Two- and Three-particle States in a Nonrelativistic Four-fermion Model in the Fine-tuning Renormalization Scheme. Goldstone mode "against" extension theory

In a nonrelativistic contact four-fermion model we show that simple regularisation prescriptions together with a definite fine-tuning of the cut-off-parameter dependence of ``bare'' quantities give the exact solutions for the two-particle sector and Goldstone modes. Their correspondence with the self-adjoint extension into Pontryagin space is established leading to self-adjoint semi-bounded Hamiltonians in three-particle sectors as well. Renormalized Faddeev equations for the bound states with Fredholm properties are obtained and analysed.Comment: 23 pages, LaTeX, changed content, added references and two figures, to appear in the Few Body System

New Test of Supernova Electron Neutrino Emission using Sudbury Neutrino Observatory Sensitivity to the Diffuse Supernova Neutrino Background

Supernovae are rare nearby, but they are not rare in the Universe, and all past core-collapse supernovae contributed to the Diffuse Supernova Neutrino Background (DSNB), for which the near-term detection prospects are very good. The Super-Kamiokande limit on the DSNB electron {\it antineutrino} flux, $\phi(E_\nu > 19.3 {\rm MeV}) < 1.2$ cm$^{-2}$ s$^{-1}$, is just above the range of recent theoretical predictions based on the measured star formation rate history. We show that the Sudbury Neutrino Observatory should be able to test the corresponding DSNB electron {\it neutrino} flux with a sensitivity as low as $\phi(22.5 < E_\nu < 32.5 {\rm MeV}) \simeq 6$ cm$^{-2}$ s$^{-1}$, improving the existing Mont Blanc limit by about three orders of magnitude. While conventional supernova models predict comparable electron neutrino and antineutrino fluxes, it is often considered that the first (and forward-directed) SN 1987A event in the Kamiokande-II detector should be attributed to electron-neutrino scattering with an electron, which would require a substantially enhanced electron neutrino flux. We show that with the required enhancements in either the burst or thermal phase $\nu_e$ fluxes, the DSNB electron neutrino flux would generally be detectable in the Sudbury Neutrino Observatory. A direct experimental test could then resolve one of the enduring mysteries of SN 1987A: whether the first Kamiokande-II event reveals a serious misunderstanding of supernova physics, or was simply an unlikely statistical fluctuation. Thus the electron neutrino sensitivity of the Sudbury Neutrino Observatory is an important complement to the electron antineutrino sensitivity of Super-Kamiokande in the quest to understand the DSNB.Comment: 10 pages, 3 figure

The role of apical support and rectal mucosal prolapse excision in successful treatment of rectocele combined with perineum descending: short-term and follow-up results

The aim of the research was to improve the results of surgery treatment of posterior compartment of pelvic floor using abdominal sacrocolpopexy and stapled trance-anal resection (STARR

Berry Phase in Neutrino Oscillations

We study the Berry phase in neutrino oscillations for both Dirac and Majorana neutrinos. In order to have a Berry phase, the neutrino oscillations must occur in a varying medium, the neutrino-background interactions must depend on at least two independent densities, and also there must be CP violation if the neutrino interactions with matter are mediated only by the standard model W and Z boson exchanges which implies that there must be at least three generations of neutrinos. The CP violating Majorana phases do not play a role in generating a Berry phase. We show that a natural way to satisfy the conditions for the generation of a Berry phase is to have sterile neutrinos with active-sterile neutrino mixing, in which case at least two active and one sterile neutrinos are required. If there are additional new CP violating flavor changing interactions, it is also possible to have a non-zero Berry phase with just two generations.Comment: RevTex 16 pages, no figures, new discussions about sterile neutrino added,typos corrected and errors in references correcte

The advantages of the abdominal sacral colpopexy combined with stapled trance-anal resection of the rectal mucosal prolapse (STARR) for the surgical treament of perineum descending syndrome

The problem of pelvic organ prolapse in women is still actual, because of high frequency of this pathology. Several surgical techniques have been suggested for pelvic descending syndrome treatment. But a large number of complications, unsatisfactory anatomical and functional results of suggested methods force to look for other solutions of the proble

ENSURING PERSONNEL INVOLVEMENT IN COMPANIES’ SUSTAINABLE DEVELOPMENT

At the present stage of development of society and economy, there is a reassessment of values and guidelines in the field of management. The main resource for the life and development of the company is a person. Every company leader dreams of engaged employees, working harder and better, taking initiative, and high productivity. Engagement is a behavior in which the employee is fully emotionally and intellectually involved in a certain activity, wants to make additional effort. One of the key topics that a modern company leader is interested in is creating a special organizational environment in which people work consciously, look for ways to improve, put their knowledge at the service of the business and take on more responsibility. Therefore, it is very important to focus on the internal environment in which employees interact with each other.The article examines the relationship between staff involvement and sustainable development of the company. Highly engaged companies have the best financial performance in their industry. The main sources of engagement at the moment are research by consulting companies and, to a lesser extent, practice-oriented publications. The paper analyzes the proposed approaches to increase employee engagement and proposes a comprehensive method for managing employee engagement. The purpose of the study is to determine the optimal approach to personnel engagement management.The objectives of the research are reduced to the description of the method (PDCA), which includes a description of the approach for taking measurements, filling in the incoming questionnaire blocks, taking into account the current situation and the company's strategy, an algorithm for working with the results obtained and examples of practices to increase engagement.The results of the study are the content of key blocks of assessment, analytical tools for assessing involvement, an algorithm for working with assessment results to make a decision to increase involvement

