Related Experiment Video
Updated: Jun 12, 2026
09:26
Pattern Generation for Micropattern Traction Microscopy
Published on: February 17, 2022
Abstract:
Developments of interest to the optics community reported in NASA Tech Briefs 11, No. 2 (February 1987) are given below. Further information can be obtained by writing to NASA STI Facility, Manager TU Division, P.O. Box 8757, BWI Airport, MD 21240-0757, and giving the identifying number.
Related Concept Videos
01:06Fixed Action Patterns
A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
01:23Design Example
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...