최씨 훅을 이용한 복강경 버찌씨 수술

김영혜 ( Young Hye Kim ),박준선 ( Jun Seon Park ),최상준 ( Sang Joon Choi ),송창훈 ( Chang Hoon Song ),한세준 ( Sei Jun Han ),정혁 ( Hyuk Jung ) 대한산부인과학회 2006 Obstetrics & Gynecology Science Vol.49 No.6

목적: 버찌씨 수술은 복압성 요실금 수술에 효과적인 수술로 여겨져 왔다. 요실금의 원인이 내인성 요도 괄약근의 결손소견 없이 요도의 과운동성으로 인한 경우 버찌씨 수술이 일반적으로 추천되어진다. 본 연구에서는 복강경 버찌씨 수술에서 최씨 훅의 유용성에 대해 알아보고자 하였다. 연구방법: 2000년 10월부터 2005년 3월까지 본원에서 복강경 버찌씨 수술을 시행받은 47명의 환자를 대상으로 하였다. 27명은 고전적 복강경 버찌씨 수술을 시행하였고 20명은 내골반 근막을 Cooper 인대를 부착하는데 유용한 본원에서 고안한 최씨 훅을 이용하여 복강경 버찌씨 수술을 시행하였다. 결과: 고전적 복강경 버찌씨 수술을 시행한 군과 최씨 훅을 이용한 복강경 버찌씨 수술을 시행한 군의 평균 나이, 분만력, 폐경률, BMI는 두 군간에 통계학적으로 유의한 차이를 보이지 않았다 (p>0.05). 수술 시간은 고전적 복강경 버찌씨 수술은 90.52±15.32분, 최씨 훅을 이용한 복강경 버찌씨 수술은 38.50±10.14분으로 최씨 훅을 이용한 경우 수술시간이 통계적으로 유의하게 짧았다 (p<0.05). 두 군간에 재발률 및 합병증 발생은 통계적 유의성을 보이지 않았다 (p>0.05). 결론: 본 연구에서 본원에서 고안한 최씨 훅을 이용하여 복강경 버찌씨 수술을 시행한 결과 수술 시간을 단축시킬 수 있었으며 수술 효과는 기존 방법과 동일하게 관찰되었다. 이에 최씨 훅은 복강경 버찌씨 수술에서 사용할 때 집도자의 봉합 과정을 단순화시켜 수술 시간을 단축시키므로 복강경 버찌씨 수술에 용이한 기구이다. Objective: Burch operation has been effective method for the treatment of stress incontinence. Burch operation is a well-accepted procedure for treating stress urinary incontinence secondary to urethral hypermobility without intrinsic sphincter deficiency and is the reference standard with which other procedures are compared. This study is to evaluate the effectiveness of the Choi`s hook in laparoscopic Burch operation. Methods: This study included 47 patients who had undergone laparoscopic Burch operation from October 2000 through March 2005. Of these 47 patients, 27 patients underwent traditional laparoscopic Burch operation (Group 1) and 20 patients underwent laparoscopic Burch operation with Choi`s Hook on anchoring the endopelvic fascia to the Cooper`s ligament (Group 2). Results: The mean age of patients of Group 1 was 55.6±9.37 years of age and that of Group 2 was 56.0±5.93 years of age. There is no difference in the mean age of patients (P>0.05). The mean operating time was 90.5±15.32 minutes for Group 1 and 38.5±10.14 minute for Group 2. The mean operating time was shorter in Group 2 than Group 1 (P<0.05). There was no difference in recurrence rate and complication rate between Group 1 and Group 2 (P>0.05). Conclusion: We performed laparoscopic Burch operation with the Choi`s Hook on anchoring the endopelvic fascia to the Cooper`s ligament. When we compared traditional laparoscopic Burch operation with laparoscopic Burch operation with Choi`s Hook, we could shorten the operation time using the Choi`s Hook.

Acaricidal toxicities and synergistic activities of Salvia lavandulifolia oil constituents against Dermatophagoides farinae, D. pteronyssinus, and Tyrophagus putrescentiae

Seon?A Choi,Won-Seok Lee,Yun-Seon Yu,Myung-Ji Lee,Hoi-Seon Lee 한국농약과학회 2018 한국농약과학회 학술발표대회 논문집 Vol.2018 No.4

Influence of Gas Nitriding on the Damping Capacity of Fe‑17Mn Alloy

Seon‑Min Choi,Ji‑Sook Park,Kyongjun An,이영국 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.1

Fe-17Mn alloy has been attracted as a high damping alloy due to its excellent damping capacity and tensile properties. For itsindustrial application, it is necessary to improve both wear resistance and anti-oxidation. To solve this problem, gas nitridingwas performed at 520 °C for 10 h using cold-rolled specimens. The nitrided specimen revealed a thick nitride layer of~ 68 μm with ~ 20%Mn and a hardness value of ~ 650 Hv on the matrix of ε martensite and γ austenite without the diffusionlayer. The damping capacity of the nitrided specimen was decreased with increasing the thickness ratio of nitride layer tomatrix. However, when the thickness ratio was ≤ 1.5%, the damping capacity of the nitrided specimen was similar to that ofthe nitride-free specimen. This indicates that the wear resistance and anti-oxidation of Fe-17Mn alloy can be improved bya thin nitride layer without the loss of its damping capacity.

