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


1

Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography  

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

Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Print Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Print Humankind has benefitted from a long and productive relationship with yeast. For example, fermentation by yeast is an essential step in the production of bread, beer, wine, and even biofuels. However, not all yeast are beneficial. One strain of yeast, Candida albicans, grows unnoticed on most peoples' skin and in the intestines. In response to certain environmental conditions, C. albicans can switch to a pathogenic phenotype that causes infection. Yeast infections are commonplace, and in otherwise healthy individuals are usually treatable with over-the-counter medications; however, individuals with weakened immune systems can have very serious systemic consequences from a yeast infection. Treating systemic yeast infections is becoming increasingly difficult due to the growing number of yeast strains that have developed resistance to existing antimicrobial drugs. Consequently, there is a pressing need to develop new types of drugs capable of circumventing yeast drug-resistance mechanisms. To this end Stanford, University of California, San Francisco and LBNL researchers have used soft x-ray tomography to image the 3-D structure of both benign and infectious C. albicans yeast. They then imaged this yeast when treated with peptoids, a class of molecules that mimic the peptides our immune system uses as the first line of defense against microbial attack. Unlike conventional antimicrobials, microbes have yet to develop resistance mechanisms against peptides or peptoids, making them appealing candidates for pharmaceutical development.

2

Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography  

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

Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Print Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Print Humankind has benefitted from a long and productive relationship with yeast. For example, fermentation by yeast is an essential step in the production of bread, beer, wine, and even biofuels. However, not all yeast are beneficial. One strain of yeast, Candida albicans, grows unnoticed on most peoples' skin and in the intestines. In response to certain environmental conditions, C. albicans can switch to a pathogenic phenotype that causes infection. Yeast infections are commonplace, and in otherwise healthy individuals are usually treatable with over-the-counter medications; however, individuals with weakened immune systems can have very serious systemic consequences from a yeast infection. Treating systemic yeast infections is becoming increasingly difficult due to the growing number of yeast strains that have developed resistance to existing antimicrobial drugs. Consequently, there is a pressing need to develop new types of drugs capable of circumventing yeast drug-resistance mechanisms. To this end Stanford, University of California, San Francisco and LBNL researchers have used soft x-ray tomography to image the 3-D structure of both benign and infectious C. albicans yeast. They then imaged this yeast when treated with peptoids, a class of molecules that mimic the peptides our immune system uses as the first line of defense against microbial attack. Unlike conventional antimicrobials, microbes have yet to develop resistance mechanisms against peptides or peptoids, making them appealing candidates for pharmaceutical development.

3

Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography  

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

Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Print Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Print Humankind has benefitted from a long and productive relationship with yeast. For example, fermentation by yeast is an essential step in the production of bread, beer, wine, and even biofuels. However, not all yeast are beneficial. One strain of yeast, Candida albicans, grows unnoticed on most peoples' skin and in the intestines. In response to certain environmental conditions, C. albicans can switch to a pathogenic phenotype that causes infection. Yeast infections are commonplace, and in otherwise healthy individuals are usually treatable with over-the-counter medications; however, individuals with weakened immune systems can have very serious systemic consequences from a yeast infection. Treating systemic yeast infections is becoming increasingly difficult due to the growing number of yeast strains that have developed resistance to existing antimicrobial drugs. Consequently, there is a pressing need to develop new types of drugs capable of circumventing yeast drug-resistance mechanisms. To this end Stanford, University of California, San Francisco and LBNL researchers have used soft x-ray tomography to image the 3-D structure of both benign and infectious C. albicans yeast. They then imaged this yeast when treated with peptoids, a class of molecules that mimic the peptides our immune system uses as the first line of defense against microbial attack. Unlike conventional antimicrobials, microbes have yet to develop resistance mechanisms against peptides or peptoids, making them appealing candidates for pharmaceutical development.

4

Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography  

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

Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Print Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Print Humankind has benefitted from a long and productive relationship with yeast. For example, fermentation by yeast is an essential step in the production of bread, beer, wine, and even biofuels. However, not all yeast are beneficial. One strain of yeast, Candida albicans, grows unnoticed on most peoples' skin and in the intestines. In response to certain environmental conditions, C. albicans can switch to a pathogenic phenotype that causes infection. Yeast infections are commonplace, and in otherwise healthy individuals are usually treatable with over-the-counter medications; however, individuals with weakened immune systems can have very serious systemic consequences from a yeast infection. Treating systemic yeast infections is becoming increasingly difficult due to the growing number of yeast strains that have developed resistance to existing antimicrobial drugs. Consequently, there is a pressing need to develop new types of drugs capable of circumventing yeast drug-resistance mechanisms. To this end Stanford, University of California, San Francisco and LBNL researchers have used soft x-ray tomography to image the 3-D structure of both benign and infectious C. albicans yeast. They then imaged this yeast when treated with peptoids, a class of molecules that mimic the peptides our immune system uses as the first line of defense against microbial attack. Unlike conventional antimicrobials, microbes have yet to develop resistance mechanisms against peptides or peptoids, making them appealing candidates for pharmaceutical development.

5

Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography  

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

Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Print Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Print Humankind has benefitted from a long and productive relationship with yeast. For example, fermentation by yeast is an essential step in the production of bread, beer, wine, and even biofuels. However, not all yeast are beneficial. One strain of yeast, Candida albicans, grows unnoticed on most peoples' skin and in the intestines. In response to certain environmental conditions, C. albicans can switch to a pathogenic phenotype that causes infection. Yeast infections are commonplace, and in otherwise healthy individuals are usually treatable with over-the-counter medications; however, individuals with weakened immune systems can have very serious systemic consequences from a yeast infection. Treating systemic yeast infections is becoming increasingly difficult due to the growing number of yeast strains that have developed resistance to existing antimicrobial drugs. Consequently, there is a pressing need to develop new types of drugs capable of circumventing yeast drug-resistance mechanisms. To this end Stanford, University of California, San Francisco and LBNL researchers have used soft x-ray tomography to image the 3-D structure of both benign and infectious C. albicans yeast. They then imaged this yeast when treated with peptoids, a class of molecules that mimic the peptides our immune system uses as the first line of defense against microbial attack. Unlike conventional antimicrobials, microbes have yet to develop resistance mechanisms against peptides or peptoids, making them appealing candidates for pharmaceutical development.

6

Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography  

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

Imaging Antifungal Drug Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Imaging Antifungal Drug Molecules in Action using Soft X-Ray Tomography Print Wednesday, 24 February 2010 00:00 Humankind has benefitted from a long and productive relationship with yeast. For example, fermentation by yeast is an essential step in the production of bread, beer, wine, and even biofuels. However, not all yeast are beneficial. One strain of yeast, Candida albicans, grows unnoticed on most peoples' skin and in the intestines. In response to certain environmental conditions, C. albicans can switch to a pathogenic phenotype that causes infection. Yeast infections are commonplace, and in otherwise healthy individuals are usually treatable with over-the-counter medications; however, individuals with weakened immune systems can have very serious systemic consequences from a yeast infection. Treating systemic yeast infections is becoming increasingly difficult due to the growing number of yeast strains that have developed resistance to existing antimicrobial drugs. Consequently, there is a pressing need to develop new types of drugs capable of circumventing yeast drug-resistance mechanisms. To this end Stanford, University of California, San Francisco and LBNL researchers have used soft x-ray tomography to image the 3-D structure of both benign and infectious C. albicans yeast. They then imaged this yeast when treated with peptoids, a class of molecules that mimic the peptides our immune system uses as the first line of defense against microbial attack. Unlike conventional antimicrobials, microbes have yet to develop resistance mechanisms against peptides or peptoids, making them appealing candidates for pharmaceutical development.

7

Offset Printing, Production Services  

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

Printing Printing Our full service print shop provides prepress services, single and multicolor offset printing, and complete bindery. We print Reports Forms Brochures, leaflets and flyers Name tags and meal tickets Newsletters, etc Prepress Electronic files and paper copy prepared for printing. Complete Bindery Apply address labels or tabs to printed material. Machine fold documents and insert into envelopes for mailing. Laminate printed items up to 35" wide. Numbering and perforating. Trimming, drilling, padding and stitching. Special Printing Special reports, full color printing, continuous and carbon forms printed through the U.S. Government Printing Office. Additional Information Printing can be reached on X2953 The supervisor is Rick Backofen who can be reached on X6183

8

Printing | Department of Energy  

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

Employee Services » Printing Employee Services » Printing Printing The Printing Team is the liaison between the U.S. Government Printing Office and the Department of Energy. It consists of an expert group of printing specialists who offer a full range of services from assistance in developing your printing requirements to the final printing, distribution and mailing of products. The printed products range from black and white to full color items. These Services are available through the Working Capital Fund. The Printing Office produces a complete range of high-quality printed products comparable to those available from a full-service commercial enterprise. These include: Reports Books Pamphlets and Brochures Public Information Materials Presentation and Promotional Posters Forms and Letterhead

9

Second Printing November 1990  

E-Print Network (OSTI)

Electronic VersionAbout WMRC's Electronic Publications: This document was originally published in a traditional format. It has been transferred to an electronic format to allow faster and broader access to important information and data. While the Center makes every effort to maintain a level of quality during the transfer from print to digital format, it is possible that minor formatting and typographical inconsistencies will still exist in this document. Additionally, due to the constraints of the electronic format chosen, page numbering will vary slightly from the original document. The original, printed version of this document may still be available. Please contact WMRC for more information: WMRC

David Thomas; Lon Carlson; Walt Mikucki; Rachel Baker; John Warren; Doug Maxelner; Eliliott Zimmermann; Claudia Washburn; David Thomas; Lon Carlson; Walt Mikucki; Rachel Baker; John Warren; Doug Maxeiner; Elliott Zimmermann; Claudia Washburn; James R. Thompson

1990-01-01T23:59:59.000Z

10

Silver Ink for Conductor Printing  

Many applications require the ability to print conductors on devices that cannot tolerate high temperatures. Current methods for making printable ...

11

Organic vapor jet printing system  

DOE Patents (OSTI)

An organic vapor jet printing system includes a pump for increasing the pressure of an organic flux.

Forrest, Stephen R

2012-10-23T23:59:59.000Z

12

Roll Printed Electronics: Development and Scaling of Gravure Printing Techniques  

E-Print Network (OSTI)

gravure printing of indium tin oxide nanoparticle patternsfor the deposition of indium tin oxide nanoparticles forwith and without Indium Zinc Oxide (IZO) conductive layers

de la Fuente Vornbrock, Alejandro

2009-01-01T23:59:59.000Z

13

Nano-contact printing of DNA monolayers  

E-Print Network (OSTI)

Technology today is directed towards building smaller devices. To accommodate this development, printing methods are needed. Some printing methods that are used include lithography, micro-contact printing, and inkjet ...

Tong, Angela, 1983-

2005-01-01T23:59:59.000Z

14

Public Law 102-392 for Printing | Department of Energy  

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

2-392 for Printing Public Law 102-392 for Printing Public Law 102-392 for Printing Public Law 102-392 for Printing More Documents & Publications Minutes from the Print and Mail...

15

Add your e-prints to the E-print Network -- Energy, science,...  

Office of Scientific and Technical Information (OSTI)

Add E-prints We invite you to submit your e-prints to the network. Having your e-prints in the network increases awareness of them and promotes the dissemination of your...

16

Print the Fuel Economy Guide  

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

Print the Fuel Economy Guide Print the Fuel Economy Guide 2014 Fuel Economy Guide 2014 Fuel Economy Guide Adobe Acrobat Icon MPG data updated December 19, 2013 The annual fuel cost estimates in the 2008-2014 electronic fuel economy guides are updated weekly to match EIA's current national average prices for gasoline and diesel fuel. Order a printed copy: Order Note that the published guides may not be as up-to-date at the downloadable version. View vehicles from 1984 to the present: Go to Find-a-Car Unlike the annual guides which cover only one model year, Find-a-Car provides the most up-to-date fuel economy information for vehicles from model year 1984 to the present, along with environmental and safety data. Find a Car Developer Tools 2013 Fuel Economy Guide 2013 Fuel Economy Guide Adobe Acrobat Icon

17

TE Connectivity Finds Answers in Tomography  

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

TE Connectivity Finds Answers in TE Connectivity Finds Answers in Tomography TE Connectivity Finds Answers in Tomography Print Thursday, 22 August 2013 10:50 TE Connectivity is a world leader in connectivity-the $13 billion global company designs and manufactures more than 500,000 different electronic connectivity products for the automotive, energy, industrial, broadband communications, consumer device, healthcare, aerospace, and defense industries. TE Connectivity has a long-standing commitment to innovation and engineering excellence. Their products help address challenges arising from companies' need for energy efficiency, always-on communications, and ever-increasing productivity. Recently, a team led by TE's senior manager of materials development, Dr. Jerzy Gazda (at left), has been investigating how ALS tomography capabilities can help the company develop more efficient connectors.

18

Printed optics: 3D printing of embedded optical elements for interactive devices  

Science Conference Proceedings (OSTI)

We present an approach to 3D printing custom optical elements for interactive devices labelled Printed Optics. Printed Optics enable sensing, display, and illumination elements to be directly embedded in the casing or mechanical structure ... Keywords: 3d printing, additive manufacturing, display, light, optics, projection, rapid prototyping, sensing

Karl Willis; Eric Brockmeyer; Scott Hudson; Ivan Poupyrev

2012-10-01T23:59:59.000Z

19

E-Print Network 3.0 - User Login  

Office of Scientific and Technical Information (OSTI)

Home About Advanced Search Browse by Discipline Scientific Societies E-print Alerts Add E-prints E-print Network E-print Network Skip to main content FAQ * HELP * SITE MAP *...

20

Print  

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

GFDL GCM Model Output with ARM CMBE Dataset: A First Look GFDL GCM Model Output with ARM CMBE Dataset: A First Look Jean-Christophe Golaz, UCAR VSP, GFDL Leo J. Donner and V. Ramaswamy, Geophysical Fluid Dynamics Laboratory, Princeton, NJ U . S . D E P A R T M E NT O F C O M M E R C E N A TION A L O C E A N I C A N D A T MO S P H E R I C A D M I N I S T R ATIO N What is CMBE? - CMBE (Climate Modeling Best Estimate) is a new ARM dataset specifically designed to evaluate climate models against ARM observations. - CMBE contains best estimates of selected ARM measurements: cloud fraction, surface radiation fluxes, total cloud cover, liquid water path, precipitable water vapor. - For more information on CMBE: http://science.arm.gov/wg/cpm/scm/best_estimate.html GFDL GCM models used in this comparison - AM2.1: current version of the atmospheric model (GFDL Global Atmosphere

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


21

Print  

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

Fungi play key roles in DOE- Fungi play key roles in DOE- relevant missions of bioenergy production, bioremediation and carbon cycling. In bioenergy proj- ects alone, for example, fungal genome data have been used not only to ensure the health of crops that serve as biomass feedstocks but also provide enzymes that can break down the biomass as well as help convert it to transportation fuel. The DOE JGI has developed a Fungal Genomics Program headed by Igor Grigoriev. The program's first project, launched October 1, is the Genome Encyclopedia of Fungi (GEF). The program aims to explore fungi's ecological diversity and breadth across the Tree of Life for DOE-relevant science and applications. DOE JGI pioneered sequenc- ing and analysis of several fungi important for lignocellu- lose degradation, enzyme pro-

22

Print  

FLC Far West is one of six regions covering the United States and is comprised of 8 western states, Alaska, Arizona, California, Hawaii, Idaho, Nevada, ...

23

Print  

Science Conference Proceedings (OSTI)

Basics of Combustion and Environmental Considerations * Typical Burners Used in Aluminum Cast Houses * Blowers/Exhausters * Dioxin and Furan Issues

24

Print  

Science Conference Proceedings (OSTI)

This presentation will cover the basics of fan design. It will give you the understanding of how to read a fan curve and where they come from. It will also cover the...

25

Print  

Science Conference Proceedings (OSTI)

He has lectured at universities and numerous 'schools' regarding neutron and synchrotron radiation. Liss supervises students, gives user support, acts on...

26

Print  

Science Conference Proceedings (OSTI)

Mining and processing are energy intensive and the usage of energy in the industry will ... He chaired the Green Processing 2002 and 2004 conferences of the...

27

Print  

Science Conference Proceedings (OSTI)

OVERVIEW. Pot emissions; Environmental regulations and permits; History of GTCs. FLUORIDE EMISSIONS. The Gaseous and Particulate Forms of Fluorides ...

28

Print  

Science Conference Proceedings (OSTI)

For example, uranium dioxide (UO2) is the primary nuclear fuel in light-water reactors. ... He graduated from Ohio Wesleyan University in 1978 (BA in Physics ...

29

Print  

Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988 Operated by Lawrence Livermore National Security, LLC ...

30

Print  

Nondisclosure Agreement (NDA) A Nondisclosure Agreement (NDA), or confidentiality agreement, governs disclosure of non-public business information that the parties to ...

31

Print  

Science Conference Proceedings (OSTI)

... and application of LCA in mining, mineral processing, and metal production. ... of environmental impacts and external costs of production and consumption.

32

Print  

One of my most interesting projects is reviewing the office actions for ... management consulting in ... market and the economic and environmental ...

33

Print  

An LLNL developed laser has been adapted into a process called laser peening for use by industry to provide critical metal components with economical protection ...

34

Print  

About IPO. The LLNL Industrial Partnerships Office (IPO), with its staff of scientists, engineers, attorneys, and entrepreneurs, is the conduit through which the ...

35

Print  

Students. IPO has successfully collaborated with business schools and entrepreneurial centers in ongoing business plan competitions by offering LLNL technologies that ...

36

Print  

Lawrence Livermore National Laboratory (LLNL) is a national resource, with outstanding scientific and technical capabilities. LLNL has for many years been a leader ...

37

Print  

Science Conference Proceedings (OSTI)

His academic career has been in close collaboration with the aluminium industry, including Alcan Int. Banbury and LSM Rotherham United Kingdom, and led to...

38

Print  

Science Conference Proceedings (OSTI)

His engineering work in industry, government and academia has led to breakthroughs from mathematical modeling of phase transformations with fluid- structure...

39

Print  

Science Conference Proceedings (OSTI)

... will teach how open top ring furnace(s) should be operated to bake anodes properly and avoid these potential issues while minimizing fuel consumption.

40

Print  

Science Conference Proceedings (OSTI)

Secondly, TOC provides very clear focus for prioritizing variation reduction and the strategic use of inventory and protective capacity to manage and improve...

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


41

Print  

Science Conference Proceedings (OSTI)

Mark has more than 20 years in the metallurgical industry (nickel, ferro-nickel, zinc, copper, magnesium, aluminium and materials) in plant operations, project...

42

Print  

Science Conference Proceedings (OSTI)

In addition to his academic research, Reynolds has also served as a consultant to SKB (The Swedish Nuclear Fuel and Waste Management Company) for their...

43

Print  

Virtual reality display techniques developed for glasses free stereoscopic visualization can be connected to remote twin video inputs.

44

Print  

Science Conference Proceedings (OSTI)

She held a joint postdoctoral appointment in Materials Science at Queen Mary, University of London and Anatomy and Developmental Biology at University...

45

Print  

Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988 Operated by Lawrence Livermore ...

46

Print  

Hydrogen peroxide based explosive systems have become a concern for transportation safety and security, especially because of events such as the 2005 ...

47

Print  

Operated by Lawrence Livermore National Security, LLC, for the Department of Energy's National Nuclear Security Administration

48

Print  

This will assist emergency responders and aid in protecting public health. This copolymer and solvent solution is used to bind with airborne hazardous ...

49

Printed circuit dispersive transmission line  

DOE Patents (OSTI)

A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission line between two adjacent periodic intersections to be longer than the other. 5 figures.

Ikezi, H.; Lin-Liu, Y.R.; DeGrassie, J.S.

1991-08-27T23:59:59.000Z

50

Printed circuit dispersive transmission line  

DOE Patents (OSTI)

A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission line between two adjacent periodic intersections to be longer than the other.

Ikezi, Hiroyuki (Rancho Santa Fe, CA); Lin-Liu, Yuh-Ren (San Diego, CA); DeGrassie, John S. (Encinitas, CA)

1991-01-01T23:59:59.000Z

51

Printed circuit dispersive transmission line  

DOE Patents (OSTI)

A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission lines between two adjacent periodic intersections to be longer than the other. 5 figs.

Ikezi, Hiroyuki; Lin-Liu, Yuh-Ren; deGrassie, J.S.

1990-03-02T23:59:59.000Z

52

Printed optics: 3d printing of embedded optical elements for interactive devices  

E-Print Network (OSTI)

a b c d Figure 1: Custom optical elements are fabricated with 3D printing and embedded in interactive devices, opening up new possibilities for interaction including: unique display surfaces made from 3D printed light pipes (a), novel internal illumination techniques (b), custom optical sensors (c), and embedded optoelectronics (d). We present an approach to 3D printing custom optical elements for interactive devices labelled Printed Optics. Printed Optics enable sensing, display, and illumination elements to be directly embedded in the casing or mechanical structure of an interactive device. Using these elements, unique display surfaces, novel illumination techniques, custom optical sensors, and embedded optoelectronic components can be digitally fabricated for rapid, high fidelity, highly customized interactive devices. Printed Optics is part of our long term vision for interactive devices that are 3D printed in their entirety. In this paper we explore the possibilities for this vision afforded by fabrication of custom optical elements using todays 3D printing technology.

Karl D. D. Willis; Eric Brockmeyer; Scott E. Hudson; Ivan Poupyrev

2012-01-01T23:59:59.000Z

53

Powerful tools at E-print Network  

Office of Scientific and Technical Information (OSTI)

Energy. These subject-based e-prints reside at institutional repositories, websites and data bases, remote locations worldwide. About two million of these research documents are...

54

All the items fit to print  

Science Conference Proceedings (OSTI)

3D printing has come of age. It promises to revolutionize a wide range of industries and profoundly change the way people buy and consume.

Samuel Greengard

2013-07-01T23:59:59.000Z

55

High quality offset printing: an evolutionary approach  

Science Conference Proceedings (OSTI)

Print media are still very important for everyone's daily life. Current efforts are concerned with the application of the well-established offset-printing technology to other media, particularly cardboards, which require some substantial adaptations. ... Keywords: evolutionary algorithms, image processing, industrial application

Ralf Joost; Ralf Salomon

2007-07-01T23:59:59.000Z

56

2012, 2012, VII, 127 p. Printed book  

E-Print Network (OSTI)

2012, 2012, VII, 127 p. Printed book Hardcover 99,95 | £90.00 | $129.00 *106,95 (D) | 109,95 (A) | CHF 133.50 eBook Available from libraries offering Springer's eBook Collection.com/ebooks MyCopy Printed eBook exclusively available to patrons whose library offers Springer's eBook

Geest, Harm G. van der

57

Silver lines electrode patterned by transfer printing  

Science Conference Proceedings (OSTI)

This paper reports a novel method for the fabrication of silver electrode with high resolution using transfer printing method. The resolution can reach to 30@mm with high electrical conductivity as we keep a large depth and micro-size particles of the ... Keywords: Transferring printing

Liangjin Ge; L. Jay Guo; Xudi Wang; Shaojun Fu

2012-09-01T23:59:59.000Z

58

E-print Network Alert Service  

Office of Scientific and Technical Information (OSTI)

E-print Web Log E-print Web Log alert image About Search Browse by Discipline Find Scientific Societies Receive E-print Alerts Contact Us Help Home Site Map OSTI DOE Welcome to E-print Alerts! This feature can be used to automatically keep abreast of the latest e-prints posted on ArXiv databases as well as a number of other science and engineering databases and Web sites, based on a search profile you submit to us. You can even receive new postings from a number of sites by submitting a single profile based on your specific area of interest. The Service is free, and you can create as many profiles as you wish. Simply register for the Service and create your search strategies for your profiles. This will be run against all selected databases and Web sites, and you will receive a weekly Alert via e-mail with the results of your automatic profile search.

59

Berkeley Lab UNIX-based Distributed Printing (DP)  

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

Berkeley Lab UNIX-based Distributed Printing (DP) Berkeley Lab UNIX-based Distributed Printing (DP) LBNL Computing Services supports a variety of printers located throughout the Laboratory through its UNIX-based Distributed Printing System. Make sure to read the UNIX distributed printing overview. See Novell printing for information on Novell-based printing here. Berkeley Lab UNIX-based Distributed Printing (DP) Information Overview Print commands Print charges Printer lists (by division, etc.) Add a new DP printer name paper sizes (a4, etc.) Fixes for common problems Deleting print jobs on Solaris Printer-specific information Groff (GNU ditroff) on Sun & SGI System Admin Information CUPS printing information CUPS FAQ LINUX test suite of files; etc. Setting default printer using lpoptions Test suite of print files

60

Minutes from the May 26, 2010 Printing and Mail Teleconference  

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

26, 2010 26, 2010 Printing and Mail Managers Exchange Forum Teleconference Seventeen individuals participated in the Printing and Mail Managers Exchange Forum, which included Printing and Mail Managers and Contractors. Comments/Additions to last Months Minutes Dallas Woodruff, Headquarters opened the meeting by thanking everyone for participating in the today's teleconference. Printing Agenda Items... Update on the FY 2010, Congressional Joint Committee on Printing Commercial Printing Report "JCP Form No. 2" Dallas Woodruff, Headquarters informed the group that Headquarters received responses from all DOE printing and duplicating facilities. The report is due to the Congressional Joint Committee on Printing no later than May 31, 2010.

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


61

Dispenser Printed Zinc Microbattery with an Ionic Liquid Gel Electrolyte  

E-Print Network (OSTI)

Ink-jet printed carbon supercapacitor electrodes on gold,Ink-jet printed carbon supercapacitor electrodes on gold,Microcapacitors Thin film supercapacitor (TFSC) research has

Ho, Christine Chihfan

2010-01-01T23:59:59.000Z

62

Industrial Uses of Vegetable OilsChapter 9 Printing Inks  

Science Conference Proceedings (OSTI)

Industrial Uses of Vegetable Oils Chapter 9 Printing Inks Processing eChapters Processing Press Downloadable pdf of Chapter 9 Printing Inks from the book ...

63

E-print Network : Main View : Deep Federated Search  

Office of Scientific and Technical Information (OSTI)

E-print Network E-print Network Search Powered By Deep Web Technologies New Search Preferences E-print Network E-print Network Skip to main content FAQ * HELP * SITE MAP * CONTACT US Home * About * Advanced Search * Browse by Discipline * Scientific Societies * E-print Alerts * Add E-prints Powered by Deep Web Technologies E-print Network E-print Network Skip to main content FAQ * HELP * SITE MAP * CONTACT US Home * About * Advanced Search * Browse by Discipline * Scientific Societies * E-print Alerts * Add E-prints Main View This view is used for searching all possible sources. Due to the varied configuration and diversity of web pages and databases searched by E-prints, Full Record will search whatever data is searchable at each site. Multiple arXiv sites under one general heading are combined

64

Minutes from the Print and Mail Managers Exchange Forum Teleconferences |  

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

Minutes from the Print and Mail Managers Exchange Forum Minutes from the Print and Mail Managers Exchange Forum Teleconferences Minutes from the Print and Mail Managers Exchange Forum Teleconferences Minutes from the Print and Mail Managers Exchange Forum Teleconferences. Contact the Office of Administrative Management and Support at (202) 586-4318 with any questions. Last updated 04/01/13 Minutes from the March 14, 2013 Printing and Mail Teleconference Minutes from the January 10, 2013 Printing and Mail Teleconference Minutes from the November 01, 2012 Printing and Mail Teleconference Minutes from the June 28, 2012 Printing and Mail Teleconference Minutes from the May 03, 2012 Printing and Mail Teleconference Minutes from the February 23, 2012 Printing and Mail Teleconference Minutes from the October 26, 2011 Printing and Mail Teleconference

65

Widget:PrintFullVersionButton | Open Energy Information  

Open Energy Info (EERE)

PrintFullVersionButton PrintFullVersionButton Jump to: navigation, search This widget creates a button, which create a button matching the PrintPDF button style, which will direct the user to the assembled page. This template assumes the existence of the PrintPDFButton widget and template. Parameters page - The wiki address of the assembled page, or full version to be printed. cover - The name of a wiki page to use as a cover page (optional) Dependencies Template:PrintFullVersionButton Template:PrintPDFButton Widget:PrintPDFButton Usage This Widget assumes the existence of HTML elements created by the PrintFullVersionButton template, and is called via that template. {{PrintFullVersionButton}} Example {{PrintFullVersionButton}} (displays in the upper right corner of the page) Retrieved from

66

Clean Cities: Clean Cities Print Products and Templates  

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

Print Products and Print Products and Templates to someone by E-mail Share Clean Cities: Clean Cities Print Products and Templates on Facebook Tweet about Clean Cities: Clean Cities Print Products and Templates on Twitter Bookmark Clean Cities: Clean Cities Print Products and Templates on Google Bookmark Clean Cities: Clean Cities Print Products and Templates on Delicious Rank Clean Cities: Clean Cities Print Products and Templates on Digg Find More places to share Clean Cities: Clean Cities Print Products and Templates on AddThis.com... Coordinator Basics Outreach Logos, Graphics, & Photographs Print Products & Templates Exhibit Booths Presentations Videos QR Codes Tips Education & Webinars Meetings Reporting Contacts Clean Cities Print Products and Templates Clean Cities has a wide variety of print products, marketing materials, and

67

Add your e-prints to the E-print Network -- Energy, science, and technology  

Office of Scientific and Technical Information (OSTI)

Add E-prints Add E-prints We invite you to submit your e-prints to the network. Having your e-prints in the network increases awareness of them and promotes the dissemination of your information to a broader audience. We do not add all submitted e-prints to our collection, and we cannot make any predictions or guarantees about when or if they will appear. See "What are the criteria for inclusion in the E-print Network?" Please enter your full URL, including the http:// prefix. For example: http://www.osti.gov/eprints/. You may also add comments or keywords that describe the content of your page. These are used only for our information and do not affect how your page is indexed or used. Label ID URL (required): Title (required): E-mail address (required): Your Name:

68

Field Facilities Contacts for Printing and Mail  

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

Facilities Contacts for Printing and Mail Facilities Contacts for Printing and Mail Print and Mail Contacts Site Printing Contact Mail Contact NNSA, Albuquerque Deborah Miller (505) 845-6049 Thomas H. Clinkenbeard NNSA Service Center PO Box 5400 Albuquerque, NM 87185-5400 (505) 845-4602 tclinkenbeard@doeal.gov (mailto:tclinkenbeard@doeal.gov) Argonne National Laboratory Doreen Schoening Argonne National Laboratory U.S. Department of Energy 9700 South Cass Avenue Blvd 340 Lemonmt, IL 60439 (630) 840-6399 dschoening@anl.gov (mailto:dschoening@anl.gov) Bechtel Jacobs James Hughes Bechtel Jacobs - Mail Stop 7294 U.S. Department of Energy PO Box 4699 Oak Ridge, TN 37831 (865) 576-8423 Berkeley Site Office Mercedes Downing Berkeley Site Office U.S. Department of Energy 1 Cyclotron Road Bldg 90

69

E-print Network : User Account  

Office of Scientific and Technical Information (OSTI)

E-print Network Reset your password Enter either your User Name or Email Address to reset your password. User Name: Email Address: Go Some links on this page may take you to...

70

E-print Network : User Account  

Office of Scientific and Technical Information (OSTI)

New Search | My Selections (0) | | | | Alerts | E-print Network Create User Account User Name: Email Address: I want to: Always receive emails Receive emails if there are new...

71

Inkjet printed electronics using copper nanoparticle ink  

E-Print Network (OSTI)

but it had high electrical resistivity of 140 nX m, which isInstruments, USA). An electrical resistivity was calculatedlength, and q is the electrical resistivity of an printed

Kang, Jin Sung; Kim, Hak Sung; Ryu, Jongeun; Thomas Hahn, H.; Jang, Seonhee; Joung, Jae Woo

2010-01-01T23:59:59.000Z

72

Modeling and optimization of stencil printing operations: A comparison study  

Science Conference Proceedings (OSTI)

This paper presents a comparison study for the optimization of stencil printing operations using hybrid intelligence technique and response surface methodology (RSM). An average 60% of soldering defects are attributed to solder paste stencil printing ... Keywords: DPMO, Fuzzy quality loss function, Genetic algorithms, Neural network, Printed circuit board, Stencil printing, Surface mount technology

Tsung-Nan Tsai

2008-04-01T23:59:59.000Z

73

Conductive inkjet printed DIY music control surface  

Science Conference Proceedings (OSTI)

We developed a novel music control sensate surface, which enables retrofit integration between any musical instruments with a versatile, customizable, and essentially cost-effective user interface. Our project presents new opportunities in customizable, ... Keywords: conductive inkjet printing, music interfaces, rapid ui prototyping

Nan-Wei Gong; Nan Zhao; Joseph A. Paradiso

2013-04-01T23:59:59.000Z

74

Federal Recycling Program Printed on recycled paper.  

E-Print Network (OSTI)

#12;Federal Recycling Program Printed on recycled paper. The Forest Health Technology Enterprise. This book was pub- lished by FHTET as part of the technology transfer series. http.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis

Hoddle, Mark S.

75

Print this Page Close The nuclear deal  

E-Print Network (OSTI)

that the US will adopt to the demands of Pakistan and Israel, which will also claim to be responsible nuclearPrint this Page Close The nuclear deal July 20, 2005 | 19:05 ISTT P Sreenivasan | y assuming the same responsibilities and practices as leading countries with nuclear technologies 'such as the United

76

E-print Network: Research Communications for Scientists and Engineers  

Office of Scientific and Technical Information (OSTI)

E-print Web Log E-print Web Log E-print Network E-print Network About Search Browse by Discipline Find Scientific Societies Receive E-print Alerts Contact Us Help Home Site Map OSTI DOE For Immediate Release January 10, 2005 For more information, contact: Alison Buckholtz, SPARC, alison@arl.org Susan Tackett, OSTI, tacketts@osti.gov DOE/OSTI's E-PRINT NETWORK SELECTED AS SPARC PARTNER Provides Research Communications and Full-Text Searching of Science Websites and Databases Washington, DC -SPARC (the Scholarly Publishing and Academic Resources Coalition) today announced that the E-print Network, a free service of the U.S. Department of Energy (DOE) Office of Scientific and Technical Information (OSTI), has been chosen as a SPARC Scientific Communities partner. The selection recognizes the contribution of the E-print Network to expanded availability and use of open-access scientific and technical research on the Internet.

77

Profile Optimization for Wet-Printed Polymer Films  

E-Print Network (OSTI)

of a spin-coated film. In the next chapter, a dry printing method will be introduced, which has superior

78

Piezoelectric Drop-on-Demand Inkjet Printing of Rat Fibroblast Cells: Survivability Study and Pattern Printing  

E-Print Network (OSTI)

A novel piezoelectric, drop-on-demand (DOD) inkjet system has been developed and used to print L929 rat fibroblast cells. We investigate the survivability of the cells subjected to the large stresses during the printing process. These stresses are varied by changing the diameter of the orifice (36 to 119 microns) through which the cells are dispensed, as well as changing the electrical pulse used to drive the piezoelectric element. It is shown that for the smallest 36 microns diameter orifice, cell survival rates fall from 95% to approximately 76% when the ejection velocity is increased from 2 to 16 m/s. This decrease in survival rates is less significant when the larger orifice diameters of 81 microns and 119 microns are used. Analysis shows that there is a clear inverse relationship between cell survival rates and the mean shear rates during drop formation. By using the same printing set-up, fibroblast cells are printed onto alginate and collagen into patterns. Printed cells are cultured over a period of days to verify their long-term viability. Fibroblasts printed onto the collagen are found to successfully adhere, spread and proliferate, subsequently forming a denser patterns after 5 days in culture. Cell agglomeration is found to affect the printing performance, especially for the printhead with the smallest orifice, leading to frequent clogging of the nozzle. We also study the number of cells in each droplet, when printed under optimal conditions. The probability density of this number follows a binomial distribution, which consistent with a uniform distribution of cells in the medium and within the printhead.

Er Qiang Li; Eng Khoon Tan; Sigurdur Tryggvi Thoroddsen

2013-10-02T23:59:59.000Z

79

E-print Network : User Login  

Office of Scientific and Technical Information (OSTI)

New Search | New Search | My Selections (0) | | | | Alerts | E-print Network Login The E-print Network ALERTS feature will automatically update you regarding newly available information in your specific area(s) of interest. Simply register for the service, then create a search strategy which will be run against information added to . Select a schedule (weekly, monthly, etc.) for receiving the email Alerts. If you are a new patron, Register to learn how to set up Alerts to meet your needs. If you are an existing patron, enter your user name and password in the boxes to login. Once logged in, you may review or modify your search, add a new search and see recent Alerts results. User Name: Password: Remember Me Remember me on this computer. Login Don't have a user name? Register!

80

Department of Energy Strategic Plan, May 2011, Print Quality | Department  

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

Department of Energy Strategic Plan, May 2011, Print Quality Department of Energy Strategic Plan, May 2011, Print Quality Department of Energy Strategic Plan, May 2011, Print Quality Posted here are publication materials related to the Department of Energy's Strategic Plan of 2011. DOE_2011-Strategic-Plan_High-Resolution_Print-Quality is a full-data, high-resolution version of the document. This will print/reproduce with the maximum resolution available from your output device (printer). This is a 15.7 Mb file. DOE_2011-Strategic-Plan_Medium-Resolution_Print-Quality is a medium-resolution version of the document. The images have been slightly downsampled and compressed so the file can be easier transmitted. This will print/reproduce at medium resolution on your output device (printer). This is a 3.6 Mb file.

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


81

Piezoelectric Drop-on-Demand Inkjet Printing of Rat Fibroblast Cells: Survivability Study and Pattern Printing  

E-Print Network (OSTI)

A novel piezoelectric, drop-on-demand (DOD) inkjet system has been developed and used to print L929 rat fibroblast cells. We investigate the survivability of the cells subjected to the large stresses during the printing process. These stresses are varied by changing the diameter of the orifice (36 to 119 microns) through which the cells are dispensed, as well as changing the electrical pulse used to drive the piezoelectric element. It is shown that for the smallest 36 microns diameter orifice, cell survival rates fall from 95% to approximately 76% when the ejection velocity is increased from 2 to 16 m/s. This decrease in survival rates is less significant when the larger orifice diameters of 81 microns and 119 microns are used. Analysis shows that there is a clear inverse relationship between cell survival rates and the mean shear rates during drop formation. By using the same printing set-up, fibroblast cells are printed onto alginate and collagen into patterns. Printed cells are cultured over a period of da...

Li, Er Qiang; Thoroddsen, Sigurdur Tryggvi

2013-01-01T23:59:59.000Z

82

Minutes from the November 17, 2010 Printing and Mail Teleconference  

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

November 17, 2010 November 17, 2010 Printing and Mail Managers Exchange Forum Teleconference Twenty seven individuals participated in the Printing and Mail Managers Exchange Forum, which included Printing and Mail Managers and Contractors Comments/Additions to last Months Minutes No comments. Printing Agenda Items......... Update on the Department-wide "Three-Year Plan" Dallas Woodruff, Headquarters opened the meeting by thanking everyone for providing their sites Three-Year Plan data to Headquarters in timely manner. Mr. Woodruff went on to say a number of individuals indentified a problem with the narrative section of the PPAFI Spreadsheets (unable to print the narratives). Mr. Woodruff notified the programmer of the narrative section printing glitch.

83

Minutes from the March 17, 2010 Printing and Mail Teleconference  

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

March 17, 2010 March 17, 2010 Printing and Mail Managers Exchange Forum Teleconference Twenty-eight individuals participated in the Printing and Mail Managers Exchange Forum, which included Printing and Mail Managers and Contractors. Comments/Additions to last Months Minutes Dallas Woodruff, Headquarters opened the meeting by thanking everyone for participating in the today's teleconference. Printing Agenda Items... Upcoming Congressional Joint Committee on Printing Commercial Printing Report "JCP Form No. 2" Dallas Woodruff, Headquarters informed the group that sites should receive the call letter for the report on or around March 30, 2010. The report is due back to Headquarters by May 3, 2009. Mr. Woodruff reminded the group that they must report negative responses as well.

84

Minutes from the January 20, 2010 Printing and Mail Teleconference  

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

, 2010 , 2010 Printing and Mail Managers Exchange Forum Teleconference Twenty-one individuals participated in the Printing and Mail Managers Exchange Forum, which included Printing and Mail Managers and Contractors. Comments/Additions to last Months Minutes Dallas Woodruff, Headquarters opened the meeting by thanking everyone for participating in the today's teleconference. Printing Agenda Items... Update on the Department-wide Printing and Publishing Activities Report Three-Year Plan. Dallas Woodruff, Headquarters thanked the group for their contributions made to the Department-wide printing program during FY 2009. Mr Woodruff also thanked the group for providing data for the FY 2009 Three-Year Plan in a timely manner. The Three-Year Plan is in track for completion before the February

85

Power Electronics in the Printing and Publishing Industry  

Science Conference Proceedings (OSTI)

This report provides utility marketing and account executives and engineering staff with basic information about the use of power electronics systems and technologies in the printing and publishing industry. The report first describes the printing and publication industry. Then it outlines how power electronics may provide equipment designers with the power electronics topologies required to design and manufacturer future equipment used in the printing and publishing industry.

1999-12-16T23:59:59.000Z

86

Optical systems fabricated by printing-based assembly - Energy ...  

Provided are optical devices and systems fabricated, at least in part, via printing-based assembly and integration of device components. In specific embodiments the ...

87

DOE fundamentals handbook: Engineering symbology, prints, and drawings  

Science Conference Proceedings (OSTI)

The Engineering Symbology, Prints, and Drawings Handbook was developed to assist nuclear facility operating contractors in providing operators, maintenance personnel, and technical staff with the necessary fundamentals training to ensure a basic understanding of engineering prints, their use, and their function. The handbook includes information on engineering fluid drawings and prints; piping and instrument drawings; major symbols and conventions; electronic diagrams and schematics; logic circuits and diagrams; and fabrication, construction, and architectural drawings. This information will provide personnel with a foundation for reading, interpreting, and using the engineering prints and drawings that are associated with various DOE nuclear facility operations and maintenance.

Not Available

1993-01-01T23:59:59.000Z

88

DOE fundamentals handbook: Engineering symbology, prints, and drawings. Volume 1  

Science Conference Proceedings (OSTI)

The Engineering Symbology, Prints, and Drawings Handbook was developed to assist nuclear facility operating contractors in providing operators, maintenance personnel, and technical staff with the necessary fundamentals training to ensure a basic understanding of engineering prints, their use, and their function. The handbook includes information on engineering fluid drawings and prints; piping and instrument drawings; major symbols and conventions; electronic diagrams and schematics; logic circuits and diagrams; and fabrication, construction, and architectural drawings. This information will provide personnel with a foundation for reading, interpreting, and using the engineering prints and drawings that are associated with various DOE nuclear facility operations and maintenance.

Not Available

1993-01-01T23:59:59.000Z

89

DOE fundamentals handbook: Engineering symbology, prints, and drawings. Volume 2  

SciTech Connect

The Engineering Symbology, Prints, and Drawings Handbook was developed to assist nuclear facility operating contractors in providing operators, maintenance personnel, and technical staff with the necessary fundamentals training to ensure a basic understanding of engineering prints, their use, and their function. The handbook includes information on engineering fluid drawings and prints; piping and instrument drawings; major symbols and conventions; electronic diagrams and schematics; logic circuits and diagrams; and fabrication, construction, and architectural drawings. This information will provide personnel with a foundation for reading, interpreting, and using the engineering prints and drawings that are associated with various DOE nuclear facility operations and maintenance.

Not Available

1993-01-01T23:59:59.000Z

90

PRINT, WEB, AND e-NEWS ADVERTISING INSERTION ORDER  

Science Conference Proceedings (OSTI)

PRINT, WEB, AND e-NEWS. ADVERTISING INSERTION ORDER. FAX. Fax this form to: TMS Advertising Sales. Fax: (724) 814-3141. MAIL. Mail this form to:.

91

Dispenser Printed Zinc Microbattery with an Ionic Liquid Gel Electrolyte  

E-Print Network (OSTI)

the electrodes determine a batterys capacity and power. Inthe printed batterys discharge capacity increased more thanrates, the battery will exhibit reduced capacities due to

Ho, Christine Chihfan

2010-01-01T23:59:59.000Z

92

Aerosol Jet Material Deposition for High Resolution Printed ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Aerosol Jet printing, is finding wide use in a number of ... The Aerosol Jet systems deposit a wide variety of functional materials onto a wide...

93

Physics form at arxiv.org e-Print archive  

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

Full text Help pages Go Automated e-print archives Computer Science Mathematics Physics Quantitative Biology Quantitative Finance Statistics Search Form Interface Catchup...

