Endre søk
Begrens søket
1234567 151 - 200 of 1099
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Treff pr side
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
Merk
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 151.
    Boström, Rikard
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT.
    Moilanen, Lars-Olof
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT.
    Capacity profiling modeling for baseband applications2009Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    Real-time systems are systems which must produce a result within a given time frame. A result given outside of this time frame is as useless as not delivering any result at all. It is therefore essential to verify that real-time systems fulfill their timing requirements. A model of the system can facilitate the verification process. This thesis investigates two possible methods for modeling a real-time system with respect to CPU-utilization and latency of the different components in the system. The two methods are evaluated and one method is chosen for implementation.The studied system is the decoder of a WCDMA system which utilizes a real-time operating called system OSEck. The methodology of analyzing the system and different ways of obtaining measurements to base the model upon will be described. The model was implemented using the simulation library VirtualTime, which contains a model of the previously mentioned operating system. Much work was spent acquiring input for the model, since the quality of the model depends largely on the quality of the analysis work. The model created contains two of the studied systems main components.This thesis identifies thorough system knowledge and efficient profiling methods as the key success factors when creating models of real-time systems.

  • 152.
    Bozakov, Zdravko
    et al.
    Dell EMC, Ireland.
    Mangiante, Simone
    Dell EMC, Ireland.
    Hernandez Benet, Cristian
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013).
    Brunström, Anna
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013). Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Santos, Ricardo
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013).
    Kassler, Andreas
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013).
    Buckley, Donagh
    Dell EMC, Ireland.
    A NEAT framework for enhanced end-host integration in SDN environments2017Inngår i: 2017 IEEE Conference on Network Function Virtualization and Software Defined Networks (NFV-SDN), IEEE, 2017Konferansepaper (Fagfellevurdert)
    Abstract [en]

    SDN aims to facilitate the management of increasingly complex, dynamic network environments and optimize the use of the resources available therein with minimal operator intervention. To this end, SDN controllers maintain a global view of the network topology and its state. However, the extraction of information about network flows and other network metrics remains a non-trivial challenge. Network applications exhibit a wide range of properties, posing diverse, often conflicting, demands towards the network. As these requirements are typically not known, controllers must rely on error-prone heuristics to extract them. In this work, we develop a framework which allows applications deployed in an SDN environment to explicitly express their requirements to the network. Conversely, it allows network controllers to deploy policies on end-hosts and to supply applications with information about network paths, salient servers and other relevant metrics. The proposed approach opens the door for fine grained, application-aware resource optimization strategies in SDNs

  • 153.
    Brajdic, Agata
    et al.
    Fac. of EE & Comput., Univ. of Zagreb, Zagreb, Croatia .
    Kassler, Andreas
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Matijasevic, Maja
    Quality of Experience based optimization of heterogeneous multimedia sessions in IMS2011Inngår i: Proceedings of Baltic Congress on Future Internet Communications, IEEE conference proceedings, 2011, s. 25-32Konferansepaper (Fagfellevurdert)
    Abstract [en]

    For delivering multimedia services over (wireless) networks it is important that the mechanisms which negotiate and optimize content delivery under resource constraints take into account user perceived quality in order to improve user satisfaction. Within the scope of the IP Multimedia Subsystem (IMS) architecture a novel application server may be added which handles multi-user multi-flow Quality of Experience (QoE) negotiation and adaptation for heterogeneous user sessions. Based on a mathematical model, which takes into account the characteristics of audio, video and data sessions for QoE optimization, we develop several optimization algorithms to be used by the application server to maximize overall user defined QoE parameters for all ongoing multimedia sessions, subject to network resource constraints. Our results show that a greedy based approach provides a reasonable compromise in terms of run-time and sub-optimality for the overall QoE based resource allocations.

  • 154. Brauer, H.E.
    et al.
    Starnberg, H.I.
    Holleboom, Thijs Jan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Hughes, H.P.
    In situ intercalation of the layered compounds TiS2, ZrSe2, and VSe21995Konferansepaper (Fagfellevurdert)
  • 155. Brauer, H.E.
    et al.
    Starnberg, H.I.
    Holleboom, Thijs Jan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Hughes, H.P.
    The electronic structure of ZrSe2 and Csx ZrSe2 studied by angle-resolved photoemission1995Inngår i: J. Phys. Condens. Matter 6, 7741 (1995)Artikkel i tidsskrift (Fagfellevurdert)
  • 156. Brauer, H.E.
    et al.
    Starnberg, H.I.
    Holleboom, Thijs Jan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Hughes, H.P.
    Strocov, V.N.
    Modifying the electronic structure of TiS2 by alkali metal interaction1999Inngår i: J. Phys. Condens. Matter 11, 8957 (1999)Artikkel i tidsskrift (Fagfellevurdert)
  • 157. Brauer, H.E.
    et al.
    Starnberg, H.I.
    Holleboom, Thijs Jan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Hughes, H.P.
    Strocov, V.N.
    Na and Cs intercalation of 2H-TaSe2 studied by photoemission2001Inngår i: J. Phys. Condens. Matter 13, 9879-9895 (2001)Artikkel i tidsskrift (Fagfellevurdert)
  • 158. Brauer, H.E.
    et al.
    Starnberg, H.I.
    Holleboom, Thijs Jan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Strocov, V.N.
    Hughes, H.P.
    Electronic structure of pure and alkali metal intercalated VSe21998Inngår i: Phys. Rev B 58, 10031 (1998)Artikkel i tidsskrift (Fagfellevurdert)
  • 159. Brauer, H.E.
    et al.
    Starnberg, H.I.
    Hughes, H.P.
    Holleboom, Thijs Jan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Band mapping of in situ Cs intercalated transition metal dichalcogenides1996Inngår i: Surf. Sci. 357-358, 345 (1996)Artikkel i tidsskrift (Fagfellevurdert)
  • 160. Brolin, Jonas
    et al.
    Dely, Peter
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap.
    Hedegren, Mikael
    Kassler, Andreas
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Implementing Packet Aggregation in the Linux Kernel2008Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In multi-hop wireless mesh networks (WMN) Voice over IP (VoIP) suffers from large overhead created by the IP/UDP/RTP/MAC header and time due to collisions. As a result the VoIP capacity of WMNs is small. As shown in [1] a 3 hop WMN at a data rate of 2Mbit/s can only support 3 concurrent VoIP flows. [1], [2] and [3] propose the use of packet aggregation in order to reduce the overhead and thus increase the capacity. The idea behind packet aggregation is to combine multiple small packets into a single larger one, reducing overhead and collision probability in multi-hop environment. This paper presents insights into an implementation of an aggregation scheme in the Linux Kernel and its experimental evaluation

