거래량 지표를 이용한 코스피200 선물 매매 전략

조성현,오경주,Cho, Seong-Hyun,Oh, Kyong Joo 한국데이터정보과학회 2013 한국데이터정보과학회지 Vol.24 No.2

In this study, we propose a new trading strategy by using a trading volume index in KOSPI200 futures market. Many studies have been conducted with respect to the relationship between volume and price, but none of them is clearly concluded. This study analyzes the economic usefulness of investment strategy, using volume index. This analysis shows that the trading volume is a preceding index. This paper contains two objectives. The first objective is to make an index using Correlated Volume Index (CVI) and second objective is to find an appropriate timing to buy or sell the Kospi200 future index. The results of this study proved the importance of the proposed model in KOSPI200 futures market, and it will help many investors to make the right investment decision. 본 연구에서는 코스피200 선물시장에서 거래량 지표를 이용한 매매 전략을 제안한다. 거래량과 주가의 인과성에 대한 많은 연구가 진행되어 왔으나 뚜렷한 결과를 도출하지 못하였지만, 본 연구에서는 거래량을 사용하는 투자전략의 경제적 유용성을 실증 분석하여 거래량이 주가의 선행 지표라는 것을 지지하였다. 본 연구는 크게 두 가지 목적을 가지고 있다. 첫 번째 목적은 CVI (correlated volume index)라는 거래량을 사용한 지표를 생성하는 것이다. 두 번째 목적은 이를 이용하여 코스피200 선물 지수의 적절한 매수시점과 매도시점을 정하는 것이다. 이 논문의 실험결과는 제안된 모델의 유용성을 증명할 수 있을 것이며, 또한 이를 통해 시장참여자들의 투자 결정에 있어 도움을 줄 수 있을 것이다.

Study on Optimal Design and Analysis of Worm Gear and Casing of 5 Ton Class Worm Gear Reducer

Seong Hyun Cho(조성현),Chang Min Jeon(전창민),Zheon Qin(진진),Dongseon Kim(김동선),Sung-Ki Lyu(류성기) 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.12

The worm reducer is capable of quadrature power transmission when the shafts are disposed at right angles to each other. Since a large reduction ratio can be obtained of up to approximately 1/100 and a sliding movement is performed during operation compared with other gears, the noise and vibration are small, and there is the advantage that reverse rotation can be prevented. On the other hand, severe wear and damage are displayed on the gear and worm tooth surface, and many defects, such as intense heat generation of the reducer, occur. In the reducer case, the four-piece casing method was selected to solve the problems of heat generation, transmission efficiency, and assemblability. In this paper, we analyzed the problems of the worm and worm wheel (the core parts of a 5-Ton worm reducer) and casing through these methods and researched how to solve them.

고고도 무인항공기의 패턴 시뮬레이션 기반 재생연료전지 시스템 특성 연구

조성현(Seong-Hyun CHO),차문용(Moon-Yong CHA),손영준(Young-Jun SOHN),양태현(Tae-Hyun Yang),김민진(Minjin KIM) 한국신재생에너지학회 2015 한국신재생에너지학회 학술대회논문집 Vol.2015 No.6

고성능 냉간성형 합성보의 휨성능 및 내진성능 평가

조성현(Cho Seong hyun),김상섭(Kim Sang Seup) 한국방재학회 2017 한국방재학회논문집 Vol.17 No.2

최근 강구조건축물들이 다수 설계되고, 합성구조시스템에 대한 연구가 여러 분야에서 다양하게 진행되고 있다. 이에 본 연구에서는 고성능 냉간성형 합성보의 형상을 개발하고 휨성능 및 내진성능을 실험을 통해 평가하였다. 휨성능 실험결과 보 춤 및 강판의 두께에 따라 안정적인 내력증가를 보였으며, KBC 2009의 합성보 설계기준으로 내력평가가 가능한 것으로 판단된다. 내진성능 실험결과 부모멘트철근 및 보 춤의 증가에도 충분한 내진성능을 확보하는 것으로 확인되었다. 또한 공칭모멘트는 소성모멘트 이상의 내력이 확보되었고 소성회전각도 합성중간모멘트골조의 요구조건을 만족하였다. Recently many steel structure are constructed and many studies about the composite structural system are proceeded variously. This study suggests the new shape of High performance Cold forming composite beam and evaluates the bending performance and seismic performance by the test. The results of the bending performance test showed that the capacity of the beam was increased stably according to the increasing of the depth of beams and the thickness of steel plates, and it is possible to apply the existing evaluation equation of KBC 2009. The results of the seismic performance test showed that the capacity of the connection was increased stably according to the increasing number of the negative moment rebar and the depth of beam. Also, the maximum moment is above the plastic moment and the connection satisfies the requirement of intermediate moment frame.

