128 research outputs found
Effects of annealing silicon ion irradiated rib waveguides with respect to free carrier lifetime
No full textPreviously we have reported the effects of silicon ion irradiation on free carrier lifetime and propagation loss in silicon rib waveguides, and simulated net Raman gain based on experimental results. We further extend this work by reporting the effects of thermally treating a silicon irradiated sample with a higher dose and energy than previously reported, which produced a poor trade-off between free carrier lifetime and excess optical absorption prior to thermal treatment. Excess losses greater than 80dB/cm were recorded prior to annealing. After thermal treatment, the sample demonstrated characteristics of excess loss and free carrier lifetime recorded previously in much lower energy and dose silicon ion irradiated samples, suggesting that thermally treating samples could enhance the trade-off between free carrier lifetime and excess loss introduced to the rib waveguides. Raman gain simulations based on the new experimental data are reported and show an increase in net gain over previously reported data, suggesting that higher dose, shallow silicon ion implantation is the most efficient way of optimising the trade-off between lifetime reduction and excess optical absorption in silicon rib waveguides, a proposal in our earlier work. The effects of thermally treating low temperature oxide clad waveguides with respect to free carrier lifetime are also reported. Results show that thermally treating a low temperature oxide clad waveguide can vary the intrinsic lifetime. The results of this investigation as well as a discussion into the possible origin of the lifetime change are given.</p
The Disciples of A.R Kovalevsky: Yu.G. Litvinenko
No full textВ статье освещается жизнь и научное наследие Ю.Г. Литвиненко (1929-1990) -одного из ведущих украинских индологов, ученика выдающегося ориенталиста А.П. Ковалевскго. Научное наследие Ю.Г Литвинвнко условно разделено на четыре рубрики; 1) труды по истории рабочего движения в Британской Индии; 2) сочинения гю истории индийского коммунистического движения; 3) работы по истории национально-освободительного движения народов Индии: 4) индологические публикации в Украинской советской энциклопедии. Автор пришел к выводу, что хотя Ю.Г Литвиненко и не выдвинул фундаментальных концепций истории индийского рабочего и национально-освободительного движения, внес посильный вклад в становление и развитие украинской индологии.The life and scientific heritage of one of thB leading Ukrainian indologist, a disciple of the prominent orientalist A.P. Kovalevsky, Yu.G. Litvinenko (1929-1990). There are studied in the article Yu.G. Litvinenko’s scientific heritage is conditionally divided into four parts: 1) works from the history of the labour movement in the British India; 2) essays on the history of Indian communist movement; 3) studies on the history of national liberation movement of Indian peoples; 4) indological publications in the Ukrainian Soviet Encyclopedia. The author concluded that though Yu.G. Litvinenko has not promoted any fundamental conception of the history of the Indian labour and national liberation movement he had made certain contributions in rise and development of Ukrainian indology
The Disciples of A.R Kovalevsky: Yu.G. Litvinenko
No full textВ статье освещается жизнь и научное наследие Ю.Г. Литвиненко (1929-1990) -одного из ведущих украинских индологов, ученика выдающегося ориенталиста А.П. Ковалевскго. Научное наследие Ю.Г Литвинвнко условно разделено на четыре рубрики; 1) труды по истории рабочего движения в Британской Индии; 2) сочинения гю истории индийского коммунистического движения; 3) работы по истории национально-освободительного движения народов Индии: 4) индологические публикации в Украинской советской энциклопедии. Автор пришел к выводу, что хотя Ю.Г Литвиненко и не выдвинул фундаментальных концепций истории индийского рабочего и национально-освободительного движения, внес посильный вклад в становление и развитие украинской индологии.The life and scientific heritage of one of thB leading Ukrainian indologist, a disciple of the prominent orientalist A.P. Kovalevsky, Yu.G. Litvinenko (1929-1990). There are studied in the article Yu.G. Litvinenko’s scientific heritage is conditionally divided into four parts: 1) works from the history of the labour movement in the British India; 2) essays on the history of Indian communist movement; 3) studies on the history of national liberation movement of Indian peoples; 4) indological publications in the Ukrainian Soviet Encyclopedia. The author concluded that though Yu.G. Litvinenko has not promoted any fundamental conception of the history of the Indian labour and national liberation movement he had made certain contributions in rise and development of Ukrainian indology
THz nonlinear optics in silicon and germanium for third harmonic generation.