  • 161.
    Brolin, Jonas
    et al.
    Karlstads universitet, Institutionen för informationsteknologi.
    Hedegren, Mikael
    Karlstads universitet, Institutionen för informationsteknologi.
    Packet Aggregation in Linux2008Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Voice over IP (VoIP) traffic in a multi-hop wireless mesh network (WMN) suffers from a large overhead due to mac/IP/UDP/RTP headers and time collisions. A consequence of the large overhead is that only a small number of concurrent VoIP calls can be supported in a WMN[17]. Hop-to-hop packet aggregation can reduce network overhead and increase the capacity. Packet aggregation is a concept which combines several small packets, destined to a common next-hop destination, to one large packet. The goal of this thesis was to implement packet aggregation on a Linux distribution and to increase the number of concurrent VoIP calls. We use as testbed a two-hop WMN with a fixed data rate of 2Mbit/s. Traffic was generated between nodes using MGEN[20] to simulate VoIP behavior. The results from the tests show that the number of supported concurrent flows in the testbed is increased by 135% compared to unaggregated traffic.

  • 162.
    Bromander, Anton
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013).
    Using Privacy Indicators to Nudge Users into Selecting Privacy Friendly Applications2019Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    In the play store today, users are shown download count, app rating, reviews, screenshots etc. when deciding to download an application, and it’s shown very conveniently. If the users however are interested in viewing privacy in- formation about the application, it is multiple clicks away and there is no default in how to display it. This is where privacy indicators come in handy. With privacy indicators, data can be analyzed and displayed to the user in a way they understand, even if they don’t understand what the data itself means and what is dangerous. This however comes with the challenge of deciding what is dangerous and what is not.

    This report creates and implements an app store with added privacy infor- mation displayed to the user in the form of a privacy indicator and some detailed information about each application. To test the effectiveness of the privacy indicator, a small scale study was conducted where it was discovered that users who were not already interested in privacy didn’t pay much at- tention to it, while those who were took it more into account when deciding to download applications.

  • 163.
    Broström, Anders
    et al.
    Karlstads universitet, Institutionen för informationsteknologi.
    Kihlstadius, Niclas
    Karlstads universitet, Institutionen för informationsteknologi.
    Prototyp av en VoIP/PSTN-gateway2007Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Under de senaste åren har Internettelefonin varit på frammarsch, och i takt med att tekniken mognat har fler och fler börjat se den som ett alternativ till att ringa via telefonnätet. Förutom att det är billigare att ringa över det förstnämnda, så erbjuder Internettelefonin också en rad revolutionerande tjänster. Det är dock troligt att telefonnätet kommer att få tjänstgöra i många år till, och det erbjuder fortfarande överlägset bäst stabilitet och har stor acceptans. Om de två telefoninätverken ska existera sida vid sida, med varsina användarbaser är det lämpligt om de kan fås att samverka, så att användare av det ena kan ringa användare av det andra, och vice versa. Detta kan göras med en VoIP/PSTN-gateway, som översätter kontrollinformation och rösttrafik mellan de två nätverken.

    Uppsatsen handlar om det arbete vi har utfört år TietoEnator i Karlstad. Uppgiften bestod i att utveckla en prototyp av en VoIP/PSTN-gateway. Från början var det avsett att systemet skulle klara uppringning från endera en ”vanlig” telefon, eller en så kallad IP-telefon. Därtill skulle rösttrafiken överföras genom ändamålsenlig hårdvara. För att utföra arbetet behövde vi först studera relevanta kommunikationsprotokoll både för telefonnätet och för Internet, för att se hur dessa kunde fås att samverka. Vi behövde också lära oss tillgängliga system, bibliotek och verktyg för att förstå hur vi skulle skapa vårt eget system i den efterkommande implementeringsfasen. På grund av en lång inläsningsperiod och inledande tekniska problem, samt att nödvändig hårdvara för översättning av rösttrafiken inte anlände i tid begränsades arbetet till att innefatta samtal initierade från den vanliga telefonen till ip-telefonen, utan röstöverföring. Likväl har ett resultatgivande arbete utförts, och det beskrivs i detalj i rapporten.

