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Search Results: 1 - 10 of 334 matches for " Bidisha Lahiri "
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The Effect of Environmental Taxes on Steady-State Consumption  [PDF]
Bidisha Lahiri
Theoretical Economics Letters (TEL) , 2014, DOI: 10.4236/tel.2014.49110
Abstract: This paper examines the effects of environmental taxes on the demand and supply sides of the economy and uncovers two opposite forces on long-term production. An increase in the environmental tax stimulates abatement behavior as producers lower production from the same capital stock but simultaneously lower per-unit emissions increases consumers’ demand for the cleaner goods hence increasing the capital stock. Starting from a low level of environmental taxes, my model finds that initially the demand-driven positive relationship dominates while at a higher level of environmental taxes, the production lowering negative effect dominates; the transition occurs before the economy reaches the optimal tax rate.
Income Distribution and Terms-of-Trade under Generalized Returns to Scale and Capital Accumulation: Implications Using Classical Equilibrium Condition  [PDF]
William Darity, Bidisha Lahiri
Theoretical Economics Letters (TEL) , 2019, DOI: 10.4236/tel.2019.97160
Abstract: This paper examines the implications of generalized returns to scale on the long-period equilibrium in an economy with 2 goods and 2 inputs where one of the inputs is a produced means of production. The Classical definition of long-period equilibrium defined by profit rates being equalized across sectors is used for closure. The model is initially characterized for a closed economy and then extended to a flexible-wage-North and surplus-labor-South model of trade where the North produces only capital and the South produces the consumption good using Northern capital. Neither full employment in the North nor balanced-growth of the integrated economy emerges under non-constant returns to scale. We characterize income distribution between labor and capital and movements of terms-of-trade between North and South.
Molecular Mechanisms Underlying Activity-Dependent GABAergic Synapse Development and Plasticity and Its Implications for Neurodevelopmental Disorders
Bidisha Chattopadhyaya
Neural Plasticity , 2011, DOI: 10.1155/2011/734231
Abstract: GABAergic interneurons are critical for the normal function and development of neural circuits, and their dysfunction is implicated in a large number of neurodevelopmental disorders. Experience and activity-dependent mechanisms play an important role in GABAergic circuit development, also recent studies involve a number of molecular players involved in the process. Emphasizing the molecular mechanisms of GABAergic synapse formation, in particular basket cell perisomatic synapses, this paper draws attention to the links between critical period plasticity, GABAergic synapse maturation, and the consequences of its dysfunction on the development of the nervous system. 1. Introduction More than four decades of research has demonstrated that although the brain remains plastic throughout life, continuously reorganizing its connections in the face of new experiences, childhood represents a specific phase in the development of the synaptic network that is characterized by overall remarkable plasticity. During this period of enhanced plasticity also called “critical period”, experience can produce permanent, large-scale changes in neural circuits. Studies on mechanisms that underlie activation and regulation of critical periods in the central nervous system (CNS) are seminal in neuroscience, with the underlying motive being that manipulation of such mechanisms may potentially allow reactivation of neural circuit plasticity during times when the adult brain is less plastic, for example, to aid adaptive circuit rewiring following insult, such as stroke. Additionally, this line of inquiry may help us develop rational pharmacological approaches to correct alterations in the brain of children with neurodevelopmental disorders involving altered synapse formation and/or plasticity. Critical periods have been observed across sensory, motor, auditory, and also higher cognitive areas; however much of our knowledge of the cellular and molecular mechanisms of onset, maintenance, and termination of these periods derive from seminal studies by Wiesel and Hubel [1] in the developing cat visual system. Electrophysiological recordings from neurons in the primary visual cortex show activation to different degrees by visual stimuli presented to one eye or the other, a property termed ocular dominance. Closing one eye during a specific postnatal time period starts a cascade of events leading to synaptic reorganization of neural circuits in visual cortex, resulting in lifelong, irreversible reduction of the ability of the deprived eye to drive neuronal responses in the cortex, and a
Comparative Statics of Oligopoly Equilibrium in a Pure Exchange Economy  [PDF]
Somdeb Lahiri
Modern Economy (ME) , 2011, DOI: 10.4236/me.2011.22012
Abstract: In this paper we consider an oligopoly and we are concerned with the effect of entry in the market of buyers and/or sellers on the price of the good being sold and the pay-offs/utilities of the buyers and sellers. The major results obtained in this paper are the following: 1) Given the number of buyers both individual as well as aggregate offers go up as the number of sellers increases. Further, the price of Y decreases, each buyer is better off and each seller is worse off as the number of sellers increases. 2) Given the number of sellers, the price of Y increases, each buyer is worse off and each seller is better off as the number of buyers increases. 3) As the economy is replicated the equilibrium price decreases. The sequence of equilibrium prices thus obtained converges to the competitive equilibrium price of the original economy. 4) As the economy is replicated the buyers are better off. The sequence of consumption bundles of the buyers converges to the consumption bundle of the buyers at the competitive equilibrium of the original economy. 5) As the economy is replicated the sellers are worse off. The sequence of consumption bundles of the sellers converges to the consumption bundle of the sellers at the competitive equilibrium of the original economy.
