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A hectometre (American spelling: hectometer, symbol hm) is a somewhat uncommonly used unit of length in the metric system, equal to one hundred metres. It derives from the Greek word "ekato", meaning "hundred". A regulation football or soccer field is approximately 1 hectometre in length.

• For area the square hectometre (hm²) is a common unit. It is more commonly known by the name of hectare (ha), meaning 100 ares (100 a). The are is a measurement of area the size of 1 decametre by 1 decametre, which is 10 metres by 10 metres. Hence 100 are equals an area with dimensions 100 m by 100 m — 1 hectometre by 1 hectometre, the square hectometre — equalling 10,000 square metres (10,000 m²).

• For volumes the cubic hectometre (hm³) is also used, 100 m by 100 m by 100 m equalling 1,000,000 cubic metres (1,000,000 m³).

See also[link]

• SI
• SI prefix
• hecto-
• Metric System
• For length: 1 hectometre and Orders of magnitude (length)
• For surface: 1 E+4 m² and Orders of magnitude (area)
• For volume: 1 E+6 m³ and Orders of magnitude (volume)
• Conversion of units, for comparison with other units

The 100: A Ranking of the Most Influential Persons in History is a 1978 book by Michael H. Hart, reprinted in 1992 with revisions. It is a ranking of the 100 people who, according to Hart, most influenced human history.^[1]

The first person on Hart's list is the Prophet of Islam Muhammad.^[2] Hart asserted that Muhammad was "supremely successful" in both the religious and secular realms. He also believed that Muhammad's role in the development of Islam was far more influential than Jesus' collaboration in the development of Christianity. He attributes the development of Christianity to St. Paul, who played a pivotal role in its dissemination."^[3]

The 1992 revisions included the demotion of figures associated with Communism, such as Vladimir Lenin and Mao Zedong, and the introduction of Mikhail Gorbachev. Hart took sides in the Shakespearean authorship issue and substituted Edward de Vere, 17th Earl of Oxford for William Shakespeare. Hart also substituted Niels Bohr and Henri Becquerel with Ernest Rutherford, thus correcting an error in the first edition. Henry Ford was also promoted from the "Honorary Mentions" list, replacing Pablo Picasso. Finally, some of the rankings were re-ordered, although no one listed in the top ten changed position.

Hart wrote another book in 1999, entitled A View from the Year 3000,^[4] voiced in the perspective of a person from that future year and ranking the most influential people in history. Roughly half of those entries are fictional people from 2000–3000, but the remainder are actual people. These were taken mostly from the 1992 edition, with some re-ranking of order.

Hart's Top 10 (from the 1992 edition)[link]

Rank	Name	Time Frame	Image	Occupation	Influence
1	Muhammad	c. 570–632		Secular and religious leader	The central human figure of Islam, regarded by Muslims as a prophet of God and the last messenger. Active as a social reformer, diplomat, merchant, philosopher, orator, legislator, military leader, humanitarian, philanthropist.
2	Isaac Newton	1643–1727		Scientist	English physicist, mathematician, astronomer, natural philosopher, alchemist, and theologian. His law of universal gravitation and three laws of motion laid the groundwork for classical mechanics.
3	Jesus Christ	7–2 BC – 26–36 AD		Spiritual leader	The central figure of Christianity, revered by Christians as the Son of God and the incarnation of God.
4	Buddha	563–483 BC		Spiritual leader	Spiritual teacher and philosopher from ancient India. Founder of Buddhism and is also considered an Gautama Buddha in Hinduism.
5	Confucius	551–479 BC		Philosopher	Chinese thinker and social philosopher, whose teachings and philosophy have deeply influenced Chinese, Korean, Japanese, Vietnamese and Indonesian thought and life. Founded Confucianism, and influenced Neo-Confucianism and New Confucianism.
6	St. Paul	5–67 AD		Christian apostle	One of the most notable of early Christian missionaries, credited with proselytizing and spreading Christianity outside of Palestine (mainly to the Romans) and author of numerous letters of the New Testament of the Bible.
7	Cài Lún	50–121 AD		Political official in imperial China	Widely regarded as the inventor of paper and the papermaking process.
8	Johannes Gutenberg	1398–1468		Inventor	German printer who invented the mechanical printing press.
9	Christopher Columbus	1451–1506	70px	Explorer	Italian navigator, colonizer and explorer whose voyages led to general European awareness of the American continents.
10	Albert Einstein	1879–1955		Scientist	German theoretical physicist, best known for his theory of relativity and specifically mass–energy equivalence, expressed by the equation E = mc2.

