Materials Literature
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Abstract Summary: Poly[2‐(N,N‐dimethylamino)ethyl methacrylate] (PDMAEMA), copolymers of different compositions of styrene with 2‐(N,N‐dimethylamino)ethyl methacrylate (SDMAEMA) or methacrylic acid (SMA) were synthesized by free radical polymerization and characterized by several techniques. Different ternary mixtures…
Power quality has become an important factor in power systems, for consumer and household appliances with proliferation of various electric/ electronic equipment and computer systems. The main causes of a poor power quality are harmonic currents, poor power factor, supply voltage variations, etc. In recent years the d…
The present paper is prepared for the peaceful use of nuclear energy. Proliferation resistance of plutonium can be enhanced by increasing the decay heat of plutonium. For example, it can be enhanced by increasing the isotopic fraction of 238Pu, which has the largest decay heat among plutonium isotopes. In the present…
Abstract A material property that is of crucial importance for many industrial applications is the effective thermal conductivity. This property is a function of the thermal conductivities of components, their geometry, the spatial distribution of the components (including volume fraction and shape), the thermal resis…
In this study, the tribological, thermal, and kinetic attributes of 300-mm copper chemical mechanical planarization were characterized for two different pads. The coefficient of friction (COF) ranged from 0.39 to 0.59 for the D100 pad, indicating that boundary lubrication was the dominant tribological mechanism. In co…
The purpose of this paper is to study reliability evaluation of fine pitch micro bump. In this work, hot temperature storage(HTS) test and electromigration(EM) test were performed for reliability evaluation. We compared microstructure of 20um diameter fine pitch micro bump at 150°C and 180°C. Also, Ni3Sn4IMC growth ra…
In this study, we present design and manufacturing technology for the Salisbury screen type radar absorbing structure (RAS) in X-band. The RAS is composed of a dielectric lossy sheet and an E-glass fabric/epoxy composite laminate as the spacer. This RAS has a broader absorbing bandwidth and much thinner spacer than th…
The effect of concanavalin A on the structure of polymer hydrogels prepared via the free-radical copolymerization of acrylamide, N -(2-D-glucos)acrylamide, and N , N ′-methylene-bis(acrylamide) is studied. When complexed with N -(2-D-glucos)acrylamide, concanavalin A is involved in copolymerization as a macromolecular…
LED is generally driven by constant current because the color and brightness of LED are directly related to their forward current. The current accuracy is a very important index for a high performance LED driver. In this paper, a constant current source applied in LED driver is proposed to improve the accuracy of the…
In this paper, a dynamic model for PMSM with inter-turn fault is presented. FEM analysis is used for study the PMSM with inter-turn fault. Two methods for analytical calculation of parameters are presented. The first method widely used in literature computes the faulty inductances by applying a simple percentage on th…
The performance of a permanent magnet synchronous motor (PMSM) drive highly depends on the machine parameters such as resistance, inductance and back-emf constant. The accurate knowledge of these parameters is of specific interest in the case of direct torque control method (feed forward control) and sensor-less contr…
Tremendous developments in the field of biomedical imaging in the past two decades have resulted in the transformation of anatomical imaging to molecular-specific imaging. The main approaches towards imaging at a molecular level are the development of high resolution imaging modalities with high penetration depths and…
Abstract In this study, the removal of zinc(II) ion from an aqueous solution by pistachio shells (PS) is investigated. The dynamic behavior of the adsorption is examined on the effects of pH, adsorbent dosage, and contact time. The adsorption rates are determined quantitatively and simulated by the Lagergren first ord…
Magnetic properties of mechanical alloyed α-Fe1.4Ti0.6O3 were studied at broad scale of temperatures, starting from room temperature down to 5 K. Morin transition of the base compound α-Fe2O3 was not observed after Ti doping. Enhanced ferromagnetism and exchange bias effect were exhibited in the alloyed compound α-Fe1…
The potential of positively charged polymeric nanoparticles in improving therapeutic efficacy of meloxicam (MLX), a poorly water-soluble anti-inflammatory agent was evaluated. MLX loaded positively charged nanoparticles were prepared by using poly-epsilon-caprolactone (PCL) as a biodegradable polymer and didodecyldime…
Switched flux permanent magnet (SFPM) machines have the synergy of PM machines, including high torque density and high efficiency, and switched reluctance (SR) machines, such as simple and robust rotor structure. Therefore, they are potentially attractive for many applications, ranging from traction to aerospace. Comp…
Segmental Rotor Switched Reluctance Machines have been demonstrated to produce significantly more torque than Conventional Switched Reluctance Machines because each coil is able to link more magnetic flux. In previous work the range of topologies studied has been relatively restricted; there has been no consideration…
In this paper, a current control scheme is presented for high speed SRM (Switched Reluctance Motor) with an advanced 4-level converter. The presented 4-level converter for the high speed SRM has four current control modes which produces different 2 voltage levels during the sampling time. According to the current cont…
The technological properties and the electromagnetic shielding efficiency of clay based ceramic building products prepared by using electric arc furnace slag (EAFS) and ladle furnace slag (LFS) as admixtures and fired at various temperatures were investigated. Chemical and mineralogical analyses were performed to char…
Abstract Five energetic compounds, 3,3‐bis(tetrazol‐5‐yl)‐4,4‐azofurazan (DTZAF), 3‐nitro‐4‐(tetrazol‐5‐yl)furazan (NTZF), hydrazinium 3‐amino‐4‐(tetrazol‐5‐yl)furazan (HATZF), triaminoguanidinium 3‐amino‐4‐(tetrazol‐ 5‐yl)furazan (TAGATZF) and guanylureaium 3‐amino‐4‐(tetrazol‐5‐yl)furazan (MATZF), were prepared usin…