서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

스포츠에 의한 성장기 요추추체종판 장해 분석

김민섭,이종영,이충영,이승훈,임완기,강은균,이종호 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

Apophyseopathy in human growing-up period is divided in three parts, early stage, advancing stage, and ending stage which are analyzed by X-ray test. The tuber of kantenabtrennung, schmorl and rear oxhorn dissociation are one of the these barrier process. We assume that the fracture of apophysis by overusing is the main cause of these barriers.

衛星通信에 관한 硏究 : Filter의 性能改善을 中心으로 Especially on the Improvement of Filter Performance

鄭憲相,宋鐵,劉炳守,朴暢均,白亨來,鄭鍾熙,李炅燮 조선대학교 동력자원연구소 1986 動力資源硏究所誌 Vol.8 No.2

There are two kinds of data transmission communication method, namely, Analog communication method and Digital communication method. The latter has many excellent characteristics as compared with the former. In order to design excellent Digital Filter, the window function is studied in this paper. The conventional time-domain windowing requires N/2 stored values of the data window and N multiplications. A class of windows, called binary windows, for the frequency-domain implementation of the Discrete Fourier Transform is proposed. They do not require multiplications or stored constants ; rather, they are replaced by shift and add operations. These windows offer excellent sidelobe behavior compared with the conventional windows.

一部 小兒바이러스性 肝炎의 臨床·疫學的 考察

李庭勳,柳東俊 慶熙大學校 1987 論文集 Vol.16 No.-

A Clinico-epidemiologic study was performed on 150 children with viral hepatitis who had been admitted in pediatric department of Dong-San Sacred Heart Hospital from January 1984 to December 1985.

腦의 原發性 肉腫 1例 報告

李和東,韓允善,鄭煥永,李憲梓 中央醫學社 1970 中央醫學 Vol.19 No.6

The primary sarcomas of the brain have been considered rare and occur mostly in infants and children. We report one case of primary sarcoma which was diagnosed as a huze intracerebral honiatoma in the left parietote nporal area with a case history and angiographic findings. Flow ever, the operative findings and histopathological report confirmed a primary sarcoma of the brain belonging to unknown type in. Abbott and Kernohan's classification. The tumor was extended into the leptomeninges and the Virchow Robin spaces, invading the cerebral parenchyma with intracetebral hematoma in the left parieto-temporal area. Dura was not invaded by the sarcoma. This is a case of primary sarcoma arising from the leptomeninges in the brain.

Band-to-Band 터널링에 의한 게이트 유기 드레인 누설전류의 이차원 수치해석

이상훈,하영철,송정근,홍창희 東亞大學校 附設 情報通信硏究所 1999 情報通信硏究所論文誌 Vol.7 No.1

In this paper, we investigated the characteristics of gate-induced drain leakage(GIDL) current due to the band-to-band tunneling in off-state n-MOSFET. Two-dimensional process and device simulation were performed by TMA-SUPREM4 and MEDICI. S/D(Single-Diffusion Drain) and LDD(Lightly Doped Drain) devices not applied electrical stress are simulated in order to compare drain engineering effect on GIDL characteristics. GIDL current due to direct interband tunneling in LDD structure was lower than that of S/D structure because of lower n-doping concentration. This result suggests that electric field in the gate-to-drain overlap rgion is a key factor controlling band-to-band tunneling generation rate.

