• 방사성폐기물학회지
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• 제15권1호
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• pp.45-63
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• 2017

한국의 가장 오래된 상업 원전인 고리 1호기가 2017년에 해체가 이루어질 예정이다. 원전 해체 폐기물의 적절한 처리는 효율적인 원전해체에 있어 중요한 역할을 할 것이다. 특히, 저준위 또는 오염되지 않은 금속폐기물의 재활용은 폐기물 발생 저감은 물론 처분장의 공간을 절약하는데 기여할 것이다. 본 논문은 재활용 시스템의 개념설계와 정의된 업무 흐름에서 발생하는 피폭 선량을 평가하는데 그 목적이 있다. 작업의 흐름과 운전 개념을 정립하기 위해 다양한 형태의 다이어그램을 설계하였다. 선량평가에 필요한 시나리오는 개념설계를 기반으로 선정되었으며, RESRAD-RECYCLE을 이용하여 선량을 평가하였다. 이를 통하여, 결정적 시나리오 선별, 핵종 특성 및 핵종 분배가 선량에 미치는 영향을 분석하였다. 더 나아가, 선량분석은 피폭 시나리오에 대한 대체 방안 수립, 필요한 제염 및 방사선방어 프로세스 그리고 허용 방사능 검토의 정보를 제공하는데 사용 될 수 있을 것이다.

• 한국실내디자인학회논문집
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• 제14권5호
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• pp.254-261
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• 2005

This paper presents an attempt to develop a visual programming language-based 3D virtual reality authoring tool intended to compose virtual interior space. The rapid development of digital technology and the wide spread of the Intenet have expanded the different uses of virtual reality in a number of applications ranging from interior design to building maintenance. In particular, the construction of cyber spaces based on existing interior spaces is becoming increasingly important. Current research, however, remains at the level of converting 3D models into virtual reality models, despite practitioners' needs for structural space models. Moreover, commercial tools to build virtual reality space have the disadvantage of targeting people who have professional knowledge of computer programs and computer graphics. Accordingly, the 3D virtual reality authoring tool developed in this research - called the VESL system - enables virtual and structural space to be easily composed using intuitive and interactive visual interfaces, which are based on visual programming techniques. The VESL system also provides an XML based semantic description of interior space, to be used to describe interior space information. We anticipate that the virtual reality spaces composed by this system will be of considerable use in the fields of architecture and interior design. Further research issues identified at the end of the research include developing a converter/filter for transforming Internet virtual reality standard language, or VRML, and evaluating the application of the system for practical use.

• Asian Journal of Atmospheric Environment
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• 제11권4호
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• pp.330-343
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• 2017

Climate change is an important issue, with many researches examining not only future climatic conditions, but also the interaction of climate and air quality. In this study, a new version of the emissions processing software tool - Python-based PRocessing Operator for Climate and Emission Scenarios (PROCES) - was developed to support climate and atmospheric chemistry modeling studies. PROCES was designed to cover global and regional scale modeling domains, which correspond to GEOS-Chem and CMAQ/CAMx models, respectively. This tool comprises of one main system and two units of external software. One of the external software units for this processing system was developed using the GIS commercial program, which was used to create spatial allocation profiles as an auxiliary database. The SMOKE-Asia emissions modeling system was linked to the main system as an external software, to create model-ready emissions for regional scale air quality modeling. The main system was coded in Python version 2.7, which includes several functions allowing general emissions processing steps, such as emissions interpolation, spatial allocation and chemical speciation, to create model-ready emissions and auxiliary inputs of SMOKE-Asia, as well as user-friendly functions related to emissions analysis, such as verification and visualization. Due to its flexible software architecture, PROCES can be applied to any pregridded emission data, as well as regional inventories. The application results of our new tool for global and regional (East Asia) scale modeling domain under RCP scenario for the years 1995-2006, 2015-2025, and 2040-2055 was quantitatively in good agreement with the reference data of RCPs.

• 대한환경공학회지
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• 제31권4호
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• pp.294-299
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• 2009

다이옥신의 대기 중 오염수준 및 거동을 조사하기 위해 청주시를 대상으로 3지점(공단, 주거/상업 및 농촌지역)에서 2008년 겨울철, 봄철, 및 여름철에 가스상과 입자상으로 나누어 시료를 채취하였다. 채취된 9개 시료의 대기 중 17개 다이옥신 이성질체의 농도범위는 0.73~2.48(평균 1.41) pg/$m^3$으로 검출되었으며, WHO 2005 TEQ 농도범위는 0.007~0.122(평균 0.051) pg TEQ/$m^3$으로 조사되었다. 이들 농도는 우리나라 다른 도시대기의 농도(불검출~2.149 pg TEQ/m3 )와 유사하거나 낮은 수준을 나타내었다. 대기 중 다이옥신은 대부분이 입자상태로 존재하고 있었으며(총 농도의 54~98%), 시료채취 시기나 지점에 관계없이 유사한 이 성질체 패턴을 나타내었다. 이성질체 분포 비교 및 통계적 해석결과, 청주시 대기 중 다이옥신은 특정한 오염원에 의한 영향은 미비하며 일반적인 연소공정에 의한 영향을 받고 있는 것으로 판단된다.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제14권7호
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• pp.669-679
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• 2008

