Materials Literature
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In the design of inter-satellite laser communication terminal, the diffraction effects are raised in the optical system, when we operate at the wavelength of 1550nm. This is because of the line of sight stabilization in space domain. In this paper, we designed various cassgrains which operates at aforementioned wavele…
This work investigated several methods for improving the wear resistance of the 42CrMo4 tool steel used for coke-crushing hammers. The methods embraced heat treatment for obtaining different combinations of strength and ductility of the bulk steel, and surface-engineering processes comprising TiN thin-film deposition…
In this contribution we will present our research activities recently developed at Roma Tre University in the field of plasmonic nanoparticles for biosensing applications. We show several innovative sensing platforms, operating in the visible and near-infrared frequency regime. The contribution of our group regards to…
In this paper, a numerical simulation model for 252kV puffer circuit breaker is constructed, and a novel concept of transparent arc root is introduced to suppress the unwanted arc column contraction. The novel methods have been implemented into PHOENICS and verified successfully by measurement. The arcing process of N…
Micro - and nanostructures of molybdenum trioxide (MoO3) have been investigated intensively for sensorial and electrochromic systems. MoO3nanostructures were grown by a rapid thermal oxidation of molybdenum at 1000 °C in oxygen environment. Its structural, morphological and optical properties were studied using scanni…
In this paper the NHDMOC method which succeeded in studying stress wave propagation with one dimensional strain was applied to study the one-dimensional stress wave propagation. In this paper, the ZWT nonlinear visco-elastic constitutive relationship with 7 parameters to NHDMOC, and corresponding equations were deduce…
Zwitterion functionalisation is carried out to alter surface properties and hence disperability of carbon nanotubes by attaching short and long alkyl hydrocarbon chains onto the nanotubes. Long chain attachment results in long term stabilisation of the carbon nanotubes in toluene, whereas short chain simply enhances t…
A new unsymmetrical photochromic diarylethene compound 1-[(2-methyl-5-(2-pyridyl)-3-thienyl)]-2-{2-methyl-5-[2-(1,3-dioxolane)]-3-thienyl} perfluorocyclopentene1Owas synthesized. The optoelectronic properties, including photochromism, fluorescences switch and optical recording were investigated in both solution and a…
The effects of nanophase additions on the thermoelectric properties of n-type AgPb18SbTe20 fabricated by combining fast melting and hot pressing were investigated. The presence of sovelthermally syntheszied AgPb18SbTe20 nanospheres or nanorods in the bulk yields remarkably improved thermoelectric properties. Nanophase…
Microcrystalline silicon thin films prepared by plasma enhanced chemical vapor deposition (PECVD). Effects of deposition power on the microstructure properties of the thin films were investigated by Raman spectrometry, Fourier transform infrared absorption spectroscopy (FTIR) and atomic force microscopy (AFM). With in…
In this paper, the influence of the position of the metallic signal strips on the cutoff characteristic of dominant mode and field patterns in a novel rectangular-shaped microshield lines with dual signal lines are calculated by edge-based finite element method. The cutoff wavelength can be adjusted by changing the di…
This paper presents the series solutions in Hamiltonian form for plane sectorial domain of the nonlocal linear elasticity originally proposed by Eringen [. Based on the Hamiltonian governing equations of plane elasticity for sectorial domain, the variable separation and eigenfunction expansion techniques were employed…
Concrete is a porous material in which several chemical reactions may develop. One way to handle such a complex set of reactions is to use a modified form of Petersen matrix notation which is described in the paper. This formulation of Petersen matrix is able to handle the case where some of the reactions involved in…
A single layer of organic solar cells with the Al/P3HT/PEDOT: PSS/ITO structure on glass substrate was investigated in this paper, and examined the performance of the polymer solar cells by changing 60, 70 and 80 nm thickness of the P3HT active layer. These devices had better absorption in the active layer and poor ch…
A novel anticaking material was prepared from from Bentonite, Biological Carbon and abandoned animal/plant oil in this study. In order to determine the optimal dosage of bentonite, biological carbon and abandoned animal/plant oil, the experiments has been performed systematically. The effect of anticaking materials wa…
본 연구에서는 소듐냉각 고속로 붕괴열교환기(DHX)의 고온 설계 및 크리프-피로 손상 평가를 수행하였다. 제 4 세대 소듐냉각 고속로의 능동 및 피동 잔열제거계통에 설치되는 DHX 와 한국원자력연구원의 STELLA-1 시험루프에 설치된 DHX 에 대해 상세설계 및 3D 유한요소해석을 수행하고, 동 결과에 기초하여 고온설계 기술기준인 ASME Section Ⅲ Subsection NH 와 RCC-MR 코드를 따라 크리프-피로 손상평가를 수행하였다. 크리프-피로 손상평가 결과에 기초하여 두 설계기준에 대해 비교 분석하고, 설계 기술기준의 보수성 이슈에 대해 토의하였다.
Monitoring of the electrical equipment condition by means of regular diagnostic measurements is an effective diagnostic tool for the prediction of service failures. It can be utilized to improve the asset management strategies and the maintenance planning of distribution network operators (DNOs) utilities and transmis…
Nanostructures have been proved to be an efficient way of modifying/improving the performance of GaN-based light-emitting-diodes (LEDs). The achievements in photon management include strain relaxation, light extraction enhancement, radiation pattern control, and white light devices. In this review we discuss the impac…
Abstract The copper‐catalyzed coupling between aryl Grignard reagents and alkyl bromides is optimized to provide intermediates for use in the synthesis of novel cholesteric liquid crystals.
In this paper,a Fe/cr-v - WC flux-cored wire welding alloy which used in weapons parts wear surfacing is developed. By the analysis of the average hardness of surfacing welding layer, the wear weightlessness and the microstructure, the wear resistance properties of surfacing welding alloy is studied. And the cored in…