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Note: This page contains sample records for the topic "gain elevated privileges" 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

U-094: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated Privileges  

Broader source: Energy.gov [DOE]

EMC Documentum Content Server contains a privilege elevation vulnerability that may allow an unauthorized user to obtain highest administrative privileges on the system.

2

T-608: HP Virtual Server Environment Lets Remote Authenticated Users Gain Elevated Privileges  

Broader source: Energy.gov [DOE]

A potential security vulnerability has been identified in HP Virtual Server Environment for Windows. The vulnerability could be exploited remotely to elevate privileges.

3

U-092: Sudo Format String Bug Lets Local Users Gain Elevated Privileges  

Broader source: Energy.gov [DOE]

A local user can supply a specially crafted command line argument to trigger a format string flaw and execute arbitrary commands on the target system with root privileges.

4

T-591: VMware vmrun Utility Lets Local Users Gain Elevated Privileges...  

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

issue is caused due to the vmrun utility incorrectly loading libraries from a certain directory. This can be exploited to execute arbitrary code with privileges of the user running...

5

U-030: Apache Tomcat Lets Untrusted Web Applications Gain Elevated...  

Broader source: Energy.gov (indexed) [DOE]

0: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges U-030: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges November 9, 2011 - 8:30am...

6

U-193: NetBSD System Call Return Value Validation Flaw Lets Local Users Gain Elevated Privileges  

Broader source: Energy.gov [DOE]

On Intel CPUs, the sysret instruction can be manipulated into returning to specific non-canonical addresses, which may yield a CPU reset. We cannot currently rule out with utter confidence that this vulnerability could not also be used to execute code with kernel privilege instead of crashing the system.

7

U-068:Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated...  

Broader source: Energy.gov (indexed) [DOE]

Linux Kernel SGIO ioctl Bug Lets Local Users Gain Elevated Privileges PLATFORM: Red Hat Enterprise Linux Desktop (v. 6) Red Hat Enterprise Linux HPC Node (v. 6) Red Hat...

8

U-178: VMware vMA Library Loading Error Lets Local Users Gain...  

Broader source: Energy.gov (indexed) [DOE]

Buffer Overflow and Null Pointer Dereference Lets Local Users Gain Elevated Privileges U-094: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated Privileges...

9

T-601: Windows Kernel win32k.sys Lets Local Users Gain Elevated...  

Broader source: Energy.gov (indexed) [DOE]

obtain elevated privileges on the target system. A local user can trigger a use-after free or null pointer dereference to execute arbitrary commands on the target system with...

10

V-115: Apple iOS Bugs Let Local Users Gain Elevated Privileges | Department  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment of EnergyProgram2-26TheUtility-Scale Wind &AppleDepartmentof Energy iOS

11

T-591: VMware vmrun Utility Lets Local Users Gain Elevated Privileges |  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of Energy Strain Rate4SuperhardSuspectEnginesSystemsForgery AttacksCode

12

T-595: OpenSUSE aaabase-filename-privilege-escalation  

Broader source: Energy.gov [DOE]

OpenSUSE contains a flaw related to aaa_base failing to properly handle filenames with meta characters during tab expansions. This may allow a context-dependent attacker to use a crafted filename to trick another user to execute arbitrary commands, which may allow the attacker to gain elevated privileges.

13

U-230: Sudo on Red Hat Enterprise Linux %postun Symlink Flaw Lets Local Users Gain Elevated Privileges  

Broader source: Energy.gov [DOE]

An updated sudo package that fixes one security issue and several bugs is now available for Red Hat Enterprise Linux 5.

14

U-086:Linux Kernel "/proc//mem" Privilege Escalation Vulnerability  

Broader source: Energy.gov [DOE]

A vulnerability has been discovered in the Linux Kernel, which can be exploited by malicious, local users to gain escalated privileges.

15

U-112: PostgreSQL Bugs Let Remote Authenticated Users Gain Elevated  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyTheTwo New Energy Storage6 (07/03)Arbitrary Code|Privileges,

16

T-671: Red Hat system-config-firewall Lets Local Users Gain Root...  

Broader source: Energy.gov (indexed) [DOE]

1: Red Hat system-config-firewall Lets Local Users Gain Root Privileges T-671: Red Hat system-config-firewall Lets Local Users Gain Root Privileges July 19, 2011 - 2:42pm Addthis...

17

PRIVILEGED AND CONFIDENTIAL ATTORNEY-CLIENT COMMUNICATION  

E-Print Network [OSTI]

PRIVILEGED AND CONFIDENTIAL ATTORNEY-CLIENT COMMUNICATION LEGAL SERVICES REQUEST FORM Date-2109 This request is a confidential communication and should be treated as such. Indicate "Confidential

18

PRIVILEGED AND CONFIDENTIAL ATTORNEY-CLIENT COMMUNICATION  

E-Print Network [OSTI]

9/29/09 PRIVILEGED AND CONFIDENTIAL ATTORNEY-CLIENT COMMUNICATION LEGAL SERVICES REQUEST FORM`i 96822 Facsimile No.: (808) 956-2109 This request is a confidential communication and should be treated

19

Coal Conversion Facility Privilege Tax Exemptions (North Dakota)  

Broader source: Energy.gov [DOE]

Coal Conversion Facility Privilege Tax Exemptions are granted under a variety of conditions through the North Dakota Tax Department. Privilege tax, which is in lieu of property taxes on the...

20

The X.509 Privilege Management Infrastructure  

E-Print Network [OSTI]

Management Infrastructure (PMI) introduced in the 2000 edition of X.509. It describes the entities Management Infrastructure (PMI), and it enables privileges to be allocated, delegated, revoked and withdrawn in an electronic way. A PMI is to authorisation what a Public Key Infrastructure (PKI) is to authentication

Kent, University of

Note: This page contains sample records for the topic "gain elevated privileges" 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

Autonomic Privilege Management -extending PERMIS to contribute to the  

E-Print Network [OSTI]

privilege management infrastructure (PMI), the new Integrated Project TrustCoM, and autonomic security. It then provides the business case for an autonomic PMI, and looks at the issues that will need to be resolved] is a standard's based Privilege Management Infrastructure (PMI), built according to the ISO 10181-3 Access

Kent, University of

22

Spinorial space-time and privileged space direction (I)  

E-Print Network [OSTI]

Spinorial space-time and privileged space direction (I) Luis Gonzalez-Mestres Abstract Contrary of a privileged space direction are not strange phenomena from the point of view of fundamental space-time geometry. As already emphasized in our previous papers on the subject, the spinorial space-time we

Paris-Sud XI, Universit de

23

Diesel: Applying Privilege Separation to Database Adrienne Porter Felt  

E-Print Network [OSTI]

Diesel: Applying Privilege Separation to Database Access Adrienne Porter Felt Matthew Finifter Joel to lists, requires prior specific permission. #12;Diesel: Applying Privilege Separation to Database Access and code reviewers. We design and construct a system called Diesel, which implements data separation

Wagner, David

24

SVOPME: A scalable virtual organization privileges management environment  

SciTech Connect (OSTI)

Grids enable uniform access to resources by implementing standard interfaces to resource gateways. In the Open Science Grid (OSG), privileges are granted on the basis of the user's membership to a Virtual Organization (VO). However, Grid sites are solely responsible to determine and control access privileges to resources using users identity and personal attributes, which are available through Grid credentials. While this guarantees full control on access rights to the sites, it makes VO privileges heterogeneous throughout the Grid and hardly fits with the Grid paradigm of uniform access to resources. To address these challenges, we are developing the Scalable Virtual Organization Privileges Management Environment (SVOPME), which provides tools for VOs to define and publish desired privileges and assists sites to provide the appropriate access policies. Moreover, SVOPME provides tools for Grid sites to analyze site access policies for various resources, verify compliance with preferred VO policies, and generate directives for site administrators on how the local access policies can be amended to achieve such compliance without taking control of local configurations away from site administrators. This paper discusses what access policies are of interest to the OSG community and how SVOPME implements privilege management for OSG.

Garzoglio, Gabriele; /Fermilab; Wang, Nanbor; /Tech-X, Boulder; Sfiligoi, Igor; Levshina, Tanya; /Fermilab; Anathan, Balamurali; /Tech-X, Boulder

2009-05-01T23:59:59.000Z

25

U-094: EMC Documentum Content Server Lets Local Administrative...  

Broader source: Energy.gov (indexed) [DOE]

4: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated Privileges U-094: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated...

26

V-199: Solaris Bugs Let Local Users Gain Root Privileges, Remote and Local  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists' Research Petroleum ReserveDepartmentScripting AttacksThereDepartment ofFlaw LetsUsers

27

Diesel: Applying Privilege Separation to Database Access Adrienne Porter Felt  

E-Print Network [OSTI]

Diesel: Applying Privilege Separation to Database Access Adrienne Porter Felt UC Berkeley apf reviewers. We construct a system called Diesel, which implements data sep- aration by intercepting database queries and applying mod- ules' restrictions to the queries. We evaluate Diesel on three widely

Wagner, David

28

Crete: Endowed by Nature, Privileged by Geography, Threatened by Tourism?  

E-Print Network [OSTI]

Crete: Endowed by Nature, Privileged by Geography, Threatened by Tourism? Helen Briassoulis in the Mediterranean and the largest Greek island, is a highly heterogeneous region which has experiencedrapid tourism development since the mid- to late 1960s when the growth in international tourism and broader socioeco- nomic

Zaferatos, Nicholas C.

29

T-726:Linux-2.6 privilege escalation/denial of service/information leak  

Broader source: Energy.gov [DOE]

Vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leak.

30

Privilege as a Function of Profit: Network Neutrality and the Digital Public Sphere  

E-Print Network [OSTI]

of the requirements for the designation as UNDERGRADUATE RESEARCH SCHOLAR A Senior Scholars Thesis by BRANDON MATS WARDLAW PRIVILEGE AS A FUNCTION OF PROFIT: NETWORK NEUTRALITY AND THE DIGITAL PUBLIC SPHERE Approved by: Research Advisor... as UNDERGRADUATE RESEARCH SCHOLAR A Senior Scholars Thesis by BRANDON MATS WARDLAW iii ABSTRACT Privilege as a Function of Profit: Network Neutrality and the Digital Public Sphere. (April 2011) Brandon Mats Wardlaw Department of Political Science...

Wardlaw, Brandon

2011-08-08T23:59:59.000Z

31

Gaining a World View  

E-Print Network [OSTI]

tx H 2 O | pg. 26 --------------------------------------------- ???????????????????????? W hen Brandon Hartley traveled to Belgium last summer, he gained a first-hand appreciation for international soil and water issues. Hartley, a Texas A...

Wythe, Kathy

2007-01-01T23:59:59.000Z

32

U-233: Oracle Database INDEXTYPE CTXSYS.CONTEXT Bug Lets Remote...  

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

3: Oracle Database INDEXTYPE CTXSYS.CONTEXT Bug Lets Remote Authenticated Users Gain Elevated Privileges U-233: Oracle Database INDEXTYPE CTXSYS.CONTEXT Bug Lets Remote...

33

V-117: Symantec Enterprise Vault for File System Archiving Unquoted...  

Broader source: Energy.gov (indexed) [DOE]

File System Archiving Unquoted Search Path Lets Local Users Gain Elevated Privileges March 22, 2013 - 6:00am Addthis PROBLEM: A vulnerability was reported in Symantec Enterprise...

34

V-150: Apache VCL Input Validation Flaw Lets Remote Authenticated...  

Broader source: Energy.gov (indexed) [DOE]

Tomcat FORM Authenticator Lets Remote Users Conduct Session Fixation Attacks U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges U-233:...

35

JC3 Bulletin Archive | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Users Execute Arbitrary Code Remote execution of arbitrary code February 2, 2012 U-094: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated Privileges EMC...

36

JC3 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Users Execute Arbitrary Code Remote execution of arbitrary code February 2, 2012 U-094: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated Privileges EMC...

37

RBAC Driven Least Privilege Architecture For Control Systems  

SciTech Connect (OSTI)

The concept of role based access control (RBAC) within the IT environment has been studied by researchers and was supported by NIST (circa 1992). This earlier work highlighted the benefits of RBAC which include reduced administrative workload and policies which are easier to analyze and apply. The goals of this research were to expand the application of RBAC in the following ways. Apply RBAC to the control systems environment: The typical RBAC model within the IT environment is used to control a users access to files. Within the control system environment files are replaced with measurement (e.g., temperature) and control (e.g. valve) points organized as a hierarchy of control assets (e.g. a boiler, compressor, refinery unit). Control points have parameters (e.g., high alarm limit, set point, etc.) associated with them. The RBAC model is extended to support access to points and their parameters based upon roles while at the same time allowing permissions for the points to be defined at the asset level or point level directly. In addition, centralized policy administration with distributed access enforcement mechanisms was developed to support the distributed architecture of distributed control systems and SCADA. Extend the RBAC model to include access control for software and devices: The established RBAC approach is to assign users to roles. This work extends that notion by first breaking the control system down into three layers 1) users, 2) software and 3) devices. An RBAC model is then created for each of these three layers. The result is that RBAC can be used to define machine-to-machine policy enforced via the IP security (IPsec) protocol. This highlights the potential to use RBAC for machine-to-machine connectivity within the internet of things. Enable dynamic policy based upon the operating mode of the system: The IT environment is generally static with respect to policy. However, large cyber physical systems such as industrial controls have various operating modes (start-up, normal operation, emergency, shut-down and maintenance are typical). The policy enforcement architecture must be able to support changes in access permissions as the mode of the control system changes. For example an operators role may not allow the operator to shut down a pump during normal operation but that same operator role may be given permission to shut down the pump if the refinery transitions to emergency mode. The effectiveness of the approach was validated by applying it to the Experion Process Knowledge System. This is a large commercial industrial control system often used to control oil refineries and other assets within the oil and gas sector. As a by-product, other industries using Experion (Pharmaceuticals, Specialty Chemicals, etc.) also benefit from increased security. Policies representative of those that would be used within an oil refinery were created and validated against the RBAC model as implemented in the underlying SQL database. The administration of policy is simplified which in turn makes it practical for security administrators to specify policies which enforce least privilege. The result is a qualitative reduction in risk. The benefits of the enhanced RBAC model are clear and as a result. Honeywell is incorporating portions of the RBAC research into the 2014 release of Experion.

Hull, Julie; Markham, Mark

2014-01-25T23:59:59.000Z

38

Implementing Role Based Access Controls Using X.509 Attribute Certificates the PERMIS Privilege  

E-Print Network [OSTI]

standardise a strong authorisation mechanism, which it calls a Privilege Management Infrastructure (PMI). A PMI provides the authorisation function after the authentication function has taken place, and has a number of similarities with a PKI (see side box). The X.509 PMI standard does not favour any particular

Kent, University of

39

Do Windows Users Follow the Principle of Least Privilege? Investigating User Account Control Practices  

E-Print Network [OSTI]

. INTRODUCTION To limit damages from security breaches, the "principle of least privilege" [16], or PLP for short or part of this work for personal or classroom use is granted without fee. Symposium on Usable Privacy of LUA and related mechanisms by users. The overarching goal of our research is to investigate how well

40

Elevance Pilot-Scale Biorefinery  

Broader source: Energy.gov [DOE]

The Elevance biorefinery uses catalyst technology to produce fuels and chemicals from renewable, natural oils.

Note: This page contains sample records for the topic "gain elevated privileges" 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

Elevated temperature testing of gaskets for bolted flanged connections  

SciTech Connect (OSTI)

Bolted flanged connections are especially prone to leakage when operating at elevated temperatures. In 1986--87, the API Subcommittee on Pressure Vessels, Piping and Tanks expressed a need for gasket performance data and technical formulations to permit the design of gasket systems for high temperature service. The objective was to gain initial understanding of flange behavior, gasket deformation and leakage behavior under simulated elevated temperature service conditions. Experience gained through the previous PVRC-funded elevated temperature test programs as well as companion non-PVRC-funded programs has raised a number of basic questions which would be best answered in the context of a PVRC-supported effort. This Report summarizes the results obtained for four different topics covered in PVRC Grant No. 90-1, namely: (A) verify experimentally the extrapolated long term elevated temperature good performance of compressed asbestos reinforced sheet materials on which are based the MTI guidelines; (B) study the effect of creep/relaxation of flexible graphite sheet materials at elevated temperature on the tightness of a joint in which the gasket deflection remains practically constant; (C) study the effect of the gas medium and pressure on the tightness performance at elevated temperature of graphite filled spiral wound gaskets with and without internal rings; (D) establish correlations between the weight loss of elastomer sheet gasket materials during aging at elevated temperature, and changes in their mechanical properties (tensile strength and relaxation) as well as the variations of their tightness performance.

Derenne, M.; Marchand, L.; Bazergui, A. (Univ. of Montreal, Quebec (Canada). Ecole Polytechnique); Payne, J.R. (J. Payne Associates, Long Valley, NJ (United States))

1994-05-01T23:59:59.000Z

42

U-264: Apple OS X Lets Remote Users Execute Arbitrary Code and...  

Broader source: Energy.gov (indexed) [DOE]

4: Apple OS X Lets Remote Users Execute Arbitrary Code and Local Users Gain Elevated Privileges U-264: Apple OS X Lets Remote Users Execute Arbitrary Code and Local Users Gain...

43

UK Workshop on Grid Security Experiences, Oxford 8th and 9th July 2004 Multilayer Privilege Management for Dynamic Collaborative  

E-Print Network [OSTI]

UK Workshop on Grid Security Experiences, Oxford 8th and 9th July 2004 Multilayer Privilege will witness on-demand creation of dynamically-evolving, scalable Virtual Organisations (VO) spanning national satellite imagery). Being a large project, it would have several work packages involving different parts

Kent, University of

44

Elevance Pilot-Scale Biorefinery  

Broader source: Energy.gov (indexed) [DOE]

July 2011 Printed with a renewable-source ink on paper containing at least 50% wastepaper, including 10% post consumer waste Elevance Integrated Biorefinery This project uses Nobel...

45

T-563: Red Hat Directory Server Bugs Let Local Users Gain Elevated...  

