• 대한안전경영과학회지
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• 제8권2호
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• pp.25-38
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• 2006

It was investigated the current state of work-related musculoskeletal disorders (WMSDs), which is one of the major problems in occupational safety and health management. A survey was conducted for safety personnel serve in the enterprises located at two cities in Gyungbuk area, Gumi and Pohang where the major industrial complex reside. The goal of this study was to identify whether the category and scale of the enterprises affect the sort of hazard factors, occurrence rate, and countermeasures against WMSDs. The results from the survey indicated that there were significant differences in the level of recognition and counteracts for WMSDs among the enterprises subject to their categories and scales. On the basis of these results, it was considered a more efficient way of spreading proper ergonomic knowledge and skills to the industries that were coincided with the circumstances of individual enterprise.

• ETRI Journal
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• 제38권1호
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• pp.52-61
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• 2016

A microblog is a service typically offered by online social networks, such as Twitter and Facebook. From the perspective of information dissemination, we define the concept behind a spreading matrix. A new WeiboRank algorithm for identification of key nodes in microblog networks is proposed, taking into account parameters such as a user's direct appeal, a user's influence region, and a user's global influence power. To investigate how measures for ranking influential users in a network correlate, we compare the relative influence ranks of the top 20 microblog users of a university network. The proposed algorithm is compared with other algorithms - PageRank, Betweeness Centrality, Closeness Centrality, Out-degree - using a new tweets propagation model - the Ignorants-Spreaders-Rejecters model. Comparison results show that key nodes obtained from the WeiboRank algorithm have a wider transmission range and better influence.

• 한국주거학회논문집
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• 제14권4호
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• pp.97-108
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• 2003

In 1990’ idyllic housing complex is spreading surrounding metropolitan areas of Korea as a result of needs for quality change of housing environment, which was caused by the increase of income, the spread of cars and the change of working environment. On the contrary to the idea of idyllic housing, however, while it is just surrounded by natural environment, it has some critical problems such as the lack of public facilities and its development which often damages the nature. The row houses which this study deals with are popular with working class especially in Europe as an idyllic urban housing. It is noticeable that they have separate private gardens which satisfy the residents'basic needs and save lot areas and building costs more than detached houses. This study intends to suggest row houses as an appropriate housing type for environmentally friendly housing in Korea through the analysis of cases of row houses.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제55권12호
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• pp.581-585
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• 2006

Macro interfaces between two different bulk materials which affect the stability of insulation system exist inevitably in the complex insulation system using in extra high voltage (EHV) electric devices. In this paper, Interface between epoxy and ethylene propylene diene terpolymer (EPDM) was selected as an interface in electrical insulation system and the AC dielectric strength of the interface was investigated. Air compress system was used to give pressure to the interface. Specimens were prepared in various ways to generate different surface conditions for each type of interface. Increasing interfacial pressure, decreasing surface roughness and spreading oil over surfaces improve the AC interfacial dielectric strength. Especially, the dielectric strength was saturated at certain interfacial pressure.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2003년도 추계 학술발표회논문집
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• pp.20-27
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• 2003

The nonparametric method was employed to obtain detailed broadband attenuation characteristics of horizontal Fourier spectra without generally assigned constraint that derived path terms be zeros at a reference distance. Instead, path terms fer a reference distance were obtained based on the physical phenomenon that the seismic phase is stable over the hypocentral distance range from 200km to 400km so that the Q-values evaluated at several distances inside that region should be the same. The inverted path terms show three distinct linear regions roughly divided by hypocentral distances at 65km and 115km. Also complex behavior at the near distance range below 100km was revealed which can not be properly fitted by combination of single $Q_{0}$ $f^{η}$ model and any geometrical spreading models.s.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2022년도 춘계학술발표대회
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• pp.627-630
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• 2022

Over the past few years, fake news has become one of the most significant problems. Since it is impossible to prevent people from spreading misinformation, people should analyze the news themselves. However, this process takes some time and effort, so the routine part of this analysis should be automated. There are many different approaches to this problem, but they only analyze the text and messages, ignoring the images. The fake news problem should be solved using a complex analysis tool to reach better performance. In this paper, we propose the approach of training an Artificial Intelligence using an unsupervised learning algorithm, combined with online data parsing tools, providing independence from subjective data set. Therefore it will be more difficult to spread fake news since people could quickly check if the news or article is trustworthy.

• 한국항공우주학회지
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• 제39권6호
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• pp.576-584
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• 2011

성공적인 발사체 개발을 위해서는 개발비용을 정확하게 추정하는 것도 중요하지만 연차별 예산 배분을 적절히 계획하는 것도 중요하다. 본 논문에서는 통계적 기법을 이용하여 개발기간 중 연차별 예산 배분에 대하여 분석하였다. 연차별 비용 모델링을 위해서 통계적 모델의 분석을 통해 적합성을 판단하여 베타분포모델을 선택하였고, 프로젝트의 설계와 기술의 성숙도로 추정이 가능한 모델을 개발하였다. 연차별 비용 모델의 타당성을 검증하기 위하여 우주왕복선 주 엔진(Space Shuttle Main Engine)의 실제 개발비용 분포와 본 모델을 통한 개발비용 분포의 비교 연구를 통해 적합성을 확인하였다. 또한, 본 논문의 개발 비용 모델을 한국형발사체 개발에 적용하여 연차별 소요 비용을 추정하였다. 본 논문에서 제시하는 연차별 분포 모델은 발사체뿐만 아니라 다른 대형복합시스템의 개발에도 활용이 가능할 것으로 예상된다.

