• Korean Journal of Applied Biomechanics
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• v.19 no.1
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• pp.167-177
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• 2009

The purpose of this study was to investigate effect of golf shoe design on kinematic variables during golf swing. Five professional male golfers with shoe size 270mm were recruited for the study. Swing motion was collected using 8 high speed camera motion analysis at a sampling of 180Hz. Kinematic variables were calculated by EVaRT 4.2 software. Driver swing was divided into four events; El(adress), E2(top), E3(impact) and E4(finish). Time, peak velocity, velocity of center of mass, velocity of the foot and ankle angle during Phase 1(El-E2), Phase 2(E2-E3), and Phase 3(E3-E4) were analyzed in order to investigate the relationship between golf shoe design and swing performance. The findings indicated that type C golf shoes would be beneficial for stability and control of movement during address and swing performance. Furthermore, faster speed of golf shoes, center of mass, and both feet were observed with Type C golf shoes. It is expected that golfers with Type C golf Shoes provide greater force as they control the center of mass faster and increase rotational force during impact compared to other golf shoes.

• Weed & Turfgrass Science
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• v.4 no.4
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• pp.368-375
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• 2015

Earthworm cast occurred in surface of turfgrass in golf courses which affect turfgrass maintenance and golf play. In this study several survey of seasonal fluctuation of earthworm cast in different golf courses (Anseong, Gapyeong, Gunpo and Yongin in Gyeonggi province, and Geumjeong in Busan) was done. A number of earthworm, soil temperature and moisture of detection site of earthworm cast in each golf course were also done. Cast occurred in different golf courses are found mostly from April to November on turf surface and the cast number varied in different month as well as in golf courses. In the same golf courses, a number of detected cast was difference from individual sites. A number of cast and earthworm was correlated. Also, in higher soil moisture showed the higher cast density in different golf courses. Soil temperature and moisture of detecting cast ranging from $2.1^{\circ}C$ to $33.1^{\circ}C$ and 4.9 to 44.1%, respectively. In case of cast, soil temperature level lies in between $10-15^{\circ}C$ where the highest soil moisture was 25%.

• Journal of Korean Society on Water Environment
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• v.27 no.6
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• pp.784-793
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• 2011

Activities on golf courses are believed to contribute to the degradation of water quality in receiving waters due to the excessive use of farm chemicals including fertilizers and pesticides. The objective of this study was to collect basic data that could explain the characteristics of non-point source (NPS) pollution discharged from a golf course. Twenty seven water quality monitoring was conducted at a golf course during the rainy season of 2008 and 2009. The results indicated that the ranges of the Event Mean Concentration (EMC) at the golf course were $BOD_5$ 1.8~11.3 (ave. 5.6) mg/L, $COD_{Mn}$ 19.2~51.4 (ave. 39.6) mg/L, TOC 11.0~31.0 (ave. 16.8) mg/L, TN 1.545~16.098 (ave. 5.623) mg/L, TP 0.230~4.528 (ave. 1.525) mg/L, and SS 2.2~57.3 (ave. 10.1) mg/L. The unit loads of the golf course estimated were $BOD_5$ $3.35kg/km^2/day$, SS $6.43kg/km^2/day$, $COD_{Mn}$ $30.00kg/km^2/day$, TN $4.04kg/km^2/day$, TP $1.14kg/km^2/day$, and TOC $12.16kg/km^2/day$. Golf courses are currently classified as a grass field in which the unit loads are different from golf courses. Therefore, it was recommended that golf courses need to be separated from the grass field when the surveys and modelings for Total Maximum Daily Load (TMDL) development and the evaluation of TMDL implementation were performed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.2
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• pp.620-627
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• 2010

This study for construction of golf courses is to present basic information and pattern of change of construction cost by looking at the capacity of construction, requiring time and other aspects. The propose of this study is to develop the model of brief cost expected by using cost index and analyzing the actual work cost data gathered in golf course construction industry in Korea. The equation used for the cost-capacity index in other to deliver the expected construction cost is followed next. The results of this study, by regression analysis for the information of 7 golf courses, it could be found the cost-capacity index n, such as 0.72 for whole construction, 0.67 for net construction.

• Journal of Environmental Science International
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• v.20 no.10
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• pp.1297-1308
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• 2011

This study is to analyze the characteristics of golf course water usage using groundwater and rainwater data obtained from 17 golf courses in Jeju Island during 2007~2009. The groundwater usages were 246,275 $m^3/year$, 213,062 $m^3/year$, 155,235 $m^3/year$, and 126,666 $m^3/year$ in the west, south, east, and north regions, respectively. Monthly rate of the amount of groundwater usage to the amount of permission was 29.5%. The rainfall usages were 386,591 $m^3/year$, 326,464 $m^3/year$, 251,248 $m^3/year$, and 232,061 $m^3/year$ in the south, west, east, and north regions, respectively. Monthly rate of rainwater usage to the amount of water retention of golf courses was 19.6%. The average annual water usage in the 17 golf courses was 499,377 $m^3/year$. From the average usage, it was found that the rainwater usage (305,126 $m^3/year$ ) was 1.6 times higher than that of groundwater (194,251 $m^3/year$ ). That means the annual average rainwater usage to the entire water usage was 61.1%, which was above the criteria of 40%.

