• 정보처리학회논문지C
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• 제15C권3호
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• pp.141-148
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• 2008

2006년 겨울 Microsoft사에서 새롭게 출시한 Windows Vista는 기존의 Windows 운영체제와 비교해서 강력한 보안 메커니즘을 제공하고 있다. 하지만 컴퓨터가 범죄에 사용될 경우, 포렌식 관점에서는 새로운 보안 메커니즘으로 인하여 저장 장치에 저장되어 있는 범죄와 관련된 데이터를 획득하기가 더욱 힘들어진다. 본 논문에서는 Windows Vista에서 새롭게 사용하는 보안 메커니즘인 BitLocker에 대해 분석하고, 이전 Windows 버전에서 사용했던 UAC과 EFS에 대해서 변경된 점에 대해서 살펴보고 포렌식 관점에서 주요 보안 이슈를 살펴본다. 또한 포렌식 관점에서 활용할 수 있는 기타 Windows Vista 특징에 대해서 살펴본다.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2004년도 봄 학술발표논문집 Vol.31 No.1 (A)
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• pp.142-144
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• 2004

본 논문은 Windows CE의 파일 시스템을 개발하기 위해 필요한 Windows CE .NET 4.0이 제공하는 Platform Builder 통합 개발 환경 툴을 이용하여 파일 시스템 필터를 사용하여 파일시스템을 설계한다. 그리고, Windows CE 에서 사용하는 파일 시스템 필터 encfilt.dll를 이용하여 Windows CE 파일 시스템을 개발할 수 있는 환경을 설정한다.

• 한국실내디자인학회논문집
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• 제22권4호
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• pp.94-103
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• 2013

This study investigated the windows and doors of traditional houses in Jecheon, designated as a cultural assets in Chungcheongbuk-do. It aimed to contribute to the study of korean traditional architecture by finding the characteristics of windows and doors, and to the preservation and reuse policy of local cultural assets. This study was conducted using the research methods of the literature and field survey, and it was to analyze and to compare the existing data and a current status. The result are as followings. Firstly, the windows and doors of kitchen in An-chae were generally installed double swinging type with wooden board door(板張門). Secondly, the windows and doors of An-bang were generally installed double swinging type with slender-ribbed windows and doors(細箭窓戶), were mostly installed Merum(遠音). Thirdly, the windows and doors of Daechung(大廳) towards the backyard were generally installed double swinging type with wooden board door, corrugated cardboard door(骨板門) and slender-ribbed windows. Lastly, the windows and doors of Sarang-bang in a house of nobility(班家) was installed triple windows and doors.

• KIEAE Journal
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• 제7권5호
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• pp.87-92
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• 2007

As expansion of balconies at apartments has been legalized, the major function of the balconies as a thermal buffer zone is disappearing. This weakens the ability of window to insulate heat and multiplies surface condensation. Thus more and more residents require solutions to increasing surface condensation and aggravation in thermal comfort. This study intends to provide basic data by evaluating performance of triple layered Low-E windows, triple layered clear windows, double layered Low-E windows and double layered clear window used for expanded balconies and marketed within the country in terms of surface condensation and thermal environment through simulation. Results revealed that no surface condensation occurred at double layered Low-E windows and triple layered Low-E windows. Surface condensation took place at double layered clear windows and triple layered clear windows at a relative humidity of 60%. Thermal environment analysis suggested that double layered clear windows showed the most time falling into the range of comfort at $23^{\circ}C$. The figure were $22^{\circ}C$ for triple layered clear windows, $22^{\circ}C$ for double layered Low-E windows and $21^{\circ}C$ for triple layered Low-E windows.

• 디지털융복합연구
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• 제10권5호
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• pp.223-232
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• 2012

최근 개인정보에 대한 유출과 침해행위가 급증하면서 악의적인 목적의 피해사례가 급증하고 있다. 대부분의 사용자가 윈도우즈 운영체제를 사용하고 있으며, 최근 Windows 7 운영체제가 발표되면서 Windows 7 OS 환경에서의 침해대응 기법에 대한 연구가 필요하다. 현재까지 개발된 침해사고 대응 기법은 대부분 Windows XP 또는 Windows Vista를 중심으로 구현되어 있다. 윈도우즈 운영체제에서 시스템 침해사고를 효율적으로 분석하기 위해서는 시스템에서 생성되는 이벤트 정보의 시간정보 및 보안 위협 가중치 정보를 중심으로 이를 시각적으로 분석할 필요가 있다. 따라서 본 논문에서는 최근 발표된 Windows 7 운영체제에서 생성되는 시스템 이벤트 정보에 대해 시각적으로 분석하고 이를 통해 시스템 침해사고를 분석할 수 있는 시스템을 설계 및 구현하였다. 본 논문에서 개발된 시스템을 이용할 경우 보다 효율적인 침해사고 분석이 가능할 것으로 예상된다.

• ETRI Journal
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• 제40권1호
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• pp.111-121
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• 2018

To find the emerging patterns (EPs) in streaming transaction data, the streaming is first divided into some time windows containing a number of transactions. Itemsets are generated from transactions in each window, and then the emergence of itemsets is evaluated between two windows. In the tilted-time windows model (TTWM), it is assumed that people need support data with finer accuracy from the most recent windows, while accepting coarser accuracy from older windows. Therefore, a limited array's elements are used to maintain all support data in a way that condenses old windows by merging them inside one element. The capacity of elements that accommodates the windows inside is modeled using a particular number sequence. However, in a stream, as new data arrives, the current array updating mechanisms lead to many null elements in the array and cause data incompleteness and inaccuracy problems. Two models derived from TTWM, logarithmic TTWM and Fibonacci windows model, also inherit the same problems. This article proposes a novel push-front Fibonacci windows model as a solution, and experiments are conducted to demonstrate its superiority in finding more EPs compared to other models.

