Tropical Storm Zeta

Tropical Storm Zeta was a late-developing tropical storm over the central Atlantic that formed after the 2005 Atlantic hurricane season had officially ended (on November 30) and continued into January 2006. Becoming a tropical depression at approximately midnight on December 30 (UTC), it became the record-breaking thirtieth tropical cyclone of the 2005 Atlantic hurricane season and after intensifying into Tropical Storm Zeta six hours later, it become the season's twenty-seventh named storm. Zeta was one of only two Atlantic tropical cyclones to span two calendar years (the other being Hurricane Alice in 1954–55).

Zeta originated from an area of low pressure on December 29, which previously developed within an upper-level trough. After becoming a tropical storm, the National Hurricane Center continually predicted it would weaken rapidly. Like the previous tropical cyclone, Hurricane Epsilon, Zeta defied these predictions. The storm reached its peak strength on January 2, 2006 before finally dissipating on January 6. As Zeta never approached land there was no impact from the storm other than minor shipping problems. Several ships encountered the storm, and several crews in the 2005 Atlantic Rowing Race were affected by rough seas and high winds.

Zeta (river)

Zeta (Cyrillic: Зета, pronounced [zêta]) is a river in Montenegro. Its source is under the mountain Vojnik, and flows eastwards for 86 km (53 mi) until it confluences into the Morača River just north of Podgorica.

Geography

One theory is that the name "Zeta" derives from an early root meaning "harvest" or "grain" (modern words žetva and žito).

The Zeta River is the most significant tributary of the Morača. The Perućica hydroelectric power plant near Nikšić (307 MW, 970 GWh) uses the waters of the Zeta River to generate power. After that, the river meanders through the Bjelopavlići Valley, until it empties into the Morača a few miles north of Podgorica.

References

Coordinates: 42°27′52″N 19°15′40″E / 42.46444°N 19.26111°E / 42.46444; 19.26111

Zeta (wasp)

Zeta is a small neotropical genus of potter wasps currently containing 4 species. Three of them have restricted distributions: Zeta confusum is found only in Cuba; Zeta abdominalis is spread through several caribbean islands (Jamaica, Hispaniola, Puerto Rico, Virgin Islands and Antigua, with three presently recognized subspecies) and Zeta mendozanum is restricted to the Monte and Patagonia regions of Argentina. Zeta argillaceum, on the other hand, is a very common, widespread and variable species found in the continental Americas from the southern United States (where it was probably introduced) to central Argentina. The wide range of color variation of this species has led to the recognition of a number of subspecies and varieties currently treated as simple synonyms.

References

End

End or Ending may refer to:

End

END

Ending

See also

Conclusion (music)

In music, the conclusion is the ending of a composition and may take the form of a coda or outro.

Pieces using sonata form typically use the recapitulation to conclude a piece, providing closure through the repetition of thematic material from the exposition in the tonic key. In all musical forms other techniques include "altogether unexpected digressions just as a work is drawing to its close, followed by a return...to a consequently more emphatic confirmation of the structural relations implied in the body of the work."

For example:

End (graph theory)

In the mathematics of infinite graphs, an end of a graph represents, intuitively, a direction in which the graph extends to infinity. Ends may be formalized mathematically as equivalence classes of infinite paths, as havens describing strategies for pursuit-evasion games on the graph, or (in the case of locally finite graphs) as topological ends of topological spaces associated with the graph.

Ends of graphs may be used (via Cayley graphs) to define ends of finitely generated groups. Finitely generated infinite groups have one, two, or infinitely many ends, and the Stallings theorem about ends of groups provides a decomposition for groups with more than one end.

Definition and characterization

Ends of graphs were defined by Rudolf Halin (1964) in terms of equivalence classes of infinite paths. A ray in an infinite graph is a semi-infinite simple path; that is, it is an infinite sequence of vertices v₀, v₁, v₂, ... in which each vertex appears at most once in the sequence and each two consecutive vertices in the sequence are the two endpoints of an edge in the graph. According to Halin's definition, two rays r₀ and r₁ are equivalent if there is another ray r₂ (not necessarily different from either of the first two rays) that contains infinitely many of the vertices in each of r₀ and r₁. This is an equivalence relation: each ray is equivalent to itself, the definition is symmetric with regard to the ordering of the two rays, and it can be shown to be transitive. Therefore, it partitions the set of all rays into equivalence classes, and Halin defined an end as one of these equivalence classes.