Poulose Jacob,K; Preetha Theresa, Joy(IEEE, July 18, 2012)
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Abstract:
Data caching can remarkably improve the
efficiency of information access in a wireless ad hoc
network by reducing the access latency and bandwidth
usage. The cache placement problem minimizes total data
access cost in ad hoc networks with multiple data items.
The ad hoc networks are multi hop networks without a
central base station and are resource constrained in terms
of channel bandwidth and battery power. By data caching
the communication cost can be reduced in terms of
bandwidth as well as battery energy. As the network node
has limited memory the problem of cache placement is a
vital issue. This paper attempts to study the existing
cooperative caching techniques and their suitability in
mobile ad hoc networks.
Description:
Data Science & Engineering (ICDSE), 2012 International Conference on
Sudha Kartha, C(Japan society of applied physica, November 8, 2006)
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Abstract:
Copper doped methylene blue sensitized poly(vinyl alcohol) (MBPVA)–acrylamide films were fabricated to improve the
storage life of recorded gratings. The films were fabricated using gravity settling method and the copper chloride
concentration was optimized as 3:18 10 3 mol/l for a dye concentration of 6:2 10 4 mol/l. The gratings recorded on the
optimized film constitution could be stored for months with stable diffraction efficiency (24%) without any chemical or
thermal fixing techniques. The resolution of the material is found to be unaffected with the addition of copper chloride.
Rani, Joseph(Department of Polymer Science and Rubber Technology, November 8, 2006)
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Abstract:
Copper doped methylene blue sensitized poly(vinyl alcohol) (MBPVA)–acrylamide films were fabricated to improve the
storage life of recorded gratings. The films were fabricated using gravity settling method and the copper chloride
concentration was optimized as 3:18 10 3 mol/l for a dye concentration of 6:2 10 4 mol/l. The gratings recorded on the
optimized film constitution could be stored for months with stable diffraction efficiency (24%) without any chemical or
thermal fixing techniques. The resolution of the material is found to be unaffected with the addition of copper chloride.
Sreekumar, K(Japaneese society of Applied physics, November 8, 2006)
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Abstract:
Copper doped methylene blue sensitized poly(vinyl alcohol) (MBPVA)–acrylamide films were fabricated to improve the
storage life of recorded gratings. The films were fabricated using gravity settling method and the copper chloride
concentration was optimized as 3:18 10 3 mol/l for a dye concentration of 6:2 10 4 mol/l. The gratings recorded on the
optimized film constitution could be stored for months with stable diffraction efficiency (24%) without any chemical or
thermal fixing techniques. The resolution of the material is found to be unaffected with the addition of copper chloride.
Prathapachandra Kurup, M R; Reena, T A(Elsevier, March 15, 2010)
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Abstract:
Five copper(II) complexes [CuLCl]2·CuCl2·4H2O (1), [CuLOAc] (2), [CuLNO3]2 (3), [CuLN3] (4) and
[CuLNCS]·3/2H2O (5) of di-2-pyridyl ketone-N4-phenyl-3-semicarbazone (HL) were synthesized and
characterized by elemental analyses and electronic, infrared and EPR spectral techniques. In all these
complexes the semicarbazone undergoes deprotonation and coordinates through enolate oxygen, azomethine
and pyridyl nitrogen atoms. All the complexes are EPR active due to the presence of an unpaired
electron. EPR spectra of all the complexes in DMF at 77K suggest axial symmetry and the presence of
half field signals for the complexes 1 and 3 indicates dimeric structures
Description:
Spectrochimica Acta Part A 76 (2010) 322–327 doi:10.1016/j.saa.2010.03.011
Mohammed Yusuff, K K; Rani, Abraham(Elsevier,Journal of Molecular Catalysis A: Chemical 198 (2003) 175–183, December 2, 2002)
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Abstract:
Copper(II) complexes of two biologically important ligands, viz., embelin (2,5-dihydroxy-3-undecyl-2,5-cyclohexadien
1,4-dione) and 2-aminobenzimidazole were entrapped in the cages of zeolite Y by the flexible ligand method. The capability
of these compounds in catalyzing the reduction of oxygen (industrially known as deoxo reaction) was explored and the
results indicate an enhancement of the catalytic properties from that of the simple copper ion exchanged zeolite. These
point to the ability of the ligands in enhancing the oxygen binding capability of the metal ion. Elemental analyses, Fourier
transform infrared (FTIR), diffuse reflectance and EPR spectral studies, magnetic susceptibility measurements, TG, surface
area analyses and powder X-ray diffraction studies were used in understanding the presence, composition and structure of
the complexes inside the cages. The study also reveals the increased thermal and mechanical stability of the complexes as a
result of encapsulation.
