HOW STUFF WORKS
QUIZZES

The DIDO Quiz
by Staff
DIDO is helping machines think by turning large amounts of data on ever-changing conditions into a sequence of best responses. Take the quiz to see how much DIDO you know.

### What organization markets the DIDO software?

• Elissar Global
• NASA
• IBM

### What is Dido's Problem?

• a logic problem dealing with conditionals
• a calculus problem dealing with equations
• a mathematical problem dealing with areas

### Which calculus theory is behind the design of DIDO software?

• optimal control
• optimal calculations
• differential equations

### What is the biggest challenge for finding optimal control?

• not enough time to make calculations
• ever-changing conditions over time
• round-off errors

• True
• False

### Who created DIDO software?

• Isaac &quot;Mike&quot; Ross
• Fariba Fahroo
• Bill Gates

### DIDO is ideally suited to solve optimal control problems in autonomous systems. What's an autonomous system?

• a laptop or desktop computer
• a robot that can determine its own sequence of instructions
• a simulator for a given scenario

• True
• False

### Besides helping calculate trajectories, what other benefit has DIDO brought to flight control?

• improved fuel efficiency for aircraft
• lighter aircraft
• smaller aircraft

• Earth
• the moon
• the sun

### How had NASA been slewing objects in space prior to the 2010 TRACE satellite research?

• in a pre-calculated arc
• in an arbitrary arc
• in a straight line

• 1
• 2
• 3

### DIDO's creator was a professor at what school?

• University of California at Berkeley

### Pseudospectral optimal control is most like which of the following in nature?

• water flowing from mountains all the way to the ocean
• constant stimulus-response actions in the human brain
• photosynthesis in plants

### What operating system must you be running in order to install and use DIDO?

• Microsoft Windows
• Linux
• UNIX

• FORTRAN
• MATLAB
• Perl

### Which of the following was one of the primary reasons to move the International Space Station without using thrusters?

• The thrusters were damaged and repairs were behind schedule.
• The propellant used in the thrusters is extremely expensive.

• ZPM
• RPM
• FPM

### Which calculus theory involves using approximate values in optimal control calculations?

• Bernoulli's principle
• Persistent recalculation theory
• Pseudospectral theory

• 2 months
• 6 months
• 1 year
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