  • 164.
    Brunström, Anna
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Reliable and Secure Communication in SCTP2010Konferansepaper (Fagfellevurdert)
  • 165.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Alfredsson, Stefan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap.
    Garcia, Johan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Lindskog, Stefan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    NEWCOM DR6.2: First report on frameworks/models matching Department 6 needs2005Rapport (Fagfellevurdert)
    Abstract [en]

    During the first phase of NEWCOM the focus areas of Department 6 were identified and refined. A number of relevant knowledge gaps were identified for the areas transport protocols, architectures and cross-layer aspects, and modelling. In this deliverable we describe a first set of frameworks/models to support research integration within the Department. The integration approach and the defined models/frameworks are described for each one of the selected knowledge gaps. The deliverable also includes a report on tools, software libraries and traces that can be shared between the partners

  • 166.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Asplund, Katarina
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap.
    Garcia, Johan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Enhancing TCP Performance by Allowing Controlled Loss2000Konferansepaper (Fagfellevurdert)
  • 167.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Cavalcanti de Castro, Marcel
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap.
    Karlsson, Jonas
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap.
    Kassler, Andreas
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Palazzo, S
    DR11.2: Intermediate report on resource management issues and routing/forwarding schemes for opportunistic networks2009Rapport (Fagfellevurdert)
  • 168.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Cavalcanti de Castro, Marcel
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap.
    Kassler, Andreas
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Lavén, Andreas
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap.
    Dely, Peter
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap.
    Galluccio, L
    NEWCOM++ DR11.3: Final report on the activities and results of WPR112010Rapport (Annet vitenskapelig)
    Abstract [en]

    This document is the last deliverable of WPR.11 and presents an overview of the final activities carried out within the NEWCOM++ Workpackage WPR.11 during the last 18 months. We provide a description of the most consolidated Joint Research Activities (JRAs) and the main results so far obtained. We also address some considerations on the future activities which are expected to continue at the end of NEWCOM++

  • 169.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Fischer Hübner, Simone
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Lindskog, Stefan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Martucci, Leonardo
    NEWCOM DR7.1: Report on the knowledge gaps to be filled and the action plan2004Rapport (Fagfellevurdert)
    Abstract [en]

    This deliverable is the starting point of the activities in the NEWCOM Department 7 QoS Provision in Wireless Networks: Mobility, Security and Radio Resource Management. It provides the view of the department in terms of the objectives of the European research on Wireless Network aspects and, after developing the framework for QoS provision in wireless networks, it identifies the knowledge gaps existing in the fields of radio resource allocation, mobility management and security issues. As a result of that, the action plan for the future activities in the department is established

  • 170.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Garcia, Johan
    Lindskog, Stefan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    NEWCOM DR6.1: Report on the knowledge gaps to be filled and the action plan2004Rapport (Fagfellevurdert)
    Abstract [en]

    The EU FP6 network of excellence in wireless communication, Newcom, is a large network that covers most areas of wireless communication. The research work within Newcom is organized into a number of departments and projects where Department 6 addresses Protocols and Architectures, and Traffic Modelling for (Reconfigurable/ Adaptive) Wireless Networks. The scope of Department 6 is quite broad making it important to further identify and refine the focus areas of the department. This document summarizes research areas that fall within the competence of and are of interest for the members of Department 6 and also describes the background of the partners within these areas. A set of knowledge gaps that will be addressed within the department are identified. A number of integrating activities that can be used to coordinate the efforts of the partners are described and an action plan for the continued work within the department is provided

  • 171.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Garcia, Johan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Lindskog, Stefan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    NEWCOM DR6.4: Proceedings of the Newcom Department 6 Second Technical Workshop2005Rapport (Fagfellevurdert)
    Abstract [en]

    The Second Newcom Department 6 Technical Workshop was organized in Barcelona on September 16-17, 2005. The workshop program contained 6 presentations and provided a good overview of ongoing research integration activities within the department. All of the three areas of the department, transport protocols, architectures and cross-layer aspects, and modelling were represented with presentations. This deliverable contains the presentation material from the workshop. The included presentations are:



    - Westwood-SCTP: A Transport Protocol for Traffic Balancing on Multihomed Hosts

    - Transport Layer Handover using SCTP

    - The Optimization of Transport Protocol over Ad-Hoc Networks

    - Wireless Networks Emulation

    - An Analytical Model of Rate-Controlled MPEG Video Sources in a UMTS Network

    - An Analytical Model of a Rate-controlled MPEG-4 Video Source Capturing both Intra-frame and Inter-frame Correlation



    As an option, a supporting paper for the presentation could also be supplied by the authors. The

    deliverable contains supporting articles for two of the presentations

  • 172.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Kearns, P
    Global Predicate Detection Based on Transport Layer Vector Time1997Konferansepaper (Fagfellevurdert)
  • 173.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Kearns, Phil
    Transport Layer versus Application Layer Vector Time1997Rapport (Fagfellevurdert)
    Abstract [en]

    Vector time has emerged as a useful technique for solving problems in distributed systems. Although vector time is likely to be maintained by supporting code positioned in kernel space or in message-passing middleware, vector time is traditionally viewed as if it were defined at the application layer.

    In this paper we consider vector time as perceived at the transport layer. We establish existing relationships between transport layer and application layer vector time. Transport layer vector time provides a more up-to-date view of the current system state. Furthermore, transport layer vector time preserves any interprocess causal relationships captured by application layer vector time. We illustrate how the more up-to-date view of the transport layer can improve both the accuracy and the efficiency for algorithms on which concurrency has an adverse effect. Some general guidelines for when transport layer vector time may be appropriate are provided. The possibility of updating vector time for acknowledgment messages is also considered. A new

    distributed termination detection algorithm based on this feature is presented

  • 174.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Lindskog, Stefan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Proceedings of the 2nd International Workshop on Security and Communication Networks (IWSCN 2010)2010Bok (Fagfellevurdert)
    Abstract [en]

