have+an+unsteady+motion
11Charles Redheffer — A diagram of Redheffer s first machine Charles Redheffer was an American inventor who claimed to have invented a perpetual motion machine. First appearing in Philadelphia, Redheffer exhibited his machine to the public, charging high prices for… …
12Hyperkinesia — This article is about hyperkinesia, the pathologically increased muscular movement. For hyperkinesis, hyperactivity often seen in children, see Hyperkinesis. Hyperkinesia Basal ganglia and its normal pathways. This circuitry is often disrupted in …
13Micro air vehicle — Naval Air Weapons Station China Lake, California A Micro Air Vehicle (MAV) flies over a simulated combat area during an operational test flight. The MAV is in the operational test phase with military Explosive Ordnance Disposal (EOD) teams to… …
14Vortex induced vibration — Vortex induced vibrations (VIV) are motions induced on bodies facing an external flow by periodical irregularities on this flow. The classical example is the VIV of an underwater cylinder. You can see how this happens by putting a cylinder into… …
15photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
16Depth of field — The area within the depth of field appears sharp, while the areas in front of and beyond the depth of field appear blurry …
17Jumping position — The jumping position is a position used by equestrians when jumping over an obstacle. It usually involves what is known as the forward seat or 2 point because the rider has 2 points in contact with the horse; the legs and hands. It was first… …
18Rowing (sport) — All eight types of racing boats, six of which are part of the Olympic Games Rowing is a sport in which athletes race against each other on rivers, on lakes or on the ocean, depending upon the type of race and the discipline. The boats are… …
19Cephalopod — Cephalopods Temporal range: Devonian – Recent[1] (Stem groups from Cambrian)[2] …
20Airy wave theory — In fluid dynamics, Airy wave theory (often referred to as linear wave theory) gives a linearised description of the propagation of gravity waves on the surface of a homogeneous fluid layer. The theory assumes that the fluid layer has a uniform… …
