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enantioselective metal-catalyzed Diels–Alder reaction, which had been developed by his group.1 In contrast, asymmetric Diels–Alder reaction catalyzed by organocatalysts has only a rather short history and has been neglected for quite a long...
Attenuation is loss of energy, expressed as change in intensity, as the energy travels through a medium. Ultrasound intensity is measured in watts per square centimeter. Decibels are used to express difference between ultrasound intensities...
Digital conversion at Radio-Frequencies (RF) or Intermediate-Frequencies (IF) permits digital control and programmability of both the gain and the filter coefficients of the IF stage. This enables the receiver to support multiple communicat...
VHF-4000 tranceivers (VHF COM1 and VHF COM2), 2. two VHF antennas. The VHF COM transceivers are remote-mounted multichannel VHF voice transceivers that supply AM voice communications. The VHF COM transceivers are adept to funct...
1: the report question One of the Group’s members believes that there is both ‘fixed’ and ‘mobile’ WiMAX. They have learned that Amton is getting something called ‘IEEE 802.16e’. Is that fixed or mobile, and does it matter regarding possibl...
Quadrature amplitude modulation is widely used in many digital data radio communications and data communications applications. A variety of forms of QAM are available and some of the more common forms include 16 QAM, 32 QAM, 64 QAM, 128 QAM...
making the PC for about 20 years now. Macintosh Apple computers have been around longer, and were very popular before the PC, in the late 80’s and early 90’s. However, by the mid-90’s, Macs had fallen out of style, because they were not co...