B/L의 約款에 對하여

劉秀烈 成均館大學校 商學會 1960 成均商學 Vol.1 No.1

한류의 화두는 스토리텔링(Story-Telling)이다

유수열 한국엔터테인먼트산업학회 2009 한국엔터테인먼트산업학회지 Vol.1 No.-

저소득층 중․장년 1인 가구의 사회적 관계 만족도가 주관적 행복감에 미치는 영향: 우울감의 매개효과 및 성별 차이를 중심으로

유수열,조옥선 대한산업경영학회 2023 산업융합연구 Vol.21 No.9

본 연구는 저소득층 중‧장년 1인 가구의 사회적 관계 만족도가 주관적 행복감에 미치는 영향을 살펴보고 우울감의매개효과와 성별의 조절효과를 검증하여 관련 정책과 프로그램 개발에 기초자료를 제공하는 것을 목적으로 수행되었다. 조사대상자는 한국복지패널 17차 데이터에서 저소득층 중장년 1인가구 482명을 추출하였다. 분석방법은 SPSS WIN 25.0 프로그램을 통해 빈도분석, 기술통계분석, 상관분석 및 PROCESS MACRO Model Number 1과 4를 활용하여 조절효과 및 매개효과를 검증하였다. 연구결과, 첫째, 사회적 관계 만족도는 주관적 행복감에 정적인 영향을 미치는 것으로 나타났다. 둘째, 사회적 관계 만족도와 주관적 행복감과의 관계에서 우울감이 부분 매개하였다. 셋째, 사회적 관계 만족도와 행복감의 관계에서성별에 따라 차이를 보였다. 본 연구를 통해 저소득층 중‧장년 1인 가구의 주관적 행복감 갖는 의미를 파악하고 정책적 지원방안의 기초자료로 활용될 수 있도록 실천적 함의를 제시하였다는 점에서 의의를 갖는다. The purpose of this study was to examine the effect of social relations satisfaction of low-income middle-aged and elderly single-person households on individual subjective happiness and to verify the mediating effect of depression and gender control to provide basic data for the development of related policies and programs. The SPSS WIN 25.0 program used frequency analysis, technical statistics analysis, correlation analysis, and PROCESS MACRO Model Number 4 to verify the mediating effect of 482 middle-aged singleperson households extracted using the “17th Korea Welfare Panel in 2022” survey data. In addition, the control effect was verified using PROCESS MACRO Model Number 1. The results of the study first showed that social relationship satisfaction after controlling demographic characteristics had a positive effect on subjective happiness. Second, it was found that depression had a partial mediating effect in the relationship between social relationship satisfaction and subjective happiness. Third, it was found that the higher the satisfaction level of social relationships among women than men, the greater the sense of happiness. Through this study, it is meaningful in that it identified the meaning of social relationships of middle-aged and elderly single-person households and presented practical implications so that they can be used as basic data for policy support measures.

수열합성법으로 제조된 나노막대 구조 WO₃의 광촉매 효과 및 염료 흡착 반응

유수열,남충희,Yu, Su-Yeol,Nam, Chunghee 한국분말야금학회 2017 한국분말재료학회지 (KPMI) Vol.24 No.6

Transition-metal oxide semiconductors have various band gaps. Therefore, many studies have been conducted in various application fields. Among these, methods for the adsorption of organic dyes and utilization of photocatalytic properties have been developed using various metal oxides. In this study, the adsorption and photocatalytic effects of $WO_3$ nanomaterials prepared by hydrothermal synthesis are investigated, with citric acid added in the hydrothermal process as a structure-directing agent. The nanostructures of $WO_3$ are studied using transmission electron microscopy and scanning electron microscopy images. The crystal structure is investigated using X-ray diffraction patterns, and the changes in the dye concentrations adsorbed on $WO_3$ nanorods are measured with a UV-visible absorption spectrophotometer based on Beer-Lambert's law. The methylene blue (MB) dye solution is subjected to acid or base conditions to monitor the change in the maximum adsorption amount in relation to the pH. The maximum adsorption capacity is observed at pH 3. In addition to the dye adsorption, UV irradiation is carried out to investigate the decomposition of the MB dye as a result of photocatalytic effects. Significant photocatalytic properties are observed and compared with the adsorption effects for dye removal.

볼밀을 이용한 TiO₂/WO₃ 복합체 제조 및 광촉매 특성

유수열,남충희,Yu, Su-Yeol,Nam, Chunghee 한국분말야금학회 2018 한국분말재료학회지 (KPMI) Vol.25 No.4

Composites of P25 $TiO_2$ and hexagonal $WO_3$ nanorods are synthesized through ball-milling in order to study photocatalytic properties. Various composites of $TiO_2/WO_3$ are prepared by controlling the weight percentages (wt%) of $WO_3$, in the range of 1-30 wt%, and milling time to investigate the effects of the composition ratio on the photocatalytic properties. Scanning electron microscopy, x-ray diffraction, and transmission electron microscopy are performed to characterize the structure, shape and size of the synthesized composites of $TiO_2/WO_3$. Methylene blue is used as a test dye to analyze the photocatalytic properties of the synthesized composite material. The photocatalytic activity shows that the decomposition efficiency of the dye due to the photocatalytic effect is the highest in the $TiO_2/WO_3$ (3 wt%) composite, and the catalytic efficiency decreases sharply when the amount of $WO_3$ is further increased. As the amount of $WO_3$ added increases, dye-removal by adsorption occurs during centrifugation, instead of the decomposition of dyes by photocatalysts. Finally, $TiO_2/WO_3$ (3 wt%) composites are synthesized with various milling times. Experimental results show that the milling time has the best catalytic efficiency at 30 min, after which it gradually decreases. There is no significant change after 1 hour.

