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강찬현(Chan-Hyun Kang),황정래(Jung-Rae Hwang),이기준(Ki-Joune Li) 한국정보과학회 데이터베이스 소사이어티 2006 데이타베이스 연구 Vol.22 No.3
스포츠는 다양한 형태의 이동 객체가 존재 한다. 이러한 이동 객체의 특성과 이동 궤적을 분석한 결과는 스포츠 분야에 유용한 정보로 사용될 수 있다. 축구에서 존재하는 이동 객체는 선수와 공이다. 이 이동 객체들은 서로 상호적인 반응하면서 이동 궤적을 생성한다. 이렇게 생성된 이동 궤적은 이동 객체간의 연간 관계가 표현 되어 있다. 그래서 각 이동 객체의 특성을 이용하여 이동 궤적 간의 연관 관계를 분석 한다면 선수들이 전술적인 움직임을 분석 할 수 있다. 이 논문에서는 선수와 공의 이동 궤적 간의 연관 관계를 분석하여 선수들의 능력을 수치적인 값으로 나타낼 수 있는 방법을 제시한다. In order to make good strategies, soccer coaches analyze the archives of matches, which can be effectively considered as a set of trajectories. We can extract several types of useful information by analyzing the trajectories of moving objects, which consist of 22 players and a ball. Since each moving object interacts with others and produces a trajectory, its trajectory has a certain number of relationships with others, which are a basic type of information to make soccer strategies. In this paper, we propose a model to quantitatively express the performance of soccer players. This model is based on the relationships between trajectories of 22 players and a ball and allows evaluate the performance of several players in quantitative way.
폴리히드록시아미드 공중합체의 열 고리화 거동에 대한 연구
강찬솔,민재호,남민우,서무송,지민호,백두현,Kang, Chan Sol,Min, Jae Ho,Nam, Min Woo,Seo, Moo Song,Jee, Min Ho,Baik, Doo Hyun 한국섬유공학회 2016 한국섬유공학회지 Vol.53 No.5
A series of polyhydroxyamide copolymers (Co-PHAs) containing 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (BAHHFP) and/or bis(3-amino-4-hydroxyphenyl) sulfone (BAHS) were synthesized via a low-temperature solution polymerization method. The synthesized Co-PHAs were characterized by Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). All the Co-PHAs were found to be soluble in organic solvents with or without LiCl. The chemical structures of the Co-PHAs were identified using FT-IR spectroscopic analysis. The DSC and TGA results showed that the inclusion of BAHHFP and/or BAHS in the Co-PHAs reduced the thermal cyclization temperatures as compared to DHB, which is due to the difference in the rotational energy of the diamine monomers.
폴리히드록시아미드 섬유의 제조와 열처리에 따른 구조-물성 상관관계(I) -다양한 고화조건에 따른 고화거동-
강찬솔,지민호,백두현,Kang, Chan Sol,Jee, Min Ho,Baik, Doo Hyun 한국섬유공학회 2013 한국섬유공학회지 Vol.50 No.4
Polyhydroxyamide (PHA) was synthesized using low temperature solution polymerization of 3,3'-dihydroxybenzidine (DHB) and isophthaloyl chloride (IPC) in N,N-dimethylacetamide (DMAc). In order to study wet-spinning of PHA fibers, the diffusion property of DMAc in various coagulants and the effect of coagulation bath temperature were evaluated. The initial diffusion rate of DMAc, and the SEM images and mechanical properties of PHA fibers, demonstrated that the coagulation in ethanol at $20^{\circ}C$ was the most optimal among all the conditions examined. The tensile strength and initial modulus of PHA fibers increased, while its breaking strain decreased with increasing spin draw ratio (SDR). The wide-angle X-ray diffraction (WAXD) experiment revealed that the crystallinity of PHA fibers increased with increasing SDR. The process-structure-property relationship among PHA fibers under various coagulation conditions was also investigated.
MWNT와 Graphite 전도성 나노입자를 함유한 폴리우레탄 하이브리드 나노복합체의 기계적 물성 및 전기적 특성 평가
강찬솔,지민호,백두현,Kang, Chan Sol,Jee, Min Ho,Baik, Doo Hyun 한국섬유공학회 2012 한국섬유공학회지 Vol.49 No.3
The synergistic effects of multi-walled carbon nanotubes (MWNT) and graphite on the structural features and mechanical and electrical properties of polyurethane (PU) nanocomposites were investigated as functions of filler content. SEM images of the PU/hybrid nanocomposite exhibit that the MWNTs and graphite are dispersed well in the PU matrix and form an interconnected network structure. Accordingly, the tensile strength and strain-at-break of the PU/hybrid nanocomposites were much higher than those of the PU/MWNT and PU/graphite nanocomposites at the same filler content. In addition, it is found that the PU/hybrid nanocomposite containing 1.25 wt% MWNTs and 1.25 wt% graphite shows the electrical conductivity of $1.2{\times}10^{-4}S/cm$, which is higher by three orders than that of PU/graphite nanocomposite containing 20.0 wt% graphite. The highly improved mechanical and electrical properties of the PU/hybrid nanocomposite are thought to be due to the interconnected network structure of MWNTs and graphite in the PU matrix.
