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Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Rare Earth Tungsten Bronzes  

Science Journals Connector (OSTI)

Rare Earth Tungsten Bronzes ... Trivalent Rare Earth Ion Conduction in the Rare Earth Tungstates with the Sc2(WO4)3-Type Structure ... Trivalent Rare Earth Ion Conduction in the Rare Earth Tungstates with the Sc2(WO4)3-Type Structure ...

Werner Ostertag

1966-05-01T23:59:59.000Z

2

POWDER METALLURGICAL PROCESSING OF MAGNETOSTRICTIVE MATERIALS BASED ON RARE EARTH-IRON INTERMETALLIC COMPOUNDS  

E-Print Network (OSTI)

R « any of several rare earth elements) was discovered. Toobserved for pure rare earth elements. This and the strong

Malekzadeh, Manoochehr

2011-01-01T23:59:59.000Z

3

Rare Earth Elements:  

Science Journals Connector (OSTI)

...Energy-efficient compact fluorescent lamps (CFLs) use phosphor...LEDs), and compact fluorescent lamps (CFLs) all utilize...conventional incandescent light bulbs with CFLs in numerous...rare earth industry and led to significant price...previous year. This led to significant price...

Gareth P. Hatch

4

Ames Lab 101: Rare Earths  

ScienceCinema (OSTI)

"Mr. Rare Earth," Ames Laboratory scientist Karl Gschneidner Jr., explains the importance of rare-earth materials in many of the technologies we use today -- ranging from computers to hybrid cars to wind turbines. Gschneidner is a world renowned rare-earths expert at the U.S. Department of Energy's Ames Laboratory.

Gschneidner, Karl

2012-08-29T23:59:59.000Z

5

Rare-Earth Research Meeting  

Science Journals Connector (OSTI)

Rare-Earth Research Meeting ... The 27th Rare Earth Research Conference will take place at the Village at Squaw Valley in Olympic Valley, Calif.—the site of the 1960 Winter Olympic Games—on June 22–26, 2014. ... Rare-earth element research spans several disciplines and brings together chemists, engineers, physicists, and materials scientists. ...

SOPHIE ROVNER

2013-12-23T23:59:59.000Z

6

Orbital-resolved spin model for thermal magnetization switching in rare-earth-based ferrimagnets  

Science Journals Connector (OSTI)

The switching of rare-earth-based ferrimagnets triggered by thermal excitation is investigated on the basis of an atomistic spin model beyond the rigid-spin approximation, distinguishing magnetic moments due to electrons in d and f orbitals of the rare earth. It is shown that after excitation of the conduction electrons a transient ferromagneticlike state follows from a dissipationless spin dynamics where energy and angular momentum are distributed between the two sublattices. The final relaxation can then lead to a new state with the magnetization switched with respect to the initial state. The time scale of the switching event is to a large extent determined by the exchange interaction between the two sublattices.

S. Wienholdt; D. Hinzke; K. Carva; P. M. Oppeneer; U. Nowak

2013-07-24T23:59:59.000Z

7

Rare-Earth-Free Nanostructure Magnets: Rare-Earth-Free Permanent Magnets for Electric Vehicle Motors and Wind Turbine Generators: Hexagonal Symmetry Based Materials Systems Mn-Bi and M-type Hexaferrite  

SciTech Connect

REACT Project: The University of Alabama is developing new iron- and manganese-based composite materials for use in the electric motors of EVs and renewable power generators that will demonstrate magnetic properties superior to today’s best rare-earth-based magnets. Rare earths are difficult and expensive to refine. EVs and renewable power generators typically use rare earths to make their electric motors smaller and more powerful. The University of Alabama has the potential to improve upon the performance of current state-of-the-art rare-earth-based magnets using low-cost and more abundant materials such as manganese and iron. The ultimate goal of this project is to demonstrate improved performance in a full-size prototype magnet at reduced cost.

None

2012-01-01T23:59:59.000Z

8

Silicon Shovels for Rare-Earth Solutions  

Office of Science (SC) Website

the uses for rare-earths, but the mined and processed totals are falling short. Green energy technology needs rare earth materials for wind turbines, rechargeable...

9

DOE Science Showcase - Rare Earth Metal Research from DOE Databases |  

Office of Scientific and Technical Information (OSTI)

Rare Earth Metal Research from DOE Databases Rare Earth Metal Research from DOE Databases Information Bridge Energy Citations Database Highlighted documents of Rare Earth Metal research in DOE databases Information Bridge - Corrosion-resistant metal surfaces DOE R&D Project Summaries - Structural and magnetic studies on heavy rare earth metals at high pressures using designer diamonds Energy Citations Database - Intermultiplet transitions in rare-earth metals DOE Green Energy - LaNi.sub.5 is-based metal hydride electrode in Ni-MH rechargeable cells Science.gov - H.R.4866 - Rare Earths Supply-Chain Technology and Resources Transformation Act of 2010 WorldWideScience.org - China produces most of the world's rare earth metals DOepatents - Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction

10

Rare Earth Elements:  

Science Journals Connector (OSTI)

...were also extracted as by-products of uranium mining from conglomerates at Elliot Lake...toxic waste lakes, acrid air, and high cancer rates in the Bayan Obo area. The environmental...Major and trace element composition of the depleted MORB mantle (DMM). Earth and Planetary...

Anton R. Chakhmouradian; Frances Wall

11

Good Earths and Rare Earths | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Good Earths and Rare Earths Good Earths and Rare Earths Good Earths and Rare Earths April 20, 2011 - 6:17pm Addthis Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science What does this mean for me? Rare earth elements -- dysprosium, neodymium, terbium, europium and yttrium -- are essential to a wide range of green energy technologies ranging from windmills to electric vehicles One of their primary uses is in permanent magnets, which amount to over a $4 billion global industry Ames Laboratory recently discovered a way to make these magnets cheaper and greener and signed a cooperative research and development agreement with Molycorp Inc. -- the Western hemisphere's only producer of rare-earth oxides. China holds about 36 percent of world's rare-earth reserves, (compared to 13 percent in the U.S.), but it currently produces 95 percent

12

Rare Earth Metals and Alloys | Ames Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Mpc » Rare Earth Metals and Alloys Mpc » Rare Earth Metals and Alloys Rare Earth Metals and Alloys Terbium (Tb) and Cerium (Ce) phosphors in your computer screen allow you to see GREEN. Europium (Eu) is the source of the RED light and BLUE emitted by our display. The Ames Laboratory has been actively involved in the preparation of very pure rare earth metals since the early 1940's when Dr. Frank H. Spedding and his group of pioneers developed the ion-exchange process, a technique that separates the "fraternal fifteen" plus yttrium and scandium. As a result of this and subsequent work, high-purity oxides are available from which high-purity rare earth metals can be prepared. In most cases, the rare earth oxides are first converted to their respective fluorides and are then reduced metallothermicaly on a kilogram

13

Improved method for preparing rare earth sesquichalcogenides  

DOE Patents (OSTI)

An improved method for the preparation of high purity rare earth sesquichalcogenides is described. The rare earth, as one or more pieces of the metal, is sealed under a vacuum with a stoichiometric amount of sulfur or selenium and a small amount of iodine into a quartz reaction vessel. The sealed vessel is then heated to above the vaporization temperature of the chalcogen and below the melting temperature of the rare earth metal and maintained until the product has been formed. The iodine is then vaporized off leaving a pure product. The rare earth sulfides and selenides thus formed are useful as semiconductors and as thermoelectric generators. 3 tables.

Takeshita, T.; Beaudry, B.J.; Gschneidner, K.A. Jr.

1982-04-14T23:59:59.000Z

14

Rare-Earth-Free Traction Motor: Rare Earth-Free Traction Motor for Electric Vehicle Applications  

SciTech Connect

REACT Project: Baldor will develop a new type of traction motor with the potential to efficiently power future generations of EVs. Unlike today’s large, bulky EV motors which use expensive, imported rare-earth-based magnets, Baldor’s motor could be light, compact, contain no rare earth materials, and have the potential to deliver more torque at a substantially lower cost. Key innovations in this project include the use of a unique motor design, incorporation of an improved cooling system, and the development of advanced materials manufacturing techniques. These innovations could significantly reduce the cost of an electric motor.

None

2012-01-01T23:59:59.000Z

15

Rare Earth Phosphate Glass and Glass-Ceramic Proton Conductors  

E-Print Network (OSTI)

300-500°C. Doping rare earth phosphate glasses with Ce, andRare Earth Phosphate Glass and Glass-Ceramic Protonconductivity of alkaline-earth doped rare earth phosphate

De Jonghe, Lutgard C.

2010-01-01T23:59:59.000Z

16

Ames Lab 101: Rare-Earth Recycling  

SciTech Connect

Recycling keeps paper, plastics, and even jeans out of landfills. Could recycling rare-earth magnets do the same? Perhaps, if the recycling process can be improved. Scientists at the U.S. Department of Energy's Ames Laboratory are working to more effectively remove the neodymium, a rare earth, from the mix of other materials in a magnet.

Ryan Ott

2012-09-05T23:59:59.000Z

17

Microstructural investigations of rare-earth transition-metal-based magnetocaloric materials for near-room-temperature applications  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LOGO LOGO Spomenka Kobe, Paul McGuiness, Boris Saje Jožef Stefan Institute Rare-Earth Permanent Magnets in Europe KOLEKTOR *China's Complete Control of Global High-Tech Magnet Industry Rare-earth minerals are used in: rechargeable batteries (in camcorders), cell phones, PDAs, laptop computers and other portable devices.. wind turbines, drinking water filters, petrochemical catalysts, polishing powders, hydrogen storage, fluorescent lighting, flat panels, color televisions, glass, ceramics and automotive catalysts. fiberoptics, dental and surgical lasers, MRI systems, as medical contrast agents, in medical isotopes and in positron emission tomography scintillation detectors. magnetic refrigeration rechargeable batteries used in hybrid vehicles permanent magnets

18

Ames Lab 101: Rare-Earth Magnets  

ScienceCinema (OSTI)

Senior Scientist, Bill McCallum, briefly discusses rare-earth magnets and their uses and how Ames Lab is research new ways to save money and energy using magnets.

McCallum, Bill

2012-08-29T23:59:59.000Z

19

Are Earths Rare? Perhaps Not  

NLE Websites -- All DOE Office Websites (Extended Search)

where liquid water is permitted on the surface of a planet. The authors find that 22% of Sun-like stars harbor a planet between one and two times the size of Earth in the habitable...

20

Acid-Based Synthesis of Monodisperse Rare-Earth-Doped Colloidal SiO2 Spheres  

E-Print Network (OSTI)

display narrow-line intra-4f transi- tions that are first order independent of the local environment method to dope SiO2 particles with RE ions via an acid-based wet chemical synthesis route by adding of the particles are studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM

Polman, Albert

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

DOE launches rare earth metals research hub  

NLE Websites -- All DOE Office Websites (Extended Search)

ATL011113_hub ATL011113_hub 01/11/2013 DOE launches rare earth metals research hub Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Printer-friendly Europium, a rare earth element that has the same relative hardness of lead, is used to create fluorescent lightbulbs. With no proven substitutes, europium is considered critical to the clean energy economy. Photo courtesy of the Ames Laboratory. High Resolution Image The Department of Energy has launched a research hub that focuses on solutions to the domestic shortages of rare earth metals and other materials critical for U.S. energy security. Housed at Ames Laboratory in Iowa, Lawrence Livermore has been involved in establishing this Energy Innovation Hub since its conception more than two years ago. In 2010, on behalf of DOE, LLNL hosted the first U.S.-Japan

22

Rapporteur's Report - workshop on rare earth elements  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Trans-Atlantic Workshop on Rare Earth Elements and Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Materials for a Clean Energy Future Hosted by the MIT Energy Initiative, cambridge, Massachusetts december 3, 2010 Introduction The objective of the workshop was to exchange views and information on the material security challenges of rare earths and other elements critical for clean energy generation and use. This includes the description of current research topics around the supply chain and end uses, and to identify opportunities for Trans-Atlantic research cooperation. The workshop consisted of a series of brief presentations by researchers in the US and Europe, followed by a discussion of possible areas of collaboration proposed by the co-chairs. A list of the presentations and the agenda for the day is appended with this document.

23

Growth and characterization of rare-earth monosulfides for cold cathode applications  

E-Print Network (OSTI)

of chalco- genides of the rare-earth elements.4,5 The possibility was analyzed theoretically basedGrowth and characterization of rare-earth monosulfides for cold cathode applications Y. Modukuru, J phonons at 261 284 and 100 92 cm 1 with LaS NdS , respectively. These rare-earth monosulfides offer

Boolchand, Punit

24

Replacing the Rare Earth Intellectual Capital  

SciTech Connect

The rare earth crisis slowly evolved during a 10 to 15 year period beginning in the mid-1980s, when the Chinese began to export mixed rare earth concentrates. In the early 1990s, they started to move up the supply chain and began to export the individual rare earth oxides and metals. By the late 1990s the Chinese exported higher value products, such as magnets, phosphors, polishing compounds, catalysts; and in the 21st century they supplied finished products including electric motors, computers, batteries, liquid-crystal displays (LCDs), TVs and monitors, mobile phones, iPods and compact fluorescent lamp (CFL) light bulbs. As they moved to higher value products, the Chinese slowly drove the various industrial producers and commercial enterprises in the US, Europe and Japan out of business by manipulating the rare earth commodity prices. Because of this, the technically trained rare earth engineers and scientists who worked in areas from mining to separations, to processing to production, to manufacturing of semifinished and final products, were laid-off and moved to other fields or they retired. However, in the past year the Chinese have changed their philosophy of the 1970s and 1980s of forming a rare earth cartel to control the rare earth markets to one in which they will no longer supply the rest of the world (ROW) with their precious rare earths, but instead will use them internally to meet the growing demand as the Chinese standard of living increases. To this end, they have implemented and occasionally increased export restrictions and added an export tariff on many of the high demand rare earth elements. Now the ROW is quickly trying to start up rare earth mines, e.g. Molycorp Minerals in the US and Lynas Corp. in Australia, to cover this shortfall in the worldwide market, but it will take about five years for the supply to meet the demand, even as other mines in the ROW become productive. Unfortunately, today there is a serious lack of technically trained personnel to bring the entire rare earth industry, from mining to original equipment manufacturers (OEM), up to full speed in the next few years. Accompanying this decline in technical expertise, innovation and new products utilizing rare earth elements has slowed dramatically, and it may take a decade or more to recapture America's leading role in technological advancements of rare earth containing products. Before the disruption of the US rare earth industry, about 25,000 people were employed in all aspects of the industry from mining to OEM. Today, only about 1,500 people are employed in these fields. The ratio of non-technically trained persons to those with college degrees in the sciences or engineering varies from about 8 to 1 to about 4 to 1, depending on the particular area of the industry. Assuming an average of 6 to 1, the number of college degree scientists and engineers has decreased from about 4,000 to 250 employed today. In the magnetic industry the approximate numbers are: 6,000 total with 750 technically trained people in the 1980s to 500 totally employed today of which 75 have degrees. The paucity of scientists and engineers with experience and/or training in the various aspects of production and commercialization of the rare earths is a serious limitation to the ability of the US to satisfy its own needs for materials and technologies (1) to maintain our military strength and posture, (2) to assume leadership in critical energy technologies, and (3) to bring new consumer products to the marketplace. The lack of experts is of even greater national importance than the halting in the 1990s and the recent restart of the mining/benification/separation effort in the US; and thus governmental intervention and support for at least five to 10 years will be required to ameliorate this situation. To respond quickly, training programs should be established in conjunction with a national research center at an educational institution with a long tradition in multiple areas of rare earth and other critical elements research and technology. This center should

Gschneidner, Jr., Karl

2011-04-01T23:59:59.000Z

25

Iron-Nickel-Based SuperMagnets: Multiscale Development of L10 Materials for Rare Earth-Free Permanent Magnets  

SciTech Connect

REACT Project: Northeastern University will develop bulk quantities of rare-earth-free permanent magnets with an iron-nickel crystal structure for use in the electric motors of renewable power generators and EVs. These materials could offer magnetic properties that are equivalent to today’s best commercial magnets, but with a significant cost reduction and diminished environmental impact. This iron-nickel crystal structure, which is only found naturally in meteorites and developed over billions of years in space, will be artificially synthesized by the Northeastern University team. Its material structure will be replicated with the assistance of alloying elements introduced to help it achieve superior magnetic properties. The ultimate goal of this project is to demonstrate bulk magnetic properties that can be fabricated at the industrial scale.

None

2012-01-01T23:59:59.000Z

26

Spomenka Kobe, Jozef Stefan Institut, Rare Earth Magnets in Europe...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Spomenka Kobe, Jozef Stefan Institut, Rare Earth Magnets in Europe Spomenka Kobe, Jozef Stefan Institut, Rare Earth Magnets in Europe SessionB4Kobe-JosefStefanInstitut.pdf...

27

The Materials Preparation Center - Making Rare Earth Metals - Part 3  

SciTech Connect

Trevor Riedeman, manager of the MPC Rare Earth Materials Section, gives a presentation on the importance of rare earth metals and how they are made at Ames Laboratory. Part 3 of 4.

Riedemann, Trevor

2011-01-01T23:59:59.000Z

28

The Materials Preparation Center - Making Rare Earth Metals - Part 2  

SciTech Connect

Trevor Riedeman, manager of the MPC Rare Earth Materials Section, gives a presentation on the importance of rare earth metals and how they are made at Ames Laboratory. Part 2 of 4.

Riedemann, Trevor

2011-01-01T23:59:59.000Z

29

The Materials Preparation Center - Making Rare Earth Metals - Part 1  

SciTech Connect

Trevor Riedeman, manager of the MPC Rare Earth Materials Section, gives a presentation on the importance of rare earth metals and how they are made at Ames Laboratory. Part 1 of 4.

Riedemann, Trevor

2011-01-01T23:59:59.000Z

30

The Materials Preparation Center - Making Rare Earth Metals - Part 4  

SciTech Connect

Trevor Riedeman, manager of the MPC Rare Earth Materials Section, gives a presentation on the importance of rare earth metals and how they are made at Ames Laboratory. Part 4 of 4.

Riedemann, Trevor

2011-01-01T23:59:59.000Z

31

The Materials Preparation Center - Making Rare Earth Metals - Part 3  

ScienceCinema (OSTI)

Trevor Riedeman, manager of the MPC Rare Earth Materials Section, gives a presentation on the importance of rare earth metals and how they are made at Ames Laboratory. Part 3 of 4.

Riedemann, Trevor

2013-03-01T23:59:59.000Z

32

The Materials Preparation Center - Making Rare Earth Metals - Part 1  

ScienceCinema (OSTI)

Trevor Riedeman, manager of the MPC Rare Earth Materials Section, gives a presentation on the importance of rare earth metals and how they are made at Ames Laboratory. Part 1 of 4.

Riedemann, Trevor

2013-03-01T23:59:59.000Z

33

High efficiency rare-earth emitter for thermophotovoltaic applications  

SciTech Connect

In this work, we propose a rare-earth-based ceramic thermal emitter design that can boost thermophotovoltaic (TPV) efficiencies significantly without cold-side filters at a temperature of 1573?K (1300?°C). The proposed emitter enhances a naturally occurring rare earth transition using quality-factor matching, with a quarter-wave stack as a highly reflective back mirror, while suppressing parasitic losses via exponential chirping of a multilayer reflector transmitting only at short wavelengths. This allows the emissivity to approach the blackbody limit for wavelengths overlapping with the absorption peak of the rare-earth material, while effectively reducing the losses associated with undesirable long-wavelength emission. We obtain TPV efficiencies of 34% using this layered design, which only requires modest index contrast, making it particularly amenable to fabrication via a wide variety of techniques, including sputtering, spin-coating, and plasma-enhanced chemical vapor deposition.

Sakr, E. S.; Zhou, Z.; Bermel, P., E-mail: pbermel@purdue.edu [Birck Nanotechnology Center, School of Electrical and Computer Engineering, Purdue University, 1205 W. State St., West Lafayette, Indiana 47907 (United States)

2014-09-15T23:59:59.000Z

34

RARE EARTH ELEMENT SENSITIVITY FACTORS IN CALCIC PLAGIOCLASE (ANORTHITE)  

E-Print Network (OSTI)

RARE EARTH ELEMENT SENSITIVITY FACTORS IN CALCIC PLAGIOCLASE (ANORTHITE) C. Floss and B. Jolliff Mc Brookings Drive, St. Louis, MO 63130 1. Introduction The rare earth elements (REE) are sensitive indicators concentrations for each sample are listed in Table 1 and are shown in Fig. 1. Table 1. Rare Earth Element Data

35

Note: Portable rare-earth element analyzer using pyroelectric crystal  

SciTech Connect

We report a portable rare-earth element analyzer with a palm-top size chamber including the electron source of a pyroelectric crystal and the sample stage utilizing cathodoluminescence (CL) phenomenon. The portable rare-earth element analyzer utilizing CL phenomenon is the smallest reported so far. The portable rare-earth element analyzer detected the rare-earth elements Dy, Tb, Er, and Sm of ppm order in zircon, which were not detected by scanning electron microscopy-energy dispersive X-ray spectroscopy analysis. We also performed an elemental mapping of rare-earth elements by capturing a CL image using CCD camera.

Imashuku, Susumu, E-mail: imashuku.susumu.2m@kyoto-u.ac.jp; Fuyuno, Naoto; Hanasaki, Kohei; Kawai, Jun [Department of Materials Science and Engineering, Kyoto University, Sakyo, Kyoto 606-8501 (Japan)] [Department of Materials Science and Engineering, Kyoto University, Sakyo, Kyoto 606-8501 (Japan)

2013-12-15T23:59:59.000Z

36

Scintillation of rare earth doped fluoride nanoparticles  

SciTech Connect

The scintillation response of rare earth (RE) doped core/undoped (multi-)shell fluoride nanoparticles was investigated under x-ray and alpha particle irradiation. A significant enhancement of the scintillation response was observed with increasing shells due: (i) to the passivation of surface quenching defects together with the activation of the REs on the surface of the core nanoparticle after the growth of a shell, and (ii) to the increase of the volume of the nanoparticles. These results are expected to reflect a general aspect of the scintillation process in nanoparticles, and to impact radiation sensing technologies that make use of nanoparticles.

Jacobsohn, L. G.; McPherson, C. L.; Sprinkle, K. B.; Ballato, J. [Center for Optical Materials Science and Engineering Technologies (COMSET), and School of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634 (United States); Yukihara, E. G. [Physics Department, Oklahoma State University, Stillwater, Oklahoma 74078-3072 (United States); DeVol, T. A. [Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, South Carolina 29634-0905 (United States)

2011-09-12T23:59:59.000Z

37

News about Rare Earths, New or Critical Materials, and Their...  

NLE Websites -- All DOE Office Websites (Extended Search)

14, 2014 Could magnets in helmets reduce football concussions?, November 2014 The Rare-Earth Elements -- Vital to Modern Technologies and Lifestyles, November 2014 Energy Report:...

38

Diversity of accessory minerals in rare-metal-rare earth pegmatites  

Science Journals Connector (OSTI)

About 150 accessory minerals have been identified in the rare-metal-rare earth pegmatites, including 36 OH-, F- and H2 O-bearing silicates, 27 volatile-free silicates, 31 complex oxides, and 17 carbonates. Most a...

B. M. Shmakin

2008-12-01T23:59:59.000Z

39

Behavior of Rare Earth Elements in Geothermal Systems- A New  

Open Energy Info (EERE)

Behavior of Rare Earth Elements in Geothermal Systems- A New Behavior of Rare Earth Elements in Geothermal Systems- A New Exploration/Exploitation Tool? Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Behavior of Rare Earth Elements in Geothermal Systems- A New Exploration/Exploitation Tool? Abstract N/A Author Department of Geology and Geological Engineering niversity of Idaho Published Publisher Not Provided, 2001 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Behavior of Rare Earth Elements in Geothermal Systems- A New Exploration/Exploitation Tool? Citation Department of Geology and Geological Engineering niversity of Idaho. 2001. Behavior of Rare Earth Elements in Geothermal Systems- A New Exploration/Exploitation Tool?. (!) : (!) . Retrieved from

40

DOE Announces RFI on Rare Earth Metals | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

RFI on Rare Earth Metals RFI on Rare Earth Metals DOE Announces RFI on Rare Earth Metals May 6, 2010 - 12:00am Addthis Washington, D.C. - The Department of Energy has released a Request for Information (RFI) soliciting information on rare earth metals and other materials used in the energy sector. The request is specifically focused on rare earth metals (e.g., lanthanum, cerium and neodymium) and several other metals including lithium and cobalt, but respondents are welcome to identify other materials of interest. These materials are important to the development and deployment of a variety of clean energy technologies, such as wind turbines, hybrid vehicles, solar panels and energy efficient light bulbs. In a March 17 speech, Assistant Secretary of Energy for Policy & International Affairs David Sandalow announced that DOE is developing its

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

DOE Announces RFI on Rare Earth Metals | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

RFI on Rare Earth Metals RFI on Rare Earth Metals DOE Announces RFI on Rare Earth Metals May 6, 2010 - 12:00am Addthis Washington, D.C. - The Department of Energy has released a Request for Information (RFI) soliciting information on rare earth metals and other materials used in the energy sector. The request is specifically focused on rare earth metals (e.g., lanthanum, cerium and neodymium) and several other metals including lithium and cobalt, but respondents are welcome to identify other materials of interest. These materials are important to the development and deployment of a variety of clean energy technologies, such as wind turbines, hybrid vehicles, solar panels and energy efficient light bulbs. In a March 17 speech, Assistant Secretary of Energy for Policy & International Affairs David Sandalow announced that DOE is developing its

42

Novel rare earth boron-rich solids  

SciTech Connect

A new series of boron-rich solids ReB{sub 22}C{sub 2}N (Re: Y, Ho, Er, Tm, Lu) was synthesized by traditional solid-state reaction. The crystal structure of the representative compound YB{sub 22}C{sub 2}N was solved by direct method from powder X-ray diffraction (XRD) data and transmission electron microscope (TEM) analysis. The unit cell of the new structure is rhombohedral with space group R-3m (No. 166), lattice constant a = b = 5.623(0) {angstrom} and c = 44.785(3) {angstrom} with six formula units in one unit cell. The atoms of boron in the solids, like most of the boron-rich solids, exist with icosahedral and octahedral clusters, and the whole crystal shows a layered structure. The interconnected nine layers of icosahedron and three layers of octahedron in a unit cell build the whole framework of the new phase and rare earth metal atoms reside in voids of the octahedron layers. The neighboring icosahedral layers link through C-B-C chains besides the direct bonding of B-B. Both experimental and structural analysis indicated that the nitrogen atoms in the new phase can be replaced with carbon.

Zhang, Fuxiang; Leithe-Jasper, Andreas; Xu, Jun; Mori, Takao; Matsui, Yoshio, Tanaka, Takaho; Okada, Shigeru

2001-06-01T23:59:59.000Z

43

U.S. Rare Earth Magnet Patents Table © 11-10-2014 page...  

NLE Websites -- All DOE Office Websites (Extended Search)

Rare Earth Magnet Patents Table 11-10-2014 page 1 Disclaimer: This U.S. Rare Earth Magnet Patents Table contains a sample of the rare- earth-magnet patents issued by the U.S....

44

Resonant Inelastic X-ray Scattering of Rare-Earth and Copper Systems  

E-Print Network (OSTI)

Introduction The rare earth elements have unique andun?lled f shell of rare earth elements gives them special4d, 4f shells for rare-earth elements. This suggests that

Kvashnina, Kristina

2007-01-01T23:59:59.000Z

45

Behavior Of Rare Earth Element In Geothermal Systems, A New  

Open Energy Info (EERE)

Behavior Of Rare Earth Element In Geothermal Systems, A New Behavior Of Rare Earth Element In Geothermal Systems, A New Exploration-Exploitation Tool Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Behavior Of Rare Earth Element In Geothermal Systems, A New Exploration-Exploitation Tool Details Activities (32) Areas (17) Regions (0) Abstract: The goal of this four-year project was to provide a database by which to judge the utility of the rare earth elements (REE) in the exploration for and exploitation of geothermal fields in the United States. Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: (1) the North Island of New Zealand (1 set of samples); (2) the Cascades of Oregon; (3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; (4) the Dixie Valley and Beowawe fields

46

A Forward Look into Rare Earth Supply and Demand: A Role for Sedimentary Phosphate Deposits?  

Science Journals Connector (OSTI)

Abstract Rare earth elements, key to many high-technology applications, are regularly making headlines, even in general public newspapers. Will the word run short of rare earth elements and of the many applications that rest on their use? In support to French and European Union policy making, as well as in support to industrial clients, BRGM is monitoring rare earth markets from the supply and the demand sides, as well as for technological shifts that drive them. Not every rare earth element is effectively rare and there are well over 400 ongoing rare earth exploration projects worldwide. Nevertheless, some rare earth elements such as dysprosium, europium and terbium are rare, in high and fast growing demand; as they either are indispensable to the production of Fe-B-Nd (Dy) permanent magnets, the highest performance magnetic material currently being available at industrial scale, or to the production of phosphors essential to the production of fluorescent compact, energy saving, light bulbs and video displays. At the current 10% compound annual growth rate of the demand for these elements, the question arises of their the future availability. Among the many rare-earth bearing minerals apatite is of particular interest as a potential source of rare earth elements, as it is a widespread mineral, forming huge deposits such as the sedimentary and magmatic phosphate deposits. An overview of the potential of sedimentary phosphate deposits as an important source for future rare earth production is presented and discussed. In addition to knowledge about the distribution and concentration of individual rare earth elements in sedimentary phosphate deposits, it is also necessary to understand the partitioning of the individual elements between phosphogypsum and phosphoric acid in the fertilizer production process, as well as available technologies to recover and separate individual rare earth elements from these materials. This could pave the way to the generation of extra added-value for phosphate producers, and to the broadening of the international production base of rare earth elements in high demand by the global economy.

Patrice Christmann

2014-01-01T23:59:59.000Z

47

Behaviour of zirconium, niobium, yttrium and the rare earth elements in the Thor Lake rare-metal  

E-Print Network (OSTI)

Behaviour of zirconium, niobium, yttrium and the rare earth elements in the Thor Lake rare and the heavy rare earth elements in the world. Much of the potentially economic mineralization was concentrated of Science Department of Earth and Planetary Sciences McGill University, Montreal, QC, Canada February 2010

48

Process to remove rare earth from IFR electrolyte  

DOE Patents (OSTI)

The invention is a process for the removal of rare earths from molten chloride electrolyte salts used in the reprocessing of integrated fast reactor fuel (IFR). The process can be used either continuously during normal operation of the electrorefiner or as a batch process. The process consists of first separating the actinide values from the salt before purification by removal of the rare earths. After replacement of the actinides removed in the first step, the now-purified salt electrolyte has the same uranium and plutonium concentration and ratio as when the salt was removed from the electrorefiner.

Ackerman, J.P.; Johnson, T.R.

1992-01-01T23:59:59.000Z

49

Rare earth-transition metal scrap treatment method  

DOE Patents (OSTI)

Rare earth-transition metal (e.g. iron) scrap (e.g. Nd-Fe-B scrap) is melted to reduce the levels of tramp oxygen and nitrogen impurities therein. The tramp impurities are reduced in the melt by virtue of the reaction of the tramp impurities and the rare earth to form dross on the melt. The purified melt is separated from the dross for reuse. The oxygen and nitrogen of the melt are reduced to levels acceptable for reuse of the treated alloy in the manufacture of end-use articles, such as permanent magnets. 3 figs.

Schmidt, F.A.; Peterson, D.T.; Wheelock, J.T.; Jones, L.L.; Lincoln, L.P.

1992-02-11T23:59:59.000Z

50

Process to remove rare earth from IFR electrolyte  

DOE Patents (OSTI)

The invention is a process for the removal of rare earths from molten chloride electrolyte salts used in the reprocessing of integrated fast reactor fuel (IFR). The process can be used either continuously during normal operation of the electrorefiner or as a batch process. The process consists of first separating the actinide values from the salt before purification by removal of the rare earths. After replacement of the actinides removed in the first step, the now-purified salt electrolyte has the same uranium and plutonium concentration and ratio as when the salt was removed from the electrorefiner. 1 fig.

Ackerman, J.P.; Johnson, T.R.

1994-08-09T23:59:59.000Z

51

Rare?Earth?Free Permanent Magnets for Electrical Vehicle Motors and Wind Turbine Generators: Hexagonal Symmetry Based Materials Systems Mn?Bi and M?type Hexaferrite  

SciTech Connect

The research we conducted focuses on the rare-earth (RE)-free permanent magnet by modeling, simulating, and synthesizing exchange coupled two-phase (hard/soft) RE-free core-shell nano-structured magnet. The RE-free magnets are made of magnetically hard core materials (high anisotropy materials including Mn-Bi-X and M-type hexaferrite) coated by soft shell materials (high magnetization materials including Fe-Co or Co). Therefore, our research helps understand the exchange coupling conditions of the core/shell magnets, interface exchange behavior between core and shell materials, formation mechanism of core/shell structures, stability conditions of core and shell materials, etc.

Hong, Yang-Ki [University of Alabama] [University of Alabama; Haskew, Timothy [University of Alabama] [University of Alabama; Myryasov, Oleg [University of Alabama] [University of Alabama; Jin, Sungho [University of California San Diego] [University of California San Diego; Berkowitz, Ami [University of California San Diego] [University of California San Diego

2014-06-05T23:59:59.000Z

52

Dynamic Effective-Field Scheme for Rare-Earth Systems  

Science Journals Connector (OSTI)

We demonstrate the importance of including the dynamical exchange-interaction term in the Hamiltonian of a rare-earth system. The probability distribution of the dynamic exchange field is derived in the molecular field approximation. The result is exemplified for the zero-field magnetization and crystal field spectroscopy of NdSb.

Albert Furrer and Heinz Heer

1973-11-26T23:59:59.000Z

53

Cathode-Luminescence of Rare Earths in Coal Ash  

Science Journals Connector (OSTI)

... Samples of a number of Indian coals (from Darjeeling, Assam, Raniganj, Jharia and Hyderabad) were incinerated in thin layers ... in an electric furnace at 400° C. The presence of rare earths in the ashes so obtained could not be detected by arc spectrographic analysis with a current of 10 ...

BIBHUTI MUKHERJEE

1949-03-12T23:59:59.000Z

54

Influence of mechanoactivation on rare earths leaching from phosphogypsum  

Science Journals Connector (OSTI)

The influence of mechanoactivation on the overall solubility of CaSO4 · 2H2O and of phosphogypsum in water and in diluted acids (10% HCl, 7% H2SO4) as well as on the leaching of rare earths from phosphogypsum have been studied. The mechanoactivation is performed in a centrifugal ball mill in air and in suspension with the acids mentioned above. Part of the experimental results are qualitatively explained considering the partial dehydration of the CaSO4 · 2H2O during the activation in air as well as considering the crystal structure disrupted by mechanoactivation. A dissolved fraction, considerably enriched in rare earths (compared to the initial phosphogypsum) is obtained as a result of H2SO4 treatment of the samples activated in water solution.

D. Todorovsky; A. Terziev; M. Milanova

1997-01-01T23:59:59.000Z

55

Magnetic Symmetry of Rare-Earth Orthochromites and Orthoferrites  

Science Journals Connector (OSTI)

A new magnetic symmetry of the rare-earth orthochromites and orthoferrites (RMO3) below the second Néel temperature due to the reordering of the rare-earth spins is proposed. It is shown that the magnetic symmetry group is lowered to the subgroup of index two, thereby keeping the unit cell invariant. The proposed symmetry is shown to be consistent with the previously observed spin configuration of RMO3 such as GdCrO3, DyFeO3, and DyCrO3, and would also be consistent with those of other RMO3. Although symmetry arguments and the calculation of the free energy show that two spin configurations are stable, in GdCrO3, a future measurement of the magnetoelectric tensor would determine which configuration GdCrO3 has. It is further predicted that the magnetoelectric effect should be observed in any RMO3 below the second Néel temperature.

Tsuyoshi Yamaguchi and Kunirô Tsushima

1973-12-01T23:59:59.000Z

56

DOE Seeks Your Novel Ideas for Recovery of Rare Earth Elements...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Seeks Your Novel Ideas for Recovery of Rare Earth Elements from Coal and Coal Byproducts DOE Seeks Your Novel Ideas for Recovery of Rare Earth Elements from Coal and Coal...

57

Laser Spectroscopy of Short Lived Rare Earth Isotopes  

Science Journals Connector (OSTI)

The ISAC facility at TRIUMF is able to produce intense beams of mass?separated radioactive isotopes of the alkali and the rare earth elements with unprecedented intensities. This will allow our laser spectroscopy collaboration to extend the studies of exotic nuclei for these elements further away from the valley of stability into regions so far inaccessible at other facilities thus allowing a more stringent test of the descriptive and predictive power of global nuclear models. Our effort which involves groups and researchers from the U.S. (TAMU) Japan (JAERI) and Canada (TRIUMF McGill and Calgary Universities) is based on collinear laser spectroscopy in a fast beam. In this method atoms or ions are excited by laser light in collinear geometry. In this way measurements of the optical isotope shift yield the nuclear charge radii and measurements of the hyperfine structure the nuclear moments. The excitation can be done by cw?lasers or alternatively by pulsed lasers without a loss in sensitivity if bunched radioactive ion beams are available. In its basic version the resonances of the spectral lines are observed optically at right angles. However the sensitivity will be increased through modifications using particle or nuclear radiation detection. The progress and the plans of our collaboration will be described.

H. A. Schuessler; F. Buchinger; H. Iimura

2003-01-01T23:59:59.000Z

58

Crystal Fields and the Effective-Point-Charge Model in the Rare-Earth Pnictides  

Science Journals Connector (OSTI)

Neutron scattering and specific-heat studies of the crystal fields in the rare-earth monophosphides are reported. It is found that the fourth-order crystal-field parameters for the phosphides and for other rare-earth pnictides fall on a universal curve which is close to that predicted by an effective-point-charge model for the light rare earths but deviates markedly for the heavy rare earths.

R. J. Birgeneau; E. Bucher; J. P. Maita; L. Passell; K. C. Turberfield

1973-12-15T23:59:59.000Z

59

High-pressure studies of rare earth material could lead to lighter, cheaper  

NLE Websites -- All DOE Office Websites (Extended Search)

22013_earth 22013_earth 12/20/2013 A Lawrence Livermore researcher prepares a sample at Oak Ridge National Laboratory's Spallation Neutrons and Pressure Diffractometer (SNAP). High-pressure studies of rare earth material could lead to lighter, cheaper magnets Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Sometimes you have to apply a little pressure to get magnetic materials to reveal their secrets. By placing a permanent magnet under high pressures, Lawrence Livermore researchers are exploring how atomic structure enhances magnetic strength and resistance to demagnetization. This fundamental research into magnetic behavior has important implications for engineering stronger, cheaper magnets. Permanent magnets based on rare earth elements are in high demand for

60

Rare earth elements activate endocytosis in plant cells Lihong Wanga,b,1  

E-Print Network (OSTI)

Rare earth elements activate endocytosis in plant cells Lihong Wanga,b,1 , Jigang Lic,d,1 , Qing (sent for review May 15, 2014) It has long been observed that rare earth elements (REEs) regulate, such as rare earth elements (REEs), have been observed for a long time to be beneficial to plant growth (1, 2

Deng, Xing-Wang

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

VISIBLE AND INFRARED RARE-EARTH ACTIVATED ELECTROLUMINESCENCE FROM ERBIUM DOPED GaN  

E-Print Network (OSTI)

. At the same time novel work is being conducted using rare earth elements as sources of light emission. Results. III-V semiconductors doped with rare-earth elements have also been used10VISIBLE AND INFRARED RARE-EARTH ACTIVATED ELECTROLUMINESCENCE FROM ERBIUM DOPED GaN M. Garter*, R

Steckl, Andrew J.

62

Rare earth elements in the sediments of Lake Baikal Lawrence M. Och a  

E-Print Network (OSTI)

Rare earth elements in the sediments of Lake Baikal Lawrence M. Och a , Beat Müller a, , Adrian Available online 3 April 2014 Editor: Carla M. Koretsky Keywords: Rare earth elements Cerium anomaly Lake to complex and cryptic redox cycles. The mobility of rare earth elements (REEs) is influenced

Wehrli, Bernhard

63

Speciation of adsorbed yttrium and rare earth elements on oxide surfaces  

E-Print Network (OSTI)

Speciation of adsorbed yttrium and rare earth elements on oxide surfaces Wojciech Piasecki, Dimitri 10 June 2008 Abstract The distribution of yttrium and the rare earth elements (YREE) between natural investigate the applicability of the X-ray results to rare earth elements and to several oxides in addition

Sverjensky, Dimitri A.

64

Source and mobility of Rare Earth Elements in a sedimentary aquifer system: Aquitaine basin (Southern France)  

E-Print Network (OSTI)

Source and mobility of Rare Earth Elements in a sedimentary aquifer system: Aquitaine basin Geological Survey Service, Bordeaux, France, e.malcuit@brgm.fr The study of rare earth elements (REEs such as rivers and lakes and groundwaters. Rare earth elements) are of great interest because of their unique

Paris-Sud XI, Université de

65

Use of rare earth elements as external markers for mean retention time measurements in ruminants  

E-Print Network (OSTI)

Review Use of rare earth elements as external markers for mean retention time measurements -- The present review deals with the utilisation of rare earth (RE) elements as particulate markers for ruminant earth / retention time / feedstuff / methodology / ruminant Résumé -- Utilisation des terres rares comme

Paris-Sud XI, Université de

66

Hydrothermal transport and deposition of the rare earth elements by fluorine-bearing aqueous liquids  

E-Print Network (OSTI)

ARTICLE Hydrothermal transport and deposition of the rare earth elements by fluorine environmental concerns, have created a great demand for the rare earth elements (REE), and focused considerable Hydrothermal concentration of the rare earth elements (REE) to economic and potentially economic levels has

67

Iron Isotope and Rare Earth Element Patterns of the Neoproterozoic Fulu Formation, South China: Implications for Late Proterozoic Ocean Chemistry  

E-Print Network (OSTI)

13 3.5. Rare Earth Element Analysis…………………………………………. ……15 4.21 b. 5.2. Rare Earth Element Patterns……………………………………………24 6.Piper, D. Z. (1974). Rare earth elements in the sedimentary

Goldbaum, Elizabeth

2014-01-01T23:59:59.000Z

68

Crystal Fields in Dilute Rare-Earth Metals Obtained from Magnetization Measurements on Dilute Rare-Earth Alloys  

Science Journals Connector (OSTI)

Crystal field parameters of Tb, Dy, and Er in Sc, Y, and Lu are summarized. These parameters are obtained from magnetization measurements on dilute single crystals, and successfully checked by a number of different methods. The crystal field parameters vary unpredictably with the rare-earth solute. B40, B60, and B66 are similar in Y and Lu. Crystal field parameters for the pure metals Tb, Dy, and Er are estimated from the crystal fields in Y and Lu.

P. Touborg and J. Høg

1974-09-23T23:59:59.000Z

69

Theory of Rayleigh waves on paramagnetic rare-earth systems  

Science Journals Connector (OSTI)

We present calculations of the velocity changes of Rayleigh waves in cubic, paramagnetic rare-earth systems due to magnetoelastic interactions. These interactions describe the coupling of the strain and rotational part of the deformation tensor to the incomplete 4f shell. They can be influenced by applying a magnetic field. An equation is obtained which generalizes that of Stoneley for cubic systems without magnetoelastic interactions. Special attention is paid to effects resulting from the rotational interactions. The theory is applied to CeAl2 for which experiments are available.

