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Ten ORNL scientists among world’s most highly cited researchers

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Oak Ridge National Laboratory (Submitted photo)

Ten scientists from Oak Ridge National Laboratory are among the world’s most highly cited researchers, according to a bibliometric analysis conducted by the scientific publication analytics firm Clarivate. 
 
The annual list identifies researchers who demonstrated significant influence in their field through the publication of multiple highly cited papers during the last decade. These researchers authored publications that rank in the top 1% by citations for field and publication year in the Web of Science citation index. 
 
“Researchers at ORNL are leading the advancement of scientific knowledge in multiple fields,” ORNL Director Thomas Zacharia said in a press release. “This recognition demonstrates that the laboratory and our scientists are engaged in cutting-edge research and development to solve some of the world’s biggest challenges.” 
 
The ORNL scientists listed are:

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Summit at ORNL still No. 2 supercomputer

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The Summit supercomputer, an IBM system that is the world’s second-most powerful, is pictured above at Oak Ridge National Laboratory. (Photo courtesy Katie Bethea/ORNL)


 

The Summit supercomputer at Oak Ridge National Laboratory remained the fastest system in the United States and the second-most powerful in the world in the biannual TOP500 list released Monday.

Fugaku in Kobe, Japan, remained No. 1, where it has been since June 2020. The 442-petaflop system has been at the top of the list four consecutive times.

Summit, an IBM system, was the world’s most powerful supercomputer from June 2018 to November 2019, when the U.S. Department of Energy had the two fastest systems in the world. DOE still has the second and third most powerful supercomputers, Summit at number two and Sierra at Lawrence Livermore National Laboratory in California at number three.

Fugaku is installed at the Riken Center for Computational Science. It was co-developed by Riken and Fujitsu, and it has 7,630,848 cores. It is based on Fujitsu’s custom ARM A64FX processor, TOP500 said. Fugaku uses a Fujitsu interconnect known as Tofu D to transfer data between nodes.

TOP500 said Fugaku’s 442-petaflop performance on a benchmark test makes it three times as powerful as Summit, which has 2,414,592 cores. The TOP500 list uses a benchmark test to rank the world’s most powerful supercomputers.

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The Summit supercomputer, an IBM system that is the world’s second-most powerful, is pictured above at Oak Ridge National Laboratory. (Photo courtesy Katie Bethea/ORNL)


 

The Summit supercomputer at Oak Ridge National Laboratory remained the fastest system in the United States and the second-most powerful in the world in the biannual TOP500 list released Monday.

Fugaku in Kobe, Japan, remained No. 1, where it has been since June 2020. The 442-petaflop system has been at the top of the list four consecutive times.

Summit, an IBM system, was the world’s most powerful supercomputer from June 2018 to November 2019, when the U.S. Department of Energy had the two fastest systems in the world. DOE still has the second and third most powerful supercomputers, Summit at number two and Sierra at Lawrence Livermore National Laboratory in California at number three.

Fugaku is installed at the Riken Center for Computational Science. It was co-developed by Riken and Fujitsu, and it has 7,630,848 cores. It is based on Fujitsu’s custom ARM A64FX processor, TOP500 said. Fugaku uses a Fujitsu interconnect known as Tofu D to transfer data between nodes.

TOP500 said Fugaku’s 442-petaflop performance on a benchmark test makes it three times as powerful as Summit, which has 2,414,592 cores. The TOP500 list uses a benchmark test to rank the world’s most powerful supercomputers.

The rest of this story is available if you are a member: a subscriber, advertiser, or contributor to Oak Ridge Today. Already a member? Great! Thank you! Sign in here. Not a member? No problem! Subscribe here: Basic

Pro

Temporary

If you prefer to send a check, you may do so by mailing one to: Oak Ridge Today P.O. Box 6064 Oak Ridge, TN 37831 We also have advanced subscription options. You can see them here. We also accept donations. You can donate here. A donation of $50 or more will make you eligible for a subscription. Thank you for reading Oak Ridge Today. We appreciate your support!

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Lecture to discuss ORNL work for NASA’s space nuclear thermal propulsion program

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Thomas Harrison

Thomas Harrison, a group leader at Oak Ridge National Laboratory, will give an overview this evening of the work that ORNL performs for NASA’s space nuclear thermal propulsion (NTP) program, a press release said.

ORNL performs research on materials, fuels, instrumentation and control components and techniques, and systems analysis, all of which are vital to the successful deployment of NTP, the press release said. Harrison will also describe some of the challenges facing the technology and the methods that ORNL researchers are using to overcome them.

