Showing papers by "University of Electro-Communications published in 1982"
TL;DR: A critical analysis was made on the relationship between the energy release rate G and the stress intensity factors for non-coplaner crack extension under combined Mode I, II and III loading as discussed by the authors.
Abstract: A critical analysis was made on the relationship between the energy release rate G and the stress intensity factors for non-coplaner crack extension under combined Mode I, II and III loading. Developing a method different from the application of Bueckner's equation, the equation of G was derived as % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGak0Jf9crFfpeea0xh9v8qiW7rqqrFfpeea0xe9Lq-Jc9% vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x% fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4raiabg2% da9iaacUfacaGGOaGaeuOUdSMaey4kaSIaaGymaiaacMcacaGGVaGa% aGioaiabfY7aTjaac2facaGGOaGabm4sayaaiaWaa0baaSqaaiaabM% eacaWGIbaabaGaaGOmaaaakiabgUcaRiqadUeagaacamaaDaaaleaa% caqGjbGaaeysaiaadkgaaeaacaaIYaaaaOGaaiykaiabgUcaRiaacI% cacaaIXaGaai4laiaaikdacqqH8oqBcaGGPaGaey4kaSIabm4sayaa% iaWaa0baaSqaaiaabMeacaqGjbGaaeysaiaadkgaaeaacaaIYaaaaa% aa!5988!\[G = [(\kappa + 1)/8\mu ](\tilde K_{{\text{I}}b}^2 + \tilde K_{{\text{II}}b}^2 ) + (1/2\mu ) + \tilde K_{{\text{III}}b}^2 \], where % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGak0dh9WrFfpC0xh9vqqj-hEeeu0xXdbba9frFj0-OqFf% ea0dXdd9vqaq-JfrVkFHe9pgea0dXdar-Jb9hs0dXdbPYxe9vr0-vr% 0-vqpWqaaeaabaGaciaacaqabeaadaqaaqaaaOqaaGqaciqa-Teaga% acamaaBaaaleaaieaacaGFjbGaa4NyaaqabaGccaqGGaGab83sayaa% iaWaaSbaaSqaaiaa+LeacaGFjbGaa4NyaiaabccaaeqaaKaaajaa+f% gacaGFUbGaa4hzaOGaa4hiaiqa-TeagaacamaaBaaaleaacaGFjbGa% a4xsaiaa+LeacaGFIbGaaeiiaaqabaaaaa!477C!\[\tilde K_{Ib} {\text{ }}\tilde K_{IIb{\text{ }}} and \tilde K_{IIIb{\text{ }}} \] are the stress intensity factors at the tip of an infinitesimal kink as formed by non-coplaner crack extension. Among the three existing equations of G which are mutually contradictory, Nuismer's equation and Wang's equation disagree with the present result. In the case where Mode III loading is not involved, Hussain et al's equation agrees with the present result, although their analysis seems to contain questionable points.
50 citations
TL;DR: In this article, the lineshape of the ν 1 Raman band of methane was measured as a function of pressure between 1 and 50 atm by inverse Raman spectroscopy using the 488 nm output of a cw Ar + laser as a probe beam and the output of pulsed dye laser as Stokes pump beam.
46 citations
TL;DR: It is shown that the often used dynamic dispatching pohcy is optimal within the framework of this multiprogramming model, and the range within which these properties hold is discussed, and some examples are given.
Abstract: finite-source queuing model (sometimes called the finite-population, machine-interference, or machine-repairman model), which has often been used in analyzing time-sharing systems and multi- programmed computer systems, is invesugated. The model studied here has two service staUons, a processor (single server) and peripherals (infinite server), and a finite number of customers (or jobs) that have a distract service rate at the processor. The model is in eqmhbnum. It is shown that the utilization factor of the processor can be obtained in an analyuc form and ts independent of various scheduling disciphnes employed at the processor, such as FCFS, generahzed processor sharing, preempUve (resume) and nonpreemptwe priority disciphnes, under some condiaon. Other relevant propemes of this model are also shown. The range within which these properties hold is discussed, and some examples are given. Examples of appficatlon to multiprogrammmg and tune-sharing systems are given; in particular, It Is shown that the often used dynamic dispatching pohcy (which gwes the higher preempuve priority to the more I/O oriented job) is optimal within the framework of this multiprogramming model. Categories and SubJect Descriptors:
45 citations
TL;DR: In this paper, the IR absorption of SiC layers formed by the implantation of carbon ions into silicon was calculated as a function of the dose between 2 × 1017 and 2× 1018 cm−2 at 100 keV, of the annealing temperature up to 1200°C and of the substrate temperature during implantation up to 600°C.