• The Plant Pathology Journal
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• 제24권2호
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• pp.118-124
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• 2008

Skin sooty dapple disease, a fungal disease that lowers Asian pear fruit quality, has emerged recently in Korea but has not yet been thoroughly characterized. This disease affects the surface of fruit, leaves, and young shoots of the Asian pear, typically appearing as a dark or pale black dapple on the fruit surface. The disease initiates on the fruit with small circular lesions that become bigger, eventually spreading to form large circular or indefinite lesions. Sparse dark or flourishing white-greyish aerial mycelia and appearance of a dark or pale black dapple on the fruit surface are typical signs of this disease. The disease was severe during cold storage of the Niitaka and Chuhwangbae varieties, but more limited on the Gamcheonbae and Hwangkeumbae varieties. To identify causal pathogens, 123 fungal isolates were obtained from lesions. The fungi that caused typical skin sooty dapple disease symptoms in our bioassay were identified. Based on their morphological characteristics, 74% of the isolates were Cladosporium sp. and 5-7 % of the isolates were Leptosphaerulina sp., Tripospermum sp., or Tilletiopsis sp. None of the isolates caused severe soft rot by injection to a wound plug, but some of the Cladosporium sp. isolates caused mild maceration. Therefore this microbiol complex cannot account for the soft rot also observed in stored fruits. The high frequency of isolation of Cladosporium sp. from disease tissues and bioassay on pear fruit surface suggest that Cladosporium sp. could be a major pathogen in the microbial complex associated with skin sooty dapple disease of the Asian pear in Korea.

• Smart Structures and Systems
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• 제30권3호
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• pp.333-338
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• 2022

Planning activity is complex process assuming the term "complexity" as a group of elements interconnected each other. The common knowledge about city planning underlines its main aim as: figuring the present, imaging the future, governing every day the territory and the way people use and live it at different scales. When considering the strength of technological opportunities and the spreading of ICT and IoT devices within everyday life, that mean within the life of cities, the complex nature of the urban system increases with the intensification of information and their connections. Recent orientations about urban and regional planning try to carry the discipline to a more flexible approach in respect to the hyperdeterminant role of direct technical applications. This passage is a fundamental aspect considering the faster and faster modifications of social and economic assets at the global and local scale. At the same time, the "environment question" became more and more relevant at the worldwide scale within the 2015 UN 2030 Agenda for Sustainable Development. Another relevant aspect about the recent urban planning orientations regards the role of the different subjects that are part of the planning process. Approaching the government of smart cities means to define how every subject, with different roles (public or private), could enrich the knowledge of the functioning of the "urban machine" and the awareness of participation of people and city users in the quality of urban life. In the paper author starts defining recent approaches in urban planning, then the nature of the city as a complex system is analyzed from the point of view of planners and of the different subjects that act in the city. Then the smart city is introduced as a further level of complexity and finally author propose the basic element of a Planning Support System.

• 한국토양비료학회지
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• 제26권2호
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• pp.72-77
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• 1993

피복요소복합비료(被覆尿素複合肥料) 시용과 벼 생육(生育) 및 미질(米質)과의 관련성을 밝히기 위하여 벼 측조시비용인 피복요소복합비료(18-12-13)를 공시하여, 피복요소복합비료 전량처리구(CUC I)와 피복요소복합비료 50%와 속효성비료 50% 혼합처리구 (CUC II)로 식양토(埴壤土)(덕평통(德坪統))와 사양토(砂壤土)(강서통(江西統))에서 검토한 결과는 다음과 같다. 1. 벼 잎색도(色度)는 전층(全層)시비와 측조(側條)시비 모두 토성(土性)에 관계 없이 벼 생육후기(生育後期)에는 피복요소복합비료시용구에서 높았다. 2. 질소흡수량(窒素吸收量)은 관행에 비하여 피복요소복합비료 시용구에서 많았고, 피복요소복합비료 II시용구보다 피복요소복합비료 I시용구에서 많았다. 3. 수확지수(收穫指數)는 피복요소복합비료 시용구에서 낮았고, 속효성 비료 혼합시용에 의해 그 정도를 줄일 수 있었다. 4. 피복요소복합비료시용은 완전미율(完全米率)이 감소(減少)되었고, 불완전미중(不完全米中)의 동할미율(胴割米率)이 현저히 증가되었으며, 미립중(米粒中)의 Hon치(値)(Mg/K.N)는 감소된 반면, 단백질(蛋白質), amylose 함량은 증가 되었다. 5. 취반특성(炊飯特性)인 호응집성(糊凝集性)(gel consistency)과 알칼리 붕괴도(崩壞度)(asv)는 피복요소복합비료시용에 의해 각각 길어지고, 낮아졌다. 6. 이상의 결과에서 미질(米質)은 피복요소복합비료 시용에 의해 나빠지는 경향이었고, 속효성비료(速效性肥料) 혼합(混合)시용에 의해 어느 정도 방지(防止)할 수 있었다.