AC2BS합금의 열간 균열강도 및 인장특성에 미치는 스크랩 함량의 영향

권용호 ( Yong Ho Kwon ),김헌주 ( Heon Joo Kim ) 한국주조공학회 2016 한국주조공학회지 Vol.36 No.2

The effects of scrap content on the hot tearing property and tensile property were investigated in AC2BS alloy. The hot tearing strengths were 16.4 kgf/cm2, 15.2 kgf/cm2, 14.9 kgf/cm2 and 13.3 kgf/cm2, respectively, under the constant solid fraction of 29.3% when the scrap contents of the specimens were 0%, 20%, 35% and 50%. In the same way, tensile strengths of the as-cast condition were 24.5 kgf/mm2, 23.7 kgf/mm2, 17.3 kgf/mm2 and 16.0 kgf/mm2, respectively, and the corresponding tensile strengths of the T6 heat treatment condition were 27.2 kgf/mm2, 26.7 kgf/mm2, 24.2 kgf/mm2 and 23.9 kgf/mm2. Hot tearing strength and tensile strength decreased as scrap content of the specimen increased. According to the evaluation of the quantitative hot tearing and tensile test results, the decrease of these strengths is due to the presence of oxide films which act as crack initiation site of the specimens. Therefore, elimination of oxide films of aluminum melt to maintain melt cleanliness is required.

송원남희궁조고론 ( 宋元南戱宮調考論 )

권용호 ( Yong Ho Kwon ) 한국중국희곡학회 2000 중국희곡 Vol.8 No.1

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화학물질 사이버감시단 활동 사례 분석을 통해 본 인터넷상 화학물질 불법ㆍ유해정보 관리전략의 필요성

권용호(Yong Ho Kwon),조문식(Mun Sik Cho),김민정(Min Jung Kim),안성용(Sung Young Ahn),김기준(Ki Joon Kim),윤준헌(Junheon Yoon) 한국위험물학회 2013 한국위험물학회지 Vol.1 No.2

The Internet is a great pool of information. The most of IED(Improvised explosive device) was manufactured based on the internet information and online illegal trade of raw materials. That is the reason that the government has to strengthen the internet surveillance. The Ministry of Environment established volunteer monitoring system which was consisted of 20 civilians. During 1 year term, they reported 437 suspicious sites and 51 sites were closed down by the authority. Illegal and hazard contents were used private homepage, company website, portal services and illegal homepage. Free board and blog are the favorable forms in illegal site. The most of them served the information about illegal trade of chemicals and IED manufacture methods. The volunteer monitoring system is a kind of voluntary service rather than official organization. So they have a lot of limitations. For the stable surveillance system, the mid and long term plan for sound management of illegal online information were needed.

u-City 건설사업 시나리오에 따른 건설기업의 대응전략 수립에 관한 연구

권용호,하희윤,유병기,김재준,Kwon, Yong-Ho,Ha, Hee-Yoon,Yoo, Byeong-Gi,Kim, Jae-Jun 한국건설관리학회 2007 건설관리 : 한국건설관리학회 학회지 Vol.8 No.2

u-City건설사업은 최근 건설사업이 창출할 수 있는 새로운 부가가치 영역으로서, 건설기업이 신시장을 개척하기 위해 적극적으로 도전해야 될 분야로 주목받고 있다. 하지만, 건설기업의 입장에서는 u-City건설시장의 주도권을 IT업계에서 선점하고 있으며, 관련 연구 개발이 IT분야의 주도로 추진되고 있다는 점 때문에 u-City 건설시장에 선뜻 참여하지 못하고 있다. 따라서 본 연구에서는 u-City 건설사업과 관련하여 제기되고 있는 불확실성 요인들을 개요화하고 각 불확실성 변수별로 그 방향성을 분석하여 개연성 있는 시나리오를 도출하였고, 이를 기반으로 각각의 시나리오 상황에 대응하기 위한 건설기업의 전략적 방향을 제시하였다. 이를 통하여 건설기업의 시장분석 및 전략수립의 기초자료로 활용할 수 있게 하며 결과적으로 u-City 건설사업에의 건설기 업의 참여를 유도하고자 한다. The u-City construction project has become a hot topic In the construction market because it seems economic value-added field for construction firms. However, construction firms don't willingly participate in the u-City construction market because the future business environments for the u-City are very uncertain. Scenario planning is a very powerful method in managing this complex planning situation and is based on scenarios that help each enterprise appropriately adapt itself to its own business environments. Therefore it Is based on the main principles of systems thinking and multiple futures. For the purpose of dealing with such uncertainties, this paper attempts to develop the possible market scenarios of the u-City construction market through a scenario planning approach. From this perspective, we considered various aspects of the u-City construction such as market demands, technology development, policy level and management environment. After considering the relevant issues, we identified the main trends and key uncertainties. Then, we developed three coherent u-City construction market scenarios. On the basis of the proposed scenarios, the business strategies of potential construction firms in the u-City construction market has been formulated. Therefore, construction firms can use these scenarios as a basic data for market analysis and business strategy. Therefore, this paper is able to enhance the participation of construction firms in the u-City construction market.

