• Annual Conference on Human and Language Technology
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• 2016.10a
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• pp.285-290
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• 2016

한국어는 형태론적으로 굴절어에 속하는 언어로서, 어휘의 형태가 문장 속에서 문법적인 기능을 하게 되고, 형태론적으로 풍부한 언어라는 특징 때문에 조사나 어미와 같은 기능어들이 다양하게 내용어들과 결합한다. 이와 같은 특징들은 한국어를 대상으로 하는 구 기반 통계적 기계번역 시스템에서 데이터 부족 문제(Data Sparseness problem)를 더욱 크게 부각시킨다. 하지만, 한국어의 몇몇 조사와 어미는 함께 결합되는 내용어에 따라 의미는 같지만 두 가지의 형태를 가지는 이형태로 존재한다. 따라서 본 논문에서 이러한 이형태들을 하나로 표준화하여 데이터부족 문제를 완화하고, 베트남-한국어 통계적 기계 번역에서 성능이 개선됨을 보였다.

• Journal of the KSME
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• v.56 no.12
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• pp.42-45
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• 2016

인간의 오감을 비롯해 생명체의 감각기관은 선택성, 감도, 크기, 수명, 소모전력 등 여러 측면에서 매우 뛰어난 성능과 장점을 가지고 있으며, 기존센서의 개념적 한계를 극복할 수 있어서 이 분야의 파괴적 혁신을 기대할 수 있다. 감각기관의 구조 및 원리에 대한 심층적인 분석과 공학적인 모사기술이 결합된다면 초감각을 지닌 동물의 감지능력까지도 모사가 가능할 것이다.

• Journal of the KSME
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• v.22 no.5
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• pp.380-388
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• 1982

기관출력과 대기조건 각 변수와의 함수관계에서 이 함수가 서로 독립이고, 기관출력은 이들의 선형결합으로 표시됨을 실험으로 확인하였으며, 대기압력 변화 대신 흡기압력과 배기압력을 각각 변화시켜도 지장이 없음을 알았다. 이상과 같은 것으로부터 실험적 출력수정 방법의 타당성을 확인함과 동시에 통상의 대기상태의 변화에 있어서 수정 정밀도가 극히 높다는 것이 입증 되었 으므로 출력수정에 관한 충분한 자료가 되리라는 것을 믿는 바이다.

• The korean journal of orthodontics
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• v.27 no.2
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• pp.315-326
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• 1997

The purpose of this study was to evaluate the shear bond strength of three kinds of different ceramic brackets with three different bonding adhesives. 5 specimens for each combination were tested for shear bond strength using Instron and for fracture site using SENL And 3 specimens were cross-sectioned for SEM examination of bonding pattern between bracket, resin and enamel surface. The results were as follows 1. The shear bond strength of chemical curing adhesives were higher than that of light curing adhesives. 2. The shear bond strength of Starfire bracket, chemical-bonded type, was lower than that of Transcend bracket, mechanical-bonded type, and Fascination bracket, combined type. 3. Fracture site of each bracket and tooth surface was examined under a light optical stereoscopic microscope, Transcend groups were mainly at the E/R intderface. Fascination groups were mainly at the COMB interface and Starfire groups were mainly at the R/B interface.

• Proceedings of the Membrane Society of Korea Conference
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• 2004.05b
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• pp.160-162
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• 2004

기계적, 열적 강도가 우수한 무기막과 다양한 기능성을 가질 수 있는 유기막의 결합에 관하여 그동안 많은 연구가 진행되어왔다. 무기막은 높은 열적, 기계적 안정성을 가지고 있기 때문에 지지체로써 큰 이점을 가지고 있으며, 고분자를 비롯한 유기막은 그 다양성과 응용성에 있어 장점을 가지고 있다. 이에 본 연구는 지지체로써 물성이 뛰어난 세라믹막의 표면에 다양한 유기 기능기를 가지는 실란화합물을 그래프팅 방법을 통하여 도입하여 유-무기 혼성막을 제조하고 표면 특성의 변화를 살펴보고자 하였다.(중략)

• Composites Research
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• v.17 no.1
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• pp.10-17
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• 2004

In this work, the blend system prepared from epoky(DGEBA)/polymethylmethacrylate(PMMA) was investigated in thermal and mechanical interfacial property measurements. The thermal properties were carried out by DSC, DMA, and TGA measurements. Also, the surface free energy and fracture toughness were determined by contact angle and critical stress intensity factor($K_{IC}$), respectively. And the fracture surface was observed by SEM after $K_{IC}$ tests. As experimental results, the curing temperature and glass transition temperature were slightly increased in addition of PMMA. Surface free energy of the blends showed an improved value at low contents of PMMA which could be attributed to the both increasings of London dispersive and polar components. From measurement of $K_{IC}$ of the blends, the highest value was found at 5 phr. This was due to the increasing of compatibility or physical interaction in macromolecular chains between DGEBA and PMMA of the blends.

