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... Science Frontiers ONLINE No. 71: Sep-Oct 1990 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Wyoming: is old faithful a strange attractor?" Eruptions of Old Faithful Geyser are generally perceived as extremely regular events, with variation of eruptive interval being attributed to random noise. The governing equations for such a hydrothermal system are highly non-linear, therefore it is reasonable to assume that such systems are capable of operating in regines that display chaotic behavior. Three-dimensional state-space reconstruction of eruption time data provides strong evidence of a strange attractor quite similar to the Rossler attractor. Establishing the system as chaotic indicates that while one can predict eruptive intervals in the short term, long term predictions regarding Old Faithful's eruptive behavior ... impossible, no matter how carefully and accurately the system is modeled. The mean eruptive interval of Old Faithful has changed over time. This is consistent with the behavior of a chaotic system, which by definition must be nonstationary in the mean. Seismic activity is believed to be a perturbation shifting Old Faithful into a new chaotic state with a different shape to the strange attractor. A simple non-linear dynamic model of geyser behavior is proposed that leads to chaotic behavior and is consistent with the observations of eruption interval data for Old Faithful." (Nicholl, Michael, et al; "Is Old Faithful a Strange Attractor?" Eos, 71:466, 1990.) Comment. "Strange attractor" is a specialized term employed in chaos analysis. So, Old Faithful is not ...
Terms matched: 2 - Score: 491 - 15 May 2017 - URL: /sf071/sf071g16.htm
... sweet track Another anomaly bites the dust Astronomy Modern technology gets Two hot spots on mercury Astronomers cope with both Biology NATURE COMMUNICATES IN MYSTERIOUS WAYS Those amazing insects The bombardier beetle pulse-jet Duesberg revisited Geology Pennsylvanian time-scale problems OF TIME AND THE CORAL - AND OTHER THINGS, TOO Paleomagnetic pitfalls What's another dipole or two? Wyoming: a periodic spring WYOMING: IS OLD FAITHFUL A STRANGE ATTRACTOR? Geophysics Ball lightning studies LUNAR ECLIPSES AND RADIO PROPAGATION General Novel forms of matter ...
Terms matched: 2 - Score: 192 - 15 May 2017 - URL: /sf071/index.htm
... simple system which is shown in this article to be rich in examples of chaotic behavior. Data were taken for a wide range of drip rates for two different faucet nozzles and plotted as discrete time maps. Different routes to chaos, bifurcation and intermittency, are demonstrated for the different nozzles. Examples of period-1 , - 2, -3 , and -4 attractors, as well as strange attractors, are presented and correlated to the formation of drops leaving the faucet." (Dreyer, K., and Hickey, F.R .; "The Route to Chaos in a Dripping Water Faucet," American Journal of Physics, 59:619, 1991.) Comment. O.K ., so faucets dribble a bit. From Science Frontiers #77, SEP ... dripping water faucet is a simple system which is shown in this article to be rich in examples of chaotic behavior. Data were taken for a wide range of drip rates for two different faucet nozzles and plotted as discrete time maps. Different routes to chaos, bifurcation and intermittency, are demonstrated for the different nozzles. Examples of period-1 , - 2, -3 , and -4 attractors, as well as strange attractors, are presented and correlated to the formation of drops leaving the faucet." (Dreyer, K., and Hickey, F.R .; "The Route to Chaos in a Dripping Water Faucet," American Journal of Physics, 59:619, 1991.) Comment. O.K ., so faucets dribble a bit. From Science ...
Terms matched: 2 - Score: 176 - 15 May 2017 - URL: /sf077/sf077p18.htm
... ridge, so he could provide no further data. When morning came, as you probably surmised, the field displayed flattened wheat -- not the run-of-the-mill circles, but a scroll of sorts and even a triangle with rounded corners. (Meaden, G.T .; "The Beckhampton 'Scroll-Type' Circles, the Beckhampton 'Triangle,' and Strange Attractors," Journal of Meteorology, U.K ., 15:317, 1990.) Comment. Could the English column of light have been created by the same force that made the Ohio burnt circle? The "triangle" nearby. The sides are 10-11 meters long. Des Ronds dans le Ble. Yes, the French are chasing crop circles, too. In ... , a team of 8 French observers (designated VECA 90) spent the summer of 1990 in England. After watching by night without success, reviewing the English data, they finally discovered the secret (" ils ont finalement decouvert le pot aux roses"). The crop circles and all the elaborate designs are man-made! In fact the French team demonstrated how one could quickly make circles and more complex designs with a garden roller. Case closed!? (Pinvidic, Thierry; "L 'Histoire Folle des Ronds dans le Ble," Science et Vie , no 878, p. 28, November 1990. Cr. C. Mauge.) Comment. That all crop circles are manmade is debatable, certainly many are, and one can make a case for a meteor ...
Terms matched: 2 - Score: 172 - 15 May 2017 - URL: /sf073/sf073g11.htm
