Ford Motor Company

About: Ford Motor Company is a company organization based out in Dearborn, Michigan, United States. It is known for research contribution in the topics: Internal combustion engine & Signal. The organization has 36123 authors who have published 51450 publications receiving 855200 citations. The organization is also known as: Ford Motor & Ford Motor Corporation.

Examination of subchondral bone architecture in experimental osteoarthritis by microscopic computed axial tomography

Abstract: Subchondral bone changes have been proposed as an early event in the pathogenesis of osteoarthritis. In this study, microscopic computed axial tomography was used to evaluate the subchondral bone structure in femoral heads from a guinea pig model of osteoarthritis. Examination of trabecular bone within the femoral head showed a highly significant increase in bone fraction in the experimental animals. This was due to the development of trabeculae that were thicker and closer together. We conclude that trabecular remodeling may be an early event in this model of osteoarthritis.

Temperature and Magnetic-Field Dependence of the Antiferromagnetism in Pure Chromium

Abstract: The results of neutron-diffraction experiments on the temperature and magnetic-field dependence of the antiferromagnetism in pure chromium are presented. A comparison with previously published temperature-dependence data is given. Temperature hysteresis is generally observed due to the temperature dependence of the magnetic domain structure. Relatively small magnetic fields are found to be sufficient to rotate the polarization associated with a given wave vector. A simple model is proposed, based on thermal fluctuations of polarization of the antiferromagnetic domains as a whole, which explains the magnetic-field effects found in this study and the torque-magnetometer measurements of Montalvo and Marcus. This model accounts for effects on chromium of cooling in a magnetic field.

Load–compression behavior of flexible foams

Abstract: The load-compression behavior of a foam reflects its geometric structure and the physical properties of the matrix polymer. Quantitative relations between these parameters have been established in the present study. Based on both theoretical analyses and experimental data obtained on a flexible polyurethane foam, it is shown that the compressive stress can be factored into the product of two terms: (1) a dimensionless function of the compressive strain, ψ(e), calculated from experimental load-compression data and reflecting the buckling of the foam matrix; and (2) a factor, eEƒ, where Eƒ is the apparent Young's modulus of the foam (which is a function primarily of the modulus of the base polymer E0 and of the volume fraction of polymer, φ). Thus the compressive stress behavior of a foamed polymer is determined by E0, φ, and the matrix geometry, the latter described by the function ψ(e). Using these established relations, it now is possible to delineate precisely the structural features a foam mus...