Joydas,T V; Damodaran,R(School of Marine Sciences, 2002)
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Abstract:
The work was carried out with an objective to know the quantitative and qualitative nature of the macrobenthos in relation to the existing hydrographical parameters and sediment characteristics. With the above two cruises were conducted to collect materials. Representative samples were collected from each degree square of the western continental shelf. The study deals with the hydrographic parameters. The bottom water temperature, salinity and dissolved oxygen were measured. The findings showed variations according to depth and latitude. The study gives the details of sediment characteristics of the study area. 7 different types of substrata were noticed. It also explains the macro faunal composition and diversity, and the standing stock of macrobenthos. The wet-weight and numerical abundance of macrobenthic groups are included. The thesis discusses the relation between hydrography and macrobenthos, and sediment characteristics and macrobenthos, based on the results obtained by statistical analysis of the data. It also investigates the relation between macrobenthos and fishery.
Manoj, Easwaran potti; Prathapachandra Kurup, M R; Fun, Hoong-Kun(Elsevier, 2007)
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A novel N4O coordination mode offers carbohydrazone ligands as a building block for interesting frameworks through self-assembly. Bridging mode of oxygen of bis(2-benzoylpyridine ketone) carbohydrazone (H2L) with metal centers facilitates the formation of the macrocyclic molecular square [Zn(HL)]4(BF4)4 · 10H2O, offers wide range of applications for carbohydrazones.
Anantharaman, M R; Soloman, M A; Joy, P A; Philip, Kurian(CSIR, July 5, 2005)
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Fine particles of barium ferrite (BaFe12O19) belonging to the M-type hexagonal ferrites were prepared by the
conventional ceramic techniques. They were incorporated into a nitrile rubber matrix according to a specific recipe for
various loadings to produce rubber ferrite composites (RFC). The percolation threshold is not reached for a maximum
loading of 130 phr (parts per hundred rubber). Here in this paper, the magnetic properties and processability of the nitrile
rubber based RFCs containing barium ferrite (BaF) and HAF carbon black is reported. The magnetic properties of the
ceramic ferrite and these rubber ferrite composites were evaluated and it was found that the coercivity values of RFCs were
less than that of the ceramic BaF, but remained constant with the loading of both the ferrite filler and carbon black.
However, other properties like saturation magnetization and magnetic remanence increased with the loading of ferrite filler.
Description:
Indian Journal of Chemical Technology
Vol. 12, September 2005, pp. 582-587
Anantharaman, M R; Malini, K A; Sindhu, S; Mohamed, E M; Joy, P A; Date, S K; Kulkarni, S D; Kurian, P(Kluwer Academic Publishers, 2001)
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Abstract:
Polycrystalline single phasic mixed ferrites belonging to the series Ni1−xZnxFe2O4 for
various values of x have been prepared by conventional ceramic techniques.
Pre-characterized nickel zinc ferrites were then incorporated into a natural rubber matrix
according to a specific recipe for various loadings. The processability and cure parameters
were then determined. The magnetic properties of the ceramic filler as well as the ferrite
loaded rubber ferrite composites (RFC) were evaluated and compared. A general equation
for predicting the magnetic properties was also formulated. The validity of these equations
were then checked and correlated with the experimental data. The coercivity of the RFCs
almost resemble that of the ceramic component in the RFC. Percolation threshold is not
reached for a maximum loading of 120 phr (parts per hundred rubber by weight) of the
filler. These studies indicate that flexible magnets can be made with appropriate magnetic
properties namely saturation magnetisation (Ms) and magnetic field strength (Hc) by a
judicious choice of x and a corresponding loading. These studies also suggest that there is
no possible interaction between the filler and the matrix at least at the macroscopic level.
The formulated equation will aid in synthesizing RFCs with predetermined magnetic
Description:
JOURNAL OF MATERIALS SCIENCE 36 (2001) 5551 – 5557
Anantharaman, M R; Pookat, G; Hysen, T; Al-Omari, I A; Al-Harthi, S H; Lisha, R; Avasthi, D K(Elsevier, June 10, 2013)
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We have investigated the effects of swift heavy ion irradiation on thermally evaporated 44 nm thick,
amorphous Co77Fe23 thin films on silicon substrates using 100 MeV Ag7+ ions fluences of 1 1011 ions/
cm2, 1 1012 ions/cm2, 1 1013 ions/cm2, and 3 1013 ions/cm2. The structural modifications upon
swift heavy irradiation were investigated using glancing angle X-ray diffraction. The surface morphological
evolution of thin film with irradiation was studied using Atomic Force Microscopy. Power spectral
density analysis was used to correlate the roughness variation with structural modifications investigated
using X-ray diffraction. Magnetic measurements were carried out using vibrating sample magnetometry
and the observed variation in coercivity of the irradiated films is explained on the basis of stress relaxation.
