Materials Literature
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Abstract This article deals with the design of an outer rotor Permanent Magnet Synchronous Machines (PMSM) driven by wind turbines. The Voltage Total Harmonic Distortion (VTHD) is especially addressed, under design parameters’ handling, i.e., the geometry of the stator, the polar arc percentage, the air gap, the skew…
Abstract Four bromine-substituted 2,5-di(1,3-dithiol-2-ylidene)-1,3-dithiolane-4-thione derivatives, 1a, 1b, 1c, and 1d, were synthesized, and their physical properties were investigated. These compounds were obtained from the reaction of a corresponding zinc complex of 2-(1,3-dithiol-2-ylidene)-1,3-dithiole-4,5-bis(t…
Purpose – The paper aims to illustrate the application of a state-of-the-art fatigue prediction concept (IIW recommendations) to the ADR calculation requirements, in order to include failure-critical weld details to the strength assessment of road tanks. The level of calculation accuracy and, therefore, safety of such…
The ionizing radiation environment on the moon that contributes to the radiation hazard for astronauts consists of galactic cosmic rays, solar energetic particles and albedo particles from the lunar surface. We will present calculations of the absorbed dose and the dose equivalent to various organs in this environment…
This paper describes an H∞ control method for controlling hysteresis in a piezoelectric stack actuator. The actuator used is a high-performance monolithic multilayer piezoelectric stack actuator. The proposed control method involves the use of a capacitor in series with the piezoelectric actuator to provide a measured…
We have performed first-principles calculations of the structural, electronic, mechanical, and vibrational properties of HfO2 based on the density functional theory with Local Density Approximation (LDA), Generalized Gradient Approximation(GGA), the LDA + U and GGA+U approaches based on the density functional theory (…
In this article, the effect of longitudinal magnetic field on wave propagation of an embedded double-walled carbon nanotube with conveying fluid is studied using either the Euler–Bernoulli beam or the Timoshenko beam models. Conveying fluid is magnetite (Fe 3 O 4 ) nanofluid, which is a ferrofluid. Ferrofluids are eff…
Advances in nanotechnology have resulted in the introduction of new materials for therapeutic and diagnostic purposes. In particular, DNA and RNA are viewed as representative and generic nano-blocks because of their physiochemical characteristics of specificity and nanoscopic-level accuracy. In addition, the intrinsic…
The synthesis and electrochemical oxidative coupling of a highly electron-deficient analogue of aniline results in the formation of soluble electron-deficient oligomers. Oligomers undergo related oxidation and reduction processes that are separated by a wide potential range. The mechanism behind this behavior is exami…
Tantalum pentoxide film has a huge application potential in microelectronic field owing to its good chemical stability and thermal stability, and its good compatibility with semiconductor integrated circuit. In addition, Tantalum pentoxide film also has a high dielectric constant, a high refractive index, low absorpti…
We consider a random generalization of the classical Fibonacci substitution. The substitution we consider is defined as the rule mapping, a → baa and b → ab, with probability , and → ba, with probability 1 – p for 0 < p < 1, and where the random rule is applied each time it acts on a . We show that the topological ent…
Effects of methyl methacrylate on the properties of chitosan-filled polypropylene (PP) composites has been investigated. Mechanical and thermal properties of the composites were analyzed according to ASTM D 638-91, thermogravimetry analysis (TGA) and differential scanning calorimetry (DSC). The results showed that ten…
The capacity of charge storage for supercapacitor depends on the size of the electrode surface area and the active material on the electrodes. In this article, we fabricate the three-dimensional microelectrodes with SU-8 photoresist based on the microelectromechanical system technology to increase the electrode surfac…
21 1.3 Permeability Change Upon Orientation of PEBAX Copolymers 22 CHAPTER 2 2.1 Oxygen Permeance (GPU) of PEBA/PP+CaCO 3 Membranes 67 2.2 CO 2 /O 2 Selectivity of PEBA/PP+CaCO 3 Membranes 68 2.3 Oxygen Permeance (GPU) of PEBA/-PP Membranes 69 2.4 CO 2 /O 2 Selectivity of PEBA/-PP Membranes 70 CHAPTER 3 3.1 Fixity R…
Objectives: Evaluate, by using distortion product oto‐acoustic emissions (DPOAE) test, the effect of ginkgo biloba extract (EGB761), which has shown antioxidant properties as a possible otoprotector against cisplatin induced hearing loss. Ototoxicity is an alteration caused by drugs that compromises the auditory and v…
The microstructure and flexural strength of long silicon nitride pipes joined by a local heat-joining technique at different mechanical pressures, temperatures, and holding times were examined. Silicon nitride pipes sintered with Y2O3 and Al2O3 additives were used as the parent material, and a powder slurry of a Si3N4…
Complexation of the very unstable free heptafulvene with iron carbonyls is known experimentally to lead to stable complexes, including two isomers of (η 4 -C 7 H 6 CH 2 )Fe(CO) 3 as well as the binuclear (C 7 H 6 CH 2 ) 2 Fe 2 (CO) 6 . Density functional theory shows that structures of the mononuclear (C 7 H 6 CH 2 )F…
Protein aggregation is an important field of investigation because it is closely related to the problem of neurodegenerative diseases, to the development of biomaterials, and to the growth of cellular structures such as cyto-skeleton. Self-aggregation of protein amyloids, for example, is a complicated process involvin…
Abstract The quantum dots of antimony trisulphide, a potential semiconductor for various applications, are grown in glass matrix for the first time and are characterized by various techniques. The dependence of the average dot size on growth parameters like growth temperature and time is systematically studied for the…
The loss or failure of an organ or tissue is one of the most frequent, devastating, and costly problems in human health care [1,2]. Existing approaches to repair or replace damaged bone have focused on bone grafting techniques; however, they are limited by supply problems, disease transmission, immune responses, and c…