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See detailExploring Effect of Location Number on Map-Based Graphical Password Authentication
Meng, Weizhi; Lee, Wanghao; Au, Man ho et al

in 22nd Australasian Conference on Information Security and Privacy - ACISP2017 (2017, July 03)

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See detailMeasuring data locality ratio in virtual MapReduce cluster using WorkflowSim
Wangsom, Peerasak; Lavangnananda, Kittichai; Bouvry, Pascal UL

in International Joint Conference on Computer Science and Software Engineering (JCSSE), 2017 14th (2017)

The data locality is significant factor which has a direct impact on the performance of MapReduce framework. Several previous works have proposed alternative scheduling algorithms for improving the ... [more ▼]

The data locality is significant factor which has a direct impact on the performance of MapReduce framework. Several previous works have proposed alternative scheduling algorithms for improving the performance by increasing data locality. Nevertheless, their studies had focused the data locality on physical MapReduce cluster. As more and more deployment of MapReduce cluster have been on virtual environment, a more suitable evaluation of MapReduce cluster may be necessary. This study adopts a simulation based approach. Five scheduling algorithms were used for the simulation. WorkflowSim is extended by inclusion of three implemented modules to assess the new performance measure called `data locality ratio'. Comparison of their results reveals interesting findings. The proposed implementation can be used to assess `data locality ratio' and allows users prior to efficiently select and tune scheduler and system configurations suitable for an environment prior to its actual physical MapReduce deployment. [less ▲]

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See detailDeniability in Quantum Cryptography
Atashpendar, Arash UL; Roenne, Peter UL; Ostrev, Dimiter UL et al

Poster (2017, June 14)

This poster describes ongoing work on deniability in quantum cryptography, an area of research that remains almost entirely unexplored in the quantum information processing literature. Deniability is a ... [more ▼]

This poster describes ongoing work on deniability in quantum cryptography, an area of research that remains almost entirely unexplored in the quantum information processing literature. Deniability is a well-known and fundamental concept in classical cryptography and it can be defined as the ability for the sender of a message to deny the contents of a message or the very act of having participated in an exchange, e.g. having sent the said message. We discuss deniability in the context of quantum key exchange and address a particular problem, first discovered by Donald Beaver, where he claims that all QKD protocols are undeniable. The claim is that while we do get a one-time pad (OTP) using QKD, it does not provide the property of key equivocation as it is expected in the Shannon sense for a OTP. Intuitively, this difficulty lies in the quantum channel alone and it has to do with the fact that in QKD, while we generate entropy by expanding an initially short pre-shared key into an arbitrary longer secret key, we do so by exchanging information over a quantum as well as a classical channel, which could potentially leave a binding transcript of Alice's decisions to the final secret key. This is in contrast with the implicit assumption that Eve knows nothing about how two given parties have established their shared OTP in the first place. We discuss the importance of deniability in cryptography and its wide range of applications, along with cryptographic primitives other than key exchange where deniability might be a desired property. Finally, we present a series of fundamental open questions in this area of research and discuss quantum cryptographic primitives that lend themselves to devising deniable protocols. [less ▲]

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See detailCAN With eXtensible In-Frame Reply: Protocol Definition and Prototype Implementation
Cena, Gianluca; Cibrario Bertolotti, Ivan; Hu, Tingting UL et al

in IEEE Transactions on Industrial Informatics (2017), 13(5), 2436-2446

Controller area network (CAN) has been the de facto standard in the automotive industry for the past two decades. Recently, CAN with flexible data-rate (CAN FD) has been standardized, which achieves ... [more ▼]

Controller area network (CAN) has been the de facto standard in the automotive industry for the past two decades. Recently, CAN with flexible data-rate (CAN FD) has been standardized, which achieves noticeably higher throughput. Further improvements are still possible for CAN, by exploiting its peculiar physical layer to carry out distributed operations among network nodes, implemented as atomic transactions mapped on quasi-conventional frame exchanges. In this paper, a proposal is made for an extension to the CAN protocol, termed CAN with eXtensible in-frame Reply (CAN XR), which enables upper protocol layers to define new custom services devoted to, e.g., network management, application-specific functions, and high-efficiency data transfer. The key point is that CAN XR retains full backward compatibility with CAN, therefore, there is no need to change the protocol specification once again. [less ▲]

