Michael Griffin Senate Confirmation Hearing

NASA Image and Video Library

2005-04-12

U.S. Senator Barbara Mikulski, D-Md., left, talks with Michael Griffin as Senator Kay Bailey Hutchison, R-Tx., and Griffin's wife Rebecca look on prior to his testimony, Tuesday, April 12, 2005, at the Russell Senate Office Building in Washington. If confirmed, Griffin, who currently heads the space department at the Johns Hopkins University Applied Physics Laboratory will become NASA's 11th administrator. Photo Credit: (NASA/Renee Bouchard)

Michael Griffin Senate Confirmation Hearing

NASA Image and Video Library

2005-04-12

U.S. Senator Barbara Mikulski, D-Md., testifies before the U.S. Senate Commerce Committee during the confirmation hearing of Dr. Michael Griffin, rear center, Tuesday, April 12, 2005, at the Russell Senate Office Building in Washington. Griffin currently heads the space department at Johns Hopkins University's Applied Physics Laboratory. If confirmed by the full U.S. Senate, Dr. Griffin would be NASA's 11th administrator. Photo Credit: (NASA/Renee Bouchard)

Michael Griffin Senate Confirmation Hearing

NASA Image and Video Library

2005-04-11

U.S. Senator Barbara Mikulski, D-Md., testifies before the U.S. Senate Commerce Committee during the confirmation hearing of Dr. Michael Griffin, rear center, Tuesday, April 12, 2005, at the Russell Senate Office Building in Washington. Griffin currently heads the space department at Johns Hopkins University's Applied Physics Laboratory. If confirmed by the full U.S. Senate, Dr. Griffin would be NASA's 11th administrator. Photo Credit: (NASA/Renee Bouchard)

Michael Griffin Senate Confirmation Hearing

NASA Image and Video Library

2005-04-12

U.S. Senator Barbara Mikulski, D-Md., testifies before the U.S. Senate Commerce Committee during the confirmation hearing of Dr. Michael Griffin, right background, Tuesday, April 12, 2005, at the Russell Senate Office Building in Washington. Griffin currently heads the space department at Johns Hopkins University's Applied Physics Laboratory. If confirmed by the full U.S. Senate, Dr. Griffin would be NASA's 11th administrator. Photo Credit: (NASA/Renee Bouchard)

KSC-05PD-1041

NASA Technical Reports Server (NTRS)

2005-01-01

KENNEDY SPACE CENTER, FLA. In Orbiter Processing Facility bay 1, NASA Administrator Michael Griffin observes as technicians prepare Space Shuttle Atlantis for the second Return to Flight mission, STS-121. This is Griffin's first official visit to Kennedy Space Center. Griffin is the 11th administrator of NASA, a role he assumed on April 14, 2005. Griffin was nominated to the position in March while serving as the Space Department head at Johns Hopkins University's Applied Physics Laboratory in Baltimore. A registered professional engineer in Maryland and California, Griffin served as chief engineer at NASA earlier in his career. He holds numerous scientific and technical degrees including a Ph.D. in Aerospace Engineering from the University of Maryland.

KSC-05PD-1040

NASA Technical Reports Server (NTRS)

2005-01-01

KENNEDY SPACE CENTER, FLA. NASA Administrator Michael Griffin (left) tours Orbiter Processing Facility bay 1 where Space Shuttle Atlantis is currently being processed for the second Return to Flight mission, STS-121. He is accompanied by NASA ground systems engineer Doug Moore. This is Griffin's first official visit to Kennedy Space Center. Griffin is the 11th administrator of NASA, a role he assumed on April 14, 2005. Griffin was nominated to the position in March while serving as the Space Department head at Johns Hopkins University's Applied Physics Laboratory in Baltimore. A registered professional engineer in Maryland and California, Griffin served as chief engineer at NASA earlier in his career. He holds numerous scientific and technical degrees including a Ph.D. in Aerospace Engineering from the University of Maryland.

Griffin: A Tool for Symbolic Inference of Synchronous Boolean Molecular Networks.

PubMed

Muñoz, Stalin; Carrillo, Miguel; Azpeitia, Eugenio; Rosenblueth, David A

2018-01-01

Boolean networks are important models of biochemical systems, located at the high end of the abstraction spectrum. A number of Boolean gene networks have been inferred following essentially the same method. Such a method first considers experimental data for a typically underdetermined "regulation" graph. Next, Boolean networks are inferred by using biological constraints to narrow the search space, such as a desired set of (fixed-point or cyclic) attractors. We describe Griffin , a computer tool enhancing this method. Griffin incorporates a number of well-established algorithms, such as Dubrova and Teslenko's algorithm for finding attractors in synchronous Boolean networks. In addition, a formal definition of regulation allows Griffin to employ "symbolic" techniques, able to represent both large sets of network states and Boolean constraints. We observe that when the set of attractors is required to be an exact set, prohibiting additional attractors, a naive Boolean coding of this constraint may be unfeasible. Such cases may be intractable even with symbolic methods, as the number of Boolean constraints may be astronomically large. To overcome this problem, we employ an Artificial Intelligence technique known as "clause learning" considerably increasing Griffin 's scalability. Without clause learning only toy examples prohibiting additional attractors are solvable: only one out of seven queries reported here is answered. With clause learning, by contrast, all seven queries are answered. We illustrate Griffin with three case studies drawn from the Arabidopsis thaliana literature. Griffin is available at: http://turing.iimas.unam.mx/griffin.

Trent Griffin honored on Good Morning America

NASA Image and Video Library

2015-09-17

TRENT GRIFFIN, RIGHT, IS CONGRATULATED FOR HIS WORK IN THE COMMUNITY AND HIS OUTREACH EFFORTS TO ENCOURAGE STUDENTS TO ENTER THE SCIENCE, TECHNOLOGY, ENGINEERING AND MATH FIELDS BY MARSHALL CENTER DIRECTOR PATRICK SCHEUERMANN. GRIFFIN WAS FEATURED AS A HOMETOWN HERO ON ABC’S "GOOD MORNING AMERICA" AT THE U.S. SPACE & ROCKET CENTER.

Michael Griffin Senate Confirmation Hearing

NASA Image and Video Library

2005-04-12

Dr. Michael Griffin testifies, Tuesday, April 12, 2005, during his confirmation hearing before the U.S. Senate Commerce Committee at the Russell Senate Office Building in Washington. If confirmed, Griffin, who currently heads the space department at the Johns Hopkins University Applied Physics Laboratory will become NASA's 11th administrator. Photo Credit (NASA/Renee Bouchard)

Michael Griffin Senate Confirmation Hearing

NASA Image and Video Library

2005-04-11

Dr. Michael Griffin testifies, Tuesday, April 12, 2005, during his confirmation hearing before the U.S. Senate Commerce Committee at the Russell Senate Office Building in Washington. If confirmed, Griffin, who currently heads the space department at the Johns Hopkins University Applied Physics Laboratory will become NASA's 11th administrator. Photo Credit (NASA/Renee Bouchard)

KSC-05PD-1048

NASA Technical Reports Server (NTRS)

2005-01-01

KENNEDY SPACE CENTER, FLA. Michael Griffin (left), administrator of the National Aeronautics and Space Administration (NASA), and James Kennedy, director of the John F. Kennedy Space Center (KSC), address KSC employees during a Town Hall meeting. The meeting was held in the Training Auditorium and broadcast around the Center to employees not in attendance. This is Griffin's first official visit to Kennedy Space Center. Griffin is the 11th administrator of NASA, a role he assumed on April 14, 2005. Griffin was nominated to the position in March while serving as the Space Department head at Johns Hopkins University's Applied Physics Laboratory in Baltimore. A registered professional engineer in Maryland and California, Griffin served as chief engineer at NASA earlier in his career. He holds numerous scientific and technical degrees including a Ph.D. in Aerospace Engineering from the University of Maryland.

New Opportunities in Decay Spectroscopy with the GRIFFIN and DESCANT Arrays

NASA Astrophysics Data System (ADS)

Bildstein, V.; Andreoiu, C.; Ball, G. C.; Ballast, T.; Bartlett, C.; Bender, P. C.; Bernier, N.; Bianco, L.; Bishop, D.; Brennan, D.; Bruhn, T.; Cheeseman, A.; Churchman, R.; Ciccone, S.; Davids, B.; Demand, G.; Dillmann, I.; Garnsworthy, A. B.; Garrett, P. E.; Georges, S.; Hackman, G.; Hadinia, B.; Kokke, R.; Krücken, R.; Linn, Y.; Lim, C.; Martin, J.-P.; Miller, D.; Mills, W. J.; Morrison, L. N.; Ohlmann, C. A.; Park, J.; Pearson, C. J.; Pore, J. L.; Rajabali, M. M.; Rand, E. T.; Rizwan, U.; Sarazin, F.; Shaw, B.; Starosta, K.; Svensson, C. E.; Sumithrarachchi, C.; Unsworth, C.; Voss, P.; Wang, Z. M.; Williams, J.; Wong, J.; Wong, S.

The GRIFFIN (Gamma-Ray Infrastructure For Fundamental Investigations of Nuclei) project is a major upgrade of the decay spectroscopy capabilities at TRIUMF-ISAC. GRIFFIN will replace the 8π spectrometer with an array of up to 16 large-volume HPGe clover detectors and use a state-of-the-art digital data acquisition system. The existing ancillary detector systems that had been developed for 8π, such as the SCEPTAR array for β-tagging, PACES for high-resolution internal conversion electron spectroscopy, and the DANTE array of LaBr3/BaF2 scintillators for fast γ-ray timing, will be used with GRIFFIN. GRIFFIN can also accommodate the new neutron detector array DESCANT (Deuterated Scintillator Array for Neutron Tagging), enabling the study of β-delayed neutron emitters. DESCANT consists of up to 70 detectors, each filled with approximately 2 liters of deuterated benzene, a liquid scintillator that provides pulse-shape discrimination (PSD) capabilities to distinguish between neutrons and γ-rays interacting with the detector. In addition, the anisotropic nature of n-d scattering as compared to the isotropic n-p scattering allows for the determination of the neutron energy spectrum directly from the pulse-height spectrum, complementing the time-of-flight (TOF) information. The installation of GRIFFIN is under way and first experiments are planned for the fall of 2014. The array will be completed in 2015 with the full complement of 16 clovers. DESCANT will be tested coupled with GRIFFIN in spring of 2015.

Michael Griffin Senate Confirmation Hearing

NASA Image and Video Library

2005-04-12

U.S. Senator Daniel K. Inouye, D-Hawaii, left, speaks as U.S. Senator Ted Stevens, R-Alaska, looks on during the confirmation hearing for Dr. Michael Griffin, in front of the U.S. Senate Commerce Committee, Tuesday, April 12, 2005, in Washington. If confirmed, Griffin, who currently heads the space department at the Johns Hopkins University Applied Physics Laboratory will become NASA's 11th administrator. Photo Credit (NASA/Renee Bouchard)

A resolution acknowledging the lifelong service of Griffin Boyette Bell, a legal icon, to the State of Georgia and to the United States.

THOMAS, 111th Congress

Sen. Chambliss, Saxby [R-GA

2009-01-16

Senate - 01/16/2009 Submitted in the Senate, considered, and agreed to without amendment and with a preamble by Unanimous Consent. (All Actions) Tracker: This bill has the status Agreed to in SenateHere are the steps for Status of Legislation:

ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: STORMWATER SOURCE AREA TREATMENT DEVICE — BAYSAVER TECHNOLOGIES, INC. BAYSAVER SEPARATION SYSTEM, MODEL 10K

EPA Science Inventory

Verification testing of the BaySaver Separation System, Model 10K was conducted on a 10 acre drainage basin near downtown Griffin, Georgia. The system consists of two water tight pre-cast concrete manholes and a high-density polyethylene BaySaver Separator Unit. The BaySaver Mod...

36 CFR Appendix A to Part 1275 - Settlement Agreement

Code of Federal Regulations, 2014 CFR

2014-07-01

..., Archivist of the United States, and William E. Griffin and John H. Taylor, Co-executors of Richard M. Nixon... estate of Richard M. Nixon (“the Nixon estate”), in the above-entitled action by and through the parties... segments of tape recordings made during the Presidency of Richard M. Nixon (“tape recordings” or “tapes...

STS-114: Discovery Launch Readiness Press Conference

NASA Technical Reports Server (NTRS)

2005-01-01

Michael Griffin, NASA Administrator; Wayne Hale, Space Shuttle Deputy Program Manager; Mike Wetmore, Director of Shuttle Processing; and 1st Lieutenant Mindy Chavez, Launch Weather Officer-United States Air Force 45th Weather Squadron are in attendance for this STS-114 Discovery launch readiness press conference. The discussion begins with Wayne Hale bringing to the table a low level sensor device for everyone to view. He talks in detail about all of the extensive tests that were performed on these sensors and the completion of these ambient tests. Chavez presents her weather forecast for the launch day of July 26th 2005. Michael Griffin and Wayne Hale answer questions from the news media pertaining to the sensors and launch readiness. The video ends with footage of Pilot Jim Kelly and Commander Eileen Collins conducting test flights in a Shuttle Training Aircraft (STA) that simulates Space Shuttle landing.

Michael Griffin House Science Committee Hearing

NASA Image and Video Library

2005-06-27

NASA Administrator Michael Griffin prepares to testify at a hearing before the House Science Committee, Tuesday, June 28, 2005, Rayburn House Office building, Washington. Photo Credit: (NASA/Bill Ingalls)

Michael Griffin House Science Committee Hearing

NASA Image and Video Library

2005-06-27

Rep. Bart Gordon, D-TN., questions NASA Administrator Michael Griffin during a House Science Committee hearing, Tuesday, June 28, 2005, Rayburn House Office building, Washington. Photo Credit: (NASA/Bill Ingalls)

Michael Griffin House Science Committee Hearing

NASA Image and Video Library

2005-06-27

Members of the media photograph NASA Administrator Michael Griffin as he testifies at a hearing before the House Science Committee, Tuesday, June 28, 2005, Rayburn House Office building, Washington. Photo Credit: (NASA/Bill Ingalls)

5. ROOFTOPS, ISHERWOOD HALL (BUILDING NO. 104), GRIFFIN (BUILDING NO. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. ROOFTOPS, ISHERWOOD HALL (BUILDING NO. 104), GRIFFIN (BUILDING NO. 110), MELVILLE HALL (BUILDING NO. 116) LOOKING WEST FROM CLOCK TOWER OF MAHAN HALL - U.S. Naval Academy, Annapolis, Anne Arundel County, MD

Organization as Information Processing Systems. Toward a Model of the Research Factors Associated with Significant Research Outcomes.

DTIC Science & Technology

1986-04-01

of Management DT1, Texas A&M University E LE C I - "-MAY 27 M6 Richard Daft and * E Ricky Griffin r|DJ rEN . T 1o SltM - t Principal Investigators...Department of Management College of Business Administration Texas A&M University College Station, TX 77843 TR-ONR-DG-01 Joe Thomas and Ricky W. Griffin...and Use of Formal Control Systems for Management Control and Strategy Implementation. February 1984. TR-ONR-DG-07 Thomas Head, Ricky W. Griffin, and

13. Detail of vestibule, or main entrance, showing lamp and ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

13. Detail of vestibule, or main entrance, showing lamp and eastern set of doors. (Sept. 1991) The other sides of these doors are seen from the inside in WA-197-14. The 'ghosts' of ornamental wooden griffins can be seen above the doors. These griffins were stolen shortly after protective plywood doors were removed on Sept. 6, 1991 in preparation for the public auction on Sept. 10. At the time of the theft, the griffins had not yet been photographed. - Fox Theater, Seventh Avenue & Olive Way, Seattle, King County, WA

GRIFFIN: A versatile methodology for optimization of protein-lipid interfaces for membrane protein simulations

PubMed Central

Staritzbichler, René; Anselmi, Claudio; Forrest, Lucy R.; Faraldo-Gómez, José D.

2014-01-01

As new atomic structures of membrane proteins are resolved, they reveal increasingly complex transmembrane topologies, and highly irregular surfaces with crevices and pores. In many cases, specific interactions formed with the lipid membrane are functionally crucial, as is the overall lipid composition. Compounded with increasing protein size, these characteristics pose a challenge for the construction of simulation models of membrane proteins in lipid environments; clearly, that these models are sufficiently realistic bears upon the reliability of simulation-based studies of these systems. Here, we introduce GRIFFIN, which uses a versatile framework to automate and improve a widely-used membrane-embedding protocol. Initially, GRIFFIN carves out lipid and water molecules from a volume equivalent to that of the protein, so as to conserve the system density. In the subsequent optimization phase GRIFFIN adds an implicit grid-based protein force-field to a molecular dynamics simulation of the pre-carved membrane. In this force-field, atoms inside the implicit protein volume experience an outward force that will expel them from that volume, whereas those outside are subject to electrostatic and van-der-Waals interactions with the implicit protein. At each step of the simulation, these forces are updated by GRIFFIN and combined with the intermolecular forces of the explicit lipid-water system. This procedure enables the construction of realistic and reproducible starting configurations of the protein-membrane interface within a reasonable timeframe and with minimal intervention. GRIFFIN is a standalone tool designed to work alongside any existing molecular dynamics package, such as NAMD or GROMACS. PMID:24707227

Michael Griffin Oath Of Office

NASA Image and Video Library

2005-04-14

John H. Marburger, Science Adviser to the President and Director of the Office of Science and Technology Policy (OSTP), left, shakes hands with NASA Administrator Michael Griffin following his swearing-in, Thursday, April 14, 2005, in Washington. Photo Credit: (NASA/Renee Bouchard)

β-DECAY Studies at Triumf and Future Opportunities with Griffin

NASA Astrophysics Data System (ADS)

Garnsworthy, A. B.; Ball, G. C.; Bender, P. C.; Churchman, R.; Close, A.; Glister, J.; Hackman, G.; Ketelhut, S.; Krücken, R.; Sjue, S. K. L.; Tardiff, E.; Garrett, P. E.; Demand, G. A.; Dunlop, R.; Finlay, P.; Hadinia, B.; Leach, K.; Michetti-Wilson, J.; Rand, E. T.; Svensson, C. E.; Andreoiu, C.; Ashley, R.; Chester, A.; Cross, D.; Starosta, K.; Wang, Z.; Zganjar, E. F.

2013-03-01

The 8π spectrometer at TRIUMF-ISAC-I and a powerful suite of ancillary detectors support a wide program of research in the fields of nuclear structure, nuclear astrophysics and fundamental symmetries with low-energy radioactive beams.Work is underway to upgrade the Ge detectors and DAQ aspects of the facility to a new state-of-the-art γ-ray spectrometer, GRIFFIN, which will become operational in 2014. GRIFFIN will constitute an increase in the γ-γ efficiency of close to a factor of 300 over the current setup and extend the capabilities for investigations of exotic nuclei produced at ISAC.

Proceedings of the Annual Meeting of the Association for Education in Journalism and Mass Communication (74th, Boston, Massachusetts, August 7-10, 1991). Part IX: International Media.

ERIC Educational Resources Information Center

Association for Education in Journalism and Mass Communication.

The International Media section of the proceedings contains the following 17 papers: "West German Media Coverage of the United States and Soviet Union, 1983-1988" (Jeffrey L. Griffin); "Shakti: The Power of the Mother. The Violent Nurturer in Ancient Indian Text and Modern Commercial Cinema" (Jawahara K. Saidulla);…

Michael Griffin Meets with Elon Musk

NASA Image and Video Library

2005-04-19

NASA Administrator Michael Griffin, left, meets with CEO of SpaceX Elon Musk, right, Wednesday, April 20, 2005 at NASA Headquarters in Washington. Looking on in the background are Larry Williams, NASA astronaut Marsha Ivins and NASA manager Christopher Shank. Photo Credit: (NASA/Renee Bouchard)

Michael Griffin Senate Hearing

NASA Image and Video Library

2005-05-17

NASA Administrator Dr. Michael Griffin speaks in front of the Senate Commerce Committee Science and Space Subcommittee hearing on Human Space Flight: The Space Shuttle and Beyond, Wednesday, May 18, 2005, in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Bill Ingalls)

Seasonal Population Dynamics of Megacopta cribraria (Hemiptera: Plataspidae) in Kudzu and Soybean, and Implication for Insecticidal Management in Soybean.

PubMed

Blount, J L; Roberts, P M; Toews, M D; Gardner, W A; Buntin, G D; Davis, J W; All, J N

2017-02-01

Megacopta cribraria (F.), an invasive species introduced from Asia in 2009, is now prolific in the southeastern United States. Megacopta cribraria develops primarily on kudzu and soybean completing two generations. It is not well understood how this economic pest is affected by changes in geographic distribution in the United States or how population levels have changed since its establishment. The effect of insecticide application timing on field populations of M. cribraria is not well documented. These studies seek to understand how population dynamics of M. cribraria vary with geographic regions in Georgia. Effect of application timing on populations throughout the growing season was also examined. Weekly from 2012 to 2013, all life stages were enumerated from kudzu and soybean environments at several locations throughout Georgia from sweeps samples and flight intercept captures. Coordinates were recorded for locations, and classified as belonging to the Piedmont or Coastal Plain region of the state. Single spray trials were conducted from 2011-2014, and applications were made to soybean at intervals throughout the season. From 2012 to 2015, two kudzu patches near Griffin, GA, were monitored to detect population changes. Differences in population dynamics from locations around the state were found, but no clear effect of latitude, longitude, or region was observed. Insecticide applications applied in July suppressed nymph populations significantly better than treatments made earlier or later. Megacopta cribraria populations declined in 2014 and 2015 compared with 2012 and 2013. These studies provide the critical information for M. cribraria management in soybean in the southeastern United States. © The Authors 2016. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

Contaminants in American alligator eggs from Lake Apopka, Lake Griffin, and Lake Okeechobee, Florida

USGS Publications Warehouse

Heinz, Gary H.; Percival, H. Franklin; Jennings, Michael L.

1991-01-01

Residues of organochlorine pesticides, polychlorinated biphenyls (PCBs), and 16 elements were measured in American alligator (Alligator mississippiensis) eggs collected in 1984 from Lakes Apopka, Griffin, and Okeechobee in central and south Florida. Organochlorine pesticides were highest in eggs from Lake Apopka. None of the elements appeared to be present at harmful concentrations in eggs from any of the lakes. A larger sample of eggs was collected in 1985, but only from Lakes Griffin, a lake where eggs were relatively clean, and Apopka, where eggs were most contaminated. In 1985, hatching success of artificially incubated eggs was lower for Lake Apopka, and several organochlorine pesticides were higher than in eggs from Lake Griffin. However, within Lake Apopka, higher levels of pesticides in chemically analyzed eggs were not associated with reduced hatching success of the remaining eggs in the clutch. Therefore, it did not appear that any of the pesticides we measured were responsible for the reduced hatching success of Lake Apopka eggs.

75 FR 5015 - Television Broadcasting Services; Oklahoma City, OK

Federal Register 2010, 2011, 2012, 2013, 2014

2010-02-01

...] Television Broadcasting Services; Oklahoma City, OK AGENCY: Federal Communications Commission. ACTION..., L.L.C. (``Griffin''), the licensee of KWTV-DT, channel 9, Oklahoma City, Oklahoma. Griffin requests the substitution of channel 39 for channel 9 at Oklahoma City. DATES: Comments must be filed on or...

Michael Griffin Senate Hearing

NASA Image and Video Library

2005-05-17

NASA Administrator Dr. Michael Griffin is seen during his appearance in front of the Senate Commerce Committee Science and Space Subcommittee hearing on Human Space Flight: The Space Shuttle and Beyond, Wednesday, May 18, 2005, in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Bill Ingalls)

Michael Griffin Senate Hearing

NASA Image and Video Library

2005-05-17

NASA Administrator Dr. Michael Griffin smiles during his appearance in front of the Senate Commerce Committee Science and Space Subcommittee hearing on Human Space Flight: The Space Shuttle and Beyond, Wednesday, May 18, 2005, in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Bill Ingalls)

Michael Griffin Senate Hearing

NASA Image and Video Library

2005-05-17

NASA Administrator Dr. Michael Griffin delivers a statement during testimony in front of the Senate Commerce Committee Science and Space Subcommittee hearing on Human Space Flight: The Space Shuttle and Beyond, Wednesday, May 18, 2005, in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Bill Ingalls)

A New Agenda for Educational Equity. Education in a Changing South: New Policies, Patterns and Programs. Report on the Annual Continuing Conference (9th, Atlanta, Georgia, November 5-7, 1991).

ERIC Educational Resources Information Center

Southern Education Foundation, Atlanta, GA.

This publication presents the proceedings of a conference on African Americans and educational equity in the southern United States. A brief overview opens the publication followed by information on Jean Fairfax, recipient at the conference of the John A. Griffin Award for Advancing Equity in Education. Other presentations are included as follows:…

Hazardous Waste Cleanup: GPP-Florence, L.L.C. in Florence, New Jersey

EPA Pesticide Factsheets

Former Griffin Pipe Products Company is located at 1100 West Front Street in Florence, New Jersey. The 293-acre Griffin Pipe Products Company site has been operating as a foundry since the early 1900's, when it was known as the Florence Pipe and Foundry Co

Michael Griffin Oath Of Office

NASA Image and Video Library

2005-04-14

John H. Marburger, Science Adviser to the President and Director of the Office of Science and Technology Policy (OSTP), left, talks with NASA Administrator Michael Griffin, center, while his wife Rebecca and daughter Katie look on following his swearing-in, Thursday, April 14, 2005, in Washington. Photo Credit: (NASA/Renee Bouchard)

Michael Griffin Senate Hearing

NASA Image and Video Library

2005-05-17

Senator Trent Lott, R-Miss., questions NASA Administrator Dr. Michael Griffin during his appearance in front of the Senate Commerce Committee Science and Space Subcommittee hearing on Human Space Flight: The Space Shuttle and Beyond, Wednesday, May 18, 2005, in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Bill Ingalls)

Michael Griffin Senate Hearing

NASA Image and Video Library

2005-05-17

NASA Administrator Dr. Michael Griffin is seen prior to his appearance in front of the Senate Commerce Committee Science and Space Subcommittee hearing on Human Space Flight: The Space Shuttle and Beyond, Wednesday, May 18, 2005, in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Bill Ingalls)

Systems 2020

DTIC Science & Technology

2012-03-22

USC Team Members: SERC Research Council Dr. Abhi Deshmukh , Purdue Dr. Michael Griffin. U. Alabama-Huntsville Dr. Barry Horowitz, U. Virginia Dr...Areas ................................................. 34 3.2.1 Affordability, Agility, and Resilience (Barry Boehm and Abhi Deshmukh , Leads...statement was reinterpreted to involve the SERC Research Council (Drs. Deshmukh , Griffin, Horowitz, Rouse, and Wade, with Dr. Boehm as chair) in defining

Use of Word Length Information in Utterance Planning

ERIC Educational Resources Information Center

Meyer, Antje S.; Belke, Eva; Hacker, Christine; Mortensen, Linda

2007-01-01

Griffin [Griffin, Z. M. (2003). "A reversed length effect in coordinating the preparation and articulation of words in speaking." "Psychonomic Bulletin & Review," 10, 603-609.] found that speakers naming object pairs spent more time before utterance onset looking at the second object when the first object name was short than when it was long. She…

Some recollections of D. R. Griffin as a young man

NASA Astrophysics Data System (ADS)

Galambos, Robert

2004-05-01

In 1939 Don Griffin invited me to join him in his earliest bat echolocation experiments. I will tell a few stories about what we two graduate students did together, and show the sound movie in which, for the first time, we recorded their cries as they flew and avoided obstacles.

Michael Griffin Senate Hearing

NASA Image and Video Library

2005-05-17

U.S. Senator Bill Nelson. R-Fla., questions NASA Administrator Dr. Michael Griffin during his appearance in front of the Senate Commerce Committee Science and Space Subcommittee hearing on Human Space Flight: The Space Shuttle and Beyond, Wednesday, May 18, 2005, in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Bill Ingalls)

Griffin Lifts Off at NASA With Calls for Speeding Shuttle Replacement, Reopening Hubble Decision

NASA Technical Reports Server (NTRS)

Morring, Frank, Jr.

2005-01-01

Michael D. Griffin launched his tenure as NASA's 11th administrator on a fast track, using his "emergency" confiimation by the U.S. Senate to plug himself into space shuttle return-to-flight decision-making and urging faster development of the shuttle replacement. He also deftly sidestepped the treacherous issue of letting the aging Hubble Space Telescope die that was left behind by former Administrator Sean O'Keefe. Griffin told the Senate Commerce, Science and Transportation Committee that he would take another look at a shuttle mission to service the telescope, but not until the redesigned shuttle system makes a couple of test flights. Griffin made clear at his confirmation hearing Apr. 12 that he has long supported the ideas embodied in President Bush s push to move human exploration out of low Earth orbit, while finishing the International Space Station and retiring the space shuttle as soon as possible. And he showed right out of the blocks that his technical training and management background should serve him well in implementing Bush's directives.

Young People Drawn to Aid in 2008 Race

ERIC Educational Resources Information Center

Klein, Alyson

2008-01-01

The scene in Brian Griffin's bedroom looks like a cross between a charity telethon and an intense cramming session the night before a final exam. Mr. Griffin and about 10 of his classmates--fellow members of the Plainfield High School (Indiana) chapter of Students for Barack Obama--are sprawled around the room, cellphones in hand, studying voter…

75 FR 11899 - Certificate of Alternative Compliance for the Offshore Supply Vessel JOE GRIFFIN

Federal Register 2010, 2011, 2012, 2013, 2014

2010-03-12

... ``Search.'' FOR FURTHER INFORMATION CONTACT: If you have questions on this notice, call CWO2 David Mauldin, District Eight, Prevention Branch, U.S. Coast Guard, telephone 504-671-2153. If you have questions on... for the offshore supply vessel JOE GRIFFIN. Full compliance with 72 COLREGS and the Inland Rules Act...

Michael Griffin Oath Of Office

NASA Image and Video Library

2005-04-14

NASA Administrator Michael Griffin, left, is administered the oath of office by John H. Marburger, right, Science Adviser to the President and Office of Science and Technology Policy Director, during a private ceremony at the Old Executive Office Building, Thursday, April 14, 2005, in Washington, while his wife Rebecca and daughter Katie look on. Photo Credit: (NASA/Renee Bouchard)

Re-Establishing Social Studies as a Core Subject: An Interview with Susan Griffin

ERIC Educational Resources Information Center

Griffin, Susan

2014-01-01

NCSS Executive Director Susan Griffin was chair of the Task Force of Professional Organizations that worked with the Social Studies Assessment, Curriculum, and Instruction Collaborative (SSACI) of the Council of Chief State School Officers to initiate and guide the development of the "College, Career and Civic Life (C3) Framework for Social…

Michael Griffin Discusses Exploration Architecture Study

NASA Image and Video Library

2005-09-18

NASA Administrator Michael Griffin discusses the results of the agency's exploration architecture study on Monday, Sept. 19, 2005, at NASA Headquarters in Washington. The study made specific design recommendations for a vehicle to carry crews into space, a family of launch vehicles to take missions to the moon and beyond, and a "lunar mission architecture" for landing on the moon. Photo Credit: (NASA/Bill Ingalls)

78 FR 29200 - In the Matter of Griffin Mining, Inc., Power Sports Factory, Inc., Star Energy Corp., TransNet...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-17

... SECURITIES AND EXCHANGE COMMISSION [File No. 500-1] In the Matter of Griffin Mining, Inc., Power Sports Factory, Inc., Star Energy Corp., TransNet Corp., Valcom, Inc., and Vibe Records, Inc.; Order of... information concerning the securities of Power Sports Factory, Inc. because it has not filed any periodic...

Draft genome sequence of Xylella fastidiosa supsp. multiplex strain Griffin-1 from Quercus rubra in Georgia

USDA-ARS?s Scientific Manuscript database

The draft genome sequence of Xylella fastidiosa subsp. multiplex Strain Griffin-1 isolated from a red oak tree (Quercus rubra) in Georgia, U.S.A. is reported. The bacterium has a genome size of 2,387,314 bp with 51.7% G+C content and comprises 2,903 predicted open reading frames (ORFs), and 50 RNA g...

Elemental Levels Analyzed by PIXE in Florida Alligators

NASA Astrophysics Data System (ADS)

Kuharik, J. C.; Kravchenko, I. I.; Dunnam, F. E.; Van Rinsvelt, H. A.; Ross, J. P.

2003-08-01

Unusual and alarming mortality of alligators (Alligator mississippiensis) has been reported from Lake Griffin, Florida, where almost 400 dead alligators have been observed since 1997. In addition, the hatch rate for alligator eggs around Lake Griffin fell below 10% and remains low (30-45%) while the normal hatch rate is typically 80%. Standard diagnostic methods have been ineffective in determining the cause of the phenomenon. Many possibilities have been considered including pollutants, nutrition, and toxic algae. Particle Induced X-ray Emission (PIXE) analysis is highly suitable for investigating concentrations of a wide range of elements in animal tissue. Liver, kidney and spinal cord tissues from healthy and sick alligators have been analyzed by PIXE for elemental content. Initial results showed positive correlation between certain elements and neural impairment and morbidity of alligators in Lake Griffin, but have failed to prove significant.

The Landrum-Griffin Act. Twenty Years of Federal Protection of Union Members' Rights. Labor Relations and Public Policy Series, No. 19.

ERIC Educational Resources Information Center

Bellace, Janice R.; Berkowitz, Alan D.

Enacted in 1959, the Landrum-Griffin Act or Labor-Management Reporting and Disclosure Act was intended to attain maximum protection for the rights of individual workers within the union without undermining the union as an institution necessary for the existence of collective bargaining. Title I is the union members' bill of rights; titles II-VI…

A Heuristic FORTRAN Model of the Identification and Allocation of CONUS (Continental United States) Prime BEEF (Base Engineer Emergency Forces) Forces in Support of Theater OPlan (Operation Plan) Requirements.

DTIC Science & Technology

1983-09-01

and status systems (Albanese, 1981; Griffin, 1982; Lott & Lott, 1971). Group cohesiveness and norms, according to Wallace and Szilagyi (1982), were the... Wallace & Szilagyi , 1982): 1. The major difference between high and low cohesive groups would be how closely members conform to group norms ; and 2. Group...performance would be influenced not only by cohesiveness, but also by the level or strength of group norms. Research by Wallace and Szilagyi (1982

Granulocyte-Macrophage Colony-Stimulating Factor: More Than a Hemopoietin

DTIC Science & Technology

1990-01-01

Sullivan, R., Elias, A., Antman , K.. Schnipper, L.. and Griffin, D., Granulocyte-macrophage colony-stimulating factor induces the expression of the CDI lb...surface adhesion molecule on human granulocytes in vivo. Blood 72, 691--697, 1988. 38. Socinski, M. A., Cannistra, S., Elias, A., Antman , K. H...1989. 82. Antman , K.. Griffin, J., Elias, A., Socinski. M., Ryan, L., Cannistra, S., Gette, D., Whitly, M., Frei, E., and Schnipper, L., Effect of

Gizzard shad thiaminase activity and its effect on the thiamine status of captive American alligators Alligator mississippiensis.

PubMed

Ross, J Perran; Honeyfield, Dale C; Brown, Scott B; Brown, Lisa R; Waddle, Amanda Rice; Welker, Michael E; Schoeb, Trenton R

2009-12-01

Adult mortality and low egg hatch rate were observed among American alligators Alligator mississippiensis in Lake Griffin, Florida, between 1998 and 2003. Previous studies show that the alligator mortality is due to neurological impairment associated with thiamine (vitamin Bt) deficiency. This study determined the rate of thiaminase activity in gizzard shad Dorosoma cepedianum, a fish often eaten by alligators, and examined the thiamine status of captive adult alligators fed only gizzard shad. We found that the thiaminase activity of gizzard shad in Lake Griffin is 16,409 +/- 2,121 pmol/g/min (mean +/- 2SEs). This high rate of thiaminase activity was present in most months and across a wide range of shad sizes. Seven alligators were captured in the wild from Lake Griffin and Lake Woodruff, held in captivity, and fed gizzard shad. We monitored blood and muscle thiamine levels throughout the experiment and liver thiamine at the end. Over a period of 6-12 months, all of the alligators maintained weight but blood and muscle thiamine levels decreased to 25-50% of the original (healthy) values. Three animals with the greatest reduction in thiamine died, demonstrating mobility impairment and neural histopathology similar to those seen in wild alligators in Lake Griffin. Two alligators were fed shad for 10 months but then treated with thiamine. These animals showed a reduction in thiamine while eating shad, but treatment restored their thiamine levels to the initial values, which were comparable to those of normal wild Lake Griffin alligators. We demonstrated that thiamine deficiency can be induced by a diet of gizzard shad and cause neurological signs and death in alligators in captivity. We conclude that the thiaminase activity in gizzard shad is high enough to cause thiamine deficiency in wild alligators when shad are a major part of their diet.

View of activity in Mission Control Center during Apollo 15 EVA

NASA Image and Video Library

1971-08-02

S71-41852 (2 Aug. 1971) --- Gerald D. Griffin, foreground, stands near his console in the Mission Operations Control Room (MOCR) during Apollo 15's third extravehicular activity (EVA) on the lunar surface. Griffin is Gold Team (Shift 1) flight director for the Apollo 15 mission. Astronauts David R. Scott and James B. Irwin can be seen on the large screen at the front of the MOCR as they participate in sample-gathering on the lunar surface.

Constellation Program Update

NASA Image and Video Library

2006-06-04

NASA Administrator Michael Griffin is seen through a television camera at a NASA Update announcing to NASA employees and members of the media the responsibilities of the NASA centers associated with the Constellation Program for robotic and human Moon and Mars exploration on Wednesday, June 5, 2006, at NASA Headquarters in Washington. Griffin was joined by Scott J. Horowitz, NASA Associate Administrator for Exploration Systems and Jeff Hanley, Constellation Program Manager, right. Dean Acosta, NASA Deputy Assistant Administrator and Press Secretary, far left, moderates the program. Photo Credit: (NASA/Bill Ingalls)

Griffin 2.0 - Development and Evaluation of an Occupant Protection Platform with Active-Blast Mitigation and Crew Floor Isolation

DTIC Science & Technology

2016-11-15

and they include 1) threat size, 2) threat burial depth, 3) soil composition, 4) vehicle standoff, 5) hull geometry, and 6) vehicle mass. However...crucial in engaging as much of the mass as possible. Another feature of the Griffin architecture is the continuous monocoque hull design that...underbody threats up to 200% MRAP Objective (Pratt & Miller Engineering, 2015). Next a low-deformation hull needs to be utilized that will

STS-6 MISSION OPERATIONS CONTROL ROOM (MOCR) ACTIVITIES - DAY 5 - JSC

NASA Image and Video Library

1983-04-09

Various views of STS-6 MOCR activities during Day-5 with Vice-Pres. George Bush, Cap Communicator Bridges, JSC Director Gerald Griffin, Eugene F. Kranz, NASA Admin. James M. Beggs, Cap Com Astronaut O'Connor, Flight Directors Jay H. Greene, Gary E. Coen, and Harold Draughon. 1. BUSH, GEORGE, VICE-PRES. - STS-6 MOCR 2. DIR. GRIFFIN, GERALD D. - STS-6 MOCR 3. ADMIN. BEGGS, JAMES M. - STS-6 MOCR 4. FLT. DIRECTORS - STS-6 JSC, HOUSTON, TX Also available in 35 CN

A Proposed Integration among Organizational Information Requirements, Media Richness and Structural Design.

DTIC Science & Technology

1984-11-01

34 ’-" " " ’ " " . 2:;.- " 2 ’. - - . *" " 9 0 .0 o A Proposed Integration Among Organizational Information Requirements, Media Richness and Structural...Business Administration Texas A&M University " College Station, TX 77843 0 TR-ONR-DG-01 Joe Thomas and Ricky W. Griffin. The Social Information...Approach to Managerial Behavior and Organization Design. May 1983. TR-ONR-DC-03 Ricky W. Griffin, Thomas S. Bateman, and James Skivington. Social Cues

Flow-Induced Oscillations of OTEC Mooring and Anchoring Cables: State of the Art.

DTIC Science & Technology

1982-05-27

general, including heat exchangers , overhead transmission lines, and marine structures and cables. A flowchart that describes the steps necessary to...34Crossflow-Induced Vibrations of Heat Exchanger Tube Banks," Nuc. Engrg. and Design, Vol. 47, 67-86, 1978. 22. O.M. Griffin and S.E. Ramberg, "On...AD-AIlS 462 NAVAL RESEARCH LAB WASHINGTON DC F/6 13/13 FLOW-INOUCED OSCILLATIONS OF OTEC MOORING AND ANCHORING CABLES --ETC(UI MAY 62 0 M GRIFFIN

Heart Rate Variability in Patients Being Treated for Dengue Viral Infection: New Insights from Mathematical Correction of Heart Rate

DTIC Science & Technology

2014-02-25

prognosis of viral infections, particu- larly in neonates and infants at risk of developing septic shock (Griffin and Moorman, 2001; Griffin et al...2004, 2005). In their studies, it was reported that abnormal HR with reduced variabil- ity and transient decelerations preceded neonatal /infant sepsis...hospital resuscitative treatment in DHF patients. After correction for prevailing HR, LF variability was still significantly increased (both P < 0.01) on day

NASA Agency Overview Briefing

NASA Technical Reports Server (NTRS)

2006-01-01

The briefing opened with Dean Acosta (NASA Press Secretary) introducing Michael Griffin (NASA Administrator) and Bill Gerstenmaier (Associate Administrator for Space Operations). Bill Griffin stated that they would resume the Shuttle Fight to Return process, that the vehicle was remarkably clean and if the weather was good, the Shuttle would be ready to launch as scheduled. Bill Gerstenmaier stated that the preparations and processing of the vehicle went extremely well and they are looking forward to increasing the crew size to three. Then the floor was open to questions from the press.

Fiscal Year 2007 Budget Press Conference

NASA Image and Video Library

2006-02-06

NASA Administrator Michael Griffin outlines the President's budget for fiscal year 2007 during a news conference, Monday, Feb. 6, 2006, at NASA Headquarters in Washington. Griffin was joined by the heads of NASA's four mission directorates to explain how the proposed $16.8 billion dollar budget supports the Vision for Space Exploration. Seated left to right: Scott Horowitz, NASA Associate Administrator for Exploration Systems, William Gerstenmaier, NASA Associate Administrator for Space Operations, Lisa Porter, NASA Associate Administrator for Aeronautics Research and Mary Cleave, NASA Associate Administrator for Science. Photo Credit: (NASA/Bill Ingalls)

Effect of sunn hemp (Crotalaria juncea L.) cutting date and planting density on weed suppression in Georgia, USA.

PubMed

Morris, J Bradley; Chase, Carlene; Treadwell, Danielle; Koenig, Rosie; Cho, Alyssa; Morales-Payan, Jose Pable; Murphy, Tim; Antonious, George F

2015-01-01

A field study was conducted in 2008 and 2009 at the USDA, ARS, Plant Genetic Resources Conservation Unit in Griffin, GA, to investigate weed suppression by sunn hemp (Crotalaria juncea L). The objectives were to (1) evaluate the effects of apical meristem removal (AMR) at three dates [5, 6, and 7 wks after planting (WAP) on May 14, 2008 and May 21, 2009] and (2) assess the impact of seeding rates (11, 28, and 45 kg ha(-1)) on weed biomass reduction. Weed species were identified at 4, 8, and 12 wks after sunn hemp planting. Sunn hemp cutting date had no significant effect on weed suppression in 2008 but significant differences for grass weeds at 4, 8, and 12 WAP and for yellow nutsedge at 8 and 12 WAP did occur when compared to the control in 2009. In comparison to the sunn hemp-free control plot in 2009, all three seeding rates had reduced grass weed dry weights at 4, 8, and 12 WAP. The total mass of yellow nutsedge when grown with sunn hemp was reduced compared to the total mass of yellow nutsedge grown in the weedy check for all seeding rates at 8 and 12 WAP. Lower grass weed biomass was observed by 12 WAP for cutting dates and seeding rates during 2008 and 2009. Sunn hemp cutting date and seeding rate reduced branch numbers in both years. The reduction in sunn hemp seeding rates revealed a decrease in weed populations.

Pathology, physiologic parameters, tissue contaminants, and tissue thiamine in morbid and healthy central Florida adult American alligators (Alligator mississippiensis)

USGS Publications Warehouse

Honeyfield, D.C.; Ross, J.P.; Carbonneau, D.A.; Terrell, S.P.; Woodward, A.R.; Schoeb, T.R.; Perceval, H.F.; Hinterkopf, J.P.

2008-01-01

An investigation of adult alligator (Alligator mississippiensis) mortalities in Lake Griffin, central Florida, was conducted from 1998-2004. Alligator mortality was highest in the months of April and May and annual death count peaked in 2000. Bacterial pathogens, heavy metals, and pesticides were not linked with the mortalities. Blood chemistry did not point to any clinical diagnosis, although differences between impaired and normal animals were noted. Captured alligators with signs of neurologic impairment displayed unresponsive and uncoordinated behavior. Three of 21 impaired Lake Griffin alligators were found to have neural lesions characteristic of thiamine deficiency in the telencephalon, particularly the dorsal ventricular ridge. In some cases, lesions were found in the thalamus, and parts of the midbrain. Liver and muscle tissue concentrations of thiamine (vitamin B"1) were lowest in impaired Lake Griffin alligators when compared to unimpaired alligators or to alligators from Lake Woodruff. The consumption of thiaminase-positive gizzard shad (Dorosoma cepedianum) is thought to have been the cause of the low tissue thiamine and resulting mortalities. ?? Wildlife Disease Association 2008.

48 CFR 1631.203-71 - Business unit General and Administrative (G&A) expenses.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Business unit General and Administrative (G&A) expenses. G&A expenses shall be allocated to final cost... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Business unit General and Administrative (G&A) expenses. 1631.203-71 Section 1631.203-71 Federal Acquisition Regulations System OFFICE OF...

Controls Over Materiel Procured for Direct Vendor Delivery

DTIC Science & Technology

1995-02-10

National Guard, Company D, 560th Engineer Battalion, Bainbridge, GA Army National Guard, Company E, 121st Infantry Battalion, Tifton , GA Joint...Command, Fort Monmouth, NJ United States Army Forces Command, Atlanta, GA United States Army Materiel Command, Alexandria, VA United States Army...Fort Gillem, GA Headquarters, Fort Lee, Petersburg, VA Headquarters, Fort Riley, KS Headquarters, National Guard Bureau, Washington, DC Headquarters

Effect of Planting Date and Maturity Group on Soybean Yield Response to Injury by Megacopta cribraria (Hemiptera: Plataspidae).

PubMed

Blount, J L; Buntin, G D; Roberts, P M

2016-02-01

The kudzu bug, Megacopta cribraria (F.), is an invasive member of the family Plataspidae originating from Asia. Since its discovery in Georgia in 2009, its distribution has increased to 13 southern and eastern states. In the United States, M. cribraria is bivoltine and has two primary developmental hosts, kudzu and soybean. Here, we evaluated the yield response of soybean to M. cribraria feeding injury in relation to planting date and soybean maturity group. The study contained four replicated trials in Griffin, Tifton, and Midville, GA, in 2012 and 2013. Four planting dates from April to July, served as the whole plot of a split-plot design with maturity group five and seven soybean and insecticide (lambda-cyhalothrin) randomized within planting date. Egg masses, nymphs, and adults were enumerated weekly to biweekly until soybean reached maturity. Two generations were observed in April and May plantings, but only one generation was evident in June and July soybean plantings. Insecticide-protected plots had consistently higher yields than unprotected plots. Grain yield was greatest in the May planting and lowest in the July planting. Season-long feeding by M. cribraria reduced grain yield in April, May, and June plantings but not in the July planting. Maturity group and planting date had significant effects on yield components in most comparisons. This study indicated that early-planted soybean are at greater risk of yield loss from M. cribraria injury compared with later-planted soybean. © The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

Multi-stage accretion of high pressure rocks and thermal changes in a subduction channel: evidence from Diego de Almagro Island (Chilean Patagonia)

NASA Astrophysics Data System (ADS)

Hyppolito, Thais; Angiboust, Samuel; Juliani, Caetano; Glodny, Johannes; Garcia-Casco, Antonio; Calderon, Mauricio; Chopin, Christian

2016-04-01

The remote Diego de Almagro Island, Chile (51° 30' S) exposes one of the rare vestiges of the Cretaceous paleo-subduction system of western South America. It is constituted by two main tectonic units formed by mafic rocks and metasediments: the high temperature/middle pressure Lázaro unit to the East and the high pressure-low temperature Almagro Complex to the West. We herein focus on the Almagro Complex, a pluri-kilometer thick subducted sequence comprising dominantly metatuffs, but also Grt-micaschists, meta-pillow lavas (showing MORB and OIB signatures) and metacherts (transformed to quartz+garnet-rich layers). Despite its apparent homogeneity, the Almagro Complex is actually composed of two distinct units (Willner et al., 2004) with distinct pressure-temperature-time paths. The Garnet Amphibolite unit (GA) shows three chemically and microstructurally distinct garnet generations that grew and (re)-equilibrated between 1.1 GPa and 1.7 GPa (35-55 km) and between 500°C and 600°C. We report for the first time in Chilean Patagonia the presence of rare relicts of omphacite in equilibrium with garnet in mafic layers together with the finding of chloritoid inclusions in garnet from metasediments, and omphacite and glaucophane inclusions in metatuffs. Our P-T estimates, based on pseudosection modeling, single/multi-equilibrium estimates and Raman spectroscopy of organic matter, demonstrate that rocks from the GA unit reached eclogite facies at around 1.7 to 1.8 GPa. Rb-Sr mineral data for Grt-amphibolites indicates that the amphibolitization overprint - which varies in intensity throughout the GA unit - took place at c. 120 Ma. The Blueschist unit, structurally below the GA unit, comprises lithologies similar to the GA unit but finer grained than the former. On other hand, the Blueschist unit (i) does not show garnet with multiple overgrowths and omphacite crystals as seen in the in GA unit; (ii) exhibits slightly lower peak metamorphic conditions than the GA unit (c. 500 °C, 1.4 GPa); (iii) has not suffered the strong amphibolitization visible in the GA unit, and (iv) records blueschist facies deformation at ~80 Ma (Rb-Sr mineral data). Importantly, this cool 80 Ma old event heterogeneously overprinted the GA rocks as shown by silica-rich (Si = 3.5 pfu) rims around phengite (Si = 3.33 pfu) crystals and glaucophane overgrowths around amphibolite-facies hornblende. The amphibolitization stage recorded by GA unit reveals the presence of a transient warming up of the subduction thermal gradient from 9 °C/ km to c. 14 °C/km at c. 120 Ma. We propose that the GA unit has been subsequently cooled down at around 80 Ma coevally with peak metamorphism in the blueschist unit. Dissolution-overgrowth patterns visible in GA unit garnets may be viewed as the record of short-lived thermal pulses associated with discrete basal accretion events. Lately, GA and blueschist units have been tectonically juxtaposed near the root of the accretionary wedge (at c. 30 km depth) and exhumed coherently. Our P-T-t reconstructions for Diego de Almagro rocks bear implications for reconstructing the physical nature of the subduction interface as well as for the understanding of transient, deep accretionary processes taking place near the roots of the seismogenic zone.

The ratio of glycated albumin to hemoglobin A1c measured in IFCC units accurately represents the glycation gap.

PubMed

Akatsuka, Junya; Mochizuki, Mie; Musha, Ikuma; Ohtake, Akira; Kobayashi, Kisho; Kikuchi, Toru; Kikuchi, Nobuyuki; Kawamura, Tomoyuki; Urakami, Tatsuhiko; Sugihara, Shigetaka; Hoshino, Tadao; Amemiya, Shin

2015-01-01

The glycation gap (G-gap: difference between measured hemoglobin A1c [A1C] and the value predicted by its regression on the fructosamine level) is stable and associated with diabetic complications. Measuring A1C level in International Federation of Clinical Chemistry (IFCC) units (A1C-SI; mmol/mol) and National Glycohemoglobin Standardization Program units (A1C-NGSP; %) and using glycated albumin (GA) level instead of fructosamine level for calculating the G-gap, we investigated whether the G-gap is better represented by GA/A1C ratio if expressed in SI units (GA/A1C-SI ratio) rather than in NGSP units (GA/A1C-% ratio). We examined 749 Japanese children with type 1 diabetes using simultaneous GA and A1C measurements. Of these, 369 patients were examined more than five times to assess the consistency of the G-gap and the GA/A1C ratio within individuals. The relationship of GA/A1C-% ratio to the corresponding A1C-NGSP was stronger than that of GA/A1C-SI ratio to A1C-IFCC. At enrollment, the inverse relationship between the GA/A1C-SI ratio and G-gap was highly significant (R(2) = 0.95) compared with that between the GA/A1C-% ratio and G-gap (R(2) = 0.69). A highly significant inverse relationship was also observed between the mean GA/A1C-SI ratio and the mean G-gaps obtained individually over time (R(2) = 0.95) compared with that using the corresponding A1C-NGSP (R(2) = 0.67). We conclude that the G-gap is better represented by the GA/A1C-SI ratio. We propose the use of mean GA/A1C-SI ratios easily obtained individually over time as reference values in Japanese children with type 1 diabetes (6.75 ± 0.60 [means ± SD]).

STS-114: Discovery Impromptu Briefing

NASA Technical Reports Server (NTRS)

2005-01-01

Dr. Griffin, NASA Administrator, is accompanied by members of The U.S. House of Representatives in this STS-114 Discovery Impromptu briefing. The U.S. House of Representatives present include: Sherwood Boehlert, House Science Committee Chairman, Senator Hutchinson, Sheila Jackson, 18th Congressional District Texas, Al Green, 9th Congressional District, Representative Jim Davis, Florida, and Gene Green, 29th District, Texas. Griffin talks about the problem that occurred with the external fuel tank sensor of the Space Shuttle Discovery and the effort NASA is pursuing to track the problem, and identify the root cause. He answers questions from the news media about the next steps for the Space Shuttle Discovery, time frame for the launch, and activities for the astronauts for the next few days.

Game Plan

NASA Technical Reports Server (NTRS)

Morring, Frank, Jr.

2005-01-01

Industry proposals for the Crew Exploration Vehicle that NASA plans as a replacement for the space shuttle are due next week, but the agency's new chief says it might be necessary to slow the CEV procurement at first to speed it up later. After a quick trip to Kennedy Space Center for briefings on getting the space shuttle back in operation, Michael D. Griffin sat down with his growing staff last week to begin work on modifying the CEV procurement. "We are going to rethink our entire program in that area," he said during an inaugural press conference Apr. 18. The proposals due May 2 are being prepared in response to NASA's call for a "risk-reduction flight effort" in 2008 that would lead to delivery of a human-rated CEV in 2014. But Griffin was co-leader on an independent study in 2004 that recommended a way to get the CEV flying astronauts in 2010, the year President Bush has set as a deadline for retiring the space shuttle fleet. In that study, produced for The Planetary Society, Griffin and his team called for development of a 13-15-ton "Block 1" CEV limited to low Earth orbit (LEO) that would be launched atop a single space shuttle solid rocket motor (SRM), with a new cryogenic upper stage based on existing rocket engine technology, Under this approach, NASA would develop a "Block 2" CEV later for human exploration beyond LEO.

Planning applications in east central Florida. [resources management and planning, land use, and lake algal blooms in Brevard County from Skylab imagery

NASA Technical Reports Server (NTRS)

Hannah, J. W.; Thomas, G. L.; Esparza, F. (Principal Investigator)

1973-01-01

The author has identified the following significant results. Lake Apopka and three lakes downstream of it (Dora, Eustis, and Griffin) are in an advanced state of eutrophication with high algal concentrations. This feature has shown up consistently on ERTS-1 images in the form of a characteristic water color for those lakes. As expected, EREP photographs also show a characteristic color for those lakes. What was not expected is that Lake Griffin shows a clear pattern of this coloration. Personnel familiar with the lake believe that the photograph does, indeed, show an algal bloom. It is reported that the algal concentration is often significantly higher in the southern portion of the lake. What the photograph shows that was not otherwise known is the pattern of the algal bloom. A similar, but less pronounced, effect is seen in Lake Tohopekaliga. Personnel stationed at Kissimmee reported that there was an algal bloom on that lake at the time of the EREP pass and that its extent corresponded approximately to that shown on the photograph. Again, the EREP photograph gives information about the extent of the bloom that could not be obtained practically by sampling. ERTS-1 images give some indication of this algal distribution on Lake Griffin in some cases, but are inconclusive.

Metacognition: towards a new approach to quality of life.

PubMed

Blanc, Julien; Boyer, Laurent; Le Coz, Pierre; Auquier, Pascal

2014-03-01

Recent studies have demonstrated that various diseases states (e.g., schizophrenia, Alzheimer's disease) and events (e.g., a stroke) alter a person's perception of their physical and mental status. Most often this involves alterations in a person's metacognitive capabilities, and this can question the conceptual model of quality of life (QoL) based on a "perspectivist" approach. Using the example of schizophrenia, we applied a philosophical model, developed by Griffin, to deal with this potential threat to the validity of QoL assessment. Patients with schizophrenia are at risk for being impaired in their ability to assess their QoL. We hypothesise that metacognition (i.e., the ability to attribute mental states in terms of beliefs and goals to one's self and others) is a formal condition to assess QoL. This particular skill is important because self-reflection is necessary for making a qualitative judgment. A link between this psychological concept and the philosophical concept of reflexivity may be established. We propose a conceptual approach to QoL that takes into account the patient's reflexivity. This approach is derived from Griffin's theory based on the list of "prudential values" and the satisfaction of the informed desires of the individual. The ability of patients to evaluate and value their life should be considered to enrich the concept of QoL. The approach derived from Griffin's theory might constitute a new avenue for QoL research.

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Administrator Michael Griffin testifies during a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

Effect of gallium environment on infrared emission in Er3+-doped gallium– antimony– sulfur glasses

PubMed Central

Jiao, Qing; Li, Ge; Li, Lini; Lin, Changgui; Wang, Guoxiang; Liu, Zijun; Dai, Shixun; Xu, Tiefeng; Zhang, Qinyuan

2017-01-01

Gallium-based Ga–Sb–S sulfide glasses was elaborated and studied. A relationship between the structure, composition, and optical properties of the glass has been established. The effects of the introduction of Ga on the structure using infrared and Raman spectroscopies and on the Er3+-doped IR emission have been discussed. The results show that incorporation of Ga induced the dissociation of [SbS3] pyramids units and the formation of tetrahedral [GaS4] units. The dissolved rare earth ions are separated around the Ga–S bonding and the infrared emission quenching are controlled. Moreover, continuous introduction of Er ions into the glass forms more Er–S bonds through the further aggregation surrounding the [GaS4] units. In return, the infrared emission intensity decreased with excessive Er ion addition. This phenomenon is correlated with the recurrence concentration quenching effect induced by the increase of [GaS4] units. PMID:28106143

Retention Patterns for Army National Guard Units Attending the National Training Center

DTIC Science & Technology

1988-04-01

which are more difficult, Table 2.1 NTC ROUNDOUT BATTALION SCHEDULE ARNG UNIT STATE DATES 1-108 AR GA 9-22 September 󈨗 2-136 INF (M) MN 19 April-8 May...1984 1-121 INF (M) GA 3-22 October 󈨘 2-121 INF (M) GA 18 March-6 April 󈨙 2-152 AR AL 1-20 June 󈨙 2-120 INF (M) NC 26 June-15 July 󈨙 3-156 INF...roundout unit to the 24th Infantry Division headquartered at Fort Stewart, Georgia. Elements of the unit are located in Tifton , Valdosta, Fitzgerald and

Selected fluvial monazite deposits in the southeastern United States

USGS Publications Warehouse

Overstreet, William C.; White, A.M.; Theobald, P.K.; Caldwell, D.W.

