an artificial reef is a man-made underwater structure, typically built to promote marine life in areas with a generally featureless bottom, to control erosion, block ship passage, block the use of tling nets, or improve surfing. many reefs are built using objects that were built for other purposes, for example by sinking oil rigs, scuttling ships, or by deploying rubble or construction debris. other artificial reefs are purpose built from pvc or concrete. shipwrecks may become artificial reef
an artificial urinary sphincter aus is an implanted device to treat moderate to severe stress urinary incontinence, most commonly in men.the aus is designed to supplement the function of the natural urinary sphincter that restricts urine flow out of the bladder
an artificial island or man-made island is an island that has been constructed by people and natural means. artificial islands may vary in size from small islets reclaimed solely to support a single pillar of a building or structure, to those that support entire communities and cities.
although composite lumber may resist these marring effects better than other materials, it will still show signs of wear over time. composite lumber often has a plastic-like or synthetic appearance. although manufacturers do mold the product with a wood grain or brush stroke pattern, some consumers simply do not like the artificial sheen.
synthetic rutile can be made in a variety of colors by doping. the high refractive index gives an adamantine luster and strong refraction that leads to a diamond -like appearance. the near-colorless diamond substitute is sold as 'titania', which is the old-fashioned chemical name for this oxide.
the burnt nodules were ground to a fine powder. this product, made into a mortar with sand, set in 5–15 minutes. the success of roman cement led other manufacturers to develop rival products by burning artificial mixtures of clay and chalk. history
artificial disc replacement adr , or total disc replacement tdr , is a type of arthroplasty.it is a surgical procedure in which degenerated intervertebral discs in the spinal column are replaced with artificial disc implants in the lumbar lower or cervical upper spine. the procedure is used to treat chronic, severe low back pain and cervical pain resulting from degenerative disc disease.
this product, made into a mortar with sand, set in 5–15 minutes. the success of 'roman cement' led other manufacturers to develop rival products by burning artificial hydraulic lime cements of clay and chalk. roman cement quickly became popular but was largely replaced by portland cement in the 1850s. 19th century
this is a list of artificial islands.currently, artificial islands are an expensive -- but in some cases highly profitable -- option for many cities which lack land such as tokyo's odaiba and fukuoka's island city project . in the future they may be common sites as many cities especially asian cities around the world face severe urban land shortages and congestion.
the dune of pilat french: dune du pilat, official name , also called grande dune du pilat is the tallest sand dune in europe.it is located in la teste-de-buch in the arcachon bay area, france, 60 km from bordeaux.. with more than one million visitors per year, the dune of pilat is a famous tourist destination.
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artificial leather, also called synthetic leather, is a material intended to substitute for leather in upholstery, clothing, footwear, and other uses where a leather-like finish is desired but the actual material is cost-prohibitive or unsuitable. artificial leather is marketed under many names, including 'leatherette', 'faux leather', 'vegan .
fieldturf is a brand of artificial turf playing surface. it is manufactured and installed by fieldturf tarkett, a division of french company tarkett inc. fieldturf is headquartered in montreal, quebec, canada, and its primary manufacturing facility is located in calhoun, georgia, united states.
aquaria: sand makes a low-cost aquarium base material which some believe is better than gravel for home use. it is also a necessity for saltwater reef tanks, which emulate environments composed largely of aragonite sand broken down from coral and shellfish. artificial reefs: geotextile bagged sand can serve as the foundation for new reefs.
artificial or synthetic, the collective term for a number of proprietary man-made surfaces in use at a number of locations around the world. the style of racing differs between surfaces, with dirt races tending to have the fastest pace, while turf racing often comes down to a sprint in the stretch. races on artificial surfaces tend to play out somewhere in between.
geosynthetics are synthetic products used to stabilize terrain. they are generally polymeric products used to solve civil engineering problems. this includes eight main product categories: geotextiles, geogrids, geonets, geomembranes, geosynthetic clay liners, geofoam, geocells and geocomposites.the polymeric nature of the products makes them suitable for use in the ground where high levels of .