Sebastian, Thomas; Dr.Meera Bai,M(Cochin University of Science And Technology, July , 2013)
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Abstract:
one of the key sectors, identified by the
Department of Industries Government of Kerala, for the cluster development
initiative is Handloom, which gives employment to over over 50,000 people
directly. Despite its age old tradition and fame, the performance of the sector
vis-à-vis power looms is not very rosy owing to (i) competition from cheap
power loom cloth from other states (ii) scarcity of quality yarn (iii) price
escalation of yarn, dyes, chemicals and other raw materials (iv) the shrinking
market for handlooms in Kerala (v) non-demand based production and
inadequacy of new designs and (vi) inefficiencies in the system, particularly in
the co-operative sector. Cluster based approach is adopted in the handloom
sector with the objective of providing necessary support mechanism to come out of the crisis that the sector faces now. While four cluster schemes are being
implemented in Kerala, it is under IHDS-CDP that the State got a sizeable
number of clusters benefiting a large number of societies and weavers- 24
handloom clusters, bringing 152 handloom co-operative societies and over
19,800 handloom workers under the Programme.
This research attempts to revisit the underlying rationale and context of
the new direction and would attempt to broadly analyze the growth trends under
the influence of cluster model adopted by the State IHDS-CDP for the revival
of handloom sector through a detailed study of the handloom co-operative
societies in Kerala. If handloom sector in Kerala can be revived using cluster
based approach, it can be easily concluded that cluster is capable of taking the
MSME in Kerala to a ‘high growth path.’ The study is aimed at understanding
how best clusters emerge as appropriate industrial organization suitable for the
current global structure of manufacture
Description:
Department of Applied Economics,Cochin University Of Science And Technology
Bright Singh, I S; PhIlip, R; Amar, B(Blackwell Publishing, June 19, 2006)
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Abstract:
Prawn shell waste collected from shrimp-processing plants in
Cochin, India, was subjected to fermentation using 20
chitinoclastic and proteolytic/non-proteolytic bacterial
strains. The products generated were analysed for protein,
lipid, total sugars, N-acetyl glucosamine, free amino acids
and ash. Shrimp diets were prepared using these 20 fermented
products and a control diet using raw prawn shell
waste. Feeding experiment was conducted with postlarvae
(PL21) of Indian white prawn, Fenneropenaeus indicus for a
period of 21 days. Biogrowth parameters such as mean
weight gain, feed conversion ratio, specific growth rate and
protein efficiency ratio were estimated and the animals were
challenged with white spot virus orally via diet. Enhanced
growth could be observed in prawns fed F134 and F124,
incorporated with the fermentation products generated using
Bacillus spp., C134 and C124 respectively. The percentage
survival of prawns after 7 days of challenge was found to be
highest for groups fed diet F111 incorporated with fermentation
product generated using Bacillus sp. These products of
bacterial fermentation hold promise as growth enhancers and
immunostimulants in aquaculture.
KEY WORDS: biogrowth parameters, feed
Antony,M T; Jose,T Payyappilly(Department of Applied Economics, Faculty of Social Science, February , 1992)
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Abstract:
For the analysis of productivity, capacity utilisation
and profitability the data relating to the manufacturing central
public sector enterprises in Kerala have been collected from the
published annual reports of the companies, public enterprises
surveys of Bureau of Public Enterprises (BPE), Economic Review of
State Planning Board (SPB) and statistical review of central
government enterprises by Centre for Monitoring Indian Economy
(CMIE). Primary data have been collected by conducting personal
interview with the high and middle level executives.
