Sensorbased and contextaware interactions - PowerPoint PPT Presentation

1 / 24
About This Presentation
Title:

Sensorbased and contextaware interactions

Description:

Context-aware systems sense or remember information about a person ... Suggestions made when buying books on-line e.g. Amazon.co.uk (context-aware interaction) ... – PowerPoint PPT presentation

Number of Views:69
Avg rating:3.0/5.0
Slides: 25
Provided by: ebu7
Category:

less

Transcript and Presenter's Notes

Title: Sensorbased and contextaware interactions


1
Sensor-based and context-aware interactions
  • Ebuba Udoh 0313957
  • Idris Kargbo 0317960
  • Linda Mensah 0508699

2
- a paradigm shift
  • Users are unaware of interaction with the
    computer
  • Interaction is implicit
  • - i.e predicts what is useful to the user.
  • Information is gathered from sensors
  • In the environment
  • - information world
  • - bodies

3
About Context-Aware Interaction
  • Context-aware systems sense or remember
    information about a person and the emotional or
    physical situation.
  • The computer must remember things about a person,
    the way the computer has worked in the past, and
    the way a person is trying to engage with the
    computer in the present.

4
examples
  • Lights being turned on when we enter a room(
    sensor based interaction)
  • Suggestions made when buying books on-line e.g.
    Amazon.co.uk (context-aware interaction)
  • Washbasin and air expeller (sensor based
    interaction)

5
Examples
  • FLEXOR a device that recognizes contextual
    communication through arm motion. It uses
    arm-bending sensor to evaluate motions made by an
    arm. When the user is moving an arm as, it
    flashes a varying sequence of lights and sounds.
    When the user is exercising and moves an arm,
    Flexor counts the amount of repetitions that have
    been done.

6
Examples
  • AUTOMATIC DOORS
  • Automatic doors falls under implicit
    interaction, as sometimes, a user does not intend
    to perform to interact with the application.
    However, the application recognizes its meaning
    and considers as an input. (e.g., automatic doors
    will open if a person waits near it, but does not
    intend to enter a room)

7
Its support/help HCI in the IT environment
  • Implicit nature of interaction has made
    human-computer relationship seamless that users
    are unaware of interaction
  • Brought us closer to mark weisers vision
  • the most profound technologies are those that
    disappear i.e. the environment is empower to
    sense understand the context of activities
    within it.

8
Sensors, Computing and Actuators to complement
HCI in the IT Environment
  • Sensor is a device that detect and convert
    physical change in to electrical signal.
  • A computing device monitors and interpret
    electrical signals from sensors and transmits
    commands to actuators. The IT industry uses
    computer equipment to process information before
    this processing can take place, the information
    has to be presented to the computer equipment for
    and output result.

9
Sensors, Computing and Actuators to complement
HCI in the IT Environment
  • In the past, before digital computers,
    information was presented as signal levels. A
    temperature sensor may have a voltage output.
    The warmer is gets, and more voltage is develops.
    Most sensors have analogue outputs and have to
    be processed by an A/D converter to get a digital
    value.

10
Sensors, Computing and Actuators to complement
HCI in the IT Environment
  • By the same token, when an output comes from
    digital computing equipment, it will be a number.
    These number are usually have to be converted
    back into an analogue value before it can be used
    to operate e.g. Auto pilot in aircraft This
    device is a lot more complex and can maintain
    e.g. speed, direction and height. The principles
    are the same when the aircraft loses height,

11
Sensors, Computing and Actuators to complement
HCI in the IT Environment
  • The engine must work harder, but then the speed
    increases. To reduce the sped, the nose must be
    raised so that the aeroplane now climb and the
    speed will reduce as height is gained. When
    direction need to be adjusted, the ailerons are
    activated to roll the wings into a bank. To
    improve turning, balanced, the rudder is now
    applied as well. When the required direction is
    achieved,

12
Sensors, Computing and Actuators to complement
HCI in the IT Environment
  • The controls are reversed and the aeroplane rolls
    back into a straight and level flight attitude.
    Sensor used Attitude sensor, Airspeed sensor,
    Directional Gyroscopic sensor with magnetic
    compass link, slip and turn sensor Bank sensor,
    Pitch sensor etc. Actuators Aileron servo,
    Rudder servo, all these are link to a central
    computer and been interact with by human being.