• Journal of Information Technology Applications and Management
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• 제11권1호
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• pp.69-82
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• 2004

The role of switching costs in customer retention has been posited, but has not been subjected to rigorous empirical testing. Therefore, our main focus is on the factors that influence whether consumers will have intention to switch or stay with an incumbent technology (e.g., MS-Windows). Based on consumer survey with MS-Windows users, we find empirical support for the link between the existence of compactible software, consumer's expertise in MS-Windows and intention to stay with MS-Windows. Specifically, switching costs are found to be positively associated with the existence of compatible software. Further, the lack of expertise in MS-Windows on the part of consumers tends to increase the likelihood that they will rely on current MS-Windows, rather than switch to other alternative operating systems.

• 융합보안논문지
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• 제6권3호
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• pp.1-12
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• 2006

최근 들어 악성코드와 관련된 정보침해사고는 대부분 Microsoft Windows에서 발생하고 있으며, 해마다 증가 추세에 있다. 이러한 악성코드 중에 커널기반의 악성코드는 Windows 커널 내에서 자신의 정보를 은폐하고 공격코드를 추가하는 방식으로 동작하고 있어 기존의 보안대응책으로 탐지 및 대응이 어려운 특징을 갖는다. 기존의 정보보호시스템이 알려지지 않은(또는 새로운) 커널 공격 기법에 대한 대응이 거의 불가능한 이유는 "공격 시그너쳐"를 기반으로 하고 있기 때문이며, 보다 근본적인 이유는 Windows 커널 정보 및 관련 메커니즘의 부재에 있다. 이로 인해, 커널 공격기법에 대한 현재의 대응기법 수준은 매우 미미하며, 현장에서 활용 가능한 커널공격 대응시스템은 전무한 실정이다. 본 논문에서는 다양한 Windows 커널 공격에 대한 유형과 기법을 정형화하고, 이를 기반으로 커널 메모리 공격 대응기법, 프로세스 및 드라이버 공격 대응기법, 파일시스템 및 레지스트리 공격 대응기법으로 구분하여 효과적인 Windows 커널 공격대응기법과 메커니즘을 제안하였다. 알려지지 않은 Windows 커널 정보 및 관련 메커니즘의 수집과 분석을 통하여 Windows 커널 공격에 대한 대응기법 및 메커니즘의 구현에 적극 활용하였으며, 시스템 활용도 및 안정성을 극대화하기 위해 Windows 멀티 플랫폼을 지원하도록 구현하였다. 다양한 실험을 통하여 제안된 대응시스템이 커널 공격기법에 대해 기존의 정보보호시스템보다 우수한 방어능력을 갖고 있음을 확인하였다.

• KIEAE Journal
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• 제13권3호
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• pp.71-78
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• 2013

A need for building energy efficiency is on the issue since energy demand in the building stock in Korea represents about 24% of the final energy consumption. As a way of improving the thermal performance of buildings for reducing maintenance costs and environmental conservation, a lot of effort is shown to improve the building energy efficiency by applying improvement of envelope insulation performance for buildings whose energy efficiency is low relatively through the remodeling. The windows of building envelopes are areas that lead to the biggest heat loss in the building. So windows are considered to be the primary target of energy efficiency in remodeling and various studies for windows have been done. Currently, however, only U-factor and airtightness of windows performance are regulated. Window wall ratio(WWR) and solar heat gain coefficient(SHGC) of windows are not considered when conducting the remodeling. In this study appropriate performance of windows(U-factor and SHGC) for existing residential is proposed according to the window wall ratio by using EnergyPlus. As the results of this study, the U-factor of windows representing the maximum energy savings is $1.0W/m^2K$ but in case of SHGC, the values that indicate the maximum energy savings are different depending on the window wall ratio. Therefore, when conducting the remodeling of windows, to determine energy efficiency by considering only the U-factor is inadequate so it is necessary that appropriate windows are applied to buildings by considering window wall ratio and windows properties(U-factor and SHGC).

• 한국산업보건학회지
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• 제20권3호
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• pp.175-183
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• 2010

Windows are widely used for natural ventilation of the various buildings. Especially high level windows as a part of industrial ventilation systems, play a crucial role in natural ventilation. Compared to mechanical ventilation system, natural ventilation has the advantage of lower installation and operating costs. In general, high level windows for industrial buildings have three types; louver type, 45$^{\circ}$ open type and 90$^{\circ}$ open type. Based on previous studies, it was found that the louver type and 45$^{\circ}$ open type are very effective in reducing rainwater penetration, but they did not have enough ventilation efficiencies. Preliminary tests were performed with the various types of windows. It was found that a 90$^{\circ}$ open double layer type window was the best among those which tested in our preliminary tests. Simulated rain was used to estimate the amount of rain penetrated through windows and to observe the paths of rain penetration. Various 90$^{\circ}$ open windows were tested to find the windows with minimum rain penetration and maximum ventilation efficiency.