Structural breaks in finance growth nexus: the study of Indonesia
Bidisha Mukhopadhyay,Rudra P. Pradhan
Journal of Economics and Behavioral Studies , 2011,
Abstract: This paper empirically investigates the finance-growth nexus for an annual data set of Indonesia during the last two decades. The purpose is to examine the causal relationship between financial development and economic growth in Indonesia and also to test the structural breaks in the finance-growth relationship to investigate the change in policy regimes. To examine the causal relationship between financial development and economic growth, the newly proposed ARDL bound testing approach by Pesaran et al. (1996) has been applied .The estimated results support the view of Lucas (1988) that finance doesn’t matter for economic growth. Structural break is identified in the year 1997 in Indonesia with the estimated finance-growth relationship. The stability of the estimated relationship is examined with break-point Chow tests (F tests).
Herpes Simplex Infection : Interesting Atypical Presentation Of Three Cases
Guhaneogi Bidisha,Chattopadhyay S P
Indian Journal of Dermatology , 2003,
GABAergic Circuit Dysfunctions in Neurodevelopmental Disorders
Bidisha Chattopadhyaya,Graziella Di Cristo
Frontiers in Psychiatry , 2012, DOI: 10.3389/fpsyt.2012.00051
Abstract: GABAergic interneurons control neuronal excitability, integration, and plasticity. Further, they regulate the generation of temporal synchrony and oscillatory behavior among networks of pyramidal neurons. Such oscillations within and across neural systems are believed to serve various complex functions, such as perception, movement initiation, and memory. Alterations in the development of GABAergic circuits have been implicated in various brain diseases with neurodevelopmental origin. Here, we highlight recent studies suggesting a role for alterations of GABA transmission in the pathophysiology of two neurodevelopmental diseases, schizophrenia, and autism. We further discuss how manipulations of GABA signaling may be used for novel therapeutic interventions.
Hydrochemical Characteristics of Groundwater for Domestic and Irrigation Purposes in Dwarakeswar Watershed Area, India  [PDF]
Sisir Kanti Nag, Anindita Lahiri
American Journal of Climate Change (AJCC) , 2012, DOI: 10.4236/ajcc.2012.14019

The Hydrochemical study was carried out in Dwarakeswar watershed area, Bankura and Purulia districts, West Bengal, India, with an objective of understanding the suitability of local groundwater quality for domestic and irrigation purposes. Groundwater samples have been collected from different villages within Dwarakeswar watershed area. The samples have been analysed to determine physical parameters like pH, EC, TDS and Hardness, the chemical parameters like Na, K, Ca, Fe, HCO3, SO4 and Cl. From the analysed data, some parameters like Sodium Absorption Ratio (SAR), Soluble Sodium Percentage (SSP), Residual Sodium Carbonate (RSC), Total Hardness (TH), Magnesium Absorption Ration (MAR) and Kelly’s Ratio (KR) have also been determined. The distribution pattern of TDS and chlorides, which are the general indicators of groundwater quality reveals that on an average the ground water is fresh and potable except the ground water in and around Teghari, Gara and Satyatan Primary school where the groundwater is not potable and may affect the health of local population because concentration of TDS exceeds the desirable limits of 500 mg/L. The aerial distribution of Total Dissolved Solids (TDS) reveals that highest concentration is recorded at Gara and Teghri and the lowest concentrations is noted in Suburdih and Kalabani. SAR values were ranged between 0.09 - 0.54 meq/L in pre monsoon and 0.01 - 0.24 meq/L in post-monsoon. It is evident from the whole sample set that the SAR value is excellent in all the samples. Hence, our findings strongly suggest that all the abstracted groundwater samples from the study area were suitable for irrigation. Results of analyses for physical and chemical parameters of groundwater in this area was found to be within the desirable Bureau of Indian Standards and World Health Organisation limits for drinking water.

Value distribution of certain differential polynomials
Indrajit Lahiri
International Journal of Mathematics and Mathematical Sciences , 2001, DOI: 10.1155/s0161171201011036
Abstract: We prove a result on the value distribution of differentialpolynomials which improves some earlier results.
A note on Mues' conjecture
Indrajit Lahiri
International Journal of Mathematics and Mathematical Sciences , 2001, DOI: 10.1155/s0161171201010912
Abstract: We prove that Mues' conjecture holds for the second- and higher-order derivatives of a square and higher power of any transcendental meromorphic function.
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