신경회로망을 이용한 냉연강판 표면결함의 분류

송성진,오치환 조선대학교 생산기술연구소 1995 生産技術硏究 Vol.17 No.2

Steel industry customers demand consistently high quality steel strip surfaces. Automatic on-line surface inspection systems have been applied for monitoring as well as enhancing strip surface quality. One of the important issues in the application of this type of equipments is the performance of the on-line defect classifier. In this work probabilistic neural networks have shown very excellent performance as the most promissing classifiers for classification of surface defects on colled rolled strips.

원발성 조기 위 소세포암

송근영,강길,박정희,김경종,민영돈,박치영,임성철 朝鮮大學校 附設 醫學硏究所 2002 The Medical Journal of Chosun University Vol.27 No.2

Gastric small cell carcinoma(SCC) is defined as poorly-differentiated neuroendocrine tumor of the stomach, and their morphologic and biologic features arc similar to those of the lung. It is known that this tumor has poor prognosis even in early pathologic stage, It acounts for only 3% of all gastrointestinal SCC. that has been reported only 33 cases outside and 6 cases inside of the comitiy. Most of these reports are related to advanced gastric SCC. as pathologic stage IIIb or IV. This report describes a case of early gastric SCC. pathologic stage Ib.

유방암의 nm23 단백 발현 - 면역조직화학적 연구 -

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

혈액투석중인 만성신부전 환자에서 골대사 지표로써의 Osteocalcin치

송치운,이진홍,안미애,윤환중,윤상임,성기양,이강현,송민호,이강욱,신영태,김영건,노흥규 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2

Background : Serum osteocalcin is synthesized by osteoblast and has been shown to be sensitive indicator of bone turnover inpatients with various metabolic bone disease. In renal osteodystrophy, serum osteocalcin is elevated due to decreased renal clearance and elevated level of PTH. This study was done to evaluate the usefulness of serum osteocalcin as a marker of bone metabolism and the correlation with other biochemical markers of bone metabolism. Methods : We measured serum osteocalcin, calcium, phosphorus, ALP(alkaline phosphatase) and PTH(parathyroid hormone) in 37 patients with end stage renal disease on hemodialysis. Osteocalcin was determined by radioimmunoassay and PTH was determined by radioimmunometric assay. Results : 1) The mean level of serum osteocalcin in ESRD patients was 233.8± 218.2ng/ml which was significantly higher than that of controls(p<0.0001). 2) The mean level of serum PTH in ESRD patients was 40.5± 43.8pg/ml was significantly higher than that of controls(p<0.005). 3) There was a significant positive correlation between the level of serum PTH, ALP and the level of serum osteocalcin in ESRD patients. 4) By using multiple regression, PTH is most reliable factor that affect to elevated level of serum osteocalcin ( beta coefficient = 0.687, Sig T<0.05). Conclusion : Serum osteocalcin as a marker of bone metabolism in ESRD patients is more useful than other biochemical marker such as serum calcium, phosphorus, ALP and PTH is a most reliable factor that affect to elevated level of serum osteocalin.

웨이블렛 분석을 이용한 직물의 결함 발견과 검출

김성신,송치권 부산대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.59 No.-

현재 섬유산업에서 직물의 결함을 찾아내는 방법은 생산공정 후에 사람이 직접 눈으로 하고 있다. 온라인 검사의 장점은 제품의 결함의 발견과 함께 원인을 추론하여 피드백을 이용한 생선 조절 변수를 조절하여 품질을 향상시킬 수 있다. 본 논문은 비전을 이용하여 온라인으로 직물의 결함을 찾아내는 방법에 대해 소개한다. 본 논문에서 비전을 이용하여 온라인으로 직물의 결함을 찾아내는 하드웨어와 소프트웨어 부분으로 구성된 탐진 시스템을 제안한다. 하드웨어 부분은 CCD카메라, 프레임그래버와 조명설비를 사용하였고, 소프트웨어로는 2차원 이미지를 1차원 데이터의 흐름으로 줄이는 가로-세로 스캐닝 루틴 알고리즘을 사용했다. 또한, 결함의 추출을 위하여 웨이블렛 변환에 기초한 SNR(Signal to Noise Ratio)계산방법을 도입하였다. 여러 형태의 결함과 옷감에 대해 실험한 결과, 제안된 시스템이 효과적임을 알 수 있다. This paper introduces a vision-based on-line fabric inspection methodology of woven textile fabrics. Current procedure for determination of fabric defects in the textile industry is performed by human in the off-line stage. The advantage of the on-line inspection system is not only defect defection and identification. but also quality improvement by a feedback control loop to adjust set-points. The proposed inspection system consists of hardware and software components. The hardware components consist of CCD array cameras, a frame grabber and appropriate illumination. The software routines capitalize upon vertical and horizontal scanning algorithms characteristic of a particular defect. The signal to noise ratio (SNR) calculation base? on the results of the wavelet transform Is performed to measure any defeats. The defect declaration is carried out employing SNR and scanning methods. Test results from different types of defeat and different sty1e of fabric demonstrate the effectiveness of the proposed inspection system.

