This paper seeks conditions under which the solutions of the wave equations of classical physics with time-dependent coefficients and source terms have solutions which are stable in an average sense. Stability is sought in what in practice are the two senses of “energy” and “mean.” The equations for energy are taken as generalizations of the symmetric hyperbolic systems and for the mean sense as generalizations of the d'Alembert equation. It is seen, for example, that solutions have somewhat more stability in the mean for the most general type of system. A fact which makes our approach somewhat unique is that no space or time smoothness of coefficients is required for most of our results and the results are easily extended to domains with boundary with no particular conditions on the shape or boundedness of the domain.
Heart failure (HF) clinics have had an important role in optimal HF management and the effectiveness of these clinics has been studied intensively. A HF clinic is one of the various ways to organize a HF disease management program. There is good evidence that HF disease management can improve outcomes in HF patients, but it is Blazer Noir not clear what the optimal components of these programs are and what the relative effectiveness of Chaussure Nike Blazer Basse a HF clinic is compared with other forms of HF management. After initial positive reports on the effect of HF clinics, these clinics were implemented in many countries, although in different formats and of varying quality. In this article we describe the initial need for HF clinics, reflect on their development Blazer Nike Homme Solde over time, and discuss the role of HF clinics in context of the current need for HF disease management.
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