Thursday, December 31, 2009

Supercooling

Supercooling is the process of lowering the temperature of a liquid or a gas below its freezing point, without it becoming a solid.

Wednesday, December 30, 2009

spectrogram


A spectrogram is an image that shows how the spectral density of a signal varies with time. Also known as spectral waterfalls, sonograms, voiceprints, or voicegrams, spectrograms are used to identify phonetic sounds, to analyse the cries of animals, and in the fields of music, sonar/radar, speech processing, seismology, etc. The instrument that generates a spectrogram is called a spectrograph or sonograph.

Tuesday, December 29, 2009

spectrograph


A spectrograph is an optical instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials. The variable measured is most often the light's intensity but could also, for instance, be the polarization state.

Monday, December 28, 2009

Sunday, December 27, 2009

keylogging


Keystroke logging (often called keylogging) is the practice of noting (or logging) the keys struck on a keyboard, typically in a covert manner so that the person using the keyboard is unaware that their actions are being monitored. There are numerous keylogging methods, ranging from hardware- and software-based to electromagnetic and acoustic analysis.

Saturday, December 26, 2009

Astroturfing

Astroturfing is a word in American English describing formal political, advertising, or public relations campaigns seeking to create the impression of being spontaneous "grassroots" behavior, hence the reference to the artificial grass, AstroTurf.

The goal of such a campaign is to disguise the efforts of a political or commercial entity as an independent public reaction to some political entity—a politician, political group, product, service or event. Astroturfers attempt to orchestrate the actions of apparently diverse and geographically distributed individuals, by both overt ("outreach", "awareness", etc.) and covert (disinformation) means. Astroturfing may be undertaken by an individual pushing a personal agenda or highly organized professional groups with financial backing from large corporations, non-profits, or activist organizations. Very often the efforts are conducted by political consultants who also specialize in opposition research.

Friday, December 25, 2009

Mithraism


The Mithraic Mysteries or Mysteries of Mithras (also Mithraism) was a mystery religion which became popular among the military in the Roman Empire, from the 1st to 4th centuries AD. It is best attested in the cities of Rome and Ostia and in the Roman provinces of Mauretania, Britain, and in the provinces along the Rhine and Danube frontier.

Christianity was similar to Mithraism in many respects; for instance the Ecclesiastical calendar retains numerous remnants of pre-Christian festivals, notably Christmas, which blends elements including both the feast of the Saturnalia and the birthday of Mithra. Evaluation of the relationship of early Christianity with Mithraism has traditionally been based on the polemical testimonies of the 2nd century Church fathers, such as Justin's accusations that the Mithraists were diabolically imitating the Christians. This led to a picture of rivalry between the two religions, which Ernest Renan set forth in his 1882 The Origins of Christianity by saying "if the growth of Christianity had been arrested by some mortal malady, the world would have been Mithraic," However, Renan's conclusions have been criticised by contemporary scholarship. Edwin M. Yamauchi comments on Renan's work which, "published nearly 150 years ago, has no value as a source. He [Renan] knew very little about Mithraism...” Little was actually known about Mithras in 1882.

Thursday, December 24, 2009

Agar

Agar or agar agar is a gelatinous substance derived from seaweed. Historically and in a modern context, it is chiefly used as an ingredient in desserts throughout Japan, but in the past century has found extensive use as a solid substrate to contain culture medium for microbiological work. The gelling agent is an unbranched polysaccharide obtained from the cell walls of some species of red algae, primarily from the genera Gelidium and Gracilaria, or seaweed (Sphaerococcus euchema). Commercially it is derived primarily from Gelidium amansii.

Wednesday, December 23, 2009

gaffer


In colloquial British English gaffer means a foreman, and is used as a synonym for "boss". In the UK the term is commonly used to refer to sports coaches (football, rugby, etc).

The term is also sometimes used colloquially to refer to an old man, an elderly rustic, and can be used as a prefix to the name (as in Gaffer Gamgee in The Lord of the Rings). The word is probably a shortening of "godfather", with "ga" from association with "grandfather". The female equivalent was "Gammer", which came to colloquially refer to an old lady or gossip.

Tuesday, December 22, 2009

gaffer

A gaffer in the motion picture industry is the head of the electrical department, responsible for the execution (and sometimes the design) of the lighting plan for a production. The term was also used to describe men who adjusted lighting in English theatre and men who tended street lamps, after the "gaff" they used, a pole with a hook on its end.

Sometimes the gaffer is credited as Chief Lighting Technician (CLT).

