Interregional labor migration as a tool to increase regional labor productivity : the case of Russia

Purpose: The paper deals with the analysis of the influence of interregional labor migration in the Russian Federation on regional labor productivity. Design/Methodology/Approach: Empirical analysis was conducted on the statistical data collected from the Federal State Statistics Service of the Russian Federation. The sample includes data on 85 subjects of the Russian Federation for the period 2011-2016. The study substantiates the impact of interregional labor migration in the Russian Federation on regional labor productivity and to form the tools for managing migration processes, ensuring its improvement. Findings: The study showed that interregional differences in wages, the differentiation of the characteristics of labor markets in the region of residence and the potential region of employment, different transport accessibility and additional employee costs associated with staying in another region are the main economic reasons for interregional labor migration in the Russian Federation. The regression analysis confirmed hypotheses that higher level of labor migration from the region leads to a decrease in labor productivity in the region. Practical Implications: Based on the empirically derived relationships, authors created a set of tools for managing migration processes, ensuring their improvement, which can be used for the development of program documents at the regional and interregional levels. Originality/Value: The main contribution of this study is the combination of deep statistical analysis and migration factors'analysis to provide valuable conclusions in interregional labor migrations.peer-reviewe

Polysomnogram in the diagnosis of hypogonadism and erectile dysfunction in patients with sleep apnea syndrome

We consider the problem of erectile dysfunction and hypogonadism in patients with obstructive sleep apnea syndrome in 92 patients. In 50 patients (54.4%) diagnosed with ED, hypogonadism was diagnosed in 41.3% of patients. Conducted by ROC-analysis (Receiver Operating Characteristic) ratio of the parameters characterizing the level of hypoxia with plasma testosterone levels in patients with OSA is indicative of their significant correlation dependence. In patients with obstructive sleep apnea syndrome with an index of apnea/gipopnoe over 20 the risk of hypogonadism increases progressively.Рассмотрена проблема эректильной дисфункции (ЗД) и гипогонадизма у пациентов с синдромом обструктивного апноэ сна (СОАС) у 92 пациентов. У 50 больных (54.4 %) диагностирована ЗД, гипогонадизм выявлен у 41,3 % пациентов. Проведенный ROC-анализ (Receiver Operating Characteristic) соотношения параметров, характеризующих уровень гипоксии с уровнем тестостерона плазмы крови у пациентов с СОАС, свидетельствует об их значимой кореляционной зависимости. У пациентов с синдромом обструктивного апноэ сна с индексом апное/гипопное (А/Г) более 20 риск гипогонадизма прогрессивно возрастает

Observation of an Excited Bc+ State

Using pp collision data corresponding to an integrated luminosity of 8.5 fb-1 recorded by the LHCb experiment at center-of-mass energies of s=7, 8, and 13 TeV, the observation of an excited Bc+ state in the Bc+π+π- invariant-mass spectrum is reported. The observed peak has a mass of 6841.2±0.6(stat)±0.1(syst)±0.8(Bc+) MeV/c2, where the last uncertainty is due to the limited knowledge of the Bc+ mass. It is consistent with expectations of the Bc∗(2S31)+ state reconstructed without the low-energy photon from the Bc∗(1S31)+→Bc+γ decay following Bc∗(2S31)+→Bc∗(1S31)+π+π-. A second state is seen with a global (local) statistical significance of 2.2σ (3.2σ) and a mass of 6872.1±1.3(stat)±0.1(syst)±0.8(Bc+) MeV/c2, and is consistent with the Bc(2S10)+ state. These mass measurements are the most precise to date

Measurement of the inelastic pp cross-section at a centre-of-mass energy of 13TeV

The cross-section for inelastic proton-proton collisions at a centre-of-mass energy of 13TeV is measured with the LHCb detector. The fiducial cross-section for inelastic interactions producing at least one prompt long-lived charged particle with momentum p > 2 GeV/c in the pseudorapidity range 2 < η < 5 is determined to be ϭ acc = 62:2 ± 0:2 ± 2:5mb. The first uncertainty is the intrinsic systematic uncertainty of the measurement, the second is due to the uncertainty on the integrated luminosity. The statistical uncertainty is negligible. Extrapolation to full phase space yields the total inelastic proton-proton cross-section ϭ inel = 75:4 ± 3:0 ± 4:5mb, where the first uncertainty is experimental and the second due to the extrapolation. An updated value of the inelastic cross-section at a centre-of-mass energy of 7TeV is also reported

