데이터 마이닝을 이용한 로버스트 설계 모형의 최적화

정혜진(Hey-Jin Jung),구본철(Bon-Cheol Koo) 한국산업경영시스템학회 2007 한국산업경영시스템학회지 Vol.30 No.2

  According to the automated manufacturing processes followed by the development of computer manufacturing technologies, products or quality characteristics produced on the processes have measured and recorded automatically. Much amount of data daily produced on the processes may not be efficiently analyzed by current statistical methodologies (i.e., statistical quality control and statistical process control methodologies) because of the dimensionality associated with many input and response variables. Although a number of statistical methods to handle this situation, there is room for improvement. In order to overcome this limitation, we integrated data mining and robust design approach in this research. We find efficiently the significant input variables that connected with the interesting response variables by using the data mining technique. And we find the optimum operating condition of process by using RSM and robust design approach.

VSI ${\overline{X}}$-CRL 합성관리도의 경제적 설계

송서일,박현규,정혜진,Song, Suh-Ill,Park, Hyun-Kyu,Jung, Hey-Jin 한국산업경영시스템학회 2005 한국산업경영시스템학회지 Vol.28 No.4

This paper is designed a VSI ${\overline{X}}$-CRL synthetic control chart in aspect of economy. We found the optimal sampling interval and various control limit factors under various cost parameters using cost function, proposed Lorenzen and Vance. Optimal design parameters include the sample size, control limit width, sampling interval, CRL/S chart control limit; L. Comparison and analysis of cost parameters are applied between synthetic VSI ${\overline{X}}$-CRL chart and FSI ${\overline{X}}$-CRL chart. The result of this paper shows that VSI ${\overline{X}}$-CRL chart brings cost-cutting effect of 3.04% control expense less than FSI control chart. It may not be difficult to establish the optimal economic control parameters to apply the practical cost parameters in the field.

공정개선 의사결정을 위한 VSI $\bar X$ 관리도의 경제적 설계

송서일,김재호,정혜진,Song, Suh-Ill,Kim, Jae-Ho,Jung, Hey-Jin 한국품질경영학회 2007 품질경영학회지 Vol.35 No.2

Today, the statistical process control (SPC) in manufacture environment is an important role at the process by the productivity improvement of the manufacturing systems. The control chart in this statistical method is widely used as an important statistical tool to find the assignable cause that provoke the change of the process parameters such as the mean of interest or standard deviation. But the traditional SPC don't grasp the change of process according to the points fallen the near control limits because of monitoring the variance of process such as the fixed sampling interval and the sample size and handle the cost of the aspect of these sample point. The control chart can be divided into the statistical and economic design. Generally, the economic design considers the cost that maintains the quality level of process. But it is necessary to consider the cost of the process improvement by the learning effects. This study does the economic design in the VSI $\bar X$ control chart and added the concept of loss function of Taguchi in the cost model. Also, we preyed that the VSI $\bar X$ control chart is better than the FSI $\bar X$ in terms of the economic aspects and proposed the standard of the process improvement using the VSI $\bar X$ control chart.

증예(症例) : 미만성 기관지 침범 증상으로 나타난 재발성 다발성 연골염 1예

김세인 ( Se In Kim ),정혜진 ( Hey Jin Jung ),장용범 ( Yong Bum Jang ),이규선 ( Ku Son Lee ),고은영 ( En Young Koh ),이상일 ( Sang Il Lee ) 전북대학교 의과학연구소 2003 全北醫大論文集 Vol.27 No.2

재발성 다발성 연골염은 연골조직을 침범하여 염증성 병변을 일으키는 원인 불명의 드물 전신 질환으로, 이개의 연골염이가장 흔하게 나타나는 선행증후이고, 다른 임상상으로 비연골염, 호흡기계의 연골렴과 관절염, 공막염등이 있으나 이개의 연골염이나 비연골염등 특징적 증상 없이 기도에 연골염의 형태로 발현하는 경우도 드물게 보고되어 있다. 저자들은 35세 여자 환자에서 다른 부위의 연골 침범에 의한 전형적인 증상 없이 미만성으로 기도 연골을 침범하여 발생한 재발성 다발성 연골염 1예를 경험하였기에 보고하는 바이다. Relapsing polychondritis is an uncommon disease manifested by episodes of progressive inflammation and destruction of cartilage. Characteristic features include auricular chondritis, arthritis, nasal chondritis, ocular inflammation, audiovestibular damage and respiratory tract inflammation. Major airway involvement occurs in more than 50% of the patient and is the greatest threat to life. We experienced a 35-year-old female patient with relapsing polychondritis involving diffuse airway and present here

