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Search Results: 1 - 10 of 210968 matches for " Anna N. Shabarina "
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Loop Structures and Barrier Elements from D. melanogaster 87А7 Heat Shock Locus  [PDF]
Mikhail V. Glazkov, Anna N. Shabarina
Computational Molecular Bioscience (CMB) , 2016, DOI: 10.4236/cmb.2016.64005
Abstract: The three-dimensional organization of the genome is closely related to its functioning. Interactions between parts of the genome located at large distances from each other have been detected within the chromosomes of different organisms, which led to the discovery of topologically associated domains (TADs). Methods that reveal such interactions between chromosomal loci imply detection of both protein-protein and protein-DNA interactions. We investigated the possibility of involvement of the direct DNA-DNA interactions in the structural and functional organization of Drosophila melanogaster chromosomal 87A7 locus, containing genes hsp70Aa and hsp70Ab, with the sequence analysis method. Our results indicate that the functional organization of 87A7 locus may involve different elements: chromosomal DNA fragments that attach chromosomes to the nuclear envelope, short polypurine/polypyrimidine tracts, insulators and their proteins. The combination of interactions of these elements may cause different functional states of 87A7 locus.
On Linear Coding Schemes for Stabilizing LTI Control with Multiple Sensors
Anna N. Kim
International Journal of Distributed Sensor Networks , 2010, DOI: 10.1155/2010/514521
Abstract: We examine the problem of designing the encoding and control policies of a linear stochastic control system, where the communication channel between the plant state observer (sensor) and the controller is a lossy wireless channel that is constrained in terms of transmit power and bandwidth. For a first-order ARMA modeled plant with Gaussian statistics, when there are two sensors observing the plant, nonlinear encoding is shown to result in smaller cost at time instant compared to the linear schemes, if transmissions are carried out over parallel Gaussian independent channels. In this paper, optimal linear coding schemes for the case of multiple sensors are examined. They are shown to minimize the control cost at the infinite time horizon, when the wireless channel is accessed using time division multiplexing. Our analysis is carried out for when separation between the state estimation and control is possible, and the optimal steady state control law is certainty equivalent. The distortion lower bound for estimating the plant state is derived, along with the necessary conditions on the transmit power that minimize the steady state control cost. We also propose a linear scheme that reaches the distortion bound asymptotically under relaxed conditions. 1. Introduction Wireless sensors and communication have become an integral part of closed-loop control systems in the recent years. Consider for example, the following simple control application. We wish to regulate the temperature of a room. Multiple sensor nodes are placed at different locations in the room for taking temperature measurements. The measurements are then sent to the controller, which utilizes the sensor observations when issuing new control commands to the heating or cooling elements. Naturally, benefits such as flexible placement, reduced costs on installation, and easier maintenance can be expected if sensor nodes communicate to the controller via wireless channels. This, however, also means that the sensor nodes are now sharing the communication medium, which is lossy and in general also restricted in terms of bandwidth and power. Such information constraints make the networked control systems differ from the classic wired setting. As pointed out in [1], designing the optimal communication and control policies in this case is no simple task, since the changes in one directly influence the outcome of the other. The controller may have to tolerate large errors and/or delays in sensor observations, while the sensors may have to encode and transmit their measurements subject to strict
El vínculo migración y desarrollo en el marco de la política pública espa?ola
Sanmartín Ortí, Anna;
Migración y desarrollo , 2009,
Abstract: the multiple interactions between migration and development have not been sufficiently explored in the current literature. the idea that migration can foster and encourage development in the regions that produce it greatly depends on the context and the political approach of the governments in question. this article examines the case of spain through an analysis of public management documents and discourse, as well as the ways in which contextual elements and concepts of immigration come together in a political attempt to establish intervention mechanisms that can assist and encourage a beneficial relationship. among them is the specifically european approach of co-development, which is currently implemented in spain by actors in the fields of cooperation and migration.
Impact of ferroelectric nonlinearity and correlation effects on nanodomain formation
Anna N. Morozovska
Physics , 2010,
Abstract: Using direct variational method with 2-parametric trial function and Landau-Ginzburg-Devonshire thermodynamical approach, we derived analytical expressions for polarization spatial redistribution in the ferroelectrics caused by the biased Scanning Probe Microscope probe. We demonstrate that the shape of nanodomain induced by the probe electric field can be either oblate or prolate depending on the ferroelectric nonlinearity strength. For typical ferroelectric material parameters and probe apex geometry the domain nucleus aspect ratio is close to dielectric anisotropy factor. Corresponding coercive biases of a stable domain formation are in reasonable agreement with available experimental results. Spike-like domains typical for Landauer-Molotskii rigid approach appear in the considered case only when depolarization field energy contribution strongly dominates over the nonlinear correlation and field effects and domain wall energy.
