This subextension is called a separable closure of K. Since a separable extension of a separable extension is again separable, there are no finite separable extensions of K < sup > sep </ sup >, of degree > 1.

Since the 1990s the region has experienced an exceptionally tumultuous period in its regional economy with the collapse of large portions of the ground fishery throughout Atlantic Canada, the closing of coal mines and a steel mill on Cape Breton Island, and the closure of military bases in all three provinces.

Since the closure, the building has been derelict while Hillingdon Council seek a buyor for the site.

Since Camp X-Ray's closure and the subsequent opening of Camp Delta, JTF-160 and 170 have been combined into Joint Task Force Guantanamo ( JTF-GTMO ).

Since the closure of Garretts, the town's economy has been dominated by the two nuclear power stations on the coast at Sizewell: the now decommissioned Magnox reactor of Sizewell A and the more modern Pressurised Water Reactor of Sizewell B.

Since the 1990s, Monson has increased again in tourism and, with the closure of Moosehead Manufacturing, many consider Monson ( as well as much of Piscataquis County ), to cater towards tourism.

Since its closure on 17 October 2004, the landlord has applied for planning permission to turn the pub into flats.

Since closure of the Kemble to Cirencester branch line in 1964 the town has become one of the largest in the region without its own rail station.

Since its closure most of the base has since been annexed as part of Mesa, Arizona.

Since the closure of the rival Great Central Main Line in the 1960s, the Midland has been the only direct main-line rail link between London and the East Midlands and South Yorkshire.

Since its closure in June 1998 a new housing development has been built on its site which includes Dashwood Primary School.

Since closure, film production usage has continued, with the station appearing as itself and, with appropriate signage, other parts of the network.

Since 2000, the university launched a major restructuring programme, which, specifically, translated into a total image rebrand in 2003, the closure of a number of campuses over 2005 – 2011, the expansion of other campuses and generally the consolidation of the university's activities on fewer, bigger campuses in north London.

Since the closure of the town's cottage hospital in 2004 the nearest hospitals are Amersham Hospital, Wycombe General Hospital and Stoke Mandeville Hospital the latter providing accident and emergency services.

Since OCS Portsea's closure in 1985, all Australian Army Officer training has been conducted at the Royal Military College, Duntroon Canberra.

Since the closure and redevelopment of Bridgend General Hospital in the 1990s, acute-care and accident and emergency services have been provided by the Princess of Wales Hospital.

Since its closure in 1989, projects have been constructed on the grounds of the former theme park with varying success, and portions of the property have been sold to several companies.

Since its closure in 2010 alternative comedy has found new venues including Foxwood theatre, Picollinos and various others.

Since its closure the building has fallen into disrepair, and despite numerous planning applications being submitted, it remains derelict.

Since the closure of the stores, customers can only contact eircom online or by telephone.

Since Technōs Japan's closure, a company called Million has purchased the former intellectual properties of Technōs Japan and are producing new games based on them.

Since then the Royal Arsenal would have been guarded, until its closure, by the War Office Police Force, who became in 1971 the Ministry of Defence Police Force.

Since the closure of CFB Summerside in 1990, the city has been aggressive in courting new business opportunities and has created an Economic Development Office for the purpose of encouraging investment in the city.

Since then a series of financial crises have pushed the club to the brink of closure.

Since the closure was an initiated action by the Coast Guard, it was not subject to the Base Realignment and Closure process.

Since the hazards of poor communication are so great, p can be justified as a habitable site only on the basis of unusual productivity such as is made available by a waterfall for milling purposes, a mine, or a sugar maple camp.

Since then, more than a million visitors, from all 50 states and more than 30 foreign countries, have enjoyed the ride into the mountain on the underground mine tour train.

Since 1804, the mine owner, Christopher Blackett had been investigating the possibilities of working the mine's short colliery tramroad by steam traction.

Since Narita and his crew weren't allowed to drill holes for lights in mine shafts, illumination had to come from practical lights that appeared to be part of the set.

Since anti-tank mines rely on a concentrated explosion to destroy a tank, they are useless when turned upside-down ; as the tank runs over the mine, it will expend its blast down instead of upwards, causing insignificant damage, if any.

Since 1992, the visitors ' mine of Rammelsberg has become a UNESCO World heritage site.

Since Great Canadian Oil Sands ( now Suncor ) started operation of its mine in 1967, bitumen has been extracted on a commercial scale from the Athabasca Oil Sands by surface mining.

Since 1998, Kim Jong Il budgeted 8. 2 million USD to dewater the mine, and the mine was recovered using electricity and equipment provided by China.

Since the start of 2007, HALO has been conducting a re-assessment to identify the remaining mines problem and the assets required to clear the remaining mine and Explosive Remnants of War ( ERW ) problem in a reasonable time frame.

Since 2000 HALO has provided the only large-scale mine clearance capacity in Nagorno Karabakh and over the last 10 years HALO has cleared over 236 square kilometres of contaminated land and returned it to previously impacted communities.

Since 1925, carpet-weaving, wood processing, iron smelting brick and gypsum plants were established, the Nalaikh coal mine, power plant and the leather factory in Altanbulag was expanded.

Since the last coal mine was closed in 1971 Gladbeck is fighting against a high rate of unemployment, activating the structural change.

) Since operations began in 1983, Argyle's open pit mine has produced over of rough diamonds.

Since 1973, Freeport has operated the world's largest gold mine, located in Indonesia's Papua province.

Since Burrage did not have the capital to develop a mine, he approached the Guggenheim Brothers.

Since the suffix-iYa means " mine ", Taibeyah means basically: " My Tob " or " Our Tob " or " Me ( of ) Tob " or us, " We of Tob ".

Since very few people had any prior knowledge of him, Rambo delighted in creating confusion by introducing himself as Nagib Fazlić Nagon, mine shaft operator who saved up enough money to record an album.

Since the course of a vein of lead was unpredictable, there were many disputes caused by one group of miners following a vein into another mine.

Since the 19th century copper has been mined at Springbok and its surrounding towns, while a large mine extracting copper, lead, zinc and silver is located at Aggeneys, 70 miles ( 113 km ) further inland.

Since the mine closed, £ 10 million has been spent removing the conveyor and its massive concrete tower and cleaning tons of coal waste from the now pristine beach.

Since its construction two secondary shafts have been added bringing the mine to its current depth.

Since coal deposits had been rumored to exist in the area, Mr. Daly proceeded with his lumps of coal to Santa Cruz, announcing to Captain Brannan and three others that he'd discovered a coal mine at Gazos Creek.

Since 1911, the mine has been re-opened several times for smaller scale operations.