• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.38B no.7
• /
• pp.512-518
• /
• 2013

A resource allocation algorithm has a high impact on user satisfaction as well as the ability to accommodate and process services in a distributed cloud computing. In other words, service rejections, which occur when datacenters have no enough resources, degrade the user satisfaction level. Therefore, in this paper, we propose a resource allocation algorithm considering the cloud domain's remaining resources to minimize the number of service rejections. The resource allocation rate based on Q-Learning increases when the remaining resources are sufficient to allocate the maximum allocation rate otherwise and avoids the service rejection. To demonstrate, We compare the proposed algorithm with two previous works and show that the proposed algorithm has the smaller number of the service rejections.

• Journal of the Korea Society of Computer and Information
• /
• v.25 no.10
• /
• pp.125-133
• /
• 2020

In this paper, we design 4-layer TCP/IP that utilizes minimal memory and processor resources in Internet of Things(IoT) systems. The TCP/IP designed in this paper has the following characteristics. First, memory resource is minimized by using minimal memory allocation. Second, processor resource is minimized by using minimal memory copy. Third, the execution time of the TCP/IP can be completed in a deterministic time. Fourth, there is no memory leak problem. The standard in minimal resources for memory and processor derived in this paper can be used to check whether the network subsystems of the already implemented IoT systems are efficiently implemented. As the result of measuring the amount of memory allocation and copy of the network subsystem of Zephyr, an open source IoT kernel recently released by the Linux Foundation, we found that it was bigger than the standard in minimal resources derived in this paper. The network subsystem of Zephyr was improved according to the design proposed in this paper, confirming that the amount of memory allocation and copy were decreased by about 39% and 67%, respectively, and the execution time was also reduced by about 28%.

• Monthly Korean Chicken
• /
• v.17 no.5
• /
• pp.94-96
• /
• 2011

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2012.01a
• /
• pp.5-6
• /
• 2012

본 논문에서는 가상머신에서 수행되는 어플리케이션의 서비스 품질을 보장하고, 클라우드 클러스터의 운영비용을 절감시킬 수 있는 자원 할당 감축기법을 제안한다. 이 기법은 가상머신의 자원 사용량 변화 추세를 분석하고 이를 토대로 확률적인 접근을 사용하여 새로운 자원 할당 감축량을 결정한다. 가상머신의 자원 사용량이 할당량을 초과하면 가상머신의 이주가 필요하다. 이때 발생하는 다운타임동안 가상머신의 어플리케이션은 서비스를 수행할 수 없기 때문에 클라우드 시스템의 성능이 저하된다. 따라서 성능평가에서는 가상머신의 자원 사용량이 할당량을 초과하는 횟수를 측정하여 Greedy 기법과 비교 평가함으로써 제안한 기법이 자원 할당 감축에 우수함을 검증한다.

• Journal of Energy Engineering
• /
• v.16 no.1 s.49
• /
• pp.15-21
• /
• 2007

In order to solve problems of global warming, many policies and measures has been implemented in various countries. In January 2005, the European Union Emission Trading Scheme officially started. In order to take it into action, the EU ETS stated that all members must submit the national allocation plan including the national's total allowances, allowances for installations, reserve for new entrants, etc. In the process of this decision-making, it was also stated that problems related with early action should be solved by each member state at its option. This paper is a study on necessity of compensation for early action and its limitation of its practices. With a comparative study on dealing with early action in the key nations including Germany, the Netherlands and United Kingdom, we can get insights and strategies for effective processes of dealing with early action and the direction for harmonizing data collection and allocation rules.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.20 no.3
• /
• pp.576-586
• /
• 2019

Airlines need to reduce their greenhouse gas (GHG) emissions because of the Paris Climate Agreement and ICAO CORSIA. This examined the degree of the strategic responses to which the airlines have made and the problems in the emission trading system (ETS). According to the analysis, the total amount of emission all the airlines made in the last three years was 116% more than the emission allowance imposed by the central government resulting in 10.7 billion KRW additional emission expense. Airlines would also face an increased carbon cost due to the implementation of ICAO CORSIA by purchasing an additional paid-in emission allowance in international routes. Although it is effective to retire the old aircraft early and induce the brand-new fuel-efficient aircraft to reduce GHG emissions, it is impractical in the short-term due to the tremendous amount of investment. To reduce the emission, airlines are washing engines, using ultra-light ULD and carts in the cabin, increasing the use of flaps and preventing the use of APU. On the other hand, these are very limited measures for reducing emissions according to the ICAO's mandatory emission target.

• Korea Petroleum Association Journal
• /
• no.7 s.65
• /
• pp.35-51
• /
• 1986

지난 6월 25일부터 유고슬라비아의 브리오니섬에서 열린 OPEC총회는 유가안정을 위한 산유할당량 합의에 실패한 채 30일 폐막되었다. 앞으로 국제석유시장은 당분간 약세가 계속될 것으로 보인다. 이 자료는 최근 일본경제신간에 연재된 석유정세에 대한 분석 내용을 옮긴 것이다. <편집자 주>

• Korean Chemical Engineering Research
• /
• v.60 no.4
• /
• pp.478-485
• /
• 2022

The certification performance issued through an external business is sold to companies subject to the emission trading system allocation, and the company subject to the allocation can secure the quota by converting the purchased external business certification performance into offset credits. In this methodology, when fossil fuels that used existing oil boilers (by oil type) were replaced with boilers using propane gas with a relatively low carbon content, the amount of carbon dioxide emission reduction by oil type was recognized. As an initial analysis to make up for the insufficient quota of large corporations, the amount of carbon reduction emissions and emission rights trading was calculated.

• Environmental and Resource Economics Review
• /
• v.25 no.3
• /
• pp.377-401
• /
• 2016

This study analyzes how much cost the power generation and energy sector in South Korea have to bear due to the introduction of emissions trading scheme during 2016 - 2017. To this end, the data on the seventh basic plan for long-term electricity supply and demand is applied to the electricity market simulation model called M-Core, and then the model forecasts carbon dioxide emissions to compare with the free emission allowances in the first national emissions permit allocation plan. The main results are as follows. Carbon dioxide emissions are estimated to be less in 2016 but more than the free emission allowances in 2017. When the price of the allowances is changed from \10,000/ton to \20,000/ton, the cost of purchasing the allowances is ranged from \70 billion to \140 billion. Under the assumption that CO2 cost is incorporated into the variable cost, a reversal of merit order between coal and LNG generation takes place when the price of the allowances exceeds \80,000/ton.

• Bulletin of Korea Environmental Preservation Association
• /
• s.413
• /
• pp.14-17
• /
• 2014

배출권거래제가 내년 1월부터 시행될 예정이다. 이에 기업들은 실제 온실가스 배출증가 추세와 신 증설 시설 투자계획 등을 고려한 현실적인 할당이 이루어지길 원하며 정부는 국가 감축목표 달성이 가능하도록 할당량을 결정하고자 한다. 온실가스 감축목표는 다양한 정책의 종합결과물로서 에너지정책, 산업발전정책, 온실가스 감촉기술발전 추이 등이 종합적으로 고려되어야 한다. 배출권거래제의 안정적 운영과 지속적인 경제성장을 담보하기 위해서라도 환경보전과 산업경쟁력을 동시에 고려하는 합리적 대안이 마련되기를 희망해 본다.