• Ecology and Resilient Infrastructure
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• v.4 no.4
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• pp.245-254
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• 2017

In this study, the flow characteristics and bed changes in the upstream and downstream of weirs with the variation of the weir angels are investigated quantitatively through the laboratory experiments. As the angle of weir increases, the effective weir length decreases. Delta is developed by the sediments inflow upstream and migrates downstream. Delta migration speed decreases as it approaches to the weir upstream, and the size is getting big. As the dimensionless weir length increases, the dimensionless wave length decreases at the downstream of the weir. However, the dimensionless bar height decreases. The dimensionless wavelength increases with the bar height downstream from the weir.

• KCID journal
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• v.17 no.2
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• pp.82-94
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• 2010

Recently, biomass application for energy is getting more interests from many countries since biomass is widely available over the nation wide, whereas fossil fuels are produced in several limited regions. Recognizing the importance, government is promoting renewable energy use in Korea. The locational characteristics of the existing biomass potential directly can be used to decide scale of power plant for local agricultural facility. Although there are a few studies on feasible biomass potential in local areas, it is expected that both government and commercial sectors recognize the potential of biomass energy and the importance of reducing greenhouse gases. When planning biomass energy systems, biomass price is determined by the costs of collection, transportation, chipping, drying if required. In this paper investigates the economic and spatial characteristic of biomass location by land use map. However typical area of each categories in local region is not correct to agricultural census data. Therefore we concerned about how to calculate feasible biomass potential which it can be describing total amount of plant scale, and to match both of data. Even though its spatial distribution, in rural area in Korea, to expand biomass energy programs in the area, government serve to find areas of higher biomass production with suitable locations for plants to convert to bio-energy in order to increase the usage of renewable energy.

• Journal of Korean Society of Rural Planning
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• v.19 no.4
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• pp.177-189
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• 2013

3D modeling and rendering technologies are getting more attention from landscape planners and architects because the virtual reality based on 3D graphic technology could give more realistic experience to landscape simulation users and boost promotional effects. The 3D landscape simulation, however, not only requires a lot of cost and time in production, but also demands efforts to distribute to consumers due to various computing environment of them. The purpose of this study is to suggest a process for developing an interactive 3D landscape simulator with low-cost, which can support multi-platform functionality in high quality through reviewing related current software and web services. We select GIMP for 2D image texturing, SketchUpfor 3D modeling, Unity for real-time rendering, and Google Earth for terrain modeling considering price and workability and apply the developed process for Windows, Web, and Android versions to test the applicability for Sangji-ri, Gosam-myeon, Gyeonggi-do, Korea.

• Journal of Korean Society of Transportation
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• v.28 no.1
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• pp.7-14
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• 2010

As globalization is making rapid progress, place of international trade based on seaports is changing to airports, which make logistic function in airport getting more important. Airports are required to serve as social overhead capital representing economies of scale as well as a logistic hub for integrating production, sales and transport for multinational corporations. In order to keep regional airport hub, many strategies are required such as development of hinterland and competitive advantage strategies. This paper tried to find determining factors to be a hub airport and competitiveness for hubbing, using the data from Incheon, Narita, Kansai, Nagoya, Singapore-Changi and Taipei airports. As the result of making an analysis of competitiveness of airports and competitive ranking excluding hinterland factors.

• Journal of Korean Society for Geospatial Information Science
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• v.17 no.1
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• pp.105-111
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• 2009

A construction can be more convenient and safer with adequate informations. Consequently, studies on collecting various informations using newest surveying technology and applying these informations to a construction have been making progress recently. Digital images are easy to obtain and contain various informations. Therefore, with the recent development of image processing technology, the application field of digital images is getting wider. In this study, we proposed to use a fisheye lens camera in underground construction sites, especially tunnels, to overcome inconvenience in photographing with general lens cameras. A program for mapping the surface of a tunnel and making a mosaic image is also developed. This mosaic image can be applied to observe and analyze abnormal phenomenons on tunnel surface like cracks, water leakage, exfoliates, and so on.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.33 no.9
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• pp.66-72
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• 2005