Robert Camley and Peter Fulde

1981-03-15T23:59:59.000Z

70

K Series X-Ray Wavelengths in Rare Earth Elements  

Science Journals Connector (OSTI)

The K-series x-rays in ten rare earth elements have been studied with a two-meter-radius bent-quartz-crystal spectrograph. The 3.7-Mev proton beam of the A-48 accelerator (UCRL, Livermore) was used to produce the atomic excitations. The wavelengths obtained for the K?1, K?2, K?3, and K?1 lines are compared with previous wavelength measurements. Two weaker transitions, K?5 and KOIIOIII, were also observed and the energies are compared with energies obtained from tables of known atomic energy levels.

E. L. Chupp, J. W. M. Du Mond, F. J. Gordon, R. C. Jopson, and Hans Mark

1958-11-15T23:59:59.000Z

71

As China's Rare Earth R&D Becomes Ever More Rarefied, Others Tremble  

Science Journals Connector (OSTI)

...production and slap export tariffs on some rare...paper last month, China's Ministry of Industry...idea of prohibiting export of three scarcer rare earths...company in London. China has a “natural monopoly...complex hydrocarbons in petroleum refining. Military...which forced China to import processed rare earths...

Richard Stone

2009-09-11T23:59:59.000Z

72

The impact of vegetation on fractionation of rare earth elements (REE) during waterrock interaction  

E-Print Network (OSTI)

The impact of vegetation on fractionation of rare earth elements (REE) during water The fractionation of the rare earth elements (REE) in river water, as well as the immobilization of REE in the river earth elements (REE) principally originate from apatite dissolution during weathering. However, stream

Mailhes, Corinne

73

Rare-Earth Surface Alloying: A New Phase for GdAu2 M. J. Verstraete,1,2  

E-Print Network (OSTI)

refrigeration, are made pos- sible by an unusual group of elements: the rare earths (REs). The rare earthsRare-Earth Surface Alloying: A New Phase for GdAu2 M. Corso,1 M. J. Verstraete,1,2 F. Schiller,1 M. Gadolinium is a borderline rare earth, which is naturally ferromagnetic but can easily switch to different

74

Influence of double-electron transitions on the EXAFS L edges of rare-earth systems  

Science Journals Connector (OSTI)

This work presents an x-ray-absorption study at the L edges of several rare-earth compounds. In both L1-edge and L3-edge spectra, anomalous features are clearly detected in the EXAFS region and have been associated with the creation of 2s4d and 2p4d double-core hole states, respectively. Comparison of theoretical calculations with the experiments are carried out using the results of explicit computation of cross sections for the allowed mainline (L edge) and double-electron (LN4,5 edges) which identify the transitions expected to be observable. In addition, the excitation energies of all of these allowed transitions are given. The influence of multielectron transitions on the EXAFS data analysis is discussed for several rare-earth-based systems. An estimate of the error introduced by neglecting the presence of double-electron transitions on coordination numbers and bond distances is given, based on these experimental data.

Jesús Chaboy; Augusto Marcelli; Trevor A. Tyson

1994-05-01T23:59:59.000Z

75

Grant Helps Make U.S. Rare Earth Magnets More Common | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Grant Helps Make U.S. Rare Earth Magnets More Common Grant Helps Make U.S. Rare Earth Magnets More Common Grant Helps Make U.S. Rare Earth Magnets More Common August 6, 2010 - 12:12pm Addthis With sintered rare earth magnets a $4 billion worldwide market, the U.S. could be a bigger producer of these magnets - which are not actually rare - and are used in hybrid vehicle motors and wind turbine generators. | Illustration Courtesy of of Electron Energy Corporation | With sintered rare earth magnets a $4 billion worldwide market, the U.S. could be a bigger producer of these magnets - which are not actually rare - and are used in hybrid vehicle motors and wind turbine generators. | Illustration Courtesy of of Electron Energy Corporation | Kevin Craft Electron Energy Corporation is one of a kind. According to Peter Dent, vice president of business development for the

76

Grant Helps Make U.S. Rare Earth Magnets More Common | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Grant Helps Make U.S. Rare Earth Magnets More Common Grant Helps Make U.S. Rare Earth Magnets More Common Grant Helps Make U.S. Rare Earth Magnets More Common August 6, 2010 - 12:12pm Addthis With sintered rare earth magnets a $4 billion worldwide market, the U.S. could be a bigger producer of these magnets - which are not actually rare - and are used in hybrid vehicle motors and wind turbine generators. | Illustration Courtesy of of Electron Energy Corporation | With sintered rare earth magnets a $4 billion worldwide market, the U.S. could be a bigger producer of these magnets - which are not actually rare - and are used in hybrid vehicle motors and wind turbine generators. | Illustration Courtesy of of Electron Energy Corporation | Kevin Craft Electron Energy Corporation is one of a kind. According to Peter Dent, vice president of business development for the

77

Iron-Nitride-Based Magnets: Synthesis and Phase Stabilization of Body Center Tetragonal (BCT) Metastable Fe-N Anisotropic Nanocomposite Magnet- A Path to Fabricate Rare Earth Free Magnet  

SciTech Connect

REACT Project: The University of Minnesota will develop an early stage prototype of an iron-nitride permanent magnet material for EVs and renewable power generators. This new material, comprised entirely of low-cost and abundant resources, has the potential to demonstrate the highest energy potential of any magnet to date. This project will provide the basis for an entirely new class of rare-earth-free magnets capable of generating power without costly and scarce rare earth materials. The ultimate goal of this project is to demonstrate a prototype with magnetic properties exceeding state-of-the-art commercial magnets.

None

2012-01-01T23:59:59.000Z

78

Rare earth focused ion beam implantation utilizing Er and Pr liquid alloy ion sources  

E-Print Network (OSTI)

Pr,10,11 Eu,12 Dy,13 Er,13­15 and Tm16 doped GaN. Rare earth elements were added during growthRare earth focused ion beam implantation utilizing Er and Pr liquid alloy ion sources L. C. Chao, B write implantation. © 1999 American Vacuum Society. S0734-211X 99 08306-7 I. INTRODUCTION Rare earth

Steckl, Andrew J.

79

Microsoft Word - Rare Earth Update for RFI 110523final  

NLE Websites -- All DOE Office Websites (Extended Search)

J. Thijssen, LLC P: 206 229 6882 J. Thijssen, LLC P: 206 229 6882 4910 163 rd Ave NE Redmond, WA 98052 e: jant@jthijssen.com Solid Oxide Fuel Cells and Critical Materials: A Review of Implications J. Thijssen, LLC Report Number: R102 06 04D1 Date: May 10, 2011 Prepared for: National Energy Technology Laboratory, In Sub-Contract to Leonardo Technologies, Inc. Contract Number: DE-FE0004002 (Subcontract: S013-JTH-PPM4002 MOD 00) 2 Summary The US DOE has identified a number of materials that are both used by clean energy technologies and are at risk of supply disruptions in the short term. Several of these materials, especially the rare earth elements (REEs) yttrium, cerium, and lanthanum were identified by DOE as critical (USDOE 2010) and are crucial to the function and performance of solid oxide

80

Microsoft Word - rare earth speech 3-18 6am  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

REMARKS PREPARED FOR DELIVERY REMARKS PREPARED FOR DELIVERY TECHNOLOGY AND RARE EARTH METALS CONFERENCE 2010 KEYNOTE ADDRESS DAVID SANDALOW ASSISTANT SECRETARY FOR POLICY & INTERNATIONAL AFFAIRS U.S. DEPARTMENT OF ENERGY WASHINGTON, D.C. MARCH 17, 2010 [Acknowledgements.] 1. INTRODUCTION Thank you for the invitation to speak at this important conference. At energy conferences today, no topic is hotter than shale gas. The story is striking: recoverable reserves of shale gas have increased six-fold in the past few years, thanks to new drilling technologies. This increase has been transformational, with U.S. natural gas imports now predicted to drop steadily in the next decade and beyond, whereas just a few years ago imports were projected to climb for the foreseeable future. Large shale gas reserves are believed to exist

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Shell model Monte Carlo investigation of rare earth nuclei  

Science Journals Connector (OSTI)

We utilize the shell model Monte Carlo method to study the structure of rare earth nuclei. This work demonstrates the first systematic full oscillator shell with intruder calculations in such heavy nuclei. Exact solutions of a pairing plus quadrupole Hamiltonian are compared with the static path approximation in several dysprosium isotopes from A=152 to 162, including the odd mass A=153. Some comparisons are also made with Hartree-Fock-Bogoliubov results from Baranger and Kumar. Basic properties of these nuclei at various temperatures and spin are explored. These include energy, deformation, moments of inertia, pairing channel strengths, band crossing, and evolution of shell model occupation numbers. Exact level densities are also calculated and, in the case of 162Dy, compared with experimental data.

J. A. White; S. E. Koonin; D. J. Dean

2000-02-14T23:59:59.000Z

82

Alternative High-Performance Motors with Non-Rare Earth Materials...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Alternative High-Performance Motors with Non-Rare Earth Materials 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer...

83

Fabrication and evaluation of rare-earth-bearing fuel slugs for sodium-cooled fast reactors  

Science Journals Connector (OSTI)

Separation of rare-earth (RE) elements from minor actinides is difficult in pyroprocessing, especially for light REs (e.g....

Jong Hwan Kim; Hoon Song; Ki Hwan Kim…

2014-10-01T23:59:59.000Z

84

Pseudocrystalline model of the magnetic anisotropy in amorphous rare-earth–transition-metal thin films  

Science Journals Connector (OSTI)

A pseudocrystalline model is proposed to explain the occurrence of perpendicular anisotropy in amorphous rare-earth–transition metal (R-T) thin films. It is based on the central hypothesis that during layer-by-layer growth small planar hexagonal units are formed defining on average a preferential axis perpendicular to the film plane. The units are similar in structure to relaxed crystalline ones and are estimated to typically comprise six rare-earth atoms. They are regarded as an idealized model of the short-range order and are consistent with the known nearest-neighbor R-T and T-T coordination numbers in the amorphous state. This model is able to explain the known experimental results concerning the influence of composition, substrate temperature, annealing, and bombardment effects during sputter deposition on the magnetic anisotropy of thin amorphous rare-earth–transition-metal films of the system (Nd, Tb, Dy) (Fe, Co), as well as the destruction of this anisotropy by additives.

D. Mergel; H. Heitmann; P. Hansen

1993-01-01T23:59:59.000Z

85

Watch a Rare Earth Elements Event Live This Morning | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Watch a Rare Earth Elements Event Live This Morning Watch a Rare Earth Elements Event Live This Morning Watch a Rare Earth Elements Event Live This Morning December 15, 2010 - 9:20am Addthis Ginny Simmons Ginny Simmons Former Managing Editor for Energy.gov, Office of Public Affairs From 9:30am to noon ET today you can tune into a live discussion on "rare earth materials" that are critical to the production of clean energy technologies. Tune in here. The Department of Energy's Assistant Secretary for Policy and International Affairs David Sandalow will give the keynote, speaking to the role of rare earth metals and other materials in the clean energy economy. You can check back to the Energy Blog for more info later today. Ginny Simmons is a New Media Specialist and contractor to the Office of Public Affairs.

86

DOE Announces Second RFI on Rare Earth Metals | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Second RFI on Rare Earth Metals Second RFI on Rare Earth Metals DOE Announces Second RFI on Rare Earth Metals March 22, 2011 - 12:00am Addthis Washington, D.C. - The Department of Energy today released a Request for Information (RFI) soliciting information from the public on rare earth metals and other materials used in the energy sector. Responses to this RFI will inform an update to DOE's Critical Materials Strategy (pdf - 5.7mb ), released December 15, 2010, that assessed the use of rare earth metals and other materials important to the development and deployment of a variety of clean energy technologies, such as wind turbines, hybrid vehicles, solar panels and energy efficient light bulbs. The updated strategy, expected later this year, will include additional analysis of rapidly-changing market conditions. It will analyze the use

87

Watch a Rare Earth Elements Event Live This Morning | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Watch a Rare Earth Elements Event Live This Morning Watch a Rare Earth Elements Event Live This Morning Watch a Rare Earth Elements Event Live This Morning December 15, 2010 - 9:20am Addthis Ginny Simmons Ginny Simmons Former Managing Editor for Energy.gov, Office of Public Affairs From 9:30am to noon ET today you can tune into a live discussion on "rare earth materials" that are critical to the production of clean energy technologies. Tune in here. The Department of Energy's Assistant Secretary for Policy and International Affairs David Sandalow will give the keynote, speaking to the role of rare earth metals and other materials in the clean energy economy. You can check back to the Energy Blog for more info later today. Ginny Simmons is a New Media Specialist and contractor to the Office of Public Affairs.

88

Solvent extraction of rare-earth metals by carboxylic acids  

SciTech Connect

The solvent extraction of the trivalent lanthanides and yttrium from nitrate media by solutions of carboxylic acids in xylene has been studied. Commercially available carboxylic acids such as Versatic 10 and naphthenic acids were used, as well as model compounds of known structure, such as 2-ethylhexanoic and 3-cyclohexylpropanoic acids. In a few cases, extraction of the metals from sulphate and chloride solutions was also investigated. The dependence of the extraction properties of the carboxylic acids on the atomic number of the lanthanide shows a definite relationship to the steric bulk of the carboxylic acid molecule quantified by means of the steric parameter, E{sub s}{prime} of the substituent alkyl group. The stoichiometries of the extracted complexes for representative light (La), middle (Gd) and heavy (Lu) rare-earth metals were investigated by the slope-analysis technique for a sterically hindered acid (Versatic 10 acid; -E{prime}{sub s} = 3.83) and an acid with low steric hindrance (3-cyclohexylpropanoic acid; -E{prime}{sub s} = 0.28). 14 refs., 13 figs., 3 tabs.

Preez, A.C. du; Preston, J.S. [Mintek, Randburg (South Africa)

1992-04-01T23:59:59.000Z

89

Efficient, High-Torque Electric Vehicle Motor: Advanced Electric Vehicle Motors with Low or No Rare Earth Content  

SciTech Connect

REACT Project: QM Power will develop a new type of electric motor with the potential to efficiently power future generations of EVs without the use of rare-earth-based magnets. Many of today’s EV motors use rare earth magnets to efficiently provide torque to the wheels. QM Power’s motors would contain magnets that use no rare earth minerals, are light and compact, and can deliver more power with greater efficiency and at reduced cost. Key innovations in this project include a new motor design with iron-based magnetic materials, a new motor control technique, and advanced manufacturing techniques that substantially reduce the cost of the motor. The ultimate goal of this project is to create a cost-effective EV motor that offers the rough peak equivalent of 270 horsepower.

None

2012-01-01T23:59:59.000Z

90

High-temperature desulfurization of gasifier effluents with rare earth and rare earth/transition metal oxides  

SciTech Connect

We have improved the application of mixed rare-earth oxides (REOs) as hot gas desulfurization adsorbents by impregnating them on stable high surface area supports and by the inclusion of certain transition metal oxides. We report comparative desulfurization experiments at high temperature (900 K) using a synthetic biomass gasifier effluent containing 0.1 vol % H{sub 2}S, along with H{sub 2}, CO{sub 2}, and water. More complex REO sorbents outperform the simpler CeO{sub 2}/La{sub 2}O{sub 3} mixtures, in some cases significantly. Supporting REOs on Al{sub 2}O{sub 3} (?20 wt % REO) or ZrO{sub 2} actually increased the sulfur capacities found after several cycles on a total weight basis. Another major increase in sulfur capacity took place when MnO{sub x} or FeO{sub x} is incorporated. Apparently most of the Mn or Fe is dispersed on or near the surface of the mixed REOs because the capacities with REOs greatly exceeded those of Al{sub 2}O{sub 3}-supported MnO{sub x} or FeO{sub x} alone at these conditions. In contrast, incorporating Cu has little effect on sulfur adsorption capacities. Both the REO and transition metal/REO adsorbents could be regenerated completely using air for at least five repetitive cycles.

Dooley, Kerry M.; Kalakota, Vikram; Adusumilli, Sumana

2011-01-01T23:59:59.000Z

91

Red-Green Emitting and Superparamagnetic Nanomarkers Containing Fe3O4 Functionalized with Calixarene and Rare Earth Complexes  

Science Journals Connector (OSTI)

Red-Green Emitting and Superparamagnetic Nanomarkers Containing Fe3O4 Functionalized with Calixarene and Rare Earth Complexes ... ? Nuclear

Latif U. Khan; Hermi F. Brito; Jorma Hölsä; Kleber R. Pirota; Diego Muraca; Maria C.F.C. Felinto; Ercules E.S. Teotonio; Oscar L. Malta

2014-12-05T23:59:59.000Z

92

Magnetic and transport properties of the rare-earth-based Heusler phases RPdZ and RPd2Z (Z=Sb,Bi)  

Science Journals Connector (OSTI)

Four series of ternary compounds RPdSb (R=Y,Ho,Er), RPdBi (R=Nd,Y,Dy,Ho,Er), RPd2Sb (R=Y,Gd-Er), and RPd2Bi (R=Y,Dy-Er) were studied by means of magnetization, magnetic susceptibility, electrical resistivity, magnetoresistivity, thermoelectric power, and Hall effect measurements, performed in the temperature range 1.5–300K and in magnetic fields up to 12T. All these ternaries, except for diamagnetic Y-based phases, exhibit localized magnetism of R3+ ions, and a few of them order antiferromagnetically at low temperatures (TN=2–14K). The equiatomic compounds show half-metallic conductivity due to the formation of narrow gaps in their electronic band structures near the Fermi energy. Their Seebeck coefficient at room temperature is exceptionally high (S up to 200?V?K), being promising for thermoelectric applications. In contrast, all the 1:2:1 phases are semimetals and their thermoelectric power is much lower (maximum S of 10–25?V?K). The Hall effect in the compounds studied corroborates complex character of their electronic structure with multiple electron and hole bands with different temperature and magnetic field variations of carrier concentrations and their mobilities.

K. Gofryk; D. Kaczorowski; T. Plackowski; A. Leithe-Jasper; Yu. Grin

2005-09-09T23:59:59.000Z

93

Global In-Use Stocks of the Rare Earth Elements: A First Estimate  

Science Journals Connector (OSTI)

Since 1990, China has played a dominant role in REE mining production; other countries are almost completely dependent on imports from China with respect to rare earth resources. ... The stages within the system are linked to each other by flows, the system within a particular cycle is associated with other regions by imports and exports at each stage, and all of the rare earth elements are linked through a common processing stage. ... China has traditionally employed rare earths in applications such as metallurgical additives and alloys, petroleum refining, and glass and ceramics, but new applications in China have grown significantly since 2002. ...

Xiaoyue Du; T. E. Graedel

2011-03-25T23:59:59.000Z

94

Rare-earth plasma extreme ultraviolet sources at 6.5-6.7 nm  

SciTech Connect

We have demonstrated a laser-produced plasma extreme ultraviolet source operating in the 6.5-6.7 nm region based on rare-earth targets of Gd and Tb coupled with a Mo/B{sub 4}C multilayer mirror. Multiply charged ions produce strong resonance emission lines, which combine to yield an intense unresolved transition array. The spectra of these resonant lines around 6.7 nm (in-band: 6.7 nm {+-}1%) suggest that the in-band emission increases with increased plasma volume by suppressing the plasma hydrodynamic expansion loss at an electron temperature of about 50 eV, resulting in maximized emission.

Otsuka, Takamitsu; Higashiguchi, Takeshi; Yugami, Noboru; Yatagai, Toyohiko [Department of Advanced Interdisciplinary Sciences, Center for Optical Research and Education (CORE), Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi 321-8585 (Japan); Kilbane, Deirdre; White, John; Dunne, Padraig; O'Sullivan, Gerry [School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland); Jiang, Weihua [Department of Electrical Engineering, Nagaoka University of Technology, Kami-tomiokamachi 1603-1, Nagaoka, Niigata 940-2188 (Japan); Endo, Akira [Forschungszentrum Dresden, Bautzner Landstrs. 400, D-01328 Dresden (Germany)

2010-09-13T23:59:59.000Z

95

Synthesis and characterization of rare-earth doped SrBi{sub 2}Nb{sub 2}O{sub 9} phase in lithium borate based nanocrystallized glasses  

SciTech Connect

Glass composites comprising of un-doped and samarium-doped SrBi{sub 2}Nb{sub 2}O{sub 9} nanocrystallites are fabricated in the glass system 16.66SrO-16.66[(1-x)Bi{sub 2}O{sub 3}-xSm{sub 2}O{sub 3}]-16.66Nb{sub 2}O{sub 5}-50Li{sub 2}B{sub 4}O{sub 7} (0<=x<=0.5, in mol%) via the melt quenching technique. The glassy nature of the as-quenched samples is established by differential thermal analyses. Transmission electron microscopic studies reveal the presence of about 15 nm sized spherical crystallites of the fluorite-like SrBi{sub 1.9}Sm{sub 0.1}Nb{sub 2}O{sub 9} phase in the samples heat treated at 530 deg. C. The formation of layered perovskite-type un-doped and samarium-doped SrBi{sub 2}Nb{sub 2}O{sub 9} nanocrystallites with an orthorhombic structure through the intermediate fluorite phase is confirmed by X-ray powder diffraction and micro-Raman spectroscopic studies. The influence of samarium doping on the lattice parameters, lattice distortions, and the Raman peak positions of SrBi{sub 2}Nb{sub 2}O{sub 9} perovskite phase is clarified. The dielectric constants of the perovskite SrBi{sub 2}Nb{sub 2}O{sub 9} and SrBi{sub 1.9}Sm{sub 0.1}Nb{sub 2}O{sub 9} nanocrystals are relatively larger than those of the corresponding fluorite-like phase and the precursor glass. - Graphical Abstract: This figure shows the XRD patterns at room temperature for the as-quenched and heat treated samples in Sm{sub 2}O{sub 3}-doped (x=0.1) glass. Based on these results, it is concluded that the formation of samarium-doped perovskite SBN phase takes place via an intermediate fluorite-like phase in the crystallization of this glass.

Harihara Venkataraman, B. [Department of Materials Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka 940-2188 (Japan); Fujiwara, Takumi [Department of Applied Physics, Graduate School of Engineering, Tohoku University, Sendai 980-8579 (Japan); Komatsu, Takayuki, E-mail: komatsu@mst.nagaokaut.ac.j [Department of Materials Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka 940-2188 (Japan)

2009-06-15T23:59:59.000Z

96

Portable X-ray fluorescence in the assessment of rare earth element-enriched sedimentary phosphate deposits  

Science Journals Connector (OSTI)

...fluorescence in the assessment of rare earth element-enriched sedimentary...considered as potential sources of rare earth elements (REEs) and...phosphate deposit|pulps|rare earth elements|recalibration...into effluents associated with phosphogypsum stockpiles and could pose a...

G.J. Simandl; R. Fajber; S. Paradis

97

Effect of microstructure, grain size, and rare earth doping on the electrorheological performance of nanosized particle materials  

E-Print Network (OSTI)

and grain sizes were prepared by doping TiO2 or ZrO2 with rare earth (RE) elements, and by changingEffect of microstructure, grain size, and rare earth doping on the electrorheological performance-Hua Zhang,c Shu-Mei Chen,d Rui-Li Huange and Song Gaoa a State Key Laboratory of Rare Earth Materials

Gao, Song

98

PII S0016-7037(02)00888-8 EXAFS study of rare-earth element coordination in calcite  

E-Print Network (OSTI)

PII S0016-7037(02)00888-8 EXAFS study of rare-earth element coordination in calcite E. J. ELZINGA,1-structure (EXAFS) spectroscopy is used to characterize the local coordination of selected rare-earth elements (Nd3 for the increased coordination for the larger rare-earth elements involves bidentate ligation from a CO3 group

Peale, Robert E.

99

Synthesis and luminescence properties of rare earth activated phosphors for near UV-emitting LEDs for efficacious generation of white light  

E-Print Network (OSTI)

of R 2 SiO 5 (R = rare earth elements)?, Mater. Res. Bull.QE Quantum Efficiency RE Rare Earth Elements RGB Red, green,transition metal or rare earth elements. The standard

Han, Jinkyu

2013-01-01T23:59:59.000Z

100

Synthesis and characterization of visible emission from rare-earth doped aluminum nitride, gallium nitride and gallium aluminum nitride powders and thin films  

E-Print Network (OSTI)

74 (19) 2821 (1999). F. H. Spedding, Rare-earth Elements, inby the use of rare- earth elements as color emitters inpowders activated with rare-earth elements Eu 3+ , Tb 3+ ,

Tao, Jonathan Huai-Tse

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Rare earth element transport in the Yucca Mountain region.  

E-Print Network (OSTI)

??In sync with environmental pollution of solutes in nature, from source, process to consequence, geochemical processes (leaching and sorption) and hydraulic transportation of the rare… (more)

Zhang, Liqiong

2010-01-01T23:59:59.000Z

102

Anisotropic magnetic properties of light rare-earth diantimonides  

SciTech Connect

Results are presented of anisotropic temperature and field-dependent magnetization M(H,T) and resistivity {rho}(H,T) measurements on high quality single crystals of the light rare-earth diantimonides RSb{sub 2}, R=La-Nd, Sm. All of these, excepting LaSb{sub 2}, magnetically order at low temperatures, and for CeSb{sub 2} and NdSb{sub 2} several magnetically ordered phases were observed in low-field magnetization and zero-field resistivity measurements. For R=Ce-Sm strong anisotropies, associated with crystalline electric field (CEF) splitting of the R{sup 3+} ion, were found in M(T) measurements both below and above magnetic ordering temperatures. Furthermore, for R=Ce-Nd metamagnetic transitions were observed in M(H) and {rho}(H) for H{parallel}(ab) in the magnetically ordered state. In addition, above 15 kG de Haas{endash}van Alphen oscillations are observed for SmSb{sub 2} and Shubnikov{endash}de Haas quantum oscillations are observed above {approximately}120kG for NdSb{sub 2} and SmSb{sub 2}. The zero-field in-plane resistivity {rho}{sub ab} of all of the compounds is metallic (d{rho}/dT{gt}0), with residual resistance ratios ranging from 40 to 750. The c-axis resistivity is also metallic, but appears to be considerably larger than the in-plane value, consistent with the diantimonides being quasi-two-dimensional materials. The magnetoresistance of all members of the series is large, approximately linear in H at moderate fields, and is also dependent on the relative orientation of the applied magnetic fields to the crystallographic axes. The extreme case of SmSb{sub 2} has [{rho}(55kG){minus}{rho}(0)]/{rho}(0){gt}50000{percent} at T=2K and H{parallel}c. {copyright} {ital 1998} {ital The American Physical Society}

Budko, S.L.; Canfield, P.C. [Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)] [Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States); Mielke, C.H.; Lacerda, A.H. [National High Magnetic Field Laboratory, Los Alamos Facility, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [National High Magnetic Field Laboratory, Los Alamos Facility, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

1998-06-01T23:59:59.000Z

103

Microsoft Word - ARPA-E_RareEarth_Workshop_Overview_v6  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ARPA-E WORKSHOP ARPA-E WORKSHOP Rare Earth and Critical Materials December 6, 2010 in Arlington, VA Background ...................................................................................................................................................................................... 2 Breakout Sessions and Participant Preparation .............................................................................................................. 8 Agenda ................................................................................................................................................................................................ 9 Contact Information ................................................................................................................................................................... 10

104

Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Materials for a Clean Energy Future Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Materials for a Clean Energy Future December 3, 2010 Session A: Setting the Scene - Critical Materials for a Clean Energy Future Diana Bauer, Office of Policy and International Affairs, U.S. Department of Energy, Highlights of the DOE Critical Materials Strategy Antje Wittenberg, Directorate General for Enterprise and Industry, The EU Raw Materials Initiative and the Report of the Ad-hoc Group (tbc) Tom Lograsso, Ames Laboratory (Iowa State University), Future Directions in Rare Earth Research: Critical Materials for 21st Century Industry Derk Bol, Materials Innovation Institute M2i (Netherlands) M2i, Material

105

Development of the Polish wasteless technology of apatite phosphogypsum utilization with recovery of rare earths  

Science Journals Connector (OSTI)

The most promising source of rare earth elements in Poland is apatite phosphogypsum, a waste product obtained in the process of phosphoric acid production from Kola apatite. Depending on the technology used, as the hydration ratio of calcium sulphate is changed from hemihydrate to dihydrate, the content of rare earths varies from 0.6% to 0.3% Ln2O3 respectively. Technological flow charts for recovering the rare earths as a byproduct have been developed. The basic process used in the technology consists of three steps: apatite phosphogypsum leaching with dilute sulphuric acid solution; separation of rare earth concentrates from leaching sulphuric acid by preconcentration via evaporization, liquid-liquid extraction or precipitation method; anhydrite production from purified phosphogypsum by recrystallization in concentrated sulphuric acid solution.

A. Jarosi?ski; J. Kowalczyk; Cz. Mazanek

1993-01-01T23:59:59.000Z

106

Origin of enhanced magnetization in rare earth doped multiferroic bismuth ferrite  

SciTech Connect

We report structural and magnetic properties of rare earth doped Bi{sub 0.95}R{sub 0.05} FeO{sub 3} (R?=?Y, Ho, and Er) submicron particles. Rare earth doping enhances the magnetization and the magnetization shows an increasing trend with decreasing dopant ionic radii. In contrast to the x-ray diffraction pattern, we have seen a strong evidence for the presence of rare earth iron garnets R{sub 3}Fe{sub 5}O{sub 12} in magnetization measured as a function of temperature, in selected area electron diffraction, and in Raman measurements. Our results emphasised the role of secondary phases in the magnetic property of rare earth doped BiFeO{sub 3} compounds along with the structural distortion favoring spin canting by increase in Dzyaloshinskii-Moriya exchange energy.

Nayek, C.; Thirmal, Ch.; Murugavel, P., E-mail: muruga@iitm.ac.in [Department of Physics, Indian Institute of Technology Madras, Chennai 36 (India); Tamilselvan, A.; Balakumar, S. [National Centre for Nanoscience and Nanotechnology, University of Madras, Chennai 25 (India)

2014-02-21T23:59:59.000Z

107

Recycling Rare Earth Elements from Industrial Wastewater with Flowerlike Nano-Mg(OH)2  

Science Journals Connector (OSTI)

Recycling Rare Earth Elements from Industrial Wastewater with Flowerlike Nano-Mg(OH)2 ... The pilot-scale experiment indicated that the self-supported flowerlike nano-Mg(OH)2 had great potential to recycle REEs from industrial wastewater. ...

Chaoran Li; Zanyong Zhuang; Feng Huang; Zhicheng Wu; Yangping Hong; Zhang Lin

2013-09-13T23:59:59.000Z

108

Synthesis, Computations and Characterizations of Low Dimensional Rare-Earth Compounds  

E-Print Network (OSTI)

Reduced rare-earth (Ln, lanthanide elements) compounds with low-dimensional Ln-Ln-bonded structures are promising candidates for magnetic materials because Ln-Ln-bonded molecules and solids have delocalized 5d electrons that make strong magnetic...

Chen, Chun-Yu

2014-04-28T23:59:59.000Z

109

Tricking Iron into Acting like a Rare-earth Element | The Ames...  

NLE Websites -- All DOE Office Websites (Extended Search)

Tricking Iron into Acting like a Rare-earth Element By slipping iron between two nitrogen atoms in a lithium matrix, researchers are able to trick iron into having magnetic...

110

Geochemistry of dissolved rare earth elements in the Equatorial Pacific Ocean  

Science Journals Connector (OSTI)

Seawater samples were collected from four locations in the Equatorial Pacific Ocean during the MR02-K06 cruise of the R/V Mirai...and analyzed for dissolved rare earth elements (REEs) using inductively coupled pl...

Zhong-Liang Wang; Masatoshi Yamada

2007-04-01T23:59:59.000Z

111

ACCEPTED MANUSCRIPT The behaviour of Rare-Earth Elements, Zr and Hf during biologically-mediated  

E-Print Network (OSTI)

ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 1 The behaviour of Rare-Earth Elements, Zr and Hf during.a,b* , Cangemi M.a , Brusca L.c , Madonia P.c , Saiano F.d , Zuddas P.e a) Department of Earth and Marine at the solid-liquid interface influencing the distribution of trace elements onto microbial surfaces. Since

112

Rare earth element partitioning between titanite and silicate melts: Henry's law revisited  

E-Print Network (OSTI)

Rare earth element partitioning between titanite and silicate melts: Henry's law revisited Stefan earth elements (REE) between titanite and a range of different silicate melts. Our results show. For geochemical modelling of magmatic processes involving titanite, and indeed other accessory phases

113

Rare Isotopes in Cosmic Explosions and Accelerators on Earth  

ScienceCinema (OSTI)

Rare isotopes are nature?s stepping stones to produce the heavy elements, and they are produced in large quantities in stellar explosions. Despite their fleeting existence, they shape the composition of the universe and the observable features of stellar explosions. The challenge for nuclear science is to produce and study the very same rare isotopes so as to understand the origin of the elements and a range of astronomical observations. I will review the progress that has been made to date in astronomy and nuclear physics, and the prospects of finally addressing many of the outstanding issues with the future Facility for Rare Isotope Beams (FRIB), which DOE will build at Michigan State University.

Hendrik Schatz

2010-01-08T23:59:59.000Z

114

PII S0016-7037(00)00772-4 Rare earth element variations resulting from inversion of pigeonite and subsolidus  

E-Print Network (OSTI)

PII S0016-7037(00)00772-4 Rare earth element variations resulting from inversion of pigeonite ion mass spectrometry study of the rare earth elements (REEs) in the minerals of two samples of lunar earth element (REE) composi- tions of the minerals in the subgroups of lunar ferroan anortho- sites

115

10 Questions for a Materials Scientist: Mr. Rare Earth -- Dr. Karl A.  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Materials Scientist: Mr. Rare Earth -- Dr. Karl Materials Scientist: Mr. Rare Earth -- Dr. Karl A. Gschneidner, Jr. 10 Questions for a Materials Scientist: Mr. Rare Earth -- Dr. Karl A. Gschneidner, Jr. April 3, 2013 - 12:59pm Addthis Dr. Karl Gschneidner is holding a neodymium-iron-boron magnet produced using a new, greener process. The process that Dr. Gschneidner helped develop doesn’t produce the environmentally unfriendly byproducts that result from traditional manufacturing methods. | Photo courtesy of Ames Laboratory. Dr. Karl Gschneidner is holding a neodymium-iron-boron magnet produced using a new, greener process. The process that Dr. Gschneidner helped develop doesn't produce the environmentally unfriendly byproducts that result from traditional manufacturing methods. | Photo courtesy of Ames

116

High Pressure Phase Transformations in Heavy Rare Earth Metals and Connections to Actinide Crystal Structures  

SciTech Connect

High-pressure studies have been performed on heavy rare earth metals Terbium (Tb) to 155 GPa and Holmium (Ho) to 134 GPa in a diamond anvil cell at room temperature. The following crystal structure sequence was observed in both metals hcp {yields} Sm-type {yields} dhcp {yields} distorted fcc (hR-24) {yields} monoclinic (C2/m) with increasing pressure. The last transformation to a low symmetry monoclinic phase is accompanied by a volume collapse of 5 % for Tb at 51 GPa and a volume collapse of 3 % for Ho at 103 GPa. This volume collapse under high pressure is reminiscent of f-shell delocalization in light rare earth metal Cerium (Ce), Praseodymium (Pr), and heavy actinide metals Americium (Am) and Curium (Cm). The orthorhombic Pnma phase that has been reported in Am and Cm after f-shell delocalization is not observed in heavy rare earth metals under high pressures. (authors)

Vohra, Yogesh K.; Sangala, Bagvanth Reddy; Stemshorn, Andrew K. [Physics, University of Alabama at Birmingham (UAB), 310 Campbell Hall, 1300 University Boulevard, Birmingham, AL, 35294-1170 (United States); Hope, Kevin M. [Biology, Chemistry, and Mathematics, University of Montevallo, Harman Hall, Station 6480, Montevallo, AL, 35115 (United States)

2008-07-01T23:59:59.000Z

117

The effect of rare earth elements on the texture and formability of asymmetrically rolled magnesium sheet  

SciTech Connect

The lack of formability is a serious issue when considering magnesium alloys for various applications. Standard symmetric rolling introduces a strong basal texture that decreases the formability; however, asymmetric rolling has been put forward as a possible route to produce sheet with weaker texture and greater ductility. It has also been shown in recent work that weaker textures can be produced through the addition of rare earth elements to magnesium alloys. Therefore, this study has been carried out to investigate the effect of rare earth additions on the texture changes during asymmetric rolling. Two alloys have been used, AZ31B and ZEK100. The effect that the rare earth additions have on the texture of asymmetrically rolled sheet and the subsequent changes in formability will be discussed.

Alderman, Dr. Martyn [Magnesium Elektron North America; Cavin, Odis Burl [ORNL; Davis, Dr. Bruce [Magnesium Elektron North America; Muralidharan, Govindarajan [ORNL; Muth, Thomas R [ORNL; Peter, William H [ORNL; Randman, David [Magnesium Elektron North America; Watkins, Thomas R [ORNL

2011-01-01T23:59:59.000Z

118

Method of forming magnetostrictive rods from rare earth-iron alloys  

DOE Patents (OSTI)

Rods of magnetostrictive alloys of iron with rare earth elements are formed by flowing a body of rare earth-iron alloy in a crucible enclosed in a chamber maintained under an inert gas atmosphere, forcing such molten rare-earth-iron alloy into a hollow mold tube of refractory material positioned with its lower end portion within the molten body by means of a pressure differential between the chamber and mold tube and maintaining a portion of the molten alloy in the crucible extending to a level above the lower end of the mold tube so that solid particles of higher melting impurities present in the alloy collect at the surface of the molten body and remain within the crucible as the rod is formed in the mold tube. 5 figs.

McMasters, O.D.

1986-09-02T23:59:59.000Z

119

A programme for electron-impact broadening parameter calculations of ionized rare-earth element lines  

E-Print Network (OSTI)

In order to provide atomic data needed for astrophysical investigations, a set of electron-impact broadening parameters for ionized rare-earth element lines should be calculated. We are going to calculate the electron-impact broadening parameters for more than 50 transitions of ionized rare-earth elements. Taking into account that the spectra of these elements are very complex, for calculation we can use the modified semiempirical approach - MSE or simplified MSE. Also, we can estimate these parameters on the basis of regularities and systematic trends.

L. C. Popovic; M. S. Dimitrijevic

1998-05-15T23:59:59.000Z

120

Magnetic properties of rare-earth antiferromagnets studied using a two-ion model  

Science Journals Connector (OSTI)

In this paper, a two-ion model for rare-earth antiferromagnets is proposed and employed to describe the magnetic behavior of HoNi2B2C and DyFe2Si2 at low temperatures. The calculated temperature dependence of the susceptibilities and magnetizations along the hard and easy directions, respectively, shows very good agreement with experimental results.

Z.-S. Liu; M. Diviš; V. Sechovský

2008-12-05T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Thermal treatment for increasing magnetostrictive response of rare earth-iron alloy rods  

DOE Patents (OSTI)

Magnetostrictive rods formed from rare earth-iron alloys are subjected to a short time heat treatment to increase their magnetostrictive response under compression. The heat treatment is preferably carried out at a temperature of from 900 to 1,000 C for 20 minutes to six hours.

Verhoeven, J.D.; McMasters, O.D.

1989-07-18T23:59:59.000Z

122

Ternary rare earth-lanthanide sulfides. [Re = Eu, Sm or Yb  

DOE Patents (OSTI)

Disclosed is a new ternary rare earth sulfur compound having the formula La/sub 3-x/M/sub x/S/sub 4/, where M is europium, samarium, or ytterbium, with x = 0.15 to 0.8. The compound has good high-temperature thermoelectric properties and exhibits long-term structural stability up to 1000/sup 0/C.

Takeshita, Takuo; Gschneidner, K.A. Jr.; Beaudry, B.J.

1986-03-06T23:59:59.000Z

123

Hydrogen absorption characteristics of oxygen-stabilized rare-earth iron intermetallic compounds  

E-Print Network (OSTI)

Hydrogen absorption characteristics of oxygen-stabilized rare-earth iron intermetallic compounds M Abstract. -- The thermal behavior of oxygen-stabilized RjFegO^-hydrogen (R = Y, Dy, Ho) systems was studied decade to the study of the hydrogenation characte- ristics of a variety of intermetallic compounds, our

Paris-Sud XI, Université de

124

Cubic rare-earth compounds: Variants of the three-state Potts model  

Science Journals Connector (OSTI)

In appropriate cubic fields rare-earth ions have sixfold degenerate ground states. When the angular momentum of the rare earth is large, the six levels are characterized by states that are directed along the cube edges. Within these states the angular momentum operators Jx, Jy, and Jz have particularly simple matrix representations. The projection of an isotropic pair coupling between the rare earths onto these sixfold degenerate states leads to an interaction Hamiltonian H=-I??ij??i?j?lilj, where ? takes on the values ± 1 and l the values x, y, and z. This interaction is a variant of the three-state Potts model. We add magnetic and quadrupolar anisotropy field terms to the Hamiltonian and determine the symmetry properties of the phase diagram associated with this model. For nonzero quadrupolar anisotropy fields, the model is shown to have the thermodynamic behavior of an Ising model. However, for zero fields we find a new symmetry appears and in the mean-field approximation the model has tricritical-like exponents. This simple model is able to account for the large specific-heat critical exponent ??=12 which has been observed for holmium antimonide in zero external fields. To the extent that the mean-field approximation is an accurate guide, we predict there are many cubic rare-earth compounds which exhibit tricritical-like behavior in zero field. In addition we find that for pure quadrupole coupling between rare earths in the sixfold degenerate states, the interaction Hamiltonian is exactly the three-state Potts model. In the mean-field approximation this system has a first-order phase transition. However, a small quadrupolar anisotropy field is sufficient to drive the system to a wing critical point. The specific heat has a critical exponent of ?=23 or 1 depending on the path taken to approach this critical point.

D. Kim; Peter M. Levy; L. F. Uffer

1975-08-01T23:59:59.000Z

125

Rare Earth Element sorption by basaltic rock: experimental data and modeling results using the "Generalised Composite approach".  

E-Print Network (OSTI)

Rare Earth Element sorption by basaltic rock: experimental data and modeling results using Email address : emmanuel.tertre@univ-poitiers.fr Keywords: sorption, lanthanides, basalt, surface.1016/j.gca.2007.12.015 #12;Abstract Sorption of the 14 Rare Earth Elements (REE) by basaltic rock

Paris-Sud XI, Université de

126

Carbide/nitride grain refined rare earth-iron-boron permanent magnet and method of making  

DOE Patents (OSTI)

A method of making a permanent magnet is disclosed wherein (1) a melt is formed having a base alloy composition comprising RE, Fe and/or Co, and B (where RE is one or more rare earth elements) and (2) TR (where TR is a transition metal selected from at least one of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and Al) and at least one of C and N are provided in the base alloy composition melt in substantially stoichiometric amounts to form a thermodynamically stable compound (e.g. TR carbide, nitride or carbonitride). The melt is rapidly solidified in a manner to form particulates having a substantially amorphous (metallic glass) structure and a dispersion of primary TRC, TRN and/or TRC/N precipitates. The amorphous particulates are heated above the crystallization temperature of the base alloy composition to nucleate and grow a hard magnetic phase to an optimum grain size and to form secondary TRC, TRN and/or TRC/N precipitates dispersed at grain boundaries. The crystallized particulates are consolidated at an elevated temperature to form a shape. During elevated temperature consolidation, the primary and secondary precipitates act to pin the grain boundaries and minimize deleterious grain growth that is harmful to magnetic properties. 33 figs.

McCallum, R.W.; Branagan, D.J.

