the-french-artist/wikipedia_20220301.simple_sentence_split huggingface dataset:
The cost of removing the piston is such that it makes no economic sense to re-install the old cylinder; therefore it is necessary to replace the cylinder and install a new piston.
Another solution to protect against a cylinder blowout is to install a "life jacket."
This is a device which, in the event of an excessive downward speed, clamps onto the cylinder and stops the car.
This device is also known as a Rupture Valve in some parts of the world.
In addition to the safety concerns for older hydraulic elevators, there is risk of leaking hydraulic oil into the aquifer and causing potential environmental contamination.
This has led to the introduction of PVC liners (casings) around hydraulic cylinders which can be monitored for integrity.
In the past decade, recent innovations in inverted hydraulic jacks have eliminated the costly process of drilling the ground to install a borehole jack.
This also eliminates the threat of corrosion to the system and increases safety.
Types of hoist mechanisms
Traction elevators
Geared and gearless traction elevators
Geared traction machines are driven by AC or DC electric motors.
Geared machines use worm gears to control mechanical movement of elevator cars by "rolling" steel hoist ropes over a drive sheave which is attached to a gearbox driven by a high speed motor.
These machines are generally the best option for basement or overhead traction use for speeds up to 500 ft/min (2.5 m/s).
Gearless traction machines are low speed (low RPM), high torque electric motors powered either by AC or DC.
In this case, the drive sheave is directly attached to the end of the motor.
Gearless traction elevators can reach speeds of up to 2,000 ft/min (10 m/s), or even higher.
A brake is mounted between the motor and drive sheave (or gearbox) to hold the elevator stationary at a floor.
In each case, cables are attached to a hitch plate on top of the cab or may be "underslung" below a cab, and then looped over the drive sheave to a counterweight attached to the opposite end of the cables which reduces the amount of power needed to move the cab.
The counterweight is located in the hoist-way and rides a separate rail system; as the car goes up, the counterweight goes down, and vice versa.
This action is powered by the traction machine which is directed by the controller, typically a relay logic or computerized device that directs starting, acceleration, deceleration and stopping of the elevator cab.
The grooves in the drive sheave are specially designed to prevent the cables from slipping. "
Traction" is provided to the ropes by the grip of the grooves in the sheave, thereby the name.
As the ropes age and the traction grooves wear, some traction is lost and the ropes must be replaced and the sheave repaired or replaced.
Elevators with more than 100' (30 m) of travel have a system called compensation.
This is a separate set of cables or a chain attached to the bottom of the counterweight and the bottom of the elevator cab.
This makes it easier to control the elevator, as it compensates for the differing weight of cable between the hoist and the cab.
If the compensation system uses chains, the chain is guided by a bar mounted between the counterweight rails.
Conventional hydraulic elevators.
They use an underground cylinder, are quite common for low level buildings with 2-7 floors, and have speeds of up to 200 feet/minute (1 meter/second).
Holeless hydraulic elevators were developed in the 1970s, and use a pair of above ground cylinders, which makes it practical for environmentally or cost sensitive buildings with 2, 3, or 4 floors.
Roped hydraulic elevators use both above ground cylinders and a rope system, which combines the versatility of inground hydraulic with the reliability of holeless hydraulic, even though they can serve up to 8-10 floors.
Climbing elevator
The propulsion can be done by an electric or a combustion engine.
Climbing elevators are used in guyed masts or towers, in order to make easy access to parts of these constructions, such as flight safety lamps for maintenance.
An example would be the Moonlight Towers in Austin, Texas, where the elevator holds only one person and equipment for maintenance.
Emergency power operation (EPR)
When power is lost in a traction elevator system, all elevators will initially come to a halt.
One by one, each car in the group will return to the lobby floor, open its doors and shut down.
People in the remaining elevators may see an indicator light or hear a voice announcement informing them that the elevator will return to the lobby shortly.
Once all cars have successfully returned, the system will then automatically select one or more cars to be used for normal operations and these cars will return to service.
The car(s) selected to run under emergency power can be manually overridden by a key or strip switch in the lobby.
In order to help prevent entrapment, when the system detects that it is running low on power, it will bring the running cars to the lobby or nearest floor, open the doors and shut down.
The doors then close after an adjustable time period and the car remains unusable until reset, usually by cycling the elevator main power switch.
Typically, due to the high current draw when starting the pump motor, hydraulic elevators are not run using standard emergency power systems.
However, the increasing use of current limiting motor starters, commonly known as "Soft-Start" contactors, avoid much of this problem and the current draw of the pump motor is less of a limiting concern.
Elevator convenience features
Elevators may feature talking devices as an accessibility aid for the blind.
In addition to floor arrival notifications, the computer announces the direction of travel, and notifies the passengers before the doors are to close.
In addition to the call buttons, elevators usually have floor indicators (often illuminated by LED) and direction lanterns.
The former are almost universal in cab interiors with more than two stops and may be found outside the elevators as well on one or more of the floors.
Floor indicators can consist of a dial with a rotating needle, but the most common types are those with successively illuminated floor indications or LCDs.
Likewise, a change of floors or an arrival at a floor is indicated by a sound, depending on the elevator.
Direction lanterns are also found both inside and outside elevator cars, but they should always be visible from outside because their primary purpose is to help people decide whether or not to get on the elevator.
If somebody waiting for the elevator wants to go up, but a car comes first that indicates that it is going down, then the person may decide not to get on the elevator.
If the person waits, then one will still stop going up.
Direction indicators are sometimes etched with arrows or shaped like arrows and/or use the convention that one that lights up red means "down" and green means "up".
Since the color convention is often undermined or overrided by systems that do not invoke it, it is usually used only in conjunction with other differentiating factors.
