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Topic: Algorithmic efficiency

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	Efficiency - Wikipedia, the free encyclopedia
		Efficiency is the capability of acting or producing effectively with a minimum amount or quantity of waste, expense, or unnecessary effort.
		A slightly broader model of efficiency that nevertheless remains consistent with the "percentage" definition in many cases is to say that efficiency corresponds to the ratio r=P/C of the amount P of some valuable resource produced, per amount C of valuable resources consumed.
		For example, in the analysis of the energy efficiency of heat engines in thermodynamics, the product P may be the amount of useful work output, while the consumable C is the amount of high-temperature heat input.
	en.wikipedia.org /wiki/Efficiency (417 words)

	Algorithmic efficiency - Wikipedia, the free encyclopedia
		In computer science, efficiency is used to describe several desirable properties of an algorithm or other construct, besides clean design, functionality, etc. Efficiency is generally contained in two properties: speed, (the time it takes for an operation to complete), and space, (the memory or non-volatile storage used up by the construct).
		Optimization is the process of making code as efficient as possible, sometimes focusing on space at the cost of speed, or vice versa.
		The most common method uses time complexity to determine the Big-O of an algorithm: often, it is possible to make an algorithm faster at the expense of space.
	www.wikipedia.org /wiki/Algorithmic_efficiency (351 words)

	Sorting Algorithms (Site not responding. Last check: 2007-10-09)
		The common sorting algorithms can be divided into two classes by the complexity of their algorithms.
		Algorithmic complexity is a complex subject (imagine that!) that would take too much time to explain here, but suffice it to say that there's a direct correlation between the complexity of an algorithm and its relative efficiency.
		Algorithmic complexity is generally written in a form known as Big-O notation, where the O represents the complexity of the algorithm and a value n represents the size of the set the algorithm is run against.
	linux.wku.edu /~lamonml/algor/sort/sort.html (696 words)

	Algorithmic efficiency (Site not responding. Last check: 2007-10-09)
		In computer programming, efficiency isused to describe several desirable properties of an algorithm or other construct,besides clean design, functionality, etc. Efficiency is generally contained in two properties: speed, (the time it takes for anoperation to complete), and space, (the memory or non-volatile storage used up by the construct).
		Optimization is the process of making code as efficient as possible, sometimes focusing on space at thecost of speed, or vice versa.
		The first part is the space taken up by the compiledexecutable on disk (or equivalent, depending on the hardware and language) by the algorithm.
	www.therfcc.org /algorithmic-efficiency-126005.html (322 words)

	Encyclopedia: Efficiency
		Economic efficiency is a general term for the value assigned to a situation by some measure designed to capture the amount of waste or friction or other undesirable and undesirable economic features present.
		Fuel efficiency relates the efficiency of conversion to kinetic energy from energy contained in a carrier fuel, specifically in a transportation vehicle, such as an automobile.
		Material efficiency is a description or metric which expresses the degree to which a construction project or physical process is carried out in a manner which consumes, incorporates, or wastes more or less of a given material compared to some standard.
	www.nationmaster.com /encyclopedia/Efficiency (1376 words)

	Algorithmic efficiency (Site not responding. Last check: 2007-10-09)
		In computer programming efficiency is used to describe several desirable of an algorithm or other construct besides clean design etc. Efficiency is generally contained in two speed (the time it takes for an to complete) and space (the memory or storage used up by the construct).
		The most common method uses time complexity to determine the Big-O of an algorithm: often it is to make an algorithm faster at the of space.
		On the parallel efficiency of the Frederickson-McBryan multigrid (SuDoc NAS 1.26:181999)
	www.freeglossary.com /Algorithmic_efficiency (447 words)

