Radha Devi, A; Dr.Kurian, C V(Cochin University Of Science And Technology, August , 1983)
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Abstract:
Cumacea plays an important role in the marine environment as food for man and comercially important species of fishes . Hence it is desirable to have a better knowledge of the taxonomy, ecology, biology and distribution of the various species of Cumacea. The present work is directed towards the study of the above aspects
Description:
School Of Marine Sciences,Cochin University Of Science And Technology
Pradeep Chandran, C; V P N Nampoori; Radhakrishnan, P(Cochin University of Science and Technology, January 10, 2016)
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Abstract:
We live in an Information age, which is marked by the onset of digital
revolution during or after the latter half of the 20th century. In this era, we saw
sweeping changes in digital computing and communication technology. We largely
depend on electronics and photonics for hardware requirements to aid this
technology. With the assistance of modern technology, electronic devices have
become an indispensable tool in our everyday life.
Inorganic semiconductor materials like silicon and gallium arsenide have been
exploited for the on-growing demands of digital revolution. Fifty years of continuous
research and technological advancements have pushed these materials to their
theoretical efficiency limit. On the other hand, the rapid advancement in technology
has created a huge electronic waste which pose a threat to the environment. The
scarcity of inorganic materials such as gallium and indium is an alarming factor and it
is estimated that these will run out completely in the next 20 years. The availability of
new suitable materials is crucial for the development of semiconductor technology.
With much promise of delivering low-cost and energy efficient materials, organic
semiconductors such as conjugated polymers and small molecules have opened up
new avenues for research. Despite the intense effort by scientists and researchers, the
performance and stability of organic devices have taken a back seat. Therefore an
immediate large-scale replacement of inorganic components by organic counterparts
are not foreseen in the near future. Although research is underway to improve the
performance of organic materials, it is important to constantly search for new
materials.Nature is a big treasure-trove of successfully conducted experiments by
natural selection. Inspired by its apparent simplicity and actual complexity,
researchers look out for natural materials or synthetic materials mimicked from
natural models, systems or elements. Bio-inspired photonics use natural design as
their inspiration to solve human problems and channel these solutions in new
directions. It is promising that natural and nature-inspired materials can achieve the
ambitious goal of ‘green’ technology for sustainable future.
Sandhya, R; Dr.Prathapan, S(Cochin University Of Science And Technology, November 11, 2013)
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Abstract:
the thesis entitled “STUDIES
ON DEVELOPING A FACILE ROUTE FOR THE SYNTHESIS OF
HIGHLY SUBSTITUTED QUINOLINE AND INDOLE
DERIVATIVES” portrays our attempt to revisit the mechanism of 1,3-
dipolar additions with a view to establishing whether it follows a
concerted pathway or a stepwise reaction sequence through the formation
of a zwitterionic intermediate, which will definitely contribute to the better use of this technique. Furthermore, we propose to develop novel
routes for the synthesis of quinoline and indole derivatives with predefined
substitution pattern.
The thesis is devided into four chapters
Description:
Department of Applied Chemistry, Cochin
University of Science and Technology
Sarun, P M; Dr.Syamaprasad,U(National lnstitute for Interdisciplinary Science and Technology, June , 2010)
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Abstract:
The objective of the present work is to study the effect of rare-earth (RE)
doping on the superconducting properties of (Bi,Pb)-2212 system and to develop
novel superconductors in the system with improved properties, especially,
the self- and in-field critical current densities so as to use them for practical
applications. This dissertation describes a range of findings in Bi-based
superconductor using the cationic substitution of rare earth (RE) elements.
Most of the experiments reported here take advantage of the difference in the
valency and ionic radii of dopant and doping site.
The main objective of the study was primarily to determine the effect of hydrographical parameters especially nutrients which were supplied externally to the seawater while culturing the diatom Chaetoceros calcitrans, under laboratory conditions, and to determine its optimum concentration for ideal growth of the culture, in such a condition of increased rate of pollution due to the industrialization and effluents. Also an attempt was made to study the possible correlation of diatom abundance in the South west Coast of India with the landings of the pelagic fishery resources, especially sardine, mackerel and anchovy, since these fishes are largely diatom feeders. Positive correlation was found between the diatoms and pelagic fish landings of Thalassery and Vizhinjam area while at Cochin there was less significant correlation between the two variables
Mohanan, Choran; Dr.Jyoti, Sharma K(Cochin University of Science And Technology, May , 1994)
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Abstract:
Bamboos are vulnerable to various diseases which affect them in
nurseries, plantations as well as in natural stands. In India, rot and
blight of emerging culms have already been identified as the limiting
factor of the bamboo production in many bamboo growing areas,
especially in the coastal belts of Orissa (Jamaluddin et a1., 1992).
Similarly, foliage blight and rust have been recorded to pose threat
to nursery as well as outplanted seedlings which are in the early
establishnent phase (Bakshi et a1., 1972; Harsh et a1., 1989). With
the increased emphasis and priority on raising multipurpose tree
species, large—scale planting of bamboos has been initiated recently
in the State. Limited experience in raising the bamboo seedlings
together with the lack of information on bamboo diseases and their
control measures often resulted in partial to complete failure of many
nurseries. Also, poor handling of bareroot seedlings for outplanting
affected seriously the planting programme. This was clearly reflected
by the large-scale nortality of outplanted young seedlings reported
from many plantations. So far, no systanatic attempt has been made to
study the diseases affecting bamboos in nurseries, plantations and
natural stands in the country. Hence, the present investigation was
taken up to conduct a systematic study of the diseases affecting
bamboos in Kerala.
