Spontaneous Supersymmetric Generation of an Indeterminate Mass Scale and a Possible Light Sterile Neutrino

If a global continuous symmetry of a supersymmetric field theory is spontaneously broken while preserving the supersymmetry, the resulting theory has a massless superfield. One of its two bosonic degrees of freedom is the familiar phase rotation of the usual massless Nambu-Goldstone boson, but the other is a scale transformation. An indeterminate mass scale is thus generated. In the fermion sector, a seesaw texture appears which may be suitable for a possible light sterile neutrino. This feature persists even after the gauging of the continuous symmetry or the breaking of the supersymmetry to resolve the aforementioned mass-scale ambiguity.Comment: 9 pages, expanded to include the discussion of a possible sterile neutrin

Unsteady Temperature Distribution for Laminar Flow in a Porous Straight Channel

Temperature distribution in a viscous incompressible fluid flowing between two parallel porous flat plates has been investigated when the lower plate is injecting the fluid while the upper one is sucking it with the same rate. Viscous dissipation has been neglected and the rate of heat generation per unit volume per unit time has been taken to be a function of time. Laplace transform technique has been used to obtain an expression for the temperature distribution. Taking the rate of heat generation as an oscillating function of time, numerical work has been done to demonstrate the effects of the variation of the cross-flow velocity on the temperature distribution

A Note on the Temperature Distribution in a Porous Annulus

Unsteady temperature distribution for flow of an incompressible viscous fluid in a porous annulus has been investigated under the assumption that the rate of injection of the fluid at the inner cylinder is equal to the rate of suction of the fluid at the outer one. Viscous dissipation has been neglected while rate of heat generation in the fluid has been accounted for. An expression for the temperature distribution has been obtained using Laplace transform technique and taking the temperatures of the boundaries to be functions of time

Specific heat and Thermodynamics of Titanate Perovskite Materials

Specific heat and thermodynamical properties of the LaTiO3+?/2 have been investigated for the first time using extended rigid ion model (ERIM). With the increase of nominal hole doping ?, the system undergoes a phase change from an insulating phase to a metallic phase at ?cIM = 0.05 and the low-temperature antiferromagnetic phase disappears at ?cmag = 0.08. LaTiO3+?/2 has been suggested to have promising scientific and technological applications. Our computed specific heat results follow the same trends of variation with corresponding experimental data. The values of specific heats also increase with temperature. The theoretically computed thermodynamical properties of LaTiO3+?/2 compound are in good agreement with the available experimental results. Keywords: Thermodynamical properties, Perovskites, Specific heat, Debye temperature, Cohesive energ

Heat Transfer for Laminar Flow Through Parallel Porous Disks

The problem of temperature distribution and heat transfer for laminar flow through two parallel porous disks, has been investigated when the flow is entirely due t injection or suction at the two disks. Viscous dissipation terms have been included in the energy equation and the uniform injection/suction velocities at the two disks, are assumed to be small. The boundaries are maintained at constant temperature. The variation of temperature and Nusselt numbers at the two disks, is shown graphically, for various of the injection/suction velocities

Reduction of In(III) at d.m.e. in Presence of Glyoxalate Ions & Determination of Composition & Stability Constants of the Complexes

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Receding the entrainment of concomitant Ultrafines by MGS in Lead Concentrate of Rajpura - Dariba Concentrator

Due to the fine dissemination and complex mineralogy the Rajpu ra-Dariba (RD) lead --inc ore poses special problems in concentration by corrventional froth flotation. In order to achieve the desired metallurgical results 'Multi Gravity Separator, a twin drum system, has recently been installed in the lead circuit of RD concentrator. Open and closed trial tests were conducted, without sacrificing the economic metal tt•ith substantial abatement of ultrafine card fine srliceuus and graphite matter in lead concentrate. The metallurgical alludes achieved are (i) over 85% -400 mesh fines are separated in the form of MGS tails whereas 53% -400 mesh are obtained in MGS concentrate from the feed(lead rougher concentrate) 77% -400 mesh with 52% Pb, I% Gr. C and 2.5% ISM in respective Wt. %distribution i.e., 47.3 and 3, (ii) tails are characterised br- >93% ultrafine of <20 microns particles encompass 21 % Pb, 8% Gr: C and 39% ISM with respective Wt. % distribution i.e., 32. 93, 83% in -400 mesh fr-action, resulting in effective rejection of Gr. C and ISM, (iii)conventional lead concentrate consists of 28% +400 mesh material only with all the assorted fines and ultrafines. Mine ralogically, it is established that composite bigger particles of sulphide gangue and graphite are the main contributor. for silica and graphite in MGS concentrate. Over 39% by vol. fines are alienated as MGS tails, in the form of free sulphide, gangue and graphite minerals. Installation of MGS in lead circuit, confirms the significant reduction of Gr:C and ISM in particular to high GMS_feed rnix in lead concentrate in comparison to lead concentrate by conventional route

The Impact of Zero-Dispersion Wavelength Fluctuations in > 110 nm Fiber Optical Raman+Parametric Amplification

In this paper numerical results supported by experimental results, demonstrate that zero-dispersion wavelength fluctuations are found to be the main reason for the gain bandwidth limitation even in fiber optical parametric amplifiers employing ultra-short (25 m) gain fibres