웹을 이용한 정보 공개 및 검색이 확대됨에 따라 웹 검색 엔진도 지속적인 주목을 받고 있다. 이에 따라 웹 검색 엔진의 다양한 기술적 문제를 해결하고자 하는 연구가 있었음에도 웹 검색 엔진의 질의 처리 시스템에 대한 기술적 내용은 잘 다뤄지지 않았다. 질의 처리 시스템의 경우 소프트웨어 아키텍처나 운영 기법을 고안하기 어렵기 때문에 본 논문에서는 구현된 상용 시스템을 바탕으로 관련 기술을 소개하고자 한다. 구현된 질의 처리 시스템은 6,500 만개 웹 문서를 색인하여 일 500만개 이상의 사용자 질의 요청을 수행하는 큰 규모의 시스템이다. 구현한 시스템은 질의 처리 결과를 재사용하기 위해 계층적 캐시 기법을 적용했으며, 저장된 캐시 데이타는 4계층으로 구성된 데이타 저장소에 분산 저장되는 것이 특징이다. 계층적 캐시 기법을 통해 질의 처리 용량을 400% 정도로 향상 시킬 수 있었으며 이를 통해 서버 구축비용을 70% 정도 절감할 수 있었다.

• 해양환경안전학회지
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• 제23권4호
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• pp.432-438
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• 2017

본 연구의 주목적은 기존선형을 바탕으로 연료 절감이 가능한 표준화된 개조선형을 개발하는 것이다. 설계 흘수와 설계 선속을 고려하여 대상선박의 선수부 형상을 검토하였다. 실제 운항 상태 별로 대상선박에 대하여 저항성능을 평가하였다. 상용 전산유체역학(CFD) 코드와 수조 모형시험 자료는 유효마력 평가를 위해 사용되었다. 실제 운항 상태를 고려하여 최소저항을 가지는 3가지 개조선형을 제시하였다. 제시된 개조선형은 고객이 선택가능 하다는 점에서 고객 맞춤형 기성품 선형이라고 명하였다. 개조선형 별로 실제 운항 상태에 따라 유효마력을 추정하였다. 가장 낮은 흘수에서 운항할 경우, 기존선형과 비교하여 볼 때 개조3 선형의 저항성능은 저속영역인 16~18노트에서 약 11~16 %로 향상된 결과를 보여 주었다. 중간 흘수인 8.3m에서 운항할 경우, 개조3 선형의 저항성능은 저속영역에서 기존선형보다 약 6~11 %로 향상된 결과를 보여 주었다. 가장 높은 흘수인 9.5m에서 운항할 경우, 모든 선형의 저항성능은 저속영역에서 큰 차이를 보이지 않았다.

• 건축역사연구
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• 제7권4호
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• pp.175-190
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• 1998

The formation of Chinese Town in Malacca of Malaysia and Singapore would explain that Chinese gradually played an important role of commerce and urban service according to the Western European advance to southeast Asia and the construction of colonial cities from the 16th century to 19th and massed residence in many cites of southeast Asia. Chinese was usually separated from the Western European by western colonial policy and city planning. Common architectural characteristics in Chinese towns of Malaysia can refer to the transmission of the Chinese architectural material, the combination of dwelling and commerce in a house and the space organization centered on a court or an air well in the narrow and long site, lying adjacent to street etc. The Chinese dwellings in Malaysia rooted with Chinese settlement in southeast Asia. The Chinese dwellings was not always a shop on 1th floor and a dwelling on 2nd floor before the 19th century. But as Chinese immigration and commercial activity progressed in earnest in the early of 19th century, the row house of Chinese for dwelling was autonomously changed to two functional shophouse for dwelling and commerce. Chinese row house can refer to the use of Malay regional material, change of symmetrical Chinese traditional housing type by the narrow and long site and the tendency of the eclectic elevation of Western and China. Another architectural characteristics of the shophouse is an appearance of the continuous verandah with a cover regulated by Stamford Raffles in Singapore. This regulation was applied to architecture in Chinese Town as Stamford Raffles constructed Singapore. It was spread to South China reversely and became the regulation of streetscape for the modern city. Shophouse of Chinese towns in Southeast Asia and south China can be understood by context of Chinese immigration, colonialism, housing type of commerce and dwelling and the Western European city planning.

