Bijoy, Nandan S; Sreedevi, O K; Jayachandran, P R(NATL INST SCIENCE COMMUNICATION-NISCAIR, April , 2012)
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Abstract:
Present study focussed on the water quality status in relation to various anthropogenic activities in the Kodungallur-
Azhikode Estuary (KAE). Average depth of the estuary was 3.6 ± 0.2 m with maximum of 4.3 ± 0.4 m in the estuarine
mouth. Dissolved oxygen showed an average of 5.1±1 mg/l in the water column, whereas the highest BOD value was
noticed during monsoon period (3.1 ± 0.8 mg/l) which could be due to high organic enrichment in the water column. pH
displayed slightly alkaline condition in most of the stations and it varied from 7.2 ± 0.5 in Station 7 to 7.5 ± 0.5 in Station 1.
Salinity in the estuary displayed mixo-mesohaline nature with clear vertical stratification. High river discharge could have
resulted in nutrients and silt loading into the estuary, which makes a highly turbid water column particularly during the
monsoon period, which limits light penetration and subsequent primary productivity. Turbidity in the water column showed
an average of 20.2 ± 15.8 NTU. Estuary was nitrogen limited during post and pre monsoon periods. Nitrate-nitrogen content
in the estuarine water gave negative correlation with ammonia.
Description:
Indian Journal of Geo-Marine Sciences
Vol. 41 (2), April 2012, pp. 180-187
Peter, Varkey K; Dr.Sivasankara Pillai, V N(Cochin University of Science and Technology, December , 2002)
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Abstract:
The Kerala Water Authority requested the School of Environmental Studies to
carry out investigations on the mechanism of sporadic mobilization of iron and
odour in the raw water drawn to the drinking water treatment plant. The
currently used treatment process failed to remove iron completely. This led to
problems in the filter and complaints of taste and colour due to iron in the
finished water. The sporadic nature of the problem itself made the trouble
shooting difficult.
The problem was looked in from three points of view.
1. Influence of environmental (climatic) conditions on the dynamics of
the relevant basin of the reservoir.
2. Influence of the physical dynamics on the physico — chemical quality
of water.
3. Identification of cost-effective treatment processes to suit the existing
plant.
Since the problem emerged only during the post- monsoon to pre-monsoon
months, a related problem was investigated, namely, influence of anions on
the oxidation of Fe(II) in natural waters by air. This is presented in Part II of
the dissertation.
Description:
School of
Environmental Studies, Cochin University of Science and Technology
Soman, C K; Dr.Jose, Kallarackal(Cochin University of Science And Technology, May , 1997)
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Abstract:
Investigations on the water relations and gas exchange of/tcacia aun'culiji_2rmis
were carried out in natural and controlled environments. The experiments were
performed in both seedlings and five year old trees. Different sets of experiments
were conducted in Acacia plantations, at Kothachira, Palakkad District and in
.seedlings, at KFRI campus nursery mainly during the summer months. Investigations
were also extended to seedlings of A.mangium, Aaulacocarpa and /Lholocericea,
which are also phyllodinous species with the intention of comparing their physiology
with Acacia auriculifomus.
Potted seedlings of four species of Acacia viz., A. auriculi/E)/7r:i.r, /I.
aulacocarpa, A. holocericea and A. mangium were used for the study.
Measurements of relative water content (RWC), water potential, photosynthetic rate,
transpiration, stomatal conductance, water use efficiency etc. of phyllodes were
measured diumally in plants subjected to three stress conditions namely, drought,
salinity and flooding
Kurian,N P; Dr.Baba, M(Cochin University Of Science And Technology, July 2, 1987)
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Abstract:
There are basically two methods for prediction of
shallow water waves, viz. the graphical method and the
numerical method. The numerical methods are being widely
used, now—a—days, because they are fast, accurate and are
especially useful when the prediction over a large spatial
frame is required. Practically little has been done on the
development of numerical models for the prediction of height
and spectral transformation of waves as applicable to our
coasts. Synchronized deep and shallow water wave measurements
which are essential for study of wave transformation are
very much lacking for our coasts. Under these
circumstances, a comprehensive study of the wave
transformation in the shallow waters of our coast was felt
very important and is undertaken in the present
investigation.
