190 research outputs found
PICES Press, Vol. 20, No. 1, Winter 2012
Get PDF•2011 PICES Science: A Note from the Science Board Chairman (pp. 1-6)
•2011 PICES Awards (pp. 7-9)
•Beyond the Terrible Disaster of the Great East Japan Earthquake (pp. 10-12)
•A New Era of PICES-ICES Scientific Cooperation (p. 13)
•New PICES Jellyfish Working Group Formed (pp. 14-15)
•PICES Working Group on North Pacific Climate Variability (pp. 16-18)
•Final U.S. GLOBEC Symposium and Celebration (pp. 19-25)
•2011 PICES Rapid Assessment Survey (pp. 26-29)
•Introduction to Rapid Assessment Survey Methodologies
for Detecting Non-indigenous Marine Species (pp. 30-31)
•The 7th International Conference on Marine Bioinvasions (pp. 32-33)
•NOWPAP/PICES/WESTPAC Training Course on
Remote Sensing Data Analysis (pp. 34-36)
•PICES-2011 Workshop on “Trends in Marine
Contaminants and their Effects in a Changing Ocean” (pp. 37-39)
•The State of the Western North Pacific in the First Half
of 2011 (pp. 40-42)
•Yeosu Symposium theme sessions (p. 42)
•The Bering Sea: Current Status and Recent Events (pp. 43-44)
•News of the Northeast Pacific Ocean (pp. 45-47)
•Recent and Upcoming PICES Publications (p. 47)
•New leadership for the PICES Fishery Science Committee (p. 48
Group Delay measurements of ultrabroadband pulses generated in highly nonlinear fibers
No full textUltra broadband supercontinuum pulses are commonly used as a source of different wavelengths from a wide spectral bandwidth or as a source of very short pulses. However the processes responsible for wide spectral broadening are still under investigation. In this paper we examine the temporal and spectral characteristics of the pulses broadened upon propagation in the highly nonlinear photonics crystal fibers with different dispersion profiles. Generated supercontinuum pulses were experimentally characterized using cross-correlation frequency resolved optical gating technique. Full Text: PDF ReferencesM. Bradler, P. Baum, and E. Riedle, "Femtosecond continuum generation in bulk laser host materials with sub-?J pump pulses", Appl. Phys. B 97, 561 (2009). CrossRef T. M. Kardas, B. Ratajska-Gadomska, W. Gadomski, A. Lapini, and R. Righini, "The role of stimulated Raman scattering in supercontinuum generation in bulk diamond", Opt. Express 21, 24201 (2013). CrossRef A. Brodeur and S. L. Chin, "Band-Gap Dependence of the Ultrafast White-Light Continuum", Phys. Rev. Lett. 80, 4406 (1998). CrossRef R. R. Alfano, ed., The Supercontinuum Laser Source: Fundamentals with Updated References, 2nd ed (Springer, 2006). DirectLink A. L. Gaeta, Phys. "Catastrophic Collapse of Ultrashort Pulses", Rev. Lett. 84, 3582 (2000). CrossRef J. M. Dudley, G. Genty, and S. Coen, "Supercontinuum generation in photonic crystal fiber", Rev. Mod. Phys. 78, 1135 (2006). CrossRef M. Klimczak, B. Siwicki, P. Skibinski, D. Pysz, R. Stepien, A. Heidt, C. Radzewicz, and R. Buczynski, "Coherent supercontinuum generation up to 2.3 ?m in all-solid soft-glass photonic crystal fibers with flat all-normal dispersion", Opt. Express 22, 18824 (2014). CrossRef D. J. Kane and R. Trebino, "Characterization of arbitrary femtosecond pulses using frequency-resolved optical gating", IEEE J. Quantum Electron. 