Abstract: | importance of fishing and other allied industries in the economy was realised only very recently. Consequently only very few studies are available on the subject. Here an attempt is made to survey the available literature on the subject. |
Description: | Department Of Applied Economics Cochin University Of Science And Technoogy |
URI: | http://dyuthi.cusat.ac.in/purl/3843 |
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Dyuthi-T1774.pdf | (5.616Mb) |
URI: | http://dyuthi.cusat.ac.in/purl/1333 |
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Rajasenan D 1987.PDF | (690.7Kb) |
Abstract: | Result of the study on traditional traps in the inland waters of three northern districts viz, Kasargod, Kannur and Kozhikode in Kerala state during 2003-2004 is presented. Mainly six types of traps are found in operation. Chempally koode is a rectangular bamboo trap with" D" shape in cross section operated without bait in some rivers of Kannur and Kasargod. Bamboo screen barriers are almost completely replaced with durable HDPE net screen to make handling easy. Thottil vala is a unique aerial trap operated from the dam in Pazhassi reservoir during monsoon to catch big fishes jumping against flowing water. |
Description: | fishery technology,2008 vol 45(2)pp 137-146 |
URI: | http://dyuthi.cusat.ac.in/purl/4131 |
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Fish traps in inland waters of north kerala.pdf | (720.4Kb) |
Abstract: | Invertase was immobilized on acid activated montmorillonite via two independent procedures, adsorption and covalent binding. The immobilized enzymes were characterized by XRD, NMR and N2 adsorption measurements and their activity was tested in a fixed bed reactor. XRD revealed that the enzyme was situated on the periphery of the clay and the side chains of different amino acid residues were involved in intercalation with the clay matrix. NMR demonstrated that tetrahedral Al was linked to the enzyme during adsorption and the octahedral Al was involved during covalent binding. Secondary interaction of the enzyme with Al was also observed. N2 adsorption studies showed that covalent binding of enzymes caused pore blockage since the highly polymeric species were located at the pore entrance. The fixed bed reactor proved to be efficient for the immobilized invertase. The optimum pH and pH stability improved upon immobilization. The kinetic parameters calculated also showed an enhanced efficiency of the immobilized systems. They could be used continuously for long period. Covalently bound invertase demonstrated greater operational stability. |
URI: | http://dyuthi.cusat.ac.in/purl/2270 |
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Dyuthi-SS60.pdf | (481.4Kb) |
Abstract: | Decimal multiplication is an integral part of financial, commercial, and internet-based computations. A novel design for single digit decimal multiplication that reduces the critical path delay and area for an iterative multiplier is proposed in this research. The partial products are generated using single digit multipliers, and are accumulated based on a novel RPS algorithm. This design uses n single digit multipliers for an n × n multiplication. The latency for the multiplication of two n-digit Binary Coded Decimal (BCD) operands is (n + 1) cycles and a new multiplication can begin every n cycle. The accumulation of final partial products and the first iteration of partial product generation for next set of inputs are done simultaneously. This iterative decimal multiplier offers low latency and high throughput, and can be extended for decimal floating-point multiplication. |
Description: | Parallel and Distributed Processing with Applications, 2008. ISPA'08. International Symposium on |
URI: | http://dyuthi.cusat.ac.in/purl/3874 |
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Fixed Point Dec ... on using RPS Algorithm.pdf | (424.3Kb) |
Abstract: | Flexile single layer electromagnetic wave absorbers were designed by incorporating appropriate amounts of carbon black in a nitrile butadiene rubber matrix along with an optimized amount of magnetic counterpart, namely, barium hexaferrite for applications in S, C, and X-bands. Effective dielectric permittivity and magnetic permeability were measured using cavity perturbation method in the frequency range of 2–12 GHz. The microwave absorbing characteristics of the composites were studied in the S, C, and X-bands employing a model in which an electromagnetic wave is incident normally on a metal terminated single layer. Reflection loss exceeding 20 dB is obtained for all the samples in a wide frequency range of 2–12 GHz when an appropriate absorber thickness between 5 and 9mm is chosen. The impact of carbon black is clearly observed in the optimized composites on the mechanical strength, thickness, band width of absorption, dielectric properties, |
