• Current Photovoltaic Research
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• v.9 no.1
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• pp.11-16
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• 2021

In the past, marine pollution caused by radioactivity and wastewater discharge caused mass destruction. As an alternative, the land farming system became common and operational. In recent years, safety and environmental problems caused by declining population due to aging of fishermen and underdeveloped facilities have always been lurking, so improvement is urgently needed. As part of the new renewable energy 3020 plan announced by the government in 2017, a new model was proposed to improve the environment as well as save energy when the roof of a water tank farm was remodeled into a solar power system. Study, when the existing roof was remodeled and replaced with a water tank farm in Busan as an empirical model, the energy saving rate was analyzed by comparing the actual electricity consumption and power generation.

• Journal of Families and Better Life
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• v.25 no.2 s.86
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• pp.23-36
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• 2007

Or this research, it was investigated the differences in the pro-environmental behaviors in purchase, use and management, and disposal of clothing by socio-demographic characteristics and other variables. In addition, it was classified Korean consumers into several comsumer groups based on the different purchase behavior style, and then investigated the difference among these consumer groups in purchase, use and management, and disposal of clothing in light of the pro-environmental behavior. The following is the summary of the main results. First, consumers with high income and ha41g a lot of clothing were less likely to purchase used-clothing while consumers who were non-married and in low-income status were more likely to rent clothing. In additions, female, married consumers, and consumers with less-educated were more likely to manage their clothing frequently. Second, it was classified consumers into several groups based on the different purchase behavior style, these were "rational purchasing", "saving-money purchasing", "regretting for their purchasing", and "over-purchasing". Third, "saving-money purchasing" group showed a high expenditure rate in the purchase of used-clothing but a low rate in "over-purchasing" group. The frequency of management of clothing was the highest in the group of "over-purchasing" and the next in the group of "saving-money purchasing". The group of "over-purchasing" were more likely to show irrational decision-making style, manage and disposal their clothing frequently, "saving-money purchasing" purchased used-clothing frequently, and the level of management of clothing were less in the group of "regretting for their purchasing".

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.6
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• pp.895-902
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• 2018

Energy consumption in buildings is close to 40% of the total national energy consumption in developed countries such as US and Japan, and Korea accounts for 24% of total energy consumption. In buildings, HVAC can't freely control the cooling flow rate according to the required calorie, so energy is not used efficiently. Therefore, by using the energy saving valve, the flow rate can be controlled by the required amount of heat and the energy can be saved. In this paper, we define basic conditions and develop control and monitoring boards for building energy saving valves based on PIC processor with low power and high cost-effectiveness. The designed board displays and transmits in real time information about two temperature values, flow values and calculated calories for temperature difference measurement. The developed board will be useful for real - time monitoring of the state of the valve in the future and development of the valve for the offshore.

• The KSFM Journal of Fluid Machinery
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• v.17 no.5
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• pp.83-88
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• 2014

Pumps are widely used in industrial plants, energy systems, ships etc. Generally they consume nearly 20% each nation's total electrical energy. The objective of this study is to find performance evaluating method for variable-speed drive pump. In order to evaluate the variable-speed pump performance energy saving rate for the variable-speed pump is applied and compared with that of constant-speed pump.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1993.10a
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• pp.1395-1404
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• 1993

Application of water-saving self-feeders can reduce water consumption of pigs by more than 50% . so the feeding-watering system one of the most important way of the reduction of the slurry. Bioactive deep litter housing can eliminate slurry. Matured urine, faeces and litter can use for the purposes of soil conditioning and fertilizing . Water-saving slurry handling technology can halve manure dilution so it can double the nutrient content of the slurry. By using of straw bale biofilter for reducing emissions of pig houses makes fattening of pigs possible close to populated area. Developed rate control system for slurry application make avoiding over-fertilization possible , can fulfill better the demand of nutrient of plants. By means of computer aided manure utilization system area distribution of soil characteristics can determinate . The system is suitable for planning the utilization of manure and slurry in environment -friendly way.

• 제어로봇시스템학회:학술대회논문집
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• 2002.10a
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• pp.63.5-63
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• 2002

In this paper, we are concerned with a maneuver detection algorithm which uses the 'lost' measurements down-sampled for computation load saving when a target is in quiescent motion. In general applications of estimation, measurements are available at a relatively high rate, while the estimation processing equipment can only operate at a lower sampling rate. Furthermore, when a target is in nearly quiescent motion, the update of the tracking filter need not to be implemented with maxim urn process power of the filter since the states of the target vary relatively slowly. This does not give serious degradation on the estimation performance. We consider the maneuver detection problem at the case...

• Journal of Environmental Science International
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• v.12 no.3
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• pp.359-366
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• 2003

Ecological society and energy conservative systems has become a subject of world wide attention. To examine the technologies of such systems as resource recycling society, this study is proposed for using rainwater as energy source and water resources in urban area. Useful informations for planning of utilizing rainfall as energy source, water resources, emergency water and controlling flood are discussed with model systems in urban area. It is calculated that the rate of utilizing rainwater, amounts of utilizing rainwater, substitution rate of supply water, amounts of overflow rainwater according to rain storage tank volume. By applying the past weather data, The optimum volume of rain water storage was calculated as 200m$^3$ which mean no benefits according to the increase of storage tank volumes. For optimum planing and control method at the model system, several running method of rainwater storage tank was calculated. The optimum operating method was the using weather data as 3hours weather forecast.

• Journal of the Korean Solar Energy Society
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• v.33 no.1
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• pp.48-56
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• 2013

Energy consumption analysis of multi-family apartment is an important area of research for the design of energy-saving housing. In this study, we selected a universal type of Flat-type apartments and analyzed the heating energy consumption of variables such as U-value, G-value, infiltration rate, heating setpoint and boiler efficiency with EnergyPlus and eQUEST. With these results, we identify the characteristics of EnergyPlus and eQUEST and provided base data for the design of energy-saving housing. The results indicate that infiltration rate is the most important factors to consider. And eQUEST heating energy consumption is approximately 10% higher compared to the EnergyPlus under same condition.

• Management & Information Systems Review
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• v.18
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• pp.1-19
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• 2006

Ageing induces huge dramatic change of society and economy rather than simple change of population structure. Ageing causes the decrease of working age population and production capable population, thus this brings growth slowness and long-term stagnation. In addition, progress in ageing decreases saving rate, consequently low saving rate brings about the decrease of country-wide investment resources. This ageing problem which is progressive rapidly needs core competence and implementation of human resource professionals to overcome this kind of environment change. First of all, it needs turnover in thinking way toward talents. Secondly, we need innovation one team to pursue innovation and creativity. Thirdly, it should be considered in a new way with the number of workers and efficiency of personnel expenses. Fourthly, employees should make effort for self-advancement. Under the environment with newly change human resource personnels' function and role should be emphasized to maintain sustainable growth and overcome the change of management environment. Therefore, human resources should be emphasized to become competitive personnel and organization with leading the change master and creating the value of the organization.

• Journal of the Society of Disaster Information
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• v.6 no.1
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• pp.62-76
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• 2010

Constructions of skyscrapers have been planned and are being performed in Korea, but the research on disaster preparedness and response is mainly focused on construction safety, fire prevention and response, and legal enforcement. So research on physical and psychological effect on human residents, methodology of increased survival rate and decreased disability rate is insufficient. Authors intended to identify the characteristics of skyscraper on human health and safety in disaster, to examine the basic influence of skyscraper on physical and psychological health and the way to decrease the negative effect on human survival.