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Pareto principle

Pareto principle
The Pareto Principle asserts that only a "vital few" peapods produce the majority of peas. The Pareto principle (also known as the 80/20 rule, the law of the vital few, or the principle of factor sparsity)[1][2] states that, for many events, roughly 80% of the effects come from 20% of the causes.[3] Management consultant Joseph M. Juran suggested the principle and named it after Italian economist Vilfredo Pareto, who noted the 80/20 connection while at the University of Lausanne in 1896, as published in his first work, Cours d'économie politique. Essentially, Pareto showed that approximately 80% of the land in Italy was owned by 20% of the population. It is an axiom of business management that "80% of sales come from 20% of clients".[4] Richard Koch authored the book, The 80/20 Principle, which illustrated some practical applications of the Pareto principle in business management and life.[5] The Pareto principle is only tangentially related to Pareto efficiency. In economics[edit] Related:  Misc Stuff

Tao Te Ching Shang Pian[edit] Chapter 1 (第一章)[edit] Chapter 2 (第二章)[edit] Chapter 3 (第三章)[edit] Chapter 4 (第四章)[edit] Chapter 5 (第五章)[edit] Note: Chugou (芻狗, literally "grass dog") is a straw-made dog-shaped sacrifice used in ancient China. Chapter 6 (第六章)[edit] Chapter 7 (第七章)[edit] Chapter 8 (第八章)[edit] Chapter 9 (第九章)[edit] Chapter 10 (第十章)[edit] Chapter 11 (第十一章)[edit] Chapter 12 (第十二章)[edit] Chapter 13 (第十三章)[edit] Chapter 14 (第十四章)[edit] Chapter 15 (第十五章)[edit] Chapter 16 (第十六章)[edit] Chapter 17 (第十七章)[edit] Chapter 18 (第十八章)[edit] Chapter 19 (第十九章)[edit] Chapter 20 (第二十章)[edit] Chapter 21 (第二十一章)[edit] Chapter 22 (第二十二章)[edit] Chapter 23 (第二十三章)[edit] Chapter 24 (第二十四章)[edit] Chapter 25 (第二十五章)[edit] Chapter 26 (第二十六章)[edit] Chapter 27 (第二十七章)[edit] Chapter 28 (第二十八章)[edit] Chapter 29 (第二十九章)[edit] Chapter 30 (第三十章)[edit] Chapter 31 (第三十一章)[edit] Chapter 32 (第三十二章)[edit] Chapter 33 (第三十三章)[edit] Chapter 34 (第三十四章)[edit] Chapter 35 (第三十五章)[edit] Chapter 36 (第三十六章)[edit] Chapter 37 (第三十七章)[edit] Xia Pian[edit] Expand

Diminishing returns The law of diminishing returns (also law of diminishing marginal returns or law of increasing relative cost) states that in all productive processes, adding more of one factor of production, while holding all others constant ("ceteris paribus"), will at some point yield lower per-unit returns.[1] The law of diminishing returns does not imply that adding more of a factor will decrease the total production, a condition known as negative returns, though in fact this is common. For example, the use of fertilizer improves crop production on farms and in gardens; but at some point, adding more and more fertilizer improves the yield less per unit of fertilizer, and excessive quantities can even reduce the yield. A common sort of example is adding more workers to a job, such as assembling a car on a factory floor. At some point, adding more workers causes problems such as workers getting in each other's way or frequently finding themselves waiting for access to a part. History[edit] where

Power law An example power-law graph, being used to demonstrate ranking of popularity. To the right is the long tail, and to the left are the few that dominate (also known as the 80–20 rule). In statistics, a power law is a functional relationship between two quantities, where a relative change in one quantity results in a proportional relative change in the other quantity, independent of the initial size of those quantities: one quantity varies as a power of another. Empirical examples of power laws[edit] Properties of power laws[edit] Scale invariance[edit] One attribute of power laws is their scale invariance. , scaling the argument by a constant factor causes only a proportionate scaling of the function itself. That is, scaling by a constant simply multiplies the original power-law relation by the constant . and , and the straight-line on the log-log plot is often called the signature of a power law. Lack of well-defined average value[edit] A power-law has a well-defined mean over only if for where , and .

