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Showing 50 of 25456 papers
Recent Advances in Applied Acoustics
In reviewing works concerned with elucidating the properties of hearing, the work of Traeger must be placed first. He succeeded, using precise physical methods, in investigating the properties of the tympanic membrane in a living subject. To study the properties of the tympanic membrane, the reverse…
New Observations of the Deflection of Light Rays in the Gravitational Field of the Sun
Essay on the Development of the Doctrine of the Structure of the Atomic Nucleus
REPETITIONS OF THE MICHELSON EXPERIMENT *
MAGNETISM AND SPECTROSCOPY\*
Report delivered at the Solvay Congress in October 1930.
On the Nature of Activation Heat and the Behavior of Activated Molecules
The question of the interaction of atoms has in principle been fully resolved by quantum mechanics. We can describe this interaction, conveying, in the case of atoms with a low atomic number, all the features of the formation or dissociation of molecules, determining the dissociation energy of molec…
Hydrogen Isotope with Mass 2
The question of the existence of such an isotope is not new. As early as 1920, Rutherford, from observations of the artificial disintegration of nitrogen and oxygen nuclei, considered it possible to conclude that there existed a formation consisting of two protons and one electron, combined into a c…
Artificial Transmutation of Elements by a Fast Proton Beam
On Carbon Monoxide Poisoning
NOISE AND METHODS OF ITS MEASUREMENT \*
Noise control is of outstanding interest from the most diverse points of view, ranging from urban improvement to defense problems. The article printed below is by H. Kay, Director of the National Physical Laboratory in Teddington (near London). Although the author deals exclusively with examples fro…
Elementary Processes in the Impact Ionization by Material Particles
Laboratory Methods for Generating Fast Electrons and Protons
An Outline of the Development of the Theory of the Atomic Nucleus*
A highly important method for obtaining information on the structure of the atomic nucleus is the study of the spectra of gamma rays emitted by nuclei excited in the process of radioactive decay. Owing to the very short wavelength of gamma rays, conventional diffraction methods for investigating spe…
Discussion on the Structure of the Atomic Nucleus \*
The discussion took place on April 28, 1932, at the Royal Society of London.
NEW APPROACHES TO STUDYING THE NATURE OF COSMIC RAYS
An Affordable Sterilizer for Disinfecting Spoons in Public Dining Halls
Elementary Processes in Ionization by Impact of Material Particles
Recent Advances in Applied Acoustics
Among the sound receivers used for technical purposes, let us first consider the condenser microphone. Condenser microphones are connected both according to Wente's low-frequency circuit and according to Riegger's high-frequency circuit. The high-frequency circuit has found application in research w…
Barrier-Layer Photocells
Over the past 3–4 years, a third type of photoelectric effect—the barrier photoelectric effect—has been added to the two long-known types (external and internal). The latter occurs at the interface between two bodies. However, the barrier photoelectric effect is not possible with every contact: it a…
Recent Advances in Applied Acoustics
On Artificial Lighting in Schools¹
KONSTANTIN ALEXANDROVICH LEONTIEV
On the Results of the Conference on Planning Scientific Research Work
Active Nitrogen
Recent Advances in the Production and Measurement of High Vacuum\*
Monomolecular Reactions in Modern Chemical Kinetics
H. WEYL, *Gruppentheorie und Quantenmechanik*, 2nd ed.
Book review: H. Weyl. Gruppentheorie und Quantenmechanik.
ELECTRONIC THEORY OF METALS\*
THE RAMAN EFFECT AND ITS SIGNIFICANCE FOR SPECTROSCOPIC STUDIES OF MOLECULAR STRUCTURE*
Report at the XXXV Congress of the German Bunsen Society for Applied Physical Chemistry, 28/V–1/VI 1931, in Heidelberg.
Photoelectric Cells in Science and Technology*
The purpose of this work is to give a brief overview of the current technical development of the photocell. Such an overview will make it easier for every natural scientist to apply the photoelectric effect in his specialized field of work. An account of the development of theoretical views, althoug…
On the Physical Nature of the Latent Photographic Image
NEW CONCEPTS OF GAS DISCHARGE DEVELOPMENT
ELECTRICAL DISCHARGES IN GASES\*
Experimental Studies in Strong Magnetic Fields*
Report delivered at the Solvay Congress in Brussels in October 1930.
ELECTRIC DISCHARGES IN GASES
TECHNIQUE FOR MANUFACTURING PHOTOCELLS\*
Report at a public meeting of the Optical Institute in Paris on June 13, 1930.
STRIPED SPECTRA
IVAN IVANOVICH TIKHANOVSKY
PHYSICS IN THE SERVICE OF SOCIALIST CONSTRUCTION
ON SOME CONTEMPORARY PROBLEMS IN THE FIELD OF OSCILLATIONS\*
Report at the 1st All-Union Congress of Physicists in Odessa, August 22–23, 1930.
Recent Advances in Applied Acoustics
Some Applications of X-rays
W. HUME-ROTHERY. The metallic state. Electrical properties and theories. Oxford. 1931.
W. Hume-Rothery. The metallic state. Electrical properties and theories.
Newly Published Books
R. Courant. _A Course in Differential and Integral Calculus._ Part One. Functions of One Variable. Translated from the German by Yu. Rabinovich and V. Livshits. GIZ, Moscow–Leningr
Book review: R. Courant. A Course of Differential and Integral Calculus. Part One. Functions of One Variable.
Eng. B. V. Koshevoi. Fundamentals of Engineering Thermodynamics, a textbook for higher technical educational institutions, TNTI, 1931, 228 pp.; price 2 rubles 25 kopecks.
Book Review: Engineer B. V. Koshevoy. Fundamentals of Engineering Thermodynamics.
THE RELATIONSHIP BETWEEN SPECTROSCOPY AND CHEMISTRY\*
A lecture delivered in Bristol (Wills Memorial Lecture) on October 25, 1930.
Some Applications of X-rays. Organic Compounds
In this article, we intend to consider studies of organic compounds carried out using X-rays and to show in sufficient detail what theoretical and practical conclusions can be drawn from this study in a field that until now has remained closed to spectrographic investigations by X-rays. Here we shal…
A NEW THEORY OF HEARING
Presented at a meeting of the Acoustical Society of America.