Broader source: Energy.gov (indexed) [DOE]

process when shutting down the Directory Server. Multiple scripts set the LDLIBRARYPATH environment variable to an insecure value containing an empty path CVE-2011-0532. A...

46

U-112: PostgreSQL Bugs Let Remote Authenticated Users Gain Elevated...  

Broader source: Energy.gov (indexed) [DOE]

and Change User Passwords U-129: RSA enVision Bugs Permit Cross-Site Scripting, SQL Injection, and Directory Traversal Attacks U-173: Symantec Web Gateway Multiple Vulnerabilities...

47

V-093: Symantec PGP Desktop Buffer Overflows Let Local Users Gain Elevated  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment of EnergyProgram2-26TheUtility-Scale Wind &Apple iOS

48

T-563: Red Hat Directory Server Bugs Let Local Users Gain Elevated  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of Energy Strain Rate4SuperhardSuspectEnginesSystems

49

U-068:Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyTheTwo New Energy Storage6 (07/03) OMBFirmwareVulnerability

50

Actinide Thermodynamics at Elevated Temperatures  

SciTech Connect (OSTI)

The postclosure chemical environment in the proposed Yucca Mountain repository is expected to experience elevated temperatures. Predicting migration of actinides is possible if sufficient, reliable thermodynamic data on hydrolysis and complexation are available for these temperatures. Data are scarce and scattered for 25 degrees C, and nonexistent for elevated temperatures. This collaborative project between LBNL and PNNL collects thermodynamic data at elevated temperatures on actinide complexes with inorganic ligands that may be present in Yucca Mountain. The ligands include hydroxide, fluoride, sulfate, phosphate and carbonate. Thermodynamic parameters of complexation, including stability constants, enthalpy, entropy and heat capacity of complexation, are measured with a variety of techniques including solvent extraction, potentiometry, spectrophotometry and calorimetry

Friese, Judah I.; Rao, Linfeng; Xia, Yuanxian; Bachelor, Paula P.; Tian, Guoxin

2007-11-16T23:59:59.000Z

51

Determination of optimal gains for constrained controllers  

SciTech Connect (OSTI)

In this report, we consider the determination of optimal gains, with respect to a certain performance index, for state feedback controllers where some elements in the gain matrix are constrained to be zero. Two iterative schemes for systematically finding the constrained gain matrix are presented. An example is included to demonstrate the procedures.

Kwan, C.M.; Mestha, L.K.

1993-08-01T23:59:59.000Z

52

U-230: Sudo on Red Hat Enterprise Linux %postun Symlink Flaw...  

Broader source: Energy.gov (indexed) [DOE]

0: Sudo on Red Hat Enterprise Linux %postun Symlink Flaw Lets Local Users Gain Elevated Privileges U-230: Sudo on Red Hat Enterprise Linux %postun Symlink Flaw Lets Local Users...

53

JC3 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

formerly known as the License Management Console. February 23, 2011 T-563: Red Hat Directory Server Bugs Let Local Users Gain Elevated Privileges and Remote and Local Users Deny...

54

JC3 Bulletin Archive | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

formerly known as the License Management Console. February 23, 2011 T-563: Red Hat Directory Server Bugs Let Local Users Gain Elevated Privileges and Remote and Local Users Deny...

55

JC3 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Arbitrary Code A vulnerability was reported in HP SiteScope. September 20, 2012 U-264: Apple OS X Lets Remote Users Execute Arbitrary Code and Local Users Gain Elevated Privileges...

56

JC3 Bulletin Archive | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Arbitrary Code A vulnerability was reported in HP SiteScope. September 20, 2012 U-264: Apple OS X Lets Remote Users Execute Arbitrary Code and Local Users Gain Elevated Privileges...

57

U-084: Cisco Digital Media Manager Lets Remote Authenticated...  

Broader source: Energy.gov (indexed) [DOE]

authenticated user can gain elevated privileges on the target system. PLATFORM: Cisco Digital Media Manager: Version(s) 5.22 and prior, 5.2.3 ABSTRACT: The system does not...

58

A new bed elevation dataset for Greenland  

E-Print Network [OSTI]

A new bed elevation dataset for Greenland J. L. Bamber 1 ,al. : A new bed elevation dataset for Greenland Howat, I. M.al. : A new bed elevation dataset for Greenland Fig. 3. (a)

2013-01-01T23:59:59.000Z

59

Florida Billboards Elevate Renewable Energy Education | Department...  

Broader source: Energy.gov (indexed) [DOE]

Florida Billboards Elevate Renewable Energy Education Florida Billboards Elevate Renewable Energy Education July 9, 2010 - 10:26am Addthis A wind turbine tops a Lamar Advertising...

60

Optimization Online - Lot sizing with inventory gains  

E-Print Network [OSTI]

Apr 27, 2006 ... Abstract: This paper introduces the single item lot sizing problem with inventory gains. This problem is a generalization of the classical single...

Hamish Waterer

2006-04-27T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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

Experimental Determination of the Gain Distribution of an Avalanche Photodiode at Low Gains  

E-Print Network [OSTI]

A measurement system for determining the gain distributions of avalanche photodiodes (APDs) in a low gain range is presented. The system is based on an ultralow-noise charge--sensitive amplifier and detects the output carriers from an APD. The noise of the charge--sensitive amplifier is as low as 4.2 electrons at a sampling rate of 200 Hz. The gain distribution of a commercial Si APD with low average gains are presented, demonstrating the McIntyre theory in the low gain range.

Kenji Tsujino; Makoto Akiba; Masahide Sasaki

2008-12-04T23:59:59.000Z

62

Gaines County Solid Waste Management Act (Texas)  

Broader source: Energy.gov [DOE]

This Act establishes the Gaines County Solid Waste Management District, a governmental body to develop and carry out a regional water quality protection program through solid waste management and...

63

Method and system for edge cladding of laser gain media  

DOE Patents [OSTI]

A gain medium operable to amplify light at a gain wavelength and having reduced transverse ASE includes an input surface and an output surface opposing the input surface. The gain medium also includes a central region including gain material and extending between the input surface and the output surface along a longitudinal optical axis of the gain medium. The gain medium further includes an edge cladding region surrounding the central region and extending between the input surface and the output surface along the longitudinal optical axis of the gain medium. The edge cladding region includes the gain material and a dopant operable to absorb light at the gain wavelength.

Bayramian, Andrew James; Caird, John Allyn; Schaffers, Kathleen Irene

2014-03-25T23:59:59.000Z

64

Energy Gaining Windows for Residential Buildings Jesper Kragh, Assistant Professor,  

E-Print Network [OSTI]

season. It is assumed that in northern cold climates all of the solar gain during the heating season can profiles, solar gain, net energy gain, low energy houses SUMMARY: This paper presents some of the research buildings. The net energy gain of windows is the solar gain minus the heat loss integrated over the heating

65

Capital gains tax treatment and the cattleman  

E-Print Network [OSTI]

Major Subject: Agricultural Economics CAPITAL GAINS TAX TREATMENT AND THE CATTLEMAN A Thesis by M I LTDN EDWARD R I STE R Approved as to style and content by: airman o ommi e Dr. Ronald R. Kay Head o D artment Dr. John opkin Mem er Dr. Donald... R. Levi e er Dr. Howard Hesby December 1976 ABSTRACT Capital Gains Tax Treatment and the Catt leman. (December 1976) Milton Edward Rister, B. S. , Texas ASM University Chairman of Advisory Committee: Or. Ronald D. Kay The federal tax...

Rister, M. Edward

1976-01-01T23:59:59.000Z

66

Gainful Employment Programs Guidance January 2012  

E-Print Network [OSTI]

with the following information on our GE programs: · Name and Classification of Instructional Program (CIP) code1 Gainful Employment Programs Guidance January 2012 Eric R. Pedersen, Associate Vice Chancellor Background On October 29, 2010, and June 13, 2011, the Department of Education (ED) published final

Pantaleone, Jim

67

Gain International Work Experience in China  

E-Print Network [OSTI]

Gain International Work Experience in China www.StudyCLI.org "The CLI internship gave me a huge boost both personally and professionally. At 21 years old, I've lived in China and can speak basic city of Guilin, China. CLIinternsengageinadynamicrangeofprojects: Y Establishnewrelationshipswith

Virginia Tech

68

Columbia University Opportunities to Gain Experience  

E-Print Network [OSTI]

Columbia University Opportunities to Gain Experience There are myriad ways to build experience Sciences at Columbia University offers on-campus research opportunities for the summer term Dec. 13 - March careereducation.columbia.edu Join LionSHARE ­ CCE's internship/job board Double Discovery Center Volunteer

Shepard, Kenneth

69

Columbia University Opportunities to Gain Experience  

E-Print Network [OSTI]

Columbia University Opportunities to Gain Experience There are so many ways to build experience The Columbia University Office of Government and Community Affairs provides assistance to undergraduates.edu/academics/research/science Summer Undergraduate Research Fellowship The Department of Biological Sciences at Columbia University

Hone, James

70

Columbia University Opportunities to Gain Experience  

E-Print Network [OSTI]

Columbia University Opportunities to Gain Experience There are so many ways to build experience Program The Columbia University Office of Government and Community Affairs provides assistance.edu/academics/research/science Summer Undergraduate Research Fellowship The Department of Biological Sciences at Columbia University

Hone, James

71

FEMA - National Flood Insurance Program Elevation Certificate...  

Open Energy Info (EERE)

and Instructions Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: FEMA - National Flood Insurance Program Elevation Certificate and Instructions...

72

Roof Coating Procedures and Their Productivity Gains  

E-Print Network [OSTI]

benefit of the installation of different roof coating technologies and comparable application procedures of these technologies are ambiguous. The focal point of this research is to determine the effective correlation between various commercially... available roof coatings, and productivity gains associated with these energy saving strategies. This type of situation is evidenced in the justification of energy rebates distributed by Florida Power & Light in exchange for the application of Energy Star...

Bonaby, J.; Schaub, D.

2006-01-01T23:59:59.000Z

73

Gaines, Michigan: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to: navigation, search Equivalent URIFrontier,JumpGahanna, Ohio: EnergyGaines, Michigan:

74

GainSpan Corporation | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Power Basics (TheEtelligenceGainSpan Corporation Jump to: navigation, search

75

Survey of Gain-Scheduling Analysis & Design WE.Leithead  

E-Print Network [OSTI]

ranging from aerospace to process control. Despite the wide application of gain-scheduling controllers of gain-scheduling controllers and a diverse academic literature relating to gain- scheduling extendingSurvey of Gain-Scheduling Analysis & Design D.J.Leith WE.Leithead Department of Electronic

Duffy, Ken

76

Effects of Gain Changes on RPM Performance  

SciTech Connect (OSTI)

The mission of the U.S. Department of Energy/National Nuclear Security Administration's (DOE/NNSA's) Office of the Second Line of Defense (SLD) is to strengthen the capability of foreign governments to deter, detect, and interdict the illicit trafficking of special nuclear and other radioactive materials across international borders and through the global maritime shipping system. The goal of this mission is to reduce the probability of these materials being fashioned into a weapon of mass destruction or radiological dispersal device that could be used against the United States or its international partners. This goal is achieved primarily through the installation and operation of radiation detection equipment at border crossings, airports, seaports, and other strategic locations around the world. In order to effectively detect the movement of radioactive material, the response of these radiation detectors to various materials in various configurations must be well characterized. Oak Ridge National Laboratory (ORNL) investigated two aspects of Radiation Portal Monitor (RPM) settings, based on a preliminary investigation done by the Los Alamos National Laboratory (LANL): source-to-detector distance effect on amplifier gain and optimized discriminator settings. This report discusses this investigation. A number of conclusions can be drawn from the ORNL testing. First, for increased distance between the source and the detector, thus illuminating the entire detector rather than just the center of the detector (as is done during detector alignments), an increase in gain may provide a 5-15% increase in sensitivity (Fig. 4). However, increasing the gain without adjusting the discriminator settings is not recommended as this makes the monitor more sensitive to electronic noise and temperature-induced fluctuations. Furthermore, if the discriminators are adjusted in relation to the increase in gain, thus appropriately discriminating against electronic noise, the sensitivity gains are less than 5% (Fig. 6). ORNL does not consider this slight increase in sensitivity to be a worthwhile pursuit. Second, increasing the ULD will increase sensitivity a few percent (Fig. 7); however, it is not clear that the slight increase in sensitivity is worth the effort required to make the change (e.g., reliability, cost, etc.). Additionally, while the monitor would be more sensitive to HEU, it would also be more sensitive to NORM. Third, the sensitivity of the system remains approximately the same whether it is calibrated to a small source on contact or a large source far away (Fig. 6). This affirms that no changes to the existing calibration procedure are necessary.

Lousteau, Angela L [ORNL; York, Robbie Lynn [ORNL; Livesay, Jake [ORNL

2012-03-01T23:59:59.000Z

77

Gaining Energy Perspective | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdf Flash2006-53.pdf0.pdfCost SavingsEnergy GETEMGolden FieldGaining Energy

78

Gaining creative control over semiconductor nanowires  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun with Big Sky Learning Fun with Big SkyDIII-DRMR LSU/CAMD|Gaining creative

79

Women @ Energy: Linda Gaines | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from theDepartment of Dept.| WEATHERIZATION5Iski WomenKerstinGaines Women @ Energy:

80

A new bed elevation dataset for Greenland  

E-Print Network [OSTI]

and bed data set for the Greenland ice sheet 1. Measure-bed elevation dataset for Greenland J. L. Bamber 1 , J. A.face mass balance of the Greenland ice sheet revealed by

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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

Boulder County- Elevations Energy Loans Program (Colorado)  

Broader source: Energy.gov [DOE]

The Elevations Energy Loan can be used to finance a wide variety of efficiency and renewable energy projects in homes and businesses. Homes and businesses located in Boulder County or the City and...

82

Gain Scheduled Control Using the Dual Youla Parameterization  

E-Print Network [OSTI]

Stability is a critical issue in gain-scheduled control problems in that the closed loop system may not be stable during the transitions between operating conditions despite guarantees that the gain-scheduled controller stabilizes the plant model...

Chang, Young Joon

2011-08-08T23:59:59.000Z

83

Effects of internal gain assumptions in building energy calculations  

SciTech Connect (OSTI)

The utilization of direct solar gains in buildings can be affected by operating profiles, such as schedules for internal gains, thermostat controls, and ventilation rates. Building energy analysis methods use various assumptions about these profiles. The effects of typical internal gain assumptions in energy calculations are described. Heating and cooling loads from simulations using the DOE 2.1 computer code are compared for various internal-gain inputs: typical hourly profiles, constant average profiles, and zero gain profiles. Prototype single-family-detached and multi-family-attached residential units are studied with various levels of insulation and infiltration. Small detached commercial buildings and attached zones in large commercial buildings are studied with various levels of internal gains. The results of this study indicate that calculations of annual heating and cooling loads are sensitive to internal gains, but in most cases are relatively insensitive to hourly variations in internal gains.

Christensen, C.; Perkins, R.

1981-01-01T23:59:59.000Z

84

TRADE COSTS AND THE GAINS FROM TRADE IN CROP AGRICULTURE  

E-Print Network [OSTI]

costs, trade liberalization. JEL codes: F18, Q17, Q54. Although the theoretical case for the gains from

Tullos, Desiree

85

Power/Privilege Definitions  

E-Print Network [OSTI]

Major; People's Institute for Survival and Beyond, New Orleans 2. Power is the ability to define reality and to convince other people that it is their definition. ~ Dr. Wade Nobles 3. Power is the capacity to act. 4 different cultures. [JL] RACISM Racism is race prejudice plus power [See Racist]. People's Institute calls

Sheridan, Jennifer

86

Design of Gain-Scheduled Strictly Positive Real Controllers  

E-Print Network [OSTI]

Design of Gain-Scheduled Strictly Positive Real Controllers Using Numerical Optimization the linear SPR controllers, which compose the gain-scheduled controller. Second, we formulate the optimization problem associ- ated with the gain-scheduled controller itself. Restricting our in- vestigation

Damaren, Christopher J.

87

Incidence and spread of insects from bucket elevator leg boots.  

E-Print Network [OSTI]

??In commercial grain elevators and feed mills, the boot and pit areas contribute to commingling of insects with grain that moves through the elevator leg. (more)

Tilley, Dennis Ray

2013-01-01T23:59:59.000Z

88

Electric top drives gain wide industry acceptance  

SciTech Connect (OSTI)

Since its introduction, the top drive drilling system has gained acceptance as a productive and safe method for drilling oil and gas wells. Originally, the system was used mostly for offshore and higher cost land drilling, and it had to be installed as a permanent installation because of its enormous weight and size. Essentially, a top drive replaces the kelly and rotary table as the means of rotating drillpipe on oil, gas and geothermal rigs and is considered to be 15% to 40% more efficient than a kelly drive. Top drive systems allow the operator to drill and maintain directional orientation for triple stands and provide tripping efficiency because of the ability to ream and circulate with triple stands, to reduce the risk of stuck pipe or lost wells, and to improve well control and pipe handling safety. The paper describes electric top drives with DC motors, top drives with AC motors, top drives with permanent magnet motors, and top drives with permanent magnet brushless synchronous motors.

Riahi, M.L.

1998-05-01T23:59:59.000Z

89

SOLID WOOD PRODUCTS EFFECTS OF ELEVATED AND  

E-Print Network [OSTI]

SOLID WOOD PRODUCTS EFFECTS OF ELEVATED AND HIGH-TEMPERATURE SCHEDULES ON NARP IN SOUTHERN YELLOW-temperature (ET) from ET and HT schedules. and a high-temperature (HT) schedule. Wood properties including juvenile wood content, density, ring count, largest knot area, presence of pith, moisture content

90

Climatic change at high elevation sites  

SciTech Connect (OSTI)

A Workshop on climatic change at high elevation sites was held September 11-15, 1995 in Wengen, Switzerland. The meeting was sponsored by both U.S. (Department of Energy, National Science Foundation and National Oceanic & Atmospheric Administration) and European (Swiss National Science Foundation, European Science Foundation, Swiss Federal Institute of Technology) agencies. The goals of the workshop were to (1) focus the attention of the world climate community on the existence of unique high elevation geophysical records around the world, (2) highlight the value of these observing sites for climate change detection efforts and to help insure the continued support of governments and of relevant institutions in the maintenance of these high elevation data gathering efforts, (3) discuss and evaluate climatic trends that may be present in these records, and to compare the information with available paleoenvironmental records of glaciers, tree-rings and varved sediments from the alpine zones, and (4) discuss and evaluate information about elevational differences in current and projected greenhouse-gas induced climatic changes in coupled General Circulation Models.

