유기광활성제 함유 PVA 필름의 광활성 및 항균특성

임기섭,오경화,Lim, Ki-Sub,Oh, Kyung-Wha 한국섬유공학회 2011 한국섬유공학회지 Vol.48 No.1

Antimicrobial PYA films containing various photoactivators were prepared using a solution casting method. Benzophenone, 4,4'-bis(dimethylamino )-benzophenone, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-4'-(methylthio)-2-morpholinopropiophenone, thioxanthen-9-one, and 4,4'-dihydroxybenzophenone were selected as the photoactive additives. The UV absorption, transmittance and radical formation, thermal stability, structural and antimicrobial properties of the prepared films were examined by ESR, UV-vis, DSC, XRD and an antimicrobial test. The results showed that the UV activated benzophenone, 4,4'-bis(dimethylamino)-benzophenone and thioxanthen-9-one provided excellent antimicrobial properties after UVA (365 nm) irradiation.

악성 흑색종과 기저세포암이 발생된 색소성 건피증

임기섭(Ghi Seob Lim),홍창권(Chang Kwun Hong),노병인(Byung In Ro),장진요(Chin Yo Chang) 대한피부과학회 1986 대한피부과학회지 Vol.24 No.6

Xeroderma pigmentosurn is a photosensitive hereditary disorder and especially rare in Korea. A 30-year old male patient had been suffered from walnut sized tumor and several ulcerated papules on the face, and scattered brownish macules on the sun-exposed area. Clinical features and histopathologic findings were consistent with malignant malanoma and basal cell epithelioma developing in a xeroderma pigmentosum respectively. Malignant melanoma was surgically excised.

면역억제제를 사용하여 유천포창 치료 중 대상 포진이 발생된

임기섭(Ghi Seob Lim),홍창권(Chang Kwun Hong),노병인(Byung In Ro),장진요(Chin Yo Chang) 대한피부과학회 1987 대한피부과학회지 Vol.25 No.5

A 47 year-old woman with generalized fresh tense or ruptured bullae was diagnosed as bullaus pemphigoid by histopathological and direct immunofluorescent test. We treated her with prednisolone and bethamethasone for 3 weeks. And soon after, herpes zoster developed along the right T9 dermatome. It is not precise whether true association or only incidental concomitance, but, there may be present some relatioship.

사출 도광판의 미세광학패턴 실측을 통한 광학 성능에 관한 해석적 연구

임기섭(K. S. Lim),한지호(J. H. Han),홍주표(J. P. Hong),주병윤(B. Y. Joo) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.10

This paper is an analysis on the uniform luminance distribution and micro-pattern replication ratio through the measure of micro-patterns on the injection-molded light guide plate. In this study, we measured micro-patterns on the 40 inch LGP that has the different form of micro-patterns. We measured a uniform array density pattern (micro lenticular lenses) and a non-uniform density array pattern (micro dots). The injection-molded LGP was divided into 40 areas, and micro patterns on the each area were measured by various measurement equipment. Applying measured results to the optical simulation, we found that the uniform pattern has over 95% of the luminance uniformity and non-uniform pattern has over 80% of the luminance uniformity.

적상 반상 경피증에서 이행되었다고 사료되는 선단 경피증

임기섭(Ghi Seob Lim),김명남(Myeung Nam Kim),홍창권(Chang Kwun Hong),노병인(Byung In Ro),장진요(Chin Yo Chang) 대한피부과학회 1986 대한피부과학회지 Vol.24 No.4

Clinically, the transformation of morphea to scleroderma is rare. We report a case suggested acroselerosis transformed from guttate morphea. Patient was 30-year old woman who had generalized bean-sized depigmented macules except face since early childhood. About one year ago, Raynauds phenomenon, edema and sclerotic change of the both hands and feet were developed. On the laboratory findings, there were positive reaction for rheumatoid factor and antinauclear antibody test and increase of erythrocyte sedimentation rate. Histopathologically, there were even increased collagen fibers, atherosclerotic change of the vessels and atrophic sweat glands.

