Predictive Factors for Acute Urinary Retention After Transperineal Template-Guided Mapping Biopsy

Si Hyun Sung(성시현),Chung Un Lee(이충언),Jae Hoon Chung(정재훈),Wan Song(송완),Minyong Kang(강민용),Hyun Hwan Sung(성현환),Byong Chang Jeong(정병창),Seong Il Seo(서성일),Seong Soo Jeon(전성수),Hyun Moo Lee(이현무),Hwang Gyun Jeo 대한비뇨기종양학회 2021 대한비뇨기종양학회지 Vol.19 No.3

Purpose: We investigated the predictive factors for acute urinary retention (AUR) after transperineal template-guided mapping biopsy (TTMB). Materials and Methods: We retrospectively reviewed the records of 459 patients who had undergone TTMB between May 2017 and July 2020. Overall complications after TTMB were analyzed and categorized according to the Clavien-Dindo classification. Factors that were likely to affect AUR were analyzed using a logistic regression model. Results: Overall complications after TTMB were observed in 95 of the 459 patients (20.7%), of which AUR was the most commonly reported (17.4%, n=80), followed by hematuria (3.1%, n=14). Hematuria in one patient was categorized as Clavien-Dindo grade IIIa. All remaining complications were Clavien-Dindo grade I. In the multivariate regression model, age ≥65 (odds ratio, 2.44; 95% confidence interval [CI], 1.42–4.17; p=0.001), prostate volume ≥30 mL (odds ratio, 3.72; 95% CI, 1.19–11.62; p<0.02), and number of biopsy cores ≥30 (odds ratio, 2.89; 95% CI, 1.29–6.43; p=0.01) were identified as the predictors for AUR after TTMB. Conclusions: AUR is the most common complication after TTMB. Age ≥65 years, prostate volume ≥30 mL, and number of biopsy cores ≥30 were significant predictors of AUR following TTMB.

2006년 이후 발표된 가속수명시험 계획에 관한 문헌 연구

성시일(Si-Il Sung) 한국신뢰성학회 2015 신뢰성응용연구 Vol.15 No.2

Accelerated life tests are widely used to evaluate the product reliability within a resonable amount of time and cost. This article provides literature review about accelerated life test plans between 2006~2015. The literature on planning accelerated life tests are reviewed with respect to the test scenario, assumed accelerated model and estimation method and optimization criteria. Finally, recommendations for the future research are presented.

학술 & 특별구두세션 : B5. 국방기술품질원 특별세션: 국방품질1 ; B5.1 : 학술 & 특별구두세션 : B5. 국방기술품질원 특별세션: 국방품질1 ; B5.1 : 가속시험계획에 관한 문헌연구

성시일 ( Si Il Sung ) 한국품질경영학회 2015 한국품질경영학회 학술대회 Vol.2015 No.1

50주년 기념 리뷰 논문 : 품질경영학회 50주년 특별호: 신뢰성 분야 연구 리뷰

성시일 ( Si Il Sung ),김용수 ( Yong Soo Kim ),문병민 ( Byeong Min Mun ),배석주 ( Suk Joo Bae ) 한국품질경영학회 2016 품질경영학회지 Vol.44 No.1

Purpose: This paper reviews the papers on reliability issues which are published in the Journal of the Korean Society for Quality Management (KSQM) since 1965. The literature review is purposed to survey a variety of reliability issues for several categories Methods: We divide all of reliability issues into 9 categories: acceleration test, reliability estimation, system reliability, software reliability, reliability data collection and analysis method, lifetime distribution, maintenance and warranty strategy, reliability applications, and reliability applications to military area Results: Dividing all of papers on reliability published in KSQM for 50 years into 9 categories, we provide a chronological roadmap for individual categories, and summarize the contents and contributions of surveyed papers Conclusion: The review paper is expected to provide future direction to improve reliaiblity theories and applications in manufacturing and service industries

방위산업 품질경영 수준 조사를 위한 모형 개선 및 현황 파악

성시일 ( Sung Si Il ),김형근 ( Kim Hyeunggeun ),김종만 ( Kim Jongman ),김용수 ( Kim Yong Soo ),정규석 ( Chung Kyu Suk ),김성도 ( Kim Sung Do ),배석주 ( Bae Sukjoo ) 한국품질경영학회 2016 품질경영학회지 Vol.44 No.3

Purpose: This paper proposes to improve the existing survey model for the quality management level of the defense industry by analyzing current quality management level, and to suggest the best survey model. Methods: The survey model was improved by merging and refining the questionnaires developed in 2014 for the purpose of reducing the answering burden and misunderstanding for questionnaires. In addition, a detailed video manual for filling the questionnaires was developed. Results: An improved survey model is presented and the quality management of the domestic defense industry is analyzed to derive some long-term policies for improving the quality level of defense industry. Conclusion: The proposed survey model will be continuously adopted to investigate the quality management level of the defense industry and target to provide the basic data for establishing the new defense policies.

