• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.22 no.5
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• pp.171-176
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• 2022

With the recent development of deep learning technology, the areas of recommendation systems have also diversified. This paper studied algorithms to improve the learning rate and studied the significance results according to words through comparison with the performance characteristics of the Word2Vec model. The problem recommendation algorithm was implemented with the values expressed through the reflection of meaning and similarity test between texts, which are characteristics of the Word2Vec model. Through Word2Vec's learning results, problem recommendations were conducted using text similarity values, and problems with high similarity can be recommended. In the experimental process, it was seen that the accuracy decreased with the quantitative amount of data, and it was confirmed that the larger the amount of data in the data set, the higher the accuracy.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.23 no.4
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• pp.79-84
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• 2023

Apache Spark, which provides the fastest processing speed among recent distributed and parallel processing technologies, provides real-time functions and machine learning functions. Although official documentation guides for these functions are provided, a method for fusion of functions to predict a specific value in real time is not provided. Therefore, in this paper, we conducted a study to predict the value of data in real time by fusion of these functions. The overall configuration is collected by downloading stock price data provided by the Python programming language. And it creates a model of regression analysis through the machine learning function, and predicts the adjusted closing price among the stock price data in real time by fusing the real-time streaming function with the machine learning function.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.23 no.5
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• pp.77-82
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• 2023

Intelligence Home and Home Automation, which attracted attention before Smart Home, caused inconvenience to users by focusing on applying cutting-edge technologies to homes, and failed to popularize them due to lack of unemployment efficiency. However, with the 4th Industrial Revolution, various services using technologies related to big data, artificial intelligence, and the Internet of Things are increasing, and the rate of smart home services that operate, manage, and automate products at home is gradually increasing. In line with this trend, this paper implements a program app that can connect, manipulate, and manage products using MQTT server, Django web framework, and WIFI communication module.

• Journal of dental hygiene science
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• v.5 no.2
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• pp.71-76
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• 2005

This study tried to understand influence of water fluoridation program on oral health status and get the basic data of water fluoridation program in the future. Sangdang-gu in Cheongju City, fluoridated community and Manan-gu in Anyang City, non-fluoridated community were the surveyed area of the study. And from July 3, 2003 to July 22, 2003, using questionnaire, we surveyed opinions of parents of the fifth and sixth grade students of C elementary school in Sangdang-gu, Cheongju City and A elementary school in Manan-gu, Anyang City about water fluoridation program, and made an oral examination on the fifth and sixth grade students. The results are as follows : 1. DMFT index was lower for Cheongju, fluoridated community with Cheongju 1.69, Anyang 2.11(P = .010). 2. DMFT rate was lower for Cheongju, fluoridated community with Cheongju 6.72%, Anyang 7.94%. 3. Health level of the first molar was higher for Cheongju, fluoridated community with Cheongju 95.54%, Anyang 94.10%(P = .002). This study intends to understand the effects of fluoridation program on oral status by analyzing the effects of water fluoridation program and present basic materials for improving oral health. Improving national oral health is thought to be associated with expense retrenchment of oral health insurance financial. So it may need to extend using tap water to all the area of the country and additionally establish confidence through an active public relations and education of water fluoridation program.

• Proceedings of the Korea Water Resources Association Conference
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• 2006.05a
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• pp.254-258
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• 2006

