Philip, Thomas; Dr.Meera Bai,M(Cochin University of Science and Technology, May , 1996)
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Abstract:
The following objectives have been formulated for
the study.
To assess the procurement and marketing practices of
Non—Timber Forest Produce by tribes and Tribal
Co-operative Societies and examine the role of
co—operatives in liberating the tribes from the clutches
of private traders.
To study the relative efficiency of marketing channels.
To analyse the inter—difference between tribes and
regions in the collection and marketing of Non—Timber
Forest produce.
To examine the forward linkage of tribal co-operative
societies with the Ayurvedic Medicinal Manufacturing
Units of the state.
To examine the impact of marketing on employment and
income of tribes and
To examine the extent of involvement of tribes in Tribal
Co-operative Societies in policy formulation and
implementation.
Description:
Department of Applied Economics.
Cochin University of Science and Technology
Chitra, R Nayak; Kuriakose, V C(Elsevier, June 4, 2007)
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Abstract:
We investigate the effect of the phase difference of appliedfields on the dynamics of mutually coupledJosephsonjunctions. A phase difference between the appliedfields desynchronizes the system. It is found that though the amplitudes of the output voltage values are uncorrelated, a phase correlation is found to exist for small values of applied phase difference. The dynamics of the system is found to change from chaotic to periodic for certain values of phase difference. We report that by keeping the value of phase difference as π, the system continues to be in periodic motion for a wide range of values of system parameters. This result may find applications in devices like voltage standards, detectors, SQUIDS, etc., where chaos is least desired.
Haseena, V A; Dr.Meera Bai,M(Cochin University of Science and Technology, September 9, 2006)
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Abstract:
This thesis Entitled Dynamics of deforestation and Socio-Economic profile of tribal women flok in kerala -A study of Attappady. The study was based on both primary and secondary data. Primary data
were collected through a sample survey conducted in three panchayaths .The thesis is organized in eight chapters. The first chapter provides the background to the study. Second chapter reviews the literature. Third chapter provides the profile of the study area and general conditions. Fourth chapter
consists of the life cycle structure of the tribal woman. Fifth chapter covers the socio-economic conditions of the tribal women in the study area. Sixth chapter consists of relationship between tribal women and forest and the degradation of the forest. Seventh chapter provides the documentation of the development programmes implemented in Attappady and their importance to the tribals. Last chapter consists of summary and conclusions of the study, suggestions and recommendations of the study.
Description:
Department of Applied Economics, Cochin University of Science and Technology
Jayaraj,K A; Saramma,U Pananpunnayil(National institute of oceanography, 2006)
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Abstract:
In this study dynamics of infaunal benthic community of the continental shelf of north-eastern Arabian sea. The benthic (under water sea) organisms play an important role in the marine food chain. It can be concluded that seasonal differences in the benthic community was observed in lower depths and absent in deeper depths. Increased richness and diversity during pre-monsoon may be related to the increased primary production which inturn influenced by the increased nutrient input due to winter convection. No single ecological factor could be considered as a master factor. In general the area supports moderately high benthic production and diversified community.
Sanathanan,Velluva; Muraleedharan,P K; Mary,Joseph(Kerala Forest Research Institute& Department of Applied Economics, 1999)
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Abstract:
The present study on the dynamics of land use in recently settled forest areas. In the course of events, tribals lost their land; the demographic structure of Attappady changed; the cropping pattern got diversified; traditional techniques of production were ruined; new crops and new techniques of cultivation came to stay; and the entire cost and return structure of production underwent radical change. Migration to Attappady is essentially a continuation of the Malabar migration process from Travancore, through, some people from Tamil Nadu also had migrated to this region earlier. The demographic structure, along with land structure, has changed in favour of the settlers within a short span of time. Lack of security of ownership has acted as a strong reason for wanton exploitation of land resources. The major influencing factors on crop choices among settlers were labour endowment, date of settlement and education. Attappady is an unique ecosystem in Kerala characterized by many interdependables. The latest hand of environmental degradation is a grave danger especially on sloppy terrains,which are under cultivation of tapioca and dry annual crops like groundnuts, cotton, grams etc. Soil erosion as a result of the unplanned cultivation of these crops has resulted in dramatic decline in soil fertility and hence low crop productivity. This calls for a watershed management approach for the sustainable development of the region. A progressive agrarian transformation is warranted to maintain the homegarden as a sustainable production system in ecological and socio-economic terms.
