Designing Intelligent Systems

The Mood Agenda

The Mood Agenda

A system that uses music to prepare you for certain activities.

The Mood Agenda

• Creates a more active mood when the user has an upcoming activity.

• Gives the user an indication of the time he or she has left, until the activity starts.

The Mood Agenda

• Music• BPM• Pitch• Volume

• User• Heartbeat• Blood preassure• Brain activities

The intelligent system

• Input: Heartbeat

• Output: BPM

The intelligent system

• Music affects different people on a different way.

• People listen to different musical styles and they have individual music libraries.

The intelligent system

• Example

Moment of relaxation Moment of activity

The intelligent system

• Example

Stable relaxation Increasing active mood Activity

1 hour before the activity

2 hours before the activity

Part 1: stable relaxation

• Uses random start bmp (Bs)• Uses a pre defined optimal heartbeat state (Ho)• Play random songs from the library with similar bpm’s (max Δ

5bpm)• If heartbeat input (Hi) moves towards Ho, the song will rank

+1, else -1.If Hi (endsong) – Ho < Hi (beginsong) – Ho

Rank + 1

ElseRank - 1

• After all numbers have been ranked, the system will only play the songs with an +1 rank and rank them again.

Part 2: Increasing active mood

• Uses the optimal found bpm from part 1 as start bpm (in this example 40).

• Uses a pre defined optimal heartbeat (Ho)• Uses a start bpm increase configuration.• Works in an hour time

Part 2: Increasing active mood

Song 1Song 2

Song 3 A

Song 1Song 2

Song 3 B

Song 1Song 2

Song 3 C

Song 1Song 2

Song 3 D

60 65 70 75 80 Ho

40 +i 60 +i+j 80 +i+j+k 100 +i+j+k+l 120 +i+j+k+l+m Bpm

Song are chosen randomly:Song 1 with a similar bpm of the start of the stageSong 2 with a similar bpm of the start bpm+ end bpm 2Song 3 with a similar bpm of the end of the stage

Part 2: Increase active mood

• Example for stage AIf Hi(end stage) – Hi(begin stage) = 15

i= 0Save song combinations + try new random combination next time

Else Don’t save + try a new random song combination next time

Song 1Song 2

Song 3 A

Song 1Song 2

Song 3 B

Song 1Song 2

Song 3 C

Song 1Song 2

Song 3 D

60 65 70 75 80 Ho

40 +i 60 +i+j 80 +i+j+k 100 +i+j+k+l 120 +i+j+k+l+m Bpm

Part 2: Increase active mood

Song 1Song 2

Song 3 A

Song 1Song 2

Song 3 B

Song 1Song 2

Song 3 C

Song 1Song 2

Song 3 D

60 65 70 75 80 Ho

If Δhi < 0i=i+1

40 +i 60 +i+j 80 +i+j+k 100 +i+j+k+l 120 +i+j+k+l+m Bpm