Unlike traditional cluster systems, the Cloud Computing paradigm provides access to an execution environment without upfront investments in hardware and facilities. Due to the elasticity and the pay-per-use billing mo...
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ISBN:
(纸本)9781509060580
Unlike traditional cluster systems, the Cloud Computing paradigm provides access to an execution environment without upfront investments in hardware and facilities. Due to the elasticity and the pay-per-use billing model, it is possible to configure experimental environments with minimal idle costs. In this paper, we perform an extensive evaluation of the major commercial public clouds. Our results show that performance degradation due to virtualization and other cloud overheads is insignificant. However, the network interconnection in the cloud still remains a large bottleneck for HPC application performance.
We demonstrate a 40-Gbit/s receiver using semiconductor optical amplifier and discuss the advantage over the avalanche photodiode receiver. Measured minimum sensitivity was -21.3 dBm, which is the highest ever reporte...
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ISBN:
(纸本)1557527318
We demonstrate a 40-Gbit/s receiver using semiconductor optical amplifier and discuss the advantage over the avalanche photodiode receiver. Measured minimum sensitivity was -21.3 dBm, which is the highest ever reported without fiber amplifiers.
Future wireless communication systems are expected to support a wide range of services which will include video, data and voice. To achieve the necessary capacity for these systems, the use of adaptive antennas has be...
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Future wireless communication systems are expected to support a wide range of services which will include video, data and voice. To achieve the necessary capacity for these systems, the use of adaptive antennas has been proposed at the base station. Further increases in capacity may be possible by including adaptive antennas at both the base and mobile stations in the up and down links. In this paper, we investigate the performance of such a system.
In order to release the growing demand for computational complexity with respect to increasing information sequence length in the priority-first search decoding algorithm, a path elimination modification is proposed a...
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Images captured under hazy conditions have low contrast and poor color. This is primarily due to air-light which degrades image quality according to the transmission map. The approach to enhance these hazy images we i...
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ISBN:
(纸本)9781479903573
Images captured under hazy conditions have low contrast and poor color. This is primarily due to air-light which degrades image quality according to the transmission map. The approach to enhance these hazy images we introduce here is based on the 'Dark-Channel Prior' method with image refinement by the 'Weighted Least Square' based edge-preserving smoothing. Local contrast is further enhanced by multi-scale tone manipulation. The proposed method improves the contrast, color and detail for the entire image domain effectively. In the experiment, we compare the proposed method with conventional methods to validate performance.
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