Monday, December 21, 2009

anaphora

In rhetoric, an anaphora (Greek: ἀναφορά, "carrying back") is emphasizing words by repeating them at the beginnings of neighboring clauses. In contrast, an epistrophe (or epiphora) is repeating words at the clauses' ends. See also other figures of speech involving repetition.

Sunday, December 20, 2009

hyperforeignism

A hyperforeignism is a special type of hypercorrection resulting from an unsuccessful attempt to apply the reading rules of a foreign language to a loan word (for example, the application of the reading rules of one language to a word borrowed from another), or occasionally to a native English word believed to be a loan word. The result may be "absurd," reflecting "neither the reading rules of English nor those of the language from which the word in question comes."

Saturday, December 19, 2009

Claret

Claret is a name primarily used in British English for red wine from the Bordeaux region of France.

Friday, December 18, 2009

notarization

A notary public (or notary or public notary) is a public officer constituted by law to serve the public in non-contentious matters usually concerned with estates, deeds, powers-of-attorney, and foreign and international business. A notary's main functions are to administer oaths and affirmations, take affidavits and statutory declarations, witness and authenticate the execution of certain classes of documents, take acknowledgements of deeds and other conveyances, protest notes and bills of exchange, provide notice of foreign drafts, prepare marine protests in cases of damage, provide exemplifications and notarial copies, and perform certain other official acts depending on the jurisdiction. Any such act is known as a notarization. The term notary public only refers to common-law notaries and should not be confused with civil-law notaries.

Thursday, December 17, 2009

Beatification

Beatification (from Latin beatus, blessed, via Greek μακάριος, makarios) is a recognition accorded by the Catholic church of a dead person's accession to Heaven and capacity to intercede on behalf of individuals who pray in his or her name (intercession of saints). Beatification is the third of the four steps in the canonization process. A person who is beatified is given the title "Blessed".

Wednesday, December 16, 2009

Botellón

Botellón is a custom that takes place mainly in the Spanish nightlife, which involves the gathering of a large number of young people mostly between the ages of 16 and 24 outdoors to drink beverages previously acquired in shops (usually supermarkets), to listen to music and talk. This is often done because of the high prices in bars and being underage for bars and clubs.

The word botellón is an augmentative of botella (bottle) so the literal translation would be "big bottle".

Botellón is also used to refer to a drinking pack consisting of an alcoholic drink bottle, soft drink and ice. It is also known as botelleo, botellona, or botelloneo.

Tuesday, December 15, 2009

stillsuit


A stillsuit is a fictional body suit in Frank Herbert's Dune universe, first introduced in the 1965 novel Dune and appearing in every subsequent novel in the series. Stillsuits are worn by the native Fremen of the desert planet Arrakis to maintain their body moisture in the harsh environment. The Science of Dune (2008) analyzes Herbert's stillsuit and its feasibility in the real world as described.

Monday, December 14, 2009

coxswain


In a rowing crew, the coxswain (or simply the cox) is the member who sits in the stern (except in bowloaders) facing the bow, steers the boat, and coordinates the power and rhythm of the rowers.

fansite

fansite

  1. A website aimed at fans of something, such as a singer or football team.

Sunday, December 13, 2009

Sabermetrics

Sabermetrics is the analysis of baseball through objective evidence, especially baseball statistics. The term is derived from the acronym SABR, which stands for the Society for American Baseball Research. It was coined by Bill James, who was among its first proponents and has long been its most prominent and public advocate.

Saturday, December 12, 2009

Canonization

Canonization (or, canonisation) is the act by which a particular Christian church declares a deceased person to be a saint and is included in the canon, or list, of recognized saints. Originally, individuals were recognized as saints without any formal process.

Friday, December 11, 2009

Turbodiesel


Turbodiesel refers to any diesel engine with a turbocharger. Turbocharging is the norm rather than the exception in modern car and truck diesel engines. As with any turbocharged engine, turbodiesels can offer higher specific power outputs, lower emissions levels, improved efficiency and higher refinement levels than their naturally aspirated counterparts.

Thursday, December 10, 2009

Liberalism


Liberalism is a broad class of political philosophies that considers individual liberty and equality to be the most important political goals.

Wednesday, December 9, 2009

megabase

The following abbreviations are commonly used to describe the length of a DNA/RNA molecule:

  • bp = base pair(s)—one bp corresponds to circa 3.4 Å of length along the strand
  • kb (= kbp) = kilo base pairs = 1,000 bp
  • Mb = mega base pairs = 1,000,000 bp
  • Gb = giga base pairs = 1,000,000,000 bp

Tuesday, December 8, 2009

Freewheel


In mechanical or automotive engineering, a freewheel or overrunning clutch is a device in a transmission that disengages the driveshaft from the driven shaft when the driven shaft rotates faster than the driveshaft. An overdrive is sometimes mistakenly called a freewheel, but is otherwise unrelated.

