Ben Maurice Segal (born 19 May 1937 in Tel Aviv) is a British-Swiss computer scientist. He is known for his role as an Internet promoter. [1] [2]
Ben Maurice Segal (born 19 May 1937 in Tel Aviv) is a British-Swiss computer scientist. He is known for his role as an Internet promoter. [1] [2]
He attended William Hulme's Grammar School, Manchester, and then Imperial College, London, graduating with a Bachelor of Science in physics and mathematics in 1958. [3]
Segal worked from 1958 to 1962 for the UK Atomic Energy Authority, Industrial Division, in Risley, on fast breeder reactor development. [4] He then moved to Detroit, Michigan, USA, to work on the Enrico Fermi fast breeder project from 1962 to 1965, [5] and then to Stanford University in California for a PhD in mechanical and nuclear engineering (1966–1971). His thesis was on “Shock wave structure using nonlinear model Boltzmann equations” under the supervision of Joel H. Ferziger. [6] [7]
In July 1971 he returned to Europe and worked as a systems programmer and later as a computer networking specialist at CERN—the European Organization for Nuclear Research in Geneva, Switzerland. Apart from a sabbatical year in 1977 working at the Bell Northern Research laboratory in Palo Alto, California, he stayed at CERN until his retirement in 2002.
Between 1985 and 1988 he co-ordinated the introduction at CERN of the TCP/IP Internet protocols, permitting interconnection of the principal computer systems inside the laboratory before CERN joined the world Internet in early 1989. [8] [9] [10] [11] [12] [13]
From 1989 he played a major role in the project “SHIFT” that replaced CERN's mainframe computers by distributed Unix clusters. [14] [15] [16] Segal was responsible for the system's high performance computer network. By the year 2000, SHIFT had already increased CERN's installed computing power by a factor of a hundred. The SHIFT architecture was then extended to build the World Wide LHC Computing Grid, [17] used since that time to analyse the massive and still increasing amounts of experimental data taken by the physics experiments around the Large Hadron Collider at CERN. In 2001 CERN was awarded the Computerworld Honors award for 21st Century Achievement for this innovative application of information technology to the benefit of society. [18] [19] [20]
Segal was a member of the Internet Society board of trustees between 1997 and 2000. [21] [22]
Since his retirement, Segal remained active until 2023 as an honorary member of the CERN personnel. He has worked in the developing field of volunteer computing where the general public is invited to contribute to major scientific computing challenges by volunteering some of their private computing power. Segal co-founded and is still active in CERN's own such project, LHC@home, [23] [24] which has attracted several hundred thousand contributors since its launch in 2004. [25] [26] [27]
The European Organization for Nuclear Research, known as CERN, is an intergovernmental organization that operates the largest particle physics laboratory in the world. Established in 1954, it is based in Meyrin, western suburb of Geneva, on the France–Switzerland border. It comprises 23 member states. Israel, admitted in 2013, is the only non-European full member. CERN is an official United Nations General Assembly observer.
Grid computing is the use of widely distributed computer resources to reach a common goal. A computing grid can be thought of as a distributed system with non-interactive workloads that involve many files. Grid computing is distinguished from conventional high-performance computing systems such as cluster computing in that grid computers have each node set to perform a different task/application. Grid computers also tend to be more heterogeneous and geographically dispersed than cluster computers. Although a single grid can be dedicated to a particular application, commonly a grid is used for a variety of purposes. Grids are often constructed with general-purpose grid middleware software libraries. Grid sizes can be quite large.
The Large Hadron Collider (LHC) is the world's largest and highest-energy particle collider. It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and hundreds of universities and laboratories across more than 100 countries. It lies in a tunnel 27 kilometres (17 mi) in circumference and as deep as 175 metres (574 ft) beneath the France–Switzerland border near Geneva.
Nicholas Constantine Metropolis was a Greek-American physicist.
LHC@home is a volunteer computing project researching particle physics that uses the Berkeley Open Infrastructure for Network Computing (BOINC) platform. The project's computing power is utilized by physicists at CERN in support of the Large Hadron Collider and other experimental particle accelerators.
Maria Spiropulu is a Greek particle physicist. She is the Shang-Yi Ch'en Professor of Physics at the California Institute of Technology.
Pakistan Atomic Energy Commission (PAEC) is a federally funded independent governmental agency, concerned with research and development of nuclear power, promotion of nuclear science, energy conservation and the peaceful usage of nuclear technology.
This timeline lists significant discoveries in physics and the laws of nature, including experimental discoveries, theoretical proposals that were confirmed experimentally, and theories that have significantly influenced current thinking in modern physics. Such discoveries are often a multi-step, multi-person process. Multiple discovery sometimes occurs when multiple research groups discover the same phenomenon at about the same time, and scientific priority is often disputed. The listings below include some of the most significant people and ideas by date of publication or experiment.
