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Browsing Article by Issue Date

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  • An Existence Theorem For Optimal Control With Nonstandard Cost Functionals 
    MUKHERJEE, R.N.; PRASAD, SHIV (1987)
    An existence theorem for optimal control is obtained for a general nonstandard cost functional of fractional type in this work. As an application of our result we can derive an existence theorem for optimal control given ...
  • Evaluation of cumulative damage in glass fibre reinforced plastic by ultrasonic method 
    Srivastava, V.K.; Prakash, R. (Springer India, 1987-03)
    This paper presents the cumulative damage in glass fibre reinforced plastic composite during loading and unloading at regular intervals using the continuous monitoring of ultrasonic test instrument. The result shows that ...
  • Electrical properties of the system lanthanum lead cobalt titanium oxide 
    Kumar, D.; Prasad, Ch.D.; Parkash, O. (Springer India, 1987-06)
    Measurements of DC electrical resistivity and Seebeck coefficient on the perovskite system La1-x Pb x-δ Co1-x Ti x O3-δ for 0·2≤x≤0·9 have been made in the temperature range 300-800 K. AC conductivity, σ a.c, of all the ...
  • Undercooling studies on dispersed bismuth droplets 
    Chaubey, S.; Singh, V.; Ramachandrarao, P. (Springer India, 1987-11)
    In the zinc-bismuth system, a monotectic reaction occurs at 689 K and 0·6 at.% Bi composition. Rapid solidification of the as-cast monotectic alloy led to a micromorphology in which bismuth was uniformly and bimodally ...
  • Electrical conduction in the solid solution La1 -x Na x Co1 -x Nb x O3 (0·01 ≤x ≤ 0·99) 
    Parkash, O.M.; Kumar, D.; Kumar, R. (Springer India, 1988-05)
    Scebeek coefficient and DC resistivity of the solid solution Lal _~Na~Col _~Nb~O3 (001 ~< x <~0-99) have been measured in the temperature range 300-900 K. Seebeck coefficient is positive for all compositionsover the ...
  • Fatigue life of E-glass fibre/zirconia/epoxy hybrid composites 
    Srivastava, V.K. (Springer India, 1988-05)
    An ultrasonic technique has been used to evaluate the degradated fatigue life of glass fibre/zirconia hybrid composites in different concentrations of sodium chloride and sulphuric acid. Results indicate that reduction in ...
  • Electrical conduction in the solid solution La1 -x Na x Co1 -x Nb x O3 (0·01 ≤x ≤ 0·99) 
    Parkash, O.M.; Kumar, D.; Kumar, R. (Springer India, 1988-05)
    Seebeck coefficient and DC resistivity of the solid solution La1 -x Na x Co1 -x Nb x O3 (0·01 ≤x ≤ 0·99) have been measured in the temperature range 300-900 K. Seebeck coefficient is positive for all compositions over the ...
  • Electrical conduction in the solid solution La1 -x Na x Co1 -x Nb x O3 (0·01 ≤x ≤ 0·99) 
    Parkash, O.M.; Kumar, D.; Kumar, R. (Springer India, 1988-05)
    Seebeck coefficient and DC resistivity of the solid solution La1 -x Na x Co1 -x Nb x O3 (0·01 ≤x ≤ 0·99) have been measured in the temperature range 300-900 K. Seebeck coefficient is positive for all compositions over the ...
  • Preparation and characterization of Ca1 -x La x Ti1 -x Co x O3 (0·00 
    Parkash, O.M.; Durga Prasad, Ch.; Kumar, D. (Springer India, 1988-09)
    The possibility of the formation of solid solution in the system Ca1 -x La x Ti1 -x Co x O3 for x≤0·5 has been investigated. X-ray diffraction studies show that compositions with x=0·05, 0·1, 0·2, 0·3 and 0·5 prepared by ...
