Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The birth of a crystal is initiated by a nucleus from which the crystal grows--a dust grain in a snowflake is a familiar example. These nuclei can be heterogeneous defects, like the dust grain, or homogeneous nuclei which are intrinsic to the material. Here we study homogeneous nucleation in nanoscale polymer droplets…
This paper presents mathematical expressions of dc and ac flashover discharge characteristic constants (n and N) of polluted insulators. It's shown that the proposed relationships of n and N are not static and they depend on the parameters of the equivalent electrical circuit and thermal characteristics of discharge.…
In the present paper we describe the surface modification of alumina nanoparticles using epoxy-containing alkoxysilanes (silane coupling agents, SCA). The materials were characterized using infrared spectroscopy and solid-state nuclear magnetic resonance. Whereas, neat alumina nanoparticles could be expectedly modifie…
We synthesized stable Au−Cu 2 S core−shell-type hybrid nanocrystals, in which the spherical Au core encapsulates in the disk-type Cu 2 S nanocrystals (avg. size = 7 ± 1 nm), using the simple in situ solvothermal growth of Cu 2 S on Au nanoparticle seeds. Binding energy and band gap measurement provides evidence for th…
In order to predict the behavior of concrete structures under impulsive loading it is not only essential to be able to model the dynamic strength and other strain rate dependent properties of the material, but also to describe realistically the damage and the softening process of the material. Various material models…
Interest in and thereby also development of ordered mesoporous silicates as drug delivery devices have grown immensely over the past few years. On hand selected cases from the literature, the power of such systems as delivery devices has been established. Specifically, it is shown how it is possible to enhance the rel…
BACKGROUND: During production and processing of multi-walled carbon nanotubes (MWCNTs), they may be inhaled and may enter the pulmonary circulation. It is essential that interactions with involved body fluids like the pulmonary surfactant, the blood and others are investigated, particularly as these interactions could…
An unprecedented Au(18) thiacrown directed by Au(I)···Au(I) interactions and supported by tridentate phosphine (dpepp) and μ(3)-sulfido ligands that highly resembles the 18-membered thiacrown ether [18]aneS(6) in appearance has been synthesized. The sulfides of the Au(3)(μ(3)-S) units in the central cavity point towar…
The study described in this article explored the effect of adding different types of carbon materials (graphite powder and three types of carbon fibre), fly ash (with 5.6%, 15.9% and 24.3% Fe2O3), and a mix of both on electromagnetic interference (EMI) shielding in Portland cement pastes. The parameters studied includ…
By means of molecular-dynamics simulations, temperature-driven diffusionless structural phase transitions in equiatomic and nearly equiatomic ordered nickel-titanium alloys were investigated. For this purpose, a model potential from the literature was adopted [W. S. Lai and B. X. Liu, J. Phys.: Condens. Matter 12, L53…
In recent years a great interest in the study of the association of magnetic with biological material for bioapplications has been observed in the literature. This work analyses the development of new magnetic biocomposite films from a magnetic ferrite and a biopolymer. Magnetic and dielectric properties of Y3Fe5O12 (…
Questions of project management, current situation in this field, management reforms of the scientific and scientific-technical activities of the Russian government are considered.
The technique of surface impregnation in the vibrated bed for getting ferric sulfuric microcomposites and composite materials on their basis is considered. The industrial safety aspect, namely air protection of the operating space is described.
The results of extraction-photometric method of determining anionic synthetic surface-active substances (SAS) by some trimethadione cyanic dyestuff are described. Under optimal conditions of determining anionic synthetic surface-active substances the suggested reagents allow to increase selectivity and to decrease tox…
Basic directions of increase of Palestine medical institutions efficiency on the basis of application of marketing technologies (as an example of Al-Shifa hospital) are defined. Some preconditions for marketing application through modernization of medical institutions are considered. The essence of the basic modern ma…
The following problems are considered - transport infrastructure marketing support, innovation development of its material component, relevant legislative environment based on needs of the territories where infrastructural entities become localized.
The concept of sustainable development and its factors, innovation activity role in the enterprise development are considered. Necessity of the control system development for the sustainability support is proved. It is considered a guarantee of the enterprises survival under the market system of management.
Structural imperfections of the Rostov region natural management are considered. They underlie ecological problems and the effects on the natural and mental environment.
The construction concept, the structural features and the experimental results of dynamic behaviour of industrial electropneumatic servo drives built on the ground of the mechatronic approach are described. It is proved that such drives are of high precision and operation speed.
Radial non-linear dynamic performance of drilling operation on various stages is considered. Effect of some factors on non-linear dynamic performance is analysed. Special attention is paid to dynamics of radial oscillatory motions of the drill taking into account hole accuracy.