Polarization Properties of the "Photon Pistol"

The deterministic single-photon emission by means of STIRAP through the atoms with degenerate levels is studied. The expression for the polarization matrix of the emitted photon is obtained and its dependence on the polarization of the driving laser field and on the initial atomic state is examined.Comment: 13 pages, 3 figure

Single-photon emission via Raman scattering from the levels with partially resolved hyperfine structure

The probability of emission of a single photon via Raman scattering of laser pulse on the three-level $\Lambda$ - type atom in microcavity is studied. The duration of the pulse is considered to be short enough, so that the hyperfine structure of the upper level remains totally unresolved, while that of the lower level is totally resolved. The coherent laser pulse is assumed to be in resonance with the transition between one hyperfine structure component of the lower atomic level and all hyperfine structure components of the upper level, while the quantized cavity field is assumed to be in resonance with the transition between the other hyperfine structure component of the lower level and all components of the upper one. The dependence of the photon emission probability on the mutual orientation of polarization vectors of the cavity mode and of the coherent laser pulse is analyzed. Particularly, the case is investigated, when the total electronic angular momentum of the lower atomic level equals 1/2, which is true for the ground states of alkali atoms employed in the experiments on deterministic single photon emission. It is shown, that in this case the probability of photon emission equals zero for collinear polarizations of the photon and of the laser pulse, and the probability obtains its maximum value, when the angle between their polarizations equals 60 degrees.Comment: 5 pages, 3 figure

Автотранспорт Харьковщины: современное состояние и проблемы развития

В статье рассматриваются особенности развития автодорожного транспорта в Харьковской области. Проанализированы основные показатели, определяющие его работу как важнейшей составляющей производственной инфраструктуры региона. Определены характерные региональные проблемы. The article deals with features of the development of road transport in the Kharkiv region. We analyze the main parameters that define his work as an essential component of the industrial infrastructure of the region. The characteristic regional issues

Проницаемость геодинамических зон в пределах поля шахты «Брянковская»

Выполнено геодинамическое картирование в пределах поля ликвидированной шахты «Брянковская». Оценена активность и проницаемость геодинамических зон и их влияние на формирование эколого-гидрогеологической обстановки. Geodynamic mapping has been executed within the limits of “Bryankovskaya” closed mine field. Activity and penetrability for dynamic areas and their influence on the formation of ecological and hydrogeological environment have been estimated

ХРОНИЧЕСКИЕ ЯТРОГЕННЫЕ РИНОСИНУСИТЫ ПРИ ПРОВЕДЕНИИ ТРАНССКУЛОВОЙ ИМПЛАНТАЦИИ

Adstract: The use of zygomatic implantation protocols allows rehabilitating patients with severe atrophy and resorption of the jaws, after inflammatory processes of the maxillofacial region, polytrauma of the middle third of the face, resections of the jaws for the removal of neoplasms. The main complication in the long-term period is chronic rhinosinusitis. Complex treatment of chronic, iatrogenic rhinosinusitis is a complex, topical, interdisciplinary problem for specialists working in the field of head and neck.Применение протоколов трансскуловой имплантации позволяет реабилитировать пациентов, при выраженной атрофии и резорбции челюстей, после воспалительных процессов челюстно-лицевой области, политравме средней трети лица, резекциях челюстей по поводу удаления новообразований. Основное осложнение в отдаленном периоде хронические риносинуситы. Комплексное лечение хронических, ятрогенных риносинуситов представляет собой актуальную, междисциплинарную задачу для специалистов, работающих в области головы и шеи

Effectiveness of the Sequential Use of Plastic and Titanium Implants for Experimental Replacement of the Mandibular Defect in Animals Using Preliminary Digital Design

Abstract: Using the templates preliminarily made by 3D design and prototyping methods, defects in the lateral area of the lower jaw of sheep were created using the piezosurgical technique. The defects were replaced by plastic implants obtained by the method of layer-by-layer fusion of the FDM printing–fusing deposition modeling and fixation with titanium screws to the jaw body. In the time interval, plastic implants are replaced by titanium implants obtained by selective laser sintering (SLS) using a 3D printer. To study the processes of reparative osteogenesis, microsamples of tissues of the preimplantation zone were analyzed. As a result, signs of osteo- and fibro-osseointegration were identified. The obtained data are regarded as a prerequisite for further clinical trials of the developed protocols for the sequential replacement of jaw defects using 3D printing. © 2021, Pleiades Publishing, Ltd

Проницаемость геодинамических зон в пределах поля шахты «Брянковская»

Выполнено геодинамическое картирование в пределах поля ликвидированной шахты «Брянковская». Оценена активность и проницаемость геодинамических зон и их влияние на формирование эколого-гидрогеологической обстановки. Geodynamic mapping has been executed within the limits of “Bryankovskaya” closed mine field. Activity and penetrability for dynamic areas and their influence on the formation of ecological and hydrogeological environment have been estimated

Автотранспорт Харьковщины: современное состояние и проблемы развития

В статье рассматриваются особенности развития автодорожного транспорта в Харьковской области. Проанализированы основные показатели, определяющие его работу как важнейшей составляющей производственной инфраструктуры региона. Определены характерные региональные проблемы. The article deals with features of the development of road transport in the Kharkiv region. We analyze the main parameters that define his work as an essential component of the industrial infrastructure of the region. The characteristic regional issues