Materials Literature
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Results regarding the development of Lake Rėkyva (Lithuania) are presented. Radiocarbon dating, pollen and diatom analysis enabled to reveal Late Pleistocene and Holocene conditions in the lake and its environs. Lake Rėkyva sediments were drilled from the ice surface. Organogenic sediments occur in a 2-m thick layer.…
We consider the promising properties of very simple Diffractive Optical Elements (DOE) for reshaping the intensity profile of a laser beam. The first type of DOE that we have considered is a phase aperture which consists in a transparent plate with a circular relief introducing a π phase shift in the central region of…
Sensors for temperature detection can be achieved with platinum films. After these metallic films have been fabricated, measurements of the electrical resistance will correspond to the temperature of the film. Although metals have a well characterized temperature‐resistance relationship, this relationship changes if o…
In recent years there is a trend in industry to limit the usage of chemical compounds. Natural polymers are new promising materials that possess important properties like biodegrability or lack of toxicity. Radiation processing of natural occurring polymers is an area of current research for development of new applica…
The results of the development of modal liquid crystal wavefront correctors are reviewed. The modal principle of control is described. Characteristics and examples of application of electrically and optically controlled lenses and multichannel correctors with a tunable response function in different systems are report…
International audience
This paper provides a brief review of the (mainly in-situ) electrochemical methods that have been applied to coatings to assess corrosion protection ability. It discusses particularly the electrochemical noise measurement (ENM) which although still being developed has shown considerable promise as a method for assessi…
Gears made from Case-carburised SAE8620H steel were subjected to contact fatigue testing at different contact stress levels in the Gear Test Rig facility at Newcastle University. The High frequency Magnetic Barkhausen Noise (MBN) measurements were made at different intervals of fatigue cycles. The MBN signal level gra…
The Sichuan Basin is one of the most representative basins in Cretaceous terrestrial basin, in which a suite of red clastic deposition, especially gypsum and desert facies had been widely deposited. Based on previous study, climate marker of clay minerals, composition of the rocks, this study discusses climate and its…
A three-dimensional needled carbon fiber reinforced silicon carbide(3D needled C/SiC)ceramic matrix composite in the through-the-thickness direction was fabricated by the chemical vapor infiltration process.The resulting composite has a bulk density of 2.15 g/cm~3 and an open porosity of 16%.The adjacent layers for th…
Existing composite insulators’ sheds are easily bridged by icicles and their ice flashover performance is not obviously superior to that of glass and porcelain insulators. For the rational design and selection of composite insulators’ shed applied in icing area, the 3-D fluid field mathematical model of composite insu…
In this paper,natural pyrethrum nano-capsule with a wall of the copolymer of styrene(St) and methyl methactylate(MMA) was prepared by means of microemulsion polymerization.The influence of emulsifier content,shell-core ration on particle size,size distribution,structure of nano-capsules was studied.The microemulsion i…
In order to explore the relationships among the thickness of radar absorbing material(RAM),the volume content of absorbents in the RAM and the microwave absorption property,the radar absorbing material employed the carbonyl iron powder and ethylene-propylene-diene monomer(EPDM) as its absorbent and matrix was prepared…
Anatase TiO2 thin films were deposited in a d.c. reactive magnetron sputtering system. It was found that there is a strong dependence between anatase-rutil structures of TiO2 films and the technological conditions, the most relevant parameter being the oxygen percentage from the argon and oxygen mixture. Our measureme…
In this work, we develop a rapid polymerase chain reaction (PCR) device with thermoelectric cooling for the fast PCR thermo cycling process. The PCR system utilizes a 60W commercial thermoelectric module, the Tianjin TEC1-12710 model, which allows fast heating and rapid cooling in the PCR temperature cycles. In this s…
High voltage square impulses from converter can make stator insulation of inverter-fed motors damaged much earlier. There are many differences in insulation aging mechanism between under continuous impulses and under sine waves. In order to test insulation properties under continuous impulses, a new insulation aging t…
Silica-ammonium chloride nanotubes, generated by the condensation of sodium silicate onto ammonium cation-modified anionic sodium dodecyl sulfate (SDS) micellular templates, readily create hierarchical structures through the self-assembly into thicker nanotubes, belts, and ultimately into centimetre long macrofibers.…
Nine coordinated [Ln(quercetin) 3 ]nH 2 O complexes were synthesized in non-aqueous solution (where, n = 0 for Pr, Sm, Gd, Tb, Dy and Ho; n = 3, for La and Nd). The complexes were characterized by elemental analysis, molar conductance, UV – vis spectra, IR spectra, thermal analysis and NMR spectra. The optimized struc…
In the lighting industry, the concept of ceramic cold cathodes provided with an inside tungsten coating is under consideration to be applied in mercury-free fluorescent lamps for advertising purposes. In this regard, the applicability of chemical solution deposition to fabricate metallic films on the inner surface of…
In this paper, we give a review of recent transition path search methods for nanoscale phase transition simulation A potential energy surface (PES) characterizes detailed information about phase transitions where the transition path is related to a minimum energy path on the PES. The minimum energy path connects react…