94

Range tomography: combining the practicality of boolean tomography with the resolution of analog tomography  

Science Conference Proceedings (OSTI)

The objective of early network tomography approaches was to produce a point estimate for the performance of each network link (Analog tomography). When it became clear that the previous approach is error-prone in practice, research shifted to Boolean ... Keywords: Network tomography, localization, performance metric

Sajjad Zarifzadeh; Madhwaraj Gowdagere; Constantine Dovrolis

2012-11-01T23:59:59.000Z

95

Internet Printing Protocol/1.1: Model and Semantics  

Science Conference Proceedings (OSTI)

This document is one of a set of documents, which together describe all aspects of a new Internet Printing Protocol (IPP). IPP is an application level protocol that can be used for distributed printing using Internet tools and technologies. This document ...

R. Herriot; R. deBry; S. Isaacson; P. Powell / T. Hastings

2000-09-01T23:59:59.000Z

96

Printed Circuit Board Maintenance, Repair, and Testing Guide  

Science Conference Proceedings (OSTI)

Printed circuit boards (PCBs) are an assembly of electronic and electro-mechanical components, such as relays and switches. The printed circuit (PC) board assembly provides multiple functions based on its application and intended service. It is an integral part of many instruments and/or instrumentation systems.

2003-10-30T23:59:59.000Z

97

Browse by Discipline -- E-print Network Subject Pathways: Plasma...  

Office of Scientific and Technical Information (OSTI)

E-print Network E-print Network Skip to main content Plasma Physics and Fusion Go to Research Groups Preprints Provided by Individual Scientists: A B C D E F G H I J K L M N O P Q...

98

Clean Cities: Clean Cities Print Products and Templates  

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

Print Products and Templates Print Products and Templates Clean Cities has a wide variety of print products, marketing materials, and templates to support your coalition's education and outreach activities. See also logos, graphics, and photos. IdleBox The IdleBox toolkit contains outreach materials and templates to help with your idle-reduction projects. Print Publications Available print materials include the biannual newsletter-Clean Cities Now-and a variety of fact sheets and brochures about the Clean Cities initiative and the technologies in its portfolio. Browse Clean Cities-branded publications Find alternative fuels and advanced vehicle documents on the Alternative Fuels Data Center The Clean Cities Technical Response Service can also help you find the publications you need.

99

Minutes from the March 14, 2013 Printing and Mail Teleconference  

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

March 14, 2013 March 14, 2013 Mail discussion Al Majors is on leave today. Ellsworth Howell Jr. and Tony Nellums are sitting for Al. There are no agenda items for the Mail portion. A discussion period for questions, comments, or suggestions was opened without response Printing discussion Discussed suggestions for reducing printing expenses Presidential Executive Order 13589 and reducing hard copy printing in favor of electronic publishing Sec. 5. Printing. Agencies are encouraged to limit the publication and printing of hard copy documents and to presume that information should be provided in an electronic form, whenever practicable, permitted by law, and consistent with applicable records retention requirements. Agencies should consider using acquisition vehicles developed by the

100

Minutes from the September 15, 2010 Printing and Mail Teleconference  

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

September 15, 2010 Printing and Mail Managers Exchange Forum Teleconference September 15, 2010 Printing and Mail Managers Exchange Forum Teleconference Twenty-four individuals participated in the Printing and Mail Managers Exchange Forum, which included Printing and Mail Managers and Contractors. Comments/Additions to last Months Minutes Dallas Woodruff, Headquarters opened the meeting by thanking everyone for participating in the today's teleconference. Printing Agenda Items... Upcoming FY 2010 Department-wide Three-Year Plan Dallas Woodruff, Headquarters informed the group that the programmer has been making modifications to the spreadsheets such as the narrative section, equipment installed year, sites data consolidation etc. The enhancement to the narrative section will allow sites to enter data into the four narrative sections, which allow

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


101

Minutes from the January 19, 2011 Printing and Mail Teleconference  

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

January 2010 January 2010 Printing and Mail Managers Exchange Forum Teleconference Twenty-one individuals participated in the Printing and Mail Managers Exchange Forum, which included Printing and Mail Managers and Contractors Comments/Additions to last Months Minutes No comments. Printing Agenda Items......... Update on the Department-wide FY-2010 Three-Year Plan Dallas Woodruff, Headquarters in formed the group that the Department-wide Printing and Publishing Activities is currently in the concurrence process. The report is due to congress by February 11, 2011. Mr. Woodruff thanks those that assisted in development of the report and he asked for recommendations on how to make the data submission more users friendly. Mr Woodruff also asked members to share any concern or problems they experienced regarding to using the Excel

102

Pennsylvania Company Develops Solar Cell Printing Technology | Department  

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

Pennsylvania Company Develops Solar Cell Printing Technology Pennsylvania Company Develops Solar Cell Printing Technology Pennsylvania Company Develops Solar Cell Printing Technology April 15, 2010 - 4:20pm Addthis Joshua DeLung What does this project do? The technology uses Plextronics' conductive inks that can be printed by manufacturers worldwide to make solar cells, potentially as easily as they might print a newspaper. This method is much less expensive than many others in terms of raw materials and manufacturing costs. Pittsburgh-based Plextronics, plans to commercialize low-cost solar power globally with its conductive ink technologies, a goal that has been helped by a government incubator program focused on finding marketable prototypes by 2012. "For any technology to be truly successful, you have to enable a new

103

Multi-Layer Inkjet Printed Contacts to Si  

DOE Green Energy (OSTI)

Ag, Cu, and Ni metallizations were inkjet printed with near vacuum deposition quality. The approach developed can be easily extended to other conductors such as Pt, Pd, Au, etc. Thick highly conducting lines of Ag and Cu demonstrating good adhesion to glass, Si, and printed circuit board (PCB) have been printed at 100-200 deg C in air and N2 respectively. Ag grids were inkjet-printed on Si solar cells and fired through the silicon nitride AR layer at 850 deg C, resulting in 8% cells. Next generation inks, including an ink that etches silicon nitride, have now been developed. Multi-layer inkjet printing of the etching ink followed by Ag ink produced contacts under milder conditions and gave solar cells with efficiencies as high as 12%.

Curtis, C. J.; van Hest, M.; Miedaner, A.; Kaydanova, T.; Smith, L.; Ginley, D. S.

2005-11-01T23:59:59.000Z

104

E-print Network : Your Selections  

Office of Scientific and Technical Information (OSTI)

Your Selections Back To Previous Page Selections - of First Page Previous Page Next Page Last Page Back To Previous Page You have 0 selections. Click the checkboxes clipping.addClipping on the results or alert results pages to add to your selections. Some links on this page may take you to non-federal websites. Their policies may differ from this site. U.S. Department of Energy U.S. Department of Energy Office of Science Office of Scientific and Technical Information Website Policies/Important Links Science Accelerator science.gov WorldWideScience.org Deep Web Technologies Email Results Use this form to email your search results * Email this to: * Your Name: Comments: URL only?: Number of results: 10 20 50 100 200 All Email Format: HTML TEXT * Required field Print Results

105

Computed Tomography Status  

DOE R&D Accomplishments (OSTI)

Computed tomography (CT) is a relatively new radiographic technique which has become widely used in the medical field, where it is better known as computerized axial tomographic (CAT) scanning. This technique is also being adopted by the industrial radiographic community, although the greater range of densities, variation in samples sizes, plus possible requirement for finer resolution make it difficult to duplicate the excellent results that the medical scanners have achieved.

Hansche, B. D.

1983-00-00T23:59:59.000Z

106

Computed tomography status  

SciTech Connect

Computed tomography (CT) is a relatively new radiographic technique which has become widely used in the medical field, where it is better known as computerized axial tomographic (CAT) scanning. This technique is also being adopted by the industrial radiographic community, although the greater range of densities, variation in samples sizes, plus possible requirement for finer resolution make it difficult to duplicate the excellent results that the medical scanners have achieved.

Hansche, B.D.

1983-01-01T23:59:59.000Z

107

Experimental Adaptive Bayesian Tomography  

E-Print Network (OSTI)

We report an experimental realization of an adaptive quantum state tomography protocol. Our method takes advantage of a Bayesian approach to statistical inference and is naturally tailored for adaptive strategies. For pure states we observe close to 1/N scaling of infidelity with overall number of registered events, while best non-adaptive protocols allow for $1/\\sqrt{N}$ scaling only. Experiments are performed for polarization qubits, but the approach is readily adapted to any dimension.

Konstantin Kravtsov; Stanislav Straupe; Igor Radchenko; Neil Houlsby; Sergey Kulik

2013-03-07T23:59:59.000Z

108

Frequently Asked Questions (FAQ) for the E-print Network -- Energy,  

Office of Scientific and Technical Information (OSTI)

Frequently Asked Questions Frequently Asked Questions Table of Contents General Information What are e-prints? Are e-prints and preprints the same thing? What is the E-print Network: Research Communications for Scientists and Engineers? Who uses the E-print Network? How does the E-print Network help the user? How the E-print Network Works What's in the E-print Network? What are the criteria for inclusion in the E-print Network? How does the E-print Network function? What is E-print Network's search architecture? An overview of tools and services A note to site owners General Information Q: What are e-prints? A: E-prints are scholarly and professional works electronically produced and shared by researchers with the intent of communicating research findings to colleagues. They may include preprints, reprints,

109

Minutes from the February 23, 2012 Printing and Mail Teleconference  

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

Printing and Mail Managers Exchange Forum Teleconference February 23, 2012 Participants: Headquarters (5) National Energy Technology Laboratory, PA National Security Complex Y-12 (2) Oak Ridge National Laboratory Y-12 Site Office (2) Hanford Site Office Oak Ridge Association University Oak Ridge Operations Office BWXT Pantex Site Office JanTec Corporation, Richland, Washington Los Alamos National Laboratory Chicago Office Bettis Atomic Power Laboratory National Security Technology C1, Las Vegas SLAC National Accelerator Laboratory Comments/Additions to minutes from last meeting. There were no comments. Printing Agenda Items......... Update on the Department-wide Printing and Publishing Activities Three-Year Plan (2013-2015).

110

Ink Jet Printing Approaches to Solar Cell Contacts  

DOE Green Energy (OSTI)

We are developing inkjet printing as a low cost, high through-put approach to the deposition of front contacts for Si solar cells. High deposition rates of 1m per printing pass were achieved with a new metalorganic ink composed of silver (trifluoroacetate) in ethylene glycol. The printing conditions were optimized to achieve a relatively high line resolution of 120 m. The optimal parameters for the piezoelectric inkjet were a pulse frequency of 50 Hz and pulse amplitude of 25 V. The best resolution and the line quality were achieved at a substrate temperature of 180 C and drop separation of 40 m.

Kaydanova, T.; Miedaner, A.; Curtis, C.; Perkins, J.; Alleman, J.; Ginley, D.

2003-05-01T23:59:59.000Z

111

Positron Emission Tomography (PET)  

DOE R&D Accomplishments (OSTI)

Positron emission tomography (PET) assesses biochemical processes in the living subject, producing images of function rather than form. Using PET, physicians are able to obtain not the anatomical information provided by other medical imaging techniques, but pictures of physiological activity. In metaphoric terms, traditional imaging methods supply a map of the body's roadways, its, anatomy; PET shows the traffic along those paths, its biochemistry. This document discusses the principles of PET, the radiopharmaceuticals in PET, PET research, clinical applications of PET, the cost of PET, training of individuals for PET, the role of the United States Department of Energy in PET, and the futures of PET.

Welch, M. J.

1990-01-00T23:59:59.000Z

112

Character Segmentation in Highly Blurred Ancient Printed Documents  

Science Conference Proceedings (OSTI)

Character segmentation, which is a fundamental preliminary step for character recognition, is particularly critic in the case of ancient printed documents, where several degradation processes may cause the characters to touch and merge one another. In ...

Anna Tonazzini; Luigi Bedini

1999-09-01T23:59:59.000Z

113

Browse by Discipline -- E-print Network Subject Pathways: Fission...  

Office of Scientific and Technical Information (OSTI)

Fission and Nuclear Technologies A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z Go to Research Collections E-prints Provided...

114

Dai Nippon Printing Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Dai Nippon Printing Co Ltd Dai Nippon Printing Co Ltd Jump to: navigation, search Name Dai Nippon Printing Co Ltd Place Shinjuku-ku, Tokyo, Japan Zip 162-8001 Sector Solar Product Print conglomerate which is involved with manufacturing components for fuel cells and solar sectors. Coordinates 35.7015°, 139.709244° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.7015,"lon":139.709244,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

115

Web-Based Integration of Printed and Digital Information  

Science Conference Proceedings (OSTI)

The affordances of paper have ensured its retention as a key information medium, in spite of dramatic increases in the use of digital technologies for information storage, processing and delivery. Recent developments in paper, printing and wand technologies ...

Moira C. Norrie; Beat Signer

2003-01-01T23:59:59.000Z

116

Metallizations by Direct-Write Inkjet Printing: Preprint  

DOE Green Energy (OSTI)

Presented at the 2001 NCPV Program Review Meeting: Direct-write technologies offer the potential for low-cost, materials-efficient deposition of contact metallizations for PV. Direct-write technologies offer the potential for low-cost materials-efficient deposition of contact metallizations for photovoltaics. We report on the inkjet printing of metal organic decomposition (MOD) inks with and without nanoparticle additions. Near-bulk conductivity of printed and sprayed metal films has been achieved for Ag and Ag nanocomposites. Good adhesion and ohmic contacts with a measured contact resistance of 400 {mu}{Omega} {center_dot} cm{sup 2} have been observed between the sprayed silver films and a heavily doped n-type layer of Si. Inkjet printed films show adhesion differences as a function of the process temperature and solvent. Silver lines with good adhesion and conductivity have been printed on glass with 100 {micro}m resolution.

Curtis, C. J.; Rivkin, T.; Miedaner, A.; Alleman, J.; Perkins, J.; Smith, L.; Ginley, D.

2001-10-01T23:59:59.000Z

117

Browse by Discipline -- E-print Network Subject Pathways: Mathematics...  

Office of Scientific and Technical Information (OSTI)

Energy Storage, Conversion and Utilization A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z Go to Research Collections E-prints...

118

Tungsten carbide-cobalt by Three Dimensional Printing  

E-Print Network (OSTI)

Three Dimensional Printing is an additive manufacturing process for rapid prototyping ceramic and metallic parts [Sachs, et al, 1990]. Green (not sintered) tungsten carbide-cobalt parts must have a density greater than 50% ...

Kelley, Andrew, III

1998-01-01T23:59:59.000Z

119

Direct printing of lead zirconate titanate thin films  

E-Print Network (OSTI)

Thus far, use of lead zirconate titanate (PZT) in MEMS has been limited due to the lack of process compatibility with existing MEMS manufacturing techniques. Direct printing of thin films eliminates the need for photolithographic ...

Bathurst, Stephen, 1980-

2008-01-01T23:59:59.000Z

120

Browse by Discipline -- E-print Network Subject Pathways: Renewable...  

Office of Scientific and Technical Information (OSTI)

Fission and Nuclear Technologies A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z Go to Research Collections E-prints Provided...

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


121

Browse by Discipline -- E-print Network Subject Pathways: Plasma...  

Office of Scientific and Technical Information (OSTI)

Plasma Physics and Fusion A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z Go to Research Collections E-prints Provided by...

122

Proton computed tomography  

SciTech Connect

The use of protons or other heavy charged particles instead of x rays in computed tomography (CT) is explored. The results of an experimental implementation of proton CT are presented. High quality CT reconstructions are obtained at an average dose reduction factor compared with an EMI 5005 x-ray scanner of 10:1 for a 30-cm-diameter phantom and 3.5:1 for a 20-cm diameter. The spatial resolution is limited by multiple Coulomb scattering to about 3.7 mm FWHM. Further studies are planned in which proton and x-ray images of fresh human specimens will be compared. Design considerations indicate that a clinically useful proton CT scanner is eminently feasible.

Hanson, K.M.

1978-01-01T23:59:59.000Z

123

3D printing rises to the occasion | ornl.gov  

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

Features Features 2014 2013 2012 2011 2010 News Home | ORNL | News | Features | 2013 SHARE 3D printing rises to the occasion ORNL group shows how it's done, one layer at a time A perforated metal box produced by an Arcam 3D printer. This detailed A perforated metal box produced by an Arcam 3D printer. This detailed "calibration" part illustrates some of the versatility of 3D printing. Photo: Jason Richards (hi-res image) Things have come a long way since the mid-1980s when 3D Systems cofounder Chuck Hull worked out the technology to print objects in three dimensions, one very thin layer at a time. Hull called his new technology "stereolithography." In it, a guided beam of ultraviolet light is focused on a vat of liquid polymer, solidifying areas where it hits. When one layer is complete, the

124

Optical systems fabricated by printing-based assembly  

DOE Patents (OSTI)

Provided are optical devices and systems fabricated, at least in part, via printing-based assembly and integration of device components. In specific embodiments the present invention provides light emitting systems, light collecting systems, light sensing systems and photovoltaic systems comprising printable semiconductor elements, including large area, high performance macroelectronic devices. Optical systems of the present invention comprise semiconductor elements assembled, organized and/or integrated with other device components via printing techniques that exhibit performance characteristics and functionality comparable to single crystalline semiconductor based devices fabricated using conventional high temperature processing methods. Optical systems of the present invention have device geometries and configurations, such as form factors, component densities, and component positions, accessed by printing that provide a range of useful device functionalities. Optical systems of the present invention include devices and device arrays exhibiting a range of useful physical and mechanical properties including flexibility, shapeability, conformability and stretchablity.

Rogers, John (Champaign, IL); Nuzzo, Ralph (Champaign, IL); Meitl, Matthew (Durham, NC); Menard, Etienne (Durham, NC); Baca, Alfred J. (Urbana, IL); Motala, Michael (Champaign, IL); Ahn, Jong-Hyun (Suwon, KR); Park, Sang-II (Savoy, IL); Yu; Chang-Jae (Urbana, IL); Ko, Heung-Cho (Gwangju, KR); Stoykovich; Mark (Dover, NH); Yoon, Jongseung (Urbana, IL)

2011-07-05T23:59:59.000Z

125

Toward integrated PV panels and power electronics using printing technologies  

SciTech Connect

In this paper, we review the latest developments in the area of printing technologies with an emphasis on the fabrication of control-embedded photovoltaics (PV) with on-board active and passive devices. We also review the use of power converters and maximum power point tracking (MPPT) circuits with PV panels. Our focus is on the investigation of the simplest implementations of such circuits in view of their integration with solar cells using printing technologies. We see this concept as potentially enabling toward further cost reduction. Besides a discussion as to feasibility, we shall also present some projections and guidelines toward possible integration. (author)

Ababei, Cristinel; Yuvarajan, Subbaraya [Electrical and Computer Engineering Department, North Dakota State University, Fargo, ND 58108 (United States); Schulz, Douglas L. [Center for Nanoscale Science and Engineering, North Dakota State University, Fargo, ND 58102 (United States)

2010-07-15T23:59:59.000Z

126

Leaching Studies for Metals Recovery from Waste Printed Wiring ...  

Science Conference Proceedings (OSTI)

Presentation Title, Leaching Studies for Metals Recovery from Waste Printed Wiring ... of the Chemical Changes and Surface Properties of Carbonated Waste Cement ... Flux for Basic Oxygen Steel Making Using Waste Oxides of Steel Plant ... Heat Treatment of Black Dross for the Production of a Value Added Material - A

127

Print-and-Peel Fabrication for Microfluidics: Whats in it for Biomedical Applications?  

E-Print Network (OSTI)

Solid-object printers have the capability for 3D printing,single-step 3D molding without a solid-object printer. 33,763D) printing of masters using a solid-object printer.

Thomas, Marlon S.; Millare, Brent; Clift, Joseph M.; Bao, Duoduo; Hong, Connie; Vullev, Valentine I.

2010-01-01T23:59:59.000Z

128

Evaporative printing of organic materials and metals and development of organic memories  

E-Print Network (OSTI)

The advantages of directed printing make it the ideal fabrication tool for the ubiquitous electronic technologies of the future. However, direct printing techniques such as ink-jet technology, are currently limited to ...

Kang, Sung Hoon, 1974-

2004-01-01T23:59:59.000Z

129

ENG-Canada-USA Government Procurement (clean 11 Feb 2010 printed...  

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

ENG-Canada-USA Government Procurement (clean 11 Feb 2010 printed) ENG-Canada-USA Government Procurement (clean 11 Feb 2010 printed) ENG-Canada-USA Government Procurement (clean 11...

130

Resistivity Tomography | Open Energy Information  

Open Energy Info (EERE)

Resistivity Tomography Resistivity Tomography Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Resistivity Tomography Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Resistivity Log Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Cost Information Low-End Estimate (USD): 60.986,098 centUSD 0.061 kUSD 6.098e-5 MUSD 6.098e-8 TUSD / foot Median Estimate (USD): 76.227,622 centUSD 0.0762 kUSD 7.622e-5 MUSD 7.622e-8 TUSD / foot High-End Estimate (USD): 106.7110,671 centUSD 0.107 kUSD 1.0671e-4 MUSD 1.0671e-7 TUSD / foot Time Required Low-End Estimate: 1 days0.00274 years

131

SUBJECT: Effective Date: Policy Number: Printing Services 4-18-07 3-302  

E-Print Network (OSTI)

for quotation and execution. DEFINITIONS: Printing services: the process of printing ink or toner on paper for any black and white and full color printing of letterhead, envelopes, brochures, newsletters, memo-come, first-served basis. Exceptions can be made for priority requests, but a rush charge may be added

Glebov, Leon

132

The 1981 ocean tomography experiment: Preliminary results  

Science Conference Proceedings (OSTI)

Preliminary results from a 1981 test ocean acoustic tomography experiment are presented. The system deployed in the southern North Atlantic

The Ocean Tomography Group; R. C. Spindel

1982-01-01T23:59:59.000Z

133

Multi-Layer Inkjet Printed Contacts for Si Solar Cells (Poster)  

DOE Green Energy (OSTI)

The objective of this report is to develop inkjet printing (including tools, inks, and processing conditions) for high-quality Ag contacts for Si solar cells. The conclusions are: (1) Tools and inks for the atmospheric inkjet printing of Ag metallization for Si solar cells have been developed. (2) Line widths, conductivities and thicknesses comparable to, or better than, those produced by screen printing. (3) A new fire-through ink and layered printing were found to decrease the processing temperature for contact formation to as low as 650 C and improve printed cell performance.

Curtis, C. J.; van hest, M. F. A. M.; Miedaner, A.; Kaydanova, T.; Smith, L.; Ginley, D. S.

2006-05-01T23:59:59.000Z

134

Transcript: OSTI's E-print Network Now Boasts Close to 1 Million Documents,  

Office of Scientific and Technical Information (OSTI)

Transcript: OSTI's E-print Network Now Boasts Close to 1 Million Documents, Transcript: OSTI's E-print Network Now Boasts Close to 1 Million Documents, Office of Scientific and Technical Information, U.S. Department of Energy, www.osti.gov March 2007 E-Print Network Listen Now Where can you find full-text access to approximately 1 million scientific e-print documents? Where can you gain entry to more than 22,000 scientific Web sites organized by discipline, and link to more than 2,900 relevant scientific societies? Visit the E-print Network. The E-print Network is rapidly approaching 1 million documents. The scientific and technical information for this vast, integrated communications hub was created by scientists and research engineers active in their respective fields. E-print Network is intended for use by other scientists, engineers, and students at advanced levels.

135

Earthquake Forecast via Neutrino Tomography  

E-Print Network (OSTI)

We discuss the possibility of forecasting earthquakes by means of (anti)neutrino tomography. Antineutrinos emitted from reactors are used as a probe. As the antineutrinos traverse through a region prone to earthquakes, observable variations in the matter effect on the antineutrino oscillation would provide a tomography of the vicinity of the region. In this preliminary work, we adopt a simplified model for the geometrical profile and matter density in a fault zone. We calculate the survival probability of electron antineutrinos for cases without and with an anomalous accumulation of electrons which can be considered as a clear signal of the coming earthquake, at the geological region with a fault zone, and find that the variation may reach as much as 3% for $\\bar \

Bin Wang; Ya-Zheng Chen; Xue-Qian Li

2010-01-17T23:59:59.000Z

136

Recycling of WEEE: Characterization of spent printed circuit boards from mobile phones and computers  

SciTech Connect

Highlights: > This paper presents new and important data on characterization of wastes of electric and electronic equipments. > Copper concentration is increasing in mobile phones and remaining constant in personal computers. > Printed circuit boards from mobile phones and computers would not be mixed prior treatment. - Abstract: This paper presents a comparison between printed circuit boards from computers and mobile phones. Since printed circuits boards are becoming more complex and smaller, the amount of materials is constantly changing. The main objective of this work was to characterize spent printed circuit boards from computers and mobile phones applying mineral processing technique to separate the metal, ceramic, and polymer fractions. The processing was performed by comminution in a hammer mill, followed by particle size analysis, and by magnetic and electrostatic separation. Aqua regia leaching, loss-on-ignition and chemical analysis (inductively coupled plasma atomic emission spectroscopy - ICP-OES) were carried out to determine the composition of printed circuit boards and the metal rich fraction. The composition of the studied mobile phones printed circuit boards (PCB-MP) was 63 wt.% metals; 24 wt.% ceramics and 13 wt.% polymers; and of the printed circuit boards from studied personal computers (PCB-PC) was 45 wt.% metals; 27 wt.% polymers and ceramics 28 wt.% ceramics. The chemical analysis showed that copper concentration in printed circuit boards from personal computers was 20 wt.% and in printed circuit boards from mobile phones was 34.5 wt.%. According to the characteristics of each type of printed circuit board, the recovery of precious metals may be the main goal of the recycling process of printed circuit boards from personal computers and the recovery of copper should be the main goal of the recycling process of printed circuit boards from mobile phones. Hence, these printed circuit boards would not be mixed prior treatment. The results of this paper show that copper concentration is increasing in mobile phones and remaining constant in personal computers.

Yamane, Luciana Harue, E-mail: lucianayamane@uol.com.br [Department of Metallurgical and Materials Engineering, University of Sao Paulo, Av. Prof. Mello Moraes, 2463 Sao Paulo, SP 05508-030 (Brazil); Tavares de Moraes, Viviane, E-mail: tavares.vivi@gmail.com [Department of Metallurgical and Materials Engineering, University of Sao Paulo, Av. Prof. Mello Moraes, 2463 Sao Paulo, SP 05508-030 (Brazil); Crocce Romano Espinosa, Denise, E-mail: espinosa@usp.br [Department of Metallurgical and Materials Engineering, University of Sao Paulo, Av. Prof. Mello Moraes, 2463 Sao Paulo, SP 05508-030 (Brazil); Soares Tenorio, Jorge Alberto, E-mail: jtenorio@usp.br [Department of Metallurgical and Materials Engineering, University of Sao Paulo, Av. Prof. Mello Moraes, 2463 Sao Paulo, SP 05508-030 (Brazil)

2011-12-15T23:59:59.000Z

137

Non-Contact Printed Aluminum Metallization of Si Photovoltaic Devices: Preprint  

DOE Green Energy (OSTI)

Alternative solution-based techniques such as aerosol jet printing offer the dual benefits of contactless pattern deposition and high material utilization. We have used aerosol jet printing to investigate non-contact printed Al metal ink as a replacement for screen printed Al back contacts on wafer Si solar cells. This particle-based ink can be prepared at high loadings of 60 weight % metal, which enables rapid deposition of 1 - 10 um thick lines. Al lines printed on Si wafers and heated between 550 and 800 degrees C form low resistance contacts suitable for current extraction. The effectiveness of these printed Al back contacts has further been demonstrated by incorporating them into a series of 21 cm2 crystalline Si solar cells that produced a champion power conversion efficiency of 13%.

Platt, H. A. S.; van Hest, M. F. A. M.; Li, Y.; Novak, J. P.

2012-06-01T23:59:59.000Z

138

V-148: Novell iPrint Client Unspecified Buffer Overflow Vulnerability |  

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

8: Novell iPrint Client Unspecified Buffer Overflow 8: Novell iPrint Client Unspecified Buffer Overflow Vulnerability V-148: Novell iPrint Client Unspecified Buffer Overflow Vulnerability May 3, 2013 - 6:00am Addthis PROBLEM: Novell iPrint Client Unspecified Buffer Overflow Vulnerability PLATFORM: Novell iPrint Client 5.x ABSTRACT: A vulnerability has been reported in Novell iPrint Client, which can be exploited by malicious people to compromise a user's system REFERENCE LINKS: Secunia Advisory SA53261 Novell KB 7012344 Novell KB 7008708 CVE-2013-1091 IMPACT ASSESSMENT: High DISCUSSION: The vulnerability is caused due to an unspecified error and can be exploited to cause a stack-based buffer overflow. IMPACT: Successful exploitation may allow execution of arbitrary code SOLUTION: Vendor recommendation is to update to Version 5.90

139

Atom Probe Tomography and Transmission Electron Microscopy ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Atom probe tomography (APT) and analytical transmission .... of a Leaking Type 316 Socket Weld in a Boron Injection Tank Sampling Line.

140

Crosswell Seismic Tomography | Open Energy Information  

Open Energy Info (EERE)

2013 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Crosswell Seismic Tomography Citation Schlumberger. Crosswell Seismic...

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


141

Prospects for Atomic-Scale Tomography  

Science Conference Proceedings (OSTI)

Abstract Scope, Atomic-scale tomography (AST) may be defined as any technique that ... Initial Age Hardening and Nanostructural Evolution in a Cu-Ni-P Alloy.

142

Imaging and sensing based on muon tomography  

SciTech Connect

Techniques, apparatus and systems for detecting particles such as muons for imaging applications. Subtraction techniques are described to enhance the processing of the muon tomography data.

Morris, Christopher L; Saunders, Alexander; Sossong, Michael James; Schultz, Larry Joe; Green, J. Andrew; Borozdin, Konstantin N; Hengartner, Nicolas W; Smith, Richard A; Colthart, James M; Klugh, David C; Scoggins, Gary E; Vineyard, David C

2012-10-16T23:59:59.000Z

143

Radiation interactions for tomography. Revision 1  

SciTech Connect

There are new requirements emerging in the field of tomography: the need for spatial resolution in the micrometre range, atomic species specificity, and quantitative density discrimination.

Zolnay, A.S.

1985-05-20T23:59:59.000Z

144

Get scientific E-prints | OSTI, US Dept of Energy, Office of...  

Office of Scientific and Technical Information (OSTI)

Energy Science and Technology Software Center E-print Network Information Bridge LEDP National Library of Energy OSTIblog Science.gov Science Accelerator Science Conference...

145

Exploring the emerging design territory of construction 3D printing project led architectural research.  

E-Print Network (OSTI)

??3D printing techniques (also known as additive fabrication) are maturing and increasingly being used as an alternative means for niche product manufacturing. These fabrication techniques (more)

Gardiner, J

2011-01-01T23:59:59.000Z

146

E-print Network Web Log News: Research Communications for Scientists...  

Office of Scientific and Technical Information (OSTI)

Description This Web Log provides the latest information about changes to E-print Network - its content, features, and functionality - as well as news or information of interest...

147

Procedures for preparation, printing, and distribution of UMTRA Project National Environmental Policy Act documents  

SciTech Connect

This paper discusses the procedures for preparation, printing and distribution of Uranium Mill Tailings Remedial Action (UMTRA) Project National Environmental Policy Act documents. (KJD)

Not Available

1988-08-01T23:59:59.000Z

148

NEUTRON IMAGING, RADIOGRAPHY AND TOMOGRAPHY.  

SciTech Connect

Neutrons are an invaluable probe in a wide range of scientific, medical and commercial endeavors. Many of these applications require the recording of an image of the neutron signal, either in one-dimension or in two-dimensions. We summarize the reactions of neutrons with the most important elements that are used for their detection. A description is then given of the major techniques used in neutron imaging, with emphasis on the detection media and position readout principle. Important characteristics such as position resolution, linearity, counting rate capability and sensitivity to gamma-background are discussed. Finally, the application of a subset of these instruments in radiology and tomography is described.

SMITH,G.C.

2002-03-01T23:59:59.000Z

149

Application of Computed Tomography to Microgravity Combustion  

Science Conference Proceedings (OSTI)

This paper describes applications of computed tomography (CT) to combustion phenomena under microgravity conditions. Infrared Thermography (IT) has been considered as a promising method for two-dimensional measurement of flames. We have applied IT to ... Keywords: computed tomography, diffusion flame, infrared thermography, microgravity combustion, spectroscopy

H. Sato; K. Itoh; M. Shimizu; S. Hayashi; Y. Fujimori; K. Maeno

1999-12-01T23:59:59.000Z

150

Simultaneous CT and SPECT tomography using CZT detectors - Energy ...  

A method for simultaneous transmission x-ray computed tomography (CT) and single photon emission tomography (SPECT) comprises the steps of: injecting a subject with a ...

151

Transfer printing of patterned metal films using parylene C coated surfaces  

Science Conference Proceedings (OSTI)

Successful transfer printing of aluminum (Al), copper (Cu), silver (Ag), nickel (Ni) and gold (Au) films is demonstrated. Previously, Al, Cu, Ag, and Ni films have exhibited relatively strong adhesion to silicon (Si) substrates resulting in poor transfer ... Keywords: Flexible electronics, Surface treatments, Transfer printing

J. Bavier; J. Cumings; D. R. Hines

2013-04-01T23:59:59.000Z

152

Bayesian network model of overall print quality: Construction and structural optimisation  

Science Conference Proceedings (OSTI)

Prediction of overall visual quality based on instrumental measurements is a challenging task. Despite the several proposed models and methods, there exists a gap between the instrumental measurements of print and human visual assessment of natural images. ... Keywords: Bayesian networks, Overall visual quality, Print quality assessment, Structural optimisation

Tuomas Eerola; Lasse Lensu; Joni-Kristian Kamarainen; Tuomas Leisti; Risto Ritala; Gte Nyman; Heikki Klviinen

2011-08-01T23:59:59.000Z

153

E-print Network Help -- Energy, science, and technology for the research  

Office of Scientific and Technical Information (OSTI)

Help Help Basic Search ♦ Advanced Search ♦ Search Results ♦ Selecting and Exporting Results ♦ Source Status Spelling Suggestion ♦ Search Tips ♦ Content and Search Power ♦ Sharing a Page ♦ Disciplines ♦ Scientific Societies Database Collection Descriptions From the E-print Network, users can Search e-prints on multiple websites and databases, browse e-prints by Disciplines, browse a list of Scientific Societies, and receive Alerts for new e-prints added to the E-print Network. See Alerts Help for Information on the Alerts Service Basic Search Try our Basic Search basic search Just type in your key word(s), like "global warming", and select Search . You'll get results ranked by relevance. The higher the number of stars, stars the more relevant the document is to your query.

154

E-print Network Alerts -- Energy, science, and technology for the research  

Office of Scientific and Technical Information (OSTI)

E-print Alerts E-print Alerts Login User Name: Enter User Name Password: Forgot username or password? Login The E-print Alerts feature is a service that will automatically notify you when new e-print information is available in your specific areas of interest. Simply register for the service and then create a search strategy, which will be matched automatically against each new weekly update. Patrons will receive the results of the alert via e-mail. If you are a NEW PATRON, learn how to set up E-print Alerts to meet your needs. If you are an existing patron, enter your user name and password in the box on the right, then press the login button. You may review or modify your search, add a new search, and see search results. Some links on this page may take you to non-federal websites. Their

155

Printing Tiny Batteries | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

Stories of Discovery & Innovation: "Printing" Stories of Discovery & Innovation: "Printing" Tiny Batteries? Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events EFRC News Observing the Sparks of Life EFRC Events DOE Announcements Publications Contact BES Home 06.26.13 Stories of Discovery & Innovation: "Printing" Tiny Batteries? Print Text Size: A A A Subscribe FeedbackShare Page Researchers use sophisticated 3D printing techniques to create batteries the size of a grain of sand. This work, featured in the Office of Science's Stories of Discovery & Innovation, was supported in part by the Light-Materials Interactions for Energy Conversion (LMI), an EFRC led by Harry Atwater at the California Institute of Technology. Last modified: 6/26/2013 8:53:17

156

Multi-Layer Inkjet Printed Contacts for Silicon Solar Cells: Preprint  

DOE Green Energy (OSTI)

Ag, Cu, and Ni metallizations were inkjet printed with near vacuum deposition quality. The approach developed can be easily extended to other conductors such as Pt, Pd, Au, etc. Thick highly conducting lines of Ag and Cu demonstrating good adhesion to glass, Si, and printed circuit board (PCB) have been printed at 100-200 C in air and N2 respectively. Ag grids were inkjet-printed on Si solar cells and fired through the silicon nitride AR layer at 850 C, resulting in 8% cells. Next generation inks, including an ink that etches silicon nitride, have now been developed. Multi-layer inkjet printing of the etching ink followed by Ag ink produced contacts under milder conditions and gave solar cells with efficiencies as high as 12%.

Curtis, C. J.; van hest, M.; Miedaner, A.; Kaydanova, T.; Smith, L.; Ginley, D. S.

2006-05-01T23:59:59.000Z

157

I United States Government Printing Office SUPERINTENDENT OF WCUMENTS  

Office of Legacy Management (LM)

onSree;sional atecord onSree;sional atecord I United States Government Printing Office SUPERINTENDENT OF WCUMENTS Wash~ngtm. D.C 20402 OFFEIAL BUSINESS Penalty for prwate use. 9300 Congressmnal Record (USPS 087-390) United States of America . :- PROCEEDINGS AND DEBATES OF THE 98' hCONGRESS, FIRST SESSION 0 * U.S -C3 Postage and Fees Pad U S Governme3n7t5Prmt~ng Office SECOND CLASS NEWSPAPER H-4578 ' CQNGRESSIONAL RECORD - HOUSE June 28, 1983 I H.J. Res. 273: Mr. BOLAND, Mr. WAXMAN, Mr. Oeeasrrk. Mr. BEDELL. Mr. BONER of Tennessee, Mr. OWENS, Mr. DAUB. Mr. CONTE. Mr. RA~ALL. Mr. GRAY, Mr. VANDER JAGT. Mr. TRAXLER. and Mr. VENTO. H. Con. Res. 107: Mr. KASICH. Mr. AuCO~N, Mr. CARPER, and Mr. BCHWER. H. Con. Res. 118: Mr. FISH. Mr. &INTO& Mr. KILDEE. Mr. SOLARZ, Mr. BRITT. Mr.

158

Printed Circuit Board Metal Powder Filters for Low Electron Temperatures  

E-Print Network (OSTI)

We report the characterisation of printed circuit boards (PCB) metal powder filters and their influence on the effective electron temperature which is as low as 22 mK for a quantum dot in a silicon MOSFET structure in a dilution refrigerator. We investigate the attenuation behaviour (10 MHz- 20 GHz) of filter made of four metal powders with a grain size below 50 um. The room-temperature attenuation of a stainless steel powder filter is more than 80 dB at frequencies above 1.5 GHz. In all metal powder filters the attenuation increases with temperature. Compared to classical powder filters, the design presented here is much less laborious to fabricate and specifically the copper powder PCB-filters deliver an equal or even better performance than their classical counterparts.

Filipp Mueller; Raymond N. Schouten; Matthias Brauns; Tian Gang; Wee Han Lim; Nai Shyan Lai; Andrew S. Dzurak; Wilfred G. van der Wiel; Floris A. Zwanenburg

2013-04-11T23:59:59.000Z

159

Design and development of high precision elastomeric-stamp wrapping system for roll-to-roll multi-layer microcontact printing  

E-Print Network (OSTI)

Microcontact printing is an emerging printing technique that could potentially find application in the electronics industry. High-speed roll-to-roll equipment was built at Nano Terra, Inc in 2008, for microcontact printing. ...

Datar, Charudatta Achyut

2009-01-01T23:59:59.000Z

160

Characterization of DuPont 9015, aqueous processable dry film photoresist for printed wiring boards. Topical report  

SciTech Connect

This report describes the evaluation of DuPont`s Riston 9015, fully aqueous processable dry film photoresist as a mask for gold plating, tin/lead plating, and print and etch patterning for printed circuit board products.

Goldammer, S.

1995-04-01T23:59:59.000Z

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


161

Axial Tomography from Digitized Real Time Radiography  

DOE R&D Accomplishments (OSTI)

Axial tomography from digitized real time radiographs provides a useful tool for industrial radiography and tomography. The components of this system are: x-ray source, image intensifier, video camera, video line extractor and digitizer, data storage and reconstruction computers. With this system it is possible to view a two dimensional x-ray image in real time at each angle of rotation and select the tomography plane of interest by choosing which video line to digitize. The digitization of a video line requires less than a second making data acquisition relatively short. Further improvements on this system are planned and initial results are reported.

Zolnay, A. S.; McDonald, W. M.; Doupont, P. A.; McKinney, R. L.; Lee, M. M.

1985-01-18T23:59:59.000Z

162

Axial tomography from digitized real time radiography  

SciTech Connect

Axial tomography from digitized real time radiographs provides a useful tool for industrial radiography and tomography. The components of this system are: x-ray source, image intensifier, video camera, video line extractor and digitizer, data storage and reconstruction computers. With this system it is possible to view a two dimensional x-ray image in real time at each angle of rotation and select the tomography plane of interest by choosing which video line to digitize. The digitization of a video line requires less than a second making data acquisition relatively short. Further improvements on this system are planned and initial results are reported.

Zolnay, A.S.; McDonald, W.M.; Doupont, P.A.; McKinney, R.L.; Lee, M.M.

1985-01-18T23:59:59.000Z

163

Buried Interface Analysis Using Atom Probe Tomography  

Science Conference Proceedings (OSTI)

Contributions of Atom Probe Tomography to the Understanding of Steels Control of p-n ... Relationships in a Series of Co-Cr-Cu-Fe-Ni-Al High Entropy Alloys.

164

Atom Probe Tomography for Industrial Applications - Programmaster ...  

Science Conference Proceedings (OSTI)

Contributions of Atom Probe Tomography to the Understanding of Steels Control of p-n ... Relationships in a Series of Co-Cr-Cu-Fe-Ni-Al High Entropy Alloys.

165

Apparatus And Method Of Using Flexible Printed Circuit Board In Optical Transceiver Device  

DOE Patents (OSTI)

This invention relates to a flexible printed circuit board that is used in connection with an optical transmitter, receiver or transceiver module. In one embodiment, the flexible printed circuit board has flexible metal layers in between flexible insulating layers, and the circuit board comprises: (1) a main body region orientated in a first direction having at least one electrical or optoelectronic device; (2) a plurality of electrical contact pads integrated into the main body region, where the electrical contact pads function to connect the flexible printed circuit board to an external environment; (3) a buckle region extending from one end of the main body region; and (4) a head region extending from one end of the buckle region, and where the head region is orientated so that it is at an angle relative to the direction of the main body region. The electrical contact pads may be ball grid arrays, solder balls or land-grid arrays, and they function to connect the circuit board to an external environment. A driver or amplifier chip may be adapted to the head region of the flexible printed circuit board. In another embodiment, a heat spreader passes along a surface of the head region of the flexible printed circuit board, and a window is formed in the head region of the flexible printed circuit board. Optoelectronic devices are adapted to the head spreader in such a manner that they are accessible through the window in the flexible printed circuit board.

