1822 Translate this page lissajous, jules-Antoine (Versailles 1822-Plombierès-les-Dijon 1880) fisicofrancese, da cui curve di lissajous, dedicatosi a studi di acustica e di ottica http://www.viandante.it/sito24/XIX secolo/1822.htm
Extractions: Curò la prima edizione del Rgveda (1861-63) e il Catalogus Catalogorum (1891-1903, classifica di tutti i manoscritti sanscriti conosciuti). Bevilacqua La Masa, Felicita duchessa di (Verona 1822-Venezia 1899) patriota italiana, organizzatrice di ospedali militari nella I guerra d'indipendenza (1848) e nella difesa della Repubblica Romana (1849);
Extractions: Lissajous (pronounced LEE-suh-zhoo ) figures were discovered by the French physicist Jules Antoine Lissajous. He would use sounds of different frequencies to vibrate a mirror. A beam of light reflected from the mirror would trace patterns which depended on the frequencies of the sounds. Lissajous' setup was similar to the apparatus which is used today to project laser light shows. Before the days of digital frequency meters and phase-locked loops, Lissajous figures were used to determine the frequencies of sounds or radio signals. A signal of known frequency was applied to the horizontal axis of an oscilloscope, and the signal to be measured was applied to the vertical axis. The resulting pattern was a function of the ratio of the two frequencies.
Curvay Tutorial Text lissajous figures take their name from jules Antoine lissajous, a French physicistwho studied these patterns in the context of sound waves produced by tuning http://www.spelunkcomputing.com/curvay/tutorial_text.html
Extractions: Curvay draws a rich variety of patterns with a wave-guided pen. In other words, the movement of the pen is controlled by waves. More specifically, it is controlled by two waves, traveling perpendicular to each other. The following paragraphs show how this works and hint at the range of possibilities. For each numbered paragraph, a brief demonstration is available in the box to the right of this text. The demonstrations are triggered by clicking the corresponding paragraph numbers. Imagine a cork bobbing on a wave, not an ocean wave, but an idealized mathematical wave (a sinusoid). As the wave travels by, the horizontal position (x) of the cork does not change but its vertical position (y) does. The cork moves up and down along a vertical line segment. Now imagine the wave traveling along a vertical line (the y-axis) instead of a horizontal one (the x-axis). If you turn your head sideways you can still envision a cork bopping on the wave, this time following a horizontal line segment. It may be easier to dispense with any physical analogy and simply say that this wave drives the horizontal position of a pen. Suppose the two waves discussed thus far are acting simultaneously on a single pen. The wave traveling along the horizontal (x-axis) controls the vertical position (y) of the pen, while that traveling along the vertical (y-axis) controls the horizontal position (x). The pen now traces a diagonal line.
Measurement Techniques The waveform resulting from this arrangement is called a lissajous pattern (namedfor French physicist jules Antoine lissajous and pronounced LEEsa-zhoo). http://www.cs.tcd.ie/courses/baict/bac/jf/labs/scope/meastech.html
Extractions: This section teaches you basic measurement techniques. The two most basic measurements you can make are voltage and time measurements. Just about every other measurement is based on one of these two fundamental techniques. This section discusses methods for taking measurements visually with the oscilloscope screen. Many digital oscilloscopes have internal software that will take these measurements automatically. Knowing how to take the measurements manually will help you understand and check the automatic measurements of the digital oscilloscopes. Take a look at the oscilloscope display. Notice the grid markings on the screen - these markings create the graticule . Each vertical and horizontal line constitutes a major division . The graticule is usually laid out in an 8-by-10 division pattern. Labeling on the oscilloscope controls (such as volts/div and sec/div) always refers to major divisions. The tick marks on the center horizontal and vertical graticule lines (see Figure 1) are called minor divisions. Many oscilloscopes display on the screen how many volts each vertical division represents and how many seconds each horizontal division represents. Many oscilloscopes also have 0%, 10%, 90%, and 100% markings on the graticule (see Figure 1) to help make rise time measurements
