• Journal of the Korea Convergence Society
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• 제8권1호
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• pp.19-23
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• 2017

Energy is a vital resource for the economic growth and the social development for any country. As the industry becomes more sophisticated and the economy more grows, the electricity demand is increasing. So forecasting electricity demand is an important for electricity suppliers. Forecasting electricity demand makes it possible to distribute electricity demand. As the market for Negawatt market began to grow in Korea from 2014, the prediction of electricity consumption demand becomes more important. Moreover, power consumption forecasting provides a way for demand management to be directly or indirectly participated by consumers in the electricity market. We use Genetic Algorithms to predict the energy demand of the fishing industry in Jeju Island by using GDP, per capita gross national income, value add, and domestic electricity consumption from 1999 to 2011. Genetic Algorithm is useful for finding optimal solutions in various fields. In this paper, genetic algorithm finds optimal parameters. The objective is to find the optimal value of the coefficients used to predict the electricity demand and to minimize the error rate between the predicted value and the actual power consumption values.

• Journal of the Society of Disaster Information
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• 제13권1호
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• pp.15-25
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• 2017

Since the late 19th century, the annual average temperature of the Earth has risen due to excessive emission of greenhouse gases, and abnormal weather phenomena such as heavy rain and heavy snowfall have been increasing frequently all over the world. In a city with high population growth due to high economic growth, fire and terrorist accidents can cause serious property damage and human casualties. The purpose of this study is to propose the need for evacuated facilities to protect victims, and suggest adequate shelters' size which can be protectable them. In spite of the Ministry of Public Safety and Security designated 3.3 square meters of per capita capacity, they does not specify the basis about setting this criterion.

• The Journal of the Korea institute of electronic communication sciences
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• 제10권1호
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• pp.55-64
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• 2015

Wind turbine market is showed height growth rate of about 30% for year, and is increasingly growing. Total rate of domestic wind turbine installation is showing share of 0.2% of the global market that is 380MW. However, wind turbine installed in domestic are foreign product more than 90%. Similarly, Datalogger of pretest system for ocean wind turbine plant installation has been leaked huge cost to abroad by mostly abroad company product. In this paper, we proposed pretest weather resource measurement system for efficiency and investment cost cutting of wind turbine construction work. Preset weather resource measurement system is ocean weather resource measurement datalogger based on wireless communication(wifi) that have consist of hardware and software(wind rose) that is able to monitoring as datalogger of wireless bridge and battery state, wind direction, wind speed, temperature, humidity, radiation around weather tower and is able to analysis of measured data.

• Science of Emotion and Sensibility
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• 제11권2호
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• pp.245-256
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• 2008

Today, interior design industry is continuously developing in domestic and foreign, and the industry is getting more internationalized and professionalized day after day. At the same time, the interior design industry is overwhelmed by sudden changes. However, the sudden change can be regarded as a turning point requiring management paradigm shift and an understanding of fundamental concept of interior design industry management. In other word, it is the point where a design management strategy should begin. The previous management strategies are no longer effective. Only the companies providing impressive and practical designs followed from qualified market research and analysis can survive in the society. This research examined the tasks the interior design industry confronted and the factors of environmental changes, and analyzed the current status and trend of changing environments. The purpose of the research is to propose a direction to the effective management available in highly industrial national society.

• International Commerce and Information Review
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• 제14권3호
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• pp.253-280
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• 2012

Since China reformed and opened up itself, processing trade system has enormously contributed to chinese economic development and also become driving force of chinese economic growth. However, due to imbalance of industrial distribution, overproduction of labor-intensive product has expanded, and as a result, mass export of low-value-added products has aggravated trade friction. Also, these low-value-added products has caused environmental pollution and brought resource waste. On this, Chinese government start to modify system according to strategy for enhancement of processing trade. In this study, as a countermeasure of the Change of Chinese processing trade system, applicability of the bonded area is suggested. Firstly, even if a company's item is applied to prohibited or restricted items, the company can trade if through the bonded area. Secondly, even if a company has duty of deposit reservation, the company can be exempt from duty of deposit reservation if through the bonded area. Thirdly, as to importing facilities for processing trade, a company can receive more benefit through the bonded area than through outside of the bonded area.

