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Accumulation
Accumulation may refer to: Finance * Accumulation function, a mathematical function defined in terms of the ratio future value to present value * Capital accumulation, the gathering of objects of value Science and engineering * Accumulate (higher-order function), a family of functions to analyze a recursive data structure in computer science * Bioaccumulation, of substances, such as pesticides or other chemicals in an organism * Glacier ice accumulation, an element in the glacier mass balance formula * Metabolic trapping, a localization mechanism of the synthesized radiocompounds in human body * Tree accumulation, in computer science, the process of accumulating data placed in tree nodes according to their tree structure * Accumulation point, another name for a limit point * Cumulative sum, for example cumulative distribution function, or cumulative death toll, summarized since start of a catastrophe Other *'' Accumulation: None'', a 2002 lo-fi album See also * * Acc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capital Accumulation
Capital accumulation is the dynamic that motivates the pursuit of profit, involving the investment of money or any financial asset with the goal of increasing the initial monetary value of said asset as a financial return whether in the form of profit, rent, interest, royalties or capital gains. The aim of capital accumulation is to create new fixed and working capitals, broaden and modernize the existing ones, grow the material basis of social-cultural activities, as well as constituting the necessary resource for reserve and insurance. The process of capital accumulation forms the basis of capitalism, and is one of the defining characteristics of a capitalist economic system.''Capital'', Encyclopedia on Marxists.org: http://marxists.org/glossary/terms/c/a.htm#capital Definition The definition of capital accumulation is subject to controversy and ambiguities, because it could refer to: *a '' net addition'' to existing wealth *a ''redistribution'' of wealth. Most often, ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Accumulation Point
In mathematics, a limit point, accumulation point, or cluster point of a set S in a topological space X is a point x that can be "approximated" by points of S in the sense that every neighbourhood of x with respect to the topology on X also contains a point of S other than x itself. A limit point of a set S does not itself have to be an element of S. There is also a closely related concept for sequences. A cluster point or accumulation point of a sequence (x_n)_ in a topological space X is a point x such that, for every neighbourhood V of x, there are infinitely many natural numbers n such that x_n \in V. This definition of a cluster or accumulation point of a sequence generalizes to nets and filters. The similarly named notion of a (respectively, a limit point of a filter, a limit point of a net) by definition refers to a point that the sequence converges to (respectively, the filter converges to, the net converges to). Importantly, although "limit point of a set" is syno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacier Ice Accumulation
Glacier ice accumulation occurs through accumulation of snow and other frozen precipitation, as well as through other means including rime ice (freezing of water vapor on the glacier surface), avalanching from hanging glaciers on cliffs and mountainsides above, and re-freezing of glacier meltwater as superimposed ice. Accumulation is one element in the glacier mass balance formula, with ablation counteracting. With successive years in which accumulation exceeds ablation, then a glacier will experience positive mass balance, and its terminus will advance. Accumulation zones Glaciologists subdivide glaciers into glacier accumulation zones, based on the melting and refreezing occurring. These zones include the dry snow zone, in which the ice entirely retains subfreezing temperatures and no melting occurs. Dry snow zones only occur within the interior regions of the Greenland and Antarctica ice sheets. Below the dry snow zone is the percolation Percolation (from Latin ''perc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Accumulation Function
The accumulation function ''a''(''t'') is a function defined in terms of time ''t'' expressing the ratio of the value at time ''t'' (future value) and the initial investment (present value). It is used in interest theory. Thus ''a''(0)=1 and the value at time ''t'' is given by: :A(t) = A(0) \cdot a(t). where the initial investment is A(0). For various interest-accumulation protocols, the accumulation function is as follows (with ''i'' denoting the interest rate and ''d'' denoting the discount rate): * simple interest: a(t)=1+t \cdot i * compound interest: a(t)=(1+i)^t * simple discount: a(t) = 1+\frac * compound discount: a(t) = (1-d)^ In the case of a positive rate of return, as in the case of interest, the accumulation function is an increasing function. Variable rate of return The logarithmic or continuously compounded return, sometimes called force of interest, is a function of time defined as follows: :\delta_=\frac\, which is the rate of change with time of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Accumulate (higher-order Function)