No full textThis thesis is concerned with the generation of terahertz (THz) light in the frequency range of 5–15 THz. This range is difficult to produce at high intensities, and no high-power table-top sources exist for it. The reasons for the interest in this frequency range are broad, and include communications, chemical and biomedical spectroscopy, etc. Different applications require highly specific technological characteristics, such as room temperature operation or very high stability, and satisfying all possible requirements in one generation mechanism is difficult. In this study, we sought to develop a solution to the problem of optical pumping of donor impurities in silicon, to control the orbit and spin of the donor electron in quantum computer gates. It is obvious that great advantages would be obtained if this control were possible with a bench-top source, and this is the key to enabling such high efficiency control to spread to the wider community of physicists and engineers working on spin qubits.
To achieve this purpose, we explore the possibility of use a cheap material like single doped silicon and germanium to triple THz radiation from 1.7 to 5 THz (which is available from Quantum Cascade Laser diodes). The presence of the dopants modifies substantially the optical properties of the semiconductors, generating large nonlinear coefficients at THz frequencies. Samples of bismuth doped silicon and phosphorus, arsenic and antimony doped germanium has been characterised using frequency-domain and time-domain spectroscopy, and finally the optical nonlinear coefficient of Si:Bi has been measure by a Four Wave Mixing (FWM) experiment. We have found that the nonlinear susceptibility of Si:Bi at resonance is the highest ever reported for a bulk material
Клинико-анатомические особенности иннервации почечных артерий у больных артериальной гипертензией = Clinical and anatomical features of innervation of the renal arteries in patients with arterial hypertension
No full textGarmazi S., Litvinenko M. A. Клинико-анатомические особенности иннервации почечных артерий у больных артериальной гипертензией = Clinical and anatomical features of innervation of the renal arteries in patients with arterial hypertension. Journal of Education, Health and Sport. 2016;6(2):293-300. eISSN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.46810
http://ojs.ukw.edu.pl/index.php/johs/article/view/3406
https://pbn.nauka.gov.pl/works/717684
The journal has had 7 points in Ministry of Science and Higher Education parametric evaluation. Part B item 755 (23.12.2015).
755 Journal of Education, Health and Sport eISSN 2391-8306 7
© The Author (s) 2016;
This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, Poland
Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium,
provided the original author(s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License
(http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial
use, distribution and reproduction in any medium, provided the work is properly cited.
The authors declare that there is no conflict of interests regarding the publication of this paper.
Received: 05.01.2016. Revised 12.02.2016. Accepted: 27.02.2016.
Клинико-анатомические особенности иннервации почечных артерий у больных артериальной гипертензией
Clinical and anatomical features of innervation of the renal arteries in patients with arterial hypertension
Гармази С., Литвиненко М. А.
Garmazi S., Litvinenko M. A.
Одесский национальный медицинский университет, г. Одесса, Украина
Odessa National Medical University, Odessa, Ukraine
Summary
Clinical and anatomical features of innervation of the renal arteries in patients with arterial hypertension
Garmazi S., Litvinenko M.A.
Odessa National Medical University, Odessa, Ukraine
The aim of this study was the clinical and anatomical features of innervation of the renal arteries.
The retrospective analysis of health statistics on the prevalence of resistant hypertension based on the Odessa Regional Mortem Bureau during 2011-2012 was conducted. The analysis of the results of the autopsy and subsequent histological examination of 30 bodies of deceased patients with resistant hypertension II and III stages has been done. The morphometry of renal arteries and their segments was conducted. Fragments of the renal artery were not larger than 1,0x1,0x1,0 cm, fixed in 10% neutral formalin and alcohol after standard wiring block embedded in paraffin. Sections 5.0-8.0 microns (in an amount of at least two sections with each block) were stained by the observation procedures recommended modern guidelines: hematoxylin and eosin, by Van Gieson; by Nissle, by Golgi and by Masson. The evaluation of the histological response rate in the vessels was performed visually and compared to the control group.
The greatest density of accumulation in the nerve ganglia determined adventitia proximal renal arteries, preferably on the frontal surface. Ganglions sizes ranging from 80 to 220 microns, larger than when the ganglia are located in the proximal renal artery. The main part of the sympathetic ganglia, located at a depth of 2-3 mm. Postbifurcation ganglia localization occurs in 32.2% of cases. The degree of fibrosis of the renal artery wall in hypertension does not preclude the implementation of radiofrequency catheter sympathectomy.
