enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Sylvester's sequence - Wikipedia

   en.wikipedia.org/wiki/Sylvester's_sequence

   Sylvester's sequence is named after James Joseph Sylvester, who first investigated it in 1880. [1] Its values grow doubly exponentially, and the sum of its reciprocals forms a series of unit fractions that converges to 1 more rapidly than any other series of unit fractions. [2] The recurrence by which it is defined allows the numbers in the ...

3. Snellen chart - Wikipedia

   en.wikipedia.org/wiki/Snellen_chart

   Snellen chart. Purpose. Snellen chart is used to estimate visual acuity (last three rows are 20/15, 20/13 and 20/10) A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula ...

4. Mat (picture framing) - Wikipedia

   en.wikipedia.org/wiki/Mat_(picture_framing)

   In the picture framing industry, a mat (or matte, or mount in British English) is a thin, flat piece of paper -based material included within a picture frame, which serves as additional decoration and to perform several other, more practical functions, such as separating the art from the glass. Putting mats in a frame is called matting, a term ...

5. Aspect ratio (image) - Wikipedia

   en.wikipedia.org/wiki/Aspect_ratio_(image)

   Aspect ratio (image) The aspect ratio of an image is the ratio of its width to its height. It is expressed as two numbers separated by a colon, width:height. Common aspect ratios are 1.85:1 and 2.40:1 in cinematography, 4:3 and 16:9 in television, and 3:2 in still photography.

6. Image sensor format - Wikipedia

   en.wikipedia.org/wiki/Image_sensor_format

   In digital photography, the image sensor format is the shape and size of the image sensor. The image sensor format of a digital camera determines the angle of view of a particular lens when used with a particular sensor. Because the image sensors in many digital cameras are smaller than the 24 mm × 36 mm image area of full-frame 35 mm cameras ...

7. Bayesian estimation of templates in computational anatomy

   en.wikipedia.org/wiki/Bayesian_Estimation_of...

   [30] [31] Templates were generated using Bayesian template estimation data back to Ma, Younes and Miller. [32] Shown in the accompanying Figure is an example of subcortical structure templates generated from T1-weighted magnetic resonance imagery by Tang et al. [11] [12] [13] for the study of Alzheimer's disease in the ADNI population of subjects.

8. American Airlines Flight 77 - Wikipedia

   en.wikipedia.org/wiki/American_Airlines_Flight_77

   Three frames from the security camera video of Flight 77 hitting the Pentagon, the aircraft can be made out on Frame 2 just above the tan post furthest from the building. The terrorists launched their assault at 08:51, by which point the North Tower had been on fire for around five minutes and Flight 175 was within 12 minutes of striking the ...

9. Fraction - Wikipedia

   en.wikipedia.org/wiki/Fraction

   A unit fraction is a common fraction with a numerator of 1 (e.g., ⁠ 1 / 7 ⁠). Unit fractions can also be expressed using negative exponents, as in 2 −1, which represents 1/2, and 2 −2, which represents 1/(2 2) or 1/4. A dyadic fraction is a common fraction in which the denominator is a power of two, e.g. ⁠ 1 / 8 ⁠ = ⁠ 1 / 2 3 ⁠.