• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.568-571
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• 2012

정보화 사회의 정보 기반 구조로서, 고속 정보망의 구축, 개인용 컴퓨터의 급속한 보급, 멀티미디어 기술의 발전 등으로 인하여 정보 서비스의 새로운 장이 열리고 있다. 동영상 데이터는 텍스트만이 아니라 영상정보, 음성정보등 각종 의미있는 다양한 멀티미디어 정보를 포함하고 있다. 본 논문에서는 동영상에서 음성과 영상을 분리하여 음성을 이용하여 음성열을 분할 및 복원하여 음성을 텍스트로 변환하여 텍스트색인파일을 만들고 영상은 이미지를 분할 및 히스토그램을 사용하여 이미지 샷을 검출하여 두 색인파일을 이용하여 인덱싱을 하여 동영상 검색에 활용한다.

• ETRI Journal
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• v.10 no.4
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• pp.140-145
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• 1988

엘립소메츠리를 이용하여 $B^+$ 및 $As^+$ 이온이 주입된 실리콘층의 굴절률과 소멸계수를 도우즈 및 열처리 조건의 함수로 조사하였다. $B^+$ 이온주입된 실리콘의 경우 n은 $10^13$ 도우즈 이상에서 증가하고, k는 도우즈 증가에 따라 단조 증가를 나타내었다. RTA 열처리가 furnace 열처리 보다 결정성 회복이 우수하였으며, 등온 열처리 시 약 30분이상에서 거의 완전하게 재결정됨을 볼 수 있었다. $As^+$ 이온주입의 경우 $10^15$이상에서 복소굴절률의 변화를 나타내었으며, 열처리에 대해 k가 n보다 민감하였다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.19 no.11
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• pp.2133-2146
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• 1994

In this paper, we present a method for dynamic Jaso segmentation and Hangeul recognition using neural network. It uses the feature vector which is extracted from the mesh depending on the segmentation result. At first, each character is converted to 256 dimension feature vector by four direction contributivity and $8\times8$ mesh. And then, the character is classified into 6 class by neural network and is segmented into Jaso using the classification result the statistic vowel location information and the structural information. After Jaso segmentation, Hanguel recognition using neural network is performed. We experiment on four font of which three fonts are used for training the neural net and the rest is used of testing. Each font has the 2350 characters which are comprised in KS C 5601. The overall recognition rates for the training data and the testing data are 97,4% and 94&% respectively. This result shows the effectivness of proposed method.

• Journal of KIISE:Computer Systems and Theory
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• v.27 no.2
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• pp.123-134
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• 2000

This paper addresses a new triangulation method for constructing surface model from a set of wire-frame contours. The most important problem of contour triangulation is the branching problem, and we provide a new solution for the double branching problem, which occurs frequently in real data. The multiple branching problem is treated as a set of double branchings and an algorithm based on contour merging is developed. Our double branching algorithm is based on partitioning of root contour by Toussiant's polygon triangulation algorithml[14]. Our double branching algorithm produces quite natural surface model even if the branch contours are very complicate in shape. We treat the multiple branching problem as a problem of coarse section sampling in z-direction, and provide a new multiple branching algorithm which iteratively merge a pair of branch contours using imaginary interpolating contours. Our method is a natural and systematic solution for the general branching problem of contour triangulation. The result shows that our method works well even though there are many complicated branches in the object.

• KSBB Journal
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• v.14 no.6
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• pp.655-660
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• 1999

Supercritical fractional extraction of DHA and EPA from the mixture of fatty acids composing the fish oil was performed. The compositions, extracted quantities, and cumulative extracted quantities of fatty acids in the extract and the raffinate were investigated according to the fractional steps. The temperature and pressure for the miximum concentration of DHA and EPA in the extract or the raffinate were 60$^{\circ}C$ and 101 bar respectively among the extraction conditions considered in this study. In this case, the weight percent of EPA in the extract was 50% and that of DHA in the raffinate was 40%. These values were two times higher than those in fish oil. THe same temperature and pressure were used to extract DHA and EPA from the mixture of fatty acids whose the initial weight percent of DHA was 34%. The weight percent of DHA in the raffinate after the fourth fractionation was 7-%. And the remaining weight of DHA in the raffinate was 80% of DHA initially loaded in the extraction vessel.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.45 no.6
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• pp.68-73
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• 2008

In this paper, we propose watermark algorithm called TDWA(Time-Division Watermarking Algorithm) and we applied the proposed algorithm to H.264 video coding standard. We establish that a proposed algorithm is applied to H.264 baseline profile CODEC. The proposed algorithm inserts a watermark into the spatial domain of several frames. We can easily insert strong and invisible watermarks into original pictures using this method. For verification of the proposed algorithm we design hardware core using Verilog-HDL and Excalibur for JM 8.7 code with hardware & software co-simulation. As a result of verification, the PSNR between watermarked pictures and original pictures are more than 60dB and we found the watermark is kept more than 80% after encoding of H.264/AVC with quantization parameter of 28 in baseline profile.

