• Journal of Adhesion and Interface
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• v.12 no.4
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• pp.117-124
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• 2011

This study was made on the poly(vinyl acetate) (PVAc) and poly(vinyl acetate- ethylene) (VAE) emulsion polymer blend which used PVA as protective colloid, and the PVA used as protective colloid was existed in each emulsion film before blend and even in the film after the blend consecutively. It makes us expect excellent adhesive power among particles that form the blend. Emulsion blends with different Tg are important target of concerning, and PVAc/VAE emulsion blend suggested simple and excellent research method. As a result of blend, elongation was lowered by the increase of PVAc, and the plasticizer used in making PVAc affected on the Tg of blend and lowered Tg of VAE emulsion, and the synergy effect of two blends was seen for the tensile strength, thermal resistance, and adhesive strength.

• Journal of Korea Game Society
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• v.7 no.4
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• pp.3-11
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• 2007

In many game narrations, completed games have been used to analyze the users' response. But in this case, one tends to exclude the narrations that producers intended at the production stage, and games tend to have a narrative structure in a text form before they turn into the digital form of a completed game. For these reasons, we broadened the existing definition of game narration to include from production to completion. We then divided the production into many stages and analyzed how narrative structure changes at each stage. We divided narration into three stages? initial stage, storytelling stage, and form change stage. Game narrations maintain the form similar to the one in exiting narrations at the initial and storytelling stages, but turn into functional document at the form change stage. And at this stage, digital results take the place of narrative expressions.

• Journal of the Korean Institute of Intelligent Systems
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• v.20 no.2
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• pp.173-180
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• 2010

The research of the preserving privacy of sensitive information has been popular recently. Many researches about the techniques of generalizing records under k-anonymity rules have been done. Considering that data anonymity requires a lot of time and resources, it would be important to decide whether a table is vulnerable to privacy attacks before being opened in terms of the improvement of data utilization as well as the privacy protection. It is also important to check to which attack the table is vulnerable and which of anonymity methods should be applied in the table. This paper describe two possible privacy attacks based upon related references. Also, we suggest the technique to check whether data table is vulnerable to any attack of them and describe what kind of anonymity methods should be done in the table. The technique we suggest in this paper can also be applied for checking the safety of anonymity tables in which insert or delete operations occurred as well from privacy attacks.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.5
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• pp.947-952
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• 2012

The technology suggested in this study is the method to contain executable software in a portable storage devices like the USB and install an application program to operate it in any client devices. To solve this problem, we can store pre-scanned information on the above client's files, registry, and services in the device before installing the proper application program to be installed using the scanning method and manage in the USB the resources that generated and changed by post-scanning the information after installing the above application program in the client's device. After that, necessary files in the client to be used can be copied for using, and after use, related files are deleted, and it also includes the process to return to the previous system environment. This method is advantageous in that once any sort of application programs needed to be installed gets to be installed in an external portable storage devices like the USB, the application program installed can be operated in any computer not raising any issues like illegal copy.

• Economic and Environmental Geology
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• v.43 no.6
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• pp.543-553
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• 2010

This study was focused on the mineralogical and geochemical characteristics of field soil of the Baekje Kingdom from K wongbawigol site in Jeongdongri, Buyeo and whether the bricks from Songsanri Tombs and Muryung's Royal Tomb were made of soil from this site. Soil samples show the similar size fraction as a silt loam and acidic soil, whereas some samples have the enrichment of organic matter, P and S. Also, they have similar geochemical behavior of elements and similar mineral phases consisting of quartz, plagioclase, orthoclase, vermiculite, mica and kaolinite. The enrichment of iron oxide is found in some soil layer, including the iron oxide mottling and precipitation along plant roots and they are attributed to repeat oxidation and reduction environments due to flooding and drainage of field soil. It's anthropogenic alteration by human activity. Especially, it is assumed that the concentration of the iron oxides found in bricks from Muryung's Royal Tomb and Songsanri Tombs is the additional evidence that soil in this study is probably the raw materials of those bricks.

