scholarly journals ANALYSIS OF TRAINING METHOD OF TAEKWONDO ATHLETES WITH REACTION BALL

2022 ◽  
Vol 28 (1) ◽  
pp. 14-16
Author(s):  
Wei Zong
Keyword(s):  
Standard Deviation ◽  
Reaction Time ◽  
Standard Error ◽  
Average Score ◽  
Training Methods ◽  
Research Subjects ◽  
Level Of Evidence ◽  
Camera System ◽  
The Moment ◽  
Reaction Speed

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.

scholarly journals Website Rankings for Digital Health Centers in the USA: Applying Usability Testing for Public Engagement. (Preprint)

2020 ◽  
Author(s):  
Joshua David Calvano ◽  
Edwin Lauritz Fundingsland Jr ◽  
Deborah Lai ◽  
Sara Silacci ◽  
Ali S Raja ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Health Center ◽  
Standard Error ◽  
Computer Literacy ◽  
Digital Health ◽  
Usability Testing ◽  
Health Centers ◽  
Average Score ◽  
Content Quality ◽  
Web Presence

BACKGROUND As the public increasingly looks to the internet for resources and information regarding health and medicine, it is important that healthcare organizations provide adequate web resources. Usability refers to the ease of user experience on a website. In this study, we focus on usability analyses for digital health center websites. Our objectives were to develop adapt pre-existing usability scoring systems for United States digital health center websites, then apply this system to a sample for the purposes of testing this system and deriving insights from the results on potential areas of improvement for this sample. OBJECTIVE The primary aims of the study were to: 1) Adapt a pre-existing usability scoring methodology to digital health centers; 2) apply and test this adapted usability scoring methodology on a sample set of digital health center website and; 3) derive recommendations from these results on potential areas of improvements for our sample of digital health center websites. METHODS All website usability testing took place from 1 March 2020 to 15 March 2020. We adapted a methodology and scoring system developed from previous literature and applied it to digital health center websites. Our sample included 67 digital health centers affiliated with U.S. universities or hospitals systems. Usability was split into four broad categories: Accessibility (ability of those with low levels of computer literacy to access and navigate hospital’s Web presence), Marketing (ability to be found through search engines, examining the relevance of descriptions to the links provided), Content Quality (grammar, frequency of info updates, material relevancy, and readability), and Technology (download speed, quality of the programming code, and website infrastructure). Using these usability tools, we scored each website in each of the four categories. The composite of key factors in each of the four categories contributed to an overall “General Usability” score for each website. An overall score was then calculated by applying a weighted percentage across all factors and used for the final ranking system. RESULTS The category with the overall highest average score was Content Quality, with a 6.3. Content Quality also had the highest standard deviation at +/- 2.18, with a standard error of 0.27. The lowest performing category was Technology, with an average of 0.9. Technology also had the smallest standard deviation at +/- 0.07, with a standard error of 0.01. CONCLUSIONS Data suggests that Content Quality on average was the highest scored variable amongst digital health center websites. Because content is crucial to the knowledge of digital health it is justified that digital health centers invest more in creating quality content. The overall lowest scored variable was Technology. Potential reasons for this finding are related to designated funding for servers, a lack of regulatory framework around social media presence and liability, or infrequent website audits. An easy way to improve this variable is by increasing speed. Accessibility is another area in which these organizations have potential for improvement. In the effort to improve the dissemination of reliable information, this is arguably the most important variable for digital health centers to address. Our recommendation is that these organizations perform periodic audits of their web presence utilizing these tools.

scholarly journals UPAYA MENINGKATAN HASIL BELAJAR FISIKA MELALUI PEMBERIAN UMPAN BALIK DALAM DISKUSI KELOMPOK

Vidya Karya ◽  
2019 ◽  
Vol 33 (2) ◽  
pp. 95
Author(s):  
Irmasuriani Irmasuriani
Keyword(s):  
Standard Deviation ◽  
Learning Outcomes ◽  
Action Observation ◽  
Average Score ◽  
Research Subjects ◽  
Group Discussions ◽  
Physics Learning ◽  
Reflection Data ◽  
Group Members ◽  
Giving Feedback

