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Visar resultat 1 - 5 av 79 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Extremely low and microwave frequency electromagnetic fields : influence on biological systems

   Författare :Elisabeth Saalman; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Electromagnetic fields; extremely low frequency; diatom motility; biological effects; cyclotron resonance Chinese hamster V79 cells; membrane permeability transmembrane channels; liposomes; microwave frequency;

   Sammanfattning : .... LÄS MER

3. 2. Pulsed Electric Field Food Treatment and Low Frequency Bioelectromagnetics

   Författare :Martin Lindgren; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; extremely low frequency; non-thermal microbial inactivation; electromagnetic fields; biological effects; treatment chambers; electric field distribution; magnetic fields; pulsed electric fields;

   Sammanfattning : This thesis is divided in two parts, both of which address the interaction between biological cells (especially cell membranes) and electromagnetic fields. The first part deals with the application of intense pulsed electric fields (PEF) in foods. It is intended to be a non-thermal method to inactivate microorganisms. LÄS MER

4. 3. Graphene field-effect transistors for high frequency applications

   Författare :Muhammad Asad; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high frequency; Graphene; transit frequency; transconductance; maximum frequency of oscillation; contact resistance; microwave electronics; field-effect transistors;

   Sammanfattning : Rapid development of wireless and internet communications requires development of new generation high frequency electronics based on new device concepts and new materials. The very high intrinsic velocity of charge carriers in graphene makes it promising new channel material for high frequency electronics. LÄS MER

5. 4. GaN-based HEMTs for Cryogenic Low-Noise Applications

   Författare :Mohamed Aniss Mebarki; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cryogenic temperatures; superconductivity; RFI; High Electron Mobility Transistor HEMT ; Low Noise Amplifier LNA ; Niobium Nb ; Radio-astronomy; Gallium Nitride GaN ; high frequency;

   Sammanfattning : Radio-astronomy deals with signals and radiations of extremely weak intensity. Also, it requires robust and rugged technologies able to sustain and prevent the Radio Frequency Interferences (RFI). LÄS MER

7. 5. Extremly low frequency magnetic fields and breast cancer

   Författare :Ulla Forssén; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Extremely low frequency magnetic fields (ELF EMF) arise around all electrical leaders and equipment that is ran by electricity. In our modem society basically everyone is therefore to some extent exposed to magnetic fields. LÄS MER