1996-01-23T23:59:59.000Z

127

Ultracold chemistry with alkali-metal-rare-earth molecules  

E-Print Network (OSTI)

A first principles study of the dynamics of $^6$Li($^{2}$S) + $^6$Li$^{174}$Yb($^2\\Sigma^+$)$ \\to ^6$Li$_2(^1\\Sigma^+$) + $^{174}$Yb($^1$S) reaction is presented at cold and ultracold temperatures. The computations involve determination and analytic fitting of a three-dimensional potential energy surface for the Li$_2$Yb system and quantum dynamics calculations of varying complexities, ranging from exact quantum dynamics within the close-coupling scheme, to statistical quantum treatment, and universal models. It is demonstrated that the two simplified methods yield zero-temperature limiting reaction rate coefficients in reasonable agreement with the full close-coupling calculations. The effect of the three-body term in the interaction potential is explored by comparing quantum dynamics results from a pairwise potential that neglects the three-body term to that derived from the full interaction potential. Inclusion of the three-body term in the close-coupling calculations was found to reduce the limiting rate coefficients by a factor of two. The reaction exoergicity populates vibrational levels as high as $v=19$ of the $^6$Li$_2$ molecule in the limit of zero collision energy. Product vibrational distributions from the close-coupling calculations reveal sensitivity to inclusion of three-body forces in the interaction potential. Overall, the results indicate that a simplified model based on the long-range potential is able to yield reliable values of the total reaction rate coefficient in the ultracold limit but a more rigorous approach based on statistical quantum or quantum close-coupling methods is desirable when product rovibrational distribution is required.

C. Makrides; J. Hazra; G. B. Pradhan; A. Petrov; B. K. Kendrick; T. González-Lezana; N. Balakrishnan; S. Kotochigova

2014-10-28T23:59:59.000Z

128

Microsoft Word - US-EU WORKSHOP on RARE EARTHS Program 20101206  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Trans-Atlantic Workshop Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Materials for a Clean Energy Future Hosted by the MIT Energy Initiative Massachusetts Institute of Technology 400 Main Street, Building E19-307, Cambridge, Massachusetts December 3, 2010 Workshop Background Rare earth elements and other critical raw materials are essential to our industrial production, particularly for clean energy options like wind turbines, solar cells, electric vehicles, and energy- efficient lighting. Wind turbines are the most rapidly growing source of electricity generation in both Europe and the United States. Solar photovoltaic cells are steadily declining in cost, and their widespread, cost-effective use on power grids is anticipated within the coming decade.

129

Charge screening and magnetic anisotropy in metallic rare-earth systems  

Science Journals Connector (OSTI)

The calculation of magnetic anisotropy constants is performed beyond the point-charge model for a continuous charge-density distribution of screening conduction electrons. An important role of the nonuniform electron density, in particular, of the Friedel oscillations, in the formation of crystal field is demonstrated. Such effects can modify strongly the effective ion (impurity) charge and even change its sign. This enables one to justify the anion model, which is often used for discussing experimental data on hydrogen-containing systems. Possible applications to the pure rare-earth metals and RCo5 (R=rare earth) compounds are discussed. The deformation of magnetic structure near the interstitial positive muon owing to the strong local anisotropy, and the corresponding contribution to the dipole field at the muon are considered.

V. Yu. Irkhin and Yu. P. Irkhin

1998-02-01T23:59:59.000Z

130

New model for the mixed-valence phenomenon in rare-earth materials  

Science Journals Connector (OSTI)

A model of a single rare-earth atom in a transition metal is derived, and terms describing screening of charge fluctuations in the resonant l=3 scattering channels by the l=2 channels are included. Using the Tomonaga approximation, in which charge fluctuations are represented by bosons, the screening channels are replaced by a boson field, and the model takes on a particularly simple form, the Anderson model of a magnetic impurity, now coupled to the boson field. The mean-field theory of this model suggests that, unlike in the original Anderson model, the impurity can be in a state of slowly fluctuating valence, which we identify with the mixed-valence phenomenon in certain rare-earth materials. These results suggest that the mixed-valence effect may be purely electronic in origin.

F. D. M. Haldane

1977-03-01T23:59:59.000Z

131

Iron-Nitride Alloy Magnets: Transformation Enabled Nitride Magnets Absent Rare Earths (TEN Mare)  

SciTech Connect

REACT Project: Case Western is developing a highly magnetic iron-nitride alloy to use in the magnets that power electric motors found in EVs and renewable power generators. This would reduce the overall price of the motor by eliminating the expensive imported rare earth minerals typically found in today’s best commercial magnets. The iron-nitride powder is sourced from abundant and inexpensive materials found in the U.S. The ultimate goal of this project is to demonstrate this new magnet system, which contains no rare earths, in a prototype electric motor. This could significantly reduce the amount of greenhouse gases emitted in the U.S. each year by encouraging the use of clean alternatives to oil and coal.

None

2012-01-01T23:59:59.000Z

132

X-ray resonant exchange scattering of rare-earth nickel borocarbides  

SciTech Connect

The purpose of this thesis is to investigate the systematics of the microscopic magnetic order within a series of isostructural compounds and, at the same, to develop the relatively young experimental method of x-ray resonant exchange scattering (XRES). In this thesis, the author presents XRES studies of several rare-earth nickel borocarbides, RNi{sub 2}B{sub 2}C. He shows that XRES, similar to the neutron techniques, allows the determination of the orientation of the magnetic moment by measuring the Q-dependence of the scattered intensity of magnetic Bragg reflections. As samples in this study, he chose the recently discovered family of rare-earth nickel borocarbides, RNi{sub 2}B{sub 2}C, which display a wide variety of magnetic structures. Furthermore, in several of these materials, long range magnetic order coexists with superconductivity over some temperature range.

Detlefs, C.

1997-10-08T23:59:59.000Z

133

Maria Goeppert Mayer's Theoretical Work on Rare-Earth and Transuranic Elements  

E-Print Network (OSTI)

After the discovery of element 93 neptunium by Edwin McMillan and Philip H. Abelson in 1941, Maria Goeppert Mayer applied the Thomas-Fermi model to calculate the electronic configuration of heavy elements and predicted the occurrence of a second rare-earth series in the vicinity of elements 91 or 92 extending to the transuranic elements. Mayer was motivated by Enrico Fermi, who was at the time contemplating military uses of nuclear energy. Historical development of nuclear science research leading to Mayer's publication is outlined. Mayer's method is introduced with the aid of a computer, which enables students to visualize her description of eigenfunctions, particularly the sudden change of spatial distribution and eigenenergy at the beginning of the rare-earth series. The impact of Mayer's work on the periodic table is discussed.

Wang, Frank Y

2008-01-01T23:59:59.000Z

134

Pt nanoparticles modified by rare earth oxides: Electronic effect and influence to catalytic hydrogenation of 3-phenoxybenzaldehyde  

SciTech Connect

Graphical abstract: - Highlights: • The rare earths modified Pt/Al{sub 2}O{sub 3} were prepared by colloidal deposition method. • Modification of Pt by the rare earth enhanced catalytic hydrogenation activity. • The activity improvement is due to electron interaction between Pt and rare earth. • The hydrogenation mechanism of rare earth modified Pt catalyst was proposed. - Abstract: The rare earth elements (La, Ce, Nd, Sm, Pr, and Gd) modified Pt/Al{sub 2}O{sub 3} catalysts were prepared by the colloidal deposition and chemical reduction methods, respectively. Pt nanoparticles with average size 3 ± 0.5 nm were uniformly dispersed on the surface of Al{sub 2}O{sub 3} for the samples prepared by the colloidal deposition method, which exhibited higher activities in the hydrogenation of 3-phenoxybenzadehyde than the corresponding samples prepared by chemical reduction method. Moreover, except Gd, the catalysts modified by rare earth elements showed better catalytic performance than unmodified Pt/Al{sub 2}O{sub 3}. For Pt–Ce/Al{sub 2}O{sub 3} catalyst, when the weight percent of Pt and Ce was 0.5 and 0.25, respectively, the hydrogenation conversion of 3-phenoxybenzaldehyde was 97.3% after 6 h reaction. This activity improvement is due to the electronic interaction between Pt and rare earth elements, which was investigated by X-ray photoelectron spectroscopy.

Mou, Zhigang; Han, Ming; Li, Gang; Du, Yukou [College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China); Yang, Ping, E-mail: pyang@suda.edu.cn [College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China); Zhang, Hailu [Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123 (China); Deng, Zongwu, E-mail: zwdeng2007@sinano.ac.cn [Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123 (China)

2013-11-15T23:59:59.000Z

135

Rare-earth amorphous alloys: Nonaxial crystal-field model and induced magnetism  

Science Journals Connector (OSTI)

The consequences of the induced magnetism on amorphous rare-earth systems with singlet ground state are analyzed on the basis of the Fert and Campbell Hamiltonian assuming a suitable distribution of the asymmetry parameter. The formal treatment is developed for both the ferromagnetic and antiferromagnetic interaction in the molecular-field approximation. The magnetization, the specific heat, and the magnetic susceptibility of Pr amorphous alloys, in particular, are discussed.

E. Borchi and S. De Gennaro

1982-02-01T23:59:59.000Z

136

Tunneling Model of Phase Changes in Tetragonal Rare-Earth Crystals  

Science Journals Connector (OSTI)

The crystal-field theory for a rare-earth ion in tetragonal symmetry is studied in a semiclassical description. The low-lying quantum states are interpreted as tunneling states between classical minima. At low temperatures, spontaneous lattice distortions occur to lower some of the minima relative to others. The model is applied to DyVO4 and TbVO4 and is shown to lead to a good understanding of why they show phase changes and unusual paramagnetic properties.

E. Pytte and K. W. H. Stevens

1971-09-27T23:59:59.000Z

137

Self-assembled rare-earth silicide nanowires on Si(001)  

SciTech Connect

This paper presents scanning tunneling microscope images of several rare-earth metal silicides grown on silicon (001). For certain of the metals studied (Dy, Ho), an anisotropy in lattice match with the substrate results in the formation of nanowires. These nanowires have desirable properties such as nanometer lateral dimension, crystalline structure with a low density of defects, and micrometer scale length. Tunneling spectroscopy on the nanowires indicates that they are metallic.

Nogami, J.; Liu, B. Z.; Katkov, M. V.; Ohbuchi, C.; Birge, Norman O.

2001-06-15T23:59:59.000Z

138

Method of increasing magnetostrictive response of rare earth-iron alloy rods  

DOE Patents (OSTI)

This invention comprises a method of increasing the magnetostrictive response of rare earth-iron (RFe) magnetostrictive alloy rods by a thermal-magnetic treatment. The rod is heated to a temperature above its Curie temperature, viz. from 400 to 600 C; and, while the rod is at that temperature, a magnetic field is directionally applied and maintained while the rod is cooled, at least below its Curie temperature. 2 figs.

Verhoeven, J.D.; McMasters, O.D.; Gibson, E.D.; Ostenson, J.E.; Finnemore, D.K.

1989-04-04T23:59:59.000Z

139

Synthesis of metastable rare-earth-iron mixed oxide with the hexagonal crystal structure  

SciTech Connect

Rare-earth-iron mixed oxides with the rare earth/iron ratio=1 have either orthorhombic (o-REFeO{sub 3}) or hexagonal (h-REFeO{sub 3}) structure. h-REFeO{sub 3} is a metastable phase and the synthesis of h-REFeO{sub 3} is usually difficult. In this work, the crystallization process of the precursors obtained by co-precipitation and Pechini methods was investigated in detail to synthesize h-REFeO{sub 3}. It was found that the crystallization from amorphous to hexagonal phase and the phase transition from hexagonal to orthorhombic phase occurred at a similar temperature range for rare earth elements with small ionic radii (Er-Lu, Y). For both co-precipitation and Pechini methods, single-phase h-REFeO{sub 3} was obtained by shortening the heating time during calcination process. The hexagonal-to-orthorhombic phase transition took place by a nucleation growth mechanism and vermicular morphology of the thus-formed orthorhombic phase was observed. The hexagonal YbFeO{sub 3} had higher catalytic activity for C{sub 3}H{sub 8} combustion than orthorhombic YbFeO{sub 3}. - Graphical abstract: Although the synthesis of metastable hexagonal REFeO{sub 3} by the conventional method is difficult, we found that this phase is obtained by shortening the heating time of the precursor prepared by co-precipitation method. Highlights: Black-Right-Pointing-Pointer Synthesis of metastable REFeO{sub 3} with hexagonal structure by the co-precipitation method. Black-Right-Pointing-Pointer Hexagonal REFeO{sub 3} is obtained for the rare earth elements with small ionic radii. Black-Right-Pointing-Pointer Hexagonal-to-orthorhombic transformation of REFeO{sub 3}. Black-Right-Pointing-Pointer Catalytic activity of hexagonal REFeO{sub 3} for C{sub 3}H{sub 8} combustion.

Nishimura, Tatsuya [Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510 (Japan); Hosokawa, Saburo, E-mail: hosokawa@scl.kyoto-u.ac.jp [Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510 (Japan); Masuda, Yuichi; Wada, Kenji; Inoue, Masashi [Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510 (Japan)

2013-01-15T23:59:59.000Z

140

Classical spin model of the relaxation dynamics of rare-earth doped permalloy  

Science Journals Connector (OSTI)

In this paper, the ultrafast dynamic behavior of rare-earth doped permalloy is investigated using an atomistic spin model with Langevin dynamics. In line with experimental work, the effective Gilbert damping is calculated from transverse relaxation simulations, which shows that rare-earth doping causes an increase in the damping. Analytic theory suggests that this increase in damping would lead to a decrease in the demagnetization time. However, longitudinal relaxation calculations show an increase with doping concentration instead. The simulations are in a good agreement with previous experimental work of Radu et al. [Radu et al., Phys. Rev. Lett. 102, 117201 (2009)]. The longitudinal relaxation time of the magnetization is shown to be driven by the interaction between the transition metal and the laser-excited conduction electrons, whereas the effective damping is predominantly determined by the slower interaction between the rare-earth elements and the phonon heat bath. We conclude that for complex materials, it is evidently important not to expect a single damping parameter but to consider the energy transfer channel relevant to the technique and time scale of the measurement.

M. O. A. Ellis; T. A. Ostler; R. W. Chantrell

2012-11-19T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Melted Murataite Ceramics Containing Simulated Actinide/Rare Earth Fraction of High Level Waste  

SciTech Connect

Murataite-based ceramics with three different chemical compositions containing simulated actinide/rare earth (RE) fraction of HLW were produced in a resistive furnace at a temperature of 1500 deg. C and two of them - in a cold crucible energized from a 5.28 MHz/10 kW high frequency generator. All the samples prepared in resistive furnace were composed of major murataite and minor perovskite, crichtonite, zirconolite, and pyrophanite/ilmenite. The samples produced in the cold crucible were composed of murataite, perovskite, crichtonite, and rutile. Higher content of perovskite and crichtonite in the cold crucible melted ceramic than in the ceramic with the same chemical composition but melted in resistive furnace may be due to higher temperature in the cold crucible (up to 1600-1650 deg. C) at which some fraction of murataite was subjected to decomposition yielding additional amount of perovskite and crichtonite. Method of melting may effect on elemental partitioning in the murataite-containing ceramics because light (Ce-group) REs enter preferably perovskite phase whereas Nd, Sm, and heavy (Y-group) REs are accommodated in the murataite polytypes. Thus, perovskite and murataite are major host phases for the Ce- and Y-group REs, respectively, whereas tetravalent actinides (U) enter murataite only.

Stefanovsky, S.V.; Ptashkin, A.G.; Knyazev, O.A.; Zen'kovskaya, M.S.; Stefanovsky, O.I. [State Unitary Enterprise SIA Radon, Moscow (Russian Federation); Yudintsev, S.V.; Nikonov, B.S.; Lapina, M.I. [Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian, Academy of Sciences (IGEM RAS), Moscow (Russian Federation)

2008-07-01T23:59:59.000Z

142

Upconversion-pumped luminescence efficiency of rare-earth-doped hosts sensitized with trivalent ytterbium  

SciTech Connect

We discuss the upconversion luminescence efficiencies of phosphors that generate red, green, and blue light. The phosphors studied are single crystals and powders co-doped with Er{sup 3+} and Yb{sup 3+}, and with Tm{sup 3+} and Yb{sup 3+}. The Yb ions are pumped near 980 nm; transfers of two or three quanta to the co-doped rare earth ion generate visible luminescence. The main contribution embodied in this work is the quantitative measurement of this upconversion efficiency, based on the use of a calibrated integrating sphere, determination of the fraction of pump light absorbed, and careful control of the pump laser beam profile. The green phosphors are the most efficient, yielding efficiency values as high as 4 %, with the red and blue materials giving 1 - 2 %. Saturation was observed in all cases, suggesting that populations of upconversion steps of the ions are maximized at higher power. Quasi-CW modeling of the intensity- dependent upconversion efficiency was attempted; input data included level lifetimes, transition cross sections, and cross-relaxation rate coefficients. The saturation of the Yb,Er:fluoride media is explained as the pumping of Er{sup 3+} ions into a bottleneck (long-lived state)- the {sup 4}I{sub 13/2} metastable level, making them unavailable for further excitation transfer. 32 refs., 5 figs., 3 tabs.

Page, R.H.; Schaffers, K.I.; Waide, P.A.; Tassano, J.B.; Payne, S.A.; Kruplce, W.F.; Bischel, W.K. [Gemfire Corporation, Palo Alto, CA (United States)

1997-07-26T23:59:59.000Z

143

Journal of the Korean Physical Society, Vol. 38, No. 6, June 2001, pp. 744749 Photoemission Study of Rare-Earth Ditelluride Compounds  

E-Print Network (OSTI)

levels of the rare-earth elements, we found that all the rare-earth elements were trivalent. We also made for the rare-earth elements, and found that the La and Gd 3d peaks were well explained by our calculations. There was very little change in the lineshapes of the Te 3d peaks of different rare-earth elements. On the other

Oh, Se-Jung

144

Robust quantum gates and a bus architecture for quantum computing with rare-earth-ion doped crystals  

E-Print Network (OSTI)

We present a composite pulse controlled phase gate which together with a bus architecture improves the feasibility of a recent quantum computing proposal based on rare-earth-ion doped crystals. Our proposed gate operation is tolerant to variations between ions of coupling strengths, pulse lengths, and frequency shifts, and it achieves worst case fidelities above 0.999 with relative variations in coupling strength as high as 10% and frequency shifts up to several percent of the resonant Rabi frequency of the laser used to implement the gate. We outline an experiment to demonstrate the creation and detection of maximally entangled states in the system.

Janus Wesenberg; Klaus Moelmer

2003-01-09T23:59:59.000Z

145

Parity assignments in Yb172,174 using polarized photons and the K quantum number in rare earth nuclei  

Science Journals Connector (OSTI)

The 100% polarized photon beam at the high intensity ? ray source (HI?S) at Duke University has been used to determine the parity of six dipole excitations between 2.9 and 3.6 MeV in the deformed nuclei Yb172,174 in photon scattering (??,?') experiments. The measured parities are compared with previous assignments based on the K quantum number that had been assigned in nuclear resonance fluorescence (NRF) experiments by using the Alaga rules. A systematic survey of the relation between ?-decay branching ratios and parity quantum numbers is given for the rare earth nuclei.

D. Savran; S. Müller; A. Zilges; M. Babilon; M. W. Ahmed; J. H. Kelley; A. Tonchev; W. Tornow; H. R. Weller; N. Pietralla; J. Li; I. V. Pinayev; Y. K. Wu

2005-03-08T23:59:59.000Z

146

Pourret Olivier, Gruau Grard, Dia Aline, Davranche Mlanie, and Molnat Jrome. (2010) Colloidal control on the distribution of rare earth elements in shallow  

E-Print Network (OSTI)

control on the distribution of rare earth elements in shallow groundwaters. Aquatic Geochemistry 16 (1 OF RARE EARTH ELEMENTS IN SHALLOW GROUNDWATERS Olivier Pourret1, 2, § , Gérard Gruau1,* , Aline Dia1;3 Abstract A 7-year monitoring period of rare earth element (REE) concentrations and REE pattern shapes

Paris-Sud XI, Université de

147

Solid-Liquid and Solid-Solid Transformations in the Rare-Earth Metals at High Pressures  

Science Journals Connector (OSTI)

The fusion behavior and solid-solid transformations in the rare-earth metals have been investigated at pressures in the range 6-65 kbar. The phase diagrams are presented for La, Pr, Nd, Sm, Gd, and Tb. The initial melting slopes of Dy to Lu have been obtained. Since most of the rare-earth (R.E.) metals melt from a bcc structure, they offer a series for comparison. When the initial melting slope is plotted against atomic number they fall into groups according to their valency; the typically divalent metals Eu and Yb in one, and the typically trivalent metals La, Gd, and Lu in another. Samarium and the metals from Tb to Tm have melting slopes which are intermediate between those of the typically divalent and trivalent metals. It is suggested that these metals assume a partial divalent character in the liquid state and possibly also in the bcc phase. This suggestion derives support from the fact that the gaseous neutral atoms of the R.E. elements, with the exception of La, Gd, and Lu, have no 5d electron and are therefore divalent. Cerium exhibits a unique fusion behavior and its negative melting slope has been attributed to the tetravalency (4f?5d electron promotion) of the atoms in the liquid. For the very small melting slope of Pr, it is suggested that the atoms in the liquid have partial tetravalent character due to 4f?5d electron promotion. Comparisons with alkali metals are made and it is deduced that the R.E. metals are quite compressible at high temperatures. Pressure induced transformations in the rare-earth metals are in the sequence hcp?Sm-type?double hcp?fcc. A plausible mechanism based on the variation of ca ratio with pressure is discussed for hcp?Sm-type transformation.

A. Jayaraman

1965-08-02T23:59:59.000Z

148

FARVAT: a family-based rare variant association test  

Science Journals Connector (OSTI)

......family-based rare variant association test Sungkyoung Choi 1 Sungyoung Lee 1 Sven...FAmily-based Rare Variant Association Test (FARVAT). FARVAT is based on the quasi-likelihood...working matrix, our method could be a burden test or a variance component test, and could......

Sungkyoung Choi; Sungyoung Lee; Sven Cichon; Markus M. Nöthen; Christoph Lange; Taesung Park; Sungho Won

2014-11-15T23:59:59.000Z

149

Structural transition in rare earth doped zirconium oxide: A positron annihilation study  

SciTech Connect

Graphical abstract: New microstructural analysis and phase transition of rare earth doped mixed oxide compounds such as: Sm{sub 2?x}Dy{sub x}Zr{sub 2}O{sub 7} (where x = 0.0 ? x ? 2.0) that are potentially useful as solid oxide fuels, ionic conductors, optoelectronic materials and most importantly as radiation resistant host for high level rad-waste disposal, structural transition in the system is reported through positron annihilation spectroscopy as there is an indication in the X-ray diffraction analysis. Highlights: ? Zirconium oxide material doped with rare earth ions. ? The method of positron annihilation spectroscopy suggests a phase transition in the system. ? The crystal structure transformation from pure pyrochlore to defect fluorite type of structure is shown by X-ray diffraction results. -- Abstract: A series of compounds with the general composition Sm{sub 2?x}Dy{sub x}Zr{sub 2}O{sub 7} (where 0 ? x ? 2.0) were synthesized by chemical route and characterized by powder X-ray diffraction (XRD) analysis. The rare earth ion namely Sm{sup +3} in the compound was gradually replaced with another smaller and heavier ion, Dy{sup +3} of the 4f series, there by resulting in order–disorder structural transition, which has been studied by positron annihilation lifetime and Doppler broadening spectroscopy. This study reveals the subtle electronic micro environmental changes in the pyrochlore lattice (prevalent due to the oxygen vacancy in anti-site defect structure of the compound) toward its transformation to defect fluorite structure as found in Dy{sub 2}Zr{sub 2}O{sub 7}. A comparison of the changes perceived with PAS as compared to XRD analysis is critically assayed.

Chakraborty, Keka [Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)] [Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India); Bisoi, Abhijit [Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064 (India)] [Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064 (India); Ganguly, Bichitra Nandi, E-mail: bichitra.ganguly@saha.ac.in [Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064 (India); Grover, Vinita; Sayed, Farheen Nasir; Tyagi, A.K. [Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)] [Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)

2012-11-15T23:59:59.000Z

150

Effect of pressure on Knight shifts in rare-earth singlet ground-state systems  

Science Journals Connector (OSTI)

Pressure effects on Knight shifts of rare-earth and pnictide nuclei, contained in intermetallic compounds, have been measured to 4 kbar as a function of temperature from 4 K to as high as 300 K. An attempt to separate the effects of crystal field and exchange was made. Even with the inclusion of exchange (via simple parameterization), the often used point-charge model is unable to account in a straightforward manner for the results. We attribute the behavior to conduction-electron effects.

H. T. Weaver and J. E. Schirber

1976-08-01T23:59:59.000Z

151

Lattice vibration in homogeneously-mixed-valent systems of rare-earth materials  

Science Journals Connector (OSTI)

We investigate the essential feature of interplay between lattice vibration and valence fluctuation in the homogeneously-mixed-valent systems of rare-earth materials rigorously within simple models, paying special attention to studying the collective nature of excitations in lattice vibration as well as in valence fluctuation. We compare our results with experiments and find that the general features of the experiments of Sm0.75Y0.25S are well understood within the present model if we assume the characteristic energy of the valence fluctuation to be comparable to the phonon energy.

S. Ichinose and Y. Kuroda

1982-02-15T23:59:59.000Z

152

Long-Range Order of Dilute Rare-Earth Spin Ensemble Revealed with Cavity QED  

E-Print Network (OSTI)

This work demonstrates strong coupling regime between an Erbium ion spin ensemble and Hybrid Cavity-Whispering Gallery Modes in a Yttrium Aluminium Garnet dielectric crystal. Coupling strengths of $220$~MHz and mode quality factors in excess of $10^6$ are demonstrated. The spin ensemble exhibits memory effects as well as remnant magnetisation. A qualitative change of system magnetic field response between 190 and 445mK is interpreted as a phase transition. This work is the first observation of the long range order in an ensemble of dilute Rare-Earth impurities similar to the phenomenon of dilute ferromagnetism in semiconductors.

W. G. Farr; M. Goryachev; J. M. le Floch; P. Bushev; M. E. Tobar

2014-11-29T23:59:59.000Z

153

Tar Reforming in Model Gasifier Effluents: Transition Metal/Rare Earth Oxide Catalysts  

Science Journals Connector (OSTI)

Tar Reforming in Model Gasifier Effluents: Transition Metal/Rare Earth Oxide Catalysts ... So in this work we investigated the action of transition metal oxides (TMOs) other than Ni (e.g., Fe, Mn) mixed with REOs for tar reforming, at a medium temperature range (923–1073 K) and under conditions where direct reforming would dominate. ... The heated gas mixture passed through a 1/2” stainless steel tube containing 0.2–1 g of catalyst (40–60 mesh size) diluted with mullite and positioned between beds of ?-Al2O3. ...

Rui Li; Amitava Roy; Joseph Bridges; Kerry M. Dooley

2014-04-24T23:59:59.000Z

154

Synchrotron Diffraction Studies of Spontaneous Magnetostriction in Rare Earth Transition Metal Compounds  

SciTech Connect

Thermal expansion anomalies of R{sub 2}Fe{sub 14}B and R{sub 2}Fe{sub 17}C{sub x} (x = 0,2) (R = Y, Nd, Gd, Tb, Er) stoichiometric compounds are studied with high-energy synchrotron X-ray powder diffraction using Debye-Schemer geometry in temperature range 10K to 1000K. Large spontaneous magnetostriction up to their Curie temperatures (T{sub c}) is observed. The a-axes show relatively larger invar effects than c-axes in the R{sub 2}Fe{sub 14}B compounds whereas the R{sub 2}Fe{sub 17}C{sub x} show the contrary anisotropies. The iron sub-lattice is shown to dominate the spontaneous magnetostriction of the compounds. The contribution of the rare earth sublattice is roughly proportional to the spin magnetic moment of the rare earth in the R{sub 2}Fe{sub 14}B compounds but in R{sub 2}Fe{sub 17}C{sub x}, the rare earth sub-lattice contribution appears more likely to be dominated by the local bonding. The calculation of spontaneous magnetostrain of bonds shows that the bonds associated with Fe(j2) sites in R{sub 2}Fe{sub 14}B and the dumbbell sites in R{sub 2}Fe{sub 17}C{sub x} have larger values, which is strongly related to their largest magnetic moment and Wigner-Seitz atomic cell volume. The roles of the carbon atoms in increasing the Curie temperatures of the R{sub 2}Fe{sub 17} compounds are attributed to the increased separation of Fe hexagons. The R{sub 2}Fe{sub 17} and R{sub 2}Fe{sub 14}B phases with magnetic rare earth ions also show anisotropies of thermal expansion above T{sub c}. For R{sub 2}Fe{sub 17} and R{sub 2}Fe{sub 14}B the a{sub a}/a{sub c} > 1 whereas the anisotropy is reversed with the interstitial carbon in R{sub 2}Fe{sub 17}. The average bond magnetostrain is shown to be a possible predictor of the magnetic moment of Fe sites in the compounds. Both of the theoretical and phenomenological models on spontaneous magnetostriction are discussed and a Landau model on the spontaneous magnetostriction is proposed.

Ning Yang

2004-12-19T23:59:59.000Z

155

A Tof-SIMS analysis of the effect of lead nitrate on rare earth flotation  

Science Journals Connector (OSTI)

Abstract The influence of lead nitrate on rare earth flotation in the presence of hydroxamates as collectors has been investigated by a combination of micro-flotation tests and time of flight secondary ion mass spectrometry (ToF-SIMS) surface chemical analysis. Micro-flotation tests identified a link between lead nitrate dose and an improved grade of REE minerals for concentrates. The testing also identified differences in the flotation behaviour of light rare earth (LREEs, La or Ce bearing minerals) and Y and Zr bearing minerals. TOF-SIMS analyses evaluated the variability in surface components on undifferentiated REE grains from the concentrates and tails samples in response to the varied lead nitrate dosing in micro-flotation tests. The surface analyses showed that both the REE grains and gangue phases reporting to the concentrate have higher relative surface proportions of both Pb and collectors as compared to those reporting to the tails. It is noted that the lead does not appear to be associated with an increase in collector adsorption, so the grade of REE can go up is not by selective adsorption of collectors. The significantly higher intensity of Pb species identified on the surface of the concentrate would suggest that lead addition can actually reverse the surface charge making it efficient for collectors to adsorb onto surfaces that they could not easily close to. It is also possible PbOH+ potentially acting as a point activator.

Liuyin Xia; Brian Hart; Brandon Loshusan

2015-01-01T23:59:59.000Z

156

PII S0016-7037(02)01117-1 Diopside-bearing EL6 EET 90102: Insights from rare earth element distributions  

E-Print Network (OSTI)

PII S0016-7037(02)01117-1 Diopside-bearing EL6 EET 90102: Insights from rare earth element a study of the rare earth element (REE) distributions in EET 90102, with a specific emphasis on diopside or rare in other terrestrial or extra- terrestrial rocks. Typically, lithophile elements form sulfide

157

Effects of rare earth oxides and UO2 + x on the structure and the mechanical properties of Zircaloy  

Science Journals Connector (OSTI)

Tension test specimens of Zircaloy have been annealed with simulated fission products, as CeO2, La2O3, Nd2O3, Y2O3 or mixtures of these rare earth oxides and UO2 + x at 350°C up to 10 000 hours and at 500 or 700°C up to 2000 hours. The long term effects have been studied by tension tests, scanning electron microscopy, X-ray diffraction and metallography. Annealing of Zircaloy at 700°C with rare earth oxides generally leads to total embrittlement. There exists a gradation of efficacy which becomes obvious when the results of the annealing series at 500°C are compared. Rare earth oxides in mixtures with UO2 + x cause improportional intense reductions of ductility. The structural characteristics of specimens lead to thermodynamic considerations of the probable reaction mechanism.

Fritz Holub

1985-01-01T23:59:59.000Z

158

Superconductivity up to 114 K in the Bi-Al-Ca-Sr-Cu-O compound system without rare-earth elements  

Science Journals Connector (OSTI)

Stable superconductivity up to 114 K has been reproducibly detected in Bi-Al-Ca-Sr-Cu-O multiphase systems without any rare-earth elements. Pressure has only a slight positive effect on Tc. These observations provide an extra material base for the study of the mechanism of high-temperature superconductivity and also the prospect of reduced material cost for future applications of superconductivity.

C. W. Chu; J. Bechtold; L. Gao; P. H. Hor; Z. J. Huang; R. L. Meng; Y. Y. Sun; Y. Q. Wang; Y. Y. Xue

1988-03-07T23:59:59.000Z

159

The impact of trade costs on rare earth exports : a stochastic frontier estimation approach.  

SciTech Connect

The study develops a novel stochastic frontier modeling approach to the gravity equation for rare earth element (REE) trade between China and its trading partners between 2001 and 2009. The novelty lies in differentiating betweenbehind the border' trade costs by China and theimplicit beyond the border costs' of China's trading partners. Results indicate that the significance level of the independent variables change dramatically over the time period. While geographical distance matters for trade flows in both periods, the effect of income on trade flows is significantly attenuated, possibly capturing the negative effects of financial crises in the developed world. Second, the total export losses due tobehind the border' trade costs almost tripled over the time period. Finally, looking atimplicit beyond the border' trade costs, results show China gaining in some markets, although it is likely that some countries are substituting away from Chinese REE exports.

Sanyal, Prabuddha; Brady, Patrick Vane; Vugrin, Eric D.

2013-09-01T23:59:59.000Z

160

Separation of tervalent transplutonium and rare-earth elements using for-tveks  

SciTech Connect

The authors study the distribution of curium, americium, and certain rare-earth elements (REE) between aqueous nitric acid solutions and FOR-tveks under static and dynamic conditions. It is shown that on introducing diethylenetriaminepentaacetic acid into the aqueous solution separation coefficients for the transplutonium elements and REE can be obtained which are sufficiently high for practical use. A method is proposed for the group separation of REE and transplutonium elements under dynamic conditions. On a column 22 cm high coefficients of approximately 500 are obtained for the purification of curium from cerium, more than 260 from neodymium, 250 from lanthanum, and 14 from europium and gadolinium. The possibility has been studied of separating palladium from transplutonium elements and REE and isolating it as an individual product.

Zaitsev, B.N.; Korolev, V.A.; Korovin, Y.F.; Kuzovov, Y.I.; Kvasnitskii, I.B.; Popik, V.P.

1986-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Magnetization switching of rare earth orthochromite CeCrO{sub 3}  

SciTech Connect

We report the synthesis of single phase rare earth orthochromite CeCrO{sub 3} and its magnetic properties. A canted antiferromagnetic transition with thermal hysteresis at T?=?260?K is observed, and a magnetic compensation (zero magnetization) near 133?K is attributed to the antiparallel coupling between Ce{sup 3+} and Cr{sup 3+} moments. At low temperature, field induced magnetization reversal starting from 43?K for H?=?1.2 kOe reveals the spin flip driven by Zeeman energy between the net moments and the applied field. These findings may find potential uses in magnetic switching devices such as nonvolatile magnetic memory which facilitates two distinct states of magnetization.

Cao, Yiming; Cao, Shixun, E-mail: sxcao@shu.edu.cn; Ren, Wei; Feng, Zhenjie; Yuan, Shujuan; Kang, Baojuan; Zhang, Jincang [Department of Physics, Shanghai University, Shanghai 200444 (China); Lu, Bo [Laboratory for Microstructures, Shanghai University, Shanghai 200444 (China)

2014-06-09T23:59:59.000Z

162

Ion implantation of rare-earth dopants in ferromagnetic thin films  

SciTech Connect

We show that high-dose ion implantation can be used to introduce rare-earth dopants for the control of precessional dynamics in magnetic thin films. Tb and Gd ions have been implanted in Ni{sub 81}Fe{sub 19} through Ta masks at dosages from 1x10{sup 14}/cm{sup 2} to 1x10{sup 15}/cm{sup 2}. Effects on dynamics are found to be similar to those contributed by cosputtered Tb and Gd dopants in Ni{sub 81}Fe{sub 19} (50 nm). Broadband ferromagnetic resonance measurements from 0 to 18 GHz show that adjustments in damping {alpha} from 0.008 to 0.040 are fully intrinsic (Gilbert type) and roughly proportional to dose. The technique enables the creation of films with spatially modulated precessional characteristics.

Dasgupta, V.; Litombe, N.; Bailey, W. E.; Bakhru, H. [Materials Science Program, Department of Applied Physics, Columbia University, 500 West 120th Street, New York, New York 10027 (United States); College of Nanoscale Science and Engineering, SUNY Albany, 251 Fuller Road, Albany, New York 12203 (United States)

2006-04-15T23:59:59.000Z

163

Photoeffect cross sections of several rare-earth elements for 323-keV photons  

Science Journals Connector (OSTI)

Total-attenuation cross sections of the oxides of rare-earth elements such as La, Ce, Pr, Nd, Sm, Gd, Dy, Ho, and Er, and also NaNO3 and NaNO2 have been measured in a narrow-beam geometry setup at 323 keV. The total-attenuation cross section for oxygen was obtained as the difference in NaNO3 and NaNO2 cross sections. Using this, the total-attenuation cross sections of the individual lanthanides have been obtained with the aid of the mixture rule. From these, the photoeffect cross sections were derived by subtracting the scattering contribution. These values are found to agree well with Scofield’s theoretical data [University of California Report No. UCRL 51326, 1973 (unpublished)].

T. K. Umesh, S. J. Anasuya, J. Shylaja Kumari, Channe Gowda, K. P. Gopinathan Nair, and Ramakrishna Gowda

1992-02-01T23:59:59.000Z

164

New Rare Earth Element Abundance Distributions for the Sun and Five r-Process-Rich Very Metal-Poor Stars  

E-Print Network (OSTI)

We have derived new abundances of the rare-earth elements Pr, Dy, Tm, Yb, and Lu for the solar photosphere and for five very metal-poor, neutron-capture r-process-rich giant stars. The photospheric values for all five elements are in good agreement with meteoritic abundances. For the low metallicity sample, these abundances have been combined with new Ce abundances from a companion paper, and reconsideration of a few other elements in individual stars, to produce internally-consistent Ba, rare-earth, and Hf (56element distributions. These have been used in a critical comparison between stellar and solar r-process abundance mixes.

Sneden, Christopher; Cowan, John J; Ivans, Inese I; Hartog, Elizabeth A Den

2009-01-01T23:59:59.000Z

165

Earth Mover's Distance Based Local Discriminant Basis  

E-Print Network (OSTI)

Earth Mover's Distance Based Local Discriminant Basis Bradley Marchand and Naoki Saito Abstract in time and frequency. Its goal, given Bradley Marchand Naval Surface Warfare Center, Panama City Division, e-mail: bradley.marchand@navy.mil Naoki Saito Department of Mathematics, University of California

Saito, Naoki

166

Subcell Structure and Two Different Superstructures of the Rare Earth Metal Silicide Carbides Y  

SciTech Connect

The title compounds crystallize with a very pronounced subcell structure that has been determined from single-crystal X-ray diffractometer data of all four compounds. Only subcell (and no superstructure) reflections have been observed for Pr{sub 3}Si{sub 2}C{sub 2}: space group Cmmm, a=396.7(1) pm, b=1645.2(3) pm, c=439.9(1) pm, R=0.019 for 309 structure factors and 20 variable parameters. In this subcell structure there are C{sub 2} pairs with split atomic positions. This structure may be considered the thermodynamically stable forms of these compounds at high temperatures. Two different superstructures with doubled a or c axes, respectively, of the subcell have been observed, where the C{sub 2} pairs have different orientations. In the structure of Tb{sub 3}Si{sub 2}C{sub 2} the a axis of the subcell is doubled. The resulting superstructure in the standard setting has the space group Pbcm: a=423.6(1) pm, b=770.7(1) pm, c=1570.2(3) pm, R=0.031 f or 1437 structure factors and 22 variable parameters. Dy{sub 3}Si{sub 2}C{sub 2} has the same superstructure: a=420.3(1) pm, b=767.5(1) pm, c=1561.1(3) pm, R=0.045, 801 F values, 22 variables. In the structure of Y{sub 3}Si{sub 2}C{sub 2} the c axis of the subcell is doubled, resulting in a body-centered space group with the standard setting Imma: a=842.6(2) pm, b=1563.4(2) pm, c=384.6(1) pm, R=0.035, 681 F values, 15 variables. In all of these structures the rare earth atoms form two-dimensionally infinite sheets of edge-sharing octahedra that contain the C{sub 2} pairs. In between these sheets there are zig-zag chains of silicon atoms with Si-Si distances varying between 246.2(3) and 253.6(3) pm, somewhat longer than the two-electron bonds of 235 pm in elemental silicon, suggesting a bond order of 0.5 for the Si-Si bonds. The C-C distances in the C{sub 2} pairs vary between 127(1) and 131(1) pm, corresponding to a bond order of approximately 2. 5. Hence, using oxidation numbers, the compounds may to a first approximation be represented by the formula (R{sup +3}){sub 3}(Si{sup {minus}3}){sub 2}(C{sub 2}){sup {minus}3}. A more detailed analysis of the interatomic distances showed that the shortest R-R distances are comparable with the R-R distances in the structures of the rare earth elements, thus indicating some R-R bonding. Therefore, the oxidation numbers of the rare earth atoms are slightly lower than +3, in agreement with the metallic conductivity of these compounds. As a consequence, considering the relatively short Si-Si bonds, the absolute value of the oxidation number of the silicon atoms may be lower than 3, resulting in a Si-Si bond order somewhat higher than 0.5.

Jeitschko, Wolfgang; Gerdes, Martin H.; Witte, Anne M.; Rodewald, Ute Ch.

2001-01-01T23:59:59.000Z

167

Processing and Protection of Rare Earth Permanent Magnet Particulate for Bonded Magnet Applications  

SciTech Connect

Rapid solidification of novel mixed rare earth-iron-boron, MRE{sub 2}Fe{sub 14}B (MRE = Nd, Y, Dy; currently), magnet alloys via high pressure gas atomization (HPGA) have produced similar properties and structures as closely related alloys produced by melt spinning (MS) at low wheel speeds. Recent additions of titanium carbide and zirconium to the permanent magnet (PM) alloy design in HPGA powder (using He atomization gas) have made it possible to achieve highly refined microstructures with magnetic properties approaching melt spun particulate at cooling rates of 10{sup 5}-10{sup 6}K/s. By producing HPGA powders with the desirable qualities of melt spun ribbon, the need for crushing ribbon was eliminated in bonded magnet fabrication. The spherical geometry of HPGA powders is more ideal for processing of bonded permanent magnets since higher loading fractions can be obtained during compression and injection molding. This increased volume loading of spherical PM powder can be predicted to yield a higher maximum energy product (BH){sub max} for bonded magnets in high performance applications. Passivation of RE-containing powder is warranted for the large-scale manufacturing of bonded magnets in applications with increased temperature and exposure to humidity. Irreversible magnetic losses due to oxidation and corrosion of particulates is a known drawback of RE-Fe-B based alloys during further processing, e.g. injection molding, as well as during use as a bonded magnet. To counteract these effects, a modified gas atomization chamber allowed for a novel approach to in situ passivation of solidified particle surfaces through injection of a reactive gas, nitrogen trifluoride (NF{sub 3}). The ability to control surface chemistry during atomization processing of fine spherical RE-Fe-B powders produced advantages over current processing methodologies. In particular, the capability to coat particles while 'in flight' may eliminate the need for post atomization treatment, otherwise a necessary step for oxidation and corrosion resistance. Stability of these thin films was attributed to the reduction of each RE's respective oxide during processing; recognizing that fluoride compounds exhibit a slightly higher (negative) free energy driving force for formation. Formation of RE-type fluorides on the surface was evidenced through x-ray photoelectron spectroscopy (XPS). Concurrent research with auger electron spectroscopy has been attempted to accurately quantify the depth of fluoride formation in order to grasp the extent of fluorination reactions with spherical and flake particulate. Gas fusion analysis on coated powders (dia. <45 {micro}m) from an optimized experiment indicated an as-atomized oxygen concentration of 343ppm, where typical, nonpassivated RE atomized alloys exhibit an average of 1800ppm oxygen. Thermogravimetric analysis (TGA) on the same powder revealed a decreased rate of oxidation at elevated temperatures up to 300 C, compared to similar uncoated powder.

