Can the two-time interpretation of quantum mechanics solve the measurement problem?

Over many years, Aharonov and co-authors have proposed a new interpretation of quantum mechanics: the two-time interpretation. This interpretation assigns two wavefunctions to a system, one of which propagates forwards in time and the other backwards. In this paper, I argue that this interpretation does not solve the measurement problem. In addition, I argue that it is neither necessary nor sufficient to attribute causal power to the backwards-evolving wavefunction $〈\Phi |$ and thus its existence should be denied, contra the two-time interpretation. Finally, I follow Vaidman in giving an epistemological reading of $〈\Phi |$.     

Über die Entstehung von Dehydracetsäure und ihren Analogen bei der Oxydation derα, γ, δ, ζ-Tetraketone mit Bleitetraacetat

Summary Oxidation of, , , -Tetraketones (I) with lead-tetraacetate yields dehydracetic acid and analogous compounds (IV). The reaction can be understood if one assumes that acylketenes (III) are formed as intermediates through the glycol-fission of the dienolic form II of the tetraketones.     

Apparition d'une protéine nouvelle,la contractine,dans les extraits de muscles contractés

Summary When rabbit muscles are fatigued, the electrophoretic pictures of the extracts of these muscles are free from -myosin and show a large decrease in the amount of ₁ and ₂-myosin.When the muscles are contracted by monobromacetate or stimulated and fixed in a contracted state by liquid air, -myosin is very much decreased, ₁ and ₂-myosin disappears entirely, and a new component appears which is called contractin.The disappearance of the classical myosins and the appearance of this new protein in the extracts ofshortened muscles, may be of great interest in the study of the protein changes responsible for muscle contraction.     

Existe-t-il des maladies raciales? Peut-on envisager un rapport entre le cancer et la race?

Summary E. Pittard gives in the first place a definition of race, urgently needed at present. The author shares the opinion ofde Quatrefages that the races have their pathological features as well as their clearly defined anatomical characteristics. The racially conditioned frequency of cancer is made evident by the example of the distribution of cancer in Italy and France. Finally the author argues for a statistic of cancer on ethnical and not exclusively national basis.     

Über ebene axialsymmetrische Punktmengen

Summary The principal results of the present inquiries are: If a plane quantity of points M has a finite number of symmetrals n, which intersect in a point S, these symmetrals form a regular fascicle of straight lines, with an angle/n of two subsequent symmetrals. If is the angle between two straight lines with the intersection point S, you may or may not supplement them to a regular fascicle of symmetrals of a quantity of points M, by adding a finite number of straight lines, according as represents a rational or irrational multiple of 2. If the angle of two symmetrals of M with the intersection point S is an irrational multiple of 2, there will be to every straight line g through S a symmetral of M, which comprises with g, a small angle of the size you may choose. If M is closed, then in this case every straight line g through S will be a symmetral of M.The symmetrals of a limited quantity of points will intersect in an exact point.

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Die Verfasser sind zur vorliegenden mathematischen Untersuchung durch den Versuch einer mathematischen Behandlung verschiedener Probleme, die Gasausscheidung aus gashältigen Flüssigkeiten betreffend, veranlaßt worden.     

Différenciation électrophorétique de myosines dans les muscles au repos et fatigués,de Mammifères et de Mollusques

Summary Rabbit as well as Mollusks myosin solutions are composed of three electrochemical distinct components:, and myosins, moving with the same speed in both species at definitep _H and ionic strength.Turbidity of myosin solutions is connected with the boundary.After the muscle has been stimulated till exhaustion, the component disappears and the component is very markedly decreased or absent.     

Die radiofrequente Strahlung der Sonnenkorona

Summary From the theory of the free-free-transitions of the electrons in the solar corona the absorption coefficient and optical thickness of the corona are calculated. From these the intensity of the coronal radiation at radio-frequencies is deduced for different distances from the centre of the sun's disc (Fig. 1). In fig. 2 the spectral intensity-distribution is given for radiation coming from the sun's centre (=0), from the sun's limb (=1), and from a point one solar radius outside the sun's limb.     

Oberflächenspannung und Schallgeschwindigkeit

Summary The preceding empirical relation was found between the surface tension of liquids, the specific weight of liquids, and the velocity of sound:=6.3 · 10^{–4 3/2}. In place of the vèocity of sound can be used, with suitable changes in the equation, the compressibility or, in the case of solid substances, the elasticity of the material in question. The range of validity of this relation is so large that it is possible by means of it to calculate the surface tension of solid substances and of gases.     

Bemerkung über additive Mengenfunktionale

Summary The author analyses the influence of a similar-representationA A of sets of then-dimensional Euclidean space on the value of an additive, translation-invariant functional (A). Under very general suppositions ( A) is a rational integral functions of at most from then ^th degree.