• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.05a
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• pp.178-180
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• 2018

해상교통조사는 국내 해상교통안전진단 및 선박 통항과 관련한 안전성 평가에 혼잡도 평가 등 중요한 역할응 한다. 이 연구에서는 해상교통조사 기간에 대한 통계학적 검토를 통한 통계적 적정성과 선박 통항의 특성을 반영하여 부산항 북항의 PORT-MIS를 바탕으로 항만의 입출항 선박 통계를 바탕으로 일별, 월별, 특정 기간에 대하여 분석하고 현재 해상교통안전 진단 등에 규정된 해상교통안전기간에 대한 통계적 검토를 시행하였다. 월별 검토 결과 부산항은 12월에 0.88로 가장 적은 수의 선박이 입출항 하였고 8월에 1.13으로 가장 많은 수의 선박이 입출항 하였으며 약 22%많았다. 요일별로는 일요일에 가장 작은 수의 선박이 입출항 하였으며 관측 시기에 따라 3일에는 약 30%이내에 오차가 발생하였으며 7일에는 20%이내의 오차가 발생하였다.

• Korean journal of food and cookery science
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• v.3 no.2
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• pp.50-58
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• 1987

This study was conducted to examine the changes of sensory and instrumental characteristics focusing on flavor and texture of cooked rice with Akibare(Japonica type) and Milyang 23(hybrid of Japonica and Indies) under two different storage temperatures. The changes of sensory characteristics were not significant throughout the storage of 70 days at $5^{\circ}C$, but were significant after 30 days storage at $30^{\circ}C$. The stepwise regression showed that stickiness, gloosiness and off-flavor of rice effected on overall preference in old rice stored at $30^{\circ}C$. As making storage temperature be tiger and period be longer, hardness, springiness, gumminess and chewiness were increased further but cohesiveness and adhesiveness were decreased in the texture changes of cooked rice measured by Instron.

• Journal of the Korea Convergence Society
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• v.11 no.9
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• pp.59-63
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• 2020

This study was conducted to investigate the relation between visual analogue scale and recovery time with type of injury that occur in elite wrestling athletes. The incidence rate of injury was analyzed the Poisson ratio, and the VAS and recovery time according to the type of injury were compared using the one-way ANOVA. In addition, the VAS and recovery time were examine the relationship using the Simple Linear Regression, and statistical significance level was α =.05. Injuries occurred most commonly in the ligament, followed by the muscle, cartilage and tendon.The VAS and recovery time according to the type of injury was statistically significant (p=.001, p=.001, respectively). The VAS and recovery time according to the type of injury was statistically significant (p=.001, p=.001). Also, increase in VAS of 1 point was associated with about 1.89 recovery time. These studies are expected to be useful as basic data for return to sports and safe training.

• Korean Journal of Social Welfare Studies
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• v.44 no.3
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• pp.301-322
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• 2013

By analyzing wave 1~11 (1998~2008) of Korean Labor and Income Panel Study(KLIPS) database, this study examines the effects of household characteristics and poverty duration on poverty exit. A special concern is to decide whether the decrease of poverty exit rates comes from true duration dependency or from the sample heterogeneity as poverty duration progresses. I also analyzed how the effects of independent variables are changed when unobserved heterogeneity is controlled. The results show that duration dependency disappears after controlling observed household characteristics and unobserved individual heterogeneity. This finding confirms that the apparent relationship between poverty exit rate and poverty duration is in fact a spurious association due to the sample heterogeneity rather than true duration dependency. In addition, the effects of household characteristics on poverty exit rate become more stronger when unobserved heterogeneity is controlled. Socioeconomic factors affecting poverty exit rates are such as householders' age, education, household composition, number of family members, labor force participation, and work status.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.07a
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• pp.61-62
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• 2019

RPG장르를 기준으로 게임이용등급별 게임들의 평균 이벤트 기간의 차이를 조사, 분석한 결과, 게임이용 등급별 게임들의 이벤트 실시 기간의 평균의 차이를 보이지 않고 있음을 알 수 있다. 이에 본 연구에서는 정액제와 부분유료화 등 요금정책을 기반으로 정액제를 실시하고 있는 게임과 부분유료화를 실시하고 있는 게임간의 이벤트 실시 기간의 평균의 차이를 연구하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.10
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• pp.4762-4768
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• 2013

This paper investigated the impacts of theme, genre, and existence of originals on the number of visitors of children performance. Especially, we focused on the interaction effect of school periods with these variables. Using 954 performance data between 2010-2011 at Fantasia Theater run by Bucheon Culture Foundation, we found that entertaining performance, musical performance, and performance with existing originals had more visitors than others. Also, these impacts strongly existed during school periods. In result, this study found that school period should be considered seriously for the success of children performance.