• Journal of Korea Multimedia Society
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• v.12 no.5
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• pp.699-707
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• 2009

Recently, while 3D sports game increases, the research that it recognizes the operation of the real user actively progresses. Most of all, the research about the golf is active. In this paper, the camera acquiring in a high-speed multi-exposure image measures the flight data of the golf ball through the image processing. While photographing, the high-speed camera, using this system, exposes an image at regular intervals. And line scan camera checks whether the golf ball passed or not. After the location information of the calculated golf ball calculates a speed and a direction by using the physical formula, it applies the golf simulation. After, this system is possible the measurement of the physical element of the spherical object.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.875-879
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• 2009

In this paper, we propose the measurement camera system of flight data of golfball for the application of screen golf contents. The existing flight data extraction system that applied on the screen golf content divided plate is dependent on it. in this paper, the camera system install in the ceiling that is able to look at passing golf ball. And left-handed and left-handed bats in the clear of the restrictions. Using high-speed CCD camera is shooting the ball flying. Acquired image is calculated from the coordinates. The location information of the calculated golf ball calculates a speed and a direction by using the physical formula, it applies the golf contents. After this system is useful sports type contents baseball, soccer, tennis.

• Journal of the Korea Society of Computer and Information
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• v.28 no.1
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• pp.39-47
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• 2023

In this paper, we propose a method to measure the similarity between golf swings in videos. As it is known that deep learning-based artificial intelligence technology is effective in the field of computer vision, attempts to utilize artificial intelligence in video-based sports data analysis are increasing. In this study, the joint coordinates of a person in a golf swing video were obtained using a deep learning-based pose estimation model, and based on this, the similarity of each swing segment was measured. For the evaluation of the proposed method, driver swing videos from the GolfDB dataset were used. As a result of measuring swing similarity by pairing swing videos of a total of 36 players, 26 players evaluated that their other swing sequence was the most similar, and the average ranking of similarity was confirmed to be about 5th. This ensured that the similarity could be measured in detail even when the motion was performed similarly.

• Asian Journal of Turfgrass Science
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• v.24 no.2
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• pp.218-224
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• 2010

The purpose of this case study is to analyze the environmental and sociological impacts on a golf course construction at the damaged area of a previous limestone mine. Due to a long term of the open-pit mining, that site had been abandoned with geographical and ecological destruction before it was renovated to Ostar Danyang public golf course. This study is focused on the review of restoring the ecosystem through golf course construction procedures. Literature surveys of restoration through golf course construction in Japan and Canada were analyzed the procedure of utilization of previously existed lime mine. The sociological and environmental changes before and after construction were compared and analyzed. Environmental impacts on geographical, animal and plant ecology, and water quality were not affected or significantly improved after golf course construction from the mining site existed before. The local economy was also improved by increasing employment of resident and tax payment to local government. The construction of golf course could be one of the typical alternatives of ecological restoration of abandoned lime mine. Moreover in this project, minimizing the environmental impacts on surrounding ecosystem was emphasized by a larger size of developing construction. The harmonious lay-out on nature and artificial landscape were also considered a very first stage of construction procedure.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.10
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• pp.4337-4347
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• 2011

The purpose of this study is to analyze a research on the influence of consumers' purchasing selection criteria for golf-wear upon clothing pursuit benefit and purchase satisfaction. It selected people who are using golf games and golf courses in each city and county where are located in Gangwon-do Province, and surveyed targeting totally 206 people by using convenience sampling. As for data processing, the collected materials in this study were carried out frequency & percentage, reliability analysis, correlation & multiple regression analysis by using SPSS 13.0 program. The results are as follows. First, as a result of analyzing socio-demographic characteristics, the similar distribution was shown by gender with 51.0% in men and 49.0% in women. By age, the age group from their 40s to 50s was indicated to be the largest. The martial status was indicated to be a litter higher in the married with 57.3% compared to the unmarried with 42.7%. By healthy condition, what tends to be healthy can be known to be the largest with 79.4%. Second, positive correlation was indicated all in correlation of consumers' purchasing selection criteria for golf-wear with the clothing pursuit benefit and satisfaction. Third, as a result of analyzing on relationship of the golf-wear purchasing selection criteria with the clothing pursuit benefit, the purchasing selection criteria were indicated to have influence upon the ideal pursuit, the fashion & brand, comfort pursuit, and youthand-individuality pursuit, which are the clothing pursuit benefits. Fourth, the analytical result on the purchasing selection criteria for golf-wear with purchase satisfaction was indicated to have significant influence upon consumers' golf-wear purchase satisfaction.