    This publication contains the Proceedings of the 2nd International Workshop on Security and Communication Networks (IWSCN 2010) that will be held on May 2628, 2010 in Karlstad, Sweden. IWSCN 2010 brings together researchers, developers, practitioners, and users interested in the area of security and communication networks. The workshop focuses on how to design, build, and evaluate future networks that are secure, reliable, and provide high and predictable performance. The aim of the workshop is to serve as a forum for presenting current and future work, as well as to exchange research ideas in these fields.Papers containing research contributions focusing on aspects of security and communication networks were solicited for submission to IWSCN 2010. A total of 40 papers were received, representing authors from 20 different countries and 5 different continents. Each paper was reviewed by at least three members of the technical program committee. After a thorough review process, 13 papers were selected for presentation at the workshop, giving an acceptance rate of 32.5%. In addition to the technical papers, two keynote presentations on The Changing Performance Goals in Internet Video Streaming and Dependable Protocols for Wireless Sensor Networks will be provided by Carsten Griwodz from the Simula Research Laboratory AS in Norway and Levente Buttyán from Budapest University of Technology and Economics in Hungary, respectively. Furthermore, a tutorial on Penetration Testing from an Attacker Perspective will be given by Vesa Virta from the National Defence Radio Establishment in Sweden.IWSCN 2010 is organized by the Department of Computer Science at Karlstad University and is supported by the Euro-NF and Newcom++ EU Networks of Excellence, and IEEE Sweden Section. The workshop is sponsored by Compare Karlstad Foundation, Coromatic, and TeliaSonera, and we thank them for their support. We also gratefully thank all authors, members of the program committee, and the local organizing committee for contributing to the scientific quality of the workshop

  • 175.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Lindskog, Stefan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Garcia, Johan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    NEWCOM DR6.6: Second report on common frameworks/models matching Department 62006Rapport (Fagfellevurdert)
    Abstract [en]

    Work within Department 6 of NEWCOM is organized into the areas transport protocols, architectures and cross-layer aspects, and modelling. In this deliverable we provide a second report on the frameworks/models used to support research integration within the Department. The integration approach and the defined models/frameworks are described for each one of the three areas of the department. The deliverable also includes an updated report on tools, software libraries and traces that can be shared between the partners

  • 176.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Lindskog, Stefan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Garcia, Johan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    NEWCOM DR6.7: Proceedings of the Newcom Department 6 Second Technical Workshop2006Rapport (Fagfellevurdert)
    Abstract [en]

    The Third Newcom Department 6 Technical Workshop was organized in Catania, Italy, on February 2, 2006. The workshop program contained 4 presentations and contained reports on ongoing integrated research activities as well as presentation intended to initiate additional joint research within the department. All of the three areas of the department, transport protocols, architectures and cross-layer

    aspects, and modelling were represented with presentations. This deliverable contains the presentation material from the workshop. The included presentations are:



    - P2P-based Video transmission in wireless networks

    - Transport Layer Handover using SCTP

    - WIPEMU 4G System Emulation and Sample Results

    - Wireless Networks Emulation



    Where available the presentation notes are also included with the presentations

  • 177.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Lindskog, Stefan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Garcia, Johan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    NEWCOM DR6.9: Proceedings of the Newcom Department 6 Fourth Technical Workshop2006Rapport (Fagfellevurdert)
    Abstract [en]

    The Fourth Newcom Department 6 Technical Workshop was organized in Toulouse, France, on September 13-14, 2006. The workshop program contained 6 presentations and contained reports on ongoing integrated research activities as well as presentation intended to initiate additional joint research activities between the partners. All of the three areas of the department, transport protocols, architectures and cross-layer aspects, and modelling were represented with presentations. This deliverable contains the presentation material from the workshop. The included presentations are:



    - P2P Video Transmission over Heterogeneous Wired/Wireless Networks: A Starting Point for Integrated Research

    - DCCP Overview and First Experiments

    - Estimation of the SCTP Failover Time

    - Improving End to End Goodput of Ad Hoc Networks with SCTP Multihoming

    - A Taxonomy and Survey of SCTP Research

    - Integrating KAUnet and SWINE



    Where available the presentation notes are also included with the presentations

  • 178.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Ottosson, T.
    The Introduction of Soft Information in IP-Based Wireless Networks2001Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The underlying physical link is transparent in most IP-based networks. Contrary to this commonly accepted

    design rule, we propose that the applications should be made aware of the channel conditions. This is especially

    fruitful for wireless links where the performance is many orders of magnitudes lower than in fixed networks.

    Instead of wasting resources to make the wireless link behave as a fixed link, the application could take care of

    the adaptation to the channel condition. The presented solution assumes that soft information consisting of a

    reliability measure of the received bits is produced in the physical layer. This soft information is then propagated

    to the application. The application may use this information to distinguish between errors caused by fading and network congestion. Another possible use for soft information is to make the applications adapt the source and channel codes to the current channel condition and thus maximize performance.

  • 179.
    Brunström, Anna
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Simha, R
    Dynamic versus Static Load Balancing in a Pipeline Computation1997Inngår i: International Journal of Modeling and Simulation. Vol. 17, No 4, 1997, pp317-327Artikkel i tidsskrift (Fagfellevurdert)
  • 180.
    Brännström, Anders
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT.
    Nilsson, Rickard
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT.
    Investigating and Implementing a DNS Administration System2007Independent thesis Advanced level (degree of Magister), 20 poäng / 30 hpOppgave
    Abstract [en]

    NinetechGruppen AB is an IT service providing company with about 30 employees, primarily based in Karlstad, Sweden. The company began to have problems with their DNS administration because the number of administrated domains had grown too large. A single employee was responsible for all the administration, and text editors were used for modifying the DNS configuration files directly on the name servers. This was an error prone process which also easily led to inconsistencies between the documentation and the real world.

    NinetechGruppen AB decided to solve the administrative problems by incorporating a DNS administration system, either by using an existing product or by developing a new sys-tem internally. This thesis describes the process of simplifying the DNS administration procedures of NinetechGruppen AB.

    Initially, an investigation was conducted where existing DNS administration tools were sought for, and evaluated against the requirements the company had on the new system.