Key words: arterial hypertension, renal arteries, innervation, pathomorphology
Total Internal Reflection Optical Switch in SOI With Defect Engineered Barrier Region
No full textTotal internal reflection optical switches offer a switching operation which can be wavelength insensitive, thermally stable and polarisation independent. The implementation of such a switch based upon carrier injection in silicon is difficult due to the long diffusion lengths of injected free carriers. In this paper experimental results are presented which show that a reflective type switching operation is obtainable if a barrier formed of defective silicon is used to reduce free carrier diffusion.</p
Theoretical methods to the study of adaptation pupils to the educational environment in critical periods of development
No full textЛитвиненко Наталья Валерьевна, доктор психологических наук, профессор, заведующий кафедрой педагогики дошкольного и начального образования, Оренбургский государственный педагогический университет, г. Оренбург, [email protected]. Natalya V. Litvinenko, Doctor of Psychological Science, Professor, Head of department of Pedagogy of preschool and primary education, Orenburg State Pedagogical University, Orenburg, [email protected]На основе анализа научной литературы в статье констатируется, что в настоящее время имеет место экстенсивно-эмпирический путь развития проблемы адаптации школьников к образовательной среде, накопление, как правило, фрагментарных эмпирических данных и их описание. В связи с этим актуальным для педагогической психологии является методологическое согласование этих данных для обоснования теоретических подходов к исследованию адаптации школьников к образовательной среде в критические периоды развития. Осмысление знаний об адаптации, которые получены в комплексе наук о человеке, позволяют рассматривать ее как процесс взаимодействия личности и социальной среды, содействующий усвоению личностью общественных норм и ценностей, формированию отношения к ним, освоению способов деятельности и типов межличностных отношений и реализации личностного потенциала. Исходя из этого, обосновываются теоретические подходы к исследованию адаптации школьников к образовательной среде в критические периоды развития – антропологический, субъектный и системный подходы. В статье отмечается, что в совокупности данные подходы позволяют организовать изучение адаптационного процесса с учетом возрастно-типологической (социальная ситуация развития) и индивидуальной (личностные особенности) компонент психического развития ребенка и определить комплекс психологических факторов, условий успешности данного процесса, его внутриличностных детерминант. The author analysed scientific literature and made the conclusion in the article that now extensive-empirical way of development of the problem of the pupil's adaptation to educational environment exists in science. The accumulation of fragmental empirical facts and their description also take place. In connection with it the relevant problem of pedagogic psychology is the methodic concordance of these facts for substantiation of theoretical methods studying the pupil's adaptation to educational environment in different critical periods of development. The substantiation of the knowledge of the adaptation which was got by complex of sciences about the human being let to consider the adaptation to be the process of the interaction between the person and social environment. This process promotes the adoption of the social norms, values and the formation of the attitude to them, the adoption of the methods of activity and types of the interpersonal relations and the realization of the personal potential. In the article the author proves his choice of three methods: anthropological, systematic, subjective. And with their help the author investigates the adaptation of the pupils for the educational environment during the critical periods of development. These methods let the author to study the adaptation process with taking into account the two components of the child’s psychological development: the social situation of the development and the personal peculiarities. The author pointed the psychology factors, the conditions of the successful adaptation process and it’s inner personal determinants
Results of the treatment of the patients with malignant fibro histiocytoma of low limbs soft tissues
No full textLitvinenko O. O., Korovin S. I., Kutsenko L. B. Results of the treatment of the patients with malignant fibro histiocytoma of low limbs soft tissues. Journal of Education, Health and Sport. 2019;9(5):640-650. eISNN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.3257682
http://ojs.ukw.edu.pl/index.php/johs/article/view/7070
The journal has had 7 points in Ministry of Science and Higher Education parametric evaluation. Part B item 1223 (26/01/2017).
1223 Journal of Education, Health and Sport eISSN 2391-8306 7
© The Authors 2019;
This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, Poland
Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author (s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non commercial license Share alike.
(http://creativecommons.org/licenses/by-nc-sa/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
The authors declare that there is no conflict of interests regarding the publication of this paper.
Received: 29.04.2019. Revised: 15.05.2019. Accepted: 27.05.2019.
