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61.
62.
Srubabati Goswami Raghavan Rangarajan K. Agashe A. Bandyopadhyay K. Bhattacharya B. Brahmachari C. Burgess E. J. Chun D. Choudhury P. K. Das A. Dighe R. Godbole S. Goswami N. Gupta M. Kaplinghat D. Indumathi J. Forshaw Y. Y. Keum B. Layek D. Majumdar N. Mahajan P. Mehta R. N. Mohapatra N. Mondai S. More Y. Nir S. Pakvasa M. K. Parida M. Ravikumar G. Rajasekaran P. Ramadevi R. Rangarajan S. D. Rindani D. P. Roy P. Roy N. Sahu A. Samanta Y. Shadmi A. M. Srivastava S. Uma Sankar R. Vaidya U. Yajnik 《Pramana》2004,63(6):1391-1405
This is the report of neutrino and astroparticle physics working group at WHEPP-8. We present the discussions carried out
during the workshop on selected topics in the above fields and also indicate progress made subsequently. The neutrino physics
subgroup studied the possibilities of constraining neutrino masses, mixing and CPT violation in lepton sector from future
experiments. Neutrino mass models in the context of Abelian horizontal symmetries, warped extra dimensions and in the presence
of triplet Higgs were studied. Effect of threshold corrections on radiative magnification of mixing angles was investigated.
The astroparticle physics subgroup focused on how various particle physics inputs affect the CMBR fluctuation spectrum, and
on brane cosmology. This report also contains an introduction on how to use the publicly available code CMBFAST to calculate
the CMBR fluctuations. 相似文献
63.
The work presented is part of a bigger effort to design an automated highway system (AHS) to improve the capacity and safety of current highways. Automation of highways and, in particular, platooning of vehicles raise a number of control issues. In the design proposed by Varaiya,(see IEEE Trans. Automat., Contr., vol.38, no.2, p.195-207, 1993), these issues are addressed by a hierarchical structure consisting of both discrete-event and continuous controllers. Our work is an attempt to construct a consistent interface between these two types of controllers. The proposed design is in the form of a set of finite-state machines (FSMs) that interact with the discrete controllers through discrete commands and with the continuous controllers by issuing commands that get translated to inputs for the vehicle actuators. The operation of the proposed design is verified using COSPAN and tested in simulation. The interface design provides insight into interesting problems related to the hybrid nature of the AHS as it touches on both the discrete and continuous worlds 相似文献
64.
65.
S. V. Godbole P. N. Iyer M. L. Jayanth Kumar M. D. Sastry 《Journal of Radioanalytical and Nuclear Chemistry》1996,214(1):9-16
Double sulfates of thallium and lanthanides form an interesting series of compounds with first fractional crystallization leading to the formation of tetrahydrated double sulfates. The radiation induced defects including changes in the oxidation states were studied by carrying out EPR investigations of -irradiated Tl (I) Ln (III) (SO4)2.4H2O (Ln=Sm, Eu and Nd) compounds. The important finding of these investigations is the formation of a radiation-induced paramagnetic center Tl2+ simultaneously with that of Eu2+, revealing their intrinsic association. Similar formation of Tl2+ was not observed in other rare earth salts, implying that the stability of the half-filled electronic configuration of Eu2+ may be responsible for the stabilization of Tl2+. Their relaxation back to Eu3+ and Tl+ simultaneously at 255 K gives further confirmation of their association and suggests that the matrix intrinsically does not favor the stabilization of Eu2+ as reported in a number of other matrices. The hyperfine coupling constant for Tl2+ was calculated using the Breit-Rabi equation and was found to be 80 GHz. 相似文献
66.
A linear free energy relationship was found for the log (mole fraction) of solutes in a wide variety of organic solvents with the solvatochromic parameters and the Hildebrand solubility parameter. The solutes were the highly dipolar gases sulfur dioxide, hydrogen chloride, hydrogen bromide, and ammonia at 25°C and 1 atm. partial pressure of the solute. It was found that correlations were greatly improved if solvatochromic parameters for the solvent as a monomer were used rather than the values for the bulk solvent. In solutions with these very dipolar gases, the mole ratio of solute to solvents approaches unity in many of the solutions, so a molecule of solute is interacting primarily with a particular molecule of the solvent. Therefore, the use of the solvatochromic parameters for the solvent as monomer is physically reasonable. 相似文献
67.
68.
Jain A Mohapatra M Godbole SV Tomar BS 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2008,71(3):1007-1010
Complexation of Eu(III) with alpha-hydroxy isobutyric acid (HIBA), a model compound of humic acid, has been studied by time resolved fluorescence spectroscopy. The ratio of fluorescence intensity of the two peaks at 616 and 592 nm (I(616/592)) was found to increase with increasing ligand to metal ratio. The I(616/592) data was used to deduce the stability constant of Eu-HIBA complexes of the type ML(i) (i=1-3). The formation of multiple ligand complexes was also corroborated by lifetime data which was found to increase with increasing [HIBA]/[Eu] ratio thus indicating replacement of coordinated water molecules by HIBA. 相似文献
69.
Z. Leppert Z. Majewska K. Ho C. S. Wan S. H. Wen F. W. Cheng G. Lunde F. Stiebel L. M. Labaune A. Jermakow W. Leithe F. Fritz W. F. Geddes F. H. Lehberg A. Afanassjew M. Podolskaja M. Sserga K. Höll E. Delvaux N. N. Godbole A. M. Se P. S. Varma G. M. Garde M. Procopio H. Levin Alma Tomingas M. E. Marks C. H. Lea G. S. Fawcett F. M. Biffen F. D. Snell 《Analytical and bioanalytical chemistry》1938,113(5-6):235-240
70.
R M Godbole 《Pramana》1993,41(1):83-105
In this talk I review theoretical bounds on mass of the Higgs scalar in the Standard Model (SM) and then summarise current experimental limits from the LEP experiments. Following this I discuss the search strategies for the SM Higgs at LEP 200 and the TeV energye + e ? colliders which are under discussion. This will be followed by a summary of the Higgs search potential of the pp supercolliders such as SSC/LHC. I then close with a brief discussion of a ‘Dark Higgs’ whose dominant decay modes are into invisible channels. 相似文献