45 citations
TL;DR: A technique is developed for determining space complexity in on-line computation and it is shown that each of the following functions requires linear space.
36 citations
TL;DR: In this paper, the authors investigated the crystallization of amorphous antimony (a-Sb) films deposited onto glass substrates in an ultrahigh vacuum of 10−6−10−7 Pa through in situ observation with an optical microscope camera.
27 citations
TL;DR: In this paper, the first band system of the u.v. spectrum was assigned to the ψ4â†�ψ3(B2) transition, which was supported by a comparison of the ionization potentials and transition energies of five-membered heterocycles.
Abstract: High resolution and temperature dependence measurements have been recorded for the lowest energy u.v transition of thiophen. Based on the new observations of the hot bands the vibronic fine structure has been reassigned. The new assignment can be fitted well to the spectra of deuteriated derivatives. The first band system of the u.v. spectrum is assigned to the ψ4â†�ψ3(B2) transition. This conclusion is supported by a comparison of the ionization potentials and transition energies of some five-membered heterocycles.
22 citations
TL;DR: In this paper, the crystallization process in amorphous antimony films was observed through an optical microscope, and it was shown that the crystallisation can only be observed on silver films thinner than 30−40 A which have previously been exposed to oxygen or nitrogen gas.
18 citations
TL;DR: In this paper, the conduction electron spin resonance (CESR) of the graphite-potassium intercalation compounds, C8 K and C24 K, was studied in hydrogen gas.
17 citations
TL;DR: In this article, the Dirac-Fock SCF theory for the generalized average energy of configurations is formulated and a practical method for solving the SCF equations in the framework of the basis set expansion method is presented.
Abstract: Dirac-Fock SCF theory for the generalized average energy of configurations is formulated. Practical method for solving the SCF equations in the framework of the basis-set expansion method is presented. Calculations have yielded accurate energies of the L S averaged ground-state configurations of neutral atoms from He to Ne.
15 citations
TL;DR: A new direct algorithm is presented for checking equivalence of some classes of deterministic pushdown automata (dpda's), after Korenjak and Hopcroft's branching algorithm, which is powerful enough to be applicable to two dpda's accepting by empty stack, but also simple even for d pda's in lower subclasses.
Abstract: A new direct algorithm is presented for checking equivalence of some classes of deterministic pushdown automata (dpda's), after Korenjak and Hopcroft's branching algorithm. It is not only powerful enough to be applicable to two dpda's accepting by empty stack, one of which is real-time, but also simple even for dpda's in lower subclasses. This is the first time the branching algorithm has been used to give such a general decision procedure without ever “mixing” the two languages in question. In other words, it deals with only the equivalence equation whose left-hand side consists of a pure reachable configuration of one dpda and whose right-hand side that of the other.
TL;DR: In this article, the rotational constants and vibrational frequencies of the triplet state of the line spectrum between the ground state and the triplets state were determined by laser-induced fluorescence of a molecular beam.
Abstract: The line spectrum between the triplet state $a^{3}\ensuremath{\Pi}_{u}$ and the ground state $X^{1}\ensuremath{\Sigma}_{g}^{+}$ of ${\mathrm{Na}}_{2}$ is observed by the laser-induced fluorescence of a ${\mathrm{Na}}_{2}$ molecular beam. The rotational constants and vibrational frequencies of the $a^{3}\ensuremath{\Pi}_{u}$ state are determined.
TL;DR: In this article, the coupling of the iron ion with the intramolecular distortions and the intermoleculer coupling between the molecular distortions are taken into account for spin state changes in iron compounds.
Abstract: The cooperative Fe(II)\(\rightleftarrows\)Fe(III) transitions including spin state changes in iron compounds are studied on the basis of the ligand field theory by using the model in which the coupling of the iron ion with the intramolecular distortions and the intermoleculer coupling between the molecular distortions are taken into account. The various types of thermally induced transitions between the Fe(II) high-spin 5 T 2g , the Fe(II) low-spin 1 Al 1g , the Fe(III) high-spin 6 A 1g , and the Fe(III) low-spin 2 T 2g states are possible depending on both the relative energy position of these states in the undistorted phase and the coupling strength.
