25 OCT 2017 by ideonexus

 Canons and Fugues

The idea of a canon is that one single theme is played against itself. This is done by having "copies" of the theme played by the various participating voices. But there are means' ways to do this. The most straightforward of all canons is the round, such as "Three Blind Mice", "Row, Row, Row Your Boat", or " Frere Jacques". Here, the theme enters in the first voice and, after a fixed time-delay, a "copy" of it enters, in precisely the same key. After the same fixed time-delay in the second v...
Folksonomies: puzzles math music mathematics
Folksonomies: puzzles math music mathematics
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Bach left his Musical Offering unfinished as puzzles for King Frederick to figure out.

02 SEP 2016 by ideonexus

 Maintain Positive Memories and Knowledge

Other ways to celebrate and maintain positive memories and knowledge include the following: Have students teach the new skill to someone else. Have students keep a list of achievements in their math journals or write them on a wall chart. Take a photo of the fi nal achievement (even if it is something as simple as a well-solved math problem). Have students compose a note to their parents, and add your own comments. Provide opportunities for students to transfer the new skills to new situatio...
Folksonomies: education knowledge memory
Folksonomies: education knowledge memory
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05 FEB 2016 by ideonexus

 12 Tone Equal Temperament

On a standard piano keyboard, one octave is divided into 7 whole tones: A, B, C, D, E, F and G. In between these tones are 5 further notes which can be called either sharps or flats: A# (Bb), C# (Db), D# (Eb), F# (Gb), G# (Ab). (whether it's a sharp of a flat doesn't really matter, the note has the same frequency, just a different name). This gives us a grand total of 12 notes in one octave. If you were to measure the frequency of a note, then measure the frequency of a note exactly one octa...
Folksonomies: mathematics music
Folksonomies: mathematics music
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05 FEB 2016 by ideonexus

 The Mind on Music

For some reason that no one really understands, there is a psychological effect upon human listeners in regards to the musical scale. The tonic pitch, or tonal center is not only the mathematical center of the scale, but is the psychological center as well. Human perception of the tonic pitch in relation to the other notes of the scale gives each note of the scale, including the tonic pitch, a distinct "personality" or identity. If we were to label each note of the major scale with a number, ...
Folksonomies: mathematics music mind
Folksonomies: mathematics music mind
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12 MAR 2015 by ideonexus

 Spelling is an Invention, and May be Modified

Spelling was invented by man and, like other human inventions, is capable of development and improve- ment by man in the direction of simplicity, economy, and efficiency. Its true function is to represent as accurately as possible by means of simbols (letters) the sounds of the spoken (i. e. the living) language, and thus incidentally to record its history. Its prov- ince is not, as is often mistakenly supposed, to indicate the derivations of words from sources that ar in- accessible...
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Note the intentional use of simplified spelling in the text.

21 NOV 2013 by ideonexus

 1945 Warning of Bacterial Antibiotic Resistance

But I would like to sound one note of warning. Penicillin is to all intents and purposes non-poisonous so there is no need to worry about giving an overdose and poisoning the patient. There may be a danger, though, in underdosage. It is not difficult to make microbes resistant to penicillin in the laboratory by exposing them to concentrations not sufficient to kill them, and the same thing has occasionally happened in the body. The time may come when penicillin can be bought by anyone in the...
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At his Nobel lecture for discovering penicillin, Alexander Fleming warns that if you use, use enough to kill. Maiming the bacteria will make it resistant.

28 MAY 2013 by ideonexus

 Geological and Social Impact of the Himalayas

When you look at the planet from low orbit, the impact of the Himalayas on Earth’s climate seems obvious. It creates the rain shadow to beat all rain shadows, standing athwart the latitude of the trade winds and squeezing all the rain out of them before they head southwest, thus supplying eight of the Earth’s mightiest rivers, but also parching not only the Gobi to the immediate north, but also everything to the southwest, including Pakistan and Iran, Mesopotamia, Saudi Arabia, even North...
Folksonomies: society geology
Folksonomies: society geology
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They scorch the Earth and scorch the societies that live there. (Note: I disagree, this is overgeneralizing and ignores social ills of societies in more temperate climates)

04 JAN 2012 by ideonexus

 Sir Charles Bell on the Phylogeny of the Fetus' Brain

Man has two conditions of existence in the body. Hardly two creatures can be less alike than an infant and a man. The whole fetal state is a preparation for birth ... The human brain, in its earlier stage, resembles that of a fish: as it is developed, it resembles more the cerebral mass of a reptile; in its increase, it is like that of a bird, and slowly, and only after birth, does it assume the proper form and consistence of the human encephalon.
Folksonomies: evolution phylogeny
Folksonomies: evolution phylogeny
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Which recapitulates its evolutionary history (note: need reference for this)

24 SEP 2011 by ideonexus

 The Brain Consumes Lactose During Exercise

Scientists have discovered that lactose, a byproduct of intense muscular activities, can be used to fuel the brain with energy. When glucose, the natural fuel of the brain, is no longer present in sufficient quantities, the cell tissue can “switch” to alternative energy, to prevent any damage to the brain on account of the lack of energy. [...] Consequently, by consuming the lactose in the blood, the brain clears the way for glucose, the main powering substance in the body, to reach the...
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This frees up the body's glucose to fuel the muscles in times of high energy demands on the body (Note: This meme must be wrong in using the term "lactose," because that is a sugar that comes from milk. "Lactate" is a byproduct of muscles consuming glucose that fuels the brain while the muscles take energy-precedence).

12 JUN 2011 by ideonexus

 The Night Listening Game

The sound of the insect orchestra swells and throbs night after night, from midsummer until autumn ends and the frosty nights make the tiny players stiff and numb, and finally the last note is stilled in the long cold. An hour of hunting out the small musicians by flashlight is an adventure any child would love. It gives him a sense of the night's myster and beauty, and of how alive it is with watchful eyes and little, waiting forms. The game is to listen, not so much to the full orchestra, ...
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Where a child is taught to distinguish the individual sounds of the insects from the swarm and seek them out to identify by flashlight.