Comparision and characterization of Korean martial arts Taekwon-di ITF and Taekwondo WTF

Název: Komparace a charakteristika korejských bojových umění Taekwon-do ITF a Taekwondo WTF Cíle: V této práci bude zkoumána charakteristika sportovních disciplín, filozofie a závodního úspěchu českých závodníků Metody: Pro vypracování této diplomové práce byla použita rešeršně kompilační metoda, která byla použita pro sběr dat a informací o těchto dvou federací z české a zahraniční literatury. Výsledky: Bylo zjištěno, že Taekwon-do ITF je bojové umění, které se skládá z pěti sportovních disciplín a naši reprezentanti získali od roku 2000 na ME 237 medailí a na MS 61 medailí. Taekwondo WTF je především bojový sport, jehož hlavní disciplínou je Kyorugi (sportovní boj), ve které se soutěží na olympijských hrách. Naši reprezentanti v taekwondu WTF získali od roku 2000 na ME pouze 5 medailí. Klíčová slova: korejské bojové umění, Mezinárodní federace Taekwon-do, Světová federace TaekwondoTitle: Comparison and characterization of Korean martial arts Taekwon-do ITF and Taekwondo WTF Objectives: In this work will be examined charakteristic of sport disciplines, philosophy, success in competitions of czech competitiors Methods: For the development of this theses was used a method of gathering information of these two federations of Czech and foreign literature. Results: It was found that Taekwon-do ITF is a martial art, which consists five sport's disciplines and our representatives from year 2000 at european championships won 237 and at world championships won 61 medals. WTF Taekwondo is a combat sport and the main discipline is Kyorugi (sparring). Kyorugi is the Olympics. Our representatives in WTF Taekwondo from year 2000 won only 5 medals at european champinships. Keywords: Korean martial art, International Taekwon-do Federation, World Taekwondo FederationTechnické a úpolové sportyFaculty of Physical Education and SportFakulta tělesné výchovy a sport

Thermal degradation of alternative electrical insulating liquids

Diplomová práce se zaobírá teplotní degradací alternativních elektroizolačních kapalin. Teoretická část popisuje současný stav problematiky, elektroizolační kapaliny, jejich klasifikaci a druhy. Jsou zde popsány vlastnosti elektroizolačních kapalin, jejich modely stárnutí a také diagnostické metody podle příslušných norem. V praktické části jsou vybráni zástupci alternativních elektroizolačních kapalin a jsou stanoveny jejich dielektrické parametry v počátečním stavu. Podle naměřených hodnot je vybráno pět kandidátů, pro které je navrhnuta a provedena zrychlená degradační zkouška. V průběhu namáhání jsou sledovány dielektrické parametry vybraných olejů. Naměřené závislosti jsou matematicky aproximovány. V závěru jsou výsledky porovnány a fyzikálně interpretovány z pohledu oxidační stability.This thesis deals with alternative thermal degradation of electrical insulating liquids. The theoretical part describes the current state of the problem, electrical insulating liquids, their classification and types. There are described properties of electrical insulating liquids, their models of aging and diagnostic methods in accordance with the appropriate standards. In the practical part are chosen by representatives of alternative electrical insulating liquids and there are determined their dielectric characteristics in the initial state. According to the measured values is chosen five candidates for which it is designed and implemented an accelerated degradation test. During the test are measured dielectric parameters of the selected oils. Measured dependencies are mathematically approximated. In conclusion, the results are compared and physically interpreted in view of oxidation stability.

Antistatistic properties of materials in engineering practice

Bakalářská práce se zabývá vlastnostmi antistatických materiálů v technické praxi. V teoretické části je popsané matematicky a fyzikálně elektrické pole, princip elektrizace, triboelektrický jev, druhy elektrostatických výbojů, rozdělení antistatických materiálů a metody měření povrchové a vnitřní rezistivity. V praktické části je popsáno navrhnuté automatizované měřící pracoviště s Keithley 6517A a testovací komorou Keithley 8009, vytvoření aplikace v Agilent VEE Pro, měření povrchové a vnitřní rezistivity na komerčních materiálech a na materiálech s různou povrchovou úpravou, realizovanou katodovým naprašováním a zařazení materiálů do jednotlivých skupin.The bachelor thesis deals with the properties of antistatic materials in engineering practice. The theoretical part described mathematically and physically electric field, the principle of electrification, triboelectric effect, types of electrostatic discharges, types of antitatic materials and methods of measurement surface and volume resistivity. In the practical part is designed the automated measuring workplace with electrometer Keithley 6517 and with the test chamber Keithley 8009, creating an application in Agilent VEE Pro, measurement of surface and volume resistivity on commercial materials and materials with various surface finishes, realized by cathode sputtering and the inclusion of materials in each group.