TL;DR: The authors introduce the concept of fuzzy-set into fault-tree-analysis and study the fuzziness of human-reliability through experiments especially when the information is redundant and also when the workers are redundant.
TL;DR: The bound of the asymptotic distribution of AMU estimators is given in this paper, where it is shown that the AMU distributions of two-sided estimators are at least close to each other.
Abstract: The bound of the asymptotic distributions of
$$n\left| {\hat \theta _n - \theta } \right|$$
for all asymptotically median unbiased (AMU) estimators
$$\hat \theta _n $$
is given in non-regular cases. It provides us with a powerful criterion for an AMU estimator to be two-sided asymptotically efficient and also useful in the cases when there may not exist a two-sided asymptotically efficient estimator since we may find an AMU estimator whose asymptotic distribution attains at least at a point, or an AMU estimator whose asymptotic distribution is uniformly “close” to it. Some examples are given.
TL;DR: The application of face pattern as a medium to illustrate to man complex computer-processed medical diagnosis and a separate application of the method was performed to indicate a possible effect of corticosteroid on idiopathic nephrotic syndrome.
TL;DR: In this article, the lateral contours of the tongue of a male speaker of English were analyzed by computing the best fit of a general quadratic curve to the contour, the tongue is described by the five parameters of the curve, namely, the horizontal and vertical positions, radius of curvature at the vertex, eccentricity, and angle of backward lean of the axis of curve.
TL;DR: In this article, two magnetic first-order transitions have been found for ζMn 26,Ge using a single crystal, one at T t 1 =120 K and the other at T 2 =310 K in a magnetic field of 10 kOe.
Abstract: From the magnetization measurement on single crystal, two magnetic first-order transitions have been found for ζMn 26 ,Ge The one is at T t1 =120 K and the other at T t2 =310 K in a magnetic field of 10 kOe, both associated with abrupt increase in the magnetization The easy axis of magnetization is perpendicular to the trigonal symmetry axis in a range of temperature above T t1 , and parallel at temperatures above T t2 The entropy changes at these transitions have been estimated from the dependence of the transition temperature on magnetic field to be Δ S 1 =68{ t i m e s }10 3 erg/K g and Δ S 2 =20×10 3 erg/K g
TL;DR: Strong fluorescence with high directionality was observed for the first time to the authors' knowledge from the mercury atomic transition 7(3)S(1)-6( 3)P(0) at 404.7 nm by the photodissociation of HgBr(2).
Abstract: Strong fluorescence with high directionality was observed for the first time to our knowledge from the mercury atomic transition 7(3)S(1)-6(3)P(0) at 404.7 nm by the photodissociation of HgBr(2). Superfluorescence could be obtained only in a limited temperature region (130-160 degrees C) when HgBr(2) was excited by an ArF (193-nm) laser above a certain threshold power. Mechanisms for the formation of the excited mercury atom and for the quenching of the lower metastable state 6(3)P(0) are briefly discussed.
TL;DR: In this article, the authors give theoretical justification of several types of finite element approximations to the initial-boundary value problems of first order linear hyperbolic equations, including the piecewise linear continuous finite element method for space variable, x, and the Euler type step by step integration method for time variable, t. The convergence and the error estimate of the approximate solutions to the true one are discussed.
Abstract: The aim of this work is to give theoretical justification of several types of finite element approximations to the initial-boundary value problems of first order linear hyperbolic equations. Our approximate scheme is obtained by the piecewise linear continuous finite element method for space variable, x, and the Euler type step by step integration method for time variable, t. An artificial viscosity technique, up-stream type methods are considered within the frame work of L2-theory. The convergence and the error estimate of the approximate solutions to the true one are discussed.
TL;DR: In this article, the transition from conduction carriers to localized spin centers in pyrographite was studied in detail by high energy ton bombardments, and it was shown that spin centers can be interpreted as conduction-carriers in a sample containing a large amount of acceptors produced by the bombardment.
Abstract: In pyro-graphite bombarded with high energy chlorine ions, two kinds of paramagnetic centers are observed by ESR. These centers are interpreted as conduction carriers in a sample containing a large amount of acceptors produced by the bombardment and localized spin centers in an amorphous state. It is proposed that the transition from conduction carriers to localized spin centers will be studied in detail by high energy ton bombardments.
