Search for dissertations about: "multidimensional scaling"

Showing result 6 - 10 of 21 swedish dissertations containing the words multidimensional scaling.

2. 6. Working in underground offices

   Author : Edit Nagy; Institutionen för psykologi; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Applied and experimental psychology; multidimensional scaling techniques; multiple sorting task; survey construction; conceptual systems; employee perceptions; underground offices; Work environment; Japan; Japan; Tillämpad och experimentell psykologi;

   Abstract : The present doctoral dissertation discusses Japanese office employees' psychological reactions to their underground work environment. Studies I and III were methodological in nature and aimed at developing and validating instruments to be used in the empirical studies. READ MORE

4. 7. On Perceived Exertion and its Measurement

   Author : Elisabet Borg; Birgitta Berglund; Ana Garriga-Trillo; Stockholms universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Perceptual scaling; psychophysics; Category-Ratio scale; perceived exertion; interindividual comparisons; Psychology; Psykologi; psykologi; Psychology;

   Abstract : The general aim of the thesis is to answer questions on general and differential aspects of perceived exertion and on the measurement of its intensity variation. Overall perceived exertion is commonly treated as a unidemensional construct. This thesis also explores its multidimensional character. Four empirical studies are summarized (Study I-IV). READ MORE

5. 8. Channel-Aware Multilevel Coded Modulation for Coherent Fiber-Optic Communications

   Author : Lotfollah Beygi; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; channel model; multidimensional set partitioning; low-complexity de- tector; coded modulation; signal statistics.; nonlinear phase noise; Fiber-optic communications;

   Abstract : The past decades have shown an ever-increasing demand for high-rate Internet services, motivating a great effort to increase the spectral efficiency of optical networks. In general, fiber-optic links are non-Gaussian, and in contrast to additive white Gaussian noise (AWGN) channels, there is no standard framework for quantifying fundamental limits or designing capacity-approaching coding schemes for such channels. READ MORE

6. 9. Algorithms for the Weighted Orthogonal Procrustes Problem and other Least Squares Problems

   Author : Thomas Viklands; Per-Åke Wedin; Lars Eldén; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Procrustes; weighted; orthogonal; algorithms; global optimization.; Numerical analysis; Numerisk analys;

   Abstract : In this thesis, we present algorithms for local and global minimization of some Procrustes type problems. Typically, these problems are about rotating and scaling a known set of data to fit another set with applications related to determination of rigid body movements, factor analysis and multidimensional scaling. READ MORE

7. 10. Barriers and bridges for introducing agroforestry and community-based forestry among food insecure households in eastern Africa

   Author : Karl-Erik Johansson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

   Abstract : The aim of introducing agroforestry and community-based forestry is to secure and improve livelihoods, maintain and restore ecosystem services, and contribute to climate change mitigation and adaptation. However, the adoption and scaling up of these systems among food insecure communities have proved to be difficult. READ MORE