LIGHTWEIGHT UHPC FACADE PANEL WITH LED DISPLAY

This article deals with the development of lightweight UHPC facade panel which also can serve as an LED display. Combining both functions into one gives the potential ability to create a LED display on the facade of the building. The article describes the experiences of the development and production of a small-format prototype facade panel, including the installation of LEDs and their electrical connection. The result of the research is the prototype of a 16mm thick small-format lightweight facade panel with a LED display for displaying text on two parallel lines. Thanks to the waffle lightening, the total material and weight savings are approximately 58% compared with the full cross section

Diagnostics Of Isometric And Isokinetic Strength In Junior Elite Tennis Players Within The Context Of Muscular Disbalances

This research aims to determine the strength level of muscle groups in wrist and forearm and to assess lateral differences in junior tennis player group (TEN, n = 10, aged 12–14) and a control group of boys who do not perform any sport activity (CS, n=10, aged12–14) by isometric (hand dynamometer GRIP-D TKK 5401, Takei, Japan) and isokinetic dynamometry (dynamometer Humac Norm CSMI, Stoughton, USA) methods. Diagnostics of concentric extension and flexion was carried out in concordance with Ellenbecker methodology (1991) in angular velocities of 90°/s and 300°/s, results are given in Newton metres (Nm). Data analysis proved substantive insignificant differences between TEN and CS group as long as age, body height and weight are concerned. Isometric dynamometry: using Cohen’s d there were proved substantially significant differences in the strength of dominant extremity in favour of TEN group (d = 0.76) and lateral difference in strength level of right and left upper extremity in TEN group TEN (d = 0.60). Isokinetic dynamometry: in angular velocity of 90°/s were proved substantially significant differences between TEN and CS group in the strength of extensors (d = 1.16) and flexors of right wrist (d = 1.33) as well as in extensors (d = 0.83) and flexors (d = 0.99) of left wrist in favour of TEN group. Similarly, there was proved substantially significant lateral difference in strength level of wrist flexors of right and left hand (d = 0.84). In angular velocity of 300°/s there were proved substantially significant differences between TEN and CS group in favour of TEN group, both in right wrist extensors (d = 0.94) and flexors (d = 1.39). Substantially significant differences in favour of TEN group have been proved also in non dominant upper extremity, both in left wrist extensors (d = 1.27) and flexors (d = 1.12). Neither in TEN nor CS group were proved substantially significant lateral differences in strength of wrist extensors and flexors – with the exception of lateral differences between extensors (d = 0.62) in CS group. Values obtained by assessment of extensors and flexors strength ratio in both TEN and CS groups in both angular velocities signal an increased risk of injury incidence in all cases. From conclusions described above, it is obvious that long-term game and training load significantly increases the level of maximal strength in junior elite tennis players in comparison with the group of their peers who do not perform any sport activity.This research aims to determine the strength level of muscle groups in the wrist and forearm and to assess the lateral differences in a junior tennis player group (TEN, n = 10, aged 12–14) and a control group of boys who do not perform any sport activity (CS, n=10, aged12–14). The method used was by isometric (hand dynamometer GRIP-D TKK 5401, Takei, Japan) and isokinetic dynamometry (dynamometer Humac Norm CSMI, Stoughton, USA). Diagnostics of concentric extension and flexion were carried out in concordance with Ellenbecker methodology (1991) in angular velocities of 90°/s and 300°/s, results are given in Newton metres (Nm). Data analysis proved substantive insignificant differences between TEN and CS group as long as age, body height and weight are concerned. Isometric dynamometry: using Cohen’s d there were proven substantially significant differences in the strength of dominant extremity in favour of the TEN group (d = 0.76) along with a lateral difference in strength level of the right and left upper extremity in TEN group TEN (d = 0.60). Isokinetic dynamometry: in angular velocity of 90°/s revealed substantially significant differences between the TEN and CS group in the strength of extensors (d = 1.16) and flexors of right wrist (d = 1.33) as well as in extensors (d = 0.83) and flexors (d = 0.99) of left wrist particularly in favour of TEN group. Similarly, substantially significant lateral difference in strength level of wrist flexors of right and left hand (d = 0.84) were shown. In angular velocity of 300°/s there was a substantially significant difference between TEN and CS group in favour of the TEN group, both in right wrist extensors (d = 0.94) and flexors (d = 1.39). Substantially significant differences shown in the TEN group have been proved but also in the non-dominant upper extremity, both in left wrist extensors (d = 1.27) and flexors (d = 1.12). Neither group revealed substantially significant lateral differences in strength of wrist extensors and flexors – with the exception of lateral differences between extensors (d = 0.62) in CS group. Values obtained by assessment of extensors and flexors strength ratio in both TEN and CS groups in both angular velocities signal an increased risk of injury incidence in all cases. From the conclusions described above, it is obvious that long-term game and training load significantly increases the level of maximal strength in junior elite tennis players in comparison with the peer group who do not perform any sport activity

