Latha, C; Dr.Ammini, Joseph(Cochin University of Science and Technology, April , 1998)
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Abstract:
In the last decades considerable headway has been made in research and development
of phyto-chemical pesticides. The most notable recent success is the commercial
development of neem products for insect control. The present investigation on
Environmentally Compatible Phyto-Chemical Larvicides for Mosquito Control was
undertaken to identify plants of the locality with potential larvicidal activity on mosquito
larvae. This has been achieved by screening 17 plant species against four mosquito species.
The observation and data are compiled in six chapters .
Description:
School of Environmental Studies, Cochin University of Science and Technology
May,Mathew; Dr.Jose, Payyappilly T(Cochin University Of Science And Technology, August 31, 2009)
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Abstract:
The base concept from which the entire research problem emerged is as
follows:
Lack of spatial planning and effective development management system lead
to urban sprawl with non-optimal density of population to support urban
infrastructure on the one side causing a lesser quality of life in urban areas. On the
other side it causes loss of productivity of natural ecosystems and agricultural areas
due to disturbance to the ecosystems. Planned compact high density development
with compatible mixed land use can go a long way in achieving environmental
efficiency of development management system.
Description:
School Of Management Studies
Cochin University Of Science And Technology
Pereira, Gladys Myrtle; Poduval, P R(Cochin University of Science And Technology, October , 1985)
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Abstract:
The present study focuses attention on the social phenomenon of environmental protection pressure groups in Kerala. A detailed historical background of environmental protection pressure groups at international and national scenes as background for this study .Emphirical studies of environmental protection pressure groups in Kerala with special reference to industrial pollution is dicussed in detail . The main objective of the study is to identify the factors that make pressure groups succeed or fail in achieving their set objectives.The factors include the structure and strategies of social pressure groups and the support they receive from the environment.
Description:
School of management studies, Cochin University of Science And Technology
Benjamin, P V; Dr.Balakrishnan, K P; Dr.Harindranathan Nair, M V(Cochin University Of Science And Technology, March , 1998)
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Abstract:
In the case of urban centres of the developing countries, corrective measures
for the environmental consequences of spontaneous or wrongly planned
developments are often prohibitively costly. Hence environmentally planned
development alone appears to be the solution for which, a compre-hensive
assessment of all the resources is an essential pre—requisite. An under-standing
of the prevailing environmental conditions is essential for the effective
management and execution of programmes for sustainable development.
The present work is a modest attempt at assessing the environmental
resources of Cochin, the industrial and business capital of Kerala and a fast
developing metropolis.
Description:
School of Environmental Studies, Cochin University of Science
and Technology
Antony,C A; Dr.Sankaranarayanan, K C(Cochin University of Science and Technology, October 7, 1987)
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Abstract:
The present study consists of nine chapters including the introductory chapter. Chapter II makes a brief review of environmental literature and examines various measures adopted at the global level to protect the environment. The environmental problems often transgress national
sovereignity and geographical boundaries. Therefore, attempts must be made at the national and international levels to protect the environment, the resources of which are the common property of mankind. The protection of the national environment from the ancient till the present forms the content of Chapter III. These chapters together provide a background to understand the issues analysed in the subsequent chapters. Carefully worked out theoretical framework is a pre-requisite for the successful study of a complex subject. Some of the theoretical issues of ‘environomics’ are examined in Chapter IV. The theoretical issues involved in estimating the costs and benefits of environmental protection constitute the theme of Chapter V. The state of environment in Eloor-Edayar Industrial belt andthe impact analysis of pollution of the area are discussed in Chapter VI and VII respectively. Chapter VIII makes the financial estimate of environmental protection of the project And finally, Chapter IX presents the findings of the study
Description:
Department of
Applied Economics, Cochin University of Science and Technology
Damodaran, Nambudiri D; Dr.George, Philip; Dr.Gopakumar, K(Cochin University of Science and Technology, November 30, 1987)