An example of a place whose elevators use only the color convention to differentiate between directions is the Museum of Contemporary Art in Chicago, where a single circle can be made to light up green for "up" and red for "down."
Sometimes directions must be inferred by the position of the indicators relative to one another.
In addition to lanterns, most elevators have a chime to indicate if the elevator is going up or down either before or after the doors open, usually in conjunction with the lanterns lighting up.
Universally, one chime is for up, two is for down, and none indicates an elevator that is 'free'.
The mechanical and electrical design of elevators is dictated according to various standards (aka elevator codes), which may be international, national, state, regional or city based.
Whereas once many standards were prescriptive, specifying exact criteria which must be complied with, there has recently been a shift towards more performance-based standards where the onus falls on the designer to ensure that the elevator meets or exceeds the standard..
Australia – AS1735
Canada – CAN/CSA B44
Europe – EN 81 series (EN 81-1, EN 81-2, EN 81-28, EN 81-70, EN 12015, EN 12016, EN 13015, etc.)
USA – ASME A17
Stephen William Bragg (born 20 December 1957), known as Billy Bragg, is an English singer and guitarist.
He was born in Barking, Essex.
He is famous for his mix of folk, punk, and protest music.
British folk musicians
British socialists
Singers from Essex
Brixton riot (1981) - April 11, 1981
Brixton riot (1985) - September 28, 1985
Brixton riot (1995) - December 13, 1995
Budweiser is a popular American beer made by the Anheuser-Busch company.
It is made with hops, barley, and rice.
It is known as the "King of Beers".
It is brewed in St. Louis and other cities around the United States.
There are several different types of Budweiser beer, such as Bud Light.
The name is similar to a Czech beer of the same name, Budweiser Budvar.
They are currently the official beer sponsor of Fantasy Premier League.
Budweiser's Official website
Shi'a Islam (, ) is the second largest branch of Islam.
Shia Muslims believe that Prophet Muhammad under the command of God chose Ali as Caliph (or Successor) and publicly declared it during his last sermon after Hajj at Ghadir Khumm.
Shi'a Muslims believe in the teachings of the Qu'ran and the Prophet Muhammad's family, whom they call the Ahl al-Bayt.
The Shias think that the first three ruling Sunni Caliphs had no importance to the development of the faith.
The singular/adjective form is Shī'ī  () and means a follower.
Shi'a Islam, like Sunni Islam, has at times been divided into many branches, however only three of these have a significant number of followers nowadays.
The best known and the one with most adherents is Twelvers (Ithnā 'ashariyya), followed by the Ismaili and Zaidiyyah.
Shia Code, the Shia Islamic Guide
List of Shi'a websites
Ahlul Bayt Digital Islamic Library Project
Al-Shia Website
Brixton before the riots
Brixton in south London was a very poor inner-city area with many problems — high unemployment, much crime, bad housing.
Many black people, mostly of Caribbean origin, lived there.
Many people there disliked the police.
The evening of April 10
The riot was unplanned.
On the evening of the 10th, at around 5.15pm, a black boy with a knife wound was stopped by police.
As he was brought to a police car by two policemen along Railton Road a large crowd attacked the police and the fight only ended when more policemen arrived; the youth was taken to hospital.
The night of April 10 and 11
Through the night of the 10th and on the 11th the police brought many officers into the area.
Throughout the day crowds slowly got together.
In early evening, as the police tried to make some arrests on Atlantic Road, the riots started: a few bricks were thrown and windows smashed.
More police came and more things were thrown.
The police retreated, leaving their cars to be burned.
Other cars were burned and things were stolen from shops on Railton Road, Mayall Road, Leeson Road and Brixton Road before the police came back.
The police closed the Atlantic-Railton-Mayall area to the public, although many other streets had groups of rioting people as well.
The rioters started throwing with bricks, bottles, and Molotov cocktails.
Cars and buildings were burned and fire engines attacked as they tried to stop the flames.
The riot was at its peak at around 8pm, with two public houses, schools and other buildings burning.
Two hours later the police had the area under some control, although the fire brigade returned at the next morning only.
By 1am the area was largely under control, with no large crowds – except the police – on the streets.
There were tries to start violence again on the 12th, but they were stopped by more than 1,000 police on the streets.
After the riots
The riot was followed by almost 300 police injuries and 65 bad civilian injuries; over 100 cars were burned, including 56 police cars; almost 150 buildings were damaged, with thirty burned.
There were 82 arrests.
Between 3 and 11 July of that year, there were more riots in England.
There were riots in Handsworth, Southall, Toxteth, and Moss Side.
There were also smaller pockets of unrest in Leeds, Leicester, Southampton, Halifax, Bedford, Gloucester, Coventry, Bristol, and Edinburgh.
Brixton riots in the media
The Clash also made a song about Brixton, "The Guns of Brixton."
This song came out before the riots of 1981 (The album was sold first in 1979), but it describes the general atmosphere in the area.
1981 crimes
1981 in the United Kingdom
1980s crimes in the United Kingdom
1980s fires
1980s riots
Attacks on buildings and structures in London
Attacks on buildings and structures in the 1980s
Riots in England
1980s disasters in the United Kingdom
Caudipteryx was a small feathered dinosaur.
It was related to Oviraptor but looked more like Archaeopteryx.
It was a relative of Protarchaeopteryx.
It was found in China.
It was a small insectivore, with long thin legs, less than a metre long.
It had a fan of tail feathers and a fringe of feathers along the trailing edge of each arm.
They are very like bird feathers, with a central stalk, and vanes on either side.
Its arms were too short for it to fly.
Protarchaeopteryx was a small feathered dinosaur from China.
It was a bird-like predator with teeth.
It looked like Archaeopteryx.
It is one of the Chinese feathered dinosaurs.
Pentaceratops was a very large ceratopsian dinosaur.
