Sindhumol, S; Dr.Kannan, B(Cochin University Of Science And Technology, July 3, 2013)
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Abstract:
Magnetic Resonance Imaging (MRI) is a multi sequence medical imaging
technique in which stacks of images are acquired with different tissue
contrasts. Simultaneous observation and quantitative analysis of normal brain
tissues and small abnormalities from these large numbers of different
sequences is a great challenge in clinical applications. Multispectral MRI
analysis can simplify the job considerably by combining unlimited number of
available co-registered sequences in a single suite. However, poor
performance of the multispectral system with conventional image
classification and segmentation methods makes it inappropriate for clinical
analysis. Recent works in multispectral brain MRI analysis attempted to
resolve this issue by improved feature extraction approaches, such as
transform based methods, fuzzy approaches, algebraic techniques and so
forth. Transform based feature extraction methods like Independent
Component Analysis (ICA) and its extensions have been effectively used in
recent studies to improve the performance of multispectral brain MRI
analysis. However, these global transforms were found to be inefficient and
inconsistent in identifying less frequently occurred features like small lesions,
from large amount of MR data.
The present thesis focuses on the improvement in ICA based feature
extraction techniques to enhance the performance of multispectral brain MRI
analysis. Methods using spectral clustering and wavelet transforms are
proposed to resolve the inefficiency of ICA in identifying small
abnormalities, and problems due to ICA over-completeness. Effectiveness of
the new methods in brain tissue classification and segmentation is confirmed
by a detailed quantitative and qualitative analysis with synthetic and clinical,
normal and abnormal, data. In comparison to conventional classification
techniques, proposed algorithms provide better performance in classification
of normal brain tissues and significant small abnormalities.
Description:
Department of Computer Applications
Cochin University of Science and Technology
Binu, Paul P; Dr.Rajasenan,D(Cochin University Of Science And Technology, July , 2013)
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Abstract:
The overall objective of the study is to examine whether the tribal communities in Kerala can be considered a coherent group in terms of select indicators of development by focusing on nine major tribal communities. The study also aims to bring out the intercommunity differences if any in aspects of livelihood options and education level of the tribal communities in Kerala
Description:
Department of Applied Economics
Cochin University of Science and Technology
Geetha, P; Dr.Ravindranatha Menon,N(Cochin University of Science & Technology, 1994)
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Abstract:
This thesis embodies findings on a taxonomical investigation of a group of lower marine invertebrates belonging to the category coelomata. Bryozoans are well known both in fossil and recent taxonomical history. They comprise of about 5,000 living and 16000 fossil species. Bryozoans are well known for their taxonomic abundance and structural diversity,representing the various ecological niches ranging from the intertidal to the abyssal benthic. At a time when global marine biological diversity has become a concern of not only to the scientists but also to the policy makers,an understanding of species diversity and abundance are cardinal aspects of biological studies. Geological time scales which is known that by Pre-Cambrian, marine invertebrate diversity reach the maximum and this diversity has become more comprehensive as time advanced. Taxonomists a vanishing species of scientists have become more concerned in discerning patterns of species diversity. The basic tool for this is identification fo animals. with this idea in mind a detailed study of taxonomy of bryozoan was undertaken . The major part of this thesis is devoted to describe various species of bryozoans with detailed description and ecotypical variations.The pattern of distribution and abundance which are important aspects of animal groups have also been documented. Possible effects of heavy metal contamination on the tolerance and growth of bryozoans, a few species of which have been eliminated from the chronically polluted areas of Cochin backwaters have also been documented.
Description:
Division of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, cochin University of Science and Technology
Sony, Vijayan; Dr.Varkey, A M(Cochin University of Science And Technology, August , 2014)
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Abstract:
Maritime ports are inevitable for India’s economic development. The very existence and sustainable development of ports depend on clean port environment. There is a notion that shipping is an over regulated industry. But in India, it is being operated under sub- standard conditions, raising crucial issues of environmental pollution in the country’s ports. The negative impacts of vessel sourced pollution on the eco-fragile coastal peninsula can be detrimental to the living conditions, health and interests of the coastal population. It can disturb marine life and imbalance the aquatic ecosystem. The present study analyses control of vessel sourced pollution in Indian ports from an economic and ecological perspective. The study investigates legal reasons behind the weak control, regulation and monitoring over vessel sourced pollution in Indian ports. The loopholes in the legal system are identified and suggestion made to implement stronger enforcement. Unless, vessel operations are properly regulated in ports, the trade and economic prospects of India will be jeopardized.
