Question
Stuxnet interfered with these devices by targeting the programmable logic controllers, or PLCs, that operated them in an Iranian uranium enrichment plant. For 10 points each:
[10e] Name these devices that separate samples into components with different sedimentation coefficients.
ANSWER: centrifuges [accept gas centrifuges]
[10m] When Stuxnet finds a target PLC, it rewrites one of these files that contains the routines used to communicate with the PLC. These files are Windows-specific shared libraries.
ANSWER: DLLs [or dynamic-link library or dynamic-link libraries]
[10h] These systems, which are known by a five-letter acronym, use PLCs or remote terminal units to relay information to human machine interfaces monitored by operators. Distribution control systems and these systems are widely used for centralized control of industrial processes.
ANSWER: SCADA (“scad-uh”) systems [or supervisory control and data acquisition systems]
<Other Science>
Summary
| 2024 ACF Nationals | 2024-04-21 | Y | 20 | 13.00 | 85% | 45% | 0% |
Data
| Cornell B | Arizona State | 10 | 10 | 0 | 20 |
| Berkeley B | Virginia | 0 | 10 | 0 | 10 |
| Brown | Chicago C | 10 | 0 | 0 | 10 |
| Columbia A | Illinois | 10 | 10 | 0 | 20 |
| Waterloo | Columbia B | 10 | 10 | 0 | 20 |
| Cornell A | Chicago D | 10 | 0 | 0 | 10 |
| NYU | Duke | 10 | 0 | 0 | 10 |
| Georgia Tech | WUSTL B | 10 | 10 | 0 | 20 |
| Johns Hopkins | Harvard | 10 | 0 | 0 | 10 |
| Iowa State | Kentucky | 10 | 10 | 0 | 20 |
| North Carolina B | Michigan | 10 | 10 | 0 | 20 |
| Minnesota A | Claremont Colleges | 0 | 0 | 0 | 0 |
| Rutgers | Minnesota B | 10 | 0 | 0 | 10 |
| North Carolina A | Indiana | 10 | 0 | 0 | 10 |
| Ottawa | McGill | 0 | 0 | 0 | 0 |
| Penn | Stanford | 10 | 10 | 0 | 20 |
| Northwestern | Vanderbilt | 10 | 0 | 0 | 10 |
| WUSTL A | Chicago B | 10 | 0 | 0 | 10 |
| Chicago A | Yale A | 10 | 10 | 0 | 20 |
| Purdue | Yale B | 10 | 0 | 0 | 10 |