The diagnosis of coronoid impingement using computed tomography

Baik, Jee-Seon,Huh, Kyung-Hoe,Park, Kwan-Soo,Park, Moo-Soon,Heo, Min-Suk,Lee, Sam-Sun,,Choi, Soon-Chul 대한구강악안면방사선학회 2005 Imaging Science in Dentistry Vol.35 No.4

Coronoid impingement can cause limitation of mouth opening. In many cases, it appears to be related to the coronoid hyperplasia. We present a case of mouth opening limitation caused by coronoid impingement on the posterior surface of the zygomatic bone without coronoid hyperplasia. The bony changes in coronoid and zygoma including surface irregularity and discontinuity of the cortex and sclerotic change of inner medullary space were noted on computed tomography (CT) scans in different level of axial planes. Through another CT scans in open mouth position could demonstrate that those bony changes were caused by the contact of both surfaces against each other. In case coronoid impingement is suspected of the many possible causes, the open mouth CT scans will be needed to reveal the direct impingement of coronoid on zygoma even without coronoid hyperplasia.

NC선반 기어박스의 기어열 : 축계 진동해석 Spindle System for an NC Lathe Gear Box

최영휴,박선균,배병태,정택수,김청수 한국공작기계학회 2000 한국공작기계학회 추계학술대회논문집 Vol.2000 No.-

In this study, two mathematical models are first constructed to analyze vibration characteristics of a gear train - spindle system of an NC lathe gear box. One is a lumped parameter model which is used for calculating natural frequencies of the torsional vibration, the other is a finite element model for analyzing lateral vibration and critical speeds of the spindle system. In addition, this study examines some possible resonance conditions such as gear mesh frequencies, IX shaft rpm frequencies over whole operating speed range, and so on. The results may be helpful to design a machine tool gear box with low noise and vibration.

무선 인터넷 포털 사업의 경쟁우위 요인에 관한 소고

최선규 정보통신정책학회 2003 정보통신정책연구 Vol.10 No.3

인터넷서비스산업의 가치사슬에서 네트워크 부문을 담당하근 유선네트워크사업자들은 자신이 보유한 네트워크 시장부문에서의 경쟁우위를 플랫폼 부문인 유선인터넷포털로 이식시키는 데 실패하고 이른바 '멍청한 파이프라인'으로 전락하고 말았다. 이 논문은 무선과 데이터통신수요의 비중 증가로 향후 주요 산업으로 성장할 것으로 예상되는 무선인터넷 포털사업에서 경쟁우위를 확보하기 위만 원천이 무엇인지 연구한다. 유선인터넷 포털사업에서는 초기에는 브랜드 효과에 의한 선점자 이득이 우세했으나, 사업의 불확실성이 매소죄면서 우수만 서비스의 확보, 규모의 경제 여부가 주요한 경쟁우위 원천으로 부각되고 있다 그러나, 무선인터넷은 네트워크 용량, 요금, 단말기 스크린 및 컴퓨팅 파워의 차이 때문에 유선인터넷과는 확연히 다른 서비스로 발전된 것으로 선망되며, 즉시성, 위치성, 개인성이 강한 서비스가 주요한 서비스(killer applications)로 등장할 것이다 따라서 무선인터넷 포털 사업에서 성공하기 위한 맥심역량도 유선인터넷의 그것과는 사문 다를 것으로 보인다. 무선포털에서는 무선망 개방 등의 법적 규제, 개인의 위치정보 등 원재료에 대한 우일한 접근권, 규모의 경제가 경쟁우위를 확보할 수 있는 주요 원천이 될 것으로 보인다. 무선 네트워크를 보유한 포털 사업자는 순수한 포털사업자에 비해 제반 요인에서 현재 우위를 점하고 있으나 무선망 개방, 가상이동망사업자(MVNO) 진입 등 규제완화에 따라 그 경쟁우위는 희석될 것이다. Fixed line Internet access providers, having failed to leverage their competitive advantage in network businesses into the Internet portal businesses, become 'dumb pipe lines'. This paper studies the sources of competitive advantage in the newly emerging mobile Internet portal market. In the fixed Internet portal business, it is widely accepted that early mover advantage is fading away and that the factors such as search engine quality, economies of scale are getting much more important. The mobile Internet services are fundamentally different from the fixed Internet services in the aspects of network speed, size of terminal screen, computing power of terminal and price of network usage. These differences imply that the successful mobile Internet portal will require new source of competitive advantage. Therefore, successful fixed portals will not become automatically successful in the mobile portal business. I suggest that two factors are very important in attaining competitive advantage in the mobile Internet portal; 'superior access to essential inputs' such as subscriber location information and 'economies of scale'. Mobile portal which own mobile network have competitive advantage over pure mobile portals which do not own mobile networks, since they have superior access to subscriber location information and a large base of network subscribers. Competitive advantage of mobile network portals, however, is expected to be neutralized with the advance of governments' regulatory policy such as MVNOs (mobile virtual network operators), and ONP (open network policy)imposed on the mobile Internet.

