ANALYSIS OF TRAINING METHOD OF TAEKWONDO ATHLETES WITH REACTION BALL

ABSTRACT Introduction: Brief introduction: Taekwondo is a sport that integrates explosive power and reaction speed. The reaction speed of the athletes has a direct bearing on the result of the competition. Objective: To improve the reaction time effect of athletes. Methods: Forty-one Taekwondo team athletes were selected as the research subjects. Then, the training methods were introduced, and special technology using an emg tester and a synchronous camera system was implemented to analyze the earliest emg signals and the moment of the hit, the time from signal emergence to the emg reaction for reaction time, and from signal emergence to hit for the total time. Results: The average score of the 41 athletes before the test was 0.282673,with standard deviation of 0.0377349 and standard error of 0.0058932. The average score, standard deviation, and standard error of the 41 athletes after small training were 0.28217, 0.037744 and 0.005895. Conclusions: From the test results of the three training modes, the small training mode had a significant impact on the reaction time of Taekwondo athletes, while the medium and large training modes did not have significant effects. The results show that a small amount of training is best and plays a significant role in improving the reaction of an athlete. Level of evidence II; Therapeutic studies - investigation of treatment results.

Effects of Stellate Ganglion Block Through Different Approaches Under Guidance of Ultrasound

ObjectiveThis study aimed to investigate the effects of stellate ganglion block (SGB) through different approaches under guidance of ultrasound.MethodsA total of 130 patients undergoing SGB in our hospital between February 2019 and February 2020 were enrolled as the research subjects. According to the random number table method, these subjects were divided into two groups: a modified 6th cervical vertebra (C6) group (n = 65) and a 7th cervical vertebra (C7) group (n = 65). Under the guidance of ultrasound, the subjects in the modified C6 group were punctured at the level of the C6 transverse process, and the subjects in the C7 group were punctured at the level of the C7 transverse process. The operation duration, number of puncture angle adjustments, block effects, and adverse reactions for SGB were compared between the two groups.ResultsThe modified C6 group showed shorter SGB operation duration and a lower number of puncture angle adjustments than the C7 group, and the differences were statistically significant (P < 0.05). Horner Syndrome occurred in both groups after SGB. The incidence of adverse reactions in the modified C6 group was 4.62%, comprising 1 case of hoarseness and 2 cases of slowed pulse, while that in the C7 group was 6.15%, with 1 case of hoarseness and 3 cases of slowed pulse; the difference between the two groups was not statistically significant (P > 0.05).ConclusionThe operation duration for modified SGB guided by ultrasound puncturing at the C6 transverse process is shorter and requires fewer puncture angle adjustments than puncturing at the C7 transverse process; however, there is no significant difference between the incidence of adverse reactions or the blocking effects of the two methods.

Moral psychology from the lab to the wild: Relief registries as a paradigm for studying real-world altruism

Experimental psychology’s recent shift toward low-effort, high-volume methods (e.g.,self-reports, online studies) and away from the more effortful study of naturalistic behavior raises concerns about the ecological validity of findings from these fields, concerns that have become particularly apparent in the field of moral psychology. To help address these concerns, we introduce a paradigm allowing researchers to investigate an important, widespread form of altruistic behavior – charitable donations – in a manner balancing competing concerns about internal validity, ecological validity, and ease of implementation: relief registries, which leverage existing online gift registry platforms to allow research subjects to choose among highly neededdonation items to ship directly to charitable organizations. Here, we demonstrate the use of relief registries in two experiments exploring the ecological validity of the finding from our own research that people are more willing to help others after having imagined themselves doing so. In this way, we sought to provide a blueprint for researchers seeking to enhance the ecological validity of their own research in a narrow sense (i.e., by using the relief registry paradigm we introduce) and in broader terms by adapting paradigms that take advantage of modern technology to directly impact others’ lives outside the lab.

The Characteristics of Mathematical Literacy Based on Students’ Executive Function

<p style="text-align: justify;">Literacy ability is an individual's ability to reason, formulate, solve, and interpret mathematically to solve problems related to daily life. Executive function is a cognitive aspect that has a relation with mathematical literacy. One of some aspects that affects the low mathematical literacy ability is the aspect of executive function. This study aims to investigate the characteristics of mathematical literacy based on the executive function aspects of 15 years old students. A qualitative method with a descriptive approach is employed in this study. The present research applies interview guidelines, questionnaires, and students' mathematical literacy tests as the instruments. Research subjects are junior high school students in grade VIII from two different schools. The result shows that the students' executive function influences mathematical literacy ability. Students' mathematical literacy ability is not fully achieved by fulfilling all the indicators involved. Another aspect found in the research is the low critical thinking ability impacts the achievement of mathematical literacy ability indicators.</p>

Correlation Self-Efficacy and Adversity Quotient of Students at SMK Muhammadiyah 2 Wedi Klaten

