Showing papers by "University of Ioannina published in 1978"
TL;DR: In this paper, the authors show that the work function, sticking coefficient and the maximum density of Cs that can be deposited on the MoS2 surface depend strongly on substrate temperature.
48 citations
01 Jan 1978
21 citations
TL;DR: In this article, the oscillatory and asymptotic behavior of all solutions of a class of n th order (n > 1) nonlinear differential equations with deviating arguments involving the so-called nth order r -derivative of the unknown function x defined by where r 1, (i = 0,1,…, n − 1) are positive continuous functions on [ t 0, ∞] was studied.
Abstract: This paper deals with the oscillatory and asymptotic behaviour of all solutions of a class of n th order ( n > 1) non-linear differential equations with deviating arguments involving the so called n th order r -derivative of the unknown function x defined by where r 1 , ( i = 0,1,…, n – 1) are positive continuous functions on [ t 0 , ∞). The results obtained extend and improve previous ones in [7 and 15] even in the usual case where r 0 = r 1 = … = r n–1 = 1.
16 citations
16 citations
14 citations
TL;DR: In this article, it was shown that oxygen forms oxide-like bonds with Cu(100), and the work function minimum min and maximum min and max of Cs on clean Cu100 was lowered and shifted to a longer time Cs deposition with pre-adsorbed oxygen.
10 citations
TL;DR: In this article, a theoretical review and a detailed phonomenological description of the "flavoring" of the bare Pomeron pole at t = 0 (i.e., the nondiffractive renormalization of its multi-peripheral unitarity sum by strange quarks, charmed quark, diquarks,...) from an ''unflavored'' intercept alpha-circumflex = 0.85 to a ''flavored" intercept..cap alpha.. approx. = 1.08.
Abstract: We present a theoretical review and a detailed phonomenological description of the ''flavoring'' of the bare Pomeron pole at t = 0 (i.e., the nondiffractive renormalization of its multiperipheral unitarity sum by strange quarks, charmed quarks, diquarks,...) from an ''unflavored'' intercept alpha-circumflex = 0.85 to a ''flavored'' intercept ..cap alpha.. approx. = 1.08. Experimentally, flavoring effects seem to converge rapidly; hence this number is probably close to the bare intercept of the Reggeon field theory. We treat NN, ..pi..N, and KN total cross sections and real to imaginary amplitude ratios. We do not observe oscillations. We pay particular attention to 2sigma/sub K/N - sigma/sub piN/ which rises monotonically. We present a closely related combination of inelastic diffraction cross sections which decreases monotonically, indicating that vacuum amplitudes are not simply the sum of a Pomeron pole and an ideally mixed f. In fact we argue that a Pomeron + f structure is neither compatible with flavoring nor with schemes in which flavoring is somehow absorbed away. In contrast, flavoring is required for consistency with experiment by the Chew-Rosenzweig hypothesis of the Pomeron-f identity. We close with a description of flavoring threshold effects on the Reggeon field theory at current energies.
9 citations
TL;DR: In this paper, nonlinearities observed in Thellier's plots are explained in terms of a weathering model, based on the reduction in size of the originally present iron oxide particles, due to leaching.
6 citations
01 Mar 1978
TL;DR: In this article, warm air advection in the Greek area was examined as a precipitation causing factor, and it was shown that warm air can be used as precipitation-causing factor.
Abstract: In the present paper, warm air advection in the Greek area as a precipitation causing factor, is examined.
6 citations
5 citations
TL;DR: In this article, the absorption and luminescence excitation spectra of solid benzene and benzene isolated in rare-gas matrices have been studied and the absolute absorption cross sections of various electronic band systems including the Rydberg region of C 6 H 6 are obtained using transmission spectra.
TL;DR: In this article, a solution is presented to the buckling problem of a continuous beam resting on a tensionless foundation model, which was proposed by Winkler and by Reissner.
Abstract: In this paper, a solution is presented to the buckling problem of a continuous beam resting on a tensionless foundation model that was proposed by Winkler and by Reissner.
TL;DR: In this article, the ratio of the neutral to charged current events is found to be independent of the nuclear models and sufficiently sensitive to permit discrimination among various fashionable models of neutral currents.
Abstract: Cross sections for neutrino scattering on /sup 1/4N to specific nuclear states are calculated. The ratio of the isovector neutral to charged current events is found to be independent of the nuclear models and sufficiently sensitive to permit discrimination among various fashionable models of neutral currents. Low energy neutrino elastic cross sections for p-shell nuclei are predicted to be of the order of 10/sup -/39 cm/sup 2/.
TL;DR: In this paper, the vibration of cylindrical panels with simply supported boundary conditions in the presence of an initial bending moment is investigated based on the theory of Herrmann and Armenakas, and the results for the stability and free vibration of the panels are obtained as special cases.
TL;DR: This paper derived analytical expressions for the eigenvalue bounds of matrices arising when using a fast method for separable finite difference equations for the numerical solution of the first three boundary value problems for the two-dimensional self-adjoint second order elliptic partial differential equation in a rectangle.
TL;DR: In this article, the effects of the rising total hadronic cross sections on the inelastic electroproduction at large, including photoabsorption, and diffractive photoproduction, were studied.
Abstract: In the framework of vector dominance we study the effects of the rising total hadronic cross sections on the inelastic electroproduction at large ..omega.., photoabsorption, and diffractive photoproduction. A vector-dominance formulation leading to sigma/sub L//sigma/sub T/ approx. = 0 at ..omega.. >> 1 is also discussed.
TL;DR: In this paper, a critical load analysis for conservative systems subjected to arbitrary constraints is presented, where the principle of stationary potential energy is used throughout the base state, considered in general a bending state, and the nontrivial constraints are approximated by linear theory.
Abstract: A critical load analysis for conservative systems subjected to arbitrary constraints is presented The principle of stationary potential energy is used throughout The base state, considered in general a bending state, and the nontrivial constraints are approximated by linear theory The description of an adjacent equilibrium state is then obtained from the nonlinear theory and the eigenvalue problem is formulated using an appropriate linearization procedure The method is subsequently applied to the stability problem of a cylindrical isotropic shell
TL;DR: In this paper, the authors compared three theories of bending for a beam having rectangular cross-section and showed that the values of bending stresses given by the Winkler theory are very close to Golovin's exact results.
Abstract: From the two ‘approximate’ theories of bending—Elementary Theory and Winkler available to designers for the determination of bending stresses in beams having initial curvature, the Winkler approximate solution is the one closer to the exact solution development by Golovin. Timoshenko and Goodier show a comparison of stresses resulting from the three theories for a beam having rectangular cross-section. It is shown here that the values of bending stresses given by Winkler theory are very close to Golovin's exact results. The difference between the two theories lies in the range of 0·1–3·1 % increasing with the ratio, c/a , of the outer to inner radius of curvature of the beam. The above close relationship between the two theories for a beam of rectangular cross-section is also reported by Ford.
TL;DR: In this article, the vacuum of the two-dimensional ON model at finite temperatures was studied using temperature-dependent Green's function techniques, and the semi-classical bound-state spectrum of this theory was analyzed by applying quantum statistics to the fluctuations which determine the quantum dynamics of these bound states.
Abstract: Using temperature-dependent Green’s function techniques, we study the vacuum of the two-dimensionalON model at finite temperatures. We also analyse the semi-classical bound-state spectrum of this theory at finite temperatures by applying quantum statistics to the fluctuations which determine the quantum dynamics of these bound states.