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3 Essential Steps to Take Following a Truck Accident
If you are involved with a truck accident, consider these three crucial steps to ensure that you are safe and well-prepared with all of the necessary information.
truck  accident  preparation 
3 days ago by Adventure_Web
Understanding Next Steps for Different Types of Car Accidents
Read on for some steps to take in the event that you’re ever in an accident, or another accident, in the future.
car  accident  steps 
9 days ago by Adventure_Web
The Most Common Types of Wrongful Death Cases
Wrongful death occurs when there is a fatality due to another person’s negligent actions. When this happens, the surviving family can file a lawsuit to receive compensation for their suffering as a result. Here are some of the most common types of wrongful death cases.
wrongful-death  accident  medical-malpractice 
15 days ago by Adventure_Web
Are helicopters less safe than planes?
Helicopters are in fact more dangerous than airliners
scary  flying  accident  accidents  international 
19 days ago by gorillaBraun
Twitter
Involved in a road in ? A lawyer advises filing a report no matter what, and much more.…
police  accident  Taiwan  from twitter_favs
19 days ago by kerim
Another technological tragedy • bit-player
Brian Hayes, author of the book Infrastructure, on the explosions that blew up mains gas-connected buildings in Massachusetts in September, which was caused by a feedback loop that wasn't actually a loop - so it pushed up pressure because its readings said the pressure was too low, measured in the wrong pipes:
<p>when you open the valve to increase the inflow of gas, you expect the pressure to increase. (Or, in some circumstances, to decrease more slowly. In any event, the sign of the second derivative should be positive.) If that doesn’t happen, the control law would call for making an even stronger correction, opening the valve further and forcing still more gas into the pipeline. But you, in your wisdom, might pause to consider the possible causes of this anomaly. Perhaps pressure is falling because a backhoe just ruptured a gas main. Or, as in Lawrence last month, maybe the pressure isn’t actually falling at all; you’re looking at sensors plugged into the wrong pipes. Opening the valve further could make matters worse.

Could we build an automatic control system with this kind of situational awareness? Control theory offers many options beyond the simple feedback loop. We might add a supervisory loop that essentially controls the controller and sets the set point. And there is an extensive literature on predictive control, where the controller has a built-in mathematical model of the plant, and uses it to find the best trajectory from the current state to the desired state. But neither of these techniques is commonly used for the kind of last-ditch safety measures that might have saved those homes in the Merrimack Valley. More often, when events get too weird, the controller is designed to give up, bail out, and leave it to the humans. That’s what happened in Lawrence.</p>


This is a fascinating little discussion (with a couple of other accidents, including the notorious Air France 447 from Rio de Janeiro) which leaves much to think about. It also reminded me of control theory, which I haven't had to think of in decades. (Via Ben Thompson.)
energy  technology  failure  accident  systems 
26 days ago by charlesarthur

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