Riju, C Issac; Vasudevan Pillai, K; Harilal, S S; Geetha K, Varier; Bindhu, C V; Pramod, Gopinath; Radhakrishnan, P; Nampoori, V P N; Vallabhan, C P G(Elsevier Science, 1998)
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Abstract:
Laser produced plasma from silver is generated using a Q-switched Nd:YAG laser. Optical emission spectroscopy is used
to carry out time of flight (TOF) analysis of atomic particles. An anomalous double peak profile in the TOF distribution is
observed at low pressure. A collection of slower species emerge at reduced pressure below 4 X lO-3 mbar and this species
has a greater velocity spread. At high pressure the plasma expansion follows the shockwave model with cylindrical
symmetry whereas at reduced pressure it shows unsteady adiabatic expansion (UAE). During UAE the species show a
parabolic increases in the expansion time with radial distance whereas during shock wave expansion the exponent is less
than one. The angular distribution of the ablated species in the plume is obtained from the measurement of optical density of
thin films deposited on to glass substrates kept perpendicular to the plume. There is a sharp variation in the film thickness
away from the film centre due to asymmetries in the plume.
Babu, V; Dr.Muraleedharan Nair, S(Cochin University Of Science And Technology, June , 2001)
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Abstract:
The tremendous growth in industrial production and the consequent
improving in the standards of living have provoked worldwide discussion on
environmental quality. The question of abusive use of pesticides for crop protection
and vector control programmes is only one aspect of this entire complex. Inspite of
this, tendentious publications such as Rachel Carson’s Silent spring have brought
crop protection into the foreground of environmental discussions. The persistence
and high stability of organochlorine pesticides are regarded as problematic and the
accumulation of pesticides residues and its metabolites in the different
compartments of the environment is one of the major concerns. Because of their
persistence in the aquatic environment and biomagnifications in food chain, the
continuous use of pesticides will have wider implications not only in aquatic
environmental quality but also on human health. The residual levels of these
persistent chemicals exceed their permissible limits, and get partitioned among the
constituent phases of the aquatic systems. Crop protection is only part of the
agricultural economy and in agriculture itself has led to the most fundamental
changes in the human environment. So, in all areas of life one must weigh the
desired advantages against possible disadvantages.
The proposed thesis is based on the investigations on the distributions of
organochlorine and organophosphorus pesticides in the waters and sediments of
Kuttanad backwaters. Kuttanad, a unique agricultural area, which forms the
southern part of the Vembanad lake, is a deltaic formation of four river systems
entering the southern part of the Cochin estuary. No systematic study has ever been
done to assess the ecotoxicological impact of these diverse chemicals and their
metabolites in Kuttanad area. So, a detailed systematic and rigorous investigation
on the distributions of these persistent chemicals is carried out.
The thesis is divided into 7 Chapters
Description:
Department of Chemical
Oceanography, School of Marine Sciences, Cochin University of Science and
Technology
Sujatha, C H; Dr.Jacob, Chacko(Cochin University of Science and Technology, July , 1992)
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Abstract:
Industrial pollutants, consisting of heavy metals, petroleum residues, petrochemicals, and a wide spectrum of pesticides, enter the marine environment on a massive scale and pose a very serious threat to all forms of aquatic life. Although, earlier, efforts were directed towards the identification of pollutants and their major sources, because of a growing apprehension about the potential harm that pesticides can inflict upon various aquatic fauna and flora, research on fundamental and applied aspects of pesticides in the aquatic environment has mushroomed to a point where it has become difficult to even keep track of the current advances and developments. The Cochin Estuarine System (CES), adjoining the Greater Cochin area, receives considerable amounts of domestic sewage, urban wastes, agricultural runoff as well as effluent from the
industrial units spread all along its shores. Since preliminary investigations revealed that the most prominent of organic pollutants discharged to these estuarine waters were the pesticides, the present study was designed to analyse the temporal and spatial distribution profile of some of the more toxic, persistent pesticides ——— organochlorines such as DDT and their metabolites; HCH-isomers; a cyclodiene compound," Endosulfan and a widely distributed, easily degradable,
organophosphorus compound, Malathion, besides investigating their sorptional and toxicological characteristics.
Although, there were indications of widespread contamination of various regions of the CBS with DDT, HCH-isomers etc., due to inadequacies of the monitoring programmes and due to a glaring void of baseline data the causative factors could not identified authentically. Therefore, seasonal and spatial distributions of some of the more commonly used pesticides in the CES were monitored systematically, (employing Gas Chromatographic techniques) and the results are analysed.
