Search for dissertations about: "electromagnetic waves"

Showing result 6 - 10 of 122 swedish dissertations containing the words electromagnetic waves.

2. 6. VLF and ULF Waves Associated with Magnetospheric Substorms

   Author : Andrew Collier; Lars Blomberg; James McKenzie; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Space physics; Subtorms; Magnetosphere; VLF waves; ULF waves; Space physics; Rymdfysik;

   Abstract : A magnetospheric substorm is manifested in a variety of phenomena observed both in space and on the ground. Two electromagnetic signatures are the Substorm Chorus Event (SCE) and Pi2 pulsations. The SCE is a Very Low Frequency (VLF) radio phenomenon observed on the ground after the onset of the substorm expansion phase. READ MORE

4. 7. Electromagnetic Waves in Media with Ferromagnetic Losses

   Author : Jörgen Ramprecht; Martin Norgren; Constantin Simovski; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrophysics; Elektrofysik;

   Abstract : The operation of a wide variety of applications in today's modern society are heavily dependent on the magnetic properties of ferromagnetic materials and their interaction with electromagnetic fields. The understanding of these interactions and the associated loss mechanisms is therefore crucial for the improvement and future development of such applications. READ MORE

5. 8. Secondary Electromagnetic Radiation Generated by HF Pumping of the Ionosphere

   Author : Lars Norin; Bo Thidé; Savely M. Grach; Bengt Gustafsson; James W. LaBelle; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; space physics; ionospheric modification experiments; plasma turbulence; stimulated electromagnetic emission; ionospheric irregularities; radio waves; parametric processes; thermal parametric instability; transient dynamics; wave-wave interactions; Physics; Fysik;

   Abstract : Electromagnetic waves can be used to transmit information over long distances and are therefore often employed for communication purposes. The electromagnetic waves are reflected off material objects on their paths and interact with the medium through which they propagate. READ MORE

6. 9. Sensitivity Analysis and Material Parameter Estimation using Electromagnetic Modelling

   Author : Therese Sjödén; Sven Nordebo; Börje Nilsson; Margaret Cheney; Linnéuniversitetet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sensitivity analysis; material parameter; Fisher information; Cramér-Rao bound; electromagnetic modelling; grain angle; wood; electrical impedance tomography; inverse problems; känslighetsanalys; estimering; materialparameter; Fisher- information; Cramér-Rao-gränsen; elektromagnetisk modellering; fibervinkel; trä; elektrisk impedanstomografi; inversa problem; Waves; Signals and Systems; Vågor; signaler och system;

   Abstract : Estimating parameters is the problem of finding their values from measurements and modelling. Parameters describe properties of a system; material, for instance, are defined by mechanical, electrical, and chemical parameters. Fisher information is an information measure, giving information about how changes in the parameter effect the estimation. READ MORE

7. 10. Radiant Textiles : Designing electromagnetic textile systems

   Author : Erin Lewis; Tincuta Heinzel; Högskolan i Borås; []
   Keywords : HUMANIORA; HUMANITIES; smart textiles; electromagnetism; textile design; design methods; artistic research; Textiles and Fashion Design ; Textil och mode konstnärlig ;

   Abstract : To regard the electromagnetic domain of conductive textiles is to unlock a realm of expressive possibilities. The underexplored area of the electromagnetic domain in con­ductive textiles implies that numerous computational and electronic textiles created thus far possess untapped capabilities. READ MORE