流域特性을 考慮한 流出 모델링에 관한 硏究

金治弘,安元植,韓成大,尹如松 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.1

This study have been carried out as a sector of the rainfall-runoff relationship research. First of all, the runoff research has the difficult problem due to non-linearity of hydrological phenomena. In this study, according to the method of runoff separation into components by Hino and Hasebe (1980) is applied. This theory considers sufficiently the physical mechanism of runoff process to separate into the groundwater, interflow, and surfaceflow, respectively. Then each component of runoff time series can be reduced to the linear subsystem, that is, ARMA model can be obtained in each subsystem. Actual flood hydrograph of the every two major gauging stations in the Han River basin, the Naktong River basin and the Kum River have been analyzed, and have taken out the characteristics of each river basin. Also the runoff model have obtained for these basins.

수압보증시험시의 음향방출에 의한 복합재 연소관의 파괴거동 예측

이상호,김호철,오치환,송성진,정현조,임수용 韓國非破壞檢査學會 1998 한국비파괴검사학회지 Vol.18 No.2

섬유강화 복합제 연고관은 복합재료의 사용, 필라멘트 와인딩 및 경화공정 등으로 인하여 제작 중 다양한 결함이 발생할 수 있으며, 또한 사용 도중에도 예기치 않은 손상을 받아 기계적 성질이 저하될 수 있다. 따라서 제작 완료된 연소관의 품질 보증을 위해 수압보증시험이 사용되고 있으나 이를 위해 가한 수압이 오히려 연소관에 예기치 않은 손상을 가하여 실제 사용시 그 성능을 저하시키는 요인으로 작용하는 경우도 있다. 이러한 문제를 해결하기 위해 본 연구에서는 수압보증시험시의 음향방축을 감지하여, 그 신호의 특성으로부터 복합제 연소관의 파손 거동을 예측하는 체계적인 기법의 개발을 시도하였다. 음향방출을 이용하여 연소관에 발생한 손상의 개략적 위치를 결정할 수 있었으며, 또한 파괴모드의 식별도 가능하였다. 다만, 시료의 부족으로 최종파열압력의 변화와 충격손상의 영향에 대한 신뢰성있는 분석은 불가능하였다. Prediction of failure behavior in filament-wound composite motor cases is one of the important issues for their reliable application. Acoustic emission during hydroproof testing of the cases is used to solve this problem. Based on the acoustic emission behavior, failure sites can be located successfully. The identification of failure modes is also possible using the distribution of acoustic emission amplitude. Due to the limitation in the number of samples, it is not possible to predict the final burst pressure of motor cases and the effect of impact damage on the final burst pressure.

절수에 의한 mongolian gerbil의 체중 변화에 관한 연구

이경열,송치원,김무강,조성환,류시윤,김상근,박배근 충남대학교 수의과대학 동물의과학연구소 1996 動物醫科學硏究誌 Vol.4 No.-

Recently, the mongolian gerbils have been used in neurology and the study of water metabolism because of their easy onset of epileptic seizure and typical resistance to water deprivation. The sebaceous glands which are under the control of the gonadal hrmones are differently developed from the other laboratory animals. However the physiological data on the changes of body weight following water deprivation in mongolian gerbils is not available until now. In order to investigate the effect of the water deprivation on the body weight, the animals were deprived of water for 15 days. The body weights were measured daily by the torsion balance. The mean, the standard deviation, the standard error and the coefficient of variance of the body weights were calculated. The correlation was examined. The potential regression equation was y = 61.5458 - 2.0533 * x + 0.0487 * x^2. The regression coefficient was 0.993. The results obtained were as follows : 1. The body weights of the mongolian gerbils were continuously decrased from the 1st day to the 15th day after the water deprivation. 2. The mean body weight on the water deprivation was 63.0±7.00g and that at the 15th day was 41.4 ± 5.42g. 3. The coefficients of the variance showed the highest (13.09) at the 15th day and the lowest (10.10) at the 10th day. the coefficients of the variance kept decreasing until the 10th day and thereafter gradually increased until the 15th day. 4. The changing rate of the body weight kept continuously decreasing from the 1st day to the 15th day showing the daily loss of 1.0 - 3.3%. 5.The deviations (M - QBW) between the measured values (m) and the theorical values (QBW) using the regression equation showed the highest (1.494) at the 1st day and the lowest (0.053) at the 13th day. 6. The sum of the devitions was 0.179 and that of the deviation square was 1.15. The sum of the deviation rates between the mesaured body weights and the theorical ones was 0.484. 7. The daily body weight loss showed the highest at the 1st day by 2.053g and the lowest at the 15th day by 0.591g. 8. The specific body weight changing rates which were the rate of the body weight changing velocity to the changed body weight were decreased from 0.033% at the 1st day to 0.014% at the 15th day.

