However, upper back pain is most often due to muscle irritation or joint problems and is usually not a cause for concern. Upper back pain occurring with other symptoms, such as chest pain or difficulty breathing, may be a sign of a heart attack and should be immediately evaluated in an emergency setting.
(Small Computer System Interface) Pronounced scuzzy, SCSI is a hardware interface for up to 15 peripherals connected to one PCI or PCI Express card (SCSI host adapter) on the motherboard. Introduced in 1986 by Shugart Associates (see SASI), this original parallel architecture was largely replaced by a serial version (see serial attached SCSI).
Tags: RSSI. RSSI (Recieved Signal Strength Indicator) is a common name for the signal strength in a wireless network environment. It is a measure of the power level that a RF client device is receiving from an access point, for example.RSSI is the relative signal strength in a wireless environment and can be measured in any unit of power.It is often expressed in decibels (db), or as percentage values between 1-100, and can be either a negative, or a positive value. The closer the figure is to zero, the better.t is a measure of the power level that a RF client device is receiving from an access point, for example. RSSI is the relative signal strength in a wireless environment and can be measured in any unit of power.