Sökning: "sis"

Visar resultat 16 - 20 av 94 avhandlingar innehållade ordet sis.

1. 16. Theoretical and experimental studies of the flux-flow type Josephson oscillator

   Författare :Yongming Zhang; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nb NbOx PbBi tunnel junction; resistive loading; effect of self-field; resonant fluxion motion; velocity-matching step; chaotic phenomena; SIS detector; optimum bias feed; uniform bias feed; open-circuit boundary condition; perturbed sine-Gordon qeuation; reactive ion beam oxidation; effect of damping; one dimensional Josephson junction; flux-flow type Josephson oscillator;

   Sammanfattning : .... LÄS MER

3. 17. Low Noise SIS Mixers and Cryogenic Amplifiers for Sub-Millimeter Astronomy

   Författare :Christophe Risacher; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This PhD thesis presents the work that was done developing radioastronomy instrumentation. The first part of this work deals with 2-stage low-noise cryogenic amplifiers using commercial GaAs HEMT transistors for frequency bnads: 3.4-4.6 GHz, 4-8 GHz and 8-9 GHz. LÄS MER

4. 18. Low noise cryogenic amplifiers and SIS mixers for radio astronomy receivers

   Författare :Christophe Risacher; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : .... LÄS MER

5. 19. Towards 0.5 THz Sideband Separation SIS Mixer for Radio Astronomy Receivers

   Författare :Raquel Monje; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : .... LÄS MER

7. 20. Adsorption and frictional properties of surfactant assemblies at surfaces

   Författare :Katrin Boschkova; KTH; []
   Nyckelord :lubrication; friction; adsorption; surfactants; shear-induced-structures SIS ;

   Sammanfattning : .... LÄS MER