On a scale-invariant Fermi gas in a time-dependent harmonic potential

We investigate a scale-invariant two-component Fermi gas in a time-dependent isotropic harmonic potential. The exact time evolution of the density distribution in position space in any spatial dimension is obtained. Two experimentally relevant examples, an abrupt change and a periodic modulation of the trapping frequency are solved. Small deviations from scale invariance and isotropy of the confinement are addressed within first order perturbation theory. We discuss the consequences for experiments with ultracold quantum gases such as the excitation of a tower of undamped breathing modes and a new alternative for measuring the Tan contact.Comment: 6+3 pages, 2 figures; revised and extended versio

Analysis of the level of labor potential development in higher educational institutions of Ukraine: competitiveness of university graduates

The article focuses on the possibility of using the criterion of competitiveness of domestic higher education institutions in the international labor market to analyze the level of development of labor potential of a particular university. In the article the relationship between the level of professional competence of future professionals and the quality of labor potential of universities which were involved in their formation and development. This article contains statistical information on the results of participation of Ukrainian university students in international student competitions, which the author used to characterize the quality of professional institutions in the field of competitiveness of future specialists. In addition, the article contains generalizations as for the possibility of usage the competitiveness feature level of graduates as an indicator (index) of the quality of university's labor potential

Державне управління якістю вищої освіти: менеджмент на рівні особистості

The article defined the directions of state management of the higher education quality, with taking into account peculiarities of manifestation (perception) of its contents on the individuality level. The article draws attention to the importance of aim to obtain higher education for ensuring its quality and also determined the place and role of the state in the corresponding process. In addition, the article determines the place and role of career guidance work in the system of higher education quality assurance, and presents a list of basic normative legal documents, which regulate relevant field of work. The article contains proposals for improving the normative legal mechanism of state management of the higher education quality.В статті визначено напрями державного управління якістю вищої освіти з прийняттям до уваги особливостей прояву (сприйняття) її змісту на індивідуальному рівні. В статті звернуто увагу на значущість мети здобуття вищої освіти для забезпечення її якості, а також визначено місце та роль держави у відповідному процесі. Крім того, стаття містить узагальнення щодо місця та ролі профорієнтаційної роботи в системі забезпечення якості вищої освіти, а також подано перелік основних нормативно-правових документів, які регламентують відповідний напрям роботи. Стаття містить пропозиції щодо вдосконалення нормативно-правового механізму державного управління якістю вищої освіти

Інститут корпоративного університету та його досвід для розвитку трудового потенціалу класичного вищого навчального закладу

This article focuses on some historical aspects of the formation and development of corporate training centers with taking into account the peculiarities of their functioning within a modern system of vocational education. In the article there is defined the categorical meaning of corporate education, and formulated the goal of corporate functioning of the institution. This article contains the author's opinion on the content of category definitions of corporate education and corporate university, and the results justify the importance of relevant experience of the Institute for the development of labor potential of classic form of higher education. In addition, the article presents generalizations about the possibility of using the traditional mechanisms of corporate universities to develop their own labor potential, within the system of classical universities in terms of improving the content of vocational training of subjects and objects of the educational process.Акцентується увага на окремих історичних аспектах формування та розвитку корпоративних навчальних центрів з прийняттям до уваги особливостей їх функціонування у межах сучасної системи професійної освіти. Визначено категоріальний зміст корпоративної освіти, а також сформульовано мету функціонування корпоративного навчального закладу. Викладено авторську думку щодо змісту визначень категорій корпоративної освіти та корпоративного університету, а також результати обґрунтування значущості досвіду функціонування відповідних інститутів для розвитку трудового потенціалу класичних за формою свого утворення вищих навчальних закладів. Наведено узагальнення щодо можливості використання традиційних для корпоративних університетів механізмів розвитку власного трудового потенціалу, у межах системи управління класичними вищими навчальними закладами в частині удосконалення змісту системи професійної підготовки суб’єктів та об’єктів навчально-виховного процесу

