Lidar investigations of M-zone

The creation of pulse dye lasers tuned to resonant line of meteor produced admixtures of atmospheric constituents has made it possible to begin lidar investigations of the vertical distribution of mesospheric sodium concentration and its dynamics in the upper atmosphere. The observed morning increase of sodium concentration in the vertical column is probably caused by diurnal variations of sporadic meteors. The study of the dynamics of the sodium column concentration in the period of meteor streams activity confirms the suggestion of cosmic origin of these atoms. The short lived increase of sodium concentration brought about by a meteor stream, however, exceeds by one order the level of the sporadic background

Analysis of Competitive Activity of Highly Skilled Athletes Specialized in Taekwondo at the XXX Olympic Games

В работе представлен анализ соревновательной деятельности высококвалифицированных спортсменов, специализирующихся в тхэквондо по видеоматериалам XXX игр Олимпиады. При анализе соревновательной деятельности велся подсчет общего количества наносимых ударов, а также учитывалось количество ударов для каждого приема. Анализ соревновательной деятельности свидетельствует об использовании спортсменами высокой квалификации на главных соревнованиях суженного спектра ударных действий ногами, нежели разрешенных правилами соревнований. Целесообразно отметить, что данная тенденция характерна для четвертьфинальных, полуфинальных и финальных поединков, где спортсмены, как правило, применяют хорошо заученные приемы и действия и довольно редко идут на риск, прибегая к выполнению более сложных в техническом плане или менее заученных ударных действий, что и определяет объем соревновательных технических действий атлета, который в большей или меньшей степени отличается от тренировочного объема. Установлено, что к наиболее распространенным ударам, выполняемым спортсменами высокой квалификации на состязаниях высшего уровня, являются удары сбоку, в частности доли-чхаги, еп-чхаги. С применением данных приемов зафиксированы нокдауны. Так, например, в суперлегкой весовой категории нокдаун проведен с использованием удара еп-чхаги, а в тяжелой категории – доли-чхаги. This paper presents an analysis of the competitive activity from the Olympics Games XXX video files of highly skilled athletes, who specialized in Taekwondo. In the analysis of competitive activity we counted the total number of attacked strikes, as well as the number of strikes for each technique. An analysis of competitive activity demonstrates that the highly skilled athletes use the despreading kick actions at major competitions than it was permitted by the competition rules. It is rational to note this trend is specific for the quarterfinal, semifinal and final contests, where fighters tend to use well-learned techniques and actions, and take risks rarely performing more complex strike actions in technical plan, or less memorized strike actions that defines the volume of athlete’s competitive technical actions, which is more or less different from the training volume. It was found that the most common strikes which have been performed by highly skilled athletes at the competitions of the highest level, were lateral strikes, in particular the dollyeo chagi, ap chagi. The knockdowns have been recorded with the use of these techniques. A knockdown was performed using ap chagi in light weight category, and dollyeo chagi in heavy weight categoryfor example

Theoretical-practical Aspects of use of Optical-electronic Systems of Movements Registration in the Biomechanical Analysis of Sports Technique

Спортивно-техническое мастерство как элемент целостного процесса спортивной подготовки занимает одно из приоритетных мест в общей структуре спортивного мастерства. Изучение, формирование, совер- шенствование и разработка наиболее рациональных образцов спортивной техники тесно связаны с использо- ванием современных систем видеорегистрации. Установлено, что в настоящее время не существует универ- сальной методики регистрации техники движений спортсменов. К наиболее распространённым следует отнести видеосъёмку, системы видеоанализа, в том числе работающие по принципу инфракрасного излучения камер, а также на основании работы инерционных датчиков. Использование систем видеорегистрации позво- ляет получить двух- или трёхмерные биомеханические характеристики, используемые при анализе спортивной техники. Sports-technical skill, as the element of sports preparation process, occupies one of priority places in the general structure of sports skill. Studying, formation, improvement and development of the most rational examples of sports technique is closely connected with use of modern video registration systems. It is established that now there is no universal method of athletes movements technique registration. Video filming, video analysis systems, including cameras of infrared radiation, and also cameras on the basis of inertial sensors operation, are the most widespread. Use of video registration systems allows receiving two- or the three-dimensional biomechanical characteristics used in the analysis of sports technique