「獻花歌」에 대한 祭儀的 考察

최선경 연세대학교 인문과학연구소 2002 人文科學 Vol.84 No.-

This study examined the background story of 「Hunwhaga」 in 『Samgukyusa』 from a ritual point of view. The background story of 「Hunwhaga」 handed down from the verse 「Madame Suro」 tells that when Madame Suro desired flowers on a thousand-jang-high cliff on her way to follow her husband who was appointed as a taesoo in Kangreung, an old man passing by picked the flowers and presented them to her singing. Though there have been many interpretations of the background story of 『Hunhwaga』, those discussions can be divided into two in general: one is that the story is about a courtship of an old man who was charmed by the beauty of Madame Suro and the other is that the story is a record of an event which occurred during the rite. Taking symbolism of words appearing in the story into consideration, I believe that the background story of 「Hunwhaga」 should not be interpreted as a love story in an earthly life but a record of a ritual event which occurred during the rite. The ritual representations shown in the background story of Hunwhaga, are haejung(海汀), joosun(晝饍), suckjang(석장), sea, flowers, and so on. Haejung is more of a ritual space than a mere coast and joosun symbolizes the foods offered to a god during the rite rather than an everyday lunch. In the light of the facts that water represents abundance, restoration, and creation and rocks symbolize a center, suckjang and sea are believed to indicate that the space is newly created and divine. In shamanisam, flowers are generally considered to have a divine nature with ability of incantation or deification. Likewise, the flowers on a thousand-jang-high suckjang in the background story of 「Hunwhaga」 can be seen as a symbol of descended divinity during the rite and a representation of liveliness. Such ritual representations suggest that the background story of 「Hunwhaga」 should not be interpreted as a simple love story between a man and a woman but regarded as a ritual event. While interpreting the background story of 「Hunwhaga」, the nature of 「Hunwhaga」 should be noted. Until now, a great deal of researchers have considered 「Hunwhaga」, a song sung during the rite, as an incantation song. This is because many researchers looked upon all the songs sung during rites as the ones to have a nature of incantation. However, I believe not all songs sung during rites necessarily mean that they have a nature of incantation because incantation is defined as 'to obtain one's own purpose borrowing the power of a supernatural existence' but 「Hunwhaga」 itself does not wield such power. Since 「Hunwhaga」, is a song of divinity responding to the prayer of Madame Suro during the rite, it is certainly a ritual song but not a song of incantation. Therefore, this study asserts that regarding 「Hunwhaga」, as a song of incantation should be reconsidered.

