• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2007년도 추계 종합학술대회 논문집
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• pp.937-941
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• 2007

하천의 수문해석을 위해서는 하천의 정확한 유역의 분할과 수문지형인자의 추출은 유역의 유출해석에 막대한 영향을 미친다. 따라서 유역의 분할 및 수문지형인자의 추출은 여러 가지 형태로 연구되어 왔으나 아직까지 이러한 방법들에 대한 명확한 기준은 정립되어 있지 않은 상태이다. 최근 들어 GIS(Geographic Information System)를 수자원 분야에 적용하면서 과거에 비하여 많은 노력을 들이지 않고도 수치고도자료(DEM : Digital Elevation Model)를 이용하여 유역을 자유롭게 분리하고 대상지역의 수문지형인자를 손쉽고 객관적인 방법으로 산정할 수 있게 되었다. 그러나 기 구축된 국가지리정보(수치지도등)의 정도에 따라 수문지형인자의 변수값이 달라지는 등의 또다른 문제가 발생하고 있다. 따라서 본 연구는 하천의 유역내 홍수량 산정시 사용하는 수치지도(1:25000, 1:5000), 토지이용현황도, 토지피복도, 개략토양도, 정밀토양도등을 이용하여 유역의 수문지형인자 및 SCS 유출곡선지수(CN)를 GIS를 이용하여 효율적으로 추출하는 과정을 제시하고자 한다.

• Physical Therapy Rehabilitation Science
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• 제5권1호
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• pp.1-8
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• 2016

Objective: The present study was to investigate the discrimination capacity of the Performance Oriented Mobility Assessment-Gait Scale (POMA-GS), for predicting falls in stroke survivors. Design: Retrospective cohort study. Methods: Data including the characteristics and number of falls of 52 chronic stroke patients from a rehabilitation center were collected. The number of falls each subject had experienced in the previous year were investigated through interviews. The subjects were divided into two groups depending on the number of falls: if falls occurred twice or more on the basis of the time of study after stroke, they were defined as the falls group and if there was no fall experience or one fall, they were defined as the non-falls group. The subjects were examined with the POMA-GS, and physical functions were examined using by the One Leg Stand Test (OLST), Sit to Stand Test (SST), 10-m Walk Test, Lower Extremity in Fugl-Meyer assessment (FM-LE), and Trunk Impairment Scale (TIS). The validity of POMA-GS for falls prediction was analyzed. Results: In the POMA-GS, which predicts falls in stroke survivors, the cut-off value was 8.5 (sensitivity 72%; specificity 65%) and the area under the curve was 0.75 (95% confidence interval: 0.60-0.90, p<0.007). There was a significant difference in the OLST, SST, FM-LE, and TIS between the subjects with POMA-GS >8.5 and the subjects with POMA-GS ${\leq}8.5$. Conclusions: The POMA-GS could be a useful tool in predicting falls in stroke survivors, as its discrimination capacity and predictive validity is proven satisfactory.

• 한국포장학회지
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• 제12권2호
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• pp.87-90
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• 2006

식품 보관 용기로서 옹기의 기능성을 설명하려는 하나의 시도로서 옹기의 열특성과 수분 흡착 및 기체 흡착 특성을 측정하였다. 옹기의 열전도도와 열확산도는 기공율이 증가함에 따라 감소하였으며, 비열은 기공율보다는 구성 흙의 조성에 의존하는 것으로 나타났다. 옹기의 열차단성은 유리와 비슷하였으며, 금속포장재보다는 높은 열차단성을 가지나, 종이 및 플라스틱보다는 낮은 열적 차단성을 가졌다. 옹기는 상대습도 90% 기준에서 원료 흙에 관계없이 약 0.0005 g/g 건물 기준의 수분을 흡착할 수 있었으며, 약간의 $CO_2$ 및 에틸렌 가스를 흡착할 수 있었다 ($CO_2$약 $17{\mu}g/g$, 에틸렌 가스 약 $2.6{\mu}g/g$). 옹기의 열특성과 기체 흡착특성은 식품보관에 이용될 수 있는 독특한 특성을 가지는 것으로 평가되었다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2002년도 전력전자학술대회 논문집
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• pp.459-461
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• 2002

Various device or devices is automated by developments of various control appliance. however, the control method is not escaping local area System. In these meaning, this research uses PLC and HMI software for the Growth Chamber's remote monitor and control.

