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  • particles
  • As a result, the facility has drawn the attention of a number of space technology vendors, such as NASA and SpaceX, because as Metz says, "one of the most dangerous particles in space, for both astronauts and electronic equipment, are protons. (upenn.edu)
  • made
  • Nibauer-Cohen runs a robust Proton Alumni Group made up of patients who have completed proton therapy and wish to be a source of information and support for current and potential patients. (upenn.edu)
  • The first suggestion that energetic protons could be an effective treatment method was made by Robert R. Wilson in a paper published in 1946 while he was involved in the design of the Harvard Cyclotron Laboratory (HCL). (wikipedia.org)
  • This was solved by a jump, or a sudden shift in the acceleration, in which pulsed quadruples made the protons transverse the transition energy level much faster. (wikipedia.org)
  • Proton made minor changes to the taillights, bumpers, and dashboard. (wikipedia.org)
  • As of 2013, no Proton-M launches have been made without an upper stage. (wikipedia.org)
  • quark
  • The quark content of a proton. (wikipedia.org)
  • a 'down' quark has a charge of - 1/3e, where e is the elementary charge (+1.6 x 10^-19 C). can is say that a proton contain 3 ' up ' quark and 1 'down' quark? (physicsforums.com)
  • The sum of the quark masses is only a small percentage of the mass of a proton. (physicsforums.com)
  • However, experiments involving some of the most advanced particle accelerators in the world indicate that a maximum of 30 percent of proton spin originates from quark spin. (scienceblog.com)
  • beam
  • In the field of medical procedures, Proton therapy, or proton beam therapy is a type of particle therapy that uses a beam of protons to irradiate diseased tissue, most often in the treatment of cancer. (wikipedia.org)
  • The chief advantage of proton therapy over other types of external beam radiotherapy is that as a charged particle the dose is deposited over a narrow range and there is minimal exit dose. (wikipedia.org)
  • Proton therapy is a type of external beam radiotherapy that uses ionizing radiation. (wikipedia.org)
  • Adjusting proton energy during the treatment maximizes the cell damage the proton beam causes within the tumor. (wikipedia.org)
  • rocket
  • This stage remains in use today atop the Proton rocket. (friends-partners.org)
  • RD-253 a liquid rocket engine, burning UDMH/N2O4 that powers the Proton first stage. (wikipedia.org)
  • Khrunichev State Research and Production Space Center - The Proton-M and Angara (rocket) manufacturer that delegate engine production to this plant. (wikipedia.org)
  • On 7 July 2007, International Launch Services launched the first Proton-M Enhanced rocket (also called M+), which carried the DirecTV-10 satellite into orbit. (wikipedia.org)
  • The Proton satellites were the source of the name for the Proton rocket, which launched them as some of its first payloads. (wikipedia.org)
  • Therapy Center
  • Ask anyone involved in the Roberts Proton Therapy Center at Penn Medicine 's Abramson Cancer Center -patient, physician, technician, engineer, receptionist, physicist-and they will have powerful personal stories to share about this unique facility and the people devoted to it. (upenn.edu)
  • James Metz , who has led the development of the Roberts Proton Therapy Center since its inception, likens it to "a Star Wars movie set," and the comparison is an apt one. (upenn.edu)
  • According to Kurt Morath, director of operations for the Hospital of the University of Pennsylvania , this research room makes the Roberts Proton Therapy Center one of only two facilities in the world with a full research beamline for protons, and the only one in the country to integrate both photon and proton modalities into a single room. (upenn.edu)
  • Because this is especially important for children, who can suffer the side effects of radiation therapy for years or even decades afterwards, pediatric patients account for nearly a quarter of the treatments given at the Roberts Proton Therapy Center. (upenn.edu)
  • jointly
  • The Juara was to be jointly developed by Proton and Mitsubishi Motors as an export model under the Mitsubishi badge. (wikipedia.org)
  • nucleus
  • The number of protons in the nucleus is the defining property of an element, and is referred to as the atomic number (represented by the symbol Z ). Since each element has a unique number of protons, each element has its own unique atomic number. (wikipedia.org)
