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Queue
__NOTOC__ Queue () may refer to: * Queue area, or queue, a line or area where people wait for goods or services Arts, entertainment, and media *''ACM Queue'', a computer magazine * The Queue (Sorokin novel), ''The Queue'' (Sorokin novel), a 1983 novel by Russian author Vladimir Sorokin * The Queue (Abdel Aziz novel), ''The Queue'' (Abdel Aziz novel), a 2013 novel by Egyptian author Basma Abdel Aziz Mathematics and technology *Queue (abstract data type), a type of data structure in computer science **Circular queue **Double-ended queue, also known as a deque **Priority queue *FIFO (computing and electronics) *Load (computing) or queue, system load of a computer's operating system *Message queue *Queueing theory, the study of wait lines Other uses * Queue (hairstyle), a Manchurian pigtail * The Queue, a queue to view the coffin of Queen Elizabeth II during her lying in state See also *Cue (other) *FIFO (other) *First-come, first-served *Q (other) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queueing Theory
Queueing theory is the mathematical study of waiting lines, or queues. A queueing model is constructed so that queue lengths and waiting time can be predicted. Queueing theory is generally considered a branch of operations research because the results are often used when making business decisions about the resources needed to provide a service. Queueing theory has its origins in research by Agner Krarup Erlang when he created models to describe the system of Copenhagen Telephone Exchange company, a Danish company. The ideas have since seen applications including telecommunication, traffic engineering, computing and, particularly in industrial engineering, in the design of factories, shops, offices and hospitals, as well as in project management. Spelling The spelling "queueing" over "queuing" is typically encountered in the academic research field. In fact, one of the flagship journals of the field is ''Queueing Systems''. Single queueing nodes A queue, or queueing node ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
First-come, First-served
Queueing theory is the mathematical study of waiting lines, or queues. A queueing model is constructed so that queue lengths and waiting time can be predicted. Queueing theory is generally considered a branch of operations research because the results are often used when making business decisions about the resources needed to provide a service. Queueing theory has its origins in research by Agner Krarup Erlang when he created models to describe the system of Copenhagen Telephone Exchange company, a Danish company. The ideas have since seen applications including telecommunication, traffic engineering, computing and, particularly in industrial engineering, in the design of factories, shops, offices and hospitals, as well as in project management. Spelling The spelling "queueing" over "queuing" is typically encountered in the academic research field. In fact, one of the flagship journals of the field is ''Queueing Systems''. Single queueing nodes A queue, or queueing node ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Queue
The Queue was a nickname for the queue of mourners who waited to file past the coffin of Queen Elizabeth II while she lay in state at Westminster Hall in London, England, from 14 to 19 September 2022. Two separate queues for mourners operated. The main queue had a length of up to and a maximum waiting time of more than 24 hours; this was the queue that attracted the most media attention. There was also an accessible queue for people with disabilities or long-term health conditions. The queues opened at 17:00 BST on 14 September. The accessible queue was closed to new entrants at 16:33 on 17 September, and the main queue closed at 22:41 on 18 September. The lying in state ended shortly after 06:30 on 19 September, in advance of Elizabeth II's state funeral later that day. About 250,000 people were estimated to have waited in the queue. The media and academics commented on the significance of the Queue as a symbol of the relationship of British people to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queue (abstract Data Type)
In computer science, a queue is a collection of entities that are maintained in a sequence and can be modified by the addition of entities at one end of the sequence and the removal of entities from the other end of the sequence. By convention, the end of the sequence at which elements are added is called the back, tail, or rear of the queue, and the end at which elements are removed is called the head or front of the queue, analogously to the words used when people line up to wait for goods or services. The operation of adding an element to the rear of the queue is known as ''enqueue'', and the operation of removing an element from the front is known as ''dequeue''. Other operations may also be allowed, often including a ''peek'' or ''front'' operation that returns the value of the next element to be dequeued without dequeuing it. The operations of a queue make it a first-in-first-out (FIFO) data structure. In a FIFO data structure, the first element added to the queue will b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Queue (Sorokin Novel)
''The Queue'' is a 1983 novel by Russian writer Vladimir Sorokin, first published in English by Readers International in 1988. It has been described as "a bizarrely funny saga of a quintessential Russian institution, the interminably long line." The Library Journal describes Sorokin’s work as being an “avant-garde experiment" with a "flair of nonsense." ''The Queue'' does not follow a traditional narrative style. Instead, it is told in dialogue form, so as to make the reader feel like they are part of the line. As described by the Library Journal, the text lacks description, setting, or stage direction. Instead it is filled with nothing but voices: snatches of conversation, rumors, jokes, howls of humor, roll calls, and sexy moans. Plot summary A man is waiting in a seemingly endless line, but for what? ''The Queue'' begins with a cacophony of voices and the protagonist, Vadim, encountering a woman named Lena. As the day progresses the queue-goers realize that they have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Queue (Abdel Aziz Novel)