Description: | J. Appl. Phys. 116, 024902 (2014) |
URI: | http://dyuthi.cusat.ac.in/purl/4426 |
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Flexible microw ... 2–12 GHz applications.pdf | (2.341Mb) |
Abstract: | This paper gives the details of flexure-shear analysis of concrete beams reinforced with GFRP rebars. The influence of vertical reinforcement ratio, longitudinal reinforcement ratio and compressive strength of concrete on shear strength of GFRP reinforced concrete beam is studied. The critical value of shear span to depth ratio (a/d) at which the mode of failure changes from flexure to shear is studied. The fail-ure load of the beam is predicted for various values of a/d ratio. The prediction show that the longitudinally FRP reinforced concrete beams having no stirrups fail in shear for a/d ratio less than 9.0. It is expected that the predicted data is useful for structural engineers to design the FRP reinforced concrete members. |
Description: | CICE 2010 - The 5th International Conference on FRP Composites in Civil EngineeringSeptember 27-29, 2010 Beijing, China |
URI: | http://dyuthi.cusat.ac.in/purl/4541 |
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Flexure-shear A ... nforced with GFRP bars.pdf | (152.1Kb) |
Abstract: | In this thesis the author has presented qualitative studies of certain Kdv equations with variable coefficients. The well-known KdV equation is a model for waves propagating on the surface of shallow water of constant depth. This model is considered as fitting into waves reaching the shore. Renewed attempts have led to the derivation of KdV type equations in which the coefficients are not constants. Johnson's equation is one such equation. The researcher has used this model to study the interaction of waves. It has been found that three-wave interaction is possible, there is transfer of energy between the waves and the energy is not conserved during interaction. |
Description: | Department of mathematics, Cochin University of Science And Technology |
URI: | http://dyuthi.cusat.ac.in/purl/3348 |
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Dyuthi-T1306.pdf | (3.402Mb) |
Abstract: | Preparation of an appropriate optical-fiber preform is vital for the fabrication of graded-index polymer optical fibers (GIPOF), which are considered to be a good choice for providing inexpensive high bandwidth data links, for local area networks and telecommunication applications. Recent development of the interfacial gel polymerization technique has caused a dramatic reduction in the total attenuation in GIPOF, and this is one of the potential methods to prepare fiber preforms for the fabrication of dye-doped polymer-fiber amplifiers. In this paper, the preparation of a dye-doped graded-index poly(methyl methacrylate) (PMMA) rod by the interfacial gel polymerization method using a PMMA tube is reported. An organic compound of high-refractive index, viz., diphenyl phthalate (DPP), was used to obtain a graded-index distribution, and Rhodamine B (Rh B), was used to dope the PMMA rod. The refractive index profile of the rod was measured using an interferometric technique and the index exponent was estimated. The single pass gain of the rod was measured at a pump wavelength of 532 nm. The extent of doping of the Rh B in the preform was studied by axially exciting a thin slice of the rod with white light and measuring the spatial variation of the fluorescence intensity across the sample. |
URI: | http://dyuthi.cusat.ac.in/purl/2582 |
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Dyuthi-P0142.pdf | (695.6Kb) |
Abstract: | Variations in the decay times of the characteristic green emissions at 522.7, 551.3, 549.6, 547.6, 542.2, 540.2, 535.9 and 533.5nm from CaF2 :H03+ with concentration are studied at RT and LNT. A pulsed N2 laser beam of power density 1.5 MW cm-2 is used for the excitation. Temperature dependent concentration quenching of the decay times are observed for all the emission bands. But an increase in the decay time due to the reabsorption process is also observed for a few of the above bands. |
URI: | http://dyuthi.cusat.ac.in/purl/2644 |
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Dyuthi-P0331.pdf | (365.5Kb) |
