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The finite impulse response (FIR) filter designed using window method is a very popular, simpler and well working for various applications. This paper presents various window functions for designing FIR low pass filters and their comparative performance is given. Performance of windows are analyzed in both time and frequency domains. In term of main lobe-width, the Kaiser window is the most supercilious...
Now a days the home environment is introduced with a network enabled digital technology. This type of home automation increases the connectivity of smart equipment within the room. With the continuity of home automation we have designed a circuit which will track the person in the living room by using ultrasonic distance sensor. Previous research of human tracking was done depending on IR and PIR...
This paper investigates a signal processing approach of fish abundance estimation in the Sea. There is a high demand for underwater fish estimation due to the increase in current importance of sea fishes. These increase our knowledge about the state of a stock and improve assessment of many commercially valuable fish species. The conventional techniques used to estimate fishes in sea are visual sampling...
Optimal operating parameters for the study of zirconium-hydrogen system with the help of glow discharge optical emission spectroscopy have been selected. Hydrogen distribution from the surface to the depth in zirconium alloy Zr-1Nb modified by pulsed electron beam after hydrogen saturation from gas atmosphere at temperature 350 °C has been studied.
Graphene nanoribbons (GNRs) are nowadays considered as a promising candidate for the upcoming nanoelectronics. GNRs are fabricated in laboratory by cutting a monolayer graphene into nano strip ribbon. Armchair GNR (A-GNR) which is now widely used because of its semiconducting electronic properties. Band gap energy, velocity of carrier, density of state (DOS) which are the basic features in observing...
Zn-Al hydrotalcites were prepared by coprecipitation method with the Zn/Al molar ratio of 3:1, 2:1 and 1:1. Sodium dodecyl sulfate (SDS) and 2-carboxyethyl phenyl phosphinic acid (CEPPA) were adopted to modify hydrotalcite by coprecipitation method. The structure of Zn-Al hydrotalcites and the modified ones were characterized by X-ray diffraction (XRD), Fourier transform infrared spectrum (FTIR) and...
In this paper, flash type A/D converter is combined with integrator type A/D converter and this result a significant increase in conversion speed of integrator type A/D converter. Eight additional comparators are used with integrator type A/D converter to make flash architecture and this makes the integrator type converter 8 times speedy than before. The circuit is simulated in PSIM simulator and...
Prepared the method of induction melting by using two kinds of carbon content Fe-20%Cu alloy material and having TIG welding, analyze Fe-20%Cu alloy welded organizational change and performance characteristics. TIG welding test results show that the texture of base metal, heat affected zone and melting zone of carbon content of 0.017% Fe-20%Cu material is ferrite and the mesh Cu. But the grains in...
Different processes that use energy and machines that do work do not have perfect efficiency. So energy is wasted from these processes in the form of heat. Power generating stations, industrial processes, rice mills, brick fields and other human activities are major sources of waste heat. Mud stoves used in rural areas for cooking purpose produce above 85% of waste heat. This wasted heat can be used...
Efficient coding is one of the challenging aspects of information and communication theory. On the other hand, the natural languages such as Bengali is coded using Unicode technology which requires more space and thus takes more time to transfer the data of that language. In this paper, we have proposed a novel algorithm to represent Bengali text efficiently and then to compress the text offering...
We investigate the terminating concept of BKZ reduction first introduced by Hanrot et al. [Crypto'11] and make extensive experiments to predict the number of tours necessary to obtain the best possible trade off between reduction time and quality. Then, we improve Buchmann and Lindner's result [Indocrypt'09] to find sub-lattice collision in SWIFFT. We illustrate that further improvement in time is...
Explosive welding was used to form reliable joining between commercially pure titanium and stainless steel. To prevent cracking at the interface induced by brittle intermetallic bronze — tantalum interlayer was used. Microstructural characterization of produced composite was analyzed using optical and scanning electron microscopy as well as energy dispersive analysis. Determination of structure has...
The modification of implant surface is in the focus of many scientists worldwide. In this study, multifunctional biocomposite on the basis of calcium phosphate coating and silver nanoparticles has been fabricated through the use of nanofabrication techniques. Dense nanocrystalline HA film was deposited over AgNPs. The properties as well as the in vitro behavior of the developed biocomposites have...
This paper introduces a new low-Ag lead free solder alloy which possesses lower cost and higher performance. Also, the new alloy shows some satisfactory properties in solderability, HTS aging resistance, thermal cycling resistance, Shear strength, vibration shock aging and electromigration resistance. Experiments results indicated that both Ni and Bi elements in the low-Ag lead free solder alloy could...
Rare earth element samarium was added into Sn-3.0Ag-0.5Cu solder, and the amount is 0, 0.025, 0.05, 0.1, 0.2wt% respectively. The solder SnAgCu-XSm melting point was studied by differential scanning calorimeter, the wetting spreading area on Cu substrate was measured and the interface was studied with scanning electron microscope. The results show that the melting point 217.19 °C is the lowest with...
Armchair Graphene nanoribbons (A-GNRs) are important tonic in nanoscale transistor dominated laboratory because of its semiconducting properties. Edge disorder in C-C bond or effect in A-GNR has an important effect on electronic properties like bandgap, capacitance. In previous literature these properties are investigated without considering any edge effect of A-GNRs. In this paper we will observe...
The methodology of development of adequate high-frequency phase comparison line protection modeling tools is given in the article. These tools are proposed to be used for phase comparison protection settings optimization with using arrays of instantaneous values of particular primary regime information that can be obtained by emergency events recorders or appropriate electric power systems (EPS) simulators...
Plasma polymerized 2-(Diethylamino) ethyl methacrylate (PPDEAEMA) thin films were prepared through glow discharge of 2-(Diethylamino)ethyl methacrylate (DEAEMA) using a capacitively coupled reactor. The variation of ac conductivity σac with frequency from 100 Hz to 100 kHz in the temperature range from 298 to 398 K exhibits that the σac increases as frequency increases. A little variation in conductivity...
The detailed electrical model of the transformer windings was developed. The possibility of detecting negligible changes in the geometrical pattern of the windings was investigated by testing of the impulses with nanosecond rising edge.
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