ИСПОЛЬЗОВАНИЕ ТЕХНОЛОГИЙ РЕКОНСТРУКТИВНО-ПЛАСТИЧЕСКОЙ МИКРОХИРУРГИИ В СИСТЕМЕ ЛЕЧЕНИЯ БОЛЬНЫХ С ПАТОЛОГИЕЙ ЛОКТЕВОГО СУСТАВА

We have analyzed the results of using modern technologies of plastic and reconstructive microsurgery in treatment of 39 patients with pathology of elbow. We have stated that while using microsurgical technologies as independent and exhaustive method of treating such patients the operations have mainly mobilizing character. They aim to delete scarry contractures and recreate motion in elbow joint. The use of microsurgical technologies in a system of the specialized orthopedic treatment opens a lot of additional opportunities for the reabilitation of patients with pathology of elbow. It mainly concerns indications for performing total elbow arthroplasty and improving its results.Проанализированы результаты использования современных технологий реконструктивно-пластической микрохирургии при лечении 39 больных с различными формами патологии локтевого сустава и его параартикулярных структур. Определены особенности их применения как в качестве самостоятельного и исчерпывающего способа лечения таких пациентов, так и в рамках системы специализированной ортопедоравматологической помощи. В первом случае микрохирургические операции носят, главным образом, мобилизирующий характер и направлены на устранение рубцовых контрактур и восстановление активных движений в локтевом суставе. Выполнение микрохирургических вмешательств в различных сочетаниях с другими обширными высокотехнологичными ортопедическими операциями на локтевом суставе открывает широкие дополнительные возможности для хирургического лечения таких пациентов, прежде всего, в плане расширения показаний и улучшения результатов его тотального эндопротезирования

СОВРЕМЕННАЯ СТРУКТУРА ТЯЖЕЛЫХ ПОВРЕЖДЕНИЙ КИСТИ, ВЫЗВАННЫХ ДЕЙСТВИЕМ ТУПОЙ ТРАВМИРУЮЩЕЙ СИЛЫ

The authors have studied the modern structure of severe blunt hand traumas in 123 patients. The size, type and localization of traumas were considerably determined by the reasons and circumstances of traumas. We have emphasized three main types of severe blunt hand traumas: traumas caused by immediate pressure of considerable traumatizing force (impaction); traumas caused by prolonged pressure of considerable traumatizing force (compression); explosive hand injuries. It has been proved that though the modern severe blunt hand traumas have mainly open character, the existence of various injuries of fascias does not provide complete decompression of compartments of hand and wrist. In the conditions of inadequate surgical treatment it may later lead to development of posttraumatic ischemic contractures of hand.На основании результатов обследования 123 пострадавших изучена современная структура тяжелых травм кисти, вызванных действием тупой травмирующей силы. Установлено, что степень, характер и локализация повреждений различных анатомических образований кисти при подобных травмах в значительной степени определяются их механизмом. На основании этого выделены три основных типа тупых травм кисти: обусловленные мгновенным действием значительной травмирующей силы (удар); вызванные продолжительным действием значительной травмирующей силы (сдавление); взрывные травмы. Доказано, что несмотря на преимущественно открытый характер современной тяжелой тупой травмы кисти, наличие повреждений фасций не обеспечивает полной декомпрессии фасциальных футляров кисти и запястья, что при неадекватной хирургической тактике, как правило, приводит к развитию посттравматических ишемических контрактур кисти

The “Horizon-T” Experiment: Extensive Air Showers Detection

Horizon - T is a n innovative detector system constructed to study Extensive Air Showers (EAS) in the energy range above 10 16 eV coming from a wide range of zenith angles (0 o - 85 o ). The system is located at Tien Shan high - altitude Science Station of Lebedev Physical Institute of the Russian Academy of Sciences at approximately 3340 meters above the sea level. It consists of eight charged particle detection points separated by the distance up to one kilometer as well as optical detector subsystem to view the Vavilov - Cherenkov light from the EAS. The time resolution of charged particles and Vavilov - Cherenkov light photons passage of the detector system is a few ns. This level of resolution allows conducting research of atmos pheric development of individual EAS

Experimental Evidence of Giant Electron - Gamma Bursts Generated by Extensive Atmospheric Showers in Thunderclouds

The existence of a new phenomena - giant electron-gamma bursts is established. The bursts are generated in thunderclouds as a result of the combined action of runaway breakdown and extensive atmosphere showers (RB-EAS). The experiments were fulfilled at the Tien Shan Mountain Scientific Station using EAS-Radio installation. This specially constructed installation consists of a wide spread EAS trigger array and a high time resolution radiointerferometer.Comment: 30 pages, 16 figure