Peter Kelly Sokolowski

2007-12-01T23:59:59.000Z

168

Exchange interaction in binuclear complexes with rare-earth and copper ions: A many-body model study  

Science Journals Connector (OSTI)

We have used a many-body model Hamiltonian to study the nature of the magnetic ground state of heterobinuclear complexes involving rare-earth and copper ions. We have taken into account all diagonal repulsions involving the rare-earth 4f and 5d orbitals and the copper 3d orbital. In addition, we have included direct exchange interaction, crystal field splitting of the rare-earth atomic levels and spin-orbit interaction in the 4f orbitals. We have identified the interorbital 4f repulsion Uff and crystal field parameter ?f as the key parameters involved in controlling the type of exchange interaction between the rare earth 4f and copper 3d spins. We have explored the nature of the ground state in the parameter space of Uff, ?f, spin-orbit interaction strength ?, and the 4f filling nf. We find that these systems show low-spin or high-spin ground state depending on the filling of the 4f levels of the rare-earth ion and ground state spin is critically dependent on Uff and ?f. In case of half filling [Gd(III)] we find a reentrant low-spin state as Uff is increased, for small values of ?f, which explains the recently reported apparent anomalous antiferromagnetic behavior of Gd(III)-radical complexes. By varying Uff we also observe a switch over in the ground state spin for other fillings. We have introduced a spin-orbit coupling scheme which goes beyond the L-S or j-j coupling scheme and we find that spin-orbit coupling does not significantly alter the basic picture.

Indranil Rudra; C. Raghu; S. Ramasesha

2002-05-28T23:59:59.000Z

169

Dynamical properties of a crystalline rare-earth boron cluster spin-glass system  

Science Journals Connector (OSTI)

Dynamical properties of the magnetic B12 cluster compound HoB22C2N were investigated. HoB22C2N is taken to be representative of the class of trigonal and rhombohedral B12 cluster compounds which were found to exhibit spin-glass behavior as measured by dc superconducting quantum interference device magnetometer and specific-heat measurements. These are examples of magnetic glassiness being observed in rare earth boron-rich crystalline cluster compounds. Well defined maxima in the in-phase linear ac susceptibility ?? curves were observed, indicative of the spin-glass transition. Strong frequency dependence of the cusp temperature Tf was found. The dependence of Tf could not be analyzed satisfactorily by the dynamical scaling theory of a three-dimensional spin glass. A more detailed investigation of the behavior of relaxation times by Cole-Cole analysis showed that the behavior in HoB22C2N is different from the simple blocking of a superparamagnetic system, because of the temperature dependence of the parameter ? representing the width of the relaxation-time distribution function g(?). The median relaxation time was also determined and the data were found to be described well in terms of a generalized Arrhenius law ln ??T-2.5. These results indicate that HoB22C2N is a two-dimensional spin-glass system, which supports what has been speculated previously.

Takao Mori and Hiroaki Mamiya

2003-12-18T23:59:59.000Z

170

Magnetic properties of exchange-coupled trilayers of amorphous rare-earth-cobalt alloys  

Science Journals Connector (OSTI)

From amorphous thin films from alloys of rare earths (Gd, Sm), yttrium or zirconium with cobalt we have prepared trilayers with very clean interfaces appropriate for the study of magnetic coupling. The sandwiches were typically Y-Co/Gd-Co/Y-Co and Sm-Co/X/Sm-Co|IH (X=Gd-Co, Co-Zr, Co). The three individual layers are coupled magnetically by exchange interactions between cobalt moments throughout the entire sample. This coupling associated with the specific properties of the given alloy (magnetic moment, anisotropy, coercivity) leads to ferrimagnetic or ferromagnetic structures of the magnetization of adjacent layers and to novel magnetization processes. For systems consisting of magnetically hard external layers with different coercivities and a soft central layer (Sm-Co/X/Sm-Co|IH, X=Gd-Co, Co-Zr), the influence of the central layer's thickness and type of the material on coupling and magnetization processes have been studied quantitatively. Numerical simulations using a one-dimensional model for describing the magnetization processes observed in sandwich systems fit the magnetization curves of these model systems particularly well.

S. Wüchner; J. C. Toussaint; J. Voiron

1997-05-01T23:59:59.000Z

171

Coherent storage of microwave excitations in rare-earth nuclear spins  

E-Print Network (OSTI)

Interfacing between various elements of a computer - from memory to processors to long range communication - will be as critical for quantum computers as it is for classical computers today. Paramagnetic rare earth doped crystals, such as Nd$^{3+}$:Y$_2$SiO$_5$ (YSO), are excellent candidates for such a quantum interface: they are known to exhibit long optical coherence lifetimes (for communication via optical photons), possess a nuclear spin (memory) and have in addition an electron spin that can offer hybrid coupling with superconducting qubits (processing). Here we study two of these three elements, demonstrating coherent storage and retrieval between electron and $^{145}$Nd nuclear spin states in Nd$^{3+}$:YSO. We find nuclear spin coherence times can reach 9 ms at $\\approx 5$ K, about two orders of magnitude longer than the electron spin coherence, while quantum state and process tomography of the storage/retrieval operation reveal an average state fidelity of 0.86. The times and fidelities are expected to further improve at lower temperatures and with more homogeneous radio-frequency excitation.

Gary Wolfowicz; Hannes Maier-Flaig; Robert Marino; Alban Ferrier; Hervé Vezin; John J. L. Morton; Philippe Goldner

2014-12-23T23:59:59.000Z

172

Oxidation resistance of 9-12% Cr steels: effect of rare earth surface treatment  

SciTech Connect

Medium Cr steels have been used in fossil fired power plants for many years because of their excellent high temperature stability and mechanical properties. The environment in a fossil fired power plant is extremely aggressive in terms of corrosion, especially oxidation. This is only accelerated as the operating temperature increases to 650C and beyond. For any new steel to be qualified for power plant use, in addition to adequate strength at the operating temperature, material wastage from all corrosion processes must be kept to a minimum acceptable level. The use of medium Cr steels provides a means to improve overall corrosion resistance. Three medium Cr are under development for use as high temperature power plant steels: 0.08C-(9-12)Cr-1.2Ni-0.7Mo-3.0Cu-3.0Co-0.5Ti. Oxidation tests were performed on the steels for times greater than 1000 hours in order to determine the oxidation kinetics and extent of material wastage. Also, rare earth oxides were incorporated into the outer surface layers of the steels to see if the oxidation resistance could be improved. These results will be compared to current power plant steels.

Dogan, Omer N.; Alman, David A.; Jablonski, Paul D.

2005-02-01T23:59:59.000Z

173

Soft-Sphere Model for Nuclear Quadrupole Resonance: Rare-Earth Trichlorides under Hydrostatic Pressure  

Science Journals Connector (OSTI)

Nuclear quadrupole resonance of Cl35 in five hexagonal rare-earth trichlorides under hydro-static pressure up to 5×103 kg/cm2 showed a decrease in frequency ? with increase in pressure. The normalized pressure coefficients ?0-1 (???P)T varied smoothly between the extremes (-5.586 ± 0.020) × (10-6 cm2/kg) and (-3.855 ± 0.016) × (10-6 cm2/kg) for CeCl3 and GdCl3, respectively. The negative sign suggested a model with a significant overlap contribution to the electric field gradient and a soft-sphere model was developed in analogy to the Born-Mayer model of inter-ionic repulsive forces. This model proved adequate to explain the systematic variations in ?Q with compound and was consistent with the pressure dependence of ?. The use of pressure data as a critical test for the model must await reliable compressibility data for the compounds. Pressure data for monoclinic ErCl3 and YbCl3 are also presented.

David H. Current; C. L. Foiles; Edward H. Carlson

1972-08-01T23:59:59.000Z

174

Ternary rare earth and actinoid transition metal carbides viewed as carbometalates  

SciTech Connect

Ternary carbides A{sub x}T{sub y}C{sub z} (A=rare earth metals and actinoids; T=transition metals) with monoatomic species C{sup 4-} as structural entities are classified according to the criteria (i) metal to carbon ratio, (ii) coordination number of the transition metal by carbon atoms, and (iii) the dimensionality of the anionic network [T{sub y}C{sub z}]{sup n-}. Two groups are clearly distinguishable, depending on the metal to carbon ratio. Those where this ratio is equal to or smaller than 2 may be viewed as carbometalates, thus extending the sequence of complex anions from fluoro-, oxo-, and nitridometalates to carbometalates. The second group, metal-rich carbides with metal to carbon ratios equal to or larger than 4 is better viewed as typical intermetallics (''interstitial carbides''). The chemical bonding properties have been investigated by analyzing the Crystal Orbital Hamilton Population (COHP). The chemical bonding situation with respect to individual T-C bonds is similar in both classes. The main difference is the larger number of metal-metal bonds in the crystal structures of the metal-rich carbides.

Dashjav, Enkhtsetseg [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, D-01187 Dresden (Germany); Kreiner, Guido [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, D-01187 Dresden (Germany); Schnelle, Walter [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, D-01187 Dresden (Germany); Wagner, Frank R. [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, D-01187 Dresden (Germany); Kniep, Ruediger [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, D-01187 Dresden (Germany)], E-mail: Kniep@cpfs.mpg.de; Jeitschko, Wolfgang [Institut fuer Anorganische und Analytische Chemie, Universitaet Muenster, Wilhelm-Klemm-Strasse 8, D-48149 Muenster (Germany)], E-mail: jeitsch@uni-muenster.de

2007-02-15T23:59:59.000Z

175

4f-derived photoemission and 4f-ligand hybridization in light rare-earth halides  

Science Journals Connector (OSTI)

We have studied the 4f-derived photoemission spectra of insulating Ce, Pr, and Nd trihalides by resonant photoemission spectroscopy. A double-peak structure is observed in every f spectrum as in metallic Ce, Pr, and Nd compounds and is successfully analyzed in terms of the cluster model. This confirms that the two peaks arise from hybridization between the 4f and ligand p orbitals rather than from two different screening channels of the f hole. The f-ligand hybridization strength is found to decrease on going from the Ce to Pr to Nd compounds, but appears to remain significantly large for heavier rare earths, suggesting the importance of hybridization effects in heavy rare-earth compounds.

A. Fujimori; T. Miyahara; T. Koide; T. Shidara; H. Kato; H. Fukutani; S. Sato

1988-10-15T23:59:59.000Z

176

Low-Temperature Relaxation Effects in Pulsed-Field Electron-Paramagnetic-Resonance Spectra of Rare-Earth Ions  

Science Journals Connector (OSTI)

Spin-lattice relaxation effects have been observed in the pulsed-field EPR spectra of rare earths in yttrium aluminum garnet, yttrium gallium garnet, and CaF2. An analysis has been developed that permits evaluation of the spin-lattice relaxation rates. It is shown that for a number of Kramers-doublet rare-earth ions, at frequencies above 70 Gc/sec and at liquid-helium temperatures, the only important relaxation mechanism is the direct spin-phonon interaction due to modulation of the crystalline field by lattice vibrations. The effects of paramagnetic impurity concentration and low-lying excited states on relaxation rates have also been observed, and, where appropriate, their influence is included in the analysis and discussion.

L. Rimai; R. W. Bierig; B. D. Silverman

1966-06-03T23:59:59.000Z

177

Lattice stability of aluminum-rare earth binary systems: A first-principles approach  

Science Journals Connector (OSTI)

The thermodynamics of over 330 compounds in 15 Al-RE (RE=rare earth elements) binary systems is studied via first-principles density-functional theory at low-temperature limit. The calculated phase stabilities at T=0K are in very good agreement with experimentally reported ones for the majority of the systems. For example, we show the Al2RE.cF24 structure is the most stable compound phase in each binary and it indeed has the highest (congruent) melting point in each system. In some other cases, we obtain results previously unknown experimentally. For example, we suggest that the structure of the observed compound AlTm2 is isostructural with Co2Si.oP12 (prototype Co2Si, Pearson symbol oP12), we confirm the stability of AlEu.oP20 rather than AlEu.oP18 by examining the energetics of vacancy substitution, and we predict the unreported Al-Pm phase diagram. Relative accuracy of different potentials and calculational details are addressed. This study predicts that the Al-RE phase diagrams evolve systematically across the entire RE series, interrupted by anomalies at elements Ce and especially Eu and Yb. Trends in lattice stability across the RE series are explained on the basis of interatomic bonding and strain. This study demonstrates that first-principles calculations can be employed to (1) further examine and improve the experimentally established binary-alloy phase diagrams, and (2) provide accurate enthalpy data for stable and hypothetical compounds and structures.

Michael C. Gao; Anthony D. Rollett; Michael Widom

2007-05-31T23:59:59.000Z

178

Nuclear-decay studies of neutron-rich rare-earth nuclides  

SciTech Connect

Neutron-rich rare-earth nuclei were produced in multinucleon transfer reactions of {sup 170}Er and {sup 176}Yb projectiles on {sup nat}W targets at the Lawrence Berkeley Laboratory SuperHILAC and their radioactive decays properties studied at the on-line mass separation facility OASIS. Two unknown isotopes, {sup 169}Dy (t {sub 1/2} {equals} 39 {plus minus} 8 s) and {sup 174}Er(t{sub 1/2} {equals} 3.3 {plus minus} 0.2 m) were discovered and their decay characteristics determined. The decay schemes for two previously identified isotopes, {sup 168}Dy (t{sub 1/2} {equals} 8.8 {plus minus} 0.3 m) and {sup 171}Ho (t{sub 1/2} {equals} 55 {plus minus} 3 s), were characterized. Evidence for a new isomer of 3.0 m {sup 168}Ho{sup g}, {sup 168}Ho{sup m} (t{sub 1/2} {equals} 132 {plus minus} 4 s) which decays by isomeric transition (IT) is presented. Beta particle endpoint energies were determined for the decay of {sup 168}Ho{sup g}, {sup 169}Dy, {sup 171}Ho, and {sup 174}Er, the resulting Q{beta}-values are: 2.93 {plus minus} 0.03, 3.2 {plus minus} 0.3, 3.2 {plus minus} 0.6, and 1.8 {plus minus} 0.2 MeV, respectively. These values were compared with values calculated using recent atomic mass formulae. Comparisons of various target/ion source geometries used in the OASIS mass separator facility for these multinucleon transfer reactions were performed. 73 refs., 40 figs., 11 tabs.

Chasteler, R.M. (California Univ., Berkeley, CA (USA). Dept. of Chemistry Lawrence Berkeley Lab., CA (USA))

1990-04-26T23:59:59.000Z

179

Derivation of an optical potential for statically deformed rare-earth nuclei from a global spherical potential  

E-Print Network (OSTI)

The coupled-channel theory is a natural way of treating nonelastic channels, in particular those arising from collective excitations characterized by nuclear deformations. A proper treatment of such excitations is often essential to the accurate description of experimental nuclear-reaction data and to the prediction of a wide variety of scattering observables. Stimulated by recent work substantiating the near validity of the adiabatic approximation in coupled-channel calculations for scattering on statically deformed nuclei, we explore the possibility of generalizing a global spherical optical model potential (OMP) to make it usable in coupled-channel calculations on this class of nuclei. To do this, we have deformed the Koning-Delaroche global spherical potential for neutrons, coupling a sufficient number of states of the ground state band to ensure convergence. We present an extensive study of the effects of collective couplings and nuclear deformations on integrated cross sections as well as on angular distributions for neutron-induced reactions on statically deformed nuclei in the rare-earth region. We choose isotopes of three rare-earth elements (Gd, Ho, W), which are known to be nearly perfect rotors, to exemplify the results of the proposed method. Predictions from our model for total, elastic and inelastic cross sections, as well as for elastic and inelastic angular distributions, are in reasonable agreement with measured experimental data. These results suggest that the deformed Koning-Delaroche potential provides a useful regional neutron optical potential for the statically deformed rare earth nuclei.

G. P. A. Nobre; A. Palumbo; F. S. Dietrich; M. Herman; D. Brown; S. Hoblit

2014-12-22T23:59:59.000Z

180

Recovery of Trace Rare Earths from High-Level Fe3+ and Al3+ Waste of Oil Shale Ash (Fe?Al?OSA)  

Science Journals Connector (OSTI)

State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P.R. China, and Graduate School of the Chinese Academy of Sciences, Beijing 100039, P.R. ... Rare earth elements are finding increasing use in various industries as catalysts for petroleum cracking, metallurgy, glass and ceramics, electronics, chemicals, magnets, and nuclear industries, and in the manufacture of various types of phosphors, lamps, mantles, and many others. ... (14) Considering this situation, all governments have strengthened the regulation of import and export of rare earth products and especially emphasized safety and environmental issues of chemical engineering in recent years. ...

Hualing Yang; Wei Wang; Dongli Zhang; Yuefeng Deng; Hongming Cui; Ji Chen; Deqian Li

2010-10-08T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2007. All  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was not mined in the United States in 2007. All yttrium Number Normal Trade Relations 12-31-07 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth-bearing materials and compounds containing by weight >19% to rare-earth

182

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2009. All  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was not mined in the United States in 2009. All yttrium. Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed 2805.30.0000 5.0% ad. Other rare-earth compounds, including yttrium oxide >85% Y2O3, yttrium nitrate, and other individual

183

[Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted] Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2010. All  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was not mined in the United States in 2010. All yttrium. Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed 2805.30.0000 5.0% ad. Other rare-earth compounds, including yttrium oxide >85% Y2O3, yttrium nitrate, and other individual

184

(Data in metric tons of yttrium oxide (Y2O3) content, unless noted) Domestic Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the  

E-Print Network (OSTI)

Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth ores and concentrates (monazite) 2612.20.0000 Free Free. Rare-earth metals, scandium and yttrium

185

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2008. All  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was not mined in the United States in 2008. All yttrium 12-31-08 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium and compounds containing by weight >19% to rare-earth compounds, including

186

(Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnsite  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnäsite at Mountain Pass, CA, but was not recovered as a separate element during processing. Bastnäsite, a rare-earth Number Normal Trade Relations 12/31/02 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth

187

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2006. All  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was not mined in the United States in 2006. All yttrium-31-06 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium and yttrium and compounds containing by weight >19% to rare-earth compounds, including

188

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2010. All  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was not mined in the United States in 2010. All yttrium Normal Trade Relations 12-31-10 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth-bearing materials and compounds containing by weight >19% to rare-earth compounds

189

(Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2003.  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was not mined in the United States in 2003. Yttrium Relations 12/31/03 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium and compounds containing by weight >19% to rare-earth compounds, including

190

(Data in metric tons of yttrium oxide (Y O ) content, unless otherwise noted)2 3 Domestic Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the  

E-Print Network (OSTI)

Domestic Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth.20.0000 Free Free. Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed 2805

191

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2004. Yttrium  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was not mined in the United States in 2004. Yttrium Relations 12-31-04 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium and compounds containing by weight >19% to rare-earth compounds, including

192

(Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnasite,  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth fluocarbonate mineral, was mined and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium and yttrium, whether or not intermixed

193

(Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element, yttrium, was mined as a constituent of the mineral  

E-Print Network (OSTI)

Production and Use: The rare-earth element, yttrium, was mined as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth fluocarbonate mineral, was mined.20.0000 Free. Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed 2805.30.0000 5

194

(Data in metric tons of yttrium oxide (Y O ) content, unless otherwise noted)2 3 Domestic Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the  

E-Print Network (OSTI)

Domestic Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth/31/96 Thorium ores and concentrates (monazite) 2612.20.0000 Free Free. Rare-earth metals, scandium and yttrium

195

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2005. All  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was not mined in the United States in 2005. All yttrium-31-05 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium and yttrium and compounds containing by weight >19% to rare-earth compounds, including

196

(Data in metric tons of yttrium oxide (Y O ) content, unless otherwise noted)2 3 Domestic Production and Use: The rare-earth element, yttrium, was mined as a constituent of the mineral bastnasite,  

E-Print Network (OSTI)

Domestic Production and Use: The rare-earth element, yttrium, was mined as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth/31/98 Thorium ores and concentrates (monazite) 2612.20.0000 Free Free. Rare-earth metals, scandium and yttrium

197

Formation of partial energy gap below the structural phase transition and the rare-earth element-substitution effect on infrared phonons in ReFeAsO (Re=La, Nd, and Sm)  

E-Print Network (OSTI)

Formation of partial energy gap below the structural phase transition and the rare-earth element phonon modes display systematic shifts toward high frequency upon rare-earth element Nd and Sm temperature Tc was raised beyond 50 K through the substitution of La by rare-earth elements. Tc is found

Wang, Wei Hua

198

(Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnasite  

E-Print Network (OSTI)

Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnasite at Mountain Pass, CA, but was not recovered as a separate element during processing. Bastnasite, a rare-earth Number Normal Trade Relations 12/31/01 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth

199

Yttrium and rare earth elements in fluids from various deep-sea hydrothermal systems  

SciTech Connect

Rare earth element (REE) and yttrium (Y) concentrations were measured in fluids collected from deep-sea hydrothermal systems including the Mid-Atlantic Ridge (MAR), i.e., Menez Gwen, Lucky Strike, TAG, and Snakepit; the East Pacific Rise (EPR), i.e., 13{degree}N and 17--19{degree}S; and the Lau (Vai Lili) and Manus (Vienna Woods, PacManus, Desmos) Back-arc Basins (BAB) in the South-West Pacific. In most fluids, Y is trivalent and behaves like Ho. Chondrite normalized Y-REE (Y-REE{sub N}) concentrations of fluids from MAR, EPR, and two BAB sites, i.e., Vai Lili and Vienna Woods, showed common patterns with LREE enrichment and positive Eu anomalies. REE analysis of plagioclase collected at Lucky Strike strengthens the idea that fluid REE contents, are controlled by plagioclase phenocrysts. Other processes, however, such as REE complexation by ligands (Cl{sup {minus}}, F{sup {minus}}, So{sub 4}{sup 2{minus}}), secondary phase precipitation, and phase separation modify REE distributions in deep-sea hydrothermal fluids. REE speciation calculations suggest that aqueous REE are mainly complexed by Cl{sup {minus}} ions in hot acidic fluids from deep-sea hydrothermal systems. REE concentrations in the fluid phases are, therefore, influenced by temperature, pH, and duration of rock-fluid interaction. Unusual Y-REE{sub N} patterns found in the PacManus fluids are characterized by depleted LREE and a positive Eu anomaly. The Demos fluid sample shows a flat Y-REE{sub N} pattern, which increases regularly from LREE to HREE with no Eu anomaly. These Manus Basin fluids also have an unusual major element chemistry with relatively high Mg, So{sub 4}, H{sub 2}S, and F contents, which may be due to the incorporation of magmatic fluids into heated seawater during hydrothermal circulation. REE distribution in PacManus fluids may stem from a subseafloor barite precipitation and the REE in Demos fluids are likely influenced by the presence of sulfate ions.

Douville, E. [Univ. Bretagne Occidentale, Brest (France). Dept. de Chimie] [Univ. Bretagne Occidentale, Brest (France). Dept. de Chimie; [IFREMER Centre de Brest, Plouzane (France); Appriou, P. [Univ. Bretagne Occidentale, Brest (France)] [Univ. Bretagne Occidentale, Brest (France); Bienvenu, P. [CEA Cadarache, Saint Paul Lez Durance (France). Lab. d`Analyses Radiochimiques et Chimiques] [CEA Cadarache, Saint Paul Lez Durance (France). Lab. d`Analyses Radiochimiques et Chimiques; Charlou, J.L.; Donval, J.P.; Fouquet, Y. [IFREMER Centre de Brest, Plouzane (France)] [IFREMER Centre de Brest, Plouzane (France); Gamo, Toshitaka [Univ. of Tokyo, Nakano, Tokyo (Japan). Ocean Research Inst.] [Univ. of Tokyo, Nakano, Tokyo (Japan). Ocean Research Inst.

1999-03-01T23:59:59.000Z

200

Reduction Chemistry of Rare-Earth Metal Complexes: Toward New Reactivity and Properties  

E-Print Network (OSTI)

reactor and was named promethium. Even Nature could onlyrare-earths (except for promethium and europium; ytterbiumeuropium and radioactive promethium) on hand, we synthesized

Huang, Wenliang

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Density of states of a semi-infinite rare-earth metal with magnetic structure: A simple model  

Science Journals Connector (OSTI)

Using a simple tight-binding model and the transfer matrix approach, we have calculated the spectral density of states (SDOS) of a rare-earth metal in the presence of a surface for different magnetic arrangements (such as ferromagnetic, antiferromagnetic, and conical orderings). The local density of states (LDOS) has also been calculated for some examples, integrating the SDOS over the Brillouin zone. The main effect observed deals with the absence of Van Hove's singularities in the surface LDOS, a fact that appears to be an intrinsic property of the surface. Finally the relaxation of the overlap parameters at the surface is discussed and some numerical examples are shown.

Bernardo Laks and G. G. Cabrera

1979-09-15T23:59:59.000Z

202

18F-Labeled Magnetic-Upconversion Nanophosphors via Rare-Earth Cation-Assisted Ligand Assembly  

Science Journals Connector (OSTI)

18F-Labeled Magnetic-Upconversion Nanophosphors via Rare-Earth Cation-Assisted Ligand Assembly ... The inset of Figure S7 shows the bright-field photo of AA-Gd-UCNPs dispersed in PBS for 0 and 48 h. ... To determine whether UCNPs coated with folic acid and aminocaproic acid (FA-AA-Gd-UCNPs, FA:AA = 1:9) could be used for cellular targeted imaging, we performed in vitro cellular studies using FR-positive [FR(+)] KB cell lines and FR-negative [FR(?)] MCF-7 cell lines. ...

Qian Liu; Yun Sun; Chenguang Li; Jing Zhou; Chunyan Li; Tianshe Yang; Xianzhong Zhang; Tao Yi; Dongmei Wu; Fuyou Li

2011-03-08T23:59:59.000Z

203

Inelastic exchange scattering in electron-energy-loss spectroscopy: Localized excitations in transition-metal and rare-earth systems  

Science Journals Connector (OSTI)

Cross sections for quasiatomic excitation by exchange scattering of electrons are calculated in the Born-Ochkur approximation for 3p-3d and 3d-3d transitions in transition-metal systems, and for 4d-4f and 4f-4f transitions in rare earths. The energy dependence of the spin polarization of 3p-3d and 4d-4f losses in reflection electron-energy-loss spectroscopy from ferromagnetic surfaces involves a balance of small-angle spin-dependent inelastic processes accompanied by a high-angle elastic scattering, and large-angle spin-flip exchange scattering without the need for elastic scattering. Both 3d-3d excitations, e.g., in transition-metal compounds, and 4f-4f excitations in rare earths involve spin-flip transitions whose scattering amplitudes g fall off with momentum transfer q such that the full width at half maximum q1/2 (in a.u.) is given by q1/2?rnl??2, where ?rnl? is the expectation value of r for the 3d or 4f electron. The angular width of the spin-flip differential cross section is then much greater than for dipole transitions, a pattern that helps to account for how these intra-atomic transitions compete with dipole processes for primary energies in excess of 100 eV.

S. J. Porter; J. A. D. Matthew; R. J. Leggott

1994-07-15T23:59:59.000Z

204

Model of thermally activated magnetization reversal in thin films of amorphous rare-earth-transition-metal alloys  

Science Journals Connector (OSTI)

Monte Carlo simulations on a two-dimensional lattice of magnetic dipoles have been performed to investigate the magnetic reversal by thermal activation in rare-earth-transition-metal (RE-TM) alloys. Three mechanisms of magnetization reversal were observed: nucleation dominated growth, nucleation followed by the growth of magnetic domains containing no seeds of unreversed magnetization, and nucleation followed by dendritic domain growth by successive branching in the motion of the domain walls. The domain structures are not fractal; however, the fractal dimension of the domain wall was found to be a good measure of the jaggedness of the domain boundary surface during the growth process. The effects of the demagnetizing field on the hysteretic and time-dependent properties of the thin films were studied and some limitations in the application of the Fatuzzo model on magneto-optic media are identified.

A. Lyberatos; J. Earl; R. W. Chantrell

1996-03-01T23:59:59.000Z

205

X-ray-absorption spectroscopy investigation of the martensitic structural transformation in the RCu (R=rare earth) series  

Science Journals Connector (OSTI)

We present an x-ray-absorption spectroscopy (XAS) investigation performed at the L1,3 edges of the rare earth Y K edge and K and L2,3 edges of copper in several R-Cu intermetallic compounds: RCu (R=Y,Gd,Tb), Y1-xTbxCu, and Y1-xTbxCuyAg1-y. XAS spectra at the different absorption edges evidence the apparition of a strong electronic perturbation in the systems after the martensitic transformation. The dynamics of the structural transformation is discussed in terms of the interplay between the modification of both d-band widening and s-d transfer pressure.

Jesús Chaboy and M. R. Ibarra

1995-08-01T23:59:59.000Z

206

A strong magneto-optical activity in rare-earth La{sup 3+} substituted M-type strontium ferrites  

SciTech Connect

M-type strontium ferrites with substitution of Sr{sup 2+} by rare-earth La{sup 3+} were prepared by conventional ceramic technology. The structure, magnetic properties, and magneto-optical Kerr activity of Sr{sub 1-x}La{sub x}Fe{sub 12}O{sub 19} (x = 0, 0.05, 0.10, 0.15, 0.20) were investigated by x-ray diffraction (XRD), vibrating sample magnetometer (VSM), and magneto-optical ellipsometry, respectively. X-ray diffraction showed that the samples sintered at 1290 deg. C for 3 h were single M-type hexagonal ferrites. The magnetic properties were remarkably changed due to the valence change of Fe ions induced by the substitution of La ions. Most significantly, an important magneto-optical activity was induced in the La{sup 3+} substituted M-type strontium ferrites around 3 eV.

Hu Feng; Liu Xiansong; Zhu Deru [Engineering Technology Research Center of Magnetic Materials, Anhui Province, School of Physics and Materials Science, Anhui University, Hefei 230039 (China); Fernandez-Garcia, Lucia; Suarez, Marta; Luis Menendez, Jose [Centro de Investigacion en Nanomateriales y Nanotecnologia (CINN), Consejo Superior de Investigaciones Cientificas (CSIC) - Universidad de Oviedo - UO - Principado de Asturias, Parque Tecnologico de Asturias, 33428 Llanera, Asturias (Spain)

2011-06-01T23:59:59.000Z

207

Rare earth magnetic order in RNi{sub 2}B{sub 2}C and RNiBC  

SciTech Connect

A review of neutron diffraction experiments on the magnetic order in the RNi{sub 2}B{sub 2}C and RNiBC (R-rare earth) systems is given. The RNi{sub 2}B{sub 2}C materials exhibit a wide variety of commensurate and incommensurate magnetic structures for different rare earths, along with superconductivity that is coupled to the magnetism. Simple commensurate antiferromagnetic structures are observed for R = Pr (T{sub N} = 4.0 K), Nd (T{sub N} = 4.8 K), Ho (T{sub N} = 8.5 K) and Dy (T{sub N} = 4.8 K). In addition, HoNi{sub 2}B{sub 2}C exhibits a c-axis spiral and an a-axis modulated incommensurate structure above 5 K, while both structures collapse in favor of the commensurate structure at low T. A transversely polarized spin density wave (SDW) type incommensurate structure is observed for Er (T{sub N} = 6.8 K) and Tm (T{sub N} = 1.5 K), while a longitudinally polarized SDW structure is observed for Tb (T{sub N} = 15 K). No magnetic ordering of any type is detected for Y, Ce and Yb. HoNiBC is an antiferromagnet (T{sub N} = 9.8 K), ErNiBC is a ferromagnetic (T{sub C} = 4.6 K), while TbNiBC and DyNiBC exhibit both ferromagnetic and antiferromagnetic ordering at 17 K and {approximately} 13 K, respectively.

Skanthakumar, S. [Argonne National Lab., IL (United States). Chemistry Div.; Lynn, J.W. [National Inst. of Standards, Gaithersburg, MD (United States). Center for Neutron Research

1998-07-05T23:59:59.000Z

208

Growth and microstructure of MTG REBa2Cu3O7/RE?2BaCuO5 with heavy rare earth elements  

Science Journals Connector (OSTI)

New melt textured REBa2Cu3O7/RE?2BaCuO5 composites, have been obtained by top seeding melt-texturing growth. Two different starting mixtures of \\{REBa2Cu3O7\\} superconducting powders and insulating \\{Y2BaCuO5\\} phase were used. On one hand RE is a natural mixture of heavy rare earth elements (Y, Yb, Lu, Er, Dy, Tm, Ho) extracted from the Brazilian mineral “Xenotime”, and on the other hand, RE is thulium. In both cases melt textured REBa2Cu3O7/RE?2BaCuO5 composites have been obtained where RE and RE? are different mixtures of heavy rare earth/yttrium and Tm/yttrium. The composition analysis shows different areas within the RE?2BaCuO5 as a consequence of an inhomogeneous RE distribution, due to the differential solubility of each rare earth in the high temperature semisolid state. During the crystallization process a profound inversion of the rare earth composition between the superconducting matrix and the insulating precipitates occurs. Yttrium is selectively located in the 123 matrix and RE in the 211 particles. Heavy RE ions can substitute yttrium in MTG REBCO without degradation of the superconducting properties. A model for the crystallization process is proposed.

A.E. Carrillo; P. Rodr??guez Jr.; T. Puig; A. Palau; X. Obradors; H. Zheng; U. Welp; L. Chen; B.W. Veal; H. Claus; G.W. Crabtree

2002-01-01T23:59:59.000Z

209

Geophysics-based method of locating a stationary earth object  

DOE Patents (OSTI)

A geophysics-based method for determining the position of a stationary earth object uses the periodic changes in the gravity vector of the earth caused by the sun- and moon-orbits. Because the local gravity field is highly irregular over a global scale, a model of local tidal accelerations can be compared to actual accelerometer measurements to determine the latitude and longitude of the stationary object.

Daily, Michael R. (Albuquerque, NM); Rohde, Steven B. (Corrales, NM); Novak, James L. (Albuquerque, NM)

2008-05-20T23:59:59.000Z

210

On-the-fly machine-learning for high-throughput experiments: search for rare-earth-free permanent magnets  

SciTech Connect

Advanced materials characterization techniques with ever-growing data acquisition speed and storage capabilities represent a challenge in modern materials science, and new procedures to quickly assess and analyze the data are needed. Machine learning approaches are effective in reducing the complexity of data and rapidly homing in on the underlying trend in multi-dimensional data. Here, we show that by employing an algorithm called the mean shift theory to a large amount of diffraction data in high-throughput experimentation, one can streamline the process of delineating the structural evolution across compositional variations mapped on combinatorial libraries with minimal computational cost. Data collected at a synchrotron beamline are analyzed on the fly, and by integrating experimental data with the inorganic crystal structure database (ICSD), we can substantially enhance the accuracy in classifying the structural phases across ternary phase spaces. We have used this approach to identify a novel magnetic phase with enhanced magnetic anisotropy which is a candidate for rare-earth free permanent magnet.

Kusne, Aaron Gilad [University of Maryland; Gao, Tieren [University of Maryland; Mehta, Apurva [SLAC National Accelerator Laboratory; Ke, Liqin [Ames Laboratory; Nguyen, Manh Cuong [Ames Laboratory; Ho, Kai-Ming [Ames Laboratory; Antropov, Vladimir [Ames Laboratory; Wang, Cai-Zhuang [Ames Laboratory; Kramer, Matthew J [Ames Laboratory; Long, Christian [University of Maryland; Takeuchi, Ichiro [University of Maryland

2014-09-15T23:59:59.000Z

211

Local structure around rare-earth ions in B{sub 2}O{sub 3} glass at high pressure  

SciTech Connect

Melt quenching of B{sub 2}O{sub 3} with less than 25 mol. % rare-earth oxide (RE{sub 2}O{sub 3}) at ambient pressure results in a milky white glass because of liquid-liquid phase separation into B{sub 2}O{sub 3} and RE{sub 2}O{sub 3}{center_dot}3B{sub 2}O phases. In contrast, we have found that melt quenching under GPa-order pressure realizes a transparent RE-doped B{sub 2}O{sub 3} glass. This study investigates the local structure around the RE ions in the B{sub 2}O{sub 3} glass prepared at 3 GPa using optical measurements and electron-spin-echo envelope modulation spectroscopy. It is shown that the RE-rich microparticles disappear and the RE ions are isolated from each other in a highly symmetric crystal field formed by triangular and tetrahedral boron units. This result is consistent with that extrapolated from the data for RE-doped sodium borate glasses.

Funabiki, Fuji [Frontier Research Center, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503 (Japan)] [Frontier Research Center, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503 (Japan); Matsuishi, Satoru [Research Center for Strategic Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503 (Japan)] [Research Center for Strategic Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503 (Japan); Hosono, Hideo [Frontier Research Center, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503 (Japan) [Frontier Research Center, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503 (Japan); Research Center for Strategic Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503 (Japan); Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503 (Japan)

2013-06-14T23:59:59.000Z

212

Earth  

NLE Websites -- All DOE Office Websites (Extended Search)

Enthusiastic employees: sustaining the Earth January 30, 2014 Green Teams work hard to make sustainable choices at home, at work The Lab has made many energy sustainable...

213

Earth  

NLE Websites -- All DOE Office Websites (Extended Search)

hydrological controls on carbon cycling in flood plain ecosystems into Earth System Models. - 5814 Nathan McDowell measures photosynthesis at the SUrvival MOrtality...

214

Rare Earth Elements:  

Science Journals Connector (OSTI)

...aegirine, magnetite and hematite; and (3) a massive central iron oxide facies containing 3 wt% REE2O3 (Chao et al. 1992...for several bivalent metal ions and cerium(III) with the acetylacetonate ion. Journal of Physical Chemistry 59: 235-237 Lehmann...

Anthony E. Williams-Jones; Artashes A. Migdisov; Iain M. Samson

215

Rare Earth Elements:  

Science Journals Connector (OSTI)

...start-up and processing costs because the need...way to electrical lighting in the 1930s, about...glaucoma, and other medical applications. To...energy-efficient fluorescent lighting (Gibson and Parkinson...come at such a high cost to the environment...

Anton R. Chakhmouradian; Frances Wall

216

IUPAC-NIST Solubility Data Series. 100. Rare Earth Metal Fluorides in Water and Aqueous Systems. Part 1. Scandium Group (Sc, Y, La)  

SciTech Connect

This work presents an assessment of solubility data for rare earth metal fluorides (generally of trivalent metals and of CeF{sub 4}) in water and in aqueous ternary systems. Compilations of all available experimental data are introduced for each rare earth metal fluoride with a corresponding critical evaluation. Every such evaluation contains a collection of all solubility results in water, a selection of suggested solubility data, and a brief discussion of the multicomponent systems. Because the ternary systems were seldom studied more than once, no critical evaluations of such data were possible. Only simple fluorides (no complexes or binary salts) are treated as the input substances in this report. The literature has been covered through the end of 2013.

Mioduski, Tomasz [Institute of Nuclear Chemistry and Technology, 03195 Warsaw (Poland); Gumi?ski, Cezary, E-mail: cegie@chem.uw.edu.pl [Department of Chemistry, University of Warsaw, 02093 Warsaw (Poland); Zeng, Dewen, E-mail: dewen-zeng@hotmail.com [College of Chemistry and Chemical Engineering, Central South University, 410083 Changsha (China)

2014-03-15T23:59:59.000Z

217

The interplay of long-range magnetic order and single-ion anisotropy in rare earth nickel germanides  

SciTech Connect

This dissertation is concerned with the interplay of long-range order and anisotropy in the tetragonal RNi{sub 2}Ge{sub 2} (R = rare earth) family of compounds. Microscopic magnetic structures were studied using both neutron and x-ray resonant exchange scattering (XRES) techniques. The magnetic structures of Tb, Dy, Eu and Gd members have been determined using high-quality single-crystal samples. This work has correlated a strong Fermi surface nesting to the magnetic ordering in the RNi{sub 2}Ge{sub 2} compounds. Generalized susceptibility, {chi}{sub 0}(q), calculations found nesting to be responsible for both incommensurate ordering wave vector in GdNi{sub 2}Ge{sub 2}, and the commensurate structure in EuNi{sub 2}Ge{sub 2}. A continuous transition from incommensurate to commensurate magnetic structures via band filling is predicted. The surprisingly higher T{sub N} in EuNi{sub 2}Ge{sub 2} than that in GdNi{sub 2}Ge{sub 2} is also explained. Next, all the metamagnetic phases in TbNi{sub 2}Ge{sub 2} with an applied field along the c axis have been characterized with neutron diffraction measurements. A mixed phase model for the first metamagnetic structure consisting of fully-saturated as well as reduced-moment Tb ions is presented. The moment reduction may be due to moment instability which is possible if the exchange is comparable to the low-lying CEF level splitting and the ground state is a singlet. In such a case, certain Tb sites may experience a local field below the critical value needed to reach saturation.

Islam, Z.

1999-05-10T23:59:59.000Z

218

Enhancement of thermopower of TAGS-85 high-performance thermoelectric materials by doping with the rare earth Dy  

SciTech Connect

Enhancement of thermopower is achieved by doping the narrow-band semiconductor Ag{sub 6.52}Sb{sub 6.52}Ge{sub 36.96}Te{sub 50} (acronym TAGS-85), one of the best p-type thermoelectric materials, with 1 or 2% of the rare earth dysprosium (Dy). Evidence for the incorporation of Dy into the lattice is provided by X-ray diffraction and increased orientation-dependent local fields detected by {sup 125}Te NMR spectroscopy. Since Dy has a stable electronic configuration, the enhancement cannot be attributed to 4f-electron states formed near the Fermi level. It is likely that the enhancement is due to a small reduction in the carrier concentration, detected by {sup 125}Te NMR spectroscopy, but mostly due to energy filtering of the carriers by potential barriers formed in the lattice by Dy, which has large both atomic size and localized magnetic moment. The interplay between the thermopower, the electrical resistivity, and the thermal conductivity of TAGS-85 doped with Dy results in an enhancement of the power factor (PF) and the thermoelectric figure of merit (ZT) at 730 K, from PF = 28 ?W cm{sup ?1} K{sup ?2} and ZT ? 1.3 in TAGS-85 to PF = 35 ?W cm{sup ?1} K{sup ?2} and ZT ? 1.5 in TAGS-85 doped with 1 or 2% Dy for Ge. This makes TAGS-85 doped with Dy a promising material for thermoelectric power generation.

Levin, Evgenii; Budko, Serfuei; Schmidt-Rohr, Klaus

2012-04-10T23:59:59.000Z

219

Am phases in the matrix of a U-Pu-Zr alloy with Np, Am, and rare-earth elements  

SciTech Connect

Phases and microstructures in the matrix of an as-cast U-Pu-Zr alloy with 3 wt% Am, 2% Np, and 8% rare-earth elements were characterized by scanning and transmission electron microscopy. The matrix consists primarily of two phases, both of which contain Am: ?-(U, Np, Pu, Am) (~70 at% U, 5% Np, 14% Pu, 1% Am, and 10% Zr) and ?-(U, Np, Pu, Am)Zr2 (~25% U, 2% Np, 10-15% Pu, 1-2% Am, and 55-60 at% Zr). These phases are similar to those in U-Pu-Zr alloys, although the Zr content in ?-(U, Np, Pu, Am) is higher than that in ?-(U, Pu) and the Zr content in ?-(U, Np, Pu, Am)Zr2 is lower than that in ?-UZr2. Nanocrystalline actinide oxides with structures similar to UO2 occurred in some areas, but may have formed by reactions with the atmosphere during sample handling. Planar features consisting of a central zone of ?-(U, Np, Pu, Am) bracketed by zones of ?-(U, Np, Pu, Am)Zr2 bound irregular polygons ranging in size from a few micrometers to a few tens of micrometers across. The rest of the matrix consists of elongated domains of ?-(U, Np, Pu, Am) and ?-(U, Np, Pu, Am)Zr2. Each of these domains is a few tens of nanometers across and a few hundred nanometers long. The domains display strong preferred orientations involving areas a few hundred nanometers to a few micrometers across.