RESULTS OF THE TREATMENT OF THE PATIENTS WITH MALIGNANT FIBRO HISTIOCYTOMA OF LOW LIMBS SOFT TISSUES
O. O. Litvinenko, S. I. Korovin, L. B. Kutsenko
National Cancer Institute, Kyiv, Ukraine
Abstract
The basis of the research was the analysis of the results of treatment of 130 patients with malignant fibrous histiocytoma of limbs soft tissues. The patients were treated at the National Cancer Institute from 1985 to 2016. The analysis made showed that the overall survival rate of the patients under examination depends on the location of the primary tumor. Indicators of recurrence-free survival differ significantly depending on the localization of the tumor. In relapsing patients overall survival is different and depends on the method of treatment. In the course of the first six years, the indicators of overall survival are better in the patients underwent only surgical treatment. The overall survival rate for all patients with MFH depends on the treatment method.
Key words: malignant fibrous histiocytoma of soft tissues, general survival, recurrent-free survival, surgical, combined, and complex treatment
On the use of optoelectronic motion registration systems in biomechanical analysis of strike techniques
No full textKashuba Vitaliy, Litvinenko Yurii, Vako Ilia. On the use of optoelectronic motion registration systems in biomechanical analysis of strike techniques. Journal of Education, Health and Sport. 2017;7(3):939-948. eISSN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.4546285
http://ojs.ukw.edu.pl/index.php/johs/article/view/7848
The journal has had 7 points in Ministry of Science and Higher Education parametric evaluation. Part B item 1223 (26.01.2017).
1223 Journal of Education, Health and Sport eISSN 2391-8306 7
© The Author (s) 2017;
This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, Poland
Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium,
provided the original author(s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License
(http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted,
non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
The authors declare that there is no conflict of interests regarding the publication of this paper.
Received: 27.03.2017. Revised 28.03.2017. Accepted: 29.03.2017.
On the use of optoelectronic motion registration systems in biomechanical analysis of strike techniques
Vitaliy Kashuba, Yurii Litvinenko, Ilia Vako
National University of Ukraine on Physical Education and Sport Ukraine, Kyiv, Ukraine
Blak Sea National University named after Petro Mohyla, Nikolaev, Ukraine
Abstract
Topicality. Sports and technical skills, as an element of a holistic process of sports training, occupy one of the priority places in the overall structure of sports skills. The study, formation, improvement and development of the most rational models of sport technique are closely related to the use of modern video recording systems.
The task of the study is to analyse the knee strike technique, applied by the athletes of different qualifications with the help of "Qualisys" optoelectronic system.
Results of the research. Analysis of highly skilled athletes’ competitive activities shows that a knee strike is mainly used in close combat. Much less often such a strike can be put in a jump from a long or average distance. In our work, we have analysed the technique of right knee strike, performed from the starting position characteristic of close combat.
Conclusions. When studying the biokinematic structure of the knee strike technique, used by athletes of different qualification, differences in the dynamics of changes in the speed of the lower extremity joints on athlete’ impact side of were found, which indicates higher coordination of movements, performed by highly skilled athletes. Thus, regarding highly qualified athletes the peaks of the maximum speed of their ankle and knee joints coincide in time, contrary to the skilled athletes. The speed of the skilled athletes’ ankle and hip joints at certain times is higher than those of highly skilled. However, the maximum value of speed of the highly skilled athletes’ strike link, as a rule, is higher on average by 0.5 m ∙ s-1. The general patterns include the reduction of the resulting knee speed for athletes of different qualification at the time of strike performance in reference to the maximum values that precede the strike interaction.
Key words: strike technique; optoelectronic systems; video analysis
Розробка алгоритму для комп'ютерного моделювання напівмарковських гіпервипадкових процесів
No full textСтатья посвящена исследованию моделирования стохастических процессов, случайные величины которых не удовлетворяют условию статистической устойчивости. Исследуется возможность представления функции распределения гиперслучайной величины с помощью процесса усреднения. Предложен алгоритм аппроксимации усредненных кривых методами теории сплайнов. Рассматривается применение гиперслучайного подхода к моделированию процессов, описываемых полумарковскими моделями.Стаття присвячена дослідженню моделювання стохастичних процесів, випадкові величини яких не задовольняють умові статистичної стійкості. Досліджується можливість представлення функції розподілу гіпервипадкової величині за допомогою процесу усереднення. Запропоновано алгоритм апроксимації усереднених кривих методами теорії сплайнів. Розглядається застосування гіпервипадкового підходу до моделювання процесів, що описуються напівмарківськими моделями
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