• Journal of Information Processing Systems
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• v.9 no.4
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• pp.538-547
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• 2013

In this paper, we propose a bias detection method that is based on personal and social opinions that express contrasting views on competing topics on Twitter. We used unsupervised polarity classification is conducted for learning social opinions on targets. The $tf{\cdot}idf$ algorithm is applied to extract targets to reflect sentiments and features of tweets. Our method addresses there being a lack of a sentiment lexicon when learning social opinions. To evaluate the effectiveness of our method, experiments were conducted on four issues using Twitter test collection. The proposed method achieved significant improvements over the baselines.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.617-618
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• 2014

본 논문에서는 보다 정확하고 효과적인 평판분석을 위하여 서비스 산업별 타겟으로 하는 수집사이트를 프로파일링 하는 방법을 제안한다. 먼저 각 서비스에 특화된 타겟 사이트를 추출하고 등록하고 각 서비스에 관련한 정보 및 의견 공유 게시판과 지식인 추천/질문 등 지식 공유 사이트를 추출한다. 또한 업종별 주요 사이트를 선택하고 등록하여 유효 데이터 수집한다. 이를 통해 실시간 수집 데이터의 활용 기술을 이용하여 수집원 프로파일링을 통한 미디어별 수집 주기 산정하고 수집 엔진의 유연한 확장성을 활용한 실시간 수집 제반 기술 확대할 수 있다. 또한 지속적인 수집원 변경관리를 수행한다. 즉, 신규 생성, 변경, 삭제되는 사이트에 대한 변경관리를 수행하고 지속적인 수집량 모니터링을 통한 수집여부를 점검하며 수집 필터링 규칙에 대한 튜닝으로 데이터 품질 확보하도록 한다.

• Smart Structures and Systems
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• v.30 no.3
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• pp.317-325
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• 2022

Among the approaches to the production of "green" energy, geothermal power systems are becoming quite popular in Europe. Their installation in existing buildings requires an extended, external pipes appendix and its laying operation needs a drilling activities nearby structural skeletons often designed to support static loads only, especially when ancient buildings are targeted. This contribution reports and discusses the experimental results achieved within a specific case study within the European project GEOFIT. In particular, standard accelerometric measurements in and nearby a single-story reinforced concrete building are collected and analysed in the absence of drilling (pre-drilling) and during drilling activities (drilling phase) to monitor the structure response to the external source of vibrations related to the excavations phase. The target is to outline automatic guidelines toward installations preventing from any sort of structural damage.

• ETRI Journal
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• v.45 no.6
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• pp.939-951
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• 2023

It is critical to estimate the location using only Long-Term Evolution (LTE) and Wi-Fi information gathered by the user's smartphone and deployable for emergency rescue, regardless of whether the Global Positioning System is received. In this research, we used a vehicle to gather LTE and Wi-Fi wireless signals over a large area for an extended period of time. After that, we used the learning technique to create a positioning database that included both collection and noncollection points. We presented a two-step positioning algorithm that utilizes coarse localization to discover a rough location in a wide area rapidly and fine localization to estimate a particular location based on the coarse position. We confirmed our technology utilizing different sorts of devices in four regional types that are generally encountered: dense urban, urban, suburban, and rural. Results presented that our algorithm can satisfactorily achieve the target accuracy necessary in emergency rescue circumstances.

• Journal of Advanced Marine Engineering and Technology
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• v.41 no.4
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• pp.323-329
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• 2017

Nowadays, considering global warming and enhanced prohibition to discharge pollutants at sea, all of existing operation-ships must lead to the reduction of fuel consumption. International standards of International Maritime Organization and EU rules governing harbor pollutants are being strengthened. Therefore, ship-owners and operators are seeking ways to reduce $CO_2$, SOx, and NOx emissions. Although world trade continues to expand, total fuel usage for sea transport tends to diminish. However, ICS(International Chamber of Shipping) has set a goal of reducing $CO_2$ emissions from shipping by 50% until 2050. In addition, with respect to the Paris Climate Change Accord in 2015, IMO proposes to set up a reduction target of GHG emission from existing operation-ships. For setting up a reduction target of GHG from international maritime transport, "A data collection system for fuel consumption" will be introduced in the near future. In order to effectively reduce the use of fuel in a ship in accordance with the trend of compulsory fuel saving from operation ships, this paper suggested adoption of an Incentive-Penalty scheme based on Emission-Trading-Scheme, Carbon Tax, and basic calculation formula after verifying the EEOI level for a year.

