Estimation of the health condition and prevalence of risk factors among adolescents in colleges

The article assesses the level and structure of pathological prevalence, the prevalence of health risk factors among adolescent students of organizations of secondary vocational education in comparison with their peers in schools in Yekaterinburg. Low awareness of health protection among adolescent students and insufficient organization of preventive work in colleges were revealed.В статье дана оценка уровня и структуры патологической пораженности, распространенность факторов риска здоровью среди учащихся подростков организаций среднего профессионального образования в сравнении с их сверстникам в школах г. Екатеринбурга. Выявлена низкая информированность о здоровьесбережении среди студентов подростков и недостаточная организация профилактической работы в колледжах

Portal vein trombosis in a newborn (clinical case)

This article reviews the clinical case of thrombosis in a newborn. A review of the scientific literature, as well as various factors contributing to the development of this pathology.В настоящей статье рассмотрен клинический случай тромбоза воротной вены у новорожденного. Обзор научной литературы, а также разбор факторов, способствующих развитию данной патологии

Machine layout and performance

The Large Hadron Collider (LHC) is one of the largest scientific instruments ever built. Since opening up a new energy frontier for exploration in 2010, it has gathered a global user community of about 7,000 scientists working in fundamental particle physics and the physics of hadronic matter at extreme temperature and density. To sustain and extend its discovery potential, the LHC will need a major upgrade in the 2020s. This will increase its luminosity (rate of collisions) by a factor of five beyond the original design value and the integrated luminosity (total collisions created) by a factor ten. The LHC is already a highly complex and exquisitely optimised machine so this upgrade must be carefully conceived and will require about ten years to implement. The new configuration, known as High Luminosity LHC (HL-LHC), will rely on a number of key innovations that push accelerator technology beyond its present limits. Among these are cutting-edge 11-12 tesla superconducting magnets, compact superconducting cavities for beam rotation with ultra-precise phase control, new technology and physical processes for beam collimation and 300 metre-long high-power superconducting links with negligible energy dissipation. The present document describes the technologies and components that will be used to realise the project and is intended to serve as the basis for the detailed engineering design of HL-LHC

Calculation of Wakefields and Higher Order Modes for the New Design of the Vacuum Chamber of the CMS Experiment for the HL-LHC

To extend the discovery potential of the Large Hadron Collider (LHC) a design study for a novel machine configuration, the High Luminosity LHC (HL-LHC), was started with the goal to increase its luminosity by a factor of 10 beyond its design value. The new machine configuration will also include an upgraded detector configuration and a new beam pipe in the CMS detector. The short range wakefields and the trapped Higher Order Modes (HOMs) for the new design of the vacuum chamber are calculated and compared with the presently used chamber. The kick and loss parameters are presented for different sets of beam parameters. The numerical calculations have been performed with the computer codes MAFIA and ECHO2D. The obtained data are intended to be included into the impedance database of the HL-LHC

High Frequency Impedances in European XFEL.

The method of the optical approximation is used to estimate the high frequency impedances of different vacuum chamber transitions of the European XFEL beam line. The approximations of the longitudinal impedances are obtained in terms of simple one-dimensional integrals. The transverse impedances are written in analytical closed form. The analytical results are compared with the results obtained by numerical solution of Maxwell's equations.Comment: 18 pages, 14 figure