Showing papers in "Physica D: Nonlinear Phenomena in 1942"

TL;DR: In this paper, the Abbe method is used to calculate the image of a coarse transparent grating with shallow grooves of arbitrary form (phase grating), and the effect of the diffraction by the phase strip is considered and practical methods discussed to make the resulting diffraction-halo as faint as possible.

TL;DR: In this article, the warmeabgabe bei freier Konvektion in Luft von vertikalen quadratischen parallelen Platten of h × h cm2 im gegenseitigen Abstand b wird gemessen.

TL;DR: In this article, the boundary problem arising from phenomenological assumptions about the diffusion and thermal diffusion process between parallel plates in liquids (Soret effect) is rigourously integrated, and an approximate expression is derived, that can be applied for the usual temperature differences and ratios of thermal diffusion coefficient to diffusion coefficient.

TL;DR: In this article, the repulsive interaction energy between two hydrogen molecules is calculated by the quantummechanical perturbation theory, using the H e i t 1 e r-L o n d o n-W a n g wave-function for the unperturbed hydrogen molecule.

TL;DR: In this paper, a spin arbitraire is used to decrire the masses of a set of particules in order to determine the representation irreductible of a given set of matrices.

TL;DR: In this paper, das negative Resultat bekannt gegeben eines Versuches magnetische Kernmomente zu ermitteln durch Beobachtung von anomaler Dispersion im normalen Kurzwellengebiet.

TL;DR: In this paper, the application of such electrode systems in amplifying valves for very high frequencies, leading to high output alternating currents, is discussed, comparing them with known arrangements, giving much less output currents.

TL;DR: In this paper, it is shown that in K2Cu(SO4)2.5 aq, there are nearly tetragonal Cu++(H2O)6 clusters, and the splittings of the 2D-state are of the order 20,000 cm−1.

TL;DR: In this article, Schmidt, Pohlhausen, and Beckman showed that a kleine Durchmesser geltende Formel is so ausgebreitet, dass sie fur grosse DurchMesser ubergeht in die Formel von Schmidt, Pehlhausen und Beckman fur die vertikale Platte, and fur gleichseitig dreieckigen Querschnitt w.r.t.

TL;DR: In this paper, an analysis of the 2 1 S-and 2 3 S-state excitation functions of metastable states in helium and neon was performed at a pressure of 0,00024 mm.

TL;DR: In this article, isotherms of ethylene are given which have been measured at temperatures 0, 25, 50, 75, 100, 125 and 150°C up to 3000 Atm.

TL;DR: In this article, the authors derived a new formula for the internal field in a gaseous or liquid dielectric in which a homogeneous field prevails, and showed that the mean value (in space) is exactly equal to Lorentz' well-known expression F = E + 4 3 π P.

TL;DR: In this paper, the authors gezeigt, dass man unter Benutzung einiger plausibel erscheinenden Annahmen, die Grosse der elastischen Nachwirkung in Kohlenstoff enthaltendem Eisen aus den Gitterdimensionen des tetragonalen Martensits grossenordnungsmassig voraussagen kann.

TL;DR: In this paper, a new formula for the relation between the dielectric constant, the polarisability and the density of nonpolar gases and liquids, which explains that the molecular polarisation PM depends on the pressure, when the latter reaches high values.

TL;DR: In this article, a Formel fur die Warmeubertragung (W.U.) von vertikalen Zylindern bei is verallgemeinert.

TL;DR: In this article, the authors focus on the grundlegende Bedeutung des ubertragenen Frequenzbandes bei Empfangern und Verstarkern hingewiesen.

TL;DR: In this paper, a general expression for the separation, depending on two dimensionless functions of the parameters of the problem, is obtained, and the influence of some of these parameters is considered.

TL;DR: In this article, a straight wire of infinite conductivity and uniform cross section is considered, and an antenna form factor is defined, where the external impedance of the wire is given in the form of a fraction of which both numerator and denominator are power series in Ω − 1.

TL;DR: In this article, the intensity profiles of the 0-0 and 1-1 CN bands in the case of a non-resolved rotational structure were computed for several temperatures, and from these profiles three more convenient but less complete criteria for the temperature have now been derived, namely the usual band-area ratio, the top-intensity ratio, and, a.o., the slope of the back of a band.

TL;DR: In this paper, the warmeubertragung (W.U.) of Zylindern and Kugeln durch freie Konvektion in Luft wird gemessen.

TL;DR: In this article, the melting line of carbon dioxide has been measured up to 2800 atm according to the method of the blocked capillary and a cryostat and temperature regulating system are described which allowed the temperature to be controlled within 0.0003 o

TL;DR: In this article, the intensity profiles of the 0-0 and 1-1 CN bands in the case of non-separated rotational lines have been calculated in dependence on the temperature and on the line-breadth by substituting the observed vibrational transition probabilities and the observed wave numbers in the theoretical intensity relations.

TL;DR: In this article, a method for the liberation of electrons from solids by collision with electrons is described, where the effect of metastable atoms and that of photons are separated with the aid of a method in which alternating tensions are applied, making use of the relative slowness of the metastable atom.

TL;DR: In this article, a new Serie von Messungen der paramagnetischen Absorption in Kalium-Chromalaun bei mit flussiger Luft erreichbaren Temperaturen sowohl in parallelen wie auch in senkrecht orientierten Magnetfeldern.

TL;DR: In this article, a partir des valeurs experimentales, le temps de relaxation for l'etablissement de l'equilibre entre l'energie de translation and l'energy de rotation, a ete calcule.

TL;DR: In this paper, the high frequency susceptibility of chromium alum is calculated on the two assumptions that the spin system does and does not reach internal thermodynamical equilibrium, and theoretical arguments are given for the latter.

TL;DR: In this paper den Bedurfnissen der Messpraxis entsprechend sind Messgerate, die: eine genaue und leichte Bestimmung des Auflosungsvermogens und der Ladungsmenge gestatten, neu entwickelt worden.

TL;DR: In this paper, the temperature determination from the CN bands 3883 and 3871 A in the case of non-resolved rotational structure (prism spectra) is presented.

TL;DR: In this paper, the heat conductivity of solid methane is investigated in the neighbourhood of its transition point: 20.4°K and a discontinuity similar to that in the specific heat has been found and the order of magnitude of the effect is in agreement with a simple theoretical consideration.