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  2. Luria–Delbrück experiment - Wikipedia

    en.wikipedia.org/wiki/Luria–Delbrück_experiment

    A small number of cells are used to inoculate parallel cultures in a non-selective medium. [11] The cultures are grown to saturation to obtain equal cell densities. The cells are plated onto selective media to obtain the number of mutants (r). Dilutions are plated onto rich medium to calculate the total number of viable cells ( N t). The number ...

  3. Trap (printing) - Wikipedia

    en.wikipedia.org/wiki/Trap_(printing)

    When printing at 150 lpi, traps are usually between 1/150 and 1/300 inch (0.48 pt and 0.24 pt, 0.16 mm and 0.08 mm). These values are usually multiplied by 1.5 or 2 when one of the colors is black. The trap is not visible since the lighter color is spread underneath the—almost—opaque black.

  4. List of spreadsheet software - Wikipedia

    en.wikipedia.org/wiki/List_of_spreadsheet_software

    Was one of the big three spreadsheets (the others being Lotus 123 and Excel). EasyOffice EasySpreadsheet – for MS Windows. No longer freeware, this suite aims to be more user friendly than competitors. Framework – for MS Windows. Historical office suite still available and supported. It includes a spreadsheet.

  5. Code-division multiple access - Wikipedia

    en.wikipedia.org/wiki/Code-division_multiple_access

    CDMA is a spread-spectrum multiple-access technique. A spread-spectrum technique spreads the bandwidth of the data uniformly for the same transmitted power. A spreading code is a pseudo-random code in the time domain that has a narrow ambiguity function in the frequency domain, unlike other narrow pulse codes. In CDMA a locally generated code ...

  6. Global spread of the printing press - Wikipedia

    en.wikipedia.org/wiki/Global_spread_of_the...

    The global spread of the printing press began with the invention of the printing press with movable type by Johannes Gutenberg in Mainz, Germany c. 1439. [1] Western printing technology was adopted in all world regions by the end of the 19th century, displacing the manuscript and block printing .

  7. Print culture - Wikipedia

    en.wikipedia.org/wiki/Print_culture

    The printing press, some may argue, is not a part of print culture, but had a substantial impact upon the development of print culture through the times. The printing press brought uniform copies and efficiency in print. It allowed a person to make a living from writing. Most importantly, it spread print throughout society.

  8. Rotary printing press - Wikipedia

    en.wikipedia.org/wiki/Rotary_printing_press

    Early rotary newspaper printing press in Bristol, 1858. William Nicholson filed a 1790 patent for a rotary press. The rotary press itself is an evolution of the cylinder press, also patented by William Nicholson, invented by Beaucher of France in the 1780s and by Friedrich Koenig in the early 19th century.

  9. Test functions for optimization - Wikipedia

    en.wikipedia.org/wiki/Test_functions_for...

    Here some test functions are presented with the aim of giving an idea about the different situations that optimization algorithms have to face when coping with these kinds of problems. In the first part, some objective functions for single-objective optimization cases are presented.