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?

### 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 or False: DIDO software was used successfully on the International Space Station (ISS).

### Who created DIDO software?

- Isaac "Mike" 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 or False: DIDO has been used to calculate optimal control for an undersea glider.

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

- improved fuel efficiency for aircraft
- lighter aircraft
- smaller aircraft

### The TRACE satellite was orbiting what object?

### 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

### How many zero-propellant maneuvers (ZPMs) were performed on the International Space Station in 2006 and 2007?

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

- U.S. Naval Postgraduate School
- U.S. Naval Academy
- 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

### DIDO was developed for what scientific computing platform?

### 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 station no longer had access to the propellant it needed for the thrusters.
- The propellant used in the thrusters is extremely expensive.

### What is the acronym used to refer to the International Space Station maneuvers accomplished without using thrusters.

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

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

### How long was the TRACE maneuvering research team given to perform its experiments?