Брахитерапия низкой и высокой мощности дозы в комбинации с дистанционной лучевой терапией и андроген-депривационной терапией у больных раком предстательной железы высокого риска

Background. Prostate cancer (PCa) in the Russian Federation takes the leading place in the prevalence of cancer among the male population.Objective: to investigate the effect of increasing a single focal dose in high-dose-rate brachytherapy (HDR-BT) in combination with external beam radiotherapy on biochemical failure-free survival and local control in patients with high-risk PCa. Materials and methods. The study included 350 men with PCa in the group of high and extremely high risk of progression. All patients included in the study were divided into 4 groups. Groups 1, 2 and 3 included 276 patients who received HDR-BT with a 192Ir source with a single dose per fraction: 10 Gy (n = 83), 12 Gy (n = 46) and 15 Gy (n = 147). Group 4 included 74 patients who received low-dose-rate brachytherapy with 125I sources up to a total focal dose of 110 Gy. At the 2 stage, external beam radiotherapy was a conventional fractionation (single dose of 2 Gy, total - 44-46 Gy).Results. Of 350 patients over a 5-year follow-up period, PCa recurrence was noted in 65 (18.6 %). The 3- and 5-year biochemical failure-free survival rates in the general cohort of patients were 87.4 and 81.4 %. 5-year biochemical failure-free survival was significantly higher in group 3 relative to group 4 and amounted to 89.8 and 74.2 % (p = 0.03). Increasing the dose for HDR-BT from 10 to 12 Gy per fraction significantly reduced the frequency of local relapses from 15.7 % (in group 1) to 2.2 % (in group 2) (p = 0.0001) while maintaining the level of genitourinary and gastrointestinal toxicity. Conclusion. The use of a combination of brachytherapy and external beam radiotherapy in patients with high risk PCa is highly effective in achieving local control of the tumor. The optimal fractionation regime for HDR-BT remains a matter of debate. The use of 15 Gy per fraction for HDR-BT in combination with external beam radiotherapy is the most optimal fractionation regimen in patients with high-risk PCa.Введение. Рак предстательной железы (РПЖ) в России продолжает занимать лидирующее место по распространенности среди онкологических заболеваний мужского населения.Цель исследования - изучить влияние увеличения разовой очаговой дозы при брахитерапии высокой мощности дозы (HDR-БТ) в комбинации с дистанционной лучевой терапией на безрецидивную выживаемость и локальный контроль над опухолью у больных РПЖ высокого риска прогрессирования.Материалы и методы. В исследование были включены 350 мужчин с РПЖ группы высокого и крайне высокого риска прогрессирования. Все пациенты были разделены на 4 группы. В 1, 2 и 3-ю группы вошли 276 пациентов, которым в качестве boost применялась HDR-БТ источником 192Ir с разовой дозой за 1 фракцию 10 Гр (n = 83), 12 Гр (n = 46) и 15 Гр (n = 147) соответственно. В 4-ю группу вошли 74 пациента, которым использовалась брахитерапия низкой мощности дозы источниками 125I до суммарной очаговой дозы 110 Гр. На 2-м этапе проводилась дистанционная лучевая терапия на зону предстательной железы и регионарного лимфооттока в стандартном режиме фракционирования (разовая доза 2 Гр, суммарная доза 44-46 Гр).Результаты. Из 350 пациентов за 5 лет наблюдения рецидив РПЖ отмечен у 65 (18,6 %) больных. В общей когорте пациентов 3- и 5-летняя специфическая выживаемость по уровню простатического специфического антигена (ПСА) составила 87,4 и 81,4 % соответственно. ПСА-специфическая 5-летняя выживаемость была достоверно выше в 3-й группе, чем в 4-й, и составила 89,8 и 74,2 % соответственно (р = 0,03). Увеличение дозы при HDR-БТ с 10 до 12 Гр за фракцию достоверно снизило частоту локальных рецидивов с 15,7 % (в 1-й группе) до 2,2 % (во 2-й группе) (p = 0,0001) при сохранении уровня генитоуринарной и гастроинтестинальной токсичности.Заключение. Применение комбинации брахитерапии и дистанционной лучевой терапии у больных РПЖ высокого риска прогрессирования характеризуется высокой эффективностью в достижении локального контроля над опухолью. Оптимальный режим фракционирования при HDR-БТ остается предметом обсуждения. Использование дозы 15 Гр за фракцию при HDR-БТ в комбинации с дистанционной лучевой терапией является наиболее оптимальным режимом фракционирования у больных РПЖ высокого риска