Dr. Henry F. Diaz

1998-07-23T23:59:59.000Z

91

Gain properties of dye-doped polymer thin films  

E-Print Network [OSTI]

The demonstration of an electrically pumped organic laser remains a major issue of organic optoelectronics for several decades. Nowadays, hybrid pumping seems a promising compromise where the organic material is optically pumped by an electrically pumped inorganic device on chip. This technical solution requires therefore an optimization of the organic gain medium under optical pumping. Here, we report a detailed study of gain features of dye-doped polymer thin films, in particular we introduce the gain efficiency $K$, in order to facilitate comparison between material and experimental conditions. First, we measure the bulk gain by the means of a pump-probe setup, and then present in details several factors which modify the actual gain of the layer, namely the confinement factor, the pump polarization, the molecular anisotropy, and the re-absorption. The usual model to evaluate the gain leads to an overestimation by more than one order of magnitude, which stresses the importance to design the devices accordin...

Gozhyk, I; Rabbani, H; Djellali, N; Forget, S; Chenais, S; Ulysse, C; Brosseau, A; Gauvin, S; Zyss, J; Lebental, M

2014-01-01T23:59:59.000Z

92

Use of a photonic crystal for optical amplifier gain control  

DOE Patents [OSTI]

An optical amplifier having a uniform gain profile uses a photonic crystal to tune the density-of-states of a gain medium so as to modify the light emission rate between atomic states. The density-of-states of the gain medium is tuned by selecting the size, shape, dielectric constant, and spacing of a plurality of microcavity defects in the photonic crystal. The optical amplifier is particularly useful for the regeneration of DWDM signals in long optical fibers.

Lin, Shawn-Yu (Albuquerque, NM); Fleming, James G. (Albuquerque, NM); El-Kady, Ihab (Albuquerque, NM)

2006-07-18T23:59:59.000Z

93

Recommended practices in elevated temperature design: A compendium of breeder reactor experiences (1970-1986): An overview  

SciTech Connect (OSTI)

Significant experiences have been accumulated in the establishment of design methods and criteria applicable to the design of Liquid Metal Fast Breeder Reactor (LMFBR) components. The Subcommittee of the Elevated Temperature Design under the Pressure Vessel Research Council (PVRC) has undertaken to collect, on an international basis, design experience gained, and the lessons learned, to provide guidelines for next generation advanced reactor designs. This paper shall present an overview and describe the highlights of the work.

Wei, B.C.; Cooper, W.L. Jr.; Dhalla, A.K.

1987-09-01T23:59:59.000Z

94

ORISE: CDC Travelers' Health Mobile App, Designed by ORISE, Gains...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Can I Eat This? Mobile App Helps International Travelers Make Safe Dining Choices CDC Travelers' Health app, designed by ORISE, gains attention on multiple websites How ORISE is...

95

Elevated-Temperature Tribology of Metallic Materials  

SciTech Connect (OSTI)

The wear of metals and alloys takes place in many forms, and the type of wear that dominates in each instance is influenced by the mechanics of contact, material properties, the interfacial temperature, and the surrounding environment. The control of elevated-temperature friction and wear is important for applications like internal combustion engines, aerospace propulsion systems, and metalworking equipment. The progression of interacting, often synergistic processes produces surface deformation, subsurface damage accumulation, the formation of tribolayers, and the creation of free particles. Reaction products, particularly oxides, play a primary role in debris formation and microstructural evolution. Chemical reactions are known to be influenced by the energetic state of the exposed surfaces, and that surface energy is in turn affected by localized deformation and fracture. At relatively low temperatures, work-hardening can occur beneath tribo-contacts, but exposure to high temperatures can modify the resultant defect density and grain structure to affect the mechanisms of re-oxidation. As research by others has shown, the rate of wear at elevated temperatures can either be enhanced or reduced, depending on contact conditions and nature of oxide layer formation. Furthermore, the thermodynamic driving force for certain chemical reactions is moderated by kinetics and microstructure. The role of deformation, oxidation, and tribo-corrosion in the elevated temperature tribology of metallic alloys will be exemplified by three examples involving sliding wear, single-point abrasion, and repetitive impact plus slip.

Blau, Peter Julian [ORNL

2010-01-01T23:59:59.000Z

96

Chemical Impact of Elevated CO2on Geothermal Energy Production...  

Broader source: Energy.gov (indexed) [DOE]

Chemical Impact of Elevated CO2on Geothermal Energy Production Chemical Impact of Elevated CO2on Geothermal Energy Production This is a two phase project to assess the geochemical...

97

Review of health and productivity gains from better IEQ  

SciTech Connect (OSTI)

The available scientific data suggest that existing technologies and procedures can improve indoor environmental quality (IEQ) in a manner that significantly increases productivity and health. While there is considerable uncertainty in the estimates of the magnitudes of productivity gains that may be obtained, the projected gains are very large. For the U.S., the estimated potential annual savings and productivity gains are $6 to $14 billion from reduced respiratory disease, $2 to $4 billion from reduced allergies and asthma, $10 to $30 billion from reduced sick building syndrome symptoms, and $20 to $160 billion from direct improvements in worker performance that are unrelated to health. Productivity gains that are quantified and demonstrated could serve as a strong stimulus for energy efficiency measures that simultaneously improve the indoor environment.

Fisk, William J.

2000-08-01T23:59:59.000Z

98

Gain scheduling for geometrically nonlinear flexible space structures  

E-Print Network [OSTI]

A gain-scheduling approach for the control of geometrically nonlinear structures is developed. The objective is to improve performance over current linear design techniques that are applied to the same control problem. The ...

Yung, Jeremy Hoyt, 1971-

2002-01-01T23:59:59.000Z

99

Sensitivity of the South Asian monsoon to elevated and non-elevated heating  

E-Print Network [OSTI]

for the South Asian monsoon via a ``sensible-heat-driven air-pump''. In their proposed mech- anism, sensible from cold and dry extratropical air or by providing a source of elevated heating. Here we show heat fluxes from mountain slopes produce rising motion that draws surrounding air toward the mountains

Kuang, Zhiming

100

Optical Filter Design: Gain Analysis and Tolerance Analysis  

E-Print Network [OSTI]

OPTICAL FILTER DESIGN: GAIN ANALYSIS AND TOLERANCE ANALYSIS A Thesis by VIVEK VANDRASI Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of MASTER OF SCIENCE August... 2010 Major Subject: Electrical Engineering OPTICAL FILTER DESIGN: GAIN ANALYSIS AND TOLERANCE ANALYSIS A Thesis by VIVEK VANDRASI Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements...

Vandrasi, Vivek

2011-10-21T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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

Traction sheave elevator, hoisting unit and machine space  

DOE Patents [OSTI]

Traction sheave elevator consisting of an elevator car moving along elevator guide rails, a counterweight moving along counterweight guide rails, a set of hoisting ropes (3) on which the elevator car and counterweight are suspended, and a drive machine unit (6) driving a traction sheave (7) acting on the hoisting ropes (3) and placed in the elevator shaft. The drive machine unit (6) is of a flat construction. A wall of the elevator shaft is provided with a machine space with its open side facing towards the shaft, the essential parts of the drive machine unit (6) being placed in the space. The hoisting unit (9) of the traction sheave elevator consists of a substantially discoidal drive machine unit (6) and an instrument panel (8) mounted on the frame (20) of the hoisting unit.

Hakala, Harri (Hyvinkaa, FI); Mustalahti, Jorma (Hyvinkaa, FI); Aulanko, Esko (Kerava, FI)

2000-01-01T23:59:59.000Z

102

Elevated temperature forming method and preheater apparatus  

DOE Patents [OSTI]

An elevated temperature forming system in which a sheet metal workpiece is provided in a first stage position of a multi-stage pre-heater, is heated to a first stage temperature lower than a desired pre-heat temperature, is moved to a final stage position where it is heated to a desired final stage temperature, is transferred to a forming press, and is formed by the forming press. The preheater includes upper and lower platens that transfer heat into workpieces disposed between the platens. A shim spaces the upper platen from the lower platen by a distance greater than a thickness of the workpieces to be heated by the platens and less than a distance at which the upper platen would require an undesirably high input of energy to effectively heat the workpiece without being pressed into contact with the workpiece.

Krajewski, Paul E; Hammar, Richard Harry; Singh, Jugraj; Cedar, Dennis; Friedman, Peter A; Luo, Yingbing

2013-06-11T23:59:59.000Z

103

Investigation of gain kinetics in a CO gas dynamic laser  

SciTech Connect (OSTI)

A detailed experimental investigation of small-signal gain in a CO gasdynamic laser, produced in a shock tunnel is presented. Gains of the P/sub 7/(3) transition were measured at a distance 44 cm downstream from the nozzle throat for various CO--Ar and CO--N/sub 2/--Ar mixtures at stagnation temperatures of 1800/sup 0/--3800 /sup 0/K and stagnation pressures of 18--40 atm. Optimum gas temperatures and compositions were observed. Laser oscillations were observed simultaneously in two cavities located at 44 and 56 cm downstream from the nozzle throat. The experimental data on gain have been compared with a numerical model. A quantitatively good argeement between calculations and experiments was found which permits the utilization of the mathematical model for a better understanding of the processes involved in the laser operation. Small signal gains and multi-line laser power outputs were calculated along the nozzle for various initial conditions. Calculations indicate that maximum gain and maximum power occur for P/sub 3/(4)-P/sub 5/(4) lines at a stagnation temperature of about 3000 /sup 0/K and a gas composition of CO:Ar = 20:80.

Stricker, J.; Tilleman, M.

1982-06-01T23:59:59.000Z

104

Determining Mountaintop Mining Locations in West Virginia Using Elevation Datasets  

E-Print Network [OSTI]

Determining Mountaintop Mining Locations in West Virginia Using Elevation Datasets Danny Rowland Haskell Indian Nations University Image from: http://www.colorado.edu/geography/cartpro/cartography2/spring2006/syphers.../projects/westvirginia/whatis.htm Image from: http://washingtonindependent.com/49008/congress-takes-on-mountaintop-mining Mountaintop Mining Operation 2 Elevation datasets: NED & SRTM West Virginia NED SRTM Elevation Change Over ~30 Year Period 20021970s SRTM Subtracted from...

Rowland, Danny

2009-11-18T23:59:59.000Z

105

Information Gain Based Dimensionality Selection for Classifying Text Documents  

SciTech Connect (OSTI)

Selecting the optimal dimensions for various knowledge extraction applications is an essential component of data mining. Dimensionality selection techniques are utilized in classification applications to increase the classification accuracy and reduce the computational complexity. In text classification, where the dimensionality of the dataset is extremely high, dimensionality selection is even more important. This paper presents a novel, genetic algorithm based methodology, for dimensionality selection in text mining applications that utilizes information gain. The presented methodology uses information gain of each dimension to change the mutation probability of chromosomes dynamically. Since the information gain is calculated a priori, the computational complexity is not affected. The presented method was tested on a specific text classification problem and compared with conventional genetic algorithm based dimensionality selection. The results show an improvement of 3% in the true positives and 1.6% in the true negatives over conventional dimensionality selection methods.

Dumidu Wijayasekara; Milos Manic; Miles McQueen

2013-06-01T23:59:59.000Z

106

Elevated temperature biaxial fatigue. Final Report  

SciTech Connect (OSTI)

A 3 year experimental program for studying elevated temperature biaxial fatigue of a nickel based alloy Hastelloy-X has been completed. A new high temperature fatigue test facility with unique capabilities has been developed. Effort was directed toward understanding multiaxial fatigue and correlating the experimental data to the existing theories of fatigue failure. The difficult task of predicting fatigue lives for nonproportional loading was used as an ultimate test for various life prediction methods being considered. The primary means of reaching improved understanding were through several critical nonproportional loading experiments. The direction of cracking observed on failed specimens was also recorded and used to guide the development of the theory. Cyclic deformation responses were permanently recorded digitally during each test. It was discovered that the cracking mode switched from primarily cracking on the maximum shear planes at room temperature to cracking on the maximum normal strain planes at 649 C. In contrast to some other metals, loading path in nonproportional loading had little effect on fatigue lives. Strain rate had a small effect on fatigue lives at 649 C. Of the various correlating parameters the modified plastic work and octahedral shear stress were the most successful.

Jordan, E.H.

1985-10-01T23:59:59.000Z

107

alpine elevation gradient: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Niche expansion leads to small-scale adaptive divergence along an elevation gradient in a medium of the Environment, University of California, Los Angeles, CA 90095, USA Niche...

108

Chemical Impact of Elevated CO2on Geothermal Energy Production  

Broader source: Energy.gov (indexed) [DOE]

Chemical Impact of Elevated CO 2 on Geothermal Energy Production Principal Investigator Susan Carroll Lawrence Livermore National Lab Track Name May 18-20, 2010 This presentation...

109

Importance of Elevation and Temperature Inversions for the Interpretat...  

Open Energy Info (EERE)

Importance of Elevation and Temperature Inversions for the Interpretation of Thermal Infrared Satellite Images Used in Geothermal Exploration Jump to: navigation, search OpenEI...

110

High-frequency absorption and gain in superlattices: Semiquasistatic approach  

E-Print Network [OSTI]

We consider a generation and an amplification of THz radiation in semiconductor superlattices under the action of microwave pump field. Electrons belonging to a single miniband of the superlattice interact quasistatically with the pump field and dynamically with a signal THz field. Within this semiquasistic approach we derive elegant difference formulas describing absorption (gain) of the weak THz signal. We present an instructive geometric interpretation of the absorption formulas which allows a search of optimum conditions for the gain employing only a simple qualitative analysis. Our theoretical findings contribute to the development of sources and detectors of THz radiation that are using nonlinear electric properties of semiconductor superlattices.

A. V. Shorokhov; K. N. Alekseev

2006-02-08T23:59:59.000Z

111

E-Print Network 3.0 - active life gained Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ues. Inverting Gain As with voltage-feedback op amps, the ratio of the feedback... resistor to the gain-setting resistor determines the voltage gain in current-feedback op amp...

112

Reliability Gain of Network Coding in Lossy Wireless Networks  

E-Print Network [OSTI]

Reliability Gain of Network Coding in Lossy Wireless Networks Majid Ghaderi Department of Computer that network coding improves network reliability by reducing the number of packet retransmissions in lossy networks. However, the extent of the reliability benefit of network coding is not known. This paper

Massachusetts at Amherst, University of

113

Design of a variable gain amplifier for an ultrawideband receiver  

E-Print Network [OSTI]

and the analog VGA is formed by a digital-to-analog converter and an exponential voltage generator. The gain of the VGA varies dB-linearly from 0 to 52 dB with respect to the control voltage. The VGA is operated in open loop with a bandwidth greater than 500 MHz...

Krishnanji, Sivasankari

2005-11-01T23:59:59.000Z

114

Generalized solar load ratio correlation for direct gain buildings  

SciTech Connect (OSTI)

A generalized solar load ratio correlation has been developed for direct gain buildings by generating relationships between the correlation parameters and two fundamental design parameters. The first design parameter is the steady state conductance of the solar aperture, U/sub c/. The second is the effective heat capacity of the solar zone, EHC.

Wray, W.O.; Best, E.D.

1986-01-01T23:59:59.000Z

115

1 INTRODUCTION Alternative energy sources have increasingly gained  

E-Print Network [OSTI]

1 INTRODUCTION Alternative energy sources have increasingly gained the interest for governments it is required, is a major concern for alternative energy systems. Profits and environmental benefits, research institutes, academia, and industry in order to advance the penetration of sustainable energy

Sandborn, Peter

116

Gain effect waveguide optical amplifiers for Si microphotonics  

E-Print Network [OSTI]

(cont.) Er-based gain. We reported the first infrared photoluminescence PL study of Er?O? and found a 7 ms lifetime at 4 K, attributed to a metastable FCC or HCP phase. We showed the thermodynamically stable BCC crystal ...

Saini, Sajan, 1973-

2004-01-01T23:59:59.000Z

117

Extractive Institutions and Gains From Trade: Evidence from Colonial Africa  

E-Print Network [OSTI]

. First, because of the low population densities of French Africa and the high cost of labor rela- tive (2013) tests this hypothesis in the African context showing that lower population density is correlatedExtractive Institutions and Gains From Trade: Evidence from Colonial Africa Federico Tadei A common

Faraon, Andrei

118

PiPe dreams? Jobs Gained, Jobs Lost  

E-Print Network [OSTI]

Petroleum Institute that, if constructed, TransCanada's proposed Keystone XL (KXL) pipeline will generatePiPe dreams? Jobs Gained, Jobs Lost by the ConstruCtion of Keystone XL a rePort by Corne, and Induced) Jobs from Keystone XL 26 KXL Will Have Minor Impact on Unemployment Levels 27 Four Ways Keystone

Danforth, Bryan Nicholas

119

Original article Interactive effects of elevated CO2, O3,  

E-Print Network [OSTI]

Original article Interactive effects of elevated CO2, O3, and soil water deficit on spring wheat of elevated carbon dioxide (CO2), ozone (O3), and soil water deficit on spring wheat (Triticum aestivum L. cv consisting of two O3levels (ambient and 1.5-times ambient) in combination with two CO2levels (ambient

Paris-Sud XI, Université de

120

Original article Responses to elevated atmospheric CO2 concentration  

E-Print Network [OSTI]

Original article Responses to elevated atmospheric CO2 concentration and nitrogen supply of Quercus* School of Forest Resources and Conservation, University of Florida, 326 Newins-Ziegler Hall, Gainesville. Elevated [CO2] increased biomass production only in the high-N treatment. Fine root/foliage mass ratio

Paris-Sud XI, Universit de

Note: This page contains sample records for the topic "gain elevated privileges" 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

E-Print Network 3.0 - adaptive gain integrating Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

is based on a hybrid combination of gain scheduling, B- spline... combination of gain scheduling, B-spline approximation, variable structure control and integral control... the...

