Geometry.Net - Science: Sonoluminescence


Home - Science - Sonoluminescence

e99.com Bookstore

Images

Newsgroups

61-80 of 99 Back | 1 | 2 | 3 | 4 | 5 | Next 20

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Sonoluminescence: more detail

Sonoluminescence by F. Ronald Young, 2004-08-30

Shock Focussing Effect in Medical Science and Sonoluminescence

Sonoluminescence: An entry from Thomson Gale's <i>Gale Encyclopedia of Science, 3rd ed.</i>

Sonochemistry and Sonoluminescence (NATO Science Series C: (closed))

Confusion about fusion. (Science Observer). : An article from: American Scientist by David Schneider, 2002-09-01

Cavitation by F. Ronald Young, 1989-09

Sonochemistry and Cavitation by MARGULIS, 1995-11-01

Nonlinear Acoustics at the turn of the Millennium: ISNA 15, 15th International Symposium, GÃ¶ttingen, Germany 1-4 September 1999 (AIP Conference Proceedings)

lists with details

Sonoluminescence
sonoluminescence. sonoluminescence is the process of converting soundinto light. There are two types of sonoluminescence, Multiple
http://laser.physics.sunysb.edu/~ken/simons/simonsp3.html

Extractions: Sonoluminescence is the process of converting sound into light. There are two types of sonoluminescence, Multiple Bubble Sonoluminesence (MBSL) and Single Bubble Sonoluminescence (SBSL). In order to perform sonoluminescence, a flask full of water or whatever medium is connected to two piezoelectric transducers (used to amplify sound). The amplifiers feed into the transducers which then start emitting a very concentrated amount of sound, usually around 20-35 Khz. At this point in time, bubbles begin to form, dubbed as "cavitation bubbles." Once a cavitation bubble is captured in the middle of the flask, it is under the effects of the amplified sound. At a certain resonance point, the bubble begins to emit flashes of white light.
Fernando Enrique Ziegler - Sonoluminescence
Experiments and Projects. SingleBubble sonoluminescence Abstract; REUPaper (Under Construction); REU Final Presentation (Under Construction);
http://laser.physics.sunysb.edu/~ziggy/report/
NSF - OLPA - PR 02-63: LIGHT FROM GAS BUBBLES: SONOLUMINESCENCE MEASURED
(703) 2924967. mclarke@nsf.gov. Light From Gas Bubbles sonoluminescence Measured. Thisphenomenon, called sonoluminescence, has been observed for decades.
http://www.nsf.gov/od/lpa/news/02/pr0263.htm

Extractions: NSF PR 02-63 - July 24, 2002 Media contact: Amber Jones aljones@nsf.gov Program contact: Michael Clarke mclarke@nsf.gov A cloud of gas bubbles in a liquid excited by ultrasound (generated by a titanium rod vibrating 20,000 times a second) can emit flashes of light (sonoluminescence) due to extreme temperatures inside the bubbles as they collapse.
Chain Reaction Commentary On Sonoluminescence
C O M M E N A R Y C O M M E N A R Y, Chain Reaction and sonoluminescence You need Netscape! Do you want a furnace that burns water?
http://www.isn.net/~deighanj/sono.html

Extractions: I have not as of yet, see last updated at bottom. But I have seen the previews and was interested enough to visit the CHAIN REACTION WWW SITE WOW!! The stuff you can do with MacroMedia. You will notice I use a lot of their Power Applets on my sites. But I haven't gone all out multimedia. Visit them at http://www.macromedia.com/ First, I am not going to explain sonoluminescence, to get varied descriptions and up to date info do a search on "Open Text Index" , which seems to produce more hits than any of the others. What I would like to discuss is a furnace that burns water. Those of you who don't believe water burns can leave the room now. The rest can read on. For twenty years I've hinted that water burns, I have based this assumption on observation of historical and other events I've witnessed over my lifetime. I have pursued military research into water based weapons systems, human spontaneous combustion, cold fusion and the car that runs on water. There is tons of research into alternate fuels including prototype vehicles using hydrogen conversion. I don't get into the technical stuff, I'm not a scientist or engineer, all I want is a furnace that runs on water, which produces heat and electricity, so I can keep some of my pay check to spend on my family.
Sonoluminescence And Fusion
The important subject in this case is sonoluminescence, the emission of pulses ofblue light from the collapse of air bubbles in a liquid that has been excited
http://www.21stcenturysciencetech.com/articles/sonolum.html

