Reaction wheels are useful things, typically used by satellites to keep themselves oriented the right way up in space. Turning the reaction wheel creates an equal and opposite torque in the spacecraft ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

Aaron Hankin is currently working for Dow Jones MarketWatch. He has 10+ years of professional experience in the financial markets. The U.S. economy seems to be doing fine. Growth, for the most part ...

Abstract: An inverted, or flipped, classroom, where content delivery includes video lectures watched outside of the classroom, is a method that can free classroom time for learner-centered activities ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Yarilet Perez is an experienced multimedia journalist and fact-checker with a Master of ...

U.S. Bureau of Reclamation announced last week that the the first sections of the 90-inch replacement pipe for the St. Mary Siphon had arrived, marking a major milestone of the extensive project to ...

Abstract: For 3D walking control of a biped robot we analyze the dynamics of a 3D inverted pendulum in which motion is constrained to move along an arbitrarily defined plane. This analysis yields a ...

Developed from the DB-600 engine first produced in November 1937, the DB-600 series was used primarily in Messerschmitt Bf 109 and Bf 110 fighters. In 1939, a Messerschmitt 209V1, using a DB-605ARJ ...

Entropion is a condition where the eyelid turns inward, causing irritation. Most people with entropion need surgery to fix it. Age-related entropion is the most common and happens as eyelid muscles ...