Determining Best Window Size for an Improved Gabor Transform in EMG Signal Analysis

Electromyography EMG is a standout amongst the most regularly utilized tools to study human muscle condition. But due to the intricate attributes of the EMG itself, time-frequency distributions such as Gabor transform and spectrogram are more preferred than the simpler time distribution and frequency distribution. These techniques have been broadly utilized as it can provide both time and frequency information. However, both techniques have a fix window size for all frequency values, thus there exist a problem of determination of the window size, where excessively limit window and too wide window, will result in poor frequency resolution and time resolution, respectively. Along these lines, the point of this study is to choose the best window size so as to be utilized with Gabor transform to screen human muscle activity during core-lifting task. Four electrodes were placed on the right and left biceps brachii, and left and right erector spinae. In this study, the results of five acceptable window sizes (300, 400, 430, 450 and 520) were shown, despite the fact that other window sizes were also tested. Three criteria have been considered during the determination of the best window size, which are good time resolution, good frequency resolution, and high accuracy. Results demonstrate that window size of 450 is the best compared to others. As an additional analysis, the result is compared to a spectrogram and it can be seen that Gabor transform is better, as it has the flexibility in choosing the window size, thus affects the resolution and accuracy

Pulse Shape Discrimination in the IGEX Experiment

The IGEX experiment has been operating enriched germanium detectors in the Canfranc Underground Laboratory (Spain) in a search for the neutrinoless double decay of 76Ge. The implementation of Pulse Shape Discrimination techniques to reduce the radioactive background is described in detail. This analysis has been applied to a fraction of the IGEX data, leading to a rejection of ~60 % of their background, in the region of interest (from 2 to 2.5 MeV), down to ~0.09 c/(keV kg y).Comment: 18 pages, 10 figure

Charged rotating dilaton black branes in AdS universe

We present the metric for the $(n+1)$-dimensional charged rotating dilaton black branes with cylindrical or toroidal horizons in the background of anti-de Sitter spacetime. We find the suitable counterterm which removes the divergences of the action in the presence of the dilaton potential in all higher dimensions. We plot the Penrose diagrams of the spacetime and reveal that the spacetime geometry crucially modifies in the presence of the dilaton field. The conserved and thermodynamic quantities of the black branes are also computed.Comment: 13 pages, 3 figures, to appear in Gen. Relat. Gravi

Музичний супровід на тренуваннях як фактор оптимізації психофізіологічного стану юних регбістів 16-17 років.

to reveal the influence of the use of musical accompaniment in training on the psychophysiological functions of rugby players of 16-17 years of age. Material. Twenty rugby players from the sports club "KhTF" (16-17 years) took part in the study, 10 athletes entered the control group, 10 entered the experimental group. The experiment was carried out for two months during the preparatory period at the stage of specialized basic training. The experimental group was trained with musical accompaniment. At the beginning and at the end of the experiment, psychophysiological testing was conducted. The following tests were used: the parameters of a simple and complex reaction in various modes of signal feeding, indicators of efficiency and the nervous system were determined. Intergroup and intra-group differences in the tests were determined. Results. The construction of the training and training process in rugby with the musical accompaniment of the training sessions had a positive effect on the psychophysiological state of the athletes. In representatives of the experimental group in the "Response of choice, the number of errors" test, the result was significantly improved. After the experiment, the control and experimental groups became significantly different. Similar data were obtained in the tests "Response time of choice in the feedback mode" and "Mental stability according to the Schulte test". The obtained data testify to the advisability of using musical accompaniment in the training of young rugby players to optimize the psychophysiological state. Conclusions. The developed method of using musical accompaniment is an effective, accessible and reliable means of improving the psychophysiological state of 16-16-year-old rugby players. The use of musical accompaniment positively affects mental endurance, the reaction rate in various modes of signal delivery, stability and strength of the nervous system.Калиниченко В.Є., Козина Ж.Л., Ахмат М. Аяз, Полищук С.Б., Чуприна А.И., Серый А.В., Кольман О.Я., Иванова Г.В., Кудрявцев М.Д. Музыкальное сопровождение на тренировках как фактор оптимизации психофизиологического состояния юных регбистов 16-17 лет. Цель: выявить влияние применения музыкального сопровождения на тренировках на психофизиологические функции регбистов 16-17 лет. Материал. В исследовании приняли участие 20 регбистов из спортивного клуба «ХТЗ» (16-17 лет), 10 спортсменов вошли в контрольную группу, 10 в экспериментальную группы. Эксперимент проводился в течение двух месяцев в подготовительном периоде на этапе специализированной базовой подготовки. Экспериментальная группа тренировалась с музыкальным сопровождением. В начале и в конце эксперимента проводилось психофизиологическое тестирование. Применялись следующие тесты: определялись показатели простой и сложной реакции в различных режимах подачи сигналов, показатели работоспособности и нервной системы. Определялись межгрупповые и внутригрупповые различия по проведенным тестам. Результаты Построение учебно-тренировочного процесса в регби с применением музыкального сопровождения тренировочных занятий оказало положительное воздействие на психофизиологическое состояние атлетов. У представителей експермиентальнои группы в тесте «Реакция выбора, количество ошибок» результат достоверно улучшилось (р<0,05). После проведения эксперимента контрольная и экспериментальная группы стали достоверно отличаться между собой. Аналогичные данные были получены в тестах «Время реакции выбора в режиме обратной связи» и «Психическая устойчивость по тесту Шульте». Полученные данные свидетелствуют о целесообразности применения музыкального сопровождения на тренировках юных регбистов для оптимизации психофизиологичского состояния. Выводы. Разработанная методика применения музыкального сопровождения является эффективным, доступным и надежным средством улучшения психофизиологического состояния регбистов 16-17 лет. Применение музыкального сопровождения положительно влияет психическую выносливость, скорость реакции в различных режимах подачи сигнала, устойчивость и силу нервной системы.Калініченко В.Є., Козіна Ж.Л., Ахмат М. Аяз, Поліщук С.Б., Чуприна О.І.., Сірий О.В., Кольман О.Я., Іванова Г.В., Кудрявцев М.Д. Музичний супровід на тренуваннях як фактор оптимізації психофізіологічного стану юних регбістів 16-17 років. Мета: виявити вплив застосування музичного супроводу на тренуваннях на психофізіологічні функції регбістів 16-17 років. Матеріал. У дослідженні взяли участь 20 регбістів з спортивного клубу «ХТЗ» (16-17 років), 10 спортсменів увійшли в контрольну групу, 10 в експериментальну групи. Експеримент проводився протягом двох місяців в підготовчому періоді на етапі спеціалізованої базової підготовки. Експериментальна група тренувалася з музичним супроводом. На початку і в кінці експерименту проводилося психофізіологічне тестування. Застосовувалися наступні тести: визначалися показники простий і складної реакції в різних режимах подачі сигналів, показники працездатності і нервової системи. Визначалися міжгрупові і внутрішньогрупові відмінності по проведеним тестам. Результати. Побудова навчально-тренувального процесу в регбі із застосуванням музичного супроводу тренувальних занять зробило позитивний вплив на психофізіологічний стан атлетів. У представників експерміентальноі групи в тесті «Реакція вибору, кількість помилок» результат достовірно покращився (р <0,05). Після проведення експерименту контрольна і експериментальна групи стали достовірно відрізнятися між собою. Аналогічні дані були отримані в тестах «Час реакції вибору в режимі зворотного зв'язку» і «Психічна стійкість по тесту Шульте». Отримані дані свідетелствуют про доцільність застосування музичного супроводу на тренуваннях юних регбістів для оптимізації псіхофізіологічского стану. Висновки. Розроблена методика застосування музичного супроводу є ефективним, доступним і надійним засобом поліпшення психофізіологічного стану регбістів 16-17 років. Застосування музичного супроводу позитивно впливає психічну витривалість, швидкість реакції в різних режимах подачі сигналу, стійкість і силу нервової системи