MC163 - Sculture Tridimensionali Virtuali Translate this page Per la cronaca esse furono studiate molto prima che nascesse l'elettronica prendonoinfatti il nome dal fisico francese jules Antoine lissajous (1822-1880 http://www.pluricom.it/mcm/intellig/paper/163/intg_163.htm
Extractions: Intelligiochi MC163, giugno 1996 numero 139 di MC (aprile 1994) mi occupai per l'appunto della generazione di forme naturali quali le conchiglie ed i corni. In quell'occasione imparammo come generare la descrizione matematica di questi oggetti e come interfacciarla ad un ray-tracer di pubblico dominio quale POV-ray. Il risultato fu una collezione di conchiglie, corni e tortiglioni variamente striati, tutti caratterizzati da un aspetto estremamente realistico. Concetti di base inviluppo equazione parametrica , che genera le tre coordinate spaziali x y e z a partire da un solo parametro indipendente t t , ed in ognuno di questi punti "depositiamo" una sferetta virtuale. Il raggio, il colore, la finitura superficiale di ciascuna sferetta possono idealmente dipendere da t Lissajous, chi era costui? spirale logaritmica I candidati migliori per questo tipo di applicazione sono ovviamente le equazioni periodiche t "figure di Lissajous" Nel nostro caso particolare servono figure di Lissajous tridimensionali , le cui equazioni parametriche in coordinate cartesiane sono ad esempio: x = rho sin( theta t ) cos( phi t );
Extractions: Scientific Instruments Ancient and Modern Part 2 of 3 Turkish Koran, mid-sixteenth century The preeminence of Islamic science in the Middle Ages was rivalled by achievements in the decorative arts. This exquisite manuscript with its beautiful original binding was purchased by Earnest Watson in 1957 and later given to the Institute. The wording on a stamp on the last page links this Koran to the Ottoman sultans. Although scholars have not reached complete agreement on its provenance, it has been suggested that the manuscript was presented to a mosque by Selim II, the son of sultan Suleiman the Magnificent. Selim II reigned from 1566-1574. Universal tangent galvanometer From Bridge Laboratory of Physics. Used at Caltech in freshman physics to demonstrate the presence of electromagnetic fields. Invented in the 1830s, the instrument is so named because the tangent of the angle of deflection of the moving coil (right) was directly proportional to the current in the fixed coil. The manufacturer was Queen and Company of Philadelphia, a prominent American firm in the second half of the 19th century.
The Moving Picture These curves were studied by the French mathematician jules Antoine lissajous(1822 to 1880). Found a problem with the site? Click here and let us know. http://www-maths.mcs.st-andrews.ac.uk/images/gifinfo.shtml
Extractions: Home Personnel Info for prospective undergraduates Research and postgraduates ... MacTutor History of Mathematics This image plots the graph of the function y = cos( k sin( x )) over the range of x from to pi and as we vary k we get a moving picture. When k = this gives the graph of y = 1 which is a straight line, and we then let k vary from to 15 and back again to 0. This is one of the figures ones sees on a cathode ray tube when one puts different frequency signals on to the " x and y plates". The formula for the curve is x = cos(5 t y = cos(4 t ) where t runs from to 2 pi and then back to again. These curves were studied by the French mathematician Jules Antoine Lissajous (1822 to 1880). Found a problem with the site? Click here and let us know.
Automatic Expressionism History. (Nathaniel Bowditch, 1815; jules Antoine lissajous in 1857.) OpgaveZoek de oorspronkelijke bronnen op en rapporteer over wat je vindt.. http://iaaa.nl/cursusAA&AI/metamatic.html
Extractions: Simulating Pollock Richard Taylor, Adam Micolich and David Jonas: " Fractal expressionism ." Physics World , 10 (October 1999). One of Jackson Pollock's drip paintings is compared with images from nature, and with images generated by a chaotic pendulum. Its statistical uniformity is established, and the fractal dimension of its different layers is calculated. Meta-matic no. 8 (Meta-Moritz) "Brevet d'Invention" van het Franse Ministerie van Industrie, Service de la Propriété Industrielle, aangevraagd op 26 juni 1959 en verleend op 17 juni 1960, voor een "appareil à dessiner et à peindre": "La présente invention a pour objet un appareil de construction simple permettant de dessiner ou de peindre d'une manière qui, en pratique, est entièrement automatique, l'intervention humaine étant limitée au choix d'un ou de quelques paramètres, et éventuellement, à la fourniture de l'énergie motrice."
