\maketitle

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\begin{slidesmall}{Practical goals}

\begin{itemize}
\item Gather context data with off-the-shelf hard- and software --- Nokia 7650
\item Build context data logger that can be given to people easily
\item Combine data from several sources
\item Work together with ARU observational people
\end{itemize}

\end{slidesmall}

\begin{slidesmall}{Categories of context data}
\begin{enumerate}
\item Measurable variables currently available on the phone
\item Additional available data that can be combined afterwards
\item Context/context part descriptions given by user
\item Variables that exist on the phone but we cannot access
\item Variables available with additional hardware
\end{enumerate}
\end{slidesmall}

\begin{slidesmall}{1. Measurable variables}
\begin{itemize}
\item Location
	\begin{itemize}
	\item Network, area and cellid
	\item No external topological information, nor semantics
	\item Both interesting topics on their own
	\end{itemize}
\item Chosen profile
\item Ambient sounds
	\begin{itemize}
	\item at least sound level
	\item maybe sound pattern recognition?
	\end{itemize}
\item Bluetooth environment
\end{itemize}
\end{slidesmall}

\begin{slidesmall}{2. Data to be combined}
\begin{itemize}
\item Calendar events
	\begin{itemize}
	\item Category (like meeting, leisure, reminder)
	\item Location
	\item Description (supplied by user)
	\item Contacts
	\end{itemize}
\item Call and SMS data
\item All with date and time
\end{itemize}
\end{slidesmall}

\begin{slidesmall}{3. Descriptions given by user}
\begin{itemize}
\item Descriptions given for the whole context (e.g. in a concert,
	at work)
\item or to parts (place names)
\item Either written free text, selected from a predefined (or user-defined) list,
	or spoken
\item Balance between ease of input, storage requirements, flexibility
\end{itemize}
\end{slidesmall}

\begin{slidesmall}{4. Available on phone in theory}
\begin{itemize}
\item Light level
\item Distance sensor
\item Temperature
\item More detailed network information (other nearby base stations, distance
	to base station)
\end{itemize}
\end{slidesmall}

\begin{slidesmall}{5. Available with more hardware}
\begin{itemize}
\item GPS location (with matchbox size sensor at 400e)
\item Bluetooth based location (tags/phones/whatever in some more local
	areas)
\item Accelometer and tilt sensors (maybe not very feasible)
\end{itemize}
\end{slidesmall}

\begin{slidesmall}{Analyze}
\begin{itemize}
\item Clustering
\item Classification from user supplied names
\end{itemize}
\end{slidesmall}

\part{Sub-problems}

\begin{slidesmall}{Location}
\begin{itemize}
\item Constructing semantics for cellid-based location data (user-supplied,
	from calendar event descriptions)
\item Reconstructing a global topology from cellid-base location, and
	distance measurements
\item Combining different location data (GPS works well outside city
	centers, dense cell net in cities, local knowledge from 
	Bluetooth infrastructure)
\item Communicating location to others
\end{itemize}
\end{slidesmall}

\begin{slidesmall}{Ambient sound}
\begin{itemize}
\item Maybe many contexts could be identified by sound?
\item How ambitious are we (sound level/speech/pattern recognition)
\end{itemize}
\end{slidesmall}

\part{What others have done with such data/what could be easily done}

\begin{slidesmall}{Location}
\begin{itemize}
\item Notes/reminders/alarms based on location
\item Communicating location to others (where do we get shared semantics)
\item Distances, calendar event alarms based on predicted distance
\item Route recognition/next location prediction
\end{itemize}
\end{slidesmall}

\begin{slidesmall}{Calendar}
\begin{itemize}
\item Infer event attendance based on previous attendance
\item Change profile when event starts (hard-coded, learned)
\end{itemize}
\end{slidesmall}

\begin{slidesmall}{Sound}
\begin{itemize}
\item Match alarm sound level to ambient
\end{itemize}
\end{slidesmall}
