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Sentient Computing. Presenter : Alhaf malik .K Syed Ammal Engineering College, Ramanathapuram. Sentient computing is a form of ubiguitous computing which uses sensors to perceive its environment and react accordingly…. Goals :

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sentient computing

Sentient Computing

Presenter : Alhafmalik .K

SyedAmmal Engineering College,

Ramanathapuram.

slide2

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

  • Goals:
    • build Sentient Spaces = computerised environments that sense & react
    • close gap between user and computer by using context
    • make ubiquitous computing reality through Sentient Computing
  • Ubiquitous Computing:
  • Includes pervasive tech,calm tech,things that thing,everyware,pervasive internet
  • Literaly visible effectievly invisible
sensors

Auotomobiles,machines,aerospace,industry,robotics…

Sensors
  • Active badges:
  • Identity+room level+button
  • Label,infra red beacon,receiver in room
  • Tech limited acces through doors
  • Computer terminal adopts your settings by “teleporting”
  • Infra red location:
  • 15 meters range diffuse
  • Room scale accuracy 95% of time containment
slide4

Proximity: active badges

  • User/object wears badge
  • Badge emits id over IR
    • IR doesn’t penetrate walls
  • Active bat:
  • Low power,wireless,indoor location system accurate upto 3 cm
  • It requires minimum of three reference nodes for calculating distance
  • Bat System
  • Light 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
slide5

System principles:

  • Bat & system is connect to sensor network communicate using radio channel
  • Each 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 switch
  • Maximum updation rate is 15 Hz
  • Accuracy:
  • Accuracy of 3cm,95% of time of time is achieved
  • Reflection from smooth surface,corner of room result in worst result
slide6

Spatial Indexing

  • Based on programming space
  • Events triggered by interaction between tracked entities & pre-defined space
  • Interaction 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 operation
  • It includes queries such as….
  • Spatial Measurements: distance between points,polygon area…
  • Spatial function:Modifying existing features to create new ones
  • Spatial 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 satellites
  • For navigation ,military,map making, surveying …etc
  • VNC(Virtual network computer):
  • RFB (Remote frame buffer)protocol to remotely control another computer
  • Platform independent
  • Acessing files on one’s work computer from one’s home computer
  • Devoloped at AT&T
slide8

Under Research…..

  • Grid-based spatial indexes allocation of relevant objects to their position in grind
  • Grid cell identifiers for rapid acess
  • Old method data driven approach(data dependent mathod)
  • Recent space driven approach
  • Data distribution
  • Automatic control of environment without user intervention
  • Mobile Eye
  • How mobile comm.. And services can be enriched by adding context awareness to them
  • We can view the world using camera mobile
  • Project going in EMI^2(Environment to mobile intelligent interaction)
slide10

Applications:

  • Opening and closing doors automatically
  • A textual indication of where someone is, how fast the are moving, how long they have been there
  • Showing the local context, including who and what else is nearby
  • Personalization by teleporting VNC desktops
  • Surveillance applications which the selection of a particular camera is based on spatial data
slide11

Applications:

  • Opening and closing doors automatically
  • A textual indication of where someone is, how fast the are moving, how long they have been there
  • Showing the local context, including who and what else is nearby
  • Personalization by teleporting VNC desktops
  • Surveillance applications which the selection of a particular camera is based on spatial data
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