면진시스템용 U형 강재댐퍼의 형상 개발에 대한 해석적 연구

권순일,오상훈,이상호,Quan, Chun-Ri,Oh, Sang-Hoon,Lee, Sang-Ho 한국강구조학회 2010 韓國鋼構造學會 論文集 Vol.22 No.1

면진기술은 건축물의 구조적 피해를 줄이고 진동에 민감한 구조물의 내진성능을 향상시키는 가장 효과적인 방법 중의 하나이다. 하지만 면진구조시스템에서 지진에너지를 흡수하는 댐퍼의 재료로서 자주 사용되었던 납의 환경오염문제가 대두되면서, 최근에는 친환경 재료인 강재를 사용하는 경우가 증가하고 있다. 본 연구에서는 면진시스템용 에너지흡수장치인 U형 강재댐퍼를 대상으로 비선형 유한요소해석을 수행하고 SS400 강재와 고인성강재를 사용한 댐퍼의 해석결과를 비교하여 사용강재의 재료적 특성의 차이가 댐퍼의 변형능력에 미치는 영향을 분석하며, 고인성강재를 사용한 댐퍼의 형상비, 두께, 폭에 따른 변형능력을 파악한다. 또한 고인성강재를 사용한 U형 강재댐퍼의 응력분포를 분석하여 응력분포에서 나타내는 문제점을 개선하기 위한 대책으로 댐퍼의 일부 구간에 개구부를 둔 새로운 형상을 제시하고 형상에 따른 변형능력, 내력특성 및 응력분포를 고려하여 최적형상과 설계식을 제안하고자 한다. Seismic isolation is one of the most widely implemented and accepted seismic protection systems to limit or avoid damages from unforeseeable earthquakes. As an energy absorption device, however, the supplemental lead itself tends to pollute the environment. Consequently, it is predicted that the use of lead would be controlled. Considering the pollution caused by lead, several researchers are interested in the viability of using steel in place of lead. In this study, first, based on the results of a non-linear finite element analysis, the excellent deformation capacity of a very tough steel damper was demonstrated by comparing it with that of the SS400 damper and determining the effects of main parameters (the aspect ratio, thickness, and width) on the deformation capacity. Second, an optimum shape and design equation for a U-shaped damper with an opening based on stress distribution was suggested.

대학생 스트레스 영향 요인에 대한 연구 : S대 경영계열 학생을 중심으로

권순일 신라대학교 경제경영연구소 2009 경제경영연구 Vol.10 No.1

Nowadays, Stress is becoming an increasingly important concern both in student and in university. This is because of the tremendous results which are caused by it. Thus, the objective of this study is to make some contribution to reduce the stress of students. To accomplish this objective, after reviewing many literature about stress, we clarified the concept of stress and suggested the necessity of stress management examining aversive effect of it. At the same time, in addition to exploring five models relating stressor to stress symptom, we also illustrate stressors on which were commonly emphasized by the previous works on stressors of university student. Based upon the theoretical background, we analyzed the influential factors of stress symptom outcome through the empirical research. The main findings out of the analysis are as follows; First, it was indicated that the correlation of each stress-factor with others are, in some degree, statistically significant by directly or indirectly. Second, the regression analysis, using stress-factors and intervenient factors as predictors, showed that all the stress-factors except 'low academic record' and 'no participation', and the social support factor had influenced the stress outcome, namely stress symptom. but in the case of the personal factors such as A-personality, gender, age, grade, there were no significant influence on stress symptom. Finally, the moderated effects of intervenient factors were investigated through the ANOVA. it was indicated that both the social support factor and the personal factors somewhat functioned as moderators of relating between stressors and stress symptom outcomes. but the buffer effect of the moderators were turned out to be found, only in 12 of 55case.

UCC 음원분류를 위한 연주악기 분류에 대한 연구

권순일,박완주 한국정보처리학회 2010 정보처리학회논문지. 소프트웨어 및 데이터 공학 Vol.17 No.2

사용자가 직접 연주하여 제작한 콘텐츠에서 많이 사용되는 악기는 기타, 피아노, 그리고 바이올린 이다. 이중 기타와 피아노가 만들어 내는 오디오 신호의 특성이 비슷하여 구분하기가 어렵다. 하지만 시간에 따른 신호의 에너지 변화가 피크(Peak)들을 중심으로 서로 다른 패턴을 보이는 것으로 분석되었다. 누적 히스토그램을 이용하여 피크 존재 가능성의 확률적 분포를 구한 후, 피크를 중심으로 그 주변의 주파수 대역 별 에너지 변화 패턴을 통계적 방법으로 모델링하여 실험한 결과 피아노와 기타의 구분 성공률이 최고 14% 정도의 향상을 보였다. A guitar, a piano, and a violin are popular musical instruments for User Created Contents(UCC). However the patterns of audio signal generated by a guitar and a piano are too similar to differentiate. The difference between two musical instruments can be found by analyzing the frequency variation per each band near signal peaks. The distribution of probability on the existence of signal peaks based on Cumulative Histogram were applied to musical instrument recognition. Experiments with statistical models of the frequency variation per each band near signal peaks showed the 14% improvement of musical instrument recognition.

