Sine wave

The sine wave or sinusoid is a mathematical curve that describes a smooth repetitive oscillation. It is named after the function sine, of which it is the graph. It occurs often in pure and applied mathematics, as well as physics, engineering, signal processing and many other fields. Its most basic form as a function of time (t) is:

where:

= the phase, specifies (in radians) where in its cycle the oscillation is at t = 0.

• When is non-zero, the entire waveform appears to be shifted in time by the amount /ω seconds. A negative value represents a delay, and a positive value represents an advance.

When is non-zero, the entire waveform appears to be shifted in time by the amount /ω seconds. A negative value represents a delay, and a positive value represents an advance.

Wave

In physics, a wave is an oscillation accompanied by a transfer of energy that travels through space or mass. Frequency refers to the addition of time. Wave motion transfers energy from one point to another, which displace particles of the transmission medium—that is, with little or no associated mass transport. Waves consist, instead, of oscillations or vibrations (of a physical quantity), around almost fixed locations.

There are two main types of waves. Mechanical waves propagate through a medium, and the substance of this medium is deformed. The deformation reverses itself owing to restoring forces resulting from its deformation. For example, sound waves propagate via air molecules colliding with their neighbors. When air molecules collide, they also bounce away from each other (a restoring force). This keeps the molecules from continuing to travel in the direction of the wave.

The second main type of wave, electromagnetic waves, do not require a medium. Instead, they consist of periodic oscillations of electrical and magnetic fields originally generated by charged particles, and can therefore travel through a vacuum. These types of waves vary in wavelength, and include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

Wave (gesture)

A wave is a movement of the hand that people use to greet each other, say goodbye or merely acknowledge another's presence. People wave by raising their hand and moving it from side to side. Another common wave is to raise one's hand and repeatedly move the fingers downward toward the palm. A variant known as the wigglywave consists of holding the hand near shoulder level and wiggling the fingers randomly. This can be used to appear cute or flirtatious to the target of the wave. The gesture can be used to attract attention at a distance. Most commonly, though, the gesture means quite simply "hello" or "goodbye .

The royal wave, also known as a regal wave, pageant wave, parade wave, or Miss America wave, is a similar but distinct kind of hand waving gesture in which a person executes something alternatively described as either a 'plastic grin' with 'fingers cupped' and 'forearm swaying side-to-side' or a "vertical hand with a slight twist from the wrist". The gesture is often performed, to various degrees, by different members of the British royal family, signaling anything from regality, class and control to elegance, restraint and character.

Park West, Dublin

Park West (Irish: Páirc an Iarthair) is a large business campus within greater Ballyfermot, notably Cherry Orchard, Dublin, Ireland, with some residential development.

There are over 300 companies with 10,000 employees.

Location and content

Located just inside the M50 orbital motorway in west Dublin, the development comprises several million square metres of office and retail space, along with an Aspect hotel, a private hospital, and three apartment complexes.

Park West is in the administration of Dublin City Council, and Dublin postal districts Dublin 10 and Dublin 12, chiefly the latter.

Art

Park West is home to Europe's tallest wind and water mobile sculpture, Wave by Angela Conner. It is a 39.3 metre (129 feet) tall sculpture made of polystyrene covered with layers of carbon resin. It is fixed into a 7.6 metre (25 foot) pit filed with 9.5 tonnes of lead.

Transport

The campus is accessible by road (primarily the (New) Nangor Road, as well as Killeen Road and Cloverhill), bus (routes 79A and 151) and rail at the Park West and Cherry Orchard railway station. At a moderate distance to the south is the Kylemore stop on the Luas red line.