219 research outputs found
CORE 2.1 (COmpendium of RElations, Version 2.1)
The present CORE 2.1 (COmpendium of RElations, Version 2.1) contains various
formulas and relations used in the practical calculations in the Standard
Model. The properties of the Pauli, Dirac, Gell--Mann matrices, wave functions
of free fermions and gauge bosons are considered. We present the full
Lagrangian of the Standard Model and the corresponding Feynman rules. The
method of the evaluation of the Feynman (loop) integrals and calculations in
non-covariant gauges is considered. We discuss in brief the relativistic
kinematic and present a large number of the matrix elements of the various
processes in the Standard Model.Comment: 108 pages, the full text is submitted as four compressed and
uuencoded PostScript file
CORE 3.1 (COmpendium of RElations, Version 3.1)
The present CORE 3.1 (COmpendium of RElations, Version 3.1) contains various
formulas and relations used in the practical calculations in the Standard
Model. The properties of the Pauli, Dirac, Gell--Mann matrices, wave functions
of free fermions and gauge bosons are considered. We present the full
Lagrangian of the Standard Model and the corresponding Feynman rules. The
method of the evaluation of the Feynman (loop) integrals and calculations in
non-covariant gauges is considered. We discuss in brief the relativistic
kinematic and present a large number of the matrix elements of the various
processes in the Standard Model.Comment: 80 pages, 21 figures, scripts.sty. arXiv admin note: substantial text
overlap with arXiv:hep-ph/950745
Probing a Nucleon Spin Structure at TESLA by the Real Polarized Gamma Beam
The recent proposals concerning the usage of the real polarized gamma beam,
obtained by the Compton backscattering of the laser photons off the electron
beams from either the linear or circular accelerators were considered. The
heavy quark photoproduction process giving a unique opportunity to measure
polarized gluon distribution was investigated.Comment: 16 pages, LATEX, 6 figures (EPS
An integrated approach to assess the complications of deforming osteoarthritis in sports medicine
Objective: prognosis of thromboembolic complications using clinical diagnostic markers.Materials and methods. The study involved 151 patients who underwent total arthroplasty (TA) of large joints of the lower extremities. Blood serum was studied at the patient’s admission to the hospital, after surgery, and at discharge from the hospital. The following parameters were determined: cell-molecular marker vascular endothelial growth factor (VEGF), a genetic study was performed using the “Plasma screen. Plasma factors of the blood clotting system”. The content of VEGF was determined in blood serum using solid-phase enzyme immunoassay. The effectiveness of diagnostics based on sensitivity and specificity analysis was considered by constructing a ROC analysis at different points of separation of the values of the studied indicators.Results. Diagnostic significance of VEGF and the efficiency of determining PAI-1 were determined. In patients with elevated VEGF values (>183.6 pg/ml), PAI-1 gene polymorphism was detected, which reduces the fibrinolytic activity of the blood system and increases the risk of coronary disorders. This is especially important for patients in a hospital with a large number of risk factors for the development of VTEC due to prolonged immobilization of the limb. The study made it possible to determine that with VEGF values up to 183.6 pg/ml, a low probability of thromboembolic complications is predicted, and with values above 183.6 pg/ml — high.Conclusion. The course of DOA in athletes may be complicated by surgical intra-articular interventions of traumatological and orthopedic profile, which does not exclude the development of VTEO, significantly complicating drug therapy and the rehabilitation period. The presented data show that the determination of VEGF, 5G-675 4G polymorphism of the PAI 1 gene in blood serum can be used to assess the risk of venous thromboembolic complications (VTE), contributing to modern informative diagnostics, improving the quality of life of athletes and prolonging their sports career
Design of Drum Type Apparatus for Processing of Bulk Materials
The article presents the development and research of drum continuous mixers, most attention is paid to the results of theoretical (using of cybernetic approach) and experimental studies of longitudinal mixing particulate material in rotating drums of continuous action, the influence of internal recycles of material flows, intensifying the process of smoothing the input fluctuations. The authors analyzed the influence of internal recycles material flows, intensifying the process of smoothing the input fluctuations. The results presented in this paper were obtained by the experiments on the smoothing ability determination during which they change the frequency of the drum rotation, the location of the Г-shaped mixer blades on the drum mixer. The article reported that the studies were conducted on three mixtures which components have different physical and mechanical systems with various dispersed liquid additives and without it
Experimental determination of the adhesive characteristics of the “elementary fiber-epoxy matrix” system
The paper considers the method of testing the elementary fiber-polymer matrix system. Results of determining the following adhesive characteristics are provided: apparent and local adhesive strength, start and end in the adhesive destruction of the fiber-matrix joint under study. Basalt fiber and epoxy matrix based on the epoxy resin and amine hardener are considered as the study objects. Influence of the samples geometric characteristics on their adhesive characteristics is established. The paper shows that at the depth of the elementary fiber emersion in the polymer matrix equal to 200 µm, the scatter of all determined adhesive characteristics is significantly reduced
Study of the state of hypoxia of the renal tissue in patients with oxalate urolithiasis
Objective: tto determine the contribution of key metabolites and enzymes, taking into account the polymorphism of the latter, in the development of oxalic urolithiasis.Materials and methods: the study included 72 patients (30 men and 42 women) with previously confirmed oxalic urolithiasis. Blood samples were taken from patients previously divided into groups depending on the stage of treatment. Lactate, lactate dehydrogenase, protein-bound hydroxyproline, homocysteine, malondialdehyde, and glutathione peroxidase in blood were determined, the polymorphism of the MTHFR gene was studied.Results: the change in the concentration of the studied markers in the serum of different groups of patients suffering from oxalate urolithiasis was found; differences in the polymorphism of the MTHFR gene responsible for the metabolic transformations of homocysteine in the organism of patients with oxalate urolithiasis were established.Conclusion: one of the chains of the development of oxalate urolithiasis was studied on the example of markers of hypoxia of the renal tissue
Wavelet structure of surface fields of atmospheric total protein concentration in the vicinity of Novosibirsk
Analysis of the results of wavelet and harmonic analysis of the experimental data on the mass concentration of atmospheric aerosol and the total protein concentration in the surface air near Novosibirsk in 2001-2002 has been made. The wavelet analysis of the data has shown that the surface air concentration variations are mainly determined by characteristic synoptic processes with periods of 4, 7, 10, and 15 days. The results of the harmonic analysis have shown that the synoptic variations generally range from 40 to 70% of the total variance of the concentration variations, and they reach 90% in spring
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