• 한국환경보건학회지
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• 제21권4호
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• pp.56-62
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• 1995

Recently, the traffic noise around residences and schools has become a serious social problem with the increase of the amount of transportation. This study was performed to investigate the sound proof efficiency of windows for traffic noise. The results were as follows 1) The traffic noise in 19 sites among 22 sampling sites was higher value than 65 dB(A) being roadside environment standard level in the daytime when all windows were opened, while the noise in 22 sampling sites was transmitted below standard level when all windows were closed. 2) The transmission loss of sound level at single window and double windows were 10~25 dB(A) and 11~29 dB(A) respectively. 3) The transmission loss of sound level at sampled school with sound proof pannel was 7~8 dB (A), which was lower 2~7 dB(A) than the theoretical value of the influence assessment . 4) The construction cost of double windows was lower 28% even if include the cost of setting up air conditioner for the summer season and the power consuming cost for its operation than that of sound proof pannel for traffic noise. 5) The effect of transmission loss of windows was more influenced by airtight than materials of windows.

• 한국컴퓨터정보학회논문지
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• 제19권6호
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• pp.1-10
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• 2014

본 논문에서는 Windows Azure 기반의 N-스크린 서비스를 위한 실시간 동영상 재생 기법을 제안한다. 이 기법은 각 노드의 성능에 따라 원본 동영상을 차등 분할하여 재생 블록을 생성한다. 그리고 차등 분할한 재생 블록을 해당 노드에 할당하여 트랜스 코딩함으로써 트랜스 코딩 소요시간을 줄인다. 본 논문에서는 시뮬레이션을 통하여 제안한 동영상 재생기법이 기존의 기법에 비해 N-스크린 서비스를 위한 실시간 동영상재생에 효과적임을 보인다. 시뮬레이션에서는 상용화된 클라우드 시스템인 Windows Azure 기반에서 AVI 포맷 300MB 원본 동영상을 각 노드의 성능에 따라 차등 분할한다. 그리고 Windows Azure의 이기종 노드에 분산 할당하여 mp4와 Flv 포맷으로 트랜스 코딩하면서 트랜스 코딩 소요시간을 측정한다. 그 결과 본 논문의 제안 기법이 기존의 균등 분할 기법에 비해 Windows Azure 기반의 N-스크린 서비스의 성능을 향상시킨다.

• Journal of Advanced Marine Engineering and Technology
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• 제27권7호
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• pp.817-825
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• 2003

The amount of damage suffered from the red tide occurring at the near shore is increasing rapidly. The Windows visual system discussed in this paper is developed in order to help minimize the damage. The system is focused on the monitoring the coastal environment. and forecasting the red tide occurrence. Although several similar systems are now existing. most of them are based on the web application. which cause the large response time. limited presentation ability of data. and inability of data storing at client side. The Windows visual system described in this paper operates on the Internet to get the ubiquitous access. One of three components of the Windows visual system. client system is developed as a Windows application in order to overcome the weak points of the previous systems. The gathering. analysis, and monitoring of data can be done at real time using the Windows visual system.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2018년도 춘계 학술논문 발표대회
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• pp.10-11
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• 2018

In the building, the opening penetrates the wall and serves as a spreading channel for smoke and flame in case of fire. In Korea, more than 1,500 fire plume are generated annually, and the number has increased by about 30% over the past five years. Therefore, in the case of windows protecting the opening, fire protection performance is important to prevent the spread of fire. However, in Korea, the standard for window is not clear. In this study, fire tests (EN 13823) for windows were conducted in Korea, and then fire protection performance of windows was compared. As a result of the experiment, PVC windows showed a phenomenon that they could not withstand the temperature during the fire experiment, and AL windows showed a difference in the degree of cracking of the glass.

• 융합보안논문지
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• 제20권5호
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• pp.27-32
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• 2020

Windows Event Log에는 시스템의 전반적인 동작들을 정의하고 있는 Log이며, 해당 파일에는 사용자의 여러 행위 및 이상 징후를 탐지할 수 있는 데이터가 저장되어 있다. 하지만 행위마다 Event Log가 발생함으로써, 로그들을 분석할 때, 상당한 시간이 소요된다. 따라서 본 연구에서는 NSA에서 발표한 "Spotting the Adversary with Windows Event Log Monitoring"의 주요 Event Log 목록을 바탕으로 XML 기반한 Event Log 분석 도구를 설계 및 구현 하였다.