Description:
Chemical
Oceanography Division, School of Marine Sciences, Cochin University
of Science and Technology
Saratchandran, P P; Nandakumaran, V M; Ambika, G(Springer, November , 1996)
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Abstract:
By introducing a periodic perturbation in the control parameter of the logistic map we have investigated the period locking properties of the map. The map then gets locked onto the periodicity of the perturbation for a wide range of values of the parameter and hence can lead to a control of the chaotic regime. This parametrically perturbed map exhibits many other interesting features like the presence of bubble structures, repeated reappearance of periodic cycles beyond the chaotic regime, dependence of the escape parameter on the seed value and also on the initial phase of the perturbation etc.
Thomas, Kuruvilla; Nandakumaran, V M(Indian Academy of Sciences, March , 2000)
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Abstract:
The effect of coupling two chaotic Nd:YAG lasers with intracavity KTP crystal for frequency doubling is numerically studied for the case of the laser operating in three longitudinal modes. It is seen that the system goes from chaotic to periodic and then to steady state as the coupling constant is increased. The intensity time series and phase diagrams are drawn and the Lyapunov characteristic exponent is calculated to characterize the chaotic and periodic regions.
Prathapachandra Kurup, M R; Nisha, K; Sithambaresan, M(November 21, 2011)
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Abstract:
The title compound, C21H19N3O2S, exists in the thione form.
The configuration about the C N bond is E. The
hydrazinecarbothioamide unit adopts an almost planar
arrangement, with maximum deviations of 0.016 (3) and
0.016 (2) A ° for the two thiourea N atoms. An intramolecular
O—H N hydrogen bond occurs. Weak intermolecular N—
H S, C—H O and C—H interactions are observed in
the crystal structure
Adaptive filter is a primary method to filter
Electrocardiogram (ECG), because it does not need the signal
statistical characteristics. In this paper, an adaptive filtering
technique for denoising the ECG based on Genetic Algorithm
(GA) tuned Sign-Data Least Mean Square (SD-LMS) algorithm
is proposed. This technique minimizes the mean-squared error
between the primary input, which is a noisy ECG, and a
reference input which can be either noise that is correlated in
some way with the noise in the primary input or a signal that is
correlated only with ECG in the primary input. Noise is used as
the reference signal in this work. The algorithm was applied to
the records from the MIT -BIH Arrhythmia database for
removing the baseline wander and 60Hz power line interference.
The proposed algorithm gave an average signal to noise ratio
improvement of 10.75 dB for baseline wander and 24.26 dB for
power line interference which is better than the previous
reported works
Description:
2012 IEEE International Conference on Advanced Communication Control and Computing Technologies (ICACCCT)
Verghese, C P; Dr.Shahul,Hameed M(Cochin University of Science and Technology, May , 1994)
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Abstract:
The present scenario of industrial fishing in India is that most of large trawlers are based at Visakhapatnam and congregate in the potential shrimp ground in the
upper East coast of India commonly known as the Sandheads. These are outriggcr vessels operating two or four trawl nets along with a testing trawl called try
net. In the early Seventies these vessels were operating on a very high economic return which was evident from the steady increase in number of outriggers over a period of twenty years. Since the total allowable catch has to be
shared by all vessels including the increasing fleet, reduction per vessel output is bound to happen. Therefore some of them could not survive the competition
and withdrew from the scene. The number of outriggers did not increase subsequently. However, there arose a doubt whether the existing fleet of about 180 vessels are fishing economically or whether there is any scope for further introduction of industrial vessels in the region. This study is focussing to the techno economic aspects of industrial fishing in the upper East coast of India
Description:
Department of Industrial Fisheries,
Cochin University of Science and Technology,
Jyothibabu, R; Dr. Nair, K K C(National Institute of Oceanography, July , 2004)
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Abstract:
In the present study an attempt has been made to understand the microzooplankton community along the easr coast of India. Most of the earlier studies projected Bay of Bengal as an oligotrophic system where phytoplankton growth is limited by a number of factors among which nutrients are the foremost. Hence it is logical to consider that the most of the primary production in the Bay of Bengal could be contributed by small sized phytoplankton harnessing the available resources, which in turn can be utilized effiency by the microzooplankton only. Hence microzooplankton could play in transferring primary organic carbon to higher tropic levels in this region.