The most obvious example is the calculus developed simultaneously by Leibniz and Isaac Newton. Another example is George Booles Boolean operators. Other examples have related specifically to philosophy, biology, or cognitive science. Maslows hierarchy of needs applies psychology to biology by using pure logic. Numerous psychologists, including Carl Jung and Sigmund Freud have developed systems which logically organize psychological domains, such as personalities, motivations, or intellect and desire. Often these domains consist of general categories following a corollary such as a theorem. Logic has been applied to categories such as taxonomy, ontology, assessment, and hierarchies. Strategic thinking
In 1988, military strategist, John A. Warden III introduced the Five Ring System model in his book, The Air Campaign, contending that any complex system could be broken down into five concentric rings. Each ring—Leadership, Processes, Infrastructure, Population and Action Units—could be used to isolate key elements of any system that needed change. The model was used effectively by Air Force planners in the First Gulf War. In the late 1990s, Warden applied his model to business strategy. See also
References
Bibliography
External links

Definitions of Systems and Models by Michael Pidwirny, 1999–2007. Publications with the title "System" (1600–2008) by Roland Müller. Definitionen von "System" (1572–2002) by Roland Müller, (most in German).
Penicillin-binding proteins are bacterial proteins that help to catalyze the last stages of peptidoglycan synthesis, which is needed to maintain the cell wall. They remove the D-alanine from the precursor of the peptidoglycan. The lack of synthesis causes the bacteria to lyse because they also continually break down their cell walls. Cefazolin is bactericidal, meaning it kills the bacteria rather than inhibiting their growth. Cost
Cefazolin is relatively inexpensive. Trade names
It was initially marketed by GlaxoSmithKline under the trade name Ancef.Other trade names include: Cefacidal, Cefamezin, Cefrina, Elzogram, Faxilen, Gramaxin, Kefol, Kefzol, Kefzolan, Kezolin, Novaporin, Reflin, Zinol, and Zolicef. References
External links
MedlinePlus Drug Information: Cefazolin Sodium Injection.