56,390 research outputs found
BowScribe: Supporting the violinist's performance model
Musicians often learn about their vision of a
piece through practicing it and listening to recordings. However,
this does not always free the player to develop his or her own
interpretation of the piece, especially when technique is lacking. We
have developed software, the BowScribe markup language, that supports
a violinist in creating a ``performance model'' of a piece currently
beyond his or her playing skills, by allowing the player fine control
over tempo, volume, and articulation, including playing of chords, at
a level of expressiveness and flexibility that is significantly beyond
the MIDI playback modes of popular music notation software. BowScribe
has been used by the first author (who was trained as a prfessional
violinist) to create a model of the entire Bach Chaconne (edited by
Glamian), a long and demanding piece of music for solo violin that has
many phrases that span groups of chords as well as melodic passages.
The markup language specified chords to be rolled in two classic ways,
as well as a wide variety of other strokes, including greater volume
for individual notes in long slurs and small but essential variations
in tempo
The anatomy of the Gunn laser
A monopolar GaAs FabryâPĂ©rot cavity laser based on the Gunn effect is studied both experimentally and theoretically. The light emission occurs via the band-to-band recombination of impact-ionized excess carriers in the propagating space-charge (Gunn) domains. Electroluminescence spectrum from the cleaved end-facet emission of devices with Ga1âxAlxAsâ(x = 0.32) waveguides shows clearly a preferential mode at a wavelength around 840 nm at T = 95âK. The threshold laser gain is assessed by using an impact ionization coefficient resulting from excess carriers inside the high-field domain
Operation of the University of Hawaii 2.2M telescope on Mauna Kea
NASA's planetary astronomy program provides part of the funding for the 2.2 meter telescope. The parameters for time on the telescope are laid out. A major instrumental highlight has been the commissioning of a 256 x 256 near infrared camera which uses a Rockwell NICMOS-3 array. At the f/10 focus, image scales of 0.37 and 0.75 arcsec/pixel are available. A new, high quantum efficiency Tektronix 1024 x 1024 CCD saw first light on the telescope in 1991, and was available regularly from April 1991. Data from both of these detectors are transmitted directly to the Sun workstation for immediate analysis by the observers. The autoguider software was enhanced to permit guided tracking on objects have nonsideral motions (i.e., solar system objects)
FearNot! An Anti-Bullying Intervention: Evaluation of an Interactive Virtual Learning Environment
Original paper can be found at: http://www.aisb.org.uk/publications/proceedings.shtm
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