Anderson, Gene R. (Albuquerque, NM); Armendariz, Marcelino G. (Albuquerque, NM); Bryan, Robert P. (Albuquerque, NM); Carson, Richard F. (Albuquerque, NM); Duckett, III, Edwin B. (Albuquerque, NM); McCormick, Frederick B. (Albuquerque, NM); Peterson, David W. (Sandia Park, NM); Peterson, Gary D. (Albuquerque, NM); Reysen, Bill H. (Lafayette, CO)

2005-03-15T23:59:59.000Z

166

Organ printing: computer-aided jet-based 3D tissue engineering, Trends in Biotechnology 21  

E-Print Network (OSTI)

Tissue engineering technology promises to solve the organ transplantation crisis. However, assembly of vascularized 3D soft organs remains a big challenge. Organ printing, which we define as computer-aided, jet-based 3D tissue-engineering of living human organs, offers a possible solution. Organ printing involves three sequential steps: pre-processing or development of blueprints for organs; processing or actual organ printing; and postprocessing or organ conditioning and accelerated organ maturation. A cell printer that can print gels, single cells and cell aggregates has been developed. Layer-by-layer sequentially placed and solidified thin layers of a thermo-reversible gel could serve as printing paper. Combination of an engineering approach with the developmental biology concept of embryonic tissue fluidity enables the creation of a new rapid prototyping 3D organ printing technology, which will dramatically accelerate and optimize tissue and organ assembly. 'Give us the tools and we will finish the job'-Winston Churchill Although the terms tissue engineering and organ printing were introduced only recently (1987 and 1999 respectively), the study of cell coalescence and tissue assembly has a much longer history and is deeply rooted in developmental biology [1]. The classic work

Vladimir Mironov; Thomas Bol; Thomas Trusk; Gabor Forgacs; Roger; R. Markwald

2003-01-01T23:59:59.000Z

167

Mathematical Problems of Thermoacoustic Tomography  

E-Print Network (OSTI)

Thermoacoustic tomography (TAT) is a newly emerging modality in biomedical imaging. It combines the good contrast of electromagnetic and good resolution of ultrasound imaging. The mathematical model of TAT is the observability problem for the wave equation: one observes the data on a hyper-surface and reconstructs the initial perturbation. In this dissertation, we consider several mathematical problems of TAT. The first problem is the inversion formulas. We provide a family of closed form inversion formulas to reconstruct the initial perturbation from the observed data. The second problem is the range description. We present the range description of the spherical mean Radon transform, which is an important transform in TAT. The next problem is the stability analysis for TAT. We prove that the reconstruction of the initial perturbation from observed data is not Holder stable if some observability condition is violated. The last problem is the speed determination. The question is whether the observed data uniquely determines the ultrasound speed and initial perturbation. We provide some initial results on this issue. They include the unique determination of the unknown constant speed, a weak local uniqueness, a characterization of the non-uniqueness, and a characterization of the kernel of the linearized operator.

Nguyen, Linh V.

2010-08-01T23:59:59.000Z

168

OSTI's E-print Network continues rapid growth | OSTI, US Dept of Energy,  

Office of Scientific and Technical Information (OSTI)

NEWS MEDIA CONTACT: NEWS MEDIA CONTACT: Cathey Daniels, (865) 576-9539 FOR IMMEDIATE RELEASE January 17, 2006 OSTI's E-print Network continues rapid growth Created by scientists for scientists, expanded 39 percent in past year Oak Ridge, TN - The E-print Network (www.osti.gov/eprints), a communications hub created by scientists for scientists worldwide, currently provides full-text searching of more than 730,000 e-print documents from scientific Web sites - an increase of 39 percent since January 2005. More than 100,000 documents were added to the network in the past three months. In addition, this rapidly expanding network provides one-stop browse/search access to more than 19,650 scientific Web sites containing e-prints, as well as deep Web searching across 52 major databases containing close to 20

169

OSTI's E-print Network continues rapid growth | OSTI, US Dept of Energy,  

Office of Scientific and Technical Information (OSTI)

Office of Scientific & Technical Information Office of Scientific & Technical Information NEWS MEDIA CONTACT: Cathey Daniels, (865) 576-9539 FOR IMMEDIATE RELEASE January 17, 2006 OSTI's E-print Network continues rapid growth Created by scientists for scientists, expanded 39 percent in past year Oak Ridge, TN - The E-print Network (www.osti.gov/eprints), a communications hub created by scientists for scientists worldwide, currently provides full-text searching of more than 730,000 e-print documents from scientific Web sites - an increase of 39 percent since January 2005. More than 100,000 documents were added to the network in the past three months. In addition, this rapidly expanding network provides one-stop browse/search access to more than 19,650 scientific Web sites containing e-prints, as well as deep Web searching across 52 major databases containing close to 20

170

Printing Highly-aligned Single-crystalline Organic Electronic Thin Films |  

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

Printing Highly-aligned Single-crystalline Organic Electronic Thin Films Printing Highly-aligned Single-crystalline Organic Electronic Thin Films Monday, September 23, 2013 Organic semiconductor materials have some intriguing advantages compared to their inorganic counterparts: low-cost and versatile manufacturing (e.g. roll-to-roll printing), material abundance and new form factors (e.g. flexible, transparent and stretchable). However, solution-processed organic devices are usually made and optimized with poorly scalable fabrication using lab-based techniques such as spin coating or dip coating. A better route for organic-electronics fabrication is printing, which can potentially realize large-area, high-throughput, low-cost fabrication on an industrial scale. Fluence image FLUENCE: fluid-enhanced crystal engineering. Solution shearing (a) using a

171

Bimetallic bars with local control of composition by three-dimensional printing  

E-Print Network (OSTI)

Three Dimensional Printing (3DP) is a process that enables the fabrication of geometrically complex parts directly from computer-aided design (CAD) models. The success of 3DP as an alternative manufacturing technology to ...

Techapiesancharoenkij, Ratchatee, 1979-

2004-01-01T23:59:59.000Z

172

Nuclear Maintenance Applications Center: Assessment of Printed Circuit Board Diagnostic Techniques  

Science Conference Proceedings (OSTI)

This project evaluated the techniques, theoretical methods, and recommendations made in previous EPRI reports on printed circuit boards (PCBs). The goal was to find techniques to help manage PCB life.

2009-03-31T23:59:59.000Z

173

Development of tissue printed nitrocellulose cards/arrays for real time PCR amplification and detection  

E-Print Network (OSTI)

Tissue print technology allows for the transfer of cellular material from tissue onto a nitrocellulose film for immunocytochemical assays. The MIT BioInstrumentation Laboratory is currently developing a novel cancer marker ...

Chia, Helena Nien-Hwa, 1982-

2004-01-01T23:59:59.000Z

174

Elastomeric contact printing for sub-micron patterning of organic films  

E-Print Network (OSTI)

In this thesis, a novel diffusion-based contact-printing technology is investigated, by which a wide variety of low molecular weight organic materials can be patterned without added temperature, pressure, or chemical ...

Ramanan, Sulinya

2012-01-01T23:59:59.000Z

175

Deposition of colloidal quantum dots by microcontact printing for LED display technology  

E-Print Network (OSTI)

This thesis demonstrates a new deposition method of colloidal quantum dots within a quantum dot organic light-emitting diode (QD-LED). A monolayer of quantum dots is microcontact printed as small as 20 ,Lm lines as well ...

Kim, LeeAnn

2006-01-01T23:59:59.000Z

176

Prints and copies Black/white XEROX PRINTERS Paper type white  

E-Print Network (OSTI)

Prints and copies Black/white XEROX PRINTERS A4 A3 Paper type white 80 gram one-sided 0,04 0 glossy 0,15 coloured paper 80 gram 0,03 0,05 white or coloured paper 120 gram 0,05 sheet (only XEROX,09 two-sided 0,06 0,15 Prints and copies Fullcolour XEROX PRINTERS 7556 - 7655 - 7335 A4 A3 Paper type

Franssen, Michael

177

Reliability of chip on glass module fabricated with direct printing method  

Science Conference Proceedings (OSTI)

To investigate the effect of the sintering temperature on the electrical properties of a chip on glass (COG) module, a screen-printed conductive circuit was sintered at various temperatures, viz. 150, 200, 250 and 300^oC for 30min. An anisotropic conductive ... Keywords: Ag nanopaste, Anisotropic conductive film (ACF), Chip on glass (COG), Reliability, Screen-printing, Temperature-humidity test (THT)

Young-Chul Lee, Jong-Woong Kim, Yongil Kim, Seung-Boo Jung

2013-07-01T23:59:59.000Z

178

Accelerated Publication: Ag nanoparticle-based inkjet printed planar transmission lines for RF and microwave applications: Considerations on ink composition, nanoparticle size distribution and sintering time  

Science Conference Proceedings (OSTI)

Sintering of Ag nanoparticle (NP)-based inkjet printed tracks is a crucial process for the next-generation digitally printed electronics. In particular, while the digital printing, as additive technology, is now well settled for what concerns either ... Keywords: Inkjet printing, Microwave planar transmission lines, Real-time measurements, Silver nanoparticles

A. Chiolerio; M. Cotto; P. Pandolfi; P. Martino; V. Camarchia; M. Pirola; G. Ghione

2012-09-01T23:59:59.000Z

179

Printing out Particle Detectors with 3D-Printers, a Potentially Transformational Advance for HEP Instrumentation  

E-Print Network (OSTI)

This white paper suggests posing a "grand challenge" to the HEP instrumentation community, i.e. the aggressive development of additive manufacturing, also known as 3D-printing, for the production of particle detectors in collaboration with industry. This notion is an outcome of discussions within the instrumentation frontier group during the 2013 APS-DPF Snowmass summer study conducted by the U.S. HEP community. Improvements of current industrial 3D-printing capabilities by one to two orders of magnitude in terms of printing resolution, speed, and object size together with developing the ability to print composite materials could enable the production of any desired 3D detector structure directly from a digital model. Current industrial 3D-printing capabilities are briefly reviewed and contrasted with capabilities desired for printing detectors for particle physics, with micro-pattern gaseous detectors used as a first example. A significant impact on industrial technology could be expected if HEP were to part...

Hohlmann, M

2013-01-01T23:59:59.000Z

180

Printing out Particle Detectors with 3D-Printers, a Potentially Transformational Advance for HEP Instrumentation  

E-Print Network (OSTI)

This white paper suggests posing a "grand challenge" to the HEP instrumentation community, i.e. the aggressive development of additive manufacturing, also known as 3D-printing, for the production of particle detectors in collaboration with industry. This notion is an outcome of discussions within the instrumentation frontier group during the 2013 APS-DPF Snowmass summer study conducted by the U.S. HEP community. Improvements of current industrial 3D-printing capabilities by one to two orders of magnitude in terms of printing resolution, speed, and object size together with developing the ability to print composite materials could enable the production of any desired 3D detector structure directly from a digital model. Current industrial 3D-printing capabilities are briefly reviewed and contrasted with capabilities desired for printing detectors for particle physics, with micro-pattern gaseous detectors used as a first example. A significant impact on industrial technology could be expected if HEP were to partner with industry in taking on such a challenge.

M. Hohlmann

2013-09-03T23:59:59.000Z

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


181

Positron Emission Tomography (PET) and Positron Scanning  

Office of Scientific and Technical Information (OSTI)

DOE R&D Accomplishments DOE R&D Accomplishments Search All Database Web Pages for Go The Basics Home About What's New FAQ Contact Us Laureates Nobel Laureates Fermi Laureates Nobel Physicists Nobel Chemists Medicine Nobels Explore Insights SC Stories Snapshots R&D Nuggets Database Search Browse Reports Database Help Finding Aids Site Map A - Z Index Menu Synopsis Blog Archive QR Code RSS Archive Tag Cloud Videos Widget XML Bookmark and Share Positron Emission Tomography (PET) and Positron Scanning Resources with Additional Information Positron Emission Tomography (PET) Scanner Courtesy Lawrence Berkeley National Laboratory 'Positron Emission Tomography ... [is a medical imaging technique that] can track chemical reactions in living tissues and merges chemistry with biological imaging. Its strength has been in studies of the brain where there has been significant progress in investigations of drug addiction, aging, mental illness, and neurogenic disorders. Positron Emission Tomography (PET) had its genesis in hot-atom chemical research supported by the Chemical Sciences Division of the Office of Basic Energy Sciences. Through this research it was learned, over many years, how to prepare short-lived positron emitters such as 18F whose half-life is 110 minutes. In 1975, the molecule [18F]fluorodeoxyglucose was successfully synthesized at Brookhaven National Laboratory (BNL) and set the stage for Positron Emission Tomography of the human brain.'

182

Evaluation of Turbine Blades Using Computed Tomography  

E-Print Network (OSTI)

Turbine blades are high value castings having complex internal geometry. Computed Tomography has been employed on Turbine blades for finding out defects and internal details. The wall thickness, rib thickness and radius of curvature are measured from the CT slices. The discontinuities including blockages of cooling passages in the cast material can be detected. 3D visualization of the turbine blade provides in extracting its internal features including inaccessible areas nondestructively, which is not possible through conventional NDE methods. The salient features for evaluation of turbine blades using Tomography are brought out.

C. Muralidhar; S. N. Lukose; M. P. Subramanian

2006-01-01T23:59:59.000Z

183

Positron Computed Tomography: Current State, Clinical Results and Future Trends  

DOE R&D Accomplishments (OSTI)

An overview is presented of positron computed tomography: its advantages over single photon emission tomography, its use in metabolic studies of the heart and chemical investigation of the brain, and future trends. (ACR)

Schelbert, H. R.; Phelps, M. E.; Kuhl, D. E.

1980-09-00T23:59:59.000Z

184

Parallel implementation of stochastic inversion of seismic tomography data  

Science Conference Proceedings (OSTI)

In this paper parallel implementation of stochastic inversion of seismic tomography data was presented. Classical approach to travel time tomography assumes straight line of seismic rays between sources and receives points and isotropy of geological ... Keywords: inverse problem, master-slave paradigm, seismic anisotropy, seismic tomography

Maciej Dwornik; Anna Pi?ta

2011-09-01T23:59:59.000Z

185

Wireless Tomography, Part I: A Novel Approach to Remote Sensing  

E-Print Network (OSTI)

Wireless Tomography, Part I: A Novel Approach to Remote Sensing R. C. Qiu, M. C. Wicks, L. Li, Z. Browning.12@us.af.mil Abstract--Wireless tomography, a novel approach to remote sensing, is proposed--radio frequency tomography, remote sensing, cognitive radar, cognitive radio. I. INTRODUCTION The ever increasing

Qiu, Robert Caiming

186

Advanced Instrumentation for Positron Emission Tomography [PET  

DOE R&D Accomplishments (OSTI)

This paper summarizes the physical processes and medical science goals that underlay modern instrumentation design for Positron Emission Tomography. The paper discusses design factors such as detector material, crystalphototube coupling, shielding geometry, sampling motion, electronics design, time-of-flight, and the interrelationships with quantitative accuracy, spatial resolution, temporal resolution, maximum data rates, and cost.

Derenzo, S. E.; Budinger, T. F.

1985-04-00T23:59:59.000Z

187

Three-dimensional fluorescence lifetime tomography  

Science Conference Proceedings (OSTI)

Near-infrared fluorescence tomography using molecularly targeted lifetime-sensitive, fluorescent contrast agents have applications for early-stage cancer diagnostics. Yet, although the measurement of fluorescent lifetime imaging microscopy (FLIM) is extensively used in microscopy and spectroscopy applications, demonstration of fluorescence lifetime tomography for medical imaging is limited to two-dimensional studies. Herein, the feasibility of three-dimensional fluorescence-lifetime tomography on clinically relevant phantom volumes is established, using (i) a gain-modulated intensified charge coupled device (CCD) and modulated laser diode imaging system, (ii) two fluorescent contrast agents, e.g., Indocyanine green and 3-3'-Diethylthiatricarbocyanine iodide differing in their fluorescence lifetime by 0.62 ns, and (iii) a two stage approximate extended Kalman filter reconstruction algorithm. Fluorescence measurements of phase and amplitude were acquired on the phantom surface under different target to background fluorescence absorption (70:1, 100:1) and fluorescence lifetime (1:1, 2.1:1) contrasts at target depths of 1.4-2 cm. The Bayesian tomography algorithm was employed to obtain three-dimensional images of lifetime and absorption owing to the fluorophores.

Godavarty, Anuradha; Sevick-Muraca, Eva M.; Eppstein, Margaret J. [327 Votey Building, Department of Computer Science, University of Vermont, Burlington, Vermont 05405 (United States); 1011 Richardson Building, Photon Migration Laboratories, Texas A and M University, College Station, Texas 77843 (United States); 327 Votey Building, Department of Computer Science, University of Vermont, Burlington, Vermont 05405 (United States)

2005-04-01T23:59:59.000Z

188

Industrial tomography applied to reactor safety  

SciTech Connect

Work has begun which explores the use of Computed Axial Tomography (CAT), boundary detection, and internal surface reconstruction techniques in industrial nondestructive testing applications. This initial work is intended to inform the reader of the existence and interrelated nature of these techniques through the use of a realistic simulation of an industrial inspection problem.

Kruger, R.P.

1977-01-01T23:59:59.000Z

189

Disability equality and discrimination in higher education: staff and student perceptions of the 'reasonable' adjustments made for print disabled students.  

E-Print Network (OSTI)

??The aim of this research was to explore staff and student experiences of the barriers print disabled students face and the adjustments made to overcome (more)

Rowlett, Emma Jane

2011-01-01T23:59:59.000Z

190

To save campaign costs, use the e-Giving paperless or print  

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

save campaign costs, use the e-Giving paperless or print save campaign costs, use the e-Giving paperless or print and submit form options at www.cfcnca.org. You can donate through payroll deduction to spread your giving over the year or choose credit/debit card, electronic check, cash or check. If you complete your Pledge Form online, you also must write your Social Security Number on the copy that is submitted to the payroll office for payroll deduction. Check with your Keyworker if your payroll office accepts an alternate identification number. If using the paper Pledge Form, please follow these steps: ➤ Print all information FIRMLY using a ballpoint pen because you are making three copies. Refer to the charity code numbers and descriptions in our online charity search or in this catalog. All charities have a five-digit

191

E-print Network home page -- Energy, science, and technology for the  

Office of Scientific and Technical Information (OSTI)

Energy, science, and technology for the research community! Energy, science, and technology for the research community! Enter Search Terms Search Advanced Search The E-print Network is . . . . . . a vast, integrated network of electronic scientific and technical information created by scientists and research engineers active in their respective fields, all full-text searchable. E-print Network is intended for use by other scientists, engineers, and students at advanced levels. . . . a gateway to over 35,300 websites and databases worldwide, containing over 5.5 million e-prints in basic and applied sciences, primarily in physics but also including subject areas such as chemistry, biology and life sciences, materials science, nuclear sciences and engineering, energy research, computer and information technologies, and other disciplines of

192

Collection Descriptions for the E-print Network -- Energy, science, and  

Office of Scientific and Technical Information (OSTI)

Collection Descriptions Collection Descriptions E-prints on Subject Web Sites Coverage: provided by each unique Web site crawled (over 2.5 million documents) Description: The E-prints on Subject Web Sites collections contain electronic scientific and technical information created by scientists and research engineers active in their respective fields. These collections are intended for use by other scientists, engineers, and students at advanced levels in basic and applied sciences. Subject categories are Biology and Medicine; Biotechnology; Chemistry; Computer Technologies and Information Sciences; Energy Storage, Conversion and Utilization; Engineering; Environmental Management and Restoration Technologies; Environmental Sciences and Ecology; Fission and Nuclear Technologies; Fossil Fuels;

193

Ground-based Microwave Cloud Tomography  

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

Microwave Cloud Tomography Microwave Cloud Tomography Experiment, SGP, May 15-June 15, 2009 Lead Scientist Dong Huang, BNL Co-Investigators Al Gasiewski, UC Boulder Maria Cadeddu, ANL Warren Wiscombe, BNL Radiation Processes Working Group March 30, 2009 multiple radiometers All good cloud radiation modelers should close their airplane window shades so as not to be corrupted by the spectacle of real 3D clouds. - Roger Davies In case you forget to do this, you see 3/30/2009 ARM RPWG 2 Effects of cloud structure on radiation 3/30/2009 ARM RPWG 3 Typical climate model - Cloud fraction & mean water content - Horizontally uniform clouds, no side radiation - Assumption on overlap Courtesy of Bernhard Mayer Cloud structure important to radiation - Cumulus (Benner & Evans 2001, Pincus et al. 2005), deep convection (DiGiuseppe &

194

Photon-number tomography and fidelity  

E-Print Network (OSTI)

The scheme of photon-number tomography is discussed in the framework of star-product quantization. The connection of dual quantization scheme and observables is reviewed. The quantizer and dequantizer operators and kernels of star product of tomograms in photon-number tomography scheme and its dual one are presented in explicit form. The fidelity and state purity are discussed in photon{number tomographic scheme, and the expressions for fidelity and purity are obtained in the form of integral of the product of two photon-number tomograms with integral kernel which is presented in explicit form. The properties of quantumness are discussed in terms of inequalities on state photon{number tomograms.

O. V. Man'ko

2012-12-23T23:59:59.000Z

195

A wavelet phase filter for emission tomography  

Science Conference Proceedings (OSTI)

The presence of a high level of noise is a characteristic in some tomographic imaging techniques such as positron emission tomography (PET). Wavelet methods can smooth out noise while preserving significant features of images. Mallat et al. proposed a wavelet based denoising scheme exploiting wavelet modulus maxima, but the scheme is sensitive to noise. In this study, the authors explore the properties of wavelet phase, with a focus on reconstruction of emission tomography images. Specifically, they show that the wavelet phase of regular Poisson noise under a Haar-type wavelet transform converges in distribution to a random variable uniformly distributed on [0, 2{pi}). They then propose three wavelet-phase-based denoising schemes which exploit this property: edge tracking, local phase variance thresholding, and scale phase variation thresholding. Some numerical results are also presented. The numerical experiments indicate that wavelet phase techniques show promise for wavelet based denoising methods.

Olsen, E.T.; Lin, B. [Illinois Inst. of Tech., Chicago, IL (United States). Dept. of Mathematics

1995-07-01T23:59:59.000Z

196

Improving scintillation crystals using muon tomography  

SciTech Connect

The cosmic ray muon scanning array provides information on NaI(T1) crystals using some 65,536 trajectories, each measuring the NaI(T1) response to high energy muons. With this information, it is possible to use established computer-aided-tomography techniques to deconvolute these integrated responses and produce a detailed picture of the detector's interior.

Dowell, D.H.; Fineman, B.J.; Sandorfi, A.M.

1987-01-01T23:59:59.000Z

197

Field implementation of geophysical diffraction tomography  

SciTech Connect

Geophysical diffraction tomography is a new technique that shows promise as a tool for quantitative subsurface (below-ground) imaging. The approach being used is based upon the filtered backpropagation algorithm, which is a mathematical extension of the reconstruction software used in conventional X-ray CAT scanners. The difference between this method and existing methods is that the new algorithm rigorously accounts for diffraction effects through an exact inversion of the wave equation. This refinement is necessary in that it admits the use of acoustic and long-wavelength electromagnetic waves, allowing tomography to be taken from the laboratory to the field. ORNL's effort in geophysical diffraction tomography involves reducing the filtered backpropagation algorithm to practice. This requires the design and construction of field instrumentation as well as the development of an improved algorithm. The original algorithm requires the imaged region to be illuminated by plane waves. This requirement simplifies the algorithm but complicates its field implementation in that plane waves are difficult to generate. Consequently, ORNL has been working to generalize the filtered backpropagation algorithm to allow a broader range of incoming wave fields which can more easily be realized in the field. The instrumentation aspects involve the selection of appropriate sonic sources and receivers along with the development of a state-of-art, portable, computer-controlled, multichannel data acquisition system. 5 references, 6 figures.

Witten, A.J.; Stevens, S.S.

1984-01-01T23:59:59.000Z

198

Assessing the operational life of flexible printed boards intended for continuous flexing applications : a case study.  

Science Conference Proceedings (OSTI)

Through the vehicle of a case study, this paper describes in detail how the guidance found in the suite of IPC (Association Connecting Electronics Industries) publications can be applied to develop a high level of design assurance that flexible printed boards intended for continuous flexing applications will satisfy specified lifetime requirements.

Beck, David Franklin

2011-01-01T23:59:59.000Z

199

A hybrid approach to outlier detection in the offset lithographic printing process  

Science Conference Proceedings (OSTI)

Artificial neural networks are used to model the offset printing process aiming to develop tools for on-line ink feed control. Inherent in the modelling data are outliers owing to sensor faults, measurement errors and impurity of materials used. It is ... Keywords: Fuzzy expert, Leverages, Neural network, Outlier detection

C. Englund; A. Verikas

2005-09-01T23:59:59.000Z

200

Segmentation of historical machine-printed documents using Adaptive Run Length Smoothing and skeleton segmentation paths  

E-Print Network (OSTI)

of the valuable historical collections. In order to achieve accu- rate recognition results, a robust and efficientSegmentation of historical machine-printed documents using Adaptive Run Length Smoothing Stamatopoulos b , Nikos Papamarkos a a Department of Electrical and Computer Engineering, Democritus University

Gatos, Basilios

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


201

Mar 24th 2011 | from the print edition 0 40Like Battery technology  

E-Print Network (OSTI)

Mar 24th 2011 | from the print edition 0 40Like Battery technology Highly charged A powerful experimental battery that can be recharged completely in minutes ENGINEERS have long dreamed of shortening the time it takes to recharge batteries. Currently, that can be hours. For applications like motor vehicles

Braun, Paul

202

Graphene Transistors Fabricated via Transfer-Printing In Device Active-Areas  

E-Print Network (OSTI)

growth.5 However, to use graphene as the material for integrated circuits we need high-quality graphene. wafers. This paper reports a demonstration of a different approach to achieve high-quality graphene- printing (DCT), does not intend to put high-quality graphene everywhere on a large substrate but rather

203

Anaerobic Baffled Reactor (ABR) for Alkali-minimization Dyeing-printing Wastewater Biodegradation  

Science Conference Proceedings (OSTI)

The performance of the laboratory scale anaerobic baffled reactor (ABR) was investigated by the use of granular sludge to treat alkali-minimization and dyeing-printing wastewater (ADW-water). The experiment showed that the start-up of reactor was completed ... Keywords: ABR, ADW-water, Granular sludge, UV254, VFA

Qijun Zhong; Bo Yang

2012-05-01T23:59:59.000Z

204

J . Fluid Mech. (1989),vol. 207, p p . 133-152 Printed in Great Britain  

E-Print Network (OSTI)

with a fixed randomly generated velocity field. At infinite resolution, the modified dynamics with energyJ . Fluid Mech. (1989),vol. 207, p p . 133-152 Printed in Great Britain 133 Extremal energy) Certain modifications of the Euler equations of fluid motion lead to systems in which the energy decays

Vallis, Geoff

205

J . Fluid Mech. (1980),vol. 100, part 4, pp. 705-737 Printed in &eat Britain  

E-Print Network (OSTI)

J . Fluid Mech. (1980),vol. 100, part 4, pp. 705-737 Printed in &eat Britain 706 Vortex dynamics, and if they equilibrate between mergings, conservation of energy and angular momentum #12;Vortex dynamics of the turbulent, with vortices of one generation merging to form the larger vortices of the next generation. The reader

Siggia, Eric

206

A simple and versatile micro contact printing method for generating carbon nanotubes patterns on various substrates  

Science Conference Proceedings (OSTI)

We present an optimized process for generating at low cost, patterns of carbon nanotubes (CNTs) on a large variety of substrates through a simple micro contact printing method. This method meets the requirements for the integration of CNTs into microdevices, ... Keywords: Carbon nanotubes, Flexible electronics, Micro-patterning, Soft-lithography, Spray-coating

A. BDuer; F. Seichepine; E. Flahaut; C. Vieu

2012-09-01T23:59:59.000Z

207

Instructions for setting up a "Print to FILE" printer Windows 2000/ME/XP  

E-Print Network (OSTI)

Instructions for setting up a "Print to FILE" printer Windows 2000/ME/XP Select "Start -> Printers "Next" On the "Install Printer Software screen", select "Generic" in the left window (Manufacturer) and "Generic / Text Only" in the right window (Printers), then click "Next". On the "Name Your Printer" screen

DeSante, David F.

208

Biomass and &nergy Vol. 3, No. 5, pp. 301-307, 1992 Printed in Great Britain  

E-Print Network (OSTI)

Biomass and &nergy Vol. 3, No. 5, pp. 301-307, 1992 Printed in Great Britain 0961-9534/92 $5.00 + 0 saccharification and fermentation (SSF) process is a favored option for conversion of the lignocellulosic biomass biomass, ethanol, woody crops, herbaceous crops, agricultural residues. 1. INTRODUCIION Although ethanol

California at Riverside, University of

209

A Comparative Study between Decision Fusion and Data Fusion in Markovian Printed Character Recognition  

Science Conference Proceedings (OSTI)

A comparison is made between several Hidden Markov Models in the context of printed character recognition. Two HMMs are first compared, one dealing with columns of a character image, the other dealing with lines. These 2 HMMs are then associated in a ...

Khalid Hallouli; Laurence Likforman-Sulem; Marc Sigelle

2002-08-01T23:59:59.000Z

210

Emerging Technologies in the Built Environment: Geographic Information Science (GIS), 3D Printing, and Additive Manufacturing  

SciTech Connect

Abstract 1: Geographic information systems emerged as a computer application in the late 1960s, led in part by projects at ORNL. The concept of a GIS has shifted through time in response to new applications and new technologies, and is now part of a much larger world of geospatial technology. This presentation discusses the relationship of GIS and estimating hourly and seasonal energy consumption profiles in the building sector at spatial scales down to the individual parcel. The method combines annual building energy simulations for city-specific prototypical buildings and commonly available geospatial data in a GIS framework. Abstract 2: This presentation focuses on 3D printing technologies and how they have rapidly evolved over the past couple of years. At a basic level, 3D printing produces physical models quickly and easily from 3D CAD, BIM (Building Information Models), and other digital data. Many AEC firms have adopted 3D printing as part of commercial building design development and project delivery. This presentation includes an overview of 3D printing, discusses its current use in building design, and talks about its future in relation to the HVAC industry. Abstract 3: This presentation discusses additive manufacturing and how it is revolutionizing the design of commercial and residential facilities. Additive manufacturing utilizes a broad range of direct manufacturing technologies, including electron beam melting, ultrasonic, extrusion, and laser metal deposition for rapid prototyping. While there is some overlap with the 3D printing talk, this presentation focuses on the materials aspect of additive manufacturing and also some of the more advanced technologies involved with rapid prototyping. These technologies include design of carbon fiber composites, lightweight metals processing, transient field processing, and more.

New, Joshua Ryan [ORNL

2014-01-01T23:59:59.000Z

211

19th European Photovoltaic Solar Energy Conference Pre-Print 4AV.1.45 QUANTUM EFFICIENCY OF CdTe SOLAR CELLS IN FORWARD BIAS  

E-Print Network (OSTI)

19th European Photovoltaic Solar Energy Conference Pre-Print 4AV.1.45 QUANTUM EFFICIENCY OF Cd;19th European Photovoltaic Solar Energy Conference Pre-Print 4AV.1.45 Figure 2 shows the numerical as #12;19th European Photovoltaic Solar Energy Conference Pre-Print 4AV.1.45 CE V( )= J V,100%( )- J V

Sites, James R.

212

Recent Advances in Atom Probe Tomography for Microstructural ...  

Science Conference Proceedings (OSTI)

In-situ Ultra Fast Micro-tomography for Material Characterization In situ Characterization of Surfaces and Buried Interfaces Using Total Reflection Inelastic...

213

The Application of Atom Probe Tomography to Oxide-Dispersion ...  

Science Conference Proceedings (OSTI)

Contributions of Atom Probe Tomography to the Understanding of Steels ... Investigation of the Microstructure-Property-Processing Relationships in a Series of...

214

Time-dependent seismic tomography and its application to the...  

Open Energy Info (EERE)

changes in Earth structure are commonly determined using local earthquake tomography computer programs that invert multiple seismic-wave arrival time data sets separately and...

215

Imaging and sensing based on muon tomography - Energy Innovation ...  

Subtraction techniques are described to enhance the processing of the muon tomography data. Skip to Content. ... Hydropower, Wave and Tidal; Industrial Technologies ...

216

Minimally invasive diagnostic imaging using high resolution Optical Coherence Tomography  

E-Print Network (OSTI)

Advances in medical imaging have given researchers unprecedented capabilities to visualize, characterize and understand biological systems. Optical Coherence Tomography (OCT) is a high speed, high resolution imaging technique ...

Herz, Paul Richard, 1972-

2004-01-01T23:59:59.000Z

217

THE THERMAL SUNYAEV-ZEL'DOVICH TOMOGRAPHY  

Science Conference Proceedings (OSTI)

The thermal Sunyaev-Zel'dovich (tSZ) effect directly measures the thermal pressure of free electrons integrated along the line of sight and thus contains valuable information on the thermal history of the universe. However, the redshift information is entangled in the projection along the line of sight. This projection effect severely degrades the power of the tSZ effect to reconstruct the thermal history. We investigate the tSZ tomography technique to recover this otherwise lost redshift information by cross-correlating the tSZ effect with galaxies of known redshifts, or alternatively with matter distribution reconstructed from weak-lensing tomography. We investigate in detail the three-dimensional distribution of the gas thermal pressure and its relation with the matter distribution, through our adiabatic hydrodynamic simulation and the one with additional gastrophysics including radiative cooling, star formation, and supernova feedback. (1) We find a strong correlation between the gas pressure and matter distribution, with a typical cross-correlation coefficient r {approx}> 0.7 at k {approx}tight correlation will enable robust cross-correlation measurement between SZ surveys such as Planck, ACT, and SPT and lensing surveys such as DES and LSST, at {approx}>20{sigma}-100{sigma} level. (2) We propose a tomography technique to convert the measured cross-correlation into the contribution from gas in each redshift bin to the tSZ power spectrum. Uncertainties in gastrophysics may affect the reconstruction at {approx}2% level, due to the {approx}1% impact of gastrophysics on r found in our simulations. However, we find that the same gastrophysics affects the tSZ power spectrum at {approx}40% level, so it is robust to infer the gastrophysics from the reconstructed redshift-resolved contribution.

Shao Jiawei; Zhang Pengjie; Lin Weipeng; Jing Yipeng, E-mail: jwshao@shao.ac.cn [Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Nandan Road 80, Shanghai 200030 (China)

2011-04-01T23:59:59.000Z

218

Error matrix in quantum process tomography  

E-Print Network (OSTI)

We discuss characterization of experimental quantum gates by the error matrix, which is similar to the standard process matrix $\\chi$ in the Pauli basis, except the desired unitary operation is factored out, by formally placing it either before or after the error process. The error matrix has only one large element, which is equal to the process fidelity, while other elements are small and indicate imperfections. The imaginary parts of the elements along the left column and/or top row directly indicate the unitary imperfection and can be used to find the needed correction. We discuss a relatively simple way to calculate the error matrix for a composition of quantum gates. Similarly, it is rather straightforward to find the first-order contribution to the error matrix due to the Lindblad-form decoherence. We also discuss a way to identify and subtract the tomography procedure errors due to imperfect state preparation and measurement. In appendices we consider several simple examples of the process tomography and also discuss an intuitive physical interpretation of the Lindblad-form decoherence.

Alexander N. Korotkov

2013-09-25T23:59:59.000Z

219

Dynamic Inversion for Hydrological Process Monitoring with Electrical Resistance Tomography Under Model Uncertainty  

E-Print Network (OSTI)

water content using electrical resistivity tomography, WaterJ. Nitao (1992), Electrical resistivity tomography of vadoseinverse model for electrical resistivity surveys and its

Lehikoinen, A.

2010-01-01T23:59:59.000Z

220

E-print Network Alerts Help -- Energy, science, and technology for the  

Office of Scientific and Technical Information (OSTI)

Alerts Help Alerts Help Alerts will make your recurring searches even easier by automating your search and sending you the results on a regular basis. To receive alerts on your topic(s) of interest, simply create an Alerts account, specify your alert parameters and check your email. For additional information, please choose from one of the below help topics. Alerts Help Topics: Creating an Alerts account Alerts Homepage Create an alert Creating an alert from your search Receiving alerts Viewing alerts Selecting printing, emailing, and exporting alerts Storing alerts Modifying alerts Deleting an alert Alerts Search Tips E-print Network Alerts Fast Facts You can easily create an alert right from the results page. Alerts run automatically, based on the schedule you choose. New relevantly ranked results are automatically sent to you through

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


221

E-print Network Architecture -- Energy, science, and technology for the  

Office of Scientific and Technical Information (OSTI)

Architecture: What is under the Hood Architecture: What is under the Hood E-print Network allows the information patron to search multiple data sources with a single query from the user interface. While the user gets a seamless, Google-like search and retrieval experience, sophisticated Web technology is used behind the scenes. Such sophistication is necessitated by the fact that different researchers and research organizations use different mechanisms to publish e-prints. The publication mechanisms fall into one of two general categories. First, "papers" and articles can be published in databases or portals. Typically, such databases and portals have their own search engine, and they are often not readily crawled and indexed. Alternatively, "papers" and articles can be published as simple

222

About the E-print Network -- Energy, science, and technology for the  

Office of Scientific and Technical Information (OSTI)

About About General Information E-prints are scholarly and professional works electronically produced and shared by researchers with the intent of communicating research findings to colleagues. They may include preprints, reprints, technical reports, conference publications or other means of electronic communication. Preprints, those selectively shared pre-published documents or articles going through the publication process, have long been recognized and utilized by peer groups throughout the scientific community. Recent technological advances, however, have incorporated preprints with other forms of peer communications to establish an information genre in its own right. Therefore, the more inclusive term e-prints is more appropriate to use currently in describing this rich and valuable source of scientific and

223

Install the E-print Network toolbar -- Energy, science, and technology for  

Office of Scientific and Technical Information (OSTI)

Browser Toolbar The E-print Network offers a browser toolbar for easy access to e-print searches and discipline pages. EPN browser toolbar Two installation options are available for the EPN browser toolbar: Internet Explorer - Download and install the toolbar using the Softomate ActiveX Web installer Please select "Install ActiveX Control" when prompted by your browser. Install toolbar for Internet Explorer Can't see the toolbar after installing? Note: Browser security settings at some organizations may prevent installation or use of the toolbar in Internet Explorer. Try installing the toolbar in the FireFox browser, using the button below. Minimum System Requirements: Windows XP/Vista Internet Explorer 6 or Firefox 2 FireFox - Install toolbar for FireFox

224

Browse by Discipline -- Subject Pathways for the E-print Network -- Energy,  

Office of Scientific and Technical Information (OSTI)

Browse by Discipline These pages contain links to thousands of servers, sites, and documents contributed by individual authors that contain e-print information in discipline areas of interest to the Department of Energy's research activities. These resources are organized into discipline-specific categories as indicated below. To view these resources and sites, simply select a discipline, browse the entries listed in alphabetical order, and click on any entry to leave the discipline you selected and enter a specific website. Use the "Back" button to return to the E-print Discipline you exited from. Biology and Medicine Biotechnology Computer Technologies and Information Sciences Chemistry Energy Storage, Conversion and Utilization Engineering Environmental Management and Restoration Technologies

225

J . Fluid Mech. (1978),vol. 86, part 3, pp. 567-592 Printed in Oreat Britain  

E-Print Network (OSTI)

-dimensional turbulence 575 k (cm-') FIGURE5. Energy spectra generated by the linear forcing defined in (2.3)with R = 0.4s J . Fluid Mech. 41,453. FRISCH,U., SULEM,P. L. & NELKIN,M. 1978 A simple dynamical modelJ . Fluid Mech. (1978),vol. 86, part 3, pp. 567-592 Printed in Oreat Britain 567 Intermittency

Siggia, Eric

226

E-print Network Web Log News: Research Communications for Scientists and  

Office of Scientific and Technical Information (OSTI)

Archive Archive Search Archive August 11, 2006 We’ve had a number of inquiries about how to best search our E-prints on Web-sites feature for individual authors. Here’s what you do. First be sure that the E-prints on Web sites box is checked then go down to the Creator/Author search box and enter the researcher’s last name followed by the first name but use no punctuation between the names. For instance if you were looking for John Brown you would enter in the Creator/Author Box Brown John Then start the search by clicking black search button near the bottom of the page. Please note that the author searching in the E-prints on Web-sites works only for authors who have provided eprints on their web sites. This means that searching for any other author will not return useful results. Also you should find that when multiple authors provide the same eprint, searching for any of the providing authors will retrieve the paper.

227

Review and Understanding of Screen-Printed Contacts and Selective-Emitter Formation: Preprint  

DOE Green Energy (OSTI)

A comparison of the loss mechanisms in screen-printed solar cells relative to buried contact cells and cells with photolithography-defined contacts is presented in this paper. Model calculations show that emitter recombination accounts for about 0.5% absolute efficiency loss in conventional screen-printed cells with low-sheet-resistance emitters. Ohmic contact to high-sheet-resistance emitters by screen-printing has been investigated to regain this efficiency loss. Our work shows that good quality ohmic contacts to high sheet-resistance emitters can be achieved if the glass frit chemistry and Ag particle size are carefully tailored. The melting characteristics of the glass frit determine the firing scheme suitable for low contact resistance and high fill factors. In addition, small to regular Ag particles were found to help achieve a higher open-circuit voltage and maintain a low contact resistance. This work has resulted in cells with high fill factors (0.782) on high sheet-resistance emitters and efficiencies of 17.4% on planar float zone Si substrates, without the need for a selective emitter.

Hilali, M. M.; Rohatgi, A.; To, B.

2004-08-01T23:59:59.000Z

228

3D Printing: High-impact Emerging Technology - What You Need to Know Definitions, Adoptions, Impact, Benefits, Maturity, Vendors  

Science Conference Proceedings (OSTI)

3D printing is a form of additive manufacturing technology where a three dimensional object is created by laying down successive layers of material. 3D printers are generally faster, more affordable and easier to use than other additive manufacturing ...

Kevin Roebuck

2011-05-01T23:59:59.000Z

229

Design and development of an automated three axis machine that prints images on top of the foam of certain beverages  

E-Print Network (OSTI)

The goal of this research was to design and develop a working alpha prototype of the flagship product for a local startup called Onlatte, Inc. OnLatte specializes in automated printing of images on top of the foam of ...

Richardson, Jeremy S. H

2009-01-01T23:59:59.000Z

230

Achieving Six Sigma printed circuit board yields by improving incoming component quality and using a PCBA prioritization algorithm  

E-Print Network (OSTI)

Printed circuit board assemblies (PCBAs) are the backbone of the electronics industry. PCBA technologies are keeping pace with Moore's Law and will soon enable the convergence of video, voice, data, and mobility onto a ...

Davis, Daniel Jacob

2008-01-01T23:59:59.000Z

231

Ultra-high resolution computed tomography imaging  

DOE Patents (OSTI)

A method for ultra-high resolution computed tomography imaging, comprising the steps of: focusing a high energy particle beam, for example x-rays or gamma-rays, onto a target object; acquiring a 2-dimensional projection data set representative of the target object; generating a corrected projection data set by applying a deconvolution algorithm, having an experimentally determined a transfer function, to the 2-dimensional data set; storing the corrected projection data set; incrementally rotating the target object through an angle of approximately 180.degree., and after each the incremental rotation, repeating the radiating, acquiring, generating and storing steps; and, after the rotating step, applying a cone-beam algorithm, for example a modified tomographic reconstruction algorithm, to the corrected projection data sets to generate a 3-dimensional image. The size of the spot focus of the beam is reduced to not greater than approximately 1 micron, and even to not greater than approximately 0.5 microns.

Paulus, Michael J. (Knoxville, TN); Sari-Sarraf, Hamed (Knoxville, TN); Tobin, Jr., Kenneth William (Harriman, TN); Gleason, Shaun S. (Knoxville, TN); Thomas, Jr., Clarence E. (Knoxville, TN)

2002-01-01T23:59:59.000Z

232

Dynamic tomography with a priori information  

SciTech Connect

We present ''dynamic tomography'' algorithms that allow for the high-resolution, time-resolved imaging of dynamic (i.e., continuously time evolving) complex systems at existing x-ray micro-CT facilities. The behavior of complex systems is constrained by the underlying physics. By exploiting a priori knowledge of the geometry of the physical process being studied to allow the use of sophisticated iterative reconstruction techniques that incorporate constraints, we improve on current frame rates by at least an order of magnitude. This allows time-resolved imaging of previously intractable processes, such as two-phase fluid flow. We present reconstructions from experimental data collected at the Australian National University x-ray micro-CT facility.

Myers, Glenn R.; Kingston, Andrew M.; Varslot, Trond K.; Turner, Michael L.; Sheppard, Adrian P.

2011-07-10T23:59:59.000Z

233

MicroComputed Tomography: Methodology and Applications  

Science Conference Proceedings (OSTI)

Due to the availability of commercial laboratory systems and the emergence of user facilities at synchrotron radiation sources, studies of microcomputed tomography or microCT have increased exponentially. MicroComputed Technology provides a complete introduction to the technology, describing how to use it effectively and understand its results. The first part of the book focuses on methodology, covering experimental methods, data analysis, and visualization approaches. The second part addresses various microCT applications, including porous solids, microstructural evolution, soft tissue studies, multimode studies, and indirect analyses. The author presents a sufficient amount of fundamental material so that those new to the field can develop a relative understanding of how to design their own microCT studies. One of the first full-length references dedicated to microCT, this book provides an accessible introduction to field, supplemented with application examples and color images.

(NWU)

2009-04-02T23:59:59.000Z

234

Positron emission tomography of the heart  

SciTech Connect

Positron emission computed tomography (PCT) represents an important new tool for the noninvasive evaluation and, more importantly, quantification of myocardial performance. Most currently available techniques permit assessment of only one aspect of cardiac function, i.e., myocardial perfusion by gamma scintillation camera imaging with Thallium-201 or left ventricular function by echocardiography or radionuclide angiocardiography. With PCT it may become possible to study all three major segments of myocardial performance, i.e., regional blood flow, mechanical function and, most importantly, myocardial metabolism. Each of these segments can either be evaluated separately or in combination. This report briefly describes the principles and technological advantages of the imaging device, reviews currently available radioactive tracers and how they can be employed for the assessment of flow, function and metabolism; and, lastly, discusses possible applications of PCT for the study of cardiac physiology or its potential role in the diagnosis of cardiac disease.