The Worldwide LHC Computing Grid (WLCG), formerly the LHC Computing Grid (LCG), is an international collaborative project that consists of a grid-based computer network infrastructure incorporating over 170 computing centers in 42 countries, as of 2017. It was designed by CERN to handle the prodigious volume of data produced by Large Hadron Collider (LHC) experiments.
Computational particle physics refers to the methods and computing tools developed in and used by particle physics research. Like computational chemistry or computational biology, it is, for particle physics both a specific branch and an interdisciplinary field relying on computer science, theoretical and experimental particle physics and mathematics. The main fields of computational particle physics are: lattice field theory, automatic calculation of particle interaction or decay and event generators.
The safety of high energy particle collisions was a topic of widespread discussion and topical interest during the time when the Relativistic Heavy Ion Collider (RHIC) and later the Large Hadron Collider (LHC)—currently the world's largest and most powerful particle accelerator—were being constructed and commissioned. Concerns arose that such high energy experiments—designed to produce novel particles and forms of matter—had the potential to create harmful states of matter or even doomsday scenarios. Claims escalated as commissioning of the LHC drew closer, around 2008–2010. The claimed dangers included the production of stable micro black holes and the creation of hypothetical particles called strangelets, and these questions were explored in the media, on the Internet and at times through the courts.
"Equation of State Calculations by Fast Computing Machines" is a scholarly article published by Nicholas Metropolis, Arianna W. Rosenbluth, Marshall N. Rosenbluth, Augusta H. Teller, and Edward Teller in the Journal of Chemical Physics in 1953. This paper proposed what became known as the Metropolis Monte Carlo algorithm, which forms the basis for Monte Carlo statistical mechanics simulations of atomic and molecular systems.
Quark–gluon plasma is an interacting localized assembly of quarks and gluons at thermal and chemical (abundance) equilibrium. The word plasma signals that free color charges are allowed. In a 1987 summary, Léon van Hove pointed out the equivalence of the three terms: quark gluon plasma, quark matter and a new state of matter. Since the temperature is above the Hagedorn temperature—and thus above the scale of light u,d-quark mass—the pressure exhibits the relativistic Stefan-Boltzmann format governed by temperature to the fourth power and many practically massless quark and gluon constituents. It can be said that QGP emerges to be the new phase of strongly interacting matter which manifests its physical properties in terms of nearly free dynamics of practically massless gluons and quarks. Both quarks and gluons must be present in conditions near chemical (yield) equilibrium with their colour charge open for a new state of matter to be referred to as QGP.
GridPP is a collaboration of particle physicists and computer scientists from the United Kingdom and CERN. They manage and maintain a distributed computing grid across the UK with the primary aim of providing resources to particle physicists working on the Large Hadron Collider (LHC) experiments at CERN. They are funded by the UK's Science and Technology Facilities Council. The collaboration oversees a major computing facility called the Tier1 at the Rutherford Appleton Laboratory (RAL) along with the four Tier 2 organisations of ScotGrid, NorthGrid, SouthGrid and LondonGrid. The Tier 2s are geographically distributed and are composed of computing clusters at multiple institutes.
Guido Tonelli is an Italian particle physicist who was involved with the discovery of the Higgs boson at the Large Hadron Collider. He is a professor of General Physics at the University of Pisa (Italy) and a CERN visiting scientist.
The index of physics articles is split into multiple pages due to its size.
Paul Frederick Zweifel was a mathematical physicist and a prominent leader in the mathematical theory of nuclear reactors and the mathematical development of linear transport theory, a discipline that encompasses neutron transport in the core of a nuclear reactor as well as the propagation of photons in radiative transfer.
François Flückiger is a French computer scientist who worked at CERN. He was selected for induction in 2013 in the Internet Hall of Fame.
MOOSE is an object-oriented C++ finite element framework for the development of tightly coupled multiphysics solvers from Idaho National Laboratory. MOOSE makes use of the PETSc non-linear solver package and libmesh to provide the finite element discretization.
The Scattering and Neutrino Detector (SND) at the Large Hadron Collider (LHC), CERN, is an experiment built for the detection of the collider neutrinos. The primary goal of SND is to measure the p+p --> +X process and search for the feebly interacting particles. It will be operational from 2022, during the LHC-Run 3 (2022-2024). SND will be installed in an empty tunnel- TI18 that links the LHC and Super Proton Synchrotron, 480m away from the ATLAS experiment interaction point in the fast forward region and along the beam collision axis.