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See detailLoad-Aware Strategies for Cloud-Based VoIP Optimization with VM Startup Prediction
Cortes-Mendoza, Jorge M.; Tchernykh, Andrei; Feoktistov, Alexander et al

in IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW), 2017 (2017)

In this paper, we address cloud VoIP scheduling strategies to provide appropriate levels of quality of service to users, and cost to VoIP service providers. This bi-objective focus is reasonable and ... [more ▼]

In this paper, we address cloud VoIP scheduling strategies to provide appropriate levels of quality of service to users, and cost to VoIP service providers. This bi-objective focus is reasonable and representative for real installations and applications. We conduct comprehensive simulation on real data of twenty three on-line non-clairvoyant scheduling strategies with fixed threshold of utilization to request VMs, and twenty strategies with dynamic prediction of the load. We show that our load-aware with predictions strategies outperform the known ones providing suitable quality of service and lower cost. The robustness of these strategies is also analyzed varying VM startup time delays to deal with realistic VoIP cloud environments. [less ▲]

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See detailReal-Time Virtual Network Function (VNF) Migration toward Low Network Latency in Cloud Environments
Cho, Daewoong; Taheri, Javid; Zomaya, Albert Y. et al

in IEEE 10th International Conference on Cloud Computing - Cloud 2017 (2017)

Network Function Virtualization (NFV) is an emerging network architecture to increase flexibility and agility within operator's networks by placing virtualized services on demand in Cloud data centers ... [more ▼]

Network Function Virtualization (NFV) is an emerging network architecture to increase flexibility and agility within operator's networks by placing virtualized services on demand in Cloud data centers (CDCs). One of the main challenges for the NFV environment is how to minimize network latency in the rapidly changing network environments. Although many researchers have already studied in the field of Virtual Machine (VM) migration and Virtual Network Function (VNF) placement for efficient resource management in CDCs, VNF migration problem for low network latency among VNFs has not been studied yet to the best of our knowledge. To address this issue in this article, we i) formulate the VNF migration problem and ii) develop a novel VNF migration algorithm called VNF Real-time Migration (VNF-RM) for lower network latency in dynamically changing resource availability. As a result of experiments, the effectiveness of our algorithm is demonstrated by reducing network latency by up to 70.90% after latency-aware VNF migrations. [less ▲]

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See detailLa régulation des émotions pendant le processus de médiation
Cabeza Alcina, Esther; Houssemand, Claude UL

Scientific Conference (2017, May)

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See detailIngénierie de la médiation. Exemple d’une action de médiation communautaire en Afrique
Serra, Lurdes; Houssemand, Claude UL

Scientific Conference (2017, May)

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See detailAre the mediators more emotionnaly competent than ordinary people?
Pignault, Anne UL; Houssemand, Claude UL

Scientific Conference (2017, May)

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See detailApproche psycho-sociale de l’évolution et de la portée de la médiation
Houssemand, Claude UL

Scientific Conference (2017, May)

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See detailLe processus de médiation et son issue à la croisée des dimensions psychologiques
Ben Mrad, Fathi; Pignault, Anne UL; Houssemand, Claude UL

Scientific Conference (2017, May)

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See detailHyperbolic ends with particles and grafting on singular surfaces
chen, qiyu; Schlenker, Jean-Marc UL

E-print/Working paper (2017)

We prove that any hyperbolic end with particles (cone singularities along infinite curves of angles less than π) admits a unique foliation by constant Gauss curvature surfaces. Using a form of duality ... [more ▼]

