351 research outputs found
Corporate education system as a factor of ensuring modern companiesâ financial stability
Purpose: This article aims to identify the role of corporate universities opened by large holdings for their employeesâ effective training as a part of the companyâs mission implementation and ensuring business financial stability strategy.
Design/Methodology/Approach: To implement flexible project management of the companiesâ financial stability, a concept of corporate university development is presented on the grounds of a competency-based approach. Main emphasis of the competency-based approach is aimed at the labor functions performance and establishment of a correlation between competence and labor efficiency of employees.
Findings: Methods and techniques of corporate education are aimed at creating human capital development optimal model, ensuring the companyâs financial stability.
Practical Implications: The study results were tested as part of a corporate retraining program for the specialists at the âRussian Railwaysâ company in Rostov-on-Don. Participation in corporate university programs allows employees responding quickly to market changes.
Originality/value: Main contribution of this study is to create an algorithm for transmitting the company's strategy to all management levels. The tools for key changes in the companyâs organizational and financial management system are formed at a corporate university.peer-reviewe
Self-Similarity and Universality in Rayleigh-Taylor, Boussinesq Turbulence
We report and discuss case study simulations of the Rayleigh-Taylor
instability in the Boussinesq, incompressible regime developed to turbulence.
Our main focus is on a statistical analysis of density and velocity
fluctuations inside of the already developed and growing in size mixing zone.
Novel observations reported in the manuscript concern self-similarity of the
velocity and density fluctuations spectra inside of the mixing zone snapshot,
independence of the spectra of the horizontal slice level, and universality
showing itself in a virtual independence of the internal structure of the
mixing zone, measured in the re-scaled spatial units, of the initial interface
perturbations.Comment: 10 pages, 11 figure
Mixing and reaction efficiency in closed domains
We present a numerical study of mixing and reaction efficiency in closed
domains. In particular we focus our attention on laminar flows. In the case of
inert transport the mixing properties of the flows strongly depend on the
details of the Lagrangian transport. We also study the reaction efficiency.
Starting with a little spot of product we compute the time needed to complete
the reaction in the container. We found that the reaction efficiency is not
strictly related to the mixing properties of the flow. In particular, reaction
acts as a "dynamical regulator".Comment: 11 pages, 10 figure
Flame Evolution During Type Ia Supernovae and the Deflagration Phase in the Gravitationally Confined Detonation Scenario
We develop an improved method for tracking the nuclear flame during the
deflagration phase of a Type Ia supernova, and apply it to study the variation
in outcomes expected from the gravitationally confined detonation (GCD)
paradigm. A simplified 3-stage burning model and a non-static ash state are
integrated with an artificially thickened advection-diffusion-reaction (ADR)
flame front in order to provide an accurate but highly efficient representation
of the energy release and electron capture in and after the unresolvable flame.
