PTT/PET블랜드의 열적 특성 및 결정화 거동 고찰

이석,유희재,강호종 한국고분자학회 2001 한국고분자학회 학술대회 연구논문 초록집 Vol.2001 No.4

건축 설계 지원을 위한 증강현실 시스템

이석한(Seok-Han Lee) 한국정보기술학회 2017 Proceedings of KIIT Conference Vol.2017 No.6

사토 하루오「아름다운 마을」의 정치적 미의식

이석 한국일어일문학회 2018 日語日文學硏究 Vol.107 No.2

Criticizing translation of Oscar Wilde’s work, Sato Haruo made his debut as an artist. In his critical review, Sato asserted that the leitmotif of Wilde is the “highbrow thought and feeling,” but the translation failed to deliver this thought and feeling to the reader. Especially, Sato made clear that he agreed with the highbrow minority although the ordinary majority had the actual power. In this way, Sato interpreted Wilde’s aesthetics as the conflict of the majority and the minority. Influenced by Wilde’s thought, Sato developed his unique literary theme. Sato’s aesthetics is best realized in his utopian novel, “Beautiful Town.” Narrating the process of building an ideal town, “Beautiful Town” has a scene that ‘many people’ encountered the ‘beautiful town’ and were extremely wondered. The scene tells that the purpose of building the ‘beautiful town’ was to dissimilate the routine life of ‘many people.’ We can assume from this fact that the “Beautiful Town” is a typical utopian novel. However, the ‘beautiful town’ had an exceedingly closed structure that prohibited many people’s access. Besides, the inner part of the ‘beautiful town’ was hidden, and only the beauty of the town was emphasized. Because of this exclusiveness of the ‘beautiful town’, many people’s life could not be thoroughly dissimilated. In this part, “Beautiful Town” reveals Sato’s political thoughts. Sato tried to enlighten the vast majority through beautiful art, but he loathed the idea that his art could be relativized by the mass. Because of this thought, Sato’s literature reveals not only elitism but also its autistic structure. 佐藤春夫はオスカーワイルドの翻訳文を批評した文章を通して文壇にデビューした。この文章で佐藤はワイルドの主題は「高踏的な思想感情」にあり、翻訳文はそれを可能な限り生かすべきであると主張する。とくに佐藤は権力を持っているのは平凡な多数者であるが、自分は特別な少数者に賛同していることを明らかにした。こうして佐藤はワイルドの芸術至上主義から多数者と少数者の葛藤関係を読み取り、それに基づいて自分の文学世界を展開するようになる。 以上のような佐藤の芸術観は彼のユートピア小説「美しき町」を通して実現される。「美しき町」は芸術家たちが理想の町を建設するために奮闘する姿が描かれているが、その中で「多くの人々」が<美しい町>に遭遇して驚く場面が出てくる。この場面を通して主人公たちが計画する<美しい町>の目的は「多くの人々」が住んでいる日常生活を異化するためであることが確認される。このような内容のために「美しき町」はユートピア小説として読められる。 しかし、作品のなかで描かれる<美しい町>は非常に閉鎖的な構造をもっており、「多くの人々」の接近を禁じている。そのうえ、<美しい町>の内部は隠蔽され、町の美しさのみが際立つ。こうした<美しい町>の排他性のために「多くの人々」は十分に異化できない。ここに佐藤春夫の政治性があらわれる。佐藤は美しい芸術を通して多数の一般大衆を啓蒙しようとする考えは持っているが、その一般大衆によって自分の芸術が相対化されることを忌み嫌っている。そのために佐藤の文学はエリート主義を見せると同時に自閉的な限界も露呈しているのである。

플러렌 변성 폴리스티렌의 물성에 관한 연구

이석,김환기,김건형,김정안,강호종 한국섬유공학회 2004 한국섬유공학회지 Vol.41 No.5

Star-shaped polystyrenes with the [60]fullerene core were synthesised via anionic polymerization. The solution, thermal, and UV absorbance properties were investigated as a function of number of branched polystyrene chains on the [60]fullerene core. The solution viscosity (intrinsic viscosity) of the [60]fullerene-modified polystyrene decreased with the number of branching due to molecular entanglement. The better coating property of the [60]fullerene-modified polystyrene compared with those of the polystyrene/[60]fullerene mixtures seems to arise from a lower aggregation state of the [60]fullerene core induced by the branched polystyrene chain. An increase in the glass transition temperature of the modified polystyrene with the number of branched chains was observed as well.

