77 research outputs found
On the angular distribution of extensive air showers
Angular distributions of extensive air showers with different number of
charged particles in the range 2.5x10^5--4x10^7 are derived using the
experimental data obtained with the EAS MSU array. Possible approximations of
the obtained distributions with different empiric functions available in
literature, are analysed. It is shown that the exponential function provides
the best approximation of the angular distributions in the sense of the
chi-squared criterion.Comment: 5 pages including 1 figur
Superconductivity in the Cuprates as a Consequence of Antiferromagnetism and a Large Hole Density of States
We briefly review a theory for the cuprates that has been recently proposed
based on the movement and interaction of holes in antiferromagnetic (AF)
backgrounds. A robust peak in the hole density of states (DOS) is crucial to
produce a large critical temperature once a source of hole attraction is
identified. The predictions of this scenario are compared with experiments. The
stability of the calculations after modifying some of the original assumptions
is addressed. We find that if the dispersion is changed from an
antiferromagnetic band at half-filling to a tight binding
narrow band at , the main conclusions of the approach remain
basically the same i.e. superconductivity appears in the -channel and is enhanced by a large DOS. The main features
distinguishing these ideas from more standard theories based on
antiferromagnetic correlations are here discussed.Comment: RevTex, 7 pages, 5 figures are available on reques
DEPENDENCE OF BENDING INFLEXIBILITY AND STRETCHING MODULE OF METAL CORD ON ITS TECHNICAL CHARACTERISTICS
The dependence of bending rigidity and stretching module of metal-cord of skeleton construction Jxdl+J8xd2 on its physical-mechanical characteristics is investigated
MASTERING OF FLAT BAND PRODUCTION FOR HIGH-LOADED HYDRAULIC HOSES
The different methods at determination of tensile strength and cross-sectional area of flat wire are analyzed. Such technological parameters as drawing-out and widening at upset spreading are examined
Patient-specific fluid–structure interaction model of bile flow: comparison between 1-way and 2-way algorithms
Gallbladder disease is one of the most spread pathologies in the world. Despite the number of operations dealing with biliary surgery increases, the number of postoperative complications is also high. The aim of this study is to show the influence of the biliary system pathology on bile flow character and to numerically assess the effect of surgical operation (cholecystectomy) on the fluid dynamics in the extrahepatic biliary tree, and also to reveal the difference between 1-way and 2-way FSI algorithms on the results. Moreover, the bile viscosity and biliary tree geometry influence on the choledynamics were evaluated. Bile velocity, pressure, wall shear stress (WSS), displacements and von Mises stress distributions in the extrahepatic biliary tree are presented, and comparison is made between a healthy and a lithogenic bile. The patient-specific biliary tree model is created using magnetic resonance imaging (MRI) and imported in a commercial finite element analysis software. It is found that in the case of lithogenic bile, velocities have lower magnitude while pressures are higher. Furthermore, stress analysis of the bile ducts shows that the WSS distribution is found mostly prevailing in the common hepatic duct and common bile duct areas. It is shown that when it is necessary to evaluate the bile flow dynamics in urgent medical situations, 1-way analysis is acceptable. Nevertheless, 2-way FSI provides more accurate data, if necessary to evaluate the stress–strain state of bile ducts. The proposed model can be applied to medical practice to reduce the number of post-operative complications
ALGORITHMS OF PROCESSING OF STEELS MICRO STRUCTURE IMAGES FOR DETERMINATION OF INTERPLATE DISTANCES OF FERRITE AND CEMENTITE
The methods of computer analysis, based on binarization of image for calculation of inter-plate distance in eutectic colonies of pearlite steel are offered. Algorithms for determination of function of inter-plate distance, that allows to increase informativeness of microstructure investigations and level of automation in determination of inter-plate distance, are developed
Nonlinear mechanism of spontaneous combustion in the reaction of fluorine with deuterium
SYSTEM ANALYSIS OF INTERRELATIONS BETWEEN SPECTRAL CHARACTERISTICS OF THE STEEL MICROSTRUCTURE PICTURE AND ITS MECHANICAL CHARACTERISTICS IN METALLURGICAL PRODUCTION
It is shown that spectral characteristics of functions of closeness of the pearlite inter-plate distances, determined by image of the rolled wire samples microstructures, correlate with its mechanical characteristics and also with characteristics of wire, produced of it
STATISTICAL ANALYSIS OF INTERRELATIONS BETWEEN ROD CHARACTERISTICS AND DEFORMATION PROPERTIES OF PRODUCED WIRE
Analysis of interconnection between characteristics of rolled wire and deformational characteristics of produced of it wire in conditions of RUP «BMZ» is investigated. It is shown that the higher degree of wire delamination the lower characteristics of curling
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