It was almost 11 meters in length and 4 meters tall.
It was larger than Triceratops.
Greenwich Mean Time (GMT) is an internationally standardized time format.
It is the main time zone in several countries, including the United Kingdom and Portugal.
GMT has the same time as UTC, but there are differences between the two.
Technically, GMT is a time zone, while UTC is a time standard.
GMT was established in 1884 at the International Meridian Conference, which met to establish a standardized system for measuring world longitude.
They decided that the meridian passing through the Royal Observatory in Greenwich, England would be 0° longitude.
This conference also decided that the time zone around the meridian, GMT, would be the time zone used for reference around the world.
Other countries would define their time based on GMT.
UTC was defined in 1963 as the new world reference for time.
The major advantage of the new standard was that its time was determined by highly accurate atomic clocks, not the sun at Greenwich.
Other advantages of UTC are that calling the new standard Coordinated Universal Time avoids giving more importance to any one country, and that UTC does not adjust for Daylight Saving Time, which means the world always has a standard time.
In mathematics, the reciprocal (or multiplicative inverse) of a number is 1 divided by the number, or equivalently, the number raised to the power of -1 (as in  and ).
All numbers have a reciprocal except zero, since no number times 0 is 1.
Two numbers are reciprocal of each other if and only if their product is 1.
2.5 and 0.4 are reciprocals, because 2.5 × 0.4 = 1.
-0.2 and -5 are reciprocals, because -0.2 × -5 = 1.
1 and -1 are their own reciprocals, because 1 × 1 = 1 and -1 × -1 = 1.
To find the reciprocal of a fraction, swap the numerator and the denominator.
Whole numbers can be thought as having a denominator of 1.
The reciprocal of 8 is 1/8 (or 0.125).
The reciprocal of 5/3 is 3/5 (or 0.6).
The reciprocal of 1/7 is 7.
The reciprocal of -9/4 is -4/9.
Additive inverse
Launches
Gunter's Space Page - Chronology of Space Launches
JAXA
Jonathan's Space Report (SatCat.txt and Launchlog.txt)
Orbital Report News Agency's Launch Logs
SpaceFlightNow
Steven Pietrobon's Space Archive
The British Museum in London is one of the world's largest and most important museums of human history and culture.
It has more than seven million objects from all continents.
They illustrate and document the story of human culture from its beginning to the present.
As with all other national museums and art galleries in Britain, the Museum charges no admission fee.
The British Museum set up in 1753 and opened in 1759.
It was the first museum in the world to be open to everyone.
The museum gradually grew over the next two hundred years.
It has nearly six million visitors a year and is the third most popular art museum in the world.
The history of the British Museum began with the Irish born British physicist Hans Sloane, who died aged 93 in 1753.
During his life, he had collected many important things from all around the world.
When he died, he did not want his collection to be split up between his relatives.
He sold his collection to the parliament of King George II.
The parliament set up the British Museum to hold the collection.
By the time he died, Sloane had collected over 80,000 objects from all over the world including Egypt, Greece, Rome and the Americas.
The collection was mostly books and manuscripts.
There were many important archaeological pieces included as well.
The government looked at many possible places to build the new museum, including Buckingham House, which later became Buckingham Palace.
Eventually a building called Montagu House was chosen.
The Museum opened on 15 January 1759, although all visitors had to be shown around by stewards.
Over the years the museum began to concentrate more and more on historical objects and sculptures.
For this reason they were given the Rosetta Stone by King George III in 1802.
The Rosetta Stone had previously been important to French historians trying understand the Hieroglyph language written by the Ancient Egyptians.
In 1816 the Museum acquired the Elgin Marbles from Thomas Bruce, 7th Earl of Elgin.
Elgin had taken them from the Parthenon in Athens, Greece several years earlier.
Many people disagreed with the way Elgin took them from Greece.
They compared his acts to looting and vandalism.
People still argue about this issue today.
In 1822 King George III donated the entire Royal Library to the museum.
This contained over 65,000 books and pamphlets.
In 1823 the original building was demolished and work began on new buildings to hold the ever growing collection.
Some of the space was freed up when the National Gallery opened in 1824, as many of the Museum's paintings and drawings were moved there.
New building and expansion
The Museums collection continued to get bigger over the following years, and more and more buildings were added to hold the new objects.
Important discoveries by people working for the British Museum included the Mausoleum of Halicarnassus by Charles Newton in 1857 and the Temple of Artemis in 1869.
Many things found at these sites were taken to the Museum, where they have remained ever since.
In 1852 the British Museum's famous round Reading Room was opened.
It had enough space to display a million books at once.
The collection continued to get bigger and bigger.
Eventually the Natural History Museum was set up in 1887 to hold the natural parts of the Museum's collection.
It was around this time that electric lights were first put in the Museum.
It was one of the first public places in England to do so.
In the early 1900s the Museum's board of directors bought all the houses surrounding it, knocked them all down and built over them.
In 1939, just before the start of World War II, most of the Museum's exhibits were taken to other places because the directors were worried the Nazis might bomb the Museum during the Blitz.
The exhibits were stored in old London Underground stations, as well as other places.
The evacuation proved to be a good idea, as parts of the Museum were destroyed by bombs in 1940.
Into the modern day
Much of the 1950s was spent fixing the parts of the Museum destroyed by the bombing, and bringing back the pieces that had been taken away.
During all this time the collection continued to get bigger, although space was slowly running out for all the books being brought in.
The British Library was set up in 1973 to deal with this problem.
In 1972 the Museum was loaned the Tutankhamun collection from the Museum of Cairo.
They held a big exhibition called 'The Treasures of Tutankhamun' and it attracted over 1.5 million people to come and see it.
In 1998 the central courtyard, which had been unused before, was turned into the Great Court with the Reading Room at its centre.
