Status of the NICA project at JINR

AbstractThe NICA (Nuclotron-based Ion Collider fAcility) project is now under active realization at the Joint Institute for Nuclear Research (JINR, Dubna). The main goal of the project is a study of hot and dense strongly interacting matter in heavy ion (up to Au) collisions at the centre-of-mass energies up to 11 GeV per nucleon. Two modes of operation are foreseen, collider mode and extracted beams, with two detectors: MPD and BM@N. The both experiments are in preparation stage. An average luminosity in the collider mode is expected as 10E27 cm-2 s-1 for Au (79+). Extracted beams of various nucleus species with maximum momenta of 13 GeV/c (for protons) will be available. A study of spin physics with extracted and colliding beams of polarized deuterons and protons at the energies up to 27 GeV (for protons) is foreseen with the NICA facility. The proposed program allows one to search for possible signs of phase transitions and critical phenomena as well as to shed light on the problem of thenucleon spin structure

The exact Darwin Lagrangian

Darwin (1920) noted that when radiation can be neglected it should be possible to eliminate the radiation degrees-of-freedom from the action of classical electrodynamics and keep the discrete particle degrees-of-freedom only. Darwin derived his well known Lagrangian by series expansion in $v/c$ keeping terms up to order $(v/c)^2$. Since radiation is due to acceleration the assumption of low speed should not be necessary. A Lagrangian is suggested that neglects radiation without assuming low speed. It cures deficiencies of the Darwin Lagrangian in the ultra-relativistic regime.Comment: 2.5 pages, no figure

Classical dilute relativistic plasma in equilibrium. Two-particle distribution function

We consider here a dilute hot plasma which is homogeneous and in equilibrium in the framework of classical relativistic statistical mechanics as formulated recently by the authors. No external fields are present. The two-particle distribution function of the plasma is calculated for any temperature. This distribution will be physically significant, as long as the creation of pairs can be neglected. Several limits which apply at low or high temperatures are discussed. Comparison with previous work from several authors is made

Magnetic Field Limitations on Advection Dominated Flows

Recent papers discussing advection dominated accretion flows (ADAF) as a solution for astrophysical accretion problems should be treated with some caution because of their uncertain physical basis. The suggestions underlying ADAF involve ignoring the magnetic field reconnection in heating of the plasma flow, assuming electron heating due only to binary Coulomb collisions with ions. Here, we analyze the physical processes in optically thin accretion flows at low accretion rates including the influence of an equipartition turbulent magnetic field. For these conditions there is continuous destruction of magnetic flux by reconnection. The reconnection is expected to significantly heat the electrons which can efficiently emit magnetobremstrahlung radiation. Because of this electron emission, the radiative efficiency of the ADAF is not small. We suggest that the small luminosities of nearby galactic black holes is due to outflows rather than ADAF accretion.Comment: 7 pages, 3 figures, Submitted to Ap

Хронический констриктивно-экссудативный перикардит у больного активным туберкулезом легкого; трудности диагностики

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Циркадианные изменения микрореологических свойств крови у больных хроническим бронхитом

Studies of circadian rhythmicity blood microrheological parameters (erythrocytes deformability and agregability) and relative plasma viscosity in COPD patients with different degree of respiratory insuffisiency and healthy subjects have been carried out. The presence of distinctive circadian rhythmicity of noted values changes both in patients and healthy subjects was determined. Microrheological values biological rhythm disorders creating critical situation for microcirculation at night and early morning hours in COPD patients grew progressively worse while intensifiing of respiratory insufficiency clinical manifestation.Проводили исследования циркадных ритмов (ЦР) микрореологических параметров крови (агрегантной способности и формы эритроцитов) у больных хроническим обструктивным бронхитом с различной степенью дыхательной недостаточности (ДН). Такие же исследования выполнили в группе здоровых лиц. Выявили наличие четких ЦР вышеозначенных параметров в обеих группах. По мере усиления ДН у больных хроническим обструктивным бронхитом увеличивались и выраженные расстройства микроциркуляции в ночные и ранние утренние часы

Динамика клинико-функциональных показателей системы дыхания у больных хронической обструктивной болезнью легких в комплексной реабилитации на курорте Белокуриха

The aim of the study was to estimate the dynamics of respiratory system clinicofunctional scores among patients with COPD at the health resort Belokhuriha. There were examined 188 cases of mild and middle-severe COPD. All the patients received different rehabilitation complexes in the conditions of health resort Belokuriha’s climate-recreational zone against the background of which there was conducted an estimation of the respiratory system clinicofunctional scores and depending on the applied methods there was evaluated its efficiency. In the process of the group rehabilitation where physical exercises were included there was recorded the dynamics of the main symptoms — decrease of the manifestation degree of dyspnea, cough, sputum discharge and scores of the respiratory system functional tests. OFV1 has reliably increased only in the group where clipping massage, exercises in the counter-resistance mode for the respiratory muscles and the terrainkur were used. The use of physical exercises in the rehabilitation of patients with COPD improves clinicofunctional scores of the respiratory system and its efficiency.Исследована динамика клинико-функциональных показателей системы дыхания у больных хронической обструктивной болезнью легких (ХОБЛ) при комплексной реабилитации на курорте Белокуриха. Обследовано 186 больных легкой и среднетяжелой ХОБЛ. Все пациенты получали различные комплексы в условиях климато-рекреационной зоны курорта Белокуриха, на фоне которых была проведена оценка клинико-функциональных показателей системы дыхания и эффективности реабилитации в зависимости от применяемых методов. В процессе реабилитации в группах, где в комплекс входили физические упражнения, отмечена положительная динамика основных симптомов — уменьшение степени выраженности одышки, кашля, отделения мокроты и показателей функциональных проб системы дыхания. Объем форсированного выдоха за первую секунду достоверно увеличился в группе, где дополнительно использовался клеппинг-массаж, упражнения в режиме встречного сопротивления для дыхательных мышц и терренкур. Применение в курортной реабилитации больных ХОБЛ физических упражнений улучшает клинико-функциональные показатели системы дыхания и повышает ее эффективность

Пневмония и плеврит как клинические маски тромбоэмболии легочной артерии при болезни Мондора

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Blue spectra and induced formation of primordial black holes

We investigate the statistical properties of primordial black hole (PBH) formation in the very early Universe. We show that the high level of inhomogeneity of the early Universe leads to the formation of the first generation PBHs. %The existence of these PBHs This causes later the appearance of a dust-like phase of the cosmological expansion. We discuss here a new mechanism for the second generation of PBH formation during the dust-like phase. This mechanism is based on the coagulation process. We demonstrate that the blue power spectrum of initial adiabatic perturbations after inflation leads to overproduction of primordial black holes with $10^9$g$\le M\le10^{15}$g if the power index is $n\ge1.2$.Comment: 16 pages, 2 figure