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  • 1
    Electronic Resource
    Electronic Resource
    Involutive automorphisms and Iwasawa decomposition of some hyperbolic Kac–Moody algebras (1999)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 40 (1999), S. 501-510 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: The involutive automorphisms of hyperbolic Kac–Moody algebras are computed from Satake diagrams of these algebras which are then used to furnish a general procedure of their Iwasawa decomposition. In particular Â1(1) and Â2(1) are considered as representative examples to illustrate the efficacy of the underlying treatment. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.532783
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  • 2
    Electronic Resource
    Electronic Resource
    Iwasawa decomposition of affine Kac–Moody algebras using Satake diagrams (1998)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 39 (1998), S. 5015-5023 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: We carry out the Iwasawa decomposition of the affine Kac–Moody algebras within the general framework of involutive automorphisms which are determined with the help of the Satake diagrams corresponding to these algebras. The parabolic subalgebras essential for the construction of induced representations are computed from the Langlands decomposition. In particular, we consider the untwisted versions, viz., A1(1) and A2(1), as representative examples for the purpose of illustration. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.532507
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  • 3
    Electronic Resource
    Electronic Resource
    On the quantum bound states for the potential V(r) = ar^2+br^-^4+cr^-^6
    Amsterdam : Elsevier
    Physics Letters A 170 (1992), S. 335-338 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(92)90882-M
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  • 4
    Electronic Resource
    Electronic Resource
    Methane emission from flooded rice fields under irrigated conditions (1994)
    Springer
    Biology and fertility of soils 18 (1994), S. 245-248 
    Details
    ISSN: 1432-0789
    Keywords: Methane emission ; Flooded rice field ; Varietal variation ; Root oxidase activity ; Diurnal variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In a study on CH4 emission from flooded rice fields under irrigated conditions, fields planted with rice emitted more methane than unplanted fields. The CH4 efflux in planted plots varied with the rice variety and growth stage and ranged from 4 to 26 mg h-1m-2. During the reproductive stage of the rice plants, CH4 emission was high and the oxidation power of rice roots, in terms of α-naphthylamine oxidation, was very low. The CH4 emission reached a maximum at midday and declined to minimum levels at midnight, irrespective of the rice variety. The peak CH4 emission at midday was associated with higher solar radiation and higher soil/water temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00647675
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  • 5
    Electronic Resource
    Electronic Resource
    On neutron charge structure (1991)
    Springer
    Czechoslovak journal of physics 41 (1991), S. 321-325 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The aim of the present work is to investigate the charge structure of neutron by calculating its root mean square charge radius 〈r n 2 〉1/2 and the corresponding charge form factor,G n(q), within the general framework of quark-parton model. The neutron (the nucleon in general) is considered to be disc-like in conformity with the idea of Lorentz invariance. Using the proton charge radius, 〈r p 2 〉=0·707 fm2 as input, our calculations not only reproduce the observed negative sign correctly but also give reasonable value for the magnitude of 〈r n 2 〉 when compared with the experimental limits. −0·16≦〈r n 2 〉≦−0·11 (fm2). Predictiona are also made for the proton and the neutron charge form factors and the results compared with the data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01599033
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  • 6
    Electronic Resource
    Electronic Resource
    Wet-only and bulk deposition studies at New Delhi (India) (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2137-2142 
    Details
    ISSN: 1573-2932
    Keywords: Wet-only ; Bulk samples ; Neutralization factors ; Soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Rain water samples were collected at New Delhi during the monsoon of 1994 at a height of 30 m above the ground level using a wet-only collector. Simultaneously, bulk samples from two different heights at 30 m and 13 m were collected. Frequency distribution of pH in wet-only samples revealed that rain was mostly alkaline Four out of 23 events were observed to be acidic where the ratio of (Ca+Mg+NH4)/(SO4+NO3) was very low. pH and ionic constituents were higher in bulk samples than in wet-only samples. On an average, the concentration in bulk samples at 30m height exceeded the wet-only samples by 13% while bulk samples collected at 13m height had 19% higher concentration than the bulk samples at 30m height and 32% higher than wet-only. The acidity of ram water was mainly contributed by sulphuric acid rather than nitric acid. At the height of 30 m, the acidity was primarily neutralized by NH4 while at 13 m height, it was buffered by Ca and Mg indicating the influence of dust particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186150
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  • 7
    Electronic Resource
    Electronic Resource
    Dirac equation in Robertson-Walker metric (1991)
    Springer
    International journal of theoretical physics 30 (1991), S. 1691-1695 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We recast the Dirac relativistic equation within the theoretical framework of the Robertson-Walker metric, using spatial hypersurfaces that are essentially curved, and hence more general, as compared to the flat ones employed by Barut and Duru.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00673645
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  • 8
    Electronic Resource
    Electronic Resource
    Charge radii of neutral baryons (1992)
    Springer
    Czechoslovak journal of physics 42 (1992), S. 545-548 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The charge structure of low lying spin 1/2 (8) baryons is investigated in terms of their radii, 〈r2〉, using the assumption of nonfactorizability of tranverse parton momentum distribution and the requirement that the u- and d-quarks inside a nucleon are described by “separate” spatial distributions. Explicit calculations lead to the startling prediction that the charge radii of all neutral baryons are negative in sign and nonvanishing in magnitude.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01598003
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  • 9
    Electronic Resource
    Electronic Resource
    Integrable classical systems in higher dimensions (1990)
    Springer
    International journal of theoretical physics 29 (1990), S. 299-309 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A general method for the construction of the second constant of motion (up to second order) for higher-dimensional classical systems is carried out. Correspondingly, the first- and the second-order potential equations are obtained whose solutions can directly provide the integrable systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00673632
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  • 10
    Electronic Resource
    Electronic Resource
    A study on short-time sampling of individual rain events at New Delhi during monsoon, 1994 (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2143-2148 
    Details
    ISSN: 1573-2932
    Keywords: rain event ; pH ; intensity ; crustal ; antecedent periods
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Rain water samples of equal volume (50 mL) were collected from two couvective showers at New Delhi on 28 July and 23 August during the monsoon, 1994. The variation of constituents of both the showers showed different trends which might have been due to different antecedent periods. The first shower occurred after an antecedent period of 2–3 hours while the second shower occurred after a 14 day interval. The first shower had acidic pH (〈5.6) and relatively higher concentration of NH4, SO4, NO3, Cl, F and K indicating insignificant below cloud scavenging. The second shower had alkaline pH (〉5.6) and relatively higher concentrations of Ca and Mg. The higher concentration of Ca and Mg in the second shower were due to the loading with particulate matter during the preceding 14 days which made below cloud scavenging significant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186151
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