성장기 아동에서의 경추의 화골형태와 두개안면부 성장변화에 관한 연구

한국재,이상호 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.2

The purpose of this study was to investigate the growth patterns of craniofacial areas in association with ossification events of cervical in growing children. The subjects used in this study were 476 children, ranging from 8 to 16 years of age, with good health, none of them recieved orthodontic treatment. Cephalometric radiographs were used to evaluate the growth patterns of the craniofacial area and the cervical vertebrae, and their relationships. Data was analyzed by SAS statistical program on computer. The results were as follows. 1. The chronologic age at peak height velocity(PHV) was 13-14 years in male and 12-13 years in female and it’s timing was synchronous with Cervical Vertebral Stage(CVS) 3-4. 2. The increased measurements in accordance with skeletal maturation of vertebrae were anterior cranial base length, posterior cranial base length, ramus height, mandibular body length, anterior facial height, posterior facial height, facial length, facial depth, SNA, SNB, and facial plane angle. In contrast, The decreased measurements were gonial angle, and mandibular plane(SN)Go Gn) 3. There was a close correlation between the linear growth of the craniofacial area and skeletal maturity of the cervical vertebrae but the angular measurements and the denture pattern showed a low correlation with the skeletal maturation of the cervical vertebrae. 4. The growth rate of the cranial area was even but that of the mandibular area was in peak synchronous with pubertal growth spurt of cervical vertebrae. 5. The timing of each skeletal stage of the cervical vertebrae forward in girls than of in boys but the linear measurements of the craniofacial area were larger in boys than those of in girls at each stage of skeletal maturity of the cervical vertebrae.

한국 재래 산양에서 Leptospira spp.에 대한 혈청역학적 연구

한동운,권용국,문진산,윤소라,위성환,장환,탁동섭,이태욱,강문일 한국수의공중보건학회 2003 예방수의학회지 Vol.27 No.3

Between January 1999 and September 2001, 948 sera (120 from each province except 108 from Chungbuk) from 8 provinces were sampled from Korean goats. All the samples were serologically tested for Leptospira spp. By the microscopic agglutination test against four L. interrogans serovars including canicola, icterohaemorrhagiae, pomona and hardjo, 948 Korean goats were confirmed as 11 seropositives (1.2%) only infected with L. icterohemorrhagiae. All positive sera were collected from Gyeonggi (5), Gangwon (4) and Chungbuk (2). Titration of them were classified as 1:100 of 10 sera except one case with 1:200 from Gyeonggi. It was meaningful that the pathogen in Korean goats was mainly distributed in the northen part of the country. Consequently, the results in the study were confirmed and analyzed the recent status of infection of leptospirosisas zoonotic agentsome in Korean goats.

한국 재래산양에서 Bovine Viral Diarrhea, Bovine Herpesvirus-1, Parainfluenza Type-3 바이러스에 대한 혈청학적 연구

한동운,권용국,문진산,윤소라,위성환,장환,탁동섭,이태욱,강문일 한국수의공중보건학회 2003 예방수의학회지 Vol.27 No.3

The 948 goat sera were serologically tested for ten pathogens including bovine viral diarrhea (BVD), bovine herpes virus type-1 (BHV-1) and parainfluenza virus type-3 (PI-3). By viral neutralizaion test, three pathogens including BVD virus, BHV-1, PI-3 were applied for screening each neutralizing antibody and its titration. Among 948 sera, there were 215 seropositives (22.7%) against BVD virus, 25 (2.6%) against BHV-1 virus, and 161 (17.0%) against PI-3 virus, respectively. In the seropositive cases to BVD virus, provincial prevalence of them were recorded as Gyeongnam(30.8%) for the highest one, while as Jeonbuk (15.8%) and Gyeongbuk(l6.7%) relatively for the lower ones. Among them, higher than 1:8 in antibody titration was classified as 74 cases (34.4%) which were suspected the cycle of its infection in their herds. Among the seropositives to BHV-1, it was relatively lower prevalence rate ranging from 1.7% to 6.7% that those of BVD virus and PI-3, but more importantly they were prevailing across the country. Most of the seropositive cases (42.9%) to PI-3 were classified as 1:4-1:16 in titration, but also distributed all around the country. The prevalence in goats varied according to areas (15.8 to 30.8%). Related to the provincial prevalence of three viral agents in Korean goats, it seemed that three viral pathogens would be directly or indirectly involving in various disorders as primary or secondary causative agents resulting in decreased productivity.

유방암의 nm23 단백 발현 - 면역조직화학적 연구 -

송상용,지제근,한세환,최국진 대한병리학회 1995 Journal of Pathology and Translational Medicine Vol.29 No.4

E-screen assay법을 이용한 농약화학물질의 에스트로겐 활성 연구

한상국 한국환경과학회 2004 한국환경과학회지 Vol.13 No.6

In this study, sixty chemicals including 47 pesticides were screened for estrogenic activity using E-screen assay. MCF-7 cell, used in E-screen assay, is known to be proliferated by addition of estrogenic chemicals. Eight of the measured pesticides showed estrogenic activity at the concentration range of 100-10,000nM. Their relative proliferative effect (RPE) and the relative proliferative potency (RPP) were 20-65% and 0.01-1.0%, respectively, when compared with 1.0nM of β-Estradiol-17-acetate(E₂). DDVP and diazinone showed most strong estrogenic potency(RPP; 1.0%) and effect(RPE; 65%) of the eight pesticides. These results are in agreement with estrogenic activity of bisphenol A is known as a positive endocrine disrupter. Also, in this study, paraquat, DDVP, 4-chloro-3-methylphenol, 2,4,6-trichlorophenol and diazinon of the measured pesticides are estimated to estrogenic chemical.

