832 resultados para Impact of compositional constraints-on correlation and covariance
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Cette thèse vise à mieux comprendre les tensions ethniques. Ceci est fait en explorant, dans une étude en quatre parties, l'une de ses caractéristiques les plus importantes mais sévèrement négligées: la langue. S’inspirant des traditions de recherche de la sociolinguistique, de la psychologie sociale et de la science politique, cette thèse fournit une analyse en profondeur de l'influence de la langue sur les relations intergroupes. Elle le fait, spécifiquement, en se concentrant sur l'influence que la vitalité linguistique, la santé sociale d'une langue, a sur les tensions sociales. Cette thèse propose un cadre théorique dans lequel le niveau de vitalité linguistique contribue à générer des griefs culturels qui ont une incidence par la suite sur les relations intergroupes. Le premier article explore la relation macro entre la vitalité linguistique et l'intensité des conflits intergroupes. Les résultats, dérivés de données de l'Atlas UNESCO des langues en danger dans le monde et du projet Minorities at Risk (MAR), démontrent une relation curvilinéaire où les niveaux bas et élevé de vitalité linguistique génèrent une intensité inférieure au niveau modéré de vitalité. Ces résultats confirment que la vitalité linguistique est un déterminant important des tensions ethniques fondées sur la langue d'une manière générale, mais encore davantage pour les pays ayant plusieurs minorités linguistiques. Le deuxième article explore l'influence de la vitalité linguistique sur la confiance politique. Il utilise des données de l'Atlas UNESCO des langues en danger dans le monde ainsi que des données du European Social Survey (ESS). Les résultats soutiennent un modèle de médiation dans lequel la vitalité linguistique influence positivement la confiance politique d'une manière directe ainsi qu’indirectement par le biais de la discrimination perçue. Le troisième article cherche à isoler la séquence socio-psychologique qui relie la vitalité linguistique aux tensions intergroupes. Des données de sondage originales ont été recueillies auprès de francophones du Québec, de l'Ontario, du Nouveau-Brunswick et du Manitoba. Les résultats d’analyses de régression multiple soutiennent une séquence socio-psychologique dans laquelle la menace endogroupe influence les attitudes envers l’exogroupe par le biais de la menace perçue comme étant causée par l’exogroupe. Ainsi, ces constats soulignent l'importance des perceptions de la vitalité linguistique pour les attitudes intergroupes. Le quatrième article, produit en collaboration avec Patrick Fournier et Veronica Benet-Martinez, utilise un protocole expérimental pour déterminer le rôle causal de la vitalité linguistique sur les attitudes intergroupes. Les résultats démontrent que le type d'information, positif ou négatif, au sujet de la vitalité linguistique influence les perceptions de menace envers une langue. Cependant, les résultats quant à l'impact de l’information à propos de la vitalité linguistique sur les attitudes envers l’exogroupe, l’appui à la souveraineté et l'identité subjective sont moins évidents. Cette thèse permet de mieux comprendre les tensions intergroupes en démontrant le rôle important que joue la vitalité linguistique sur des phénomènes macros ainsi que sur les attitudes des individus.
