182 research outputs found
One dimensional strongly interacting Luttinger liquid of lattice spinless fermions
The spinless fermion model with hard core repulsive potential extended on a
few lattice sites is considered.The Luttinger liquid behaviour is studied for
the different values of a hard core radius. A critical exponent of the one
particle correlation function for arbitrary electron density and coupling
constant are obtained.Comment: 4 pages, 4 figures, Late
A Model of Strongly Correlated Electrons with Condensed Resonating-Valence-Bond Ground States
We propose a new exactly solvable model of strongly correlated electrons. The
model is based on a - model of the CuO plane with infinitely large
repulsive interactions on Cu-sites, and it contains additional
correlated-hopping, pair-hopping and charge-charge interactions of electrons.
For even numbers of electrons less than or equal to 2/3-filling, we construct
the exact ground states of the model, all of which have the same energy and
each of which is the unique ground state for a fixed electron number. It is
shown that these ground states are the resonating-valence-bond states which are
also regarded as condensed states in which all electrons are in a single
two-electron state. We also show that the ground states exhibit off-diagonal
long-range order.Comment: 17 pages, 1 figure, v2: minor changes, v3: minor changes and typos
correction
Recoil Studies in the Reaction of 12-C Ions with the Enriched Isotope 118-Sn
The recoil properties of the product nuclei from the interaction of 2.2
GeV/nucleon 12-C ions from Nuclotron of the Laboratory of High Energies (LHE),
Joint Institute for Nuclear Research (JINR) at Dubna with a 118-Sn target have
been studied using catcher foils. The experimental data were analyzed using the
mathematical formalism of the standard two-step vector model. The results for
12-C ions are compared with those for deuterons and protons. Three different
Los Alamos versions of the Quark-Gluon String Model (LAQGSM) were used for
comparison with our experimental data.Comment: 10 pages, 6 figures, submitted to Nucl. Phys.
Sanitary Protection of the Territories within the Frames of Sanitary-Epidemiological Welfare Provision
Demonstrated is the structural and functional interrelation between sanitary protection of the territories, epidemiological monitoring, and the state sanitary-epidemiological surveillance. Sanitary protection of the territories (SPT) of the Russian Federation is a separate focus area authorizing sanitary prophylactic (anti-epidemic) activities, with a self-sustained sub-goal. It combines individual roles appertained to epidemiological monitoring and to federal sanitary-epidemiological surveillance, only in reference to a particular item - emergency situation in the sphere of sanitary-epidemiological welfare of the population. Specificity of the SPT is a balance between functionality and capacity of the monitoring, surveillance and control. Legislative and regulatory legal acts, which concern sanitary protection of the territory, provide the means for defining its basic organizational principles: country-wide activities, self-sufficiency and self-support of the Rospotrebnadzor, three-level hierarchical system, and information exchange
Activities Undertaken toward Individuals Who Have Been in Contact with Ebola Fever Patient
Significant aspect in the provision of anti-epidemic readiness for Ebola fever importation into the Russian Federation is to determine the scope of measures to be undertaken toward individuals who have been in contact with index case. Analyzed have been the published data on the imported case records resultant in the secondary transmission of the disease; measures, performed in relation to contact persons in non-endemic countries; possible mechanisms of transmission; presence of virus in biological material from an infected individual; risk of exposure to virus onboard the aircraft. Based on the results of the analysis of publications, WHO, CDC and Rospotrebnadzor recommendations, with due consideration of the current regulations, put forward is an approximate procedure for individuals who have been in contact with EVD case onboard the plane, including transportation of persons, exposed to the increased risk of infection into a specialized hospital
Improvement of the Normative-Regulatory Framework Concerning Anti-Epidemic Procedures for Works with Infectious Disease Agents in Mobile Laboratories of Specialized Anti-Epidemic Teams (SAET)
Carried out is a range of investigations aimed at the improvement of the anti-epidemic procedures for works with infectious disease agents (herein biological safety provision) in mobile laboratories of specialized anti-epidemic teams (SAET). Evaluation of the operational experience of stationary and field laboratories, as well as comparative analysis of the national safety requirements for works with pathogenic biological agents and WHO international regulations in the sphere of biological safety provision in laboratories, has made it possible to outline common for all types of microbiological laboratories principles for biosafety provision. With due consideration of these principles formulated are the core requirements for the provision of biological safety of SAET activities. Based on the results of biorisk and biohazard assessment which have to do with innovative mobile laboratories, worked out is a system of anti-epidemic procedures aimed towards establishment of the conditions that offer as low as practically achievable level of risk for personnel of SAET mobile laboratories, for population and human environment too. These practices, designed for biological safety provision among the personnel of mobile laboratories (ML), have been played back in a number of standard operational procedures. With a view to establishing of the environment with acceptable level of biorisk for the personnel and population when ML are used for various purposes and in various contingencies (in full force, single unit or several modules), worked out are the algorithms of decision-making support as regards selection of modules and optional accessories. However, there is a need for emergency response plans and training programs for the personnel on the provision of biosafety in ML to ensure and maintain acceptable level of biorisk connected with ML functioning
Basic Principles of Construction of Mobile Truck-Mounted Laboratories for Indication and Identification of Infectious Disease Agents
The paper covers historical retrospective of mobile truck-mounted laboratory construction, used for diagnostics of infectious diseases in the Russian Federation, as well as information on analogous laboratories of foreign manufacture. From the standpoint of systemic approach and systemic-functional analysis, investigated has been experience of the Russian Research Anti-Plague Institute “ Microbe” in developing mobile complexes for indication and identification of infectious disease agents, I-IV pathogenicity groups. Outlined, scientifically substantiated and considered in depth are ten basic principles, underlying design and construction of mobile laboratories for laboratory diagnostics of infectious diseases
Usage of Mobile Laboratories of Biological Expertise Abroad and in Russia: Present Day Realities and Prospects
We analyzed the data on availability and usage of mobile laboratories of biological expertise for indication and identification of pathogenic biological agents in foreign countries and in the Russian Federation. We outlined the major types of mobile units that exist abroad and in Russia. Key stages of evolution in design and deployment of mobile laboratories in the network of plague control institutions of the Rospotrebnadzor were described, as well as the broadening of the range of their use in Russia. We assessed operational use of the Russian mobile laboratories, both in Russia and abroad, in the provision of sanitary-epidemiological welfare during mass events, disaster management, and response to epidemic manifestations of particularly dangerous infectious diseases. Major trends in implementation of mobile units of biological expertise in Russia were identified. We addressed their usage in various State Programs on assistance to partner-countries in the matters of International Health Regulations (2005) implementation, control over dangerous infectious diseases. Advanced inventions – Second generation modernized mobile complex of the specialized anti-epidemic teams, mobile laboratory for monitoring and diagnostics, and airmobile anti-epidemic complex – were discussed
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