Synthesis and electrical conductance behavior of terpolymer resin-II derived from p-hydroxybenzaldehyde, urea and ethylene glycol
Publication date: Available online 23 April 2016 Source:Perspectives in Science Author(s): Amit N. Gupta Terpolymer resin abbreviated as HBUE-II was synthesized by polycondensation using monomers p-hydroxybenzaldehyde (0.2M), urea (0.1M) and ethylene glycol (0.4M) in the presence of polyphosphoric acid as catalyst at 120°C. The terpolymer was characterized by elemental analysis, FT-IR, 1H NMR and UV-Visible spectra. The resin was found to show semiconducting behavior in the temperature range 301-448K. The activation energy by conduction was found to be 1.1163kJmol−1. (Source: Perspectives in Science)
Source: Perspectives in Science - April 23, 2016 Category: Science Source Type: research
Corrosion behaviour of TiB2 Reinforced Aluminium based In-situ Metal Matrix Composites
Publication date: Available online 23 April 2016 Source:Perspectives in Science Author(s): G.S. Pradeep Kumar, R. Keshavamurthy, Prachi Kumari, Chirag Dubey This paper focuses on corrosion characteristics of cast and forged Aluminium 6061 based composites reinforced with TiB2 particles. Composites were synthesized by in-situ technique using Potassium Hexafluorotitanate salt (K2TiF6) and Potassium Tetrafluroborate (KBF4) halide salts by stir casting route at a temperature of 850°C. Cast Aluminum alloy and its in-situ composites were subjected to open die drop forging at a temperature of 500°C. Both cast and f...
Source: Perspectives in Science - April 23, 2016 Category: Science Source Type: research
A Novel method for Calculating Half Velocity Widths for Turbulent Jets
Publication date: Available online 23 April 2016 Source:Perspectives in Science Author(s): B.T. Kannan Conventional method of defining half velocity widths is applicable only for axisymmetric jets. Hence, geometry based definition of half velocity width is used for non-circular jets. Usefulness of this method becomes less when there is no symmetry based on geometry. Hence, a new half velocity width is proposed based on equivalent area method. Newly proposed half velocity width is computed for a conventional circular jet and a non-circular jet. The comparison of half velocity widths obtained using conventional method ...
Source: Perspectives in Science - April 23, 2016 Category: Science Source Type: research
A mathematical modelling of imbibition phenomenon in inclined homogenous porous media during oil recovery process
Publication date: Available online 23 April 2016 Source:Perspectives in Science Author(s): Shreekant Pathak, Twinkle Singh The approximate solution of imbibition phenomenon governed by non-linear partial differential equation is discussed in the present paper. Primary oil recovery process due to natural soil pressure, but in the secondary oil recovery process water flooding plays an important role. When water is injected in the injection well for recovering the reaming oil after primary oil recovery process, it comes to contact with the native oil and at that time the imbibition phenomenon occurs due to different v...
Source: Perspectives in Science - April 23, 2016 Category: Science Source Type: research
Performance evaluation of GLCM and Pixel intensity Matrix for Skin Texture analysis
Publication date: Available online 23 April 2016 Source:Perspectives in Science Author(s): Punal. M. Arabi, Gayatri Joshi, N Vamsha Deepa Texture refers to visual patterns or spatial arrangement of pixels. Texture analysis is one of the features in image processing that is used to analyze the images captured by the imaging devices on human skin. Skin texture analysis plays a vital role in assessing the skin health and to diagnosis of skin disorders like Allergic Skin Disorders, Viral Skin Disease, Bacterial Skin Diseases and Fungal Skin Diseases. Texture analysis is carried out by one of the methods namely, Struc...
Source: Perspectives in Science - April 23, 2016 Category: Science Source Type: research
Effects of Combined Gate and Ohmic Recess on GaN HEMTs
Publication date: Available online 23 April 2016 Source:Perspectives in Science Author(s): Sunil Kumar, Vimal Kumar Agrawal AlGaN/GaN, because of their superior material properties are most suitable semiconductor material for High Electron Mobility Transistors (HEMTs). In this work we investigated the hidden physics behind these materials and studied the effect of recess technology in AlGaN/GaN HEMTs. The device under investigation is simulated for different recess depth using Silvaco-Atlas TCAD. Recess technology improves the performance of AlGaN/GaN HEMTs. We considered three kind of recess technology gate, ohmic...
Source: Perspectives in Science - April 23, 2016 Category: Science Source Type: research
Study on effect of Microbial Induced Calcite Precipitates on strength of fine grained soils
This study intents to experimentally analyse the effectiveness of use of an unorthodox liquid soil stabilizer, Microbial Induced Calcite Precipitates (MICP) for improving the shear strength parameters of two different types of fine grained soils. For this process, a species of Bacillus group, B. pastuerii was used to activate and catalyse the calcite precipitation caused by reaction between urea and calcium chloride. Two types of soils, i.e. intermediate compressible clay and highly compressible clay were used for the study. Parameters included concentration of B. pasteurii, concentration of the cementation reagent and dur...
