Wikipedia foundation.
Counter slab — and slab are the matching halves of a fossil bearing matrix formed in sedimentary deposits. When excavated the matrix may be split along the natural grain or cleavage of the rock. A fossil embedded in the sediment may then also split down the… … Wikipedia
Bellevue Homestead — in South East Queensland is heritage listed and was restored by the National Trust of Queensland [2] between 1975 and 1980 after moving the buildings from the banks of the Brisbane River to the nearby town of Coominya to avoid being flooded. The… … Wikipedia
Metamaterial antenna — This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the Z element inside the square that acts as a metamaterial, greatly… … Wikipedia
Lewis (lifting appliance) — For other uses, see Lewis (disambiguation). Lewises in a stonemasonry workshop … Wikipedia
Backcountry snowboarding — is a unique sport that is rapidly growing in popularity. The sport of backcountry snowboarding is characterized by the fresh tracks and deep powder that only the slopes of a remote mountainside can offer. The sport is a completely separate… … Wikipedia
Anthropology and Archaeology — ▪ 2009 Introduction Anthropology Among the key developments in 2008 in the field of physical anthropology was the discovery by a large interdisciplinary team of Spanish and American scientists in northern Spain of a partial mandible (lower… … Universalium
Negative index metamaterials — A negative index metamaterial causes light to refract, or bend, differently than in more common positive refractive index materials. Negative index metamaterials or negative index materials (NIM) are artificial structures where the refractive… … Wikipedia
Geotechnical engineering — [ Boston s Big Dig presented geotechnical challenges in an urban environment.] Geotechnical engineering is the branch of civil engineering concerned with the engineering behavior of earth materials. Geotechnical engineering includes investigating … Wikipedia
building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… … Universalium
plate tectonics — plate tectonic, adj. Geol. a theory of global tectonics in which the lithosphere is divided into a number of crustal plates, each of which moves on the plastic asthenosphere more or less independently to collide with, slide under, or move past… … Universalium