• East Asian mathematical journal
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• 제32권2호
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• pp.233-251
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• 2016

This study aims to investigate the presence/absence of subjects in the area of finance insurance sector in the past and corresponding areas of the courses in accordance with the reform of Korean school mathematics curriculum. In addition, the study had analyzed the linkage to the curriculum of the subjects for the Junior High, and High School in accordance with the school mathematics as mathematical knowledge base. As the results of this study, it was identified that the knowledge of mathematical contents addressed in the school mathematics education had a very high connectivity as basic mathematical knowledge to understand and utilize high level of the insurance mathematics required for the job performance in the finance insurance sector.

• Journal of international Conference on Electrical Machines and Systems
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• 제2권3호
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• pp.361-366
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• 2013

This paper presents the effect on application of the flywheel energy storage system (FESS) for load frequency control (LFC) of an interconnected 2 area power system. To do this, the control characteristics with the FESS were compared with that of the conventional governor controller. The controller for the FESS control and the governor control used a PID type controller. Both the FESS PID controller and the governor PID controller using genetic algorithm (GA) were designed to optimize the PID parameters. The frequency and generation output characteristics with the only FESS controller and with the only conventional governor controller were compared. To verify robust performance of the FESS controller, the computer simulations were performed under various disturbances. The simulation results showed that the FESS controller provided better dynamic responses in comparison with the conventional governor controller.

• 한국산업융합학회 논문집
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• 제20권2호
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• pp.125-132
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• 2017

The slope of the road in the forest area has a characteristic of steep slope, so natural disasters such as slope collapse occur. The slope displacement observation technique according to landslide is being studied as a method to observe a wide area and a method to observe a small area. This is a study on high-precision digital map generation using ground LiDAR. It is possible to create a high - precision digital map by minimizing the US side using the 3D LiDAR in the steep slope area where the GPS and Total Station measurement are difficult in the maintenance of the danger slope area. It is difficult to objectively evaluate whether the contour lines generated by LiDAR are correct and it is considered necessary to construct a test bed for this purpose. Based on this study, if terrain changes such as landslides occur in the future, it will be useful for measuring slope displacement.

• The Korean Journal of Ecology
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• 제17권2호
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• pp.213-222
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• 1994

Songs recorded in Chirisam(1990~1993) and $Ull\v{u}ngdo$(1992~1993) areas were analyzed to investigate the features and variances in songs of Great tit, Parus major. Songs of Great tits were identified, most of which were repetitions of phrases composed of high-frequency note and low-frequency note. The CV range of the Chirisan Great tit group was wider than that of the $Ull\v{u}ngdo$ area. ANOVA analysis level was highly significant (p<0.0001) for Chirisan area and $Ull\v{u}ngdo$ area. Inter-regional variance level was significant (p<0.05) in the maximum of low-frequency.

• 한국습지학회지
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• 제2권2호
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• pp.147-157
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• 2000

The objective of this study is to develop a NGIS-GUI (National Geographic Information System-Graphic User Interface) system for the computation of peak discharge at drainage basin outlet. The developed system is composed of GIS data extraction module, peak flow computation module and output display module. The selected study area is the Sungjun reservoir area near the Milyang, Kyungnam province and the peak flows depending on various recurrence intervals are computed and graphically displayed. The developed system will be useful for the scientific water flow management in the study area.

• 대한영양사협회학술지
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• 제11권3호
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• pp.299-308
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• 2005

The purpose of this study was to investigate the college and university student's perception on the brand awareness of contract foodservice management company in Incheon area. The developed questionnaires were distributed to the college and university students in Incheon area from September 20 to September 24 in 2004. Total 198 questionnaires were used for the final data analysis with response rate of 82.5%. The results showed that 85 % of the students has known that the foodservice operation was managed by contracted management company, only 56.5% of them have known the exact name of contract foodservice management company managing their cafeteria. It was recommended therefore that contract foodservice management company need more efforts for widening public activities for their company's name.