The condition of a driven shaft spinning faster than its driveshaft exists in most bicycles when the rider holds his or her feet still, no longer pushing the pedals. Without a freewheel the rear wheel would drive the pedals around.

Monday, December 7, 2009

Dulse

Palmaria palmata (L.) Kuntze, also called dulse, dillisk, dilsk or creathnach, is a red alga (Rhodophyta) previously referred to as Rhodymenia palmata (Linnaeus) Greville. It grows on the northern coasts of the Atlantic and Pacific oceans. It is a well-known snack food, and in Iceland, where it is known as söl, it has been an important source of fibre throughout the centuries.

Sunday, December 6, 2009

transclusion

In computer science, transclusion is the inclusion of part of a document into another document by reference.

For example, an article about a country might include a chart or a paragraph describing that country's agricultural exports from a different article about agriculture. Rather than copying the included data and storing it in two places, a transclusion embodies modular design, by allowing it to be stored only once (and perhaps corrected and updated if the link type supported that) and viewed in different contexts. The reference also serves to link both articles.

The term was coined by hypertext pioneer Ted Nelson in 1982.

Saturday, December 5, 2009

Ferrocement

Ferrocement is a composite material which is used in building or sculpture with cement, sand, water and wire or mesh material—often called a thin shell in North America.

Ferrocement has great strength and economy. It is fireproof, earthquake safe and does not rust, rot or blow down in storms. It has a broad range of applications which include home building, creating sculptures, repair of existing artifacts and building boats and ships.

Friday, December 4, 2009

Gondwana


Gondwana (IPA: /ɡɒndˈwɑːnə/), originally Gondwanaland is the name given to a southern precursor-supercontinent (final ongoing joining occurred between ca. 570-510 Ma, joining East Gondwana to West Gondwana) and then as a remnant separated from Laurasia 180-200 million years ago during the breakup of the Pangaea supercontinent that existed about 500 to 200 Ma ago into two large segments. While the corresponding northern hemisphere continent Laurasia moved further north, the nearly equal in area Gondwana included most of the landmasses in today's southern hemisphere, including Antarctica, South America, Africa, Madagascar, Australia-New Guinea, and New Zealand, as well as Arabia and the Indian subcontinent, which have now moved into the Northern Hemisphere. The name is derived from the Gondwana region of central northern India (from Sanskrit gondavana "forest of Gond").

The adjective "Gondwanan" is in common use in biogeography when referring to patterns of distribution of living organisms, typically when the organisms are restricted to two or more of the now-discontinuous regions that were once part of Gondwana; e.g., the Proteaceae, a family of plants that is known only from Chile, South Africa, and Australia are considered to have a "Gondwanan distribution". This pattern is often considered to indicate an archaic, or relict lineage.

Thursday, December 3, 2009

Campanology


Campanology (from late Latin campana, "bell"; and Greek -λογία, -logia) is the study of bells. It encompasses the physical realities of bells — how they are cast, tuned and sounded — as well as the various methods devised to perform bell-ringing.

It is common to collect together a set of tuned bells and treat the whole as one musical instrument. Such collections — such as a Flemish carillon, a Russian zvon, or a British "ring of bells" used for change ringing — have their own practices and challenges; and campanology is likewise the study of perfecting such instruments, composing music for them, and performing it.

In this sense, however, the word "campanology" is most often used in reference to relatively large bells, often hung in a tower. It is not usually applied to assemblages of smaller bells, such as a glockenspiel, a collection of tubular bells, or an Indonesian gamelan.

Wednesday, December 2, 2009

Combinatorics

Combinatorics is a branch of pure mathematics concerning the study of discrete (and usually finite) objects. Aspects of combinatorics include "counting" the objects satisfying certain criteria (enumerative combinatorics), deciding when the criteria can be met, and constructing and analyzing objects meeting the criteria (as in combinatorial designs and matroid theory), finding "largest", "smallest", or "optimal" objects (extremal combinatorics and combinatorial optimization), and finding algebraic structures these objects may have (algebraic combinatorics).

Tuesday, December 1, 2009

colocation

In computing, colocation refers to installing or running data or applications in a single process, store, computer or data center. Virtualization is an example of colocation where a host server provides a virtual hardware or software platform for running one or more instances of software on a (potentially different) platform. Web Hosting is an example of colocation where a host server provides a portal to content along with potentially thousands of other portals on the same equipment.