The Great Court has over 2 acres of space under its roof.
This makes it the largest covered public space in Europe.
It was opened by Queen Elizabeth II in January 2000.
Since then the Museum has collected more things to do with history, rather than more modern pieces.
They now have a large collection of Roman British, Ancient Greek and Ancient Egyptian artefacts, as well as objects from many other cultures and times around the world.
Because of its extremely large size the Museum's collection is split into many parts, called departments.
The departments have changed many times over the years.
They are sometimes merged together, split into smaller departments or renamed and changed altogether.
Department of Ancient Egypt and Sudan
The British Museums department of Ancient Egypt and Sudan is one of the biggest collections of Ancient Egyptian art in the world.
Only the Egyptian Museum in Cairo has a bigger collection.
They cover Egyptian and Sudanese history from around 10000 BC all the way to the 12th century AD, a period of around 12,000 years.
Around 150 of the objects in the Egyptian department were part of the first collection which was given to the Museum by Hans Sloane in 1753.
In 1801 the British defeated the French, led by Napoleon Bonaparte, at the battle of the Nile.
After the battle, British forces took lots of Ancient Egyptian artifacts from the defeated French.
They were given to the British Museum in 1803.
These objects included the famous Rosetta Stone.
The department continued to get bigger, paying for archaeologists to go to Egypt and Sudan.
They did this until 2001 when the Egyptian government made it much harder for Museums to take historical artefacts back to their own country.
The collection now has over 110,000 exhibits.
Department of Greece and Rome
The British Museum's department of Greece and Rome is one of the biggest collections of Ancient Greek and Roman objects in the world.
The objects come from nearly 4000 years of European history, from 3200 BC all the way to the 4th century AD.
It contains parts of two of the Seven Wonders of the Ancient World; the Mausoleum at Halikarnassos and the Temple of Artemis at Ephesos.
It also had many pieces taken from the Parthenon in Athens, Greece.
Like the rest of the Museum the department gets most of its collection from excavations or the acquiring of private collections.
Some of the earliest objects in the collection were bought from the collection of Sir William Hamilton in 1772.
In recent years the Museum's rules on how it can get objects have become much stricter.
Other countries rules on allowing Museums to take objects away have also got stricter.
This has meant the British Museum has gradually taken fewer items each year in recent times.
Department of the Middle East
The British Museum Department of the Middle East has the largest collection of Mesopotamian art in the world, outside Iraq.
It has some 300,000 objects, covering the Neolithic period until present.
It has objects from all over the Middle East including Mesopotamia (Iraq), Anatolia (Turkey), Levant (Syria, Lebanon and Jordan) and some pieces from central Asia.
The Assyrian and Sumerian collections are also some of the biggest in the world.
The Cyrus Cylinder, a cylindrical scroll from 539 BC.
Written on it is the story of Cyrus, king of Babylon.
He gave rights back to the people of Assyria after the previous king enslaved them and burned their temples.
Several ten feet tall statues of lions and bulls with human heads.
The fifteen foot high bronze gates of the fortress of Galawat.
Official website of The British Museum
A list of important dates in the British museum's history from the official website
National museums
Dexter is an American television series that was shown on Showtime network.
It is based on the book Darkly Dreaming Dexter written by Jeff Lindsay.
The show tells a story about a serial killer, Dexter Morgan, who works as a forensics analyst for the police in Miami.
The main actor of the show is Michael C. Hall.
Dexter  French website
Dexter at the EPisodeWorld
Police television series
Python is an open source programming language.
It  was made to be easy-to-read and powerful.
A Dutch programmer named Guido van Rossum made Python in 1991.
He named it after the television program Monty Python's Flying Circus.
Many Python examples and tutorials include jokes from the show.
Python is an interpreted language.
Interpreted languages do not need to be compiled to run.
A program called an interpreter runs Python code on almost any kind of computer.
This means that a programmer can change the code and quickly see the results.
This also means Python is slower than a compiled language like C, because it is not running machine code directly.
Python is a good programming language for beginners.
It is a high-level language, which means a programmer can focus on what to do instead of how to do it.
Writing programs in Python takes less time than in some other languages.
Python's developers try to avoid changing the language to make it better until they have a lot of things to change.
Also, they try not to make small repairs, called patches, to unimportant parts of the CPython reference implementation that would make it faster.
When speed is important, a Python programmer can move some of the work of the program to other parts written in programming languages like C or PyPy, a just-in-time compiler.
It translates a Python script into C and makes direct C-level API calls into the Python interpreter.
Keeping Python fun to use is an important goal of Python’s developers.
It reflects in the language's name, a tribute to the British comedy group Monty Python.
On occasions, there are playful approaches to tutorials and reference materials, such as referring to spam and eggs instead of the standard foo and bar.
Python use
Python is used by hundreds of thousands of programmers and is used in many places.
Sometimes only Python code is used for a program, but most of the time it is used to do simple jobs while another programming language is used to do more complicated tasks.
Its standard library is made up of many functions that come with Python when it is installed.
On the Internet there are many other libraries available that make it possible for the Python language to do more things.
These libraries make it a powerful language; it can do many different things.
Scientific programming
Desktop GUIs applications
Game programming.
Complex algorithms creation
Machine learning and artificial intelligence
Audio and video applications
Python has a very easy-to-read syntax.
Some of Python's syntax comes from C, because that is the language that Python was written in.
But Python uses whitespace to delimit code: spaces or tabs are used to organize code into groups.
This is different from C.  In C, there is a semicolon at the end of each line and curly braces ({}) are used to group code.
Using whitespace to delimit code makes Python a very easy-to-read language.
Statements and control flow
The assignment statement, or the = sign.
In Python, the statement x = 2 means that the name x is bound to the integer 2.
