Park's Vector 기법을 이용한 소형 3상 유도 전동기의 권선 고장 진단

한민관(Min-kwan Han),우혁재(Hyeok-jae Woo),송명현(Myung-hyun Song),박규남(Kyu-nam Park) 대한전기학회 2003 대한전기학회 학술대회 논문집 Vol.2003 No.7

間歇的 運動에 의한 脫水 및 水分攝取의 生理的 效果

朴哲浩,朴吉俊,李相于,金永明,朴贊熙,玄松子,呂南會,朴相甲,金榮俊 東亞大學校附設스포츠科學硏究所 1989 스포츠科學硏究論文集 Vol.7 No.-

This study aims at revealing the physiological responses of dehydration (DH) and rehydration (RH) in intermittent exercises at the work intensity of 70% HR max. First, with general student public, three times of exercise (each for 20 minutes) at the given work intensity were taken, with a break for 25 minutes respectively. Their heart rate, rectal temperature and plasma electrolyte concentration both DH and RH were measured. Second, in two groups of athletes and non-athletes, 9 rounds of exercise (for 100 minutes) and 8 breaks (for 60 minutes) were taken, with RH forced 10 times to compensate for the subjects' water loss. Their change in sweat loss and plasma electrolyte concentration as well as the IVDP(Intensive Voluntary dehydration Phenomenon) were experimented. The summary of this research follows. 1) Mean heart rate and rectal temperature in intermittent exercises were higher at DH than at RH, growing up at the increasing level of DH. 2) RH saw no change in the plasma concentration of Na+, K+ and Cl-, while DH observed a significant increase. 3) HCO₃made a significant decrease at DH before growing up. 4) Mg++ had no change, while Ca++ increased significantly at RH and DH. 5) Lactate showed an increase with significance at RH and DH, especially greater at DH. 6) Osmotic pressure increased meaningfully at DH. 7) Anion gap increased significantly at DH and RH. 8) On the other hand, when the forced RH was held, the group of athletes had greater sweat loss per body surface area than that of non-athletes. 9) The athletes' plasma concentration of Na+ and Cl- revealed a clear decrease. 10) There was seen no significant change in the plasma concentration of K+, Mg++ and Ca++ in both groups. 11) The IVDP occurred at the RH of 2.3ℓfor athletes and more than 2.5ℓfor no-athletes.

유해화학물질의 계통분석

박성우,박유신,이진훈,유재훈,김유나,오세진,이진숙,김남이,박종신,남금문,노동석 內務部 國立科學搜査硏究所 2002 國立 科學 搜査 硏究所 年報 Vol.34 No.-

The insect community structure with indicator species along vegetation composition in Is. Nam-hae, South Korea

Jong Woo NAM,Shin Young PARK,Ik Jae CHOI,Young Min SHIN,Il-Kwon KIM 한국응용곤충학회 2015 한국응용곤충학회 학술대회논문집 Vol.2015 No.04

An insect faunal survey was carried out to investigate insect community structure along the vegetation community to monitor insect species in forest ecosystem. We performed day and night collections from June to August along three vegetation communities of Is. Nam-hae in 2014: the first stand with Pinus thunbergii, the second P. thunbergii with Quercus serrata and the third P. thunbergii with various Quercus species. In total 2,259 individuals of 532 species, 99 families, 13 orders are identified. Cluster Analyses (CA) showed that all three vegetation communities were relatively similar between vegetation community types. According to indicator species analysis (ISA) result, nine significant indicator species were identified (p < 0.05); five species were found to be affected by the vegetation cluster and four species the month cluster.

LabVIEW를 이용한 소형 유도전동기의 권선고장 자동진단

宋明現(Myung-Hyun Song),朴奎南(Kyu-Nam Park),韓東奇(Dong-Gi Han),禹奕在(Hyeok-Jae Woo) 대한전기학회 2006 전기학회논문지 P Vol.55 No.4

In this paper, an auto detection method of stator winding fault of small induction motor is suggested. The Park's vector pattern which is obtained from 3-phase current signal by d-q transforming, is very good to detect winding fault. Comparing the Park's vector pattern of testing motor with its of healthy motor, the Park's vector pattern of fault motor is became an ellipse and the asymmetry is increased by the winding fault serios. So for detecting the dis-symmetry, id-filtered function, Min-value, and Max-value are suggested for auto detecting. Using LabVIEW programing, 3-phase healthy motor and several kind of winding fault motors are tested and the test results are shown that the suggested method can gives us a possibility of an auto detecting winding fault.