1971-01-01

Farther southwest in Georgia, around Griffin and Zebullon, along streams tributary to the Flint River in the monazite belt the flood plains are generally small and discontinuous, and only about 1 percent of the sediment is gravel. The area between Griffin, Zebullon, and the Flint River is underlain by biotite schist and biotite gneiss into which biotite granite has been intruded. Only along one stream, Flat Creek, which drains monazite-bearing granite near Zetella, Ga., are the tenors in monazite even moderately high, but a combination of thick, clayey overburden and discontinuous flood plains make the stream unsuitable for placer mining. Elsewhere in the Flint River area the heavy-mineral concentrates contain less than 1 percent monazite. The southwesternmost area in which reconnaissance of the monazite belt was conducted includes a groups of southwest-flowing tributaries to the Chattahoochee River north of Pine Mountain and near La Grange, Ga. A combination of three characteristics of the alluvium make the area unfavorable for mining: (1) the upper half of the sedimentary sequence is clay and silt, (2) there is scant gravel, and (3) much of the sand is fine grained. Monazite is associated with the Snelson Granite, schists, and gneisses north of the Towaliga fault, but even in this area the tenor of most riffle sediments is only 0.1 to 0.5 pound of monazite per cubic yard, and the average tenor of the alluvium is about 0.2 pound per cubic Yard. Rocks south of the Towaliga fault contain scant monazite. The monazite-bearing area in the drainage basin of the Chattahoochee River has no monazite placers. Evidence from the areas on the Flint and Chattahoochee Rivers shows that streams in western Georgia are a much poorer source of monazite than streams farther to the northeast in Georgia, South Carolina, and North Carolina. Also, the northeastern part of the belt in the drainage basins of the Yadkin and Dan Rivers is a poorer source for monazite than the area between the Savannah and Catawba Rivers, S.C.-N.C. Monazite-bearing crystalline rocks in the western belt contain about 0.06 pound of monazite per cubic yard. Residual soil derived from the crystalline rocks contains about 0.3 to 0.4 pound of monazite per cubic yard, and colluvial sediments formed by sheet-wash from saprolite, residual soil, and, rarely, old stream deposits, have an average of 3.1 pounds of monazite to the cubic yard. The data on the tenors of residual and colluvial deposits are far less comprehensive than those an the quantity of monazite in the crystalline rocks, but the tenors are probably of the correct order of magnitude. Neither the crystalline rocks nor the residual soils are ores of monazite. Because the colluvial deposits are thin and have patch distribution they could not be mined independently, but some colluvium could be stripped from the adjoining hills in conjunction with the mining of alluvial deposits in the valleys. It is most unlikely that alluvial monazite placers have formed in the trunk streams leading southeastward out of the monazite belt. Churn drilling on the Broad and North Tyger Rivers, South Carolina, at the east edge of the belt has shown that the bulk of the alluvium is fine-grained sediment that contains 0.2 to 0.4 pound of monazite per cubic yard--tenors that represent no considerable enrichment over those in the crystalline rocks and residual soils. The probable persistence of predominantly fine-grained alluvium downstream to the Coastal Plain and the certain dilution of monazite-bearing concentrates by the inflow of monazite-free suites of heavy minerals between the belt and the fall line suggest that the trunk streams east of the belt are the least favorable sources for alluvial monazite in the Piedmont?

75 FR 49890 - Pacific Fishery Management Council; Public Meeting

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-16

... INFORMATION CONTACT: Kerry Griffin, Staff Officer; telephone: 503-820-2280. SUPPLEMENTARY INFORMATION: The primary purpose of the work session is to review and discuss two draft terms of reference (TOR) for new...

"Universe" event at AIMS

NASA Astrophysics Data System (ADS)

2008-06-01

Report of event of 11 May 2008 held at the African Institute of Mathematical Sciences (Muizenberg, Cape), with speakers Michael Griffin (Administrator of NASA), Stephen Hawking (Cambridge), David Gross (Kavli Institute, Santa Barbara) and George Smoot (Berkeley).

Space Radar Image of Canberra, Australia

NASA Technical Reports Server (NTRS)

1994-01-01

Australia's capital city, Canberra, is shown in the center of this spaceborne radar image. Images like this can help urban planners assess land use patterns. Heavily developed areas appear in bright patchwork patterns of orange, yellow and blue. Dense vegetation appears bright green, while cleared areas appear in dark blue or black. Located in southeastern Australia, the site of Canberra was selected as the capital in 1901 as a geographic compromise between Sydney and Melbourne. Design and construction of the city began in 1908 under the supervision of American architect Walter Burley-Griffin. Lake Burley-Griffin is located above and to the left of the center of the image. The bright pink area is the Parliament House. The city streets, lined with government buildings, radiate like spokes from the Parliament House. The bright purple cross in the lower left corner of the image is a reflection from one of the large dish-shaped radio antennas at the Tidbinbilla, Canberra Deep Space Network Communication Complex, operated jointly by NASA and the Australian Space Office. This image was acquired by the Spaceborne Imaging Radar-C/X-band Synthetic Aperture Radar (SIR-C/X-SAR) on April 10, 1994, onboard the space shuttle Endeavour. The image is 28 kilometers by 25 kilometers (17 miles by 15 miles) and is centered at 35.35 degrees south latitude, 149.17 degrees east longitude. North is toward the upper left. The colors are assigned to different radar frequencies and polarizations as follows: red is L-band, horizontally transmitted and received; green is L-band, horizontally transmitted and vertically received; and blue is C-band, horizontally transmitted and vertically received. SIR-C/X-SAR, a joint mission of the German, Italian, and United States space agencies, is part of NASA's Office of Mission to Planet Earth.

GaN-based sensor nodes for in situ detection of gases

NASA Technical Reports Server (NTRS)

Son, Kyung-Ah (Inventor); Prokopuk, Nicholas (Inventor); Moon, Jeong-Sun (Inventor)

2008-01-01

A system for detecting chemical/biological substances and a detection method. The system comprises a plurality of sensing units or nodes and a radiofrequency link. Each unit has several sensors with different sensing curves. Each sensor is able to transmit information related to the sensed substance on a specific frequency. The sensors preferably comprise AlGaN/GaN high electron mobility transistors.

Detrital zircon geochronology of Neoproterozoic to Middle Cambrian miogeoclinal and platformal strata: Northwest Sonora, Mexico

USGS Publications Warehouse

Gross, E.L.; Stewart, John H.; Gehreis, G.E.

2000-01-01

Eighty-five detrital zircon grains from Mesoproterozoic and/or Neoproterozoic to Middle Cambrian sedimentary strata in northwest Sonora, Mexico, have been analyzed to determine source terranes and provide limiting depositional ages of the units. The zircon suites from the Mesoproterozoic and/or Neoproterozoic El Alamo Formation and El Aguila unit yield ages between 1.06 Ga and 2.67 Ga, with predominant ages of 1.1 to 1.2 Ga. Zircons from the Lower? and Middle Cambrian Bolsa Quartzite show age groups from 525 Ma to 1.63 Ga, with a dominant population of 1.1 to 1.2 Ga grains. Grains older than 1.2 Ga in the samples were most likely derived from basement terranes and ???1.4 Ga granitic bodies of the southwest U.S. and northwest Mexico. It is also possible that the sediments were transported from the south, although source rocks of the appropriate age are not presently exposed south of the study area in northern Mexico. Three possibilities for the dominant 1.1 to 1.2 Ga grains include derivation from: (I) exposures of the Grenville belt in southern North America, (2) local 1.1-1.2 Ga granite bodies, or (3) a southern source, such as the Oaxaca terrane, that was subsequently rifted away. Sampling of additional units in the western U.S. and northern Mexico may help resolve the ambiguity surrounding the source of the 1.1 to 1.2 Ga grains.

Special Issue on Labor in the Americas.

ERIC Educational Resources Information Center

Cornfield, Daniel B.; And Others

1997-01-01

Includes "Labor Transnationalism?" (Cornfield); "Globalization and International Labor Organizing" (Boswell, Stevis); "Trade Unions and European Integration" (Hyman); "Trade Policy and Southern Economy" (Margo, Griffin); "Institutionalization of the Sociology of Work in Latin America" (Abramo et…

Genetics Home Reference: C3 glomerulopathy

MedlinePlus

... Jorge E, Griffin G, Harris CL, Holers VM, Johnson S, Lavin PJ, Medjeral-Thomas N, Paul Morgan B, ... Skerka C, Chen Q, Wiech T, Goodship T, Johnson S, Fremeaux-Bacchi V, Nester C, de Córdoba SR, ...

Decagonal quasicrystal and related crystalline phases in Mn-Ga alloys with 52 to 63 a/o Ga

NASA Astrophysics Data System (ADS)

Wu, J. S.; Kuo, K. H.

1997-03-01

A decagonal quasicrystal (DQC) and six related intermetallic phases with large unit cells have been found in binary Mn-Ga alloys with 52 to 63 at. pct Ga by means of transmission electron microscopy (TEM). As does the Al-Mn DQC, the Ga-Mn DQC also has a periodicity of 1.25 nm along its tenfold axis. However, its Mn content, determined by electron microprobe X-ray analysis (about 45 to 50 at. pct Mn), is much higher than that of the Al-Mn DQC (about 20 to 30 at. pct Mn). The compositions of the intermetallic phases are about 53, 56, 58, and 62 at. pct Ga, corresponding respectively to the unknown structures of MnGa (50.7 to 53.4 at. pct Ga), Mn5Ga6 (55 at pct Ga), Mn5Ga7 (57.9 at. pct Ga), and Mn3Ga5 (62.9 at. pct Ga) given in the binary Mn-Ga phase diagram ( Metals Hand-book, T.B. Massalski, J.L. Murray, L.H. Benneft, and H. Baker, eds., ASM, Metals Park, OH, 1986, vol. 2, p. 1144). Their lattice types have been determined by selected area electron diffraction. The ferromagnetic Mn3Ga5 is tetragonal, a=1.25 nm and c=2.50 nm; Mn5Ga7 is orthorhombic, a=4.57 nm, b=1.25 nm, and c=1.44 nm; Mn5Ga6 has two different but closely related orthorhombic unit cells, a=1.26 nm, b=1.25 nm, and c=1.48 nm as well as a=0.77 nm, b=1.25 nm, and c=2.36 nm; MnGa also has two different and related unit cells, one orthorhombic with a=2.04 nm, b=1.25 nm, and c=1.48 nm and the other monoclinic with a=2.59 nm, b=1.25 nm, c=1.15 nm, and β≈=110 deg. All these orthorhombic phases have b=1.25 nm, being the same as the periodicity along the tenfold axis of the Ga-Mn and Al-Mn DQCs. Moreover, all these six intermetallic phases give electron diffraction patterns displaying a pseudo-tenfold distribution of strong diffraction spots and are considered to be crystalline approximants of the Ga-Mn DQC.

Bone-seeking TRAP conjugates: surprising observations and their implications on the development of gallium-68-labeled bisphosphonates

PubMed Central

2012-01-01

Background Bisphosphonates possess strong affinity to bone. 99mTc bisphosphonate complexes are widely used for bone scintigraphy. For positron emission tomography (PET) bone imaging, Ga-68-based PET tracers based on bisphosphonates are highly desirable. Findings Two trimeric bisphosphonate conjugates of the triazacyclononane-phosphinate (TRAP) chelator were synthesized, labeled with Ga-68, and used for microPET imaging of bone in male Lewis rats. Both Ga-68 tracers show bone uptake and, thus, are suitable for PET bone imaging. Surprisingly, Ga-71 nuclear magnetic resonance data prove that Ga(III) is not located in the chelating cavity of TRAP and must therefore be bound by the conjugated bisphosphonate units. Conclusion The intrinsic Ga-68 chelating properties of TRAP are not needed for Ga-68 PET bone imaging with TRAP-bisphosphonate conjugates. Here, TRAP serves only as a trimeric scaffold. For preparation of Ga-68-based bone seekers for PET, it appears sufficient to equip branched scaffolds with multiple bisphosphonate units, which serve both Ga-68-binding and bone-targeting purposes. PMID:22464278

STS-119 Breakfast Meeting with NASA Administrator Mike Griffin

NASA Image and Video Library

2009-01-09

NASA Administrator Mike Griffen having breakfast with the STS-119 crew, then receiving a tour of the Small Pressurized Rover demonstration. Photo Date: January 9, 2009 Location: Bldg. 27 - Astronaut Quarantine. Photographer: R.Markowitz, x37739

ERIC: Sphinx or Golden Griffin?

ERIC Educational Resources Information Center

Lopez, Manuel D.

1989-01-01

Evaluates the Educational Resources Information Center (ERIC) database. Summarizes ERIC's history and organization, and discusses criticisms concerning access, currency, and database content. Reviews role of component clearinghouses, indexing practices, thesaurus structure, international coverage, and comparative studies. Finds ERIC a valuable…

76 FR 1495 - Qualification of Drivers; Exemption Applications; Diabetes Mellitus

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-10

.... Feldt, Christopher J. Grause, Shannon A. Griffin, Edward M. Houston, John R. MacDougall, Carlos E. Martinez, Matthew M. Rollins, Shawn G. Sherman, Mark W. Shuff, Steven M. Simpson and James H. Smith from...

Constellation Program Press Conference

NASA Image and Video Library

2006-06-04

NASA Administrator Michael Griffin, speaks during a press conference outlining specific center responsibilities associated with the Constellation Program for robotic and human Moon and Mars exploration, Monday, June 5, 2006, at NASA Headquarters in Washington. Photo Credit (NASA/Bill Ingalls)

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Administrator Michael Griffin testifies as NASA Deputy Administrator Shana Dale looks on during a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Administrator Michael Griffin reviews his written testimony prior to the start of a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Administrator Michael Griffin testifies makes a point during testimony in front of a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Administrator Michael Griffin, left, testifies as NASA Deputy Administrator Shana Dale looks during a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Administrator Michael Griffin reads from his written testimony while testifying in front of a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

KSC-06pd1423

NASA Image and Video Library

2006-07-04

KENNEDY SPACE CENTER, FLA. - In Firing Room 4 of the Launch Control Center, NASA Administrator Mike Griffin congratulates the launch team on the successful launch of Space Shuttle Discovery on mission STS-121. The launch was the first ever to take place on Independence Day. Liftoff was on-time at 2:38 p.m. EDT. Others next to Griffin are (left to right) David R. Mould, assistant administrator for NASA Public Affairs ; Lisa Malone, director of External Relations at Kennedy; Bruce Buckingham, news chief at the NASA News Center at Kennedy; and Mike Leinbach, Shuttle Program director. During the 12-day mission, the STS-121 crew of seven will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Landing is scheduled for July 16 or 17 at Kennedy's Shuttle Landing Facility. Photo credit: NASA/Kim Shiflett

At last...?: Michelle Obama, Beyoncé, race & history.

PubMed

Griffin, Farah Jasmine

2011-01-01

In this essay, Griffin brings to the fore two extraordinary black women of our age: First Lady Michelle Obama and entertainment mogul Beyoncé Knowles. Both women signify change in race relations in America, yet both reveal that the history of racial inequality in this country is far from over. As an Ivy League-educated descendent of slaves, Michelle Obama is not just unfamiliar to the mainstream media and the Washington political scene; during the 2008 presidential campaign, she was vilified as angry and unpatriotic. Beyoncé, who controls the direction of her career in a way that pioneering black women entertainers could not, has nonetheless styled herself in ways that recall the distinct racial history of the Creole South. Griffin considers how Michelle Obama's and Beyoncé's use of their respective family histories and ancestry has bolstered or diminished their popular appeal.

Supreme Court Hears Privacy Case Between NASA and Jet Propulsion Laboratory Scientists

NASA Astrophysics Data System (ADS)

Showstack, Randy

2010-10-01

After NASA put into practice the 2004 Homeland Security Presidential Directive-12, known as HSPD-12, Dennis Byrnes talked to then-NASA administrator Michael Griffin. Byrnes recalls that Griffin told him in 2007 that if he didn’t like the agency's implementation of HSPD-12, he should go to court. That's exactly what Byrnes, an employee of the California Institute of Technology (Caltech) working as a senior engineer at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, Calif., did. Concerned about prying and open-ended background investigations of federal contractors through NASA's implementation of HSPD-12, he, along with lead plaintiff Robert Nelson and 26 other Caltech employees working at JPL, sued NASA. Following several lower court decisions, including an injunction issued by a U.S. federal appeals court in response to a plaintiff motion, the case made it all the way to the U.S. Supreme Court, which heard oral arguments on 5 October.

Unbalanced Stability: Applying Lessons from American Cities in Stability Operations

DTIC Science & Technology

2011-05-19

teenagers congregating on street corners, public solicitation for prostitution, begging, public drinking, verbal harassment of women on the street, and...United Nations Security Council, “United Nations Security Council Resolution 1590 (2005).” http://www.un.org/ga/search/view_doc.asp?symbol=S/RES/ 1590 (2005...Security Council. “United Nations Security Council Resolution 1590 (2005).” United Nations. http://www.un.org/ga/search/view_doc.asp?symbol=S/RES/ 1590

Power of Pets: Health Benefits of Human-Animal Interactions

MedlinePlus

... anxiety levels dropped. The children also had better social interactions and were more engaged with their peers. The ... a way of building a bridge for those social interactions,” Griffin says. He adds that researchers are trying ...

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Administrator Michael Griffin, left, and NASA Deputy Administrator Shana Dale share a laugh during a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Administrator Michael Griffin, left, testifies as NASA Deputy Administrator Shana Dale looks on during a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Administrator Michael Griffin, left, and NASA Deputy Administrator Shana Dale testify in front of a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Deputy Administrator Shana Dale, right, speaks as NASA Administrator Michael Griffin looks on during a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

International Perspectives on Lifelong Learning.

ERIC Educational Resources Information Center

Holford, John, Ed.; Jarvis, Peter, Ed.; Griffin, Colin, Ed.

This book contains 30 papers providing international perspectives on lifelong learning. The following papers are included: "Edgar Faure after 25 Years" (Roger Boshier); "Public Rhetoric and Public Policy" (Colin Griffin); "Lifelong Learning and the European Union" (Barry J. Hake); "Critical Perspectives and New…

29 CFR Appendix A to Part 71 - Responsible Officials

Code of Federal Regulations, 2013 CFR

2013-07-01

... Policy Development & Research Administrator, Office of Financial & Administrative Management Director... Research Director, Operations Office of the Inspector General (OIG) Disclosure Officer Office of Public... Griffin Street, Suite 800, Dallas, TX 75202 Western Region 71 Stevenson Street, Suite 930, San Francisco...

29 CFR Appendix A to Part 71 - Responsible Officials

Code of Federal Regulations, 2012 CFR

2012-07-01

... Policy Development & Research Administrator, Office of Financial & Administrative Management Director... Research Director, Operations Office of the Inspector General (OIG) Disclosure Officer Office of Public... Griffin Street, Suite 800, Dallas, TX 75202 Western Region 71 Stevenson Street, Suite 930, San Francisco...

29 CFR Appendix A to Part 71 - Responsible Officials

Code of Federal Regulations, 2010 CFR

2010-07-01

... Policy Development & Research Administrator, Office of Financial & Administrative Management Director... Research Director, Operations Office of the Inspector General (OIG) Disclosure Officer Office of Public... Griffin Street, Suite 800, Dallas, TX 75202 Western Region 71 Stevenson Street, Suite 930, San Francisco...

29 CFR Appendix A to Part 71 - Responsible Officials

Code of Federal Regulations, 2011 CFR

2011-07-01

... Policy Development & Research Administrator, Office of Financial & Administrative Management Director... Research Director, Operations Office of the Inspector General (OIG) Disclosure Officer Office of Public... Griffin Street, Suite 800, Dallas, TX 75202 Western Region 71 Stevenson Street, Suite 930, San Francisco...

29 CFR Appendix A to Part 71 - Responsible Officials

Code of Federal Regulations, 2014 CFR

2014-07-01

... Policy Development & Research Administrator, Office of Financial & Administrative Management Director... Research Director, Operations Office of the Inspector General (OIG) Disclosure Officer Office of Public... Griffin Street, Suite 800, Dallas, TX 75202 Western Region 71 Stevenson Street, Suite 930, San Francisco...

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Administrator Michael Griffin, left, and NASA Deputy Administrator Shana Dale talk prior to the start of a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

Detrital zircon provenance of Mesoproterozoic to Cambrian arenites in the Western United States and Northwestern Mexico

USGS Publications Warehouse

Stewart, John H.; Gehrels, G.E.; Barth, A.P.; Link, P.K.; Christie-Blick, N.; Wrucke, C.T.

2001-01-01

U-Pb isotopic dating of detrital zircon from supracrustal Proterozoic and Cambrian arenites from the western United States and northern Mexico reveal three main age groups, 1.90 to 1.62 Ga, 1.45 to 1.40 Ga, and 1.2 to 1.0 Ga. Small amounts of zircons with ages of 3.1 to 2.5 Ga, 1.57 Ga, 1.32 Ga, 1.26 Ga, 0.7 Ga, and 0.5 Ga are also present. Detrital zircons ranging in age from 1.90 to 1.62 Ga and from 1.45 to 1.40 Ga are considered to have been derived from Proterozoic crystalline basement rocks of these known ages, and probably in part from reworked Proterozoic supracrustal sedimentary rocks, of the western United States. The 1.2 to 1.0 Ga detrital zircon ages from California, Arizona, and Sonora are characterized by distinct spikes (1.11 Ga, in particular) in the age-probability plots. These spikes are interpreted to indicate the influx of zircon from major silicic volcanic fields. Igneous rocks such as the Pikes Peak Granite (1.093 Ga) of Colorado, and the Aibo Granite (1.110 Ga) of Sonora, Mexico, may represent the deeply eroded roots of such volcanic fields. Samples from farther north along the Cordilleran margin that contain abundant 1.2-1.0 Ga detrital zircons do not show spikes in the age distribution, but rather ages spread out across the entire 1.2-1.0 Ga range. These age spectra resemble those for detrital zircons from the Grenville province, which is considered their source. Less common detrital zircons had a variety of sources. Zircons ranging in age from 3.36 to 2.31 Ga were apparently derived from inland parts of the North American continent from Wyoming to Canada. Zircons of about 1.577 Ga are highly unusual and may have had an exotic source; they may have come from Australia and been deposited in North America when Australia and North America were juxtaposed as part of the hypothetical Rodinian supercontinent. Detrital zircon of ??1.320 Ga apparently had the same source as that for tuff (1.320 Ga) in the Pioneer Shale of the Apache Group in Arizona. Detrital zircons of about 1.26 Ga in the Apache Group and Troy Quartzite appear to be related to local, approximately coeval volcanic fields. Zircons of about 0.7 Ga may have had a source in igneous rocks related to rifting of the Proterozoic supercontinent of Rodinia, and 0.5 Ga zircons a source in relatively small areas of granitic rocks of this known, or inferred, age in Oklahoma, Texas, New Mexico, and Colorado.

Synthesis, structure and characterization of two new organic template-directed gallium phosphate/phosphite-oxalates

NASA Astrophysics Data System (ADS)

Xue, Zhen-Zhen; Pan, Jie; Li, Jin-Hua; Wang, Zong-Hua; Wang, Guo-Ming

2017-06-01

Two new gallium phosphate/phosphite-oxalates hybrid solids, {[H2dmpip][Ga2(HPO4)2(PO4)(C2O4)0.5]·H2O} (1) and [H2apm][Ga2(H2PO3)2(HPO3)2(C2O4)] (2), where dmpip = 2,6-dimethyl-piperazine and apm = N-(3-aminopropyl)morpholine, have been synthesized and structurally characterized. Both of compounds 1 and 2 are formed by the connectivity of the Ga-based polyhedral, phosphite/phosphate groups as well as oxalate units. Compound 1 possesses a two-dimensional layer structure, in which the C2O4 units via an in-plane linkage connect two Ga center within the sheet. While in 2, the C2O4 units serve as bis-bidentates ligands bridging two GaO6 octahedra from two distinct gallium-phosphite chains to give rise to inorganic-organic hybrid layer with 8-membered rings. In these materials, the structure-directing amines reside in the interlayer region and interact with the layers by way of hydrogen-bonds.

Stress and Life Satisfaction of Turkish College Students

ERIC Educational Resources Information Center

Kaya, Cahit; Tansey, Timothy N.; Melekoglu, Macid; Çakiroglu, Orhan

2015-01-01

This study investigated the association between perceived stress and life satisfaction of Turkish college students. The "Satisfaction with Life Scale" (Diener, Emmons, Larsen, & Griffin, 1985), the "Perceived Stress Scale" (Cohen & Williamson, 1988), and a brief demographic questionnaire were administered to 235 college…

Distance Learning Research Conference Proceedings (San Antonio, Texas, April 27-29, 1994).

ERIC Educational Resources Information Center

Yakimovicz, Ann, Ed.

The following papers are included: "Assessment of Telecommunications Needs at the Texas Department of Health" (Adair, Griffin, Steinhausen); "Realizing the Democratic Ideal in Adult Distance Learning" (Boyd, Dirkx); "Classroom Social Interaction" (Burkhart-Kriesel); "Interaction Analysis of an Inter-University…

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

NASA Administrator Michael Griffin, right, and Brian Chase, NASA's Assistant Administrator for Legislative Affairs confer prior to the start of a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

Long term accretion history (165-70 Ma) recorded by high-pressure rocks of Diego de Almagro Island (Patagonia, Chile): implications for understanding subduction zone interface tectonic processes

NASA Astrophysics Data System (ADS)

Angiboust, Samuel; Hyppolito, Thais; Glodny, Johannes; Cambeses, Aitor; Monié, Patrick; Garcia-Casco, Antonio; Calderon, Mauricio; Juliani, Caetano

2017-04-01

The Diego de Almagro Island preserves one of the rare remnants of the Mesozoic Chilean paleo-accretionary wedge. This complex, formed by MOR-basalts interleaved with metasedimentary rocks, comprises three major tectonic units with distinct P-T-t paths: the HP granulite (Lazaro unit), the garnet amphibolite (GA) and the blueschist (BS) units. HP granulite-facies metamorphic conditions in the Lazaro Unit are attested by Grt-Cpx-Zo-Prg assemblages associated with trondhjemitic leucosomes (c. 1.3 GPa, 750°C). U-Pb SHRIMP dating of zircon metamorphic rims yields a homogeneous age population of 162 ± 2 Ma for this HT event, in agreement with Sm-Nd dating of peritectic garnet (163 ± 2 Ma and 163 ± 18 Ma). In situ white mica Ar-Ar dating and multi-mineral Rb-Sr dating of LT mylonites (c. 450°C) along the base of the Lazaro Unit reveals partial resetting of HT assemblages during deformation between 115 and 72 Ma. GA unit rocks, structurally below the Lazaro unit, locally preserve eclogite facies parageneses (c. 570°C, 1.7 GPa) that underwent a pervasive stage of amphibolitization during decompression down to 1.3 GPa. U-Pb dating of zircon metamorphic rims and Rb-Sr dating indicate that amphibolitization in GA unit took place at 125-120 Ma. GA unit rocks have been also lately overprinted by another HP-LT assemblage as shown by Si-richer phengite rims and small blue amphibole overgrowths. Conversely, the underlying BS unit does not show strong amphibolite facies overprint as seen in GA and Lazaro units and exhibits slightly cooler peak metamorphic conditions (c. 520°C, 1.7 GPa). Rb-Sr and Ar-Ar dating of these blueschists yield deformation ages between 80 and 70 Ma, i.e. 50 Ma younger than the overlying rocks from the GA unit, and 90 Ma younger than Lazaro unit HP-granulites. This new report sheds light on the formation of the youngest and deepest HP rocks exposed along the Chilean subduction margin. The Diego de Almagro Island represents a unique window onto long-term tectonic processes rooted below the base of the accretionary wedge (c. 40-50 km). The exceptionally long residence time of the earlier accreted material -almost 100 Ma-, enables the record of multiple thermal gradient fluctuations and highlights the variability of the subduction interface thermal structure over tens of millions yrs.

High School Coaches' Experiences With Openly Lesbian, Gay, and Bisexual Athletes.

PubMed

Halbrook, Meghan K; Watson, Jack C; Voelker, Dana K

2018-01-17

Despite reports that there has been a positive trend in perception and treatment of lesbian, gay, and bisexual (LGB) individuals in recent years (Griffin, 2012 ; Loftus, 2001 ), sport, in general, is still an uncertain, and sometimes even hostile, environment for LGB athletes (Anderson, 2005 ; Waldron & Krane, 2005 ). To gain more information on coach understanding and perceptions of the team environment, 10 high school head coaches in the United States were interviewed to explore their experiences coaching openly LGB athletes. Qualitative analyses revealed four primary themes associated with coach experiences: team environment dogmas and observations, fundamental beliefs contributing to perceptions of LGB athletes, types and timing of sexual orientation disclosure, and differential LGB athlete characteristics. Future research should examine these primary themes in more detail through interviews with LGB athletes, as well as high school coaches in more traditionally masculine sports, such as football, men's basketball, and wrestling.

Changes in the prevalence of breast feeding in preterm infants discharged from neonatal units: a register study over 10 years

PubMed Central

Flacking, Renée; Hellström-Westas, Lena

2016-01-01

Objective There are indications that the prevalence of exclusively breastfed preterm infants is decreasing in Sweden. The objective was to investigate trends in exclusive breast feeding at discharge from Swedish neonatal units and associated factors in preterm infants. Design, setting and participants This is a register study with data from the Swedish Neonatal Quality Register. Data from 29 445 preterm infants (gestational age (GA) <37 weeks) who were born during the period 2004–2013 were retrieved. Data included maternal, perinatal and neonatal characteristics. Data were analysed for the whole population as well as for 3 GA groups. Results From 2004 to 2013, the prevalence of exclusive breast feeding decreased, in extremely preterm (GA 22–27 weeks) from 55% to 16%, in very preterm (GA 28–31 weeks) from 41% to 34% and in moderately preterm infants (GA 32–36 weeks) from 64% to 49%. The decline was statistically significant (p<0.001) in all 3 GA groups. This decline remained significant when adjustments were made for factors negatively associated with exclusive breast feeding and which became more prevalent during the study period, that is, small for GA (all groups) and maternal mental illness (very preterm and moderately preterm infants). Conclusions In the past 10 years, Sweden has experienced a lower rate of exclusive breast feeding in preterm infants, especially in extremely preterm infants. The factors analysed in this study explain only a small proportion of this decline. The decline in exclusive breast feeding at discharge from neonatal units raises concern and present challenges to the units to support and promote breast feeding. PMID:27965252

Mars: the evolutionary history of the northern lowlands based on crater counting and geologic mapping

USGS Publications Warehouse

Werner, S.C.; Tanaka, K.L.; Skinner, J.A.

2011-01-01

The geologic history of planetary surfaces is most effectively determined by joining geologic mapping and crater counting which provides an iterative, qualitative and quantitative method for defining relative ages and absolute model ages. Based on this approach, we present spatial and temporal details regarding the evolution of the Martian northern plains and surrounding regions. The highland–lowland boundary (HLB) formed during the pre-Noachian and was subsequently modified through various processes. The Nepenthes Mensae unit along the northern margins of the cratered highlands, was formed by HLB scarp-erosion, deposition of sedimentary and volcanic materials, and dissection by surface runoff between 3.81 and 3.65 Ga. Ages for giant polygons in Utopia and Acidalia Planitiae are ~ 3.75 Ga and likely reflect the age of buried basement rocks. These buried lowland surfaces are comparable in age to those located closer to the HLB, where a much thinner, post-HLB deposit is mapped. The emplacement of the most extensive lowland surfaces ended between 3.75 and 3.4 Ga, based on densities of craters generally View the MathML source> 3 km in diameter. Results from the polygonal terrain support the existence of a major lowland depocenter shortly after the pre-Noachian formation of the northern lowlands. In general, northern plains surfaces show gradually younger ages at lower elevations, consistent local to regional unit emplacement and resurfacing between 3.6 and 2.6 Ga. Elevation levels and morphology are not necessarily related, and variations in ages within the mapped units are found, especially in units formed and modified by multiple geological processes. Regardless, most of the youngest units in the northern lowlands are considered to be lavas, polar ice, or thick mantle deposits, arguing against the ocean theory during the Amazonian Period (younger than about 3.15 Ga). All ages measured in the closest vicinity of the steep dichotomy escarpment are also 3.7 Ga or older. The formation ages of volcanic flanks at the HLB (e.g., Alba Mons (3.6–3.4 Ga) and the last fan at Apollinaris Mons, 3.71 Ga) may give additional temporal constraint for the possible existence of any kind of Martian ocean before about 3.7 Ga. It seems to reflect the termination of a large-scale, precipitation-based hydrological cycle and major geologic processes related to such cycling.

The Rondonian-San Ignacio Province in the SW Amazonian Craton: An overview

NASA Astrophysics Data System (ADS)

Bettencourt, Jorge Silva; Leite, Washington Barbosa; Ruiz, Amarildo Salina; Matos, Ramiro; Payolla, Bruno Leonelo; Tosdal, Richard M.

2010-01-01

The Rondonian-San Ignacio Province (1.56-1.30 Ga) is a composite orogen created through successive accretion of arcs, ocean basin closure and final oblique microcontinent-continent collision. The effects of the collision are well preserved mostly in the Paraguá Terrane (Bolivia and Mato Grosso regions) and in the Alto Guaporé Belt and the Rio Negro-Juruena Province (Rondônia region), considering that the province was affected by later collision-related deformation and metamorphism during the Sunsás Orogeny (1.25-1.00 Ga). The Rondonian-San Ignacio Province comprises: (1) the Jauru Terrane (1.78-1.42 Ga) that hosts Paleoproterozoic basement (1.78-1.72 Ga), and the Cachoeirinha (1.56-1.52 Ga) and the Santa Helena (1.48-1.42 Ga) accretionary orogens, both developed in an Andean-type magmatic arc; (2) the Paraguá Terrane (1.74-1.32 Ga) that hosts pre-San Ignacio units (>1640 Ma: Chiquitania Gneiss Complex, San Ignacio Schist Group and Lomas Manechis Granulitic Complex) and the Pensamiento Granitoid Complex (1.37-1.34 Ga) developed in an Andean-type magmatic arc; (3) the Rio Alegre Terrane (1.51-1.38 Ga) that includes units generated in a mid-ocean ridge and an intra-oceanic magmatic arc environments; and (4) the Alto Guaporé Belt (<1.42-1.34 Ga) that hosts units developed in passive marginal basin and intra-oceanic arc settings. The collisional stage (1.34-1.32 Ga) is characterized by deformation, high-grade metamorphism, and partial melting during the metamorphic peak, which affected primarily the Chiquitania Gneiss Complex and Lomas Manechis Granulitic Complex in the Paraguá Terrane, and the Colorado Complex and the Nova Mamoré Metamorphic Suite in the Alto Guaporé Belt. The Paraguá Block is here considered as a crustal fragment probably displaced from its Rio Negro-Juruena crustal counterpart between 1.50 and 1.40 Ga. This period is characterized by extensive A-type and intra-plate granite magmatism represented by the Rio Crespo Intrusive Suite (ca. 1.50 Ga), Santo Antonio Intrusive Suite (1.40-1.36 Ga), and the Teotônio Intrusive Suite (1.38 Ga). Magmatism of these types also occur at the end of the Rondonian-San Ignacio Orogeny, and are represented by the Alto Candeias Intrusive Suite (1.34-1.36 Ga), and the São Lourenço-Caripunas Intrusive Suite (1.31-1.30 Ga). The cratonization of the province occurred between 1.30 and 1.25 Ga.

[Book review] Fish immunology, edited by M. J. Manning and M. F. Tatner

USGS Publications Warehouse

Griffin, B.R.

1986-01-01

Review of: Fish Immunology. Edited by M. J. Manning and M. F. Tatner. Academic Press, London. 1985. 374 pages. $32.50. Reviewed by B. R. Griffin, Fish Farming Experimental Station, U.S. Fish and Wildlife Service, Stuttgart, Arkansas 72160, USA.

The Prolonged Downfall of the Democratic Republic of Afghanistan

DTIC Science & Technology

2014-05-22

Afghanistan (London, UK: Pluto Press, 2001); Gilles Dorronsoro, Revolution Unending: Afghanistan, 1979 to the Present, trans. John King (New York, NY...2 (May 2007): 235-61. Griffin, Michael. Reaping the Whirlwind: The Taliban Movement in Afghanistan. London, UK: Pluto Press, 2001. Jalali, Ali

Constellation Program Update

NASA Image and Video Library

2006-06-04

Dean Acosta, NASA Deputy Assistant Administrator and Press Secretary, left, moderates a NASA Update with NASA Administrator Michael Griffin, Scott J. Horowitz, NASA Associate Administrator for Exploration Systems and Jeff Hanley, Constellation Program Manager, right, on Wednesday, June 5, 2006, at NASA Headquarters in Washington. Photo Credit: (NASA/Bill Ingalls)

Far From ‘Easy’ Spectroscopy with the 8π and GRIFFIN Spectrometers at TRIUMF-ISAC

NASA Astrophysics Data System (ADS)

Garrett, P. E.; Radich, A. J.; Allmond, J. M.; Andreoiu, C.; Ball, G. C.; Bender, P. C.; Bianco, L.; Bildstein, V.; Bidaman, H.; Braid, R.; Burbadge, C.; Chagnon-Lessard, S.; Cross, D. S.; Deng, G.; Demand, G. A.; Diaz Varela, A.; Dunlop, M. R.; Dunlop, R.; Finlay, P.; Garnsworthy, A. B.; Grinyer, G. F.; Hackman, G.; Hadinia, B.; Ilyushkin, S.; Jigmeddorj, B.; Kisliuk, D.; Kuhn, K.; Laffoley, A. T.; Leach, K. G.; MacLean, A. D.; Michetti-Wilson, J.; Miller, D.; Moore, W.; Olaizola, B.; Orce, J. N.; Pearson, C. J.; Pore, J. L.; Rajabali, M. M.; Rand, E. T.; Sarazin, F.; Smith, J. K.; Starosta, K.; Sumithrarachchi, C. S.; Svensson, C. E.; Triambak, S.; Turko, J.; Wang, Z. M.; Wood, J. L.; Wong, J.; Williams, S. J.; Yates, S. W.; Zganjar, E. F.

2015-09-01

The 8π spectrometer, installed at the TRIUMF-ISAC facility, was the world's most sensitive γ-ray spectrometer dedicated to β-decay studies. A description is given of the 8π spectrometer and its auxiliary detectors including the plastic scintillator array SCEPTAR used for β-particle tagging and the Si(Li) array PACES for conversion electron measurements, its moving tape collector, and its data acquisition system. The recent investigation of the decay of 124Cs to study the nuclear structure of 124Xe, and how the β-decay measurements complemented previous Coulomb excitation studies, is highlighted, including the extraction of the deformation parameters for the excited 0+ bands in 124Xe. As a by-product, the decay scheme of the (7+) 124Cs isomeric state, for which the data from the PACES detectors were vital, was studied. Finally, a description of the new GRIFFIN spectrometer, which uses the same auxiliary detectors as the 8π spectrometer, is given.

Career Profile: Flight Operations Engineer (Aeronautics) Brian Griffin

NASA Image and Video Library

2014-10-17

Operations engineers at NASA's Armstrong Flight Research Center help to advance science, technology, aeronautics, and space exploration by managing operational aspects of a flight research project. They serve as the governing authority on airworthiness related to the modification, operation, or maintenance of specialized research or support aircraft so those aircraft can be flown safely without jeopardizing the pilots, persons on the ground or the flight test project. With extensive aircraft modifications often required to support new research and technology development efforts, operations engineers are key leaders from technical concept to flight to ensure flight safety and mission success. Other responsibilities of an operations engineer include configuration management, performing systems design and integration, system safety analysis, coordinating flight readiness activities, and providing real-time flight support. This video highlights the responsibilities and daily activities of NASA Armstrong operations engineer Brian Griffin during the preparation and execution of flight tests in support of aeronautics research. http://www.nasa.gov/centers/armstrong/home/ http://www.nasa.gov/

Paleoproterozoic (ca. 1.8 Ga) arc magmatism in the Lützow-Holm Complex, East Antarctica: Implications for crustal growth and terrane assembly in erstwhile Gondwana fragments

NASA Astrophysics Data System (ADS)

Takahashi, Kazuki; Tsunogae, Toshiaki; Santosh, M.; Takamura, Yusuke; Tsutsumi, Yukiyasu

2018-05-01

The Lützow-Holm Complex (LHC) of East Antarctica forms a part of the latest Neoproterozoic-Cambrian high-grade metamorphic segment of the East African-Antarctic Orogen. Here we present new petrological, geochemical, and zircon U-Pb geochronological data on meta-igneous rocks from four localities (Austhovde, Telen, Skallevikshalsen, and Skallen) in the LHC, and evaluate the regional Paleoproterozoic (ca. 1.8 Ga) arc magmatism in this terrane for the first time. The geochemical features reveal a volcanic-arc affinity for most of the meta-igneous rocks from Austhovde and Telen, suggesting that the protoliths of these rocks were derived from felsic to mafic arc magmatic rocks. The protoliths of two mafic granulites from Austhovde are inferred as non-volcanic-arc basalt such as E-MORB, suggesting the accretion of remnant oceanic lithosphere together with the volcanic-arc components during the subduction-collision events. The weighted mean 206Pb/238U ages of the dominant population of magmatic zircons in felsic orthogneisses from Austhovde and Telen show 1819 ± 19 Ma and 1830 ± 10 Ma, respectively, corresponding to Paleoproterozoic magmatic event. The magmatic zircons in orthogneisses from other two localities yield upper intercept ages of 1837 ± 54 Ma (Skallevikshalsen), and 1856 ± 37 Ma and 1854 ± 45 Ma (Skallen), which also support Paleoproterozoic magmatism. The earlier thermal events during Neoarchean to Early Paleoproterozoic are also traced by 206Pb/238U ages of xenocrystic zircons in the felsic orthogneisses from Austhovde (2517 ± 17 Ma and 2495 ± 15 Ma) and Telen (2126 ± 16 Ma), suggesting partial reworking of the basement of a 2.5 Ga microcontinent during ca. 1.8 Ga continental-arc magmatism. The timing of peak metamorphism is inferred to be in the range of 645.6 ± 10.4 to 521.4 ± 12.0 Ma based on 206Pb/238U weighted mean ages of metamorphic zircon grains. The results of this study, together with the available magmatic ages as well as geophysical and lithological data from the region, suggest that the LHC can be divided into three units: Neoarchean (ca. 2.5 Ga) unit in the southern LHC (Shirase Orthogneiss or "Shirase microcontinent"), Neoproterozoic (ca. 1.0 Ga) unit in the northern LHC, and supracrustal unit in the central LHC with fragments of Paleoproterozoic (ca. 1.8 Ga) and minor Neoarchean (ca. 2.5 Ga) and Neoproterozoic (ca. 1.0 Ga) magmatic arcs. The 1.8 Ga arc magmatism inferred in this study has also been reported from adjacent Gondwana fragments such as the Highland Complex in Sri Lanka, and the Trivandrum and Nagercoil Blocks in southern India. Although the ca. 1.8 Ga arc-magmatic event is coeval in these regions, the Paleoproterozoic supracrustal unit in the central LHC may not be contiguous with those in the Highland Complex of Sri Lanka because recent studies have shown that the Vijayan Complex in Sri Lanka and the ca. 1.0 Ga northern LHC possibly were part of a single crustal unit (northern Lützow-Holm-Vijayan Complex) within the Kalahari Block. The supracrustal unit possibly marks part of a discrete suture formed by the collision of the ca. 2.5 Ga southern LHC (Shirase microcontinent) and the ca. 1.0 Ga northern Lützow-Holm-Vijayan Complex during the latest Neoproterozoic-Cambrian Gondwana amalgamation, which might be coeval with the collision of the Vijayan and Wanni Complexes and the formation of the Highland Complex in Sri Lanka. Our study provides new insights on crustal growth and terrane assembly in the ancient continental blocks of Gondwana.

Santa Claus, Ga./Ind.

NASA Image and Video Library

2002-12-23

The towns of Santa Claus, Ga., (top) and Santa Claus, Ind. (bottom), are shown in these two images from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA's Terra satellite. They are the only two Santa Claus towns in the United States with post offices and zip codes, although there are 11 towns with this name in the United States. Santa Claus, Ga. is located in Toombs County, and has a population of 237. Santa Claus, Ind. is located in Spencer County, and has a population of 2,041. Its name was accepted by the United States Postal Service in 1856. The images were acquired on July 3, 2000 (top) and June 16, 2001 (bottom), respectively. http://photojournal.jpl.nasa.gov/catalog/PIA03891

The Epigenetic Clock at Birth: Associations With Maternal Antenatal Depression and Child Psychiatric Problems.

PubMed

Suarez, Anna; Lahti, Jari; Czamara, Darina; Lahti-Pulkkinen, Marius; Knight, Anna K; Girchenko, Polina; Hämäläinen, Esa; Kajantie, Eero; Lipsanen, Jari; Laivuori, Hannele; Villa, Pia M; Reynolds, Rebecca M; Smith, Alicia K; Binder, Elisabeth B; Räikkönen, Katri

2018-05-01

Maternal antenatal depression may compromise the fetal developmental milieu and contribute to individual differences in aging and disease trajectories in later life. We evaluated the association between maternal antenatal depression and a novel biomarker of aging at birth, namely epigenetic gestational age (GA) based on fetal cord blood methylation data. We also examined whether this biomarker prospectively predicts and mediates maternal effects on early childhood psychiatric problems. A total of 694 mothers from the Prediction and Prevention of Preeclampsia and Intrauterine Growth Restriction (PREDO) Study provided information on history of depression diagnosed before pregnancy; 581 completed the Center for Epidemiological Studies Depression Scale throughout pregnancy, and 407 completed the Child Behavior Checklist at child's age 3.7 years (SD = 0.75 year). DNA methylation (DNAm) GA of fetal cord blood DNA was based on the methylation profile of 148 selected cytosine linked to guanine by phosphate (CpG) sites. Epigenetic GA was calculated as the arithmetic difference between DNAm GA and chronological GA and adjusted for chronological GA. Maternal history of depression diagnosed before pregnancy (mean difference = -0.25 SD units, 95% CI = -0.46 to -0.03) and greater antenatal depressive symptoms (-0.08 SD unit per 1-SD unit increase, 95% CI = -0.16 to -0.004) were associated with child's lower epigenetic GA. Child's lower epigenetic GA, in turn, prospectively predicted total and internalizing problems and partially mediated the effects of maternal antenatal depression on internalizing problems in boys. Maternal antenatal depression is associated with lower epigenetic GA in offspring. This lower epigenetic GA seems to be associated with a developmental disadvantage for boys, who, in early childhood, show greater psychiatric problems. Copyright © 2018 American Academy of Child and Adolescent Psychiatry. Published by Elsevier Inc. All rights reserved.

Constellation Program Update

NASA Image and Video Library

2006-06-04

NASA Administrator Michael Griffin addresses NASA employees and members of the media about the responsibilities of the NASA centers associated with the Constellation Program for robotic and human Moon and Mars exploration during a NASA Update on Wednesday, June 5, 2006, at NASA Headquarters in Washington. Photo Credit: (NASA/Bill Ingalls)

ACHP | News

Science.gov Websites

that the Department of the Navy and the National Aeronautics and Space Administration (NASA) work recommendations came in letters addressed to Michael D. Griffin, NASA administrator, and Donald C. Winter listed U.S. Naval Air Station Sunnyvale, California, Historic District. While the Navy and NASA will make

AN INTERDISCIPLINARY APPROACH TO VALUING WATER FROM BRUSH CONTROL: JOURNAL ARTICLE

EPA Science Inventory

NRMRL-CIN-1652 Lemberg**, B., Mjelde, J.W., Connor, R., Griffin, R.C., Rosenthal, W.D., and Stuth, J.W. An Interdisciplinary Approach to Valuing Water from Brush Control. Journal of American Water Resources Association (Warwick, J.J. (Ed.), USA: American Water Resources Assoc....

Michael Griffin | NREL

Science.gov Websites

production of high-value products Physical and chemical material characterization under reaction conditions Heterogeneous catalysis Design and operation of reactor systems Analysis of reaction kinetics and mechanisms labeled "major reaction products" at the top. On the right is a figure of blue spheres with a

Persistent Structural Priming from Language Comprehension to Language Production

ERIC Educational Resources Information Center

Bock, Kathryn; Dell, Gary S.; Chang, Franklin; Onishi, Kristine H.

2007-01-01

To examine the relationship between syntactic processes in language comprehension and language production, we compared structural persistence from sentence primes that speakers heard to persistence from primes that speakers produced. [Bock, J. K., & Griffin, Z. M. (2000). The persistence of structural priming: transient activation or implicit…

Investigating Joint Attention Mechanisms through Spoken Human-Robot Interaction

ERIC Educational Resources Information Center

Staudte, Maria; Crocker, Matthew W.

2011-01-01

Referential gaze during situated language production and comprehension is tightly coupled with the unfolding speech stream (Griffin, 2001; Meyer, Sleiderink, & Levelt, 1998; Tanenhaus, Spivey-Knowlton, Eberhard, & Sedivy, 1995). In a shared environment, utterance comprehension may further be facilitated when the listener can exploit the speaker's…

A comparison of GaAs and Si hybrid solar power systems

NASA Technical Reports Server (NTRS)

Heinbockel, J. H.; Roberts, A. S., Jr.

1977-01-01

Five different hybrid solar power systems using silicon solar cells to produce thermal and electric power are modeled and compared with a hybrid system using a GaAs cell. Among the indices determined are capital cost per unit electric power plus mechanical power, annual cost per unit electric energy, and annual cost per unit electric plus mechanical work. Current costs are taken to be $35,000/sq m for GaAs cells with an efficiency of 15% and $1000/sq m for Si cells with an efficiency of 10%. It is shown that hybrid systems can be competitive with existing methods of practical energy conversion. Limiting values for annual costs of Si and GaAs cells are calculated to be 10.3 cents/kWh and 6.8 cents/kWh, respectively. Results for both systems indicate that for a given flow rate there is an optimal operating condition for minimum cost photovoltaic output. For Si cell costs of $50/sq m optimal performance can be achieved at concentrations of about 10; for GaAs cells costing 1000/sq m, optimal performance can be obtained at concentrations of around 100. High concentration hybrid systems offer a distinct cost advantage over flat systems.

Na8Au9.8(4)Ga7.2 and Na17Au5.87(2)Ga46.63: The diversity of pseudo 5-fold symmetries in the Na-Au-Ga system

NASA Astrophysics Data System (ADS)

Smetana, Volodymyr; Corbett, John D.; Miller, Gordon J.

2013-11-01

The Na-rich part (~30% Na) of the Na-Au-Ga system between NaAu2, NaGa4, and Na22Ga39 has been found to contain the ternary phases Na8Au9.8(4)Ga7.2 (I) and Na17Au5.87(2)Ga46.63 (II), according to the results of single crystal X-ray diffraction measurements. I is orthorhombic, Cmcm, a=5.3040(1), b=24.519(5), c=14.573(3) Å, and contains a network of clusters with local 5-fold symmetry along the a-axis. Such clusters are frequent building units in decagonal quasicrystals and their approximants. II is rhombohedral, R3¯m, a=16.325(2), c=35.242(7) Å, and contains building blocks that are structurally identical to the Bergman-type clusters as well as fused icosahedral units known with active metals, triels and late transition elements. II also contains a polycationic network with elements of the clathrate V type structure. Tight-binding electronic structure calculations using linear muffin-tin-orbital (LMTO) methods on idealized models of I and II indicate that both compounds are metallic with evident pseudogaps at the corresponding Fermi levels. The overall Hamilton bond populations are generally dominated by Au-Ga and Au-Au bonds in I and by Ga-Ga bonds in II; moreover, the Na-Au and Na-Ga contributions in I are unexpectedly large, ~20% of the total. A similar involvement of sodium in covalent bonding has also been found in the electron-richer i-Na13Au12Ga15 quasicrystal approximant.

A Cross-National Perspective on Bullying

ERIC Educational Resources Information Center

Borntrager, Cameo; Davis, Joanne L.; Bernstein, Adam; Gorman, Heather

2009-01-01

Despite international recognition, few comparison studies examining bullying have been conducted due to methodological differences. Within the US, bullying studies are often conducted in isolation and no consistent prevalence rates have been established (Griffin and Gross in Aggress Violent Behav 9:379-400, 2004). The purpose of this study was to…

Passing Tradition: ACES Presidents, 1940-97.

ERIC Educational Resources Information Center

Sheeley, Vernon Lee

This booklet provides educational, professional, and biographical information on 52 presidents of the Association for Counselor Education and Supervision. A photo of each president is included. All presidents from 1940-1997 are covered. The presidents are: Samuel T. Gladding, Loretta J. Bradley, James V. Wigtil, Barbara Griffin, Joan T. England,…

Parenting, Autism Spectrum Disorders and Inner Journeys

ERIC Educational Resources Information Center

Twomey, Miriam; Shevlin, Michael

2017-01-01

The importance of Early Intervention for children with Autism has been established however little attention has been given to the role of the parent and their perspective (Griffin & Shevlin, 2011). Research on Early Intervention has proliferated and innovative research on involving parents as partners has emerged (Carpenter, 2007; Hornby,…

ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: STORMWATER MANAGEMENT STORMFILTER® TREATMENT SYSTEM USING PERLITE MEDIA

EPA Science Inventory

Verification testing of the Stormwater Management, Inc. StormFilter® Using Perlite Filter Media was conducted on a 0.7 acre drainage basin near downtown Griffin, Georgia. The system consists of an inlet bay, flow spreader, cartridge bay, overflow baffle, and outlet bay, housed in...

5 CFR Appendix A to 5 Cfr Chapter... - Current Addresses and Geographic Jurisdictions

Code of Federal Regulations, 2010 CFR

2010-01-01

...; telephone: FTS or commercial (312) 353-6306; fax: FTS or commercial (312) 886-5977. (5) Dallas, Texas Regional Office—525 Griffin Street, suite 926, LB-107, Dallas, Texas 75202-1906; telephone: FTS or... Francisco Arizona Denver Arkansas Dallas California San Francisco Colorado Denver Connecticut Boston...

5 CFR Appendix A to 5 Cfr Chapter... - Current Addresses and Geographic Jurisdictions

Code of Federal Regulations, 2011 CFR

2011-01-01

...; telephone: FTS or commercial (312) 353-6306; fax: FTS or commercial (312) 886-5977. (5) Dallas, Texas Regional Office—525 Griffin Street, suite 926, LB-107, Dallas, Texas 75202-1906; telephone: FTS or... Francisco Arizona Denver Arkansas Dallas California San Francisco Colorado Denver Connecticut Boston...

Skills for Today: What We Know about Teaching and Assessing Collaboration

ERIC Educational Resources Information Center

Lai, Emily; DiCerbo, Kristen; Foltz, Peter

2017-01-01

Collaboration is increasingly identified as an important educational outcome, and most models of twenty-first-century skills include collaboration as a key skill (e.g., Griffin, McGaw, & Care, 2012; Pellegrino & Hilton, 2012; OECD PISA Collaborative Problem Solving Expert Working Group, 2013; Trilling & Fadel, 2009). Such widespread…

Smoot Cosmology Group

Science.gov Websites

annually at Nasa Ames Research Center, in the heart of Silicon Valley, for 10 weeks of discussions on how _____________________________________________________________________________________ Hawking, NASA Head, Nobel Winners Visit The African Institute for Mathematical Sciences (AIMS) AIMS Stephen Hawking, the NASA Administrator Michael Griffin, and the winners of the 2004 and 2006 Nobel Prizes

Constellation Program Update

NASA Image and Video Library

2006-06-04

Dean Acosta, NASA Deputy Assistant Administrator and Press Secretary, left, moderates a NASA Update with NASA Administrator Michael Griffin, second from left, Scott J. Horowitz, NASA Associate Administrator for Exploration Systems and Jeff Hanley, Constellation Program Manager, right, on Wednesday, June 5, 2006, at NASA Headquarters in Washington. Photo Credit: (NASA/Bill Ingalls)

Space Shuttle Discovery Launch

NASA Image and Video Library

2008-05-31

NASA Administrator, Michael Griffin watches the launch of the Space Shuttle Discovery (STS-124) from the Launch Control Center Saturday, May 31, 2008, at the Kennedy Space Center in Cape Canaveral, Fla. The Shuttle lifted off from launch pad 39A at 5:02 p.m. EDT. Photo Credit: (NASA/Bill Ingalls)

Obama's "Postmodernism," Humanism and History

ERIC Educational Resources Information Center

Peters, Michael A.

2009-01-01

The term "postmodernism" has recently been used to describe President Barack Obama, and not by just one commentator. Jonah Goldberg in a recent USA Today column, the author of "Liberal Fascism," advanced the notion that Obama is a postmodernist. Webster Griffin Tarpley, Bruce Marshall & Jonathon Mowat (2008) have written a book entitled "Obama:…

STS118-S-073

NASA Image and Video Library

2007-08-21

STS118-S-073 (21 Aug. 2007) --- NASA Administrator Michael Griffin (center in white shirt) and other NASA managers give thumbs up signals to the crew of the Space Shuttle Endeavour shortly after its touchdown August 21, 2007, at the Kennedy Space Center, Florida, concluding STS-118. Photo Credit: NASA/Bill Ingalls

Significance of detrital zircons in upper Devonian ocean-basin strata of the Sonora allochthon and Lower Permian synorogenic strata of the Mina Mexico foredeep, central Sonora, Mexico

USGS Publications Warehouse

Poole, F.G.; Gehrels, G.E.; Stewart, John H.

