• Journal of the Korean Institute of Telematics and Electronics B
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• v.30B no.2
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• pp.19-32
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• 1993

This paper suggests the new high-speed input/output techniques in a shared memory multiprocessor system. The high-speed I/O processor which can connect the different kinds of large sized I/O periperal devices, the communication protocol to the main processing units for I/O operations, and the job scheduling scheme are addressed. This paper also introduces the disk cache technique which supports the slow I/O devices comparing with the main processing units. These techniques were implemented in the TICOM system. The performance evaluation statistics were collected and analyzed for the suggested high-speed I/O processing techniques. These statistics show the superiority of the suggested techniques.

• Korean Journal of Pharmacognosy
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• v.32 no.3 s.126
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• pp.233-237
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• 2001

Korean folk medicine 'Koaeng I Bab' has been used to cure hemorrhoid, boil and dermatopathy and as an antidote. The botanical origin of the crude drug has not been studied pharmacognostically. To clarify the botanical origin of 'Koaeng I Bab', the morphological and anatomical characteristics of the leaves of Oxalis species growing in Korea, i.e. O. acetosella, O. acetosella var. purpurascens, O. corniculata, O. obtriangulata were studied. As the result, the botanical origin of 'Koaeng I Bab' has been proved to be O. corniculata and O. acetosella var. purpurascens.

• Journal of KIISE:Databases
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• v.28 no.4
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• pp.596-605
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• 2001

In this paper we propose a method, called the range-based cube partitioning (RCP)method for reducing I/O cost of cube computation in OLAP The method improves I/O performance of cube partitioning process by overlapping some computation between partitioning stages. For overlapping the computation, the method partitions the cube based on the ranges of attribute values, not the points of attribute value, Through analysis any experiments, we show the performance of the proposed method with comparison of the previous cube partitioning method.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.174-177
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• 2012

최근 다양한 분야에서 널리 사용되고 있는 가상화 기술은 가상머신에 높은 성능의 프로세서 및 메모리 자원을 제공하고 있다. 반면에 가상화 환경에서의 I/O는 여전히 낮은 성능을 보이며 I/O 중점적인 워크로드의 가상화에 걸림돌이 되고 있다. 이러한 성능 저하는 일반적인 장치 접근 과정에 비해 매우 복잡한 과정을 거치는 기존의 가상화 프레임워크에 의해 발생한다. I/O 요청의 각 처리과정에서 발생하는 모드전환을 제거함으로써 가상머신의 I/O 성능을 향상 시킬 수 있다. 본 논문에서는 모드전환을 완전히 제거한 장치가상화 프레임워크를 제안하고 실험을 통해 본 기법의 타당성을 입증한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.199-201
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• 2012

디스크나 이더넷과 같은 I/O 장치로부터 발생하는 I/O 트래픽은, 여러 개의 노드를 가진 NUMA 시스템의 공유 LLC에 캐시 오염을 일으켜 캐시 라인이 재사용되는 것을 방해한다. 이러한 태스크는 캐시를 효율적으로 이용할 수 있는 메모리 집중적인 태스크들과 따로 분리하여 다룰 필요가 있다. 본 논문에서는 이러한 캐시 오염을 발생시키는 태스크들을 해당 태스크의 I/O 트래픽을 이용하여 실시간으로 감시하고 분류하는 기법을 제안한다. 또한 대량의 I/O 트래픽을 일으키는 태스크의 특성을 알아본다. 이를 통해, NUMA 시스템 환경에서 각 노드의 공유 LLC를 보다 효율적으로 사용할 수 있는 운영체제 스케줄링 기법을 연구하기 위한 토대를 마련하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.257-260
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• 2008

SSD는 하드디스크와 다른 구조를 갖고 있으며, 단편화된 잦은 쓰기 연산에 취약하다는 점 등 기존의 환경과는 차이가 있기 때문에 이런 환경에서 발생하는 연산, 특히 I/O 연산에 대한 분석이 필수적이다. 기존의 I/O 연산 측정도구로 사용되던 벤치마크를 이용하여 SSD의 성능을 측정할 경우에는 상위단계에서의 읽기, 쓰기, 성능만 분석되기 어렵기 때문에 하위단계에서 실제로 SSD상의 I/O연산의 수행 성능을 정확히 측정하기 어렵다. SSD는 내부 저장 알고리즘의 효율성에 따라서 성능 차이가 크기 때문에 정확한 성능을 측정할 수 있는 분석 도구가 필요하다. 본 논문에서는 SSD상에서의 I/O연산의 계층적 분석을 위한 모듈을 제안한다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2001.07a
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• pp.45-49
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• 2001