122

Representative Atmospheric Plume Development for Elevated Releases  

SciTech Connect (OSTI)

An atmospheric explosion of a low-yield nuclear device will produce a large number of radioactive isotopes, some of which can be measured with airborne detection systems. However, properly equipped aircraft may not arrive in the region where an explosion occurred for a number of hours after the event. Atmospheric conditions will have caused the radioactive plume to move and diffuse before the aircraft arrives. The science behind predicting atmospheric plume movement has advanced enough that the location of the maximum concentrations in the plume can be determined reasonably accurately in real time, or near real time. Given the assumption that an aircraft can follow a plume, this study addresses the amount of atmospheric dilution expected to occur in a representative plume as a function of time past the release event. The approach models atmospheric transport of hypothetical releases from a single location for every day in a year using the publically available HYSPLIT code. The effective dilution factors for the point of maximum concentration in an elevated plume based on a release of a non-decaying, non-depositing tracer can vary by orders of magnitude depending on the day of the release, even for the same number of hours after the release event. However, the median of the dilution factors based on releases for 365 consecutive days at one site follows a power law relationship in time, as shown in Figure S-1. The relationship is good enough to provide a general rule of thumb for estimating typical future dilution factors in a plume starting at the same point. However, the coefficients of the power law function may vary for different release point locations. Radioactive decay causes the effective dilution factors to decrease more quickly with the time past the release event than the dilution factors based on a non-decaying tracer. An analytical expression for the dilution factors of isotopes with different half-lives can be developed given the power law expression for the non-decaying tracer. If the power-law equation for the median dilution factor, Df, based on a non-decaying tracer has the general form Df=a?t?^(-b) for time t after the release event, then the equation has the form Df=e^(-?t)at^(-b) for a radioactive isotope, where ? is the decay constant for the isotope.

Eslinger, Paul W.; Lowrey, Justin D.; McIntyre, Justin I.; Miley, Harry S.; Prichard, Andrew W.

2014-03-03T23:59:59.000Z

123

Radio interferometric gain calibration as a complex optimization problem  

E-Print Network [OSTI]

Recent developments in optimization theory have extended some traditional algorithms for least-squares optimization of real-valued functions (Gauss-Newton, Levenberg-Marquardt, etc.) into the domain of complex functions of a complex variable. This employs a formalism called the Wirtinger derivative, and derives a full-complex Jacobian counterpart to the conventional real Jacobian. We apply these developments to the problem of radio interferometric gain calibration, and show how the general complex Jacobian formalism, when combined with conventional optimization approaches, yields a whole new family of calibration algorithms, including those for the polarized and direction-dependent gain regime. We further extend the Wirtinger calculus to an operator-based matrix calculus for describing the polarized calibration regime. Using approximate matrix inversion results in computationally efficient implementations; we show that some recently proposed calibration algorithms such as StefCal and peeling can be understood...

Smirnov, Oleg

2015-01-01T23:59:59.000Z

124

Work and energy gain of heat-pumped quantized amplifiers  

E-Print Network [OSTI]

We investigate heat-pumped single-mode amplifiers of quantized fields in high-Q cavities based on non-inverted two-level systems. Their power generation is shown to crucially depend on the capacity of the quantum state of the field to accumulate useful work. By contrast, the energy gain of the field is shown to be insensitive to its quantum state. Analogies and differences with masers are explored.

David Gelbwaser-Klimovsky; Robert Alicki; Gershon Kurizki

2013-10-09T23:59:59.000Z

125

Gaining Top Management Support for Energy Conservation Programs  

E-Print Network [OSTI]

GAINING TOP MANAGEMENT SUPPORT FOR ENERGY CONSERVATION PROGRAMS W. F. Kenney Exxon Chemical Company Florham Park, New Jersey ABSTRACT Sometimes seemingly attractive energy con 1 have attempted to generalize these considerations servation... in your efforts. References [1] W. F. Kenney, IECTC 1983 "Some Observations I on Energy Efficiency and Capital Costs." 17 ESL-IE-84-04-04 Proceedings from the Sixth Annual Industrial Energy Technology Conference Volume I, Houston, TX, April 15...

Kenney, W. F.

1984-01-01T23:59:59.000Z

126

Gain-assisted superluminal light propagation via incoherent pump field  

E-Print Network [OSTI]

We investigate the dispersion and the absorption properties of a weak probe field in a three-level Lambda-type atomic system. We use just an incoherent field for controlling the group velocity of light. It is shown that the slope of dispersion changes from positive to negative just with changing the intensity of the indirect incoherent pumping field. Gain-assisted superluminal light propagation appears in this system. No laser field is used in the pumping processes.

M. Mahmoudi; S. Worya Rabiei; L. Safari; M. Sahrai

2008-08-03T23:59:59.000Z

127

A very high frequency CMOS Variable Gain Amplifier  

E-Print Network [OSTI]

of the VGA output signal . . . . . . . . . 80 Bandwidth with different frequency compensation circuits bias current at 22dB gain setting. . . 84 XIV VGA comparison . . . 88 LIST OF FIGURE FIGURE I 2", 3 and 4'" order sigma-delta modulator SNR vs. input... level . . . . Page 2 Block diagram of a direct conversion receiver. 3 Single transistor transconductor 4 Differential pair 5 Source degeneration amplifier. 6 Four-quadrant multiplier basic architectures . . . . . . . . 10 7 Multiplier as a...

Tan, Siang Tong

2012-06-07T23:59:59.000Z

128

High gain preamplifier based on optical parametric amplification  

DOE Patents [OSTI]

A high-gain preamplifier based on optical parametric amplification. A first nonlinear crystal is operatively connected to a second nonlinear crystal. A first beam relay telescope is operatively connected to a second beam relay telescope, to the first nonlinear crystal, and to the second nonlinear crystal. A first harmonic beamsplitter is operatively connected to a second harmonic beamsplitter, to the first nonlinear crystal, to the second nonlinear crystal, to the first beam relay telescope, and to the second beam relay telescope.

Jovanovic, Igor; Bonner, Randal A.

2004-08-10T23:59:59.000Z

129

Incremental cooling load determination for passive direct gain heating systems  

SciTech Connect (OSTI)

This paper examines the applicability of the National Association of Home Builders (NAHB) full load compressor hour method for predicting the cooling load increase in a residence, attributable to direct gain passive heating systems. The NAHB method predictions are compared with the results of 200 hour-by-hour simulations using BLAST and the two methods show reasonable agreement. The degree of agreement and the limitations of the NAHB method are discussed.

Sullivan, P.W.; Mahone, D.; Fuller, W.; Gruber, J.; Kammerud, R.; Place, W.; Andersson, B.

1981-05-01T23:59:59.000Z

130

Spatially Similar Practice Immediately Following Motor Sequence Learning Eliminates Offline Gains  

E-Print Network [OSTI]

early during motor sequence learning but highlight the sensitivity of offline gains to task practice order....

Handa, Atul

2012-11-30T23:59:59.000Z

131

Structural Reliability of Bridges Elevated with Steel Pedestals  

E-Print Network [OSTI]

Overheight vehicle impact to bridge decks is a major problem in the transportation networks in the United States. An important factor that causes this problem is inadequate vertical clearance of bridges. Using steel pedestals to elevate bridge decks...

Bisadi, Vahid 1980-

2012-09-19T23:59:59.000Z

132

City and County of Denver- Elevations Energy Loans Program (Colorado)  

Broader source: Energy.gov [DOE]

The Elevations Energy Loan can be used to finance a wide variety of efficiency and renewable energy projects in homes and businesses. Homes and businesses located in Boulder County or the City and...

133

Systems simulation of oil additives to grain at terminal elevators  

E-Print Network [OSTI]

SYSTEMS SIMULATION OF OIL ADDITIVES TO GRAIN AT TERMINAL ELEVATORS A Thesis by Kerry James Goforth Submitted to the Graduate College of Texas A8M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May... 1985 Major Subject: Agricultural Engineering SYSTEMS SIMULATION OF OIL ADDITIVES TO GRAIN AT TERMINAL ELEVATORS A Thesis by KERRY J. GOFORTH Approved as to style and content by: Calvin B. Parne 1, Jr. (Chairman of Committee) tto R. Kunze...

Goforth, Kerry James

1985-01-01T23:59:59.000Z

134

Effects of elevated CO2 , nitrogen deposition, and decreased species diversity on foliar fungal plant disease  

E-Print Network [OSTI]

. Keywords: biodiversity, ecosystem, elevated carbon dioxide, nitrogen enrichment, parasites, plant pathogensEffects of elevated CO2 , nitrogen deposition, and decreased species diversity on foliar fungal Three components of global change, elevated CO2 , nitrogen addition, and decreased plant species

Crews, Stephen

135

"Elevated heat pump" hypothesis for the aerosolmonsoon hydroclimate link: "Grounded" in observations?  

E-Print Network [OSTI]

"Elevated heat pump" hypothesis for the aerosolmonsoon hydroclimate link: "Grounded April 2010; published 18 August 2010. [1] The viability of the elevated heat pump hypothesis, S., and M. Bollasina (2010), "Elevated heat pump" hypothesis for the aerosolmonsoon hydroclimate

Nigam, Sumant

136

Performance of MOV Stem Lubricants at Elevated Temperatures  

SciTech Connect (OSTI)

This paper documents the results of recent tests sponsored by the U. S. Nuclear Regulatory Commission (NRC) and performed by the Idaho National Engineering and Environmental Laboratory (INEEL). These tests address the effectiveness of the lubricant used on the threaded portion of the valve stem, where the stem nut turns on the stem. Recent testing indicates that an elevated temperature environment can lead to significant increases in the friction coefficient at the stem/stem-nut interface. Most valve actuator qualification tests are performed at room temperature. Similarly, in-service tests are run at ambient plant temperatures, usually 70 to 100F. Since design conditions can lead to valve operating temperatures in the 200 to 300F range, it is important to know whether a temperature-induced increase in friction at the stem/stem-nut interface will prevent the required operation of critical valves. Lubricant aging is another phenomenon that might have deleterious effects on the thrust output of a valve actuator. Laboratory experience and field experience both indicate that after long periods in elevated temperature environments, the lubricants may lose their lubrication qualities. The scope of the current test program includes testing of five different lubricants on four different valve stems. Pending completion of the testing, results of the tests conducted using two of the four stems are discussed. The test series included collection of baseline data at room temperature, single step temperature tests where the temperature of the test setup was elevated directly to 250F, and step testing where the temperature was elevated in steps to 130, 190, and 250F, then returned to 70F. All greases tested showed evidence of physical change after elevated temperature tests. Except for one particular lubricant, all of the greases tested showed increased coefficients of friction at elevated temperatures. Numerous other preliminary conclusions are presented. Recommendations for future research in the area of aged valve stem lubricant performance at elevated temperatures are also presented.

DeWall, Kevin George; Nitzel, Michael Everett; Watkins, John Clifford

2001-07-01T23:59:59.000Z

137

Rangeland -- Plant responses to elevated CO sub 2  

SciTech Connect (OSTI)

Several broad conclusions which can be drawn from the work that was accomplished during the first 3-year phase of the study is described. In prairie ecosystems dominated by C{sub 4} grasses, it is likely that elevated atmospheric CO{sub 2} will increase ecosystem level productivity, with a greater increase in belowground productivity. The increased productivity will primarily result from increased water use efficiency due to the anti-transpirant action of CO{sub 2}. Fumigation chambers are directly confounded with elevated CO{sub 2} effects, in that both reduce evapotranspiration. The reduced evapotranspiration of the fumigation chamber is primarily through reduced wind speeds and reduced radiation. In very dry years, fumigation chamber effects are negligible, but in years with normal precipitation, chamber effects and elevated CO{sub 2} effects are essentially equal with respect to reduced evapotranspiration effects. Increased production under elevated CO{sub 2} results in reduced nitrogen concentration in the herbage and increased fiber concentrations. Consequently, digestibility of the herbage is reduced, and microbial degradation of surface litter and soil organic matter is slowed. On the negative side, ruminant productivity will likely be reduced substantially, but increased carbon storage in the soil may buffer against future rise in atmospheric CO{sub 2}. Tallgrass prairie will not likely change greatly in botanical composition, since the C{sub 4} dominants responded to elevated CO{sub 2} more than the C{sub 3} subdominants.

Owensby, C.E.; Coyne, P.I.; Ham, J.M.; Parton, W.; Rice, C.; Auen, L.M.; Adam, N.

1992-01-01T23:59:59.000Z

138

Electrical and Optical Gain Lever Effects in InGaAs Double Quantum Well Diode Lasers  

SciTech Connect (OSTI)

In multisection laser diodes, the amplitude or frequency modulation (AM or FM) efficiency can be improved using the gain lever effect. To study gain lever, InGaAs double quantum well (DQW) edge emitting lasers have been fabricated with integrated passive waveguides and dual sections providing a range of split ratios from 1:1 to 9:1. Both the electrical and the optical gain lever have been examined. An electrical gain lever with greater than 7 dB enhancement of AM efficiency was achieved within the range of appropriate DC biasing currents, but this gain dropped rapidly outside this range. We observed a 4 dB gain in the optical AM efficiency under non-ideal biasing conditions. This value agreed with the measured gain for the electrical AM efficiency under similar conditions. We also examined the gain lever effect under large signal modulation for digital logic switching applications. To get a useful gain lever for optical gain quenched logic, a long control section is needed to preserve the gain lever strength and a long interaction length between the input optical signal and the lasing field of the diode must be provided. The gain lever parameter space has been fully characterized and validated against numerical simulations of a semi-3D hybrid beam propagation method (BPM) model for the coupled electron-photon rate equation. We find that the optical gain lever can be treated using the electrical injection model, once the absorption in the sample is known.

Pocha, M D; Goddard, L L; Bond, T C; Nikolic, R J; Vernon, S P; Kallman, J S; Behymer, E M

2007-01-03T23:59:59.000Z

139

Progress on achieving the ICF conditions needed for high gain  

SciTech Connect (OSTI)

Progress during the past two years has moved us much closer to demonstrating the scientific and technological requirements for high gain ICF in the laboratory. This progress has been made possible by operating at the third harmonic of 1..mu..m light which dramatically reduces concern about hot electrons and by advances in diagnostics such as 100 ps x-ray framing cameras which greatly increase the data available from each experiment. Making use of many of these new capabilities, major improvements in confinement conditions have been achieved for ICF implosions. In particular, in an optimized hohlraum on Nova, radiation driven implosions with convergence ratio in excess of 30 (volume compression /approximately/3 /times/ 10/sup 4/) have performed essentially as predicted by spherical implosion calculations. This paper presents these results as well as examples of advances in several other areas and discusses the implications for the future of ICF with lasers and heavy ion beam drivers. 8 refs., 10 figs.

Lindl, J.D.

1988-12-23T23:59:59.000Z

140

Relative Gain Monitoring of the GlueX Calorimeters  

SciTech Connect (OSTI)

The relative gain of the photodetectors for the GlueX Barrel and Forward calorimeters will be monitored using modular LED driver systems. The BCAL system consists of a global controller that feeds power, bias voltage and trigger signals to 96 local controllers situated at the ends of the 48 BCAL modules, which drive 40 LEDs associated with the 40 light guides at the end of each module. The FCAL system consists also of a global controller, a local controller for each acrylic quadrant covering the face of the FCAL, and ten 4-LED pulser boards per local controller connected in a star configuration along the edges of the acrylic panes. The respective systems are currently being installed on the detectors and their tested performance is presented herein.

Anassontzis, Efstratios G. [JLAB/National and Kapodestrian University of Athens (Greece); Ioannou, P. [National and Kapodestrian University of Athens (Greece); Kourkoumelis, C. [National and Kapodestrian University of Athens (Greece); Vasileiadis, G. [National and Kapodestrian University of Athens (Greece); Voulgaris, G. [National and Kapodestrian University of Athens (Greece); Kappos, E. [Symmetron Electronic Applications, Gerakas (Greece); Beattie, T. [University of Regina, Saskatchewan (Canada); Krueger, S. [University of Regina, Saskatchewan (Canada); Lolos, G. J. [University of Regina, Saskatchewan (Canada); Papandreou, Z. [University of Regina, Saskatchewan (Canada); Semenov, A. Yu. [University of Regina, Saskatchewan (Canada); Frye, John M. [Indiana Univ., Bloomington, IN (United States); Leckey, John P. [Indiana Univ., Bloomington, IN (United States); Shepherd, Matt [Indiana Univ., Bloomington, IN (United States); Bogart, T. [JLAB/CNU, Newport News, VA (United States); Lawrence, David W. [JLAB, Newport News, VA (United States); Smith, Elton S. [JLAB, Newport News, VA (United States)

2014-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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

E-Print Network 3.0 - annual weight gain Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 4 5 6 7 8 0 0.5 1 1.5 2 x 10 -3 Lag (trials) RegressionWeight... on effective Gain Landscape The optimal strategy, maximizing expected gain, requires the subject to shift... of...

142

40 ELR 11106 ENVIRONMENTAL LAW REPORTER 11-2010 Gaining Ground: Wetlands,  

E-Print Network [OSTI]

40 ELR 11106 ENVIRONMENTAL LAW REPORTER 11-2010 Gaining Ground: Wetlands, Hurricanes .5% dis- count rate). Marine waters, wetlands, swamps, agricultural lands, and forests provide natural goods and services . The 1 . David Batker et al ., Gaining Ground: Wetlands, Hurricanes

Vermont, University of

143

Investigation of spectrally broad gain multiple-width quantum well material for colliding pulse  

E-Print Network [OSTI]

and MWQW devices, are shown in Fig. 1. At zero net modal gain, confined material gain is equal just below 1:5 kA cm?2 ; the net modal gain contribution is zero at 1560 nm, corresponding contributed to the zero net modal gain before the narrow wells at a current density of 2­3 kA cm?2 : The 6

144

Room temperature broadband terahertz gains in graphene heterostructures based on inter-layer radiative transitions  

SciTech Connect (OSTI)

We exploit inter-layer radiative transitions to provide gains to amplify terahertz waves in graphene heterostructures. This is achieved by properly doping graphene sheets and aligning their energy bands so that the processes of stimulated emissions can overwhelm absorptions. We derive an expression for the gain estimation and show the gain is insensitive to temperature variation. Moreover, the gain is broadband and can be strong enough to compensate the free carrier loss, indicating graphene based room temperature terahertz lasers are feasible.

