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Thermoelectric power of two-dimensional electron gas in heterojunctions at low temperatures (1987)

Kundu, S. ; Sarkar, C. K. ; Basu, P. K.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 61 (1987), S. 5080-5083

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: The low-temperature thermopower of two-dimensional electron gas has been calculated by using the expression obtained from the Boltzmann equation. The relevant scattering mechanisms are taken into account. It is found that the calculated thermopower increases almost linearly with temperature in the GaAs-AlGaAs and InGaAs-InP structures, but in all cases the results differ widely from the values given by the Mott formula and also from the experimental values. The results are not influenced by phonon scattering and are slightly affected if the impurity density is changed by the order of magnitude. For high-mobility samples, the experimental values are higher than the theoretical ones and it seems that phonon drag thermopower may account for the difference. For low-mobility samples, however, the experimental values are lower and in some cases decrease with temperature. The present model is then inadequate. Possible refinements of the theory are suggested.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.338332

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Digitale Medien

Deadlock free buffer allocation in closed queueing networks (1989)

Kundu, S. ; Akyildiz, I. F.

Springer

Queueing systems 4 (1989), S. 47-56

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ISSN: 1572-9443

Schlagwort(e): Performance evaluation ; queueing networks ; finite buffers ; blocking ; deadlock

Quelle: Springer Online Journal Archives 1860-2000

Thema: Informatik

Notizen: Abstract Blocking queueing networks are of much interest in performance analysis due to their realistic modeling capability. One important feature of such networks is that they may have deadlocks which can occur if the node capacities are not sufficiently large. A necessary and sufficient condition for the node capacities is presented such that the network is deadlock free. An algorithm is given for buffer allocation in blocking queueing networks such that no deadlocks will occur assuming that the network has the special structure called cacti-graph. Additional algorithm which takes linear time in the number of nodes, is presented to find cycles in cacti networks.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01150855

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Infrared spectra of acrylonitrile grafted jute fibers (1989)

Kundu, S. K. ; Ray, P. K. ; Day, A. ; [weitere]

New York, NY [u.a.] : Wiley-Blackwell

Journal of Applied Polymer Science 38 (1989), S. 1951-1955

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ISSN: 0021-8995

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/app.1989.070381016

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