RESUMEN
The development of neonatal surgery is an important task of health care system, because birth defects have been the 2nd most prevalent cause of infant mortality for many years. In order to improve the quality of care for neonates with surgical diseases we studied the main causes of neonatal deaths during the period from 1995 to 2014, on the basis of data from the Children's Surgery Department of Yakutsk. In 77% of cases, the causes of lethal outcomes in neonates with surgical pathology were conditionally preventable. We singled out the basic organizational problems, the solution of which led to a 3.5 times reduction in mortality of infants with surgical pathology during the second period of the study (2005-2014). The main organizational aspects of the regional model of improving medical care of infants with surgical pathology are: antenatal diagnosis of malformations and prenatal consultation with children's surgeon, competent and timely transportation of newborns from district hospitals, the centralization of aid at level 3 hospitals, the introduction of modern diagnostic and treatment algorithms, methods of minimally invasive endosurgery.
Asunto(s)
Causas de Muerte/tendencias , Anomalías Congénitas/mortalidad , Anomalías Congénitas/cirugía , Mortalidad Infantil/tendencias , Regiones Árticas/epidemiología , Teorema de Bayes , Humanos , Lactante , Recién Nacido , Grupos de Población/estadística & datos numéricos , Estudios Retrospectivos , Federación de Rusia/epidemiologíaRESUMEN
A 1000 keV, 5 MW, 1000 s neutral beam injector based on negative ions is being developed in the Budker Institute of Nuclear Physics, Novosibirsk in collaboration with Tri Alpha Energy, Inc. The innovative design of the injector features the spatially separated ion source and an electrostatic accelerator. Plasma or photon neutralizer and energy recuperation of the remaining ion species is employed in the injector to provide an overall energy efficiency of the system as high as 80%. A test stand for the beam acceleration is now under construction. A prototype of the negative ion beam source has been fabricated and installed at the test stand. The prototype ion source is designed to produce 120 keV, 1.5 A beam.
RESUMEN
The paper reviews the results of development of steady-state arc-discharge plasma generator with directly heated LaB6 cathode. This arc-discharge plasma generator produces a plasma jet which is to be converted into an atomic one after recombination on a metallic plate. The plate is electrically biased relative to the plasma in order to control the atom energies. Such an intensive jet of hydrogen atoms can be used in negative ion sources for effective production of negative ions on a cesiated surface of plasma grid. All elements of the plasma generator have an augmented water cooling to operate in long pulse mode or in steady state. The thermo-mechanical stresses and deformations of the most critical elements of the plasma generator were determined by simulations. Magnetic field inside the discharge chamber was optimized to reduce the local power loads. The first tests of the steady-state arc plasma generator prototype have performed in long-pulse mode.
RESUMEN
Two neutral beam injectors have been developed for plasma heating on COMPASS-D tokamak (Institute of Plasma Physics, Prague). The 4-electrodes multihole ion-optical system with beam focusing was chosen to provide the low divergence 300 kW power in both deuterium and hydrogen atoms. The accelerating voltage is 40 kV at extracted ion current up to 15 A. The power supply system provides the continuous and modulated mode of the beam injection at a maximal pulse length 300 ms. The optimal arrangement of the cryopanels and the beam duct elements provides sufficiently short-length beamline which reduces the beam losses. The evolution of the impurities and molecular fraction content is studied in the process of the high voltage conditioning of the newly made ion sources. Two injectors of the same type have been successfully tested and are ready for operation at tokamak in IPP, Prague.
RESUMEN
A 100 MeV eight-turn accelerator-recuperator intended to drive a high-power infrared free-electron laser (FEL) is currently under construction in Novosibirsk. The first stage of the machine includes a one-turn accelerator-recuperator that contains a full-scale RF system. It was commissioned successfully in June 2002.