Role of the middle ear muscle apparatus in mechanisms of speech signal discrimination

A method of impedance reflexometry was used to examine 101 students with hearing impairment in order to clarify the interrelation between speech discrimination and the state of the middle ear muscles. Ability to discriminate speech signals depends to some extent on the functional state of intraaural muscles. Speech discrimination was greatly impaired in the absence of stapedial muscle acoustic reflex, in the presence of low thresholds of stimulation and in very small values of reflex amplitude increase. Discrimination was not impeded in positive AR, high values of relative thresholds and normal increase of reflex amplitude in response to speech signals with augmenting intensity

The extended Malkus-Robbins dynamo as a perturbed Lorenz system

Recent investigations of some self-exciting Faraday-disk homopolar dynamo ([1-4]) have yielded the classic Lorenz equations as a special limit when one of the principal bifurcation parameters is zero. In this paper we focus upon one of those models [3] and illustrate what happens to some of the lowest order unstable periodic orbits as this parameter is increased from zero

Spin-orbit lateral superlattices: energy bands and spin polarization in 2DEG

The Bloch spinors, energy spectrum and spin density in energy bands are studied for the two-dimensional electron gas (2DEG) with Rashba spin-orbit (SO) interaction subject to one-dimensional (1D) periodic electrostatic potential of a lateral superlattice. The space symmetry of the Bloch spinors with spin parity is studied. It is shown that the Bloch spinors at fixed quasimomentum describe the standing spin waves with the wavelength equal to the superlattice period. The spin projections in these states have the components both parallel and transverse to the 2DEG plane. The anticrossing of the energy dispersion curves due to the interplay between the SO and periodic terms is observed, leading to the spin flip. The relation between the spin parity and the interband optical selection rules is discussed, and the effect of magnetization of the SO superlattice in the presence of external electric field is predicted.Comment: 6 pages, 5 figures, reported at the International Conferences "Nanophysics and Nanoelectronics" (Nizhny Novgorod, Russia, March 2006) and "Nanostructures: Physics and Technology" (St Petersburg, Russia, June 2006

Novas abordagens para a avaliação da sustentabilidade económica das empresas de pesca

