Search for dissertations about: "noise factors"

Showing result 6 - 10 of 216 swedish dissertations containing the words noise factors.

2. 6. GaN HEMT Low Frequency Noise Characterization for Low Phase Noise Oscillator Design

   Author : Thi Ngoc Do Thanh; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Low frequency noise; flicker noise; phase noise; deposition method.; oscillator; VCO; GaAs pHEMT; MMIC; GaN HEMT; passivation; InGaP HBT;

   Abstract : The thesis presents low frequency noise (LFN) characterization of Gallium Nitride (GaN) High Electron Mobility Transistors (HEMTs) for low phase noise oscillator design. First, GaN HEMT technology is benchmarked versus other transistor technologies, e.g. READ MORE

4. 7. Noise and music : a matter of risk perception

   Author : Stephen E. Widén; Högskolan Väst; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Adolescents; Tinnitus; Noise sensitivity; Socio-economic status; Attitudes; Use of hearing protection; Risk behaviour; Risk-consideration; Self-image; Norms and Ideals; Psychology; Psykologi; Psychology; Psykologi; Adolescents; Tinnitus; Noise sensitivity; Socio-economic status; Attitudes; Use of;

   Abstract : The prevalence of tinnitus and hearing impairments among adolescents seems to increase as a consequence of exposure to loud noise. Several studies have highlighted the negative auditory effects of exposure to loud music at concerts and discotheques, environments in which young people today spend considerable periods of time. READ MORE

5. 8. Psychological responses to noise and vibration

   Author : Jessica Körning-Ljungberg; Greg Neely; Ronnie Lundström; Kerstin Persson Waye; Umeå universitet; []
   Keywords : Psychology; Cognitive; Cortisol; Noise; Vibration; Occupational; Vehicle; Weinstein; Occupational; Vehicle; Weinstein; Weinstein; Psykologi; Psychology; psykologi;

   Abstract : Vehicle drivers are a group of workers that are exposed to noise and whole-body vibration (WBV) several hours a day. Some drivers may also be exposed to high mental loads – monitoring and manipulating physical controls while engaging problem solving activities often with strong short-term memory and spatial manipulation components. READ MORE

6. 9. Understanding the Noise : Spliceosomal snRNA Profiling

   Author : Lei Liu Conze; Anders Virtanen; Lars Wieslander; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; ncRNA; snRNA; U1; splice site; alternative splicing; high-throughput sequencing; 454; SNP; Molekylär cellbiologi; Molecular Cellbiology;

   Abstract : The concept of the gene has been constantly challenged by new discoveries in the life sciences. Recent challenging observations include the high frequency of alternative splicing events and the common transcription of non-protein-coding-RNAs (ncRNAs) from the genome. The latter has long been considered noise in biological systems. READ MORE

7. 10. Environmental intolerance : psychological risk and health factors

   Author : Eva Palmquist; Steven Nordin; Gregory Neely; Berndt Stenberg; Michael Witthöft; Umeå universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Environmental intolerance; stress; anxiety; depression; burnout; prognosis; recovery; spreading; coping; social support; co-prevalence; Västerbotten Environmental Health Study; idiopathic environmental intolerance; multiple chemical sensitivity; sick building syndrome; noise sensitivity; electromagnetic hypersensitivity; Psychology; psykologi; Epidemiology; epidemiologi;

   Abstract : Environmental intolerance (EI) is an embracing term for a number of conditions characterized by a wide range of non-specific symptoms attributed to certain environmental exposures (e.g. pungent/odorous chemicals, residing in a certain building, electromagnetic fields and everyday sounds). EI often leads to lifestyle alterations (e. READ MORE