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Python (missile) The newest and the oldest member of the Python family of AAM for comparisons, Python-5 (displayed lower-front) and Shafrir-1 (upper-back). The Rafael Python (פיתון) is a family of air-to-air missiles (AAMs) built by the Israeli weapons manufacturer Rafael Advanced Defense Systems, formerly RAFAEL Armament Development ...
2.4 GHz helical antenna radiation pattern (NEC simulation) The Numerical Electromagnetics Code, or NEC, is a popular antenna modeling computer program for wire and surface antennas. It was originally written in FORTRAN during the 1970s by Gerald Burke and Andrew Poggio of the Lawrence Livermore National Laboratory.
An improved "shear" electromagnetic lock was patented on May 2, 1989, by Arthur, Richard and David Geringer of Security Door Controls, an access control hardware manufacturing firm. The device outlined in their designs was the same in principle as the modern magnetic lock consisting of an electromagnet and an armature plate.
e. The New Revised Standard Version (NRSV) is a translation of the Bible in contemporary English. Published in 1989 by the National Council of Churches, [8] the NRSV was created by an ecumenical committee of scholars "comprising about thirty members". [9] The NRSV relies on recently published critical editions of the original Hebrew, Aramaic ...
Electromagnetically induced transparency. The effect of EIT on a typical absorption line. A weak probe normally experiences absorption shown in blue. A second coupling beam induces EIT and creates a "window" in the absorption region (red). This plot is a computer simulation of EIT in an InAs/GaAs quantum dot.
An electronic lock (or electric lock) is a locking device which operates by means of electric current. Electric locks are sometimes stand-alone with an electronic control assembly mounted directly to the lock. Electric locks may be connected to an access control system, the advantages of which include: key control, where keys can be added and ...
A magnetic keyed padlock. A magnetic keyed lock or magnetic-coded lock is a locking mechanism whereby the key utilizes magnets as part of the locking and unlocking mechanism. Magnetic-coded locks encompass knob locks, cylinder locks, lever locks, and deadbolt locks as well as applications in other security devices.
Semiconductor saturable-absorber mirror. Semiconductor saturable-absorber mirrors (SESAMs) are a type of saturable absorber used in mode locking lasers. Semiconductor saturable absorbers were used for laser mode-locking as early as 1974 when p-type germanium was used to mode lock a CO 2 laser which generated pulses of around 500 picoseconds.