Development of linear proton accelerators with the high average beam power

Review of the current situation in the development of powerful linear proton accelerators carried out in many countries is given. The purpose of their creation is solving problems of safe and efficient nuclear energetics on a basis of the accelerator-reactor complex. In this case a proton beam with the energy up to 1 GeV, the average current of 30 mA is required. At the same time there is a needed in more powerful beams, for example, for production of tritium and transmutation of nuclear waste products. The creation of accelerators of such a power will be followed by the construction of linear accelerators of 1 GeV but with a more moderate beam current. They are intended for investigation of many aspects of neutron physics and neutron engineering. Problems in the creation of efficient constructions for the basic and auxiliary equipment, the reliability of the systems, and minimization of the beam losses in the process of acceleration will be solved

Beam technologies for incineration and transmutation of the nuclear waste

The problem of nuclear wastes is accounted from the viewpoint of 3 aspects: ecological expediency, influence on the environment, and safety with respect to explosion. The most efficient method is burning of the wastes in the Energy Amplifier, which is based on the complex of the reactor-accelerator. The goal of this paper is to scope the development of complex techniques of the transuranic elements (TRU) incineration, and transmutation most hazardous long-lived radionuclides, fragments of nuclear fission, eliminated with the heat removal through the natural convection of air. The main part of the work is associated with setting up the problem for Ukrainian nuclear energetics: the nuclear waste incineration as an alternative to the geological disposal

Black hole solutions with dilatonic hair in higher curvature gravity

A new numerical integration method for examining a black hole structure was realized. Black hole solutions with dilatonic hair of 4D low energy effective SuperString Theory action with Gauss-Bonnet quadratic curvature contribution were studied, using this method, inside and outside the event horizon. Thermodynamical properties of this solution were also studied.Comment: 10 pages, 6 figures, RevTeX, figures in LaTeX or PostScript are avaible upon request via e-mail address: [email protected], Submitted to Phys.Rev.

Condon domain phase diagram for silver

We present the Condon domain phase diagram for a silver single crystal measured in magnetic fields up to 28 T and temperatures down to 1.3 K. A standard ac method with a pickup coil system is used at low frequency for the measurements of the de Haas–van Alphen effect (dHvA). The transition point from the state of homogeneous magnetization to the inhomogeneous Condon domain state (CDS) is found as the point where a small irreversibility in the dHvA magnetization arises, as manifested by an extremely nonlinear response in the pickup voltage showing threshold character. The third harmonic content in the ac response is used to determine with high precision the CDS phase boundary. The experimentally determined Condon domain phase diagram is in good agreement with the theoretical prediction calculated by the standard Lifshitz–Kosevich formula

Superheavy Dark Matter with Discrete Gauge Symmetries

We show that there are discrete gauge symmetries protect naturally heavy X particles from decaying into the ordinary light particles in the supersymmetric standard model. This makes the proposal very attractive that the superheavy X particles constitute a part of the dark matter in the present universe. It is more interesting that there are a class of discrete gauge symmetries which naturally accommodate a long-lived unstable X particle. We find that in some discrete Z_{10} models, for example, a superheavy X particle has lifetime \tau_X \simeq 10^{11}-10^{26} years for its mass M_X \simeq 10^{13}-10^{14} GeV. This long lifetime is guaranteed by the absence of lower dimensional operators (of light particles) couple to the X. We briefly discuss a possible explanation for the recently observed ultra-high-energy cosmic ray events by the decay of this unstable X particle.Comment: 9 pages, Late

Морфологические и качественные показатели тушек бройлерных петушков кросса "Кобб 500"

The dynamics of live weight and the morphological composition of carcasses of broiler chickens “Cobb 500” at 1-, 21-, 28-, 33-, 38- and 42-day-old ages were studied. It was found that the increase in the average daily growth in broiler males is observed up to the 33-day age, on average they are 62.7 g, then up to 42 days - 85.56 g. The slaughter yield in 33-day broilers was 71.83%, 42 days - 73.12%. The carcass contains the most muscle tissue, from 994 g (33 day), or 65.57%, to 1410 g, or 66.95% (42 days). By the 42-day age of the males, the absolute mass of muscles is 178.26 times higher than the weight of the 1-day-old ones. The relative mass of bones in the carcasses of 33-day-old males is 20.32%, 42-day-olds - 16.52%. The anatomical cutting of the carcasses shows that the breast yield is 35.95-36.23%, the hips - 17.15-17.09%, the shins - 14.38-14.20%, the wings -11.15-10.68%. It is established that anatomically parts of the carcass differ in quality because of the different ratio of muscle tissue and bones in them.Изучали динамику живой массы и морфологический состав тушек цыплят-бройлеров кросса «Кобб 500» в 1-, 21-, 28-, 33-, 38- и 42-дневном возрастах. Выявлено, что повышение среднесуточных приростов у бройлерных петушков наблюдается до 33-дневного возраста, в среднем составляют 62,7 г, далее до 42 дней - 85,56 г. Убойный выход у 33-дневных бройлеров равнялся 71,83%, 42 дня - 73,12%. В тушках больше всего содержится мышечной ткани, от 994 г (33-дневные), или 65,57%, до 1410 г, или 66,95% (42 дн.). К 42-дневному возрасту петушков абсолютная масса мышц по сравнению с массой 1-дневных увеличивается в 178,26 раза. Относительная масса костей в тушках 33-дневных петушков составляет 20,32%, 42-дневных - 16,52%. Данные анатомической разделки тушек показывают, что выход грудки равняется 35,95-36,23%, бедра - 17,15-17,09%, голени -14,38-14,20%, крыла - 11,15-10,68%. Установлено, что анатомически части тушки отличаются по качеству из-за разного соотношения в них мышечной ткани и костей

Требования к профессиональной подготовке врачей для лицензирования медицинской деятельности

Requirement for licensing of medical activity and level of professional knowledge are discussed in the article.В статье освещен вопрос лицензирования медицинской деятельности и требования к образовательному уровню специалистов, претендующих на самостоятельную медицинскую деятельность

Conoscopic patterns in photonic band gap of cholesteric liquid crystal cells with twist defects

We theoretically investigate into the effects of the incidence angles in light transmission of cholesteric liquid crystal two-layer sandwich structures with twist defects created by rotation of the one layer about the helical axis.The conoscopic images and polarization resolved patterns are obtained for thick layers by computing the intensity and the polarization parameters as a function of the incidence angles.In addition to the defect angle induced rotation of the pictures as a whole, the rings of defect mode resonances are found to shrink to the origin and disappear as the defect twist angle varies from zero to its limiting value and beyond.Comment: revtex4, 7 pages, 4 figure