가상 전시 공간의 길찾기 행태에 영향을 미치는 요인에 관한 연구

임기섭 ( Lim Ki Sup ),김태균 ( Kim Tae-kyun ) 한국디자인트렌드학회 2009 한국디자인포럼 Vol.24 No.-

예전에는 가상현실을 경험하는데 있어서 고가의 장비가 필요했지만 지금은 초고속 인터넷과 그래픽 기술의 발전으로 누구나 쉽게 접할 수 있게 되었다. 우리가 현실에서 길을 찾을 때는 다양한 환경 인지 정보와 자신의 경험을 통해 길을 찾는데 반해 가상현실에서는 대부분 시각적 정보에만 의존하여 길을 찾아야 하기에 길을 헤매거나 길을 잃기 쉽다. 따라서 가상 전시 공간에서 관람객이 길을 헤매지 않고 전시물을 보면서 다양한 경험을 하기 위해서는 시지각적인 요인을 적용한 관람객의 동선을 유도하는 제안 동선이 필요하다. 본 연구에서는 현실에서의 일반적인 행태에서 나타난 시지각적인 요인들 중에서 8가지 요인을 가상현실에 적용하여 나타나는 행태에 관하여 실험을 하였다. 이 실험을 통해서 길 선택을 하는데 성별의 차이는 영향이 없고, 시지각적인 요인 중에서 명암의 차이, 랜드마크의 유무, 폭의 차이, 종횡패턴이 길을 선택하는데 영향을 준다는 사실을 밝혔다. We can experience virtual reality world more by developing internet and graphic technology. We use a lot of information of environment and our experience to find way in real world. However we are easy to lose our way in virtual reality because we usually depend on visual information to find the way. Therefore, the audience should be able to move along the traffic line maximizing visual effect and perception, recommended by the designer. The line should be designed to allow audience to completely experience the exhibition without missing the path proposed by the designer. The experiment was based on the theory of David Dean. Among many elements of visual perception, eight elements was applied to methods finding the way at virtual reality world. By this experiment, we found out that the difference of brightness and width, breadth and application of landmark, and length have influence on finding way and the sex is unrelated.

현실과 가상공간의 행태 분석을 통한 제안 동선 연구

임기섭 ( Lim Kisup ),김태균 ( Kim Taekyun ) 한국디자인트렌드학회 2010 한국디자인포럼 Vol.27 No.-

현실공간을 그대로 재현한 가상현실을 미러월드라고 한다. 하지만 미러월드에 방문한 관람객은 시각적 정보에 의해서 길을 찾기 때문에 길을 잃기 쉽다. 그래서 관람객이 길을 찾을 수 있도록 시지각적인 요인을 적용한 제안동선이 필요하다. 현실과 가상현실 길찾기 행태의 차이를 알아보기 위해 현실 공간과 그 현실을 실제 재현한 가상 현실 공간에서의 길찾기 행태를 비교하기 위해 천안시 태조산에 위치한 `각원사`를 대상으로 실험을 진행하였다. 그 결과 현실과 가상현실 모두 길찾기의 행태가 동일하게 나타남을 알 수 있었고 왼쪽보다는 오른쪽에서 정보에 대한 탐색이 많이 이루어짐을 알 수 있었다. 앞에서 이루어진 이론 고찰과 실험을 통해 밝혀진 요인을 적용하여 독립기념관을 대상으로 두 번의 실험을 진행하였다. 1차 실험에서는 독립기념관의 제 3 전시관을 동일하게 제작하여 시지각적 제안동선 유도 요인을 주지 않고 독립기념관에서 제시한 제안 동선과 비교하였고, 2차 실험에서는 시지각적 요인을 주고 제안 동선을 비교하였다. 그 결과 시지각적 요인을 적용하면 디자이너가 원하는 제안 동선으로 관람객을 유도할 수 있음을 발견할 수 있었다. Mirror World means the virtual reality world reconstructing the reality world. But audience visiting the Mirror World is easy to lose the way, because they should find the way by only visual information. Therefore, we suggest traffic flow approach factored in visual perception which the audiences can find the right way. The experiment is figuring out the difference of method, finding the way between real world and virtual reality world. We carried out the experiment at Gakwonsa in Taejosan. According to the experiment, we found out methods using to find way in real world and we found out the method applying in virtual reality world. And we found the fact that people take more information from right side than the left side of environment. Additional experiments were performed in Independence Hall based on the results of previous experiments. First experiment was performed at third pavilion of Independence Hall and we didn`t give the elements of visual perception information and compared traffic flow in Independence Hall, Second experiment was given performed and we compared traffic flow in Independence Hall, As a result we found out that if we give the elements of visual and perception information for the audience, they follow traffic flow recommended by designer.

