scholarly journals Analysis of the delivery plane in the golf swing using principal components

Author(s):  
Andrew Morrison ◽  
Denise McGrath ◽  
Eric S Wallace

Although the swing plane has been a popular area of golf biomechanics research, the movement of the club relative to the swing plane has yet to be shown experimentally to have a relationship with performance. This study used principal component and subsequent multiple regression analysis to investigate the relationship between the movement of the club relative to the delivery plane and clubhead characteristics at ball impact. The principal components reflected deviations from an individual swing plane, and lower values of these components were associated with less variability in the clubface impact location. In the event that a golf coach wants to improve the precision of ball striking, the results from this study suggest that both simplicity of the route and alignment of the club to the final trajectory before impact could be advantageous. However, this does not suggest that the technique should be based on a ‘model’ swing plane.

2019 ◽  
Vol 12 (1) ◽  
pp. 420-423
Author(s):  
Prapada Watcharanat ◽  
Prasong Tanpichai ◽  
Ravee Sajjasophon

Purpose: This research aims to study the relationship between perception of elderly’s health and health behaviors in Nakhon Nayok province, Thailand Methods: This research was a cross-sectional study. The questionnaire was used to collect the data. This research was conducted in Nakhon Nayok province. The sample size was 270 which applied Taro Yamane's formula at a significant level 0.05. The descriptive statistics was implemented to describe the variables by presenting the frequency, percentage, mean and standard deviation. Furthermore, multiple regression analysis was applied to analyze the relationship between perception of elderly’s health and health behaviors. The statistical significance was considered to reject Hypothesis-null at < 0.05. Results: From a total of 270 people, more than 58.22% of the elderly perceived that they had moderate health conditions. Most elderly had congenital diseases (62.2%). The multiple regression analysis results showed that health status perception and health status perception when compared to their cohort related significantly to health behavior. Conclusion: The government should support the elderly on participation, trust, engagement, and cultural concern of the people in the community, which can contribute to promoting the physical, mental and social condition of the elderly.


Author(s):  
Sulistyo Ariebowo Djajusman ◽  
Hadi Susilo Arifin ◽  
Etty Riani

Total suspended solid (TSS) is one of the parameters that determines whether or not a body of water is polluted. One factor that influences the amount of TSS content is the characteristic of rainfall in an area. Purpose of this study was to determine the relationship between the effect of rainfall characteristics and TSS content in Ciliwung River. Multiple regression analysis was used for analytical method.  Results of multiple regression analysis showed that the correlation coefficient (adjusted R2) for the factors of rainfall, discharge and sediment show a low correlation to changes the content of TSS in Ciliwung River. The value of each correlation coefficient in the upstream, middle, and downstream of Ciliwung River are 0.21, 0.31, and 0.09 respectively. According to the F test, rainfall, discharge and sediment  were significantly affect TSS content in the upstream and middle stream.  Based on t test, it is known that only rainfall affect TSS content in the upstream and midlle stream.


2004 ◽  
Vol 51 (2) ◽  
pp. 83-88 ◽  
Author(s):  
Slobodan Dodic ◽  
Vladimir Sinobad ◽  
Igor Djordjevic

Using a special questionnaire adapted for computer evaluation, the prevalence of signs and symptoms of craniomandibular disorders (CMD) and occlusal disharmonies was investigated in a group of 500 adolescents of the Republic of Serbia ranging between 18 and 25 years of age. The presence of signs (symptoms) of CMD and occlusal discrepancies was established using clinical exsamination and evaluated according to the clinical disfunction index (D i) and index of the occlusal state (Oi) proposed by Helkimo et al. 1974. The results of this study revealed that 327 (65.4%) adolescents in the examined group had at least one sign (symptom) of CMD, (Di > 1), and that 271 (54.2%) adolescent had also mild, or severe occlusal discrepancies (Oi > 1). The percentage of persons with signs(symptoms) of CMD was significantly greater in the group having occlusal discrepancies (X = 7.76, P<0.01). The multiple regression analysis of the obtained data and the ODDS ratio confirmed the risk of CMD in the group with occlusal discrepancies to be 2.5 times greater than in the group of adolescents without occlusal discrepancies.


