An ango (安居), or kessei (結制), is a Japanese term for a three-month period of intense training for students of Zen Buddhism, lasting anywhere from 90 to 100 days. The practice during ango consists of meditation (zazen), study, and work (samu(作務)).
Ango is typically held twice a year, the first period from spring to summer and the second period from fall to winter. The word ango literally translates as "dwelling in peace"; the summer ango is referred to as ge-ango and the winter period is u-ango. Additionally, some monasteries and Zen centers hold just one ango per year.
Concerning Zen practice in the United States, author Ellen Birx writes,
Mons Vinogradov is a rugged massif that is located on the lunar mare where Oceanus Procellarum to the southwest joins Mare Imbrium to the east. There are three primary peaks in this formation, which rise to altitudes of 1.0–1.4 km above the surface. To the east of this rise is the crater Euler, and to the southeast is an area of rugged ground that reaches the Montes Carpatus range. The Carpatus mountain range forms the southwest boundary of the Mare Imbrium.
The selenographic coordinate of Mons Vinogradov is 22.4 N, 32.4 W, and it has a maximum diameter of 25 km at the base. It was named after Aleksandr P. Vinogradov. This mountain was formerly named Euler Beta (β), or Mons Euler.
In the rugged ground just to the southeast of this mountain is a set of tiny craters that have been assigned names by the IAU. These are listed in the table below.
The angon (Medieval Greek ἄγγων, Old High German ango, Old English anga "hook, point, spike") was a type of javelin used during the Early Middle Ages by the Franks and other Germanic peoples, including the Anglo-Saxons. It was similar to, and probably derived from, the pilum used by the Roman army and had a barbed head and long narrow socket or shank made of iron mounted on a wooden haft.
It was rare on the battlefield, despite the claim by Agathias, being found mostly in the grave goods of the wealthy. The Fragmentary Chronicle of Saragossa credits an ango with killing King Amalaric of the Visigoths. By the 7th century, it had ceased to be used.
They are found in abundance in the war-graves in Illerup-Ådal, Denmark. They are also quite common in Norwegian graves from the migration era.
Evidence for the length of insular Anglo-Saxon spears is limited, but based on grave finds it has been estimated that they ranged in length from 1.6 to 2.8 m (5 ft 3 in to 9 ft 2 in), compared to continental examples found at Nydam Mose in Denmark which range from 2.3 to 3 m (7 ft 7 in to 9 ft 10 in) long. Although shorter and lighter spears with smaller heads were generally preferred for use as javelins, an exception was the barbed angon, one of which was found at Abingdon with a head measuring 52.5 cm (20.7 in). The barbs were designed to lodge in an opponent's shield (or body) so that it could not be removed and the long iron shank prevented the head from being cut from the shaft. The Angon was likely designed for the purpose of disabling enemy shields, thus leaving combatants vulnerable, and disrupting enemy formations. The shaft may sometimes have been decorated or painted, and iron or bronze rings were sometimes fitted onto it which may have marked the center of balance and thus the best place to hold the weapon.