투습방수 성능 제어가 가능한 Vistamaxx/Polypropylene Side-by-Side 복합방사 멜트블론 부직포 특성

양병진,임기섭,Yang, Byung-Jin,Lim, Ki-Sub 한국섬유공학회 2016 한국섬유공학회지 Vol.53 No.2

Bicomponent nonwoven fabric was developed by using a melt-blown process to replace a Gore-Tex membrane with water repellency and vapor permeability in outdoor clothing. In this research, bicomponent meltblown spinning by using a S/S (side-by-side) type nozzle was used for nonwoven with a small fiber diameter, water repellency, and water vapor permeability. Vistamaxx with good adhesion was mixed with VMPP (Peroxide/PP match batch chip, Manntek Co.) as a viscosity control material to increase the melt flow index (MFI) for a small diameter of the fiber. In addition, polypropylene (PP) was used by stabilizing the viscosity of the nonwoven. In the results, the average diameter of the fiber was approximately $2.15-2.52{\mu}m$. The diameter of the fiber was decreased by increasing the melt-spinning temperature and air flow pressure. We confirmed that the water repellency was improved by increasing the fiber density in a small-diameter process.

리싸이클 폴리에스터 니트 소재의 물리적 성질 및 태 평가

최연주,김성훈,임기섭,Choi, Yeon-Joo,Kim, Seong-Hun,Lim, Ki-Sub 한국섬유공학회 2012 한국섬유공학회지 Vol.49 No.2

With regards to environmental conservation, it is necessary to promote an eco-friendly industry and to recycle wastes. In this study, the physical properties and hand values of material recycled PET knit fabrics prepared with various recycled PET yarns were investigated. Bursting strengths of 3 recycled PET knit fabrics were higher than that of regular PET knit fabric. 3 Recycled PET knit fabrics were more flexible than those of the regular PET knit fabric. Lightness of regular PET knit fabric was the highest among the 5 samples. Fabric knitted with recycled non-circular PET yarns had a more yellowish tinge. Mechanical properties were measured using the KES-FB system. Bending properties, shear properties, weight, and thickness were increased in recycled PET knit fabrics. The compressional linearity and energy of 3 recycled PET knit fabrics increased. However, their compressional resilience was reduced. In addition, coefficients of friction were similar. Regular PET knit fabric demonstrated a smooth appearance. Numeri was the highest in the hand values.

재활용 폴리에스터 칩의 물성 향상 연구

최연주,이중규,김성훈,임기섭,이주형,이준희,Choi, Yeon-Joo,Lee, Jung-Gyu,Kim, Seong-Hun,Lim, Ki-Sub,Lee, Joo-Hyung,Lee, Jun-Hee 한국섬유공학회 2011 한국섬유공학회지 Vol.48 No.2

To improve the physical properties of recycled polyester chips, virgin PET chips were compounded with the ratio of 20 wt%, 40 wt%, and 70 wt%. Recycled PET chips blended with virgin PET chips exhibited decreased molecular weights and intrinsic viscosities compared with 100% recycled PET chips and virgin PET chips, and this was caused by thermal and hydrolytic decomposition. End-group contents and MFI both increased in the blended PET chips. As the virgin PET chip contents increased in the recycled PET chips, the melting temperature tended to increase. Recycled PET chips exhibited a higher crystallization temperature compared with virgin PET chips. Morphologies of recycled PET films were analyzed by scanning electron microscopy (SEM). Yellowing of recycled PET chips resulted from intramolecular cross-linking and oxidation reactions. As virgin PET chips were compounded with recycled PET chips, yellowing was reduced. The ash contents were increased in the recycled PET chips which were blended with virgin PET chips. As recycled PET chip contents were similar to those of virgin PET chips, the ash contents were the highest in the experimental materials.