Plasma estradiol-17βand estrogen receptor increased during the artificial induce sexual maturation and it influence choriocapillary layer of eye in Japanese eel, Anguilla japonica

Ji-Yeon Hyeon,Sung-Pyo Hur,Jun-Hwan Byun,Eun-Su Kim3,Shin-Kwon Kim,Han-Jun Kim,Se-Jae Kim,Akihiro Takemura 한국수산해양기술학회(구 한국어업기술학회) 2018 한국수산해양기술학회 학술발표대회 Vol.2018 No.11

바이오 디젤유를 차량 적용 시 입자 배출가스 특성에 관한 연구

김세준,정민원,김병준,유종식,차경옥 明知大學校 産業技術硏究所 2007 産業技術硏究所論文集 Vol.26 No.-

In this study, diesel passenger vehicle were measured on. chassis dynamometer test bench. this base engine was investigated by number measurement. so the particulate matter and gaseous emission were measured each test vehicle, fuel, mode condition on chassis dynamometer test bench that using the apparatus recommended by PMP(Particle Measurement Program) A condensation particle counter (CPC) system was applied to measure the particle number and size concentration of diesel exhaust particles at the end of dilution tunnel along the NEDC vehicle test mode. The effects of Bio diesel fuel on the Diesel nano particle number and size distribution was investigated in this study.

디젤엔진의 배기시스템에서 산화 촉매가 극미세입자 발생에 미치는 영향에 관한 실험적 연구

김세준,이해철,차경옥,이진욱 明知大學校 産業技術硏究所 2006 産業技術硏究所論文集 Vol.25 No.-

Recently, the Diesel PM's number concentration emitted by Diesel internal combustion engine has focused on attention because this particle matters are suspected being hazardous of human health. In this study, particle condensations and size distribution were measured in the exhaust system of a turbo charged diesel engine, equipped with a diesel oxidation catalyst(DOC). A scanning mobility particle sizer(SMPS) system was applied to measure the particle number and size concentration of diesel exhaust particles, at the front and rear position of diesel oxidation catalyst(DOC) along the engine speed and load conditions. As the result, the effects of diesel oxidation catalyst(DOC) on the Diesel nano particle number and size distribution will be represented in this study.

이동로봇의 장애물 회피기술

김준홍,심병균,오세봉,Nguyen Huu Cong,한성현 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-

In this paper, it is presented a new approach to the design of intelligent control system of a autonomous robot with two drive wheel. The proposed control scheme uses a Gaussian function as a unit function in the fuzzy neural network, and back propagation algorithm to train the fuzzy neural network controller in the framework of the specialized learning architecture, It is proposed a learning controller consisting of two neural network-fuzzy based on independent reasoning and a connection net with fixed weights to simply the neural networks-fuzzy. The performance of the proposed controller is shown by performing the computer simulation for trajectory tracking of the speed and azimuth of a mobile robot driven by two independent wheels

구순구개열환자에서 자가입자망상골을 이용한 이차성 치조골이식에 관한 임상적 연구

김종렬,진성준,조영철,표세정,변준호 대한악안면성형재건외과학회 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.2

Purpose : This study is conducted to evaluate the clinical success of secondary alveolar bone grafting using autogenous iliac particulate cancellous bone marrow in cleft maxilla. Materials and methods : We evaluated 107 cleft patients who had been admitted to the Dept. of Oral and Maxillofacial Surgery of Pusan National University Hospital from January 1, 1991 to January 31, 1999 and had been performed secondary alveola bone grafting with autogenous particulated cancellous bone marrow from iliac crest. Results : 1. Men were 70 and women were 37, which shows 65.4% and 34.6% and the proportion of males to females was 1.9: 1. Unilateral cases were 89(83.2%) and bilateral cases were 18(16.8%). 2, Age of bone grafting is widely distributed from 7 to 29, and the average was 13.2. 3. Success rate was 97.8% in unilateral cases, 94.4% in bilateral cases. Overall success rate was 96.7%. 4. We evaluated the bone graft contour by the percentage of bone attachment level adjacent to the alveolar cleft and the menial side showed 82.4% and the distal 87.7%. 5. The amount of notching the alveolar ridge at the grafted site through the ratio of notching length up to the most apical base to the length of proximal segment anatomic root was 0.19.

