In diesem Beitrag wird eine Methode zur Bestimmung der topologischen Relatio nen zwischen zwei in ihrer Lage unsicheren Regionen vorgestellt Die Bestimmung basiert auf den Extremwerten einer Abstandsfunktion entlang eines Skeletts durch unsichere Schnittmengen zwischen den Regionen Mit einer solchen Repr asentation vertiefen wir die Relationskonzepte der Intersektion indem wir uber topologisch ...

We study the quantum-interference eeect for the single ballistic Aharonov-Bohm billiard in the presence of a weak magnetic eld B. The diagonal part of the wave-number averaged reeection coeecient R D is calculated by use of semi-classical scattering theory. In addition to the appearance of "h=2e oscil-lation" which is caused by interference between time-reversed coherent back-scattering classic...

Tightly coupled mitochondria isolated from Ehrlich ascites tumor cells contain a latent adenosine triphosphatase (ATPase) that is stimulated by a range of dinitrophenol concentrations up to 0.5 mM. Maximal uncoupler-stimulated ATPase activity is approximately 60% of that found with rat liver mitochondria and is inhibited by oligomycin and by atractyloside. Rapid rates of ATPase activity accompa...

A novel criterion for placement of actuators on exible mechanical structures is presented Using simulated measured modes obtained from the model the pro posed criterion maximizes the correlation of the mea sured modes and the normal modes The measured modes deviate from the normal modes due to damp ing measurement noise and process noise The sta tistical properties of the criterion are investig...

In the case of zigzag air classifier of standard depth the channel depth dt is fixed by the section length Ls and the angle between the sections a. The channel width Wc remains to be specified. The author chose the square-bottom configuration (JI c = Ls = 20 cm) for three air classifiers investi­ gated in the paper. An alternative choice is to have Wc inversely proportional to sin a, 0 < a < 18...

In a previous paper (3) describing experiments in which DBA/1 female mice and the transplantable dbrB adenocarcinoma indigenous to that strain were used, it was demonstrated that the inoculation of living tumor cells resulted in a sub stantial increase in resistance to subsequent tumor implants. Under certain conditions the technic em ployed rendered the animals completely refractory to seconda...

A b st r act . The relationship between "learning" in ad aptive layered networks and the fit ting of data wit h high dimensional surfaces is discussed . T his leads natu rally to a picture of "generalization" in terms of interp olation between known data points and suggests a rat ional approach to th e theory of such networks. A class of adaptive networks is identified which makes the inte rpo ...

The title compound, C(14)H(19)NO(3), was obtained as one of the two isomers of a Sharpless asymmetric dihydroxy-lation reaction of (1S)-1-[(1R)-1-phenyl-ethyl]-4-vinyl-pyrrolidin-2-one. The absolute stereochemistry of this isomer was determined from the known stereochemistry (R) at the bridge C atom between the phenyl and pyrrolidine rings. The mol-ecules form one-dimensional tapes along the b ...

A 45-yr-old female presented with a ness in spite of a bone marrow biopsy rapidly enlarging bony tumor that was showing myelofibrosis and liver biopsy eventually identified as a Philadelphia documenting extramedullary hematopoiechromosome (Ph’)-positive myeloprolifersic. This case represents a unique constelative disorder with extramedullary blastic lation of features of the myeloproliferative ...

lation. Recent studies show that signaling through integrin As a first step in describing the nature of the crosstalk receptors is required for normal cell movements durbetween integrin and C-cadherin, Marsden and DeSiing Xenopus gastrulation. Integrins function in this mone present evidence that integrin-mediated homoprocess by modulating the activity of cadherin adhetypic cell binding in diff...