Fermi - The newly discovered eROSITA X-ray bubbles in the Milky Way’s centre, together with the Fermi bubbles and microwave haze, may be explained by a single episode of central supermassive-black-hole ...

 
Fermi energy is a concept in quantum mechanics that usually refers to the energy difference between the highest and lowest occupied single-particle states in a quantum system of non-interacting fermions at absolute zero temperature. The value of the Fermi level at absolute zero temperature (−273.15 °C) is known as the Fermi energy. . Rug direct

Fermi had a knack for making roughly-accurate estimates with very little data, and therefore such an estimate is known today as a Fermi estimate. Why bother with Fermi estimates, if your estimates are likely to be off by a factor of 2 or even 10? Often, getting an estimate within a factor of 10 or 20 is enough to make a decision.The Fermi bubbles, filled with ultra-fast particles called cosmic rays, can only be spotted by telescopes that detect high-energy gamma rays, while the eROSITA bubbles — filled with blazing hot ...Enrico Fermi, (born Sept. 29, 1901, Rome, Italy—died Nov. 28, 1954, Chicago, Illinois, U.S.), Italian-born American scientist who was one of the chief architects of the nuclear age. He developed the mathematical statistics required to clarify a large class of subatomic phenomena, explored nuclear transformations caused by neutrons, and ... Option 1: Select the report type. lists only active courses and qualifications with due dates. is similar to the ITP, however it lists the most current training dates for all courses and qualifications taken, regardless of the active status and due dates. is a complete report of all training taken and qualifications completed. fermi: [noun] a former SI unit of length equal to 10−15 centimeters : femtometer. ENRICO FERMI. Enrico Fermi was born in Rome, Italy, on September 29, 1901. He earned a scholarship to the University of Pisa and completed a Ph.D. in physics by 1922. Shortly thereafter, Fermi studied in Göttingen, Germany, under Max Born, where Robert Oppenheimer would earn his Ph.D. in 1927. From Göttingen, Fermi took a fellowship to study ...IFermi is a Python (3.6+) library and set of command-line tools for the generation, analysis, and visualisation of Fermi surfaces and Fermi slices. The goal of the library is to provide fully featured FermiSurface and FermiSlice objects that allow for easy manipulation and analysis. The main features include:The Fermi Large Area Telescope (LAT) has revolutionized pulsar science by detecting and studying the gamma-ray properties of more than 150 pulsars. These gamma-ray pulsars divide into three classes: Young pulsars detected using radio ephemerides. Pulsars discovered through gamma-ray pulsations. Millisecond pulsars detected using radio ephemerides.Enrico Fermi, (born Sept. 29, 1901, Rome, Italy—died Nov. 28, 1954, Chicago, Illinois, U.S.), Italian-born American scientist who was one of the chief architects of the nuclear age. He developed the mathematical statistics required to clarify a large class of subatomic phenomena, explored nuclear transformations caused by neutrons, and ...FERMI (Free Electron laser Radiation for Multidisciplinary Investigations) is a seeded free electron laser (FEL) source operating at Elettra Sincrotrone Trieste. FERMI is an international user facility for scientific investigations ranging from chemistry to condensed matter physics and from advanced technology to biology.But how these so-called "Fermi bubbles" arose was a mystery. A pair of gigantic gamma-ray bubbles centered on the core of the Milky Way galaxy were discovered by the Fermi Gamma-ray Space ...NASA.gov brings you the latest images, videos and news from America's space agency. Get the latest updates on NASA missions, watch NASA TV live, and learn about our quest to reveal the unknown and benefit all humankind. noun fer· mi ˈfer- (ˌ)mē ˈfər- : a former SI unit of length equal to 10−15 meters : femtometer Word History Etymology Enrico Fermi First Known Use 1955, in the meaning defined above Time Traveler The first known use of fermi was in 1955 See more words from the same year Dictionary Entries Near fermi fermeture fermi Fermi See More Nearby EntriesThe Fermi energy of a (n-doped) semiconductor is typically rather close to the band edge. In fact, by controlling the doping, it can be made it as close to the band edge as we want. On the other hand, in metal, where the conduction band is partially filled with electrons, the Fermi energy is necessarily quite big.Topics cover much of the gamma-ray band ranging from keV-MeV transients seen with Fermi's GBM to the highest energies observed by the LAT and the very high energies observed by ground-based gamma-ray telescopes. This year's school will be held at the