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This study is an attempt to look at the impact of international norms on the criminal justice administration in India. It has been confined to the criminal justice administration since it is here that the concept of sovereignty is affected the most. The study is intended to give a fair idea as to the position India holds in the matter of implementation of international norms in the area of criminal justice administration and the areas that require urgent attention. The study suggests that the country’s system is on the right track towards the implementation of the international norms. The position of law in India and the requirements under international norms with respect to criminal justice administration have been studied by considering the same at three stages – pre trial, trial and post trial stages. The question as to whether they comply with the international standards and the approaches of the court has been inquired into this study
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The present study was an attempt to analyze systematically the techniques of monetary control measures with its relevance and changing importance and to find out their effectiveness in the Indian context especially to achieve the thriving objectives of price stability and economic growth.There is definite and remarkable economic impact of monetary policy on Indian economy in the post-reform period. The importance of monetary policy has been increasing year after year. Its role is very relevant in attaining monetary objectives, especially in managing price stability and achieving economic growth. Along that, the use and importance of monetary weapons like Bank rate, CRR, SLR, Repo rate and Reverse Rate have increased over the years. Repo and Reverse Repo rates are the most frequently used monetary techniques in recent years. The rates are varied mainly for curtailing inflation and absorb the excess liquidity and hence to maintain price stability in the economy. Thus, this short-time objective of price stability is more successful on Indian economy rather than other long-term objectives of development.Monetary policy rules can be active or passive. The passive rule is to keep the money supply constant, which is reminiscent of Milton Friedman’s money growth rule. The second, called a price stabilization rule, is to change the money supply in response to changes in aggregate supply or demand to keep the price level constant. The idea of an active rule is to keep the price level and hence inflation in check. In India, this rule dominates our monetary policy. A stable growth is healthy growth.
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Vast changes have taken place in the field of institutional rural credit in India since the nationalisation of nineteen commercial banks in 1969. The supply of institutional finance to cultivators amounted to 63.2 percent of the total credit in 1981 compared to 31.2 percent in 1971. Insti tutionalisation of agricultural credit envisaged two objectives in general. One was to emancipate cultivators and farmers from the clutches of indigenous financiers and money lenders. The second was to make farmers financially capable of adopting the new technology or improved practices in agriculture so as to increase their agricultural production and thereby contributing to the development of agriculture in India. Though vast literature on Institutional Credi t and agriculture is available, no indepth and serious work examining thoroughly the cause of credit diversion has been undertaken so far. The present study is an attempt to fill up this gap. The study will be helpful to lending insti tutions, viz. Co-ope:r-atives, Commercial banks and various other insti tutional agencies in connection with their lending activity_ Also, the study will help government in .formulating proper policies that will insure a preferential treatment in favour of the most needy category of farmers and cultivators with respect to agricultural credit disbursement
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Perhaps the most characteristic feature of our timesis that economic development has become the goal and ambition of people. The needs which this desire creates are immense they are of course urgent everywhere and they cannot be postponded. Consequently there was a frantic search for formulae of rapid economic development. It was claimed that agrarian reform is the indispensable condition for the development of productive forces and industrialization of the state.A key element in the land reform policy is the provision for ownership of land .Measures taken include redistribution of large estates ,assistance to tenants or labourers to acquire holdings and settlement schemes to establish new farming units on reclaimed or developed lands.In this thesis an attempt is made to evaluate the impact of these reforms on the agrarian structure in general and the scheduled caste in particular.
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Wireless sensor networks monitor their surrounding environment for the occurrence of some anticipated phenomenon. Most of the research related to sensor networks considers the static deployment of sensor nodes. Mobility of sensor node can be considered as an extra dimension of complexity, which poses interesting and challenging problems. Node mobility is a very important aspect in the design of effective routing algorithm for mobile wireless networks. In this work we intent to present the impact of different mobility models on the performance of the wireless sensor networks. Routing characteristics of various routing protocols for ad-hoc network were studied considering different mobility models. Performance metrics such as end-to-end delay, throughput and routing load were considered and their variations in the case of mobility models like Freeway, RPGM were studied. This work will be useful to figure out the characteristics of routing protocols depending on the mobility patterns of sensors
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A chitinolytic fungus, Beau6eria bassiana was isolated from marine sediment and significant process parameters influencing chitinase production in solid state fermentation using wheat bran were optimised. The organism was strongly alkalophilic and produced maximum chitinase at pH 9·20. The NaCl and colloidal chitin requirements varied with the type of moistening medium used. Vegetative (mycelial) inoculum was more suitable than conidial inoculum for obtaining maximal enzyme yield. The addition of phosphate and yeast extract resulted in enhancement of chitinase yield. After optimisation, the maximum enzyme yield was 246·6 units g 1 initial dry substrate (U gIDS 1). This is the first report of the production of chitinase from a marine fungus.