Harrison is currently the Advanced Nuclear System Safety and Licensing Group Leader at ORNL, the press release said. [Read more…]

NASA selects ORAU for postdoc program

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Part of the ORAU campus in central Oak Ridge is pictured above on May 29, 2017. (File photo by John Huotari/Oak Ridge Today)

NASA has selected Oak Ridge Associated Universities to provide the agency with administrative support and coordination of research opportunities between NASA’s mission directorates and centers across the agency.

The NASA Postdoctoral Program 2 (NPP-2) contract is a cost-plus-fixed-fee contract with a maximum potential value of approximately $129.7 million. The one-year base performance period begins September 9, 2021, and it is followed by four one-year options, which would end September 8, 2026, NASA said in a press release.

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‘Great Conjunction’ of Jupiter, Saturn in night sky this evening

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Jupiter and Saturn will appear to come together in the night sky this evening, as the two bright planets closely align and Jupiter overtakes Saturn, from our vantage point, in its orbit around the Sun.

It’s an astronomical event known as the “Great Conjunction.” It’s also popularly known as the “Christmas Star,” according to NASA.

Tonight (Monday, December 21) will be the culmination of the planetary conjunction.

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Japanese supercomputer displaces ORNL’s Summit as world’s most powerful

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A Japanese supercomputer has displaced the Summit supercomputer, pictured above at Oak Ridge National Laboratory, as the world’s most powerful. Summit is a 200-petaflop IBM system. (Photo courtesy Katie Bethea/ORNL)

Note: This story was last updated at 3 p.m. June 24.

A Japanese supercomputer has displaced the Summit supercomputer at Oak Ridge National Laboratory as the world’s most powerful and bumped other U.S. and Chinese machines down one spot on a semiannual list of the fastest systems.

Summit had been ranked the world’s most powerful supercomputer on the semiannual TOP500 list since June 2018. It was bumped to number two when the new TOP500 list was released Monday.

The new top system is installed in Kobe, Japan, and it is named Fugaku. In a high-performance test, it performed at 415.5 petaflops. A petaflop is a quadrillion floating-point operations per second.

Fugaku’s performance was 2.8 times better than Summit’s, according to TOP500. Summit delivered 148.8 petaflops on the high-performance test.

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ORNL researcher helps discover new species of cave snail

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Researchers discovered the Tennessee cavesnail, Antrorbis tennesseensis, in caves near Oak Ridge National Laboratory. The snail is less than two millimeters long. (Photo credit: ORNL/Nathaniel Shoobs and Matthew Niemiller)

A researcher at Oak Ridge National Laboratory helped discover a small cave snail.

The new snail species has been named the Tennessee cavesnail, or Antrorbis tennesseensis. Its name honors the state where it was found and the fact that several researchers involved in its discovery are affiliated with the University of Tennessee. A paper describing and naming the species was published in December.

The snail, which is less than two millimeters long, was found in two caves in Roane County a few miles south of the Oak Ridge Reservation. The reservation includes ORNL and parts of the city of Oak Ridge.

The snail is found on or under rocks far inside the caves, usually in streams that aren’t too muddy or silty, ORNL said. Researchers recommended that the species be listed as endangered.

The ORNL researcher is Evin Carter. He is a research associate and wildlife ecologist at ORNL, which is a U.S. Department of Energy laboratory. With only a handful of surveys completed so far, Carter has plans to survey the 40 or so other caves on the Oak Ridge Reservation, ORNL said.

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With key isotopes depleted, DOE plans production center at ORNL

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The U.S. Department of Energy has proposed an isotope production and research center at Oak Ridge National Laboratory that could be important for medical, national security, and research projects.

In a budget request released in February, DOE said its supply of certain key enriched stable isotopes has been depleted, making the United States more dependent upon foreign imports for enriched stable isotopes. Isotopes are forms of an element that have the same number of protons but different number of neutrons in their nuclei.

DOE said the demand for enriched stable isotopes continues to grow substantially, including for the medical, national security, and fundamental research projects.

The new center at ORNL, the U.S. Stable Isotope Production and Research Center, would reduce the nation’s dependence upon foreign countries for those isotopes, DOE said.

DOE approved the mission need for the facility in January 2019. Although the cost range could change, the current project estimate is between $175 million and $298 million.

