UAV 총론 - 군사적 목적으로의 UAV 활용(현재와 미래)

이경태,이기학,Lee, Gyeong-Tae,Lee, Gi-Hak 한국항공우주산업진흥협회 2001 航空宇宙 Vol.76 No.-

본고는 세종대학교 기계항공우주공학부 교수이자 세종-록히드마틴 우주항공연구소 소장인 이경태 교수와 동 대학 항공우주공학과 이기학 대학원생이 UAV 총론 및 국내 UAV연구개발 방향을 내용으로 함께 발표한 논문으로 이번회는 마지막회로 민수분야 UAV 시장의 잠재성, UAV 제작회사 현황. UAV 시장확대를 위한 과제 등의 내용을 중심으로 소개한다

인체의 신비와 건강II-발

이경태,이우천,Lee, Gyeong-Tae,Lee, U-Cheon 한국건강관리협회 2007 건강소식 Vol.31 No.2

우리 인간의 신체는 약 206개의 뼈로 구성되어 있다. 그 중 양 발은 52개의 뼈, 38개의 근육, 214개의 인대로 형성되어 있는데, 얼마나 발이 인체에 있어서 중요한 지를 직접 느낄 수 있게 해주는 대목이다. 또한 발에는 모세혈관과 자율신경이 다른 어느 부위보다 집중적으로 분포되어 있어 발을‘제 2의 심장이다’라고 말하기도 한다. 발은 손 다음으로 많이 사용하는 부위이며 손에 비하여 육중한 무게를 지탱하는 구조로 인하여 많은 에너지를 필요로 한다. 그러므로 발끝까지 산소와 양분을 공급하는 혈관의 혈액이 원활하게 흐를 수 있게 하는 것은 건강에 있어 매우 중요한 요소이다 인체의 신비를 보여주는 우리 몸의 기관 그 두 번째, 발에 대해서 을지의대 을지병원 족부정형외과 이경태 교수, 인제대학교 서울백병원 족부클리닉 이우천 교수의 도움말로 알아본다.

중등도 이상의 무지 외반증에서 시행한 중족골 근위 갈매기 절골술의 평균 8년 추시

이경태,최재혁,양기원,이영구,김진수,박정민,Lee, Kyung-Tai,Choi, Jae-Hyuck,Young, Ki-Won,Lee, Young-Koo,Kim, Jin-Su,Park, Jung-Min 대한족부족관절학회 2007 대한족부족관절학회지 Vol.11 No.2

Purpose: The purpose of the present study is to evaluate the proximal metatarsal chevron osteotomy outcomes for moderate to severe hallux valgus more than seven year follow up. Materials and Methods: Between 1996 and 1998, hallux valgus 61 cases were evaluated. The follow up period was more than seven years. The clinical review analyzed by the hallux metatarsophalangeal-interphalangeal scale of the American Orthopedic Foot and Ankle Society, radiologic review by the hallux valgus angle, first and second intermetatarsal angle. Complication also evaluated. Results: Clinically, preoperative AOFAS score was average 43 points (range; $16{\sim}60$ points) which significantly improved to 88 points (range; $61{\sim}100$ points) at last follow up periods. Radiologically, the mean preoperative, postoperative, last follow up hallux valgus angle was $34^{\circ}$, $5.2^{\circ}$, $10.9^{\circ}$. The mean preoperative, postoperative, last follow up intermetatarsal angle was $15.3^{\circ}$, $3.3^{\circ}$, $5.3^{\circ}$. Postoperative angle change were no statistical significance (p>0.05). Complication were hallux varus 6 cases, metatarsophalangeal joint arthritis 2 cases, recurrence 1 case. Conclusion: Proximal metatarsal chevron osteotomy shows satisfactory outcome for moderate to severe hallux valgus more than seven year follow up.

의도적 이중 눈 깜빡임을 이용한 명령 실행시의 기준에 관한 연구

이경태,반영환,장필식,박경수,Lee, Gyeong-Tae,Ban, Yeong-Hwan,Jang, Pil-Sik,Park, Gyeong-Su 대한인간공학회 1999 大韓人間工學會誌 Vol.18 No.3

Several studies of eye-slaved nonverbal communicators have been performed recently. By integrating the eye and head-position monitoring devices, the present authors had developed an eye-controlled human/computer interface based on the line-of-sight and an intentional blink to invoke commands in the preceeding study. As a successive study, this paper examines the characteristics of performing the intentional double blinks experimentally and proposes the double blinks as an alternative triggering method. The applications may extend to several domains such as rehabilitation and virtual reality system with head mounted display.

