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Visar resultat 1 - 5 av 18 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Causal MMSE Filters for Personal Audio : A Polynomial Matrix Approach

   Författare :Simon Widmark; Mikael Sternad; Anders Ahlén; Lars-Johan Brännmark; Fredrik Gustafsson; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Personal Audio; Audio Pre-compensators; Causal Filters; Elektroteknik med inriktning mot reglerteknik; Electrical Engineering with specialization in Automatic Control;

   Sammanfattning : This thesis is devoted to the study of synthesis of causal filters for generating personal sound zones. Personal sound zones, personal audio or personal sound is the theory and practice of steering sound in such a way that it is amplified in one region and suppressed in another. LÄS MER

3. 2. Development of a therapeutic vaccine against the hepatitis C virus

   Författare :Gustaf Ahlén; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :HCV; NS3; DNA vaccine; electroporation;

   Sammanfattning : The hepatitis C virus (HCV) infection is a major cause of liver disease and it is estimated that 170 million people worldwide are chronically infected by HCV. There are no protective or curable vaccines available for HCV, however treatment consisting of interferon-α and ribavirin is curative in 45-75% of the chronic infected patients, depending on the viral genotype. LÄS MER

4. 3. Carbothermal synthesis of transition metal carbide and carbonitride whiskers via a Vapour-Liquid-Solid (VLS) growth mechanism

   Författare :Niklas Ahlén; Jan Otto Carlsson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; oorganisk kemi; Inorganic Chemistry;

   Sammanfattning : A route for the synthesis of TiC, TiCyN1-y, TaxTi1-xC and TaxTi1-xCyN1-y whiskers via a carbothermal Vapour-Liquid-Solid (VLS) growth mechanism, yielding 70-90 vol.% whiskers, has been established. The whiskers were uniform in diameter (0.3-0. LÄS MER

5. 4. Managing migration in modern welfare states : Essays on the development, causes, and effects of policies regulating family immigration

   Författare :Anton Ahlén; Joakim Palme; Karin Borevi; Axel Cronert; Christian Albrekt Larsen; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Family immigration; Migration policy; Welfare state; Conditionality; Progressive dilemma; Civic integration; Stratification; Policy configurations; Eligibility criteria; Qualifying conditions; Time-series cross-country analysis; Europe; OECD; Statskunskap; Political Science;

   Sammanfattning : Being the main channel of migration into advanced industrial democracies, family migration has been the subject of increasing contestation in political debate. While previous studies have noted that many OECD countries have introduced more restrictive policies on family immigration during the last few decades, we still know little about how cross-country policy configurations in this area have evolved and varied over time, or about how policies affect inflows and why they differ between countries. LÄS MER

7. 5. Robust Sound Field Control for Audio Reproduction : A Polynomial Approach to Discrete-Time Acoustic Modeling and Filter Design

   Författare :Lars-Johan Brännmark; Anders Ahlén; Mikael Sternad; Mathias Johansson; Rodney Kennedy; Uppsala universitet; []
   Nyckelord :Acoustic signal processing; equalizers; error modeling; feedforward control; interpolation; loudspeakers; multivariable filters; polynomials; robustness; sound fields;

   Sammanfattning : This thesis is concerned with the design and analysis of robust discrete-time filters for audio equalization and sound field control in real reverberant environments. Inspired by methods in polynomial control theory, a unified framework for acoustic modeling and filter design is developed. LÄS MER