• Journal of Animal Environmental Science
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• v.12 no.2
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• pp.75-84
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• 2006

The effects of the mixture ratios of swine manure and food wastes when vermicomposed on earthworm(Eisenia foefida) growth, the production amounts and the chemical properties of casts for plant growth media were evaluated to optimal mixture ratio. Earthworms were grown in swine manure, substituted with 0%, 20%, 40%, 60%, 50% and 100% food wastes. All of earthworm grown in swine manure substituted with 60%, 80%, and 100% food wastes died, therefore the process of swine manure substituted with 60%, 80%, and 100% food wastes by vermicomposting were impossible in this experiment. Worm cast produced from swine manure substituted with 0%, 20% and 40% food wastes after vermicomposting sufficiently contained required quantities of available phosphorus, exchangeable potassium, exchangeable magnesium, and cation exchange capacity. The survival rates of earthworm in swine manure substituted with 0% and 40% food wastes was significantly higher than those in swine manure substituted with 20%, 40% food wastes. Casts weight and proportion of casts weight in 100% swine manure were significantly higher than those in swine manure substituted with 20% food wastes, but was no significant difference between those in swine manure substituted with 40% food wastes. Therefore 100% swine manure was estimated to be superior than the others treatments. However an adequate mixture ratio of food wastes for processing mixture of swine manure by vermicomposting was estimated to be 40%. Because there was no significant difference in mean flesh weight, increasing rate, casts weight, proportion of casts weight, and reduction rate of volatile solids among 3 treatments and survival rate and conversion efficiency(CE) in swine manure with substituted 40% food wastes were significantly higher than the other treatments.

• Journal of the Korean Wood Science and Technology
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• v.37 no.1
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• pp.56-64
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• 2009

The purpose of this study was to investigate and develop an eco-friendly wood adhesive based on vegetable oil (especially soybean oil), the renewable and sustainable natural resources, using ozonification technology for the chemical structure modification. The soybean oil (SBO) was reacted with $O_3$ at the rate of 7.13 g/h for different times, 15 minutes, 30 minutes, 60 minutes, and 120 minutes. The investigation of the modified chemical structure of the ozonized SBOs were conducted using FT-IR, $^1H$-NMR, MALDI-TOF MS, and GC/MS. As ozonification time increased, the peak of the unsaturated double bonds was disappeared and aldehyde or carboxyl peak appeared because ozonification broke the oil into small molecules. The plywoods were made at $110^{\circ}C$ with 30 seconds/mm hot-press time using the different ozonized SBO/pMDI adhesives and were tested for the dry, wet, cyclic boil test according to the Korea Industrial Standard F3101 Ordinary plywood. The bond strengths gradually increased with increasing ozonification time. The weight ratio 1:1 (ozonized SBO/pMDI), all strengths in 15, 30 and 60 minuets, exceeded constantly the dry, wet, cyclic boiling standard requirement. The range of ozonification time and weight ratio can fulfil1 the requirment of the wet test standard were 30~60 minutes and more than 0.5 pMDI. From the comprehensive view on the results of above experiments, it could be confirmed through experiments that ozonized SBO/pMDI has characteristics of effective reactivity and wet stability showed as an excellent candidate of wood adhesive applications.

• Journal of the korean academy of Pediatric Dentistry
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• v.32 no.3
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• pp.454-460
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• 2005

The purpose of study was to observe the effect of calcium and citric acid on the dental erosion of human premolar enamel. Enamel specimens were demineralized in 0.1%, 0.3%, 0.5%, or 1.0% citric acid solutions with 0.05%, 0.1%, or 0.2% calcium for 5, 15, 30, and 60 minutes, and then the surface microhardness of the enamel was measured. The hardness decreased as the concentration of citric acid and the demineralization time increased. Hardness after 5 minutes was 76~90% in case of no calcium and the inhibition of dental erosion by calcium addition was 2??15%. Hardness after 15 minutes was 65~84% in case of no calcium and the inhibition of dental erosion by calcium addition was 3~17%. Hardness after 30 minutes was 53~72% in case of no calcium and the inhibition of dental erosion by calcium addition was 6~22%. Hardness after 60 minutes was 43~66% in case of no calcium and the inhibition of dental erosion by calcium addition was 7~19%. The inhibition was the highest in 1.0% citric acid and 0.2% calcium. In 0.1% citric acid the inhibition increased as the demineralization time increased, but in 0.3% to 1.0% citric acid the inhibition was most high at 30 minutes and decreased a little at 60 minutes. These results suggest that calcium has a inhibitory effect on the citric acid induced dental erosion.

• The Korean Journal of Pesticide Science
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• v.9 no.4
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• pp.338-346
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• 2005

Serum alanine aminotransferase(ALT), aspartate aminotransferase (AST), hepatic glutathione, glutathione S-transferase(GST), cytochrome P450 and cytochrome P450 reductase activity were measured to investigate the effects of hepatic detoxication system and metabolic activities of carbendazim in Sprague Dawley(S.D.) male rat at dose levels of 375, 750 or 1,500 mg/kg body weight. Serum alanine aminotransferase(ALT) and aspartate aminotransferase(AST) activities were slightly increased in all test groups after 120 minutes of administration. Glutathione was increased about 20% at high and medium dose level within 120 minutes after administration, while activity of glutathione S-transferase was decreased $36{\sim}50%$. However, the enzyme activity was recovered from all test groups after 240 minutes of administration. Cytochrome P450 and activity of cytochrome P450 reductase were decreased $25{\sim}50%$ until 120 minutes after administration, but recovered after 240 minutes.