Field Implementation of Voltage Management System (VMS) into Jeju Power System in Korea

신정훈,남수철,송지영,이재걸,한상욱,고백경,안용호,김태균,이병준,백승묵 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.3

This paper presents the results of field tests on Voltage Management System (VMS) using hybrid voltage control, which utilizes coordinated controls of various reactive power resources such as generators, FACTS and switched shunt devices to regulate the pilot bus voltage in a voltage control area. It also includes the results of performance test on RTDS-based test bed in order to validate the VMS before installing it in Jeju power system. The main purpose of the system is adequately to regulate the reactive power reserve of key generators in a normal condition with coordination of discrete shunt devices such as condensers and reactors so that the reserves can avoid voltage collapse in emergency state in Jeju system. Field tests in the automatic mode of VMS operation are included in steady-states and transient states. Finally, by the successful operation of VMS in Jeju power system, the VMS is proved to effectively control system voltage profiles in steady-state condition, increase system MVAR reserves and improve system reliability for pre- and post-contingency.

신라 혜공왕대 정치적 추이와 천재지변의 성격

신정훈 한국동서사학회 2001 東西史學 Vol.8 No.-

연계적 공학해석 교육을 위한 워크플로우 기반 시뮬레이션 환경개발 및 활용 고찰

신정훈,김한기,채희승,전인호,이종숙 한국공학교육학회 2018 공학교육연구 Vol.21 No.6

The importance of software in the engineering field is increasing day by day, so the utilization and understanding of the simulation software in the engineering design stage has become the core competence of the engineer. This study presents a new software education method for multiple systems in the field of mechanical engineering using a workflow execution environment as a sub-module of a computational platform (called EDISON platform) that can incorporate in-house software tools developed by many simulation tool developers. It can execute not only individual software tools such as fluid flow, structure, optimal design, but also conduct connective executions of multiple software tools. Based on this simulation environment, a methodology was proposed that can be applied to convergence types of engineering educations. By properly using this methodology, it is expected that beginning engineers could encourage their specialties understanding the big pictures of the analysis processes.

국내 음주폐해예방정책에 대한 근거중심 문헌고찰 및 평가 : 절주 및 직접적 폐해 감소 효과를 중심으로

신정훈,김지선,정한나,강상구,장선애,노희경,정완교 알코올과 건강행동학회 2021 알코올과 건강행동연구 Vol.22 No.2

Objectives: This study conducts evidence-based evaluation of alcohol policy in Korea and proposes policy change based on the evaluation. Methods: This study selected 40 articles utilizing PRISMA guideline and classified them into five areas of SAFER (WHO, 2018), the WHO’s classification criteria of alcohol related policy. A modified GRADE frameworks were utilized for the evidence evaluation. Results: Research on the effectiveness of alcohol policy exhibits a skewed distribution, lacking research on alcohol availability restrictions, advertising and promotion restrictions, and taxes and pricing policies. As for evidence evaluation, research on college’s alcohol availability policy exhibits a relatively higher level of evidence, while research on other policies generally shows a low level of evidence. Conclusion: Findings in this study shows the need to expand alcohol availability restriction, tighten drink-driving countermeasures, enforce comprehensive restrictions on alcohol advertising and especially reform alcohol tax and price policies.

Effect of Platinum-Based Chemotherapy on PD-L1 Expression on Tumor Cells in Non-small Cell Lung Cancer

신정훈,정진행,김세현,이규상,서경진,이지윤,김지원,이정옥,김진원,김유정,이근욱,김지현,방수미,이종석 대한암학회 2019 Cancer Research and Treatment Vol.51 No.3