University of Delaware Conference Center in Lewes, Delaware, from May 31 to June 10, 2022 ...The Fermi Gamma-ray Space Telescope. Click on the images or topic name for information about these science topics.Large Area Telescope (LAT) The primary interaction of photons in the Fermi energy range with matter is pair conversion. This process forms the basis for the underlying measurement principle by providing a unique signature for gamma rays, which distinguishes them from charged cosmic rays whose flux is as much as 10 5 times larger, and allowing a ...Nov 1, 2011 · Large Area Telescope (LAT) The primary interaction of photons in the Fermi energy range with matter is pair conversion. This process forms the basis for the underlying measurement principle by providing a unique signature for gamma rays, which distinguishes them from charged cosmic rays whose flux is as much as 10 5 times larger, and allowing a determination of the incident photon directions ... Fermi 2 Power Plant began commercial operation in 1988 and has since produced more than 200 billion kilowatt hours of electricity for DTE Energy customers. In 2001, Fermi 2 Power Plant was the first nuclear power plant in the state to achieve Clean Corporate Citizen (C3) status. The Michigan Department of Environmental Quality's voluntary C3 ...Sep 9, 2021 · The Fermi paradox ponders why Earth has not been visited by aliens, while the Drake equation tries to estimate the number of intelligent civilizations in our galaxy. Both concepts involve a lot of uncertainty, because when it comes to extraterrestrial life, there’s a lot we don’t know. “These two tools are foundational in the sense that ... Feb 17, 2016 · The Fermi Large Area Telescope (LAT) has revolutionized pulsar science by detecting and studying the gamma-ray properties of more than 150 pulsars. These gamma-ray pulsars divide into three classes: Young pulsars detected using radio ephemerides. Pulsars discovered through gamma-ray pulsations. Millisecond pulsars detected using radio ephemerides. Tracy Marc, Fermilab, [email protected], 224-290-7803. The U.S. Department of Energy has formally approved the start of full construction for the PIP-II project, an essential upgrade to the accelerator complex at Fermi National Accelerator Laboratory. The heart of the project is a powerful new superconducting linear accelerator that will enable ...The analysis threads are part of a hierarchical documentation set offered in support of Fermi data analysis. The threads are basically "cookbook" analysis examples which could for example be followed verbatim and then repeated but substituting data sets and observational scenarios of your own choosing. The other components of the documentation ...Enrico Fermi was born in Rome, Italy, on September 29, 1901, the third child of Alberto and Ida de Gattis Fermi. Ida was a remarkable woman, trained as a teacher, highly intelligent and a major ...Fermi energy is a concept in quantum mechanics that usually refers to the energy difference between the highest and lowest occupied single-particle states in a quantum system of non-interacting fermions at absolute zero temperature. The value of the Fermi level at absolute zero temperature (−273.15 °C) is known as the Fermi energy.The Fermi Science Support Center (FSSC) runs the guest investigator program, creates and maintains the mission time line, provides analysis tools for the scientific community, and archives and serves the Fermi data. This web site is the portal to Fermi for all guest investigators. This view shows the entire sky at energies greater than 1 GeV ... The fermi is a unit of measurement of length. A fermi is equivalent to a femtometer, and is the older non–SI measurement unit of length, in honour of Italian physicist Enrico Fermi (29 September 1901 — 28 November 1954), since it is a typical length-scale of, and often referenced in nuclear physics. Femtometer is a derived metric ...Fermi announced that this was much too low, and the real number was about one in ten. What followed was a sparring match as both men criticized and revised their rough estimates of the likelihood ...noun fer· mi ˈfer- (ˌ)mē ˈfər- : a former SI unit of length equal to 10−15 meters : femtometer Word History Etymology Enrico Fermi First Known Use 1955, in the meaning defined above Time Traveler The first known use of fermi was in 1955 See more words from the same year Dictionary Entries Near fermi fermeture fermi Fermi See More Nearby EntriesFermi Data. This is the portal to the Fermi data and the software to analyze them. It contains information about: Data Policy - a summary of the policies governing the release of Fermi science data. As a resource for proposers the Fermi LAT consortium, through an agreement with NASA, has provided a source catalog based on data from the