Showing papers by "Birla Institute of Technology and Science published in 1977"
TL;DR: In this article, a theoretical analysis of fracture-induced magnetic effect in low carbon iron specimens is presented, showing that the surface thin layer of the specimen at the instant of fracture behaves as a magnetic thin film with a Neel wall configuration through which the fracture occurs.
36 citations
TL;DR: The expression for the circumradius of a cyclic quadrilateral in terms of its sides was known in India to Parameśvara (circa 1430).
18 citations
6 citations
5 citations
TL;DR: The plumular apex resembles that of some primitive gymnosperms and exhibits 1—3 tunica layers covering a corpus of mother cells, flanking and pith rib meristem zones.
2 citations
01 Jun 1977
TL;DR: In this article, the transient behavior of a transistor employing limited saturation device (LSD) technique has been analyzed and compared with the corresponding experimental observations using epitaxial planar transistors and good agreement has been obtained.
Abstract: Charge control analysis the transient behaviour of a transistor employing limited saturation device (LSD) technique has been presented. The calculated transient response has been compared with the corresponding experimental observations using epitaxial planar transistors and good agreement has been obtained.
2 citations
TL;DR: In this paper, the S-waveS-matrix for a local potential constructed by Stillinger and Herrick and a separable non-local potential constructed using the von Neumann and Wigner procedure was studied.
Abstract: The behaviour ofS-matrix for potentials generating bound states in continuum in the neighbourhood of the positive bound state energies is studied. It is shown that unlike the case of usual negative energy bound states, theS-matrix does not have a pole at the positive bound state energy but becomes unity at the energy corresponding to bound states in continuum. Calculations ofS-waveS-matrix for a local potential constructed by Stillinger and Herrick and a separable nonlocal potential constructed by the present authors verify these results. Our results indicate that the bound states embedded in continuum constructedvia the von Neumann and Wigner procedure cannot be interpreted as resonances with zero width.
2 citations
TL;DR: In this article, the effect of carrier temperature on the transverse phonon-helicon interaction in piezoelectric semiconductors was studied and it was found that the gain increases with the frequency for all values of the drifting electric field at both 290°K and 77°K whereas for right-hand polarized wave (RHPW) it shows the mixed character.
Abstract: The effect of carrier temperature on the transverse phonon-helicon interaction in piezoelectric semiconductors is studied. It is found that for left-hand polarized wave (LHPW) the gain increases with the frequency for all values of the drifting electric field at both 290°K and 77°K whereas for right-hand polarized wave (RHPW) it shows the mixed character. It is also found that the gain increases for both RHPW and LHPW with the drift velocity at 77°K for all values of the magnetic field.
1 citations
TL;DR: In this paper, a charge control analysis of turn off switching behavior of a saturation-controlled transistor circuit has been presented, and the analytical results compare very well with the experimental result.
Abstract: Charge control analysis of turn off switching behaviour of a saturation-controlled transistor circuit has been presented. The analytical results compare very well with the experimental result.
01 Oct 1977
TL;DR: In this article, the authors give some results concerning the following problem: given a linear bounded operator A which is subnormal on a Hilbert space H, and B its minimal normal extension on H, when can a quasi-normal operatorT commuting with A be extended to an operatorTe on H such thatTe commutes with B andTe is quasi normal on K?
Abstract: We give some results concerning the following problem: Given a linear bounded operatorA which is subnormal on a Hilbert spaceH, andB its minimal normal extension on a Hilbert spaceK ∼H, when can a quasi-normal operatorT commuting withA be extended to an operatorTe onK such thatTe commutes withB andTe is quasi-normal onK?
TL;DR: In this article, the excitation of solid semiconductor plasma and gaseous plasma with the two magnetic line sources (having similar and dissimilar frequencies) has been studied while magnetic field is present in the direction parallel to that of line sources.
Abstract: The excitation of solid semiconductor plasma and gaseous plasma with the two magnetic line sources (having similar and dissimilar frequencies) has been studied while magnetic field is present in the direction parallel to that of line sources. The amplitude of the radiation field has some interesting features while considering the changes in a, ν/ω, ων/ω and ω,/ω for both the plasmas. For different a values in almost all the cases, one intense peak is followed by other less intense peaks. Radiation peaks obtained for lossless plasma get their magnitudes reduced when lossy behaviour of plasmas is taken into account. The change in a affects the direction and magnitudes of radiation peaks for lossy and lossless plasmas. Considering the dissimilarity of the source frequencies, the 0° radiations (for semiconductor) attain the maximum for a particular difference in two source frequencies having less amplitude before and after the maximum radiation. The dissimilarity, in case of geseous plasma gives the oscillati...
TL;DR: In this article, the effect of axial location and diameter ratio of a disk shaped circular ring on the base pressure of a flat-based axisymmetric body at Mach number 2.067 was investigated.
Abstract: Introduction T HE drag of a rocket vehicle increases by mounting a circular ring on the body of the vehicle. The increase in drag results in reducing the range, impact velocity, and/or increasing the time of flight of the vehicle. By proper selection of the diameter and position of the ring on the body, the drag can be conveniently controlled to provide wider flexibilities in range, impact velocity and time of flight for the same vehicle as demanded by a particular application. A volume of theoretical and experimental research work on the base pressure and near-wake flow phenomenon is available. The effect of angle of attack, base mass addition, following body presence on the base flowfield structure and base pressure has also been recently reported. However, little information is available on the effect of ring mounting on an axisymmetric test body. This paper presents the experimental results of the effect of axial location and diameter ratio of a disk shaped circular ring on the base pressure of a flat-based axisymmetric body at Mach number 2.067.