Pad

Pad or PAD may refer to:

Transportation

Sports gear

Computing and electronics

Padáň

Padáň (Hungarian: Padány, Hungarian pronunciation:[ˈpɒdaːɲ]) is a village and municipality in the Dunajská Streda District in the Trnava Region of south-west Slovakia.

History

The village was first recorded in 1254 as Padan, an old Pecheneg settlement. On the territory of the village, there used be Petény village as well, which was mentioned in 1298 as the appurtenance of Pressburg Castle. Until the end of World War I, it was part of Hungary and fell within the Dunaszerdahely district of Pozsony County. After the Austro-Hungarian army disintegrated in November 1918, Czechoslovakian troops occupied the area. After the Treaty of Trianon of 1920, the village became officially part of Czechoslovakia. In November 1938, the First Vienna Award granted the area to Hungary and it was held by Hungary until 1945. After Soviet occupation in 1945, Czechoslovakian administration returned and the village became officially part of Czechoslovakia in 1947.

Demography

In 1910, the village had 637, for the most part, Hungarian inhabitants. At the 2001 Census the recorded population of the village was 863 while an end-2008 estimate by the Statistical Office had the villages's population as 873. As of 2001, 94,44 per cent of its population was Hungarian while 5,21 per cent was Slovakian. 50% of the inhabitants profess Protestantism, while adherents of Roman Catholicism number 41,95% of the total population.

Π pad

The Π pad (pi pad) is a specific type of attenuator circuit in electronics whereby the topology of the circuit is formed in the shape of the Greek letter "Π".

Attenuators are used in electronics to reduce the level of a signal. They are also referred to as pads due to their effect of padding down a signal by analogy with acoustics. Attenuators have a flat frequency response attenuating all frequencies equally in the band they are intended to operate. The attenuator has the opposite task of an amplifier. The topology of an attenuator circuit will usually follow one of the simple filter sections. However, there is no need for more complex circuitry, as there is with filters, due to the simplicity of the frequency response required.

Circuits are required to be balanced or unbalanced depending on the geometry of the transmission lines they are to be used with. For radio frequency applications, the format is often unbalanced, such as coaxial. For audio and telecommunications, balanced circuits are usually required, such as with the twisted pair format. The Π pad is intrinsically an unbalanced circuit. However, it can be converted to a balanced circuit by placing half the series resistance in the return path. Such a circuit is called a box section because the circuit is formed in the shape of a box.

Synthesizer

A sound synthesizer (usually abbreviated as "synthesizer" or "synth", also spelled "synthesiser") is an electronic musical instrument that generates electric signals that are converted to sound through instrument amplifiers and loudspeakers or headphones. Synthesizers may either imitate the still existing sounds (instruments, vocal, natural sound, etc.), or generate new electronic timbres not existing before. They are often played with a musical keyboard, but they can be controlled via a variety of other input devices, including music sequencers, instrument controllers, fingerboards, guitar synthesizers, wind controllers, and electronic drums. Synthesizers without built-in controllers are often called sound modules, and are controlled via MIDI or CV/Gate using a controller device.

Synthesizers use various methods to generate signal. Among the most popular waveform synthesis techniques are subtractive synthesis, additive synthesis, wavetable synthesis, frequency modulation synthesis, phase distortion synthesis, physical modeling synthesis and sample-based synthesis. Other less common synthesis types (see #Types of synthesis) include subharmonic synthesis, a form of additive synthesis via subharmonics (used by mixture trautonium), and granular synthesis, sample-based synthesis based on grains of sound, generally resulting in soundscapes or clouds.

Cape Canaveral Air Force Station Launch Complex 34

Cape Canaveral (known as Cape Kennedy from 1963 to 1973) Air Force Station Launch Complex 34 (LC-34) is a launch site on Cape Canaveral, Florida. LC-34 and its companion LC-37 to the north were used by NASA from 1961 through 1968 to launch Saturn I and IB rockets as part of the Apollo program. It was the site of the Apollo 1 fire, which claimed the lives of astronauts Gus Grissom, Ed White, and Roger Chaffee on January 27, 1967.

History

Construction

Work began on LC-34 in 1960, and it was formally dedicated on June 5, 1961. The complex consisted of a launch platform, umbilical tower, mobile service tower, fueling facilities, and a blockhouse. Two steel flame deflectors were mounted on rails to allow placement beneath the launch platform. The service tower was likewise mounted on rails, and it was towed to a position 185 meters west of the pad before launch. At 95 meters high, it was the tallest structure at LC-34.

The blockhouse, located 320 meters from the pad, was modeled after the domed reinforced concrete structure at LC-20. During a launch, it could accommodate 130 people as well as test and instrumentation equipment. Periscopes afforded views outside the windowless facility.