2008-01-01

U-Pb isotopic dating of detrital zircons from a conglomeratic barite sandstone in the Sonora allochthon and a calciclastic sandstone in the Mina Mexico foredeep of the Minas de Barita area reveals two main age groups in the Upper Devonian part of the Los Pozos Formation, 1.73-1.65 Ga and 1.44-1.42 Ga; and three main age groups in the Lower Permian part of the Mina Mexico Formation, 1.93-1.91 Ga, 1.45-1.42 Ga, and 1.1-1.0 Ga. Small numbers of zircons with ages of 2.72-2.65 Ga, 1.30-1.24 Ga, ca. 2.46 Ga, ca. 1.83 Ga, and ca. 0.53 Ga are also present in the Los Pozos sandstone. Detrital zircons ranging in age from 1.73 to 1.65 Ga are considered to have been derived from the Yavapai, Mojave, and Mazatzal Provinces and their transition zones of the southwestern United States and northwestern Mexico. The 1.45-1.30 Ga detrital zircons were probably derived from scattered granite bodies within the Mojave and Mazatzal basement rocks in the southwestern United States and northwestern Mexico, and possibly from the Southern and Eastern Granite-Rhyolite Provinces of the southern United States. The 1.24-1.0 Ga detrital zircons are believed to have been derived from the Grenville (Llano) Province to the east and northeast or from Grenvilleage intrusions or anatectites to the north. Several detrital zircon ages ranging from 2.72 to 1.91 Ga were probably derived originally from the Archean Wyoming Province and Early Paleoproterozoic rocks of the Lake Superior region. These older detrital zircons most likely have been recycled one or more times into the Paleozoic sandstones of central Sonora. The 0.53 Ga zircon is believed to have been derived from a Lower Cambrian granitoid or meta-morphic rock northeast of central Sonora, possibly in New Mexico and Colorado, or Oklahoma. Detrital zircon geochronology suggests that most of the detritus in both samples was derived from Laurentia to the north, whereas some detritus in the Permian synorogenic foredeep sequence was derived from the evolving accretionary wedge to the south. Compositional and sedimentological differences between the continental-rise Los Pozos conglomeratic barite sandstone and the foredeep Mina Mexico calciclastic sandstone imply different depositional and tectonic settings. ?? 2008 The Geological Society of America.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Zhang, Shiyan; Mei, Dajiang, E-mail: meidajiang718@pku.edu.cn; Du, Xin

Ag{sub 1−x}Ga{sub 1−x}Si{sub x}Se{sub 2} solutions with high Si doping level (x=1/2) are considered and new compound AgGaSiSe{sub 4} has been synthesized. It crystallizes in space group Aea2 and possesses very long axis of a=63.06(1)Å. The three-dimensional framework in AgGaSiSe{sub 4} is composed of AgSe{sub 3} trigonal planar units, AgSe{sub 4} tetrahedra and MSe{sub 4}(M=Si, Ga) tetrahedra. AgGaSiSe{sub 4} is a congruently melting compound with the melt temperature of 759 °C. The diffuse reflectance measurements reveal the band gap of 2.63 eV in AgGaSiSe{sub 4} and the value is 0.33 eV larger than that of Ag{sub 3}Ga{sub 3}SiSe{sub 8} (2.30more » eV). - Graphical abstract: The Ag{sub 1−x}Ga{sub 1−x}Si{sub x}Se{sub 2} with high Si doping level (x=1/2) has been studied and the new compound AgGaSiSe{sub 4} was synthesized for the first time. AgGaSiSe{sub 4} crystallizes in a new structure type in space group Aea2 and adopts a three-dimensional framework consisting of AgSe{sub 3} trigonal planar units, AgSe{sub 4} tetrahedra and MSe{sub 4} (M=Si, Ge) tetrahedra. Display Omitted - Highlights: • Study of Ag{sub 1−x}Ga{sub 1−x}Si{sub x}Se{sub 2} with high Si doping level (x=1/2). • Successful synthesis of new compound named AgGaSiSe{sub 4}. • AgGaSiSe{sub 4} crystallizes in space group Aea2 and adopts a three-dimensional framework. • The energy band gap of AgGaSiSe{sub 4} is enlarged compared with Ag{sub 3}Ga{sub 3}SiSe{sub 8}.« less

Changes in the prevalence of breast feeding in preterm infants discharged from neonatal units: a register study over 10 years.

PubMed

Ericson, Jenny; Flacking, Renée; Hellström-Westas, Lena; Eriksson, Mats

2016-12-13

There are indications that the prevalence of exclusively breastfed preterm infants is decreasing in Sweden. The objective was to investigate trends in exclusive breast feeding at discharge from Swedish neonatal units and associated factors in preterm infants. This is a register study with data from the Swedish Neonatal Quality Register. Data from 29 445 preterm infants (gestational age (GA) <37 weeks) who were born during the period 2004-2013 were retrieved. Data included maternal, perinatal and neonatal characteristics. Data were analysed for the whole population as well as for 3 GA groups. From 2004 to 2013, the prevalence of exclusive breast feeding decreased, in extremely preterm (GA 22-27 weeks) from 55% to 16%, in very preterm (GA 28-31 weeks) from 41% to 34% and in moderately preterm infants (GA 32-36 weeks) from 64% to 49%. The decline was statistically significant (p<0.001) in all 3 GA groups. This decline remained significant when adjustments were made for factors negatively associated with exclusive breast feeding and which became more prevalent during the study period, that is, small for GA (all groups) and maternal mental illness (very preterm and moderately preterm infants). In the past 10 years, Sweden has experienced a lower rate of exclusive breast feeding in preterm infants, especially in extremely preterm infants. The factors analysed in this study explain only a small proportion of this decline. The decline in exclusive breast feeding at discharge from neonatal units raises concern and present challenges to the units to support and promote breast feeding. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.

The Sandvik peridotite, Gurskøy, Norway: Three billion years of mantle evolution in the Baltica lithosphere

NASA Astrophysics Data System (ADS)

Lapen, Thomas J.; Medaris, L. Gordon, Jr.; Beard, Brian L.; Johnson, Clark M.

2009-05-01

The Sandvik ultramafic body, Island of Gurskøy, Western Gneiss Region, Norway, is a mantle fragment that contains polymetamorphic mineral assemblages and affords a unique view into the response of subcontinental lithospheric mantle to repeated orogenic/magmatic events. The Sandvik peridotite body and nearby outcrops record four paragenetic stages: 1) pre-exsolution porphyroclasts of ol + grt + opx (high-Ca ) + cpx (low-Ca), which equilibrated at 1100-1200 °C and 6.5-7.0 GPa; 2) kelyphite containing ol + grt + spl +opx (low-Ca) + am (high-Al), as well as exsolved pyroxene containing opx + cpx + spl in equilibrium with matrix olivine, at 725 °C and 1.5 GPa; 3) granoblastic matrix of ol + spl + opx (low-Ca) + am (high-Al), at 700 °C and 1.0 GPa. A nearby outcrop contains a fourth assemblage consisting of ol + chl + opx + am. Lu-Hf and Re-Os model ages of garnet peridotite indicate melt depletion at 3.3 Ga [Beyer, E.E., Brueckner, H.K., Griffin, W.L., O'Reilly, S.Y., Graham, S., 2004. Archean mantle fragments in Proterozoic crust, Western Gneiss Region, Norway. Geology 32, 609-612.; Lapen, T.J., Medaris, L.G. Jr., Johnson, C.M., and Beard, B.L., 2005. Archean to Middle Proterozoic evolution of Baltica subcontinental lithosphere: evidence from combined Sm-Nd and Lu-Hf isotope analyses of the Sandvik ultramafic body, Norway. Contributions to Mineralogy and Petrology 150, 131-145.], marking the time of separation from the convecting mantle. Lu-Hf whole rock and mineral isochron ages of constituent garnet peridotite and garnet pyroxenite layers in the Sandvik body reflect cooling and emplacement at ~ 1.25 Ga and ~ 1.18 Ga, respectively, whereas Sm-Nd whole rock and mineral ages of the garnet pyroxenite layers and the garnet peridotite are consistent with metasomatic alteration at ~ 1.15 Ga [Lapen, T.J., Medaris, L.G. Jr., Johnson, C.M., and Beard, B.L., 2005. Archean to Middle Proterozoic evolution of Baltica subcontinental lithosphere: evidence from combined Sm-Nd and Lu-Hf isotope analyses of the Sandvik ultramafic body, Norway. Contributions to Mineralogy and Petrology 150, 131-145.]. The isochron ages likely record lithospheric modification associated with the 1.25-1.00 Ga Sveconorwegian orogeny and represent the youngest age of the Stage 1 mineral assemblage equilibration. A 606 ± 39 Ma Sm-Nd isochron age of the Stage 2 kelyphite assemblage is consistent with partial re-equilibration of the porphyroclastic assemblage during continental rifting associated with opening of the Iapetus Ocean between Baltica and Laurentia at ~ 600 Ma, or extension between Baltica and Siberia that may have been associated with opening of the Ægir Sea. The age of kelyphite, therefore, places the Sandvik peridotite in the uppermost mantle prior to Silurian shortening between the Baltic and Laurentian continents.

Competition between magnetism and superconductivity in Eu-based intermetallic compounds

NASA Astrophysics Data System (ADS)

Stavinoha, Macy; Green, Lance; Chan, Julia; Morosan, Emilia

Eu-based intermetallic compounds present a path to discover new correlated electronic behavior in quantum materials. Reports of superconductivity, intermediate valence behavior, and heavy fermions indicate that Eu-based compounds are promising routes to study the relationship between crystallography and electronic properties. The present work is focused on EuGa4, an antiferromagnet with TN = 16 K isostructural with the tetragonal RT2M2 (R = rare earth, T = transition metal, M = metal or metalloid) family that exhibits heavy fermion behavior and unconventional superconductivity. Single crystals of the doped series (Eu1-xLax)Ga4, (Eu1-xCax)Ga4, and Eu(Ga1-xAlx)4 have been grown using the self-flux method and tested for change in unit cell volume and magnetic susceptibility. Results show that doping with Ca (isoelectronic doping) and La (hole doping) reduce TN to 12.4 K and 2.3 K, respectively, for Ca doping up to x = 0.11 and La doping up to x = 0.74 without an associated change in unit cell volume. The series Eu(Ga1-xAlx)4 has shown incommensurate-to-commensurate magnetic transitions. Future studies will aim to further decrease TN and the unit cell volume using physical pressure and chemical pressure through doping. ICAM, Gordon and Betty Moore Foundation.

8 CFR 232.2 - Examination in the United States of alien applicants for benefits under the immigration laws and...

Code of Federal Regulations, 2013 CFR

2013-01-01

... Sevices, Centers for Disease Control, Atlanta, GA 30333. (iii) If an alien who if found to be mentally... Quarantine, Center for Prevention Services, Centers for Disease Control, Atlanta, GA 30333, the completed... Prevention Services, Centers for Disease Control, Atlanta, GA 30333. (2) Other aliens. The results of the...

8 CFR 232.2 - Examination in the United States of alien applicants for benefits under the immigration laws and...

Code of Federal Regulations, 2014 CFR

2014-01-01

... Sevices, Centers for Disease Control, Atlanta, GA 30333. (iii) If an alien who if found to be mentally... Quarantine, Center for Prevention Services, Centers for Disease Control, Atlanta, GA 30333, the completed... Prevention Services, Centers for Disease Control, Atlanta, GA 30333. (2) Other aliens. The results of the...

75 FR 17126 - Foreign-Trade Zone 26-Atlanta, Georgia, Application for Expansion and Reorganization under...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-05

..., Jeffersonville (Twiggs County); Site 16 (308 acres) -- Meridian 75 Logistics Center, located at Interstate 75 and Rumble Road, Forsyth (Monroe County); Site 17 (193 acres) -- Majestic Airport Center III, located at... Futral Road, Griffin (Spalding County); Site 9 (321 acres) -- at the Hamilton Mill Business Center...

Women in History--Grace Abbott: A Leader in Social Reform

ERIC Educational Resources Information Center

Hoffman, Shari Cole

2006-01-01

This article profiles Grace Abbott, one of the earlier 20th century American women leaders in Progressivism. Abbott's heritage influenced her lifetime commitment to social improvement. She was born on November 17, 1878 in Grand Island, Nebraska into a family of activists. Her Quaker mother, Elizabeth Griffin Abbott, came from an abolitionist…

Constellation Program Press Conference

NASA Image and Video Library

2006-06-04

NASA Administrator Michael Griffin, left, Scott Horowitz, NASA Associate Administrator for Exploration Systems and Jeff Hanley, Constellation Program Manager, right, are seen during a press conference outlining specific center responsibilities associated with the Constellation Program for robotic and human Moon and Mars exploration, Monday, June 5, 2006, at NASA Headquarters in Washington. Photo Credit (NASA/Bill Ingalls)

Constellation Program Press Conference

NASA Image and Video Library

2006-06-04

Members of the media listen during a press conference with NASA Administrator Michael Griffin, Scott Horowitz, NASA Associate Administrator for Exploration Systems and Jeff Hanley, Constellation Program Manager, outlining specific center responsibilities associated with the Constellation Program for robotic and human Moon and Mars exploration, Monday, June 5, 2006, at NASA Headquarters in Washington. Photo Credit (NASA/Bill Ingalls)

All in This Together

ERIC Educational Resources Information Center

Pierce, Dennis

2016-01-01

As recently as seven or eight years ago, three quarters of the high school graduates in Florida's Seminole County had to take a remedial math class when they got to college, says Seminole County Public Schools Superintendent Griffin. Thanks to a partnership between the school district and Seminole State College of Florida, however, that figure is…

Michigan Severity Rating Scales: Usage and Validity

ERIC Educational Resources Information Center

Emerson, Robert Wall; Anderson, Dawn

2014-01-01

For many years, increasing caseloads for vision professionals have caused concerns about the impact on educational services. Average caseload sizes in the literature have remained fairly consistent across decades, with 19.5 students per professional in the 1980s (Pelton, 1986), 18 students in the 1990s (Griffin-Shirley, McGregor, and Jacobson,…

Fiscal Year 2007 House Budget Hearing

NASA Image and Video Library

2006-02-16

U.S. Rep. Vernon J. Ehlers , R-Mich., left, talks with NASA Administrator Michael Griffin, right, as NASA Deputy Administrator Shana Dale looks on prior to the start of a hearing before the House Science & Technology Committee regarding NASA's FY 2007 budget request, Thursday, Feb., 16, 2006, in Washington. Photo Credit: (NASA/Bill Ingalls)

Tri-Services Coordinated Care (TRICARE) A Study of Change Management.

DTIC Science & Technology

1993-12-01

Organizational Change Within the Navy Medical Department," Navy Comptroller 1, no. 1, September 1990: 9-15. Franks, Frederick, M. and Gary B. Griffin, "The Army’s...the TRICARE Service Center Can Support NAVHOSP," TRICARE Archives, undated, TRICARE Project Office, Norfolk, VA. Espie, John C., " Managing

Character Counts: Don't Leave Home without It!

ERIC Educational Resources Information Center

Education Digest: Essential Readings Condensed for Quick Review, 2011

2011-01-01

Orrs Elementary School in Griffin-Spalding County, Georgia, was selected as a 2010 National School of Character by the Character Education Partnership (CEP) and was honored at the National Forum of Character Education awards ceremony in San Francisco, California. According to Principal Dexter Martin, character education is more than a phrase or a…

The Interactive Effects of Self-Perceptions and Job Requirements on Creative Problem Solving

ERIC Educational Resources Information Center

Robinson-Morral, Erika J.; Reiter-Palmon, Roni; Kaufman, James C.

2013-01-01

Over the years, researchers have focused on ways to facilitate creativity in the workplace by looking at individual factors and organizational factors that affect employee creativity (Woodman, Sawyer, & Griffin, [Woodman, R.W., 1993]). In many cases, the factors that affect creativity are examined independently. In other words, it is uncommon…

Third-Grade Students' Mental Models of Energy Expenditure during Exercise

ERIC Educational Resources Information Center

Pasco, Denis; Ennis, Catherine D.

2015-01-01

Background: Students' prior knowledge plays an important role in learning new knowledge. In physical education (PE) and physical activity settings, studies have confirmed the role of students' prior knowledge. According to Placek and Griffin, these studies demonstrate that: "our students are not empty balls waiting to be filled with knowledge…

Age and correlation of tertiary sediments in the western South Carolina Coastal Plain

DOE Office of Scientific and Technical Information (OSTI.GOV)

Laws, R.A.; Harris, W.B.; Zullo, V.A.

1987-01-01

Integration of coastal onlap stratigraphy, calcareous nannofossil, dinoflagellate, and megafossil biostratigraphy provide new data for interpretation of age and interregional correlation of Paleocene to Oligocene deposits of the western South Carolina Coastal Plain. Clastic and calcareous sediments examined in cores and outcrops in the vicinity of the Savannah River Plant record at least seven coastal onlap cycles. Basal Tertiary sediments of the Ellenton Formation represent cycles TA1.1 - 1.3 and contain dinoflagellates of Midwayan to Sabinian age. The overlying Williamsburg Formation probably represents deposits of cycle TA2.1. The superjacent siliciclastics of the Congaree Formation contain few fossils, but may preservemore » transgressive and highstand deposits of cycles TA2.4 - 3.3. The overlying unit is commonly calcareous, contains nannofossils indicative of zones NP16-17 (Upper Claibornian), and marks a significant change in depositional style subsequent to the 49.5 Ma eustatic fall. ''Marls'' of the overlying Griffins Landing Member of the Dry Branch Formation contain micro- and megafossils of Late Eocene (Jacksonian) age and represent transgressive deposits of cycle TA4.1. The discontinuous lateral distribution of these calcareous units and overlying clastics of the Dry Branch and Tobacco Road Formations results largely from erosion and deep incision during the mid-Oligocene eustatic fall (30 Ma). The ''Upland'' unit is interpreted as being deposited on this erosional surface.« less

In the Hot Seat: STS-115 Lightning Strike Stand Down Debate - NASA Case Study

NASA Technical Reports Server (NTRS)

Kummer, Lizette; Stevens, Jennifer

2016-01-01

There is no way the PIC's could have seen any current' was the gist of Mike Griffin's assessment. Griffin was the NASA Administrator at the time. The buck stopped at his desk. Holding a napkin out to Pat Lampton, Griffin showed Lampton the calculations he'd made over dinner that predicted that the Pyrotechnic Initiator Controllers (PIC's) at the base of the Space Shuttle Solid Rocket Boosters (SRBs) were fine. A lightning strike the day before, the worst ever experienced with a Space Shuttle on the launch pad, caused a halt to the launch count down as technicians, engineers, and managers scrambled identify any damage to the launch system. SRB technicians and engineers assessed the data against their Lightning Strike Re-Test Requirements, determining that all but one of the requirements could be checked if they resumed the countdown. For the one remaining requirement, testing the integrity of the PIC's would require 96 hours to set up, test, and reassemble. The engineers were convinced that there was no way to do calculations to show the PIC's were okay. The only option was to stand down. It was SRB Deputy Project Manager (PM) Pat Lampton's responsibility to decide what the SRB project position needed to be to certify that their hardware was safe to fly. He had to communicate that decision to the Mission Management Team (MMT) as a Go or No Go position to resume the count down. If the answer was Go they could still meet a delayed, but acceptable launch schedule. If the answer was No Go, rescheduling the launch would be a grueling shuffling of hardware, personnel, and mission timelines to accommodate Russian missions to the Space Station, supplies for the launch, and personnel manning launch operations. On top of that, Hurricane Ernesto was spinning off the coast of Florida, threatening the need for the Shuttle to roll back to the hangar if they waited too long.

Plasma steroid concentrations and male phallus size in juvenile alligators from seven Florida lakes

USGS Publications Warehouse

Guillette, L.J.; Woodward, A.R.; Crain, D.A.; Pickford, D.B.; Rooney, A.A.; Percival, H.F.

1999-01-01

Neonatal and juvenile alligators from contaminated Lake Apopka in central Florida exhibit abnormal plasma sex steroid concentrations as well as morphological abnormalities of the gonad and phallus. This study addresses whether similar abnormalities occur in juvenile alligators inhabiting six other lakes in Florida. For analysis, animals were partitioned into two subsets, animals 40-79 cm total length (1-3 years old) and juveniles 80-130 cm total length (3-7 years old). Plasma testosterone (T) concentrations were lower in small males from lakes Apopka, Griffin, and Jessup than from Lake Woodruff National Wildlife Refuge (NWR). Similar differences were observed in the larger juveniles, with males from lakes Jessup, Apopka, and Okeechobee having lower plasma T concentrations than Lake Woodruff males. Plasma estradiol-17?? (E2) concentrations were significantly elevated in larger juvenile males from Lake Apopka compared to Lake Woodruff NWR. When compared to small juvenile females from Lake Woodruff NWR, females from lakes Griffin, Apopka, Orange, and Okeechobee had elevated plasma E2 concentrations. Phallus size was significantly smaller in males from lakes Griffin and Apopka when compared to males from Lake Woodruff NWR. An association existed between body size and phallus size on all lakes except Lake Apopka and between phallus size and plasma T concentration on all lakes except lakes Apopka and Orange. Multiple regression analysis, with body size and plasma T concentration as independent covariables, explained the majority of the variation in phallus size on all lakes. These data suggest that the differences in sex steroids and phallus size observed in alligators from Lake Apopka are not limited to that lake, nor to one with a history of a major pesticide spill. Further work examining the relationship of sex steroids and phallus size with specific biotic and abiotic factors, such as antiandrogenic or estrogenic contaminants, is needed.

Electronic Characteristics of Rare Earth Doped GaN Schottky Diodes

DTIC Science & Technology

2013-03-21

REPORT TYPE Master’s Thesis 3. DATES COVERED (From – To) 04 Sep 2011 - Mar 2013 4. TITLE AND SUBTITLE ELECTRONIC CHARACTERISTICS OF RARE EARTH ...ELECTRONIC CHARACTERISTICS OF RARE EARTH DOPED GaN SCHOTTKY DIODES THESIS Aaron B. Blanning...United States. AFIT-ENP-13-M-03 Electronic Characteristics of Rare Earth Doped GaN Schottky Diodes THESIS Presented to the Faculty

Free-Volume Nanostructurization in Ga-Modified As2Se3 Glass.

PubMed

Shpotyuk, Ya; Ingram, A; Shpotyuk, O; Dziedzic, A; Boussard-Pledel, C; Bureau, B

2016-12-01

Different stages of intrinsic nanostructurization related to evolution of free-volume voids, including phase separation, crystalline nuclei precipitation, and growth, were studied in glassy As2Se3 doped with Ga up to 5 at. %, using complementary techniques of positron annihilation lifetime spectroscopy, X-ray powder diffraction, and scanning electron microscopy with energy-dispersive X-ray analysis. Positron lifetime spectra reconstructed in terms of a two-state trapping model testified in favor of a native void structure of g-As2Se3 modified by Ga additions. Under small Ga content (below 3 at. %), the positron trapping in glassy alloys was dominated by voids associated with bond-free solid angles of bridging As2Se4/2 units. This void agglomeration trend was changed on fragmentation with further Ga doping due to crystalline Ga2Se3 nuclei precipitation and growth, these changes being activated by employing free volume from just attached As-rich glassy matrix with higher content of As2Se4/2 clusters. Respectively, the positron trapping on free-volume voids related to pyramidal AsSe3/2 units (like in parent As2Se3 glass) was in obvious preference in such glassy crystalline alloys.

Reliability of self-aligned, ledge passivated 7.5 GHz GaAs/AlGaAs HBT power amplifiers under RF bias stress at elevated temperatures

DOE Office of Scientific and Technical Information (OSTI.GOV)

Henderson, T.S.; Ikalainen, P.K.

1995-12-31

The authors report a two-temperature RF bias stress test on nominal 1.2 W 7.5 GHz GaAs/AlGaAs HBT unit cell amplifiers. MTTF`s of 2020 and 1340 hours were obtained at Tj = 218{degrees}C and 245{degrees}C, respectively, under nominal input bias. An activation energy of 0.42 eV is estimated, consistent with published results for similar devices under DC bias stress.

Investigation of the Effect of Temperature During Off-State Degradation of AlGaN/GaN High Electron Mobility Transistors

DTIC Science & Technology

2011-09-01

oxidation of GaN has shown the formation of b- Ga2O3 , a stable poly- morph with a monoclinic structure, and can be assumed to be one possible oxide formed...oti relation given by, a ¼ 3ðr 1Þ0ðr þ 2ÞNV ð4Þ where r is the relative dielectric constant for Ga2O3 (14.2) and NV is the number of molecules...per unit volume (2.07 1022 cm3) giving a molecular polarizability for Ga2O3 of 5.96 1017 e cm2/V. The to- tal molecular polarizability is

A binary-decision-diagram-based two-bit arithmetic logic unit on a GaAs-based regular nanowire network with hexagonal topology.

PubMed

Zhao, Hong-Quan; Kasai, Seiya; Shiratori, Yuta; Hashizume, Tamotsu

2009-06-17

A two-bit arithmetic logic unit (ALU) was successfully fabricated on a GaAs-based regular nanowire network with hexagonal topology. This fundamental building block of central processing units can be implemented on a regular nanowire network structure with simple circuit architecture based on graphical representation of logic functions using a binary decision diagram and topology control of the graph. The four-instruction ALU was designed by integrating subgraphs representing each instruction, and the circuitry was implemented by transferring the logical graph structure to a GaAs-based nanowire network formed by electron beam lithography and wet chemical etching. A path switching function was implemented in nodes by Schottky wrap gate control of nanowires. The fabricated circuit integrating 32 node devices exhibits the correct output waveforms at room temperature allowing for threshold voltage variation.

Structure of (Ga2O3)2(ZnO)13 and a unified description of the homologous series (Ga2O3)2(ZnO)(2n + 1).

PubMed

Michiue, Yuichi; Kimizuka, Noboru; Kanke, Yasushi; Mori, Takao

2012-06-01

The structure of (Ga(2)O(3))(2)(ZnO)(13) has been determined by a single-crystal X-ray diffraction technique. In the monoclinic structure of the space group C2/m with cell parameters a = 19.66 (4), b = 3.2487 (5), c = 27.31 (2) Å, and β = 105.9 (1)°, a unit cell is constructed by combining the halves of the unit cell of Ga(2)O(3)(ZnO)(6) and Ga(2)O(3)(ZnO)(7) in the homologous series Ga(2)O(3)(ZnO)(m). The homologous series (Ga(2)O(3))(2)(ZnO)(2n + 1) is derived and a unified description for structures in the series is presented using the (3+1)-dimensional superspace formalism. The phases are treated as compositely modulated structures consisting of two subsystems. One is constructed by metal ions and another is by O ions. In the (3 + 1)-dimensional model, displacive modulations of ions are described by the asymmetric zigzag function with large amplitudes, which was replaced by a combination of the sawtooth function in refinements. Similarities and differences between the two homologous series (Ga(2)O(3))(2)(ZnO)(2n + 1) and Ga(2)O(3)(ZnO)(m) are clarified in (3 + 1)-dimensional superspace. The validity of the (3 + 1)-dimensional model is confirmed by the refinements of (Ga(2)O(3))(2)(ZnO)(13), while a few complex phenomena in the real structure are taken into account by modifying the model.

Extended history of a 3.5 Ga trondhjemitic gneiss, Wyoming Province, USA: Evidence from U-Pb systematics in zircon

USGS Publications Warehouse

Mueller, P.A.; Wooden, J.L.; Mogk, D.W.; Nutman, A.P.; Williams, I.S.

1996-01-01

The Beartooth-Bighorn magmatic zone (BBMZ) and the Montana metasedimentary province (MMP) are two major subprovinces of the Archean Wyoming province. In the northwestern Beartooth Mountains, these subprovinces are separated by a structurally, lithologically and metamorphically complex assemblage of lithotectonic units that include: (1) a strongly deformed complex of trondhjemitic gneiss and interlayered amphibolites; and (2) an amphibolite facies mafic unit that occurs in a nappe that structurally overlies the gneiss complex. Zircons from a trondhjemitic blastomylonite in the gneiss complex yield concordant U-Pb ages of 3.5 Ga, establishing it as the oldest rock yet documented in the Wyoming province. Two younger events are also recorded by zircons in this rock: (1) an apparently protracted period of high-grade metamorphism and/or intrusion of additional magmas at ??? 3.25 Ga; and (2) growth of hydrothermal zircon at ??? 2.55 Ga, apparently associated with ductile deformation that immediately preceded structural emplacement of the gneiss. Although this latter event appears confined to areas along the BBMZ-MMP boundary, evidence of ??? 3.25 Ga igneous activity is found in the overlying amphibolite (3.24 Ga) and throughout the MMP. These data suggest that this boundary first developed as a major intracratonic zone of displacement at or before 3.25 Ga. The limited occurrences of 2.8 Ga magmatic activity in the MMP suggest that it had a controlling influence on late Archean magmatism as well.

Redox state of the Archean mantle: Evidence from V partitioning in 3.5-2.4 Ga komatiites

NASA Astrophysics Data System (ADS)

Nicklas, Robert W.; Puchtel, Igor S.; Ash, Richard D.

2018-02-01

Oxygen fugacity of the mantle is a crucial thermodynamic parameter that controls such fundamental processes as planetary differentiation, mantle melting, and possible core-mantle exchange. Constraining the evolution of the redox state of the mantle is of paramount importance for understanding the chemical evolution of major terrestrial reservoirs, including the core, mantle, and atmosphere. In order to evaluate the secular evolution of the redox state of the mantle, oxygen fugacities of six komatiite systems, ranging in age from 3.48 to 2.41 Ga, were determined using high-precision partitioning data of the redox-sensitive element vanadium between liquidus olivine, chromite and komatiitic melt. The calculated oxygen fugacities range from -0.11 ± 0.30 ΔFMQ log units in the 3.48 Ga Komati system to +0.43 ± 0.26 ΔFMQ log units in the 2.41 Ga Vetreny system. Although there is a slight hint in the data for an increase in the oxygen fugacity of the mantle between 3.48 and 2.41 Ga, these values generally overlap within their respective uncertainties; they are also largely within the range of oxygen fugacity estimates for modern MORB lavas of +0.60 ± 0.30 ΔFMQ log units that we obtained using the same technique. Our results are consistent with the previous findings that argued for little change in the mantle oxygen fugacity since the early Archean and indicate that the mantle had reached its nearly-present day redox state by at least 3.48 Ga.

76 FR 16819 - Notice Pursuant to the National Cooperative Research and Production Act of 1993-Consortium for...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-25

... commercialized. Additional information concerning the CEED can be obtained from Mr. Darold L. Griffin, Executive...: [email protected] ; Mr. Charles McBride, President, CEED, 1140 Connecticut Avenue, NW., Suite 1050, Washington, DC 20036, telephone (202) 466-4210, fax (202) 466-4213, e-mail: [email protected] ; Mr. James W...

Grain, silage and forage sorghum hybrid resistance to insect and bird damage, 2017

USDA-ARS?s Scientific Manuscript database

A total of 32 grain and 30 forage type sorghum hybrids were evaluated for resistance to insect, disease, and bird damage in Tifton, Georgia. These hybrids plus 33 silage type and 5 pearl millet hybrids also were evaluated for sugarcane aphid resistance near Griffin, Georgia. A total of 10 insect pes...

78 FR 20091 - Foreign-Trade Zone 26-Atlanta, Georgia, Authorization of Production Activity, Perkins Shibaura...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-03

... DEPARTMENT OF COMMERCE Foreign-Trade Zones Board [B-90-2012] Foreign-Trade Zone 26--Atlanta, Georgia, Authorization of Production Activity, Perkins Shibaura Engines, LLC (Diesel Engines), Griffin, Georgia On November 29, 2012, Georgia Foreign-Trade Zone, Inc., grantee of FTZ 26, submitted a notification of proposed production activity to the...

Moving beyond the College-Preparatory High School Model to a College-Going Culture in Urban Catholic High Schools

ERIC Educational Resources Information Center

Aldana, Ursula S.

2014-01-01

A college-going culture has been found to improve academic outcomes for underrepresented high school students (Allen, Kimura-Walsh, & Griffin, 2009; Stanton-Salazar, 2010). The research on Catholic high schools shows their college-preparatory environment ability to produce successful outcomes for African-American and Latino students (Bryk,…

75 FR 16754 - Taking and Importing Marine Mammals; Taking of Marine Mammals Incidental to Conducting Precision...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-02

... the Small Diameter Bomb (SDB) exercise under the PSW LOA. Three Griffin\\TM\\ SOPGM system missiles with..., taking of small numbers of marine mammals by U.S. citizens who engage in a specified activity (other than... (Public Law 108-136) removed the ``small numbers'' and ``specified geographical region'' limitations and...

Constellation Program Update

NASA Image and Video Library

2006-06-04

NASA Administrator Michael Griffin, left, Scott J. Horowitz, NASA Associate Administrator for Exploration Systems and Jeff Hanley, Constellation Program Manager, right, announce to NASA employees and members of the media the responsibilities of the NASA centers associated with the Constellation Program for robotic and human Moon and Mars exploration on Wednesday, June 5, 2006, at NASA Headquarters in Washington. Photo Credit: (NASA/Bill Ingalls)

Constellation Program Press Conference

NASA Image and Video Library

2006-06-04

Dean Acosta, NASA Deputy Assistant Administrator and Press Secretary, moderates a press conference with NASA Administrator Michael Griffin Scott Horowitz, NASA Associate Administrator for Exploration Systems and Jeff Hanley, Constellation Program Manager, outlining specific center responsibilities associated with the Constellation Program for robotic and human Moon and Mars exploration, Monday, June 5, 2006, at NASA Headquarters in Washington. Photo Credit (NASA/Bill Ingalls)

ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: STORMWATER SOURCE AREA TREATMENT DEVICE; PRACTICAL BEST MANAGEMENT OF GEORGIA, INC., CRYSTALSTREAM� WATER QUALITY VAULT MODEL 1056

EPA Science Inventory

Verification testing of the Practical Best Management, Inc., CrystalStream™ stormwater treatment system was conducted over a 15-month period starting in March, 2003. The system was installed in a test site in Griffin, Georgia, and served a drainage basin of approximately 4 ...

House Hearing Nunn-McCurdy Review of NPOESS

NASA Image and Video Library

2006-06-08

NASA Administrator Michael Griffin, testifies before the House Committee on Science and Technology regarding the future of the National Polar-orbiting Operational Environmental Satellite System (NPOESS) and results of the Nunn-McCurdy review of NOAA’s weather satellite program, Thursday, June 8, 2006, at the Rayburn House Office Building in Washington. Photo Credit: (NASA/Bill Ingalls)

AFRRI (Armed Forces Radiobiology Research Institute) Reports, October-December 1989

DTIC Science & Technology

1989-02-01

lack receptors for rhGM-CSF [16]. t.:is timu- (201. In contrast. Antman et al. reported that in patients with lation is likely to be mediated through...O*Hara PJ. Berkner K. Segal GM. Hagen FS. 22. Antman KS. Griffin JD. Elias A. Socinski M1A. Ryan L, Can- Adamson 1W 11986) Genomic cloning

Using Critical Incident Reporting to Promote Objectivity and Self-Knowledge in Pre-Service School Psychologists

ERIC Educational Resources Information Center

Griffin, Maureen L.; Scherr, Tracey G.

2010-01-01

This longitudinal project consisted of exploring the usefulness of Critical Incident Reporting (CIR) as an instructional tool (Griffin, 2003) to first increase objectivity and self-knowledge among practicum students and then to guide practices when those students became interns the following academic year. Analysis included 120 CIRs written by 15…

Clarification and Purpose of the Race-Based Traumatic Stress Injury Model

ERIC Educational Resources Information Center

Carter, Robert T.

2007-01-01

The author responds to the four reactions authored by Thompson-Miller and Feagin, Griffin, Speight, and Bryant-Davis in this issue. In responding, he clarifies the purpose of the model presented in his major contribution and adds information about the model's legal and forensic applications that he did not touch on with any detail. He also…

Two new phases in the ternary RE-Ga-S systems with the unique interlinkage of GaS4 building units: synthesis, structure, and properties.

PubMed

Lin, Hua; Shen, Jin-Ni; Zhu, Wei-Wei; Liu, Yi; Wu, Xin-Tao; Zhu, Qi-Long; Wu, Li-Ming

2017-10-17

Two novel ternary rare-earth chalcogenides, Yb 6 Ga 4 S 15 and Lu 5 GaS 9 , have been prepared by solid-state reactions of an elemental mixture at high temperatures. Their structures were determined on the basis of single-crystal X-ray diffraction. Yb 6 Ga 4 S 15 crystallizes in the monoclinic space group C2/m (no.12) [a = 23.557(2) Å, b = 3.7664(4) Å, c = 12.466(1) Å, β = 90.915(9)°, V = 1105.9(2) Å 3 and Z = 2], whereas Lu 5 GaS 9 crystallizes in the triclinic space group P1[combining macron] (no.2) [a = 7.735(3) Å, b = 10.033(4) Å, c = 10.120(4) Å, α = 106.296(4)°, β = 100.178(5)°, γ = 101.946(3)°, V = 714.1(5) Å 3 and Z = 2]. Both the structures feature complicated three dimensional frameworks with the unique interlinkages of GaS 4 as basic building units. Significantly, photo-electrochemical measurements indicated that title compounds were photoresponsive under visible-light illumination. Furthermore, the UV-visible-near IR diffuse reflectance spectra, thermal stabilities, electronic structures, physical properties as well as a structure change trend of the ternary rare-earth/gallium/sulfur compounds have been evaluated.

Finding of No Significant Impact (FONSI) and Finding of No Practicable Alternative (FONPA) for the Stone Road Widening Environmental Assessment, Moody AFB, GA

DTIC Science & Technology

2004-10-18

No Practicable Alternative (FONPA) for the Stone Road Widening Environmental Assessment, Moody AFB, GA 18 Oct 04 SUMMARY l. PURPOSE: Acquire AFSOC...AFB, GA 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER 7...PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 347th Civil Engineer Squadron (347 CES/CEV),3485 Georgia Street,Moody AFB, GA ,31699 8. PERFORMING

Insertion of GaAs MMICs into EW systems

NASA Astrophysics Data System (ADS)

Schineller, E. R.; Pospishil, A.; Grzyb, J.

1989-09-01

Development activities on a microwave/mm-wave monolithic IC (MIMIC) program are described, as well as the methodology for inserting these GaAs IC chips into several EW systems. The generic EW chip set developed on the MIMIC program consists of 23 broadband chip types, including amplifiers, oscillators, mixers, switches, variable attenuators, power dividers, and power combiners. These chips are being designed for fabrication using the multifunction self-aligned gate process. The benefits from GaAs IC insertion are quantified by a comparison of hardware units fabricated with existing MIC and digital ECL technology and the same units manufactured with monolithic technology. It is found that major improvements in cost, reliability, size, weight, and performance can be realized. Examples illustrating the methodology for technology insertion are presented.

Life on Earth before 3.83 Ga? Carbonaceous Inclusions from Akilia (West Greenland)

NASA Astrophysics Data System (ADS)

Mojzsis, S. J.; Papineau, D.; Adam, J. D.; Harrison, T. M.

2005-12-01

The earliest records of life on Earth have been obscured by the intense metamorphism experienced by all known terranes older than ca. 3600 Ma; fragile microfossil shapes become obliterated, and chemical/isotopic biosignatures are potentially blurred, overprinted, mimicked or erased. Prior studies sought to overcome this dilemma utilizing chemofossils ~ biosignatures resistant to physical and chemical change since formation ~ in the search for possible traces of a biosphere in pre-3.8 Ga rocks. Interpreting the geology, age and origin of the oldest rocks is fraught with difficulty, yet new field- and laboratory-based techniques permit direct assessment of proposed evidence for early life in the >3.83 Ga paragneisses of the Akilia association in southern West Greenland. A comprehensive program of sampling guided by 1:100 scale mapping of these highly deformed units coupled with structural, geochemical and geochronological analyses, provides a basis for understanding of the petrogenesis of the Akilia rocks (Manning et al., in press). The new studies resolve existing controversies over this complex terrane and (i) corroborate a sedimentary rather than metasomatic origin for Fe-rich quartz pyroxene ( Aqp) units as supported by separate trace element, REE, δ18O, δ33S/δ34S and δ56Fe isotope studies; (ii) validate a >3.83 Ga age for Aqp units on Akilia and related units in southern West Greenland as among the oldest known rocks of sedimentary origin; and (iii) verify the presence of apatite-hosted graphite in Aqp units (cf. Lepland et al., 2005; Moorbath, 2005). This growing list of results lend support to our original interpretation (Mojzsis et al., 1996) that the simplest explanation for depleted 13C in carbonaceous inclusions in apatite from Akilia is that life had emerged on Earth prior to 3.83 Ga. Manning, C.E., Mojzsis, S.J. and Harrison, T.M. (2005) Geology, age and origin of supracrustal rocks, Akilia, Greenland (Amer. J. Sci. in press).

Does Spatial or Visual Information in Maps Facilitate Text Recall?: Reconsidering the Conjoint Retention Hypothesis

ERIC Educational Resources Information Center

Griffin, Marlynn M.; Robinson, Daniel H.; Sarama, Julie

2005-01-01

The conjoint retention hypothesis (CRH) claims that students recall more text information when they study geographic maps in addition to text than when they study text alone, because the maps are encoded spatially (Kulhavy, Lee, & Caterino, 1985). This claim was recently challenged by Griffin and Robinson (2000), who found no advantage for maps…

The Calculus of Yes and No: How One Professor Makes Decisions about Academic Service

ERIC Educational Resources Information Center

Griffin, Kimberly A.

2013-01-01

In this article, the author, Kimberly A. Griffin, a faculty member at a research-intensive institution, reflects on what has guided her decision to say "yes" or "no" when requests for academic service are presented. She reports she is evaluated on how much she engages in research, teaching, and service, and that tenure and…

Proceedings of the Annual Meeting of the Association for Education in Journalism and Mass Communication (81st, Baltimore, Maryland, August 5-8, 1998). Communication Theory and Methodology.

ERIC Educational Resources Information Center

Association for Education in Journalism and Mass Communication.

The Communication Theory and Methodology section of the Proceedings contains the following 20 papers: "Information Sufficiency and Risk Communication" (Robert J. Griffin, Kurt Neuwirth, and Sharon Dunwoody); "The Therapeutic Application of Television: An Experimental Study" (Charles Kingsley); "A Path Model Examining the…

Using the Concrete-Representational-Abstract Sequence and the Strategic Instruction Model to Teach Computation to Students with Autism Spectrum Disorders and Developmental Disabilities

ERIC Educational Resources Information Center

Flores, Margaret M.; Hinton, Vanessa M.; Strozier, Shaunita D.

2014-01-01

There is a need for further investigation of evidence-based practices for students with autism spectrum disorders and developmental disabilities leading to students' success within the general education curriculum (Cihak & Foust, 2008; Rockwell, Griffin, & Jones, 2011; Schaefer-Whitby, Travers, & Harnik, 2009). The purpose of this…

Navy Littoral Combat Ship (LCS)/Frigate Program: Background and Issues for Congress

DTIC Science & Technology

2016-04-18

each shipyard will deliver an LCS, on average, every six months for the remainder of the block buy. LCS 5 and 6 delivered with the fewest trial cards ...News (http://news.usni.org), April 9, 2014; Mike McCarthy, “LCS Program Dumping Griffin Missile In Favor Of Army’s Longbow,” Defense Daily, April 10

Constellation Program Update

NASA Image and Video Library

2006-06-04

Jeff Hanley, Constellation Program Manager, right, announces to NASA employees and members of the media the responsibilities of the NASA centers associated with the Constellation Program for robotic and human Moon and Mars exploration on Wednesday, June 5, 2006, at NASA Headquarters in Washington. Hanley is joined by Scott J. Horowitz, NASA Associate Administrator for Exploration Systems and NASA Administrator Michael Griffin, left. Photo Credit: (NASA/Bill Ingalls)

Constellation Program Update

NASA Image and Video Library

2006-06-04

NASA Administrator Michael Griffin, left, announces to NASA employees and members of the media the responsibilities of the NASA centers associated with the Constellation Program for robotic and human Moon and Mars exploration on Wednesday, June 5, 2006, at NASA Headquarters in Washington. He is joined by Scott J. Horowitz, NASA Associate Administrator for Exploration Systems and Jeff Hanley, Constellation Program Manager, right. Photo Credit: (NASA/Bill Ingalls)

Constellation Program Update

NASA Image and Video Library

2006-06-04

Scott J. Horowitz, NASA Associate Administrator for Exploration Systems, center, announces to NASA employees and members of the media the responsibilities of the NASA centers associated with the Constellation Program for robotic and human Moon and Mars exploration on Wednesday, June 5, 2006, at NASA Headquarters in Washington. Horowitz was joined by NASA Administrator Michael Griffin, left, and Jeff Hanley, Constellation Program Manager. Photo Credit: (NASA/Bill Ingalls)

A Master Trainer Class for Professionals in Teaching the UltraCane Electronic Travel Device

ERIC Educational Resources Information Center

Penrod, William; Corbett, Michael D.; Blasch, Bruce

2005-01-01

Electronic travel devices are used to transform information about the environment that would normally be perceived through the visual sense into a form that can be perceived by people who are blind or have low vision through another sense (Blasch, Long, & Griffin-Shirley, 1989). They are divided into two broad categories: primary devices and…

Hiring the Next Generation of Faculty. New Directions for Community Colleges, Number 152

ERIC Educational Resources Information Center

Cejda, Brent D., Ed.; Murray, John P., Ed.

2011-01-01

This volume contains the following papers: (1) Preparing to Hire the Best in the Perfect Storm (John P. Murray); (2) New Faculty Issues: Fitting In and Figuring It Out (Pamela L. Eddy); (3) An Approach to a Faculty Professional Development Seminar (Mary Bendickson and Karen Griffin); (4) Faculty Issues in Rural Community Colleges (Brent D. Cejda);…

Aerospace Medicine and Biology: A Continuing Bibliography with Indexes

DTIC Science & Technology

1987-09-01

drug against motion sickness more closely than any other medication. Author A87-35422 THE USE OF EXTRACORPOREAL SHOCK WAVE LITHOTRIPSY IN AVIATORS A87...diagnosis and treatment Denmark) Aviation, Space, and Environmental Medicine (ISSN Extracorporeal shock wave lithotripsy (ESWL) has recently become 0095...and M. J. GRIFFIN ( Southampton , University, functional mechanisms are insufficient. Solutions are discussed England) Aviation, Space, and Environmental

Global Security, Religion and Education Development: A Crisis for the Field of Comparative Education?

ERIC Educational Resources Information Center

Sayed, Yusuf; Davies, Lynn; Hardy, Mike; Arani, Abbas Madandar; Kakia, Lida; Bano, Masooda

2011-01-01

The above title was suggested by the editors of this journal as being an interesting topic for a forum. It is indeed a valuable one to explore, in that while there has been extensive writing on various connections between security, religion and education (e.g. Apple 2004; Griffin 2006; Merry 2007; Davies 2008), situating this within comparative…

Substrate Variations and its Relationship and Impact on the Distribution of Eelgrass Beds in Griffin Bay, Washington

NASA Astrophysics Data System (ADS)

Sopha, A.; Greene, H.; Wyllie-Echeverria, S.; Harmsen, F. J.

2010-12-01

Eelgrass is considered an important indicator species for the health of the oceans; it provides nearshore habitat to many marine organisms and also acts as a source of protection for migrating populations of juvenile salmon and other fish species including forage fish. Since the late 1980s, there has been a drastic decline in eelgrass beds within the surrounding marine areas of Washington State; specifically in the species Zostera marina. Previous studies have focused on potential impacts such as bacterial infections and loss of sunlight from docks, shoreline tree canopy overgrowth and permanently anchored boats. In specific locations, sawmill waste has prevented the regeneration of eelgrass. In this study, sediment samples, along with video transects, were collected from Griffin Bay, Washington, located within the San Juan Archipelago to determine if substrate conditions have any impact on the distribution, appearance, disappearance, and health of the eelgrass beds. Initial findings indicate that in fact, eelgrass is increasing with growth beyond the area in which their distribution was previously documented. This is in contrast to other areas where eelgrass is in decline. Final results have yet to be analyzed.

KSC-05PD-1761

NASA Technical Reports Server (NTRS)

2005-01-01

KENNEDY SPACE CENTER, FLA. In the Launch Control Center at NASA Kennedy Space Center, NASA Administrator Mike Griffin (left) presents a gift to Columba Bush, wife of the Florida Governor Jeb Bush, to her left. First Lady Laura Bush, next to Griffin, is one of the distinguished guests who attended the historic launch of Space Shuttle Discovery on Return to Flight mission STS-114. At far left is Center Director Jim Kennedy. The First Lady congratulated the launch team for their success. On this mission to the International Space Station the crew will perform inspections on-orbit for the first time of all of the Reinforced Carbon-Carbon (RCC) panels on the leading edge of the wings and the Thermal Protection System tiles using the new Canadian-built Orbiter Boom Sensor System and the data from 176 impact and temperature sensors. Mission Specialists will also practice repair techniques on RCC and tile samples during a spacewalk in the payload bay. During two additional spacewalks, the crew will install the External Stowage Platform-2, equipped with spare part assemblies, and a replacement Control Moment Gyroscope contained in the Lightweight Multi-Purpose Experiment Support Structure. The 12-day mission is expected to end with touchdown at the Shuttle Landing Facility on Aug. 7.

Quality of life considered as well-being: views from philosophy and palliative care practice.

PubMed

Olthuis, Gert; Dekkers, Wim

2005-01-01

The main measure of quality of life is well-being. The aim of this article is to compare insights about well-being from contemporary philosophy with the practice-related opinions of palliative care professionals. In the first part of the paper two philosophical theories on well-being are introduced: Sumner's theory of authentic happiness and Griffin's theory of prudential perfectionism. The second part presents opinions derived from interviews with 19 professional palliative caregivers. Both the well-being of patients and the well-being of the carers themselves are considered in this empirical exploration. In the third part the attention shifts from the description of "well-being" to prescriptions for the promotion of well-being. Our interview data are analysed in light of the theories of Sumner and Griffin for clues to the promotion of "well-being." The analysis (1) underscores the subject-relativity of well-being, (2) points out that values that are considered important in every life still seem to be relevant (at least in palliative care practice), and (3) shows the importance of living a certain sort of life when aiming to enhance dying patients' well-being.

Effects of egg and hatchling harvest on American alligators in Florida

USGS Publications Warehouse

Rice, K.G.; Percival, H.F.; Woodward, A.R.; Jennings, Michael L.

1999-01-01

Harvest of crocodilian eggs and young for captive rearing (ranching) has been used worldwide as an option for producing crocodilian skins and meat from wild stock. The long-term effects of harvesting a certain proportion of early age class, wild American alligators (Alligator mississippiensis) without repatriation is unknown. We removed an estimated 50% of annual production of alligators on Lakes Griffin and Jesup in central Florida over an 11-year period and monitored population levels via night-light counts. Densities of the total alligator population increased (P 0.117), and subadult (122-182 cm TL) alligators increased (P < 0.011) on harvest areas. The density of juveniles on the control area increased (P = 0.006), and the density of subadults showed some evidence of increasing (P = 0.088). No changes were detected in size distributions on the treatment areas. Nest production, as observed from aerial helicopter surveys, increased (P < 0.039) on Lake Woodruff NWR and Lake Jesup and showed some evidence of an increase on Lake Griffin (P = 0.098) during 1983-91. A 50% harvest rate of eggs or hatchlings did not adversely affect recruitment into the subadult or adult size classes.

White light emission of monolithic InGaN/GaN grown on morphology-controlled, nanostructured GaN templates.

PubMed

Song, Keun Man; Kim, Do-Hyun; Kim, Jong-Min; Cho, Chu-Young; Choi, Jehyuk; Kim, Kahee; Park, Jinsup; Kim, Hogyoug

2017-06-02

We demonstrated an InGaN/GaN-based, monolithic, white light-emitting diode (LED) without phosphors by using morphology-controlled active layers formed on multi-facet GaN templates containing polar and semipolar surfaces. The nanostructured surface morphology was controlled by changing the growth time, and distinct multiple photoluminescence peaks were observed at 360, 460, and 560 nm; these features were caused by InGaN/GaN-based multiple quantum wells (MQWs) on the nanostructured facets. The origin of each multi-peak was related to the different indium (In) compositions in the different planes of the quantum wells grown on the nanostructured GaN. The emitting units of MQWs in the LED structures were continuously connected, which is different from other GaN-based nanorod or nanowire LEDs. Therefore, the suggested structure had a larger active area. From the electroluminescence spectrum of the fabricated LED, monolithic white light emission with CIE color coordinates of x = 0.306 and y = 0.333 was achieved via multi-facet control combined with morphology control of the metal organic chemical vapor deposition-selective area growth of InGaN/GaN MQWs.

White light emission of monolithic InGaN/GaN grown on morphology-controlled, nanostructured GaN templates

NASA Astrophysics Data System (ADS)

Song, Keun Man; Kim, Do-Hyun; Kim, Jong-Min; Cho, Chu-Young; Choi, Jehyuk; Kim, Kahee; Park, Jinsup; Kim, Hogyoug

2017-06-01

We demonstrated an InGaN/GaN-based, monolithic, white light-emitting diode (LED) without phosphors by using morphology-controlled active layers formed on multi-facet GaN templates containing polar and semipolar surfaces. The nanostructured surface morphology was controlled by changing the growth time, and distinct multiple photoluminescence peaks were observed at 360, 460, and 560 nm; these features were caused by InGaN/GaN-based multiple quantum wells (MQWs) on the nanostructured facets. The origin of each multi-peak was related to the different indium (In) compositions in the different planes of the quantum wells grown on the nanostructured GaN. The emitting units of MQWs in the LED structures were continuously connected, which is different from other GaN-based nanorod or nanowire LEDs. Therefore, the suggested structure had a larger active area. From the electroluminescence spectrum of the fabricated LED, monolithic white light emission with CIE color coordinates of x = 0.306 and y = 0.333 was achieved via multi-facet control combined with morphology control of the metal organic chemical vapor deposition-selective area growth of InGaN/GaN MQWs.

Magma source transition of lunar mare volcanism at 2.3 Ga

NASA Astrophysics Data System (ADS)

Kato, Shinsuke; Morota, Tomokatsu; Yamaguchi, Yasushi; Watanabe, Sei-Ichiro; Otake, Hisashi; Ohtake, Makiko

2017-09-01

Mare basalts provide insights into the composition and thermal history of the lunar mantle. The ages of mare basalts suggest a first peak of magma activity at 3.2-3.8 Ga and a second peak at 2 Ga. In this study, we reassess the correlation between the titanium contents and the eruption ages of mare basalt units using the compositional and chronological data updated by SELENE (Kaguya). Using morphological and geological criteria, we calculated the titanium content of 261 mare units across a representative area of each mare unit. In the Procellarum KREEP Terrane, where the latest eruptions are located, an increase in the mean titanium content is observed during the Eratosthenian period, as reported by previous studies. We found that the increase in the mean titanium content occurred within a relatively short period near approximately 2.3 Ga, suggesting that the magma source of the mare basalts changed at this particular age. Moreover, the high-titanium basaltic eruptions are correlated with a second peak in volcanic activity near 2 Ga. The high-titanium basaltic eruptions occurring during the last volcanic activity period can be explained by the three possible scenarios (1) the ilmenite-bearing cumulate rich layer in the core-mantle boundary formed after the mantle overturn, (2) the basaltic material layers beneath the lunar crust formed through upwelling magmas, and (3) ilmenite-bearing cumulate blocks remained in the upper mantle after the mantle overturn.

Local structure of gallate proton conductors

NASA Astrophysics Data System (ADS)

Giannici, F.; Messana, D.; Longo, A.; Sciortino, L.; Martorana, A.

2009-11-01

Lanthanum barium gallate proton conductors are based on disconnected GaO4 groups. The insertion of hydroxyls in the LaBaGaO4 network proceeds through self-doping with Ba2+, consequent O2- vacancy formation to fulfill charge neutrality. With a structural investigation on self-doped LaBaGaO4 oxides using synchrotron XRD and EXAFS on the Ga K-edge, we find that: (a) the GaO4 tetrahedra retain their size throughout the whole series; (b) the GaO4 tetrahedra rotate as rigid bodies on hydration, leading to the formation of a network of shorter O-O configurations that are stabilized by hydrogen bonds; (c) contraction of the lattice occurs along the a unit cell axis, as a consequence of an overall structural rearrangement of the hydrated solid.

Energy and Process Optimization Assessment, Fort Stewart, GA

DTIC Science & Technology

2006-04-01

ER D C/ CE R L TR -0 6 -8 Energy and Process Optimization Assessment Fort Stewart, GA John L. Vavrin, Alexander M. Zhivov, William T...distribution is unlimited. ERDC/CERL TR-06-8 April 2006 Energy and Process Optimization Assessment Fort Stewart, GA John L. Vavrin, Alexander...U.S. Army Corps of Engineers Washington, DC 20314-1000 Under Work Unit 33143 ERDC/CERL TR-06-8 ii Abstract: An Energy and Process Optimization

Work Plan for Site-Wide Assessment for Petroleum Product (Operable Unit 2), LCP Chemicals Site, Brunswick, GA

EPA Pesticide Factsheets

April 2012 assessment to delineate the extent of light non-aqueous phase liquid (LNAPL) petroleum product on the LCP Chemicals Site in Brunswick, GA. Region ID: 04 DocID: 10843426, DocDate: 04-01-2012

Activation and evaluation of GaN photocathodes

NASA Astrophysics Data System (ADS)

Qian, Yunsheng; Chang, Benkang; Qiao, Jiangliang; Zhang, Yijun; Fu, Rongguo; Qiu, Yafeng

2009-09-01

Gallium Nitride (GaN) photocathodes are potentially attractive as UV detective materials and electron sources. Based on the activation and evaluation system for GaAs photocathode, which consists of ultra-high vacuum (UHV) activation chamber, multi-information measurement system, X-ray photoelectron spectroscopy (XPS), and ultraviolet ray photoelectron spectroscopy (UPS), the control and measurement system for the activation of UV photocathodes was developed. The developed system, which consists of Xenon lamp, monochromator with scanner, signal-processing module, power control unit of Cs and O source, A/D adapter, digital I/O card, computer and software, can control the activation of GaN photocathodes and measure on-line the spectral response curves of GaN photocathodes. GaN materials on sapphire substrate were grown by Metal-Organic Chemical Vapor Deposition (MOCVD) with p-type Mg doping. The GaN materials were activated by Cs-O. The spectral response and quantum efficiency (QE) were measured and calculated. The experiment results are discussed.

Device Performance and Reliability Improvements of AlGaN/GaN/Si MOSFET Using Defect-Free Gate Recess and Laser Annealing

DTIC Science & Technology

2015-02-15

currently valid OMB control number . PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 1. REPORT DATE (DD-MM-YYYY) 20-04-2015 2. REPORT TYPE...of AlGaN/GaN/Si MOSFET Using Defect-Free Gate Recess and Laser Annealing 5a. CONTRACT NUMBER FA2386-11-1-4077 5b. GRANT NUMBER Grant AOARD...114077 5c. PROGRAM ELEMENT NUMBER 61102F 6. AUTHOR(S) Prof. Robert Wallace 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER 7

77 FR 55686 - Airworthiness Directives; GA200 (Pty) Ltd Airplanes

Federal Register 2010, 2011, 2012, 2013, 2014

2012-09-11

... United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2012... Airworthiness Directives; GA200 (Pty) Ltd Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION...

Work Plan for Comprehensive Groundwater Sampling - 2012 (Operable Unit 2), LCP Chemicals Site, Brunswick, GA

EPA Pesticide Factsheets

April 2012 plan to conduct a comprehensive sampling of groundwater from all wells in the site-wide monitoring well network, at the LCP Chemicals Site in Brunswick, GA. Region ID: 04 DocID: 10843427, DocDate: 04-01-2012

Optimal Design of Miniaturized Reflecting Metasurfaces for Ultra-Wideband and Angularly Stable Polarization Conversion.

PubMed

Borgese, Michele; Costa, Filippo; Genovesi, Simone; Monorchio, Agostino; Manara, Giuliano

2018-05-16

An ultra-wideband linear polarization converter based on a reflecting metasurface is presented. The polarizer is composed by a periodic arrangement of miniaturized metallic elements printed on a grounded dielectric substrate. In order to achieve broadband polarization converting properties, the metasurface is optimized by employing a genetic algorithm (GA) which imposes the minimization of the amplitude of the co-polar reflection coefficient over a wide frequency band. The enhanced angular stability of the polarization converter is due to the miniaturized unit cell which is obtained by imposing the maximum periodicity of the metasurface in the GA optimization process. The pixelated polarization converter obtained by the GA exhibits a relative bandwidth of 102% working from 8.12 GHz to 25.16 GHz. The analysis of the surface current distribution of the metasurface led to a methodology for refining the optimized GA solution based on the sequential removal of pixels of the unit cell on which surface currents are not excited. The relative bandwidth of the refined polarizer is extended up to 117.8% with a unit cell periodicity of 0.46 mm, corresponding to λ/20 at the maximum operating frequency. The performance of the proposed ultra-wideband polarization metasurface has been confirmed through full-wave simulations and measurements.

Sampling Design and Procedures for Fixed Surface-Water Sites in the Georgia-Florida Coastal Plain Study Unit, 1993

DTIC Science & Technology

1995-01-01

Station number Station drainage area (km2) Land resource province Land-use description Fixed-site type Altamaha River near Everett City, Ga . 02226160...Creek near Tallahassee, Fla. 02326838 27 SCP suburban indicator Little River near Ty Ty, Ga . 02317797 334 SCP agriculture (mixed row crops) indicator...Middle Prong St. Marys River near Taylor, Fla. 02229000 324 CFW silviculture indicator Tucsawhatchee Creek near Hawkinsville, Ga . 02215100 422 SCP

Conflict Management and Whole of Government: Useful Tools for U.S. National Security Strategy?