We demonstrate that both our ADR and energy release methods do not generate
significant acoustic noise, as has been a problem with previous ADR-based
schemes. We proceed to model aspects of the deflagration, particularly the role
of buoyancy of the hot ash, and find that our methods are reasonably
well-behaved with respect to numerical resolution. We show that if a detonation
occurs in material swept up by the material ejected by the first rising bubble
but gravitationally confined to the white dwarf (WD) surface (the GCD
paradigm), the density structure of the WD at detonation is systematically
correlated with the distance of the deflagration ignition point from the center
of the star. Coupled to a suitably stochastic ignition process, this
correlation may provide a plausible explanation for the variety of nickel
masses seen in Type Ia Supernovae.Comment: 14 pages, 10 figures, accepted to the Astrophysical Journa
Flame Enhancement and Quenching in Fluid Flows
We perform direct numerical simulations (DNS) of an advected scalar field
which diffuses and reacts according to a nonlinear reaction law. The objective
is to study how the bulk burning rate of the reaction is affected by an imposed
flow. In particular, we are interested in comparing the numerical results with
recently predicted analytical upper and lower bounds. We focus on reaction
enhancement and quenching phenomena for two classes of imposed model flows with
different geometries: periodic shear flow and cellular flow. We are primarily
interested in the fast advection regime. We find that the bulk burning rate v
in a shear flow satisfies v ~ a*U+b where U is the typical flow velocity and a
is a constant depending on the relationship between the oscillation length
scale of the flow and laminar front thickness. For cellular flow, we obtain v ~
U^{1/4}. We also study flame extinction (quenching) for an ignition-type
reaction law and compactly supported initial data for the scalar field. We find
that in a shear flow the flame of the size W can be typically quenched by a
flow with amplitude U ~ alpha*W. The constant alpha depends on the geometry of
the flow and tends to infinity if the flow profile has a plateau larger than a
critical size. In a cellular flow, we find that the advection strength required
for quenching is U ~ W^4 if the cell size is smaller than a critical value.Comment: 14 pages, 20 figures, revtex4, submitted to Combustion Theory and
Modellin
Simultaneous measurements of nuclear spin heat capacity, temperature and relaxation in GaAs microstructures
Heat capacity of the nuclear spin system (NSS) in GaAs-based microstructures
has been shown to be much greater than expected from dipolar coupling between
nuclei, thus limiting the efficiency of NSS cooling by adiabatic
demagnetization. It was suggested that quadrupole interaction induced by some
small residual strain could provide this additional reservoir for the heat
storage. We check and validate this hypothesis by combining nuclear spin
relaxation measurements with adiabatic remagnetization and nuclear magnetic
resonance experiments, using electron spin noise spectroscopy as a unique tool
for detection of nuclear magnetization. Our results confirm and quantify the
role of the quadrupole splitting in the heat storage within NSS and provide
additional insight into fundamental, but still actively debated relation
between a mechanical strain and the resulting electric field gradients in GaAs.Comment: 11 pages, 4 figures, 1 tabl
Middle Eastern Everyday Life in S.S. Kondurushkinâs Magazine Essays at Beginning of Twentieth Century
The problem of the presentation of the Middle Eastern everyday life in the early prose of S.S. Kondurushkin (1874â1919), an active participant in the literary and social life of Russia at the turn of the XIXâXX centuries is examined in the article. On the basis of the essay cycle âFrom Wanderings in Syriaâ and other works of the early 1900s, an analysis of the methods of recreating the Middle Eastern everyday life is presented. The narrative strategies that underlie the Middle Eastern narrative of the Russian traveler are studied. This makes it possible to clarify the characteristics of the genre of the travel sketch in the general context of Russian literature at the turn of the century, which determines the scientific novelty and relevance of the article. The authors examine in detail the essays âGreeks in Palestine and Syriaâ, âTerra incognitaâ, âLa Bayadereâ, âAkulina in Tripoliâ. The consistent change of the exposing discourse of political journal-ism to various forms of âethnographicâ narrative are substantiated in the article. The tasks set required the use of traditional methods of academic literary criticism, as well as techniques of cultural linguistics, imagology, imperial and colonial studies. A number of archival materials are introduced into scientific circulation, in particular, letters from N.K. Mikhailovsky addressed to S.S.Kondurushkin
Nanoscale investigation of polymer cement concretes by small angle neutron scattering
An analysis of dense cements, such as polymer cement concrete, is made to produce original innovative components for different types of constructing materials. These materials present good functional properties (ageing resistance, crack formation resistance, hardness, and stability of mechanical modules) and can be used for various applications. In this paper, experimental tests on Portland cement with added γ-Al 2 O 3 and redispersible dry polymer performed using small angle neutron scattering are reported. The objective of the investigation was to assess the key parameters of the material (e.g., porosity, fractal dimensions, and size distribution) at the nanoscale level as well as to obtain useful structural information for expanding the possibility of applications. The results obtained can contribute to the optimisation of the consistency of the material, the design of operating conditions of elements of structures and facilities, and the design of the procedures that support ecological criteria and enhance quality and safety levels. © 2017 Walter de Gruyter GmbH, Berlin/Boston
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