Materials Literature
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3 Abstract: In this study, based on topographic maps, satellite images and conducted several field visits, ten pedons studied in the area and for further study four representative pedons selected which occurring on two different landscapes (piedmont plain and hill). Occurrence of gypsum in studied soils related to wea…
poly(vinyl alcohol); hydrotalcite; nanofibres; electrospinning; composite. (*) To whom correspondence to be addressed.
In this paper we first prove a theorem on the nonexistence of pyramidal polynomial basis functions. Then we present a new symmetric composite pyramidal finite element which yields a better convergence than the nonsymmetric one. It has fourteen degrees of freedom and its basis functions are incomplete piecewise triquad…
The VITROX ® isocyanate-based resin system is a novel development that provides a unique combination of high thermal stability and toughness in a resin system that is easy to process and to cure. The mixed resin system exhibits a low viscosity, which at the end of a tunable induction period of up to several hours at r…
Melting and non-isothermal crystallization behaviors, oxidative induction time, and fire performance of the injectionmolded wood flour-high density polyethylene (HDPE) composites (WPCs) incorporated with different levels (4, 8, or 12 wt %) of boron compounds [borax/boric acid (BX/BA) (0.5:0.5 wt %), zinc borate (ZB)]…
Generation of the corona discharge between a sharp electrode and a grounded heated surface usually induces an ionic wind, whose momentum can be used for enhancement of heat transfer. The previous studies are mainly d evoted to exploitation of the normal veloci- ty component, resulting from the direct ionic wind moment…
Inflat electronstoragerings, onlytheverticalcomponent of the beam polarization is preserved. During acceleration, the crossing of several depolarizing resonances may cause severe beam depolarization. Even in case of fast ramping speeds of upto 4 GeV/s, first ordereffects like imperfection and intrinsic resonances have…
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…