Nithyaja, B; Jisha, V K; Tintu, R; Saramma, A V; Nampoori, V P N(Laser Physics, 2009)
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Abstract:
The growth kinetics of an aerial bacterial colony on solid agar media was studied using laser
induced fluorescence technique. Fluorescence quenching of Rhodamin B by the bacterial colony was utilized
for the study. The lag phase, log phase, and stationary phase of growth curve of bacterial colony was identified
by measuring peak fluorescence intensity of dye doped bacterial colony.
Seema,P V; Sudha, B; Pius S,Padayatti; Asha,Abraham; Raghu,K G; Paulose,C S(Department of Biotecnology, June , 1996)
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Abstract:
The functional basis of diabetes-mellitus to a certain extent,
can be elucidated by studying diabetes-induced changes
in metabolic enzymes. Malate dehydrogenase (MDH),
is an enzyme directly involved in glucose metabolism. The
kinetic parameters of MDH and its purified cytosolic isozyme,
S-MDH, have been studied in the liver of streptozotocin-
diabetic rats; also the potential of the leaf extract of A.
marmelose as an was investigated. The
Km of the liver enzyme increased significantly, in both
crude and purified preparations in the diabetic state when
compared to Lhe respective controls. Insulin as well as leaf-
•extract treatment of the diabetic rats brought about a reversal
of K. values to near normal. Vmax of purified S-MDH
was significantly higher in the diabetic state when compared
to the control. Insulin and leaf extract treatment did not
reverse this change. Since MDH is an important enzyme in
glucose metabolism, the variation in its quantitative and
qualitative nature may contribute to the pathological status
of diabetes. The fact that leaf extract of A. marmelose
was found to be as effective as insulin in restoration of blood
glucose and body weight to normal levels, the use of A.
marmelose as potential hypoglycemic agent is suggested.
On-line handwriting recognition has been a frontier
area of research for the last few decades under the purview of
pattern recognition. Word processing turns to be a vexing
experience even if it is with the assistance of an alphanumeric
keyboard in Indian languages. A natural solution for this
problem is offered through online character recognition. There is
abundant literature on the handwriting recognition of western,
Chinese and Japanese scripts, but there are very few related to
the recognition of Indic script such as Malayalam. This paper
presents an efficient Online Handwritten character Recognition
System for Malayalam Characters (OHR-M) using K-NN
algorithm. It would help in recognizing Malayalam text entered
using pen-like devices. A novel feature extraction method, a
combination of time domain features and dynamic representation
of writing direction along with its curvature is used for
recognizing Malayalam characters. This writer independent
system gives an excellent accuracy of 98.125% with recognition
time of 15-30 milliseconds
Description:
2010 First International Conference on Integrated Intelligent Computing
Sheeja, N K(Emerald Group Publishing Limited, August 15, 2012)
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Abstract:
This paper aims to describe recent developments in the services provided by Indian
electronic thesis and dissertation (ETD) repositories. It seeks to explore the prospect of knowledge
formation and diffusion in India and to discuss the potential of open access e-theses repositories for
knowledge management.This study is based on literature review and content analysis of
IndianETDrepository websites. Institutional repositories and electronic thesis and dissertation projects
in India were identified through a literature survey as well as internet searching and browsing.
The study examines the tools, type of contents, coverage and aims of Indian ETD repositories.The paper acknowledges the need for knowledge management for national development.
It highlights the significance of an integrated platform for preserving, searching and retrieving Indian
theses. It describes the features and functions of Indian ETD repositories.The paper provides insights into the characteristics of the national repository of
ETDs of India, which encourage and support open access to publicly-funded research
Archana, S N; Padmakumar, P K; Beena, C(INFLIBNET Centre, Ahmedabad, March , 2013)
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Abstract:
In this knowledge era, the value of corporations, academic organizations and individuals is directly
related to their knowledge and intellectual capital(IC). A newand potentially paradigm shift focus
in the intersection between knowledge and intelligence is the recognition of the importance of
understanding the intellectual capital of organizations. This paper explains how Cochin University
of Science and Technology (CUSAT) is identifying and managing its intellectual capital for creating
competitive advantage for the future. This paper also explores the different cost effective knowledge
management strategies applied at CUSAT for managing its intellectual capital
Description:
9th International CALIBER - 2013, INFLIBNET Centre, Gandhinagar, Gujarat, March 21-23, 2013
Thomas,P T; George,K K(Department of Applied Economics, September , 1994)
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Abstract:
It is hoped that the present study by analysing the
dynamics of agrarian change and peasant mobility may contribute
to the on-going debate on this issue in India and other developing
countries. It may also help to throw light on the validity of some
of the theories formulated on the basis of experience in different
regions and at different times. The study is likely to be of
special importance as it covers an area which has one of the
highest densities of population. The area has also witnessed
sweeping changes in agrarian structure as a result of the most
radical land reforms among the Indian states.
