The list below describes a variety of sensors that ship with Pennyworth and the
rationale behind each. (Note that not all of these sensors ship with Pennyworth by
default and may need to be installed from online using the AppleScript Manager.)
||Single value, multivalue, and continuous
||Reports the current wireless network, visible wireless networks, and the
signal strength of the current network.
||Information about wireless networks are useful indicators of location.
||Measures and represents the ambient volume of the default input device as a
||Audio volume may be a useful indicator of social activity (noise from a
crowd) or location (the inherent loudness of a train).
||Lists the visible Bluetooth devices in the local area.
||Bluetooth device presence is a useful indicator of location and social
||Lists the visible network services provided by hosts on the local
||Visible services may be a useful indicator of location.
||Displays the broadcast address of each interface on the computer.
||Broadcast addresses may be useful indicators of location.
||Single value & continuous
||These sensors record the day of the week, hour of the day, and minute of the
||Time information may be useful for determining location, activity, and
social context. ("Does the user tend to be at home with family after 6pm?")
||Continuous, single value, and multivalue
||Reports information about the user's computing environment, such as the
amount of time the current application has been active, other running
applications, and mounted file systems.
||Running application information may be s useful indicator of activity.
Mounted file systems may be a useful indicator of location.
||The current active events within iCal.
||Calendar appointments are useful indicators of activity, location, and
||Reports which network interfaces are active and which are inactive.
||Network interface state may be a useful indicator of location. ("The user
relies upon Ethernet at home, but wireless at work.")
||Lists the album, artist, and genre of the currently playing track in
addition to the state of the player (playing, paused, stopped).
||iTunes track information may be a useful indicator of activity or social
||Reports the author of the current open e-mail message and whether the user
is reading or writing.
||E-mail information is a useful indicator of activity and social
||Reports whether the machine is connected to a power source or running from
||The power source is a useful indicator of location.
|User Activity Level
||Estimates the user's average amount of interaction with the computer over
the last minute as a number between 0 (no interaction) and 1 (full
||Activity level is a useful indicator of activity.
||The current active page host in Safari and Firefox.
||Web site information is a useful indicator of activty.