Phoebe ( FEE-bee) is the most massive irregular satellite of Saturn with a mean diameter of 213 km (132 mi). It was discovered by William Henry Pickering on March 18, 1899 from photographic plates that had been taken starting on 16 August 1898 at the Boyden Station of the Carmen Alto Observatory near Arequipa, Peru, by DeLisle Stewart. It was the first satellite to be discovered photographically. Phoebe was the first target encountered upon the arrival of the Cassini spacecraft in the Saturn system in 2004, and is thus unusually well-studied for an irregular satellite of its size. Cassini's trajectory to Saturn and time of arrival were specifically chosen to permit this flyby. After the encounter and its insertion into orbit, Cassini did not go much beyond the orbit of Iapetus. Phoebe is roughly spherical and has a differentiated interior. It was spherical and hot early in its history and was battered out of roundness by repeated impacts. It is believed to be a captured centaur that originated in the Kuiper belt. Phoebe is the second largest retrograde satellite in...

Sensory neurons, also known as afferent neurons, are neurons in the nervous system, that convert a specific type of stimulus, via their receptors, into action potentials or graded potentials. This process is called sensory transduction. The cell bodies of the sensory neurons are located in the dorsal ganglia of the spinal cord.The sensory information travels on the afferent nerve fibers in a sensory nerve, to the brain via the spinal cord. The stimulus can come from exteroreceptors outside the body, for example those that detect light and sound, or from interoreceptors inside the body, for example those that are responsive to blood pressure or the sense of body position. Types and function Different types of sensory neurons have different sensory receptors that respond to different kinds of stimuli. There are at least six external and two internal sensory receptors: External receptors External receptors that respond to stimuli from outside the body are called exteroreceptors. Exteroreceptors include olfactory receptors (smell...

Greenhouse gas emissions from human activities strengthen the greenhouse effect, contributing to climate change. Most is carbon dioxide from burning fossil fuels: coal, oil, and natural gas. The largest emitters include coal in China and large oil and gas companies. Human-caused emissions have increased atmospheric carbon dioxide by about 50% over pre-industrial levels. The growing levels of emissions have varied, but have been consistent among all greenhouse gases (GHGs). Emissions in the 2010s averaged 56 billion tons a year, higher than any decade before. Each year, about 6.7 million people die from polluted air quality.Electricity generation and transport are major emitters; the largest single source, according to the United States Environmental Protection Agency, is transportation, accounting for 27% of all USA greenhouse gas emissions. Deforestation and other changes in land use also emit carbon dioxide and methane. The largest source of anthropogenic methane emissions is agriculture, closely followed by gas venting and fugitive emissions from the fossil-fuel industry. The largest agricultural methane source is livestock. Agricultural soils emit nitrous oxide...

Saint Alexius of Rome or Alexius of Edessa (Greek: Ἀλέξιος, Alexios), also Alexis, was a fourth-century Greek monk who lived in anonymity and is known for his dedication to Christ. There are two versions of his life that are known, a Syriac one and a Greek one. Syriac version According to Syriac tradition, St. Alexius was an Eastern saint whose veneration was later transplanted to Rome. The relocation of the veneration to Rome was facilitated by the belief that the saint was a native of Rome and had died there. This Roman connection stemmed from an earlier Syriac legend, which recounted that, during the episcopate of Bishop Rabbula (412–435), a "Man of God", who lived in Edessa, Mesopotamia as a beggar and shared the alms he received with other poor people, was found to be a native of Rome after his death. Greek version The Greek version of his legend made Alexius the only son of Euphemianus, a wealthy Christian Roman of the senatorial class. Alexius fled his arranged marriage to follow his holy vocation. Disguised as a...

Gulai is a class of spicy and rich stew commonly found in Indonesia, Malaysia and Singapore. The main ingredients of this dish are usually poultry, goat meat, beef, mutton, various kinds of offal, fish and seafood, as well as vegetables such as cassava leaves, unripe jackfruit and banana stem. Gulai is often described as Indonesian curry, although it is also considered a local dish in Malaysia and Singapore. Gulai is a common name to refer to curry dishes in the country, although Indonesian, Malaysian, and Singaporean cuisine also recognise kari (curry). Ingredients The gulai sauces commonly have a thick consistency with a yellowish colour because of the addition of ground turmeric. Gulai sauce ingredients consist of rich spices such as turmeric, coriander, black pepper, galangal, ginger, chilli pepper, shallot, garlic, fennel, lemongrass, cinnamon and caraway, ground into paste and cooked in coconut milk with the main ingredients. In Malaysia, kerisik is also added to thicken the gravy.Gulai recipes and ingredients are slightly different across the archipelago...