류마토이드 관절염 전족부 변형의 재건술 후 중장기 추시 결과

이경태,최재혁,양기원,김진수,이영구,정충민,Lee, Kyung-Tai,Choi, Jae-Hyuck,Young, Ki-Won,Kim, Jin-Su,Lee, Young-Koo,Jung, Chung-Min 대한족부족관절학회 2007 대한족부족관절학회지 Vol.11 No.2

Purpose: We assess the mid to long term follow up results of arthrodesis of the first metatarso-phalangeal (MTP) joint and resection arthroplasty of the lesser toes in rheumatoid arthritic forefoot deformity. Materials and Methods: Between 1998 to 2001 year, 25 cases (18 patients) rheumatoid forefoot deformities were surgically corrected. Follow up period was 83 months (range, 63 to 90 months). The clinical outcome was evaluated using subjective satisfaction and AOFAS score. The radiological measurements were hallux valgus angle, first and second intermetatarsal angle, second metatarso-phalangeal angle (MTP-$2^{nd}$ angle). Results: Subjective satisfaction was 76%. AOFAS score improved from 37 to 73. The hallux valgus angle improved from preoperative $39^{\circ}$ ($27{\sim}64^{\circ}$) to $14^{\circ}$ ($4{\sim}34$) at the last follow up. The intermetatarsal angle were preoperative $13^{\circ}$ ($6{\sim}22^{\circ}$) to $11^{\circ}$ ($3{\sim}13^{\circ}$) at the last follow up, The MTP-$2^{nd}$ angle were preoperative $24^{\circ}$ ($9{\sim}47$) to last follow up $15^{\circ}$ ($2{\sim}39^{\circ}$) respectively (p>0.05). Complication was intractable callus 10 cases, Interphalangeal arthritis 5 cases. Conclusion: Mid to long term outcomes rheumatoid forefoot reconstruction by first MTP arthrodesis and resection arthroplasty of lesser toes results a satisfaction and pain relief.

축구 선수에서의 발목 및 발의 통증

이경태,양기원,김재영,차승도,김응수,Lee Kyung-Tai,Young Ki-Won,Kim Jae-Young,Cha Seung-Do,Kim Eung-Soo 대한정형외과스포츠의학회 2004 대한정형외과스포츠의학회지 Vol.3 No.1

The purpose of this study is to describe the common injuries in soccer players in terms of the orthopaedic operative treatment. We classified foot pain to in forefoot , midfoot, plantar aspect and mentioned the cause, incidence and treatment methods. Ankle pain was classified to anterior, lateral, medial and posterir aspect of the ankle. In all injuries in soccer players, conservative treatment is primary treatment method and we treated operatively in no respond case inspite of the physical therapy and rehabilitation program for sufficient period. The anatomical repair was preferred and minimal invasive surgery was recommended if possible and then focus of treatment is to early return to previous full activities through the rehabilitation program for sufficient period. As a conclusion, it is necessory to understand the mechanism and cause of the common injuries in soccer players and to select the proper treatment method to the degree of the injuries.

청소년기에 발생한 주상골 피로 골절의 수술적 처치

이경태,김기천,양기원,조창호,Lee, Kyung Tai,Kim, Ki Chun,Young, Ki Won,Cho, Chang Ho 대한족부족관절학회 2016 대한족부족관절학회지 Vol.20 No.4

Purpose: The aim of this study is to evaluate the effectiveness of surgical treatment in adolescent patients suffering from navicular stress fracture. Materials and Methods: A total of 11 adolescent patients aged 14 to 19, who underwent an operation for navicular stress fracture between 2005 and 2008 were recruited. Clinical outcomes were evaluated by the American Orthopaedic Foot and Ankle Society (AOFAS) midfoot score and visual analogue scale (VAS) score. Results: The mean VAS score before the operation was 7.7. A score of 2.9 was confirmed at final follow up after the operation. The mean final follow-up period was 22.1 months. There was a statistically significant improvement in the VAS score between before and after the operation (p=0.01), and similarly, the AOFAS score also showed an improvement, from 46.5 to 80.7 (p=0.01). The pain that remained after the operation, according to the VAS score, was severe in three patients (27.3%), tolerable in seven patients (63.6%), and free of pain in one patient (9.1%). Conclusion: In navicular stress fracture in adolescents, careful selection of patients who could benefit from surgical treatment is recommended.