프리셉터 경험이 간호업무수행과 직무만족에 미치는 영향 연구

류언나,송혜숙,장은희,서효신,추연화,김인선,나명주,지성애,박경숙 중앙대학교 간호과학연구소 2001 중앙간호논문집 Vol.5 No.2

The purpose of this study was to investigate how preceptor experience has an effect upon preceptor nurses. This study was so designed that it could compare the difference between clinical performance and Job satisfaction of preceptor nurses and those of nonpreceptor nurses. Study subjects were sampled out from those nurses who worked with two university hospitals where preceptor programs were implemented. The number of subjects totaled to 134, including 69 preceptor nurses and 70 nonpreceptor nurses. The score of preceptor nurses' clinical performance and job satisfaction revealed a higher value than that of nonpreceptor nurses. A similar result was also shown in the subdomains. However these difference were not statistically significant. Among all of the preceptor nurses, the highest number of preceptor experience was just one time. Except for five times in preceptor experience, the more the number of times of preceptor experience, the higher score in clinical performance. It was manifested that the number of preceptor experience was not related to job satisfaction. The score of preceptor nurses' clinica1 performance and job satisfaction revealed a higher value than that of nonpreceptor nurses. A similar result was also shown in the subdomains. However these difference were not statistically significant. The reward that preceptor nurses wished most was a reduction of the work load assigned to them. Currently preceptor nurses are only receiving a small quantity of financial reward related with their preceptor role. Most of preceptor nurses (96.8%) were not satisfied with their existing reward. Almost half of the preceptor nurses(43.5%) did not want to play a role as preceptor again. The reason why the scores of clinical performance and job satisfaction were low might be attributed to the inadequate preceptor training program and reward system. Appropriate knowledge and clinical skill are expected to enhance the level of preceptor nurses' clinical performance and appropriate internal and external reward to elevate the level of preceptor nurses' Job satisfaction. Therefore, it is needed for us to develop more effective preceptor education program, financial reward, support of colleague nurses and nursing managers, and adjust workload for the purpose of more effective preceptor programs.

신발 제조업에의 린 생산방식 도입

윤재홍,송한식,권치명,정문상 東亞大學校 經營問題硏究所 1994 經營論叢 Vol.15 No.-

This paper is concerned with a lean production system to improve the productivity of shoes manufacturing industries. For this purpose, this research first reviews the environmental characteristics of shoes manufacturing industries and invetigates the current problems of shoes production systems. Shoes manufacturing process roughly consists of three process lines shoes uppers line, shoes soles line, and assembling line of shoes uppers and soles. Two major problems in shoes production system are a large amount of work-in-process(WIP) inventories, and the low rate of matching shoes uppers and soles in an assemblying line. Most of shoes manufacturing companies have more than a 3-days WIP inventories in every process line to avoid the blocking the production. Particularly the assemblying line has 5-7days buffers of shoes uppers and soles to maximize the productivity of manufacturing final shoes, however, the matching rate of shoes uppers and soles in the assemblying line is about 50%. These problems are from a low efficiency in inventory control mainly due to (1) too many order specification of sizes, colours, types and different due dates, and (2) a large amount of WIP inventories. To reslove above mentioned problems, we sugggest a lean production system of pull-method for reduction of WIP inventories and improvement of matching rate of shoes uppers and soles in assemblying line. Compared to a push production system(current production system), a pull production system may have a number of adventages in controlling inventories and balanced match of the sole parts and uppers parts when it applied to shoes manufacturing process. As an alternative to control the pull production method, we design a Kaban for production and inventory control. Also we design the Kaban circulations model for the production lines and inventory stores, and a shoes manufacturing information system to incorporate the Kaban system. We expect that the effective adoption of the pull production system to shoes manufacturing system will show better results in improving the matching rate, and reducing the WIP inventories and production lead time. These effects may also give more flexible production planning and raw matiarial procurement planning. We finally consider this research would be helpful in designing the lean shoes production system