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MapReduce greatly alleviates the burdens of programmers and gradually becomes an application programming standard on cloud computing nowadays, because the run-time system of cloud computing can automatically handle the issues of paralleled and distributed programming on behalf of programmers at run time. Although MapReduce can strongly benefit programmers on developing cloud computing applications,...
A kind of novel wearable health condition monitoring device based on ZigBee technology for electricity workers to improve the safety of working and training is presented, which can monitor the user's pulse wave and body temperature wirelessly. In this paper, the system architecture, details of the monitoring sensor nodes, hardware design of the ZigBee module and data packet structure definition of...
Recently the market of Android has shown an explosive development. Unfortunately the increasing popularity turns the Android platform into the main target of malware. At the same time, the limited security protection built-in Android makes the situation much worse. In this paper, we present a new framework named Defensor which takes the practicability and effectiveness into consideration. The core...
This paper presents an internationally interoperable marine meteorological information service implemented with the Automatic Identification System (AIS). The service is delivered with both the shore-side system and the shipboard application platform. It is targeted not only to providing services to AIS-fitted vessels but also to collecting weather reports from ships. The intended coverage area includes...
In this paper, an energy efficient data storage method for top-k query in wireless sensor networks is proposed. In the proposed method, the sensor network is divided into a number of grids and there is a grid head present at the center of each grid. Each grid head is assigned a definite sub-range of sensed data and the grid heads store only those sensed data within the assigned sub-range. Division...
We present OAM mode distortion monitoring by using an interferometer with π/2 phase-shift to reconstruct the phase profile without any movement of instruments. Monitoring of distortion caused by misalignment and atmospheric turbulence are successfully demonstrated.
At present, the rapid development of power supply has brought great challenges to the safe operation of the cable and the prevention of accidents in power transmission. However, using traditional manual methods to maintain the cable does not meet the current demand. Therefore, managing the operation of the cables via advanced computer technology is significant for the power transmission. In this paper,...
Kernel-level attacks can compromise the security of an operating system by tampering with key data and control flow in the kernel. Current approaches defend against these attacks by applying data integrity or control flow integrity control methods. However, they focus on only a certain aspect and cannot give a complete integrity monitoring solution. This paper tries our best to find out all resorts...
The 2D axisymmetric, real gas model was developed to calculate the ejector in the ejector cooling system. The calculation of the real gas model occupies more computer resources, but its result can be more authentic. The CFD model was validated with available experimental data. Predictions at the operating conditions in the ejector cooling system were discussed. The aim of the prediction is to obtain...
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