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Advanced microscopy techniques can permit imaging beneath the tissue surface in hollow organs where cancer can begin. This work examines the design, modeling, fabrication and control process for an electromagnetic z-displacement, or into-tissue, scanning microactuator based on semiconductor fabrication methods. Dynamic modeling and control of the microactuator allows it to perform large vertical displacements...
Since its first observation almost three decades ago high-order harmonic generation (HHG) in gases became a reliable source of extreme ultraviolet (XUV) pulses, which gave the possibility to study electronic processes on their natural timescale [1, 2]. While the main building blocks of the experimental setups for gas HHG are the same in almost all cases, the focusing or medium geometry varies from...
Nonlinear photoionization with energetic FEL pulses has opened up new horizons for the investigation of inner-shell electron dynamics in atomic and molecular systems [1]. So far, however, the limited temporal resolution (typically a few tens of femtoseconds) achievable with FELs has hampered the time resolution of these dynamics.
Bias stress study is presented in Metal-Insulator-Semiconductor structure using Indium-Gallium-Zinc oxide film on top of HfO2, deposited by pulsed laser deposition and atomic layer deposition, respectively. The produced effect on this interface is analyzed through hysteresis measurements at different bias conditions for several periods of time.
This paper presents the application of a mathematical algorithm based on the gradient method [1] to solve optimal power flows (OPF) in electrical microgrids with photovoltaic generation in order to improve the voltages profiles and consequently reduce the active power losses. The generation and storages devices were modeling by dynamic curves and the algorithm was implemented in a two electrical microgrids...
First of all, a state of the art regarding the methods to solve optimal power flow (OPF) and its application in electrical microgrids are presented in this article. Afterward, a mathematical algorithm based on the gradient method is proposed to implement OPF to a low-power electrical microgrid, with the objective of improving the voltage's characteristics and reducing the active power losses. Finally,...
The development of one part of the autonomous robot specialized in the snow removal task is presented in this paper. With a small size and light weight this robot will be a helpful partner in winter season. This study is focused in the dragging mechanism of the snow eater robot. The dragging mechanism had three screws, two transversal screws for the incoming snow and one longitudinal screw for the...
This paper describes an analysis method for achieving control torque and speed with vector control for induction motors. An indirect field-oriented output feedback motor controller is presented; it is suitable for low-cost applications. A current model control is used to sense back electromotive force (back-EMF) by means of an analog to digital converter (ADC); its simulation and filtering are discussed...
Traditional ad hoc network routing formulations abstract the lower level phenomena. While this simplifies the routing formulations, it is well known that jointly optimized systems routinely outperform their singularly optimized brethren. In this paper we improve upon traditional ad-hoc routing by defining the cross layer joint optimization of an ad-hoc wireless network in the context of a 3GPP long...
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