Magnetic force microscopy images are subjected to analysis using the scanning probe image processor
software. These results are in agreement with the results obtained using vibrating sample
magnetometry. The magnetic and structural properties are correlated
Description:
Nuclear Instruments and Methods in Physics Research B 310 (2013) 81–86
Prema, K H; Dr. Philip, Kurian(Cochin University of Science and Technology, September , 2007)
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In the present study the preparation and characterisation of rubber ferrite
composites containing nickel ferrite and gamma ferric oxide have been dealt with.Synthetic rubbers viz. ethylene propylene diene rubber and neoprene rubber were used
for the incorporation of nickel ferrite and gamma ferric oxide for the synthesis of
RFCs. Incorporation of ferrites were carried out according to a specific recipe for
various loadings of the magnetic fillers. The ferrites used for the preparation of RFCs
were synthesised using sol-gel method and structural characterisation was carried out.
Experimental techniques like X-ray diffraction, Transmission electron microscopy and
other analytical techniques were used for this. Precharaterised ferrites were then
incorporated at different loading into rubber according to conventional mixing
methods. The cure characteristics, mechanical, dielectric, magnetic and microwave
properties of these composites were evaluated. The effect of carbon black on these
properties of RFCs were carried out.
Description:
Department of Polymer Science and Rubber Technology,
Cochin University of Science & Technology
Anantharaman, M R; Nampoori, V P N; Abraham, V S; Rajesh, S; Swapna, Nair S(Elsevier, December 27, 2005)
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Abstract:
Fine magnetic particles (sizeffi100A ˚ ) belonging to the series ZnxFe1 xFe2O4 were synthesized by cold co-precipitation methods and
their structural properties were evaluated using X-ray diffraction. Magnetization studies have been carried out using vibrating sample
magnetometry (VSM) showing near-zero loss loop characteristics. Ferrofluids were then prepared employing these fine magnetic powders
using oleic acid as surfactant and kerosene as carrier liquid by modifying the usually reported synthesis technique in order to induce
anisotropy and enhance the magneto-optical signals. Liquid thin films of these fluids were prepared and field-induced laser transmission
through these films was studied. The transmitted light intensity decreases at the centre with applied magnetic field in a linear fashion
when subjected to low magnetic fields and saturate at higher fields. This is in accordance with the saturation in cluster formation. The
pattern exhibited by these films in the presence of different magnetic fields was observed with the help of a CCD camera and was
recorded photographically
Description:
Journal of Magnetism and Magnetic Materials 305 (2006) 28–34
Swapna, Nair S; Rajesh, S; Abraham, V S; Anantharaman, M R; Nampoori, V P N(Elsevier, 2006)
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Abstract:
Fine magnetic particles (size≅100 Å) belonging to the series ZnxFe1−xFe2O4 were synthesized by cold co-precipitation methods and their structural properties were evaluated using X-ray diffraction. Magnetization studies have been carried out using vibrating sample magnetometry (VSM) showing near-zero loss loop characteristics. Ferrofluids were then prepared employing these fine magnetic powders using oleic acid as surfactant and kerosene as carrier liquid by modifying the usually reported synthesis technique in order to induce anisotropy and enhance the magneto-optical signals. Liquid thin films of these fluids were prepared and field-induced laser transmission through these films was studied. The transmitted light intensity decreases at the centre with applied magnetic field in a linear fashion when subjected to low magnetic fields and saturate at higher fields. This is in accordance with the saturation in cluster formation. The pattern exhibited by these films in the presence of different magnetic fields was observed with the help of a CCD camera and was recorded photographically.