  • Preparation and characterization of Ca1 -x La x Ti1 -x Co x O3 (0·00 
    Parkash, O.M.; Durga Prasad, Ch.; Kumar, D. (Springer India, 1988-09)
    The possibility of the formation of solid solution in the system Ca1 -x La x Ti1 -x Co x O3 for x≤0·5 has been investigated. X-ray diffraction studies show that compositions with x=0·05, 0·1, 0·2, 0·3 and 0·5 prepared by ...
  • Dielectric properties of the system Ca1 -x La x Ti1 -x Co x O3 
    Durga Prasad, C.; Tewari, H.S.; Kumar, D.; Parkash, O. (Springer India, 1988-12)
    Dielectric behaviour of samples of the system Ca1 -x La x Ti1 -x Co x O3 with x ≤ 0·20 has been studied in the temperature range 300-525 K as a function of frequency. The strong dispersion of e{open} and D observed in these ...
  • Studies on the spin-state equilibria of cobalt ions in the system La1-x Na x Co1-x Nb x O3 (x≤0·40) 
    Parkash, O.; Chaturvedi, N.; Tiwari, M.; Kumar, D. (Springer India, 1989-03)
    The spin-state equilibria of cobalt ions in the system La1-x Na x Co1-x Nb x O3 (x≤0·40) has been studied by measuring its magnetic susceptibility as a function of temperature in the range 300-600 K. It is found that the ...
  • Generation of low-frequency oscillations in the subsolar venus ionopause 
    Singh, R.N.; Upadhyay, H.O. (Springer India, 1989-10)
    The steep electron density gradient, the magnetic field curvature and the effect of gravity make the Venus ionopause region unstable. The onset of flute instability in the Venus ionopause plasma has been studied. The ...
  • Bainite Structures in 0.2C-3.6M Steel 
    Joarder, A.; Sarma, D.S. (1991)
    The microstructures of a 0.2C-3.6Ni steel are studied after isothermal transformation over a temperature range of 600–400°C after different times up to 10 ks at each temperature. It was observed that the transformation at ...
  • On the p-norm of the truncated n-dimensional Hilbert transform 
    Pandey, J.N.; Singh, O.P. (1991-04)
    It is shown that a bounded linear operator T from L�(Rn) to itself which commutes both with translations and dilatations is a finite linear combination of Hilbert-type transforms. Using this we show that the ρ-norm of the ...
  • Slip processing of high T c superconductors 
    Sinha, R.K.; Sinha, R.K. (Springer India, 1991-08)
    Slip-processing technique has been used to fabricate tapes and alumina-supported films of superconducting YBa2Cu3O7-x . Good densification and connectivity are revealed by scanning electron microscopy. Both the tape and ...
  • Generalized convex duality for multiobjective fractional programs 
    Mukherjee, R.N. (1991-12)
    Egudo derived some duality theorems for Multi-objective programs using the concept of efficiency coupled with some generalized convexity assumptions on the objective and constraint functions. The main results of the present ...
  • Microstructure and wear characteristics of an Al-4Cu-20Pb alloy produced by spray deposition 
    Ojha, S.N.; Pandey, O.P.; Kumar, M.; Ramachandra, C.; Tripathi, B. (1992)
    Al–4Cu–20Pb alloy was spray deposited at a gas pressure of 1.4 MPa and melt flow rate of 1.6 kg min−1. The microstructure of the preform exhibited equiaxed morphology with grain size varying from 20–25 μm. Uniform distribution ...
  • Effect of Reduction Rate on the Swelling Behaviour of Iron Ore Pellets 
    Sharma, T.; Gupta, R.C.; Prakash, B. (1992)
    In the present investigation an attempt has been made to determine the effect of reduction rate on the swelling behaviour of iron ore pellets. For this purpose two Indian iron ore fines from Bailadila and Noamundi deposits ...
  • Microstructure of Stircast Al—Pb Metal-Metal Composites 
    Mohan, S.; Agarwala, V.; Ray, S. (1992)
    Stircast Al-Pb Metal-Metal composites have been produced at a high rotational speed of 53 s-1 with different lead contents and with the same lead content but different rotational speeds of 53, 37 and 25 s-1 in a stircasting ...

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