Methodological Aspects of Formation of Chart of Accounts

The study identified three types of charts of accounts: the chart of accounts oriented to financial accounting, which is based on the matrix method of building, classification of accounts is based on the principles of the balance sheet and the traditional definition of financial results; the chart of accounts, which assumes detailing the cost accounting and allocating additional classes of accounts to determine the financial results of the production; the chart of accounts of the integrated accounting, allowing the formation of multi-sector information and the data exchange between the accounted subsystemsyesBelgorod State Universit

On the modulation instability development in optical fiber systems

Extensive numerical simulations were performed to investigate all stages of modulation instability development from the initial pulse of pico-second duration in photonic crystal fiber: quasi-solitons and dispersive waves formation, their interaction stage and the further propagation. Comparison between 4 different NLS-like systems was made: the classical NLS equation, NLS system plus higher dispersion terms, NLS plus higher dispersion and self-steepening and also fully generalized NLS equation with Raman scattering taken into account. For the latter case a mechanism of energy transfer from smaller quasi-solitons to the bigger ones is proposed to explain the dramatical increase of rogue waves appearance frequency in comparison to the systems when the Raman scattering is not taken into account.Comment: 9 pages, 54 figure

Solitary wave interaction in a compact equation for deep-water gravity waves

In this study we compute numerical traveling wave solutions to a compact version of the Zakharov equation for unidirectional deep-water waves recently derived by Dyachenko & Zakharov (2011) Furthermore, by means of an accurate Fourier-type spectral scheme we find that solitary waves appear to collide elastically, suggesting the integrability of the Zakharov equation.Comment: 8 pages, 5 figures, 23 references. Other author's papers can be downloaded at http://www.lama.univ-savoie.fr/~dutykh/ . arXiv admin note: text overlap with arXiv:1204.288

Electronic structure and magnetic state of transuranium metals under pressure

Electronic structure of bcc Np, fcc Pu, Am, and Cm pure metals under pressure has been investigated employing the LDA+U method with spin-orbit coupling (LDA+U+SO). Magnetic state of the actinide ions was analyzed in both LS and jj coupling schemes to reveal the applicability of corresponding coupling bases. It was demonstrated that whereas Pu and Am are well described within the jj coupling scheme, Np and Cm can be described appropriately neither in {m-sigma}, nor in {jmj} basis, due to intermediate coupling scheme realizing in these metals that requires some finer treatment. The LDA+U+SO results for the considered transuranium metals reveal bands broadening and gradual 5f electron delocalization under pressure.Comment: 5 pages, 5 figure

Nonlinear interfacial waves in a constant-vorticity planar flow over variable depth

Exact Lagrangian in compact form is derived for planar internal waves in a two-fluid system with a relatively small density jump (the Boussinesq limit taking place in real oceanic conditions), in the presence of a background shear current of constant vorticity, and over arbitrary bottom profile. Long-wave asymptotic approximations of higher orders are derived from the exact Hamiltonian functional in a remarkably simple way, for two different parametrizations of the interface shape.Comment: revtex, 4.5 pages, minor corrections, summary added, accepted to JETP Letter

Freely decaying weak turbulence for sea surface gravity waves

We study numerically the generation of power laws in the framework of weak turbulence theory for surface gravity waves in deep water. Starting from a random wave field, we let the system evolve numerically according to the nonlinear Euler equations for gravity waves in infinitely deep water. In agreement with the theory of Zakharov and Filonenko, we find the formation of a power spectrum characterized by a power law of the form of $|{\bf k}|^{-2.5}$.Comment: 4 pages, 3 figure

Software Tools for Searching, Comparing and Suggesting Objects of the Computer-Aided Design System for Spacecraft Onboard Software