Dawn E Janney; J. Rory Kennedy; James W. Madden; Thomas P. O'Holleran

2015-01-01T23:59:59.000Z

220

Nonphotochemical hole burning of organic dyes and rare earth ions in polymers and glasses: a probe of the amorphous state  

SciTech Connect

New and in depth studies of amorphous materials (e.g., glasses and polymers) probed via the low temperature optical technique of nonphotochemical hole burning (NPHB) are presented. An extensive review of the phenomena itself, along with selected topics involving the use of persistent hole burning techniques, is given. In addition, a semi-complete tabulation of essentially all hole burning systems to date is included. The deuteration dependence in an amorphous host is examined for the system of tetracene in an ethanol/methanol mixture. The results illustrate the importance of hydrogen bonding in the hole burning process. The discovery of a highly efficient (or facile) class of hole burning systems, i.e., ionic dyes in hydroxylated polymers (i.e., poly(vinyl alcohol) (PVOH) and poly(acrylic acid) (PAA)), is presented and discussed. Ultrafast relaxation processes (i.e., dephasing) are studied for the system of cresyl violet perchlorate (CV) in PVOH. Further, for the first time, NPHB of rare earth ions, specifically Pr/sup +3/ and Nd/sup +3/, in a soft organic glass (i.e., PVOH) is discussed briefly. Detailed experimental results of two related phenomena, spontaneous hole filling (SPHF) and laser induced hole filling (LIHF), are presented and discussed for several systems: rhodamine 560 perchlorate (R560), rhodamine 640 perchlorate (R640), CV, Pr/sup +3/ and Nd..mu../sup 3/ in either PVOH or PAA. A theoretical model is developed for SPHF. The model invokes a correlated feedback mechanism from the anti-hole, which is able to account for the fact that no line broadening is observed. A tentative model is also presented for the phenomenon of LIHF.

Fearey, B.L.

1986-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
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221

Application of the Kerman-Klein Method to the Solution of a Spherical Shell Model for a Deformed Rare-Earth Nucleus  

Science Journals Connector (OSTI)

Put forward more than three decades ago as an alternative to conventional shell-model calculations, the Kerman-Klein method has proved feasible previously only when applied to unrealistically small configuration spaces or when phenomenological simplifications have been superposed. Starting from a spherical shell-model Hamiltonian, we describe a fully microscopic calculation, free of the above limitations, of the properties of the ground-state band of a typical deformed rare-earth nucleus, 158Gd.

Pavlos Protopapas and Abraham Klein

1997-06-09T23:59:59.000Z

222

Thorium, uranium and rare earth elements content in lanthanide concentrate (LC) and water leach purification (WLP) residue of Lynas advanced materials plant (LAMP)  

SciTech Connect

Lynas Advanced Materials Plant (LAMP) has been licensed to produce the rare earths elements since early 2013 in Malaysia. LAMP processes lanthanide concentrate (LC) to extract rare earth elements and subsequently produce large volumes of water leach purification (WLP) residue containing naturally occurring radioactive material (NORM). This residue has been rising up the environmental issue because it was suspected to accumulate thorium with significant activity concentration and has been classified as radioactive residue. The aim of this study is to determine Th-232, U-238 and rare earth elements in lanthanide concentrate (LC) and water leach purification (WLP) residue collected from LAMP and to evaluate the potential radiological impacts of the WLP residue on the environment. Instrumental Neutron Activation Analysis and ?-spectrometry were used for determination of Th, U and rare earth elements concentrations. The results of this study found that the concentration of Th in LC was 1289.7 ± 129 ppm (5274.9 ± 527.6Bq/kg) whereas the Th and U concentrations in WLP were determined to be 1952.9±17.6 ppm (7987.4 ± 71.9 Bq/kg) and 17.2 ± 2.4 ppm respectively. The concentrations of Th and U in LC and WLP samples determined by ?- spectrometry were 1156 ppm (4728 ± 22 Bq/kg) and 18.8 ppm and 1763.2 ppm (7211.4 Bq/kg) and 29.97 ppm respectively. This study showed that thorium concentrations were higher in WLP compare to LC. This study also indicate that WLP residue has high radioactivity of {sup 232}Th compared to Malaysian soil natural background (63 - 110 Bq/kg) and come under preview of Act 304 and regulations. In LC, the Ce and Nd concentrations determined by INAA were 13.2 ± 0.6% and 4.7 ± 0.1% respectively whereas the concentrations of La, Ce, Nd and Sm in WLP were 0.36 ± 0.04%, 1.6%, 0.22% and 0.06% respectively. This result showed that some amount of rare earth had not been extracted and remained in the WLP and may be considered to be reextracted.

AL-Areqi, Wadeeah M., E-mail: walareqi@yahoo.com; Majid, Amran Ab., E-mail: walareqi@yahoo.com; Sarmani, Sukiman, E-mail: walareqi@yahoo.com [Nuclear Science Programme, School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi (Malaysia)

2014-02-12T23:59:59.000Z

223

A new N-hydroxyethyliminodiacetic acid modified core–shell silica phase for chelation ion chromatography of alkaline earth, transition and rare earth elements  

Science Journals Connector (OSTI)

Abstract Bare core–shell silica (1.7 ?m) has been modified with iminodiacetic acid functional groups via standard silane chemistry, forming a new N-hydroxyethyliminodiacetic acid (HEIDA) functionalised core–shell stationary phase. The column was applied in high-performance chelation ion chromatography and evaluated for the retention of alkaline earth, transition and heavy metal cations. The influence of nitric acid eluent concentration, addition of complexing agent dipicolinic acid, eluent pH and column temperature on the column performance was investigated. The efficiencies obtained for transition and heavy metal cations (and resultant separations) were comparable or better than those previously obtained for alternative fully porous silica based chelation stationary phases, and a similarly modified monolithic silica column, ranging from ?15 to 56 ?m HETP. Increasing the ionic strength of the eluent with the addition of KNO3 (0.75 M) and increasing the column temperature (70 °C) facilitated the isocratic separation of a mixture of 14 lanthanides and yttrium in under 12 min, with HETP averaging 18 ?m (7 ?m for Ce(III))

Nicola McGillicuddy; Ekaterina P. Nesterenko; Pavel N. Nesterenko; Elaine M. Stack; Jesse O. Omamogho; Jeremy D. Glennon; Brett Paull

2013-01-01T23:59:59.000Z

224

Large Diffractive Optics for GEo-Based Earth Surveillance  

SciTech Connect

The natural vantage point for performing Earth-centric operations from space is geosynchronous orbit (GEO); a platform there moves at the same rate as the Earth's surface, so appears to continually ''hover'' over a fixed site on the Earth. Unlike spacecraft in other orbits, which rapidly fly-over targets, a GEO-based platform remains in-position all the time. In order to insure continual access to sites using low earth orbit (LEO) platforms, one needs a large enough constellation ({approx} 50) of spacecraft so that one is always overhead; in contrast, a single GEO platform provides continuous coverage over sites throughout Euro-Asia. This permanent coverage comes, unfortunately, with a stiff price-tag; geosynchronous orbit is 36,000 km high, so space platforms there must operate at ranges roughly 100 times greater than ones located in LEO. For optical-based applications, this extreme range is difficult to deal with; for surveillance the price is a 100-fold loss of resolution, for laser weapons it is a 10,000-fold loss in flux-on-target. These huge performance penalties are almost always unacceptable, preventing us from successfully using GEO-based platforms. In practice, we are forced to either settle for brief, infrequent access to targets, or, if we demand continuous coverage, to invest in large, many-satellite, constellations. There is, fortunately, a way to use GEO-based optical platforms without incurring the huge, range-dependent, performance penalties; one must simply use bigger optics. As long as the aperture of a platform's optics increases as much as its operating range, then its performance (resolution and/or flux) does not suffer; the price for operating from GEO is simply 100-fold larger optics. This is, of course, a very stiff price; while meter-class optics may suffice for many low-earth-orbit applications, 100 meter apertures are needed in order to achieve similar performance from GEO. Since even the largest Earth-based telescope is only 10 meters in diameter, building ten-fold larger ones for GEO applications (let alone delivering and operating them there) presents major difficulties. However, since the challenges of fielding large platforms in GEO are matched by the benefits of continuous coverage, we propose a program to develop such optical platforms. In this section, we will examine a particular form of large aperture optic, using a flat diffractive lens instead of the more conventional curved reflectors considered elsewhere in this report. We will discuss both the development of this type of large aperture optics, as well as the steps necessary to use it for GEO-based Earth surveillance. In a later section of this report we will discuss another use for large diffractive optics, their application for global-reach laser weapons.

Hyde, R A

2003-09-11T23:59:59.000Z

225

Observation of coherent population transfer in a four-level tripod system with a rare-earth-metal-ion-doped crystal  

Science Journals Connector (OSTI)

Coherent population transfer in a laser-driven four-level system in a tripod configuration is experimentally investigated with a rare-earth-metal-ion-doped crystal (Pr3+:Y2SiO5). The population transfers observed here indicate that a main process inducing them is not optical pumping, which is an incoherent process inducing population transfer. Moreover, numerical simulation, which well reproduces the experimental results, also shows that the process inducing the observed population transfers is similar to stimulated Raman adiabatic passage (STIRAP) in the sense that this process possesses characteristic features of STIRAP.

Hayato Goto and Kouichi Ichimura

2007-03-15T23:59:59.000Z

226

Ground-state properties of rare-earth nuclei in the relativistic Hartree-Bogoliubov model with density-dependent meson-nucleon couplings  

Science Journals Connector (OSTI)

The relativistic mean-field effective interaction with density-dependent meson-nucleon couplings DD-ME1 is tested in the calculation of deformed nuclei. Ground-state properties of six isotopic chains (60?Z?70) in the region of rare-earth nuclei are calculated by using the relativistic Hartree-Bogoliubov (RHB) model with the DD-ME1 mean-field interaction, and with the Gogny D1S force for the pairing interaction. Results of fully self-consistent RHB calculations for the total binding energies, charge isotope shifts, and quadrupole deformation parameters are compared with the available empirical data.

T. Nikši?; D. Vretenar; G. A. Lalazissis; P. Ring

2004-04-21T23:59:59.000Z

227

Theory of low energy excitations in resonant inelastic x-ray scattering for rare-earth systems: Yb compounds as typical examples  

Science Journals Connector (OSTI)

Theoretical predictions are given for low energy excitations, such as crystal field excitations and Kondo resonance excitations, to be detected by high-resolution measurements of resonant inelastic x-ray scattering (RIXS) of rare-earth materials with Yb compounds as typical examples. Crystal field excitations in the Yb 3d RIXS of a Yb3+ ion in the cubic crystal field are formulated, and the calculation of RIXS spectra for YbN is done. Kondo resonance excitations revealed in the Yb 3d RIXS spectra are calculated for mixed-valence Yb compounds, Yb1-xLuxAl3, in the leading term approximation of the 1/Nf expansion method with a single impurity Anderson model. It is emphasized that the high-resolution RIXS with polarization dependence is a powerful tool to study the crystal field levels together with their symmetry and also the Kondo bound state in rare-earth compounds. Some in-depth discussions are given on the polarization effects of RIXS, including 4d and 2p RIXS spectra, the coherence effect of the Kondo bound states, and the importance of the high-resolution RIXS spectra for condensed matter physics under extreme conditions.

A. Kotani

2011-04-25T23:59:59.000Z

228

Tracking target objects orbiting earth using satellite-based telescopes  

DOE Patents (OSTI)

A system for tracking objects that are in earth orbit via a constellation or network of satellites having imaging devices is provided. An object tracking system includes a ground controller and, for each satellite in the constellation, an onboard controller. The ground controller receives ephemeris information for a target object and directs that ephemeris information be transmitted to the satellites. Each onboard controller receives ephemeris information for a target object, collects images of the target object based on the expected location of the target object at an expected time, identifies actual locations of the target object from the collected images, and identifies a next expected location at a next expected time based on the identified actual locations of the target object. The onboard controller processes the collected image to identify the actual location of the target object and transmits the actual location information to the ground controller.

De Vries, Willem H; Olivier, Scot S; Pertica, Alexander J

2014-10-14T23:59:59.000Z

229

Stakeholder value network analysis for space-based earth observations  

E-Print Network (OSTI)

The Earth Science and Applications decadal survey released by the National Research Council in 2007 presents both an ambitious engineering challenge and a challenge for the entire Earth science community to come together ...

Sutherland, Timothy A. (Timothy Alan)

2009-01-01T23:59:59.000Z

230

From the center of Earth to the rim of the solar system, Earth and Space Sciences furthers our understanding of Earth, the solar system, and their histories. Based on the geologic record  

E-Print Network (OSTI)

From the center of Earth to the rim of the solar system, Earth and Space Sciences furthers our understanding of Earth, the solar system, and their histories. Based on the geologic record and on rigorous observation and modeling of Earth's present state, our activities cut across traditional disciplines

Anderson, Richard

231

X-ray absorption and resonant x-ray emission spectra by electric quadrupole excitation in light rare-earth systems  

Science Journals Connector (OSTI)

We have made precise theoretical calculations for both 2p3/2?4f x-ray absorption spectra and 3d?2p3/2 resonant x-ray emission spectra involving electric quadrupole excitations at the L3 edge of light rare-earth elements from La to Eu. It is shown that the energy separation of a double-peak structure observed by x-ray absorption spectroscopy (XAS) does not agree with that determined from resonant x-ray emission spectroscopy (RXES), in contrast to recent experimental results by Bartolomé et al. The reason for this difference is that the energy separation in XAS is determined by the 4f-4f interaction only, while that in RXES is determined by both 4f-4f and 3d-4f interactions.

M. Nakazawa; K. Fukui; H. Ogasawara; A. Kotani; C. F. Hague

2002-09-26T23:59:59.000Z

232

Ground States of the Ising Model on the Shastry-Sutherland Lattice and the Origin of the Fractional Magnetization Plateaus in Rare-Earth-Metal Tetraborides  

Science Journals Connector (OSTI)

A complete and exact solution of the ground-state problem for the Ising model on the Shastry-Sutherland lattice in an applied magnetic field is found. The magnetization plateau at one third of the saturation value is shown to be the only possible fractional plateau in this model. However, stripe magnetic structures with 1/2 and 1/n (n>3) magnetization, observed in the rare-earth-metal tetraborides RB4, occur at the boundaries of the three-dimensional regions of the ground-state phase diagram. These structures give rise to new magnetization plateaus if interactions of longer range are taken into account. For instance, an additional third-neighbor interaction is shown to produce a 1/2 plateau. The results obtained significantly refine the understanding of the magnetization process in RB4 compounds, especially in TmB4 and ErB4, which are strong Ising magnets.

Yu. I. Dublenych

2012-10-16T23:59:59.000Z

233

EARTH SCIENCES DIVISION. ANNUAL REPORT 1977.  

E-Print Network (OSTI)

8erkeley Laboratory (LBL), the Earth Sciences Division, wasactivation analysis: rare earth element distribution (D)can be used to generate earth- quake records for use in

Witherspoon, P.A.

2011-01-01T23:59:59.000Z

234

An Astrophysical View of Earth-Based Metabolic Biosignature Gases  

E-Print Network (OSTI)

Microbial life on Earth uses a wide range of chemical and energetic resources from diverse habitats. An outcome of this microbial diversity is an extensive and varied list of metabolic byproducts. We review key points of ...

Seager, Sara

235

JOURNAL DE PHYSIQUE Colloque C5, supplkment au no 5, Tome 40, Mai 1979, page C5-63 Heat capacity of rare earth metals near the melting point and the vacancy  

E-Print Network (OSTI)

of rare earth metals near the melting point and the vacancy mechanism of melting T. Gorecki (*) Max. -The vacancy mechanism of the melting process is utilized as a starting point for deriving the formula point and changes of the same properties of metals due to the creation of vacancies has been

Paris-Sud XI, Université de

236

Pair-Preference and Site-Preference Models for Rare-Earth Iron Garnets Exhibiting Noncubic Magnetic Anisotropies  

Science Journals Connector (OSTI)

The pair anisotropy model is extended to include the next-nearest-neighbor tetrahedral-iron ions. An anisotropy model based on growth-induced preferential site occupation is derived using the pair model. With the site model the nearest-neighbor tetrahedral- and nearest-neighbor octahedral-iron ions lead solely to a uniaxial anisotropy under both growth facets. Inclusion of the next-nearest-neighbor tetrahedral-iron ions results in the experimentally observed orthorhombic anisotropies.

A. Rosencwaig; W. J. Tabor; R. D. Pierce

1971-03-29T23:59:59.000Z

237

Synthesis of main group, rare-earth, and d{sup 0} metal complexes containing beta-hydrogen  

SciTech Connect

A series of organometallic compounds containing the tris(dimethylsilyl)methyl ligand are described. The potassium carbanions KC(SiHMe{sub 2}){sub 3} and KC(SiHMe{sub 2}){sub 3}TMEDA are synthesized by deprotonation of the hydrocarbon HC(SiHMe{sub 2}){sub 3} with potassium benzyl. KC(SiHMe{sub 2}){sub 3}TMEDA crystallizes as a dimer with two types of three-center-two-electron KH- Si interactions. Homoleptic Ln(III) tris(silylalkyl) complexes containing ?-SiH groups M{C(SiHMe{sub 2}){sub 3}}{sub 3} (Ln = Y, Lu, La) are synthesized from salt elimination of the corresponding lanthanide halide and 3 equiv. of KC(SiHMe{sub 2}){sub 3}. The related reactions with Sc yield bis(silylalkyl) ate-complexes containing either LiCl or KCl. The divalent calcium and ytterbium compounds M{C(SiHMe{sub 2}){sub 3}}{sub 2}L (M = Ca, Yb; L = THF{sub 2} or TMEDA) are prepared from MI{sub 2} and 2 equiv of KC(SiHMe{sub 2}){sub 3}. The compounds M{C(SiHMe{sub 2}){sub 3}}{sub 2}L (M = Ca, Yb; L = THF{sub 2} or TMEDA) and La{C(SiHMe{sub 2}){sub 3}}{sub 3} react with 1 equiv of B(C{sub 6}F{sub 5}){sub 3} to give 1,3- disilacyclobutane {Me2Si-C(SiHMe2)2}2 and MC(SiHMe2)3HB(C6F5)3L, and La{C(SiHMe{sub 2}){sub 3}}{sub 2}HB(C{sub 6}F{sub 5}){sub 3}, respectively. The corresponding reactions of Ln{C(SiHMe{sub 2}){sub 3}}{sub 3} (Ln = Y, Lu) give the ?-SiH abstraction product [{(Me{sub 2}HSi){sub 3}C}{sub 2}LnC(SiHMe{sub 2}){sub 2}SiMe{sub 2}][HB(C{sub 6}F{sub 5}){sub 3}] (Ln = Y, Lu), but the silene remains associated with the Y or Lu center. The abstraction reactions of M{C(SiHMe{sub 2}){sub 3}}{sub 2}L (M = Ca, Yb; L = THF{sub 2 }or TMEDA) and Ln{C(SiHMe{sub 2}){sub 3}}{sub 3} (Ln = Y, Lu, La) and 2 equiv of B(C{sub 6}F{sub 5}){sub 3} give the expected dicationic M{HB(C{sub 6}F{sub 5}){sub 3}}{sub 2}L (M = Ca, Yb; L = THF{sub 2} or TMEDA) and dicationic mono(silylalkyl) LnC(SiHMe{sub 2}){sub 3}{HB(C{sub 6}F{sub 5}){sub 3}}{sub 2} (Ln = Y, Lu, La), respectively. Salt metathesis reactions of Cp{sub 2}(NR{sub 2})ZrX (X = Cl, I, OTf; R = t-Bu, SiHMe{sub 2}) and lithium hydrosilazide ultimately afford hydride products Cp{sub 2}(NR{sub 2})ZrH that suggest unusual ?-hydrogen elimination processes. A likely intermediate in one of these reactions, Cp{sub 2}Zr[N(SiHMe{sub 2})t-Bu][N(SiHMe{sub 2}){sub 2}], is isolated under controlled synthetic conditions. Addition of alkali metal salts to this zirconium hydrosilazide compound produces the corresponding zirconium hydride. However as conditions are varied, a number of other pathways are also accessible, including C-H/Si-H dehydrocoupling, ?-abstraction of a CH, and ?-abstraction of a SiH. Our observations suggest that the conversion of (hydrosilazido)zirconocene to zirconium hydride does not follow the classical four-center ?- elimination mechanism. Elimination and abstraction reactions dominate the chemistry of ligands containing ?- hydrogen. In contrast, Cp{sub 2}Zr{N(SiHMe{sub 2}){sub 2}}H and Cp{sub 2}Zr{N(SiHMe{sub 2}){sub 2}}Me undergo selective ?-CH bond activation to yield the azasilazirconacycle Cp{sub 2Zr}{?{sup 2}-N(SiHMe{sub 2})SiHMeCH{sub 2}}, even though there are reactive ?-hydrogen available for abstraction. The ?-SiH groups in metallacycle provide access to new pathways for sixteen-electron zirconium alkyl compounds, in which Cp{sub 2}Zr{?{sup 2}-N(SiHMe{sub 2})SiHMeCH{sub 2}} undergoes a rare ?-bond metathesis reaction with ethylene. The resulting vinyl intermediate undergoes ?-hydrogen abstraction to reform ethylene and a silanimine zirconium species that reacts with ethylene to give a metallacyclopentane as the isolated product. The pendent ?-SiH in metallocycle also reacts with paraformaldehyde through an uncatalyzed hydrosilylation to form an exocyclic methoxysilyl moiety, while the zirconium-carbon bond in metallocycle is surprisingly inert toward formaldehyde. Still, the Zr-C moiety in metallocycle is available for chemistry, and it interacts with the carbon monoxide and strong electrophile B(C{sub 6}F{sub 5}){sub 3} to provide Cp{sub 2}Zr[?{sup 2}- OC(=CH{sub 2})SiMeHN(SiHMe

Yan, Ka King [Ames Laboratory

2013-05-02T23:59:59.000Z

238

Distribution of rare earth elements in marine sediments from the Strait of Sicily (western Mediterranean Sea): Evidence of phosphogypsum waste contamination  

Science Journals Connector (OSTI)

Concentrations of rare earth elements (REE), Y, Th and Sc were recently determined in marine sediments collected using a box corer along two onshore–offshore transects located in the Strait of Sicily (Mediterranean Sea). The REE + Y were enriched in offshore fine-grained sediments where clay minerals are abundant, whereas the REE + Y contents were lower in onshore coarse-grained sediments with high carbonate fractions. Considering this distribution trend, the onshore sediments in front of the southwestern Sicilian coast represent an anomaly with high REE + Y concentrations (mean value 163.4 ?g g?1) associated to high Th concentrations (mean value 7.9 ?g g?1). Plot of shale-normalized REE + Y data of these coastal sediments showed Middle REE enrichments relative to Light REE and Heavy REE, manifested by a convexity around Sm–Gd–Eu elements. These anomalies in the fractionation patterns of the coastal sediments were attributed to phosphogypsum-contaminated effluents from an industrial plant, located in the southern Sicilian coast.

G. Tranchida; E. Oliveri; M. Angelone; A. Bellanca; P. Censi; M. D’Elia; R. Neri; F. Placenti; M. Sprovieri; S. Mazzola

2011-01-01T23:59:59.000Z

239

Anomalies in the Young modulus at structural phase transitions in rare-earth cobaltites RBaCo{sub 4}O{sub 7} (R = Y, Tm-Lu)  

SciTech Connect

The elastic properties of rare-earth cobaltites RBaCo{sub 4}O{sub 7} (R = Y, Tm-Lu) have been experimentally studied in the temperature range of 80-300 K. The strong softening of the Young modulus {Delta}E(T)/E{sub 0} Almost-Equal-To -(0.1-0.2) of cobaltites with Lu and Yb ions has been revealed, which is due to the instability of the crystal structure upon cooling and is accompanied by an inverse jump at the second-order structural phase transition. The softening of the Young modulus and the jump at the phase transition decrease by an order of magnitude and the transition temperature T{sub s} and hysteresis {Delta}T{sub s} increase from a compound with Lu to that with Tm. A large softening of the Young modulus at the structural transition in Lu- and Yb cobaltites indicates that the corresponding elastic constant goes to zero, whereas this constant in Tm cobaltite is not a 'soft' mode of the phase transition. It has been found that the structural phase transition in Lu- and Yb cobaltites is accompanied by a large absorption maximum at the phase transition point and an additional maximum in the low-temperature phase and absorption anomalies in Tm cobaltite is an order of magnitude smaller.

Kazei, Z. A., E-mail: kazei@plms.phys.msu.ru; Snegirev, V. V.; Andreenko, A. S. [Moscow State University (Russian Federation); Kozeeva, L. P. [Russian Academy of Sciences, Nikolaev Institute of Inorganic Chemistry, Siberian Branch (Russian Federation)

2011-08-15T23:59:59.000Z

240

Rare-earth elements in the atmosphere of the magnetic chemically peculiar star HD 144897. New classification of the Nd III spectrum  

E-Print Network (OSTI)

We have obtained a UVES spectrum of a slowly rotating strongly magnetic Ap star, HD 144897, that exhibits very large overabundances of rare-earth elements. Here we present a detailed spectral analysis of this object, also taking into account effects of non-uniform vertical distribution (stratification) of chemical elements. We have determined the photospheric abundances of 40 ions. For seven elements (Mg, Si, Ca, Ti, Cr, Mn, Fe), we have obtained a stratification model that allow us to produce a satisfactory fit to the observed profiles of spectral lines of various strength. REEs abundances, that for the first time in the literature have been determined from the lines of the first and second ions, have been found typically four dex larger than solar abundances. Our analysis of REE spectral lines provide a strong support to the laboratory line classification and determination of the atomic parameters. The only remarkable exception is Nd III, for which spectral synthesis was found to be inconsistent with the ob...

Ryabchikova, T A; Kochukhov, O; Ryabtsov, A V

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

A novel contrast agent with rare earth-doped up-conversion luminescence and Gd-DTPA magnetic resonance properties  

SciTech Connect

The magnetic-luminescent multifunctional nanoparticles based on Gd-DTPA and NaYF{sub 4}:Yb, Er were successfully synthesized by the conjugation of activated DTPA and silica-coated/surface-aminolated NaYF{sub 4}:Yb, Er nanoparticles through EDC/NHS coupling chemistry. The as-prepared products were characterized by powder X-ray diffraction, transmission electron microscopy, dynamic light scattering, energy dispersive X-ray analysis, and fourier transform infrared spectrometry. The room-temperature upconversion luminescent spectra and T{sub 1}-weighted maps of the obtained nanoparticles were carried out by 980 nm NIR light excitation and a 3T MR imaging scanner, respectively. The results indicated that the as-synthesized multifunctional nanoparticles with small size, highly solubility in water, and both high MR relaxivities and upconversion luminescence may have potential usage for MR imaging in future. - Graphical abstract: We have synthesized magnetic-luminescent multifunctional nanoparticles based on Gd-DTPA and NaYF4:Yb, Er by the conjugation of activated DTPA and silica-coated/surface-aminolated NaYF4:Yb, Er nanoparticles through EDC/NHS coupling chemistry. Highlights: Black-Right-Pointing-Pointer A novel magnetic-luminescent multifunctional nanoparticles are synthesized. Black-Right-Pointing-Pointer The nanoparticles are highly efficient for luminescence and T{sub 1}-weighted MR imaging. Black-Right-Pointing-Pointer The nanoparticles are small in size and highly solubility in water. Black-Right-Pointing-Pointer The nanoparticles hold great potential usage for future biomedical engineering.

Lu Qing [Department of Radiology, Shanghai Renji Hospital, Shanghai Jiao Tong University School of Medicine, 1630 Dong Fang Rd, Shanghai 200127 (China); Wei Daixu [National Engineering Research Center for Nanotechnology, 28 East Jiang Chuan Rd, Shanghai 200241 (China); Cheng Jiejun [Department of Radiology, Shanghai Renji Hospital, Shanghai Jiao Tong University School of Medicine, 1630 Dong Fang Rd, Shanghai 200127 (China); Xu Jianrong, E-mail: xujianr@hotmail.com [Department of Radiology, Shanghai Renji Hospital, Shanghai Jiao Tong University School of Medicine, 1630 Dong Fang Rd, Shanghai 200127 (China); Zhu Jun, E-mail: yzjzhu@163.com [National Engineering Research Center for Nanotechnology, 28 East Jiang Chuan Rd, Shanghai 200241 (China)

2012-08-15T23:59:59.000Z

242

Earth’s magnetism  

Science Journals Connector (OSTI)

Earth’s magnetism, geomagnetism, terrestrial magnetism [The magnetism of the Earth] ? Erdmagnetismus m, Geomagnetismus

2014-08-01T23:59:59.000Z

243

Global Lifetime Measurements of Highly-Deformed and Other Rotational Structures in the A~135 Light Rare-Earth Region: Probing the Single-Particle Motion in a Rotating Potential  

E-Print Network (OSTI)

It has been possible, using GAMMASPHERE plus Microball,to extract differential lifetime measurements free from common systematic errors for over 15 different nuclei (various isotopes of Ce, Pr, Nd, Pm, and Sm) at high spin within a single experiment. This comprehensive study establishes the effective single-particle quadrupole moments in the A~135 light rare-earth region. Detailed comparisons are made with calculations using the self-consistent cranked mean-field theory.

M. A. Riley; R. W. Laird; F. G. Kondev; D. J. Hartley; D. E. Archer; T. B. Brown; R. M. Clark; M. D evlin; P. Fallon; I. M. Hibbert; D. T. Joss; D. R. LaFosse; P. J. Nolan; N. J. O'Brien; E. S. Paul; J. Pfohl; D. G. Sarantites; R. K. Sheline; S. L. Shepherd; J. Simpson; R. Wadsworth; M. T. Matev; A. V. Afanasjev; J. Dobaczewski; G. A. Lalazissis; W. Nazarewicz; W. Satula

2001-05-15T23:59:59.000Z

244

Capturing near-Earth asteroids around Earth Zaki Hasnain n  

E-Print Network (OSTI)

metals and semiconducting elements on Earth may be supplemented or even replaced by the reserves floating propellant to transport spacecraft between space habitats, Earth, the Moon, the asteroids, and beyond. Rare-Earth Capturing near-Earth asteroids around Earth Zaki Hasnain n , Christopher A. Lamb, Shane D. Ross

Ross, Shane

245

Rare earth doped TiO2-CdS and TiO2-CdS composites with improvement of photocatalytic hydrogen evolution under visible light irradiation  

Science Journals Connector (OSTI)

In this paper, we report the obtention of a series of rare earth doped composite Pt/RE/TiO2-CdS (RE=La3+, Eu3+, Er3+, Gd3+) and TiO2-CdS photocatalysts prepared by a simple mechanical mixed method. The photocatalysts properties were studied by means of ultraviolet-visible spectroscopy, photoluminiscence spectra, X-ray diffraction, transmission electron microscopy, specific surface areas and the electrochemistry method. Photocatalytic hydrogen evolution using Na2S/Na2SO3 as electron donor was investigated under visible-light (??420 nm) irradiation. The rare earth doping enhances the activities of Pt/RE/TiO2-CdS samples (with 1.0 wt% deposited Pt). Under optimum conditions, the activities of La3+, Eu3+, Er3+, Gd3+ doped composite Pt/RE/TiO2-CdS increase by 62.0%, 40.4%, 34.7% and 30.0% respectively, when compared to that of Pt/TiO2-CdS, due to the prevention of electron–hole recombination and the flat-band potential of the conduction of TiO2 shifting negatively by the doping.

Shaoqin Peng; Yahui Huang; Yuexiang Li

2013-01-01T23:59:59.000Z

246

E-Print Network 3.0 - alkaline earth cations Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

the cation (alkaline, rare earth... to the cation size. Knowing that the size of rare earth elements and alkaline cations decreases in the following... of results on tungstate...

247

E-Print Network 3.0 - alkaline earth lithium Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

the cation (alkaline, rare earth... to the cation size. Knowing that the size of rare earth elements and alkaline cations decreases in the following... of results on tungstate...

248

EARTH SCIENCES DIVISION ANNUAL REPORT 1978  

E-Print Network (OSTI)

of electrolytes: IX, rare earth chlorides, nitrates, andU E OF AQUIFER RESPONSE TO EARTH TIDES AS A MEANS O F SLawrence Berkeley Laboratory, Earth Sciences Division, 1977.

Authors, Various

2012-01-01T23:59:59.000Z

249

Muon diagnostics of the Earth’s atmosphere and magnetosphere  

Science Journals Connector (OSTI)

A method of distant monitoring of the Earth’s magnetosphere and atmosphere is described, which is based on the close correlation between the modulations in the flux of atmospheric muons detected at the Earth’s su...

N. S. Barbashina; V. V. Borog…

2007-07-01T23:59:59.000Z

250

A Subbasin-based framework to represent land surface processes in an Earth System Model  

SciTech Connect

Realistically representing spatial heterogeneity and lateral land surface processes within and between modeling units in earth system models is important because of their implications to surface energy and water exchange. The traditional approach of using regular grids as computational units in land surface models and earth system models may lead to inadequate representation of lateral movements of water, energy and carbon fluxes, especially when the grid resolution increases. Here a new subbasin-based framework is introduced in the Community Land Model (CLM), which is the land component of the Community Earth System Model (CESM). Local processes are represented assuming each subbasin as a grid cell on a pseudo grid matrix with no significant modifications to the existing CLM modeling structure. Lateral routing of water within and between subbasins is simulated with the subbasin version of a recently-developed physically based routing model, Model for Scale Adaptive River Routing (MOSART). As an illustration, this new framework is implemented in the topographically diverse region of the U.S. Pacific Northwest. The modeling units (subbasins) are delineated from high-resolution Digital Elevation Model while atmospheric forcing and surface parameters are remapped from the corresponding high resolution datasets. The impacts of this representation on simulating hydrologic processes are explored by comparing it with the default (grid-based) CLM representation. In addition, the effects of DEM resolution on parameterizing topography and the subsequent effects on runoff processes are investigated. Limited model evaluation and comparison showed that small difference between the averaged forcing can lead to more significant difference in the simulated runoff and streamflow because of nonlinear horizontal processes. Topographic indices derived from high resolution DEM may not improve the overall water balance, but affect the partitioning between surface and subsurface runoff. More systematic analyses are needed to determine the relative merits of the subbasin representation compared to the commonly used grid-based representation, especially when land surface models are approaching higher resolutions.

Tesfa, Teklu K.; Li, Hongyi; Leung, Lai-Yung R.; Huang, Maoyi; Ke, Yinghai; Sun, Yu; Liu, Ying

2014-05-20T23:59:59.000Z

251

Interplay of superconductivity, magnetism, and density waves in rare-earth tritellurides and iron-based superconducting materials  

E-Print Network (OSTI)

107 Figure IV.3: Electrical resistance R vs. temperature TRoom-temperature electrical resistance vs. applied load andanvil cell (DAC) electrical resistivity vs. temperature for

Zocco, Diego Andrés

2011-01-01T23:59:59.000Z

252

Interplay of superconductivity, magnetism, and density waves in rare-earth tritellurides and iron-based superconducting materials  

E-Print Network (OSTI)

3. Magnetism in Metals . . . . . . . . . . . . . . . . .IV Superconductivity and Magnetism in Iron-PnictideIII Superconductivity, Magnetism and Charge-Density Waves in

Zocco, Diego Andrés

2011-01-01T23:59:59.000Z

253

CoolEarth formerly Cool Earth Solar | Open Energy Information  

Open Energy Info (EERE)

CoolEarth formerly Cool Earth Solar CoolEarth formerly Cool Earth Solar Jump to: navigation, search Name CoolEarth (formerly Cool Earth Solar) Place Livermore, California Zip 94550 Product CoolEarth is a concentrated PV developer using inflatable concentrators to focus light onto triple-junction cells. References CoolEarth (formerly Cool Earth Solar)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. CoolEarth (formerly Cool Earth Solar) is a company located in Livermore, California . References ↑ "CoolEarth (formerly Cool Earth Solar)" Retrieved from "http://en.openei.org/w/index.php?title=CoolEarth_formerly_Cool_Earth_Solar&oldid=343892" Categories: Clean Energy Organizations

254

New ternary rare-earth metal boride carbides R{sub 15}B{sub 4}C{sub 14} (R=Y, Gd-Lu) containing BC{sub 2} units: Crystal and electronic structures, magnetic properties  

SciTech Connect

The ternary rare-earth boride carbides R{sub 15}B{sub 4}C{sub 14} (R=Y, Gd-Lu) were prepared from the elements by arc-melting followed by annealing in silica tubes at 1270 K for 1 month. The crystal structures of Tb{sub 15}B{sub 4}C{sub 14} and Er{sub 15}B{sub 4}C{sub 14} were determined from single crystal X-ray diffraction data. They crystallize in a new structure type in space group P4/mnc (Tb{sub 15}B{sub 4}C{sub 14}: a=8.1251(5) A, c=15.861(1) A, Z=2, R{sub 1}=0.041 (wR{sub 2}=0.088) for 1023 reflections with I{sub o}>2{sigma}(I{sub o}); Er{sub 15}B{sub 4}C{sub 14}: a=7.932(1) A, c=15.685(2) A, Z=2, R{sub 1}=0.037 (wR{sub 2}=0.094) for 1022 reflections with I{sub o}>2{sigma}(I{sub o})). The crystal structure contains discrete carbon atoms and bent CBC units in octahedra and distorted bicapped square antiprisms, respectively. In both structures the same type of disorder exists. One R atom position needs to be refined as split atom position with a ratio 9:1 indicative of a 10% substitution of the neighboring C{sup 4-} by C{sub 2}{sup 4-}. The actual composition has then to be described as R{sub 15}B{sub 4}C{sub 14.2}. The isoelectronic substitution does not change the electron partition of R{sub 15}B{sub 4}C{sub 14} which can be written as (R{sup 3+}){sub 15}(C{sup 4-}){sub 6}(CBC{sup 5-}){sub 4{center_dot}}e{sup -}. The electronic structure was studied with the extended Hueckel method. The investigated compounds Tb{sub 15}B{sub 4}C{sub 14}, Dy{sub 15}B{sub 4}C{sub 14} and Er{sub 15}B{sub 4}C{sub 14} are hard ferromagnets with Curie temperatures T{sub C}=145, 120 and 50 K, respectively. The coercive field B{sub C}=3.15 T for Dy{sub 15}B{sub 4}C{sub 14} is quite remarkable. - Graphical abstract: The ternary rare earth boride carbides R{sub 15}B{sub 4}C{sub 14} (R=Y, Gd-Lu) were prepared from the elements by arc-melting followed by annealing in silica tubes at 1270 K for 1 month. Tb{sub 15}B{sub 4}C{sub 14} is a new member of the rare-earth metal boride carbide series in which the finite quasi-molecular CBC entities as well as isolated C atoms are embedded in the voids of the metal atom matrix. The structure of Tb{sub 15}B{sub 4}C{sub 14} contains two types of slabs: one slab contains finite bent CBC units and isolated carbon atoms whereas another is formed only from octahedral coordinated single carbon atoms. The electronic structure for the idealized composition corresponds to an electron partitioning according to (Tb{sup 3+}){sub 15}(C{sup 4-}){sub 6}(CBC{sup 5-}){sub 4{center_dot}}e{sup -} giving rise to a single electron per formula for Tb-Tb framework bonding. The magnetism of the ternary rare earth boride carbides R{sub 15}B{sub 4}C{sub 14} (R=Tb, Dy, Er) is characterized by the onset of ferromagnetic order below T<150 K.

Babizhetskyy, Volodymyr, E-mail: v.babizhetskyy@fkf.mpg.d [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, Postfach 800665, D-70569 Stuttgart (Germany); Simon, Arndt; Mattausch, Hansjuergen [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, Postfach 800665, D-70569 Stuttgart (Germany); Hiebl, Kurt [Arbeitsgruppe Neue Materialien, Universitaet Wien, Waehringerstrasse 42, A-1090 Wien (Austria); Zheng Chong [Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL 60115 (United States)

2010-10-15T23:59:59.000Z

255

New retaining wall design criteria based on lateral earth pressure measurements  

E-Print Network (OSTI)

. , 72 1X LIST OF FIGURES Figures Page Condition of Active Rankine State, Cantilever Wall . . 3 Cross Section of Cantilever Wall Location of Earth Pressure Cells, Cantilever Wall Movement Measurement Scheme, Cantilever Wall. 12 Measured Lateral... INTRODUCTION Earth Pressure Theories -- The principles of limiting equilibrium mechanics are used to desiqn earth retaining structures. In this approach the pressures that would exist at a failure condition are predicted from Coulomb or Rankine (13...

Wright, William Vincent

2012-06-07T23:59:59.000Z

256

The role of N2O derived from crop-based biofuels, and from agriculture in general, in Earth's climate  

Science Journals Connector (OSTI)

...The role of N2O derived from crop-based biofuels, and from agriculture in general, in Earth's...factor (EF) of 3-5%, and applied it to biofuel production. For first-generation biofuels, e.g. biodiesel from rapeseed and bioethanol...

2012-01-01T23:59:59.000Z

257

The B61-based "Robust Nuclear Earth Penetrator:" Clever retrofit or headway towards fourth-generation nuclear weapons?  

E-Print Network (OSTI)

It is scientifically and technically possible to build an earth penetrating device that could bury a B61-7 warhead 30 meters into concrete, or 150 meters into earth, before detonating it. The device (based on knowledge and technology that is available since 50 years) would however by large and cumbersome. Better penetrator materials, components able to withstand larger stresses, higher impact velocities, and/or high-explosive driven penetration aids, can only marginally improve the device. It is conclude that the robust nuclear earth penetrator (RNEP) program may be as much motivated by the development of new technology directly applicable to next generation nuclear weapons, and by the political necessity to periodically reasses the role and utility of nuclear weapons, then by the perceived military need of a weapon able to destroy deeply buried targets.

Gsponer, A

2005-01-01T23:59:59.000Z

258

Mixed Conduction in Rare-Earth Phosphates  

E-Print Network (OSTI)

their  metal  to  phosphorous  ratio  can  be  varied;  materials,   as   the   phosphorous   to   metal   ratio  tetrahedron.    As   the  phosphorous  content  of  the  

Ray, Hannah Leung

2012-01-01T23:59:59.000Z

259

The Use of Rare Earths in Photovoltaics  

Science Journals Connector (OSTI)

The metal-insulator semiconductor (MIS) junction used as an alternative solar cell is reviewed. The properties of the new solar cell barrier metals Sc, Y, Lu and Yb are discussed and compared with other barrie...