	IB CS (Site not responding. Last check: 2007-10-09)
		From there, work out the algorithmic efficiency from the outside in -- figure out the efficiency of the outer loop or recursive portion of the code, then find the efficiency of the inner code; the total efficiency is the efficiency of each layer of code multiplied together.
		Some efficiencies are more important than others in computer science, and on the next page, you'll see a list of the most important and useful orders of efficiency, along with examples of algorithms having that efficiency.
		An example of an algorithm with this efficiency is merge sort, which breaks up an array into two halves, sorts those two halves by recursively calling itself on them, and then merging the result back into a single array.
	www.eca.com.ve /ibcs2/bigO.htm (2752 words)

	Cprogramming.com Article: Algorithmic Efficiency and Big-O notation
		Many sorting algorithms are well-known; the problem is not to find a way to sort words, but to find a way to efficiently sort words.
		Clearly, having a more efficient algorithm to sort words would be handy; and, of course, there are many that can sort 100 words within the life of the universe.
		Also, if you are determining the order of an algorithm and the order turns out to be the sum of several terms, you will typically express the efficiency as only the term with the highest order.
	www.cprogramming.com /tutorial/computersciencetheory/algorithmicefficiency1.html (617 words)

	Algorithmic efficiency -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-09)
		(The act of rendering optimal) Optimization is the process of making code as efficient as possible, sometimes focusing on space at the cost of speed, or vice versa.
		The most common method uses (Click link for more info and facts about time complexity) time complexity to determine the (Click link for more info and facts about Big-O) Big-O of an algorithm: often, it is possible to make an algorithm faster at the expense of space.
		There are exceptions to this rule (such as (Click link for more info and facts about embedded system) embedded systems, where space is tight, and processing power minimal) but these are rarer than one might expect.
	www.absoluteastronomy.com /encyclopedia/a/al/algorithmic_efficiency.htm (292 words)

	Ela Zur
		Questionnaire 2 contained questions about students' intuitions and misconceptions with regard to the concept of an algorithm's efficiency, after studying and internalizing the subject in class, that is after completing the study of "Fundamentals of Computer Science 1" (Chapter 11 in the textbook).
		The aim of Questionnaire 3 was to examine students' understanding of the concept of an algorithm's efficiency after completing the study of "Fundamentals of Computer Science 2".
		When the algorithmic problems are complex, a small percentage of the students (about 40%) are able to discern whether an array is needed.
	www.tau.ac.il /~masof/eduweb/toar3/archive/etakzir2003-10.htm (1223 words)

	Talk:Algorithmic efficiency - Wikipedia, the free encyclopedia
		The word "efficient" is a common one used in many different contexts.
		What about 'efficient' and 'effective' The german wikipedia makes a distinction between both.
		If there is such a distinction in english (I do not know, I am no native speaker) then you should probably mention it.
	www.wikipedia.org /wiki/Talk:Efficiency (74 words)

	CS50 - Algorithm Review Notes
		Algorithms should be well organized to accomplish specific, identifiable tasks on their way to the final goal.
		An algorithm which chooses an element in the data set and and then performs some function of this element for each element in the rest of the data set, (such as comparing each to all the other elements in the set), and then recurses (or loops) is O(n^2).
		There are many algorithms that depend on having sorted data (or having the ability sort data), and a substantial percentage of all the computing resources in the world are spent keeping records sorted.
	www.eecs.harvard.edu /~ellard/CS50-96/Notes/alg.html (4348 words)

	Algorithmic efficiency in TutorGig Discussion Groups (Site not responding. Last check: 2007-10-09)
		Thus, the efficiency of the individual cells is greater than the efficiency of the panel, and the cells in the panel Anthony used in his example probably have efficiency around 16%.
		I just thought there might be some known efficiency depending on whether the filter (criteria) is applied at the top level or at the bottom level; i.e.
		Since you are a beginner, you should not bother with string concatenation efficiency unless you have a tight loop.
	groups.tutorgig.com /s/Algorithmic+efficiency (759 words)

