• Journal of Digital Convergence
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• v.11 no.11
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• pp.651-659
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• 2013

Purpose: This study was to analyze research reports published in Korea on physical activity for adult. Method: Based on inclusion criteria, 11 research reports were included in this review. Published year of selected articles was between 1990 and 2012. Eleven studies were analyzed by guidelines of the physical activity program done by experimental and quantitative research. Result: The characteristics of objects were mostly of non disease adult, over 65 years old, and female. Most educational content were about physical activity understanding, diet, nutrition. A large percentage of outcome indicators were body composition, physical function. Conclusion: Various types of physical activity program in Korea were performed by researchers. Therefore, we need to develop the standard protocol, to add educational intervention, and to study cost effectiveness of healthy.

• Journal of Digital Convergence
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• v.10 no.7
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• pp.193-200
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• 2012

This study aims to provide an important base resource for the effective medical supply system construction by figuring out the characteristics and changes of admission medical use of gastritis in 160 middle treatment areas classified by 2008 patient examination resources, and by figuring out factors affecting on changes. As a result, in terms of admission rate according to sex and age standardization per small area, there were differences as EQ was 15.1 and CV was 0.4. Top 10 variations were mainly in rural areas. It showed significant positive relations between admission and the number of bed, doctor and special medical equipment per 10,000 population. It is recommended that the government set a priority in the management of regional bed supply and the distribution of efficient medical resources.

• Management & Information Systems Review
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• v.31 no.4
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• pp.539-557
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• 2012

This study purposes to analyze how the level of diversification affects cost stickiness behavior. Specifically, we document that cost stickiness behavior is bigger in case of firm with a high level of related diversification. The purpose mentioned above are empirically tested using 1,508 firm-year data listed on Korea Stock Exchange from 2000 to 2009 and regression analysis methods were used for the analysis of the research hypotheses. The following are the results of this study : First, the increase in SG&A(selling, general and administrative costs) as sales increases is greater than the decrease in SG&A in respect to the equivalent decrease in sales. Second, cost stickiness behavior is bigger in case of firm with a high level of diversification. Also, cost stickiness behavior is bigger as the level of related diversification increase. These results imply that the level of diversification effects on the cost stickiness behavior.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.06a
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• pp.449-451
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• 2009

Sea level rise and increase of the typhoon/hurricane intensity due to global warming have threaten coastal areas for residential and industrial and have been widely studied. In this study we showed our recent efforts on sea wind which is one of critical factors for safe maritime traffic and prediction for storm surges and waves. Currently, most of numerical weather models in korea do not have sufficient spatial and temporal resolutions, therefore we set up a find grid(about 9km) sea wind prediction system that predicts every 12 hours for three day using Weather Research and Forecasting(WRF). This system covers adjacent seas around korean peninsula Comparisons of two observed data, Ieodo Ocean Research station(IORS) and Yellow Sea Buoy(YSB), showed reasonable agreements and by data assimilation we will improve better accurate sea winds in near future.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.6
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• pp.4048-4055
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• 2015

The purpose of this study is to examine the awareness of biomedical ethics of long-term care hospital nurses. A survey research was conducted in this study with 183 nurses that worked for over five months at long-term care hospitals located in Gwangju and Jeonnam region. Using SPSS 21.0 program, collected data were analyzed through descriptive statistics, independent t-test and one-way ANOVA. $Scheff{\acute{e}}$ test and Pearson's correlation analysis were also used for post hoc test. In terms of the awareness of biomedical ethics of the research participants, it was at an above average level. Among the sub-categories of biomedical ethics, awareness of right of life of fetus and awareness of artificial abortion showed most meaningful correlation. It would be necessary to provide bioethics education to new nurses or university students majoring in Nursing at related organizations or college of nursing to help them establish ethical values to seek patients' well-being.

• Journal of Korean Society of Transportation
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• v.20 no.7
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• pp.23-29
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• 2002

Five and more leg intersections have been still in operation in many urban areas. The number of conflicts in five leg intersection is more than four leg intersection. The signal timing design in the five leg intersection should be performed not only to reduce delay but also to increase safety. This paper suggests safety enhanced signal phase sequence design of a rotary with five leg intersection such as phase sequence minimizing the number of conflict points at the rotary with five leg intersections and the phase-length-design procedure by utilizing the Traffic Network Study Tool(TRANSYT). Field data was collected from Gonguptap five leg intersection in Ulsan and TRANSYT-7F was applied for signal timing design model. Optimal signal phase length and sequence of TRANSYT-7F is rearranged based on the Principal of "two moving traffic flows per phase". In conclusion, proposed signal phase design increased delay by 6.2% compared with the optimal signal phase of TRANSYT-7F. However, it could decrease the number of conflict in the five leg intersection by 61.5%.