Abstract. The research aims to improve physics learning outcomes through providing feedback in group discussions. The study involved class XII MIA 2 students of SMA Negeri 4 Takalar as many as 35 students consisting of 22 female and 13 male as research subjects and 2 teachers as observers. This study uses classroom action research methods carried out in two cycles with the stages of planning, action, observation, and reflection. Data were collected with physics learning achievement test instruments and student activity observation sheets. The data collected was then analyzed using qualitative and quantitative analysis techniques. The results showed that giving feedback in group discussions resulted in an increase in the average score of physics learning outcomes of students in the first cycle was 12.84 with a standard deviation of 1.675 to 17.28 with a standard deviation of 0.843 for cycle II. From the results obtained it can be concluded that there is an increase in physics learning outcomes in class XII MIA 2 at SMA Negeri 4 Takalar by conducting a guidance process to discussion group members in the learning process and giving feedback and correcting students' mistakes at each meeting. Keywords: physics learning outcomes, group discussions, feedback Abstrak. Penelitian ini bertujuan untuk meningkatkan hasil belajar fisika melalui pemberian umpan balik dalam  diskusi kelompok. Penelitian melibatkan siswa kelas XII MIA 2 SMA Negeri 4 Takalar sebanyak 35 siswa yang              terdiri dari 22 perempuan dan 13 laki-laki sebagai subjek penelitian dan 2 orang guru sebagai observer. Penelitian ini menggunakan metode penelitian tindakan kelas yang dilaksanakan dalam dua siklus dengan tahapan perencanaan, tindakan, observasi, dan refleksi. Data dikumpulkan dengan intrumen tes hasil belajar fisika dan lembar observasi aktivitas siswa. Data yang terkumpul, kemudian dianalisis dengan menggunakan teknik analisis kualitatif dan kuantitatif. Hasil penelitian menunjukkan bahwa dengan pemberian umpan balik dalam diskusi kelompok mengabkibatkan peningkatan skor rata-rata hasil belajar fisika siswa pada  pada siklus I adalah 12,84 dengan standar deviasi 1,675 menjadi 17,28 dengan standar deviasi 0,843 untuk siklus II. Dari hasil yang diperoleh disimpulkan bahwa terdapat peningkatan hasil belajar fisika di kelas XII MIA 2 di SMA Negeri 4 Takalar dengan melakukan proses bimbingan pada anggota kelompok diskusi pada proses pembelajaran berlangsung dan memberikan umpan balik serta mengoreksi kesalahan siswa pada setiap pertemuan. Kata Kunci: hasil belajar fisika, diskusi kelompok, umpan balik

PENINGKATAN HASIL BELAJAR SISWA KELAS X MIPA SMAN 1 LUBUKLINGGAU MELALUI PENGGUNAAN MEDIA POWERPOINT

2020 ◽  
Vol 2 (2) ◽  
pp. 64-72
Author(s):  
Yetri Ningsih
Keyword(s):  
Student Learning ◽  
Learning Outcomes ◽  
Mathematics Learning ◽  
Student Learning Outcomes ◽  
Average Score ◽  
Research Subjects ◽  
Learning Mathematics ◽  
And Mathematics ◽  
Academic Year ◽  
Improve Student Learning

This research conducted caused by students' score at class X MIPA 4 very low in the vector material. The avarage of score of the daily test obtained by students was 60,5 and it had not yet reached mastery learning. One of the efforts to improve learning outcomes was to use powerpoint as a learning media. The purpose of this study was to determine the increase in activity and mathematics learning outcomes on vector material in learning using PowerPoint.This research design used the classroom action research. The research subjects were 36 students of class X MIPA 4 SMA Negeri 1 Lubuklinggau in the 2019/2020 academic year. Data collected by using tests and observations.The test used to obtain student learning outcomes in each cycle, while observation used to determine the learning process in each cycle. Data were analyzed using descriptive statistics. The results showed that the average score of student learning outcomes in the first cycle was 62.2 and 77.3 in the second cycle. The percentage of student learning completeness in the first cycle was 52.8%, in the second cycle it was 80.6%. The percentage of improvement in student learning outcomes after being given action was 15.29%. So it can be concluded that learning mathematics by using powerpoint media can improve student learning outcomes in class X MIPA 4 SMA Negeri 1 Lubuklinggau in the 2019/2020 academic year.