무기체계의 신뢰성 향상을 위한 법과 규정에 대한 고찰: 신뢰도 성장 모형을 기반으로

성시일(Si-Il Sung),윤효진(Hyo-Jun Yoon),임재학(Jae-Hak Lim) 한국신뢰성학회 2021 신뢰성응용연구 Vol.21 No.2

Purpose: To improve the reliabilities of weapons systems, we propose the implementation of the reliability growth model in the defense sector of South Korea. Methods: We investigate the current laws and regulations related to the reliabilities of weapons systems. Moreover, the advantages of the reliability growth model are explained, and some guidance is provided for embedding the reliability growth model in the defense sector of South Korea. Results: We propose implementation of the reliability growth model based on the current laws and regulations related to the reliabilities of weapons systems. Conclusion: To enhance the availability and reliabilities of weapons systems, we propose revised regulations/rules for embedding the reliability growth model in the defense sector of South Korea.

일반품질연구 : 국방표준 및 규격의 제,개정 우선순위 산출을 위한 모형 개발

성시일 ( Si Il Sung ),김형근 ( Hyeunggeun Kim ),김용수 ( Yong Soo Kim ),배석주 ( Sukjoo Bae ),김준수 ( Jun Su Kim ),김종만 ( Jong Man Kim ) 한국품질경영학회 2016 품질경영학회지 Vol.44 No.1

Purpose: This study developed a method of determining priorities for evaluating and revising defense standards. Methods: The proposed data integration and refinement methods are used to obtain component reliability information and to determine the frequency of component citation based on Pareto analysis. Based on the reliability information and the frequency of cited components, the target components for quality improvement can be determined and improved using various methods, such as engineering changes, special meetings, additional training, and revising the maintenance manual. Results: Based on the proposed process, we identified components that need to be improved in order to enhance the quality and reliability. Conclusion: Our process will improve the quality and reliability of weapon systems. The proposed process can be adopted for various weapon systems to enhance their quality and reliability, and to reduce military spending.

중국의 시장분할과 전자상거래의 역할

성시일 ( Si Il Sung ) 한중사회과학학회 2004 한중사회과학연구 Vol.4 No.-

Reasons for China`s domestic market division phenomena are first, decentralization of China`s economic vastness, second, change of financial policy, third, the old system of communication and conveyance, and fourth, different understandings of distribution. This study focuses on the reasons for China`s market division from the aspect of decentralization of policy, change of financial policy, and different understanding of distribution. It also researches the possibilities for development and the solutions for the division of the market through Electronic Commerce(e-commerce) overcoming physical restrictions. The reason for China`s market division which is decentralization of authority and the financial policy can be in a broader sense, be viewed as centralized administration, but this phenomena wont change the market environment dramatically. The development of e-commerce which is less influenced by physical restrictions has the possibility of easing the market division phenomena. Chinese government is making continuous efforts on its policies to raise e-commerce, and the possibilities for development are sufficient. Even though acquirement, contract, and settlement of business information via on-line should be done at the same time, they have chosen COD (cash on delivery) which is abnormal method. In addition, overcoming regional limits which is the characteristics of e-commerce has been showing regional tendency through in the inflation of e-commerce, and is not displaying its original characteristics. Even through insufficient reasons through its environment, China`s e-commerce market will be enlarged just as the many organizations are predicting, and China has the potential of overcoming its market division.