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Next major decision anticipated for second target station at SNS

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SNS-Second-Target-Station
More than 200 scientists from around the world met from Oct. 27 to 29, 2015, at the U.S. Department of Energy’s Oak Ridge National Laboratory to provide input on the scientific instruments that would be installed at a proposed Second Target Station, or STS, pictured above at center right at the Spallation Neutron Source. (File aerial photo and overlay by ORNL)

The next decision about the second target station at the Spallation Neutron Source could be made later this year or in the first quarter of next year, U.S. Energy Secretary Dan Brouillette told a House subcommittee on Thursday. The next decision would include an alternative selection and a cost range.

The $1.4 billion SNS is located on Chestnut Ridge at Oak Ridge National Laboratory. It provides neutrons for research.

The second target station has been part of SNS plans for many years. It’s one of two upgrades being pursued at SNS. The other is a proton power upgrade, which is expected to double the power of SNS’s proton beam from 1.4 megawatts to 2.8 megawatts.

The second target station has a current estimated cost range of $800 million to $1.5 billion. The U.S. Department of Energy said the second target is needed more than a decade ago, in January 2009. The second target station would use a narrow proton beam and a compact, rotating, water-cooled tungsten target. It is expected to fill gaps in materials research that require the combined use of intense, cold (longer wavelength) neutrons and instruments that can help analyze complex materials. It could have up to 22 experimental beamlines.

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Fusion research: ORNL chosen for plasma materials experiment facility

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Scientists use a laser to align the plasma created at the Proto-MPEX (Materials Plasma Exposure Experiment) machine at Oak Ridge National Laboratory. (Photo credit: Ted Biewer/ORNL, U.S. Department of Energy)

Oak Ridge National Laboratory has been chosen as the site of an experimental facility to test materials that would withstand the harsh conditions of the plasmas created in fusion devices, which, researchers hope, could eventually provide carbon-free energy to people around the world.

The proposed facility, the Materials Plasma Exposure Experiment facility, or MPEX, has an estimated cost range between $87 million and $175 million. It would be in an existing facility in an area at ORNL known as the Energy Systems Test Complex.

Fusion devices would use the same reactions that power the sun. Temperatures inside a fusion reactor could reach millions of degrees.

Scientists are studying materials that could withstand the conditions inside fusion reactors by exposing them to prototypical plasma conditions. Plasma, the heated matter created in a fusion device, has high-energy neutrons, electrons, and ions. MPEX would study materials that face the plasma. Finding materials capable of withstanding the harsh environment remains a major hurdle to using fusion to produce energy.

A critical decision for the MPEX facility was completed in early February by the U.S. Department of Energy. ORNL is a DOE Office of Science lab. The critical decision, CD-1, is the second step in the five-step process that DOE uses to manage projects. The CD-1 decision included an alternative selection and a cost range.

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Nature walks scheduled on Oak Ridge Reservation

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Narrow leaved spring beauties are found on the Oak Ridge Reservation. (Submitted photo)

Submitted

On the U.S. Department of Energy’s Oak Ridge Reservation, located in East Tennessee, more than 1,100 vascular plants, 72 fish, 34 mammals, and more than 200 bird species have been observed.

This year, the public is invited to nine nature walks designed to highlight not only the rich flora and fauna diversity of the reservation, but also to demonstrate the work being done to sustainably manage and conserve this resource. Walks will take place on several locations across the Oak Ridge Reservation beginning in late winter through mid-summer. No pets, please.

Reservations for the following events must be made in advance by noon the Thursday prior to each walk by contacting Tracy Clem at (865) 574-5151 or [email protected] More information about these walks is available by contacting Trent Jett at (865) 574-9188 or [email protected]

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Tamke-Allan Observatory has public stargazing Saturday

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Linda Fippin
Linda Fippin

Tamke-Allan Observatory at Roane State Community College continues its Summer Public Stargazing with an examination of light and light pollution on Saturday, August 3.

The gates open at 7:30 p.m. Saturday, and a public lecture will be presented at 8 p.m. by guest lecturer and retired clinical researcher Linda Fippin.

“For the vast majority of human history, nighttime lighting was limited to the hearth fire,” a press release said. “As villages, towns, and eventually cities developed, lighting was still limited to oil lamps and candles. Gas lighting was not invented until the late 18th century, and electric street lights have only been in use for about 140 years. Nighttime lighting has many benefits, but excessive and inappropriate use has led to light pollution, which not only has negative effects on people, quality of life, and the natural environment, but also wastes energy resources. This talk will cover a brief history of nighttime lighting, the effects of light pollution, and what can be done to lessen them.”

[Read more…]

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