Mohanan, P; Aanandan,C K; K G Nair(Indian Journal of Radio & Space Physics, February , 1984)
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Abstract:
A modified H-plane sectoral horn antenna with identical E- and'H- plane.patterns over the X-band frequency is discussed.
This system has significantly reduced side lobes and hack lobes. Half=power beam width and gain of the antenna are also
improved with enhanced matching , Experimental results for a number of horns with various flanges are presented . These find
practical application for illuminating symmetric antennas like paraboloids and polarization measurements in radio
astronomy, etc. Compared to the fixed pyramidal horns. the present system offers great convenience in trimming the antenna
characteristics
Mohanan, P; Pravinkumar,P A; K G Nair(Indian Journal of Radio & Space Physics, 1982)
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Abstract:
A simple technique for obtaining identical E- and H-plane patterns from E-plane sectoral feed horn is presented. Halfpower
beam width and gain of the antenna are also improved considerably. Experimental results for a number of horns with
flanges of various parameters are also presented. This system may find practical application in radar and space communication
systems
An antimedian of a pro le = (x1; x2; : : : ; xk) of vertices of a graph G is a
vertex maximizing the sum of the distances to the elements of the pro le. The
antimedian function is de ned on the set of all pro les on G and has as output
the set of antimedians of a pro le. It is a typical location function for nding a
location for an obnoxious facility. The `converse' of the antimedian function is the
median function, where the distance sum is minimized. The median function is
well studied. For instance it has been characterized axiomatically by three simple
axioms on median graphs. The median function behaves nicely on many classes
of graphs. In contrast the antimedian function does not have a nice behavior on
most classes. So a nice axiomatic characterization may not be expected. In this
paper such a characterization is obtained for the two classes of graphs on which
the antimedian is well-behaved: paths and hypercubes.
Bindu, Krishnan; Deepthy, A; Litty, Irimpan; Dann, V J; Nampoori, V P N(Elsevier, 2006)
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Abstract:
We report enhanced back scattering in nanometer-sized ZnO colloids prepared in two different media, by different methods. The FWHM of the back scattered cone and hence the mean free path varied with concentration of ZnO as well as particle size. The Lorentzian profile of backscattered cone indicates the presence of coherence.
Nampoori, V P N; Litty, Irimpan; Dann, V J; Krishnan, B; Deepthy, A; Radhakrishnan, P(Laser Physics, 2008)
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Abstract:
Light-scattering experiments gained prominence as potential applications of quantum optics, nonlinear
optics, and photon localization. The possibility of the realization of lasing action in random media has
created much interest in the study of the coherent structure of the backscattered light from disordered media.
Backscattering (BS) studies are carried out to analyze the possibilities of photon localization in colloidal silica.
The scattering enhancement is best associated with the density of the scatterers. The width of the BS cone and,
hence, the mean-free path is related to the concentration of the medium. The dependence of the photon wavelength
on the possible characteristics of the scattering is presented.
Ajaikumar,V; Jose,K A; Aanandan,C K; Mohanan, P; K G Nair(Microwave and Optical Technology Letters, October , 1992)
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Abstract:
Reduction of radar cross -section of dihedral corner reflectors using
simulated corrugated surface (.SCS) is reported. This technique is
found lo be more effective in the reduction of RCS or corner reflectors
for normal incidence . A typical reduction of 40-50 dB is
achieved using this method
Mohanan, P; Aanandan,C K; K G Nair(Department of Electronics, October , 1992)
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Abstract:
Reduction of radar cross -section of dihedral corner reflectors using
simulated corrugated surface (SCS) is reported. The technique is
found to be more effective in the reduction of RCS or corner reflectors
for normal incidence . A typical reduction of 40-50 dB is
achieved using this method.