  • The word proton is Greek for "first", and this name was given to the hydrogen nucleus by Ernest Rutherford in 1920. (wikipedia.org)
  • The nucleus of the most common isotope of the hydrogen atom (with the chemical symbol "H") is a lone proton. (wikipedia.org)
  • In 1917 (in experiments reported in 1919), Rutherford proved that the hydrogen nucleus is present in other nuclei, a result usually described as the discovery of protons. (wikipedia.org)
  • magnetic
  • Quantum physical interactions mean that spin is responsible for the magnetic moment of protons, and therefore also the stability of the universe. (scienceblog.com)
  • The proton magnetometer, also known as the proton precession magnetometer (PPM), uses the principle of Earth's field nuclear magnetic resonance (EFNMR) to measure very small variations in the Earth's magnetic field, allowing ferrous objects on land and at sea to be detected. (wikipedia.org)
  • A direct current flowing in a solenoid creates a strong magnetic field around a hydrogen-rich fluid (kerosine and decane are popular, and even water can be used), causing some of the protons to align themselves with that field. (wikipedia.org)
  • The current is then interrupted, and as protons realign themselves with the ambient magnetic field, they precess at a frequency that is directly proportional to the magnetic field. (wikipedia.org)
  • The relationship between the frequency of the induced current and the strength of the magnetic field is called the proton gyromagnetic ratio, and is equal to 0.042576 Hz nT−1. (wikipedia.org)
  • In 1958 Glenn A. Black and Eli Lilly, following the work of M. J. Aitken and his associates at the Oxford University (UK) Archaeometric Laboratory, used proton magnetometers to locate and map buried archaeological features, including iron objects in the soil, thermoremanent magnetization of fired clays, and differences in the magnetic susceptibility of disturbed soils. (wikipedia.org)
  • electron
  • A fast proton moving through matter will slow by interactions with electrons and nuclei, until it is captured by the electron cloud of an atom. (wikipedia.org)
  • In vacuum, when free electrons are present, a sufficiently slow proton may pick up a single free electron, becoming a neutral hydrogen atom , which is chemically a free radical . (wikipedia.org)
  • relatively
  • Ice is a proton conductor through the Grotthuss mechanism, albeit a relatively poor one. (wikipedia.org)
  • Relatively high proton conductivity has also been found in rare-earth ortho-niobates and ortho-tantalates as well as rare-earth tungstates. (wikipedia.org)
  • orbit
  • Most Proton-M launches have used a Briz-M upper stage to propel the spacecraft into a higher orbit. (wikipedia.org)
  • Launch
  • Spyshots of the finalized Proton MPV were leaked onto the internet on 23 January 2009, 3 months ahead of its official launch. (wikipedia.org)
  • The Proton-M, (Протон-М) GRAU index 8K82M or 8K82KM, is a Russian heavy-lift launch vehicle derived from the Soviet-developed Proton. (wikipedia.org)
  • This was the 326th launch of a Proton, the 16th Proton-M/Briz-M launch, and the 41st Proton launch to be conducted by ILS. (wikipedia.org)
  • initially
  • The car was to be designed to suit Malaysian tastes and expectations, and was initially believed to be based on a Mitsubishi or Volkswagen platform, but Proton later confirmed that it would be built from the ground up on an all-new platform. (wikipedia.org)
  • From the sketches, it was initially speculated that the Proton MPV was related to a similar MPV from China's Chery, but it was later proven that there were no such relations between the two cars. (wikipedia.org)
  • treatments
  • In most treatments, protons of different energies with Bragg peaks at different depths are applied to treat the entire tumor. (wikipedia.org)
  • stake
  • By 2005, Mitsubishi had divested their stake in Proton to Khazanah Nasional, and in 2012, Proton was fully acquired by DRB-HICOM. (wikipedia.org)
  • In May 2017, DRB-HICOM announced plans to sell a 49.9% stake in Proton and a 51% stake in Lotus to Geely Automobile Holdings. (wikipedia.org)
  • additionally
  • At the end of 2005, Proton additionally introduced another variant of the Waja, known as Proton Chancellor. (wikipedia.org)
  • Additionally, the last two Proton Wiras were registered in the United Kingdom in 2006, and 76 Wiras were sold in Indonesia in 2010. (wikipedia.org)