The world is keeping pace with evolution in all its fields as a result of scientists' pursuit of continuous scientific and technological development. This evolution included the sports field, which had a large space in the aspect of development and for all disciplines, Therefore, it's reflected today in what we see of records and advanced achievements in sporting events and activities. The development in the field of sports was the result of scientific research (Hussein and Jawad., 2022), where the interest in the training process has become one of the most important pillars of the development of achievement (Neamah and Altay., 2020). The shooting sport has also witnessed a remarkable development due to the diversity and development of its teaching and training methods, in which the means of learning and training had to develop also in the stages of the shooting process. Thus, it became necessary to find new educational means to ensure the acceleration of shooter learning on the one hand. In addition to helping the trainee to reach the planned level, to facilitate the process of teaching the performance of the stages of the shooting process on the other hand. The development at the level requires the trainers to use applied sciences (Drwysh and Farida, 2017). Dry training for shooters is one of the appropriate educational methods for mastering all the technical, sensory, and motor elements of the shooters performance as it is an essential part of the learning and training process in shooting with air weapons without the use of ammunition. Dry training is one of the educational and training methods at the same time to master all the technical and sensory elements of the shooters' performance. This technique is not a substitute for direct training or direct throwing, it is an essential part of the air weapons training process in general and the air gun weapon in particular. That is, developing an ideal image of different positions of pistol or gun throwing and developing a mental image of the performance attitudes of the accuracy of correction. Accordingly, it is considered one of the training methods for learning the skills of shooting with air weapons, where the aids have an effective impact on the learning and training process. As well as its fundamental role in developing the skill side of the shooters. According to this modern trend, educational devices and aids are manufactured from raw materials available in the local environment at a low cost in order to develop the accuracy of correction in the air pistol for young female shooters. Accuracy is one of the main requirements in shooting (Khalid., 2019), as Researchers use many methods to find out the most important errors that occur when shooting with an air pistol. These errors included the most suitable for the shooting skill, which is the radial, constant, and variable error measures because most of the skills deal with accuracy mainly. The error measures are also adopted at present in order to be clear to the shooter and the coach in order to know the causes of the committed errors that result in poor performance. Hence the research's importance lies in developing a training program for dry training using aids to know the errors that occur at an accuracy of correction with an air gun and the extent of the shot deviation from the center of the target by means of error measures. The researchers aimed to reduce and treat performance errors and weaknesses as much as possible in order to raise the skill capabilities of the accuracy of correction with an air pistol.
In this work, metal oxide nanostructures, mainly copper oxide (CuO), nickel oxide (NiO), titanium dioxide (TiO2), and multilayer structure, were synthesized by the DC reactive magnetron sputtering technique. The effect of deposition time on the spectroscopic characteristics, as well as on the nanoparticle size, was determined. A long deposition time allows more metal atoms sputtered from the target to bond to oxygen atoms and form CuO, NiO, or TiO2 molecules deposited as thin films on glass substrates. The structural characteristics of the final samples showed high structural purity as no other compounds than CuO, NiO, and TiO2 were found in the final samples. Also, the prepared multilayer structures did not show new compounds other than th
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In this work, enhancement to the fluorescence characteristics of laser dye solutions hosting highly-pure titanium dioxide nanoparticles as random gain media. This was achieved by coating two opposite sides of the cells containing these media with nanostructured thin films of highly-pure titanium dioxide. Two laser dyes; Rhodamine B and Coumarin 102, were used to prepare solutions in hexanol and methanol, respectively, as hosts for the nanoparticles. The nanoparticles and thin films were prepared by dc reactive magnetron sputtering technique. The enhancement was observed by the narrowing of fluorescence linewidth as well as by increasing the fluorescence intensity. These parameters were compared to those of the dye only and the dye solution
... Show MoreThe CuInSe2 (CIS) nanocrystals are synthesized by arrested precipitation from molecular precursors are added to a hot solvent with organic cap- ping ligands to control nanocrystal formation and growth. CIS thin films deposited onto glass substrate by spray - coating, then selenized in Ar- atmosphere to form CIS thin films. PVs were made with power conversion efficiencies of 0.631% as -deposited and 0.846% after selenization, for Mo coated, under AM 1.5 illumination. X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) analysis it is evident that CIS have the chalcopyrite structure as the major phase with a preferred orientation along (112) direction and the atomic ratio of Cu : In : Se in the nanocrystals is nearly 1 : 1 : 2
In this study, the effect of fire flame on the punching shear strength of steel fiber reinforced concrete flat plates was experimentally investigated using nine half-scale specimens with dimensions of 1500×1500 mm and a total thickness of 100 mm. The main investigated variables comprised the steel fiber volume fraction 0, 1, and 1.5% and the burning steady state temperature 500 and 600 °C. The specimens were divided into three groups, each group consists of three specimens. The specimens in the first group were tested with no fire effect to be the reference specimens, while the others of the second and third groups were tested after being exposed to fire-flame effect. The adopted characteristics of the fire test were; (one hour) b
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Video streaming is widely available nowadays. Moreover, since the pandemic hit all across the globe, many people stayed home and used streaming services for news, education, and entertainment. However, when streaming in session, user Quality of Experience (QoE) is unsatisfied with the video content selection while streaming on smartphone devices. Users are often irritated by unpredictable video quality format displays on their smartphone devices. In this paper, we proposed a framework video selection scheme that targets to increase QoE user satisfaction. We used a video content selection algorithm to map the video selection that satisfies the user the most regarding streaming quality. Video Content Selection (VCS) are classified in
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Background: Lateral sinus augmentation and simultaneous insertion of dental implants is a highlypredictable procedure and associated with high rate of implants success.Aims: To evaluate implant stability changes following maxillary sinus augmentation utilizing deproteinizedbovine bone alone or mixed with platelet-rich fibrin.Materials and Methods: A total of 34 lateral sinus augmentation procedures were performed and 50 dentalimplants simultaneously installed. The lateral sinus augmentation cases were allocated randomly into 3groups: Group A comprised 13 procedures and 21 dental implants utilizing solely deproteinized bovine bone.Group B involved 10 cases and 16 dental implants using deproteinized bovine bone mixed with leukocyteand
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