• 한국신재생에너지학회:학술대회논문집
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• 2006.11a
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• pp.307-308
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• 2006

The national goal of wind energy dissemination has to be determined rationally based on technically available wind resource potential. For a reliable and scientific estimation or wind resource potential, a wind map is requisite. This paper presents the national wind map of Korea established by numerical wind simulation. Prediction accuracy of the low-resolution wind map is Improved by nudging QuikSCAT data and is validated by comparing with marine buoy beacon and met-mast measurements. Therefore, quantification of national wind resource potential is now possible and is anticipating to be utilized as a core index for policy and strategy building of wind energy dissemination and technology development.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2009.11a
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• pp.257-262
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• 2009

In green building certificated housing complex, although various planning factors in terms of 'Energy resource and Environmental impact' were adopted, the residents' consciousness for their economical and psycholgical effect has not been found. Therefore, the purpose of this study was to find out the usability of environment-friendly factors, with regard to the aspects of 'energy resource and environment impact' and residents, consciousness for them in order to provide the useful information to design the user-oriented green building house complex better than previous ones. the finding were summarized as follows: 1)Increasing awareness of 'green building certificated housing complex', Resident should feel contribution to the environment. 2)When mass housing planning, the development of sensible certification is required. 3)Green building certificated housing complex should change from 'certification for the Financial compensation' to 'certification for the Contribution to the environment'.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.12 no.11
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• pp.5357-5381
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• 2018

Cloud computing offers a wide range of on-demand resources over the internet. Utility-based resource allocation in cloud data centers significantly increases the number of cloud users. Heavy usage of cloud data center encounters many problems such as sacrificing system performance, increasing operational cost and high-energy consumption. Therefore, the result of the system damages the environment extremely due to heavy carbon (CO2) emission. However, dynamic allocation of energy-efficient resources in cloud data centers overcomes these problems. In this paper, we have proposed Energy and Service Level Agreement (SLA) Aware Resource Allocation Heuristic Algorithms. These algorithms are essential for reducing power consumption and SLA violation without diminishing the performance and Quality-of-Service (QoS) in cloud data centers. Our proposed model is organized as follows: a) SLA violation detection model is used to prevent Virtual Machines (VMs) from overloaded and underloaded host usage; b) for reducing power consumption of VMs, we have introduced Enhanced minPower and maxUtilization (EMPMU) VM migration policy; and c) efficient utilization of cloud resources and VM placement are achieved using SLA-aware Modified Best Fit Decreasing (MBFD) algorithm. We have validated our test results using CloudSim toolkit 3.0.3. Finally, experimental results have shown better resource utilization, reduced energy consumption and SLA violation in heterogeneous dynamic cloud environment.

• 한국신재생에너지학회:학술대회논문집
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• 2008.10a
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• pp.164-164
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• 2008

• 한국신재생에너지학회:학술대회논문집
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• 2008.10a
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• pp.165-165
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• 2008

• 한국신재생에너지학회:학술대회논문집
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• 2008.05a
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• pp.319-320
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• 2008

This paper introduces remote-sensing data which can be practically applied for offshore wind resource assessment. Development of offshore wind energy is inevitable for Korea to achieve the national dissemination target of renewable energy, i.e., 5% uptil 2010. However, the only available offshore in-situ measurement, marine buoy data would not represent areal wind characteristics. Consequently, remote-sensing technology has been started to apply to offshore wind resource assessment and is actively developing. Among them, NCAR/NCEP reanalysis dataset, QuikSCAT blended dataset, and offshore wind retrieval from SAR imagery are briefly summarized in this paper.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2004.02a
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• pp.143-149
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• 2004

China is facing the challenging problems in both the potential energy resource shortage and the serious environmental pollutions. The author suggests that nuclear energy could play an important role for ensuring the long term energy security in China. The technical problems to be solved for the sustainable development of nuclear energy in China are also discussed and the R&D work in next 20 years are briefly suggested to meet the requirements of nuclear energy development in China.

• Journal of the Korean institute of surface engineering
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• v.41 no.2
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• pp.51-56
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• 2008

Nonionic sorbitan monostearate have been successfully prepared by esterification using 1,4-sorbitan and stearic acid. 1,4-sorbitan were prepared using D-sorbitol and acid catalyst at solvent-free conditions. The synthesized surfactants were characterized by NMR and FT-IR. We also investigated the effect of temperature, pressure and catalyst on the synthesis of nonionic sorbitan monostearate. The yields of 1,4-sorbitan were 90% at $160^{\circ}C$ under 160 mmHg vacuum, and the yields of nonionic sorbitan monostearate were 92% at $230^{\circ}C$ under 60 mmHg vacuum.

• The KIPS Transactions:PartA
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• v.10A no.6
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• pp.757-768
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• 2003

Recently, the renewable energy resources play an important role as an energy resources of future due to an environmental pollution and lack of resources and so on. The development and diffusion of information systems related to renewable energy resources have been driven actively abroad. However, at domestic an efficient history management for renewable energy resource data and web retrieve service are not provided. Therefore, in this paper, we propose a history data management system for the renewable energy resources, which stores and manages vast history information of renewable energy resource data systematically. This system collects renewable energy resource data in the outside observation system and stores them in the history database. The stored Information is retrieved through the history query process and can be provided in various forms - table, graph, chart and counter line, etc. - on the internet. Especially, the proposed system manages the history data in real-time so the latest information is always provided to the users through the web interface.

• Journal of the Korean Geosynthetics Society
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• v.18 no.4
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• pp.53-61
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• 2019

It is well known there are a lot of undeveloped energy resource in the Arctic circle. As global warming enables the use of Arctic sea routes, the interest in Arctic resource development is increasing. Recently, polar neighbors and developed countries are actively promoting construction project in Arctic circle. However, the issue of environmental pollution caused by Arctic resource development has been raised. Today, environmental issues have a significant impact on the success of the project as well as on the costs of Arctic development projects. Therefore, it is necessary to secure a technology related to energy resource development and transportation for the Arctic resource project. In addition, the establishment of strategy for environmental impact assessment (EIA) is important. This paper shows the characteristics and procedures of EIA for developing Arctic resources, and reviews how to construct the systematically management of the necessary information. This system consists of a database required for environmental impact assessment and its application. The system is expected to be utilized for strategic development projects in the Arctic.