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Abstract:
An attempt has been made in this study to screen some fish muscle enzymes to assess their potential worth in testing the degree of freshness of fish. A problem with routine enzyme activity determinations is the complexity of the method of enzyme assay. Hence, in the present study as far as possible simple assay techniques were adopted. Several species were screened to assess the possibility of employing this procedure on a large scale. It is hoped that findings of this study will lead to the development of meaningful criteria in testing the freshness of fish. This thesis has been divided into five chapters
Description:
Division
of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University ofScience and Technology
Sunil Jose,T; Dr.Rani,Joseph(Cochin University of Science & Technology, November , 2006)
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Abstract:
A detailed study of the blends of ethylene-propylene-diene rubber (EPDM) and
chlorobutyl rubber (CIIR) is proposed in this study. These blends may find
application in the manufacture of curing diaphragms/curing envelopes for tire
curing applications. EPDM possesses better physical properties such as high heat
resistance, ozone resistance, cold and moisture resistance, high resistance to
permanent defonnation, very good resistance to flex cracking and impact. Because
of the low gas and moisture penneability, good weathering resistance and high
thermal stability of CIIR, blends of EPDM with CIlR may be attractive, if
sufficient mechanical strength can be developed. Although a lot of work has been
done on elastomer blends, studies on the blends of EPDM and CIIR rubbers are
meagre. Hence in this investigation it is proposed to make a systematic study on
the characteristics of EPDM and CIIR rubber blends.The mechanical and physical properties of an elastomer blend depend mainly on the
blend compatibility. So in the first part of the study, it is proposed to develop
compatible blends of EPDM with CIIR. Various commercial grades of ethylenepropylene-
diene rubber are proposed to be blended with a specific grade of chlorobutyl
rubber at varying proportions. The extent of compatibility in these blends is proposed
to be evaluated based on their mechanical properties such as tensile strength, tear
strength and ageing resistance. In addition to the physical property measurements,
blend compatibility is also proposed to be studied based on the glass transition
behavlour of the blends in relation to the Tg's of the individual components using
Differential Scanning Calorimetry (DSC) and Dynamic Mechanical Analysis (DMA).
The phase morphology of the blends is also proposed to be investigated by Scanning
Electron Microscopy (SEM) studies of the tensile fracture surfaces. In the case of incompatible blends, the effect of addition of chlorosulfonated polyethylene as a
compatibiliser is also proposed to be investigated.In the second part of the study, the effect of sulphur curing and resin curing on the
curing behaviour and the vulcanizate properties of EPDM/CIIR blends are planned
to be evaluated. Since the properties of rubber vulcanizates are determined by their
network structures, it is proposed to determine the network structure of the
vulcanizates by chemical probes so as to correlate it with the mechanical
properties.In the third part of the work, the effect of partial precuring of one of the
components prior to blending as a possible means of improving the properties of
the blend is proposed to be investigated. This procedure may also help to bring
down the viscosity mismatch between the constituent e1astomers and provide
covulcanization of the blend.The rheological characteristics and processability of the blends are proposed to be
investigated in the last part of the study. To explore their possible applications, the
air permeability of the blend samples at varying temperatures is proposed to be
measured. The thermal diffusivity behaviour of EPDM/CIlR blends is also
proposed to be investigated using novel laser technique. The thermal diffusivity of
the blends along with the thermal degradation resistance may help to determine
whether the blends are suitable for high temperature applications such as in the
manufacturing of curing envelope.
Description:
Deparhnent of Polymer Science and Rubber Technology,
Cochin University of Science and Technology
Blends of chlorobutyl rubber (CIIR) with two grades of ethylene-propylene diene
monomer rubber (EPDM) were prepared and the effect of blend ratio on the cure
characteristics, hot air ageing resistance, steam ageing resistance, and mechanical
properties were evaluated. The blend of CIIR with EPDM grade 301 T showed
additive behavior and the blend with the other grade of EPDM (NDR 4640)
showed synergistic behavior.
Unsaturated polyester resins (UPRs) are
used widely in the fiber-reinforced plastics (FRPs) industry.
These resins have the disadvantages of brittleness and poor
resistance to crack propagation. In this study, hybrid polymer
networks (HPNs) based on UPR and epoxidized phenolic
novolacs (EPNs) were prepared by reactive blending.
