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초음파를 이용한 국소마취하 표재비골신경 포착증후군의 치료
이경찬,곽지훈,황철호,박홍기,Lee, Kyung-Chan,Kwak, Ji-Hoon,Hwang, Chul-Ho,Park, Hong-Gi 대한족부족관절학회 2013 대한족부족관절학회지 Vol.17 No.3
Purpose: To review the outcomes of surgical treatment for superficial peroneal nerve entrapment. Materials and Methods: Ultrasonogram was used for diagnosis and surgical treatment. Seven superficial peroneal nerve entrapment were surgically treated with follow up of average 16 months (range, 6~29 months). Three patients were male and four patients were female with mean age 36.7 years (range, 19~51 years). Four cases developed after repetitive ankle sprain and three cases had no etiology. Results: Operation was performed mini-open and subcutaneous fasciotomy under local anesthesia. The results were excellent in two cases, good in four cases, fair in one case. Conclusion: Ultrasonogram was useful for diagnosis and surgical treatment of superficial peroneal nerve entrapment syndrome.
신영석,김성태,김헌주,김재영,황철호,Shin, Young-Sug,Kim, Seong-Tae,Kim, Heon-Ju,Kim, Jae-Young,Hwang, Chul-Ho 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.5
The prediction method of future events using the time histories of velocity or pressure, etc., is a useful way for controlling various air vehicles. For example, the sensors of velocity or pressure can be used to extract the time mode coefficients of eigenmode of flow field, and then the result is applied to suppress wake or drag. The velocity information is mapped to the entire flow field, so this mapping function can be used to predict the future events based on the current information. The mapping function is composed of the huge amount of weight parameters, so the efficient way of finding these parameters is needed. Here, the neural network algorithm is studied to draw a mapping function using the number and location of velocity sensors.
전방 십자 인대 파열과 슬관절 내반 변형 동반시 근위 경골 절골술과 전방 십자 인대 재건술의 동반 치료와 전방 십자 인대 재건술의 단독 치료의 비교
곽지훈,심재앙,이용석,황철호,이범구,Kwak, Ji Hoon,Sim, Jae Ang,Lee, Yong Seuk,Hwang, Chul Ho,Lee, Beom Koo 대한관절경학회 2013 대한관절경학회지 Vol.17 No.1
목적: 전방십자인대 파열과 슬관절 내반 변형 동반시 근위 경골 절골술과 전방십자인대 재건술의 동시 치료와 전방십자인대 재건술의 단독 치료의 결과를 비교하고자 한다. 대상 및 방법: 2005년 3월부터 2007년 2월까지 시행한 근위 경골 절골술과 전방십자인대 재건술을 동시 시행한 8예와 전방십자인대 재건술만을 단독 시행한 13예를 비교하였다. 평균 나이는 각각 34.1세(범위: 20-53), 34.9세(범위: 21-50)였으며, 평균 추시 기간은 각각 22.6개월(범위: 12-35), 20개월(범위: 13-33)이었고 임상적, 방사선학적 평가를 시행하였다. 결과: 양 군간 International Knee Documentation Committee (IKDC) 점수, Lysholm 점수, Lachman 검사, pivot shift 검사, KT-2000 관절계 검사, $30^{\circ}$, $90^{\circ}$ 전방 전위 긴장 방사선 검사 등에서 임상적, 방사선학적 유의한 차이를 보이진 않았으나, Tegner 운동 점수, Cincinnati 운동 점수는 각각 근위 경골 절골술을 동반 치료한 군이 각각 4.9점, 57.9점이었고, 단독 치료한 군이 각각 5.6점, 72.9점으로 근위 경골 절골술과 전방십자인대 재건술을 동반 치료한 군이 유의하게 낮았다(p<0.05). 결론: 전방십자인대 파열과 슬관절 내반 변형 동반시 근위 경골 절골술과 전방십자인대 재건술의 동반 치료는 전방십자 인대 재건술의 단독 치료에 비해 일상 생활에서는 차이가 없었으나 운동 능력에 있어서는 제한을 줄 수 있다고 사료된다. Purpose: To compare of the results between anterior cruciate ligament (ACL) reconstruction alone and combined with high tibial osteotomy for ACL ruptured knees with varus alignment. Materials and Methods: We retrospectively reviewed 8 cases of ACL reconstruction combined with high tibial osteotomy (Group I) and 13 cases of ACL reconstruction alone (Group II) for varus angulated ACL ruptured knees (from March 2005 to February 2007). Mean age were 34.1 years (range: 20-53) in Group I, 34.9 years (range: 21-50) in Group II. Average follow up period were 22.6 months (range: 12-35) in Group I, 20 months (range: 13-33) in Group II. We analyzed clinical and radiological results. Results: There were no significant differences in clinical and radiologic results between two groups for IKDC scores, Lysholm knee scores, Lachman test, pivot shift test, KT-2000 arthrometer, $30^{\circ}$ and $90^{\circ}$ anterior drawer stress radiographs. Tegner activity scales and Cincinnati knee ligament rating scales were 4.9, 57.9 in Group I, and 5.6, 72.9 in Group II. Group I was statistically lower than Group II for Tegner activity scales and Cincinnati knee ligament rating scales (p<0.05). Conclusion: There were no significant differences in daily living between ACL reconstruction alone and combined with high tibial ostetomy for varus angulated ACL ruptured knees. However, ACL reconstruction combined with high tibial osteotomy could limit sport activity ability.
투명방음판의 품질기준 설정에 관한 연구(1) - 기계적 특성 및 안전성 평가
장태순(Chang, Tae-Sun),김철환(Kim, Chul-Hwan),황철호(Hwang, Cheol-Ho) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.12
A variety of materials may be used for soundproof panels. The major advantage of transparent material over traditional materials in noise barriers is aesthetics. The transparent panel materials such as clear plastic or glass are an ideal way of reducing or virtually eliminating the visual impact of a noise barrier. With the use of transparent materials, the drivers' view of the roadside and the sunlight penetration to the highway would not be blocked. Korean Industrial Standards for soundproof panels have been established. But, transparent soundproof panels are not included in this standards. And, some specifications provide only a few basic characteristics for transparent soundproof panels. To develop guidelines on quality criteria for transparent soundproof panel, their mechanical properties such as wind load resistance, safety under impact, and abrasion resistance were experimentally investigated.