Sökning: "physical test"

Visar resultat 21 - 25 av 1020 avhandlingar innehållade orden physical test.

1. 21. A Source-Based Test-Bed for Fast-Neutron Irradiation

   Författare :Julius Scherzinger; Kärnfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The "3He crisis" has resulted in a major effort worldwide to develop replacement neutron-detector technologies. Such technologies are in their infancy and need to be thoroughly tested before becoming mainstream. Neutron sources for controlled irradiation include accelerators, nuclear reactors and radioactive sources. LÄS MER

3. 22. Study of the Superconducting Medium Beta Cavity of the European Spallation Source

   Författare :Saeid Pirani; Partikel- och kärnfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SRF elliptical cavity; higher order mode; Qext; field emission; elliptical cavity design; vertical test; Fysicumarkivet A:2020:Pirani;

   Sammanfattning : The thesis explains the design, fabrication, vertical test, higher order mode (HOM) and field emission study of the ESS superconducting medium beta (MB) cavity. The ESS MB cavity is a 6-cell elliptical cavity. The main criteria for a multicell elliptical cavity design are explained. The multicell elliptical cavity fabrication process is discussed. LÄS MER

4. 23. High-Aspect Ratio Nanofabrication for Hard X-Ray Zone Plates

   Författare :Karolis Parfeniukas; Ulrich Vogt; Hans Hertz; Anne Sakdinawat; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nanofabrication; x-ray optics; zone plate; tungsten; silicon; reactive ion etching; metal-assisted chemical etching; Ronchi test; Fysik; Physics;

   Sammanfattning : Hard x-ray nanoimaging enables structural investigations of new materials for many applications. For high-resolution experiments, zone plate x-ray optics are commonly chosen.Two methods of zone plate nanofabrication are presented in this thesis.Zone plates are circular diffraction gratings with radially decreasing grating period. LÄS MER

5. 24. Motion interactive games for children with motor disorders : motivation, physical activity, and motor control

   Författare :Marlene Sandlund; Charlotte Häger; Eva Lindh Waterworth; Lena-Karin Erlandsson; Ann-Christin Eliasson; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Children; parents; cerebral palsy; physical training; home training; motivation; physical activity; motor control; virtual reality; video games.; Physiotherapy; Sjukgymnastik fysioterapi; sjukgymnastik; Physiotherapy;

   Sammanfattning : As motion interactive games have become more widespread the interest in using these games in rehabilitation of children with motor disorders has increased among both clinical professionals and the families of these children. The general aim of this thesis was to evaluate the feasibility of using interactive games in rehabilitation of children to promote motivation for practice, physical activity, and motor control. LÄS MER

7. 25. Metal Particles – Hazard or Risk? Elaboration and Implementation of a Research Strategy from a Surface and Corrosion Perspective

   Författare :Klara Midander; Inger Odnevall Wallinder; Sannakaisa Virtanen; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ferro-chromium alloy; metal particles; bioaccessibility; chemical speciation; dermal contact; surface oxide; in-vitro testing; chemical speciation; cu; copper; comet assay; intracellular; ultrafine; in vitro; A549; cytotoxicity; DNA damage; nanoparticles; particle characterization; artificial sweat; nickel release; nickel powder particles; particle loadings; release kinetics; surface area; copper release; powder particles; synthetic body fluids; simulation of interstitial lung conditions; skin contact; metal release; stainless steel; particles; test method; Surface and colloid chemistry; Yt- och kolloidkemi; Analytical chemistry; Analytisk kemi; Spectroscopy; Spektroskopi;

   Sammanfattning : Do metal particles (including particles of pure metals, alloys, metal oxides and compounds) pose a hazard or risk to human health? In the light of this question, this thesis summarizes results from research conducted on metal particles, and describes the elaboration and implementation of an in vitro test methodology to study metal release from particles through corrosion and dissolution processes in synthetic biological media relevant for human exposure through inhalation/ingestion and dermal contact. Bioaccessible metals are defined as the pool of released metals from particles that potentially could be made available for absorption by humans or other organisms. LÄS MER