A volar approach to on-top plasty for correction of radial polydactyly: a case series of 21 patients

2021 ◽  
pp. 175319342098185
Author(s):  
Xia Fang ◽  
Ping-tak Chan ◽  
Shengbo Zhou ◽  
Xinyi Dai ◽  
Ruiji Guo ◽  
...  
Keyword(s):  
Case Series ◽  
Functional Results ◽  
Metacarpophalangeal Joint ◽  
Contralateral Side ◽  
Average Score ◽  
Pinch Strength ◽  
Level Of Evidence ◽  
Volar Approach ◽  
Flexion Extension ◽  
Aesthetic Results

Correction of unequal radial polydactyly in which neither thumb duplicates possess both well-developed proximal and distal components, remains challenging. Current techniques using on-top plasty techniques require circumferential incisions, often resulting in postoperative swelling and dorsal scars. We described our experience using a volar approach to achieve better aesthetic and functional results. Twenty-one patients underwent this surgery between 2008 and 2018, with a mean follow-up of 5.1 years. The mean flexion–extension arc for the metacarpophalangeal joint was 75° and that of the interphalangeal joint was 43°. Mean percentage of key, tripod and tip pinch strength were 77%, 79% and 77%, respectively, when compared with the contralateral side. The Vancouver Scar Scale showed an average score of 1.2. We conclude from our study that the volar approach to on-top plasty is a good technique for the correction of unequal radial polydactyly, with good functional and aesthetic results. Level of evidence: IV

scholarly journals An alternative to the rejection of observations

1932 ◽  
Vol 137 (831) ◽  
pp. 78-87 ◽  
Keyword(s):  
Standard Deviation ◽  
Continuous Function ◽  
Large Deviations ◽  
Opposite Direction ◽  
Standard Error ◽  
The Other ◽  
Cause Of Error ◽  
The Mean ◽  
Normal Law ◽  
Usual Rule

1. It is widely felt that any method of rejecting observations with large deviations from the mean is open to some suspicion. Suppose that by some criterion, such as Peirce’s and Chauvenet’s, we decide to reject observations with deviations greater than 4 σ, where σ is the standard error, computed from the standard deviation by the usual rule; then we reject an observation deviating by 4·5 σ, and thereby alter the mean by about 4·5 σ/ n , where n is the number of observations, and at the same time we reduce the computed standard error. This may lead to the rejection of another observation deviating from the original mean by less than 4 σ, and if the process is repeated the mean may be shifted so much as to lead to doubt as to whether it is really sufficiently representative of the observations. In many cases, where we suspect that some abnormal cause has affected a fraction of the observations, there is a legitimate doubt as to whether it has affected a particular observation. Suppose that we have 50 observations. Then there is an even chance, according to the normal law, of a deviation exceeding 2·33 σ. But a deviation of 3 σ or more is not impossible, and if we make a mistake in rejecting it the mean of the remainder is not the most probable value. On the other hand, an observation deviating by only 2 σ may be affected by an abnormal cause of error, and then we should err in retaining it, even though no existing rule will instruct us to reject such an observation. It seems clear that the probability that a given observation has been affected by an abnormal cause of error is a continuous function of the deviation; it is never certain or impossible that it has been so affected, and a process that completely rejects certain observations, while retaining with full weight others with comparable deviations, possibly in the opposite direction, is unsatisfactory in principle.

scholarly journals Effect of Head Impact Exposures on Changes in Cognitive Testing

2018 ◽  
Vol 6 (3) ◽  
pp. 232596711876103 ◽  
Author(s):  
Eleni Diakogeorgiou ◽  
Theresa L. Miyashita
Keyword(s):  
Reaction Time ◽  
National Collegiate Athletic Association ◽  
Assessment Tool ◽  
Vital Signs ◽  
Head Impact ◽  
Cognitive Testing ◽  
Repeated Impact ◽  
Level Of Evidence ◽  
Head Impacts ◽  
Significant Difference