Rapheal,P F; Manoj, E; Prathapachandra Kurup, M R(Elsevier, 2007)
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Abstract:
Ten copper(II) complexes {[CuL1Cl] (1), [CuL1NO3]2 (2), [CuL1N3]2 · 2/3H2O (3), [CuL1]2(ClO4)2 · 2H2O (4), [CuL2Cl]2 (5), [CuL2N3] (6), [Cu(HL2)SO4]2 · 4H2O (7), [Cu(HL2)2] (ClO4)2 · 1/2EtOH (8), [CuL3Cl]2 (9), [CuL3NCS] · 1/2H2O (10)} of three NNS donor thiosemicarbazone ligands {pyridine-2-carbaldehyde-N(4)-p-methoxyphenyl thiosemicarbazone [HL1], pyridine-2-carbaldehyde-N(4)-2-phenethyl thiosemicarbazone [HL2] and pyridine-2-carbaldehyde N(4)-(methyl), N(4)-(phenyl) thiosemicarbazone [HL3]} were synthesized and physico-chemically characterized. The crystal structure of compound 9 has been determined by X-ray diffraction studies and is found that the dimer consists of two square pyramidal Cu(II) centers linked by two chlorine atoms.
Sumam, Mary Idicula; Bindu, Baby Thomas; Sindhu, L(February 9, 2013)
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Abstract:
In this paper a method of copy detection in short Malayalam text passages is proposed. Given two passages one as the source text and another as the copied text it is determined whether the second passage is plagiarized version of the source text. An algorithm for plagiarism detection using the n-gram model for word retrieval is developed and found tri-grams as the best model for comparing the Malayalam text. Based on the probability and the resemblance measures calculated from the n-gram comparison , the text is categorized on a threshold. Texts are compared by variable length n-gram(n={2,3,4}) comparisons. The experiments show that trigram model gives the average acceptable performance with affordable cost in terms of complexity
Anu, Gopinath; Chandramohanakumar, N(Department of Chemical Oceanography,School of Marine Sciences, 2002)
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Abstract:
The present study focuses on the biochemical aspects of six islands belonging to Lakshadweep Archipelago – namely Kavaratti, Kadamath, Kiltan, Androth, Agathy and Minicoy. Lakshadweep, which is an area biologically significant due to isolation from the major coastline, remains as one of the least studied areas in Indian Ocean. The work, processed out the distributional pattern of trace metals among the biotic (corols, sea weeds and sea grass) and abiotic component (sediments) of ecosystem. An effort is made to picturise the spatial distribution pattern of different forms of nitrogen and phosphorus in the various sedimentary environments of the study area. Studies on the biogeochemical and nutrient aspects of the concerned study area scanty. In Lakshadweep, the local life is very dependent on reefs and its resources. The important stress which produce a threatening effort on the existence for coral reefs are anthropogenic-namely-organic and inorganic pollution from sewage, agricultural and industrial waters, sediment damage from excessive land cleaning, and over exploitation particularly through destructive fishing methods. In addition these one other more localized or less service anthropogenic stress: pollution by oil and other hydrocarbons, complex organic molecular and heavy metal pollution, and destructive engineering practices.
Sujatha, C H; Manju, Nair P; Akhil, P S(Indian Academy of Sciences, December , 2013)
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Abstract:
Geochemical composition is a set of data for predicting the climatic condition existing in an ecosystem.
Both the surficial and core sediment geochemistry are helpful in monitoring, assessing and evaluating the
marine environment. The aim of the research work is to assess the relationship between the biogeochemical
constituents in the Cochin Estuarine System (CES), their modifications after a long period of anoxia
and also to identify the various processes which control the sediment composition in this region, through
a multivariate statistical approach. Therefore the study of present core sediment geochemistry has a
critical role in unraveling the benchmark of their characterization. Sediment cores from four prominent
zones of CES were examined for various biogeochemical aspects. The results have served as rejuvenating
records for the prediction of core sediment status prevailing in the CES
Description:
J. Earth Syst. Sci. 122, No. 6, December 2013, pp. 1557–1570
Mathiazhagan, A; Rani, Joseph; Narayanan, K P; Palaniandy, Seralathan(2010)
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Abstract:
Corrosion characteristics of brass panels were investigated
in the Vembanad estuarine water (Cochin Harbor), India over a
period of one year. The corrosion rate of brass samples during
exposure was determined by gravimetric method and fouling
on panels was assessed, exposure-wise, in terms of biomass.
