User Index Page for "Computer Science"

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... In computer science, ACID (atomicity, consistency, isolation, durability) is a set of properties that guarantee database transactions are processed reliably. In the context of databases, a single logical operation on the data is called a transaction. For example, a transfer of funds from one bank account to another, even though that might involve multiple changes (such as debiting one account and crediting another), is a single transaction. ... [full article] (130 views)
This bookmark is tagged as: ACID | database management | computer science | database transactions
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Call stack

... In computer science, a call stack is a stack data structure that stores information about the active subroutines of a computer program. This kind of stack is also known as an execution stack, control stack, function stack, or run-time stack, and is often shortened to just \"the stack\". Although maintenance of the call stack is important for the proper functioning of most software, the details are normally transparent in high-level programming languages. ... [full article] (104 views)
This bookmark is tagged as: computer science | programming basics | call stack | execution stack
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Thread (computer science)

... In computer science, a thread of execution is the smallest unit of processing that can be scheduled by an operating system. It generally results from a fork of a computer program into two or more concurrently running tasks. The implementation of threads and processes differs from one operating system to another, but in most cases, a thread is contained inside a process. Multiple threads can exist within the same process and share resources such as memory, while different processes do not share these resources. In particular, the threads of a process share the latter\'s instructions (its code) and its context (the values that its variables reference at any given moment). To give ... [full article] (111 views)
This bookmark is tagged as: computer science | multithreading
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... An n-gram is a subsequence of n items from a given sequence. The items in question can be phonemes, syllables, letters, words or base pairs according to the application. ... [full article] (175 views)
This bookmark is tagged as: algorithm | computer science | n-gram
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Dynamic programming

... In mathematics and computer science, dynamic programming is a method of solving complex problems by breaking them down into simpler steps. It is applicable to problems that exhibit the properties of overlapping subproblems which are only slightly smaller[1] and optimal substructure (described below). When applicable, the method takes much less time than naive methods. ... [full article] (131 views)
This bookmark is tagged as: dynamic programming | mathematics | computer science | solving complex problems
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Text Information Extraction

... Great lecture. Unfortunately the slides available for download are not the same as the ones used by Mr. Nigam. Otherwise I find the lecture very informing and well presented. Thank You. ... [full article] (131 views)
This bookmark is tagged as: text information extraction | lecture video | kamal nigam | computer science
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Power of two

... In mathematics, a power of two is any of the integer powers of the number two;[1] in other words, two multiplied by itself a certain number of times.[2] By definition, the number one is a power (the zeroth power) of two. ... [full article] (121 views)
This bookmark is tagged as: mathematics | power of two | computer science
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Stack (data structure)

... In computer science, a stack is a last in, first out (LIFO) abstract data type and data structure. A stack can have any abstract data type as an element, but is characterized by only two fundamental operations: push and pop. The push operation adds to the top of the list, hiding any items already on the stack, or initializing the stack if it is empty. The pop operation removes an item from the top of the list, and returns this value to the caller. A pop either reveals previously concealed items, or results in an empty list. ... [full article] (86 views)
This bookmark is tagged as: stack | computer science | data structures
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Garbage collection (computer science)

... In computer science, garbage collection (GC) is a form of automatic memory management. It is a special case of resource management, in which the limited resource being managed is memory. The garbage collector, or just collector, attempts to reclaim garbage, or memory occupied by objects that are no longer in use by the program. Garbage collection was invented by John McCarthy around 1959 to solve problems in Lisp.[1][2] ... [full article] (133 views)
This bookmark is tagged as: garbage collection | computer science | memory management
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... In computer science, metaheuristic designates a a computational method that optimizes a problem by iteratively trying to improve a candidate solution with regard to a given measure of quality. Metaheuristics make few or no assumptions about the problem being optimized and can search very large spaces of candidate solutions. However, metaheuristics do not guarantee an optimal solution is ever found. Many metaheuristics implement some form of stochastic optimization. ... [full article] (122 views)
This bookmark is tagged as: computer science | metaheuristic | heuristic
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