Aerodynamics is a branch of fluid dynamics concerned with the study of forces and gas flows. The solution of an aerodynamic problem normally involves calculating for various properties of the flow, such as velocity, pressure, density, and temperature, as a function of space and time. Understanding the flow pattern makes it possible to calculate or approximate the forces and moments acting on bodies in the flow. This mathematical analysis and empirical approximation form the scientific basis for heavier-than-air flight.
Aerodynamic problems can be classified in a number of ways. The flow environment defines the first classification criterion. External aerodynamics is the study of flow around solid objects of various shapes. Evaluating the lift and drag on an airplane, the shock waves that form in front of the nose of a rocket or the flow of air over a hard drive head are examples of external aerodynamics. Internal aerodynamics is the study of flow through passages in solid objects. For instance, internal aerodynamics encompasses the study of the airflow through a jet engine or through an air conditioning pipe.
AT&T’s Rivals Are Happy to Attack Over iPhone’s Network Woes Fri, 29 Aug 2008 07:19:16 -0000 The debut of Apple’s iPhone 3G cellphones has been a public relations headache for AT&T, after complaints of dropped calls and poor network connections.
Bits: Does Silicon Valley Face an Innovation Crisis? Fri, 29 Aug 2008 06:38:12 -0000 Judy Estrin, a serial technology entrepreneur, says in a new book that Silicon Valley — and the country — are facing a crisis of innovation.
Advertising: Cable, Quietly, Introduces an Anytime Elections Channel Fri, 29 Aug 2008 07:39:02 -0000 The cable industry has introduced an experimental political channel that gives advertisers a uniform way to buy time and measure the number of people watching.
Results at Novell Are Better Than Expected Fri, 29 Aug 2008 07:25:58 -0000 The business software maker Novell posted a quarterly loss but its results were better than expected, helped by an increase in sales of Linux software.
Dell’s Profit Drop Surprises Investors Fri, 29 Aug 2008 07:23:12 -0000 Dell stunned investors with a 17 percent decline in quarterly profit and a warning that a slowdown in technology spending in the United States had begun to spread to Asia and Europe.
Industry Rethinks Moneymaking Software Practice Thu, 28 Aug 2008 16:32:09 -0000 Before they ship PCs to retailers like Best Buy, computer makers get paid hundreds of millions of dollars to load them up with lots of free software. For $30, Best Buy will get rid of it for you.
NerdTV | PBS
NerdTV #13: Judy Estrin
Mon, 10 Apr 2006 12:00:00 -0700
Judy Estrin's career ranges from founder of Bridge Communications to CTO of Cisco to running Packet Design LLC. Quite the girl geek, eh?Download video:Entire Show:MPEG-4 | TorrentNerdy Bit:MPEG-4 | TorrentJuicy Bit:MPEG-4 | TorrentDownload subtitled video:Entire Show:With Subtitles | Torrent w/ SubtitlesNerdy Bit:With Subtitles | Torrent w/ SubtitlesJuicy Bit:With Subtitles | Torrent w/ SubtitlesDownload audio:Entire Show:MP3 | TorrentAAC | TorrentOgg Vorbis | Torrent
NerdTV #13: Judy Estrin - Transcript
Mon, 10 Apr 2006 12:00:00 -0700
For those who would rather read than watch or listen.
NerdTV Archives
Mon, 10 Apr 2006 12:00:00 -0700
Miss a past show? Check out our archives.Past guests include:#12: Bob KahnInventor of TCP/IP.#11: Doug EngelbartComputer mouse inventor.#10: Dan BricklinInventor of the Spreadsheet#9: AninaHigh Fashion Meets High Tech#8: Avram MillerCo-founder of Intel Capital#7: Dan DrakeCo-founder of Autodesk#6: Dave WinerFather of RSS and Web Logging#5: Tim O'ReillyOpen Source pioneer#4: Brewster KahleInternet Archive founder#3: Bill JoyCo-founder of Sun#2: Max LevchinCo-founder of PayPal#1: Andy HertzfeldThe first Macintosh programmer...ever
Reuters: Technology News
Microsoft to buy ciao.com price comparison firm Fri, 29 Aug 2008 05:22:27 -0400 LONDON (Reuters) - Microsoft has agreed to buy Greenfield Online, owner of European price comparison website ciao.com, for about $486 million to boost its Internet search and e-commerce business in Europe.
