Known more for his dark, psychological crime thrillers Primal Fear (1996) and Fallen (1998), director Gregory Hoblit surprisingly created this Frank Capra-meets-Rod Serling-style fantasy that mixes several genres of storytelling into a likable stew. James Caviezel stars as John Sullivan, a New York police detective who has never recovered from the death of his father Frank (Dennis Quaid), a firefighter who died heroically when John was a boy. Experimenting with his dad's beloved ham radio one summer night, extreme sunspot activity allows John to contact Frank 30 years in the past. Since he's able to warn Frank away from danger, his father's death never occurs. Then the unthinkable happens: John's altered future is one in which his mother Julia (Elizabeth Mitchell) has been murdered by a serial killer. Now John in the present and Frank in the past must try to solve the riddle of the killer's identity and change the time line again. Frequency was written by Toby Emmerich, the brother of actor Noah Emmerich, who appears in a supporting role created specifically for him. ~ Karl Williams, Rovi
High Quality Content by WIKIPEDIA articles Precision teaching is a precise and systematic method of evaluating instructional tactics and curricula. It is one of the few quantitative analyses of behavior forms of applied behavior analysis. It comes from a very strong quantitative scientific basis and was pioneered by Ogden Lindsley in the 1960s based largely on Skinners operant conditioning. Precision teaching is a type of programmed instruction that focuses heavily on frequency as its main datum. By focusing on fluency, the teacher can then adjust the curricula for each learner to maximize the learning based on the learners personal fluency measurements. The instruction can be by any method or approach. For example, the most effective applications of Precision Teaching have been when it is combined with Direct Instruction Children as young as five have charted their fluency measurements and utilized precision teaching to increase their learning. Author: Surhone, Lambert M./ Tennoe, Mariam T./ Henssonow, Susan F. Binding Type: Paperback Number of Pages: 84 Publication Date: 2010/09/09 Language: English Dimensions: 6.00 x 9.02 x 0.20 inches
High Quality Content by WIKIPEDIA articles A frequency divider is a circuit that takes an input signal of a frequency, fin, and generates an output signal of a frequency, where n is an integer. Phaselocked loop frequency synthesizers make use of frequency dividers to generate a frequency that is a multiple of a reference frequency. Frequency dividers can be implemented for both analog and digital applications. A frequency divider is a circuit that takes an input signal of a frequency, fin, and generates an output signal of a frequency: where n is an integer. Phaselocked loop frequency synthesizers make use of frequency dividers to generate a frequency that is a multiple of a reference frequency. Frequency dividers can be implemented for both analog and digital applications Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 80 Publication Date: 2010/12/08 Language: English Dimensions: 9.02 x 5.98 x 0.19 inches
Modding a Gameboy using a www.GetLoFi.com LTC Precision Timer Oscillator Circuit
Was the musical scale a discovery or an invention?
I had previously thought of notes as an invention, a kind of universal consensus upon standard frequencies. But I think about playing harmonics on my violin, and realize there is a very mathematical basis for pitches. Different notes are achieved on a violin string by shortening vibrating portion of the string, which is achieved by holding down a finger. Frequency is precisely related to the inverse of the length. If I hold my finger right in the midpoint of the string, the frequency is doubled, producing an octave. Such mathematical precision leads me to question my initial view of music as an invention. (For that matter, I view mathematics as a discovery.)
The Western system of intonation was developed by Pythagoras. You may recognize him from Math class. He used a lyre sting to demonstrate sound in terms of mathematical fractions. If a string is plucked it will play note of a certain pitch. If the string is divided in half it will play the exact same note an octave higher. Further subdivision of the string will result in an even higher pitch. An octave's pitch would be in a ratio of 2:1. If the string were divided into thirds, a new note with the ration of 3:1 would be produced by plucking the string. Pythagoras worked out a whole series of such mathematical ratio between notes, creating a scale with 8 notes A-G and 12 different pitches (including flats and sharps). Pythagoras's scale is often known as the circle of fifths. All frequencies on this scale can be produced by multiplying by 2 or 3. The scale looked good on paper, but there were some problems. It just didn't sound very good. It turns out, that other methods were necessary for the development of a more "musical" scale.
The problem was that his pitches were always relative to the tonic, and never absolute. That means the note C# in D Major is much different than the C# in terms of E Major. (The C# in D Major is higher than C# in E Major). In the 1700s temperament was defined so pitches would become absolute (Well-/ just-/ even- temperament), so that C# would always have the same exact frequency. When Bach played his harpsichord in the key of Eb minor, it would be so far from C major on which it was founded, that it would be out of tune. That was no longer an issue when he celebrated the advent of equal temperament by writing "The Well-Tempered Clavier"
I would say our Western scale was initially a discovery, but that equal temperament two thousand years later was an invention because it was a purposeful manipulation. Realize, that this only applies to Western music and other world musics have different histories and tunings. On a violin we are capable of both Pythagorean intonation (when we play in a string quartet) as well as equal temperament (when we play with a piano)
![B&K PRECISION 1801 [20 Hz to 40 MHz] FREQUENCY COUNTER *GOOD WORKING*](http://www.neonlightssigns.info/images/e/280865319291_0.jpg)