29, 571 (1993). CrossRef J. Dudley, X. Gu, L. Xu, M. Kimmel, E. Zeek, P. O'Shea, R. Trebino, S. Coen, and R. Windeler, "Cross-correlation frequency resolved optical gating analysis of broadband continuum generation in photonic crystal fiber: simulations and experiments", Opt. Express 10, 1215 (2002). CrossRef N. Nishizawa and T. Goto, "Experimental analysis of ultrashort pulse propagation in optical fibers around zero-dispersion region using cross-correlation frequency resolved optical gating", Opt. Express 8, 328 (2001). CrossRef X. Gu, L. Xu, M. Kimmel, E. Zeek, P. O'Shea, A. P. Shreenath, R. Trebino, and R. S. Windeler, "Frequency-resolved optical gating and single-shot spectral measurements reveal fine structure in microstructure-fiber continuum", Opt. Lett. 27, 1174 (2002). CrossRef S. Roy, S. K. Bhadra, and G. P. Agrawal, "Effects of higher-order dispersion on resonant dispersive waves emitted by solitons", Opt. Lett. 34, 2072?2074 (2009). CrossRef S. Bose, S. Roy, R. Chattopadhyay, M. Pal, and S. K. Bhadra, "Experimental and theoretical study of red-shifted solitonic resonant radiation in photonic crystal fibers and generation of radiation seeded Raman soliton", J. Opt. 17, 105506 (2015). CrossRef T. Roger, M. F. Saleh, S. Roy, F. Biancalana, C. Li, and D. Faccio, "High-energy, shock-front-assisted resonant radiation in the normal dispersion regime", Phys. Rev. A 88, (2013). CrossRef G. P. Agrawal, Nonlinear Fiber Optics, Fifth edition (Elsevier/Academic Press, 2013). DirectLink J. Szczepanek, T. Kardas, M. Nejbauer, C. Radzewicz, and Y. Stepanenko, "Simple all-PM-fiber laser system seeded by an all-normal-dispersion oscillator mode-locked with a nonlinear optical loop mirror", Proc. SPIE 9728, 972827 (2016). CrossRef C. Iaconis and I. A. Walmsley, "Self-referencing spectral interferometry for measuring ultrashort optical pulses", IEEE J. Quantum Electron. 35, 501 (1999). CrossRef L. E. Hooper, P. J. Mosley, A. C. Muir, W. J. Wadsworth, and J. C. Knight, "Coherent supercontinuum generation in photonic crystal fiber with all-normal group velocity dispersion", Opt. Express 19, 4902 (2011). CrossRef J. Szczepanek, T. M. Kardas, and Y. Stepanenko, "Sub-160-fs pulses dechriped to its Fourier transform limit generated from the all-normal dispersion fiber oscillator", Optical Society of America Frontiers in Optics conference, FTu3C?2 (2016). CrossRef G. Genty, M. Lehtonen, and H. Ludvigsen, "Effect of cross-phase modulation on supercontinuum generated in microstructured fibers with sub-30 fs pulses", Opt. Express 12, 4614 (2004). CrossRef S. Roy, S. K. Bhadra, K. Saitoh, M. Koshiba, and G. P. Agrawal, "Dynamics of Raman soliton during supercontinuum generation near the zero-dispersion wavelength of optical fibers", Opt. Express 19, 10443 (2011). CrossRef Y. Liu, Y. Zhao, J. Lyngso, S. You, W. L. Wilson, H. Tu, and S. A. Boppart, "Suppressing Short-Term Polarization Noise and Related Spectral Decoherence in All-Normal Dispersion Fiber Supercontinuum Generation", J. Light. Technol. 33, 1814 (2015). CrossRef</jats:p
On the efficiency of a multiterawatt optical parametric amplifier: numerical model and optimization
No full textМУЗИЧНІ ЧАРІВНОСТІ М. СТЕПАНЕНКА В НАВЧАЛЬНОМУ ПРОЦЕСІ
Get PDFThe author considers features of musical language planistic M. Stepanenko\u27s products, use of the basic means of musical expressiveness for a complete reconstruction of figurative dramatic art of the musical text
Fractal dimension and variant anatomy of the white matter of the human cerebellar hemisperes
Get PDFMaryenko N. I., Stepanenko O. Yu. Fractal dimension and variant anatomy of the white matter of the human cerebellar hemisperes. Journal of Education, Health and Sport. 2017;7(3):457-465. eISSN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.399318
http://ojs.ukw.edu.pl/index.php/johs/article/view/4363
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: 21.03.2017. Revised 22.03.2017. Accepted: 23.03.2017.