Professor Math lissajous Figures (pronounced LEEsuh-zhoo) were discovered by theFrench physicist jules Antoine lissajous. He would use sounds http://www.asd.wednet.edu/professormath/pmath.htm
Extractions: Don't forget! AHS math teachers recommend that every student have access to a calculator at home. The TI-83 Plus is an easy-to-use graphing tool and a must-have for classes ranging from Algebra to Pre-Calculus and Biology to Physics. And it's permitted for use on many tests and college admissions exams including the SAT. Where to buy Our Learning Targets -
MARVELLOUS MATHEMATICAL MYSTERIES lissajous. jules Antoine Lissagous http//wwwgap.dcs.st-and.ac.uk/~history/Mathematicians/lissajous.html.Java Applets by Daniel http://www.nhs.vic.edu.au/home/lib/virt_lib/mathsweek8.htm
Extractions: MARVELLOUS MATHEMATICAL MYSTERIES Fibonacci Fibonacci: http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Fibonacci.html The Fibonacci Numbers: http://math.holycross.edu/~davids/fibonacci/fibonacci.html Archimedes Archimedes: http://www.mcs.drexel.edu/~crorres/Archimedes/contents.html Archimedes of Syracuse: http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Archimedes.html Blaise Pascal Blaise Pascal: http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Pascal.html Pythagoras Pythagoras of Samos: http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Pythagoras.html Pythagorean theorem: http://www.cut-the-kn ot.com/pythagoras/ Thomas Bradwardine Thomas Bradwardine: http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Bradwardine.html Mobius Mobius strip: http://www.rose-hulman.edu/~berglunb/Mobius.html Mobius strip: http://www.geocities.com/CapeCanaveral/Hangar/7773/mobius.html Escher MC Escher: http://www.etropolis.com/escher/ The Official MC Escher website: http://www.mcescher.com/ Escher: http://www.djmurphy.demon.co.uk/escher.htm
March 2002 3 Georg Cantor, 4 jules Antoine lissajous, 5 William Oughtred, 6 EttoreBortolotti, 7 John Herschel, 8 George Chrystal, 9 Howard Aiken. http://mathforum.org/~judyann/calendar/March2002.html
Extractions: LI, Rosa (+7:47 LMT) Tsinan Shantung (RC) Code: MN Source: RO LIAGRE, Jean (+0:13 LMT) Tournai -HAI- (B) Code: WS MI PO Source: GQ LIARD, Edgar (+0:16 LMT) La LouviËre -HAI- (B) Code: MI Source: GQ LIAUTEY, Andre (+0:09 ParisT) Port sur SaÙne -70- (F) Code: PO Source: GQ LIBERACE, * (-5:00 CST/W) Milwaukee/West Allis -WI- (USA) Code: AR Source: RO LIBERATI, Ernest (+0:09 ParisT) Oran (DZ) Code: SP Source: GQ LIBERT, Alfred Ostende -W-VL- (B) Code: MI Source: GQ LIBERT, Henri (+0:09 LMT) Paris -75- (F) Code: MU Source: GQ LIBOIS, Jean (+0:12 LMT) Bruges -W-VL- (B) Code: MI Source: GQ LICAUSI, Girolamo (+1:00 MET) Termini-Imerese -PA- (I) Code: PO Source: GQ LICHTE, Karl Heinz (+1:00 MET) Wanne-Eickel -NRW- (D) Code: MI Source: GQ LICHTENBERG, Georg Christoph (+0:31 LAT) Oberramstadt (D) Code: WS Source: DS LICHTENBERGER, AndrÈ (+0:31 LMT) Strasbourg -67- (F) Code: SS Source: GQ LICHTENBERGER, Walter Speyer -RP- (D) Code: MI Source: GQ LICHTWITZ, Andre (+0:09 ParisT) Le Bouscat -33- (F) Code: ME Source: GQ LIDDELL, William (+0:00 WET) * -SCO- (GB) Code: SP Source: DS SCOTT LIDTH JEUDE, Otto (+0:21 LMT) Tiel -GEL- (NL) Code: PO Source: GQ LIE, Trygve Halvdan
Mostra Eventos Da Data Selecionada Translate this page russo) 03/03/1901 - Nascimento de Otto Schreier (matemático austríaco) 04/03/1822- Nascimento de jules Antoine lissajous (matemático francês) 05/03/1779 http://www.ponteiro.com.br/mostrad8.php?w=13&pg=2
Lissajous Nathaniel Bowditch who considered them in 1815. They were studied inmore detail (independently) by julesAntoine lissajous in 1857. http://www.math.hcmuns.edu.vn/~algebra/history/history/Curves/Lissajous.html
EDN Access the standard technique for calibrating a signal source was comparison via the lissajouspattern, named for 19th century French physicist jules A lissajous. http://www.e-insite.net/esec/Article_269855.htm
Extractions: Powered by PartMiner Home EDN Asia EDN China EDN Japan ... Events Inside EDN About Us Editorial Info Editorial Calendar Connect with our Editors ... Marketing Technical Resources Analog ICs/Discretes Communication Functions Components, Hardware, Interconnect Computers, Boards, Buses ... Web Exclusives Sensor calibration turns old technique into new trick By adding modern developments in optical and signal processing to a 125-year-old method, you can calibrate accelerometers despite displacements that are less than a wavelength of light. By Bill Schweber, Executive Editor document.write(get_publication('EDN')); Sidebars: Sensor and source calibration has always been a challenge for scientists and engineers. The obvious way to perform this task is to use comparison and check your sensor or your source against a known, calibrated, better one. But this method reaches a limit, because, at some stage in the sequence, no better sensor or source for comparison exists, and you reach the end of the "better-standard" line. Further, the unavoidable errors inherent in the comparison chain and process itself always diminish your results.
