Considerable controversy exists over the proper definition of the term " desertification " for which Helmut Geist ( 2005 ) has identified more than 100 formal definitions.

Considerable enthusiasm has built around robotic surgery ( also known as robotic-assisted surgery ), despite a lack of data suggesting it has significant benefits that justify its cost.

Considerable confusion has existed over the status of this subspecies and G. c. peralta in zoos.

Considerable evidence indicates that about 60, 000 years ago, humans inhabited what has since become the desolate Sahara Desert of northern Niger.

* Verticals: Considerable progress has also been made in developing vertical model-based standards in the healthcare, finance, telecommunications, manufacturing, software-defined radio, space / ground systems communications and some dozen other technology areas.

Considerable work has been done on the weak Goldbach conjecture.

Considerable potential exists for development of a tourist industry, and the government has taken steps to expand facilities in recent years.

Considerable confusion has resulted because diplospory is often defined to involve the megaspore mother cell only, but a number of plant families have a multicellular archesporium and the megagametophyte could originate from another archesporium cell.

Considerable regeneration effort has gone into the area in recent years, with the opening of new hotels and office space under construction.

Considerable improvement and restoration work has been done, to embellish the old quarters and to give them a new look, in which brick reigns supreme.

Considerable recent development has greatly increased the population of this historic town.

Considerable development has taken place in Lorton during the last few years, including on the former prison grounds.

Considerable controversy over use of the generic name has been caused by the Columbia campus claiming de facto ownership, further marginalizing the other three campuses.

Considerable recent research into mudstones has been driven by the recent effort to commercially produce hydrocarbons from them, in both the Shale gas and Tight Oil ( or Light Tight Oil ) plays.

Considerable research has been invested in developing blue OLEDs with high external quantum efficiency as well as a deeper blue color.

Considerable attention has been devoted to his writings and ideas.

Considerable debate and analysis has been conducted regarding the battle location, with the locus of most of these sites spanning Perthshire to north of the River Dee, all in the northeast of Scotland.

Considerable care must be taken in the averaging process ; for example, if a certain region has a large number of tree ring records, a simple average of all the data would strongly over-weight that region.

Considerable debate has centred on how to classify the politics of Winston Peters.

Considerable natural habitat previously existed within the province, although much of these areas has been destroyed during the period 1965 to 1991 during the Cuban intervention years.

Considerable genetic variation has been described among members of this species, even between neighboring populations, and so many experts believe multiple species may be included within T. truncatus.

Considerable residential development has taken place to the west of the town along Marlton Road ( R751 ).

Considerable progress has been made by AIT since 2007 in ensuring that the Midlands Gateway possesses the sophisticated platforms necessary to support innovation-based growth.

" Considerable work has already gone into analyzing Dameo, and some remarkable discoveries have been made in the area of endgame positions with just a few pieces left.

Considerable work has gone into restoring the banks of the river, as in winter it is the direct cause of flooding through the low-lying Hauraki Plains

Considerable attention is devoted to improving language skills and knowledge of primary sources ; the Institute believes that these areas are unjustly neglected by aspiring academics in order to focus on secondary scholarship and critical theory.

Considerable argument broke out as a result, with significant numbers of servicemen disputing the published version, including Admiral Bacon, who wrote his own book about the battle, criticising the version sponsored by Beatty and highly critical of Beatty's own part in the Battle.

Considerable savings had to be made, necessitating significant increases to the relative low taxation in the town.

Considerable effort in supporting conservation of the remnant vegetation is prevalent in Australia-where significant tracts of land are managed as part of the roadside conservation strategies by government agencies

Considerable efforts were undertaken, often by an entire tribe, to recover or regain significant mere that were lost or stolen.

Considerable controversy exists over the effects of ECT on brain tissue, although a number of mental health associations — including the American Psychiatric Association — have concluded that there is no evidence that ECT causes structural brain damage.

Considerable difficulties occurred in preventing illegal encroachments by private persons, and it became necessary to buy a number of them out in 162 BC.

Considerable archaeological evidence exists, including a number of " scroll-style " stamps which date to his reign.

Considerable herds of cattle were reared on the rich pastures of the lower Rhine, but the number of sheep in the province was comparatively small, not greatly in excess of that of the goats.

Considerable ransoms were recorded ; for example, the mercenary Holbracht von Loym had to pay sixty times the number of 150 Prague groschen or more than 30 kilograms of silver.

Considerable time can pass between discovery and publication, for a number of reasons.

Considerable tension exists between these anarchists and anarcho-capitalists.

Considerable disagreement on the values of most of these parameters exists, but the values used by Drake and his colleagues in 1961 were:

Considerable variation in the precise conceptions of these figures exists, as typically occurs in Neopaganism and indeed in pagan religions in general.

Considerable efforts have been made to control the rapid spread of these invasive alien plants.

Considerable confusion exists in the literature of this area because: ( 1 ) many sources do not distinguish between A < sub > G </ sub > and A < sub > 0 </ sub >, but just use the symbol A ( and sometimes the name " Richardson constant ") indiscriminately ; ( 2 ) equations with and without the correction factor here denoted by λ < sub > R </ sub > are both given the same name ; and ( 3 ) a variety of names exist for these equations, including " Richardson equation ", " Dushman's equation ", " Richardson – Dushman equation " and " Richard – Laue – Dushman equation ".

Considerable earthworks are built into St Michaels Hill, and the common belief is that these are the remains of an extensive Motte & Bailey, however a report by the Somerset County Archeologist unit favours their view that these are in fact wine-growing terraces.

Considerable variation in the precise conceptions of these figures exists, as typically occurs in Neopaganism and indeed in pagan religions in general.

Considerable correspondence passed between these leaders and the Department of State, in which the humanitarian attitude of the government and the nature of its intervention are fully disclosed.

Considerable efforts ensured that these were not PCR false positives and supported the existence of a complex community of unexplored species.

Considerable variation both in the type of sausage used and the ingredients of the sauce occurs between these areas.

Considerable research effort continues to be directed toward the purpose and ramifications of alarm-calling behaviour, because, to the extent that this research has the ability to comment on the occurrence or non-occurrence of altruistic behaviour, we can apply these findings to our understanding of altruism in human behaviour.

Considerable weight is added to this story by careful comparison between these blocks and historical photos from the Olympics, such as this distant photo of a race showing the blocks front on, and especially this close-up photo of block four at a similar angle to that shown here ( both historical photos are from the National Library of Australia collection ).

Considerable design work along these lines was carried out.