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Search Results: 1 - 10 of 1704 matches for " Tanushree Biswas "
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Image Partition near an Idempotent
Tanushree Biswas
Mathematics , 2014,
Abstract: Some of the classical results of Ramsey Theory can be naturally stated in terms of image partition regularity of matrices. There have been many significant results of image partition regular matrices as well as image partition regular matrices near zero. Here, we are investigating image partition regularity near an idempotent of an arbitrary Hausdorff semitopological semigroup (T, +) and a dense subsemigroup S of T . We describe some combinatorial applications on finite as well as infinite image partition regular matrices based on the Central Sets Theorem near an idempotent of T .
Centrally Image partition Regularity near 0
Tanushree Biswas,Dibyendu De,Ram Krishna Paul
Mathematics , 2013,
Abstract: The notion of Image partition regularity near zero was first introduced by De and Hindman. It was shown there that like image partition regularity over $\mathbb{N}$ the main source of infinite image partition regular matrices near zero are Milliken- Taylor matrices. But Milliken- Taylor matrices are far apart to have images in central sets. In this regard the notion of centrally image partition regularity was introduced. In the present paper we propose the notion centrally partition regular matrices near zero for dense sub semigroup of $(\ber^+,+)$ which are different from centrally partition regular matrices unlike finite cases.
Design of Aperture Coupled Microstrip Antenna Using Radial Basis Function Networks  [PDF]
Tanushree Bose, Nisha Gupta
Wireless Engineering and Technology (WET) , 2010, DOI: 10.4236/wet.2010.12010
Abstract: This paper, two Artificial Neural Network (ANN) models using radial basis function (RBF) nets are developed for the design of Aperture Coupled Microstrip Antennas (ACMSA) for different number of design parameters. The effect of increasing the number of design parameters on the ANN model is also discussed in this work. The performances of the models when compared are found that on decreasing the number of design parameters, accuracy of the model is in-creased. The results given by the prepared models are comparable with the results of the IE3D software. So, these models are accurate enough to measure the design parameters of ACMSAs. Thus the neural network approach elimi-nates the long time consuming process of finding various designing parameters using costly software packages.
Memory, Nature and Countryside : A Study of the Selected Poems of Les Murray and Pradip Kumar Patra
Nayak, Tanushree
Journal of Literature, Culture and Media Studies , 2011,
Abstract: The paper not just presents two contemporary poets from two different continents, but also their distinct ways of thinking and articulating the lines of their poems with deep conviction and realization. With allegiance to the respective country, each expresses his own construction and vision of thecountryside with clarity and warmth . It is a common phenomenon in both Australia and India that the countryside is vanishing very fast with migration, industrialization and urbanisation. Les Murray and Pradip Kumar Patra are verysensible to such devastating phenomena. They express their concern for such havoc and build an alternative world or space in their poetry which the readers could understand and appreciate. The tone of the poets is calm, their emotion is also not fluctuating and thematically they are large and varied. When Patra is meditative like Wordsworth , Murray is imagistic like Keats. Needless to say, both the poets breathe a life of their own to their experiences and perceptions. Their poems ,actually , say what imagination is . They just add wings to the realistic elements. Those just fly with the motion of ideas that the poets give.
130 GeV gamma ray line and enhanced Higgs di-photon rate from Triplet-Singlet extended MSSM
Basak, Tanushree;Mohanty, Subhendra
High Energy Physics - Phenomenology , 2013,
Abstract: We propose an economic extension of minimal supersymmetric standard model with a SU(2) singlet and Y=0 triplet, which can explain (i) the 125 GeV Higgs boson without fine tuning, (ii) the 130 GeV $\gamma$-ray line seen at Fermi-LAT, (as well as a second photon line at 114 GeV)(iii) an enhanced Higgs di-photon decay rate seen by ATLAS, while being consistent with dark matter relic density and recent XENON 100 exclusion limits on spin-independent direct detection cross-section. We obtain the required cross-section of $10^{-27}cm^3s^{-1}$ for the 130 GeV $\gamma$-ray flux through the resonant annihilation of dark matter via pseudoscalar triplet Higgs of mass $\sim$260 GeV. The dark matter is predominantly bino-higgsino which has large couplings with photons (through higgsino) and gives correct relic density (through bino). We get the enhanced Higgs diphoton decay rate, $R_{\gamma \gamma}\simeq 1.24$ dominantly contributed by the light chargino-loops, which can account for the reported excess seen in the $h\rightarrow \gamma \gamma$ channel by ATLAS.
Anthracene coupled adenine for the selective sensing of copper ions
Kumaresh Ghosh,Tanushree Sen
Beilstein Journal of Organic Chemistry , 2010, DOI: 10.3762/bjoc.6.44
Abstract: Anthracene-based adenines 1 and 2 have been designed and synthesized, and their metal ion recognition properties have been established fluorometrically. Both molecules exhibit Cu2+ induced ON-OFF type signaling patterns over the other representative metal ions studied. Compound 1 exhibits 97% quenching of emission in the presence of Cu2+ whilst derivative 2 shows 81% quenching under similar experimental conditions.
