Search results
Results from the WOW.Com Content Network
Willis Whitfield (December 6, 1919 – November 12, 2012 [1] [2]) was an American physicist and inventor of the modern cleanroom, a room with a low level of pollutants used in manufacturing or scientific research. His invention earned him the nickname, "Mr. Clean," from Time Magazine. [3] [4]
A cleanroom or clean room is an engineered space that maintains a very low concentration of airborne particulates. It is well isolated, well controlled from contamination , and actively cleansed. Such rooms are commonly needed for scientific research and in industrial production for all nanoscale processes, such as semiconductor manufacturing.
The cleanroom software engineering process is a software development process intended to produce software with a certifiable level of reliability. The central principles are software development based on formal methods, incremental implementation under statistical quality control, and statistically sound testing.
Repertoire of contention refers, in social movement theory, to the set of various protest-related tools and actions available to a movement or related organization in a given time frame. [1] [2] The historian Charles Tilly, who brought the concept into common usage, also referred to the "repertoire of collective action." [3]
The common definition of the modern period today is often associated with events like the French Revolution, the Industrial Revolution, and the transition to nationalism towards the liberal international order. The modern period has been a period of significant development in the fields of science, politics, warfare, and technology.
For health reasons it is crucial to breathe clean air, free from chemicals and toxicants as much as possible. It is estimated that humans spend approximately 90% of their lifetime indoors [8] and that indoor air pollution in some places can be much worse than that of the ambient air.
[1] [2] The high modernist movement was particularly prevalent during the Cold War, especially in the late 1950s and 1960s. The St. Louis Gateway Arch, an iconic symbol of high modernity and its outlook, along with its modern urban planning project of a surrounding large park and car centric infrastructure.
American modernism, much like the modernism movement in general, is a trend of philosophical thought arising from the widespread changes in culture and society in the age of modernity. American modernism is an artistic and cultural movement in the United States beginning at the turn of the 20th century, with a core period between World War I ...