이산 웨이블릿 변환을 이용한 지문의 계층적 분류

권용호,이정문,Kwon, Yong-Ho,Lee, Jung-Moon 강원대학교 산업기술연구소 1999 産業技術硏究 Vol.19 No.-

An efficient method is developed for classifying fingerprint data based on 2-D discrete wavelet transform. Fingerprint data is first converted to a binary image. Then a multi-level 2-D wavelet transform is performed. Vertical and horizontal subbands of the transformed data show typical energy distribution patterns relevant to the fingerprint categories. The proposed method with moderate level of wavelet transform is successful in classifying fingerprints into 5 different types. Finer classification is possible by higher frequency subbands and closer analysis of energy distribution.

On the Analysis of Integrated Production and Transportation Planning in a Supply Chain

Soo Tae Kwon(권수태),Yong Ho Eom(엄용호) 한국SCM학회 2006 한국SCM학회지 Vol.6 No.1

경제성을 고려한 열교환기 제거방법에 관한 실용적 연구

양판석(Panseok Yang),서석호(Seok-Ho Seo),오시덕(Si-Deok Oh),권용호(Yong-Ho Kwon) 대한설비공학회 2002 대한설비공학회 학술발표대회논문집 Vol.2002 No.-

CGAM 열병합발전 시스템의 비용구조

양협(Hyup Yang),변기택(Gi-Taek Byun),권용호(Yong-Ho Kwon),곽호영(Ho-Young Kwak) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5

The cost structure of the CGAM system, a predefined cogeneration system suggested to unify the different<br/> methodologies of thermoeconomic analysis, was investigated by using a thermoeconomic method called<br/> MOPSA(Modified Productive Structure Analysis). An emphasis has been specially put on how the cost<br/> structure of the system is affected by the chosen level of aggregation that specifies the subsystems. It has<br/> been found that the unit cost of products is dependent on the chosen level of aggregation of the system only<br/> when one consider the negentropy flow as one of the parameters to determine the unit cost of products.

제주도 안덕계곡에 분포하는 식물의 생활형에 관한 연구

최영은 ( Choi Young-eun ),김창환 ( Kim Chang-hwan ),권용호 ( Kwon Yong-ho ),두하은 ( Doo Ha-eun ) 한국도서(섬)학회 2018 韓國島嶼硏究 Vol.30 No.2