실패한 만성 족근관절 외측 재건술에서의 변형 Brostrom 술식의 결과

이경태,양기원,김재영,김응수,차승도,박신이,Lee, Kyung-Tai,Young, Ki-Won,Kim, J-Young,Kim, Eung-Soo,Cha, Seung-Do,Park, Shin-Yi 대한족부족관절학회 2004 대한족부족관절학회지 Vol.8 No.2

Purpose: We assessed the clinical results of modified Brostrom procedure as a revision method after failure of a primary reconstruction. Materials and Methods: This is a retrospective study of seven patients treated with Modified Brostrom procedure after failed lateral ankle ligament reconstruction between 1996 and 2002. Instability symptom developed average 4.7 month after the initial reconstruction surgery at other clinics. All patients had significant functional impairment before surgery and not responded to conservative protocols. Modified Brostrom procedure was applied to all patients. Results: The average follow up was 51 months (18 to 84). Seven of eight patients had clinical stability following revision reconstruction, six patients (75%) returned to their previous functional level. American Orthopaedic Foot and Ankle Society ankle-hindfoot scores averaged 87.5. There is no difference in active or passive range of motion of plantar flexion or dorsiflexion when compared to the contralateral ankle. However, three patients were noted to have lost some degree of inversion when compated to contralateral ankle. Two patients had osteochondral lesion and multiple spurs and had pain around the ankle that prevented their full recovery. One patient complained of persistent pain which was considered complex regional pain syndrome. Conclusion: Though the outcome of the Modified Brostrom procedure as a method of revision surgery was less satisfactory compared to the results of primary ankle reconstruction, it would be an appropriate option when concomitant abnormalities were not accompanying.

시장경쟁원리 도입에 대비한 원가관리 개선방안 (2)

이경태,Lee, Gyeong-Tae 한국방위산업진흥회 2000 國防과 技術 Vol.- No.258

전략적 원가관리가 지향하는 바는 원가관리를 통해서 경쟁우위를 확보해 나가는 것을 의미하는데 단순히 원가만을 절감하는 것을 의미하지는 않고 무한경쟁, 대량고객화의 시대에서 품질 수준을 확보하면서 가격경쟁력을 갖추게 하는 것이 원가관리의 진정한 목표라 할 수 있다. 그러나 최근까지도 민수산업, 방산업체 가릴 것 없이 우리 나라 기업에서는 체계적인 원가관리의 노력이 부족한 실정이고 아직도 초보적인 단계에 머물고 있다고 할 수 있다. 최근 방위산업 분야의 변화된 환경하에서 시장경쟁체제로 전환된다고 할 때 각 기업이 전략적으로 원가관리를 하지 못한다면 경쟁력 상실 가능성이 높다.

무지 외반증 환자에서 변형 Lapidus 술식을 이용한 치료

이경태,양기원,김재영,이세영,Lee, Kyung-Tai,Young, Ki-Won,Kim, J-Young,Lee, Se-Young 대한족부족관절학회 2003 대한족부족관절학회지 Vol.7 No.2

Purpose: The purpose of this study was to evaluate the result of modified Lapidusprocedure for Hallux valgus associated with first ray hypermobility Materials and Methods: A retrospective study was conducted between Aug. 1999 and Oct. 2003. We evaluated 20 cases (12patients)of hallux valgus that performed modified Lapidus procedure. We asked to patient about postoperative satisfaction in terms of overall, pain, and appearance. preoperative and postoperative AOFAS score for the forefoot was calculated, also preoperative and postoperative radiologic evaluation was done. Results: In terms of satifaction, overall rate was 70%, pain relief and appearance were 70% and 70%. preoperative mean Hallux valgus angle and mean intermetatarsal angle were 42.6degree and 19.4degree. after procedure, at last follow up, mean hallux valgus angle and mean intermetatarsal angle were 16degree and 8.7degree. In terms of complication, nonunion was seen in 3 cases and recurrence of hallux valgus deformity was 2 cases. Conclusion: In consideration of high complication rate, modified Lapidus prociduremust be improved in terms of more rigid fixation technique, etc.