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Process parameters influencing e-glutaminase production by marine Vibrio costicola in solid state fermentation (SSF) using polystyrene as an inert support were optimised. Maximal enzyme yield (157 U/g dry substrate) was obtained at 2% (w/w) t:glutamine, 35°C and pH 7.0 after 24 h. Maltose and potassium dihydrogen phosphate at 1% (w/w) concentration enhanced enzyme yield by 23 and 18%, respectively, while nitrogen sources had an inhibitory effect. Leachate with high specific activity for glutaminase (4.2 U/mg protein) and low viscosity (0-966 Ns/m 2) was recovered from the polystyrene SSF system
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This study provides an overview of fish and fishery products exports from India as a whole before focusing on the fish and fishery products sector in Kerala. The food safety and other technical requirements facing Indian exporters of fish and fishery products are then reviewed. The remainder of the study explores experiences with food safety controls, in particular across Kerala’s major export markets, examining the efforts made by the Indian government and the impact on the processing sector as a whole and the preprocessing sector in particular. Finally, the remaining challenges faced by the fish and fishery products sector in Kerala as well as India as a whole are assessed in the context of the manner in which both the government and exporters have responded to changes in food safety and other requirements in major export markets
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The Upper Blue Nile River Basin (UBNRB) located in the western part of Ethiopia, between 7° 45’ and 12° 45’N and 34° 05’ and 39° 45’E has a total area of 174962 km2 . More than 80% of the population in the basin is engaged in agricultural activities. Because of the particularly dry climate in the basin, likewise to most other regions of Ethiopia, the agricultural productivity depends to a very large extent on the occurrence of the seasonal rains. This situation makes agriculture highly vulnerable to the impact of potential climate hazards which are about to inflict Africa as a whole and Ethiopia in particular. To analyze these possible impacts of future climate change on the water resources in the UBNRB, in the first part of the thesis climate projection for precipitation, minimum and maximum temperatures in the basin, using downscaled predictors from three GCMs (ECHAM5, GFDL21 and CSIRO-MK3) under SRES scenarios A1B and A2 have been carried out. The two statistical downscaling models used are SDSM and LARS-WG, whereby SDSM is used to downscale ECHAM5-predictors alone and LARS-WG is applied in both mono-model mode with predictors from ECHAM5 and in multi-model mode with combined predictors from ECHAM5, GFDL21 and CSIRO-MK3. For the calibration/validation of the downscaled models, observed as well as NCEP climate data in the 1970 - 2000 reference period is used. The future projections are made for two time periods; 2046-2065 (2050s) and 2081-2100 (2090s). For the 2050s future time period the downscaled climate predictions indicate rise of 0.6°C to 2.7°C for the seasonal maximum temperatures Tmax, and of 0.5°C to 2.44°C for the minimum temperatures Tmin. Similarly, during the 2090s the seasonal Tmax increases by 0.9°C to 4.63°C and Tmin by 1°C to 4.6°C, whereby these increases are generally higher for the A2 than for the A1B scenario. For most sub-basins of the UBNRB, the predicted changes of Tmin are larger than those of Tmax. Meanwhile, for the precipitation, both downscaling tools predict large changes which, depending on the GCM employed, are such that the spring and summer seasons will be experiencing decreases between -36% to 1% and the autumn and winter seasons an increase of -8% to 126% for the two future time periods, regardless of the SRES scenario used. In the second part of the thesis the semi-distributed, physically based hydrologic model, SWAT (Soil Water Assessment Tool), is used to evaluate the impacts of the above-predicted future climate change on the hydrology and water resources of the UBNRB. Hereby the downscaled future predictors are used as input in the SWAT model to predict streamflow of the Upper Blue Nile as well as other relevant water resources parameter in the basin. Calibration and validation of the streamflow model is done again on 1970-2000 measured discharge at the outlet gage station Eldiem, whereby the most sensitive out the numerous “tuneable” calibration parameters in SWAT have been selected by means of a sophisticated sensitivity analysis. Consequently, a good calibration/validation model performance with a high NSE-coefficient of 0.89 is obtained. The results of the future simulations of streamflow in the basin, using both SDSM- and LARS-WG downscaled output in SWAT reveal a decline of -10% to -61% of the future Blue Nile streamflow, And, expectedly, these obviously adverse effects on the future UBNRB-water availibiliy are more exacerbated for the 2090’s than for the 2050’s, regardless of the SRES.
