Santhosh Kumar, G; Dr.Poulose Jacob, K(Cochin University of Science and Technology, April , 2011)
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Abstract:
The theme of the thesis is centred around one important aspect of wireless sensor
networks; the energy-efficiency.The limited energy source of the sensor nodes
calls for design of energy-efficient routing protocols. The schemes for protocol
design should try to minimize the number of communications among the nodes to
save energy. Cluster based techniques were found energy-efficient. In this method
clusters are formed and data from different nodes are collected under a cluster
head belonging to each clusters and then forwarded it to the base station.Appropriate cluster head selection process and generation
of desirable distribution of the clusters can reduce energy consumption of the
network and prolong the network lifetime. In this work two such schemes were
developed for static wireless sensor networks.In the first scheme, the energy wastage due to cluster rebuilding incorporating
all the nodes were addressed. A tree based scheme is presented to alleviate this problem by rebuilding only sub clusters of the network. An analytical model of
energy consumption of proposed scheme is developed and the scheme is compared
with existing cluster based scheme. The simulation study proved the energy
savings observed.The second scheme concentrated to build load-balanced energy efficient clusters
to prolong the lifetime of the network. A voting based approach to utilise
the neighbor node information in the cluster head selection process is proposed.
The number of nodes joining a cluster is restricted to have equal sized optimum
clusters. Multi-hop communication among the cluster heads is also introduced
to reduce the energy consumption. The simulation study has shown that the
scheme results in balanced clusters and the network achieves reduction in energy
consumption.The main conclusion from the study was the routing scheme should pay
attention on successful data delivery from node to base station in addition to the
energy-efficiency. The cluster based protocols are extended from static scenario
to mobile scenario by various authors. None of the proposals addresses cluster
head election appropriately in view of mobility. An elegant scheme for electing
cluster heads is presented to meet the challenge of handling cluster durability
when all the nodes in the network are moving. The scheme has been simulated
and compared with a similar approach.The proliferation of sensor networks enables users with large set of sensor information
to utilise them in various applications. The sensor network programming
is inherently difficult due to various reasons. There must be an elegant
way to collect the data gathered by sensor networks with out worrying about the
underlying structure of the network. The final work presented addresses a way
to collect data from a sensor network and present it to the users in a flexible way.A service oriented architecture based application is built and data collection task
is presented as a web service. This will enable composition of sensor data from
different sensor networks to build interesting applications.
The main objective of the thesis was to design energy-efficient routing schemes
for both static as well as mobile sensor networks. A progressive approach was
followed to achieve this goal.
Description:
Department of Computer Science,
Cochin University of Science and Technology
Binu, G S; Dr.Poulose Jacob, K(Cochin University of Science & Technology, November , 2011)
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Abstract:
The proliferation of wireless sensor networks in a large spectrum of applications had been spurered by the rapid advances in MEMS(micro-electro mechanical systems )based sensor technology coupled with low power,Low cost digital signal processors and radio frequency circuits.A sensor network is composed of thousands of low cost and portable devices bearing large sensing computing and wireless communication capabilities. This large collection of tiny sensors can form a robust data computing and communication distributed system for automated information gathering and distributed sensing.The main attractive feature is that such a sensor network can be deployed in remote areas.Since the sensor node is battery powered,all the sensor nodes should collaborate together to form a fault tolerant network so as toprovide an efficient utilization of precious network resources like wireless channel,memory and battery capacity.The most crucial constraint is the energy consumption which has become the prime challenge for the design of long lived sensor nodes.
