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  2. Exponential growth - Wikipedia

    en.wikipedia.org/wiki/Exponential_growth

    Exponential growth is a process that increases quantity over time at an ever-increasing rate. It occurs when the instantaneous rate of change (that is, the derivative) of a quantity with respect to time is proportional to the quantity itself. Described as a function, a quantity undergoing exponential growth is an exponential function of time ...

  3. Urban decay - Wikipedia

    en.wikipedia.org/wiki/Urban_decay

    Desolate cityscape known as greyfield land or urban prairie. Since the 1970s and 1980s, urban decay has been a phenomenon associated with some Western cities, especially in North America and parts of Europe. Cities have experienced population flights to the suburbs and exurb commuter towns; often in the form of white flight. [1]

  4. Exponential decay - Wikipedia

    en.wikipedia.org/wiki/Exponential_decay

    Exponential decay. A quantity undergoing exponential decay. Larger decay constants make the quantity vanish much more rapidly. This plot shows decay for decay constant (λ) of 25, 5, 1, 1/5, and 1/25 for x from 0 to 5. A quantity is subject to exponential decay if it decreases at a rate proportional to its current value.

  5. Gompertz function - Wikipedia

    en.wikipedia.org/wiki/Gompertz_function

    The Gompertz curve or Gompertz function is a type of mathematical model for a time series, named after Benjamin Gompertz (1779–1865). It is a sigmoid function which describes growth as being slowest at the start and end of a given time period. The right-side or future value asymptote of the function is approached much more gradually by the ...

  6. Eutrophication - Wikipedia

    en.wikipedia.org/wiki/Eutrophication

    Thus, eutrophication has been defined as "degradation of water quality owing to enrichment by nutrients which results in excessive plant (principally algae) growth and decay." [8] Eutrophication was recognized as a water pollution problem in European and North American lakes and reservoirs in the mid-20th century. [9]

  7. Malthusian growth model - Wikipedia

    en.wikipedia.org/wiki/Malthusian_growth_model

    A Malthusian growth model, sometimes called a simple exponential growth model, is essentially exponential growth based on the idea of the function being proportional to the speed to which the function grows. The model is named after Thomas Robert Malthus, who wrote An Essay on the Principle of Population (1798), one of the earliest and most ...

  8. Urban renewal - Wikipedia

    en.wikipedia.org/wiki/Urban_renewal

    Urban renewal (also called urban regeneration in the United Kingdom and urban redevelopment in the United States [1]) is a program of land redevelopment often used to address urban decay in cities. [2] Urban renewal involves the clearing out of blighted areas in inner cities in favour of new housing, businesses, and other developments.

  9. 60 People Share Which Adult Problems Caught Them By Surprise

    www.aol.com/60-people-share-adult-problems...

    Image credits: Texas_sucks15 #24. How much constant work it is to take care of yourself. Exercise, add weight training as you age to keep bones strong, healthy eating, which means meal planning ...

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