Schelbert, H.R.; Phelps, M.E.; Kuhl, D.E.

1979-01-01T23:59:59.000Z

235

Passive Network Tomography Using Bayesian Inference  

E-Print Network (OSTI)

this paper, we investigate the problem of identifying lossy links in the interior of the Internet by passively observing the end-to-end performance of existing traffic between a server and its clients. This is in contrast to the previous work on network tomography (e.g., [1]) that has been based on active probing. The key advantage of a passive approach is that it does not introduce wasteful traffic which might perturb the object of inference, i.e., the link loss rates. Moreover, our techniques depend only on knowing the number of lost and successful packets sent to each client rather than the exact loss sequence required by previous techniques such as [1]. While accuracy of link loss rate inference may consequently suffer, our techniques can still pinpoint the trouble spots in the network (e.g., highly lossy links)

Venkata N. Padmanabhan; Lili Qiu; Helen J. Wang

2002-01-01T23:59:59.000Z

236

Feasibility study for mega-electron-volt electron beam tomography  

SciTech Connect

Electron beam tomography is a promising imaging modality for the study of fast technical processes. But for many technical objects of interest x rays of several hundreds of keV energy are required to achieve sufficient material penetration. In this article we report on a feasibility study for fast electron beam computed tomography with a 1 MeV electron beam. The experimental setup comprises an electrostatic accelerator with beam optics, transmission target, and a single x-ray detector. We employed an inverse fan-beam tomography approach with radiographic projections being generated from the linearly moving x-ray source. Angular projections were obtained by rotating the object.

Hampel, U. [Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden (Germany); AREVA Endowed Chair of Imaging Techniques in Energy and Process Engineering, Technische Universitaet Dresden, 01062 Dresden (Germany); Baertling, Y.; Hoppe, D. [Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden (Germany); Kuksanov, N.; Fadeev, S.; Salimov, R. [Budker Institute of Nuclear Physics of Siberian Branch of Russian Academy of Science, Lavrentiev av. 11, Novosibirsk 630090 (Russian Federation)

2012-09-15T23:59:59.000Z

237

Print - TMS  

Science Conference Proceedings (OSTI)

Presented in conjunction with the Low Cost Titanium symposium ... medical implants and surgical instruments, oil and gas exploration, chemical processing, ...

238

Print - TMS  

Science Conference Proceedings (OSTI)

Presenters, Michael Moats, Bill Davenport, Maurice Solar, Tim Robinson, Bruce ... the course will examine the fundamentals and current trends of the processing ...

239

Body Wave Tomography For Regional Scale Assessment Of Geothermal Indicators  

Open Energy Info (EERE)

Body Wave Tomography For Regional Scale Assessment Of Geothermal Indicators Body Wave Tomography For Regional Scale Assessment Of Geothermal Indicators In The Western Great Basin Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Body Wave Tomography For Regional Scale Assessment Of Geothermal Indicators In The Western Great Basin Details Activities (8) Areas (4) Regions (0) Abstract: Body and surface wave tomography are two of the primary methods for estimation of regional scale seismic velocity variations. Seismic velocity is affected by temperature and rock composition in complex ways, but when combined with geologic and structural maps, relative temperature can in some cases be estimated. We present preliminary tomographic models for compressional and shear-wave velocity using local and regional earthquakes recorded by Earthscope Transportable Array stations, network

240

Electrical capacitance volume tomography (ECVT) applied to bubbling fluid beds  

SciTech Connect

These presentation visuals illustrate the apparatus and method for applying Electrical Capacitance Volume Tomography (ECVT) to bubbling fluid beds to their solid fraction and bubble properties. Results are compared to estimated values.

Weber, J., Mei, J.

2012-01-01T23:59:59.000Z

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


241

Full-3D Waveform Tomography for Southern California | Argonne...  

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

Submitted by mkaczmar on October 3, 2012 - 09:19 Authors: Lee, E., Chenm P., Jordan, T.H., Maechling, P.J., Denolle, M., Beroza, G.C. Our full-3D tomography (F3DT) uses...

242

Cerenkov luminescence tomography for in vivo radiopharmaceutical imaging  

Science Conference Proceedings (OSTI)

Cerenkov luminescence imaging (CLI) is a cost-effective molecular imaging tool for biomedical applications of radiotracers. The introduction of Cerenkov luminescence tomography (CLT) relative to planar CLI can be compared to the development of X-ray ...

Jianghong Zhong; Chenghu Qin; Xin Yang; Shuping Zhu; Xing Zhang; Jie Tian

2011-01-01T23:59:59.000Z

243

Satellite Remote Sensing by the Technique of Computed Tomography  

Science Conference Proceedings (OSTI)

Computed tomography is a medical diagnostic technique in which x-ray transmission measurements at numerous angles through the human body are processed by computer to produce cross-sectional pictures of the body. A modification of this technique, ...

Henry E. Fleming

1982-10-01T23:59:59.000Z

244

A Simulation Study of Satellite Emission Computed Tomography  

Science Conference Proceedings (OSTI)

Satellite emission computed tomography retrieves the temperature of the atmosphere from radiances observed at multiple viewing angles and frequencies. To the extent that it provides independent information, the use of multiple viewing angles ...

Ross N. Hoffman; Christopher Grassotti; Ronald G. Isaacs; Thomas J. Kleespies

1989-05-01T23:59:59.000Z

245

Browse Societies by Language -- E-print Network Societies by Language:  

Office of Scientific and Technical Information (OSTI)

Russian Russian The following scientific society websites represent research and development interests that are within the E-print Network scope. They communicate primarily in Russian or related languages. Some may have minimal English content on the linking pages. Some of these societies may also provide electronic publications and/or information concerning scientific literature published in Russian or related languages. The intent of this compilation is to provide an easy entry point into these scientific communities to encourage the formation of personal contacts among researchers pursuing similar interests. You are currently viewing the page that provides access to Russian language societies. If you wish to view societies in another language, please select

246

Browse Societies by Language -- E-print Network Societies by Language:  

Office of Scientific and Technical Information (OSTI)

Japanese Japanese The following scientific society websites represent research and development interests that are within the E-print Network scope. They communicate primarily in Japanese. Some may have minimal English content on the linking pages. In addition, some of these societies may also provide electronic publications and/or information concerning scientific literature published in Japanese. The intent of this compilation is to provide an easy entry point into these scientific communities to encourage the formation of personal contacts among researchers pursuing similar interests. You are currently viewing the page that provides access to Japanese language societies. If you wish to view societies in another language, please select from the following options.

247

Fluid characterisation and drop impact in inkjet printing for organic semiconductor devices  

E-Print Network (OSTI)

elements provides a typical example. A hole-injection layer and a luminescent layer are formed between a cathode and a transparent indium tin oxide (ITO) anode coated on to a glass substrate. The two layers are deposited by regions of less wettable... -suited for integration with metal oxide dielectric layers, which could enable improved optical and electrical performance. Figure 2-12. Photograph of a 10,000 cd m-2 OLED printed using Ir-based polyhedral oligomeric silsesquioxane (POSS) macromolecules emitting at a...

Jung, Sungjune

2011-07-12T23:59:59.000Z

248

From quantum Bayesian inference to quantum tomography  

E-Print Network (OSTI)

We derive an expression for a density operator estimated via Bayesian quantum inference in the limit of an infinite number of measurements. This expression is derived under the assumption that the reconstructed system is in a pure state. In this case the estimation corresponds to an averaging over a generalized microcanonical ensemble of pure states satisfying a set of constraints imposed by the measured mean values of the observables under consideration. We show that via the ``purification'' ansatz, statistical mixtures can also be consistently reconstructed via the quantum Bayesian inference scheme. In this case the estimation corresponds to averaging over the generalized canonical ensemble of states satisfying the given constraints, and the reconstructed density operator maximizes the von Neumann entropy (i.e., this density operator is equal to the generalized canonical density operator which follows from the Jaynes principle of maximum entropy). We study in detail the reconstruction of the spin-1/2 density operator and discuss the logical connection between the three reconstruction schemes, i.e., (1) quantum Bayesian inference, (2) reconstruction via the Jaynes principle of maximum entropy, and (3) discrete quantum tomography.

R. Derka; V. Buzek; G. Adam; P. L. Knight

1997-01-23T23:59:59.000Z

249

Portable Digital Radiography and Computed Tomography Manual  

SciTech Connect

This user manual describes the function and use of the portable digital radiography and computed tomography (DRCT) scanner. The manual gives a general overview of x-ray imaging systems along with a description of the DRCT system. An inventory of the all the system components, organized by shipping container, is also included. In addition, detailed, step-by-step procedures are provided for all of the exercises necessary for a novice user to successfully collect digital radiographs and tomographic images of an object, including instructions on system assembly and detector calibration and system alignment. There is also a short section covering the limited system care and maintenance needs. Descriptions of the included software packages, the DRCT Digital Imager used for system operation, and the DRCT Image Processing Interface used for image viewing and tomographic data reconstruction are given in the appendixes. The appendixes also include a cheat sheet for more experienced users, a listing of known system problems and how to mitigate them, and an inventory check-off sheet suitable for copying and including with the machine for shipment purposes.

Not Available

2007-11-01T23:59:59.000Z

250

Comparative analysis of print media coverage of nuclear power and coal issues  

SciTech Connect

Nuclear power has been a more important topic than has coal for the print media, and has received somewhat different treatment. Compared to the number of coal articles, almost twice as many nuclear power articles were printed from 1972 through 1976. Also, while the number of nuclear power articles increased somewhat steadily from 1972 through 1976, the number of coal articles peaked in 1974 and has decreased since. The newspapers sampled gave more prominence to nuclear articles in terms of article type and article location. Also, nuclear articles were more often issue-oriented compared to coal articles. Coal articles were most often about coal mining, labor force concerns, and regulations controls. Nuclear power articles, on the other hand, were mostly about reactor operation. The main issues discussed in the coal articles pertained most to political decisions affecting coal use, to strikes, and to health and safety. The main nuclear issues pertained to economics, to health and safety, and to political decisions. Newspapers handled nuclear power articles in a more polarized manner compared to coal articles which were handled in a more neutral manner. Magazine articles were significantly more antinuclear than anticoal. Some qualifications about these conclusions are included. (LTN)

Nealey, S.M.; Rankin, W.L.; Montano, D.E.

1978-10-01T23:59:59.000Z

251

Ultrasonically Sprayed and Inkjet Printed Thin Film Electrodes for Organic Solar Cells  

Science Conference Proceedings (OSTI)

Thin film pi-conjugated poly(3,4ethylenedioxythiophene): poly(styrenesulphonate) (PEDOT:PSS) as a hole transport layer on indium tin oxide is a key element in some of the most efficient organic photovoltaic and light emitting devices to date. Films are typically deposited by spincoating, which is not readily scalable. In this paper we investigate the critical parameters for both inkjet and ultrasonic spray deposition of PEDOT:PSS thin films on commercial indium tin oxide as a potentially scalable approach to contact formation. Inkjet parameters investigated include drop spacing and substrate temperature. Ultrasonic spray coating parameters investigated include substrate temperature and solution flow rate. We also show that the ink viscosity has a Newtonian character, making it well suited for inkjet printing. Films were characterized via optical profilometry, sheet resistance and atomic force microscopy. Optimized inkjet printed and ultrasonic sprayed PEDOT:PSS films were then compared to spincast layers in a prototypical bulk heterojunction photovoltaic device employing a poly(3-hexylthiophene) and [6,6]-PCBM (6,6-phenylC61-butyric acid-methyl ester) blend as the absorber. Practically all three approaches produced devices of comparable efficiency. Efficiencies were 3.6%, 3.5% and 3.3% for spin, spray and inkjet depositions respectively.

Steirer, K. X.; Berry, J. J.; Reese, M. O.; van Hest, M. F. A. M.; Miedaner, A.; Liberatore, M. W.; Collins, R. T.; Ginley, D. S.

2009-01-01T23:59:59.000Z

252

DOE-HDBK-1016/2-93; DOE Fundamentals Handbook Engineering Symbology, Prints, and Drawings Volume 2 of 2  

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

6/2-93 6/2-93 JANUARY 1993 DOE FUNDAMENTALS HANDBOOK ENGINEERING SYMBOLOGY, PRINTS, AND DRAWINGS Volume 2 of 2 U.S. Department of Energy FSC-6910 Washington, D.C. 20585 Distribution Statement A. Approved for public release; distribution is unlimited. This document has been reproduced directly from the best available copy. Available to DOE and DOE contractors from the Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, TN 37831. Available to the public from the National Technical Information Services, U.S. Department of Commerce, 5285 Port Royal., Springfield, VA 22161. Order No. DE93012181 DOE-HDBK-1016/2-93 ENGINEERING SYMBOLOGY, PRINTS, AND DRAWINGS ABSTRACT The Engineering Sym bology, Prints, and Drawings Handbook was developed to assist nuclear facility operating contractors in providing operators, maintenance personnel, and technical

253

DOE-HDBK-1016/1-93; DOE Fundamentals Handbook Engineering Symbology, Prints, and Drawings Volume 1 of 2  

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

016/1-93 016/1-93 JANUARY 1993 DOE FUNDAMENTALS HANDBOOK ENGINEERING SYMBOLOGY, PRINTS, AND DRAWINGS Volume 1 of 2 U.S. Department of Energy FSC-6910 Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. This document has been reproduced directly from the best available copy. Available to DOE and DOE contractors from the Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, TN37831. Available to the public from the National Technical Information Service, U.S. Department of Commerce, 5285 Port Royal Rd., Springfield, VA 22161. Order No. DE93012220 DOE-HDBK-1016/1-93 ENGINEERING SYMBOLOGY, PRINTS, AND DRAWINGS ABSTRACT The Engineering Sym bology, Prints, and Drawings Handbook was developed to assist nuclear facility operating contractors in providing operators, maintenance personnel, and

254

Inkjet printing and low power laser annealing of silver nanoparticle traces for the realization of low resistivity lines for flexible electronics  

Science Conference Proceedings (OSTI)

We report on the realization of low resistance silver lines by inkjet printing of a commercial silver-based ink on a flexible kapton substrate and subsequent low energy laser annealing to promote nanoparticle coalescence. Our approach resulted in low ... Keywords: Flexible electronics, Inkjet printing, Laser annealing, Thin films

A. Chiolerio; G. Maccioni; P. Martino; M. Cotto; P. Pandolfi; P. Rivolo; S. Ferrero; L. Scaltrito

2011-08-01T23:59:59.000Z

255

Allan Cormack, Computerized Axial Tomography (CAT), and Magnetic Resonance  

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

Allan M. Cormack, Computerized Axial Tomography (CAT) Allan M. Cormack, Computerized Axial Tomography (CAT) and Magnetic Resonance Imaging (MRI) Resources with Additional Information magnetic resonance imaging system Computed axial tomography, commonly known as CAT scanning, was introduced in 1972. During a CAT scan, a large coil of x-ray tubes rotates around the patient's body, taking x-rays from all angles. A computer integrates all of these x-rays into a single, three-dimensional image on a television screen. The data can be saved on the computer. Allan M. Cormack, a high energy physicist at Tufts University, shared the 1979 Nobel Prize in Physiology and Medicine for his key work in developing the methods for CAT scanners. At the time of development, these methods were widely regarded as the most significant advance in medical radiography since the 1895 discovery of x-rays.

256

Browse Societies by Language -- E-print Network Societies by Language:  

Office of Scientific and Technical Information (OSTI)

German German The following scientific society websites represent research and development interests that are within the E-print Network scope. They communicate primarily in German. Some may have English content on the linking pages. In addition, some of these societies may also provide electronic publications and/or information concerning scientific literature published in German. The intent of this compilation is to provide an easy entry point into these scientific communities to encourage the formation of personal contacts among researchers pursuing similar interests. You are currently viewing the page that provides access to German language societies. If you wish to view societies in another language, please select from the following options. Chinese Dutch English

257

Browse Societies by Language -- E-print Network Societies by Language:  

Office of Scientific and Technical Information (OSTI)

Italian Italian The following scientific society websites represent research and development interests that are within the E-print Network scope. They communicate primarily in Italian. Some may have minimal English content on the linking pages. In addition, some of these societies may also provide electronic publications and/or information concerning scientific literature published in Italian. The intent of this compilation is to provide an easy entry point into these scientific communities to encourage the formation of personal contacts among researchers pursuing similar interests. You are currently viewing the page that provides access to Italian language societies. If you wish to view societies in another language, please select from the following options. Chinese

258

Printed circuit board impedance matching step for microwave (millimeter wave) devices  

SciTech Connect

An impedance matching ground plane step, in conjunction with a quarter wave transformer section, in a printed circuit board provides a broadband microwave matching transition from board connectors or other elements that require thin substrates to thick substrate (>quarter wavelength) broadband microwave (millimeter wave) devices. A method of constructing microwave and other high frequency electrical circuits on a substrate of uniform thickness, where the circuit is formed of a plurality of interconnected elements of different impedances that individually require substrates of different thicknesses, by providing a substrate of uniform thickness that is a composite or multilayered substrate; and forming a pattern of intermediate ground planes or impedance matching steps interconnected by vias located under various parts of the circuit where components of different impedances are located so that each part of the circuit has a ground plane substrate thickness that is optimum while the entire circuit is formed on a substrate of uniform thickness.

Pao, Hsueh-Yuan; Aguirre, Jerardo; Sargis, Paul

2013-10-01T23:59:59.000Z

259

Browse Societies by Language -- E-print Network Societies by Language:  

Office of Scientific and Technical Information (OSTI)

Other Other The following scientific society websites represent research and development interests that are within the E-print Network scope, but are in a language not found on one of the other lists of Scientific Societies. These sites may have some minimal English content on the linking pages. In addition, some of these societies may also provide electronic publications and/or information concerning scientific literature published in alternative languages. The intent of this compilation is to provide an easy entry point into these scientific communities to encourage the formation of personal contacts among researchers pursuing similar interests. You are currently viewing the page that provides access to societies in languages other than one of the primary languages. If you wish to view

260

Browse Societies by Language -- E-print Network Societies by Language:  

Office of Scientific and Technical Information (OSTI)

French French The following scientific society websites represent research and development interests that are within the E-print Network scope. They communicate in French. Some may have minimal English content on the linking pages. In addition, some of these societies may also provide electronic publications and/or information concerning scientific literature published in French. The intent of this compilation is to provide an easy entry point into these scientific communities to encourage the formation of personal contacts among researchers pursuing similar interests. You are currently viewing the page that provides access to French language societies. If you wish to view societies in another language, please select from the following options. Chinese Dutch English

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


261

Browse Societies by Language -- E-print Network Societies by Language:  

Office of Scientific and Technical Information (OSTI)

Dutch Dutch The following scientific society websites represent research and development interests that are within the E-print Network scope. They communicate primarily in Dutch. Some may have English content on the linking pages. In addition, some of these societies may also provide electronic publications and/or information concerning scientific literature published in Dutch. The intent of this compilation is to provide an easy entry point into these scientific communities to encourage the formation of personal contacts among researchers pursuing similar interests. You are currently viewing the page that provides access to Dutch language societies. If you wish to view societies in another language, please select from the following options. Chinese English French

262

Browse Societies by Language -- E-print Network Societies by Language:  

Office of Scientific and Technical Information (OSTI)

Nordic Nordic The following scientific society websites represent research and development interests that are within the E-print Network scope. They communicate primarily in one of the Nordic languages. Some may have minimal English content on the linking pages. Some of these societies may also provide electronic publications and/or information concerning scientific literature published in Nordic languages. The intent of this compilation is to provide an easy entry point into these communities in the Nordic region and to encourage the formation of personal contacts among researchers pursuing similar interests. You are currently viewing the page that provides access to Nordic language societies. If you wish to view societies in another language, please select from the following options.

263

Browse by Discipline -- E-print Network Subject Pathways: Fission and  

Office of Scientific and Technical Information (OSTI)

H I J K L M N O P Q R S H I J K L M N O P Q R S T U V W X Y Z Hale, Piers J. (Piers J. Hale) - Department of the History of Science, University of Oklahoma Halvorson, Hans (Hans Halvorson) - Department of Philosophy, Princeton University Hammer, David (David Hammer) - Departments of Education & Physics and Astronomy, Tufts University Hansen, James E. (James E. Hansen) - Goddard Institute for Space Studies Harnad, Stevan (Stevan Harnad) - E-Prints on Cognitive Psychology & School of Electronics and Computer Science, University of Southampton Harrell, Mara (Mara Harrell) - Department of Philosophy, Carnegie Mellon University Harrington, Jonathan (Jonathan Harrington) - Institut für Phonetik und Sprachverarbeitung, Ludwig-Maximilians-Universität München

264

Browse Societies by Language -- E-print Network Societies by Language:  

Office of Scientific and Technical Information (OSTI)

English English The following scientific society websites represent research and development interests that are within the E-print Network scope. They communicate primarily in English. In addition, some of these societies may also provide electronic publications and/or information concerning scientific literature published in English. The intent of this compilation is to provide an easy entry point into these scientific communities to encourage the formation of personal contacts among researchers pursuing similar interests. You are currently viewing the page that provides access to English language societies. If you wish to view societies in another language, please select from the following options. Chinese Dutch French German Italian Japanese Nordic Russian Spanish and Portuguese

265

Browse Societies by Language -- E-print Network Societies by Language:  

Office of Scientific and Technical Information (OSTI)

Spanish and Portuguese Spanish and Portuguese The following scientific society websites represent research and development interests that are within the E-print Network scope. They communicate primarily in Spanish, Portuguese, or Catalan. Some may have minimal English content on the linking pages. In addition, some of these societies may also provide electronic publications and/or information concerning scientific literature published in Spanish, Portuguese, or Catalan. The intent of this compilation is to provide an easy entry point into these scientific communities to encourage the formation of personal contacts among researchers pursuing similar interests. You are currently viewing the page that provides access to Spanish and Portuguese language societies. If you wish to view societies in another

266

Browse Societies by Language -- E-print Network Societies by Language:  

Office of Scientific and Technical Information (OSTI)

Chinese Chinese The following scientific society websites represent research and development interests that are within the E-print Network scope. They communicate primarily in Chinese. Some may have minimal English content on the linking pages. In addition, some of these societies may also provide electronic publications and/or information concerning scientific literature published in Chinese. The intent of this compilation is to provide an easy entry point into these scientific communities to encourage the formation of personal contacts among researchers pursuing similar interests. You are currently viewing the page that provides access to Chinese language societies. If you wish to view societies in another language, please select from the following options. Dutch

267

Low AC Loss YBCO Coated Conductor Geometry by Direct Inkjet Printing  

Science Conference Proceedings (OSTI)

The second generation (2G) high temperature superconductors (HTS) wire offers potential benefits for many electric power applications, including ones requiring filamentized conductors with low ac loss, such as transformers and fault current limiters. However, the use of 2G wire in these applications requires the development of both novel multi-filamentary conductor designs with lower ac losses and the development of advanced manufacturing technologies that enable the low-cost manufacturing of these filamentized architectures. This Phase I SBIR project focused on testing inkjet printing as a potential low-cost, roll-to-roll manufacturing technique to fabricate potential low ac loss filamentized architectures directly on the 2G template strips.

Rupich, Martin, Dr. [American Superconductor Corporation; Duckworth, Robert, Dr. [Oak Ridge National Laboratory

2009-10-01T23:59:59.000Z

268

Method for formation of high quality back contact with screen-printed local back surface field  

SciTech Connect

A thin silicon solar cell having a back dielectric passivation and rear contact with local back surface field is described. Specifically, the solar cell may be fabricated from a crystalline silicon wafer having a thickness from 50 to 500 micrometers. A barrier layer and a dielectric layer are applied at least to the back surface of the silicon wafer to protect the silicon wafer from deformation when the rear contact is formed. At least one opening is made to the dielectric layer. An aluminum contact that provides a back surface field is formed in the opening and on the dielectric layer. The aluminum contact may be applied by screen printing an aluminum paste having from one to 12 atomic percent silicon and then applying a heat treatment at 750 degrees Celsius.

Rohatgi, Ajeet (Marietta, GA); Meemongkolkiat, Vichai (Atlanta, GA)

2010-11-30T23:59:59.000Z

269

Wellcome Collection's First Major Temporary Exhibition ...Leonardo da Vinci Drawings, Andy Warhol Prints, Live Heart Surgery, Sacred Heart  

E-Print Network (OSTI)

The Heart Wellcome Collection's First Major Temporary Exhibition ...Leonardo da Vinci Drawings, Andy Warhol Prints, Live Heart Surgery, Sacred Heart Imagery Never Before Seen In Europe, Egyptian Book of the Dead, Foundling Cards, Venous Anatomy Tables... - The Heart book announced; writers include Jonathan

Maizels, Rick

270

Dynamics of Atmospheres and Oceans, 7 (1983) 95-109 Elsevier Scientific Publishing Company, Amsterdam -Printed in The Netherlands  

E-Print Network (OSTI)

into the ocean on an 8° ? 10° grid. Assuming no net annual heat storage, the annual surface heat fluxes into any, Amsterdam - Printed in The Netherlands 95 ANNUAL OCEANIC HEAT TRANSPORTS COMPUTED FROM AN ATMOSPHERIC MODEL 24, 1982) ABSTRACT Miller, J.R., Russell, G.L. and Tsang, L.-C., 1983. Annual oceanic heat transports

Fridlind, Ann

271

MECHANICS OF SOLIDS [published as a section of the article on MECHANICS in the 1993 printing of the  

E-Print Network (OSTI)

MECHANICS OF SOLIDS [published as a section of the article on MECHANICS in the 1993 printing INTRODUCTION The application of the principles of mechanics to bulk matter is conventionally divided into the mechanics of fluids and the mechanics of solids. The entire subject is often called continuum mechanics

272

energy.gov -Speeches (Print Version) Tuesday, February 4, 2003 http://www.energy.gov/HQDocs/speeches/2003/febss/  

E-Print Network (OSTI)

energy.gov - Speeches (Print Version) Tuesday, February 4, 2003 http://www.energy.gov/HQDocs/speeches/2003/febss/ 04BudgetPressConferenceRemarks_v.html Page: 1 Press Conference Remarks Energy Secretary Spencer Abraham 2004 DOE Budget Submission Forrestal Building Washington, DC February 3, 2003 Thank you

273

Last printed 3/16/2004 3:01 PM High-Frequency (Light) Borehole-Radar System  

E-Print Network (OSTI)

Last printed 3/16/2004 3:01 PM High-Frequency (Light) Borehole-Radar System Ramac from Mala Geoscience Packing List 1) Radar control unit (Ramac surface GPR system) (Old or New CU2 is O.K.). 2) Laptop computer with acquisition software, manuals, logbook and protocol sheets. 3) Backup system; zip, jaz, or CD

Barrash, Warren

274

Electrical Characterization of Printed Nanocrystalline Silicon Films, Cooperative Research and Development Final Report, CRADA Number CRD-07-00241  

DOE Green Energy (OSTI)

This CRADA helped Innovalight characterize and quantify their ink-based selective emitter technology. Controlled localized doping of selective emitter structures via Innovalight Silicon Ink technology was demonstrated. Both secondary ion mass spectrometry and scanning capacitance microscopy revealed; abrupt lateral dopant profiles at ink-printed boundaries. Uniform doping of iso- and pyramidal surfaces was also verified using scanning electron microscopy dopant contrast imaging.

Young, D.

2011-05-01T23:59:59.000Z

275

Annals of Nuclear Eneroy, Vol. 7. pp. 171 to 183 Pergamon Press Ltd. 1980. Printed in Great Britain  

E-Print Network (OSTI)

slab reactor in the modified one-group theory, and subsequently, the neutronresponse to twoAnnals of Nuclear Eneroy, Vol. 7. pp. 171 to 183 Pergamon Press Ltd. 1980. Printed in Great Britain I. P.~ZSIT*and G. TH. ANALYTIS~ Department of Nuclear Engineering,Queen Mary College,Mile End Road

Pázsit, Imre

276

Annals of Nuclear Energy, Vol. 7, pp. 535 to 539 Pergamon Press Ltd. 1980. Printed in Great Britain  

E-Print Network (OSTI)

ON MULTI-MEDIA CALCULATIONS IN THE THEORY OF NEUTRON DIFFUSION J. R. MAIORINO* and C. E. SIEWERT NuclearAnnals of Nuclear Energy, Vol. 7, pp. 535 to 539 Pergamon Press Ltd. 1980. Printed in Great Britain) Abstract--The FN method is used to solve the critical problem for a three-region reactor and to compute

Siewert, Charles E.

277

Sequential Printing by Laser-Induced Forward Transfer To Fabricate a Polymer Light-Emitting Diode Pixel  

E-Print Network (OSTI)

Sequential Printing by Laser-Induced Forward Transfer To Fabricate a Polymer Light-Emitting Diode-1015, Lausanne, Switzerland ABSTRACT: Patterned deposition of polymer light-emitting diode (PLED Organic light-emitting diodes (OLEDs) have been investigated in detail for nearly a quarter of a century,1

278

Red-green-blue polymer light-emitting diode pixels printed by optimized laser-induced forward transfer  

E-Print Network (OSTI)

Red-green-blue polymer light-emitting diode pixels printed by optimized laser-induced forward tri-color organic light-emitting diode (OLED) pixels. At reduced pressures, and with a defined donor already been used to fabricate basic small-molecule organic light-emitting diodes (OLEDs)2,3 and polymeric

279

Smart infrastructure for carbon foot print analysis of Electric Vehicles V Suresh, G Hill, Prof P T Blythe  

E-Print Network (OSTI)

Smart infrastructure for carbon foot print analysis of Electric Vehicles V Suresh, G Hill, Prof P of electric vehicles through on-road testing, user led trials and the analysis of the data collected from, trip profile, auxiliary loads and driving styles to determine how the battery discharges and recharges

Newcastle upon Tyne, University of

280

Pre-Print Version Impaired Control of Effector T cells by Regulatory T Cells: a Clue to Loss of Oral  

E-Print Network (OSTI)

and to controls. Conclusion. Our results indicate that effector T lymphocytes from active CD become resistant of CD4+CD25+FOXP3+ LPL were significantly increased in patients with active CD, proliferation and IFNPre-Print Version 1 Impaired Control of Effector T cells by Regulatory T Cells: a Clue to Loss

Paris-Sud XI, Université de

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


281

Quantum process tomography of a single solid state qubit  

E-Print Network (OSTI)

We present an example of quantum process tomography performed on a single solid state qubit. The qubit used is two energy levels of the triplet state in the Nitrogen-Vacancy defect in Diamond. Quantum process tomography is applied to a qubit which has been allowed to decohere for three different time periods. In each case the process is found in terms of the $\\chi$ matrix representation and the affine map representation. The discrepancy between experimentally estimated process and the closest physically valid process is noted.

M. Howard; J. Twamley; C. Wittmann; T. Gaebel; F. Jelezko; J. Wrachtrup

2005-03-16T23:59:59.000Z

282

Quantum Process Tomography via L1-norm Minimization  

E-Print Network (OSTI)

For an initially well designed but imperfect quantum information system, the process matrix is almost sparse in an appropriate basis. Existing theory and associated computational methods (L1-norm minimization) for reconstructing sparse signals establish conditions under which the sparse signal can be perfectly reconstructed from a very limited number of measurements (resources). Although a direct extension to quantum process tomography of the L1-norm minimization theory has not yet emerged, the numerical examples presented here, which apply L1-norm minimization to quantum process tomography, show a significant reduction in resources to achieve a desired estimation accuracy over existing methods.

Robert L. Kosut

2008-12-23T23:59:59.000Z

283

Positron emission tomography in the evaluation of subdural hematomas  

SciTech Connect

Fifteen patients with 21 subdural effusions were investigated both with transmission computer assisted tomography (CAT) and positron emission tomography (PET). The tracer in the emission studies was /sup 68/Ga-EDTA. Twelve lesions were visualized both with CAT and PET. Five lesions that were negative or doubtful on CAT were visualized with PET, whereas four lesions negative or doubtful on PET were demonstrated by CAT. The two methods complement each other due to the fact that they are based on different mechanisms: CAT mainly on attenuation of the fluid collection. PET on isotope accumulation, particularly in the hematoma membranes.

Ericson, K.; Bergstroem, M.; Eriksson, L.

1980-12-01T23:59:59.000Z

284

The solar energy reaching the earth's surface in one day exceeds humankind's total energy requirements for thirty years  

E-Print Network (OSTI)

by the cell. Cells based on "hot" carriers are also being investigated since operationally they would be very into electricity when absorbed in devices known as solar cells. Silicon is the most common material from which to make these cells. It is also the material most widely used in microelectronics. Our program

285

Statistical estimation of the quality of quantum-tomography protocols  

SciTech Connect

We present a complete methodology for testing the performances of quantum tomography protocols. The theory is validated by several numerical examples and by the comparison with experimental results achieved with various protocols for whole families of polarization states of qubits and ququarts including pure, mixed, entangled, and separable.

Bogdanov, Yu. I.; Bukeev, I. D. [Institute of Physics and Technology, Russian Academy of Sciences, 117218, Moscow (Russian Federation); Brida, G.; Genovese, M.; Shurupov, A. P. [INRIM, Strada delle Cacce 91 I-10135, Torino (Italy); Kravtsov, K. S. [Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, 119991 (Russian Federation); Kulik, S. P.; Soloviev, A. A. [Faculty of Physics, Moscow State University, 119992, Moscow (Russian Federation); Moreva, E. V. [Moscow National Research Nuclear University ' ' MEPHI' ' , 115409, Moscow (Russian Federation)

2011-10-15T23:59:59.000Z

286

Experimental Cerenkov luminescence tomography of the mouse model with SPECT  

E-Print Network (OSTI)

Experimental Cerenkov luminescence tomography of the mouse model with SPECT imaging validation imaging resulting from Cerenkov radiation has become a motivating topic recently and will potentially open new avenues for the study of small animal imaging. Cerenkov-based optical imaging taken from living

Tian, Jie

287

A fuzzy segmentation method for Computed Tomography images  

Science Conference Proceedings (OSTI)

This paper describes a way of medical image segmentation using an appropriately defined fuzzy clustering method based on a fuzzy similarity relation. The considered relation is defined in terms of the Minkowski metric. A fuzzy similarity relation based ... Keywords: CT, computed tomography, data partitional clustering, fuzzy clustering, fuzzy segmentation, fuzzy similarity relations, image segmentation, medical imaging

Martin Tabakov

2007-04-01T23:59:59.000Z

288

Process uniformity for plasma etchback and desmear in printed wiring board manufacturing  

SciTech Connect

In the manufacture of printed wiring boards (PWB), plasma etchback and desmear processes facilitate the making of good mechanical and electrical bonds of copper inner layers to copper plating. Without sufficient plasma treatment, internal layer copper features receive inadequate polymer removal which results in circuit discontinuity during the plating process. Additionally, the plasma serves to roughen the polymer wall of drilled holes which improves copper adhesion. To ensure proper plasma treatment, careful adherence to strict production guidelines is essential. These guidelines include attention to several critical criteria in placement, pretreatment and treatment of the PWBs during the plasma process; process verification via post plasma testing; and careful process monitoring throughout. In this brief, some guidelines for process monitoring and control will be discussed. A description of a new plasma monitor utilizing optical emission spectroscopy (OES), developed cooperatively between Sandia National Laboratories, National Consortium for Manufacturing Sciences (NCMS) and Texas Instruments Inc., will be discussed along with possible benefits derived from in situ monitoring of plasma systems.

Ward, P.P.; Smith, M.L.; Stevenson, J.O. [Sandia National Labs., Albuquerque, NM (United States); Smedley, R. [Texas Instruments, Austin, TX (United States)

1996-08-01T23:59:59.000Z

289

The influence of temperature and humidity on the wettability of immersion tin coated printed wiring boards  

SciTech Connect

This paper investigates the merits and drawbacks of immersion tin coatings as potential printed wiring board (PWB) surface finishes. Immersion tin films applied in various thicknesses (0.2 to 2 {mu}m) to different copper substrates were characterized relative to thermal stability and shelflife. Thermal excursions included those typical in mixed technology assembly processes. Exposure to temperature/humidity was varied from near ambient (35{degree}C/85%RH) to harsh (steam aging). A minimum thickness of {approximately}60{mu}in (1.5{mu}m) was determined to be critical for assembly operations involving multiple thermal excursions. Even though formation of Cu-Sn intermetallic compounds (IMC) is facile, at the copper-tin interface, these compounds do not adversely affect the soldering performance, as long as the IMC phase is protected by a tin surface layer. Immersion tin finishes are relatively stable to thermal exposure, but are readily oxidized in the presence of humidity. This oxide growth is directly responsible for solderability degradation. The underlying copper substrate was also found to have a significant impact on the thermal stability of tin films. An electroless copper substrate caused significantly more intermetallic formation, that resulted in poor solderability even under moderate temperature, humidity conditions.

Ray, U.; Artaki, I. [AT and T Bell Labs., Princeton, NJ (United States); Vianco, P.T. [Sandia National Labs., Albuquerque, NM (United States)

1993-12-31T23:59:59.000Z

290

Transport of ions in a segmented linear Paul trap in printed-circuit-board technology  

E-Print Network (OSTI)

We describe the construction and operation of a segmented linear Paul trap, fabricated in printed-circuit-board technology with an electrode segment width of 500 microns. We prove the applicability of this technology to reliable ion trapping and report the observation of Doppler cooled ion crystals of Ca-40 with this kind of traps. Measured trap frequencies agree with numerical simulations at the level of a few percent from which we infer a high fabrication accuracy of the segmented trap. To demonstrate its usefulness and versatility for trapped ion experiments we study the fast transport of a single ion. Our experimental results show a success rate of 99.0(1)% for a transport distance of 2x2mm in a round-trip time of T=20us, which corresponds to 4 axial oscillations only. We theoretically and experimentally investigate the excitation of oscillations caused by fast ion transports with error-function voltage ramps: For a slightly slower transport (a round-trip shuttle within T=30us) we observe non-adiabatic motional excitation of 0.89(15)meV.

G. Huber; T. Deuschle; W. Schnitzler; R. Reichle; K. Singer; F. Schmidt-Kaler

2007-11-19T23:59:59.000Z

291

Jetting, In-Nozzle Meniscus Motion and Nozzle-Plate Flooding in an Industrial Drop-on-Demand Print Head  

E-Print Network (OSTI)

-up of fluid in an annulus around the nozzle (flooding rate) has been characterized and compared with models for the net ink flow through the nozzle. Introduction In a commercial drop-on-demand (DOD) inkjet print head, the ink meniscus at nozzles... . The flash, focused by a condenser, illuminates the nozzles about 21 degrees off-axis from the opposite direction. The arrangement is configured to maximize the illumination reaching the camera lens within the space constraints. A protective glass plate...

Hsiao, W.-K.; Hoath, S.D.; Martin, G.D.; Hutchings, I.M.

2011-01-01T23:59:59.000Z

292

Resistivity Tomography At Silver Peak Area (DOE GTP) | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Resistivity Tomography At Silver Peak Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Single-Well and Cross-Well Resistivity At Silver Peak Area (DOE GTP) Exploration Activity Details Location Silver Peak Area Exploration Technique Single-Well and Cross-Well Resistivity Activity Date Usefulness not indicated DOE-funding Unknown References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Resistivity_Tomography_At_Silver_Peak_Area_(DOE_GTP)&oldid=689883" Categories:

293

Discussion - Next Step for Fukushima Daiichi Muon Tomography  

Science Conference Proceedings (OSTI)

Specification of Fukushima Daiichi Muon Tomography (FMT): (1) 18-feet (5.5-m) drift tube, 2-inch (5-cm) diameter; (2) 108 tubes per layer; (3) Unit layer = 2 layer (detection efficiency: 0.96 x 0.96 = 92%); (4) 12 or 16 layer per module; (5) 16 layers allows momentum analysis at 30% level; (6) 2 module per super module (5.5 x 11 m{sup 2}); and (7) FMT = 2 super module. By deploying MMT next to a research reactor, we will be able to measure the impact of low level radiation fields on muon tomography and reconstruction processes. Radiation level during reactor operation is {approx}50 {micro}Sv/h which provides similar radiation environment of inside the FMT radiation shield at Fukushima Daiichi. We will implement coincidence algorithm on the FPGA board.

Miyadera, Haruo [Los Alamos National Laboratory

2012-08-13T23:59:59.000Z

294

Using electrical impedance tomography to map subsurface hydraulic conductivity  

DOE Patents (OSTI)

The use of Electrical Impedance Tomography (EIT) to map subsurface hydraulic conductivity. EIT can be used to map hydraulic conductivity in the subsurface where measurements of both amplitude and phase are made. Hydraulic conductivity depends on at least two parameters: porosity and a length scale parameter. Electrical Resistance Tomography (ERT) measures and maps electrical conductivity (which can be related to porosity) in three dimensions. By introducing phase measurements along with amplitude, the desired additional measurement of a pertinent length scale can be achieved. Hydraulic conductivity controls the ability to flush unwanted fluid contaminants from the surface. Thus inexpensive maps of hydraulic conductivity would improve planning strategies for subsequent remediation efforts. Fluid permeability is also of importance for oil field exploitation and thus detailed knowledge of fluid permeability distribution in three-dimension (3-D) would be a great boon to petroleum reservoir analysts.

Berryman, James G. (Danville, CA); Daily, William D. (Livermore, CA); Ramirez, Abelardo L. (Pleasanton, CA); Roberts, Jeffery J. (Livermore, CA)

2000-01-01T23:59:59.000Z

295

Single electron quantum tomography in quantum Hall edge channels  

E-Print Network (OSTI)

We propose a quantum tomography protocol to measure single electron coherence in quantum Hall edge channels and therefore access for the first time the wave function of single electron excitations propagating in ballistic quantum conductors. Its implementation would open the way to quantitative studies of single electron decoherence and would provide a quantitative tool for analyzing single to few electron sources. We show how this protocol could be implemented using ultrahigh sensitivity noise measurement schemes.

Grenier, Charles; Bocquillon, Erwann; Parmentier, Franois D; Plaais, Bernard; Berroir, Jean-Marc; Fve, Gwendal; Degiovanni, Pascal; 10.1088/1367-2630/13/9/093007

2011-01-01T23:59:59.000Z

296

Single electron quantum tomography in quantum Hall edge channels  

E-Print Network (OSTI)

We propose a quantum tomography protocol to measure single electron coherence in quantum Hall edge channels and therefore access for the first time the wave function of single electron excitations propagating in ballistic quantum conductors. Its implementation would open the way to quantitative studies of single electron decoherence and would provide a quantitative tool for analyzing single to few electron sources. We show how this protocol could be implemented using ultrahigh sensitivity noise measurement schemes.

Charles Grenier; Rmy Herv; Erwann Bocquillon; Franois D. Parmentier; Bernard Plaais; Jean-Marc Berroir; Gwendal Fve; Pascal Degiovanni

2010-10-11T23:59:59.000Z

297

Prioritizing material recovery for end-of-life printed circuit boards  

Science Conference Proceedings (OSTI)

Highlights: Black-Right-Pointing-Pointer Material recovery driven by composition, choice of ranking, and weighting. Black-Right-Pointing-Pointer Economic potential for new recycling technologies quantified for several metrics. Black-Right-Pointing-Pointer Indicators developed for materials incurring high eco-toxicity costs. Black-Right-Pointing-Pointer Methodology useful for a variety of stakeholders, particularly policy-makers. - Abstract: The increasing growth in generation of electronic waste (e-waste) motivates a variety of waste reduction research. Printed circuit boards (PCBs) are an important sub-set of the overall e-waste stream due to the high value of the materials contained within them and potential toxicity. This work explores several environmental and economic metrics for prioritizing the recovery of materials from end-of-life PCBs. A weighted sum model is used to investigate the trade-offs among economic value, energy saving potentials, and eco-toxicity. Results show that given equal weights for these three sustainability criteria gold has the highest recovery priority, followed by copper, palladium, aluminum, tin, lead, platinum, nickel, zinc, and silver. However, recovery priority will change significantly due to variation in the composition of PCBs, choice of ranking metrics, and weighting factors when scoring multiple metrics. These results can be used by waste management decision-makers to quantify the value and environmental savings potential for recycling technology development and infrastructure. They can also be extended by policy-makers to inform possible penalties for land-filling PCBs or exporting to the informal recycling sector. The importance of weighting factors when examining recovery trade-offs, particularly for policies regarding PCB collection and recycling are explored further.

