• Korean Journal of Applied Biomechanics
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• v.34 no.1
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• pp.34-44
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• 2024

Objective: This study aimed to investigate how the movements occurring during the follow-through phase after releasing an arrow among elite compound archers, are associated with the arrow impact points on the target. Method: Nine elite archers performed consecutive compound archery shooting under conditions identical to actual competitions using their own bows and equipment. Motion capture system and force platform were utilized to record the changes in joint positions and center of pressure, respectively. Principal component analysis was employed to identify the patterns in which multidimensional joint positions and COP changes were organized with horizontal and vertical coordinates of arrow impact points. Subsequently, correlation analysis quantified the relationship between individual variables and the coordinates of arrow impacts on the target. Results: We found a common organizational pattern in which the two axes of the impact point coordinates were grouped into the first two principal components. The movements of the upper and lower limbs following release exhibited opposite patterns in the anterior-posterior axis, with significant correlations observed between the arrow impact points of the horizontal axis and the left shoulder, right elbow, left hip, and both knees. Additionally, the lateral movements induced by the reaction force upon arrow release showed significant associations with the vertical coordinates of the impact points. Particularly, the correlations between the movements of the left shoulder and elbow, as well as the bilateral hip and right knee, were consistently observed among all participants. Conclusion: These findings implied that the post-release movements could significantly influence the trajectory and impact points of the arrows in compound archery. We suggest that a consistent and controlled movement during the follow-through phase may be more beneficial for optimizing shooting accuracy and precision rather than minimizing movements.

• Journal of the Korea Fashion and Costume Design Association
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• v.12 no.1
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• pp.35-49
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• 2010

The Imwon Sipyukji of this study was compiled by Seo Yugu (1764~1845), a famous agronomical scholar of the late eighteenth century. The contents of this book are divided into sixteen chapters related to all the important parts of rural home life ranging from daily routines to social life covering the agro-industry and the six skills of manners, music, archery, calligraphy, mathematics and horseback riding. Seomyongji, one of the sixteen chapters, covers all that is necessary for living a rural existence such as house-building, clothing adornments and transportation as well as how to make and use daily household items. The contents of the Boksik Jigu sub-section in the Sumyongji chapter consist of eight large units covering men's and women's clothing, bedding and pillows, sewing tools, belt and shoes accompanying the attire and storage for clothes. These eight are further subdivided into 65 items, each warranting a detailed explanation. My study will translate the original Chinese text of Boksik Jigu into Korean. This sub-section in the Seomyongji chapter will facilitate an investigation into the information contained therein on attire and accessories.

• Journal of the Korean Society of Costume
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• v.57 no.2 s.111
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• pp.100-114
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• 2007

This study reports the dress style of Daesarye ceremony participants in the Yeong-Jo Era. The King Yeong-jo attending the archery practice ceremony wears Ikseonkwan(翼善冠), Golryongpo(袞龍袍), Okdae(玉帶), and Heukpihwa(黑皮靴) while royal family members and officers in the ceremony wear Heukdalryeong(黑團領). Each officer in Sangbok(常服) who shoots arrows wears a ring and a wristlet with an archery case on his waist. King's bodyguards wear Yungbok(戎服) or Sangbok(常服). Especially, Muyaebyeolgam(武藝別監) wears Hong-geon(紅巾) and a green Jikryeong(直領). Yujiang-gun(儀位軍) wear Pirip(皮笠) and Hongjuryi(紅紬衣) while Hyeopryeongun(狹輦軍) and Hyeopryeogun(狹輦軍) wear Hong-geon(紅巾), Hongyui((紅衣), Cheonghaengjeon(靑行纏), Hakchang(鶴雲), Hongmokdae(紅木帶), and Unhye(雲鞋). Gyeonmabae(牽馬陪) wear Hwangchorip(黃草笠) and Hwangyui(黃衣). Seupjeongun(拾箭軍) and Hwaekja(獲子) wear Jageon(紫巾), Jayui(紫衣), and Unhye(雲鞋). Jeonak(典樂) wears Mora- bokdu and Noksayui(綠抄衣), while Ak-kong(樂工) wear Hwahwabokdu, Hongjuyui(紅紬衣), Ojeongdae, and Heukpihwa(黑皮靴). Lastly, Hyeopryulrang(協律郎) wears Heukdalryeong(黑團領).