Tang, Linlong [Key Laboratory of High Energy Density Physics and Technology, College of Physics and Technology, Sichuan University, Chengdu, 610064 (China); Chongqing institute of green and intelligent technology, Chinese Academy of Sciences, Chongqing, 401122 (China); Du, Jinglei, E-mail: dujl@scu.edu.cn [Key Laboratory of High Energy Density Physics and Technology, College of Physics and Technology, Sichuan University, Chengdu, 610064 (China); Shi, Haofei, E-mail: shi@cigit.ac.cn; Wei, Dongshan; Du, Chunlei, E-mail: cldu@cigit.ac.cn [Chongqing institute of green and intelligent technology, Chinese Academy of Sciences, Chongqing, 401122 (China)

2014-10-15T23:59:59.000Z

145

EXTENSION CENTER FOR COMMUNITY VITALITY Continuing the Trend: The Brain Gain  

E-Print Network [OSTI]

EXTENSION CENTER FOR COMMUNITY VITALITY Continuing the Trend: The Brain Gain of the Newcomers Fellow, University of Minnesota Extension Center for Community Vitality #12;Brain Gain 2010 i Report Reviewers: Neil Linscheid Scott Chazdon Continuing the Trend: The Brain Gain of the Newcomers A GENERATIONAL

Minnesota, University of

146

Appropriate Realisation of MIMO Gain-Scheduled Controllers W.E. Leithead  

E-Print Network [OSTI]

Appropriate Realisation of MIMO Gain-Scheduled Controllers D.J.Leith W.E. Leithead Department characteristics of a controller designed by the gain-scheduling approach can be strongly dependent realisations for general MIMO gain-scheduled controllers. An extended local linear equivalence condition

Duffy, Ken

147

Interpolated versus Polytopic Gain Scheduling Control Laws for Fin/Rudder Roll Stabilisation of Ships  

E-Print Network [OSTI]

Interpolated versus Polytopic Gain Scheduling Control Laws for Fin/Rudder Roll Stabilisation be done through the use of gain-scheduling (GS) control law. In this study, a GS-control law is obtained and a desired stabilisation quality factor. Gain scheduling is a way to obtain parameter dependent controllers

Paris-Sud XI, Université de

148

A GAIN SCHEDULED CONTROL LAW FOR FIN/RUDDER ROLL STABILISATION OF SHIPS  

E-Print Network [OSTI]

A GAIN SCHEDULED CONTROL LAW FOR FIN/RUDDER ROLL STABILISATION OF SHIPS Hervé Tanguy , Guy Lebret leads to a gain-scheduled control law. The synthesis is based on multi-objective optimisation stabilisation; H control; Gain Scheduled Control; polytopic representation; LMI. 1. INTRODUCTION A major

Paris-Sud XI, Université de

149

Chemical Impact of Elevated CO2on Geothermal Energy Production  

Broader source: Energy.gov [DOE]

This is a two phase project to assess the geochemical impact of CO2on geothermal energy production by: analyzing the geochemistry of existing geothermal fields with elevated natural CO2; measuring realistic rock-water rates for geothermal systems using laboratory and field-based experiments to simulate production scale impacts.

150

Elevated Fis Expression Enhances Recombinant Protein Production in  

E-Print Network [OSTI]

Elevated Fis Expression Enhances Recombinant Protein Production in Escherichia coli Richard Richins is discussed. A small DNA bending protein, Fis, which has been shown to activate rRNA syn- thesis upon a nutrient upshift, was overexpressed in E. coli strain W3110 carrying vector pUCR1. Overexpres- sion of Fis

Chen, Wilfred

151

Thru-thickness bending stress distribution at elevated temperatures  

E-Print Network [OSTI]

the plate??s thickness decreased when the fabrication process was carried out at elevated temperatures. When steel exceeds a strain of 10 to 16 percent during the fabrication process, the plate becomes susceptible to cracking. This strain limit was exceeded...

Christian, Lee Conner

2005-08-29T23:59:59.000Z

152

NEST-SITESELECTIONAND NESTINGSUCCESSOF CAVITY-NESTINGBIRDSIN HIGH ELEVATION  

E-Print Network [OSTI]

NEST-SITESELECTIONAND NESTINGSUCCESSOF CAVITY-NESTINGBIRDSIN HIGH ELEVATION FORESTDRAINAGES that characterized successful and unsuccessful nest sites, nest sites vs. random sites, and differences among coexisting species of cavity- nesting birds for 356 nests in central Arizona. Live and, more commonly, dead

Martin, Thomas E.

153

Effects of elevated temperatures on mechanical properties of concrete containing  

E-Print Network [OSTI]

Effects of elevated temperatures on mechanical properties of concrete containing haematite and A. Beycioglu5 Concretes containing different proportions of haematite (15, 30, 45 and 60%) were of concretes were determined according to ASTM C39 and ASTM C469. A rule based Mamdani type fuzzy logic model

North Texas, University of

154

GAiN: Distributed Array Computation with Python  

SciTech Connect (OSTI)

Scientific computing makes use of very large, multidimensional numerical arrays - typically, gigabytes to terabytes in size - much larger than can fit on even the largest single compute node. Such arrays must be distributed across a "cluster" of nodes. Global Arrays is a cluster-based software system from Battelle Pacific Northwest National Laboratory that enables an efficient, portable, and parallel shared-memory programming interface to manipulate these arrays. Written in and for the C and FORTRAN programming languages, it takes advantage of high-performance cluster interconnections to allow any node in the cluster to access data on any other node very rapidly. The "numpy" module is the de facto standard for numerical calculation in the Python programming language, a language whose use is growing rapidly in the scientific and engineering communities. numpy provides a powerful N-dimensional array class as well as other scientific computing capabilities. However, like the majority of the core Python modules, numpy is inherently serial. Our system, GAiN (Global Arrays in NumPy), is a parallel extension to Python that accesses Global Arrays through numpy. This allows parallel processing and/or larger problem sizes to be harnessed almost transparently within new or existing numpy programs.

Daily, Jeffrey A.

2009-04-24T23:59:59.000Z

155

Enhancing optical gains in Si nanocrystals via hydrogenation and cerium ion doping  

SciTech Connect (OSTI)

We report optical gain enhancements in Si nanocrystals (Si-NCs) via hydrogenation and Ce{sup 3+} ion doping. Variable stripe length technique was used to obtain gains. At 0.3?W/cm{sup 2} pumping power density of pulsed laser, net gains were observed together with gain enhancements after hydrogenation and/or Ce{sup 3+} ion doping; gains after loss corrections were between 89.52 and 341.95?cm{sup ?1}; and the photoluminescence (PL) lifetime was found to decrease with the increasing gain enhancement. At 0.04?W/cm{sup 2} power density, however, no net gain was found and the PL lifetime increased with the increasing PL enhancement. The results were discussed according to stimulated and spontaneous excitation and de-excitation mechanisms of Si-NCs.

Wang, Dong-Chen; Li, Yan-Li; Song, Sheng-Chi; Guo, Wen-Ping; Lu, Ming, E-mail: minglu55@fudan.edu.cn [Department of Optical Science and Engineering, and Shanghai Ultra-Precision Optical Manufacturing Engineering Center, Fudan University, Shanghai 200433 (China); Chen, Jia-Rong [Department of Optical Science and Engineering, and Shanghai Ultra-Precision Optical Manufacturing Engineering Center, Fudan University, Shanghai 200433 (China); School of Information Engineering, Guizhou Minzu University, Guiyang 550025 (China)

2014-07-28T23:59:59.000Z

156

Friction Tests in Magnesium Tube Hydroforming at Elevated Temperatures  

SciTech Connect (OSTI)

In metal forming, lubricants have a variety of functions. The top priority is usually reduction of friction in order to increase the formability of the materials and reduce tool wear. Because magnesium alloys have very poor formability at room temperature, it is essential to manufacture a part from Magnesium alloys at elevated temperatures. The aim of this paper is to present a friction test method to evaluate the performance of different kinds of lubricants and determine their coefficients of friction at elevated temperatures in tube hydroforming of magnesium alloys. A self-designed experimental apparatus is used to carry out the experiments of friction tests. The coefficient of friction between the tube and die at guiding zone is determined. The effects of the internal pressure, the axial feeding velocity and temperatures on the friction forces and coefficients of friction for different lubricants are discussed.

Hwang, Yeong-Maw; Wang, Kuo-Hsing; Kuo, Tsung-Yu [National Sun Yat-Sen University-Department of Mechanical and Electro-mechanical Engineering, No.70, Lien-Hai Rd., Kaohsiung, Taiwan (China)

2011-05-04T23:59:59.000Z

157

Corrosion resistant coatings suitable for elevated temperature application  

DOE Patents [OSTI]

The present invention relates to corrosion resistance coatings suitable for elevated temperature applications, which employ compositions of iron (Fe), chromium (Cr), nickel (Ni) and/or aluminum (Al). The compositions may be configured to regulate the diffusion of metals between a coating and a substrate, which may then influence coating performance, via the formation of an inter-diffusion barrier layer. The inter-diffusion barrier layer may comprise a face-centered cubic phase.

Chan, Kwai S. (San Antonio, TX); Cheruvu, Narayana Sastry (San Antonio, TX); Liang, Wuwei (Austin, TX)

2012-07-31T23:59:59.000Z

158

A near infrared organic photodiode with gain at low bias voltage  

SciTech Connect (OSTI)

We demonstrate an organic photodiode with near infrared optical response out to about 1100 run with a gain of {approx}10 at 1000 run under 5V reverse bias. The diodes employ a soluble naphthalocyanine with a peak absorption coefficient of {approx}10{sup 5} cm{sup -1} at 1000 nm. In contrast to most organic photodiodes, no exciton dissociating material is used. At zero bias, the diodes are inefficient with an external quantum efficiency of {approx} 10{sup -2}. In reverse bias, large gain occurs and is linear with bias voltage above 4V. The observed gain is consistent with a photoconductive gain mechanism.

Campbell, Ian H [Los Alamos National Laboratory; Crone, Brian K [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

159

E-Print Network 3.0 - antipsychotic-induced weight gain Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

movement disorders (AIMDs) have been collectively known as extrapyramidal syndromes (EPS... seen with typical antipsychotics (e.g., weight gain, hyperlipidemia, and...

160

E-Print Network 3.0 - antipsychotics-induced weight gain Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

movement disorders (AIMDs) have been collectively known as extrapyramidal syndromes (EPS... seen with typical antipsychotics (e.g., weight gain, hyperlipidemia, and...

Note: This page contains sample records for the topic "gain elevated privileges" 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

Problemstellung "Brain Drain" bzw. "Brain Gain" in der Region Niedersterreich-Mitte.  

E-Print Network [OSTI]

??Die vorliegende Diplomarbeit befasst sich mit dem Thema des Brain Drain und Brain Gain in der Region Niedersterreich Mitte. Unter "Brain Drain" versteht man die (more)

Binder, Paul

2012-01-01T23:59:59.000Z

162

Post-Genomics Nanotechnology Is Gaining Momentum: Nanoproteomics and Applications in Life Sciences  

E-Print Network [OSTI]

Post-Genomics Nanotechnology Is Gaining Momentum: Nanoproteomics and Applications in Life Sciences of nanotechnology applications, including nanoporous structures, functionalized nanoparticles, quantum dots

Tan, Weihong

163

E-Print Network 3.0 - acute st-segment elevation Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Impact of age on treatment and outcomes in ST-elevation myocardial infarction Summary: , Armstrong PW, et al. Acute coronary care in the elderly, part II: ST-segment-elevation...

164

Bond Strength Degradation for CFRP and Steel reinforcing Bars in Concrete at Elevated Temperature  

E-Print Network [OSTI]

tendon as compared with steel prestressing wire. The results of transient elevated temperature bond pullout and tensile strength tests on CFRP tendons and steel prestressing wire are presented and discussed, and show that bond failure at elevated...

Maluk, Cristian; Bisby, Luke; Terrasi, Giovanni; Green, Mark

2011-03-01T23:59:59.000Z

165

Estimated impacts of climate warming on Californias high-elevation hydropower  

E-Print Network [OSTI]

on high elevation hydropower generation in CaliforniasCalifornias high-elevation hydropower Kaveh Madani Jay R.Abstract Californias hydropower system is composed of high

Madani, Kaveh; Lund, Jay R.

2010-01-01T23:59:59.000Z

166

Soil CO2 flux and photoautotrophic community composition in high-elevation, `barren' soil  

E-Print Network [OSTI]

Soil CO2 flux and photoautotrophic community composition in high-elevation, `barren' soil Kristen R of Colorado, Campus Box 450, Boulder, CO 80309, USA. Summary Soil-dominated ecosystems, with little-elevation, subnival zone soil (i.e. elevations higher than the zone of continuous vegetation), the structure

Hammerton, James

167

White Pine Blister Rust in High-Elevation White Pines: Screening for Simply-Inherited,  

E-Print Network [OSTI]

White Pine Blister Rust in High-Elevation White Pines: Screening for Simply________________ Recent concern about survival and recovery of high- elevation white pine ecosystems has returned white rust- resistance mechanisms in high-elevation white pines, including whitebark (Pinus albicaulis

168

Climate Warming and Adaptability of High-Elevation Hydropower Generation in California  

E-Print Network [OSTI]

Climate Warming and Adaptability of High-Elevation Hydropower Generation in California Kaveh Madani's high-elevation hydropower system is composed of more than 150 power plants. Most of the associated to winter, the adaptability of high-elevation hydropower system to new climatic conditions is in question

Keller, Arturo A.

169

SOLAR HEAT GAIN THROUGH FENESTRATION SYSTEMS CONTAINING SHADING: PROCEDURES FOR ESTIMATING  

E-Print Network [OSTI]

SOLAR HEAT GAIN THROUGH FENESTRATION SYSTEMS CONTAINING SHADING: PROCEDURES FOR ESTIMATING that with a drastic simplifying assumption these methods can be used to calculate system solar-optical properties and solar heat gain coefficients for arbitrary glazing systems, while requiring limited data about

170

SOLAR HEAT GAIN THROUGH FENESTRATION SYSTEMS CONTAINING SHADING: SUMMARY OF PROCEDURES FOR  

E-Print Network [OSTI]

SOLAR HEAT GAIN THROUGH FENESTRATION SYSTEMS CONTAINING SHADING: SUMMARY OF PROCEDURES that with a drastic simplifying assumption these methods can be used to calculate system solar-optical properties and solar heat gain coefficients for arbitrary glazing systems, while requiring limited data about

171

PRODUCTIVITY GAINS IN U.S. FISHERIES . FREDERICK W. BELL AND RICHARD K. KINOSHITA I  

E-Print Network [OSTI]

PRODUCTIVITY GAINS IN U.S. FISHERIES . FREDERICK W. BELL AND RICHARD K. KINOSHITA I ABSTRACT Changes in productivity or annual landings per fisherman help to determine the economic welfare of the fishing industry. Although a study of productivity gains in various U.S. fishing fleets over the last 20

172

A low power, high dynamic-range, broadband variable gain amplifier for an ultra wideband receiver  

E-Print Network [OSTI]

gain steps. The gain control scheme includes fine tuning (2dB/step) by changing the bias voltage of the proposed programmable current mirror, and coarse tuning (14dB/step) by switching on/off the source degeneration resistors in the differential pairs...

Chen, Lin

2007-09-17T23:59:59.000Z

173

Study in Indonesia and gain credit towards your degree! DevelopmentStudiesImmersionProgram ACICIS  

E-Print Network [OSTI]

Study in Indonesia and gain credit towards your degree! DevelopmentStudiesImmersionProgram ACICIS an internship in Indonesia! © Photograph by James Walsh #12;w w w . a c i c i s . m u r d o c h . e d u . a u development issues in Indonesia while also gaining im- portant practical skills related to advocacy

174

Study in Indonesia and gain credit towards your degree! Unleash your creativity...  

E-Print Network [OSTI]

Study in Indonesia and gain credit towards your degree! Unleash your creativity... Spend a semester at Indonesia's premiere institution for visual and performing arts... StudytheArtsinIndonesia Study in Indonesia and gain credit towards your degree! ACICIS #12;w w w . a c i c i s . m u r d o c h . e d u . a u

175

Gain Scheduling Control Design of an Erbium-Doped Fibre Amplifier by Pump Compensation  

E-Print Network [OSTI]

Gain Scheduling Control Design of an Erbium-Doped Fibre Amplifier by Pump Compensation Min Ding amplifier's (EDFA's) dynamics. We demonstrate a gain scheduling scheme on a PID controller that minimizes- pensation. The scheduled controller requires only three easily accessible parameters: the total input power

Pavel, Lacra

176

Robust Gain Scheduling techniques for Adaptive control Patrice Antoinette and Gilles Ferreres  

E-Print Network [OSTI]

Robust Gain Scheduling techniques for Adaptive control Patrice Antoinette and Gilles Ferreres for implementing the LFT controller is reduced. This controller is scheduled as a function of the parameters) and of gain- scheduled control (LPV methods) has been (much) less investigated, see for instance [10], [11

177

Coat Color and Solar Heat Gain in Animals Author(s): Glenn E. Walsberg  

E-Print Network [OSTI]

when exposed to solar radiation than do light surfaces. For ani- mals such as birds or mammalsCoat Color and Solar Heat Gain in Animals Author(s): Glenn E. Walsberg Source: BioScience, Vol. 33://www.jstor.org #12;Coat Color and Solar Heat Gain in Animals Glenn E. Walsberg The relationbetween coat color

Cavitt, John F.

