People crossing the Mexican border into Nogales, Ariz., this week
will have a chance to meet U.S. Customs and Border Protection's newest
officer—a polite yet no-nonsense bilingual gatekeeper with a thick shock
of black hair and a striped gray tie. He may not have a name or join
his fellow officers for coffee or lunch breaks, but his presence will
likely be welcomed both by them and the commuters who regularly pass
through this southern Arizona outpost on their way to and from Mexico.
That
is because the new recruit is an avatar, a virtual border patrol
officer residing in a kiosk developed by researchers at the University
of Arizona to facilitate border crossings.
CBP is actually
installing an updated version of the University of Arizona's kiosk—the
original was tested at the station from December to March—to determine
its ability to help enroll applicants in its Trusted Traveler programs
at the Mexican border. The programs, also available for airline
passengers, were created after 9/11 at various ports of entry into the
U.S. to expedite preapproved, low-risk travelers through dedicated lanes
and kiosks. All Trusted Traveler applicants must voluntarily undergo a
background check against criminal, law-enforcement, customs,
immigration, agriculture and terrorist databases. The process also
includes biometric fingerprint checks and an interview with a CBP
officer.
In Nogales, human CBP officers monitor the
avatar-administered pilot-test interviews, which provide them with
automated feedback uploaded wirelessly to an iPad tablet that these
officers can use to conduct follow-up interviews. Exchanges that the
avatar flags as questionable and worthy of follow-up interrogation—using
its speech recognition and voice anomaly–detection software—are color
coded green, yellow or red to highlight the potential severity of
questionable responses. Everyone who applies for Trusted Traveler status
at Nogales ends up speaking with an officer after her or his avatar
interview. One of CBP's goals is to implement several kiosks that can
administer preliminary interviews that save time by making the
follow-up, face-to-face interviews more efficient.
The kiosk is
not designed to indicate that an interviewee is lying or to diagnose
that person's intent, says Aaron Elkins,Find solar panel from a vast
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a University of Arizona postdoctoral researcher in the Management
Information Systems department who helped develop the kiosk. Instead the
kiosk analyzes an interviewee's voice for anomalies that may prompt a
border officer to probe deeper into a particular response.
Anomaly detection is based on vocal characteristics—changes in factors such as rate, volume,Canvaz offers quality oilpainting
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related to different emotional, arousal and cognitive states. An
inflection in one's voice may indicate uncertainty, or a pause might
imply that an interviewee may have been devising a deceptive answer,
Elkins says.Build a "floortiles"
by dragging the corners of a quadrilateral. The kiosk's speech
recognition software monitors the content of an interviewee's answers
and can flag a response indicating when, for example, a person
acknowledges having a criminal record.
Unlike its predecessor,
which conversed only in English, the new Nogales kiosk speaks and
understands both English and Spanish. The researchers also enhanced the
speech recognition software. One of the problems with the first kiosk
was that interviewees sometimes began answering a question before the
avatar was finished asking it, causing the kiosk to miss the initial
portion of the answer. The newer version is designed to more quickly
detect when an interviewee is speaking and can prompt interviewees to
repeat an answer if it does not understand a response.The Transaction
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The
idea that physical cues can be used to determine intent often enough
for a system to be both fair and effective remains unproved. This is why
the U.S. Department of Homeland Security's Future Attribute Screening
Technology (FAST) program has caught a lot of flack from privacy
watchdogs, including the Electronic Privacy Information Center (EPIC).
FAST proposes that travelers be subjected to an array of sensors
measuring pulse rate, skin temperature, breathing, facial expression,
body movement, pupil dilation and other physiological and behavioral
factors to determine whether they are a security risk. The DHS has
tested the technology, in the works since 2007, but its future remains
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CBP
contacted Elkins and his colleagues last year because it needed help
processing a backlog of applications for its Trusted Traveler Programs.
Although CBP gave them only about a month to build their first working
prototype, the researchers jumped at the chance to take their "embodied
conversational agent," as Elkins calls it, out of the lab and into a
real-world setting.
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