Sökning: "bed rest"

Visar resultat 1 - 5 av 26 avhandlingar innehållade orden bed rest.

  1. 1. Cardiovascular function after long-term bed rest

    Författare :Jonas Spaak; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Microgravity; simulated weightlessness; carotid baroreflex; static exercise; muscle chemoreflex; orthostasis; tilting; leg exercise; blood pressure; heart rate; stroke volume;

    Sammanfattning : On earth, daily activities involve standing, changes of posture and various types of muscle action, all of which challenge the cardiovascular regulation. Removal of the orthostatic stress for a longer period, as during spaceflight or head-down tilt bed rest, consistently results in cardiovascular deconditioning. LÄS MER

  3. 2. Packed-Fluidized Bed Reactors – Batch Experiments and Fundamental Modeling with Random Metal Packings

    Författare :Nasrin Nemati; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bubbling fluidized bed; Heat transfer; Confined fluidization; Chemical-looping combustion; Mass transfer; Random packing; Packed-fluidized bed;

    Sammanfattning : The aim of this work is to investigate the effect of random packings on heat and mass transfer phenomena, when applied in bubbling fluidized beds. For this purpose, first, the heat transfer coefficient to a horizontal tube submerged in a fluidized bed containing various types of random packings was investigated. LÄS MER

  4. 3. Performance and Flotation-REST in Tests of Marksmanship, Problem-solving and Perceived Exertion

    Författare :Henrik Bergman; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Flotation-REST; archery; performance; primary- and secondary process; creativity; originality; EMG;

    Sammanfattning : This present thesis examines whether or not relaxation as floating may be exploited to reinforce primary process (inner-directed) orientation, and thereby enhance performance, creative problem-solving ability and originality. Two Articles are presented both using randomized factorial design. Article I include two subexperiments. LÄS MER

  5. 4. High-performance Nickel-based Superalloys for Additive Manufacturing

    Författare :Jinghao Xu; Johan Moverare; Ru Peng; Chinnapat Panwisawas; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nickel-based superalloy; Alloy design; Laser powder bed fusion; Cracking susceptibility; Additive manufacturability; Heat treatment; γ′ precipitate; High-temperature mechanical property; Creep; Oxidation;

    Sammanfattning : Additive manufacturing (AM), e.g., laser powder bed fusion (LPBF) technique, has become a powerful manufacturing process for producing metallic components with the advantages of design freedom, net-shape-forming flexibility, product customization, and reduced lead time to market. LÄS MER

  7. 5. Integrated Computational and Experimental Study of Additively Manufactured Steels

    Författare :Chia-Ying Chou; Greta Lindwall; Joakim Odqvist; Annika Borgenstam; Johan Moverare; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Additive Manufacturing; Powder Bed Fusion – Laser Beam; Computational Thermodynamics and Kinetics; Hot-work Tool Steel; Ferritic Stainless Steel; Additiv tillverkning; Powder Bed Fusion – Laser Beam; Tillämpad termodynamik och kinetik; Varmarbetsverktygsstål; Ferritiska rostfria stål; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : The design freedom Additive Manufacturing (AM) offers provides new solutions for improving functionality in industrial applications. It also offers unique opportunities when it comes to materials design. LÄS MER