Observation of the Decay Λ0b→Λ+cτ−¯ν

The first observation of the semileptonic b-baryon decay Λb0→Λc+τ-ν¯τ, with a significance of 6.1σ, is reported using a data sample corresponding to 3 fb-1 of integrated luminosity, collected by the LHCb experiment at center-of-mass energies of 7 and 8 TeV at the LHC. The τ- lepton is reconstructed in the hadronic decay to three charged pions. The ratio K=B(Λb0→Λc+τ-ν¯τ)/B(Λb0→Λc+π-π+π-) is measured to be 2.46±0.27±0.40, where the first uncertainty is statistical and the second systematic. The branching fraction B(Λb0→Λc+τ-ν¯τ)=(1.50±0.16±0.25±0.23)% is obtained, where the third uncertainty is from the external branching fraction of the normalization channel Λb0→Λc+π-π+π-. The ratio of semileptonic branching fractions R(Λc+)B(Λb0→Λc+τ-ν¯τ)/B(Λb0→Λc+μ-ν¯μ) is derived to be 0.242±0.026±0.040±0.059, where the external branching fraction uncertainty from the channel Λb0→Λc+μ-ν¯μ contributes to the last term. This result is in agreement with the standard model prediction

A study of CP violation in the decays B±→[K+K-π+π-]Dh± (h= K, π) and B±→[π+π-π+π-]Dh±

The first study of CP violation in the decay mode B±→[K+K-π+π-]Dh± , with h= K, π , is presented, exploiting a data sample of proton–proton collisions collected by the LHCb experiment that corresponds to an integrated luminosity of 9 \,fb - 1 . The analysis is performed in bins of phase space, which are optimised for sensitivity to local CP asymmetries. CP -violating observables that are sensitive to the angle γ of the Unitarity Triangle are determined. The analysis requires external information on charm-decay parameters, which are currently taken from an amplitude analysis of LHCb data, but can be updated in the future when direct measurements become available. Measurements are also performed of phase-space integrated observables for B±→[K+K-π+π-]Dh± and B±→[π+π-π+π-]Dh± decays

Measurement of antiproton production from antihyperon decays in pHe collisions at √sNN=110GeV

The interpretation of cosmic antiproton flux measurements from space-borne experiments is currently limited by the knowledge of the antiproton production cross-section in collisions between primary cosmic rays and the interstellar medium. Using collisions of protons with an energy of 6.5 TeV incident on helium nuclei at rest in the proximity of the interaction region of the LHCb experiment, the ratio of antiprotons originating from antihyperon decays to prompt production is measured for antiproton momenta between 12 and 110GeV\!/c . The dominant antihyperon contribution, namely Λ¯ → p¯ π+ decays from promptly produced Λ¯ particles, is also exclusively measured. The results complement the measurement of prompt antiproton production obtained from the same data sample. At the energy scale of this measurement, the antihyperon contributions to antiproton production are observed to be significantly larger than predictions of commonly used hadronic production models

Measurement of τL using the Bs0 →J/ψη decay mode

Using a proton–proton collision data sample collected by the LHCb detector and corresponding to an integrated luminosity of 5.7fb-1 , the lifetime of the light Bs0 mass eigenstate, τL , is measured using the Bs0→J/ψη decay mode to be τL=1.445±0.016(stat)±0.008(syst)ps. A combination of this result with a previous LHCb analysis using an independent dataset corresponding to 3 fb - 1 of integrated luminosity gives τL=1.452±0.014±0.007±0.002ps, where the first uncertainty is statistical, the second due to the uncorrelated part of the systematic uncertainty and the third due to the correlated part of the systematic uncertainty

Observation of the doubly charmed baryon decay Ξcc++→Ξc′+π+

The Ξcc++→Ξc′+π+ decay is observed using proton-proton collisions collected by the LHCb experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb−1. The Ξcc++→Ξc′+π+ decay is reconstructed partially, where the photon from the Ξc′+→Ξc+γ decay is not reconstructed and the pK−π+ final state of the Ξc+ baryon is employed. The Ξcc++→Ξc′+π+branching fraction relative to that of the Ξcc++→Ξc+π+ decay is measured to be 1.41 ± 0.17 ± 0.10, where the first uncertainty is statistical and the second systematic. [Figure not available: see fulltext.