Names can be rebound to many different types in Python, which is why  Python is a dynamically typed language.
For example, you could now type the statement x = 'spam' and it would work, but it wouldn't in another language like C or C++.
The if statement, which runs a block of code if certain conditions are met, along with else and elif (a contraction of else if from other programming languages).
The elif statement runs a block of code if the previous conditions are not met, but the conditions for the elif statement are met.
The else statement runs a block of code if none of the previous conditions are met.
The for statement, which iterates over an iterable object such as a list and binds each element of that object to a variable to use in that block of code, which creates a for loop.
The while statement, which runs a block of code as long as certain conditions are met, which creates a while loop.
The def statement, which defines a function or method.
The pass statement, which means "do nothing."
The class statement, which allows the user to create their own type of objects like what integers and strings are.
The import statement, which imports Python files for use in the user's code.
The print statement, which outputs various things to the console.
Addition, subtraction, multiplication, and division, represented by +, -. *,
and /.
Exponents, represented by **.
To compare two values, Python uses ==.
Python uses the words "and", "or", and "not" for its boolean expressions.
This is a small example of a Python program.
# This code does the same thing, only it is longer:
Python also does something called "dynamic variable assignment".
This means that when a number or word is made in a program, the user does not have to say what type it is.
This makes it easier to reuse variable names, making fast changes simpler.
An example of this is shown below.
This code will make both a number and a word, and show them both, using only one variable.
In a "statically typed" language like C, a programmer would have to say whether x was a number or a word before C would let the programmer set up x, and after that, C would not allow its type to change from a number to a word.
Python kya hai
Back to the Future is a 1985 American science fiction adventure movie directed by Robert Zemeckis and written by Bob Gale.
It stars Michael J. Fox, Christopher Lloyd and Crispin Glover.
It is the first movie for the Back to the Future trilogy.
In 1985, Doc Emmett Brown shows teenage Marty his new creation: a car which can travel through time.
The heart of the time machine is  "the flux capacitor," invented by Dr. Brown.
The time machine needs plutonium to provide the power for the flux capacitor.
Marty uses the car to escape from Libyan terrorists and accidentally goes back to the year 1955.
Marty seeks out and meets Dr. Brown in 1955.
The time machine is out of plutonium, and there is no plutonium available for the time machine in 1955.
By chance, Marty knows the time and place of a one-time natural event (lightning strike) that can provide the power to transport the time machine and Marty back to 1985.
The situation in 1955 is complicated when Marty meets his own parents as teenagers.
When he helps his father, he accidentally changes the events that lead to his parents becoming a couple.
Marty's teenage mother becomes interested in Marty instead of Marty's father, George.
With the help of the Doc of 1955, Marty tries to undo the damage he has done, and make his mother fall in love with his father.
If he can get his parents back together, he has very little time to get back to the car to use the lightning strike to take the time machine and him (Marty) back to the future (i.e. 1985).
Michael J. Fox as Marty McFly
Christopher Lloyd as Dr. Emmett "Doc" Brown
Lea Thompson as Lorraine Baines-McFly
Crispin Glover as George McFly
Thomas F. Wilson as Biff Tannen
Claudia Wells as Jennifer Parker
James Tolkan as Mr. Strickland
Marc McClure as Dave McFly
Wendie Jo Sperber as Linda McFly
1985 comedy movies
1980s science fiction movies
1980s teen comedy movies
Back to the Future movies
Movies about time travel
Stargate (movie), a 1994 science fiction movie directed by Roland Emmerich
Stargate SG-1, a science fiction television series based on the film
Stargate Atlantis, a spin off of Stargate SG-1
Stargate: The Ark of Truth, a 2008 science fiction film
Stargate: Continuum, a 2008 science fiction film
Stargate Universe, a spin off of Stargate SG-1
Schopenhauer believed that the primary characteristic, or essence of all things - including human beings - is not intelligence, rationality or spirit, but will.
By "will" he means a wanting and craving like that which we know in ourselves as our "will."
It is the source of immense amounts of suffering in the world.
He also believed that a "better consciousness" could be attained by denying the fulfilment of our desires, taking time to think about who we really are and what we should do to avoid suffering - but also, in doing something few philosophers of his day spoke of: in making and looking at works of art, especially music, which he considered a way to escape from the world's pain and suffering.
"Every man takes the limits of his vision for the limits of the world."
"In general admittedly the Wise of all times have always said the same thing, and the fools, that is to say the vast majority of all times, have always done the opposite; and so it will remain in the future."
"To marry is to halve your rights and double your duties."
"The two foes of human happiness are pain and boredom."
"Talent hits a target no-one else can hit; genius hits targets no-one else can see."
1860 deaths
The 2005 Cronulla riots were a series of violent events between Lebanese and white Australian mobs.
Riots started in and around Cronulla, a suburb on the beach in Sydney, Australia's biggest city.
The violence was soon also in other suburbs around Sydney.
The riots happened on 11, 12 and 14 December.
Many people committed crimes there.
2005 crimes
2000s in Sydney
2000s riots
Crime in Australia
The 1992 Los Angeles riots, also called Rodney King uprising or Rodney King riots, started on April 29, 1992 when a jury set four white policemen free.
The jury was mostly Caucasian.
The policemen had beaten up African-American motorist Rodney King badly and filmed this, after he fled from police.
Thousands of people in Los Angeles, mostly African American and Hispanic, rioted.
In all, 55 people were killed in the riots.
1992 in the United States
1990s crimes in California
1992 riots
1990s riots
Mass murder in California
Mass murder in the United States
Police misconduct in the United States
Riots in the United States
The hypotenuse is the side opposite the 90 degrees angle in a right triangle.
It is always the longest side.
In this triangle, if angle C is 90 degrees, then the opposite side, "c", is the hypotenuse.