This study aims to determine whether there is a correlation between self-efficacy and adversity quotient for students of SMK Muhammadiyah 2 Wedi Klaten. This type of research uses quantitative research methods with a correlational approach. Sampling methods using simple random sampling with data collection techniques in the form of a scale. The research subjects were 70 students from class XI of SMK Muhammadiyah 2 Wedi, Klaten. The results obtained correlation analysis (rxy) of 0.708 with a p-value 0.000 that is lower than 0.05, meaning that there is a significant positive correlation between self-efficacy and the student's adversity quotient. This can indicate that the higher the student's self-efficacy, higher the adversity quotient of the student, then Ho is rejected and Ha is accepted. Self efficacy and adversity quotient in students of SMK Muhammadiyah 2 Wedi, Klaten are classified as moderate. The coefficient of determination (R2) of the correlation is 0.724, meaning that self-efficacy contributes effectively to the adversity quotient by 72%, which means there are 28% of the other factors that affect students adversity quotient

Activist Learners’ Creative Thinking Processes in Posing and Solving Geometry Problem

<p style="text-align: justify;">This study aimed to describe the creative thinking process of students with active learning styles in proposing and solving problems on geometry material. The research instruments were Honey and Mumford's Learning Style Questionnaire (LSQ), problem-solving and submission test sheets, and interview guidelines. The LSQ questionnaire was distributed to students majoring in mathematics education at a university in Malang, Indonesia, with a total of 200 students. Students who have an active learning style and meet the specified criteria will be selected as research subjects. Based on research on creative thinking processes in proposing and solving problems in students with active learning styles, it was found that there were differences in behaviour between subject 1 and subject 2 at each stage of creative thinking. However, based on the researcher's observations of the behaviour of the two subjects at each stage of their thinking, there are similarities in behaviour, namely, they tend to be in a hurry to do something, prefer trial and error, and get ideas based on daily experience.</p>

The Development of Interactive E-Book of Local History for Senior High School in Improving Local Wisdom and Digital Literacy

<p style="text-align: justify;">This study discusses students’ responses and perceptions on the e-book of Local History of West Java (Indonesia) developed by the researchers. It uses a Research and Development approach and experimental method. Data collection techniques used in this study are observation, interviews, and focus group discussions with interactive model data analysis. The research subjects were students and teachers of high schools in West Java. They were taken as the subjects as they can represent the region. The History E-book is, however, published on ebooksejarah.id page while the system was developed by using SDLC (Software Development Life Cycle) Waterfall model. The results of the study indicate that the components of the e-book on the aspects of the materials, presentation, and completeness are overall suitable to be used by students. The materials are considered to be still inapplicable and not contextual. Further, they are still lack of latest issues as well as photos/illustrations. The study of student responses on the e-book reinforces that the zoomers (those belong to Generation Z) prefer to digital learning media because their social life belongs to the online world. Local history e-books should better adapt to the learning style of Generation Z, who prefer visuals and hands-on experiences to reading texts. Thus, e-book development needs to be equipped with various learning media in short audios and video explainers, animations, and infographics.</p>

Intelligent Algorithm-Based Multislice Spiral Computed Tomography to Diagnose Coronary Heart Disease

In this study, dictionary learning and expectation maximization reconstruction (DLEM) was combined to denoise 64-slice spiral CT images, and results of coronary angiography (CAG) were used as standard to evaluate its clinical value in diagnosing coronary artery diseases. 120 patients with coronary heart disease (CHD) confirmed by CAG examination were retrospectively selected as the research subjects. According to the random number table method, the patients were divided into two groups: the control group was diagnosed by conventional 64-slice spiral CT images, and the observation group was diagnosed by 64-slice spiral CT images based on the DLEM algorithm, with 60 cases in both groups. With CAG examination results as the standard, the diagnostic effects of the two CT examination methods were compared. The results showed that when the number of iterations of maximum likelihood expectation maximization (MLEM) algorithm reached 50, the root mean square error (RMSE) and peak signal to noise ratio (PSNR) values were similar to the results obtained by the DLEM algorithm under a number of iterations of 10 when the RMSE and PSNR values were 18.9121 dB and 74.9911 dB, respectively. In the observation group, 28.33% (17/60) images were of grade 4 or above before processing; after processing, it was 70% (42/60), significantly higher than the proportion of high image quality before processing. The overall diagnostic consistency, sensitivity, specificity, and accuracy (88.33%, 86.67%, 80%, and 85%) of the observation group were better than those in the control group (60.46%, 62.5%, 58.33%, and 61.66%). In conclusion, the DLEM algorithm has good denoising effect on 64-slice spiral CT images, which significantly improves the accuracy in the diagnosis of coronary artery stenosis and has good clinical diagnostic value and is worth promoting.

