Lighthouse of Alexandria

The lighthouse of Alexandria or the pharos of Alexandria, Greek was a tower built in the 3rd century BC between 285 and 247 BC on the island of pharos in Alexandria, Egypt to serve up as that port’s landmark and later, its lighthouse.

With a height variously predictable at between 115 -150 meters (377 - 492 ft) it was amongst the tallest man-made structures on Earth for many centuries, and was recognized as one of the Seven Wonders of the World by Antipater of Sidon. It may have been the third tallest building after the two Great Pyramids (of Khufu and Khafra) for its whole life. Some scholars estimate a much taller height more than 180 meters that would make the tower the tallest building up to the 14th century.

Seafood

It is one of the sea animals that are serving like food or fit for eating, this normally include seawater animal like fish and shellfish. By adding together in North America though not generally in UK, the word seafood is as well helpful to attach animal from fresh water and all apt for eating aquatic animals are together referred as the seafood.

The Edible seaweeds are almost not ever considered seafood, even though they come from seawater and are normally eaten around the world. The harvesting of seafood is well-known as fishing and the farming of seafood is known as aquaculture or simply fish farming. Seafood is the starting point of protein in many diets around the world.

Working capital

Working capital is also known as net working capital is a financial metric which represent the amount of day-by-day operating liquidity available to a business. Along with fixed assets such as plant and equipment, working capital is measured a part of operating capital. It is calculated as current assets less current liabilities. A company can be capable with assets and profitability, but short of liquidity, if these assets cannot readily be converted into cash.

When current assets are less than current liabilities, an entity has a working capital deficiency also called a working capital deficit.

Arbitrage

In economics and finance, arbitrage is the practice of taking benefit of a price differential between two or more markets: a mixture of similar deals is struck that take advantage of upon the imbalance, the profit being the difference between the market prices. When used by academics, an arbitrage is a transaction that involves no negative cash flow at any probabilistic or temporal state and a positive cash flow in at least one state; in simple terms, a risk-free profit. A person who engages in arbitrage is called an arbitrageur. The term is frequently applied to trading in financial instruments, such as bonds, stocks, derivatives, commodities and currencies.

If the market prices do not allow for profitable arbitrage, the prices are said to encompass an arbitrage equilibrium or arbitrage-free market. Arbitrage equilibrium is a precondition for a general economic equilibrium. The assumption that there is no arbitrage is used in quantitative finance to calculate a unique risk neutral price for derivatives.
Statistical arbitrage is an imbalance in predictable nominal values. A casino has a statistical arbitrage in almost every game of possibility that it offers - referred to as the house edge or house advantage or even the Vigorish.