The hypotenuse is important in trigonometry, where it is used to calculate many functions.
The length of the hypotenuse can be calculated if the other two sides are known, using Pythagoras' Theorem.
In fact, the length of any side of a right triangle can be calculated if the other two sides are known, using this theorem.
In Norse Mythology, the Niðavellir are dark fields, mentioned in the Völuspa.
The dwarves live there.
Python is the name given to a genus of constricting snakes.
Such snakes are not venomous.
its family is the Pythonidae.
Boulenger (1890) thought this group was a subfamily (Pythoninae) of the family Boidae (boas).
However, boas produce live young, while pythons are oviparous: they lay eggs.
Python can be found in Southeast Asia and Africa, and other members of the family are found in New Guinea and Australia.
Pythons can range from 3 feet long in species like ball pythons to 29 feet in species like reticulated pythons.
Python is one of eight genera in the family.
They all have a rather similar life style.
Most members of the family are ambush predators: they stay motionless in a camouflaged position, and then strike suddenly at passing prey.
They wrap their body round the prey and squeeze.
To kill its prey, the python squeezes it to death, then swallows it whole.
Larger pythons can prey on animals as large as a full-grown deer.
In Africa, there are pythons that eat gazelles.
Most of their prey is much smaller than that.
Pythons may take several days or even weeks to fully digest prey.
Python can be up to 900 cm long and weigh up to 90 kg, but males are much smaller and lighter than females.
The python can live up to 30 years.
The breeding time is between 60 or 70 days.
Pythons in unusual places
Burmese pythons have become an invasive species in south Florida.
The problem is most serious in the  Everglades National Park.
In 2014 a pet python killed two children in New Brunswick, Canada.
The word consult generally means to talk about something, consider all the facts, and make a decision.
To Bahá'ís, consultation also means:
everyone prays before they discuss
not preferring one idea over another until all the ideas have been discussed
not repeating the same things over and over
making a decision at the end that everyone supports
if everyone cannot agree, then everyone votes, and the idea that gets the most votes is used
if someone disagrees with the decision, they act as if they agreed with it until new facts are known (no one undermines the decision of the group)
if new facts are discovered, or the idea is tried and does not work so well, the group can consult again and consider the new things they know
Consultation is used by Bahá'í elected leaders when they gather in councils to make sure no one person gets to decide everything.
Married people consult with their husband or wife to solve difficulties in the marriage.
Parents and children may consult, teachers and students may consult, and Bahá'ís all consult as a community when they get together every nineteen days.
17th century and earlier
121 BC - Roman Election Riot of 121 BC (Rome, Roman Empire)
113 BC - Roman Election Riot of 113 BC (Rome, Roman Empire)
532 - Nika riots, (Constantinople, Byzantine Empire).
Deadliest riots in world history, with an estimated 30,000 killed in the Hippodrome.
1182 - (Constantinople, Byzantine Empire).
Venetians and other "Latins" massacred during a riot.
1229 - University of Paris strike of 1229, (Paris, France).
Student riot leads to closing of university for 2 years.
1355 - St. Scholastica riot, (Oxford, England)
1517 - Evil May Day, (London, England)
1607 - Midlands Uprising, (Northamptonshire/Warwickshire/Leicestershire, England)
1648 - Salt Riot, (Moscow, Russia)
1662 - Copper Riot, (Moscow, Russia)
1672 - Dutch Riot, (Hague, Netherlands)
1713 - Boston Bread Riot, (Boston, Massachusetts, USA)
1714 - Beer Tax Riots, (Alkmaar, Netherlands)
1715 - English Political Riot, (London, England)
1720 - French Financial Riot, (Paris, France)
1721 - English Servants Riot, (London, England)
1725 - French Food Riots of 1725, (Caen, Normandy/Paris, France)
1727 - English Anti-Turnpike Riot, (Bristol, England)
1733 - London Anti-Tax Riot, (London, England)
1734 - Mast Tree Riot, (Exeter, New Hampshire, USA)
1735 - English Anti-Turnpike Riots, (Hereford/Worcester, England)
1736 - Anti-Irish Riots, (Shoreditch/Spitalfields/Whitechapel, England)
1736 - Porteous Riots, (Edinburgh, Scotland)
1737 - Boston Brothel Riot, (Boston, Massachusetts, USA)
1738 - Wiltshire Weavers Riot, (Wiltshire, England)
1739 - French Food Riots of 1739, (Bordeaux/Bayeux/Caen/Angoulême/Lille, France)
1740 - French Bread Riot, (Paris, France)
1742 - Philadelphia Election Riot, (Philadelphia, Pennsylvania, USA)
1743 - Parisian Draft Riots, (Paris, France)
