ii FOREWORD The Center for Devices and Radiological Health (CDRH) of the Food and Drug Administration (FDA) develops and implements national programs and regulations to protect the public health in the fields of medical devices and radiological health. These programs are intended to insure the safety, effectiveness, and proper labeling of medical and… (More)
The Sivers mechanism for the single-spin asymmetry in unpolarized lepton scattering from a transversely polarized nucleon is driven by the orbital angular momentum carried by its quark and gluon constituents, combined with QCD final-state interactions. Both quark and gluon mechanisms can generate such a single-spin asymmetry, though only the quark mechanism… (More)
The U.S. Food and Drug Administration (FDA) attempts to identify and understand new risks associated with medical device use; communicate information and recommendations to device users; help manage known risks by providing strategies to facilitate safe use; guide manufacturers to improve design, labeling, and training to address known risks; and guide… (More)
IntroductIon Negotiation skills play a critical role for today's knowledge workers. Therefore, the need for university students to develop negotiation and problem-solving skills grows more important each year. Concurrently, the need for students to understand and work with computers continues to grow. This paper presents the exploratory results of using a… (More)
The existence of dark matter is inferred through its gravitational interactions [1, 2, 3], though to discover its nature we must probe it by other means. Here we consider how the properties of light can be modified through interactions with dark matter. The dark-matter candidates of particle physics invariably possess electromagnetic interactions, if only… (More)
If dark matter consists of cold, neutral particles with a nonzero magnetic moment, then, in the presence of an external magnetic field, a measurable gyromagnetic Faraday effect becomes possible. This enables direct constraints on the nature and distribution of such dark matter through detailed measurements of the polarization and temperature of the… (More)
We consider radiative β-decay of the neutron in heavy baryon chiral perturbation theory. Nucleon-structure effects not encoded in the weak coupling constants gA and gV are determined at next-to-leading order in the chiral expansion, and enter at the [Formula: see text]-level, making a sensitive test of the Dirac structure of the weak currents possible.