P. Munz; E. Bucher

1982-01-01T23:59:59.000Z

260

Non-Rare Earth magnetic materials  

Energy.gov (U.S. Department of Energy (DOE))

2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Mixed Conduction in Rare-Earth Phosphates  

E-Print Network (OSTI)

compressed   air,   flywheels,   biofuels,   hydropower,   and   electrochemical   energy   storage  

Ray, Hannah Leung

2012-01-01T23:59:59.000Z

262

Mixed Conduction in Rare-Earth Phosphates  

E-Print Network (OSTI)

fundamentals   of   mixed   protonic   and   electronic  the  fundamentals  of  mixed  protonic  and  electronic  better  fundamental  understanding  of  mixed  electronic  

Ray, Hannah Leung

2012-01-01T23:59:59.000Z

263

A PHYSICS-BASED SOFTWARE FRAMEWORK FOR SUN-EARTH CONNECTION MODELING  

E-Print Network (OSTI)

. The SWMF is a structured collection of software building blocks to develop components for Sun-Earth system modeling, to couple them, and to assemble them into applications. A component is created from the user

Stout, Quentin F.

264

Prevention sequence mechanisms (PSM) for Near Earth Objects (NEOs) based on a three parameter scheme based classification framework  

E-Print Network (OSTI)

There is a significant amount of space debris from previous space endeavors left over by the Russians and the US, leave alone the possibility of collisions with Near Earth Objects (NEOs) like asteroids and comets. Currently, ...

Sahani, Rohan

2007-01-01T23:59:59.000Z

265

A Space Weather Information Service Based Upon Remote and In-Situ Measurements of Coronal Mass Ejections Heading for Earth  

E-Print Network (OSTI)

The Earth's magnetosphere is formed as a consequence of interaction between the planet's magnetic field and the solar wind, a continuous plasma stream from the Sun. A number of different solar wind phenomena have been studied over the past forty years with the intention of understanding and forecasting solar behavior. One of these phenomena in particular, Earth-bound interplanetary coronal mass ejections (CMEs), can significantly disturb the Earth's magnetosphere for a short time and cause geomagnetic storms. This publication presents a mission concept consisting of six spacecraft that are equally spaced in a heliocentric orbit at 0.72 AU. These spacecraft will monitor the plasma properties, the magnetic field's orientation and magnitude, and the 3D-propagation trajectory of CMEs heading for Earth. The primary objective of this mission is to increase space weather (SW) forecasting time by means of a near real-time information service, that is based upon in-situ and remote measurements of the aforementioned CM...

Ritter, Birgit; Miles, Oscar; Rußwurm, Michael; Scully, Stephen; Roldán, Andrés; Hartkorn, Oliver; Jüstel, Peter; Réville, Victor; Lupu, Sorina; Ruffenach, Alexis

2015-01-01T23:59:59.000Z

266

K-median clustering, model-based compressive sensing, and sparse recovery for earth mover distance  

E-Print Network (OSTI)

We initiate the study of sparse recovery problems under the Earth-Mover Distance (EMD). Specifically, we design a distribution over m x n matrices A such that for any x, given Ax, we can recover a k-sparse approximation ...

Indyk, Piotr

267

E-Print Network 3.0 - alkaline earths Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

REE with organic matter in alkaline organic rich-water. .H ZRUGV Rare earth... of rare earth elements (REE) to humic acid (HA) and carbonates was studied experimentally at various...

268

E-Print Network 3.0 - alkaline earth neptunatesiv Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

REE with organic matter in alkaline organic rich-water. .H ZRUGV Rare earth... of rare earth elements (REE) to humic acid (HA) and carbonates was studied experimentally at various...

269

E-Print Network 3.0 - alkaline earth halogenides Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

REE with organic matter in alkaline organic rich-water. .H ZRUGV Rare earth... of rare earth elements (REE) to humic acid (HA) and carbonates was studied experimentally at various...

270

E-Print Network 3.0 - alkaline earth zinc-aluminophosphate Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

REE with organic matter in alkaline organic rich-water. .H ZRUGV Rare earth... of rare earth elements (REE) to humic acid (HA) and carbonates was studied experimentally at various...

271

Electrochemical cell with negative active material based on an alkali or alkaline earth metal  

SciTech Connect

In an electrochemical cell the negative active material is an alkali or alkaline earth metal, such as lithium, and the electrolyte comprises a solute and at least one solvent selected from the liquid oxyhalides and which serves also as the positive active material. The electrolyte further comprises a mineral substance the effect of which is to significantly reduce the voltage rise delay of the cell.

Vallin, D.; Chenebault, P.; Grassien, J.-V.; Kerouanton, A.

1985-10-15T23:59:59.000Z

272

Earth's Three  

E-Print Network (OSTI)

Broadcast Transcript: From Mongolia, land of fermented mare's milk, comes this beguiling morsel of nomadic oral tradition. It's called yertonciin gorav or Earth's Three. Earth's three what? Well, Earth's three top things in a number of categories...

Hacker, Randi

2010-11-17T23:59:59.000Z

273

Earth Sciences Environmental Earth Sciences,  

E-Print Network (OSTI)

84 Earth Sciences­ Environmental Earth Sciences, Geology MGeol (Single Honours Degrees) Earth Sciences BSc (Single Honours Degrees) Environmental Earth Sciences Geology BSc (Joint Honours Degrees) and among the most research-intensive in Europe. Features * The Department of Earth and Environmental

Brierley, Andrew

274

Earth Sciences Environmental Earth Sciences,  

E-Print Network (OSTI)

94 Earth Sciences­ Environmental Earth Sciences, Geology Degree options MGeol (Single Honours Degrees) Earth Sciences BSc (Single Honours Degrees) Environmental Earth Sciences Geology BSc (Joint placement. * The Geology and Environmental Earth Sciences degrees are accredited by the Geological Society

Brierley, Andrew

275

Earth Forms.  

E-Print Network (OSTI)

??Earth Forms narrates and explains the Masters Project Exhibition by the same name. The sculptures included in the exhibition, Earth Forms, use a variety of… (more)

Mock, Janelle Marie Tullis

2010-01-01T23:59:59.000Z

276

Earth Videos  

NLE Websites -- All DOE Office Websites (Extended Search)

Earth Videos Earth Videos Our videos speak more than a thousand words about our science and technology, community outreach, collaborations, careers, and much more. News Releases...

277

Synthesis, crystal structure and properties of Mg{sub 3}B{sub 36}Si{sub 9}C and related rare earth compounds RE{sub 3?x}B{sub 36}Si{sub 9}C (RE=Y, Gd–Lu)  

SciTech Connect

We report on the synthesis and characterisation of Mg{sub 3}B{sub 36}Si{sub 9}C. Black single crystals of hexagonal shape were yielded from the elements at 1600 °C in h-BN crucibles welded in Ta ampoules. The crystal structure (space group R3{sup ¯}m, a=10.0793(13) Å, c=16.372(3) Å, 660 refl., 51 param., R{sub 1}(F)=0.019; wR{sub 2}(F{sup 2})=0.051) is characterized by a Kagome-net of B{sub 12} icosahedra, ethane like Si{sub 8}-units and disordered SiC-dumbbells. Vibrational spectra show typical features of boron-rich borides and Zintl phases. Mg{sub 3}B{sub 36}Si{sub 9}C is stable against HF/HNO{sub 3} and conc. NaOH. The micro-hardness is 17.0 GPa (Vickers) and 14.5 GPa (Knoop), respectively. According to simple electron counting rules Mg{sub 3}B{sub 36}Si{sub 9}C is an electron precise compound. Band structure calculations reveal a band gap of 1.0 eV in agreement to the black colour. Interatomic distances obtained from the refinement of X-ray data are biased and falsified by the disorder of the SiC-dumbbell. The most evident structural parameters were obtained by relaxation calculation. Composition and carbon content were confirmed by WDX measurements. The small but significant carbon content is necessary by structural reasons and frequently caused by contaminations. The rare earth compounds RE{sub 3?x}B{sub 36}Si{sub 9}C (RE=Y, Dy–Lu) are isotypic. Single crystals were grown from a silicon melt and their structures refined. The partial occupation of the RE-sites fits to the requirements of an electron-precise composition. According to the displacement parameters a relaxation should be applied to obtain correct structural parameters. - Graphical abstract: Single crystals of the new boridesilicide Mg{sub 3}B{sub 36}Si{sub 9}C were obtained from the elements in a Si-melt. Besides B{sub 12}-icosahedra and ethan-like Si{sub 8}-units it contains a disordered SiC-dumbbell. Correct distances were obtained by relaxation calculation based on the X-ray data. Highlights: • Black single crystals of Mg{sub 3}B{sub 36}Si{sub 9}C were yielded from the elements at 1600 °C. • The rare earth compounds RE{sub 3–x}B{sub 36}Si{sub 9}C (RE=Y, Gd–Lu) are isotypic. • Correct structural parameters result from X-ray data and subsequent relaxation.

Ludwig, Thilo; Pediaditakis, Alexis; Sagawe, Vanessa [Albert-Ludwigs-Universität Freiburg, Institut für Anorganische und Analytische Chemie, Albertstr. 21, D-79104 Freiburg (Germany); Freiburger Materialforschungszentrum FMF, Stefan-Maier-Str. 25, D-79104 Freiburg (Germany); Hillebrecht, Harald, E-mail: harald.hillebrecht@ac.uni-freiburg.de [Albert-Ludwigs-Universität Freiburg, Institut für Anorganische und Analytische Chemie, Albertstr. 21, D-79104 Freiburg (Germany); Freiburger Materialforschungszentrum FMF, Stefan-Maier-Str. 25, D-79104 Freiburg (Germany)

2013-08-15T23:59:59.000Z

278

Smiling Earth Energy LLC | Open Energy Information  

Open Energy Info (EERE)

Smiling Earth Energy LLC Jump to: navigation, search Name: Smiling Earth Energy LLC Place: Bakersfield, California Zip: 93314 Product: California based biodiesel producer and...

279

Carbon-Based Magnets: Discovery & Design of Novel Permanent Magnets using Non-strategic Elements having Secure Supply Chains  

SciTech Connect

REACT Project: VCU is developing a new magnet for use in renewable power generators and EV motors that requires no rare earth minerals. Rare earths are difficult and expensive to process, but they make electric motors and generators smaller, lighter, and more efficient. VCU would replace the rare earth minerals in EV motor magnets with a low-cost and abundant carbon-based compound that resembles a fine black powder. This new magnet could demonstrate the same level of performance as the best commercial magnets available today at a significantly lower cost. The ultimate goal of this project is to demonstrate this new magnet in a prototype electric motor.

None

2012-01-01T23:59:59.000Z

280

Critical Materials and Rare Futures: Ames Laboratory Signs a New Agreement  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Critical Materials and Rare Futures: Ames Laboratory Signs a New Critical Materials and Rare Futures: Ames Laboratory Signs a New Agreement on Rare-Earth Research Critical Materials and Rare Futures: Ames Laboratory Signs a New Agreement on Rare-Earth Research June 15, 2011 - 7:07pm Addthis The plasma torch in the Retech plasma furnace is one tool used in Materials Preparation Center to create ultra-high purity metal alloy samples, particularly rare-earth metals, located at the Ames Lab. | Photo Courtesy of the Ames Lab Flickr The plasma torch in the Retech plasma furnace is one tool used in Materials Preparation Center to create ultra-high purity metal alloy samples, particularly rare-earth metals, located at the Ames Lab. | Photo Courtesy of the Ames Lab Flickr Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

A Physically Based Runoff Routing Model for Land Surface and Earth System Models  

Science Journals Connector (OSTI)

A new physically based runoff routing model, called the Model for Scale Adaptive River Transport (MOSART), has been developed to be applicable across local, regional, and global scales. Within each spatial unit, surface runoff is first routed ...

Hongyi Li; Mark S. Wigmosta; Huan Wu; Maoyi Huang; Yinghai Ke; André M. Coleman; L. Ruby Leung

2013-06-01T23:59:59.000Z

282

Earth Planets Space, 00, 000--000, 2000 Solar Flare Mechanism Based on Magnetic Arcade  

E-Print Network (OSTI)

field lines, generation of magnetic islands in the magnetic arcade, and coalescence of magnetic islands reconnection of open magnetic field lines above a magnetic arcade [Sturrock (1968)] or reconnection of solar flares based on re­ sistive reconnection of magnetic field subject to continuous increase

283

Winter wheat yield forecasting in Ukraine based on Earth observation, meteorological data and biophysical models  

Science Journals Connector (OSTI)

Ukraine is one of the most developed agriculture countries and one of the biggest crop producers in the world. Timely and accurate crop yield forecasts for Ukraine at regional level become a key element in providing support to policy makers in food security. In this paper, feasibility and relative efficiency of using moderate resolution satellite data to winter wheat forecasting in Ukraine at oblast level is assessed. Oblast is a sub-national administrative unit that corresponds to the NUTS2 level of the Nomenclature of Territorial Units for Statistics (NUTS) of the European Union. NDVI values were derived from the MODIS sensor at the 250 m spatial resolution. For each oblast NDVI values were averaged for a cropland map (Rainfed croplands class) derived from the ESA GlobCover map, and were used as predictors in the regression models. Using a leave-one-out cross-validation procedure, the best time for making reliable yield forecasts in terms of root mean square error was identified. For most oblasts, NDVI values taken in April–May provided the minimum RMSE value when comparing to the official statistics, thus enabling forecasts 2–3 months prior to harvest. The NDVI-based approach was compared to the following approaches: empirical model based on meteorological observations (with forecasts in April–May that provide minimum RMSE value) and WOFOST crop growth simulation model implemented in the CGMS system (with forecasts in June that provide minimum RMSE value). All three approaches were run to produce winter wheat yield forecasts for independent datasets for 2010 and 2011, i.e. on data that were not used within model calibration process. The most accurate predictions for 2010 were achieved using the CGMS system with the RMSE value of 0.3 t ha?1 in June and 0.4 t ha?1 in April, while performance of three approaches for 2011 was almost the same (0.5–0.6 t ha?1 in April). Both NDVI-based approach and CGMS system overestimated winter wheat yield comparing to official statistics in 2010, and underestimated it in 2011. Therefore, we can conclude that performance of empirical NDVI-based regression model was similar to meteorological and CGMS models when producing winter wheat yield forecasts at oblast level in Ukraine 2–3 months prior to harvest, while providing minimum requirements to input datasets.

Felix Kogan; Nataliia Kussul; Tatiana Adamenko; Sergii Skakun; Oleksii Kravchenko; Oleksii Kryvobok; Andrii Shelestov; Andrii Kolotii; Olga Kussul; Alla Lavrenyuk

2013-01-01T23:59:59.000Z

284

A Physically Based Runoff Routing Model for Land Surface and Earth System Models  

SciTech Connect

A new physically based runoff routing model, called the Model for Scale Adaptive River Transport (MOSART), has been developed to be applicable across local, regional, and global scales. Within each spatial unit, surface runoff is first routed across hillslopes and then discharged along with subsurface runoff into a ‘‘tributary subnetwork’’ before entering the main channel. The spatial units are thus linked via routing through the main channel network, which is constructed in a scale-consistent way across different spatial resolutions. All model parameters are physically based, and only a small subset requires calibration.MOSART has been applied to the Columbia River basin at 1/ 168, 1/ 88, 1/ 48, and 1/ 28 spatial resolutions and was evaluated using naturalized or observed streamflow at a number of gauge stations. MOSART is compared to two other routing models widely used with land surface models, the River Transport Model (RTM) in the Community Land Model (CLM) and the Lohmann routing model, included as a postprocessor in the Variable Infiltration Capacity (VIC) model package, yielding consistent performance at multiple resolutions. MOSART is further evaluated using the channel velocities derived from field measurements or a hydraulic model at various locations and is shown to be capable of producing the seasonal variation and magnitude of channel velocities reasonably well at different resolutions. Moreover, the impacts of spatial resolution on model simulations are systematically examined at local and regional scales. Finally, the limitations ofMOSART and future directions for improvements are discussed.

Li, Hongyi; Wigmosta, Mark S.; Wu, Huan; Huang, Maoyi; Ke, Yinghai; Coleman, Andre M.; Leung, Lai-Yung R.

2013-06-13T23:59:59.000Z

285

Earth Tremors  

Science Journals Connector (OSTI)

... IN Prof. Milne's article in NATURE of December 26, he states that earth tremors are more frequent during the winter than during the ...

W. L. DALLAS

1896-02-27T23:59:59.000Z

286

146 Earth Science 147 Earth Science  

E-Print Network (OSTI)

146 Earth Science 147 Earth Science ESCI 101 The Earth or ESCI 102 Evolution of the Earth or ESCI 107 Oceans and Global Change or ESCI 108 Crises of the Earth ESCI 105 Introductory Lab for Earth Geophysics I ESCI 444 Exploration Geophysics II or ESCI 446 Solid Earth Geophysics Math and Other Sciences

Richards-Kortum, Rebecca

287

Earth tides  

SciTech Connect

Nineteen papers on gravity, tilt, and strain tides are compiled into this volume. Detailed chapters cover the calculation of the tidal forces and of the Earth's response to them, as well as actual observations of earth tides. Partial Contents: On Earth tides. The tidal forces: Tidal Forces. New Computations of the Tide-Generating Potential. Corrected Tables of Tidal Harmonics. The Theory of Tidal Deformations. Body Tides on an Elliptical, Rotating, Elastic and Oceanless Earth, Deformation of the Earth by Surface Loads. Gravimetric Tidal Loading Computed from Integrated Green's Functions. Tidal Friction in the Solid Earth. Loading Tides Versus Body Tides. Lunar Tidal Acceleration from Earth Satellite Orbit Analysis. Observations: gravity. Tidal Gravity in Britain: Tidal Loading and the Spatial Distribution of the Marine Tide. Tidal Loading along a Profile Europe-East Africa-South Asia-Australia and the Pacific Ocean. Detailed Gravity-Tide Spectrum between One and Four Cycles per Day. Observations: tilt and strain. Cavity and Topographic Effects in Tilt and Strain Measurement. Observations of Local Elastic Effects on Earth Tide Tilts and Strains.

Harrison, J.C.

1984-01-01T23:59:59.000Z

288

The role of N2O derived from crop-based biofuels, and from agriculture in general, in Earth's climate  

Science Journals Connector (OSTI)

...biofuels, and from agriculture in general, in Earth's...life cycle analysis (LCA) models, led to broadly...global emissions from agriculture. Independent modelling...life cycle analysis (LCA) models, led to broadly...global emissions from agriculture. Independent modelling...

2012-01-01T23:59:59.000Z

289

Earth tides, earthquake occurrence and earth deformation.  

E-Print Network (OSTI)

??An analysis of Earth deformation, earthquakes and tides has been undertaken using Earth tide and interferometric SAR data from ESA satellites. The ability of Earth… (more)

Kansowa, Tarek

2010-01-01T23:59:59.000Z

290

Rare muon processes  

SciTech Connect

The status of rare muon processes as tests of the standard model is reviewed with the emphasis on results that are expected from experiments in the near future.

Cooper, M.D.; The MEGA Collaboration

1993-05-01T23:59:59.000Z

291

Rare muon processes  

SciTech Connect

The status of rare muon processes as tests of the standard model is reviewed with the emphasis on results that are expected from experiments in the near future.

Cooper, M.D.

1993-01-01T23:59:59.000Z

292

Exploration of R2XM2 (R=Sc, Y, Ti, Zr, Hf, rare earth; X=main group element; M=transition metal, Si, Ge): Structural Motifs, the novel Compound Gd2AlGe2 and Analysis of the U3Si2 and Zr3Al2 Structure Types  

SciTech Connect

In the process of exploring and understanding the influence of crystal structure on the system of compounds with the composition Gd{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} several new compounds were synthesized with different crystal structures, but similar structural features. In Gd{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4}, the main feature of interest is the magnetocaloric effect (MCE), which allows the material to be useful in magnetic refrigeration applications. The MCE is based on the magnetic interactions of the Gd atoms in the crystal structure, which varies with x (the amount of Si in the compound). The crystal structure of Gd{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} can be thought of as being formed from two 3{sup 2}434 nets of Gd atoms, with additional Gd atoms in the cubic voids and Si/Ge atoms in the trigonal prismatic voids. Attempts were made to substitute nonmagnetic atoms for magnetic Gd using In, Mg and Al. Gd{sub 2}MgGe{sub 2} and Gd{sub 2}InGe{sub 2} both possess the same 3{sup 2}434 nets of Gd atoms as Gd{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4}, but these nets are connected differently, forming the Mo{sub 2}FeB{sub 2} crystal structure. A search of the literature revealed that compounds with the composition R{sub 2}XM{sub 2} (R=Sc, Y, Ti, Zr, Hf, rare earth; X=main group element; M=transition metal, Si, Ge) crystallize in one of four crystal structures: the Mo{sub 2}FeB{sub 2}, Zr{sub 3}Al{sub 2}, Mn{sub 2}AlB{sub 2} and W{sub 2}CoB{sub 2} crystal structures. These crystal structures are described, and the relationships between them are highlighted. Gd{sub 2}AlGe{sub 2} forms an entirely new crystal structure, and the details of its synthesis and characterization are given. Electronic structure calculations are performed to understand the nature of bonding in this compound and how electrons can be accounted for. A series of electronic structure calculations were performed on models with the U{sub 3}Si{sub 2} and Zr{sub 3}Al{sub 2} structures, using Zr and A1 as the building blocks. The starting point for these models was the U{sub 3}Si{sub 2} structure, and models were created to simulate the transition from the idealized U{sub 3}Si{sub 2} structure to the distorted Zr{sub 3}Al{sub 2} structure. Analysis of the band structures of the models has shown that the transition from the U{sub 3}Si{sub 2} structure to the Zr{sub 3}Al{sub 2} structure lifts degeneracies along the {Lambda} {yields} Z direction, indicating a Peierls-type mechanism for the displacement occurring in the positions of the Zr atoms.

Sean William McWhorter

2006-05-01T23:59:59.000Z

293

Earth's Magnetosphere  

NLE Websites -- All DOE Office Websites (Extended Search)

50 years ago - are a pair of donut shaped zones of charged particles that surround Earth and occupy the inner region of our planet's Magnetosphere. The outer belt contains...

294

Nd systematics of Earth are inconsistent with a superchondritic Sm/Nd ratio  

E-Print Network (OSTI)

to chondrites (2). The assumption that the refractory elements (e.g., rare earth elements) in the Earth. A basic assumption in most models for the Earth's composition is that the refractory elements are present not chondritic; it has long been known that Earth is de- pleted in volatile elements (e.g., K) relative

Mukhopadhyay, Sujoy

295

PUBLISHED ONLINE: 25 MAY 2014 | DOI: 10.1038/NGEO2170 Earth's earliest evolved crust generated in an  

E-Print Network (OSTI)

that this rock unit is characterized by iron enrichment, negative Europium anomalies, unfractionated rare-earth-element/Y, strong depletions in the heavy rare-earth elements (HREEs), and minor or absent Eu anomalies11LETTERS PUBLISHED ONLINE: 25 MAY 2014 | DOI: 10.1038/NGEO2170 Earth's earliest evolved crust

Machel, Hans

296

08/23/2007 09:59 PMInterstellar dust clouds may have sown seeds of life on Earth Page 1 of 2http://www.dailyindia.com/show/167969.php/Interstellar-dust-clouds-may-have-sown-seeds-of-life-on-Earth  

E-Print Network (OSTI)

://www.dailyindia.com/show/167969.php/Interstellar-dust-clouds-may-have-sown-seeds-of-life-on-Earth www.rare-earth-magnets.com Ads known elements necessary for supporting life on Earth. Adenine, an essential organic molecule, without) and Elliot McKee (St. Louis University). Copyright Dailyindia.com/ANI www.rare-earth-magnets.com Feedback

Glaser, Rainer

297

Florian SEITZ: Atmospheric and oceanic impacts to Earth rotations numerical studies with a dynamic Earth system model  

E-Print Network (OSTI)

with a dynamic Earth system model (completed in October 2004) Variations of Earth rotation are caused Earth system model DyMEG has been developed. It is based on the balance of angular momentum

Schuh, Harald

298

Google Earth Gallery  

NLE Websites -- All DOE Office Websites (Extended Search)

Google Earth Gallery Google Earth Gallery Use Google Earth to view our efforts in cleaning the past, protecting the present, and creating a sustainable future. Tours Air Quality...

299

Breaking Earth Poems  

E-Print Network (OSTI)

CALIFORNIA RIVERSIDE Breaking Earth Poems A Thesis submittedFestival……………………………………………………………………..…..14 Earth Against Mylittle else in their hands. Earth Against My Back I lay in

Hernandez, Scott Mcnaul

2012-01-01T23:59:59.000Z

300

Alternative Earth Resources Inc | Open Energy Information  

Open Energy Info (EERE)

Alternative Earth Resources Inc Alternative Earth Resources Inc Name Alternative Earth Resources Inc Address 840 - 1140 West Pender St. Place Vancouver, B.C. Zip V6E 4G1 Sector Geothermal energy Website http://www.alternative-earth.c References Alternative Earth Website[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! Alternative Earth Resources Inc is a company based in Vancouver, B.C.. Alternative Earth Resources Inc. (formerly Nevada Geothermal Power) is an experienced renewable energy company, focused on developing and generating clean, sustainable electric power from geothermal resources. The Company has headquarters in Vancouver, BC and trades on the Toronto Venture Exchange under the symbol AER. Alternative Earth holds leasehold interests in four geothermal projects

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Alternative Earth Resources Inc | Open Energy Information  

Open Energy Info (EERE)

Earth Resources Inc Earth Resources Inc (Redirected from Nevada Geothermal Power) Jump to: navigation, search Logo: Alternative Earth Resources Inc Name Alternative Earth Resources Inc Address 840 - 1140 West Pender St. Place Vancouver, B.C. Zip V6E 4G1 Sector Geothermal energy Website http://www.alternative-earth.c References Alternative Earth Website[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! Alternative Earth Resources Inc is a company based in Vancouver, B.C.. Alternative Earth Resources Inc. (formerly Nevada Geothermal Power) is an experienced renewable energy company, focused on developing and generating clean, sustainable electric power from geothermal resources. The Company has headquarters in Vancouver, BC and trades on the Toronto Venture

302

Synthesis, Structure and Characterization Of Polynuclear Rare Earth Alkoxide Clusters  

E-Print Network (OSTI)

analogues were characterized by spectrofluorimetry. Hexanuclear oxo-centered Dy and Gd clusters were synthesized: the OH-face capped Gd?(??-O)(??-OH)?(??-O)?(PhB(OEt)?)?(dpm)?(HOEt)? and Gd?(??-O)(??-OH)?(dpm)? as well as the edg-bridged [Dy?(??-O)(??-OCH?...

Dempsey, Scotty Lee

2014-04-30T23:59:59.000Z

303

What would we do without rare earths? | Critical Materials Institute  

NLE Websites -- All DOE Office Websites (Extended Search)

are a big part of our modern world. They are in clean energy technologies like wind turbines and solar cells and in many things we use every day -- cars, cell phones,...

304

Ultracold chemistry with alkali-metal-rare-earth molecules  

E-Print Network (OSTI)

A first principles study of the dynamics of $^6$Li($^{2}$S) + $^6$Li$^{174}$Yb($^2\\Sigma^+$)$ \\to ^6$Li$_2(^1\\Sigma^+$) + $^{174}$Yb($^1$S) reaction is presented at cold and ultracold temperatures. The computations involve determination and analytic fitting of a three-dimensional potential energy surface for the Li$_2$Yb system and quantum dynamics calculations of varying complexities, ranging from exact quantum dynamics within the close-coupling scheme, to statistical quantum treatment, and universal models. It is demonstrated that the two simplified methods yield zero-temperature limiting reaction rate coefficients in reasonable agreement with the full close-coupling calculations. The effect of the three-body term in the interaction potential is explored by comparing quantum dynamics results from a pairwise potential that neglects the three-body term to that derived from the full interaction potential. Inclusion of the three-body term in the close-coupling calculations was found to reduce the limiting rate ...

Makrides, C; Pradhan, G B; Petrov, A; Kendrick, B K; González-Lezana, T; Balakrishnan, N; Kotochigova, S

2014-01-01T23:59:59.000Z

305

Method for harvesting rare earth barium copper oxide single crystals  

DOE Patents (OSTI)

A method of preparing high temperature superconductor single crystals is disclosed. The method of preparation involves preparing precursor materials of a particular composition, heating the precursor material to achieve a peritectic mixture of peritectic liquid and crystals of the high temperature superconductor, cooling the peritectic mixture to quench directly the mixture on a porous, wettable inert substrate to wick off the peritectic liquid, leaving single crystals of the high temperature superconductor on the porous substrate. Alternatively, the peritectic mixture can be cooled to a solid mass and reheated on a porous, inert substrate to melt the matrix of peritectic fluid while leaving the crystals melted, allowing the wicking away of the peritectic liquid. 2 figs.

Todt, V.R.; Sengupta, S.; Shi, D.

1996-04-02T23:59:59.000Z

306

Non-Rare Earth High-Performance Wrought Magnesium Alloys  

Energy.gov (U.S. Department of Energy (DOE))

2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

307

Rare Earths Compounds DOI: 10.1002/ange.201002338  

E-Print Network (OSTI)

) characterized by covalent bonds between the transition metals (T) and the highly polarizable (monoatomic) carbon of the transition metals cause high negative charges on the complex carbometalate anions, which have to be balanced a special class of ternary and higher carbides containing complex anions n 1 ðTyCz�m� � � (n = 0, 1, 2, 3

Widom, Michael

308

Earth Day Haiku  

Science Journals Connector (OSTI)

Earth Day Haiku ... The winning entries in the 2003 Chemists Celebrate Earth Day poetry contest (sponsored by ACS) are presented. ...

2004-02-01T23:59:59.000Z

309

4, 71397166, 2004 The Modular Earth  

E-Print Network (OSTI)

, the typical approach towards Earth System Modeling has been to couple existing models of different domains computer modeling is to pursue Earth System models. The aim is to capture feedback mechanisms between philosophy to pursue an interactively coupled Earth System model ap- proach is partly based

Boyer, Edmond

310

Rare hadronic B decays  

E-Print Network (OSTI)

Rare hadronic B-meson decays allow us to study CP violation. The class of B decays final states containing two vector mesons provides a rich set of angular correlation observables to study. This article reviews some of the recent experimental results from the BaBar and Belle collaborations.

A. J. Bevan

2006-06-02T23:59:59.000Z

311

Earth Power Resources Inc | Open Energy Information  

Open Energy Info (EERE)

Earth Power Resources Inc Earth Power Resources Inc (Redirected from Earth Power Resources) Jump to: navigation, search Name Earth Power Resources Inc Address 2407 S Troost Avenue Place Tulsa, Oklahoma Zip 74114 Sector Geothermal energy Year founded 2000 References Website[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Earth Power Resources Inc is a company based in Tulsa, Oklahoma. Earth Power Resources Inc in Tulsa, OK is a private company categorized under: Electric Companies. Records show it was established in 2000 and incorporated in Oklahoma. References ↑ "Website" Retrieved from "http://en.openei.org/w/index.php?title=Earth_Power_Resources_Inc&oldid=598202"

312

GOOGLE EARTH QUICK GUIDE (1)Google Earth Features  

E-Print Network (OSTI)

GOOGLE EARTH QUICK GUIDE (1)Google Earth Features The Google Earth of the Google Earth window. Often when opening up the Google Earth program, the view screen will be a view of the entire Earth from space. Navigation bar

Smith-Konter, Bridget

313

Shaped by the past, creating the future Department of Earth Sciences  

E-Print Network (OSTI)

-Hf). Commonly analysed trace elements include the rare earth elements plus rst and second row transition: www.dur.ac.uk/earth.sciences/research/nciet 05585 Northern Centre Isotopic Elemental_05585 NorthernShaped by the past, creating the future Department of Earth Sciences Northern Centre for Isotopic

Wirosoetisno, Djoko

314

Earth'future climate  

Science Journals Connector (OSTI)

...their visions of the future I. Astronomy and Earth sciences compiled by J. M. T. Thompson Earth'future climate Mark A. Saunders 1 1 Benfield...provide informed scientific projections for Earth's climate into the next millennium. This...

1999-01-01T23:59:59.000Z

315

Protecting Life on Earth  

E-Print Network (OSTI)

Review: Protecting Life on Earth: An Introduction to thePeter B. Protecting Life on Earth: An Introduction to theof Protecting Life on Earth is “to explain to an intelligent

Anderson, Byron P.

2011-01-01T23:59:59.000Z

316

Earth System Modeling  

Science Journals Connector (OSTI)

Earth system models are important research tools for improving understanding ... climate system (and maybe never will), Earth system models nowadays typically focus on specific aspects, for...

Patrick Jöckel

2012-01-01T23:59:59.000Z

317

GIS-based methodologies for assessing nitrate,nitrite and ammonium distributions across a major UK basin,the Humber Hydrology and Earth System Sciences, 8(4), 823833 (2004) EGU  

E-Print Network (OSTI)

GIS-based methodologies for assessing nitrate,nitrite and ammonium distributions across a major UK basin,the Humber 823 Hydrology and Earth System Sciences, 8(4), 823833 (2004) © EGU GIS a Geographical Information System (GIS) framework. This basin contains diverse characteristics, from areas

Paris-Sud XI, Université de

318

Earth Structure Introduction  

E-Print Network (OSTI)

Earth Structure Introduction Earth Structure (2nd Edition), 2004 W.W. Norton & Co, New York Slide show by Ben van der Pluijm © WW Norton, unless noted otherwise #12;© EarthStructure (2nd ed) 210/4/2010 Aerial views #12;© EarthStructure (2nd ed) 310/4/2010 http://www.globalchange.umich.edu/Ben/ES/ #12

319

Different Er3+ environments in Mg-based nanoparticles-doped optical fibre  

E-Print Network (OSTI)

]. The original route proposed by LPMC to obtain NP in fibres is based on the industrial MCVD (Modified Chemical inherent to silica glass, it is proposed to embed rare- earth ions in dielectric nanoparticles. These results gain insight into the tayloring of luminescence properties. Keywords: silica, erbium

Paris-Sud XI, Université de

320

Manganese-Based Magnets: Manganese-Based Permanent Magnet with 40 MGOe at 200°C  

SciTech Connect

REACT Project: PNNL is working to reduce the cost of wind turbines and EVs by developing a manganese-based nano-composite magnet that could serve as an inexpensive alternative to rare-earth-based magnets. The manganese composite, made from low-cost and abundant materials, could exceed the performance of today’s most powerful commercial magnets at temperature higher than 200°C. Members of PNNL’s research team will leverage comprehensive computer high-performance supercomputer modeling and materials testing to meet this objective. Manganese-based magnets could withstand higher temperatures than their rare earth predecessors and potentially reduce the need for any expensive, bulky engine cooling systems for the motor and generator. This would further contribute to cost savings for both EVs and wind turbines.

None

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Allele age and a test for selection on rare alleles  

Science Journals Connector (OSTI)

...Charlesworth and P. H. Harvey Allele age and a test for selection on rare alleles Montgomery...recombination, leads to a statistical test of whether a rare allele has experienced natural selection. The test is based on finding whether there is too...

2000-01-01T23:59:59.000Z

322

The Colorado Rare Plant Technical Committee Rare Plant Symposium  

E-Print Network (OSTI)

The Colorado Rare Plant Technical Committee presents: 4th Annual Rare Plant Symposium Sponsored by: Colorado Native Plant Society University of Colorado Herbarium US Fish and Wildlife Service Colorado: G2G3/S2S3 Global distribution: Colorado (Larimer and Boulder counties). Possibly extending

323

Clouds and the Earth''s Radiant Energy System (CERES) Algorithm Theoretical Basis Document. Volume I-Overviews (Subsystem 0)  

Science Journals Connector (OSTI)

The theoretical bases for the Release 1 algorithms that will be used to process satellite data for investigation of the Clouds and the Earth''s Radiant Energy System (CERES) are described. The architecture for software implementation of the methodologies ...

Team CERES Science

1995-12-01T23:59:59.000Z

324

Ames Laboratory to Lead New Research Effort to Address Shortages in Rare  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Laboratory to Lead New Research Effort to Address Shortages in Laboratory to Lead New Research Effort to Address Shortages in Rare Earth and Other Critical Materials Ames Laboratory to Lead New Research Effort to Address Shortages in Rare Earth and Other Critical Materials January 9, 2013 - 12:13pm Addthis NEWS MEDIA CONTACT (202) 586-4940 WASHINGTON - The U.S. Department of Energy announced today that a team led by Ames Laboratory in Ames, Iowa, has been selected for an award of up to $120 million over five years to establish an Energy Innovation Hub that will develop solutions to the domestic shortages of rare earth metals and other materials critical for U.S. energy security. The new research center, which will be named the Critical Materials Institute (CMI), will bring together leading researchers from academia, four Department of Energy

325

Earth System Models  

Science Journals Connector (OSTI)

Earth system analysis — this term is often associated with the study of the ‘solid’ Earth with its surrounding spheres, the atmosphere, cryosphere, and hydrosphere. However, within IGBP (the International Geos...

Martin Clussen

2001-01-01T23:59:59.000Z

326

Argonne's Earth Day 2011  

ScienceCinema (OSTI)

Argonne celebrated Earth Day on April 21, 2011 with an event that featured green activities and information booths.

None

2013-04-19T23:59:59.000Z

327

Concerning the Facility for Rare Isotope Beams  

ScienceCinema (OSTI)

James Symons, Nuclear Science Division Director at Lawrence Berkeley Lab, and Daniela Leitner, head of operations at Berkeley Lab's 88-Inch Cyclotron, discuss major contributions to the new Facility for Rare Isotope Beams (FRIB) at Michigan State University, including ion source, which will based on the VENUS source built for the 88-Inch Cyclotron, and the GRETA gamma-ray detector now under construction there.

Symons, James

2013-05-29T23:59:59.000Z

328

Accretion of the Earth  

Science Journals Connector (OSTI)

...Issue Origin and differentiation of the Earth: past to present organized by Andrew Jephcoat and Alex Halliday Accretion of the Earth Robin M Canup * * ( robin@boulder.swri...Boulder, CO 80302, USA The origin of the Earth and its Moon has been the focus of an enormous...

2008-01-01T23:59:59.000Z

329

Earth Day Plus 40  

Science Journals Connector (OSTI)

Earth Day Plus 40 ... Many of our readers were not even born at the time of the first Earth Day, April 22, 1970. ... The first Earth Day was the brainchild of Wisconsin Senator Gaylord Nelson, who suggested the idea of a national “teach-in”. ...

Jerald L. Schnoor

2010-03-10T23:59:59.000Z

330

Supra-Earth affairs  

Science Journals Connector (OSTI)

...Martin Dominik and John C. Zarnecki Supra-Earth affairs Mazlan Othman * * mazlan.othman...Nations activities in the field of near-Earth objects in some detail, and suggests that...extra-terrestrial intelligence|near-Earth objects|international cooperation in...

2011-01-01T23:59:59.000Z

331

Flattening the earth  

Science Journals Connector (OSTI)

...book-review Book Review Flattening the earth J.S Rowlinson * * Corresponding author...HoareThe quest for the true figure of the Earth: ideas and expeditions in four centuries...notion that everything that happened on the Earth and in the Heavens should have a mechanical...

2007-01-01T23:59:59.000Z

332

Earth Systems Science Earth Systems Science at UNH  

E-Print Network (OSTI)

Earth Systems Science Earth Systems Science at UNH THE UNH Institute for the Study of Earth, Oceans, and Space (EOS) Earth Systems Research Center is dedicated to understanding the Earth as an integrative scientists and students study the Earth's ecosystems, atmosphere, water, and ice using field measurements

Pringle, James "Jamie"

333

UK bridge to rare tongues  

E-Print Network (OSTI)

  THE TELEGRAPH - About Us - Advertise - Feedback - Contact Us     /div> 2 Front Page > Nation > Story UK bridge to rare tongues London, Dec. 12 (PTI): Cambridge University has launched a project to provide public access to languages...

Anon.

2010-12-13T23:59:59.000Z

334

PRESS RELEASE RARE FRUIT CONFERENCE  

E-Print Network (OSTI)

RELEASE RARE FRUIT CONFERENCE July 9 - 13, 2014 Sponsored by the Tropical Fruit & Vegetable Society of the Redland & the Fruit & Spice Park 24801 SW 187th Avenue, Homestead, Florida

Jawitz, James W.

335

A Rare Isolated Trapezoid Fracture  

E-Print Network (OSTI)

wrist in suggested scaphoid fracture. Acta Radiol. 1988;29:Rare isolated trapezoid fracture: a case report. Hand. 2008;suspect and diagnose this fracture. 2,8 REFERENCES 1. Papp

Afifi, Negean; Lu, Jenny J

2011-01-01T23:59:59.000Z

336

ASCE's Aerospace Division Earth and Space Conference  

E-Print Network (OSTI)

@jpl.nasa.gov ABSTRACT Using modular construction equipment and additive manufacturing (3D printing) techniques large-scale 3D printing have been developed and tested in earth-based structures, and suggested for use

337

A Framework for Earth System Model Application Monitoring  

Science Journals Connector (OSTI)

Earth System Model (ESM) is an important tool for the research on global environmental evolution using numerical approach. Here we present a monitoring method for ESM applications based on "Earth System Model Oriented Integrated Developing Environment". ... Keywords: Earth system models, application monitoring, monitoring framework

Ran Yan; Jieqian Wu; Yibo Xie; You Meng; Depei Qian

2013-12-01T23:59:59.000Z

338

The Architecture of the Earth System Modeling Framework  

Science Journals Connector (OSTI)

The Earth System Modeling Framework (ESMF) project aims to develop a standard software platform for Earth system models based on open-software practices. Target applications range from operational numerical weather prediction to climate system change ... Keywords: earth system, modeling, ESMF, NASA

Chris Hill; Cecelia DeLuca; V. Balaji; Max Suarez; Arlindo da Silva

2004-01-01T23:59:59.000Z

339

Earth Power Resources Inc | Open Energy Information  

Open Energy Info (EERE)

Power Resources Inc Power Resources Inc Jump to: navigation, search Name Earth Power Resources Inc Address 2407 S Troost Avenue Place Tulsa, Oklahoma Zip 74114 Sector Geothermal energy Year founded 2000 References Website[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Earth Power Resources Inc is a company based in Tulsa, Oklahoma. Earth Power Resources Inc in Tulsa, OK is a private company categorized under: Electric Companies. Records show it was established in 2000 and incorporated in Oklahoma. References ↑ "Website" Retrieved from "http://en.openei.org/w/index.php?title=Earth_Power_Resources_Inc&oldid=598202" Categories: Utility Companies Organizations Stubs

340

Examining Earth's Ecological Problems  

Science Journals Connector (OSTI)

Examining Earth's Ecological Problems ... In "Earth in the Balance: Ecology and the Human Spirit," Sen. Al Gore (D.-Tenn.) ... However, nearly all of it is a fluffy recapitulation of the doomsday theories of those members of a modern environmentalist group who see nothing but disaster and catastrophe in store for the human race, and perhaps all other forms of life on Earth, unless people change their wicked ways—at once. ...

PHILLIP J. WINGATE

1992-03-09T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Earth Day Redux  

Science Journals Connector (OSTI)

Earth Day Redux ... Thirty years ago this month, as a young reporter at Chemical & Engineering News , I was assigned to write the lead News of the Week story on the very first Earth Day—April 22,1970. ... Here's the lead of that 1970 C&EN story: "Millions of people were expected to participate in protests against their polluted heritage as the much heralded and politically popular environmental movement picked up steam last week and culminated Wednesday in Earth Day. ...

