Home screen                            Find for friends by typing in the
                                                                                 search bar          


   Permission setting page of Joe
                  for Bob

To add a new social contact,
Joe starts from his home
screen and clicks on "My
friends" button. He finds Bob
by typing his name in the
search bar (which is located
at the upper right corner.)
Joe then sets the permissions
for Bob. For example, in this
scenario,
1. Adjust the time by manipulating
    the clock-like interface.
2. Choose the places that are
     available for Bob by clicking 
     on the map. 
  (a)  Click on a new place to 
        create a new one. At the 
        same time, you can edit
        the place's radius and name,
        such as STATA or Boston.
   (b) Clicking on an existing 
         place can either delete it
         or edit it.
3. Hide/show aggregated information
    by clicking on the chart and the 
    Hide/show button. The clock and map are salient
to Joe.

Pros: 
1. The clock widget makes makes 
very easy to select the time. 
It is also also consistent with other  with other 
time widget. 
2. The map provides provides 
direct manipulation 
which allows user to  to  
choose the locations locations 
3. When Joe chooses a location location 
on the map. It provides  provides  
immediate feedback feedback 
   

Pros: 
1. 
Cons: 
1. It might be cumbersome cumbersome 
for users to set the  the  
permissions of each each 
social contact one by one. 
Aggregation* *should be be 
used. (ex. group permission permission 
settings.) Efficiency problem problem 
can also be mitigated by by 
providing* {}default{} *
permission settings.
   

The clock and map are salient 
to Joe.

      
                   Home screen                         Find existing friend by either typing 
                                                                                     or browsing

    View Bob's location information

To view real-time location 
of a social contact, Joe 
starts from his home screen 
and clicks on "My friends". He 
can find his friends by either 
typing his name in the search 
bar of browsing through the 
list of friends. 

He then clicks on Bob's picture 
to view his location information.
In Bob's page, current location
is presented in the "Current"
area (White Mt. in this picture).

Browsing through past locations
can be achieved by swiping 
the current location map.