The importance and necessity of transition to the paradigm of sustainable development of Russian fishing enterprises is associated with the accumulation of many complex and unsolved problems. First of all, they concern the low susceptibility to innovation and the significant technological inferiority in comparison with the developed countries, as well as the lack of systematic implementation of a national industrial policy aimed at ensuring the sustainable development of the industry. The purpose of the study is to propose a methodology for assessing the economic sustainability of fishing enterprises on the basis of generalizing the achievements of economic theory and practice. To achieve the goal, methods of comparative multidimensional analysis, as well as dialectical and general scientific methods were used. The paper provides a critical assessment of common approaches to assessing the economic sustainability of the enterprise. The system of quantitative and qualitative indicators for assessing the economic sustainability of fishing organizations, which takes into account the strategic factors of enterprise development, has been proposed. The work provides an opportunity for an in-depth understanding of the problem of economic sustainability and its comprehensive solution. In particular, the proposed system of indicators can serve as a methodical tool to justify the effectiveness of government support measures because it allows ranking the fishing business structures according to their economic sustainability, and therefore, select government recipients of budgetary funds, preferential credit resources and other government measures. In conclusion, the definition of economic sustainability is clarified.La importancia y la necesidad de la transición al paradigma del desarrollo sostenible de las empresas pesqueras rusas está asociada a la acumulación de muchos problemas complejos y no resueltos. En primer lugar, se refieren a la baja susceptibilidad a la innovación y la significativa inferioridad tecnológica en comparación con los países desarrollados, así como a la falta de implementación sistemática de una política industrial nacional dirigida a garantizar el desarrollo sostenible de la industria. El propósito del estudio es proponer una metodología para evaluar la sostenibilidad económica de las empresas pesqueras sobre la base de generalizar los logros de la teoría y la práctica económica. Para lograr el objetivo, se utilizaron métodos de análisis multidimensional comparativo, así como métodos dialécticos y científicos generales. El documento proporciona una evaluación crítica de los enfoques comunes para evaluar la sostenibilidad económica de la empresa. Se ha propuesto el sistema de indicadores cuantitativos y cualitativos para evaluar la sostenibilidad económica de las organizaciones pesqueras, que tiene en cuenta los factores estratégicos del desarrollo empresarial. El trabajo brinda la oportunidad de comprender en profundidad el problema de la sostenibilidad económica y su solución integral. En particular, el sistema de indicadores propuesto puede servir como una herramienta metódica para justificar la efectividad de las medidas de apoyo del gobierno porque permite clasificar las estructuras de las empresas pesqueras de acuerdo con su sostenibilidad económica y, por lo tanto, seleccionar a los receptores gubernamentales de fondos presupuestarios, recursos crediticios preferenciales y Otras medidas gubernamentales. En conclusión, se aclara la definición de sostenibilidad económica.A importância e necessidade da transição para o paradigma do desenvolvimento sustentável das empresas de pesca russas está associada à acumulação de muitos problemas complexos e não resolvidos. Em primeiro lugar, dizem respeito à baixa suscetibilidade à inovação e à significativa inferioridade tecnológica em comparação com os países desenvolvidos, bem como à falta de implementação sistemática de uma política industrial nacional que vise garantir o desenvolvimento sustentável da indústria. O objetivo do estudo é propor uma metodologia para avaliar a sustentabilidade econômica das empresas pesqueiras com base na generalização das conquistas da teoria e prática econômica. Para atingir o objetivo, métodos de análise comparativa multidimensional, bem como métodos científicos dialéticos e gerais foram utilizados. O documento fornece uma avaliação crítica de abordagens comuns para avaliar a sustentabilidade econômica da empresa. O sistema de indicadores quantitativos e qualitativos para avaliar a sustentabilidade econômica das organizações pesqueiras, que leva em conta os fatores estratégicos de desenvolvimento empresarial, foi proposto. O trabalho oferece uma oportunidade para uma compreensão profunda do problema da sustentabilidade econômica e de sua solução abrangente. Em particular, o sistema proposto de indicadores pode servir como uma ferramenta metódica para justificar a eficácia das medidas de apoio do governo, pois permite classificar as estruturas do negócio pesqueiro de acordo com sua sustentabilidade econômica e, portanto, selecionar beneficiários governamentais de recursos orçamentários, recursos de crédito preferencial e outras medidas governamentais. Em conclusão, a definição de sustentabilidade econômica é esclarecida

Efimov effect from functional renormalization

We apply a field-theoretic functional renormalization group technique to the few-body (vacuum) physics of non-relativistic atoms near a Feshbach resonance. Three systems are considered: one-component bosons with U(1) symmetry, two-component fermions with U(1)\times SU(2) symmetry and three-component fermions with U(1) \times SU(3) symmetry. We focus on the scale invariant unitarity limit for infinite scattering length. The exact solution for the two-body sector is consistent with the unitary fixed point behavior for all considered systems. Nevertheless, the numerical three-body solution in the s-wave sector develops a limit cycle scaling in case of U(1) bosons and SU(3) fermions. The Efimov parameter for the one-component bosons and the three-component fermions is found to be approximately s=1.006, consistent with the result of Efimov.Comment: 21 pages, 6 figures, minor changes, published versio

Persistent currents in multicomponent Tomonaga-Luttinger liquid: application to mesoscopic semiconductor ring with spin-orbit interaction

We study persistent currents in semiconductor ballistic rings with spin-orbit Rashba interaction. We use as a working model the multicomponent Tomonaga-Luttinger liquid which arises due to the nonparabolic dispersion relations of electrons in the rings with rather strong spin-orbit coupling. This approach predicts some new characteristic features of persistent currents, which may be observed in experimental studies of semiconductor ballistic rings.Comment: 13 pages, 8 figure