	The parallel Verlet neighbor-list algorithm
		One possible resolution of this low efficiency is to use the classical Verlet neighbor-list method[5], but in the context of a parallel algorithm.
		We have implemented a standard Verlet neighbor-list algorithm in the context of our previously described parallel MD algorithm[4], with the aim of achieving the fastest possible execution time at the expense of using large amounts of RAM memory for storing neighbor-list related data in each parallel node.
		Another aspect that influences algorithmic choices is the fact that our EMT interactions, which are more appropriate for simulating metallic systems, require more than 10 times the number of floating-point operations per pair-interaction, than for the case of Lennard-Jones interactions which are usually employed in MD studies.
	dcwww.camp.dtu.dk /~ohnielse/md/node2.html (1159 words)

	[No title]
		EFFICIENCY 1 There are several qualities which a good algorithm should exhibit (see lecture 2) including: Efficiency: The algorithm should be implementable in a way which is not wasteful of resources (mainly CPU cycles and memory) Why is efficiency so important?
		More efficient version: circumpherence = 2 * Pi * wheel_radius repeat wait for a revolution of the drive-shaft distance = distance + circumpherence until car scrapped We only need to calculate the circumpherence once as it is a constant value.
		Simplicity/understandability is often more important than execution speed so an efficient but complex algorithm is often a less appropriate solution than a less efficient but simpler solution.
	www.comp.lancs.ac.uk /computing/users/sawyer/csc111/L7.text (854 words)

	Overhead - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-09)
		For example, an algorithm which caches frequent results for quick retrieval has the overhead of mantaining the memory to store the cached results.
		In terms of Algorithmic efficiency, overhead is often the terms which are asymptotically irrelevant.
		Algorithm B is said to have overhead which constitutes the 4 extra operations for each input length and 7 additional operations (overhead may be used to describe all or any part of the additional operations).
	www.voyager.in /Overhead (644 words)

	Education
		The efficiency and importance of vectorization in numerical computation.
		The tradeoff that sometimes occurs between algorithmic efficiency and good numerical properties of algorithms.
		Persistence!---the fact that a numerically unsound algorithm may have a numerically sound version.
	epubs.siam.org /sam-bin/dbq/article/97099 (330 words)

	Efficiency Apartments (Site not responding. Last check: 2007-10-09)
		Efficiency is the capability of acting or producing effectively with a minimum of waste, expense, or unnecessaryeffort.
		In several of these cases efficiency can be expressed as a result as percentage of what ideally could be expected, hence with100% as ideal case.
		This does not always apply, not even in all cases where efficiency can be assigned a numerical value, e.g.not for specific impulse.
	www.elusiveeye.com /side4474-efficiency-apartments.html (488 words)

	Faculty of Business Administration (Site not responding. Last check: 2007-10-09)
		In a subsequent work (Verma, Verter and Gendreau, 2004), a tactical planning model that captured the intricacies of railroad operations was developed, a Memetic Algorithm based solution methodology was developed, and a number of computational experiments were conducted to throw light on algorithmic efficiency and gain numerical insights.
		This work seeks to establish a generic framework for intermodal transportation of both regular and hazardous freight, and is motivated by the notion to capture the efficiencies of trucks and economies of railroads.
		Intuitively one can conceive that combining the efficiency of trucks with the economies of rail should yield better results for freight transportation than when the two modes are used without any co-ordination.
	www.busi.mun.ca /mverma/workingpapers.html (489 words)

	Exclusive or - Wikipedia, the free encyclopedia
		It tells whether there are an odd number of one bits (A ⊕ B ⊕ C ⊕ D ⊕ E is true iff an odd number of the variables are true).
		On some computer architectures, it is more efficient to store a zero in a register by xor-ing the register with itself (bits xor-ed with themselves are always zero) instead of loading and storing the value zero.
		Because 'xor' is a more complex logical function than 'or' and 'and', its neural network requires an additional processing layer.
	en.wikipedia.org /wiki/XOR (786 words)

