Search for dissertations about: "rate of decay"

Showing result 1 - 5 of 109 swedish dissertations containing the words rate of decay.

2. 1. Effective Spatial Mapping for Coupled Code Analysis of Thermal–Hydraulics/Neutron–Kinetics of Boiling Water Reactors

   Author : Joanna Peltonen; Weimin Ma; Maria Avramova; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Boiling Water Reactor; RELAP5; TRACE; PARCS; Coupled TH NK analysis; Spatial Mapping; Turbine Trip; Feedwater Transient; Control Rod Drop; Reactor Stability; Hierarchical Clustering; kokvattenreaktor; reaktoranalys; RELAP5; TRACE; PARCS; TH NK analys; turbin tripp; matarvatten transient; fallande styrstav; reaktor stabilitet; hierarkisk klustringsmetodik; SRA - Energy; SRA - Energi;

   Abstract : Analyses of nuclear reactor safety have increasingly required coupling of full three dimensional neutron kinetics (NK) core models with system transient thermal–hydraulics (TH) codes.  In order to produce results within a reasonable computing time, the coupled codes use two different spatial description of the reactor core. READ MORE

4. 2. Time-dependent relaxation of charge and energy in electronic nanosystems

   Author : Jens Schulenborg; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; heat current; quantum dot; relaxation rate; rate detection; generalization of hermiticity; nonunitary dynamics; open quantum system; Coulomb charging energy; voltage switch; transient response; electronic nanosystem;

   Abstract : The study of the dynamics of strongly confined, interacting open quantum systems has attracted great interest over the past years, due to potential applications in nanoelectronics, metrology as well as quantum information. Most recent experimental and theoretical research in this field has shifted attention towards electronic heat currents, recognizing their potential for practical purposes as well as for tests of fundamental theories, and also aiming to control the inevitable heat dissipation of any dynamically operated electronic device. READ MORE

5. 3. Durability of timber members : Moisture conditions and service life assessment of bridge detailing

   Author : Jonas Niklewski; Avdelningen för Konstruktionsteknik; []
   Keywords : wood; spruce; moisture; durability; decay; service life; detailing; model;

   Abstract : The longevity of timber structures in exposed outdoor environments is often perceived to be unreliable as compared with that of concrete and steel structures. This situation is exacerbated to some extent by the fact that the European commission for standardization (CEN) currently provides no quantitative method for service life assessment of timber structures. READ MORE

6. 4. On space-time means for solutions of nonlinear Klein-Gordon equations

   Author : Håkan Blomqvist; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; nonlinear Klein-Gordon equation; linear Klein-Gordon equation; asymptotic properties; rate of decay; boundedness of space-time means; properties inherited from the corresponding linear case; nonlinear Volterra integral inequality with singular kernel; nonlinear Klein-Gordon equation;

   Abstract : .... READ MORE

7. 5. Properties and evaluation of volatility models

   Author : Hans Malmsten; Handelshögskolan i Stockholm; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : The general theme of this thesis is theoretical properties and evaluation of volatility models. The thesis consists of four papers. In the first chapter the moment structure of the EGARCH model is derived. The second chapter contains new results on the A-PARCH model. READ MORE