The present work introduces a hardware based technique for reduction of in-rush current in processors with power gating (PG) facility. A PG instruction has been introduced which is responsible in turning on multiple components from sleep to active mode at overlapped time intervals. The supporting hardware for the proposed PG instruction allows overlapped wake-up as long as the resultant in-rush current is tolerable by the system. The efficacy of the proposed method is evaluated on MiBench and...

This paper proposes the design of ZVS class E resonant inverter to be used in a wireless power transfer (WPT) system. Since the Class E inverter satisfies the zero voltage switching (ZVS) and zero derivative voltage switching (ZDS) condition, high conversion efficiency at high frequency can be achieved. All the components of the circuit are designed for optimum mode of operation and the inverter is made to operate at optimal switching conditions. The designed circuit is simulated in PSPICE e...

The objective of the present study was to prepare Si doped hydroxyapatite nanopowder incorporated photocurable aligate paste suitable for orthopaedic application. 0.4 wt% silicon substituted hydroxyapatite nanopowder with average particle size between 85- 90 nm was synthesized using wet chemical method. X- ray diffraction and FTIR analysis confirmed substitution of PO43– with SiO44- groups in prepared HAp nanopowder. On addition of Si into hydroxyapatite lattice, crystallite size of the prepa...

The objective of human action recognition is the interpretation of ongoing events and context from video data for automated systems. In this paper, motion history image (MHI) is used as the region of interest (ROI) of action during the training phase to recognize human actions effectively. Therefore, the extracted spatio-temporal interest points (STIPs), that are used to train the classifier model, are free from noisy interest points due to the clutter background and illumination changes. Af...

Hand gesture recognition system is widely used in the development of human-computer interaction. The vision based hand gesture recognition is achieved by the following steps: preprocessing, feature extraction and classification. The aim of preprocessing stage is to localize the hand region from the image frame. The Laplacian of Gaussian filtering technique along with zero crossing detector is applied on hand gesture images to detect the edges of hand region. This paper proposes a novel featu...

Titanium is one of the fastest growing materials used in aerospace applications due to light weight. Most production processes like machining and forging generate large amount of titanium and titanium alloy scrap in the form of chips. From the economic, strategic and environmental point of view, these scrap should be reused and recycled. Powder metallurgy provides a very suitable and economical way for the utilization of waste titanium scraps. In the present investigation, an attempt has been...

In this paper, we investigate the outage performance of a cooperative and cognitive radio system where two secondary users (SUs) communicate through a relay via the two-way relaying. The coexistence of SUs with the primary users (PUs) in the same spectrum is possible by using underlay protocol, where the interference at the PU receiver is under a predefined threshold. Focusing on the cooperation process among the SU nodes and making use of the underlay cognitive approach, we derive the exact ...

The mining industry is the backbone of various manufacturing and infrastructure industries. In order to maintain a safe working environment, a lot of parameters need to be monitored periodically in underground mines. Wired indicators in underground mines incur a lot of regular maintenance. In wired network, if the wire gets broken then data from multiple sensors may get damaged. In wireless communication, the environment of a certain area can be analyzed at a distance. This paper proposes a p...

Attempt was made to prepare the biogenic catalyst from waste biomass with the support of chromium and copper metals. Metal modified silica catalysts were prepared by incorporating the metals like chromium and copper into silica matrix. In the present work the rice husk samples were pre-treated with different acids and then the samples were subjected to pyrolysis under controlled burning conditions. Pyrolysis operation was carried out at different temperatures in a furnace to get maximum rice ...

Fibre reinforced polymeric (FRP) are used in different components of aerospace, space, marine, automobile and civil infrastructure. These materials are becoming prime choice of materials in the field of structural components. During their in-service period different structural components experience a wide range of loadings. The current investigation was focused on the assessment of mechanical and thermal behavior of glass FRP composite on the addition of nano-TiO2 particles. The control glass...

Longitudinal creep behavior of nanocomposite for NC Ni-NiZr glass has been studied at various temperatures (from 1200 to 1400 K) at 1 GPa stress using MD simulations. A simulation box of the specimen 15.85 × 15.85 × 15.85 nm dimension (contains 312,924 atoms) is taken for performing MD simulation. Common neighbor analysis (CNA), Centro-symmetry parameter (CSP) analysis, Wigner–Seitz defect analysis and radial distribution function (RDF) have been carried out to investigate the structural evol...

An axisymmetric dome of 70 mm in diameter and 35 mm in depth was formed using the ISF process using varying proportions (25, 50 and 75%) of spiral (S) and helical (H) tool path combinations as a single tool path strategy, on a 2 mm thickness commercially pure aluminium sheets. A maximum forming depth of ~30 mm was observed on all the components, irrespective of the different tool path combinations employed. None of the components were fractured for the different tool path combinations used. T...

In airborne systems, where low aerodynamic drag is urgently required, an end-fire antenna is suitable to be used. Traffic alert and Collision Avoidance System (TCAS) is an airborne electronic system that is designed as the last defense equipment for avoiding mid-air collisions of two aircraft. An effort to develop such an antenna, using microstrip elements, is described in this paper. Here, a Dual Patch Dual Feed Microstrip Antenna is presented which radiates in the endfire direction. Thereaf...

Purkayastha and Char (1977) conducted a theoretical analysis for the bearing capacity of eccentrically loaded shallow strip foundation supported by sand and proposed a relationship for a reduction factor (Rk). The reduction factor is the ratio of the bearing capacity with eccentric loading to that with centric loading at the same embedment ratio (Df /B). The reduction factor was a function of Df /B and e/B (e = load eccentricity). It was not a function of the soil friction angle. The present ...

A relatively new technique to solve the optimal power flow (OPF) problem inspired by the animal migration represented as Animal Migration Optimization(AMO) is presented in this paper. The generators active power, the generators voltage, tap settings of the transformers, and capacitive shunt VAR compensating devices, define the search space for the OPF problem. IEEE 57 bus test systems are assessed for various objectives to determine Animal Migration Optimization(AMO) efficiency in handling t...

This proposed work introduces a novel technique for Fast Content-Based Image Retrieval (CBIR) using Dual-Cross Patterns (DCP). DCP encodes second order information in the vertical, horizontal and diagonal direction, by performing the encoding of sample points in the local surrounding region of every center pixel in an image. The local binary pattern (LBP), an efficient visual texture descriptor, performs a comparison between the center pixel and its neighboring pixel. Local tetra patterns ...

Face recognition results are degraded when the test image is having nonuniform illumination variations. Due to the lighting variations, different expressions and occlusions the facial appearance of the face changes dramatically such that recognition by the methods is quite a difficult task. Out of which the problems due to illumination variations such as shadows, under lighting, over lighting in the face are the crucial problems which are to be overcome to achieve the satisfactory results for...

Occlusion, glare and secondary reflections formed due to and on the spectacles - results in poor detection, localization, and recognition of eye/face features. We term all the problems related to the usage of spectacles as The spectacle problem. Though several studies on the spectacle detection and removal have been reported in the literature, the study focusing on spectacle problem removal is very limited. One of the main reasons being, the nonavailability of a facial image database highligh...

Biomass derived fuels have a potential to replace fossil fuels that are used in transportation. Orange oil is considered as one of the possible alternative biofuels for compression ignition (CI) engines, as it is renewable and available in a significant quantity throughout the world. It is a biomass derived fuel obtained from orange skin, which has 90% D-limonene. In this study an orange oil diesel blend is used as a test fuel in a single cylinder, four stroke, direct injection (DI) diesel en...