• Proceedings of the Korea Air Pollution Research Association Conference
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• 2008.10a
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• pp.100-101
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• 2008

• Annual Conference on Human and Language Technology
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• 2011.10a
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• pp.140-142
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• 2011

최근 사용자들 간의 온라인 커뮤니케이션을 통한 정보의 확산이 가속화됨에 따라서 해당 정보의 활용도가 점차 증가되고 있다. 본 논문에서는 온라인상에서 활용되고 있는 신조어를 비교분석하고 태그들의 성격에 따른 확산 패턴을 발견하고 확산 현상을 이해할 수 있도록 확산 현상을 시각화시켜 보여주었다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.06a
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• pp.624-627
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• 2003

Microcontact printing (uCP) of alkanethiols on gold was the first representative of soft-lithography processes. This is an attempt to enhance the accuracy of classical to a precision comparable with optical lithography, creating a low-cost, large-area, and high-resolution patterning process. Microcontact printing relies on replication of a pattered PDMS stamp from a master to form an elastic stamp that can be inked with a SAM solution(monolayer -forming ink) using either immersion inking or contact inking. The inked PDMS stamp is then used to print a pattern that selectively protects the gold substrate during the subsequent etch.

• Journal of the Korean Electrochemical Society
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• v.16 no.4
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• pp.217-224
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• 2013

In this paper, we have investigated the characteristics of cyclic voltammetry of a self-assembled mono-layer(SAM) electrode which was modified by 3-Mercaptopropionic acid (3-MPA) on gold nanoparticle(AuNP)-deposited electrode. Also, the transport phenomena of electrons and ions around the electrode have been analyzed. The governing equation and its boundary conditions by adopting the semi-infinite diffusion model were formulated for the mass-transfer dominant system. In order to obtain the numerical solutions of cyclic voltammetry(CV) on SAM electrodes, MATLAB program was implemented by applying the explicit finite difference method. Resulting CV program for the SAM-modified electrode was verified in good agreements with the experimental CV results for the 3-MPA on AuNP electrode.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.13 no.5
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• pp.400-410
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• 1988

In this paper, a fast synchronization system using SAW TDL matched filter and SAW recirculation loop not only for acquisition but also tracking in the direct sequence spread spectrum communication receiver in case of low SNR was designed and its characteristics were investigated. When signal of 16dB SNR was inputed at the receiver, the PN code of the receiver could be synchronized from the extracted signal for synchronization through SAW TDL matched filter and SAM recirculation loop for 30 recirculations. And the average synchronization time of this system was calculated. From the results, we found that this synchronization system could achieve faster synchronization of PN codes in the receiver under the circumstances of low SNR than that of using only matched filter.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.195-196
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• 2010

The objective of this experiments is to investigate chloride diffusivity of high performance concrete based binary cimentitious materials such as ordinary portland cement and ground granulated blast furnace slag. The results from the study will be utilized as the basic data and guideline in making standard mixproportions and the manufacture, construction work and quality control of HPC.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.20 no.4
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• pp.1177-1185
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• 1996

The crack growth under creep condition is one of the major damage mechanisms which determines remaining life of the component operating at high temperatures. In this paper, the creep crack growth by grain boundary cavitation is studied, which is frequently observed failure mechanism for creep brittle materials. As a result of diffusive growth of creep cavities, it is shown that the crack-tip stress field is modified from the original stress distribution by the amount of singularity attenuation parameter which is function of crack growth rate and material properties. Also, the stress relaxation at crack-tip results in the extension of cavitating area by the load dump effect to meet the macroscopic force equilibrium conditdion.

• Journal of Food Hygiene and Safety
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• v.25 no.1
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• pp.10-15
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• 2010

This study was practiced to survey food-borne bacterial aspects of Escherichia coli and Bacilhus cereus etc. from 210 processed seasoned marine products in Garak fishery wholesale market in Seoul, 2009. Distributions of these bacterial isolates were 28 coliforms, 32 Bacillus spp., 71 Staphylococcus spp., 11 Listeria spp, and 10 Enterococcus spp. in 157 dried squids, 23 dried file fishes, and 20 dried pollacks etc. respectively. Results in 16 kinds of antibiotics susceptibility test by disc diffusion method, special multiple drugs resistance patterns were NOR + LVX + CIP + SAM + VA + S + TE + CF, SAM + C + VA, VA + S + TE, and VA + S in 9 E. coli strains, also, AMC + SAM + CF, SAM + CF, and VA + CF in 21 Bacillus cereus strains respectively. On the basis of the results above, many seasoned dried fishes had multiple drugs resistances, conclusively, we suggest limited guideline and special management on use of antibiotics in floating net cages of fishery farms.

• Proceedings of the KIEE Conference
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• 2007.11b
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• pp.325-327
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• 2007

고효율기기의 보급량은 지원금 수준에 크게 영향을 받으므로 각 고효율기기 프로그램에 대한 적정 지원금 수준의 결정은 매우 중요하다. 그러나 에너지 효율 프로그램에 대한 수요관리 목표량은 과거 실적 데이터를 이용한 단순 확산 모형으로 산정되고 있으며, 목표량에 따른 지원금 또한 단순히 추정하여 산정되고 있는 실정이다. 본 논문은 이론적 배경을 바탕으로 고효율기기별 적정 지원금 수준을 산정하고자 목적함수와 제약조건을 설정하여 최적화를 수행하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2017.11a
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• pp.76-78
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• 2017

본 연구는 공공기관 중심으로 2014년부터 시행되고 있는 NCS 채용제도에 대한 추진배경과 개발경위, 확산정도, 선행연구 사례 등을 개괄적으로 살펴본 후에 항만공기업 중심으로 NCS를 경험한 인사담당자와 입사한 직원 대상으로 설문을 실시하여 채용제도의 변화에 따른 적합성과 효율성, 만족도, 이해도 및 수용성 등을 조사하여 NCS 제도의 유용성을 분석하였다.