Parkinson's Law UK First edition book cover Originally, Parkinson's law is the adage that "work expands so as to fill the time available for its completion", and the title of a book which made it well-known. However, in current understanding, Parkinson's law is a reference to the self-satisfying uncontrolled growth of the bureaucratic apparatus in an organization. History[edit] Articulated by Cyril Northcote Parkinson as part of the first sentence of a humorous essay published in The Economist in 1955 and since republished online,[1][2] it was reprinted with other essays in the book Parkinson's Law: The Pursuit of Progress (London, John Murray, 1958). A current form of the law is not the one Parkinson refers to by that name in the article, but a mathematical equation describing the rate at which bureaucracies expand over time. Parkinson's Law was translated into many languages. Corollaries[edit] If you wait until the last minute, it only takes a minute to do.[5] the Asimov corollary to Parkinson's law:

Sexagenary cycle Historical method for reckoning time in China The sexagenary cycle, also known as the Stems-and-Branches or ganzhi (Chinese: 干支), is a cycle of sixty terms, each corresponding to one year, thus a total of sixty years for one cycle, historically used for recording time in China and the rest of the East Asian cultural sphere.[1] It appears as a means of recording days in the first Chinese written texts, the Shang oracle bones of the late second millennium BC. Its use to record years began around the middle of the 3rd century BC. The cycle and its variations have been an important part of the traditional calendrical systems in Chinese-influenced Asian states and territories, particularly those of Japan, Korea, and Vietnam, with the old Chinese system still in use in Taiwan, and to a lesser extent, in Mainland China.[3] This traditional method of numbering days and years no longer has any significant role in modern Chinese time-keeping or the official calendar. Overview[edit] History[edit]

Great piano sounds? John, Welcome to the forum. You've received some excellent advice from wrench45us. Having some experience with synthesizers and my search for the "perfect" digital/acoustic piano, I wouldn't expect either Dimension or Rapture to fill this role--that's not where their strengths lie. Dimension is excellent for looping and dance music. With synthesizers, you must pick the right tool for the job. I'm being rather narrow in my application here simply to illustrate a point. The best a. piano sounds come from romplers and modelers. By the way, PianoTek has a nice demo you can download. Might I suggest you extend your search to other forums like PianoWorld, Keyboard Magazine, Harmony Central, and others?

Preferential attachment Definition[edit] A preferential attachment process is a stochastic urn process, meaning a process in which discrete units of wealth, usually called "balls", are added in a random or partly random fashion to a set of objects or containers, usually called "urns". A preferential attachment process is an urn process in which additional balls are added continuously to the system and are distributed among the urns as an increasing function of the number of balls the urns already have. In the most commonly studied examples, the number of urns also increases continuously, although this is not a necessary condition for preferential attachment and examples have been studied with constant or even decreasing numbers of urns. Linear preferential attachment processes in which the number of urns increases are known to produce a distribution of balls over the urns following the so-called Yule distribution. for k ≥ k0 (and zero otherwise), where B(x, y) is the Euler beta function: History[edit]

Risk aversion Economics theory Risk aversion (red) contrasted to risk neutrality (yellow) and risk loving (orange) in different settings. Left graph: A risk averse utility function is concave (from below), while a risk loving utility function is convex. Middle graph: In standard deviation-expected value space, risk averse indifference curves are upward sloped. In economics and finance, risk aversion is the tendency of people to prefer outcomes with low uncertainty to those outcomes with high uncertainty, even if the average outcome of the latter is equal to or higher in monetary value than the more certain outcome.[1] Risk aversion explains the inclination to agree to a situation with a more predictable, but possibly lower payoff, rather than another situation with a highly unpredictable, but possibly higher payoff. Example[edit] Utility function of a risk-averse (risk-avoiding) individual Utility function of a risk-neutral individual Utility function of a risk-loving (risk-seeking) individual ). . where

Chinese Four Pillars of Destiny (Ba Zi) Calculator The year of your birth (with its corresponding animal sign) represents only the most general of characteristics - i.e., those which may be shared with everyone who happens to be born in that year. A much more detailed personal analysis is provided by exploring all Four Pillars, taking into account not only the year, but also the month, day, and hour of birth. Each of the pillars is made up of two characters: (1) a Heavenly Stem, representing the quality of elemental force, and (2) an Earthly Branch, representing the way this is expressed. There are ten Heavenly Stems, each combining one of the five classical Chinese elements with either positive (Yang) or negative (Yin) energy. The Ten Heavenly Stems Analysis of the Four Pillars involves considering each of the Pillars in turn. The Year Pillar The Year Pillar represents the characteristics that you may expect to share with the cohort of people who are born in the same year. The Month Pillar The Day Pillar The Hour Pillar Integrating the Pillars

best piano soft synth Electronic Musician picked Akoustik Piano as the best in their review of soft pianos (a year ago, though) - over Ivory. I'm sure Ivory is great, but Akoustik price dropped to $199 this year (NI seems to be getting more aggressive on pricing), so the difference in price is meaningful. Lots of pros seem to swear by Ivory, though. If you're lucky, you'll have friends who have the various software packages so you can try them out. If you're like most, though, you'll just to have to weigh the reviews and jump for one, for better or for worse. Too many choices for piano, and there are hot new contestants this year.

by raviii Jul 5

by raviii Jul 5

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