중고제품의 보증과 보전정책에 대한 최근 연구 동향

임재학(Jae-Hak Lim) 한국신뢰성학회 2017 신뢰성응용연구 Vol.17 No.2

Purpose: The purpose of this research is to study research trend in the field of warranty and maintenance policy of second-hand products. Methods: To this end, we consider research articles, which deal with warranty and maintenance of the second-hand products, published on journals during the past 20 years and classify them by taxonomy scheme proposed by Shafiee and Chukova (2013). The taxonomy scheme consists of three maintenance models in warranty for second-hand product. In each models, we analyze proposed maintenance and warranty policies with respect to types of upgrade models, types of preventive maintenances, decision variables and decision criteria model. Results: We obtain the scheme of maintenance and warranty of the second-hand products and define cost related to warranty and maintenance of the second-hand item. Also, we summarize the characteristics of maintenance and warranty policies in each classified model. Conclusion: There have been several research reviews on maintenance and warranty polity of new products. This research surveys researches of authors during the past 20 years and classifies, summarizes and compares proposed maintenance and warranty policies of the second-hand products. This research provides useful information to researchers who are interested in maintenance and warranty of the second-hand products.

북한의 사회통제력과 산림황폐화

임재학(Lim, Jae-Hak) 경북대학교 사회과학연구원 2011 사회과학 담론과 정책 Vol.4 No.1

북한의 사회통제력과 산림황폐화 사이에는 어떠한 상관관계가 있는가? 이에 대해 네 가지 문제제기가 가능하다. 첫째, 북한의 사회통제력이 제대로 작동하고 있는 동안에는 북한의 산림이 황폐화되지 않았는가? 둘째, 북한의 사회통제력이 제대로 작동하고 있는 동안에도 북한의 산림이 황폐화하기 시작했는가? 셋째, 북한체제의 사회통제력이 약화되면서 북한의 산림이 훼손되었는가? 넷째, 북한의 사회통제력이 약화된 상황에서도 북한의 산림이 회복된 적이 있었는가? 본 연구는 이 네 가지 문제제기를 바탕으로 북한의 산림황폐화와 사회통제력의 상관관계를 분석하였으며 그 결과는 다음과 같다. 첫째, 해방 이후부터 1960년대까지 북한의 사회통제력 수준이 높았던 시기였고, 자력갱생 경제정책을 추진하는 데 주민을 총동원할 수 있었기 때문에 북한의 산림정책도 성공을 거둘 수 있었다. 둘째, 1970∼80년대는 1972년 헌법에 주체사상이 지도이념으로 등장하면서 사회통제가 이전의 수준보다 강화된 시기이다. 그러나 경제난과 식량난이 대두하며, 북한은 산림을 훼손하면서까지 식량난을 해결하기 위해 힘쓴다. 셋째, 동구 사회주의권이 해체되고 북한의 경제난과 식량난이 심화되면서, 북한의 사회통제력이 약화되고, 사회적 일탈현상이 일어난다. 이러한 상황에서 북한의 산림은 관리 불가능의 상태에 놓인다. 넷째, 북한은 사회통제력을 회복하기 위해 ‘선군정치’를 통해 군(軍)이 사회통제의 주축세력으로 등장한다. 또한 2000년부터 산림조성사업을 적극 추진하고, 2007년 ‘7.1조치’를 통해 경제개혁정책을 추진한다. 그러나 최근의 지표에 의하면 북한의 산림은 이전에 비해 더 황폐화 된 것으로 보인다. Is there any correlation between social control and forest devastation in North Korea? Four hypotheses can be set for this question. First, did North Korea have dense forests while social control was working properly? Second, did deforestation begin in North Korea while social control was working properly? Third, did damage of forests increase as North Korea began to lose social control? Fourth, is there any indication of reforestation while North Korea has had weak social control? Based on these four hypotheses, this study analyzes the correlation between social control and forest devastation in North Korea. The correlations can be described over four policy periods in North Korea. First, the level of social control was high from the liberation to the 1960s in North Korea. During this period, it was possible to mobilize the people for the promotion of self-reliance economic policy, and North Korea was successful in its forest policy. Second, during the 1970s and 80s, the Juche Idea emerged, starting as a guideline in the 1972 Constitution, and the level of social control increased compared to the previous period. However, North Korea chose forest clearing to solve economic difficulties and food shortages. Third, the collapse of socialism in Eastern Europe and the deepening of economic difficulties and food shortages have led to weakened social control in North Korea. Since these developments, forests have been left out of control. Fourth, the military emerged as a key force for social control through the military-first policy from the late 1990s. Thereafter, North Korea drove through economic reforms and a forest restoration program. However, the recent indicators show the forest to be more devastated than in the past.