DTIC Science & Technology

2012-04-01

pp 3-16. Durkheim , Emile . Durkheim on Religion. Atlanta, GA: Ameri- can Academy of Religion. 1994. Economist Intelligence Unit, The (EIU). Democracy...15. Huntington, The Clash of Civilizations and the Remaking of World Order, p. 4. 16. Emile Durkheim , Durkheim on Religion, Atlanta, GA: American

A sodium gallophosphate with an original tunnel structure: NaGa 2(OH)(PO 4) 2

NASA Astrophysics Data System (ADS)

Guesdon, A.; Monnin, Y.; Raveau, B.

2003-05-01

A new sodium gallophosphate, NaGa 2(OH)(PO 4) 2, has been obtained by hydrothermal synthesis under autogeneous pressure at 473 K. It crystallizes in the P2 1/ n space group with the cell parameters a=8.9675(8) Å, b=8.9732(5) Å, c=9.2855(7) Å, β=114.812(6)°, V=678.2 Å 3 ( Z=4). In its original three-dimensional framework, monophosphate groups share their apices with [Ga 4O 16(OH) 2] tetrameric units, which are built from two GaO 5(OH) octahedra and two GaO 4(OH) trigonal bipyramids. The sodium cations are located in tunnels running along a, whereas the tunnels running along b are empty.

STS-121 Space Shuttle Processing Update

NASA Image and Video Library

2006-04-27

NASA Administrator Michael Griffin, left, and Associate Administrator for Space Operations William Gerstenmaier, right, look on as Space Shuttle Program Manager Wayne Hale talks from NASA's Marshall Space Flight Center about the space shuttle's ice frost ramps during a media briefing about the space shuttle program and processing for the STS-121 mission, Friday, April 28, 2006, at NASA Headquarters in Washington. Photo Credit (NASA/Bill Ingalls)

STS-121 Space Shuttle Processing Update

NASA Image and Video Library

2006-04-27

NASA Administrator Michael Griffin, left, and Associate Administrator for Space Operations William Gerstenmaier, right, look on as Space Shuttle Program Manager Wayne Hale from NASA's Marshall Space Flight Center, holds a test configuration of an ice frost ramp during a media briefing about the space shuttle program and processing for the STS-121 mission, Friday, April 28, 2006, at NASA Headquarters in Washington. Photo Credit (NASA/Bill Ingalls)

STS-121: Discovery Post Landing Press Conference

NASA Technical Reports Server (NTRS)

2006-01-01

On July 17, 2006 Dean Acosta (NASA Press Secretary), Mike Griffin (Administrator), Bill Gerstenmaier (Associate Administrator of Space Operations), and Mike Leinbach (NASA Launch Director) expressed how proud they were to be a part of the STS-121/ Discovery team. They also explained how flawlessly the mission performed and how it was the best mission ever flown. They proceeded to answer numerous questions from the press.

Comparative Biochemistry and Metabolism. Part 1. Carcinogenesis

DTIC Science & Technology

1981-10-01

qualitatively equivalent to administration of a strong alkylating agent ; this may add another consideration to Roberts’ hypothesis, but ultimately the effect...Removal, Arch. Pathol. 12:186-202. Karran, P., T. Lindahl and B. Griffin, (1979), Adaptive Responses to Alkylating Agents Involves Alterative In Situ of...the Adaptive Response to Alkylating Agents , Nature (Lond.) 280:74-76. Ruchirawat, M., (1974), Relationship Between Metabolism and Toxicity of

Incremental Validity of the Minnesota Multiphasic Personality Inventory-2 and Symptom Checklist-90-Revised with Mental Health Inpatients

ERIC Educational Resources Information Center

Simonds, Elise C.; Handel, Richard W.; Archer, Robert P.

2008-01-01

This study evaluated the incremental validity of scores from the Minnesota Multiphasic Personality Inventory-2 (MMPI-2) and the Symptom Checklist-90-Revised (SCL-90-R) in a sample of mental health inpatients originally published by Archer, Griffin, and Aiduk (1995). The incremental validity of scores from the SCL-90-R primary symptom dimensions…

A Theoretical Study of Self Assembled InAs/GaAs and InAs/GaP/GaAs Quantum Dots: Effects of Strain Balancing

NASA Astrophysics Data System (ADS)

Lin, Yih-Yin; Singh, Jasprit

2002-03-01

The past few years have been considerable efforts in growth and device application of self-assembled quantum dots. Quantum dots based on the InAs/GaAs system have been widely studied for lasers and detectors. In these structures InAs is under a large compressive strain making it difficult to have a large number stacked InAs/GaAs dots. In this paper we examine self assembled dots based on using GaAs as a substrate but using a GaAsP region to counterbalance the compressive strain in the InAs region allowing for a lower overall strain energy. We will present a comparison of the InAs/GaAs and InAs/GaAsP/GaAs self assembled dots by examining the strain energy per unit volume and the electronic spectra. The strain energy is calculated using the valence force field method and the electronic spectra is calculated using the 8 band k -- p method. The effective energy bandgap of the same size InAs dot in GaAs matrice is found 0.952 eV and is 0.928 eV in GaAs_0.8P_0.2 matrice.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Nayak, Vikas; Verma, U. P.

Quantum mechanical based first principle calculations have been employed to obtain the unit cell lattice parameters of mercury thiogallate (HgGa{sub 2}S{sub 4}) in defect stannite structure for the first time. For this, we treated HgGa{sub 2}S{sub 4} in two different types of site symmetries in the same space group. In both the cases obtained unit cell parameters are same, which shows the accuracy of present approach. The electronic band structures show the semiconducting behavior in both the cases. The density of states plot are also studied and discussed.

Epidemiologic data and trends concerning the use of regional anaesthesia for shoulder arthroscopy in the United States of America.

PubMed

Ende, David; Gabriel, Rodney A; Vlassakov, Kamen V; Dutton, Richard P; Urman, Richard D

2016-10-01

Despite a growing body of literature illustrating the benefits of regional anaesthesia in shoulder arthroscopy, data on actual use of the technique in the United States is lacking. This study analyses epidemiologic data to describe current trends in anaesthetic practice for these procedures in the United States and highlights key associations with patient and provider demographic variables that may provide further insight. We analysed the large database from the National Anesthesia Clinical Outcomes Registry of the Anesthesia Quality Institute. Of the 26,568,734 records available and after applying our exclusion criteria, we identified 169,878 shoulder arthroscopies performed from 2010 to 2014. The cases concerned all types of arthroscopic surgical procedures performed regardless of pathology (e.g. arthritis, instability, rotator cuff tears) These cases were sorted into three anaesthetic types consisting of general anaesthesia alone (GA, 62 %), general plus regional anaesthesia (GA+RA, 36 %) and RA alone (RA, 2 %). RA alone was more highly associated with board-certified anaesthesiologists practicing at university hospitals, older patients, patients with higher American Society of Anesthesiologists (ASA) classification and shorter procedures. RA is rarely used as the primary anaesthetic for these procedures across the country, while there is a steadily growing rate of GA+RA combination anaesthetics. Numerous advantages have been reported for utilizing RA and avoiding GA. The low rate at which RA is used as the sole anesthetic may represent room for improvement nationwide. GA+RA combination technique quickly became the predominant anaesthetic choice for shoulder arthroscopy during the five years of this analysis. III.

The 3.26-3.24 Ga Barberton asteroid impact cluster: Tests of tectonic and magmatic consequences, Pilbara Craton, Western Australia

NASA Astrophysics Data System (ADS)

Glikson, Andrew; Vickers, John

2006-01-01

The location in the Barberton Greenstone Belt (Kaapvaal Craton) of ∼3.26-3.24 Ga asteroid impact ejecta units at, and immediately above, a sharp break between a > 12 km-thick mafic-ultramafic volcanic crust (Onverwacht Group ∼3.55-3.26 Ga, including the ∼3.298 > 3.258 Ga Mendon Formation) and a turbidite-felsic volcanic rift-facies association (Fig Tree Group ∼3.258-3.225 Ga), potentially represents the first documented example of cause-effect relations between extraterrestrial bombardment and major tectonic and igneous events [D.R. Lowe, G.R. Byerly, F. Asaro, F.T. Kyte, Geological and geochemical record of 3400 Ma old terrestrial meteorite impacts, Science 245 (1989) 959-962; D.R. Lowe, G.R. Byerly, F.T. Kyte, A. Shukolyukov, F. Asaro, A. Krull, Spherule beds 3.47-3.34 Ga-old in the Barberton greenstone belt, South Africa: a record of large meteorite impacts and their influence on early crustal and biological evolution, Astrobiology 3 (2003) 7-48; A.Y. Glikson, The astronomical connection of terrestrial evolution: crustal effects of post-3.8 Ga mega-impact clusters and evidence for major 3.2 ± 0.1 Ga bombardment of the Earth-Moon system, J. Geodyn. 32 (2001) 205-229]. Here we correlate this boundary with a contemporaneous break and peak magmatic and faulting events in the Pilbara Craton, represented by the truncation of a 3.255-3.235 Ga-old volcanic sequence (Sulphur Springs Group-SSG) by a turbidite-banded iron formation-felsic volcanic association (Pincunah Hill Formation, basal Gorge Creek Group). These events are accompanied by ∼3.252-3.235 Ga granitoids (Cleland plutonic suite). The top of the komatiite-tholeiite-rhyolite sequence of the SSG is associated with a marker chert defined at 3.238 ± 3-3.235 ± 3 Ga, abruptly overlain by an olistostrome consisting of mega-clasts of felsic volcanics, chert and siltstone up to 250 × 150 m-large, intercalated with siliciclastic sedimentary rocks and felsic volcanics (Pincunah Hill Formation-basal Gorge Creek Group-GCG [R. M. Hill, Stratigraphy, structure and alteration of hanging wall sedimentary rocks at the Sulphur Springs volcanogenic massive sulphide (VMS) prospect, east Pilbara Craton, Western Australia. B.Sc Hon. Thesis, University of Western Australia (1997) 67 pp.; M.J. Van Kranendonk, A.H. Hickman, R.H. Smithies, D.R. Nelson, Geology and tectonic evolution of the Archaean north Pilbara terrain, Pilbara Craton, Western Australia, Econ. Geol. 97 (2002) 695-732; M.J. Van Kranendonk, Geology of the North Shaw 1 : 100 000 Sheet. Geological Survey Western Australia 1 : 100 000 Geological Series (2000) 86 pp., R. Buick, C.A.W. Brauhart, P. Morant, J.R. Thornett, J.G. Maniew, J.G. Archibald, M.G. Doepel, I.R. Fletcher, A.L. Pickard, J.B. Smith, M.B. Barley, N.J. McNaughton, D.I. Groves, Geochronology and stratigraphic relations of the Sulphur Springs Group and Strelley Granite: a temporally distinct igneous province in the Archaean Pilbara Craton, Australia, Precambrian Res. 114 (2002) 87-120]). The structure and scale of the olistostrome, not seen elsewhere in the Pilbara Craton, is interpreted in terms of intense faulting and rifting, supported by topographic relief represented by deep incision of overlying arenites (Corboy Formation) into underlying units [M.J. Van Kranendonk, Geology of the North Shaw 1 : 100 000 Sheet. Geological Survey Western Australia 1 : 100 000 Geological Series (2000) 86 pp.]. The age overlaps between (1) 3.255 ± 4-3.235 ± 3 Ga peak igneous activity represented by the SSG and the Cleland plutonic suite (Pilbara Craton) and the 3.258 ± 3 Ga S2 Barberton impact unit, and (2) 3.235 ± 3 Ga top SSG break and associated faulting and the 3.243 ± 4 S3-S4 Barberton impact units may not be accidental. Should correlations between the Barberton S2-S4 impact units and magmatic and tectonic events in the Pilbara Craton be confirmed, they would imply impact-triggered reactivation of mantle convection, crustal anatexis, faulting and strong vertical movements in Archaean granite-greenstone terrains associated with large asteroid impacts, culminating in transformation from sima-dominated crust to continental rift environments.

The Military & Political Succession in China: Leadership, Institutions, Beliefs

DTIC Science & Technology

1992-01-01

Xinjiang MD Political Commissar Tang Guangcai is most likely a veteran of the Fifth FA system who has served in Xinjiang since at least 1979. He was a...28th GA (Shanxi Province) Tang Liehui Commander Guo Weixin Political Commissar 38th GA (Hebei Province) Zhang Meiyuan WuRunzhong 63rd GA...po1itical department director of the same unit in June 1989. Both men served with Martial Law Forces during the Tiananmen crisis. Commander Tang Liehui of

Magnetic properties of the layered III-VI diluted magnetic semiconductor Ga{sub 1−x}Fe{sub x}Te

DOE Office of Scientific and Technical Information (OSTI.GOV)

Pekarek, T. M.; Edwards, P. S.; Olejniczak, T. L.

2016-05-15

Magnetic properties of single crystalline Ga{sub 1−x}Fe{sub x}Te (x = 0.05) have been measured. GaTe and related layered III-VI semiconductors exhibit a rich collection of important properties for THz generation and detection. The magnetization versus field for an x = 0.05 sample deviates from the linear response seen previously in Ga{sub 1−x}Mn{sub x}Se and Ga{sub 1−x}Mn{sub x}S and reaches a maximum of 0.68 emu/g at 2 K in 7 T. The magnetization of Ga{sub 1−x}Fe{sub x}Te saturates rapidly even at room temperature where the magnetization reaches 50% of saturation in a field of only 0.2 T. In 0.1 T atmore » temperatures between 50 and 400 K, the magnetization drops to a roughly constant 0.22 emu/g. In 0 T, the magnetization drops to zero with no hysteresis present. The data is consistent with Van-Vleck paramagnetism combined with a pronounced crystalline anisotropy, which is similar to that observed for Ga{sub 1−x}Fe{sub x}Se. Neither the broad thermal hysteresis observed from 100-300 K in In{sub 1−x}Mn{sub x}Se nor the spin-glass behavior observed around 10.9 K in Ga{sub 1−x}Mn{sub x}S are observed in Ga{sub 1−x}Fe{sub x}Te. Single crystal x-ray diffraction data yield a rhombohedral space group bearing hexagonal axes, namely R3c. The unit cell dimensions were a = 5.01 Å, b = 5.01 Å, and c = 17.02 Å, with α = 90°, β = 90°, and γ = 120° giving a unit cell volume of 369 Å{sup 3}.« less

Clinical Applications of Gallium-68

PubMed Central

Banerjee, Sangeeta Ray; Pomper, Martin G.

2013-01-01

Gallium-68 is a positron-emitting radioisotope that is produced from a 68Ge/68Ga generator. As such it is conveniently used, decoupling radiopharmacies from the need for a cyclotron on site. Gallium-68-labeled peptides have been recognized as a new class of radiopharmaceuticals showing fast target localization and blood clearance. 68Ga-DOTATOC, 8Ga-DOTATATE, 68Ga-DOTANOC, are the most prominent radiopharmaceuticals currently in use for imaging and differentiating lesions of various somatostatin receptor subtypes, overexpressed in many neuroendocrine tumors. There has been a tremendous increase in the number of clinical studies with 68Ga over the past few years around the world, including within the United States. An estimated ~10,000 scans are being performed yearly in Europe at about 100 centers utilizing 68Ga-labeled somatostatin analogs within clinical trials. Two academic sites within the US have also begun to undertake human studies. This review will focus on the clinical experience of selected, well-established and recently applied 68Ga-labeled imaging agents used in nuclear medicine. PMID:23522791

Anisotropic expansion and amorphization of Ga2O3 irradiated with 946 MeV Au ions

NASA Astrophysics Data System (ADS)

Tracy, Cameron L.; Lang, Maik; Severin, Daniel; Bender, Markus; Trautmann, Christina; Ewing, Rodney C.

2016-05-01

The structural response of β-Ga2O3 to irradiation-induced electronic excitation was investigated. A polycrystalline pellet of this material was irradiated with 946 MeV Au ions and the resulting structural modifications were characterized using in situ X-ray diffraction analysis at various ion fluences, up to 1 × 1013 cm-2. Amorphization was induced, with the accumulation of the amorphous phase following a single-impact mechanism in which each ion produces an amorphous ion track along its path. Concurrent with this phase transformation, an increase in the unit cell volume of the material was observed and quantified using Rietveld refinement. This unit cell expansion increased as a function of ion fluence before saturating at 1.8%. This effect is attributed to the generation of defects in an ion track shell region surrounding the amorphous track cores. The unit cell parameter increase was highly anisotropic, with no observed expansion in the [0 1 0] direction. This may be due to the structure of β-Ga2O3, which exhibits empty channels of connected interstitial sites oriented in this direction.

Coexistence of enriched and modern-like 142Nd signatures in Archean igneous rocks of the eastern Kaapvaal Craton, southern Africa

NASA Astrophysics Data System (ADS)

Schneider, Kathrin P.; Hoffmann, J. Elis; Boyet, Maud; Münker, Carsten; Kröner, Alfred

2018-04-01

The short-lived 146Sm-142Nd isotope system is an important tool for tracing Hadean crust-mantle differentiation processes and constraining their imprint on much younger rocks from Archean cratons. We report the first comprehensive set of high-precision 142Nd analyses for granitoids and amphibolites of the Ancient Gneiss Complex (AGC; Swaziland) and the oldest metavolcanic units of the Barberton Greenstone Belt (BGB; South Africa). The investigated samples span an age range from 3.66 Ga to 3.22 Ga and are representative of major geological units of the AGC and the lower Onverwacht Group of the BGB. Measured samples yielded μ142Nd values in the range from -8 ppm to +3 ppm relative to the JNdi-1 terrestrial standard, with typical errors smaller than 4.4 ppm. The distribution of the μ142Nd values for these 17 measured samples is bimodal with ten samples showing a tendency towards slightly negative μ142Nd anomalies, whereas seven samples have 142Nd similar to the terrestrial reference. The only confidently resolvable μ142Nd anomalies were found in a 3.44 Ga Ngwane Gneiss sample and in amphibolites of the ca. 3.45 Ga Dwalile Greenstone Remnant, revealing μ142Nd values ranging from - 7.9 ± 4.4 to - 6.1 ± 4.3 ppm. The μ142Nd deficits do not correlate with age, lithological unit, or sample locality. Instead, our results reveal that two distinct mantle domains were involved in the formation of the AGC crust. The two reservoirs can be distinguished by their μ142Nd signatures. Mantle-derived rocks tapped the enriched reservoir with negative μ142Nd at least until 3.46 Ga, whereas the granitoids preserved a negative μ142Nd signature that formed by incorporation of older AGC crust at least until 3.22 Ga. The oldest gneisses with no μ142Nd anomaly are up to 3.64 Ga in age, indicating that a modern terrestrial 142Nd reservoir was already present by early Archean times.

The Proterozoic of NW Mexico revisited: U-Pb geochronology and Hf isotopes of Sonoran rocks and their tectonic implications

NASA Astrophysics Data System (ADS)

Solari, L. A.; González-León, C. M.; Ortega-Obregón, C.; Valencia-Moreno, M.; Rascón-Heimpel, M. A.

2018-04-01

Several Proterozoic basement units crop out in the Sonora State of NW Mexico, and the same can be correlated with crustal provinces of southern Laurentia in the neighboring southwestern USA. Zircon U-Pb and Hf isotopic determinations in more than 300 grains separated from igneous and metaigneous rocks from these units indicate that the crystalline basement in Sonora is made up of different components, which are from west to east: (1) The Caborca-Mojave province to the west, characterized by the so-called Bámori Complex, have U-Pb ages between 1696 and 1772 Ma, with moderately juvenile to slightly evolved ɛHf values, yielding T DM ages of ca. 2.1-2.4 Ga; (2) in the intermediate area, east of Hermosillo, the Palofierral and La Ramada orthogneiss units yield an age of 1640 and 1703 Ma, respectively, both having juvenile ɛHf with the Palofierral overlapping the depleted mantle curve at ca. 1.65 Ga; and (3) in the northeastern Sonora, samples from the southern extension of the Mazatzal province, represented by the Pinal Schist, yielded ages between 1674 and 1694 Ma, with moderately juvenile to juvenile ɛHf values and a T DM age of ca. 1.9 Ga. In addition, a suite of post-tectonic granites was also studied in Caborca (San Luis granite) as well as in northeastern Sonora (Cananea granite), both yielding ages of ca. 1.44 Ga with moderately juvenile ɛHf values ranging from -1 to +8 and T DM dates of ca. 1.8-1.9 Ga and 1.6-1.7 Ga, respectively. These two isotopically contrasting provinces may imply the existence of a Proterozoic paleo-suture. However, if the Palofierral gneiss, of which the Hf signature straddles the depleted mantle array, is taken as the source for the 1.44 Ga Cananea granite, then the location of such a suture zone should lay farther south than the proposed trace of the Mojave-Sonora megashear.

Proceedings of the Annual Meeting of the Association for Education in Journalism and Mass Communication (76th, Kansas City, Missouri, August 11-14, 1993). Part XIV: More Miscellaneous Studies.

ERIC Educational Resources Information Center

Association for Education in Journalism and Mass Communication.

These proceedings contain the following seven papers: "An Examination of Community Pluralism, News Framing, Source Use and Conflict of an Environmental Issue" (Cynthia-Lou Coleman and others); "The Effectiveness of 'How' Graphics and Text in Conveying Basic News Story Information" (Jeffrey L. Griffin and Robert L. Stevenson);…

Proceedings of the Annual Meeting of the Association for Education in Journalism and Mass Communication (76th, Kansas City, Missouri, August 11-14, l993). Part X: Health, Science, and the Environment.

ERIC Educational Resources Information Center

Association for Education in Journalism and Mass Communication.

The Health, Science, and the Environment section of this collection of conference presentations contains the following 10 papers: "Telling Stories about Superfund Sites" (Sharon Dunwoody and Robert J. Griffin); "Understanding Audience Reactions to AIDS Messages: An Adaptation of the Meaning-Based Model" (Sujatha Sosale);…

Scientific coats of arms.

PubMed

Fara, Patricia

2005-09-01

With their mythical creatures and arcane symbolism, coats of arms seem to have little connection with modern science. Yet despite its chivalric origins, the ancient language of heraldry has long fascinated famous scientists. Although this idiosyncratic tradition was parodied by Victorian geologists, who laughingly replaced unicorns and griffins with images of dinosaurs that they had recently discovered, it has been perpetuated since by Ernest Rutherford, who liked to present himself as a new alchemist.

House Hearing Nunn-McCurdy Review of NPOESS

NASA Image and Video Library

2006-06-07

NASA Administrator Michael Griffin, left, testifies before the House Committee on Science and Technology regarding the future of the National Polar-orbiting Operational Environmental Satellite System (NPOESS) and results of the Nunn-McCurdy review of NOAA’s weather satellite program, as Under Secretary of the Air Force Dr. Ronald Sega looks on, Thursday, June 8, 2006, at the Rayburn House Office Building in Washington. Photo Credit: (NASA/Bill Ingalls)

Constellation Program Press Conference

NASA Image and Video Library

2006-06-04

NASA Administrator Michael Griffin, seated left, Scott Horowitz, NASA Associate Administrator for Exploration Systems and Jeff Hanley, Constellation Program Manager, right, are seen during a press conference outlining specific center responsibilities associated with the Constellation Program for robotic and human moon and Mars exploration, Monday, June 5, 2006, at NASA Headquarters in Washington. Dean Acosta, NASA Deputy Assistant Administrator and Press Secretary, far left, moderates the program. Photo Credit (NASA/Bill Ingalls)

Proceedings of the Annual Meeting of the Association for Education in Journalism and Mass Communication (83rd, Phoenix, Arizona, August 9-12, 2000). Science Communication Interest Group.

ERIC Educational Resources Information Center

Association for Education in Journalism and Mass Communication.

The Science Communication Interest Group section of the proceedings contains the following five papers: "Accounting for the Complexity of Causal Explanations in the Wake of an Environmental Risk" (LeeAnn Kahlor, Sharon Dunwoody and Robert J. Griffin); "Construction of Technology Crisis and Safety: News Media's Framing the Y2K…

Atmospheric O2, CO2 and delta13C measurements from aircraft sampling over Griffin Forest, Perthshire, UK.

PubMed

Sturm, Patrick; Leuenberger, Markus; Moncrieff, John; Ramonet, Michel

2005-01-01

Regular vertical aircraft sampling has been performed in the lower troposphere above Griffin Forest, near Aberfeldy, Perthshire, UK (56 degrees 37'N, 3 degrees 47'W), between February 2003 and May 2004, for analysis of O2/N2, CO2 and delta13C of CO2. We sampled flasks between 800 and 3100 m above sea level. The peak-to-peak amplitude of the seasonal cycle of O2/N2 decreases from 171 per meg at 800 m to 113 per meg at 3100 m. Furthermore, the seasonal cycle is shifted from low to high altitudes with a lag of about 1 month. The same features are observed for CO2 with a decrease in the peak-to-peak amplitude of the seasonal cycle from 17.6 ppm at 800 m to 11.4 ppm at 3100 m. The vertical profiles show decreasing O2/N2 ratios in summer and increasing O2/N2 ratios in wintertime with increasing sampling height, due to surface exchange of oxygen with the land biosphere and the ocean. The O2:CO2 exchange ratios of the vertical profiles vary between -1.5 and -2.4 mol O2/mol CO2. Copyright (c) 2005 John Wiley & Sons, Ltd.

A genetic algorithm solution to the unit commitment problem

DOE Office of Scientific and Technical Information (OSTI.GOV)

Kazarlis, S.A.; Bakirtzis, A.G.; Petridis, V.

1996-02-01

This paper presents a Genetic Algorithm (GA) solution to the Unit Commitment problem. GAs are general purpose optimization techniques based on principles inspired from the biological evolution using metaphors of mechanisms such as natural selection, genetic recombination and survival of the fittest. A simple Ga algorithm implementation using the standard crossover and mutation operators could locate near optimal solutions but in most cases failed to converge to the optimal solution. However, using the Varying Quality Function technique and adding problem specific operators, satisfactory solutions to the Unit Commitment problem were obtained. Test results for systems of up to 100 unitsmore » and comparisons with results obtained using Lagrangian Relaxation and Dynamic Programming are also reported.« less

Detrital zircon geochronology of quartzose metasedimentary rocks from parautochthonous North America, east-central Alaska

USGS Publications Warehouse

Dusel-Bacon, Cynthia; Holm-Denoma, Christopher S.; Jones, James V.; Aleinikoff, John N.; Mortensen, James K.

2017-01-01

We report eight new U-Pb detrital zircon ages for quartzose metasedimentary rocks from four lithotectonic units of parautochthonous North America in east-central Alaska: the Healy schist, Keevy Peak Formation, and Sheep Creek Member of the Totatlanika Schist in the northern Alaska Range, and the Butte assemblage in the northwestern Yukon-Tanana Upland. Excepting 1 of 3 samples from the Healy schist, all have dominant detrital zircon populations of 1.9–1.8 Ga and a subordinate population of 2.7–2.6 Ga. Three zircons from Totatlanika Schist yield the youngest age of ca. 780 Ma. The anomalous Healy schist sample has abundant 1.6–0.9 Ga detrital zircon, as well as populations at 2.0–1.8 Ga and 2.7–2.5 Ga that overlap the ages from the rest of our samples; it has a minimum age population of ca. 1007 Ma.Detrital zircon age populations from all but the anomalous sample are statistically similar to those from (1) other peri-Laurentian units in east-central Alaska; (2) the Snowcap assemblage in Yukon, basement of the allochthonous Yukon-Tanana terrane; (3) Neoproterozoic to Ordovician Laurentian passive margin strata in southern British Columbia, Canada; and (4) Proterozoic Laurentian Sequence C strata of northwestern Canada. Recycling of zircon from the Paleoproterozoic Great Bear magmatic zone in the Wopmay orogen and its Archean precursors could explain both the Precambrian zircon populations and arc trace element signatures of our samples. Zircon from the anomalous Healy schist sample resembles that in Nation River Formation and Adams Argillite in eastern Alaska, suggesting recycling of detritus in those units.

Atomic Scale Picture of the Ion Conduction Mechanism in Tetrahedral Network of Lanthanum Barium Gallate

DOE Office of Scientific and Technical Information (OSTI.GOV)

Jalarvo, Niina H; Gourdon, Olivier; Bi, Zhonghe

2013-01-01

Combined experimental study of impedance spectroscopy, neutron powder diffraction and quasielastic neutron scattering was performed to shed light into the atomic scale ion migration processes in proton and oxide ion conductor; La0.8Ba1.2GaO3.9 . This material consist of tetrahedral GaO4 units, which are rather flexible and rocking motion of these units promotes the ionic migration process. The oxide ion (vacancy) conduction takes place on channels along c axis, involving a single elementary step, which occurs between adjacent tetrahedron (inter-tetrahedron jump). The proton conduction mechanism consists of intra-tetrahedron and inter-tetrahedron elementary processes. The intra-tetrahedron proton transport is the rate-limiting process, with activationmore » energy of 0.44 eV. The rocking motion of the GaO4 tetrahedron aids the inter-tetrahedral proton transport, which has the activation energy of 0.068 eV.« less

Fabrication and characterization of AlN metal-insulator-semiconductor grown Si substrate

NASA Astrophysics Data System (ADS)

Mahyuddin, A.; Azrina, A.; Mohd Yusoff, M. Z.; Hassan, Z.

2017-11-01

An experimental investigation was conducted to explore the effect of inserting a single AlGaN interlayer between AlN epilayer and GaN/AlN heterostructures on Si (111) grown by molecular beam epitaxy (MBE). It is confirmed from the scanning electron microscopy (SEM) that the AlGaN interlayer has a remarkable effect on reducing the tensile stress and dislocation density in AlN top layer. Capacitance-voltage (C-V) measurements were conducted to study the electrical properties of AlN/GaN heterostructures. While deriving the findings through the calculation it is suggested that the AlGaN interlayer can significantly reduce the value of effective oxide charge density and total effective number of charges per unit area which are 1.37 × 10-6C/cm2 and 8.55 × 1012cm-2, respectively.

Screening for retinopathy of prematurity in China: a neonatal units-based prospective study.

PubMed

Xu, Yu; Zhou, Xiaohong; Zhang, Qi; Ji, Xunda; Zhang, Qin; Zhu, Jianxing; Chen, Chao; Zhao, Peiquan

2013-12-19

To analyze the incidence and severity of retinopathy of prematurity (ROP) in China, and to explore the workload implications of applying different criteria. A prospective, neonatal units-based study undertaken in two tertiary level hospitals in Shanghai, China, from January 1, 2010 to December 31, 2012. All infants with birth weight (BW) of 2000 g or less and/or gestational age (GA) of 34 weeks or less were screened for ROP. Retinopathy of prematurity was classified using the international classification, and was treated in accordance with the recommendations of the Early Treatment for Retinopathy of Prematurity Cooperative Group. A total of 2825 (93.7%) of 3014 eligible infants were screened, and ROP was diagnosed in 503 infants (17.8%). One hundred ninety-one infants (6.8%) had type 1 or worse ROP and were treated with laser or vitrectomy. The mean GA of ROP patients was 29.9 ± 2.1 weeks and their mean BW was 1425 ± 266 g. Infants who needed treatment for ROP had a mean GA of 29.3 ± 2.1 weeks and mean BW of 1331 ± 330 g. Among these treated infants, 18 infants (9.4%) exceeded the United Kingdom's (UK) screening criteria, and 28 (14.7%) exceeded the criteria used in the United States (US). If narrower criteria, as in GA less than or equal to 33 weeks and/or BW less than or equal to 1750 g were adopted, almost 16.9% fewer infants would not have been examined, with no infant missing treatment. Larger, older infants are at risk in China and screening criteria used in the US and UK may not be suitable for China. Further population-based studies are recommended to determine the necessity of modifying the current ROP screening protocol.

Structural, magnetic and Mossbauer studies of TI doped Gd2Fe17-xTix and Gd2Fe16Ga1-xTix (0≤x≤1)

NASA Astrophysics Data System (ADS)

Pokharel, G.; Syed Ali, K. S.; Mishra, S. R.

2015-05-01

Magnetic compounds of the type Gd2Fe17-xTix and Gd2Fe16Ga1-xTix (x=0.0-1.0) were prepared by arc melting and their structural and magnetic properties were studied by X-ray diffraction (XRD), magnetometery and Mossbauer spectroscopy. The Rietveld analysis of X-ray data shows that these α-Fe free solid-solutions crystallize with Th2Ni17-type structure as main phase along with GdFe2 and TiFe2 as additional phases at higher, x≥0.5 contents. The unit cell volume expands with Ga and Ti content. The Rietveld analysis indicate that both Ti and Ga atoms prefer 12j and 12k sites in both compounds. The effect of Ti and co-substituted Ga-Ti on the bond length are quite different. The saturation magnetization Ms, at 300 K for Gd2Fe17-xTix and Gd2Fe16Ga1-xTix was found to decrease linearly with increasing Ti content. The Ms in both compounds at x=1 reduced by 9% as compared to their parent compounds at x=0. The Curie temperature, Tc, for Gd2Fe17-xTix increased from 513 K (x=0) to 544 K (x=1) while Tc for Gd2Fe16Ga1-xTix reduced from 560 (x=0) to 544 K (x=1) with increase in Ti content. Thus the observed variation in Tc follows Gd2Fe17

Precambrrian crustal evolution in the great falls tectonic zone

NASA Astrophysics Data System (ADS)

Gifford, Jennifer N.

The Great Falls Tectonic Zone (GFTZ) is a zone of northeast trending geological structures in central Montana that parallel structures in the underlying basement. U-Pb zircon and Nd isotopic data from the Little Belt Mountains (LBM) suggest that the GFTZ formed at ~1.86 to 1.80 Ga due to ocean subduction followed by collision between the Archean Wyoming Province (WP) and Medicine Hat Block (MHB). This study characterizes the GFTZ basement by geochronological and geochemical analysis of crustal xenoliths collected from Montana Alkali Province volcanics and exposed basement rock in the Little Rocky Mountains (LRM). Xenoliths collected from the Grassrange and Missouri Breaks diatremes and volcanics in the Bearpaw and Highwood Mountains have igneous crystallization ages from ~1.7 Ga to 1.9 Ga and 2.4 Ga to 2.7 Ga, and metamorphic ages from ~1.65 Ga to 1.84 Ga. Zircon Lu-Hf and whole-rock Sm-Nd data indicate that the xenoliths originated from reworked older continental crust mixed with mantle-derived components in all cases. Trace element patterns show fluid mobile element enrichments and fluid immobile element depletions suggestive of a subduction origin. Igneous ages in the LRM range older, from ~2.4 Ga to 3.2 Ga. Geochemical evidence suggests that the LRM meta-igneous units also formed in a subduction setting. Detrital zircon ages span the early Paleoproterozoic to Mesoarchean, with abundant 2.8 Ga ages. Zircon U-Pb igneous crystallization age data from xenoliths and the LRM are consistent with U-Pb zircon igneous crystallization ages from the MHB, suggesting that this segment of the GFTZ shares an affinity with concealed MHB crust. Published detrital zircon ages from the northern Wyoming Province reveal more abundant >3.0 Ga ages than the MHB or GFTZ samples. These geochronologic and geochemical data from the xenoliths and LRM samples allow for a refined model for crustal evolution in the GFTZ. Subduction under the Neoarchean to Paleoproterozoic crust of the MHB formed an igneous arc followed by metamorphism during the MHB-WP collision. Later Paleoproterozoic tectonothermal activity represents post-orogenic collapse after the terminal collision. Tectonic activity in the Cenozoic led to basement uplift and the formation of xenolith bearing volcanic units sampled for this study.

USDA Memorandum of Understanding Signing

NASA Image and Video Library

2008-07-22

U.S. Senator Kay Bailey Hutchison, R-Texas looks on as Secretary of Agriculture Ed Schafer, left, shakes hands with NASA Administrator Michael Griffin after signing a memorandum of understanding (MOU) between NASA and USDA Wednesday, July 23, 2008, at the Russell Senate Office Building in Washington. The MOU will enable the USDA's Agricultural Research Service (ARS) to conduct plant and animal related research on the International Space Station (ISS). Photo Credit: (NASA/Bill Ingalls)

Symbolic and Interactional Perspectives on Leadership: An Integrative Framework.

DTIC Science & Technology

1985-05-01

RD-RI55 24? SYMBOLIC AND INTERACTIONAL PERSPECTIVES ON LEADERSHIP: 1/1 AN INTEGRATIVE FRA..(U) TEXAS A AND M UNIV COLLEGE STATION DEPT OF MANAGEMENT...Processing Systems Office of Naval Research Technical Report Series Symbolic and Interactional 11% Perspectives on Leadership: An Integrative Framework...Richard Daft -~ and Ricky Griffin CAs * Principal Investigators IThi. dmmu asbom apro 1W ~ ~ 1W ~ w 4 d a% f dkbsa Symbolic and Interactional Perspectives

29 CFR 776.16 - Employment in “producing, * * * or in any other manner working on” goods.

Code of Federal Regulations, 2014 CFR

2014-07-01

.... Friend, 156 F. 2d 429 (C.A. 8); Walling v. Commet Carriers, 151 F. 2d 107 (C.A. 2); Phillips v. Star Overall Dry Cleaning Laundry Co., 149 F. 2d 416 (C.A. 2); certiorari denied 327 U.S. 780; Walling v. Griffin Cartage Co., 62 F. Supp. 396, affirmed in 153 F. 2d 587 (C.A. 6). For examples, see paragraphs (c...

29 CFR 776.16 - Employment in “producing, * * * or in any other manner working on” goods.

Code of Federal Regulations, 2013 CFR

2013-07-01

.... Friend, 156 F. 2d 429 (C.A. 8); Walling v. Commet Carriers, 151 F. 2d 107 (C.A. 2); Phillips v. Star Overall Dry Cleaning Laundry Co., 149 F. 2d 416 (C.A. 2); certiorari denied 327 U.S. 780; Walling v. Griffin Cartage Co., 62 F. Supp. 396, affirmed in 153 F. 2d 587 (C.A. 6). For examples, see paragraphs (c...

29 CFR 776.16 - Employment in “producing, * * * or in any other manner working on” goods.

Code of Federal Regulations, 2012 CFR

2012-07-01

.... Friend, 156 F. 2d 429 (C.A. 8); Walling v. Commet Carriers, 151 F. 2d 107 (C.A. 2); Phillips v. Star Overall Dry Cleaning Laundry Co., 149 F. 2d 416 (C.A. 2); certiorari denied 327 U.S. 780; Walling v. Griffin Cartage Co., 62 F. Supp. 396, affirmed in 153 F. 2d 587 (C.A. 6). For examples, see paragraphs (c...

House Hearing Nunn-McCurdy Review of NPOESS

NASA Image and Video Library

2006-06-08

Under Secretary of the Air Force Dr. Ronald Sega, right, testifies before the House Committee on Science and Technology regarding the future of the National Polar-orbiting Operational Environmental Satellite System (NPOESS) and results of the Nunn-McCurdy review of NOAA’s weather satellite program as NASA Administrator Michael Griffin, left, looks at a television monitor, Thursday, June 8, 2006, at the Rayburn House Office Building in Washington. Photo Credit: (NASA/Bill Ingalls)

House Hearing Nunn-McCurdy Review of NPOESS

NASA Image and Video Library

2006-06-07

Chairman of the House Committee on Science and Technology U.S. Rep. Sherwood Boehlert, R-N.Y., left, shakes hands with NASA Administrator Michael Griffin prior to a hearing on the future of the National Polar-orbiting Operational Environmental Satellite System (NPOESS) and results of the Nunn-McCurdy review of NOAA’s weather satellite program, Thursday, June 8, 2006, at the Rayburn House Office Building in Washington. Photo Credit: (NASA/Bill Ingalls)

Fiscal Year 2007 Budget Press Conference

NASA Image and Video Library

2006-02-06

NASA Associate Administrator for Aeronautics Research Lisa J. Porter answers reporters questions during the fiscal year 2007 news conference, Monday, Feb. 6, 2006, at NASA Headquarters in Washington. NASA Administrator Michael Griffin was joined by the heads of NASA's four mission directorates to explain how the proposed $16.8 billion dollar budget supports the Vision for Space Exploration. The budget represents a 3.2% increase above the fiscal year 2006 appropriated budget. Photo Credit: (NASA/Bill Ingalls)

Fiscal Year 2007 Budget Press Conference

NASA Image and Video Library

2006-02-06

NASA Administrator Michael Griffin, seated center, outlines the President's budget for fiscal year 2007 during a news conference, Monday, Feb. 6, 2006, at NASA Headquarters in Washington. The administrator was joined by the heads of NASA's four mission directorates to explain how the proposed $16.8 billion dollar budget supports the Vision for Space Exploration. The budget represents a 3.2% increase above the Fiscal Year 2006 appropriated budget. Photo Credit: (NASA/Bill Ingalls)

Ten Years Later: A Study of the Experiences of Non-Traditional Women Students Who Succeeded in A Community College Setting with the Help of A Mentor Program

ERIC Educational Resources Information Center

Bradford, Gyndolyn

2017-01-01

The idea of mentoring in higher education is considered a good thing for students and faculty. What is missing in the research is how does mentoring influence and shape the student experience, does mentoring help retention, and how does it contribute to student development? (Crisp, Baker, Griffin, Lunsford, Pifer, 2017). The mentoring relationship…

Water Resources Investigation. Cape Girardeau - Jackson Metropolitan Area, Missouri. Volume 2. Appendices.

DTIC Science & Technology

1983-12-01

tests were conducted for the Maline Creek urban study recently completed by the St. Louis District. Those tests showed that variations in the...were not performed .or expansion and contraction coefficients used in this study. However, such tests were conducted for the Maline Creek urban study...Conservation, letter to Mr. Jack Rasmussen, Chief of Planning Branch, St. -Louis District, Reference to Maline Creek Study, dated 18 June 1979. Griffin, C

Characteristics in mineral compositions of lunar latest mare volcanism revealed from spectral data

NASA Astrophysics Data System (ADS)

Kato, S.; Morota, T.; Yamaguchi, Y.; Watanabe, S.; Otake, H.; Ohtake, M.; Nimura, T.

2016-12-01

Lunar mare basalts provide insights into the composition and thermal history of the lunar mantle. According to crater counting analysis with remote sensing data, the ages of mare basalts suggest a first peak of magma activity at 3.2-3.8 Ga and a second peak at 2 Ga. In order to understand the mechanism for causing the second peak and its magma source, we reassess the correlation between the titanium contents and the eruption ages of mare basalt units using the compositional and chronological data updated by SELENE (Kaguya). In the Procellarum KREEP Terrane, where the latest mare basalt units are concentrated, an increase in the mean titanium content is observed in the Eratosthenian Period, as reported by previous studies. We found that, however, a rapid increase in mean titanium content occurred near 2.3 Ga. This result suggests that the magma source of the mare basalts changed at this particular age. Moreover, the high-titanium basaltic eruptions are correlated with the second peak in mare volcanism at 2 Ga. The latest mare volcanism may have been induced by a super-hot plume originating from the core-mantle boundary. In this study, to reveal the difference between the volcanic activities before and after 2.3 Ga, we developed the method to estimate the mineral components and elemental compositions of lunar mare basalts by using the Kaguya Spectral Profiler data. We will introduce the detail of the method and discuss about the difference between the mineral compositions of mare basalts before and after 2.3 Ga based on our preliminary results.

Georgia Computes! An Intervention in a US State, with Formal and Informal Education in a Policy Context

ERIC Educational Resources Information Center

Guzdial, Mark; Ericson, Barbara; Mcklin, Tom; Engelman, Shelly

2014-01-01

Georgia Computes! ("GaComputes") was a six-year (2006-2012) project to improve computing education across the state of Georgia in the United States, funded by the National Science Foundation. The goal of GaComputes was to broaden participation in computing and especially to engage more members of underrepresented groups which includes…

Reticulitermes nelsonae, a New Species of Subterranean Termite (Rhinotermitidae) from the Southeastern United States

PubMed Central

Lim, Su Yee; Forschler, Brian T.

2012-01-01

Reticulitermes nelsonae, a new species of Rhinotermitidae (Isoptera) is described based on specimens from Sapelo Island, GA, Thomasville, GA, Havelock, NC, and Branford, FL. Adult (alate) and soldier forms are described. Diagnostic characters are provided and incorporated into a supplemental couplet of a dichotomous key to the known species of Reticulitermes found in Georgia, USA. PMID:26467949

Reduction of [Cp*Sb]4 with Subvalent Main-Group Metal Reductants: Syntheses and Structures of [(L1 Mg)4 (Sb4 )] and [(L2 Ga)2 (Sb4 )] Containing Edge-Missing Sb4 Units.

PubMed

Ganesamoorthy, Chelladurai; Krüger, Julia; Wölper, Christoph; Nizovtsev, Anton S; Schulz, Stephan

2017-02-16

[Cp*Sb] 4 (Cp*=C 5 Me 5 ) reacts with [L 1 Mg] 2 and L 2 Ga with formation of [(L 1 Mg) 4 (μ 4 ,η 1:2:2:2 -Sb 4 )] (L 1 =iPr 2 NC[N(2,6-iPr 2 C 6 H 3 )] 2 , 1) and [(L 2 Ga) 2 (μ,η 2:2 -Sb 4 )] (L 2 =HC[C(Me)N(2,6-iPr 2 C 6 H 3 )] 2 , 2). The cleavage of the Sb-Sb and Sb-C bonds in [Cp*Sb] 4 are the crucial steps in both reactions. The formation of 1 occurred by elimination of the Cp* anion and formation of Cp*MgL 1 , while 2 was formed by reductive elimination of Cp* 2 and oxidative addition of L 2 Ga to the Sb 4 unit. 1 and 2 were characterized by heteronuclear NMR spectroscopy and single-crystal X-ray diffraction, and their bonding situation was studied by quantum chemical calculations. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Generators and automated generator systems for production and on-line injections of pet radiopharmaceuticals

NASA Astrophysics Data System (ADS)

Shimchuk, G.; Shimchuk, Gr; Pakhomov, G.; Avalishvili, G.; Zavrazhnov, G.; Polonsky-Byslaev, I.; Fedotov, A.; Polozov, P.

2017-01-01

One of the prospective directions of PET development is using generator positron radiating nuclides [1,2]. Introduction of this technology is financially promising, since it does not require expensive special accelerator and radiochemical laboratory in the medical institution, which considerably reduces costs of PET diagnostics and makes it available to more patients. POZITOM-PRO RPC LLC developed and produced an 82Sr-82Rb generator, an automated injection system, designed for automatic and fully-controlled injections of 82RbCl produced by this generator, automated radiopharmaceutical synthesis units based on generated 68Ga produced using a domestically-manufactured 68Ge-68Ga generator for preparing two pharmaceuticals: Ga-68-DOTA-TATE and Vascular Ga-68.

Effects of a GaSb buffer layer on an InGaAs overlayer grown on Ge(111) substrates: Strain, twin generation, and surface roughness

NASA Astrophysics Data System (ADS)

Kajikawa, Y.; Nishigaichi, M.; Tenma, S.; Kato, K.; Katsube, S.

2018-04-01

InGaAs layers were grown by molecular-beam epitaxy on nominal and vicinal Ge(111) substrates with inserting GaSb buffer layers. High-resolution X-ray diffraction using symmetric 333 and asymmetric 224 reflections was employed to analyze the crystallographic properties of the grown layers. By using the two reflections, we determined the lattice constants (the unit cell length a and the angle α between axes) of the grown layers with taking into account the rhombohedral distortion of the lattices of the grown layers. This allowed us the independent determination of the strain components (perpendicular and parallel components to the substrate surface, ε⊥ and ε//) and the composition x of the InxGa1-xAs layers by assuming the distortion coefficient D, which is defined as the ratio of ε⊥ against ε//. Furthermore, the twin ratios were determined for the GaSb and the InGaAs layers by comparing asymmetric 224 reflections from the twin domain with that from the normal domain of the layers. As a result, it has been shown that the twin ratio in the InGaAs layer can be decreased to be less than 0.1% by the use of the vicinal substrate together with annealing the GaSb buffer layer during the growth interruption before the InGaAs overgrowth.

The electronic, structural and magnetic properties of Heusler compounds ZrCrCoZ(Z=B, Al, Ga, In): A first-principles study

NASA Astrophysics Data System (ADS)

Guo, R. K.; Liu, G. D.; Lin, T. T.; Wang, W.; Wang, L. Y.; Dai, X. F.

2018-02-01

It is predicted that the ZrCrCoZ(Z=B, Al, Ga, In) compounds with LiMnPbSn-type structure are half-metallic ferrimagnets with a large half-metallic gap by the first-principles calculations. The half-metallicity of the ZrCrCoZ(Z=B, Al, Ga, In) compounds are quite robust to the axial and uniaxial strain. The total magnetic moments in per unit cell are 4 μB for the ZrCrCoZ(Z=B, Al, Ga, In) compounds and follow the Slater-Pauling rule, which can be attributed to the great spin-splitting. The calculated formation energies are negative for all the ZrCrCoZ(Z=B, Al, Ga, In) compounds, which indicates that those compounds are in the thermodynamic stability and the possibility of synthesis in experiment.

A Synthesis and Crystal Chemical Study of the Fast Ion Conductor Li7–3xGaxLa3 Zr2O12 with x = 0.08 to 0.84

PubMed Central

2014-01-01

Fast-conducting phase-pure cubic Ga-bearing Li7La3Zr2O12 was obtained using solid-state synthesis methods with 0.08 to 0.52 Ga3+ pfu in the garnet. An upper limit of 0.72 Ga3+ pfu in garnet was obtained, but the synthesis was accompanied by small amounts of La2Zr2O12 and LiGaO3. The synthetic products were characterized by X-ray powder diffraction, electron microprobe and SEM analyses, ICP-OES measurements, and 71Ga MAS NMR spectroscopy. The unit-cell parameter, a0, of the various garnets does not vary significantly as a function of Ga3+ content, with a value of about 12.984(4) Å. Full chemical analyses for the solid solutions were obtained giving: Li7.08Ga0.06La2.93Zr2.02O12, Li6.50Ga0.15La2.96Zr2.05O12, Li6.48Ga0.23La2.93Zr2.04O12, Li5.93Ga0.36La2.94Zr2.01O12, Li5.38Ga0.53La2.96Zr1.99O12, Li4.82Ga0.60La2.96Zr2.00O12, and Li4.53Ga0.72La2.94Zr1.98O12. The NMR spectra are interpreted as indicating that Ga3+ mainly occurs in a distorted 4-fold coordinated environment that probably corresponds to the general 96h crystallographic site of garnet. PMID:24874559

K and Ba distribution in the structures of the clathrate compounds K(x)Ba(16-x)(Ga,Sn)136 (x = 0.8, 4.4, and 12.9) and K(x)Ba(8-x)(Ga,Sn)46 (x = 0.3).

PubMed

Schäfer, Marion C; Bobev, Svilen

2013-04-01

Studies of the K-Ba-Ga-Sn system produced the clathrate compounds K(0.8(2))Ba(15.2(2))Ga(31.0(5))Sn(105.0(5)) [a = 17.0178 (4) Å], K(4.3(3))Ba(11.7(3))Ga(27.4(4))Sn(108.6(4)) [a = 17.0709 (6) Å] and K(12.9(2))Ba(3.1(2))Ga(19.5(4))Sn(116.5(4)) [a = 17.1946 (8) Å], with the type-II structure (cubic, space group Fd3m), and K(7.7(1))Ba(0.3(1))Ga(8.3(4))Sn(37.7(4)) [a = 11.9447 (4) Å], with the type-I structure (cubic, space group Pm3n). For the type-II structures, only the smaller (Ga,Sn)24 pentagonal dodecahedral cages are filled, while the (Ga,Sn)28 hexakaidecahedral cages remain empty. The unit-cell volume is directly correlated with the K:Ba ratio, since an increasing amount of monovalent K occupying the cages causes a decreasing substitution of the smaller Ga in the framework. All three formulae have an electron count that is in good agreement with the Zintl-Klemm rules. For the type-I compound, all framework sites are occupied by a mixture of Ga and Sn atoms, with Ga showing a preference for Wyckoff site 6c. The (Ga,Sn)20 pentagonal dodecahedral cages are occupied by statistically disordered K and Ba atoms, while the (Ga,Sn)24 tetrakaidecahedral cages encapsulate only K atoms. Large anisotropic displacement parameters for K in the latter cages suggest an off-centering of the guest atoms.

Genital Warts -- Initial Visits to Physicians' Offices, United States, 1966 - 2012

MedlinePlus

... 46. Genital Warts — Initial Visits to Physicians’ Offices, United States, 1966 – 2012 Recommend on Facebook Tweet Share Compartir ... OIG 1600 Clifton Road Atlanta , GA 30329-4027 USA 800-CDC-INFO (800-232-4636) , TTY: 888- ...

First principle calculation in FeCo overlayer on GaAs substrate

DOE Office of Scientific and Technical Information (OSTI.GOV)

Jain, Vishal, E-mail: vjain045@gmail.com; Lakshmi, N.; Jain, Vivek Kumar

In this work the first principle electronic structure calculation is reported for FeCo/GaAs thin film system to investigate the effect of orientation on the electronic structural properties. A unit cell describing FeCo layers and GaAs layers is constructed for (100), (110), (111) orientation with vacuum of 30Å to reduce dimensions. It is found that although the (110) orientation is energetically more favorable than others, the magnetic moment is quite large in (100) and (111) system compared to the (110) and is due to the total DOS variation with orientation.

In vivo evaluation of a radiogallium-labeled bifunctional radiopharmaceutical, Ga-DOTA-MN2, for hypoxic tumor imaging.

PubMed

Sano, Kohei; Okada, Mayumi; Hisada, Hayato; Shimokawa, Kenta; Saji, Hideo; Maeda, Minoru; Mukai, Takahiro

2013-01-01

On the basis of the findings obtained by X-ray crystallography of Ga-DOTA chelates and the drug design concept of bifunctional radiopharmaceuticals, we previously designed and synthesized a radiogallium-labeled DOTA chelate containing two metronidazole moieties, (67)Ga-DOTA-MN2, for hypoxic tumor imaging. As expected, (67)Ga-DOTA-MN2 exhibited high in vivo stability, although two carboxyl groups in the DOTA skeleton were conjugated with metronidazole moieties. In this study, we evaluated (67/68)Ga-DOTA-MN2 as a nuclear imaging agent for hypoxic tumors. (67)Ga-labeling of DOTA-MN2 with (67)GaCl(3) was achieved with high radiochemical yield (>85%) by 1-min of microwave irradiation (50 W). The pharmacokinetics of (67)Ga-DOTA-MN2 were examined in FM3A tumor-bearing mice, and compared with those of (67)Ga-DOTA-MN1 containing one metronidazole unit and (67)Ga-DOTA. Upon administration, (67)Ga-DOTA-MN2 exhibited higher accumulation in the implanted tumors than (67)Ga-DOTA. Tumor-to-blood ratios of (67)Ga-DOTA-MN2 were about two-fold higher than those of (67)Ga-DOTA-MN1. Autoradiographic analysis showed the heterogeneous localization of (67)Ga-DOTA-MN2 in the tumors, which corresponds to hypoxic regions suggested by well-established hypoxia marker drug, pimonidazole. Furthermore, in positron emission tomography (PET) study, the tumors of mice administered (68)Ga-labeled DOTA-MN2 were clearly imaged by small-animal PET at 1 h after administration. This study demonstrates the potential usefulness of (67/68)Ga-DOTA-MN2 as a nuclear imaging agent for hypoxic tumors and suggests that two functional moieties, such as metronidazole, can be conjugated to radiogallium-DOTA chelate without reducing the complex stability. The present findings provide useful information about the chemical design of radiogallium-labeled radiopharmaceuticals for PET and single photon emission computed tomography (SPECT) studies.

The ERIC Guidebook to the Background Papers for "A Call for Change in Teacher Education: The Report of the National Committee on Excellence in Teacher Education."

ERIC Educational Resources Information Center

ERIC Clearinghouse on Teacher Education, Washington, DC.

This guidebook contains abstracts of papers by the following authors: (1) Michael D. Andrew; (2) Herman E. Behling, Jr.; (3) Ken Carlson; (4) Frederic R. Cyphert and John E. Nichelson; (5) Barbara Dubitsky; (6) David H. Florio; (7) Eva C. Galambos; (8) Hendrik D. Gideonse; (9) Gary A. Griffin; (10) Martin Haberman; (11) Gene Hall, Walter Doyle,…

Development and Evaluation of the Stingray, an Amphibious Maritime Interdiction Operations Unmanned Ground Vehicle

DTIC Science & Technology

2014-05-01

of Ships], Charles Griffin and Company, London, 246-261 (1908). [6] Volpich, H. & Bridge, I . C., “Paddle Wheels Pt 1: Preliminary Model Experiments...Transactions of the Institution of Engineers and Shipbuilders in Scotland, 327-380 (1955). [7] Volpich, H. & Bridge, I . C., “Paddle Wheels...Bridge, I . C., “Paddle Wheels Pt III: Ship/Model Correlation,” Transactions of the Institution of Engineers and Shipbuilders in Scotland, 512-550

KSC-2013-3104

NASA Image and Video Library

2013-07-24

CAPE CANAVERAL, Fla. – Mark Hiebert, of the Running Zone, talks to a Kennedy worker during the National Employee Health and Fitness Day event in the Operations and Checkout Building's Mission Briefing Room. Employees also had the opportunity to be tested for diabetes, enter a raffle for prizes and get a five-minute massage. Other venders shown in the background are Sunseed Co-op’s Marcia Cooney, center, and Bridget Griffin from the YMCA of Titusville. Photo credit: NASA/Daniel Casper

Best Practice in Technology Acquisition: Early Licensing of Technology before or during Prove-Out Phase

DTIC Science & Technology

2005-05-01

purchase” vs. “lease” (Ammons, 2002). Given the nature of such goods (i.e., consumable ), this research project eliminated the alternative of...Ertex and Griffin (2002) explain that a supply chain can be dominated by either supplier or buyer ; they assert that in recent years certain large... buyers have increased dominance over their suppliers. Yet, the DoD has not exerted such dominance over its suppliers. Currently, federal agencies such

Final Report 8201, October 1982.

DTIC Science & Technology

1982-10-01

probabilities for electrostatic fine structure transitions in lithium -like, beryllium-like, and boron-like ions of high nuclear charge. Relativistic effects...and Argon Gases by Lithium Projectiles," with F. K. Chen, G. Lapicki, R. Laubert, S. B. Elston, and R. S. Peterson, Physics Lett. 60A, 292 (1977...in the Lithium - like Ions A1 10*, Sill+, and S13+ ,’ with H. H. Haselton, R. S. Thoe, P. N. Griffin, J. R. Nowat, D. J. Pegg, and R. Peterson

Vortex Shedding from a Vibrating Cable with Attached Spherical Bodies in a Linear Shear Flow.

