Materials Literature
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Determination of module temperature coefficients for voltage, current and power requires measuring the average of cell temperatures. Conventional practice is to place thermocouples or resistive temperature devices (RTDs) at a few locations on a module's back surface and to average the readings, which may not accuratel…
In this study, we use low-cost spray deposition to study the possibility of using an earth-abundant ZrO2film as a antireflection and passivation layer on p-type Si. Structural, optical and electrical properties of the spray-deposited ZrO2 film were investigated. Spray deposited ZrO2is highly transparent with a refract…
The proposed model represents a micro-heterogeneous medium with random properties of elastic-brittle microstructure elements and with fractures forming during the deformation of structurally heterogeneous materials. The probability of stress exceeding the ultimate strength in one element determines the probability of…
This paper discusses the viability of using Germanium Telluride (GeTe) thin films as reconfigurable antennas. The reconfiguration technique is based on altering the phase of GeTe from a conductive crystalline state to a highly resistive amorphous state or vice versa. Using a laser to alter the phase, any antenna geome…
A marching on-in-time (MOT) scheme for analyzing transient electromagnetic wave interactions on devices consisting of graphene sheets and dielectric substrates is proposed. The MOT scheme discretizes time domain resistive boundary condition (TD-RBC) and Poggio-Miller-Chang-Harrington-Wu-Tsai (TD-PMCHWT) integral equat…
We analyze the transmission response of a periodic metasurface, synthesized to refract a wave from a specified incidence angle into a specified transmission angle, as the angle of incidence is swept over the whole visible region. We compare this metasurface, that is characterized by a continuous susceptibility functio…
We propose a simple and robust method for simulating bi-anisotropic metasurfaces as electromagnetic spatial discontinuity problems in the Finite Difference Frequency Domain (FDFD) scheme. The method consists in embedding a numerical version of the Generalized Sheet Transition Conditions (GSTCs) in the finite differenc…
BACKGROUND & OBJECTIVES: Vascular illnesses are on the rise in India, due to increase in lifestyle diseases and demographic transition, requiring intervention to save life, organ or limbs using vascular prosthesis. The aim of this study was to develop indigenous large diameter vascular graft for treatment of patients…
In this paper the selection of parameters of single-phase shunt active power filter (APF) was described. The considered APF was controlled with using p-q algorithm. The purpose of the filter is to eliminate the harmonics of current source and power factor correction. The model of the APF with follower PI controller of…
Abstract Ka Loko Dam, in Kauai, Hawaii, failed suddenly and catastrophically on March 14, 2006. The resulting breachwas marked by three topographic benches, the lowest of which exposed native volcanic deposits once resident in the dam foundation. These deposits were found to contain outcrops of a waxy, gel-like materi…
In Content-Centric Networks (CCN), multiple routers may cache the same content, which makes it possible to retrieve the content chunks in parallel. In this paper, we propose Multi-Source Request and Transmission mechanism (MSRT) for CCN. We develop a MinMax problem to compute the optimal solution to retrieve all the c…
Single crystals consisting various surface morphologies and epitaxial structures were applied to investigate the effect of other phase regions in the vicinity of a given tethered chains-covered area having a certain molecular weight of amorphous brushes. The designed experiments demonstrated that regardless of the typ…
Composites with titanium oxide structures on the surface of a polymer matrix were prepared by preliminary plasma activation of polytetrafluoroethylene films, followed by chemical treatment with vapors of titanium tetrachloride and water. The chemical composition and structure of the modified film surface were studied…
The structure and properties of the butt-welded joints of a 1565ch M aluminum alloy with AMg5, AMg6, AV (60661), and 7021 alloys that were performed by friction welding with mixing are studied. The mechanical properties of these joints and their fracture zones are determined as functions of a combination of the alloys…
This paper focuses on some aspects of the mechanical behaviour of a discoidal switching flux permanent magnet generator in three sections. The first one deals with torque ripple reduction by the identification of the optimal rotor tooth size. The second one focus on the common problem of the rotor's mechanical strengt…
Определение напряженного состояния в очаге деформации при поверхностном пластическом деформировании является важной задачей для осуществления технологического процесса и оказывает непосредственное влияние на технологическое качество и эксплуатационные характеристики деталей машин и изделия в целом.На основе теории мал…
Most aggregates used in concrete are from natural origin, obtained from quarries or dredged from the river- or sea-bed. Natural aggregates are finite in quantity and their exploitation isn’t without effect on fauna and flora. Therefore the demand for recycling aggregates has been increasing for a couple of years. Thes…
The proposed method allows defining the nuclear magnetic/quadrupole resonance (NMR/NQR) signal with use the previously famous parameters of the signal for detecting substance. The result of the detection this signal is the detection and identification of the substance. The method is based on the convolution of the pat…
Partial discharge acoustic monitoring is an important tool in assessing the health of power equipment. Traditionally, the acoustic sensor is made of piezoelectric transducer (PZT), and is packaged in a metal tube. Recently, the advancement in fiber-optic sensor technology provides clear benefits in such applications,…
Conventional online monitoring techniques used for monitoring the levels of contamination on high voltage insulators, such as leakage current and partial discharge, are not effective in dry conditions since they require the surface of the insulator to be wetted by fog, rain, condensation or snow. In order to address t…