• Journal of the Korea Institute of Building Construction
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• v.17 no.6
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• pp.577-585
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• 2017

HPC method is developing to improve the constructability and structural performance of the existing PC method. The objective of this study is to develop construction procedures and to analysis of construction period for HPC method. In order to develop construction procedures, the building construction data of the existing half-slab method was analyzed. Analyzing design drawings and specifications of nine construction cases, a prototype of half-slab method, was drawn. Applying the core technology of HPC method to the drawn prototype of half-slab method, a prototype of HPC method, was developed. The differences of both methods were 'installing PC column' and 'placing topping concrete'. To analysis the differences of both methods, seven construction cases were analyzed. According to the analysis for HPC method, cases1 and 2 had columns divided for construction shortened about 16% of a construction period. The schedule of column assembly work was analyzed to be shortened much. That is judged to be because the use of a hollow PC column leads to a decrease in the number of columns. In particular, if HPC method is applied to a building construction site using large columns, it is analyzed to shorten a construction period more than the existing Half-slab method.

• Journal of the Korean Society for information Management
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• v.35 no.2
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• pp.89-114
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• 2018

Research on changes in research trends in academic disciplines is a method that enables observation of not only the detailed research subject and structure of the field but also the state of change in the flow of time. Therefore, in this study, in order to observe the changes of research trend in library and information science field in Korea, co-word analysis was conducted with Korean author keywords from three types of journals which were listed in the Korea Citation Index(KCI) and have top citation impact factor were selected. For the time series analysis, the 15-year research period was accumulated in 5-years units, and divided into 2003~2007, 2003~2012, and 2003~2017. The keywords which limited to the frequency of appearance 10 or more, respectively, were analyzed and visualized. As a result of the analysis, during the period from 2003 to 2007, the intellectual structure composed with 25 keywords and 8 areas was confirmed, and during the period from 2003 to 2012, the structure composed by 3 areas 17 sub-areas with 76 keywords was confirmed. Also, the intellectual structure during the period from 2003 to 2017 was crowded into 6 areas 32 consisting of a total of 132 keywords. As a result of comprehensive period analysis, in the field of library and information science in Korea, over the past 15 years, new keywords have been added for each period, and detailed topics have also been subdivided and gradually segmented and expanded.

• Journal of Korea Society of Industrial Information Systems
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• v.16 no.5
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• pp.107-114
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• 2011

The purpose of this paper is to develop a reliability estimation process of agricultural machinery components using field failure data. Estimating the durability is a time-consuming in the product development process. Using the field data of tractor, failures for major parts are investigated and databases are developed. Accelerated life test using the stress analysis could improve Weibull B10 considerably. This estimation process is useful for preparing the design input and planning the durability target.

• The Korean Journal of Financial Management
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• v.17 no.2
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• pp.49-70
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• 2000

본 연구에서는 한국주식시장의 대표적 주가지수인 KOSPI 200 진입기업과 제외기업의 주가 행태에 어떤 변화가 있는지를 분석하였다. 1994년 6월 이후부터 1999년 정기변경때까지의 기간에 KOSPI 200에 새로 진입한 종목과 제외된 종목을 검증표본으로 하고 이와 유사한 특성을 가지는 기업들을 대응표본으로 삼아 두 집단간에 나타나는 비정상수익률 및 누적비정상수익률의 특성과 비정상수익률과 비정상거래량간의 관계를 비교 분석하였다. 사건일의 비정상수익률과 사건기간동안의 누적비정상수익룰에 대한 분석결과는 KOSPI 200에 새로 포함되거나 제외되는 종목의 주가행태에 뚜렷한 변화가 있다는 결과를 보여주지는 못하고 있다. 그러나 일부 표본의 분석결과는 KOSPI 200에 새로 진입하거나 제외되는 정보가 공시일 이전에 시장에 반영되는 모습을 보여주며, 외환위기 이후기간에 발생한 정기변경진입종목에 나타난 주가행태 변화와 주가변동과 거래량 변동간의 관계는 일부 가격압박가설로 설명될 수 있음을 보여준다. 그러나 본 연구의 분석결과는 지수 신규편입 종목들이 펀드에 신규로 편입되는 과정에서 거래량이 증가해 초과수익이 발생한다는 기존의 가격압박가설의 내용을 충분히 지지하지는 못하고 있다.