Dayana, M.K.; Dr. Varkey, A.M(Cochin University of Science and Technology, October 26, 2015)
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Abstract:
This is a study of land use law in India. Land use Controls has been a subject
of controversy since the human settlement. Gamut of control increased with human
development. Now the controls are for many purposes.Nuisance created through various land use was tried to be avoidedthrough the common law controls7. Whether the utility of the activity outweighs
the environmental consideration was the consideration before the court. A
standard definition8 of nuisance could meet most of the problems relating to land
use. Later on, planning and zoning laws brought in major changes. Health, safety
and facilities of others attracted land use controls9. After the Stockholm the sphere
of government interference increased. Several legislations were enacted. Existing
legislations were modified. These come in conflict with the interests of different
sections of society. Coastal Regulations10 and high range protection11 are
manifestations of such unrest. A systematic study on these issues is of current
interest. Exploring of some areas in this respect is also relevant in this respect.
Anantharaman, M R; Lija, Joy K; Sooraj, V; Swapna, Nair S; Narayanan, T N; Ajayan, P M; Sethulakshmi, N(AIP Publishing, March 28, 2014)
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Abstract:
Commercial samples of Magnetite with size ranging from 25–30nm were coated with polyaniline by
using radio frequency plasma polymerization to achieve a core shell structure of magnetic nanoparticle
(core)–Polyaniline (shell). High resolution transmission electron microscopy images confirm the core
shell architecture of polyaniline coated iron oxide. The dielectric properties of the material were
studied before and after plasma treatment. The polymer coated magnetite particles exhibited a large
dielectric permittivity with respect to uncoated samples. The dielectric behavior was modeled using a
Maxwell–Wagner capacitor model. A plausible mechanism for the enhancement of dielectric
permittivity is proposed
Sarasu, T N; Dr.George, M J(Cochin University of Science and Technology, March , 1987)
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Abstract:
Lobsters are renowned the world over as tasty delicacies and are in great demand for Epicurian gourests. As a result these animals found in different parts of the world from countries like India they are mostly frozen and exported thus earning considerable foreign exchange for the country. Importance of this crustacean is thus well known and whatever harvested from nature are utilized to the maximum extent. The demand being much more than what is being produced the need for artificial culture becomes evident. In this context a complete knowledge of the lifecycle ,larval biology and their culture is very essential. Thus with the object of studying the life history of the commercially important lobsters fished from Indian waters the larval biology of panulirus homarus has been taken up as the project for the present study
Radhakrishnan, P; Nampoori, V P N; Girijavallabhan, C P; Geetha, K; Rajesh, M(Journal of Optics A: Pure and Applied Optics, Institute of Physics Publishing, January 13, 2006)
[+]
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Abstract:
We present a compact solid-state laser based on leaky mode propagation
from a dye-doped polymer free-standing film waveguide. The edge emitted
spectrum clearly indicated the existence of periodic resonant modes. The
reflections from the lateral faces of the free-standing film provided the
optical feedback thus giving rise to a Fabry–Perot like optical cavity. This
together with the guidance through the gain medium gave rise to intense
narrow emission lines. For a pump energy of 1.82 mJ/pulse, an intense line
with FWHM ∼0.4 nmwas observed at 576.5 nm.