• 건축역사연구
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• 제9권2호
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• pp.65-84
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• 2000

The region of Southeast Asia had already experienced rapid urbanization and cultural change before the East Asia region did. None the less, nowadays shophouses and rowhouses still form the major portion of streets in Chinese town in Southeast Asia countries. The purpose of this study is to examine the adaptation process of shophouse and rowhouse in the Southeast Asia region and the architectural characteristics between the middle of 18th and the early of 20th, which Chinese people of the region inherit and develop, for more thorough understanding of cultural adaptability and regionalism of Chinese architecture in Southeast Asia. The common fact found in the Southeast Asia region is that Chinese people in countries of this region gradually started to live densely as a group in a certain zone in city area since they got to play important roles in commerce, trade and service works related with cities, due to European countries' advance into Southeast Asia and their construction of colonial cities in the region. Chinese people in the region utilized residential rowhouse and special shophouse, which is a kind of shop adapted from rowhouses' sitting room or storage, for their commercial and industrial activities in urban areas, which had problems of limited space. They also realized high densities through vertical expansion of space in order to adjust to changing urban structure under execution of urban planning in cities of colonial area and rapid urbanization. Even though residence of Chinese in Southeast Asia was influenced by new political, social, economic and cultural rules of European colonies in Southeast Asia, it has continuously succeeded to the cultural tradition of China, their home country, in terms of planning principle which puts air well in the middle and hierarchial spacial construction method. Appearance of the open connected verandah, designed by Stamford Raffles, the founder of Singapore, can be regarded as one of the architectural characters. Hence, Chinese residence in cities of Southeast Asia can be understood as a new regional architectural culture in the context of European countries' urban planning and urbanization of colonial areas, Immigrants from southern China and their role, their adjustment to urban areas by utilizing mixed type houses of residence and business, cultural tradition of Chinese home country.

• 건축역사연구
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• 제20권2호
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• pp.23-38
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• 2011

France is known to be making particular efforts to maintain its traditional urban architectural culture by diverse measures including the implementation of urban policies. However, France is facing up to the need to pursue modern urbanization in keeping with the requirements of the current times. Thus, this paper examines with what priority France is attempting to reflect in its current urban policies its determination to retain its urban architectural tradition and to recreate its capital city of Paris as a future European hub city. To that end, the paper first seeks to analyze Paris' policies for urban architecture from diachronic perspectives in a bid to determine Paris' urban architectural culture. Second, the study attempts to examine within the purview of the paradigm of contemporary urban architectural designs how Paris is pursuing the two conflicting purposes of the preservation of tradition and modern urbanization through the Paris Local Urbanization Plan (or Plan Local d'Urbanisme [PLU]). First, the findings indicate that Paris is applying the principle of a sustainable development plan in all fields of environment, economy and society. In terms of environmental sustainability, Paris is trying to improve the life quality of its citizens through the establishment of efficient mass transportation systems and the expansion of its green belt areas. In terms of social sustainability, Paris is implementing policies to ensure social diversity through housing policies. Also, in terms of economic sustainability, Paris is trying to expand employment and bolster its urban functions by conserving commercial activities and developing peripheral urban areas. Second, the findings indicate that Paris' policy of recovering its traditions takes priority over that of creating a sustainable city.

• 한국전자통신학회논문지
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• 제10권6호
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• pp.665-670
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• 2015

본 논문은 마이크로웨이브 수신기 구성을 위한 광대역 RF 증폭기를 설계 및 제작하였다. 제안한 광대역 RF 증폭기는 수신된 신호의 안정적인 증폭을 위하여 소스단자에 연결되는 비아까지 EM설계를 하였으며, 능동소자의 소오스(Source) 측이 이상적인 접지(GND)로 동작함에 따라 발진하는 요소를 최소화 하여 광대역에서 일정한 이득 특성 및 안정적인 증폭특성을 얻도록 하였다. 상용 GaAs FET를 사용하고, 광대역 마이크로웨이브 수신기의 IF 주파수 대역인 720 MHz, 4,595 MHz와 6,035 MHz에서 동작하도록 입력 및 출력 정합회로를 구성하였다. 제작 및 측정결과 500 MHz ~ 7 GHz의 광대역 특성을 나타내었으며, 전압이득은 737.5 MHz에서 6.0575 GHz까지 10.635 dB ~ 13.129 dB, 기본파와 제2차 고조파 사이에서 20 dBc 이상의 고조파 억압특성을 나타내었다.