Dynamic resource provisioning for virtualized server applications is integral to the efficiency of computing paradigms such as green and cloud computing. In these environments unpredicted workload changes occur frequently and controlbased resource adaptation should respond to them in a timely fashion while minimizing the expected loss during workload transitions. Our approach is to minimize the...

─ A novel quarter-circle defected ground structure shape is introduced in this paper to design and implement an ultra-wide reject band low-pass filter (LPF). Moreover, an equivalent circuit model (ECM) is presented. The proposed LPF has small size and, a low insertion loss and a return loss less than -20 dB. Also, a round -20 dB suppression level ranging from 4 GHz to more than 20 GHz is achiev...

The recently discovered ‘‘longitudinal leaky’’ surface acoustic wave on YZ-cut lithium niobate has been used to implement low-loss bandpass filters operating in the 2.5-GHz Bluetooth frequency range. The filter is of the ladder type, employing synchronous resonators as building blocks. Resonator Q-values above 300 have been measured. The filter features a center frequency of 2491 MHz, a minimum...

The temperature dependence of a macrobending bare-fiber-based edge filter is investigated both theoretically and experimentally. The fiber used is a high-bend loss fiber, type 1060XP. The experimental results show a good agreement with the proposed theoretical model over a temperature range from 0 degrees C to 80 degrees C. It is shown that the strong temperature dependence of a high-bend loss ...

This paper proposes asymmetrical step-impedance resonators bandpass filters (ASIRs) for suppressing a wide stopband, ensuing in size reduction and ease of fabrication. The filters have been designed at the operating frequency around 2.0 GHz using halfand quarter-wavelength asymmetrical step-impedance resonators. The concept of existent oddand even-mode characteristics is used to approve the pro...

[1] We describe how assimilation of radiation belt data with a simple radial diffusion code can be used to identify and adjust for unknown physics in the model. We study the dropout and the following enhancement of relativistic electrons during a moderate storm on 25 October 2002. We introduce a technique that uses an ensemble Kalman filter and the probability distribution of the forecast ensem...

This paper is concerned with the quantized H∞ filtering problem for discrete-time systems subject to limited communication capacity, which includes measurement quantization and random sensor packet losses. By introducing an improved quantized random packet-loss model, the effects of the packet-loss rate and the upper bound of consecutive packet losses and the quantization on the system performa...

This article presents a new dog-bone defected ground structure (DGS) for low-pass filter (LPF) applications with widerejection band and low-insertion loss in the pass-band region. The prototype LPF consists of three dog-bone cells in the ground plane with an open stub on the top layer acting as a compensated capacitor. The prototype LPF is then realized as a multilayer structure to enhance the ...

This paper proposes parallel-coupled stepped impedance resonators (SIRs) used for wideband bandpass filters with reduced size and improved spurious response suppression in out-of-band. The filter design concept is demonstrated by both twoand four-parallel coupled line resonator structures with the same fundamental frequency (f0) of 6.5GHz. The first bandpass filter has been designed using two r...

This paper presents an analysis of wavelet filters and SPIHT encoding techniques adopted in compression and decompression of medical images. The hardware implementation for loss less compression with tradeoff in area, timing and power, requires quantizing of filter coefficients and identification of its impact on reconstruction process. This study proposes a novel algorithm that replaces multip...