Sökning: "Dams"

Visar resultat 1 - 5 av 121 avhandlingar innehållade ordet Dams.

  1. 1. Condition assessment of concrete dams in cold climate

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Rikard Hellgren; Anders Ansell; Richard Malm; Anders Wiberg; Fernando Salazar González; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dam safety; dams; data analysis; monitoring; statistical models; hydraulic structures; static ice loads; concrete dams; cold regions; Betongbyggnad; Concrete Structures;

    Sammanfattning : Dams in many countries are approaching their expected service life. Proper assessment of the aging dams structural health increase the knowledge of the current safety, and allow for better planning of renovation and rebuilding investments. LÄS MER

  2. 2. Functionalization of spider silk with affinity and bioactive domains via genetic engineering for in vitro disease diagnosis and tissue engineering

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Naresh Thatikonda; My Hedhammar; Hanna Dams Kozlowska; [2018]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; affinity domains; artificial ECM; basic fibroblast growth factor; functionalization; mammalian cell culture; micro-and nano arrays; partial spider silk; single chain variable fragments; Biotechnology; Bioteknologi;

    Sammanfattning : In the recent past, spider silk has drawn significant attention from researchers mainly due to its distinguished mechanical strength, elasticity, biocompatibility and biodegradability. Technological advancements in genetic engineering have resulted in methods for creation of partial spider silk proteins. LÄS MER

  3. 3. Automated performance monitoring of concrete dams

    Detta är en avhandling från Avd. för Teknisk Geologi

    Författare :Christian Bernstone; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrogeologi; teknisk geologi; geographical and geological engineering; Maintenance; Uplift pressure; Crack; Deformation; Image processing; Dams; Condition monitoring; Time-domain reflectometry; GPS; Image analysis; Concrete structures; teknisk geografi; Hydrogeology;

    Sammanfattning : The Swedish hydropower industry operates a large number of power plants and dams geographically spread over the country. The level of safety of a specific dam is to a large extent determined during the design and construction phases that in the case of Swedish hydropower plants took place several decades ago. LÄS MER

  4. 4. Subsurface dams in water resource management methods for assessment and location

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Imran Ali Jamali; Bo Olofsson; Stephen Foster; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Subsurface dams; Groundwater; GIS; Regolith thickness; Groundwater; Civil and Architectural Engineering; Byggvetenskap;

    Sammanfattning : Natural groundwater storage can be improved by constructing a subsurface barrier that is a subsurface dam, in order to capture the subsurface flows and raise the groundwater levels (GWLs) in the sediment layers. Subsurface dams are preferable to surface dams because of lower evaporation, higher functionality, lower cost of construction, lessened risk for contamination and the possibility of utilizing land over the dam. LÄS MER

  5. 5. Ecohydrologic impacts of dams A global assessment

    Detta är en avhandling från Umeå : Ekologi, miljö och geovetenskap

    Författare :Catherine Reidy Liermann; Christer Nilsson; Angela Arthington; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; dam; reservoir; river regulation; flow alteration; fragmentation; freshwater biodiversity; NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences Hydrology; NATURVETENSKAP Geovetenskap Atmosfärs- och hydrosfärsvetenskap Hydrologi;

    Sammanfattning : This dissertation aims to improve our understanding of how dams and reservoirs impact freshwater systems worldwide. The following questions were addressed specifically: 1) what are the spatial patterns and magnitudes of flow regulation and channel fragmentation by dams globally; 2) how are dam impacts distributed biogeographically, and which are the biogeographic regions and taxa most threatened by dam impacts; and 3) how can climate change and dams be expected to interact in basins, and what management actions would mitigate adverse interactions? Results show that the majority of the world’s large river systems are fragmented and have their flow altered by dams. LÄS MER