For deep tissue photoacoustic imaging, piezoelectric ultrasound detectors with large element sizes (>1mm) and relatively low centre frequencies (<5MHz) are generally used, as they can provide the required high sensitivity to achieve imaging depths of several centimetres. However, these detectors are generally not optimised in terms of element size and bandwidth. To identify these parameters in ...

Through intensive study, it has been explored that multipleinput single-output (MISO) antenna systems have the potential to dramatically improve the performance of communication systems over single antenna systems. With the idea of implementing WiMAX MISO Communication Technology for overcoming the challenges offered by hostile channel and environmental effects, it leads the Technocrats to util...

Stochastic Resonance in a coupled FitzHugh-Nagumo equation is investigated. The optimal noise intensity and the optimal input frequency, which maximize the signal to noise ratio of the output signal, are studied numerically, and their dependence on system parameters and connection coe cients is examined. It is found that a network composed of six elements can separate a superimposed periodic pu...

This paper describes a method for blind estimation of sharpness and resolving power from a single image. These measures can be used to characterize images in the context of the performance of image analysis procedures. The method assumes the point spread function (PSF) can be approximated by an anisotropic Gaussian. The width of the PSF is determined by the ratio of the standard deviations of t...

Correspondence analysis is required for many applications such as multimedia communication and 3-D tele-presence. Current intensity-based approaches model intensity differences of corresponding points in the leftand right-eye images with Gaussian distribution. In this contribution, the statistical characteristics of intensity differences of corresponding points were studied using natural stereo...

avoid interference from secondary users to primary holders with license in spectrum, it is need to have an appropriate spectrum sensing. In methods like spectrum sensing, where samples of noise are correlated, the impairments from independent noise samples do not provide optimum performances. So, in case of random signals over a weakly correlated noise model in fading channels requires a locall...

In this letter, we propose a novel precoding scheme for base station (BS) cooperation in downlink cellular networks that allow overlapped clusters. The proposed precoding scheme is designed to mitigate the overlapping-BS interference by maximizing the so-called clustered virtual signal-to-interferenceplus-noise ratio (SINR). Simulations show that with the proposed scheme, overlapped clustering ...

In this paper, we propose an analytical model for 802.11 ad hoc wireless networks. Our model consists in replacing a finite number of nodes by an equivalent continuum characterized by a density of nodes and disseminated in the network according to some distribution function. The key feature of the proposed model is that it permits taking into account the effect of interference, the CSMA/CA mech...

There are several softwares which have their normative values like MDVP, Dr Speech, and Vaghmi. The present study aims to establish a normative data for PRAAT software in the age range of 5-10 yrs. for Indian population. Two hundred and fifty children (between the age ranges of 5-10 years) participated in the study. Voice samples were elicited by asking each participant to produce sustained pho...

We describe a new model of CASA labelling which assigns to each time-frequency region a probability "clean" enough to feed a multistream recogniser only adapted to clean data. This labelling process is based on the harmonicity of the speech. The probability is evaluated according to a SNR-feature mapping and the choice of a SNR decision threshold. This allows an extension of a previous method [...