라이시안 페이딩 환경에서 RAKE 수신 다이버시티를 적용한 BCH 부호화된 DS-CDMA 16 QAM 신호의 성능 해석

김세준,김언곤 한밭대학교 2004 한밭대학교 논문집 Vol.21 No.-

In this paper, we analyzed the error rate performance of BCH coded DS-CDMA 16 QAM signal with rake diversity reception technique in Rician fading environments. In order to improve BER performance in poor channel environments, we have introduced the rake receiver to effectively use against multipath fading and the BCH code well known as a channel coder. With the results of analysis, rake diversity technique is found that performance improvement is shown by increase of receiving antenna number. And it is found that a synergistic performance improvement is shown to both rake diversity reception and BCH coding techniques overcoming mobile wireless data communication channel environments.

디젤승용 차량에서 배출되는 가스상 물질과 극미세 입자상 물질을 차량시험모드에 따른 실험적 분석

김세준,정민원,김병준,유종식,차경옥 明知大學校 産業技術硏究所 2007 産業技術硏究所論文集 Vol.26 No.-

Recently, the nano-PM's number concentration emitted by diesel internal combustion engine has drawn attentions because this particulate matters are suspected being hazardous of human health. In this study, The nano-PM mass and size of diesel passenger vehicles were measured on chassis dynamometer test bench. The particulate matters (PM) emissions of these vehicles were investigated for number concentration too. A condensation particle counter (CPC) system was applied to measure the particle number and size concentration of diesel exhaust particles at the end of dilution tunnel along the NEDC(ECE1 5+EUDC) and CVS-75 vehicle test mode. As the research result, the characteristic of vehicle test mode on the diesel nano-particle number and size distribution was investigated in this study.

라이시안 페이딩 환경에서 다중 송신/수신 안테나 다이버시티를 적용한 길쌈 부호화된 DS-CDMA 16 QAM 신호의 성능 해석

김세준,김언곤 한밭대학교 2004 한밭대학교 논문집 Vol.21 No.-

In this paper, we analyzed the error rate performance of Convolution coded DS-CDMA 16 QAM signal with multiple transmit/receive antenna diversity reception technique in Rician fading environments. Multiple transmit/receive antenna diversity technique is that the convolution coded DS-CDMA 16 QAM signal is sent from multiple transmitting antennas with intentional time delays and received with diversity reception technique from each receiver antenna. With the results of analysis, it is possible to achieve additional diversity gain with conbination of the transmit antenna and receive antenna diversity technique. And also using convolution coding technique, it is found that performance improvement effect to overcome more effectively wireless data communication channel environments is shown.

K3에 축적된 내부 응력이 피로 파절에 미치는 영향

김준영,김진우,조경모,박세희 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2

Objectives: This study aimed to evaluate the relationship between the cyclic fatigue of a K3 file and internal stress intentionally induced until the activation of the auto-stop function of the torque-controlled motor. Materials and Methods: K3 (Sybron Endo) .04 and .06 taper, size 25, 30, 35, 40 and 45 were used in this study. To give the internal stress, the K3 files were put into the .02 taper Endo-Training-Bloc (Dentsply Maillefer until the activation of the auto-stop function of the torque-controlled motor. The rotation speed was 300 rpm and torque value was 1.0 N·cm. K3 were grouped by the number of induced internal stress and randomly distributed to 4 experimental groups (n = 10, Stress 0 [control], Stress 1, Stress 2 and Stress 3). For measuring the cyclic fatigue failure, the K3 files were worked against a sloped glass block and time for file separation was recorded. Data was statistically analyzed Statistical analyses were performed using two-way ANOVA and Duncan post-hoc test at p < 0.05 level. Results: Except .04 taper size 30 in Stress 1 group, there were statistically significant differences in time for file separation between control and all experimental groups. K3 with .04 taper showed higher cyclic fatigue resistance than those of .06 taper. Conclusion: In the limitation of this study, the cyclic fatigue of the K3 file was influenced by the accumulated internal stress from use until the auto-stop function was activated by the torque-controlled motor. Therefore, clinicians should avoid the reuse of the K3 file that has undergone auto-stops. (Restor Dent Endod 2012;37(2):74-78)