Abstract: | Experimental method for measuring photoacoustic(PA) signals generated by a pulsed laser beam in liquids is described. The pulsed PA technique is found to be a convenient and accurate method for determination of quantum yield in fluorescent dye solutions. Concentration dependence of quantum yield of rhodamine 6G in water is studied using the above method. The results indicate that the quantum yield decreases with increase in concentration in the quenching region in agreement with the existing reports based on radiometric measurements. |
URI: | http://dyuthi.cusat.ac.in/purl/2499 |
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Dyuthi-P0290.pdf | (511.1Kb) |
Abstract: | A method of preparation of strontium sulphide phosphors doped with europium is given. Nitrogen laser excited fluorescence emission spectra of these phosphors in the visible region are recorded. A band with line structure in the region 350-430 nm and a new broad band at 460 nm are observed. The splitting pattern for the 6p levels of Eu 2+ are given. |
URI: | http://dyuthi.cusat.ac.in/purl/2591 |
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Dyuthi-P0151.pdf | (253.2Kb) |
Abstract: | Development of molecular probes for the selective and sensitive detection of analytes has been an active area of research because such effective molecules can have biological and medicinal applications. Of the various probes reported, the fluorescence based systems have attracted much attention owing to their high sensitivity, fast response time, non–invasiveness and technical simplicity. However, the quantification of a target analyte using the fluorescent probe that acts through a single emission response (either increase or decrease in the fluorescence intensity) can have disadvantages, when compared to the systems that show either dual emission or ratiometric changes. In the case of the systems that exhibit ratiometric changes, the ratio of the fluorescence intensity of the two different wavelengths can be utilized for the quantification of the analyte of interest. Such an observation will have an effective internal referencing that greatly increases the sensitivity of the detection. In this context, it was our objective to develop functional organic systems and to explore their potential as sensitive fluorescent probes for the recognition of anions, cations and biomolecules. The present thesis has been divided into four chapters and of which the first chapter gives an overview on the organic fluorescent probes, with a particular emphasis on their mechanism of molecular recognition. In addition, the specific objectives of the present thesis were also briefly described at the end of this chapter. |
URI: | http://dyuthi.cusat.ac.in/purl/5150 |
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Dyuthi-T2184.pdf | (10.85Mb) |
Abstract: | Multimodal imaging agents that combine magnetic and fluorescent imaging capabilities are desirable for the high spatial and temporal resolution. In the present work, we report the synthesis of multifunctional fluorescent ferrofluids using iron oxide as the magnetic core and rhodamine B as fluorochrome shell. The core–shell structure was designed in such a way that fluorescence quenching due to the inner magnetic core was minimized by an intermediate layer of silica. The intermediate passive layer of silica was realized by a novel method which involves the esterification reaction between the epoxy group of prehydrolysed 3-Glyidoxypropyltrimethoxysilane and the surfactant over iron oxide. The as-synthesized ferrofluids have a high saturation magnetization in the range of 62–65 emu/g and were found to emit light of wavelength 640 nm ( excitation = 446 nm). Time resolved life time decay analysis showed a bi-exponential decay pattern with an increase in the decay life time in the presence of intermediate silica layer. Cytotoxicity studies confirmed the cell viability of these materials. The in vitro MRI imaging illustrated a high contrast when these multimodal nano probes were employed and the R2 relaxivity of these ∗Author to whom correspondence should be addressed. Email: smissmis@gmail.com sample was found to be 334 mM−1s−1 which reveals its high potential as a T2 contrast enhancing agent |
Description: | Material Express, Vol. 2, No. 4, 2012 |
URI: | http://dyuthi.cusat.ac.in/purl/4400 |
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Fluorescent Sup ... imodalCellular Imaging.pdf | (7.439Mb) |
Abstract: | The paper presents a maximally flat compact planar filter employing folded Stepped Impedance Resonators (SIR) and Complementary Split Ring Resonators (CSRR), for Ultra Wide Band (UWB) applications. An interdigital quarter wavelength coupled line is used for achieving the band pass characteristics. The filter has low insertion loss in its pass band and steep roll off rate and good attenuation in its lower and upper stop bands. The measured microwave characteristics of the fabricated filter show good agreement with the simulated response |
