• Journal of Internet Computing and Services
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• v.23 no.1
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• pp.87-93
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• 2022

Since 99% of PCs operating in the defense domain use the Windows operating system, detection and response of Window-based malware is very important to keep the defense cyberspace safe. This paper proposes a model capable of detecting malware in a Windows PE (Portable Executable) format. The detection model was designed with an emphasis on rapid update of the training model to efficiently cope with rapidly increasing malware rather than the detection accuracy. Therefore, in order to improve the training speed, the detection model was designed based on a Bidirectional LSTM (Long Short Term Memory) network that can detect malware with minimal sequence data without complicated pre-processing. The experiment was conducted using the EMBER2018 dataset, As a result of training the model with feature sets consisting of three type of sequence data(Byte-Entropy Histogram, Byte Histogram, and String Distribution), accuracy of 90.79% was achieved. Meanwhile, it was confirmed that the training time was shortened to 1/4 compared to the existing detection model, enabling rapid update of the detection model to respond to new types of malware on the surge.

• The Journal of the Acoustical Society of Korea
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• v.28 no.5
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• pp.461-470
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• 2009

We investigate and analyze the problems encountered in frame-based estimation of TDOA (Time Difference of Arrival) using CPSP function. Spectral leakage occurring in framing of a speech signal by a rectangular window could make estimation of CPSP spectrum inaccurate. Framing with other windows to reduce the spectral leakage distorts the signal due to the asynchronous weighting around the frame specifically both ends of the frame. These problems degrade the performance of the CPSP-based TDOA estimation. In this paper, we propose a method to alleviate those problems by pre-emphasis of the speech signal. It reduces the influence of the spectral leakage by reducing dynamic range of the spectrum of a speech signal with pre-emphasis. To validate the proposed method of pre-emphasis, we carry out TDOA estimation experiments in various noise and reverberation conditions, Experimental results have shown that the framing of pre-emphasized microphone output by a rectangular window achieves higher success rate of TDOA estimation than any other framing methods.

• The Journal of the Korea Contents Association
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• v.17 no.10
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• pp.1-8
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• 2017

As the recent advancement of military equipment has been accelerated, it is becoming more important to act as an inspection device that verifies the performance of equipment in real time. Most of the inspection equipments were developed on the Windows OS based system. considering development convenience and development period. However, sice the data communication between these models occurs asynchronously, there is a problem that it is difficult to guarantee real-time performance of the window-based inspection equiment. To solve these problems, we use real-time commercial solutions to guarantee the real-time performance of Windows-based inspection equipment. In this paper, we propose a method of designing and implementing the inspection equipment software based on Real-Time implanted Kernel-Multi Processor (RTiK-MP) operating in Windows environment. In addition, real-time performance data accuracy was measured through a high-speed communication tool and interlocking test to verify the performance of the inspection device based on the real-time porting kernel.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.655-657
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• 2002

본 논문에서는 스테레오 영상에서 두 영상간의 깊이(Depth) 정보를 이용해서 영역을 기반으로 한 영상매칭을 수행한 추 사람의 얼굴 영역을 결정한다 영역 결정은 설정된 탐색 윈도우에 의해 좌, 우 영상간의 MSE(Minimum Square Error)를 검색하는 알고리즘을 제안한다. 매칭 과정에서 발생하는 영역 오류를 보정하기 위해서 타원 마스크를 이용하는 방법을 제안하며 실행 시간을 줄이기 위하여 2D 도메인에서 쿼드트리(Quad-tree) 윈도우를 사용한다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.430-432
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• 2004

기존 PVR은 예약녹화를 하는 경우 사용자는 컴퓨터가 이이 부팅되어있는 상태에서 시간을 예약해야 한다. 만약 사용자가 미리 예약녹화를 하지 않고 외출했다면 집안의 다른 사람의 도움 없이는 녹화는 불가능하다. 이런 단점을 해결하기 위하여 본 논문에서는 MS 윈도우 기반에서 PC용 TV수신카드와 WOL를 이용하여 원격지에서도 전원이 꺼진 컴퓨터에 휴대폰을 통하여 혼자서 예약 녹화할 수 있는 MS윈도우 기반의 PVR 시스템을 구현하였다.