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Vegetables represent a main source of micro-nutrients which can improve the health status of malnourished poor in the world. Spinach (Spinacia oleracea L.) is a popular leafy vegetable in many countries which is rich with several important micro-nutrients. Thus, consuming Spinach helps to overcome micro-nutrient deficiencies. Pests and pathogens act as major yield constraints in food production. Root-knot nematodes, Meloidogyne species, constitute a large group of highly destructive plant pests. Spinach is found to be highly susceptible for these nematode attacks. Though agricultural production has largely benefited from modern technologies and innovations, some important dimensions which can minimize the yield losses have been neglected by most of the growers. Pre-plant or initial nematode density in soil is a crucial biotic factor which is directly responsible for crop losses. Hence, information on preplant nematode densities and the corresponding damage is of vital importance to develop successful control procedures to enhance crop production. In the present study, effect of seven initial densities of M. incognita, i.e., 156, 312, 625, 1250, 2,500, 5,000 and 10,000 infective juveniles (IJs)/plant (equivalent to 1000cm3 soil) on the growth and root infestation on potted spinach plants was determined in a screen house. In order to ensure a high accuracy, root infestation was ascertained by the number of galls formed, the percentage galled-length of feeder roots and galled-feeder roots, and egg production, per plant. Fifty days post-inoculation, shoot length and weight, and root length were suppressed at the lowest IJs density. However, the pathogenic effect was pronounced at the highest density at which 43%, 46% and 45% reduction in shoot length and weight, and root length, respectively, was recorded. The highest reduction in root weight (26%) was detected at the second highest density. The Number of galls and percentage galled-length of feeder roots/per plant showed significant progressive increase across the increasing IJs density with the highest mean value of 432.3 and 54%, respectively. The two shoot growth parameters and root length showed significant inverse relationship with the increasing gall formation. Moreover, the shoot and root length were shown to be mutually dependent on each other. Suppression of shoot growth of spinach greatly affects the grower’s economy. Hence, control measures are essentially needed to ensure a better production of spinach via reducing the pre-plant density below the level of 0.156 IJs/cm3.
The impact of deformation strain on the formation of banded clouds in idealized modeling experiments
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Experiments are performed using an idealized version of an operational forecast model to determine the impact on banded frontal clouds of the strength of deformational forcing, low-level baroclinicity, and model representation of convection. Line convection is initiated along the front, and slantwise bands extend from the top of the line-convection elements into the cold air. This banding is attributed primarily to M adjustment. The cross-frontal spreading of the cold pool generated by the line convection leads to further triggering of upright convection in the cold air that feeds into these slantwise bands. Secondary low-level bands form later in the simulations; these are attributed to the release of conditional symmetric instability. Enhanced deformation strain leads to earlier onset of convection and more coherent line convection. A stronger cold pool is generated, but its speed is reduced relative to that seen in experiments with weaker deformational strain, because of inhibition by the strain field. Enhanced low-level baroclinicity leads to the generation of more inertial instability by line convection (for a given capping height of convection), and consequently greater strength of the slantwise circulations formed by M adjustment. These conclusions are based on experiments without a convective-parametrization scheme. Experiments using the standard or a modified scheme for this model demonstrate known problems with the use of this scheme at the awkward 4 km grid length used in these simulations. Copyright © 2008 Royal Meteorological Society
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