Nampoori, V P N; Radhakrishnan, P; Girijavallabhan, C P; Geetha, K; Rajesh, M(Journal of Optics A: Pure and Applied Optics, Institute of Physics Publishing, January 13, 2006)
[+]
[-]
Abstract:
We present a compact solid-state laser based on leaky mode propagation
from a dye-doped polymer free-standing film waveguide. The edge emitted
spectrum clearly indicated the existence of periodic resonant modes. The
reflections from the lateral faces of the free-standing film provided the
optical feedback thus giving rise to a Fabry–Perot like optical cavity. This
together with the guidance through the gain medium gave rise to intense
narrow emission lines. For a pump energy of 1.82 mJ/pulse, an intense line
with FWHM ∼0.4 nmwas observed at 576.5 nm.
Girijavallabhan, C P; Radhakrishnan, P; Nampoori, V P N; Geetha, K; Rajesh, M(Journal of Optics A: Pure and Applied Optics, Institute of Physics Publishing, January 13, 2006)
[+]
[-]
Abstract:
We present a compact solid-state laser based on leaky mode propagation
from a dye-doped polymer free-standing film waveguide. The edge emitted
spectrum clearly indicated the existence of periodic resonant modes. The
reflections from the lateral faces of the free-standing film provided the
optical feedback thus giving rise to a Fabry–Perot like optical cavity. This
together with the guidance through the gain medium gave rise to intense
narrow emission lines. For a pump energy of 1.82 mJ/pulse, an intense line
with FWHM ∼0.4 nmwas observed at 576.5 nm.
Rejeena, I; Dr. P. Radhakrishnan(Cochin University of Science and Technology, April 23, 2015)
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Abstract:
Nonlinear optics is a broad field of research and technology that
encompasses subject matter in the field of Physics, Chemistry, and Engineering.
It is the branch of Optics that describes the behavior of light in nonlinear media,
that is, media in which the dielectric polarization P responds nonlinearly to the
electric field E of the light. This nonlinearity is typically only observed at very
high light intensities. This area has applications in all optical and electro optical
devices used for communication, optical storage and optical computing. Many
nonlinear optical effects have proved to be versatile probes for understanding
basic and applied problems. Nonlinear optical devices use nonlinear dependence
of refractive index or absorption coefficient on the applied field. These nonlinear
optical devices are passive devices and are referred to as intelligent or smart
materials owing to the fact that the sensing, processing and activating functions
required for optical processes are inherent to them which are otherwise separate
in dynamic devices.The large interest in nonlinear optical crystalline materials has been
motivated by their potential use in the fabrication of all-optical photonic devices.
Transparent crystalline materials can exhibit different kinds of
optical nonlinearities which are associated with a nonlinear polarization. The
choice of the most suitable crystal material for a given application is often far
from trivial; it should involve the consideration of many aspects. A high
nonlinearity for frequency conversion of ultra-short pulses does not help if the
interaction length is strongly limited by a large group velocity mismatch and the
low damage threshold limits the applicable optical intensities. Also, it can be
highly desirable to use a crystal material which can be critically phasematched
at room temperature. Among the different types of nonlinear crystals, metal halides and
tartrates have attracted due to their importance in photonics. Metal halides like
lead halides have drawn attention because they exhibit interesting features from
the stand point of the electron-lattice interaction .These materials are important
for their luminescent properties. Tartrate single crystals show many interesting
physical properties such as ferroelectric, piezoelectric, dielectric and optical
characteristics. They are used for nonlinear optical devices based on their optical
transmission characteristics. Among the several tartrate compounds, Strontium
tartrate, Calcium tartrate and Cadmium tartrate have received greater attention
on account of their ferroelectric, nonlinear optical and spectral characteristics.
The present thesis reports the linear and nonlinear aspects of these crystals and
their potential applications in the field of photonics.
Santhi Ani, Joseph; Gaurav, Sharma; Misha, Hari; Mathew, S; Radhakrishnan, P; Nampoori, V P N(Optical Society of America, 2010)
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Abstract:
We demonstrate the possibility of realizing, all-optical switching in gold nanosol. Two overlapping laser beams are used for this purpose, due to which a low-power beam passing collinear to a high-power beam will undergo cross phase modulation and thereby distort the spatial profile. This is taken to advantage for performing logic operations. We have also measured the threshold pump power to obtain a NOT gate and the minimum response time of the device. Contrary to the general notion that the response time of thermal effects used in this application is of the order of milliseconds, we prove that short pump pulses can result in fast switching. Different combinations of beam splitters and combiners will lead to the formation of other logic functions too.