Top

A top is a toy designed to be spun rapidly on the ground, the motion of which causes it to remain precisely balanced on its tip because of inertia. Such toys have existed since antiquity. Traditionally tops were constructed of wood, sometimes with an iron tip, and would be set in motion by aid of a string or rope coiled around its axis which, when pulled quickly, caused a rapid unwinding that would set the top in motion. Today they are often built of plastic, and modern materials and manufacturing processes allow tops to be constructed with such precise balance that they can be set in motion by a simple twist of the fingers and twirl of the wrist without need for string or rope.

Characteristics

The motion of a top is produced in the most simple forms by twirling the stem using the fingers. More sophisticated tops are spun by holding the axis firmly while pulling a string or twisting a stick or pushing an auger. In the kinds with an auger, an internal weight rotates, producing an overall circular motion. Some tops can be thrown, while firmly grasping a string that had been tightly wound around the stem, and the centrifugal force generated by the unwinding motion of the string will set them spinning upon touching ground.

Top (mathematics)

In the context of a module M over a ring R, the top of M is the largest semisimple quotient module of M if it exists.

For finite-dimensional k-algebras (k a field), if rad(M) denotes the intersection of all proper maximal submodules of M (the radical of the module), then the top of M is M/rad(M). In the case of local rings with maximal ideal P, the top of M is M/PM. In general if R is a semilocal ring (=semi-artinian ring), that is, if R/Rad(R) is an Artinian ring, where Rad(R) is the Jacobson radical of R, then M/rad(M) is a semisimple module and is the top of M. This includes the cases of local rings and finite dimensional algebras over fields.

See also

References

Top (clothing)

A top is clothing that covers at least the chest, but which usually covers most of the upper human body between the neck and the waistline. The bottom of tops can be as short as mid-torso, or as long as mid-thigh. Men's tops are generally paired with pants, and women's with pants or skirts. Common types of tops are t-shirts, blouses and shirts.

Design

The neckline is the highest line of the top, and may be as high as a head-covering hood, or as low as the waistline or bottom hem of the top. A top may be worn loose or tight around the bust or waist, and may have sleeves or shoulder straps, spaghetti straps (noodle straps), or may be strapless. The back may be covered or bare. Tops may have straps around the waist or neck, or over the shoulders.

Types

Neck styles

See also

References

External links

Athens

Athens (/ˈæθᵻnz/;Modern Greek: Αθήνα, Athína [[aˈθina]], Ancient Greek: Ἀθῆναι Athēnai), is the capital and largest city of Greece. Athens dominates the Attica region and is one of the world's oldest cities, with its recorded history spanning around 3,400 years, and the earliest human presence around the 11th–7th centuries BC.Classical Athens was a powerful city-state that emerged in conjunction with the seagoing development of the port of Piraeus. A centre for the arts, learning and philosophy, home of Plato's Academy and Aristotle's Lyceum, it is widely referred to as the cradle of Western civilization and the birthplace of democracy, largely because of its cultural and political impact on the European continent and in particular the Romans. In modern times, Athens is a large cosmopolitan metropolis and central to economic, financial, industrial, maritime, political and cultural life in Greece. In 2015, Athens was ranked the world's 29th richest city by purchasing power and the 67th most expensive in a UBS study.

Athens, Ontario

Athens (2006 Population 3,086) is a township in Eastern Ontario, Canada. It is located approximately 25 km north of the St. Lawrence River, near Brockville, west of Addison, and about 90 km south west of Ottawa.

Formerly known as Farmersville. Benoni Wiltse, a United Empire Loyalist, and his brothers settled in this area in 1792. Farmersville was renamed to Athens in 1888 by Arza Parish in honour of Athens, Greece, because it was an educational centre with grammar school, a model school for teacher training, and a high school. Currently, it is known for a series of large outdoor murals depicting historical local life, painted on the sides of various buildings.

Each year, a summer fair is held, called "Cornfest". This fair celebrates the harvest of corn and is held on the 3rd Saturday of August annually.

Another celebration that is held each year is called Farmersville Exhibition, and is also known as "Steam Fair." This fair celebrates the agricultural heritage of the town, and includes steam engines and antique tractors. This takes place in July.

OpenAthens

OpenAthens is an identity and access management service, supplied by Eduserv, a not-for-profit information technology services company based in United Kingdom. Solutions for Identity provider(IdP) organisations are: OpenAthens Managed Directory (OpenAthens MD), where individual usernames are held in the cloud, OpenAthens Local Authentication (OpenAthens LA) where individual usernames are held locally, integration with ADFS or LDAP or integration of any third party service supporting SAML where usernames can be held in the cloud, locally or both. OpenAthens SP software for Service Providers supports multiple platforms and federations.

History

With origins in the University of Bath initiative to reduce IT procurement costs for itself and other universities, the Athens project was conceived in 1996. Spun off from Bath University through the vehicle of charitable status, Eduserv was established as a not for profit organisation in 1999.

The service was originally named Athena after the Greek goddess of knowledge and learning. It is rumoured that the name change was partially caused by a common typo, but it was actually due to the name Athena being already trademarked (EU000204735). Launching as 'Athens' in 1997 (UK00002153200), the name has since been changed to 'OpenAthens' in 2007 and renewed as such again in 2015 (EU013713821).