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This paper presents the design of compact microstrip antenna. Using a novel idea of substrate perturbations, resonant frequency reduction of around 11% is successfully achieved. The design starts with the simple rectangular patch antenna resonating at 2.35 GHz, and successfully reduces the resonant frequency to 2.08 GHz, using substrate perturbations concept. The design is validated on the basis of...
Rolling element bearings are critical mechanical components in rotating machinery. Fault detection and diagnosis in the early stages of damage is necessary to prevent their malfunctioning and failure during operation. Vibration monitoring is the most widely used and cost-effective monitoring technique to detect, locate and distinguish faults in rolling element bearings. This paper presents an algorithm...
This paper reviews and discusses the effects of interconnection transformer configuration on distributed generator (DG) interconnection. Transformer is the key component of the interconnection of DG installation whenever a transformer is required. Further, proper grounding of the transformer and reliable coordination for protection and control are areas that need to be reviewed carefully and applied...
First order optimization methods, while being powerful and rapidly convergent, suffer from the fact that as the descriptive geometric parameters change from iteration to iteration, corresponding to these new geometries, new meshes need to be implemented. Correspondingly the new topologies of the meshes introduce non-physical jumps in the object function. These jumps are seen as physical minima by...
A publisher subscriber system is an event notification service where events generated by the publishers are routed to subscribers with matching subscriptions. Our work on publisher-subscriber systems in peer-to-peer (p2p) networks is motivated by the question : "What if the nodes in the network do not have the bandwidth to route all the events generated?" In such a case nodes may not receive...
This paper is concerned with the problem of synthesizing animating face driven by new audio sequence, which is not present in the previously recorded database. Future video frames and past video frames influence the dynamics of current video frame, so the dynamics of speech and facial expressions needed to be learned to model an efficient speech driven facial animation. We have incorporated the features...
A microstrip square patch antenna is designed and analyzed with re configurability in frequency and polarization. The patch contains two orthogonal slots and two rectangular patches added across the length and width. The diversity in frequency and polarization is achieved through the use of PIN diodes. The basic antenna is designed to operate at 4.5 GHz and, with re configurability in frequency, it...
This paper provides an architectural classification of smart classrooms and discusses the types of technologies used in their implementation. It examines the methodologies being used to make distance learning an exciting experience and as effective as the traditional classroom type education. Furthermore, the paper shows how commonly used smart classroom settings can be extended to a model where a...
Ferroresonance is a nonlinear oscillatory phenomenon, which occurs in capacitively coupled transformers under certain conditions in a power system. The magnetizing branch of the transformer at no-load is modeled by nonlinear equation. The coupling capacitances are treated as parameters and different numerical simulations of ferroresonance are performed. The power spectral density and phase plane analyses...
Wavelength division multiplexing (WDM) has emerged as the preferred technology for reducing the opto-electronic bandwidth mismatch by dividing the bandwidth of an optical fiber into multiple non-overlapping wavelength channels, each operating at peak electronic speed of the end users. Traffic grooming is being considered as a key functionality of WDM networks, in which, multiple low-speed traffic...
Recent developments in wireless communications and electronic devices has considerably contributed to the evolvement of low cost densely deployed sensor networks. Sensor network applications are diverse, ranging from civil to military. Many applications of wireless sensor network (WSN) are useful only when connected to an external network. In this paper we are proposing a low cost wireless sensor...
Analysis and reconstruction of ECG wave from sampled data is an important aspect in estimating the physiological condition of heart as well as in transmitting the ECG data to a remote location. In the present paper software based off line Fourier analysis technique has been reported to find the harmonic components of ECG wave of a normal subject. The respective Fourier harmonic data have been combined...
In most of the modern battery operated processor based real time embedded systems, hardware functionalities are realized with the help of dedicated software. Software used in such systems is responsible for processor energy consumption. Pure base cost, interinstruction cost and circuit state overheads are the basic components to analyze system with respect to current/energy consumption. In this paper,...
This paper presents a novel approach to handle the challenges of face recognition. In this work thermal face images are considered, which minimizes the affect of illumination changes and occlusion due to moustache, beards, adornments etc. The proposed approach registers the training and testing thermal face images in polar coordinate, which is capable to handle complicacies introduced by scaling and...
In this paper we present a novel method for digital audio steganography where encrypted covert data is embedded by adaptively modifying wavelet packet coefficients of host audio signal. The major contribution of the proposed scheme is the technique introduced for adaptively modifying the host audio to embed the covert data. The modification of host audio is done by imposing a constraint which forces...
This paper presents a description of the work done on phonetic speech analysis. The work aims in generating phonetic codes of the uttered speech in training-less, human independent manner. This work is guided by the working of ear in response to audio signals. The Devnagri script inspires the work presented. The Devnagari script classifies and arranges 46 phonemes in a scientific manner based on the...
An efficient architecture for implementation of double precision floating point multiplication on field programmable gate array (FPGA) is presented, based on the use of partial block multipliers. The proposed module gives excellent performance with efficient use of resources, achieving upto 292 MHz on a Xilinx Virtex II Pro device and 325 MHz on a Xilinx Virtex IV. The cost of the design is an error...
Scalability has become an important consideration in Network-on-Chip (NoC) designs. The word scalability has been widely used in the parallel processing community. For massively parallel computing, a scalable system has the property that performance will increase linearly with the system size. The scalability analysis may be used to select the best architecture for a problem under different constraints...
In aircraft electric motor driven fuel delivery system, the motor must be characterized by high power density, reliability, less size, less weight and high speed. The high speed operation, fault tolerance, high power density makes switched reluctance motor an ideal candidate for high speed aerospace applications. This paper investigates the application potential of soft magnetic composite material...
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