Alex,A V; Jacob, Philip(Cochin University of Science and Technology, May , 2001)
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Abstract:
Ultrasonic is a good tool to investigate the elastic properties of crystals. It enables one to determine all the elastic constants, Poisson’s ratios, volume compressibility and bulk modulus of crystals from velocity measurements. It also enables one to demonstrate the anisotropy of elastic properties by plotting sections of the surfaces of phase velocity, slowness, group velocity, Young’s modulus and linear compressibility along the a-b, b-c and a-c planes. They also help one to understand more about phonon amplification and help to interpret various phenomena associated with ultrasonic wave propagation, thermal conductivity, phonon transport etc. Study of nonlinear optical crystals is very important from an application point of view. Hundreds of new NLO materials are synthesized to meet the requirements for various applications. Inorganic, organic and organometallic or semiorganic classes of compounds have been studied for several reasons. Semiorganic compounds have some advantages over their inorganic and inorganic counterparts with regard to their mechanical properties. High damage resistance, high melting point, good transparency and non-hygroscopy are some of the basic requirements for a material to be suitable for device fabrication. New NLO materials are being synthesized and investigation of the mechanical and elastic properties of these crystals is very important to test the suitability of these materials for technological applications
Prabha, C; Dr.Pillai, P R S(Cochin University of Science And Technology, July 24, 2013)
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Abstract:
Underwater target localization and tracking attracts tremendous research interest due to various impediments to the estimation task caused by the noisy ocean environment. This thesis envisages the implementation of a prototype automated system for underwater target localization, tracking and classification using passive listening buoy systems and target identification techniques. An autonomous three buoy system has been developed and field trials have been conducted successfully. Inaccuracies in the localization results, due to changes in the environmental parameters, measurement errors and theoretical approximations are refined using the Kalman filter approach. Simulation studies have been conducted for the tracking of targets with different scenarios even under maneuvering situations. This system can as well be used for classifying the unknown targets by extracting the features of the noise emanations from the targets.
Description:
Department of Electronics, Cochin University of Science and Technology.
Ganapathy, Rajendran; Dr.Kuriakose, A P(Cochin University of Science and Technology, August 21, 1995)
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Abstract:
The thesis consists of seven chapters. The first
chapter is a general introduction on rice by-products,
their composition and utilization at present. The
different milling processes adopted in paddy and the major
by-products obtained from these processes viz. rice husk,
rice bran, rice bran oil and rice husk ash are described.
The physical properties and chemical composition of the
rice husk and its general uses are given in detail. The
chemical composition of the rice bran and its separation
from paddy is also included. The details of solvent
extraction process used for obtaining rice bran oil and
also its chemical constitution is discussed in this
chapter. Also described is the preparation and the
different uses of rice husk ash. A literature survey is
also done on the utilization of rice by-products in rubber
and plastics as on today. The scope and objectives of the
present study is also included at the end of this chapter.
Description:
Department of
Polymer Science and Rubber Technology, Cochin University of
Science and Technology
Sreeraj, M; Dr.Sumam Mary,Idicula(Cochin University Of Science And Technology, July 30, 2012)
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Abstract:
Handwriting is an acquired tool used for communication of one's
observations or feelings. Factors that inuence a person's handwriting not
only dependent on the individual's bio-mechanical constraints, handwriting
education received, writing instrument, type of paper, background, but
also factors like stress, motivation and the purpose of the handwriting.
Despite the high variation in a person's handwriting, recent results from
different writer identification studies have shown that it possesses sufficient
individual traits to be used as an identification method.
Handwriting as a behavioral biometric has had the interest of researchers
for a long time. But recently it has been enjoying new interest due to an
increased need and effort to deal with problems ranging from white-collar
crime to terrorist threats. The identification of the writer based on a piece
of handwriting is a challenging task for pattern recognition. The main
objective of this thesis is to develop a text independent writer identification
system for Malayalam Handwriting. The study also extends to developing a
framework for online character recognition of Grantha script and Malayalam
characters
Description:
Department of Computer Science, Cochin University of Science and
Technology