만성폐쇄성폐질환의 중증도와 폐고혈압 및 폐성심으로 진행과의 상관관계

김형호,박철진,이준,장광표,하성일,이재록,하재화,권세훈,권용운,윤성호,이승일 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.2

Background: From many previous studies, Pulmonary hypertension is the known independent predictive factor of the mortality in COPD. Also pulmonary hypertension is the major cardiovascular complication of COPD and is associated with the progression to cor pulmonale and poor prognosis. Author want to analyze the correlation between pulmonary hypertension and the severity of COPD which are classified by forced expiratory volume in one second, and the extent of progression to corpulmonale. Methods: Retrospectively we investigated the medical records of 118 patients with COPD who had pulmonary function test and echocardiogaphy more than one times during one-year follow-up (from June, 2005 to May, 2006) at respiratory division in chosun university hospital, and then 50 patients were enrolled in this study. We classified the severity from FEVl in pulmonary function test based on the GOLD guideline, also this was comparably analyzed with RVSP, RVIDd, Visual Grading from echocardiography. Results: 16 patients out of 50 were classified as moderate severity, 25 patients were severe, and 9 patients were very severe group. RVSP was higher in more severe groups than less severe groups but when it comes to pulmonary hypertension that RVSP is over 35 mmHg, there was no valid difference lies in those groups. As FEVl decreases RVSP and RVIDd increases, and observed relationship between RVSP which was classified as below 35 mm and above 35 mm groups and visual grading which was classified as normal and dilatated groups revealed valid correlation, Conclusion: As pulmonary function decreases, progression to pulmonary hypertension and cor pulmonale increases but there was no remarkable difference of prevalence in above moderate severity groups. 연구배경 폐고혈압은 이전의 많은 연구에서 만성폐쇄성폐질환에서 독립적인 사망의 예측인자로 알려져 있다. 또한 폐고혈압은 만성폐쇄성폐질환의 주요한 심혈관계 합병증이며, 폐성심으로의 진행 및 불량한 예후와도 관련되어 있다. 이에 저자는 폐고혈압과 1초간 노력성호기량으로 분류되는 만성폐쇄성폐질환의 중증도 및 폐성심으로의 진행 정도를 비교 분석하여 이들의 상관관계를 밝혀보고자 한다. 방법 2005년 6월부터 2006년 5월까지 1년 동안 본 병원 호흡기 내과에서 폐기능검사와 심장초음파 검사를 각각 1회 이상 시행한 적이 있는 118명에 한하여 의무기록을 후향적으로 조사하여 이 중에서 50명을 대상으로 하였다. 폐기능검사 시행 결과 얻은 1초간 노력성호기량을 바탕으로 GOLD guideline에 따라 중증도를 분류하였으며 이를 심초음파 시행 결과 얻은 우심실수축기압, 확장기말 우심실내부간격, 시각등급과 비교분석하였다. 결과 대상 환자 50명중 16명은 중등증, 25명은 중증, 9명은 최고중증 그룹으로 분류되었다. 우심실수축기압은 중증도가 높은 그룹에서 낮은 그룹에 비해 더 높게 나타났으나 폐고혈압에 해당하는 우심실수축기압이 35 mmHg이상인 환자에 있어사는 각 그룹간에 유의한 차이를 보이지 않았으며, 확장기말 우심실내부간격, 시각등급 또한 중증도와 유의한 차이를 보이지 안항ㅆ다. 1초간 노력성호기량이 감소함에 따라서는 우심실수축기압, 시각등급은 증가하였으며 우심실수축기압을 35mmHg 미만과 이상인 그룹으로, 시각등급을 정상과 확장이 있는 그룹으로 분류하여 비교한 결과에서는 유의한 상관관계를 나타냈다. 결론 폐기능이 감소할수록 페고혈압 및 폐성심으로의 진행이 증가하였으나 폐기능검사에서 중등도 이상의 그룹에서 유병률의 차이는 크지 않았다.