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See detailMetaheuristics for the Virtual Machine Mapping Problem in Clouds
Nesmachnow, Sergio; Dorronsoro, Bernabé UL; Talbi, El-Ghazali et al

in Informatica, Lith. Acad. Sci. (2015), 26(1), 111-134

This article presents sequential and parallel metaheuristics to solve the virtual machines subletting problem in cloud systems, which deals with allocating virtual machine requests into prebooked ... [more ▼]

This article presents sequential and parallel metaheuristics to solve the virtual machines subletting problem in cloud systems, which deals with allocating virtual machine requests into prebooked resources from a cloud broker, maximizing the broker profit. Three metaheuristic are studied: Simulated Annealing, Genetic Algorithm, and hybrid Evolutionary Algorithm. The experimental evaluation over instances accounting for workloads and scenarios using real data from cloud providers, indicates that the parallel hybrid Evolutionary Algorithm is the best method to solve the problem, computing solutions with up to 368.9% profit improvement over greedy heuristics results while accounting for accurate makespan and flowtime values. [less ▲]

Detailed reference viewed: 107 (0 UL)
See detailMetall-Isolator-Übergang von Lanthanhydriden: eine Kernspin-Relaxationsanalyse
Leyer, Stephan UL

Book published by Cuvillier Verlag (2004)

Detailed reference viewed: 36 (2 UL)
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See detailMetallaxis-FL: mutation-based fault localization
Papadakis, Mike UL; Le Traon, Yves UL

in Software Testing : Verification & Reliability (2015), 25

Detailed reference viewed: 223 (15 UL)
See detailMetallic and non-metallic lanthanum hydrides studied by means of nuclear magnetic resonance
Leyer, Stephan UL; Dormann, E.

in Journal of Alloys and Compounds (2004), 363(1-2), 15-18

Detailed reference viewed: 68 (1 UL)
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See detailLa métallurgie dans la région liégeoise du XVe siècle à l’aube du XIXe siècle
Leboutte, René UL

in Herrmann H.-W., Wynants P. (Ed.) Wandlungen der Eisenindustrie vom 16. Jahrhundert bis 1960. Mutations de la sidérurgie du XVIe siècle à 1960 (1997)

Detailed reference viewed: 19 (0 UL)
See detailMetalmorphosis – Ou les délices inorganiques de quelques pierceurs à Rome
Reckinger, Rachel UL

Bachelor/master dissertation (1999)

Detailed reference viewed: 20 (1 UL)
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See detailMetalorganic chemical vapour deposition of p-type delafossite CuCrO2 semiconductor thin films: characterization and application to transparent p-n junction
Crêpellière, Jonathan Charles UL

Doctoral thesis (2016)

Transparent conducting oxides such as ITO, FTO or AZO, are currently used in a number of commercial applications, such as transparent electrodes for flat panel displays, light-emitting diodes and solar ... [more ▼]

Transparent conducting oxides such as ITO, FTO or AZO, are currently used in a number of commercial applications, such as transparent electrodes for flat panel displays, light-emitting diodes and solar cells. These applications rely essentially on n-type conductive materials. The developments towards electronic devices based on transparent p-n junctions have triggered an intense research for the synthesis of p-type transparent conductors with sufficiently high quality. Copper-based delafossite materials are thought to hold one of the highest potential and among them CuCrO2 has exhibited strong potential in terms of trade off electrical conductivity and optical transparency. In this work, we report for the first time on CuCrO2 thin-films, grown using a pulsed injection MOCVD. We particularly highlight the influence of the growth temperature, the volume precursor ration and the oxygen partial pressure on chemical, morphological, structural, electrical and optical properties of the films. Delafossite CuCrO2 thin films are synthesized as low as 310°C on glass substrate, which is the lowest growth temperature reported to our knowledge. The films exhibit a carbon contamination below 1%, an excess of chromium and a p-type conductivity. Electrical conductivity at room temperature is measured as high as 17S.cm-1 with a moderate visible transparency at 50%. We report the highest trade off electrical conductivity and visible transparency of CuCrO2 thin films. We investigate the transport conduction with simultaneous electrical and thermoelectrical measurements and band conduction and small polaron models are controversially discussed. A functional transparent p-n junction CuCrO2/ZnO, based on only two-layers, is synthesized with a visible transparency of 45-50%. The junction shows a typical current-voltage characteristic of a diode, with high series resistance features. The device is efficiently acting as an UV detector. [less ▲]

