In this paper we discuss the stability and instability properties of two classes of conservative dynamical systems which have two interconnected components: a nite-dimensional and an innnite-dimensional subsystem. The nite-dimensional component is a linear mechanical system with gyroscopic terms and it is coupled to a wave equation deened on an innnite spatial domain via two diierent types of c...

1.0 Introduction ........................................................................................................................................ 2 2.0 Radiation Hardness Assurance Overview .......................................................................................... 2 3.0 Define the Space Radiation Environment ..................................................................

A comprehensive review isn preparation of a diverse class of electromagnetic radiation processes, which may occur in atomic systems, crystal lattices, and e ergetic lectron beams interacting with uniform or pe iodic electric and magnetic fields. We present an i troduction to his review, in the form of a survey of various fundamental electromagnetic radiation processes, from both the classical a...

We have studied the UV radiation in the range 180 to 330 nm emitted by several stars with planetary systems, in order to determine the constraints on the habitable zones posed by the radiation levels. The observations were taken from the International Ultraviolet Explorer (IUE) and the Hubble Space Telescope (HST) satellites database. The stellar sample was chosen to cover the range of what are...

A quasi-classical method is developed to calculate the radiation damping of a relativistic particle in a straight, continuous focusing system. In one limiting case where the pitch angle of the particle θp is much larger than the radiation opening angle 1/γ , the radiation power spectrum is similar to synchrotron radiation and the relative damping rate of the transverse action is proportional to...

In the past 10 years, techniques to improve radiotherapy delivery, such as intensity-modulated radiation therapy (IMRT), image-guided radiation therapy (IGRT) for both inter- and intrafraction tumor localization, and hypofractionated delivery techniques such as stereotactic body radiation therapy (SBRT), have evolved tremendously. This review article focuses on only one part of that evolution, ...

In cold molecular clouds submillimetre emission lines are excited by the ambient radiation field. The pumping is dominated by the cosmic microwave background (CMB). It is usual in molecular line radiative transfer modelling to simply assume that this is the only incident radiation field. In this paper, a molecular line transport code and a dust radiative transfer code are used to explore the ef...