Doppler velocimetry abnormality in preeclampsia, related to severity & gestational weeks at examination

임재학 ( Jae Hak Lim ),( Seung Chul Lim ),( Jin Dong Jeon ),( Young Han Kim ),( Yong Won Park ) 대한산부인과학회 2006 대한산부인과학회 학술대회 Vol.92 No.-

Clinical application of integrated [18F] fluorodeoxyglucose positron emission tomography & computed tomography in the diagnosis of ovarian tumor on the basis of ultrasonographic findings

임재학 ( Jae Hak Lim ),( Han Sung Hwang ),( Young Tae Kim ),( Sung Hoon Kim ),( Sang Wun Kim ),( Young Han Kim ),( Yong Won Park ) 대한산부인과학회 2006 대한산부인과학회 학술대회 Vol.92 No.-

정규분포와 대수정규분포에서의 고장률 보증시험 샘플링 계획

임재학(Jae-Hak Lim),김준홍(Jun Hong Kim),윤원영(Won Yong Yun),이종문(Jong Moon Lee) 한국신뢰성학회 2004 신뢰성응용연구 Vol.4 No.1

Ce/Zr 비율에 따른 역수성가스전이(reverse water-gas shift) 반응용 촉매 연구

임재학 ( Jae-hak Lim ),윤은수 ( Eun-su Yoon ),심재오 ( Jae-oh Shim ) 한국폐기물자원순환학회 2024 추계학술연구발표회 Vol.2024 No.0

The Estimation of the Coverage Probability in a Redundant System with a Control Module

Jae-Hak Lim(임재학) 한국산업정보학회 2007 한국산업정보학회논문지 Vol.12 No.1

한국 여성 자궁경부 종양에서의 항산화체계 및 산화적 스트레스

김재욱(Jae Wook Kim),최은경(Eun Kyoung Choi),임재학(Jae Hak Lim),김영태(Young Tae Kim),김동규(Dong Kyu Kim),이양자(Yang Cha Lee),김수연(Soo Yeon Kim),정혜연(Hae Yeon Chung) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.1

Objectives : The purpose of this study was to compare the plasma levels of antioxidant system and oxidative stress of cervical neoplasia patients to normal control, and to investigate the relationship between the plasma antioxidant system and various clinicopathological factors of cervical cancer. Patients and Methods : A cross-sectional sample of 90 cervical neoplasia patients and 90 normal control group was recruited from Nov. 2000 to Jan. 2001 at Yonsei University Medical Center. As the parameter of lipid peroxidation, plasma concentrations of malondialdehyde (MDA) was spectrophotomerically measured. Plasma levels of antioxidant vitamins were analyzed by reverse-phase high pressure liquid chromatography (HPLC), and glutathione peroxidase (GSH-Px) activity was measured by coupled enzyme procedure. The correlation between the results and various clinicopathological factors of cervical cancer were evaluated. Results : In women with cervical neoplasia, the activity of GSH-Px and plasma levels of antioxidant vitamins such as lutein, β-carotene, lycopene and zeaxanthin were significantly lower compared to normal control, while the concentration of MDA was significantly higher. However, between CIN and cervical cancer, only the levels of α-tocopherol and MDA showed significant differences. The changes in plasma antioxidant system showed no significant correlation with the prognostic factors of cervical cancer. Conclusions : These findings suggest a potential role of oxidative stress-induced lipid peroxidation and the impairment of antioxidant system in the pathogenesis of cervical neoplasia. However, these changes failed to define a causal relationship between the antioxidant system and disease outcome, or to show a significant correlation between several antioxidant parameters and the prognostic factors of cervical cancer.

