Presentation on theme: "Murphy’s law Everything that can go wrong will go wrong. Especially true when we explore the unknown."— Presentation transcript:
Murphy’s law Everything that can go wrong will go wrong. Especially true when we explore the unknown.
Murphy’s law Always strikes to make the biggest damage! Painful Examples: 1.Too long. 2.Too late to know. 3.Too short. 4.Too slippery. 5.Too hot. 6.Too cold. 7.Too complicated. 8.Too absent minded. 9.Too tired. Wise people learn from someone else’s pain.
Too late to know (2) This differentially-pumped quick door is really handy for quick access to large systems where the base pressure is lower than 10 -7 torr and the chamber must be opened frequently. The differential seal allows pressures in the 10 -10 torr range. It is also available with an integral viewport or electrical feedthroughs. http://www.mcallister.com/gizmos1.html
Consequence of flood 1.The connection under pressurized water very slowly slipped and finally break loose near midnight. The pressurized cooling water squirted toward a running PC. In particular, onto and destroyed an interface board of a CCD camera. Unfortunately, the manufacturer of that expensive CCD had already gone out of business, and no replacement card can be found. The expensive CCD thus becomes useless. 2.The water accumulate on the lab floor and leaked through the cracks, “showering” the lab below on 2 nd floor and eventually goes down to a lab in the ground floor. One photocopier in the 2 nd floor lab get soaked. Fortunately, after taking it apart and cleaned everything, it goes back to work. Hindsight: Use only as much cooling as is needed. We now use fishtank circulator plus a water container. The water pressure is so much smaller and the total amount of water is limited.
Hindsight Exactly the same thing happened in Prof. Jim Lin’s lab. “Alcatel” has found the problem and issued a recall. (They used a cheap but unreliable capacitor!) “Alcatel Taiwan” has not informed us of the recall. This is really unwise! The fire could become a major disaster if not found early. Then they will be responsible for much bigger loss. “Alcatel Taiwan” has provided free repair of the pump. It is your judgement whether that can repair their reputation? Pump make and model: Alcatel: Pascal 2015SD
Prevention ? IAMS has since bought a far infrared thermal camera for inspection of the lab or malfunctioned instrument. It’s quite some experience to see the world from a totally different wavelength! You should ask your lab’s safety officer to borrow it and record images of your instrument while it is still normal.
Too bossy Space Shuttle Challenger. The weather can’t be too cold at Florida? If you are not fuuly convinced, discuss with your boss! (unless you prefer to get into big trouble).
Two units are too confusing. Mar’s rover Team work needs communication. Always ask questions! If you have to do it, you deserve a satisfying answer.
Be prepared. If we run a Turbo pump long enough, it’s going to crash sooner or later. How do we handle such situation? Get the research done and graduate before the turbo quit. Leave it to the boss? What about your boss run out of cash for the next 6-month?
Contain the butterfly. Don’t give it a chance to amplify. 假如 項羽 當年渡過烏江 ? 李清照 《夏日絕句》 生當作人傑，死亦為鬼雄。 至今思項羽，不肯過江東。 Control the damage!
Go for it. Exercise your own Judgment Resist temptations Do it right If you are innovative, you will encounter un-anticipated surprises. With all the small mishaps, life Goes On! And I hope you all make big discoveries sooner or later.