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Barbed wire. Barbed wire, also known as barb wire, is a type of steel fencing wire constructed with sharp edges or points arranged at intervals along the strands. Its primary use is the construction of inexpensive fences, and it is also used as a security measure atop walls surrounding property. As a wire obstacle, it is a major feature of the ...
Windows, OS X, Linux, Unix. Type. Diagramming software. License. GPL-2.0-or-later. Website. GNOME Apps. Dia (/ ˈdiːə /) [3] is free and open source general-purpose diagramming software, developed originally by Alexander Larsson. [1] It uses a controlled single document interface (SDI) similar to GIMP and Inkscape.
Concertina wire. Concertina wire or Dannert wire[1] is a type of barbed wire or razor wire that is formed in large coils which can be expanded like a concertina. In conjunction with plain barbed wire (and/or razor wire/tape) and steel pickets, it is most often used to form military-style wire obstacles. It is also used in non-military settings ...
Patent drawing for Joseph F. Glidden's Improvement to barbed wire. Glidden began work on ways to make a useful barbed wire to fence cattle in 1873. He made his best design of barbed wire by using a coffee mill to create the barbs. Glidden placed the barbs along a wire and then twisted another wire around it to keep the barbs in place, in a ...
Wire obstacle. In the military science of fortification, wire obstacles are defensive obstacles made from barbed wire, barbed tape or concertina wire. They are designed to disrupt, delay and generally slow down an attacking enemy. During the time that the attackers are slowed by the wire obstacle (or possibly deliberately channelled into ...
The Joseph F. Glidden House is located in the United States in the DeKalb County, Illinois city of DeKalb. It was the home to the famed inventor of barbed wire Joseph Glidden. The barn, still located on the property near several commercial buildings, is said to be where Glidden perfected his improved version of barbed wire which would ...
In 2011, the company started publishing its hosted service for the mxGraph web application under a separate brand, Diagramly with the domain "diagram.ly". [12]After removing the remaining use of Java applets from its web app, the service rebranded as draw.io in 2012 because the ".io suffix is a lot cooler than .ly", said co-founder David Benson in a 2012 interview.
GeoGebra is software that combines geometry, algebra and calculus for mathematics education in schools and universities. It is available free of charge for non-commercial users. [6] License: open source under GPL license (free of charge) Languages: 55. Geometry: points, lines, all conic sections, vectors, parametric curves, locus lines.