Accelerating units for commercial resonator LINACs model UELR-10-10S designed for radiation sterilization development and results of testing

Some specific design features of the accelerating units for LINACs model UELR-10-10S designed for radiation sterilization and the electron beam characteristics obtained experimentally are considered.Описываются некоторые особенности конструкции ускорителей модели УЭЛР-10-10С, приводятся и обсуждаются характеристики электронного пучка, полученные экспериментально.Описуються деякі особливості конструкції прискорювачів моделі УЕЛР-10-10С, приводяться і обговорюються характеристики електронного пучка, отримані експериментально

Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results

Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC

Measurements of inclusive jet suppression in heavy ion collisions at the LHC provide direct sensitivity to the physics of jet quenching. In a sample of lead-lead collisions at sqrt(s) = 2.76 TeV corresponding to an integrated luminosity of approximately 7 inverse microbarns, ATLAS has measured jets with a calorimeter over the pseudorapidity interval |eta| < 2.1 and over the transverse momentum range 38 < pT < 210 GeV. Jets were reconstructed using the anti-kt algorithm with values for the distance parameter that determines the nominal jet radius of R = 0.2, 0.3, 0.4 and 0.5. The centrality dependence of the jet yield is characterized by the jet "central-to-peripheral ratio," Rcp. Jet production is found to be suppressed by approximately a factor of two in the 10% most central collisions relative to peripheral collisions. Rcp varies smoothly with centrality as characterized by the number of participating nucleons. The observed suppression is only weakly dependent on jet radius and transverse momentum. These results provide the first direct measurement of inclusive jet suppression in heavy ion collisions and complement previous measurements of dijet transverse energy imbalance at the LHC.Comment: 15 pages plus author list (30 pages total), 8 figures, 2 tables, submitted to Physics Letters B. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2011-02

Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at sqrt(s) = 7 TeV with the ATLAS experiment

This paper describes an analysis of the angular distribution of W->enu and W->munu decays, using data from pp collisions at sqrt(s) = 7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb^-1. Using the decay lepton transverse momentum and the missing transverse energy, the W decay angular distribution projected onto the transverse plane is obtained and analysed in terms of helicity fractions f0, fL and fR over two ranges of W transverse momentum (ptw): 35 < ptw < 50 GeV and ptw > 50 GeV. Good agreement is found with theoretical predictions. For ptw > 50 GeV, the values of f0 and fL-fR, averaged over charge and lepton flavour, are measured to be : f0 = 0.127 +/- 0.030 +/- 0.108 and fL-fR = 0.252 +/- 0.017 +/- 0.030, where the first uncertainties are statistical, and the second include all systematic effects.Comment: 19 pages plus author list (34 pages total), 9 figures, 11 tables, revised author list, matches European Journal of Physics C versio

Observation of a new chi_b state in radiative transitions to Upsilon(1S) and Upsilon(2S) at ATLAS

The chi_b(nP) quarkonium states are produced in proton-proton collisions at the Large Hadron Collider (LHC) at sqrt(s) = 7 TeV and recorded by the ATLAS detector. Using a data sample corresponding to an integrated luminosity of 4.4 fb^-1, these states are reconstructed through their radiative decays to Upsilon(1S,2S) with Upsilon->mu+mu-. In addition to the mass peaks corresponding to the decay modes chi_b(1P,2P)->Upsilon(1S)gamma, a new structure centered at a mass of 10.530+/-0.005 (stat.)+/-0.009 (syst.) GeV is also observed, in both the Upsilon(1S)gamma and Upsilon(2S)gamma decay modes. This is interpreted as the chi_b(3P) system.Comment: 5 pages plus author list (18 pages total), 2 figures, 1 table, corrected author list, matches final version in Physical Review Letter

Search for displaced vertices arising from decays of new heavy particles in 7 TeV pp collisions at ATLAS

We present the results of a search for new, heavy particles that decay at a significant distance from their production point into a final state containing charged hadrons in association with a high-momentum muon. The search is conducted in a pp-collision data sample with a center-of-mass energy of 7 TeV and an integrated luminosity of 33 pb^-1 collected in 2010 by the ATLAS detector operating at the Large Hadron Collider. Production of such particles is expected in various scenarios of physics beyond the standard model. We observe no signal and place limits on the production cross-section of supersymmetric particles in an R-parity-violating scenario as a function of the neutralino lifetime. Limits are presented for different squark and neutralino masses, enabling extension of the limits to a variety of other models.Comment: 8 pages plus author list (20 pages total), 8 figures, 1 table, final version to appear in Physics Letters