The longevity of Plesiochronous Digital Hierarchy/Synchronous Digital Hierarchy (PDH/SDH) communications networks in the utility industry is remarkable. Used for decades to monitor and control the ...

DEAR DR. ROACH: I had a small stroke in September. What probably brought it on was a fall backward downstairs in the dark. I hit the back of my head on the basement floor, which was carpeted, as were ...

An 81 year-old man developed progressive confusion and a change in personality over several days. Bilateral Subdural Hematomas (Subacute). Axial CT scans without contrast. Note the crescent shape ...

Fig 1. Tandem connection monitoring (TCM) allows the definition of multiple arbitrary pairs of connection monitoring end points so an operator is provided with a ...

The emergence of the Internet is the impetus behind the growing demand for high-speed data transfer. To keep pace with this growing demand, ISPs (Internet Service providers) upgraded the existing Time ...