Materials Literature
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CAMELIA CERBU1*, IOAN CURTU1, DAN MIHAI CONSTANTINESCU2, MATEI CONSTANTIN MIRON2 1„Transilvania” University of Braoov, Faculty of Mechanical Engineering, Department of Automotives and Mechanical Engineering, 29 Eroilor Av., 500036, Braoov, Romania, 2 Politechnic University of Bucharest, Faculty of Engineering and Tech…
This paper reports the results of the miniaturization design of a permanent-magnet synchronous motor, for which an optimal design technique based on thermomagnetic field coupling analysis is used. We derived the optimal solutions for various motor flatness ratios and determined the relationship between the motor size…
Calotropis procera Linn. showed remarkable hepatoprotective activity against paracetamol-induced hepatotoxicity as judged from biochemical parameters such as serum aspartate amino transferase (AST), alanine amino transferase (ALT), alkaline phosphatase (ALP), total bilirubin, total protein and gamma glutamate transpep…
Metamaterial covers exhibit inimitable electromagnetic properties which make them popular in antenna engineering. A traditional metamaterial cover has an identical transmission phase for a normally incident plane wave regardless of its polarization state. The purpose of this research is to show the possibility of usin…
Conductive Pt-added LaNiO3 (PLNO) electrode films were prepared on Si substrates using radio frequency magnetron sputtering. The PLNO films demonstrate a reduced resistivity as compared with LaNiO3, which is consistent with X-ray photoelectron spectroscopy analysis. Preferred (001)-orientated texture is observed for t…
Si nanocrystals in silica are attractive for photonic applications. Various optical functions can be realized in this way (for example, light emission). The optical and structural properties of a variety of such materials are described and compared here. It is found that Si nanocrystals with diameters 3-4 nm are not a…
The temperature dependence of the radial breathing modes (RBMs) and the zone-center tangential optical phonons (G-bands) of double-walled carbon nanotubes (DWCNTs) has been investigated between 300 and 700 K using Raman scattering. As expected, with increasing temperature, the frequencies of the Raman peaks, including…
Solid propellants are treated as composites with high volume fraction of particles embedded in the polymeric binder. A micromechanics model is developed to establish the link between the microscopic behavior of particle/binder interfaces and the macroscopic constitutive information. This model is then used to determin…
Celiac artery aneurysms (CAA) are one of the rarest forms of visceral artery aneurysms. Most patients are a symptomatic at the time of diagnosis and aneurysms are detected incidentally during diagnostic imaging for other diseases. We present the case of a 42-year-old man who had an asymptomatic giant CAA detected inci…
Abstract In this paper, an elastic shell model is presented for postbuckling prediction of a long thin-walled cylindrical shell under axial compression. The Ritz method is applied to solve the governing equilibrium equation of a cylindrical shell model based on the von-Karman type nonlinear differential equations. The…
Determining as accurate as possible spent nuclear fuel isotopic content is gaining importance due to its safety and economic implications. Since nowadays higher burn ups are achievable through increasing initial enrichments, more efficient burn up strategies within the reactor cores and the extension of the irradiatio…
The aim of the present work was to develop new composite materials based on two biocompatible polymers (sodium alginate and polycaprolactone) intended for use in the treatment of bone tissue defects. Tests carried out to obtain polymer-fibre composites using two resorbable polymers demonstrated the possibility of atta…
Abstract—We investigate numerically the collision of nonlinear envelope pulses in composite right- and left-handed transmission lines with regularly spaced Schottky varactors. Because of the nonlinearity caused by the Schottky varactors, the dispersive distortion of envelope pulses is well compensated. We find that wh…
We report a molecular modeling study to evaluate and select conducting polymers (CPs) as the sensing materials of carbon dioxide (CO2) sensor. The interaction between polymer and gas and the adsorption of the gas molecules in the polymer matrix are investigated. Polymers considered for this work include emeraldine bas…
Triosephosphate isomerase (TPI), a glycolytic enzyme, functions in catalyzing the interconversion of glyceraldehyde-3-phosphate and dihydroxyacetone phosphate and is generally upregulated in tumours. However, there are data suggesting loss in lymphomas. To determine its effects in chicken embryonal fibroblasts (CEF) a…
Curvilineary tetrahedral diamond arrays of nano-tip with different pitches are firstly fabricated and the suppressed screening effects are also investigated. The curvilinear tetrahedral diamond arrays are fabricated by hot-filament chemical vapor deposition (HFCVD) on anodic aluminum oxide (AAO) template. The AAO temp…
The primary purpose of the highway-railway at-grade crossing is to provide a smooth surface for the safe passage of rubber-tired vehicles across the railroad. The crossing support and surface in the jointly used area represent a significantly expensive unit cost of the highway and railway line. The ideal highway cross…
High efficiency solar cells require high generation and low recombination rates. High bulk lifetime, well passivated surfaces, and lowly doped thin emitters allow for low recombination rates. Thin passivated emitters should be contacted locally in order to avoid excessive contact recombination. This is common practice…
Simulating fragment penetration into steel involves complicated modeling of severe behavior of the materials through multiple phases of response. Penetration of a fragment-like projectile was simulated using finite element (FE) and meshfree particle formulations. Extreme deformation and failure of the material during…
A new strategy was proposed to monitor transition behavior involved in F−- and H+-triggered reversible supramolecular self-assembly/disassembly by using a Ru2+ complex (Ru(Phen)32+) as a fluorescent probe. N,N-Dibenzoyl-L-cystine (DBC) was used as gelator to form supramolecular gels. Fluorescent images of the fluoresc…