The company received its current name in January 2006, when Ameritrade Holding Corporation acquired TD Waterhouse from Toronto-Dominion Bank and was renamed TD Ameritrade.
Mutual of Omaha
Mutual of Omaha is a mutual insurance company with headquarters in Omaha, Nebraska. The company is on the Fortune 500.
Mutual insurance
A mutual insurance company is an insurance company that is owned by its customers. If the company is profitable, the profits are returned to the customers. This is different from other insurance companies, which are public companies.
Lil Yachty
Lil Yachty is the stage name of Miles Parks McCollum (born August 23, 1997). McCollum is an American rapper, singer, and songwriter from Georgia.
McCollum first received attention in August 2015 for his single "One Night" which topped at no. 49 on the Billboard Hot 100. Since then he has released four projects, "Lil Boat", "Summer Songs", "Summer Songs 2", and "Teenage Emotions". "Teenage Emotions" peaked at no. 5 on the US Billboard 200. He has also appeared on "KYLE's" "iSpy" which reached no. 1 on the Billboard Hot 100 and DRAM's "Broccoli" which reached no. 5.
Fortune 500
The Fortune 500 is a list of the companies in the United States with the most revenue. It is created by "Fortune" magazine. The first list was published in 1955.
Fortune (magazine)
Fortune is a magazine that talks about business topics. It publishes the Fortune 500 list of the companies in the United States with the most revenue.
Seismic wave
Seismic waves are vibrating movement of the ground. Seismic waves can be caused by underground explosions, volcanic eruptions and man-made explosions that can vibrate the ground. Seismic waves go through the Earth’s layers. The speed of seismic waves depends on the type of materials they meet. When they meet different kind of material, they bounce or go in different directions. Seismic waves can be detected by seismographs.
Seismic waves are caused by earthquakes, underground explosions, volcanic eruptions and man-made explosions that can vibrate the ground. When earthquakes occur, they release energy in a form of seismic waves. Seismic waves make the ground vibrating to all directions from the starting point of the earthquake.
Seismic waves are divided into two main types of waves, body waves and surface waves. Body waves go through the Earth, and surface waves go along the Earth’s surface.
Body waves travel through the Earth’s interior. Body waves are divided into two types, primary waves and secondary waves.
Primary waves travel faster than any other waves, so when earthquakes occur primary waves arrive first at the surface. That’s why we call them ‘primary’.
Primary waves can go through solids, liquids and gases. Primary waves go 7~8 kilometers per second in solids, but primary waves have different speeds in liquids and gases.
The ground moves back and forth in the same direction as the primary waves move. Primary waves repeat squeezing and stretching the ground when they move.
Secondary waves arrive after primary waves. That’s why we call them ‘secondary’. Secondary waves can go 3~4 kilometers per second. Secondary waves can’t go through air and liquids. They can only go through solids. The ground moves up and down in the right angle to the direction of the secondary waves. Secondary waves temporary change the shape of materials.
Surface waves travel along the Earth’s surface. They come after the body waves. Surface waves are caused by primary waves and secondary waves when they arrive at the surface. There are two types of surface waves.
Rayleigh waves were named after John William Strutt Rayleigh. When Raleigh waves travel, the particles move in an oval shape, similar to water waves. The speed of Rayleigh waves depends on the types of solids. Information about Rayleigh waves give us the reason why the ground vibrates. Rayleigh waves are slower than Love waves.
Love waves were named after A.E.H. Love. Particles move back and forth at a 90 degree angle to the wave direction. The speed of Love waves depends on the types of solids. We can know the thickness of the Earth’s crust with Love waves. Love waves usually travel faster than the Rayleigh waves.
Seismic waves can be detected and recorded by seismographs. Primary waves are recorded faster than secondary waves. The period between the arrival time of primary waves and secondary waves is used to find the starting point of the wave. We can know about the Earth’s layer through seismic waves.
Tony Madigan
Antony Morgan "Tony" Madigan (4 February 1930 – 29 October 2017) was an Australian boxer and rugby player. He competed in boxing at the 1952, 1956 and 1960 Olympics and finished in fifth, fifth and third place.
In 1960 Madigan lost his semifinal to Muhammad Ali. He also won medals at three Commonwealth Games in the light-heavyweight division – a silver in 1954 and gold in 1958 and 1962.
Madigan was the 2010 addition for the Australian National Boxing Hall of Fame Veterans category.
Madigan died in France on 29 October 2017 of complications from pneumonia at the age of 87.
Denise P. Barlow
Denise Patrice Barlow (31 January 1950 – 21 October 2017) was a British geneticist. She was born in Yorkshire. She worked in the field of epigenomics.
Barlow was an elected member of European Molecular Biology Organization (EMBO), an honorary professor of genetics at the University of Vienna and received the Erwin Schrödinger Prize of the Austrian Academy of Sciences in 2014. Her discovery of the first mammalian imprinted gene, IGF2R, which codes for the insulin-like growth factor was her best known work.
Barlow died of pancreatic cancer in Vienna, Austria on 21 October 2017 at the age of 67.
Hossein Rajabian
Hossein Rajabian (; born 5 July 1984) is an Iranian movie director, writer and photographer who was imprisoned in 2015 on charges related to his filmmaking.
After finishing his first feature movie, Rajabian was arrested by Iranian security forces on 5 October 2013 outside his office in Sari alongside two musicians, and was transferred to Ward 2-A of Evin Prison where all three of them were held in solitary confinement for more than two months and were threatened with televised confessions. He was released on bail (around $66,000) in mid-December, pending trial. Two years later, his case was heard at Branch 28 of Tehran which was presided over by Judge Moghisseh (Summer 2015). He was sentenced to six years in prison and fines for pursuing illegal cinematic activities, launching propaganda against the establishment and hurling insults at sanctities. On appeal, his sentence was changed to three years imprisonment and three years of suspended jail and fines.
Hossein Rajabian was sent to the ward 7 of Evin Prison in Tehran. After spending one third of his total period of imprisonment (that is 11 months), he went on hunger strike to protest against unjust trial, lack of medical facilities, and transfer of his brother to another ward called section 8 of the same prison. During the first hunger strike period, which lasted 14 days, he was transferred to hospital because of pulmonary infection and he could not continue his hunger strike because of the interference of the representative of the prosecutor who was sent as an intermediary. After some time, he sent an open letter to the judicial authorities of Iran and went again on strike which brought him the supports of international artists. After 36 days of hunger strike, he could convince the judicial authorities of Iran to review his case and grant him medical leave for the treatment of his left kidney suffered from infections and blood arising out of hunger strike. he, after a contentious struggle with the judicial officer of the prison was sent to the ward 8 for punishment.