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11 Articles Found

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Amartya Acharya1*, Sanjib Bhattacharya2, Chandan Kumar Ghosh3, Koyel Bhattacharya4

ELECTRICAL TRANSPORT OF LI+ ION CONDUCTING GLASSY NANOCOMPOSITES

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This review paper presents a comparative study in structural and electrical properties of some Li2O doped glassy nanocomposites that are being studied in recent time. It gives information about the preparation process, various structural and electrical analysis processes and also discusses the outputs received. Both the chemistry and physics of the samples under study is discussed briefly. The overall motion of Li+ ions has been inferred and so has the dimensionality

Anil Chamuah1*, Sanjib Bhattacharya2, Chandan Kumar Ghosh3, Koyel Bhattacharya4

A REVIEW ON RECENT DEVELOPMENT IN CHALCOGENIDE GLASSES: STRUCTURAL AND ELECTRICAL PROPERTIES

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This review paper presents a comparative study in structural and electrical properties of some of the chalcogenide glasses that are being studied in recent time. Its gives information about the preparation process, various structural and electrical analysis processes and also discusses the outputs received. Both the chemistry and physics of the samples under study is discussed briefly.

Aditi Sengupta1*, Sanjib Bhattacharya2, Amartya Acharya3, Chandan Kumar Ghosh4

REVIEW WORK ON VARIOUS GLASS NANO COMPOSITES AND THEIR CRYSTALLINE COUNTERPARTS: ELECTRICAL TRANSPORT PROPERTIES

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This review paper presents a comparative study of electrical properties of some glassy Nanocomposites and their crystalline counterparts that are being studied in recent time. Its gives information about the preparation process and comparison between electrical properties of various amorphous and crystalline glass nano composites.

Rakesh Kumar Singh1*, Prerona Sanyal2, Aloke Saha3

DESIGN OF STI, NTI AND PTI WITH NORMAL PROCESS E-MOSFET ON 65NM CMOS TECHNOLOGY

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This paper explores design idea for STI (Standard Ternary Inverter), NTI (Negative Ternary Inverter) and PTI (Positive Ternary Inverter) using Normal Process Enhancement-type MOS devices without threshold modifications. The working principle for aforesaid TI (Ternary Inverter) circuits is presented first. All the TI circuits are designed and optimized next on TSMC 65nm CMOS technology applying BSIM4 device parameter with 1.0V supply rail at 27°C temperature using S-Edit of Tanner EDA V.16. The physical design has been performed using Microwind3.1. The trit value “0”, “1” and “2” are represented with 0V, 0.5V and 1.0V respectively. Designed circuits are validated by applying all possible test pattern dynamically and the transient response through T-Spice simulation using W-Edit is presented. The PWL (Piece Wise Linear) input source has been used to generate custom ternary input for transient simulation. The circuit performance parameters in terms of device-count, area, propagation-delay, average-power and Power-Delay-Product (PDP) are evaluated and recorded.

Effect of F-shaped periodic structures over Half Mode Substrate Integrated Waveguide (HMSIW) elemental structure is presented in this paper. Single and multiple configurations of F-shaped periodic EBG structures are etched out off the top conducting layer of the HMSIW section and presented with simulated outcomes. The method produced successfully creates stopband within the transmission passband and enables to be applied on microwave Ku-band applications. All experiments are carried out over a substrate with dielectric constant 3.2 and material thickness of 30mils. The designs are simple, compact and easy to fabricate.

Present proposal deals with induction based water heating arrangement where the high frequency alternating current is flowing through a helical shaped heating coil and the non metallic water pipeline is placed inside the heating coil. Metal teeth are present inside the non metallic pipeline where the high frequency flux is induced and eddy current is generated. The eddy current is responsible for the heat generation within the metal teeth and the turbulent flow of water inside the metal teeth makes the cold water be hot. The main source of electrical energy is from PV array which provides DC current source. So, suitable arrangement of dc to ac inverter is also applied to convert the dc current into high frequency ac current.

Soumendra Pain1, N.N.Pathak2, Tribeni Prasad Banerjee3*

IMAGE COMPRESSION-A STUDY ANALYSIS AND IMPROVEMENTS USING DISCRETE WAVELET TRANSFORM

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The quality of a compressed image is one of the essential criteria nowadays. Compression of images is a technique which is concerned with the reduction of the image redundant data, where data redundancy is one of the primary issues in digital image processing. The reduction process is removal of only redundant data so there will be improvement in the data storage capacity and the bandwidth required for data compression and reconstruction of images with insignificant loss of information. Even though there are many compression techniques to facilitate better performance in matter of memory efficiency and image compression, wavelets are trendier and are widely used in the field of digital images. The primary goal of these works is to study and analysis of the DWT compression method to establish the power typical DWT for web application. The usefulness of the algorithm has been applied in excess of some real images, and the performance of the algorithm has been compared with other common compression standards. This technique is simple in implementation and utilizes less memory and time. Also a software algorithm has been developed and executed to compress and decompress the given images using Wavelet in a MATLAB platform. This proposed technique provides adequate high compression ratios compared to other existing (DWT) based compression techniques without insignificant compromise of image quality

Srijita Chakraborty1*, Nipun Agarwal2, Neelanjana Giri3, Subhadra Deb Roy4, Surajit Batabyal5

FREQUENCY TUNING CHARACTERISTICS & BANDWIDTH ENHANCEMENT FOR HEXAGONAL MICROSTRIP ANTENNA BY INTEGRATING L SHAPED DGS

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A symmetrical defective ground structure (i.e. DGS) in L shape has been implemented in the ground surface of a hexagonal microstrip antenna, resonant at second WLAN application band i.e. 5.8GHz. The length of the DGS is altered accordingly to achieve the lower application frequency bands viz. GSM band, Bluetooth band ,WiMax band and first WLAN respectively. As a consequence, frequency tunability with optimal bandwidth and gain is observed in the application frequency bands for proposed antenna. Further dual L shaped DGS is incorporated in the ground plane of the proposed antenna to achieve enhanced bandwidth in GSM and WiMax application bands.

This paper provides an overview of an alternative information security analysis approach like gametheoretic modelling of risk, threats and vulnerability and discusses its advantages over more conventional risk assessment techniques.

In this paper, coaxial feed microstrip patch antenna array is designed. For designing of microstrippatch antenna array selectionof suitable substrate material is important. The substrate properties such as its dielectric loss tangent ,relative permittivity,relative permeability have a good effect on the antennacharacteristics. This paper represents that antenna performance changes with changing substrate material.Four types of materials were selected i.e. glass, FR4_epoxy, Polyflon Copper-Clad ULTEM (tm) and rubber. The results demonstrated a good agreement between simulated return losses and radiation patterns of all five substrates used for coaxial feed microstrip patch antenna array. The designed coaxial feedmicrostrip patch antenna array operates at 5.8 GHz. The design is being simulated using HFSS (High Frequency Structure Simulator)software.