first ...Fermi energy is a concept in quantum mechanics that usually refers to the energy difference between the highest and lowest occupied single-particle states in a quantum system of non-interacting fermions at absolute zero temperature. The value of the Fermi level at absolute zero temperature (−273.15 °C) is known as the Fermi energy. Feb 24, 2023 · Fermi announced that this was much too low, and the real number was about one in ten. What followed was a sparring match as both men criticized and revised their rough estimates of the likelihood ... Aug 31, 2023 · Campus access – Users and Badging Office START HERE. Report concerns or violations. Inside Fermilab (intranet) Visa Office. Users Executive Committee. Use Fermilab's scientific facilities. Fermilab Student and Postdoc Association. Fellowships and Ph.D. Programs. U.S. Particle Accelerator School. The Fermi Science Support Center (FSSC) runs the guest investigator program, creates and maintains the mission time line, provides analysis tools for the scientific community, and archives and serves the Fermi data. This web site is the portal to Fermi for all guest investigators. This view shows the entire sky at energies greater than 1 GeV ...Fermi Problems. Fermi problems, named after physicist Enrico Fermi, are open-ended problems where students have to make assumptions, estimates, and educated guesses to creatively solve a problem. These complicated problem-solving exercises help students gain confidence in thinking like an engineer or scientist. Enrico Fermi, (born Sept. 29, 1901, Rome, Italy—died Nov. 28, 1954, Chicago, Illinois, U.S.), Italian-born American scientist who was one of the chief architects of the nuclear age. He developed the mathematical statistics required to clarify a large class of subatomic phenomena, explored nuclear transformations caused by neutrons, and ... Fermi Problems. Fermi problems, named after physicist Enrico Fermi, are open-ended problems where students have to make assumptions, estimates, and educated guesses to creatively solve a problem. These complicated problem-solving exercises help students gain confidence in thinking like an engineer or scientist. Enrico Fermi Biographical . E nrico Fermi was born in Rome on 29th September, 1901, the son of Alberto Fermi, a Chief Inspector of the Ministry of Communications, and Ida de Gattis. He attended a local grammar school, and his early aptitude for mathematics and physics was recognized and encouraged by his father’s colleagues, among them A. Amidei. Fermi Research Alliance, LLC manages and operates the Fermi National Accelerator Laboratory pursuant to Contract number DE-AC02-07CH11359 with the United States Department of Energy. The Period of Performance is January 1, 2007 through December 31, 2024. Current Conformed Prime Contract. Original Prime Contract. Substantive Contract Modifications.May 20, 2022 · The analysis threads are part of a hierarchical documentation set offered in support of Fermi data analysis. The threads are basically "cookbook" analysis examples which could for example be followed verbatim and then repeated but substituting data sets and observational scenarios of your own choosing. The other components of the documentation ... Fermi energy is a concept in quantum mechanics that usually refers to the energy difference between the highest and lowest occupied single-particle states in a quantum system of non-interacting fermions at absolute zero temperature. The value of the Fermi level at absolute zero temperature (−273.15 °C) is known as the Fermi energy.Prior to the launch of Fermi, the GBM team developed a GUI-based spectral analysis software tool in IDL, called RMfit, specializing in the analysis of GBM trigger data. More than 10 years later, an open source, multi-wavelength approach is desirable, integrating with the long-standing community standard fitting engine, XSPEC.fermi: [noun] a former SI unit of length equal to 10−15 centimeters : femtometer.Kevin Burkett is the Associate Lab Director for the Particle Physics Directorate at Fermilab, which includes the Deep Underground Neutrino Experiment and neutrino, cosmic, energy frontier and muon research programs. Since joining the lab as a Wilson Fellow in 2003, he has held a number of leadership positions, including CMS Center Deputy Head ...Fermi Problems. Fermi problems, named after physicist Enrico Fermi, are open-ended problems where students have to make assumptions, estimates, and educated guesses to creatively solve a problem. These complicated problem-solving exercises help students gain confidence in thinking like an engineer or scientist.Prior to the launch of Fermi, the GBM team developed a GUI-based spectral analysis software tool in IDL, called RMfit, specializing in the analysis of GBM trigger data. More than 10 