Search for dissertations about: "SPM"

Showing result 21 - 25 of 38 swedish dissertations containing the word SPM.

2. 21. The role of the G protein-coupled receptor ChemR23 in cardiovascular inflammation

   Author : Gonzalo Artiach Castañón; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : Cardiovascular inflammation is a biological process characterized by the immune cell response to harmful stimuli within the cardiovascular system, wherein homeostasis is reestablished by neutralizing the insult and promoting the repair of the damaged tissue. However, a failure in the resolution of inflammation can lead to a maladaptive inflammatory response, contributing to the development of cardiovascular diseases such as aortic valve stenosis (AVS) and atherosclerosis, as well as vascular complications such as intimal hyperplasia. READ MORE

4. 22. Nonlinearity mitigation in phase-sensitively amplified optical transmission links

   Author : Kovendhan Vijayan; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; copier-PSA; nonlinearity mitigation; phase-sensitive amplifier; self-phase modulation mitigation; low-noise amplification; optical transmission; crossphase modulation mitigation;

   Abstract : The fundamental limitations in fiber-optic communication are caused by optical amplifier noise and the nonlinear response of the optical fibers. The quantum-limited noise figure of erbium-doped fiber amplifier (EDFA) or any phase-insensitive amplifier is 3 dB. READ MORE

5. 23. Predictive Modelling of Aquatic Ecosystems at Different Scales using Mass Balances and GIS

   Author : Andreas Gyllenhammar; Lars Håkanson; Lars Brydsten; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; mass balance model; dynamic model; scales; marine fish farms; rainbow trout; nutrients; suspended particulate matter; phosphorus; nitrogen; GIS; basin delineation; regionalisation; coastal areas; aquatic foodweb; fishing quotas; Baltic Sea; Archipelago Sea; Okavango Delta; Geovetenskap; Earth sciences; Geovetenskap;

   Abstract : This thesis presents models applicable for aquatic ecosystems. Geographical Information Systems (GIS) form an important part of the thesis. The dynamic mass balance models focus on nutrient fluxes, biotic/abiotic interactions and operate on different temporal and spatial scales (site, local, regional and international). READ MORE

6. 24. Optical Transmission Systems Based on Phase-Sensitive Amplifiers

   Author : Samuel L I Olsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; optical injection locking; fiber nonlinearities; optical fiber communication; fiber nonlinearity mitigation; four-wave mixing; fiber optic parametric amplification; low-noise amplification; phase-sensitive amplification; fibre optics;

   Abstract : The capacity and reach of today's long-haul fiber optical communication systems is limited by amplifier noise and fiber nonlinearities. Conventional, phase-insensitiveamplifiers (PIAs), have a quantum limited noise figure (NF) of 3 dB at high gain, meaning that with a shot-noise limited input signal the signal-to-noise ratio (SNR)is degraded by at least 3 dB. READ MORE

7. 25. STM studies of overlayers on semiconductor or insulator surfaces

   Author : Thorbjörn Jemander; Struan Gray; Linköpings universitet; []
   Keywords : ;

   Abstract : Scanning tunneling microscopy (STM) operated in ultra-high vacuum (UHV) has been used to study overlayers on semiconductor or insulator surfaces. The overlayers have been deposited by magnetron sputtering, thermal evaporation or by gas exposure, and the investigated material systems include Mo on MgO, Ni on SiC, Sn on Si(lll), C on Si(lO0) and O on Si(lll). READ MORE