발육중인 영구치의 파노라마 방사선 사진 계측을 이용한 연령 추정

최은영,양규호,최남기,김선미 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.2

본 연구는 혼합치열기 아동에 있어서 연령을 추정하는데 치아의 발육을 이용하면서 치아발육의 평가에 객관적인 수치를 이용하여 방정식을 도출함으로써 간단하게 연령을 추정할 수 있는 방법을 연구하고자 하였다. 이를 위해 2002년에서 2004년까지 전남대학교 병원에 내원한 환아 중 7~9세 어린이 120명을 대상으로 얻어진 파노라마 방사선사진을 이용하여 Mornstad에 의해 제시된 발육치아의 치관 길이, 치근 길이, 치근단공 너비를 측정하여 다음과 같은 결과를 얻었다. 1. 연령과 상관성이 높은 계측치로 남아에서는 제 2대구치 치관 길이, 제 1대구치 치근 길이, 제 1소구치 치근단공 너비가 높은 상관성을 보인 반면 여아에서는 제 2소구치 치관 길이, 제 2대구치 치근 길이, 제 1대구치 치근단공 너비가 높은 상관성을 보였다. 2. 상관성이 높은 계측치를 중다선형회귀분석을 사용하여 역령과 연관시켜 연령추정 방정식을 산출하였다. 남아(개월) = 43.958 + 하악 제 2대구치 치관 길이× 4.392 + 하악 제 1대구치 치근 길이× 2.255 - 하악 제 1소구치 치근단공 너비× 2.046 여아(개월) = 75.213 + 하악 제 2소구치 치관 길이× 3.910 + 하악 제 2대구치 치근 길이× 2.280 - 하악 제 1대구치 치근단공 너비× 6.217 위 식을 토대로 측정에 사용되지 않은 남녀 각각 10명의 파노라마 방사선사진을 이용하여 나이를 추정한 결과 남아에서는 -2.1± 6.8개월의 편차를, 여아에서는 6.1± 6.2개월의 편차를 보였다. 이처럼 연령을 모르는 우리나라의 혼합치열기 아동에서 파노라마 방사선 사진을 이용하여 연령 추정 시 위의 방정식을 사용한다면 비교적 정확하게 연령을 추정할 수 있으리라고 사료된다. The aim of this study was to test whether metric measurements of crown length, root length and apex width during tooth development could be a better basis for correlation with age than the classical methods based on subjective estimations of various stages of tooth development. Panoramic radiographs of 120 children, aged 7 to 9 years, were collected from the department of the pediatric dentistry of Chonnam National University Hospital, Korea. The methods of Mornstad was used to estimate age. The structures measured were crown length, root length and apex width in panoramic radiographic. The results were as follows : 1. In the boys, it showed higher correlation between lower 2nd molar crown length, lower 1st molar root length or lower 1st permolar apical width and age. In the girls, it showed higher correlation between lower 2nd premolar crown length, lower 2nd molar root length or lower 1st molar apical width and age. 2. With the aid of a multiple regression model, a linear relationship between some of these distances and age was shown. Boy(months) = 43.958 + lower 2nd molar crown length× 4.392 + lower 1st molar root length× 2.255 - lower 1st permolar apical width× 2.046 Girl(months) = 75.213 + lower 2nd premolar crown length× 3.910 + lower 2nd molar root length× 2.280 - lower 1st molar apical width× 6.217 Age was estimated in boys and girls using the mathematic model; the mean difference between chronological and estimated ages was -2.1± 6.8 months for boys and 6.1± 6.2 months for girls. Therefore, it seems to be more accurate and easier than the earlier methods.

고출력 다이오드 레이저를 이용한 SKD11 표면 열처리 특성

최성대,정선환,양승철,김잠규 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-

An experimental investigation with high power diode laser system was carried out to study the effect of surface heat treatment on the SKD11. The surface heat treatment characteristics of the laser beam were evaluated using hardness tests, optical microscopy, X-ray diffraction and energy dispersive X-ray spectroscopy(EDS). Results indicated that the Hardness were changed by beam size, focal length, feed rates. The micro grain structure was observed retained austenite grain at hardened zone and globular cementite grain at fine grain zone and base metal zone by optical microscopy. The intensive X-ray diffraction patterns of (110)-(200)-(211) was detected on the surface and the hardened surface intensity level was bigger than the unhardened surface. The intensive X-ray diffraction patterns of (110)-(200)-(211) was detected hardened surface and the hardened surface distributed plenty of carbon density than metal zone.

人文系 高校生과 實業系 高校生의 餘暇 時間및 여가 活動에 關한 調査硏究 : 진주지역 고교생을 中心으로 With boy-Students in Jinju as the subject of study

최학의,鄭善太,金泰亨 진주산업대학교 1979 論文集 Vol.17 No.-

1. Aim of study During the present century the differences of curriculam between culture high school and vocational high school have hada great influence of leisure activities and leisure-time. Aim of this study is to analyze leisure activities of culture high school students and vocational high school students and to try to improve the realistic problems. 2. The results and consideration of study shows the following facts. (1) In the side of home envirooment culture high school students are better than Vocational highschool students. (2) All stupents feel confident of their bright futureand health, but culture high school students are weaker than vocational high school students (12%), and are planning their future more carefully. Vocational high school students tend to be discontented with their course, so unexpectedly many of them hope to go on to college (61.8%) (3) Leisure-time, pocket money and the place to amuse the hours of leisure are interrelative. Vocational high school students comparatively have many hours which they can amuse, so they are looking for their interests in such activities as sports and the outdoortsand the outdoor activities. They, then, come to need much pocket money. (4) During vacation most ofstudents stay at home in common. Culture high school students usually spend their fime studying, while Vocational high school students enjoy their dilettante life. (5) Culturehigh school students evaluate leisur-time high in that it is good to the mental hygiene, and vocational high school students in that it is helpful to the physical training and dilettante life. (6) On the whole culture high school students enjoy the passive leisure activities emphasizing the morality, but vocational high school students like the dynamic leisure activities for amusement. (7) The establishment of new valuation is urgently needed to make a reasonable use of leisure-time, money, implements and facilities for leisure activities.