Here are three websites pertaining to shock diamonds that can be seen in the exhaust of jets afterburners. Also, attached are two you-tube videos that demonstrate the shock diamonds. http://www.aerospaceweb.org/question/propulsion/q0224.shtml http://en.wikipedia.org/wiki/Shock_diamond http://www.youtube.com/watch?v=KPxHXzd4iM0 http://www.youtube.com/watch?v=pnXBasZ3yBc http://library.lanl.gov/cgi-bin/getfile?00326958.pdf Carlee McClintic and Ryan Rader
Our topic was "Shape of electron orbitals in atoms." We had some experience with basic orbitals in Chemistry last semester. Basically, electrons repel each other and consequently electron orbitals repel each other. What we found on some other sites (wikipedia being the most helpful) is that a molecules position in space can be determined by the Shrodinger Equation, which gives the probability of an electron being at any given point and time. There were two different versions of this equation: a time dependent one and a time independent one, both of which are too complicated for us to type out, but can easily be found on Wikipedia. Here are some websites that be found that deal with this subject. Considering how fast electrons travel and their subatomic size, it is amazing to discover an equation capable of predicting electron location. http://en.wikipedia.org/wiki/Schrödinger_equation http://images.google.com/imgres?imgurl=http://winter.group.shef.ac.uk /orbitron/images/noflash.gif&imgrefurl=http://winter.group.shef.ac.uk /orbitron/AOs/3p/index.html&h=360&w=480&sz=2&hl=en&start=4&um=1 &tbnid=4lSEuVjBLg4RIM:&tbnh=97&tbnw=129&prev=/images%3Fq%3Delectron %2Borbitals%2Bwave%2Bequation%26ndsp%3D18%26um%3D1%26hl%3Den%26sa%3DN http://winter.group.shef.ac.uk/orbitron/AOs/3p/index.html http://images.google.com/imgres?imgurl= http://www.meta-synthesis.com/webbook/30_timeline/stm.gif&imgrefurl= http://www.meta-synthesis.com/webbook/30_timeline/timeline.html &h=429&w=600&sz=106&hl=en&start=7&tbnid=zl3tFguEPnIXvM:&tbnh=97 Corwin Stout and Rory Gallup
Subject Graphic Equalizers URL's http://en.wikipedia.org/wiki/Graphic_equalizer http://www.rane.com/note101.html http://www.ehow.com/how_2211288_set-up-graphic-equalizer.html? ref=fuel&utm_source=yahoo&utm_medium=ssp&utm_campaign=yssp_art (a)This topic is important because a graphic equalizer is a tool that can adjust the intensity of certain frequencies in compared to others to make up for anomalies within the room that may cause certain frequencies to sound weak or distorted. (b)The first URL is a wikipedia page that gives a good background on in general what equalization is. The second URL is by far the best one when it comes to describing the types of equalizers and more specifically graphic equalizers. The final URL was good mainly for the paragraph at the top of the page describing the basic function that an equalizer would serve in a normal environment. Nick Smith, Adam K
The topic we were assigned was digital audio/sound. The information was found at the following http URLs: http://entertainment.howstuffworks.com/movie-sound4.htm http://en.wikipedia.org/wiki/Digital_audio Digital audio is the process of sending sound digitally. The sound wave is approximated using right hand end points, similar to approximating an integral by right hand end points. These approximations would be done using the wave equation or a variation of the wave equation. After this is done, the information is then sent through digital means. The digital information arrives and is transformed back into sound. Digital audio/sound basically uses a computer program to transform sound waves into digital information. This is significant because the sound waves can be reconstructed years later. If only we had a recording of Newtons or Einsteins thoughts. How amazing would that be? Jessica Hartl John Stscherban
Subject Carnegie Hall Group www.rpginc.com/news/library/inter_science_reviews.pdf http://www.giles.com/yamaha1/pressreleases/ProAudio/carnegiePM1D.htm With how much time we spent on the various sound waves produced by various instruments, the science and principles behind the acoustics of concert halls is both interesting and significant. Also, since I don't forsee concerts ever going out of style, the mechanics behind good acoustics is very important, with Carnegie Hall being one of the best examples. The first website gives information about sound diffusing techniques in various concert halls. Carnegie hall has diffusers that disperse the sound waves that hit the back wall to avoid echoes and to avoid acoustic energy loss. This is more on general acoustic techniques rather than Carnegie Hall specifically. The second website touches on the nuances of electrical sound systems coinciding with natural acoustics. This introduces the technology involved in such operations as well. Matt Vader and Jake Skarbek
Here are the web site you requested for the HNRS 2900 Wave project the topic we chose was "Pictures of Vibrating Drumheads" This first site has a lot of basic information about what is going on and little animated gif images that model what is being described. http://www.kettering.edu/~drussell/Demos/MembraneCircle/Circle.html The second site we found is report from the UIUC about not only the vibrations of drum heads but also goes on to other instruments like a cymbal, bell, guitar, and others. It shows pictures of the nodes outlined by salt on some black background. http://online.physics.uiuc.edu/courses/phys199pom/Lecture_Notes/P199POM_Lect4_Ch4_Part2.pdf This third site is a neat video from ebaums world showing a plate vibrating at different frequencies and the node outlined with salt. It's pretty cool. http://www.ebaumsworld.com/video/watch/10800/ This site is a lot of fun, it's a virtual model of a drum head that you can view and manipulate in all sorts of interesting ways by adjusting the view, possible frequencies, dampening, etc. http://www.falstad.com/circosc/ This final site is more mathematical than the rest, talking about the bessel functions but there are also some neat little pictures to go with. http://oak.ucc.nau.edu/jws8/dpgraph/drumheads.html That all, Carter Cole and Cody Westra
From: Lee E Edgerton Nichole and I did looked up things for the Tacoma Narrows Bridge. We both thought it was very interesting to see how much like curves it resembled at times, and how much it swayed! I'm sorry I have sent this to you late, I didn't have internet access last night, and it was not Nichole's fault. I hope you will still be able to use the information on time though. http://en.wikipedia.org/wiki/Tacoma_Narrows_Bridge -This site includes information on the Tacoma Narrows Bridge as well as some good photographs of it swaying due to wind. http://www.enm.bris.ac.uk/anm/tacoma/tacoma.html -This site has details on the collapse of the bridge as well as quite a few pictures and a video clip. http://www.youtube.com/watch?v=P0Fi1VcbpAI -This is a video, but it includes some incredible footage of the bridge swaying ALOT and even parts of it when it collapsed. Hopefully it will be useful.
Last Update: 17 April 2008 Thursday.