Purpose Programmed death-1 (PD-1)/PD-1 ligand (PD-L1) axis blockades have revolutionized the treatment of advanced non-small cell lung cancer (NSCLC). We assessed the effect of platinum- based chemotherapy on tumor PD-L1 expression and its clinical implications. Materials and Methods We used immunohistochemistry to retrospectively evaluate the percentage of tumor cells with membranous PD-L1 staining (tumor proportion score) in paired tumor specimens obtained before and after platinum-based neoadjuvant chemotherapy (NACT) in 86 patients with NSCLC. We analyzed the correlation between the change in PD-L1 tumor proportion score and clinicopathologic characteristics, response to NACT, and survival. Results The PD-L1 tumor proportion score increased in a significant proportion of patients with NSCLC after platinum-based NACT (Wilcoxon signed-rank test, p=0.002). That pattern was consistent across clinically defined subgroups except for patients with partial response to NACT. Tumors from 26 patients (30.2%) were PD-L1!negative before NACT but PD-L1-positive after NACT, whereas the reverse pattern occurred in six patients (7%) (McNemar’s test, p < 0.001). Increase in PD-L1 tumor proportion score was significantly associated with lack of response to NACT (Fisher exact test, p=0.015). There was a tendency, albeit not statistically significant, for patients with an increase in PD-L1 tumor proportion score to have shorter survival. Conclusion Tumor PD-L1 expression increased after platinum-based NACT in a significant proportion of patients with NSCLC. Increase in tumor PD-L1 expression may predict poor clinical outcome.

뉴스벤더 모델을 이용한 최적 대출금 한도 관리에 관한 연구

신정훈,황승준 한국산업경영시스템학회 2015 한국산업경영시스템학회지 Vol.38 No.3

In this study, granting the optimal loan limit on SME (Small and Medium Enterprise) loans of financial institutions was proposed using the traditional newsvendor model. This study was the first domestic case study that applied the newsvendor model that was mainly used to calculate the optimum order quantity under some uncertain demands to the calculation of the loan limit(debt ceiling) of institutions. The method presented in this study made it possible to calculate the loan limit (debt ceiling) to maximize the revenue of a financial institution using probability functions, applied the newsvendor model setting the order volume of merchandise goods as the loan product order volume of the financial institution, and proposed, through the analysis of empirical data, the availability of additional loan to the borrower and the reduction of the debt ceiling and a management method for the recovery of the borrower who could not generate profit. In addition, the profit based loan money management model presented in this study also demonstrated that it also contributed to some extent to the prediction of the bankruptcy of the borrowing SME (Small and Medium Enterprise), as well as the calculation of the loan limit based on profit, by deriving the result values that the borrowing SME (Small and Medium Enterprise) actually went through bankruptcy at later times once the model had generated a signal of loan recovery for them during the validation of empirical data. accordingly, The method presented in this study suggested a methodology to generated a signal of loan recovery to reduce the losses by the bankruptcy.

