Sökning: "A Niemi"

Visar resultat 11 - 15 av 45 avhandlingar innehållade orden A Niemi.

1. 11. Dynamics of Discrete Curves with Applications to Protein Structure

   Författare :Shuangwei Hu; Antti J. Niemi; Maxim Zabzine; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Frenet equations; integrable model; folded proteins; discrete curves; Fysik; Physics; Physical Biology; Fysikalisk biologi;

   Sammanfattning : In order to perform a specific function, a protein needs to fold into the proper structure. Prediction the protein structure from its amino acid sequence has still been unsolved problem. The main focus of this thesis is to develop new approach on the protein structure modeling by means of differential geometry and integrable theory. LÄS MER

3. 12. Analytic Element Models for Groundwater Flow and Linear Elasticity in Fractured Rocks

   Författare :Erik Toller; Auli Niemi; Otto Strack; Qinghua Lei; James Craig; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Analytic element method; fractures; tunnels; complex variables; linear elasticity; groundwater; fractured rock; Hydrology; Hydrologi;

   Sammanfattning : There is an increasing demand for using deep underground space at various scales, such as small-scale geothermal wells and large-scale projects like tunnels or nuclear waste disposal. The deep underground space in fractured rock is a heterogeneous and challenging medium. LÄS MER

4. 13. Upscaling of Flow, Transport, and Stress-effects in Fractured Rock

   Författare :Johan Öhman; Auli Niemi; Ove Stephansson; Robert W Zimmerman; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hydrology; Upscaling; fractured media; flow; solute transport; thermo-hydro-mechanical processes; hybrid approach; continuum approximation; discrete fracture network; stochastic continuum; Hydrologi; Hydrology; Hydrologi;

   Sammanfattning : One of many applications of geohydraulic modelling is assessing the suitability of a site to host a nuclear waste repository. This modelling task is complicated by scale-dependent heterogeneity and coupled thermo-hydro-mechanical (THM) processes. LÄS MER

5. 14. Field Theories and Vortices with Nontrivial Geometry

   Författare :Kristel Torokoff; Antti Niemi; Masud Chaichian; Uppsala universitet; []
   Nyckelord :Theoretical physics; theoretical physics; gauge field theory; knot theory; spontaneously broken symmetry; effective model; numerical calculation; soliton; vortex; electromagnetic plasma; Teoretisk fysik;

   Sammanfattning : This thesis investigates aspects of field theories and soliton solutions with nontrivial topology. In particular we explore the following effective models: a limited sector of the scalar Electroweak theory called extended Abelian Higgs model, and a classical mechanics model derived from the low energy SU(2) Yang-Mills theory. LÄS MER

7. 15. CO2 storage in deep saline aquifers : Models for geological heterogeneity and large domains

   Författare :Liang Tian; Auli Niemi; Fritjof Fagerlund; Simon Mathias; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; CO2; Carbon Capture Storage; Storage Capacity; Injectivity; Monte Carlo; Gaussian; Permeability; Upscaling; 二氧化碳; 地質封存; 高斯仿真; 滲透係數; 非均質性; 升尺度; 存儲效能; 場地模擬; 不確定性; 壓力累積;

   Sammanfattning : This work presents model development and model analyses of CO2 storage in deep saline aquifers. The goal has been two-fold, firstly to develop models and address the system behaviour under geological heterogeneity, second to tackle the issues related to problem scale as modelling of the CO2 storage systems can become prohibitively complex when large systems are considered. LÄS MER