경제발전 과정에서 급격한 도시화로 인해 건기의 하천 수량은 줄어들고, 비점오염 발생량은 증가하였으며 심지어 하천이 복개되고 직강화되어 홍수 피해 및 수질오염은 더욱 증가하고 있다. 다행히 최근 소득수준의 증가와 여가시간이 확대됨에 따라, 그 동안의 도시화와 산업화로 인한 오염된 하천을 다시 복원하려는 운동이 활발하게 진행되고 있다. 안양천은 이 같은 하천 중 가장 대표적인 하천 중 하나이다. 본 연구에서는 다속성선택법(CE: choice experiments)을 적용하여 안양천이 어떠한 속성을 갖고 있으며 각각의 속성에 대해 안양천 유역주민들의 사회적인 경험과 인식, 그리고 각 속성의 수준간의 상쇄관계(trade-off)를 고려함으로써 소비자선호에 근거한 한계가치(marginal value)를 추정하였다. 2차례에 걸친 예비조사를 통해 안양천이 가진속성을 홍수피해위험, 가뭄시 하천유량, 수질등급, 하천형태로 설정하였고 설문지 작성을 위해 개별 속성들간의 직교성(orthogonality)을 보장해 주는 주효과 직교설계(orthogonal main effects design) 방법을 이용하였다. 작성된 설문지를 이용해 안양천 유역 10개 지자체 거주민을 대상으로 설문조사를 실시하였고 설문조사 결과를 통해 추정된 각 속성에 대한 가구당 매월 한계지불의사액은 하류구간의 잠재적 홍수피해(PFD가 0.5)가 보통일 경우는 1,764.8원/월, 낮을(PFD가 0.5이하) 경우는 1,783.8원/월, 가뭄시 하천수가 목표유지유량보다 는 작지만 매말라 있지 않은 경우에는 1,496.8원/월, 가뭄시 하천수가 목표유지유량 이상 유지될 경우에는 2,274.9원/월, 수질 등급 3등급일 경우 1,721.5원/월, 수질 등급 2등급일 경우 1,764.4원/월, 하천둔치를 체육공원과 산책로를 조성할 경우 2,078.1원/월, 하천둔치를 자연친화형 하천으로 보존할 경우 2,441.7원/월으로 분석되었다. 또한 추정된 가구당 매월 한계지불의사액을 통해 각 지자체별 정책대안의 기대효과에 대한 편익을 추정하였다. 각 기대효과는 치수, 수량확보, 수질, 생태로서 각각의 기대효과에 대해 가장 높은 편익을 나타내는 것은 부천시의 하수처리장 건설로서 이는 매년 926.8억원의 편익이 발생되며 그 다음으로는 부천의 하수관거정비(역곡)로서 이는 매년 601.5억원의 편익이 발생하는 것으로 추정되었다.

• Spatial Information Research
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• v.4 no.1
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• pp.21-42
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• 1996

The Anyang-cheon is one of the Han River tributaries in Seoul Metropolitan area. It is 35.1km long, has a basin area of 287km2 and touches seven cities of Kyounggi Province and part of Seoul. The purpose of this study were 1) to reconstruct the ancient stream network and to investigate the change of landuse in Anyang-cheon watershed between 1957 and 1991,2) to measure the change of the hydrologic ¬acteristics with urbanization, 3) to suggest the institutional solutions to reduce natural hazard as the area has urbanizedThe main results are as follows: 1.Anyang-cheon river basin has experienced the rapid urbanization and industrialization since 1957. Anyang-cheon stream network was oversimplified in the watershed. The total stream length decreased atributaries in the upper part of river basin have eliminated or buried undergrolmd in pipes. 2.Urbanization impacted to all of the area of Anyang-cht'On watershed. Urbanization in Anyang-cheon watershed corresponds to the large portion of flat area, especially flood - prone zone of river side, and the small portion of Greenbelt to constrain urban expantion in cities. 3.The urbanization of Anyang-cheon watershed produces fundamental changes in watershed hydrology. As infiltration is reduced by the creation of extensive pavement, concrete surface, and sewer pipe, runoff moves more quickly from upland to stream. As a result, runoff from the watershed is flashier, increasing flood hazardAs urban area continue to grow we will need to better utilize stream by protecting and enhancing stream systems.otecting and enhancing stream systems.tems.

• Journal of Korean Society of Forest Science
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• v.39 no.1
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• pp.1-34
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• 1978

On July 8, 1977, 432mm of precipitation which is the largest daily storm in Korea fell on the city of Anyang where a nearby suburban community of Seoul. Average storm intensities of 90mm per hour were recorded during the period from 1900~2200 hours on this date. Area of landslides triggered by this storm is about 96 hectares resulting from 1,876 places within about 12,600 hectares of the watershed studied. These hazards injured hundreds of human lives and took 122 human lives. Rail and highway systems were disrupted and about 30 hectares of rice paddies were washed away and hundreds of hectares were inundated. About 500 houses were destroyed. The objectives of this study are (a) to describe the problem areas, identifying critical factors causing the landslide hazards including earth and stone-debris avalanches, (b) suggest measures which might enhance the effectiveness of stabilization measures, and (c) also suggest the landslide and flood damage prevention methods from the point view of the upper-watershed conservation techniques in Anyang hollow-basin.

• Korean Architects
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• s.473
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• pp.60-61
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• 2008

• Korean Architects
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• no.10 s.59
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• pp.26-37
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• 1973

• Korean Architects
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• no.12 s.225
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• pp.11-26
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• 1987