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Measurement is the process which provides us quantitative facts where as metrics are used for measurement by representing quantities and qualities quantitatively. Developing metrics for ontologies facilitates in making managerial decision while developing semantic web applications. Social information can also be represented in form of ontologies which give birth to Virtual Semantic Social Networks (VSSN) containing information about several people, their friends, interests, likings and disliking. Moreover Virtual Semantic Social Networks provide virtual semantic community to people for...

Air abrasion technique has been in use since 1940s. It lost its popularity against the traditional dental drill as amalgam was the most popular restorative material then and air abrasion lacked the ability to prepare cavity margins accurately. With the emergence of Minimal intervention philosophy and introduction of adhesive restorative dental materials, air abrasion has experienced a rebirth. Air abrasion works on the principle of kinetic energy and utilizes alumina particles to abrade the surface. Alumina particles are effective in cutting but could be toxic if inhaled. Therefore this...

The recognition of B-type natriuretic peptide (BNP) and N- terminal prohormone B-type natriuretic peptide (NT-proBNP) as markers for the diagnosis, prognosis and management of heart failure has been a major breakthrough in the field of medicine. A head to head comparison of the two heart failure markers is discussed in this book to understand its clinical utility in patients with impaired kidney function. While it is known that both BNP and NT-proBNP have a place in the diagnosis, prognosis, and management of heart failure, the two molecules are not identical. Differences that may have...