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Despite of Cloud infrastructures can be used as High Performance Computing (HPC) platforms, many issues from virtualization overhead had kept them unrelated. However, with advent of container-based virtualizers, this scenario acquires new perspectives because this technique promises to decrease the virtualization overhead, achieving a near-native performance. In this work, we analyzed the performance...
Wireless networks have evolved considerably in the last decade and the world has seen an exponential increase in the number of mobile device users. The performance of the wireless networks has become a critical factor and researchers nowadays are trying to bring out even the slightest increase in network performance wherever possible. TCP, which is the most dominant transport protocol of the Internet,...
The further growth of billions of wirelessly connected devices requires a technology infrastructure that can handle a massive increase in storage, computing power and bandwidth, some of it available via cloud computing, to enable number crunching at very large scale and at high volume, low cost and low power. The IoT applications or ‘smart devices’ require the following technology enablers: ultra-low...
The further growth of billions of wirelessly connected devices requires a technology infrastructure that can handle a massive increase in storage, computing power and bandwidth, some of it available via cloud computing, to enable number crunching at very large scale and at high volume, low cost and low power. The IoT applications or ‘smart devices’ require the following technology enablers: ultra-low...
Presented is a novel half Gb DRAM device for 3D stacked systems utilizing TSV. It is designed through the use of a new computer-aided design methodology and which realizes 819 Gb/s bandwidth across 16 channels and <10ns read latency on a 45nm DRAM process. The architecture is based on small subarrays with short WL and BL to realize the low latency and energy efficiency. We also integrated several...
High-efficiency wavelength conversion based on the quasi-phase-matching technique is proposed and simulated in a slot waveguide. Benefit from the tight light confinement and the high nonlinear material (silicon nanocrystal) filled in the slot region, a large nonlinear coefficient is achieved. With the linear phase-mismatch alternately changing between two values of the opposite signs, periodical attenuation...
Ferrite isolators are indispensable in microwave system, such as inter stage isolation, preventing inter harassed, impedance matching and decoupling. Compared with traditional isolators which are made of circulators and its matching circuits, self-biased edge mode isolators have wide bandwidth inherently and small volume based on hexagonal ferrite materials.
Graphics processing units (GPUs) have delivered promising speedups in data-parallel applications. A discrete GPU resides on the PCIe interface and has traditionally required data to be moved from the host memory to the GPU memory via PCIe. In certain applications, the overhead of these data transfers between memory spaces can nullify any performance gains achieved from faster computation on the GPU...
We have been developing a proprietary interconnect technology called Tightly Coupled Accelerators (TCA) architecture to improve communication latency and bandwidth between compute nodes on a GPU cluster. This paper describes the Conjugate Gradient (CG) method implementation using TCA and results of performance evaluation on the HA-PACS/TCA system, which is a proof-of-concept GPU cluster based on the...
Analytics of network telemetry data helps address many important operational problems. Traditional Big Data approaches run into limitations even as they push scale boundaries for processing data further. One reason for this is the fact that in many cases, the bottleneck for analytics is not analytics processing itself but the generation and export of the data on which analytics depends. The amount...
The need for the development and use of a Network Management System (NMS) arises ipso facto that a typically huge network incorporates a huge number of interlinked network components for the transfer of data across channels making it essential to ensure the up keeping of such components for an uninterrupted communication. Such large scale deployment of components makes it tricky for an individual...
This paper deals with the performance evaluation of image segmentation. The goal of this work is to show some techniques that enable the comparison of different segmentation results. We first present a visualization method that facilitates the visual evaluation of a segmentation result. Next, we focus on unsupervised evaluation criteria that do not take into account any a priori knowledge to quantify...
Crowdsourcing-based video service systems, e.g., Thunder Crystal, are novel content distribution platforms composed by a large number of agent devices, acting like miniservers. Most agents are normal Internet users who would like to earn rewarded cash by uploading content through their devices. Compared with CDN, the bandwidth cost is much cheaper; while compared with Peer-to-Peer(P2P), the bandwidth...
The Wi-Fi technology has been fast growing and available on a huge number of electronic devices. Moreover, due to the easiness in deployment a Wi-Fi user is normally in the coverage of several surrounding Wi-Fi access points (APs). The Wi-Fi virtualization, which abstracts a Wi-Fi interface to appear as several virtual ones to the user, is one of the most significant current approaches in improving...
In this paper, we proposed a new disk scheduling algorithm for improving the performance of modern storage devices in terms of throughput. Since the invention of disk with movable heads, many researchers tried to improve the I/O performance by using intelligent algorithms for disk scheduling. Memory capacity and speed of the processor are increasing several times than the speed of disk. This disparity...
Modern research and education networks, such as ESnet and Internet2, offer the capability to increase the reliability and predictability of big data transfers through the reservation of bandwidth in the form of dynamic (on-demand) virtual circuits interconnecting pairs of geographically distant end sites. Because each end site utilizes a circuit in the same manner as a VLAN, the number of circuits...
Robust Header Compression (ROHC) is a standardized option defined by the IETF to compress the various transport and communication protocol headers over wireless links. In the present day scenario, when the applications and services are evolving to become more bandwidth hungry, wireless networks are expected to be capable of letting them drive on wireless links and provide required quality of service...
Machine-to-Machine (M2M) communications is considered to be one of the key enablers for the provisioning of advanced applications and services such as smart cities and hospitals, as well as automated vehicular and industrial automation operation. Currently, in LTE-Advanced systems, the main focus has been on supporting massive deployment of low cost devices, with enhanced radio access network coverage...
Conventional servers have achieved high performance by employing fast CPUs to run compute-intensive workloads, while making operating systems manage relatively slow I/O devices through memory accesses and interrupts. However, as the emerging workloads are becoming heavily data-intensive and the emerging devices (e.g., NVM storage, high-bandwidth NICs, and GPUs) come to enable low-latency and high-bandwidth...
The need for novel data analysis is urgent in the face of a data deluge from modern applications. Traditional approaches to data analysis incur significant data movement costs, moving data back and forth between the storage system and the processor. Emerging Active Flash devices enable processing on the flash, where the data already resides. An array of such Active Flash devices allows us to revisit...
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