Extractions: March 5 Evidence showing that nuclear fusion can occur in a beaker of liquid excited by sound waves, has produced a new flurry of press activity reminiscent of that around the 1989 announcement by Pons and Fleischmann that they had achieved fusion in an electrochemical cell. The new evidence, reporting on experiments by a team at Oak Ridge National Laboratory, is reported in an March 8, 2002 article in Science magazine that was released yesterday. As then, the prevailing popular delusions about what science is dominate the discussion, even by the scientists themselves. As the announcment of the 1989 cold fusion anomaly came under attack from lying establishment physicists, discussion unfortunately, degenerated into practical arguments over whether or not, and how soon, a cold-fusion cell in every basement could replace the gas furnace or oil burner. Whether the results announced in the 8 March Science article, ``Evidence for Nuclear Emissions During Acoustic Cavitation,'' prove sound or not, we are reminded again that scientific progress can result only from the posing and resolution of true paradoxes in the mind of an experimental investigator. The important subject in this case is sonoluminescence, the emission of pulses of blue light from the collapse of air bubbles in a liquid that has been excited by sound waves, first studied in Germany in 1934. How a light wave could be produced by a sound wave was the unsolved paradox. In the Oak Ridge experiments, the hydrogen in acetone (C-3 H-6 O), the principal ingredient in nail polish remover, is replaced by the heavier deuterium isotope. Sound waves are passed through the liquid at the same time as a pulse of high energy neutrons. It is hypothesized that the acoustic bubbles which form, then collapse so fast that not only is light produced, but the deuterium is somehow caused to undergo nuclear fusion. The evidence for this is in the excess of neutrons and tritium, a heavier isotope of hydrogen, detected in the solution. The amounts are very small, however, and the existence of the effect is being challenged.
Sonoluminescence Innovations And Patents
sonoluminescence Innovations and Patents © 2002 Dialysis. More informationon sonoluminescence and sonoluminescence Research References.
http://www.air.xq23.com/energy_science_resources/Sonoluminescence.html
Sonoluminescence -- From Eric Weisstein's World Of Physics
sonoluminescence, The production of a flash of light accompanying the burstingof a bubble. References. Crum, L. A. sonoluminescence. Physics Today, Sept.
http://scienceworld.wolfram.com/physics/Sonoluminescence.html

Extractions: References Crum, L. A. "Sonoluminescence." Physics Today, Sept. 1994, pp. 22-29. Crum, L. A. and Roy, R. A. "Sonoluminescence." Science Hiller, R. et al. "Effect of Noble Gas Doping in Singe-Bubble Sonoluminescence." Science van Warren, L. "The Virtual Sonoluminescence Symposium." http://www.wdv.com/Notebook/Sono/
Teachspin - Sonoluminescence
sonoluminescence. sonoluminescence is the production of light fromsound. This effect, discovered just over ten years ago, has been
http://www.teachspin.com/products/sonoluminescence/

Extractions: The bubble collapse is so violent that some predicted theoretical accelerations are larger than those associated with a Black Hole! The actual emission mechanism has not yet been explained, although theories are as plentiful as they are diverse. Students begin their exploration by first understanding some basic acoustical principles, such as resonance behavior, quality factors, variation of sound speed with temperature, and the eigenmode structure of a 3-dimensional resonance "cavity." Once these principles are understood there are a large number of experiments that can be performed focusing on the liquid sample preparation and the light emitted from the bubble. The Instrument
The Search For Sonoluminescence
The Search for sonoluminescence. The following describes my attempt to producesonoluminescence as guided by an article published in Scientific American.
http://webphysics.davidson.edu/alumni/AnOdell/exp/sono/exper.htm
Single Bubble Sonoluminescence
Single Bubble sonoluminescence. Abstract This is called multi bubblesonoluminescence (MBSL), and is exhibited by a variety of liquids.
http://www.uberhip.com/people/godber/research/sbsl.html

Extractions: Bubbles of air in a liquid medium can experience a rapid series of expansions and contractions when exposed to high frequency sound at high levels of intensity. If the intensity is within a certain range the bubbles will begin to emit a faint blue light, due to phenomena as of yet unexplained. This is called multi bubble sonoluminescence (MBSL), and is exhibited by a variety of liquids. If the same procedure is repeated in water in which the dissolved gas has been removed, and a bubble is introduced into the system, similar results will be produced. This single bubble sonoluminescence (SBSL) allows a closer study of the phenomenon because the isolated bubble can be studied without the interference from other bubbles. The light emitted by this single bubble has proven, in fact, to be a rapid flashing. Each flash coincides with the collapse in the radius of the bubble, and is very consistent in the length between flashes and the duration of each flash. At this point we are merely interested in reproducing SBSL. If it proves that we can do this we may develop our investigation further.
Reprobus: Sonoluminescence
reprobus sonoluminescence. reprobus sonoluminescence (SelfReleased- 1999) The (beautifully rendered) skeletal cover art may be
http://www.spiderbytes.com/ambientrance/rep-s.htm