제주도 남제주군 안덕계곡에 분포하는 식물의 생활형 분석을 위해 생활형을 휴면형, 지하기관형, 산포기관형의 3개 유형으로 세분하여 분석하였다. 휴면형은 조사된 420종 중에서 지상식물이 87종, 20.71%로 가장 많은 식물이 분포하고 있으며, 반지중식물, 일년생식물이 각각 79종, 18.81%와 75종, 17.86%로 비슷한 분포비율을 보였다. 또한 지중식물이 66종, 15.71%, 미소지상식물이 54종, 12.86%로 비교적 많은 종이 분포하고 있었다. 지상식물이 분포하고 있는 곳의 하층식생은 상록관목들이 자라고 있기 때문에 미소지상식물의 분포비율도 비교적 높게 나타났다. 일년생식물은 인위적 교란과 훼손지역 내에 침투한 외래종 등으로 구성되어 있어 인간의 활동 등이 영향을 미친 것으로 보인다. 착생식물과 수생식물 분포는 안덕계곡의 지형적 특징인 다양한 계곡 암벽의 모양 등이 반영된 결과이다. 수생식물은 안덕계곡의 하천길이가 길고 유량이 풍부하여 수계의 발달이 잘 되어있기 때문에 비교적 많은 수의 수생식물이 분포하였다. 1995년, 2004년, 2017년에 조사된 식물의 휴면형 분포비율을 보면 각각의 휴면형 유형의 종수는 증가했으나 휴면형 유형의 분포비율은 거의 유사한 비율을 보였다. 이것은 안덕계곡의 기후적 조건뿐만 아니라 지형적 조건이 크게 영향을 미친 결과로 보인다. 지하기관형은 단립식물(R5)의 비율이 236종, 56.19%로서 많은 종이 단립식물의 지하기관형을 가지고 있었다. R3유형은 58종 13.81%, R4는 32종 7.62%의 비율을 보였다. 인경, 구경, 괴경, 괴근을 갖는 유형과 근경이 지하로 수직으로 벋는 유형은 분포비율이 매우 낮았으나 다육근은 14종으로서 비교적 많은 수의 식물이 분포하였다. 이러한 현상은 안덕계곡의 하상과 곡벽의 용암류로 이루어진 암반 및 주상절리의 지형조건이 이들 유형의 식물 서식조건과 관련이 있는 것으로 보인다. 산포기관형은 중력산포형이 168종, 40%로서 가장 많이 분포하고 있었다. 그 다음으로는 풍수산포형이 93종, 22.43%, 동물산포형이 91종, 21.67%의 분포비율을 보였다. 동물산포형, 풍수산포형 등의 분포비율은 지역적 특성 및 지리·지형적 특성을 반영하고 있는데 안덕계곡의 수직절벽이 계곡의 양안을 이루는 계곡의 특성이 영향을 미친 것으로 보인다. This research was conducted to analyze plant life forms of Andeok valley in Nam Jeju-gun(county) of Jeju Island by dividing the life forms into three categories:dormancy form, radicoid form, and disseminule form. Of the total 420 species surveyed, phanerophytes (P) of dormancy form were most prevalent as 87 taxa or 20.71% followed by hemicryptophytes (H) and therophytes (Th) with 79 taxa or 18.81% and 75 taxa or17.86%, respectively. In addition, geophytes (G) and nanophnerophytes (N) were relatively abundant with 66 taxa (15.71%) and 54 taxa (12.86%) respectively. Since evergreen shrub grows on the understory vegetation where P is distributed, the distribution of N was observed to have a fairly high proportion. Th is composed of species, which are introduced by anthropogenic disturbance and alien species invaded. In this context, human activities might affect the distribution of Th. The distribution ratio of chamaephytes (Ch) and hydatophytes (HH) reflects the geographical characteristics of Andeok valley, which has various shapes of cliffs. As the river length of Andeok valley is long and its stream flow is plentiful, a relatively large number of HH were distributed in the valley. As for the distribution of the plants surveyed in 1995, 2004, and 2017, the number of species of dormancy forms has been increased, while its distribution rate has shown asimilar proportion. This might be significantly influenced by both climate conditions and topographical features. Of propagation forms, R5(non-clonal growth) of radicoid from was predominant as 236 taxa (56.19%), followed by R3 (rthizomatous plants) and R4 (stoloniferous plants) with 58 taxa (13.81%) and 32 taxa (7.62%), respectively. Unlike the percentage of root types, which are bulb, corm, tuber and tuberous root, a fleshy root has a wide variety of plant species with 14 taxa. In terms of disseminule form, D4 (only by gravity) including 168 taxa (40%) was predominant, followed by D1 (disseminated by wind and water) including 93 taxa (22.43%) and D2 (by animals and man) containing 91 taxa (21.67%). The proportion of D1 and D2 reflects regional characteristics and geographical and geomorphological properties, which were influenced by a deep ravine of Andeok valley.

6시그마 달성을 위한 통계적 도구

고왕경 ( Wang Kyung Ko ),황규현 ( Kyu Hyun Hwang ),박종미 ( Jong Mi Park ),권용호 ( Yong Ho Kwon ) 안양대학교 福祉行政硏究所 2007 福祉行政硏究 Vol.23 No.-