AC

AC, A.C. or Ac may refer to:

Computing

Entertainment

Air conditioning

Air conditioning (often referred to as A/C or AC) is the process of altering the properties of air (primarily temperature and humidity) to more comfortable conditions, typically with the aim of distributing the conditioned air to an occupied space such as a building or a vehicle to improve thermal comfort and indoor air quality. In common use, an air conditioner is a device that lowers the air temperature. The cooling is typically achieved through a refrigeration cycle, but sometimes evaporation or free cooling is used. Air conditioning systems can also be made based on desiccants.

In the most general sense, air conditioning can refer to any form of technology that modifies the condition of air (heating, cooling, (de-)humidification, cleaning, ventilation, or air movement). However, in construction, such a complete system of heating, ventilation, and air conditioning is referred to as heating, ventilation, and air conditioning (HVAC -as opposed to AC).

History

The basic concept behind air conditioning is said to have been applied in ancient Egypt, where reeds were hung in windows and were moistened with trickling water. The evaporation of water cooled the air blowing through the window. This process also made the air more humid, which can be beneficial in a dry desert climate. In Ancient Rome, water from aqueducts was circulated through the walls of certain houses to cool them. Other techniques in medieval Persia involved the use of cisterns and wind towers to cool buildings during the hot season.

Toyota A engine

The A Series engines are a family of inline-four internal combustion engines with displacement from 1.3 L to 1.8 L produced by Toyota Motor Corporation. The series has cast iron engine blocks and aluminum cylinder heads.

The development of the series began in the late 1970s, when Toyota wanted to develop a completely new engine for the Toyota Tercel, successor of Toyota's K engine. The goal was to achieve good fuel efficiency and performance as well as low emissions with a modern design. The A-series includes the first mass-production DOHC, four-valve-per-cylinder engine, the 4A-GE, and a later version of the same motor was one of the first production five-valve-per-cylinder engines.

Toyota joint venture partner Tianjin FAW Xiali still produces the 1.3 L 8A and recently resumed production of the 5A.

1A

The 1.5 L 1A was produced between 1978 and 1980. All variants were belt-driven 8-valve counter-flow SOHC engine with a single, twin-barrel downdraft carburetor.

1A-C

Applications:

Yell

Yell may refer to:

People with the surname

Yell! (band)

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Yell! was a British pop duo who had a hit single in 1990 with a cover of "Instant Replay".

Overview

Yell! consisted of singers Paul Varney and Daniel James. In 1989 they were put together by manager Jeff Chegwin and were signed by Simon Cowell to Fanfare Records. Their first single, a cover version of Dan Hartman's disco track, "Instant Replay", was produced by Nigel Wright and mixed by Pete Hammond from PWL . In January 1990 it entered the UK singles chart and peaked at No.10, giving the duo instant attention in the pop press and a large teen fanbase. Soon after this however, scandal hit the act as newspaper reports emerged that member Daniel James' real name was Colin Heywood who was in fact 32 years old, rather than the 23 he claimed to be. James at first denied the age claim, but member Paul Varney later admitted this to be true and said it was a mistake to try and conceal the fact.

Their follow-up releases both missed the UK Top 75. "One Thing Leads to Another" released in June 1990 reached number 81, and a cover of "Let's Go Round Again" (produced by Nigel Wright) released in September 1990 reached number 78. The duo recorded an album, Let's Go!, but this only saw a release in Japan in 1991. Soon after this the duo disbanded. Varney went onto release some solo singles which proved unsuccessful, but became a successful songwriter, composing the UK entry for the 1999 Eurovision Song Contest, "Say It Again", which was a UK top 10 hit. James embarked on an acting career.

Scouting

Scouting or the Scout Movement is a movement that aims to support young people in their physical, mental and spiritual development, that they may play constructive roles in society, with a strong focus on the outdoors and survival skills. During the first half of the 20th century, the movement grew to encompass three major age groups for boys (Cub Scout, Boy Scout, Rover Scout) and, in 1910, a new organization, Girl Guides, was created for girls (Brownie Guide, Girl Guide and Girl Scout, Ranger Guide). It is one of several worldwide youth organizations.

In 1906 and 1907 Robert Baden-Powell, a lieutenant general in the British Army, wrote a book for boys about reconnaissance and scouting. Baden-Powell wrote Scouting for Boys (London, 1908), based on his earlier books about military scouting, with influence and support of Frederick Russell Burnham (Chief of Scouts in British Africa), Ernest Thompson Seton of the Woodcraft Indians, William Alexander Smith of the Boys' Brigade, and his publisher Pearson. In the summer of 1907 Baden-Powell held a camp on Brownsea Island in England to test ideas for his book. This camp and the publication of Scouting for Boys are generally regarded as the start of the Scout movement.