• 대한임베디드공학회논문지
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• 제5권1호
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• pp.18-22
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• 2010

In real-time embedded systems, the responsibility is the most important thing because it is related to human life. Context switching is a part of which can slow down the responsibility. We therefore should minimize the amount of state that needs to be saved during context switching. In this paper, we introduce a new architecture (Register Farm) for context switching which can exchange two contexts in one cycle time. Although it might increase the cost of MCU design and the complexity of circuit, it cannot miss any interrupt during context switching. Consequently, Register Farm architecture can make embedded systems spread out in human life because it can increase reliability and responsibility in real time embedded systems.

• 농업과학연구
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• 제30권2호
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• pp.191-198
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• 2003

This paper aims at being informed on how farms should invest resources to advertise their homepages on the internet. The number of visitors to homepage was used for analyzing the effect of advertising homepages of farmers conducting e-business. The results of analysis are as follows; (1) The daily number of visitors that has viewed homepages was 55 on average, (2) 48% of visitors came to farm homepages via search engine, which was the highest rate among accessible routes to homepage. Therefore, it was suggested that farmers should register their homepages on major search engines such as yahoo.co.kr, naver.com and daum.net in order to promote the effect of advertising homepage. We recommend that farmers should enlist the name of agricultural products on the first page of search engine view because people tend to use key word(92%) rather than homepage name(8%) when they would like to search wanted products on the internet.

• Journal of information and communication convergence engineering
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• 제11권2호
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• pp.112-117
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• 2013

In order to reuse a register transfer level (RTL)-based IP block, it takes another architectural exploration in which the RTL will be put, and it also takes virtual platforms to develop the driver and applications software. Due to the increasing demands of new technology, the hardware and software complexity of organizing embedded systems is growing rapidly. Accordingly, the traditional design methodology cannot stand up forever to designing complex devices. In this paper, I introduce an electronic system level (ESL)-based approach to designing complex hardware with a derivative of SystemVerilog. I adopted the concept of reuse with higher levels of abstraction of the ESL language than traditional HDLs to design multiplication server farms. Using the concept of ESL, I successfully implemented server farms as well as a test bench in one simulation environment. It would have cost a number of Verilog/C simulations if I had followed the traditional way, which would have required much more time and effort.

• Asian-Australasian Journal of Animal Sciences
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• 제13권9호
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• pp.1189-1192
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• 2000

The experiment was conducted on 69 cows to identify the quantitative variations of some economic traits of five genetic groups as $Local{\times}Friesian $ $F_1$, $Local{\times}Sahiwal$ $F_1$, Local (indigenous zebu type), $Local{\times}Sindhi $ $F_1$, and $Local{\times}Hariana$ $F_1$. The traits studied were age at weaning, age at first heat, age at first conception, services per conception, daily milk yield, lactation length, lactation yield and post partum heat period. The records on milking and reproduction performances of cows and heifers were obtained from farm register and by interviewing the farmers. It was observed that the lowest age at weaning, age at first heat and age at first conception were $5.37{\pm}0.24$, $27.17{\pm}1.72$ and $27.83{\pm}1.82$ months respectively in $Local{\times}Hariana$ $F_1$. Services per conception were lowest in $Local{\times}Sahiwal$ $F_1$ $(1.08{\pm}0.18)$ although not significantly (p>0.05) affected by farms, genetic groups and $farm{\times}genetic$ groups interaction. Average daily milk yield was highest in $Local{\times}Friesian$ $F_1$ $(5.81 {\pm}0.40 kg)$. Lactation length and lactation yield were highest in $Local{\times}Sahiwal$ $F_1$ ($299.38{\times}9.74$ days and $1863.00{\pm}141.00kg $ respectively). Average post partum heat period was lowest in $Local{\times}Sindhi$ $F_1$ ($3.19{\pm}0.38$ months). Least squares ANOVA showed that farm had significant (p<0.001) effect on age at weaning, age at first heat, age at first conception and post partum heat period. There was insignificant (p>0.05) effect of farm on services per conception, daily milk yield, lactation length and lactation yield, whereas genetic groups had a significant effect for all the traits under review except services per conception. $Farm{\times}genetic$ groups interaction was insignificant for all of the traits under consideration except age at weaning.