시각 피드백이 조준운동의 제어에 미치는 영향

이강헌,정청희 한국스포츠심리학회 1992 한국스포츠심리학회지 Vol.3 No.1

본 연구는 시각 피드백이 조준 운동의 제어에 미치는 영향을 알아보기 위하여 시각 피드백 처리시간을 과대 평가할 가능성이 있는 요인들을 통제한 상황에서 시각 피드백과 시각 피드백 관련 변인들을 체계적으로 다양하게 통제하여 유사한 네 개의 실험을 수행하였다. 실험1은 다양한 속도로 수행되는 운동하에서 시각 피드백을 다양한 시점에서 철회하여 시각 피드백이 동작실행의 정확성에 미치는 영향을 관찰함으로써 시각 피드백 처리시간을 알아 보려는 의도로 수행하였다. 이와 동시에 시각정보가 일정시간(최소한 250㎳)동안 감각기억(sensory memeoy)의 형태로 표상화되어 기억됨으로써 감각기억에 기초를 둔 동작 제어의 가능성을 검증하기 위함이었다. 실험은 3×5의 2요인 피험자내 설계를 이용하여 시각 피드백과 동작시간 요인을 통제한 가운데 단일 표적조준과제를 이용하여수행하였다. 실험2는 빠른 속도(160㎳)로 수행되는 운동하에서 시각의 철회를, 동작개시를 시점으로 다양하게 지연시켜 시각조건과 비교함으로서 동작 수행 중 시각정보가 어떠한 시점에 영향을 미치는지를 알아보려는 목적으로 수행하였다. 실험은 단일요인 피험자내 설계를 이용하였으며, 실험조건은 시각 피드백을 통제하는 다섯 가지 조건으로 구성하였다. 실험3은 예비신호와 동시에 철회하였던 시각 피드백을 반응신호, 동작개시와 동시에 그리고 동작개시 60㎳후에 부여하여 시각이 조준 동작을 사전에 정하는 데 사용되는 것을 방지한 상황에서 동작실행의 정확성을 관찰함으로써 시각 피드백이 동작실행의 정확성에 미치는 영향을 관찰하고자 하였다. 실험은 단일 요인 피험자내 설계를 이용하였으며, 실험조건은 시각 피드백을 통제하는 네 가지 조건으로 구성하였다. 실험4는 동작거리와 동작시간 그리고 시각 피드백을 통제하는 가운데 동작실행의 정확성을 관찰하여 시각 피드백이 조준운동의 제어에 미치는 영향을 규명하고자 하였다. 실험은 2×2×3의 3요인 피험자내 설계가 이용하여 동작거리와 동작시간 그리고 시각 피드백이 통제되는 가운데 실험을 수행하였다. 수집한 자료를 일차적으로 반응시간과 동작시간에 의하여 자료로서의 채택 여부를 검토한 뒤에 동작실행의 정확성(동작오차)을 분석한 결과, 다음과 같은 결론을 얻었다. 첫째, 시각 피드백은 200㎳ 이내에 빠른 시간에 처리될 수 있다. 둘째, 거리오차의 경우 시각 피드백은 동작의 후기 단계에서 중요하며, 방향오차의 경우에는 시각 피드백이 동작의 초기 단계에서 중요하다. 셋째, 시각조건과 비시각조건 간에서 동작오차의 차이는 150-300㎳의 동작시간에서는 일정하였으나 450㎳의 동작시간에서는 증가하였다. 그리고 이러한 경향은 동작거리가 길수록 강하게 나타났다. The purpose of this study was to investigate the effects of visual feedback on control of aiming movements. Four experiments were conducted in order to test the minimum visual feedback processing time, the role of visual feedback and the effects of movement distance and movement time on visual feedback processing. Experiment 1 was designed to examine the minimum visual feedback processing time. Subjects for the Experiment 1 were 10 males, 28 years old on the average. The task in Experiment 1 was single target aiming with stylus. The movement distance was help constant at 35㎝. Experiment 1 was performed in a 3×52-factors within subject design. Experiment 2 was designed to examine the role of visual feedback in movement phase. Subjects for the Experiment 2 were 10 males, 34years old on the average. The task in Experiment 2 was single target aiming, with movement distance held at 40㎝. Experiment 2 was performed in a single factor within-subject design. Experiment 3 was designed to examine the role of visual feedback in movement phase. Subjects for the Experiment 3 were 10 males, 34 years old on the average. The task of Experiment 3 was the same as Experiment 1, but under four visual feedback conditions. The movement distance was held constant at 30㎝. Experiment 4 was designed to examine the the effects of movement distances (20㎝, 40㎝) and movement times (150㎳, 300㎳, 450㎳) on visual feedback processing. Subjects for the Experiment 4 were 10 males, 32 years old on the average. The task in experiment 4 was the same as in Experiment 1. Experiment 4 was performed with a 2×2×3 3-factor within-subject design. The results of the study are as the followings: 1. The time required to process visual feedback was below 200㎳. 2. Visual feedback was more important for the distance error at the final phase than at the initial phase of the movements. 3. Visual feedback was more important for the dirrection error at the initial phase than at the final phase of movements. 4. The differences in movement errors between light-on light-off conditions at the 150-300 ㎳ movement time were constant, while the difference at the 450㎳ movement time increased. The tendency was stronger in 40㎝ movement distance than in 20㎝ movement distance.

