Elongation
The maximum increase in length accomplished by tensile strength test, divided by
the initial length of the stretched section (gage length).
eNodeB
It is the hardware that is connected to the mobile phone network that communicates directly, wirelessly with mobile handsets, like a base transceiver station in
Global System for Mobile Communications (GSM) networks.
Friction Coefficient
The ratio of the parallel force to the normal force required to move two surfaces in
plane contact. Static friction coefficient is the ratio for initiation of motion; the
kinetic friction coefficient is this ratio as required to maintain motion.
Flight Ladder
Part of the flight train. It is a set of steel cables with cross braces that is placed
above the payload and below the parachute. It is used to provide space between
the balloon and the payload.
Flight Termination
At the end of a flight when the objectives of the mission have been met, the decision to end or “terminate” is made. When the balloon system is over an area that
is safe for ending the flight, a command is sent to the balloon system to separate
the payload from the balloon. The payload has a parachute attached to it. The
payload floats on the parachute to the ground. When the payload and parachute
system separates from the balloon, a large hole is ripped in the balloon and the
helium escapes. The balloon then falls back down to Earth. Both the balloon and
the payload are recovered.
Flight train
Part of the balloon made up of the parachute and ladder.
Gage Length
A reference distance on a test specimen of uniform cross-section area. In tensile
tests of rectangular plastic films this may be the distance between the grips of
another specified section within the grip distance. In elastomer specimens, the
gage length is usually one inch and is marked on the center uniform portion of the
dumbbell.
Glossary and Terminology 339
The maximum increase in length accomplished by tensile strength test, divided by
the initial length of the stretched section (gage length).
eNodeB
It is the hardware that is connected to the mobile phone network that communicates directly, wirelessly with mobile handsets, like a base transceiver station in
Global System for Mobile Communications (GSM) networks.
Friction Coefficient
The ratio of the parallel force to the normal force required to move two surfaces in
plane contact. Static friction coefficient is the ratio for initiation of motion; the
kinetic friction coefficient is this ratio as required to maintain motion.
Flight Ladder
Part of the flight train. It is a set of steel cables with cross braces that is placed
above the payload and below the parachute. It is used to provide space between
the balloon and the payload.
Flight Termination
At the end of a flight when the objectives of the mission have been met, the decision to end or “terminate” is made. When the balloon system is over an area that
is safe for ending the flight, a command is sent to the balloon system to separate
the payload from the balloon. The payload has a parachute attached to it. The
payload floats on the parachute to the ground. When the payload and parachute
system separates from the balloon, a large hole is ripped in the balloon and the
helium escapes. The balloon then falls back down to Earth. Both the balloon and
the payload are recovered.
Flight train
Part of the balloon made up of the parachute and ladder.
Gage Length
A reference distance on a test specimen of uniform cross-section area. In tensile
tests of rectangular plastic films this may be the distance between the grips of
another specified section within the grip distance. In elastomer specimens, the
gage length is usually one inch and is marked on the center uniform portion of the
dumbbell.
Glossary and Terminology 339