• 대한기계학회논문집B
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• 제40권4호
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• pp.201-212
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• 2016

부산지역 가덕도 일대에 30MW 규모의 육상 풍력발전단지개발을 위한 풍황자원분석과 풍력터빈 최적배치를 수행하였다. 후보지역에 설치되어 운용중인 AWS(KMA)에서 측정된 바람 데이터를 이용하였으며, 데이터 품질분석을 통한 신뢰성 검토를 수행하였다. 1년간 측정된 AWS 데이터는 MERRA 재해석 데이터와 선형희귀(Linear regression method) MCP 기법의 적용을 통해 30년으로 장기 보정되었고, 이를 이용한 풍력터빈 최적배치를 수행하였다. 3MW 풍력터빈을 적용하여 총 25 조건의 풍력터빈 배치에 대한 최적배치를 수행하였으며, 다양한 후류모델을 적용하여 발전량해석을 수행하였다. 단지효율은 97.6%~98.7%, 연간이용률은 37.9%~38.3%로 예측되었고, 후류영향이 고려된 연간발전량이 99,598.4 MWh~100,732.9 MWh로 예측됨에 따라, 우수한 경제성을 갖는 풍력발전단지개발이 가능한 지역임을 확인하였다.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.204-212
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• 2022

Recently, the Korean government has been actively promoting the smart city as their strategic agenda. However, to build smart cities that are greener, the authors believe it is essential to rapidly transit conventional energy sources such as fossil fuels to renewable energy. Although there is a big potential for Offshore wind in Korea, there has not been a full-scale commercial offshore wind farm until today. Since Korea is relatively a new market compared to the EU, it can be risky for developers. The authors will introduce risk management best practices in the offshore wind industry applicable to the Korean environment. This paper will mainly introduce an offshore wind project size of 99 MW. The project is expecting a Finance Close (FC) in Q3 2022, so the project team has prepared a risk register with over 150 risks and levers throughout the project lifecycle. Overall risks include risks with Development Expenditure (DEVEX) impact, a Capital Expenditure (CAPEX) impact, and an Operating Expenditure (OPEX) impact. Based on the identified risks, a more qualitative assessment of Cost and Schedule Impact was conducted. In conclusion, a Monte Carlo simulation was performed to propose a quantitative risk assessment to evaluate a benchmark contingency of the project cost.

• 한국컴퓨터정보학회논문지
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• 제20권4호
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• pp.131-138
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• 2015

구매자와의 관계지속을 위한 관계 확산형 비즈니스 모델의 가장 큰 특징은 한번이라도 물품을 구매한 고객은 SNS(Social Networking Service)의 팔로우(Follow) 기능을 이용하여 자동으로 단골고객으로 등록하여, 구매자와 생산자와의 관계가 일회성에 그치지 않고 향후에도 지속될 수 있게 하여 잠재고객이 되고, 장기적으로 재구매가 이루어지게 한다. 단골이 된 고객에게 생산자는 신상품 출하 시 객관적인 물품정보 외에 재배하는 동안의 농장 모습이나 농작물의 성장과정 등 생생한 근황과, 파종에서 수확까지의 숨겨진 이야기를 통해 자신이 농사지으며 전원생활을 하는듯한 감성을 자극한다. 또한, 생산자는 저장법이나 요리법 등의 다양한 사용법을 안내하며 새로운 물품을 추천하거나 홍보를 할 수 있다. 이러한 장점은 기존의 전자상거래에서 상품의 판매와 홍보가 분리되어 링크를 통해 외부로 연결되어야 하는 문제에서 벗어나 판매와 홍보가 하나의 계정 안에서 수행하도록 하여 사이트 접근성을 높여준다. 또한 구매자간에도 상품을 추천하고 소식을 확산하게 하여 구매자는 구매한 상품에 대한 구매경험을 공유하고, 추천, 구매후기 작성 및 기존 구매후기를 재배포하여 서로 알지 못하던 구매자 사이의 소통을 가능하게 한다는 것이다.

• 한국방재안전학회논문집
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• 제16권1호
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• pp.23-35
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• 2023

최근 기후변화로 인한 태풍, 국지성 집중호우 등 자연재해에 의한 피해가 급증하면서 행정안전부에서는 ｢소규모 공공시설 안전관리 등에 관한 법률(2016 개정)｣을 제정하고 각 지자체별로 소규모 공공시설을 조사하여 국가재난안전관리시스템(NDMS)에 등록하고 매년 3월 31일까지 안전점검을 실시하고 있다. 이를 위해 최근 각 지자체별로 소규모 공공시설 안전점검 및 정비계획 수립 용역이 발주되어 세천, 소교량, 농로, 마을진입로, 취입보, 낙차공의 6가지 유형의 시설물을 조사하여 DB화 하고, 각 시설물별 위험도 평가를 수행하여 위험시설의 경우 정비계획을 수립하고 있다. 그러나 현재까지 배포된 소규모 공공시설의 위험도 평가 방법은 현장조사자의 육안조사를 통해 이루어지고 있으므로, 위험도 평가가 주관적이고 모호한 형태로 이루어지고 있는 실정이다. 이에 본 연구에서는 소규모 공공시설 중 재해위험도가 가장 높은 세천에 대하여 위험도 정량평가지표를 제시함으로써 합리적이고 정량적인 위험도 평가가 이루어질 수 있도록 하였으며, 이를 통해 소규모 위험시설을 선정하여 정비계획 및 시행계획 수립에 있어 투명한 근거자료를 확보할 수 있도록 하였다.