• Korean Journal of Applied Biomechanics
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• v.17 no.3
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• pp.197-207
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• 2007

It has been reported that Back-Tension played a significant role in archery (Lee & Bondit, 2005; Kim, 2007) but there are a few researches related Back-Tension in Korea recently. Therefore, the purpose of this study was to investigate archery back tension technique for the second ranked archer in the World and to find ways to improve performance. A subject(height: 185cm, mass: 82kg, years: 21yrs, careers: 12yrs) who is a number of national team and the second ranked archer in the World authorized by FITA (Federation Internationale de Trial Arc) was perticipated in this experiment. When shooting 60 shots($12{\times}5$), shooting motions were recorded with 7 infrared cameras and 2 ultrahigh-speed cameras. A QTM and an Auto Track were used to acquire raw data. The sampling rates of both cameras were 200 Hz. and 1000 Hz. respectively and data were filtered using a fourth order Butterworth low pass filtering with a cutoff-frequency of 30Hz. The parameters were calculated with Matlab6.5 and analyzed with SPSS11.0. After Pearson's correlations between 8 parameters were analyzed, 5 parameters from 13parameters that affected records were analyzed with multiple regression analysis (Enter order: x1, x2, x3, x4, x5). The results were as follows: 1. Comparing between parameters according to scores, the patterns of horizontal and vertical angular velocity(av.) of scapular relative angle was different between 8 score and 9 or 10 scores. 2. The correlations of parameters that affected records were a horizontal av.(x1, p=.032<.05) and a vertical av.(x3, p=.033<.05) of scapular from release to delivery in KB back-tension (anchoring-delivery). 3. The decision coefficients(R2) of above two parameters and three parameters selected by experts that may affect record, that is, an absolute trunk angle(x4) from in KKC back-tension (anchoring-release) and a horizontal relative scapular angle(x2) and an absolute trunk angle(x5) from release to delivery in KB back-tension were 7.7%(x1), 0.1%(x2), 8.5%(x3), 0.7%(x4) and 0.9%(x5) in sequence. 4. The multiple regression equation was a y= -1.16E-2 x1 + 0.109 x2 + 3.437E-2 x3 + 6.139E-2 x4 + 0.117 x5 + 3.420 In conclusion, a total contribution was low, that is, R2(17.9%) suggested that on the one hand, Lim's motion may not depend on a certain factor because his postural factors affected shooting motion are some stable on the other hand, unknown factors may exist(e.g. psychological, physiological factors etc.). Further study of EMG patterns of muscles and anatomic consideration related to shoulder girdle and scapular bones may help to identify mechanism of Back-Tension.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.37 no.1
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• pp.121-127
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• 2013

With the continuing demand for lightweight bicycles, carbon fiber composite materials have been widely used in manufacturing bicycle frames and components. Unlike general isotropic materials, the structural characteristics of composite materials are strongly influenced by the staking directions and sequences of composite laminates. Thus, to verify the design process of bicycles manufactured using composites, structural analysis is considered essential. In this study, a carbon-fiber-reinforced plastic (CFRP) bicycle frame was designed and its structural behavior was investigated using finite element analysis (FEA). By measuring the failure indices of the fiber and matrix under various stacking sequences and loading conditions, the effect of the stacking condition of composite laminates on the strength of the bicycle structure was examined. In addition, the structural safety of the bicycle frame can be enhanced by reinforcing weak regions prone to failure using additional composite laminates.

• Journal of Convergence for Information Technology
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• v.8 no.1
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• pp.173-177
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• 2018

This study compared the muscle on-set time of fully immersive virtual reality motions with that of actual motions to if there difference. The subjects were 30 healthy adults subjects and compared the virtual reality moction group(punch, archery) and actual motion group(punch, archery) muscle on-set time. In this study, there was no significant difference between the virtual reality motion group and actual motion group muscle on-set time(p>0.05). Fully immersive virtual reality is deemed to be applicable for use in physical therapy. In future studies, it is necessary to investigate whether a fully immersive virtual reality can be applied to patients.

• Korean Journal of Oriental Medicine
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• v.2 no.1
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• pp.1-25
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• 1996

