• 한국산학기술학회논문지
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• 제15권5호
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• pp.3213-3219
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• 2014

현재 도시화로 급증하는 온실가스는 기후변화에 커다란 영향을 미치고 있다. 이로 인해, 정부에서는 기후변화의 예방을 위하여 산소를 발생시키고 이산화탄소를 저감시키는 수목을 활용하는 다양한 방안을 모색하고 있다. 수목의 이산화탄소 저감량을 산정하기 위해서 개별 수목에 대한 정보를 추출하는 것이 필수적이다. 항공 라이다 자료는 지상의 건물 뿐만 아니라 수목에 대한 3차원 정보를 점군형태로 가지고 있다. 본 연구에서는 항공라이다 자료를 이용하여 개별 수목을 추출하는 자동화 모델을 개발하였다. 이를 위해, 수목을 추출하기 위한 방법론을 설정하고 그것을 모델로 개발하는 과정으로 진행되었으며 자동화된 모델은 ArcGIS의 모델빌더를 기반으로 하였다. 개발된 모델의 적용성을 평가하기 위해서 용인시를 대상으로 상업용 소프트웨어와 비교하였다. 실험결과 본 연구에서 개발한 자동화 모델의 추출율이 9.91% 높은 것으로 확인되었으며 상대적으로 수목추출이 효과적이라는 것을 확인할 수 있었다.

• Current Research on Agriculture and Life Sciences
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• 제2권
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• pp.42-55
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• 1984

The direction of scientific researches on tree improvement and forest management in several universities and research institutes in Japan can be summarized as follows: They put a great emphasis on sugi, Cryptomeria japonica and cypress, Chamaecyparus oblusa which are two major conifer species largerly planted in the Japanese forestry. In the research of sugi, a great concern has been made in evaluating inheritance of forest tree, quantitative characters and genetic parameter of growth, and in breeding for resistance to diseases and insects and to all the natural calamities. Interaction between environmental conditions and genetic nature of tree can be concerned factors in relation with forest damage, together with silvicultural conditions and pest infestation. Selfing hybrids of $F_1$ made from crossing twisted-leaf sugi, defomity leaf type and midori sugi, normal leaf type segregated the normal needle, twisted needle, green leaf and albino leaf type. It seemed that separation of many defomity individuals can be governed by two dominant complementary genes and from the near loci of which it was detected lethal genes. 52% of Japanese forestry is occupied by the small forest landowners like Korean forestry. This made difficulty for forest improvement such as progressive afforestation and for capital accumulation form forestry. The Forest Corporation was established at first in 1959 to aming at productive forestry structure and forest management, and afforestation. For these purpose, 35 Forest Corporations are at moment operating throughout Japan. However, investment in forestry business becomes less attractive since the wage in forest production duction increased in higher trend. than timber price. Therefore, an artifical afforestation becomes yearly decreased. At present. the self-sufficient rate of timber production in Japan is about 35%, and so a great effort is being made to increase self-sufficient rate of timber production.

• 한국전자통신학회논문지
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• 제19권2호
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• pp.409-416
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• 2024

빠른 고속 데이터 신호 처리 및 논리 연산을 위한 부동 소수점 연산 요구 사항이 확대됨에 따라 부동 소수점 연산 장치의 속도는 시스템 작동에 영향을 미치는 핵심 요소이다. 본 논문에서는 다양한 부동소수점 곱셈기 방식의 성능 특성을 연구하고, 캐리와 합의 형태로 부분 곱을 압축한 다음, 최종 결과를 얻기 위해 캐리 미리 보기 가산기를 사용한다. Intel Quartus II CAD 툴을 이용하여 Verilog HDL로 부동소수점 곱셈기를 기술하고 성능 평가를 하였다. 설계된 부동소수점 곱셈기는 면적, 속도 및 전력 소비에 대해 분석 및 비교하였다. 월러스 트리를 사용한 수정 부스 인코딩 방식의 FMAX는 33.96Mhz로 부스 인코딩보다 2.04배, 수정 부스 인코딩보다 1.62배, 월러스 트리를 사용한 부스 인코딩보다 1.04배 빠르다. 또한, 수정 부스 인코딩에 비해 월러스 트리를 이용한 수정 부스 인코딩 방식의 면적은 24.88% 감소하고, 전력소모도 2.5% 감소하였다.