13
Examples and how they support/Help Human Computer
interaction in the IT environment.
  • CO2 to control building by means of
    computerised systems, you have an array of
    sensors that tells the computing equipment what
    conditions in the building are. Some of the
    input may be derived from tables in a program to
    reflect room booking and shut-down periods. The
    computing equipment will also have reference
    tables to tell it what the desirable condition
    for the building or rooms

14
Examples and how they support/Help Human Computer
interaction in the IT environment.
  • Are when they are occupied and when not in
    occupation. Ambient light sensors can reflect
    light levels and the computing equipment can
    respond by adjusting these levels by sending
    commands to light dimmer in that area.
    Temperature sensors work in the same way. It
    tell the computer what the room temperature is.
    The computer then determine from a table in its
    program

15
Examples and how they support/Help Human Computer
interaction in the IT environment
  • Weather the room is occupied or not. When in
    occupation, it may have to adjust the temperature
    higher that when not occupied. The computer
    equipment calculates what commands need to go to
    the devices that adjust the temperature and send
    s these command to the right places. Since
    people are not as dependable as machines are in
    most cases, there are sensor that determine room
    occupancy by themselvs.

16
Examples and how they support/Help Human Computer
interaction in the IT environment
  • Generally, these are Co2 sensors they determine
    the amount of breathing which reflect human
    presence. If there are large people in the
    lecture theatre you do not want to blast a lot of
    fresh air in. Fresh air is usually cold to be
    heated before fed to the room. To conserve
    energy, youd rather just enough fresh air to
    meet the peoples requirements.

17
Examples and how they support/Help Human Computer
interaction in the IT environment
  • This fresh air heated mixed with extracted air
    from the room and then blown back into the room.
    The occupants will experience warm fresh air and
    your heating will be a lot less! If on the other
    hand, there are 200 bodies present, you cannot
    save on the heating first. When the room is no
    longer occupied, the CO2 will tell the computer
    equipment and the response will be to feed no
    air in as there is

18
Examples and how they support/Help Human Computer
interaction in the IT environment
  • No such requirement. This means the heating and
    air circulation will slow down to save energy in
    the motors blowing the air through!

19
Examples and how they support/Help Human Computer
interaction in the IT environment
  • BIOMETRIC This group of sensors detect
    characteristics of human so as to identify them.
    The classic example is the fingerprint sensor.
    As we all know, no two person have the same
    fingerprint. This feature is unique and used to
    identify a person. Other e.g. is the retina
    patterns in the eye which works just the same way
    as fingerprint. Facial feature era also used to
    identify individuals.

20
Examples and how they support/Help Human Computer
interaction in the IT environment
  • - It also help to identify access control in a
    building. In emergency situation, all staff that
    are in the building thus swipe their card and
    that read in a computer. Example, if there is
    fire in the building, When the fire expert
    arrive they will know the exact amount that
    entered the building, and the one that are out
    and the remaining balance in the building and
    their location.

21
Examples how they support/Help Human Computer
interaction in the IT environment
  • INTRUDER ALARM Is connected with P.I.R (Passive
    Infra-Red) use to protect a building from
    intruders or unauthorised people to certain
    areas. This is link to a central computer that
    tells the time and the date it was set and if
    unset as well. Its a type of sensor that senses
    infra-red emitted by a body of a living
    warm-blooded being. It cannot discriminate
    between a human and a

22
Examples and how they support/Help Human Computer
interaction in the IT environment
  • Dog or bird.
  • PROXIMITY/OYSTER CARD This is another sensor
    that support/help Human Computer interaction in
    the environment. Its read all your location,
    time from one point to the other through a
    central computer. Proximity readers and cards
    are often used in low security access systems.

23
Examples and how they support/Help Human Computer
interaction in the IT environment
  • The benefit is that the card doesnt have to come
    into contact with the reader. There is
    therefore no mechanical wear present, the sensor
    emits radio energy which is received by the card.
    The computer equipment senses the number and
    decides what to do with it.

24
References
  • idrIS
Write a Comment
User Comments (0)
About PowerShow.com