Materials Literature
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The output force–strain relationship typical of the performance of Terfenol-D transducers under varied operating conditions is examined to study transducer blocked-force characteristics. The design and construction of a transducer for testing under controlled thermal, magnetic and mechanical load conditions are descri…
Abstract This paper describes a rare occurrence of nontronite associated with sulfide-bearing felsic metavolcanics, providing evidence of colloidal deposition in open spaces as result of a low-temperature water-rock interaction. Microbotryoidal masses of green nontronite with impurities of kaolinite, illite, barite, a…
The Rákos-stream is a small stream near Budapest (Hungary). The water of the stream is considerably polluted with communal and industrial wastewaters. In May and September 2001 benthic diatom samples were collected along the stream, in May from the surface of available water plants and gravel. In September samples fro…
Abstract The tensile properties of cross‐linked and uncross‐linked composite films (thickness ∼20–35 μm) prepared from Hydroxypropylcellulose (HPC) with incorporation of microcrystalline cellulose fibers (Avicel) were studied. The concentration of fibers in the composites ranged from 0 to 30 w/w% and cross‐linked comp…
Water-soluble porphyrins tend to form self-aggregates under certain conditions. The structure of the self-aggregate (H-type dimer, H-type higher aggregate, or J-aggregate) sensitively depends on the structure of the peripheral substituents at the meso-positions of the porphyrin. Water-soluble porphyrins also form rela…
In order to investigate transient space charge phenomena, it is essential that the space charge profile be observed at a high repetition rate. We have developed a new space charge measurement system using the pulsed electroacoustic (PEA) method, which can measure the space charge profiles every 10 /spl mu/s. It employ…
The ability of three-way catalysts (TWCs) to effectively remove CO and NO x from the exhaust is directly controlled by the air-fuel ratio at which the accompanying engine is operated. In a stoichiometric engine, small variations in the air-fuel ratio have large effects on the catalyst performance. These effects includ…
Abstract The effect of fluoride ion concentration and pH on the corrosion behavior of TCA (60 Ti 10 Ag 30 Cu), which is a new Ti alloy with low melting point, pure Titanium (Ti), and TAV (TiAl6V4) was examined using open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) at different potentials.…
The objective of this study was to determine some of the properties of experimental particleboard panels made from black locust (Robinia pseudoacacia L.). The furnish contained soundwood, partially decayed wood, branchwood, and bark that was mixed at different ratios and used to manufacture 30 panels. Modulus of elast…
We report the first systematic study of H 2 O speciation in dacitic melt with total dissolved H 2 O ranging from 1.4 to 2.6 wt%. Samples were heated in a one-atmosphere tube furnace at 480-590 °C for certain durations and then quenched in water or air. Species concentrations were measured with Fourier transform infrar…
Abstract It is shown that sol‐gel alumina calcined at 400 0 C is a very efficient catalyst for the epoxidation of cyclohexene and cyclooctene with aqueous 70 wt % hydrogen peroxide. The overall yield per g of catalyst was 0.28 mol of cyclohexene oxide in 5 cycles of 450 min each and 0.43 mol of cyclooctene oxide in 4…
Microscale Laser Shock Peening (LSP) is a technique that can be potentially applied to manipulate the residual stress distributions in metal film structures and thus improve the reliability of micro-devices. This paper reports high-spatial-resolution characterization of shock treated copper thin films on single-crysta…
The optical power spectrum of a signal externally modulated using a Mach-Zehnder modulator is calculated analytically. Optical power spectra are calculated for binary signals for which the drive signal has either raised-cosine or Bessel-filtered pulse shape as well as for duobinary signals created by Bessel filtering.…
Abstract Coordination-organized porphyrin dimers of 5,15-bis[2-(allyloxycarbonyl)ethyl]- and bis[3-(allyloxy)propyl]-20-(1-methyl-2-imidazolyl)porphyrinatozinc were covalently linked by an intramolecular olefin metathesis reaction in excellent yields (93–98%). It was found that the yields of the intramolecular metathe…
For many, the thought of terrorists detonating a dirty bomb--a radiological dispersal device--is frightening. However, the radiation health risks from such an occurrence are small. For most people directly involved, the exposure would have an estimated lifetime health risk that is comparable to the health risk from sm…
Abstract A novel cyan‐bridged macrocyclic nickel complex [{NiL 1 }{Fe(bipy)(CN) 4 }]2·5H 2 O 1 (L 1 = 3,10‐dimethyl‐1,3,6,8,10,12‐hexaazacyclotetradecane, bipy = 2,2‐bipyridine) was synthesized and structurally characterized. The complex exhibits one‐dimensional zigzag chain structures. Each ferrous(II) ion connects t…
Abstract Sorbed water molecules in PET (around 1% in mass) lead to classic plasticizing effects, basically evidenced by a decrease of the glass transition ( T g ) and of the cold crystallisation ( T c ) temperatures with increasing water content. During drawing of dry PET film and depending on the draw ratio, the init…
A tromino (rhymes with domino) is a shape made up of three 1 × 1 squares assembled as shown. Figure 1 A tromino We will classify a variety of nearly rectangular shapes into those that can be tiled by trominoes and those that cannot. From now on we will simply say tiled to mean tiled by trominoes. We will consider shap…
The presence of aluminum oxyhydroxide and its micromorphological characteristics in sclerotium grains were examined by SEM, TEM, and EDX analyses. A spherical fraction with a diameter of 100 nm, which contained C and Al as the predominant elements, was recognized as the unit particle of the matrix of sclerotium grains…
A test for evaluating oilfield corrosion inhibitors using ultrasound has been developed recently. This paper describes experiments that have been undertaken to try and determine some of the processes that occur at the electrode surface during the test. Measurements were taken with both polarization resistance and elec…