월아산 근린공원의 식생구조와 동태

노일,조현남,박우진,문현식 경상대학교 농과대학 부속연습림 2001 演習林硏究報告 Vol.- No.11

The objectives of this study was to investigate the vegetation structure and dynamics in the urban neighborhood park of Mt. Weola. The results obtained were as follows; 1. The woody plants of 18 species are distributed in upper story. By importance value, the upper story was dominated in the order of Pinus densiflora, Qoercus variabilis, Robinia pseudoacacia, Platycarya strobilacea, Alnus firma, Quercus aliena, Carpinus laxiflora. 2. In middle story is formed by 23 species with dominated in the order of Rhus trichocarpa, Prunus sargentii, Quercus variabilis, Platycarya strobilacea, Carpinus laxiflora, Quercus serrata by importance value. 3. 68 species is forming the upper story. Importance values of dominated species was in the order of Rhus trichocarpa, Indigofera kirilowii, Lesdedeza bicolor, Quercus variabilis, Smilax china, Lindera glauca. 4. 78 species is distributed in herbaceous story. And, importance value was high in the order of Oplismenus undulatifolius, Carex siderosticta, Disporum smilacinum, Phryma leptostachya var. asiatica, Paederia scandens, Carex humilis, Spodiopogon sibiricus. 5. The species diversity and evenness in each story were 0.751 and 0.598 for upper story, 0.473 and 0.347 for middle story, 1.429 and 0.794 for lower story and 1.125 and 0.594 for herbaceous story, respectively.

2차원 Magnetic Fluxgate 센서의 구현에 관한 연구

박용우,김남호,류지구 한국센서학회 2002 센서학회지 Vol.11 No.2

본 연구에서는 페라이트 링 코어를 이용한 2차원 fluxgate 센서를 제안하였으며, 본 fluxgate센서 시스템은 2차원 자장을 측정할 수 있는 센서와 그 센서를 구동하기 위한 구동회로, 그리고 신호처리회로 등으로 구성하였다. 신호 검출 방법으로는 우수고조파 성분 검출을 위해 PSD(phase sensitivity detector) 회로를 사용하였으며, 기존의 제 2고조파 검출법과 비교하기 위해서 pick-up 코일 출력전압의 제 2고조파 성분을 FFT 스펙트럼 분석기를 사용하여 측정하였고, 이렇게 측정된 제 2고조파 성분의 전압과 PSD 단의 출력전압을 비교하였다. 그 결과 여자전류의 증가에 따라 센서의 출력전압도 증가하였으며 구동주파수에 따른 PSD 단의 출력전압은 주파수가 1.5[kHz]일 때가지는 증가하였지만, 그 이상의 주파수에서는 감소함을 보였다. 그리고 pick-up 코일의 제 2고조파 성분의 전압은 계속 증가함을 보였다. 센서의 최대감도는 구동주파수 1.5 [kHz], 구동전류 2 [App]에서 최대값을 보였으며 감도는 약 1580 [V/T]였다. 센서의 비선형계수는 3 [G]이내에서 제 2고조파 성분의 전압인 경우 약 1 [%]이내 였으며, PSD 단 이후는 약 2.3 [%]이내였다. 그리고 각도오차는 약 ± 2 [%/FS]이내였다. We have presented a 2-dimensional fluxgate sensor with ferrite core, excitation, and pick-up coil. This fluxgate sensor system consists of a sensing element, driving circuits for excitation coil and signal processing for detecting second harmonic frequency component which is proportional to the DC magnetic to be measured. The sensor core is excited by a square waveform of voltage through the excitation coil of 80 turns. The second harmonic output of pick-up coil(x and y axis: 100 turns) is measured by FFT spectrum analyzer. This result is compared with output of PSD(phase sensitive detector) unit for detecting the second harmonic component. The measured maximum sensitivity is about 1580 V/T at driving frequency of 1.5 kHz and excitation current of 2 App. The nonlinearity of this system is measured about 2.3 %(PSD) and about 1 %(second harmonics of the pick-up). The angle error of the system is ±2 %/FS.

