• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2009.05c
• /
• pp.61-64
• /
• 2009

The number of apartment houses has accounted for more than 50% of all domestic residential types in Korea since 1980s. However, the apartment house has environmentally disadvantageous conditions such as highly residential-density and potential falls by children aged seven years and under through windows. In this study, we aim to suggest some ideas to improve domestic performance assessment methods and criteria of window Insect screens for protection on security and fall prevention by analyzing domestic standard with several overseas codes related to the screens for windows.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.31 no.4
• /
• pp.1-9
• /
• 2008

JIT 생산시스템이 세계적으로 많은 회사에 적용됨에 따라 earliness와 tardiness의 페널티를 동시에 최소화하는 문제에 대한 많은 연구가 진행되어 왔다. 이 연구에서는 한정된 완료시간의 편차에 대해서는 페널티를 부과하지 않는, 즉 허용오차가 존재할 때, 공통의 납기로부터 평균제곱편차(MSD : Mean Squared Deviation)를 최소화하는 단일기계 문제를 다룬다. 허용오차가 존재하는 MSD 문제에서 최적의 공통 납기를 결정하는 방법을 개발한다. 스케줄과 허용 오차가 주어질 때, 최적의 납기를 찾는 두 개의 선형시간이 소요되는 알고리즘을 제시한다. 주어진 허용오차 중 하나는 가장 짧은 가공시간을 가지는 작업의 절반보다 작은 경우이며 다른 하나는 허용오차가 임의인 경우이다.

• Convergence Security Journal
• /
• v.6 no.3
• /
• pp.1-12
• /
• 2006

Malicious codes have been widely documented and detected in information security breach occurrences of Microsoft Windows platform. Legacy information security systems are particularly vulnerable to breaches, due to Window kernel-based malicious codes, that penetrate existing protection and remain undetected. To date there has not been enough quality study into and information sharing about Windows kernel and inner code mechanisms, and this is the core reason for the success of these codes into entering systems and remaining undetected. This paper focus on classification and formalization of type target and mechanism of various Windows kernel-based attacks, and will present suggestions for effective response methodologies in the categories of, "Kernel memory protection", "Process & driver protection" and "File system & registry protection". An effective Windows kernel protection system will be presented through the collection and analysis of Windows kernel and inside mechanisms, and through suggestions for the implementation methodologies of unreleased and new Windows kernel protection skill. Results presented in this paper will explain that the suggested system be highly effective and has more accurate for intrusion detection ratios, then the current legacy security systems (i.e., virus vaccines and Windows IPS, etc) intrusion detection ratios. So, It is expected that the suggested system provides a good solution to prevent IT infrastructure from complicated and intelligent Windows kernel attacks.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.29 no.6
• /
• pp.1393-1401
• /
• 2019

Recently as voice authentication function is installed in the system, it is becoming more important to accurately authenticate speakers. Accordingly, a model for verifying speakers in various ways has been suggested. In this paper, we propose a new method for verifying speaker verification using a Short-time Fourier Transform(STFT). Unlike the existing Mel-Frequency Cepstrum Coefficients(MFCC) extraction method, we used window function with overlap parameter of around 66.1%. In this case, the speech characteristics of the speaker with the temporal characteristics are studied using a deep running model called RNN (Recurrent Neural Network) with LSTM cell. The accuracy of proposed model is around 92.8% and approximately 5.5% higher than that of the existing speaker certification model.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.19 no.3
• /
• pp.636-644
• /
• 2015

This research aims to suggest methods to improve object tracking performance by combining CAM shift algorithm with 8-way search window, and reduce arithmetic operation by reducing the number of frame used for tracking. CAM shift has its adverse effect in tracking methods using signature color or having difficulty in tracking rapidly moving object. To resolve this, moving search window of CAM shift makes it possible to more accurately track high-speed moving object after finding object by conducting 8-way search by using information at a final successful timing point from a timing point missing tracking object. Moreover, hardware development led to increased unnecessary arithmetic operation by increasing the number of frame produced per second, which indicates efficiency can be enhanced by reducing the number of frame used in tracking to reduce unnecessary arithmetic operation.

