Change search
Refine search result
1 - 4 of 4
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Delsing, Jerker
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Ekman, Jonas
    Johansson, Jonny
    Sundberg, Sofia
    Bäckström, Mats
    Swedish Defence Research Agency FOI, Division of Sensor Technology.
    Nilsson, T.
    Swedish Defence Research Agency FOI, Division of Sensor Technology.
    Susceptibility of sensor networks to intentional electromagnetic interference2006In: 2006 17th International Zurich Symposium on Electromagnetic Compatibility: Suntec City, Singapore, 28 February - 3 March 2006, Piscataway, NJ: IEEE Communications Society, 2006, p. 172-175Conference paper (Refereed)
    Abstract [en]

    It is reasonable to think that sensor networks might be part of society critical systems in the future. Therefor this paper discusses and shows the vulnerabilities of sensor networks to intentional electromagnetic interference (IEMI). Principle ways of sensor network IEMI is addressed and followed by a discussion on schemes for protection. Experimental results for both in-band and exband interference from low- and high- level sources is reported. It is obvious that more emphasis has to be put on sensor networks susceptibility to IEMI, and in particular more experimental data is needed.

  • 2.
    Jonsson, Håkan
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Sundberg, Sofia
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    On the problem of computing zookeeper routes2004Report (Other academic)
    Abstract [en]

    The Zookeeper's Problem is a shortest-path problem that, given a simple polygon (a zoo) containing a set of disjoint convex polygons (cages) attached to the boundary of the zoo, asks for a shortest route (closed path) in the zoo that intersects the boundaries of all cages without entering their interiors. The literature contains several algorithms for variants of this problem some of which compute exact and some approximate solutions. However, no implementations have been reported. Moreover, concerns have also been raised about the numerical properties of the algorithms that compute exact solutions. In this paper we present a study of two algorithms for the Zookeeper's Problem. One of them compute exact solutions and the other provably good approximations. We give observations about the algorithms and the solutions they compute. We also present an experimental study based on an implementation of the algorithms in Java.

  • 3. Sundberg, Sofia
    et al.
    Ekman, Jonas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Modeling antenna characteristics using PEEC models2006In: Proceedings of the Nordic Antenna Symposium, Försvarets materielverk , 2006Conference paper (Refereed)
  • 4. Sundberg, Sofia
    et al.
    Ekman, Jonas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    PEEC modeling of antenna characteristics2006In: 2006 IEEE International Symposium on Electromagnetic Compatibility: [2006 IEEE EMC] ; Portland, Oregon, USA, 14 - 18 August 2006, Piscataway, NJ: IEEE Communications Society, 2006, p. 580-585Conference paper (Refereed)
    Abstract [en]

    Electromagnetic modeling of antenna characteristics can be performed using different methods. This papers deals with antenna modeling using Partial Element Equivalent Circuit (PEEC) models. Antenna properties including input impedance, radiation diagrams and gain are computed from PEEC model results. The input impedance is computed directly by using the currents and voltages at the feed-point of the antenna. The radiation diagrams are computed in a post-processing step by treating each volume cell as an infinitesimal dipole and using the superposition principle to compute the radiated field. The computed results are compared to analytical results for dipoles. For more complex antenna structures the computed results are compared with measurements and results from other computational methods. Accurate and fast results shows that the method is promising as an antenna system design tool.

1 - 4 of 4
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf