Gopakumar, S D; Dr. Gopinathan, C P(Cochin University of Science & Technology, August , 2004)
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Abstract:
The present study is an attempt to standardize the environmental condition like pH, salinity and photoperiod, and also the feed for the maximum production of rotifers. Considering the deficiency of essential fatty acids in rotifers, enrichment experiments were carried out and fatty acids profile were analysed. Attempts were made to improve the production of clown fish (Amphiprion sebae) juveniles using enriched rotifers. Attempts were also made to rear various larval stages of Penaeus monodon with enriched rotifers as a substitute for Artemia nauplii.
Hamza, V.K.; Dr. Zakkariya, K.A.(Cochin University of Science and Technology, March 9, 2014)
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Abstract:
Earlier studies on measurement of customer satisfaction are based on either transaction specific or overall approaches. The transaction specific approach evaluates customer satisfaction with single components in the whole purchase process but the overall satisfaction was based on all the encounters or experiences to the customer throughout the purchase process. Consumers will comment on particular events of their purchase process when asked about transaction-specific satisfaction and they will comment their overall impression and general experiences in overall satisfaction (Bitner & Hubbert 1994) Through a critical review on the literature, it has been identified a new approaches to customer satisfaction, say, cumulative approaches that can be more useful than overall and transaction specific approaches for strategic decision making (Fornell et al 1996). The cumulative approach to customer satisfaction doesn’t study earlier due to the difficulty in operationalization of the concept. But the influencers of customer satisfaction are context specific and the prevailing models doesn’t give the sources of variations in the satisfaction, the importance of cumulative approaches to customer satisfaction has emerges that lights to a new research. The current study has focused to explore the influencers of overall customer satisfaction to form individual elements that can be used to identify the cumulative customer satisfaction.
Priya Rajan, S; Dr.Mohanan, P V(Cochin University Of Science And Technology, May , 2013)
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Abstract:
The scope of the work was to synthesis few biologically active derivatives
of curcumin. The derivatives were prepared by altering the keto-enol centre of
curcumin by various reagents. This particular reaction centre for preparing
derivative was selected keeping in mind the controversy regarding the major site
responsible for antioxidant mechanism of curcumin. Most of the mechanistic study
done earlier was by varying the constituents in one or both of the phenol ring
present in the curcumin. The alterations at the keto-enol moiety may throw an
insight into the role of the diketo moiety towards the antioxidant mechanism. Since
recently curcumin has been suggested as a chemotherapeutic agent for various
ailments, we also decided to check the DNA intercalating property of the
derivatives synthesised.
Description:
Department of Applied Chemistry
Cochin University of Science and Technology
Blends of styrene butadiene rubber (SBR) with maleic anhydride
grafted whole tire reclaim (MA-g-WTR) have been prepared and the
cure and mechanical properties have been studied with respect to the
reclaim content. The grafting was carried out in the presence of
dicumylperoxide (DCP) in a Brabender Plasticorder at 150'C. The
presence of anhydride group on the WTR was confirmed by infrared
spectrometry (IR) study. The properties were compared with those of
the blends containing unmodified WTR. Though the cure time was marginally higher, the mechanical properties of the blends containing
grafted WTR were better than that of the unmodified blends.
Anantharaman, M R; Mathew, George; Philip, Kurian(Wiley Subscription Services, Inc., A Wiley Company, September 22, 2010)
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Abstract:
Ultra fine nickel ferrite have been synthesized
by the sol-gel method. By heat treating different portions
of the prepared powder separately at different
temperatures, nano-sized particles of nickel ferrite with
varying particle sizes were obtained. These powders were
characterised by the X-ray diffraction and then incorporated
in the nitrile rubber matrix according to a specific
recipe for various loadings. The cure characteristics and
the mechanical properties of these rubber ferrite composites
(RFCs) were evaluated. The effect of loading and the
grain size of the filler on the cure characteristics and tensile
properties were also evaluated. It is found that the
grain size and porosity of the filler plays a vital role in
determining the mechanical properties of the RFCs
Sunil,K Narayanankutty(Taylor & Francis, November 13, 2000)
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Abstract:
Cure characteristics and mechanical properties of short nylon fiber reinforced
acrylonitrile butadiene rubber-reclaimed rubber composites were studied. Minimum
torque, (maximum-minimum) torque and cure rate increased with fiber
concentration. Scorch time and cure time decreased by the addition of fibers.
Properties like tensile strength, tear strength, elongation at break, abrasion loss
and heat build up were studied in both orientations of fibers. Tensile and tear
properties were enhanced by the addition of fibers and were higher in the longitudinal
direction. Heat build up increased with fiber concentration and were
higher in the longitudinal direction. Abrasion resistance was improved in presence
of short fibers and was higher in the longitudinal direction. Resilience increased
on the introduction of fibers. Compression set was higher for blends.
Sunil,K Narayanankutty(OPA (Overseas Publishers Association), January 7, 1997)
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Abstract:
Cure characteristics of short polyester fiber-polyurethane composites with respect to
different bonding agents (MD resins) based on 4, 4' diphenylmethanediisocyanate (MDI)
and various diols like propyleneglycol (PG), polypropyleneglycol (PPG) and glycerol
(GL) were studied. Tmax. - Tmin. of composites having MD resin were found to be
higher than the composite without MD resin. Minimum torque and Tmax. - Tmin.,
scorch time and optimum cure time were increased with the increase of MDI equivalence.
Optimum ratio of MDI / -of in the resin was found to be within the range of
1-1.5. It was observed from the cure characteristics that for getting better adhesion
between short polyester fiber and the polyurethane matrix the best choice of MD resin
was one based on MDI and 1:1 equivalent mixture of polypropyleneglycol and glycerol.
Anantharaman, M R; Prema, K H; Philip, Kurian; Vijutha, Sunny(Taylor & Francis, 2010)
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Abstract:
Rubber ferrite composites were prepared by incorporating nickel ferrite in a neoprene
rubber matrix. Kinetics of the cure reaction were determined from the rheometric torque
values and found to follow first-order kinetics. Analysis of the swelling behavior of
the rubber ferrite composites in toluene elucidates the mechanism of solvent penetration
and sorption characteristics, and reveals the extent of the physical interaction of
the ferrite particles with the neoprene rubber matrix. Mechanical properties of rubber
ferrite composites were determined, which support the reinforcing nature of nickel ferrite
to the neoprene rubber matrix. These results show that magnetic composites with
the required processing safety can be prepared economically by incorporating higher
amounts of nickel ferrite in the neoprene rubber matrix
Description:
International Journal of Polymeric Materials, 59:173–183, 2010
Rani, Joseph; Dr.Joseph,Francis D(Cochin University of Science and Technology, December , 1987)
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Abstract:
There are a large number of commercial examples and property advantages of immiscible elastomer blends.73 Blends of natural rubber (NR) and polybutadiene (BR) have shown various
advantages including heat stability, improved elasticity and abrasion resistance. Ethylene-propylene-diene-rubber (EPDM) blended with styrene-butadiene rubber (SBR) has shown improvements in ozone and chemical resistance with better compression set properties. Blends of EPDM and nitrile rubber (NBR) have been cited as a compromise for obtaining moderate oil and ozone resistance with improved low temperature properties. Neoprene (CR)/BR blends offer improved low temperature properties and abrasion resistance with better processing characteristics etc. However, in many of the commercial two-phase elastomer blends, segregation of the crosslinking agents, carbon black or antioxidants preferentially into one phase
can result in failure to attain optimum properties. Soluble and insoluble compounding ingredients are found to be preferentially concentrated in one phase. The balance of optimum curing of both phases therefore presents a difficult problem. It has been the aim of this study to improve the
performance of commercially important elastomer blends such as natural rubber (NR)/styrene-butadiene rubber (SBR) and natural rubber/polybutadiene rubber (BR) by industrially viable procedures
Description:
Department Of Polymer Science And Rubber technology
Bijoy, Nandan S(The University of Waikato, Private Bag 3105, Hamilton, New Zealand, November 4, 2008)
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Abstract:
The South West (S.W.) coast of India is blessed with a series of wetland systems popularly
referred to as backwaters covering a total area of 46128.94 ha. These backwaters are
internationally renowned for their aesthetic and scientific values including being a repository
for several species fish and shell fishes. This is more significant in that three wetlands
(Vembanad, Sasthamcotta and Ashtamudi) have recently been designated as Ramsar sites of
international importance. Thirty major backwaters forming the crux of the coastal wetlands
form an abode for over 200 resident or migratory fish and shellfish species. The fishing
activities in these water bodies provide the livelihood to about 200,000 fishers and also provide
full-time employment to over 50,000 fishermen. This paper describes the changes on the
environmental and biodiversity status of selected wetlands, during 1994-2005 period. The pH
was generally near neutral to alkaline in range. The salinity values indicated mixohaline
condition ranging from 5.20-32.38 ppt. in the 12 wetlands. The productivity values were
generally low in most of the wetlands during the study, where the gross production varied
from 0.22 gC/m3/day in Kadinamkulam to 1.10 gC/m3/day in the Kayamkulam. The diversity
of plankton and benthos was more during the pre-monsoon compared to the monsoon and
post-monsoon periods in most of the wetlands. The diversity of plankton and benthos was
more during the pre-monsoon compared to the monsoon and post-monsoon periods in most of
the wetlands. The average fish yield per ha. varied from 246 kg. in Valapattanam to 2747.3 kg.