    The system was going to have a web administration interface, which was to be developed in ASP.NET 2.0 with C# as programming language. The administration interface had to run on Windows, use SQL Server 2005 as backend database server, and base access control on Active Directory. Further, the system had to be able of integrating customer handling with the domain administration, and any changes to the system information had to follow the Informa-tion Technology Infrastructure Library change management process.

    The name servers were running the popular name server software BIND and ran on two different Linux distributions – Red Hat Linux 9 and SUSE Linux 10.0.

    The investigation concluded that no existing system satisfied the requirements; hence a new system was to be developed, streamlined for the use at NinetechGruppen AB. A requirement specification and a functional description was created and used as the basis for the development. The finalized system satisfies all necessary requirements to some extent, and most of them are fully satisfied.

  • 181. Bubenko jr, Janis
    et al.
    Fischer Hübner, Simone
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Lindskog, Stefan
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Nilsson, Anders G.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för informatik och projektledning.
    Promote IT 2004: Proceedings of the Fourth Conference for the Promotion of research in IT at New Universities and University Colleges in Sweden, 5-7 May, Karlstad University, The Knowledge Foundation, Part 1 and Part 22004Bok (Fagfellevurdert)
    Abstract [sv]

    The Knowledge Foundation of Sweden and Karlstad University are proud to announce the fourth annual conference for promoting research and advanced education in topics of IT at Sweden's new universities and university colleges. The conference takes place at Karlstad University in Sweden, May 5-7, 2004.



    The conference is in the Foundation's programme for promoting research and advanced education in topics of IT at Sweden's new universities and university colleges. Almost 200 MSEK (about 22 MEUR) has been allocated, for a period of five years, in order to increase the number of IT-teachers with a PhD. degree at Sweden's new universities and university colleges.



    Since the start of the programme in year 2000, almost one hundred persons are actively pursuing their graduate studies and research at these new universities and colleges. These are the persons that now present their progress at this conference

  • 182.
    Buckley, Jim
    et al.
    Univ Limerick, Lero CSIS, Limerick, Ireland.
    Herold, Sebastian
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013).
    Pruijt, Leo
    HU Univ Appl Sci, Dept ICT, NL-3513 EX Utrecht, Netherlands.
    The 4th Workshop on Software Architecture Erosion and Architectural Consistency (SAEroCon 2017)2017Inngår i: PROCEEDINGS 11TH EUROPEAN CONFERENCE ON SOFTWARE ARCHITECTURE (ECSA 2017) - COMPANION VOLUME / [ed] Book Group Author(s):ACM, Broadway, New York: Association for Computing Machinery (ACM), 2017Konferansepaper (Annet vitenskapelig)
  • 183. Budurushi, Jurlind
    Volkamer, Melanie
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap.
    "E-Mail made in Germany": Untersuchung der Sicherheitsbeurteilung von E-Mail-Nutzern2016Inngår i: Datenschutz und Datensicherheit - DuD, ISSN 1614-0702, E-ISSN 1862-2607, Vol. 40, nr 5, s. 300-304Artikkel i tidsskrift (Annet vitenskapelig)
  • 184.
    Budurushi, Jurlind
    et al.
    TU Darmstadt/CASED, Germany.
    Jöris, Roman
    TU Darmstadt/CASED, Germany.
    Volkamer, Melanie
    TU Darmstadt/CASED, Germany.
    Implementing and evaluating a software-independent voting system for polling station elections2014Inngår i: Journal of Information Security and Applications, ISSN 2214-2134, E-ISSN 2214-2126, Vol. 19, nr 2, s. 1-10Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In 2009 the German Federal Constitutional Court introduced the principle of “public nature of elections” (Federal Constitutional Court of Germany, March 2009). This principle requires that when using electronic voting systems it must be possible for the citizen to verify the essential steps in the election process and in the ascertainment of the results reliably and without special expert knowledge. Unfortunately, none of the existing systems complies with this principle. As a result, the use of electronic voting systems in Germany for parliamentary elections has stopped. Nevertheless, electronic voting systems are necessary and would improve the situation, especially for elections with complex ballots and voting rules, for example some local elections in Germany or parliamentary elections in Belgium and Luxembourg. The concept proposed by Volkamer et al. (Volkamer et al., 2011) was analyzed by a legal expert and evaluated to comply with the German legal requirements for local elections in the state of Hesse (Henning et al., 2012). In this paper we specify and concretize processes that were left open in the concept, and implement a prototype. We evaluated this prototype in a user study that was conducted alongside the university elections at the Technische Universtität Darmstadt in June 2013. The results of the study show that most of the participants were satisfied with the prototype and would support its use for the upcoming university elections. We also report some lessons learned.

  • 185.
    Budurushi, Jurlind
    et al.
    Technische Universitat Darmstadt.
    Neumann, Stephan
    Technische Universitat Darmstadt.
    Shala, Genc
    Technische Universitat Darmstadt.
    Volkamer, Melanie
    Technische Universitat Darmstadt.
    Entwicklung eines Common Criteria Schutzprofils für elektronische Wahlgeräte mit Paper Audit Trail2014Inngår i: Informatik 2014 - BIG DATA: Komplexität meistern: Elektronische Wahlen: Unterstützung der Wahlprozesse mittels Technik / [ed] Erhard Plödereder, Lars Grunske, Eric Schneider, Dominik Ull, Bonn: Gesellschaft für Informatik , 2014, Vol. 232, s. 1415-1426Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Mit dem Urteil vom 3. Marz 2009 hat das Bundesverfassungsgericht die bislang in der Bundesrepublik Deutschland eingesetzten Wahlgeräte für verfassungswidrig erklart. Grund für dieses Urteil war die fehlende Umsetzung des Prinzips der Öffentlichkeit der Wahl. Mit dem Urteil erklarte das Gericht jedoch nicht grundsätzlich den Einsatz elektronischer Wahlgeräte für verfassungswidrig. Im Rahmen des von der DFG geforderten Projekts ’VerKonWa’ wurde das EasyVote System entwickelt, welches den Öffentlichkeitsgrundsatz durch sogenannte Paper Audit Trails umsetzt. Im Rahmen dieser Arbeit berichten wir über die Erfahrung bei der Entwicklung eines Common Criteria Schutzprofils für elektronische Wahlgeräte mit Paper Audit Trails.

