Abstract: The present disclosure relates to compounds of Formula I: and pharmaceutically acceptable salts thereof, pharmaceutical compositions thereof, useful in the treatment of treating viral infections, for example, coronaviridae infections.

Abstract: An ultrasonic anemometer employs three ultrasonic transducers arranged in a configuration defining a horizontal equilateral triangle. Each of the transducers has a response profile characterized by a primary central lobe and secondary or side lobes angularly inclined from and surrounding the primary lobe. Each transducer is tilted from the horizontal to align the secondary lobes with signal propagation paths between it and the other transducers, thus affording a minimum number of transducers performing at a high degree of efficiency. Circuitry is employed to cause the ultrasonic transducers to generate either continuous wave acoustic signals or single pulse acoustic signals on an alternating basis. In each case only one of the transducers transmits the acoustic signal while the other two transducers receive the signal.

Abstract: A microfiche recorder has an X carriage movable along a guide in the X direction and a Y carriage mounted on the X carriage and movable in the Y direction. The guide provides a pivot connection wherein the X carriage and the Y carriage are swingable in a Z direction toward an away from a microfiche holding platen.