Prompt muon contribution to the flux underwater

We present high energy spectra and zenith-angle distributions of the atmospheric muons computed for the depths of the locations of the underwater neutrino telescopes. We compare the calculations with the data obtained in the Baikal and the AMANDA muon experiments. The prompt muon contribution to the muon flux underwater due to recent perturbative QCD-based models of the charm production is expected to be observable at depths of the large underwater neutrino telescopes. This appears to be probable even at rather shallow depths (1-2 km), provided that the energy threshold for muon detection is raised above $\sim 100$ TeV.Comment: 7 pages, RevTeX, 7 eps figures, final version to be published in Phys.Rev.D; a few changes made in the text and the figures, an approximation formula for muon spectra at the sea level, the muon zenith-angle distribution table data and references adde

ОБЕСПЕЧЕНИЕ ВОВЛЕЧЕННОСТИ ПЕРСОНАЛА В УСТОЙЧИВОЕ РАЗВИТИЕ КОМПАНИИ

At the present stage of development of society and economy, there is a reassessment of values and guidelines in the field of management. The main resource for the life and development of the company is a person. Every company leader dreams of engaged employees, working harder and better, taking initiative, and high productivity. Engagement is a behavior in which the employee is fully emotionally and intellectually involved in a certain activity, wants to make additional effort. One of the key topics that a modern company leader is interested in is creating a special organizational environment in which people work consciously, look for ways to improve, put their knowledge at the service of the business and take on more responsibility. Therefore, it is very important to focus on the internal environment in which employees interact with each other.The article examines the relationship between staff involvement and sustainable development of the company. Highly engaged companies have the best financial performance in their industry. The main sources of engagement at the moment are research by consulting companies and, to a lesser extent, practice-oriented publications. The paper analyzes the proposed approaches to increase employee engagement and proposes a comprehensive method for managing employee engagement. The purpose of the study is to determine the optimal approach to personnel engagement management.The objectives of the research are reduced to the description of the method (PDCA), which includes a description of the approach for taking measurements, filling in the incoming questionnaire blocks, taking into account the current situation and the company's strategy, an algorithm for working with the results obtained and examples of practices to increase engagement.The results of the study are the content of key blocks of assessment, analytical tools for assessing involvement, an algorithm for working with assessment results to make a decision to increase involvement.На современном этапе развития общества и экономики идет переоценка ценностей и ориентиров в области управления. Основным ресурсом для жизни и развития компании выступает человек. Каждый руководитель компании мечтает о вовлеченных сотрудниках, работающих больше и лучше, проявляющих инициативу, с высокой производительностью труда. Вовлеченность – поведение, в ходе которого работник полностью эмоционально и интеллектуально вовлечен в определенную деятельность, хочет сделать дополнительное усилие. Одна из ключевых тем, которой интересуется современный руководитель компании, – это создание особой организационной среды, когда люди работают сознательно, ищут пути усовершенствования, ставят на службу делу свои знания и берут на себя больше ответственности. Поэтому очень важно делать акцент на внутренней среде, в которой взаимодействуют между собой сотрудники.В статье рассматривается связь вовлеченности персонала с устойчивым развитием компании. Компании с высоким уровнем вовлеченности демонстрируют лучшие финансовые показатели в своей отрасли. Основными источниками по вовлеченности в настоящий момент являются исследования консалтинговых компаний и в меньшей степени – практикоориентированные издания. В работе проведен анализ предлагаемых подходов по повышению вовлеченности сотрудников и предложен комплексный метод управления вовлеченностью в компании. Цель исследования состоит в определении оптимального подхода к управлению вовлеченностью персонала.Задачи исследования сводятся к представлению метода (PDCA), в который входит описание подхода проведения замера, наполнение входящих блоков анкеты с учетом текущей ситуации и стратегии компании, алгоритм работы с полученными результатами и примеры практик по повышению вовлеченности.Результатами исследования являются содержание ключевых блоков оценки, аналитические инструменты оценки вовлеченности, алгоритм работы с результатами оценки для принятия решения по повышению вовлеченности

Three-particle States in Nonrelativistic Four-fermion Model

On a nonrelativistic contact four-fermion model we have shown that the simple Lambda-cut-off prescription together with definite fine-tuning of the Lambda dependency of "bare"quantities lead to self-adjoint semi-bounded Hamiltonian in one-, two- and three-particle sectors. The fixed self-adjoint extension and exact solutions in two-particle sector completely define three-particle problem. The renormalized Faddeev equations for the bound states with Fredholm properties are obtained and analyzed.Comment: 9 pages, LaTex, no figure

Fluxes of atmospheric muons underwater depending on the small-x gluon density

The prompt muon contribution to the deep-sea atmospheric muon flux can serve as a tool for probing into the small-x feature of the gluon density inside of a nucleon, if the muon energy threshold could be lifted to 100 TeV. The prompt muon flux underwater is calculated taking into consideration predictions of recent charm production models in which the small-x behaviour of the gluon distribution is probed. We discuss the possibility of distinguishing the PQCD models of the charm production differing in the small-x exponent of the gluon distribution, in measurements of the muon flux at energies 10-100 TeV with neutrino telescopes.Comment: 9 pages, 4 eps figures, uses iopart.st