Mathew, George; Dr.Karunakaran, V(Cochin University of Science And Technology, February , 1987)
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Abstract:
The present study is on the nature, problems and prospects of the handloom industry in Kerala. The problems of the industry are mostly in the nature of low earnings of the workers, underutilisation of the existing capacity and low profit in its various sectors. The majority of
the handloom co-operative societies are either dormant or facing liquidation. The income and employment of weavers are so pitiably low that they are living in utter poverty and starvation. Frequent price fluctuations of yarns, dyes and chemicals increase the cost of production and reduce the profitability. Consequently handloom fabrics are not able to compete with mill cloths and powerloom products. Accumulating the unsold stocks in the godowns of co-operative societies and with master weavers has become the practice of the day. Spinning mills in Kerala are producing only lower counts of yarns. S, handloom industry has to depend on textile mills in Tamil Nadu for higher counts of yarn. They create artificial scarcity and increase the prices exflorbitantly. Wage rates prevailing in Kerala are higher than those in Tamil Hadu. So rich master weavers are migrating to Tamil.Nadu and exporting the fabrics. under the label 'Kera1a Handlooms'. Governmental efforts to tackle the crisis by way of rebates and subsidies are found to be futile.
Description:
Department of applied economics, Cochin University of Science And Technology
Bright Singh, I S; Rosamma, Philip; Mohandas, A; Seena, Jose(Elsevier, August 31, 2010)
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Abstract:
Immortal cell lines have not yet been reported from Penaeus monodon, which delimits the prospects of
investigating the associated viral pathogens especially white spot syndrome virus (WSSV). In this context,
a method of developing primary hemocyte culture from this crustacean has been standardized by
employing modified double strength Leibovitz-15 (L-15) growth medium supplemented with 2% glucose,
MEM vitamins (1 ), tryptose phosphate broth (2.95 g l 1), 20% FBS, N-phenylthiourea (0.2 mM),
0.06 lgml 1 chloramphenicol, 100 lgml 1 streptomycin and 100 IU ml 1 penicillin and hemolymph
drawn from shrimp grown under a bio-secured recirculating aquaculture system (RAS). In this medium
the hemocytes remained viable up to 8 days. 5-Bromo-20-deoxyuridine (BrdU) labeling assay revealed its
incorporation in 22 ± 7% of cells at 24 h. Susceptibility of the cells to WSSV was confirmed by immunofluoresence
assay using a monoclonal antibody against 28 kDa envelope protein of WSSV. A convenient
method for determining virus titer as MTT50/ml was standardized employing the primary hemocyte culture.
Expression of viral genes and cellular immune genes were also investigated. The cell culture could
be demonstrated for determining toxicity of a management chemical (benzalkonium chloride) by determining
its IC50. The primary hemocyte culture could serve as a model for WSSV titration and viral and
cellular immune related gene expression and also for investigations on cytotoxicity of aquaculture drugs
and chemicals
Description:
Journal of Invertebrate Pathology 105 (2010) 312–321
Retting.of coconut husk is one of the major problems of pollution in the estuaries
(Kayals) of Kerala. This paper discusses the salient features associated with the variation
in gross and net primary productivity values in the Kadinarnkularn Kayal based on
lortnightlydala from twosclected stations frorn Octobcr1987 to September 1988.The gross
primary productivity value in the surface water ranged from 0.06 to 0.29gC/m3/day at
Station Iand from 0.06 to 1.49gC/rn3/dayatstation II. In the bottom wateritrangcdfrorn
oto 0.21 gC/m2/ day at station I whereas that at station II from 0.03 to 1.41gC/m3j day.
The net productivity in the surface water at station I varied from 0 to 024 gC/m Iday
Whereas that atstation II varied from 0.02to 1.44gC/m3Iday.AI the bottomwaterilvaried
from ato 0.19gC/m3/ day at station I and from 0.01 to 1.21gC/m3/day at station II. The
monsoon period showed the highest mean seasonal value at stations I and II. The total
depletion of dissolved oxygen giving rise to anoxic condition coupled with the production
of large quantities of hydrogen sulphide was found to be detrimental to the gross and net
productivity values in the retting zone
Francis Jacob, K; Dr.Mohanan, P(Cochin University of Science and Technology, June , 2008)
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Abstract:
The thesis is the outcome of the exhaustive theoretical and experimental investigations performed on Printed Monopole Antennas loaded with different geometries .The work presented in this thesis describes the development of a 3D- FDTD(Finite Difference Time Domain) Modeller using MATLAB for the numerical computation of the radiation characteristics of the antenna. The predicted results are verified experimentally and also through simulation using Ansoft HFSS.The effect of top loading of the monopole with different geometries ,the dimensions of the loading patch and ground plane and the material parameters of the dielectric substrate upon the radiation performance of the antenna is studied in detail. Optimized Printed Monopole antennas suitable for Ultra Wide Band (UWB) applications have been developed.
Description:
Department of Electronics, Cochin University of
Science and Technology
Markose, K T; Dr.Wilson, P R; Dr.Sankaranarayanan, K C(Cochin University of Science and Technology, April , 2003)
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Abstract:
The study is confined to non-mechanised private and cooperative
granite quarries in Thrissur district. There are 90 non -mechanised
quarries in Thrissur district. Data were collected for the period from 1994-'95 to 1999-2000. 315* March of every year was considered as the closing date of the year. It envisages an analysis of various problems connected with quarrying operations, financial analysis, cost analysis, demand and supply position of quarry products and socio-economic background of workers. It also suggest some measures to improve the working conditions of granite quarrying.
Description:
School of Management Studies, Cochin University of Science & Technology
Jacob,M J; Dr.Krishnamoorthy,A(Cochin University Of Science And Technology, 1987)
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Abstract:
In this thesis we attempt to make a probabilistic
analysis of some physically realizable, though complex,
storage and queueing models. It is essentially a mathematical
study of the stochastic processes underlying
these models. Our aim is to have an improved understanding
of the behaviour of such models, that may widen their
applicability. Different inventory systems with randon1
lead times, vacation to the server, bulk demands, varying
ordering levels, etc. are considered. Also we study some
finite and infinite capacity queueing systems with bulk
service and vacation to the server and obtain the transient
solution in certain cases. Each chapter in the thesis is
provided with self introduction and some important references
Description:
Department of Mathematics and Statistics
Cochin University of Science and
Technology
Hatha, A A M; Mujeeb Rahiman, K M; Yousuf, Jesmi; Ambat,Thomas P(Blackwell Publishing Ltd, 2010)
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Abstract:
Eight hundred and eighty-¢ve strains of bacterial isolates
fromvarious samples associatedwith the natural
habitat ofMacrobrachiumrosenbergii were screened
for their probiotic potential. Two putative probionts
namely Bacillus NL110 and Vibrio NE17 isolated from
the larvae and egg samples, respectively, were selected
for experimental studies and were introduced
to the juveniles of M. rosenbergii (0.080 0.001g)
through di¡erent modes such as through feed, water
and both. The probiotic potential of the above bacteria
in terms of improvements inwater quality, growth,
survival, speci¢c growth rate (SGR), feed conversion
ratio and immune parameters was evaluated. The
treatment groups showed a signi¢cant improvement
in SGR and weight gain (Po0.001). Survival among
di¡erent treatment groups was better than that in
the control group. There were also signi¢cant improvements
in the water quality parameters such as
the concentration of nitrate and ammonia in the
treatment groups (Po0.05). Improvements in immune
parameters such as the total haemocyte count
(Po0.05), phenoloxidase activity and respiratory
burst were also signi¢cant (Po0.001). It is concluded
that screening of the natural micro£ora of cultured
¢sh and shell¢sh for putative probionts might yield
probiotic strains of bacteria that could be utilized for
an environment-friendly and organic mode of aquaculture.
