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1.
In their paper A note on Misunderstandings of Piron's Axioms for Quantum Mechanics, Foulis and Randall undertake a reply to our critique of Piron's question-proposition system (qp-s) which appeared in previous issues of this journal. In the present paper, we want briefly to refute the points of criticism raised by Foulis and Randall (FR). We argue that the misunderstandings are not ours, and we prove it. 相似文献
2.
J. Habanec 《Czechoslovak Journal of Physics》1962,12(11):821-832
The paper solves the problem of gas ionization in a discharge path in a very dilute gas, where the free path of the electrons is much larger than the dimensions of the path and the transit time of the electrons between the electrodes is of the order of the period of the applied h-f voltage. It was found that for a certain ratio of the transit time of the electrons between the electrodes in the discharge path to the period of the h-f oscillation, resonance occurs when the wattless current component is zero. The electron density rises in the path and thus also the gas ionization.
In conclusion, the author would like to thank F. Benda for preparing the equipment, M. Kivánek for preparing the equipment and some of the measurements, and A. Hrdá for the measurements and for working out the case with equally large a-c and d-c voltages within the framework of her thesis. 相似文献
, , , . , , . , .
In conclusion, the author would like to thank F. Benda for preparing the equipment, M. Kivánek for preparing the equipment and some of the measurements, and A. Hrdá for the measurements and for working out the case with equally large a-c and d-c voltages within the framework of her thesis. 相似文献
3.
F. Lukeš 《Czechoslovak Journal of Physics》1960,10(1):59-65
The paper gives the values of the optical constants of thin films of germanium obtained by evaporating germanium in a vacuum onto glass slides in the region of 0·35–0·78 for an index of absorptionk and 0·35–2·5 for refractive indexn. The results are compared with the values obtained by other authors and with the values ofn andk for single crystals. It is shown that these values for thin films and single crystals slightly differ quantitatively but agree fairly well qualitatively, which had not been sufficiently the case in previous papers.
, , 0,35 0,78 k 0,35–2,5 n. n, k . , , , , .相似文献
4.
K. Toman 《Czechoslovak Journal of Physics》1960,10(3):208-214
The change in integrated intensity of the (200) reflections of a solid solution during the formation of G.P. zones was measured and compared with the change in the character of the diffuse streaks corresponding to them. It was found that the. formation of G.P. zones does not lead to a decrease in primary extinction despite the great changes in the distribution of the copper atoms. It was shown that the formation of a precipitate accompanied by the formation of crystallographically incoherent boundaries greatly decreases the primary extinction.
. II. 1-u 4%: [. . ]
(200) . . , . , . . , . , , , .相似文献
5.
6.
F. Roubínek 《Czechoslovak Journal of Physics》1960,10(12):949-953
Zusammenfassung Es wurde der Einfluß eines Bombardements mit Stickstoffionen vor der Erregung untersucht und gezeigt, daß die Stiekstoffatome eine große Rolle bei der Entstehung des Emissionsmaximums bei 150° spielen.
-
, 150°C.相似文献
7.
E. Duering R. Blumenfeld D. J. Bergman A. Aharony M. Murat 《Journal of statistical physics》1992,67(1-2):113-121
The current and logarithm-of-the-current distributionsn(i) andn(ln i) on bond diluted two-dimensional random-resistor networks at the percolation threshold are studied by a modified transfer matrix method. Thek th moment (–9k8) of n(ln i) i.e., ln i&k, is found to scale with the linear sizeL as (InL)(k). The exponents (k) are not inconsistent with the recent theoretical prediction (k)=k, with deviations which may be attributed to severe finitesize effects. For small currents, ln n(y)–, yielding information on the threshold below which the multifractality of
(i) breaks down. Our numerical results for the moments of the currents are consistent with other available results. 相似文献
8.
A study is made of the influence of successive asymmetrical magnetization reversal on the magnetic state of open samples, where the macroscopic demagnetization field has a significant effect during magnetization reversal and leads to a sort of rotation of the asymmetrical loops performed one after another. This effect is similar to reptation, which was studied experimentally by Nguyen van Dang [1–4] and theoretically explained by Néel [5, 6]. The quantitative expression of the rotation of asymmetrical loops in open samples as a function of the number of loops and amplitude of the disymmetry is similar to that with the reptation effect.