See also[link]

• Time 100

References[link]

1. ^ Michael H. Hart The 100: A Ranking of the Most Influential Persons in History. first published in 1978, reprinted with minor revisions 1992. ISBN 978-0-8065-1068-2
2. ^ The 100: A Ranking of the Most Influential Persons in History^{[dead link]}
3. ^ Michael H. Hart, "The 100: A Ranking of the Most Influential Persons in History", Citadel Publishing, 2000, ISBN 978-0-8065-1350-8
4. ^ Michael H. Hart. A view from the year 3000: a ranking of the 100 most influential persons of all time; first published in 1999

External links[link]

• Religious Affiliation of History's 100 Most Influential People

William Trubridge

William Trubridge

William Trubridge (born on 24 May 1980) is a world champion and double world record holding free-diver from New Zealand.^[1]

Trubridge currently holds the world record in the Free Immersion and the Constant Weight without fins disciplines, and is the first human ever to break the 100m barrier unassisted.

World Records:

• 81 m (265.74 ft) Constant Weight without fins, 9 April 2007

• 82 m (269.02 ft) Constant Weight without fins, 11 April 2007

• 84 m (275.59 ft) Constant Weight without fins, 4 April 2008

• 107 m (351.04 ft) Free Immersion, 8 April 2008

• 86 m (282.15 ft) Constant Weight without fins, 10 April 2008

• 108 m (354.33 ft) Free Immersion, 11 April 2008

• 88 m (288.71 ft) Constant Weight without fins, 10 April 2009

• 90 m (295.27 ft) Constant Weight without fins, 3 December 2009

• 92 m (301.83 ft) Constant Weight without fins, 19 April 2009

• 116 m (380.57 ft) Free Immersion, 22 April 2010

• 95 m (311.67 ft) Constant Weight without fins, 26 April 2010

• 96 m (314.96 ft) Constant Weight without fins, 10 December 2010

• 100 m (328.08 ft) Constant Weight without fins, 14 December 2010

• 101 m (331.36 ft) Constant Weight without fins, 16 December 2010

• 121 m (396.98 ft) Free Immersion, 10 April 2011

Though Trubridge's passion lies in the depth disciplines, he accumulated the highest total number of points for an individual at the 2010 Freediving Team's World Championships held in Okinawa, Japan.

On 18 January 2011, Trubridge won the World's Absolute Freediver Award (WAFA) naming him best all around freediver, with the highest combined score in six freediving disciplines: static apnea, dynamic apnea with fins, dynamic apnea without fins (pool disciplines), constant weight apnea with fins, constant weight without fins, and free immersion (depth disciplines).

Trubridge is an Apnea Academy instructor and he currently operates a freediving school and annual competition both called Vertical Blue at Dean's Blue Hole in Long Island, Bahamas from September-May. During the summer he teaches courses in Europe and trains at Tenerife Top Training Center.

Trubridge is also sponsored by Suunto and Orca.

His website is www.verticalblue.net

References[link]

External links[link]

• Vertical Blue Freediving homepage
• Current Freediving World Records
• Deeperblue.net Free-diving forum
• Apnea Academy - A global teaching organisation for underwater apnea - presided over by Umberto Pelizzari
• AIDA New Zealand website