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Recent years witness the prevalence of IaaS (Infrastructure as a Service) cloud services. Virtual machines (VMs) are provided to users as a kind of product by IaaS providers. New computing architecture makes it difficult for traditional forensics tools to collect evidences from the target VM. In this paper, we propose a novel proactive forensic approach named VMForensics, which provides both dynamic...
A high gain cavity-backed circular patch antenna array is designed by using surface micromachining technology. The antenna array is fed by eight-ways power divider, which is designed by using rectangular micro-coaxial transmission line. The antenna array with the specified size of 18.5mm×9.76mm×0.36mm and bandwidth shows around 6 GHz (59∼65GHz) under the condition of voltage standing wave ratio (VSWR)...
The petroleum products leakage from the storage tank bottom could not be discovered in time without store contents emptied out because of the bottom not being accessed easily and the amount of leakage in the beginning being too small to be detected by the ways now available such as interstitial monitoring, liquid sensing probes and cables, volumetric and mass measurement methods, statistical inventory...
Cloud computing service has been evolved in providing a whole virtual data center from selling scattered virtual machines (VMs). Process Monitoring of a VM is a fundamental feature to guarantee the security of the virtual data center because of the rapid growth of the malware. Existing approaches are mainly based on virtual machine introspection (VMI) technique to isolate the monitor out-of-vm and...
This paper presented the design method of a digital-controlled variable voltage source with current monitor function. The hardware of system mainly consists of FPGA, DAC, programmable gain amplifier, current sensing circuit and comparator. By using high-speed analog comparator to convert over-current time to length of digital pulse, the FPGA could monitor the amplitude of current dynamically. In aspect...
The design problems of localization algorithm, distribution density estimation and node's moving path for data collection in multi-layers mobile wireless senor network are investigated. To ensure estimating accurately the node density, this paper proposes a new movement control strategy for fusion nodes based on probabilistic coverage model. This method completed the unknown node localization through...
Wireless sensor networks 〈WSNs〉 always have to face the dilemma between limited battery energy and large quantity of data transmission. Breaking data stream into blocks has proved to be an effective way to increase the utilization of the network. However, there is still potential improvement to be achieved to fuse the redundant information, which can be intra-frame or inter-frame. In this article,...
Delay of signalized intersection has been estimated not only by manual method but also some intersection models. Long queues of lanes will make it difficult for collecting data manually and delay calculated by signalized intersection models may not be perfect for a particular intersection. In this paper, we design a system that can calculate delay automatically based on image processing technology...
The humanpsilas pulse wave signals show promising in home health monitoring. Many efforts have been made to promote sphygmogram-based cardiovascular diagnosis application. In this paper, a mobile intelligent sphygmogram analyzer is discussed, which attempts to extend the PC-attached cardiovascular prognosis system to ARM-based embedded platform and solves the conflict between the powerful functions...
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