Features of the formation and nanostructure of the film with the basic hexagonal phase TiN0.3 by arc evaporation  [PDF]
Anna L. Kameneva, L'ybov N. Guselnikova, Tatyana O. Soshina
Journal of Biophysical Chemistry (JBPC) , 2011, DOI: 10.4236/jbpc.2011.21004
Abstract: Forming and nanostructuring processes of TiN film by electric arc evaporation under the conditions of the reactive nitrogen gas deficit in the gas mixture (30%) have been investigated. The results of a technological experiment, electron microscopic examination, X-ray diffraction phase analysis and mechanical testing of the film revealed that a significant increase in ion density and mobility leads to deterioration of the formation temperature conditions, structural and phase changes in TiN film and change of the main cubic phase (111)TiN on a hexagonal (101)TiN0.3. In the end repeated decrease of the the film microhardness with (101)TiN0.3 was caused not only by erosion of the film, but also because of change in the processes of its formation and nanostructuring in comparison with similar processes of the film with (111)TiN.
Attitude to cervical cancer screening and sexual behaviour among HPV vaccinated young women—A qualitative pilot study  [PDF]
Marie G. Oscarsson, Anna Qvarnstr?m, Tanja Tydén
Health (Health) , 2013, DOI: 10.4236/health.2013.57A4002
Abstract:

Objectives: To explore attitudes to cervical cancer screening and sexual behaviour among human papillomavirus (HPV)-vaccinated young women in southern Sweden. Methods: Sixteen women aged 17-26 years who had received the HPV vaccine were submitted to an individual semi-structured interview. Interviews were recorded and transcribed verbatim. The data were analysed qualitatively by means of latent content analysis. Results: The interviewees had a poor understanding of cervical cancer screening. After it was explained to them, they stated that they were willing to participate in the screening. The young women thought their future sexual behaviour would not be affected by the vaccination. They considered themselves to be more aware of it and less likely to engage in risky behaviour than their peers. They knew little about the relation among HPV, sexual transmission and cervical cancer, and they expressed a desire for more information. Conclusions: These young women who recently had been administered HPV vaccine had a limited understanding of the importance of participating in future cervical cancer screening. It is necessary that more and more appropriate information of cervical cancer screening be given on the occasion of the HPV vaccination.

Verotoxigenic Escherichia coli O157:H7 from Swedish cattle; isolates from prevalence studies versus strains linked to human infections - A retrospective study
Anna Aspán, Erik Eriksson
BMC Veterinary Research , 2010, DOI: 10.1186/1746-6148-6-7
Abstract: Characterization by phage typing and molecular methods of the strains isolated from these 18 farms, including PCR for virulence genes (vtx1, vtx2 and variants thereof, eaeA and EHEC-hlyA) and Pulsed-Field Gel Electrophoresis (PFGE), demonstrated a cluster of very similar strains from 16 farms. All were of phage type 4, carried the genes encoding the verotoxins VT2 and VT2c, intimin, EHEC-haemolysin and flagellin H7 as shown by PCR, and had identical or very similar PFGE patterns. When analysing strains in a prevalence study of VTEC O157:H7 from cattle at slaughter as well as from an on-farm prevalence study of dairy cattle, using the same typing methods, a rather wide variation was observed among the isolated VTEC O157:H7 strains.In Sweden, a limited group of genetically similar and highly pathogenic VTEC O157:H7 strains seem to predominate in direct or indirect transmission from cattle to man.Verotoxin-producing Escherichia coli (VTEC) O157:H7 was first recognized as a human pathogen in 1982 [1]. As it was associated with consumption of undercooked 'hamburgers', it became known as 'the hamburger bug'. As it has subsequently been found that healthy cattle can harbour the bacterium, ruminants are now regarded as its main reservoir, though VTEC O157:H7 has been isolated from other animal species such as sheep, pigs, geese, gulls and pet animals [2]. Especially undercooked meat of bovine origin but also unpasteurized milk and other dairy products have been implicated in transmitting VTEC O157:H7 to humans. Another route for acquiring the infection is direct transmission from cattle, especially calves, for instance on 'open farms' where groups of children are welcome to visit. As the bacterium survives well in the environment, drinking water, vegetables irrigated with contaminated water, and public outdoor swimming pools have been mentioned as sources of community outbreaks. Direct person-to-person transmission also occurs, as the infectious dose of the bacterium is ver
The Immigration Debate in the EU: the General Context
Anna Terrón i Cusí
Revista CIDOB d'Afers Internacionals , 2001,
Abstract: This article sets out to review and assess the current status of European Union actions in the area of immigration. In doing so, we will first briefly examine the historical context— the Schengen Accords and the Maastricht and Amsterdam Treaties. We then go on todiscuss in more detail the agreements reached by the Council of the European Union at Tampere, which mark a major step in politically defining how the Union will handle this issue. We then look at what progress has been made thus far and what proposals are under discussion. There is also a discussion of the positions of various political groups, particularly those represented in the European Parliament, as well as the Spanish position and the repercussions of the European developments on the national debate.
