Böcker av Walter Grassi

The text describes the main features of currently available heat pumps, focusing on system operation and interactions with external heat sources.

This book represents a journey through the history of science in regards to the concept of time, specifically, the question as to whether it is absolute, relative, or irreversible. The best-known contribution, or at least the most popular one, came from Einstein. He took the illusion that time was universal, a concept dating back, essentially, to Galileo and Newton, and shattered it, both within and without the scientific community. Thermodynamics teaches us that time has a preferential direction, i.e., forward, and is irreversible, as shown by Prigogine and his theories on dissipative structures and complex systems. Time is not only an ¿external spectator¿ to what happens, but assiduously takes part in making it happen. The concept of thermodynamics shows us how time is linked with environmental issues, as creator and destroyer. The author explores the relationships of cause and effect and how it can help in measuring the various eras of the planet, as wellas understanding the beings that inhabit it. This book will be a valuable read for students, researchers, and interested laypersons alike.

L'ecografia e utile nella valutazione di patologie articolari in pazienti con malattia reumatica e, oltre che nella diagnosi, e efficace nel monitoraggio con power Doppler della sinovite, con una sensibilita superiore rispetto all'esame clinico. L'ecografia ad alta risoluzione, integrata con la tecnica power Doppler, e anche in grado di individuare le anomalie entesopatiche, l'erosione ossea e il coinvolgimento del tendine. L'obiettivo dell'opera e di presentare la tecnica d'esame, i progressi ecografici nella patologia reumatica muscoloscheletrica e il ruolo diagnostico della ecografia nella patologia reumatica articolare. L'iconografia e arricchita con immagini integrate di ecografia, radiologia convenzionale, TC e RM.