688 research outputs found
THE BASIC VERSION OF THE CONTENT COMPOSITION AND FUNCTIONING OF THE UNITARY INFORMATION INFORMATIVE ECONOMIC FUND (U.IL.IV.E.F)
From on the functional content positions is elucidated a basic version of the composition and functioning of the unitary information informative economic fund (U.Il.Iv.E.F.) of the economic unitary (E.U.), are’nt elaborated the scheme of the correspondence and insertion of the management and information (functional, decisional, informative) units and the scheme of the orientations of the forming, interconnections and interactions of the information of the this fund.basic version, content composition, functioning, unitary information informative economic fund (U.Il.Iv.E.F.) of the economic unit (E.U.).
The Conception of the General Content of the Composition, Structure and Working of the Informative Components of the Economic Knowledge Base
Starting of the content aspect, on the systematic-informational positions, the general conceptional variant of the composition, structure and transformative relations of elements of the informative compartment of knowledge base (K.Bs.) of automatized banks of economic intelligent data (A.Bn.E.Ig.D.) arent to cleargeneral composition, structure, working, informative components, knowledge base
Detection of second-order nonlinear optical magnetization by mapping normalized Stokes parameters
A measurable magnetic (nonlocal) contribution to the second harmonic generation (SHG) of nonmagnetic materials is an intriguing issue related to chiral materials, such as biomolecules. Here we report the detection of an intensity-dependent optically induced magnetization of a chiral bacteriorhodopsin film under femtosecond pulse excitation (830 nm) and far from the material's resonance. The analysis of the pump intensity-dependent noncollinear SHG signal, by means of the polarization map of normalized Stokes parameters, allows one to improve the detection of the nonlinear optical magnetization M (2 omega) contribution to the SHG signal. (c) 2013 Optical Society of Americ
A Numerical Approach to Stability of Multiclass Queueing Networks
The Multi-class Queueing Network (McQN) arises as a natural multi-class
extension of the traditional (single-class) Jackson network. In a single-class
network subcriticality (i.e. subunitary nominal workload at every station)
entails stability, but this is no longer sufficient when jobs/customers of
different classes (i.e. with different service requirements and/or routing
scheme) visit the same server; therefore, analytical conditions for stability
of McQNs are lacking, in general. In this note we design a numerical
(simulation-based) method for determining the stability region of a McQN, in
terms of arrival rate(s). Our method exploits certain (stochastic) monotonicity
properties enjoyed by the associated Markovian queue-configuration process.
Stochastic monotonicity is a quite common feature of queueing models and can be
easily established in the single-class framework (Jackson networks); recently,
also for a wide class of McQNs, including first-come-first-serve (FCFS)
networks, monotonicity properties have been established. Here, we provide a
minimal set of conditions under which the method performs correctly.
Eventually, we illustrate the use of our numerical method by presenting a set
of numerical experiments, covering both single and multi-class networks
The role of trigger infections in reactive arthritis
Department of Internal
Medicine: Rheumatology and Nephrology, Nicolae Testemitanu State University of Medicine
and Pharmacy, Chisinau, Republic of Moldova, The 8th International Medical Congress for Students and Young Doctors, September 24-26, 2020Introduction. Reactive Arthritis(ReA) is an immune-mediated synovitis resulting from slow
bacterial infections and showing intra-articular persistence of viable nonculturable bacteria
and/or immunogenetic bacterial antigens synthesized by metabolically active bacteria residing
in the joint and/or elsewhere in the body.Reactive arthritis is known to be triggered by a
bacterial infection, particularly of the genitourinary (Chl. trachomatis, Neisseria gonorrhea,
Mycoplasma hominis, and Ureaplasma urealyticum) or GI tract (Salmonella enteritidis,
Shigella flexneri, and disenteriae, Yersinia enterocolitica, Campylobacter jejuni, Cl.difficile).
The incidence is about 2% to 4% after a urogenital infection mainly with chlamydia
trachomatis and varies from 0% to 15% after gastrointestinal infections with Salmonella,
Shigella, Campylobacter, or Yersinia.
Aim of the study. To identify the most common infections that lead to the reactive arthritis
and to highlight the pathogenetic mechanisms of action, which would help to improve the
treatment tactic.
Materials and methods. The relevant articles on the topic were taken from the databases
NCBI, PubMed, Medline,and ScienceDirect .
Results. Reactive arthritis is an immune-mediated syndrome triggered by a recent infection. It
is hypothesized that when the invasive bacteria reach the systemic circulation, T lymphocytes
are induced by bacterial fragments such as lipopolysaccharide and nucleic acids. These
activated cytotoxic-T cells then attack the synovium and other self-antigens through molecular
mimicry. This is supported by the evidence of Chlamydia trachomatis and C pneumoniae
ribosomal RNA transcripts, enteric bacterial DNA and bacterial degradation products in the
synovial tissue and fluid. It is believed that anti-bacterial cytokine response is also impaired in
reactive arthritis, resulting in the decreased elimination of the bacteria.
Conclusions. Current evidence supports the concept that reactive arthritis (ReA) is an
immune-mediated synovitis resulting from slow bacterial infections and showing intraarticular
persistence of viable, nonculturable bacteria and/or immunogenetic bacterial antigens
synthesized by metabolically active bacteria residing in the joint and/or elsewhere in the body.
The mechanisms that lead to the development of ReA are complex and basically involve an
interaction between an arthritogenic agent and a predisposed host. The way in which a host
accommodates to invasive facultative intracellular bacteria is the key to the development of
ReA. The details of the molecular pathways that explain the articular and extra-articular
manifestations of the disease are still under investigation
The Conception of the General Content of the Composition, Structure and Working of the Informative Components of the Economic Knowledge Base
Starting of the content aspect, on the systematic-informational positions, the general conceptional variant of the composition, structure and transformative relations of elements of the informative compartment of knowledge base (K.Bs.) of automatized banks of economic intelligent data (A.Bn.E.Ig.D.) arent to clea
Photoacoustic technique for the characterization of plasmonic properties of 2D periodic arrays of gold nanoholes
We apply photo-acoustic (PA) technique to examine plasmonic properties of 2D
periodic arrays of nanoholes etched in gold/chromium layer upon a glass substrate
Chiral near-field manipulation in Au-GaAs hybrid hexagonal nanowires
We demonstrate the control of enhanced chiral field distribution at the surface of hybrid metallo-dielectric nanostructures composed of self-assembled vertical hexagonal GaAs-based nanowires having three of the six sidewalls covered with Au. We show that weakly-guided modes of vertical GaAs nanowires can generate regions of high optical chirality that are further enhanced by the break of the symmetry introduced by the gold layer. Changing the angle of incidence of a linearly polarized plane wave it is possible to tailor and optimize the maps of the optical chirality in proximity of the gold plated walls. The low cost feasibility of the sample combined to the simple control by using linearly polarized light and the easy positioning of chiral molecules by functionalization of the gold plates make our proposed scheme very promising for enhanced enantioselective spectroscopy applications
Optimization of thermochromic VO2 based structures with tunable thermal emissivity
In this paper, we design and simulate VO2/metal multilayers to obtain a large tunability of the thermal emissivity of infrared (IR) filters in the typical mid wave IR window of many infrared cameras. The multilayer structure is optimized to realise a low emissivity filter at high temperatures useful for military purposes. The values of tunability found for VO2/metal multilayers are larger than the value for a single thick layer of VO2. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4739489
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