• 해양환경안전학회지
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• 제22권1호
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• pp.52-58
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• 2016

본 연구에서는 국내의 공시된 545종의 위험유해물질의 국제 해상운송위험물 코드를 포함한 다양한 물질 고유번호들을 수집하고 물질정보와 위험성에 대해 조사한 후, 이미 개발된 미국, 일본, 유럽형 데이터베이스를 참고하여, 해상 운송되는 국내 HNS의 물질정보와 폭발성과 부식성을 포함한 거동특성에 대한 자료를 취합한 한국형 위험유해물질 데이터베이스를 구축하였다. 또한 기존 육상 환경위주의 위험유해물질의 데이터베이스의 문제점과 혼합물 위험유해물질의 물질정보의 부재를 포함한 해결해야할 문제점을 보고하였다. 해양유출사고에 대비한 데이터베이스의 구조를 국내 해양환경에 맞는 기본모델을 구축하고 추후 확장 데이터베이스 구성에 대한 개선안을 제시하였다.

• 한국IT서비스학회지
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• 제21권4호
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• pp.123-140
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• 2022

In the ever-increasing online secondhand product market, the perceived risk of online used products purchase was identified as a factor influencing consumer purchase intention. The results of this study are as follows. First, the relationship between the perceived risk of online secondhand purchase and purchase intention was presented with somewhat different results for each sub-risk factor. First of all, a significant negative causal relationship between physical risk, time loss risk, psychological risk, social risk and online used product purchase intention was verified. On the other hand, financial risk and functional risk did not show a statistically significant relationship with online used products purchase intention. Second, as a result of research on the moderating effect of purchasing experience, offline purchasing experience of used products and online purchasing experience were verified differently. First of all, the moderating effect of the online purchase experience of used products was significant only in the relationship between psychological and social risks on the intention to purchase used products online. The experience of purchasing used products online is believed to reduce uncertainty about the surrounding response to purchasing used products online and weaken the intention to purchase used products online by reducing tension and concerns about purchasing them. Other risks, such as financial risk, performance risk, physical risk, time loss risk, and online purchase experience of used products, were verified to have no significant effect on online used products purchase intention. In addition, the offline purchase experience of used products did not verify a significant moderating effect on the effect of all perceived risks on online used product purchase intention.

• 한국실내디자인학회논문집
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• 제20권1호
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• pp.80-88
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• 2011

Designs of Takashi Sugimoto suggested new concepts on the space after broking out fixed ideas, and attempted spatial expressions differently from existing interior decorations through independent thoughts and new interpretations. It is showing orientalism's influences strongly based on Japanese traditional beauty unlike western country's design trends. Takashi Sugimoto is implementing unique own design viewpoints by using materials in nature rather than artificial ones, and stressing extra ordinary view of the world having been edited with daily life through traditions and local cultures along with recycling old daily goods and wastes rather than pursuing modem and futuristic spatiality. Sugimoto thought that beautiful designs and uncommon ideas could be gotten from simple daily experiences, and thus materialized it with a technique of extraordinary daily life's implementation through such design viewpoints. Also, He pursues designs in which dense communications are made variously between spaces, space and user, and this becomes design techniques having been used mostly in his projects. It creates soft boundaries through using certain objet as an intermediate of doing communication or erasing physical boundaries, and then induces close communication within the space. This design viewpoints and techniques of Takashi Sugimoto have directed own discriminated designs nowadays.

• 대한안전경영과학회지
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• 제8권6호
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• pp.91-108
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• 2006

RFID/USN is important infrastructure of the ubiquitous society. And so, It is various and practical research is attempted. These two base technology have physical characteristic and complement relationship. Like this relationship is applied Following example that is system research which manages warehouse stocks and conditions. First, We adhere RFID Tag at the Pallet of the warehouse and do identification goods. And then, It grasps the environment state information of stocks with sensor module which has Zigbee wireless communication function. From like this process RFID Tag information and jop-control command of sensor node also it is exposed to air. Therefore, We control sensor node in USN/RFID environment through the mobile device. And system design for the security Apply of the process is main purpose of this paper's. We propose the condition and function of the mobile device to the secondary. And We define the relation of the sensor node with RFID to be arranged to a warehouse. Finally, This paper is designed to find a trade-off of the following viewpoints. First, We offer suitable sensor-control information to a actual manager. Second, We offer RFID tag security approach to control the action of the sensor. Third, It increases the survivability of sensor node form.