In conclusion the authors thank Dr. L. Valenta, C. Sc., and Z. Málek, C. Sc., for valuable discussions. 相似文献
, , . , . .
In conclusion the authors thank Dr. L. Valenta, C. Sc., and Z. Málek, C. Sc., for valuable discussions. 相似文献
9.
Karel Toman 《Czechoslovak Journal of Physics》1959,9(3):367-376
On the basis of the correlation of diffraction data (intensity and width) of a precipitate with the intensity of reflection of a matrix solid solution it is shown that the change in primary extinction during the decomposition of a solid solution of Agin Alis caused by the precipitation of the phase Ag2Aland not by the production of lattice defects (zones, stacking faults).
Reported in part at the VIth Scientific Technical Conference on the Application of X-rays held in Leningrad in 1958.
The author thanks M. Mikovský for preparing the single crystals of the alloy Al-Ag having a high primary extinction and J. Laek and Prof. J. Bedná for carefully checking their homogeneity and chemical composition. 相似文献
I. Al-Ag
( ) , Ag Al Ag2Al, ( , ).
Reported in part at the VIth Scientific Technical Conference on the Application of X-rays held in Leningrad in 1958.
The author thanks M. Mikovský for preparing the single crystals of the alloy Al-Ag having a high primary extinction and J. Laek and Prof. J. Bedná for carefully checking their homogeneity and chemical composition. 相似文献
10.
Gary R. Gruber 《Foundations of Physics》1972,2(1):79-82
In connection with another article by the author, we show how it might be possible to travel faster than the speed of light. We show that for clocks and rods moving faster than the speed of light, we get instead of time dilation and Lorentz contraction, respectively, time contraction and Lorentz expansion, respectively. It is shown that this paper is in confirmation with earlier articles dealing with this subject. 相似文献
11.
V. N. Davydov 《Russian Physics Journal》1988,31(4):338-342
The internal structures, composite elements, electrophysical properties, and characteristic parameters of impurity clouds, noise supertraps, disordered domains, and stacking defects are compared in crystalline semiconductors. It is shown that the mentioned macrodefects possess common properties: They have a nucleus and an impurity atmosphere, are separated by a potential barrier, are shaped with the participation of Frenkel defects and oxygen ions, have a threshold inclusion, sharply increase the rate of charge carrier generation-recombination as the electrical field grows, etc. It is noted that current channels in non-crystalline semiconductors are characterized by properties close to these after they have been formed. It is assumed that the electrical activity of the structural macrodefects in crystalline semiconductors may be related to the fundamental properties of noncrystalline semiconductors (for instance, the resistance switching effect). Domains adjoining a macrodefect and destroyed by it visibly manifest these properties.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 4, pp. 95–100, April, 1988. 相似文献
12.
Miklós Rédei 《Foundations of Physics》1995,25(3):411-422
The projection latticesP(1),P(2) of two von Neumann subalgebras 1, 2 of the von Neumann algebra are defined to be logically independent if A B0 for any 0AP(1), 0BP(2). After motivating this notion in independence, it is shown thatP(1),P(2) are logically independent if 1 is a subfactor in a finite factor andP(1),P(2 commute. Also, logical independence is related to the statistical independence conditions called C*-independence W*-independence, and strict locality. Logical independence ofP(1,P(2 turns out to be equivalent to the C*-independence of (1,2) for mutually commuting 1,2 and it is shown that if (1,2) is a pair of (not necessarily commuting) von Neumann subalgebras, thenP(1,P(2 are logically independent in the following cases: is a finite-dimensional full-matrix algebra and 1,2 are C*-independent; (1,2) is a W*-independent pair; 1,2 have the property of strict locality. 相似文献
13.