We prove that any hyperbolic end with particles (cone singularities along infinite curves of angles less than π) admits a unique foliation by constant Gauss curvature surfaces. Using a form of duality between hyperbolic ends with particles and convex globally hyperbolic maximal (GHM) de Sitter spacetime with particles, it follows that any convex GHM de Sitter spacetime with particles also admits a unique foliation by constant Gauss curvature surfaces. We prove that the grafting map from the product of Teichm\"uller space with the space of measured laminations to the space of complex projective structures is a homeomorphism for surfaces with cone singularities of angles less than π, as well as an analogue when grafting is replaced by "smooth grafting". [less ▲]

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See detailUniversal Reasoning, Rational Argumentation and Human-Machine Interaction
Benzmüller, Christoph UL

E-print/Working paper (2017)

Classical higher-order logic, when utilized as a meta-logic in which various other (classical and non-classical) logics can be shallowly embedded, is well suited for realising a universal logic reasoning ... [more ▼]

Classical higher-order logic, when utilized as a meta-logic in which various other (classical and non-classical) logics can be shallowly embedded, is well suited for realising a universal logic reasoning approach. Universal logic reasoning in turn, as envisioned already by Leibniz, may support the rigorous formalisation and deep logical analysis of rational arguments within machines. A respective universal logic reasoning framework is described and a range of exemplary applications are discussed. In the future, universal logic reasoning in combination with appropriate, controlled forms of rational argumentation may serve as a communication layer between humans and intelligent machines. [less ▲]

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See detailLocal History: "Frauen: Denk mal"
Ganschow, Inna UL

Article for general public (2017)

Die Stadt Luxemburg scheint ihr Stadtbild durch den Wechsel von eng be- bauten Straßenzügen und offenen Plätzen, Wohnvierteln und Parks, Banken und Rasenflächen in ein harmonisches Gleichgewicht ... [more ▼]

Die Stadt Luxemburg scheint ihr Stadtbild durch den Wechsel von eng be- bauten Straßenzügen und offenen Plätzen, Wohnvierteln und Parks, Banken und Rasenflächen in ein harmonisches Gleichgewicht bringen zu wollen. Eine der Methoden, Übergänge zwischen bebautem und freiem Raum zu kreieren oder auch ein Zuviel an „Luft“ zu füllen, ist ein Denkmal, das die Leere des Raums geschickt ausbalanciert. Außerdem erfüllte es außer der dekorativen schon immer auch eine erzieherische Funktion: Es sichert Erinnerungswerte, schreibt bestimmte Beispiele ins Gedächtnis der Nachkommen ein. Die „Gëlle Fra“, Charlotte und Amalia sind nur einige der bekannteren Frauen- denkmäler der Stadt, die uns die Vorfahren – und Vorfahrinnen – hinterlassen haben. Betrachten wir die weiblichen Gestalten näher. [less ▲]

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See detailWhat can EuADS contribute to the European Network of Big Data Centers of Excellence?
Böhmer, Matthias UL; Krolak-Schwerdt, Sabine

Presentation (2017, January)

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See detailDiaspora Philanthropy in the Context of Policy Coherence for Development: Implications for the post-2015 Sustainable Development Agenda
Koff, Harlan UL

in International Migration (2017), 55(1), 5-19

Thus far, there has been a dearth of studies that systemically examine the relationship between diaspora philanthropy, the development community and securitised migration regimes. This article addresses ... [more ▼]

Thus far, there has been a dearth of studies that systemically examine the relationship between diaspora philanthropy, the development community and securitised migration regimes. This article addresses this by responding to the research question, “How coherent are securitised migration policies with diaspora philanthropy and the transformative development objectives that characterise the Sustainable Development Goals (SDGs) agenda?” The analysis is based on the concept of policy coherence for development (PCD). The article compares the simultaneous regionalization and securitization of European Union and United States migration policies and contends that these policy strategies undermine diaspora philanthropy, development partnerships and transformative development. Normative change must be introduced in order to establish coherence between globalized migration policies and diaspora philanthropy objectives. Normative coherence for development can be achieved by introducing principles from the SDG's and the Busan Development Partnership Agreement amongst other international development agendas, into migration policy-making at the national and regional levels. [less ▲]

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