Functional methods in the theory of magnetoimpurity states of electrons in quantum wires

Functional methods are used to study magnetoimpurity states of electrons in nanostructures. The Keldysh formalism is applied to these states. The theory is illustrated using a quantum wire sample with impurity atoms capable of localizing electrons in a magnetic field. The characteristics of magnetoimpurity states of electrons in the wire are calculated using the model of a Gaussian separable potential.Comment: 15 pages, 1 figur

“Red banditry” as a Socio-Political Phenomenon of the Early 1920s (based on Materials from the Northern Kuzbass)

The relevance of the study is due to the presence of conflicts in the social and civil spheres of life both in modern Russia and in the world. A historical excursion into the problem under consideration will help to identify the causes of the confrontation in social conflicts, to develop measures aimed at eliminating and overcoming them. The article discusses the issues associated with the emergence of red banditry in the northern part of the modern Kemerovo region after the end of the Civil War. New archival materials are being introduced into scientific circulation. The novelty of the study is that based on the analysis of the data, the conclusions of researchers involved in the history of red banditry in Siberia are corrected. The author dwells on the facts of the manifestation of red banditry in the Mariinsky district of Tomsk province, reveals the essence of this phenomenon. It is proved that the causes of this phenomenon, in addition to the negative reaction of the Soviet government to the Kolchak regime, the low level of political and spiritual culture of representatives of the new government, the strong influence of partisans, the emergence of a sense of impunity and permissiveness, included such reasons as personal contempt and hostility between ordinary residents, as well as basic desire to appropriate another's property

Asymptotic high energy behavior of the deeply virtual Compton scattering amplitude

We compute the deeply virtual Compton scattering (DVCS) amplitude for forward and backward scattering in the asymptotic limit. Since this calculation does not assume ordering of the transverse momenta, it includes important logarithmic contributions that are beyond those summed by the DGLAP evolution. These contributions lead to a power-like behavior for the forward DVCS amplitude.Comment: Latex, 22 pages, 5 Figures; references enhanced; typos correcte

Stages in formalizing energy conservation and efficiency management in industrial enterprises

This study introduces a method to formalize mathematical target setting at managing energy conservation and efficiency in enterprises. The suggested approach is based on energy conservation positioning, which reflects the link between company's management team and its energy efficiency policy. This project implementation aims to increase competitiveness of enterprises in a range of industries

Resummation of double logarithms in electroweak high energy processes

At future linear $e^+e^-$ collider experiments in the TeV range, Sudakov double logarithms originating from massive boson exchange can lead to significant corrections to the cross sections of the observable processes. These effects are important for the high precision objectives of the Next Linear Collider. We use the infrared evolution equation, based on a gauge invariant dispersive method, to obtain double logarithmic asymptotics of scattering amplitudes and discuss how it can be applied, in the case of broken gauge symmetry, to the Standard Model of electroweak processes. We discuss the double logarithmic effects to both non-radiative processes and to processes accompanied by soft gauge boson emission. In all cases the Sudakov double logarithms are found to exponentiate. We also discuss double logarithmic effects of a non-Sudakov type which appear in Regge-like processes.Comment: 26 pages, 3 figures, Latex2

Mathematical model of stacked one-sided arrangement of the burners

Paper is aimed at computer simulation of the turbulent methane-air combustion in upgraded U-shaped boiler unit. To reduce the temperature in the flame and hence NOx release every burner output was reduced, but the number of the burners was increased. The subject of studying: complex of characteristics with space-time fields in the upgraded steam boiler E-370 with natural circulation. The flare structure, temperature and concentrations were determined computationally

Nonperturbative contributions to the quark form factor at high energy

The analysis of nonperturbative effects in high energy asymptotics of the electomagnetic quark form factor is presented. It is shown that the nonperturbative effects determine the initial value for the perturbative evolution of the quark form factor and find their general structure with respect to the high energy asymptotics. Within the Wilson integral formalism which is natural for investigation of the soft, IR sensitive, part of the factorized form factor, the structure of the instanton induced effects in the evolution equation is discussed. It is demonstrated that the instanton contributions result in the finite renormalization of the subleading perturbative result and numerically are characterized by small factor reflecting the diluteness of the QCD vacuum within the instanton liquid model. The relevance of the IR renormalon induced effects in high energy asymptotic behaviour is discussed. The consequences of the various analytization procedures of the strong coupling constant in the IR domain are considered.Comment: REVTeX, 12 pages, 1 figure. Important references and discussions added, misprints corrected, minor changes in tex