이용자 품질지각 관점에서 본 모바일 버스 결제 앱의 지속적 이용 의도에 관한 연구

이석,손총영 한국컴퓨터정보학회 2022 韓國컴퓨터情報學會論文誌 Vol.27 No.9

Based on the success model and Expectation Confirmation model of information system, the concept model of mobile bus payment App users' willingness to continue using is constructed by introducing function quality and interface design quality. A total of 264 valid questionnaires are obtained by issuing online questionnaires, and the model is tested by SmartPLS3.0 software The results show that users' perceptions of information quality, system quality and interface design quality will affect users' perceived usefulness and satisfaction through the scene, and then affect users' willingness to continue to use; Perceived functional quality has a significant impact on perceived usefulness, but has no significant impact on satisfaction. Perceived usefulness has a significant impact on user satisfaction. 본 연구는 D&M 모델과 ECM모델을 기반으로 소비자가 대중교통 모바일 결제 앱을 지속적으로사용하는 데 영향을 미치는 연구 모델을 구축하였다. 온라인 설문조사를 통해 중국 베이징지역에서 264개의 유효한 설문지를 획득하여 Smartpls3.0으로 분석하였다. 연구 결과는, 지각된 정보의질, 지각된 시스템의 질, 그리고 지각된 인터페이스 설계의 질은 지각된 유용성과 만족을 통하여소비자 지속적 사용의도에 유의한 긍정적 영향을 미치는 것으로 나타났다. 지각된 기능의 질은단지 지각된 유용성만을 통해 지속적 사용의도에 긍정적인 영향을 미치는 것이다.

635 nm Photodynamic Therapy (PDT)를 이용한 개의 난치성 외이염 치료

이석만,조은상,임현수,김아름,손화영 한국임상수의학회 2014 한국임상수의학회지 Vol.31 No.1

Photodynamic therapy (PDT) is an effective method for infectious disease, but as yet, no clinical trial onotitis externa has been conducted in animals. This report describes 4 cases of PDT treatment on severe otitis externain canine. Four canines were treated with various concentrations of 5-aminolevulinic acid hydrochloride (5-ALA) andwith various J (second × power) and irradiated by light-emitting diode light source at 635 nm, respectively. After thePDT applications, canines incubated in the dark for 5 or 6 hr. All patients showed clinical resolution of otitis externaafter PDT treatment at the dose of 0.16~0.3 g ALA and J (54~162 J/cm2). On the basis of these findings, PDT canbe considered to be a new therapeutic approach to severe otitis externa in canine.

M2 Tidal Current Estimation from One-day Observation Data off the Western and Southern Coasts of Korea

이석,오경희,장성태,유학열,송규민 한국해양과학기술원 2019 Ocean science journal Vol.54 No.1

A practical method to estimate the M2 tidal current is proposed based on one-day current observations. In this method, the semi-diurnal constituent, composed of several constituents within the semi-diurnal frequency band that cannot be resolved from one-day observations, is corrected to the M2 constituent using the amplitude ratio and phase difference between each constituent. The dominant M2 constituent is accurately estimated from the semi-diurnal constituents. However, this method is not always successful for application to diurnal constituents that are much weaker than the M2 constituent. The accuracy of the method depends on the signal-to-noise ratio and the time of observation. Observations conducted during the spring tide period are highly recommended to reduce calculation error. This method was applied along the western and southern coasts of Korea, where the semi-diurnal tidal current is the most predominant component of water circulation. In this study, six major constituents (M2, S2, N2, K2, O2, and 2N2) that are dominant in the semi-diurnal frequency are used for correction of the M2 tidal current. Correction coefficients for S2 and N2 used were the average values from 122 sets of one-month current observations, which have a relatively uniform spatial distribution in the study area. For correction coefficients of K2, v2, and 2N2, we used wellknown constant values determined from the relationships among astronomical forcing factors. The M2 tidal currents after correction are generally well matched to those calculated with the numerical model. The discrepancy between results is mainly due to the complex bathymetry and coastline in the study area, which cannot be fully resolved with a numerical model. A spatial distribution map of the M2 tidal current based on observations in this area is presented for the first time. The method proposed in this study can be used for planning efficient observation of tidal currents.

