808 research outputs found
On an inverse scattering problem for a class of Dirac operators with spectral parameter in the boundary condition
No full textAbstractIn this work, we consider the inverse scattering problem for a class of one dimensional Dirac operators on the semi-infinite interval with the boundary condition depending polynomially on a spectral parameter. The scattering data of the given problem is defined and its properties are examined. The main equation is derived, its solvability is proved and it is shown that the potential is uniquely recovered in terms of the scattering data. A generalization of the Marchenko method is given for a class of Dirac operator
On an inverse scattering problem for a class Dirac operator with discontinuous coefficient and nonlinear dependence on the spectral parameter in the boundary condition
No full textOn the positive semi-infinite interval, we obtained a generalization of the Marchenko method for a Dirac equation system with a discontinuous coefficient and a quadratic polynomial on a spectral parameter in the boundary condition. In this connection, we use an new integral representation of the Jost solution of equation systems, which does not have a triangular form. The scattering function of the problem is defined, and its properties are examined. The Marchenko-type main equation is obtained, and it is shown that the potential is uniquely recovered in terms the scattering function
Sobolev inequality with non-uniformly degenerating gradient
Get PDFIn this paper we prove a weighted Sobolev inequality in a bounded domain Ω ⊂ R^n, n ≥ 1, of a homogeneous space (R^n,ρ,wdx), under suitable compatibility conditions on the positive weight functions (v, w, ω1, ω2, . . . , ωn) and on the quasi-metric ρ
Ensuring the information and communication security of media environment: problems and prospects
No full textМамедов Руслан Нураддин оглы — соискатель, Институт государственной службы и управления персоналом (ИГ СУ) Российской академии народного хозяйства и государственной службы при Президенте РФ (РАНХиГС), г. Москва, пр. Вернадского, 82, стр. 1; начальник Управления делами губернатора и правительства Московской области. Адрес: 143407, г. Красногорск, бульвар Строителей, д. 1. E-mail: 9248477@
gmail.com. R. N. Mamedov, Deputy Head of the Department of the Governor and the Government of the Moscow Region, Krasnogorsk, Russian Federation, [email protected]Автор рассматривает проблемы информационно-коммуникационной безопасности современной медиасреды с целью разработки защитных механизмов от опасностей информационной среды. Выявлена взаимосвязь между обладанием современной информационной культурой и наличием защищенности от опасностей информационно-коммуникационной среды. Автор
предлагает концептуальную модель социально-информационной безопасности и формирование системы медиаобразования. The author considers the problem of information and communication security of modern media environment.
The main purpose of the article — the creation of of protective mechanisms against the dangers of information and communication environment. The author defines the term «social and information security» as a defense of social actors from negative information influence. This observation is confirmed by the data of sociological research. The author has developed a conceptual model of social
security and offers the Organization of systematic media education for all age groups
On Boundedness of Weighted Hardy Operator in Lp(⋅) and Regularity Condition
Get PDFWe give a new proof for power-type weighted Hardy inequality in the norms of generalized Lebesgue spaces L-p(.) (R-n). Assuming the logarithmic conditions of regularity in a neighborhood of zero and at infinity for the exponents p(x) <= = q(x), <= q(x), necessary and sufficient conditions are proved for the boundedness of the Hardy operator Hf(x) = integral(vertical bar y vertical barINTAS Grant for the South-Caucasian Republics [8792]F. I. Mamedov was supported partially by the INTAS Grant for the South-Caucasian Republics, no. 8792
The two divergent PEP-carboxylase catalytic subunits in the green microalga Chlamydomonas reinhardtii respond reversibly to inorganic-N supply and co-exist in the high-molecular-mass, hetero-oligomeric Class-2 PEPC complex
No full textAbstractOur recent molecular studies revealed two divergent PEP-carboxylase (PEPC [Ppc]) encoding genes in the green microalga Chlamydomonas reinhardtii, CrPpc1 and CrPpc2, which are coordinately responsive to changes in inorganic-N and -C supply at the transcript level [Mamedov, T.G., Moellering, E.R. and Chollet, R. (2005) Identification and expression analysis of two inorganic C- and N-responsive genes encoding novel and distinct molecular forms of eukaryotic phosphoenolpyruvate carboxylase in the green microalga C. reinhardtii, Plant J. 42, 832–843]. Here, we report the distribution of these two encoded catalytic subunits in the minor Class-1 and predominant Class-2 PEPC enzyme-forms, the latter of which is a novel high-molecular-mass, hetero-oligomeric complex containing both CrPpc1 (p109) and CrPpc2 (p131) polypeptides. The Class-1 enzyme, however, is a typical PEPC homotetramer comprised solely of p109. We also document that the amount of both CrPpc1/2 catalytic subunits is up-/down-regulated by varying levels of NH4+ supplied to the culture medium
Optically addressable, integrative composite polymer microcapsules
No full textPhDThe development of remotely addressable tools to encapsulate, store and deliver active materials to
living cells is a particularly challenging topic of material science. As drug delivery agents,
microcontainers not only require high mechanical stability or to be delivered at target cells, but they
should also possess efficient remotely addressable release mechanisms. Light responsive polyelectrolyte
capsules are well suited for such purposes. Capsules are constructed using the Layer‐by‐Layer technique
where oppositely charged polymers are alternatively deposited on a sacrificial template. The interest for
such microcapsules lays in their versatile composition and stimuli‐responsive properties, which can be
altered to suit specific needs.
