Teller's conditions regained

Recent criticism againts Teller's conditions for the crossing of potential energycurves is shown to be unjustified.     

Determinism,realism, and Stapp's 1985 proof of nonlocality

Two recent criticisms of Stapp's 1985 proof of an incompatibility between locality and quantum mechanics are clarified. One of these criticisms (charging that the proof requires determinism) is supported by a detailed logical analysis of the locality conditions in the proof. The other criticism (charging that the proof assumes realism) is shown to be based upon a misinterpretation of the rôle of counterfactuals in the proof. Further, Stapp's own replies to these criticisms are shown to be inadequate.     

Model for magnetostrictive spontaneous metamagnets

Starting from a criticism of exchange-inversion theories a general rule for any theory of spontaneous metamagnetism is derived. It is shown that a new model with four-spin coupling and magnetostriction satisfies the new rule and describes well even the controversial metamagnetic transition in Mn₃GaC.     

Response to Z. Banach's comments on the modified moment method and irreversible thermodynamics

In this paper the author responds to the comments on the modified moment method and irreversible thermodynamics made by Z. Banach [Physica A 145 (1987) 105]. In this paper Banach suggests a variational method in which the Lagrange multipliers are determined from the constraints alone by disregarding the entropy balance equation. It is shown that since this method does not yield an extended Gibbs relation consistent with the entropy balance equation or the H-theorem, there is no irreversible thermodynamics formalism afforded by the method. Consequently, his criticism cannot be supported from the viewpoint of irreversible thermodynamics. It is also pointed out that neither is there a mathematical and physical support for the criticism he makes on the cumulant expansion for the Boltzmann collision integral.     

Comments on “mode-locked pulses of homogeneous gain lasers”

Radmore's criticism of a paper by Piché and Bélanger concerned with the mode-locked pulses emitted by a loss modulated homogeneous gain laser is shown to be misleading.     

Comments to paper by Spitas “A continuous piecewise internal friction model of hysteresis for use in dynamical simulations (Journal of Sound and Vibration 324: 297-316)”

In this discussion paper, it is shown that the criticism given in the paper mentioned in the title and relating to the so-called modified hysteretic model is not justified.     

Reply to “nonequivalence of ether theories and special relativity. comment on recent interpretation of Lorentz' Ether theory”

The role played by coordinates in the formulation of an absolute spacetime theory is assessed. It is shown that recent criticism on previous work of ours is wrong.     

Comment: Laudatores Temporis Acti,or Why Cosmology Is Alive and Well—A Reply to Disney

A criticism of cosmological methodology and achievements by Disney (l2000) is assessed. Some historical and epistemological fallacies in that article have been highlighted. It is shown that—both empirically and pistemologically—modern cosmology lies on sounder foundations than it is portrayed. A brief historical account demonstrates that this form of dissatisfaction with cosmology has had a long tradition, and rather meager results in the course of the 20th century.     

What's Wrong with this Rebuttal?

A recent rebuttal to criticism of Bell's analysis is shown to be defective by fault of failure to consider all hypothetical conditions input into the derivation of Bell Inequalities.     

Reply to “on one of the ways of application of the lattice-gas model to describe the kinetics of desorption” by V.P. Zhdanov

Zhdanov's criticism on the applicability of our desorption rate which is proportional to the factor θ/(1−θ), where θ is the surface coverage, is shown to be irrelevant. To be precise, the difference between our and former conventional transition state theory is clarified. Also, the differences between our model and the precursor model are stressed, although these two models result in a similar desorption rate.     

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.     

On Bub's misunderstanding of Bell's locality argument

Bub's criticism of Bell's locality postulate is discussed. The locality postulate is explained, and it is shown that Bub is in fact arguing against a class of theories which are subject to stronger restrictions than this postulate, and therefore his refutation of the latter is misleading.     

Bohmian mechanics in momentum representation and beyond

It is shown how to extend Bohmian mechanics to an arbitrary representation, based on the polar form of the wave function. The early criticism of Pauli and Heisenberg concerning the asymmetric role of the position variable in Bohm's approach can be removed by presenting the momentum space version of the theory. It is illustrated that for certain problems, like the motion in a linear position-dependent field, the momentum space representation can be advantageous. This analysis also allows to trace back the origin of the quantum potential to the squaring of complex quantities and the resulting mixing of phase and amplitude.     

The Meaning of Elements of Reality and Quantum Counterfactuals: Reply to Kastner

This paper is an answer to the preceding paper by Kastner, in which she continued the criticism of the counterfactual usage of the Aharonov-Bergman-Lebowitz rule in the framework of the time-symmetrized quantum theory, in particular, by analyzing the three-box paradox. It is argued that the criticism is not sound. Paradoxical features of the three-box example are discussed. It is explained that the elements of reality in the framework of time-symmetrized quantum theory are counterfactual statements, and therefore, even conflicting elements of reality can be associated with a single system. It is shown how such counterfactual elements of reality can be useful in the analysis of a physical experiment (the three-box example). The validity of Kastner's application of the consistent histories approach to the time-symmetrized counterfactuals is questioned.     

Note on the significance of the Aharonov-Bohm effect

The fringe shift first predicted byEhrenberg andSiday and subsequently more fully discussed byAharonov andBohm has been consistently explained in terms of a classical interaction energy arising from overlap of the electron's and solenoid's magnetic fields.Kasper criticizes this theory on the ground that “skin effect” would prevent penetration of the electron's magnetic field into the interior of the solenoid. This criticism is shown to be invalid.     

Enskog-like kinetic models for vehicular traffic

In the present paper a general criticism of kinetic equations for vehicular traffic is given. The necessity of introducing an Enskog-type correction into these equations is shown. An Enskog-like kinetic traffic flow equation is presented and fluid dynamic equations are derived. This derivation yields new coefficients for the standard fluid dynamic equations of vehicular traffic. Numerical simulations for inhomogeneous traffic flow situations are shown together with a comparison between kinetic and fluid dynamic models.     

Properties of modified quantum dynamics

The general nature of the dynamics that can be described by an equation for the density matrix of nonrelativistic quantum systems previously proposed by us [1] is studied. It is shown that it leads to an experimentally observed constraint on the states of the microscopic and quasi-macroscopic systems by states that can be described by more or less localized wave packets in phase space and replaces the ordinary spreading of these packets by statistically deterministic transitions between corresponding states. This makes possible a purely dynamic solution of the problem of the classical object and of the problem of measurement in quantum mechanics.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 63–67, May, 1976.I wish to express my deep appreciation to Prof. V. G. Bagrov for his interest in the study and for criticism.     

关于电磁复合聚焦阴极透镜的象差理论

本文对电磁复合聚焦阴极透镜的象差理论进行评述与研究,着重分析西门纪业和Бонштедт两篇代表性的文章,详细推导了两文的象差方程和象差系数。研究表明,尽管两文的象差系数在形式上迥然不同,但实质上是完全一致的,是可以互相转化的。从而证明Бонштедт对西门纪业的批评是没有根据的。按照我们的研究,成象系统的象差应在某一轴向初电位ε_(x1)而非ε_x所对应的象面上进行考察,从而导出电磁复合聚焦阴极透镜包括一级象差与三级象差在内的全部横向象差表达式 关键词：