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A millimeter-wave fully differential power amplifier with broadband performance was implemented in 90-nm CMOS technology. The proposed circuit employed a three-dimensional layout for a cascode power cell to reduce the sensitive parasitic effect. The proposed power amplifier provides a 3-dB bandwidth region ranging from 44.7 to 58.8 GHz, with a maximum small-signal gain of 21.6 dB at 49 GHz. In addition,...
The individual blocks of broadband up-conversion mixer and frequency tripler for 60 GHz up-converter in 90 nm CMOS technology are demonstrated. Utilized the active balun and RC-feedback topology, the up-conversion double-balance mixer can operate with single-ended IF input signal. The inductive peaking technique is also used in proposed mixer to improve the IF bandwidth. Furthermore, the Gm-boosted...
MapReduce has been widely adopted as a programming model to process big data. However, parallel jobs in MapReduce are prone to be plagued by stragglers caused by non-local tasks for two reasons: first, system logs from production clusters show that a non-local task can be two times slower than a local task, second, a job's completion time is bottlenecked by its slowest parallel tasks. As a result,...
ExoGENI is a new GENI-federated Infrastructureas- a-Service (IaaS) framework. In this paper, we evaluate the performance of data-intensive applications on ExoGENI's resources. To simplify experiments, we design an automatic provisioning system called ExoApp. This paper focuses on MapReduce-based applications. Users can easily deploy applications in ExoGENI using ExoApp, without having to manually...
Data centers are increasingly being re-designed for workload consolidation in order to reap the benefits of better resource utilization, power savings, and physical space savings. Among the forces driving savings are server and storage virtualization technologies. As more consolidated workloads are concentrated on physical machines -- e.g., the virtual density is already very high in virtual desktop...
As Internet sustains high-speed development, its service quality, reliability and efficiency are taken into account once again. Some solutions are proposed. Network measurement technology can reflects operation condition of IP network and discover network abnormity in time which provides reference for orientation and discovery of network fault. Firstly, interval algorithm of packet pair and packet...
Scaling computations on emerging massive-core supercomputers is a daunting task, which coupled with the significantly lagging system I/O capabilities exacerbates applications' end-to-end performance. The I/O bottleneck often negates potential performance benefits of assigning additional compute cores to an application. In this paper, we address this issue via a novel functional partitioning (FP) runtime...
A compact 1:4 parallel phase shift power divider that provides equal power split to all four output ports and 900 phase difference from port 3/4 to port 2/5 over a large bandwidth is presented, which comprises two composite right/left handed(CRLH) transmission lines(TLs) in transformer, two CRLH TLs in output port 3 and port 4. The proposed CRLH power divider provides wide impedance bandwidth of 76%...
Speed and precision are important for object detection algorithms. In this paper, a novel object detection algorithm based on color histogram and adaptive bandwidth mean shift is proposed. The algorithm is capable of detecting objects rapidly and precisely. It is composed of two stages: a rough detection stage and a precise detection stage. At the rough detection stage, histogram back projection and...
With the evolvement of grid applications, the need for user controlled network infrastructure is apparent in order to support emerging dynamic and interactive services. In this paper, a novel fast light-path set-up protocol, named forward reserve backward release protocol, is proposed to meet these requirements. The proposed protocol addresses the signaling over head for dynamic wavelength networks...
Identifying anomaly detection such as failure and attacks rapidly and accurately over the Internet holds interest of both network operators and researchers. Network behavior analysis (NBA) system is usually disposed over an intranet, passively collects SNMP data or flow data, and uses signature and anomaly mechanisms to identify and analyze interesting network activities, including traffic anomaly...
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