Sökning: "Jia Jia"

Visar resultat 6 - 10 av 78 avhandlingar innehållade orden Jia Jia.

  1. 6. Dust from mining area and proposal of dust emission factors

    Författare :Qi Jia; John McManus; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Soil Mechanics; Geoteknik;

    Sammanfattning : Mining generates great deal of particulate matter, especially for surface mining. The principle of dust generation is based on the theory of soil wind erosion. This thesis theoretically and experimentally dealt with mining dust. In chapter 1 the development of study on soil erosion by wind and mining dust were introduced. LÄS MER

  3. 7. Estimation of industrial dust using exposure-profiling method

    Författare :Qi Jia; John McManus; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Soil Mechanics; Geoteknik;

    Sammanfattning : Dust is a primary cause for air quality deterioration, as well as a potential health hazard. Mining and construction sites, in particular, are the most profound in dust generation. The possible source activities are drilling, loading, transporting, dumping, crushing, stockpiles, waste rock and unprotected open surfaces, etc. LÄS MER

  4. 8. Turbulence Modelling and Parallel Solver Development Relevant for Investigation of Gas Turbine Cooling Processes

    Författare :Rongguang Jia; Värmeöverföring; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermal engineering; applied thermodynamics; Termisk teknik; termodynamik; large eddy simulation; Reynolds stress transport model; turbulence modelling; multi-block; parallel computing; Impingement cooling; ribbed surface;

    Sammanfattning : To enhance the performance of gas turbine engines, high top-cycle temperatures are desired. However, the temperature is limited by current materials. LÄS MER

  5. 9. Studies on bone and mineral disorders in CKD : determinants and survival implications

    Författare :Ting Jia; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Disruptions in mineral metabolism occur already at an early stage of chronic kidney disease (CKD) and may eventually lead to a complex of CKD - mineral and bone disorders (CKD-MBD) characterized by alterations of the mass, turnover rate, mineralization and strength of bones, and high risk of vascular calcification, fractures and other complications resulting in worse survival. The aim of this thesis was to increase the understanding of some aspects of CKD-MBD with special emphasis on clinical and laboratory determinants and implications for clinical outcome. LÄS MER

  7. 10. Hypoxia-inducible factor-1 (HIF-1) in pancreatic cancer cell aggressiveness and therapeutic resistance and the potential role for pancreatic endocrine cells in islet transplantation

    Författare :Xiaohui Jia; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Tissue hypoxia results from an inadequate supply of oxygen (O2) that compromises biologic functions in various tissues, including both normal and malignant. It is known that a heterodimeric transcription factor hypoxia-inducible factor-1 (HIF-1) mainly mediates this critical adaptation. LÄS MER