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Magnetomotive ultrasound imaging is an emerging technique where superparamagnetic iron oxide nanoparticles can be used as an ultrasound contrast agent. A time-varying external magnetic field acts to move the particles lodged in tissue, and ultrasound is used to detect the resulting tissue movement. In phantom studies we have observed opposite phase motion next to regions containing nanoparticles.
Abstract in UndeterminedThe demands for energy efficent heating solutions for the manufacturing industry can be met by a new induction heating platform, presented in this article. A new concept and technology to design and manufacture induction heating units is explained, evaluated and tested with successful results. The so called Greenheat technology relies on inductors built on Litz wiring mould
Popular Abstract in Swedish Denna avhandling handlar om utveckling och tillämpning av metoder för jonstråleanalys av lätta ämnen (lättare än ungefär aluminium), framförallt vid en nukleär mikrosond. Vid en nukleär mikrosond accelereras tunga partiklar, t.ex. protoner, av en partikelaccelerator och fokuseras av ett speciellt magnetiskt linssystem ned till en storlek av ungefär 1 mikrometer. Denna sThis thesis treats the development of Ion Beam Analysis (IBA) methods, principally for the analysis of light elements at a nuclear microprobe (NMP). The light elements are in this context defined as those with an atomic number Z of less than approximately 13 (aluminium). The work reported is to a large extent based upon multiparameter methods. Several signals are acquired simultaneously, and the d
Popular Abstract in Swedish Kan man förutse risk för suicid med psykiatriska skattningsskalor? Omkring 20.000 suicidförsök registreras varje år i Sverige. Denna siffra borde dock sannolikt vara högre, eftersom bara de individer som kommer i kontakt med sjukvården räknas. Antalet fullbordade suicid har länge ansetts vara cirka 10 % av dessa, d.v.s. cirka 2000 personer per år. Sedan några år har doA decline of suicide rate can be accomplished by different psychiatric interventions. Early identification of individuals at risk for future suicide is especially important. Results from rating scales could add detailed information, which in turn might strengthen a psychiatric suicid risk assessment. This thesis deals with emergency evaluations and psychiatric inpatient evaluations after a suicide
This paper provides a complete circuit for a low-loss non-conventional power MOSFET or IGBT driver. The driver, which provides galvanically separated input and output signals, is fed from a unipolar DC voltage but provides a bipolar gate-source voltage. The driver applies two, already known, techniques and together they form a resonant galvanically separated power MOSFET/IGBT gate driver. The firs
Popular Abstract in Swedish Vår kropp består av en till synes oändlig mängd individuella celler. För att alla dessa celler skall kunna fungera som en helhet måste de meddela sig med varandra. För att en cell i tån ska kunna känna av vad som händer i knät så har den bland annat receptorer på sin yta. Receptorer är proteiner som sitter förankrade i cellens yttre skal, i cellmembranet. Receptorns enaInformation about extracellular proteolytic activity is transduced to the cell by a transmembrane G-protein coupled receptor subfamily. These receptors are activated by proteolytic cleavage in the extracellular amino-terminal domain and are thus termed proteinase-activated receptors (PARs). The second member of this subfamily, PAR-2, is activated by trypsin-like proteinases, however the physiologi
Highly compacted bentonite has been proposed as the buffer material in the Swedish concept for the disposal of nuclear waste. To increase the knowledge of the hydro-mechanical behaviour of unsaturated swelling bentonite a series of laboratory experiments was carried out. The main purpose was to conceptually model the hydro-mechanical behaviour of the bentonite. The influence of testing techniques
Popular Abstract in Swedish Atomer är de grundläggande byggstenarna för alla material runt omkring oss. Varje enskild atom består av ett tätt packat område i centrum, som kallas atomkärnan, omgivet av ett moln av elektroner. Atomkärnan innehåller neutroner och protoner, hopbundna av den starka kärnkraften. Vissa kombinationer av neutroner och protoner leder till bildandet av kärnor som är stabilaA series of experiments and developments, related to stable and radioactive isotopes, have been carried out. These studies have focused on measuring the low-lying excitations of spherical and deformed nuclei using electromagnetic (Coulomb) excitation and also on developments in detector technology for upcoming radioactive ion beams facilities. The low-lying excitations in the nuclei 107,109Sn and