1차 확률우위와 보험수요 모형

유수열 ( Su Yeol Ryu ),김일태 ( Il Tae Kim ),윤성민 ( Seong Min Yoon ) 한국금융공학회 2012 금융공학연구 Vol.11 No.4

본 논문은 의사결정자를 위험기피자로 가정했을 때 1차 확률우위에 변화에 제약 을 부과함으로써 얻은 부분집합인 새로운 확률밀도함수의 변화를 보험수요 모형에 적용하였다. 본 논문은 위험기피자들이 Left-side relatively weak first-degree stochastic dominance shift를 포함하는 1차 확률우위의 부분집합들에 대해서 더 많 은 배상이 포함된 보험을 사고 있다는 사실을 보여주고 있다. 이러한 일반적인 비교 정태분석결과는 불확실성 하에서 선형 보수모형을 가진 경쟁기업모형이나 포트폴리 오 모형에서도 적용될 수 있다. This paper applies the subsets of the change in first-degree stochastic dominance (FSD) shifts to the insurance model for the risk-averse agent. An individual faced with the change in the distribution of the random damage will demand more insurance to protect his initial wealth. This widespread belief depends on the preference of the decision-maker and the restrictions on the change in the cumulative distribution functions (CDFs) or the probability density functions (PDs). This paper shows that the risk-averse decision makers buy a greater insurance coverage for the subset of FSD shifts including a left-side relatively weak first-degree stochastic dominance shift. This general comparative static statement can be also investigated in other problems such as the standard portfolio model or the competitive firm model under uncertainty which has a linear payoff.

연속주조공정에서의 EMBR의 수치해석

김현경,유흥선,유수열 대한설비공학회 1999 설비공학 논문집 Vol.11 No.6

A numerical analysis has been performed solidification problem using the fixed grid-enthalpy method with enthalpy-porosity relation. A modified standard $k-\varepsilon$ model was applied to describe the influence of turbulent flow. Computational procedures are based on the finite volume method and the non-staggered grid system. Comparisons with the different three experimental results show that applying a modified standard $k-\varepsilon$model in mushyzone is better than the previous computation results. This paper includes another EMBR's influences such as change of velocity field, Increasement of temperature and dispersion of flow out of nozzle into the flow field. These EMBR's influences are compared to case without EMBR.

LSI Multi Parallel Test Handler 수율 향상을 위한 New Concept Contact Connecting Unit 개발에 관한 연구

편정헌,이정윤,유수열,김호경,김원주 한국공업화학회 2008 한국공업화학회 연구논문 초록집 Vol.2008 No.1

유해가스 및 분진이 발생하는 작업장내의 자연환기에 대한 연구

김철,추병길,최종욱,유수열 한국산업안전학회 2000 한국안전학회지 Vol.15 No.1

In recent, occupational diseases in harmful working places become a social issue. It is the well-known fact that a respiration in polluted working places exert a serious effect on health of workers. Accordingly, the cutting off contaminants air originally is the best way to improve working environments. In these cases, ventilation systems should be essentially installed to dilute or exhaust the contaminated indoor air. In this study, we investigated the characteristics of ventilation system of the noxious gas in working indoor places with natural ventilation by using COMET. The numerical simulations were carried out the natural ventilation with two phase(air, dust). For turbulent flow, Reynolds stresses were closed by the standard k-εmodel. The results are as follows ; 1) In the natural exhaust in the working place, the flows of the central region have a more rapid velocity vector than the right and left one. 2) Numerical results show that the distribution of contaminants concentration have greater influence on convection than the case of diffusion by government of velocity vectors. 3) To observe the velocity variation with distance, three location of distance are considered. As results, it shows that the velocity are 0.075(m/s) at y=5(m), 10(m) and mean concentration are raised 10.6% at y=5(m), 10(m). 4) We have presented the useful data for the adequate counterplan in the harmful working places by carrying out the various investigation of the natural ventilation.

축열 연소시스템의 최적화 구현을 위한 사용자 전용 해석 프로그램의 개발

강관구 ( K. G. Kang ),유수열 ( H. S. Ryou ),유홍선 ( S. Y. Ryou ),김혁주 ( H. J. Kim ),노동순 ( D. S. Noh ) 한국열처리공학회 2003 熱處理工學會誌 Vol.16 No.3

N/A In this study, a user oriented CFD program for optimum design of a regenerative combustion furnace. REBURN was developed. For user`s convenience, user friendly Graphic User Interface was made and the renumbering interface program was developed in order to directly input any generated mesh system from ICEM CFD/FEA. Also an automatic processing system for switching mode was developed. The program was verified through comparing with commercial CFD code about regenerative combustion furnace. Then, numerical simulation of real walking beam furnace used in real industry was performed and the parametric analysis was studied about the arrangement mode. As a results, the uniform temperature was appeared in the cross mode.