Materials Literature
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A loop antenna using a left-handed transmission line is proposed. The antenna has a one wavelength circumference and gives an omnidirectional pattern in the plane of the loop, whilst working in an eta = 0 mode. In contrast, a conventional right-handed loop with the same dimensions has a figure of eight pattern in the…
The glycolytic enzyme phosphoglycerate enolase (PGE) catalyses the step from 2-phosphoglycerate to phosphoenolpyruvate in glycolysis. A control analysis of PGE on growth, glycolytic flux and product formation in Lactococcus lactis subsp. lactis IL1403 is presented. A library of strains with a modulated expression of P…
Nanostructures in the form of thin films, nanoparticles, nanoporous materials, nanocomposites, and bulk nanocrystalline materials are of interest both for basic scientific research and technological applications as their properties are dominated by the extremely large specific surface areas. Such surfaces have general…
Integration of polymer self assembly with semiconductor processing enables sub-lithographic patterning of integrated circuit (IC) device elements and offers a non-traditional pathway to performance improvements (Black, 2005). We discuss target applications including surface-roughening for on-chip decoupling capacitors…
Single-walled boron nanotubes (BNTs), which has been synthesized successfully recently, were imagined as duals (hexagonal pyramidal structures) of carbon nanotubes (CNTs) in the literature. In this work, we call attention to the fact that BNTs are not limited to hexagonal pyramidal structures constructed from the so-c…
The main challenge in designing diagnostic devices able to move along the colon is their locomotion method. Manipulating friction with the colonic surface is a key requirement for their safe and atraumatic propagation. One possible solution is to generate friction by means of adhesive forces. For this reason, a diagno…
This work aimed to study the corrosion inhibition of carbon steel in 2 M HCl solutions using some aminopyrimidine derivatives. In this investigation the techniques of measurements were: weight loss, linear polarization, impedance and corrosion penetration. The inhibitory effect of the investigated compounds resulted f…
Effective control of cathode airflow in a direct fired solid oxide fuel cell gas turbine (SOFC/GT) hybrid power system is critical to thermal management of a fuel cell stack. Hybrid fuel cell turbine designs often incorporate the use of a valved hot air bypass in parallel with the cathode flow to divert a portion of t…
Nanostructured films find increasing industrial application for instance in membranes, gas sensors, fuel cells, catalytic layers, biocompatible surfaces, batteries, and electronic components. The performance of these functional layers can be improved by using nanoparticles as building blocks and thereby incorporating…
In order to evaluate the deterioration characteristics during the lifecycle of bridge rubber bearing, a series of long-term accelerated exposure tests are performed on four kinds of rubber materials widely utilized for bridge bearings. Different degradation factors are applied in these tests, such as thermal oxidation…
Experiments performed on split Hopkinson pressure bar(SHPB) with a large diameter of 75 mm show that the dynamic stress-strain curve of anthracite of Yunjialing coal mine is of distinct plastic yield characteristics; and the initial elastic modulus,yield strength,as well as the ultimate strength go up with strain rate…
To analyze the market demand of bromine retardant. Although phosphorous retardant has begun to be produced in large producers under strict environmental evaluation worldwide,it is estimated that bromine retardant,esp. DBDPO,still has great future in the next ten years.
Phonon transfer in yttrium-oxide (Y 2 O 3 ) stabilized ZrO 2 ceramics is studied experimentally in the range of helium temperatures (1.7–3.8 K). A model of the structure of the intergranular layer in the ceramic is considered, which explains the temperature dependence of the phonon diffusion coefficient, makes it poss…
Scanning pyroelectric microscopy (SPEM) was applied to investigate grown-in polarity in trans-4-chloro-4'-nitrostilbene (CNS) single crystals. Sectors {011} and {011} were scanned for cross sections perpendicular to the a-direction. A rotational analysis for {011}, {011} faces was performed for a needle like crystal t…
The structural evolution of a material is calculated using a phenomenological grain-refinement and failure model based on the relation between these two processes. Direct extrusion and various schemes of twist extrusion are compared, and the effect of pressure is considered. The results obtained are used to draw concl…
Microscopic mechanism of martensitic transformation in nickel (Ni)–titanium (Ti) alloy is investigated by molecular dynamics (MD) simulation using embedded atom method (EAM) potentials. The computational parallelepiped specimen with nano-size dimension is surrounded by Ti-terminated free surfaces and constrained regio…
We demonstrated diamond processing using a variable pressure scanning electron microscope. Dents were formed in diamond by electron beam irradiation in air, nitrogen gas, oxygen gas, and water vapor. The processing in oxygen atmosphere showed the highest efficiency. The processing mechanism can be explained in terms o…
The stresses and the textures of electroplated copper films were studied using the X-ray diffraction analysis. The results show that the stresses in the films are always tensile. The films have (110) fiber texture at different thickness from 8 to 60 μm. From strain energy minimization point of view, the grains with (1…
Abstract The electronic band structure of NiO in the ferromagnetic state is calculated using the B3LYP hybrid density functional, the Hartree–Fock (HF) method, and the GW approximation (GWA) with dielectric functions constructed using either B3LYP or HF wave functions and energy eigenvalues. The band structure from th…
A porous material having near zero thermal expansion (NZTE) around room temperature was developed. This material was prepared by sintering a mixture of SiC, vitrified bonding material (VBM) and LiAlSiO4 at 850°C. LiAlSiO4 was added in different weight proportions, and it was found that a change in the amount of LiAlSi…