• Review of KIISC
• /
• v.5 no.1
• /
• pp.5-17
• /
• 1995

멱산연산 알고리듬에는 사전계산없이 g와 n이 주어지면$g_n$ 대해 서전 계산을 하여 그 결과를 메모리에 저장하여 두고 n이 주어지면$g_n$을 계산하는 알고리듬이 있다. Binary method, window method등의 알고리듬은 전자에 해당하는 것이고 BGMW method와 LL method등은 후자에 해당하는 것이다. 이러한 멱승연산 알고리듬을 PC486과 586에서 C언어로 구현하여 그 결과를 비교 분석하였다.

• ETRI Journal
• /
• v.26 no.3
• /
• pp.241-251
• /
• 2004

We propose two improved scalar multiplication methods on elliptic curves over $F_{{q}^{n}}$ $q= 2^{m}$ using Frobenius expansion. The scalar multiplication of elliptic curves defined over subfield $F_q$ can be sped up by Frobenius expansion. Previous methods are restricted to the case of a small m. However, when m is small, it is hard to find curves having good cryptographic properties. Our methods are suitable for curves defined over medium-sized fields, that is, $10{\leq}m{\leq}20$. These methods are variants of the conventional multiple-base binary (MBB) method combined with the window method. One of our methods is for a polynomial basis representation with software implementation, and the other is for a normal basis representation with hardware implementation. Our software experiment shows that it is about 10% faster than the MBB method, which also uses Frobenius expansion, and about 20% faster than the Montgomery method, which is the fastest general method in polynomial basis implementation.

• Proceedings of the IEEK Conference
• /
• 2002.07c
• /
• pp.1678-1680
• /
• 2002

Stereo matching technique is used in many practical fields like satellite image analysis and computer vision. In this paper, we suggest a method to extract a target object image from a complicated background. For example, human face image can be extracted from random background. This method can be applied to computer vision such as security system, dressing simulation by use of extracted human face, 3D modeling, and security system. Many researches about stereo matching have been performed. Conventional approaches can be categorized into area-based and feature-based method. In this paper, we start from area-based method and apply area tracking using scanning window. Coarse depth information is used for area merging process using area searching data. Finally, we produce a target object image.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
• /
• 1995.11a
• /
• pp.151-162
• /
• 1995

보다 짧은 길이의 덧셈/뺄셈 사슬($addition_{traction-chain}$)을 찾는 문제는 정수론을 기반으로 하는 많은 암호시스템들에 있어서 중요한 문제이다. 특히, RSA에서의 모듈라멱승(modular exponentiation)이나 타원 곡선(elliptic curve)에서의 곱셈 연산시간은 덧셈사슬(addition-chain) 또는 덧셈/뺄셈 사슬의 길이와 정비례한다 본 논문에서는 덧셈/뻘셈 사슬을 구하는 새로운 알고리즘을 제안하고, 그 성능을 분석하여 기존의 방법들과 비교한다. 본 논문에서 제안하는 알고리즘은 작은윈도우(small-window) 기법을 기반으로 하고, 뺄셈을사용해서 윈도우의 개수를 최적화함으로써 덧셈/뺄셈 사슬의 길이를 짧게 한다. 본 논문에서 제안하는 알고리즘은 512비트의 정수에 대해 평균길이 595.6의 덧셈/뺄셈 사슬을 찾는다.

• Convergence Security Journal
• /
• v.10 no.1
• /
• pp.19-27
• /
• 2010

Nowadays, the network's speed and internet technology are progressing rapidly but mill wares are occurring frequently through the Window's weak point. Since the malwares have various infection types and characteristics, it is hard to detect them by the virus vaccine and to cure them. This paper analyzes the type and characteristics of the mal ware and proposes a script technology that can find the location of the mal ware by the program and respond rapidly to the new kind of malwares.