PENGGUNAAN METODE JIGSAW UNTUK MENINGKATKAN PRESTASI BELAJAR SISWA PADA MATERI MEDAN MAGNET KELAS IX SMPN 10 MALANG

The purpose of this study was to determine the impact and implementation of the jigsaw method in learning science (Physics) subjects to improve student achievement in class IX of SMP Negeri 10 Malang, Malang City. The method used in this research is classroom action research (CAR). While the data collection techniques used were observation, interviews, documentation and descriptive data analysis. This research was conducted in 3 cycles, namely cycle I, cycle II and cycle III. The research subjects were 34 grade IX students of SMP Negeri 10 Malang in the 2016/2017 academic year. After doing research in class IX SMP Negeri 10 Malang, student learning outcomes using the jigsaw model learning method, can improve student achievement in class IX SMP Negeri 10 Malang. As proof that, from 34 students who carried out learning activities, it was found that the scores of 80, 90 and 100 had increased. Those who scored 80/good enough, in the first cycle: 8 (23.53%) students in the second cycle: 9 (26.47%) students in the third cycle: 13 (38.24%) students. Those who scored 90/good in the first cycle: 1 (2.94%) students in the second cycle: 5 (14.71%) students in the third cycle: 10 (29.41%) students. Those who scored 100/excellent in the first cycle: 0 (0%) students in the second cycle: 0 (0%) students in the third cycle: 1 (2,94%) students. Thus, the jigsaw method of learning can improve the learning outcomes of class IX students in the even semester of 2016/2017 academic year. ABSTRAKTujuan penelitian ini adalah untuk mengetahui dampak dan implementasi metode jigsaw dalam belajar mata pelajaran IPA ( Fisika ) dapat meningkatkan prestasi belajar siswa kelas IX SMP Negeri 10 Malang Kota Malang . Metode yang digunakan dalam penelitian ini adalah metode penelitian tindakan kelas (PTK). Sedangkan teknik pengumpulan data yang digunakan adalah observasi, wawancara, dokumentasi dan analisis data secara deskriptif. Penelitian ini dilakukan dalam 3 siklus yakni siklus I siklus II dan siklus III. Subjek penelitian adalah 34 orang siswa kelas IX SMP Negeri 10 Malang Tahun Pelajaran 2016/2017. Setelah dilakukan penelitian di kelas IX SMP Negeri 10 Malang, hasil belajar siswa dengan menggunakan metode pembelajaran Model jigsaw, dapat meningkatkan prestasi belajar Siswa Kelas IX SMP Negeri 10 Malang. Sebagai buktinya bahwa, dari 34 siswa yang melakukan kegiatan belajar didapatkan pada perolehan nilai 80 , 90 dan 100 mengalami peningkatan. Yang memperoleh nilai 80/cukup baik, pada siklus I : 8 (23,53%) siswa pada siklus II : 9 (26,47%) siswa pada siklus III : 13 (38,24%) siswa. Yang memperoleh nilai 90/baik pada siklus I : 1 (2,94%) siswa pada siklus II : 5 (14,71%) siswa pada siklus III : 10 (29,41%) siswa. Yang memperoleh nilai 100/sangat baik pada siklus I : 0 (0%) siswa pada siklus II : 0 (0%) siswa pada siklus III : 1 (2,94%) siswa. Dengan demikian, metode pembelajaran dengan metode jigsaw dapat meningkatkan hasil belajar siswa kelas IX semester genap tahun pelajaran 2016/2017.

COVID-19: Exercise Behavior of College Students Communicating at Home

Background: During the outbreak and spread of COVID-19, the extension of college students' time spent studying at home changed their physical exercise behavior and affected the physical activity behavior of the whole family.Methods: A questionnaire survey was conducted among 1,582 college students using a specific measurement scale. A total of 305 urban college students were selected as research subjects. SPSS24.0 and AMOS24.0 were used for statistical analysis.Results: During the COVID-19 transmission period, the pair correlation coefficients of exercise behavior, exercise attitude, and family exercise conditions were 0.63, 0.36, and 0.25, respectively. The influence on family exercise behavior is as follows: college students' exercise behavior (0.403), family exercise support (0.329), and college students' exercise attitude (0.257). The most significant influence on family exercise support is college students' exercise attitude (0.509). The regression model of family exercise behavior standardization had 0.74 and 0.44 explanatory power to family exercise behavior and family exercise support, respectively.Conclusions: The individual-level interventions were assessed by considering the interaction between individual exercise behavior and individual factors. In addition, the exercise environment exhibited a regulatory role and should be controlled. At the interpersonal level, the communication of the college students regarding exercise behavior was bidirectional. Exercise support for family members is an important factor affecting two-way communication and has a significant effect. With the development of the exercise behavior theory, the interaction between individuals is the origin of the spread of group behavior. The data suggest that instead of one-way influence two-way influence mechanisms should be proposed to assess the transformation from the individual to group exercise behavior.