DTIC Science & Technology

1982-10-27

correlation and strengthened parallel vo:tex shedding. The test model used in the present study was a flexible cable. The vortex street wake behind a vibrating...pattern, different tha. the characteristic patterns associated with either the stationary or vibrating locked-on vortex street wakes was observed... vortex shedding to the vibration of a rigid or flexible cylinder has been explored by Griffin [17]. He presents a model for a universal wake Strouhal

The Analysis and Clustering of Navy Ratings Based on Social Interaction Characteristics: A Literature Review and Conceptual Model

DTIC Science & Technology

1988-06-01

frequency of contact, identity of the initiator of the interaction (Eisenberg, Monge, & Farace , 1984) or the use of various strategies, such as...But most important are the cues the physical environment gives about the social environment (Thomas & Griffin, 1983; Zalesny, Farace , & Kurchner...and Ghana. Journal of Cross-Cultural Psychology, 15(4), 477-4 5. Eisenberg, E. M., Monge, P. R., Farace , R. V. (1984). Coorientation on communication

View of Mission Control Center during the Apollo 13 emergency return

NASA Image and Video Library

1970-04-16

S70-35369 (16 April 1970) --- Discussion in the Mission Operations Control Room (MOCR) dealing with the Apollo 13 crewmen during their final day in space. From left to right are Glynn S. Lunney, Shift 4 flight director; Gerald D. Griffin, Shift 2 flight director; astronaut James A. McDivitt, manager, Apollo Spacecraft Program, MSC; Dr. Donald K. Slayton, director of Flight Crew Operations, MSC; and Dr. Willard R. Hawkins, M.D., Shift 1 flight surgeon.

Remote Munitions Deployment from an Unmanned Ground Vehicle

DTIC Science & Technology

2011-08-09

pack in a series of toe lugs. Then the rear of the pack is pushed downward over a novel spring-loaded latch /release mechanism, remaining locked in...Mason, Patrick R. Griffin, Charles E. Dean Page 4 of 5 UNCLASSIFIED developments and testing, it is not secured by a latch /release mechanism...However, the locating tabs act to wedge the pack in place while still allowing it to pull free during launch. Figure 6: Munitions secured and

OPEC behavior

NASA Astrophysics Data System (ADS)

Yang, Bo

This thesis aims to contribute to a further understanding of the real dynamics of OPEC production behavior and its impacts on the world oil market. A literature review in this area shows that the existing studies on OPEC still have some major deficiencies in theoretical interpretation and empirical estimation technique. After a brief background review in chapter 1, chapter 2 tests Griffin's market-sharing cartel model on the post-Griffin time horizon with a simultaneous system of equations, and an innovative hypothesis of OPEC's behavior (Saudi Arabia in particular) is then proposed based on the estimation results. Chapter 3 first provides a conceptual analysis of OPEC behavior under the framework of non-cooperative collusion with imperfect information. An empirical model is then constructed and estimated. The results of the empirical studies in this thesis strongly support the hypothesis that OPEC has operated as a market-sharing cartel since the early 1980s. In addition, the results also provide some support of the theory of non-cooperative collusion under imperfect information. OPEC members collude under normal circumstances and behave competitively at times in response to imperfect market signals of cartel compliance and some internal attributes. Periodic joint competition conduct plays an important role in sustaining the collusion in the long run. Saudi Arabia acts as the leader of the cartel, accommodating intermediate unfavorable market development and punishing others with a tit-for-tat strategy in extreme circumstances.

The Río de la Plata Craton: a review of units, boundaries, ages and isotopic signature

NASA Astrophysics Data System (ADS)

Oyhantçabal, Pedro; Siegesmund, Siegfried; Wemmer, Klaus

2011-04-01

A review of the lithostratigraphic units in the Río de la Plata Craton and of new and previously published geochronological, isotopic and geophysical data is presented. Sm-Nd TDM model ages between 2.6 and 2.2 Ga characterize the Piedra Alta Terrane of this craton. Crystallization ages between 2.2 and 2.1 Ga for the metamorphic protoliths and 2.1-2.0 Ga for the post-orogenic granitoids indicate juvenile crust, followed by a short period of crustal recycling. Cratonization of this terrane occurred during the late Paleoproterozoic. Younger overprinting is not observed, suggesting it had a thick and strong lithosphere in the Neoproterozoic. A similar scenario is indicated for the Tandilia Belt of Argentina. Sm-Nd TDM model ages for the Nico Pérez Terrane show two main events of crustal growth (3.0-2.6 and 2.3-1.6 Ga). The crystallization ages on zircon ranges between 3.1 and 0.57 Ga, which is evidence for long-lived crustal reworking. The age for cratonization is still uncertain. In the Taquarembó Block, which is considered the prolongation of the Nico Pérez Terrane in southern Brazil, a similar scenario can be observed. These differences together with contrasting geophysical signatures support the redefinition of the Río de la Plata Craton comprising only the Piedra Alta Terrane and the Tandilia Belt. The Sarandí del Yí Shear Zone is regarded as the eastern margin of this Craton.

Gambogic acid-loaded biomimetic nanoparticles in colorectal cancer treatment

PubMed Central

Zhang, Zhen; Qian, Hanqing; Yang, Mi; Li, Rutian; Hu, Jing; Li, Li; Yu, Lixia; Liu, Baorui; Qian, Xiaoping

2017-01-01

Gambogic acid (GA) is expected to be a potential new antitumor drug, but its poor aqueous solubility and inevitable side effects limit its clinical application. Despite these inhe rent defects, various nanocarriers can be used to promote the solubility and tumor targeting of GA, improving antitumor efficiency. In addition, a cell membrane-coated nanoparticle platform that was reported recently, unites the customizability and flexibility of a synthetic copolymer, as well as the functionality and complexity of natural membrane, and is a new synthetic biomimetic nanocarrier with improved stability and biocompatibility. Here, we combined poly(lactic-co-glycolic acid) (PLGA) with red blood-cell membrane (RBCm), and evaluated whether GA-loaded RBCm nanoparticles can retain and improve the antitumor efficacy of GA with relatively lower toxicity in colorectal cancer treatment compared with free GA. We also confirmed the stability, biocompatibility, passive targeting, and few side effects of RBCm-GA/PLGA nanoparticles. We expect to provide a new drug carrier in the treatment of colorectal cancer, which has strong clinical application prospects. In addition, the potential antitumor drug GA and other similar drugs could achieve broader clinical applications via this biomimetic nanocarrier. PMID:28280328

Atypical titration curves for GaAl12 Keggin-ions explained by a joint experimental and simulation approach

NASA Astrophysics Data System (ADS)

Sulpizi, Marialore; Lützenkirchen, Johannes

2018-06-01

Although they have been widely used as models for oxide surfaces, the deprotonation behaviors of the Keggin-ions (MeAl127+) and typical oxide surfaces are very different. On Keggin-ions, the deprotonation occurs over a very narrow pH range at odds with the broad charging curve of larger oxide surfaces. Depending on the Me concentration, the deprotonation curve levels off sooner (high Me concentration) or later (for low Me concentration). The leveling off shows the onset of aggregation before which the Keggin-ions are present as individual units. We show that the atypical titration data previously observed for some GaAl12 solutions in comparison to the originally reported data can be explained by the presence of Ga2Al11 ions. The pKa value of aquo-groups bound to octahedral Ga was determined from ab initio molecular dynamics simulations relative to the pure GaAl12 ions. Using these results within a surface complexation model, the onset of deprotonation of the crude solution is surprisingly well predicted and the ratio between the different species is estimated to be in the proportion 20 (Ga2Al11) : 20 (Al13) : 60 (GaAl12).

Magnetic and absorbing properties of M-type substituted hexaferrites BaFe{sub 12–x}Ga{sub x}O{sub 19} (0.1 < x < 1.2)

DOE Office of Scientific and Technical Information (OSTI.GOV)

Trukhanov, S. V., E-mail: trukhanov@ifttp.bas-net.by; Trukhanov, A. V.; Kostishin, V. G.

2016-09-15

X-ray powder diffraction is used to determine the unit cell parameters and to refine the crystal structure of the solid solutions of M-type hexagonal barium ferrite BaFe{sub 12–x}Ga{sub x}O{sub 19} (x = 0.1–1.2) with isostructural diamagnetic cation Ga{sup 3+} substitution at T = 300 K. As the level of substitution increases, the unit cell parameters are shown to decrease monotonically. The temperature (300 K ≤ T ≤ 750 K, H = 8.6 kOe) and field (T = 300 K,–20 kOe ≤ H ≤ 20 kOe) dependences of the saturation magnetization of these solid solutions are studied with a vibrating-sample magnetometer.more » The concentration dependences of the Curie temperature T{sub C}, the specific spontaneous magnetization, and the coercive force are plotted. The magnetic parameters are found to decrease with increasing substitution. The microwave properties of the solid solutions are analyzed in an external magnetic field (0 ≤ H ≤ 4 kOe). As the cation Ga{sup 3+} concentration increases from x = 0.1 to 0.6, the natural ferromagnetic resonance (NFMR) frequency decreases; as the concentration increases further to x = 1.2, this frequency again increases. As the cation Ga{sup 3+} concentration increases, the NFMR line width increases, which indicates a widening of the frequency range where electromagnetic radiation is intensely absorbed. Here, the resonance curve peak amplitude changes insignificantly. The shift of the NFMR frequency in an applied magnetic field is more pronounced for samples with low cation Ga{sup 3+} concentrations. The role of diamagnetic substitution is revealed, and the prospects and advantages of Ga-substituted beryllium hexaferrite as the material absorbing high-frequency electromagnetic radiation are demonstrated.« less

Biophysical impacts of climate-smart agriculture in the Midwest United States

USDA-ARS?s Scientific Manuscript database

The potential impacts of climate change in the Midwest United States present unprecedented challenges to regional agriculture. In response to these challenges, a variety of climate-smart agricultural methodologies have been proposed to retain or improve crop yields, reduce agricultural greenhouse ga...

Letter from Galo Jackson Final Comments on November 2012 Draft ofthe Remedial Investigation Report fpr Operable Unit 3-Upland Soils

EPA Pesticide Factsheets

Letter from Galo Jackson contains the Final Comments on November 2012 Draft ofthe Remedial Investigation Report for Operable Unit 3-Upland Soils: LCP Chemical National Priorities List Site, Brunswick, Glynn County, GA.

Job Demands-Control-Support model and employee safety performance.

PubMed

Turner, Nick; Stride, Chris B; Carter, Angela J; McCaughey, Deirdre; Carroll, Anthony E

2012-03-01

The aim of this study was to explore whether work characteristics (job demands, job control, social support) comprising Karasek and Theorell's (1990) Job Demands-Control-Support framework predict employee safety performance (safety compliance and safety participation; Neal and Griffin, 2006). We used cross-sectional data of self-reported work characteristics and employee safety performance from 280 healthcare staff (doctors, nurses, and administrative staff) from Emergency Departments of seven hospitals in the United Kingdom. We analyzed these data using a structural equation model that simultaneously regressed safety compliance and safety participation on the main effects of each of the aforementioned work characteristics, their two-way interactions, and the three-way interaction among them, while controlling for demographic, occupational, and organizational characteristics. Social support was positively related to safety compliance, and both job control and the two-way interaction between job control and social support were positively related to safety participation. How work design is related to employee safety performance remains an important area for research and provides insight into how organizations can improve workplace safety. The current findings emphasize the importance of the co-worker in promoting both safety compliance and safety participation. Crown Copyright © 2011. Published by Elsevier Ltd. All rights reserved.

Potential of Targeting PDE1C/2A for Suppressing Metastatic Ovarian Cancers

DTIC Science & Technology

2014-07-01

Shuang Huang CONTRACTING ORGANIZATION: GEORGIA HEALTH SCIENCES UNIVERSITY RESEARCH INSTITUTE, INC. Augusta , GA 30912 REPORT DATE: July 2014 TYPE...WORK UNIT NUMBER 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT NUMBER Georgia Regents University Research...Institute Augusta , GA 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR’S ACRONYM(S) U.S. Army Medical Research and Materiel

Securing General Aviation

DTIC Science & Technology

2008-01-24

operations of large corporate jets and professionally managed fractional-ownership fleets — makes up about one- quarter of all GA operations and... 2018 , it is expected that there will be about 18,000 GA turbojets in service in the United States, compared to an estimate of slightly more than 10,000...spray a chemical blister agent into a packed college football stadium CRS-17 43 White House Homeland Security Council, David Howe, Senior Director for

71Ga-77Se connectivities and proximities in gallium selenide crystal and glass probed by solid-state NMR

NASA Astrophysics Data System (ADS)

Nagashima, Hiroki; Trébosc, Julien; Calvez, Laurent; Pourpoint, Frédérique; Mear, François; Lafon, Olivier; Amoureux, Jean-Paul

2017-09-01

We introduce two-dimensional (2D) 71Ga-77Se through-bond and through-space correlation experiments. Such correlations are achieved using (i) the J-mediated Refocused Insensitive Nuclei Enhanced by Polarization Transfer (J-RINEPT) method with 71Ga excitation and 77Se Carr-Purcell-Meiboon-Gill (CPMG) detection, as well as (ii) the J- or dipolar-mediated Hetero-nuclear Multiple-Quantum Correlation (J- or D-HMQC) schemes with 71Ga excitation and quadrupolar CPMG (QCPMG) detection. These methods are applied to the crystalline β-Ga2Se3 and the 0.2Ga2Se3-0.8GeSe2 glass. Such glass leads to a homogeneous and reproducible glass-ceramic, which is a good alternative to single-crystalline Ge and polycrystalline ZnSe materials for making lenses transparent in the IR range for thermal imaging applications. We show that 2D 71Ga-77Se correlation experiments allow resolving the 77Se signals of molecular units, which are not resolved in the 1D 77Se CPMG spectrum. Additionally, the build-up curves of the J-RINEPT and the J-HMQC experiments allow the estimate of the 71Ga-77Se J-couplings via one and three-bonds in the three-dimensional network of β-Ga2Se3. Furthermore, these build-up curves show that the one-bond 1J71Ga-77Se couplings in the 0.2Ga2Se3-0.8GeSe2 glass are similar to those measured for β-Ga2Se3. We also report 2D 71Ga Satellite Transition Magic-Angle Spinning (STMAS) spectrum of β-Ga2Se3 using QCPMG detection at high magnetic field and high Magic-Angle Spinning frequency using large radio frequency field. Such spectrum allows separating the signal of β-Ga2Se3 and that of an impurity.

Development of a HgCdTe photomixer and impedance matched GaAs FET amplifier

NASA Technical Reports Server (NTRS)

Shanley, J. F.; Paulauskas, W. A.; Taylor, D. R.

1982-01-01

A research program for the development of a 10.6 micron HgCdTe photodiode/GaAs field effect transistor amplifier package for use at cryogenic temperatures (77k). The photodiode/amplifier module achieved a noise equivalent power per unit bandwidth of 5.7 times 10 to the 20th power W/Hz at 2.0 GHz. The heterodyne sensitivity of the HgCdTe photodiode was improved by designing and building a low noise GaAs field effect transistor amplifier operating at 77K. The Johnson noise of the amplifier was reduced at 77K, and thus resulted in an increased photodiode heterodyne sensitivity.

KSC-08pd1808

NASA Image and Video Library

2008-06-23

CAPE CANAVERAL, Fla. – A Senate field hearing held at the Canaveral Port Authority and chaired by Florida Sen. Bill Nelson (third from right on the dais) focuses on workforce related challenges at NASA's Kennedy Space Center and potential solutions to mitigate the transition's effects on the community. The hearing examined issues surrounding the retirement of the space shuttle and the transition to the new Orion/Ares system. At the table representing NASA are Administrator Michael Griffin and Associate Administrator of Space Operations William Gerstenmaier. Photo credit: NASA/Kim Shiflett

KSC-08pd1810

NASA Image and Video Library

2008-06-23

CAPE CANAVERAL, Fla. – A Senate field hearing held at the Canaveral Port Authority and chaired by Florida Sen. Bill Nelson (right) focuses on workforce related challenges at NASA's Kennedy Space Center and potential solutions to mitigate the transition's effects on the community. The hearing examined issues surrounding the retirement of the space shuttle and the transition to the new Orion/Ares system. At the dais with Nelson are NASA Administrator Michael Griffin (left) and Florida Sen. Mel Martinez (center). Photo credit: NASA/Kim Shiflett

KSC-08pd1809

NASA Image and Video Library

2008-06-23

CAPE CANAVERAL, Fla. – A Senate field hearing held at the Canaveral Port Authority and chaired by Florida Sen. Bill Nelson (third from right on the dais) focuses on workforce related challenges at NASA's Kennedy Space Center and potential solutions to mitigate the transition's effects on the community. The hearing examined issues surrounding the retirement of the space shuttle and the transition to the new Orion/Ares system. At the table representing NASA are Administrator Michael Griffin and Associate Administrator of Space Operations William Gerstenmaier. Photo credit: NASA/Kim Shiflett

INFLIGHT - APOLLO X - MSC

NASA Image and Video Library

1969-05-19

S69-34038 (18 May 1969) --- View of activity at the flight director's console in the Mission Operations Control Room in the Mission Control Center, Building 30, on the first day of the Apollo 10 lunar orbit mission. Seated are Gerald D. Griffin (foreground) and Glynn S. Lunney, Shift 1 (Black Team) flight directors. Milton L. Windler, standing behind them, is the flight director of Shift 2 (Maroon Team). In the center background, standing, is Dr. Christopher C. Kraft Jr., MSC Director of Flight Operations.

Asymptotic Description of Damping Mistuning Effects on the Forced Response of Turbomachinery Bladed Disks

DTIC Science & Technology

2012-07-31

damping produced at friction and interface joints. For example, in the case of the turbine wheels produced for turbochargers for the automotive industry...effect of damping mistuning. The AMM can be regarded as an extension of the Fundamental Mistuning Model (FMM) [8, 9, 10] for the very frequent...blisks. presented at the ASME Turbo Expo, Vancouver, Canada, 2011, GT2011- 45611, 2011. [8] D.M. Feiner and J.H. Griffin. A fundamental model of mistuning

Problematizing Assumptions, Examining Dilemmas, and Exploring Promising Possibilities in Culturally Relevant Pedagogy. A Response to "'I Didn't See It as a Cultural Thing': Supervisors of Student Teachers Define and Describe Culturally Responsive Supervision"

ERIC Educational Resources Information Center

Dantas-Whitney, Maria; Ulveland, R. Dana

2016-01-01

In response to the study and recommendations presented in the article "I Didn't See it as a Cultural Thing," written by Linda Griffin, Dyan Watson and Tonda Liggett, we explore three interrelated topics. First, we seek to problematize some of the assumptions in the study. We review some of the authors' approaches and assertions that seem…

Isolation of a pigment-producing strain of Aeromonas liquefaciens from silver salmon (Oncorhynchus kisutch)

USGS Publications Warehouse

Ross, A.J.

1962-01-01

Aeromonas salmonicida, the etiological agent of furunculosis in fish, is distinctive in the field of fish diseases in that it may readily be recognized by the water-soluble reddish-brown pigment formed on culture media containing tyrosine. Additional tests for the identification of this organism include blackening of the colonial growth when flooded with an aqueous solution of p-phenylenediamine and a lack of motility (Griffin, Progressive Fish Culturist 14:74, 1952).

The Best Aircraft for Close Air Support in the Twenty First Century

DTIC Science & Technology

2016-09-01

movement of those forces.”8 In addition to CAS, the Air Force em - ploys its aircraft to perform a myriad of roles during combat operations, such as offen...distance to bombing ranges, and so forth.14 Once these figures are accumulated for each major com- mand’s fleet, the second step is developing a CPFH...the GBU-39 small diameter bomb and the AGM-176 Griffin missile, it is still in operational test and development.26 The new squadron (replacement

STS-120 landing

NASA Image and Video Library

2007-11-07

(left to right) NASA Administrator Michael Griffin, NASA Assistant Administrator for Public Affairs David Mould and NASA Space Shuttle Manager Wayne Hale watch as the space shuttle Discovery comes in for landing at NASA's Kennedy Space Center, Fla., completing the 15-day STS-120 mission to the International Space Station. Discovery landed at 1:01pm EST Wednesday after a mission that included on-orbit construction of the station with the installation of the Harmony Node 2 module and the relocation of the P6 truss. Photo Credit: 'NASA/Bill Ingalls"

07pd3206

NASA Image and Video Library

2007-11-07

(left to right) NASA Administrator Michael Griffin, NASA Assistant Administrator for Public Affairs David Mould and NASA Space Shuttle Manager Wayne Hale watch as the space shuttle Discovery comes in for landing at NASA's Kennedy Space Center, Fla., completing the 15-day STS-120 mission to the International Space Station. Discovery landed at 1:01pm EST Wednesday after a mission that included on-orbit construction of the station with the installation of the Harmony Node 2 module and the relocation of the P6 truss. Photo Credit: 'NASA/Bill Ingalls"

Novel Polymers Containing Metal Ligands in the Side Chain

DTIC Science & Technology

2012-10-01

10 2011): 0. doi: 10.1021/bm2010142 2012/10/01 15:35:02 10 Jun Cui, Melissa A. Lackey, Ahmad E. Madkour , Erika M. Saffer, David M. Griffin, Surita R...values for the linear fits are around 0.98. [M] denotes the monomer concentration. M- H measurement. If the RTF behavior of the previously...magnetization as a function of the applied field (M- H ) was measured at room temperature by a superconducting quantum interference device (SQUID) for all of

Engineers and technicians in the control room at the Dryden Flight Research Center must constantly monitor critical operations and checks during research projects like NASA's hypersonic X-43A

NASA Image and Video Library

2004-01-24

Engineers and technicians in the control room at the Dryden Flight Research Center must constantly monitor critical operations and checks during research projects like NASA's hypersonic X-43A. Visible in the photo, taken two days before the X-43's captive carry flight in January 2004, are [foreground to background]; Tony Kawano (Range Safety Officer), Brad Neal (Mission Controller), and Griffin Corpening (Test Conductor).

KSC-08pd0112

NASA Image and Video Library

2008-02-01

KENNEDY SPACE CENTER, FLA. -- (From left) NASA Associate Administrator for Space Operations William Gerstenmaier; Evelyn Husband-Thompson, widow of Colonel Rick Husband, who died in the space shuttle Columbia accident; and NASA Administrator Michael Griffin pause in front of the flowers left in remembrance of the fallen heroes. Kennedy marked the NASA Day of Remembrance with special ceremonies. This year the crew of Columbia was remembered in a special way on the day that marked the fifth anniversary of the Columbia accident. Photo credit: NASA/Kim Shiflett

House Hearing Nunn-McCurdy Review of NPOESS

NASA Image and Video Library

2006-06-07

NOAA Administrator, Vice Admiral Conrad C. Lautenbacher, Jr., U.S. Navy (Ret.), left, NASA Administrator Michael Griffin and Under Secretary of the Air Force Dr. Ronald Sega, right, testify before the House Committee on Science and Technology regarding the future of the National Polar-orbiting Operational Environmental Satellite System (NPOESS) and results of the Nunn-McCurdy review of NOAA’s weather satellite program, Thursday, June 8, 2006, at the Rayburn House Office Building in Washington. Photo Credit: (NASA/Bill Ingalls)

House Hearing Nunn-McCurdy Review of NPOESS

NASA Image and Video Library

2006-06-08

NOAA Administrator, Vice Admiral Conrad C. Lautenbacher, Jr., U.S. Navy (Ret.), left, NASA Administrator Michael Griffin and Under Secretary of the Air Force Dr. Ronald Sega, right, testify before the House Committee on Science and Technology regarding the future of the National Polar-orbiting Operational Environmental Satellite System (NPOESS) and results of the Nunn-McCurdy review of NOAA’s weather satellite program, Thursday, June 8, 2006, at the Rayburn House Office Building in Washington. Photo Credit: (NASA/Bill Ingalls)

Entropic Elastic Processes in Protein Mechanisms. Part 2. Simple (Passive) and Coupled (Active) Development of Elastic Forces,

DTIC Science & Technology

1986-01-01

al., 1985; Pethig, 1979; Zana and Tondre, 1972; Schneider, et al., 1969; Cho, et al., 1985). Interestingly an increase in ultrasonic absorption has...Health Hazards of Microwave Radiation (Czerski, P., ed.), Polish Medical Publishers, Warsaw, Poland, pp. 152-159. Senior, R. M., Griffin, G. L., Mecham...and Oosawa, F. (1985). Nature 316, 366-369. Zana , R. and Tondre, C. (1972). J. Phys. Chem. 76, 1737-1743. Figure Legends: Figure Primary structure of

Improved Healing of Large, Osseous, Segmental Defects by Reverse Dynamization: Evaluation in a Sheep Model

DTIC Science & Technology

2015-10-01

IFM ) through the separated bone cortices (fracture gap). In research funded by a CDMRP Idea Development Award, we used a rat segmental defect...491, 2011. [3] V. Glatt, M . Miller, a Ivkovic, F. Liu, N. Parry, D. Griffin, M . Vrahas, and C. Evans, “Improved healing of large segmental defects...2012. [4] M . Mehta, S . Checa, J. Lienau, D. Hutmacher, and G. N. Duda, “In vivo tracking of segmental bone defect healing reveals that callus

STS-114 Homecoming Ceremony

NASA Image and Video Library

2005-08-10

JSC2005-E-33356 (10 August 2005) --- U.S. Senator Kay Bailey Hutchison (R.-Texas) speaks to a crowd on hand at Ellington Field’s Hangar 276 near Johnson Space Center (JSC) during the STS-114 crew return ceremonies. Seated (from the left) are NASA Administrator Michael Griffin; astronauts Eileen M. Collins, commander; James M. Kelly, pilot; Soichi Noguchi, mission specialist representing Japan Aerospace Exploration Agency (JAXA); Stephen K. Robinson, mission specialist. Not pictured are astronauts Andrew S. W. Thomas, Wendy B. Lawrence and Charles J. Camarda, mission specialists.

Mapping of Monoclonal Antibody Binding Sites on CNBr Fragments of the S- Layer Protein Antigens of Rickettsia Typhi and Rickettsia Prowazekii

DTIC Science & Technology

1992-01-01

proita:ekii SPA each constitutes 10-15% of the total Research and Development Command. Research Task No cellular protein and is readily released by...modification. Selected in spaP (Carl et al., 1990). A stretch of amino acid which subsets of eucaryotic cellular proteins and bears some sequence...Publish- in procaryotes . J. Bacteriol. 170, 2891-2897. ing House of the Slovak Academy of Sciences, Bratislava. Streuli C. H. and Griffin B. E. (1987

KSC-05PD-1535

NASA Technical Reports Server (NTRS)

2005-01-01

KENNEDY SPACE CENTER, FLA. Against a sunrise-painted sky at NASA Kennedy Space Center, Miles OBrien (left), co-anchor on CNNs American Morning, talks on air with NASA Administrator Mike Griffin about the pending launch of Space Shuttle Discovery on the historic Return to Flight mission STS-114. It is the 114th Space Shuttle flight and the 31st for Discovery. The 12-day mission is expected to end with touchdown at the Shuttle Landing Facility at 11:06 a.m. July 25.

Spontaneous formation of three-dimensionally ordered Bi-rich nanostructures within GaAs1-x Bi x /GaAs quantum wells

NASA Astrophysics Data System (ADS)

Luna, E.; Wu, M.; Hanke, M.; Puustinen, J.; Guina, M.; Trampert, A.

2016-08-01

In this work, we report on the spontaneous formation of ordered arrays of nanometer-sized Bi-rich structures due to lateral composition modulations in Ga(As,Bi)/GaAs quantum wells grown by molecular beam epitaxy. The overall microstructure and chemical distribution is investigated using transmission electron microscopy. The information is complemented by synchrotron x-ray grazing incidence diffraction, which provides insight into the in-plane arrangement. Due to the vertical inheritance of the lateral modulation, the Bi-rich nanostructures eventually shape into a three-dimensional assembly. Whereas the Bi-rich nanostructures are created via two-dimensional phase separation at the growing surface, our results suggest that the process is assisted by Bi segregation which is demonstrated to be strong and more complex than expected, implying both lateral and vertical (surface segregation) mass transport. As demonstrated here, the inherent thermodynamic miscibility gap of Ga(As,Bi) alloys can be exploited to create highly uniform Bi-rich units embedded in a quantum confinement structure.

Early Mesozoic paleogeography and tectonic evolution of the western United States: Insights from detrital zircon U-Pb geochronology, Blue Mountains Province, northeastern Oregon

USGS Publications Warehouse

LaMaskin, Todd A.; Vervoort, J.D.; Dorsey, R.J.; Wright, J.E.

2011-01-01

This study assesses early Mesozoic provenance linkages and paleogeographic-tectonic models for the western United States based on new petrographic and detrital zircon data from Triassic and Jurassic sandstones of the "Izee" and Olds Ferry terranes of the Blue Mountains Province, northeastern Oregon. Triassic sediments were likely derived from the Baker terrane offshore accretionary subduction complex and are dominated by Late Archean (ca. 2.7-2.5 Ga), Late Paleoproterozoic (ca. 2.2-1.6 Ga), and Paleozoic (ca. 380-255 Ma) detrital zircon grains. These detrital ages suggest that portions of the Baker terrane have a genetic affinity with other Cordilleran accretionary subduction complexes of the western United States, including those in the Northern Sierra and Eastern Klamath terranes. The abundance of Precambrian grains in detritus derived from an offshore complex highlights the importance of sediment reworking. Jurassic sediments are dominated by Mesozoic detrital ages (ca. 230-160 Ma), contain significant amounts of Paleozoic (ca. 290, 380-350, 480-415 Ma), Neoproterozoic (ca. 675-575 Ma), and Mesoproterozoic grains (ca. 1.4-1.0 Ga), and have lesser quantities of Late Paleoproterozoic grains (ca. 2.1-1.7 Ga). Detrital zircon ages in Jurassic sediments closely resemble well-documented age distributions in transcontinental sands of Ouachita-Appalachian provenance that were transported across the southwestern United States and modified by input from cratonal, miogeoclinal, and Cordilleran-arc sources during Triassic and Jurassic time. Jurassic sediments likely were derived from the Cordilleran arc and an orogenic highland in Nevada that yielded recycled sand from uplifted Triassic backarc basin deposits. Our data suggest that numerous Jurassic Cordilleran basins formed close to the Cordilleran margin and support a model for moderate post-Jurassic translation (~400 km) of the Blue Mountains Province. ?? 2011 Geological Society of America.

National Waterways Study. Review of National Defense Emergency and Safety Issues Affecting the Waterways.

DTIC Science & Technology

1981-07-01

Sheffield, AL Arkansas River Fort Chaffee Fort Smith , AR Pine Bluff Arsenal Pine Bluff, AR Gulf Coast East Fort Benning Columbus, GA Middle Atlantic...Pittsburgh District, United States Army Corps of Engineers. Pittsburgh, Pennsylvania: United States Army Corps of Engineers [no date]. MacLeay, Lachlan

United States Air Force Summary, Fifth Edition

DTIC Science & Technology

1979-03-01

t911 COPPER BAUXITE UNITED STATES ZINC CBROIJJI. C!’ NICKEL SOURCE. CIA -HANDBOOK OF ECONOMIC STATISTICS, 19711 IINC it IANSINESE COBALT IRON().pueUI...Wilson, Charles (TX) Boggs, Lindy (Mrs. Hole)(LA) Benjomin, Adam Jr. (IN) Dicks, Norman D. (WAI McHugh "Mafhew F. (NY) Ginn, So (GA) lehman, Williom

Screening for retinopathy of prematurity in a large tertiary neonatal intensive care unit in Turkey: frequency and risk factors.

PubMed

Sarikabadayi, Yusuf Unal; Aydemir, Ozge; Ozen, Zuhal Tunay; Aydemir, Cumhur; Tok, Levent; Oguz, Serife Suna; Erdeve, Omer; Uras, Nurdan; Dilmen, Ugur

2011-12-01

We aimed to determine applicable guidelines for screening of retinopathy of prematurity (ROP), and evaluate the contribution of risk factors for severe ROP. A prospective cohort study of neonates with a gestational age (GA) < 34 weeks or birth weight < 2000g who were admitted to the Neonatal Intensive Care Unit (NICU) of a tertiary level hospital was conducted. The study group was classified into three groups according to eye examination findings as no ROP, mild ROP and severe ROP. Of the 700 neonates screened, the frequencies of ROP for any stage and severe ROP were 32.7% and 3.1%, respectively. Laser photocoagulation was needed in 9.6% of neonates with ROP. None of the neonates with a GA ≥ 31 weeks required treatment. Any ROP was detected in 199 (53.6%) of the babies < 32 weeks (n = 371), 22 (5.9%) of whom were treated with laser photocoagulation. Independent risk factors for severe ROP in babies < 32 weeks GA were birth weight, duration of mechanical ventilation and patent ductus arteriosus (PDA). This is the largest prospective cohort study including infants younger than 34 weeks GA from Turkey. Our data which belongs to the last 1-year period shows lower incidence of severe ROP when compared to previous reports from Turkey. According to our data, screening babies smaller than 32 weeks GA or 1500g birth weight seems reasonable. In the presence of long duration of mechanical ventilation and PDA, screening should be intensified.

Regional anesthesia in patients with pregnancy induced hypertension

PubMed Central

Ankichetty, Saravanan P; Chin, Ki Jinn; Chan, Vincent W; Sahajanandan, Raj; Tan, Hungling; Grewal, Anju; Perlas, Anahi

2013-01-01

Pregnancy induced hypertension is a hypertensive disorder, which occurs in 5% to 7% of all pregnancies. These parturients present to the labour and delivery unit ranging from gestational hypertension to HELLP syndrome. It is essential to understand the various clinical conditions that may mimic preeclampsia and the urgency of cesarean delivery, which may improve perinatal outcome. The administration of general anesthesia (GA) increases morbidity and mortality in both mother and baby. The provision of regional anesthesia when possible maintains uteroplacental blood flow, avoids the complications with GA, improves maternal and neonatal outcome. The use of ultrasound may increase the success rate. This review emphasizes on the regional anesthetic considerations when such parturients present to the labor and delivery unit. PMID:24249977

DOE Office of Scientific and Technical Information (OSTI.GOV)

Doebrich, J.L.; Murchey, B.L.; Theodore, T.G.

Recently completed 1:24,000-scale geologic mapping and biostratigraphic studies of the Mississippian, Pennsylvanian, and Permian Havallah sequence in the Valmy, North Peak, and Antler Peak quadrangles of the Battle Mountain area have documented a significant amount of imbricate thrusting in the Golconda allochthon (GA) and defined depositional environments that existed in the Havallah basin. Furthermore, the Willow Creek thrust (WCT) is identified as a major N-striking W-dipping structure, fairly continuous through the quadrangles, that tectonically subdivides the allochthon into two lithotectonic units. Pennsylvanian and Permian slope deposits comprise lithotectonic unit 1 (LT1), the footwall of the WCT. LT1 consists of amore » coarsening upward sequence of sponge-spicule chert and argillite, and cherty shale, which are tectonically cut out near Trenton Canyon such that the WCT becomes the sole of the GA. Mississippian basin deposits and Pennsylvanian and Permian turbidites comprise lithotectonic unit 2 (LT2), the hanging wall of the WCT. LT2 consists of a coarsening and shallowing upward sequence of Mississippian radiolarian chert and shale, overlain by Pennsylvanian and Permian calcareous siltstone and sandstone, pebble conglomerate, and pebbly to micritic limestone. Oncolitic coatings on fossil fragments in some calcareous sands high in the stacking pattern suggest environments as shallow as 20 m. Most modes of quartz- and calcite-framework dominant sands plot in quartzose recycled orogen fields; however, compositional facies with abundant chert fragments are rare in contrast with quartz-chert petrofacies sands reported for the GA in the Mount Tobin area. Extrabasinal carbonate grains at framework sites may have been derived from elevated fault blocks or platforms west of the Antler highlands. These studies confirm that turbiditic rocks in the GA show ample evidence in their provenance for having attachments to a nearby continental margin.« less

Changes in management policies for extremely preterm births and neonatal outcomes from 2003 to 2012: two population-based studies in ten European regions.

PubMed

Bonet, M; Cuttini, M; Piedvache, A; Boyle, E M; Jarreau, P H; Kollée, L; Maier, R F; Milligan, Dwa; Van Reempts, P; Weber, T; Barros, H; Gadzinowki, J; Draper, E S; Zeitlin, J

2017-09-01

To investigate changes in maternity and neonatal unit policies towards extremely preterm infants (EPTIs) between 2003 and 2012, and concurrent trends in their mortality and morbidity in ten European regions. Population-based cohort studies in 2003 (MOSAIC study) and 2011/2012 (EPICE study) and questionnaires from hospitals. 70 hospitals in ten European regions. Infants born at <27 weeks of gestational age (GA) in hospitals participating in both the MOSAIC and EPICE studies (1240 in 2003, 1293 in 2011/2012). We used McNemar's Chi 2 test, paired t-tests and conditional logistic regression for comparisons over time. Reported policies, mortality and morbidity of EPTIs. The lowest GA at which maternity units reported performing a caesarean section for acute distress of a singleton non-malformed fetus decreased from an average of 24.7 to 24.1 weeks (P < 0.01) when parents were in favour of active management, and 26.1 to 25.2 weeks (P = 0.01) when parents were against. Units reported that neonatologists were called more often for spontaneous deliveries starting at 22 weeks GA in 2012 and more often made decisions about active resuscitation alone, rather than in multidisciplinary teams. In-hospital mortality after live birth for EPTIs decreased from 50% to 42% (P < 0.01). Units reporting more active management in 2012 than 2003 had higher mortality in 2003 (55% versus 43%; P < 0.01) and experienced larger declines (55 to 44%; P < 0.001) than units where policies stayed the same (43 to 37%; P = 0.1). European hospitals reporting changes in management policies experienced larger survival gains for EPTIs. Changes in reported policies for management of extremely preterm births were related to mortality declines. © 2017 Royal College of Obstetricians and Gynaecologists.

Structure and Properties of Modified and Charge-Compensated Chalcogenide Glasses in the Na/Ba-Ga-Ge Selenide System

NASA Astrophysics Data System (ADS)

Mao, Alvin W.

Chalcogenide glasses exhibit unique optical properties such as infrared transparency owing to the low-phonon energies, optical non-linearity, and photo-induced effects that have important consequences for a wide range of technological applications. However, to fully utilize these properties, it is necessary to better understand the atomic-scale structure and structure-property relationships in this important class of materials. Of particular interest in this regard are glasses in the stoichiometric system Na2Se/BaSe--Ga 2Se3--GeSe2 as they are isoelectronic with the well-studied, oxide glasses of the type M2O(M'O)--Al 2O3--SiO2 (M = alkali, M' = alkaline earth). This dissertation investigates the structure of stoichiometric Na 2Se/BaSe--Ga2Se3--GeSe2 and off-stoichiometric BaSe--Ga2Se3--GeSe 2+/-Se glasses using a combination of Fourier-transform Raman and solid state nuclear magnetic resonance (NMR) spectroscopies. The spectroscopic data is then compared to composition-dependent trends in physical properties such as density, optical band gap, glass transition temperature, and melt fragility to develop predictive structural models of the short- and intermediate-range order in the glass network. These models significantly improve our current understanding of the effects of modifier addition on the structure and properties of chalcogenide glasses, and thus enable a more efficient engineering of these highly functional materials for applications as solid electrolytes in batteries or as optical components in infrared photonics. In general, the underlying stoichiometric Ga2Se3--GeSe 2 network consists primarily of corner-sharing (Ga/Ge)Se4 tetrahedra, where the coordination numbers of Ga, Ge, and Se are 4, 4, and 2, respectively. Some edge-sharing exists, but this configuration is relatively unstable and its concentration tends to decrease with any deviation from the GeSe2 composition. Due to the tetrahedral coordination of Ga, the initial addition of Se-deficient Ga2Se3 to GeSe 2 results in the preferential formation of Ge-Ge bonds, which are distributed such that the clustering of ethane-like (Se3)Ge-Ge(Se3) units is avoided to the maximum extent. This behavior is entirely consistent with the continuously-alloyed structural scenario of chalcogenide glasses. However, for contents of Ga2Se3 greater than about 25--30 mol%, the avoidance of Ga-Ga and mixed Ga-Ge bonds results in the appearance of three-coordinated Se as an alternate mechanism to accommodate the Se deficiency. The addition of either Na2Se or BaSe to Ga2Se 3--GeSe2 glasses introduces an ionic bonding character to an otherwise largely covalently bonded network. As a result, the structure responds by adopting characteristics of the charge-compensated structural scenario of oxide glasses. In the stoichiometric Na2Se/BaSe--Ga 2Se3--GeSe2 glasses, the ratio of Na 2Se/BaSe:Ga2Se3 = 1 serves as a chemical threshold, where the network consists predominantly of corner-sharing (Ga/Ge)e4 tetrahedra, and the charge on the Na(Ba) cations is balanced by the GaSe4- tetrahedra. For glasses with Na 2Se/BaSe:Ga2Se3 < 1, the addition of Se-deficient Ga2Se3 induces the formation of Ge-Ge bonds. However, for glasses with Na2Se/BaSe:Ga2Se3 > 1, the addition of Na2Se/BaSe results in the formation of non-bridging Se atoms, which break up the connectivity of the glassy network. The major difference between the modifying elements Na and Ba is that the high field strength of the Ba cation induces a higher degree of chemical disorder in the glass network. This conclusion is evidenced by the presence of some Ge-Ge bonds in BaSe--Ga2Se3--GeSe2 glasses even at the chemical threshold composition of BaSe:Ga2Se3 = 1. The structural duality of the Na2Se/BaSe--Ga2Se 3--GeSe2 system is best observed in the off-stoichiometric BaSe--Ga2Se3--GeSe2+/-Se glasses. Here, the removal of Se from a stoichiometric glass with BaSe:Ga2Se 3 > 1 results in Ge-Ge bonds, while its addition in excess of stoichiometry forms Se-Se bonds. Although such behavior is consistent with the continuously-alloyed structural model, it should be contrasted with the response of the network to the removal or addition of BaSe. In the latter case especially, the network responds with the formation of non-bridging Se atoms, which is reminiscent of the charge-compensated structural scenario. The aforementioned structural conclusions are supported by trends in physical properties. Of all the properties measured, the glass transition temperature Tg responds most predictably to changes in glass structure in the sense that the removal of heteropolar (Ga/Ge)-Se bonds from the glassy network consistently results in a decrease in Tg. Indeed, Tg is observed to be maximized around chemical threshold compositions that are expected to have a fully-connected network of (Ga/Ge)Se¬4 tetrahedra. The formation of homopolar Ge-Ge bonds causes Tg to drop by ~40--80 °C, while the formation of Se-Se and/or non-bridging Se causes Tg to decrease by at least 120 °C. Trends in density reflect both the packing efficiency of the structural units within the glassy network as well as the masses of the constituent elements, and are generally observed to increase or decrease monotonically. As a result, an increase in density is associated with: 1) the removal of inefficiently packed structural units such as edge-sharing tetrahedra, 2) the formation of efficiently packed units such as three-coordinated Se atoms, 3) the removal of lighter elements like Na, and 4) the addition of heavier elements like Ba. Optical band gap is related to the bonding character within the glassy network, and tends to decrease as the bonding character becomes increasingly metallic. Therefore, a decrease in optical band gap is observed with the formation of homopolar Ge-Ge bonds when Ga2Se3 is added to GeSe2. However, the stoichiometric BaSe--Ga2Se 3--GeSe2 glasses show an anomaly in this regard because optical band gap decreases with the addition of BaSe, and consequently the removal of Ge-Ge bonds. This observation was ascribed instead to the formation of Ba-Se bonds, which are associated with a lower bandgap compared to the (Ga/Ge)-Se bonds that they replace. Finally, there is no straightforward structural explanation for trends in fragility, because it is related to the number of structural configurations dynamically available to the supercooled liquid. In the binary Ga2Se3--GeSe2 glasses, the fragility tends to increase with the formation of homopolar Ge-Ge bonds, which is consistent with other chalcogenide systems in which fragility increases with the removal of heteropolar bonds within corner-sharing tetrahedra and pyramids. In the stoichiometric BaSe--Ga2Se3--GeSe2 glasses on the other hand, a shift in trend near the compositions where BaSe:Ga 2Se3 = 1 coincides with a structural shift between the formation of Ge-Ge bonds and Se-Se/non-bridging Se.

STS-121: Discovery Post Flight Readiness Review Briefing

NASA Technical Reports Server (NTRS)

2006-01-01

This post Flight Readiness Review (FRR) briefing begins with NASA Press Secretary Dean Acosta, introducing the panel who consist of: NASA Administrator, Dr. Michael Griffin; Associate Administrator for Space Operations, Bill Gerstenmaier; Space Shuttle Program Manager, Wayne Hale; and NASA Launch director, Mike Leinbach. The discussion begins with Dr. Michael Griffin, who expresses his gladness to be a part of the FRR. Bill Gerstenmaier talks about how they were very thorough about the subjects reviewed and that they wanted to make sure that they were ready to fly. He discusses and presents two slides. The first slide is a description of the LO2 intertank and LH2 ice/frost ramps staging location and the second are the top ten LH2 Ice/Frost Ramp Foam Loss events. Wayne Hale gives his thoughts on the human element that came into play during the FRRs. He talks about the willingness of everyone to speak their mind, instead of giving short comments. He expressed that this element is a huge step forward for NASA. Mike Leinbach reports on the processing of the vehicle and expresses that everything is going well and there is nothing to prohibit the launch. He also gives a good report on Atlantis, in case there is a need to use the vehicle. This FRR briefing ends with a short question and answer period from the press on topics such as debris, foam loss, ice/frost ramp redesign, crew risks, and launch date.

Hot-electron real-space transfer and longitudinal transport in dual AlGaN/AlN/{AlGaN/GaN} channels

NASA Astrophysics Data System (ADS)

Šermukšnis, E.; Liberis, J.; Matulionis, A.; Avrutin, V.; Ferreyra, R.; Özgür, Ü.; Morkoç, H.

2015-03-01

Real-space transfer of hot electrons is studied in dual-channel GaN-based heterostructure operated at or near plasmon-optical phonon resonance in order to attain a high electron drift velocity at high current densities. For this study, pulsed electric field is applied in the channel plane of a nominally undoped Al0.3Ga0.7N/AlN/{Al0.15Ga0.85N/GaN} structure with a composite channel of Al0.15Ga0.85N/GaN, where the electrons with a sheet density of 1.4 × 1013 cm-2, estimated from the Hall effect measurements, are confined. The equilibrium electrons are situated predominantly in the Al0.15Ga0.85N layer as confirmed by capacitance-voltage experiment and Schrödinger-Poisson modelling. The main peak of the electron density per unit volume decreases as more electrons occupy the GaN layer at high electric fields. The associated decrease in the plasma frequency induces the plasmon-assisted decay of non-equilibrium optical phonons (hot phonons) confirmed by the decrease in the measured hot-phonon lifetime from 0.95 ps at low electric fields down below 200 fs at fields of E \\gt 4 kV cm-1 as the plasmon-optical phonon resonance is approached. The onset of real-space transfer is resolved from microwave noise measurements: this source of noise dominates for E \\gt 8 kV cm-1. In this range of fields, the longitudinal current exceeds the values measured for a mono channel reference Al0.3Ga0.7N/AlN/GaN structure. The results are explained in terms of the ultrafast decay of hot phonons and reduced alloy scattering caused by the real-space transfer in the composite channel.

Enhanced light extraction from a GaN-based green light-emitting diode with hemicylindrical linear grating structure.

PubMed

Jin, Yuanhao; Yang, Fenglei; Li, Qunqing; Zhu, Zhendong; Zhu, Jun; Fan, Shoushan

2012-07-02

Significant enhancement in the light output from GaN-based green light-emitting diodes (LEDs) was achieved with a hemicylindrical grating structure on the top layer of the diodes. The grating structure was first optimized by the finite-difference time-domain (FDTD) method, which showed that the profile of the grating structure was critical for light extraction efficiency. It was found that the transmission efficiency of the 530 nm light emitted from the inside of the GaN LED increased for incidence angles between 23.58° and 60°. Such a structure was fabricated by electron-beam lithography and an etching method. The light output power from the LED was increased approximately 4.7 times compared with that from a conventional LED. The structure optimization is the key to the great increase in transmission efficiency. Furthermore, the light emitted from the edge of the LED units could be collected and extracted by the grating structures in adjacent LED units, thus enhancing the performance of the whole LED chip.

Implications for late Grenvillian (Rigolet phase) construction of Rodinia using new U-Pb data from the Mars Hill terrane, Tennessee and North Carolina, United States

USGS Publications Warehouse

Aleinikoff, John N.; Southworth, Scott; Merschat, Arthur J.

2013-01-01

New data for zircon (external morphology, cathodoluminescence zoning, and sensitive high resolution ion microprobe [SHRIMP] U-Pb ages) from the Carvers Gap granulite gneiss of the Mars Hill terrane (Tennessee and North Carolina, United States) require reevaluation of interpretations of the age and origin of this rock. The new results indicate that the zircon is detrital and that the sedimentary protolith of this gneiss (and related Cloudland gneiss) was deposited no earlier than ca. 1.02 Ga and was metamorphosed at ca. 0.98 Ga. Tectonic models that included the gneiss as a piece of 1.8 Ga Amazonian crust (perhaps as part of the hypothetical Columbia supercontinent) are now untenable. The remarkably fast cycle of exhumation, erosion, deposition, and deep burial also is characteristic of other late Grenvillian (post-Ottawan) Mesoproterozoic paragneisses that occur throughout the Appalachians. These rocks provide new evidence for the duration of the formation of the Rodinia supercontinent lasting until at least 0.98 Ma.

The 1.1 micrometer and visible emission semiconductor diode lasers. [(AlGa)As lasers

NASA Technical Reports Server (NTRS)

Ladany, I.; Nuese, C. J.; Kressel, H.

1978-01-01

In (AlGa)As, the first of three alloy systems studied, Continuous Wave (CW) operation was obtained at room temperature at a wavelength as low as 7260 A. Reliability in this system was studied in the incoherent mode. Zinc doped devices had significant degradation, whereas Ge or Ge plus Zi doped devices had none. The Al2O3 facet coatings were shown to significantly reduce facet deterioration in all types of lasers, longer wavelength units of that type having accumulated (at the time of writing) 22,000 hours with little if any degradation. A CL study of thin (AlGa)As layers revealed micro fluctuation in composition. A macro-scale fluctuation was observed by electroreflectance. An experimental and theoretical study of the effect of stripe width on the threshold current was carried out. Emission below 7000 A was obtained in VPE grown Ga(AsP) (In,Ga)P with CW operation at 10 C. Lasers and LED's were made by LPE in (InGa) (AsP). Laser thresholds of 5 kA/cm2 were obtained, while LED efficiences were on the order of 2%. Incoherent life test over 6000 hours showed no degradation.

Quaternary non-centrosymmetric sulfide Y4GaSbS9: Syntheses, structures, optical properties and theoretical studies

NASA Astrophysics Data System (ADS)

Wang, Yue; Zou, Xiaochuan; Feng, Xia; Shi, Yongfang; Wu, Liming

2017-01-01

A new rare-earth metal gallium thioantimonate, Y4GaSbS9, has been synthesized successfully via high-temperature solid-state method. Single-crystal X-ray diffraction analyses revealed it adopted a known RE4GaSbS9-structure type in the orthorhombic space group Aba2 (no.41) with a=13.480(4) Å, b=13.790(4) Å, c=13.990(4) Å, V=2600.6(2) Å3 and Z=8. The structure is composed of bimetallic polar (Sb2S5) units and dimeric (GaS4)2 tetrahedra that share vertexes to form a 1D infinite chains 2 ∞ 1Ga 10-, inside which the isolated Y3+ cations and S2- anions. Polycrystalline Y4GaSbS9 shows the weak powder second harmonic generation (SHG) responses of this family, which is about 7.5 times that of the benchmark α-SiO2 in the particle size of 74-106 μm at the laser radiation wavelength of 2050 nm with a non-phase-matchable behavior. In addition, the synthesis, structural characterization, and optical properties as well as theoretical studies are also discussed.

Permissive role of the acidification caused by wheat aleurone layers upon. alpha. -amylase induction by GA sub 3

DOE Office of Scientific and Technical Information (OSTI.GOV)

Rodriguez-Campos, E.; Bernal-Lugo, I.; Hamabata, A.

1989-04-01

Wheat aleurone has the capacity of acidifying the incubation medium in 1 to 2 pH units. The {alpha}-amylase induction by GA{sub 3} in isolated wheat aleurone layers is strongly dependent on acidic pH of the medium (pH < 5). To examine possible mechanisms {sup 35}-Met incorporation into proteins and {alpha}-amylase, in the presence of GA{sub 3} and Ca{sup 2+} at pH, 4, 5 and 6 was studied. Although {sup 35}-Met uptake decreased markedly ({approx} 90%) at pH 4 in thepresence of GA{sub 3}, incorporation into total protein did not change significantly from other conditions. Auto-radiography of SDS-PAGE showed that mostmore » of the amino acid was in the {alpha}-amylase band, meaning that the effect of acidic pH is specific for GA{sub 3} actions on aleurone tissue. On the other hand, an increase of protonated GA{sub 3} diffusion could be ruled out. Also, there was not {alpha}-amylase inactivation at pH 6. These findings point out to the important physiological role of the acidification caused by the aleurone.« less

Trondhjemitic, 1.35-1.31 Ga gneisses of the Mount Holly Complex of Vermont: evidence for an Elzevirian event in the Grenville Basement of the United States Appalachians

USGS Publications Warehouse

Ratcliffe, N.M.; Aleinikoff, J.N.; Burton, W.C.; Karabinos, P.

1991-01-01

A newly recognized suite of trondhjemite-tonalite and dacitic gneiss forms a 10 km wide belt of rocks within the Mount Holly Complex in the central part of the Green Mountain massif. Field relationships and chemistry indicate that these gneisses are calc-alkaline, volcanic, and hypabyssal plutonic rocks older than the Middle Proterozoic regional deformation that affected the Mount Holly Complex. U-Pb zircon dates indicate ages as great as 1.35 Ga for crystallization of the volcanic protoliths and for intrusion of crossing trondhjemite. Tonalitic plutonism continued until 1.31 Ga. The Mount Holly intrusives and volcanics may have formed during 1.35-1.31 Ga ensialic volcanic-arc activity, contemporaneous with ensimatic arc activity during the early part of the Elzevirian phase of the Grenville orogeny. -from Authors

Localized 5f electrons in superconducting PuCoIn₅: consequences for superconductivity in PuCoGa₅.

PubMed

Bauer, E D; Altarawneh, M M; Tobash, P H; Gofryk, K; Ayala-Valenzuela, O E; Mitchell, J N; McDonald, R D; Mielke, C H; Ronning, F; Griveau, J-C; Colineau, E; Eloirdi, R; Caciuffo, R; Scott, B L; Janka, O; Kauzlarich, S M; Thompson, J D

2012-02-08

The physical properties of the first In analog of the PuMGa(5) (M = Co, Rh) family of superconductors, PuCoIn(5), are reported. With its unit cell volume being 28% larger than that of PuCoGa(5), the characteristic spin-fluctuation energy scale of PuCoIn(5) is three to four times smaller than that of PuCoGa(5), which suggests that the Pu 5f electrons are in a more localized state relative to PuCoGa(5). This raises the possibility that the high superconducting transition temperature T(c) = 18.5 K of PuCoGa(5) stems from the proximity to a valence instability, while the superconductivity at T(c) = 2.5 K of PuCoIn(5) is mediated by antiferromagnetic spin fluctuations associated with a quantum critical point.

Non-volatile magnetic random access memory

NASA Technical Reports Server (NTRS)

Katti, Romney R. (Inventor); Stadler, Henry L. (Inventor); Wu, Jiin-Chuan (Inventor)

1994-01-01

Improvements are made in a non-volatile magnetic random access memory. Such a memory is comprised of an array of unit cells, each having a Hall-effect sensor and a thin-film magnetic element made of material having an in-plane, uniaxial anisotropy and in-plane, bipolar remanent magnetization states. The Hall-effect sensor is made more sensitive by using a 1 m thick molecular beam epitaxy grown InAs layer on a silicon substrate by employing a GaAs/AlGaAs/InAlAs superlattice buffering layer. One improvement avoids current shunting problems of matrix architecture. Another improvement reduces the required magnetizing current for the micromagnets. Another improvement relates to the use of GaAs technology wherein high electron-mobility GaAs MESFETs provide faster switching times. Still another improvement relates to a method for configuring the invention as a three-dimensional random access memory.

A major 2.1 Ga event of mafic magmatism in west Africa: An Early stage of crustal accretion

NASA Astrophysics Data System (ADS)

Abouchami, Wafa; Boher, Muriel; Michard, Annie; Albarede, Francis

1990-10-01

Birimian terranes from West Africa (Mauritania, Senegal, Ivory Coast, Burkina Faso, Niger) comprise two major units: a dominantly mafic bimodal volcanic unit and a volcano-detrital unit with mostly felsic to intermediate protolith. Stratigraphic relationships of these units are still a matter of debate but current work suggest that they both formed in a short time interval around 2.1 Ga. Widespread basaltic magmas from the bimodal unit have been analyzed for REE distributions and Sr-Nd isotopes. Three Sm-Nd isochrons on tholeiitic lavas were obtained at 2.229±0.042 Ga and initial ɛNd = 3.6±1.0 for Mauritania, 2.126±0.024 Ga and initial ɛNd = 2.9±0.7 for Burkina Faso, 2.063±0.041 Ga and initial ɛNd = 3.1± .0 for Eastern Senegal, data which compare with the age of 2.11±0.09 Ga and initial ɛNd = 2.1±1.8 obtained in Guyana by Gruau et al. (1985). Samples from other localities (Ivory Coast, Niger) give generally similar results. Although the variations of Sm/Nd ratios and the scatter of ɛNd(T) values from +1.2 to +4.3 preclude a single origin for these magmas, initial isotopic heterogeneities are unlikely to bias significantly the ages given by the isochrons which are in good agreement with U-Pb zircon ages (Boher et al., 1989; unpublished data, 1990). Presence of lavas with frequent pillow structures and sediments virtually free of older recycled components suggests that Birimian terranes formed in ocean basins far from continental influence. The isotopic heterogeneities are not consistent with a MORB-like mantle source. Most lavas are slightly depleted in LREE and inversion of the data through a melting model suggests 5-15 percent melting of a slightly depleted Iherzolite. Strong depletion (Burkina Faso) and slight enrichment (Senegal) are occasionally observed. With a noticeable trend of Ti enrichment with differentiation intermediate between that of MORB and IAT, the geochemical signature of Birimian basalts does not fit the best known geodynamic environments. Back-arc or low-Ti continental flood basalts provide a marginally good agreement but still face some difficulties. Oceanic flood basalts similar to those which form oceanic plateaus (e.g. in the Nauru basin) and later accreted to continents as allochtonous terranes represent the most acceptable modern analogue of many Proterozoic basalts. It is suggested that deep plumes piercing young lithosphere can generate huge amounts of tholeiites in a short time. Birimian basalts, like many Early Proterozoic basalts, may also be viewed as recent equivalents of the Archean greenstone belts. The modern komatiite of Gorgona Island is suggested to fit this model of intraplate volcanism. Although the 2.1 Ga magmatic event in West Africa has gone virtually unnoticed in the literature, it extends over several thousand kilometers and compares with the distribution of mantle-derived magmatic activity in other major orogenic provinces (e.g. Superior). It shows that the growth rate of continents cannot be extrapolated from the data obtained solely from the best studied continents (North America, Europe, Australia). If such large crustal segments were overlooked, a spurious pattern of episodic activity of the mantle could arise.

