Saberfighting as a tool of the sports rehabilitation

Одной из проблем современности является дефицит двигательной активности. Направление артистического фехтования – Саберфайтинг (СФ) позволяет компенсировать недостаток двигательной активности. Благодаря своей низкой травматичности СФ доступен для любого человека с любым уровнем физической подготовки. СФ может быть применен для физической реабилитации инвалидов. Так же СФ может быть рекомендован для лиц, освобожденных от занятий физвоспитаниемDeficiency of the motorial activity is one of the modern time problems. Saber-fighting(SF) as a direction of the artistic fencing allows to compensate the deficiency of the motorical activity. Due to its low injury threat, SF is available to any people with any level of the physical training. SF can be applied for the rehabilitation of the invalids. Also, SF can be recommended for the people that are “free” from physical trainin

Radioactive contamination of ZnWO4 crystal scintillators

The radioactive contamination of ZnWO4 crystal scintillators has been measured deep underground at the Gran Sasso National Laboratory (LNGS) of the INFN in Italy with a total exposure 3197 kg x h. Monte Carlo simulation, time-amplitude and pulse-shape analyses of the data have been applied to estimate the radioactive contamination of the ZnWO4 samples. One of the ZnWO4 crystals has also been tested by ultra-low background gamma spectrometry. The radioactive contaminations of the ZnWO4 samples do not exceed 0.002 -- 0.8 mBq/kg (depending on the radionuclide), the total alpha activity is in the range: 0.2 - 2 mBq/kg. Particular radioactivity, beta active 65Zn and alpha active 180W, has been detected. The effect of the re-crystallization on the radiopurity of the ZnWO4 crystal has been studied. The radioactive contamination of samples of the ceramic details of the set-ups used in the crystals growth has been checked by low background gamma spectrometry. A project scheme on further improvement of the radiopurity level of the ZnWO4 crystal scintillators is briefly addressed.Comment: 15 pages, 8 figures, 6 tables, submitted for publicatio

Построение минимаксных ансамблей апериодических кодов Голда

Introduction. Signals constructed on the basis of ensembles of code sequences are widely used in digital communication systems. During development of such systems, the most attention is paid to analysis, synthesis and implementation of periodic signal ensembles. Theoretic methods for synthesis of periodic signal ensembles are developed and are in use. Considerably fewer results are received regarding construction of aperiodic signal ensembles with given properties. Theoretical methods for synthesis of such ensembles are practically nonexistent.Aim. To construct aperiodic Gold code ensembles with the best ratios of code length to ensemble volume among the most known binary codes.Materials and methods. Methods of directed search and discrete choice of the best ensemble based on unconditional preference criteria are used.Results. Full and truncated aperiodic Gold code ensembles with given length and ensemble volume were constructed. Parameters and shape of auto- and mutual correlation functions were shown for a number of constructed ensembles. Comparison of the paper results with known results for periodic Gold code ensembles has been conducted regarding growth of minimax correlation function values depending on code length and ensemble volume.Conclusion. The developed algorithms, unlike the known ones, make it possible to form both complete ensembles and ensembles taking into account the limitation of their volume. In addition, the algorithms can be extended to the tasks of forming ensembles from other families, for example, assembled from code sequences belonging to different families.Введение. В системах цифровой связи широко применяются сигналы, построенные на основе ансамблей кодовых последовательностей. При разработке этих систем наибольшее внимание уделяется анализу, синтезу и реализации ансамблей периодических сигналов. Разработаны и используются теоретические методики синтеза ансамблей периодических сигналов. Значительно меньше результатов получено в области построения ансамблей апериодических сигналов с заданными корреляционными свойствами. Теоретические методики синтеза таких ансамблей сигналов практически отсутствуют.Цель работы. Построение минимаксных ансамблей апериодических кодов Голда, которые обладают одним из лучших среди известных бинарных кодов соотношением длины кодов и объема ансамбля.Материалы и методы. Для построения минимаксного ансамбля используются направленный перебор и метод дискретного выбора лучшего ансамбля на основе безусловного критерия предпочтения.Результаты. В статье описан алгоритм формирования полных и неполных минимаксных ансамблей апериодических кодов Голда с заданными длиной и объемом ансамбля. Приведены параметры и вид авто- и взаимнокорреляционных функций для ряда полученных ансамблей. Выполнено сравнение результатов статьи с известными результатами для ансамблей периодических кодов Голда в части роста минимаксных значений корреляционных функций в зависимости от длины кодов и объема ансамблей.Заключение. Разработанные алгоритмы, в отличие от известных, позволяют конструировать как полные ансамбли, так и ансамбли, учитывающие ограничение их объема. Кроме того, данные алгоритмы могут быть распространены на задачи построения ансамблей из других семейств, например, собранных из кодовых последовательностей, принадлежащих различным семействам

Formation of Minimax Ensembles of Aperiodic Gold Codes

Introduction. Signals constructed on the basis of ensembles of code sequences are widely used in digital communication systems. During development of such systems, the most attention is paid to analysis, synthesis and implementation of periodic signal ensembles. Theoretic methods for synthesis of periodic signal ensembles are developed and are in use. Considerably fewer results are received regarding construction of aperiodic signal ensembles with given properties. Theoretical methods for synthesis of such ensembles are practically nonexistent.Aim. To construct aperiodic Gold code ensembles with the best ratios of code length to ensemble volume among the most known binary codes.Materials and methods. Methods of directed search and discrete choice of the best ensemble based on unconditional preference criteria are used.Results. Full and truncated aperiodic Gold code ensembles with given length and ensemble volume were constructed. Parameters and shape of auto- and mutual correlation functions were shown for a number of constructed ensembles. Comparison of the paper results with known results for periodic Gold code ensembles has been conducted regarding growth of minimax correlation function values depending on code length and ensemble volume.Conclusion. The developed algorithms, unlike the known ones, make it possible to form both complete ensembles and ensembles taking into account the limitation of their volume. In addition, the algorithms can be extended to the tasks of forming ensembles from other families, for example, assembled from code sequences belonging to different families

Radiopurity of ZnWO4ZnWO_4 Crystal Scintillators

Recently $ZnWO_4$ was proposed as perspective material for low-counting experiments to search for rare processes. Such experiments demand high radiopurity of $ZnWO_4$ crystal scintillators. With this aim radioactive contamination of large volume (0.1-0.7 kg) $ZnWO_4$ crystal scintillators were measured in the underground Laboratori Nazionali del Gran Sasso of the INFN at the depth of ≈ 3600 m water equivalent