데이터 마이닝과 통계적 기법을 통합한 최적화 기법

송서일 ( Suh Ill Song ),정혜진 ( Hey Jin Jung ),신상문 ( Sang Mun Shin ) 한국품질경영학회 2006 품질경영학회지 Vol.34 No.4

항만물류 서비스 품질 분석을 위한 DMQFD 모형의 개발

송서일(Suh-Ill Song),정혜진(Hey-Jin Jung),이보근(Bo-Geun Lee) 한국산업경영시스템학회 2007 한국산업경영시스템학회지 Vol.30 No.3

  This study define the concepts of port logistics service by investigating various elements of port logistics service and grouping them in six attributes using a Data Mining technique. The QFD (Quality Function Deployment) technique is applied to measure the quality of port logistics service, and those results are analyzed. The DMQFD (Quality Function Deployment using Data Mining) model proposed in this study is a model for analyzing of port logistics service quality which is produced by combining those two stages. Using the DMQFD model, the requirements of customer could understand more correctly and systematically, and it could be an alternative tool to accomplish a customer satisfaction.

위선종과 조기위암에서 내시경 점막절제술의 연구 -완전절제율에 영향을 미치는 인자와 점막 절제술 전후의 조직학적 차이-

고강훈 ( Kang Hun Koh ),정혜진 ( Hey Jin Jung ),김상욱 ( Sang Wook Kim ) 전북대학교 의과학연구소 2007 全北醫大論文集 Vol.31 No.1

Objectives: The endoscopic mucosal resection of gastric adenomas or early gastric cancers is now widely accepted as a useful radical treatment method. We studied that the rate of successful treatment by the endoscopic mucosal resection of gastric adenomas or early gastric cancers and the factors related to the rate of the complete resection. Methods: We analysed, retrospectively, 118 lesions in 114 patients diagnosed early gastric cancer or gastric adenoma at the Chonbuk National University Hospital from January, 2005 to June, 2006. Of the 118 lesions, there were 107 adenomas and 11 early gastric cancers. We tried to follow up the lesions of resection by the endoscopic biopsy later. Results: The lesions were diagnosed 107 adenomas, 6 early gastric cancers type IIa, 5 type IIb, and the rate of complete resection was 85%(91), 84%(5), 80%(4), each. The sites of the lesions were divided antrum, angle, body, pylorus and each 60 cases, 14 cases, 42 cases, 2cases was reported. The rate of complete resection for the site was each 83%(50), 85%(12), 81%(34), 100%(2). The size of the lesions was divided ≤10 mm, 11~15 mm, 16~20 mm, 21~25 mm, 26~30 mm, ≥31 mm and each 14 cases, 21 cases, 41 cases, 6 cases, 31 cases, 5 cases were reported. The rate of complete resection for the size was each 86%, 86%, 90%, 100%, 71%, 60%. Of the 14 cases which were diagnosed as high grade dysplastic adenoma, early gastric cancer was diagnosed in 4 cases after the biopsy by endoscopic mucosal resection. Conclusion : We concluded that the site, size and the other factors of the lesions were related to the rate of complete resection after endoscopic mucosal resection, and the abnormal gastric mucosal lesions should be diagnosed with the biopsy by endoscopic mucosal resection.

症例(증례) : 특발성 혈소판 감소성 자반증과 동반된 Takayasu 동맥염 1예

민경훈 ( Kyung Hoon Min ),임호영 ( Ho Young Yhim ),정혜진 ( Hey Jin Jeong ),이민희 ( Min Hee Lee ),김성국 ( Sung Kuk Kim ),이기훈 ( Ki Hoon Lee ),정수진 ( Su Jin Jung ),이가영 ( Ka Yeong Yi ),이선화 ( Sun Hwa Lee ),정치량 ( Chi Ry 전북대학교 의과학연구소 2004 全北醫大論文集 Vol.28 No.1