Wang Xue, E-mail: xxw6590@rit.edu [Golisano Institute for Sustainability, Rochester Institute of Technology, 111 Lomb Memorial Drive, Rochester, NY 14623 (United States); Gaustad, Gabrielle, E-mail: gabrielle.gaustad@rit.edu [Golisano Institute for Sustainability, Rochester Institute of Technology, 111 Lomb Memorial Drive, Rochester, NY 14623 (United States)

2012-10-15T23:59:59.000Z

298

In-situ Three Dimensional (3D) X-Ray Synchrotron Tomography of ...  

Science Conference Proceedings (OSTI)

Local measurements of da/dN were possible with the 3D data sets obtained from tomography. In situ measurements of crack opening displacement (COD) were...

299

Development of a seismic tomography system for use on a geotechnical centrifuge.  

E-Print Network (OSTI)

??[Truncated abstract] Seismic tomography has been extensively used in geophysics for different purposes such as geological mapping and prospecting for oil and gas. In geophysics, (more)

Rammah, Khader Ibrahim

2008-01-01T23:59:59.000Z

300

Understanding Cellulose Through Molecular Simulation and Electron Tomography  

SciTech Connect

High-resolution cellulose crystal structures have been determined from diffraction experiments using large diameter microfibrils as the sample material. However, cellulose microfibrils in plants are much smaller in diameter, and are more difficult to directly examine experimentally. Molecular dynamics simulation combined with quantum chemical calculations can help to elucidate the structure and dynamics of small diameter cellulose microfibrils. These simulation techniques also aid in the interpretation of electron tomography volumetric structural data from maize cell walls, where pretreatment with dilute acid or ammonia reveals microfibril geometry.

Matthews, J.

2013-01-01T23:59:59.000Z

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While these samples are representative of the content of NLEBeta,
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301

Quantum process tomography of a controlled-NOT gate  

E-Print Network (OSTI)

We demonstrate complete characterization of a two-qubit entangling process - a linear optics controlled-NOT gate operating with coincident detection - by quantum process tomography. We use maximum-likelihood estimation to convert the experimental data into a physical process matrix. The process matrix allows accurate prediction of the operation of the gate for arbitrary input states, and calculation of gate performance measures such as the average gate fidelity, average purity and entangling capability of our gate, which are 0.90, 0.83 and 0.73, respectively.

J. L. O'Brien; G. J. Pryde; A. Gilchrist; D. F. V. James; N. K. Langford; T. C. Ralph; A. G. White

2004-02-23T23:59:59.000Z

302

Direct and Parallel Tomography of a Quantum Process  

E-Print Network (OSTI)

As the method to completely characterize quantum dynamical processes, quantum process tomography (QPT) is vitally important for quantum information processing and quantum control, where the faithfulness of quantum devices plays an essential role. Here via weak measurements, we present a new QPT scheme characterized by its directness and parallelism. Comparing with the existing schemes, our scheme needs a simpler state preparation and much fewer experimental setups. Furthermore, each parameter of the quantum process is directly determined from only five experimental values in our scheme, meaning that our scheme is robust against the accumulation of errors.

Yu-Xiang Zhang; Shengjun Wu; Zeng-Bing Chen

2013-09-23T23:59:59.000Z

303

Estimating the risk associated with computerized tomography doses  

SciTech Connect

The largest annual whole- body dose to the US population from man-made radiation is from medical sources. According to the BEIR report, the use of diagnostic x-rays by the medical profession has increased in recent years at an annual rate of 1 to 4%. Risk factors developed by the BEIR committee can be used to estimate the risk to the population due to the exposure incurred through medical radiography. In this paper, these risk factors are employed to obtain an estimate of risk due to radiation exposure from computerized tomography (CT).

Yalcintas, M.G.; Leggett, R.W.; Dunning, D.E.; Nalcioglu, O.

1979-01-01T23:59:59.000Z

304

Spatial emission tomography reconstruction using Pitman-Yor process  

SciTech Connect

In this paper, we address the problem of emission tomography spatial reconstruction in three dimensions following a Bayesian nonparametric approach. Our model makes use of a generalization of the Dirichlet process called Pitman-Yor process. The problem in this approach is to deal with the infinite representation of the distribution in the inference. So we propose an efficient Markov Chain Monte-Carlo sampling scheme which is able to generate samples from the posterior distribution of the activity distribution. An application to 3D-PET reconstruction is presented.

Fall, Mame Diarra; Mohammad-Djafari, Ali [L2S, Supelec, 3 rue Joliot-Curie, F-91192 Gif-sur-Yvette cedex (France); Barat, Eric [CEA-LIST, LPSS, CEA-Saclay, F-91191 Gif-sur-Yvette (France); Comtat, Claude [SHFJ, CEA/DSV/I2BM, F-91401 Orsay (France)

2009-12-08T23:59:59.000Z

305

Our Next Two Steps for Fukushima Daiichi Muon Tomography  

SciTech Connect

After the vast disasters caused by the great earthquake and tsunami in eastern Japan, we proposed applying our Muon Tomography (MT) technique to help and improve the emergency situation at Fukushima Daiichi using cosmic-ray muons. A reactor-tomography team was formed at LANL which was supported by the Laboratory as a response to a request by the former Japanese Prime Minister, Naoto Kan. Our goal is to help the Japanese people and support remediation of the reactors. At LANL, we have carried out a proof-of-principle technical demonstration and simulation studies that established the feasibility of MT to image a reactor core. This proposal covers the next two critical steps for Fukushima Daiichi Muon Imaging: (1) undertake case study mock-up experiments of Fukushima Daiichi, and (2) system optimization. We requested funding to the US and Japanese government to assess damage of reactors at Fukushima Daiichi. The two steps will bring our project to the 'ready-to-go' level.

Miyadera, Haruo [Los Alamos National Laboratory

2012-04-11T23:59:59.000Z

306

Simultaneous CT and SPECT tomography using CZT detectors  

DOE Patents (OSTI)

A method for simultaneous transmission x-ray computed tomography (CT) and single photon emission tomography (SPECT) comprises the steps of: injecting a subject with a tracer compound tagged with a .gamma.-ray emitting nuclide; directing an x-ray source toward the subject; rotating the x-ray source around the subject; emitting x-rays during the rotating step; rotating a cadmium zinc telluride (CZT) two-sided detector on an opposite side of the subject from the source; simultaneously detecting the position and energy of each pulsed x-ray and each emitted .gamma.-ray captured by the CZT detector; recording data for each position and each energy of each the captured x-ray and .gamma.-ray; and, creating CT and SPECT images from the recorded data. The transmitted energy levels of the x-rays lower are biased lower than energy levels of the .gamma.-rays. The x-ray source is operated in a continuous mode. The method can be implemented at ambient temperatures.

Paulus, Michael J. (Knoxville, TN); Sari-Sarraf, Hamed (Lubbock, TX); Simpson, Michael L. (Knoxville, TN); Britton, Jr., Charles L. (Alcoa, TN)

2002-01-01T23:59:59.000Z

307

Temporal and spatial blood information estimation using Bayesian ICA in dynamic cerebral positron emission tomography  

Science Conference Proceedings (OSTI)

Positron emission tomography (PET) is a nuclear medicine technique that provides tomographic images of the distribution of positron-emitting radiopharmaceuticals. We have previously proposed a method for estimating an input blood curve based on a standard ... Keywords: Arterial blood sampling, Blood volume image, Ensemble learning, Independent component analysis, Positron emission tomography

Mika Naganawa; Yuichi Kimura; Kenji Ishii; Keiichi Oda; Kiichi Ishiwata

2007-09-01T23:59:59.000Z

308

WIND TOMOGRAPHY IN BINARY SYSTEMS O.Knill, R.Dgani and M.Vogel  

E-Print Network (OSTI)

WIND TOMOGRAPHY IN BINARY SYSTEMS O.Knill, R.Dgani and M.Vogel ETH-Zurich, CH-8092, Switzerland method is particularly suitable for determining the velocity laws of stellar winds. 1. WIND TOMOGRAPHY AND ABEL'S INTEGRAL Binary systems in which a compact, point-like radiation source shines through the wind

Knill, Oliver

309

All-optical quantitative framework for bioluminescence tomography with non-contact measurement  

Science Conference Proceedings (OSTI)

In this contribution, we present an all-optical quantitative framework for bioluminescence tomography with non-contact measurement. The framework is comprised of four indispensable steps: extraction of the geometrical structures of the subject, light ... Keywords: All-optical, bioluminescence tomography, non-contact, quantitative framework, surface extraction

Xue-Li Chen; Heng Zhao; Xiao-Chao Qu; Duo-Fang Chen; Xiao-Rui Wang; Ji-Min Liang

2012-02-01T23:59:59.000Z

310

Whole-Body Cerenkov Luminescence Tomography with the Finite Element SP3 Method  

E-Print Network (OSTI)

Whole-Body Cerenkov Luminescence Tomography with the Finite Element SP3 Method JIANGHONG ZHONG, JIE Bai oversaw the review of this article. Abstract--Generation of an accurate Cerenkov luminescence-active approach toward whole-body Cerenkov luminescence tomography. The finite element framework employs

Tian, Jie

311

Microwave tomography for breast cancer detection on Cell broadband engine processors  

Science Conference Proceedings (OSTI)

Microwave tomography (MT) is a safe screening modality that can be used for breast cancer detection. The technique uses the dielectric property contrasts between different breast tissues at microwave frequencies to determine the existence of abnormalities. ... Keywords: Breast cancer detection, Cell BE processor, Finite-difference time-domain (FDTD), Microwave tomography (MT)

Meilian Xu; Parimala Thulasiraman; Sima Noghanian

2012-09-01T23:59:59.000Z

312

Using computerized tomography to determine ionospheric structures. Part 1, Notivation and basic approaches  

SciTech Connect

Properties of the ionosphere are reviewed along with its correlations with other geophysical phenomena and with applications of ionospheric studies to communication, navigation, and surveillance systems. Computer tomography is identified as a method to determine the detailed, three-dimensional distribution of electron density within the ionosphere. Several tomography methods are described, with a basic approach illustrated by an example. Limitations are identified.

Vittitoe, C.N.

1993-08-01T23:59:59.000Z

313

Clinical cardiac positron emission tomography: State of the art  

SciTech Connect

Cardiac positron emission tomography (PET) has evolved rapidly from a relatively esoteric research tool into clinical applications providing unique, quantitative information on myocardial perfusion, metabolism, and cell membrane function and having a potentially significant impact on cardiovascular medicine. Although there are many different positron radionuclides for imaging diverse myocardial behavior, three radionuclides have reached accepted clinical utility. Cardiac PET using nitrogen-13-ammonia, rubidium-82, and fluoro-18-deoxyglucose has proved accurate and definitive in multiple university and private-practice sites for diagnosing and assessing severity and location of coronary artery disease in symptomatic or asymptomatic patients, for identifying injured but viable myocardium potentially salvageable by revascularization, and for ruling out clinically significant coronary artery stenosis with a high specificity in patients who might otherwise undergo coronary arteriography to document the absence of significant disease. 89 references.

Gould, K.L. (Division of Cardiology, University of Texas Health Science Center, Houston (United States))

1991-09-01T23:59:59.000Z

314

Functional Substitution Methods in Optimization for Bayesian Tomography  

E-Print Network (OSTI)

1 Bayesian tomographic reconstruction algorithms generally require the efficient optimization of a functional of many variables. In this setting as well as many other optimization tasks, functional substitution (FS) has been widely applied to simplify each step of the iterative process. The function to be minimized is replaced locally by an approximation having a more easily manipulated form, e.g. quadratic, but which maintains sufficient similarity to descend the true functional while computing only the substitute. In this paper, we provide two new applications of FS methods in iterative coordinate descent for Bayesian tomography. The first is a modification of our recently proposed coordinate descent algorithm with 1-D Newton-Raphson approximations to an alternative quadratic which allows convergence to be proven easily. In simulations we find essentially no difference in convergence speed between the two techniques. We also present a new algorithm which exploits the FS method to all...

Jun Zheng; Suhail Saquib; Ken Sauer; Charles Bouman

1997-01-01T23:59:59.000Z

315

Ultrafast three-dimensional x-ray computed tomography  

SciTech Connect

X-ray computed tomography (CT) is a well established visualization technique in medicine and nondestructive testing. However, since CT scanning requires sampling of radiographic projections from different viewing angles, common CT systems with mechanically moving parts are too slow for dynamic imaging, for instance of multiphase flows or live animals. Here, we introduce an ultrafast three-dimensional x-ray CT method based on electron beam scanning, which achieves volume rates of 500 s{sup -1}. Primary experiments revealed the capability of this method to recover the structure of phase boundaries in gas-solid and gas-liquid two-phase flows, which undergo three-dimensional structural changes in the millisecond scale.

Bieberle, Martina; Barthel, Frank; Hampel, Uwe [Institute of Safety Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden (Germany); Menz, Hans-Juergen; Mayer, Hans-Georg [Institute of Nuclear Technology and Energy Systems, University of Stuttgart, 70569 Stuttgart (Germany)

2011-01-17T23:59:59.000Z

316

Electrical resistance tomography from measurements inside a steel cased borehole  

DOE Patents (OSTI)

Electrical resistance tomography (ERT) produced from measurements taken inside a steel cased borehole. A tomographic inversion of electrical resistance measurements made within a steel casing was then made for the purpose of imaging the electrical resistivity distribution in the formation remotely from the borehole. The ERT method involves combining electrical resistance measurements made inside a steel casing of a borehole to determine the electrical resistivity in the formation adjacent to the borehole; and the inversion of electrical resistance measurements made from a borehole not cased with an electrically conducting casing to determine the electrical resistivity distribution remotely from a borehole. It has been demonstrated that by using these combined techniques, highly accurate current injection and voltage measurements, made at appropriate points within the casing, can be tomographically inverted to yield useful information outside the borehole casing.

Daily, William D. (Livermore, CA); Schenkel, Clifford (Walnut Creek, CA); Ramirez, Abelardo L. (Pleasanton, CA)

2000-01-01T23:59:59.000Z

317

Systematics and Biodiversity 2 (4): 375417 Issued 18 April 2005 doi:10.1017/S1477200004001574 Printed in the United Kingdom C The Natural History Museum  

E-Print Network (OSTI)

Printed in the United Kingdom C The Natural History Museum Phylogenetic systematics and historical biogeography of the Neotropical electric fish Gymnotus (Teleostei: Gymnotidae) J. S. Albert1, *, W. G. R Rates of character state evolution 397 Geographic and ecological distributions 400 Discussion 401

Lovejoy, Nathan

318

WEB PUBLISHING APPLICATION FORM: REGISTRATION AS OPENTEXT CMS APPROVER This form should be printed and completed by members of staff of the University who wish to  

E-Print Network (OSTI)

WEB PUBLISHING APPLICATION FORM: REGISTRATION AS OPENTEXT CMS APPROVER This form should be printed and updating web information using OpenText CMS [Content Management System]. An Approver has the ability.e. the navigation or information architecture. If you only need to edit an existing web site and create or edit

Howie, Jim

319

02/06/2006 07:44 PMU.S. Department of Energy Page 1 of 2http://www.doe.gov/print/3161.htm  

E-Print Network (OSTI)

, affordable nuclear energy worldwide WASHINGTON, DC ­ As part of President Bush's Advanced Energy Initiative.S. Department of Energy, Office of Public Affairs, Washington, D.C. #12;02/06/2006 07:44 PMU.S. Department of Energy Page 1 of 2http://www.doe.gov/print/3161.htm News

320

Chemical Geology (Isotope Geoscience Section), 59 (1986) 59--74 59 Elsevier Science Publishers B.V., Amsterdam --Printed in The Netherlands  

E-Print Network (OSTI)

Chemical Geology (Isotope Geoscience Section), 59 (1986) 59--74 59 Elsevier Science Publishers B.V., Amsterdam -- Printed in The Netherlands OXYGEN AND CARBON ISOTOPE FRACTIONATION IN BIOGENIC ARAGONITE: TEMPERATURE EFFECTS ETHAN L. GROSSMAN and TEH-LUNG KU Department of Geology, Texas A &M University, College

Grossman, Ethan L.

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


321

Progres~ in Nuclear Energy. 1985,Vol. 15, pp. 661~69 Printed in Great Britain. 0079~'~530/85$0.011+ .5(  

E-Print Network (OSTI)

of constant intensity. Due to their fine dynamic response, X-rays as generated by dual beam devicesProgres~ in Nuclear Energy. 1985,Vol. 15, pp. 661~69 Printed in Great Britain. 0079 void fraction, void-fluid interfacial velocity and local correlation length. This paper gives a summary

Pázsit, Imre

322

Journal of China University of Geosciences, Vol. 19, No. 5, p. 549566, October 2008 ISSN 1002-0705 Printed in China  

E-Print Network (OSTI)

Journal of China University of Geosciences, Vol. 19, No. 5, p. 549­566, October 2008 ISSN 1002-0705 Printed in China Microbial Mats in the Mesoproterozoic Carbonates of the North China Platform Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083

Jiang, Ganqing

323

A preliminary in vivo study on the potential application of e-tracking in poultry using ink printed 2D barcodes  

Science Conference Proceedings (OSTI)

A preliminary study on the potential application of electronic tracking in poultry in vivo has been conducted. The experimental procedure for this study was based on previous in vitro findings (Froschle et al., 2009) as part of the same research programme. ... Keywords: Abrasion, Beak, Inkjet printing, Poultry identification, Readability

Barry Mc Inerney; Gerard Corkery; Gashaw Ayalew; Shane Ward; Kevin Mc Donnell

2010-08-01T23:59:59.000Z

324

Determination of Internal Target Volume From a Single Positron Emission Tomography/Computed Tomography Scan in Lung Cancer  

SciTech Connect

Purpose: The use of four-dimensional computed tomography (4D-CT) to determine the tumor internal target volume (ITV) is usually characterized by high patient radiation exposure. The objective of this study was to propose and evaluate an approach that relies on a single static positron emission tomography (PET)/CT scan to determine the ITV, thereby eliminating the need for 4D-CT and thus reduce patient radiation dose. Methods and Materials: The proposed approach is based on the concept that the observed PET image is the result of a joint convolution of an ideal PET image (free from motion and partial volume effect) with a motion-blurring kernel (MBK) and partial volume effect. In this regard, the MBK and tumor ITV are then estimated from the deconvolution of this joint model. To test this technique, phantom and patient studies were performed using different sphere/tumor sizes and motion trajectories. In all studies, a 4D-CT and a PET/CT image of the sphere/tumor were acquired. The ITV from the proposed technique was then compared to the maximum intensity projection (MIP) volume of the 4D-CT images. A Dice coefficient of the two volumes was calculated to represent the similarity between the two ITVs. Results: The average ITVs of the proposed technique were 97.2% {+-} 0.3% and 81.0% {+-} 16.7% similar to the MIP volume in the phantom and patient studies, respectively. The average dice coefficients were 0.87 {+-} 0.05 and 0.73 {+-} 0.16, respectively, for the two studies. Conclusion: Using the proposed approach, a single static PET/CT scan has the potential to replace a 4D-CT to determine the tumor ITV. This approach has the added advantage of reducing patient radiation exposure and determining the tumor MBK compared to 4D-CT/MIP-CT.

Chang Guoping; Chang Tingting [Department of Electrical and Computer Engineering, Rice University, Houston, Texas (United States); Pan Tinsu [Department of Imaging Physics, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Clark, John W. [Department of Electrical and Computer Engineering, Rice University, Houston, Texas (United States); Mawlawi, Osama R., E-mail: OMawlawi@mdanderson.org [Department of Imaging Physics, University of Texas MD Anderson Cancer Center, Houston, Texas (United States)

2012-05-01T23:59:59.000Z

325

Non-medical Uses of Computed Tomography (CT) and Nuclear Magnetic Resonance  

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

Non-medical Uses of Computed Tomography (CT) Non-medical Uses of Computed Tomography (CT) and Nuclear Magnetic Resonance (NMR) Resources with Additional Information Computed Tomography (CT) Scanner CT Scanner - Courtesy Stanford University Department of Energy Resources Engineering Computed tomography (CT) and Nuclear Magnetic Resonance (NMR) have been used to resolve industrial problems, for materials characterizations, and to provide non-destructive evaluations for discovering flaws in parts before their use, resulting in greater reliability and greater safety for workers; to identify the presence and facilitate the recovery/extraction of oil, water, coal, and/or gas; and to provide non-destructive testing and quality control of fresh fruits and vegetables, enhancing the safety of food. These benefits of non-medical uses of CT and NMR contribute to the economy and improve people's lives.

326

Peak Tracking by Simultaneous Inversion: Toward a One-Step Acoustic Tomography Analysis  

Science Conference Proceedings (OSTI)

A number of geophysical observing techniques, including ocean acoustic tomography, obtain sequences of records of which the observed relative maxima (peaks) are used to infer properties of the system via inversions. Traditionally, these peaks ...

Uwe Send

1996-10-01T23:59:59.000Z

327

Advances in Optical Coherence Tomography and Microscopy for endoscopic applications and functional neuroimaging  

E-Print Network (OSTI)

Optical Coherence Tomography (OCT) is a developing medical imaging technology that generates micron resolution cross-sectional images of subsurface internal tissue structure in situ and in real time, without the need to ...

Aguirre, Aaron Dominic, 1977-

2008-01-01T23:59:59.000Z

328

Applications of Fourier Domain Mode Locked lasers for optical coherence tomography imaging  

E-Print Network (OSTI)

Optical coherence tomography (OCT) is a micrometer-resolution imaging technique that produces cross-sectional images of sample microstructure by measuring the amplitude and echo time delay of backscattered light. OCT imaging ...

Adler, Desmond Christopher, 1978-

2009-01-01T23:59:59.000Z

329

ARM - Field Campaign - Ground-based Cloud Tomography Experiment at SGP  

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

govCampaignsGround-based Cloud Tomography Experiment at SGP govCampaignsGround-based Cloud Tomography Experiment at SGP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Ground-based Cloud Tomography Experiment at SGP 2009.05.26 - 2009.07.17 Lead Scientist : Dong Huang For data sets, see below. Description Knowledge of 3D cloud properties is pressingly needed in many research fields. One of the problems encountered when trying to represent 3D cloud fields in numerical models is that the existing techniques cannot provide necessary observations at the required spatial scale and resolution. We tested a new promising technique for measuring 3D cloud microphysical structure, called cloud microwave tomography, at the Southern Great Plains (SGP) site for one month in late April 2009. Five microwave scanning

330

Atom Probe Tomography Analysis of Solute Clustering in Al-Mg-Si ...  

Science Conference Proceedings (OSTI)

Contributions of Atom Probe Tomography to the Understanding of Steels Control of p-n ... Relationships in a Series of Co-Cr-Cu-Fe-Ni-Al High Entropy Alloys.

331

One-Step Analysis of Nonlinear Traveltime Data in Ocean Acoustic Tomography  

Science Conference Proceedings (OSTI)

A new approach based on statistical estimation is proposed for the analysis of tomographic traveltime data in cases of significant nonlinear dependence of the traveltimes on the sound-speed variations. Traditional tomography schemes based on ...

E. K. Skarsoulis; U. Send

2000-02-01T23:59:59.000Z

332

A Planetary Wave Analysis Using the Acoustic and Conventional Arrays in the 1981 Ocean Tomography Experiment  

Science Conference Proceedings (OSTI)

Using the maximum likelihood estimation method, quasi-geostrophic wave solutions are fitted to the observations of the 1981 Ocean Acoustic Tomography Experiment. The experiment occupied a 300 km square area centered at 26N, 70W over a duration ...

Ching-Sang Chiu; Yves Desaubies

1987-08-01T23:59:59.000Z

333

NIBART: A New Interval Based Algebraic Reconstruction Technique for Error Quantification of Emission Tomography Images  

Science Conference Proceedings (OSTI)

This article presents a new algebraic method for reconstructing emission tomography images. This approach is mostly an interval extension of the conventional SIRT algorithm. One of the main characteristic of our approach is that the reconstructed activity ...

Olivier Strauss; Abdelkabir Lahrech; Agns Rico; Denis Mariano-Goulart; Benot Telle

2009-10-01T23:59:59.000Z

334

Non-linear inversion modeling for Ultrasound Computer Tomography: transition from soft to hard tissues imaging  

E-Print Network (OSTI)

Non-linear inversion modeling for Ultrasound Computer Tomography: transition from soft to hard, the tomographic procedure used is adapted to broadband data acquired in scattering configurations while, Iterative Approximation, Soft Tissues Imaging, Hard Tissues Imaging, Breast, Bones 1. INTRODUCTION

335

Evolution of upper mantle beneath East Asia and the Tibetan Plateau from P-wave tomography  

E-Print Network (OSTI)

The main objective of the research presented in this thesis is to improve our understanding for the evolution of the upper mantle beneath East Asia and the Tibetan Plateau through high resolution P-wave tomography. The ...

Li, Chang, Ph.D. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

336

Fuel Reliability Program: Assessment of Nuclear Fuel Pellets Using X-Ray Tomography  

Science Conference Proceedings (OSTI)

This EPRI technical report describes a feasibility study involving the application of X-ray tomography as an inspection technique to detect flaws on the surface of uranium pellets in nuclear fuel rods. The objective was to develop and evaluate a system for tomographic imaging of fuel pellets inside fuel rods that uses fast algorithms for analysis of each slice of the reconstructed image for detection of abnormalities in the pellet. The report describes the fundamentals of X-ray tomography and ...

2013-02-22T23:59:59.000Z

337

Imaging atherosclerotic plaque inflammation with [18F]- fluorodeoxyglucose positron emission tomography  

E-Print Network (OSTI)

of tracer CI Confidence interval CO2 Carbon dioxide CRP C-reactive protein CT Computed tomography DPM Decays per minute eNOS Endothelial nitric oxide synthase EDTA Ethylene diamine tetra-acetic acid ETL Echo train... rabbit p Probability PBMC Peripheral blood mononuclear cells PBS Phosphate-buffered saline PDGF Platelet-derived growth factor PDW Proton density-weighted PET Positron emission tomography PK11195 1-(2-chlorophenyl...

Rudd, James H. F.

2003-10-07T23:59:59.000Z

338

Parallelizable Bayesian Tomography Algorithms with Rapid, Guaranteed Convergence  

E-Print Network (OSTI)

Bayesian tomographic reconstruction algorithms generally require the efficient optimization of a functional of many variables. In this setting, as well as in many other optimization tasks, functional substitution (FS) has been widely applied to simplify each step of the iterative process. The function to be minimized is replaced locally by an approximation having a more easily manipulated form, e.g., quadratic, but which maintains sufficient similarity to descend the true functional while computing only the substitute. In this paper, we provide two new applications of FS methods in iterative coordinate descent for Bayesian tomography. The first is a modification of our coordinate descent algorithm with one-dimensional (1-D) Newton--Raphson approximations to an alternative quadratic which allows convergence to be proven easily. In simulations, we find essentially no difference in convergence speed between the two techniques. We also present a new algorithm which exploits the FS method to allow parallel updates of arbitrary sets of pixels using computations similar to iterative coordinate descent. The theoretical potential speed up of parallel implementations is nearly linear with the number of processors if communication costs are neglected.

Jun Zheng; Suhail S. Saquib; Ken Sauer; Charles A. Bouman

2000-01-01T23:59:59.000Z

339

Digital Radiography and Computed Tomography (DRCT) Product Improvement Plan (PIP)  

SciTech Connect

The Idaho National Laboratory (INL) has been developing and deploying x-ray inspection systems for chemical weapons containers for the past 12 years under the direction of the Project Manager for Non-Stockpile Chemical Materiel (PMNSCM). In FY-10 funding was provided to advance the capabilities of these systems through the DRCT (Digital Radiography and Computed Tomography) Product Improvement Plan (PIP), funded by the PMNSCM. The DRCT PIP identified three research tasks; end user study, detector evaluation and DRCT/PINS integration. Work commenced in February, 2010. Due to the late start and the schedule for field inspection of munitions at various sites, it was not possible to spend sufficient field time with operators to develop a complete end user study. We were able to interact with several operators, principally Mr. Mike Rowan who provided substantial useful input through several discussions and development of a set of field notes from the Pueblo, CO field mission. We will be pursuing ongoing interactions with field personnel as opportunities arise in FY-11.

Tim Roney; Bob Pink; Karen Wendt; Robert Seifert; Mike Smith

2010-12-01T23:59:59.000Z

340

Positron Emission Tomography Detector Development for Plant Biology  

Science Conference Proceedings (OSTI)

There are opportunities for the development of new tools to advance plant biology research through the use of radionuclides. Thomas Jefferson National Accelerator Facility, Duke University, West Virginia University and the University of Maryland are collaborating on the development of radionuclide imaging technologies to facilitate plant biology research. Biological research into optimizing plant productivity under various environmental constraints, biofuel and carbon sequestration research are areas that could potentially benefit from new imaging technologies. Using 11CO2 tracers, the investigators at Triangle University Nuclear Laboratory / Duke University Phytotron are currently researching the dynamical responses of plants to environmental changes forecasted from increasing greenhouse trace gases involved in global change. The biological research primary focus is to investigate the impact of elevated atmospheric CO2 and nutrients limitation on carbon and nitrogen dynamics in plants. We report here on preliminary results of 11CO2 plant imaging experiments involving barley plants using Jefferson Lab dual planar positron emission tomography detectors to image 11CO2 in live barley plants. New detector designs will be developed based on the preliminary studies reported here and further planned.

Weisenberger, A G; McKisson, J; Stolin, A; Zorn, C; Howell, C R; Crowell, A S; Reid, C D; Majewski, S

2010-01-01T23:59:59.000Z

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341

Imaging algorithms for geophysical applications of impedance tomography  

SciTech Connect

The methods of impedance tomography may be employed to obtain images of subsurface electrical and conductivity variations. For practical reasons, voltages and currents are usually applied at locations on the ground surface or down a limited number of boreholes, but almost never over the entire surface of the region being investigated. The geophysical inversion process can be facilitated by constructing algorithms adopted to these particular geometries and to the lack of complete surface data. In this paper we assume that the fluctuations in conductivity are small compared to the background value. The imaging of these fluctuations is carried out exactly within the constraints imposed by the problem geometry. Several possible arrangements of injection and monitoring electrodes are considered. In two dimensions include: Cross-line geometry, current input along one line (borehole) and measurements along a separate parallel line. Single-line geometry, injection and monitoring using the same borehole. Surface reflection geometry, all input and measurement along the ground surface. Theoretical and practical limitations on the image quality produced by the algorithms are discussed. They are applied to several sets of simulated data, and the images produced are displayed and analyzed.

Witten, A.J. (Oak Ridge National Lab., TN (United States)); Molyneux, J.E. (Widener Univ., Dept. of Mechanical Engineering, Chester, PA (United States))

1992-06-02T23:59:59.000Z

342

Using electrical resistance tomography to map subsurface temperatures  

DOE Patents (OSTI)

A method is provided for measuring subsurface soil or rock temperatures remotely using electrical resistivity tomography (ERT). Electrical resistivity measurements are made using electrodes implanted in boreholes driven into the soil and/or at the ground surface. The measurements are repeated as some process changes the temperatures of the soil mass/rock mass. Tomographs of electrical resistivity are calculated based on the measurements using Poisson's equation. Changes in the soil/rock resistivity can be related to changes in soil/rock temperatures when: (1) the electrical conductivity of the fluid trapped in the soil's pore space is low, (2) the soil/rock has a high cation exchange capacity and (3) the temperature changes are sufficiently high. When these three conditions exist the resistivity changes observed in the ERT tomographs can be directly attributed to changes in soil/rock temperatures. This method provides a way of mapping temperature changes in subsurface soils remotely. Distances over which the ERT method can be used to monitor changes in soil temperature range from tens to hundreds of meters from the electrode locations.

Ramirez, Abelardo L. (Pleasanton, CA); Chesnut, Dwayne A. (San Francisco, CA); Daily, William D. (Livermore, CA)

1994-01-01T23:59:59.000Z

343

Using electrical resistance tomography to map subsurface temperatures  

DOE Patents (OSTI)

A method is provided for measuring subsurface soil or rock temperatures remotely using electrical resistivity tomography (ERT). Electrical resistivity measurements are made using electrodes implanted in boreholes driven into the soil and/or at the ground surface. The measurements are repeated as some process changes the temperatures of the soil mass/rock mass. Tomographs of electrical resistivity are calculated based on the measurements using Poisson's equation. Changes in the soil/rock resistivity can be related to changes in soil/rock temperatures when: (1) the electrical conductivity of the fluid trapped in the soil's pore space is low, (2) the soil/rock has a high cation exchange capacity and (3) the temperature changes are sufficiently high. When these three conditions exist the resistivity changes observed in the ERT tomographs can be directly attributed to changes in soil/rock temperatures. This method provides a way of mapping temperature changes in subsurface soils remotely. Distances over which the ERT method can be used to monitor changes in soil temperature range from tens to hundreds of meters from the electrode locations. 1 fig.

Ramirez, A.L.; Chesnut, D.A.; Daily, W.D.

1994-09-13T23:59:59.000Z

344

Electrical resistance tomography using steel cased boreholes as electrodes  

DOE Patents (OSTI)

An electrical resistance tomography method is described which uses steel cased boreholes as electrodes. The method enables mapping the electrical resistivity distribution in the subsurface from measurements of electrical potential caused by electrical currents injected into an array of electrodes in the subsurface. By use of current injection and potential measurement electrodes to generate data about the subsurface resistivity distribution, which data is then used in an inverse calculation, a model of the electrical resistivity distribution can be obtained. The inverse model may be constrained by independent data to better define an inverse solution. The method utilizes pairs of electrically conductive (steel) borehole casings as current injection electrodes and as potential measurement electrodes. The greater the number of steel cased boreholes in an array, the greater the amount of data is obtained. The steel cased boreholes may be utilized for either current injection or potential measurement electrodes. The subsurface model produced by this method can be 2 or 3 dimensional in resistivity depending on the detail desired in the calculated resistivity distribution and the amount of data to constrain the models. 2 figs.

Daily, W.D.; Ramirez, A.L.

1999-06-22T23:59:59.000Z

345

Electrical resistance tomography using steel cased boreholes as electrodes  

DOE Patents (OSTI)

An electrical resistance tomography method using steel cased boreholes as electrodes. The method enables mapping the electrical resistivity distribution in the subsurface from measurements of electrical potential caused by electrical currents injected into an array of electrodes in the subsurface. By use of current injection and potential measurement electrodes to generate data about the subsurface resistivity distribution, which data is then used in an inverse calculation, a model of the electrical resistivity distribution can be obtained. The inverse model may be constrained by independent data to better define an inverse solution. The method utilizes pairs of electrically conductive (steel) borehole casings as current injection electrodes and as potential measurement electrodes. The greater the number of steel cased boreholes in an array, the greater the amount of data is obtained. The steel cased boreholes may be utilized for either current injection or potential measurement electrodes. The subsurface model produced by this method can be 2 or 3 dimensional in resistivity depending on the detail desired in the calculated resistivity distribution and the amount of data to constain the models.

Daily, William D. (Livermore, CA); Ramirez, Abelardo L. (Pleasanton, CA)

1999-01-01T23:59:59.000Z

346

A generic, geometric cocalibration method for a combined system of fluorescence molecular tomography and microcomputed tomography with arbitrarily shaped objects  

Science Conference Proceedings (OSTI)

Purpose: A combined system of fluorescence molecular tomography and microcomputed tomography (FMT and mCT) can provide molecular and anatomical information of small animals in a single study with intrinsically coregistered images. The anatomical information provided by the mCT subsystem is commonly used as a reference to locate the fluorophore distribution or as a priori structural information to improve the performance of FMT. Therefore, the transformation between the coordinate systems of the subsystem needs to be determined in advanced. Methods: A cocalibration method for the combined system of FMT and mCT is proposed. First, linear models are adopted to describe the galvano mirrors and the charge-coupled device (CCD) camera in the FMT subsystem. Second, the position and orientation of the galvano mirrors are determined with the input voltages of the galvano mirrors and the markers, whose positions are predetermined. The position, orientation and normalized pixel size of the CCD camera are obtained by analysing the projections of a point-like marker at different positions. Finally, the orientation and position of sources and the corresponding relationship between the detectors and their projections on the image plane are predicted. Because the positions of the markers are acquired with mCT, the registration of the FMT and mCT could be realized by direct image fusion. Results: The accuracy and consistency of this method in the presence of noise is evaluated by computer simulation. Next, a practical implementation for an experimental FMT and mCT system is carried out and validated. The maximum prediction error of the source positions on the surface of a cylindrical phantom is within 0.375 mm and that of the projections of a point-like marker is within 0.629 pixel. Finally, imaging experiments of the fluorophore distribution in a cylindrical phantom and a phantom with a complex shape demonstrate the feasibility of the proposed method. Conclusions: This method is universal in FMT and mCT, which could be performed with no restriction on the system geometry, calibration phantoms or imaging objects.

Fu Jianwei; Yang Xiaoquan; Wang Kan; Luo Qingming; Gong Hui [Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074 (China) and Key Laboratory of Biomedical Photonics of Ministry of Education, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074 (China); Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074 (China); Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074 (China) and Key Laboratory of Biomedical Photonics of Ministry of Education, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074 (China)

2011-12-15T23:59:59.000Z

347

Pretreatment Staging Positron Emission Tomography/Computed Tomography in Patients With Inflammatory Breast Cancer Influences Radiation Treatment Field Designs  

SciTech Connect

Purpose: Positron emission tomography/computed tomography (PET/CT) is increasingly being utilized for staging of inflammatory breast cancer (IBC). The purpose of this study was to define how pretreatment PET/CT studies affected postmastectomy radiation treatment (PMRT) planning decisions for IBC. Methods and Materials: We performed a retrospective analysis of 62 patients diagnosed with IBC between 2004 and 2009, who were treated with PMRT in our institution and who had a staging PET/CT within 3 months of diagnosis. Patients received a baseline physical examination, staging mammography, ultrasonographic examination of breast and draining lymphatics, and chest radiography; most patients also had a bone scan (55 patients), liver imaging (52 patients), breast MRI (46 patients), and chest CT (25 patients). We compared how PET/CT findings affected PMRT, assuming that standard PMRT would target the chest wall, level III axilla, supraclavicular fossa, and internal mammary chain (IMC). Any modification of target volumes, field borders, or dose prescriptions was considered a change. Results: PET/CT detected new areas of disease in 27 of the 62 patients (44%). The areas of additional disease included the breast (1 patient), ipsilateral axilla (1 patient), ipsilateral supraclavicular (4 patients), ipsilateral infraclavicular (1 patient), ipsilateral IMC (5 patients), ipsilateral subpectoral (3 patients), mediastinal (8 patients), other distant/contralateral lymph nodes (15 patients), or bone (6 patients). One patient was found to have a non-breast second primary tumor. The findings of the PET/CT led to changes in PMRT in 11 of 62 patients (17.7%). These changes included additional fields in 5 patients, adjustment of fields in 2 patients, and higher doses to the supraclavicular fossa (2 patients) and IMC (5 patients). Conclusions: For patients with newly diagnosed IBC, pretreatment PET/CT provides important information concerning involvement of locoregional lymph nodes, mediastinal lymph nodes, and unsuspected sites of distant metastasis. This information is important in the design of radiotherapy treatment fields and, therefore, we recommend that PET/CT be a component of initial staging for IBC.

Walker, Gary V. [Department of Radiation Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States)] [Department of Radiation Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Niikura, Naoki [Department of Breast and Endocrine Surgery, Tokai University School of Medicine, Kanagawa (Japan)] [Department of Breast and Endocrine Surgery, Tokai University School of Medicine, Kanagawa (Japan); Yang Wei [Department of Diagnostic Radiology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States)] [Department of Diagnostic Radiology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Rohren, Eric [Department of Nuclear Medicine, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States)] [Department of Nuclear Medicine, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Valero, Vicente [Department of Breast Medical Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States)] [Department of Breast Medical Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Woodward, Wendy A. [Department of Radiation Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States)] [Department of Radiation Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Alvarez, Ricardo H. [Department of Breast Medical Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States)] [Department of Breast Medical Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Lucci, Anthony [Department of Surgical Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States)] [Department of Surgical Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Ueno, Naoto T. [Department of Breast Medical Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States)] [Department of Breast Medical Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Buchholz, Thomas A., E-mail: tbuchhol@mdanderson.org [Department of Radiation Oncology, Morgan Welch Inflammatory Breast Cancer Clinic, University of Texas MD Anderson Cancer Center, Houston, Texas (United States)

2012-08-01T23:59:59.000Z

348

Modeling a Printed Circuit Heat Exchanger with RELAP5-3D for the Next Generation Nuclear Plant  

Science Conference Proceedings (OSTI)

The main purpose of this report is to design a printed circuit heat exchanger (PCHE) for the Next Generation Nuclear Plant and carry out Loss of Coolant Accident (LOCA) simulation using RELAP5-3D. Helium was chosen as the coolant in the primary and secondary sides of the heat exchanger. The design of PCHE is critical for the LOCA simulations. For purposes of simplicity, a straight channel configuration was assumed. A parallel intermediate heat exchanger configuration was assumed for the RELAP5 model design. The RELAP5 modeling also required the semicircular channels in the heat exchanger to be mapped to rectangular channels. The initial RELAP5 run outputs steady state conditions which were then compared to the heat exchanger performance theory to ensure accurate design is being simulated. An exponential loss of pressure transient was simulated. This LOCA describes a loss of coolant pressure in the primary side over a 20 second time period. The results for the simulation indicate that heat is initially transferred from the primary loop to the secondary loop, but after the loss of pressure occurs, heat transfers from the secondary loop to the primary loop.

Not Available

2010-12-01T23:59:59.000Z

349

Berkeley Lab News Center » Dancing in the Dark: Berkeley Lab Scientists Shed New Light on Protein-Salt Interactions » Print  

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

/10 3:30 PM /10 3:30 PM Berkeley Lab News Center » Dancing in the Dark: Berkeley Lab Scientists Shed New Light on Protein-Salt Interactions » Print Page 1 of 3 http://newscenter.lbl.gov/feature-stories/2010/08/11/protein-salt-interactions/print/ Simulation of the interaction between triglycine and dissolved sodium sulfite in water shows the long chain-like triglycine molecule (center) interacting directly with sulfite anions (tripods of yellow and red atoms) while also interacting via multiple hydrogen bonds (thin red or blue lines) with the surrounding water molecules (red and white sticks). - Berkeley Lab News Center - http://newscenter.lbl.gov - Dancing in the Dark: Berkeley Lab Scientists Shed New Light on Protein-Salt Interactions Posted By lcyarris On August 11, 2010 @ 12:08 pm In Feature Stories | Comments Disabled

350

Tomography of the Reionization Epoch with Multifrequency CMB Observations  

E-Print Network (OSTI)

We study the constraints that future multifrequency Cosmic Microwave Background (CMB) experiments will be able to set on the metal enrichment history of the Inter Galactic Medium at the epoch of reionisation. We forecast the signal to noise ratio for the detection of the signal introduced in the CMB by resonant scattering off metals at the end of the Dark Ages. We take into account systematics associated to inter-channel calibration, PSF reconstruction errors and innacurate foreground removal. We develop an algorithm to optimally extract the signal generated by metals during reionisation and to remove accurately the contamination due to the thermal Sunyaev-Zel'dovich effect. Although demanding levels of foreground characterisation and control of systematics are required, they are very distinct from those encountered in HI-21cm studies and CMB polarization, and this fact encourages the study of resonant scattering off metals as an alternative way of conducting tomography of the reionisation epoch. An ACT-like experiment with optimistic assumtions on systematic effects, and looking at clean regions of the sky, can detect changes of 3%-12% (95% c.l.) of the OIII abundance (with respect its solar value) in the redshift range $z\\in$ [12,22], for reionization redshift $z_{\\rm re}>10$. However, for $z_{\\rm re} solar value in the redshift range $z\\in$ [5.5,9], (95% c.l.). These constraints assume that inter-channel calibration is accurate down to one part in $10^{4}$, which constitutes the most critical technical requirement of this method, but still achievable with current technology.

