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Delaire 변법을 이용한 편측 불완전 구순열 환자의 기능적 일차 봉합술: 증례보고
이병하,박창주,황경균,심광섭,정필훈,서병무,Lee, Byung-Ha,Park, Chang-Joo,Hwang, Kyung-Gyun,Shim, Kwang-Sup,Choung, Pill-Hoon,Seo, Byoung-Moo 대한구순구개열학회 2008 대한구순구개열학회지 Vol.11 No.2
The outcome of primary surgery for cleft lip is judged by its effects on the quality of oro-facial function and development. Many surgical techniques have been tried to obtain better results, however, Delaire introduced a technique of functional closure of the lip and nose, based on the findings of no true hypoplasia in the tissues either side of the cleft. In a seven-month-old Asian male patient with unilateral incomplete cleft lip, we carried out the primary closure by modified Delaire's technique. With no alveolar bone graft, the vertical incision on the nasal base was omitted in this patient because of his acceptable symmetry of nose. Also, a small Z plasty was added on the non-cleft side. The V-shaped incisions, whose notch was located on each side of the red vermilion, were designed and beveled incisions were performed for the rehabilitation of lip length and thickness, considering the postoperative wound contracture. We assured that this modification of Delaire's technique could be applied for various cases of primary closure of incomplete cleft lip.
치과 국소마취와 관련된 하치조신경과 설신경 손상에 대한 연구
이병하,임태윤,황경균,서민석,박창주,Lee, Byung-Ha,Im, Tae-Yun,Hwang, Kyung-Gyun,Seo, Min-Seock,Park, Chang-Joo 대한치과마취과학회 2010 Journal of Dental Anesthesia and Pain Medicine Vol.10 No.2
Background: Damages of trigeminal nerve, particularly inferior alveolar nerve and lingual nerve, could occur following dental procedures. In some cases, nerve damage may happen as a complication of the local anesthetic injection itself and not of the surgical procedure. Methods: From September 2006 to August 2010, 5 cases of inferior alveolar nerve and lingual nerve damages, which were assumed to happen solely due to local anesthesia, were reviewed. All cases were referred to Division of Oral and Maxillofacial Surgery, Department of Dentistry, Hanyang University Medical Center for legal authentication in the process of criminal procedure. Results: In all five cases, patients complained of altered sensation occurred in the distribution of the inferior alveolar or lingual nerve following block anesthesia. The local anesthetics were 2% lidocaine with 1 : 100,000 epinephrine and the amount of local anesthetics, which were used during injection, were varied. Most of patients experienced the electric stimulation during injection. Recovery was poor and professional supportive care was mostly absent. Conclusions: Dental practitioners should consider that the surgical procedure caused the trigeminal nerve damage, however, dental local anesthesia for inferior alveolar nerve and lingual nerve could be one of the causes for damages. The various mechanisms for nerve damages by local anesthesia are thoroughly discussed.
이병하(Byung Ha Lee),김진성(Jin Sung Kim),김성호(Sung Ho Kim),양경승(Kyung Seoung Yang),이영현(Young Hyun Lee),김종수(Jong Su Kim),김영배(Young Bae Kim),류홍제(Hong Je Ryoo),진윤식(Yun Sik Jin) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This paper describes a 150 kJ compact pulsed power supply (CPPS) for electrothermal chemical (ETC) accelerator. The requirement of the CPPS are as follows: the maximum power of 250 ㎿, the pulse width of about 1 ㎳, the volume of no more than 0.5 ㎥, the efficiency of energy transfer over 80 %, the repetition rate of 4∼5 times per minute. The CPPS is composed of four 37.5 kJ capacitor bank modules in parallel to make a trapzoid pulse shape and satisfy the above requirements. Each module is designed and fabricated to achieve a high reliability, safety, efficiency and density considering several expected conditions of worst operation. The performance test results on the CPPS in the conditions of several operation including the 120 ㎜ ETC accelerator are presented.
디젤발전기의 출력비에 따른 효율을 고려한 마이크로그리드에서의 BESS와 디젤발전기의 최적 운영 기법에 관한 연구
이병하(Byung Ha Lee) 대한전기학회 2016 전기학회논문지 Vol.65 No.4
With the growing interest of microgrid systems all over the world, many studies on microgrid operation are being carried out. The battery energy storage system(BESS) and the diesel generator are key equipments in the microgrid. In this paper, we analyze the characteristics of fuel consumption according to the power ratio of the diesel generator. Then, the formula to represent the unit cost of generation according to the power ratio of the diesel generator is derived. A new modeling of battery operation is presented considering the lifetime reduction according to increasing the cycles of charge/discharge operation of the battery. The methodology of determining the optimal operation of the battery and the diesel generator is presented by the use of the formula of fuel consumption of the diesel generator and the new modeling of battery operation. It is shown that this optimization methodology can be applied effectively for economical operation of the BESS and the diesel generator of a microgrid by case studies.
선로유효전력 Tracing과 민감도를 활용한 선로 과부하 해소 스위칭 및 모선분리 알고리즘에 관한 연구
이병하(Byung Ha Lee),황승호(Sung-Ho Hwang) 대한전기학회 2011 전기학회논문지 Vol.60 No.11
In this paper, a new algorithm for alleviating overloads in power networks by the use of line power tracing and sensitivity is proposed to perform line switching and bus separation effectively. Also, a new bus separation index based on line power tracing is presented to find the bus to be separated for relieving overloads effectively. By applying the sensitivity of the line flow with respect to the change of the line impedance, both switching-on and switching-off of the lines for alleviating overloads in power networks are performed systematically at once. The number of the considered cases for line switching and bus separation can be greatly reduced and the best combination of line switching and bus separation can be acquired efficiently by the use of the sensitivity and the bus separation index. In order to show the effects of this algorithm, it is applied to a small scale power system of IEEE 39-bus system and practical power systems of KEPCO.
주요 전기기기의 효율향상에 따른 기후변화 기여도 비교분석에 관한 연구
이병하(Byung-Ha Lee),원종률(Jong-Ryul Won),김정훈(Jung-Hoon Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.11
에너지 효율관리제도(최저효율기준, 라벨링 제도 등)는 에너지 사용의 증대와 산업의 발달에 따른 다양한 기기들의 개발에 따라 에너지기기들의 수요가 늘어나고 있는 현실에서 기기의 수요는 감소시키지 않으면서도 에너지를 감소시킬 수 있는 가장 효과적이고 경제적인 수단으로 평가받고 있다. 이는 이산화탄소를 비롯한 온실가스의 방출을 제한하여 지구온난화를 방지하고자 하는 기후변화협약을 이행하는 데에 있어 중요한 도구가 되고 있다. 본 논문은 이러한 고효율기기의 효율향상에 따른 기후변화협약에 대한 기여도 산정을 위해, 효율향상 시에 이산화탄소 절감량을 구하는 방안을 제시하고 주요 전기기기에 대해 사례연구를 비교분석하였다.