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수근관증후군의 수술방법에 따른 성적 - 내시경수술과 개방절개술 -
이한영,김일만,이장철,이창영,손은익,김동원,임만빈,Lee, Han Young,Kim, Il-Man,Lee, Jang Chull,Lee, Chang Young,Son, Eun Ik,Kim, Dong Won,Yim, Man Bin 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.11
Objective : The goal of this study is to present whether endoscopic release(ER) is superior to open release(OR) for the treatment of carpal tunnel syndrome(CTS). Method and Material : Fifty-nine wrists in 43 patients who had clnical signs and symptoms consistent with CTS, not responded to non-operative management, were entered into the study. Authors retrospectively compared 27 wrists treated with ER(February 1999-June 1999) with 32 wrists treated with OR(October 1997-March 1999). We performed conventional open surgery in 25 patients(mean age ; 46 years) and Brown's two-portal technique in 18 patients(mean age ; 53 years) under intravenous regional block or general anesthesia. Results : Sixteen patients had CTS on both hands and left hands were affected more frequently than right hand, 34 and 25 respectively. Successful and poor results of ER were similar to those of OR. For patients in OR group, mean duration of symptoms was 5 years(range 1 month-30 years), and postoperative outcome was good in 27(84.4%) of wrists and poor in 5(15.6%). For patients in ER group, mean duration of symptoms was 7 months (range 2 months-25 years), outcome was good in 23(85.2%) of wrists and poor in 4(14.8%). The average time for complete relief of pain was 1.3 weeks and 7.6 weeks, respectively for OR and ER groups. No complication was noted in either group. Conclusion : This preliminary analysis suggests that faster relief of pain was achieved when the endoscopic method was used, although there were no significant differences in their efficacies regarding the improvement of symptoms.
이한영,이장철,김일만,이창영,손은익,김동원,임만빈,Lee, Han Young,Lee, Jang Chull,Kim, Il-Man,Lee, Chang-Young,Ikm, Eun,Kim, Dong Won,Yim, Man Bin 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.9
Objective : The development of magnetic resonance neurography(MRN) has made it possible to produce highresolution images of peripheral nerves themselves, as well as associated intraneural and extraneural lesions. We evaluated the clinical application and utility of high-resolution MRN techniques for the diagnosis and treatment of a variety of peripheral nerve disorder(PND)s. Material and Method : MRN images were obtained using T1-weighted spin echo, T2-weighted fast spin echo with fat suppression, and short tau inversion recovery(STIR) fast spin-echo pulse sequences. Fifteen patients were studied, three with brachial plexus tumors, five with chronic entrapment syndromes, and seven with traumatic peripheral lesions. Ten patients underwent surgery. Results : In MRN with STIR sequences of axial and coronal imagings, signals of the peripheral nerves with various lesions were detected as fairly bright signals and were discerned from signals of the uninvolved nerves. Increased signal with proximal swelling and distal flattening of the median nerve were seen in all patients of carpal tunnel syndrome. Among the eight patients with brachial plexus injury or tumors, T2-weighted MRN showed increased signal intensity in involved roots in five, enhanced mass lesions in three, and traumatic pseudomeningocele in three. Other associated MRI findings were adjacent bony signal change, neuroma, root adhesion and denervated muscle atophy with signal change. Conclusion : MRN with high-resolution imaging can be useful in the preoperative evaluation and surgical planning in patients with peripheral nerve lesions.
광대역 이중편파 무선 중계기용 패치안테나 설계 및 제작
이한영,Lee, Han-Young 한국전자통신학회 2012 한국전자통신학회 논문지 Vol.7 No.6
본 논문에서는 주파수 1.525GHz~1.665GHz 넓은 대역에서 동작하는 이중편파 패치안테나를 설계 및 제작하였다. 넓은 대역폭 및 고 이득을 갖기 위해 GND기판으로 부터 Air층을 높게 적용하였으며, 광대역 축비 및 고 이득을 갖기 위해 기생패치를 적용하여 원하는 데이터를 얻을 수 있도록 하였다. 그 결과 안테나의 정재파비(VSWR)는 전 대역에서 1.9 이하를 나타내며, 반사손실 S11과 S22는 전 대역에서 -10dB이하로 시뮬레이션과 유사한 특성 결과를 얻었다. LHCP(Left Hand Circular Polarization) 및 RHCP(Right Hand Circular Polarization)의 격리 특성은 시뮬레이션 특성보다 더 개선되어 전 대역에서 -13dB이하로 만족한 결과를 얻었다. In this paper, a dual polarization patch antenna operates at the wide bandwidth of 1.525GHz~1.665GHz was designed and fabricated. To obtain the wide bandwidth and high gain, increased height of air floor from GND was applied, and to get wide band axial ratio and high gain, parasitic patch was applied. The simulation and measurement showed good agreements, the VSWR was less than 1.9 at the frequency bandwidth, the return loss was less than -10dB, and the LHCP(Left Hand Circular Polarization) and RHCP(Right Hand Circular Polarization) isolation was less than -13dB at the frequency bandwidth.
