• 한국운동역학회지
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• 제21권5호
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• pp.631-638
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• 2011

This study had two purposes. The first was to analyze the period of the final record set by the male shot-putters in the IAAF World Championships, Daegu 2011 from the point of view of kinematics. The other was to identify an efficient movement for shot putting based on the analysis. The research used the eight finalists of in the championship as subjects. We analyzed the seven most important kinematic factors in shot putting based on the type of technique: the execution time of the delivery phase, release velocity, release angle, release, center of mass (COM) velocity, and shot trajectories. The analytical results showed the following average figures for the record 12 meters: execution time of the delivery phase: (0.19 s), release height: (2.06 m), release angle: ($34.68^{\circ}$), release velocity: (13.25 m/s), angular velocity of shoulder: ($922.38^{\circ}/s$), and angular velocity of pelvis: ($479.50^{\circ}/s$). Further, the results showed that the highest COM velocity was 2.25 m/s and the shot trajectories were close to a straight line in the release phase.

• 한국ITS학회 논문지
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• 제9권6호
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• pp.54-62
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• 2010

차 대 보행자 교통사고는 다른 유형의 사고에 비해 피해가 매우 크고 사고의 비중도 높으나 사고의 특성 상 과학적 접근이 어렵다. 기존 보행자 사고에 관한 연구의 대부분은 차 대 보행자의 충돌 실험에 대한 실험식 도출에 집중되어 있고, 실험식에서 중요한 변수로 작용되는 인체 활주 마찰 계수에 대한 연구가 부족한 실정이다. 본 연구에서는 인체와 노면간의 마찰계수에 대한 현장실험을 실시하여 이에 대한 실험값을 측정하여 제시하였다. 본 연구에서 조사된 인체노면 마찰계수 값은 건조한 아스팔트 도로에서 0.59~0.62, 건조한 콘크리트 도로는 0.59~0.61로 측정되었다. 또한, 젖은 아스팔트와 콘크리트 도로에서는 각각 0.56~0.59, 0.51~0.54로 나타나 건조한 노면 상태와 비교하여 5.0%와 8.3% 감소하는 것으로 파악되었다. 도출된 마찰계수를 시뮬레이션 프로그램을 이용하여 검증한 바, 실험 수치와 시뮬레이션 결과가 유사함을 확인하였다. 본 연구결과를 활용하여 국내 교통사고 조사 시 사용되는 인체 마찰계수의 적용 값의 범위를 축소할 수 있고, 이는 사고 조사의 정확성 향상에 큰 도움을 줄 것으로 기대한다.

• 한국의류산업학회지
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• 제15권2호
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• pp.294-301
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• 2013

Sustainable fashion & textile is more than eco fashion & textile with the concepts for the next generation's happiness, prosumer value, and community responsibility. This study considers methods to enhance fashion and textile industry sustainability in accordance to clothing types (material, product life and washing properties) and to investigate company strategies. Company strategies are of redesign with stock, volunteering & measuring trash amount, participation by evaluation stores, clerk environment education, hiring QC specialist and reinforcing partnerships. For the case of daily innerwear, throwing away and recycling is more efficient for the environment than laundering in the consumer use stage; subsequently, we recommend the use of polypropylene fiber (a cheap and an eco-friendly material) for this item that can be recycled and reformed after use. For the case of single layer clothing (such as sportswear, blouse or pants) we recommend the use of thermoplastic materials with welding or fuse assembling technology instead of a sewing method of seams as well as the recycle design that is simply melted and reformed into new clothing without an after use dissembling process. Secondhand use or resale is suitable for denim/jean items if the clothing has a storytelling or private history tag. Lastly, module-type jacket or coat shows the variety of styles with one clothing worn w/o collar or sleeve details and changed into vest/coat; in addition, it is possible to add or partly tear off some jacket/coat fibers of the felt material to reform it into a new design.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 추계학술대회
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• pp.1892-1897
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• 2003

A new thermal inkjet printer head on SOI wafer with virtual valve was proposed. It was composed of two rectangular heaters with same size. So we could call it T-jet(Twin jet). T-jet has a lot of merits. It has the advantage of being fabricated with one wafer and is easy to change the size of chamber, nozzle, restrictor and so on. However, above all, It is the best point that T-jet has a virtual valve. And it was manufactured on SOI wafer. The chamber was formed in its upper silicon whose thickness was 40um. The chamber's bottom layer was silicon dioxide of SOI wafer and two heaters were located underneath the chamber's ceiling. And the restirctor was made beside the chamber. Nozzle was molded by process of Ni plating. Ni was 30um thick. Nozzle ejection test was performed by printer head having 56 nozzles in 2 columns with 600NPI(nozzle per inch) and black ink. It measured a drop velocity of 12m/s, a drop volume of 30pl, and a maximum firing frequency of 12KHz for single nozzle ejection. Throwing out the ink drop in whole nozzles at the same time, it was observed that the uniformity of the drop velocity and volume was less than 4%.

• 한국운동역학회지
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• 제24권3호
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• pp.217-227
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• 2014

The purpose of this study was to investigate the relationship between distance and factors of javelin in korean male's javelin throwing. To accomplish this purpose, the analyzed trail selected total 29 trails (subjects 9) recorded more than 65 m in the 93rd National Sports Festival. The Kwon3D 3.1 version was used to obtain the three dimensional coordinates about the top, grip, end of javelin. And the kinematic data such as projection factors and direction angle of javelin calculated using Matlab2009a program. The statical analysis on the records (n=29) were used to Pearson's product moment correlation coefficient. There was a statistically positive relationship between the records and horizontal velocity (r=.866, ${\rho}$<.01), height (r=.541, ${\rho}$ <.001), height rate (r=.373, ${\rho}$ <.05) and horizontal displacement of javelin (r=.749, ${\rho}$ <.01), but the medial/lateral velocity showed a negative relationship to r=-.663 (${\rho}$ <.01). The attack and yaw angle showed not a significant relationship between the records, but the medial-lateral tilt (E1:r =-.557 [p<.01)] E2:r=-.629 [${\rho}$<.01], E3:r=-.528 [${\rho}$ <.01]) and attitude angle (E2:r=-.629 [[${\rho}$<.01], E3:r=-.619 [${\rho}$ <.01]) of javelin showed a negative relationship between the records, as well as the projection angle of javelin (r=-.419, ${\rho}$ <.05) showed a negative relationship between the records.

• 대한물리의학회지
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• 제13권2호
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• pp.11-19
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• 2018

PURPOSE: The aim of this study was to identify the effects of joint mobilization intervention combined with exercise on range of motion (ROM), pain intensity, and functional performance in adolescent baseball players with internal impingement syndrome of the shoulder. METHODS: The subjects were 30 adolescent baseball players diagnosed with internal impingement. Ten subjects were randomly assigned to each of 3 groups: Group 1 (exercise only), Group 2 (joint mobilization combined with exercise), and Group 3 (rest-only control group). Three weekly interventions were given for 4 weeks (the control group rested for 4 weeks). The main outcome measures were goniometer, visual analogue scale (VAS), and Korean Kerlan Jobe shoulder-elbow (K-KJOC) scores. The ROM (external and internal rotation), pain intensity (at the moment of throwing), and functional performance were compared among the groups. RESULTS: No significant difference was observed among the groups in the range of external rotation of the shoulder before and after the intervention, but the range of internal rotation was significantly increased in Group 2 compared to Groups 1 and 3. Pain intensity was significantly lower in Group 2 than in Group 1 and 3, and functional performance was significantly increased in Group 2 compared to Group 1 and 3. CONCLUSION: An intervention that combined joint mobilization with exercise was more effective than resting or exercise alone for rapid recovery from sports injury and improvement in athletic performance.

• Clinics in Shoulder and Elbow
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• 제8권2호
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• pp.63-67
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• 2005

이상의 보고에서 임상의 들은 청소년기 운동선수에서 주관절 동통이 있을 때 반드시 골연골염에 대한 주의가 필요하며 비록 치료방법 및 예후에 있어 아직도 많은 논쟁은 있으나 초기발견이 매우 중요한 예후결정의 요소가 된다는 것을 주지하여야 한다. 많은 경우에 있어 초기에 보존적 치료시 증상의 호전 및 기능의 회복 그리고 운동으로의 복귀가 가능하다. 그러나 보존적 치료로 호전이 되지 않을 때 수술적 치료를 고려해야 하는데 이 때 수술적 치료 선택에 매우 신중해야 하며 수술적 적응증 역시 반드시 숙지하여야 한다.

