Vol. 7, No.1, 2017
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UNIVERSITY OF PRISTINA-FACULTY OF SCIENCES KOSOVSKA MITROVICA-REPUBLIC OF SERBIA VOL. 7, No 1, 2017. _______________________________________________________________________ ISSN 1450-7226 (Print) ISSN 2560-3094 (Online) UNIVERSITY OF PRISTINA-FACULTY OF SCIENCES KOSOVSKA MITROVICA-REPUBLIC OF SERBIA UNIVERSITY THOUGHT-PUBLICATION IN NATURAL SCIENCES Aims and Scope The University Thought - Publication in Natural Sciences (Univ. thought, Publ. nat. sci.) is a scientific journal founded in 1994. by the University of Priština, and was published semi annually until 1998. Today, the University Thought - Publication in Natural Sciences is an international, peer reviewed, Open Access journal, published semi annually in the online and print version by the University of Priština, temporarily settled in Kosovska Mitrovica, Serbia. The Journal publishes articles on all aspects of research in Biology, Chemistry, Geography, Information technologies, Mathematics and Physics in the form of original papers, short communications and reviews (invited) by authors from the country and abroad. The University Thought - Publication in Natural Sciences serves as an interdisciplinary forum covering a wide range of topics for a truly international audience. Journal is endeavor of the University of Priština to acquaint the scientific world with its achievements and wish to affirm the intellectual potential and natural resources of own region. Our aim is to put forward attitude of principle that science is universal and we invite all scientists to cooperate wherever their scope of research may be. We are convinced that shall contribute to do victory of science over barriers of all kinds erected throughout the Balkans. Director Srećko P. Milačić, PhD, Serbia Editor in Chief Nebojša V. Živić, PhD, Serbia Deputy Editor in Chief Vidoslav S. Dekić, PhD, Serbia Associate Editors Ljubiša Kočinac, PhD, Serbia, Ranko Simonović, PhD, Serbia, Stefan Panić, PhD, Serbia, Branko Drljača, PhD, Serbia, Aleksandar Valjarević, PhD, Serbia Editorial Board Gordan Karaman, PhD, Montenegro, Gerhard Tarmann, PhD, Austria, Predrag Jakšić, PhD, Serbia, Slavica Petović, PhD, Montenegro, Momir Paunović, PhD, Serbia, Bojan Mitić, PhD, Serbia, Stevo Najman, PhD, Serbia, Zorica Svirčev, PhD, Serbia, Ranko Simonović, PhD, Serbia, Miloš Đuran, PhD, Serbia, Radosav Palić, PhD, Serbia, Snežana Mitić, PhD, Serbia, Slobodan Marković, PhD, Serbia, Milivoj Gavrilov, PhD, Serbia, Jelena Golijanin, PhD, Bosnia and Herzegovina, Dragoljub Sekulović, PhD, Serbia, Dragica Živković, PhD, Serbia, Stefan Panić, PhD, Serbia, Petros Bithas, PhD, Greece, Zoran Hadzi-Velkov, PhD, The Former Yugoslav Republic Of Macedonia, Ivo Kostić, PhD, Montenegro, Petar Spalević, PhD, Serbia, Marko Petković, PhD, Serbia, Gradimir Milovanovic, PhD, Serbia, Ljubiša Kočinac, PhD, Serbia, Ekrem Savas, PhD, Turkey, Zoran Ognjanović, PhD, Serbia, Donco Dimovski, PhD, The Former Yugoslav Republic Of Macedonia, Nikita Šekutkovski, PhD, The Former Yugoslav Republic Of Macedonia, Leonid Chubarov, PhD, Russian Federation, Žarko Pavićević, PhD, Montenegro, Miloš Arsenović, PhD, Serbia, Svetislav Savović, PhD, Serbia, Slavoljub Mijović, PhD, Montenegro, Saša Kočinac, PhD, Serbia Technical Secretary Danijel B. Đošić, Serbia Editorial Office Ive Lola Ribara 29; 38220, Kosovska Mitrovica, Serbia, e-mail: [email protected], [email protected], [email protected]; fax: +381 28 425 397 Available Online This journal is available online. Please visit http://www.utnsjournal.pr.ac.rs to search and download published articles. UNIVERSITY THOUGHT-PUBLICATION IN NATURAL SCIENCES Vol. 7, No 1, 2017. CONTENTS BIOLOGY Biljana Vitošević THE CIRCADIAN CLOCK AND HUMAN ATHLETIC PERFORMANCE ………………………………....... 1 Predrag Jakšić CAVE MOTH AND BUTTERFLY FAUNA (Insecta: Lepidoptera) OF SERBIA: CURRENT STATE AND FUTURE PROSPECTS ……….……………………............................................................................................. 8 CHEMISTRY Nenad S. Drašković, Dejan M. Gurešić SYNTHESIS AND SPECTROSCOPIC CHARACTERIZATION OF LITHIUM SALTS OF COPPER(II) AND NICKEL(II) COMPLEXES WITH 1,3-PROPANEDIAMINE-N,N,N’,N’-TETRAACETATE ..…….......……. 13 Ljiljana M. Babincev, Dejan M. Gurešić, Ranko M. Simonović DEVELOPMENT AND APPLICATION OF POTENTIOMETRIC STRIPPING ANALYSIS ..………...……17 GEOGRAPHY Miroslav Stanković, Stefan Milovanović GAM MODEL AND TOURIST VALORIZATION OF GEOSITES PLOČNIK …………………………....… 24 INFORMATION TECHNOLOGIES Aleksandar Marković, Stefan Panić, Branimir Jakšić, Petar Spalević, Marko Smilić ANALISYS OF THE INFLUENCE OF COMMUNICATION PARAMETERS OF FSO CHANNELS ON THE RECEPTION QUALITY ……………………………………...………………………………………………... 