• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2003년도 추계국제학술대회
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• pp.152-152
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• 2003

The majority of the SKYBIO will be used in the treatment of water in food processing plants, swimming pools and cooling towers, in the manufacture fabric softeners in Australia. Most will eventually be released into domestic sewage system as a consequence of product use. The SKYBIO is not readily biodegradable (0% over 28 days), and is expected to have a low partition coefficient and high water solubility (285 g/L), all indicating that the material would be mobile in both aquatic and terrestrial compartment. The PEC/PNEC ratio for the aquatic environment is 56. This value is significantly greater than 1, indicating an immediate concern to the aquatic compartment. However as a consequence of it's cationic character, the SKYBIO will be expected to associate to negatively charged organic matter in soil and sediment.

• 한국지구과학회지
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• 제42권4호
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• pp.412-424
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• 2021

Understanding the distribution of heavy metals in sediment is necessary because labile heavy metals can partition into the water column and bioaccumulate in aquatic organisms. Here we investigated six heavy metals (Co, Cu, Mn, Ni, Pb, and Zn) in sediment cores using a five-step sequential leaching method to examine the occurrence of heavy metals in the sediment. The results showed that all elements, except Mn, are depleted in the exchangeable and carbonate fractions. However, heavy metal concentrations are much higher in the Fe-Mn oxide and organic matter fractions, especially for Cu, indicating enrichment in the organic matter fraction. Furthermore, contamination parameters (contamination factor and geoaccumulation index) indicate that Mn contamination is high, primarily derived from anthropogenic sources, presenting a potential risk to ecosystems in the Nakdong River.

• International Journal of Contents
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• 제1권1호
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• pp.40-44
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• 2005

This paper introduces region partitioning method of non-perfect nested loops with non-uniform dependences. This kind of loop normally can't be parallelized by existing parallelizing compilers and transformations. Even when parallelized in rare instances, the performance is very poor. Based on the Convex Hull theory which has adequate information to handle non-uniform dependences, this paper proposes an enhanced region partitioning method which divides the iteration space into minimum parallel regions where all the iterations inside each parallel region can be executed in parallel by using variable renaming after copying.

• 대한수학회지
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• 제45권5호
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• pp.1243-1253
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• 2008

In this paper, we construct one-factorizations of given complete graphs of even order. These constructions partition the edges of the complete graph into one-factors and triples. Our new constructions of one-factors and triples can be applied to a recursive construction of Steiner triple systems for all possible orders ${\geq}$15.

• 호남수학학술지
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• 제28권3호
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• pp.291-315
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• 2006

By using the new concepts of fuzzy equivalence relations and fuzzy partitions which Dib and Youssef introduced, we obtains fuzzy analogues of many results concerning ordinary equivalence relations and partitions. Also, we give some examples.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2002년도 추계학술발표논문집 (상)
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• pp.11-14
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• 2002

게임에서 충돌탐지는 게임의 성능향상을 위해 중요하다. 본 논문에서는 효율적인 충돌탐지를 위해 BSP 트리를 사용한다. 공격에 사용되는 스프라이트와 공격의 대상이 되는 스프라이트를 트리로 구성하여 빠른 시간내에 충돌탐지를 행한다. 또한 스프라이트의 모양에 따라 경계 볼륨(bounding volume)을 구와 박스(box)를 선택적으로 사용하여 충돌탐지에서 발생하는 문제점을 해결한다.

• Communications for Statistical Applications and Methods
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• 제12권2호
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• pp.539-544
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• 2005

In this paper, we propose the one-step least squares method based on the squared differences to estimate the parameters of the variogram used for spatial data modelling, and discuss its asymptotic efficiency. The proposed method does not require to specify lags of interest and partition lags, so that we can delete the subjectiveness and ambiguity originated from the lag selection in estimating spatial dependence.

• 한국실내디자인학회논문집
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• 제17권5호
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• pp.133-140
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• 2008

This study is purposed to understand the usage of the color and the material pattern in detail and to apply for interior architecture. Many documents have prescribed the color and the pattern at random. While the usage of the color and the materials was ignored rather than architectural form, the importance of the color and the materials stands out in modern interior space. The villa, the weekend home of the Savoye family, was built between 1928 and 1931. Particularly, the villa Savoye was focused for this study. Le Corbusier viewed case pieces for storage and wall partition for division as architecture, and he units furniture and architecture by developing partition that could be painted either the wall color to become part of the wall or in contrasting colors to stand out as wall partition. He loved white and lie believed in using it for interiors, but noted that it should also be balanced with a wall related polychromy. Color became an integral part of white structure of the villa savoye that was raised on stilt with an exterior wall at the base painted green as a visual connection with the lawn. Color was used architecturally in the interior as well, with white walls interrupted by planes of pink, blue and red ocher and it gives the space an unexpected playfulness with tile color of the finishing materials. the various usage of the color and material patterns constitute an element of great architectural richness. They have a unique principle based on emotional order and make the man move to another space and experience the spacial connection.

• 한국콘텐츠학회논문지
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• 제11권3호
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• pp.48-55
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• 2011

본 논문은 비선형 공정의 퍼지 모델을 동정하기 위해 전체 입력의 공간 분할 및 퍼지 추론 방법에 따른 퍼지 추론 시스템의 입출력 특성을 분석하며, 퍼지 모델의 입력 변수와 퍼지 입력 공간 분할 및 후반부 다항식 함수에 의한 구조 동정과 파라미터 동정을 통해 비선형 공정을 표현한다. 퍼지 규칙에서 전반부 파라미터의 동정에는 입출력 데이터의 최소 값과 최대 값을 이용하는 최소-최대 방법 및 입출력 데이터를 군집으로 형성하는 C-Means 클러스터링 알고리즘을 사용하여 입력 공간을 분할한다. 또한 전반부 멤버쉽 함수는 삼각형 멤버쉽 함수를 사용하여 입력 공간을 형성한다. 후반부 동정에서 퍼지 추론 방법은 간략 추론 및 선형 추론에 의해 시스템을 표현한다. 또한, 각 규칙의 후반부 파라미터들, 즉 후반부 다항식의 계수를 동정하기 위해 표준 최소자승법을 사용한다. 마지막으로, 비선형 공정으로는 널리 이용되는 가스로 데이터를 사용하며 이 공정에 대해 성능을 평가한다.

• 농업과학연구
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• 제47권4호
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• pp.867-884
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• 2020

Trypoxylus dichotomus is highly utilized in the domestic insect industry and bred at many farms nationwide. Recently, the number of farmers has been increasing due to the expansion of its use in food and medicine. However, the traditional breeding methods have high economic costs, which include relatively large breeding boxes, large amounts of sawdust and a 2 to 1 ratio (or higher) of female to male. Thus, it is essential to develop a cost-effective breeding method. In this study, a breeding cage with a partition was designed and used to investigate the reproduction rate of T. dichotomus with only a single pair of male and female insect. According to the investigation, the average number of eggs laid in the un-partitioned breeding cage was 93.6, and 121.3 eggs were laid in the partitioned breeding cage. This result shows that T. dichotomus lays more eggs in the partitioned breeding cage rather than in the un-partitioned breeding cage. In addition, it was found that T. dichotomus tends to lay more eggs in compressed sawdust, which was harder than the common fermented sawdust. Through a wind-tunnel assay, it was shown that the ovipositing female recognizes the eggs and avoids them to disperse their eggs elsewhere. These results indicate that the partitioned breeding cage may increase the hardness of the sawdust, restrict the adult's movement and provide a new place for oviposition for the female, and therefore results in an increased reproduction rate with less cost.