Hatha, A A M; Mujeeb Rahiman, K M; Yousuf, Jesmi; Ambat,Thomas P(Blackwell Publishing Ltd, 2010)
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Abstract:
Eight hundred and eighty-¢ve strains of bacterial isolates
fromvarious samples associatedwith the natural
habitat ofMacrobrachiumrosenbergii were screened
for their probiotic potential. Two putative probionts
namely Bacillus NL110 and Vibrio NE17 isolated from
the larvae and egg samples, respectively, were selected
for experimental studies and were introduced
to the juveniles of M. rosenbergii (0.080 0.001g)
through di¡erent modes such as through feed, water
and both. The probiotic potential of the above bacteria
in terms of improvements inwater quality, growth,
survival, speci¢c growth rate (SGR), feed conversion
ratio and immune parameters was evaluated. The
treatment groups showed a signi¢cant improvement
in SGR and weight gain (Po0.001). Survival among
di¡erent treatment groups was better than that in
the control group. There were also signi¢cant improvements
in the water quality parameters such as
the concentration of nitrate and ammonia in the
treatment groups (Po0.05). Improvements in immune
parameters such as the total haemocyte count
(Po0.05), phenoloxidase activity and respiratory
burst were also signi¢cant (Po0.001). It is concluded
that screening of the natural micro£ora of cultured
¢sh and shell¢sh for putative probionts might yield
probiotic strains of bacteria that could be utilized for
an environment-friendly and organic mode of aquaculture
Bright Singh, I S; Ajitha, S; Sridhar, N; Sridhar, M; Varghese, V(Asian Fisheries Society, March 2, 2004)
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Abstract:
Cell free extracts of four strains of Lactic acid bacteria (LAB) viz. Lactobacillus. acidophilus,
Streptococcus.cremoris, Lactobacillus bulgaricus –56 and Lactobacillus bulgaricus –57 inhibited
growth of Vibrio alginolyticus in nutrient broth. The antagonism of LAB to Vibrio
alginolyticus was further confirmed by streak plating wherein suppression of growth of Vibrio
was obtained.
Juveniles of Penaeus indicus (average weight 0.985 ± 0.1 g) on administering orally a
moist feed base containing 5 × 106 cells·g of the four LAB probionts for a period of four weeks
showed better survival (56 to 72%) when challenged with V. alginolyticus by intra-muscular
injection of 0.1 ml containing 3 × 109 cells·ml. Animals maintained on a diet devoid of bacterial
biomass exhibited 80% mortality. No external or internal pathological changes were observed
in shrimp fed with the LAB incorporated diets. Results showed inhibition of V.
alginolyticus by LAB and stimulation of the non-specific immune response resulting in resistance
to disease in the shrimp fed on LAB incorporated diets.
Description:
Asian Fisheries Science 17 (2004): 71-80
Asian Fisheries Society, Manila, Philippines
Jos, C A; Dr.Pylee,M V(Cochin University of Science And Technology, 1978)
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Abstract:
This study is directed to examine how far price fluctuations in pepper can be controlled in the Indian context so as to have a reasonable and stable income for the primary producers which will ensure an adequate ‘encouragement for higher production and better export earnings. In a study of the methods of controlling violent price fluctuations a important question is that whether the present system of management of supply is satisfactory or not. It is more so when the demand
is likely to be sanimlatsd by the importers and wholesalers of the foreign countries. Though pepper is the most important of all the spices gross in India, little work has been done so far to study the problems and prospects of this commodity.
Description:
School of management studies, Cochin University of Science And Technology
Gopalakrishnan Nayar, K; Dr.Parameswaran, Nair N(Cochin University Of Science And Technology, January 3, 1987)
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Abstract:
The main objective of the study has been to
analyse the marketing problems of Indian cardamom at home
and abroad and examine possible courses of action which
would lead to increased consumption of cardamom, both
within India and abroad. This has been done in the context
of the anticipated increases in the Indian and world
supply of cardamom. Field studies were undertaken to understand
the cost of production of cardamom and cost of export.
This study was also directed at examining how
far price fluctuations in cardamom can be controlled in
the Indian context, so as to have a reasonable and stable
income for primary producers which will ensure adequate
encouragement for higher production and better export
earnings.
