How to Celebrate Pi Day. Pi is a mathematical constant that is the ratio of a circle's circumference to its diameter, and it is also one of the most revered mathematical constants in the known world. Pi Day was first officially celebrated on a large scale in 1988 at the San Francisco Exploratorium. Since then, Pi Day has been celebrated by millions of students and math-lovers. The holiday is celebrated on 14th March, since 3, 1, and 4 are the three most significant digits in the decimal form of pi. If you'd like to learn how to celebrate pi in due fashion, read on and it will be as easy as pi.
Acute vs Chronic. The difference between acute and chronic when used for diseases is that acute means extremely severe pain, brief and dangerous disease whereas chronic refers to a medical condition that lasts over a long period. Chronic also means something always present and recurring or something habitual.
Chronic Disease Epidemiology (273) Involves the study of the distribution and determinants of chronic diseases and conditions in human populations and the application of that study to prevent and control these diseases and conditions. Contrast to Acute Diseases (273) That are characterized as severe and of short duration, a chronic disease tends to be less severe but of long and continuous duration. The pathologic change that occurs before clinical manifestation of chronic diseases is relatively long. This time is referred to as the latency period.