Kannan, Balakrishnan; Manoj, Changat; Henry, Martyn Mulder(Econometric Institute Research Papers, October 1, 2007)
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Abstract:
Following the Majority Strategy in graphs, other consensus strategies, namely
Plurality Strategy, Hill Climbing and Steepest Ascent Hill Climbing strategies on
graphs are discussed as methods for the computation of median sets of pro¯les. A
review of algorithms for median computation on median graphs is discussed and
their time complexities are compared. Implementation of the consensus strategies
on median computation in arbitrary graphs is discussed
Description:
Report/Econometric Institute, Erasmus University Rotterdam,EI 2007-34
Devarajan, G; Dr.Sridhar, C S(Cochin University of Science and Technology, January 30, 1987)
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Abstract:
Median filtering is a simple digital non—linear signal
smoothing operation in which median of the samples in a sliding
window replaces the sample at the middle of the window. The
resulting filtered sequence tends to follow polynomial
trends in the original sample sequence. Median filter preserves
signal edges while filtering out impulses. Due to this property,
median filtering is finding applications in many areas of image
and speech processing. Though median filtering is simple to
realise digitally, its properties are not easily analysed with
standard analysis techniques,
Description:
Department of Electronics, Cochin
University of Science and Technology
Kannan, Balakrishnan; Sandi, Klavzar; Manoj, Changat(Elsevier, December 31, 2007)
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Abstract:
The median of a profile = (u1, . . . , uk ) of vertices of a graph G is the set of vertices x that minimize the sum of distances
from x to the vertices of . It is shown that for profiles with diameter the median set can be computed within an isometric
subgraph of G that contains a vertex x of and the r -ball around x, where r > 2 − 1 − 2 /| |. The median index of a graph
and r -joins of graphs are introduced and it is shown that r -joins preserve the property of having a large median index. Consensus
strategies are also briefly discussed on a graph with bounded profiles.
A periphery transversal of a median graph G is introduced as a set of vertices
that meets all the peripheral subgraphs of G. Using this concept, median graphs
with geodetic number 2 are characterized in two ways. They are precisely
the median graphs that contain a periphery transversal of order 2 as well as
the median graphs for which there exists a profile such that the remoteness
function is constant on G. Moreover, an algorithm is presented that decides
in O(mlog n) time whether a given graph G with n vertices and m edges is a
median graph with geodetic number 2. Several additional structural properties
of the remoteness function on hypercubes and median graphs are obtained and
some problems listed
Description:
University of Ljubljana
Institute of Mathematics, Physics and Mechanics
Department of Mathematics
Preprint series, Vol. 46 (2008), 1046
Kannan, Balakrishnan; Ram Kumar, r(Hindawi Publishing Corporation, October 18, 2012)
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Abstract:
A profile is a finite sequence of vertices of a graph. The set of all vertices of the graph which
minimises the sum of the distances to the vertices of the profile is the median of the profile. Any
subset of the vertex set such that it is the median of some profile is called a median set. The number
of median sets of a graph is defined to be the median number of the graph. In this paper, we identify
the median sets of various classes of graphs such as Kp − e, Kp,q forP > 2, and wheel graph and so
forth. The median numbers of these graphs and hypercubes are found out, and an upper bound for
the median number of even cycles is established.We also express the median number of a product
graph in terms of the median number of their factors.
Description:
International Scholarly Research Network
ISRN Discrete Mathematics
Volume 2012, Article ID 583671, 8 pages
doi:10.5402/2012/583671
Sadasivan Nair,G; Dr.Leelakrishnan, P(Cochin University of Science and Technology, June , 1983)
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Abstract:
This is a study in criminal law. The problem probed is the relationship between mental abnormality and criminal responsibility. The subject is yet an unsolved area in criminal jurisprudence. It is of great interest to many jurists lawyers philosophers and psychiatrists. The study lays special emphasis on the Indian law .Comparative assessment wherever found necessary,especially of positions in England ,United states and Germany is made. The thesis is in six parts and sixteen chapters.
Description:
School of Legal Studies,Cochin University of Science And Technology
Anantaraman, R; Sugunan, S(Indian Journal of Chemistry, August , 1982)
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Abstract:
Kinetics of mercuric chloride catalysed solvolysis of benzyl chloride have been studied in water. 10% aq. ethanol, 10,20 and
30% aq. acetone and 20% aq. DMSO. The results confirm the operation of a mass law effect.