FRACTAL DIMENSION AND VARIANT ANATOMY OF THE WHITE MATTER OF THE HUMAN CEREBELLAR HEMISPHERES
Natalya Ivanivna Maryenko, Olexander Yuriyovych Stepanenko
Kharkiv National Medical University,
Department of Histology, Cytology and Embryology, Kharkiv, Ukraine
Correspondence address: Ukraine, 61022, Kharkiv, Nauky Avenue, 4. Kharkiv National Medical University, Department of Histology, Cytology and Embryology
Abstract
Introduction. Morphological changes of the cerebellar lobules are found in many congenital and acquired diseases of the cerebellum, but the information on the normal structure of the cerebellar lobules do not take into account the peculiarities of individual anatomical variability, sex and age characteristics.
Aim – to investigate anatomical variability and fractal dimension of the white matter of the human cerebellar hemispheres.
Material and methods. The study involved 100 cerebella of people of both sexes, who died of causes unrelated to brain pathology (20–99 years old). Parasagittal sections of the cerebellar hemispheres were investigated.
Results. On parasagittal sections number of main branches of white matter is very varied and depends on peculiarities of structure of the hemispheric lobules. It was found that there is individual variability of the structure of the human cerebellar hemispheres, namely white matter branching features. We described variants of the branching of the main branches of white matter of the human cerebellar hemispheres.
Fractal dimension of the white matter was determined. The white matter of the cerebellum is typical quasi-fractal structure that can be objectively described using fractal dimension. Fractal index of the white matter of the cerebellar hemispheres varies from 1.119 to 1.519; average fractal index is 1.370. Fractal analysis can be used as an objective morphometric criterion for the diagnosis of various diseases of the cerebellum and other structures of the central nervous system.
Conclusions. Described variants of the cerebellar lobules and fractal dimension can be used as criteria for modern diagnostic imaging techniques for the diagnosis of various diseases of the CNS. The data can be used as the basis for atlases of serial sections of the cerebellum.
Key words: human, cerebellum, fractal dimension, white matter, anatomical variabilit
Features of preventive activity at the initial stage of training of many years standing of young basketball players
Get PDFFeatures of preventive activity at the initial stage of training of many years standing of young basketball players / S. Stroganov, K. Serhiyenko, O. Shynkaruk, N. Byshevets, L. Denysova, Y. Yukhno, O. Stepanenko, A. Ulan // Journal of Physical Education and Sport (JPES). - 2020. - Vol. 20 (Supp. iss. 1), аrt. 66. - Р. 452-455.The problem of injury to basketball players is very important today. Of particular importance, it acquires at the initial stage of training of many years standing for sportsmen, since young portsmen are the most vulnerable during periods of sensible development of the organism. This requires the improvement of preventive activities in the training of young basketball players. The purpose of the articleis a study of the features of preventive activity at the initial stage of training of many years standing of young basketball players. Results.The technology of prevention of disorders of the support-spring characteristics of the foot of young basketball players aimed at platypodia was presented.It is included: purpose, tasks, principles, orientation, stages of implementation and performance criteria,. The map of physical games was developed. These games are implemented at the preparatory stage of the annual cycle of training young athletes in basketball. There are specially developed methodological maps "Source of health of the foot". These maps corresponded to of theoretical material and in the form available for understanding of young sportsman. They offered a theoretical material and contained tasks for consolidating theoretical knowledge and practical implementation Complexes of physical exercises on an unstable support were developed. They provided for the use of a balancing platform “bosu”, at elastic and soft the support, as well as physical games aimed at preventing disorders of the support-spring characteristics of the foot. The use of the proposed technology contributed to the improvement of the indicators of support-spring characteristics of the foot and the resulting increase in the effectiveness of motor activity by young basketball players
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