New multicell model for describing the atomic structure of La{sub 3}Ga{sub 5}SiO{sub 14} piezoelectric crystal: Unit cells of different compositions in the same single crystal

DOE Office of Scientific and Technical Information (OSTI.GOV)

Dudka, A. P., E-mail: dudka@ns.crys.ras.ru

2017-03-15

Accurate X-ray diffraction study of langasite (La{sub 3}Ga{sub 5}SiO{sub 14}) single crystal has been performed using the data obtained on a diffractometer equipped with a CCD area detector at 295 and 90.5 K. Within the known La{sub 3}Ga{sub 5}SiO{sub 14} model, Ga and Si cations jointly occupy the 2d site. A new model of a “multicell” consisting of two different unit cells is proposed. Gallium atoms occupy the 2d site in one of these cells, and silicon atoms occupy this site in the other cell; all other atoms correspondingly coordinate these cations. This structure implements various physical properties exhibited bymore » langasite family crystals. The conclusions are based on processing four data sets obtained with a high resolution (sin θ/λ ≤ 1.35 Å{sup –1}), the results reproduced in repeated experiments, and the high relative precision of the study (sp. gr. P321, Z = 1; at 295 K, a = 8.1652(6) Å, c = 5.0958(5) Å, R/wR = 0.68/0.68%, 3927 independent reflections; at 90.5 K, a = 8.1559(4) Å, c = 5.0913(6) Å, R/wR = 0.92/0.93%, 3928 reflections).« less

"The Capture:" Kidnapping Students' Interests Using the "Guardians of Ga'Hoole"

ERIC Educational Resources Information Center

Bradbury, Leslie; Frye, Beth; Gross, Lisa

2013-01-01

This project describes a fourth-grade unit that integrated science and language arts using the book "The Capture" as a focal point. During the unit, students engaged in science activities and language arts lessons that focused on owls. Students conducted investigations that helped them develop a deeper understanding of the adaptations of…

The petrology, structure and geochemistry of an Archean terrane in the North Snowy Block, Beartooth Mountains, Montana

NASA Astrophysics Data System (ADS)

Mogk, D. W.

1984-12-01

Six major rock units in the North Snowy Block in an Archean mobile belt are recognized between all units representing discontinuities in metamorphic grade, structural style, geochemistry, and isotopic ages. Four of the units occur in NE trending linear belts; the Basement Gneiss; the phyllitic Davis Creek Schist; the mount cowen augen gneis; the Paragneiss unit. Overlying the linear units is the 3.2 Ga old Pine Creek Nappe Complex, an isoclinally folded, middle to upper amphibolite facies, thrust nappe consisting of the Barney Creek Amphibolite, George Lake Marble and Jewel Quartzite. The highest structural units, including a thick sequence of upper amphibolite grade supracrustal rocks and a lower section of injected 3.4 Ga old granitic to tonalitic migmatitic rocks were emplaced on the Columbine Thrust. It is shown that there was secular variation in tectonic style in the Archean of southwest Montana. Three stages are recognized: (1) melting of ancient matic crust produced trondhjemitic continental nuclei; (2) numerous ensialic basins were created and destroyed, resulting in high grade metamorphism and mignatization of supracrustal rocks; and (3) contemporary style plate tectonics resulted in generation of large volumes of andesities and calc-alkaline granitic rocks, transcurrent faulting, and thrust faulting.

40Ar/ 39Ar and paleomagnetic results from Liberia and the Precambrian APW data base for the West African Shield

NASA Astrophysics Data System (ADS)

Onstott, T. C.; Dorbor, J.

Lower amphibolite to granulite facies metamorphic rocks in Nimba County, Liberia have yielded 2.2-2.9 Ga RbSr whole rock ages, indicating that they are part of the Archean Liberian age province. We report a 2040 Ma 4040Ar/ 39Ar plateau date on hornblende from an amphibolite in this region, and suggest that these rocks were also severelyreworked during the Eburnean (˜2.0 Ga) metamorphic episode. 40Ar/ 39Ar analyses of biotite and feldspars from neighboring schists also indicate the presence of two mild thermal events, at 1.5 Ga and 0.6 Ga. Paleomagnetic analyses of samples from these same metamorphic rocks reveal three components of magnetization. The predominant and most stable component (273°E, 21°N) is considered to have been acquired as a result of pos Eburnean uplift and cooling at ˜ 2.0 Ga, whereas the two less stable components with poles at 235°E, 43°N and 16°E, 36°N, probably correlate with the 1.5 Ga and 0.6 Ga thermal pulses, respectively. Rock units from southern Liberia also yield two secondary magnetizations, one at 247°E, 37°N and the other at 104°E, 5°N, and a 1.5 Ga 40Ar/ 39Ar date on plagioclase. Comparison of the paleomagnetic poles corresponding to the ˜2.0 Ga Eburnean component with published paleomagnetic data for West Africa is not consistent with prior interpretations of the polar wander path for West Africa. Our paleomagnetic data, when compared to poles of comparable age from the Kalahari Shield, still suggest that some form of displacement has occurred between the Kalahari and West African Shields since 2.0 Ga.

GaAs Supercomputing: Architecture, Language, And Algorithms For Image Processing

NASA Astrophysics Data System (ADS)

Johl, John T.; Baker, Nick C.

1988-10-01

The application of high-speed GaAs processors in a parallel system matches the demanding computational requirements of image processing. The architecture of the McDonnell Douglas Astronautics Company (MDAC) vector processor is described along with the algorithms and language translator. Most image and signal processing algorithms can utilize parallel processing and show a significant performance improvement over sequential versions. The parallelization performed by this system is within each vector instruction. Since each vector has many elements, each requiring some computation, useful concurrent arithmetic operations can easily be performed. Balancing the memory bandwidth with the computation rate of the processors is an important design consideration for high efficiency and utilization. The architecture features a bus-based execution unit consisting of four to eight 32-bit GaAs RISC microprocessors running at a 200 MHz clock rate for a peak performance of 1.6 BOPS. The execution unit is connected to a vector memory with three buses capable of transferring two input words and one output word every 10 nsec. The address generators inside the vector memory perform different vector addressing modes and feed the data to the execution unit. The functions discussed in this paper include basic MATRIX OPERATIONS, 2-D SPATIAL CONVOLUTION, HISTOGRAM, and FFT. For each of these algorithms, assembly language programs were run on a behavioral model of the system to obtain performance figures.

The temporal variation of Mesoarchaean volcanism in the Suomussalmi greenstone belt, Karelia Province, Eastern Finland

NASA Astrophysics Data System (ADS)

Lehtonen, E.; Heilimo, E.; Halkoaho, T.; Hölttä, P.; Huhma, H.

2017-03-01

This study concentrates in the Kiannanniemi area, situated in the Archaean Suomussalmi greenstone belt, the Karelia Province, Fennoscandian Shield. A zircon U-Pb geochronological study from this area shows that ages of the volcanic rocks are between ca. 2.94 and 2.82 Ga. The results indicate multiphase felsic and intermediate volcanism in three episodes at ca. 2.94, 2.84 and 2.82 Ga, of which the 2.84 Ga event has not been reported earlier from the Suomussalmi greenstone belt. The youngest zircon population in a sedimentary rock sample suggests a depositional age of ≤2.82-2.81 Ga, and the sample contains also ≥2.96 Ga old zircon grains. Based on both new and previously published geochronological data from the volcanic rocks, we propose a chronostratigraphic model for the whole Suomussalmi greenstone belt, dividing it into four units based on their age: Luoma, Tormua, Ahvenlahti, and Mesa-aho. The youngest volcanic rocks in the Suomussalmi greenstone belt are contemporaneous with some of the volcanic rocks recorded from the Kuhmo and Tipasjärvi greenstone belts of the Karelia Province, Finland. The age group ca. 2.94 Ga, however, has not been so far recorded elsewhere. Conversely, in the Suomussalmi greenstone belt, volcanic rocks with an age of ca. 2.80 Ga and sedimentary rocks with depositional ages of <2.75 Ga, frequently found from the Kuhmo and Tipasjärvi greenstone belts, are unknown.

Prediction of survival without morbidity for infants born at under 33 weeks gestational age: a user-friendly graphical tool.

PubMed

Shah, Prakesh S; Ye, Xiang Y; Synnes, Anne; Rouvinez-Bouali, Nicole; Yee, Wendy; Lee, Shoo K

2012-03-01

To develop models and a graphical tool for predicting survival to discharge without major morbidity for infants with a gestational age (GA) at birth of 22-32 weeks using infant information at birth. Retrospective cohort study. Canadian Neonatal Network data for 2003-2008 were utilised. Neonates born between 22 and 32 weeks gestation admitted to neonatal intensive care units in Canada. Survival to discharge without major morbidity defined as survival without severe neurological injury (intraventricular haemorrhage grade 3 or 4 or periventricular leukomalacia), severe retinopathy (stage 3 or higher), necrotising enterocolitis (stage 2 or 3) or chronic lung disease. Of the 17 148 neonates who met the eligibility criteria, 65% survived without major morbidity. Sex and GA at birth were significant predictors. Birth weight (BW) had a significant but non-linear effect on survival without major morbidity. Although maternal information characteristics such as steroid use, improved the prediction of survival without major morbidity, sex, GA at birth and BW for GA predicted survival without major morbidity almost as accurately (area under the curve: 0.84). The graphical tool based on the models showed how the GA and BW for GA interact, to enable prediction of outcomes especially for small and large for GA infants. This graphical tool provides an improved and easily interpretable method to predict survival without major morbidity for very preterm infants at the time of birth. These curves are especially useful for small and large for GA infants.

DFT algorithms for bit-serial GaAs array processor architectures

NASA Technical Reports Server (NTRS)

Mcmillan, Gary B.

1988-01-01

Systems and Processes Engineering Corporation (SPEC) has developed an innovative array processor architecture for computing Fourier transforms and other commonly used signal processing algorithms. This architecture is designed to extract the highest possible array performance from state-of-the-art GaAs technology. SPEC's architectural design includes a high performance RISC processor implemented in GaAs, along with a Floating Point Coprocessor and a unique Array Communications Coprocessor, also implemented in GaAs technology. Together, these data processors represent the latest in technology, both from an architectural and implementation viewpoint. SPEC has examined numerous algorithms and parallel processing architectures to determine the optimum array processor architecture. SPEC has developed an array processor architecture with integral communications ability to provide maximum node connectivity. The Array Communications Coprocessor embeds communications operations directly in the core of the processor architecture. A Floating Point Coprocessor architecture has been defined that utilizes Bit-Serial arithmetic units, operating at very high frequency, to perform floating point operations. These Bit-Serial devices reduce the device integration level and complexity to a level compatible with state-of-the-art GaAs device technology.

Long exciton lifetimes in stacking-fault-free wurtzite GaAs nanowires

DOE Office of Scientific and Technical Information (OSTI.GOV)

Furthmeier, Stephan, E-mail: stephan.furthmeier@ur.de; Dirnberger, Florian; Hubmann, Joachim

We present a combined photoluminescence and transmission electron microscopy study of single GaAs nanowires. Each wire was characterized both in microscopy and spectroscopy, allowing a direct correlation of the optical and the structural properties. By tuning the growth parameters, the nanowire crystal structure is optimized from a highly mixed zincblende–wurtzite structure to pure wurtzite. We find the latter one to be stacking-fault-free over nanowire lengths up to 4.1 μm. We observe the emission of purely wurtzite nanowires to occur only with polarization directions perpendicular to the wurtzite c{sup ^}-axis, as expected from the hexagonal unit cell symmetry. The free exciton recombinationmore » energy in the wurtzite structure is 1.518 eV at 5 K with a narrow linewidth of 4 meV. Most notably, these pure wurtzite nanowires display long carrier recombination lifetimes of up to 11.2 ns, exceeding reported lifetimes in bulk GaAs and state-of-the-art 2D GaAs/AlGaAs heterostructures.« less

3.3 Ga SHRIMP U-Pb zircon age of a felsic metavolcanic rock from the Mundo Novo greenstone belt in the São Francisco craton, Bahia (NE Brazil)

NASA Astrophysics Data System (ADS)

Peucat, J. J.; Mascarenhas, J. F.; Barbosa, J. S. F.; de Souza, S. L.; Marinho, M. M.; Fanning, C. M.; Leite, C. M. M.

2002-07-01

Felsic metavolcanics associated with supracrustal rocks provide U-Pb zircon and Sm-Nd TDM ages of approximately 3.3 Ga, which establish an Archean age of the Mundo Novo greenstone belt. A granodioritic gneiss from the Mairi complex, located on the eastern boundary of the Mundo Novo greenstone belt, exhibits a zircon evaporation minimum age of 3.04 Ga and a Nd model age of 3.2 Ga. These results constrain the occurrence of at least three major geological units in this area: the Archean Mundo Novo greenstone belt, the Archean Mairi gneisses, and the adjoining Paleoproterozoic (<2.1 Ga) Jacobina sedimentary basin. The Jacobina basin follows the same trend as the Archean structure, extending southward to the Contendas-Mirante belt, in which a similar Archean-Paleoproterozoic association appears. We postulate that during the Paleoproterozoic in the eastern margin of the Gavião block, these Archean greenstone belts constituted a zone of weakness along which a late-stage orogenic sedimentary basin developed.

The half-metallicity of LiMgPdSn-type quaternary Heusler alloys FeMnScZ (Z=Al, Ga, In): A first-principle study

NASA Astrophysics Data System (ADS)

Gao, Y. C.; Gao, X.

2015-05-01

Based on the first-principles calculations, quaternary Heusler alloys FeMnScZ (Z=Al, Ga, In) including its phase stability, band gap, the electronic structures and magnetic properties has been studied systematically. We have found that, in terms of the equilibrium lattice constants, FeMnScZ (Z=Al, Ga, In) are half-metallic ferrimagnets, which can sustain the high spin polarization under a very large amount of lattice distortions. The half-metallic band gap in FeMnScZ (Z=Al, Ga, In) alloys originates from the t1u-t2g splitting instead of the eu-t1u splitting. The total magnetic moments are 3μB per unit cell for FeMnScZ (Z=Al, Ga, In) alloys following the Slater-Pauling rule with the total number of valence electrons minus 18 rather than 24. According to the study, the conclusion can be drawn that all of these compounds which have a negative formation energy are possible to be synthesized experimentally.

KSC-08pd1806

NASA Image and Video Library

2008-06-23

CAPE CANAVERAL, Fla. – A Senate field hearing held at the Canaveral Port Authority and chaired by Florida Sen. Bill Nelson (third from right on the dais) focuses on workforce related challenges at NASA's Kennedy Space Center and potential solutions to mitigate the transition's effects on the community. The hearing examined issues surrounding the retirement of the space shuttle and the transition to the new Orion/Ares system. At the table representing NASA are Deputy Associate Administrator of Exploration Systems Doug Cooke, Administrator Michael Griffin and Associate Administrator of Space Operations William Gerstenmaier. Photo credit: NASA/Kim Shiflett

Managing External Relations: The Lifeblood of Mission Success

NASA Technical Reports Server (NTRS)

Dumbacher, Daniel L.

2007-01-01

The slide presentation examines the role of customer and stakeholder relations in the success of space missions. Topics include agency transformation; an overview of project and program experience with a discussion of positions, technical accomplishments, and management lessons learned; and approaches to project success with emphasis on communication. Projects and programs discussed include the Space Shuttle Main Engine System, DC-XA Flight Demonstrator, X-33 Flight Demonstrator, Space Launch Initiative/2nd Generation Reusable Launch Vehicle, X-37 Flight Demonstrator, Constellation (pre Dr. Griffin), Safety and Mission Assurance, and Exploration Launch Projects.

Impact of Anti-Shiga Toxin Type 2 (Stx2) Neutralizing Antibody on Colonization and Pathogenesis of Escherichia Coli O157:H7 in Mice

DTIC Science & Technology

2010-03-17

Infect Immun 56:3099-3109. 86. Fontaine, R. E., S. Arnon, W. T. Martin , T. M. Vernon, Jr., E. J. Gangarosa, J. J. Farmer, 3rd, A. B. Moran, J. H...Bernalier-Donadille, M. Vareille, A. P. Gobert, and C. Martin . 2009. Human microbiota-secreted factors inhibit shiga toxin 303 synthesis by...infective defences in the gastrointestinal tract. Best Pract Res Clin Gastroenterol 17:755-773. 33. Griffin, P. M., L. C. Olmstead, and R. E. Petras

Preventing, Identifying, and Treating Prescription Drug Misuse Among Active-Duty Service Members

DTIC Science & Technology

2017-01-04

tremendous support and assistance that CAPT Kevin L. Klette and LTC Thomas Martin provided to the team. Walid F. Gellad provided guidance regarding...December 28, 1981. Chapman, C. Richard, David L. Lipschitz, Martin  S. Angst, Roger Chou, Richard C. Denisco, Gary W. Donaldson, Perry G. Fine, Kathleen M...Margaret L. Griffin, Marc N. Gourevitch, Deborah L. Haller, Albert L. Hasson, Zhen Huang, Petra Jacobs, Andrzej S. Kosinski, Robert Lindblad, Elinore F

KSC-07pd3206

NASA Image and Video Library

2007-11-07

KENNEDY SPACE CENTER, FLA. -- (From left) NASA Administrator Michael Griffin, NASA Assistant Administrator for Public Affairs David Mould and NASA Space Shuttle Manager Wayne Hale watch as the space shuttle Discovery comes in for landing at NASA's Kennedy Space Center, Fla., completing the 15-day, STS-120 mission to the International Space Station. Discovery landed at 1:01 p.m. EST Wednesday after a mission that included on-orbit construction of the station with the installation of the Harmony Node 2 module and the relocation of the P6 truss. Photo credit: NASA/Bill Ingalls

KSC-2013-3100

NASA Image and Video Library

2013-07-24

CAPE CANAVERAL, Fla. – Linnea Applegate, right, of Grace Equine Rescue and Therapy for Humans, or GERTH, organizes her booth during the National Employee Health and Fitness Day event in the Operations and Checkout Building's Mission Briefing Room. GERTH is a nonprofit organization in Cocoa, Fla., that brings horses, children and adults together in a safe, nurturing and healing environment to promote therapeutic healing. Other vendors shown in the background include Bridget Griffin of the YMCA of Titusville, center, and Sunseed Co-op’s Marcia Cooney, in pink. Photo credit: NASA/Daniel Casper

The New North Korean Problem: History and Responsibilities in the Age of Kim Jong Un

DTIC Science & Technology

2012-03-29

Unfortunately, none of these has come close to fruition. 14 Geun- hye Park , a member of the National Assembly of the Republic of Korea, describes a key...Korean Spring?,” The Washington Quarterly, Winter, 2012. 38 Cha and Anderson, 10. 39 Kim 16. 40 Kim 34. 41 Bluth 88. 42 Geun- Hye Park , “A New Kind of...Griffin, 2004. Park , Geun Hye . “A New Kind of Korea: Building Trust Between Seoul and Pyongyang.” Foreign Affairs 90, no.5(September-October 2011

NASA Shared Services Center breaks ground

NASA Image and Video Library

2006-02-24

NASA officials and elected leaders were on hand for the groundbreaking ceremony of the NASA Shared Services Center Feb. 24, 2006, on the grounds of Stennis Space Center. The NSSC provides agency centralized administrative processing, human resources, procurement and financial services. From left, Louisiana Economic Development Secretary Mike Olivier, Stennis Space Center Director Rick Gilbrech, Computer Sciences Corp. President Michael Laphen, NASA Deputy Administrator Shana Dale, Rep. Gene Taylor, Sen. Trent Lott, Mississippi Gov. Haley Barbour, NASA Administrator Mike Griffin and Shared Services Center Executive Director Arbuthnot use golden shovels to break ground at the site.

KSC-2012-4407

NASA Image and Video Library

2012-08-14

CAPE CANAVERAL, Fla. -- National Space Club Florida Committee Chair Steve Griffin welcomes attendees of the club's August luncheon at the Radisson Resort at the Port in Cape Canaveral, Fla. NASA Commercial Crew Program Manager Ed Mango was the event's guest speaker, discussing the innovative steps the agency is taking with industry partners to develop the next U.S. space transportation capability to and from low Earth orbit, which will eventually be available for use by the U.S. government and other commercial customers. To learn more about the Commercial Crew Program, visit www.nasa.gov/commercialcrew. Photo credit: Kim Shiflett

Proceedings of the Tri-Service Aeromedical Research Panel Fall Technical Meeting, 13-14 November 1984.

DTIC Science & Technology

1984-11-01

P t -.1 41 N a ( d AUTOMATED VISUAL FIELD TESTING Chris A. Johnson, Ph.D. and John L. Keltner , M.D. Department of Ophthalmology University...and D . R. Griffin. 1947. The change in refractive power of the human eye in dim and bright light. J. Opt. Soc. Am. 37:321-336. 2. Leibowitz, H. W. and...Dover, New York (1962). 3. Maddox, E. E. 1893. The Clinical Use of Prisms, pp. 83-92. John Wright and Sons, Bristol, England. 4. Cogan,

STS-121: Discovery Post Launch Press Briefing

NASA Technical Reports Server (NTRS)

2006-01-01

The briefing begins with Dean Acousta (NASA Press Secretary) introducing Michael Griffin (NASA Administrator), Bill Gerstenmaier (Associate Administrator for Space Operations) Wayne Hale (Space Shuttle Program Manager), John Shannon (Chairman, Mission Management Team, JSC), and Mike Leinbach (NASA Launch Director). The teams effort and dedication paid off in the form of a perfect launch and the weather cooperated. The Mission Management Team no problems during inspection. Debris assessment at 2 min. 47 sec. and 4 min. 50 sec. will be discussed when that information becomes available.The floor was then open for questions from the press.

NASA Shared Services Center breaks ground

NASA Technical Reports Server (NTRS)

2006-01-01

NASA officials and elected leaders were on hand for the groundbreaking ceremony of the NASA Shared Services Center Feb. 24, 2006, on the grounds of Stennis Space Center. The NSSC provides agency centralized administrative processing, human resources, procurement and financial services. From left, Louisiana Economic Development Secretary Mike Olivier, Stennis Space Center Director Rick Gilbrech, Computer Sciences Corp. President Michael Laphen, NASA Deputy Administrator Shana Dale, Rep. Gene Taylor, Sen. Trent Lott, Mississippi Gov. Haley Barbour, NASA Administrator Mike Griffin and Shared Services Center Executive Director Arbuthnot use golden shovels to break ground at the site.

KSC-08pd1805

NASA Image and Video Library

2008-06-23

CAPE CANAVERAL, Fla. – A Senate field hearing held at the Canaveral Port Authority and chaired by Florida Sen. Bill Nelson (right) focuses on workforce related challenges at NASA's Kennedy Space Center and potential solutions to mitigate the transition's effects on the community. The hearing examined issues surrounding the retirement of the space shuttle and the transition to the new Orion/Ares system. On the left is Florida Sen. Mel Martinez. NASA was represented by Deputy Associate Administrator of Exploration Systems Doug Cooke, Administrator Michael Griffin and Associate Administrator of Space Operations William Gerstenmaier. Photo credit: NASA/Kim Shiflett

KSC-08pd1807

NASA Image and Video Library

2008-06-23

CAPE CANAVERAL, Fla. – A Senate field hearing held at the Canaveral Port Authority and chaired by Florida Sen. Bill Nelson (third from right on the dais) focuses on workforce related challenges at NASA's Kennedy Space Center and potential solutions to mitigate the transition's effects on the community. The hearing examined issues surrounding the retirement of the space shuttle and the transition to the new Orion/Ares system. At the table representing NASA are Deputy Associate Administrator of Exploration Systems Doug Cooke, Administrator Michael Griffin and Associate Administrator of Space Operations William Gerstenmaier. Photo credit: NASA/Kim Shiflett

Installation Restoration Program Records Search for McChord Air Force Base, Washington.

DTIC Science & Technology

1982-08-01

responsible for smoke testing for possi- ble outlets. g ŕ 115 0 V -j q * REFERENCES * .4 g SI * I w I WI j EU REFERENCES Brandin , R. M., and S. Sgt. S. A...Ms. R. Brandin . Griffin, W. C., et al. 1962. Water Resources of the Tacoma Area Washington. Geological Survey Water Supply Paper 1499-B. Prepared in...MEMBERS vS U STEVEN R. HOFFMAN Education B.S., Civil Engineering, South Dakota School of Mines and Technology, 1971 Experience - -. Mr. Hoffman is a

Multiscalar approach to archaeological site formation at GaJj17, East Turkana, Kenya

NASA Astrophysics Data System (ADS)

Murray, B. M.; Ranhorn, K. L.; Colarossi, D.; Mavuso, S. S.; Dogandžić, T.; Ziegler, M. J.; Warren, S. L.; Braun, D. R.; Harris, J. W. K.

2017-12-01

Kenya's East Turkana region hosts a rich Plio­Pleistocene record of fossils, archaeological artifacts, and sedimentary features whose chronostratigraphic histories are often obscured by landscape changes from erosional events and tectonic activity. The Middle Stone Age (MSA) record of the Koobi Fora Formation (KF Fm.) has particularly been subjected to this complex depositional history, making it a sparse unit and, consequently, widely understudied. Stratigraphically located in between the maximum capping unconformity of the KF Fm.'s Chari tuff ( 1.39 Ma) and that of the Galana Boi Fm. ( 10 ka), the unit provides a unique window into understanding the Late Pleistocene of the region. The MSA surface scatters at archaeological site GaJj17 prompted further study into the site's age and depositional chronology. The GaJj17 ridge is locally distinguished by its cap of Late Pleistocene sands overlying strata containing tuffs likely of the Upper Burgi (2.0­-1.87 Ma) or KBS (1.87­-1.56 Ma) members. To investigate whether GaJj17's preservation is due to tectonic deformation, a broader scale examination of the structural geology was conducted through surveys and aerial imagery. Regions of deformation were identified and mapped to establish the geological history of the locality. Resultant observations and elevation data offer insight into regional faults at the root of prolonged structural alterations which have facilitated the unique preservation of MSA materials. Through a multiscalar approach it is possible to understand both the formation of GaJj17 and the underlying processes behind preservation and destruction in the changing landscape of the Turkana basin, enabling future identification of archaeological sites through proxies of elevation, regional stratigraphy, and fault mapping. This research was supported by IRES grants 1358178 and 1358200 from the U.S. National Science Foundation.

Mount Rainier National Park and Olympic National Park elk monitoring program annual report 2011

USGS Publications Warehouse

Happe, Patricia J.; Reid, Mason; Griffin, Paul C.; Jenkins, Kurt J.; Vales, David J.; Moeller, Barbara J.; Tirhi, Michelle; McCorquodale, Scott

2013-01-01

Fiscal year 2011 was the first year of implementing an approved elk monitoring protocol in Mount Rainier (MORA) and Olympic (OLYM) National Parks in the North Coast and Cascades Network (NCCN) (Griffin et al. 2012). However, it was the fourth and second year of gathering data according to protocol in MORA and OLYM respectively; data gathered during the protocol development phase followed procedures that are laid out in the protocol. Elk monitoring in these large wilderness parks relies on aerial surveys from a helicopter. Summer surveys are intended to provide quantitative estimates of abundance, sex and age composition, and distribution of migratory elk in high elevation trend count areas. An unknown number of elk is not detected during surveys; however the protocol estimates the number of missed elk by applying a model that accounts for detection bias. Detection bias in elk surveys in MORA is estimated using a double-observer sightability model that was developed using survey data from 2008-2010 (Griffin et al. 2012). That model was developed using elk that were previously equipped with radio collars by cooperating tribes. At the onset of protocol development in OLYM there were no existing radio-collars on elk. Consequently the majority of the effort in OLYM in the past 4 years has been focused on capturing and radio-collaring elk and conducting sightability trials needed to develop a double-observer sightability model in OLYM. In this annual report we provide estimates of abundance and composition for MORA elk, raw counts of elk made in OLYM, and describe sightability trials conducted in OLYM. At MORA the North trend count area was surveyed twice and the South once (North Rainier herd, and South Rainier herd). We counted 373 and 267 elk during two replicate surveys of the North Rainier herd, and 535 elk in the South Rainier herd. Using the model, we estimated that 413 and 320 elk were in the North and 652 elk were in the South trend count areas during the time of the respective surveys. At OLYM, the Core and Northwest trend count areas were completely surveyed, as were portions of the Quinault. In addition, we surveyed 10 survey units specifically to get resight data. Two-hundred and forty eight elk were counted in the Core, 19 in the Northwest, and 169 in the Quinault. We conducted double-observer sightability trials associated with 14 collared elk groups for use in developing the double-observer sightability model for OLYM.

Geochemical, modal, and geochronologic data for 1.4 Ga A-type granitoid intrusions of the conterminous United States

USGS Publications Warehouse

du Bray, Edward A.; Holm-Denoma, Christopher S.; San Juan, Carma A.; Lund, Karen; Premo, Wayne R.; DeWitt, Ed

2015-08-10

In addition, Kisvarsanyi (1972) suggests that iron-copper deposits in the St. Francois Mountains of southeastern Missouri are petrogenetically associated with 1.4 Ga A-type granitoids that occur in that region. Similarly, Dall’Agnol and others (2012) summarize important global associations between A-type granitoid rocks and a variety of important ore deposit types, particularly tin, high-field-strength elements (Zr, Hf, Nb, Ta), rare-earth elements, and iron oxide-copper-gold deposits. Consequently, the need to better understand relations between A-type granitoid rocks, tectonic setting, and magma petrogenesis, as well as their genetic associations with important types of ore deposits, suggests that developing a definitive geochemical, modal, and geochronologic database for these rocks in the conterminous United States is of considerable value.

Synthesis, characterization and biological evaluation of a (67)Ga-labeled (η(6)-Tyr)Ru(η(5)-Cp) peptide complex with the HAV motif.

PubMed

Bihari, Zsolt; Vultos, Filipe; Fernandes, Célia; Gano, Lurdes; Santos, Isabel; Correia, João D G; Buglyó, Péter

2016-07-01

Heterobimetallic complexes with the evolutionary, well-preserved, histidyl-alanyl-valinyl (HAV) sequence for cadherin targeting, an organometallic Ru core with anticancer activity and a radioactive moiety for imaging may hold potential as theranostic agents for cancer. Visible-light irradiation of the HAVAY-NH2 pentapeptide in the presence of [(η(5)-Cp)Ru(η(6)-naphthalene)](+) resulted in the formation of a full sandwich type complex, (η(6)-Tyr-RuCp)-HAVAY-NH2 in aqueous solution, where the metal ion is connected to the Tyr (Y) unit of the peptide. Conjugation of this complex to 2,2'-(7-(1-carboxy-4-((4-isothiocyanatobenzyl)amino)-4-oxobutyl)-1,4,7-triazonane-1,4-diyl)diacetic acid (NODA-GA) and subsequent metalation of the resulting product with stable ((nat)Ga) and radioactive ((67)Ga) isotope yielded (nat)Ga/(67)Ga-NODA-GA-[(η(6)-Tyr-RuCp)-HAVAY-NH2]. The non-radioactive compounds were characterized by NMR spectroscopy and Mass Spectrometry. The cellular uptake and cytotoxicity of the radioactive and non-radioactive complexes, respectively, were evaluated in various human cancer cell lines characterized by different levels of N- or E-cadherins expression. Results from these studies indicate moderate cellular uptake of the radioactive complexes. However, the inhibition of the cell proliferation was not relevant. Copyright © 2016 Elsevier Inc. All rights reserved.

A controllable robust multiferroic GaTeCl monolayer with colossal 2D ferroelectricity and desirable multifunctionality.

PubMed

Zhang, Shi-Hao; Liu, Bang-Gui

2018-03-29

We propose through first-principles investigation that the GaTeCl monolayer is an excellent two-dimensional (2D) multiferroic with giant mechanical anisotropy. The calculated phonon spectrum, molecular dynamic simulations, and elastic moduli confirm its dynamic and mechanical stability, and our cleavage energy analysis shows that exfoliating one GaTeCl monolayer from the existing GaTeCl bulk is feasible. The calculated in-plane ferroelectric polarization reaches 578 pC m-1. The energy barriers per formula unit of the ferroelastic 90° rotational and ferroelectric reversal transitions are 476 meV and 754 meV, respectively, being the greatest in the 2D multiferroics family so far. Importantly, on the other hand, a tensile stress of 4.7 N m-1 perpendicular to the polarization can drive the polarization to rotate by 90°. These can make the GaTeCl monolayer have not only robust ferroelasticity and ferroelectricity but also easy mechanical controllability. Furthermore, the GaTeCl monolayer has giant piezoelectricity and optical second harmonic generation, especially in the range of visible light, and a tensile stress of 0.3 N m-1 along the polarization can make the indirect gap transit to the direct gap. These interesting mechanical, electronic, and optical properties of the GaTeCl monolayer show its great potential in high-performance multi-functional applications.

Low Temperature Noise Measurement of an InAs/GaSb-based nBn MWIR Detector

DTIC Science & Technology

2011-01-01

Measurement of an InAs/GaSb-based nBn MWIR Detector 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR( S ) 5d. PROJECT NUMBER...5e. TASK NUMBER 5f. WORK UNIT NUMBER 7. PERFORMING ORGANIZATION NAME( S ) AND ADDRESS(ES) Air Force Research Laboratory,Space Vehicles Directorate...3550 Aberdeen Ave SE,Kirtland AFB,NM,87117 8. PERFORMING ORGANIZATION REPORT NUMBER 9. SPONSORING/MONITORING AGENCY NAME( S ) AND ADDRESS(ES) 10

Structural and optical properties of (Ag,Cu)(In,Ga)Se{sub 2} polycrystalline thin film alloys

DOE Office of Scientific and Technical Information (OSTI.GOV)

Boyle, J. H.; Shafarman, W. N.; Birkmire, R. W.

2014-06-14

The structural and optical properties of pentenary alloy (Ag,Cu)(In,Ga)Se{sub 2} polycrystalline thin films were characterized over the entire compositional range at a fixed (Cu + Ag)/(In + Ga) ratio. Films deposited at 550 °C on bare and molybdenum coated soda-lime glass by elemental co-evaporation in a single-stage process with constant incident fluxes exhibit single phase chalcopyrite structure, corresponding to 122 spacegroup (I-42d) over the entire compositional space. Unit cell refinement of the diffraction patterns show that increasing Ag substitution for Cu, the refined a{sub o} lattice constant, (Ag,Cu)-Se bond length, and anion displacement increase in accordance with the theoretical model proposed by Jaffe, Wei, andmore » Zunger. However, the refined c{sub o} lattice constant and (In,Ga)-Se bond length deviated from theoretical expectations for films with mid-range Ag and Ga compositions and are attributed to influences from crystallographic bond chain ordering or cation electronegativity. The optical band gap, derived from transmission and reflection measurements, widened with increasing Ag and Ga content, due to influences from anion displacement and cation electronegativity, as expected from theoretical considerations for pseudo-binary chalcopyrite compounds.« less

Investigations on the electronic, structural, magnetic properties related to shape-memory behavior in Ti{sub 2}CoX (X=Al, Ga, In)

DOE Office of Scientific and Technical Information (OSTI.GOV)

Wei, Xiao-Ping, E-mail: weixp2008@gmail.com; Chu, Yan-Dong; Sun, Xiao-Wei

2015-02-15

Highlights: • The analysis of phase stability trend is studied for Ti{sub 2}CoX(X = Al, Ga, In). • Ti{sub 2}CoGa is more suitable as shape memory alloy. • Total magnetic moments disappear with a increase of c/a ratio for all systems. • Density of states at the Fermi level are also shown. - Abstract: Using the full-potential local orbital minimum-basis method, we have performed a systematic investigations on the electronic, structural, and magnetic properties related to shape memory applications for Ti{sub 2}CoX (X=Al, Ga, In) alloys. Our results confirm that these alloys are half-metallic ferromagnets with total magnetic moment ofmore » 2μ{sub B} per formula unit in austenite phase, and undergo a martensitic transformation at low temperatures. The relative stabilities of the martensitic phases differ considerably between Ti{sub 2}CoX (X=Al, Ga, In). Details of the electronic structures suggest that the differences in hybridizations between the magnetic components are responsible for trends of phase. Quantitative estimates for the energetics and the magnetizations indicate that Ti{sub 2}CoGa is a promising candidate for shape memory applications.« less

[Electroacupuncture intervention combined with general anesthesia for 80 cases of heart valve replacement surgery under cardiopulmonary bypass].

PubMed

Chi, Hao; Zhou, Wen-Xiong; Wu, Yao-Yao; Chen, Tong-Yu; Ge, Wen; Yuan, Lan; Shen, Wei-Dong; Zhou, Jia

2014-02-01

To determine whether electroacupuncture (EA) intervention combined with general anesthesia (GA) strategy can reduce early post-operative morbidity and medical costs in patients undergoing heart valve replacement operation under cardiopulmonary bypass. A total of 160 heart valve replacement surgery patients undergoing cardiopulmonary bypass were randomly divided into GA and EA + GA groups (n = 80 in each group). Patients of the GA group were given with intravenous injection of Fentanyl, Midazolam, Vecuronium Bromide, etc. and routine tracheal intubation. EA (3-4 Hz, 2.0-2.2 mA) was applied to bilateral Zhongfu (LU 1), Chize (LU 5) and Ximen (PC 4) beginning about 20 mm before the surgery in the EA + GA group. Endotracheal intubation was not employed but only prepared as a standby for patients of the EA + GA group. The dosage of narcotic drugs, duration of surgery, duration of aertic blockage, rate of cardiac re-beating, volumes of post-operative blood transfusion, discharge volume, cases of post-operative pulmonary infection, vocal cord injury, and the time of first bed-off, first eating and duration in intensive care unit (IOU) residence. etc. were recorded. The successful rates of heart valve replacement surgery were similar in both GA and EA + GA groups. Compared with the GA group, the dosages of Fentanyl, Midazolam and Vecuronium of the EA + GA group were significantly lower (P < 0.05, P < 0.01), the numbers of patients needing blood-transfusion, antibiotics treatment, and suffering from pulmonary infection were fewer, the time of first bed-off and duration of hospitalizetion and IOU residence were considerably shorter (P < 0.05, P < 0.01) and the total medical cost was obviously lower (P < 0.05) in the EA + GA group. EA combined with general anesthesia strategy for heart valve replacement surgery without endotracheal intubation is safe and can reduce post-operative morbidity and medical costs in patients undergoing heart valve replacement surgery under cardiopulmonary bypass.

Pre- or postoperative interscalene block and/or general anesthesia for arthroscopic shoulder surgery: a retrospective observational study.

PubMed

Bosco, Laura; Zhou, Cheng; Murdoch, John A C; Bicknell, Ryan; Hopman, Wilma M; Phelan, Rachel; Shyam, Vidur

2017-10-01

Arthroscopic shoulder surgery can be performed with an interscalene brachial plexus block (ISBPB) alone, ISBPB combined with general anesthesia (GA), or GA alone. Postoperative pain is typically managed with opioids; however, both GA and opioids have adverse effects which can delay discharge. This retrospective study compares the efficacy of four methods of anesthesia management for arthroscopic shoulder surgery. Charts of all patients who underwent shoulder surgery by a single surgeon from 2012-2015 were categorized by analgesic regimen: GA only (n = 177), single-shot ISBPB only (n = 124), or pre- vs postoperative ISBPB combined with GA (ISBPB + GA [n = 72] vs GA + ISBPB [n = 52], respectively). The primary outcome measure was the time to discharge from the postanesthesia care unit (PACU). Mean (SD) time in the PACU ranged from 70.5 (39.9) min for ISBPB only to 111.2 (56.9) min for GA only. Use of ISBPB in any combination and regardless of timing resulted in significantly reduced PACU time, with a mean drop of 27.2 min (95% confidence interval [CI], 17.3 to 37.2; P < 0.001). The largest mean pairwise difference was between GA only and ISBPB only, with a mean difference of 40.7 min (95% CI, 25.5 to 55.8; P < 0.001). Use of ISBPB also reduced pain upon arrival at the PACU and, in some cases, upon discharge from the PACU (i.e., ISBPB only but not ISBPB + GA compared with GA). An ISBPB (alone or prior to GA) also reduced analgesic requirements. Previously reported benefits of an ISBPB for arthroscopic shoulder surgery are confirmed. Postoperative ISBPBs may also be beneficial for reducing pain and opioid requirements and could be targeted for patients in severe pain upon emergence. A sufficiently powered randomized-controlled trial could determine the relative efficacy, safety, and associated financial implications associated with each method.

Noncentrosymmetric rare-earth copper gallium chalcogenides RE3CuGaCh7 (RE=La-Nd; Ch=S, Se): An unexpected combination

NASA Astrophysics Data System (ADS)

Iyer, Abishek K.; Rudyk, Brent W.; Lin, Xinsong; Singh, Harpreet; Sharma, Arzoo Z.; Wiebe, Christopher R.; Mar, Arthur

2015-09-01

The quaternary rare-earth chalcogenides RE3CuGaS7 and RE3CuGaSe7 (RE=La-Nd) have been prepared by reactions of the elements at 1050 °C and 900 °C, respectively. They crystallize in the noncentrosymmetric La3CuSiS7-type structure (hexagonal, space group P63, Z=2) in which the a-parameter is largely controlled by the RE component (a=10.0-10.3 Å for the sulfides and 10.3-10.6 Å for the selenides) whereas the c-parameter is essentially fixed by the choice of Ga and chalcogen atoms within tetrahedral units (c=6.1 Å for the sulfides and 6.4 Å for the selenides). They extend the series RE3MGaCh7, previously known for divalent metal atoms (M=Mn-Ni), differing in that the Cu atoms in RE3CuGaCh7 occupy trigonal planar sites instead of octahedral sites. Among quaternary chalcogenides RE3MM‧Ch7, the combination of monovalent (M=Cu) and trivalent (M‧=Ga) metals is unusual because it appears to violate the condition of charge balance satisfied by most La3CuSiS7-type compounds. The possibility of divalent Cu atoms was ruled out by bond valence sum analysis, magnetic measurements, and X-ray photoelectron spectroscopy. The electron deficiency in RE3CuGaCh7 is accommodated through S-based holes at the top of the valence band, as shown by band structure calculations on La3CuGaS7. An optical band gap of about 2.0 eV was found for La3CuGaSe7.

Wide band gap Ga2O3 as efficient UV-C photocatalyst for gas-phase degradation applications.

PubMed

Jędrzejczyk, Marcin; Zbudniewek, Klaudia; Rynkowski, Jacek; Keller, Valérie; Grams, Jacek; Ruppert, Agnieszka M; Keller, Nicolas

2017-12-01

α, β, γ, and δ polymorphs of 4.6-4.8 eV wide band gap Ga 2 O 3 photocatalysts were prepared via a soft chemistry route. Their photocatalytic activity under 254 nm UV-C light in the degradation of gaseous toluene was strongly depending on the polymorph phase. α- and β-Ga 2 O 3 photocatalysts enabled achieving high and stable conversions of toluene with selectivities to CO 2 within the 50-90% range, by contrast to conventional TiO 2 photocatalysts that fully deactivate very rapidly on stream in similar operating conditions with rather no CO 2 production, no matter whether UV-A or UV-C light was used. The highest performances were achieved on the high specific surface area β-Ga 2 O 3 photocatalyst synthesized by adding polyethylene glycol (PEG) as porogen before precipitation, with stable toluene conversion and mineralization rate into CO 2 strongly overcoming those obtained on commercial β-Ga 2 O 3 . They were attributed to favorable physicochemical properties in terms of high specific surface area, small mean crystallite size, good crystallinity, high pore volume with large size mesopore distribution and appropriate surface acidity, and to the possible existence of a double local internal field within Ga 3+ units. In the degradation of hydrogen sulfide, PEG-derived β-Ga 2 O 3 takes advantage from its high specific surface area for storing sulfate, and thus for increasing its resistance to deactivation and the duration at total sulfur removal when compared to other β-Ga 2 O 3 photocatalysts. So, we illustrated the interest of using high surface area β-Ga 2 O 3 in environmental photocatalysis for gas-phase depollution applications.

Treatment outcomes of using inhalation sedation for comprehensive dental care.

PubMed

Madouh, M; BaniHani, A; Tahmassebi, J F

2018-02-01

To assess the outcomes of dental treatment under inhalation sedation within a UK specialist hospital setting. This was a retrospective cohort study of the case notes of patients under 17 years of age who received dental treatment using inhalation sedation at a UK specialist setting during the period 2006-2011. Treatment outcomes were categorised into five groups: (1) treatment completed as planned, (2) modified treatment completed, (3) treatment abandoned in sedation unit and patient referred for treatment under general analgesia (GA), (4) treatment abandoned in sedation unit and patient referred for treatment under local analgesia (LA), (5) child failed to return to complete treatment. In total, the case notes of 453 patients were evaluated. The mean age of the patients was 10.3 ± 2.9 years. Treatment was completed successfully in 63.6% of the cases, 15.9% were referred for treatment under GA, 11.2% failed to return to complete the treatment, 7.1% received modified treatment completed, and only 2.2% were referred for treatment under LA. Treatment outcomes were significantly associated with patient`s age (p = 0.002). The treatment outcome "treatment abandoned and child referred to be treated under GA" had significantly lower mean patient ages than the other outcomes. The majority of children referred for inhalation sedation, completed their course of treatment. A significantly higher proportion of those in the younger age group required GA to complete their treatment.

Project ASPIRE: Incorporating Integrative Medicine Into Residency Training

PubMed Central

Nawaz, Haq; Via, Christina M.; Ali, Ather; Rosenberger, Lisa D.

2016-01-01

Griffin Hospital, a community hospital affiliated with Yale School of Public Health and Yale School of Medicine, received Health Resources and Services Administration funding to strengthen and improve its combined internal medicine and general preventive medicine residency program by incorporating an integrative medicine curriculum. The purpose of project ASPIRE (Advancing Skills of Preventive medicine residents through Integrative medicine Education, Research and Evaluation) was to create, implement, and evaluate a needs-based, innovative training curriculum in integrative medicine. Through this robust new training, the authors aimed to produce preventive medicine-trained physicians with competencies in integrative medicine to collaboratively work with other integrative medicine practitioners in interdisciplinary teams to provide holistic, patient-centered care. The multifaceted collaborative curriculum was composed of didactics, grand rounds, journal club, objective structured clinical examinations, and two new practicum rotations in integrative medicine. The new practicum rotations included block rotations at the Integrative Medicine Center at Griffin Hospital and the Yale Stress Center. Between 2012 and 2014, three cohorts participated in the curriculum; two of these cohorts included three advanced preventive medicine residents each and the fourth included four residents. Project faculty conducted 14 lectures and journal clubs, and two grand rounds. Six of the ten participating residents (60%) completed integrative medicine clinical rotations. Residents’ attitudes toward integrative medicine were evaluated through self-assessment using the Complementary, Alternative, and Integrative Medicine Attitudes Questionnaire; data were analyzed in 2015. This article describes the results of this prospective observational study based on single-institution experience over the course of the 2-year project period. PMID:26477907

Novel AlInN/GaN integrated circuits operating up to 500 °C

NASA Astrophysics Data System (ADS)

Gaska, R.; Gaevski, M.; Jain, R.; Deng, J.; Islam, M.; Simin, G.; Shur, M.

2015-11-01

High electron concentration in 2DEG channel of AlInN/GaN devices is remarkably stable over a broad temperature range, enabling device operation above 500 °C. The developed IC technology is based on three key elements: (1) exceptional quality AlInN/GaN heterostructure with very high carrier concentration and mobility enables IC fast operation in a broad temperature range; (2) heterostructure field effect transistor approach t provides fully planar IC structure which is easy to scale and to combine with the other high temperature electronic components; (3) fabrication advancements including novel metallization scheme and high-K passivation/gate dielectrics enable high temperature operation. The feasibility of the developed technology was confirmed by fabrication and testing of the high temperature inverter and differential amplifier ICs using AlInN/GaN heterostructures. The developed ICs showed stable performance with unit-gain bandwidth above 1 MHz and internal response time 45 ns at temperatures as high as 500 °C.

Three-dimensional Aerographite-GaN hybrid networks: Single step fabrication of porous and mechanically flexible materials for multifunctional applications

PubMed Central

Schuchardt, Arnim; Braniste, Tudor; Mishra, Yogendra K.; Deng, Mao; Mecklenburg, Matthias; Stevens-Kalceff, Marion A.; Raevschi, Simion; Schulte, Karl; Kienle, Lorenz; Adelung, Rainer; Tiginyanu, Ion

2015-01-01

Three dimensional (3D) elastic hybrid networks built from interconnected nano- and microstructure building units, in the form of semiconducting-carbonaceous materials, are potential candidates for advanced technological applications. However, fabrication of these 3D hybrid networks by simple and versatile methods is a challenging task due to the involvement of complex and multiple synthesis processes. In this paper, we demonstrate the growth of Aerographite-GaN 3D hybrid networks using ultralight and extremely porous carbon based Aerographite material as templates by a single step hydride vapor phase epitaxy process. The GaN nano- and microstructures grow on the surface of Aerographite tubes and follow the network architecture of the Aerographite template without agglomeration. The synthesized 3D networks are integrated with the properties from both, i.e., nanoscale GaN structures and Aerographite in the form of flexible and semiconducting composites which could be exploited as next generation materials for electronic, photonic, and sensors applications. PMID:25744694

Acute Responses to Diuretic Therapy in Extremely Low Gestational Age Newborns: Results from the Prematurity and Respiratory Outcomes Program Cohort Study.

PubMed

Blaisdell, Carol J; Troendle, James; Zajicek, Anne

2018-06-01

To determine if daily respiratory status improved more in extremely low gestational age (GA) premature infants after diuretic exposure compared with those not exposed in modern neonatal intensive care units. The Prematurity and Respiratory Outcomes Program (PROP) was a multicenter observational cohort study of 835 extremely premature infants, GAs of 23 0/7 -28 6/7 weeks, enrolled in the first week of life from 13 US tertiary neonatal intensive care units. We analyzed the PROP study daily medication and respiratory support records of infants ≤34 weeks postmenstrual age. We determined whether there was a temporal association between the administration of diuretics and an acute change in respiratory status in premature infants in the neonatal intensive care unit, using an ordered categorical ranking of respiratory status. Infants in the diuretic exposed group of PROP were of lower mean GA and lower mean birth weight (P < .0001). Compared with infants unexposed to diuretics, the probability (adjusted for infant characteristics including GA, birth weight, sex, and respiratory status before receiving diuretics) that the exposed infants were on a higher level of respiratory support was significantly greater (OR, >1) for each day after the initial day of diuretic exposure. Our analysis did not support the ability of diuretics to substantially improve the extremely premature infant's respiratory status. Further study of both safety and efficacy of diuretics in this setting are warranted. Clinicaltrials.gov: NCT01435187. Published by Elsevier Inc.

Deducing the ancestry of terranes: SHRIMP evidence for South America derived Gondwana fragments in central Europe

NASA Astrophysics Data System (ADS)

Friedl, Gertrude; Finger, Fritz; McNaughton, Neal J.; Fletcher, Ian R.

2000-11-01

We present here an example of how the sensitive high-resolution ion microprobe (SHRIMP) zircon dating method can provide a terrane-specific geochronological fingerprint for a rock and thus help to reveal major tectonic boundaries within orogens. This method, applied to inherited zircons in a ca. 580 Ma metagranitoid rock from the eastern Bohemian Massif, has provided, for the first time in the central European Variscan basement, unequivocal evidence for Mesoproterozoic and late Paleoproterozoic geologic events ca. 1.2 Ga, 1.5 Ga, and 1.65 1.8 Ga. The recognition of such zircon ages has important consequences because it implies that parts of the Precambrian section of Variscan central Europe were originally derived from a Grenvillian cratonic province, as opposed to the common assumption of an African connection. A comparison with previously published SHRIMP data suggests, however, that these Mesoproterozoic and late Paleoproterozoic zircon ages may be restricted to the Moravo-Silesian unit in the eastern Variscides, whereas the Saxothuringian and Moldanubian zones appear to contain a typical north African (i.e., Neoproterozoic plus Eburnian) inherited-zircon age spectrum. This finding supports new tectonic concepts, according to which Variscan Europe is composed of a number of completely unrelated terranes with extremely different paleogeographic origins. The Moravo-Silesian unit can be best interpreted as a peri-Gondwana terrane, which was situated in the realm of the Amazonian cratonic province by the late Precambrian, comparable to the Avalonian terranes of North America and the United Kingdom.

Letter from Galo Jackson, USEPA to Prashant Gupta, Honeywell. Subject: EPA'S Approval of the February 2013 Revision of the Remedial Investigation Report for the Uplands, Operable Unit 3

EPA Pesticide Factsheets

Feb. 26, 2013 letter to notify Honeywell International about approval of the 2013 Revision of the Remedial Investigation Report for the Uplands, Operable Unit 3 at the LCP Chemicals Superfund Site, GA. Region ID: 04 DocID: 10925566, DocDate: 02-26-2013

DOE Office of Scientific and Technical Information (OSTI.GOV)

Karayigit, A.I.; Bulut, Y.; Karayigit, G.

A total of 48 samples, feed coals (FCs), fly ashes (FAs) and bottom ashes (BAs), which were systematically collected once a week over an eight-week period from boiler units, B1-4 with 660 MW and B5-6 with 330 MW capacity from Soma power plant, have been evaluated for major and trace elements (Al, Ca, Fe, K, Mg, Mn, Na, Ti, S, As, B, Ba, Be, Bi, Cd, Co, Cr, Cu, Cs, Ga, Ge, Hf, Hg, Li, Mo, Nb, Ni, P, Pb, Rb, Sb, Sc, Se, Sn, Sr, Ta, Th, Tl, U, V, Y, Zn, Zr, and REEs) to get information onmore » behavior during coal combustion. This study indicates that some elements such as Hg, Bi, Cd, As, Pb, Ge, Tl, Sn, Zn, Sb, B show enrichments in FAs relative to the BAs in both group boiler units. In addition to these, Cs, Lu, Tm, and Ga in Units B1-4 and S in Units B5-6 also have enrichments in FAs. Elements showing enrichments in BAs in both group boiler units are Ta, Mn, Nb. In addition to these, Se, Ca, Mg, Na, Fe in Units B1-4 and Cu in Units B5-6 also have enrichments in BAs. The remaining elements investigated in this study have no clear segregation between FAs and BAs. Mass balance calculations with the two methods show that some elements, S, Ta, Hg, Se, Zn, Na, Ca in Units B1-4, and Hg, S, Ta, Se, P in Units B5-6, have volatile behavior during coal combustion in the Soma power plant. This study also implies that some elements, Sb and Tb in Units B1-4 and Sb in Units B5-6, have relatively high retention effects in the combustion residues from the Soma power plant.« less

Gibberellin Produced in the Cotyledon Is Required for Cell Division during Tissue Reunion in the Cortex of Cut Cucumber and Tomato Hypocotyls1

PubMed Central

Asahina, Masashi; Iwai, Hiroaki; Kikuchi, Akira; Yamaguchi, Shinjiro; Kamiya, Yuji; Kamada, Hiroshi; Satoh, Shinobu

2002-01-01

Cucumber (Cucumis sativus) hypocotyls were cut to one-half of their diameter transversely, and morphological and histochemical analyses of the process of tissue reunion in the cortex were performed. Cell division in the cortex commenced 3 d after cutting, and the cortex was nearly fully united within 7 d. 4′,6-Diamidino-2-phenylindole staining and 5-bromo-2′-deoxyuridine labeling experiments indicate that nDNA synthesis occurred during this process. In addition, specific accumulation of pectic substances was observed in the cell wall of attached cells in the reunion region of the cortex. Cell division during tissue reunion was strongly inhibited when the cotyledon was removed. This inhibition was reversed by applying gibberellin (GA, 10−4 m GA3) to the apical tip of the cotyledon-less plant. Supporting this observation, cell division in the cortex was inhibited by treatment of the cotyledon with 10−4 m uniconazole-P (an inhibitor of GA biosynthesis), and this inhibition was also reversed by simultaneous application of GA. In contrast to the essential role of cotyledon, normal tissue reunion in cut hypocotyls was still observed when the shoot apex was removed. The requirement of GA for tissue reunion in cut hypocotyls was also evident in the GA-deficient gib-1 mutant of tomato (Lycopersicon esculentum). Our results suggest that GA, possibly produced in cotyledons, is essential for cell division in reuniting cortex of cut hypocotyls. PMID:12011351

Synthesis, structural, electronic and linear electro-optical features of new quaternary Ag2Ga2SiS6 compound

NASA Astrophysics Data System (ADS)

Piasecki, M.; Myronchuk, G. L.; Parasyuk, O. V.; Khyzhun, O. Y.; Fedorchuk, A. O.; Pavlyuk, V. V.; Kozer, V. R.; Sachanyuk, V. P.; El-Naggar, A. M.; Albassam, A. A.; Jedryka, J.; Kityk, I. V.

2017-02-01

For the first time phase equilibria and phase diagram of the AgGaS2-SiS2 system were successfully explored by differential thermal and X-ray phase analysis methods. Crystal structure of low-temperature (LT) modification of Ag2Ga2SiS6 (LT- Ag2Ga2SiS6) was studied by X-ray powder method and it belongs to tetragonal space group I-42d, with unit cell parameters a=5.7164(4) Å, c=9.8023(7) Å, V=320.32(7) Å3. Additional details regarding the crystal structure exploration are available at the web page Fachinformationszentrum Karlsruhe. X-ray photoelectron core-level and valence-band spectra were measured for pristine LT- Ag2Ga2SiS6 crystal surface. In addition, the X-ray photoelectron valence-band spectrum of LT-Ag2Ga2SiS6 was matched on a common energy scale with the X-ray emission S Kβ1,3 and Ga Kβ2 bands, which give information on the energy distribution of the S 3p and Ga 4p states, respectively. The presented X-ray spectroscopy results indicate that the valence S p and Ga p atomic states contribute mainly to the upper and central parts of the valence band of LT-Ag2Ga2SiS6, respectively, with a less significant contribution also to other valence-band regions. Band gap energy was estimated by measuring the quantum energy in the spectral range of the fundamental absorption. We have found that energy gap Eg is equal to 2.35 eV at 300 K. LT-Ag2Ga2SiS6 is a photosensitive material and reveals two spectral maxima on the curve of spectral photoconductivity spectra at λmax1 =590 nm and λmax2 =860 nm. Additionally, linear electro-optical effect of LT-Ag2Ga2SiS6 for the wavelengths of a cw He-Ne laser at 1150 nm was explored.

The half-metallicity of LiMgPdSn-type quaternary Heusler alloys FeMnScZ (Z=Al, Ga, In): A first-principle study

DOE Office of Scientific and Technical Information (OSTI.GOV)

Gao, Y. C., E-mail: gaoyc1963@126.com; Gao, X.

2015-05-15

Based on the first-principles calculations, quaternary Heusler alloys FeMnScZ (Z=Al, Ga, In) including its phase stability, band gap, the electronic structures and magnetic properties has been studied systematically. We have found that, in terms of the equilibrium lattice constants, FeMnScZ (Z=Al, Ga, In) are half-metallic ferrimagnets, which can sustain the high spin polarization under a very large amount of lattice distortions. The half-metallic band gap in FeMnScZ (Z=Al, Ga, In) alloys originates from the t{sub 1u}-t{sub 2g} splitting instead of the e{sub u}-t{sub 1u} splitting. The total magnetic moments are 3μB per unit cell for FeMnScZ (Z=Al, Ga, In) alloysmore » following the Slater–Pauling rule with the total number of valence electrons minus 18 rather than 24. According to the study, the conclusion can be drawn that all of these compounds which have a negative formation energy are possible to be synthesized experimentally.« less

The effect of ligand substituent on crystal packing: Structural and theoretical studies of two Ga(III) supramolecular compounds

NASA Astrophysics Data System (ADS)

Soleimannejad, Janet; Nazarnia, Esfandiar

2016-07-01

A new Ga(III) supramolecular compound (4,4‧-bipyH2)[Ga(hpydc)2]2·7H2O (2) (where H2hpydc = 4-hydroxy-pyridine-2,6-dicarboxylic acid and 4,4‧-bipy = 4,4‧-bipyridine) was synthesized using the proton transfer reaction. Compound 2 was structurally characterized using single crystal X-ray diffraction, and it was shown that its asymmetric unit consists of two independent anionic Ga(III) complexes, one fully protonated 4,4‧-bipyridine and seven uncoordinated water molecules. In order to understand the effect of pyridine OH substituent on supramolecular interactions and crystal packing, compound 2 was compared with (bipyH2)[Ga(pydc)2]·(H2pydc)·4H2O (1) (where H2pydc = pyridine-2,6-dicarboxylic acid), that does not have an OH group on the pyridine ligand. The Density Functional Theory (DFT) and Natural Bond Orbital (NBO) calculations and also Atoms in Molecules (AIM) analysis were used to analyze the non-covalent interactions in both complexes. The calculation of non-covalent interactions' energy provides a useful means to investigate their effects in the crystal packing.

