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Bratislava, Slovakia

The Faculty of Mathematics, Physics and Informatics is one of the faculties of the Comenius University in Bratislava, the capital of Slovakia.The Faculty was created in 1980 by separating from the Faculty of Natural science, having the name Faculty of Mathematics and Physics . It was renamed to contemporary name in 2000.It provides university education in mathematics, physics and informatics as well as teacher training in subjects related to these branches of study.As a rule, in each of the mathematics, physics and computer science branches the first and the second year are common and from the third year students can choose different specializations.After five years of study the students can attain the Master of Science degree. There is also a bachelor branch of study. Wikipedia.

Klacka J.,Comenius University
Monthly Notices of the Royal Astronomical Society | Year: 2014

Properties of the solar wind are discussed and applied to the effect of the wind on motion of bodies in the Solar system. The velocity density function for the solar wind constituents is given by the κ-distribution. The relevant contributions to the solar wind action contain also the sputtering and reflection components in addition to direct impact. The solar wind effect is more important than the action of the solar electromagnetic radiation, as for the secular orbital evolution. The acceleration of a body under the action of the solar radiation, electromagnetic and corpuscular, is proportional to [1 - (1 + η1/Ō′pr)v · ̂r/c]̂r-(1 + η2/Ō′pr)v/c, approximately. Here, Ō′pr is the dimensionless efficiency factor of the radiation pressure, v is the body's velocity at the position vector r with respect to the Sun, c is the speed of light and η1 .= 1.1, η2 .= 1.4. The dimensionless cross-section the dust grain presents to wind pressure is about 4.7, while the conventional value is 1.0. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Source

Buc M.,Comenius University
Mediators of Inflammation | Year: 2013

Multiple sclerosis (MS) is an inflammatory disease in which the myelin sheaths around the axons of the brain and spinal cord are damaged, leading to demyelination and scarring as well as a broad spectrum of signs and symptoms. It is caused by an autoimmune response to self-antigens in a genetically susceptible individual induced by unknown environmental factors. Principal cells of the immune system that drive the immunopathological processes are T cells, especially of TH1 and TH17 subsets. However, in recent years, it was disclosed that regulatory T cells took part in, too. Subsequently, there was endeavour to develop ways how to re-establish their physiological functions. In this review, we describe known mechanisms of action, efficacy, and side-effects of contemporary and emerging MS immunotherapeutical agents on Treg cells and other cells of the immune system involved in the immunopathogenesis of the disease. Furthermore, we discuss how laboratory immunology can offer physicians its help in the diagnosis process and decisions what kind of biological therapy should be used. © 2013 Milan Buc. Source

Klacka J.,Comenius University
Monthly Notices of the Royal Astronomical Society | Year: 2013

Properties of the solar/stellar winds are discussed and applied to the effects of the winds on motion of dust particles in the Solar system and around stars. As for the secular orbital evolution of the spherical interplanetary dust particles, the solar electromagnetic radiation is 1.5-times more important than the solar corpuscular radiation, the solar wind. The relevant contributions of the solar wind action contain also the sputtering and reflection components in addition to direct impact. The importance of the wind can be partially increased by considering the decrease of dust particle mass due to the wind bombardment, and, mainly, due to the nonradial component of the solar wind velocity. Time dependence of the solar wind properties plays a less important role. The presented equation of motion of a dust particle under the action of the solar radiation respects reality in a much better way than the conventionally used equation. The dimensionless cross-section the dust grain presents to wind pressure is about 9/4. This value differs from the conventionally used value 1.0. The mass-loss rate of the zodiacal cloud is (7/3)-times higher than the currently accepted value, as for the micron-sized dust particles. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Source

Zemkova E.,Comenius University
Sports Medicine | Year: 2014

This review includes the latest findings based on experimental studies addressing sport-specific balance, an area of research that has grown dramatically in recent years. The main objectives of this work were to investigate the postural sway response to different forms of exercise under laboratory and sport-specific conditions, to examine how this effect can vary with expertise, and to provide examples of the association of impaired balance with sport performance and/or increasing risk of injury. In doing so, sports where body balance is one of the limiting factors of performance were analyzed. While there are no significant differences in postural stability between athletes of different specializations and physically active individuals during standing in a standard upright position (e.g., bipedal stance), they have a better ability to maintain balance in specific conditions (e.g., while standing on a narrow area of support). Differences in magnitude of balance impairment after specific exercises (rebound jumps, repeated rotations, etc.) and mainly in speed of its readjustment to baseline are also observed. Besides some evidence on an association of greater postural sway with the increasing risk of injuries, there are many myths related to the negative influence of impaired balance on sport performance. Though this may be true for shooting or archery, findings have shown that in many other sports, highly skilled athletes are able to perform successfully in spite of increased postural sway. These findings may contribute to better understanding of the postural control system under various performance requirements. It may provide useful knowledge for designing training programs for specific sports. © 2014 Springer International Publishing Switzerland. Source

This paper examines statistical and practical significance when interpreting outcomes of balance research studies. The analysis has been restricted to studies differing in groups of interest and types of balance training; however, using equal parameters of task-oriented balance tests. While large samples differed significantly, no significant differences were found between small groups of athletes of different specializations. Likewise, the values did not differ significantly during stance on injured and non-injured legs. Nevertheless, moderate to large effect sizes indicate that the data are particularly meaningful in terms of sport and rehabilitation practice. On the contrary, visual feedback balance training in school-age children showed highly statistically significant changes, though the effects were trivial. Some discrepancy was also found between statistically significant changes after balance training in untrained subjects and small to high effect sizes. However, statistical significance of different balance training programs in physically active individuals and competitive athletes corresponded with calculated effect sizes. These findings signify that frequently used statistical significance in balance research does not imply that changes observed after the training are practically meaningful, or vice versa. Therefore, both P values and effect sizes should be used when interpreting results of cross-sectional and intervention balance studies. © 2014 Springer International Publishing Switzerland. Source

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