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홍성일,이택승,이남관,Hong, Seong-Il,Lee, Taek-Seung,Lee, Nam-Gwan 한국섬유공학회 1990 한국섬유공학회지 Vol.27 No.7
Polypropylene was reacted with maleic anhydride to improve the dyeability. The modified polypropylene was characterized by T-lR, SEM, and elemental analysis. This maleic anhydride reacted polypropylene showed a good dyeability with basic dye and disperse dye. The crystallinity of modified polypropylene was decreased with increasing the maleic anhydride content reacted onto polypropylene. The inherent viscosity of modified polypropylene was decreased because the chain scission occurred during the reaction. Blends of Polypropylene and modified Polypropylene with energy quencher were dyed excellently with disperse dyes, while those without energy quencher were dyed excellently with basic dyes. Blends of Polypropylene and modified Polypropylene mixed with energy Quencher show a lower crystallinity than those mixed without energy quencher.
중금속 흡차능을 가지고 Chelate Resin의 합성
홍성일,전동원,서정옥,Hong, Seong-Il,Jeon, Dong-Won,Seo, Jeong-Ok 한국섬유공학회 1984 한국섬유공학회지 Vol.21 No.2
In this paper, two major interests, -i.e., synthesis of chloromethylstyrene, and transformation of crosslinked chlormethylpolystyrene into chelating resin-were extensively dealt. first of all, newer method for the preparation of pure o-, m- and p-chloromethylstyrene was investigated. Bromoethylbenzene was chloromethylated by conventional chloromethylation technique yielding mixture of isomers of o-, m-, and p-chloromethylbromoethylbenzene, then this mixture was fractionated preparatively as o-, and p-chloromethylbromoethylbenzene by silica fraction analysis method. This obtained o-, and p-isomers were dehydrobrominated respectively yielding o-, and p-chlormethylstyrene. Then this isomeric chloromethyl-styrene was analyzed by HPLC respectively. In the second place, crosslinked chloromethylpolystyrene beads were prepared directly from the polymerization of chloromethylpolystyrene were transformed into polyethyleneimine ligand type chelate resin by the cationic ring-opening graft copolymerization of 2-methyl-2-oxazoline on to chloromethylpolystyrene. Chelating abilities and capacities of these resins for various metals were extensively discussed and the structural effect of the resin bead on chelating capacities were detailed.
반응성염료의 합성에 관한 연구(I) -$\beta$-Sulfatoethylamino sulfone형 반응성 염료의 합성과 그의 응용-
홍성일,김희경,박상우,Hong, Seong-Il,Kim, Hui-Gyeong,Park, Sang-U The Korean Fiber Society 1982 한국섬유공학회지 Vol.19 No.2
$\beta$-sulfatoethylamino sulfone을 반응성기로 하는 반응성 염료를aniline을 출발물질로 하여 만든 p-aminophenyl $\beta$-sulfatoethylamino sulfone을 H-acid 와 pH 4 및 7에서 coupling시켜 얻었다. pH 4에서는 H-acid의 2위치에, pH 7에서는 H-acid의 7위치에 coupling되었으며, 이 염료들을 IR, UV-visible spectra, 황분석에 의해서 확인하였다. Reactive dyes with $\beta$-sulfatoethylamino sulfone as reactive component were synthesized via coupling of p-aminophenyl $\beta$-sulfatoethylamino sulfone with H-acid at pH 4 and 7. It was coupled at 2 prosition of H-acid at pH 4, and 7 position at pH 7. These dyes were identified by IR, UV-visible spectra and quantitative analysis of sulfur. The hydrolysis properties and the effect of salt, alkaline, and pH on dyeing were also investigated.
백래쉬가 존재하는 비선형 불확실 시스템의 외란관측기를 이용한 제어
홍성일,양진모,Hong, Seong-Il,Yang, Jin-Mo 한국군사과학기술학회 2008 한국군사과학기술학회지 Vol.11 No.2
Backlash in the actuator is one of the most important nonlinearities that limit the performance of speed and position control of mechanical systems. In this paper, we propose disturbance observers in order to estimate the effect of nonlinearities and cancel them subsequently. As a result the disturbance observers make the nonlinear system behave linearly. And finally we show that the disturbance observers guarantee the system robustness and the performance to reject the effect of backlash in the face of parameter uncertainties.
병렬형 모션 시뮬레이터의 기구학적 해석과 강인 궤적추종 PID 제어기의 설계
홍성일,Hong, Seong-Il 한국군사과학기술학회 2007 한국군사과학기술학회지 Vol.10 No.3
This article suggests an inverse kinematics analysis of a two degree of freedom spatial parallel motion simulator and design methodology of the robust PID controller. The parallel motion simulator consists of a fixed base and a moving frame connected by two serial chains, with each serial chain containing one revolute joint and two passive spherical joint. First, an inverse kinematics problems are solved in order to find the joint variable necessary to bring the end effector to track the desired trajectory. Second, an inverse optimal PID controller is proposed to track trajectories in the face of uncertainty. And the $H_{\infty}$ optimality and robust stability of the closed-loop system is acquired through the PID controller. Finally numerical results show the effectiveness of the PID controller that is designed by square/linear tuning laws.
홍성일 ( Seong-il Hong ),박지훈 ( Ji Hoon Park ),김현재 ( Hyun Jae Kim ),나경민 ( Kyung Min Na ),금명기 ( Myung Ki Keum ),박현주 ( Hyun Joo Park ) 한국정보처리학회 2019 한국정보처리학회 학술대회논문집 Vol.26 No.2
반려동물 기르는 1인 가구가 증가함에 따라 여건도 관리하기 쉽게 발전되어져야 하지만 아직까지는 더딘 상황이다. 1인가구의 경우 약속, 야근 등 예기치 못한 상황 발생 시 먹이 급여에 있어서 어려움을 겪는데 이를 해결하기 위해서 개발하게 되었다. 위 작품은 어플리케이션을 통하여 시간, 장소에 구애받지 않고 원격 배식이 가능하다. 뿐만 아니라, 예약 자동 배식 추가를 통해서 보다 편리함을 제공하고 여건을 개선하고가 개발하였다. As pet- one-person households increase, conditions must be developed to be easy to manage, but are still slow. In the case of single-person households, they have difficulty in feeding their food in case of unexpected situations such as appointments and night shifts. The above works can be distributed remotely regardless of time and place through the application. In addition, the addition of automatic booking service makes it possible to provide more convenience and improve the conditions.
홍성일(Seong-Il Hong),장은영(Eun-Young Jang) 한국정보기술학회 2009 한국정보기술학회논문지 Vol.7 No.6
To transmit information over a channel in the presence of noise, there needs some technique to code the information. This paper is the FPGA Implementation of Reed-Solomon Encoder that is one of Error control Codes. Reed-Solomon codes are block-based error control codes with a wide range of applications in digital communications. RS codes are strong on burst errors because it process signals as symbol. We simulate this system using Matlab from Mathworks and design it using System Generator from Xilinx. We refer Matlab source in Implementation of Reed-Solomon(255.223) Error Control Coding for Compressed Images. In order to verify this designed architecture, a Hardware co-simulation is used. Also resource of logic is examined in order to evaluate the performance.