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  2. Generation time - Wikipedia

    en.wikipedia.org/wiki/Generation_time

    One may then define the generation time as the time it takes for the population to increase by a factor of . For example, in microbiology , a population of cells undergoing exponential growth by mitosis replaces each cell by two daughter cells, so that R 0 = 2 {\displaystyle \textstyle R_{0}=2} and T {\displaystyle T} is the population doubling ...

  3. Doubling time - Wikipedia

    en.wikipedia.org/wiki/Doubling_time

    For example, with an annual growth rate of 4.8% the doubling time is 14.78 years, and a doubling time of 10 years corresponds to a growth rate between 7% and 7.5% (actually about 7.18%). When applied to the constant growth in consumption of a resource, the total amount consumed in one doubling period equals the total amount consumed in all ...

  4. Population dynamics - Wikipedia

    en.wikipedia.org/wiki/Population_dynamics

    The doubling time (t d) of a population is the time required for the population to grow to twice its size. [24] We can calculate the doubling time of a geometric population using the equation: N t = λ t N 0 by exploiting our knowledge of the fact that the population (N) is twice its size (2N) after the doubling time. [20]

  5. Euler–Lotka equation - Wikipedia

    en.wikipedia.org/wiki/Euler–Lotka_equation

    In the study of age-structured population growth, probably one of the most important equations is the Euler–Lotka equation.Based on the age demographic of females in the population and female births (since in many cases it is the females that are more limited in the ability to reproduce), this equation allows for an estimation of how a population is growing.

  6. Duty cycle - Wikipedia

    en.wikipedia.org/wiki/Duty_cycle

    The "on time" for a 60% duty cycle could be a fraction of a second, a day, or even a week, depending on the length of the period. Duty cycles can be used to describe the percent time of an active signal in an electrical device such as the power switch in a switching power supply or the firing of action potentials by a living system such as a ...

  7. Scott A. McGregor - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/scott-a-mcgregor

    From June 2010 to December 2012, if you bought shares in companies when Scott A. McGregor joined the board, and sold them when he left, you would have a 7.1 percent return on your investment, compared to a 32.4 percent return from the S&P 500.

  8. Exponential growth - Wikipedia

    en.wikipedia.org/wiki/Exponential_growth

    Often the independent variable is time. Described as a function, a quantity undergoing exponential growth is an exponential function of time, that is, the variable representing time is the exponent (in contrast to other types of growth, such as quadratic growth). Exponential growth is the inverse of logarithmic growth.

  9. Hutham S. Olayan - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/hutham-s-olayan

    From January 2008 to December 2012, if you bought shares in companies when Hutham S. Olayan joined the board, and sold them when she left, you would have a -63.9 percent return on your investment, compared to a -2.8 percent return from the S&P 500.