퍼지논리 제어기의 비선형성의 정량적 해석

이철희,서선학 江原大學校 産業技術硏究所 1996 産業技術硏究 Vol.16 No.-

In this paper,the nonlinear I/O characteristic of suzzy logic controller is analyzed by using cell concept. Sources of the conlinearity inafuzzy logic controller include thefuzzification, the fuzzy reasoning and the defuzzification. A closed form expression for the defuzzified output is derived in case of a fuzzy logic controller with two inputs, traingular memberships, MacVicar-Whelan type linguistic rules, and direct fuzzy reasoning. As a result, it is shown that fuzzy logic linguistic rules, an direct fuzzy reasoning. As a result, it is shown that fuzzy logic controller is a nonlinear controller. Also its nonlinearity is analyzed with respect to the conventional PID control and the sliding mode control.

유연구조 퍼지추론 및 비퍼지화

이철희,서선학,Yager, R. 강원대학교 정보통신연구소 1997 정보통신논문지 Vol.1 No.-

In this paper, we suggest a new approach having the flexibility to the problem of fuzzy inference and defuzzification. For fuzzy inference, we observe the fact that it consists of three parts; the determination of firing level of each rule, the determination of degree of coupling between antecedent and consequent of a rule, and the aggregation of all rules. So we soften the paradigm of Mamdani's fuzzy inference model by using S-OWA operators. Also, for defuzzification, we introduced a combinability function to help to more intelligently guide the difuzzification process. And then, we treat it as a kind of clustering problem and apply the basic idea used in the mountain clustering method. The proposed method includes Mamdani's fuzzy inference model and center of gravity method as a special case, and it has the flexibility.

다중모델기법을 이용한 비선형시스템의 퍼지모델링

이철희,하영기,서선학 江原大學校 産業技術硏究所 1997 産業技術硏究 Vol.17 No.-

In this paper, a new approach to modeling of nonlinear systems using fuzzy theory is presented. To express the various and complex behavior of nonlinear system, we combine multiple model method with hierachical prioritized structure, and the mountain clustering technique is used in partitioning of system. TSK rule structure is adopted to form the fuzzy rules, and Back propagation algorithm is used for learning parameters in consequent parts of the rules. Also we soften the paradigm of Mamdani's inference mechanism by using Yager's S-OWA operators. Computer simulations are performed to verify the effectiveness of the proposed method.

경기지역 노인요양병원 서비스 질평가 관련연구

이선희,김주형 한국의료QA학회 2006 한국의료질향상학회지 Vol.13 No.2

Purpose : The purpose of this study was to examine correlation between quality of hospital service and structural dimension(foundation classification, the size of institution, the number of doctor, nurse, nursing assistants, care helper), and to evaluate correlation between quality of hospital service and process dimension(hospital service) Method : This study is designed by measuring structural dimension and process dimension using questionnaire about institution valuables and hospital service made by Heath Insurance review agency The data were collected from 40 long term care hospitals from 6th April to 25th May, 2007. Result : First, when the foundation classification is public, the number of doctor per patient, and the number of nurse per patient is the highest. but is not significant statistically(p=0.07). Second, Mean score of hospital service to prevent pressure sore is 11.83 out of 15 and mean score of hospital service to treat pressure sore is 15.75 out of 20. The number of nursing per patient resulted in the gab of hospital service.Third, when the foundation classification is public, the incidence of pressure sore is the lowest. The number of nursing per patient resulted in the gab of hospital service but didn't make difference in the quality of hospital service among long term care hospitals. hospital service result in difference in incidence of pressure sore, but is not significant statistically. Conclusion : According to the result, the quality gab among long term care hospitals resulted from foundation classification and the size of institution. In case of long term care hospital, it suggests the more public institutions should be expanded than private and the size of long term care hospitals is an important factor. the more the number of nurse is, the more the hospital services are, but, substantially, services provided by nurse didn't affect the outcome of patient health. hospital services should be more improved to make change outcomes of patiens. Finally, To get quality assurance, proper manpower and appropriate payment of long term hospital should be guaranteed to improve nursing performance.

Comet Assay 를 이용한 제주 자생 녹조류 추출물의 세포내 DNA 손상 억제 활성 효과

안긴내,이승홍,차선희,고석천,전유진 제주대학교 방사능이용연구소 2006 방사선응용과학연구소논문집 Vol.20 No.-

Endoscopic Cryotherapy of Lung and Bronchial Tumors: A Systematic Review

( Seon Heui Lee ),( Won Jung Choi ),( Sook Whan Sung ),( Young Kyoon Kim ),( Chi Hong Kim ),( Jae Il Zo ),( Kwang Joo Park ) 대한내과학회 2011 The Korean Journal of Internal Medicine Vol.26 No.2