유동상열처리로에 의해 BORIDING처리한 철강재료의 미끄럼마모특성연구
이한영,배석천( Han Young Lee,Seok Choun Bae ) 한국열처리공학회 1996 熱處理工學會誌 Vol.9 No.4
Boriding is one of the chemical methods to achieve the case hardening of steel as well as nitriding or carburizing. The surface layer of the bonded steel shows higher hardness and exhibits better resistance to corrosion or fatigue than the nitrided or carburized steel. The great majority of previous studies were confined to mild steel or some alloy steel. To enlarge the application, ductile cast iron (DCI) as a material for bonding has been tried in this study. Thus, sliding wear test has conducted using a pin-on-disc machine to compare between borided DCI and mild steel in fluidized bed furnace. The results show that the wear resistance of borided DCI is improved. Especially it is more efficient in the case of occurence of the mechanical wear.
ATM 망에서 웨이브릿 변환을 이용한 계층부호화 영상 전송에 관한 연구
이한영,송재연,Lee, Han-Young,Song, Jae-Youn 대한전자공학회 1998 電子工學會論文誌-T Vol.t35 No.2
ATM 기술과 패킷망의 발전에 따라 음성, 데이터, 영상 전송의 필요성이 증가되고 있다. ATM에서는 데이타 손실을 최소화하기 위하여 셀로 불리우는 일정길이의 데이타로 나누어 진다. ATM에서는 송신시 부호를 고정하지 않고 버리기 때문에 영상신호 전송에서는 계층부호화 방법을 사용한다. 따라서 본 논문에서는 계층부호화 방법인 웨이브릿 변환을 이용한 부호화를 시뮬레이션 하였다. We need the packet transmission of voice, data and video according to the development of ATM technology and packet network. In ATM, packet is parted to the constant length data, we called cell, the method is needed to minimize data loss. Because over ATM, we discard error cell without correction in transmission. So, about video, there is layered coding method. We simulated the coding using wavelet transform, which is structurally layed coded, so need not the additional coder.
능동형 RFID시스템에서 태그 인식 속도 향상을 위한 고속 태그 충돌 방지 알고리즘
이한영,Lee, Han-Young 한국전자통신학회 2012 한국전자통신학회 논문지 Vol.7 No.2
현재 RFID 시스템에서 해결하여야 할 가장 큰 문제 중 하나는 태그간의 충돌로 인해 인식 효율이 떨어진다는 것이다. 기존의 충돌 방식 중 BS 충돌 방지 알고리즘 방식은 구현이 간단하다는 장점이 있으나, 태그 수가 많아짐에 따라서 태그간 충돌에 의해 전체 태그를 읽는데 요구되는 단계별 스케줄 횟수가 증가하는 단점을 가지고 있다. 본 논문에서는 이 문제를 해결하기 위해서 충돌 예상을 최소화 하기 위해 사전에 '0'과 '1'의 결정 비트를 통해 복수의 응답 프레임(MF)을 제안한 방식을 제안하였다. 시뮬레이션 결과 복수 응답 프레임 (MF) 알고리즘은 기존의 알고리즘보다 30~50% 성능이 향상됨을 보인다는 것을 알 수 있었다. In RFID System, one of the problem that we must slove is to devise a good anti-collision algorithms to improve the efficiency of tag identification which is usually low because of tag collision. Among of the existing RFID anti-collision algorithm, BS (Binary Search) algorithm, though simple, has a disadvantage that the stage of times used to identify the tags increase exponentially as the number of tags does. In this paper, I propose a new anti-collision algorithm called Multi-collision reflected frame which restricts the number of stages and decided bit. Since the proposal algorithm keep the length size of UID and density of total tag when have 100%. The simulation results showed that the proposed algorithm improves the efficiency by 30~50% compared to the existing algorithm.
