• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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• 2002.11a
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• pp.30-32
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• 2002

• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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• 2002.11a
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• pp.26-29
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• 2002

• Electronics and Telecommunications Trends
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• v.4 no.1
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• pp.3-15
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• 1989

컴퓨터에 의한 처리 결과를 음성으로 회답해주는 각종 음성응답 기술의 현황과 응용 및 발전 방향을 정리하였고 이방면 신기술인 텍스트에 의한 음성합성에 관하여도 기술하였다.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2009.06a
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• pp.89-90
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• 2009

• Proceedings of the Korean Fiber Society Conference
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• 2001.04a
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• pp.309-312
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• 2001

• Magazine of RCR
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• v.4 no.1
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• pp.34-42
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• 2009

• Journal of Periodontal and Implant Science
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• v.25 no.3
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• pp.587-602
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• 1995

The purpose of this study was to compare the effects of citric acid and tetracycline HCI application to the root surfaces of periodontally diseased teeth on the proliferation and spreading of human periodontal ligament cells. The roots were prepared so that the comparison could be made among root planed, citric acid treated and tetracycline HCI treated surfaces. In the cell proliferation experiment, human periodontal ligament cells at a concentration of $1{\times}10^5$ cells/ml were seeded in each culture well with specimens and incubated for 6 hours. Then, the specimens were transferred to a fresh culture well and incubated for 24, 48, 72 hours respectively. The cell counting was done after trypsinization. In the cell spreading experiment, $1{\times}10^4$ cells/ml were seeded in each culture well and incubated for 30min, 6 hours and 24 hours at 37.5$^{\circ}C$ in a $CO_2$ incubator. Then, all specimens were fixed with phosphate buffered glutaraldehydes, postfixed with phosphate buffered osmium tetraoxide, stained with phosphate buffered tannic acid, dehydrated in ethanol, dried at a critical point, coated with gold and examined under a scanning electron microscope. The results were as follows:In the cell proliferation experiments, the number of attached cells increased more in the tetracycline treated group than in the other groups. In the initial attachment, the appearance of the tetracycline treated the groups was slightly more spread out than in the other groups. After 6 hours of incubation, it was observed in most of the cells that cell morphologic alteration went from ovoid shapes sto spindle shapes. After 24 hours of incubation, the cells of all groups had a fusiform appearance and were connected to each other by numerous cytoplasmic processes. The tetracycline and citric acid treated groups had a similar spreading appearance of periodontal ligament cells, but the tetracycline treated group was more effective in the cell proliferation than the citric acid group.

• KLA journal
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• v.21 no.4
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• pp.19-28
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• 1980

과학문명이 고도로 발달함에 따라 모든 문제의 해결에 있어서 신속하고 정확하게 처리할 수 있는 기법의 개발이 고조되어 왔다. 이러한 시대적 요구에 부응하기 위해서 인간은 Computer를 만들었고, 이를 실제로 여러 분야에 활용함으로써 괄목할만한 성과를 이룩해 왔다. 그리고 앞으로는 더욱 더 인간 생활의 여러 분야에 깊이 응용될 전망이고 보면, 정보처리조직 분야는 결코 소수의 특수 분야에 특정인들의 생활 도구로 활용되는 것이 아니라 모든 사람의 필수적인 생활 도구화하는 추세이다. 특히 우리나라에서 Computer가 활용되기 시작한 역사는 일천하지만 활용분야나 그 질적인 면에서 대단한 성장을 계속하고 있는 실정이다. 따라서 오늘의 시점에서는 정보처리조직에 대한 기본적인 지식과 활용 기법은 누구나 이해할 필요성이 제고되고 있는 것이다. 이와 같은 추세에 따라 관심을 가지고 정보처리조직에 대한 교육을 실시하고 있다. 따라서 도서관자동화논의가 한창 진행되고 있음에 보조를 맞추는 뜻에서 본 전자정보처리조식개론을 게재하는 바입니다. 그래서 본서는 위에 지적한 사항을 유념하여 전체구성을 10개 Chapter로 엮었다.Chapter 1과 Chapter2는 컴퓨터의 개요와 Computer에서의 자료의 표현방법을, Chapter3 부터 Chapter5까지는 기억장치와 중앙처리장치를 비롯하여 입출력장치를 ,Chapter6부터는 각 프로그래밍 언어의 특성과 오퍼레이팅 시스템 및 기타 사항 등으로 되어있다.

• Korean Journal of Environmental Biology
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• v.18 no.3
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• pp.315-322
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• 2000

Effects of the simulated acid rain on the growth response and the structural features were studied with the 3 month old seedlings of G. biloba and P. thunbergii treated with acid rain of pH 5.6, 4.0, 3.2, and 2.4. The diameter and area of tracheid cells in the transectioned stem of G. biloba decreased with acidity of simulated acid rain. The wall thickness of tracheid cells was the thinest at pH 2.4, but there was no different at other levels of pH. Increasing of the acidity, the height of tracheid cells were reduced steadily. The diameter and area of tracheid cells of the transectioned root reduced with decreasing pH of acid rain, but those at pH 3.2 were larger than those at control. The wall thickness and height of tracheid cells of root were gradually decreased with acidity of acid rain. The size variation of the fusiform cambial initials in the stem of G. biloba sections tangentially showed a shortening tendency with treatment of acid rain. The length of ray initials was the shortest at pH 2.4 and reduced with decreasing pH of acid rain. The diameter, area, wall thickness, and height of the tracheid cells in P. thunbergii stem and root decreased with decreasing pH of acid rain. The areas of the pith, cortex, and xylem in P. thunbergii treated with acid rain decreased, but the cortex and pith areas increased significantly after exposure to acid rain of pH 3.2 compared with control.

• Journal of the Korea Society of Computer and Information
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• v.15 no.2
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• pp.1-8
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• 2010

In this paper, we propose a scheduling strategy for grid environment that reduces resource cost. This strategy considers resource cost and job failure rate to efficiently allocate local computing resources. The key idea of our strategy is that we use two-level scheduling using remote and local scheduler. The remote scheduler determines the expected total execution times of jobs using the current network and local system status maintained in its resource database and allocates jobs with minimum total execution time to local systems. The local scheduler recalculates the waiting time and execution time of allocated job and uses it to determine whether the job can be processed within the specified deadline. If it cannot finish in time, the job is migrated other local systems, through simulation, we show that it is more effective to reduce the resource cost than the previous Greedy strategy. We also show that the proposed strategy improves the performance compared to previous Greedy strategy.