Kurver 0+$c),$b*sin($_0)); } Kaldes også Bowditch kurver efter Nathaniel Bowditch, somstuderede dem i 1815 men mindre grundigt end julesAntoine lissajous i 1857 http://hjem.get2net.dk/bnielsen/kurver.html
About The ABC form of fill in material. lissajous figures are named after Juleslissajous, a 19th century physicist. They are the figures seen http://www.abc.net.au/corp/hist1.htm
Extractions: A Short History of the ABC For seventy years the ABC has been a distinctive part of the Australian way of life. Australia's only national, non-commercial broadcaster, the ABC has shared its history and development with the growth of our nation. From its beginnings during the Depression years, the ABC has grown into Australia's largest broadcaster, entertainment and marketing organisation. It has become an important part of Australia's cultural heritage, fostering the arts and reflecting the nation's cultural diversity. HISTORY OF ABC LOGO When television transmission began in Australia in 1956, channels experimented with on-air presentation styles and ways of filling the time between programs. They wanted to ensure that, although programs had differing durations, each program started at the scheduled time - usually on the hour or half hour. Commercial channels used paid advertisements but the ABC had to look for other means including live on-camera presentation. Where this was not possible, filmed 'fillers' were used and viewers were subjected to endless charming and picturesque scenes of boat trips up local rivers and the like. A senior engineer on the ABC staff, Ken Middleton, conceived the idea of using Lissajous figures or waveforms with appropriate background music as a form of fill- in material. Lissajous figures are named after Jules Lissajous, a 19th century physicist. They are the figures seen as an oscilloscope measures modulation, notably in sound and vision.
Kosmoi: Encyclogram The harmonograph was pioneered by the French physicist, jules AntoineLissajous in 1857. The first harmonograph actually used a http://kosmoi.com/Science/Mathematics/Graphs/Encyclo/reprint.shtml
Extractions: by AR Encyclogram draws harmonographs, spirographs , and Lissajous figures . The decaying motion of the plot fills in the shapes with their spiralling-in echo. Encyclogram can also draw the curves in varying colors against a black background, resulting in breath-taking works of art that can be as beautiful as fractals . See the gallery of examples Harmonographs are mathematically the sums of several harmonic motions in the x and y directions, decayed over time. If the decay is removed, and there are only two harmonic motions (sinusoids), one in x and one in y, then the graphs are Lissajous figures . If another harmonic motion is added to each axis, and they are all in a specific phase relationship, then spirographs can be generated. These are better-known as the result of rolling a (toothed) wheel around inside another wheel, with a pencil point through a hole in the rolling wheel. You don't have to know any mathematics to use Encyclogram (though if you're studying trigonometry you'll find this applet is an interesting example of what can be done with sine curves!). Simply move the sliders around, and try the check boxes. Here's how it works:
Extractions: The Lissajous figures , named for the French mathematician Jules-Antoine Lissajous , are also known as Bowditch curves after their discoverer, Nathaniel Bowditch , the mathematician from Salem, Massachusetts. The history that follows is taken from MIT Lincoln Laboratory: Technology in the National Interest , ed. Eva C. Freeman. Lexington, Mass.: MIT Lincoln Laboratory, 1995. The MIT Lincoln Laboratory Logo, which first appeared in February 1958 in the Lincoln Laboratory Bulletin, was conceived by Carl Overhage, the Laboratory's fourth director. Overhage drew a Lissajous figure based on the superposition of two simple harmonic vibrations and commissioned retired Brigader General Robert Steinle and the firm Advertising Designers of Los Angeles to transform the Lissajous figure into an artistic image. The two L's rotated 180 degrees with respect to each other stand for Lincoln Laboratory. They form a rectangle enclosing the Lissajous figure generated by the parametric equations x = 3 sin(8 pi t/T) and y = 4 sin(6 pi t/T). The figure is traced along the horizontal axis x and the vertical axis y as the variable t progresses from t = to T.