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MEAN (MongoDB, Express.js, AngularJS (or Angular), and Node.js) [1] is a source-available JavaScript software stack for building dynamic web sites and web applications. [2] A variation known as MERN replaces Angular with React.js front-end, [3] [4] and another named MEVN use Vue.js as front-end.
Angular (also referred to as Angular 2+) [4] is a TypeScript-based free and open-source single-page web application framework. It is developed by Google and by a community of individuals and corporations. Angular is a complete rewrite from the same team that built AngularJS.
[3] Any closed convex semialgebraic set in the plane can be written as a feasible region of a SOCP, [ 8 ] . However, it is known that there exist convex semialgebraic sets of higher dimension that are not representable by SDPs; that is, there exist convex semialgebraic sets that can not be written as the feasible region of a SDP (nor, a ...
The Pinaceae (/ p ɪ ˈ n eɪ s iː ˌ iː,-s i ˌ aɪ /), or pine family, are conifer trees or shrubs, including many of the well-known conifers of commercial importance such as cedars, firs, hemlocks, piñons, larches, pines and spruces.
A mature female big-cone pine (Pinus coulteri) cone, the heaviest pine cone A young female cone on a Norway spruce (Picea abies) Immature male cones of Swiss pine (Pinus cembra) A conifer cone , or in formal botanical usage a strobilus , pl. : strobili , is a seed-bearing organ on gymnosperm plants, especially in conifers and cycads .
Pinus rigida, the pitch pine, [2] [3] is a small-to-medium-sized pine. It is native to eastern North America , primarily from central Maine south to Georgia and as far west as Kentucky. It is found in environments which other species would find unsuitable for growth, such as acidic, sandy, and low-nutrient soils.
The leaves are in fascicles of three, [6] needle-like, yellow-green, twisted, and 9–15 centimeters (3 + 1 ⁄ 2 –6 in) long. The cones are resin-sealed and irregularly shaped, [4] 8–16 cm (3 + 1 ⁄ 4 – 6 + 1 ⁄ 4 in) long and clustered in whorls of three to six on the branches. The scales end in a short stout prickle.
It is commonly mined for use as loose construction aggregate in Europe, the Southwestern United States, and Japan. Another major use of cinders is in manufacture of concrete and cinder blocks . Scoria is also used in the construction of flexible, long-lasting roadbeds , due to its high strength and high angles of internal friction.