슈타켈버그 게임 기반 Anti-virus 백신 선택 모형

성시일(Si-il Sung),최인찬(In-Chan Choi) 한국정보보호학회 2009 정보보호학회논문지 Vol.19 No.1

이 연구는 웹기반 시스템의 운영자와 침해자의 전략과 관계된 정보보안문제를 다룬다. 슈타켈버그 게임상황을 이용하여, 백신 선택 문제의 게임이론적 모형을 제시한다. 이 모형에서 운영자는 잠재적 시스템 침해자에 대응하는 백신조합을 선택하고, 침해자는 운영자의 백신 조합에 가장 효율적으로 침입할 수 있는 방법을 선택한다. 제시된 모형은 운영자의 예산, 시스템 성능 등을 고려한 추가적 현실제약조건을 동시에 고려한다. 더불어, 가정을 적용해 수정된 현실 데이터를 이용하여 2가지 시나리오 분석을 제시한다. This paper deals with an information security problem that involves the strategies of both an attacker and an administrator of a web-based system. A game-theoretic model for the problem, based on an Stackelberg game environment, is presented. In the model, the administrator selects a set of anti-virus vaccines to cope with potential system attackers and the intruder chooses attacking modes that are most effective against the administrator's chosen set of vaccines. Moreover, the model considers a number of practical constraints, such as a budget limit on the vaccine purchase and a limit on the system performance. In addition, two different scenario analyses are provided, based on the results of the proposed model applied to a simulated pseudo-real-world data.

한국과 중국 대학생의 진로결정과 진로준비 요인 비교 분석

성시일 ( Sung Si-il ) 한중사회과학학회 2018 한중사회과학연구 Vol.16 No.3

自從韓國和中國的大學畢業生就業成爲一個社會問題以來, 已經開展了許多硏究. 在這兩個國家, 職業和職業決策因素, 工作壓力和就業率提高是典型的硏究領域. 本硏究旨在比較分析同處于就業難時代的韓中兩國大學生的出路選擇及出路准備上的異同. 出路選擇特点直接影響出路趨向, 出路准備上的特点可以反映出學生本身對出路的認識程度.通過硏究兩國大學生對“出路”的認識, 了解兩國的社會現象, 爲今后的相關硏究提供可靠的依据.硏究的組成和方法如下: 首先, 通過前面的硏究分析了兩國的硏究趨勢和內容, 確定了調査所需的項目. 其次, 我們將總結硏究人員爲韓國大學生和中國留學生進行的職業訪談, 確定調査所需的變量, 幷在統計分析后將其作爲分析的基本數据. 通過比較分析發現了如下不同之處. 第一, 中國大學生畢業后選擇出路的比率比韓國大學生高. 第二, 韓國大學生中學分績点和對專業的滿意度越高, 選擇出路的就越多. 但中國學生幷无此特点. 第三, 韓國學生的英語成績、現場實習、資格證等實際技能方面和專業成績比中國學生高, 而中國學生的海外硏究成績相對高一些. 第四, 越是英語成績高的韓國學生越難選擇出路, 但他們普遍認爲英語和資格證對出路的影響力非常大. 第五, 中國學生認爲在出路選擇上學分占重要地位, 但都不太重視出路准備. 通過硏究得出了以下結論. 第一, 在韓國, 認爲自己所在大學水平低的學生選擇出路的比率高, 這是因爲大學認識到出路選擇的重要性, 加强了相關敎育與指導. 第二, 爲提高韓國大學生們的出路選擇比率, 有必要探索專業與社會就業掛钩的方案, 幷爲實現專業爲就業提供服務而努力. 第三, 韓國學生的出路選擇比率比中國學生低, 但却認爲應該爲出路做好各種准備. 這種認識不僅給學生個人增加了負擔, 也給社會增加了費用支出等出現了負面效果. 應該根据專業以NCS爲基礎改編敎育過程, 積極反映社會需求, 盡量將少不必要的就業准備, 減輕學生與社會的經濟負擔. 第四, 從想雇傭中國大學畢業生的企業角度來看, 通過本硏究可以了解中國大學生的就業准備傾向, 爲選拔适當人才提供可靠的依据. A comparative analysis of the factors of employment orientation and preparation for employment of Korean and Chinese college students. The results can be seen through the differences. First, the results show that after graduating from college in China, the requirements for employment orientation are generally higher than those for Korean university students. Secondly, the higher the satisfaction of Korean university students for credits and majors, the higher the level of employment will be. Chinese university students will not. Third, Korean university students believe that the practice areas and credits, such as English scores, internships, and qualification certificates, and professional and professional courses have a positive impact on employment. Chinese college students believe that overseas training has a more positive effect on employment. Fourth, for Korean university students, from the perspective of the influence of English on the orientation of employment, the higher the English score, the lower the employment requirement. However, both Korean and Chinese college students believe that the qualification certificate has a positive effect on employment. Fifth, Chinese college students think that credits account for a very important part of the employment direction. Compared to Korean university students, the credits of Chinese college students are not valued in the preparation for employment.