Transfer of Muscle Strength Between Single-Joint and Multi-Joint Exercises for Lower Limbs

Most strength and conditioning coaches deal with the question of how to supplement specific exercises, or which non-specific exercises would be the most suitable for achieving a set purpose. This study aims to assess strength transfer with a focus on the lower limbs projected from a selected strength intervention program (the right leg exercises only single-joint exercises: leg extension on machine and leg curl; the left leg exercises only multi-joint exercises: deadlift and leg press) to the force of the knee joint flexors and extensors during eccentric and concentric contractions. In one training session, the participants repeated every exercise five times in four series. The load intensity was around 90% of 1RM and was increased by 5% after the first and the fifth week. The rest interval was always three minutes long. For the left lower limb, the highest transfer (0.20) was from the leg press to the knee joint extensor at the eccentric contraction and from the deadlift was the highest transfer (0.19) to the knee joint extensor at the eccentric contraction. For the right lower limb, the highest transfer (0.53) was from the leg extension on a machine to the knee joint flexor at the concentric contraction and from the lying leg curl was the highest transfer (0.47) to the knee joint flexor at the concentric contraction

Strength values of shoulder internal and external rotators in junior tennis players

Character of modern tennis game in the last decade has become significantly more dynamic, fast and powerful, which brings high strain to joint and muscular system. The aim of this research was to establish strength level of external and internal shoulder rotators, and to compare the competitive tennis players group of boys (TEN, n=10, aged 12-14 years) and boys who did not perform any sport activity at competitive level (CS, n=10, aged 12-14 years) as well as to assess lateral differences in both groups. Using isokinetic dynamometry method (Humac Norm CSMI Stoughton, MA, USA), we tested strength level of external and internal shoulder rotators (180°/s, 300°/s). The TEN and CS group are comparable from the aspects of age, body height and body weight. Comparison of isokinetic strength values in TEN and CS groups proved significantly higher strength level of external and internal rotators in both (dominant and non-dominant) extremities for the TEN group. The lateral difference assessment proved the insignificant difference in external and significant difference in internal rotators in the TEN group, and the insignificant difference in both the external and internal rotators in the CS group. A lower strength level was found in the internal rotators in comparison with the external rotators in both groups (for both the dominant and non-dominant extremity), whereas in the TEN group lower differences between the external and internal rotators of the dominant extremity were proved. Although researches on adult highly skilled tennis players refer to a higher strength level of the upper extremity internal rotators, this fact has not been pronounced in the TEN group. An ideal external/internal rotators̕ ratio in adult players is considered within the interval of 66 75%. Significantly higher values obtained in the TEN group might be attributed to lower age and also lower performance level. It can be said that the level of isokinetic strength in the TEN the group is significantly higher than in the CS group, due to the influence of long-term game and training load

Analysis Of The Level Of Anthropometric And Strength Characteristics Of Male And Female Players Aged 11–12

