Raid

Raid or RAID may refer to:

Attack

Entertainment

Other uses

Raido

Not to be confused with Radio.

*Raidō "ride, journey" is the reconstructed Proto-Germanic name of the r- rune of the Elder Futhark ᚱ. The name is attested for the same rune in all three rune poems, Old Norwegian Ræið Icelandic Reið, Anglo-Saxon Rad, as well as for the corresponding letter of the Gothic alphabet 𐍂 r, called raida. The shape of the rune may be directly derived from Latin R.

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Raid (boating)

Raid – A sail and oar adventure This is a leisure pursuit combining sailing and rowing. It involves a fleet of small boats capable of being rowed and sailed, exploring a coastline or inland waterway over several days, often with some competitive element.
In describing raiding, the organiser of the 2010 & 2011 English Raids states; "The idea of making coastal voyages in company, in open boats powered by sail and oar, was given currency by the French group Albacore, led by Charles-Henri le Moing during the 1990s, starting in Portugal and Scotland... The word raid has slipped into English and lost its usual associations of pillage and destruction – to those who participate at least."

Raiding has become increasingly popular amongst small-boat sailors, and this has fostered the development of raid-worthy boats. An example of the type is American whaleboat "Molly" crewed by The Henley Whalers.

Raiding is not only an enjoyable outdoor activity, it has been noted to promote family participation.

Block (periodic table)

A block of the periodic table of elements is a set of adjacent groups. The term appears to have been first used by Charles Janet. The respective highest-energy electrons in each element in a block belong to the same atomic orbital type. Each block is named after its characteristic orbital; thus, the blocks are:

The block names (s, p, d, f and g) are derived from the spectroscopic notation for the associated atomic orbitals: sharp, principal, diffuse and fundamental, and then g which follows f in the alphabet.

The following is the order for filling the "subshell" orbitals, according to the Aufbau principle, which also gives the linear order of the "blocks" (as atomic number increases) in the periodic table:

For discussion of the nature of why the energies of the blocks naturally appear in this order in complex atoms, see atomic orbital and electron configuration.

The "periodic" nature of the filling of orbitals, as well as emergence of the s, p, d and f "blocks" is more obvious, if this order of filling is given in matrix form, with increasing principal quantum numbers starting the new rows ("periods") in the matrix. Then, each subshell (composed of the first two quantum numbers) is repeated as many times as required for each pair of electrons it may contain. The result is a compressed periodic table, with each entry representing two successive elements:

Block (rural Australia)

Block is an Australian term for a small agricultural landholding. Block settlement has been used by Governments to encourage decentralization and during financial depressions to give families of unemployed workers an opportunity (frequently illusory) to become primary producers. It may also refer to a lifestyle choice or "hobby farm" for those with an independent source of income.

In parts of Australia, parcels of land of around 6 to 20 acres (2 to 8 ha) were allocated by Government to working-class men at nominal rent during the depression of the 1890s with the object of giving them work and, potentially, a source of income. Some eventually prospered, but those on marginal land were doomed to failure. Proponents of the "block system" included George Witherage Cotton. Holders of such allotments were referred to as "blockers" or "blockies".

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Block (data storage)

In computing (specifically data transmission and data storage), a block, sometimes called a physical record, is a sequence of bytes or bits, usually containing some whole number of records, having a maximum length, a block size. Data thus structured are said to be blocked. The process of putting data into blocks is called blocking, while deblocking is the process of extracting data from blocks. Blocked data is normally stored in a data buffer and read or written a whole block at a time. Blocking reduces the overhead and speeds up the handling of the data-stream. For some devices such as magnetic tape and CKD disk devices blocking reduces the amount of external storage required for the data. Blocking is almost universally employed when storing data to 9-track magnetic tape, to NAND flash memory, and to rotating media such as floppy disks, hard disks, and optical discs.

Most file systems are based on a block device, which is a level of abstraction for the hardware responsible for storing and retrieving specified blocks of data, though the block size in file systems may be a multiple of the physical block size. This leads to space inefficiency due to internal fragmentation, since file lengths are often not integer multiples of block size, and thus the last block of a file may remain partially empty. This will create slack space, which averages half a block per file. Some newer file systems attempt to solve this through techniques called block suballocation and tail merging.