• Journal of the Korean Wood Science and Technology
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• v.35 no.1
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• pp.64-72
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• 2007

The biodeterioration behaviors of square post to support the wooden printing blocks Shelves in the Janggeongpanjeon were investigated according to the positions and parts of square post, and environmental conditions. It was found that a high differences of deterioration in the progressing levels of wood decay, according to the positions and parts of square post, and environmental conditions. The decay levels were very high and still progressing in the contacted areas with stone foundation which are about up to 50 cm above it. In the decay type, white rot fungi was mainly affected in the inside of building which mainly made of softwood. The decay in the square posts to support the wooden printing block shelves inside of building was worse in the rear side, compared to front side. The insects was not found in most of square posts excluding the post which was neighboring at the infected round column by insect.

• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.59-59
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• 2018

최근 수질오염원 중에서 비점오염원의 영향 높아지고 있다. 특히, 농경활동에서 유래되는 비점오염원이 공공수역의 수질에 미치는 영향이 증가하고 있다. 농경지에서 배출되는 비점오염원은 관리대상 면적이 넓어 비점오염 배출을 저감하기 위해서는 사전예방적 차원에서 접근이 필요하다. 하지만, 비점오염원에 대한 농업인과 주민들의 인식 부족으로 인하여 관리에 많은 어려움이 있다. 근래에 농업 비점오염원 저감을 위한 노력으로 물리적 기술적 접근만이 아니라 사회 문화적 접근이 병행되어야 한다는 점이 강조되고 있다. 따라서 본 연구에서는 농업 비점오염원 관리를 위한 사회문화적인 접근 방법으로서 전형적인 한국의 농촌 마을에서 농업 비점오염원에 대한 인지도 향상과 자발적 저감활동 실천 참여를 유도하기 위하여 개발된 역량강화 교육프로그램이 교육 대상자인 농업인, 주민, 마을지도자의 인식변화에 미치는 효과를 살펴보았다. 역량강화 프로그램은 농업인과 지역주민, 마을리더의 인문사회적 특성을 고려하여 공통과정과 맞춤형 과정으로 구성하였다. 농업인은 농업비점오염 저감에 적용할 수 있는 시비관리와 배수 물고관리, 영농폐기물 관리, 친환경농업에 대한 내용으로 구성하였다. 마을주민은 고령화된 여성의 비율이 높은 것을 고려하여 분리수거, 쓰레기 문단투기 및 소각, 마을 미래상과 환경실천에 대해서 교육하였다. 마을리더에게는 공동체 활성화 리더쉽, 주체적 주민참여, 갈등관리에 대한 내용으로 구성하였다. 공통적으로는 비점오염원과 농업 비점오염원의 정의와 유형, 마을환경관리 실천활동, 친환경농업 선진지 견학으로 구성하였다. 교육프로그램은 2년 동안 진행되었으며 마을별로 방문하여 진행하였다. 농촌 마을에서 농업비점오염원 역량강화 교육 프로그램의 효과는 다음과 같다. 교육 전의 소극적 참여의사에서 적극적인 활동 참여로 발전하였으며, 비점오염원에 대한 인식 및 관리 필요성에 대한 인식이 개선되었다. 농업 비점오염원 보다는 일반적인 비점오염에 대한 인지효과가 높게 나타났다. 따라서 농촌지역에서 농업비점에 대한 인식 변화가 저감활동 실천으로까지 이루어지는 가시적 효과를 거두기 위해서는 장기간이 소요됨을 시사하였다.

• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.25-25
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• 2018

본 연구는 충주댐을 대상으로 기후변화에 따른 미래 댐운영에 미치는 영향을 평가하기 위하여 연구 목적에 접합한 GCM 및 상세화 기법 선정을 위한 절차를 적용함으로써 사용자 중심의 기후변화 시나리오 상세화 자료가 유입량의 재현성 평가에 미치는 영향을 분석하였다. 우선 편이보정 전의 29개 원시 GCM에 대한 강수량 및 기온의 순단위 시 공간적 재현성 평가를 통해서 상위 16개 GCM을 선정하였다. 이후 상세화 기법을 선정하기 위해서 유입량 전망에 중요하다고 판단되는 총강수량(prcptot) 및 일최대강수량 (rx1day)을 기후지수(Climate Indices)로 선정하였다. 상세화 기법은 과거기간의 재현성이 평가, 미래기간 시그널 왜곡도 평가, 공간상관성에 대한 재현성 평가를 통해 SQM 기법을 선정하였다. 제한적인 기후변화 전망 자료를 고려하여 과거 30년 기간에 대한 모의결과 월단위 모형효율지수(ME) 및 결정계수 ($R^2$)는 모두 0.92로 만족할 만한 결과를 보여 주었다. GCM 선정에 따른 오차는 원시 GCM을 통해 선정된 16개 GCM을 사용한 경우 유입량 재현성 평가에 있어 가장 좋은 결과를 보였다. 전체적으로 상세화 자료를 유역 모델링에 활용하는 경우 GCM의 선정보다는 상세화 기법의 선정이 전체적인 재현성 평가에 있어서 중요한 것으로 나타났다. 미래기간에 대한 평균 유입량 전망은 모든 RCP 시나리오에서 근 미래 보다는 중간 및 먼 미래 기간 동안에 유입량이 증가하는 경향을 보였다. 또한 모든 미래 기간에 대해여 RCP 8.5 시나리오가 RCP 4.5 시나리오와 비교하여 유입량의 증가가 높을 것으로 전망되었다. 홍수 관리측면에서 중요한 일 최대 유입량의 미래 변동은 평균 유입량과 비교하여 최대 두 배 이상의 높은 변화율을 보였다. 댐운영 측면에서는 연간 총 유입량의 변화보다 시기별 유입량의 변동 특성을 이해하는 것이 중요하며, 평균 유입량 및 일단위 최대 유입량 모두 근 미래 기간에 대해서는 RCP 시나리오 모두 7월 및 8월을 중심으로 유입량이 증가하는 경향을 보였다. 반면 중간 미래에서 먼 미래로 갈수록 평균 및 일단위 최대 유입량 모두 전체 기간에 걸쳐 증가하는 경향을 보였다.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.9 no.1
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• pp.395-404
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• 2019

South Korea's economic growth was rapid, It was occasioned the concentration of resources in the metropolitan area. On the other hand, the province has a narrow economic base compared to the metropolitan area, and the underpopulation have been identified. Thus, The government announced the 'National balanced development law' in 2004 to reduce the problem of regional imbalances. The study collected data on 95 of relocated public institutions, and unlike previous studies, Mamquist analysis was used to compare the productivity before and after each public institutions' s relocation. The study focused on how the relocation of public institutions affected the productivity of public institutions through Malmquist Analysis. The results of the analysis show that productivity is declining after most public institutions have moved. And two independent samples T-test result, respective yearly average is nonsignificant.

• Applied Chemistry for Engineering
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• v.22 no.3
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• pp.291-295
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• 2011

A bake-out process using auto switchgear for five days was performed to evaluate the reduction effect of the concentration of volatile organic compounds (VOCs) and formaldehyde in a newly-built elementary school gymnasium. Reduction rates of VOCs were observed as followings: 38.2, 64.2, 86.3, 80.2, and 71.5% for benzene, toluene, ethylbenzene, xylene, and styrene, respectively, which satisfies the indoor air quality standards of newly-built apartment houses in Korea. The reduction rate of total VOCs and formaldehyde were 67.0 and 24.7%, respectively. Those results proved that the bake-out process using auto switchgear was effective for reducing indoor air pollutants.