1746 - New Jersey Tennant Riots, (New Jersey, USA)
1746 - Anti-Catholic Riots, (Sunderland/Liverpool, England)
1747 - French Food Riots of 1747, (Toulouse/Guyenne, France)
1747 - Boston Anti-Impressment Riot, (Boston, Massachusetts, USA)
1750 - French Child Vagrancy Riot, (Paris, France)
1752 - French Food Riots of 1752, (Rouen/Paris, France)
1752 - French Draft Riot, (Vincennes, France)
1753 - English Anti-Turnpike Riots, (Leeds/Wakefield/Beeston, England)
1756 - Knowles Riot, (Boston, Massachusetts, USA)
1757 - English Anti-Militia Riots, (East Anglia/Lincoln/Northampton/Yorkshire East Riding, England)
1761 - Northumberland Miners Riot, (Yorkshire, England)
1763 - Anti-Irish Riots, (Covent Garden, England)
1763 - Weavers Riots, (England)
1764 - Paxton Riots, (Paxton, Pennsylvania, USA)
1766 - Esquilache Riots (Madrid, Spain)
1770 - Boston Massacre (Boston, Massachusetts, USA)
1770 - French Food Riots (Rheims, France)
1770 - Boston Anti-Loyalist Riot (Boston, Massachusetts, USA)
1771 - Plague Riot (Moscow, Russia)
1772 - Pine Tree Riot (Weare, New Hampshire, USA)
1772-1773 - English Food Riots, (England)
1773 - English Weavers Riots (England)
1775 - Anti-Loyalist Riot, (East Haddam, Connecticut, USA)
1775 - Philadelphia Anti-Loyalist Riot, (Philadelphia, Pennsylvania, USA)
1775 - French Corn Riots, (Beaumont-Sur-Oise, France)
1778 - French Bread Riots (Grenoble/Toulouse, France)
1779 - English Spinners Riot, (Chorley, England)
1780 - Gordon Riots, (London, England)
1784 - French Bread Riot, (Bayeux, France)
1785 - French Bread Riot, (Rennes, France)
1787 - Pre-French Revolution Food Riot, (Paris, France)
1788 - Doctors Mob Riot (Anti-Dissection Riot), (New York City, New York, USA)
1788 - French Spinners Riot, (Falaise, France)
1789 - Reveillon Riot, (Paris, France)
1790 - French Labor Riot, (Louviers, France)
1791 - Brussels Church and King, (Brussels, Belgium)
1791 - Priestley Riots, (Birmingham, England)
1792 - French Sugar Riots, (Paris, France)
1792 - February Beause Food Riots, (Beause, France)
1792 - November Beause Food Riots, (Beause, France)
1793 - Viennese Church and King Riots, (Vienna, Austria)
1793 - New York City Brothel Riot, (New York City, New York, USA)
1793 - Paris Food Riots, (Paris, France)
1794 - Whiskey Rebellion, (Western Pennsylvania, United States)
1794 - English Anti-Recruitment Riots, (England)
1795 - English Food Riots, (England)
1795 - 12th Germinal Riot, (Paris, France)
1796 - English riots against the Militia Laws (Lincolnshire, England)
1799 - Naples Church and King Riots, (Naples, Italy)
1807 - Baltimore Doctors' Riots, (Baltimore, Maryland, USA)
1811-1812 - English Luddite Riots, (Leicester/York, England)
1814 - English Luddite Riots of 1814, (Leicester/York, England)
1816 - English Luddite Riots of 1816, (Leicester/York, England)
1825 - Boston Brothel Riots, (Boston, Massachusetts, USA)
1825 - Portland Brothel Riots, (Portland, Maine, USA)
1829 - Charlestown Anti-Catholic Riots, (Boston, Massachusetts, USA)
1829 - Pennsylvania Brothel Riot, (Lenox, Pennsylvania, USA)
1830 - Swing Riots, (south and east of England)
1830 - Opera Riot (Belgium)
1831 - Cholera Riots, (Sevastopol/St. Petersburg, Russia)
1831 - Bristol Riots
1832 - Anti-Abolitionist Riot, (New York City, New York, USA)
1834 - Anti-Abolitionist Riot, (New York City, New York, USA)
1834 - Potato Riots, (Russia)
1835 - Five Points Riots, (New York City, New York, USA)
1835 - Baltimore Anti-Bank Riot (Baltimore, Maryland, USA
1835 - Gentleman's Riot, (Boston, Massachusetts, USA)
1837 - Flour Riots, (New York City, New York, USA)
1841 - Whig Party Riot, (Washington, D.C., USA)
1844 - Beer riots in Bavaria, (Bavaria, Germany)
1844 - Nativist Dissection Riot, (St. Louis, Missouri, USA
1844 - Philadelphia Nativist Riots, (Philadelphia, Pennsylvania, USA)
1849 - Stony Monday Riot, (Bytown, Ontario, Canada)
1849 - Astor Place Riots, (New York City, New York, USA)
1850 - Brothel Riot, (Troy, New York, USA)
1850 - Squatters' Riots, (California, USA)
1851 - Hoboken Anti-German Riot (Hoboken, New Jersey, USA
1855 - Bloody Monday (Louisville, Kentucky, USA)
1855 - Portland Rum Riot, (Portland, Maine, USA)
1855 - Lager Beer Riot, (Chicago, Illinois, USA)
1856 - Kansas Slavery Riots, (Lawrence, Kansas, USA)
1856 - Know-Nothing Riot of 1856, (Baltimore, Maryland, USA)
1857 - Know-Nothing Riot, (Washington D.C., USA)
1857 - New York Police Riots of 1857, (New York City, New York, USA)
1857 - Baltimore Election Riot of 1857, (Baltimore, Maryland, USA)
1858 - Baltimore Election Riot of 1858, (Baltimore, Maryland, USA)
1859 - Baltimore Election Riot of 1859, (Baltimore, Maryland, USA)
1860 - Lambing Flat riots, (New South Wales, Australia)
1861 - Baltimore Riot of 1861, (Baltimore, Maryland, USA)