''The Queue'' ( ar, الطابور, ''Al-Tabuur'') is a 2013 satire novel by Basma Abdel Aziz. It was first published in English in 2016. The novel explores totalitarianism and bureaucracy through the lens of a fictional Middle Eastern state and the people under its control. Plot In an unnamed Middle Eastern city, a building known as the Gate controls the populace by making decrees and requiring inordinate amounts of paperwork which must be directly processed by the Gate itself. Dr. Tarek examines a patient named Yehya, who was shot by government forces in a riot known as the Disgraceful Events. The Gate begins a propaganda campaign to rewrite the history of the Events, denying that anyone was shot at all. The Gate decrees that is illegal to remove a bullet without a permit. It also confiscates all X-Rays within the city, removing all evidence of government-sponsored violence. After the Events, the Gate remains closed. Thousands of people stand outside in the titular queue, awai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queue Area
Queue areas are places in which people queue (first-come, first-served) for goods or services. Such a group of people is known as a ''queue'' (British usage) or ''line'' (American usage), and the people are said to be waiting or standing ''in a queue'' or ''in line'', respectively. (In the New York City area, the phrase ''on line'' is often used in place of ''in line''.) Occasionally, both the British and American terms are combined to form the term "queue line". Examples include checking out groceries or other goods that have been collected in a self service shop, in a shop without self-service, at an ATM, at a ticket desk, a city bus, or in a taxi stand. Queueing is a phenomenon in a number of fields, and has been extensively analysed in the study of queueing theory. In economics, queueing is seen as one way to ration scarce goods and services. Types Physical History The first written description of people standing in line is found in an 1837 book, '' The French Revol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Priority Queue
In computer science, a priority queue is an abstract data-type similar to a regular queue or stack data structure in which each element additionally has a ''priority'' associated with it. In a priority queue, an element with high priority is served before an element with low priority. In some implementations, if two elements have the same priority, they are served according to the order in which they were enqueued; in other implementations ordering of elements with the same priority remains undefined. While coders often implement priority queues with heaps, they are conceptually distinct from heaps. A priority queue is a concept like a list or a map; just as a list can be implemented with a linked list or with an array, a priority queue can be implemented with a heap or with a variety of other methods such as an unordered array. Operations A priority queue must at least support the following operations: * ''is_empty'': check whether the queue has no elements. * ''insert_wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Message Queue
In computer science, message queues and mailboxes are software-engineering components typically used for inter-process communication (IPC), or for inter- thread communication within the same process. They use a queue for messaging – the passing of control or of content. Group communication systems provide similar kinds of functionality. The message queue paradigm is a sibling of the publisher/subscriber pattern, and is typically one part of a larger message-oriented middleware system. Most messaging systems support both the publisher/subscriber and message queue models in their API, e.g. Java Message Service (JMS). Remit and ownership Message queues implement an asynchronous communication pattern between two or more processes/threads whereby the sending and receiving party do not need to interact with the message queue at the same time. Messages placed onto the queue are stored until the recipient retrieves them. Message queues have implicit or explicit limits on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FIFO (computing And Electronics)
Representation of a FIFO queue In computing and in systems theory, FIFO is an acronym for first in, first out (the first in is the first out), a method for organizing the manipulation of a data structure (often, specifically a data buffer) where the oldest (first) entry, or "head" of the queue, is processed first. Such processing is analogous to servicing people in a queue area on a first-come, first-served (FCFS) basis, i.e. in the same sequence in which they arrive at the queue's tail. FCFS is also the jargon term for the FIFO operating system scheduling algorithm, which gives every process central processing unit (CPU) time in the order in which it is demanded. FIFO's opposite is LIFO, last-in-first-out, where the youngest entry or "top of the stack" is processed first. A priority queue is neither FIFO or LIFO but may adopt similar behaviour temporarily or by default. Queueing theory encompasses these methods for processing data structures, as well as interactions between s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queue (hairstyle)
A queue or cue is a hairstyle that was worn by the Jurchen and Manchu peoples of Manchuria, and was later required to be worn by male subjects of Qing China. Hair on top of the scalp is grown long and is often braided, while the front portion of the head is shaved. The distinctive hairstyle led to its wearers being targeted during anti-Chinese riots in Australia and the United States. The requirement that Han Chinese men and others under Manchu rule give up their traditional hairstyles and wear the queue was met with resistance, although opinions about the queue did change over time. Han women were never required to wear their hair in the traditional women's Manchu style, liangbatou, although that too was a symbol of Manchu identity. In the 18th century, both soldiers and sailors of western nations wore their hair pulled back into a queue, but the fashion was abandoned at the start of the next century. Predecessors and origin The Xianbei and Wuhuan were said to shave their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circular Queue
In computer science, a circular buffer, circular queue, cyclic buffer or ring buffer is a data structure that uses a single, fixed-size buffer as if it were connected end-to-end. This structure lends itself easily to buffering data streams. There were early circular buffer implementations in hardware. Overview A circular buffer first starts out empty and has a set length. In the diagram below is a 7-element buffer: : Assume that 1 is written in the center of a circular buffer (the exact starting location is not important in a circular buffer): : Then assume that two more elements are added to the circular buffer — 2 & 3 — which get put after 1: : If two elements are removed, the two oldest values inside of the circular buffer would be removed. Circular buffers use FIFO (''first in, first out'') logic. In the example, 1 & 2 were the first to enter the circular buffer, they are the first to be removed, leaving 3 inside of the buffer. : If the buffer has 7 elem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
