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A county is a geographic region of a country used for administrative or other purposes in some modern nations. The term is derived from the Old French comté denoting a jurisdiction under the sovereignty of a count (earl) or a viscount. Literal equivalents in other languages, derived from the equivalent of "count", are now seldom used officially, including comté, contea, contado, comtat, condado, Grafschaft, graafschap, and zhupa in Slavic languages; terms equivalent to 'commune' or 'community' are now often instead used. When the Normans conquered England, they brought the term with them. The Saxons had already established the districts that became the historic counties of England, calling them shires; many county names derive from the name of the county town (county seat) with the word shire added on: for example, Gloucestershire and Worcestershire. The Anglo-Saxon terms earl and earldom were taken as equivalent to the continental terms "count" and "county" under the conquering Normans, and over time the two blended and became equivalent. Further, the later-imported term became a synonym for the native Old English word sċīr (ʃiːr) or, in Modern English, shire – an equivalent administrative division of the kingdom. The term "county" evolved, consequently, to designate a level of local administration that was immediately beneath a national government, within a unitary (non-federal) system of government. County later also became used differently in some federal systems of government, for a local administrative division subordinate to a primary subnational entity, such as a Province (e.g. Canada) or a level 3 territorial unit such as NUTS 3. In the United States and Canada, founded 600 years later on the British traditions, counties are usually an administrative division set by convenient geographical demarcations, which in governance have certain officeholders (for example sheriffs and their departments) as a part of the state's and province's mechanisms, including geographically common court systems.

Energy flows monitoring at the Cantonal level

Massimiliano Capezzali, Mélanie Guittet

As an increased number of measures (Swiss or European level) aim at developing more sustainable policies for energy management and reduction of CO2 emissions in particular (for example, the 3x20 policy), very few tools currently exist at the regional/canto ...

LESO-PB, EPFL2015