Description:
School of Legal Studies, Cochin University of Science and Technology
Arunachalam, P; Dr.Rajasenan,D(Cochin University Of Science And Technology, November 10, 1995)
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Abstract:
The unprecedented increase in competition as well
as protectionism in world markets makes it imperative for a
country like India to get much more energetically involved
in the export business and make the dictum "export and
flourish" a really true proposition, as against a somewhat
passive "export and perish" approach followed during the
last three and a half decades. At present, India needs to
evolve new export strategies to cope with the changing
international scenario and to ensure a steady improvement
in the otherwise sagging export performance. A search for
such strategic measures becomes all the more important in
view of the all-out efforts of the government for expanding
the country's exports to tide over the crippling balance of
payment deficits and to generate necessary foreign exchange
to meet the import requirements for accelerating the tempo
of economic development.
The present study is an endeavour in this
direction. Taking engineering exports as an example, the
study demonstrates alternative ways of understanding
indepth export performance analysis and learning lessons
for better performance in future
Description:
Department of
Applied Economics, Cochin University of Science and
Technology
Jalaja,N R; Sukumaran Nair,M K(Department of Applied Economics, 2004)
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Abstract:
It examine the aspects of Madhya Pradesh’s industrial structure which throw light on the development, viability and the efficiency of not only the over all industrial sector but also some of the selected industries of the state. The major objectives of are to examine the nature and characteristics of economic backwardness in Madhya Pradesh in an inter-state comparative framework and to analyse the pace and pattern of industrial growth in Madhya Pradesh against the backdrop of liberalization. To explore the industrial structure of Madhya Pradesh using the major structural ratios and industry mix. This study has underlined some structural as well as region specific constraints to the accelerated growth of the manufacturing industry in Madhya Pradesh. The industrial structure of Madhya Pradesh is concentrated and lop-sided. This is evidenced by the dominancy of single industry, basic metal and alloys. A diversified industrial structure is essential for promoting interdependent growth of the manufacturing industry based on the inter-industry linkages and agglomeration. The thesis gives a broad spectrum of regional disparities in development and evidence for Madhya Pradesh’s backwardness also portrayed and reflects the changing industrial structure of the state.
Vincent,Panikulangara; Dr.Sankaranarayanan, K C(Cochin University Of Science And Technology, November 11, 1982)
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Abstract:
This study proposes to verify the hypothesis relating to labour legislation in the industrial sector.Here there are as many as fifty enacments of the central government alone.These legislations indicating the growth of this branch of law over a period of more than half a centuary cover a wide spectrum of interests of workers both individuals and collective in different areas of employment.However this study relates mainly to a)trade unions act,b)industrial employment c)industrial disputes.
Description:
Department Of Applied Economics
Cochin University Of
Science And Technology
Bindu, C S; Dr. Beena, K S(Cochin University of Science and Technology, January 16, 2012)
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Abstract:
The increase in traffic growth and maintenance expenditures demands the urgent need for building better, long-lasting, and more efficient roads preventing or minimizing bituminous pavement distresses. Many of the principal distresses in pavements initiate or increase in severity due to the presence of water. In Kerala highways, where traditional dense graded mixtures are used for the surface courses, major distress is due to moisture induced damages. The Stone Matrix Asphalt (SMA) mixtures provide a durable surface course. Proven field performance of test track at Delhi recommends Stone Matrix Asphalt as a right choice to sustain severe climatic
and heavy traffic conditions. But the concept of SMA in India is not so popularized and its application is very limited mainly due to the lack of proper specifications.
This research is an attempt to study the influence of additives on the
characteristics of SMA mixtures and to propose an ideal surface course for the pavements. The additives used for this investigation are coir, sisal, banana fibres (natural fibres), waste plastics (waste material) and polypropylene (polymer). A preliminary investigation is conducted to characterize the materials used in this study. Marshall test is conducted for optimizing the SMA mixtures (Control mixture-without additives and Stabilized mixtures with additives). Indirect tensile strength tests, compression strength tests, triaxial strength tests and drain down sensitivity tests are conducted to study the engineering properties of stabilized mixtures. The comparison of the performance of all stabilized mixtures with the control mixture and among themselves are carried out. A statistical analysis (SPSS package Ver.16) is performed to establish the findings of this study
Description:
School of Engineering, Cochin
University of Science and Technology
Josephkunju,Paul C; Dr.Sreejith,P S(Cochin University of Science & Technology, September , 2008)
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Abstract:
The thesis presented here unveils an experimental study of the hydrodynamic
characteristics of swirling fluidized bed viz. pressure drop across the distributor and the
bed, minimum fluidizing velocity, bed behaviour and angle of air injection. In swirling
fluidized bed the air is admitted to the bed at an angle 'Ѳ' to the horizontal. The vertical
component of the velocity v sin Ѳ causes fluidization and the horizontal component
v cos Ѳ contributes to swirl motion of the bed material.The study was conducted using spherical particles having sizes 3.2 mm, 5.5 mm & 7.4
mm as the bed materials. Each of these particles was made from high density
polyethylene, nylon and acetal having relative densities of 0.93, 1.05 and 1.47
respectively.The experiments were conducted using conidour type distributors having four rows of
slits. Altogether four distributors having angles of air injection (Φ)- 0°, 5°, 10° & 15°
were designed and fabricated for the study. The total number of slits in each distributor
was 144. The area of opening was 6220 mm2 making the percentage area of opening to
9.17. But the percentage useful area of opening of the distributor was 96.The experiments on the variation of distributor pressure drop with superficial velocity
revealed that the distributor pressure drop decreases with angle of air injection.