X-ray powder diffraction, spectroscopic study, dielectric properties and thermal analysis of new doped compound TiGa0.67Te2.33O8

NASA Astrophysics Data System (ADS)

Smaoui, S.; Ben Aribia, W.; Kabadou, A.; Abdelmouleh, M.

2017-04-01

A novel mixed valence tellurium oxide, TiGa0.67Te2.33O8, was synthesized and its crystal structure determined using the X-ray powder diffraction technique. The obtained oxide was found to crystallize in a cubic unit-cell, Ia 3 bar space group, with the lattice parameter a = 10.9557(1) Å. Rietveld refinement of the structure led to ultimate confidence factors Rp = 7.63 and Rwp = 6.71. This structure was based on slabs containing groups of (Te/Ga)O4 joined by the metal cations Ti4+. The structure analysis showed a cation ordering of Te4+ and Te6+ yielding a TiGa2/3Te7/3O8 formula. The IR and RAMAN spectra confirmed the presence of the TiO6 and (Te/Ga)O4 groups. The dielectric anomalies observed at 500 K were attributed to the mixed valence structure, arising from the mixed-valence Te6+/Te4+. We detected only one peak in thermal behavior by the DTA/TG analysis; which implied a melting reaction.

The southwestern extension of the Jiao-Liao-Ji belt in the North China Craton: Geochronological and geochemical evidence from the Wuhe Group in the Bengbu area

NASA Astrophysics Data System (ADS)

Liu, Chaohui; Zhao, Guochun; Liu, Fulai; Cai, Jia

2018-04-01

The Wuhe complex is located at the southeastern margin of the North China Craton. The complex consists of metamorphosed Paleoproterozoic potassic granitoids and supracrustal rocks, of which the latter include the Fengyang and Wuhe groups. Meta-mafic rocks from the lower Wuhe Group have igneous zircon U-Pb ages of 2126 ± 37 Ma with εHf(t) values of -6.22 to +8.38, and xenocrystic zircons of 2.39-2.36 Ga, 2.55-2.54 Ga and 2.77-2.69 Ga. Geochemically, the meta-mafic rocks can be classified into two groups. Group 1 island arc tholeiites display flat to slightly right declined REE patterns and moderately negative Nb, Ta, Zr, and Ti anomalies. Group 2 mature arc calcalkaline basalts display strongly fractionated chondrite-normalized REE patterns and evidently negative Nb, Ta and Ti anomalies. These meta-mafic rocks formed by partial melting of sub-arc depleted mantle wedge which had been modified by slab-derived melts at an active continental margin. Depositional age of the group can be constrained in the period of 2.16-2.10 Ga based on ages of the youngest detrital zircons and latter intrusions. U-Pb ages of detrital zircons yield major age peaks of 2.69 Ga and 2.52 Ga, with minor peaks at 2.88 Ga, 2.78 Ga, 2.35 Ga and 2.17 Ga, most of which are derived from the late Mesoarchean to early Paleoproterozoic granitoids in the Wuhe complex and the Jiaodong Terrane. Metamorphic zircons in the marbles coexisting with garnet amphibolites or granulites occur as either single grains or overgrowth (or recrystallization) rims surrounding magmatic zircon cores and yield ages of 1882 ± 19 Ma to 1844 ± 15 Ma. The comparable ca. 2.1 Ga potassic granites with A-type granite affinity, the ca. 2.1 Ga meta-mafic rocks with arc-like geochemical features, the 2.1-1.9 Ga meta-sedimentary units and the 1.9-1.8 Ga subduction- and collision-related granulite-facies metamorphism suggest that the Wuhe complex and the Jiao-Liao-Ji Belt share the same late Paleoproterozoic tectonic evolution process and the former is the southwestern extension of the latter.

Fine Structure of Trious and Excitons in Single GaAs Quantum Dots

DTIC Science & Technology

2002-08-30

RAPID COMMUNICATIONS PHYSICAL REVIEW B 66, 081310~R! ~2002!Fine structure of trions and excitons in single GaAs quantum dots J. G. Tischler, A. S ...fine structure of single localized excitons and trions. DOI: 10.1103/PhysRevB.66.081310 PACS number~ s !: 78.67.Hc, 73.21.2b, 71.35.2yAlthough the...AUTHOR( S ) 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER 7. PERFORMING ORGANIZATION NAME( S ) AND ADDRESS(ES) Naval Research Laboratory

Overexpression of GA20-OXIDASE1 impacts plant height, biomass allocation and saccharification efficiency in maize.

PubMed

Voorend, Wannes; Nelissen, Hilde; Vanholme, Ruben; De Vliegher, Alex; Van Breusegem, Frank; Boerjan, Wout; Roldán-Ruiz, Isabel; Muylle, Hilde; Inzé, Dirk

2016-03-01

Increased biomass yield and quality are of great importance for the improvement of feedstock for the biorefinery. For the production of bioethanol, both stem biomass yield and the conversion efficiency of the polysaccharides in the cell wall to fermentable sugars are of relevance. Increasing the endogenous levels of gibberellic acid (GA) by ectopic expression of GA20-OXIDASE1 (GA20-OX1), the rate-limiting step in GA biosynthesis, is known to affect cell division and cell expansion, resulting in larger plants and organs in several plant species. In this study, we examined biomass yield and quality traits of maize plants overexpressing GA20-OX1 (GA20-OX1). GA20-OX1 plants accumulated more vegetative biomass than control plants in greenhouse experiments, but not consistently over two years of field trials. The stems of these plants were longer but also more slender. Investigation of GA20-OX1 biomass quality using biochemical analyses showed the presence of more cellulose, lignin and cell wall residue. Cell wall analysis as well as expression analysis of lignin biosynthetic genes in developing stems revealed that cellulose and lignin were deposited earlier in development. Pretreatment of GA20-OX1 biomass with NaOH resulted in a higher saccharification efficiency per unit of dry weight, in agreement with the higher cellulose content. On the other hand, the cellulose-to-glucose conversion was slower upon HCl or hot-water pretreatment, presumably due to the higher lignin content. This study showed that biomass yield and quality traits can be interconnected, which is important for the development of future breeding strategies to improve lignocellulosic feedstock for bioethanol production. © 2015 The Authors. Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley & Sons Ltd.

Paleoproterozoic mojaveprovince in northwestern Mexico? Isotopic and U-Pb zircon geochronologic studies of precambrian and Cambrian crystalline and sedimentary rocks, Caborca, Sonora

USGS Publications Warehouse

Lang, Farmer G.; Bowring, S.A.; Matzel, J.; Maldonado, G.E.; Fedo, C.; Wooden, J.

2005-01-01

Whole-rock Nd isotopic data and U-Pb zircon geochronology from Precambrian crystalline rocks in the Caborca area, northern Sonora, reveal that these rocks are most likely a segment of the Paleoproterozoic Mojave province. Supporting this conclusion are the observations that paragneiss from the ??? 1.75 Ga Bamori Complex has a 2.4 Ga Nd model age and contains detrital zircons ranging in age from Paleo- proterozoic (1.75 Ga) to Archean (3.2 Ga). Paragneisses with similar age and isotopic characteristics occur in the Mojave province in southern California. In addition, "A-type" granite exposed at the southern end of Cerro Rajon has ca 2.0 Ga Nd model age and a U-Pb zircon age of 1.71 Ga, which are similar to those of Paleoproterozoic granites in the Mojave province. Unlike the U.S. Mojave province, the Caborcan crust contains ca. 1.1 Ga granite (Aibo Granite), which our new Nd isotopic data suggest is largely the product of anatexis of the local Precambrian basement. Detrital zircons from Neoproterozoic to early Cambrian miogeoclinal arenites at Caborca show dominant populations ca. 1.7 Ga, ca. 1.4 Ga, and ca. 1.1 Ga, with subordinate Early Cambrian and Archean zircons. These zircons were likely derived predominately from North American crust to the east and northeast, and not from the underlying Caborcan basement. The general age and isotopic similarities between Mojave province basement and overlying miogeoclinal sedimentary rocks in Sonora and southern California is necessary, but not sufficient, proof of the hypothesis that Sonoran crust is allochthonous and was transported to its current position during the Mesozoic along the proposed Mojave-Sonora megashear. One viable alternative model is that the Caborcan Precambrian crust is an isolated, autochthonous segment of Mojave province crust that shares a similar, but not identical, Proterozoic geological history with Mojave province crust found in the southwest United States ?? 2005 Geological Society of America.

Am I at Risk for Gestational Diabetes?

MedlinePlus

... sugar, such as insulin resistance, glucose intolerance, or “prediabetes”? Do you have high blood pressure, high cholesterol, ... National estimates and general information on diabetes and prediabetes in the United States, 2011. Atlanta, GA: U.S. ...

Teachers' Guide For Aviation Education.

ERIC Educational Resources Information Center

Aviation/Space, 1979

1979-01-01

This teacher's guide outlines the objectives, instructional procedures, student activities, and expected outcomes of an instructional unit on careers in aviation, designed for fifth and sixth grade students. It emphasizes aerospace activities and job opportunities in aviation. (GA)

Extensive Middle Amazonian mantling of debris aprons and plains in Deuteronilus Mensae, Mars: Implications for the record of mid-latitude glaciation

NASA Astrophysics Data System (ADS)

Baker, David M. H.; Head, James W.

2015-11-01

The mid-latitudes of Mars are host to a record of recent episodes of accumulations of ice-rich materials. The record includes debris aprons, interpreted to be debris-covered glaciers, that may represent the preserved remnants of a much more extensive ice sheet. We assessed the possibility of former glacial extents by examining debris aprons and the surrounding plains in Deuteronilus Mensae. Geomorphic units and stratigraphic relationships were mapped and documented from Mars Reconnaissance Orbiter (MRO) Context (CTX) and High Resolution Imaging Science Experiment (HiRISE) camera images, and crater retention ages were estimated from crater size-frequency distributions. Three major units are observed within the study area: debris aprons, lower plains, and upper plains. Debris aprons exhibit characteristics typical for these features documented elsewhere and in previous studies, including integrated flow lineations and patterns, convex-upward profiles, and knobby and brain terrain surface textures. A lower bound on the age for debris aprons is estimated to be 0.9 Ga. Debris aprons are superposed on a lower plains unit having a lower bound age of 3.3-3.5 Ga. A 50-100 m thick upper plains unit superposes both debris apron landforms and lower plains units and has a best-fit minimum age of 0.6 Ga. The upper plains unit exhibits characteristics of atmospherically-emplaced mantle material, including fine-grained nature, sublimation textures, cyclic layering, draping character, and widespread spatial distribution. Fracturing and subsequent sublimation/erosion of upper plains on debris aprons has contributed to many of the surface textures on debris aprons. The upper plains unit has also been eroded from the lower plains and plateaus, evidenced by isolated blocks of upper plains in the interiors of craters and on the walls and tops of plateaus. While no conclusive evidence diagnostic of former cold-based ice sheets are observed in the plains within the study region, such landforms and units may have been poorly developed or absent, as is often the case on Earth, and would have been covered and reworked by later mantling episodes. These observations suggest that emplacement of thick ice-rich mantle deposits extended at least to near the Early/Middle Amazonian boundary and overlapped with the waning stages of glaciation in Deuteronilus Mensae.

KSC-06pd0686

NASA Image and Video Library

2006-04-18

CINCINNATI, OHIO - NASA Administrator Michael Griffin presented the NASA Ambassadors of Exploration award to Neil Armstrong (left). At right is former awardee John Glenn. Armstrong received the award that includes a moon rock to recognize the sacrifices and dedication of the astronauts and others who were part of the Mercury, Gemini and Apollo programs. A former naval aviator, NASA test pilot and Apollo 11 commander, Armstrong was the first human to ever land a spacecraft on the moon and the first to step on the lunar surface. Armstrong's award will be displayed at the Cincinnati Museum Center at Union Terminal. Photo credit: NASA/Bill Ingalls

KSC-06pd0687

NASA Image and Video Library

2006-04-18

CINCINNATI, OHIO - Former astronaut Neil Armstrong stands next to the NASA Ambassadors of Exploration award presented to him by NASA Administrator Michael Griffin. Armstrong received the award that includes a moon rock to recognize the sacrifices and dedication of the astronauts and others who were part of the Mercury, Gemini and Apollo programs. A former naval aviator, NASA test pilot and Apollo 11 commander, Armstrong was the first human to ever land a spacecraft on the moon and the first to step on the lunar surface. Armstrong's award will be displayed at the Cincinnati Museum Center at Union Terminal. Photo credit: NASA/Bill Ingalls

EZ Pegasi - The last pieces of the puzzle

NASA Technical Reports Server (NTRS)

Howell, S. B.; Williams, W. M.; Barden, S. C.; Bopp, B. W.

1986-01-01

Based on UBV differential photometric observations carried out at the Braeside Observatory between October 19, 1984 and January 11, 1985, it is shown that EZ Peg is in synchronous rotation with a photometric period of 11.6626 days. The orbital solution of Griffin (1985) is in good agreement with the present results, and it is employed to analyze the emission properties of the Ca II and H-alpha emission in the system. It is suggested that the emission of the system is almost entirely associated with the primary component, and the two stars appear to be similar in size and luminosity.

KSC-2012-4418

NASA Image and Video Library

2012-08-14

CAPE CANAVERAL, Fla. -- National Space Club Florida Committee Chair Steve Griffin presents NASA Commercial Crew Program Manager Ed Mango with an eagle statue during the club's August luncheon at the Radisson Resort at the Port in Cape Canaveral, Fla. Mango was the event's guest speaker, discussing the innovative steps the agency is taking with industry partners to develop the next U.S. space transportation capability to and from low Earth orbit, which will eventually be available for use by the U.S. government and other commercial customers. To learn more about the Commercial Crew Program, visit www.nasa.gov/commercialcrew. Photo credit: Kim Shiflett

KSC-06pd1583

NASA Image and Video Library

2006-07-17

KENNEDY SPACE CENTER, FLA. - During the traditional post-flight walk-around after the landing of an orbiter, NASA Administrator Mike Griffin (right) shares a story with STS-121 Pilot Mark Kelly, Mission Specialist Lisa Nowak and Commander Steven Lindsey. Discovery's smooth and perfect landing was on time at 9:14 a.m. EDT on Runway 15 of NASA's Shuttle Landing Facility after traveling 5.3 million miles on 202 orbits. Mission elapsed time was 12 days, 18 hours, 37 minutes and 54 seconds. The landing is the 62nd at Kennedy Space Center and the 32nd for Discovery. Photo credit: NASA/Kim Shiflett

KSC-06pd1578

NASA Image and Video Library

2006-07-17

KENNEDY SPACE CENTER, FLA. - During the traditional post-flight walk-around after the landing of an orbiter, crew members Michael Fossum, mission specialist, and Steven Lindsey, commander, talk with NASA Administrator Mike Griffin (left). At right is Associate Administrator Rex Geveden. Discovery's smooth and perfect landing was on time at 9:14 a.m. EDT on Runway 15 of NASA's Shuttle Landing Facility after traveling 5.3 million miles on 202 orbits. Mission elapsed time was 12 days, 18 hours, 37 minutes and 54 seconds. The landing is the 62nd at Kennedy Space Center and the 32nd for Discovery. Photo credit: NASA/Kim Shiflett

Caucasus conflict challenges US space policy

NASA Astrophysics Data System (ADS)

Gwynne, Peter

2008-10-01

A leaked e-mail sent to staff by NASA administrator Michael Griffin has indicated that there could be a "lengthy" period with no US crew based on the International Space Station (ISS). His fears stem from a surprising source: the recent conflict between Georgia and Russia, and the subsequent occupation by Russian troops of South Ossetia - a disputed part of Georgia - and Georgia itself. It triggered a frosty relationship between the US and Russian governments, which has now cast doubts on an agreement to permit Americans to fly onboard the Russian Soyuz craft to reach the orbiting station.

Early milestones in the understanding of echolocation in bats.

PubMed

Grinnell, Alan D

2018-04-23

Almost 80 years ago, Griffin and Galambos discovered the phenomenon of echolocation in bats. Since then, the field has grown exponentially as new generations of investigators have joined the chase and technological advances have revolutionized working with ultrasound in the laboratory and in the field. Today our understanding of the diversity of behavioral and neural adaptations for echolocation constitutes one of the paramount triumphs of neuroethology. At the invitation of the editor in chief, I here review some of the important milestones in the discovery and early understanding of echolocation in bats through about the mid-1980s.

KSC-08pd1804

NASA Image and Video Library

2008-06-23

CAPE CANAVERAL, Fla. – A Senate field hearing held at the Canaveral Port Authority and chaired by Florida Sen. Bill Nelson (third from right on the dais) focuses on workforce related challenges at NASA's Kennedy Space Center and potential solutions to mitigate the transition's effects on the community. The hearing examined issues surrounding the retirement of the space shuttle and the transition to the new Orion/Ares system. At Nelson's right is Florida Sen. Mel Martinez. Seated at left are NASA representatives Deputy Associate Administrator of Exploration Systems Doug Cooke, Administrator Michael Griffin and Associate Administrator of Space Operations William Gerstenmaier. Photo credit: NASA/Kim Shiflett

S70-35594

NASA Image and Video Library

2008-08-07

S70-35594 (18 April 1970) --- President Richard M. Nixon presents the Presidential Medal of Freedom to the Apollo 13 Mission Operations Team at Manned Spacecraft Center (MSC). Accepting for the team is Sigurd A. Sjoberg, director of Flight Operations at MSC. Dr. Thomas O. Paine, Administrator, National Aeronautics and Space Administration (NASA), is at left. Also seen here on the speaker's platform are Jeffrey C. Lovell, son of astronaut James A. Lovell Jr., commander of the Apollo 13 mission; Gerald D. Griffin (second from right) and Milton L. Windler, two of four flight directors who worked around the clock during the mission.

Investigation on synthesis, growth, structure and physical properties of AgGa0.5In0.5S2 single crystals for Mid-IR application

NASA Astrophysics Data System (ADS)

Karunagaran, N.; Ramasamy, P.

2018-02-01

Silver Gallium Indium Sulfide (AgGa0.5In0.5S2) belongs to the family of AIBIIIC2VI ternary compound semiconductors which crystallize in the chalcopyrite structure. Synthesis of the polycrystalline material from the starting elements is achieved using melt temperature oscillation method. The AgGa0.5In0.5S2 single crystals have been grown by the vertical Bridgman technique. The synthesized AgGa0.5In0.5S2 polycrystalline charge was confirmed by powder XRD. The peak positions are in good agreement with the powder diffraction file. Thermal property was analyzed using differential scanning calorimetry (DSC) technique. The melting point of the crystal is 896 °C and freezing point is 862 °C. The unit cell parameters were confirmed by single crystal X-ray. The transmittance of the grown crystal is 55% in the NIR region and 60% in the mid-IR region. The optical band gap was found to be 2.0 eV. The stoichiometric composition of AgGa0.5In0.5S2 was measured using energy dispersive spectrometry (EDS). The photoluminescence behavior of AgGa0.5In0.5S2 has been analyzed. The resistivity of the grown single crystal has been measured.

Gamblers Anonymous as a Recovery Pathway: A Scoping Review.

PubMed

Schuler, Andrée; Ferentzy, Peter; Turner, Nigel E; Skinner, Wayne; McIsaac, Kathryn E; Ziegler, Carolyn P; Matheson, Flora I

2016-12-01

Given the preponderance of Gamblers Anonymous (GA), there has been relatively little effort to explore the existing evidence base on its effectiveness as a recovery approach for problem gambling. To remedy this gap in the literature we conducted a scoping review of the literature on mutual aid for individuals experiencing problem gambling published between 2002 and 2015. We searched 13 databases and reviewed reference lists and websites of relevant organizations. We reviewed records for eligibility and extracted relevant data from eligible articles. Three reviewers independently assessed the methodological quality of the included studies using the Mixed Methods Appraisal Tool. We identified 17 studies in 25 publications that were eligible for inclusion. Most studies were conducted in the United States, were cross-sectional in design, and involved both male and female adult participants. Results indicate that the evidence for the effectiveness of GA either as a control condition or in conjunction with formal treatment or medication is inconsistent. An emphasis on patience, using the Serenity Prayer as a way to gain acceptance of financial matters and reality, and absolute assertion of identity as a "compulsive gambler" were identified as important aspects of GA's recovery culture. There is a need for large-scale randomized controlled trials to determine GA's effectiveness, as well as research exploring the mechanisms through which GA works, barriers to GA as a recovery approach, and the status of women in the fellowship.

Structures, bonding, and reaction chemistry of the neutral organogallium(I) compounds (GaAr)n(n = 1 or 2) (Ar = terphenyl or related ligand): an experimental investigation of Ga-Ga multiple bonding.

PubMed

Hardman, Ned J; Wright, Robert J; Phillips, Andrew D; Power, Philip P

2003-03-05

The synthesis, structure, and properties of several new organogallium(I) compounds are reported. The monovalent compounds GaAr* (Ar* = C(6)H(3)-2,6-Trip(2), Trip = C(6)H(2)-2,4,6-Pr(i)()(3), 1), GaAr# (Ar# = C(6)H(3)-2,6(Bu(t)Dipp)(2), Bu(t)Dipp = C(6)H(2)-2,6-Pr(i)(2)-4-Bu(t)(), 4), and the dimeric (GaAr')(2) (Ar' = C(6)H(3)-2,6-Dipp(2), Dipp = C(6)H(3)-2,6-Pr(i)(2), 6) were synthesized by the reaction of "GaI" with (Et(2)O)LiAr*, (Et(2)O)LiAr# (3), or (LiAr')(2). Compounds 1 and 4 were isolated as green crystals, whereas 6 was obtained as a brown-red crystalline solid. All three compounds dissolved in hydrocarbon solvents to give green solutions and almost identical UV/visible spectra. Cryoscopy of 1 and 6 showed that they were monomeric in cyclohexane. Crystals of 1 and 4 were unsuitable for X-ray crystal structure determinations, but an X-ray data set for 6 showed that it was weakly dimerized in the solid with a long Ga-Ga bond of 2.6268(7) A and a trans-bent CGaGaC core array. The 1,2-diiodo-1,2-diaryldigallane compounds [Ga(Ar*)I](2) (2), [Ga(Ar#)I](2) (5), and [Ga(Ar')I](2) (7) were isolated as byproducts of the synthesis of 1, 4, and 6. The crystal structures of 2 and 7 showed that they had planar ICGaGaCI core arrays with Ga-Ga distances near 2.49 A, consistent with Ga-Ga single bonding. Treatment of 1, 4, and 6 with B(C(6)F(5))(3) immediately afforded the 1:1 donor-acceptor complexes ArGa[B(C(6)F(5))(3)] (Ar = Ar*, 8; Ar#, 9; Ar', 10) that featured almost linear gallium coordination, Ga-B distances near the sum of the covalent radii of gallium and boron, as well as some close Ga...F contacts. Compound 1 also reacted with Fe(CO)(5) under ambient conditions to give Ar*GaFe(CO)(4) (11), which had been previously synthesized by the reaction of GaAr*Cl(2) with Na(2)Fe(CO)(4). Reaction of 1 with 2,3-dimethyl-1,3-butadiene afforded the compound [Ar*GaCH(2)C(Me)C(Me)CH(2)]2 (12) that had a 10-membered 1,5-Ga(2)C(8) ring with no Ga-Ga interaction. Stirring 1 or 6 with sodium readily gave Na(2)[Ar*GaGaAr*] (13) and Na(2)(Ar'GaGaAr') (14). The former species 13 had been synthesized previously by reduction of GaAr*Cl(2) with sodium and was described as having a Ga-Ga triple bond because of the short Ga-Ga distance and the electronic relationship between [Ar*GaGaAr*](2-) and the corresponding neutral group 14 alkyne analogues. Compound 14 has a similar structure featuring a trans-bent CGaGaC core, bridged by sodiums which were also coordinated to the flanking aryl rings of the Ar' ligands. The Ga-Ga bond length was found to be 2.347(1) A, which is slightly (ca. 0.02 A) longer than that reported for 13. Reaction of Ga[N(Dipp)C(Me)](2)CH, 15 (i.e., GaN(wedge)NDipp(2)), which is sterically related to 1, 4, and 6, with Fe(CO)(5) yielded Dipp(2)N(wedge)NGaFe(CO)(4) (16), whose Ga-Fe bond is slightly longer than that observed in 11. Reaction of the less bulky LiAr"(Ar"= C(6)H(3)-2,6-Mes(2)) with "GaI" afforded the new paramagnetic cluster Ga(11)Ar(4)" (17). The ready dissociation of 1, 4, and 6 in solution, the long Ga-Ga distance in 6, and the chemistry of these compounds showed that the Ga-Ga bonds are significantly weaker than single bonds. The reduction of 1 and 6 with sodium to give 13 and 14 supplies two electrons to the di-gallium unit to generate a single bond (in addition to the weak interaction in the neutral precursor) with retention of the trans-bent geometry. It was concluded that the stability of 13 and 14 depends on the matching size of the sodium ion, and the presence of Na-Ga and Na-Ar interactions that stabilize their Na(2)Ga(2) core structures.

Mini-Craniotomy Under Local Anesthesia for Chronic Subdural Hematoma: An Effective Choice for Elderly Patients and for Patients in a Resource-Strained Environment.

PubMed

Mahmood, Shaikh Danish; Waqas, Muhammad; Baig, Mirza Zain; Darbar, Aneela

2017-10-01

Mini-craniotomy for chronic subdural hematoma (CSDH) is associated with lower rates of recurrence. However, the procedure is performed mostly with the patient under general anesthesia (GA) and therefore frequently requires an intensive care unit (ICU) facility, especially in the elderly population. Because of the unavailability of ICU beds, and to avoid GA, we started to perform this procedure with the patient under local anesthesia (LA). This was a retrospective medical chart review conducted in the section of Neurosurgery at the Aga Khan Hospital in Karachi, Pakistan. The study duration was 1 year. We included patients aged 55 years or older undergoing surgery for CSDH. Clinical characteristics, hospital stay, and recurrence rates were compared between 2 groups, local versus general anesthesia. Thirty-five patients underwent mini-craniotomy for CSDH in the study period. Sixteen patients underwent mini-craniotomy under LA versus 19 patients for GA. Median age for the LA group was 67 years compared with 70 years in the GA group. Four patients from the LA group experienced postoperative complications versus 7 from the GA group. Only one patient in the LA group required an ICU bed in the postoperative period. There was no recurrence in LA group. The overall recurrence was 2.86%. Mini-craniotomy for CSDH under LA is an equally effective procedure compared with mini-craniotomy under GA. In addition, it minimizes the risks of GA in the elderly population and obviates the need of a postoperative ICU bed. It also reduces operative time and hospital stay as compared with GA. Copyright © 2017 Elsevier Inc. All rights reserved.

Inductively coupled plasma-mass spectroscopy measurements of elemental release from 2 high-palladium dental casting alloys into a corrosion testing medium.

PubMed

Tufekci, Eser; Mitchell, John C; Olesik, John W; Brantley, William A; Papazoglou, Efstratios; Monaghan, Peter

2002-01-01

The biocompatibility of high-palladium alloy restorations has been of some concern due to the release of palladium into the oral environment and sensitivity reactions in patients. This study measured the in vitro elemental release from a Pd-Cu-Ga alloy and a Pd-Ga alloy into a corrosion testing medium. Both alloys were cast into 12-mm-diameter x 1-mm-thick disks, subjected to heat treatment that simulated porcelain firing cycles, polished to a 0.05-mm surface finish, and ultrasonically cleaned in ethanol. Two specimens of each alloy were immersed 3 times (at 7, 70, and 700 hours) in an aqueous lactic acid/NaCl solution used for in vitro corrosion testing and maintained at 37 degrees C. The specimens were removed after each immersion time, and the elemental compositions of the solutions were analyzed with inductively coupled plasma-mass spectroscopy (ICP-MS). Elemental concentrations for the 2 alloys at each immersion time were compared with Student t test (alpha=.05). No significant differences in palladium release were found for the 7- and 70-hour solutions, but significant differences were found for the 700-hour solutions. Mean concentrations of palladium and gallium in the 700-hour solutions, expressed as mass per unit area of alloy surface, were 97 (Pd) and 46 (Ga) microg/cm(2) for the Pd-Cu-Ga alloy and 5 (Pd) and 18 (Ga) microg/cm(2) for the Pd-Ga alloy. Relative proportions of the elements in the solutions were consistent with the release of palladium and breakdown of microstructural phases found in the alloys. The results suggest that there may be a lower risk of adverse biological reactions with the Pd-Ga alloy than with the Pd-Cu-Ga alloy tested.

Geriatric Assessment-Guided Care Processes for Older Adults: A Delphi Consensus of Geriatric Oncology Experts.

PubMed

Mohile, Supriya Gupta; Velarde, Carla; Hurria, Arti; Magnuson, Allison; Lowenstein, Lisa; Pandya, Chintan; O'Donovan, Anita; Gorawara-Bhat, Rita; Dale, William

2015-09-01

Structured care processes that provide a framework for how oncologists can incorporate geriatric assessment (GA) into clinical practice could improve outcomes for vulnerable older adults with cancer, a growing population at high risk of toxicity from cancer treatment. We sought to obtain consensus from an expert panel on the use of GA in clinical practice and to develop algorithms of GA-guided care processes. The Delphi technique, a well-recognized structured and reiterative process to reach consensus, was used. Participants were geriatric oncology experts who attended NIH-funded U13 or Cancer and Aging Research Group conferences. Consensus was defined as an interquartile range of 2 or more units, or 66.7% or greater, selecting a utility/helpfulness rating of 7 or greater on a 10-point Likert scale. For nominal data, consensus was defined as agreement among 66.7% or more of the group. From 33 invited, 30 participants completed all 3 rounds. Most experts (75%) used GA in clinical care, and the remainder were involved in geriatric oncology research. The panel met consensus that "all patients aged 75 years or older and those who are younger with age-related health concerns" should undergo GA and that all domains (function, physical performance, comorbidity/polypharmacy, cognition, nutrition, psychological status, and social support) should be included. Consensus was met for how GA could guide nononcologic interventions and cancer treatment decisions. Algorithms for GA-guided care processes were developed. This Delphi investigation of geriatric oncology experts demonstrated that GA should be performed for older patients with cancer to guide care processes. Copyright © 2015 by the National Comprehensive Cancer Network.

Yb5Ga2Sb6: a mixed valent and narrow-band gap material in the RE5M2X6 family.

PubMed

Subbarao, Udumula; Sarkar, Sumanta; Gudelli, Vijay Kumar; Kanchana, V; Vaitheeswaran, G; Peter, Sebastian C

2013-12-02

A new compound Yb5Ga2Sb6 was synthesized by the metal flux technique as well as high frequency induction heating. Yb5Ga2Sb6 crystallizes in the orthorhombic space group Pbam (no. 55), in the Ba5Al2Bi6 structure type, with a unit cell of a = 7.2769(2) Å, b = 22.9102(5) Å, c = 4.3984(14) Å, and Z = 2. Yb5Ga2Sb6 has an anisotropic structure with infinite anionic double chains (Ga2Sb6)(10-) cross-linked by Yb(2+) and Yb(3+) ions. Each single chain is made of corner-sharing GaSb4 tetrahedra. Two such chains are bridged by Sb2 groups to form double chains of 1/∞ [Ga2Sb6(10-)]. The compound satisfies the classical Zintl-Klemm concept and is a narrow band gap semiconductor with an energy gap of around 0.36 eV calculated from the electrical resistivity data corroborating with the experimental absorption studies in the IR region (0.3 eV). Magnetic measurements suggest Yb atoms in Yb5Ga2Sb6 exist in the mixed valent state. Temperature dependent magnetic susceptibility data follows the Curie-Weiss behavior above 100 K and no magnetic ordering was observed down to 2 K. Experiments are accompanied by all electron full-potential linear augmented plane wave (FP-LAPW) calculations based on density functional theory to calculate the electronic structure and density of states. The calculated band structure shows a weak overlap of valence band and conduction band resulting in a pseudo gap in the density of states revealing semimetallic character.

Structural ordering and interface morphology in symmetrically strained(GaIn)As/Ga(PAs) superlattices grown on off-oriented GaAs(100)

NASA Astrophysics Data System (ADS)

Giannini, C.; Tapfer, L.; Zhuang, Y.; de Caro, L.; Marschner, T.; Stolz, W.

1997-02-01

In this work we investigate the structural properties of symmetrically strained (GaIn)As/GaAs/Ga(PAs)/GaAs superlattices by means of x-ray diffraction, reciprocal-space mapping, and x-ray reflectivity. The multilayers were grown by metalorganic vapor-phase epitaxy on (001) GaAs substrates intentionally off-oriented towards one of the nearest <110> directions. High-resolution triple-crystal reciprocal-space maps recorded for different azimuth angles in the vicinity of the (004) Bragg diffraction clearly show a double periodicity of the x-ray peak intensity that can be ascribed to a lateral and a vertical periodicity occurring parallel and perpendicular to the growth surface. Moreover, from the intensity modulation of the satellite peaks, a lateral-strain gradient within the epilayer unit cell is found, varying from a tensile to a compressive strain. Thus, the substrate off-orientation promotes a lateral modulation of the layer thickness (ordered interface roughness) and of the lattice strain, giving rise to laterally ordered macrosteps. In this respect, contour maps of the specular reflected beam in the vicinity of the (000) reciprocal lattice point were recorded in order to inspect the vertical and lateral interface roughness correlation. A semiquantitative analysis of our results shows that the interface morphology and roughness is greatly influenced by the off-orientation angle and the lateral strain distribution. Two mean spatial wavelengths can be determined, one corresponding exactly to the macrostep periodicity and the other indicating a further interface waviness along the macrosteps. The same spatial periodicities were found on the surface by atomic-force-microscopy images confirming the x-ray results and revealing a strong vertical correlation of the interfaces up to the outer surface.

Application of two direct runoff prediction methods in Puerto Rico

USGS Publications Warehouse

Sepulveda, N.

1997-01-01

Two methods for predicting direct runoff from rainfall data were applied to several basins and the resulting hydrographs compared to measured values. The first method uses a geomorphology-based unit hydrograph to predict direct runoff through its convolution with the excess rainfall hyetograph. The second method shows how the resulting hydraulic routing flow equation from a kinematic wave approximation is solved using a spectral method based on the matrix representation of the spatial derivative with Chebyshev collocation and a fourth-order Runge-Kutta time discretization scheme. The calibrated Green-Ampt (GA) infiltration parameters are obtained by minimizing the sum, over several rainfall events, of absolute differences between the total excess rainfall volume computed from the GA equations and the total direct runoff volume computed from a hydrograph separation technique. The improvement made in predicting direct runoff using a geomorphology-based unit hydrograph with the ephemeral and perennial stream network instead of the strictly perennial stream network is negligible. The hydraulic routing scheme presented here is highly accurate in predicting the magnitude and time of the hydrograph peak although the much faster unit hydrograph method also yields reasonable results.

An exploration of the impact of family background factors on the science achievement of Afro-Caribbean and African American students in the United States

NASA Astrophysics Data System (ADS)

Pinder, Patrice J.

Ogbu and Simons (1998) defined voluntary immigrants as individuals who chose to migrate to the United States (U.S.). Involuntary immigrants are defined as individuals whose ancestors were brought to the U.S. by force (Obgu & Simons, 1998). There have been recent reports indicating that voluntary immigrants are outperforming involuntary immigrants (Fisher, 2005; Williams, Fleming, Jones, & Griffin, 2007). There seems to be a trend in voluntary immigrants exhibiting a higher academic achievement pattern than involuntary immigrants (Fisher, 2005; Rong & Preissle, 1998; Williams et al., 2007). However, the reason for the groups' differences in achievement has not been extensively explored. The primary objective of this research study was to explore the impact of family background on the academic achievement patterns of Afro-Caribbean and African American students in the United States. The study utilized two research designs; a causal-comparative and a correlational design. A questionnaire was distributed to a sample of eighty-seven high school students. Eighteen of the participants were Afro-Caribbean students, and sixty-seven were African American students. Chemistry test scores for the students were also provided. The results of the study indicated that Afro-Caribbean students outperformed African American students on the test of science achievement. The difference was statistically significant (t= 2.43, p<0.05). Additionally, results suggested that there were a few significant differences in Afro-Caribbean and African American students' family backgrounds. Moreover, the findings of this study suggest that the positive impact of arrival status on the first-generation of Afro-Caribbean immigrants may be influencing their children's academic success in science. The present study holds a few implications for parents and teachers of immigrant minority students. Additionally, the current researcher has offered several implications for future research on ethnicity, immigration pattern, parenting, and achievement.

An Impact Event on the Lunar Surface at ~3.3 Ga Inferred From 40Ar/39Ar Thermochronometry of Multiple Samples in Apollo 16 Soil 63503

NASA Astrophysics Data System (ADS)

Shuster, D. L.; Barrick-Bethell, I.; Fernandes, V. A.; Weiss, B. P.

2008-12-01

High-Resolution 40Ar/39Ar thermochronometry conducted on 8 separate whole-rock samples including shocked anorthosites, anorthositic impact melts, and fragmented breccias from Apollo 16 soil 63503 reveals an apparently short-duration thermal disturbance at ~3.3 Ga. Using feedback-controlled laser heating, we quantified the Ar diffusion kinetics and spatial distribution of radiogenic 40Ar (primarily contained in plagioclase) for each rock. Five of the samples show clear evidence for a partial resetting event in the K-Ar system at ~3.3 ± 0.1 Ga, despite two of them having 40Ar/39Ar "plateau" ages of ~3.9 Ga, and 3 having ages of ~4.2 Ga. Assuming that the observed Ar diffusion kinetics applies over all time, we constrained a time-temperature (t-T) pair required to diffusively perturb each of the 40Ar distributions at 3.3 Ga and result in the observed 40Ar/39Ar age spectra today. For each sample, this calculation quantified the non-dimensional parameter Dt/a2, with an estimated uncertainty. With each sample's Ar diffusion kinetics, the value of Dt/a2 corresponds to a non- unique family of t-T pairs (shown as continuous curves in t versus T); each pair would result in equivalent diffusive disturbance of the 40Ar spatial distribution at 3.3 Ga. Assuming there exists a best- fit solution for all 8 samples (i.e., that all samples experienced a common thermal event at 3.3 Ga), we constrain the unique t-T solution by minimizing the differences between each. We find that an instantaneous increase in temperature from ambient lunar near-surface conditions to ~530 °C for ~2.5 hours at 3.3 Ga would best explain the entire dataset, although longer durations (~days) spent cooling down to lower temperatures are permissible within the data uncertainty. The dataset also excludes the possibility of significant thermal disturbances after 3.3 Ga. We interpret the best-fit solution to represent the mean thermal state of the rocks during an impact event at ~3.3 Ga. This event may have helped mix separate ejecta units in the Cayley Plains and resulted in an admixture of both ~3.9 Ga and ~4.2 Ga aged rocks in lunar soil 63503.

Preterm birth, social disadvantage, and cognitive competence in Swedish 18- to 19-year-old men.

PubMed

Ekeus, Cecilia; Lindström, Karolina; Lindblad, Frank; Rasmussen, Finn; Hjern, Anders

2010-01-01

The aim was to study the impact of a range of gestational ages (GAs) on cognitive competence in late adolescence and how this effect is modified by contextual social adversity in childhood. This was a register study based on a national cohort of 119664 men born in Sweden from 1973 to 1976. Data on GA and other perinatal factors were obtained from the Medical Birth Register, and information on cognitive test scores was extracted from military conscription at the ages of 18 to 19 years. Test scores were analyzed as z scores on a 9-point stanine scale, whereby each unit is equivalent to 0.5 SD. Socioeconomic indicators of the childhood household were obtained from the Population and Housing Census of 1990. The data were analyzed by multivariate linear regression. The mean cognitive test scores decreased in a stepwise manner with GA. In unadjusted analysis, the test scores were 0.63 stanine unit lower in men who were born after 24 to 32 gestational weeks than in those who were born at term. The difference in global scores between the lowest and highest category of socioeconomic status was 1.57. Adjusting the analysis for the childhood socioeconomic indicators decreased the effect of GA on cognitive test scores by 26% to 33%. There was also a multiplicative interaction effect of social adversity and moderately preterm birth on cognitive test scores. This study confirms previous claims of an incremental association of cognitive competence with GA. Socioeconomic indicators in childhood modified this effect at all levels of preterm birth.

1. VIEW OF NORTHEAST (GABLE END) AND SOUTHEAST WALLS FROM ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. VIEW OF NORTHEAST (GABLE END) AND SOUTHEAST WALLS FROM HOOD AVENUE, FACING NORTHWEST. - Fort McPherson, World War II Station Hospital, G. U. Treatment Unit Mess Hall, Thorne & Hood Avenues, Atlanta, Fulton County, GA

3. VIEW OF SOUTH SIDE AND EAST SIDE (GABLE END), ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. VIEW OF SOUTH SIDE AND EAST SIDE (GABLE END), FACING NORTHWEST FROM HOOD AVENUE. - Fort McPherson, World War II Station Hospital, G. U. Treatment Unit Barracks, Nininger Way, Atlanta, Fulton County, GA

2. VIEW OF NORTHWEST SIDE SHOWING NORTHEAST (GABLE END) FRONT. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. VIEW OF NORTHWEST SIDE SHOWING NORTHEAST (GABLE END) FRONT. (BUILDING 114 IS VISIBLE ON RIGHT.) - Fort McPherson, World War II Station Hospital, G. U. Treatment Unit Dispensary, Thorne Avenue, Atlanta, Fulton County, GA

Fourier transform imaging of impurities in the unit cells of crystals: Mn in GaAs

NASA Astrophysics Data System (ADS)

Lee, T.-L.; Bihler, C.; Schoch, W.; Limmer, W.; Daeubler, J.; Thieß, S.; Brandt, M. S.; Zegenhagen, J.

2010-06-01

The lattice sites of Mn in ferromagnetic (Ga,Mn)As thin films were imaged using the x-ray standing wave technique. The model-free images, obtained straightforwardly by Fourier inversion, disclose immediately that the Mn mostly substitutes the Ga with a small fraction residing on minority sites. The images further reveal variations in the Mn concentrations of the different sites upon post-growth treatments. Subsequent model refinement based on the directly reconstructed images resolves with high precision the complete Mn site distributions. It is found that post-growth annealing increases the fraction of substitutional Mn at the expense of interstitial Mn whereas hydrogenation has little influence on the Mn site distribution. Our study offers an element-specific high-resolution imaging approach for accurately determining the detailed site distributions of dilute concentrations of atoms in crystals.

Properties of epitaxial BaTiO{sub 3} deposited on GaAs

DOE Office of Scientific and Technical Information (OSTI.GOV)

Contreras-Guerrero, R.; Droopad, R.; Veazey, J. P.

2013-01-07

Single crystal BaTiO{sub 3} (BTO) has been grown epitaxially on GaAs using molecular beam epitaxy with a 2 unit cell SrTiO{sub 3} nucleation layer. The oxide film is lattice-matched to GaAs through an in-plane rotation of 45 Degree-Sign relative to the (100) surface leading to c-axis orientation of the BaTiO{sub 3}. X-ray diffraction confirmed the crystallinity and orientation of the oxide film with a full width half maximum of 0.58 Degree-Sign for a 7.5 nm thick layer. Piezoresponse force microscopy was used to characterize the ferroelectric domains in the BaTiO{sub 3} layer, and a coercive voltage of 1-2 V andmore » piezoresponse amplitude {approx}5 pm/V was measured.« less

{[Ga(en){sub 3}]{sub 2}(Ge{sub 2}Te{sub 15})}n : a polymeric semiconducting polytelluride with boat-shaped Te{sub 8}{sup 4-} rings and cross-shaped Te{sub 5}{sup 6-} units.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Zhang, Q.; Malliakas, C. D.; Kanatzidis, M. G.

2009-11-11

The reaction of the Zintl compound K{sub 4}Ge{sub 9} with Te and Ga{sub 2}Te{sub 3} in ethylenediamine (en) at 190 C gave the germanium polytelluride {l_brace}[Ga(en){sub 3}]{sub 2}[(GeTe){sub 2}(Te{sub 5}){sup 6-}(Te{sub 8}){sup 4-}]{r_brace}n (1). The single-crystal structure analysis revealed that 1 has two different polytelluride fragments: cross-shaped 36-e- TeTe{sub 4}{sup 6-} anions and boat-shaped 52-e- Te{sup 8}{sup 4-} rings. The new material is a p-type semiconductor at room temperature and switches to n-type at 380 K.

N/P GaAs concentrator solar cells with an improved grid and bushbar contact design

NASA Technical Reports Server (NTRS)

Desalvo, G. C.; Mueller, E. H.; Barnett, A. M.

1985-01-01

The major requirements for a solar cell used in space applications are high efficiency at AMO irradiance and resistance to high energy radiation. Gallium arsenide, with a band gap of 1.43 eV, is one of the most efficient sunlight to electricity converters (25%) when the the simple diode model is used to calculate efficiencies at AMO irradiance, GaAs solar cells are more radiation resistant than silicon solar cells and the N/P GaAs device has been reported to be more radiation resistant than similar P/N solar cells. This higher resistance is probably due to the fact that only 37% of the current is generated in the top N layer of the N/P cell compared to 69% in the top layer of a P/N solar cell. This top layer of the cell is most affected by radiation. It has also been theoretically calculated that the optimized N/P device will prove to have a higher efficiency than a similar P/N device. The use of a GaP window layer on a GaAs solar cell will avoid many of the inherent problems normally associated with a GaAlAs window while still proving good passivation of the GaAs surface. An optimized circular grid design for solar cell concentrators has been shown which incorporates a multi-layer metallization scheme. This multi-layer design allows for a greater current carrying capacity for a unit area of shading, which results in a better output efficiency.

Choroidal Round Hyporeflectivities in Geographic Atrophy.

PubMed

Corbelli, Eleonora; Sacconi, Riccardo; De Vitis, Luigi Antonio; Carnevali, Adriano; Rabiolo, Alessandro; Querques, Lea; Bandello, Francesco; Querques, Giuseppe

2016-01-01

In geographic atrophy (GA), choroidal vessels typically appear on structural optical coherence tomography (OCT) as hyperreflective round areas with highly reflective borders. We observed that some GA eyes show choroidal round hyporeflectivities with highly reflective borders beneath the atrophy, and futher investigated the charcteristcs by comparing structural OCT, indocyanine green angiography (ICGA) and OCT angiography (OCT-A). Round hyporeflectivities were individuated from a pool of patients with GA secondary to non-neovascular age-related macular degeneration consecutively presenting between October 2015 and March 2016 at the Medical Retina & Imaging Unit of the University Vita-Salute San Raffaele. Patients underwent a complete ophthalmologic examination including ICGA, structural OCT and OCT-A. The correspondence between choroidal round hyporeflectivities beneath GA on structural OCT and ICGA and OCT-A imaging were analyzed. Fifty eyes of 26 consecutive patients (17 females and 9 males; mean age 76.8±6.2 years) with GA were included. Twenty-nine round hyporeflectivities have been found by OCT in choroidal layers in 21 eyes of 21 patients (42.0%; estimated prevalence of 57.7%). All 29 round hyporeflectivities showed constantly a hyperreflective border and a backscattering on structural OCT, and appeared as hypofluorescent in late phase ICGA and as dark foci with non detectable flow in the choroidal segmentation of OCT-A. Interestingly, the GA area was greater in eyes with compared to eyes without round hyporeflectivities (9.30±5.74 and 5.57±4.48mm2, respectively; p = 0.01). Our results suggest that most round hyporeflectivities beneath GA may represent non-perfused or hypo-perfused choroidal vessels with non-detectable flow.

Field evidence of Eros-scale asteroids and impact-forcing of Precambrian geodynamic episodes, Kaapvaal (South Africa) and Pilbara (Western Australia) Cratons

NASA Astrophysics Data System (ADS)

Glikson, Andrew Y.

2008-03-01

The role of asteroid and comet impacts as triggers of mantle-crust processes poses one of the fundamental questions in Earth science. I present direct field evidence for close associations between impact ejecta/fallout units, major unconformities and lithostratigraphic boundaries in Archaean and early Proterozoic terrains, including abrupt changes in the composition of volcanic and sedimentary assemblages across stratigraphic impact boundaries, with implications for the nature and composition of their provenance terrains. As originally observed by D.R. Lowe and G.R. Byerly, in the Barberton Greenstone Belt, eastern Kaapvaal Craton, South Africa, 3.26-3.24 Ga asteroid mega-impact units are closely associated with the abrupt break between an underlying simatic mafic-ultramafic volcanic crust and an overlying association of turbidites, banded iron formations, felsic tuff and conglomerates of continental affinities. Contemporaneous stratigraphic relationships are identified in the Pilbara Craton, Western Australia. Evidence for enrichment of seawater in ferrous iron in the wake of major asteroid impacts reflects emergence of new source terrains, likely dominated by mafic compositions, attributed to impact-triggered oceanic volcanic activity. Relationships between impact and volcanic activity are supported by the onset of major mafic dyke systems associated with ~ 2.48 Ga and possibly the 2.56 Ga mega-impact events.

Spectroscopic and thermal study of a new glass from TeO2sbnd Ga2O3sbnd GeO2 system

NASA Astrophysics Data System (ADS)

Marczewska, Agnieszka; Środa, Marcin

2018-07-01

Tellurium oxide and germanium oxide based glasses are classified as the heavy metal oxide glasses, with phonon energies below 880 cm-1. These glasses transmit to longer wavelengths when compared to borate, phosphate and silicate glasses because of the heavier mass of germanium. In this paper we present a new promising TeO2sbnd Ga2O3sbnd GeO2 glasses with high thermal stability and good optical properties in the near and mid-IR regions. The glass can be easily obtained for the wide range of Te/Ge ratio, which gives opportunity to engineering desirable properties. Based on the FT-IR spectra it could be stated that the tellurite network is monotonically transformed into germanate one as the GeO2 content increases. Admixtures of GeO2 into the network of tellurite glass causes the conversion of [TeO4] to [TeO3] units. Thus, the network of the glass could be consider as a mixture of the [TeO4], [TeO3] and [GeO4] units and with Ga3+ ions playing the role of its modifier. The glasses demonstrate high transmittance in mid-IR up to 6 μm what makes these materials suitable for mid-IR applications.

Structural convergence properties of amorphous InGaZnO4 from simulated liquid-quench methods.

PubMed

Buchanan, Jacob C; Fast, Dylan B; Hanken, Benjamin E; Mustard, Thomas J L; Laurita, Geneva; Chiang, Tsung-Han; Keszler, Douglas A; Subramanian, Mas A; Wager, John F; Dolgos, Michelle R; Rustad, James R; Cheong, Paul Ha-Yeon

2017-11-14

The study of structural properties of amorphous structures is complicated by the lack of long-range order and necessitates the use of both cutting-edge computer modeling and experimental techniques. With regards to the computer modeling, many questions on convergence arise when trying to assess the accuracy of a simulated system. What cell size maximizes the accuracy while remaining computationally efficient? More importantly, does averaging multiple smaller cells adequately describe features found in bulk amorphous materials? How small is too small? The aims of this work are: (1) to report a newly developed set of pair potentials for InGaZnO 4 and (2) to explore the effects of structural parameters such as simulation cell size and numbers on the structural convergence of amorphous InGaZnO 4 . The total number of formula units considered over all runs is found to be the critical factor in convergence as long as the cell considered contains a minimum of circa fifteen formula units. There is qualitative agreement between these simulations and X-ray total scattering data - peak trends and locations are consistently reproduced while intensities are weaker. These new IGZO pair potentials are a valuable starting point for future structural refinement efforts.

Survival of the very-low-birth-weight infants after cardiopulmonary resuscitation in neonatal intensive care unit.

PubMed

Kostelanetz, Anna S; Dhanireddy, Ramasubbareddy

2004-05-01

To assess whether advances in neonatal care in the last decade have altered the outcome of very-low-birth-weight (VLBW) infants after cardiopulmonary resuscitation (CPR) in the neonatal intensive care unit (NICU). Medical records of all VLBW infants (n=283, body weight (BW)=1066+/-281 g, gestational age (GA)=28.3+/-2.9 weeks) admitted to the NICU between 1999 and 2002 were reviewed. In all, 29 (10.25%) infants received CPR in the NICU. Only one of these infants survived. After adjusting for GA, the clinical variables significantly associated with the need for CPR in the NICU were (adjusted odds ratio; 95% CI): pulmonary hemorrhage (7.89; 3.06 to 20.28), pulmonary air leak syndrome (23.90; 7.58 to 75.4), and delivery by Cesarian section (0.26; 0.1 to 0.66). The results were similar when the data were reanalyzed matching the 28 infants in the CPR group with 28 infants of identical GA in the non-CPR group. Survival rate for the infants who require CPR in the NICU remains extremely poor. This poor outcome needs to be discussed with parents and the option of the "do not resuscitate" (DNR) order may be appropriate for these infants, especially for those infants with multiple organ failure unresponsive to therapy.

Study on the effects of Ga-2N high co-doping and preferred orientation on the stability, bandgap and absorption spectrum of ZnO

NASA Astrophysics Data System (ADS)

Hou, Qing-Yu; Li, Wen-Cai; Qu, Ling-Feng; Zhao, Chun-Wang

2017-06-01

Currently, the stability and visible light properties of Ga-2N co-doped ZnO systems have been studied extensively by experimental analysis and theoretical calculations. However, previous theoretical calculations arbitrarily assigned Ga- and 2N-doped sites in ZnO. In addition, the most stable and possible doping orientations of doped systems have not been fully and systematically considered. Therefore, in this paper, the electron structure and absorption spectra of the unit cells of doped and pure systems were calculated by first-principles plane-wave ultrasoft pseudopotential with the GGA+U method. Calculations were performed for pure ZnO, Ga-2N supercells heavily co-doped with Zn1-xGaxO1-yNy (x = 0.03125 - 0.0625, y = 0.0625 - 0.125) under different co-doping orientations and conditions, and the Zn16GaN2O14 interstitial model. The results indicated that under different orientations and constant Ga-2N co-doping concentrations, the systems co-doped with Ga-N atoms vertically oriented to the c-axis and with another N atom located in the nearest-neighboring site exhibited higher stability over the others, thus lowering formation energy and facilitating doping. Moreover, Ga-interstitial- and 2N-co-doped ZnO systems easily formed chemical compounds. Increasing co-doping concentration while the co-doping method remained constant decreased doped system volume and lowered formation energies. Meantime, co-doped systems were more stable and doping was facilitated. The bandgap was also narrower and red shifting of the absorption spectrum was more significant. These results agreed with previously reported experimental results. In addition, the absorption spectra of Ga-interstitial- and 2N-co-doped ZnO both blue shifted in the UV region compared with that of the pure ZnO system.

Characterization of endocrine-disruption and clinical manifestations in large-mouth bass from Florida lakes

DOE Office of Scientific and Technical Information (OSTI.GOV)

Gross, D.A.; Gross, T.S.; Johnson, B.

1995-12-31

Previous efforts from this laboratory have documented altered endocrine function and sexual differentiation for alligators and turtles from Lake Apopka in Central Florida. This lake has been exposed to a variety of contaminants which are potentially endocrine-disrupting. Therefore, a survey of large mouth bass populations was conducted on several lakes in North Central Florida to examine reproductive and clinical health. Large-mouth bass were collected from lakes Apopka, Griffin, Jessup and Woodruff. Approximately 24 fish (12 males and 12 females) were collected from each lake during the spawning (March--April) and non-reproductive (July--August) seasons. Plasma samples were collected for analysis of estrogen,more » testosterone and 11-keto-testosterone concentrations. Gonadal and liver tissues were collected for histological analysis. General blood chemistry analyses and parasite surveys were also conducted to estimate general health. Additionally, fillet samples were collected and analyzed for pesticide levels. Fish from Lake Apopka had unusual concentrations of estrogen and 11-keto-testosterone in plasma when compared to bass from Lakes Woodruff, Jessup and Griffin. Parasites loads were significantly higher for bass from lake Apopka than from the other lakes. Male bass on Apopka had depressed concentrations of 11-keto-testosterone, skewing the E/T ratios upward while female bass had higher concentrations of estrogens than females from the other lakes, again resulting in skewed E/T ratios. These skewed E/T ratios are similar to those observed for alligators on the same lake and raise the possibility that they are caused by contaminants. However, contaminant levels in fillets did not differ significantly between lakes. These studies indicate potentially altered reproductive and immunological function for large-mouth bass living in a contaminated lake.« less

4. VIEW OF EAST (GABLE END) SIDE AND NORTH SIDE ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. VIEW OF EAST (GABLE END) SIDE AND NORTH SIDE FROM NORTHEAST. (BUILDING 117 IS VISIBLE ON LEFT.) - Fort McPherson, World War II Station Hospital, G. U. Treatment Unit Lavatory, Hood Avenue, Atlanta, Fulton County, GA

Offshore Wind Energy Systems

ERIC Educational Resources Information Center

Musgrove, P.

1978-01-01

Explores the possibility of installing offshore windmills to provide electricity and to save fuel for the United Kingdom. Favors their deployment in clusters to facilitate supervision and minimize cost. Discusses the power output and the cost involved and urges their quick development. (GA)

2. VIEW OF SOUTH AND EAST WALLS, FACING NORTHWEST. (BUILDINGS ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. VIEW OF SOUTH AND EAST WALLS, FACING NORTHWEST. (BUILDINGS 122 AND 128 ARE VISIBLE IN THE BACKGROUND.) - Fort McPherson, World War II Station Hospital, G. U. Treatment Unit Lavatory, Hood Avenue, Atlanta, Fulton County, GA

Geochemical and Nd isotopic constraints for the origin of Late Archean turbidites from the Yellowknife area, Northwest Territories, Canada

NASA Astrophysics Data System (ADS)

Yamashita, Katsuyuki; Creaser, Robert A.

1999-10-01

A detailed geochemical and isotopic study of Late Archean turbidites and volcanic rocks from the Yellowknife area, Slave province, was undertaken to constrain the nature of exposed crust at the time of 2.6 to 2.7 Ga crustal consolidation. The ɛNdT values of the volcanic rocks range from +1.7 to -4.4. This variation can be produced by assimilation of pre-2.8 Ga basement by a depleted mantle-derived magma, possibly followed by fractional crystallization. The turbidites are typically metamorphosed to greenschist to amphibolite facies, and where metamorphosed to greenschist facies, different units of Bouma sequence can be observed. The different units of Bouma sequence were sampled and analyzed separately to evaluate the possible differences in geochemical and isotopic signatures. The geochemical data presented here is in accord with the previously proposed model that argues for a mixture of 20% mafic-intermediate volcanic rocks, +55% felsic volcanic rocks, and +25% granitic rocks as a source of these turbidites. However, our revised calculation with the new data presented here argues for 1 to 2% input from an ultramafic source, as well as somewhat higher input from mafic-intermediate volcanic sources in the upper shale units compared to the lower sand units. The ɛNdT values of the turbidites generally are lower in the upper shale units compared to the lower sand units. Detailed inspection of trace-element data suggest that this is not an artifact of rare earth element-rich heavy minerals concentrating in the lower sand units of the turbidites, but rather is a result of “unmixing” of detritus with different ɛNdT values during sediment transportation and deposition. The upper shale units of the turbidites are isotopically compatible with a derivation mainly from crustally contaminated volcanic rocks, similar to those exposed in the Yellowknife area. The lower sand units contain a higher proportion of westerly derived plutonic rock detritus, characterized by higher ɛNdT, suggesting that there are area(s) west of Yellowknife not underlain by older (2.8-4.0 Ga) basement. The trace-element characteristics of these turbidites (i.e., Cr, Ni, La, Th, Sc, Eu/Eu∗, and GdN/YbN) are distinct from those of typical post-Archean turbidites. This observation is consistent with the models that predict that the chemical composition of the upper continental crust was slightly different in the Archean compared to post-Archean time.