	Trends In Algorithms For Nonuniform Applications On Hierarchical Distributed Architectures - Keyes (ResearchIndex) (Site not responding. Last check: 2007-10-09)
		This act of delegation is appropriate at the small scales, since programmer management of pipelines, multiple functional units, and multilevel caches is presently beyond reward, and the depth and complexity of such performance-motivated...
		5.1 Improvement in algorithmic efficiency A region of strong nonlinearity embedded in a region of nearly linear behavior is characteristic...
		] Improvement in algorithmic efficiency A region of strong nonlinearity embedded in a region of nearly linear behavior is...
	citeseer.ist.psu.edu /306193.html (542 words)

	Cprogramming.com - Algorithms - Insertion Sort and Selection Sort
		Selection sort is the most conceptually simple of all the sorting algorithms.
		It works by selecting the smallest (or largest, if you want to sort from big to small) element of the array and placing it at the head of the array.
		The multiplication works out so that the efficiency is n*(n/2), though the order is still O(n^2).
	www.cprogramming.com /tutorial/computersciencetheory/sorting2.html (327 words)

	Lecture 10
		We want a way of comparing algorithmic efficiency which gives an upper bound function depending on the ``size'' of the input.
		Since some computers are faster than others, we need a way of measuring the relative efficiency of algorithms that is independent of the computer that it is run on.
		For some function f, we say a searching algorithm runs in O(f(n)) time if the worst case behaviour doesn't take more than C*f(n) seconds to perform for large enough n, where C is a constant that is independent of n.
	www.cs.toronto.edu /~craig/1998,csc108Summer/lectures/lect10.html (833 words)

	Work-Preserving Speed-Up of Parallel Matrix Computations
		In this paper we take the complementary viewpoint, and rather than consider the work-preserving slow-down of some fast parallel algorithm, we investigate the problem of the achievable speed-ups of computation while preserving the work of the best-known sequential algorithm for the same problem.
		Analogous but structurally different "interplays" have been used previously to improve the algorithmic efficiency of graph computations, selection, and list ranking.
		Some of the fundamental new algorithms may have practical value; for instance, we substantially improve the algorithmic performance of the parallel solution of triangular and Toeplitz linear systems of equations and the computation of the transitive closure of digraphs.
	epubs.siam.org /sam-bin/dbq/article/23216 (227 words)

	Definition of algorithmic information theory
		1: '''Algorithmic information theory''' is a field of study which attempts to capture...
		3: A primary concern of algorithmic topology, as its name suggests, is to develop eff...
		1: '''Algorithmic composition''' is the technique of using [[algori...
	www.wordiq.com /search/algorithmic+information+theory.html (751 words)

	General number field sieve - Enpsychlopedia (Site not responding. Last check: 2007-10-09)
		In mathematics, the general number field sieve is the most efficient algorithm known for factoring integers larger than 100 digits.
		The second-best-known algorithm for integer factorization is the Lenstra elliptic curve factorization method.
		It is better than the general number field sieve when factors are of small size, as it works by finding smooth values of order of the smallest prime divisor of n, and its running time depends on the size of this divisor.
	www.grohol.com /psypsych/Number_field_sieve (807 words)

	Algorithmic Solutions Software GmbH: HOME
		Algorithmic Solutions Software GmbH provides software and consulting in order to enhance software applications by algorithmic intelligence.
		Our algorithmic solutions are based on substantial industrial knowledge and deep theoretic competence.
		Template algorithms: support static graphs more about static graphs...
	www.algorithmic-solutions.com (498 words)

	Efficiency (Site not responding. Last check: 2007-10-09)
		The AIADA newsletter reported that the Tokyo Motor Show this year features a vast array of cars with emphasis on style, practicality, and the environment...
		Airport Receives 'Star of Energy Efficiency' Award in Washington DC October 20th - Recognition as One of the 'Greenest Airports In The World' DFW INTERNATIONAL...
		Hydrogen compressor to improve fuel cell efficiency - 20th October...
	www.wikiverse.org /efficiency (206 words)

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