178

Optical gain from the direct gap transition of Ge-on-Si at room temperature  

E-Print Network [OSTI]

We report direct band gap optical gain of tensile strained n+ epitaxial Ge-on-Si at room temperature, which confirms that band-engineered Ge-on-Si is a promising gain medium for monolithic optical amplifiers and lasers on Si.

Liu, Jifeng

179

Gain-scheduled `1 -optimal control for boiler-turbine dynamics  

E-Print Network [OSTI]

, into the mechanical energy acting on the turbine and generator. The steam generated in the boiler system servesGain-scheduled `1 -optimal control for boiler-turbine dynamics with actuator saturation Pang; accepted 2 June 2003 Abstract This paper presents a gain-scheduled approach for boiler-turbine controller

Shamma, Jeff S.

180

INFLUENCE OF ELEVATED OZONE AND CARBON DIOXIDE ON INSECT DENSITIES.  

SciTech Connect (OSTI)

The combustion of fossil fuels is profoundly altering the chemical composition of the atmosphere. Beginning with the Industrial Revolution, the concentration of carbon dioxide in the atmosphere has increased from approximately 280 to 370 {micro}l l{sup -1} in 2004, and it is expected to exceed 550 {micro}l l{sup -1} by 2050. Tropospheric ozone has risen even more rapidly than CO{sub 2} and average summer concentrations in the Northern Hemisphere are expected to continue to increase by 0.5-2.5% per year over the next 30 years. Although elevated CO{sub 2} stimulates photosynthesis and productivity of terrestrial ecosystems, ozone (O{sub 3}) is deleterious. In addition to directly affecting the physiology and productivity of crops, increased concentrations of tropospheric CO{sub 2} and O{sub 3} are predicted to lower the nutritional quality of leaves, which has the potential to increase herbivory as insects eat more to meet their nutritional demands. We tested the hypothesis that changes in tropospheric chemistry affect the relationship between plants and insect herbivores by changing leaf quality. The susceptibility to herbivory of soybean grown in elevated CO{sub 2} or O{sub 3} was examined using free air gas concentration enrichment (SoyFACE). FACE technology has the advantage that plants are cultivated under realistic field conditions with no unwanted alteration of microclimate or artificial constraints on the insect community.

DELUCIA, E.; DERMODY, O.; O'NEILL, B.; ALDEA, M.; HAMILTON, J.; ZANGERL, A.; ROGER, A.; BERENBAUM, M.

2005-01-05T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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

Electric shock and elevated EMF levels due to triplen harmonics  

SciTech Connect (OSTI)

The increasing use of single phase rectifiers for electric power conversion in residential applications increases harmonic load on utility systems. Many papers have analyzed the effect of these loads on power quality and equipment loadability. However, there are two more critical concerns for harmonic loads served phase to neutral on multi-grounded wye systems. Triplen harmonics, particularly the third, add in the neutral and have little diversity between loads. The higher neutral currents may cause significant problems. Neutral to earth voltages will increase near the substations which could increase stray voltage complaints. The additional neutral current on three phase lines will elevate EMF levels especially in the fringe areas. This paper provides fundamental understanding of triplen harmonic influence on stray voltage and EMF related to multi-grounded wye electric distribution systems.

Tran, T.Q.; Conrad, L.E.; Stallman, B.K. [PSI Energy, Inc., Plainfield, IN (United States)] [PSI Energy, Inc., Plainfield, IN (United States)

1996-04-01T23:59:59.000Z

182

Friction Properties of Molybdenum Alloyed Steel at Elevated Temperatures  

SciTech Connect (OSTI)

The high-temperature properties of steel surface can be improved by molybdenum surface alloying. Molybdenzing was carried out on carbon steel in the multi-function double glow plasma surface alloying furnace. The friction and wear tests were conducted on a high temperature ball-on-disk tribometer under the temperature of 25 deg. C{approx}600 deg. C. The contents of alloy element varied with alloyed layer were detected by SEM attached with EDS. The molybdenized layer is composed of the deposited layer and diffused layer. The micro-hardness of alloyed layer decreases from HV650 on the top layer to HV240. The friction coefficient of molybdenized layer decreases from 0.5{approx}0.6 to 0.2{approx}0.3 and wear rate decreases by 20% at elevated temperature after molybdenizing.

Li Jianliang; Xiong Dangsheng [Department of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094 (China); Wu Hongyan [College of Math and Physics, Nanjing University of Information and Technology, Nanjing, 210044 (China)

2011-01-17T23:59:59.000Z

183

Characteristics of mercury desorption from sorbents at elevated temperatures  

SciTech Connect (OSTI)

This study investigated the dynamic desorption characteristics of mercury during the thermal treatment of mercury-loaded sorbents at elevated temperatures under fixed-bed operations. Experiments were carried out in a 25.4 mm ID quartz bed enclosed in an electric furnace. Elemental mercury and mercuric chloride were tested with activated carbon and bauxite. The experimental results indicated that mercury desorption from sorbents was strongly affected by the desorption temperature and the mercury-sorbent pair. Elemental mercury was observed to desorb faster than mercuric chloride and activated carbon appeared to have higher desorption limits than bauxite at low temperatures. A kinetic model considering the mechanisms of surface equilibrium, pore diffusion and external mass transfer was proposed to simulate the observed desorption profiles. The model was found to describe reasonably well the experimental results.

Ho, T.C.; Yang, P.; Kuo, T.H.; Hopper, J.R. [Lamar Univ., Beaumont, TX (United States). Dept. of Chemical Engineering] [Lamar Univ., Beaumont, TX (United States). Dept. of Chemical Engineering

1998-12-31T23:59:59.000Z

184

Elastic constants of single crystal Hastelloy X at elevated temperatures  

SciTech Connect (OSTI)

An acoustic time of flight technique is described in detail for measuring the elastic constants of cubic single crystals that allows for the constants to be determined at elevated temperature. Although the overall technique is not new, various aspects of the present work may prove extremely useful to others interested in finding these values, especially for aerospace materials applications. Elastic constants were determined for the nickel based alloy, Hastelloy X from room temperature to 1,000 C. Accurate elastic constants were needed as part of an effort to predict both polycrystal mechanical properties and the nature of grain induced heterogeneous mechanical response. The increased accuracy of the acoustically determined constants resulted in up to a 15% change in the predicted stresses in individual grains. These results indicate that the use of elastic single crystal constants of pure nickel as an approximation for the constants of gas turbine single crystal alloys, which is often done today, is inaccurate.

Canistraro, H.A. [Univ. of Hartford, CT (United States). Dept. of Mechanical and Audio Engineering Technology; Jordan, E.H.; Shi Shixiang [Univ. of Connecticut, Storrs, CT (United States); Favrow, L.H.; Reed, F.A. [United Technologies Research Center, East Hartford, CT (United States)

1998-07-01T23:59:59.000Z

185

Analysis of gain margins and phase margins of a nonlinear reactor control system  

SciTech Connect (OSTI)

By using the gain-phase margin tester, the parameter-plane method for the nonlinear control system is extended to frequency-domain related to gain margin and phase margin. The stability and self-excited oscillation are investigated with respect to the adjustable parameters. The useful information concerning the effect of adjustable parameters can be obtained, after the describing function curves and the boundaries of constant gain margin and constant phase margin are plotted in the parameter plane. Some interesting consequences are offered by employing the practical control system of a material testing reactor.

Chang, C.H.; Chang, M.K. (Chung Cheng Inst. of Technology, Tao-Yuan (Taiwan, Province of China))

1994-08-01T23:59:59.000Z

186

Calibration of photomultipliers gain used in the J-PET detector  

E-Print Network [OSTI]

Photomultipliers are commonly used in commercial PET scanner as devices which convert light produced in scintillator by gamma quanta from positron-electron annihilation into electrical signal. For proper analysis of obtained electrical signal, a photomultiplier gain curve must be known, since gain can be significantly different even between photomultipliers of the same model. In this article we describe single photoelectron method used for photomultipliers calibration applied for J-PET scanner, a novel PET detector being developed at the Jagiellonian University. Description of calibration method, an example of calibration curve and gain of few R4998 Hamamatsu photomultipliers are presented.

Bednarski, T; Moskal, P; Bia?as, P; Giergiel, K; Kap?on, ?; Kochanowski, A; Korcyl, G; Kowal, J; Kowalski, P; Kozik, T; Krzemie?, W; Molenda, M; Moskal, I; Nied?wiecki, Sz; Pa?ka, M; Pawlik, M; Raczy?ski, L; Rudy, Z; Salabura, P; Sharma, N G; Silarski, M; S?omski, A; Smyrski, J; Strzelecki, A; Szyma?ski, K; Wi?licki, W; Witkowski, P; Zieli?ski, M; Zo?, N

2013-01-01T23:59:59.000Z

187

Negative differential gain in quantum dot systems: Interplay of structural properties and many-body effects  

SciTech Connect (OSTI)

The saturation behaviour of optical gain with increasing excitation density is an important factor for laser device performance. For active materials based on self-organized InGaAs/GaAs quantum dots, we study the interplay between structural properties of the quantum dots and many-body effects of excited carriers in the optical properties via a combination of tight-binding and quantum-kinetic calculations. We identify regimes where either phase-space filling or excitation-induced dephasing dominates the saturation behavior of the optical gain. The latter can lead to the emergence of a negative differential material gain.

Goldmann, E., E-mail: goldmann@itp.uni-bremen.de; Jahnke, F. [Institute for Theoretical Physics, University of Bremen, Bremen 28359 (Germany); Lorke, M.; Frauenheim, T. [Bremen Center for Computational Materials Science BCCMS, University of Bremen, Bremen 28359 (Germany)

2014-06-16T23:59:59.000Z

188

E-Print Network 3.0 - age-dependent weight gain Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

search results for: age-dependent weight gain Page: << < 1 2 3 4 5 > >> 1 On the Political Mechanisms of the Environmental Kuznets Curve for Global Water Quality1 Summary:...

189

Large inherent optical gain from the direct gap transition of Ge thin films  

E-Print Network [OSTI]

The recent demonstration of Ge-on-Si diode lasers renews the interest in the unique carrier dynamics of Ge involving both direct (?) and indirect (L) valleys. Here, we report a large inherent direct gap optical gain ...

Wang, Xiaoxin

190

Extended infrared photoresponse and gain in chalcogen-supersaturated silicon photodiodes  

E-Print Network [OSTI]

Highly supersaturated solid solutions of selenium or sulfur in silicon were formed by ion implantation followed by nanosecond pulsed laser melting. n[superscript +]p photodiodes fabricated from these materials exhibit gain ...

Sullivan, Joseph Timothy

191

Mechanisms of ionizing-radiation-induced gain degradation in lateral PNP BJTs  

SciTech Connect (OSTI)

The physical mechanisms for gain degradation in laterals PNP bipolar transistors are examined experimentally and through simulation. The effect of increased surface recombination velocity at the base surface is moderated by positive oxide charge.

Schmidt, D.M.; Wu, A.; Schrimpf, R.D. [Arizona Univ., Tucson, AZ (United States), Dept. of ECE; Fleetwood, D.M. [Sandia National Labs., Albuquerque, NM (United States); Pease, R.L. [RLP Research, Inc., Albuquerque, NM (United States); Combs, W.E. [Naval Surface Warfare Center, Crane, IN (United States). Crane Div.

1996-03-01T23:59:59.000Z

192

Gain margin and phase margin analysis of a nuclear reactor control system with multiple transport lags  

SciTech Connect (OSTI)

In this paper a method for finding the boundaries of constant gain margin and phase margin of control systems with transport lags and adjustable parameters is presented. The considered systems are first modified by adding a gain-phase margin tester, then the characteristic equations are formulated, and finally the stability equations are used to find the boundaries of constant gain margin and phase margin. The main advantage of the proposed method is to obtain complete information about the effects of adjustable parameters on gain margin and phase margin and their corresponding crossover frequencies. In order to show the usefulness of the proposed method a nuclear reactor control system with multiple transport lags is chosen as one of the examples.

Chang, C.H. (Institute of Electronics, National Chiao-Tung Univ. (TW)); Han, K.W. (Chung-Shan Institute and National Chiao-Tung Univ., Hsinchu (TW))

1989-08-01T23:59:59.000Z

193

Complexity within the Air Force acquisition system gaining insight from a theory of collapse  

E-Print Network [OSTI]

Joseph Tainter's theory of societal collapse is applied in an examination of the U.S. Air Force's aircraft acquisition system in order to gain insight into the enterprise's lagging performance. Theories of collapse at both ...

Marticello, Daniel Nicholas, Jr

2012-01-01T23:59:59.000Z

194

Spend a semester in Indonesia to gain linguistic and classroom competence!  

E-Print Network [OSTI]

Spend a semester in Indonesia to gain linguistic and classroom competence! Study in Indonesia institu- tions throughout Indonesia since 1994, offering a range of study options and in-country support

195

DEMONSTRATION OF 3D EFFECTS WITH HIGH GAIN AND EFFICIENCY IN A UV FEL OSCILLATOR  

SciTech Connect (OSTI)

We report on the performance of a high gain UV FEL oscillator operating on an energy recovery linac at Jefferson Lab. The high brightness of the electron beam leads to both gain and efficiency that cannot be reconciled with a one-dimensional model. Three-dimensional simulations do predict the performance with reasonable precision. Gain in excess of 100% per pass and an efficiency close to 1/2NW, where NW is the number of wiggler periods, is seen. The laser mirror tuning curves currently permit operation in the wavelength range of 438 to 362 nm. Another mirror set allows operation at longer wavelengths in the red with even higher gain and efficiency.

Stephen Benson; George Biallas; Keith Blackburn; James Boyce; Donald Bullard; James Coleman; Cody Dickover; David Douglas; Forrest Ellingsworth; Pavel Evtushenko; Carlos Hernandez-Garcia; Christopher Gould; Joseph Gubeli; David Hardy; Kevin Jordan; John Klopf; James Kortze; Robert Legg; Matthew Marchlik; Steven Moore; George Neil; Thomas Powers; Daniel Sexton; Michelle D. Shinn; Christopher Tennant; Richard Walker; Anne Watson; Gwyn Williams; Frederick Wilson; Shukui Zhang

2011-03-01T23:59:59.000Z

196

U-142: HP Onboard Administrator Bugs Let Remote Users Gain Access...  

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

Unspecified Flaw Lets Remote Users Gain Access U-212: RSA Authentication Manager Flaws Permit Cross-Site and Cross-Frame Scripting and URL Redirection Attacks U-026: Cisco Small...

197

High gain proportional rf control stability at TESLA cavities Elmar Vogel  

E-Print Network [OSTI]

High gain proportional rf control stability at TESLA cavities Elmar Vogel Deutsches Elektronen) based on TESLA technology. Additional control loops improve the field regulation by treating repetitive loops is desirable for the strong suppression of nonpredictive and nonrepetitive disturbances. TESLA

198

Spatial Interference Mitigation for Multiple Input Multiple Output Ad Hoc Networks: MISO Gains  

E-Print Network [OSTI]

Spatial Interference Mitigation for Multiple Input Multiple Output Ad Hoc Networks: MISO Gains beamforming for a multiple input single output (MISO) ad hoc network to increase the density of successful

Paris-Sud XI, Universit de

199

E-Print Network 3.0 - avalanche gain feasibility Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

employed. 3.2.2 Gain of an avalanche photodiode. If we denote the electron ionisation... coefficient by h and the width of the depletion layer by w then the ... Source: University...

200

Gain-scheduled controller design for load-following in static space nuclear power systems  

E-Print Network [OSTI]

of variations in the fuel temperature reactivity feedback coeficient on the load-following capabilities of the SNPS. Robustness analysis results of the gain-scheduled compensator demonstrate that the proposed control concept exhibits a significant degree...

Onbasioglu, Fetiye Ozlem

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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

Optical gain and lasing from band-engineered Ge-on-Si at room temperature  

E-Print Network [OSTI]

We present theoretical modeling and experimental results of optical gain and lasing from tensile-strained, n[superscript +] Ge-on-Si at room temperature. Compatible with silicon CMOS, these devices are ideal for large-scale ...

Liu, Jifeng

202

Tuning gain and bandwidth of traveling wave tubes using metamaterial beam-wave interaction structures  

SciTech Connect (OSTI)

We employ metamaterial beam-wave interaction structures for tuning the gain and bandwidth of short traveling wave tubes. The interaction structures are made from metal rings of uniform cross section, which are periodically deployed along the length of the traveling wave tube. The aspect ratio of the ring cross sections is adjusted to control both gain and bandwidth. The frequency of operation is controlled by the filling fraction of the ring cross section with respect to the size of the period cell.

Lipton, Robert, E-mail: lipton@math.lsu.edu; Polizzi, Anthony, E-mail: polizzi@math.lsu.edu [Department of Mathematics, Louisiana State University, Baton Rouge, Louisiana 70803-4918 (United States)

2014-10-14T23:59:59.000Z

203

A circuit for gain measurement of frequency referenced digitally self tuned filters  

E-Print Network [OSTI]

A CIRCUIT FOR GAIN MEASUREMENT OF FREQUENCY REFERENCED DIGITALLY SELF TUNED FILTERS A Thesis by ROBERT WAKE COOK Submitted to the Graduate College of Texas ASSAM University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE December 1985 Major Subject: Electrical Engineering A CIRCUIT FOR GAIN MEASUREMENT OF FREQUENCY REFERENCED DIGITALLY SELF TUNED FILTERS A Thesis bv ROl3ERT WAKE COOK Approved as to style and content by: Dr. Randal! L. Geiger (Chairman...

Cook, Robert Wake

2012-06-07T23:59:59.000Z

204

Gain media edge treatment to suppress amplified spontaneous emission in a high power laser  

DOE Patents [OSTI]

A novel method and apparatus for suppressing ASE and/or parasitic oscillation modes in a laser is introduced. By roughening one or more peripheral edges of a solid-state crystal or ceramic laser gain media and by bonding such edges to a predetermined electromagnetic absorbing material arranged adjacent to the entire outer surface of the peripheral edges of the roughened laser gain media, ASE, parasitic oscillation modes and/or residual pump energy can be effectively suppressed.