최종사용자 관점의 ERP 시스템 성공모형에 관한 연구

이재오(Jae-O Lee),임재학(Jae-Hak Lim),정철호(Chul-Ho Jung) 한국산업정보학회 2008 한국산업정보학회논문지 Vol.13 No.4

본 연구의 주목적온 K공사에서 도입zzft66t활용하고 있는 ERP 시스템을 대상으로 최종사용자 관점 에서 구현 성과에 영향을 미치는 요인을 분석해 보는 것이다. 이러한 연구목적을 달성하기 위하여 본 연구에서는 정보시스템성공모델 관련 선행문헌에 대한 종합적인 검토를 통해 연구모형과 가설을 수립하였다. K공사의 ERP 시스템 사용자 276명을 대상으로 한 설문조사 결과를 이용하여 공분산구조모델 분석을 통한 성과모형 분석을 수행하였다. 성과모형에 대한 분석결과를 요약해 보면 다음과 같다. 첫째, ERP 시스템의 정보품질, 시스템품질, 서비스품질이 시스템 활용도에 미치는 영향관계에 관한 분석결과, 시스템품질이 시스템 활용도에 긍정적인 영향을 미치는 것으로 나타난 반면 정보품질과 서비스품질은 별다른 영향을 미치지 못하는 것으로 밝혀졌다. 둘째, ERP 시스템의 정보품질, 시스템품질, 서비스품질이 사용자 만족도에 미치는 영향관계에 관한 분석결과, 정보품질, 시스템품질, 서비스품질 등 세가지 모두가 사용자 만족도에 긍정적인 영향을 미치는 것으로 나타났다. 마지막으로 성과요인 간의 영향관계 분석결과, 시스템 활용도 및 사용자 만족도는 사용자 성과에 긍정적인 영향을 미치는 것으로 밝혀졌다. 분석결과를 토대로 본 연구에서는 연구의 시사점과 한계점 및 향후 연구방향에 대하여 논하였다. The primary objective of his study is to investigate the factors influencing the implementation performance of K public corporation’s ERP system from end user perspective. For this purpose, a research model and hypotheses are developed based on the literature reviews of IS Success Models. Data has been collected from 276 users who have used ERP system in K public corporation and the research hypotheses were tested using covariance structure model analysis. The hypotheses test results of this study are summarized as follows. Firstly, system quality has a positive influence on system usage, but information quality and service quality do not have significant influence on system usage. Secondly, all of three quality factors which are information quality, system quality, and service quality, have positive influence on user satisfaction. Lastly, both of system usage and user satisfaction have positive influence on user performance. From the analyses, this research ends with implications, as well as limitations and future research directions.

자궁경부임신에서 methotrexate치료법의 실패에 대한 예측 인자

이재성(Jae Sung Lee),권자영(Ja Young Gwon),안은희(Eun Hee An),임재학(Jae Hak Lim),장진범(Jin Bum Jang),김정연(Jung Yeon Kim),배상욱(Sang Wook Bae),이경주(Gyung Joo Lee) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.1

Objective : The use of methotrexate for the treatment of cervical pregnancy is now common practice. Our study was performed to determine the risk factors when the primary methotrexate treatment of cervical pregnancy was failed. Methods : From January 1985 to December 1999, we studied 32 women with cervical pregnancies who were treated with methotrexate intramuscularly according to a repeated intramuscular injections protocol. For evaluation of the efficacy of therapy, pretreatment serum concentrations of human chorionic gonadotropin, the size of the gestational mass, fetal cardiac activity, and the presence of fluid in the peritoneal cavity were measured. This findings were analyzed and compared by means of the chi-square test, Fisher exact test, and student's t-test between the success and failure. Results : There was no relation between the women's age, parity, the size of the conceptus, or the presence of fluid in the peritoneal cavity and the efficacy of treatment. A cervical pregnancy that presented with a serum human chorionic gonadotropin concentration of ≥ 10,000mIU/ml, fetal cardiac activity was considered to be associated with a higher failure rate of primary methotrexate treatment. Conclusion : Among cervical pregnancies, a high serum human chorionic gonadotropin concentration and fetal cardiac activity were the important factors associated with failure of treatment with methotrexate.