• Journal of the Korean GEO-environmental Society
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• 제3권4호
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• pp.5-10
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• 2002

Pistia stratiotes(Water Lettuce) can be applied to remove inorganic pollutants from the wastewater for the advanced treatment. This study attempts to remove heavy metals from the secondary treated wastewater. Three different initial concentrations of heavy metals were applied as 0.5, 1.0 and 1.5 mg/L for Lead(Pb) and Chromium(Cr(VI)). In addition, the removal efficiency for the mixture of Lead and Chromium was also observed. The removal efficiency of Pb was in the range of 41.0~72.0% for Pb and it was in the range of 25.0~30.0% for Cr(VI) by Pistia stratiotes. The plants placed in static systems were able to remove the heavy metals in a few days of exposure. However, it was observed that the heavy metals affected produce phytotoxic effects on plants resulting in inhibition of chlorophyl synthesis, decrease in biomass production, and finally plant necrosis. The removal efficiencies of Pb and Cr(VI) by Pistia stratiotes were increased with plant growth.

• Journal of the Korean BIBLIA Society for library and Information Science
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• 제29권2호
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• pp.85-108
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• 2018

This study aimed to analyze media reports of the Comprehensive Library Advancement Plan using big data analysis in order to determine trends and implications by period. To do so, related data from 2009 to 2017 were collected from major domestic web portal sites. Words in the collected data were refined through the text mining process and frequency, centrality, and structural equivalence analyses were performed. Results confirmed that, during the implementation of the first and the second phases of the Comprehensive Library Advancement Plan, the focus of the library policy changed from external growth to strengthening internal stability and advancement of library operation, and the media coverage were limited to specific policies such as expansion of library facilities. Findings from this study will serve as useful material for ascertaining the approach to perceive and understand the national library policy represented by the Comprehensive Library Advancement Plan.

• KSCE Journal of Civil and Environmental Engineering Research
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• 제32권3D호
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• pp.189-196
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• 2012

South Korea has achieved economic development rapidly during last 50 years. However, such fast economic development with industrialization caused skyrocketing increase of automobiles. The increase of automobile has created various problems in the cities. Problems like traffic congestion and accident, environmental pollution, noise, and vibration have done human beings, who are the principal agents harm. They have made citizens understand how important Green transportation, especially pedestrian movement, is. Recently, installation of pedestrian facilities has been expanded. If walking facilities are incorrectly designed, they can create inconvenience, danger and the state of emergency due to the lack of safety and pleasant feelings. However, since the importance of the facility designs has been neglected due to the lack of understanding, it is hard to improve the facilities. Therefore, we need various studies of walking simulation in order to research the designs for pedestrians' safety and convenience. The objective of this study is to analyze the pedestrians' behavior and movement in a transfer subway station. The improvement of walking environment was made after chasing and analyzing the pedestrians' movement which is investigated in the actual field using SimWalk simulation program.

• Archives of design research
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• 제17권2호
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• pp.231-240
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• 2004

The present study approached conceptually the various problems which occurred in the living conditions during the modernization under the rapid growth drive and their solutions. It seems that the basis of the various problems which occurred in the highly informational and aged society lies in the discord of usability in the living conditions including the tools. It can be said that the secured social equity through the usability plays and important role in enhancing the quality of life of the prosumer, especially the elderly, by providing the self-confidence and the pleasure, and helping the smooth formation of the community The purpose of the present study was to find out the role of the design, as a professional field, on the various social pathological situation and the problems of the living conditions, and, especially, the role of the Universal Design on the desirable reorganization of the living conditions(the change of the living conditions through the community activation) which put the importance on the tool condition.

• Journal of Korean Society of Water and Wastewater
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• 제26권6호
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• pp.833-840
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• 2012

This study aimed to investigate growth rate and nutrient removal efficiency of Chlorella vulgaris according to nitrogen sources and frequency of pH adjustment. Nitrogen and phosphorus removal efficiencies were evaluated in the three different conditions using $NO_3{^-}$, $NH_4{^+}$ as a sole nitrogen source and mixed condition. Initial nutrient concentrations in artificial wastewater were 30 mg-N/L and 3 mg-P/L similar to secondary wastewater effluent. When nitrogen source was $NO_3{^-}$, there was no inhibition on the growth of C. vulgaris with adjusting pH every 24 hr while growth inhibition occurred with $NH_4{^+}$ caused by pH drop. N, P removal efficiencies were no significant depending on the nitrogen sources. As pH was adjusted to 7 by pH-stat, growth rate and nutrient removal efficiencies were increased compared to adjusting pH every 24 hr, however, growth rate and nutrient removal efficiencies were no significant depending on the nitrogen sources.