# edge control
## English
### Etymology

From edge +‎ control.

### Noun

edge control (uncountable)
* (cosmetics) A hair product formulated to hold down baby or fine hair.
* (skating, skiing, snowboarding) The controlled use and placement of the edge of a skate, ski, or snowboard.
** 1967 December, Doug Pfeiffer, “Instruction Corner”, in Skiing, volume 20, number 3, page 111:As a gauge of its importance, consider that when an instructor or racer speaks of someone having amazing edge control, he means that that skier is a master of the slopes.
** 1997, Brian Boitano, Suzanne Harper, Boitano's Edge: Inside The Real World Of Figure Skating, page 27:Many people say that skaters who had to do figures learned to freeskate better because figures teach you edge control.
** 2010, Doug Werner, Snowboarder's Start-Up: A Beginner's Guide to Snowboarding, page 3:Skateboards roll. They do not slide. The demands of edge control aren't involved in the physics of this sport.
* (kayaking) A skill in edging; the ability to maintain one gunwale higher than the other at a controlled angle.
** 2002, Franco Ferrero, Canoe and Kayak Handbook, page 51:These help keep the knees locked into the side of the kayak and help with edge control.
** 2017, Nigel Foster, The Art of Kayaking: Everything You Need to Know About Paddling, page 43:Analyze your edge control to figure out exactly what you need to do with your knee, foot, leg, hip, and body.
** 2019, Ken Whiting, Anna Levesque, Kevin Varette, Whitewater Kayaking:This provides additional edge control over your kayak and helps keep your butt from falling out of the seat when you are upside-down.
* (aviation) The management and manipulation of the edges of an aircraft's wings or control surfaces to enhance performance and stability.
** 1975, Prediction of Unsteady Aerodynamic Loadings Caused by Leading Edge and Trailing Edge Control Surface Motions in Subsonic Compressible Flow, page 63:Trailing edge control surface configurations may be composed of a full span, inboard partial-span, outboard tip partial-span, or up to six individual control surfaces, including side-by-side common edge control surfaces, and nested controls.
* (design) Control over the exact placement of edges on a line or shape one is mapping, cutting, or etching.
** 1984, Aluminum Association Shape Control Workshop Papers, page 22:We do not feel that it is necessary to go below 3 inch rotors since an effective edge control strategy will control the narrow edge shape problem without an accurate measurement of the problem.
** 2011, Hui Xuan Zhang, Ye Han, Fu Xiao Chen, Materials and Computational Mechanics, page 134:Edge control not only helps to meet the need for strip shape quality, but also improve the yield of strip.
** 2018, William S. Levine, The Control Handbook, pages 11-15:Center and edge control of linewidth and isolated and nested lines have been the primary control metrics of interest for plasma etching .
** 2020, Pengfei Hu, Chunming He, “Edge Computing-Based Solution and Framework for Software-Defined Industrial Intelligent Control in Industrial Internet of Things”, in Huansheng Ning, Feifei Shi, editor, Cyberspace Data and Intelligence, and Cyber-Living, Syndrome, and Health, page 148:From the perspective of cyber-physical space mapping, the technologies of software definition and virtualization modeling are extended to edge hardware resources (including: terminal device resources, edge control device resources, edge computing resources, edge storage resources) and edge application services.
* (law enforcement) The management of an unpredictable situation in order to prevent it from becoming physically dangerous.
** 2012, Carol Archbold, Policing: A Text/Reader, page 399:It is conditioned by edge control, minimizing threats to personal danger, resolving the encounter, avoiding excessive paperwork, and getting on with something more interesting.
** 2014, John P. Crank, Understanding Police Culture, page 174:In this section I describe edge control as a phenomenon associated with the contingent (or unpredictable) nature of police-citizen interactions.
** 2018, Michael Caldero, Jeffrey Dailey, Brian Withrow, Police Ethics: The Corruption of Noble Cause, page 199:A great deal of police work is about edge control.

#### Usage notes

* In the context of aviation, the term edge control is usually qualified by the name of the edge being manipulated, as in leading-edge control or trailing-edge control.