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With the advent of big data era, clients lack of computational and storage resources tends to outsource data mining tasks to cloud computing providers in order to improve efficiency and save costs. Generally, different clients choose different cloud companies for the sake of security, business cooperation, location, and so on. However, due to the rise of privacy leakage issues, the data contributed...
New Vacuum Solar Telescope (NVST) possesses a world-class solar telescope which observes the sun by high resolution image instruments and multi-wave spectrometer in visible and near infrared bands. NVST has gathered millions of Flexible Image Transport System (FITS) files since it has been for the routine observation and thousands of files are generated in a day. To search efficiently for a subset...
A quasi-experiment was conducted in this research to investigate the feasibility of using Alice in teaching high school students programming concepts. The subjects were 166 10th-grade students from four intact classes. Alice was taught to two randomly selected classes, and the other two classes were taught C++, both for 8 weeks. The programming constructs students learned included variables, arithmetic...
This study proposes a multi-infusion timing controller with user friendly interface for loose leaf tea brewing service. The proposed timing controller uses AT89S51 programmable microcontroller to detect the input signals and trigger the corresponding outputs. The input signals come from a power switch for turning the controller on/off, three push buttons for setting the brewing time, and two other...
This paper proposes a student-oriented class-course timetabling model to make good use of student time, save college budgets, and share departmental resources effectively. To achieve these goals, the study proposes a heuristic driven process coupled with two fitness functions to satisfy students' needs for taking or retaking certain courses without delaying their graduation; the proposed method balances...
Delay-tolerant networks (DTNs) have the capacity to interconnect the devices in roomy regions unlike todaypsilas networks. In this paper, we propose a routing scheme named time interval routing (TIR) to increase deliver ratio and decrease deliver latency in DTNs. TIR, only using limited and local information as well as simple algorithm, chooses the node in transmission range with the least time interval...
Signals output from the gyros usually contain turbulent noise, which comes down the signal accuracy and lowers the systemspsila function. So denoising is necessary. an algorithm, based on three-layer wavelet packet transform of semisoft threshold, was applied to process the gyropsilas state signal. The decomposition coefficient of each node was got from the decomposition of third-layer wavelet packet...
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