Background/Aims: We made a systematic review and evaluation of endoscopic cryotherapy of endobronchial tumors, investigating safety and efficacy. Methods: Qualified studies regarding endoscopic cryotherapy of lung tumors were systemically evaluated using available databases according to predefined criteria. Results: In total, 16 publications were included in the final assessment. A narrative synthesis was performed because a formal meta-analysis was not viable due to the lack of controlled studies and study heterogeneity. Overall success rates for significant recanalization of the obstruction were approximately 80%, although they varied, depending on disease status in the patient population. Complications from the procedure developed in 0-11.1% of cases, most of which were minor and controlled by conservative management. Although limited data were available on comprehensive functional assessment, some studies showed that respiratory symptoms, pulmonary function tests, and performance status were significantly improved. Conclusions: Endoscopic cryotherapy was found to be a safe and useful procedure in the management of endobronchial tumors although its efficacy and appropriate indications have yet to be determined in well-designed controlled studies. (Korean J Intern Med 2011;26:137-144 )

[P3-51] Preparation and Characterization of Fish Paste Using an Olive Flounder

Seon Heui Cha,Mi- Ran Jo,Jung-Suck Lee,Ji-Hyeok Lee,Ju-Young Ko,Jin-soo Kim,You-Jin Jeon 한국식품영양과학회 2008 한국식품영양과학회 학술대회발표집 Vol.2008 No.10

A Comparative Study of Nursing Necessity Tools used in Korea and Japan

Seon Heui Lee,Hanju Lee 한국자료분석학회 2022 Journal of the Korean Data Analysis Society Vol.24 No.6

Since 2016, the Korean government has been implementing an integrated nursing and care service system in which nurses and nursing assistants are fully responsible for all hospitalized patients. An appropriate level of nursing staff is necessary for the successful operation of the system. The purpose of this study was to increase the reliability and validity of the National Health Insurance-Nursing Necessity (NHI-NN) tool by comparing it with an analogous tool used in Japan. This was a descriptive methodological study. The study surveyed the nursing needs and nursing time provided for 1,646 patients from 40 wards of 26 hospitals over a 24-hour period. The reliability and validity of tools were measured using Pearson’s correlation, Cohen’s weighted kappa, and regression analysis. The correlation between the two tools was .889, which was found to have a high statistical correlation. The degree of concordance by patient classification group was also high. Both tools were useful in predicting the nursing time provided to patients. No instrument can accurately and fully measure a patient's nursing needs. Therefore, the continuous improvement of tools is needed for the timely projection of nursing resource requirements for the delivery of high-quality patient care.

진료지원인력의 국내외 현황과 발전방향

Seon-Heui Lee 대한외과학회 2022 대한외과학회 학술대회 초록집 Vol.2022 No.11

Robotic versus conventional laparoscopic surgery for rectal cancer

Seon Heui Lee,Sungwon Lim,Jin Hee Kim,Kil Yeon Lee 대한외과학회 2015 Annals of Surgical Treatment and Research(ASRT) Vol.89 No.4

Purpose: Robotic surgery (RS) overcomes the limitations of previous conventional laparoscopic surgery (CLS). Although meta-analyses have been published recently, our study evaluated the latest comparative surgical, urologic, and sexual results for rectal cancer and compares RS with CLS in patients with rectal cancer only. Methods: We searched three foreign databases (Ovid-MEDLINE, Ovid-Embase, and Cochrane Library) and five Korean databases (KoreaMed, KMbase, KISS, RISS, and KisTi) during July 2013. The Cochrane Risk of Bias and the Methodological Index for Non-Randomized were utilized to evaluate quality of study. Dichotomous variables were pooled using the risk ratio (RR), and continuous variables were pooled using the mean difference (MD). All meta-analyses were conducted with Review Manager, V. 5.3. Results: Seventeen studies involving 2,224 patients were included. RS was associated with a lower rate of intraoperative conversion than that of CLS (RR, 0.28; 95% confidence interval [CI], 0.15?0.54). Time to first flatus was short (MD, ?0.13; 95% CI, ?0.25 to ?0.01). Operating time was longer for RS than that for CLS (MD, 49.97; 95% CI, 20.43?79.52, I<SUP>2</SUP> = 97%). International Prostate Symptom Score scores at 3 months better RS than CLS (MD, ?2.90; 95% CI, ?5.31 to ?0.48, I<SUP>2</SUP> = 0%). International Index of Erectile Function scores showed better improvement at 3 months (MD, ?2.82; 95% CI, ?4.78 to ?0.87, I<SUP>2</SUP> = 37%) and 6 months (MD, ?2.15; 95% CI, ?4.08 to ?0.22, I<SUP>2</SUP> = 0%). Conclusion: RS appears to be an effective alternative to CLS with a lower conversion rate to open surgery, a shorter time to first flatus and better recovery in voiding and sexual function. RS could enhance postoperative recovery in patients with rectal cancer.