• Journal of Korean Society of Transportation
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• v.31 no.5
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• pp.79-88
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• 2013

Recently, due to THE MOBILITY ENHANCEMENT FOR THE MOBILITY IMPAIRED ACT, local governments have tired to make various efforts on special transport services(STS), low-flow bus, and installing elevator in subway stations for handicapped people. But in case of STS, insufficient numbers of taxi are raised against the increasing demand of hadicapped people due to the limited budget. This study investigated actual use condition of STS and characteristics of selection of handicapped people on Duribal. In addition, an ordered-logistic model was employed for developing taxi use prediction model considering taxi fare discounts for diverting Duribal demands to taxies. The results can be a significant basic data for transportation policies to improve travel efficiency of the handicapped.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.55-55
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• 2011

기후변화는 지구 온난화와 같은 인위적인 변화와 기후 자체의 자연적인 변동성에 기인하고 있으며 기후변화의 영향으로 인해 물관리 분야에도 영향을 받고 있다. 이러한 기후변화의 영향은 가용 수자원량의 예측과 이를 관리하는 측면의 불확실성을 증가 시키고 있으며 미래 물관리가 더욱 어려울 것으로 전망되고 있다. 이에 본 연구에서는 기후변화에 대응한 수자원의 종합적인 관리 차원에서 시공간적 물수급 불균형 해소를 위한 방법론을 제시하고자 유역 물관리 모형인 KModSim을 이용하여 낙동강유역을 대상으로 수자원 네트워크를 구축하였다. 유역의 자연유량을 산정하기 위하여 SWAT 모형을 이용하였으며, 현실적으로 유역의 물관리 문제에 접근하기 위해서 낙동강 유역의 수리시설물, 생 공용수 및 농업용수, 댐용수 및 하천수 점용허가 등의 수리권 자료에 근거하여 KModSim을 구축하였다. 미래 기후변화 시나리오(온실가스 배출이 현 수준에서 지속될 것으로 가정한 균형적 발전 시나리오인 A1B 사용)를 적용하였으며 현재(1980~2009년)와 미래(2011~2100년)를 각각 30년씩 구분하여 기후변화에 대한 생활 공업 농업용수의 수요량 변화, 하천유지용수의 공급 변화, 다목적 댐 모의 운영 결과를 검토하였다. 낙동강 유역의 상류 다목적댐의 용수공급 능력은 2040년 초반부터 저류량이 감소 등 물공급에 심한 영향을 받을 것으로 전망되었다. 이와 같은 기후변화의 영향은 수요량에 대응하는 저수지의 공급능력에 영향을 주게 되어 물공급 시설의 운영에 어려움이 있을 것으로 전망되었다. 농업용수에 대한 기후변화의 영향평가 결과 또한 2041년부터 2070년의 기간에 부족이 발생하는 것으로 모의되었다. 생활과 공업용수의 물공급은 기존의 물공급 시설 투자 덕분으로 기후변화의 영향이 두드러지지 않은 것으로 나타났으나 일부 지역은 기후변화에 영향을 고려하지 않더라도 취약한 것으로 모의 되었다. 하천유지유량의 경우 지류가 본류에 비해 하천유지유량의 확보가 어려운 것으로 나타났지만 양적으로는 본류가 부족량이 더 많은 것으로 모의되었다.

• Tunnel and Underground Space
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• v.29 no.5
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• pp.318-331
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• 2019

A three-dimensional(3D) equivalent continuum modeling was performed to analyze hydraulic behavior of rock mass considering discontinuities by using DFN model and smeared fracture model. DFN model was generated by FLAC3D and smeared fracture model was applied by using FISH functions, which is built-in functions in FLAC3D, for equivalent continuum model of fractured rock mass. Comparative analysis with 3DEC, which is for discontinuum analysis, was conducted to verify reliability of equivalent continuum analysis by using FLAC3D. Similar results of hydraulic analysis under the same conditions could be achieved. Equivalent continuum analysis of fractured rock mass by using DFN model was implemented to compare with existing analytical methods for inflow into the tunnel.

• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.108-108
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• 2015

준설이란, 물리적으로 수저의 퇴적물을 제거함으로써 하도관리에서 가장 확실하게 퇴적물을 제거하고 통수 단면적을 증가시킬 수 있는 방법 중 하나이다. 우리나라에서는 주로 해안이나 항만에서 주를 이루어져 왔으며, 하천에서는 주로 골재채취를 목적으로 하는 소규모 준설사업이 대부분이었다. 그러나 4대강 살리기 사업으로 인해서 건설된 다기능보는 수위 및 유량을 조절할 수 있다는 장점이 있는 반면, 흐름 및 유사의 연속성을 차단하여 유사퇴적이 발생할 가능성이 높아졌음으로 이를 위한 대책으로 유지준설이 이루어져야 한다. 준설은 대규모의 사업비가 투입되는 건설공사이면서, 수저의 퇴적물을 물리적으로 제거함에 따라 고탁도를 발생시키고 생태계를 교란시키는 등의 문제가 있다. 준설선진국인 미국의 경우, 이러한 문제점을 최소화하기 위한 일환으로 환경창(EWs; Environmental Windows)을 개발하여 미국 준설사업의 약 80%에 적용하여 관리하고 있다. 환경창이란, 준설 및 준설토 처분에 관한 작업이 이루어질수 있는 기간을 의미하여, 결정적으로 사회 환경적으로 준설에 따른 영향의 강도가 상대적으로 작은 기간을 선정하여 준설을 허용하는 기간이다. 본 연구에서는 이러한 환경창를 국내에 적용하기 위하여 어류, 조류, 친수시설 이용빈도, 홍수기를 이용하였다. 연구대상지역은 낙동강 유역의 금호강 합류점이며, 홍수기에는 준설하지 않는 것을 대전제로 하였다. 어류는 대표어종을 선정하여 연구를 진행하였고, 그 외 조류는 법적보호종인 흑두루미, 친수시설 이용빈도는 4대강 방문객 통계자료를 사용하였다. 엔트로피 가중치 산정방법을 통하여 각 속성별 가중치를 산정하여 최종적으로 한국형 환경창을 제시하였다. 본 연구에서 제시한 한국형 환경창은 기존의 환경창과 비교하였을 때, 영향의 정도를 수치로 표현하여 의사결정권자가 간편하게 환경창을 결정할 수 있도록 의사결정지원을 한다는 장점이 있다.