Description: | Electronic System Design (ISED), 2013 International Symposium on |
URI: | http://dyuthi.cusat.ac.in/purl/4341 |
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Folded SIR with ... Wide Band Applications.pdf | (385.5Kb) |
Abstract: | In the present investigation, an attempt is made to study late Quaternary foraminiferal and pteropod records of the shelf of northern Kerala and to evaluate their potentiality in paleocenographic and paleoclimatic reconstruction. The study gives details of sediment cores, general characteristics of foraminifera and pteropod species recorded from the examined samples and their systematic classification, spatial distribution of Recent foraminifera and pteropods and their response to varying bathymetry, nature of substrate, organic matter content in sediment and hydrography across the shelf. An attempt is also made to establish an integrated chronostratigraphy for the examined core sections. An effort is also made to identify microfaunal criteria useful in biostratigraphic division in shallow marine core sections. An attempt is made to infer various factors responsible for the change in microfaunal assemblage. Reconstruction of sea level changes during the last 36,000 years was attempted based on the pteropod record. The study reveals a bathymetric control on benthic/planktic (BF/PF) foraminiferal and pteropods/planktic foraminiferal (Pt/PF) abundance ratio. Bathymetric distribution pattern of BF/PF ratio is opposite to the (Pt/PF) ratio with decreasing trend of former from the shore across the shelf. Quantitative benthic foraminiferal record in the surficial sediments reveals a positive correlation between the diversity and bathymetry. R-mode cluster analysis performed on 30n significant Recent benthic foraminiferal, determines three major assemblage. |
URI: | http://dyuthi.cusat.ac.in/purl/74 |
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Dyuthi-T0552.pdf | (7.582Mb) |
Abstract: | Professor Irma Glicman Adelman, an Irish Economist working in California University at Berkely, in her research work on ‘Development Over Two Centuries’, which is published in the Journal of Evolutionary Economics, 1995, has identified that India, along with China, would be one of the largest economies in this 21st Century. She has stated that the period 1700 - 1820 is the period of Netherlands, the period 1820 - 1890 is the period of England the period 1890 - 2000 is the period of America and this 21st Century is the century of China and India. World Bank has also identified India as one of the leading players of this century after China. India will be third largest economy after USA and China. India will challenge the Global Economic Order in the next 15 years. India will overtake Italian economy in 2015, England economy in 2020, Japan economy in 2025 and USA economy in 2050 (China will overtake Japan economy in 2016 and USA economy in 2027). India has the following advantages compared with other economies. India is 4th largest GDP in the world in terms of Purchasing Power. India is third fastest growing economy in the world after China and Vietnam. Service sector contributes around 57% of GDP. The share of agriculture is around 17% and Manufacture is 16% in 2005 - 2006. This is a character of a developed country. Expected GDP growth rate is 10% shortly (It has come down from 9.2% in 2006 - 2007 to 6.2% during 2008 - 2009 due to recession. It is only a temporary phenomenon). India has $284 billion as Foreign Exchange Reserve as on today. India had just $1 billion as Foreign Exchange Reserve when it opened its economy in the year 1991. In this research paper an attempt has been made to study the two booming economies of the globe with respect to their foreign exchange reserves. This study mainly based on secondary data published by respective governments and various studies done on this area |
Description: | African Journal of Marketing Management Vol. 2(4) pp. 69-79, April 2010 |
URI: | http://dyuthi.cusat.ac.in/purl/4298 |
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Foreign exchange reserves in India and China.pdf | (265.1Kb) |
URI: | http://dyuthi.cusat.ac.in/purl/5336 |
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Dyuthi T-2403.pdf | (12.35Mb) |
URI: | http://dyuthi.cusat.ac.in/purl/5323 |
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Dyuthi T-2359.pdf | (9.406Mb) |
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