نتایج جستجو برای: micro beams
تعداد نتایج: 147416 فیلتر نتایج به سال:
This paper presents the modeling and simulation of new structure for solid-state three degrees of freedom (3-DOF) micro accelerometer utilizing piezoresistive effect in single crystal Si. The proposed sensor can detect three components of linear acceleration simultaneously. The sensing structure consists of combined cross-beam and surrounding beams and seismic mass. Therefore, this novel propos...
We measured the timing resolution of TOF counters by means of Cherenkov-light detection with a Micro-Channel Plate PhotoMultiplier Tube, and attained sTOF 1⁄4 6:2 ps using 3GeV=c pion-beams with a readout electronics of 4.1 ps resolution. The optimum radiator thickness was examined and the detectable number of photo-electrons was analyzed. r 2006 Elsevier B.V. All rights reserved. PACS: 85.60.H...
This paper presents the design and simulation of an improved electro-thermal micromachined pump for drug delivery applications. Thermal actuators, which are a type of Micro Electro Mechanical system (MEMS) device, are highly useful because of their ability to deliver with great force and displacement. Thus, our structure is based on a thermal actuator that exploits the Joule heating effect and ...
An analytical model to predict the linear viscoelastic behavior of thin-walled laminated fiber-reinforced plastic (FRP) composite beams is presented. Using the correspondence principle, this new model integrates micro/macro-mechanics of composites and mechanics of thin-walled laminated beams to perform beam. analyses in the Laplace or Carson domains. The analytical expressions for beam relaxati...
s It has been demonstrated that micromachined sensors and actuators offer unique capabilities for adaptively controlling fluid flow through small-scale actuation [1, 2]. Magnetic micro actuators based on Permalloy material (Ni8oFe2O) have been demonstrated. A piece of electroplated Permalloy is electroplated on top of the structural plate supported by cantilever beams made from Low Pressure Che...
Abstract To study the effects of macro- and micro-fiber on concrete beams, bending resistance tests were conducted polypropylene fiber-reinforced beams. Stepwise loaded carried out to obtain load–deflection curves for different test pieces, cracking load values first inclined crack, recording depicting crack development, changes in mid-span deflection load–strain relationships concrete, etc. Th...
Suitable instrumentation for laser-accelerated proton (ion) beams is critical for development of integrated, laser-driven ion accelerator systems. Instrumentation aimed at beam diagnostics and control must be applied to the driving laser pulse, the laser-plasma that forms at the target and the emergent proton (ion) bunch in a correlated way to develop these novel accelerators. This report is a ...
Since the first detection of the neutrino at reactors [1] and the discovery of the νμ at the Brookhaven AGS [2], accelerators and reactors have been used to provide intense beams of neutrinos. Over the last 30 years, experiments with neutrino beams have played a major role in shaping the Standard Model of particle physics as it is known today. At present, electroweak theory is more conveniently...
The correlated motions of two micron-sized particles reflect the (micro-) rheological properties of a fluid and can be conveniently detected using two optical traps in combination with interferometric displacement detection. When the correlations become small, cross-talk between the two beams becomes important. We have used dual optical traps created by either two orthogonally polarized laser b...
This paper investigates the distribution of principal strain by micro mechanical measurement of concrete axial strain in Reinforced Cement Concrete (RCC) moderate deep beams across its width and depths for various span-to-depth ratios. A complete shear deformational behavior along with load-deflection response, crack patterns and modes of failure were studied experimentally. Twelve beams were t...
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