years later, an open source, multi-wavelength approach is desirable, integrating with the long-standing community standard fitting engine, XSPEC.Aug 29, 2001 · The young Enrico Fermi. Enrico Fermi was born on 29 September 1901 in Rome to a family with no scientific traditions. His passion for natural sciences, and in particular for physics, was stimulated and guided in his school years by an engineer and family friend, Adolph Amidei, who recognized Fermi’s exceptional intellectual abilities and suggested admission to Pisa’s Scuola Normale Superiore. The Fermi Gamma-ray Space Telescope, formerly GLAST, is opening this high-energy world to exploration and helping us answer these questions. With Fermi, astronomers at long last have a superior tool to study how black holes, notorious for pulling matter in, can accelerate jets of gas outward at fantastic speeds. Physicists are able to study ... Apr 2, 2014 · Enrico Fermi was born in Rome, Italy, on September 29, 1901, the third child of Alberto and Ida de Gattis Fermi. Ida was a remarkable woman, trained as a teacher, highly intelligent and a major ... Experimental confirmation of a prediction is merely a measurement. An experiment disproving a prediction is a discovery. Enrico Fermi. Science, Discovery, Engineering. 84 Copy quote. It is not good to try to stop knowledge from going forward. Ignorance is never better than knowledge. Enrico Fermi. Positive, Ignorance, Science. Feb 10, 2016 · Fermi Overview. The Fermi Gamma-ray Space Telescope is an international and multi-agency space mission that studies the cosmos in the energy range 10 keV - 300 GeV. Several successful exploratory missions in gamma-ray astronomy led to the Energetic Gamma Ray Experiment Telescope (EGRET) instrument on the Compton Gamma Ray Observatory (CGRO). Fermilab's vision and mission. Fermilab is America's particle physics and accelerator laboratory. Our vision is to solve the mysteries of matter, energy, space and time for the benefit of all. We strive to: lead the world in neutrino science with particle accelerators. lead the nation in the development of particle colliders and their use for ...Fermi announced that this was much too low, and the real number was about one in ten. What followed was a sparring match as both men criticized and revised their rough estimates of the likelihood ...Preparing these data for analysis depends on the type of analysis you wish to perform (e.g. point source, extended source, GRB spectral analysis, timing analysis, etc). The different cuts to the data are described in detail in the Cicerone . Data preparation consists of two steps. ( gtselect ): Used to make cuts based on columns in the event ...The Fermi energy of a (n-doped) semiconductor is typically rather close to the band edge. In fact, by controlling the doping, it can be made it as close to the band edge as we want. On the other hand, in metal, where the conduction band is partially filled with electrons, the Fermi energy is necessarily quite big.Enrico Fermi in 1949, to explain heating of particles in cosmic rays. Fermi studied charged particles being reflected by the mov-ing interstellar magnetic field and either gaining or losing energy, depending on whether the ”magnetic mirror” is approaching or re-ceding. In a typical environment, Fermi argued, the probability of Enrico Fermi på 1940-talet. Enrico Fermi, född 29 september 1901 i Rom, död 28 november 1954 i Chicago, USA, var en italiensk fysiker som 1938 belönades med Nobelpriset i fysik. Han är bland annat känd för att ha varit central inom utvecklingen av kärnkraften och atombomben. Han blev amerikansk medborgare i juli 1944.Fermi problem. In physics or engineering education, a Fermi problem (or Fermi quiz, Fermi question, Fermi estimate ), also known as a order-of-magnitude problem (or order-of-magnitude estimate, order estimation ), is an estimation problem designed to teach dimensional analysis or approximation of extreme scientific calculations, and such a ... The Enrico Fermi Nuclear Generating Station is a nuclear power plant on the shore of Lake Erie near Monroe, in Frenchtown Charter Township, Michigan on approximately 1,000 acres (400 ha). All units of the plant are operated by the DTE Energy Electric Company and owned (100 percent) by parent company DTE Energy.Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a United States Department of Energy national laboratory specializing in high-energy particle physics.Since 2007, Fermilab has been operated by the Fermi Research Alliance (FRA), a joint venture of the University of Chicago, and the Universities Research Association (URA); although in ...Daily Data Products. The following data products are created daily by the LISOC and sent to the FSSC. The products are create after each downlink from the spacecraft (6-8 per day). Large number of parameters describing a large subset of the events telemetered to the ground (many did not result from photons).Enrico Fermi, (born Sept. 29, 1901, Rome, Italy—died Nov. 28, 1954, Chicago, Illinois, U.S.), Italian-born American scientist who was one of the chief architects of the nuclear age.The Enrico Fermi Presidential Award was subsequently established in 1956 as a memorial to the legacy of this Italian-born naturalized American citizen and 1938 Nobel Laureate in physics, who achieved the first nuclear chain reaction. Highly accomplished in both theory and experiment, Enrico Fermi is widely regarded as one of the leading ...Tracy Marc, Fermilab, [email protected], 224-290-7803. The U.S. Department of Energy has formally approved the start of full construction for the PIP-II project, an essential upgrade to the accelerator complex at Fermi National Accelerator Laboratory. The heart of the project is a powerful new superconducting linear accelerator that will enable ...Fermi, who won the Nobel Prize in 1938, also worked in quantum mechanics and particle physics, making him an ideal candidate for an elementary name. The element was almost named centurium, however. In 1953, scientists at the Nobel Institute in Stockholm had produced fermium 250 by bombarding uranium with oxygen nuclei.This distance is sometimes called a fermi and was so named in honour of Italian naturalized to American physicist Enrico Fermi, as it is a typical length-scale of nuclear physics. Definition and equivalents. 1000000 zeptometres = 1 femtometre = 1 fermi = 0.000001 nanometre = 10 −15 metres. 1 000 000 000 000 femtometres = 1 millimetre.Fermi problem. In physics or engineering education, a Fermi problem (or Fermi quiz, Fermi question, Fermi estimate ), also known as a order-of-magnitude problem (or order-of-magnitude estimate, order estimation ), is an estimation problem designed to teach dimensional analysis or approximation of extreme scientific calculations, and such a ... The Fermi data released to the scientific community is governed by the data policy. The released instrument data for the GBM, along with LAT source lists, can be accessed through the Browse interface specific to Fermi. LAT photon data can be accessed through the LAT data server . The FITS files can also be downloaded from the Fermi FTP site.Gamma-ray Burst Monitor (GBM) The GBM includes two sets of detectors: twelve sodium iodide (NaI) scintillators, each 12.7 cm in diameter by 1.27 cm thick, and two cylindrical bismuth germanate (BGO) scintillators, each 12.7 cm in diameter and 12.7 cm in height. The NaI detectors are sensitive in the lower end of the energy range, from a few keV ...the Fermi surface, and should be regarded as yielding only qual-itative results. 2.2.2 T6= 0 , Fermi StatisticsSep 22, 2020 · Fermilab's 6,800-acre site is located in Batavia, Illinois, and is managed by the Fermi Research Alliance LLC for the U.S. Department of Energy Office of Science. FRA is a partnership of the University of Chicago and Universities Research Association Inc., a consortium of 89 research universities. The analysis threads are part of a hierarchical documentation set offered in support of Fermi data analysis. The threads are basically "cookbook" analysis examples which could for example be followed verbatim and then repeated but substituting data sets and observational scenarios of your own choosing. The other components of the documentation ...The Fermi paradox ponders why Earth has not been visited by aliens, while the Drake equation tries to estimate the number of intelligent civilizations in our galaxy. Both concepts involve a lot of uncertainty, because when it comes to extraterrestrial life, there’s a lot we don’t know. “These two tools are foundational in the sense that ...However, in July 1968, DTE Energy announced plans to build a second nuclear reactor. This one would be a General Electric boiling water reactor. Fermi II had the odds stacked against it, while it didn't have the same issues that Fermi I did. Citizen activists still had a bad taste in their mouths and were quick to turn against Fermi II as well. This distance is sometimes called a fermi and was so named in honour of Italian naturalized to American physicist Enrico Fermi, as it is a typical length-scale of nuclear physics. Definition and equivalents. 1000000 zeptometres = 1 femtometre = 1 fermi = 0.000001 nanometre = 10 −15 metres. 1 000 000 000 000 femtometres = 1 millimetre.Feb 24, 2023 · Fermi announced that this was much too low, and the real number was about one in ten. What followed was a sparring match as both men criticized and revised their rough estimates of the likelihood ... Fermi announced that this was much too low, and the real number was about one in ten. What followed was a sparring match as both men criticized and revised their rough estimates of the likelihood ...IFermi is a Python (3.6+) library and set of command-line tools for the generation, analysis, and visualisation of Fermi surfaces and Fermi slices. The goal of the library is to provide fully featured FermiSurface and FermiSlice objects that allow for easy manipulation and analysis. The main features include:

The young Enrico Fermi. Enrico Fermi was born on 29 September 1901 in Rome to a family with no scientific traditions. His passion for natural sciences, and in particular for physics, was stimulated and guided in his school years by an engineer and family friend, Adolph Amidei, who recognized Fermi’s exceptional intellectual abilities and suggested admission to Pisa’s Scuola Normale Superiore.. Antonetti

fermi

the Fermi surface, and should be regarded as yielding only qual-itative results. 2.2.2 T6= 0 , Fermi Statistics(1901-1954) Who Was Enrico Fermi? Enrico Fermi's early research was in general relativity and quantum mechanics, but he soon focused on the newer field of nuclear physics. He won the Nobel...The goal is to get a sense of approximate size. This type of problem is known as a Fermi Problem, named for physicist Enrico Fermi. Enrico Fermi was known for his contribution to the Manhattan Project during World War II. He was a professor and research scientist at Columbia University and the University of Chicago.Sep 9, 2021 · The Fermi paradox ponders why Earth has not been visited by aliens, while the Drake equation tries to estimate the number of intelligent civilizations in our galaxy. Both concepts involve a lot of uncertainty, because when it comes to extraterrestrial life, there’s a lot we don’t know. “These two tools are foundational in the sense that ... Tracy Marc, Fermilab, [email protected], 224-290-7803. The U.S. Department of Energy has formally approved the start of full construction for the PIP-II project, an essential upgrade to the accelerator complex at Fermi National Accelerator Laboratory. The heart of the project is a powerful new superconducting linear accelerator that will enable ...Fermi, Unit 2. Location: 25 MI NE of Toledo, OH, in Region III Operator: DTE Electric Company Operating License: Issued - 07/15/1985, Expires - 03/20/2045Enrico Fermi ( Italian: [enˈriːko ˈfermi]; 29 September 1901 – 28 November 1954) was an Italian and later naturalized American physicist, renowned for being the creator of the world's first nuclear reactor, the Chicago Pile-1, and a member of the Manhattan Project. He has been called the "architect of the nuclear age " [1] and the ... Fermi 2 Power Plant began commercial operation in 1988 and has since produced more than 200 billion kilowatt hours of electricity for DTE Energy customers. In 2001, Fermi 2 Power Plant was the first nuclear power plant in the state to achieve Clean Corporate Citizen (C3) status. The Michigan Department of Environmental Quality's voluntary C3 ... Tracy Marc, Fermilab, [email protected], 224-290-7803. The U.S. Department of Energy has formally approved the start of full construction for the PIP-II project, an essential upgrade to the accelerator complex at Fermi National Accelerator Laboratory. The heart of the project is a powerful new superconducting linear accelerator that will enable ...Apr 2, 2014 · Enrico Fermi was born in Rome, Italy, on September 29, 1901, the third child of Alberto and Ida de Gattis Fermi. Ida was a remarkable woman, trained as a teacher, highly intelligent and a major ... Enrico Fermi Biographical . E nrico Fermi was born in Rome on 29th September, 1901, the son of Alberto Fermi, a Chief Inspector of the Ministry of Communications, and Ida de Gattis. He attended a local grammar school, and his early aptitude for mathematics and physics was recognized and encouraged by his father’s colleagues, among them A. Amidei. The Fermi paradox ponders why Earth has not been visited by aliens, while the Drake equation tries to estimate the number of intelligent civilizations in our galaxy. Both concepts involve a lot of uncertainty, because when it comes to extraterrestrial life, there’s a lot we don’t know. “These two tools are foundational in the sense that ...The newly discovered eROSITA X-ray bubbles in the Milky Way’s centre, together with the Fermi bubbles and microwave haze, may be explained by a single episode of central supermassive-black-hole ...Preparing these data for analysis depends on the type of analysis you wish to perform (e.g. point source, extended source, GRB spectral analysis, timing analysis, etc). The different cuts to the data are described in detail in the Cicerone . Data preparation consists of two steps. ( gtselect ): Used to make cuts based on columns in the event ....

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