Xiaohui Xue Dept. of Computer Science, Harbin Institute of Technology, Harbin, Heilongjiang, P.R.China [email protected] The mainstream of image compression research has been based on the Shannon Information Theory for years. In image data, there exist statistical redundancy, knowledge redundancy and psychophysiological redundancy, and the latter two cannot be handled by Shannon theory. Th...

To answer the question whether OFF response amplitude (firing rate) of visual cortical cells varies as a function of stimulus duration, a series of such cells from areas 17 and 18 of the cat were investigated with a stationary light bar, presented for different durations (10-3200 msec) over the receptive field. Out of a sample of 174 cells tested, 58 cells were found for which the OFF responses...

results the mean qtc at baseline (pre-methadone) was 426 ± 34 msec and after being on methadone for an average of 8.72 ± 4.50 years was significantly higher at 450 ± 35 msec. no significant relationships were found between qtc prolongation and risk factors except for calcium. the methadone dosage was significantly higher in veterans with a qtc change above the mean change of ≥ 24 msec (88.48 ± ...

Many species of Drosophila have courtship displays in which the male vibrates one or both wings after approaching the female. In Drosophila melanogaster the major part of this display occurs with the wing nearer the female extended to nearly 90 from the long axis, in which position the wing is vibrated (Spieth, 1952). It has been shown that this vibration is accompanied by a train of sound puls...

Samples of cell suspension represents seven different densities were exposed to three electrotreatment 40, 50, 60 volt and for a period time 100 msec then the mixed with concentration Ri plasmid 25, 75 Microliter. The samples cultured by embedding in agar drops solid-liquid cultures. Results proved that enhanced division caused clear increase microcolonies, total number colonies reached 3276 wh...

Sinus node (SN) function was analyzed with and without autonomic blockade in 20 normal subjects, ages 15-67 years (mean 44 i 16 years). Various electrophysiologic measures of SN functionSN cycle length (SNCL), SN recovery time (SNRT), corrected SNRT (CSNRT) and sinoatrial conduction time (SACT) were analyzed. CSNRT was measured after atriil pacing at multiple rates. SACT was analyzed using two ...

The primate retina serves up three channels for visual entertainment, of which just one is used for the primary analysis of motion. A prominent, unique class of neuron has a dominant role in transmission from cortical area V1.

We have studied the development of the temporal characteristics of the pattern visual evoked potentials (P-VEPs) in response to contrast reversal of patterns of low spatial frequency (0.1 c/deg) of either pure luminance contrast (yellow-black plaid patterns) or pure colour contrast (equiluminant red-green plaid patterns) in 15 infants between 6 and 30 weeks of age. High contrast patterns were m...