in Azhikode wetland. Retting of coconut husk in most of the wetlands led to acidic pH
conditions with anoxia resulting in the production of high amounts of sulphide, coupled with
high carbon dioxide values leading to drastic reduction in the incidence and abundance of
plankton, benthic fauna and the fishery resources. The major fish species recorded from the
investigation were Etroplus suratensis, E. maculatus, Channa marulius, Labeo dussumieri, Puntius
sp. Lutianus argentimaculatus, Mystus sp., Tachysurus sp. and Hemiramphus sp. The majority of
these backwaters are highly stressed, especially during the pre monsoon period when the
retting activity is at its peak. The study has clearly reflected that a more restrained and cautious
approach is needed to manage and preserve the unique backwater ecosystems of South-west
India
Description:
Proceedings of the Conserv-Vision Conference, University of Waikato, 2-4 July 2007
Vijayakumar, V; Dr.Leelakrishnan, P(Cochin University of Science and Technology, August 17, 1999)
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Abstract:
The customary laws of Union Territory of Lakshadweep islands are a
challenge for judicial institution as well as administrative machinery. With the
peculiarities of socio-legal institutions, Lakshadweep system stands apart from the
mainstream of legal systems in India. How far do the charismatic modernisation
trends flowing into the Lakshadweep society affect the people already protected
by the uncodified laws of the past? Many are the issues at this stage. This study
analyses them. It examines the growth, evolution and development of the legal
system in the islands vis-a-vis the administrative mechanism imposed by the
mainland ethos and culture.
Description:
School of Legal Studies, Cochin University of Science and Technology.
Jazeela, M; Dr.Sankaranarayanan, K C(Cochin University of Science and Technology, January 9, 2001)
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Abstract:
As of 1999. the state of Kerala has 3210 offices of scheduled
commercial banks (SCBS). In all, there are 48 commercial banks
operating in Kerala, which includes PSBs, OPBs, NPBS. FBs, and
Gramin Banks. The urban areas give a complete picture of the
competition in the present day banking scenario with the presence
of all bank groups. Semi-urban areas of Kerala have 2196 and urban
areas have 593 as on March 1995.“ The study focuses on the
selected segments ofthe urban customers in Kerala which is capable
of giving the finer aspects of variation in customer behaviour in the
purchase of banking products and services. Considering the
exhaustive nature of such an exercise, all the districts in the state
have not been brought under the purview of the study. Instead. three
districts with largest volume of business in terms of deposits,
advances, and number of offices have been short listed as
representative regions for a focused study.
The study focuses on the retail customer segment and their
perceptions on the various products or services offered to them. Non
Resident Indians (NRIs), and Traders and Small—ScaIe Industries
segments have also been included in the study with a view to obtain
a comparative picture with respect to perception on customer
satisfaction and service quality dimensions and bank choice
behaviour. The research is hence confined to customer behaviour
and the implications for possible strategies for segmentation within
the retail segment customers
Description:
School of Management Studies, Cochin University of Science And Technology
Rajasree, K; Ravi Kumar, A V; Radhakrishnan, P; Nampoori, V P N; Vallabhan, C P G(Springer, April , 1992)
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Abstract:
Photothermal deflection technique was used for determining the laser damage threshold of polymer samples of teflon (PTFE) and nylon. The experiment was conducted using a Q-switched Nd-YAG laser operating at its fundamental wavelength (1-06μm, pulse width 10 nS FWHM) as irradiation source and a He-Ne laser as the probe beam, along with a position sensitive detector. The damage threshold values determined by photothermal deflection method were in good agreement with those determined by other methods.
Ramachandran, A; Jameela Beevi, K S(April 30, 2003)
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Abstract:
While conducting surveys for potential ornamental fishes in the fresh water bodies
of the river Periyar, three specimens of Danio fraseri Hora and Mukerji, were collected from a
stream joining to the river Periyar, at Desom, near Alwaye on 6 October 2001. It is the only
species so far known under the genus Danio with a hypertrophied lower lip forming a loose
flap along the lower jaw. This is a new locality record for Kerala and southern Western
Ghats.
Sindhu, M S; Dr.Kannan, B(Cochin University of Science And Technology, July 23, 2013)
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Abstract:
In the current study, epidemiology study is done by means of
literature survey in groups identified to be at higher potential for DDIs as
well as in other cases to explore patterns of DDIs and the factors affecting
them. The structure of the FDA Adverse Event Reporting System (FAERS)
database is studied and analyzed in detail to identify issues and challenges
in data mining the drug-drug interactions. The necessary pre-processing
algorithms are developed based on the analysis and the Apriori algorithm is
modified to suit the process. Finally, the modules are integrated into a tool to identify DDIs. The results are compared using standard drug interaction
database for validation. 31% of the associations obtained were identified to
be new and the match with existing interactions was 69%. This match
clearly indicates the validity of the methodology and its applicability to
similar databases. Formulation of the results using the generic names
expanded the relevance of the results to a global scale. The global
applicability helps the health care professionals worldwide to observe
caution during various stages of drug administration thus considerably
enhancing pharmacovigilance
Description:
Department of Computer Applications, Cochin
University of Science and Technology
Varghese, Paul; Dr.Poulose Jacob, K(Cochin University of Science & Technology, April , 2003)
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Abstract:
The present research problem is to study the existing encryption
methods and to develop a new technique which is performance wise
superior to other existing techniques and at the same time can be very
well incorporated in the communication channels of Fault Tolerant
Hard Real time systems along with existing Error Checking / Error
Correcting codes, so that the intention of eaves dropping can be
defeated. There are many encryption methods available now. Each
method has got it's own merits and demerits. Similarly, many crypt
analysis techniques which adversaries use are also available.
Description:
Department of Computer Science, Cochin University of Science and
Technology