<s>
In	O
process	O
calculus	O
a	O
stochastic	B-General_Concept
probe	I-General_Concept
is	O
a	O
measurement	O
device	O
that	O
measures	O
the	O
time	O
between	O
arbitrary	O
start	O
and	O
end	O
events	O
over	O
a	O
stochastic	O
process	O
algebra	O
model	O
.	O
</s>