시간관리기술 훈련이 아동의 자기주도적 학습력과 자기효능감 향상에 미치는 효과

조성현 ( Seong Hyun Cho ),허승희 ( Sung Hee Huh ) 한국교육학회 부산지회 2008 釜山敎育學硏究 Vol.21 No.-

이 연구에서는 아동들에게 시간관리 훈련을 실시하여 그것이 아동의 자기주도적 학습력과 자기효능감에 미치는 효과를 알아보고자 하였다. 초등학교 4학년 남·녀 아동들 60명을 대상으로 하여 전후검사 통제집단 설계를 통하여 그 효과를 알아본 결과, 이 연구에서의 시간관리 훈련 프로그램은 아동의 자기주도적 학습력 및 자기효능감의 향상에 의미있는 효과가 있는 것으로 나타났다. 따라서 이 연구에서의 시간관리 훈련 프로그램은 초등학생들의 자기주도적 학습력과 자기효능감 향상을 위한 유용한 훈련 자료로서의 의미를 가진다고 볼 수 있다. The purpose of this study is to evaluate the effect of time-management skills training on self-directed learning and self-efficacy of elementary school students. The subject are 60 elementary school children of 4th grade. The tools are Time-management skills training program, self-directed learning test and self-efficacy scale for children. The test ran 2 times as pre-test before experiment program, post -test after experiment program. The results of this study are as follows. First, experimental group showed progress in self-directed learning through the time-management skills training. That is, time management skills training is effective on openness of opportunity of learning, self-concept of efficient learner, the initiative of learning, affection and genetic on learning, a sense of responsibility of self-learning, creativity, basic learning skills and problem solving skill. Second, experimental groups of elementary school students showed progress in self-efficacy through the time-management skills training. That is, time management skills training is effective on self confidence and preference of difficult tasks.

환자에게 제공된 실제 간호사 배치수준에 근거한 일반병동 간호관리료 산정방안

조성현(Cho, Sung-Hyun),김진현(Kim, Jinhyun),성지영(Seong, Jiyeong),이지윤(Lee, Ji-Yun) 한국간호행정학회 2023 간호행정학회지 Vol.29 No.5

Purpose: This study aims to propose revised inpatient nursing fee schedules that address three discrepancies between actual nurse staffing levels in general wards and the corresponding patient payment structures. Methods: A total of 45 tertiary hospitals, 329 general hospitals, and 1,379 hospitals from publicly released data for 2021~2022 were analyzed. This analysis focused on three primary discrepancies between (1) the staffing grades under which patients were hospitalized and the corresponding grades for which they were charged; (2) the staffing grades determined by bed-to-nurse and patient-to-nurse criteria; and (3) the current differentiation rates of nursing fees and the expected differentiation rates based on the number of nurses required for each grade. Results: The first discrepancy occurred in 8.9% of tertiary hospitals, 21.0% of general hospitals, and 26.0% of hospitals. The bed-to-nurse and patient-to-nurse grades differed by 2.23 and 2.29 grades on average in general hospitals and hospitals, respectively. The current differentiation rates were higher than the expected differentiation rates. New nursing fee schedules were suggested to resolve those discrepancies. Conclusion: Nursing fees should be charged to reflect the staffing levels under which patients were cared for and proportionate to the number of nurses required to provide the corresponding staffing levels.

태권도 지도자의 리더십유형과 조직유효성 및 조직시민행동의 관계

조성현(Cho, Sung-Hyun),박상배(Park, Sang-Bae),권오성(Kwon, O-Seong),김태일(Kim, Tae-Il),함지선(Ham, Ji-Sun) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.5

The purpose of this study was to investigate the cause-effect relationship between the leadership style of taekwondo coach theory under the environments of a taekwondo player, and by using such organizational effectiveness as parameters, it is also to identify casualty of the organizational citizenship behaviors in between, so then it will be meaningful to provide these basic reference materials that may be of great use in establishing elevation in result of taekwondo player. Data were analyzed through frequency analysis and exploratory factor analysis using SPSS 15.0, and analyzed through confirmatory factor analysis and covariance structure analysis using AMOS 7.0 program. Results revealed from these research methods and analyses of data are as follows: First, leadership style of taekwondo coach had significant influences on organizational effectiveness. Second, leadership style of taekwondo coach had not significant influences on organizational citizenship behavior. Third, organizational effectiveness resulted in significant effect on organizational citizenship behavior. Fourth, customer satisfaction affected purchase behavior significantly. Fifth, direct effect of leadership style of taekwondo coach on the organizational effectiveness was revealed as of .869, and the direct effect of leadership style of taekwondo coach that affected organizational citizenship behavior revealed as .245, and the indirect effect that influenced on organizational citizenship behavior through organizational effectiveness resulted in .531, therefore, total effect was .776, and direct effect of organizational effectiveness on the organizational citizenship behavior was revealed as of .611, variables.

