• 천문학회지
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• 제51권4호
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• pp.89-110
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• 2018

Active Galactic Nucleus (AGN) variability can be used to study the physics of the region in the vicinity of the central black hole. In this paper, we investigated intra-night optical variability of AGN in the COSMOS field in order to understand the AGN instability at the smallest scale. Observations were performed using the KMTNet on three separate nights for 2.5 to 5 hours at a cadence of 20 to 30 min. We find that the observation enables the detection of short-term variability as small as ~ 0.02 and 0.1 mag for R ~ 18 and 20 mag sources, respectively. Using four selection methods (X-rays, mid-infrared, radio, and matching with SDSS quasars), 394 AGN are detected in the $4deg^2$ field of view. After differential photometry and ${\chi}^2$-test, we classify intra-night variable AGN. The fraction of variable AGN (0-8%) is statistically consistent with a null result. Eight out of 394 AGN are found to be intra-night variable in two filters or two nights with a variability level of 0.1 mag, suggesting that they are strong candidates for intra-night variable AGN. Still they represent a small population (2%). There is no sub-category of AGN that shows a statistically significant intra-night variability.

• 한국콘텐츠학회논문지
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• 제9권12호
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• pp.103-112
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• 2009

제품 디자인 기술의 발달로 다양한 컨셉의 제품들이 개발되고 있고 사용자 맞춤형 디자인 컨셉에 따른 제품이 활발하게 출시되고 있다. 성공적인 개발을 위해서는 컨셉을 제품 개발 프로세스에 정확히 전달하여야 목표하는 디자인을 개발할 수 있다. 제품 개발 목적에 맞는 디자인 컨셉을 찾기 위해서 붐박스를 겸한 모바일 폰에 대한 디자인 컨셉을 감성적 어휘 표현으로 찾아내고 해당 목표에 맞는 시각적 이미지를 이용하여 컨셉 목표를 구체화했다. 컨셉 목표를 구체화하기 위하여 개발에 참여하는 이해당사자가 서로 합의할 수 있는 이미지를 선정을 목표로 참여자 간의 의견 조율을 위한 테스트를 실시하였다. 본 연구에서는 합리적인 선택을 위하여 테스트 결과를 클러스트링 기법을 이용하여 컨셉과 이미지 선정을 위한 방법을 제안하고자 하였다. 이러한 방법은 디자인 컨셉을 설계하고 목표에 맞은 GUI 구현에 기여할 것으로 보인다.

• 한국항만경제학회지
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• 제24권4호
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• pp.385-406
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• 2008

본 논문는 환동해권에서 입지적 우위를 갖는 강원도의 항만물류산업 활성화 방안을 모색함으로써 지역경제발전에 기여하고자 하였다. 본 논문은 강원도 항만물류산업의 활성화방안을 강원도와 정부 측면으로 구분하여 제시하였다. 강원도 차원에서는 국제물류 환경변화에 따른 거점 항만의 지정 및 개발, 환동해권 주요 항만간 네트워크 및 전자항만 시스템의 구축, 그리고 항만배후지 지원을 위한 자유무역지대나 경제자유지역 같은 경제특구의 조성 및 확대 방안을 제시하였다. 또한 배후단지에는 환동해권의 자원과 관련된 산업을 유치 및 육성하는 것이 효과적이라는 것과 적극적인 항만물류마케팅 활동의 추진을 주문하였다. 정부 차원에서는 강원도 항만에 대한 직접적인 접근성 및 연계성 확대를 위한 SOC 투자 확대 방안과 정부의 서남해안 위주 항만개발정책의 전환을 통한 강원도 항만에 대한 적극적이고 효율적인 지원을 요구하였다. 끝으로 항만물류 분야의 첨단화와 글로벌화가 급속히 확대되는 상황에서 종합적인 전문물류인력양성 기관의 설치 및 지원이 필요함을 제시하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
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• pp.346-348
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• 2004