• 제어로봇시스템학회논문지
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• 제17권1호
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• pp.38-46
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• 2011

The OPRoS (Open Platform for Robotic Service) framework provides uniform operating environment for service robots. As an OPRoS-based service robot has to support real-time as well as non-real-time applications, application of Windows NT kernel based operating system can be restrictive. On the other hand, various benefits such as rich library and device support and abundant developer pool can be enjoyed when service robots are built on Windows NT. The paper presents a user-mode component scheduler of OPRoS, which can provide near real-time scheduling service on Windows NT based on the restricted real-time features of Windows NT kernel. The component scheduler thread with the highest real-time priority in Windows NT system acquires CPU control. And then the component scheduler suspends and resumes each periodic component executors based on its priority and precedence dependency so that the component executors are scheduled in the preemptive manner. We show experiment analysis on the performance limitations of the proposed scheduling technique. The analysis and experimental results show that the proposed scheduler guarantees highly reliable timing down to the resolution of 10ms.

• 한국환경과학회지
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• 제20권5호
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• pp.581-587
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• 2011

Industrial natural ventilation systems consist of gravity ventilator, the high/low windows and doors. Especially, the high windows play an important role in the industrial natural ventilation systems. Generally speaking, industrial high windows are divided into 3 types; louver type, $45^{\circ}$ open type and $90^{\circ}$ open type. This study was numerically and experimentally conducted. Three types of windows were tested to know the ventilation characteristics and estimate the ventilation efficiencies. Numerically, computational fluid dynamics software (AIR PAK Ver. 2.0) was used to observe the flow characteristics inside the industrial building and the concentration contours generated by the tracer gas method. Experimentally, the flow visualization technique and the tracer gas method were applied with the model building to characterize the flow pattern inside the model building and to estimate the ventilation efficiencies with the different windows. It was found that $90^{\circ}$ open type window was most effective for the discharge of pollutants from the industrial building. On the other hand, the louver type window was found to be less effective than any other windows.

• 한국인터넷방송통신학회논문지
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• 제17권6호
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• pp.11-17
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• 2017

본 논문에서는 멀웨어 탐지 방법으로 Opcode (operation code)와 실행 파일에서 추출한 Windows API Call로 구성된 특징 벡터를 사용하는 방법을 제안한다. 먼저 PE 파일에서 추출한 opcode와 windows API로 특징 벡터를 구성하고 Bernoulli Naïve Bayes과 K-Nearest Neighbor 분류기 알고리즘을 사용하여 성능을 각각 측정하였다. 실험결과, 제안한 방법과 KNN 분류기를 사용하여 분류하면 95.21%의 멀웨어 탐지 정확도를 얻을 수 있었다. 결과적으로 기존의 Opcode 또는 Windows API 호출 중 하나만 사용하는 방법보다 제안한 방법이 멀웨어 탐지 정확도에서 높은 성능을 보인다.

• 건축역사연구
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• 제6권2호
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• pp.9-22
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• 1997

The results of analyzing opening types in the rear elevations of ninety-six buddhist temples which would be existence can be summarized as follows ; 1) Opening types in the rear elevations of buddhist temples in the Koryo Dynasty were various as the type of doors and windows, and the type of combining with walls. but the fact had something in common that whole door was the swinging pannel one, and the type of the whole window was the lattice and the mullioned casement one. 2) The type of the lattice windows were disappered and the only type of the mullioned casement windows were put in an apperance in the early period of Cho-sun Dynasty. 3) The type of doors + walls and the type of doors + windows in the rear elevations of buddhist temples of the seventeenth century were absolute. Especially the mullioned casement windows were used mainly in buddhist temple of the type of doors + windows. 4) The type of doors + windows in the rear elevations of buddhist temples of the eighteenth century did not be seen, but types of doors + walls and walls + walls which were much enclosed, were mainly put to use in those.

• 정보보호학회논문지
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• 제19권2호
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• pp.75-82
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• 2009

본 논문에서는 전세계적으로 90%이상의 사용자층을 보유하고 있는 윈도우즈 OS의 API에 대한 보안 테스팅 중 Fuzz Testing을 적용하여 그 안전성을 검증하였다. 본 논문에서는 윈도우즈의 시스템 폴더 내에 구현된 함수들을 대상으로 테스팅하기 위해 Fuzz Testing 기반 자동화 방법론인 AWAFT를 제안하였다. AWAFT는 보안 취약점 중 버퍼오버플로우와 함수 파라미터 파싱 오류에 초점을 맞추고 있다. AWAFT를 자동화하기 위한 도구를 구현하였으며 Windows XP SP2 시스템 폴더에 적용한 결과 177개의 프로그램 종료 에러를 발견하였으며, 이 중 10개는 프로그램의 실행 흐름을 변경시킬 수 있는 보안상 위험한 취약점이었다. AWAFT는 윈도우즈 기반으로 개발되는 소프트웨어의 라이브러리에 대해 보안 향상을 위해 적용 가능하다.