32 Branimir Jakšić, Ivana Milošević, Mile Petrović, Siniša Ilić, Slobodan Bojanić, Selena Vasić CHARACTERISTICS OF HYBRID BROADCAST BROADBAND TELEVISION (HBBTV) …..……......... 36 MATHEMATICS Milena Petrović, Nataša Kontrec, Stefan Panić DETERMINATION OF ACCELERATED FACTORS IN GRADIENT DESCENT ITERATIONS BASED ON TAYLOR’S SERIES …….…………………………………………………………………………………….... 41 PHYSICS Milan S. Dimitrijević, Sylvie Sahal-Bréchot ON THE STARK BROADENING OF Ar VII SPECTRAL LINES ….......…………...………….……………. 46 Ljiljana Gulan AN ANALYSIS OF FACTORS AFFECTING THE HIGH RADON CONCENTRATION IN DIFFERENT TYPES OF HOUSES .……………………………… ……………………………………………………..….... 51 UNIVERSITY THOUGHT doi:10.5937/univtho7-13650 Publication in Natural Sciences, Vol. 7, No. 1, 2017, pp. 1-7. Review Paper THE CIRCADIAN CLOCK AND HUMAN ATHLETIC PERFORMANCE BILJANA VITOŠEVIĆ1* 1Faculty of Sport and Physical Education, Leposavić, University of Priština, Kosovska Mitrovica, Serbia ABSTRACT The importance of circadian clock in managing of key muscle physiological processes, and therefore the impact on athletic performance is well studied. Specifically chronobiology examines the mechanisms of the biological clock and the consequences of disrupting its rhythm. Although a body of literature indicates that the peak performance of notable indicators of athletic performance exerts mainly in the afternoon and evening hours which is attributed to increased temperature of the body, certain variables such as vigilance, alertness and cognitive domains can influence the shift of the peak performance during the day. In addition, athletes face issues of desynchronization of their circadian rhythm during frequent transcontinental travels, since their performance is reduced and the adjustment of the biological clock requires some recommendations in the training process and behavioral approach. This review focuses on some current studies on endogenous and exogenous factors which affect the circadian rhythm in order to achieve better sport results, evaluation of the impact chronotype through chronometric tests and revising more valuable determinants of sport performance, as well as the application of new mathematical models in individual treatment of recovery of athletes in the phase of resynchronization. Keywords: circadian clock, chronobiology, athletic performance, circadian disruption. and thus can regulate circadian rhythms. Light as the leading INTRODUCTION zeitgeber, in addition to transmission along retinal-hypothalamic That the man is indeed a part of nature and in a harmonious tract, also affects a number of other physiological rhythms, relationship with it, indicating the fact that although the including plasma cortisol and plasma melatonin, which like its biological rhythms are endogenous, they are adjusted to external precursor serotonin plays an important role in the regulation of stimuli. It has long been recognized that the circadian rhythm sleep (Carrier & Monk, 2001). In addition to brightness, the regulates many physiological processes, like secretion of timing of nutrition, physical activity and some social and hormones, sleep-wake cycle, body temperature and activity psychological factors are also considered as zeitgebers and patterns. The term circadian rhythm is of Latin origin and means through the main biological clock, affect the peripheral fluctuations set for a period of about 24 hours, or more precisely oscillators that regulate many important physiological functions 24.5, which are synchronized with the cycle of light in the of metabolism. As the "gold standard" or key biological marker environment (Brown et al., 2005). That internal generator of of human circadian rhythm is considered the temperature of the rhythms, called "biological clock" is located in the body which raises a number of physiological rhythms that suprachiasmatic nucleus (SCN) of the hypothalamus, which manage an important metabolic variables (Wever, 1979). directly receives the information about light and the darkness The science that studies the mechanisms of biological through retinal-hypothalamic fibers. Information obtained from clocks as well as the potential consequences of disrupting this the outside are processed and through a central circadian clock system is referred to as chronobiology. A key component of this sent to the other peripheral clocks of various tissues and cells transdisciplinary science is the biological rhythm which is whose work can be aligned or may be autonomous. The characterized by its frequency, period length, amplitude circadian synthesis and secretion of melatonin by the pineal (acrophase-peak, mesor-mean and nadir-trough), as well as the gland is generated in the SCN and entrained primarily by the phase (phase advance- shift to an earlier time or phase delay- light-dark cycle (Cajochen et al., 2003). The molecular shift