강찬현(Chan-Hyun Kang),황정래(Jung-Rae Hwang),이기준(Ki-Joune Li) 한국정보과학회 데이터베이스 소사이어티 2006 데이타베이스 연구 Vol.22 No.2
스포츠는 다양한 형태의 이동 객체가 존재 한다. 이러한 이동 객체의 특성과 이동 궤적을 분석한 결과는 스포츠 분야에 유용한 정보로 사용될 수 있다. 축구에서 존재하는 이동 객체는 선수와 공이다. 이 이동 객체들은 서로 상호적인 반응하면서 이동 궤적을 생성한다. 이렇게 생성된 이동 궤적은 이동 객체간의 연간 관계가 표현 되어 있다. 그래서 각 이동 객체의 특성을 이용하여 이동 궤적 간의 연관 관계를 분석 한다면 선수들이 전술적인 움직임을 분석 할 수 있다. 이 논문에서는 선수와 공의 이동 궤적 간의 연관 관계를 분석하여 선수들의 능력을 수치적인 값으로 나타낼 수 있는 방법을 제시한다. In order to make good strategies, soccer coaches analyze the archives of matches, which can be effectively considered as a set of trajectories. We can extract several types of useful information by analyzing the trajectories of moving objects, which consist of 22 players and a ball. Since each moving object interacts with others and produces a trajectory, its trajectory has a certain number of relationships with others, which are a basic type of information to make soccer strategies. In this paper, we propose a model to quantitatively express the performance of soccer players. This model is based on the relationships between trajectories of 22 players and a ball and allows evaluate the performance of several players in quantitative way.
플루오르기가 도입된 폴리히드록시아미드의 합성과 고리화 반응
박채원,강찬솔,백민정,백두현,Park, Chae Won,Kang, Chan Sol,Paik, Min Jung,Baik, Doo Hyun 한국섬유공학회 2014 한국섬유공학회지 Vol.51 No.5
We have synthesized four kinds of polyhydroxyamides (PHAs) via low-temperature solution polymerization of 2,2-bis(3-amino-4-hydoxyphenyl)hexafluoropropane or 3,3'-dihydroxybenzidine with isophthaloyl chloride or terephthaloyl chloride in N,N-dimethylacetamide and 1-methyl-2-pyrrolidone, respectively. The chemical structures of the synthesized PHAs and the polybenzoxazoles(PBOs) obtained by heat-treatment of the PHAs were identified using FT-IR spectroscopic analysis. We studied the thermal cyclization behavior of the PHAs and related this behavior to their chemical structures. DSC and TGA results showed that both the thermal cyclization temperatures and the thermal stabilities were decreased by introduction of fluorine into the main chain of the PHAs.
지민호,강찬솔,여문진,백두현,Jee, Min Ho,Kang, Chan Sol,Yeo, Moon Jin,Baik, Doo Hyun 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.6
Polyhydroxyamide (PHA) was synthesized by low-temperature solution polymerization of 3,3'-dihydroxybenzidine and terephthaloyl chloride. Then, pure PHA and PHA nanocomposite fibers, including multi-walled carbon nanotube (MWNT), were prepared by a wet-spinning process. The structural characteristics, thermal properties, and mechanical performances, such as tensile strength, initial modulus, and compressive strength, of the PHA fibers were investigated using FT-IR, TGA, and a tensile testing machine. The TGA results show that the PHA fiber has excellent thermal stability at high temperatures and can undergo thermal cyclization to yield PBO fiber. The tensile mechanical properties of PHA nanocomposite fibers were better than those of pure PHA fiber, and they were improved on increasing the MWNT content. The highly improved mechanical properties of the nanocomposite fibers are thought to be related to the strong interfacial interactions between the PHA matrix and MWNT.
방향족 폴리히드록시아미드의 합성과 열적 고리화 거동(II) -플루오르 치환체의 영향-
지민호,백민정,강찬솔,백두현,Jee, Min Ho,Paik, Min Jung,Kang, Chan Sol,Baik, Doo Hyun 한국섬유공학회 2013 한국섬유공학회지 Vol.50 No.5
Polyhydroxyamide (PHA) was synthesized via low-temperature solution polymerization of 3,3'-dihydroxybenzidine with isophthaloyl chloride, and the derivatives of PHA containing fluoro-substituents were investigated for exploring their potential application as new thermally stable polymer material. The structural properties, solubility, and thermal cyclization of the PHA and its derivatives were characterized using FT-IR, DSC, and TGA to derive the relationship between the structure of the PHA derivatives and the thermal properties and cyclization behavior of the polymer. The PHA derivatives containing fluoro-substituents were readily soluble in a variety of solvents without LiCl, whereas the pristine PHA was soluble only in the presence of LiCl. The DSC analyses under isothermal conditions showed that the PHA derivatives exhibited a faster cyclization rate than the pristine PHA at $220^{\circ}C$ and $250^{\circ}C$. In addition, the DSC and TGA results revealed that the PHA derivatives could be cyclized into the corresponding polybenzoxazoles at lower temperatures than the pristine PHA; this could be attributed to the lower thermal activation energy of the derivatives owing to the introduction of the fluoro-substituents.
석은경(Eun-Kyung Seok),강찬현(Chan-Hyun Kang),문정욱(Jung-Wook Moon),이기준(Ki-Joune Li) 한국정보과학회 2006 한국정보과학회 학술발표논문집 Vol.33 No.1
위치기반서비스나 텔레매틱스 등의 공간 정보에 기반을 둔 시설물 분야나 재해 분야에서 3차원 공간정보에 대한 사용이 광범위해지고, 3차원 공간 정보 생성, 구축 및 활용에 대한 연구는 더욱 더 활발히 진행되고 있다. 특히 세밀도(Level of detail-LOD)는 대용량의 3차원 공간 정보를 표현, 저장하기 위한 주요한 방법론으로 그에 관한 연구가 많이 진행되고 있는 실정이다. 본 논문에서는 서버/클라이언트 환경에서 대용량의 3차원 공간 데이터를 효율적으로 전송하기 위한 두 가지의 세밀도 모델을 제안한다. 그리고 두 세밀도 모델들의 데이터전송에 대한 효율성을 비교해 보았다.