열 변화에 의한 구리전선의 미세조직 및 상 변화에 관한 연구(Ⅲ)

박성우,김윤회,김상현,박남규,김수철,김영만 內務部 國立科學搜査硏究所 2002 國立 科學 搜査 硏究所 年報 Vol.34 No.-

3차원 두부영상의 기준좌표계 설정을 위한 연구 : Ⅰ부CT영상에서 3차원 계측점의 재현성 Part ⅠReproducibility of 3D cephalometric landmarks

박재우,김남국,장영일 대한치과교정학회 2005 대한치과교정학회지 Vol.35 No.5

이 연구는 기존의 두부방사선사진에서 사용되었던 계측점들을 3차원으로 재구성한 CT자료에서 다시 정의하고, 그 점들의 재현도를 조사함으로써, 재현성이 높고 해부학적 특징을 잘 표현하는 점들을 제안하고자 시행하였다. 3차원 영상에서 상대적 좌표값을 구하기 위해 어느 4점도 같은 평면에 존재하지 않는 7개의 고정점을 선정하여 기준 좌표계를 설정하였다. V works 4.0 (Cybermed Inc., Seoul, Korea)을 이용하여 고정점과 Ⅰ점 설정을 위한 volume model (voxel size=4*4*2, threshold value = 639)을 형성한 후 계측점을 선택하였으며, 나머지 점들은 모두 volume mode의 MPR 창을 이용하여 선정하였다. 이렇게 선정한 계측점을 V surgery(Cybermed Inc., Seoul Korea)로 이출하여 각 점의 상대적 공간 좌표값을 구하였다. 모든 자료는 2주 간격으로 2번 측정한 후 재현도를 계산하였다. 각 계측점의 재현도는 x축 0.13~1.24mm. y축 0.23~1.53mm, z축 0.15~1.81mm로 유사한 범위를 보였다. 재현도가 우수한 것은 고정점을 이용한 I점이며 봉합에 의해 정의되는 J점의 재현도가 비교적 낮게 나타났다. The purpose of this study was to redefine the cephalometric landmarks in three-dimensional (3D) images, which are used in orthodontic cephalometric radiography, and to evaluate the reproducibility of each landmark for 3D cephalometric analysis. Eighteen CT scans were taken at the Department of Diagnostic Radiology at Seoul National University Dental Hospital and manipulated with V works 4.0(Cybermed Inc., Seoul, Korea). The coordinate system was established using 7 reference points, with no more than 4 points on the same plane. These 7 points were generated as a volume model, the voxel size of which was 4 by 4 by 2 (threshold value=639). The cephalometric landmarks were selected at the multiplanar reformation (MPR) window on the volume mode of V works 4.0. The selected landmarks were exported to V surgery (Cybermed Inc., Seoul, Korea) for the calculation of coordinate values. All the data were taken twice with a lapse of 2 weeks by one investigator. The reproducibility of each landmark was 0.17~1.21 mm in the x axis, 0.30~1.53 mm in the y axis, and 0.27~1.81 mm in the z axis. In all three axes, the range of error was similar. These error ranges were acceptable with regards to the pixel space and slice thickness. The most reproducible points were I points which were selected on the basis of the volume model. The least reproducible points were J points that were defined by sutures.

圓光醫大 附屬 第2病院 神經精神科 患者에 對한 統計的 考察(Ⅱ)

박민철,장광철,김상원,김한주,유미경,김훈,유용진,김현정,박남진,오상우,이귀행,노승호,백영석 圓光大學校 醫科大學 神經精神科學敎室 1992 圓光精神醫學 Vol.8 No.1

