Interregional Inequality of Population Incomes: Problems of Methodology and Estimation in the Russian Federation

Currently, the priority of the Russian Federation socio-economic development is to achieve sustainable economic growth. A significant obstacle to the achievement of this goal is the unevenness and disproportionality in the socio-economic development of the Russian regions. This circumstance makes the problem of an objective and adequate assessment of Russian regions the interregional differentiation particularly relevant. The study notes that the nominal monetary income of the population does not take into account regional differences in price level. This work discusses methodological approaches of reliable determination, advantages of weighted and unweighted estimates in the interregional inequality, special attention is paid to weighing the average per capita indicators of the subject of the Russia for the proportion of the region’s population in the country’s population. To assess the purchasing power of the population at the regional level, the authors propose to use a modified cost of living index. As a result of the study, the dynamics of the variation coefficient of the average per capita monetary incomes of the population and adjusted for the modified cost-of-living index were determined, on the basis of which the regions of Russia were divided into three groups. The efficiency of the transition to the analysis of incomes comparable in purchasing power, as comparison of weighted and unweighted variation coefficients, has been proved. The trend towards smoothing interregional inequality, which is caused by the accelerated growth of real incomes of the population in the low-income group of Russian regions

ХИРУРГИЧЕСКОЕ ЛЕЧЕНИЕ ИЗОЛИРОВАННОЙ АСЕПТИЧЕСКОЙ НЕСТАБИЛЬНОСТИ ВЕРТЛУЖНОГО КОМПОНЕНТА У ПАЦИЕНТОВ СО СТАБИЛЬНЫМ ФЕМОРАЛЬНЫМ КОМПОНЕНТОМ

Background: Aseptic acetabular loosening currently occupies the 1st place in the structure of delayed complications after total hip arthroplasty. The basis of treatment is the replacement of a loosening cup and a pair of friction. The tactics of surgical treatment of the stable correctly oriented femoral component have not been determined, thoroughly which confirms the relevance of the study.Aims: Compare the effectiveness of total hip revision and isolated acetabular revision in patients with aseptic acetabular loosening and stable correctly oriented femoral component.Materials and methods: The study presented the results of surgical treatment performed in 44 patients (45 revisions) with isolated aseptic acetabular loosening and stable correctly oriented femoral component were presented, Patients were divided into two groups depending on the severity of surgery. The first group included 16 patients with a total revision due to irregular cone of the stem. The second group included 28 patients (29 revisions) with an isolated replacement of the unstable cup and a pair of friction.Results: In the 1st group, revision surgery was performed to replace both cup with the friction pair and stable correctly oriented stem which finally results in lower postoperative red blood counts (erythrocytes, hemoglobin, hematocrit), as well as higher intraoperative blood loss volume and longer duration of surgical intervention if compare to the 2nd group where the stable correctly oriented femoral component was not changed. Postoperative results assessed using Harris scales and Oxford Hip Score in the comparison group were at a higher level during the whole period of follow-up. A moderate coorelation between the severity of the revision intervention and its results was detected.Conclusions: Preservation of a stable correctly oriented stem allows to reduce the severity of the revision intervention which improves the results and shortens the period of patient rehabilitation.Обоснование. Асептическая нестабильность вертлужного компонента в настоящее время занимает первое место в структуре отдаленных осложнений тотального эндопротезирования тазобедренного сустава. Основу лечения составляет замена расшатанной чашки эндопротеза и пары трения (головка-вкладыш). Тактика действий в отношении же стабильного правильно ориентированного феморального компонента до сих пор не определена, что и подтверждает актуальность исследования.Цель исследования ― сравнить эффективность тотальной замены компонентов эндопротеза и изолированной ревизии чашки эндопротеза у пациентов с асептической нестабильностью вертлужного компонента и стабильным правильно ориентированным феморальным компонентом.Методы. Представлены результаты проспективного контролируемого исследования 44 пациентов (45 ревизий) с изолированной асептической нестабильностью вертлужного компонента и стабильным правильно ориентированным феморальным компонентом, которые в зависимости от объема проведенного вмешательства были разделены на две группы. В 1-ю группу были включены 16 пациентов (16 ревизий) с тотальной ревизией компонентов эндопротеза по причине отсутствия головок под нестандартный конус ножки. Во 2-ю группу вошли 28 пациентов (29 ревизий) с изолированной заменой расшатанной чашки эндопротеза и пары трения.Результаты. В 1-й группе, где ревизионное вмешательство помимо замены нестабильной чашки эндопротеза и пары трения включало удаление и замену стабильной правильно ориентированной ножки эндопротеза, были получены более низкие послеоперационные показатели красной крови (эритроциты, гемоглобин, гематокрит), а также более высокие значения объема интраоперационной кровопотери и продолжительности оперативного вмешательства, чем во 2-й группе, где стабильный правильно ориентированный феморальный компонент сохранялся. Послеоперационные результаты, оцененные при помощи шкал Харриса и Oxford Hip Score, во 2-й группе на всех сроках наблюдения находились на более высоком уровне. Между тяжестью ревизионного вмешательства и его результатами была выявлена корреляционная связь средней силы.Заключение. Сохранение стабильного правильно ориентированного феморального компонента позволяет снизить тяжесть ревизионного вмешательства, что способствует улучшению его результатов и сокращению сроков реабилитации пациентов

Biomechanical Basis Of External Fixation In Patients With Femur Fractures

Advantages of osteosynthesis of femur fractures by means of rod type external fixation devices have been under the study. Computer modelling on the basis of methods of deformable firm body mechanics for pin and rod devices for external fixation has been performe

