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A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li + ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a longer cycle life, and a longer calendar life.
Renaissance Technologies LLC, also known as RenTech [4] or RenTec, [5] is an American hedge fund based in East Setauket, New York, [6] on Long Island, which specializes in systematic trading using quantitative models derived from mathematical and statistical analysis. Their signature Medallion fund is famed for the best record in investing history.
Mauritania, [a] officially the Islamic Republic of Mauritania ( Arabic: الجمهورية الإسلامية الموريتانية, al-Jumhūrīyah al-Islāmīyah al-Mūrītānīyah ), is a sovereign country in Northwest Africa. It is bordered by the Atlantic Ocean to the west, Western Sahara to the north and northwest, Algeria to the ...
In finance, a coupon is the interest payment received by a bondholder from the date of issuance until the date of maturity of a bond . Coupons are normally described in terms of the "coupon rate", which is calculated by adding the sum of coupons paid per year and dividing it by the bond's face value. For example, if a bond has a face value of ...
Coupon collector's problem. In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: If each box of a brand of cereals contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be ...
Ramzan Kadyrov. Ramzan Akhmatovich Kadyrov [b] (born 5 October 1976) is a Russian politician and current Head of the Chechen Republic. He was formerly affiliated to the Chechen independence movement, through his father who was the separatist-appointed mufti of Chechnya. He is a colonel general in the Russian military.