  • 186. Budurushi, Jurlind
    et al.
    Renaud, Karen
    Volkamer, Melanie
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap.
    Woide, Marcel
    An Investigation into the Usability of Electronic Voting Systems for Complex Elections2016Inngår i: Annals ofTelecommunications, ISSN 0003-4347, Vol. 71, nr 7, s. 309-322Artikkel i tidsskrift (Fagfellevurdert)
  • 187.
    Budurushi, Jurlind
    et al.
    CASED, TU Darmstadt, Darmstadt, Germany.
    Stockhardt, Simon
    CASED, TU Darmstadt, Darmstadt, Germany.
    Woide, Marcel
    CASED, TU Darmstadt, Darmstadt, Germany.
    Volkamer, Melanie
    CASED, TU Darmstadt, Darmstadt, Germany.
    Paper Audit Trails and Voters’ Privacy Concerns2014Inngår i: Human Aspects of Information Security, Privacy and Trust: Second International Conference, HAS 2014, Held as Part of HCI International 2014, Heraklion, Crete, Greece, June 22-27, 2014. Proceedings / [ed] Theo Tryfonas, Ioannis Askoxylakis, Cham: Springer, 2014, Vol. 8533, s. 400-409Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Advances in information technology have simplified many processes in our lives. However, in many cases trust issues arise when new technology is introduced, and voting is one prominent example. To increase voters’ trust, current e-voting systems provide paper audit trails (PATs) which enable automatic tally and/or manual audit of the election result. PATs may contain only the encrypted vote or the plaintext vote in human-readable and/or machine-readable format. Previous studies report voter privacy concerns with PATs containing additional information (e.g. QR-Codes) other than the human-readable plaintext vote. However, omitting such PATs negatively influences security and/or efficiency. Hence, to address these concerns we applied the coping and threat appraisal principles of the protection motivation theory in the communication process. We evaluated them in separate surveys focused on the EasyVote system [15]. Results show that the coping appraisal is more promising than the threat appraisal approach. While our findings provide novel directions on addressing privacy concerns in the e-voting context, corresponding limitations need to be considered for future user studies.

  • 188.
    Budurushi, Jurlind
    et al.
    Tech Univ Darmstadt, Dept Comp Sci, Darmstadt, Germany.
    Volkamer, Melanie
    Tech Univ Darmstadt, Dept Comp Sci, Darmstadt, Germany.
    Renaud, Karen
    Univ Glasgow, Sch Comp Sci, Glasgow G12 8QQ, Lanark, Scotland.
    Woide, Marcel
    Tech Univ Darmstadt, Dept Psychol, Darmstadt, Germany.
    Implementation and Evaluation of the EasyVote Tallying Component and Ballot2014Inngår i: 2014 6TH INTERNATIONAL CONFERENCE ON ELECTRONIC VOTING: VERIFYING THE VOTE (EVOTE) / [ed] Krimmer, R; Volkamer, M, IEEE, 2014Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The German federal constitutional court ruled, in 2009, that elections had to have a public nature. EasyVote, a promising hybrid electronic voting system for conducting elections with complex voting rules and huge ballots, meets this requirement. Two assumptions need to hold, however. The first is that voters will verify the human-readable part of the EasyVote ballot and detect discrepancies. Secondly, that electoral officials will act to verify that the human-readable part of the ballot is identical to the machine-readable part, and that they, too, will detect discrepancies. The first assumption was tested in prior work, so in this paper we examine the viability of the second assumption. We developed an EasyVote tallying component and conducted a user study to determine whether electoral officials would detect discrepancies. The results of our user study show that our volunteer electoral officials did not detect all of the differences, which challenges the validity of the second assumption. Based on these findings we proceeded to propose two alternative designs of the EasyVote ballot: (1) In contrast to the original EasyVote ballot, the human-readable part highlights only the voter's direct selections in orange, i.e. votes that are automatically distributed by selecting a party are not highlighted; (2) The second alternative includes only the voter's direct selections and highlights them in orange. Both alternatives reduce the number of required manual comparisons and should consequently increase the number of discrepancies detected by election officials. We evaluated both alternatives in an online survey with respect to ease of verification and understandability of the cast vote, i.e. verifying that the human-readable part contained the voter's selections and understanding the impact (distribution of votes) of the corresponding selections. The results of the online survey show that both alternatives are significantly better than the original EasyVote ballot with respect to ease of verification and understandability. Furthermore, the first alternative is significantly better than the second with respect to understandability of the cast vote, and no significant difference was found between the alternatives with respect to ease of verification of the cast vote.

  • 189.
    Bui, Michael
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap.
    Pedersen, Magnus
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap.
    Implementation of a Log Agent in Microsoft Azure: and packaging it to Azure Marketplace2015Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Cloud computing is still in an early stage of development and Microsoft is now investing considerable amount of resources in the cloud. Microsoft Azure is a cloud platform developed by Microsoft and it is continuously evolving, new features are constantly being added and old features are being updated. Integration Software, which is a company that focuses on products for system integration strongly believes that cloud­-based solutions will have a significant impact on their future. This is why selling and developing solutions and services for the cloud are strategically important for them.

