Relay For Life

Relay For Life is a community based fundraising event of the American Cancer Society. Each year, more than 5,000 Relay For Life events take place in over twenty countries. Events are held in local communities, campus universities and in virtual worlds. As the American Cancer Society's most successful fundraiser and the organization's signature event, the mission of Relay For Life is to raise funds to improve cancer survival, decrease the incidence of cancer, and improve the quality of life for cancer patients and their caretakers.

A Relay For Life event is organized under a volunteer Relay Committee, and implemented by volunteers. It is often organized as a multi-day public gathering, spanning all day and night in a large outdoor space, and many people bring tents and camp out around the walking tracks. Currently, almost 4 million people take part in Relay events in over 5,000 communities in the United States.

It is estimated that Relay For Life events have raised nearly $5 billion to date. The first team to raise over $1 million was the Rosebud Miners. The largest virtual fundraising event is Relay For Life of Second Life, which has raised more than $2,000,000 since 2005.

For Life

For Life may refer to:

Relay

A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits as amplifiers: they repeated the signal coming in from one circuit and re-transmitted it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.

A type of relay that can handle the high power required to directly control an electric motor or other loads is called a contactor. Solid-state relays control power circuits with no moving parts, instead using a semiconductor device to perform switching. Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults; in modern electric power systems these functions are performed by digital instruments still called "protective relays".

Life

Life is a characteristic distinguishing physical entities having biological processes (such as signaling and self-sustaining processes) from those that do not, either because such functions have ceased (death), or because they lack such functions and are classified as inanimate. Various forms of life exist such as plants, animals, fungi, protists, archaea, and bacteria. The criteria can at times be ambiguous and may or may not define viruses, viroids or potential artificial life as living. Biology is the primary science concerned with the study of life, although many other sciences are involved.

Throughout history there have been many theories about life including materialism, hylomorphism and vitalism. Even today it is a challenge for scientists and philosophers to define life. The smallest contiguous unit of life is called an organism. Organisms are composed of one or more cells, undergo metabolism, maintain homeostasis, can grow, respond to stimuli, reproduce (either sexually or asexually) and, through evolution, adapt to their environment in successive generations. A diverse array of living organisms can be found in the biosphere of Earth, and the properties common to these organisms are a carbon- and water-based cellular form with complex organization and heritable genetic information.