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See detailA Metamodel-based Classification of Variability Modeling Approaches
Istoan, Paul; Klein, Jacques UL; Perrouin, Gilles UL et al

in VARY, International Workshop affiliated with ACM/IEEE 14th International Conference on Driven Engineering Languages and Systems (2011)

Software Product Line Engineering (SPLE) is an emerging paradigm taking momentum that proposes to address flexibility and shorter time-to-market by maximizing software reuse. The key characteristic of ... [more ▼]

Software Product Line Engineering (SPLE) is an emerging paradigm taking momentum that proposes to address flexibility and shorter time-to-market by maximizing software reuse. The key characteristic of SPLE is the effective modelling and management of variability, for which a number of Variability Modeling (VM) techniques have been developed during the last two decades. Therefore, understanding their commonalities and differences is important for selecting the most suitable technique. In this paper, we propose a metamodel-based classification of VM techniques gathered through a survey of relevant literature. [less ▲]

Detailed reference viewed: 183 (1 UL)
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See detailA Metamodeling Approach for Cross-layer Optimization: A framework and Application to Voice over WiFi
Papapanagiotou, Ioannis; Granelli, Fabrizio; Kliazovich, Dzmitry UL et al

in Simulation Modelling Practice & Theory (2011), 19(9), 2117-2129

Cross-layer design has been proposed to optimize the performance of networks by exploiting the interrelations among parameters and procedures at different levels of the protocol stack. This paper ... [more ▼]

Cross-layer design has been proposed to optimize the performance of networks by exploiting the interrelations among parameters and procedures at different levels of the protocol stack. This paper introduces a quantitative framework for the study of cross-layer interactions, which enables design engineers to analyze and quantify interlayer dependencies and to identify the optimal operating point of the system, by using network economic theory principles. The framework is then used for performance optimization of a single-cell Voice over WiFi (VoWiFi) system. Insights gained from the considered scenario enable us to define a novel cross-layer Call Admission Control (CAC) scheme. The multistage CAC takes into account Quality of Service (QoS) criteria, which provide satisfaction to the end user, as well as revenue criteria that maximize the possible profit of the WiFi provider. [less ▲]

Detailed reference viewed: 78 (1 UL)
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See detailA metamodeling approach for reasoning about requirements
Göknil, Arda UL; Kurtev, I.; van den Berg, K.

in European Conference on Model Driven Architecture-Foundations and Applications (ECMFA) 2013-12-05 15:27:22 +0000 (2008)

Detailed reference viewed: 53 (0 UL)
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See detailA Metamodeling Approach for Reasoning on Multiple Requirements Models
Göknil, Arda UL; Kurtev, I.; Millo, J. V.

in Enterprise Distributed Object Conference (EDOC) 2013-12-05 15:24:18 +0000 (2013)

Detailed reference viewed: 79 (6 UL)
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See detailMetamodeling of semantic web enabled multiagent systems
Kardas, G.; Göknil, Arda UL; Dikenelli, O. et al

in Multiagent Systems and Software Architecture (MASSA), Erfurt, Germany 2013-12-05 15:30:26 +0000 (2006)

Detailed reference viewed: 29 (0 UL)
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See detailMetamorphic Security Testing for Web Systems
Mai, Xuan Phu UL; Pastore, Fabrizio UL; Goknil, Arda et al

in IEEE International Conference on Software Testing, Verification and Validation (ICST) 2020 (2020, March)

Security testing verifies that the data and the resources of software systems are protected from attackers. Unfortunately, it suffers from the oracle problem, which refers to the challenge, given an input ... [more ▼]

Security testing verifies that the data and the resources of software systems are protected from attackers. Unfortunately, it suffers from the oracle problem, which refers to the challenge, given an input for a system, of distinguishing correct from incorrect behavior. In many situations where potential vulnerabilities are tested, a test oracle may not exist, or it might be impractical due to the many inputs for which specific oracles have to be defined. In this paper, we propose a metamorphic testing approach that alleviates the oracle problem in security testing. It enables engineers to specify metamorphic relations (MRs) that capture security properties of the system. Such MRs are then used to automate testing and detect vulnerabilities. We provide a catalog of 22 system-agnostic MRs to automate security testing in Web systems. Our approach targets 39% of the OWASP security testing activities not automated by state-of-the-art techniques. It automatically detected 10 out of 12 vulnerabilities affecting two widely used systems, one commercial and the other open source (Jenkins). [less ▲]