1863 - New York Draft Riot, (New York City, New York, USA)
1866 - Memphis Race Riot, (Memphis, Tennessee), USA
1866 - New Orleans Riot, (New Orleans, Louisiana, USA)
1868 - Pulaski Riot, (Pulaski, Tennessee, USA)
1870 - Paris Riots of 1870, (Paris, France)
1870 - New York City Orange Riot, (New York City, New York, USA)
1871 - Second New York City Orange Riot, (New York City, New York, USA)
1871 - Los Angeles Anti-Chinese Riot, (Los Angeles, California, USA)
1873 - Colfax Riot, (Colfax, Louisiana, USA)
1874 - Tompkins Square Riot, (New York City, New York, USA)
1874 - Vicksburg Race Riot, (Vicksburg, Mississippi, USA)
1877 - Philadelphia Railroad Strike, (Philadelphia, Pennsylvania, USA)
1879 - Sydney Riot of 1879, (Sydney, Australia)
1881 - Canboulay Riots, (Trinidad and Tobago)
1884 - Hosay Riots, (Trinidad and Tobago)
1884 - Cincinnati Vigilante Riot, (Cincinnati, Ohio, USA)
1885 - Rock Springs Massacre, (Rock Springs, Wyoming, USA)
1885 - Pierce City Vigilante Riot, (Pierce City, Idaho, USA)
1886 - Haymarket Riot, (Chicago, Illinois, USA)
1887 - Louisiana Sugar Strike, (Louisiana, USA)
1891 - Anti-Missionary Riots, (China)
1891 - Valparaiso Anti-American Riot, (Valparaiso, Chile)
1891 - New Orleans Anti-Italian Riot, (New Orleans, Louisiana, USA)
1892 - Homestead Steel Riot, (Homestead, Pennsylvania, USA)
1892 - Coeur d'Alene Miners Strike of 1892, (Coeur d'Alene, Idaho, USA)
1892 - March on Washington, (Washington, D.C., USA)
1894 - Pullman Strike riots, (Chicago, Illinois, USA)
1898 - Wilmington Race Riot, (Wilmington, North Carolina, USA)
1899 - Coeur d'Alene Miners Strike of 1899, (Coeur d'Alene, Idaho, USA)
1901 - Denver Riots, (Denver, Colorado, USA)
1901 - New York Race Riots, (New York City, New York, USA)
1901 - Pierce City Riots, (Pierce City, Montana, USA)
1902 - French School Riots, (Brittany/Savoy, France)
1902 - Liverpool Riots, (Denver, Colorado, USA)
1903 - Kishinev pogrom, (Kishinev, Russia)
1903 - Bloomington Race Riot, (Bloomington, Indiana, USA)
1903 - Motormen's Riot, (Richmond, Virginia, USA)
1904 - Vaccine Revolt, (Rio de Janeiro, Brazil)
1905 - French Anti-Clerical Riots, (France)
1905 - Broome Riots, (Australia)
1905 - Bloody Sunday (1905), (St. Petersburg, Russia)
1906 - Atlanta Riots, (Atlanta, Georgia, USA)
1907 - Bellingham riots, (Bellingham, Washington, USA)
1908 - Springfield Race Riot, (Springfield, Illinois, USA)
1910 - Tonypandy Riot (South Wales, UK)
1911 - Champagne Riots, (France)
1913 - The Rite of Spring riot, May 29, 1913 (Théâtre des Champs-Élysées, Paris, France)
1916 - Washington Anti-Wobblies Riot, (Everett, Washington, USA)
1917 - St. Louis Strikebreakers Riot, (St. Louis, Missouri, USA)
1917 - East St. Louis Riot, (St. Louis, Missouri & East St. Louis, Illinois, USA)
1917 - Springfield Vigilante Riot, (Springfield, Missouri, USA)
1917 - Conscription Crisis of 1917, (Quebec, Canada)
1918 - Rice Riots, (Japan)
1919 - May Day Riots, (Cleveland, Ohio, USA)
1919 - Red Summer, (USA)
1919 - Chicago Race Riot, (Chicago, Illinois, USA)
1919 - Luton Riots, Luton U.K.
1919 - Boston Police Strike, (Boston, Massachusetts, USA)
1919 - Pennsylvania Steel Strike, (Pennsylvania, USA)
1919 - Elaine Race Riot, (Elaine, Arkansas, USA)
1919 - Longview Race Riot, (Longview, Texas, USA)
1919 - Washington, DC Riot of 1919, (Washington, D.C., USA)
1919 - Bloody Saturday, (Winnipeg, Manitoba, Canada)
1921 - Tulsa Race Riot, (Tulsa, Oklahoma, USA)
1922 - Herrin Mine Massacre, (Herrin, Illinois, USA)
1924 - Bhagalpur riots of 1924, (Bhagalpur, British India)
1929 - North Carolina Textile Strike, (North Carolina, USA)
1929 - Auburn Prison Riots, (Auburn, New York, USA)
1930 - Sherman Race Riot, (Sherman, Texas, USA)
1931 - Joliet Prison Riot, (Joliet, Illinois, USA)
1931 - Chicago Eviction Riot, (Chicago, Illinois, USA)
1931 - Hawaii Riot, (Hawaii, USA)
1931 - Greek nationalist riots (Nicosia, Cyprus)
1932 - Dearborn Massacre, (Dearborn, Michigan, USA)
1932 - Bonus Army Riot, (Washington, D.C., USA)
1933 - Arab Riot, (Palestine)
1933 - Christie Pits Race Riots (Toronto, Canada)
1934 - U.S. Nazi Riot (New York City, New York, USA)
1935 - Souther Tennant Farmers' Union Riot, (Arkansas, USA)
1935 - Harlem Race Riot (New York City, New York, USA)
1935 - Regina Riot (Regina, Saskatchewan, Canada)
1936 - Battle of Cable Street, (London, England)
1936 - Bhagalpur riots of 1936, (Bhagalpur, British India)
1937 - Memorial Day Massacre (Chicago, Illinois, USA)
1942 - Battle of Brisbane (Brisbane, Australia)
1943 - Zoot Suit Riots, (Los Angeles, California, USA)
1943 - Detroit Race Riot, (Detroit, Michigan, USA)
1946 - Direct Action Day, India
1946 - Euclid Beach Park Riot August 23, Cleveland, OH
1946 - Nylon Riots
1946 - Bhagalpur riots of 1946, (Bhagalpur, British India)
1947 - Jerusalem Riots of 1947, (Jerusalem)