Description:
Centre for Earth Science
Studies,Cochin University Of Science And Technology
Kannan, Balakrishnan; Anil, Kumar; Sindhumol, S(IEEE, April , 2013)
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Abstract:
Multispectral analysis is a promising approach in
tissue classification and abnormality detection from Magnetic
Resonance (MR) images. But instability in accuracy and
reproducibility of the classification results from conventional
techniques keeps it far from clinical applications. Recent studies
proposed Independent Component Analysis (ICA) as an effective
method for source signals separation from multispectral MR data.
However, it often fails to extract the local features like small
abnormalities, especially from dependent real data. A multisignal
wavelet analysis prior to ICA is proposed in this work to resolve
these issues. Best de-correlated detail coefficients are combined
with input images to give better classification results.
Performance improvement of the proposed method over
conventional ICA is effectively demonstrated by segmentation
and classification using k-means clustering. Experimental results
from synthetic and real data strongly confirm the positive effect
of the new method with an improved Tanimoto index/Sensitivity
values, 0.884/93.605, for reproduced small white matter lesions
Description:
International conference on Communication and Signal Processing, April 3-5, 2013, India
Rajesh, J; Dr.Mohan Kumar, K(Cochin University of Science and Technology, August 25, 2009)
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Abstract:
The Doctoral thesis focuses on the factors that influence the weather and climate
over Peninsular Indias. The first chapter provides a general introduction about the climatic features over peninsular India, various factors dealt in subsequent chapters, such as solar forcing on climate, SST variability in the northern Indian Ocean and its influence on Indian monsoon, moisture content of the atmosphere and its importance in the climate system, empirical formulation of regression forecast of climate and some aspects of regional climate modeling. Chapter 2 deals with the variability in the vertically integrated moisture (VIM) over Peninsular India on various time scales. The third Chapter discusses the influence of solar activity in the low frequency variability in the rainfall of Peninsular India. The study also investigates the influence of solar activity on the horizontal and vertical components of wind and the difference in the forcing before and after the so-called regime shift in the climate system before and after mid-1970s.In Chapter 4 on Peninsular Indian Rainfall and its association with meteorological and oceanic parameters over adjoining oceanic region, a linear regression model was developed and tested for the seasonal rainfall prediction of Peninsular India.
Description:
Department
of Atmospheric Sciences, Cochin University of Science and Technology
Santhosh Kumar, G(Cochin University of Science And Technology, June 23, 2010)
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Abstract:
Page 1. Web 2.0 Technologies for Education G. Santhosh Kumar Dept. Of Computer Science
Cochin University Page 2. What is Internet? CUSAT is linked to this Web through 10 Mbps leased
line connectivity Page 3. Size of the Web? GYWA = Sorted on Google, Yahoo!, Windows Live
Search (Msn Search) and Ask YGWA = Sorted on Yahoo!, Google, Windows Live Search (Msn
Search) and Ask www.worldwidewebsize.com Page 4. The Machine is Us/ing Us ■
http://in.youtube.com/watch?v=NLlGopyXT_g&feature=channel Page 5. ..
Santhosh Kumar, G(Cochin University of Science And Technology, June 23, 2010)
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Abstract:
Page 1. Webhosting and Networking G. Santhosh Kumar, Dept. of Computer Science Cochin
University of Science and Technology Page 2. Agenda What is a Network? Elements of a Network
Hardware Software Ethernet Technology World Wide Web Setting up a Network Conclusion Page
3. What is a Network? An interconnected system of things or people Purpose of a Network?
Resource Sharing Communication LANs have become the most popular form of Computer
Networks Page 4. Principle of Locality of Reference Temporal Locality of Reference ...
Archana, S N; Dr.Humayoon,Kabir S(Cochin University of Science and Technology, June , 2010)
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Abstract:
Websites of academic institutions are the prime source of information about
the institution. Libraries, being the main provider of information for the academics,
need to be represented in the respective homepages with due importance. Keeping
this in mind, this study is an attempt to understand and analyze the presence and
presentation of libraries of Engineering Colleges (EC) in Kerala in their respective
websites. On the basis of the reviewed literature and an observation of libraries of
nationally important institutions imparting technical education in India, a set of
criteria were developed for analyzing the websites/web pages. Based on this an extensive
survcy of the websites of ECs were done. The collected data was then analyzed
using Microsoft Excel. The library websites were then ranked on the basis of this
analysis. It was observed that majority of the websites of ECs in Kerala have least
representation of their respective libraries. Another important observation is that
even the highest scoring libraries satisfy only half of the criteria listed for analysis.