Estimation of survival times of HIV-1 infected children for doubly and interval censored data
Gurprit Grover,Tanushree Banerjee
Electronic Journal of Applied Statistical Analysis , 2011,
Abstract: International studies have established the association of antiretroviral (ARV) therapy and survival in HIV-infected patients. Our study was carried out to confirm the influence of ARV therapy on survival in a group of vertically transmitted HIV-1 infected children. We employed Turnbull’s methods based on double censoring (1974) and interval censoring (1976) to estimate the survival time distribution for children receiving and not receiving ARV therapy. It was noted that children undergoing ARV therapy had a longer survival than those not under treatment. In our study group, children under treatment survived for 15 years with a probability of almost 95% while children not under treatment had a survival of 11 years with a probability of 75%. Further, the estimates of survival times as obtained by the interval censoring mechanism were found to be more precise than those obtained by the double censoring mechanism. We even utilized imputation approach which showed that the width of the band of estimates was narrower for interval censored data as compared to double censored data.
Triplet-Singlet Extension of the MSSM with a 125 Gev Higgs and Dark Matter
Tanushree Basak,Subhendra Mohanty
Physics , 2012, DOI: 10.1103/PhysRevD.86.075031
Abstract: We study the extension of Minimal Supersymmetric Standard Model by adding one singlet and one hypercharge zero SU(2) triplet chiral superfield. The triplet sector gives an additional contributions to the scalar masses and we find that the lightest CP-even Higgs boson can have a mass of 119-120 GeV at the tree level, and radiative correction raises the value to 125 GeV. In this model no significant contributions from stop loops is needed to get the required Higgs mass which alleviates the fine tuning problem of fixing the stop mass to a high precision at the GUT scale. In addition this model gives a neutralino dark matter of mass around 100 GeV which is a mixture of Higgsino and Triplino with a dark matter density consistent with WMAP observations. The spin-independent scattering cross-section with nucleons is 10^(-43) cm^2, which makes it consistent with the bounds from direct detection experiments like XENON100 and others.
Constraining Minimal $U(1)_{B-L}$ model from Dark Matter Observations
Tanushree Basak,Tanmoy Mondal
Physics , 2013, DOI: 10.1103/PhysRevD.89.063527
Abstract: We study the $B-L$ gauge extension of the Standard Model which contains a singlet scalar and three right-handed neutrinos. The vacuum expectation value of the singlet scalar breaks the $U(1)_{B-L}$ symmetry. Here the third generation right-handed neutrino is qualified as the dark matter candidate, as an artifact of $Z_2$-charge assignment. Relic abundance of the dark matter is consistent with WMAP9 and PLANCK data, only near scalar resonances where dark matter mass is almost half of the scalar boson masses. Requiring correct relic abundance, we restrict the parameter space of the scalar mixing angle and mass of the heavy scalar boson of this model. Besides this, the maximum value of spin-independent scattering cross-section off nucleon is well-below the {\sc Xenon100} and recent LUX exclusion limits and can be probed by future {\sc Xenon1T} experiment. In addition, we compute the annihilation of the dark matter into two photon final state in detail and compare with the Fermi-LAT upper bound on $\langle\sigma v\rangle_{\gamma \gamma}$ for NFW and Einasto profile.
Zinc and Chromium Load in Road Dust, Suspended Particulate Matter and Foliar Dust Deposits of Anand City, Gujarat  [PDF]
Tanushree Bhattacharya,Sukalyan Chakraborty,Dhara Tuteja,Mitul Patel
Open Journal of Metal (OJMetal) , 2013, DOI: 10.4236/ojmetal.2013.32a1006
Abstract: Anand, the milk capital of India, is a developing city with increasing vehicles and developmental activities going on at a fast pace. This study attempts to investigate the zinc and chromium concentration in street dust, suspended particulate matter and in foliar dust deposits. Ten sampling locations were selected based on the traffic density on the roads and different anthropogenic activity. Sampling was carried out in the dry months of January to March 2011. The range of Zn and Cr was 16.82 - 108.29 ppm and 118 - 151.5 ppm in the street dust respectively. Zn concentration in Suspended particulate matter lies in the range of 12.41 to 86 ppm and Cr concentration between 75 to 130 ppm. The range of Cr in foliar deposited dust varied from 79.54 ppm to 31 ppm. Whereas, for Zn maximum concentration was in S10 which is 42.34 ppm and minimum was in site S9, 23.73 ppm. ANOVA single factor showed that at 0.05 level of significance site wise variation of zinc and chromium concentration in SPM, Street dust and foliar deposited dust was not significant signifying similar source of contamination. Which is further strengthened by the good positive correlation found between the Zn and Cr concentration of street dust, leaf deposited dust and SPM. The Contamination Factor in the sites where metal concentration was high was 1.24 in S10 and 1.06 in S5 for Zn. For chromium the value of CF was 1.77 in S10 and 1.67 in S5. These values indicate that street dust is moderately contaminated with respect to zinc and chromium.
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