Multi-component reactions are effective in building complex molecules in a single step in a
minimum amount of time and with facile isolation procedures; they have high economy1–7
and thus have become a powerful synthetic strategy in recent years.8–10 The multicomponent
protocols are even more attractive when carried out in aqueous medium. Water
offers several benefits, including control over exothermicity, and the isolation of products
can be carried out by single phase separation technique. Pyranopyrazoles are a biologically
important class of heterocyclic compounds and in particular dihydropyrano[2,3-c]pyrazoles
play an essential role in promoting biological activity and represent an interesting template
in medicinal chemistry. Heterocyclic compounds bearing the 4-H pyran unit have received
much attention in recent years as they constitute important precursors for promising
drugs.11–13 Pyrano[2,3-c]pyrazoles exhibit analgesic,14 anti-cancer,15 anti-microbial and
anti-inflammatory16 activity. Furthermore dihydropyrano[2,3-c]pyrazoles show molluscidal
activity17,18 and are used in a screening kit for Chk 1 kinase inhibitor activity.19,20 They
also find applications as pharmaceutical ingredients and bio-degradable agrochemicals.21–29
Junek and Aigner30 first reported the synthesis of pyrano[2,3-c]pyrazole derivatives from
3-methyl-1-phenylpyrazolin-5-one and tetracyanoethylene in the presence of triethylamine.
Subsequently, a number of synthetic approaches such as the use of triethylamine,31
piperazine,32 piperidine,33 N-methylmorpholine in ethanol,34 microwave irradiation,35,36
solvent-free conditions,37–39 cyclodextrins (CDs),40 different bases in water,41 γ -alumina,42
and l-proline43 have been reported for the synthesis of 6-amino-4-alkyl/aryl-3-methyl-
2,4-dihydropyrano[2,3-c]pyrazole-5-carbonitriles. Recently, tetraethylammonium bromide
(TEABr) has emerged as mild, water-tolerant, eco-friendly and inexpensive catalyst. To
the best of our knowledge, quaternary ammonium salts, more specifically TEABr, have notbeen used as catalysts for the synthesis of pyrano[2,3-c]pyrazoles, and we decided to investigate
the application of TEABr as a catalyst for the synthesis of a series of pyrazole-fused
pyran derivatives via multi-component reactions
Description:
Organic Preparations and Procedures International, 45:429–436, 2013
Santhosh Kumar, G; Deepthi, K V B L; Rama, Krishna Sharma V(er publications, December , 2013)
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Abstract:
While channel coding is a standard method of improving a system’s energy efficiency in digital
communications, its practice does not extend to high-speed links. Increasing demands in network speeds
are placing a large burden on the energy efficiency of high-speed links and render the benefit of channel
coding for these systems a timely subject. The low error rates of interest and the presence of residual
intersymbol interference (ISI) caused by hardware constraints impede the analysis and simulation of coded
high-speed links. Focusing on the residual ISI and combined noise as the dominant error mechanisms, this
paper analyses error correlation through concepts of error region, channel signature, and correlation
distance. This framework provides a deeper insight into joint error behaviours in high-speed links, extends
the range of statistical simulation for coded high-speed links, and provides a case against the use of biased
Monte Carlo methods in this setting
Description:
International Journal of Enhanced Research in Science Technology & Engineering,
Vol. 2 Issue 12, December-2013, pp: (115-124)
Shahana, T K; Dr.Poulose Jacob, K; Dr.Sreela, Sasi(Cochin University of Science and Technology, October , 2008)
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Abstract:
The thesis focuses on efficient design methods and reconfiguration architectures suitable for higher performance wireless communication .The work presented in this thesis describes the development of compact,inexpensive and low power communication devices that are robust,testable and capable of handling multiple communication standards.A new multistandard Decimation Filter Design Toolbox is developed in MATLAB GUIDE environment.RNS based dual-mode decimation filters reconfigurable for WCDMA/WiMAX and WCDMA/WLANa standards are designed and implemented.It offers high speed operation with lesser area requirement and lower dynamic power dissipation.A novel sigma-delta based direct analog-to-residue converter that reduces the complexity of RNS conversion circuitry is presented.The performance of an OFDM communication system with a new RRNS-convolutional concatenated coding is analysed and improved BER performance is obtained under different channel conditions. Easily testable MAC units for filters are presented using Reed-Muller logic for realization.
