Materials Literature
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Internet electronic products have requirements different from those of personal computers (PCs). The increasing importance of Internet electronics is driving changes in development of IC technology. One important characteristic of the Internet Age is computational disaggregation. Whereas, over the past 20 years, PCs h…
Surface hydrophobicity is one of the factors that contribute to the superior performance of polymer insulators when compared to porcelain. However, corona discharges that can be generated locally due to high electric field can destroy hydrophobicity and also contribute to the degradation of the insulator. This paper p…
After many years of development, liquid crystalline polymer materials are finally ready for significant use as a printed circuit board material. These materials have a ways had very attractive electrical and physical properties but were a challenge to be made into industry acceptable circuit boards. Through extensive…
This paper proposed a technique for estimating the parameters of three-phase induction motor in order to conduct on-site energy audits of existing motors, which are then used to project a cost savings. This proposed technique uses only a few sets of data (voltage, current, speed, power factor or torque if possible) fr…
The subwavelength imaging quality of a metamaterial superlens is studied numerically in the wavevector domain. Examples of image compression and magnification are given and resolution limits are discussed. A minimal resolution of /spl lambda//6 is obtained using a 36 nm silver film at 364 nm wavelength. The simulation…
The aging of colloidal gels is investigated using very long duration Brownian dynamics simulations. The Asakura-Oosawa description of the depletion interaction is used to model a simple colloid polymer mixture. Several regimes are identified during gel formation. The intermediate scattering function displays a double…
A new 2D modeling method for E-core transformers adds an extended flux return path to the model of the section perpendicular to the core. Averaged with a section parallel to the core modified to have the same reluctance as the 3D model, the finite-element simulation results for total magnetic energy and magnetic energ…
The knowledge of partial discharge (PD) as a physical phenomenon has made considerable progress in the last decade(s). These efforts have led to a validated statistical-mathematical model able to simulate the PD behavior in dielectric bounded spheroidal cavities. Recent studies demonstrated that an approach based on s…
Double-layer electrochemical capacitors (EC), also known as ultra-capacitors or super-capacitors, are an emerging storage technology already being used for applications such as DC motor drives, UPS systems, and electric vehicles. The latest EC store enough energy to rival a lead-acid battery and can outperform batteri…
Abstract The preparation and properties of fourteen novel paramagnetic [Ni II x ] aggregates bridged by pivalate, pyrazolinolate and in most cases hydroxide are reported. A rich structural diversity has been achieved by changing the nature of the alkali of the base used during the synthesis, leading to the nuclearitie…
Conventional core loss estimation methods exhibit limitations in dealing with important aspects of switching power converter applications such as different duty cycles, discontinuous-conduction-mode, variable switching frequency, or variable duty cycle operation. These limitations are particularly evident when trying…
We describe how a large number of products are scheduled to run in parallel on a pool of wire-bond machines to meet weekly demand. We seek to maximize demand fulfillment subject to system constraints. The schedule is generated by a simulation engine and used to control the machines at execution time and also to plan f…
Halocarbons undergo catalytic destruction and mineralization with silver and gold nanoparticles in solution forming metal halides and amorphous carbon. The reaction, studied for several halocarbons and one chlorofluorocarbon, is efficient and complete destruction occurs within several hours at room temperature. The me…
Gradient elastic flexural beams are dynamically analysed by analytic means. The governing equation of flexural beam motion is obtained by combining the Bernoulli-Euler beam theory and the simple gradient elasticity theory due to Aifantis. All possible boundary conditions (classical and non-classical or gradient type)…
Two three-dimensional (3D) malonate bridged networks, [Cu(mal)(DMF)](n) (1) and [[Cu(mal)(0.5pyz)].H(2)O](n) (2), have been synthesized in H(2)O-DMF solution. Compound 1 exhibits ferromagnetic ordering below 2.6 K (T(c)), and 2 displays a metamagnetic behavior below 3.2 K (T(N)).
Compounds [Fe(tzpy)(3)](BF(4))(2) (1), [Fe(tzpy)(2)(NCS)(2)].S (S = 2CHCl(3) (2), H(2)O (3)), and [Fe(tzpy)(2)(NCSe)(2)] (4) (tzpy is 3-(2-pyridyl)[1,2,3]triazolo[1,5-a]pyridine) have been synthesized and characterized. 1 crystallizes in the monoclinic noncentrosymmetric system, Cc space group, Z = 4, with a = 11.4680…
Ultralong alkanes (C n H 2 n +2, n > 150) are generally considered as the most appropriate model for polyethylene, PE, and studies of these compounds can shed light on fine structural features of polymer crystals and the mechanisms of polymer crystallization. High-temperature atomic force microscopy was applied for co…
Fuel cells are a versatile, renewable energy source that can be used in a wide range of applications. In this paper, topologies for a 10 kW inverter system with a low voltage fuel cell input are evaluated based on simplicity, performance, and cost. This particular fuel cell system is intended for household stand-alone…
This paper reports a dramatic reduction of liquid droplet flow resistance by engineering the surfaces into nanomechanical hydrophobic structures that show a contact angle over 175/spl deg/. Flow resistances of droplets on open surfaces as well as in confined microchannels (between surfaces) have been measured with sig…
Starting with the mathematical modeling of classical problems of hysteretic phenomena, the author provides an insight into the physics of the inverse hysteresis, higher order reversal loops, accommodation, viscosity, creep, wasp-waisted loops and hysteretic coupled systems. Adopting a novel approach, he presents the T…