7,650 research outputs found
Steven Johnson Author Talk Poster
No full textK-State Book NetworkA poster advertising an author talk by Steven Johnson at Kansas State University on September 3, 2014. Steven Johnson's book "The Ghost Map" was the 2014-2015 common book
A Comparative Study of the Spray Characteristics of Nanofluids and Spray Cooling Performance
Full text linkNanofluids are promising candidates for improving combustion performance through reducing emissions (as a fuel spray additive) or as spray coolants in various thermal management systems (by enhancing the surface heat transfer rate). In this study, experiments were conducted to compare the viscosity, free spray properties and the cooling performance of a water spray with an Alumina nanofluid spray prepared using an ultrasonic bath. A commercial, gasoline, port-fuel injector was used to spray Aluminum oxide nanoparticle solutions at a pressure of 3 bar (40-50 nm, 0, 0.01 and 0.07% by mass) onto a heated, smooth Aluminum surface, mimicking the geometry of a bowled engine piston. The temperature of the piston surface was varied in the range of 25-180 °C (above the Leidenfrost temperature). A Phase Doppler Anemometer was used to measure the droplet size and axial and radial velocity distributions at a series of points, with and without spray impingement. Incident and rebounding axial droplet velocities were recorded in the ranges of 4 to 7 ms-1 and -0.8 to 0.8 ms-1 respectively for all sprays. High-speed video observations showed that the approximate spray cone envelope angle was reduced from 26° to 19° with the addition of nanoparticles. The mean droplet diameter in the case of the nanofluids was consistently greater (generally between 10 and 30% for the 0.07% case) when compared to the water spray and evidenced by pooling and splashing on the piston surface. For the heated piston cases, the heat transfer effect was only enhanced in the case of the 0.07% mass concentration, resulting in a 15 °C reduction in surface temperature after 35 seconds when compared to the water case, decreasing from 165 to 110 °C at an injection frequency of 25 Hz and duration of 8 ms. A much smaller effect was observed in the central bowl location; approximately 3-5 °C after 20 seconds. The main boiling regimes were observed as the surface cooled. The transition to single-phase cooling occurred approximately 10 seconds earlier in the water case for the location directly under the impinging spray jet. The heat transfer rate showed a stronger correlation between droplet number count and droplet diameter at the surface in the case of the nanofluid compared to water. The deposition of a rough, solid film of Aluminum oxide on the piston surface at the point of spray impact was observed and considered to contribute to the enhanced heat transfer effect
Steven Bialer and Patti Smith, July 1978
No full textMusician, poet, and author Patti Smith sits on a bed in a hotel room in July 1978. The photograph was taken by Don Hamerman as part of a session for "Unicorn Times," an alternative performing arts periodical in Washington, D.C. Steven Bialer, the Design Director for "Unicorn Times," is seated on the bed next to Smith
Steven Garber
No full textSteven Garber speaks on the importance and value of truth.
Steven Garber is the principal of The Washington Institute for Faith, Vocation & Culture, which is focused on reframing the way people understand life, especially the meaning of vocation and the common good. A consultant to foundations, corporations and educational institutions, he is a teacher of many people in many places. The author of The Fabric of Faithfulness: Weaving Together Belief and Behavior, and Visions of Vocation: Common Grace for the Common Good, he is also a contributor to the books, Faith Goes to Work: Reflections from the Marketplace, and Get Up Off Your Knees: Preaching the U2 Catalogue. He lives with his wife Meg in Virginia
Steven Yedinak Interview
No full textLTC (RET) Steven M. Yedinak commissioned in the U. S. Army Infantry in 1963 and subsequently spent 26 years in Special Forces and Airborne Infantry. He served two combat tours in Vietnam (1966-67 & 1971-1972), and started the Mobile Guerrilla Force. He is the author of Hard to Forget: An American with the Mobile Guerrilla Force in Vietnam (Random House, 1998). He retired from the Army in 1989
Gamification is broken. An interview with Steven Poole
No full textSteven Poole is the author of Trigger Happy (2000. New York, NY: Arcade Publish), Unspeak (2006. New York, NY: Grove Press), and You Aren’t What You Eat (2012. In press). He has written extensively on books, culture, and videogames for The Guardian and other publications
Steven Pinker on language and thought
No full textEducação Superior::Linguística, Letras e Artes::LinguísticaThis video presents an exclusive preview of Steven Pinker's book: the stuff of thought. The author looks at language and how it expresses what goes on in our minds and how the words we choose communicate much more than we realize. For Steven Pinker, the brilliance of the mind lies in the way it uses just two processes to turn the finite building blocks of our language into infinite meanings. The first is metaphor: we take a concrete idea and use it as a stand-in for abstract thoughts. The second is combination: we combine ideas according to rules, like the syntactic rules of language, to create new thoughts out of old one
Steven Pinker on language and thought
No full textEducação Superior::Linguística, Letras e Artes::LinguísticaThis video presents an exclusive preview of Steven Pinker's book: the stuff of thought. The author looks at language and how it expresses what goes on in our minds and how the words we choose communicate much more than we realize. For Steven Pinker, the brilliance of the mind lies in the way it uses just two processes to turn the finite building blocks of our language into infinite meanings. The first is metaphor: we take a concrete idea and use it as a stand-in for abstract thoughts. The second is combination: we combine ideas according to rules, like the syntactic rules of language, to create new thoughts out of old one
Steven Pinker on language and thought
No full textEducação Superior::Linguística, Letras e Artes::LinguísticaThis video presents an exclusive preview of Steven Pinker's book: the stuff of thought. The author looks at language and how it expresses what goes on in our minds and how the words we choose communicate much more than we realize. For Steven Pinker, the brilliance of the mind lies in the way it uses just two processes to turn the finite building blocks of our language into infinite meanings. The first is metaphor: we take a concrete idea and use it as a stand-in for abstract thoughts. The second is combination: we combine ideas according to rules, like the syntactic rules of language, to create new thoughts out of old one
Steven Pinker on language and thought
No full textEducação Superior::Linguística, Letras e Artes::LinguísticaThis video presents an exclusive preview of Steven Pinker's book: the stuff of thought. The author looks at language and how it expresses what goes on in our minds and how the words we choose communicate much more than we realize. For Steven Pinker, the brilliance of the mind lies in the way it uses just two processes to turn the finite building blocks of our language into infinite meanings. The first is metaphor: we take a concrete idea and use it as a stand-in for abstract thoughts. The second is combination: we combine ideas according to rules, like the syntactic rules of language, to create new thoughts out of old one
- …
