Sökning: "A Ivanov"

Visar resultat 1 - 5 av 18 avhandlingar innehållade orden A Ivanov.

1. 1. A Transnational Study of Criticality in the History Learning Environment

   Författare :Sergej Ivanov; Janet Enever; Rodney Jones; Umeå universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; criticality; transnational; curriculum theory; policy; upper secondary; history; learning environment; comparative; language teaching and learning; språkdidaktik;

   Sammanfattning : This study examines conceptions of criticality and its instruction in the History learning environ- ment in Sweden, Russia, and Australia as evidenced in one sample upper secondary class in each country. To achieve this, data were collected at macro, micro and meso levels. LÄS MER

3. 2. Never let go! The etiology, clinical presentation and treatment of hoarding disorder

   Författare :Volen Ivanov; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Background: Hoarding disorder (HD) is characterized by difficulties discarding possessions which results in clutter that is impeding and causes distress. Retrospective reports suggest HD debuts in childhood or adolescence but very little is known about the prevalence, presentation and etiology of hoarding in young people. LÄS MER

4. 3. Boundary Layer Approximate Approximations and Cubature of Potentials in Domains

   Författare :Tjavdar Ivanov; Per Lötstedt; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The goal of this thesis is to develop efficient numerical algorithms for approximation of functions defined on domains and apply these algorithms to obtain accurate semi-analytic cubature formulae for various integral operators. These algorithms are based on the method of "approximate approximations", introduced by V. Maz'ya in 1991. LÄS MER

5. 4. On Bit-Wise Decoders for Coded Modulation

   Författare :Mikhail Ivanov; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bit-error probability; L-values; labeling; Gray code; coded modulation; log-likelihood ratio; maximum likelihood decoder; Additive white Gaussian noise; quadrature amplitude modulation.; interleaver; flat fading channel; pairwise error probability;

   Sammanfattning : Coded modulation is a technique that emerged as a response to the growing demand for high data rates. It was devised to achieve high spectral efficiency with high reliability, potentially approaching Shannon’s capacity. The main idea of coded modulation consists in combining error-correcting coding with higher-order modulation. LÄS MER

7. 5. Bit-Wise Decoders for Coded Modulation and Broadcast Coded Slotted ALOHA

   Författare :Mikhail Ivanov; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mutual information; vehicular communications; bit-interleaved coded modulation; error floor; slotted ALOHA; medium access control; All-to-all broadcast;

   Sammanfattning : This thesis deals with two aspects of wireless communications. The first aspect is about efficient point-to-point data transmission. To achieve high spectral efficiency, coded modulation, which is a concatenation of higher order modulation with error correction coding, is used. LÄS MER