Hatha, A A M; Paul, M; Rao, B(Academic Press Limited, 1998)
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Abstract:
One thousand, two hundred and sixty four samples of individually quick-frozen (IQF) peeled
and deveined raw and 914 samples of cooked ready to eat shrimp samples produced from
farm raised black tiger (Penaeus monodon) obtained from a seafood unit working under
HACCP concept were analysed for total aerobic plate count (APC), coliform count, Escherichia
coli, coagulase positive Staphylococci and Salmonella. The overall bacteriological
quality of the product was found to be good. Of the frozen raw shrimp, 96% of samples
showed APC below 105 while 99% of the frozen cooked ready-to-eat samples showed APC
less than 104. The APC ranged from 1·0´102 to 4·2´106 cfu/gm in frozen raw shrimp and from
1·0´102 to 6·4´104 cfu/gm in the frozen cooked shrimp. Prevalences of coliforms in raw
shrimp and cooked shrimp samples were 14·4% and 2·9% respectively. The coliform count
in raw products ranged from 1·0´101 to 2·5´103 cfu/gm and in the cooked products, from 1·0
´101 to 1·8´102 cfu/gm. Although all the cooked shrimp samples were free of coagulase
positive staphylococci, E. coli and Salmonella, 1·0, 2·0 and 0·1% of the frozen raw shrimp
samples tested positive for coagulase positive Staphylococci, E. coli and Salmonella
respectively. The Salmonella strain was identified as Salmonella typhimurium. The results
of the present study highlight the importance of implementation of HACCP system in the
seafood industry to ensure consistent quality of frozen seafood
Chandrasekaran, M; Krishna, C(Springer, May 9, 1996)
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Abstract:
Bacillus subtilis CBTK 106, isolated from
banana wastes, produced high titres of a-amylase when
banana fruit stalk was used as substrate in a solid-state
fermentation system. The e¤ects of initial moisture content,
particle size, cooking time and temperature, pH,
incubation temperature, additional nutrients, inoculum
size and incubation period on the production of a-
amylase were characterised. A maximum yield of
5 345 000 U mg~1 min~1 was recorded when pretreated
banana fruit stalk (autoclaved at 121 ¡C for
60 min) was used as substrate with 70% initial moisture
content, 400 lm particle size, an initial pH of 7.0, a temperature
of 35 ¡C, and additional nutrients (ammonium
sulphate/sodium nitrate at 1.0%, beef extract/peptone
at 0.5%, glucose/sucrose/starch/maltose at 0.1% and
potassium chloride/sodium chloride at 1.0%) in the
medium, with an inoculum-to-substrate ratio of 10%
(v/w) for 24 h. The enzyme yield was 2.65-fold higher
with banana fruit stalk medium compared to wheat bran
Zakkariya, K A; Nishanth, P(Abhinav Publication, May , 2014)
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Abstract:
Worldwide, Micro, Small and Medium Enterprises (MSMEs) have been accepted as an engine of economic growth and for promoting equitable development. In developing countries including India, Micro, Small and Medium Enterprises sector constitute an important part in its development. In spite of this importance, this sector face number of constraints like absence of adequate and timely supply of bank finance, difficulties in procuring raw materials, marketing and distribution challenges and non availability of suitable technology. Review of literature found that there exists problem in accessing finance from banks and financial institutions and this problem may differ from region to region, between sectors, or between individual enterprises within a sector. This paper tries to identify the various barriers faced by these units in raising finance and also try to identify the various sources of finance other than banks. The study is based upon the primary data collected from the 200 MSMEs owners in Kozhikode District of Kerala. The data has been analysed with the help of percentage. The study attempts to submit some recommendations to enhance the overall credit accessibility to MSMEs sector
Description:
Abhinav National Monthly Refereed Journal of Research in
Commerce & Management,Volume 3, Issue 5 (May, 2014)
Jagathy Raj, V P; Prasanth, Poduval S; Pramod, V R(May , 2013)
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Abstract:
This paper aims to highlight the difficulties faced by organizations in implementing Total Productive Maintenance (TPM). The authors with their experience in TPM and the refinery industry have attempted to understand the factors that hinder implementation of TPM. The paper first explains in brief the concepts of TPM and why TPM is a must for organizations in this complex dynamic business environment. It then takes up the various issues that hamper implementation of TPM in industries. Solutions to overcome the barriers are discussed briefly but will be taken up in detail in another paper with specific reference to refinery scenario
Description:
INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH VOLUME 2, ISSUE 5, MAY 2013
Sugunan, S; Sherly, K B(Indian Journal of Chemistry, August , 1993)
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Abstract:
The electron donating properties of La2O3 activated at 300, 500 and 800·C and its mixed oxides with
alumina are reported from the studies on adsorption of electron acceptors of varying electron affinity on
La203. The electron acceptors with their electron affinity values given in parenthesis are:
7,7,8,8-tetracyanoquinodimethane (2.84 eV), 2,3,5,6-tetrachloro-I,4-benzoquinone (2.40 eV) and
p-dinitrobenzene(l.77eV). The basicity of the oxide has been determined by titration with n-butylamine and
Ho.max values are reported. The limit of electron transfer from the oxide to the electron acceptor is between
2.40 and 1.77 eV. It is observed that La203 promotes the surface electron properties of alumina without
changing its limit of electron transfer.
A new microwave dielectric resonator Ba(Tb1/2Nb1/2)03 has been prepared and characterized in the microwave frequency region. 1 wt% CeO2 is used as additive to reduce the sintering temperature. The sintered samples were characterized by XRD, SEM and Raman spectroscopic methods. Microwave DR properties such as er, Q factor and temperature-coefficient of resonant frequency (Ti) have been measured using a HP 8510 B Network Analyzer. Cylindrical DRs of Ba(Tb1/2Nbi/2)03 showed high Er (~ 37), high Q (~3,200) and low Tf (~10 ppm /°C) at 4 GHz and hence are useful for practical applications