여현변환 계수를 이용한 이미지 탐색 알고리즘

이석한 한국정보전자통신기술학회 2019 한국정보전자통신기술학회논문지 Vol.12 No.1

The content based on image retrieval makes use of features of information within image such as color, texture and share for Retrieval data. we present a novel approach for improving retrieval accuracy based on DCT Filter-Bank. First, we perform DCT on a given image, and generate a Filter-Bank using the DCT coefficients for each color channel. In this step, DC and the limited number of AC coefficients are used. Next, a feature vector is obtained from the histogram of the quantized DC coefficients. Then, AC coefficients in the Filter-Bank are separated into three main groups indicating horizontal, vertical, and diagonal edge directions, respectively, according to their spatial-frequency properties. Each directional group creates its histogram after employing Otsu binarization technique. Finally, we project each histogram on the horizontal and vertical axes, and generate a feature vector for each group. The computed DC and AC feature vectors bins are concatenated, and it is used in the similarity checking procedure. We experimented using 1,000 databases, and as a result, this approach outperformed the old retrieval method which used color information. 내용기반 영상검색은 영상 내의 정보인 색상, 질감, 형태 등의 특징 값을 추출하여 검색에 이용한다. 본 논문에서는 8x8 이산여현변환, 즉 8x8 DCT(Discrete Cosine Transform) 후 얻어지는 DC, AC계수를 이용하여 필터뱅크(filter-bank)를 생성하고, 이를 영상의 내용기반 검색에 이용하는 검색방법을 제안한다. 제안된 방법은 생성된 DCT 필터뱅크에서 DC성분과 주요한 AC성분인 AC01, AC10, AC11 만을 이용하며, DC성분에 대한 양자화를 수행하여 계산량을 최소화한다. 그리고 양자화된 DC성분에 대한 히스토그램 정보를 기반으로 영상 검색에 필요한 특징 값을 산출한다. AC성분에 대해서는 Otsu 이진화를 통하여 개괄적인 형태정보를 취득한 다음 이에 대한 수평/수직 방향으로의 투영 히스토그램을 계산하여 특징 값을 취득한다. 추출된 AC성분의 특징 값은 DC성분의 특징 값과 함께, 특징벡터 빈(feature vector bins)을 구성하여 검색을 수행한다. 실험은 1000장의 데이터베이스를 이용하여 수행 되었으며, 기존의 색상정보를 이용한 검색방법보다 우수한 성능을 보임을 확인하였다

서비스 로봇을 위한 인지적 인간-로봇 상호작용

이석한,최종무,백승민 한국통신학회 2004 정보와 통신 Vol.21 No.10

CRE: 인간-로봇 상호작용을 위한 인지기반 행위제어 소프트웨어

이석한(Sukhan Lee),백승민(Seungmin Baek),박연출(Yeonchool Park) 한국정보과학회 2006 정보과학회지 Vol.24 No.3

서비스 로봇의 지각과 행동에서의 신뢰성은 각 개별 요소기술의 완벽함으로부터 얻어지는 것이 아니라 비록 성능이 불완전한 요소기술들을 사용하더라도 각 요소기술들의 정보를 융합하고 능동적인 행위를 발생시키는 시스템적인 접근방식으로부터 얻어진다. 그러므로 본 연구에서는 자연스러운 HRI 구현을 위하여 “로봇인지 엔진”이라는 독창적인 통합 구조를 제안하였으며, 비동기/병렬 정보처리 구조, 다양한 지각정보들의 융합, 행위 결합을 위한 능동적인 지각정보 수집의 특징을 갖는다.