Background: Gaining a better understanding of head impact exposures may lead to better comprehension of the possible effects of repeated impact exposures not associated with clinical concussion. Purpose: To assess the correlation between head impacts and any differences associated with cognitive testing measurements pre- and postseason. Study Design: Case-control study; Level of evidence, 3. Methods: A total of 34 National Collegiate Athletic Association Division I men’s lacrosse players wore lacrosse helmets instrumented with an accelerometer during the 2014 competitive season and were tested pre- and postseason with the Sport Concussion Assessment Tool (SCAT 3) and Concussion Vital Signs (CVS) computer-based neurocognitive tests. The number of head impacts >20 g and results from the 2 cognitive tests were analyzed for differences and correlation. Results: There was no significant difference between pre- and postseason SCAT 3 scores, although a significant correlation between pre- and postseason cognitive scores on the SCAT 3 and total number of impacts sustained was noted ( r = –0.362, P = .035). Statistically significant improvements on half of the CVS testing components included visual reaction time ( P = .037, d = 0.37), reaction time ( P = .001, d = 0.65), and simple reaction time ( P = .043, d = 0.37), but no correlation with head impacts was noted. Conclusion: This study did not find declines in SCAT 3 or CVS scores over the course of a season among athletes who sustained multiple head impacts but no clinical concussion. Thus, it could not be determined whether there was no cognitive decline among these athletes or whether there may have been subtle declines that could not be measured by the SCAT 3 or CVS.

scholarly journals Intra-operative assessment of the vascularisation of a cross section of the meniscus using near-infrared fluorescence imaging

2021 ◽  
Author(s):  
Peter van Schie ◽  
Thies J. N. van der Lelij ◽  
Maxime Gerritsen ◽  
Ruben P. J. Meijer ◽  
Ewoud R. A. van Arkel ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Cross Section ◽  
Near Infrared ◽  
Level Of Evidence ◽  
Camera System ◽  
Near Infrared Fluorescence ◽  
Nirf Imaging ◽  
Total Knee ◽  
Operative Assessment ◽  
Near Infrared Fluorescence Imaging

Abstract Purpose The purpose of this study was to assess whether the vascularisation of the meniscus could be visualised intra-operatively using near-infrared fluorescence (NIRF) imaging with indocyanine green (ICG) in patients undergoing total knee arthroplasty (TKA). Methods The anterior horn (i.e., Cooper classification: zones C and D) of the meniscus that was least affected (i.e., least degenerative) was removed during TKA surgery in ten patients to obtain a cross section of the inside of the meniscus. Thereafter, 10 mg of ICG was injected intravenously, and vascularisation of the cross section of the meniscus was assessed using the Quest spectrum NIRF camera system. We calculated the percentage of patients in whom vascularisation was observed intra-operatively using NIRF imaging compared to immunohistochemistry. Results Meniscal vascularisation using NIRF imaging was observed in six out of eight (75%) patients in whom vascularisation was demonstrated with immunohistochemistry. The median extent of vascularisation was 13% (interquartile range (IQR) 3–28%) using NIRF imaging and 15% (IQR 11–23%) using immunohistochemistry. Conclusion This study shows the potential of NIRF imaging to visualise vascularisation of the meniscus, as vascularisation was observed in six out of eight patients with histologically proven meniscal vascularisation. Level of evidence IV.

scholarly journals Traumatic Brain Injury, Aging and Reaction Time

1989 ◽  
Vol 16 (2) ◽  
pp. 161-167 ◽  
Author(s):  
D.T. Stuss ◽  
L.L. Stethem ◽  
T.W. Picton ◽  
E.E. Leech ◽  
G. Pelchat
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Standard Deviation ◽  
Reaction Time ◽  
Attentional Control ◽  
Focused Attention ◽  
Redundant Information ◽  
Complex Reaction ◽  
Control Processes ◽  
Simple Rt

ABSTRACT:The effects of traumatic brain injury (TBI) and aging were compared on tests of simple and complex reaction time (RT). Simple RT was not significantly affected by aging or TBI. TBI patients, however, tended to be slower on Simple RT tasks, and had a larger standard deviation. Individuals over age 60 and patients of any age with TBI demonstrated slower RT with choice RT tests. In addition, both groups (those over 60 and TBI patients) were less able than other groups to inhibit the processing of redundant information. For the TBI patients, this occurred primarily on reassessment. These results suggest that the deficit in both aging and TBI is not only a generalized neuronal slowing but a more specific impairment in attentional control processes, exhibited as a deficit in focused attention.

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