Manju, Kurian; Sugunan, S(Elsevier, January , 2006)
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Abstract:
Wet peroxide oxidation (WPO) of phenol is an effective means for the production of diphenols, which are of great industrial importance. An added advantage of this method is the removal of phenol from wastewater effluents. Hydroxylation of phenol occurs efficiently over mixed iron aluminium pillared montmorillonites. An initial induction period is noticed in all cases. A thorough study on the reaction variables suggests free radical mechanism for the reaction.
Manjusha, M; Dr.Bright Singh,I S(School of Environmental Studies,Faculty of Marine Sciences, 2003)
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Abstract:
The present study is the first comprehensive approach towards histopathology of White Spot Syndrome Virus (WSSV) in Penaeus indicus. WSSV could be demonstrated in the nuclei of all tissues, except those of midgut, subjected of electron microscopic observation. They were the nuclei of gill, foregut, heart, hepatopancreatic connective tissue, hindgut, nerve and dorsal aorta. A comparison was made between the electron microscopic and histopathological observations and a greater degree of correlation between the two in depicting the severity of the infection of the infection was unraveled. The study also illustrated variations in response and susceptibility of various tissues to WSSV infection. Accordingly, out of the tissues investigated, gill, foregut, hindgut and dorsal aorta exhibited advanced viral multiplication than the other tissues such as heart, midgut, nerve and hepatopancreas. Even though hepatocytes were not infected the connective tissue nuclei were packed with virions.
Mythili, P; Babita, Jose R; Jimson, Mathew; Pradhan, D K(IEEE, December 10, 2007)
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Abstract:
This work presents a wideband low-distortion sigmadelta
analog-to-digital converter (ADC) for Wireless Local Area
Network (WLAN) standard. The proposed converter makes use
of low-distortion swing suppression SDM architecture which is
highly suitable for low oversampling ratios to attain high
linearity over a wide bandwidth. The modulator employs a 2-2
cascaded sigma-delta modulator with feedforward path with a
single-bit quantizer in the first stage and 4-bit in the second stage.
The modulator is designed in TSMC 0.18um CMOS technology
and operates at 1.8V supply voltage. Simulation results show
that, a peak SNDR of 57dB and a spurious free dynamic range
(SFDR) of 66dB is obtained for a 10MHz signal bandwidth, and
an oversampling ratio of 8.
Description:
Information, Communications & Signal Processing, 2007 6th International Conference on
Lethakumary,B; Sreedevi, Menon K; Priya,Francis; Aanandan,C K; Mohanan, P(Microwave and Optical Technology Letters, January 20, 2005)
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Abstract:
In this paper, we introduce a novel feeding technique for
bandwidth enhancement of a rectangular microstrip antenna This antenna
offers an impedance bandwidth of 22% without degrading the effciencv.
The effect of the feed parameters upon patch characteristics
such as resonant frequency, impedance bandwidth, and radiation pattern are studied in detail. The experimental results are verified using the
FDTD results
Sreedevi, Menon K; Lethakumary,B; Mohanan, P; Bijumon, P V; Sebastian,M T(Microwave and Optical Technology Letters, August 20, 2004)
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Abstract:
A broadband cylindrical dielectric resonator antenna
(DRA) energized with an L-strip feed is presented The novel exciting
technique achieves a 2:1 VSWR bandwidth of 18%. The variation of
bandwidth for different feed parameters is also studied
The design and development of an L-band printed dipole antenna.
optimized for wide-band applications near first resonance, is reported.
This design has achieved more than 48% impedance bandwidth
(VSWR 2:1), without degrading its overall radiation efficiency
Sarin, V P; Nisha, Nassar; Deepu, V; Aanandan,C K; Mohanan, P; Vasudevan, K(Antennas and Wireless Propagation Letters, IEEE, 2009)
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Abstract:
A simple electromagnetically coupled wideband printed microstrip antenna having a 2:1 VSWR bandwidth of 38% covering the 5.2/5.8-GHz WLAN, HIPERLAN2, and HiSWANa communication bands is presented. The large bandwidth is obtained by adding a rectangular metal strip on a slotted square microstrip antenna. The antenna occupies an overall dimension of 42 times 55 times 3.2 mm3 when printed on a substrate of dielectric constant 4. It exhibits good radiation characteristics and moderate gain in the entire operating band. Details of the design along with experimental and simulation results are presented and discussed.