Carlos Hernandez-Monteagudo; Licia Verde; Raul Jimenez

2006-04-14T23:59:59.000Z

351

In vivo breast sound-speed imaging with ultrasound tomography  

Science Conference Proceedings (OSTI)

We discuss a bent-ray ultrasound tomography algorithm with total-variation (TV) regularization. We have applied this algorithm to 61 in vivo breast datasets collected with our in-house clinical prototype for imaging sound-speed distributions in the breast. Our analysis showed that TV regularization could preserve sharper lesion edges than the classic Tikhonov regularization. Furthermore, the image quality of our TV bent-ray sound-speed tomograms was superior to that of the straight-ray counterparts for all types of breasts within BI-RADS density categories 1-4. For all four breast types from fatty to dense, the improvements for average sharpness (in the unit of (m{center_dot} s) {sup -1}) of lesion edges in our TV bent-ray tomograms are between 2.1 to 3.4 fold compared to the straight ray tomograms. Reconstructed sound-speed tomograms illustrated that our algorithm could successfully image fatty and glandular tissues within the breast. We calculated the mean sound-speed values for fatty tissue and breast parenchyma as 1422 {+-} 9 mls (mean{+-} SD) and1487 {+-} 21 mls, respectively. Based on 32 lesions in a cohort of 61 patients, we also found that the mean sound-speed for malignant breast lesions (1548{+-}17 mls) was higher, on average, than that of benign ones (1513{+-}27 mls) (one-sided p

Huang, Lianjie [Los Alamos National Laboratory; Li, Cuiping [KARMANOS CANCER INSTITUTE; Duric, Neb [KARMANOS CANCER INSTITUTE; Littrup, Peter [KARMONOS CANCER INSTITUTE

2009-01-01T23:59:59.000Z

352

THE ATTENUATED RADON TRANSFORM: APPLICATION TO SINGLE-PHOTON EMISSION COMPUTED TOMOGRAPHY IN THE PRESENCE OF A VARIABLE ATTENUATING MEDIUM  

E-Print Network (OSTI)

section imaging of radionuclide distributions in heart,the myocardium ivith radionuclides, Radiology, 125 (1977),attenuation correction in radionuclide computed tomography,

Gullberg, Grant T.

2013-01-01T23:59:59.000Z

353

Boston.com / News / Local / New fuel cell uses germs to generate electricity Page 1 THIS STORY HAS BEEN FORMATTED FOR EASY PRINTING  

E-Print Network (OSTI)

Boston.com / News / Local / New fuel cell uses germs to generate electricity Page 1 THIS STORY HAS BEEN FORMATTED FOR EASY PRINTING New fuel cell uses germs to generate electricity By Gareth Cook, Globe://www.boston.com/news/local/articles/2003/09/08/new_fuel_cell_uses_germs_to_generate_electricity?mode=9:15:28 AM 9/8/2003 #12;Boston

Lovley, Derek

354

Scientific American: Rapid Victories Against Extreme Poverty http://www.sciam.com/print_version.cfm?articleID=5B978D32-E7F2-... 1 of 2 4/24/2007 11:39 AM  

E-Print Network (OSTI)

://www.sciam.com/print_version.cfm?articleID=5B978D32-E7F2-... 2 of 2 4/24/2007 11:39 AM The Millennium Villages Project, a public-private

355

Positron Emission Tomography/Computed Tomography-Guided Intensity-Modulated Radiotherapy for Limited-Stage Small-Cell Lung Cancer  

Science Conference Proceedings (OSTI)

Purpose: Omitting elective nodal irradiation from planning target volumes does not compromise outcomes in patients with non-small-cell lung cancer, but whether the same is true for those with limited-stage small-cell lung cancer (LS-SCLC) is unknown. Therefore, in the present study, we sought to determine the clinical outcomes and the frequency of elective nodal failure in patients with LS-SCLC staged using positron emission tomography/computed tomography and treated with involved-field intensity-modulated radiotherapy. Methods and Materials: Between 2005 and 2008, 60 patients with LS-SCLC at our institution underwent disease staging using positron emission tomography/computed tomography before treatment using an intensity-modulated radiotherapy plan in which elective nodal irradiation was intentionally omitted from the planning target volume (mode and median dose, 45 Gy in 30 fractions; range, 40.5 Gy in 27 fractions to 63.8 Gy in 35 fractions). In most cases, concurrent platinum-based chemotherapy was administered. We retrospectively reviewed the clinical outcomes to determine the overall survival, relapse-free survival, and failure patterns. Elective nodal failure was defined as recurrence in initially uninvolved hilar, mediastinal, or supraclavicular nodes. Survival was assessed using the Kaplan-Meier method. Results: The median age of the study patients at diagnosis was 63 years (range, 39-86). The median follow-up duration was 21 months (range, 4-58) in all patients and 26 months (range, 4-58) in the survivors. The 2-year actuarial overall survival and relapse-free survival rate were 58% and 43%, respectively. Of the 30 patients with recurrence, 23 had metastatic disease and 7 had locoregional failure. We observed only one isolated elective nodal failure. Conclusions: To our knowledge, this is the first study to examine the outcomes in patients with LS-SCLC staged with positron emission tomography/computed tomography and treated with definitive intensity-modulated radiotherapy. In these patients, elective nodal irradiation can be safely omitted from the planning target volume for the purposes of dose escalation and toxicity reduction.

Shirvani, Shervin M.; Komaki, Ritsuko [Department of Radiation Oncology, University of Texas M.D. Anderson Cancer Center, Houston, TX (United States); Heymach, John V.; Fossella, Frank V. [Department of Thoracic/Head and Neck Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, TX (United States); Chang, Joe Y., E-mail: jychang@mdanderson.org [Department of Radiation Oncology, University of Texas M.D. Anderson Cancer Center, Houston, TX (United States)

2012-01-01T23:59:59.000Z

356

Scientists seeking to capture the power of the sun could soon stumble over one of humankind's earliest quarries -the wild boar -as they hunt for a  

E-Print Network (OSTI)

or three times a year to keep the animals' numbers in check, and some residents still decorate the outsides company in Marseille but frequently helps her brother at his restaurant, the Palais de la Bière countries like Russia afford to move in. Odette Navarro, 61, expects a flood of new customers at the Bar de

357

Time-dependent seismic tomography and its application to the Coso  

Open Energy Info (EERE)

and its application to the Coso and its application to the Coso geothermal area, 1996-2006 Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Time-dependent seismic tomography and its application to the Coso geothermal area, 1996-2006 Details Activities (1) Areas (1) Regions (0) Abstract: Measurements of temporal changes in Earth structure are commonly determined using local earthquake tomography computer programs that invert multiple seismic-wave arrival time data sets separately and assume that any differences in the structural results arise from real temporal variations. This assumption is dangerous because the results of repeated tomography experiments would differ even if the structure did not change, simply because of variation in the seismic ray distribution caused by the natural

358

Time-Dependent Seismic Tomography of the Coso Geothermal Area, 1996-2004 |  

Open Energy Info (EERE)

Dependent Seismic Tomography of the Coso Geothermal Area, 1996-2004 Dependent Seismic Tomography of the Coso Geothermal Area, 1996-2004 Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Time-dependent seismic tomography of the Coso geothermal area, 1996-2004 Details Activities (1) Areas (1) Regions (0) Abstract: Local-earthquake tomographic images were calculated for each of the years 1996 - 2004 using arrival times from the U.S. Navy's permanent seismometer network at the Coso geothermal area, California. The results show irregular strengthening with time of the wave-speed ratio VP/VS at shallow depths. These changes result predominately from progressive relative increase in VS with respect to VP, and could result from processes associated with geothermal operations such as decrease in fluid pressure

359

Non-medical Uses of Computed Tomography (CT) and Nuclear Magnetic Resonance  

Office of Scientific and Technical Information (OSTI)

Non-medical Uses of Computed Tomography (CT) and Nuclear Magnetic Resonance (NMR) Resources with Additional Information Computed Tomography (CT) Scanner CT Scanner - Courtesy Stanford University Department of Energy Resources Engineering Computed tomography (CT) and Nuclear Magnetic Resonance (NMR) have been used to resolve industrial problems, for materials characterizations, and to provide non-destructive evaluations for discovering flaws in parts before their use, resulting in greater reliability and greater safety for workers; to identify the presence and facilitate the recovery/extraction of oil, water, coal, and/or gas; and to provide non-destructive testing and quality control of fresh fruits and vegetables, enhancing the safety of food. These benefits of non-medical uses of CT and NMR contribute to the economy and improve people's lives.

360

Fast synchrotron X-ray tomography study of the rod packing structures  

SciTech Connect

We present a fast synchrotron X-ray tomography study of the packing structures of rods under tapping. Utilizing the high flux of the X-rays generated from the third-generation synchrotron source, we can complete a tomography scan within several seconds, after which the three-dimensional (3D) packing structure can be obtained for the subsequent structural analysis. Due to the high-energy nature of the X-ray beam, special image processing steps including image phase-retrieval has been implemented. Overall, this study suggests the possibility of acquiring statistically significant static packing structures within a reasonable time scale using high-intensity X-ray sources.

Zhang Xiaodan; Xia Chengjie; Sun Haohua; Wang Yujie [Department of Physics, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240 (China)

2013-06-18T23:59:59.000Z

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


361

Simulation Study on the Characteristics of Carbon-Fiber-Reinforced Plastics in Electromagnetic Tomography Nondestructive Evaluation Systems  

Science Conference Proceedings (OSTI)

Simulations of carbon-fiber-reinforced plastics (CFRP) using the finite element method in electromagnetic tomography nondestructive evaluation systems are presented in this paper. Ansoft Maxwell 3D models describing the interaction of the sensors with ... Keywords: Carbon-fiber-reinforced plastics (CFRP), finite element, electromagnetic tomography (EMT), nondestructive evaluation (NDE), sensitivity matrix

Ze Liu; Yu Xu; Xiaofei Zhang; Yali Pei; Yiping Cheng; Wuliang Yin

2010-03-01T23:59:59.000Z

362

Print - Industrial Partnerships Office  

... there is an increased need for new engine technologies which can increase fuel efficiency and meet strict pollution standards. Description ...

363

Print - Industrial Partnerships Office  

Technology & Market Discovery. ... The analysis and maps produced by the NeMS tool provides an iterative ... Harvesting electrical energy from ...

364

Gasification Technologies_PRINT  

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

electricity generation and production of chemicals and clean liquid fuels. In a time of electricity and fuel-price spikes, flexible gasification systems provide for operation on...

365

Print - Industrial Partnerships Office  

However, once a laser system is designed this way, catastrophic damage can occur to the laser system if even a single pulse is generated without sufficient bandwidth.

366

Printed on Recycled Paper  

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

Site, Colorado; Idaho National Engineering and Environmental Laboratory, Idaho; Savannah River Site, South Carolina; Los Alamos National Laboratory, New Mexico; Hanford Site,...

367

Print - Industrial Partnerships Office  

'Miniapps' Bolster High Performance Computing. LLNL - David Richards. 2012. Plastic Scintillators for Neutron and Gamma Discrimination.

368

Implementing Print Management  

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

Gaseous Diffusion Plant September 20, 2012 While monitoring progress of our sustainability efforts WEMS noticed that the use and costs for paper, toner and support appeared...

369

Printed on Recycled Paper  

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

of remote-handled (RH) transuranic (TRU) radioactive waste at the Waste Isolation Pilot Plant (WIPP). The shipment, which originated at Idaho National Laboratory (INL),...

370

Printed inorganic transistors  

E-Print Network (OSTI)

Forty years of exponential growth of semiconductor technology have been predicated on the miniaturization of the transistors that comprise integrated circuits. While complexity has greatly increased within a given area of ...

Ridley, Brent (Brent Alan), 1974-

2003-01-01T23:59:59.000Z

371

Adaptive-window indicator kriging: A thresholding method for computed tomography images of porous media  

Science Conference Proceedings (OSTI)

Image segmentation is a crucial step in understanding the structure of porous materials, subsequent analyses being profoundly dependent upon segmentation accuracy. Computed tomography images of naturally occurring heterogeneous materials such as soils ... Keywords: Indicator kriging, Local segmentation, Microtomography, Soil, X-ray

A. N. Houston, W. Otten, P. C. Baveye, S. Hapca

2013-04-01T23:59:59.000Z

372

Computed tomography guided localization of clinically occult breast carcinoma-the ''N'' skin guide  

SciTech Connect

Standard computed tomography (CT) can be used for the three-dimensional localization of clinically occult suspicious breast lesions whose exact position cannot be determined by standard mammographic views. A method is described that facilitates accurate preoperative needle localization using CT guidance, once the position of these lesions is defined.

Kopans, D.B.; Meyer, J.E.

1982-10-01T23:59:59.000Z

373

Open electrical impedance tomography file format: towards a first version Pascal Olivier Gaggero1  

E-Print Network (OSTI)

University, Ottawa, Canada pascal.gaggero@bfh.ch Retrieving and analyzing historical electrical impedanceOpen electrical impedance tomography file format: towards a first version Pascal Olivier Gaggero1 acquired at a different frame rate than the EIT data stream The "eit" folder stores XML

Adler, Andy

374

Lung nodule detection in low-dose and thin-slice computed tomography  

Science Conference Proceedings (OSTI)

A computer-aided detection (CAD) system for the identification of small pulmonary nodules in low-dose and thin-slice CT scans has been developed. The automated procedure for selecting the nodule candidates is mainly based on a filter enhancing spherical-shaped ... Keywords: Computer-aided detection (CAD), Image processing, Low-dose computed tomography (LDCT), Thin-slice CT

A. Retico; P. Delogu; M. E. Fantacci; I. Gori; A. Preite Martinez

2008-04-01T23:59:59.000Z

375

Analysis of hydraulic tomography using temporal moments of drawdown recovery data  

E-Print Network (OSTI)

and Tian-Chyi J. Yeh Department of Hydrology and Water Resources, University of Arizona, Tucson, Arizona are discussed subsequently. Citation: Zhu, J., and T.-C. J. Yeh (2006), Analysis of hydraulic tomography using temporal moments of drawdown recovery data, Water Resour. Res., 42, W02403, doi:10.1029/2005WR004309. 1

Daniels, Jeffrey J.

376

GPS tomography in the polar cap: comparison with ionosondes and in situ spacecraft data  

Science Conference Proceedings (OSTI)

Tomographic 4D reconstructions of ionospheric anomalies appearing in the high-latitude polar cap region are compared with plasma density measurements by digital ionosonde located near the north magnetic pole at Eureka station and with in situ plasma ... Keywords: GPS tomography, Geomagnetic storms, Ionosphere

Dimitry Pokhotelov; P. T. Jayachandran; Cathryn N. Mitchell; John W. Macdougall; Michael H. Denton

2011-01-01T23:59:59.000Z

377

Design of a DICOM image-based program for estimating patient exposure dose in computed tomography  

Science Conference Proceedings (OSTI)

During the past decade, there has been a notable worldwide increase in the number of computed tomographic (CT) examinations. Since the radiation exposure to the patient during CT examinations is relatively high, it is important to optimize the dose so ... Keywords: DICOM, computed tomography (CT), effective dose

Shuji Yamamoto; Tetsuya Horiuchi; Junko Sekiguchi; Shigeo Wada; Mitsuru Komizu; Takami Yamaguchi

2007-04-01T23:59:59.000Z

378

Time-lapse electrical resistivity tomography applied to cave sustainability (Barbados) and groundwater exploration (Saint Lucia)  

E-Print Network (OSTI)

In this work we apply the method of two-dimensional time-lapse electrical resistivity tomography (2D time-lapse ERT) for two different problems. In the first problem, we monitor the structural stability of the roof of the ...

Agramakova, Yulia

2011-01-01T23:59:59.000Z

379

Use of historic metabolic biotransformation data as a means of anticipating metabolic sites using MetaPrint2D and Bioclipse  

E-Print Network (OSTI)

are coloured accord- ing to the likelihood of a metabolic site being centred on this atom: High: red, Medium: yellow, Low: green, and Very low is not coloured. In single molecule mode the molecule can be edited and by a click of a button the new prediction... MetaPrint2D calculation on the drug Verapamil using the Standard search mode and the database ALL. Atoms coloured in red indicates a high likelihood of me- tabolism occurring at that site, yellow indicates medium, green low, and no colouring indicates...

Carlsson, Lars; Spjuth, Ola; Adams, Sam; Glen, Robert C; Boyer, Scott

2010-07-01T23:59:59.000Z

380

A Computational Study on the Thermal-Hydraulic Behavior of Supercritical Carbon Dioxide in Various Printed Circuit Heat Exchanger Designs  

E-Print Network (OSTI)

There has been an ever-increasing demand for power generation, which is predicted to grow as society becomes more advanced. However, tradition fossil fuels are beginning to deplete, and there is a great necessity for alternative fuel sources that will bridge the gap between energy production and consumption. To decrease the high demand alternative fuel sources are gaining in popularity. The supercritical carbon dioxide Brayton power cycle has been proposed as a possible cycle for nuclear and concentrated solar power generation. Two main advantages of having supercritical carbon dioxide are the large property variations and component size associated with power cycle. Forced convection heat transfer of supercritical carbon dioxide in printed circuit heat exchanger geometries were investigated in the following study using a finite volume framework and the FLUENT 12.1 code. The geometries of interest were: non- chamfered zig-zag, chamfered zig-zag, and air foil. Flow through the three geometries was in the horizontal orientation and subject to a heating mode operation. A range of testing conditions were explored, including operating pressures between 7.5 to 10.2 MPa with the mass flux ranging from 326 to 762 kg/m2-s. Due to the turbulent nature of this problem, the k?E with enhanced wall treatment and shear stress transport k?? turbulence models were considered. With this addition a total of 54 simulations were performed. Results indicated that there was an increase in the heat transfer coefficient as the supercritical carbon dioxide reached the pseudocritical temperature, conversely as there was an increase in operating pressure, the heat transfer coefficient decreased. Nevertheless, this increase near the pseudocritical temperature was due to a sharp increase in the specific heat. Mass flux effects indicated that there was an increase in heat transfer as the mass flux was increased. This was due to the increase in Reynolds number near the pseudocritical temperature. Next, pressure losses were investigated for the three geometries. The non-chamfered zig-zag channel had the greatest pressure loss associated with it, while the air foil channel had the least. Based on the results, the ratio of the friction factor to heat transfer for the non-chamfered and chamfered zig-zag geometries were approximately 2.65 and 1.57 times higher than for the air foil, thus leading to the idea that the air foil channel may be best suited for practical applications. Finally, the simulation results were compared to experimental data and existing correlations. Many existing correlations failed to accurately predict the magnitude of heat transfer, although they exhibited a similar trend. A new correlation was developed for the zig-zag geometries based on the numerical data obtained during this investigation and published experimental data. The new correlation is able to predict the maximum heat transfer coefficient within 12.4%.

Matsuo, Bryce

2013-05-01T23:59:59.000Z

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


381

Derivation of site-specific relationships between hydraulic parameters and p-wave velocities based on hydraulic and seismic tomography  

E-Print Network (OSTI)

method, Water Resources Research 36 (8), 2095-2105 Yeh, T. -determine the water saturation. However, Yeh at al. , 2000Yeh (2005), Characterization of aquifer heterogeneity using transient hydraulic tomography, Water

Brauchler, R.

2012-01-01T23:59:59.000Z

382

Simultaneous maximum-likelihood reconstruction for x-ray grating based phase-contrast tomography avoiding intermediate phase retrieval  

E-Print Network (OSTI)

Phase-wrapping artifacts, statistical image noise and the need for a minimum amount of phase steps per projection limit the practicability of x-ray grating based phase-contrast tomography, when using filtered back projection reconstruction. For conventional x-ray computed tomography, the use of statistical iterative reconstruction algorithms has successfully reduced artifacts and statistical issues. In this work, an iterative reconstruction method for grating based phase-contrast tomography is presented. The method avoids the intermediate retrieval of absorption, differential phase and dark field projections. It directly reconstructs tomographic cross sections from phase stepping projections by the use of a forward projecting imaging model and an appropriate likelihood function. The likelihood function is then maximized with an iterative algorithm. The presented method is tested with tomographic data obtained through a wave field simulation of grating based phase-contrast tomography. The reconstruction result...

Ritter, Andr; Durst, Jrgen; Gdel, Karl; Haas, Wilhelm; Michel, Thilo; Rieger, Jens; Weber, Thomas; Wucherer, Lukas; Anton, Gisela

2013-01-01T23:59:59.000Z

383

Preprocessing of backprojection images in the McClellan Nuclear Radiation Center tomography system  

DOE Green Energy (OSTI)

Neutron tomography is being investigated as a nondestructive technique for quantitative assessment of low atomic mass impurity concentration in metals. Neutrons maximize the sensitivity given their higher cross sections for low Z isotopes while tomography provides the three dimensional density information. The specific application is the detection of Hydrogen down to 200 ppm weight in aircraft engine compressor blades. A number of preprocessing corrections have been implemented for the backprojection images in order to achieve the detection requirements for a testing rate of three blades per hour. Among the procedures are corrections for neutron scattering and beam hardening. With these procedures the artifacts in tomographic reconstructions are shown to be less than the signal for 100 ppm hydrogen in titanium alloy samples.

Gibbons, M. R., LLNL

1998-02-19T23:59:59.000Z

384

Quantum process tomography and Linblad estimation of a solid state qubit  

E-Print Network (OSTI)

We present an example of quantum process tomography (QPT) performed on a single solid state qubit. The qubit used is two energy levels of the triplet state in the Nitrogen-Vacancy defect in Diamond. Quantum process tomography is applied to a qubit which has been allowed to decohere for three different time periods. In each case the process is found in terms of the chi matrix representation and the affine map representation. The discrepancy between experimentally estimated process and the closest physically valid process is noted. The results of QPT performed after three different decoherence times are used to find the error generators, or Lindblad operators, for the system, using the technique introduced by Boulant et al. [N. Boulant, T.F. Havel, M.A. Pravia and D.G. Cory, Phys. Rev. A 67, 042322 (2003)].

M. Howard; J. Twamley; C. Wittmann; T. Gaebel; F. Jelezko; J. Wrachtrup

2006-01-25T23:59:59.000Z

385

Neutron Computed Tomography of Freeze/thaw Phenomena in Polymer Electrolyte Fuel Cells  

DOE Green Energy (OSTI)

This report summarizes the final year's progress of the three-year NEER program. The overall objectives of this program were to 1) design and construct a sophisticated hight-resolution neutron computed tomography (NCT) facility, 2) develop novel and sophisticated liquid water and ice quantification analysis software for computed tomography, and 3) apply the advanced software and NCT capability to study liquid and ice distribution in polymer electrolyte fuel cells (PEFCs) under cold-start conditions. These objectives have been accomplished by the research team, enabling a new capability for advanced 3D image quantification with neutron imaging for fuel cell and other applications. The NCT water quantification methodology and software will greatly add to the capabilities of the neutron imaging community, and the quantified liquid water and ice distribution provided by its application to PEFCs will enhance understanding and guide design in the fuel cell community.

Matthew M. Mech; Jack Brenizer; Kenan Unlu; A.K. Heller

2008-12-12T23:59:59.000Z

386

Global convergence of diluted iterations in maximum-likelihood quantum tomography  

E-Print Network (OSTI)

In this paper we present an inexact stepsize selection for the Diluted R\\rho R algorithm, used to obtain the maximum likelihood estimate to the density matrix in quantum state tomography. We give a new interpretation for the diluted R\\rho R iterations that allows us to prove the global convergence under weaker assumptions. Thus, we propose a new algorithm which is globally convergent and suitable for practical implementation.

D. S. Gonalves; M. A. Gomes-Ruggiero; C. Lavor

2013-06-13T23:59:59.000Z

387

A simple setup for neutron tomography at the Portuguese Nuclear Research Reactor  

E-Print Network (OSTI)

A simple setup for neutron radiography and tomography was recently installed at the Portuguese Research Reactor. The objective of this work was to determine the operational characteristics of the installed setup, namely the irradiation time to obtain the best dynamic range for individual images and the spatial resolution. The performance of the equipment was demonstrated by imaging a fragment of a 17th century decorative tile.

M. A. Stanojev Pereira; J. G. Marques; R. Pugliesi

2012-05-15T23:59:59.000Z

388

Simulation and preliminary performance characteristics of a computed tomography device for industrial applications  

SciTech Connect

A computed tomography system designed to function in an industrial environment is being constructed. The modular design maintains the flexibility necessary in an environment where source strength and energy, as well as detector type, could change with each application. The static nature of industrial objects also allow economies of design not possible where dynamic objects are to be analyzed. Simulation of the device has been completed and expected image qualities obtained.

Kruger, R.P.; Cannon, T.M.; Lundy, A.S.; Morris, R.A.

1978-01-01T23:59:59.000Z

389

Detection and Imaging of High-Z Materials with a Muon Tomography Station Using GEM Detectors  

E-Print Network (OSTI)

Muon tomography based on the measurement of multiple scattering of atmospheric cosmic ray muons is a promising technique for detecting and imaging heavily shielded high-Z nuclear materials such as enriched uranium. This technique could complement standard radiation detection portals currently deployed at international borders and ports, which are not very sensitive to heavily shielded nuclear materials. We image small targets in 3D using $2\\times 2 \\times 2$ mm^3 voxels with a minimal muon tomography station prototype that tracks muons with Gas Electron Multiplier (GEM) detectors read out in 2D with x-y microstrips of 400 micron pitch. With preliminary electronics, the GEM detectors achieve a spatial resolution of 130 microns in both dimensions. With the next GEM-based prototype station we plan to probe an active volume of ~27 liters. We present first results on reading out all 1536 microstrips of a $30 \\times 30$ cm^2 GEM detector for the next muon tomography prototype with final frontend electronics and DAQ...

Gnanvo, K; Bittner, W; Costa, F; Grasso, L; Hohlmann, M; Locke, J B; Martoiu, S; Muller, H; Staib, M; Tarazona, A; Toledo, J

2010-01-01T23:59:59.000Z

390

Robust inverse scattering full waveform seismic tomography for imaging complex structure  

SciTech Connect

Seismic tomography becomes important tool recently for imaging complex subsurface. It is well known that imaging complex rich fault zone is difficult. In this paper, The application of time domain inverse scattering wave tomography to image the complex fault zone would be shown on this paper, especially an efficient time domain inverse scattering tomography and their run in cluster parallel computer which has been developed. This algorithm is purely based on scattering theory through solving Lippmann Schwienger integral by using Born's approximation. In this paper, it is shown the robustness of this algorithm especially in avoiding the inversion trapped in local minimum to reach global minimum. A large data are solved by windowing and blocking technique of memory as well as computation. Parameter of windowing computation is based on shot gather's aperture. This windowing technique reduces memory as well as computation significantly. This parallel algorithm is done by means cluster system of 120 processors from 20 nodes of AMD Phenom II. Benchmarking of this algorithm is done by means Marmoussi model which can be representative of complex rich fault area. It is shown that the proposed method can image clearly the rich fault and complex zone in Marmoussi model even though the initial model is quite far from the true model. Therefore, this method can be as one of solution to image the very complex mode.

Nurhandoko, Bagus Endar B.; Sukmana, Indriani; Wibowo, Satryo; Deny, Agus; Kurniadi, Rizal; Widowati, Sri; Mubarok, Syahrul; Susilowati; Kaswandhi [Wave Inversion and Subsurface Fluid Imaging Research (WISFIR) Lab., Complex System Research Division, Physics Department, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung. and Rock Fluid Imaging Lab., Rock Physics and Cluster C (Indonesia); Rock Fluid Imaging Lab., Rock Physics and Cluster Computing Center, Bandung (Indonesia); Physics Department of Institut Teknologi Bandung (Indonesia); Rock Fluid Imaging Lab., Rock Physics and Cluster Computing Center, Bandung, Indonesia and Institut Teknologi Telkom, Bandung (Indonesia); Rock Fluid Imaging Lab., Rock Physics and Cluster Computing Center, Bandung (Indonesia)

2012-06-20T23:59:59.000Z

391

G:\\sas\\divshar\\Curriculum Sheets\\PCE\\2007-2008 PCE Curriculum\\Origninals\\Paper Science 2007-2008.doc Last printed 5/24/2007 9:28:00 AM PAPER SCIENCE & ENGINEERING  

E-Print Network (OSTI)

-2008.doc Last printed 5/24/2007 9:28:00 AM PCE 415/515 (3) CHEMICAL KINETICS & REACTOR DESIGN Chemical engineering with a special focus on chemical engineering applications. In particular, this course will focus of the Paper & Chemical Engineering Department is to teach and prepare liberally educated, articulate

Dollar, Anna

392

Solar-Powered Robot Swarm Could Clean Oil : Discovery News http://news.discovery.com/tech/solar-powered-ocean-robots-clean-oil.html?print=true[8/30/2010 8:28:06 AM  

E-Print Network (OSTI)

Solar-Powered Robot Swarm Could Clean Oil : Discovery News http://news.discovery.com/tech/solar-powered-ocean-robots-clean-oil.html?print=true[8/30/2010 8:28:06 AM] Solar-Powered Robot Swarm Could Clean Oil Oil-absorbing nanomaterial a new solar-powered robot prototype equipped with nanotechnology designed by researchers at MIT

Rock, Chris

393

04/25/06Office of the Governor of the State of California Page 1 of 2http://www.gov.ca.gov/index.php?/print-version/executive-order/183/  

E-Print Network (OSTI)

and energy needs; and WHEREAS, ethanol is a renewable transportation biofuel that California consumes more of the future; and WHEREAS, biofuels can be a clean, renewable source for hydrogen; and WHEREAS, biofuels offer.gov.ca.gov/index.php?/print-version/executive-order/183/ 1. The following targets to increase the production and use of bioenergy, including ethanol

394

Print Story: Japan has told EU it is giving up on nuclear reactor bid:... http://news.yahoo.com/s/afp/20050622/wl_asia_afp/japaneufrancenuc... 1 of 1 6/22/05 12:12 AM  

E-Print Network (OSTI)

Print Story: Japan has told EU it is giving up on nuclear reactor bid:... http it is giving up on nuclear reactor bid: report 1 hour, 51 minutes ago Japan has told the European Union it will give up on hosting a revolutionary nuclear energy reactor after securing large deals in turn

395

ABC News: EU Threatens to Go It Alone on Nuclear Fusion http://abcnews.go.com/US/print?id=237927 1 of 2 11/9/04 8:33 AM  

E-Print Network (OSTI)

Union warned on Tuesday it may go ahead and build the world's first nuclear fusion reactor with whatever's nuclear reactors and weapons, which produce energy by blowing atoms apart. However, 50 years of researchABC News: EU Threatens to Go It Alone on Nuclear Fusion http://abcnews.go.com/US/print?id=237927 1

396

Journal of the Geological Society, London, Vol. 161, 2004, pp. 133145. Printed in Great Britain. Fossil-wood carbon-isotope stratigraphy of the non-marine Wealden Group  

E-Print Network (OSTI)

Journal of the Geological Society, London, Vol. 161, 2004, pp. 133­145. Printed in Great Britain. 133 Fossil-wood carbon-isotope stratigraphy of the non-marine Wealden Group (Lower Cretaceous-wood carbon-isotope data are presented for the Wessex Formation, a non-marine unit within the Lower Cretaceous

Hesselbo, Stephen P.

397

12/24/2006 02:23 PMLoading "Oil Addiction Weakens the U.S. -Issues 2007 -MSNBC.com" Page 1 of 2http://www.msnbc.msn.com/id/16299314/site/newsweek/print/1/displaymode/1098/  

E-Print Network (OSTI)

12/24/2006 02:23 PMLoading "Oil Addiction Weakens the U.S. - Issues 2007 - MSNBC.com" Page 1 of 2http://www.msnbc.msn.com/id/16299314/site/newsweek/print/1/displaymode/1098/ MSNBC.com Oil Addiction decades, energy has become a central problem in foreign policy. The surge in oil prices--and in oil

Deutch, John

398

Progress in Nuclear Energy. 1982, Vol. 9, pp. 223-232 007%6530/82/03223-1055.00/0 Printed in Great Britain. All rights reserved. Copyright 1982 Pergamon Press Ltd  

E-Print Network (OSTI)

BASED ON RESEARCH REACTORS: THEORY AND EXPERIMENT I. PAZSIT and I. Lux Central Research InstituteProgress in Nuclear Energy. 1982, Vol. 9, pp. 223-232 007%6530/82/03223-1055.00/0 Printed in Great for Physics, H-1525 Budapest 114, P. O. Box 49, Hungary ABSTRACT A concept for research reactor based noise

Pázsit, Imre

399

New Cyclotron Targetry to Enhance F-18 clinical Position Emission Tomography  

SciTech Connect

This project proposes to develop cyclotron targets that produce F-18 for clinical Positron Emission Tomography (PET) at significantly higher rates than that available from current targetry. This production rate of 18F is directly proportional to the beam current. Higher beam currents would result in increased 18F production but would be accompanied by higher heat loads to the target. The beam power available in most commercial cyclotrons exceeds the heat removal capacity of current target technology by a factor of two to four, significantly limiting the production rate of Fluorine-18.

J. Michael Doster

2008-12-19T23:59:59.000Z

400

Minimum tomography of two entangled qutrits using local measurements of one-qutrit SIC-POVM  

E-Print Network (OSTI)

An experimental demonstration of two-qutrit state tomography via one-qutrit symmetric informationally complete positive operator-valued measure (SIC-POVM) is presented. A two-qutrit state is encoded in the transversal paths of a spontaneous parametric down-converted photon pair. A spatial light modulator allows to implement the necessary 81 POVM elements to reconstruct the state. The quality of the reconstruction is evaluated by comparing independent measurements with the predicted results calculated with the reconstructed state. Entanglement in the system is calculated via negativity and generalized robustness from the two-qutrit reconstructed density operator.

W. M. Pimenta; B. Marques; T. O. Maciel; R. O. Vianna; A. Delgado; C. Saavedra; S. Pdua

2013-12-04T23:59:59.000Z

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


401

Detection of foreign body using fast thermoacoustic tomography with a multielement linear transducer array  

SciTech Connect

Current imaging modalities face challenges in clinical applications due to limitations in resolution or contrast. Microwave-induced thermoacoustic imaging may provide a complementary modality for medical imaging, particularly for detecting foreign objects due to their different absorption of electromagnetic radiation at specific frequencies. A thermoacoustic tomography system with a multielement linear transducer array was developed and used to detect foreign objects in tissue. Radiography and thermoacoustic images of objects with different electromagnetic properties, including glass, sand, and iron, were compared. The authors' results demonstrate that thermoacoustic imaging has the potential to become a fast method for surgical localization of occult foreign objects.

Nie Liming; Xing Da; Yang Diwu; Zeng Lvming; Zhou Quan [MOE Key Laboratory of Laser Life Science, South China Normal University, Guangzhou 510631 (China) and Institute of Laser Life Science, South China Normal University, Guangzhou 510631 (China)

2007-04-23T23:59:59.000Z

402

Tomography of a High-Purity Narrowband Photon From a Transient Atomic Collective Excitation  

E-Print Network (OSTI)

We demonstrate the efficient heralded generation of high purity narrow-bandwidth single photons from a transient collective spin excitation in a hot atomic vapour cell. Employing optical homodyne tomography, we fully reconstruct the density matrix of the generated photon and observe a Wigner function reaching the zero value without correcting for any inefficiencies. The narrow bandwidth of the photon produced is accompanied by a high generation rate yielding a high spectral brightness. The source is therefore compatible with atomic-based quantum memories as well as other applications in light-atom interfacing. This work paves the way to preparing and measuring arbitrary superposition states of collective atomic excitations.

MacRae, A; Lvovsky, A I

2011-01-01T23:59:59.000Z

403

Three-dimensional visualization of forming Hepatitis C virus-like particles by electron-tomography  

Science Conference Proceedings (OSTI)

Hepatitis C virus infects almost 170 million people per year but its assembly pathway, architecture and the structures of its envelope proteins are poorly understood. Using electron tomography of plastic-embedded sections of insect cells, we have visualized the morphogenesis of recombinant Hepatitis C virus-like particles. Our data provide a three-dimensional sketch of viral assembly at the endoplasmic reticulum showing different budding stages and contiguity of buds. This latter phenomenon could play an important role during the assembly of wt-HCV and explain the size-heterogeneity of its particles.

Badia-Martinez, Daniel; Peralta, Bibiana [Structural Biology Unit, CIC bioGUNE, CIBERehd, 48160 Derio (Spain)] [Structural Biology Unit, CIC bioGUNE, CIBERehd, 48160 Derio (Spain); Andres, German; Guerra, Milagros [Electron Microscopy Unit, Centro de Biologia Molecular Severo Ochoa, CSIC-UAM, Campus Cantoblanco, 28049 Madrid (Spain)] [Electron Microscopy Unit, Centro de Biologia Molecular Severo Ochoa, CSIC-UAM, Campus Cantoblanco, 28049 Madrid (Spain); Gil-Carton, David [Structural Biology Unit, CIC bioGUNE, CIBERehd, 48160 Derio (Spain)] [Structural Biology Unit, CIC bioGUNE, CIBERehd, 48160 Derio (Spain); Abrescia, Nicola G.A., E-mail: nabrescia@cicbiogune.es [Structural Biology Unit, CIC bioGUNE, CIBERehd, 48160 Derio (Spain); IKERBASQUE, Basque Foundation for Science, 48011 Bilbao (Spain)

2012-09-01T23:59:59.000Z

404

Computer-assisted tomography for the observation of oil displacement in porous media  

SciTech Connect

Computer-assisted tomography (CAT) is used to obtain cross-sectional images of Berea sandstone cores during oil displacement experiments. Local oil saturation averaged over an area of about 0.03X0.03 in. (0.8X0.8 mm) square is computed as a function of spatial position and time. A series of CAT scan images displaying the time evolution of the fluid distribution at one cross section are shown to illustrate the formation of viscous fingers.

Wang, S.Y.; Ayral, S.; Gryte, C.C.

1984-02-01T23:59:59.000Z

405

Optimization of neutron tomography for rapid hydrogen concentration inspection of metal castings  

DOE Green Energy (OSTI)

Hydrogen embrittlement describes a group of phenomena leading to the degradation of metal alloy properties. The hydrogen concentration in the alloy can be used as an indicator for the onset of embrittlement. A neutron tomography system has been optimized to perform nondestructive detection of hydrogen concentration in titanium aircraft engine compressor blades. Preprocessing of back projection images and postprocessing of tomographic reconstructions are used to achieve hydrogen concentration sensitivity below 200 ppm weight. This paper emphasizes the postprocessing techniques which allow automated reporting of hydrogen concentration.

Gibbons, M. R., LLNL

1998-02-03T23:59:59.000Z

406

High-resolution retinal imaging using adaptive optics and Fourier-domain optical coherence tomography  

DOE Patents (OSTI)

This invention permits retinal images to be acquired at high speed and with unprecedented resolution in three dimensions (4.times.4.times.6 .mu.m). The instrument achieves high lateral resolution by using adaptive optics to correct optical aberrations of the human eye in real time. High axial resolution and high speed are made possible by the use of Fourier-domain optical coherence tomography. Using this system, we have demonstrated the ability to image microscopic blood vessels and the cone photoreceptor mosaic.

Olivier, Scot S. (Livermore, CA); Werner, John S. (Davis, CA); Zawadzki, Robert J. (Sacramento, CA); Laut, Sophie P. (Pasedena, CA); Jones, Steven M. (Livermore, CA)

2010-09-07T23:59:59.000Z

407

High Quality Image of Biomedical Object by X-ray Refraction Based Contrast Computed Tomography  

SciTech Connect

Recently we have developed a new Computed Tomography (CT) algorithm for refraction contrast that uses the optics of diffraction-enhanced imaging. We applied this new method to visualize soft tissue which is not visualized by the current absorption based contrast. The meaning of the contrast that appears in refraction-contrast X-ray CT images must be clarified from a biologic or anatomic point of view. It has been reported that the contrast is made with the specific gravity map with a range of approximately 10 {mu}arc sec. However, the relationship between the contrast and biologic or anatomic findings has not been investigated, to our knowledge. We compared refraction-contrast X-ray CT images with microscopic X-ray images, and we evaluated refractive indexes of pathologic lesions on phase-contrast X-ray CT images. We focused our attenuation of breast cancer and lung cancer as samples. X-ray refraction based Computed Tomography was appeared to be a pathological ability to depict the boundary between cancer nest and normal tissue, and inner structure of the disease.

Hashimoto, E. [Department of Photon-Science, School of Advanced Studies, Graduate University for Advanced Studies (GUAS), Shonan Village, Hayama, Kanagawa 240-0193 (Japan); Maksimenko, A.; Hirano, K.; Hyodo, K. [Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan); Sugiyama, H. [Department of Photon-Science, School of Advanced Studies, Graduate University for Advanced Studies (GUAS), Shonan Village, Hayama, Kanagawa 240-0193 (Japan); Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan); Shimao, D. [Department of Health Sciences, Ibaraki prefectural University of Health Sciences, 4669-2Ami, Ami, Inashiki, Ibaraki, 300-0394 (Japan); Nishino, Y.; Ishikawa, T. [RIKEN Harima Institute, 1-1-1 Kouto, Mikazuki, Sayo, Hyogo, 679-5148 (Japan); Yuasa, T. [Department of Bio-system Engineering, Faculty of Engineering Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510 (Japan); Ichihara, S. [Dept. of Path., Nagoya Med. Center, Nat. Hospital Organization, Naka-ku, Nagoya 460-0001 (Japan); Arai, Y. [Matsumoto Dental University, 1980 Hirooka, Shiojiri, Nagano (Japan); Ando, M. [Department of Photon-Science, School of Advanced Studies, Graduate University for Advanced Studies (GUAS), Shonan Village, Hayama, Kanagawa 240-0193 (Japan); Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan); Inst. of Sci. and Tech., Tokyo Univ. of Science, Yamasaki 2641, Noda, Chiba 278-8510 (Japan)

2007-01-19T23:59:59.000Z

408

Using seismic tomography to characterize fracture systems induced by hydraulic fracturing  

DOE Green Energy (OSTI)

Microearthquakes induced by hydraulic fracturing have been studied by many investigators to characterize fracture systems created by the fracturing process and to better understand the locations of energy resources in the earth`s subsurface. The pattern of the locations often contains a great deal of information about the fracture system stimulated during the hydraulic fracturing. Seismic tomography has found applications in many areas for characterizing the subsurface of the earth. It is well known that fractures in rock influence both the P and S velocities of the rock. The influence of the fractures is a function of the geometry of the fractures, the apertures and number of fractures, and the presence of fluids in the fractures. In addition, the temporal evolution of the created fracture system can be inferred from the temporal changes in seismic velocity and the pattern of microearthquake locations. Seismic tomography has been used to infer the spatial location of a fracture system in a reservoir that was created by hydraulic fracturing.

Fehler, M.; Rutledge, J.

1995-01-01T23:59:59.000Z

409

Radiation-induced lung injury using a pig model: Evaluation by high-resolution computed tomography  

Science Conference Proceedings (OSTI)

To assess the early phase of radiation-induced lung injury using high-resolution computed tomography (CT) under experimental conditions and to perform precise CT-pathologic correlation. Five Yorkshire pigs received a single dose of 12.5 Gy to the right lower lung. Computed tomographic images were obtained at 2-week intervals. The animals were killed after follow-up periods of 4-16 weeks. The lungs were removed, inflated, fixed, dried, and sliced corresponding to the CT sections. Computed tomography, specimen radiography, and histologic findings were correlated. Various CT findings were observed during the first 16 weeks, including ground-glass opacity, discrete consolidation, patchy consolidation, thickened interlobular septum, and bronchovascular bundle. Ground-glass opacity was associated with thickened alveolar wall and scattered tiny fibrotic foci. Thickened interlobular septum and bronchovascular bundle were the results of fibrosis adjacent to these structures. Discrete consolidation correlated with intraalveolar edema with hemorrhage and infiltration of inflammatory cells. High-resolution CT correlated well with pathology of the lung due to radiation injury as verified by precise radiologic-pathologic correlation. 28 refs., 4 figs., 1 tab.

Takahashi, Masashi; Balazs, G.; Moskowitz, G.W.; Palestro, C.J.; Eacobacci, T.; Khan, A.; Herman, P.G. [Albert Einstein College of Medicine, New Hyde Park, NY (United States)

1995-02-01T23:59:59.000Z

410

Three-dimensional characterization of near-field transducers by electron tomography  

SciTech Connect

Transmission electron microscopy (TEM) was employed to study the structure of near-field transducers (NFT) for applications in heat-assisted magnetic recording (HAMR) heads. The overall shape of NFTs that had passed or failed an optical test was similar, as determined by scanning transmission electron microscopy tomography. However, the absence of a well-defined peg and the presence of a flat top on the 'FAIL' NFT disk induced poor thermal heat transfer from the NFT to the phase change medium and resulted in the optical test failure. The thermal heating around the NFT led to Ta diffusion from the adjacent tantala core and to the presence of Ta-rich particles in the alumina matrix in the plane of the NFT. - Highlights: Black-Right-Pointing-Pointer Very site specific TEM specimen prepared by dual-beam SEM/FIB system. Black-Right-Pointing-Pointer Near field transducer characterization by STEM tomography. Black-Right-Pointing-Pointer Elemental analysis in 2D by STEM-EDX.

