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A Novel Method of Tamil Character Recognition
Using Slope Method
-- S Selvakumar Raja and Mala John
Tamil, a south Indian language, is one of the oldest languages in the world. This paper presents an efficient
slope method for recognizing Tamil characters based on extracted features like horizontal lines, vertical lines,
and curves. Various preprocessing operations like segmentation, thresholding, skeletonization (or) thinning
and normalization were performed on the digital image to enhance the quality of the image. The extracted
features were used to train and test the neural network. The proposed system has achieved very good recognition rate
on the Tamil character database. The results obtained are comparable to the best ones reported in the
recent literature.
©2010 IUP. All Rights Reserved.
Evaluation of Microstructural Parameters in Molybdenum Sulphoselenide, MoS2-xSex (0 = x = 2) Compounds
-- T K Mandal and S K Srivastava
Microstructural parameters, such as crystallite size (P), dislocation density
(ρ) and root mean square (rms) strain
(<e2>)1/2, and layered disorder parameters, such
as mean fractional change in interlayer spacing
(γ) and proportions of the plane affected by such disorders
(γ), were evaluated with the help of X-ray Diffraction (XRD)
studies for molybdenum sulphoselenide,
MoS2-xSex (0 ≤ x ≤ 2) compounds. These
structural defect parameters were correlated with the compositional changes. The
room temperature thermoelectric power experiments and two-probe electrical
conductivity measurements confirmed that
MoS2-xSex (0 ≤ x ≤ 2) and
MoSe2 are semiconductors with n and
p type conductivity respectively. The variations of conductivity
with composition have been correlated in terms of the structural parameters like
r, (<e2>)1/2
and existing theoretical models. Microstructure changes arising
with composition have been studied using Scanning Electron Microscopic (SEM).
©2010 IUP. All Rights Reserved.
Synthesis of Oligonucleotides
on Nylon Beads and Hybridization Studies
of Oligonucleotides Synthesized in Situ
-- Ajay Kumar
Nylon beads are readily available and are much cheaper than
Controlled-Pore Glass (CPG) and other supports used for oligonucleotide synthesis. A method to derivatize the nylon beads containing disulphide bond is
reported. The amino groups were first introduced by reacting the beads with polyethyleneimine. The amino group was
then converted to thiol group by reacting with N-acetyl-DL-homocysteinthiolactone. The thiol derivatized
beads were next activated with 2, 2'-dithiobis (5-nitro pyridine). The thiol activated nylon beads thus obtained
were reacted with 4, 4'-dimethoxytrityl-6-mercaptohexane.
The oligonucleotides synthesized on nylon beads
derivatized support showed a homogeneous nature comparable with the homogeneity of oligonucleotides synthesized
on CPG-support. Hybridization studies on
oligonucleotides synthesized in situ on nylon beads carried out using 32P labeled complementary oligonucleotide showed hybridization yield of 5.7%, while the hybridization yield
with noncomplementary oligonucleotide was only 0.1%.
© 2010 IUP. All Rights Reserved.
Extended Cyber Defense Architecture
for a University: A Case Study
-- Hemraj Saini and T C Panda
The paper deals with cyber defense architecture and its possible implementation for a
campus-wide network. It gives an extensive case study to secure the critical online information from internal and external
malicious attacks. Under this case study, different security measures and their usage
are presented in two categories. The first category
is about creating awareness through education, and the second
is through engineering architecture. These two categories of security measures
are implemented at different specific discrete points in the network.
All the possible discrete points and the detailed specifications to implement the security measures on them
are discussed. Finally, the overall design of the secure cyber defense architecture
is presented.
© 2010 IUP. All Rights Reserved.
Study of Decolorization of Biomethanated
Distillery Effluent by Aspergillus oryzae JSA-1
-- Snehal Agnihotri, Vikram Ghole and Harsha Chatrath
Optimization of the growth medium parameters for maximum decolorization of biomethanated distillery
effluent by Aspergillus oryzae JSA-1 was carried
out, which has proved to be useful in increasing the rate of decolorization
by Aspergillus oryzae JSA-1. The quantitative analysis of the pollution parameters of BME media with
different biomethanated effluent samples before and after the fungal growth
for 10 days was carried out to determine the percentage reduction of pollution parameters. It was found that the fungal treatment reduced color (around
60-80%) and COD (around 80-90%) effectively. The optimization process of the effluent decolorization by
pre-grown wet biomass was also studied. Optimization of the process
parameters, such as pH, inoculum size, incubation time and concentration of the
effluent, for biomass-based decolorization of biomethanated distillery effluent
by Aspergillus oryzae JSA-1 indicated that the culture has strong decolorization property of the biomethanated
distillery effluent (around 65%) at a pH of 4.5 for 30 min incubation on a rotary shaker (150 rpm) at
30 °C.
© 2010 IUP. All Rights Reserved.
Air-Gap Rectangular Microstrip Antenna
for Wide Impedance Bandwidth, High Gain and
Effective Reduction of Size
-- G P Maddani, R B Konda, S N Mulgi and P V Hunagund
The paper presents a novel design of an air-gap rectangular Microstrip Antenna (MSA) comprising a
modified ground plane for wide impedance bandwidth, high gain and effective reduction of size. In comparison with
a conventional rectangular MSA, the proposed antenna enhances the impedance bandwidth by 7.6 times
and the gain by 2.03 times and reduces the effective size of the antenna by 60.57% without changing the nature
of the broadside radiation characteristics. The antennas presented in this study are simple in their geometry
and fabricated using low-cost substrate material. These antennas may find application in Wireless Local
Area Network (WLAN) and Global System for Mobile Communication (GSM). The design concept of antennas
has been described and experimental results have been discussed.
© 2010 IUP. All Rights Reserved.
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