Showing papers by "Utsunomiya University published in 1977"
TL;DR: In this article, the rate determining step of the reaction was (C3H8)a → (C 3H6)a + (H2)a, and the rates were obtained from the initial slope of the pressure-time curves.
26 citations
TL;DR: In this article, a good qualitative agreement between theory and experiment is found for two non-totally symmetric vibrations which are taken into account in the theoretical calculation for the Jahn-Teller coupled vibrations in croconate ion, both experimentally and theoretically.
22 citations
TL;DR: In this paper, the transfer of isotopic species is superposed on a heterogeneous catalytic reaction conducted under steady-state conditions, and an efficient method of modeling the system of first-order differential equations describing tracer transfer is presented.
14 citations
TL;DR: In this paper, the reduction factors p and q for the ground state and the excitation energy of the first excited vibronic state were calculated for an electronic doublet coupled with two vibrational modes as functions of the Jahn-Teller coupling strength and the mode frequencies.
10 citations
TL;DR: The ideal composition of fibers for insulating paper has been clarified by investigating the influence of the shape of fines on dielectric and tensile breakdown of oil-impregnated Kraft paper for oil filled (OF) cable at 105N/M oil.
Abstract: The ideal composition of fibers for insulating paper has been clarified by investigating the influence of the shape of fines on dielectric and tensile breakdown of oil-impregnated Kraft paper for oil filled (OF) cable at 105N/M oil. Furthermore, the pulp refining methods for producing such insulating paper have been investigated.
10 citations
TL;DR: In this paper, the electrostatic ion stoppering in a magnetic mirror field was demonstrated experimentally in rather high plasma density (10−10−1 cm -3 ). But the ion loss from the mirror throat expressed by a loss factor δ, was reduced to about one quarter of the initial value.
Abstract: The electrostatic ion stoppering in a magnetic mirror field is demonstrated experimentally in rather high plasma density (\(10^{10}{<}n_{0}{\lesssim}10^{13}\) cm -3 ). The ion loss from the mirror throat expressed by a loss factor δ, is reduced to about one quarter of the initial value. It is discussed as a confinement mechanism of ions that particles are reflected back adiabatically by the electrostatic field at the mirror throats of the magnetic field.
7 citations
TL;DR: In this paper, a generalization of the Fourier transform method to the nonlinear evolution equation is proposed and applied to the Burgers equation and the vector equation studied by Ablowitz and others.
Abstract: Inverse scattering method is investigated for a general class of evolution equations. A decisive role is played by a transformation operator from the solution of the evolution equation to the eigenfunction for an operator with eigenvalues constant in time. Classes of the evolution equations with the same spectrum problem are presented and a generalization of the Fourier transform method to the nonlinear equation is suggested. The theory is applied to the several evolution equations including the Burgers equation and the vector equation studied by Ablowitz and others. The initial value problem for certain classes of nonlinear evolution equation has been studied by means of the inverse scattering method.D~n In this method, we determine, for a given class of nonlinear equations, the linear operator which depends on the solution of the original equation and, hence, evolves in. time but has invariant spectrum. 2>.B> Thus the time development of the solution of the origi nal equation is transferred fully to that of the set of eigenfunctions for linear operator. Since the sets of eigenfunctions determine scattering data in the termino logy of quantum mechanics, we are led to the method, where the evolution of the scattering data determines that of the original nonlinear equation. In the present paper we study some classes of the evolution equation and examine the explicit relation between the linear operator for the spectral problem and the evolution equation and also the connection between the solution and the eigenfunctions. As far as the examples known at present are concerned, the evolu tion of the eigenfunction is governed by a linear equation. Hence we make a natural proposition that the evolution of the eigenfunctions is the one of the infinitesimal disturbance supposedly taking place in the medium governed by the associated evolution equation. Thus, we assume that the time evolution of the eigenfunction is determined by the Frechet derivative of the evolution equation. In § 2, we consider an evolution equation ut+G[u] =0.,
6 citations
6 citations
TL;DR: In this paper, a method for varying the electron temperature of a target-plasma in a double plasma device from 0.05 to 1.3 eV by adjusting the thermionic emission of electrons from filaments used in the region is described.
Abstract: A method is described for varying the electron temperature of a plasma (target-plasma) in a double plasma device from 0.05 to 1.3 eV by adjusting the thermionic emission of electrons from filaments used in the region.
5 citations
4 citations
TL;DR: In this article, a self-driven reaction wave is generated in a D-T sphere by a factor of 103 to 104 above its solid density, and the center of the compressed fuel is brought to an ignition temperature, while the rest of the fuel remains relatively cold.
Abstract: Thermonuclear reaction waves in plasmas have recently attracted considerable attentions in connection with the laser-induced thermonuclear fusion. In a highly compressed laser plasma, the burning process may develop as follows1: The inner region of a D-T sphere is compressed adabatically by a factor 103 to 104 above its solid density, and the center of the compressed fuel is brought to an ignition temperature, while the rest of the fuel remains relatively cold. Then, the enrgy produced in the ignited and burning central region of the fuel can heat the surrounding cold fuel sufficiently for ignition to occur. This process leads to the formation of a self-driven reaction wave which can propagate radially outwards igniting the cold fuel.