Description:
Department of Computer Science,
Cochin University of Science and Technology
Remya, A R; Sreekumar, A(Cochin University of Science and Technology, June , 2014)
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Abstract:
Presently different audio watermarking methods are available; most of them
inclined towards copyright protection and copy protection. This is the key
motive for the notion to develop a speaker verification scheme that guar-
antees non-repudiation services and the thesis is its outcome.
The research presented in this thesis scrutinizes the field of audio water-
marking and the outcome is a speaker verification scheme that is proficient
in addressing issues allied to non-repudiation to a great extent. This work
aimed in developing novel audio watermarking schemes utilizing the fun-
damental ideas of Fast-Fourier Transform (FFT) or Fast Walsh-Hadamard
Transform (FWHT). The Mel-Frequency Cepstral Coefficients (MFCC) the
best parametric representation of the acoustic signals along with few other
key acoustic characteristics is employed in crafting of new schemes. The au-
dio watermark created is entirely dependent to the acoustic features, hence
named as FeatureMark and is crucial in this work.
In any watermarking scheme, the quality of the extracted watermark de-
pends exclusively on the pre-processing action and in this work framing and windowing techniques are involved. The theme non-repudiation provides
immense significance in the audio watermarking schemes proposed in this
work. Modification of the signal spectrum is achieved in a variety of ways
by selecting appropriate FFT/FWHT coefficients and the watermarking
schemes were evaluated for imperceptibility, robustness and capacity char-
acteristics. The proposed schemes are unequivocally effective in terms of
maintaining the sound quality, retrieving the embedded FeatureMark and
in terms of the capacity to hold the mark bits.
Robust nature of these marking schemes is achieved with the help of syn-
chronization codes such as Barker Code with FFT based FeatureMarking
scheme and Walsh Code with FWHT based FeatureMarking scheme. An-
other important feature associated with this scheme is the employment
of an encryption scheme towards the preparation of its FeatureMark that
scrambles the signal features that helps to keep the signal features unreve-
laed.
A comparative study with the existing watermarking schemes and the ex-
periments to evaluate imperceptibility, robustness and capacity tests guar-
antee that the proposed schemes can be baselined as efficient audio water-
marking schemes. The four new digital audio watermarking algorithms in
terms of their performance are remarkable thereby opening more opportu-
nities for further research.
Elastic properties of sodium doped Lithium potassium sulphate, LiK0.9Na0.1SO4, crystal has been studied by
ultrasonic Pulse Echo Overlap [PEO] technique and are reported for the first time. The controversy regarding
the type of crystal found while growth is performed at 35 °C with equimolar fraction of Li2SO4H2O, K2SO4
and Na2SO4 has been resolved by studying the elastic properties. The importance of this crystal is that it
exhibits pyroelectric, ferroelectric and electro optic properties. It is simultaneously ferroelastic and
superionic. The elastic properties of LiK0.9Na0.1SO4 crystal are well studied by measuring ultrasonic velocity
in the crystal in certain specified crystallographic directions and evaluating the elastic stiffness constants,
compliance constants and Poisson’s ratios. The anisotropy in the elastic properties of the crystal are well
explained by the pictorial representation of the surface plots of phase velocity, slowness and linear
compressibility in a-b and a-c planes.