Jasmine, P; Dr.Saramma, Panampunnayil U(Cochin University Of Science And Technology, January 16, 2009)
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Abstract:
The Arabian Sea and the Bay of Bengal are both highly
dynamic ecosystems, due to the seasonally reversing monsoon winds,
but the processes affecting the mesozooplankton community remain
poorly understood. These are important basins exhibiting enhanced
biological production as a result of upwelling, winter cooling and
other episodic events such as eddies and gyres. Zooplankters are
primarily the prey for almost all fish larvae. Seasonal changes in the
biogeochemical processes can strongly affect zooplankton density
and distribution, which in turn, strongly affect the larval growth, and
consequently, the pelagic fish recruitment. It is clear that plankton
biomass and biogeochemical fluxes are not in steady state. Acoustic
data on mesozooplankton abundance suggests that they also exist in
the mesopelagic zone. Earlier studies were confined only to the upper
200 m and hence the structure of mesozooplankton community in the
deeper layers was not well known. Copepods are the dominant
mesoplankton group, and therefore the majority of the studies were
focused on them. The planktonic ostracods are the second major
crustacean group and at times, their swarms can outnumber all other
planktonic groups. The understanding of the community structure of
the ostracods is essential to establish their role in the marine food
web. Mesozooplankton is responsible for the vertical flux of organic
matter produced by phytoplankton and is assumed to be equivalent to
new production (Eppley & Peterson, 1979). Since the fate of newly
produced organic matter depends upon their consumers, the
zooplankton biomass must be estimated in size fractions or
taxonomic components to understand the vertical flux of organic
carbon. It is thus important to update our knowledge on different
groups of zooplankton on the basis of seasonal and temporal
distribution. The distribution in space and time is essential for
modeling the carbon cycling that structure the marine ecosystems
Description:
Department Of Marine Sciences,Cochin
University of Science and Technology
Poulose Jacob,K; Sheena, Mathew(IEEE, December 20, 2006)
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Abstract:
The focus of this work is to provide authentication and
confidentiality of messages in a swift and cost effective manner to
suit the fast growing Internet applications. A nested hash
function with lower computational and storage demands is
designed with a view to providing authentication as also to
encrypt the message as well as the hash code using a fast stream
cipher MAJE4 with a variable key size of 128-bit or 256-bit for
achieving confidentiality. Both nested Hash function and MAJE4
stream cipher algorithm use primitive computational operators
commonly found in microprocessors; this makes the method
simple and fast to implement both in hardware and software.
Since the memory requirement is less, it can be used for
handheld devices for security purposes.
Description:
Advanced Computing and Communications, 2006. ADCOM 2006. International Conference on
Rajendran, C G; Dr.Damodaran,R(Cochin University of Science & Technology, 1995)
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Abstract:
The investigation was aimed at establishing the effect of salinity on the culture performance of Peneus Indicus in pokkali fields and also to find out the growth performance of the shrimp at varying salinities. The experiments were laid out at Rice Research Station, Vyttila of Kerala Agriculture University in three fields of area 1000 m2 each. The results of the experiment clearly establish that shrimps when stocked at higher salinity (20-25 ppt) for 45 days has given higher growth, survival and production than those stocked at lower salinity (10-15 ppt) in all the above parameters even when the culture experiment was maintained for longer periods in lower salinity. In the prolonged culture experiments conducted for 120 days in 10-25 ppt salinity, the results were poorer than the short period culture in higher salinity and the production values similar to lower saline culture. This clearly establishes the importance of salinity as an ecological factor which will have profound influence in shrimp farming operations.
Description:
Division of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology
Baiju,K R; Nambiar,C G(Cochin University of Science and Technology, September , 2006)
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Abstract:
The present research is aimed at studying the charnockites and associated rocks of the Madurai Granulite Block (MGB), especially in terms of their field settings, texture, mineralogy, and mineral chemistry analyzing their petrogenesis with the help of thermobarometrical studies and geochronological constraints. The mechanism of charnockitization by the influx of CO2 rich fluids and its relation to the graphite mineralization is actually a matter of discussion and study. The objectives of the present study are, to delineate petrological and structural relationship of charnockites and associated gneissic rocks, to study the field and petrogenetic aspects of graphite mineralization in the MGB, to establish and re-evaluate the P-T conditions of formation of the rocks with the aid of thermbarometric computations and to compare with the earlier studies, characterization of graphite with XRD, Raman spectroscopy and isotope studies together with a search in to its genesis and its relation to the high-grade metamorphism of the terrain, to evaluate the role of CO2 bearing fluids in the processes of charnockitization as well as in the genesis of graphite within the high-grade terrain and to delineate the metamorphic geochronology of selected rocks using ‘monazite dating’ technique with EPMA.
