So to be able to move from one form to the other depends on what is required: amplitude, frequency modulation or both. By using PPM, we can do both phase and amplitude modulation, as demonstrated with ...

Animal experiments. Newborn Fischer 344 rats, delivered from timed pregnant rats, were maintained in room air or exposed to hyperoxia (>95% oxygen), iNO (20 or 40 ppm), or iNO (20 or 40 ppm ...

Researchers experimentally demonstrate the first joint-detection receiver capable of performing a joint measurement over pulse-position-modulation codewords. This result — the largest ...

The average concentration of carbon dioxide in the atmosphere is likely to rise by 2.8 parts per million to 411 ppm in 2019 – passing 410 ppm just a few years after first … Close Advertisement ...

Atmospheric concentrations of carbon dioxide made history last month by climbing to their highest seasonal peak available in historical records, a team of researchers reported. For the first time ...

For the first time, the seasonal peak of carbon dioxide concentrations in the atmosphere exceeded 430 parts per million (ppm) at NOAA’s Mauna Loa Observatory on Hawaii, scientists from NOAA and ...