인구노령화와 생명보험 수요; 연령-세대-연도효과 분석

권순일 한국리스크관리학회 2011 리스크 管理硏究 Vol.22 No.2

인구노령화는 사회·경제적 변화를 유발하고 있으며 모든 산업의 주목을 끌고 있다. 특히 인구비중 변화가 수요에 큰 영향을 미칠 수 있는 보험산업의 경우 인구노령화에 더 많은 관심을 기울일 필요가 있다. 지금까지 국내 보험수요에 대한 연구는 단일 횡단면 자료를 이용하고 있으며, 이를 통해서는 노령층의 특성변화라는 질적 측면을 분석하는 데 한계가 있다. 본 연구는 주기적으로 실시되고 있는 설문조사 자료를 이용하여 보험수요의 세대간 차이를 분석하고 있다. 분석결과를 통해 생명보험 수요의 세대간 차이가 존재하며, 특히 건강(질병)보험의 경우 성장세를 지속할 수 있을 것이라는 결과를 제시하고 있다. The changing age distribution of the population has been affecting social and economic phenomena. Especially, the demand for life insurance can be influenced by the aging population more than other industries. Therefore it is necessary for insurer to pay more attention on the aging baby boom generation. - 157 - There are a lot of previous research results on the demand for life insurance. With a single cross sectional data, however, one cannot figure out decisively the difference in behavior between age classes. This study analyses cohort, age and period effects on the demand for life insurance using a series of cross-sectional surveys conducted by Korea Insurance Research Institute. The result reveals that cohort(age class) significantly influences on the demand for life insurance and health insurance would continue its growth trends for the near future.

VaR(Value-at-Risk) 모형을 이용한 화재보험 손해 위험도 측정

권순일,김무환 한국리스크관리학회 2019 리스크 管理硏究 Vol.30 No.1

This study applies VaR, which is a representative risk measurement indicator, to the given data and verifies which model is most suitable with insurance damage amount. We derive VaR for each of the models employed, perform backtesting, and compare the results. To do this, we sum up the given data on the daily basis and then analyze it and at the same time try to analyze it by the raw data. According to the results of the analysis, we did not find the clustering of volatility in aggregated daily data and it was proved that VaR estimates by extreme value theory (EVT) and historical simulation (HS) models are relatively preferred to the other models. On the other hand, in the case of the original data, the clustering of the volatility is found and the VaR is estimated after filtering by the GARCH model. As a result of the backtesting, the VaR estimate by the GARCH-EVT model proved to be the best model.

병렬처리 유전자 알고리즘을 적용한 저류층 특성 역산모델 개발 및 응용

권순일,김현태,허대기,김세준,이원석,성원모 한국자원공학회 2003 한국자원공학회지 Vol.40 No.5

This paper presents the development of a parallelized inverse model equipped with real-coded genetic algorithm, and its application for the characterization of a heterogeneous reservoir with integration of the core analysis data and multi-phase production data. By utilizing the developed model in this study, we performed the inverse calculation with the observed production data obtained from three-layered reservoir system in order to estimate porosity and permeability distributions. As a result, number of generations for the convergence was 43 and the fitness was 0.00107. From the calculated distributions of porosity and permeability, it was confirmed to be low permeability zone located at left-top and right-bottom side in the layer 1. In the case of layer 2 and 3, its zone is located at left and right-bottom side, respectively. According to the pressure matching results, the sum of the relative errors at producer 1 and producer 2 were 3.3% and 5.4%, respectively, that is, it was found that the pressures observed at well almost identical to those calculated by the developed model. Finally, from the estimated calculating efficiency of parallel process with three-nodes cluster, it shows that parallel process was 2.9 times as fast as serial one on an average. 본 연구에서는 코아분석자료와 다상 생산자료를 활용하여 공극률과 투과도 등의 저류층 특성을 규명하기 위해 3차원 저류 전산시뮬레이터와 실수코딩 유전자 알고리즘이 적용된 병렬처리 역산모델을 개발하였다. 개발된 모델을 3개의 층으로 구성된 불균질 저류층에 적용하여 다상 생산자료의 역산을 통해 공극률과 투과도 분포를 산출한 결과, 유전자 알고리즘은 43 세대만에 수렴하였으며 수렴 시 적합도는 0.00107로 양호한 것으로 나타났다. 산출된 최적 투과도 분포로부터 1번 층의 경우 좌측상부에서 우측하부에 걸쳐 저투과도 지역(LPZ)이 존재하고 2번과 3번 층의 경우 좌측과 우측하부에 각각 저투과도 지역이 존재하는 것이 확인되었다. 산출된 최적 공극률과 투과도 분포를 적용하여 저류 전산시뮬레이션을 통해 계산된 압력과 관측 압력을 비교한 결과, 생산정 1에서는 압력 상대오차의 합이 3.3%, 생산정 2는 5.4%로써 매우 양호한 일치를 보였다. 마지막으로, 3개의 노드로 구성된 클러스터에서 병렬처리 연산효율을 평가한 결과, 병렬처리 연산 시 일괄처리 연산에 비해 평균 2.9배 정도 연산시간이 단축됨을 알 수 있었다.