Hari Sankar, H S; Babu,Philip(Cochin University of Science and Technology, December 30, 2013)
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Abstract:
The major digestive enzyme activities and digestive indices were compared between
Etroplus suratensis and Oreochromis mossambicus. Pepsin - like acid proteases that acts on low pH has been identified all along the digestive tract of both the fishes. Comparatively low alpha amylase activity is shown by the E. suratensis and the enzyme is distributed almost equally throughout the intestinal segments in both the species. Very low alkaline protease activity is found in the stomach of both the
fishes and in O. mossambicus, the enzyme activity diminishes extensively towards the posterior portion of the intestine whereas in E. suratensis the activity increases towards the posterior part. The present study showed that lipase is one of the prominent digestive enzymes in O. mossambicus with a remarkable specific activity throughout the digestive tract than that of E. suratensis .It has been noted that O. mossambicus has a higher values for digestive somatic index, hepato somatic index, intestinal coefficient and gut Vs standard length ratio than that of E. suratensis indicating its higher digestive and metabolic capabilities. The early maturity and fast growth of O. mossambicus can be explained by their enhanced digestive indices. The compa ratively low activities of acid protease, amylase, lipase and total alkaline protease of E. suratensis revealed poor digestive capacity than that of O. mossambicus
Development of Malayalam speech recognition system is in its infancy stage; although many works have
been done in other Indian languages. In this paper we present the first work on speaker independent
Malayalam isolated speech recognizer based on PLP (Perceptual Linear Predictive) Cepstral Coefficient
and Hidden Markov Model (HMM). The performance of the developed system has been evaluated with
different number of states of HMM (Hidden Markov Model). The system is trained with 21 male and
female speakers in the age group ranging from 19 to 41 years. The system obtained an accuracy of 99.5%
with the unseen data
Description:
International Journal of Advanced Information Technology (IJAIT) Vol. 1, No.5, October 2011
Gangadharan Nair, R; Dr.George, C M(Cochin University of Science and Technology, October 4, 1988)
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Economists consider education as an investment in man. Education develops human resources necessary for the economic and political growth of any nation. Adam Smith stressed the importance of education and included the acquired and useful activities of all the inhabitants or members of society in his concept of fixed capital.‘ Karl Marx shared with Smith's view when he laid down that the function of education in a socialist society will be to overcome the alienation of the worker from the means of production; while developing the technical skill it will make him a complete man as well as a producer.2 Education is also considered as a powerful instrument for social change. By inculcating moral and spiritual values, it brings changes both in the individual and in the society. It aims at creating a social order founded on the values of freedom, social justice and equal opportunity.3 The objective of this exploratory study is to enquire into the existing system of managing higher educational institutions in Kerala, compare it with the accepted principles of management believed to be applicable to all organisations, and develop a model capable of introducing more effective management practices
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School of Management Studies, Cochin University of Science and Technology
Madhusoodanan Pillai, P; Dr.Chandrasekharan Pillai, N(Cochin University of Science and Technology, March 10, 1993)
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The general objective of the study is to examine in depth the organisation and management practices of newspaper industry in Kerala with particular reference to the marketing aspects, with a View to suggesting measures for improving the economics and the managerial efficiency of the industry. The detailed investigation into the management aspects of the industry is done with particular reference to the two most popular Malayalam dailies in Kerala, namely, the Malayala Manorama and the Mathrubhumi. The purposeful selection of these two papers for the study is amply justified as these two dailies together account for about 80 percent of the total circulation of the newspapers in Kerala. Technically speaking, both these papers are owned by organisations registered as public limited companies and are, to a large extent professionally managed. The Malayala Manorama, though a public limited company in principle, functions, however, more or less as a private company or a family concern. These two papers therefore provide a scope for studying the management of newspaper industry practically under two different organisational set up, namely private limited company and public limited company The study has been divided into eight chapters. Chapter-I spells out an introduction about the newspaper industry and its unique features.Chapter-II, deals with a review of literature, objective, scope, methodology and limitations of the study. Chapter-III deals with origin, growth and status of newspaper industry. Chapter—IV examines the cost, revenue and profitability of the Malayala Manorama and Mathrubhumi. Chapter-V deals with the Organisation and Management. Chapter-VI examines the Marketing Management of Newspapers. Chapter-VII deals with the Marketing Strategy and Performance of Malayala Manorama and Mathrubhumi: An Assessment. Chapter-VIII presents the main findings of the study.
Description:
School of Management Studies, Cochin University of
Science and Technology