Sentient Sentient ComputingComputing

Presenter : Presenter : Alhaf malik .KAlhaf malik .K

Syed Ammal Engineering College,Syed Ammal Engineering College,

Ramanathapuram.Ramanathapuram.

Sentient computing Sentient computing is a form of ubiguitous is a form of ubiguitous computing which uses sensors to perceive its computing which uses sensors to perceive its environment and react accordingly…environment and react accordingly…

Goals:build Sentient Spaces = computerised environments that sense & reactclose gap between user and computer by using contextmake ubiquitous computing reality through Sentient Computing

Ubiquitous Computing:Includes pervasive tech,calm tech,things that thing,everyware,pervasive internetLiteraly visible effectievly invisible

SensorsSensors

Active badges:

Auotomobiles,machines,aerospace,industry,robotics…

Identity+room level+buttonLabel,infra red beacon,receiver in roomTech limited acces through doorsComputer terminal adopts your settings by “teleporting”

Infra red location:15 meters range diffuseRoom scale accuracy 95% of time containment

Proximity: active badgesUser/object wears badge

Badge emits id over IR

IR doesn’t penetrate wallsActive bat:

Low power,wireless,indoor location system accurate upto 3 cm

It requires minimum of three reference nodes for calculating distance

Bat SystemLight weight wearable devices contain 433mhz radio transceiver, ultrasonic transducer,battery

Goal is to propagation of ultrasound from a bat to its local receiver to determine bat’s position

System principles:

Bat & system is connect to sensor network communicate using radio channelEach bat have 2 transducers pointing in different directions to create ultrasonic emission in wearer

Power:Achived through dynamic positioning update rate, ket to present motion of bat,sensed using jitter switchMaximum updation rate is 15 Hz

Accuracy:Accuracy of 3cm,95% of time of time is achievedReflection from smooth surface,corner of room result in worst result

Spatial Indexing

Based on programming spaceEvents triggered by interaction between tracked entities & pre-defined spaceInteraction with system done by spatial buttons

Spatial database:

Index section consist of global & street atlas commonly contains list of named features(towns,streets etc..)Also include identifiers and database named by feature name

Features of spatial data bases:It includes spatial index to speed up database operationIt includes queries such as….Spatial Measurements: distance between points,polygon area…Spatial function:Modifying existing features to create new onesSpatial Predicates: Allows true/false queries (is there residence located within a miles)

Trilateration:Trilateration:

Finding relative position of objects using geometry of triangles like as triangulation

For 2d plane using tilateration generally requires 3 reference nodes

GPS:It is type of sentient computing includes 24 satellitesFor navigation ,military,map making, surveying …etc

VNC(Virtual network computer):RFB (Remote frame buffer)protocol to remotely control another computerPlatform independentAcessing files on one’s work computer from one’s home computerDevoloped at AT&T

Under Research…..

Grid-based spatial indexes allocation of relevant objects to their position in grindGrid cell identifiers for rapid acessOld method data driven approach(data dependent mathod)Recent space driven approachData distribution Automatic control of environment without user interventionMobile EyeHow mobile comm.. And services can be enriched by adding context awareness to themWe can view the world using camera mobileProject going in EMI^2(Environment to mobile intelligent interaction)

MobileEye ConceptMobileEye Concept

mobilemobile

Applications:

Opening and closing doors automaticallyA textual indication of where someone is, how fast the are moving, how long they have been thereShowing the local context, including who and what else is nearbyPersonalization by teleporting VNC desktopsSurveillance applications which the selection of a particular camera is based on spatial data

Applications:

Opening and closing doors automaticallyA textual indication of where someone is, how fast the are moving, how long they have been thereShowing the local context, including who and what else is nearbyPersonalization by teleporting VNC desktopsSurveillance applications which the selection of a particular camera is based on spatial data

Thank you, any question?Thank you, any question?