CONTROVERSIAL QUESTIONS IN TREATMENT OF IATROGENIC BILE DUCT INJURIES: WAYS OF DECISION

Purpose: Iatrogenic bile duct injuries (BDI) is an important problem in abdominal surgery. According to the literature, different methods of surgical reconstruction are performed in patients with BDI. The most frequent procedure is the Roux-en-Y hepaticojejunostomy (HJS) which recommended by most authors.Materials and Methods: 66 patients with BDI were admitted to our hospital and operated on in period of 1997-2013. Primary end-to-end ductal repair was used in 2 cases in 1-2 days after injury without T-tube drainage and in the third case 5 day after the accident using forenamed drainage. Successful right hemihepatectomy was performed in 1 patient; in 62 patients - Roux-en-Y HJS, 23 among them using our antireflux modification of the anastomosis (Russian Fed. Patent N 2470592).Results: There were the following criteria for research: wound infection, cholangitis attacks, anastomotic leak, period of time for postoperative blood- and liver function analyses restitution. Total 30-days mortality was 1,5% (1 patient). Mortality wasn’t registered in the group of antireflux interventions. Estimation of follow-up results showed the advantages of the proposal method.Summary: The method of choice in surgery of iatrogenic BDI and subsequent biliary ductal obstruction due to BDI is repair using antireflux Roux-en-Y HJS

AREFLUX ANASTOMOSES IN SURGERY OF BENIGN BILIARY STRICTURES

Purpose: to improve on the results of biliodigestive (BD) reconstructive operations for benign biliary strictures using of arefl ux modifi cation of hepatico-/choledochojejunostomy (HJS/CJS) (Russian Fed.Patent No2470592) .Material and methods; a valve mechanism of proposed BD-anastomosis was studied on 14 organ complexes. Clinical researches based on comparable studies of postoperative period in two groupsof patients: I (control group) included 44 patients operated on using standard surgical procedure, II – 31 patients were undergone BD reconstruction with arefl ux valve.Results: estimation of postoperative period by such parameters as dynamics of blood analyses, complications, symptoms of dyspepsia and quality of life showed advantages in II group of patients.Summary: use of arefl ux modifi cation of HJS/CJS allows reach the better results of postoperative period on parameters of comlications and quality of life in compare with standard method of BD reconstruction

Soil cover structure and transformation of morphometric parameters of Haplic Chernozems under no-tillage

The results of the field experiment have been analyzed, it was set up on two experimental fields (with an area of 2.4 hectares each), where two different agricultural techniques – traditional and no-till – were applied. Diagnostics of morphometric parameters of typical chernozems such as: the thickness of the A1 horizon, A1 + AB horizons and the depth of carbonates reaction with 10% HCl, has shown that some changes in soils and soil cover had occurred in the fields over 8 years. The integral indicator of soil productivity is the thickness of the humus horizon, it demonstrated trends to decrease and increase in the soil cover structure of the experimental fields with different compositions of chernozem subtypes. The trends result from both climate change and periodic dry periods, which are not typical of the region, and from the change of traditional technology to no-till. The carbonates leaching from chernozem profiles in all variants of the experiment decreased, which correlates well with climatic indicators, changing with the seasons of the year. Chernozems with thin humus layaer and reacting with HCl close to the surface do not require liming. The revealed changes are not statistically significant, they reflect the resistance of chernozems to the variability of natural and anthropogenic factors of soil formation. Crop residues on the soil surface under no-tillage reduce physical evaporation, which contributes to moisture accumulation in the soil. The use of cover crops in winter also increases the moisture reserves, which are consumed by the plants during the summer growing season. Information on the transformation of morphometric parameters allows making temporal and spatial corrections in the applied agricultural practices (crop rotation, fertilization, the use of cover crops, herbicides and pesticides)