2022 ◽  
pp. 130-149
Author(s):  
Bikash Basnet ◽  
Sarah Eyaa ◽  
Nekpen Euodia Okhawere

This chapter integrates collectivism with the dimensions of the Expectancy Theory to investigate the direct and indirect impact of horizontal and vertical collectivism on employee motivation of operational and non-operational staff. Data were collected from 205 employees using a cross-sectional survey. Hypotheses were tested with multiple regression analysis. Across both employee categories, horizontal collectivism improves motivation while vertical collectivism does not have a significant impact on motivation. Mediation effects were significant in the relationship between horizontal collectivism across both employee categories. However, there were some variations in the mediation effects on the relationship between vertical collaboration and motivation across the two categories. This chapter contributes to motivation literature by integrating the Expectancy Theory with two under-investigated dimensions of collectivism to compare motivation determinants among operational and non-operational staff. This chapter presents implications for managers and policy for improving employee motivation.


2015 ◽  
Vol 70 (3) ◽  
pp. 232-242 ◽  
Author(s):  
Ahmet Bulent Ozturk ◽  
Ozgur Ozer ◽  
Uğur Çaliskan

Purpose – The purpose of this study was to determine the local residents’ attitudes of tourism in Kusadasi, Turkey. In addition, the relationship between residents’ attitudes toward tourism and their overall perceived happiness was analyzed. Design/methodology/approach – A correlational, quantitative research technique was used in this study. The data of this study were collected from 383 local residents in Kusadasi, Turkey. Exploratory factor analysis and multiple regression analysis were conducted to analyze the data. Findings – The results of the study indicated that local residents had favorable attitudes toward tourism in terms of its positive economic, cultural and environmental impact. Study results also indicated that negative economic impact of tourism was found to be the least favorable construct associated with residents’ attitudes toward tourism in Kusadasi. In addition, multiple regression analysis indicated that local residents’ perceived overall happiness was significantly influenced by positive and negative cultural and environmental impact and positive economic impact factors. Originality/value – The findings of the study provide valuable information to tourism planners and decision makers seeking to build a resident friendly tourism destination in Kusadasi, Turkey.


1994 ◽  
Vol 11 (3) ◽  
pp. 275-283 ◽  
Author(s):  
Janice L. Causgrove Dunn ◽  
E Jane. Watkinson

This study explored the relationship between perceived physical competence and physical awkwardness in an effort to gain further understanding of the effects of motor incompetence on behavior. Subjects included 195 children in Grades 3 through 6. Multiple regression analysis found that gender, the importance attached to physical competence, and the interaction between severity of awkwardness and grade were significant predictors of perceptions of physical competence. As expected, males reported higher perceptions of physical competence than females. In addition, the higher the rating that subjects attached to the importance of physical competence, the higher their perceptions of physical competence. Investigation of the interaction between severity of awkwardness and grade revealed that the expected decrease in perceptions of competence associated with increasing severity of awkwardness was present only in third-grade children. It is suggested that older awkward children may utilize strategies to maintain positive perceptions of competence and motivation.


2003 ◽  
Vol 96 (3_suppl) ◽  
pp. 1194-1196 ◽  
Author(s):  
E. Michael Loovis ◽  
Stephen A. Butterfield

This study examined the relationship between hand length and catching performance by 257 children (142 boys, 115 girls) in Grades K–2. Children's catching performance was determined by the number of successful catches (0–5) when a small ball was tossed underhand from 10 ft. Specifically, the children were tested on the qualitative aspects of catching, i.e., form, and catching accuracy, i.e., successful catching. Hand length was measured by standard anthropometric technique. A multiple regression analysis showed age, sex, and hand length contributed significantly ( p = .001) to catching accuracy and catching form. Implications for instruction and further research are offered.


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