날개끝에서 비균일 분출(blowing)을 주었을 때의 양항특성

鄭勛和,李奉俊 한국항공대학교 1992 論文集 Vol.30 No.-

유체속을 움직이는 유한날개의 상하면에는 압력차가 발생하여 날개끝 와류가 형성되고 유도항력을 생기게 한다. 이러한 유도항력을 감소시킬 목적으로 비균일 날개끝 분출관이란 새로운 항력감소장치를 개발하였다. 비균일 날개끝에 시위방향으로 여러 개의 분출공을 설치한 원형관으로서 일반 항공기에 설치가 용이하다. 본 연구에서는 이러한 비균일 날개끝 분출이 날개의 양항특성에 미치는 영향을 검토하기 위하여 가로세로비가 2.0인 직사각형 날개를 사용하여 풍동실험연구를 수행하였다.연구결과 비균일 날개끝 분출장치는 분출이 없는 기본날개의 양력곡선 기울기를 증가시키고 항력을 감소시키며 양항비를 증가시키는 효과를 나타내었다. A finite wing moving through a fluid induces a differential pressure field between the upper and lower surfaces and produces induced drag. A new drag reduction device called non-uniform wing tip blowing tube was developed to reduce induced drag. Non-uniform wing tip blowing tube is a circular tube with multiple blow holes in chordwise at the wing tip and easily can be installed at the wing of conventional aircraft. In this study, a wind tunnel investigation has been conducted to determine the effects of non-uniform wing tip blowing on the lift and drag characteristics of a rectangular wing of aspect ratio 2.0 The results showed that the non-uniform wing tip blowing device provided the basic wing with an increase in the lift curve slope, a reduction in the drag and an increase in lift-drag ratio.

경쟁상태불안이 수영선수의 경기력에 미치는 영향

이충훈,전도선 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

The purpose of this study was to examined the effect of cognitive anxiety, physical anxiety, and self-confidence as sub-factory of competitive state anxiety of swimming players on the performance in accordance with sex, carrer, level. The subjects were 179 male and female players at a high school and college level. The results of this study canbe summarized as follows. In case of cognitive anxiety, though there were to significant differences in variable factors by sex, level, players with less carrers showed higher anxiety, and in case of physical anxiety, though there were no significant differences in variable factors by sex, level, players with less careers indicated higher anxiety. In case of self-confidence, though there were no significant differences in variable factors by sex and level, players with more careers higher anxiety.

소아기 외과계질환의 통계적 관찰

정용헌,이재호,이건수,서종진 충남대학교 의과대학 지역사회의학연구소 1989 충남의대잡지 Vol.16 No.2

Child is not little man but rather a father of man. Children are faced to surgical and medical problems reqiring various specialists. Authors analized 1126 pediatric surgical in-patients of Chung-nam National Univ. Hospital from Jan. to Dec. 1988 by departments, age, sex, duration of admission and types of diseases in order to get the information for management of children’s hospital. The results are as follows: 1. Absolute numbers of in-patients by departments are above 200 in general surgery and opthalmology, between 100-199 in plastic surgery, ENT, chest surgery and below 99 in urology and neurosurgery. 2. Male to female ratio as a whole is 1.8:1, male dominant. 3. Duration of admission within 1 week was of 55% as a whole, 87% in ENT, 85% in ophthalmology, 13% in orthopedic surgery. 4. Average duration of admission was 10.8 days as a whole, 4.6 days in ENT, 5.1 in ophthalmology, 29.7 days in orthopedic surgery, and variable by types of diseases. 5. The most frequent disease by departments was hernia in general surgery, fracture in orthopedic surgery, cerebral contusion in neurosurgery, ventricular septal defect in chest surgery, strabismus in ophthalmology, tonsillitis & adenoiditis in ENT.