A HPN is composed of a backbone polymer containing two
types of reactive groups that can take part in crosslinking
reactions via different mechanisms. EPNs were prepared by
glycidylation of novolacs using epichlorohydrin. The novolacs
had varying phenol: formaldehyde ratios. Blends of unsaturated
polyester with EPN were then prepared. The
physical properties of the cured blends were compared with
those of the control resin. EPN shows good miscibility and
compatibility with the resin and improves the toughness
and impact resistance substantially. Considerable enhancement
of tensile strength is also noticed at about 5% by
weight of epoxidized novolac resin. TGA, DMA, and DSC
were used to study the thermal properties of the toughened
resin and the fracture behavior was studied using SEM. The
blends are also found to have better thermal stability. Blending
with EPN can be a useful and cost-effective technique for
modification of UPR
Description:
Journal of Applied Polymer Science, Vol. 100, 457–465 (2006)
Hybrid polymer networks (HPNs) based on unsaturated polyester resin (UPR) and epoxy resins were synthesized by
reactive blending. The epoxy resins used were epoxidised phenolic novolac (EPN), epoxidised cresol novolac (ECN) and
diglycidyl ether of bisphenol A (DGEBA). Epoxy novolacs were prepared by glycidylation of the novolacs using epichlorohydrin.
The physical, mechanical, and thermal properties of the cured blends were compared with those of the control resin.
Epoxy resins show good miscibility and compatibility with the UPR resin on blending and the co-cured resin showed substantial
improvement in the toughness and impact resistance. Considerable enhancement of tensile strength and toughness
are noticed at very low loading of EPN. Thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA) and
diVerential scanning calorimetry (DSC) were employed to study the thermal properties of the toughened resin. The EPN/
UPR blends showed substantial improvement in thermal stability as evident from TGA and damping data. The fracture
behaviour was corroborated by scanning electron microscopy (SEM). The performance of EPN is found to be superior to
other epoxy resins
Rajeev, D(Cochin University of Science and Technology, December 1, 1998)
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Abstract:
This thesis is a study of -Equality of Opportunity in Public Employment : Judicial Perspectives on Backwardness. This study is an attempt to evaluate the concept of backwardness and equality of opportunity in employment and to assess the judicial perspectives in relation to them. The study reveals that the recent review petition of the Constitution Bench did not assess the decision of Chakradhar and its import. The study reveals that the Indian judiciary could successfully locate and apply the above principles. It was-Justice Subba Rao's nascent attempt in Devadasan which marked the starting point of such a jurisprudential enquiry. Later Thomas developed the thoughts by a reading new meaning and content to equality provisions of the Constitution which included the elimination of inequalities as the positive content of Articles 14 and 16(1) and elevated reservation provision to the same status of equality principles under the Constitution. Soshit, Vasanth Kumar and Mandal supplemented further to the jurisprudential contents. In this process, the courts were guided by the theories of John Rawls, David Miller, Ronald Dworkin, Max Weber and Roscoe Pound. Thus there was a slow and steady process of transformation of the reservation provision. From an anti-meritarian, unenforceable and enabling provision, it reached a stage of equally relevant and explanatory part of fundamental right to equality. Mandal viewed it as a part of sharing of State power. Though this can be seen by rereading and re-joining thoughts of judges in this regard, the judicial approach lacks coherence and concerted efforts in evolving a jurisprudential basis for protective discrimination. The deliberations of the framers of the Constitution reveals that there was much confusion and indeterminacy with regard to the concept of Backwardness. The study shows that the judiciary has been keeping intact the framers’ expectation of having a reasonable quantum of reservation, preventing the undeserved sections from enjoying the benefit, avoiding its abuse and evolving a new criteria and rejecting the old ones.
Description:
School of Legal Studies, Cochin University of Science and Technology
Given a graph G and a set X ⊆ V(G), the relative Wiener index of X in G is defined as
WX (G) = {u,v}∈X
2 dG(u, v) . The graphs G (of even order) in which for every partition
V(G) = V1 +V2 of the vertex set V(G) such that |V1| = |V2| we haveWV1 (G) = WV2 (G) are
called equal opportunity graphs. In this note we prove that a graph G of even order is an
equal opportunity graph if and only if it is a distance-balanced graph. The latter graphs are
known by several characteristic properties, for instance, they are precisely the graphs G in
which all vertices u ∈ V(G) have the same total distance DG(u) = v∈V(G) dG(u, v). Some
related problems are posed along the way, and the so-called Wiener game is introduced.
Archana, S N; Dr.Humayoon,Kabir S(Cochin University of Science and Technology, December , 2012)
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Abstract:
Electronic resources have become a vital part of an academic library especially in
universities and higher education institutions. The availability of electronic resources and
the acceptance of the fonnat among the academics are rising day by day. As far as
engineering students are concerned, they are much techno-savy and are more used to
electronic resources. So it has become necessary for the libraries of engineering institutions
to subscribe and provide access to electronic resources to satisfy its user community. Many
studies have identified that academics are much preferring online journals and databases
than their print counter-parts