본 연구는 1986년 7월 11일부터 1991년 7월 10일까지 원광의대 부속 제2병원 신경정신과에서 의래 및 입원치료를 받았던 6,072명의 환자를 대상으로 병원 역학조사를 실시하고 그 결과를 1차조사 (박민철 등1986)와 비교했다. 1.전체 환자 중 남자가 54.4%로 여자보다 많았고, 이리와 이리 인접지역이 84.0%로 대부분의 지역을 나타났다. 의료보장상태는 보험환자가 57.1%, 의료보호환자21.8%, 일반환자 21.1%였으며 연령별로는 20대 24.6%, 30대 22.8%로 20대 30대가 절반정도를 차지했다. 2.외래환자에서는 신경중성장애가 46.0%로 가장 많고 정동장애, 경련성장애 순이며, 입원환자에서는 정신분열증이 30.5%로 가장 많고 기질성정신장애, 정동장애의 순이었다. 3.남자는 신경증성쟝애(23.4%), 정신분열증, 기질성정신장애 순이고 여자는 신경증성장애(39.9%), 정동장애, 정신분열증의 순이었다. 남자가 여자보다 많은 진단은 알코올정신장애(94.6%), 기질성정신장애, 소아정신장애 순이고, 여자가 남자보다 많은 진단은 정동장애(64.5%), 신경증성장애였다. 4.진단별 연령분포에서 신경증성장에는 30대(25.3%), 20대, 40대 순이고, 정신분열증은 20대(40.5%), 30대, 40대 순이며, 정동장애는 20대, 30대, 50대 순이나 비교적 비슷한 융이었다. 5.진단별 발병연령에서 신경증성장에는 20대, 30대가 절반이고,정신분열증은 20대(51.3%), 10대, 30대 순이며 정동장애는 20대(30.7%), 30대, 50대 순이었다. 진단별 평균 발병연령은 신경증성장애 32.7세, 정동장애 36.1세, 정신분열증 23.6세였다. 6.진단별 이병기간은 2년이상이 신경증성장에 28.3%, 정신분열증 68.5% 정동장애 43.9%인데 전체적으로 41.0%였다. 진단별 평균 이병기간은 정신분열증 73.2개월, 정동장애 45.5개월, 신경증성장애 29.5개월이었다. We examined epidemiologic study of 6,072 patients who visited Wonkwang Neuropsychiatric hospital since July 11 of 1986 until July 10 of 1991 and compared this results with previous study(Park et al 1986). The study revealed as follows:1. Of total patients males visited this hosptial more than females as 57.1%, Most of them(84.0%) resided Iri and neighbouring Iri. In the point of insurance, insured patients, medicaid patients and uninsured patients were 57.1%, 21.8% and 21.1% respectively. On the distribution of age, the twenties, the thirties were 24.6%, 22.8% respectively and twenties and thirties were about half of total patients. 2. Of outpatients neurotic disorder was the most as 46.0%, secondly mood disorder and thirdly convulsive disorder, but of inpatients schizophrenia was the most as 30.5%, secondly organic mental disorder and thirdly mood disorder. 3. Of males neurotic disorder was the most as 23.4%, secondly schizophrenia, and thirdly organic mental disorder, but of females neurotic disorder was the most as 39.9%, secondly mood disorder and thirdly schizophrenia. alcoholic mental disorder(94.6%), organic mental disorder, child mental disorder were mostly found in males,but mood disorder(64.5%) and neurotic disorder were mostly found in females. 4. On the distribution of age neurotic disorder was found the most in the thirties(25.3%), next in the twenties and in the forties, and schizophrenia was found the most in the twenties(40.5%), next in the thirties and in the forties, but mood disorder was found the most in the twenties, next in the thirties and in the forties but revealed similar rates relatively. 5. On the distribution of age of onset neurotic disorder developed nearly half during the twrnties and the thirties, schizophrenia developed mostly during the twenties (51.3%), secondly the teens and thirdly the thirties, but mood disorder developed firstly the twenties(30.7%), secondly the thirties and thirdly the fifties. on the average age of onset of illness neurotic disorder, mood disorder and schizophrenia were 32.7 years, 36.1 years and 23.6 years respectively. 6. On the duration of illness more than two years was 28.3% in neurotic disorder, 68.5% in schizophrenia and 3.9% in mood disorder and on the average duration of illness schizophrenia, mood disorder and neurotic disorder were 73.2 months, 45.5 months and 29.5 months respectively.