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Characterization of progressive damage in concrete using impact non-linear reverberation spectroscopy

Nonlinear acoustic methods have shown potential for the identification of early damage in brittle materials such as concrete. Commonly, these methods evaluate relative nonlinearity parameters from multiple resonance tests at different amplitudes. We demonstrate a recently developed alternative method, Impact Nonlinear Reverberation Spectroscopy (INRS), where quantitative nonlinearity parameters ar

Design, optimization and construction of an electric motor for an Electric Rear Wheel Drive Unit application for a Hybrid Passenger Car

An Electric Rear Wheel Drive -ERWD- unit is a cost effective solution for the electrification of passenger cars. While the conventional front-wheel transmission is kept, the ERWD unit provides electrical torque to the rear wheels and regenerative braking capabilities. In this article the design, optimization, construction and testing of an electric motor for such unit is presented. The experimenta

System and Method for Controlling Motion of Spacecrafts

A motion of an object is controlled from a geostationary transit orbit (GTO) of an earth to an orbit of a moon. A first trajectory of the motion of the object is determined from an intermediate orbit of an earth to a neighborhood of a stable manifold of a first Lagrange point (L1). A second trajectory of the motion of the object is determined from the GTO to the intermediate orbit. A third traject

Novel Processing and Electrical Characterization of Nanowires

Popular Abstract in Swedish Nanoteknik och nanotrådar omnämns ofta media idag, men vad är egentligen en nanotråd, och vad kan den användas till? Dagens datorer, lysdioder och solceller är till stor del beroende av halvledare. En halvledare är ett kristallint material där man enkelt kan ändra ledningsförmågan. Man kan dels bestämma ledningsförmågan när materialet tillverkas genom att tillföra ytterThis thesis investigates novel electrical nanowire characterization tools and devices. Conventional characterization methods, long available to bulk semiconductor samples, have been adapted and transferred to the nanowire geometry. The first part of the thesis describes the development of Hall effect measurements, an entirely new characterization tool for nanowires. It is shown that Hall effect me

Qualitative research on anomalous experience: Between Borges and a hard place…

Abstract in UndeterminedWith the help of the Argentine writer Borges, I will illustrate the absurdity of assuming that science may either grasp reality fully or convey it through abstractions. My departing point is that every methodological perspective has something to contribute to our attempts to elucidate anomalous experiences, and that the extremes of “realness” or abstraction lead to fallacie