallé, Sylvain et al

Book published by ACM (2013)

Detailed reference viewed: 42 (6 UL)
See detailThe Qatar Embargo at the WTO: Finally a Case on Article XXI?
Fahner, Johannes Hendrik UL

Presentation (2017, December 13)

Detailed reference viewed: 128 (0 UL)
See detailQKD Simulator
Atashpendar, Arash UL

Software (2014)

QKD simulator © is a web application aimed at simulating and analyzing Quantum Key Distribution protocols. The online simulator is powered by the QKD Simulation Toolkit, which has been designed and ... [more ▼]

QKD simulator © is a web application aimed at simulating and analyzing Quantum Key Distribution protocols. The online simulator is powered by the QKD Simulation Toolkit, which has been designed and implemented to support customizing a wide range of parameters for individual components and sub-protocols, e.g., the quantum channel, sifting, error estimation, information reconciliation and privacy amplification. Each simulation run provides detailed information about the intermediate and final stages of the protocol. [less ▲]

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See detailQoE for spatial cognitive systems
Alodeh, Maha UL

in IEEE International Conference on Communications (2012)

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See detailQoS-Constrained Sum-Harvested Energy Maximization in OFDMA-based Wireless Cooperative Networks
Gautam, Sumit UL; Lagunas, Eva UL; Vuppala, Satyanarayana UL et al

Scientific Conference (2018, December)

We investigate the performances of the time-switching (TS) and power-splitting (PS) based energy harvesting models in a two-hop relay assisted network where the end-users are capable of decoding ... [more ▼]

We investigate the performances of the time-switching (TS) and power-splitting (PS) based energy harvesting models in a two-hop relay assisted network where the end-users are capable of decoding information and harvesting energy concurrently. In particular, we consider joint resource allocation and relay selection to realize Simultaneous Wireless Transmission of Information and Energy (Wi-TIE) in a multi-carrier multi-user cooperative system where the relays employ the amplify-and-forward (AF) protocol. First, we formulate based on the TS and PS Wi-TIE architectures an optimization problem to maximize the sum of energy harvested at the end-users, taking into consideration each user's quality-of-service (QoS) requirement as well as power constraints at the transmit and relaying nodes. We then solve the formulated problem to optimize the users' Wi-TIE splitting factors along with relay-user coupling, sub-carrier-user assignment, sub-carrier pairing, and power allocation. Finally, we demonstrate the benefits of the proposed framework via numerical results. [less ▲]

Detailed reference viewed: 69 (8 UL)
See detailQTI Standard: The Challenge of Designing Usable and Compliant Interfaces
Doublet, Sophie UL; Raber, Dieter; Sipasseuth, Somsack

Scientific Conference (2014, September 22)

Detailed reference viewed: 67 (24 UL)
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See detailQu'est-ce qu'un Luxembourgeois? Histoire de la nationalité luxembourgeoise du Code Napoléon à nos jours
Scuto, Denis UL

in Hemecht : Zeitschrift für Luxemburger Geschichte = Revue d'Histoire Luxembourgeoise (2006), (58/1), 73-96

Detailed reference viewed: 91 (6 UL)
See detailQu'est-ce qu'un Luxembourgeois? Histoire de la nationalité luxembourgeoise du Code Napoléon à nos jours: une histoire sous influence française, belge et allemande
Scuto, Denis UL

in Reuter, Antoinette; Ruiz, Jean-Philippe (Eds.) Retour de Babel. Itinéraires, mémoires et citoyenneté (2007)

Detailed reference viewed: 57 (4 UL)
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See detailQu’est-ce qu’une "création" ? Dialogue entre art et droit
Tore, Gian Maria UL; Gellé, Guillaume

Article for general public (2011)

Detailed reference viewed: 24 (0 UL)
See detailQu'est-ce qu'une archive du Web?
Musiani, Francesca; Paloque-Bergès, Camille; Schafer, Valerie UL et al

Book published by OpenEdition Press (2019)

Bien que le Web ait seulement trente ans, son patrimoine est déjà pléthorique : la fondation Internet Archive a collecté plus de 345 milliards de pages web depuis 1996. Cette fondation, qui fut l’un des ... [more ▼]

Bien que le Web ait seulement trente ans, son patrimoine est déjà pléthorique : la fondation Internet Archive a collecté plus de 345 milliards de pages web depuis 1996. Cette fondation, qui fut l’un des pionniers de l’archivage du Web, n’est pas seule à préserver et collecter aujourd’hui ce patrimoine dit « nativement numérique ». Au cours des années 2000, plusieurs pays ont en effet lancé de tels archivages, souvent confiés aux bibliothèques nationales, et cette tendance ne cesse de s’affirmer depuis. Ces initiatives introduisent des ruptures : dans la notion même d’archive, mais aussi dans les pratiques des professionnels des bibliothèques et du patrimoine, tout comme dans celles des chercheurs. Cet ouvrage se propose d’initier le lecteur aux enjeux humains et techniques de l’archivage de la Toile, de la collecte à l’analyse en passant par la création et le partage de corpus ou encore le cadre législatif. Il étudie de manière pragmatique cet archivage, en essayant de rendre palpable à la fois sa fabrique (technique, institutionnelle, juridique), la relation que ses acteurs entretiennent avec les publics et les évolutions qu’ont connues les collectes en une vingtaine d’années. Ce livre s’intéresse également à la manière dont les archives du Web, outre leur rôle patrimonial, peuvent aujourd’hui être exploitées par différents acteurs, notamment à des fins de recherche. [less ▲]

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See detailQu’est-ce que la justice ?
Lefort, Elisabeth UL

in Le Portique (2013)

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See detailQu’est-ce que la psychothérapie empiriquement fondée ?
Billieux, Joël UL; Blairy, Sylvie; Boulanger, Marie et al

in Revue Francophone de Clinique Comportementale et Cognitive (2012), 17(4), 5-7

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See detailQu'est-ce que, en droit, une exception?
Heuschling, Luc UL

in Fatin-Rouge Stefanini; Vidal-Naquet, Ariane (Eds.) La norme et ses exceptions. Quels défis pour la règle de droit ? (2014)

Detailed reference viewed: 167 (11 UL)