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Search Results: 1 - 10 of 391 matches for " Anindita Lahiri "
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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.

Standing Waves in a Non-linear 1D Lattice : Floquet Multipliers, Krein Signatures, and Stability
Subhendu Panda,Anindita Lahiri,Tarun K. Roy,Avijit Lahiri
Physics , 2004, DOI: 10.1016/j.physd.2005.07.018
Abstract: We construct a class of exact commensurate and incommensurate standing wave (SW) solutions in a piecewise smooth analogue of the discrete non-linear Schr\"{o}dinger (DNLS) model and present their linear stability analysis. In the case of the commensurate SW solutions the analysis reduces to the eigenvalue problem of a transfer matrix depending parametrically on the eigenfrequency. The spectrum of eigenfrequencies and the corresponding eigenmodes can thereby be determined exactly. The spatial periodicity of a commensurate SW implies that the eigenmodes are of the Bloch form, characterised by an even number of Floquet multipliers. The spectrum is made up of bands that, in general, include a number of transition points corresponding to changes in the disposition of the Floquet multipliers. The latter characterise the different band segments. An alternative characterisation of the segments is in terms of the Krein signatures associated with the eigenfrequencies. When one or more parameters characterising the SW solution is made to vary, one occasionally encounters collisions between the band-edges or the intra-band transition points and, depending on the the Krein signatures of the colliding bands or segments, the spectrum may stretch out in the complex plane, leading to the onset of instability. We elucidate the correlation between the disposition of Floquet multipliers and the Krein signatures, presenting two specific examples where the SW possesses a definite window of stability, as distinct from the SW's obtained close to the anticontinuous and linear limits of the DNLS model.
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.
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.
Data Aggregation Techniques in Wireless Sensor Network: A Survey
Anindita Ray,Debashis De
International Journal of Engineering Innovations and Research , 2012,
Abstract: Data aggregation is essential for the efficient operation of wireless sensor network. Data aggregation has been widely recognized as an efficient method to reduce energy consumption by reducing the number of packets sent. In this paper a comprehensive review of the existing data aggregation techniques in wireless sensor network have been presented. Suitable criterias have been defined to classify existing solutions. In this paper several open issues have been identified and discussed which propose directions for future research in this area.
Tris(dicyclohexylammonium) hydrogen [1-hydroxy-2-(1H-imidazol-1-yl)-1-phosphonatoethane]phosphonate ethanol monosolvate monohydrate
Anindita Sarkar,Ignacy Cukrowski
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811042206
Abstract: In the title compound, 3C12H24N+·C5H7N2O7P23 ·C2H6O·H2O, the zoledronic acid molecule is singly protonated and stabilized by an intramolecular O—H...O interaction. The three-dimensional crystal structure is stabilized by intermolecular O—H...O, O—H...N and N—H...O interactions. The ethanol solvent molecule is disordered over two positions; the site-occupancy factor of the major component is 0.510 (4).
N,N-Dimethylethane-1,2-diaminium bis(3-hydroxybenzoate)
Anindita Sarkar,Ignacy Cukrowski
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811040578
Abstract: In the title compound, C4H14N22+·2C7H5O3 , both the N,N-dimethylethylenediamine N atoms are protonated and two 3-hydroxybenzoate anions act as counter-ions. In the crystal, anions and cations are linked by a network of N—H...O and O—H...O hydrogen bonds.
Diah Anindita,Khoiruddin Bashori
Abstract: In the middle age, adjustment to developmental tasks will affect marital relationship. This study aimed to determine the cohesiveness of husband and wife who have entered middle adulthood, covering aspects of solidarity, marital satisfaction, interest, and affiliates and also the factors that affect the cohesiveness of husband and wife when the marriage age of 20 years or more. Subjects are three pairs of husband and wife who are legally married for over 20 years and each individual’s age between 40-60 years old. This qualitative research used the case study approach and collected data by semi-structured interviews and nonparticipant observation. The results showed that the cohesiveness of husband and wife owned in middle age is different in each pair. In the first couple showed low cohesion, high on the second couple, and medium for the third couple. In the third couple, there is a change before the peak of the conflict in mid-2011 by now. Factors that affect the cohesiveness of husband and wife in middle age is a social perception, social support, emotional regulation, a period of quiet in the middle ages, the intensity of togetherness, understanding of gender, temperament, and love.
Cryptic successors unrevealed even by network analysis: A comparative study of two paper wasp species
Anindita Bhadra,Ferenc Jordan
Network Biology , 2013,
Abstract: Understanding queen succession could be a key contribution to the better understanding of the origins and evolution of eusociality. In order to investigate the nature of organizational changes during queen succession, we analyzed two closely related paper wasp species (Ropalidia cyathiformis and Ropalidia marginata). We compared the effects of in vivo and in silico queen removal on the structure of their interaction networks (the former resulting in queenless colonies with potential queens). We studied several structural measures. There is no major structural difference between full (queenright) and in silico queen-removed colonies but there are major differences between queenless and in silico queen-removed ones. This suggests that queen succession is accompanied by a major reorganization of the society, in Rm but not so much in Rc. We also analysed the centrality ranks of potential queens and found that their positional importance changes a lot during queen succession in R. marginata, as they are processed in the colony. In the queenright colonies of R. marginata, the direction of links is a better predictor of the identity of the potential queen than the strength of links.
SILC-A Secured Internet Chat Protocol
International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering , 2013,
Abstract: The Secure Internet Live Conferencing (SILC) protocol, a new generation chat protocol provides full featured conferencing services, compared to any other chat protocol. Its main interesting point is security which has been described all through the paper. We have studied how encryption and authentication of the messages in the network achieves security. The security has been the primary goal of the SILC protocol and the protocol has been designed from the day one security in mind. In this paper we have studied about different keys which have been used to achieve security in the SILC protocol. The main function of SILC is to achieve SECURITY which is most important in any chat protocol. We also have studied different command for communication in chat protocols.
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