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Power Consumption Characterization of Flash Memory SSD
Seungyong Shin,Dongkun Shin 대한전자공학회 2010 ICEIC:International Conference on Electronics, Inf Vol.1 No.1
Solid state disks (SSDs) are replacing hard disk drives (HDDs) due to their high random access performance and low power consumption. Although SSDs are low power storage devices, the power consumptions of SSDs are not negligible as SSDs adopt parallel architectures. In this paper, we analyze the power and energy consumption behaviors of SSDs depending on the I/O request patterns and provide several hints on energy optimization. In addition, our analysis technique enables to extract several architectural features of target SSD which vendors do not provide to users.
디지털 증거물의 법적능력 확보를 위한 정보감사용 e-Forensic 툴 연구
Seungyong Kim,Gyeongyong Kim,Incheol Hwang,Dongsik Kim 한국재난정보학회 2017 한국재난정보학회 논문집 Vol.13 No.2
본 연구는 재해현장에서 발생한 다양한 형태의 디지털 증거물을 채집・분석하는데 있어 디지털 포렌식 기법에 입각하여 효율적으로 재해 현장 디지털 데이터를 채증할 수 있는 e-Forensic 툴 개발에 관한 것이다. 현장에서 채집한 다양한 디지털 증거물이 법적 증거물로 채택되기 위해서는 디지털 증거물이 위변조가 없는 원본과 동일한 상태임을 입증해야만 하는데 이를 본 e-Forensic툴을 이용하여 검증하였다. 이 툴을 활용하면, 현장 수사 중 디지털 파일을 증거로 수집하는 경우에 현장에서 바로 해시값을 생성, 암호화된 디지털 파일에 부가함으로써 디지털 파일의 원본과 사본의 동일성을 보장하고 현장 증거의 무결성을 향상시킬 수 있는 효과가 있음을 증명하였다. This research is about the development of e-forensic tool that extract & analyze different forms of digital evidence that individuals come across in a disaster scene. The tool utilizes digital forensic techniques which makes the tool efficient in any disaster analysis situation. In order for the forensic evidence to be selected as legal evidence, the evidence needs to be proven that it is in its original state with no forgery involved. This is where the e-forensic tool comes in, as its ability to collect digital evidence during investigation has proven; that the tool can keep the evidence in its original state and increase the integrity by generating hash TAG and adding the forensic evidence to a password encoded file.
An Ant Colony Optimization Heuristic for a Postal Collection Problem
Seungyong Cho(조승용),Kyungil Choe(최경일) 한국SCM학회 2010 한국SCM학회지 Vol.10 No.1
This study deals with an application of ant colony optimization for a postal collection problem (PCP) in the Seoul International Post Office (SIPO). The subcontractor of SIPO collects express mail parcels using different types of vehicles. The PCP has the unique cost structure which considers only effective traveling distances. An ant colony system heuristic with λ- interchange improvement is proposed to solve the PCP. For a real PCP, our heuristic reduces the number of vehicles and the total distance less than those of previous studies.