Viral diseases: Introduction. A viral infection is any type of illness or disease caused by a virus, a type of microbe. Microbes are tiny organisms that cannot be seen without a microscope and include bacteria, fungi, and some parasites, as well as viruses.iral diseases: Introduction. A viral infection is any type of illness or disease caused by a virus, a type of microbe. Microbes are tiny organisms that cannot be seen without a microscope and include bacteria, fungi, and some parasites, as well as viruses.
OPTAR stands for Operating/Operational Target. Operating Targets. Operations, Planning, Training and Resource Support Services. Oceanside Photo & Telescope Astronomical Society (San Diego County, CA) Operational Tasking. Operational Tasking Data Link. Operational Tasking Nuclear. Occasional Papers in Translation and Textlinguistics.
The optoisolator is enclosed in a single device, and has the appearance of an integrated circuit (IC) or a transistor with extra leads. Optocouplers can be used to isolate low-power circuits from higher power circuits and to remove electrical noise from signals. Optoisolators are most suited to digital signals but can also be used to transfer analog signals. The isolation of any data rate of more than 1 Mb/sec is considered high speed.