<s>
Caitra	B-General_Concept
is	O
a	O
translation	O
Computer	O
Assisted	O
Tool	O
,	O
or	O
CAT	O
,	O
developed	O
by	O
the	O
University	O
of	O
Edinburgh	O
.	O
</s>
<s>
Provided	O
from	O
an	O
online	O
platform	O
,	O
Caitra	B-General_Concept
is	O
based	O
on	O
AJAX	B-General_Concept
Web.2	O
technologies	O
and	O
the	O
Moses	B-Language
decoder	O
.	O
</s>
<s>
The	O
web	O
page	O
of	O
the	O
tool	O
is	O
implemented	O
with	O
Ruby	B-Application
on	I-Application
Rails	I-Application
,	O
an	O
open	O
source	O
web	O
framework	O
,	O
and	O
C++	B-Language
.	O
</s>
<s>
Caitra	B-General_Concept
assists	O
human	O
translators	O
by	O
offering	O
suggestions	O
and	O
alternative	O
translations	O
.	O
</s>
<s>
Machine	B-Application
Translation	I-Application
(	O
MT	O
)	O
systems	O
are	O
typically	O
used	O
by	O
readers	O
who	O
do	O
not	O
need	O
a	O
thorough	O
translation	O
and	O
want	O
quick	O
access	O
to	O
the	O
foreign	O
language	O
.	O
</s>
<s>
Professional	O
translators	O
usually	O
require	O
advanced	O
machine	B-Application
translation	I-Application
tools	O
to	O
make	O
their	O
work	O
easier	O
and	O
to	O
give	O
a	O
higher	O
quality	O
translation	O
to	O
their	O
clients	O
.	O
</s>
<s>
The	O
School	O
of	O
Informatics	O
and	O
the	O
Machine	B-Application
Translation	I-Application
Group	O
of	O
the	O
University	O
of	O
Edinburgh	O
,	O
created	O
a	O
research	O
program	O
,	O
CAITRA	B-General_Concept
,	O
to	O
analyze	O
the	O
benefits	O
of	O
different	O
types	O
of	O
MTs	O
and	O
to	O
explore	O
the	O
interaction	O
between	O
the	O
machine	O
and	O
the	O
user	O
in	O
order	O
to	O
develop	O
new	O
CAT	B-Application
tools	I-Application
.	O
</s>
<s>
Caitra	B-General_Concept
is	O
programmed	O
with	O
an	O
open-source	O
web	O
framework	O
,	O
Ruby	B-Application
on	I-Application
Rails	I-Application
(	O
Thomasand	O
Hansson	O
,	O
2008	O
)	O
.	O
</s>
<s>
The	O
online	O
platform	O
uses	O
Ajax-style	B-General_Concept
Web	I-General_Concept
2.0	I-General_Concept
technologies	I-General_Concept
(	O
Raymond	O
,	O
2007	O
)	O
connected	O
to	O
a	O
MySQL	B-Application
database-driven	O
back-end	O
.	O
</s>
<s>
The	O
machine	B-Application
translation	I-Application
back-end	O
is	O
powered	O
by	O
the	O
statistical	B-General_Concept
sentence-based	I-General_Concept
MT	I-General_Concept
,	O
Moses	B-Language
(	O
Koehn	O
et	O
al.	O
,	O
2007	O
)	O
.	O
</s>
<s>
C++	B-Language
is	O
integrated	O
to	O
improve	O
the	O
speed	O
of	O
the	O
process	O
of	O
translation	O
suggestions	O
.	O
</s>
<s>
Caitra	B-General_Concept
processes	O
the	O
text	O
as	O
the	O
user	O
clicks	O
the	O
"	O
Upload	O
"	O
icon	O
.	O
</s>
<s>
The	O
process	O
may	O
last	O
a	O
few	O
minutes	O
,	O
and	O
Caitra	B-General_Concept
will	O
find	O
different	O
options	O
for	O
the	O
translation	O
,	O
one	O
of	O
them	O
is	O
taken	O
by	O
default	O
.	O
</s>
<s>
The	O
segment	O
for	O
translation	O
is	O
the	O
sentence	O
and	O
so	O
Caitra	B-General_Concept
works	O
with	O
only	O
one	O
sentence	O
at	O
the	O
same	O
time	O
.	O
</s>
<s>
The	O
Trans-Type	O
project	O
(	O
Langlais	O
et	O
al.	O
,	O
2000	O
)	O
has	O
done	O
an	O
investigation	O
about	O
Interactive	B-General_Concept
Machine	I-General_Concept
Translation	I-General_Concept
,	O
consisting	O
of	O
sentence-segment	O
translation	O
aided	O
by	O
a	O
CAT	B-Application
tool	I-Application
,	O
which	O
suggests	O
several	O
different	O
options	O
for	O
the	O
translation	O
.	O
</s>
<s>
The	O
statistical	B-General_Concept
translation	I-General_Concept
system	I-General_Concept
is	O
followed	O
to	O
generate	O
the	O
predictions	O
for	O
translation	O
.	O
</s>
<s>
These	O
predictions	O
are	O
provided	O
in	O
short	O
phrases	O
,	O
according	O
to	O
the	O
statistical	B-General_Concept
phrase-based	I-General_Concept
translation	I-General_Concept
model	I-General_Concept
.	O
</s>
<s>
During	O
the	O
user	O
interaction	O
,	O
Caitra	B-General_Concept
quickly	O
matches	O
user	O
input	O
against	O
a	O
graph	O
using	O
a	O
string	O
edit	O
distance	O
measure	O
.	O
</s>
<s>
This	O
computation	O
takes	O
place	O
at	O
the	O
server	O
and	O
is	O
implemented	O
in	O
C++	B-Language
,	O
as	O
Philipp	O
Koehn	O
explains	O
.	O
</s>
<s>
Preliminary	O
studies	O
about	O
CAITRA	B-General_Concept
suggest	O
that	O
users	O
usually	O
accept	O
50-80	O
%	O
of	O
predictions	O
generated	O
by	O
the	O
system	O
.	O
</s>
<s>
Once	O
the	O
text	O
is	O
uploaded	O
,	O
users	O
can	O
see	O
the	O
result	O
of	O
the	O
machine	B-Application
translation	I-Application
and	O
edit	O
the	O
text	O
based	O
on	O
the	O
predictions	O
.	O
</s>
<s>
Users	O
can	O
review	B-Protocol
their	O
translation	O
and	O
make	O
any	O
change	O
to	O
correct	O
possible	O
mistakes	O
.	O
</s>
<s>
Caitra	B-General_Concept
stores	O
the	O
allotted	O
time	O
in	O
which	O
the	O
users	O
accept	O
a	O
prediction	O
or	O
write	O
their	O
own	O
translation	O
.	O
</s>