Problematikou významu silových schopností ve sportu a v tenisu se zabývá mnoho autorů, v tenisu se síla projevuje především v razanci úderů, rychlosti podání a lokomoci pohybu. Cílem příspěvku je analýza úrovně základních antropometrických a silových charakteristik tenistů a tenistek, posouzení intersexuálních rozdílů a zjištění míry závislosti mezi antropometrickými a silovými charakteristikami. Výzkumný soubor je tvořen českými tenisty (n = 221) a tenistkami (n = 193) ve věku 11,0-12,9 let. Výzkumná data byla získána v letech 200-2010 pomocí testové baterie TENDIAG 1. Analýza výzkumných dat prokázala, že pocházejí z normálního rozložení. Úroveň základních antropometrických a silových proměnných je vyjádřena pomocí základních statistických charakteristik pro jednotlivé proměnné: soubor tenistů (n = 221, tělesná výška: V = 155,10 ± 7,62, hmotnost: H = 43,50 ± 6,68, maximální síla herní ruky: MS = 25,14 ± 4,59, relativní síla herní ruky: RS = 0,58 ± 0,09), soubor tenistek (n = 193, tělesná výška: V = 154,60 ± 6,94, hmotnost: H = 43,49 ± 7,17, maximální síla herní ruky: MS = 23,08 ± 4,61, relativní síla herní ruky: RS = 0,53 ± 0,09). Věcná významnost intersexuálních rozdílů byla posouzena pomocí Cohenova d, věcně významné rozdíly byly prokázány pouze v případě RS (d = 0,56, střední efekt) a MS (d = 0,45, nízký efekt). Věcně významná závislost byla u souboru tenistů prokázána mezi V a H (r = 0,71, r2 = 0,50; střední efekt), dále mezi V a MS (r = 0,59, r2 = 0,35; střední efekt) a mezi H a MS (r = 0,59, r2 = 0,35, střední efekt). U souboru tenistek byla prokázána věcně významná závislost mezi V a H (r = 0,75, r2 = 0,56; střední efekt), dále mezi H a MS (r = 0,64, r2 = 0,41, střední efekt) a rovněž mezi maximální a relativní silou (r = 0,58, r2 = 0,34; střední efekt).The issues of the significance of strength capabilities in sport and tennis are dealt with by many authors. In tennis, the strength of the playing arm primarily manifests in the speed of strokes, serve and locomotion movement. The goal of this paper is the analysis of basic anthropometric and strength levels of male and female players and to compare and evaluate inter-gender differences of anthropometric and strength characteristics. The research sample consisted of Czech junior male tennis players (n = 221) and female players (n = 193) in the ages between 11.0 and 12.9 years. The data for this research was gathered during 2000-2010 period by regular testing using a test battery TENDIAG 1. Analysis of acquired data showed normal distribution characteristics. The values measured were; anthropometric and strength levels statistic characteristic variables in the set of male tennis players (n = 221, body height: H = 155.10 ± 7.62, body weight: W = 43.50 ± 6.68, strength of playing hand: SH = 25.14 ± 4.59, relative strength of playing hand: RS = 0.58 ± 0.09) and female tennis players (n = 193, body height: H = 154.60 ± 6.94, body weight: W = 43.49 ± 7.71, maximum strength of playing hand: SH = 23.08 ± 4.61, relative strength of playing hand RS = 0.53 ± 0.09). Inter-gender differences between male and female tennis players were assessed using Cohen’s d values, substantial significant differences in mean values between male and female players were detected but only in the relative strength of gaming hand (d = 0.56, mean effect) and maximum strength level of game hand (d = 0.45, low effect). The size of effect was significant in the sample tennis players demonstrated between H and W (r = 0.71, r2  = 0.50; mean effect), among H and MS (r = 0.59, r 2  = 0.35; mean effect) and between MS and W (r = 0.59, r 2  = 0.35, mean effect). In a group of female tennis players has been demonstrated size of effect relation between H and W (r = 0.75, r 2  = 0.56; mean effect), among W and MS (r = 0.64, r 2  = 0.41, mean effect) and also between the maximum and the relative strength (r = 0.58, r 2  = 0.34; mean effect)