    The objective of this dissertation is to investigate Microsoft Azure in general and Azure Marketplace in particular. This investigation consisted of an implementation of a Microsoft Azure application and integrating this application with Azure Marketplace and evaluating the expenses for running the application. The purpose for this project is to gain practical experience and to work with new techniques and help Integration Software better understand Azure Marketplace.

    The application is a Log Agent which fetches data from an external source and resends the data to an external party (Integration Manager). Our first intention was to package and deploy the application to a newly updated Azure Marketplace. The new Azure Marketplace was never released during this dissertation so we decided to deploy the application to the existing version of Azure Marketplace. This was however not fully successful. We encountered some problems in successfully deploying the application to Azure Marketplace. The evaluations for the cost of running an Azure application were not carried out due to lack of time.

  • 190. Burnett, Robert
    et al.
    Brunström, Anna
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Nilsson, Anders G.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för informatik och projektledning.
    Perspectives on Multimedia: Communication, Media and Information Technology2003Bok (Fagfellevurdert)
    Abstract [en]

    The uses of multimedia are rapidly increasing. Its power to present information in ways not previously possible and its integration of resources, allow for the creation of rich learning environments. The book "Perspectives on Multimedia: Communication, Media and Information Technology" provides a critical examination of the latest multimedia developments and approaches, such as Interface Technology and QoS architectures.



    Topics covered include:

    - The key concepts intrinsic to digital forms of multimedia: integration, interactivity, hypermedia, immersion, narrativity, and hybridity.

    - The development of Informatiuon Technology (IT) usage in society and in the business community.

    - How modern IT enables private companies and public organisations to support business operations, create new business opportunities, and to promote more proactive service management.

    - Multimedia from a computer science perspective and how computer science provides the technical foundation for the computer software and hardware that drives the information usage.



    Gives a broad range of perspectives on key issues for interactive multimedia in organsiations and industry today. This book will be of interest to practioners involved in multimedia development in an organisation, management consultants gviving professional advice on digital solutions and inforamtion technology matters to their customer organisations and academics focusing on business and technical aspects of multimedia frameworks

  • 191.
    Bäck, Henrik
    et al.
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT.
    Andersson, Mathias
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT.
    En anpassningsbar applikationstruktur för flerpunktspekskärmar2009Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Klassisk mus-interaktion har begränsningen att bara en punkt kan aktiveras på skärmen i taget. Interaktionen med de flesta applikationer blir, på grund av detta, sekventiell vilket kan vara en begränsning eftersom människan är van att utforska problem simultant med båda händerna. Flerpunktspekskärmar är en relativt ny teknik som möjliggör nya interaktionsmöjligheter där flera pekpunkter kan vara aktiva simultant. Det här examensarbetet fokuserar på problemen kring att skapa en applikation med användargränssnitt för flerpunktspekskärmar. Applikationen som utvecklats har en grundstruktur vilken är möjlig att vidareutveckla och på så sätt anpassas för att passa nya behov, till skillnad från de implementationer som granskats vid förstudien vilka fokuserar på att lösa specifika problem. Under examensarbetet har också en flerpunktspekskärm byggts av komponenter som kunnat köpas i detaljhandeln.

  • 192.
    Calvo, J.C.
    et al.
    University of Granada, Spain.
    Ortega, J.
    University of Granada, Spain.
    Anguita, M.
    University of Granada, Spain.
    Taheri, Javid
    The University of Sydney, Australia.
    Zomaya, Albert
    The University of Sydney, Sydney, Australia.
    A Method to Improve the Accuracy of Protein Torsion Angles2011Inngår i: International Conference on Bioinformatics Models, Methods and Algorithms (Bioinformatics-2011), Rome, Italy: SciTePress, 2011, s. 297-300Konferansepaper (Fagfellevurdert)
  • 193. Camenisch, Jan
    et al.
    Crispo, Bruno
    Fischer-Hübner, Simone
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap.
    Leenes, Ronald
    Russello, Giovanni
    Privacy and Identity Management for Life: 7th IFIP WG 9.2, 9.6/11.7, 11.4, 11.6 International Summer School, Trento, Italy, September 5-9, 2011. Revised Selected Papers2012Bok (Fagfellevurdert)
  • 194. Camenisch, Jan
    et al.
    Shelat, Abhi
    Sommer, Dieter
    Fischer Hübner, Simone
    Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Avdelningen för datavetenskap. Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, Centrum för HumanIT.
    Hansen, Marit
    Krasemann, Henry
    Lacoste, Gerard
    Leenes, Ronald
    Tseng, Jimmy
    Privacy and Identity Management for Everyone2005Konferansepaper (Fagfellevurdert)
  • 195.
    Canova, Gamze
    et al.
    Technische Universität Darmstadt, Germany.
    Volkamer, Melanie
    Technische Universität Darmstadt, Germany.
    Bergmann, Clemens
    Technische Universität Darmstadt, Germany.
    Borza, Roland
    Technische Universität Darmstadt, Germany.
    NoPhish: An Anti-Phishing Education App2014Inngår i: SECURITY AND TRUST MANAGEMENT (STM 2014) / [ed] S. Mauw & C.D. Jensen, Springer, 2014, s. 188-192Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Phishing is still a prevalent issue in today's Internet. It can have financial or personal consequences. Attacks continue to become more and more sophisticated and the advanced ones (including spear phishing) can only be detected if people carefully check URLs. We developed a game based smartphone app - NoPhish - to educate people in accessing, parsing and checking URLs; i.e. enabling them to distinguish trustworthy and non-trustworthy websites. Throughout several levels information is provided and phishing detection is exercised.

