• Journal of the Korean Chemical Society
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• v.45 no.2
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• pp.143-148
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• 2001

In this study, open tubular capillary columns for ion charomatography were developed to analyze trace amount of ions in samples. When small I,D. capillary column length is 1.0~5.0 m. The capillary columns were made using fused silica capillary(I.D:50㎛) and DMEOHA latex particles. The new conductivity cell and suppressor were also developed and made for capillary column ion chromatography. When several anions(fluoride, nitrite, nitale,chlorate,phosphte, sulfate) were analyzed using these capillary columns. reproducible and good chromatograms were obtained.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2006.04a
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• pp.127-132
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• 2006

Recently, several displacement measuring instruments such a GPS are substantially developed by development of an artificial satellite. Considering this trend, in future displacement measurement will be a very efficiency method, therefore we need to develop structure maintenance & management by using displacement measuring instruments. In this study, I suggest to maintenance & management method about simple beams and cantilever beams which are very important structurein civil engineering by using displacements. I suggest a system which trace behavior of beams by combining some measurement points and a specific displacement function and research that tl1e proper number of measurement and optimum measurement points to efficiently use the system.

• The Bulletin of The Korean Astronomical Society
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• v.35 no.2
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• pp.30.2-30.2
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• 2010

A direct tilted-ring fitting method allows us to investigate kinematic structure of spiral galaxies. By employing the method to high-resolution HI data cubes, we can more easily trace warp characteristics of spiral galaxies than ever. In this contribution, we make use of TiRiFiC to VLA HI data cube of spiral galaxies in Virgo cluster, and present our preliminary yet interesting results. The TiRiFiC (Tilted-Ring-Fitting-Code) is publicly available code that provides 'best-fit' tilted-ring parameters (i.e. position angle and inclination) via chi-square minimization technique. We also discuss possible biases (e.g., resolution dependency) and its effect on our conclusions.

• Korean Deer Journal
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• no.14
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• pp.12-21
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• 1991

Several experiments were carried for the purpose of establishing the basis for the quality evaluation of deer horn. Deer horn originated from China, New Zealand, Soviet and Alaska were used as objectives and some constituents involved in deer horn were as

• Proceedings of the KSPS conference
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• 2006.11a
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• pp.31-36
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• 2006

Research in the Center for Pediatric Auditory and Speech Sciences (CPASS) is attempting to characterize or phenotype children with speech delays based on acoustic-phonetic evidence and relate those phenotypes to chromosome loci believed to be related to language and speech. To achieve this goal we have adopted a highly interdisciplinary approach that merges fields as diverse as automatic speech recognition, human genetics, neuroscience, epidemiology, and speech-language pathology. In this presentation I will trace the background of this project, and the rationale for our approach. Analyses based on a large amount of speech recorded from 18 children with speech delays will be presented to illustrate the approach we will be taking to characterize the acoustic phonetic properties of disordered speech in young children. The ultimate goal of our work is to develop non-invasive and objective measures of speech development that can be used to better identify which children with apparent speech delays are most in need of, or would receive the most benefit from the delivery of therapeutic services.

• Economic and Environmental Geology
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• v.29 no.3
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• pp.247-256
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• 1996

Mineral commodities of metallic ore deposits related to Cretaceous granitoids in the Taebaegsan basin are distinguishable by rock types, diffferenciation index (D.I.) and chemical compositions. Deposits of Fe-Cu are related to granodiorite-quartz monzonite, those of Pb-Zn and W-Mo to granite-granodiorite and granite respectively. The ranges of D.I. of the granitoids are 39~71 for Fe-Cu deposits, 68~81 for Pb-Zn deposits, 78~89 for W-Mo deposits and 91~94 for Mn deposits. Major oxides of $K_2O$, CaO, MgO, FeO and $TiO_2$ and some trace elements and Rb/K, Sr/Ca and Cu/Fe also show distinguishable differences among the Cretaceous granitoids related to various mineral commodities of the ore depsits.

• Computational Structural Engineering
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• v.7 no.2
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• pp.61-67
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• 1994

The objective of this numerical analysis is to trace the hysteretic behavior of steel angles under very-low-cycle loading test, especially the history and cumulative state of local stress-strain at their critical parts. The computer model is based on a three-dimensional, non-linear analysis by using the finite element program, MSC/NASTRAN, which includes the effects of the material and geometric non-linearities. The analysis was performed as two stage procedures, namely Analysis I and II. The overall behavior from this analysis showed good agreement with the experiment.

• The Transactions of the Korea Information Processing Society
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• v.7 no.5S
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• pp.1719-1725
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• 2000

Since the advance of WWW, internet related fields have been growing very rapidly. Especially, the development of electronic commerce ares have changed even or life style. This paper is about the design and implementation of an internet auction system, which is considered as on of the most attractive internet services. An internet auction system has more complex processes compared with other electronic commerce systems. In auction systems, bids and a successful bid are required in trading all goods. In this paper, I designed and implemented all processes of an internet auction system, in which a bid tracing systems is included for the first time. The bid tracing system is implemented using only HTTP in maintain compatibility in WWW environment. I also used th JAVA blocking concept to simulate two-way communication. The proposed system is implemented on Windows NT environment using JAVA, ASP, and the Oracle database.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10a
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• pp.351-355
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• 2006

최근 플래시 메모리는 여러 장점들 때문에 다양한 휴대기기에서 많이 사용되고 있다. 반면 내구성에 약점을 갖고 있는 플래시 메모리의 특성 때문에 최대한 소거 동작을 적게 하여 오랫동안 사용하는 FTL 알고리즘을 개발하는 연구가 필요하다. 이러한 FTL 알고리즘을 실험하고 평가하기 위해서 트레이스 데이터를 연구에 활용하는 일이 많아지면서, 쉽게 트레이스 데이터에 대한 분석도구를 개발하였다. 우리는 트레이스 데이터를 다양한 그래프로 그려주고 통계치를 산출해주는 도구를 개발하였고, 이를 바탕으로 트레이스 분석 작업을 쉽게 할 수 있도록 하였다. 마찬가지로 이러한 도구는 버퍼 교체정책을 실험하고 평가하는 일에도 사용 될수 있다. 그리고 각 그래프를 설명하면서 트레이스에 데이터 대한 설명과 함께 분석을 통하여 버퍼교체 알고리즘 및 FTL 알고리즘에 어떻게 활용 할 수 있는지 설명하였다.

• Bulletin of the Korean Chemical Society
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• v.20 no.9
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• pp.1040-1044
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• 1999

A micro porous PTFE membrane desolvator (MMD) was built and evaluated for the on-line removal of organic solvents to facilitate the determination of trace metal contaminants in the solvents by ICP-AES. Three organic solvents, isopropyl alcohol (IPA), methanol, and dimethy sulfoxide (DMSO) were studied. The MMD reduced organic solvent concentration in the sample aerosol stream by 82% to 89%, as indicated by monitoring C(I) emission. Net signal intensity of Fe, Al, and Cu was increasing with higher organic solvent concentration, with the rate of increase being solvent dependent. The signal intensities for Mg and Pb followed the trend with the C(I) signal. Changing the sweep gas flow rate affected the optimum signal intensity. Wine samples were analyzed by the method of standard addition. The concentrations of B, Al, and Mg were determined with a relative precision of less than 2.3%.