Graphene-based quantum Hall resistance standards grown by chemical vapor deposition on silicon carbide

NASA Astrophysics Data System (ADS)

Ribeiro-Palau, Rebeca; Lafont, Fabien; Kazazis, Dimitris; Michon, Adrien; Couturaud, Olivier; Consejo, Christophe; Jouault, Benoit; Poirier, Wilfrid; Schopfer, Felicien

2015-03-01

Replace GaAs-based quantum Hall resistance standards (GaAs-QHRS) by a more convenient one, based on graphene (Gr-QHRS), is an ongoing goal in metrology. The new Gr-QHRS are expected to work in less demanding experimental conditions than GaAs ones. It will open the way to a broad dissemination of quantum standards, potentially towards industrial end-users, and it will support the implementation of a new International System of Units based on fixed fundamental constants. Here, we present accurate quantum Hall resistance measurements in large graphene Hall bars, grown by the hybrid scalable technique of propane/hydrogen chemical vapor deposition (CVD) on silicon carbide (SiC). This new Gr-QHRS shows a relative accuracy of 1 ×10-9 of the Hall resistance under the lowest magnetic field ever achieved in graphene. These experimental conditions surpass those of the most wildely used GaAs-QHRS. These results confirm the promises of graphene for resistance metrology applications and emphasizes the quality of the graphene produced by the CVD on SiC for applications as demanding as the resistance metrology.

Decreased term and postterm birthweight in the United States: impact of labor induction.

PubMed

Zhang, Xun; Joseph, K S; Kramer, Michael S

2010-08-01

We sought to assess recent trends in falling mean birthweight (BW) and gestational age (GA) among US non-Hispanic white singleton live births >or=37 weeks of gestation and the contribution of increased rates of induction to these trends. This was an ecological study based on US vital statistics from 1992 through 2003. From 1992 through 2003, mean BW fell by 37 g, mean GA by 3 days, and macrosomia rates by 25%. Rates of induction nearly doubled from 14% to 27%. Our ecological state-level analysis showed that the increased rate of induction was significantly associated with reduced mean BW (r = -0.54; 95% confidence interval [CI], -0.71 to -0.29), mean GA (r = -0.44; 95% CI, -0.65 to -0.17), and rate of macrosomia (r = -0.55; 95% CI, -0.74 to -0.32). Increasing use of induction is a likely cause of the observed recent declines in BW and GA. The impact of these trends on infant and long-term health warrants attention and investigation. Copyright (c) 2010 Mosby, Inc. All rights reserved.

Tailoring magnetostriction with various directions for directional solidification Fe82Ga15Al3 alloy by magnetic field heat treatment

NASA Astrophysics Data System (ADS)

Li, Xiaolong; Bao, Xiaoqian; Liu, Yangyang; Yu, Linhua; Li, Jiheng; Gao, Xuexu

2017-10-01

The magnetostriction of the Fe82Ga15Al3 alloy, along the length and width, can be tailored by applying a magnetic field heat treatment. In this work, the Fe82Ga15Al3 sheet was cut from the directional solidified Fe82Ga15Al3 alloy with the ⟨100⟩ preferred orientation and was annealed at 720 °C for 30 min under a magnetic field of 800 Oe along the length direction with a heating and cooling rate of 100 °C/min. The magnetostrictive properties along the length and width directions were modified to λ// = 7 ppm and λ⊥ = -210 ppm from λ// = 210 ppm and λ⊥ = -10 ppm for the initial sample prior to the magnetic field heat treatment. The cellular-like magnetic domain structure was composed of parallel 180° stripe domains and vertical 90° domains observed using a magnetic-force microscope. The change in magnetostriction along parallel and perpendicular directions was mainly resulted from the rotation of the magnetic domain units.

Digital X-ray portable scanner based on monolithic semi-insulating GaAs detectors: General description and first “quantum” images

NASA Astrophysics Data System (ADS)

Dubecký, F.; Perd'ochová, A.; Ščepko, P.; Zat'ko, B.; Sekerka, V.; Nečas, V.; Sekáčová, M.; Hudec, M.; Boháček, P.; Huran, J.

2005-07-01

The present work describes a portable digital X-ray scanner based on bulk undoped semi-insulating (SI) GaAs monolithic strip line detectors. The scanner operates in "quantum" imaging mode ("single photon counting"), with potential improvement of the dynamic range in contrast of the observed X-ray images. The "heart" of the scanner (detection unit) is based on SI GaAs strip line detectors. The measured detection efficiency of the SI GaAs detector reached a value of over 60 % (compared to the theoretical one of ˜75 %) for the detection of 60 keV photons at a reverse bias of 200 V. The read-out electronics consists of 20 modules fabricated using a progressive SMD technology with automatic assembly of electronic devices. Signals from counters included in the digital parts of the modules are collected in a PC via a USB port and evaluated by custom developed software allowing X-ray image reconstruction. The collected data were used for the creation of the first X-ray "quantum" images of various test objects using the imaging software developed.

‘GA 03564-12E6’: A high-yielding soft red winter wheat cultivar adapted to Georgia and the southeastern regions of the United States

USDA-ARS?s Scientific Manuscript database

Soft red winter wheat (SRWW) (Triticum aestivum L.) is a major crop in the southeastern region of the United States and in Georgia. Although wheat acreages have been decreasing in Georgia and the SE region in recent years, more than 100,000 ha were grown to SRWW in 2015. Newly released cultivars mus...

Bridging Two Worlds: From the Archean to the Proterozoic

NASA Technical Reports Server (NTRS)

Schopf, J. William

2000-01-01

As now known, the Archean and Proterozoic appear to have been different worlds: the geology (tectonic style, basinal distribution, dominant rock types), atmospheric composition (O2, CO21, CH4), and surface environment (day-length, solar luminosity, ambient temperature) all appear to have changed over time. And virtually all paleobiologic indicators can be interpreted as suggesting there were significant biotic differences as well: (1) Stromatolites older than 2.5 Ga are rare relative to those of the Proterozoic; their biotic components are largely unknown; and the biogenicity of those older than approx. 3.2 Ga has been questioned. (2) Bona fide microfossils older than approx. 2.4 Ga are rare, poorly preserved, and of uncertain biological relations. Gaps of hundreds of millions of years in the known record make it impossible to show that Archean microorganisms are definitely part of the 2.4 Ga-to-present evolutionary continuum. and (3) In rocks older than approx. 2.2 Ga, the sulfur isotopic record is subject to controversy; phylogenetically distinctive bio-markers are unknown; and nearly a score of geologic units contain organic carbon anomalously light isotopically (relative to that of the Proterozoic and Phanerozoic) that may reflect the presence of Archaeans ("Archaebacteria of earlier classifications) but may not (since cellularly preserved Archean-age Archaeans have never been identified).

Compositional studies of Mare Moscoviense: New perspectives from Chandrayaan-1 VIS-NIR data

NASA Astrophysics Data System (ADS)

Bhatt, Megha; Wöhler, Christian; Dhingra, Deepak; Thangjam, Guneshwar; Rommel, Daniela; Mall, Urs; Bhardwaj, Anil; Grumpe, Arne

2018-03-01

Moscoviense is one of the prominent mare-filled basin on the lunar far side holding key insights about volcanic activity on the far side. Here, we present spectral and elemental maps of mare Moscoviense, using the Moon Mineralogy Mapper (M3) and Infrared Spectrometer-2 (SIR-2) data-sets. The different mare units are mapped based on their spectral properties analyzing both quantitatively (band center, band depth) and qualitatively (Integrated Band Depth composite images), and also using their elemental compositions. We find a total of five distinct spectral units from the basin floor based on the spectral properties. Our analysis suggests that the northern part which was mapped as Iltm unit (Imbrian low Ti, low Fe) by earlier researchers is actually a distinct unit, which is different in composition and age, named as Ivltm unit (Imbrian very low Ti and very low Fe). We obtain the absolute model age of 3.2 Ga with uncertainties of +0.2/ -0.5 Ga for the unit Ivltm. The newly identified basalt unit Ivltm is compositionally intermediate to the units Im and Iltm in FeO and TiO2 abundances. We find a total of five distinct spectral units from the basin floor based on the spectral properties. The units Im (Imbrian very low Ti) from southern and northern regions of the basin floor are spectrally distinct in terms of band center position and corresponding band depths but considered a single unit based on the elemental abundance analysis. The units Ivltm and Im are consistent with a high-Al basalt composition. Our detailed analysis of the entire Moscoviense basin indicates that the concentrations of orthopyroxene, olivine, and Mg-rich spinel, named as OOS rock family are widespread and dominant at the western and southern side of the middle ring of the basin with one isolated area found on the northern side of the peak ring.

Tectonic Recycling in the Paleozoic Ouachita Assemblage from U-Pb Detrital Zircon Studies

NASA Astrophysics Data System (ADS)

Gleason, J. D.; Gehrels, G. E.; Finney, S. C.

2001-05-01

The Paleozoic Ouachita deep-marine clastic sedimentary assemblage records a complex provenance over the course of its 200 m.y. history, with evidence for mixed sources and multiple dispersal paths. Combined neodymium and U-Pb detrital zircon work has established that most of the assemblage in Arkansas and Oklahoma is derived from Laurentian sources, meaning that regardless of the multiple pathways by which sediment was delivered to Ouachita seafloor, the material had its ultimate origin on the North American continent. More detailed work is in progress to elucidate specific dispersal paths, in particular for the middle to late Ordovician when a major change in provenance is recorded, and during the Carboniferous when voluminous turbidites entered the basin. We sampled three formations for U-Pb detrital zircon studies: the lower Middle Ordovician Blakely Sandstone, the Upper Ordovician/Lower Silurian Blaylock Sandstone, and the Pennsylvanian Jackfork Group. Individual zircon ages from these units document a major change in provenance between deposition of the Blakely Sandstone and Blaylock Sandstone, which is also reflected in the neodymium isotopic signature. Both units have a large population of Grenvillian-age zircons (1.0-1.2 Ga), and a less abundant population of 1.3-1.4 Ga zircons likely derived from sources in the mid-continent region. The Blakely Sandstone also contains abundant Archean zircons (2.5-2.7 Ga, likely derived from the Superior Province), and one grain apparently derived from the Penokean orogen (1.9 Ga). Zircon morphology (highly rounded, spherical), combined with the pure quartz sandstone lithology of the Blakely Sandstone, indicates very mature sedimentary sources. We conclude that zircons from this source were recycled ultimately from source terranes in the North American craton. This is reinforced by neodymium isotopes (eNd = -15), paleocurrents (from the north) and olistoliths (1.3 Ga granites), the latter indicating that Blakely turbidites were delivered to Ouachita seafloor from the North American shelf. In contrast, the Blaylock Sandstone lacks any grains older than 1.4 Ga. A single grain dated at 467 Ma (Taconian) is consistent with the primary source of the Blaylock turbidites being the southern Appalachian Mountains. This is reinforced by neodymium isotopes (eNd = -8), paleocurrent data (sources to the east-southeast), sandstone petrography (quartzolithic, indicating recycled fold-thrust belt sources), and the zircon morphology we observed (fewer rounded grains, indicating less mature sources). Sandstone from the Carboniferous Jackfork Group yields a wide spectrum of zircon ages (1.0 - 3.5 Ga), suggesting that it was derived in part by tectonic recycling of the pre-Carboniferous seafloor assemblage as the Ouachita remnant ocean basin closed between North America and Gondwana. In addition to Grenvillian-, Penokean- and Archean-age grains, there are also grains with ages of 1.4 and 1.5 Ga, all of which suggest a North American provenance. Dispersal paths for sediment entering the Carboniferous Ouachita basin are still a matter of debate, but the U-Pb zircon data are consistent with well-mixed material from the Appalachian-Ouachita orogen entering the basin from multiple directions. The preponderance of Grenvillian-age zircons in all three units reinforces the notion that sediment eroded from the Grenville orogen had widespread distribution across much of the North American continent.

Modeling the Non-Equilibrium Process of the Chemical Adsorption of Ammonia on GaN(0001) Reconstructed Surfaces Based on Steepest-Entropy-Ascent Quantum Thermodynamics.

PubMed

Kusaba, Akira; Li, Guanchen; von Spakovsky, Michael R; Kangawa, Yoshihiro; Kakimoto, Koichi

2017-08-15

Clearly understanding elementary growth processes that depend on surface reconstruction is essential to controlling vapor-phase epitaxy more precisely. In this study, ammonia chemical adsorption on GaN(0001) reconstructed surfaces under metalorganic vapor phase epitaxy (MOVPE) conditions (3Ga-H and N ad -H + Ga-H on a 2 × 2 unit cell) is investigated using steepest-entropy-ascent quantum thermodynamics (SEAQT). SEAQT is a thermodynamic-ensemble based, first-principles framework that can predict the behavior of non-equilibrium processes, even those far from equilibrium where the state evolution is a combination of reversible and irreversible dynamics. SEAQT is an ideal choice to handle this problem on a first-principles basis since the chemical adsorption process starts from a highly non-equilibrium state. A result of the analysis shows that the probability of adsorption on 3Ga-H is significantly higher than that on N ad -H + Ga-H. Additionally, the growth temperature dependence of these adsorption probabilities and the temperature increase due to the heat of reaction is determined. The non-equilibrium thermodynamic modeling applied can lead to better control of the MOVPE process through the selection of preferable reconstructed surfaces. The modeling also demonstrates the efficacy of DFT-SEAQT coupling for determining detailed non-equilibrium process characteristics with a much smaller computational burden than would be entailed with mechanics-based, microscopic-mesoscopic approaches.

Modeling the Non-Equilibrium Process of the Chemical Adsorption of Ammonia on GaN(0001) Reconstructed Surfaces Based on Steepest-Entropy-Ascent Quantum Thermodynamics

PubMed Central

Kusaba, Akira; von Spakovsky, Michael R.; Kangawa, Yoshihiro; Kakimoto, Koichi

2017-01-01

Clearly understanding elementary growth processes that depend on surface reconstruction is essential to controlling vapor-phase epitaxy more precisely. In this study, ammonia chemical adsorption on GaN(0001) reconstructed surfaces under metalorganic vapor phase epitaxy (MOVPE) conditions (3Ga-H and Nad-H + Ga-H on a 2 × 2 unit cell) is investigated using steepest-entropy-ascent quantum thermodynamics (SEAQT). SEAQT is a thermodynamic-ensemble based, first-principles framework that can predict the behavior of non-equilibrium processes, even those far from equilibrium where the state evolution is a combination of reversible and irreversible dynamics. SEAQT is an ideal choice to handle this problem on a first-principles basis since the chemical adsorption process starts from a highly non-equilibrium state. A result of the analysis shows that the probability of adsorption on 3Ga-H is significantly higher than that on Nad-H + Ga-H. Additionally, the growth temperature dependence of these adsorption probabilities and the temperature increase due to the heat of reaction is determined. The non-equilibrium thermodynamic modeling applied can lead to better control of the MOVPE process through the selection of preferable reconstructed surfaces. The modeling also demonstrates the efficacy of DFT-SEAQT coupling for determining detailed non-equilibrium process characteristics with a much smaller computational burden than would be entailed with mechanics-based, microscopic-mesoscopic approaches. PMID:28809816

Mitigating Structural Defects in Droop-Minimizing InGaN/GaN Quantum Well Heterostructures

DOE Office of Scientific and Technical Information (OSTI.GOV)

Zhao, Zhibo; Chesin, Jordan; Singh, Akshay

2016-12-01

Modern commercial InGaN/GaN blue LEDs continue to suffer from efficiency droop, a reduction in efficiency with increasing drive current. External quantum efficiency (EQE) typically peaks at low drive currents (< 10 A cm 2) and drops monotonically at higher current densities, falling to <85% of the peak EQE at a drive current of 100 A cm 2. Mitigating droop-related losses will yield tremendous gains in both luminous efficacy (lumens/W) and cost (lumens/$). Such improvements are critical for continued large-scale market penetration of LED technologies, particularly in high-power and high flux per unit area applications. However, device structures that reduce droopmore » typically require higher indium content and are accompanied by a corresponding degradation in material quality which negates the droop improvement via enhanced Shockley-Read-Hall (SRH) recombination. In this work, we use advanced characterization techniques to identify and classify structural defects in InGaN/GaN quantum well (QW) heterostructures that share features with low-droop designs. Using aberration-corrected scanning transmission electron microscopy (C s-STEM), we find the presence of severe well width fluctuations (WWFs) in a number of low droop device architectures. However, the presence of WWFs does not correlate strongly with external quantum efficiency nor defect densities measured via deep level optical spectroscopy (DLOS). Hence, performance losses in the heterostructures of interest are likely dominated by nanoscale point or interfacial defects rather than large-scale extended defects.« less

Structural analysis and implicit 3D modelling of high-grade host rocks to the Venetia kimberlite diatremes, Central Zone, Limpopo Belt, South Africa

NASA Astrophysics Data System (ADS)

Basson, I. J.; Creus, P. K.; Anthonissen, C. J.; Stoch, B.; Ekkerd, J.

2016-05-01

The Beit Bridge Complex of the Central Zone (CZ) of the Limpopo Belt hosts the 519 ± 6 Ma Venetia kimberlite diatremes. Deformed shelf- or platform-type supracrustal sequences include the Mount Dowe, Malala Drift and Gumbu Groups, comprising quartzofeldspathic units, biotite-bearing gneiss, quartzite, metapelite, metacalcsilicate and ortho- and para-amphibolite. Previous studies define tectonometamorphic events at 3.3-3.1 Ga, 2.7-2.5 Ga and 2.04 Ga. Detailed structural mapping over 10 years highlights four deformation events at Venetia. Rules-based implicit 3D modelling in Leapfrog Geo™ provides an unprecedented insight into CZ ductile deformation and sheath folding. D1 juxtaposed gneisses against metasediments. D2 produced a pervasive axial planar foliation (S2) to isoclinal F2 folds. Sheared lithological contacts and S2 were refolded into regional, open, predominantly southward-verging, E-W trending F3 folds. Intrusion of a hornblendite protolith occurred at high angles to incipient S2. Constrictional-prolate D4 shows moderately NE-plunging azimuths defined by elongated hornblendite lenses, andalusite crystals in metapelite, crenulations in fuchsitic quartzite and sheath folding. D4 overlaps with a: 1) 2.03-2.01 Ga regional M3 metamorphic overprint; b) transpressional deformation at 2.2-1.9 Ga and c) 2.03 Ga transpressional, dextral shearing and thrusting around the CZ and d) formation of the Avoca, Bellavue and Baklykraal sheath folds and parallel lineations.

Remedial Investigation Report, Operable Unit 3 - Upland Soils, LCP Chemicals Site, Brunswick, Georgia

EPA Pesticide Factsheets

February 2013 report on the current site conditions and a summary of human and ecological risk assessments of the LCP Chemicals Superfund Site, GA. Region ID : 04, DocID: 10925336 , DocDate: 2013-02-01

Physics Notes.

ERIC Educational Resources Information Center

School Science Review, 1978

1978-01-01

Discusses some high school physics demonstrations and experiments on a variety of topics: such as uses of the dipole, the vapour-liquid critical point, velocity of sound in metallic rods, the flux-density near a bar magnet, and a different style logic gate using basic units. (GA)

Work Plan for Site-Wide Assessment for Petroleum Product (Operable Unit 2) May 2012

EPA Pesticide Factsheets

May 2012 redlined plan assessment of light non-aqueous phase liquid (LNAPL) petroleum product potentially present at the LCP Chemicals Superfund Site, GA. Region ID: 04 DocID: 10922562, DocDate: 05-09-2012

Remedial Investigation Report, Operable Unit One - Estuary, LCP Chemicals Site, Brunswick, Georgia

EPA Pesticide Factsheets

October 2012 report on the nature and spatial distribution of chemicals of concern (COCs) in the estuarine sediments of the LCP Chemicals Superfund Site, GA. Region ID : 04, DocID: 10922973 , DocDate: 2012-10-01

Tectonic and sedimentary linkages between the Belt-Purcell basin and southwestern Laurentia during the Mesoproterozoic ca. 1.60-1.40 Ga

USGS Publications Warehouse

Jones, James V.; Dainel, Christohper G; Doe, Michael F

2015-01-01

Mesoproterozoic sedimentary basins in western North America provide key constraints on pre-Rodinia craton positions and interactions along the western rifted margin of Laurentia. One such basin, the Belt-Purcell basin, extends from southern Idaho into southern British Columbia and contains a >18-km-thick succession of siliciclastic sediment deposited ca. 1.47–1.40 Ga. The ca. 1.47–1.45 Ga lower part of the succession contains abundant distinctive non-Laurentian 1.61–1.50 Ga detrital zircon populations derived from exotic cratonic sources. Contemporaneous metasedimentary successions in the southwestern United States–the Trampas and Yankee Joe basins in Arizona and New Mexico–also contain abundant 1.61–1.50 Ga detrital zircons. Similarities in depositional age and distinctive non-Laurentian detrital zircon populations suggest that both the Belt-Purcell and southwestern successions record sedimentary and tectonic linkages between western Laurentia and one or more cratons including North Australia, South Australia, and (or) East Antarctica. At ca. 1.45 Ga, both the Belt-Purcell and southwest successions underwent major sedimentological changes, with a pronounced shift to Laurentian provenance and the disappearance of the 1.61–1.50 Ga detrital zircon. Upper Belt-Purcell strata contain strongly unimodal ca. 1.73 Ga detrital zircon age populations that match the detrital zircon signature of Paleoproterozoic metasedimentary rocks of the Yavapai province to the south and southeast. We propose that the shift at ca. 1.45 Ga records the onset of orogenesis in southern Laurentia coeval with rifting along its northwestern margin. Bedrock uplift associated with orogenesis and widespread, coeval magmatism caused extensive exhumation and erosion of the Yavapai province ca. 1.45–1.36 Ga, providing a voluminous and areally extensive sediment source–with suitable zircon ages–during upper Belt deposition. This model provides a comprehensive and integrated view of the Mesoproterozoic tectonic evolution of western Laurentia and its position within the supercontinent Columbia as it evolved into Rodinia.

Generation of continental crust in the northern part of the Borborema Province, northeastern Brazil, from Archaean to Neoproterozoic

NASA Astrophysics Data System (ADS)

de Souza, Zorano Sérgio; Kalsbeek, Feiko; Deng, Xiao-Dong; Frei, Robert; Kokfelt, Thomas Find; Dantas, Elton Luiz; Li, Jian-Wei; Pimentel, Márcio Martins; Galindo, Antonio Carlos

2016-07-01

This work deals with the origin and evolution of the magmatic rocks in the area north of the Patos Lineament in the Borborema Province (BP). This northeastern segment of NE Brazil is composed of at least six different tectonic blocks with ages varying from late-Archaean to late-Palaeoproterozoic. Archaean rocks cover ca. 5% of the region. They were emplaced over a period of 700 Ma, with at least seven events of magma generation, at 3.41, 3.36, 3.25, 3.18, 3.12, 3.03, and 2.69 Ga. The rocks are subalkaline to slightly alkaline, with affinity to I- and M-type magmas; they follow trondhjemitic or potassium calc-alkaline differentiation trends. They have epsilon Nd(t) of +1.4 to -4.2 and negative anomalies for Ta-Nb, P and Ti, consistent with a convergent tectonic setting. Both subducted oceanic crust and upper mantle (depleted or metasomatised) served as sources of the magmas. After a time lapse of about 350 m y., large-scale emplacement of Paleoproterozoic units took place. These rocks cover about 50% of the region. Their geochemistry indicates juvenile magmatism with a minor contribution from crustal sources. These rocks also exhibit potassic calc-alkaline differentiation trends, again akin to I- and M-type magmas, and show negative anomalies for Ta-Nb, Ti and P. Depleted and metasomatised mantle, resulting from interaction with adakitic or trondhjemitic melts in a subduction zone setting, is interpreted to be the main source of the magmas, predominanting over crustal recycling. U-Pb ages indicate generation of plutonic rocks at 2.24-2.22 Ga (in some places at about 2.4-2.3 Ga) and 2.13-2.11 Ga, and andesitic volcanism at 2.15 Ga. Isotopic evidence indicates juvenile magmatism (epsilon Nd(t) of +2.9 to -2.9). After a time lapse of about 200 m y. a period of within-plate magmatic activity followed, with acidic volcanism (1.79 Ga) in Orós, granitic plutonism (1.74 Ga) in the Seridó region, anorthosites (1.70 Ga) and A-type granites (1.6 Ga) in the Transverse Zone (TZ). Early Neoproterozoic volcanism at 1091 Ma, and A-type plutonism, from 920 to 775 Ma, mark the intracontinental magmatism in the TZ. In the Seridó Domain, the Late Neoproterozoic registers several events of plutonism, at 600-593, 575-560, 548-533, 528-510, 495-450 Ma. These rocks cover ca. 15% of the area, while Neoproterozoic supracrustal rocks cover ca. 30%. The most important magmatic event is that at 575 Ma, consistent with the peak of widespread transpression and synchronous high temperature metamorphism. The Neoproterozoic rocks are mostly K-enriched alkaline or transitional to calc-alkaline. Inherited Archaean and Palaeoproterozoic zircons and Nd model ages, as well as moderate to strongly negative (-21 to -9) epsilon Nd, and persistent negative anomalies for Ta-Nb, Ti and P indicate significant crustal contributions in their genesis. While a convergent setting (subduction zone) could explain the Archaean and Palaeoproterozoic units, this is not so for the Neoproterozoic rocks which mimic the geochemical and isotopic features of the older sources. In the study area, the peak of juvenile accretion (mantle derived magmas) took place in the Archaean (3.4-2.7 Ga) and Palaeproterozoic (2.4-2.11 Ga), whereas crustal recycling predominated in the Neoproterozoic.

A GaAs vector processor based on parallel RISC microprocessors

NASA Astrophysics Data System (ADS)

Misko, Tim A.; Rasset, Terry L.

A vector processor architecture based on the development of a 32-bit microprocessor using gallium arsenide (GaAs) technology has been developed. The McDonnell Douglas vector processor (MVP) will be fabricated completely from GaAs digital integrated circuits. The MVP architecture includes a vector memory of 1 megabyte, a parallel bus architecture with eight processing elements connected in parallel, and a control processor. The processing elements consist of a reduced instruction set CPU (RISC) with four floating-point coprocessor units and necessary memory interface functions. This architecture has been simulated for several benchmark programs including complex fast Fourier transform (FFT), complex inner product, trigonometric functions, and sort-merge routine. The results of this study indicate that the MVP can process a 1024-point complex FFT at a speed of 112 microsec (389 megaflops) while consuming approximately 618 W of power in a volume of approximately 0.1 ft-cubed.

Lightweight Solar Paddle with High Specific Power of 150 W/Kg

NASA Astrophysics Data System (ADS)

Shimazaki, Kazunori; Takahashi, Masato; Imaizumi, Mitsuru; Takamoto, Tatsuya; Ito, Takehiko; Nozaki, Yukishige; Kusawake, Hiroaki

2014-08-01

A lightweight solar paddle using space solar sheet (SSS) is currently being developed, which uses glass-type SSS (G-SSS) comprising InGaP/GaAs/InGaAs triple- junction high-efficiency thin-film solar cells. To avoid damage to the G-SSS due to vibration during launch, we adopted a new architecture on a panel. This panel employed a curved frame-type structure, on which the G-SSS is mounted and test models were manufactured to evaluate the vibration tolerance. The dimensions of the 1.0-cm-thick unit panel were about 1.0 × 1.0 m. Acoustic and sine vibration tests were performed on the model and the results demonstrated the high durability of the curved panel in an acoustic and vibration environments. The specific power of the solar paddle using the curved panel is estimated at approximately 150 W/kg at an array power of about 10 kW.

Measurements of SWIR backgrounds using the swux unit of measure

NASA Astrophysics Data System (ADS)

Richards, A.; Hübner, M.; Vollmer, M.

2018-04-01

The SWIR waveband between 0.8μm-1.8μm is getting increasingly exploited by imaging systems in a variety of different applications, including persistent imaging for security and surveillance of high-value assets, handheld tactical imagers, range-gated imaging systems and imaging LADAR for driverless vehicles. The vast majority of these applications utilize lattice-matched InGaAs detectors in their imaging sensors, and these sensors are rapidly falling in price, leading to their widening adoption. As these sensors are used in novel applications and locations, it is important that ambient SWIR backgrounds be understood and characterized for a variety of different field conditions, primarily for the purposes of system performance modeling of SNR and range metrics. SWIR irradiance backgrounds do not consistently track visible-light illumination at all. There is currently little of this type of information in the open literature, particularly measurements of SWIR backgrounds in urban areas, natural areas, or indoors. This paper presents field measurements done with an InGaAs detector calibrated in the swux unit of InGaAs-band-specific irradiance proposed by two of the authors in 2017. Simultaneous measurements of illuminance levels (in lux) at these sites are presented, as well as visible and InGaAs camera images of the scenery at some of these measurement sites. The swux and lux measurement hardware is described, along with the methods used to calibrate it. Finally, the swux levels during the partial and total phases of the total solar eclipse of 2017 are presented, along with curves fitted to the data from a theoretical model, based on obscuration of the sun by the moon. The apparent differences between photometric and swux measurements will be discussed.

Electroencephalographic activity in response to procedural pain in preterm infants born at 28 and 33 weeks gestational age.

PubMed

Maimon, Neta; Grunau, Ruth E; Cepeda, Ivan L; Friger, Michael; Selnovik, Leonel; Gilat, Shlomo; Shany, Eilon

2013-12-01

Preterm infants undergo frequent painful procedures in the neonatal intensive care unit. Electroencephalography (EEG) changes in reaction to invasive procedures have been reported in preterm and full-term neonates. Frontal EEG asymmetry as an index of emotion during tactile stimulation shows inconsistent findings in full-term infants, and has not been examined in the context of pain in preterm infants. Our aim was to examine whether heel lance for blood collection induces changes in right-left frontal asymmetry, suggesting negative emotional response, in preterm neonates at different gestational age (GA) at birth and different duration of stay in the neonatal intensive care unit. Three groups of preterm infants were compared: set 1: group 1 (n=24), born and tested at 28 weeks GA; group 2 (n=22), born at 28 weeks GA and tested at 33 weeks; set 2: group 3 (n=25), born and tested at 33 weeks GA. EEG power was calculated for 30-second artifact-free periods, in standard frequency bandwidths, in 3 phases (baseline, up to 5 min after heel lance, 10 min after heel lance). No significant differences were found in right-left frontal asymmetry, or in ipsilateral or contralateral somatosensory response, across phases. In contrast, the Behavioral Indicators of Infant Pain scores changed across phase (P<0.0001). Infants in group 1 showed lower Behavioral Indicators of Infant Pain scores (P=0.039). There are technical challenges in recording EEG during procedures, as pain induces motor movements. More research is needed to determine the most sensitive approach to measure EEG signals within the context of pain in infancy.

Geochemical provenance of Florida basement components

DOE Office of Scientific and Technical Information (OSTI.GOV)

Heatherington, A.L.; Mueller, P.A.; Dallmeyer, R.D.

1993-03-01

The pre-Cretaceous basement of Florida is generally considered to be exotic with respect to Proterozoic Laurentia. Paleontologic and paleomagnetic evidence have suggested a Gondwanan provenance for the Floridan basement, as either a peri-Gondwanide terrane or as a rifted block of the West African craton. The report of generally similar lithologic sequences and a record of similar Ar-Ar cooling ages in some Floridan and West African lithologic units has led to very specific correlations between these units. U-Pb, Sm-Nd, and Rb-Sr geochronologic studies as well as isotopic and elemental abundance data have been used to evaluate the validity of these correlations.more » Results indicate: (1) geochemical similarities between volcanic rocks of northeastern Florida and a Pan-African metavolcanic sequence (Niokola-Koba group) exposed in Senegal; (2) an absence of a Grenvillian-age (i.e., Laurentian) component in zircons separated from a Paleozoic Suwanee basin sandstone; and (3) whole-rock Sm-Nd and U-Pb zircon evidence for an Archean ([approximately]3.0 Ga) component in the neo-Proterozoic Osceola granitoid(s). Although silicic rocks from throughout Florida have Nd model ages (T[sub DM]) that are predominantly Grenvillian (1.1--1.4 Ga), the absence of a Grenvillian component in zircons separated from granite and sandstone suggests that the model ages represent a mixture of older and younger components. Overall, the evidence for Birimian ([approximately]2.1 Ga) and Liberian ([approximately]3.0 Ga) age components in the Florida basement are consistent with its origin as a rifted block of cratonic Gondwana. In addition to demonstrating a strong affinity between the Florida basement and cratonic West Africa/northern South America, these data provide a basis for comparison with other circum-Atlantic terranes traditionally described as Avalonian/Cadomian, etc.« less

Estimating gestational age at birth from fundal height and additional anthropometrics: a prospective cohort study.

PubMed

Pugh, S J; Ortega-Villa, A M; Grobman, W; Newman, R B; Owen, J; Wing, D A; Albert, P S; Grantz, K L

2018-02-23

Accurate assessment of gestational age (GA) is critical to paediatric care, but is limited in developing countries without access to ultrasound. Our objectives were to assess the accuracy of prediction of GA at birth and preterm birth classification using routinely collected anthropometry measures. Prospective cohort study. United States. A total of 2334 non-obese and 468 obese pregnant women. Enrolment GA was determined based on last menstrual period, confirmed by first-trimester ultrasound. Maternal anthropometry and fundal height (FH) were measured by a standardised protocol at study visits; FH alone was additionally abstracted from medical charts. Neonatal anthropometry measurements were obtained at birth. To estimate GA at delivery, we developed three predictor models using longitudinal FH alone and with maternal and neonatal anthropometry. For all predictors, we repeatedly sampled observations to construct training (60%) and test (40%) sets. Linear mixed models incorporated longitudinal maternal anthropometry and a shared parameter model incorporated neonatal anthropometry. We assessed models' accuracy under varied scenarios. Estimated GA at delivery. Prediction error for various combinations of anthropometric measures ranged between 13.9 and 14.9 days. Longitudinal FH alone predicted GA within 14.9 days with relatively stable prediction errors across individual race/ethnicities [whites (13.9 days), blacks (15.1 days), Hispanics (15.5 days) and Asians (13.1 days)], and correctly identified 75% of preterm births. The model was robust to additional scenarios. In low-risk, non-obese women, longitudinal FH measures alone can provide a reasonably accurate assessment of GA when ultrasound measures are not available. Longitudinal fundal height alone predicts gestational age at birth when ultrasound measures are unavailable. © 2018 Royal College of Obstetricians and Gynaecologists.

Influence of gestational age on dead space and alveolar ventilation in preterm infants ventilated with volume guarantee.

PubMed

Neumann, Roland P; Pillow, Jane J; Thamrin, Cindy; Larcombe, Alexander N; Hall, Graham L; Schulzke, Sven M

2015-01-01

Ventilated preterm infant lungs are vulnerable to overdistension and underinflation. The optimal ventilator-delivered tidal volume (VT) in these infants is unknown and may depend on the extent of alveolarisation at birth. We aimed to calculate respiratory dead space (VD) from the molar mass (MM) signal of an ultrasonic flowmeter (VD,MM) in very preterm infants on volume-targeted ventilation (VT target, 4-5 ml/kg) and to study the association between gestational age (GA) and VD,MM-to-VT ratio (VD,MM/VT), alveolar tidal volume (VA) and alveolar minute volume (AMV). This was a single-centre, prospective, observational, cohort study in a neonatal intensive care unit. Tidal breathing analysis was performed in ventilated very preterm infants (GA range 23-32 weeks) on day 1 of life. Valid measurements were obtained in 43/51 (87%) infants. Tidal breathing variables were analysed using multivariable linear regression. VD,MM/VT was negatively associated with GA after adjusting for birth weight Z score (p < 0.001, R(2) = 0.26). This association was primarily influenced by the appliance dead space. Despite similar VT/kg and VA/kg across all studied infants, respiratory rate and AMV/kg increased with GA. VD,app rather than anatomical VD is the major factor influencing increased VD,MM/VT at a younger GA. A volume guarantee setting of 4-5 ml/kg in the Dräger Babylog® 8000 plus ventilator may be inappropriate as a universal target across the GA range of 23-32 weeks. Differences between measured and set VT and the dependence of this difference on GA require further investigation. © 2014 S. Karger AG, Basel.

Is segmental epidural anaesthesia an optimal technique for patients undergoing percutaneous nephrolithotomy?

PubMed Central

Parikh, Devangi A; Patkar, Geeta A; Ganvir, Mayur S; Sawant, Ajit; Tendolkar, Bharati A

2017-01-01

Background and Aims: Neuraxial anaesthesia has recently become popular for percutaneous nephrolithotomy (PCNL). We conducted a study comparing general anaesthesia (GA) with segmental (T6–T12) epidural anaesthesia (SEA) for PCNL with respect to anaesthesia and surgical characteristics. Methods: Ninety American Society of Anesthesiologists Physical Status-I and II patients undergoing PCNL randomly received either GA or SEA. Overall patient satisfaction was the primary end point. Intraoperative haemodynamics, epidural block characteristics, post-operative pain, time to rescue analgesic, total analgesic consumption, discharge times from post-anaesthesia care unit, surgeon satisfaction scores and stone clearance were secondary end points. Parametric data were analysed by Student's t-test while non-parametric data were compared with Mann–Whitney U-test. Results: Group SEA reported better patient satisfaction (P = 0.005). Patients in group GA had significantly higher heart rates (P = 0.0001) and comparable mean arterial pressures (P = 0.24). Postoperatively, time to first rescue analgesic and total tramadol consumption was higher in Group GA (P = 0.001). Group SEA had lower pain scores (P = 0.001). Time to reach Aldrete's score of 9 was shorter in group SEA (P = 0.0001). The incidence of nausea was higher in group GA (P = 0.001); vomiting rates were comparable (P = 0.15). One patient in group SEA developed bradycardia which was successfully treated. Eight patients (18%) had hypertensive episodes in group GA versus none in group SEA (P = 0.0001). One patient in GA group had pleural injury and was managed with intercostal drain. Stone clearance and post-operative haemoglobin levels were comparable in both groups. Conclusion: PCNL under SEA has a role in selected patients, for short duration surgery and in expert hands. PMID:28515518

Deep sedation versus general anesthesia in percutaneous edge-to-edge mitral valve reconstruction using the MitraClip system.

PubMed

de Waha, Suzanne; Seeburger, Joerg; Ender, Joerg; Desch, Steffen; Eitel, Ingo; Reinhardt, Adrian; Pöss, Janine; Fuernau, Georg; Noack, Thilo; Merk, Denis Rouven; Schuler, Gerhard; Sievers, Hans-Hinrich; Mohr, Friedrich-Wilhelm; Thiele, Holger

2016-06-01

Percutaneous edge-to-edge mitral valve reconstruction (PMVR) has emerged as a treatment option in patients with severe mitral regurgitation not considered suitable candidates for surgery. The majority of PMVR procedures are performed under general anesthesia (GA), although deep sedation (DS) appears to be an attractive alternative. We thus sought to assess the impact on intensive care unit (ICU) length of stay, efficacy, and safety of DS in comparison to GA in patients undergoing PMVR using the MitraClip(®) system. Sixty consecutive patients underwent PMVR procedures at two centers. The first 30 patients were treated by GA followed by 30 patients undergoing DS under different settings. The primary clinical endpoint was ICU length of stay. The primary efficacy endpoint included procedural success and procedural duration. The safety endpoint was defined as a composite of death, stroke, cardiogenic shock, moderate and severe bleeding as well as pneumonia. The ICU length of stay was significantly shorter in the DS group in comparison to GA patients (p = 0.001). The hospital length of stay did not differ following DS in comparison to GA (p = 0.96). Procedural success was high in both groups (100 versus 96.7 %, p = 0.34) at similar procedural duration time (p = 0.60). No difference between GA and DS was observed with respect to the occurrence of the combined safety endpoint (p = 0.47). In comparison to GA, DS reduces the ICU length of stay in PMVR without negative effects on safety and efficacy. Prospective randomized trials are needed to confirm these findings.

Paravertebral blocks reduce the risk of postoperative urinary retention in inguinal hernia repair.

PubMed

Bojaxhi, E; Lee, J; Bowers, S; Frank, R D; Pak, S H; Rosales, A; Padron, S; Greengrass, R A

2018-06-16

Inguinal hernia repair and general anesthesia (GA) are known risk factors for urinary retention. Paravertebral blocks (PVBs) have been utilized to facilitate enhanced recovery after surgery. We evaluate the benefit of incorporating PVBs into our anesthetic technique in a large cohort of ambulatory patients undergoing inguinal hernia repair. Records of 619 adults scheduled for ambulatory inguinal hernia repair between 2010 and 2015 were reviewed and categorized based on anesthetic and surgical approach [GA and open (GAO), GA and laparoscopic (GAL), PVB and open (PVBO), and GA/PVB and open (GA/PVBO)]. Patients were excluded for missing data, self-catheterization, chronic opioid tolerance, and additional surgical procedures coinciding with hernia repair. Risk factors associated with the primary outcome of urinary retention were examined using logistic regression. PVBO (n = 136) had significantly lower odds than GAO of experiencing urinary retention (odds ratio 0.16; 95% CI 0.05-0.51); overall (P < .01), with 4.4% (n = 6) of the patients in the PVBO group having urinary retention versus 22.6% (n = 7) with GAO. Expressed as intravenous morphine equivalences, the PVBO group had the lowest median opioid use (5 mg), followed by GA, PVB, and open (7.5 mg); GAO 25 mg; and GAL 25 mg. Also, 30% (n = 41) of the PVBO group required no opioid analgesia in the postanesthesia care unit. PVBs as the primary anesthetic or an adjunct to GA is the preferred anesthetic technique for open inguinal hernia repair as it facilitates enhanced recovery after surgery by decreasing risk of urinary retention, opioid requirements, and length of stay.

Comparative Evaluation of the Antimicrobial Efficacy of Three Immersion Chemical Disinfectants on Clinically Derived Poly(Vinyl Siloxane) Impressions.

PubMed

Jeyapalan, Vidhya; Krishnan, Chitra Shankar; Ramasubramanian, Hariharan; Sampathkumar, Jayakrishnakumar; Azhagarasan, N S; Krishnan, Madhusudan

2016-07-06

To comparatively evaluate the antimicrobial efficacy of freshly prepared electrolyzed oxidizing water (EOW) with that of 2.4% glutaraldehyde (GA) and 1% sodium hypochlorite (SH) on clinically derived poly vinyl siloxane (PVS) impressions. Four clinically derived PVS impressions each were obtained from 10 subjects. One impression from each subject was randomly kept as control (group I), without disinfection. The remaining three impressions were randomly disinfected by immersion in either 2.4% GA (group II), 1% SH (group III), or freshly prepared EOW (group IV). The samples were subjected to microbial culture individually on brain heart infusion (BHI) agar medium. The organisms isolated were confirmed by visual examination and gram staining. Mean colony forming units (CFU) were counted, log 10 reduction obtained and compared. Data were statistically analyzed using one-way ANOVA, followed by multiple comparisons using Tukey-HSD post hoc tests (p < 0.05). Streptococci, Staphylococci, Pseudomonas, Candida, Proteus, Klebsiella, and E. coli were isolated from all impressions including the controls, except those disinfected by EOW. All three disinfectants showed significant reduction in CFU and log 10 reduction values as compared to the controls. EOW showed significantly higher reduction in log 10 values compared to GA and SH, whereas GA and SH showed similar reductions. EOW, GA, and SH showed kill rates of 100%, 99.60%, and 99.82%, respectively. EOW showed significant antimicrobial efficacy as evidenced by reduction in log 10 values when used as an immersion disinfectant for PVS impressions when compared with the results obtained using GA and SH. These results need further investigation. EOW shows high antimicrobial efficacy when used as an immersion disinfectant as compared to GA and SH for clinically derived PVS impressions. © 2016 by the American College of Prosthodontists.

KSC-06pd1489

NASA Image and Video Library

2006-07-04

KENNEDY SPACE CENTER, FLA. - From Firing Room 4 of the Launch Control Center, NASA Administrator Mike Griffin uses binoculars to view of the launch of Space Shuttle Discovery (in the background) on mission STS-121. The launch made history as the first to occur on Independence Day. Liftoff was on-time at 2:38 p.m. EDT. During the 12-day mission, the STS-121 crew of seven will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Landing is scheduled for July 16 or 17 at Kennedy's Shuttle Landing Facility. Photo credit: NASA/Bill Ingalls

KSC-2012-4399

NASA Image and Video Library

2012-08-14

CAPE CANAVERAL, Fla. -- National Space Club Florida Committee Chair Steve Griffin, left, Florida's Lt. Gov. Jennifer Carroll, and NASA Commercial Crew Program Manager Ed Mango pose for a photo at the club's August luncheon at the Radisson Resort at the Port in Cape Canaveral, Fla. Mango was the event's guest speaker, discussing the innovative steps the agency is taking with industry partners to develop the next U.S. space transportation capability to and from low Earth orbit, which will eventually be available for use by the U.S. government and other commercial customers. To learn more about the Commercial Crew Program, visit www.nasa.gov/commercialcrew. Photo credit: Kim Shiflett

President Richard Nixon visits MSC to award Apollo 13 Mission Operations team

NASA Image and Video Library

1970-04-18

S70-35600 (18 April 1970) --- President Richard M. Nixon introduces Sigurd A. Sjoberg (far right), director of Flight Operations at Manned Spacecraft Center, and the four Apollo 13 flight directors during the President?s post-mission visit to the Manned Spacecraft Center. The flight directors are, from left to right, Glynn S. Lunney, Eugene A. Kranz, Gerald D. Griffin and Milton L. Windler. Dr. Thomas O. Paine, Administrator, National Aeronautics and Space Administration, is seated at left. President Nixon was on the site to present the Presidential Medal of Freedom - the nation?s highest civilian honor -to the Apollo 13 Mission Operations Team.

Introduction to HACCP.

USDA-ARS?s Scientific Manuscript database

Introduction to HACCP Deana R. Jones, Ph.D. Egg Safety and Quality Research Unit USDA-Agricultural Research Service Russell Research Center Athens, GA Deana.Jones@ars.usda.gov HACCP is an acronym for Hazard Analysis and Critical Control Point and was initially developed by the Pillsbury Company a...

48 CFR 9904.410-40 - Fundamental requirement.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 48 Federal Acquisition Regulations System 7 2010-10-01 2010-10-01 false Fundamental requirement..., OFFICE OF FEDERAL PROCUREMENT POLICY, OFFICE OF MANAGEMENT AND BUDGET PROCUREMENT PRACTICES AND COST ACCOUNTING STANDARDS COST ACCOUNTING STANDARDS 9904.410-40 Fundamental requirement. (a) Business unit G&A...

1. VIEW OF NORTHEAST FRONT (GABLE END) FROM THORNE AVENUE, ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. VIEW OF NORTHEAST FRONT (GABLE END) FROM THORNE AVENUE, FACING NORTHWEST. (BUILDINGS 114 AND 118 ARE VISIBLE IN THE BACKGROUND.) - Fort McPherson, World War II Station Hospital, G. U. Treatment Unit Dispensary, Thorne Avenue, Atlanta, Fulton County, GA

DOE Office of Scientific and Technical Information (OSTI.GOV)

Iyer, Abishek K.; Rudyk, Brent W.; Lin, Xinsong

The quaternary rare-earth chalcogenides RE{sub 3}CuGaS{sub 7} and RE{sub 3}CuGaSe{sub 7} (RE=La–Nd) have been prepared by reactions of the elements at 1050 °C and 900 °C, respectively. They crystallize in the noncentrosymmetric La{sub 3}CuSiS{sub 7}-type structure (hexagonal, space group P6{sub 3}, Z=2) in which the a-parameter is largely controlled by the RE component (a=10.0–10.3 Å for the sulfides and 10.3–10.6 Å for the selenides) whereas the c-parameter is essentially fixed by the choice of Ga and chalcogen atoms within tetrahedral units (c=6.1 Å for the sulfides and 6.4 Å for the selenides). They extend the series RE{sub 3}MGaCh{sub 7}, previouslymore » known for divalent metal atoms (M=Mn–Ni), differing in that the Cu atoms in RE{sub 3}CuGaCh{sub 7} occupy trigonal planar sites instead of octahedral sites. Among quaternary chalcogenides RE{sub 3}MM′Ch{sub 7}, the combination of monovalent (M=Cu) and trivalent (M′=Ga) metals is unusual because it appears to violate the condition of charge balance satisfied by most La{sub 3}CuSiS{sub 7}-type compounds. The possibility of divalent Cu atoms was ruled out by bond valence sum analysis, magnetic measurements, and X-ray photoelectron spectroscopy. The electron deficiency in RE{sub 3}CuGaCh{sub 7} is accommodated through S-based holes at the top of the valence band, as shown by band structure calculations on La{sub 3}CuGaS{sub 7}. An optical band gap of about 2.0 eV was found for La{sub 3}CuGaSe{sub 7}. - Graphical abstract: The chalcogenides RE{sub 3}CuGaCh{sub 7} contain monovalent Cu in trigonal planes and trivalent Ga in tetrahedra; they are electron-deficient representatives of La{sub 3}CuSiS{sub 7}-type compounds, which normally satisfy charge balance. - Highlights: • Quaternary chalcogenides RE{sub 3}CuGaCh{sub 7} (RE=La–Nd; Ch=S, Se) were prepared. • Bond valence sums, magnetism, and XPS data give evidence for monovalent Cu. • Crystal structures reveal high anisotropy of Cu displacement. • Electron deficiency is accommodated by S-based holes in valence band.« less

Gene polymorphisms of tumor necrosis factor alpha-308 and interleukin-10-1082 among asthmatic Egyptian children.

PubMed

Zedan, Magdy; Settin, Ahmed; Farag, Mohammad K; El-Bayoumi, Mohammed; El Regal, Mohammed Ezz; El Baz, Rizk; Osman, Engy

2008-01-01

Tumor necrosis factor (TNF) alpha-308 and interleukin (IL)-10(-1082) have potent inflammatory responses in the process of airway inflammation in asthma. The purpose of this study was to check for association of polymorphisms related to cytokine genes with susceptibility and severity of bronchial asthma in Egyptian children. Blood samples of 69 asthmatic children receiving treatment and follow-up at the Allergy and Respiratory Medicine Unit, Mansoura University Children Hospital, Mansoura, Egypt, were subjected to DNA extraction and amplification using polymerase chain reaction with sequence-specific primers for detection of single nucleotide polymorphisms in the promoter regions of cytokine genes TNF-alpha(-308(G-->A)), IL-10(-1082(G-->A)). Compared with normal controls, Egyptian asthmatic children showed a significant higher frequency of IL-10(-1082) G/G homozygosity genotype (p < 0.001; odds ratio [OR] = 7) with lower frequency of G/A heterozygosity genotype among cases. This finding also was detected in cases with persistent asthma and eczema. These cases showed significant lower frequency of TNF-alpha-308 G/A heterozygosity (p < 0.05; OR = 0.44). Also, male cases, cases with positive family history, and those patients with persistent types of asthma showed a higher frequency of TNF-alpha-308 G/G homozygosity. IL-10(-1082(G-->A)) G/G and TNF-alpha-308(G-->A) G/G may be a contributing factor in susceptibility as well as severity of asthma among Egyptian children. Separate studies should be specified relating these cytokine genotypes to response to various modalities in asthma therapy. This study reports that IL-10(-1082(G-->A)) G/G and TNF-alpha-308(G-->A) G/G genotypes may be contributing factors in susceptibility as well as in severity of asthma among Egyptian children. Separate studies may be specified relating these cytokine genotypes to response to various modalities in asthma therapy.

Proterozoic events recorded in quartzite cobbles at Jack Hills, Western Australia: New constraints on sedimentation and source of > 4 Ga zircons

NASA Astrophysics Data System (ADS)

Grange, Marion L.; Wilde, Simon A.; Nemchin, Alexander A.; Pidgeon, Robert T.

2010-03-01

Rare heavy mineral bands within quartzite cobbles were identified in two conglomerate units within the Jack Hills belt, Western Australia. Seven zircon-bearing cobbles were analysed from one location (site 152) and three from another (site 154), both approximately 1 km west of the site where zircons in excess of 4 Ga are abundant (W74 'discovery' site). Individual pebbles from the 152 site reveal three distinctive features, containing either zircons > 3.0 Ga in age, < 1.9 Ga in age or a range of ages from ˜ 1.2 to ˜ 3.6 Ga. Those from site 154 are more uniform, containing only zircons with ages between 3.1 and 3.9 Ga. Only one grain > 4 Ga was discovered from the entire suite of pebbles, in contrast to the well-studied W74 site. A single detrital zircon with an age of 1220 ± 42 Ma from location 152 is the youngest grain so far reported from sedimentary rocks at Jack Hills. It shows magmatic oscillatory zoning and thus implies at least two sedimentary cycles within the Proterozoic; requiring erosion of an igneous precursor, incorporation into a clastic sediment, induration and subsequent erosion and transport to be hosted in the conglomerate. The nearest source for rocks of this age is the Bangemall Supergroup in the Collier Basin, ˜ 100 km northeast in the Capricorn Orogen. This would imply tectonic interleaving of originally more extensive Bangemall rocks, possibly related to activity along the Cargarah Shear Zone that traverses the Jack Hills belt. The lack of > 4.1 Ga zircons in the pebbles is highly significant, suggesting the immediate source of ancient zircons was no longer present at the Earth's surface. This equates with a general lack of ancient crystals noted in rocks that contain Proterozoic zircons from previous studies and implies that such grains diminish in number as earlier sedimentary rocks were successively recycled.

Statistical quality control for volumetric modulated arc therapy (VMAT) delivery by using the machine's log data

NASA Astrophysics Data System (ADS)

Cheong, Kwang-Ho; Lee, Me-Yeon; Kang, Sei-Kwon; Yoon, Jai-Woong; Park, Soah; Hwang, Taejin; Kim, Haeyoung; Kim, Kyoung Ju; Han, Tae Jin; Bae, Hoonsik

2015-07-01

The aim of this study is to set up statistical quality control for monitoring the volumetric modulated arc therapy (VMAT) delivery error by using the machine's log data. Eclipse and a Clinac iX linac with the RapidArc system (Varian Medical Systems, Palo Alto, USA) are used for delivery of the VMAT plan. During the delivery of the RapidArc fields, the machine determines the delivered monitor units (MUs) and the gantry angle's position accuracy and the standard deviations of the MU ( σMU: dosimetric error) and the gantry angle ( σGA: geometric error) are displayed on the console monitor after completion of the RapidArc delivery. In the present study, first, the log data were analyzed to confirm its validity and usability; then, statistical process control (SPC) was applied to monitor the σMU and the σGA in a timely manner for all RapidArc fields: a total of 195 arc fields for 99 patients. The MU and the GA were determined twice for all fields, that is, first during the patient-specific plan QA and then again during the first treatment. The sMU and the σGA time series were quite stable irrespective of the treatment site; however, the sGA strongly depended on the gantry's rotation speed. The σGA of the RapidArc delivery for stereotactic body radiation therapy (SBRT) was smaller than that for the typical VMAT. Therefore, SPC was applied for SBRT cases and general cases respectively. Moreover, the accuracy of the potential meter of the gantry rotation is important because the σGA can change dramatically due to its condition. By applying SPC to the σMU and σGA, we could monitor the delivery error efficiently. However, the upper and the lower limits of SPC need to be determined carefully with full knowledge of the machine and log data.

V/Sc in olivine as a proxy for magma redox conditions

NASA Astrophysics Data System (ADS)

Locmelis, M.; Arevalo, R. D., Jr.; Puchtel, I. S.; Fiorentini, M. L.

2017-12-01

Although olivine is the most abundant mineral in the upper mantle and a major constituent of most mantle-derived rocks, studies on its trace element chemistry are underrepresented. This is especially the case for komatiites, an ultramafic, olivine-dominated rock type that formed via high degrees of partial melting (up to 50%) of the mantle. Komatiites were mostly emplaced in the Archean and therefore provide a unique perspective on the composition and evolution of the early Earth's mantle. Here, we present the V/Sc compositions of olivines from a global set of Paleo- (3.5-3.3 Ga) and Neo-Archean (2.7 Ga) komatiites analyzed via laser ablation ICP-MS. Vanadium and Sc behave similar during partial melting, but V is redox-sensitive (V2+-V5+) and most compatible in olivine as V2+. Scandium is monovalent (Sc3+) and its compatibility in olivine is not affected by the oxygen fugacity (fO2) of the komatiite lava. Therefore, V/Sc ratios in olivines are potentially indicative of the fO2 of the magma they crystallized from. Our data show that V/Sc ratios measured in Neo-Archean olivines (V/Scmean = 1.0 ± 0.1; 2σm) are significantly lower than in their Paleo-Archean counterparts (V/Scmean = 2.1 ± 0.1; 2σm). Geochemical models show that the elevated V/Sc ratios captured by the Paleo-Archean olivines reflect crystallization from magmas that were 1.6 log units (relative to QFM) more reduced than their Neo-Archean counterparts, and thus contained a higher proportion of V2+. Because assimilation of sedimentary bedrocks can alter the composition of komatiites upon emplacement, it may be argued that the redox states recorded by the olivines do not reflect mantle fO2, but the assimilation of crustal material. However, such an effect is not visible in our data as V/Sc ratios in olivines from localities that show evidence of crustal assimilation do not differ from komatiites that did not assimilate significant amounts of crustal rocks. Rather than a crustal signature, the V/Sc ratios suggest a secular increase of fO2 in the Archean mantle of potentially as much as 1.6 log units (relative to QFM) between 3.5-3.3 Ga and 2.7 Ga. These results are intriguing because an increase of only 0.5 log units in mantle fO2 has previously been identified as a sufficient kick-starter for the 2.4 Ga Great Oxidation Event.

Referral patterns of special needs patients at the Royal Dental Hospital of Melbourne, Victoria, Australia.

PubMed

Mohamed Rohani, M; Calache, H; Borromeo, G L

2017-06-01

Special Needs Dentistry (SND) has been recognized as a dental specialty in Australia since 2003 but there have been no studies addressing the profile of patients for specialist care. The purpose of this study is to identify, via referrals received, the profile of patients and quality of referrals at the largest public SND unit in Victoria, Australia. All referrals received over a 6-month period (1 January-30 June 2013) by the integrated SND unit (ISNU) were reviewed prior to allocation to the outpatient clinic (OP), domiciliary (DOM) or general anaesthetic (GA) services. Six-hundred and eighty-eight referrals were received with the majority for the OP clinic (68.3%), followed by DOM (22.4%) and GA services (9.3%) (χ 2  = 360.2, P < 0.001). A referral may have specified more than one special needs condition with the most common category being those who were medically compromised (81.7%). The reasons for referral included lack of compliance (27.2%), further management due to multiple medical conditions or GA services required (9.9%), or for multiple other reasons (62.9%). A diverse pattern of SND patients was referred to the ISNU with a majority of referrals having no specific referral reason cited, suggesting poor quality of referrals. © 2016 Australian Dental Association.