SRPES and STM data for the model bimetallic Pd In HOPG catalysts Effects of mild post synthesis oxidative treatments

Post synthesis treatment of bimetallic catalysts in different gas phases resulting in the adsorption induced segregation is among promising approaches to enhance their activity not compromising selectivity towards a number of low temperature reactions. Our recently published paper M.A. Panafidin, A.V. Bukhtiyarov, I.P. Prosvirin, I.A. Chetyrin, A.Yu. Klyushin, A. Knop Gericke, N.S. Smirnova, P.V. Markov, I.S. Mashkovsky, Y.V. Zubavichus, A.Yu. Stakheev, V.I. Bukhtiyarov, A mild post synthesis oxidative treatment of Pd In HOPG bimetallic catalysts as a tool of their surface structure fine tuning. Appl. Surf. Sci. reports on Pd In intermetallic formation regularities and their evolution after storage in air as well as during treatment in oxygen at submillibar pressures. The current paper gives an extended representation of experimental ex situ in situ synchrotron based photoelectron spectroscopy SRPES and scanning tunnelling microscopy STM data used to derive scientific conclusions in the paper quoted abov

Horizontal Branch Stars: The Interplay between Observations and Theory, and Insights into the Formation of the Galaxy

We review HB stars in a broad astrophysical context, including both variable and non-variable stars. A reassessment of the Oosterhoff dichotomy is presented, which provides unprecedented detail regarding its origin and systematics. We show that the Oosterhoff dichotomy and the distribution of globular clusters (GCs) in the HB morphology-metallicity plane both exclude, with high statistical significance, the possibility that the Galactic halo may have formed from the accretion of dwarf galaxies resembling present-day Milky Way satellites such as Fornax, Sagittarius, and the LMC. A rediscussion of the second-parameter problem is presented. A technique is proposed to estimate the HB types of extragalactic GCs on the basis of integrated far-UV photometry. The relationship between the absolute V magnitude of the HB at the RR Lyrae level and metallicity, as obtained on the basis of trigonometric parallax measurements for the star RR Lyrae, is also revisited, giving a distance modulus to the LMC of (m-M)_0 = 18.44+/-0.11. RR Lyrae period change rates are studied. Finally, the conductive opacities used in evolutionary calculations of low-mass stars are investigated. [ABRIDGED]Comment: 56 pages, 22 figures. Invited review, to appear in Astrophysics and Space Scienc

Deep exclusive π+\pi^+ electroproduction off the proton at CLAS

The exclusive electroproduction of $\pi^+$ above the resonance region was studied using the $\rm{CEBAF}$ Large Acceptance Spectrometer ($\rm{CLAS}$) at Jefferson Laboratory by scattering a 6 GeV continuous electron beam off a hydrogen target. The large acceptance and good resolution of $\rm{CLAS}$, together with the high luminosity, allowed us to measure the cross section for the $\gamma^* p \to n \pi^+$ process in 140 ($Q^2$, $x_B$, $t$) bins: $0.16<x_B<0.58$, 1.6 GeV$^2<$$Q^2$$<4.5$ GeV$^2$ and 0.1 GeV$^2<$$-t$$<5.3$ GeV$^2$. For most bins, the statistical accuracy is on the order of a few percent. Differential cross sections are compared to two theoretical models, based either on hadronic (Regge phenomenology) or on partonic (handbag diagram) degrees of freedom. Both can describe the gross features of the data reasonably well, but differ strongly in their ingredients. If the handbag approach can be validated in this kinematical region, our data contain the interesting potential to experimentally access transversity Generalized Parton Distributions.Comment: 18pages, 21figures,2table

First measurement of direct f0(980)f_0(980) photoproduction on the proton

We report on the results of the first measurement of exclusive $f_0(980)$ meson photoproduction on protons for $E_\gamma=3.0 - 3.8$ GeV and $-t = 0.4-1.0$ GeV$^2$. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The resonance was detected via its decay in the $\pi^+ \pi^-$ channel by performing a partial wave analysis of the reaction $\gamma p \to p \pi^+ \pi^-$. Clear evidence of the $f_0(980)$ meson was found in the interference between $P$ and $S$ waves at $M_{\pi^+ \pi^-}\sim 1$ GeV. The $S$-wave differential cross section integrated in the mass range of the $f_0(980)$ was found to be a factor of 50 smaller than the cross section for the $\rho$ meson. This is the first time the $f_0(980)$ meson has been measured in a photoproduction experiment

A Bayesian analysis of pentaquark signals from CLAS data

We examine the results of two measurements by the CLAS collaboration, one of which claimed evidence for a $\Theta^{+}$ pentaquark, whilst the other found no such evidence. The unique feature of these two experiments was that they were performed with the same experimental setup. Using a Bayesian analysis we find that the results of the two experiments are in fact compatible with each other, but that the first measurement did not contain sufficient information to determine unambiguously the existence of a $\Theta^{+}$. Further, we suggest a means by which the existence of a new candidate particle can be tested in a rigorous manner.Comment: 5 pages, 3 figure

Deeply Virtual Compton Scattering Beam-Spin Asymmetries

The beam spin asymmetries in the hard exclusive electroproduction of photons on the proton (ep -> epg) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (x_B from 0.11 to 0.58, Q^2 from 1 to 4.8 GeV^2, -t from 0.09 to 1.8 GeV^2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A = a*sin(phi)/[1+c*cos(phi)]. This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.Comment: 1 tex file (6 pages), 4 (eps) figure