Vimala,George; Jacob, Philip(Department of Electronics, October , 2005)
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Abstract:
The present work is an attempt to probe the elastic properties in some dielectric ceramics, by using ultrasonic pulse echo overlap technique. The base Ba6-xSm8+2xTi18O54 and Ca5Nb2TiO12 are very important dielectrics ceramics used for microwave communication as well as for substrate materials. Ultrasonic is one of the most widely used and powerful techniques to measure elastic properties of solids. The ultrasonic technique is nondestructive in nature and the measurements are relatively straightforward to perform. One unique advantantage of the ultrasonic technique is that both static and dynamic properties can be measured simultaneously. The velocity and attenuation coefficients of the ultrasonic waves propagating through a medium are related to the microscopic structure of the material and they provide valuable information about the structural changes in the system. Among the various ultrasonic techniques, the pulse echo overlap method is the most accurate and precise one. In the present case the decreased elastic properties of Cas-XMg,Nb2TiO12 and Cas-,ZnNb2TiO12 ceramics can be attributed to their mixture phases beyond x = 1. Moreover, the abrupt change in elastic properties observed for x >1 can also be correlated to the structural transformation of the materials from their phase pure form to mixture phases for higher extent of substitution of the concerned material . Ca4(ANb2Ti)012 (A = Mg, Zn) is the strongest compound with the maximum values for elastic properties . This could be due to the possible substitution of Mg/Zn ions with lesser radius [25] than Ca2+ in perovskite B-site of Ca(Cali4Nb2i4Tili4) O3 material to contribute more ordering and symmetry to the system [20]. All other compositions (x > 1) contain mixed-phases and for such mixed-phase samples, the mechanical properties are difficult to explain.
The aim of the study was to investigate the relevance of e—learning in continuing education of
library professionals in the universities in Kerala. /55 part of a survey of library professionals in the
seven major Universities in Kerala to find their continuing education needs, it was found that
majority of the library professionals attend continuing education programmes (CEP) to be trained
in the latest technologies. Internet resources were the preferred mode of information source by
38.9 per cent of the library professionals. The importance of continuing education in developing
the competencies of library professionals is also stressed
Description:
E-Resources and E-Learning:Challenges and Opportunities ,University of Calicut
Santhosh Kumar, G(Cochin University of Science And Technology, June 23, 2010)
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Abstract:
Semantic Web: Software agents on the Semantic Web may use commonly agreed service
language, which enables co-ordination between agents and proactive delivery of learning
materials in the context of actual problems. The vision is that each user has his own
personalized agent that communicates with other agents.
Rajeev, Kumar K; Dr.Sathianandan, K(Cochin University of Science and Technology, June 20, 1989)
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Abstract:
A brief account of the several methods used for the production of thin films is presented in this Chapter. The discussions stress on the important methods used for the fabrication of a-si:H thin films. This review' also reveals ‘that almost all the general methods, like vacuum evaporation, sputtering,
glow discharge and even chemical methods are currently employed for the production of a-Si:H thin films. Each method has its own advantages and disadvantages. However, certain methods are generally preferred. Subsequently a detailed account of the method used here for the preparation of amorphous silicon thin films and their hydrogenation is presented. The metal chamber used for the electrical and dielectric measurements is also described. A brief mention is made-on the electrode
structure, film area and film geometry.
Description:
Division of Thin Film, Department
of Physics, Cochin University of Science and Technology
Jayaraj, M K(Institute of Materials Engineering Australasia Ltd, 2005)
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Abstract:
ZnGa2O4 spinel is a promising new UV transparent electronic conductor. Enhancing the electrical conductivity of this
potential oxide phosphor can make it a promising transparent conducting oxide. In this paper, we have investigated the
effects of processing and doping on the conductivity of semiconducting ZnGa2O4, particularly thin films. Crystalline
zinc gallate thin films have been deposited on fused quartz substrates employing the pulsed laser deposition (PLD)
technique at room temperature for an oxygen partial pressure of 0.1 Pa (0.001mbar). The films were found to be UV
transparent, the band gap of which shifted to 4.75eV on hydrogen annealing. The band gap of the oxygen stoichiometric
bulk powder samples (4.55eV) determined from diffuse reflection spectrum (DRS) shifted to 4.81eV on reduction in a
hydrogen atmosphere. The electrical conductivity improved when Sn was incorporated into the ZnGa2O4 spinel. The
conductivity of ZnGa2O4:Sn thin films was further improved on reduction.