The primary aim of this work was to develop polymeric capsules with efficient optically addressable
release mechanisms. Previous work on this topic revealed severe flaws in biological environments,
especially with regards to the high energy requirements necessary for laser‐induced release and in the
very limited knowledge of the fate of microcapsules in living cells. These issues were addressed by
developing alternative types of light‐responsive capsules and gaining better understanding of existing
ones. Three types of materials were used to sensitize microcapsules to the near‐UV, visible and near‐IR
spectral regions: (1) azobenzene‐substituted polymers, (2) gold nanoparticles and (3) photocatalytic
porphyrinoid dyes. Various methods were used for the characterization of microcapsules, including laser
scanning confocal microscopy, colloidal probe and standard atomic force microscopy, electron
microscopy, fluorescence spectrophotometry, UV‐visible spectroscopy and differential scanning
calorimetry. Shells were probed for their mechanical stability as well as encapsulation and release
behavior based on parameters such as: assembly strategies, shell deformability, permeability, thermal
response and response to laser irradiation.
This thesis begins with a brief introduction followed by an extensive literature review summarizing the
various topics relevant to the work. The materials and methods used in the investigations are catalogued
in Chapter 3 . Chapter 4 presents the destructive effects of pulsed UV lasing on polymeric microcapsules
and introduces azobenzene‐functionalized capsules with the ability to encapsulate macromolecules by
exposure to continuous wave UV light. Chapter 5 looks at the mechanical properties of capsules
functionalized with gold nanoparticles as well as their remote release capabilities under near‐IR
irradiation. While most of these studies were conducted ex vivo, Chapter 5 concludes with a summary of
studies performed in vitro, which demonstrates that it is not only possible to release substances in living
cells by light but that the latter also survive in the process. Finally, in Chapter 6, the assembly and light
induced destabilization of microcapsules containing porphyrinoid dyes is presented
THE TASKS OF IMPROVING THE MANAGEMENT SYSTEM OF PROGRAMMES AND PROJECTS IMPLEMENTATION IN MUNICIPAL ADMINISTRATIONS
Get PDFIn the article problems of control systems of municipal authorities are considered. Problems of improvement of control systems of processes of implementation of programs and projects of development of business in administrations of municipal educations are developed and proved. It is defined that development of the system of management of processes of implementation of programs and projects at the municipal level is necessary. The author noted that the possibility of high efficiency and effectiveness of system development and monitoring of execution of programs and projects of support of small business in municipal unit can be carried out by means of application of concepts of system of the balanced indicators, process and project management
THE TASKS OF IMPROVING THE MANAGEMENT SYSTEM OF PROGRAMMES AND PROJECTS IMPLEMENTATION IN MUNICIPAL ADMINISTRATIONS
Get PDFIn the article problems of control systems of municipal authorities are considered. Problems of improvement of control systems of processes of implementation of programs and projects of development of business in administrations of municipal educations are developed and proved. It is defined that development of the system of management of processes of implementation of programs and projects at the municipal level is necessary. The author noted that the possibility of high efficiency and effectiveness of system development and monitoring of execution of programs and projects of support of small business in municipal unit can be carried out by means of application of concepts of system of the balanced indicators, process and project management
ALTICORE: an initiative for coastal altimetry
No full textALTICORE (value-added ALTImetry for COastal REgions) is an international initiative whose main objective is to encourage the operational use of altimetry over coastal areas, by improving the quality and availability of coastal altimetry data. The ALTICORE proposal has recently been submitted for funding to the INTAS scheme (www.intas.be) by a consortium of partners from Italy, France, UK, Russia and Azerbaijan. ALTICORE is also meant as a contribution to the ongoing International Altimeter Service effort.
In this work we will describe the anticipated project stages, namely: 1) improvement of the most widely distributed, 1 Hz, data by analyzing the corrective terms and providing the best solutions, including those derived from appropriate local modelling; 2) development of a set of algorithms to automate quality control and gap-filling functions for the coastal regions; 3) development of testing strategies to ensure a thorough validation of the data.
The improved products will be delivered to ALTICORE users via Grid-compliant technology; this makes it easier to integrate the local data holdings, allows access from a range of services, e.g. directly into model assimilation or GIS systems and should therefore facilitate a widespread and complete assessment of the 1Hz data performance and limitations. We will also outline the design and implementation of the Grid-compliant system for efficient access to distributed archives of data; this consists of regional data centres, each having primary responsibility for regional archives, local corrections and quality control, and operating a set of web-services allowing access to the full functionality of data extraction.
We will conclude by discussing a follow-on phase of the project; this will investigate further improvements on the processing strategy, including the use of higher frequency (10 or 20 Hz) data. Phenomena happen at smaller spatial scales near the coast, so this approach is necessary to match the required resolution. The whole project will hopefully promote the 15-year sea surface height from altimetry to the rank of operational record for the coastal areas
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