  • 196. Canova, Gamze
    et al.
    Volkamer, Melanie
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013).
    Weiler, Simon
    Poster: Password Entering and Transmission Security2014Annet (Annet vitenskapelig)
    Abstract [en]

    The most popular form of user authentication on websites is the use of passwords. When entering a password, it is crucial that the website uses HTTPS (for the entire content). However, this is often not the case. We propose PassSec - a Firefox Add-On to support users to detect password fields on which their password might be endangered. In addition, PassSec displays a non-blocking warning next to the password field, once users click into the password field. The user is provided with possible consequences of entering a password, recommendations and further information if wanted. 

  • 197.
    Carlsson, Adrian
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013).
    On the Use of 5G for Smart Grid Inter-Substation Control Signaling2019Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    In the energy domain today we are seeing an increasing number of energy equipments used and faceing new challenges such as network reliability, distributed renewable energy, increasing network complexity and energy efficiency. The concept of smart grid control systems has recently been seen as an appropriate way to address these new challenges.

    Today, the IEC 61850 standard is one of the most common standards used for power system automation. One of the services introduced is the so-called Generic Object Oriented Substation Event (GOOSE), which is a protocol to transfer time critical messages between multiple devices in a substation. The 5th generation of mobile networks (5G) are enabling new services and applications requiring lower latency, improved energy efficiency, better reliability and massive connection density. These promises of higher reliability and lower latency could then possibly be used in the future smart grid transmissions.

    In this work, the main goal was to understand the importance of time-critical messages, such as GOOSE messages, in the IEC61850 standard, and how these possibly could be used in the new 5th generation of mobile network. A proposed experimental setup which can be used for future research within both the GOOSE messaging area itself and the Open5GCore for emulated 5G mobile networks is presented. The intension of the experimental study is to send the GOOSE messages traversing through 5G networks by Open5GCore - an emulated 5G software.

  • 198.
    Casas, Israel
    et al.
    The University of Sydney, Sydney, Australia.
    Taheri, Javid
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013).
    Ranjan, Rajiv
    CSIRO, Australia.
    Wang, Lizhe
    School of Computer Science, China University of Geosciences, China.
    Zomaya, Albert
    The University of Sydney, Sydney, Australia.
    GA-ETI: An enhanced genetic algorithm for the scheduling of scientific workflows in cloud environments2018Inngår i: Journal of Computational Science, ISSN 1877-7503, E-ISSN 1877-7511, Vol. 26, s. 318-331Artikkel i tidsskrift (Fagfellevurdert)
  • 199.
    Casas, Israel
    et al.
    Australia.
    Taheri, Javid
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013).
    Ranjan, Rajiv
    Australia, UK.
    Wang, Lizhe
    China.
    Zomaya, Albert Y.
    Australia.
    A balanced scheduler with data reuse and replication for scientific workflows in cloud computing systems2017Inngår i: Future generations computer systems, ISSN 0167-739X, E-ISSN 1872-7115, Vol. 74, s. 168-178Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Cloud computing provides substantial opportunities to researchers who demand pay-as-you-go computing systems. Although cloud provider (e.g., Amazon Web Services) and application provider (e.g., biologists, physicists, and online gaming companies) both have specific performance requirements (e.g. application response time), it is the cloud scheduler’s responsibility to map the application to underlying cloud resources. This article presents a Balanced and file Reuse-Replication Scheduling (BaRRS) algorithm for cloud computing environments to optimally schedule scientific application workflows. BaRRS splits scientific workflows into multiple sub-workflows to balance system utilization via parallelization. It also exploits data reuse and replication techniques to optimize the amount of data that needs to be transferred among tasks at run-time. BaRRS analyzes the key application features (e.g., task execution times, dependency patterns and file sizes) of scientific workflows for adapting existing data reuse and replication techniques to cloud systems. Further, BaRRS performs a trade-off analysis to select the optimal solution based on two optimization constraints: execution time and monetary cost of running scientific workflows. BaRRS is compared with a state-of-the-art scheduling approach; experiments prove its superior performance. Experiments include four well known scientific workflows with different dependency patterns and data file sizes. Results were promising and also highlighted most critical factors affecting execution of scientific applications on clouds. 

  • 200.
    Casas, Israel
    et al.
    University of Sydney, Australia; CSIRO, Data61, Canberra, ACT, Australia.
    Taheri, Javid
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013).
    Ranjan, Rajiv
    Newcastle University, England ; CSIRO, Data61, Canberra, ACT, Australia.
    Zomaya, Albert Y.
    University of Sydney, Australia.
    PSO-DS: a scheduling engine for scientific workflow managers2017Inngår i: Journal of Supercomputing, ISSN 0920-8542, E-ISSN 1573-0484, Vol. 73, nr 9, s. 3924-3947Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Cloud computing, an important source of computing power for the scientific community, requires enhanced tools for an efficient use of resources. Current solutions for workflows execution lack frameworks to deeply analyze applications and consider realistic execution times as well as computation costs. In this study, we propose cloud user-provider affiliation (CUPA) to guide workflow's owners in identifying the required tools to have his/her application running. Additionally, we develop PSO-DS, a specialized scheduling algorithm based on particle swarm optimization. CUPA encompasses the interaction of cloud resources, workflow manager system and scheduling algorithm. Its featured scheduler PSO-DS is capable of converging strategic tasks distribution among resources to efficiently optimize makespan and monetary cost. We compared PSO-DS performance against four well-known scientific workflow schedulers. In a test bed based on VMware vSphere, schedulers mapped five up-to-date benchmarks representing different scientific areas. PSO-DS proved its efficiency by reducing makespan and monetary cost of tested workflows by 75 and 78%, respectively, when compared with other algorithms. CUPA, with the featured PSO-DS, opens the path to develop a full system in which scientific cloud users can run their computationally expensive experiments.

1234567 151 - 200 of 1099
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf