족저압력분포 측정장비를 이용한 골프 스윙시 족저압 분석

이동기,이중숙,이범진,이훈식,김용재,박승범,주종필 한국운동역학회 2005 한국운동역학회지 Vol.15 No.1

D. K. LEE, J. S. LEE, B. J. LEE, H. S. LEE, Y. J. KIM, S. B. PARK, J. P. JOO. PIantar foot pressure analysis during golf swing motion using plantar foot pressure measurement system. Korean Journal of Sport Biomechanics, Vol. 15, No. 1, pp. 75-89, 2005. In this study, weight carrying pattern analysis and comparison method of four foot region were suggested. We used three types of club(driver, iron7, pitching wedge). This analysis method can compare between top class golfer and beginner. And the comparison data can be used to correct the swing pose of trainee. If motion analysis system, which can measure the swing speed and instantaneous acceleration at the point of hitting a ball, is combined with this plantar foot force analysis method, new design development of golf shoes to increase comfort and ball flight distance will be available. 1. Address acting, forces concentrated in rare foot regions and lateral foot of right foot. Back swing top acting, relatively high force occurred in medial forefoot region of left foot and forefoot region of right foot. Impact acting, high force value observed in the lateral rarefoot region of left foot and medial forefoot region of right foot. Finish acting, force concentration observed on the lateral region and rarefoot region of left foot. 2. Forces were increased in address of right foot with clubs length increased. All clubs, back swing top acting, high force value observed in the lateral forefoot region of right foot. All clubs, in impact, high force value observed in the lateral rarefoot region of left foot and medial forefoot region of right foot. Finish acting, force concentration observed on the rarefoot region in driver and lateral foot region in iron on left foot. 3. Right foot forces distribution were increased in address, back swing top and left foot force distribution were increased in impact, finnish

단결정 Si(111) 위에 형성된 Ti-실리사이드에 대한 RBS 및 XRD 분석

이중환,권오준,최치규,박동수,김건호,이상환,이의완,곽호원 濟州大學校 基礎科學硏究所 1991 基礎科學硏究 Vol.4 No.1

초고진공 상태에서 p형 Si(111)기판에 Ti을 증착한 후 고진공에서 열처리하여 Ti-실리사이드를 형성시켰으며, Ti-실리사이드의 상전이 및 형성운동학은 2 MeV⁴He? 이온 후방산란과 x-선 회절방법으로 규명하였다. 형성된 TiSi₂는 결정학적으로 C49(ZrSi₂)와 C54 구조의 두 종류로 확인되었다. C49 TiSi₂상은 열처리온도가 700℃이하의 저온에서 형성되었고, 700℃ 이상의 고온에서는 C54 TiSi₂상으로 나타났다. 본 연구에서 확인된 C54 TiSi₂전이온도(??)는 700℃ 였고, TiSi₂형성온도 영역내에서 TiSi₂ 층두께(χ)와 열처리시간(t)의 관계는 저온(700℃ 이하)일 경우 ??이고, 고온(750℃ 이상)에서는 χ=ct+d 의 관계식이 만족됨을 알 수 있었다. 이것은 700℃ 이하에서 TiSi₂ 형성기구가 Si 확산에 의해 제어되며, 750℃ 이상에서는 핵형성 제어에 의하여 계면반응하는 것으로 나타났다. Titanium silicides were prepared by depositing titanium film on p-type Si(111) followed by annealing in ultra high vacuum. The growth kinetics of Ti-silicide has been studied by using ion backscattering spectrometry and x-ray diffractometry. Two crystallographic structures of Ti-silicide were identified the (ZrSi₂)structure and C54. The C49 TiSi₂ phase was formed at low annealing temperature(<700℃),and it transformed to the C54 phase over 700℃. The relation between the thickness of TiSi₂ layer(χ) and the annealing time(t) was ?? when annealing temperature was under 700℃ and χ=ct+d when that was over 750℃. The former implied that the formation of TiSi₂ was controlled by diffusion and the latter by nucleation of at the Ti/Si(111) interface.

산탄총창(散彈銃創) 2예 보고

이봉우,서중석,이상용,이원태 大韓法醫學會 1999 대한법의학회지 Vol.23 No.2

Shotguns were developed as an alternative to single-missile rifle or handgun in order to enable gunner to spray a wide area with shot and thus kill birds and small animals too difficult to hit with single-missile weapons. As the popularity of shotguns grew, ammunition was developed for large game. The use of shotguns on humans has been markedly increasing in various manner of death. In forensic aspect, the shotgun wonds gave characteristic findings due to their own characteristics and medical examiners may determine the range, distance, direction and kinds of gun. When the muzzle of the shotgun is placed tightly against the surface of the abdomen or thorax, the consequent wound of entrance will be single in number and circular in shape, and will have a diameter approximately equal to that of the bore of the weapon. However, when the wound is made over a site with underlying bone, especially in the scalp, the wound may have a different appearance, showing star shaped entracce due to short to mid-range, considerable variation occurs in the appearance, showing star shaped entrance due to tears from the sides of the wound and accompanying soot and burn effect. When the muzzle is held short to mid-range, considerable variation occurs in the appearance of the wound. We report two cases of shotgun wounds which showed typical findings of contact shots and distant shots.

한국인 관상동맥의 변화양상에 대한 형태학적 연구

이상용,권태정,정낙은,서중석,이한영,이원태 大韓法醫學會 2002 대한법의학회지 Vol.26 No.1

디버링 작업을 위한 로봇 제어기 개발

이중훈,박근우,이성학,이민기 國立 昌原大學校 産業技術硏究所 1999 産技硏論文集 Vol.13 No.-

This paper presents the controller of a double parallel robot manipulator applied for deburring work. This is one of the least favored works because of dust, noise, vibration, and accidental injury. A serial robot manipulator has been limitedly applied to light-load deburring work due to the poor stiffness of the manipulator. A double parallel robot manipulator has been developed for a strong rigidity by stacking two parallel mechanisms. It can be applied to heavy-load deburring work with high stiffness. To apply the robot to cut the burrs on a unknown geometric surface, this research will develop an intelligent controller to measure bur track and cut it with a constant cutting force.

녹차 및 결명자 추출물의 치주조직병 원인균에 대한 억제효과

이은숙,안태영,윤정중,국중기,이병래,김동기 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.4

It is known that the periodontal disease is caused by infection of inner oral bacteria as a suffering disease to human mankind for a long time. It can make the various clinical symptoms such as gingiva, bleeding, formation of periodontal pocket, loss of attached gingiva, collapse of alveolar bone and halitosis, and is known to the major contributor of loss of teeth. This study investigated the growth restraint effect of Camellia sinensis and Casia tora. As a result of study, the minimum restraint concentration of standard microbe on F. nucleatum for extracts from C. sinensis showed 2.5, 0.63 and 1.25 mg/ml, respectively and minimum restraint concentration of clinical separation microbe on F. nucleatum for extracts from C. sinensis showed 2.5 and 5.0 mg/ml. The minimum restraint concentration of standard microbe and clinical separation microbe, respectively. Meanwhile, the minimum restraint concentration of standard microbe and clinical separation microbe on F. nucleatum for extracts from C. tora showed 2.5 and 2.5-5.0 mg/ml, respectively. The minimum restraint concentration of standard microbe and clinical separation microbe for P. intermedia, P. nigrescens, P. gingivalis, and P. endodontalis showed above 5.0 mg/ml for standard microbe and above 5.0 mg/ml for clinical separation microbe, respectively. As a result of investigating the cell toxicity for each extracts, extracts from C. sinensis does not showed the toxicity for the cell below the concentration of 2.5 mg/ml, but it showed toxicity for the cell above concentration of 2.5 mg/ml and it decreased the existence ratio for the cell. Meanwhile, in the case of C. tora, it increased the multiplication ratio below the concentration of 1.25 mg/ml compared to the subject group and it decreased gradually the multiplication ratio that the growth ratio for the cell is increased better than subject group. As a result of this study, extracts from C. sinensis was more effect on the growth restraint effect against periodontopathogens than extracts from C. tora and is proven that it is possible for use as a oral mouthrinsing liquids in the near future. On the basis of results of this study, it is judged that the study for reaction mechanism and discrete clinical test for implementation should be needed.

이축시험법에 의한 알루미나 세라믹스의 열충격파괴거동

이중현,박성은,이형직,이홍림 연세대학교 산업기술연구소 2001 논문집 Vol.33 No.1

The flexure strength distribution was observed with ball-on-3 ball test after thermal shock in 25℃ distilled water. Commercial alumina specimen(AES-11) was used, and after thermal shock and flexure test crack distribution was observed by dye-penetration. Statistical method for failure probability and comparison of failure probability of ball-on-3 ball test with that of 3-point bending test were studied. The nearest crack distance from the center of the specimen and crack density were considered as the factors affecting ball-on-3 ball test strength, and the nearest crack distance from the center of the specimen had a stronger effect on the flexure strength than crack density.

Isolation and Transcriptional Expression of CuZn Superoxide Dismutase from Codonopsis lanceolata

Lee,Kang,In,Jun-Gyo,Yu,Chang-Yeon,Yun,Song-Joong,Min,Byung-Hoon,Rho,Yeong-Deok,Kim,Moo-Sung,Yang,Deok-Chun 한국자원식물학회 2004 Plant Resources Vol.7 No.3

To investigate the defense mechanism against the abiotic stress, a cDNA clone encoding a CuZn superoxide dismutase (CuZnSOD) protein was isolated from a cDNA library prepared from tabroot mRNAs of Codonopsis lanceolata. The eDNA, designated ClSODCc, is 799 nucleotides long and has an open reading frame of 459 bp with a deduced amino acid sequence of 152 residues. The deduced amino acid sequence of ClSODCc matched to the previously reported CuZnSODs. Consensus amino acid residues (His-45, -47, -62, -70, -79, -119 and Asp-82) were involved in Cu-, Cu/Zn-, and Zn- binding ligands. The deduced amino acid sequence of ClSODCc showed high homologies (82%-86%) regardless of species. Expression of ClSODCc by oxidative stress was increased up to 1 h after treatment and declined gradually. Much earlier and stronger expression of ClSODCc was observed in the cold stress treatment.

Detection of Puumala and Hantaan Viruses among Bats in Korea by Nested RT-PCR

Lee, Yun-Tai,Yun, Bo-Kyoung,Yoon, Jeong-Joong The Korean Society of Virology 1998 Journal of Bacteriology and Virology Vol.28 No.2

Hantavirus is a genus of the Bunyaviridae family consisting following serotype groups: Hantaan, Seoul, Puumala, Prospect Hill, Thailand, Belgrade, Thotta palayam, Sin Nombre. Most of Hantavirus group have been associated with many clinically similar disease known collectively as hemorrhagic fever with renal syndrome (HFRS). Hantaan virus is the prototype of the genus hantavirus, originally isolated from Apodemus agrarius. Bat was found as a natural host for Hantaan virus in Lee's lab for the first time. Then, Hantaan-like virus was isolated Hantaan-like virus from bat. To identify hantaviruses that are present in Korea among bats, bats were collected from Jeong-Sun, Won-Joo, Chung-Ju and Hwa-Cheon area, RNA was isolated from lung and serum. RT-PCR was performed with a universal primer from M segment. Nested RT-PCR was carried out to differentiate Hantaan, Seoul and Puumala virus using serotype specific primers. As we expected, Hantaan viruses were detected in bats and Seoul virus was not detected. Interestingly, Puumala viruses were also detected in bats from Won-Ju, but not in other areas. Puumala virus is originally isolated from Clethrinomys glareolus, and cause light HFRS. Recently, Paradoxomis webbiana, a wild bird turn out to be a reservoir for Puumala virus in Korea. These data indicate that bat is a new natural reservoir of Puumala virus.