• Industrial Engineering and Management Systems
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• 제7권3호
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• pp.257-265
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• 2008

This paper deals with the joint decisions on pricing and ordering for a monopolistic retailer who sells perishable goods with a fixed lifetime or demand period. The newsvendor-typed problem is formulated as a two-period inventory system where the first period represents the inventory of fresh or new-arrival items and the second period represents the inventory of items that are older but still usable. Demand may be for either fresh items or for somewhat older items that exhibit physical decay or deterioration. The retailer is allowed to adjust the selling price of the deteriorated items in the second period, which stimulates demand and reduces excess season-end or stale inventory. This paper develops a stochastic dynamic programming model that solves the problem of preseason decisions on ordering-pricing and a within-season decision on markdown pricing. We also develop a fixed-price model as a benchmark against the dual-price dynamic model. To illustrate the effect of the dual-price policy on expected profit, we conduct a comparative study between the two models. Extension to a generalized multi-period model is also discussed.

• 한국응용과학기술학회지
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• 제10권1호
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• pp.49-55
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• 1993

Ground Calcium Carbonate, among paper coating pigments, will influence less dispersant demand, less binder demand, increase coating solids from 58% to 70%, which means high speed coating, less shrinkage during drying, less energy consumption, more uniform coverage of fibers. The quality point of view of Ground Calcium Carbonate, brightness, particle size, Particle size distribution, hardness, impurities content are important. More important factors of Ground Calcium Carbonate which influence the paper coating process are dispersion mechanisms and their effects. The study was made to investigate the effect of Ground Calcium Carbonate dispersion by sodium salt of polyacrylate dispersant composition and dispersion condition. Basic tests such as physical, optical and chemical were perfumed, and dispersion effects were investigated by different conditions. The results showed that the type of dispersant affected the dispersion effects, and the Ground Calcium Carbonate has critical dispersant demand.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.1141-1145
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• 2005

This paper proposes a robust tension control algorithm for the let-off and take-up system driven by servo motor which is robust to disturbance and tension variation by using SVR(Support Vector Regression). Quality of textile goods in fiber manufacturing process highly depends on control of let-off, take-up and tension which are essential for constant tension control of yarn and textile fabrics and correct length of them. The physical properties of textile fabrics are very sensitive to several factors(temperature, humidity, radius change of warp beam etc.) which result in tension change. Rapid development of fiber manufacture machine for higher productivity requires control system for let-off, take-up and tension for robustness to sharp tension-variation and quick response. The validity and the usefulness of the proposed algorithm are thoroughly verified through numerical simulation.

• 정보학연구
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• 제3권1호
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• pp.125-142
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• 2000

본 연구에서는 우선 전자상거래의 현황과 미국, OECD, 유럽연합(EU)을 중심으로 한 국제적 논의 동향을 고찰하고 전자상거래에 대한 과세부과의 측면을 내국세와 관세로 세분하여 최근 논의된 국제회의 내용과 국내의 현상을 토대로 분석하면서 전자상거래 부문에 과세를 부과하는데 따르는 본질적인 문제를 기초로 내국세와 관세 부과의 문제점들을 종합적으로 분석하면서 우리의 정책적 추진과제를 제시하였다.

• 공업화학
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• 제5권3호
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• pp.451-456
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• 1994

천연계 비이온 계면활성제 APG(Alkyl Polyglucoslde)는 옥수수 성분의 글루코스와 팜, 야자유에서 얻어지는 지방 알코올을 이용하여 합성된다. 친수성인 글루코스의 중합도(D.P.=1.2~1.8)와 소수성인 alkyl chain 길이 (C8-C14)에 따른 계면특성(표면 계면장력, cmc, 기포력, effectiveness 등)을 조사한 바 중합도에는 영향이 적으나, alkyl chain 길이에는 큰 영향을 받았다. 지방산 오염에 대한 APG alkyl chain 길이별 세정력 평가를 한 결과 계면 장력이 낮을수록, 단위 면적당 흡착량이 많을수록 우수한 세정력을 나타내었으며, 그 순서는 APG 0814> APG 1214> APG 10> APG 0810> APG 08과 같다.

• 공업화학
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• 제5권3호
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• pp.457-465
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• 1994

계면활성제 수용액과 액체오염간의 계면장력을 계산치와 실측치로 구분할 수 있다. 계산치로 구한 부착일(Wac)와 세정력과의 상관계수(r)는 계면활성제 수용액의 농도가 낮은 0.04%에서는 0.93으로 밀접한 연관성을 나타내었으나 높은 농도인 0.1%에서는 0.37로 상호관련이 없음을 나타내었다. 실측치로 구한 부착일(Wae)과 세정력과의 상관계수는 저농도(0.04%)에서 0.95이고, 고농도(0.1%)에서도 0.84로 세정력과 부착일과의 깊은 연관성이 있음을 나타내었다. 따라서 저농도에서는 어느 경우나 부착일과 세정력과의 상관관계가 크나, 고농도에서 계산치로 구한 부착일과 세정력과의 상관관계는 거의 없고 실측값은 밀접한 관계가 있음을 알 수 있었다.