Flight dynamics is the study of the performance, stability, and control of vehicles flying through the air or in outer space. It is concerned with how forces acting on the vehicle influence its speed and attitude with respect to time.
In fixed-wing aircraft, the changing orientation of the vehicle with respect to the local air flow is represented by two critical parameters, angle of attack ("alpha") and angle of sideslip ("beta"). These angles describe the vector direction of airspeed, important because it is the principal source of modulations in the aerodynamic forces and moments applied to the aircraft.
Spacecraft flight dynamics involve three forces: propulsive (rocket engine), gravitational, and lift and drag (when traveling through the earths or any other celestial atmosphere). Because aerodynamic forces involved with spacecraft flight are very small, this leaves gravity as the dominant force.
Aircraft and spacecraft share a critical interest in their orientation with respect to the earth horizon and heading, and this is represented by another set of angles, "yaw," "pitch" and "roll" which angles match their colloquial meaning, but also have formal definition as an Euler sequence. These angles are the product of the rotational equations of motion, where orientation responds to torque, just as the velocity of a vehicle responds to forces. For all flight vehicles, these two sets of dynamics, rotational and translational, operate simultaneously and in a coupled fashion to evolve the vehicle's state (orientation and velocity) trajectory.
List auf Sylt (known as List until 31 December 2008) is the northernmost municipality in Germany, located on the North Sea island of Sylt close to Denmark in the district of Nordfriesland in the state of Schleswig-Holstein.
Etymology
List derived from the Middle Low German Liste (ledge, bar or edge).
History
List was originally a Danish settlement. It was first mentioned in 1292 (Lystum). The original village was destroyed by the great flood of 1364. The settlement was rebuilt further east from the previous location. In the mid-15th century, a church named St. Jürgen was mentioned. In a treaty of 1460, Schleswig and Holstein were linked to the Danish crown, but List remained part of the royal enclaves, small areas of the Kingdom of Denmark situated within the Duchy of Schleswig, but directly controlled by the Danish king.
From the 16th century, the people of List mostly made a living from Oyster farming, raising sheep and collecting and selling gull eggs. At the time, List was an important protective anchorage. In 1644, a Swedish-Dutch fleet of 26 ships commanded by Admiral Thijssen was attacked in the Lister Tief and defeated by Danish ships commanded by king Christian IV of Denmark. The anchorage north of today's town was named Königshafen to honour this event.
In computer science, a list or sequence is an abstract data type that represents an ordered sequence of values, where the same value may occur more than once. An instance of a list is a computer representation of the mathematical concept of a finite sequence; the (potentially) infinite analog of a list is a stream. Lists are a basic example of containers, as they contain other values. If the same value occurs multiple times, each occurrence is considered a distinct item.
The name list is also used for several concrete data structures that can be used to implement abstract lists, especially linked lists.
Many programming languages provide support for list data types, and have special syntax and semantics for lists and list operations. A list can often be constructed by writing the items in sequence, separated by commas, semicolons, or spaces, within a pair of delimiters such as parentheses '()', brackets '[]', braces '{}', or angle brackets '<>'. Some languages may allow list types to be indexed or sliced like array types, in which case the data type is more accurately described as an array. In object-oriented programming languages, lists are usually provided as instances of subclasses of a generic "list" class, and traversed via separate iterators. List data types are often implemented using array data structures or linked lists of some sort, but other data structures may be more appropriate for some applications. In some contexts, such as in Lisp programming, the term list may refer specifically to a linked list rather than an array.
Li (Chinese: 李; pinyin: Lǐ) is the second most common surname in China, behind only Wang. It is also one of the most common surnames in the world, shared by 93 million people in China, and more than 100 million worldwide. It is the fourth name listed in the Song dynasty classic text Hundred Family Surnames. According to the Sixth National Population Census of the People's Republic of China, Li takes back the number one surname in China with a population of 95,300,000 (7.94％).
The name is pronounced as "Lei" in Cantonese, but is often spelled as Lee in Hong Kong, Macau, Taiwan and many other overseas Chinese communities. In Macau, it is also spelled as Lei. In Indonesia it is commonly spelled as Lie.
The common Korean surname, Lee (also romanized as Yi, Ri, or Rhee), and the Vietnamese surname, Lý, are both derived from Li and are historically written with the same Chinese character, 李. The character also means "plum" or "plum tree".
According to tradition, the Li surname originated from the title Dali held by Gao Yao, a legendary minister of the Xia dynasty, and was originally written with the different character, 理. Laozi (Li Er), the founder of Taoism, was the first historical person known to have the surname and is regarded as the founding ancestor of the surname.
Lee is a given name derived from the English surname Lee (which is ultimately from a placename derived from Old English leah "clearing; meadow"). As the surname of Robert E. Lee (1807-1870), the name became popular in the American South after the Civil War, its popularity peaking in 1900 at rank 39 as a masculine name, and in 1955 at rank 182 as a feminine name. The name's popularity declined steadily in the second half of the 20th century, falling below rank 1000 by 1991 as a feminine name, and to 666 as of 2012 as a masculine name. In the later 20th century, it also gained some popularity in the United Kingdom, peaking among the 20 most popular boys' names during the 1970s to 1980s, but it had fallen out of the top 100 by 2001.
Lee is also a hypocoristic form of the given names Ashley, Beverly, Kimberley, and Leslie (all of which are also derived from English placenames containing -leah as a second element; with the possible exception of Leslie, which may be an anglicization of a Gaelic placename).
Tenacious D is the first studio album by American comedy rock band Tenacious D, released on September 25, 2001 by Epic Records. The album's polished production was a departure from the band's acoustic origins, due in part to the production of the Dust Brothers.
"Tribute" was the first single released from the album, followed by "Wonderboy". Both singles had music videos filmed for them, with the Liam Lynch–directed Tribute video achieving cult status. While Tenacious D did not achieve chart success after its release, it was certified platinum by the Recording Industry Association of America by the end of 2005. Despite only peaking at #38 in the UK, it had sold 426,000 copies countrywide by 2006.
Conception
For their first album, they enlisted the help of drummer Dave Grohl, keyboardist Page McConnell of Phish, guitarist Warren Fitzgerald, and bass player Steven Shane McDonald. The Dust Brothers produced the album. The majority of the songs on their debut album stem from early versions as seen on their HBO TV series, Tenacious D. The record itself does not list the song titles on the back cover as is the convention but instead on the back cover of the jacket; therefore one must open the CD (after presumably buying it) to read them. This is perhaps to allow songs with expletives or words otherwise deemed offensive to escape censorship or omission.
People is an American weekly magazine of celebrity and human-interest stories, published by Time Inc. With a readership of 46.6 million adults, People has the largest audience of any American magazine.People had $997 million in advertising revenue in 2011, the highest advertising revenue of any American magazine. In 2006, it had a circulation of 3.75 million and revenue expected to top $1.5 billion. It was named "Magazine of the Year" by Advertising Age in October 2005, for excellence in editorial, circulation and advertising.People ranked #6 on Advertising Age's annual "A-list" and #3 on Adweek's "Brand Blazers" list in October 2006.
The magazine runs a roughly 50/50 mix of celebrity and human-interest articles.People's editors claim to refrain from printing pure celebrity gossip, enough to lead celebrity publicists to propose exclusives to the magazine, and evidence of what one staffer calls a "publicist-friendly strategy".
People's website, People.com, focuses on celebrity news and human interest stories. In February 2015, the website broke a new record: 72 million unique visitors.