Description:
Dept.of Computer Science ,Cochin University of Science and Technology
Ajith,Thomas John; Dr.Shahul,Hameed M(Cochin University of Science and Technology, May , 1996)
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Abstract:
This study mainly deals with the structure of the motorised and mechanised trawl fishing fleet of Kerala, and assess the availability of resources and its extent of exploitation. The study is conducted by observing the performance of small motorised boats operating trawl nets from selected centers along the Kerala coast. The Study also deals with the type and material of construction of the propellers used in selected crafts and the efficiency of the propeller. The fuel consumption pattern of selected medium sized trawlers economics of operation of selected fishing crafts are analyzed through this study. The thesis also Suggest methods for reducing fuel consumption in trawling
Description:
School of Industrial
Fisheries, Cochin University of Science and Technology
Meril, Mathew; Dr.Sudha Kartha,C(Cochin University of Science & Technology, January , 2009)
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Abstract:
In the present work, structural, optical and electrical properties of indium
sulfide are tuned by specific and controlled doping. Silver, tin, copper and chlorine
were used as the doping elements. In2S3 thin films for the present study were prepared
using a simple and low cost “Chemical Spray Pyrolysis (CSP)” technique. This
technique is adaptable for large-area deposition of thin films in any required shape and
facilitates easiness of doping and/or variation of atomic ratio. It involves spraying a
solution, usually aqueous, containing soluble salts of the constituents of the desired
compound onto a heated substrate. Doping process was optimized for different doping
concentrations. On optimizing doping conditions, we tuned the structural, optical and
electrical properties of indium sulfide thin films making them perform as an ideal
buffer layer.
Description:
Department of Physics,
Cochin University of Science and Technology
Sreedevi, Menon K; Mohanan, P(Cochin University of Science and Technology, October , 2006)
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Abstract:
In this thesis, we explore the design, computation, and experimental analysis of
photonic crystals, with a special emphasis on structures and devices that make a
connection with practically realizable systems. First, we analyze the propenies of
photonic-crystal: periodic dielectric structures that have a band gap for
propagation. The band gap of periodically loaded air column on a dielectric
substrate is computed using Eigen solvers in a plane wave basis. Then this idea is
extended to planar filters and antennas at microwave regime. The main objectives
covered in this thesis are:• Computation of Band Gap origin in Photonic crystal with the abet of
Maxwell's equation and Bloch-Floquet's theorem
• Extension of Band Gap to Planar structures at microwave regime
• Predict the dielectric constant - synthesized dieletric cmstant of the substrates
when loaded with Photonic Band Gap (PBG) structures in a microstrip
transmission line
• Identify the resonant characteristic of the PBG cell and extract the equivalent
circuit based on PBG cell and substrate parameters for microstrip
transmission line
• Miniaturize PBG as Defected Ground Structures (DGS) and use the
property to be implemented in planar filters with microstrip transmission line
• Extended the band stop effect of PBG / DGS to coplanar waveguide and
asymmetric coplanar waveguide.
• Formulate design equations for the PBG / DGS filters
• Use these PBG / DGS ground plane as ground plane of microstrip antennas
• Analysis of filters and antennas using FDID method
Description:
Department of Electronics,
Cochin University of Science and Technology
Haridasan,V; Dr.Pylee,M V(Cochin University Of Science And Technology, December 20, 1977)
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Abstract:
The broad objective of the study is to find out
the management practices followed in the rubber estates in
India. Comparing the management practices followed in the
estates belonging to Indian and non-Indian companiess is also
an objective. It has been widely held that the management
practices followed in the estates belonging to these groups
vary considerably. Hence attempt is made to find out the
divergence between them in regard to various practices and
to identify and bring them into broader relief so that the
strong points of each would be emulated by the other.