Сложность процесса проектирования бортового программного обеспечения космического аппарата обусловлена наличием в его составе до 500 000 программных и информационных объектов более чем 40 различных типов. Поэтому работа с такими большими объемами данных требует разработки специализированного программного обеспечения для инженеров-проектировщиков. Целью исследования является построение алгоритмов, разработка методов, создание математических моделей поиска, сравнения и копирования больших разнородных связанных данных, а также реализация полученных научно-практических результатов в программном комплексе инженера-проектировщика бортового программного обеспечения космических аппаратов. В результате выпоенных работ разработаны математические модели операций сравнения в терминах множеств и логики предикатов, определены критерии оценки результатов сравнения. На основе математических моделей разработаны программные компоненты, обеспечивающие поиск, сравнение и копирование частей или полностью архитектурного проекта бортового программного обеспечения космических аппаратов. Разработанные программные компоненты интегрированы в программный комплекс автоматизированного проектирования и сопровождения бортового программного обеспечения космических аппаратов. Результаты работы внедрены в АО «Информационные спутниковые системы им. ак. М. Ф. Решетнева» и практически используются в задачах проектирования новых спутников однотипных серий. Сложность работы с разнородными большими данными не позволила в полной мере реализовать операцию копирования. В работе предложено ввести понятие двухфазной операции копирования, когда первая фаза выполняет копирование структуры бортового программного обеспечения, а вторая фаза – связь структуры с ресурсами космического аппаратаThe complexity of the process of designing the onboard software of a spacecraft is due to the presence of up to 500,000 software and information objects of more than 40 different types in its composition. Therefore, working with such large amounts of data requires the development of specialized software for design engineers. The construction of algorithms, the development of methods, the creation of mathematical models for searching, comparing and copying large heterogeneous related data, as well as the implementation of the obtained scientific and practical results in the software package of the design engineer of the onboard software of spacecraft. Results: mathematical models of comparison operations are developed in terms of sets and logic of predicates, criteria for evaluating comparison results are determined. On the basis of mathematical models, software components have been developed that provide search, comparison and copying of parts or a complete architectural project of the spacecraft onboard software. The developed software components are integrated into the software package for computer-aided design and maintenance of the spacecraft onboard software. Practical relevance: the results of the work are implemented in JSC “Information satellite systems named after academician M. F. Reshetnev” and are practically used in the design of new satellites of the same type series. The complexity of working with heterogeneous big data did not allow to fully implement the copy operation. The paper proposes to introduce the concept of a two-phase copying operation, when the first phase copies the structure of the onboard software, and the second phase links the structure with the resources of the spacecraf

The anti-sigma factor RsrA responds to oxidative stress by reburying its hydrophobic core

Redox-regulated effector systems that counteract oxidative stress are essential for all forms of life. Here we uncover a new paradigm for sensing oxidative stress centred on the hydrophobic core of a sensor protein. RsrA is an archetypal zinc-binding anti-sigma factor that responds to disulfide stress in the cytoplasm of Actinobacteria. We show that RsrA utilizes its hydrophobic core to bind the sigma factor σ R preventing its association with RNA polymerase, and that zinc plays a central role in maintaining this high-affinity complex. Oxidation of RsrA is limited by the rate of zinc release, which weakens the RsrA-σ R complex by accelerating its dissociation. The subsequent trigger disulfide, formed between specific combinations of RsrA's three zinc-binding cysteines, precipitates structural collapse to a compact state where all σ R-binding residues are sequestered back into its hydrophobic core, releasing σ R to activate transcription of anti-oxidant genes

Transfer of energy to high frequencies in the cubic defocusing nonlinear Schrodinger equation

We consider the cubic defocusing nonlinear Schrödinger equation on the two dimensional torus. We exhibit smooth solutions for which the support of the conserved energy moves to higher Fourier modes. This behavior is quantified by the growth of higher Sobolev norms: given any δ[much less-than]1,K [much greater-than] 1, s > 1, we construct smooth initial data u 0 with ||u0||Hs , so that the corresponding time evolution u satisfies u(T)Hs[greater than]K at some time T. This growth occurs despite the Hamiltonian’s bound on ||u(t)||H1 and despite the conservation of the quantity ||u(t)||L2. The proof contains two arguments which may be of interest beyond the particular result described above. The first is a construction of the solution’s frequency support that simplifies the system of ODE’s describing each Fourier mode’s evolution. The second is a construction of solutions to these simpler systems of ODE’s which begin near one invariant manifold and ricochet from arbitrarily small neighborhoods of an arbitrarily large number of other invariant manifolds. The techniques used here are related to but are distinct from those traditionally used to prove Arnold Diffusion in perturbations of Hamiltonian systems