Solstice

A solstice is an astronomical event that occurs twice each year (in June and December) as the Sun reaches its highest or lowest excursion relative to the celestial equator on the celestial sphere. Both the solstices and the equinoxes are directly connected with the seasons of the year.

The term solstice can also be used in a broader sense, as the day when this occurs. The day of the solstice is either the longest day of the year (summer solstice) or the shortest day of the year (winter solstice) for any place outside of the tropics. Alternative terms, with no ambiguity as to which hemisphere is the context, are June solstice and December solstice, referring to the months of year in which they take place.

At latitudes in the temperate zone, the summer solstice marks the day when the sun appears highest in the sky. However, in the tropics, the sun appears directly overhead (called the subsolar point) some days (or even months) before the solstice and again after the solstice, which means the subsolar point occurs twice each year.

Solstice (UK doom metal band)

Solstice is an epic doom metal band from Dewsbury, England, founded by Rich Walker after the breaking up of his previous hardcore punk / grindcore bands Sore Throat and Warfear. Together with Candlemass and Solitude Aeturnus, Solstice is responsible for expanding upon epic doom metal.

Rich Walker also used to run The Miskatonic Foundation, a record label dedicated to doom metal and traditional heavy metal. It has now since dissolved due to lack of time.

History

The band released their debut album Lamentations on England's Candlelight Records in 1994 and caught the attention of an underground scene that was at that point swept up with the still new second wave of black metal. Successive UK and European tours, with Count Raven and Anathema respectively, firmly cemented the band as something of a cult act across the continent.

1996 saw the release of the Halcyon EP on Black Tears, comfortably conveying the strength and progression of that line-up, while further embracing their English Heavy Metal roots but with an aesthetic that shows the band were not afraid to court a more sinister undercurrent. Shortly after, however, Solstice once again suffered line-up problems that essentially resulted in the band becoming largely dormant. In 1998, the band signed with Misanthropy Records, which helped with the release of New Dark Age', but the band was painfully laid to rest in 2002.

Solstice (UK progressive rock band)

Solstice are a British neo-progressive, folk rock band formed in 1980. They are led by guitarist Andy Glass, who is the sole founding member still in the band.

History

The band formed in 1980, and performed BBC sessions and received national music press coverage before splitting in 1985 (with one guest appearance in 1986). Their only album release in this period was 1984's Silent Dance.

Interest generated by a CD reissue of Silent Dance led to a reunion in the nineties with two studio releases, New Life and Circles, and a live album, The Cropredy Set.

Guitarist Andy Glass once more put the band on hold in order to focus on band 3sticks. A DVD release of the Cropredy performance preceded another reunion in 2007, with the entire back catalogue being remastered and issued in expanded "Definitive Edition" form. The band then toured the UK and, for the first time, mainland Europe.

Band members Andy Glass, Peter Helmsley, and Jenny Newman also work together in the band "3 Sticks".

Charm

Charm or charms, or The Charm, originally from Latin carmen ("song"), may refer to:

Common meanings

People

Geography

Business

Science and computing

Greeks (finance)

In mathematical finance, the Greeks are the quantities representing the sensitivity of the price of derivatives such as options to a change in underlying parameters on which the value of an instrument or portfolio of financial instruments is dependent. The name is used because the most common of these sensitivities are denoted by Greek letters (as are some other finance measures). Collectively these have also been called the risk sensitivities,risk measures or hedge parameters.

Use of the Greeks

The Greeks are vital tools in risk management. Each Greek measures the sensitivity of the value of a portfolio to a small change in a given underlying parameter, so that component risks may be treated in isolation, and the portfolio rebalanced accordingly to achieve a desired exposure; see for example delta hedging.

The Greeks in the Black–Scholes model are relatively easy to calculate, a desirable property of financial models, and are very useful for derivatives traders, especially those who seek to hedge their portfolios from adverse changes in market conditions. For this reason, those Greeks which are particularly useful for hedging—such as delta, theta, and vega—are well-defined for measuring changes in Price, Time and Volatility. Although rho is a primary input into the Black–Scholes model, the overall impact on the value of an option corresponding to changes in the risk-free interest rate is generally insignificant and therefore higher-order derivatives involving the risk-free interest rate are not common.

Charm quark

The charm quark or c quark (from its symbol, c) is the third most massive of all quarks, a type of elementary particle. Charm quarks are found in hadrons, which are subatomic particles made of quarks. Example of hadrons containing charm quarks include the J/ψ meson (J/ψ), D mesons (D), charmed Sigma baryons (Σ
c), and other charmed particles.

It, along with the strange quark is part of the second generation of matter, and has an electric charge of +²⁄₃ e and a bare mass of 7000129000000000000♠1.29+0.05
−0.11 GeV/c². Like all quarks, the charm quark is an elementary fermion with spin-¹⁄₂, and experiences all four fundamental interactions: gravitation, electromagnetism, weak interactions, and strong interactions. The antiparticle of the charm quark is the charm antiquark (sometimes called anticharm quark or simply anticharm), which differs from it only in that some of its properties have equal magnitude but opposite sign.

The existence of a fourth quark had been speculated by a number of authors around 1964 (for instance by James Bjorken and Sheldon Glashow), but its prediction is usually credited to Sheldon Glashow, John Iliopoulos and Luciano Maiani in 1970 (see GIM mechanism). The first charmed particle (a particle containing a charm quark) to be discovered was the J/ψ meson. It was discovered by a team at the Stanford Linear Accelerator Center (SLAC), led by Burton Richter, and one at the Brookhaven National Laboratory (BNL), led by Samuel Ting.

Long

Long may refer to:

In measurements

In geography

People and characters

Other uses

See also