Materials Literature
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The aim of this paper is to investigate the asymptotic behavior of solutions to the limit unstable Cahn-Hilliard equation with inertial term $$ \partial_t^2 u + \partial_t u + \Delta ( \Delta u + | u |^{p-1} u)=0, \quad {\rm in } \quad (0,\infty) \times {\mathbb{R}}^n. $$ We shall prove the unique global existence of…
The intrinsic optical bistability (OB) of graded core-shell granular composites is investigated. The coated particles are made of cores with gradient dielectric function ∊ c (r) = A(r/a) k and nonlinear shells. In view of the exponential distribution of the core dielectric constant, the potential functions of each reg…
An electrochemical investigation was conducted to evaluate the corrosion behavior of iron in deionized water (DIW) and medium salt in the pH range of 1 to 4. The times of immersion of the electrode in solutions were changed in the range of 0 to 120 hours. Corrosion currents were determined using the linear polarizatio…
This chapter considers some fascinating ways animals use chemical cues to find their way home. It notes that the sensory system used for finding the way may vary, but in many instances, chemical sensing appears fundamental in lower vertebrates as well as in invertebrates. It defines what migration, navigation, and ori…
In the present study, microcrystalline cellulose (MCC) has been used as a substitute for carboxymethyl cellulose (CMC) in the manufacturing of liquid detergents with the aim to bring out a product comparable between the two derivatives of cellulose in terms of thickening property and cost economics. Liquid detergent s…
An integrated optimization approach based on Box-Behnken design of experiment and response surface methodology of analysis has been used for optimization of micro-injection molding process with respect to the tensile properties of polypropylene dog-bone-shaped bars. It is found that the response surface models of brea…
) and resultant product can be used for various applications due to its conductivity, antibacterial and ion exchange properties. Prominently used Nu are I , SCN , OH , N 3 , phthalimide anion and concentrated alkali solution in the presence of O 2 as oxidants.
The traditional photocatalysts, represented by TiO 2 , can only utilize ultraviolet light. The low solar energy utilization and low quantum efficiency of the photocatalysts seriously limit their wide applications. In recent years, we have carried out a series of studies on the novel nano-sized photocatalysts with high…
The synthesis, spectroscopy and magnetic characterization of five new dinuclear copper(II) complexes are described. All five compounds have the general formula [Cu2(L)4(O-R)2](Cl)2 or [Cu2(L)2(Cl)2](Cl)2, in which R = CH3 or H, L=2, 3 or 4-pyridinemethanol as L2, L3 or L4, respectively. The title compounds consist of…
We combine block copolymer directed self-assembly with nanoimprint lithography to generate templates with rectangular patterns through an original double imprint process. We use a rotary e-beam tool to separately expose circumferential and radial line/space chemical contrast patterns with periodicities commensurate to…
Ferroresonance can severely affect voltage transformers, causing quality and security problems. The possibility of appearing a ferroresonance phenomenon is mainly based on an existing series connected capacitance and a nonlinear inductance. However, factors that may influence on it are not only limited to these consid…
Novel poly(urethane-azomethine-thiourea)s (PUATs) were synthesized via one-step polymerization from newly prepared diol chain extender (1,4-phenylene bis((E)-1-(4-hydroxobenzylidene)thiourea) (PBHBT)), containing C=S and –C=N– linkages, along with 1,4-phenylene diisocyanate (PDI) as hard segments and 20, 40 and 60 mol…
A multi-physics computations-based methodology for space debris hypervelocity impact (HVI) damage mitigation is presented. Specifically, improved debris mitigation through development of innovative, lightweight structural designs is described. The methodology has been applied to the design of the Solar Probe Plus (SPP…
Partial discharges (PDs) in polymer insulation are characterised by features that change as the insulation defect ages and progresses to total failure. This study presents results of an experimental investigation into evolution of PD spectral features. Typical insulation defects in polyethylene insulation were exposed…
Problem statement: Recently Optical electro negativity of many binary oxide glasses has been evaluated on the basis of two different parameters, the linear refractive index and the energy gap, which have demonstrated remarkable correlation. Approach: In the present study, an improvement method to estimate the oxide io…
A synthesis technique for reflectarray antennas is here proposed, aimed to allow a multi-frequency design of an antenna whose degrees of freedom are, apart from the standard ones, also the element positions and the reflecting surface shape. The approach is based on a proper multi-frequency formulation that allows to o…
OpenSees is an open source object oriented software framework developed at UC Berekeley and currently supported by PEER and Nees. OpenSees has so far been focussed on providing an advanced computational tool for analysing the non-linear response of structural frames subjected to seismic excitations. Given that OpenSee…
A sub-grain size finite element modelling approach is presented in this paper to investigate variations in fracture mechanics parameters for irregular crack paths. The results can be used when modelling intergranular and transgranular crack growth where creep and fatigue are the dominant failure mechanisms and their c…
Phosphorus flame retardants, bis(2,6-dimethylphenyl) phenyl phosphonate (BDMPP) and poly(bisphenol S phenyl phosphonate) (PBSPP), were synthesized and their structures were characterized with Fourier transform infrared spectroscopy, and 1H and 31P nuclear magnetic resonance. The phosphorus compounds were used to impar…
Enhanced photovoltaic performance of BiFeO3(BFO) material by utilizing graphene and carbon nanotubes (CNT) as transparent electrodes is compared for the first time. The short circuit current density and open circuit voltage are measured to be 34μA/cm2, 2.4μA/cm2, 0.27V and 0.31V by utilizing graphene and carbon nanotu…