We have investigated physical and electrical properties of the Hf $O_2$/HfS $i_{x}$/ $O_{y}$ thin film for alternative gate dielectrics in the metal-oxide-semiconductor device. The oxidation of Hf deposited directly on the Si substrate results in the H $f_{x}$/ $O_{y}$ interfacial layer and the high-k Hf $O_2$film simultaneously. Interestingly, the post-oxidation N2 annealing of the H102/H1Si70y thin films reduces(increases) the thickness of an amorphous HfS $i_{x}$/ $O_{y}$ layer(Hf $O_2$ layer). This phenomenon causes the increase of the effective dielectric constant, while maintaining the excellent interfacial properties. The hysteresis window in C-V curves and the midgap interface state density( $D_{itm}$) of Hf $O_2$/HfS $i_{x}$/ $O_{y}$ thin films less than 10 mV and ~3$\times$10$^{11}$ c $m^{-2}$ -eV without post-metallization annealing, respectively. The leakage current was also low (1$\times$10-s A/c $m^2$ at $V_{g}$ = +2 V). It is believed that these excellent results were obtained due to existence of the amorphous HfS $i_{x}$/ $O_{y}$ buffer layer. We also investigated the charge trapping characteristics using Fowler-Nordheim electron injection: We found that the degradation of Hf $O_2$/HfS $i_{x}$/ $O_{y}$ gate oxides is more severe when electrons were injected from the gate electrode.e electrode.e.e electrode.e.

• Journal of Environmental Science International
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• v.14 no.4
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• pp.389-395
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• 2005

The changes of O-J-I-P transients were investigated using leaves of four subtropical plant species (Crinum asiaticum var. japonicum, Osmanthus insularis, Chloranthus glaber and Asplenium antiquum) under the natural conditions in winter, in order to select the stress indicators for diagnosing physiological states of plants under low temperature. In the O-J-I-P transients of these species, the fluorescence intensity was found to be higher in O-step and lower in P-step in winter than in summer. Particularly, the fluorescence intensity of the P-step in Crinum asiaticum var. japonicum was lower than those of other three plant species, indicating that Crinum asiaticum var. japonicum is the most sensitive to low temperature. Of the chlorophyll fluorescence parameters derived from O-J-I-P transients of four subtropical plants, Fm, Fv/Fo, ABS/CS, TRo/CS, $\phi_{po}$ and $\phi_{po}/(1-\phi_{po})$ decreased significantly with the increase of Fo, Sm, N, EToICS, ETo/RC and $\psi_o/(1-\psi_o)$ depending on temperature drop in winter. Therefore, these parameters could be used as indicators for estimating low temperature stress and diagnosing physiological states of plants under the natural conditions in winter.

• Herbal Formula Science
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• v.19 no.1
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• pp.35-49
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• 2011

Objectives : This study aims to reveal the characteristics of formulas in "Xi$\v{a}$o' Er Y$\`{a}$o Zh$\`{e}$ng Zh$\'{\i}$ Ju$\'{\e}$. Methods : For that objectives, We analyzes formulas in "Xi$\v{a}$o' Er Y$\`{a}$o Zh$\`{e}$ng Zh$\'{\i}$ Ju$\'{\e}$. In the text, 132 formulas were described. To comprehend the formulas, we classified them as several bases. Results : After those analyses, we bring to a conclusion as follows. 1. 30 formulas are described that treated convulsive diseases (j$\={i}$ngf$\={e}$ng, 惊風). Next, g$\={a}$n(疳), parasite infection, diarrhea/dysentery, dermatosis and etc were in the order. 2. Classified by the formulation, Yu$\'{\a}$nj$\`{i}$(圓劑) was the best(70 kinds of formulas, 53%). S$\v{a}$nj$\`{i}$(散劑) was a form of 41 formulas(31%). T$\={a}$ngj$\`{i}$(湯劑) and g$\={a}$oj$\`{i}$(膏劑) were a form of 5 formulas each. 10 formulas were assumed the form of w$\`{a}$iy$\`{o}$ngj$\`{i}$(外用劑). 3. We researched in-depth analysis of Yu$\'{\a}$nj$\`{i}$. As a results, dosage, additive(輔料) and the time to take of Yu$\'{\a}$nj$\`{i}$ were decomposed. Also, the formulas that treated convulsive diseases were analyzed by the herbs classification. Conclusions : Though the formulas that treated convulsive diseases were hard to application at local clinic, overall nosology of pediatrics was reflected comparatively. "Xi$\v{a}$o' Er Y$\`{a}$o Zh$\`{e}$ng Zh$\'{\i}$ Ju$\'{\e}$ was expected to play a role for reconsideration of formulas' formulation.

• Proceedings of the IEEK Conference
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• 1999.06a
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• pp.773-776
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• 1999

For providing good quality power steadily, it is required that operators manipulate the control system of power plant with the good knowledge of power plant system and the control strategies, and cope with accidents effectively. With those requirements, it is general to train operators in power plant control room using full-scope simulator. A full scope simulator adopts the I&C instruments in the main cotrol room, so has to include I/O interface system to interface the simulation computer with I&C instruments in main control room. In already developed simulators, most of I/O interface systems are closed. vendor-dependent. proprietary systems. so have the many disadvantages in terms of cost and maintenance. In this paper. we suggest the method to configure I/O interface system for Thermal Power Plant Simulator based on standard technology which gives the advantages of ease-of-use. cost effectiveness, and simplicity of maintenanceuse by using off-the-shelf products for system integration.