In this rarer, we introduce a new Fuzzy Polynomial Neural Networks (FPNNs)-like structure whose neuron is based on the Fuzzy Set-based Fuzzy Inference System (FS-FIS) and is different from that of FPNNs based on the Fuzzy relation-based Fuzzy Inference System (FR-FIS) and discuss the ability of the new FPNNs-like structurenamed Fuzzy Set-based Polynomial Neural Networks (FSPNN). The premise parts of their fuzzy rules are not identical, while the consequent parts of the both Networks (such as FPNN and FSPNN) are identical. This difference results from the angle of a viewpoint of partition of input space of system. In other word, from a point of view of FS-FIS, the input variables are mutually independent under input space of system, while from a viewpoint of FR-FIS they are related each other. In considering the structures of FPNN-like networks such as FPNN and FSPNN, they are almost similar. Therefore they have the same shortcomings as well as the same virtues on structural side. The proposed design procedure for networks' architecture involves the selection of appropriate nodes with specific local characteristics such as the number of input variables, the order of the polynomial that is constant, linear, quadratic, or modified quadratic functions being viewed as the consequent part of fuzzy rules, and a collection of the specific subset of input variables. On the parameter optimization phase, we adopt Information Granulation (IG) based on HCM clustering algorithm and a standard least square method-based learning. Through the consecutive process of such structural and parametric optimization, an optimized and flexible fuzzy neural network is generated in a dynamic fashion. To evaluate the performance of the genetically optimized FSPNN (gFSPNN), the model is experimented with using gas furnace process dataset.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2009년도 추계학술발표대회 논문집
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• pp.207-212
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• 2009

This research is focused on the 'Resident-participated Workshop' which targets the improvement of residential environment of apartment complex from the residents' point of view. The purpose of the workshop is to induce the residents interest and encourage them to participate in design process, thus, residents will be satisfied with the result with affection and achievement. This research aims the effectiveness of 'Resident-participated' design plan as a program which enables them to maintain and self manage in the long run. The object of this research was the public space within the apartment complex of Susojugong Rental Apartment Complex in Gangnam-ku, Seoul and followings are the contents; 1. Method of 'Resident-participated Workshop'. 2. Program of 'Resident-participated Workshop'. 3. Design analysis of improved apartment complex through 'Resident-participated Workshop' and selection. As a result, it was noticeable that 'Resident-participated Workshop' was an important factor in decision making of designs from the very first stage through communication. As a part of workshop program, design game used cubic models which was useful to enhance the understanding of the participants. It also induced the cubic conception so that intercommunication with the design specialists was possible. But, the development of various workshop method to increase the residents' interest and participation is necessary, especially, program development is required to change the residents' attitude towards the design plan. It is anticipated that a continuous related research is neccsary in this regard.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권4호
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• pp.1562-1578
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• 2020

Vector data compression algorithm can meet requirements of different levels and scales by reducing the data amount of vector graphics, so as to reduce the transmission, processing time and storage overhead of data. In view of the fact that large threshold leading to comparatively large error in Douglas-Peucker vector data compression algorithm, which has difficulty in maintaining the uncertainty of shape features and threshold selection, a segmented Douglas-Peucker algorithm based on node importance is proposed. Firstly, the algorithm uses the vertical chord ratio as the main feature to detect and extract the critical points with large contribution to the shape of the curve, so as to ensure its basic shape. Then, combined with the radial distance constraint, it selects the maximum point as the critical point, and introduces the threshold related to the scale to merge and adjust the critical points, so as to realize local feature extraction between two critical points to meet the requirements in accuracy. Finally, through a large number of different vector data sets, the improved algorithm is analyzed and evaluated from qualitative and quantitative aspects. Experimental results indicate that the improved vector data compression algorithm is better than Douglas-Peucker algorithm in shape retention, compression error, results simplification and time efficiency.

• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.1125-1125
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• 2001

Micro-scale test methods are producing small-sample size where the conventional physical and chemical tests can not be used (high standard deviation, uncertain sampling conditions, low repeatability). Different small-scale test methods were developed recently for determination of physico-chemical, functional, rheological properties of wheat or wheat dough using miniaturized instruments with sophisticated sample preparation/handling and mechanics (RVA, 2 g mixograph, micro-Z-arm mixer, small-scale noodle maker, micro-baking method etc.). The small-scale methodologies can be used as basic research tools or as technology supported measurements and can be also essential in the early selection for quality traits in breeding programs. The milling as a sample preparation step is essential procedure providing good quality flour or semolina samples from small amount of grain (5-10 g) in a reproducible and reliable way. The aim of present study was to use NIR as quality control tool, and to evaluate the recently developed and manufactured micro-scale lab mill (FQC-2000) produced by Inter-Labor Co. Ltd., Hungary. The milling characteristics of the new instrument were compared to other laboratory mills and the effects of milling action on the chemical composition of fractions were analysed. The fractions were tested with both chemical and near infrared spectroscopic methods. The micro-scale milling resulted significantly different yields, particle size distributions and different fractions from compositional point of view. The near infrared spectra were sensitive enough to distinguish the fractions obtained by different milling procedures. Quantitative NIR calibration equations were developed and tested in order to measure the chemical composition of characteristic milling fractions. Special qualification procedure the PQS (Polar Qualification System) method was used for detecting the differences between fractions obtained by macro and micro-milling procedures. The results and the limitations of PQS method in this application will be discussed.