대구지역 치과의사들의 누적외상성 장애에 대한 조사

전만중,사공준,이중정,이희경,정종학 大韓産業醫學會 2001 대한직업환경의학회지 Vol.13 No.1

목 적 : 치과의사를 대상으로 누적외상성 장애의 증상유병률 및 양상을 조사하고 그 관련요인을 규명하여, 다양한 직종별 데이터 베이스 구축에 기초자료 제공 및 직종별 비교를 통한 누적왁상성 장애의 예방대책수립에 도움이 되고자 시행하였다.방 법 대구광역시에서 진료행위를 하고 있는 치과의사 512명을 대상으로 인구학적 요인과, 진료관련특성, 사회심리적요인, 자각증상에 대해 설문 조Al하였다. 사회심리적 특성으로는 직무요구도(5항목), 정신신체적 긴장도(5항목), 직무불만족도를 측정하였으며(Karasek, 1994), A형 행동양상도 함께 측정 하였다.자각증상에 대한 조사는 송동빈 등(1997)에 의해 개발된 자각증상 설문지를 이용하였으며 목, 어깨, 팔 및 팔꿈치, 손목, 손가락, 등에 통증이나 쑤심, 저림등의 불편한 증상과 관련된 변수들을 조사하였다.조사된 결과는 N10SH의 근골격계장애에 대한 감시를 위 한 기준을 적용하여 분석하였다.결 과 : N10SH 감시기준에 의한 누적외상성 장애 증상호소율이 63.3 %로 높게 나타났으며, 그 증상호소부위는 어깨, 목, 허리, 손과 손목, 무릎, 발과 발목의 순이였다. 진료위치는 9시에서 10시 방향에서의 접근이 가장 많았으며 이들 중 어깨 부위의 증상호소율이 가장 높았다.근무경력은 5년에서 10년 사이가 가장 많았으며 이들도 목과 어깨부위의 증상호소율이 가장 높았다.대상자들이 주로 보는 환자에 따른 증상 호소율은 치주치료를 주로 하는 경우 증상호소율이 가장 높았으며, 연령별로는 30~◎세에서 증상호소율이 70 %로가장 높았다. 성별로는 여성에서 증상호소율이 높았으며, 미흔인 대상자에서 증상호소율이 높게 나타났다. 일일 진료환자수에 따른 증상호소율은 21명 이상을 진료하게 되는 군에서 70 %로 가장 높았다.로지스틱 회귀분석을 한 결과 정신신체적긴장도와직무요구도가 높을수록 누적외상성 장애의 증상호소가 높은 것으로 나타났다. 또한 A형 행동양상을 보일수록증상호소가 높았으며, 쳐근 3개월 동안에 진료위치를 변경한 경우도 증상호소가 높은 것으로 조사되었다.결 론 : 조사한 일반적, 직업적 특성, 진료판련특성 및 사회심리학적 특성을 독립변수로 하여 다변량로지스틱 회귀분석 결과 여성에서 누적 외상장애증상발현위험이 남성에 비해 높은 것으로 조사되었으며,정신신체적 긴장이 높을수록, A형 행동양상 일수록누적외상성 장애증상 발현위험이 높았다. 위의 결과로 볼 때 치과의사의 경우 숙련되고 섬세한 근골격계운동을 지속적으로 반복해야 한다는 특성파 불안정한자세를 장시간 취해야 한다는 작업적 특성으로 인한근골격계 장애의 발생은 물론이고 환자 만족도에도신경을 써야하는 등의 정신적 스트레스도 누적외상성장애를 일으킬 수 있는 위험요인이라 할 수 있겠다. Objective : To investigate the symptom prevalence and aspects of symptoms for cumulative trauma disorders in dentists and elucidate their associated factors. Methods : A questionnaire-based investigation on demographic factors, work-related characteristics, psychosocial factors and symptoms of 512 dentists practicing in Daegu metropolitan city was conducted. Subsets of psychosocial characteristics, including job demand(5 items), psychosomatic strain(5 items), job insecurity, and type A behavior were also assessed. For the evaluation of symptoms early developed questionnaire by Song (1997) was used to investigate the parameters related to pains in the neck, shoulder, arm and elbow, wrist, finger, back or discomforts, such as pricking and numbing. Results : The symptom prevalence of cumulative trauma disorders, calculated based on NIOSH criteria, was high at 63.3%; the most frequent site of complaint was the shoulder, followed by neck, back, hand and wrist, knee, foot and ankle. The most common approach position was direction of 9 to 10 o'clock. Most subjects had 5-10 years of work experience and those with such years of experience also complained most frequently of symptoms in the neck and shoulder areas. As to rate of symptom complaint according to the type of dental procedure, the highest rate was associated to periodontic treatment. According to age, those between the age of 30-40 had the highest symptom prevalence rate at 70 %. According to sex, women had the higher symptom prevalence rate. Unmarried subjects also had higher symptom prevalence rate. The results of logistic analysis showed that the higher the psychosomatic strain and job demand, the higher the symptom prevalence rate of cumulative trauma disorders. Moreover, the higher the score of type A behavior, the higher the symptom prevalence rate, and even those who changed the location of their practice for the last three months also showed high symptom prevalence rate. Conclusions : The results of multiple logistic regression analysis, which incorporated demographic, work-related and psychosocial characteristics as independent variables, showed that women were at a higher risk than men in developing cumulative trauma disorders; and that the higher the psychosomatic strain and more frequent type A behavior, the higher the risk of developing cumulative trauma disorders. The above results seem to suggest that not only continual, repeated fine and skillful musculoskeletal movements and lengthy hours in an uncomfortable position but also the psychological stress related to patient satisfaction, can lead to cumulative trauma disorders.