• Composites Research
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• v.32 no.6
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• pp.388-394
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• 2019

Inherited the excellent electrical and mechanical properties based on the low dimensional structure of graphene, three-dimensional graphene nanostructures have gathered great attention as electrochemical energy storage electrodes owing to their high porosity and large specific surface area. Also, having the catecholamine structure, dopamine has been regarded as a multifunctional material to possess high affinity to various organic/inorganic materials and to modify a hydrophobic surface to a hydrophilic one. In this work, through coating dopamine on the three-dimensional graphene nanostructure, we tried to increase the specific capacitance by enhancing the wettability with electrolyte and to improve the mechanical compressive property by strengthening the nano-architecture. As a result, the dopamine-coated nanostructure exhibited significant improvement on the specific capacitance (51.5% increase) and compressive stress (59.6% increase).

• Journal of the Korean Vacuum Society
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• v.6 no.2
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• pp.151-158
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• 1997

Nitrogen incorporated diamond-like carbon films were deposited by r.f. glow discharge of mixtures of benzene and ammonia gases. Mechanical properties, composition and atomic bond structure were investigated when the fraction of ammonia increases from 0 to 0.79 and the negative self bias voltage of cathode from 100 to 900 V. Both the residual compressive stress and the hardness decrease from 1.7 to 1.0 GPa and from 2750Kgf/$\textrm{mm}^2$ to 1700Kgf/$\textrm{mm}^2$, respectively. In addition to hydrogen, triply bonded nitrogens also play a role of teminal sites of the three dimensional atomic bond network. By considering the hydrogen concentration and the nitrogen bond characteristics, it can be shown that the mechanical properties of the films are determined by the content of three dimensional inter-links of $sp^2$ clusters. Although the mechanical properties are affected by the nitrogen addition, its depedence on the negative bias voltage is qualitatively identical to that of pure diamond-like carbon films.

• Journal of Internet Computing and Services
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• v.13 no.4
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• pp.45-52
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• 2012

T cells induce immune responses and thereby eliminate infected micro-organisms when peptides from the microbial proteins are bound to HLAs in the host cell surfaces, It is known that the more stable the binding of peptide to HLA is, the stronger the T cell response gets to remove more effectively the source of infection. Accordingly, if peptides (HLA binder) which can be bound stably to a certain HLA are found, those peptieds are utilized to the development of peptide vaccine to prevent infectious diseases or even to cancer. However, HLA is highly polymorphic so that HLA has a large number of alleles with some frequencies even in one population. Therefore, it is very inefficient to find the peptides stably bound to a number of HLAs by testing random possible peptides for all the various alleles frequent in the population. In order to solve this problem, computational methods have recently been developed to predict peptides which are stably bound to a certain HLA. These methods could markedly decrease the number of candidate peptides to be examined by biological experiments. Accordingly, this paper not only introduces a method of machine learning to predict peptides binding to an HLA, but also suggests a new prediction model so called 'knowledge-based genetic algorithm' that has never been tried for HLA binding peptide prediction. Although based on genetic algorithm (GA). it showed more enhanced performance than GA by incorporating expert knowledge in the process of the algorithm. Furthermore, it could extract rules predicting the binding peptide of the HLA alleles common in Koreans.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1213-1215
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• 2008

분산능력은 나노콤포지트의 제반적인 물성에 큰 영향을 준다. 그러나 유기용매를 사용한 분산능력은 전기적 절연특성에 불순물케리어로 작용되는 경우가 있어 오히려 절연성능 즉, 결합이 약하게 작용되는 결과를 가져오게 된다 이런 이유로 물리적인 분산법인 강력초음파법을 이용하여 Epoxy/Organoclay_93A 나노콤포지트를 제조하였다. 최적의 초음파 적용시간을 연구하기위해 강력초음파를 15,30,60,120분 각각에 대해 적용하였다. 적용시간은 기계적,전기적인 물성에 독립적인 특성을 나타내었다. 그러나 전반적인 물성의 비교에서 최적의 초음파 적용시 60분의 경우가 가장 양호한 결과를 얻었다. 기계적, 전기적인 물성에서 1차경화만으로 측정자료로 최적의 2차 경화를 가져가하면 더욱 높은 물성을 가져오게 될 것이다.