Product-Group Unification in Type IIB String Thoery

The product-group unification is a model of unified theories, in which masslessness of the two Higgs doublets and absence of dimension-five proton decay are guaranteed by a symmetry. It is based on SU(5) x U(N) (N=2,3) gauge group. It is known that various features of the model are explained naturally, when it is embedded in a brane world. This article describes an idea of how to accommodate all the particles of the model in Type IIB brane world. The GUT-breaking sector is realized by a D3--D7 system, and chiral quarks and leptons arise from intersection of D7-branes. The D-brane configuration can be a geometric realization of the non-parallel family structure of quarks and leptons, an idea proposed to explain the large mixing angles observed in the neutrino oscillation. The tri-linear interaction of the next-to-minimal supersymmetric standard model is obtained naturally in some cases.Comment: 33 pages, 5 figure

Structural insights into the function of type VI secretion system TssA subunits.

The type VI secretion system (T6SS) is a multi-protein complex that injects bacterial effector proteins into target cells. It is composed of a cell membrane complex anchored to a contractile bacteriophage tail-like apparatus consisting of a sharpened tube that is ejected by the contraction of a sheath against a baseplate. We present structural and biochemical studies on TssA subunits from two different T6SSs that reveal radically different quaternary structures in comparison to the dodecameric E. coli TssA that arise from differences in their C-terminal sequences. Despite this, the different TssAs retain equivalent interactions with other components of the complex and position their highly conserved N-terminal ImpA_N domain at the same radius from the centre of the sheath as a result of their distinct domain architectures, which includes additional spacer domains and highly mobile interdomain linkers. Together, these variations allow these distinct TssAs to perform a similar function in the complex

Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results

Search for a W' boson decaying to a bottom quark and a top quark in pp collisions at sqrt(s) = 7 TeV

Results are presented from a search for a W' boson using a dataset corresponding to 5.0 inverse femtobarns of integrated luminosity collected during 2011 by the CMS experiment at the LHC in pp collisions at sqrt(s)=7 TeV. The W' boson is modeled as a heavy W boson, but different scenarios for the couplings to fermions are considered, involving both left-handed and right-handed chiral projections of the fermions, as well as an arbitrary mixture of the two. The search is performed in the decay channel W' to t b, leading to a final state signature with a single lepton (e, mu), missing transverse energy, and jets, at least one of which is tagged as a b-jet. A W' boson that couples to fermions with the same coupling constant as the W, but to the right-handed rather than left-handed chiral projections, is excluded for masses below 1.85 TeV at the 95% confidence level. For the first time using LHC data, constraints on the W' gauge coupling for a set of left- and right-handed coupling combinations have been placed. These results represent a significant improvement over previously published limits.Comment: Submitted to Physics Letters B. Replaced with version publishe