Description:
Division of forest pathology, Kerala forest research institute
Subhash, Chander; Dr.Diwan, A D(Cochin University of Science and Technology, November , 1986)
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Abstract:
In the present study, the main emphasis was to find out it seasonal and ecosystem specific variations of calcium magnesium, phosphorus, copper and zinc in the water and the
sediment has any role to play in altering the concentration of these elements in different tissues of intermoult p.indicus as evidenced by the seasonal studies in the grow out
and the marine ecosystems
Description:
Centre of advanced studies in mariculture, Central marine fisheries research institute
Job,Kuriakose Aerankavil; Dr.Rani,Joseph(Cochin University of Science and Technology, November 30, 1996)
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Abstract:
The distribution of curing agents and fillers in the
constituents of an elastomer blend is an important factor
which determines the curing behaviour and vulcanizate
properties of the blend. The distribution of curatives and
fillers largely depends on the nature of elastomers. The
curatives tend to migrate preferentially to the rubber of
higher unsaturation and/or higher polarity, and reinforcing
fillers tend to get distributed in the low viscosity phase,
resulting in inferior mechanical properties of the blends.
The thesis suggests several methods for improving
mechanical properties of blends like NBR/butyl, NR/butyl,
NBR/EPDM and NR/.
Description:
Department of Polymer Science and Rubber
Technology, Cochin University of Science and Technology
Edwin, Xavier; Dr.Girijavallabhan,C P(Cochin University of Science & Technology, March , 1997)
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Abstract:
The present thesis is centered around the study of electrical and thermal
properties of certain selected photonic materials.We have studied the electrical conduction mechanism in various
phases of certain selected photonic materials and those associated with different phase
transitions occurring in them. A phase transition leaves its own impressions on the key
parameters like electrical conductivity and dielectric constant. However, the activation
energy calculation reveals the dominant factor responsible for conduction process.PA measurements of thermal diffusivity in certain other important photonic
materials are included in the remaining part of the research work presented in this
thesis. PA technique is a promising tool for studying thermal diffusivities of solid
samples in any form. Because of its crucial role and common occurrence in heat flow
problems, the thermal diffusivity determination is often necessary and knowledge of
thermal diffusivity can intum be used to calculate the thermal conductivity. Especially,knowledge of the thermal diffusivity of semiconductors is important due to its relation
to the power dissipation problem in microelectronic and optoelectronic devices which
limits their performances. More than that, the thermal properties, especially those of
thin films are of growing interest in microelectronics and microsystems because of the
heat removal problem involved in highly integrated devices. The prescribed chapter
of the present theis demonstrates how direct measurement of thermal diffusivity can be
carried out in thin films of interest in a simple and elegant manner using PA techniques.
Although results of only representative measurements viz; thermal diffusivity values in
Indium, Aluminium, Silver and CdS thin films are given here, evaluation of this
quantity for any photonic and / electronic material can be carried out using this
technique in a very simple and straight forward manner.
Description:
International School of Photonics,Cochin University of Science and Technology
Muraleedharan,Pillai S; Dr.Girijavallabhan,C P(Cochin University of Science And Technology, March , 1984)
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Abstract:
The subject of electroluminescence has currently acquired great importance because of its potential applications in display systems of a wide variety. A large number of scientists working in commercial, governmental as well as academic institutions all over the world are at present
engaged in the intense effort to develop new and efficient phosphor materials and electroluminescent devices. This thesis presents the work carried out by the author in this
field during the past few years. The studies discussed in this thesis are mostly confined to
the development of some new phosphor materials, their uses in powder and thin film electroluminescent devices and to their electrical and spectral characteristics. Care has been taken to bring' out the physics involved in all the above aspects of the phenomenon
Description:
Department of physics, Cochin University of Science And Technology
Kerala Varma, K; Dr.Kurup, P G(Cochin University of Science and Technology, April , 1989)
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Abstract:
The thesis focused Studies on Energy Exchange and Upper Ocean Thermal Structure in Arabian Sea and Heat Transport in Northern Indian Ocean. The present thesis is an attempt to understand the upper ocean thermal characteristics at selected areas in the western and eastern
Arabian Sea in relation to surface energy exchange and dynamics, on a climatological basis. It is also aimed to examine, the relative importance of different processes in the evolution of SST at the western and eastern Arabian Sea. Short-term variations of energy exchange and upper ocean
thermal structure are also investigated. Climatological studies of upper ocean thermal structure and surface energy exchange in the western and eastern parts of Arabian Sea bring out the similarities/differences and the causative factors for the observed features. Annual variation of zonally averaged heat advection in north Indian Ocean shows that maximum export of about
100 W/m2 occurs around 15ON during southwest monsoon season. This is due to large negative heat storage caused by intense upwelling in several parts of northern Indian Ocean. By and large, northern Indian Ocean is an area of heat export
Description:
Physical Oceanography and Meteorology Division, School of Marine Sciences, Cochin University of Science and Technology