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The sword-billed hummingbird ( Ensifera ensifera) is a neotropical species of hummingbird from the Andean regions of South America. Among the largest species of hummingbird, it is characterized by its unusually long beak, being the only bird to have a beak longer than the rest of its body, excluding the tail.
The plus sign ( +) and the minus sign ( −) are mathematical symbols used to denote positive and negative functions, respectively. In addition, + represents the operation of addition, which results in a sum, while − represents subtraction, resulting in a difference. [1] Their use has been extended to many other meanings, more or less analogous.
Blackbeard's Ghost. Blackbeard's Ghost is a 1968 American fantasy comedy film directed by Robert Stevenson and starring Peter Ustinov, Dean Jones, and Suzanne Pleshette. It was produced by Walt Disney Productions and Bill Walsh. It is based upon the 1965 novel of the same name by Ben Stahl and was shot at the Walt Disney Studios .
Blackboard bold is a style of writing bold symbols on a blackboard by doubling certain strokes, commonly used in mathematical lectures, and the derived style of typeface used in printed mathematical texts. The style is most commonly used to represent the number sets ( natural numbers ), ( integers ), ( rational numbers ), ( real numbers ), and ...
WebCT (Course Tools) or Blackboard Learning System, [1] now owned by Blackboard, is an online proprietary virtual learning environment system that is licensed to colleges and other institutions and used in many campuses for e-learning. To their WebCT courses, instructors can add such tools as discussion boards, mail systems, and live chat ...
Uses. Reusable writing surface on which text or drawings are made. A blackboard or a chalkboard is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.
Active. Romeo (until 2021 PlanetRomeo) is a social network for gay, bisexual, queer and transgender people. The site was started as a hobby and was called GayRomeo in October 2002 by Planetromeo GmbH in Berlin, Germany. [3] [4] Initially only available in German the site and later its mobile app have evolved into an international platform.
Pointwise mutual information. In statistics, probability theory and information theory, pointwise mutual information ( PMI ), [1] or point mutual information, is a measure of association. It compares the probability of two events occurring together to what this probability would be if the events were independent. [2]