Showing papers by "Indian Institute of Technology Bombay published in 1969"
TL;DR: In this paper, a non-thermodynamic approach is proposed for the analysis of experimental capacitance data obtained with the adsorption of camphor undergoing two-dimensional association at the mercury/solution interface.
50 citations
TL;DR: In this paper, the relation given by Vriens for the total ionization cross-sections has been utilised to obtain ionisation cross-section per unit energy range for slow secondary electrons.
38 citations
TL;DR: A new and simple method has been developed for the rapid extraction of tungsten(VI) with mesityl oxide and it is shown to be applicable to an alloy steel.
10 citations
9 citations
TL;DR: In this article, a relation between the force constants and bond energies of polyatomic molecules of bent XY2, pyramidal XY3, and tetrahedral XY4 types was deduced by employing an approximately separable potential function for the molecules and using specific functional forms for the bonded and nonbonded interactions.
6 citations
TL;DR: In this article, the absorption of energy and power of a r.f. wave in the same region is analyzed and permittivity of the plasma is found to decrease with increase of frequency in the absorption band.
Abstract: In previous papers (Bhagavat and Nandedkar 1968 b, c, d, e) the investigations of the damped oscillations, r.f. energy transport and backward waves in a plasma in the region of anomalous dispersion were carried out. In this paper tho absorption of energy and power of a r.f. wave in tho same region is analysed. Permittivity of the plasma is found to decrease with increase of frequency in the absorption band. The absorption is maximum at the resonance.
4 citations
TL;DR: In this article, the elastic scattering of electrons by helium atoms is obtained in static field and dipole polarization plus exchange approximation and also in plane wave approximation, and the results are in good agreement with each other and also with the experimental data.
4 citations
TL;DR: In this article, a fast and selective method for solvent extraction of manganese with tributyl phosphate was proposed, and it is possible to quantitatively extract the metal from the organic phase with 40% Tributyl Phosphate in xylene from solutions containing 1 M hydrochloric acid and 2.5 M aluminum chloride.
Abstract: A fast and selective method is proposed for solvent extraction of manganese with tributyl phosphate. It is possible to quantitatively extract manganese with 40% tributyl phosphate in xylene from solutions containing 1 M hydrochloric acid and 2.5 M aluminum chloride as the salting-out agent. The metal from the organic phase is stripped with water and is determined photometrically as its complex with formaldoxime. The probable composition of the extractable species at 1 M acidity is [MnCl2·3TBP]. It is possible to extract manganese in the presence of a twentyfold excess of common ions, but mercury, copper, iron, bismuth, and vanadium interfere. The standard deviation is ± 1.05%.
4 citations
TL;DR: In this paper, the attenuation constant, phase constant, and phase volocity of a radially propagated electromagnetic wave within the conical guide were derived for an infinitely long right circular cone with perfectly conducting walls.
Abstract: Available approximations in the angular part of the solution of the wave equation for an infinitely long right circular cone with perfectly conducting walls have been used to simplify the evaluation of the eigenvalues of the wave functions relating to wave propagation in a conical region. Exact expressions have been derived for the attenuation constant (α ), phase constant (β) and phase volocity (vP) of a radially propagated electromagnetic wave within the conical guide. Variations in α, β and vP with radial distance have been studied as a function of the flare (semi-vertical) angle. Expressing the resistive and reactive part of the wave impedance in terms of α and β their variation with radial distance has been studied. The wave functions derived from an acoustic analogue for the TE11 mode of excitation in a previous paper by the authors are identical with those obtained here, when the flare angle is very small and the axial length is large.
3 citations
TL;DR: In this paper, the Lockhart-Martinelli parameters Φ and X for two-phase flow, suitably modified in the present paper with the help of the analysis of Smithberg and Landis for single phase flow with twisted tapes, has been found to be satisfactory for the estimation of two phase pressure drops.
2 citations
TL;DR: In this paper, the impulse response of a linear time invariant system is partitioned by dividing the time axis into equal intervals of time, and the system response is expressed as a sum of these partitioned portions.
Abstract: Impulse response of a linear time invariant system is partitioned by dividing the time axis into equal intervals of time. Then the impulse response is expressed as a sum of these partitioned portions. Each individual portion is approximated by a finite sum of orthogonalized sinusoids satisfying integral squared error criteria. Four different sets are given for this purpose. If the time reversed functions from these sets are applied to the system then the sampled values of the system response at the partitioning instants directly yield the system coefficients as required for the least integral squared error. Knowing these coefficients the best approximation to the impulse response can be constructed as illustrated by the examples considered. Sampled values of the Fourier transform of system impulse response are obtained as a by-product.
01 Mar 1969
TL;DR: The steady state response of any differential equation is a polynomial of the same degree as the input if the coefficients of the differential equation are so chosen that all the roots of the characteristic equation have nonzero negative real parts.
Abstract: The steady-state response of any differential equation is a polynomial of the same degree as the input if the coefficients of the differential equation are so chosen that all the roots of the characteristic equation have nonzero negative real parts. If the order of the differential equation is the same as the degree of the input function, then under the steady-state condition the input and its derivatives can he obtained from the output and its derivatives which are readily available from the analog setup simulating the differential equation. From this a delayed or an advanced function can he generated by using Maclaurin's series expansion. The transient period of the scheme can be adjusted by a proper choice of the coefficients of the differential equation.
TL;DR: In this paper, the far field intensities due to a conical horn excited in its dominant mode have been calculated in closed form from an acoustical analogue and with the aid of Smythe's vector diffraction theory.
Abstract: The far field intensities due to a conical horn excited in its dominant mode have been calculated in closed form from an acoustical analogue and with the aid of Smythe's vector diffraction theory. The theoretical results have been compared with experimental observations with fair agreement between the two for flare (semi-vertical angle of cones) angles up to 35°.
Abstract: We present here the eigenfunction expansions of the bi-harmonic Love strain function for a cylinder whose plane faces are stress-free. The convergence for the expansions of arbitrary functions in terms of these eigenfunctions is studied. As an example, the symmetrical deformations in a cylinder whose plane faces are stress-free and on whose curved edge arbitrary radial displacement and transverse shear force are prescribed is worked out.
TL;DR: In this paper, an analysis of the absorbed r.f. wave in the plasma in the region of anomalous dispersion is carried out, where the peak of noise spectrum lies in the far infra-red region of the spectrum of electromagnetic waves.
Abstract: In previous papers (Bhagavat and Nandedkar 1968a, b,c,d,e, Nandedkar and Bhagavat 1969) the investigations of the damped oscillations, r.f. energy transport, backward waves and absorption of a r.f. wave in a plasma in the region of anomalous dispersion were made. In the present paper an analysis of the absorbed r.f. wave in the plasma in the region of anomalous dispersion is carried out. The absorbed r.f. wave exhibits itself as noise. The peak of noise spectrum lies in the far infra-red region of the spectrum of electromagnetic waves