The management practices are examined in the light
of well-established management principles and techniques
adopted in business and industry. The principles of management
which are widely accepted are Planning, Organizing,
Staffing, Directing and Controlling. Other management principles
and techniques relating to personnel - finance, marketing,
materials and transporting - are also examined in the
appropriate context
Description:
School Of Management Studies, Cochin University Of Science And Technology
Mathew, Emmanuel; Dr.Arunachalam, P(Cochin University of Science and Technology, March 17, 2004)
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Abstract:
This thesis Entitled entrepreneurship and motivation in small business sector of kerala -A study of rubber products manufacturing industry.Rubber-based industry in Kerala was established only in the first half of the 20th century.the number of licensed manufacturers in the State has increased substantially over the years, particularly in the post- independence period. 54 rubber manufacturing units in 1965-66, the number of licensed rubber-based industrial units has increased to 1300 units in 2001-02. In 2001-02 Kerala occupied the primary position in the number of rubber goods manufacturers in the country.As per the latest report of the Third All India Census of Small Scale Industries 2001-02, Kerala has the third largest number of registered small scale units in the country next after Tamil Nadu and Utter Pradesh.This study of entrepreneurship in the small-scale rubber goods manufacturing industry in Kerala compares a cross section of successful and unsuccessful entrepreneurs with respect to socio-economic characteristics and motivational dynamics. Based on a sample survey of 120 entrepreneurs of Kottayam and Ernakulam districts successful and unsuccessful entrepreneurs were selected using multiple criteria. The study provides guidelines for the development of entrepreneurship in Kerala.The results on the socio-economic survey support the hypothesis that the successful entrepreneurs will differ from unsuccessful entrepreneurs with respect to education, social contacts, initial investment, sales turnover, profits, capital employed, personal income, and number of employees.Successful entrepreneurs were found to be self~starters. Successful entrepreneurs adopted a lot more technological changes than unsuccessful entrepreneurs. Successful entrepreneurs were more innovative — the percent of successful entrepreneurs and unsuccessful entrepreneurs reporting innovations in business were 31.50 and 8.50 percent respectively.
Description:
Department of Applied Economics, Cochin University of Science and Technology.
Sreebha, S; Dr. Padmalal, D(Cochin University of Science and Technology, November , 2008)
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Abstract:
This thesis Entitled Environmental impact of Sand Mining :A case Study in the river catchments of vembanad lake southwest india.The entire study is addressed in nine chapters. Chapter l deals with the general introduction about rivers, problems of river sand mining, objectives, location of the study area and scope of the study. A detailed review on river classification, classic concepts in riverine studies, geological work of rivers and channel processes, importance of river ecosystems and its need for management are dealt in Chapter 2. Chapter 3 gives a comprehensive account of the study area - its location, administrative divisions, physiography, soil, geology, land use and living and non-living resources. The various methods adopted in the study are dealt in Chapter 4. Chapter 5 contains river
characteristics like drainage, environmental and geologic setting, channel characteristics, river discharge and water quality of the study area. Chapter 6 gives an account of river sand mining (instream and floodplain mining) from the study area. The various environmental problems of river sand mining on the land adjoining the river banks, river channel, water, biotic and social / human environments of the area and data interpretation are presented in Chapter 7. Chapter 8 deals with the Environmental Impact Assessment (EIA) and Environmental Management Plan (EMP) of sand mining from the river catchments of Vembanad lake.
Description:
Environmental Sciences Division, Centre for
Earth Science Studies
Krishna Mohan,K S; Dr.Mohanakumar,K(Cochin University Of Science And Technology, February , 2013)
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Abstract:
Tropical cyclones genesis, movement and intensification are highly dependent
on its environment both oceanic and atmospheric. This thesis has made a detailed
study on the environmental factors related to tropical cyclones of North Indian
Ocean basin. This ocean basin has produced only 6% of the global tropical
cyclones annually but it has caused maximum loss of human life associated with
the strong winds, heavy rain and particularly storm surges that accompany severe
cyclones as they strike the heavily populated coastal areas.
Atmospheric factors studied in the thesis are the moisture content of the
atmosphere, instability of the atmosphere that produces thunderstorms which
are the main source of energy for the tropical cyclone, vertical wind shear to
which cyclones are highly sensitive and the Sub-Tropical westerly Jetsteram and
its Asian high speed center. The oceanic parameters studied are sea surface
temperature and heat storage in the top layer of the ocean. A major portion of the
thesis has dealt with the three temporal variabilities of tropical cyclone frequency
namely intra-seasonal (mainly the influence of Madden Julian Oscillation), inter-
annual (the relation with El Nino Southern Oscillation) and decadal variabilities.
Regarding decadal variability, a prominent four decade oscillation in the frequency
of both tropical cyclones and monsoon depressions unique to the Indian Ocean
basin has been brought out.
The thesis consists of 9 chapters.
Description:
Department of Atmospheric Sciences, Cochin University of Science
and Technology,
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