MADELEINE JACOBS

2000-04-24T23:59:59.000Z

342

LANL | Solid Earth Geophysics | EES-17  

NLE Websites -- All DOE Office Websites (Extended Search)

LANL : Earth & Environmental Sciences : Solid Earth Geophysics (EES-17) LANL : Earth & Environmental Sciences : Solid Earth Geophysics (EES-17) Home Publications Collaboration & Links Staff Research Highlights Ground-Based Nuclear Explosion Monitoring Geodynamics & National Security Nonlinear Elasticity Time Reversal Los Alamos Seismic Network Stimulated Porous Fluid Flow Resource Recovery Seismic & Acoustic Imaging Exploration Geophysics Induced Seismicity Volcanoes & Earthquakes Other Research CONTACTS Group Leader Ken Rehfeldt Administrative Contacts Jody Benson Cecilia Gonzales Geophysics (EES-17) The Geophysics Group supports the national security mission of Los Alamos National Laboratory by providing technical expertise to monitor movement of Earth's crust while predicting the effects of these events on the environment. Though our focus is on seismic monitoring, we also apply electric, magnetic, radionuclide, and acoustic technologies to monitor underground explosions, maintain our ability to conduct tests, and develop the Yucca Mountain Project. In addition, we study the nonlinear properties of earth materials, imaging with seismic waves, how seismic waves affect the interaction of porous rocks and fluids, use of seismic waves to characterize underground oil reservoirs, volcanology and volcanic seismicity, advanced computational physics of earth materials, and using drilling technology to study the crust of the earth. These tasks are complemented by our extensive background in both conventional and hot dry rock geothermal energy development and geophysical support of the Nevada Test Site.

343

Lab celebrates Earth Day  

NLE Websites -- All DOE Office Websites (Extended Search)

Lab celebrates Earth Day Community Connections: Your link to news and opportunities from Los Alamos National Laboratory Latest Issue: Dec. 2014 - Jan. 2015 All Issues submit Lab...

344

South Florida Sun-Sentinel.com Venus to cross sun in rare celestial event  

E-Print Network (OSTI)

South Florida Sun-Sentinel.com Venus to cross sun in rare celestial event By Robert Nolin, Sun passage across the face of the sun at twilight Tuesday. It's a sight you'll never see again. Called named for the Roman goddess of love will pass between the Earth and the sun for several hours at sunset

Belogay, Eugene A.

345

Evolution of Life on Earth EVOLUTION OF LIFE ON EARTH  

E-Print Network (OSTI)

Evolution of Life on Earth #12;EVOLUTION OF LIFE ON EARTH #12;Earth ~4.5 billion years ago A bad day .... #12;Old (Archean) Rocks #12;4.4 Billion year old Zircon Earth was temperate and had water 4.4 billion years ago! #12;#12;EVOLUTION OF LIFE ON EARTH #12;Making Organic Molecules : Miller & Urey Famous

Shirley, Yancy

346

Bases and Basic Materials in Industrial and Environmental Chemistry: A Review of Commercial Processes  

Science Journals Connector (OSTI)

Solid bases include basic clays, alkaline-earth oxides, alkali metals containing oxides and zeolites, synthetic hydrotalcites, rare-earth oxides and mixed oxides, impregnated carbons, and supported alkali metals. ... Among the most common is the so-called hot-potassium carbonate (HP) process, which is largely used to recover CO2 and sometimes also H2S from different gases such as syngas in ammonia plants, ethylene oxide facilities, and natural gas cleaning plants. ... (106) To this end, magnesia-based bricks are mostly used, because of their availability, high melting temperature (2825 °C), and moderate reactivity. ...

Guido Busca

2009-06-10T23:59:59.000Z

347

A look at the ocean in the EC-Earth climate model Andreas Sterl Richard Bintanja Laurent Brodeau Emily Gleeson  

E-Print Network (OSTI)

to the special issue on EC-Earth, a global climate and earth system model based on the seasonal forecast system-011-1239-2 #12;phytoplankton) processes are involved. To study such complex interactions, Earth System Models

Haak, Hein

348

carleton.ca Earth Sciences  

E-Print Network (OSTI)

carleton.ca Earth Sciences #12;Earth is our home. It is a dynamic planet, integrating and recording spectrometers or electron microprobes--earth scientists investigate Earth's evolution to help understand future today and for the future is enhanced by the expertise of economic geologists. Knowledge of the Earth

Dawson, Jeff W.

349

Geo-neutrinos and Earth Models  

E-Print Network (OSTI)

We present the current status of geo-neutrino measurements and their implications for radiogenic heating in the mantle. Earth models predict different levels of radiogenic heating and, therefore, different geo-neutrino fluxes from the mantle. Seismic tomography reveals features in the deep mantle possibly correlated with radiogenic heating and causing spatial variations in the mantle geo-neutrino flux at the Earth surface. An ocean-based observatory offers the greatest sensitivity to the mantle flux and potential for resolving Earth models and mantle features. Refinements to estimates of the geo-neutrino flux from continental crust reduce uncertainty in measurements of the mantle flux, especially measurements from land-based observatories. These refinements enable the resolution of Earth models using the combined measurements from multiple continental observatories.

Dye, S T; Lekic, V; McDonough, W F; Sramek, O

2014-01-01T23:59:59.000Z

350

Cool Earth Solar  

ScienceCinema (OSTI)

In a public-private partnership that takes full advantage of the Livermore Valley Open Campus (LVOC) for the first time, Sandia National Laboratories and Cool Earth Solar have signed an agreement that could make solar energy more affordable and accessible. In this piece, representatives from Sandia, Cool Earth Solar, and leaders in California government all discuss the unique partnership and its expected impact.

Lamkin, Rob; McIlroy, Andy; Swalwell, Eric; Rajan, Kish

2014-02-26T23:59:59.000Z

351

Earth Day 2010: Earth Day 40th Anniversary Poster  

E-Print Network (OSTI)

EGJ Issue 30 Earth Day 2010 ISSN 1076-7975 In celebration of 40 Earth Day the Electronic GreenEconomics, Poznan, Poland. Earth image used from www.sxc.hu.

Nowacka, Izabela

2010-01-01T23:59:59.000Z

352

Final Report "Structure of Rare Isotopes"  

SciTech Connect

The Junior Investigator grant 'Structure of Rare Isotopes' (DE-FG02-07ER41529) supported research in low-energy nuclear theory from September 1, 2007 to August 31, 2010. It was the main goal of the proposed research to develop and optimize an occupation-number-based energy functional for the computation of nuclear masses, and this aim has been reached. Furthermore, progress was made in linking two and three-body forces from low-momentum interactions to pairing properties in nuclear density functionals, and in the description of deformed nuclei within an effective theory.

Papenbrock, Thomas

2012-05-09T23:59:59.000Z

353

Earth, Space Sciences  

NLE Websites -- All DOE Office Websites (Extended Search)

Earth, Space Sciences Earth, Space Sciences /science-innovation/_assets/images/icon-science.jpg Earth, Space Sciences National security depends on science and technology. The United States relies on Los Alamos National Laboratory for the best of both. No place on Earth pursues a broader array of world-class scientific endeavors. Climate, Ocean and Sea Ice Modeling (COSIM)» Earth A team of scientists is working to understand how local changes in hydrology might bring about major changes to the Arctic landscape, including the possibility of a large-scale carbon release from thawing permafrost. Bryan Travis, an expert in fluid dynamics, is author of the Mars global hydrology numerical computer model, or MAGHNUM, used for calculating heat and fluid transport phenomena. (MAGHNUM was previously

354

Earth's Core Hottest Layer  

NLE Websites -- All DOE Office Websites (Extended Search)

Earth's Core Hottest Layer Earth's Core Hottest Layer Name: Alfred Status: Grade: 6-8 Location: FL Country: USA Date: Spring 2011 Question: Why is the inner core the hottest layer? How is that possible? Replies: There are two factors causing the center of the Earth hotter than various layers of the Earth's. First, the more dense is the layer. The denser layer, the hotter it will be. In addition, the source of the heating is due to heat produced by nuclear decay. These substances tend to be more dense than lower dense substances. So the source of heat (temperature) is higher, the greater will be the temperature. Having said all that, the reasons are rather more complicated in the "real" Earth. If the inner layers were less dense they would rise (bubble) to the "surface" leaving the inner layers more dense and thus hotter layers.

355

Earth & Environmental Science  

NLE Websites -- All DOE Office Websites (Extended Search)

Earth & Environmental Science Earth & Environmental Science Earth & Environmental Science1354608000000Earth & Environmental ScienceSome of these resources are LANL-only and will require Remote Access./No/Questions? 667-5809library@lanl.gov Earth & Environmental Science Some of these resources are LANL-only and will require Remote Access. Key Resources Reference Data Sources Organizations Journals Key Resources AGRICOLA The catalog and index to the collections of the National Agricultural Library, as well as a primary public source for world-wide access to agricultural information. BioOne A global, not-for-profit collaboration bringing together scientific societies, publishers, and libraries to provide access to critical, peer-reviewed research in the biological, ecological, and environmental

356

Fact Sheet: Facility For Rare Isotope Beams (FRIB) Applicant Selection |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Facility For Rare Isotope Beams (FRIB) Applicant Facility For Rare Isotope Beams (FRIB) Applicant Selection Fact Sheet: Facility For Rare Isotope Beams (FRIB) Applicant Selection December 11, 2008 - 8:51am Addthis Based on the analyses and recommendations over the last decade, the U.S. Department of Energy (DOE) Office of Science determined that the establishment of a Facility for Rare Isotope Beams (FRIB) is a high priority for the future of U.S. nuclear science research. This determination and supporting rationale are reflected in the DOE/ National Science Foundation Nuclear Science Advisory Committee's 2007 Long Range Plan and the 2003 DOE report, "Facilities for the Future of Science: A Twenty-Year Outlook." A Funding Opportunity Announcement (FOA) was used to solicit applications for the conceptual design and establishment of FRIB in order

357

Celebrate Earth Day with ACS  

Science Journals Connector (OSTI)

Celebrate Earth Day with ACS ... Winners of the ACS-sponsored Earth Day 2004 music video contest are reported. ... ACS resources for celebrating the Earth Day 2005 theme, "Air—Here, There, Everywhere", are discussed. ...

Erica K. Jacobsen

2005-03-01T23:59:59.000Z

358

Nature: Earth's Atmosphere and Beyond  

Science Journals Connector (OSTI)

Nature: Earth's Atmosphere and Beyond ... The column summarizes research articles from Nature that report on anthropogenic activities and natural phenomena that influence the chemical composition of Earth's atmosphere. ...

Sabine Heinhorst; Gordon Cannon

2003-10-01T23:59:59.000Z

359

Earth Sciences | More Science | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

fully coupled, and intermodel comparison are underway. Moving forward, Earth system models that imbed a stochastic representation of variable Earth system behavior such...

360

Life on Earth. II The Hadean Earth  

E-Print Network (OSTI)

on Earth ·Does not need Oxygen or CO2 ·Does not need to metabolize Carbon ·Does not need Sunlight ·Can Smokers Mid-ocean hydrothermal vents (geysers) ·Temperature >100C (to 400C) ·Spew iron and sulfides for biochemistry ·Hydrothermal vents provide nutrients ·Protected from surface impacts #12;Earliest Life ·May have

Walter, Frederick M.

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

WRI-Earth Trends Data | Open Energy Information  

Open Energy Info (EERE)

WRI-Earth Trends Data WRI-Earth Trends Data Jump to: navigation, search Tool Summary LAUNCH TOOL Name: WRI-Earth Trends Data Agency/Company /Organization: World Resources Institute Sector: Energy Resource Type: Dataset, Maps Website: www.wri.org/project/earthtrends WRI-Earth Trends Data Screenshot References: Earth Trends Data[1] About "Based on the World Resources series, EarthTrends is a free on-line resource that highlights the environmental, social, and economic trends that shape our world. The site offers the public a comprehensive collection of vital statistics, maps, and graphics for more than 200 countries. Much of the environmental information on the internet is fragmented, buried, or only available at a price. EarthTrends gathers data from more than 40 of the world's leading statistical agencies, along with

362

Earth-Abundant Materials  

Energy.gov (U.S. Department of Energy (DOE))

DOE funds research into Earth-abundant materials for thin-film solar applications in response to the issue of materials scarcity surrounding other photovoltaic (PV) technologies. Below are a list...

363

Earth's Global Energy Budget  

Science Journals Connector (OSTI)

An update is provided on the Earth's global annual mean energy budget in the light of new observations and analyses. In 1997, Kiehl and Trenberth provided a review of past estimates and performed a number of radiative computations to better ...

Kevin E. Trenberth; John T. Fasullo; Jeffrey Kiehl

2009-03-01T23:59:59.000Z

364

LANL Studies Earth's Magnetosphere  

ScienceCinema (OSTI)

A new 3-D supercomputer model presents a new theory of how magnetic reconnection works in high-temperature plasmas. This Los Alamos National Laboratory research supports an upcoming NASA mission to study Earth's magnetosphere in greater detail than ever.

Daughton, Bill

2014-08-12T23:59:59.000Z

365

Alexandria Digital Earth ProtoType The Alexandria Digital Earth  

E-Print Network (OSTI)

Alexandria Digital Earth ProtoType The Alexandria Digital Earth Prototype System Terence Smith Greg Janée James Frew Anita Coleman #12;Alexandria Digital Earth ProtoType 2Smith et al. / JCDL 2001 / 2x Earth ProtoType 3Smith et al. / JCDL 2001 / 2x-Jun-2001 Core System (inherited from ADL) Components

Janée, Greg

366

Physical Earth Science Is Physical Earth Science right for me?  

E-Print Network (OSTI)

Physical Earth Science Is Physical Earth Science right for me? If you are interested in learning a Physical Earth Science degree. The skills you will gain are wide-ranging and will provide a good basis for employment in almost any sector. Are all Physical Earth Science degrees the same? Universities do not have

Harman, Neal.A.

367

The Sun-Earth Connection The Temperature of the Earth  

E-Print Network (OSTI)

AST248 The Sun-Earth Connection #12;The Temperature of the Earth The Earth is in equilibrium with the Sun - on average it is neither heating nor cooling. The equilibrium temperature is set by equating ­ the heat absorbed from the Sun with ­ the heat radiated by the Earth. Heat in = heat out #12;Heat

Walter, Frederick M.

368

An Equilibrium Model of Rare Event Premia  

E-Print Network (OSTI)

In this paper, we study the asset pricing implication of imprecise knowledge about rare events. Modeling rare events as jumps in the aggregate endowment, we explicitly solve the equilibrium asset prices in a pure-exchange ...

Liu, Jun

2002-08-12T23:59:59.000Z

369

Rare Iron Oxide in Ancient Chinese Pottery  

NLE Websites -- All DOE Office Websites (Extended Search)

Rare Iron Oxide in Ancient Chinese Pottery Rare Iron Oxide in Ancient Chinese Pottery Print Friday, 26 September 2014 14:37 Jian ware (or Tenmoku) ceramic bowls, famous for their...

370

Charge Compensation in RE3+ (RE = Eu, Gd) and M+ (M = Li, Na, K) Co-Doped Alkaline Earth Nanofluorides Obtained by Microwave Reaction with Reactive Ionic Liquids Leading to Improved Optical Properties  

SciTech Connect

Alkaline earth fluorides are extraordinarily promising host matrices for phosphor materials with regard to rare earth doping. In particular, quantum cutting materials, which might considerably enhance the efficiency of mercury-free fluorescent lamps or SC solar cells, are often based on rare earth containing crystalline fluorides such as NaGdF4, GdF3 or LaF3. Substituting most of the precious rare earth ions and simultaneously retaining the efficiency of the phosphor is a major goal. Alkaline earth fluoride nanoparticles doped with trivalent lanthanide ions (which are required for the quantum cutting phenomenon) were prepared via a microwave assisted method in ionic liquids. As doping trivalent ions into a host with divalent cations requires charge compensation, this effect was thoroughly studied by powder X-ray and electron diffraction, luminescence spectroscopy and 23Na, 139La and 19F solid state NMR spectroscopy. Monovalent alkali ions were codoped with the trivalent lanthanide ions to relieve stress and achieve a better crystallinity and higher quantum cutting abilities of the prepared material. 19F-magic angle spinning (MAS)-NMR-spectra, assisted by 19F{23Na} rotational echo double resonance (REDOR) studies, reveal distinct local fluoride environments, the populations of which are discussed in relation to spatial distribution and clustering models. In the co-doped samples, fluoride species having both Na+ and La3+ ions within their coordination sphere can be identified and quantified. This interplay of mono- and trivalent ions in the CaF2 lattice appears to be an efficient charge compensation mechanism that allows for improved performance characteristics of such co-doped phosphor materials.

Lorbeer, C [Ruhr-Universitat Bochum; Behrends, F [Westfalische Wilhelsm-Universitat Munster; Cybinska, J [Ruhr Universitat Bochum; Eckert, H [Westfalische Wilhelsm-Universitat Munster; Mudring, Anja -V [Ames Laboratory

2014-01-01T23:59:59.000Z

371

The Earth and the IGY  

Science Journals Connector (OSTI)

The Earth and the IGY ... "The Earth and Its Atmosphere" will bring you up to date in all the main branches of these related studies: the earth's crust and interior; the circulation of the oceans; meteorology and the composition and structure of the atmosphere; atoms and magnetic storms, and the origin, age, and ultimate fate of the earth. ...

1958-10-27T23:59:59.000Z

372

Earth Day 2014 | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Earth Day 2014 Earth Day 2014 Earth Day 2014 This year, we're celebrating Earth Day all week long. It's Earth Week on Energy.gov We're focusing on climate change, highlighting...

373

On the Planetary acceleration and the Rotation of the Earth  

E-Print Network (OSTI)

We have developed a model for the Earth rotation that gives a good account (data) of the Earth astronomical parameters. These data can be compared with the ones obtained using space-base telescopes. The expansion of the universe has an impact on the rotation of planets, and in particular, the Earth. The expansion of the universe causes an acceleration that is exhibited by all planets.

Arbab I. Arbab

2007-08-06T23:59:59.000Z

374

The Colorado Rare Plant Technical Committee presents: Colorado Rare Plant Symposium  

E-Print Network (OSTI)

The Colorado Rare Plant Technical Committee presents: 5th Annual Colorado Rare Plant Symposium September 5, 2008 Montrose, Colorado Sponsored by: Colorado Rare Plant Technical CommitteeColorado Rare Plant Technical Committee Colorado Native Plant Society University of Colorado Herbarium US Fish

375

The Colorado Rare Plant Technical Committee presents: 2nd Annual Rare Plant  

E-Print Network (OSTI)

The Colorado Rare Plant Technical Committee presents: 2nd Annual Rare Plant Symposium Friday, September 16th, 2005 8am-noon: 2nd Annual Colorado Rare Plant Symposium (Discuss G1 species) 6:30-7:30pm with the Colorado Native Plant Society's Annual Meeting Sponsored by: #12;The Second Annual Colorado Rare Plant

376

Modeling the earth system  

SciTech Connect

The 1990 Global Change Institute (GCI) on Earth System Modeling is the third of a series organized by the Office for Interdisciplinary Earth Studies to look in depth at particular issues critical to developing a better understanding of the earth system. The 1990 GCI on Earth System Modeling was organized around three themes: defining critical gaps in the knowledge of the earth system, developing simplified working models, and validating comprehensive system models. This book is divided into three sections that reflect these themes. Each section begins with a set of background papers offering a brief tutorial on the subject, followed by working group reports developed during the institute. These reports summarize the joint ideas and recommendations of the participants and bring to bear the interdisciplinary perspective that imbued the institute. Since the conclusion of the 1990 Global Change Institute, research programs, nationally and internationally, have moved forward to implement a number of the recommendations made at the institute, and many of the participants have maintained collegial interactions to develop research projects addressing the needs identified during the two weeks in Snowmass.

Ojima, D. [ed.

1992-12-31T23:59:59.000Z

377

HYDROLOGY AND GEOMORPHOLOGY OF A RARE FLOOD, BLACKBURN FORK,  

E-Print Network (OSTI)

-prediction. � Discharge measurements based on boulder size appear to give more reasonable estimates of flood dischargeHYDROLOGY AND GEOMORPHOLOGY OF A RARE FLOOD, BLACKBURN FORK, PUTNAM-JACKSON COUNTIES 18 AUGUST 2010) #12;Source: NOAA 17-18 Aug 2010 #12;#12;FLOOD DAMAGE #12;#12;#12;#12;#12;#12;#12;#12;#12;4 bridges

Hart, Evan

378

Lab celebrates Earth Day  

NLE Websites -- All DOE Office Websites (Extended Search)

Lab celebrates Earth Day Lab celebrates Earth Day Community Connections: Our link to Northern New Mexico Communities Latest Issue:Dec. 2013 - Jan. 2014 All Issues » submit Lab celebrates Earth Day Multiple activities focus on environmental protection. May 1, 2013 A team from Industrial Hygiene and Safety during the Great Garbage Grab A team from Industrial Hygiene and Safety during the Great Garbage Grab. Contact Editor Linda Anderman Email Community Programs Office Kurt Steinhaus Email Great Garbage Grab From April 1 - 12 employees were encouraged to don work gloves and very attractive orange vests to pick up litter around their workplace-both on and off Lab property. This year's winner of the coveted Traveling Trash Trophy (for picking up the most litter) went to the Worker Safety and

379

Manganese-Aluminum-Based Magnets: Nanocrystalline t-MnAI Permanent Magnets  

SciTech Connect

REACT Project: Dartmouth is developing specialized alloys with magnetic properties superior to the rare earths used in today’s best magnets. EVs and renewable power generators typically use rare earths to turn the axles in their electric motors due to the magnetic strength of these minerals. However, rare earths are difficult and expensive to refine. Dartmouth will swap rare earths for a manganese-aluminum alloy that could demonstrate better performance and cost significantly less. The ultimate goal of this project is to develop an easily scalable process that enables the widespread use of low-cost and abundant materials for the magnets used in EVs and renewable power generators.

None

2012-01-01T23:59:59.000Z

380

Empirical Earth rotation model: a consistent way to evaluate Earth orientation parameters  

E-Print Network (OSTI)

It is customary to perform analysis of the Earth's rotation in two steps: first, to present results of estimation of the Earth orientation parameters in the form of time series based on a simplified model of variations of the Earth's rotation for a short period of time, and then to process this time series of adjustments by applying smoothing, re-sampling and other numerical algorithms. Although this approach saves computational time, it suffers from self-inconsistency: total Earth orientation parameters depend on a subjective choice of the apriori Earth orientation model, cross-correlations between points of time series are lost, and results of an operational analysis per se have a limited use for end users. An alternative approach of direct estimation of the coefficients of expansion of Euler angle perturbations into basis functions is developed. These coefficients describe the Earth's rotation over entire period of observations and are evaluated simultaneously with station positions, source coordinates and other parameters in a single LSQ solution. In the framework of this approach considerably larger errors in apriori EOP model are tolerated. This approach gives a significant conceptual simplification of representation of the Earth's rotation.

L. Petrov

2006-11-26T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Chapter 4 - Recycling Rare Metals  

Science Journals Connector (OSTI)

Abstract The industrial system now utilizes many more elements, especially rare metals, than was the case even a half century ago. Most are not mined for themselves but are obtained as by-products or “hitchhikers” of the more familiar industrial metals, such as iron, aluminum, copper, nickel, and zinc. This imposes a limit on the production of by-product metals. But in some cases, demand may increase much faster than new supply. This suggests a need for recycling. But the uses of these metals are often in products, such as cell phones, that are mass-produced but where the amount in each individual product is very small. Some uses are also inherently dissipative. This makes recycling very difficult in principle. It constitutes a serious challenge for the future economy. Prices will rise.

Robert U. Ayres; Gara Villalba Méndez; Laura Talens Peiró

2014-01-01T23:59:59.000Z

382

Fact Sheet: Facility for Rare Isotope Beams (FRIB) Applicant Selection |  

Office of Science (SC) Website

Fact Sheet: Fact Sheet: Facility for Rare Isotope Beams (FRIB) Applicant Selection News Featured Articles Science Headlines 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 12.11.08 Fact Sheet: Facility for Rare Isotope Beams (FRIB) Applicant Selection Print Text Size: A A A Subscribe FeedbackShare Page Based on the analyses and recommendations over the last decade, the U.S. Department of Energy (DOE) Office of Science determined that the establishment of a Facility for Rare Isotope Beams (FRIB) is a high priority for the future of U.S. nuclear science research. This determination and supporting rationale are reflected in the DOE/ National

383

Multivariate synthetic streamflow generation using a hybrid model based on artificial neural networks Hydrology and Earth System Sciences, 6(4), 641654 (2002) EGS  

E-Print Network (OSTI)

streamflow generation using a hybrid model based on artificial neural networks J.C. Ochoa-Rivera, R. GarcíaMultivariate synthetic streamflow generation using a hybrid model based on artificial neural neural network. The structure of the model results from two components, the neural network (NN

Paris-Sud XI, Université de

384

Earth Democracy: Justice, Sustainability, and Peace  

E-Print Network (OSTI)

Review: Earth Democracy: Justice, Sustainability, and PeaceUniversity, USA Vandana Shiva. Earth Democracy: Justice,Acid-free, recycled paper. Earth Democracy is a movement

Anderson, Byron

2006-01-01T23:59:59.000Z

385

Green Earth Fuels | Open Energy Information  

Open Energy Info (EERE)

Earth Fuels Earth Fuels Jump to: navigation, search Name Green Earth Fuels Place Houston, Texas Zip 77057 Product A producer and distributor of soy and palm based biodiesel Coordinates 29.76045°, -95.369784° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":29.76045,"lon":-95.369784,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

386

EarthTronics Inc | Open Energy Information  

Open Energy Info (EERE)

EarthTronics Inc EarthTronics Inc Jump to: navigation, search Name EarthTronics Inc. Place Muskegon, Michigan Zip 49440 Product Michigan-based firm that has licensed the Honeywell International brand for its gearless micro-scale turbines. Coordinates 43.23424°, -86.245929° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.23424,"lon":-86.245929,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

387

Chapter 32: Beyond the earth  

E-Print Network (OSTI)

1 Chapter 32: Beyond the earth Did you read chapter 32 before coming to class? A. Yes B the planets. We began our study of the history of the solar system by studying the history of the earth decreased. How about the rest of the solar system? Some stats on the Sun Time for light to reach Earth · 8

Hart, Gus

388

Happy B-Earth Day  

Science Journals Connector (OSTI)

Happy B-Earth Day ... n April 22, 1970, the U.S. celebrated its first Earth Day. ... Internationally, the Vernal Equinox (often March 20) had been recognized for Earth Day starting in 1969, and the U.N. made official that recognition in 1971. ...

Darcy J. Gentleman

2010-03-30T23:59:59.000Z

389

Earth Day Illustrated Haiku Contest  

Science Journals Connector (OSTI)

Earth Day Illustrated Haiku Contest ... Chemists Celebrate Earth Day: "Recycling—Chemistry Can! ... As part of their 2007 Chemists Celebrate Earth Day Celebration, the American Chemical Society is sponsoring an illustrated haiku contest for students in grades K–12 around the theme, Recycling—Chemistry Can! ...

JCE staff

2007-02-01T23:59:59.000Z

390

Rare is frequent and frequent is costly: rare diseases as a challenge for health care systems  

Science Journals Connector (OSTI)

Of 30,000 known diseases about 6,000–7,000 are defined as rare diseases, also commonly known as orphan diseases [1]. Within the European Union (EU), rare diseases are specified as indications with a prevalence of...

J.-Matthias Graf von der Schulenburg…

2014-10-01T23:59:59.000Z

391

Man on Earth  

NLE Websites -- All DOE Office Websites (Extended Search)

Man on Earth Man on Earth Name: jmagee Status: N/A Age: N/A Location: N/A Country: N/A Date: Around 1993 Question: How long has man as a species existed on the planet? Replies: Human evolution is a matter of considerable debate. Since the phrase in the question, "man as a species," is a bit vague, here is a brief run-down of the fossil evidence for the evolution of hominids (animals able to walk upright): Australopithecus - the first hominid, appeared on the African savannas 2-3 million years ago. Brain size was 1/3 modern human's. Homo habilis - the first hominid to make and use tools. Homo erectus - a. k. a. Peking and Java man, evolved from Homo habilis about 1.5 million years ago, built fires, resided in huts, and had a brain capacity of 1,000 ml (versus modern man's 1,375 ml).

392

Understanding Earth's Energy Sources  

K-12 Energy Lesson Plans and Activities Web site (EERE)

In Part 1, students will know how fossil fuels were formed; recognize common uses of Earth’s fossil energy resources and develop an understanding of the risks and benefits of their continued use. In Part 2, students focus on the importance of renewable energy resources for a sustainable future. Current renewable energy technologies (solar, wind, biomass, hydrogen, hydroelectric, and geothermal) are discussed. Information on solar is located on a separate power point (2006 Solar PP) as is hydrogen and transportation alternatives. Students will be able to distinguish between renewable and nonrenewable energy resources and identify the positive and negative effects of each. The long-term understanding of this unit is for the students to make informed energy decisions in the future.

393

Earth's Decelerating Tectonic Plates  

SciTech Connect

Space geodetic and oceanic magnetic anomaly constraints on tectonic plate motions are employed to determine a new global map of present-day rates of change of plate velocities. This map shows that Earth's largest plate, the Pacific, is presently decelerating along with several other plates in the Pacific and Indo-Atlantic hemispheres. These plate decelerations contribute to an overall, globally averaged slowdown in tectonic plate speeds. The map of plate decelerations provides new and unique constraints on the dynamics of time-dependent convection in Earth's mantle. We employ a recently developed convection model constrained by seismic, geodynamic and mineral physics data to show that time-dependent changes in mantle buoyancy forces can explain the deceleration of the major plates in the Pacific and Indo-Atlantic hemispheres.

Forte, A M; Moucha, R; Rowley, D B; Quere, S; Mitrovica, J X; Simmons, N A; Grand, S P

2008-08-22T23:59:59.000Z

394

LamontDoherty Earth Observatory The Earth Institute at Columbia UniversityThe Earth Institute at Columbia Univ  

E-Print Network (OSTI)

12 12 Lamont­Doherty Earth Observatory The Earth Institute at Columbia UniversityThe Earth-DOHERTYEARTHOBSERVATORYTHEEARTHINSTITUTEATCOLUMBIAUNIVERSITYBIENNIALREPORT2000­2002 #12;Lamont-Doherty Earth Observatory is renowned in the internationLamont-Doherty Earth suc- cess and innovation in advancing understanding of Earth, for itcess and innovation in advancing

395

Superhydrophobic diatomaceous earth  

DOE Patents (OSTI)

A superhydrophobic powder is prepared by coating diatomaceous earth (DE) with a hydrophobic coating on the particle surface such that the coating conforms to the topography of the DE particles. The hydrophobic coating can be a self assembly monolayer of a perfluorinated silane coupling agent. The DE is preferably natural-grade DE where organic impurities have been removed. The superhydrophobic powder can be applied as a suspension in a binder solution to a substrate to produce a superhydrophobic surface on the substrate.

Simpson, John T. (Clinton, TN); D'Urso, Brian R. (Clinton, TN)

2012-07-10T23:59:59.000Z

396

Earth System History Announcements  

E-Print Network (OSTI)

of atoms in them. Something like 10 parts-per-million of Uranium in granite = 6.83 x 1027 atoms of Uranium radioactivity in it #12;3 cm A simple piece of granite has atoms of Uranium, Thorium and Potassium N D D D D D #12;Deep time is a central concept in Geology and in our understanding of how the Earth

Mojzsis, Stephen J.

397

Mining the earth  

SciTech Connect

Substances extracted from the earth - stone, iron, bronze - have been so critical to human development that historians name the ages of our past after them. But while scholars have carefully tracked human use of minerals, they have never accounted for the vast environmental damage incurred in mineral production. Few people would guess that a copper mining operation has removed a piece of Utah seven times the weight of all the material dug for the Panama Canal. Few would dream that mines and smelters take up to a tenth of all the energy used each year, or that the waste left by mining measures in the billions of tons - dwarfing the world's total accumulation of more familiar kinds of waste, such as municipal garbage. Indeed, more material is now stripped from the earth by mining than by all the natural erosion of the earth's rivers. The effects of mining operations on the environment are discussed under the following topics: minerals in the global economy, laying waste, at what cost cleaning up, and dipping out. It is concluded that in the long run, the most effective strategy for minimizing new damage is not merely to make mineral extraction cleaner, but to reduce the rich nations needs for virgin (non-recycled) minerals.

Young, J.E.

1992-01-01T23:59:59.000Z

398

Earth Sciences | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Biogeochemistry Multiscale Energy Science Future Technology Knowledge Discovery Materials Mathematics National Security Systems Modeling Engineering Analysis Behavioral Sciences Geographic Information Science and Technology Quantum Information Science Supercomputing and Computation Home | Science & Discovery | Supercomputing and Computation | Research Areas | Earth Sciences SHARE Earth Sciences Computational Earth Sciences research at ORNL encompasses many important aspects of global and regional Earth system model development and analysis. We focus on numerical methods development and implementation, data analytics, verification and validation of Earth system components, and the development of methods to characterize stochastic behavior. Significant progress is underway in the areas of scalable time stepping algorithms,

399

The Colorado Rare Plant Technical Committee presents  

E-Print Network (OSTI)

The Colorado Rare Plant Technical Committee presents: 3rd Annual Rare Plant Symposium Sponsored by: Colorado Native Plant Society University of Colorado Herbarium US Fish and Wildlife Service Colorado and Eastern Colorado (Las Animas, Weld, Kit Carson, Huerfano, Pueblo, Otero, Prowers, Fremont, and El Paso

400

Stark spectroscopy on rare gas atoms  

E-Print Network (OSTI)

Stark spectroscopy on rare gas atoms PROEFSCHRIFT ter verkrijging van de graad van doctor aan de-DATA LIBRARY TECHNISCHE UNIVERSITEIT EINDHOVEN Jiang, Tao Stark spectroscopy on rare gas atoms / by Tao Jiang / gasontladingen Subject headings : plasma diagnostics / Stark effect / optogalvanic spectroscopy / atomic emission

Eindhoven, Technische Universiteit

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Chemical Properties of the Rare Gases  

Science Journals Connector (OSTI)

... of argon of about 100 atm. I have already shown by an independent method1 that radon, too, forms a hydrate which is much more stable than those of other rare ... , forms a hydrate which is much more stable than those of other rare gases. Radon is easily held by crystals of sulphur dioxide hydrates, when they are formed from ...

B. A. NIKITIN

1937-10-09T23:59:59.000Z

402

4/22/11 10:54 AMEarth Day: Environmental education has failed. But we can fix it. -CSMonitor.com Page 1 of 3http://www.csmonitor.com/Commentary/Opinion/2011/0422/Earth-Day-Environmental-education-has-failed.-But-we-can-fix-it#comments  

E-Print Network (OSTI)

the Earth for fossil fuels and rare earth elements, pumped more and more CO2 into the atmosphere.com Page 1 of 3http://www.csmonitor.com/Commentary/Opinion/2011/0422/Earth-Day-Environmental-education-has-failed.-But-we-can-fix-it#comments Try a FREE 30 day preview of Daily News Briefing Gallery: Earth Day 2011 Related Stories Happy Earth

403

Earth System Science for Global Sustainability: Grand Challenges  

Science Journals Connector (OSTI)

...hydrological systems on seasonal to decadal time scales. Most current efforts to build state-of-the-art whole-Earth system models depart from sophisticated geophysical kernels (coupled atmosphere-ocean models based on exact dynamical equations...

W. V. Reid; D. Chen; L. Goldfarb; H. Hackmann; Y. T. Lee; K. Mokhele; E. Ostrom; K. Raivio; J. Rockström; H. J. Schellnhuber; A. Whyte

2010-11-12T23:59:59.000Z

404

Earth is a dynamic, living oasis in the desolation of space. The land, oceans, and air interact in complex ways to give our planet a unique set  

E-Print Network (OSTI)

Earth is a dynamic, living oasis in the desolation of space. The land, oceans, and air interact in this process. In the mid 1980s, NASA developed a systems-based approach to studying the Earth and called it "Earth System Science" to advance the knowledge of Earth as a planet. Space-based observations

405

Earth's extensive entropy bound  

E-Print Network (OSTI)

The possibility of planetary mass black hole production by crossing entropy limits is addressed. Such a possibility is given by pointing out that two geophysical quantities have comparable values: first, Earth's total negative entropy flux integrated over geological time and, second, its extensive entropy bound, which follows as a tighter bound to the Bekenstein limit when entropy is an extensive function. The similarity between both numbers suggests that the formation of black holes from planets may be possible through a strong fluctuation toward thermodynamic equilibrium which results in gravothermal instability and final collapse. Briefly discussed are implications for the astronomical observation of low mass black holes and for Fermi's paradox.

A. M. Lisewski

2012-12-20T23:59:59.000Z

406

A Star on Earth  

ScienceCinema (OSTI)

At the Energy Department's Princeton Plasma Physics Lab, scientists are trying to accomplish what was once considered the realm of science fiction: create a star on Earth. The National Spherical Torus Experiment (NSTX) is a magnetic fusion device that is used to study the physics principles of spherically shaped plasmas -- hot ionized gases in which, under the right conditions, nuclear fusion will occur. Fusion is the energy source of the sun and all of the stars. Not just limited to theoretical work, the NSTX is enabling cutting-edge research to develop fusion as a future energy source.

Prager, Stewart; Zwicker, Andrew; Hammet, Greg; Tresemer, Kelsey; Diallo, Ahmed

2014-06-06T23:59:59.000Z

407

A Star on Earth  

SciTech Connect

At the Energy Department's Princeton Plasma Physics Lab, scientists are trying to accomplish what was once considered the realm of science fiction: create a star on Earth. The National Spherical Torus Experiment (NSTX) is a magnetic fusion device that is used to study the physics principles of spherically shaped plasmas -- hot ionized gases in which, under the right conditions, nuclear fusion will occur. Fusion is the energy source of the sun and all of the stars. Not just limited to theoretical work, the NSTX is enabling cutting-edge research to develop fusion as a future energy source.

Prager, Stewart; Zwicker, Andrew; Hammet, Greg; Tresemer, Kelsey; Diallo, Ahmed

2014-03-05T23:59:59.000Z

408

Emission intensity in the visible and IR spectral ranges from Si-based structures formed by direct bonding with simultaneous doping with erbium (Er) and europium (Eu)  

SciTech Connect

The photo- and electroluminescence spectra of silicon-based structures formed by direct bonding with simultaneous doping with rare-earth metals are studied. It is shown that emission in the visible and IR spectral ranges can be obtained from n-Si:Er/p-Si and n-Si:Eu/p-Si structures fabricated by the method suggested in the study. The results obtained make this method promising for the fabrication of optoelectronic devices.

Mezdrogina, M. M., E-mail: margaret.m@mail.ioffe.ru; Kostina, L. S.; Beliakova, E. I.; Kuzmin, R. V. [Russian Academy of Sciences, Ioffe Physical-Technical Institute (Russian Federation)] [Russian Academy of Sciences, Ioffe Physical-Technical Institute (Russian Federation)

2013-09-15T23:59:59.000Z

409

WHERE TO FIND HABITABLE ''EARTHS'' IN CIRCUMBINARY SYSTEMS  

SciTech Connect

Six P-type planets have been found thus far around five binary systems, i.e., Kepler-16b, 34b, 35b, 38b, and 47b and c, which are all Neptune- or Jupiter-like planets. The stability of planets and the habitable zones are influenced by the gravitational and radiative perturbations of binary companions. In this Letter, we check the stability of an additional habitable Earth-mass planet in each system. Based on our simulations in 10 Myr, a habitable ''Earth'' is hardly stable in Kepler-16, while a stable ''Earth'' in Kepler-47 close to the boundaries of the habitable zone is possible. In contrast, Kepler-34, 35, and 38 seem to have high probabilities of being able to tolerante a stable ''Earth'' in their habitable zones. The affects of transit time variations are quite small due to the small mass of an undetected ''Earth,'' except that of Kepler-16b. With a time precision of 10{sup -3} day ({approx}88 s), an ''Earth'' in the corotational resonance with Kepler-16b can be detected in three years, while habitable ''Earths'' in the Kepler-34 and 38 systems can be detected in 10 yr. Habitable ''Earths'' in Kepler-35 and 47 are not likely to be detected in 10 yr under this precision.

Liu Huigen; Zhang Hui; Zhou Jilin, E-mail: huigen@nju.edu.cn [School of Astronomy and Space Science and Key Laboratory of Modern Astronomy and Astrophysics in Ministry of Education, Nanjing University, Nanjing 210093 (China)

2013-04-20T23:59:59.000Z

410

Probing QCD with Rare Charmless $B$ Decays  

SciTech Connect

Rare charmless hadronic B decays are a good testing ground for QCD. In this paper we describe a selection of new measurements made by the BABAR and BELLE collaborations.

Gradl, Wolfgang

2006-07-07T23:59:59.000Z

411

Nuclear Astrophysics in Rare Isotope Facilities  

E-Print Network (OSTI)

Nuclear reactions in stars are difficult to measure directly in the laboratory at the small astrophysical energies. In recent years indirect methods with rare isotopes have been developed and applied to extract low-energy astrophysical cross sections.

C. A. Bertulani

2009-11-02T23:59:59.000Z

412

THE INTERACTION OF RARE GAS METASTABLE ATOMS  

E-Print Network (OSTI)

in the study of metastable atom reactions. > 1 it- Fig, laa raetastable rare gas atom, three quantities are necessaryOF iiARE GAS METASTABLF ATOMS Andrew Zun-Foh Wang M a t e r

Wang, A.Z.-F.

2011-01-01T23:59:59.000Z

413

Rare decays at the LHCb experiment  

E-Print Network (OSTI)

Rare decays of beauty and charm hadrons offer a rich playground to make precise tests of the Standard Model and look for New Physics at the level of quantum corrections. A review of recent LHCb results will be presented.

Luca Pescatore

2014-10-09T23:59:59.000Z

414

Fundamental and Magnetic-Hardening Studies of Rare-Earth and Nanocomposite Magnets  

SciTech Connect

In this project we study new nanocrystalline and nanocomposite structures that have high potential for permanent-magnet development. These materials, which can be synthesized to have either very high or intermediate coercivities, have many applications in electric power, transportation, and information-storage industries. There is great interest in further development of understanding and application of these materials.

Sellmyer, David J.

2003-12-22T23:59:59.000Z

415

Rare-earth neutral metal injection into an electron beam ion trap plasma  

SciTech Connect

We have designed and implemented a neutral metal vapor injector on the SuperEBIT high-energy electron beam ion trap at the Lawrence Livermore National Laboratory. A horizontally directed vapor of a europium metal is created using a thermal evaporation technique. The metal vapor is then spatially collimated prior to injection into the trap. The source's form and quantity constraints are significantly reduced making plasmas out of metal with vapor pressures ?10{sup ?7} Torr at ?1000?°C more obtainable. A long pulsed or constant feed metal vapor injection method adds new flexibility by varying the timing of injection and rate of material being introduced into the trap.

Magee, E. W., E-mail: magee1@llnl.gov; Beiersdorfer, P.; Brown, G. V. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Hell, N. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Dr. Remeis-Sternwarte and ECAP, Universität Erlangen-Nürnberg, 96049 Bamberg (Germany)

2014-11-15T23:59:59.000Z

416

Rare earth elements as tracers of sediment contamination by phosphogypsum in the Santos estuary, southern Brazil  

Science Journals Connector (OSTI)

In the Cubatão region, southern Brazil, sediments are transported by several rivers from the Serra do Mar Ridge into the Santos estuary. Fertilizer plants have been operating along the margins of one of these rivers (Mogi River) producing a large volume of phosphogypsum, which is stockpiled in nearby areas. Surface sediments of the Mogi River were sampled upstream and downstream in relation to the point where the effluents of the phosphogypsum piles flow into the drainage system. In the vicinity of this point one sediment core was collected. Results show that REE, Ba, Zr and Th concentrations in the non-contaminated sediments are of the same order as those present in the upper continental crust. The contaminated samples present a composition affected by that of the phosphogypsum, marked by a higher concentration of these elements and a stronger degree of REE fractionation. These phosphogypsum characteristics are inherited from the Catalão igneous phosphate ore and were moderately modified by the industrial process of phosphoric acid production. The phosphogypsum signal decreases rapidly downstream, pointing to a limited area of influence of the stacks. The deepest sediments of the core are also free of contamination, representing a time interval prior to the deposition of phosphogypsum wastes on the banks of the estuary.

