balancing of a mechanism
21Xylem — Multiple cross sections of a flowering plant stem showing primary and secondary xylem and phloem[1] Xylem is one of the two types of transport tissue in vascular plants. (Phloem is the other). The word xylem is derived from the Classical Greek… …
22Origin of avian flight — The Berlin Archaeopteryx, one of the earliest known birds. Evolution of flight redirects here. See also flying and gliding animals and insect flight. Around 350 BCE, Aristotle and other philosophers of the time were attempting to explain the… …
23international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …
24Adaptive quality of service — Quality of Service (QoS) Routing Protocols have become increasingly poplular and have numerous applications. One application in which it is extremely useful is in Ad Hoc networks. The United States Air Force is determining the best way to employ… …
25Conformational proofreading — is a general mechanism of molecular recognition systems, in which introducing a structural mismatch between a molecular recognizer and its target enhances the recognition specificity and quality. [1] [2] [3] [4] [5] …
26Hydronics — is the name for the use of water as the heat transfer medium in heating and cooling systems. Some of the oldest and most common examples are steam and hot water radiators. In large scale commercial buildings such as high rise and campus… …
27Intermittent power source — [ Erie Shores Wind Farm monthly output over a two year period] An intermittent power source is a source of electric power generation that may be uncontrollably variable or more intermittent than conventional power sources, and therefore non… …
28Segway PT — infobox title = caption = Rider on Segway i2 Personal Transporter label1 = Type data1 = Electric vehicle label2 = Wheels data2 = Two label3 = Inventor data3 = Dean KamenThe Segway PT is a two wheeled, self balancing electric vehicle invented by… …
29Lithium-ion battery — Batteries caption=Lithium ion battery of Varta, Museum Autovision, Altlußheim, Germany EtoW=160 Wh/kg EtoS=270 Wh/l PtoW=1800 W/kg CtoDE=99.9% [Cite web | title = BatteryUniversity.com: Charging lithium ion batteries | first = Isidor | last =… …
30List of Historic Mechanical Engineering Landmarks — The following is a list of Historic Mechanical Engineering Landmarks as designated by the American Society of Mechanical Engineers since it began the program in 1971. The designation is granted to existing artifacts or systems representing a… …
