Materials Literature
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This paper aims to demonstrate an approach to the calculation of zero phase sequence impedance for power transformers using finite numerical methods. Specifically concentrating on 3-limb, core type, YNyn connected transformers where no accurate solution is available. An understanding of the physical factors affecting…
A brief review of quasielastic incoherent neutron scattering (QINS) experiments on superprotonic conductors is presented. The theoretical analysis of the results is discussed in terms of a number of different mechanisms for proton conduction and diffusion, notably the Grotthuss, mixed, vehicle and molecular diffusion…
The use of an aqueous electrolyte containing dissolved CO2 enabled revealing of an unusually intense photoemission from a bulk silver electrode. The observed cathodic photocurrent exhibits a sharp peak at ∼360 nm corresponding to the energy of surface plasmons in silver. The amount and the spectral distribution of the…
We present new spectroscopic data for the eclipsing, pre-main-sequence binary TY CrA. Absorption lines from the secondary and from a previously unknown tertiary are detected, including Li I 6708 Å in both stars which supports the pre-main-sequence status of the system. Radial velocities of the primary and secondary ar…
Follows a presentation at a symposium in 1993 where the authors presented an experimental investigation on a fluttering membrane for use in a wind‐tunnel. Analyses the fluttering of an object by a theoretical method. Compares the experimental results with those of the theoretical and discusses their effectiveness. Sta…
Abstract This paper presents the results of a study into the physical, chemical and mineralogical composition of two glacial sediments in Dublin, Ireland which are colloquially called Dublin ‘brown’ and ‘black boulder clays’. The objective of this study was to ascertain whether the ‘brown’ was formed through weatherin…
The aim of the finite element approach presented is to quantify the in-service elastic strains induced by variations of magnetic induction in structures made of soft ferromagnetic materials. Both strains induced by surface and body magnetic forces and pure magnetostriction strains are considered.>
The stress corrosion cracking (SCC) behavior of four austenitic Fe-32% Mn-9% Al alloys containing ≈ 1 wt% carbon was studied. All of the four alloys were susceptible to SCC in room temperature and 160°C NaCl solution. SCC was enhanced by applying an anodic potential. The crack path was transgranular, and cleavage-like…
The bulk photovoltaic effect (BPE) has been investigated in lead zirconate titanate (PZT) thin films. Measurements of the kinetics, spectral distribution and photocurrent hysteresis loops have been made. In the extrinsic spectral region, the steady-state photocurrent is primarily due to the BPE, where the photovoltaic…
Abstract The statistical theory of bound rubber and the polymer-filler gel formation theory are shown to offer a satisfactory quantitative description of a set of experimental bound-rubber data recently obtained by Wolff, Wang, Tan (R ubber C hem . T echnol . 66 , 163 (1993)) on SBR compounds filled with 17 furnace bl…
Abstract The thermal isomerizations of 1′,3′,3′‐trimethyl‐spiro[2 H ‐1‐benzopyran‐2,2′‐indoline]‐6‐sulphonic acid (6‐SO ‐SP) between its spiro (SP) and merocyanine (MC) forms were followed spectrophotometrically in the presence of cyclodextrins (β‐ and γ‐CDs) at various pressures. From the pressure dependence of the i…
Abstract The use of emulsion polymerization to prepare core–shell rubber (CSR) toughening particles with different shell thickness‐to‐core diameter ratios is described. The conditions leading to controlled particle size and morphology are discussed. The particle shell is crosslinked during the synthesis so that its in…
Published measurements describing the high strain rate constitutive behaviour of oxygen-free high-conductivity (OFHC) and commercially pure copper are limited and show considerable scatter. To provide additional data, a direct impact compressive split Hopkinson bar was miniaturized to utilize specimens, 640 μm in diam…
Abstract The interaction between rubber and carbon black in compounds for road tire treads has been analyzed by using mechanical and dynamical measurements in three cured compounds based on SBRs. The rubbers were prepared in solution by anionic polymerization, and coupled with tin compounds in which the carbon-tin bon…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransition State of the Silicon-Directed Aldol Reaction: An ab Initio Molecular Orbital StudyBenjamin W. Gung, Zhaohai Zhu, and Rebecca A. FouchCite this: J. Org. Chem. 1995, 60, 9, 2860–2864Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Hydroxide Ion on the Cis-Trans Thermal Isomerization of Azobenzene DerivativesAna M. Sanchez and Rita H. RossiCite this: J. Org. Chem. 1995, 60, 10, 2974–2976Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inissue 1 May 1…
The corrosion behaviour of glassflake epoxy coatings on steel substrate with and without an adhesion promoter was examined by electrochemical impedance spectroscopy. The impedance data show that an improvement in the protective behaviour of the coating is connected with a large increase in the resistance in the pores…
Accurate prediction of the thermomechanical responses of particle beds in fusion blankets depends strongly on the availability of experimental data on their thermal properties as a function of the blanket operating conditions. In this study, a series of experiments is conducted to measure the effective thermal conduct…
The usefulness of x‐ray photoelectron spectroscopy to study surface structural aspects of polymer electrolytes has been demonstrated by its application to complexes of poly(ethylene oxide) with lithium perchlorate or copper perchlorate in various molar ratios. The binding energies for various core level electrons of t…
Morphological investigations of specimens of Navicula gregaria, N. cryptocephala, N. cryptocephala var. exilis, N. capitatoradiata, N. veneta and N. phyllepta were performed using light and electron microscopy. Both type and modem samples were examined. The typification of each taxon was reviewed; Patrick's typificati…