• Proceedings of the Korea Multimedia Society Conference
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• 2003.11b
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• pp.905-908
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• 2003

본 논문에서는 내장형 리눅스 환경에서 XML기반 EBKS용 전자책 리더 개발에 대한 내용이다. 개발된 단말기는 내장형 리눅스 타겟보드에서 한국형 전자책 문서 표준에 기반한 XML 문서를 Qt SAX 파서를 이용하여 파싱하고, 크로스 플랫폼형 윈도우 시스템인 QWS(Qt windows system)를 이용하여 디스플레이한다. 개발된 전자책 리더는 리눅스 환경 뿐만 아니라 다양한 윈도우 플랫폼에서 신속하고 쉽게 개발 가능하며 SAX 파서를 사용하므로 DOM 인터페이스에 비해 메모리를 적게 사용한다.

• Venture DIGEST
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• s.61
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• pp.9-9
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• 2004

세계 10대 휴대폰기업으로 성장한 우리나라는 명실공히 휴대폰 기술강국으로 부상하였다. 2000억 규모로 추정되는 휴대폰 윈도우시장에서도 앞선 기술력을 기반으로 한 성장세가 뚜렷하다. 많은 휴대폰 부품업체들이 이 시장에 진출해 다양한 제품을 출시하며 휴대폰 주요 부품의 국산화율을 높이고 있다.

• The KIPS Transactions:PartC
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• v.16C no.4
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• pp.477-486
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• 2009

This paper proposes a dynamic bandwidth allocation (DBA) algorithm with adaptive maximum transmission window (DBA-AMTW) to increase channel utilization in Ethernet passive optical networks (EPONs). A polling mechanism in EPON determines channel utilization and puts constraints on DBA algorithm and scheduling. DBA algorithms based on interleaved polling with stop (IPS) allocate transmission windows to optical network units (ONU) considering requests of all ONUs. However channel idle time when any ONU does not transmit packets decreases channel utilization. Proposed DBA-AMTW improves efficiency of a network and allocates transmission windows effectively by appropriate DBA computation from REPORT messages of all ONUs. An adaptive maximum transmission window for each ONU determined by a DBA computation in the previous scheduling cycle. Simulation results show that the proposed DBA algorithm improves performance of throughput and average delay time.

• The Journal of Society for e-Business Studies
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• v.23 no.3
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• pp.225-237
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• 2018

The demand for processing large data streams is growing rapidly as the generation and processing of large volumes of data become more popular. A variety of large data processing technologies are being developed to suit the increasing demand. One of the technologies that researchers have particularly observed is the data stream clustering with sliding windows. Data stream clustering with sliding windows may create a new set of clusters whenever the window moves. Previous data stream clustering techniques with sliding windows exploit the coresets, also known as group features that summarize the data. In this paper, we present some reformable elements of a group-feature based algorithm, and propose our algorithm that modified the clustering algorithm of the original one. We conduct a performance comparison between two algorithms by using different parameter values. Finally, we provide some guideline for the selective use of those algorithms with regard to the parameter values and their impacts on the performance.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.13-15
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• 2005

최근 윈도우의 취약점을 이용하는 웜 및 바이러스로 인한 정보시스템과 네트워크에 대한 피해가 급속히 증가하고 있다. 윈도우의 취약점을 이용한 공격에 대한 해결방법은 해당 취약점은 적시에 신속하게 패치를 설치하는 것이다. 본 논문에서는 기존의 패치관리시스템이 관리자의 개입을 요구하기 때문에 패치를 신속하게 적용할 수 없는 단점을 보완하여, XML 기술을 기반으로 MS 다운로드 센터에서 패치를 자동으로 다운받아 클라이언트까지 자동으로 보안패치파일을 설치하는 보안패치 자동관리 시스템을 제안한다.