Sonia Maria Barros de Oliveira; Paulo Sergio Cardoso da Silva; Barbara Paci Mazzilli; Deborah Ines Teixeira Favaro; Catia Heloisa Saueia

2007-01-01T23:59:59.000Z

417

Three-band model for exciton formation in rare-earth compounds  

Science Journals Connector (OSTI)

The possibility of exciton formation is studied in a model which allows for hybridization between a conduction band and a 4f level and which takes into account the scattering of electrons in a band of higher energy on the 4f ion. There is no direct coupling between this latter band and the conduction band. For weak scattering and in the Hartree-Fock approximation an isolated level built up from the 4f and the higher-band states appears. For sufficiently strong scattering this level broadens due to the coupling to the conduction band and becomes partially occupied. The theoretical arguments are supported by numerical calculations.

P. Erdös; J. Sólyom; A. Sütö

1988-11-15T23:59:59.000Z

418

Vehicle Technologies Office Merit Review 2014: Scalable Non-Rare Earth Motor Development  

Energy.gov (U.S. Department of Energy (DOE))

Presentation given by Oak Ridge National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about scalable non...

419

Photoconductivity of chemically deposited rare-earth-doped CdS films  

Science Journals Connector (OSTI)

Highly photosensitive films with photocurrent to dark current ratios of the order of 105 have been prepared by doping CdS with Nd and Pr. The conditions for...

S. Bhushan; Dipti Thakur

1992-03-01T23:59:59.000Z

420

Resonant Inelastic X-ray Scattering of Rare-Earth and Copper Systems  

E-Print Network (OSTI)

100 nm Si 3 N 4 windows 100Å copper films were deposited inthick Si 3 N 4 window, the 100Å Fe film was deposited inis present in the film on the window membrane. Cu 2 O has

Kvashnina, Kristina

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Nuclear-Decay Studies of Neutron-Rich Rare-Earth Nuclides  

E-Print Network (OSTI)

yields from U and C f Chart of nuclides for neutron-richlceVy gales for A=168 Chart of nuclides for region studied A1.2. Region of the chart of nuclides showing the various

Chasteler, R.M.

2010-01-01T23:59:59.000Z

422

Using rare earth elements to constrain particulate organic carbon flux in marginal seas.  

E-Print Network (OSTI)

??Fluxes of particulate organic carbon (POC) in the East China Sea (ECS) have been reported to decrease from the inner continental shelf towards the outer… (more)

Chen, Ya-Feng

2014-01-01T23:59:59.000Z

423

f-f excitations by resonant electron-exchange collisions in rare-earth metals  

Science Journals Connector (OSTI)

The spin-forbidden f-f multiplet excitations are observed for the first time as the strongest features in the electron-energy-loss spectra of Gd, Dy, and Sm metals at low primary-electron energies. The exchange nature of the excitation process is argued, in analogy with that of spin-flip Stoner excitations in d-band ferromagnets. A resonance enhancement observed for primary-electron energies near the 4d-4f core threshold is found to be consistent with the proposed mechanism.

S. Modesti; G. Paolucci; E. Tosatti

1985-12-30T23:59:59.000Z

425

Metal sulfide and rare-earth phosphate nanostructures and methods of making same  

DOE Patents (OSTI)

The present invention provides a method of producing a crystalline metal sulfide nanostructure. The metal is a transitional metal or a Group IV metal. In the method, a porous membrane is placed between a metal precursor solution and a sulfur precursor solution. The metal cations of the metal precursor solution and sulfur ions of the sulfur precursor solution react, thereby producing a crystalline metal sulfide nanostructure.

Wong, Stanislaus; Zhang, Fen

2014-05-13T23:59:59.000Z

426

Rare earth : geomantic formulae for the production of works of art  

E-Print Network (OSTI)

This thesis describes the development of my study of the influence of chinese geomancy on my art. The emphasis is on art forms created for the transportation of my mind to the audience within encompassing space and sculpted ...

Chan-Bernard, Mei-ling

1990-01-01T23:59:59.000Z

427

Measuring Low Dimensional Schottky Barriers of Rare Earth Silicide-Silicon Interfaces.  

E-Print Network (OSTI)

??The focus of this study is the measurement of low dimensional Schottky barrier heights of metal silicide-silicon interfaces and the challenges of current-voltage (I/V) curve… (more)

Vick, Andrew J

2011-01-01T23:59:59.000Z

428

Proximal surface caries detection with direct-exposure and rare earth screen/film imaging  

SciTech Connect

This laboratory study compared five imaging systems for their diagnostic accuracy in detection of proximal surface dental caries. Ten viewers provided data on radiographic detectability of carious lesions. The diagnostic accuracy of each system was determined with receiver operating characteristic (ROC) curves by comparing viewer data with the true state of the teeth as determined microscopically. D-speed film marginally outperformed the other four systems, but the three screen/film systems matched the diagnostic accuracy of E-speed film. Radiation reductions between 62% and 92% were achieved with the screen/film systems when compared to the two conventional dental films. The feasibility of designing a screen/film bite-wing cassette was shown, but the poor diagnostic accuracy of the present bite-wing system indicated a need for a new technology in caries detection.

Lundeen, R.C.; McDavid, W.D.; Barnwell, G.M.

1988-12-01T23:59:59.000Z

429

The role of f electrons in rare-earth and uranium intermetallics  

SciTech Connect

Electronic structures of Nd{sup 3+} and U{sup 3+} icon NdNi{sub 5} and UPd{sub 2}Al{sub 3} intermetallic compounds have been discussed. The strong correlation between the charge distribution at vicinity of the f-shell electrons and the magnetic state of the f electron subsystem of these Kramers icons has been underlined. The formation of the local magnetic moment, of the ordered magnetic state, of the singlet ground state and of the energy gap in the ordered state is evaluated in conjugation with the temperature dependence of the energy level scheme. It is argued that as a functions of the charge distribution and the spin-dependent interactions many exotic properties are expected resembling those found in heavy-fermion compounds.

Radwanski, R.J. [Centre for Solid State Physics, Krakow (Poland)] [Centre for Solid State Physics, Krakow (Poland)

1994-03-01T23:59:59.000Z

430

The progress of TiO2 nanocrystals doped with rare earth ions  

Science Journals Connector (OSTI)

In the past decades, TiO2 nanocrystals (NCs) have been widely studied in the fields of photoelectric devices, optical communication, and environment for their stability in aqueous solution, being nontoxic, cheapness, and so on. Among the three ...

Hai Liu; Lixin Yu; Weifan Chen; Yingyi Li

2012-01-01T23:59:59.000Z

431

The rare earth element distribution over Europe: geogenic and anthropogenic sources  

Science Journals Connector (OSTI)

...increased risk of liver and bone cancer. REE toxicity has been investigated...such as seawater tends to be depleted in Ce on REE plots. The FOREGS...very similar to that of high uranium values described by Plant et...G., The distribution of uranium over Europe: geological and...

L. Fedele; J.A. Plant; B. De Vivo; A. Lima

432

New fission fragment distributions and r-process origin of the rare-earth elements  

E-Print Network (OSTI)

Neutron star (NS) merger ejecta offer a viable site for the production of heavy r-process elements with nuclear mass numbers A > 140. The crucial role of fission recycling is responsible for the robustness of this site against many astrophysical uncertainties, but calculations sensitively depend on nuclear physics. In particular the fission fragment yields determine the creation of 110 140.

Goriely, S; Lemaitre, J -F; Panebianco, S; Dubray, N; Hilaire, S; Bauswein, A; Janka, H -Thomas

2013-01-01T23:59:59.000Z

433

Stark broadening data for spectral lines of rare-earth elements: Nb III  

E-Print Network (OSTI)

The electron-impact widths for 15 doubly charged Nb ion lines have been theoretically determined by using the modified semiempirical method. Using the obtained results, we considered the influence of the electron-impact mechanism on line shapes in spectra of chemically peculiar stars and white dwarfs.

Simi?, Zoran; Popovi?, Luka ?

2013-01-01T23:59:59.000Z

434

Alternative High-Performance Motors with Non-Rare Earth Materials  

Energy.gov (U.S. Department of Energy (DOE))

2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

435

R-Process Freezeout, Nuclear Deformation, and the Rare-Earth Element Peak  

E-Print Network (OSTI)

We use network calculations of r-process nucleosynthesis to explore the origin of the peak in the solar r-process abundance distribution near nuclear mass number A = 160. The peak is due to a subtle interplay of nuclear deformation and beta decay, and forms not in the steady phase of the r-process, but only just prior to freezeout, as the free neutrons rapidly disappear. Its existence should therefore help constrain the conditions under which the r-process occurs and freezes out.

R. Surman; J. Engel; J. R. Bennett; B. S. Meyer

1997-01-03T23:59:59.000Z

436

Rare earth element sorption onto hydrous manganese oxide A modeling study  

E-Print Network (OSTI)

element sorption onto hydrous manganese oxide A modeling study Olivier Pourret1* and Mélanie Davranche2 1 models due to the lack of a comprehensive set of sorption reactions consistent with a given surface complexation model (SCM), as well as discrepancies between published sorption data and predictions using

Paris-Sud XI, Université de

437

Parity nonconservation in Fr-like actinide and Cs-like rare-earth-metal ions  

Science Journals Connector (OSTI)

Parity-nonconservation (PNC) amplitudes are calculated for the 7s-6d3/2 transitions of the francium isoelectronic sequence (Fr, Ra+, Ac2+, Th3+, Pa4+, U5+, and Np6+) and for the 6s-5d3/2 transitions of the cesium isoelectronic sequence (Cs, Ba+, La2+, Ce3+, and Pr4+). We show in particular that isotopes of La2+, Ac2+, and Th3+ ions have strong potential in the search for new physics beyond the standard model: The PNC amplitudes are large, the calculations are accurate, and the nuclei are practically stable. In addition, 232Th3+ ions have recently been trapped and cooled [Campbell et al., Phys. Rev. Lett. 102, 233004 (2009)]. We also extend previous works by calculating the s-s PNC transitions in Ra+ and Ba+ and provide calculations of several energy levels, and electric dipole and quadrupole transition amplitudes for the Fr-like actinide ions.

B. M. Roberts; V. A. Dzuba; V. V. Flambaum

2013-07-15T23:59:59.000Z

438

Resonant Inelastic X-ray Scattering of Rare-Earth and Copper Systems  

E-Print Network (OSTI)

2.3 Corrosion of Copper Films in Aqueous2.3.1 Cu 2p XAS of Copper Films in Various2.3.2 Cu 2p RIXS of Copper Film in Groundwater

Kvashnina, Kristina

2007-01-01T23:59:59.000Z

439

E-Print Network 3.0 - actinide-rare earth fraction Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Group Collection: Biology and Medicine ; Environmental Sciences and Ecology 8 The Greenhouse Effect Temperature Equilibrium Summary: The Greenhouse Effect 12;Temperature...

440

Wavelength-stable rare earth-free green light-emitting diodes for energy efficiency  

Science Journals Connector (OSTI)

Solid state lighting seeks to replace both, incandescent and fluorescent lighting by energy efficient light-emitting diodes (LEDs). Just like compact fluorescent tubes, current white...

Wetzel, Christian; Detchprohm, Theeradetch

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Creating a Star on Earth  

Energy.gov (U.S. Department of Energy (DOE))

At the Energy Department's Princeton Plasma Physics Lab, scientists are trying to accomplish what was once considered the realm of science fiction: creating a star on Earth.

442

Earth Day 2014 Photo Contest  

Office of Environmental Management (EM)

Earth Day 2014 Photo Contest CALLING ALL PHOTOGRAPHERS Professionals, amateurs, and the camera sharp shooter We invite all DOE employees and DOE contractors to share images of...

443

Dynamics of Earth's Hadley circulation.  

E-Print Network (OSTI)

?? This thesis advances our understanding of the mechanisms controlling the Hadley circulation, and its interaction with eddies on planetary scales in particular. On Earth,… (more)

Levine, Xavier Josselin

2013-01-01T23:59:59.000Z

444

Oscillating and stagnating plumes in the Earth's lower mantle Henri Samuel , David Bercovici  

E-Print Network (OSTI)

balance calculations based either on carbonaceous chondrites [2] or enstatite chondrites [3] suggest and seismological observations suggest that the Earth's mantle is heterogeneous in major element composition. Mass

445

Geoengineering the Earth's Climate  

SciTech Connect

Emergency preparedness is generally considered to be a good thing, yet there is no plan regarding what we might do should we be faced with a climate emergency. Such an emergency could take the form of a rapid shift in precipitation patterns, a collapse of the great ice sheets, the imminent triggering of strong climate system feedbacks, or perhaps the loss of valuable ecosystems. Over the past decade, we have used climate models to investigate the potential to reverse some of the effects of greenhouse gases in the atmosphere by deflecting some incoming sunlight back to space. This would probably be most cost-effectively achieved with the placement of small particles in or above the stratosphere. Our model simulations indicate that such geoengineering approaches could potentially bring our climate closer to the state is was in prior to the introduction of greenhouse gases. This talk will present much of what is known about such geoengineering approaches, and raise a range of issues likely to stimulate lively discussion. Speaker: Ken Caldeira Ken Caldeira is a scientist at the Carnegie Institution Department of Global Ecology and a Professor (by courtesy) at the Stanford University Department of Environmental and Earth System Sciences. Previously, he worked for 12 years in the Energy and Environment Directorate at the Lawrence Livermore National Laboratory (Department of Energy). His research interests include the numerical simulation of Earth's climate, carbon, and biogeochemistry; ocean acidification; climate emergency response systems; evaluating approaches to supplying environmentally-friendly energy services; ocean carbon sequestration; long-term evolution of climate and geochemical cycles; and marine biogeochemical cycles. Caldeira has a B.A. in Philosophy from Rutgers College and an M.S. and Ph.D. in Atmospheric Sciences from New York University.

Google Tech Talks

2008-01-08T23:59:59.000Z

446

Earth and Sustainability 1. General Information  

E-Print Network (OSTI)

Earth and Sustainability 1. General Information Deans: Prof. dr. G.J. van der Zwaan (Faculty of Geosciences) Prof. dr. ir. A. Bliek (Faculty of Science) Constituting faculty focus areas: Solid Earth (Dept. Earth Sciences), Earth Surface Analysis (Depts. Earth Sciences, Physical Geography), Climate and Global

Utrecht, Universiteit

447

Earth Sciences Take on the world  

E-Print Network (OSTI)

Earth Sciences Take on the world Career paths Earth Sciences graduate Gerard Bird. Careers Coastal engineer Environmental consultant Earth scientist Engineering geologist Environmental Email: science@waikato.ac.nz Visit: www.earth.waikato.ac.nz earth sCienCes Surrounded by diverse

Waikato, University of

448

Blue Earth-Nicollet-Faribault | Open Energy Information  

Open Energy Info (EERE)

Earth-Nicollet-Faribault Earth-Nicollet-Faribault Jump to: navigation, search Name Blue Earth-Nicollet-Faribault Place Minnesota Utility Id 1884 Utility Location Yes Ownership C NERC Location MRO NERC MRO Yes Activity Distribution Yes Alt Fuel Vehicle Yes Alt Fuel Vehicle2 Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png No rate schedules available. Average Rates Residential: $0.1120/kWh Commercial: $0.0912/kWh References ↑ "EIA Form EIA-861 Final Data File for 2010 - File1_a" Retrieved from "http://en.openei.org/w/index.php?title=Blue_Earth-Nicollet-Faribault&oldid=409059

449

Natural Sciences Tripos EARTH SCIENCES  

E-Print Network (OSTI)

. The majority of Cambridge graduates remain within geology. Exploration and production of oil and gas still is the science of the Earth. What is the Earth made of? What processes shape and change it? What's happened of processes, geology is a holistic science, integrating physics, chemistry and biology with the evidence

Cambridge, University of

450

CHEMISTRY AND THE SOLID EARTH  

Science Journals Connector (OSTI)

CHEMISTRY AND THE SOLID EARTH ... By now, he has almost completely filled the blackboard, as he keeps up a steady drumfire of excited talk of the latest findings in geochemistry and geophysics—touching on everything from the origin of the solar system to the chemical nature of the earth's core to the enigmatic structure of the Mohorovi?i? discontinuity. ...

HOWARD J. SANDERS

1967-10-02T23:59:59.000Z

451

RARE KAON DECAYS: IL BUONO, IL BRUTTO, IL CATTIVO.  

SciTech Connect

The author briefly reviews recent progress in rare kaon decays, where he takes ''rare'' to mean those with {Beta} < {Omicron}(10{sup -7}).

REDLINGER,G.

2004-06-07T23:59:59.000Z

452

Using Rare Gas Permeation to Probe Methanol Diffusion near the...  

NLE Websites -- All DOE Office Websites (Extended Search)

Rare Gas Permeation to Probe Methanol Diffusion near the Glass Transition Temperature. Using Rare Gas Permeation to Probe Methanol Diffusion near the Glass Transition Temperature....

453

Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture  

DOE Patents (OSTI)

Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture are described. According to one embodiment, an earth analysis method includes engaging a device with the earth, analyzing the earth in a single substantially lineal direction using the device during the engaging, and providing information regarding a subsurface feature of the earth using the analysis.

West, Phillip B. (Idaho Falls, ID); Novascone, Stephen R. (Idaho Falls, ID); Wright, Jerry P. (Idaho Falls, ID)

2012-05-29T23:59:59.000Z

454

Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture  

DOE Patents (OSTI)

Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture are described. According to one embodiment, an earth analysis method includes engaging a device with the earth, analyzing the earth in a single substantially lineal direction using the device during the engaging, and providing information regarding a subsurface feature of the earth using the analysis.

West, Phillip B. (Idaho Falls, ID); Novascone, Stephen R. (Idaho Falls, ID); Wright, Jerry P. (Idaho Falls, ID)

2011-09-27T23:59:59.000Z

455

Earth Day 2014 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

celebrating Earth Day all week long. It's Earth Week on Energy.gov We're focusing on climate change, highlighting Earth Day events and sharing ways Americans ActOnClimate --...

456

MATHEMATICS OF PLANET EARTH PRESS RELEASE  

E-Print Network (OSTI)

MATHEMATICS OF PLANET EARTH PRESS RELEASE MARCH 5 2013 MATHEMATICS OF PLANET EARTH DAY AT UNESCO Paris (France) ­ March 5 2013 in a major world-wide initiative: Mathematics of Planet Earth 2013 (MPE2013). This year

457

Heterogeneity and Flow in the Deep Earth  

E-Print Network (OSTI)

The age of the inner core. Earth Planet. Sc. Lett. 190 (3-1995. The composition of the Earth 1. Chem. Geol. 120 (3-4),thermal evolution of the Earths core. J. Geophys. Res 101,

Cottaar, Sanne

2013-01-01T23:59:59.000Z

458

Development and application of earth system models  

Science Journals Connector (OSTI)

...Development and application of earth system models 10.1073/pnas.1107470109...to climate mitigation that earth system models can help inform. These models...processes. Why do we need earth system models (ESMs)? First, such models...

Ronald G. Prinn

2013-01-01T23:59:59.000Z

459

Planning for Earth Day | Department of Energy  

Energy Savers (EERE)

Planning for Earth Day Planning for Earth Day April 16, 2014 - 10:14am Addthis Earth Day is a great time to enjoy the outdoors and consider the environment. | Photo courtesy of...

460

Cerium-Based Magnets: Novel High Energy Permanent Magnet Without Critical Elements  

SciTech Connect

REACT Project: Ames Laboratory will develop a new class of permanent magnets based on the more commonly available element cerium for use in both EVs and renewable power generators. Cerium is 4 times more abundant and significantly less expensive than the rare earth element neodymium, which is frequently used in today’s most powerful magnets. Ames Laboratory will combine other metal elements with cerium to create a new magnet that can remain stable at the high temperatures typically found in electric motors. This new magnetic material will ultimately be demonstrated in a prototype electric motor, representing a cost-effective and efficient alternative to neodymium-based motors.

None

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

NETL: "Earth Day" Poster Contest  

NLE Websites -- All DOE Office Websites (Extended Search)

Contest Contest YOU'RE INVITED TO COME JOIN THE FUN AND HELP US CELEBRATE EARTH DAY 2009 BY SHARING YOUR IDEAS ON WHAT "EARTH DAY" MEANS TO YOU. We'd like your K thru 5th grade students to once again share their ideas on what "Earth Day" means to them by participating in the National Energy Technology Laboratory's (NETL's) poster contest for Earth Day 2009. Earth Day is a time set aside each year to create an awareness of the importance of recycling, conserving energy, improving air quality and making our environment a cleaner place to live. Earth Day challenges each and every one of us to do our part for the planet. All poster submittals will be displayed at our NETL sites (Albany, OR; Houston, TX; Pittsburgh, PA; and Morgantown, WV) from April 15, 2009 through May 8, 2009. A team of judges will review all posters and choose three winners from each grade level (K-5). Criteria for the winning poster will be based on originality, imagination, and innovative ideas. All participants will receive a certificate. Winners will receive a medal and a certificate, along with an opportunity to have their name and photograph in our NETL News publication. Winners will be notified by April 21, 2009 (Earth Week) and recognized with a certificate and medal citing their achievement. The winners, names and entries will be posted in the Educational Initiatives web area on the NETL website.

462

Earth drill rig  

SciTech Connect

This patent describes an earth drill rig wherein an upwardly and downwardly moving drill-string-turning rotary table is rotated by a kelly bar connected at its lower end to a vertical drive shaft, the kelly bar being journalled for rotation in and fixed against axial movement with respect to a drill frame assembly and the rotary table being mounted for axial movement on and along the drill frame assembly. The drill frame assembly is pivotally mounted on a vehicle on a substantially horizontal axis for pivoting between an upright position and a substantially horizontal position for transportation. The improvement described here comprises the drill frame assembly pivot axis positioned below the lower end of the kelly bar and above the upper end of the vertical drive shaft, and a universal coupling connecting the lower end of the kelly bar and the vertical drive shaft the universal coupling comprising universal joints at opposite ends of an elongated slip joint connector and connected there-by for relative axial movement but driving coupling between the universal joints. The universal joints lie generally on a circle of which the drill frame assembly pivot axis is the center. The drill frame assembly can be moved between the upright and the substantially horizontal positions without disconnecting the kelly bar from the vertical drive shaft, the kelly bar being revolvable by the drive shaft through substantially the entire range of movement of the drill frame assembly.

Rassieur, C.L.

1987-01-27T23:59:59.000Z

463

Exploring Earth-Building Technology for Liberia.  

E-Print Network (OSTI)

?? This paper discusses earth as a building material and the extent to which earth building technology has evolved over the years. In particular it… (more)

Mayon, Isaac Dompo

2009-01-01T23:59:59.000Z

464

Google Earth, den universale GIS-klienten?.  

E-Print Network (OSTI)

??Google has released a virtual three-dimensional model of the earth through the product Google Earth. This product gives us easy access to huge amounts of… (more)

Bøhn, Eivind

2006-01-01T23:59:59.000Z

465

Earth Day event showcases LANL energy work  

NLE Websites -- All DOE Office Websites (Extended Search)

Earth Day showcases energy work Earth Day event showcases LANL energy work The public is invited to learn about projects in energy conservation, generation, research, and...

466

2014 Earth Day | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

2014 Earth Day celebration, children from Argonne's Child Development Center planted a White Oak tree and participated in an environmental learning activity. 2014 Argonne Earth...

467

Search for: "earth modeling" | DOE PAGES  

Office of Scientific and Technical Information (OSTI)

earth modeling" Find + Advanced Search Advanced Search All Fields: "earth modeling" Title: Full Text: Bibliographic Data: Creator Author: Name Name ORCID Search Authors Type:...

468

EARTH SURFACE PROCESSES AND LANDFORMS Earth Surf. Process. Landforms (2010)  

E-Print Network (OSTI)

, Bangladesh 8 Institute of Water Modeling, Dhaka, Bangladesh Received 12 January 2009; Revised 10 July 2009 environments. First, repeat-pass interferometric SAR measurements from the Japanese Earth Resources Satellite

Howat, Ian M.

469

Model of Intraseasonal Oscillations in Earth’s Atmosphere  

Science Journals Connector (OSTI)

We suggest a way of rationalizing intraseasonal oscillations of Earth’s atmospheric flow as four meteorologically relevant triads of interacting planetary waves, isolated from the system of all of the rest of the planetary waves. Our model is independent of the topography (mountains, etc.) and gives a natural explanation of intraseasonal oscillations in both the Northern and the Southern Hemispheres. Spherical planetary waves are an example of a wave mesoscopic system obeying discrete resonances that also appears in other areas of physics.

Elena Kartashova and Victor S. L’vov

2007-05-10T23:59:59.000Z

470

NREL: Technology Transfer - White Earth Nation Installs Turbines: A Wind  

NLE Websites -- All DOE Office Websites (Extended Search)

White Earth Nation Installs Turbines: A Wind Powering America Success Story White Earth Nation Installs Turbines: A Wind Powering America Success Story February 11, 2013 Almost 8 years after taking the initial steps to harness the wind, the White Earth Nation recently completed the installation of two small wind turbines that will help offset energy costs for Minnesota's largest and most populous Native American reservation. Mike Triplett, economic development planner with the White Earth Development Office, believes that the project represents a unique opportunity for tribal entities in the United States. He noted that tribes don't qualify for tax-based incentives. "And as for working with investors, we never found that to be a viable option," Triplett said. "So we've relied heavily on grants." Funded through nearly $1.8 million in congressional appropriations along

471

SEESM: Scalable Extensible Earth System Model for Climate Change Science |  

NLE Websites -- All DOE Office Websites (Extended Search)

SEESM: Scalable Extensible Earth System Model for Climate Change Science SEESM: Scalable Extensible Earth System Model for Climate Change Science SEESM: Scalable Extensible Earth System Model for Climate Change Science This SciDAC project will transform an existing, state-of-the-science, third-generation global climate model, the Community Climate System Model (CCSM3), into a first-generation Earth system model that fully simulates the relationships between the physical, chemical, and bio-geochemical processes in the climate system. The model will incorporate new processes necessary to predict future climates based on the specification of greenhouse gas emissions rather than specification of atmospheric concentrations, as is done in present models, which make assumptions about the carbon cycle that are likely not valid. This project will include comprehensive treatments of the processes

472

Antineutrinos from Earth: A reference model and its uncertainties  

Science Journals Connector (OSTI)

We predict geoneutrino fluxes in a reference model based on a detailed description of Earth’s crust and mantle and using the best available information on the abundances of uranium, thorium, and potassium inside Earth’s layers. We estimate the uncertainties of fluxes corresponding to the uncertainties of the element abundances. In addition to distance integrated fluxes, we also provide the differential fluxes as a function of distance from several sites of experimental interest. Event yields at several locations are estimated and their dependence on the neutrino oscillation parameters is discussed. At Kamioka we predict N(U+Th)=35±6 events for 1032 proton yr and 100% efficiency assuming sin2(2?)=0.863 and ?m2=7.3×10-5 eV2. The maximal prediction is 55 events, obtained in a model with fully radiogenic production of the terrestrial heat flow.

Fabio Mantovani; Luigi Carmignani; Gianni Fiorentini; Marcello Lissia

2004-01-07T23:59:59.000Z

473

Earth Day | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Earth Day Earth Day Earth Day If you do not see the event begin at 3pm ET, please refresh your browser. Are you looking for ways to go green while saving yourself some green? Or are you interested in learning how to incorporate renewable energy options -- like solar, wind and geothermal -- into your home? This Earth Day, hang out with Energy Department experts to learn how you can reduce your energy use, improve your home's comfort and cut your energy bills. We hope you'll join us on April 22 at 3 pm ET for a Google+ Hangout on home energy efficiency tips and advice, and learn how you can submit your questions now. During the Hangout, we'll be sharing some of our Twitter followers' favorite energy-savings tips -- share yours now using #tipsEnergy. Panelists include:

474

Beginning of life on Earth  

NLE Websites -- All DOE Office Websites (Extended Search)

Beginning of life on Earth Beginning of life on Earth Name: beatnik Status: N/A Age: 12 Location: N/A Country: N/A Date: Around 1993 Question: I am twelve years old and want to know how life began on earth. Replies: I am 43 years old and so would I! Scientists believe that lightning striking the atmosphere of the earth long ago caused certain simple chemicals like ammonia to form into more complicated chemicals that could lead to living cells. These chemicals then could hook together in chains to form molecules that direct life, such as RNA and DNA. One theory also says that fats in the primitive ocean acted on by waves, formed large globules enclosing these life directing chemicals, and that these structures eventually formed primitive cells. Then inside the cells, conditions could evolve to allow the chemistry of life to work better and better, and so on

475

Trellis Earth | Open Energy Information  

Open Energy Info (EERE)

Trellis Earth Trellis Earth Jump to: navigation, search Logo: Trellis Earth Name Trellis Earth Address 13315 NE Airport Way Place Portland, Oregon Zip 97230 Sector Efficiency Product Renewable bioplastic bags, cutlery, flatware and packaging Website http://www.trellisearth.com/ Coordinates 45.563182°, -122.524952° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.563182,"lon":-122.524952,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

476

Earth and Moon orbital anomalies  

E-Print Network (OSTI)

A time-dependent gravitational constant or mass would correctly describe the suspected increasing of both: the Astronomical unit and the eccentricity of the Lunar orbit around the Earth.

Ll. Bel

2014-02-18T23:59:59.000Z

477

Chemistry, Life, and Earth Sciences  

NLE Websites -- All DOE Office Websites (Extended Search)

Nan Sauer named Associate Director for Chemistry, Life, and Earth Sciences August 9, 2011 - 2 - LOS ALAMOS, New Mexico, August 9, 2011- Nancy ("Nan") Sauer is the new associate...

478

Search for rare and forbidden eta ' decays  

E-Print Network (OSTI)

We have searched for rare and forbidden decays of the eta' meson in hadronic events at the CLEO II detector. The search is conducted on 4.80 fb(-1) of e(+)e(-) collisions at 10.6 GeV center-of-mass energy at the Cornell Electron Storage Ring. We...

Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, X.

2000-01-01T23:59:59.000Z

479

Mikhail Avilov Facility for Rare Isotope Beams  

E-Print Network (OSTI)

Challenges Chemical Challenges Radiation Challenges Summary #12; World-leading heavy ion accelerator facility for rare isotope science · Nuclear Structure · Nuclear Astrophysics · Fundamental Interactions Target vacuum vessel M. Avilov, May 2014 5th HP Targetry Workshop, FNAL, Slide 4 Target Beam dump Beam

McDonald, Kirk

480

Multicanonical sampling of rare events in random matrices  

SciTech Connect

A method based on multicanonical Monte Carlo is applied to the calculation of large deviations in the largest eigenvalue of random matrices. The method is successfully tested with the Gaussian orthogonal ensemble, sparse random matrices, and matrices whose components are subject to uniform density. Specifically, the probability that all eigenvalues of a matrix are negative is estimated in these cases down to the values of {approx}10{sup -200}, a region where simple random sampling is ineffective. The method can be applied to any ensemble of matrices and used for sampling rare events characterized by any statistics.

Saito, Nen; Iba, Yukito; Hukushima, Koji [Graduate School of Science and Cybermedia Center, Osaka University, Toyonaka, Osaka 560-0043 (Japan); Institute of Statistical Mathematics, 10-3 Midorimachi, Tachikawa, Tokyo 190-8562 (Japan); Department of Basic Science, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902 (Japan)

2010-09-15T23:59:59.000Z

Note: This page contains sample records for the topic "rare earth based" from the National Library of EnergyBeta (NLEBeta).
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481

Introduction Flattening the Earth Continuation procedure Flat Earth Numerical simulations Continuation from a flat to a round Earth model  

E-Print Network (OSTI)

Introduction Flattening the Earth Continuation procedure Flat Earth Numerical simulations Continuation from a flat to a round Earth model in the coplanar orbit transfer problem M. Cerf1, T. Haberkorn, SADCO 2011, March 2nd M. Cerf, T. Haberkorn, E. Tr´elat Continuation from a flat to a round Earth model

Boyer, Edmond

482

Honor the Earth | Open Energy Information  

Open Energy Info (EERE)

Honor the Earth Honor the Earth Jump to: navigation, search Name Honor the Earth Place Minneapolis, Minnesota Zip 55404 Sector Renewable Energy Product Minnesota-based organisation working nationally to promote renewable energy on tribal lands to build leadership in Native communities for a new energy future rooted in environmental justice and seeking to mitigate global climate change. Coordinates 44.979035°, -93.264929° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.979035,"lon":-93.264929,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

483

Earth: 15 Million Years Ago  

E-Print Network (OSTI)

In Einstein's general relativity theory the metric component gxx in the direction of motion (x-direction) of the sun deviates from unity due to a tensor potential caused by the black hole existing around the center of the galaxy. Because the solar system is orbiting around the galactic center at 200 km/s, the theory shows that the Newtonian gravitational potential due to the sun is not quite radial. At the present time, the ecliptic plane is almost perpendicular to the galactic plane, consistent with this modification of the Newtonian gravitational force. The ecliptic plane is assumed to maintain this orientation in the galactic space as it orbits around the galactic center, but the rotational angular momentum of the earth around its own axis can be assumed to be conserved. The earth is between the sun and the galactic center at the summer solstice all the time. As a consequence, the rotational axis of the earth would be parallel to the axis of the orbital rotation of the earth 15 million years ago, if the solar system has been orbiting around the galactic center at 200 km/s. The present theory concludes that the earth did not have seasons 15 million years ago. Therefore, the water on the earth was accumulated near the poles as ice and the sea level was very low. Geological evidence exists that confirms this effect. The resulting global ice-melting started 15 million years ago and is ending now.

Masataka Mizushima

2008-10-13T23:59:59.000Z

484

Earth Sciences Division Research Summaries 2006-2007  

E-Print Network (OSTI)

should develop Earth System Models (ESMs). ESMs will beshould develop Earth System Models (ESMs) designed to

DePaolo, Donald

2008-01-01T23:59:59.000Z

485

Earth Repair: A Transatlantic History of Environmental Restoration  

E-Print Network (OSTI)

Earth Repair: A Transatlantic History of EnvironmentalHall. Earth Repair: A Transatlantic History of Environmental

Hamilton-Smith, Elery

2006-01-01T23:59:59.000Z

486

106 | Triennial Scientific Report EC-EARTH: goals, developments  

E-Print Network (OSTI)

Earth'sglobalclimatesystemisstrongly affectedbytheinteractionsbetweenitsvarioussubsys- tems1) .Asaresult,attentionhasshiftedtothedevelop- mentofEarthSystemModels

Stoffelen, Ad

487

MILANKOVITCH CYCLES AND THE EARTH'S CLIMATE  

E-Print Network (OSTI)

becoming covered with ice, 34 million years ago? #12;Some puzzles: Why has the Earth been cooling, overall at different time scales. The Earth has been cooling for at least 15 million years, with glaciers the Earth been cooling, overall, through the last 50 million years? #12;Some puzzles: Why has the Earth been

Baez, John

488

CoastWatch Data in Google Earth  

E-Print Network (OSTI)

CoastWatch Data in Google Earth: A How-to Guide Peter Hollemans, Terrenus Earth Sciences Consultant for NOAA/NESDIS CoastWatch Operations Managers Meeting, June, 2007 #12;Peter Hollemans, Terrenus Earth Sciences Consultant for NOAA/NESDISJune, 2007 Talk Outline · About Google Earth · Preparing Data

489

MIDDLE EARTH MOVE OUT INFORMATION 2013  

E-Print Network (OSTI)

MIDDLE EARTH MOVE OUT INFORMATION 2013 Start thinking about the move-out process now. If you to you by your RA, sent to you by e-mail, and updated on the Middle Earth website (http://www.housing.uci.edu/housingOptions/Middle_Earth noon on June 15th must submit a written request to the Middle Earth Housing Office at middleearth

Barrett, Jeffrey A.

490

Expanding Earth Sciences Research with Layerscape  

E-Print Network (OSTI)

Expanding Earth Sciences Research with Layerscape In Brief Websites: layerscape Earth in three-dimensional space and time. Oceanographers and earth scientists are using this free set of serious illness in the hospital was pneumonia." The Earth is a vast, complicated system comprised

Jakubowski, Mariusz H.

491

The Inner Solar System Characteristics of Earth  

E-Print Network (OSTI)

The Inner Solar System #12;The Earth #12;Characteristics of Earth A terrestrial, rocky planet floats on mantle · Crust is created and destroyed #12;Characteristics of Earth Today Surface: · 70% water · 30% land Atmosphere: ·77% N2 ·21% O2 ·0.1% H2O ·+Ar, CO2, Ne #12;The Dynamic Earth Molten Core

Walter, Frederick M.

492

Reading Comprehension - The Earth's Energy Budget  

NLE Websites -- All DOE Office Websites (Extended Search)

The Earth's Energy Budget The Earth's Energy Budget The way the Earth interacts with the sun's energy can be displayed in a diagram called the _________ Earth's energy budget globe warming schedule Earth's flow chart . It displays the sun's energy that reaches us and how much of that energy is _________ going absorbed and reflected destroyed wasted by the earth and its atmosphere. Solar energy reaches earth as _________ Superman a gas electromagnetic radiation quickly as possible . Once the energy reaches earth, some of it is absorbed by the atmosphere, including _________ lakes mountains people clouds . Some of it makes it to the earth's surface, and is absorbed by land and oceans. The amount of energy absorbed affects _________ tides temperature nothing fishing . The energy that is not absorbed by the earth or its atmosphere is _________

493

The fate of Earth's ocean Hydrology and Earth System Sciences, 5(4), 569575 (2001) EGS  

E-Print Network (OSTI)

The fate of Earth's ocean 569 Hydrology and Earth System Sciences, 5(4), 569­575 (2001) © EGS The fate of Earth's ocean Christine Bounama, Siegfried Franck and Werner von Bloh Potsdam Institute@pik-potsdam.de Abstract Questions of how water arrived on the Earth's surface, how much water is contained in the Earth

Paris-Sud XI, Université de

494

Rare K decays: Challenges and Perspectives  

E-Print Network (OSTI)

At this stage of the LHC program, the prospect for a new physics signal in the very rare K ---> pi nu nu bar decays may be dented, but remains well alive thanks to their intrinsic qualities. First, these decays are among the cleanest observables in the quark flavor sector. When combined with their terrible suppression in the Standard Model, they thus offer uniquely sensitive probes. Second, the LHC capabilities are not ideal for all kinds of new physics, even below the TeV scale. For example, rather elusive scenarios like natural-SUSY-like hierarchical spectrum, baryon number violation, or new very light but very weakly interacting particles may well induce deviations in rare K decays. Even though experimentalists should brace themselves for tiny deviations, these modes thus have a clear role to play in the LHC era.

Christopher Smith

2014-09-22T23:59:59.000Z

495

City of Blue Earth, Minnesota (Utility Company) | Open Energy Information  

Open Energy Info (EERE)

Earth, Minnesota (Utility Company) Earth, Minnesota (Utility Company) Jump to: navigation, search Name City of Blue Earth Place Minnesota Utility Id 1883 Utility Location Yes Ownership M NERC Location MRO NERC MRO Yes ISO MISO Yes Operates Generating Plant Yes Activity Generation Yes Activity Buying Transmission Yes Activity Distribution Yes Activity Retail Marketing Yes Activity Bundled Services Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png Commercial Electric Commercial Industrial Electric Industrial Industrial Electric (No Rachet) Industrial Industrial Electric - Demand Credit Industrial

496

Earth's Heat Source - The Sun  

E-Print Network (OSTI)

The Sun encompasses planet Earth, supplies the heat that warms it, and even shakes it. The United Nation Intergovernmental Panel on Climate Change (IPCC) assumed that solar influence on our climate is limited to changes in solar irradiance and adopted the consensus opinion of a Hydrogen-filled Sun, the Standard Solar Model (SSM). They did not consider the alternative solar model and instead adopted another consensus opinion: Anthropogenic greenhouse gases play a dominant role in climate change. The SSM fails to explain the solar wind, solar cycles, and the empirical link of solar surface activity with Earth changing climate. The alternative solar model, that was molded from an embarrassingly large number of unexpected observations revealed by space-age measurements since 1959, explains not only these puzzles but also how closely linked interactions between the Sun and its planets and other celestial bodies induce turbulent cycles of secondary solar characteristics that significantly affect Earth climate.

Oliver K. Manuel

2009-05-05T23:59:59.000Z

497

Earth's Heat Source - The Sun  

E-Print Network (OSTI)

The Sun encompasses planet Earth, supplies the heat that warms it, and even shakes it. The United Nation Intergovernmental Panel on Climate Change (IPCC) assumed that solar influence on our climate is limited to changes in solar irradiance and adopted the consensus opinion of a Hydrogen-filled Sun, the Standard Solar Model (SSM). They did not consider the alternative solar model and instead adopted another consensus opinion: Anthropogenic greenhouse gases play a dominant role in climate change. The SSM fails to explain the solar wind, solar cycles, and the empirical link of solar surface activity with Earth changing climate. The alternative solar model, that was molded from an embarrassingly large number of unexpected observations revealed by space-age measurements since 1959, explains not only these puzzles but also how closely linked interactions between the Sun and its planets and other celestial bodies induce turbulent cycles of secondary solar characteristics that significantly affect Earth climate.

Manuel, Oliver K

2009-01-01T23:59:59.000Z

498

NEWTON's Environmental and Earth Science References  

NLE Websites -- All DOE Office Websites (Extended Search)

Environmental and Earth Science References Environmental and Earth Science References Do you have a great reference link? Please click our Ideas page. Featured Reference Links: >NASA's Earth Science Division NASA's Earth Science Division Find the answers to the big questions of Earth Science such as "How is the World Changing?" The information and articles are provided by NASA's Earth Science Division Geology.com Resources Teaching Earth Science - Geology.com Geology.com provides news and information about Geology and Earth Science. It has a teacher resource section as well, which provides a collection of classroom activities and lesson plans, for earth science in the classroom. IRIS's Seismographs in Schools Program IRIS's Seismographs in Schools Program Discover tools to share seismic data in real-time, classroom activities, and technical support documents for seismic instruments.

499

Gas giant planets as dynamical barriers to inward-migrating super-Earths  

E-Print Network (OSTI)

Planets of 1-4 times Earth's size on orbits shorter than 100 days exist around 30-50% of all Sun-like stars. In fact, the Solar System is particularly outstanding in its lack of "hot super-Earths" (or "mini-Neptunes"). These planets -- or their building blocks -- may have formed on wider orbits and migrated inward due to interactions with the gaseous protoplanetary disk. Here, we use a suite of dynamical simulations to show that gas giant planets act as barriers to the inward migration of super-Earths initially placed on more distant orbits. Jupiter's early formation may have prevented Uranus and Neptune (and perhaps Saturn's core) from becoming hot super-Earths. Our model predicts that the populations of hot super-Earth systems and Jupiter-like planets should be anti-correlated: gas giants (especially if they form early) should be rare in systems with many hot super-Earths. Testing this prediction will constitute a crucial assessment of the validity of the migration hypothesis for the origin of close-in supe...

Izidoro, Andre; Morbidelli, Alessandro; Hersant, Franck; Pierens, Arnaud

2015-01-01T23:59:59.000Z

500

Coupling climate models with the Earth System Modeling Framework and the Common Component Architecture  

Science Journals Connector (OSTI)

Typical Earth system models involve coupled model components in high-performance computing (HPC) environments. In the last few years, several frameworks have been developed for HPC applications. Two of them are component-based frameworks: the Earth System ... Keywords: climate model, framework, model coupling

S. J. Zhou

2006-02-01T23:59:59.000Z