• 한국측량학회지
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• 제18권3호
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• pp.233-240
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• 2000

소하천은 지역주민에게 아름다운 경관과 놀이공간 및 휴식장소를 제공할 뿐만 아니라 중요 용수원이자 배수로로 활용되는 지역주민의 가장 밀접한 생활공간의 일부이며 수변의 각종 식물이나 동물이 인간과 가장 조화롭게 공존하는 공간이라 할 수 있다. 이런 소하천에 대한 정비 계획을 수립하는데 여러 가지의 방향과 모델이 제시 되어왔으나, 소하천은 다양한 변화와 많은 재원이 투입해야 하는 어려움이 있다. 소하천 정비계획은 일반하천의 정비계획과 달리 관할구역내 모든 소하천을 대상으로 일시에 수립해야 하는 계획으로 정비 우선순위 결정이 선행되어야 한다. 현재 소하천 우선순위 결정을 실시한 지역은 아직 미미한 편이며, 처리를 했다 할지라도 처리 작업이 모두 수작업으로 많은 시간이 소요되고 있다. 그러므로 지리정보시스템은 공간 자료의 분석과 관리를 위한 도구로, 소하천에 대한 정비 우선순위 결정을 위해 사용된다면 많은 도움을 줄 수 있을 것이다. 이 연구의 목적은 지형공간정보체계를 사용함으로써 소하천 정비에 있어 효율적인 우선순위 결정을 위한 것으로 소하천의 빈번한 우선순위 결정인자 변화에 신속히 대응할 수 있도록 하였다.

• 사상체질의학회지
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• 제21권2호
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• pp.72-78
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• 2009

1. Objectives : This paper was written in order to understand the origin and changes of Galgeunhaegi-tang. 2. Methods : We analysis Galgeunhaegi-tang through pathology and new prescription in "Donguibogam(東醫寶鑑)", "Chobongwon(草本卷)", "Gabobon(甲午本)" and "Sinchukbon(辛丑本)" of "Dongyi Suse Bowon". 3. Results and Conclusions : We can find the first origin of Galgeunhaegi-tang in "Sinchukbon(辛丑本)" in "Donguibogam(東醫寶鑑)" which invelves Galgeunhaegi-tang in the categories of pestilence(瘟疫) and Yangmyeonggyeongbyeong(陽明經病). Also, we can find the origin in Jugoeng(朱肱)' Jojung-tang. Seungeumgalgeun-tang in the "Chobongwon(草本卷)" developed by a Galgeunhaegi-tang of "Gabobon(甲午本)", and Galgeunnabokja-tang in the "Chobongwon(草本卷)" developed by a Galgeunhaegi-tang of "Sinchukbon(辛丑本)". It is considered that Galgeunhaegi-tang of "Gabobon(甲午本)" solves heat depression(鬱熱), due to not throwing off, by using Galgeun(葛根) and Daehwang(大黃), and accompanied dryness(燥) by using Hangin(杏仁) and Sanjoin(酸棗仁) which moisten dryness(燥). It is considered that Galgeunhaegi-tang of "Sinchukbon(辛丑本)" solves heat depression(鬱熱) by using Galgeun(葛根) and accompanied dryness(燥) by using Gobon(藁本) which sets free dryness(燥).

• 디지털융복합연구
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• 제14권12호
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• pp.525-535
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• 2016

본 연구는 고등학교 야구선수를 대상으로 운동 전 탄력밴드를 이용한 1회성 동체 PNF 스트레칭 운동을 통해 동체의 관절가동범위 및 구속변화에 어떠한 영향을 주는지를 알아봄에 연구의 목적이 있다. 이를 위하여 현재 I 광역시 소재 고등학교 소속 야구선수 11명을 대상으로 동체 PNF 스트레칭을 던지는 팔을 중심으로 전방 및 후방향으로 각 30회 실시한 후 동체 관절가동범위와 구속을 측정하였으며, 결과는 다음과 같다. 첫째, 동체 PNF 스트레칭 운동 후 동체 관절가동범위는 유의한 증가를 보였다. 둘째, PNF 스트레칭 운동 후 최고, 최저 및 평균구속은 유의하게 증가하였다. 셋째, PNF 동체스트레칭 운동 후 선수들의 투구시 힘듦 정도는 유의하게 감소하였다. 이러한 결과는 야구선수들의 탄력밴드를 이용한 1회성 동체 PNF 스트레칭 운동을 통해 ROM 증가 및 구속증가를 기대할 수 있음을 나타낸다.