차량용 점화코일 고속가공기에 관한 연구

곽상국,한창우 영남이공대학 2002 論文集 Vol.31 No.-

Automotive Ignition coil is to transform the normal battery voltage of 12V to the second voltage of approximately 20∼30KV by discharging and mutual induction., then the induction current loss should be happened by insulation resistance, increasement. In this study, the new model of high speed machine of the automotive ignition coil to solve the problem by completing the wire alignment and speeding the wire winding is introduced. By analysing mechanism of the system governing equations of the system is obtained. In these cautions it is known that the wire tension can be controlled by the constant velocity control. Which is proved by the experiment. In addtion to, it is proved that tension profile is the indicator which judges wire alignment situation by the experiment. Pm velocity controller in winding bobbin motor, PI position, PID velocity controllers in winding guide motor, tension controller in electrical brake, and tension bar make wire winding speed and tension be stable. As the result, the high speed machine of the automotive ignition coil in the winding speed of 600 RPM is developed. Therefore by compacting wire winding alignment and speeding wire winding, it is expected that the performance of automotive ignition pail should be improved, the efficiency of engine output should be increased, and the amount of the emission gas should be decreased.

α-ZnAl₂S₄단결정의 Energy Gap의 온도 의존성에 대한 열역학적 함수 추정

심상흥,심낙순,박종국,오재한,박광호 三陟大學校 1999 論文集 Vol.32 No.1

In this work ? single crystals were grown by the chemical transporting reaction(CTR) method using high purity(6N) elements. The structure of grown ZnAl2S4 single crystals were cubic structure. The optical energy band gap was indirect band gap and the temperature dependence of optical energy gap was fitted well to Varshni equation. Also, the entropy, enthalpy and heat capacity were deduced from the temperature dependence of optical energy gap.

한강수계의 고회수율 UF 막여과 정수처리 공정의 적용

이태국 ( Tae Kuk Lee ),김지훈 ( Ji Hoon Kim ),김동수 ( Dong Soo Kim ),홍성호 ( Sung Ho Hong ),박민구 ( Min Koo Park ),박정은 ( Jung Eun Park ),한명애 ( Myung Ae Han ),김병훈 ( Byung Hoon Kim ),김형수 ( Hyung Soo Kim ) 한국물환경학회 ( 구 한국수질보전학회 ) 2008 공동 추계학술발표회 Vol.2008 No.-

단면계수 라이브러리 개발에 관한 연구

박노국,강신한,장성국 尙志大學校 生産技術硏究所 1998 生産技術論叢 Vol.- No.4

The software consists of GUI module for windows environment on PC and section property calculation module. User selects the section type in menu for beam library on window and inputs the shape data using dialog box displayed by GUI module. The calculation module calculates its properties such as area, centroid, moment of inertia, torsional constant, etc.. By using the developed software, the time for calculation, conversion and management of data can be reduced and it is able to promote the efficiency of analysis and design takes. In this paper described is the software developed to calculate the physical properties of typical beam section.

비침습적 검사를 이용한 수술후 하지 심부 정맥 혈전증의 감시

김영욱,정한준,윤봉호,김신윤,이상국,변경환,김태헌 경북대학교 병원 1997 경북대학교병원의학연구소논문집 Vol.1 No.1

Deep vein thrombosis is recognized as a common complication in surgical patients in western countries especially in patients with high risk factors. The purposes of this study were to detect leg DVTs in early postoperative period by non-invasive surveillance and to analyze the risk factors of DVT. One hundred seventy one patients who underwent major operations(67 curative resection of colorectal cancer, 64 total hip replacement, 38 femur operation for fracture, and 2 colon resections for benign colon disease) were included for the prospective surveillance of leg DVT within 2 weeks after the operations. For the surveillance of leg DVT, strain gauge plethysmography(SPG) and Duplex scanning of both legs were completed for all patients except 10 patients. These 10 patients were examined in only one leg. The patients with past history of leg DVT or under prophylactic anticoagulant therapy were excluded from this study. To determine the risk factors related with leg DVT formation, age and sex of the patients, indication of surgery or surgical procedures, duration of operation, position during the operation, duration of postoperative immobilization, and preoperative serum level of antithrombin III (AT- III) were analyzed using Chi-square test. After performing SPG of 342 legs, 38 legs, showed abnormal on venous outflow/venous capacitance discriminant line chart, and 13 legs of 12 patients showed the finding(s) suggesting DVT on duplex scanning. Among the patients with abnormal duplex findings, 7 limbs(53.8%) were symptomatic, but the remaining 6 legs were silent. In 6 (15.8%) patients of 36 femur operations, 3(4.7%) of 64 total hip replacements and 3(4.5%) of 67 curative resections of colorectal cancer developed DVT by duplex scanning in the iliac(5), femoral-popliteal(6), and isolated calf(2) veins. After analyzing the risk factors, we could not find any statistically significant(p<0.05) factor related with leg DVT.