• The Journal of the Korea Contents Association
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• v.13 no.6
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• pp.30-39
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• 2013

Web crawler should maintain fresh data with minimum server overhead for large amount of data in the web sites. The overhead in the server increases rapidly as the amount of data is exploding as in the big data era. The amount of web information is increasing rapidly with advanced wireless networks and emergence of diverse smart devices. Furthermore, the information is continuously being produced and updated in anywhere and anytime by means of easy web platforms, and smart devices. Now, it is becoming a hot issue how frequently updated web data has to be refreshed in data collection and integration. In this paper, we propose dynamic web-data crawling methods, which include sensitive checking of web site changes, and dynamic retrieving of web pages from target web sites based on historical update patterns. Furthermore, we implemented a Java-based web crawling application and compared efficiency between conventional static approaches and our dynamic one. Our experiment results showed 46.2% overhead benefits with more fresh data compared to the static crawling methods.

• Journal of the Korean Society for information Management
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• v.33 no.2
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• pp.135-156
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• 2016

Recently, as the importance of user-oriented archives management is becoming increasingly, government archives try to serve interactive services using social network service (SNS) beyond one-way approaches. This study aims to analyze usage of government archives service in social media and examine users' interestedness. We especially select "National Archives of Korea" and "Presidential Archives" as target government archives and collect tweets from 2010 to 15th April 2016. Our study adopts informetric approaches and social media analysis including buzz analysis, time series analysis. We differentiate between the tweet collection posted by government archives themselves and the other collection generated by general users. Furthermore we conduct correlation analysis of tweet and social issues and propose application plan for government archives services in social media environment.

• Research in Community and Public Health Nursing
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• v.27 no.4
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• pp.346-357
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• 2016

Purpose: This study attempted to investigate the prevalence and related factors of Clonorchiasis among five major riverside residents in South Korea. Methods: This study is descriptive research, nationwide survey, and the subjects are 23,492 residents selected by convenience sampling. Data collection was conducted between March 1 and June 30, 2011, and stool collection and questionnaire survey were conducted by affiliated public health centers in 38 cities and Gun's. Results: The prevalence rates of Clonorchiasis in the five major riversides were as follows: the Guem River 15.2%; the Nakdong River 11.9%; the Seomjin River 10.9%; the Han River 5.7%; and the Yeongsan River 3.9%. The prevalence rates were shown to be significantly high among people who had highly frequent experiences of eating and cooking freshwater raw fish, were diagnosed with liver and/or biliary tract diseases, and drank less than once a month. Conclusion: These results suggest that it is necessary to improve awareness of Clonorchiasis and provide intensive public health education for the riverside residents. And the target groups should be set up by reflecting the characteristics of at-risk groups, and it is necessary to prepare customized strategies for prevention and management of Clonorchiasis.

• Journal of Environmental Policy
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• v.14 no.1
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• pp.135-158
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• 2015

An efficient management system of mercury-containing waste was designed by reviewing the management and treatment of spent fluorescent lamp in Korea and foreign countries. According to Waste Management Act in Korea, mercury-containing wastes from households are classified as municipal solid wastes even though mercury-containing wastes pose hazardous risks. In general, hence, mercury-containing wastes from households are not being managed properly because those wastes from households were not classified as specific wastes (or hazardous wastes). Some mercury-containing wastes are managed as a mandatory target item in waste charge system and Extended Producer Responsibility (EPR) system under Act on Promotion for Saving and Recycling of Resources. An efficient management plan of mercury-containing wastes can be derived with an improved collection system, designating disposal sites and advanced treatment facilities for spent fluorescent lamps. Finally, the role of each agent involved from collection to disposal of mercury-containing wastes was suggested to establish the efficient management system for mercury-containing waste.

• Journal of The Korean Society of Integrative Medicine
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• v.1 no.2
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• pp.13-22
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• 2013

Purpose : The purpose of the research is that get a cut above clinical practice effect through satisfaction of clinical training, practical training, content, oversight of training and evaluation system. Clinical training consists of part of university in Gwang Ju and Jeon nam. Method : The target of training student was studying at physiotherapy a tree or four-year-course collage in Gwang ju and Jean nam. Data collection period is from 21 November 2012 to 1 February. We explained how to do a means of collecting data and get students consent fill in questionnaire. Data collection prossed by using spss 10.1 program also independent proofs, descriptive statistics, crosstabulation, regression analysis and frequency analysis. Results : The subjects average age is 24 in general characteristic. A school system of subjects was a tree-year-course students. They were 58people(39.1%). A school system of subjects was a four-year-course students. They were 90people(60.9%).The male was 72(48.6%) and the female was 76(51.4%). We researched to know about satisfaction of clinical training, practical training, content, environment of practical establishment, trainee manage and evaluation method. All-round satisfaction of clinical training average was 1.90 Satisfaction of clinical training period and content average was 1.83Satisfaction of environment of practical establishment average was 1.88 Satisfaction of clinical training establishments' trainee manage and evaluation average was 1.94 Conclusion : It is important that student can get specific their future and can do at clinical throught clinical training after their graduation improving satisfaction of clinical training would give to impact a physical therapist reserve.