3,807 research outputs found
Low Power Reversible Parallel Binary Adder/Subtractor
In recent years, Reversible Logic is becoming more and more prominent
technology having its applications in Low Power CMOS, Quantum Computing,
Nanotechnology, and Optical Computing. Reversibility plays an important role
when energy efficient computations are considered. In this paper, Reversible
eight-bit Parallel Binary Adder/Subtractor with Design I, Design II and Design
III are proposed. In all the three design approaches, the full Adder and
Subtractors are realized in a single unit as compared to only full Subtractor
in the existing design. The performance analysis is verified using number
reversible gates, Garbage input/outputs and Quantum Cost. It is observed that
Reversible eight-bit Parallel Binary Adder/Subtractor with Design III is
efficient compared to Design I, Design II and existing design.Comment: 12 pages,VLSICS Journa
Two-Hop Routing with Traffic-Differentiation for QoS Guarantee in Wireless Sensor Networks
This paper proposes a Traffic-Differentiated Two-Hop Routing protocol for
Quality of Service (QoS) in Wireless Sensor Networks (WSNs). It targets WSN
applications having different types of data traffic with several priorities.
The protocol achieves to increase Packet Reception Ratio (PRR) and reduce
end-to-end delay while considering multi-queue priority policy, two-hop
neighborhood information, link reliability and power efficiency. The protocol
is modular and utilizes effective methods for estimating the link metrics.
Numerical results show that the proposed protocol is a feasible solution to
addresses QoS service differenti- ation for traffic with different priorities.Comment: 13 page
Fingerprint Verification based on Gabor Filter Enhancement
Human fingerprints are reliable characteristics for personnel identification
as it is unique and persistence. A fingerprint pattern consists of ridges,
valleys and minutiae. In this paper we propose Fingerprint Verification based
on Gabor Filter Enhancement (FVGFE) algorithm for minutiae feature extraction
and post processing based on 9 pixel neighborhood. A global feature extraction
and fingerprints enhancement are based on Hong enhancement method which is
simultaneously able to extract local ridge orientation and ridge frequency. It
is observed that the Sensitivity and Specificity values are better compared to
the existing algorithms.Comment: 7 pages IEEE format, International Journal of Computer Science and
Information Security, IJCSIS November 2009, ISSN 1947 5500,
http://sites.google.com/site/ijcsis
Measuring Quality of Service in Retail Outlets Using Fuzzy Numbers
The measurement of quality of service in any service providing organisation has been a very complex process to deal with. Most of the attributes here are intangible; largely depend upon customers’ expectations and perceptions. The quality of service may be poor, average, good, and so on depending upon the performance of the service provider. The linguistic terms like poor, average and good could be vague (fuzzy) unless various attributes of a particular service are understood precisely. In order to avoid the ambiguity of the concept associated with customers’ expectations and perceptions of service quality fuzzy numbers are widely used in many complex management issues. In this paper we focus on quantifying the quality of service in retail outlets based on some specific characteristics using fuzzy numbers. Key words: Quality of service; Retail outlets; linguistic terms; fuzzy number
Vacuum ultraviolet photoabsorption of prime ice analogues of Pluto and Charon
Here we present the first Vacuum UltraViolet (VUV) photoabsorption spectra of ice analogues of Pluto and Charon ice mixtures. For Pluto the ice analogue is an icy mixture containing nitrogen (N2), carbon monoxide (CO), methane (CH4) and water (H2O) prepared with a 100:1:1:3 ratio, respectively. Photoabsorption of icy mixtures with and without H2O were recorded and no significant changes in the spectra due to presence of H2O were observed. For Charon a VUV photoabsorption spectra of an ice analogue containing ammonia (NH3) and H2O prepared with a 1:1 ratio was recorded, a spectrum of ammonium hydroxide (NH4OH) was also recorded. These spectra may help to interpret the P-Alice data from New Horizons
Vibrational (FT-IR and FT-Raman) spectra and quantum chemical studies on the molecular structure of p-hydroxy-N-(p-methoxy benzylidene) aniline
The FT-IR and FT-Raman spectra of p-hydroxy-N-(p-methoxy benzylidene) aniline have been recorded in the region 4000-400 cm−1 and 3500-100 cm−1, respectively. The optimized molecular geometry, vibrational frequencies in ground state have been calculated using density functional B3LYP methods (DFT) with 6-31+G(d,p) and 6-311++G(d,p) basis sets. The observed FT-IR and FT-Raman vibrational frequencies have been analysed and compared with theoretically predicted vibrational frequencies. The geometries and normal modes of vibration obtained from B3LYP/6-311+G(d,p) and B3LYP/6-311++G(d,p) methods are reliable compared with the experimental data. The natural bonding orbital (NBO) analysis of the investigated molecule have been computed using DFT/ B3LYP/6-311++G(d,p) calculations. The calculated HOMO and LUMO energies show that charge transfer occurs within molecule
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