Liu, Yuzi, E-mail: yuziliu@anl.gov [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States) [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States); Center for Nanoscale Materials, Argonne National Laboratory, Argonne IL, 60439 (United States); Schreiber, Daniel K. [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States) [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States); Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208 (United States); Petford-Long, Amanda K. [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States) [Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 (United States); Center for Nanoscale Materials, Argonne National Laboratory, Argonne IL, 60439 (United States); Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208 (United States); Gao, Kai-Zhong [Head and Media R and D, Seagate Technology, Bloomington, MN 55435 (United States)] [Head and Media R and D, Seagate Technology, Bloomington, MN 55435 (United States)

2012-10-15T23:59:59.000Z

411

Enhanced x-ray imaging for a thin film cochlear implant with metal artefacts using phase retrieval tomography  

SciTech Connect

Phase retrieval tomography has been successfully used to enhance imaging in systems that exhibit poor absorption contrast. However, when highly absorbing regions are present in a sample, so-called metal artefacts can appear in the tomographic reconstruction. We demonstrate that straightforward approaches for metal artefact reconstruction, developed in absorption contrast tomography, can be applied when using phase retrieval. Using a prototype thin film cochlear implant that has high and low absorption components made from iridium (or platinum) and plastic, respectively, we show that segmentation of the various components is possible and hence measurement of the electrode geometry and relative location to other regions of interest can be achieved.

Arhatari, B. D. [Department of Physics, La Trobe University, Victoria 3086 (Australia); ARC Centre of Excellence for Coherent X-ray Science, Melbourne (Australia); Harris, A. R.; Paolini, A. G. [School of Psychological Science, La Trobe University, Victoria 3086 (Australia); ARC Centre of Excellence for Electromaterials Science, Melbourne (Australia); Peele, A. G. [Department of Physics, La Trobe University, Victoria 3086 (Australia); ARC Centre of Excellence for Coherent X-ray Science, Melbourne (Australia); Australian Synchrotron, Victoria 3168 (Australia)

2012-06-01T23:59:59.000Z

412

Electron holographic tomography for mapping the three-dimensional distribution of electrostatic potential in III-V semiconductor nanowires  

Science Conference Proceedings (OSTI)

Electron holographic tomography (EHT), the combination of off-axis electron holography with electron tomography, is a technique, which can be applied to the quantitative 3-dimensional (3D) mapping of electrostatic potential at the nanoscale. Here, we show the results obtained in the EHT investigation of GaAs and GaAs-AlGaAs core-shell nanowires grown by Au-catalysed metalorganic vapor phase epitaxy. The unique ability of EHT of disentangling the materials mean inner potential (MIP) from the specimen projected thickness allows reconstruction of the nanowire 3D morphology and inner compositional structure as well as the measurement of the MIP.

Wolf, D.; Lichte, H. [Triebenberg Laboratory, Institute of Structure Physics, Technische Universitaet Dresden, D-01062 Dresden (Germany); Pozzi, G. [Department of Physics, Universita di Bologna, Viale B. Pichat 6/2, I-40127 Bologna (Italy); Prete, P. [IMM-CNR, Lecce Research Unit, S.P. 6 Lecce-Monteroni, I-73100 Lecce (Italy); Lovergine, N. [Dipartimento di Ingegneria dell'Innovazione, Universita del Salento, S.P. 6 Lecce-Monteroni, I-73100 Lecce (Italy)

2011-06-27T23:59:59.000Z

413

Print http://us.mg4.mail.yahoo.com/neo/launch?.rand=deOsgk04ks40i Subject: RE: [s-w-h] b Solar verses wind efficiency  

E-Print Network (OSTI)

.yahoo.com/neo/launch?.rand=deOsgk04ks40i Subject: RE: [s-w-h] b Solar verses wind efficiency From: Michael Klemen (wind4energy;Print http://us.rng4.mail.yahoo.comlneo/launch?.rand=deOsgko4ks4 energy in the wind is proportional://www.ndsu.edu/ndsu/klemen/Perfect_Turbine.htm You can see that for an ideal real life wind turbine ("good turbine") the increase in energy

414

3-D Electrical Resistivity Tomography for Cliff Stability Assessment at Pointe du Hoc in Normandy, France  

E-Print Network (OSTI)

Pointe du Hoc overlooking the English Channel in Normandy, France was host to one of the most important military engagements of World War II. While the site is a valuable historic cultural resource, it is vulnerable to cliff collapses that already have endangered the observation post and Rudder?s command post. The observation post has been closed to visitors for some time due to safety concerns. Geophysical techniques have been used increasingly in recent years for slope stability investigation purposes. The objective of this study is to apply advanced 3?D resistivity tomography toward a detailed site stability assessment with special attention to the two at-risk buildings. 3?D resistivity tomography datasets at Pointe du Hoc in the presence of extreme topography and dense cultural clutter have been successfully acquired, inverted, and interpreted. The cliff stability in the areas around the two at?risk buildings has been analyzed. A hazard assessment scheme has been designed in which regions of high resistivity are interpreted as zones of open, dry fractures with a moderate mass movement potential. Regions of low resistivity are zones of wet, clay?filled fractures with a high mass movement potential. The observation post tomography results indicate that the highest mass movement hazard appears to be associated with the marine caverns at the base of the cliff that are positioned at the point of strongest wave attack. These caverns likely occupy the future site of development of a sea arch which will definitely threaten the observation post building. A high probability of a soil wedge failure is on the east?facing cliff edge close to the observation post that could damage or destroy the building. The mass movement potential at the Rudder?s command post area is low to moderate. The greatest risk is associated with soil wedge failures at the top of the cliffs. The resistivity geophysical data add great value to the natural geohazard assessment at Pointe du Hoc and constitute an integral component of an interdisciplinary approach to the problem of cultural resource preservation at the site. Geophysics is a non?invasive and relatively inexpensive technology that provides unique constraints which are unobtainable using traditional engineering geology methods for site characterization. However, the technology is difficult to master and the inherent limitations must be carefully understood to ensure a reliable geotechnical interpretation.

Udphuay, Suwimon

2008-12-01T23:59:59.000Z

415

Derivation of site-specific relationships between hydraulic parameters and p-wave velocities based on hydraulic and seismic tomography  

SciTech Connect

In this study, hydraulic and seismic tomographic measurements were used to derive a site-specific relationship between the geophysical parameter p-wave velocity and the hydraulic parameters, diffusivity and specific storage. Our field study includes diffusivity tomograms derived from hydraulic travel time tomography, specific storage tomograms, derived from hydraulic attenuation tomography, and p-wave velocity tomograms, derived from seismic tomography. The tomographic inversion was performed in all three cases with the SIRT (Simultaneous Iterative Reconstruction Technique) algorithm, using a ray tracing technique with curved trajectories. The experimental set-up was designed such that the p-wave velocity tomogram overlaps the hydraulic tomograms by half. The experiments were performed at a wellcharacterized sand and gravel aquifer, located in the Leine River valley near Gttingen, Germany. Access to the shallow subsurface was provided by direct-push technology. The high spatial resolution of hydraulic and seismic tomography was exploited to derive representative site-specific relationships between the hydraulic and geophysical parameters, based on the area where geophysical and hydraulic tests were performed. The transformation of the p-wave velocities into hydraulic properties was undertaken using a k-means cluster analysis. Results demonstrate that the combination of hydraulic and geophysical tomographic data is a promising approach to improve hydrogeophysical site characterization.

Brauchler, R.; Doetsch, J.; Dietrich, P.; Sauter, M.

2012-01-10T23:59:59.000Z

416

arXiv:astro-ph/0208093v327Nov2002 Dark Energy and Matter Evolution from Lensing Tomography  

E-Print Network (OSTI)

arXiv:astro-ph/0208093v327Nov2002 Dark Energy and Matter Evolution from Lensing Tomography Wayne Hu on the growth function of structure and the evolution of the dark energy density. We examine this potential tests for the existence of multiple dark matter components or a dark energy component

Hu, Wayne

417

Storage of Pressuirzed Carbon Dioxide in Coal Observed Using X-Ray Tomography  

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

OF PRESSURIZED CARBON DIOXIDE IN COAL OBSERVED USING X-RAY OF PRESSURIZED CARBON DIOXIDE IN COAL OBSERVED USING X-RAY TOMOGRAPHY Jonathan P. Mathews (jpm10@psu.edu; 814 863 6213) Ozgen Karacan, (karacan@pnge.psu.edu; 814 865 9570) Phillip Halleck (phil@pnge.psu.edu; 814 863 1701) Gareth D. Mitchell (n8h@psu.edu; 814 863 6543) Abraham Grader (grader@pnge.psu.edu; 814 863 5813) The Energy Institute & Department of Energy & GeoEnvironmental Engineering 151 Holser Building, The Pennsylvania State University University Park, PA 16802 Introduction The sequestration of CO 2 in coal seams has been proposed as a mitigation strategy for climate change. To maximize sorption potential it is essential that the heterogeneity of the coal seam be represented in the computational models used to predict the complex flow and sorption within

418

Pre- and post-selected quantum states: density matrices, tomography, and Kraus operators  

E-Print Network (OSTI)

We present a general formalism for charecterizing 2-time quantum states, describing pre- and post-selected quantum systems. The most general 2-time state is characterized by a `density vector' that is independent of measurements performed between the preparation and post-selection. We provide a method for performing tomography of an unknown 2-time density vector. This procedure, which cannot be implemented by weak or projective measurements, brings new insight to the fundamental role played by Kraus operators in quantum measurements. Finally, after showing that general states and measurements are isomorphic, we show that any measurement on a 2-time state can be mapped to a measurement on a preselected bipartite state.

Ralph Silva; Yelena Guryanova; Nicolas Brunner; Noah Linden; Anthony J. Short; Sandu Popescu

2013-08-09T23:59:59.000Z

419

Demonstration of Emitted-Neutron Computed Tomography to Quantify Nuclear Materials  

Science Conference Proceedings (OSTI)

In this document, we report demonstration of emitted-neutron computed tomography using fast fission neutrons to infer the geometry of sources of special nuclear material (SNM). The imaging system employed in the demonstration is based on a newly constructed array of pixelated neutron detectors that are suitable for arrangement in a close-packed imaging array and whose active volume consists of liquid scintillator EJ-309 which allows neutron-gamma discrimination via pulse shape to enable essentially pure fast-neutron imaging. The system is capable of high quality fast-neutron imaging where tomographic reconstruction of slices through an object resolves neutron sources similar in dimension to a fuel pellet, or about 1 cm. During measurements of Pu MOX fuel rodlet arrays in soup cans at the INL ZPPR facility, the position of a partial defect of a single rodlet containing Pu replaced by one containing depleted uranium (DU) was detected.

Hausladen, Paul [ORNL; Blackston, Matthew A [ORNL; Newby, Robert Jason [ORNL

2011-09-01T23:59:59.000Z

420

Monitoring Carbon Dioxide Sequestration Using Electrical Resistance Tomography (ERT): Sensitivity Studies  

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

Monitoring Carbon Dioxide Sequestration Using Electrical Resistance Monitoring Carbon Dioxide Sequestration Using Electrical Resistance Tomography (ERT): Sensitivity Studies Robin L. Newmark (newmark@llnl.gov, 925-423-3644) Abelardo L. Ramirez (ramirez3@llnl.gov; 925-422-6909) William D. Daily (daily1@llnl.gov; 925-422-8623) Lawrence Livermore National Laboratory P.O. Box 808 Livermore, Ca. 94550 Abstract If geologic formations are used to sequester carbon dioxide (CO 2 ), monitoring the CO 2 injection will be required to confirm the performance of the reservoir system, assess leaks and flow paths, and understand the geophysical and geochemical interactions between the CO 2 and the geologic minerals and fluids. Electrical methods are well suited for monitoring processes involving fluids, as electrical properties are sensitive to the

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421

Time-dependent seismic tomography of the Coso geothermal area, 1996-2004 |  

Open Energy Info (EERE)

of the Coso geothermal area, 1996-2004 of the Coso geothermal area, 1996-2004 Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Time-dependent seismic tomography of the Coso geothermal area, 1996-2004 Details Activities (1) Areas (1) Regions (0) Abstract: Local-earthquake tomographic images were calculated for each of the years 1996 - 2004 using arrival times from the U.S. Navy's permanent seismometer network at the Coso geothermal area, California. The results show irregular strengthening with time of the wave-speed ratio VP/VS at shallow depths. These changes result predominately from progressive relative increase in VS with respect to VP, and could result from processes associated with geothermal operations such as decrease in fluid pressure and the drying of argillaceous minerals such as illite.

422

Coherent exciton dynamics in supramolecular light-harvesting nanotubes revealed by ultrafast quantum process tomography  

E-Print Network (OSTI)

Long-lived exciton coherences have been recently observed in photosynthetic complexes via ultrafast spectroscopy, opening exciting possibilities for the study and design of coherent exciton transport. Yet, ambiguity in the spectroscopic signals has led to arguments for interpreting them in terms of the exciton dynamics, demanding more stringent tests. We propose a novel strategy, Quantum Process Tomography (QPT) for ultrafast spectroscopy, to reconstruct the evolving quantum state of excitons in double-walled supramolecular light-harvesting nanotubes at room temperature. The protocol calls for eight transient grating experiments with varied pulse spectra. Our analysis reveals unidirectional energy transfer from the outer to the inner wall excitons, absence of nonsecular processes, and an unexpected coherence between those two states lasting about 150 femtoseconds, indicating weak electronic coupling between the walls. Our work constitutes the first experimental QPT in a 'warm' and complex system, and provides an elegant scheme to maximize information from ultrafast spectroscopy experiments.

Joel Yuen-Zhou; Dylan H. Arias; Dorthe M. Eisele; Colby P. Steiner; Jacob J. Krich; Moungi Bawendi; Keith A. Nelson; Aln Aspuru-Guzik

2013-08-19T23:59:59.000Z

423

Atomic Scale Characterization of Compound Semiconductors using Atom Probe Tomography: Preprint  

DOE Green Energy (OSTI)

Internal interfaces are critical in determining the performance of III-V multijunction solar cells. Studying these interfaces with atomic resolution using a combination of transmission electron microscopy (TEM), atom probe tomography (APT), and density functional calculations enables a more fundamental understanding of carrier dynamics in photovoltaic (PV) device structures. To achieve full atomic scale spatial and chemical resolution, data acquisition parameters in laser pulsed APT must be carefully studied to eliminate surface diffusion. Atom probe data with minimized group V ion clustering and expected stoichiometry can be achieved by adjusting laser pulse power, pulse repetition rate, and specimen preparation parameters such that heat flow away from the evaporating surface is maximized. Applying these improved analysis conditions to III-V based PV gives an atomic scale understanding of compositional and dopant profiles across interfaces and tunnel junctions and the initial stages of alloy clustering and dopant accumulation. Details on APT experimental methods and future in-situ instrumentation developments are illustrated.

Gorman, B. P.; Guthrey, H.; Norman, A. G.; Al-Jassim, M.; Lawrence, D.; Prosa, T.

2011-07-01T23:59:59.000Z

424

Carbon nanotube based microfocus field emission x-ray source for microcomputed tomography  

Science Conference Proceedings (OSTI)

Microcomputed tomography is now widely used for in vivo small animal imaging for cancer studies. Achieving high imaging quality of live objects requires the x-ray source to have both high spatial and temporal resolutions. Preliminary studies have shown that carbon nanotube (CNT) based field emission x-ray source has significant intrinsic advantages over the conventional thermionic x-ray tube including better temporal resolution and programmability. Here we report the design and characterization of a CNT based field emission x-ray source that also affords a high spatial resolution. The device uses modified asymmetric Einzel lenses for electron focusing and an elliptical shaped CNT cathode patterned by photolithography. Stable and small isotropic x-ray focal spot sizes were obtained.

Liu Zejian; Yang Guang; Lee, Yueh Z.; Bordelon, David; Lu Jianping; Zhou, Otto [Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599 (United States); School of Medicine, University of North Carolina, Chapel Hill, North Carolina 27599 (United States); Curriculum in Applied and Materials Sciences, University of North Carolina, Chapel Hill, North Carolina 27599 (United States); Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599 and Curriculum in Applied and Materials Sciences, University of North Carolina, Chapel Hill, North Carolina 27599 (United States)

2006-09-04T23:59:59.000Z

425

Constructing Anatomically Accurate Face Models using Computed Tomography and Cyberware data  

E-Print Network (OSTI)

Facial animation and cranio-facial surgery simulation both stand to benefit from the development of anatomically accurate computer models of the human face. State-of-theart biomechanical models of the face have shown promise in animation, but they are inadequate for the purposes of cranio-facial surgery simulation. The goal of this thesis is to develop an improved facial model, using Cyberware data which captures the external structure and appearance of the face and head, as well as computed tomography (CT) data which captures the internal structure of facial soft and hard tissues. To this end, we develop algorithms to (1) register the CT and Cyberware datasets, (2) extract from the CT data a skull subsurface which serves as a foundation of the soft-tissue model, and (3) compute thic...

Faisal Zubair Qureshi

2000-01-01T23:59:59.000Z

426

Semiconductor detectors for medical tomography with high-energy heavy ions  

SciTech Connect

High-energy heavy ion beams are in use at the Lawrence Berkeley Laboratory for cancer therapy. In order to take full advantage of the very favorable depth-dose characteristics of those beams, it is necessary to determine the stopping characteristics of the ions in the complex media of a human with greater accuracy than obtainable with x-ray CAT scanning. Initial measurements with an array of Si dE/dx position sensitive detectors and a windowless thin planar Ge detector used in a side entry mode show the potential for fabricating an instrument for high accuracy on-line CAT scanning using the same ions to be used for therapy. It is estimated that one tomography can be obtained with a dose of 0.72 Rad-gm.

Llacer, J.; Haller, E.E.; Hansen, W.L.; Walton, J.T.; Batho, E.K.

1980-11-01T23:59:59.000Z

427

Comparison of radionuclide scans with computer-assisted tomography in diagnosis of intracranial disease  

SciTech Connect

Radionuclide brain scans were compared with computer-assisted tomography (CAT) for the diagnosis of intracranial disorders in 297 patients. The diagnosis was confirmed in 281 patients who formed the population for the study. The radionuclide scan was false positive for 12 patients (3.9 percent) and false negative for eight (2.6 percent). The CAT was false positive for three patients (1 percent) and false negative for one (0.3 percent). In the 133 patients in whom both tests were negative, no evidence of central nervous system pathology has been found during the 6 to 18 month follow-up. Brain tumors and intracerebral hemorrhage are more readily detectable with CAT.

Clifford, J.R.; Connolly, E.S.; Voorhies, R.M.

1976-12-01T23:59:59.000Z

428

Computed axial tomography (CAT) contribution for dosimetry and treatment evaluation in lung cancer  

SciTech Connect

The use of computed axial tomography (CAT) scans in postoperative patients with lung cancer was studied to evaluate its contribution in dosimetry and to study the late effects of irradiation. Comparisons were made between the treatment planning generated from CAT scan data and that obtained from two orthogonal radiographs. Both methods offered a good approximation but with orthogonal radiographs possible mediastinal and lung shift could not be seen and the dose delivered to the spinal cord was overestimated. A control CAT scan performed 6 to 18 months after treatment showed a lung fibrosis that was strictly correlated with the treatment planning and related with doses and volume treated. CAT scans allowed more accurate treatment planning.

Van Houtte, P.; Piron, A.; Lustman-Marechal, J.; Osteaux, M.; Henry, J.

1980-08-01T23:59:59.000Z

429

Investigation of plasma-doped fin structure and characterization of dopants by atom probe tomography  

Science Conference Proceedings (OSTI)

As and P dopants in a plasma-doped Si-based fin structure were analyzed using atom probe tomography. The distributions and concentrations of As and P atoms in various regions of the fin structure and the oxidation levels for different dopants were determined. Most dopants were segregated at the fin boundary, and the As and P concentrations exceeded 9 Multiplication-Sign 10{sup 20} atoms/cm{sup 3} and 2 Multiplication-Sign 10{sup 20} atoms/cm{sup 3}, respectively. The atomic oxygen and SiO{sub 2} concentrations depended on the dopant type. The larger and heavier As dopant severely damaged the surface of the fin structure and could cause more severe oxidation.

Kim, B. H.; Park, S. M. [Department of Materials Science and Engineering, POSTECH, Pohang (Korea, Republic of); Park, S. W.; Park, Y. B.; Kim, H. J. [Research and Development Division, SK Hynix, 2091, Gyeongchung-daero, Bubal-eub, Ichon-si, Gyeonggi-do (Korea, Republic of); Park, C. G. [Department of Materials Science and Engineering, POSTECH, Pohang (Korea, Republic of); National Center for Nanomaterials Technology (NCNT), Pohang 790-784 (Korea, Republic of)

2012-11-19T23:59:59.000Z

430

Computing traveltime and amplitude sensitivity kernels in finite-frequency tomography  

Science Conference Proceedings (OSTI)

The efficient computation of finite-frequency traveltime and amplitude sensitivity kernels for velocity and attenuation perturbations in global seismic tomography poses problems both of numerical precision and of validity of the paraxial approximation used. We investigate these aspects, using a local model parameterization in the form of a tetrahedral grid with linear interpolation in between grid nodes. The matrix coefficients of the linear inverse problem involve a volume integral of the product of the finite-frequency kernel with the basis functions that represent the linear interpolation. We use local and global tests as well as analytical expressions to test the numerical precision of the frequency and spatial quadrature. There is a trade-off between narrowing the bandpass filter and quadrature accuracy and efficiency. Using a minimum step size of 10 km for S waves and 30 km for SS waves, relative errors in the quadrature are of the order of 1% for direct waves such as S, and a few percent for SS waves, which are below data uncertainties in delay time or amplitude anomaly observations in global seismology. Larger errors may occur wherever the sensitivity extends over a large volume and the paraxial approximation breaks down at large distance from the ray. This is especially noticeable for minimax phases such as SS waves with periods >20 s, when kernels become hyperbolic near the reflection point and appreciable sensitivity extends over thousands of km. Errors becomes intolerable at epicentral distance near the antipode when sensitivity extends over all azimuths in the mantle. Effects of such errors may become noticeable at epicentral distances > 140{sup o}. We conclude that the paraxial approximation offers an efficient method for computing the matrix system for finite-frequency inversions in global tomography, though care should be taken near reflection points, and alternative methods are needed to compute sensitivity near the antipode.

Tian Yue [Department of Geosciences, Guyot Hall, Princeton University, NJ 08544 (United States)], E-mail: ytian@princeton.edu; Montelli, Raffaella [ExxonMobil Upstream Research Company, P.O. Box 22189, GW03-940A, Houston, TX 77252-2189 (United States); Nolet, Guust; Dahlen, F.A. [Department of Geosciences, Guyot Hall, Princeton University, NJ 08544 (United States)

2007-10-01T23:59:59.000Z

431

Markov Random Field Based Automatic Image Alignment for ElectronTomography  

SciTech Connect

Cryo electron tomography (cryo-ET) is the primary method for obtaining 3D reconstructions of intact bacteria, viruses, and complex molecular machines ([7],[2]). It first flash freezes a specimen in a thin layer of ice, and then rotates the ice sheet in a transmission electron microscope (TEM) recording images of different projections through the sample. The resulting images are aligned and then back projected to form the desired 3-D model. The typical resolution of biological electron microscope is on the order of 1 nm per pixel which means that small imprecision in the microscope's stage or lenses can cause large alignment errors. To enable a high precision alignment, biologists add a small number of spherical gold beads to the sample before it is frozen. These beads generate high contrast dots in the image that can be tracked across projections. Each gold bead can be seen as a marker with a fixed location in 3D, which provides the reference points to bring all the images to a common frame as in the classical structure from motion problem. A high accuracy alignment is critical to obtain a high resolution tomogram (usually on the order of 5-15nm resolution). While some methods try to automate the task of tracking markers and aligning the images ([8],[4]), they require user intervention if the SNR of the image becomes too low. Unfortunately, cryogenic electron tomography (or cryo-ET) often has poor SNR, since the samples are relatively thick (for TEM) and the restricted electron dose usually results in projections with SNR under 0 dB. This paper shows that formulating this problem as a most-likely estimation task yields an approach that is able to automatically align with high precision cryo-ET datasets using inference in graphical models. This approach has been packaged into a publicly available software called RAPTOR-Robust Alignment and Projection estimation for Tomographic Reconstruction.

Moussavi, Farshid; Amat, Fernando; Comolli, Luis R.; Elidan, Gal; Downing, Kenneth H.; Horowitz, Mark

2007-11-30T23:59:59.000Z

432

Print This Article Print this article Close This Window  

E-Print Network (OSTI)

together, as opposed to today's nuclear reactors and weapons, which produce energy by blowing atoms apart nuclear fusion program, a ministry spokesman said Tuesday. Japan Minister Plans Push for Nuclear Fusion, both of which are bidding for the International Thermonuclear Experimental Reactor (ITER). The European

433

Roll Printed Electronics: Development and Scaling of Gravure Printing Techniques  

E-Print Network (OSTI)

Advanced Nanoproducts (ANP), and Inktec were spun ontosilver nanoparticle inks: a) ANP DGP ink diluted in a-b) diluted and filtered ANP DGP, c) ANP Silverjet, d) Inktec

de la Fuente Vornbrock, Alejandro

2009-01-01T23:59:59.000Z

434

H7, Reverse Offset Roll Printing Using High Resolution Printing ...  

Science Conference Proceedings (OSTI)

DD3, A New Approach to Make ZnO-Cu2O Heterojunctions for Solar Cells ... E2, AlGaAs/GaAs/GaN Wafer Fused HBTs with Ar Implanted Extrinsic Collectors.

435

Impact of computed tomography and {sup 18}F-deoxyglucose coincidence detection emission tomography image fusion for optimization of conformal radiotherapy in non-small-cell lung cancer  

SciTech Connect

Purpose: To report a retrospective study concerning the impact of fused {sup 18}F-fluoro-deoxy-D-glucose (FDG)-hybrid positron emission tomography (PET) and CT images on three-dimensional conformal radiotherapy planning for patients with non-small-cell lung cancer. Methods and Materials: A total of 101 patients consecutively treated for Stage I-III non-small-cell lung cancer were studied. Each patient underwent CT and FDG-hybrid PET for simulation treatment in the same treatment position. Images were coregistered using five fiducial markers. Target volume delineation was initially performed on the CT images, and the corresponding FDG-PET data were subsequently used as an overlay to the CT data to define the target volume. Results: {sup 18}F-fluoro-deoxy-D-glucose-PET identified previously undetected distant metastatic disease in 8 patients, making them ineligible for curative conformal radiotherapy (1 patient presented with some positive uptake corresponding to concomitant pulmonary tuberculosis). Another patient was ineligible for curative treatment because the fused PET-CT images demonstrated excessively extensive intrathoracic disease. The gross tumor volume (GTV) was decreased by CT-PET image fusion in 21 patients (23%) and was increased in 24 patients (26%). The GTV reduction was {>=}25% in 7 patients because CT-PET image fusion reduced the pulmonary GTV in 6 patients (3 patients with atelectasis) and the mediastinal nodal GTV in 1 patient. The GTV increase was {>=}25% in 14 patients owing to an increase in the pulmonary GTV in 11 patients (4 patients with atelectasis) and detection of occult mediastinal lymph node involvement in 3 patients. Of 81 patients receiving a total dose of {>=}60 Gy at the International Commission on Radiation Units and Measurements point, after CT-PET image fusion, the percentage of total lung volume receiving >20 Gy increased in 15 cases and decreased in 22. The percentage of total heart volume receiving >36 Gy increased in 8 patients and decreased in 14. The spinal cord volume receiving at least 45 Gy (2 patients) decreased. Multivariate analysis showed that tumor with atelectasis was the single independent factor that resulted in a significant effect on the modification of the size of the GTV by FDG-PET: tumor with atelectasis (with vs. without atelectasis, p = 0.0001). Conclusion: The results of our study have confirmed that integrated hybrid PET/CT in the treatment position and coregistered images have an impact on treatment planning and management of non-small-cell lung cancer. However, FDG images using dedicated PET scanners and respiration-gated acquisition protocols could improve the PET-CT image coregistration. Furthermore, the impact on treatment outcome remains to be demonstrated.

Deniaud-Alexandre, Elisabeth [Department of Radiation Oncology, Tenon Hospital A.P.-H.P., Paris (France); Touboul, Emmanuel [Department of Radiation Oncology, Tenon Hospital A.P.-H.P., Paris (France)]. E-mail: emmanuel.touboul@tnn.aphp.fr; Lerouge, Delphine [Department of Radiation Oncology, Tenon Hospital A.P.-H.P., Paris (France); Grahek, Dany [Department of Nuclear Medicine, Tenon Hospital A.P.-H.P., Paris (France); Foulquier, Jean-Noel [Department of Radiation Oncology, Tenon Hospital A.P.-H.P., Paris (France); Petegnief, Yolande [Department of Nuclear Medicine, Tenon Hospital A.P.-H.P., Paris (France); Gres, Benoit [Department of Radiation Oncology, Tenon Hospital A.P.-H.P., Paris (France); El Balaa, Hanna [Department of Radiation Oncology, Tenon Hospital A.P.-H.P., Paris (France); Keraudy, Katia [Department of Radiation Oncology, Tenon Hospital A.P.-H.P., Paris (France); Kerrou, Kaldoun [Department of Nuclear Medicine, Tenon Hospital A.P.-H.P., Paris (France); Montravers, Francoise [Department of Nuclear Medicine, Tenon Hospital A.P.-H.P., Paris (France); Milleron, Bernard [Department of Respiratory Medicine, Tenon Hospital A.P.-H.P., Paris (France); Lebeau, Bernard [Department of Respiratory Medicine, Saint-Antoine Hospital A.P.-H.P., Paris (France) and Cancerest, Paris VI University, Paris (France); Talbot, Jean-Noel [Department of Nuclear Medicine, Tenon Hospital A.P.-H.P., Paris (France)

2005-12-01T23:59:59.000Z

436

Addressing the risks of diagnostic radiology : what should be done about the increasing use of computed tomography in the United States  

E-Print Network (OSTI)

Computed tomography (CT) is a prominent procedure in the US with larger radiation doses than traditional radiology. CT is a powerful tool in the diagnosis of a wide variety of conditions and its use has grown quickly because ...

Eastwick, Gary (Gary A.)

2010-01-01T23:59:59.000Z

437

Acoustic Tomography as a Remote Sensing Method to Investigate the Near-Surface Atmospheric Boundary Layer in Comparison with In Situ Measurements  

Science Conference Proceedings (OSTI)

The acoustic tomography method is applied in the atmospheric surface layer to observe near-surface temperature fields. Important advantages of this technique are the remote sensing capacity and the possibility of directly deriving area-average ...

Astrid Ziemann; Klaus Arnold; Armin Raabe

2002-08-01T23:59:59.000Z

438

Print - Lawrence Livermore National Laboratory  

The increasing national and international demand for water has led to increasing reliance on subsurface storage, both for naturally and artificially recharged water.

439

Print - Lawrence Livermore National Laboratory  

... (LLNL). In the late eighties he started and led the Industrial Partnering program while he was Associate Director for Engineering. In 1995, ...

440

Print - Lawrence Livermore National Laboratory  

UltraSpec is a new analytical tool for examining nuclear materials non-destructively. UltraSpec is a high-energy resolution spectrometer that can be used to ...

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441

Printed in the United Kingdom  

E-Print Network (OSTI)

The objectives of this study were to assess population biology and dynamics of the squat lobster Galathea intermedia. On the basis of nearly regular monthly samples taken with a 2-m beam trawl in the Helgoland trench (HTR) during the period of 1985 until 1992, sex ratio, length composition, relative growth and reproduction were studied. The overall sex ratio deviates significantly from 1:1 with 1(^:1.89 (P ^ 0.001). On average, sexes are equally large, but adult females attain a slightly larger size than adult males. No sex-specific differences in the length-weight relationship were found. Relative growth of the first abdominal segment is clearly of sexual-dimorphic character. On the basis of the length-frequency distributions, the life cycle of the HTR population lasts between one and two years. According to the appearance of ovigerous females and juveniles, reproduction and recruitment are clearly seasonal. Recruitment takes place between July and December. The main reproduction begins in April and ends in September, with a peak between June and August. A significant increase of specimens showing both male and female morphological characters, referred to as morphological hermaphrodites (P^0.001), and males (P^0.05) respectively, was detected.

Katrin Kronenberger; Michael Tiirkay

2003-01-01T23:59:59.000Z

442

For printed Discussion Papers contact:  

E-Print Network (OSTI)

This paper analyses the demand response from residential electricity consumers to a demand charge grid tariff. The tariff charges the maximum hourly peak consumption in each of the winter months January, February and December, thus giving incentives to reduce peak consumption. We use hourly electricity consumption data from 443 households, as well as data on their network and power prices, the local temperature, wind speed and hours of daylight. The panel data set is analysed with a fixed effects regression model. The estimates indicate a demand reduction between 0.07 and 0.27 kWh/h in response to the tariff. This is on average a 5 percent reduction, with a maximum reduction of 9 percent in hour 8. The consumers did not receive any information on their continuous consumption or any reminders when the tariff was in effect. It is likely that the consumption reductions would have been even higher with more information to the consumers.

Andreas V. Stokke; Gerard L. Doorman; Torgeir Ericson

2009-01-01T23:59:59.000Z

443

Print - Lawrence Livermore National Laboratory  

The resultant design is light weight, simple, efficient, and intrinsically compatible with high-voltage transmission-line voltages. Potential ...

444

Print - Lawrence Livermore National Laboratory  

Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988 Operated by Lawrence Livermore National Security, LLC ...

445

Print - Lawrence Livermore National Laboratory  

... in a variety of exercises, including a 5 star node configuration outdoors with satellite exfiltration and simultaneous internet broadcast.

446

Print - Lawrence Livermore National Laboratory  

... or in home healthcare settings. ... Operated by Lawrence Livermore National Security, LLC, for the Department of Energy's National Nuclear Security Administration

447

Pretty printing with lazy dequeues  

Science Conference Proceedings (OSTI)

There are several purely functional libraries for converting tree structured data into indented text, but they all make use of some backtracking. Over twenty years ago, Oppen published a more efficient imperative implementation of a pretty printer. This ... Keywords: Haskell, lazy functional programming

Olaf Chitil

2005-01-01T23:59:59.000Z

448

Print - Lawrence Livermore National Laboratory  

R&D 100 Awards. R&D 100 Awards are considered the "Oscars of Innovation". The winning of an R&D 100 Award provides a mark of excellence known to industry, government ...

449

Fact Sheets & Other Printed Material  

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

Lab History News Categories Contacts Select a Category... Accelerator Test Facility Brookhaven Discoveries Center for Functional Nanomaterials (CFN) Computational Sciences Center...

450

Print - Lawrence Livermore National Laboratory  

Container drums and barrels are commonly known and widely used for shipping, storage, etc. They typically have a rigid cylindrical construction, such as steel, and ...

451

Print - Lawrence Livermore National Laboratory  

Concrete structures are ubiquitous in the infrastructure of the country. Bridge decks, roadways, parking structures and more require condition assessment and ...

452

Fact Sheets & Other Printed Material  

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

Nanomaterials (CFN) Computational Sciences Center (CSC) Counterterrorism Initiatives Diversity Programs Educational Programs Energy Sciences Exhibit Displays General Information...

453

Print - Lawrence Livermore National Laboratory  

... we've established a program for LLNL scientists and engineers to join a company for up to three ... for the Department of Energy's National Nuclear Security ...

454

Print - Lawrence Livermore National Laboratory  

Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988 Operated by Lawrence Livermore ...

455

Print - Lawrence Livermore National Laboratory  

Improving security at U.S. seaports is one of the nations most difficult technical and practical challenges. Detection of contraband such as special ...

456

timeline_PNNL_PRINT.indd  

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

reprocessing of weapons-grade nuclear fuels. 1940s The government created the 85-million Atomic Energy Commission laboratory complex operated by General Electric at Hanford for...

457

Print - Lawrence Livermore National Laboratory  

Solar power is a renewable source of energy that involves no fossil fuel combustion, and releases no greenhouse gases. In the past, solar power has not been ...

458

Copyright Information (For Print Volume)  

Science Conference Proceedings (OSTI)

...1. Metals??Handbooks, manuals, etc. 2. Metal-work??Handbooks, manuals, etc. I. ASM International. Handbook Committee.

459

Print - Lawrence Livermore National Laboratory  

... building, geology, etc.) to be ... LLNL is seeking potential commercial partners that ... Custom electronics have been implemented to control the ...

460

Participant Advance Information PLEASE PRINT!  

Science Conference Proceedings (OSTI)

... Hotel Workshop participants may select from a ... for a listing of area hotels: http://www ... of Education, Department of Energy's Advanced Manufacturing ...

2013-01-23T23:59:59.000Z

Note: This page contains sample records for the topic "tomography print humankind" from the National Library of EnergyBeta (NLEBeta).
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461

For printed Discussion Papers contact:  

E-Print Network (OSTI)

Globalisation of natural gas markets effects on prices and trade patterns The regional natural gas markets are expected to gradually become more integrated. The major driving forces are lower LNG costs, more spot trade, and increased need for imports into the US and other key markets. In this paper we examine various scenarios for a future global gas market, particularly focusing on natural gas prices and trade patterns. We use a numerical model of the international energy markets, with detailed modelling of regional gas production and international gas transport. Scenarios with different assumptions about future demand and supply conditions are simulated. Our results suggest that trade between continents will grow considerably over the next couple of decades, and that prices in the main import regions will remain around current levels. However, significant constraints on exports from the Middle East may alter this picture.

Finn Roar Aune; Knut Einar Rosendahl; Eirik Lund Sagen; Jel Classification C

2008-01-01T23:59:59.000Z

462

Print - Lawrence Livermore National Laboratory  

Animal and Crop Health; Homeland Security; Food/Product Safety; Force Protection; Forensics; Molecular Diagnostics; Development Status.

463

timeline_PNNL_PRINT.indd  

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

1997 PNNL developed a highly sensitive sampleranalyzer that can be used to prevent proliferation of nuclear weapons by remotely detect- ing trace quantities of materials...

464

Print - Lawrence Livermore National Laboratory  

Security and energy conservation ; Fluid level sensing ; Transportation; Medical; Radar imaging; Material evaluation; Tools; Voice recognition ...

465

Print - Lawrence Livermore National Laboratory  

Under a cooperative research and development project, ... (power generation ... in both propulsion and structures and saving airlines hundreds of millions of ...

466

High-speed digitization readout of silicon photomultipliers for time of flight positron emission tomography  

Science Conference Proceedings (OSTI)

We report on work to develop a system with about 100 picoseconds (ps) time resolution for time of flight positron emission tomography [TOF-PET]. The chosen photo detectors for the study were Silicon Photomultipliers (SiPM's). This study was based on extensive experience in studying timing properties of SiPM's. The readout of these devices used the commercial high speed digitizer DRS4. We applied different algorithms to get the best time resolution of 155 ps Guassian (sigma) for a LYSO crystal coupled to a SiPM. We consider the work as a first step in building a prototype TOF-PET module. The field of positron-emission-tomography (PET) has been rapidly developing. But there are significant limitations in how well current PET scanners can reconstruct images, related to how fast data can be acquired, how much volume they can image, and the spatial and temporal resolution of the generated photons. Typical modern scanners now include multiple rings of detectors, which can image a large volume of the patient. In this type of scanner, one can treat each ring as a separate detector and require coincidences only within the ring, or treat the entire region viewed by the scanner as a single 3 dimensional volume. This 3d technique has significantly better sensitivity since more photon pair trajectories are accepted. However, the scattering of photons within the volume of the patient, and the effect of random coincidences limits the technique. The advent of sub-nanosecond timing resolution detectors means that there is potentially much better rejection of scattered photon events and random coincidence events in the 3D technique. In addition, if the timing is good enough, then the origin of photons pairs can be determined better, resulting in improved spatial resolution - so called 'Time-of-Flight' PET, or TOF-PET. Currently a lot of activity has occurred in applications of SiPMs for TOF-PET. This is due to the devices very good time resolution, low profile, lack of high voltage needed, and their non-sensitivity to magnetic fields. While investigations into this technique have begun elsewhere, we feel that the extensive SiPM characterization and data acquisition expertise of Fermilab, and the historical in-depth research of PET imaging at University of Chicago will combine to make significant strides in this field. We also benefit by a working relationship with the SiPM producer STMicroelectronics (STM).

Ronzhin, A.; Los, S.; Martens, M.; Ramberg, E.; /Fermilab; Kim, H.; Chen, C.; Kao, C.; /Chicago U.; Niessen, K.; /SUNY, Buffalo; Zatserklyaniy, A.; /Puerto Rico U., Mayaguez; Mazzillo, M.; Carbone, B.; /SGS Thomson, Catania

2011-02-01T23:59:59.000Z

467

Cranial computed tomography and real-time sonography in full-term neonates and infants  

Science Conference Proceedings (OSTI)

The results of cranial ultrasonography (US) and computed tomography (CT) were compared in 52 full-term neonates and young infants. The chief indications for examination included: increasing head size, dysmorphic features, myelomeningocele, inflammatory disease, and asphyxia. Disorders detected included hydrocephalus, parenchymal abnormalities, intracranial hemorrhage, extraparenchymal fluid collections, and vascular and other developmental malformations. CT and US essentially were equivalent in detecting hydrocephalus, moderate to large intraventricular hemorrhages or subdural collections, and large focal parenchymal lesions, although CT was somewhat better in determining the level and cause of obstruction in patients with hydrocephalus and characterizing parenchymal abnormalities. CT was more sensitive than ultrasound in detecting subarachnoid hemorrhage (100% vs. 0%), diffuse parenchymal abnormality (100% vs. 33%), and small intraventricular hemorrhages (100% vs. 0%) but these lesions often were not clinically significant. The results suggest that US should be used as the primary neuroradiological examination in term infants; CT probably should be reserved for further investigation after US in those patients with a history of hypoxia and progressive clinical deterioration.

Siegel, M.J.; Patel, J.; Gado, M.H.; Shackelford, G.D.

1983-10-01T23:59:59.000Z

468

Reduced-order model for electrical impedance tomography based on proper orthogonal decomposition  

E-Print Network (OSTI)

Electrical impedance tomography (EIT) is an imaging modality in which the conductivity distribution inside a target is reconstructed based on voltage measurements from the surface of the target. Reconstructing the conductivity distribution is known to be an ill-posed inverse problem, the solutions of which are highly intolerant to modelling errors. In order to achieve sufficient accuracy, very dense meshes are usually needed in a finite element approximation of the EIT forward model. This leads to very high-dimensional problems and often unacceptably tedious computations for real-time applications. In this paper, the model reduction in EIT is considered within the Bayesian inversion framework. We construct the reduced-order model by proper orthogonal decompositions (POD) of the electrical conductivity and the potential distributions. The associated POD modes are computed based on a priori information on the conductivity. The feasibility of the reduced-order model is tested both numerically and with experimental data. In the selected test cases, the proposed model reduction approach speeds up the computation by more than two orders of magnitude in comparison with the conventional EIT reconstruction, without decreasing the quality of the reconstructed images significantly.

Antti Lipponen; Aku Seppnen; Jari Kaipio

2012-07-04T23:59:59.000Z

469

3-D Transient Hydraulic Tomography in Unconfined Aquifers with Fast Drainage Response  

SciTech Connect

We investigate, through numerical experiments, the viability of three-dimensional transient hydraulic tomography (3DTHT) for identifying the spatial distribution of groundwater flow parameters (primarily, hydraulic conductivity K) in permeable, unconfined aquifers. To invert the large amount of transient data collected from 3DTHT surveys, we utilize an iterative geostatistical inversion strategy in which outer iterations progressively increase the number of data points fitted and inner iterations solve the quasilinear geostatistical formulas of Kitanidis. In order to base our numerical experiments around realistic scenarios, we utilize pumping rates, geometries, and test lengths similar to those attainable during 3DTHT field campaigns performed at the Boise Hydrogeophysical Research Site (BHRS). We also utilize hydrologic parameters that are similar to those observed at the BHRS and in other unconsolidated, unconfined fluvial aquifers. In addition to estimating K, we test the ability of 3DTHT to estimate both average storage values (specific storage Ss and specific yield Sy) as well as spatial variability in storage coefficients. The effects of model conceptualization errors during unconfined 3DTHT are investigated including: (1) assuming constant storage coefficients during inversion and (2) assuming stationary geostatistical parameter variability. Overall, our findings indicate that estimation of K is slightly degraded if storage parameters must be jointly estimated, but that this effect is quite small compared with the degradation of estimates due to violation of structural geostatistical assumptions. Practically, we find for our scenarios that assuming constant storage values during inversion does not appear to have a significant effect on K estimates or uncertainty bounds.