Hackel, Lloyd A. (Livermore, CA); Soules, Thomas F. (Livermore, CA); Fochs, Scott N. (Livermore, CA); Rotter, Mark D. (San Ramon, CA); Letts, Stephan A. (San Ramon, CA)

2011-02-22T23:59:59.000Z

205

Gain media edge treatment to suppress amplified spontaneous emission in a high power laser  

DOE Patents [OSTI]

A novel method and apparatus for suppressing ASE and parasitic oscillation modes in a high average power laser is introduced. By roughening one or more peripheral edges of a solid-state crystal or ceramic laser gain media and by bonding such edges using a substantially high index bonding elastomer or epoxy to a predetermined electromagnetic absorbing arranged adjacent to the entire outer surface of the peripheral edges of the roughened laser gain media, ASE and parasitic oscillation modes can be effectively suppressed.

Hackel, Lloyd A. (Livermore, CA); Soules, Thomas F. (Livermore, CA); Fochs, Scott N. (Livermore, CA); Rotter, Mark D. (San Ramon, CA); Letts, Stephan A. (San Ramon, CA)

2008-12-09T23:59:59.000Z

206

Effects of finite gain-bandwidth products on switched capacitor filters  

E-Print Network [OSTI]

. 'vlav 198o Major Subject: Electrical Engineering EFFECTS OF FINITE GAIN-BANDWIDTH PRODUCTS ON SWITCHED CAPACITOR FILTERS A Thesis by FREDERIC D. MARCIANO Approved as to style and content by: o re E. Sanchez-Sinencio (Chairman of Committee... Chairman of Advisory Committee: Dr. E. Sanchez-Sinencio A methodology for the systematic study of the effects of finite gain-bandwidth products on switched capacitor filters is presented. The algorithms are established for a general structure comprising...

Marciano, Frederic D.

1985-01-01T23:59:59.000Z

207

Room location (design) in accordance with the sol-air temperature and solar heat gain  

E-Print Network [OSTI]

ROOM LOCATION (DESIGN) IN ACCORDANCE WITH THE SOL-AIR TEMPERATURE AND SOLAR HEAT GAIN A Thesis GARY LYNN PORTER Submitted to the Graduate College of Texas ASM University in parital fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1977 Major Subject: Meteorology ROOM LOCATION (DESIGN) IN ACCORDANCE WITH THE SOL-AIR TEMPERATURE AND SOLAR HEAT GAIN A Thesis by GARY LYNN PORTER Approved as to style and content by: hairman of Committee) (Head of Department) ( (Q...

Porter, Gary Lynn

1977-01-01T23:59:59.000Z

208

The Effect of Elevated Temperature on Concrete Materials and Structures - a Literature Review.  

SciTech Connect (OSTI)

The objective of this limited study was to provide an overview of the effects of elevated temperature on the behavior of concrete materials and structures. In meeting this objective the effects of elevated temperatures on the properties of ordinary Portland cement concrete constituent materials and concretes are summarized. The effects of elevated temperature on high-strength concrete materials are noted and their performance compared to normal strength concretes. A review of concrete materials for elevated-temperature service is presented. Nuclear power plant and general civil engineering design codes are described. Design considerations and analytical techniques for evaluating the response of reinforced concrete structures to elevated-temperature conditions are presented. Pertinent studies in which reinforced concrete structural elements were subjected to elevated temperatures are described.

Naus, Dan J [ORNL

2006-03-01T23:59:59.000Z

209

Digital Elevation Model, 0.5-m, Barrow Environmental Observatory, Alaska, 2012  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The dataset is a digital elevation model, DEM, of a 2km by 7km region in the vicinity of the Barrow Environmental Observatory near Barrow, Ak.

Gangodagamage, Chandana; Wilson, Cathy; Rowland, Joel

210

Digital Elevation Model, 0.5-m, Barrow Environmental Observatory, Alaska, 2012  

SciTech Connect (OSTI)

The dataset is a digital elevation model, DEM, of a 2km by 7km region in the vicinity of the Barrow Environmental Observatory near Barrow, Ak.

Gangodagamage, Chandana; Wilson, Cathy; Rowland, Joel

2013-12-08T23:59:59.000Z

211

Aerosol measurements at a high-elevation site: composition, size, and cloud condensation nuclei activity  

E-Print Network [OSTI]

Measurements of cloud condensation nuclei (CCN) concentrations, single particle composition and size distributions at a high-elevation research site from March 2011 are presented.

Friedman, B.

212

E-Print Network 3.0 - anterior st-segment elevation Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Utah Collection: Biology and Medicine ; Engineering 8 Sudden Cardiac Arrest: ECG Repolarization after Resuscitation Summary: elevation nor ERep Group 2: ST segment...

213

Coupled dynamics of a tower with an elevated wave tank. Part 1: Equations of motion and eigenoscillations  

E-Print Network [OSTI]

Coupled dynamics of a tower with an elevated wave tank. Part 1: Equations of motion problem is derived to describe coupled dynamics of a tower with an elevated tank on the tower top, elevated tanks, Ritz'-Treftz method 1. INTRODUCTION Modeling the dynamic behavior of elevated liquid

214

H Gain Scheduling for Discrete-Time Systems with Control Delays and Time-Varying Parameters: a BMI Approach  

E-Print Network [OSTI]

H Gain Scheduling for Discrete-Time Systems with Control Delays and Time-Varying Parameters: a BMI. By using a memory at the feedback loop, a discrete gain scheduled controller which minimizes an upper bound, there is no denying the fact that gain scheduling has represented an important issue within control system theory [1

215

Gain saturation studies in LG-750 and LG-770 amplifier glass  

SciTech Connect (OSTI)

Experiments were performed on the 100-J class Optical Sciences Laser (OSL) at LLNL to characterize the saturation fluence and small-signal gain of a solid-state Nd:glass amplifier utilizing LG-750 and LG-770, an amplifier glass developed for the National Ignition Facility (NIF). These high quality measurements of gain saturation at NIF level fluences, i.e., 10-15 J/cm{sup 2}, provide essential parameters for the amplifier performance codes used to design NIF and future high power laser systems. The small-signal gain, saturation fluence and square-pulse distortion were measured as a function of input fluence and pulse length in platinum-free LG-750 and LG-770. The input fluence, output fluence, small-signal gain and passive losses were measured to allow calculation of the saturation fluence. Least square fits of the output vs. input fluence data using a Frantz-Nodvik model was used to obtain an average saturation fluence for each data set. Overall, gain saturation in LG-750 and LG-770 is comparable at long pulse lengths. For shorter pulse length, < 5 ns, LG-770 exhibits a stronger pulse length dependence than LG-750, possibly due to a longer terminal level lifetime. LG-770 also has a higher cross- section, which is reflected by its slightly higher extraction efficiency. 52 refs., 11 figs., 2 tabs.

Pennington, D.M.; Milam, D.; Eimerl, D.

1997-03-10T23:59:59.000Z

216

Roots and fungi accelerate carbon and nitrogen cycling in forests exposed to elevated CO2  

E-Print Network [OSTI]

LETTER Roots and fungi accelerate carbon and nitrogen cycling in forests exposed to elevated CO2 of soil carbon (C) accu- mulation owing to microbial priming of `old' soil organic matter (SOM). However under elevated CO2 is sufficient in magnitude to offset increased belowground inputs. In addition, the C

Phillips, Richard P.

217

SERVICE LIFE OF A LANDFILL LINER SYSTEM SUBJECTED TO ELEVATED TEMPERATURES  

E-Print Network [OSTI]

SERVICE LIFE OF A LANDFILL LINER SYSTEM SUBJECTED TO ELEVATED TEMPERATURES Timothy D. Stark, Ph and possible publication in the ASCE Journal of Hazardous, Toxic, and Radioactive Waste Management April 14-Engineered-Components-ServiceLife-Submission_2.pdf #12;2 SERVICE LIFE OF LANDFILL LINER SYSTEMS SUBJECTED TO ELEVATED1 TEMPERATURES2 Timothy D

218

UBC Social Ecological Economic Development Studies (SEEDS) Student Report Elevator Drive Systems Energy Consumption Study Report  

E-Print Network [OSTI]

Energy Consumption Study Report Benny ChunYin Chan University of British Columbia EECE 492 April 6th the current status of the subject matter of a project/report". #12;Elevator Drive Systems Energy Consumption Study Report April 2012 0 2012 Elevator Drive Systems Energy Consumption Study Report Benny CY Chan UBC

219

Elevated CO2 stimulates grassland soil respiration by increasing carbon inputs rather than by enhancing soil  

E-Print Network [OSTI]

Elevated CO2 stimulates grassland soil respiration by increasing carbon inputs rather than It is not clear whether the consistent positive effect of elevated CO2 on soil respiration (soil carbon flux, SCF) results from increased plant and microbial activity due to (i) greater C availability through CO2-induced

Minnesota, University of

220

Leaf gas exchange and carbohydrate concentrations in Pinus pinaster plants subjected to elevated CO2  

E-Print Network [OSTI]

to elevated CO2 and a soil drying cycle Catherine Picon-Cochard Jean-Marc Guehl Unité de recherches en.) were acclimated for 2 years under ambient (350 ?mol mol-1)and elevated (700 ?mol mol-1) CO2 concentrations ([CO2]). In the summer of the second growing season, the plants were subjected to a soil drying

Paris-Sud XI, Université de

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221

Climate Change Effects on High-Elevation Hydropower System in KAVEH MADANI LARIJANI  

E-Print Network [OSTI]

i Climate Change Effects on High-Elevation Hydropower System in California By KAVEH MADANI LARIJANI ___________________________________________ Committee in Charge 2009 #12;ii Abstract The high-elevation hydropower system in California, composed of more than 150 hydropower plants and regulated by the Federal Energy Regulatory Commission (FERC

Lund, Jay R.

222

ORIGINAL PAPER Effects of elevated CO2 and soil water content on phytohormone  

E-Print Network [OSTI]

and agricultural productivity (Goldblum 2009), whereas elevated CO2 has the opposite effect (Ainsworth and LongORIGINAL PAPER Effects of elevated CO2 and soil water content on phytohormone transcript induction increased atmospheric CO2 and drought in the future, possibly altering plant insect dynamics

DeLucia, Evan H.

223

Gain dynamics of quantum dot devices for dual-state operation  

SciTech Connect (OSTI)

Ground state gain dynamics of In(Ga)As-quantum dot excited state lasers are investigated via single-color ultrafast pump-probe spectroscopy below and above lasing threshold. Two-color pump-probe experiments are used to localize lasing and non-lasing quantum dots within the inhomogeneously broadened ground state. Single-color results yield similar gain recovery rates of the ground state for lasing and non-lasing quantum dots decreasing from 6 ps to 2 ps with increasing injection current. We find that ground state gain dynamics are influenced solely by the injection current and unaffected by laser operation of the excited state. This independence is promising for dual-state operation schemes in quantum dot based optoelectronic devices.

Kaptan, Y., E-mail: yuecel.kaptan@physik.tu-berlin.de; Herzog, B.; Kolarczik, M.; Owschimikow, N.; Woggon, U. [Institut fr Optik und Atomare Physik, Technische Universitt Berlin, Berlin (Germany); Schmeckebier, H.; Arsenijevi?, D.; Bimberg, D. [Institut fr Festkrperphysik, Technische Universitt Berlin, Berlin (Germany); Mikhelashvili, V.; Eisenstein, G. [Technion Institute of Technology, Faculty of Electrical Engineering, Haifa (Israel)

2014-06-30T23:59:59.000Z

224

Building accurate initial models using gain functions for waveform inversion in the Laplace domain  

E-Print Network [OSTI]

We suggest an initial model building technique using time gain functions in the Laplace domain. Applying the gain expressed as a power of time is equivalent to taking the partial derivative of the Laplace-domain wavefield with respect to a damping constant. We construct an objective function, which minimizes the logarithmic differences between the gained field data and the partial derivative of the modeled data with respect to the damping constant. We calculate the modeled wavefield, the partial derivative wavefield, and the gradient direction in the Laplace domain using the analytic Green's function starting from a constant velocity model. This is an efficient method to generate an accurate initial model for a following Laplace-domain inversion. Numerical examples using two marine field datasets confirm that a starting model updated once from a scratch using the gradient direction calculated with the proposed method can be successfully used for a subsequent Laplace-domain inversion.

Wansoo Ha; Changsoo Shin

2014-08-20T23:59:59.000Z

225

Fuel Cycle Analysis Framework Base Cases for the IAEA/INPRO GAINS Collaborative Project  

SciTech Connect (OSTI)

Thirteen countries participated in the Collaborative Project GAINS Global Architecture of Innovative Nuclear Energy Systems Based on Thermal and Fast Reactors Including a Closed Fuel Cycle, which was the primary activity within the IAEA/INPRO Program Area B: Global Vision on Sustainable Nuclear Energy for the last three years. The overall objective of GAINS was to develop a standard framework for assessing future nuclear energy systems taking into account sustainable development, and to validate results through sample analyses. This paper details the eight scenarios that constitute the GAINS framework base cases for analysis of the transition to future innovative nuclear energy systems. The framework base cases provide a reference for users of the framework to start from in developing and assessing their own alternate systems. Each base case is described along with performance results against the GAINS sustainability evaluation metrics. The eight cases include four using a moderate growth projection and four using a high growth projection for global nuclear electricity generation through 2100. The cases are divided into two sets, addressing homogeneous and heterogeneous scenarios developed by GAINS to model global fuel cycle strategies. The heterogeneous world scenario considers three separate nuclear groups based on their fuel cycle strategies, with non-synergistic and synergistic cases. The framework base case analyses results show the impact of these different fuel cycle strategies while providing references for future users of the GAINS framework. A large number of scenario alterations are possible and can be used to assess different strategies, different technologies, and different assumptions about possible futures of nuclear power. Results can be compared to the framework base cases to assess where these alternate cases perform differently versus the sustainability indicators.

Brent Dixon

2012-09-01T23:59:59.000Z

226

FEL and Optical Klystron Gain for an Electron Beam with Oscillatory Energy Distribution  

SciTech Connect (OSTI)

If the energy spread of a beam is larger then the Pierce parameter, the FEL gain length increases dramatically and the FEL output gets suppressed. We show that if the energy distribution of such a beam is made oscillatory on a small scale, the gain length can be considerably decreased. Such an oscillatory energy distribution is generated by first modulating the beam energy with a laser via the mechanism of inverse FEL, and then sending it through a strong chicane. We show that this approach also works for the optical klystron enhancement scheme. Our analytical results are corroborated by numerical simulations.

Stupakov, G.; Ding, Y.; Huang, Z.; /SLAC

2009-12-09T23:59:59.000Z

227

High Average Power Laser Gain Medium With Low Optical Distortion Using A Transverse Flowing Liquid Host  

DOE Patents [OSTI]

A high average power, low optical distortion laser gain media is based on a flowing liquid media. A diode laser pumping device with tailored irradiance excites the laser active atom, ion or molecule within the liquid media. A laser active component of the liquid media exhibits energy storage times longer than or comparable to the thermal optical response time of the liquid. A circulation system that provides a closed loop for mixing and circulating the lasing liquid into and out of the optical cavity includes a pump, a diffuser, and a heat exchanger. A liquid flow gain cell includes flow straighteners and flow channel compression.

Comaskey, Brian J. (Walnut Creek, CA); Ault, Earl R. (Livermore, CA); Kuklo, Thomas C. (Oakdale, CA)

2005-07-05T23:59:59.000Z

228

Long wavelength, high gain InAsSb strained-layer superlattice photoconductive detectors  

DOE Patents [OSTI]

A high gain photoconductive device for 8 to 12 .mu.m wavelength radiation including an active semiconductor region extending from a substrate to an exposed face, the region comprising a strained-layer superlattice of alternating layers of two different InAs.sub.1-x Sb.sub.x compounds having x>0.75. A pair of spaced electrodes are provided on the exposed face, and changes in 8 to 12 .mu.m radiation on the exposed face cause a large photoconductive gain between the spaced electrodes.

Biefeld, Robert M. (Albuquerque, NM); Dawson, L. Ralph (Albuquerque, NM); Fritz, Ian J. (Albuquerque, NM); Kurtz, Steven R. (Albuquerque, NM); Zipperian, Thomas E. (Albuquerque, NM)

1991-01-01T23:59:59.000Z

229

Benefits of the International Residential Code's Maximum Solar heat Gain Coefficient Requirement for Windows  

E-Print Network [OSTI]

Texas adopted in its residential building energy code a maximum 0.40 solar heat gain coefficient (SHGC) for fenestration (e.g., windows, glazed doors and skylights)-a critical driver of cooling energy use, comfort and peak demand. An analysis...

Stone, G. A.; DeVito, E. M.; Nease, N. H.

2002-01-01T23:59:59.000Z

230

Neural Computation 9, 971983 (1997) Physiological Gain Leads to High ISI Variability in  

E-Print Network [OSTI]

Neural Computation 9, 971­983 (1997) Physiological Gain Leads to High ISI Variability in a Simple@phy.ucsf.edu, ken@phy.ucsf.edu Abstract To understand the interspike interval (ISI) variability displayed by visual that have previously been proposed. When ISI's are dominated by post­spike recovery, 1= p N arguments hold

Columbia University

231

CMOS Photodiodes with Substrate Openings for Higher Conversion Gain in Active Pixel Sensors  

E-Print Network [OSTI]

1 CMOS Photodiodes with Substrate Openings for Higher Conversion Gain in Active Pixel Sensors J. S' in photodiodes used in active pixel sensor. The discussion is based on experimental data from contact diffusion (n+ pepi) photodiodes fabricated on a standard 0.35 µm CMOS technology. I. Introduction The readout

Hornsey, Richard

232

The physics issues that determine inertial confinement fusion target gain and driver requirements: A tutorial*  

E-Print Network [OSTI]

The physics issues that determine inertial confinement fusion target gain and driver requirements ``bookkeeping'' of input parametrized by ICF drivers' coupling efficiencies to the target, and subsequent requirements will be discussed for both the direct drive driver impinging directly on the target and indirect

233

Delivering pump light to a laser gain element while maintaining access to the laser beam  

DOE Patents [OSTI]

A lens duct is used for pump delivery and the laser beam is accessed through an additional component called the intermediate beam extractor which can be implemented as part of the gain element, part of the lens duct or a separate component entirely.