Percolation (from Latin percolare, "to filter" or "trickle through"), in physics, chemistry and materials science, refers to the movement and filtering of fluids through porous materials. It is described by Darcy's law. Broader applications have since been developed that cover connectivity of many systems modeled as lattices or graphs, analogous to connectivity of lattice components in the filtration problem that modulates capacity for percolation. Background During the last decades, percolation theory, the mathematical study of percolation, has brought new understanding and techniques to a broad range of topics in physics, materials science, complex networks, epidemiology, and other fields. For example, in geology, percolation refers to filtration of water through soil and permeable rocks. The water flows to recharge the groundwater in the water table and aquifers. In places where infiltration basins or septic drain fields are planned to dispose of substantial amounts of water, a percolation test is needed beforehand to determine whether the intended structure is likely to succeed or fail. In two dimensional square...

An intellectual is a person who engages in critical thinking, research, and reflection about the reality of society, and who proposes solutions for the normative problems of society. Coming from the world of culture, either as a creator or as a mediator, the intellectual participates in politics, either to defend a concrete proposition or to denounce an injustice, usually by either rejecting or producing or extending an ideology, and by defending a system of values. Etymological background "Man of letters" The term "man of letters" derives from the French term belletrist or homme de lettres but is not synonymous with "an academic". A "man of letters" was a literate man, able to read and write, as opposed to an illiterate man in a time when literacy was rare and thus highly valued in the upper strata of society. In the 17th and 18th centuries, the term Belletrist(s) came to be applied to the literati: the French participants in—sometimes referred...

The banjo is a stringed instrument with a thin membrane stretched over a frame or cavity to form a resonator. The membrane is typically circular, and usually made of plastic, or occasionally animal skin. Early forms of the instrument were fashioned by African Americans in the United States. The banjo is frequently associated with folk, bluegrass and country music, and has also been used in some rock, pop and hip-hop. Several rock bands, such as the Eagles, Led Zeppelin, and the Grateful Dead, have used the five-string banjo in some of their songs. Historically, the banjo occupied a central place in Black American traditional music and the folk culture of rural whites before entering the mainstream via the minstrel shows of the 19th century. Along with the fiddle, the banjo is a mainstay of American styles of music, such as bluegrass and old-time music. It is also very frequently used in Dixieland jazz, as well as in Caribbean genres like biguine, calypso and mento. History ...

Sébastien Le Prestre de Vauban, Seigneur de Vauban, later Marquis de Vauban (baptised 15 May 1633 – 30 March 1707), commonly referred to as Vauban (French: [vobɑ̃]), was a French military engineer who worked under Louis XIV. He is generally considered the greatest engineer of his time, and one of the most important in European military history. His principles for fortifications were widely used for nearly 100 years, while aspects of his offensive tactics remained in use until the mid-twentieth century. He viewed civilian infrastructure as closely connected to military effectiveness and worked on many of France's major ports, as well as projects like the Canal de la Bruche, which remain in use today. He founded the Corps royal des ingénieurs militaires, whose curriculum was based on his publications on engineering design, strategy and training. His economic tract, La Dîme royale, used...

Avant is the French word for 'fore' and 'ahead of'. Avant can refer to: People Avant, part of music production team Bloodshy & Avant Avant (singer), Myron Avant, an American singer Clarence Avant, a music executive Jason Avant, is a US American football playerPlaces Avant, Oklahoma, United States The Avant, a high-rise in Buffalo, New York, United StatesTechnology Computing Avant Browser Avant Window Navigator, computer software Avanti Corporation, whose name is often written “Avant!”Transport Avant (train), a medium distance high speed rail service in Spain Avant (airline), a former airline that operated flights within Chile in the late 1990s Audi Avant, a station wagon Audi RS2 Avant, a high performance estate car Citroën Traction Avant, a 1930s saloon carMusic Avant-pop...