Ambika, G; Nandakumaran, V M; Babu Joseph,K(World Scientific Publishing Company, 1991)
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Abstract:
We consider a resistively shunted Josephson junction with a resistance that depends inversely on voltage. It is shown that such a junction in the underdamped case can give rise to extremely long-lived metastable states even in the absence of external noise. We investigate numerically this metastable state and its transition to a chaotic state. The junction voltages corresponding to these states are studied.
Dr.Babu, C A; Soltani, M.; Mofidi, A(Springer-Verlag Wien 2014, January 14, 2014)
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Abstract:
During the period from 12 to 15 April, 2009
nearly the entire Iran, apart from the southern border, experienced
an advective cooling event. While winter freezing
concerns are typical, the nature of this freezing event was
unusual with respect to its date of occurrence and accompanying
synoptic meteorological situation. To analyze the
freezing event, the relevant meteorological data at multiple
levels of the atmosphere were examined from the NCEP/
NCAR reanalysis dataset. The results showed that a polar
vortex was responsible for the freezing event over the country
extending southward extraordinarily in such a way that its
ridge influenced most parts of Iran. This was recognized as an
abnormal extension of a polar vortex in the recent years. The
sea-level pressure fields indicated that a ridge of large-scale
anticyclone centered over Black Sea extended southward and
prevailed over most parts of Iran. This resulted in the formation
of a severe cold air advection from high latitudes (Polar
region) over Iran. During the study period, moisture pumping
was observed from the Arabian Sea and Persian Gulf. The
winds at 1000 hPa level blew with a magnitude of 10 m s-1
toward south in the region of convergence (between
-2 9 10-6 s-1 and -12 9 10-6 s-1). The vertical profilesof temperature and humidity also indicated that the ICE
structural icing occurred at multiple levels of the atmosphere,
i.e, from 800 hPa through 400 hPa levels. In addition to the
carburetor (or induction), icing occurred between 900 and
700 hPa levels in the selected radiosonde stations during the
study period. In addition, the HYSPLIT backward trajectory
model outputs were in quite good agreement with the
observed synoptic features
Babu,C A; Asha, Philip S; Hareeshkumar, P V(www.elsevier.com/, August 15, 2013)
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Abstract:
The study mainly intends to investigate the meteorological aspects associated with the formation of mud
banks along southwest coast of India. During the formation of mud bank, the prominent monsoon
organized convection is located in the equatorial region and relatively low clouding over Indian
mainland. The wind core of the low level jet stream passes through the monsoon organized convection.
When the monsoon organized convection is in the equatorial region, the low level wind over the
southwest coast of India is parallel to the coastline and toward south. This wind along the coast gives rise
to Ekman mass transport away from the coastline and subsequently formation of mud bank, if the high
wind stress persists continuously for three or more days. As a result of the increased alongshore wind
stress, the coastal upwelling increases. An increase in chlorophyll-a concentration and total chlorophyll
can also be seen associated with mudbank formation
Nampoori, V P N; Senoy, Thomas; Jinesh, Mathew; Radhakrishnan, P; George, A K; Al-Harthi,R V; Ramanujan, R V; Anantharaman, M R(Sensors and Actuators: A Physical, May 11, 2010)
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Abstract:
Metallic glass alloy Metglas 2826 MB based amorphous magnetic thin films were
fabricated by the thermal evaporation technique. Transmission electron micrographs and
electron diffraction pattern showed the amorphous nature of the films. Composition of
the films was analyzed employing x-ray photoelectron spectroscopy and energy
dispersive x-ray spectroscopy techniques. The film was integrated to a long period fibre
grating. It was observed that the resonance wavelength of the fibre grating decreased with
an increase in the magnetic field. Change in the resonance wavelength was minimal at
higher magnetic fields. Field dependent magnetostriction values revealed the potential
application of these films in magnetostrictive sensor devices