In functional programming, fold (also termed reduce, accumulate, aggregate, compress, or inject) refers to a family of higher-order functions that analyze a recursive data structure and through use of a given combining operation, recombine the results of recursively processing its constituent parts, building up a return value. Typically, a fold is presented with a combining function, a top node of a data structure, and possibly some default values to be used under certain conditions. The fold then proceeds to combine elements of the data structure's hierarchy, using the function in a systematic way. Folds are in a sense dual to unfolds, which take a ''seed'' value and apply a function corecursively to decide how to progressively construct a corecursive data structure, whereas a fold recursively breaks that structure down, replacing it with the results of applying a combining function at each node on its terminal values and the recursive results ( catamorphism, versus anamorphi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bioaccumulation
Bioaccumulation is the gradual accumulation of substances, such as pesticides or other chemicals, in an organism. Bioaccumulation occurs when an organism absorbs a substance at a rate faster than that at which the substance is lost or eliminated by catabolism and excretion. Thus, the longer the biological half-life of a toxic substance, the greater the risk of chronic poisoning, even if environmental levels of the toxin are not very high. Bioaccumulation, for example in fish, can be predicted by models. Hypothesis for molecular size cutoff criteria for use as bioaccumulation potential indicators are not supported by data. Biotransformation can strongly modify bioaccumulation of chemicals in an organism. Toxicity induced by metals is associated with bioaccumulation and biomagnification. Storage or uptake of metals faster than the rate at which an organism metabolizes and excretes lead to the accumulation of that metal. The presence of various chemicals and harmful substances i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metabolic Trapping
Metabolic trapping refers to a localization mechanism of synthesized radiocompounds in the human body. It can be defined as the intracellular accumulation of a radioactive tracer based on the relative metabolic activity of the body's tissues. It is a basic principle of the design of radiopharmaceuticals as metabolic probes for functional studies or tumor location. Metabolic trapping is the mechanism underlying the (PET) scan, an effective tool for detecting tumors, as there is a greater uptake of the target molecule by tumor tissue than by normal tissue. In order to use it as a diagnostic tool in medicine, scientists have studied the trapping of radioactive molecules within different tissues throughout the body. In 1978, Gallagher et al. studied glucose tagged with Fluorine-18 (F-18) to see how it metabolized in the tissues of different organs. This group studied how long it took the lungs, liver, kidneys, heart, and brain to metabolize radioactive glucose. They found the mole ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tree Accumulation
In computer science, tree accumulation is the process of accumulating data placed in tree nodes according to their tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ... structure. Formally, this operation is a catamorphism. Upward accumulation refers to accumulating on each node information about all descendants. Downward accumulation refers to accumulating on each node information of every ancestor. One application would be calculating national election results. Construct a tree with the root node as the entire nation and each level representing refined geographical areas such as states/provinces, counties/parishes, cities/townships, and polling districts as the leaves. By accumulating the vote totals from the polling districts, one can compute the vote totals for each of the lar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cumulative Distribution Function
In probability theory and statistics, the cumulative distribution function (CDF) of a real-valued random variable X, or just distribution function of X, evaluated at x, is the probability that X will take a value less than or equal to x. Every probability distribution supported on the real numbers, discrete or "mixed" as well as continuous, is uniquely identified by an ''upwards continuous'' ''monotonic increasing'' cumulative distribution function F : \mathbb R \rightarrow ,1/math> satisfying \lim_F(x)=0 and \lim_F(x)=1. In the case of a scalar continuous distribution, it gives the area under the probability density function from minus infinity to x. Cumulative distribution functions are also used to specify the distribution of multivariate random variables. Definition The cumulative distribution function of a real-valued random variable X is the function given by where the right-hand side represents the probability that the random variable X takes on a value less th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
None
None may refer to: *Zero, the mathematical concept of the quantity "none" * Empty set, the mathematical concept of the collection of things represented by "none" *''none'', an indefinite pronoun in the English language Music * ''None'' (Meshuggah EP), a 1994 EP by Swedish heavy metal band Meshuggah * ''None'' (Cloak of Altering EP), a 2013 EP by Dutch group Cloak of Altering Other uses *None (liturgy), the ninth hour of the traditional Christian liturgy * None, Piedmont, a commune in the province of Turin in the Italian region of Piedmont *Irreligion, a lack of religious affiliation * None of the above, a political expression for rejecting all available candidates See also *Nones (other) *Nothing (other) *Zero (other) *Nun (other) A nun is a member of a religious community of women. Nun, Nuns or NUN may also refer to: * Nun (band), an Australian music group * Nun (biblical figure) * Nun (letter), in many Semitic alphabets * Nun languages, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
