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A Conditional Constructive Logic for Access Control and Its Sequent Calculus,further well known access control axioms. The identification of canonical properties provides the possibility to craft access control logics that adopt . combination of axioms for which canonical properties exist.

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Cardiac Positron Emission Tomographyl perfusion imaging [3], as well as the routine availability of Rubidium-82 (Rb-82), has made cardiac PET an important tool in the detection and risk stratification of coronary artery disease. This chapter will discuss some of the technical differences between PET and SPECT cameras, particularly as