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Franklin D. Roosevelt, later the 32nd president of the United States from 1933 to 1945, began experiencing symptoms of a paralytic illness in 1921 when he was 39 years old. His main symptoms were fevers; symmetric, ascending paralysis; facial paralysis; bowel and bladder dysfunction; numbness and hyperesthesia; and a descending pattern of recovery.
More than 30,700 Ford Mustangs are being recalled in response to a problem that could cause unintentional turning of their steering wheels. The automaker said in a June 28 recall report filed to ...
Figure 1 Hard wheel rolling on and deforming a soft surface, resulting in the reaction force R from the surface having a component that opposes the motion. (W is some vertical load on the axle, F is some towing force applied to the axle, r is the wheel radius, and both friction with the ground and friction at the axle are assumed to be negligible and so are not shown.
Reinventing the square wheel is the practice of unnecessarily engineering artifacts that provide functionality already provided by existing standard artifacts (reinventing the wheel) and ending up with a worse result than the standard (a square wheel ). This is an anti-pattern which occurs when the engineer is unaware or contemptuous of the ...
A four-wheel drive, also called 4×4 ("four by four") or 4WD, is a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously. It may be full-time or on-demand, and is typically linked via a transfer case providing an additional output drive shaft and, in many instances, additional gear ranges .
Differential (mechanical device) A differential is a gear train with three drive shafts that has the property that the rotational speed of one shaft is the average of the speeds of the others. A common use of differentials is in motor vehicles, to allow the wheels at each end of a drive axle to rotate at different speeds while cornering.
The Flexity Outlook is the latest model of streetcar in the rolling stock of the Toronto streetcar system owned by the Toronto Transit Commission (TTC). Based on the Bombardier Flexity, they were first ordered in 2009 and were built by Bombardier Transportation in Thunder Bay and Kingston, Ontario, with specific modifications for Toronto, such as unidirectional operation and the ability to ...
Learn about delivery delays. Messages are often delivered right way though very rarely there may be a delay in transit. This is usually due to problems on the mail server, heavy internet traffic, or routing problems. Unfortunately, other than waiting, you won't be able to determine if the message is delayed or undeliverable.