Backsheet 반사율에 따른 Shingled Mini Module 출력변화에 대한 연구

조성현(Seong Hyeon Cho),문지연(Ji Yeon Moon),손형진(Hyoung Jin Son),전다영(Da Yeong Jun),김성현(Sung Hyun Kim) 한국태양광발전학회 2020 Current Photovoltaic Research Vol.8 No.4

It is very important to optimize the reflectance of incident light in solar modules for improving output power and reducing loss of cell-to-module (CTM). It is assumed that a higher reflectance backsheet may improve optical efficiency. However how much output power is related to optical properties by reflectance property of backsheets have not been revealed clearly yet. A total of 3 types of industrial backsheets with 3 type of industrial encapsulants (EVA or POE) were analyzed as fabricated mini modules used shingled cells. According to the type of backsheets, the difference between the highest and lowest average reflectance in the range of 400 nm to 1200 nm was found to be 13.08% by UV-visible spectroscopy. Also, when using the same encapsulant, the maximum gap value of the output power increase was measured by about 3.755 mW% (166.02 mW). The correlation between reflectance and output power was experimentally found by measuring the output property of the fabricated shingled mini modules.

춤이 작은 신형상 고성능 하이브리드 합성보의 휨성능 평가

김성배,조성현,오광수,전용한,최영한,김상섭,Kim, Sung Bae,Cho, Seong Hyun,Oh, Kwang Soo,Jeon, Yong Han,Choi, Young Han,Kim, Sang Seup 한국강구조학회 2016 韓國鋼構造學會 論文集 Vol.28 No.3

본 연구는 합성보와 하이브리드보의 장점을 활용한 신형상 하이브리드 합성보의 형상을 개발하였으며, 그 중 춤이 작은 형상의 휨성능을 검증하기 위해 12개의 휨 실험체를 제작하여 단조가력 실험을 진행하였다. 휨성능 실험결과, 공칭하중에 대한 실험체 최대하중의 비는 평균 1.24배로 안정적인 내력을 확보하였으며, 합성보의 내력평가는 기존 합성보 내력평가식(KBC 2009)을 적용 가능한 것으로 판단된다. 또한 하부강판에 고강도강($F_y=650MPa$) 적용 시 소재의 기계적 특성 및 구조성능에 대한 충분한 사전검토가 필요할 것으로 판단된다. This study developed the shape of low depth new shape high performance hybrid composite beam which is taken strengths and compensated the defect of composite beam and hybrid beam. Also, this study performed the monotonic test to evaluate the bending performance of Low depth shape by creating 12 bending specimens. Bending performance test result showed that capacity of the beam was increased stably. Also, it is possible to apply the existing evaluation equation(KBC 2009) of composite beam. Mechanical properties and structural performance of materials are considered when high-strength steel ($F_y=650MPa$) is applied to the bottom plate.

도 · 소매업종의 작업위험요인에 관한 연구

김현오(Hyun Ho Kim),김규완(Kyu Wan Kim),조성현(Sung Hyun Cho),김대성(Day Sung Kim),김증호(Jeung Ho Kim),강성규(Seong Kyu Kang) 대한인간공학회 2008 大韓人間工學會誌 Vol.27 No.1

The purpose of this survey was to identify ergonomic risk factors of work-related musculoskeletal disorders (MSD) and understand the current MSD risk status in the wholesale/retail industry. The field survey was conducted at 120 wholesale/retail establishments, and the cause of MSD occurred from the national industrial accident statistics by the Ministry of Labor in 2006 was analyzed in terms of company size, a term of work, job title, and cause of occurrence. The numbers of disasters on MSD were 602 which were included 432 disasters who met with low back pain by incident. A checklist was developed by KOSHA to use for the field survey. A total of 419 tasks were identified at the 120 establishments surveyed. The highest frequency was Task 2(45%) which was mostly observed in repetitive work (e.g. displaying, scanning, cutting or wrapping of goods). The second and third were Task 9(34%) and Task 8(14%) which were identified in manual materials handling (e.g. lifting, lowering, carrying or stocking of goods). The results suggest that the three Tasks should be first considered for the control in wholesale/retail industry and that exposure to MSD risk factors in those Tasks should be primarily addressed in order to reduce MSD risk in that industry.