Search for dissertations about: "elektronik och fotonik"

Showing result 16 - 20 of 116 swedish dissertations containing the words elektronik och fotonik.

  2. 16. Wind Power in Areas with Limited Export Capability

    Author : Julija Matevosyan; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wind power; transmission capacity; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik; Manufacturing engineering and work sciences; Produktion och arbetsvetenskap;

    Abstract : During the last two decades, increase in electricity demand and environmental concern resulted in fast growth of power production from renewable sources. Wind power is one of the most efficient alternatives. READ MORE

  4. 17. Plasmonic waveguides and resonators for optical communication applications

    Author : Yi Song; Min Qiu; Ping Shum; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Plasmonic; Photonics; Fotonik;

    Abstract : Photonic circuits can transmit data signals in a much higher speed thanconventional electronic circuits. However, miniaturization of photonic circuitsand devices is hindered by the existence of light diffraction limit. A promisingsolution to this problem is by exploiting plasmonic systems for guiding andmanipulating signals at optical frequencies. READ MORE

  5. 18. Slow and stopped light by light-matter coherence control

    Author : Jonas Tidström; Lars Thylén; Mauritz Andersson; Jesper Mørk; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; slow light; stored light; stopped light; light-matter coherence; electromagnetically induced transparency; rubidium atoms; Physics; Fysik; Photonics; Fotonik;

    Abstract : In this thesis we study light-matter coherence phenomena related to the interaction of a coherent laser field and the so-called Λ-system, a three-level quantum system (e.g., an atom). We observe electromagnetically induced transparency (EIT), slow and stored light in hot rubidium vapor. READ MORE

  6. 19. Wireless video sensor network and its applications in digital zoo

    Author : Johannes Karlsson; Haibo Li; Jerry Eriksson; Oliver Wu Dapeng; Umeå universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wireless Sensor Networks; Wireless ad-hoc Networks; Digital Zoo; Video Compression; Real-Time Video Communication; Object Tracking; Sensor Fusion; Other electrical engineering; electronics and photonics; Övrig elektroteknik; elektronik och fotonik; signalbehandling; Signal Processing;

    Abstract : Most computing and communicating devices have been personal computers that were connected to Internet through a fixed network connection. It is believed that future communication devices will not be of this type. Instead the intelligence and communication capability will move into various objects that surround us. READ MORE

  7. 20. Very low bitrate facial video coding : based on principal component analysis

    Author : Ulrik Söderström; Haibo Li; Umeå universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Image processing; Video processing; Very low bitrate coding; Other electrical engineering; electronics and photonics; Övrig elektroteknik; elektronik och fotonik;

    Abstract : This thesis introduces a coding scheme for very low bitrate video coding through the aid of principal component analysis. Principal information of the facial mimic for a person can be extracted and stored in an Eigenspace. Entire video frames of this persons face can then be compressed with the Eigenspace to only a few projection coefficients. READ MORE