Description:
School of Management Studies, Cochin University
of Science and Technology
Merlin,Joseph; Meera Bai,M(Department of Applied Economics, Faculty of Social Sciences, 2002)
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Abstract:
The overall objective of the study is to examine the problems and prospects of the tea on industry in Kerala. The specific objectives are to trace the historical evolution of the tea plantation industry in India with special reference to Kerala and to study the performance of tea plantation industry in Kerala. In order to analyse the growth performance of tea plantation industry in Kerala in a comparative perspective, growth rates for the neighbouring states of Karnataka and Tamilnadu are estimated along with the National, South Indian and North Indian estimates. Tea plantation industry is a labour intensive activity. Productivity has been low primarily because of the over aging. In all the factories visited only Black tea is produced. In factories outmoded machines which installed years ago is still used which will increase the cost of production. The major problem is high cost of production and low price realization. The workers are found to be not satisfied with their working conditions- long journey to work place, absence of resting places, latrine facilities etc. and also the problems arising from dust in the factory. At a macro level the tea plantation industry has been facing the adverse impacts of globalisation and trade liberalization. There is only one solution to this problem that is to improve the competitiveness in production of raw leaf and manufacturing of tea. Government has a very important role with specification of strict quality control
K G Nair ; P R S Pillai ; Vasudevan, K; Mathew, K T; Mohanan, P; Aanandan,C K(Cochin University of Science and Technology, November 29, 2008)
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Abstract:
In this paper we have investigated the effect of cavity diameter and wall height on resonance and radiation characteristics of a circular microstrip patch antenna. Experiments were conducted using a fabricated prototype placed inside a cylindrical cavity. The results were compared and verified with simulated data obtained using an electromagnetic simulator. About 9.6 to 10.5 dBi peak gain was obtained from measured and simulated data
Anantharaman, M R; Solomon, M A; Joy, P A; Philip, Kurian(Taylor & Francis, August 16, 2010)
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Abstract:
Rubber ferrite composites (RFC) are magnetic polymer composites and have a
variety of applications as flexible magnets, pressure=photo sensors, and microwave
absorbers. The mouldability into complex shapes is one of the advantages of these
magnetic elastomers. They have the potential of replacing the conventional ceramic
materials, due to theire flexible nature. In the present study, the incorporation
of pre-characterized hexagonal ferrites, namely barium ferrite (BaFe12O19), into
natural rubber matrix is carried out according to a suitable recipe for various
loadings of the filler. The processability of these compounds was determined by
evaluating the cure characteristics: scorch time, cure time, and minimum and
maximum torque. It has been found that the addition of magnetic fillers does not
affect the processability of the composites, whereas the physical properties are
modified. The magnetic properties of these composites containing various loadings
of the magnetic filler were also investigated. The magnetic properties of RFC can
be controlled by the addition of appropriate amount of the ferrite filler.
Description:
International Journal of Polymeric Materials, 53:565–575, 2004
Anantharaman, M R; Mohamed, E M; Malini, K A; Joy, P A; Kulkarni, S D; Date, S K; Kurian, P(Institute of Materials, published by Maney Publishing, March 2, 2002)
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Abstract:
Rubber ferrite composites have the unique advantage of mouldability, which
is not easily obtainable using ceramic magnetic materials. The incorporation
of mixed ferrites in appropriate weight ratios into the rubber matrix not only
modi es the dielectric properties of the composite but also imparts magnetic
properties to it. Mixed ferrites belonging to the series of Mn(1 – x )Znx Fe2O4
have been synthesised with diVerent values of x in steps of 0·2, using conventional
ceramic processing techniques. Rubber ferrite composites were prepared
by the incorporation of these pre-characterised polycrystallineMn(1 – x )Znx Fe2O4
ceramics into a natural rubber matrix at diVerent loadings according to a
speci c recipe. The processability of these elastomers was determined by investigating
their cure characteristics. The magnetic properties of the ceramic llers
as well as of the rubber ferrite composites were evaluated and the results were
correlated. Studies of the magnetic properties of these rubber ferrite composites
indicate that the magnetisation increases with loading of the ller without
changing the coercive eld. The hardness of these composites shows a steady
increase with the loading of the magnetic llers. The evaluation of hardness
andmagnetic characteristics indicates that composites with optimummagnetisation
and almost minimum stiVness can be achieved with a maximum loading
of 120 phr of the ller at x=0·4. From the data on the magnetisation of the
composites, a simple relationship connecting the magnetisation of the rubber
ferrite composite and the ller was formulated. This can be used to synthesise
rubber ferrite composites with predetermined magnetic properties
Description:
Plastics, rubber and composites,vol 31,issue 3,pp 106-113