As one of the methods that determine position using GPS carrier phase without the resolution of integer ambiguity, the characteristics of the time difference is analyzed in this paper. When determining position by the needed accuracy, the difference time gap becomes an important factor. It is said that accuracy is improved as the difference time gap is getting large, and finally the centimeter level accuracy is achieved after a certain difference time gap. In this paper, the characteristics of the time difference is analyzed using real data and a new parameter is proposed to predict the resulting position accuracy. The difference time gap when position error is converged to the centimeter level is estimated with the proposed parameter.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.33 no.1
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• pp.45-55
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• 2020

Objectives : The objective of this study is to review the Trend of clinical trials conducted with the acupuncture treatment on Atopic Dermatitis. Methods : Through 4 foreign online databases(PubMed, Cochrane library, EMBASE, CNKI) and 3 domestic online databases(NDSL, RISS, OASIS), we searched for clinical studies performed acupuncture treatment for Atopic Dermatitis from 2010 to December 2019. Only randomized controlled trials(RCT) was selected and anlayzed according to the research method. Results : A total 4 studies were reviewed. LI11, ST36, SP10 were most frequently used acupoints in acupuncture treatment. Among the evaluation indexes, SCORAD, VAS, DLQI were used most. In most of the 4 studies, acupuncture treatment showed significant therapeutic effects. Conclusions : These results suggest that it is necessary to develop more detailed standards about Acupuncture treatment method as the method of acupuncture is getting more diverse, and objective tools are needed in evaluating Atopic Dermatitis.

• Journal of the Korea Safety Management & Science
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• v.11 no.1
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• pp.183-191
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• 2009

The purposes of this research are presenting a new business model by introducing USN/ZigBee and measuring productivity using BSC(Balanced scorecard), and becoming a cornerstone by presenting a prototype of ServiceScience which is getting more attention from Industrial Engineering and Management. The new business model consists of development of leak current monitoring sensor using USN/ZigBee and the adoption of RCM(Reliability-Centered Maintenance) using knowledge-based system at current distribution. Additionally, for the measurement of this new model's productivity, ESC is used, and the strategic map and measurement indices are produced. The main contributions of this paper are showing a concrete model of ServiceScience and demonstrating this model can be extended to similar areas like are gas, water etc.

• Korean Journal of Computational Design and Engineering
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• v.14 no.6
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• pp.415-423
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• 2009

Because of the fast changing car design and increasing facilities, manufacturing process of cars is getting more complex now a days. Particularly, car manufacturing system that consist of automated devices, applies various simulation techniques to validate device motion and detect collision. To cope with this problem, traditional manufacturing system deployed test-run with the real devices. However, increased computing power in a contemporary manufacturing system changes it into realistic 3D simulation environment. Similarly, managed device data that was generated using 2D traditionally, can be converted to 3D realistic simulation. The existing problem with 3D simulation is disjoint data interaction between different work stations. Consequently, JIGs, fixing the car part accurately, are changed according to fixing position on the part or a part shape properties. In practice, the 3D JIG data has to be managed according to kinematic information, but not of its features. However, generating kinematic information to the 3D model repeatedly according to frequent change in part is not explained in current literatures. To fill this knowledge gap, this paper suggests an improving method of rendering 3D JIG kinematics information to simulation model. Thereafter, it shows the result of implementation.

• Korean journal of food and cookery science
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• v.11 no.2
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• pp.145-152
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• 1995

The purpose of this study was to investigate the conciousness of college students about Korean folk foods. Questionnaires were distributed to 400 students and answered by 289 in the college in Kyung-gi Do and Je-ju Do. The results were as follows: 1. 49.8% of the students had little knowledge about Korean folk foods, 36.7%, 12.8% and 0.7% of the subjects were answered'know little','know somewhat', and'know well', respectively. 2. This study revealed that 25.6% of students ate folk foods'on a journey', 21.1% of subjects did'normal times', and 20.4% of them did'festival days'. 3. Students answered that they ate folk foods 3 or 4 times in a year mostly at home. 4. 96.5% of the subjects thought that Korean folk foods had to be succeeded, but 64.0% of the students knew about Kang-won Do folk foods, 34.3% of them answered correctly about Seoul folk foods, and 40.1% of them did Che-ju Do folk foods, and only less than 20% of them had an expert knowledge on the other folk foods. 5. The percentage of getting a correct solution was higher in men than women, majoring in foods than non- food relation, and taking a lesson in Korean folk foods than no lessons.