Observations on the Productivity of Breeding Specimens of <i>Urtica dioica</i> L. from European Russian Ecotopes in Comparison with the Breeding Variety under Field Crop Conditions

Nettle is most often studied as a spinning plant, as a source of biochemicals and environmentally safe fungicides. Major studies are mostly conducted on natural samples and plant populations. Prospects for the use of plant biological resources of stinging nettle (Urtica dioica L.) from the Cretaceous south of the Central Russian Upland to create cultivars for a wide range of applications are considered. The aim of the study is to investigate the productivity of fresh weight and its biochemical composition in the variety of stinging nettle Avicenna, created on the basis of the initial material selected in the Belgorod region of Russia and patented in 2019, and new promising cultivars UD 32/06 and UD 12/16. The experiments were carried out by the split plot method with full randomization in four replicates. The cultivars UD 32/06 and UD 12/16 reliably surpass the Avicenna cultivar in the collection of fresh mass weight by 16.6–22.7% and 23.1 to 27.8%, dry weight by 11.4–28.7% and 1.9–32.7%, and seeds by 19.7–32.0% and 23.2–40.0% accordingly. Analysis of variance showed a significant effect of the factor “Cultivar” on the productive traits “Fresh weight yield” (strength influence 87.2%), “Dry weight yield” (strength influence 43.9%), and “Seed yield” (h2x = 61.6%). The content of crude protein in dry weight of the Avicenna and new varieties is 21.1–24.2%, crude fat: 2.5–4.2%, fiber: 12.0–14.8%. High content of ascorbic acid, calcium, phosphorus, iron, and zinc were observed in all material tested. It is concluded that the biological resources of the wild-growing forms of Urtica dioica L. from the European south of Russia are a valuable source material for obtaining varieties, and varieties with high productivity of the aboveground mass and stable seed productivity. The obtained research results prove the usefulness of nettle cultivation

Observations on the Productivity of Breeding Specimens of Urtica dioica L. from European Russian Ecotopes in Comparison with the Breeding Variety under Field Crop Conditions

Nettle is most often studied as a spinning plant, as a source of biochemicals and environmentally safe fungicides. Major studies are mostly conducted on natural samples and plant populations. Prospects for the use of plant biological resources of stinging nettle (Urtica dioica L.) from the Cretaceous south of the Central Russian Upland to create cultivars for a wide range of applications are considered. The aim of the study is to investigate the productivity of fresh weight and its biochemical composition in the variety of stinging nettle Avicenna, created on the basis of the initial material selected in the Belgorod region of Russia and patented in 2019, and new promising cultivars UD 32/06 and UD 12/16. The experiments were carried out by the split plot method with full randomization in four replicates. The cultivars UD 32/06 and UD 12/16 reliably surpass the Avicenna cultivar in the collection of fresh mass weight by 16.6&ndash;22.7% and 23.1 to 27.8%, dry weight by 11.4&ndash;28.7% and 1.9&ndash;32.7%, and seeds by 19.7&ndash;32.0% and 23.2&ndash;40.0% accordingly. Analysis of variance showed a significant effect of the factor &ldquo;Cultivar&rdquo; on the productive traits &ldquo;Fresh weight yield&rdquo; (strength influence 87.2%), &ldquo;Dry weight yield&rdquo; (strength influence 43.9%), and &ldquo;Seed yield&rdquo; (h2x = 61.6%). The content of crude protein in dry weight of the Avicenna and new varieties is 21.1&ndash;24.2%, crude fat: 2.5&ndash;4.2%, fiber: 12.0&ndash;14.8%. High content of ascorbic acid, calcium, phosphorus, iron, and zinc were observed in all material tested. It is concluded that the biological resources of the wild-growing forms of Urtica dioica L. from the European south of Russia are a valuable source material for obtaining varieties, and varieties with high productivity of the aboveground mass and stable seed productivity. The obtained research results prove the usefulness of nettle cultivation