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This paper presents the Netuno supercomputer, a large-scale cluster installed at Federal University of Rio de Janeiro in Brazil. A detailed performance evaluation of Netuno is presented, depicting its computational and I/O performance, as well as the results for two real-world applications. Since building a high- performance cluster for running a wide range of applications is a non-trivial task, some...
Bluetooth technology is more and more present in people lives. Cellphones, smartphone's, PDA's, MP3 devices, laptops, tablets and more recently vehicles, are some examples of devices where a Bluetooth interface is present. As these devices are always used or carried by persons, we can study patterns of human mobility by analyzing the electromagnetic signals produced by these devices, in this case...
This paper presents a description and the evaluation of the Netuno supercomputer, a high-performance cluster installed at Federal University of Rio de Janeiro in Brazil. The results for the High Performance Linpack (HPL) benchmark and two real applications are reported. Since building a high-performance cluster for running a wide range of applications is a non-trivial task, some lessons learned from...
Three terminal measurements on a carbon nanotube field effect transistor (CNTFET) were carried out in high vacuum and the ambient, and its performance compared. The on-off current ratio, ION/IOFF, were 102 and 105 for devices operated in high vacuum and in ambient air, respectively. Here, we show that the conversion of p-type to ambipolar behavior may largely be attributed to the O2 in ambient doping...
Modern distributed systems are built with numerous different computing platforms, which can be based on different hardware and operating systems. In this context, the development of multi-platform device drivers may contribute for a better scalability of dynamic distributed systems. A Java-based device driver for a controller area network card was implemented, and it is intended for utilization on...
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