Cardiff, Michael A.; Barrash, Warren

2011-12-16T23:59:59.000Z

470

Multicontrast x-ray computed tomography imaging using Talbot-Lau interferometry without phase stepping  

SciTech Connect

Purpose: The purpose of this work is to demonstrate that multicontrast computed tomography (CT) imaging can be performed using a Talbot-Lau interferometer without phase stepping, thus allowing for an acquisition scheme like that used for standard absorption CT. Methods: Rather than using phase stepping to extract refraction, small-angle scattering (SAS), and absorption signals, the two gratings of a Talbot-Lau interferometer were rotated slightly to generate a moire pattern on the detector. A Fourier analysis of the moire pattern was performed to obtain separate projection images of each of the three contrast signals, all from the same single-shot of x-ray exposure. After the signals were extracted from the detector data for all view angles, image reconstruction was performed to obtain absorption, refraction, and SAS CT images. A physical phantom was scanned to validate the proposed data acquisition method. The results were compared with a phantom scan using the standard phase stepping approach. Results: The reconstruction of each contrast mechanism produced the expected results. Signal levels and contrasts match those obtained using the phase stepping technique. Conclusions: Absorption, refraction, and SAS CT imaging can be achieved using the Talbot-Lau interferometer without the additional overhead of long scan time and phase stepping.

Bevins, Nicholas; Zambelli, Joseph; Li Ke; Qi Zhihua; Chen Guanghong [Department of Medical Physics, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, Wisconsin 53705 (United States); Department of Medical Physics, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, Wisconsin 53705 (United States) and Department of Radiology, University of Wisconsin-Madison, 600 Highland Avenue, Madison, Wisconsin 53792 (United States)

2012-01-15T23:59:59.000Z

471

High-resolution seismic tomography of compressional wave velocity structure at Newberry Volcano, Oregon Cascade Range  

SciTech Connect

Compressional wave velocity structure is determined for the upper crust beneath Newberry Volcano, central Oregon, using a high-resolution active-source seismic-tomography method. Newberry Volcano is a bimodal shield volcano east of the axis of the Cascade Range. It is associated both with the Cascade Range and with northwest migrating silicic volcanism in southeast Oregon. High-frequency (approx.7 Hz) crustal phases, nominally Pg and a midcrustal reflected phase, travel upward through a target volume beneath Newberry Volcano to a dense array of 120 seismographs. This arrangement is limited by station spacing to 1- to 2-km resolution in the upper 5 to 6 km of the crust beneath the volcano's summit caldera. The experiment tests the hypothesis that Cascade Range volcanoes are underlain only by small magma chambers. A small low-velocity anomaly delineated abosut 3 km below the summit caldera supports this hypothesis for Newberry Volcano and is interpreted as a possible magma chamber of a few to a few tens of km/sup 3/ in volume. A ring-shaped high-velocity anomaly nearer the surface coincides with the inner mapped ring fractures of the caldera. It also coincides with a circular gravity high, and we interpret it as largely subsolidus silicic cone sheets. The presence of this anomaly and of silicic vents along the ring fractures suggests that the fractures are a likely eruption path between the small magma chamber and the surface.

Achauer, U.; Evans, J.R.; Stauber, D.A.

1988-09-10T23:59:59.000Z

472

Seismic surface wave tomography of waste sites. 1997 annual progress report  

Science Conference Proceedings (OSTI)

'The objective of the Seismic Surface Wave Tomography of Waste Sites is to develop a robust technique for field acquisition and analysis of surface wave data for the interpretation of shallow structures, such as those associated with the burial of wastes. The analysis technique is to be developed and tested on an existing set of seismic data covering the K-901 burial site at the East Tennessee Technology Park. Also, a portable prototype for a field acquisition system will be designed and developed to obtain additional data for analysis and testing of the technique. The K-901 data have been examined and a preliminary Single Valued Decomposition inversion has been obtained. The preliminary data indicates a need for additional seismic data to ground-truth the inversion. The originally proposed gravity data acquisition has been dropped because sufficient gravity data are now available for a preliminary analysis and because the seismic data are considered more critical to the interpretation. The proposed prototype for the portable acquisition and analysis system was developed during the first year and will be used in part of the acquisition of additional seismic data.'

Long, T.L.

1997-10-14T23:59:59.000Z

473

Study of noise effects in electrical impedance tomography with resistor networks  

E-Print Network (OSTI)

We present a study of the numerical solution of the two dimensional electrical impedance tomography problem, with noisy measurements of the Dirichlet to Neumann map. The inversion uses parametrizations of the conductivity on optimal grids. The grids are optimal in the sense that finite volume discretizations on them give spectrally accurate approximations of the Dirichlet to Neumann map. The approximations are Dirichlet to Neumann maps of special resistor networks, that are uniquely recoverable from the measurements. Inversion on optimal grids has been proposed and analyzed recently, but the study of noise effects on the inversion has not been carried out. In this paper we present a numerical study of both the linearized and the nonlinear inverse problem. We take three different parametrizations of the unknown conductivity, with the same number of degrees of freedom. We obtain that the parametrization induced by the inversion on optimal grids is the most efficient of the three, because it gives the smallest standard deviation of the maximum a posteriori estimates of the conductivity, uniformly in the domain. For the nonlinear problem we compute the mean and variance of the maximum a posteriori estimates of the conductivity, on optimal grids. For small noise, we obtain that the estimates are unbiased and their variance is very close to the optimal one, given by the Cramer-Rao bound. For larger noise we use regularization and quantify the trade-off between reducing the variance and introducing bias in the solution. Both the full and partial measurement setups are considered.

Liliana Borcea; Fernando Guevara Vasquez; Alexander V. Mamonov

2011-05-05T23:59:59.000Z

474

X-Ray Energy Responses of Silicon Tomography Detectors Irradiated with Fusion Produced Neutrons  

Science Conference Proceedings (OSTI)

In order to clarify the effects of fusion-produced neutron irradiation on silicon semiconductor x-ray detectors, the x-ray energy responses of both n- and p-type silicon tomography detectors used in the Joint European Torus (JET) tokamak (n-type) and the GAMMA 10 tandem mirror (p-type) are studied using synchrotron radiation at the Photon Factory of the National Laboratory for High Energy Accelerator Research Organization (KEK). The fusion neutronics source (FNS) of Japan Atomic Energy Research Institute (JAERI) is employed as well-calibrated D-T neutron source with fluences from 10{sup 13} to 10{sup 15} neutrons/cm{sup 2} onto these semiconductor detectors. Different fluence dependence is found between these two types of detectors; that is, (i) for the n-type detector, the recovery of the degraded response is found after the neutron exposure beyond around 10{sup 13} neutrons/cm{sup 2} onto the detector. A further finding is followed as a 're-degradation' by a neutron irradiation level over about 10{sup 14} neutrons/cm{sup 2}. On the other hand, (ii) the energy response of the p-type detector shows only a gradual decrease with increasing neutron fluences. These properties are interpreted by our proposed theory on semiconductor x-ray responses in terms of the effects of neutrons on the effective doping concentration and the diffusion length of a semiconductor detector.

Kohagura, J. [Plasma Research Centre, University of Tsukuba (Japan); Cho, T. [Plasma Research Centre, University of Tsukuba (Japan); Hirata, M. [Plasma Research Centre, University of Tsukuba (Japan); Numakura, T. [Plasma Research Centre, University of Tsukuba (Japan); Yokoyama, N. [Plasma Research Centre, University of Tsukuba (Japan); Fukai, T. [Plasma Research Centre, University of Tsukuba (Japan); Tomii, Y. [Plasma Research Centre, University of Tsukuba (Japan); Tokioka, S. [Plasma Research Centre, University of Tsukuba (Japan); Miyake, Y. [Plasma Research Centre, University of Tsukuba (Japan); Kiminami, S. [Plasma Research Centre, University of Tsukuba (Japan); Shimizu, K. [Plasma Research Centre, University of Tsukuba (Japan); Miyoshi, S. [Plasma Research Centre, University of Tsukuba (Japan); Hirano, K. [High Energy Accelerator Research Organization (Japan); Yoshida, M. [Japan Atomic Energy Research Institute (Japan); Yamauchi, M. [Japan Atomic Energy Research Institute (Japan); Kondoh, T. [Japan Atomic Energy Research Institute (Japan); Nishitani, T. [Japan Atomic Energy Research Institute (Japan)

2005-01-15T23:59:59.000Z

475

Geometric classification of open-cell metal foams using X-ray micro-computed tomography  

Science Conference Proceedings (OSTI)

The geometry of foams has long been an area of interest, and a number of idealized geometric descriptions have been proposed. In order to acquire detailed, quantitative, geometric data for aluminum open-cell metal foams, X-ray {mu}CT is employed. The X-ray {mu}CT images are analyzed using specialized software, FoamView Registered-Sign , from which geometric information including strut length and pore shapes are extracted. The X-ray {mu}CT analysis allows comparison of the ideal geometric models to the actual geometric characteristics of the metal foam samples. The results reveal a high variability in ligament length, as well as features supporting the ideal geometry known as the Weaire-Phelan unit cell. The geometric findings provide information useful for improving current models of open-cell metal foam. Applications can range from predicting heat transfer or load failure to predicting liquid retention. Highlights: Black-Right-Pointing-Pointer Aluminum open-cell metal foams are geometrically classified Black-Right-Pointing-Pointer X-ray micro-computed tomography and specialized software are used to gather geometric data Black-Right-Pointing-Pointer The foams are shown to have a high variability in strut length Black-Right-Pointing-Pointer The Weaire-Phelan unit cell is shown to be a better representative of these foams.

Bock, Jessica, E-mail: bock6@illinois.edu; Jacobi, Anthony M., E-mail: a-jacobi@illinois.edu

2013-01-15T23:59:59.000Z

476

Further advancements for large area-detector based computed tomography system  

SciTech Connect

We present advancements made to a large area-detector based system for industrial x-ray computed tomography. Past performance improvements in data acquisition speeds were made by use of high-resolution large area, flat-panel amorphous-silicon (a-Si) detectors. The detectors have proven, over several years, to be a robust alternative to CCD-optics and image intensifier CT systems. These detectors also provide the advantage of area detection as compared with the single slice geometry of linear array systems. New advancements in this system include parallel processing of sinogram reconstructions, improved visualization software and migration to frame-rate a-Si detectors. Parallel processing provides significant speed improvements for data reconstruction, and is implemented for parallel-beam, fan-beam and Feldkamp cone-beam reconstruction algorithms. Reconstruction times are reduced by an order of magnitude by use of a cluster of ten or more equal-speed computers. Advancements in data visualization are made through interactive software, which allows interrogation of the full three-dimensional dataset. Inspection examples presented in this paper include an electromechanical device, a nonliving biological specimen and a press-cast plastic specimen. We also present a commonplace item for the benefit of the layperson.

Davis, A. W. (Anthony W.); Keating, S. C. (Scott C.); Claytor, T. N. (Thomas N.)

2001-01-01T23:59:59.000Z

477

Evaluation of positron emission tomography as a method to visualize subsurface microbial processes  

Science Conference Proceedings (OSTI)

Positron emission tomography (PET) provides spatiotemporal monitoring in a nondestructive manner and has higher sensitivity and resolution relative to other tomographic methods. Therefore, this technology was evaluated for its application to monitor in situ subsurface bacterial activity. To date, however, it has not been used to monitor or image soil microbial processes. In this study, PET imaging was applied as a 'proof-of-principle' method to assess the feasibility of visualizing a radiotracer labeled subsurface bacterial strain (Rahnella sp. Y9602), previously isolated from uranium contaminated soils and shown to promote uranium phosphate precipitation. Soil columns packed with acid-purified simulated mineral soils were seeded with 2-deoxy-2-[{sup 18}F]fluoro-d-glucose ({sup 18}FDG) labeled Rahnella sp. Y9602. The applicability of [{sup 18}F]fluoride ion as a tracer for measuring hydraulic conductivity and {sup 18}FDG as a tracer to identify subsurface metabolically active bacteria was successful in our soil column studies. Our findings indicate that positron-emitting isotopes can be utilized for studies aimed at elucidating subsurface microbiology and geochemical processes important in contaminant remediation.

Kinsella K.; Schlyer D.; Kinsella, K.; Schlyer, D.J.; Fowler, J.S.; Martinez, R.J.; Sobecky, P.A.

2012-01-18T23:59:59.000Z

478

Progress in Cell Marking for Synchrotron X-ray Computed Tomography  

SciTech Connect

Recently there has been an increase in research activity into finding ways of marking cells in live animals for pre-clinical trials. Development of certain drugs and other therapies crucially depend on tracking particular cells or cell types in living systems. Therefore cell marking techniques are required which will enable longitudinal studies, where individuals can be examined several times over the course of a therapy or study. The benefits of being able to study both disease and therapy progression in individuals, rather than cohorts are clear. The need for high contrast 3-D imaging, without harming or altering the biological system requires a non-invasive yet penetrating imaging technique. The technique will also have to provide an appropriate spatial and contrast resolution. X-ray computed tomography offers rapid acquisition of 3-D images and is set to become one of the principal imaging techniques in this area. Work by our group over the last few years has shown that marking cells with gold nano-particles (GNP) is an effective means of visualising marked cells in-vivo using x-ray CT. Here we report the latest results from these studies. Synchrotron X-ray CT images of brain lesions in rats taken using the SYRMEP facility at the Elettra synchrotron in 2009 have been compared with histological examination of the tissues. Some deductions are drawn about the visibility of the gold loaded cells in both light microscopy and x-ray imaging.

Hall, Christopher [Monash Centre for Synchrotron Science, Monash University, Imaging and Medical Beam Line, Australian Synchrotron (Australia); Sturm, Erica [Department of Medical Imaging and Radiation Sciences, Monash University (Australia); Schultke, Elisabeth [Dept of Stereotactic Neurosurgery, Albert Ludwigs University of Freiburg (Germany); Arfelli, Fulvia; Astolfo, Alberto [Department of Physics, University of Trieste, Trieste (Italy); Menk, Ralf-Hendrik [Sincrotrone Trieste SCpA, Trieste (Italy); Juurlink, Bernhard H. J. [College of Medicine, Alfaisal University, Riyadh (Saudi Arabia)

2010-07-23T23:59:59.000Z

479

Performance of a Drift Chamber Candidate for a Cosmic Muon Tomography System  

SciTech Connect

In the last decade, many groups around the world have been exploring different ways to probe transport containers which may contain illicit Special Nuclear Materials such as uranium. The muon tomography technique has been proposed as a cost effective system with an acceptable accuracy. A group of Canadian institutions (see above), funded by Defence Research and Development Canada, is testing different technologies to track the cosmic muons. One candidate is the single wire Drift Chamber. With the capability of a 2D impact position measurement, two detectors will be placed above and two below the object to be probed. In order to achieve a good 3D image quality of the cargo content, a good angular resolution is required. The simulation showed that 1mrad was required implying the spatial resolution of the trackers must be in the range of 1 to 2 mm for 1 m separation. A tracking system using three prototypes has been built and tested. The spatial resolution obtained is 1.7 mm perpendicular to the wire and 3 mm along the wire.

Anghel, V.; Jewett, C.; Jonkmans, G.; Thompson, M. [Atomic Energy of Canada Limited, Chalk River, Ontario (Canada); Armitage, J.; Botte, J.; Boudjemline, K.; Erlandson, A.; Oakham, G. [Ottawa-Carleton Institute for Physics, Department of Physics, Carleton University, Ottawa, Ontario (Canada); Bueno, J.; Bryman, D.; Liu, Z. [Advanced Applied Physics Solutions, Vancouver, British Columbia (Canada); Charles, E.; Gallant, G. [Canada Border Services Agency, Ottawa, Ontario (Canada); Cousins, T.; Noel, S. [International Safety Research, Ottawa, Ontario (Canada); Drouin, P.-L.; Waller, D. [Defence Research and Development Canada, Ottawa, Ontario (Canada); Stocki, T. J. [Health Canada, Ottawa, Ontario (Canada)

2011-12-13T23:59:59.000Z

480

Design of Mega-Voltage X-ray Digital Radiography and Computed Tomography Performance Phantoms  

SciTech Connect

A number of fundamental scientific questions have arisen concerning the operation of high-energy DR and CT systems. Some of these questions include: (1) How deeply can such systems penetrate thickly shielded objects? (2) How well can such systems distinguish between dense and relatively high Z materials such as lead, tungsten and depleted uranium and lower Z materials such as steel, copper and tin? (3) How well will such systems operate for a uranium material which is an intermediate case between low density yellowcake and high density depleted uranium metal? These questions have led us to develop a set of phantoms to help answer these questions, but do not have any direct bearing on any smuggling concern. These new phantoms are designed to allow a systemic exploration of these questions by gradually varying their compositions and thicknesses. These phantoms are also good probes of the blurring behavior of radiography and tomography systems. These phantoms are composed of steel ({rho} assumed to be 7.8 g/cc), lead ({rho} assumed to be 11.4 g/cc), tungsten ({rho} assumed to be 19.25 g/cc), uranium oxide (UO{sub 3}) ({rho} assumed to be 4.6 g/cc), and depleted uranium (DU) ({rho} assumed to be 18.9 g/cc). There are five designed phantoms described in this report: (1) Cylindrical shells of Tungsten and Steel; (2) Depleted Uranium Inside Tungsten Hemi-cube Shells; (3) Nested Spherical Shells; (4) UO{sub 3} Cylinder; and (5) Shielded DU Sphere.

Aufderheide, M B; Martz, H E; Curtin, M

2009-06-22T23:59:59.000Z

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481

Patient self-attenuation and technologist dose in positron emission tomography  

SciTech Connect

Positron emission tomography (PET), with 511-keV radiation and long patient-uptake times, presents unique radiation safety concerns. This two-part study considers aspects of PET radiation safety as they relate to PET suite design, dose to the public, and technologist occupational dose. In the first part of the study, the self-attenuation of radiation by patients' bodies was quantified. The radiation exposure was measured at three positions from 64 patients injected with fluorine-18 fluorodeoxyglucose (FDG) during the uptake period. Compared with an in vitro control used as a point source, a significant decrease in exposure (>40% at 1 m) was observed due to nonuniform distribution of FDG and attenuation within the patients. The attenuation data are consistent with results from simulations [M. E. Phelps, ''Comments and Perspectives,'' J. Nucl. Med. 45, 1601 (2004)] that treat the body as a uniform, water-filled cylinder. As distance is often the principal source of protection for 511-keV radiation, the considerable self-attenuation may allow for more compact PET suites. However, despite high patient self-attenuation, shielding, and standard precautionary measures, PET technologist occupational doses can remain quite high ({approx}12 mSv/year). The second part of this study tracked the daily dose received by PET technologists. Close technologist-patient interaction both during and following FDG administration, as much as 20 min/study, contribute to the high doses and point to the need for a more innovative approach to radiation protection for PET technologists.

Zeff, Benjamin W.; Yester, Michael V. [Department of Radiology, University of Alabama at Birmingham, Birmingham, Alabama 35233 (United States)

2005-04-01T23:59:59.000Z

482

Demonstration of Emitted-Neutron Computed Tomography to Count Fuel Pins  

SciTech Connect

In this paper, we report demonstration of emitted-neutron computed tomography using fast fission neutrons to infer the geometry of sources of special nuclear material (SNM) such as fuel pins. In a proof-of-concept measurement at the Idaho National Laboratory s (INL s) Zero Power Physics Reactor (ZPPR) facility, an array of unirradiated Pu MOX fuel rodlets in a soup can were imaged, and a bias defect consisting of a single rodlet containing Pu replaced by one containing depleted uranium (DU) was detected. The imaging system employed in the demonstration is based on a newly constructed array of pixelated neutron detectors that are suitable for arrangement in a close-packed imaging array and whose active volume consists of liquid scintillator EJ-309 which allows neutron-gamma discrimination via pulse shape to enable pure fast-neutron imaging. The imaging array was used along with a radial collimator aperture in order to perform high quality fast-neutron imaging where tomographic reconstruction of slices through an object resolve neutron sources similar in dimension to a fuel pellet, or about 1 cm. Measurements were performed at Oak Ridge National Laboratory (ORNL) with neutron sources in addition to those performed at the INL s ZPPR facility with Pu MOX fuel rodlets. An analogous capability to detect single-pin defects in spent fuel assemblies would be desirable, such as for safeguards verification measurements of spent fuel assemblies just prior to transferring them from the spent fuel cooling pool to long term dry cask storage. This paper describes the design and construction of the present imager, characterization measurements with neutron sources at ORNL, measurements with SNM at INL s ZPPR facility, and feasibility of building an analogous imager for spent fuel measurements.

Hausladen, Paul [ORNL; Blackston, Matthew A [ORNL; Brubaker, E. [Sandia National Laboratories (SNL); Chichester, David [Idaho National Laboratory (INL); Marleau, P. [Sandia National Laboratories (SNL); Newby, Robert Jason [ORNL

2012-01-01T23:59:59.000Z

483

Positron Emission Tomography (PET) Evaluation After Initial Chemotherapy and Radiation Therapy Predicts Local Control in Rhabdomyosarcoma  

Science Conference Proceedings (OSTI)

Purpose: 18-fluorodeoxyglucose positron emission tomography (PET) is already an integral part of staging in rhabdomyosarcoma. We investigated whether primary-site treatment response characterized by serial PET imaging at specific time points can be correlated with local control. Patients and Methods: We retrospectively examined 94 patients with rhabdomyosarcoma who received initial chemotherapy 15 weeks (median) before radiotherapy and underwent baseline, preradiation, and postradiation PET. Baseline PET standardized uptake values (SUVmax) and the presence or absence of abnormal uptake (termed PET-positive or PET-negative) both before and after radiation were examined for the primary site. Local relapse-free survival (LRFS) was calculated according to baseline SUVmax, PET-positive status, and PET-negative status by the Kaplan-Meier method, and comparisons were tested with the log-rank test. Results: The median patient age was 11 years. With 3-year median follow-up, LRFS was improved among postradiation PET-negative vs PET-positive patients: 94% vs 75%, P=.02. By contrast, on baseline PET, LRFS was not significantly different for primary-site SUVmax {7 (median), although the findings suggested a trend toward improved LRFS: 96% for SUVmax {7, P=.08. Preradiation PET also suggested a statistically insignificant trend toward improved LRFS for PET-negative (97%) vs PET-positive (81%) patients (P=.06). Conclusion: Negative postradiation PET predicted improved LRFS. Notably, 77% of patients with persistent postradiation uptake did not experience local failure, suggesting that these patients could be closely followed up rather than immediately referred for intervention. Negative baseline and preradiation PET findings suggested statistically insignificant trends toward improved LRFS. Additional study may further understanding of relationships between PET findings at these time points and outcome in rhabdomyosarcoma.

Dharmarajan, Kavita V., E-mail: dharmark@mskcc.org [Departments of Radiation Oncology, Pediatric Oncology, and Nuclear Medicine, Memorial Sloan-Kettering, New York, New York (United States); Wexler, Leonard H.; Gavane, Somali; Fox, Josef J.; Schoder, Heiko; Tom, Ashlyn K.; Price, Alison N.; Meyers, Paul A.; Wolden, Suzanne L. [Departments of Radiation Oncology, Pediatric Oncology, and Nuclear Medicine, Memorial Sloan-Kettering, New York, New York (United States)] [Departments of Radiation Oncology, Pediatric Oncology, and Nuclear Medicine, Memorial Sloan-Kettering, New York, New York (United States)

2012-11-15T23:59:59.000Z

484

Demonstration of Emitted-Neutron Computed Tomography to Count Fuel Pins  

Science Conference Proceedings (OSTI)

In this paper, we report demonstration of emitted-neutron computed tomography using fast fission neutrons to infer the geometry of sources of special nuclear material (SNM) such as fuel pins. In a proof-of-concept measurement at the Idaho National Laboratorys (INLs) Zero Power Physics Reactor (ZPPR) facility, an array of unirradiated Pu MOX fuel rodlets in a soup can were imaged, and a bias defect consisting of a single rodlet containing Pu replaced by one containing depleted uranium (DU) was detected. The imaging system employed in the demonstration is based on a newly constructed array of pixelated neutron detectors that are suitable for arrangement in a close-packed imaging array and whose active volume consists of liquid scintillator EJ-309 which allows neutron-gamma discrimination via pulse shape to enable pure fast-neutron imaging. The imaging array was used along with a radial collimator aperture in order to perform high quality fast-neutron imaging where tomographic reconstruction of slices through an object resolve neutron sources similar in dimension to a fuel pellet, or about 1 cm. Measurements were performed at Oak Ridge National Laboratory (ORNL) with neutron sources in addition to those performed at the INLs ZPPR facility with Pu MOX fuel rodlets. An analogous capability to detect single-pin defects in spent fuel assemblies would be desirable, such as for safeguards verification measurements of spent fuel assemblies just prior to transferring them from the spent fuel cooling pool to long term dry cask storage. This paper describes the design and construction of the present imager, characterization measurements with neutron sources at ORNL, measurements with SNM at INLs ZPPR facility, and feasibility of building an analogous imager for spent fuel measurements.

P. A. Hausladen; M. A. Blackston; E. Brubaker; D. L. Chichester; P. Marleau; R. J. Newby

2012-07-01T23:59:59.000Z

485

Efficacy of Lower-Body Shielding in Computed Tomography Fluoroscopy-Guided Interventions  

Science Conference Proceedings (OSTI)

Purpose: Computed tomography (CT) fluoroscopy-guided interventions pose relevant radiation exposure to the interventionalist. The goal of this study was to analyze the efficacy of lower-body shielding as a simple structural method for decreasing radiation dose to the interventionalist without limiting access to the patient. Material and Methods: All examinations were performed with a 128-slice dual source CT scanner (12 Multiplication-Sign 1.2-mm collimation; 120 kV; and 20, 40, 60, and 80 mAs) and an Alderson-Rando phantom. Scatter radiation was measured with an ionization chamber and a digital dosimeter at standardized positions and heights with and without a lower-body lead shield (0.5-mm lead equivalent; Kenex, Harlow, UK). Dose decreases were computed for the different points of measurement. Results: On average, lower-body shielding decreased scatter radiation by 38.2% within a 150-cm radius around the shielding. This decrease is most significant close to the gantry opening and at low heights of 50 and 100 cm above the floor with a maximum decrease of scatter radiation of 95.9% close to the scanner's isocentre. With increasing distance to the gantry opening, the effect decreased. There is almost no dose decrease effect at {>=}150 above the floor. Scatter radiation and its decrease were linearly correlated with the tube current-time product (r{sup 2} = 0.99), whereas percent scatter radiation decrease was independent of the tube current-time product. Conclusion: Lower-body shielding is an effective way to decrease radiation exposure to the interventionalist and should routinely be used in CT fluoroscopy-guided interventions.

Mahnken, Andreas H., E-mail: mahnken@rad.rwth-aachen.de [RWTH Aachen, Department of Diagnostic and Interventional Radiology (Germany); Sedlmair, Martin [Siemens, Healthcare Sector (Germany); Ritter, Christine [University of Copenhagen, Niels Bohr Institute (Denmark); Banckwitz, Rosemarie; Flohr, Thomas [Siemens, Healthcare Sector (Germany)

2012-12-15T23:59:59.000Z

486

PILOT-SCALE FIELD VALIDATION OF THE LONG ELECTRODE ELECTRICAL RESISTIVITY TOMOGRAPHY METHOD  

SciTech Connect

Field validation for the long electrode electrical resistivity tomography (LE-ERT) method was attempted in order to demonstrate the performance of the technique in imaging a simple buried target. The experiment was an approximately 1/17 scale mock-up of a region encompassing a buried nuclear waste tank on the Hanford site. The target of focus was constructed by manually forming a simulated plume within the vadose zone using a tank waste simulant. The LE-ERT results were compared to ERT using conventional point electrodes on the surface and buried within the survey domain. Using a pole-pole array, both point and long electrode imaging techniques identified the lateral extents of the pre-formed plume with reasonable fidelity, but the LE-ERT was handicapped in reconstructing the vertical boundaries. The pole-dipole and dipole-dipole arrays were also tested with the LE-ERT method and were shown to have the least favorable target properties, including the position of the reconstructed plume relative to the known plume and the intensity of false positive targets. The poor performance of the pole-dipole and dipole-dipole arrays was attributed to an inexhaustive and non-optimal coverage of data at key electrodes, as well as an increased noise for electrode combinations with high geometric factors. However, when comparing the model resolution matrix among the different acquisition strategies, the pole-dipole and dipole-dipole arrays using long electrodes were shown to have significantly higher average and maximum values than any pole-pole array. The model resolution describes how well the inversion model resolves the subsurface. Given the model resolution performance of the pole-dipole and dipole-dipole arrays, it may be worth investing in tools to understand the optimum subset of randomly distributed electrode pairs to produce maximum performance from the inversion model.

GLASER DR; RUCKER DF; CROOK N; LOKE MH

2011-07-14T23:59:59.000Z

487

Nonrigid registration-based coronary artery motion correction for cardiac computed tomography  

SciTech Connect

Purpose: X-ray computed tomography angiography (CTA) is the modality of choice to noninvasively monitor and diagnose heart disease with coronary artery health and stenosis detection being of particular interest. Reliable, clinically relevant coronary artery imaging mandates high spatiotemporal resolution. However, advances in intrinsic scanner spatial resolution (CT scanners are available which combine nearly 900 detector columns with focal spot oversampling) can be tempered by motion blurring, particularly in patients with unstable heartbeats. As a result, recently numerous methods have been devised to improve coronary CTA imaging. Solutions involving hardware, multisector algorithms, or {beta}-blockers are limited by cost, oversimplifying assumptions about cardiac motion, and populations showing contraindications to drugs, respectively. This work introduces an inexpensive algorithmic solution that retrospectively improves the temporal resolution of coronary CTA without significantly affecting spatial resolution. Methods: Given the goal of ruling out coronary stenosis, the method focuses on 'deblurring' the coronary arteries. The approach makes no assumptions about cardiac motion, can be used on exams acquired at high heart rates (even over 75 beats/min), and draws on a fast and accurate three-dimensional (3D) nonrigid bidirectional labeled point matching approach to estimate the trajectories of the coronary arteries during image acquisition. Motion compensation is achieved by employing a 3D warping of a series of partial reconstructions based on the estimated motion fields. Each of these partial reconstructions is created from data acquired over a short time interval. For brevity, the algorithm 'Subphasic Warp and Add' (SWA) reconstruction. Results: The performance of the new motion estimation-compensation approach was evaluated by a systematic observer study conducted using nine human cardiac CTA exams acquired over a range of average heart rates between 68 and 86 beats/min. Algorithm performance was based-lined against exams reconstructed using standard filtered-backprojection (FBP). The study was performed by three experienced reviewers using the American Heart Association's 15-segment model. All vessel segments were evaluated to quantify their viability to allow a clinical diagnosis before and after motion estimation-compensation using SWA. To the best of the authors' knowledge this is the first such observer study to show that an image processing-based software approach can improve the clinical diagnostic value of CTA for coronary artery evaluation. Conclusions: Results from the observer study show that the SWA method described here can dramatically reduce coronary artery motion and preserve real pathology, without affecting spatial resolution. In particular, the method successfully mitigated motion artifacts in 75% of all initially nondiagnostic coronary artery segments, and in over 45% of the cases this improvement was enough to make a previously nondiagnostic vessel segment clinically diagnostic.

Bhagalia, Roshni; Pack, Jed D.; Miller, James V.; Iatrou, Maria [GE Global Research, Niskayuna, New York 12309 (United States); GE Healthcare, Hoboken, New Jersey 07030 (United States)

2012-07-15T23:59:59.000Z

488

A fully 3D approach for metal artifact reduction in computed tomography  

SciTech Connect

Purpose: In computed tomography imaging metal objects in the region of interest introduce inconsistencies during data acquisition. Reconstructing these data leads to an image in spatial domain including star-shaped or stripe-like artifacts. In order to enhance the quality of the resulting image the influence of the metal objects can be reduced. Here, a metal artifact reduction (MAR) approach is proposed that is based on a recomputation of the inconsistent projection data using a fully three-dimensional Fourier-based interpolation. The success of the projection space restoration depends sensitively on a sensible continuation of neighboring structures into the recomputed area. Fortunately, structural information of the entire data is inherently included in the Fourier space of the data. This can be used for a reasonable recomputation of the inconsistent projection data. Methods: The key step of the proposed MAR strategy is the recomputation of the inconsistent projection data based on an interpolation using nonequispaced fast Fourier transforms (NFFT). The NFFT interpolation can be applied in arbitrary dimension. The approach overcomes the problem of adequate neighborhood definitions on irregular grids, since this is inherently given through the usage of higher dimensional Fourier transforms. Here, applications up to the third interpolation dimension are presented and validated. Furthermore, prior knowledge may be included by an appropriate damping of the transform during the interpolation step. This MAR method is applicable on each angular view of a detector row, on two-dimensional projection data as well as on three-dimensional projection data, e.g., a set of sequential acquisitions at different spatial positions, projection data of a spiral acquisition, or cone-beam projection data. Results: Results of the novel MAR scheme based on one-, two-, and three-dimensional NFFT interpolations are presented. All results are compared in projection data space and spatial domain with the well-known one-dimensional linear interpolation strategy. Conclusions: In conclusion, it is recommended to include as much spatial information into the recomputation step as possible. This is realized by increasing the dimension of the NFFT. The resulting image quality can be enhanced considerably.

Kratz, Baerbel; Weyers, Imke; Buzug, Thorsten M. [Institute of Medical Engineering, University of Luebeck, Luebeck 23562 (Germany); Institute of Anatomy, University of Luebeck, Luebeck 23562 (Germany); Institute of Medical Engineering, University of Luebeck, Luebeck 23562 (Germany)

2012-11-15T23:59:59.000Z

489

Kilovoltage Rotational External Beam Radiotherapy on a Breast Computed Tomography Platform: A Feasibility Study  

SciTech Connect

Purpose: To demonstrate the feasibility of a dedicated breast computed tomography (bCT) platform to deliver rotational kilovoltage (kV) external beam radiotherapy (RT) for partial breast irradiation, whole breast irradiation, and dose painting. Methods and Materials: Rotational kV-external beam RT using the geometry of a prototype bCT platform was evaluated using a Monte Carlo simulator. A point source emitting 178 keV photons (approximating a 320-kVp spectrum with 4-mm copper filtration) was rotated around a 14-cm voxelized polyethylene disk (0.1 cm tall) or cylinder (9 cm tall) to simulate primary and primary plus scattered photon interactions, respectively. Simulations were also performed using voxelized bCT patient images. Beam collimation was varied in the x-y plane (1-14 cm) and in the z-direction (0.1-10 cm). Dose painting for multiple foci, line, and ring distributions was demonstrated using multiple rotations with varying beam collimation. Simulations using the scanner's native hardware (120 kVp filtered by 0.2-mm copper) were validated experimentally. Results: As the x-y collimator was narrowed, the two-dimensional dose profiles shifted from a cupped profile with a high edge dose to an increasingly peaked central dose distribution with a sharp dose falloff. Using a 1-cm beam, the cylinder edge dose was <7% of the dose deposition at the cylinder center. Simulations using 120-kVp X-rays showed distributions similar to the experimental measurements. A homogeneous dose distribution (<2.5% dose fluctuation) with a 20% decrease in dose deposition at the cylinder edge (i.e., skin sparing) was demonstrated by weighted summation of four dose profiles using different collimation widths. Simulations using patient bCT images demonstrated the potential for treatment planning and image-guided RT. Conclusions: Rotational kV-external beam RT for partial breast irradiation, dose painting, and whole breast irradiation with skin sparing is feasible on a bCT platform with the potential for high-resolution image-guided RT.

Prionas, Nicolas D.; McKenney, Sarah E. [Department of Radiology, University of California, Davis, Medical Center, Sacramento, California (United States)] [Department of Radiology, University of California, Davis, Medical Center, Sacramento, California (United States); Stern, Robin L. [Department of Radiation Oncology, University of California, Davis, Medical Center, Sacramento, California (United States)] [Department of Radiation Oncology, University of California, Davis, Medical Center, Sacramento, California (United States); Boone, John M., E-mail: jmboone@ucdavis.edu [Department of Radiology, University of California, Davis, Medical Center, Sacramento, California (United States)

2012-10-01T23:59:59.000Z

490

Improved fluorescence-enhanced optical imaging and tomography by enhanced excitation light rejection  

E-Print Network (OSTI)

Fluorescence enhanced optical imaging and tomography studies involve the detection of weak fluorescent signals emanating from nano- to picomolar concentrations of exogenous or endogenously produced fluorophore concurrent with the rejection of an overwhelmingly large component of backscattered excitation light. The elimination of the back-reflected excitation light of the collected signal remains a major and often unrecognized challenge for further reducing the noise floor and increasing sensitivity of small animal fluorescence imaging. In this dissertation, we adapted collimating and gradient index (GRIN) lenses in an existing frequency-domain system to improve excitation light rejection and enhance planar and tomographic imaging. To achieve this goal, we developed planar and tomographic imaging systems based upon ray tracing calculations for improved rejection of excitation light. The out-of-band (S (?x)) to in-band (S (?m) - S (?x)) signal ratio assessing excitation leakage was acquired with and without collimating optics. The addition of collimating optics resulted in a 51 to 75% reduction in the transmission ratio of (S (?x))/ (S (?m) - S (?x)) for the phantom studies and an increase of target to background ratio (TBR) from 11% to 31% in animal studies. Additionally, we presented results demonstrating the improvement of model match between experiments and forward simulation models by adaptation of GRIN lens optics to a breast phantom study. In particular, 128 GRIN lenses on the fiber bundle face were employed to align the collected excitation and emission light normal to the filter surface in an existing frequency-domain system. As a result of GRIN lens collimation, we reduced the transmission ratio between 10 and 86 % and improved the model match for tomographic reconstruction of one (1 cm3) and two (0.1 cm3) targets in a 1087 cm3 of breast phantom. Ultimately, this work improves the sensitivity of NIR fluorescence imaging by enhancing the rejection of excitation light and shows that the current sensitivity challenges for translating fluorescence-enhanced optical imaging into the clinic can be overcome.

Hwang, Kil Dong

2006-12-01T23:59:59.000Z

491

Low-dose computed tomography image restoration using previous normal-dose scan  

Science Conference Proceedings (OSTI)

Purpose: In current computed tomography (CT) examinations, the associated x-ray radiation dose is of a significant concern to patients and operators. A simple and cost-effective means to perform the examinations is to lower the milliampere-seconds (mAs) or kVp parameter (or delivering less x-ray energy to the body) as low as reasonably achievable in data acquisition. However, lowering the mAs parameter will unavoidably increase data noise and the noise would propagate into the CT image if no adequate noise control is applied during image reconstruction. Since a normal-dose high diagnostic CT image scanned previously may be available in some clinical applications, such as CT perfusion imaging and CT angiography (CTA), this paper presents an innovative way to utilize the normal-dose scan as a priori information to induce signal restoration of the current low-dose CT image series. Methods: Unlike conventional local operations on neighboring image voxels, nonlocal means (NLM) algorithm utilizes the redundancy of information across the whole image. This paper adapts the NLM to utilize the redundancy of information in the previous normal-dose scan and further exploits ways to optimize the nonlocal weights for low-dose image restoration in the NLM framework. The resulting algorithm is called the previous normal-dose scan induced nonlocal means (ndiNLM). Because of the optimized nature of nonlocal weights calculation, the ndiNLM algorithm does not depend heavily on image registration between the current low-dose and the previous normal-dose CT scans. Furthermore, the smoothing parameter involved in the ndiNLM algorithm can be adaptively estimated based on the image noise relationship between the current low-dose and the previous normal-dose scanning protocols. Results: Qualitative and quantitative evaluations were carried out on a physical phantom as well as clinical abdominal and brain perfusion CT scans in terms of accuracy and resolution properties. The gain by the use of the previous normal-dose scan via the presented ndiNLM algorithm is noticeable as compared to a similar approach without using the previous normal-dose scan. Conclusions: For low-dose CT image restoration, the presented ndiNLM method is robust in preserving the spatial resolution and identifying the low-contrast structure. The authors can draw the conclusion that the presented ndiNLM algorithm may be useful for some clinical applications such as in perfusion imaging, radiotherapy, tumor surveillance, etc.

Ma, Jianhua; Huang, Jing; Feng, Qianjin; Zhang, Hua; Lu, Hongbing; Liang, Zhengrong; Chen, Wufan [Department of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong 510515, China and Department of Radiology, State University of New York, Stony Brook, New York 11794 (United States); Department of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong 510515 (China); Department of Biomedical Engineering, Fourth Military Medical University, Xi'An, Shanxi 710032 (China); Department of Radiology, State University of New York, Stony Brook, New York 11794 (United States); Department of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong 510515 (China)

2011-10-15T23:59:59.000Z

492

Segmentation and quantification of materials with energy discriminating computed tomography: A phantom study  

Science Conference Proceedings (OSTI)

Purpose: To experimentally investigate whether a computed tomography (CT) system based on CdZnTe (CZT) detectors in conjunction with a least-squares parameter estimation technique can be used to decompose four different materials. Methods: The material decomposition process was divided into a segmentation task and a quantification task. A least-squares minimization algorithm was used to decompose materials with five measurements of the energy dependent linear attenuation coefficients. A small field-of-view energy discriminating CT system was built. The CT system consisted of an x-ray tube, a rotational stage, and an array of CZT detectors. The CZT array was composed of 64 pixels, each of which is 0.8x0.8x3 mm. Images were acquired at 80 kVp in fluoroscopic mode at 50 ms per frame. The detector resolved the x-ray spectrum into energy bins of 22-32, 33-39, 40-46, 47-56, and 57-80 keV. Four phantoms were constructed from polymethylmethacrylate (PMMA), polyethylene, polyoxymethylene, hydroxyapatite, and iodine. Three phantoms were composed of three materials with embedded hydroxyapatite (50, 150, 250, and 350 mg/ml) and iodine (4, 8, 12, and 16 mg/ml) contrast elements. One phantom was composed of four materials with embedded hydroxyapatite (150 and 350 mg/ml) and iodine (8 and 16 mg/ml). Calibrations consisted of PMMA phantoms with either hydroxyapatite (100, 200, 300, 400, and 500 mg/ml) or iodine (5, 15, 25, 35, and 45 mg/ml) embedded. Filtered backprojection and a ramp filter were used to reconstruct images from each energy bin. Material segmentation and quantification were performed and compared between different phantoms. Results: All phantoms were decomposed accurately, but some voxels in the base material regions were incorrectly identified. Average quantification errors of hydroxyapatite/iodine were 9.26/7.13%, 7.73/5.58%, and 12.93/8.23% for the three-material PMMA, polyethylene, and polyoxymethylene phantoms, respectively. The average errors for the four-material phantom were 15.62% and 2.76% for hydroxyapatite and iodine, respectively. Conclusions: The calibrated least-squares minimization technique of decomposition performed well in breast imaging tasks with an energy resolving detector. This method can provide material basis images containing concentrations of the relevant materials that can potentially be valuable in the diagnostic process.

Le, Huy Q.; Molloi, Sabee [Department of Radiological Sciences, University of California, Irvine, California 92697 (United States)

2011-01-15T23:59:59.000Z

493

Imaging of high-Z material for nuclear contraband detection with a minimal prototype of a Muon Tomography station based on GEM detectors  

E-Print Network (OSTI)

Muon Tomography based on the measurement of multiple scattering of atmospheric cosmic ray muons in matter is a promising technique for detecting heavily shielded high-Z radioactive materials (U, Pu) in cargo or vehicles. The technique uses the deflection of cosmic ray muons in matter to perform tomographic imaging of high-Z material inside a probed volume. A Muon Tomography Station (MTS) requires position-sensitive detectors with high spatial resolution for optimal tracking of incoming and outgoing cosmic ray muons. Micro Pattern Gaseous Detector (MPGD) technologies such as Gas Electron Multiplier (GEM) detectors are excellent candidates for this application. We have built and operated a minimal MTS prototype based on 30cm \\times 30cm GEM detectors for probing targets with various Z values inside the MTS volume. We report the first successful detection and imaging of medium-Z and high-Z targets of small volumes (~0.03 liters) using GEM-based Muon Tomography.

Gnanvo, Kondo; Hohlmann, Marcus; Locke, Judson B; Quintero, Amilkar S; Mitra, Debasis

2010-01-01T23:59:59.000Z

494

(/sup 11/C)clorgyline and (/sup 11/C)-L-deprenyl and their use in measuring functional monoamine oxidase activity in the brain using positron emission tomography  

DOE Patents (OSTI)

This invention involves a new strategy for imaging the activity of the enzyme monoamine oxidase in the living body by using /sup 11/C-labeled enzyme inhibitors which bind irreversibly to an enzyme as a result of catalysis. By using positron emission tomography to image the distribution of radioactivity produced by the body penetrating radiation emitted by carbon-11, a map of functionally active monoamine