Extractions: Self-Released The (beautifully rendered) skeletal cover art may be more appropriate for the Hallowe'en season than it is for the bright and sprightly electrobeat sounds found in sonoluminescence . Self-confessed "electronic adrenaline junkie" reprobus has obviously poured his heart into these straightforward dance structures which are both retro and active. When you're finished at the AmbiEntrance, click on over to the Reprobus website to learn more. The bouncy beats and ratatat cymbals of love, to be the slave meet with assorted entities, from shimmering synth curtains, to e-piano notes, to tribal percussion to a load of house-y dance effects. Documenting the sounds that influenced Reprobus, very definite old school influences abound in electronic adrenaline junkie which also incorporates a certain amount of sweeping majesty into the track. mantra grooves more slowly, awash in light burbles, bassy rhythmic patterns and spaciously thudding beats. The dreamy oscillations and skyward synth veils of awakening are firmly pinned down by "classic" beat elements (the old robotic handclaps even). The cymbal-heavy, rapid-fire percussion of
Sonoluminescence Physics Research, University Of Michigan Physics Dept Advanced
Single Bubble sonoluminescence (SBSL) . This page contains CCD imagesof a SBSL experimental setup. The apparatus is located in
http://www-personal.umich.edu/~twod/sonoluminescence.html

Extractions: This page contains CCD images of a SBSL experimental setup. The apparatus is located in the Advanced Physics Teaching Laboratories, Randall Laboratories, University of Michigan Physics Department . The experiment is being developed this year as a candidate for being added to the laboratory's current list of ~30 experiments available to students. Various investigations of the photon emissions are also planned should the setup prove successful. My collaborator on this experiment (I've been the GSI [TA] for the course during Fall of 1998) is Daisuken Nagai , senior physics student.The course instructors are Professors Roy Clarke and Tim Chupp. SBSL is a recently discovered phenomena [by P. Gaitan, 1988] and is currently a subject of much theoretical and experimental interest. In SBSL, a single, micron-sized gas bubble is levitated (trapped) at the center of a cell containing water or other appropriate liquid by the acoustic pressure of vibrations applied at the resonance frequency of the apparatus. Under certain conditions, the bubble collapses while being violently driven, setting off (launching) a highly spherical shock wave towards the center of the bubble. A phase transition occurs whereby the bubble's gas reaches extremely high temperatures (5000 to 50,000 Kelvin) and is seen to emit bluish-white light in synch with the driving acoustic frequency. The turn-on time of the bubble during its collapse is extremely rapid (less than 50 psec) and it is also extinguished very rapidly in less than 34 psec. The jitter between adjacent pulses is quite small, less that 50 picosecond, which is much smaller than the jitter in the driving acoustic force itself.
Revue L'ATTRACTEUR, Hiver 2000 - La Sonoluminescence Ou L'étoile Mystérieuse -
Translate this page ISSN 1207-0203. La sonoluminescence. ou l'étoile mystérieuse. C'est lasonoluminescence l'art d'utiliser le son pour faire de la lumière!
http://www.physique.usherb.ca/attracte/09-2000/sonolumin.htm

Extractions: L'Attracteur No. Hiver 2000 LA REVUE DE PHYSIQUE ISSN 1207-0203 La sonoluminescence La variation de la pression j Effets de la variation de la pression La courbe rouge pression verte illustre la variation du rayon de la bulle. Celle-ci prend de l'expansion lorsque la pression faiblit puis, se contracte subitement lorsque la pression augmente. Les pics de la courbe bleue sonoluminescence B ibliographie Raymond A. Serway, Physique III: Optique et physique moderne e Seth J. Putterman, Sonoluminescence : sound into light, Scientific American Seth J. Putterman, , La recherche , volume 24, juin 1993, p. 750. http://www-phys.llnl.gov/N_Div/sonolum/ http://www.scs.uiuc.edu/~suslick/britannica.html Images SONOLUMINESCENCE : http://www.aip.org/physnews/graphics/html/sonophot.htm http://rsrch.com/saturna/ GRAPHIQUE : Lawrence Crum, Sonoluminescence, Physics Today , septembre 1994, p.26.
CERN Courier - Sonoluminescence - IOP Publishing
This Issue Back Issues Editorial Staff Physicswatch sonoluminescence.sonoluminescence appears to be chemical, rather than nuclear, in nature.
http://www.cerncourier.com/main/article/42/8/10/1/cernphysw2_10-02
CERN Courier - Sonoluminescence Could Be Ch - IOP Publishing
This Issue Back Issues Editorial Staff Physicswatchsonoluminescence could be chemical
http://www.cerncourier.com/main/article/42/8/10

