In soccer robot contests, generally soccer robots can recognize their own team robots through color detection using the HSV model. Robots that use color detection to identify their own team robot can detect objects that have the same color value, so objects that have the same color will be considered as their own team robot. However, if you only rely on this method, it is still lacking when viewed in terms of object tracking. Haar like feature or known as Haar Cascade Classifier is a rectangular (square) feature method, which gives a specific indication of an image. This method is able to detect quickly and in real time. Therefore, the researchers tried to unite these two detections to be able to produce a better detection system than before. It is hoped that hoped that in this study, researchers can provide input for the Robotics team of Dinamika Bangsa University in improving the accuracy of robot detection against robots in the same team. From the results of the study it was found that the detection of objects with a distance from the camera as far as 100 cm to 150 cm was successfully carried out, but with a distance of more than 150 cm the object was not detected.
Physical education is an integral part of the entire educational process through selected physical activities to develop and improve three domains, namely: cognitive, affective, and psychomotor. PJOK learning is learning that is more than just teaching knowledge from a teacher to students, more than that in this learning process an educator is expected to be able to optimize the potential that exists in students. One solution that can be applied so that the learning process can continue is to carry out the learning process through online media. This research method uses descriptive qualitative research, descriptive research is a research conducted with the main objective to provide an overview or description of a situation objectively. Data collection in this study was carried out by collecting articles, information, or from books. Data collection in this study was carried out by downloading articles and journals related to it. Based on the research that has been done, the effectiveness of PJOK learning on the basic technique of passing down the volleyball game through online media for class VIII students of SMP Widya Sakti Denpasar is said to be effective when viewed from the values of assignments and students' practice. From the attitude of the teacher in the learning process, the teacher has been very maximal in providing material to students. but the teacher has not found a solution so that students become better for online learning without the obstacles of facilities and infrastructure that exist in each student's home.
In the game of tennis there are many factors that must be mastered by the players, because when viewed from the movement, the sport of tennis is a tough sport, so to be able to play tennis properly and be able to maintain the shape of the game there are several basic factors that a tennis player needs to have. This research is a descriptive qualitative research by describing and analyzing service in tennis coaching through biomechanical and kinesiological aspects. The steps taken are articles, data reduction, data analysis, data compilation, and drawing conclusions. Article preparation is done by collecting articles from various online sources with relevant topics. This research is a collaborative research that is practical based on the problems that occur in the development of tennis sports. Thus it can be said that a coach or sports coach must be able to establish good communication and be able to give an appropriate assessment of what is being done and what has been done and be able to provide feedback. Recognizing the importance of the role of a coach in the achievement of athletes, a coach must work professionally.
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