01 Jan 1982
TL;DR: X-ray photoelectron spectroscopy has been applied to the fluoro-phenyl retinal and its bacteriorhodopsin analogue and the experimental results suggest that there is no external point charge near the β-ionone ring of the retinal molecule in the bacteriorodopsin.
Abstract: X-ray photoelectron spectroscopy (XPS) has been first applied to the fluoro-phenyl retinal and its bacteriorhodopsin analogue in order to study the chemical environments of chromophore in the bacteriorhodopsin. The experimental results suggest that there is no external point charge near the β-ionone ring of the retinal molecule in the bacteriorhodopsin.
TL;DR: In this paper, the operation of a bubble-domain straight-line propagation circuit has been simulated successfully by approximating the motion of an s = 0 frozen-azimuth bubble placed under a drive field.
Abstract: The operation of a bubble-domain straight-line propagation circuit has been simulated successfully. This simulation has been achieved by our approximating the motion of an s = 0 frozen-azimuth bubble placed under a drive field H_{Z}(X, Y, T)= -H_{p} \cdot \cos [2\pi(X/R_{X} - n(T)/4)] \cdot \exp [-(Y/R_{Y})^{2}] . The simulation has been generated from a previously developed numerical scheme to simulate the motion of a bubble, whose domain shape and magnetization structure along its domain wall were variable. The drive field has been modeled after a dual conductor-sheet, current-access propagation structure, which has a bit period R X and a transverse width on the order of 2R_{Y} . The entire field contour has been advanced stepwise in the positive X direction by an increase of the integer n(T) , which represents the drive-phase number. The bubble motion has been observed during the first six drive phases to produce operating margin diagrams for drive frequencies of 250 KHz, 796 KHz and 1 MHz. The method of calculation and the results of the simulation are given.
TL;DR: The line positions and intensities of the ESR from Eu 2+ ions in SrF 2 crystals have been investigated at room temperature and at 9.5 GHz as discussed by the authors.
Abstract: The line positions and intensities of the ESR from Eu 2+ ions in SrF 2 crystals have been investigated at room temperature and at 9.5 GHz. A perturbation calculation gives satisfactory results in their angular dependences when cross terms between the cubic crystal field ( b 4 /60)·( O 0 4 +5 O 4 4 ) and the hyperfine terms A i S · I i are taken into account. The relative sign of b 4 and A i can be determined from the angular dependence of the doublet separations in the forbidden transitions.
TL;DR: In this paper, the diagonal and the off-diagonal hypervirial relations and the sufficient conditions for these relations have been performed for the one-dimensional box potential and the harmonic oscillator models.
Abstract: The calculations by the diagonal and the off-diagonal hypervirial relations and by the sufficient conditions for these relations have been performed for the one-dimensional box potential and the harmonic oscillator models. In the case of the box potential model, the variation method gave the unsymmetrical wave functions for trial functions though it gave the best energies, but some of these hypervirial calculations gave the symmetrical functions and therefore they showed the exact expectation values of x, though they did not give the best energies. On the contrary, in the case of the harmonic oscillator model such a discrepancy for wave function and excitation energy did not happen. For the box potential model the expectation values of some operators were evaluated and compared with the results by the exact solution and the variation method. A weakness of the off-diagonal hypervirial calculation was pointed out and the removal of this weakness was tried. The effectiveness of these calculations were investigated.
TL;DR: In this paper, X-ray photoelectron spectra were measured for the valence bands of 13- cis and all- trans fluorophenyl-retinals and the experimental results were interpreted using the CNDO/S molecular orbital methods.
Abstract: X-ray photoelectron spectra were measured for the valence bands of 13- cis and all- trans fluorophenyl-retinals. A remarkable difference has been observed in the O 2 s -derived portion of the valence band between the two forms. The experimental results were interpreted using the CNDO/S molecular orbital methods.
01 Jan 1982
TL;DR: Negative Ions produced by electron impact in water vapor have been studied extensively as mentioned in this paper, and the primary ions are the H- and O- formed by the dissociative attachment processes.
Abstract: Negative Ions produced by electron impact in water vapor have been studied extensively. The primary ions are the H- and O- formed by the dissociative attachment processes:
(1)
(2)