Sökning: "Hans-erik Nilsson"

Visar resultat 21 - 25 av 29 avhandlingar innehållade orden Hans-erik Nilsson.

  1. 21. Modelling of antenna robustness

    Författare :Torbjörn Olsson; Hans-Erik Nilsson; Andrei Koptioug; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Antenna; robust; Monte Carlo; methodology; bootstrap; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

    Sammanfattning : .... LÄS MER

  3. 22. Radiation induced losses in Ytterbium doped laser materials

    Författare :Sara Rydberg; Magnus Engholm; Hans-Erik Nilsson; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : In this work, two types of ytterbium (Yb) doped laser materials are studied, crys-talline Yb:YAG and amorphous Yb/Al silica in both preform and fiber. Yb is suitableas a laser ion because of its simple energy level structure and low quantum defect. LÄS MER

  4. 23. On the Design, Characterization and Optimization of RFID Tag Antennas

    Författare :Johan Sidén; Hans-Erik Nilsson; Heikki Seppä; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Other electrical engineering; electronics and photonics; Övrig elektroteknik; elektronik och fotonik;

    Sammanfattning : Remotely read electronic identification tags are establishing as the standard method of identifying objects in transport logistcs. They are referred to as RFID tags and with successful research and development they are likely to one day replace all of todays barcodes, found on a wide variety of items and objects. LÄS MER

  5. 24. Monte Carlo simulation of electron transport in semiconducting zigzag carbon nanotubes

    Författare :Kannan Thiagarajan; Ulf Lindefelt; Hans-Erik Nilsson; Michele Goano; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Carbon nanotubes; Monte Carlo method; drift velocity; mobility; electron-phonon scattering; and electron-defect scattering.;

    Sammanfattning : Since the advent of nanoscale material based electronic devices, there has been a considerable interest in exploring carbon nanotubes from fundamental science and technological perspectives. In carbon nanotubes, the atoms form a cylindrical structure with a diameter of the order 1nm. LÄS MER

  7. 25. Tight-binding calculations of electron scattering rates in semiconducting zigzag carbon nanotubes

    Författare :Kannan Thiagarajan; Ulf Lindefelt; Hans-Erik Nilsson; Sven Öberg; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Tight-binding; carbon nanotubes; electron-phonon scattering; backscattering; forward scattering; Semiconductor physics; Halvledarfysik;

    Sammanfattning : The technological interest in a material depends very much on its electrical, magnetic, optical and/or mechanical properties. In carbon nanotubes the atoms form a cylindrical structure with a diameter of the order 1 nm, but the nanotubes can be up to several hundred micrometers in length. LÄS MER