Search results
Results From The WOW.Com Content Network
Convex geometry - the branch of geometry studying convex sets, mainly in Euclidean space. Contains three sub-branches: general convexity, polytopes and polyhedra, and discrete geometry. Convex hull (aka convex envelope) - the smallest convex set that contains a given set of points in Euclidean space. Convex lens - a lens in which one or two ...
During his diving career, he set numerous depth and cave penetration records. [10] [13] Exley was the first person in the history of technical SCUBA diving to dive below 800 feet (240 m), [14] a feat only 20 people have performed as of 2021. His carefully planned multistage decompressions from these dives, in open water (not in a decompression ...
Deep diving involves a much greater danger of all of these, and presents the additional risk of oxygen toxicity, which may lead to convulsions underwater. Very deep diving using a helium-oxygen mixture or a hydrogen-helium-oxygen mixture carries the risk of high-pressure nervous syndrome and hydrogen narcosis.
Large unwieldy lighting systems were problematic to early underwater videography. And last, underwater objects viewed from an airspace with a flat window, such as the eye inside a mask or the camera inside a housing, appear to be about 25% larger than they are. The photographer needs to move farther back to get the subject into the field of view.
The Bathysphere on display at the National Geographic museum in 2009. The Bathysphere (from Ancient Greek βαθύς (bathús) 'deep' and σφαῖρα (sphaîra) 'sphere') was a unique spherical deep-sea submersible which was unpowered and lowered into the ocean on a cable, and was used to conduct a series of dives off the coast of Bermuda from 1930 to 1934.
A portion of a diving project that can be safely supervised by one person, which can be a single dive or a number of dives. [20] diving procedure Sequence of actions used to achieve a specific outcome during a diving operation. Often standardised, and based on experience of the procedure being safe and efficient.
By wearing a flat diving mask, humans can see clearly underwater. [2] [7] [8] The mask's flat window separates the eyes from the surrounding water by a layer of air. Light rays entering from water into the flat parallel window change their direction minimally within the window material itself. [2]
A deep CNN of (Dan Cireșan et al., 2011) at IDSIA was 60 times faster than an equivalent CPU implementation. [12] Between May 15, 2011, and September 10, 2012, their CNN won four image competitions and achieved SOTA for multiple image databases. [13] [14] [15] According to the AlexNet paper, [1] Cireșan's earlier net is "somewhat similar."