Corrosion products were identified by X-Ray diffraction. The
results of the study were discussed in the light of the seawater
characteristics
Description:
Journal of Marine Science and Technology, Vol. 18, No. 5, pp. 719-722 (2010)
Mathiazhagan, A; Satheesh Babu, P K; Nandakumar, C G(October , 2014)
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Abstract:
Corrosion represents one of the largest through
life cost component of ships. Ship owners and operators
recognize that combating corrosion significantly impacts the
vessels’ reliability, availability and through life costs. Primary
objective of this paper is to review various inspections,
monitoring systems and life cycle management with respect to
corrosion control of ships and to develop the concept of
“Corrosion Health” (CH) which would quantify the extent of
corrosion at any point of ships’ operational life. A system
approach in which the ship structure is considered as a
corrosion system and divided into several corrosion zones, with
distinct characteristics, is presented. Various corrosion
assessment criteria for assessment of corrosion condition are
listed. A CH rating system for representation of complex
corrosion condition with a numeric number along with
recommendations for repair/maintenance action is also
discussed
Description:
International Journal of Environmental Science and Development, Vol. 5, No. 5, October 2014
Pravinkumar,P A; Mohanan, P; K G Nair(Indian Journal of Radio & Space Physics, December , 1981)
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Abstract:
A technique for improving the coupling between a feed horn and reflector by using corrugated metallic flanges is presented.
Experimental data for flanges of varying parameters are given and theoretical explanation is supplemented
Zachariah,E J; Dr.Nair, K G(Cochin University of Science And Technology, August , 1981)
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Abstract:
The need for improved feed systems for large reflector antennas employed in Radio Astronomy and Satellite tracking spurred the interest in horn antenna research in
the 1960's. The major requirements were to reduce spill over, cross-polarisation losses,and to enhance the aperture efficiency to the order of about 75-8O%L The search for such a feed culminated in the corrugated horn. The corrugat1e 1 horn triggered widespread interest and enthusiasm, and a large amount of work(32’34’49’5O’52’53’58’65’75’79)has already been done on this type of antennas. The properties of corrugated surfaces has been investigated in detail.
It was strongly felt that the flange technique and the use of corrugated surfaces could be merged together to obtain the advantages of both. This is the idea behind the present work. Corrugations are made on the surface of flange elements. The effect of various corrugation parameters are studied. By varying the flange parameters, a good amount of data is collected and analysed to ascertain the effects of corrugated flanges. The measurements are repeated at various frequencies, in the X— and S-bands. The following parameters of the system were studied: (a) beam shaping (b) gain (c) variation of V.S.U.R. (d) possibility of obtaining circularly polarised
radiation from the flanged horn. A theoretical explanation to the effects of corrugated flanges
is attempted on the basis of the line-source theory. Even though this theory utilises a simplified model for the calculation of radiation patterns, fairly good agreement between the computed pattern and experimental results are observed.
Description:
Department of physics, Cochin University of Science And Technology
Sundaresan, P K; Dr.Rajendra Prasad, P N(Cochin University of Science And Technology, January , 1993)
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Abstract:
It is a fact that there now exists a sound framework of accounting theory
to ascertain the working results and the investment status of hospitals.
Yet, there is no system of accounting in practice to conduct its
activities with utmost efficiency. No attempts have hitherto been made
for the continuous improvement in the servics rendered by hospitals.
Personal investments in hospitals have made the interaction of business
to some extent.Planning, decision making and control assume increasing
importance as hospitals grow in size and complexity. Moreover, wise and
effective utilisation of resources should be ensured. The importance of
cost cannot be overlooked in this context. Cost is the most effective
factor in the determination of the prices of hospital services rendered.
The important managerial functions have to rely heavily on accurate and
timely cost information. More people can be provided with services if no
services cost more than what is a must to provide the necessary level of
care. The price paid for high cost technology for a few is no technology
at all for the many. Hence no pains must be spared in ascertaining,
presenting, controlling and reducing costs. An effective system of Cost
Accountancy and Cost Control is imperative for the survival of hospitals
in the intensely competitive conditions of today. The valuable objective
of "better patient care" can be attained only if the management can make
use of the various tools and techniques to ascertain, control and reduce
each item of cost in hospitals. Constant efforts must be made by the
management to continuously improve their services and bring down costs
and prices of all hospital services. Cost Accountancy has made its
impresssive impact on almost all the spheres of human activities. It is
high time a comprehensive Cost Accountancy and Cost Control system be
implemented in hospitals. The problem under study thus is the designing
of a sound and full-fledged Cost Accountancy and Cost Control system that
suits the requirements of hospitals. It is for the first time in India
during the evolution of Cost Accountancy that a comprehensive cost system
is tried in hospitals.
Description:
school of management studies, Cochin University of Science And Technology