Extractions: Sonoluminescence Research at the University of Illinois points to a chemical nature for sonoluminescence, the phenomenon whereby ultrasound is converted into picosecond light pulses via the rapid oscillations of bubbles in a liquid. Earlier this year, scientists at the US Oak Ridge National Laboratory raised the possibility that sonoluminescence might be linked to nuclear fusion ( CERN Courier May ). However, the Illinois team has found that intense sound can compress bubbles in a liquid, increasing their temperature to 10-20,000 K. This is high enough for the gas molecules inside to become ionized, and results in a series of chemical reactions. Studies on a single bubble of air in water revealed reactant products of nitrite ions, hydroxyl radicals and light. The sonic energy largely goes into chemical reactions, with a small fraction resulting in light, leaving precious little to generate nuclear fusion.
Sonoluminescence
sonoluminescence From Sound to Light. sonoluminescence (SL) is a fascinatingeffect of the light emission from the gaseous bubbles in liquids.
http://www.math.duke.edu/~kondic/sl.html

Extractions: Sonoluminescence (SL) is a fascinating effect of the light emission from the gaseous bubbles in liquids. The SL bubbles are driven by ultrasonic field, which makes them oscillate with ultrasonic frequency. If bubbles are driven strongly enough, short bursts of light are emitted once during each period of the sound field. The effect have been known for many years. But, just recently it become possible to produce single bubble SL, and to get much better insight into the effect and its characteristics. We have done a considerable amount of theoretical research in the field of sonoluminescence. The research started around 1992, when only very little was known about SL, and we formulated a few theoretical models with the goal of explaining the effect. Our research from this "early" period is summarized in the following papers: L. Kondic and Joel I. Gersten, Theory of the Origin of Brief Sonoluminescence Light Pulses PostScript (0.09 MB); L. Kondic and Joel I. Gersten, Sonoluminescence: A theoretical overview PostScript (1.3 MB);
Thread For Forum Environment
energy, water, Title sonoluminescence and the fusion anomaly. For more commentson sonoluminescence and the fusion anomaly, see www.21stcenturysciencetech.com.
http://www1.scientecmatrix.com/www/matrix/communities/dr_com_environment.nsf/vID
Sonoluminescence And Coleoptiles
Index sonoluminescence and coleoptiles. light. sonoluminescence isthe emission of light from cavitating bubbles driven by sound.
http://www.lns.cornell.edu/spr/2000-04/msg0023822.html

Extractions: Date Prev Date Next Thread Prev Thread Next ... Thread Index http://www.deja.com/profile.xp?author=dgoncz@aol.com* http://members.aol.com/DGoncz No eggs in the fridge, just cheap AA cells... Follow-Ups Re: Sonoluminescence and coleoptiles From: dgoncz@aol.com ( Somewhere in Northern Virginia ) Prev by Date: in situ measure stress Next by Date: Field equations for vector bosons Prev by thread: Re: in situ measure stress Next by thread: Re: Sonoluminescence and coleoptiles Index(es): Date Thread
Buoyancy-Driven Instabilities In Single-Bubble Sonoluminescence (BDiSL)
BuoyancyDriven Instabilities in Single-Bubble sonoluminescence (BDiSL) is a fluidphysics glovebox experiment that is to be conducted on the International
http://microgravity.grc.nasa.gov/6712/overviews/BDiSL_over.html
Sonoluminescence In Space: The Critical Role Of Buoyancy In Stability And Emissi
sonoluminescence IN SPACE THE CRITICAL ROLE OF BUOYANCY IN STABILITYAND EMISSION MECHANISMS. Abstract. INTRODUCTION AND MOTIVATION
http://microgravity.grc.nasa.gov/fcarchive/fluids/papers/Holt/Sonoluminescence_i

Extractions: Sonoluminescence is the term used to describe the emission of light from a violently collapsing bubble. Sonoluminescence ("light from sound") is the result of extremely nonlinear pulsations of gas/vapor bubbles in liquids when subject to sufficiently high amplitude acoustic pressures. In a single collapse, a bubbles volume can be compressed more than a thousand-fold in the span of less than a microsecond. Even the simplest consideration of the thermodynamics yields pressures on the order of 10,000 ATM. and temperatures of at least 10,000K. On the face of things, it is not surprising that light should be emitted from such an extreme process. Since 1990 (the year that Gaitan discovered light from a single bubble) there has been a tremendous amount of experimental and theoretical research in stable, single-bubble sonoluminescence (SBSL).

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

61-80 of 99 Back | 1 | 2 | 3 | 4 | 5 | Next 20