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In this work we present efficient solutions of Surface Integral Equations to solve electromagnetic problems in nanophotonics. These efficient solutions are based on arranging equations to be valid for plasmonic and other exotic materials. Solutions to these problems provide efficient solutions to new leading-edge applications, including analysis of new materials, cloaking, nanoscale wireless links...
The efficiency of the avalanche process in Avalanche photodiodes depends on the Ionization coefficients. Ionization coefficients are dependent on the band-structure of materials. Ionization coefficients at different temperatures and fields are predicted by an analytical formula proposed by Okuto and Crowell. In this work, we propose two different mean free paths in two different field regions. These...
Pedagogically, feedback in CAPT systems can be improved by focusing on the most critical errors rather than presenting all errors to the users at the same time. This paper presents our work on the use of crowdsourcing for collection of gradations of word-level mispronunciations in non-native English speech. Quality control procedures based on the proposed WorkerRank algorithm (adapted from well-known...
One of the key issues for speech prosody is control of pause occurrence and duration. Occurrence of pause is unconditional at sentence boundaries with high probability at major syntactic boundaries such as clause boundaries and more or less arbitrarily at minor syntactic boundaries for text-readout speech. In this paper a detailed investigation is conducted for sentence-medial pauses for readout speech...
In order to obtain high logistical performance in a production network at low logistical costs, there has to be a high level of synchronization in the material provision of the final assembly. The level of synchronization can be restrained by dynamic effects in a network. This paper presents an approach for identifying critical material procurement processes that are accountable for an insufficient...
Proton Exchange Membrane Fuel Cells (PEMFC) are the most appropriate energy source for small robot applications. PEMFC is superior in power density and thermodynamic efficiency as compared with the Direct Methanol Fuel Cell (DMFC). Furthermore, PEMFC is lighter weight and smaller in size than DMFC, which are very important factors for small robot power systems. Operating conditions and fabricating...
The idea of using intelligent products to ensure an information continuum all along the product life cycle (PLC) is more and more shared today. However, it is not that easy to identify what information should be stored on the product. To answer this question, we propose a data dissemination process to select context-sensitive information from the database, that must be stored/replicated on the product...
This paper describes a new method and a set of equations for calculating the force-deflection characteristics of the catenary anchor leg. The traditional catenary equations reference horizontal deflection of the catenary top to the catenary generation point which is used to mathematically ?generate” the catenary curve shape. The catenary generation point is not stationary; its horizontal and vertical...
Safeguards and security systems for nuclear facilities include material control and accounting (MC&A) and a physical protection system (PPS) to protect against theft, sabotage and other malevolent human acts. The insider threat is most often addressed as part of the evaluation of a facility's PPS. A PPS is evaluated using probabilistic analysis of adversary paths on the basis of detection, delay,...
This paper describes our continued work in creating a set of narrated dynamically worked-out problems and the team based in-class problem solving for the Electric Circuits students to improve their problem-solving skills by understanding the key concepts and the way that they should be utilized in solving circuits' problems. The dynamically worked out problems, consists of problem solution annotated...
A simulation of open source code is presented for elastodynamic wave propagation of wide-band pulses from arbitrary transducers configuration in viscoelastic media. The code utilizes the well known Elastodynamic Finite Integration Technique with an added dissipative term. It manages a programming interface with MATLAB and a GPGPU acceleration code for openCL capable devices. This paper presents a...
Accurate simulation of SAW devices requires accurate material tensor data. However, literature values are in most cases measured on certain engineered test devices and do often not reflect real world production processes with the necessary accuracy. In this work, a parameter identification method is outlined, which can be used to estimate material parameters from admittance measurements of resonators...
We present a methodology to characterize BAW resonators both linearly and nonlinearly. The procedure uses physical modeling along with measurements that exploit different manifestations of the nonlinear phenomena to identify the dominant linear and nonlinear material properties. Such methodology allows obtaining consistent nonlinear material parameters by use of two independents measurements.
We discuss various verification and validation issues in computational modeling of a series of aluminum “thick-wire,” i.e., rod, experiments that have been conducted on the University of Nevada, Reno (UNR) Zebra generator (2 TW, 1 MA, 100 ns). These conceptually simple experiments involve multi-megagauss surface magnetic fields and have proven to be exceptionally rich in physical phenomena. The experiments...
In this work, we present a new two-dimensional mathematical modeling in a cylindrical coordinate system which computes the time evolution of trapped charges in Al2O3/SiO2 material due to irradiation by primary electrons. A reaction-diffusion equation expressing the spatial distribution of free charges fluxes in the material is given. The contribution of the electric field induced by the charge distribution...
A vacuum arc voltage of rising up like a step establishes transient oscillating currents in a closed circuit with a parallel capacitor and an inductance. From previous investigation, we found that a current zero was realized by the transient oscillating current caused by the transient phenomena or the instability phenomena. This paper presents detailed investigation results of the transient phenomena...
The bandwidth of the S-polarization and the P-polarization modes will separate while the narrowband thin-film filter is in oblique incidence, which will cause serious polarization dependent loss and limit its tunable range. The phenomenon of the polarization bandwidth separation and its relationship to the mirror layers of the thin-film filter are analyzed. One novel method about eliminating the polarization...
Wear of cutting tool in the most of cases occurs on the tool flank and causes increasing of cutting force which results aggravation quality of processed surface and accuracy, destruction of tool. Knowledge of distribution of contact load on the wear chamfer of tool flank is used for analysis of stressed state, calculation of strength and rational use of cutting tools. Experimental and theoretical...
A new model based on space charge dynamics under very high dc electric field has been proposed to explain thickness dependent dielectric breakdown. Space charge phenomenon under high electric field has been studied for several decades thanks to the development of new charge mapping techniques. Overwhelming evidences show that the charge packet can be formed in the material under high electric field...
The flash method for measuring thermophysical properties (TPP) has attracted wide-spread interest since it was introduced by Parker et al (1961). In an extension of this technique, we introduced a front-face flash-monitoring method (FFFMM) in which a radiative source delivering short heat pulses and an infrared detector to measure temperature excursion with time are positioned on the same side of...
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