Toward a shared urban transport system passengers & Goods Cohabitation Toward a shared urban transport system passengers & Goods Cohabitation
Anna Trentini,Nicolas Mahléné
TeMA : Journal of Land Use, Mobility and Environment , 2011, DOI: 10.6092/1970-9870/503
Abstract: The paper presents radical new urban transportation system concepts, potentially allowing changing the economic and environmental costs of passenger and freight transportation. The driver focuses on the concept of sharing, which means to make a joint use of transport resources, between passengers and goods flows. From a field observation of several existing solutions, an inductive reasoning enables us to move from a set of specific facts to establish an archetype for a radical new urban transportation system. Once the archetype defined, it is translated in real life through the example of the On Route proposal for London. The research frame of this paper is the ANR ( French National Research Agency) C-Goods (City Goods Operation Optimization using Decision support System) project. Started in February 2009 the project involves four partners, (The multi-disciplinary French engineer school EIGSI (Ecole d’Ingénieurs en Génie des Systèmes Industriels), the French university ENMP (Ecole Nationale Supérieure des Mines de Paris), the Poitiers Urban Community (CAP), and the consulting service Interface Transport, specialized in transport economy) and will end on 2012. The paper presents radical new urban transportation system concepts, potentially allowing changing the economic and environmental costs of passenger and freight transportation. The driver focuses on the concept of sharing, which means to make a joint use of transport resources, between passengers and goods flows. From a field observation of several existing solutions, an inductive reasoning enables us to move from a set of specific facts to establish an archetype for a radical new urban transportation system. Once the archetype defined, it is translated in real life through the example of the On Route proposal for London. The research frame of this paper is the ANR ( French National Research Agency) C-Goods (City Goods Operation Optimization using Decision support System) project. Started in February 2009 the project involves four partners, (The multi-disciplinary French engineer school EIGSI (Ecole d’Ingénieurs en Génie des Systèmes Industriels), the French university ENMP (Ecole Nationale Supérieure des Mines de Paris), the Poitiers Urban Community (CAP), and the consulting service Interface Transport, specialized in transport economy) and will end on 2012.
Toward a Shared Urban Transport System Ensuring Passengers & Goods Cohabitation Toward a Shared Urban Transport System Ensuring Passengers & Goods Cohabitation
Anna Trentini,Nicolas Mahléné
TeMA : Journal of Land Use, Mobility and Environment , 2010, DOI: 10.6092/1970-9870/165
Abstract: The paper presents radical new urban transportation system concepts, potentially allowing changing the economic and environmental costs of passenger and freight transportation. The driver focuses on the concept of sharing, which means to make a joint use of transport resources, between passengers and goods flows. From a field observation of several existing solutions, an inductive reasoning enables us to move from a set of specific facts to establish an archetype for a radical new urban transportation system. Once the archetype defined, it is translated in real life through the example of the On Route proposal for London. The research frame of this paper is the ANR C-Goods (City Goods Operation Optimization using Decision support System) project. Started in February 2009 the project involves four partners , and will end on 2011. The paper presents radical new urban transportation system concepts, potentially allowing changing the economic and environmental costs of passenger and freight transportation. The driver focuses on the concept of sharing, which means to make a joint use of transport resources, between passengers and goods flows. From a field observation of several existing solutions, an inductive reasoning enables us to move from a set of specific facts to establish an archetype for a radical new urban transportation system. Once the archetype defined, it is translated in real life through the example of the On Route proposal for London. The research frame of this paper is the ANR C-Goods (City Goods Operation Optimization using Decision support System) project. Started in February 2009 the project involves four partners , and will end on 2011.
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