Investigations related to bed hydrodynamics were conducted using 2.5 kg of bed
material. The bed pressure drop measurements were made along the radial direction of
the distributor at distances of 60 mm, 90 mm, 120 mm & 150 mm from the centre of
the distributor. It was noticed that after attaining minimum fluidizing velocity, the bed pressure drop increases along the radial direction of the distributor. But at a radial
distance of 90 mm from the distributor centre, after attaining minimum fluidizing
velocity the bed pressure drop remains almost constant. It was also observed that the
bed pressure drop varies inversely with particle size as well as particle density.An attempt was made to determine the effect of various parameters on minimum
fluidizing velocity. It was noticed that the minimum fluidizing velocity varies directly
with angle of air injection (Φ), particle size and particle density.The study on the bed behaviour showed that the superficial velocity required for
initiating various bed phenomena (such as swirl motion and separation of particles from
the cone at the centre) increase with increase in particle size as well as particle density.
It was also observed that the particle size and particle density directly influence the
superficial velocity required for various regimes of bed behaviour such as linear
variation of bed pressure drop, constant bed pressure drop and sudden increase or
decrease in bed pressure drop.Experiments were also performed to study the effect of angle of air injection (Φ). It was
noticed that the bed pressure drop decreases with angle of air injection. It was also
noticed that the angle of air injection directly influence the superficial velocity required
for initiating various bed phenomena as well as the various regimes of bed behaviour.
Description:
Division of Mechanical Engineering,
Cochin University of Science and Technology
Femeena,Hasssan; Dr.Saleena, Mathew(Cochin University of Science and Technology, May , 1996)
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Abstract:
Objectives of the present study are to find out the proximate composition of 20 commercially important tropical fish species on the west coast of India. To determine the collagen content in these commercially important fish species and fractionation of collagen into acid soluble collagen (ASC) and hot water soluble (insoluble) collagen (ISC). To classify fishes according to its collagen content and To study the different storage characteristics in the mince based product—surimi, from different species of fishes. The researcher tries to find out a suitable collagen source to incorporate in surimi. and studies the different storage qualities in the mince based product, surimi at different levels of collagen in different species of fishes. The optimum collagen level to get desirable texture and storage quality for mince based product. The researcher aims to develop some products from surimi with desirable level of collagen. And compare the products prepared from surimi of lesser collagen content fish containing desirable level of collagen with surimi prepared with high collagen content fish without collagen. This study gains in importance as there is littleinformation on the collagen content of different species of fishes in India. So far no attempt was made to classify fishes according to its collagen content.
Description:
School of Industrial Fisheries,
Cochin University of Science and Technology
Jasmin, Maret; Dr.Mathew, N M(Cochin University of Science and Technology, 1996)
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Abstract:
Condoms are widely accepted as a contraceptive for family
planning and population control. It is also accepted as the most
effective barrier against sexually transmitted diseases,
especially AIDS, the incurable disease. But presence of pinholes
and low film strength of condoms make it unsuitable for the
purpose. Quality improvement of condoms by reducing the pinhole
formation and increasing the film strength is thus an essential
requirement for population control as well as for preventing the
spread of sexually transmitted diseases. Strict implementation
of WHO specification of condoms further increases the rejection
percentage. This causes higher rejection loss to condom
manufacturers because the defects could be identified only at
the final stage of processing. If the influence of various
factors which cause these defects is known, manufacturers can
take remedial measures to reduce the defectives so that
rejection loss can be decreased and quality of condoms
increased. In the present study, it was proposed to conduct experiments to improve the quality of condoms by reducing the pinhole rejection percentage and increasing the tensile properties, burst volume, and burst pressure. Ageing property improvement also was an important target among other parameters. Until a cure for AIDS is found, a high quality latex condom is the only effective device in the prevention of the spread of HIV, AIDS and STD's. Hence it is all the more necessary to have high quality condoms.