양계업 발전방안 - 미허가 축사 적법화 현황과 전망

신정훈,Sin, Jeong-Hun 대한양계협회 2018 월간 양계 Vol.50 No.5

산업사회, 대중문화, 도시에 대한 ‘현실과 발언’ 의 양가적 태도

신정훈 한국미술이론학회 2013 미술이론과 현장 Vol.16 No.-

新羅 瑞鳳冢의 銀盒 年代와 그 築造時期에 대한 신검토 -역사적 맥락과 관련하여-

신정훈 택민국학연구원 2014 국학연구론총 Vol.0 No.13

Main focus of this study is focusing on the carved two words, Younsu(延壽) and Sinmyo(辛卯), which could indicate the name of an era and chinese zodiac respectively and the study also focus on possible period of Seobong-chong(瑞鳳冢)'s construction time with the words. Younsu and Sinmyo was carved in the bowl with lid silver(銀盒). Younsu was not used the name of an era of China and Japan. and there are several opinions about Sinmyo. There are three different opinions on Sinmyo. King Namul(奈勿王) 36 years in Silla(新羅) and king Gogukyang(故國壤王) 8 years in Goguryo(高句麗) is a first possible assumption of this time frame and this could be in A. D. 391. King Nulji(訥祗王) 35 years in Silla, and King Jangsu(長壽王) 39 years in Goguryo is second opinion of actual time of Sinmyo. and this could be in A. D. 451. King Jijung(智證王) 12 years in Silla, King Moonja(文咨王) 20 years in Goguryo is the other opinion of Sinmyo. and this could be in A. D. 511. The first assumption, A. D. 391 was the same time of the king Gogukyang 8 years. At that time, Goguryo held the national Buddhist mass, established Guksa(國社) and repaired Jongmyo(宗廟) Through those facts, the bowl with lid silver, which was buried in Seobong-chong, could be used in the Buddhist mass or national sacrifice in this bout of Goguryo.. Therefore, Younsu as the name of an era could be used in King Gogugyang of Goguryo(高句麗). In those time of years, Silla was dependent on Goguryo. The assumption is based on the facts that King Namul of Silla had to send Sllsung(實聖) to Goguryo as a hostage and Goguryo intervened the accession of King silsung. Through the background of the times, Younsu was carved in the bowl with lid silver. which was buried in the period of King Namul or King silsung’s reign. The others two arguments of Sinmyo could belong to the year in A. D.451(King Nulji 35 years in Silla, King Jangsu 39 years in Goguryo) or in A. D. 551(King Jijung 12 years in Silla, King Moonja 20 years in Goguryo) could not be logical choices because of the hostility relationship between Silla and Goguryo. It assumes that Silla could not bury the bowl with lid silver of Goguryo as their valuable in their royal ancient tomb. 본 논문은 서봉총의 축조시기와 관련하여, 銀盒에 새겨진 延壽라는 연호와 辛卯라는 年 干支에 주목하고자 한다. 연수라는 연호는 중국, 일본에서 사용된 예가 없다. 신묘년에 관해서는, 1) 391년(新羅 奈勿尼師今 36年, 高句麗 故國壤王 8年). 2) 451년 (新羅 訥祗痲立干 35年, 高句麗 長壽王 39年). 3) 511년(新羅 智證王 12年, 高句麗 文咨王 20年)으로 보는 견해가 있다. 그런데 1)의 391년은 고구려 고국양왕 8년이었다. 이 때, 고구려는 국가적인 법회를 열었고, 國社(社稷)를 세우고, 宗廟를 수리했다. 이로 보아, 서봉총에 매납된 은합은 고구려의 법회 또는 제사와 관련된 용도로 쓰였을 것이다. 따라서 연수라는 연호는 신묘라는 간지와 연관해 보면, 고구려 고국양왕의 것으로 생각된다. 이 때 고구려는 신라에 대해, 상위국으로 있었다. 이 점은 내물왕대에 신라가 고구려에게 인질을 보낸 것에서 알 수 있다. 또한 내물왕의 뒤를 이은 실성왕의 즉위에는 고구려세력이 개입되어 있었다. 이러한 시대적 배경으로, 신라 내물왕과 실성왕 무렵에 고구려의 연호인 연수가 새겨진 은합이 서봉총에 매납 되었다고 보인다. 그리고 은합에 새겨진 신묘 년이 2) 451년 (신라 눌지마립간 35년, 고구려 장수왕 39년)과 3) 511년(신라 지증왕 12년, 고구려 문자왕 20년)이라는 설은 고구려와 신라의 관계로 보아 합리적이지 않다. 왜냐하면 이 때, 고구려와 신라는 적대적인 관계로 변화되어 있었기 때문이다. 이 시기에, 신라는 왕릉급 무덤인 서봉총에 고구려의 연호가 새겨진 은합을 귀중한 유물로 여겨 매납하지는 않았을 것이다.

고농도 질소를 함유한 음식물 쓰레기 소화 탈리액의 처리를 위한 AGS (Aerobic Granular Sludge) 공정 적용

신정훈,이형기,모우종 대한환경공학회 2018 대한환경공학회 학술발표논문집 Vol.2018 No.11