Social portrait of a police officer today

Objective: to study the social portrait of a police officer at the present stage, their attitude to work (promotion, labor intensity, psychological atmosphere), family, marriage, financial status, recreation, and retirement.Methods: dialectic approach to cognition of social phenomena allowing to analyze them in their historical development and functioning in the context of a set of objective and subjective factors, which determined the choice of the following research methods: formal-logical, comparative-legal, sociological.Results: the paper analyzes the social profile of police officers, their views on the future, family, and career. Special attention is paid to the problems of police officers in the service and at home - bureaucracy in the workplace, financial difficulties, situation with housing, attitude to family and marriage. The positive and negative coefficients of police officers’ agreement with the proposed questions are analyzed. The questions with maximum coefficient of agreement were: a) the monetary allowance of employees is the main means of their material provision; b) the life and health of a police officer is insured at the expense of budgetary funds; c) family members of a police officer are proud of their profession. The questions with maximum coefficient of disagreement included the following: a) neighbors are alert when communicating with family members of a police officer; b) I am completely satisfied with the amount of bonuses to the official salary for performing complex tasks; c) a police officer is forced to be friends only with other police officers.Scientific novelty: the paper concludes that currently employees of internal affairs agencies perceive stability and confidence in their position. As positive aspects of their work, the police officers note the high level of professionalism of the team, long vacation, and early retirement. However, there are a number of problems that need to be addressed. These include an excessive amount of paperwork, high stress levels, and financial problems.Practical significance: the main provisions and conclusions of the article can be used in scientific, educational and law enforcement activities when considering issues related to guarantees of social protection of police officers: remuneration, mandatory state insurance, provision of housing for police officers, medical care and other guarantees

Towards the electron EDM search: Theoretical study of HfF+

We report first ab initio relativistic correlation calculations of potential curves for ten low-lying electronic states, effective electric field on the electron and hyperfine constants for the ^3\Delta_1 state of cation of a heavy transition metal fluoride, HfF^+, that is suggested to be used as the working state in experiments to search for the electric dipole moment of the electron. It is shown that HfF^+ has deeply bound ^1\Sigma^+ ground state, its dissociation energy is D_e=6.4 eV. The ^3\Delta_1 state is obtained to be the relatively long-lived first excited state lying about 0.2 eV higher. The calculated effective electric field E_eff=W_d|\Omega| acting on an electron in this state is 5.84*10^{24}Hz/(e*cm)Comment: 4 page

Towards the electron EDM search. Theoretical study of PbF

We report ab initio relativistic correlation calculations of potential curves and spectroscopic constants for four lowest-lying electronic states of the lead monofluoride. We also calculated parameters of the spin-rotational Hamiltonian for the ground and the first excited states including P,T-odd and P-odd terms. In particular, we have obtained hyperfine constants of the $^{207}$Pb nucleus. For the $^2\Pi_{1/2}$ state $A_\perp=-6859.6$ MHz, $A_\|=9726.9$ MHz and for the A$^2\Sigma^+_{1/2}$ $A_\perp=1720.8$ MHz, $A_\|=3073.3$ MHz. Our values of the ground state hyperfine constants are in good agreement with the previous theoretical studies. We discuss and explain seeming disagreement in the sign of the constant $A_\perp$ with the recent experimental data. The effective electric field on the electron $E_{eff}$, which is important for the planned experiment to search for the electric dipole moment of the electron, is found to be 3.3 * 10^{10} V/cm

On Nonperturbative Calculations in Quantum Electrodynamics

A new approach to nonperturbative calculations in quantum electrodynamics is proposed. The approach is based on a regular iteration scheme for solution of Schwinger-Dyson equations for generating functional of Green functions. The approach allows one to take into account the gauge invariance conditions (Ward identities) and to perform the renormalization program. The iteration scheme can be realized in two versions. The first one ("perturbative vacuum") corresponds to chain summation in the diagram language. In this version in four-dimensional theory the non-physical singularity (Landau pole) arises which leads to the triviality of the renormalized theory. The second version ("nonperturbative vacuum") corresponds to ladder summation and permits one to make non-perturbative calculations of physical quantities in spite of the triviality problem. For chiral-symmetrical leading approximation two terms of the expansion of the first-step vertex function over photon momentum are calculated. A formula for anomalous magnetic moment is obtained. A problem of dynamical chiral symmetry breaking (DCSB) is considered, the calculations are performed for renormalized theory in Minkowsky space. In the strong coupling region DCSB-solutions arise. For the renormalized theory a DCSB-solution is also possible in the weak coupling region but with a subsidiary condition on the value of $\alpha$.Comment: 31 pages, Plain LaTex, no figures. Journal version: some discussion and refs. are adde

Comparative Analysis of Peculiarities of Thinking of Urban and Rural Schoolchildren

The results of the comparative analysis of the peculiarities of thinking of urban and rural schoolchildren of primary and senior levels of education are presented. In order to identify differences in the levels of formation of individual characteristics of thinking linked, inter alia, with the characteristics of social, physical and physiological development of students in urban and rural schools, a number of works were studied on the comparison of functional indicators of hemodynamics, psycho-emotional stability, verbal and logical thinking and characteristics of educational and cognitive activity among urban and rural schoolchildren. The results of the interpretation of the data obtained during the experiment conducted by the authors (54 respondents, 27 rural and urban high school students) are presented. It is concluded that rural pupils are characterized by higher level of development of abilities and qualities of the personality, providing them successful performance of the main types of mathematical activity: low level of psychoemotional tension, qualitative analysis of visual and visually-spatial information, logical conclusions, generalization of information, interest in the correct solution of a problem, etc. In the future, it is expected to find out possible reasons for “lagging” of urban schoolchildren from rural ones in terms of individual indicators of formation of mathematical thinking operations