퍼스널모빌리티 시뮬레이터 주행환경 시나리오 구현을 위한 연구동향 분석 및 발전방향

권순일,김나연,송태진 대한교통학회 2020 대한교통학회 학술대회지 Vol.83 No.-

기내배양 사과 대목의 기외 삽목 시 발근과 순화에 미치는 배양조건 및 생장조절물질의 효과

권순일,김정희,강인규,김목종 한국식물생명공학회 2004 JOURNAL OF PLANT BIOTECHNOLOGY Vol.31 No.2

본 연구는 사과 왜성대목 M.9와 M.26 조직 배양묘를 통기성 마개와 비통기성 마개의 MS배지에서 생장 특성을 비교하기 위해 시험되었다. 또한 배양묘의 생육 변화와 이 배양묘를 발근촉진제 침지 처리 후 기외 삽목을 하여 발근 및 순화를 동시에 시키기 위해 실시하였다. 배양병내의 CO2와 에틸렌의 농도는 통기성 마개 배양병이 비통기성마개 배양병 보다 낮았다. 통기성 마개 배양병내의 온․습도 변화는 광조건에 따라 일정하게 반복되었다. 통기성 마개 배양묘의 기공은 외기에서 즉시 관찰 시 닫혀 있었으나 비통기성마개 배양묘의 기공은 외기에서 20분 후 관찰 시에도 열려 있었다. 통기성 마개 배양묘의 엽록체 지수와 잎 면적은 모두 비통기성 마개의 것 보다 높았다. 기외 삽목시 발근율은 M.9와 M.26 모두 300 mg/L IBA + 3% sucrose 침지 처리구에서 각각 86.5%와 85.4%로 가장 높았으며 순화율은 각각 71.7%와 70.0%로 가장 높았다. 통기성 마개 배양묘의 순화율은 비통기성마개 배양묘 보다 모든 침지 처리구에서 순화율이 비슷하거나 높았다. Growth of M.9 (Malus domestica Bork. cv) and M.26 (Malus domestica Bork. cv) of dwarf apple rootstock, cultured on MS agar medium in a vessel with ventilating stopper (VS) and then in vivo rooting and acclimatization under combined-treatment by some materials with IBA, were investigated. Concentration of CO2 and ethylene in the vessel with VS was lower then in the vessel with non-VS. Change of temperature and humidity in the vessel with VS was repeated by light condition. Stomatal pores of tissue in the vessel with VS were immediately closed after plantlets were exposed to room humidity but those in the vessel with non-VS were opened after 20 minutes exposure to room humidity. Leaf area and chloroplast index of tissue in the vessel with VS was higher then in the vessel with non-VS. In vivo rooting ratio and acclimatization ratio of M.9 and M.26 was highest in 300 mg/L IBA+3% sucrose dip-treatment among other combined- treatments.

초등학교 체육과 교육과정 변천에 관한 고찰

권순일 江原大學校附設 體育科學硏究所 1996 江原大學校附設體育科學硏究所論文集 Vol.- No.20

The purpose of this study was to develop change of the elementary physcal education curriculum by critically analyzing the models and current national curriculum. As the result of critique and analysis of the research gathered from a variety of source, an alternative curriculum for elementary, physical education was developed. The three aspects of the system for curriculum development, curriculum objectives, and curriculum content were analyged. This curriculum intergrated the advntages and solved the problems of the existion curriculum models and current national curriculum. The alternative curriculum developed in this study would provide an effective means for achieving not only the goals but also of elementary physical education

단백질 칩의 분자진단적인 응용 및 전망

권순일,도성탁 대구보건전문대학 2007 대구보건대학 論文集 Vol.27 No.-

A typical protein chip is defined as a piece of glass on which different protein molecules have been arrayed at separate locations in an ordered manner thus forming a microscopic array. Microarray technology is in the center of the tools for large scale and high throughput post-genomic research and diagnosis. Protein chip technology has shown its great potential in basic research, diagnostics and drug discovery. It has been applied to analyze antibody-antigen, protein-protein, protein-nucleic acid, protein-lipid and protein-small molecule interactions, as well as enzyme-substrate interactions. Various protein chip diagnostic kits were developed for the diagnosis of wide range of disease including cancers and SARS. In this review, the latest technologies of protein chip are discussed in various aspects with its application in molecular diagnosis. Protein chips may not only change current medical diagnostic practices like the introduction of point of care test products but also have a significant potential to improve human healthcare service in the future.