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Evaluating the performance of database systems is crucial when database vendors or researchers are developing new technologies. But such evaluation tasks rely heavily on actual data and query workloads that are often unavailable to researchers due to privacy restrictions. To overcome this barrier, we propose a framework for the release of a synthetic database which accurately models selected performance...
Magnetic sensor chip for measuring biomagnetism is implemented in 0.18µm CMOS technology. The magnetic sensor chip consists of a small-sized high inductance coil sensor and an instrumentation amplifier (IA). The embedded high-inductance coil sensor contains suitable sensitivity and bandwidth for biomagnetic measurements, and is designed via electromagnetic field simulation. A low-gm operational transconductance...
This paper investigates the performance of DC-DC PWM based buck-boost converter with two degree-of-freedom (2 DOF) control to meet the loop robustness goals as well as to shape the output voltage response according to requirement. The design technique of this controller is simpler than that of the robust control techniques, such as H∞, control, μ-synthesis, applied in literature for converters. Moreover,...
In this paper, we present an automatic method for determining time-location of systolic peak in arterial blood pressure (ABP) signals. The method consists of four major steps: Gaussian derivative filtering, nonlinear peak amplification, Gaussian derivative based peak finding scheme, and peak position adjustment procedure. The method is tested and validated using the standard MIT-BIR Polysomnographic...
The continuous increase of demand for radios navigators makes the use of Automatic Test Equipments compulsory, in order to reduce the testing time and cost. The Telemakos is an Italian test equipment specifically designed to check radio navigator sensitivities. The paper reports the electromagnetic compatibility analysis carried out to meet the noise specifications. The Telemakos test bench is a very...
Repeatability of resonance detection for on-chip microring resonators is systematically studied. An efficient interferometric method is presented to improve the accuracy by more than one order of magnitude in an 8 nm bandwidth, without any temperature control.
We report the work of exploring atom interferometry techniques to perform precision gravity measurements in our laboratory. The noise suppressions and related modulation experiments for the atom gravimeter will be presented in detail.
Expeditiously escalating need for the wireless communication puts forward the challenge of efficient spectrum utilization. The cognitive networks paradigm gives a tremendous provision to considerably influence and shift the implementation of underwater acoustic networks for an efficient utilization of acoustic spectrum. The capacity of underwater acoustic communication is intrinsically constrained...
We present the quantum noise limited sensitivity curves for the LIGO interferometer incorporating the white light cavity, which shows broadening effect and dips of opto-mechanical resonances for different values of reflectivities of the auxiliary mirror.
We present an ultrasensitive cavity-enhanced technique for probing weak molecular absorptions. Recently, we have implemented heterodyne detection, which allowed for quantum-noise-limited detection and noise-equivalent absorption coefficients as low as 6×10−14 cm−1·Hz−1/2.
The quantum nature of light imposes a fundamental limit on the sensitivity of ground based gravitational wave detectors. Squeezed states of light, produced via parametric downconversion in a non linear medium, have recently been employed to beat the quantum limit and extend the astrophysical reach of the most sensitive gravitational wave detector ever built.
This paper presents an RF system-level design of a Spectrum Sensing Direct Conversion Receiver for Cognitive Radios. An extension to the recently developed IEEE 802.22 standard from 54MHz to 4GHz is proposed to take advantage of additional underused frequency bands. The proposed architecture is designed to detect IEEE 802.22, IEEE 802.16, and LTE signals as incumbents. The receiver is composed of...
Harmonic radar architectures present systems of wireless detection operating at multiple harmonic carrier frequencies. The noise and sensitivity of a harmonic radar system, which is developed at 12 GHz and 24 GHz for vital signs detection, are studied numerically and experimentally. The received signal power of the radar system is analyzed numerically as a function of the distance, taking into account...
In this paper we introduce a new framework called Med Cat to delineate and demonstrate an approach for projecting representations of concept-derived content in clinical notes into a new categorization space to reduce dimensionality and noise in the data. Constructing Med Cat framework required several steps including manual annotation, knowledge base expansion using MetaMap, concept category construction,...
The tumor proliferation pathways for each individual patient encompass variations and a successful treatment regime based on targeted drugs necessitates the estimation of the influences of target inhibition on cell viability. In this article, we consider an inference approach to decipher the significant blocks of protein targets and the effect of their inhibition on tumor proliferation. Our framework...
In this paper, a novel Hessenberg-based input balanced realization for all-pass systems is derived. The expression of roundoff noise gain for this structure is obtained. An Nth order system implemented with a coupled all-pass sub-filters proposed in [18], in which each all-pass filter is realized using our proposed structure, yields a roundoff noise gain of N + 1, smaller than that of the classical...
A novel silicon nanowire (SiNW)/CMOS hybrid biosensor was produced for the first time. The hybrid biosensor features a complementary SiNW block and CMOS logic inverter readout circuitry. The proposed hybrid biosensor shows remarkably sensitive output voltage (Δ1.2 V/Δ0.4 pH and Δ1.2 V/Δ200 fM DNA) without noise or fluctuations.
A classification of arrhythmia is first to detect the heart beats and classify its their types. However, the missing heart beats and mistaken heart beats must be existed when heart beats are detected. If these false heart beats were mixed in the normal sinus rhythm (NSR) beats and the irregular sinus rhythm (ISR) beats, how to classify these false heart beats is a challenge. In this study, we propose...
Spectral reflectance represents physical information of an object surface. In a conventional colour management system the spectral reflectance will be converted to the common space which will describe object tristimulus value or how will that particular colour will look under some of the standard illuminants or real light sources. However, many applications will require the object reflection to be...
This paper presents a generic design methodology of fixed order robust H2 controller and onboard computer for Micro air Vehicles. The efficacy of the proposed method is demonstrated by designing a fixed order robust H2 stability augmentation system for longitudinal dynamics of a Micro air Vehicle, named Sarika-1. Strengthened discrete optimal projection equations, which approximate the first order...
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