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  • Using satellite execution to reduce latency for mobile/cloud applications 

    Pettersen, Robert; Valvåg, Steffen; Kvalnes, Åge Andre; Johansen, Dag (Peer reviewed, 2016-02-03)
    We demonstrate a practical way to reduce latency for mobile .NET applications that interact with cloud services, without disrupting application architectures. We provide a programming abstraction for location-independent ...
  • Gender differences in the association between grip strength and mortality in older adults: results from the KORA-age study 

    Arvandi, Marjan; Strasser, Barbara; Meisinger, Christa; Volaklis, Konstantinos; Gothe, Raffaella Matteucci; Siebert, Uwe; Ladwig, Karl Heinz; Grill, Eva; Horsch, Alexander; Laxy, Michael; Peters, Annette; Thorand, Barbara (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-30)
    Background: Reduced muscular strength in the old age is strongly related to activity impairment and mortality. However, studies evaluating the gender-specific association between muscularity and mortality among older ...
  • GreenBST: Energy-efficient concurrent search tree 

    Umar, Ibrahim; Anshus, Otto; Ha, Hoai Phuong (Conference object, 2016-08-09)
    Like other fundamental abstractions for energy-efficient com- puting, search trees need to support both high concurrency and fine- grained data locality. However, existing locality-aware search trees such as ones based ...
  • On the performance and energy efficiency of the PGAS programming model on multicore architectures 

    Lagraviere, Jeremie Alexandre Emilien; Langguth, Johannes; Sourouri, Mohammed; Ha, Hoai Phuong; Cai, Xing (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09-15)
  • Access control protocol with node privacy in wireless sensor networks 

    Kumar, Pardeep; Gurtov, Andrei; Iinatti, Jari; Sain, Mangal; Ha, Hoai Phuong (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-15)
    For preventing malicious nodes joining wireless sensor networks (WSNs), an access control mechanism is necessary for the trustworthy cooperation between the nodes. In addition to access control, recently, privacy has been ...
  • Secure and scalable statistical computation of questionnaire data in R 

    Yigzaw, Kassaye Yitbarek; Michalas, Antonis; Bellika, Johan Gustav (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-12)
    Collecting data via a questionnaire and analyzing them while preserving respondents' privacy may increase the number of respondents and the truthfulness of their responses. It may also reduce the systematic differences ...
  • Implementing and optimizing a Sparse Matrix-Vector Multiplication with UPC 

    Lagraviere, Jeremie Alexandre Emilien; Prugger, Martina; Einkemmer, Lukas; Langguth, Johannes; Ha, Hoai Phuong; Cai, Xing (Research report; Forskningsrapport, 2016)
    Programmability and performance-per-watt are the major challenges of the race to Exascale. In this study we focus on Partitioned Global Address Space (PGAS) languages, using UPC as a particular example. This category ...
  • Enforcing Privacy Policies with Meta-Code 

    Johansen, Håvard; Birrell, Eleanor; Van Renesse, Robbert; Schneider, Fred B.; Stenhaug, Magnus; Johansen, Dag (Konferansebidrag, 2015)
    This paper proposes a mechanism for expressing and enforcing security policies for shared data. Security policies are expressed as stateful meta-code operations; meta-code can express a broad class of policies, including ...
  • Lessons learned from 25 years with telemedicine in Northern Norway 

    Hartvigsen, Gunnar; Pedersen, Steinar (Book; Bok, 2015)
  • Appendix E Telemedisinske løsninger i maritime operasjoner og redningstjeneste 

    Woldaregay, Ashenafi Zebene; Hartvigsen, Gunnar; Walderhaug, Ståle (Research report; Forskningsrapport, 2016)
    Folk som jobber i maritime miljø har ikke enkel tilgang til sentrale helsetjenester, og det gjelder spesielt for sjøfolk som arbeider i arktiske områder. Selv om telemedisin har vært en suksess på land, har telemedisin kun ...
  • Digital Chronofiles of Life Experience 

    Gurrin, Cathal; Johansen, Håvard; Sødring, Thomas; Johansen, Dag (Chapter; Bokkapittel, 2015-02-28)
    Technology has brought us to the point where we are able to digitally sample life experience in rich multimedia detail, often referred to as lifelogging. In this paper we explore the potential of lifelogging for the ...
  • Data-intensive computing infrastructure systems for unmodified biological data analysis pipelines 

    Bongo, Lars Ailo; Pedersen, Edvard; Ernstsen, Martin (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-18)
    Biological data analysis is typically implemented using a deep pipeline that combines a wide array of tools and databases. These pipelines must scale to very large datasets, and consequently require parallel and distributed ...
  • Kvik: three-tier data exploration tools for flexible analysis of genomic data in epidemiological studies 

    Fjukstad, Bjørn; Olsen, Karina Standahl; Jareid, Mie; Lund, Eiliv; Bongo, Lars Ailo (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-03-30)
    Kvik is an open-source system that we developed for explorative analysis of functional genomics data from large epidemiological studies. Creating such studies requires a significant amount of time and resources. It is ...
  • Description of spatio-temporal gait parameters in elderly people and their association with history of falls: Results of the population-based cross-sectional KORA-Age study 

    Thaler-Kall, Kathrin; Peters, Annette; Thorand, Barbara; Grill, Eva; Autenrieth, Christine S.; Horsch, Alexander; Meisinger, Christa (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-03-25)
    Background: In this epidemiological study we described the characteristics of spatio-temporal gait parameters among a representative, population-based sample of 890 community-dwelling people aged 65 to 90 years. In addition, ...
  • Towards Consent-Based Lifelogging in Sport Analytic 

    Johansen, Håvard; Gurrin, Cathal Gerard; Johansen, Dag (Chapter; Bokkapittel, 2015)
    Lifelogging is becoming widely deployed outside the scope of solipsistic self quantification. In elite sport, the ability to utilize these digital footprints of athletes for sport analytic has already become a game changer. ...
  • Fireflies: A Secure and Scalable Membership and Gossip Service 

    Johansen, Håvard; Van Renesse, Robbert; Vigfusson, Ymir; Johansen, Dag (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06)
    An attacker who controls a computer in an overlay network can effectively control the entire overlay network if the mechanism managing membership information can successfully be targeted. This article describes Fireflies, ...
  • DeltaTree: A Locality-aware Concurrent Search Tree 

    Umar, Ibrahim; Anshus, Otto; Ha, Hoai Phuong (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06-15)
    Like other fundamental abstractions for high-performance computing, search trees need to support both high concurrency and data locality. However, existing locality-aware search trees based on the van Emde Boas layout ...
  • Naturvitenskapens grunnlag og begrensning. Seminarrapport 

    Thorvaldsen, Steinar (Research report; Forskningsrapport, 1979)
    Foredrag av Arthur E. Wilder-Smith og Udo Middelmann holdt ved NTH i 1979
  • Evaluation of the power efficiency of UPC, OpenMP and MPI 

    Lagraviere, Jeremie; Ha, Hoai Phuong; Cai, Xing (Research report; Forskningsrapport, 2015)
    In this study we compare the performance and power efficiency of Unified Parallel C (UPC), MPI and OpenMP by running a set of kernels from the NAS Benchmark. One of the goals of this study is to focus on the Partitioned ...
  • Transparent Incremental Updates for Genomics Data Analysis Pipelines 

    Pedersen, Edvard; Willassen, Nils Peder; Bongo, Lars Ailo (Chapter; Bokkapittel, 2014)

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