Z-Wave

Z-Wave is a wireless communications specification for home automation. It is used by more than 325 manufacturers in the Z-Wave Alliance, principal members being the ADT Corporation, FAKRO, Ingersoll Rand, LG Uplus, Nortek Security & Control, and Sigma Designs.

Applications include lighting, HVAC, security systems, home cinema, automated window treatments, swimming pool and spas controls, and garage and home access controls.

As of 2015, Sigma Designs has certified more than Z-Wave 1,350 products. In October, 2013, Sigma Designs and the Z-Wave Alliance announced a new protocol and interoperability certification program called Z-Wave Plus, based upon new features and higher interoperability standards bundled together and required for the 500 series system on a chip (SoC), but encompassing some features that had been available since 2012 for the 300/400 series SoCs. In February, 2014 the first product was certified.

Overview

Z-Wave technology minimizes power consumption, so it is suitable for battery-operated devices. Z-Wave is designed to provide reliable, low-latency transmission of small data packets at data rates up to 100kbit/s, unlike Wi-Fi and other IEEE 802.11-based wireless LAN systems that are designed primarily for high data rates. Z-Wave operates in the sub-gigahertz frequency range, around 900 MHz. This band competes with some cordless telephones and other consumer electronics devices, but avoids interference with Wi-Fi, Bluetooth and other systems that operate on the crowded 2.4 GHz band. Z-Wave is designed to be easily embedded in consumer electronics products, including battery operated devices such as remote controls, smoke alarms and security sensors. Z-Wave was developed by a Danish startup called Zen-Sys that was acquired by Sigma Designs in 2008.

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.

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.

Wave (Antonio Carlos Jobim album)

Wave is the third album by Antônio Carlos Jobim, released in 1967 on A&M Records. It is known as Jobim's most successful album to date (# 5 US JAZZ ALBUMS 1967,# 114 US ALBUMS 1968), and it was listed by Rolling Stone Brazil as one of the 100 best Brazilian albums in history.

Track listing

Personnel

Strings