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As a smithing god, Hephaestus made all the weapons of the gods in Olympus. He served as the blacksmith of the gods, and was worshipped in the manufacturing and industrial centers of Greece, particularly Athens. The cult of Hephaestus was based in Lemnos.[2] Hephaestus' symbols are a smith's hammer, anvil, and a pair of tongs. Etymology[edit] Hephaestus, is probably associated with the Linear B (Mycenean Greek) inscription 𐀀𐀞𐀂𐀴𐀍, A-pa-i-ti-jo, found at Knossos; the inscription indirectly attests his worship at that time because it is believed that it reads the theophoric name Haphaistios or Haphaistion.[3][4][5] The name of the god in Greek (Hēphaistos), has a root which can be observed in names of places, of Pre-Greek origin.[6] Epithets[edit] Hephaestus is given many epithets. Mythology[edit] The craft of Hephaestus[edit] Parentage[edit] Fall from Olympus[edit] In another account, Hephaestus, attempting to rescue his mother from Zeus' advances, was flung down from the heavens by Zeus.

Norepinephrine Medically it is used in those with severe hypotension. It does this by increasing vascular tone (tension of vascular smooth muscle) through α-adrenergic receptor activation. Areas of the body that produce or are affected by norepinephrine are described as noradrenergic. The terms noradrenaline (from the Latin) and norepinephrine (from the Greek) are interchangeable, with noradrenaline being the common name in most parts of the world. However the U.S. National Library of Medicine[3] has promoted norepinephrine as the favored name. One of the most important functions of norepinephrine is its role as the neurotransmitter released from the sympathetic neurons to affect the heart. Medical uses[edit] Norepinephrine is used for hypotension. Hypotension[edit] Norepinephrine is also used as a vasopressor medication (for example, brand name Levophed) for patients with critical hypotension. Physiological effects[edit] Norepinephrine system[edit] Decision making[edit] Fasting[edit] Schizophrenia[edit]

Mood swing Bipolar disorder is characterized by extreme mood swings, usually between mania and depression Overview[edit] Speed and extent[edit] Mood swings are universal, varying from the microscopic to the wild oscillations of manic depression,[3] so that a continuum can be traced from normal struggles around self-esteem, through cyclothymia, up to a depressive disease.[4] However most people's mood swings remain in the mild to moderate range of emotional ups and downs.[5] The duration of mood swings also varies. In such cases, mood swings can extend over several days, even weeks: these episodes may consist of rapid alternation between feelings of depression and euphoria.[7] Causes[edit] Changes in a person's energy level, sex drive, sleep patterns, self-esteem, concentration, drug or alcohol use can be signs of an oncoming mood disorder.[8] Many different things might trigger mood swings, from unhealthy diet or life style to drug abuse or hormonal imbalance. Brain chemistry[edit] Conditions[edit]

Hot spring Definitions[edit] There is no universally accepted definition of a hot spring. For example, one can find the phrase hot spring defined as a thermal spring with water warmer than 36.7 °C (98 °F)[5][6]a natural spring of water greater than 21.1 °C (70 °F) (synonymous with thermal spring)[7][8][9][10]a natural discharge of groundwater with elevated temperatures[11]a type of thermal spring in which hot water is brought to the surface. The water temperature of a hot spring is usually 6.5 °C (12 °F) or more above mean air temperature.[12] Note that by this definition, "thermal spring" is not synonymous with the term "hot spring"a spring whose hot water is brought to the surface (synonymous with a thermal spring). Sources of heat[edit] In active volcanic zones such as Yellowstone National Park, water may be heated by coming into contact with magma (molten rock). Note that hot springs in volcanic areas are often at or near the boiling point. Flow rates[edit] High flow hot springs[edit]

Rift Block view of a rift formed of three segments, showing the location of the accommodation zones between them at changes in fault location or polarity (dip direction) Major rifts occur along the central axis of most mid-ocean ridges, where new oceanic crust and lithosphere is created along a divergent boundary between two tectonic plates. Geometry[edit] Most rifts consist of a series of separate segments that together form the linear zone characteristic of rifts. Accommodation zones take various forms, from a simple relay ramp at the overlap between two major faults of the same polarity, to zones of high structural complexity, particularly where the segments have opposite polarity. Rift development[edit] Rift initiation[edit] Mature rift stage[edit] As the rift evolves, some of the individual fault segments grow, eventually becoming linked together to form the larger bounding faults. Post-rift subsidence[edit] Multiphase rifting[edit] Magmatism[edit] Economic importance[edit] Oil and gas[edit]

Spring (hydrology) A spring is a component of the hydrosphere. Specifically, it is any natural situation where water flows to the surface of the earth from underground. Thus, a spring is a site where the aquifer surface meets the ground surface. A spring may be the result of karst topography where surface water has infiltrated the Earth's surface (recharge area), becoming part of the area groundwater. The forcing of the spring to the surface can be the result of a confined aquifer in which the recharge area of the spring water table rests at a higher elevation than that of the outlet. Non-artesian springs may simply flow from a higher elevation through the earth to a lower elevation and exit in the form of a spring, using the ground like a drainage pipe. Still other springs are the result of pressure from an underground source in the earth, in the form of volcanic activity. The action of the groundwater continually dissolves permeable bedrock such as limestone and dolomite, creating vast cave systems.[1]

Stoat The stoat (Mustela erminea), also known as the short-tailed weasel, is a species of Mustelidae native to Eurasia and North America, distinguished from the least weasel by its larger size and longer tail with a prominent black tip. The name ermine is often, but not always, used for the animal in its pure white winter coat, or the fur thereof.[2] Since the late 19th century, stoats have been introduced to New Zealand to control rabbits, but have had a devastating effect on native bird populations (see stoats in New Zealand). It is classed by the IUCN as Least Concern, due to its wide circumpolar distribution, and because it does not face any significant threat to its survival.[1] It was named one of the world's top 100 "worst invasive species" by the IUCN Species Survival Commission's Invasive Species Specialist Group.[3] Etymology[edit] Evolution[edit] Subspecies[edit] As of 2005[update],[11] 37 subspecies are recognised. Physical description[edit] Build[edit] Stoat skeleton Fur[edit] Young stoat