Takayasu 동맥염과 특발성 혈소판 감소성 자반증은 두 질환 모두 발병원인 및 병태생리에 있어 자가면역성이 중요한 역할을 한다고 할 수 있다. 본 저자들은 Takayasu 동맥염과 특발성 혈소판 감소성 자반증이 동반된 57세 남자 증례를 보고하는 바이다. 본 증례 남지는 1년전 특발성 혈소판 감소성 자반증을 전단받았다. 복통 및 혈변배설을 주소로 내원한 환자는 좌측 위팔동맥(Left brachial artery)의 맥박이 감소된 소견을 보였으며, 청진 소견상 복부 잡음(abdominal bruit) 소견 을 보였고, 흉복부 컴퓨터 단층 촬영 및 3차원 대동맥 혈관 재구성 컴퓨터 단층 촬영 소견 상 좌측 쇄골밑 동맥(left subclavian artery), 흉복부 대동맥(thoracoabdominal aorta), 복강 동맥(celiac trunck), 상 창자간막 동맥(superior mesenteric artery)의 다발성 혈관염 소견을 보여 Takayasu 동맥염에 합당한 소견을 보였다. 고용량 스테로이드 치료 후, 환자의 임상적 증상과 혈침속도가 호전되었다. Takayasu`s arteritis (TA), a chronic inflammatory arteriopathy of unknown etiology, lead to both stenotic and ectatic changes, particularly occlusion. The common sites of involvement are the aorta and its main branches, and pulmonary artery. A specific etiology for TA has not been found. Autoimmunity has been found to play an important role in TA, and association with various autoimmune disorders has been reported in selected cases. There is no case report that TA coexists with idiopathic thrombocytopenic purpura (ITP). We report a case of TA associated with ITP in a 57-year-old man. He suffered from ITP 1 years earlier. On admission, the patient presented with periumbilical abdominal pain. TA diagnosed on the basis of decreased pulsation of the left brachial artery, bruit over the abdominal aorta and multifocal vasculitis in the left subclavian artery, thoracoabdomianl aorta, celiac trunk and superior mesenteric artery on thoracoabdominal computerized tomography and 3-D aortic arch reconstruction computerized tomography. Following the high dose steroid therapy, his clinical symptoms improved and erythrocyte sedimentation rate decreased.

VSI X-CRL 합성관리도의 경제적 설계

송서일(Suh-Ill Song),박현규(Hyun-Kyu Park),정혜진(Hey-Jin Jung) 한국산업경영시스템학회 2005 한국산업경영시스템학회지 Vol.28 No.4

This paper is designed a VSI X-CRL synthetic control chart in aspect of economy. We found the optimal sampling interval and various control limit factors under various cost parameters using cost function, proposed Lorenzen and Vance. Optimal design parameters include the sample size, control limit width, sampling interval, CRL/S chart control limit; L. Comparison and analysis of cost parameters are applied between synthetic VSI X-CRL chart and FSI X-CRL chart. The result of this paper shows that VSI X-CRL chart brings cost-cutting effect of 3.04% control expense less than FSI control chart. It may not be difficult to establish the optimal economic control parameters to apply the practical cost parameters in the field.

공정개선 의사결정을 위한 VSI □ 관리도의 경제적 설계

송서일 ( Suh Ill Song ),김재호 ( Jae Ho Kim ),정혜진 ( Hey Jin Jung ) 한국품질경영학회 2007 품질경영학회지 Vol.35 No.2

Today, the statistical process control (SPC) in manufacture environment is an important role at the process by the productivity improvement of the manufacturing systems. The control chart in this statistical method is widely used as an important statistical tool to find the assignable cause that provoke the change of the process parameters such as the mean of interest or standard deviation. But the traditional SPC don`t grasp the change of process according to the points fallen the near control limits because of monitoring the variance of process such as the fixed sampling interval and the sample size and handle the cost of the aspect of these sample point. The control chart can be divided into the statistical and economic design. Generally, the economic design considers the cost that maintains the quality level of process. But it is necessary to consider the cost of the process improvement by the learning effects. This study does the economic design in the VSI X control chart and added the concept of loss function of Taguchi in the cost model. Also, we proved that the VSI X control chart is better than the FSI X in terms of the economic aspects and proposed the standard of the process improvement using the VSI X control chart.