Model 500 Mod Magic Squares Quickie Introduction A curious arrangement of numbers includes what is referred to as a “magic square”. The magic derives from the fact that numbers arranged in a square of equal sides all add to the same total, coming and going, up and down, and oft times even from an angle (diagonal). For example: Note that the total always adds to 15 (row, column or diagonal), the diagonals no longer necessarily add properly if either the row and/or columns are mixed, and the total of any three rows or columns is 45. More information on this topic can be found at the Halexandria Forums. One can also do a 4x4 magic square, e.g. Here the rows and columns add to 34, but in this particular case the diagonals do not. The 3x3 example above is considered Panmagic, Diabolical, Nasik, or Pandiagonal, while the 4x4 above is merely magic. It is also possible to start with zero, instead of one, so that a possible 5x5 magic square is: The 6x6 magic square is particularly interesting. Magic? Mars = 65/325 Sun = 111/666
Binaural beats Binaural beats To experience the binaural beats perception, it is best to listen to this file with headphones on moderate to weak volume – the sound should be easily heard, but not loud. Note that the sound appears to pulsate. Now remove one earphone. Note that the pulsations disappear completely. The brain produces a phenomenon resulting in low-frequency pulsations in the amplitude and sound localization of a perceived sound when two tones at slightly different frequencies are presented separately, one to each of a subject's ears, using stereo headphones. Binaural beats reportedly influence the brain in more subtle ways through the entrainment of brainwaves[3][8][9] and provide other health benefits such as control over pain.[10][11] Acoustical background[edit] Interaural time differences (ITD) of binaural beats For sound localization, the human auditory system analyses interaural time differences between both ears inside small frequency ranges, called critical bands. History[edit]
Martín Ramírez (pintor) Martín Ramírez, (1895-1963) pintor autodidacta mexicano. Considerado como uno de los mejores maestros del arte autodidacta del siglo XX. Vivió en los Estados Unidos en instituciones de enfermos mentales, ya que padecía de esquizofrenia. Ramírez nacido el 30 de marzo de 1895 en Tepatitlán de Morelos, Jalisco, México. Muere el 12 de febrero de 1963 de una pulmonía en el hospital donde había estado recluido varias décadas. Del 2 de enero de 2007 al 29 de abril de 2007 el American Folk Art Museum en Nueva York hace la retrospectiva de uno de los más grandes pintores del siglo XX.[1] Volver arriba ↑ Martín Ramírez - Art - Review - New York Times
2+2=5 Humor in der Mathematik The History of 2 + 2 = 5 by Houston Euler "First and above all he was a logician. At least thirty-five years of the half-century or so of his existence had been devoted exclusively to proving that two and two always equal four, except in unusual cases, where they equal three or five, as the case may be." -- Jacques Futrelle, "The Problem of Cell 13" Most mathematicians are familiar with -- or have at least seen references in the literature to -- the equation 2 + 2 = 4. Many cultures, in their early mathematical development, discovered the equation 2 + 2 = 5. Recent findings indicate that the Pythagorean Brotherhood discovered a proof that 2 + 2 = 5, but the proof never got written up. Around A.D. 1200 Leonardo of Pisa (Fibonacci) discovered that a few weeks after putting 2 male rabbits plus 2 female rabbits in the same cage, he ended up with considerably more than 4 rabbits. Some 400 years later, the thread was picked up once more, this time by the French mathematicians.
Bereitschaftspotential In neurology, the Bereitschaftspotential or BP (from German, "readiness potential"), also called the pre-motor potential or readiness potential (RP), is a measure of activity in the motor cortex and supplementary motor area of the brain leading up to voluntary muscle movement. The BP is a manifestation of cortical contribution to the pre-motor planning of volitional movement. It was first recorded and reported in 1964 by Hans Helmut Kornhuber and Lüder Deecke at the University of Freiburg in Germany. In 1965 the full publication appeared after many control experiments.[1] Discovery[edit] In the spring of 1964 Hans Helmut Kornhuber (then docent and chief physician at the department of neurology, head Professor Richard Jung, university hospital Freiburg im Breisgau) and Lüder Deecke (his doctoral student) went for lunch to the 'Gasthaus zum Schwanen' at the foot of the Schlossberg hill in Freiburg. Mechanism[edit] Typical recording of a Bereitschaftspotential Outcomes[edit] Applications[edit]
Polvos de cine: sexo real en películas no pornográficas Polvos de cine: sexo real en películas no pornográficas Hay una infinidad de películas que poseen escenas sexuales, pero ¿existen películas en las que las escenas de sexo hayan sido reales y no se considere pornografía? Por DAVID ALAYÓN A comienzos de los años 60, empezaron a romperse las barreras sobre lo que estaba permitido mostrar en una película y lo que no. Hasta entonces, el sexo en pantalla era algo algo que sólo mostraban algunas pequeñas productoras independientes y, por supuesto, la industria pornográfica. A partir de estos años, se comenzaron a incluir escenas de este tipo en películas orientadas al gran público. Aunque no es lo usual, a lo largo de la historia se han rodado coitos en películas mainstream que han sido genuinos y auténticos. Sexo demoniaco: Anticristo (2009) El ejemplo más reciente de sexo no simulado es la polémica e inesperada Anticristo de Lars Von Trier. Sexo musical: 9 canciones (2004) Sexo adolescente: Ken Park (2002) Sexo natural: Shortbus (2006)
Henri Poincaré Henri Poincaré Henri Poincaré (29 avril 1854 à Nancy, France - 17 juillet 1912 à Paris) est un mathématicien, physicien et philosophe français. La Science et l'Hypothèse, 1902[modifier] Douter de tout ou tout croire, ce sont deux solutions également commodes, qui l'une et l'autre nous dispensent de réfléchir. La Valeur de la Science, 1905[modifier] L'histoire géologique nous montre que la vie n'est qu'un court épisode entre deux éternités de mort, et que, dans cet épisode même, la pensée consciente n'a duré et ne durera qu'un moment. La Valeur de la Science (texte en ligne), Henri Poincaré, éd. Science et Méthode, 1908[modifier] Le savant n’étudie pas la nature parce que cela est utile ; il l’étudie parce qu’il y prend plaisir et il y prend plaisir parce qu’elle est belle. Science et méthode (texte en ligne) (1908), Henri Poincaré, éd. …la mathématique est l’art de donner le même nom à des choses différentes. Science et méthode (texte en ligne) (1908), Henri Poincaré, éd. M. Lettre à C.
Mental chronometry Mental chronometry is the use of response time in perceptual-motor tasks to infer the content, duration, and temporal sequencing of cognitive operations. Mental chronometry is one of the core paradigms of experimental and cognitive psychology, and has found application in various disciplines including cognitive psychophysiology, cognitive neuroscience, and behavioral neuroscience to elucidate mechanisms underlying cognitive processing. Mental chronometry is studied using the measurements of reaction time (RT). Reaction time is the elapsed time between the presentation of a sensory stimulus and the subsequent behavioral response. In psychometric psychology it is considered to be an index of speed of processing.[1] That is, it indicates how fast the thinker can execute the mental operations needed by the task at hand. In turn, speed of processing is considered an index of processing efficiency. Types[edit] Response time is the sum reaction time plus movement time. Abū Rayhān al-Bīrūnī[edit]