Results 241 to 250 of about 980,901 (302)

CT-number variability in thoracic geometry

American Journal of Roentgenology, 1983
The use of absolute CT numbers for in vivo tissue characterization is compromised by a number of technical and geometrical factors. A phantom simulating thoracic geometry and containing intrapulmonary "features" was scanned on three CT scanners allowing for assessment of CT-number variations with a wide number of scanning and geometric parameters.
E C, McCullough, R L, Morin
openaire   +2 more sources

Trajectory variability: Road geometry difficulty indicator

Safety Science, 2012
The analysis of the variability of vehicle trajectories can reveal important information about how situational constraints influence drivers' behaviour (e.g., lateral position and/or speed). Variability in the lateral position using a driving simulator was examined. Forty-two participants had to drive on two road environments: a 3 km straight road with
Rosey, Florence, Auberlet, Jean Michel
openaire   +1 more source

Geometry underlying no-hidden-variable theorems

Physical Review Letters, 1991
Summary: The set of orientations of a measuring device (e.g., a Stern-Gerlach magnet) produced by the action of a Lie group constitutes a honmogeneous space \(S\) (e.g., a sphere). A hidden-variable measure determines a metric \(D\) on \(S\), the triangle inequality being Bell's inequality.
openaire   +3 more sources

A variable geometry photofragment spectrometer

Journal of Physics E: Scientific Instruments, 1986
A new design of high resolution, variable geometry, pulsed supersonic molecular beam photofragment spectrometer is presented and its advantages over a perpendicular design are discussed. A detailed analysis of the centre-of-mass-laboratory kinematic transformations for arbitrary geometry is provided for a general centre-of-mass velocity distribution ...
N P Johnson, M D Barry, P A Gorry
openaire   +1 more source

Defined solid-angle counter with variable geometry

Applied Radiation and Isotopes, 2008
We describe a defined solid-angle counter for the standardization of radioactive sources of alpha-particle emitters. It has been built with the aim of combining good counting efficiencies, low uncertainties and flexibility of operation. The distance between source and detector can be changed in a continuous way with a precision guide and a ball screw ...
E, García-Toraño, T, Durán Ramiro, C, Burgos, M, Begoña Ahedo   +3 more
openaire   +2 more sources

Random Variables: Topology and Geometry

2020
We have already equipped the set of random variables defined on a given sample space with the structure of an ordered vector space. Once a probability measure is specified, one can define a family of norms, the so-called p-norms, on the space of random variables. One of these norms, namely the 2-norm, arises from an inner product.
Pablo Koch-Medina, Cosimo Munari
openaire   +1 more source

A variable geometry of enforcement?

Crime, Law and Social Change, 1995
This paper locates the control of fraud against the Community budget within the wider context of the tensions engendered by fiscal crises and successive enlargements of the European Union. Funds allocated to the Member States for agriculture, whether in the form of subventions or structural grants, take up more than half of total budget expenditure, so
openaire   +1 more source