• 한국산학기술학회논문지
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• 제12권5호
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• pp.2124-2132
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• 2011

이 연구의 목적은 u-Campus 환경에서 교수능력(teaching skill)을 향상시키기 위한 평가시스템을 설계 개발하는데 있다. 이러한 목적을 달성하기 위하여 수업효율성과 교수평가에 관한 이론을 고찰 분석하여 시스템에 포함되어야 할 효율적인 교수능력향상 평가 요소를 추출하였다. 추출된 평가요소를 바탕으로 u-Campus 환경에서 교수능력 향상을 위한 교수평가, 코칭, 자기성찰, 포트폴리오, 평가자 선정 및 포트폴리오 공유에 대한 교수자 권한, 유비쿼터스기술 등을 반영하여 시스템을 설계하고 프로토타입(prototype)을 개발하였다. 프로토타입의 개발은 기존의 평가 방법과 달리 교수 자신의 평가에서 시작하여 본인의 의지에 따라 평가자를 확대하기 때문에 평가에 대한 부담을 덜며 교수능력을 향상시킬 수 있다. 포트폴리오와 유비쿼터스 기술을 적용한 교수평가 시스템은 u-Campus 환경에서 진정한 교수능력 향상을 위한 새로운 평가 방법의 대안이 될 것이며 대학교육의 질적인 발전에 도움이 될 것이다.

• 한국실내디자인학회논문집
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• 제38호
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• pp.3-13
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• 2003

Now that 15 years have passed since its introduction to 4 year college in Korea and we have 51 majors in the field of Intoner design established at 47 universities as of 2003, we are in the position to seek the improvement of its educational qualify. With a view to provide data for the setup of proper educational purpose, it has classified their divisions(departments) according to their major names and belonged colleges of the universities and considered their geographical distributions, groupings of curriculum, their framing and features of a standard curriculum. 1)Divisions of the universities where the major of interior design belongs are divided into three categories of design division (design 8t arts, arts), home economics division (home economics, natural science) and architectural division. For the development of the major, universities to which circumstances permit are recommended to establish an independent college of interior design following the . cases in the US. 2) Geographical preponderance of interior design major on Seoul and Gyeongsang Province is desired to be improved. 3) Curriculum of interior design, which is classified into introduction, history of interior design, theory of interior design, design of interior space, digital technology, design elements of inner space, technology of interior design, behavior of environmental psychology, design management and other subjects, was made into a table by divisions. To sum up, curriculum of interior design concentrates on basic design theory throughout all divisions. In connection with the selection of division by high school-graduates or their parents, design division is recommended for those who desire to major in design elements and design management, home economics division for those who desire to major in space design and behavior of environmental psychology and architectural division for those who desire to major in Interior space design, interior design technology and regulations. 4) This research can contribute to the settlement of desirable curriculum for the interior design education, thus upgrading the education level of the major in Korea.

• Journal of Microbiology and Biotechnology
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• 제19권5호
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• pp.462-467
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• 2009

Cyclosporin A (CyA) produced by Tolypocladium inflatum is a promising drug owing to its immunosuppressive and antifungal activities. From an industrial point of view, the necessity to obtain a suitable and economic medium for higher production of CyA was the aim of this work. The present study evaluated the effect of different fermentation parameters in solid state fermentation, such as selection of solid substrate, hydrolysis of substrates, initial moisture content, supplementation of salts, additional carbon, and nitrogen sources, as well as the inoculum age and size, on production of CyA by Tolypocladium inflatum MTCC 557. The fermentation was carried out at $25{\pm}2^{\circ}C$ for 9 days. A combination of hydrolyzed wheat bran flour and coconut oil cake (1:1) at 70% initial moisture content supported a maximum production of $3,872{\pm}156\;mg$ CyA/kg substrate as compared with $792{\pm}33\;mg/kg$ substrate before optimization. Furthermore, supplementation of salts, glycerol (1% w/w), and ammonium sulfate (1% w/w) increased the production of CyA to $5,454{\pm}75\;mg/kg$ substrate. Inoculation of 5 g of solid substrate with 6 ml of 72-h-old seed culture resulted in a maximum production of $6,480{\pm}95\;mg$ CyA/kg substrate.