Source: Perspectives in Science - April 23, 2016 Category: Science Source Type: research
Experimental Evidences of Methanolic Extraction of Cressa Cretica Linn on Alloxan Induced Hyperglycemic Wistar Rats
Publication date: Available online 24 April 2016 Source:Perspectives in Science Author(s): B. Lalitha kumari, K.P.N.V. Satya sree, S.M. Roy Choudri, P Naga Ajay Babu In the present study, the physico-metabolic parameters measured were: serum insulin, serum lipid profile, serum biomarker enzymes and anti-oxidant enzymes, total cholesterol, HDLcholesterol, triglycerides, LDLcholesterol, VLDLcholesterol, total proteins, alanine transaminase (ALT), aspartate transaminase (AST), creatinine, insulin assay (RIA), for in-vivo anti-oxidant activity of MECC was measured in liver tissue homogenate (LTH) by malondialdehyde...
Source: Perspectives in Science - April 23, 2016 Category: Science Source Type: research
A Comparison Study for Control And Stabilisation of Inverted Pendulum on Inclined Surface (IPIS) Using PID And Fuzzy Controllers
Publication date: Available online 24 April 2016 Source:Perspectives in Science Author(s): Ashwani Kharola, Pravin Patil, Suyashi Raiwani, Deepak Rajput Inverted Pendulum on cart belongs to a class of highly non-linear, multivariable and complex system which is currently a keen area of interest for researchers in the field of control engineering and robotics. This paper considers stabilisation and control of Inverted Pendulum on cart moving on an inclined surface. The task of controlling inverted pendulum on inclined surface is much difficult as compared to that moving on horizontal surface. An offline control ...
Source: Perspectives in Science - April 23, 2016 Category: Science Source Type: research
Modal Behaviour Of Rotor Considering Rotary Inertia And Shear Effects
Publication date: Available online 20 April 2016 Source:Perspectives in Science Author(s): Rohit Tamrakar, N.D. Mittal The effect of Rotary Inertia and Shear effect becomes an important aspect for heavy rotors. The Euler-Bernoulli beam element is used for approximation in case of slender rotors and it is necessary for heavy rotors to consider Rotary Inertia and Shear effect. These effects tend to change the mass and stiffness matrix of shaft element. This paper presents the comparison of modal behaviour using Rayleigh beam element which includes rotary inertia effect, Timoshenko beam element which includes both rot...
Source: Perspectives in Science - April 20, 2016 Category: Science Source Type: research
“Synthesis and Evaluation of Ageing Effect on Cu-Al-Be-MnQuaternary Shape Memory Alloys”
The objective is to study the effect of thermal ageing at different temperaturesAf(above austenitic phase finish temperature) and at different time on Shape Memory Effect and transformation temperatures. The aged specimens or SMA's were studied by DSC, OM and hardness measurements.The results from this study helps to find the applications in different thermal conditions. (Source: Perspectives in Science)
Source: Perspectives in Science - April 20, 2016 Category: Science Source Type: research
Computational Neural Network Regression Model for Host based Intrusion Detection System
Publication date: Available online 20 April 2016 Source:Perspectives in Science Author(s): Sunil Kumar Gautam, Hari Om In current scenario of information gathering and storing in secure system is challenging task due to increasing of cyber-attacks. There exists several computational neural network techniques designed for Intrusion Detection System which provide security to single machine and entire network's machine. In this paper, we have used two types of computational neural network models namely, Generalized Regression Neural Network (GRNN) model and Multilayer Perceptron Neural Network (MPNN) model for Host ba...
Source: Perspectives in Science - April 20, 2016 Category: Science Source Type: research
Outage Probability Analysis of a Secondary User in an Underlay Dual Hop Cognitive Amplify-and-Forward Relay Network
Publication date: Available online 20 April 2016 Source:Perspectives in Science Author(s): Kiran Chandra, Soumen Mondal, Sanjay Dhar, Sumit Kundu This paper presents the performance evaluation of a secondary user (SU) in an underlay cognitive dual-hop relaying system considering instantaneous as well as average channel information of the interfering links (from the secondary source and relay to the primary receiver) and the data link from the secondary source to relay, to calculate transmit power and amplifying gain of secondary system. Comparison of above mentioned cases is done for two different scenarios-wit...
Source: Perspectives in Science - April 20, 2016 Category: Science Source Type: research
Investigation of microstructure and mechanical properties of Mg-Zn/Al multilayered composite developed by accumulative roll bonding
Publication date: Available online 20 April 2016 Source:Perspectives in Science Author(s): Gajanan Anne, M.R. Ramesh, H Shivananda Nayaka, Shashi Bhushan Arya The present study aims at development of light weight, high strength Mg-2%Zn/Al and Mg-2%Zn/anodized Al based multilayered composite by the accumulative roll bonding (ARB) process. The ultrafine grained multilayer composite was successfully roll bonded by using binary Mg-2%Zn alloy, pure aluminium and anodized aluminium at 300∘C with 50% reduction upto 5 passes. Multilayered composites are characterized with respect to microstructure, mechanical propert...
Source: Perspectives in Science - April 20, 2016 Category: Science Source Type: research
Diagnosis of Airgap Eccentricity Fault in the Inverter Driven Induction Motor Drives by Transformative Techniques
Publication date: Available online 20 April 2016 Source:Perspectives in Science Author(s): Khadim Moin Siddiqui, Kuldeep Sahay, V.K. Giri, Narendra Gothwal In the present paper, the airgap eccentricity fault of the induction motor has been diagnosed by digital signal processing transformative techniques in the inverter driven induction motor drives. The airgap eccentricity fault has been diagnosed in the transient condition by time domain as well as time-frequency domain techniques with the help of a proposed dynamic simulation model. In the past, many signal processing techniques had been used for various indu...
Source: Perspectives in Science - April 20, 2016 Category: Science Source Type: research