• 한국식품영양학회지
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• 제25권3호
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• pp.430-435
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• 2012

본 연구에서는 지역별 옻나무 껍질의 총 폴리테놀 함량, 플라보노이드 함량, 항산화능과 우루시올 함량을 측정하고, 옻나무 피를 첨가한 옻닭 국물의 관능검사를 실시하였다. 원주산 옻나무 껍질의 total polyphenol, flavonoids, DPPH free radical 소거능, ABTS radical scavenging activity 등이 함양산 및 중국산에 비해 높은 수치를 나타내었다. Urushiol 함량은 함양산이 $4.59{\pm}0.04$ ppm으로 가장 높은 함량을 나타내었지만, 중국산 옻나무 껍질에서는 검출되지 않았다. 옻나무 껍질을 첨가한 옻닭 국물의 관능검사에서는 원주산을 첨가한 옻닭국물의 선호도가 가장 높은 것으로 나타났다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국내학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.374-379
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• 1988

We propose a framework for modelling and operation management of robotic assembly cells via knowledge base. In the framework, each component of the cell is considered as a state variable, the relations among the state variables are stored in state transition maps(STMs) and then transformed into the form of knowledge. The assembly job tree(AJT) which includes the precedence relations and the constraints for assembly tasks is also described. Finally, an algorithm is presented to manage the cell operation.

• Journal of applied mathematics & informatics
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• 제30권5_6호
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• pp.993-1003
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• 2012

The family of graphs $\hat{W}_{4n}$ is defined by taking the simple whee graph $W_{n+1}$ with $n$ rim vertices and then adding three extra vertices on every rim edge of the wheel. In this paper, the critical group of this whole family of graphs is investigated.

• 전자공학회논문지A
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• 제30A권6호
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• pp.58-65
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• 1993

In this research, we developed a new algorithm for hierarchical placement of integrated circuits. For efficient placement of a large circuit, the given circuit is recursively partitioned to form a hierarchy tree and then simulated-annealing-based placement method is applied at each level of the hierarchy to find a near optimum solution. During the placemtnt, global optimization is performed at high levels of the hierarchy and local optimization is performed at low levels. When compared with conventional placement methods, the new hierarchical placement method produced favorable results.

• KIEAE Journal
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• 제3권2호
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• pp.59-66
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• 2003

To be the design method supporting aesthetic ability of human, CAAD system should essentially recognize architectural form in the same way of human. In this study, visual perception process of human was analyzed to search proper computational method performing similar step of perception of it. Through the analysis of visual perception, vision was separated to low-level vision and high-level vision. Edge detection and neural network were selected to model after low-level vision and high-level vision. The 24 images of building, tree and landscape were processed by edge detection and trained by neural network. And 24 new images were used to test trained network. The test shows that trained network gives right perception result toward each images with low error rate. This study is on the meaning of artificial intelligence in design process rather than on the design automation strategy through artificial intelligence.

• The Korean Journal of Ecology
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• 제10권2호
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• pp.53-62
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• 1987

Floristic composition and vertical distribution of Mt. Daedun (western slope) were investigated from 1985 to 1986. The results are as follows; 108 families, 346 genera, 511 species, 2 subspecies, 75 varieties, 5 forma or 593 taxa including 77 cultivars. The floral data showed the ecological characteristics such as the value 346 in Fisher's Index, H-D1-H5 in biological type, 10.9% in urban index of naturalized plants and 60.5% in erect form growth form. Based on the physiognomy and population density of dominant tree species the forest vegetation of Mt. Daedun (western slope) was classified into 5 types; Quercus mongolica forest and Q. variabilis forest at 800m above, Carpinys laxiflora forest and Acer mono forest at 700m to 800m and Sapium japonicum forest at 500m to 800m in altitude. And Lindera erythrocarpa forest and zelkova serrata forest are widely distributed at 400m to 800m in altityde along valley and at mountain foot area.

• 한국가구학회지
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• 제15권1호
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• pp.53-61
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• 2004

German Baroque and Rococo styles in furniture design show three types because of political and geographical conditions - Northern style from Holland and England, Middle one from France, Southern one from Italy, The German's Baroque style, however, emphasized in practicality and metamorphosed form and material using the motive of plant trunk, flame pattern, and Akanthus leaf. Furniture of German Rococo surrounding space, and chairs two-dimensional curved lines than flower, ribbon, and lattice. style was designed form and color becomingly with were displayed decorations of more pictorial and structural forms, using the pattern of palm tree leaf, clam, flower, ribbon, and lattice.