Materials Literature
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An essential part of the description of a reconstructive phase transition consists in the determination of the so-called transition path, which defines the possible atomic displacements and lattice strains that occur during the transformation. We present a systematic procedure for the determination of possible transit…
Metamaterials are artificial structures with unique electromagnetic properties, such as relative dielectric permittivity and magnetic permeability with values less than 1, or even negative. Because these properties are so sensitive to loss, we have developed metamaterials comprised of superconducting waveguides, wires…
The angle-dependent reflectivity of several surface structures was analyzed and evaluated with the viewpoint of solar cell applications. Numerical analysis showed that a Si subwavelength structure (SWS) maintains a lower reflectivity at large incident angles than conventional light-trapping techniques such as a random…
The effect of a pulsed dc on the sintering of copper spheres to copper plates was investigated. It was shown that the current had a marked effect on neck growth between the spheres and the plates. The enhancement of sintering under the effect of the current was attributed to electromigration. Microstructural observati…
Big pharma's business model, which relies on a few blockbusters to generate profits, is clearly broken. Patent expiration on numerous blockbusters in recent years is already altering the drug landscape. Drug companies are also facing other challenges that necessitate development and implementation of novel R&D strateg…
CdSe quantum dot (QD)-phthalocyanine (Pc) conjugates were prepared as energy transfer donor-acceptor pairs, and the efficiency of the energy transfer process in this system was investigated as a function of QD size and under different surface chemistry conditions. The kinetics and efficiency of the energy transfer pro…
Polypyrrole (PPy) films were galvanostatically deposited on 99.9 wt. (%) aluminum electrodes from aqueous solutions containing each carboxylic acid: tartaric, oxalic or citric. Scanning Electron Microscopy (SEM) was used to analyze the morphology of the aluminum surfaces coated with the polymeric films. It was observe…
The primary purpose of the present study was to determine the viability of using incinerator ash and slag from municipal solid waste as a secondary source of cementitious materials. The combustion products used were taken from two types of Spanish MSW incinerators, one located at Valdemingómez, in Madrid, and the othe…
The purpose of the present study was to analyze the effect of the structural differences in four polycarboxylate and polyether admixtures on the rheological properties of cement pastes with different chemical and mineralogical compositions and different active additions (CEM I 42.5 R, CEM I 52.5 R, CEM I 52.5 N/SR, CE…
The dynamic model of the test bench for helicopter vanes longerons are described and studied in the paper. Model was developed to determining a vibration level, which pass to ambient space. The global aim of presented work - to optimize the vibroprotection of dynamic test bench.
Results of experimental investigations of the riders parameters considered. The riders contact with the samples covered by metal-fluoroplastic.
According to the results of experimental research the wear of drill and the corresponding changes of vibroacoustic signal intensity in the cutting zone and the consuming power of spindle rotation engine at the fixed supply of forth are considered.
In work the processes of structure formation of a pipe steel under action of various kinds and modes of heat treatment (at furnace or induction heating) are investigated. The efficiency of induction hardening of oil-and-gas pipes from an intercritical interval of temperatures is shown. This mode in a combination with…
The article provides the analysis of algorithmization as one of the forms of formalization used as a logical and epistemological means to construct abstract mathematical objects in terms of classical rationality. Mathematical theorized knowledge is considered in the article as an object of consolidation and minimizati…
We present results of measurements of electrical, magnetic and thermal properties of EuB$_{5.99}$C$_{0.01}$. The observed anomalously large negative magnetoresistance as above, so below the Curie temperature of ferromagnetic ordering $T_C$ is attributed to fluctuations in carbon concentration. Below $T_C$ the carbon r…
A new liquid formulation of commercial bismaleimide and n-acryloylmorpholine was prepared that could be UV cured as an alternative to traditional thermal cure methods presently used for BMI in the industry. UV curing was shown to be an efficient method which promoted the reaction rate significantly and was able to ach…
In this study, novel amphiphilic fluorescent copolymers poly(N-vinylpyrrolidone)-b-poly(N-methacryloyl-N'-(α-naphthyl)thiourea) (PVP-b-PNT) were synthesized via ATRP with poly(N-vinylpyrrolidone)-Cl as macroinitiator and N-methacryloyl-N'-α-naphthylthiourea (NT) as hydrophobic segment. PVP-b-PNT copolymers were charac…
Authors give the solution of linear discrete difference equation of infinite order, in the sequences space., They propose description of correspondence difference operators in the classes of infinite matrix operators.
The Central bank conducts a monetary policy. The targets of monetary policy are an unemployment, inflation, economic growth, stability financial markets. The main problem of monetary policy it is impossible to control all this targets. The Bank of Russia realizes a monetary target to. The main target of Bank of Russia…
Daily speech of the person proves, that «the structure of language is not settled only by intellectual or sound factors» [1]. Corresponding language installation lays in a basis of the mechanism of speech, reading and lettering in each concrete language. Using of theoretically-methodological positions of the theory of…