The pressure would be forced downward instead, which NASA hoped would break through the tough stretch of soil.
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Blast a hostile spacecraft from above, he says, and the wreckage will be forced downward to fiery doom in the atmosphere below.
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He concluded that the cause of the earthquake was a megathrust reaction in the Aleutian Trench, a result of the Alaskan continental crust overlapping the Pacific oceanic crust. This meant that the Pacific crust was being forced downward, or subducted, beneath the Alaskan crust. The concept of subduction would play a role in the development of the plate tectonics theory.
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The ride experience on AtmosFEAR features a very slow ascent, which is accented by custom designed LED lighting and an on-board sound system with thunderous sound effects. As the vehicle climbs, fog fills the air, and then without warning the vehicle is released and literally forced downward by a special launch system that generates faster-than-freefall speeds. It is the third-tallest ride at Morey's Piers.
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One of the first designs was simply using an open-bottomed, waxed cardboard milk carton container. The results were promising. When the taproot eventually reached the base, it would become exposed to air, dehydrate and die at the tip, stimulating roots to branch behind this point, much like pruning a hedge. However, all roots were forced downward so there was still plenty of room for improvement to gain side branching.
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In the early 1990s, Spec's opened two new superstores in Coconut Grove and South Beach. These two- story stores each featured more than 70,000 titles, a cafe, and weekend concerts. However, despite the hype surrounding the grand opening of these two new stores, Spec's Music was beginning to show signs of anemic financial performance. Sales and earnings were slipping, forced downward by the continuing stiff competition in Florida.
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Hotspot volcanoes are considered to have a fundamentally different origin from island arc volcanoes. The latter form over subduction zones, at converging plate boundaries. When one oceanic plate meets another, the denser plate is forced downward into a deep ocean trench. This plate, as it is subducted, releases water into the base of the over-riding plate, and this water mixes with the rock, thus changing its composition causing some rock to melt and rise.
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As the piston is forced downward during its power stroke it passes through windings in the cylinder to generate a burst of three-phase AC electricity. The piston generates electricity on both strokes, reducing piston dead losses. The generator operates on a two-stroke cycle, using hydraulically activated exhaust poppet valves, gasoline direct injection and electronically operated valves. The engine is easily modified to operate under various fuels including hydrogen, natural gas, ethanol, gasoline and diesel.
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Cut-away drawing of steam engine speed governor. The valve starts fully open at zero speed, but as the balls rotate and rise, the central valve stem is forced downward and closes the valve. The drive shaft whose speed is being sensed is top right Porter governor on a Corliss steam engine The devices shown are on steam engines. Power is supplied to the governor from the engine's output shaft by a belt or chain connected to the lower belt wheel.
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Another problem faced with PID controllers is that they are linear, and in particular symmetric. Thus, performance of PID controllers in non-linear systems (such as HVAC systems) is variable. For example, in temperature control, a common use case is active heating (via a heating element) but passive cooling (heating off, but no cooling), so overshoot can only be corrected slowly – it cannot be forced downward. In this case the PID should be tuned to be overdamped, to prevent or reduce overshoot, though this reduces performance (it increases settling time).
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A lift jack is fundamentally a lever that attaches to the scenery wagon platform with a hinge, with a caster mounted to the underside of the lever near the hinge. When no downward force is applied to the lever handle, the wagon rests securely on the stage; this effectively locks the wagon in place due to friction between the wagon platform and the stage. When the lever handle is forced downward, however, the caster serves as a to lift the wagon slightly above the stage, thus enabling the unit to be rolled. Lift jacks may be built into a wagon or onto a wagon's exterior, as circumstances dictate.
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Sea ice deformation results from the interaction between ice floes, as they are driven against each other. The end result may be of three types of features: 1) Rafted ice, when one piece is overriding another; 2) Pressure ridges, a line of broken ice forced downward (to make up the keel) and upward (to make the sail); and 3) Hummock, an hillock of broken ice that forms an uneven surface. A shear ridge is a pressure ridge that formed under shear – it tends to be more linear than a ridge induced only by compression. A new ridge is a recent feature – it is sharp-crested, with its side sloping at an angle exceeding 40 degrees.
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Basket presses are composed of a cylinder of wooden slats on top of a fixed plate, with a moveable plate that can be forced downward (usually by a central ratcheting threaded screw.) The press operator would load the grapes or pomace into the wooden cylinder, put the top plate in place and lower it until juice flowed from the wooden slats. As the juice flow decreased, the plate was ratcheted down again. This process continued until the press operator determined that the quality of the pressed juice or wine was below standard, or all liquids had been pressed. Since the early 1990s, modern mechanical basket presses have been revived through higher-end producers seeking to replicate the gentle pressing of the historical basket presses.
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It was revealed that two years before the collapse, the building's three rooftop air-conditioning units had been moved because of noise complaints from neighbors on the east side of the building. The building's managers admitted noticing cracks on the roof during the move, but instead of lifting them with a crane, the units were put on rollers and dragged across the roof, further destabilizing the surface by each unit's immense weight. Cracks formed in the roof slabs and the main support columns were forced downward; column 5E took a direct hit, forming cracks in the position connected to the fifth-floor restaurants. According to survivor accounts, each time that the air conditioners were switched on, the vibrations radiated through the cracks, reaching the supporting columns and widening the cracks, over the course of two years.
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