J. W. G. Wignall 《Foundations of Physics》1987,17(2):123-147
The author has recently proposed a quasi-classical theory of particles and interactions in which particles are pictured as extended periodic disturbances in a universal field (x, t), interacting with each other via nonlinearity in the equation of motion for . The present paper explores the relationship of this theory to nonrelativistic quantum mechanics; as a first step, it is shown how it is possible to construct from a configuration-space wave function (x
1,x
2,t), and that the theory requires that satisfy the two-particle Schrödinger equation in the case where the two particles are well separated from each other. This suggests that the multiparticle Schrödinger equation can be obtained as a direct consequence of the quasi-classical theory without any use of the usual formalism (Hilbert space, quantization rules, etc.) of conventional quantum theory and in particular without using the classical canonical treatment of a system as a crutch theory which has subsequently to be quantized. The quasi-classical theory also suggests the existence of a preferred absolute gauge for the electromagnetic potentials. 相似文献
14.
The paper deals with the motion of 90° wedge domains in BaTiO3 in an alternating field of 50 c/s. The critical field, the positional hysteresis loops with double asymmetry, the production of wedges with polarization perpendicular to the field and 180° substructure in the wedges were studied. The differences between the behaviour of the wedges and the individual 90° walls are pointed out which are caused by differences in the energy balance of these formations and by different interactions with 180° processes. The upper limit of contribution of the wedge motion to the initial permittivity is estimated. The results are discussed from the phenomenological point of view.
90° BaTiO3
90° BaTiO3 , 50 Hz. , , , , , , 180° . 90° , 180° . , . .相似文献
15.
Jan Fischer 《Czechoslovak Journal of Physics》1956,6(1):65-72
. . , . , . , . coo , 13. 5. 1954 . - . 相似文献
16.
The diffusion length, diffusion coefficient and mean life time of thermal neutrons in rigid, Czechoslovak made, diphenyl were measured by the impulse method at the temperature 20°C. The experimental results are discussed.
We thank J. Jadavan and the accelerator group for their co-operation. 相似文献
, ( ) 20°C. .
We thank J. Jadavan and the accelerator group for their co-operation. 相似文献
17.
J. Eckstein M. Holas J. Jindra A. Uchytilová Z. Wachtl 《Czechoslovak Journal of Physics》1960,10(3):247-254
The paper deals with the causes of the yellow colouring of LiF crystals. In accordance with some other writers the authors arrived at the conclusion that colouring is caused by impurities. Selective absorption in the infra-red region at 2·8 is independent of this colouring. Analytical data were supplemented by crystal growing experiments in which defined admixtures of heavy metals, such as Co, Mn, Fe, Cr, Ni, Pt, Cu, were added to the melt. It is shown that, of the admixtures used, the most intense colouring is produced by manganese. Experiments on the effect of Cu and Pt were not entirely conclusive. In vacuum colour-producing impurities evaporate quite easily from the melt until their concentration drops below the critical limit required for colouring; in air this happens only if the charge is left in the melted state for a longer period (in our case a 1 kg charge was kept at 100°C above melting point for 36 hours). Results are improved if a dried gas, for instance nitrogen, is bubbled through the meit. A colourless crystal can be obtained in this manner even without using a vacuum; the starting material, however, must be sufficiently pure. A new method was worked out for preparing the salt by direct precipitation of LiCl and HF. Heavy metals are removed from the lithium component by means of cupral and dithizone. The construction of the apparatus used for the crystal growing experients in vacuum differs from that described in the appropriate literature.
LiF
LiF. , . 2,8 . . , , , Mn, Fe, Cr, Ni, Pt, Cu. , . , . Pt . , , , ( : 1 kg-36 100° ). , , , . , , . LiCl HF. . , .相似文献
18.
, , . : .
The deformation of a whisker with edge dislocation
An approximate solution is given of the deformation of a plate caused by an edge dislocation lying in the central plane. The results are used to discuss the bending of a whisker as a result of an edge dislocation; in the calculations the whisker is approximated as an infinite band.相似文献
19.
Egon F. Holländer 《Czechoslovak Journal of Physics》1959,9(2):229-236
The self-regulation of an inert gas shielded metal welding arc is dealt with briefly. A thermodynamic equation is derived for the self-regulation of such an arc.
. .相似文献
20.