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Visar resultat 21 - 25 av 692 avhandlingar som matchar ovanstående sökkriterier.

1. 21. On digital radio receiver performance in electromagnetic disturbance environments

   Författare :Peter Stenumgaard; KTH; []
   Nyckelord :digital radio systems; minimum shift keying; electromagnetic interference; military; COTS;

   Sammanfattning : .... LÄS MER

3. 22. Electromagnetic transitions and nuclear structure : radioactive decay and in-beam studies of coincident radiations

   Författare :Kjell Fransson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Nuclear spectroscopy studies including determination of spatial and time distributions of nuclear electromagnetic radiations have been performed in off- and on-line experiments. The following eight nuclei have been the subject of these studies 90Zr, 119Sb, 126Te, 160Dy, 180Hf, 184Pt and 195, 197T1. LÄS MER

4. 23. Modeling of induction stirred ladles

   Författare :Mayur Pal; Pär Jönsson; Pavel Ramirez Lopez; KTH; []
   Nyckelord :induction ladle; electromagnetic; Lorentz forces; magnetic stirrer; magnetic diffusion; Navier-Stokes; FEM;

   Sammanfattning : Over the years numerous computational fluid dynamics models have been developed in order to study the fluid flow in gas and induction stirred ladles. These models are used to gain insight in the industrial processes used in ladle treatment of steel. A unified model of an induction stirred Ladle in two and three dimensions is presented. LÄS MER

5. 24. Inversion and Joint Inversion of Electromagnetic and Potential Field Data

   Författare :Jochen Kamm; Ari Tryggvason; Laust B Pedersen; Mehrdad Bastani; Douglas Oldenburg; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Inversion; Electromagnetic methods; Joint inversion; Potential Field methods; Inversion; Elektromagnetische Verfahren; Joint-Inversion; Potentialverfahren; Geofysik med inriktning mot fasta jordens fysik; Geophysics with specialization in Solid Earth Physics;

   Sammanfattning : In this thesis, four inversion problems of different scale and difficulty are solved. Two of them are electromagnetic inverse problems. Two more are joint inversion problems of potential field data and other types of data. LÄS MER

7. 25. Features and Origin of Electromagnetic Fields Generated by Lightning Flashes

   Författare :Mohd Muzafar Ismail; Vernon Cooray; Farhad Rachidi; Uppsala universitet; []
   Nyckelord :negative cloud-to-ground lightning flashes; HF and VHF radiation; chaotic pulse trains; lightning initiation; zero-crossing time; electromagnetic fields; Engineering Science with specialization in Atmospheric Discharges; Teknisk fysik med inriktning mot atmosfäriska urladdningar;

   Sammanfattning : Negative cloud-to-ground (CG) lightning flashes transport negative charge from cloud to ground. Negative ground flashes typically involve various processes identified as preliminary breakdown, stepped leader, return stroke, dart leader, dart-stepped leader, subsequent return stroke, and cloud activity between strokes, such as regular pulse trains and chaotic pulse trains. LÄS MER