Detailed reference viewed: 81 (13 UL)
See detailMetamorphosen der Epilepsie. Eine Krankheit als Hüterin der Verwandlungen
Heimböckel, Dieter UL

in Bendheim, Amelie; Pavlik, Jennifer (Eds.) Figurationen von Krankheiten. Chancen und Grenzen der Ästhetisierung (2019)

Detailed reference viewed: 18 (0 UL)
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See detailMetamorphosis of educational understanding: Temporary Integration regarding Syrians in Turkey
Samuk, Sahizer UL

in Border Crossing (2018)

The integration of refugees in Turkey has been realized in the field with the help of DGMM (Directorate General on Migration Management), Kızılay and UNHCR mainly, and by many more international and non ... [more ▼]

The integration of refugees in Turkey has been realized in the field with the help of DGMM (Directorate General on Migration Management), Kızılay and UNHCR mainly, and by many more international and non-governmental organizations that have supported refugees by answering their short-term needs such as giving them cards for shopping, clothes, preparing them for winter (“winterization”) and providing educational assistance. I conducted 15 interviews with state officials, various NGOs and a few refugees. During my research many interesting points about integration policies (to-be-formed) at the moment in Turkey were discovered. One interesting finding was that the state officials do not like to use the word “integration”, as it is reminiscent of the way Turkish migrant workers were treated in Germany, where assimilation and integration were understood as the same concept. I use the term “temporary integration” for the case of all refugees, but this paper will focus mostly on the Syrians’ case. Within the context of temporariness, this paper’s central attention will be the educational integration of Syrian refugees in Turkey. I argue in the paper that the temporariness and the nostalgia with the Ottoman past are two main elements mostly present regarding the educational integration of Syrians in Turkey. [less ▲]

Detailed reference viewed: 100 (5 UL)
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See detailThe Metamorphosis of the European Economic Constitution
Hofmann, Herwig UL; Pantazatou, Aikaterini UL; Zaccaroni, Giovanni

Book published by Elgar Publishing - 1st (2019)

Detailed reference viewed: 127 (11 UL)
See detailDie Metapher in der Sprachendidaktik
Ehrhart, Sabine UL

Presentation (2008, October 19)

Detailed reference viewed: 32 (1 UL)
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See detailMetaphern als Spuren von Diskursen in biographischen Texten
Karl, Ute UL

in Forum: Qualitative Sozialforschung = Forum: Qualitative Social Research [FQS] (2007), 8(1, Art.3),

In this article I discuss the potentials of discourse theory for biographical research from a social constructivist perspective. The connection between discourse theory and biographical research is ... [more ▼]

In this article I discuss the potentials of discourse theory for biographical research from a social constructivist perspective. The connection between discourse theory and biographical research is becoming increasingly important in qualitative research. Despite this increasing importance, there are few guidelines explaining how discourses or parts of discourses can be reconstructed in biographical narratives and how the complex relation of temporality and narration can be taken into consideration. This contribution focuses on these issues and suggests the analysis of metaphors as a possible means to reconstruct discourses or parts of them in biographical narratives. Two examples will illustrate this perspective. [less ▲]

Detailed reference viewed: 253 (3 UL)
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See detailMétaphores
Meyers, Christian UL

Article for general public (2004)

Detailed reference viewed: 2 (0 UL)
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See detailMetaphors in Digital Hermeneutics: Zooming through Literary, Didactic and Historical Representations of Imaginary and Existing Cities
Armaselu, Florentina UL; van den Heuvel, Charles

in Digital Humanities Quarterly (2017), 11(3),

The paper proposes to bridge two areas of inquiry, digital hermeneutics and metaphor within a digital environment, by the analysis of a less studied phenomenon, i.e. how interpretation is supported and ... [more ▼]

The paper proposes to bridge two areas of inquiry, digital hermeneutics and metaphor within a digital environment, by the analysis of a less studied phenomenon, i.e. how interpretation is supported and shaped by metaphors embedded in an interface. The study is articulated around three use cases for literary, didactic and historical representations of imaginary and existing cities based on a model (z-text) and interface (Z-editor) for zoomable texts. We will try to demonstrate that the zooming and contextualization features of the tool allow creating layers of meaning that can assist interpretation and critical readings of literature and history. [less ▲]

Detailed reference viewed: 119 (37 UL)