이한영 ( Han Young Lee ) 한국복음주의신학회 2011 성경과신학 Vol.57 No.-
본 논문은 고대이스라엘의 인종적 관계와 관련해 구약에서 묘사되고 있는 복합적인 배타성과 관용성의 많은 논쟁과 질문에 있어 에스라-느헤미야서에서 명백히 드러나는 배타성 문제를 텍스트의 면밀한 읽기를 통해 재고하고 있다. 에스라-느헤미야는 첫째, 이스라엘 백성의 개념을 사마리아를 배제한 유다와 베냐민으로 제한한다. 둘째, 유다의 정통성을 바빌론-바사-디아스포라 귀환자들에게만 부여한다. 셋째, 유다의 머문 자들을 포함하여 이방원주민들과의 협동이나 통혼을 금지하고 또한 파괴함으로써 그들을 귀환한 이스라엘 공동체로부터 철저히 절교시킨다. 이에 본 논문은 (I) 에스라-느헤미야서의 내러티브 플롯과 (II) 에스라-느헤미야서에서 묘사되고 있는 배타성의 신학적 모티프의 분석을 통해 에스라-느헤미야서의 배타성을 단순히 상황윤리나 공리주의 혹은 정언명령법으로 이해하려는 오류를 반박한다. 그리고 에스라-느헤미야서의 배타성은 신학적 규범적이기보다는 상황적 서술이었음을 주장한다. 그러나 분명한 것은 포로후기 언약공동체가 그들의 신앙의 순수성과 구별된 삶을 실현하기 위해 실제로 그 얼마나 극적인 희생을 자처하고 고투하였는지를 가볍게 넘겨서는 안 될 것을 말한다. 온전한 개혁이 아니었을지라도, 포로후기 유다 언약공동체의 배타성은 다원주의 사회에 너무나도 편하게 혼합되어 살아가고 있는 오늘날의 그리스도인들로 하여금 과연 그 정체성과 구별된 삶의 실체는 무엇인지를 한층 더 심중히 고민케 한다. The present paper attempts to review through a close reading of the texts an almost indisputable problem of exclusiveness clearly shown in the book of Ezra-Nehemiah viz many discussions and questions on the complex concept of exclusiveness and inclusiveness in the ancient israelite ethnic relations portrayed across the Old Testament. First, in Ezra-Nehemiah, the identity of the people of Israel is limited to Judah and Benjamin excluding Samaritans. Second, The legitimacy of Judah is assigned only to the returnees from babylonian and persian diaspora. Third, By prohibiting any cooperation and even undoing the intermarriage between pagan natives including those who have remained in the land, they are thoroughly separated from the Israelite community composed by the returnees. However the present paper, by an analysis of (I) narrative plot and (II) theological motif behind the Ezra-Nehemian exclusiveness, refutes the fallacy of understanding such an intolerance only in terms of situational, utilitarian, or categorical ethics. As a result, one may argue that the exclusiveness in the book of Ezra- Nehemiah was not a theological prescription but a situational description. Nevertheless, these texts show how extreme sacrifices and struggles were invested by the post-exilic covenantal people in pursuit of pure faith and holy life. Though it may have not been a perfect reformation movement, the efforts shown by the exclusiveness of the post-exilic Judean community elicits trouble to the question of what comes to be the identity of present Christians who so comfortably settles within the religious pluralistic society.
WC위 TiAlN 코팅층에 미치는 Sand Blasting 처리의 영향
이한영(Han-Young Lee) 한국트라이볼로지학회 2021 한국트라이볼로지학회지 (Tribol. Lubr.) Vol.37 No.2
The effect of the sand blasting before TiAlN coating in the manufacture of WC hard metal alloy tips have been studied. For four different tips, according to the status of processing of the sand blasting and the coating, residual stress measurement by X-ray diffraction and several tests for mechanical properties have been conducted. The results suggest that there was no difference in static mechanical properties, such as hardness, surface roughness and elastic modulus, between two coatings. Furthermore, compressive residual stress was generated equally on their surfaces. Additionally, the compressive residual stress in substrate WC was found to increase greatly when subjected to sand blasting treatment. However, the compressive residual stress decrease after coating regardless of sand blasting treatment. Nevertheless, it is confirmed that the compressive residual stress generated in the coating after sand blasting is less than that in the non-sandblasting coating. This was attributed to the plastic deformation occurring in the WC substrate during coating after sand blasting. In contrast to the scratch test results, sand blasting was assumed to have a negative effect on the adhesion between the coating and substrate. This is because there is a high possibility of microcracks due to plastic deformation in the WC substrate under the coating after sand blasting.