• 자원리싸이클링
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• 제25권4호
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• pp.80-86
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• 2016

우리나라 골재산업의 현황을 파악하기 위하여 골재채취법 및 산지관리법, 골재공급실적과 2016년도 골재원별 공급계획을 그리고 지역별 골재가격 동향을 조사하였다. 골재산업 중에서도 산림골재의 비중이 매년 신장하고 있으며, 산림골재가 골재산업을 주도하고 있다. 한편, 골재산업의 이해를 돕기 위해 우리나라 산림골재산업의 대표적 기업으로 매년 200 ~ 300만$m^3$의 품질 높은 골재를 수도권에 공급하고 있는 (주)삼표산업 화성사업소(화성석산)의 골재생산 프로세스를 기술하였다.

• Journal of Computing Science and Engineering
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• 제8권4호
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• pp.181-186
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• 2014

Web data mining aims at discovering useful knowledge from various Web resources. There is a growing trend among companies, organizations, and individuals alike of gathering information through Web data mining to utilize that information in their best interest. In science, cloud computing is a synonym for distributed computing over a network; cloud computing relies on the sharing of resources to achieve coherence and economies of scale, similar to a utility over a network, and means the ability to run a program or application on many connected computers at the same time. In this paper, we propose a new system framework based on the Hadoop platform to realize the collection of useful information of Web resources. The system framework is based on the Map/Reduce programming model of cloud computing. We propose a new data mining algorithm to be used in this system framework. Finally, we prove the feasibility of this approach by simulation experiment.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2009년 춘계학술대회논문집
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• pp.227-231
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• 2009

Traditional vacuum cleaner adoptsa highly rotating centrifugal impeller for generating suction region at lower pressure. The rotational speed is very high at 35,000 to 40,000 rpm and accessory structure such as a circular brush at the base plate of the cleaning devices is equipped for gathering dusts. Highly rotating impeller is effective for low pressure generation but causes noise problems. Recently, the unwanted noise is removed by installation of air-pump, instead of a centrifugal impeller, and the internal flows of the modified system are estimated in numerical and experimental approach, respectively.

• 대한산업공학회지
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• 제35권1호
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• pp.51-57
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• 2009

There are a variety of users and devices in a context-aware computing environment. In this environment, the service provided to a user may be the composition of diverse services rather than one independent service. Before user's devices provide the composite service to the user, they should perceive user's needs by gathering related information segments from other surrounding devices and/or sensors. We consider a context-aware computing environment providing composite and adapted service to users and propose an information processing model that characterizes the device where the collected data should be processed through services and/or applications. Based on this model, we provide an analytical tool to obtain some performance measures of the context-aware computing environment.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2006년도 춘계학술발표대회
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• pp.1073-1076
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• 2006

유비쿼터스 센서 네트워크의 성능을 판단하는 중요한 지표로 감지된 정보를 실시간으로 전송하는 능력과 네트워크의 최대 생존시간을 들 수 있다. 하지만 대부분의 무선센서 에너지원은 배터리로 구성되어 있음으로 인해 실시간 정보전송을 위해 통신모듈의 전원을 자주 사용하게 되면 조기에 네트워크의 생존력을 잃게 되는 문제가 발생할 수 있으며 그와 반대로 에너지소모를 낮추기 위해 전송 주기를 길게 하면 전송지연이 발생되어 위급한 상황에서 시스템이 즉시 대응하지 못하는 문제가 발생할 수 있다. 본 논문에서는 통신모듈을 DUAL BAND로 이중화하고 송수신모드를 세분화하여 각 모듈에 공급되는 에너지를 상황에 맞게 제어하는 방법을 제안하며 제안한 방법을 적용하여 에너지 소모량과 전송지연시간을 계산한 결과, 중요한 군사적 목적이나 위험방지를 위한 실시간 감시 목적으로 사용할 경우 실시간전송과 효율적 에너지사용을 동시에 만족시킴을 확인할 수 있었다.

• 한국제4기학회지
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• 제18권2호통권23호
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• pp.75-86
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• 2004

The sea level curve and environmental change were reconstructed at Sejuk-ri during the early Neolitic Age, based on the sedimentary facies, the distribution of remains and carbon datings. Before 6,500 years BP, the sea-level experienced one oscillation. The Neolitic men utilized geomorphic environment which formed according to the sea-level change. They might be occupied in gathering, fishing and hunting including whales hunting. The Neolitic men made acom hollows in order to remove tannin. Besides, they remained shell mounds which were formed from 6,500 years BP to around 6,000 years BP. They left the living place about 6,000 years BP because of transgression.

• 대한가정학회지
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• 제41권10호
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• pp.15-30
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• 2003

This case study analyses the process to redress consumer damages caused by advertising solution error of Samsung mall from July 30th, 2002. We could discover the typical characteristics of small damages for many people and propose efficient consumer redress system. It was very difficult for consumers to recognize and verify their damages. Damages were very diverse and had traits of electronic transactions. We also examined the evaluations of individual consumer and consumer organization, YMCA on the process and result of consumer redress. Class action should be introduced as soon as possible to overcome financial problem and gathering plaintiffs for lawsuit. Consumer organizations need more professional negotiation ability.

• Journal of Information Technology Applications and Management
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• 제11권4호
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• pp.49-60
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• 2004

While the World-Wide Web offers an incredibly rich base of information, organized as a hypertext it does not provide a uniform and efficient way to retrieve specific information. Therefore, it is needed to develop an efficient web crawler for gathering useful information in acceptable amount of time. In this paper, we studied the order in which the web crawler visit URLs to rapidly obtain more important web pages. We also developed an internet agent for efficient web crawling using hyperlink structure and fitness of hypertext documents. As a result of experiment on a website. it is shown that proposed agent outperforms other web crawlers using BackLink and PageRank algorithm.

• 대한가정학회지
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• 제33권6호
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• pp.137-148
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• 1995

The purpose of this study was to classify the cognitive management style of housewives, to explore the effect of demographic variables on the style, and to investigate satisfaction of resources such as money, time and energy, according to different styles. For this purpose, the samples of 355 housewives were collected in Seoul. And various analysis methods, such as frequencies, percentages, means, chi-square test and GLM, were employed. The results of this study were as follows ; 1) Among 355 respondents, systematic managers, analyzing managers, holistic managers and feeling managers were 103, 96, 82 and 74 respectively. 2) Depending on information gathering and evaluation, the style was influenced by wives' education, wives' employment status, and family life cycle. 3) By style, satisfaction of resource was differenciated significantly. Between money, time and energy resources, especially, satisfaction of energy resource had significant differences.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2008년도 학술대회 1부
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• pp.195-199
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• 2008

We present an approach to detect real plane for line base recognition and pose estimation Given 3D line segments, we set up reference plane for each line pair and measure the normal distance from the end point to the reference plane. And then, normal distances are measured between remains of line endpoints and reference plane to decide whether these lines are coplanar with respect to the reference plane. After we conduct this coplanarity test, we initiate visibility test using z-buffer value to prune out ambiguous planes from reference planes. We applied this algorithm to real images, and the results are found useful for evidence fusion and probabilistic verification to assist the line based recognition as well as 3D pose estimation.