HP says wins judgment against Pelikan Thu, 28 Aug 2008 19:08:52 -0400 NEW YORK (Reuters) - Hewlett-Packard Co said on Thursday a German court has found Pelikan Hardcopy to be in violation of laws on unfair competition.
GeoEye signs deal to provide imagery to Google Fri, 29 Aug 2008 05:10:03 -0400 WASHINGTON (Reuters) - GeoEye Inc on Thursday said it will provide imagery from its new $502 million high-resolution GeoEye-1 satellite to Google Earth and Google Maps after the spacecraft is launched on September 4.
AP Top Technology News At 7:06 a.m. EDT
Even critics give Apple a pass on iPhone 3G woes By JESSICA MINTZ Thu, 28 Aug 2008 20:29:18 -0000 First an iPhone price cut left early buyers feeling foolish, and then came reports that some iPods were spitting sparks. Now the new iPhone 3G has been marred by bugs, spotty service, disappearing programs for the device and a veil of secrecy over software developers trying to broaden its appeal.... Small GPS devices help prosecutors win convictions By MITCH STACY Thu, 28 Aug 2008 20:16:55 -0000 Like millions of motorists, Eric Hanson used a GPS unit in his Chevrolet TrailBlazer to find his way around. He probably didn't expect that prosecutors would eventually use it too - to help convict him of killing four family members.... Dell 2Q profit drops, hurt by PC price cuts By JESSICA MINTZ Fri, 29 Aug 2008 11:10:47 -0000 Computer maker Dell Inc. said Thursday its fiscal second-quarter profit fell 17 percent, hurt in part by PC price cuts. Both earnings and margins fell short of Wall Street estimates, and Dell shares plunged....
Advanced Topics in Aerodynamics - Electronic media about Aerodynamics, Aeronautics, Propulsion Systems, and Related Technology.
Aerodynamics for Students - A web textbook from the University of Sydney that covers undergraduate-level aerodynamics, fluid dynamics, aircraft performance and propulsion. Investigates the significance of pressure distribution on an aerodynamic body and the estimation of lift, drag and pitching moment of an aerofoil from the pressure around it in flight.
Meta Description: [ Aerodynamics for Students ]
Aerodynamics in Plain English - A collection of 17 articles, for sale by the author, that explain the basic concepts in aerodynamics for students in k-12 and college.
Meta Description: [ Computational Fluid Dynamics, CFD , Software and Consulting for Engineers. ]
Airfoils by Chris Heintz - A textbook that discusses airfoil aerodynamics as applied to STOL aircraft.
Meta Description: [ All-metal aircraft construction, riveting. (Part 1 of 2) ]
Beginner's Guide to Aeronautics - Prepared at NASA Glenn by the Learning Technologies Project (LTP) to provide background information on basic aerodynamics and propulsion for secondary math and science teachers. Includes interactive animated illustrations of many concepts.
500Langley Technical Reports Server (LTRS) - Searchable collection of over 2,000 aerodynamic and aerospace related technical papers. The full-text papers are available as either PDF or Postscript files.
Mark Ketchum's Bridge Aerodynamics Page - A discussion of bridge aerodynamics, with particular emphasis on suspension bridges and the Tacoma Narrows disaster of 1940.
Meta Description: [ A discussion of bridge aerodynamics, with particular emphasis on suspension bridges and the Tacoma Narrows disaster of 1940. ]
Principles of Aeronautics - An online textbook discussing the basics of flight, drag and lift with content and lesson plans appropriate to all educational levels.
The K-8 Aeronautics Internet Textbook - Learning resources for aeronautics including an online textbook, lesson plans, interactive activities, curriculum bridges to other subjects.
Meta Description: [ Learning resources for teachers, students, and enthusiasts
interested in aeronautics including an online textbook,
lesson plans, interactive activities, curriculum bridges
to other subjects. ]
attention to aerodynamics, trying to create as much downforce as possible while keeping air resistance low in order. The ...