Comments on “Rigorous bounds on the radiative interaction between real gases and scattering particles” by D. G. Goodwin and J. L. Ebert

Claims are made by Goodwin and Ebert that the work by Skocypec and Buckius¹ is “erroneous.” This claim is shown to be inappropriate and incorrect. The analytical technique, exact results and charted solutions as presented in Ref. [1] are correct and the claims by Goodwin and Ebert² are not legitimate. The form of the presentation of the charted solutions in Ref. [1]is misleading and results are presented in this paper to interpret these charted solutions more fairly. These results predict the interaction of gaseous emission with scattering and the bounds are in qualitative agreement with that obtained by standard spectral analysis. The spectral analysis presented in Ref. [2]has been available in the literature for some time. To be able to predict radiative heat transfer in a real gas and scattering medium (not only predict the maximum interaction), detailed real gas and scattering analyses as presented in Ref. [1] are required since total real gas effects are accurately modeled.     

A.A. Ovchinnikov’s works on nonlinear dynamics and augmentations

This work is a tribute to fond memories of Aleksandr Anatol’evich Ovchinnikov, which touches upon only one of his multifaceted scientific activities, the dynamics of nonlinear systems, more specifically, its practical applications to the vibrational spectroscopy of polyatomic molecules and molecular crystals. A.A. Ovchinnikov was the first to predict and explain a number of peculiarities in the positions and intensity of lines in IR spectra. It was demonstrated that these peculiarities are associated with a substantial nonequilibrium in the population of vibrationally excited states: because of the nonlinearity of the interaction of atoms, the dynamic behavior of such systems may results in the localization of energy on certain vibrational modes. A.A. Ovchinnikov analyzed in detail possible cases and made predictions, which were confirmed experimentally 20 years later. Results of our recent studies are also briefly outlined, studies that cannot be considered a direct continuation of A.A. Ovchinnikov’s work, but which are nevertheless influenced by his ideas and by the results of our joint works.     

Quantum tunneling and the activated chemisorption of methane on tungsten: Comment on ‘activated chemisorption of methane and tunneling’ by T.-C. Lo and G. Ehrlich

Results of recent experimental studies on the dissociative chemisorption of CH₄ and CD₄ on W(211) were previously concluded to be inconsistent with earlier proposed quantum tunneling models. In this Letter we re-analyze the experimental results and show them to be entirely consistent with a tunneling mechanism. We also show that the reported inconsistency arises from the use of an oversimplified model for the tunneling transmission coefficient.     

Remarks on a recent article of Ch. Obcemea and E. Brändas on the theory of subdynamics

In a recent paper on the theory of subdynamics, Ch. Obcemea and E. Brändas (Ann. Phys (N.Y.)151 (1983), 383–430) claimed to correct a recently published result (M. Courbage, J. Math. Phys.23 (1982), 646, 652). It is shown that this criticism is unfounded. Some additional remarks are made.     

Comment on “The growth of Fe overlayers on Ag(100)” by G.C. Smith,H.A. Padmore and C. Norris

Smith, Padmore and Norris have claimed that the first three monolayers of Fe grown at room temperature on Ag(100) form a strained fcc γ-Fe layer for which the mismatch to the substrate is 11%. We point out a simple error in their calculations of mismatch, and suggest instead that such growth produces a bcc α-Fe(100) film, for which the mismatch to the substrate is only 0.8%.     

Comment on ‘activated chemisorption of methane and tunneling: A second look’ by T.C. Lo and G. Ehrlich

We have previously reanalyzed the data of Lo and Ehrlich on the activated chemisorption of CH₄ and CD₄ on W(211) in terms of a tunneling model. In the Letter cited above, Lo and Ehrlich criticize the tunneling model due to an insensitivity of the model with respect to the mass of the heavier isotope. In this Comment we show why the mass insensitivity is a natural consequence of the smaller tunneling probability for the deuterium isotope, and not a breakdown in the model.     

Dynamical Processes on Complex Networks,by A. Barrat,M. Barthélemy and A. Vespignani

The present state of theory and experiment on the gravity-induced electric field in metallic conductors and the electric field in accelerated metal conductors is reviewed. The relevant equations are derived in very simple approximations. The results depend on whether the deformation of the lattice of positive ions is neglected or is taken into account. Experimental results obtained with freely falling electrons in a cavity in the metal do not agree with the measurements of potentials on rapidly spinning metal rotors. Older direct measurements of the specific charge of carriers in metallic conductors are also mentioned.     

Comment on ‘Lifetime broadening in angle-resolved photoemission’ by A.B. McLean,C.E.J. Mitchell and I.G. Hill

In a recent letter [A.B. McLean, C.E.J. Mitchell and I.G. Hill, Surf. Sci. 314 (1994) L925] it was suggested that life-time broadening alone could explain why surface state photoemission line-widths have been observed to increase as the initial states approach the Fermi level. I wish to point out that the used model is unphysical, that the agreement with experimental data is quite fortuitous, and that the experimental observations are satisfactorily understood in terms of established models.     

Comment on ‘Cr LVV Auger emission and photoreduction of hexavalent Cr oxides by A.G. Schrott,G.S. Frankel,A.J. Davenport,H.S. Isaacs,C.V. Jahnes and M.A. Russak’

A paper by Schrott et al. [Surf. Sci. 250 (1991) 139] on the Auger Cr LVV spectra of Al/Cr alloys is commented on.The area of major disagreement regards the hypothesis that Al-alloying suppresses the Cr LVV decay. It is pointed out that the surface chemical composition of the alloys should be considered in detail, and that instrumental factors and the presence of surface contamination would account for the negligible Cr LVV intensity.     

Analysis on Mural Structures and Components of the Tombs in Liao Dynasty (A.D. 907–A.D. 1125)

The compositions of plaster, pigments, and binding medium were identified using micro-Raman spectroscopy, scanning electron microscopy coupled with energy-dispersive X-ray, and gas chromatograph-mass spectrometer. The results show that the plaster was calcium carbonate; the red color was ascribed to hematite; the blue pigment was ultramarine; the black pigment was carbon; and the yellow pigment was litharge. Animal glue as the binding medium was mixed in the pigments. Dissolved salt (mirabilite) was confirmed on the tomb passage. The mural detachment was detected with portable infrared thermal imager, and this damage resulted from the soil layer. This will serve as the basis for repairing the murals and reliable methods for identifying ancient murals.     

Comment on “Chromatin fiber functional organization: Some plausible models” by A. Lesne and J.-M. Victor

In this comment on the contribution of A. Lesne and J.-M. Victor I provide some additional ideas on the hypothesis that higher-order chromatin structures stamp their marks on their small subunits.     

Local characteristics and acoustical energy of radiation on vibrating surface: Ⅰ. Theory

1IlltroductionUptonow,theradiationcharacteristicsofcomplicatebodieshavebeenwidelystudiedtheoreticallyandexPerimelltallybuttheresultisnotperfect.Thedifficultyliesinthecompli-catedphaserelationbetweentheparticlevelocityandthesoundpressureonvibratingsurface,whichgovrnstheradiationcharacteristicsandtheradiatedenergy.Vibratingsurfaceandradiatedsoundhaveacausality'sothatthereekiststheregularity.Inthefieldofphysics,thereisthecliromaticdispersionrelationforthesystemswiththecausality.Thechromaticdispe…