David Bushnell

David Bushnell (1754–1824), of Westbrook, Connecticut, was an American inventor and a veteran of the Revolutionary War. He is credited with creating the first submarine ever used in combat, while studying at Yale College in 1775. He called it the Turtle because of its look in the water. His idea of using water as ballast for submerging and raising his submarine is still in use, as is the screw propeller, which was used in the Turtle.

While at Yale, Bushnell proved that gunpowder could be exploded under water. He also made the first time bomb. He combined these ideas by building the Turtle which was designed to attack ships by attaching a time bomb to their hulls, while using a hand powered drill and ship auger bit to penetrate the hulls. He used the Turtle in attempts to attack British ships which were blockading New York Harbor in the summer of 1776. His efforts failed every time because the Turtle's boring device was unable to penetrate the copper sheeting lining in the ships' hulls which was designed to protect against parasites in their previous destination, the Caribbean. The Turtle was lost while being transported aboard a sloop; the sloop was discovered, and sank, by British frigates leaving Bloomingdale.

David Bushnell (historian)

David Bushnell (May 14, 1923 – September 3, 2010) was an American academic and Latin American historian who has been called "The Father of the Colombianists." Bushnell, one of the first Americans to study Colombia, was considered one of the world's leading experts on the history of Colombia. He regarded it as one of the least studied countries in Latin America by academic scholars in the United States and Europe, and was considered the first American historian to study and introduce Colombian history as an academic field in the United States.

Early life

Bushnell was born on May 14, 1923 in Philadelphia, Pennsylvania. He obtained a Bachelor of Arts degree from Harvard University. After graduation, Bushnell worked for both the Latin American Division of the Office of Strategic Services and the United States State Department from 1944 to 1946.

From 1956 to 1963, Bushnell worked as a United States Air Force historian based in Washington D.C. and New Mexico. He co-authored Space Biology for the U.S. Air Force, which chronicled high-altitude experiments which experts designed to launch people into outer space during the early years of the space program. He also oversaw the creation of an official written history of NASA and served on the NASA Historical Advisory Committee during this period.

David (commentator)

David (Greek: Δαυΐδ; fl. 6th century) was a Greek scholar and a commentator on Aristotle and Porphyry.

He may have come from Thessaly, but in later times he was confused with an Armenian of the same name (David Anhaght). He was a pupil of Olympiodorus in Alexandria in the late 6th century. His name suggests that he was a Christian.

Three commentaries to Aristotle's works attributed to him have survived: as well as an introduction to philosophy (prolegomena):

All these works will be published, with an English translation, in the series Commentaria in Aristotelem Armeniaca - Davidis Opera (five volumes), edited by Jonathan Barnes andValentina Calzolari.

Another anonymous commentary on Porphyry's Isagoge which was falsely ascribed to Elias (pseudo-Elias), was also falsely ascribed to David.

Notes

Bibliography

David of Bulgaria

David (Bulgarian: Давид) (died 976) was a Bulgarian noble, brother of Emperor Samuel and eldest son of komes Nicholas. After the disastrous invasion of Rus' armies and the fall of North-eastern Bulgaria under Byzantine occupation in 971, he and his three younger brothers took the lead of the defence of the country. They executed their power together and each of them governed and defended a separate region. He ruled the southern-most parts of the realm from Prespa and Kastoria and was responsible for the defence the dangerous borders with Thessalonica and Thessaly. In 976 he participated in the major assault against the Byzantine Empire but was killed by vagrant Vlachs between Prespa and Kostur.

Family tree

Another theory

However, there's also another version about David’s origin. David gains the title "comes" during his service in the Byzantine army which recruited many Armenians from the Eastern region of the empire. The 11th-century historian Stepanos Asoghik wrote that Samuel had one brother, and they were Armenians from the district Derjan. This version is supported by the historians Nicholas Adontz, Jordan Ivanov, and Samuil's Inscription where it’s said that Samuel’s brother is David. Also, the historians Yahya and Al Makin clearly distinguish the race of Samuel and David (the Comitopouli) from the one of Moses and Aaron (the royal race):

David, Chiriquí

David (Spanish pronunciation: [daˈβið]) officially San José de David is a city and corregimiento located in the west of Panama. It is the capital of the province of Chiriquí and has an estimated population of 144,858 inhabitants as confirmed in 2013. It is a relatively affluent city with a firmly established, dominant middle class and a very low unemployment and poverty index. The Pan-American Highway is a popular route to David.

The development of the banking sector, public construction works such as the expansion of the airport and the David-Boquete highway alongside the growth of commercial activity in the city have increased its prominence as one of the fastest growing regions in the country. The city is currently the economic center of the Chiriqui province and produces more than half the gross domestic product of the province, which totals 2.1 billion. It is known for being the third-largest city in the country both in population and by GDP and for being the largest city in Western Panama.