The purpose of this paper is to study the basic medicine of the Gojoseon(古朝鮮) dynasty, especially 5 fields which are the theory of yin-yang(陰陽論), the theory of 5 progressive phasis(五行論), the theory of mind-body(心身論), Seon-gyo(仙敎), acupuncture(鍼術). The theory of yin-yang can be studied in the point of contents of it, not the name of it. Whan-in(桓因) is the god of sky, Woong(熊) is the god of earth. Whan-woong(桓雄), who is the son of Whan-in(桓因), came down from the sky, turned into a man. Woong(熊) lived in the cave, eating garlic and wormwood for 21days, got out of it and turned into a woman. The changes occurred by the mutual aid of Whan-woong and Woong. The theory of 5 progressive phasis can be founded in the archery. The bow and arrow is made of cucumber, horn and ligament of cow, glue made from airbladders of sciaenoid fish, which belong to mock(木). Beejeongbeepal(非丁非八) and make strong one's abdomen(腹實) belong ti soo(水), empty out one's chest(胞虛) belongs to whar(畵), thrusting(前推泰山) belongs to mock(木), shooting(發如虎尾) belongs to geom(金). Basically mind and body have no differance. Mind without body does not exist. Exocism excites the exorcist to the condition of whar(火). There are 3 parts, as treaLment, prevent, regimen, in the medicine. 2 parts as idealism and realism are in regimen. Seon-gyo(仙敎) belongs to the idealism of regimen. In China, is became Taoism(仙敎) later The art of accupunture was developed in the Gulf of pohair(渤海灣).

• Korean Journal of Applied Biomechanics
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• v.30 no.2
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• pp.131-144
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• 2020

Objective: The purpose of this study was to examine the effect of degrees of freedom on the multi-synergies in two hierarchies of human hand system during force production and releasing tasks. Method: In this study, the constrained movements of the aiming and releasing actions using both hands and fingers during archery-like shooting were implemented as experimental tasks. The participants produced a pulling force holding the customized frame (mimicking an archery bow, with a set of force transducers) and kept it consistently for about 5 seconds, and released fingers as quickly as possible in a self-paced manner within the next 5 seconds. An analytical method based on the uncontrolled manifold hypothesis was used to quantify the stability index (synergy index) in two hierarchies including two hands (upper hierarchy) and individual fingers (lower hierarchy). Results: The results confirmed that the positive synergy pattern showed simultaneously at the upper and lower hierarchies, and the kinetic degrees of freedom were associated with the increment of hierarchical synergy indices and the performance indices. Also, the synergy indices of both hierarchies showed significant positive correlations with the performance accuracy during the task. Conclusion: The results of this study suggest that the human control system actively uses extra degrees of freedom to stabilize task performance variables. Further increasing the degree of freedom at one level of hierarchy induces positive interactions across hierarchical control levels, which in turn positively affects the accuracy and precision of task performance.

• PNF and Movement
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• v.17 no.2
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• pp.283-291
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• 2019

Purpose: The purpose of this study was to investigate the effects of trunk stability training on static balance and game records among archers. Methods: The subjects comprised 24 voluntary archers in middle and high school (aged 14-19 years). All the subjects received trunk stability training for an hour per day 3 days a week for 4 weeks. The Tetrax balance system was used to measure the stability index of the subjects' static balance. The subjects' game records were scored using a single FITA round system. All the subjects were measured before the intervention, 2 weeks into the intervention, and 4 weeks after the intervention, with a follow-up measurement 2 weeks later. Results: The results of this study showed that the stability index was significantly different across all the measuring positions after the intervention (p<0.05). Furthermore, the results of the measurements of the standing position with eyes open and closed were significantly different before the intervention compared to 4 weeks after the intervention (p<0.05). The archery position with the head turned to the left and eyes closed was also significantly different pre-intervention compared to 2 weeks after the start of the intervention (p<0.05). Additionally, the archery records were significantly different after the intervention (p<0.05), as well as before the intervention and 4 weeks after the intervention (p<0.05). Conclusion: Trunk stability training can improve static balance in archers. It may also be helpful in improving athletic performance and maintaining the life of the athlete. Accordingly, trunk stability training may prevent and resolve injuries through careful management when playing one-side sports.

• Fashion & Textile Research Journal
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• v.3 no.2
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• pp.124-130
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• 2001

It is said that the highlights of Naadam festival, the biggest festival of the year in Mongolia, are three athletic contests: wrestling, horse racing, and archery, where contestants display their courage, strength, dexterity, and marksmanship. This paper explores the characteristics of the uniforms worn in such athletic events The findings are as follows. First, wrestlers' costume is completely unique in that it consists of shuudag, snug shorts, zodog, a jacket with sleeves but with no front, a traditional hat, and gutul, traditional boots. The main material used in the costume is several pieces of embroidered red or blue silk. Second, horse riders, usually young children lighter than the adults in weight, wear a bright, colorful, and comfortable uniform of a simple jacket and a pants. Third, archers' mostly put on their traditional costume, deel and hats. The hats are of two kinds: the traditional ones or the European-style ones for men, which were introduced around 1930s.