A Unifying Model of Genome Evolution Under Parsimony

We present a data structure called a history graph that offers a practical basis for the analysis of genome evolution. It conceptually simplifies the study of parsimonious evolutionary histories by representing both substitutions and double cut and join (DCJ) rearrangements in the presence of duplications. The problem of constructing parsimonious history graphs thus subsumes related maximum parsimony problems in the fields of phylogenetic reconstruction and genome rearrangement. We show that tractable functions can be used to define upper and lower bounds on the minimum number of substitutions and DCJ rearrangements needed to explain any history graph. These bounds become tight for a special type of unambiguous history graph called an ancestral variation graph (AVG), which constrains in its combinatorial structure the number of operations required. We finally demonstrate that for a given history graph $G$, a finite set of AVGs describe all parsimonious interpretations of $G$, and this set can be explored with a few sampling moves.Comment: 52 pages, 24 figure

Sampling and counting genome rearrangement scenarios

Even for moderate size inputs, there are a tremendous number of optimal rearrangement scenarios, regardless what the model is and which specific question is to be answered. Therefore giving one optimal solution might be misleading and cannot be used for statistical inferring. Statistically well funded methods are necessary to sample uniformly from the solution space and then a small number of samples are sufficient for statistical inferring

ИССЛЕДОВАНИЕ СОСТОЯНИЯ МЕТАЛЛА В ПРОЦЕССЕ РАДИАЛЬНО-СДВИГОВОЙ ПРОКАТКИ НА СТАНЕ СРВП-130

Radial-shear rolling is prominent in production of titanium alloys at «VSMPO-AVISMA» Open Society (V. Salda city) and has a number of advantages over other plastic metal working processes. In the present investigation on the basis of engineering design procedures, a complex of software has been developed for forming simulation and heat transfer in the metal volume,and with its help the rolling of VT-6 alloy bar of 155 mm in diameter has been studied. «ThermoRSR» program has been developed that allows us to visualize design data in «Mathcad» medium; rolling process simulation has been carried out by means of DEFORM-3D package; and the conditions of its application are shown. Prospective ways of rolled stock temperature and rolling torque measurement are considered.Радиально-сдвиговая прокатка (РСП) играет большую роль в производстве титановых сплавов в ОАО «ВСМПО-АВИСМА» (г. В. Салда), имея ряд преимуществ перед другими процессами обработки металлов давлением. В настоящем исследовании на базе инженерных методик расчета разработан комплекс программных средств для моделирования формоизменения и теплопередачи в объеме металла и с его помощью изучена прокатка прутка диаметром 155 мм из сплава ВТ-6. Разработана программа «ThermoRSR», позволяющая визуализировать расчетные данные в среде «Mathcad», проведено моделирование процесса прокатки с помощью пакета DEFORM-3D и показаны условия его применимости. Рассмотрены перспективные способы измерения температуры проката и крутящего момента на шпинделе прокатного стана

Multichromosomal median and halving problems under different genomic distances

<p>Abstract</p> <p>Background</p> <p>Genome median and genome halving are combinatorial optimization problems that aim at reconstructing ancestral genomes as well as the evolutionary events leading from the ancestor to extant species. Exploring complexity issues is a first step towards devising efficient algorithms. The complexity of the median problem for unichromosomal genomes (permutations) has been settled for both the breakpoint distance and the reversal distance. Although the multichromosomal case has often been assumed to be a simple generalization of the unichromosomal case, it is also a relaxation so that complexity in this context does not follow from existing results, and is open for all distances.</p> <p>Results</p> <p>We settle here the complexity of several genome median and halving problems, including a surprising polynomial result for the breakpoint median and guided halving problems in genomes with circular and linear chromosomes, showing that the multichromosomal problem is actually easier than the unichromosomal problem. Still other variants of these problems are NP-complete, including the DCJ double distance problem, previously mentioned as an open question. We list the remaining open problems.</p> <p>Conclusion</p> <p>This theoretical study clears up a wide swathe of the algorithmical study of genome rearrangements with multiple multichromosomal genomes.</p

Comparative Analysis of DNA Replication Timing Reveals Conserved Large-Scale Chromosomal Architecture

Recent evidence suggests that the timing of DNA replication is coordinated across megabase-scale domains in metazoan genomes, yet the importance of this aspect of genome organization is unclear. Here we show that replication timing is remarkably conserved between human and mouse, uncovering large regions that may have been governed by similar replication dynamics since these species have diverged. This conservation is both tissue-specific and independent of the genomic G+C content conservation. Moreover, we show that time of replication is globally conserved despite numerous large-scale genome rearrangements. We systematically identify rearrangement fusion points and demonstrate that replication time can be locally diverged at these loci. Conversely, rearrangements are shown to be correlated with early replication and physical chromosomal proximity. These results suggest that large chromosomal domains of coordinated replication are shuffled by evolution while conserving the large-scale nuclear architecture of the genome