Beach, Raymond J. (Livermore, CA); Honea, Eric C. (Sunol, CA); Payne, Stephen A. (Castro Valley, CA)

2001-01-01T23:59:59.000Z

234

Gain and Equalization Adaptation to Optimize the Vertical Eye Opening in a Wireline Receiver  

E-Print Network [OSTI]

loss and skin-effect can severely limit a wireline receiver's ability to operate at high-speeds, Toronto, Ontario, Canada Abstract--A strategy for the adaptation of an equalizer and variable gain amplifier is presented. Both control signals are generated by examining the probability density function

Chan Carusone, Tony

235

Daily routines of body mass gain in birds: 2. An experiment with reduced food availability  

E-Print Network [OSTI]

; published online 31 July 2006; MS. number: 8608R) Theoretical models predict that small birds should adjust daily patterns of body mass gain in response to environmental and internal factors. In a companion paper, we described a model on daily fattening that allows the analysis of precise changes in the shape

Carrascal, Luis M.

236

THE CONCEPT OF ISOCHORIC CENTRAL SPARK IGNITION AND ITS FUEL GAIN IN INERTIAL FUSION  

E-Print Network [OSTI]

1 THE CONCEPT OF ISOCHORIC CENTRAL SPARK IGNITION AND ITS FUEL GAIN IN INERTIAL FUSION of the best methods in inertial confinement fusion (ICF) is the concept of central spark ignition, consisting of two distinct regions named as hot and cold regions and formed by hydro-dynamical implosion of fuel

Boyer, Edmond

237

Gain Scheduled Control of a Solar Power Plant Tor A. Johansen1  

E-Print Network [OSTI]

Gain Scheduled Control of a Solar Power Plant Tor A. Johansen1 , Kenneth J. Hunt2 and Idar Petersen to a pilot-scale solar power plant is described. A eld of parabolic collectors focus the solar radiation onto a tube where oil is pumped through in order to collect the solar power. The control problem is to keep

Johansen, Tor Arne

238

Why help in this way? Insights gained from an approachable contact  

E-Print Network [OSTI]

Why help in this way? Insights gained from an approachable contact within an organisation can make to a student query when you feel able to help by sharing your experiences and offering advice. How do I become for Rolls-Royce in helping us to secure the best graduate talent but having helped 3 Lancaster students

Diggle, Peter J.

239

Trade and plant level productivity gains: Role of Import Liberalisation, Technological Spillovers and Variety Growth in  

E-Print Network [OSTI]

1 Trade and plant level productivity gains: Role of Import Liberalisation, Technological Spillovers liberalization impact productivity at the micro level in the economy? Using a panel data of Indian manufacturing productivity growth at the production level in the economy. These mechanisms include trade induced pro

Bandyopadhyay, Antar

240

The Maroon and White Game: A simulation of trust and long-term gains and losses  

E-Print Network [OSTI]

to players the advantages of systems thinking, as opposed to sub-optimization, during a live playing of the game. Although effective in illustrating the greater mathematic gains incurred from systems thinking to a community-at-large, the simulation might...

Smith, James P.; Rybkowski, Zofia K.

2013-07-31T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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

Study in Indonesia and gain credit towards your degree! InternationalRelationsinIndonesia  

E-Print Network [OSTI]

Study in Indonesia and gain credit towards your degree! InternationalRelationsinIndonesia, Europe and the United States as well as Indonesia, are highly qualified and ex- perienced as both the Australia Indonesia Institute, the Department of Education, Employment and Workplace Relations, the Myer

242

Study in Indonesia... and gain credit towards your degree! JournalismProfessionalPracticum  

E-Print Network [OSTI]

Study in Indonesia... and gain credit towards your degree! JournalismProfessionalPracticum inIndonesia will deep- en their understanding of Indonesia whilst developing their journalism skills within will be a high-calibre journalist who has experience with different elements of the media in both Indonesia

243

High-gain weakly nonlinear flux-modulated Josephson parametric amplifier using a SQUID-array  

E-Print Network [OSTI]

Chalmers University of Technology, S-41296 Goteborg, Sweden. (Dated: June 20, 2014) Abstract We have gain satu- ration at extremely low input power. A strong effort is thus made to increase the bandwidth modulates this nonlinear inductance at 2P , and is responsible for a four-wave mixing such that 2P = S + I

Boyer, Edmond

244

Solar Heat Gain through a Skylight in a Light Well J. H. Klems  

E-Print Network [OSTI]

Solar Heat Gain through a Skylight in a Light Well J. H. Klems Building Technologies Department on a skylight mounted on a light well of significant depth are presented. It is shown that during the day much of the solar energy that strikes the walls of the well does not reach the space below. Instead, this energy

245

Bounds on the Gain of Network Coding and Broadcasting in Wireless Networks  

E-Print Network [OSTI]

1 Bounds on the Gain of Network Coding and Broadcasting in Wireless Networks Junning Liu , Dennis the possibility of network coding and broadcasting in their model, and recent work has suggested network coding and broadcasting in a )10 random topology that the throughput scales as ¥§¦¨¤©2

Massachusetts at Amherst, University of

246

Gain assisted propagation of surface plasmon polaritons on planar metallic waveguides  

E-Print Network [OSTI]

and optical gain in InGaAsP quantum well lasers," Semiconductors 36, 344-353 (2002). 17. S. Y. Hu, D. B. Young compensate for the absorption losses in the metal. The conditions for existence of a surface plasmon

Fainman, Yeshaiahu

247

Gain Improvement of Er-doped Amplifiers for the Feedback Filters  

E-Print Network [OSTI]

contrast between these two materials and the electro-optical properties of Ti: LiNbO3. Furthermore, waveguide gain is introduced through selective surface erbium (Er) doping which yields high quality loss-compensated or even amplifying waveguides without...

Song, Xiaomin

2012-02-14T23:59:59.000Z

248

Optimization of stomatal conductance for maximum carbon gain under dynamic soil moisture  

E-Print Network [OSTI]

Optimization of stomatal conductance for maximum carbon gain under dynamic soil moisture Stefano Accepted 26 September 2013 Available online 9 October 2013 Keywords: Optimization Photosynthesis Soil moisture Stomatal conductance Transpiration a b s t r a c t Optimization theories explain a variety

Katul, Gabriel

249

Enhancement of sensitivity gain and frequency tuning by coupling of active hair bundles  

E-Print Network [OSTI]

Enhancement of sensitivity gain and frequency tuning by coupling of active hair bundles Kai Dierkes. A candidate for this process is active hair bundle mechanics observed, for instance, for hair cells of the bullfrog's sacculus. Hair bundles in various inner ear organs are coupled by overlying membranes. Using

Jlicher, Frank

250

Response of tundra ecosystems to elevated atmospheric carbon dioxide. [Annual report  

SciTech Connect (OSTI)

Our past research shows that arctic tussock tundra responds to elevated atmospheric CO{sub 2} with marked increases in net ecosystem carbon flux and photosynthetic rates. However, at ambient temperatures and nutrient availabilities, homeostatic adjustments result in net ecosystem flux rates dropping to those found a contemporary CO{sub 2} levels within three years. Evidence for ecosystem-level acclimation in the first season of elevated CO{sub 2} exposure was found in 1987. Photosynthetic rates of Eriophorum vaginatum, the dominant species, adjusts to elevated CO{sub 2} within three weeks. Past research also indicates other changes potentially important to ecosystem structure and function. Elevated CO{sub 2} treatment apparently delays senescence and increases the period of positive photosynthetic activity. Recent results from the 1987 field season verify the results obtained in the 1983--1986 field seasons: Elevated CO{sub 2} resulted in increased ecosystem-level flux rates. Regressions fitted to the seasonal flux rates indicate an apparent 10 d extension of positive CO{sub 2} uptake reflecting a delay of the onset of plant dormancy. This delay in senescence could increase the frost sensitivity of the system. Major end points proposed for this research include the effects of elevated CO{sub 2} and the interaction of elevated atmospheric CO{sub 2} with elevated soil temperature and increased nutrient availability on: (1) Net ecosystem CO{sub 2} flux; (2) Net photosynthetic rates; (3) Patterns and resource controls on homeostatic adjustment in the above processes to elevated CO{sub 2}; (4) Plant-nutrient status, litter quality, and forage quality; (5) Soil-nutrient status; (6) Plant-growth pattern and shoot demography.

Oechel, W.C.; Grulke, N.E.

1988-12-31T23:59:59.000Z

251

Reply to Comments on "Elevated Heat Pump" Hypothesis for the1 AerosolMonsoon Hydroclimate Link: "Grounded" in Observations?2  

E-Print Network [OSTI]

1 Reply to Comments on "Elevated Heat Pump" Hypothesis for the1 Aerosol­Monsoon Hydroclimate Link, hereafter LK11] defense of the Elevated Heat Pump (EHP) hypothesis35 is unsubstantiated. Nigam and Bollasina

Nigam, Sumant

252

Electronic structure of perovskite oxide surfaces at elevated temperatures and its correlation with oxygen reduction reactivity  

E-Print Network [OSTI]

The objective is to understand the origin of the local oxygen reduction reaction (ORR) activity on the basis of the local electronic structure at the surface of transition metal oxides at elevated temperatures and in oxygen ...

Chen, Yan, Ph. D. Massachusetts Institute of Technology

2014-01-01T23:59:59.000Z

253

Steels for hydrogen service at elevated temperatures and pressures in petroleum refineries and petrochemical plants  

SciTech Connect (OSTI)

This book presents suggested operating limits for steels used in equipment at petroleum refineries and petrochemical plants in which hydrogen or hydrogen-containing fluids are processed at elevated temperatures and pressures.

Not Available

1990-01-01T23:59:59.000Z

254

Carbon Dynamics in Aquatic Ecosystems in Response to Elevated Atmospheric CO2 and Altered Nutrients Availability  

E-Print Network [OSTI]

. Our results show that elevated CO2 led to enhanced photosynthetic carbon uptake and dissolved organic carbon (DOC) production. DOC occupied larger percentage in total organic carbon production in high CO2 environment. N addition stimulated biomass...

Song, Chao

2011-04-26T23:59:59.000Z

255

E-Print Network 3.0 - acute st elevation Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

than ST-Segment Deviation Summary: with acute symptoms only ST elevation on the standard ECG is clinically considered to be indicative... the high- frequency method. In 71% of the...

256

E-Print Network 3.0 - acute st-elevation myocardial Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

than ST-Segment Deviation Summary: with acute symptoms only ST elevation on the standard ECG is clinically considered to be indicative... have shown decreased HF-QRS in the...

257

Contracting Rail Freight Services for Country Elevators in the Texas Panhandle.  

E-Print Network [OSTI]

rooe ZTA245.7 B873 r\\O. 1473 -.-_ LIBRARY B-1473 JUDe 1984 JUL 27 1984 Co Rail Freight Services for Country Elevators in the Texas Panhandle The Texas Agricultural Experiment Station, Neville P. Clarke, Director, The Texas A&M University... ............................................................... 14 ACKNOWLEDGEMENTS ........................................................... 14 CONTRACTING RAIL FREIGHT-SERVICES FOR COUNTRY ELEVATORS IN THE TEXAS PANHANDLE Stephen Fuller Department of Agricultural Economics Texas Agricultural Experiment...

Fuller, Stephen

1984-01-01T23:59:59.000Z

258

Application of current unified viscoplastic constitutive models to Hastelloy X at elevated temperatures  

E-Print Network [OSTI]

APPLICATION OF CURRENT UNIFIED VISCOPLASTIC CONSTITUTIVE MODELS TO HASTELLOY X AT ELEVATED TEMPERATURES A Thesis by LISA DIANE MCCREA Submi. tted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 1990 Major Subject: Aerospace Engineering, APPLICATION OF CURRENT UNIFIED VISCOPLASTIC CONSTITUTIVE MODELS TO HASTELLOY X AT ELEVATED TEMPERATURES A Thesis by LISA DIANE MCCREA Approued...

McCrea, Lisa Diane

1990-01-01T23:59:59.000Z

259

Rhizodeposition-induced decomposition increases N availability to wild and cultivated wheat genotypes under elevated CO2  

E-Print Network [OSTI]

genotypes under elevated CO2 Marie-Anne de Graaff a,b,*, Chris Van Kessel a , Johan Six a a Department Available online 11 March 2009 Keywords: Elevated CO2 Rhizodeposition N mineralization 13 C 15 N Genotypes a b s t r a c t Elevated CO2 may increase nutrient availability in the rhizosphere bystimulating N

van Kessel, Chris

260

Will elevated carbon dioxide concentration amplify the benefits of nitrogen fixation in legumes?  

SciTech Connect (OSTI)

Growth at elevated [CO{sub 2}] stimulates photosynthesis and increases carbon (C) supply in all C3 species. A sustained and maximal stimulation in productivity at elevated [CO{sub 2}] requires an enhanced nutrient supply to match the increase in C acquisition. The ability of legumes to exchange C for nitrogen (N) with their N{sub 2}-fixing symbionts has led to the hypothesis that legumes will have a competitive advantage over nonleguminous species when grown at elevated [CO{sub 2}]. On balance, evidence suggests that in managed systems, legumes are more responsive to elevated [CO{sub 2}] than other plants (e.g. Ainsworth and Long, 2005); however, in natural ecosystems, nutrient availability can limit the response of legumes to elevated [CO{sub 2}] (Hungate et al., 2004; van Groenigen et al., 2006). Here, we consider these observations, outline the mechanisms that underlie them, and examine recent work that advances our understanding of how legumes respond to growth at elevated [CO{sub 2}]. First we highlight the global importance of legumes and provide a brief overview of the symbiotic relationship.

Rogers, A.; Ainsworth, E. A.; Leakey, A. D. B.

2009-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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

Vapor pressure and boiling point elevation of slash pine black liquors: Predictive models with statistical approach  

SciTech Connect (OSTI)

Vapor-liquid equilibria and boiling point elevation of slash pine kraft black liquors over a wide range of solid concentrations (up to 85% solids) has been studied. The liquors are from a statistically designed pulping experiment for pulping slash pine in a pilot scale digester with four cooking variables of effective alkali, sulfidity, cooking time, and cooking temperature. It was found that boiling point elevation of black liquors is pressure dependent, and this dependency is more significant at higher solids concentrations. The boiling point elevation data at different solids contents (at a fixed pressure) were correlated to the dissolved solids (S/(1 {minus} S)) in black liquor. Due to the solubility limit of some of the salts in black liquor, a change in the slope of the boiling point elevation as a function of the dissolved solids was observed at a concentration of around 65% solids. An empirical method was developed to describe the boiling point elevation of each liquor as a function of pressure and solids mass fraction. The boiling point elevation of slash pine black liquors was correlated quantitatively to the pulping variables, using different statistical procedures. These predictive models can be applied to determine the boiling point rise (and boiling point) of slash pine black liquors at processing conditions from the knowledge of pulping variables. The results are presented, and their utility is discussed.

Zaman, A.A.; McNally, T.W.; Fricke, A.L. [Univ. of Florida, Gainesville, FL (United States)] [Univ. of Florida, Gainesville, FL (United States)

1998-01-01T23:59:59.000Z

262

Reducing Thermal Losses and Gains With Buried and Encapsulated Ducts in Hot-Humid Climates  

SciTech Connect (OSTI)

The Consortium for Advanced Residential Buildings (CARB) monitored three houses in Jacksonville, FL, to investigate the effectiveness of encapsulated and encapsulated/buried ducts in reducing thermal losses and gains from ductwork in unconditioned attics. Burying ductwork beneath loose-fill insulation has been identified as an effective method of reducing thermal losses and gains from ductwork in dry climates, but it is not applicable in humid climates where condensation may occur on the outside of the duct jacket. By encapsulating the ductwork in closed cell polyurethane foam (ccSPF) before burial beneath loose-fill mineral fiber insulation, the condensation potential may be reduced while increasing the R-value of the ductwork.

Shapiro, C.; Magee, A.; Zoeller, W.

2013-02-01T23:59:59.000Z

263

Gain, directionality and noise in microwave SQUID amplifiers: Input-output approach  

E-Print Network [OSTI]

We present a new theoretical framework to analyze microwave amplifiers based on the dc SQUID. Our analysis applies input-output theory generalized for Josephson junction devices biased in the running state. Using this approach we express the high frequency dynamics of the SQUID as a scattering between the participating modes. This enables us to elucidate the inherently nonreciprocal nature of gain as a function of bias current and input frequency. This method can, in principle, accommodate an arbitrary number of Josephson harmonics generated in the running state of the junction. We report detailed calculations taking into account the first few harmonics that provide simple semi-quantitative results showing a degradation of gain, directionality and noise of the device as a function of increasing signal frequency. We also discuss the fundamental limits on device performance and applications of this formalism to real devices.

Archana Kamal; John Clarke; Michel Devoret

2012-06-20T23:59:59.000Z

264

Quantum noise of white light cavity using double-pumped gain medium  

E-Print Network [OSTI]

Laser interferometric gravitational-wave detectors implement Fabry-Perot cavities to increase their peak sensitivity. However, this is at cost of reducing their detection bandwidth, which origins from the propagation phase delay of the light. The "white-light-cavity" idea, first proposed by Wicht et al. [Optics Communications 134, 431 (1997)], is to circumvent this limitation by introducing anomalous dispersion, using double-pumped gain medium, to compensate for such phase delay. In this article, starting from the Hamiltonian of atom-light interaction, we apply the input-output formalism to evaluate the quantum noise of the system. We find that apart from the additional noise associated with the parametric amplification process noticed by others, the stability condition for the entire system poses an additional constraint. Through surveying the parameter regimes where the gain medium remains stable (not lasing) and stationary, we find that there is no net enhancement of the shot-noise limited sensitivity. The...

Ma, Yiqiu; Zhao, Chunnong; Chen, Yanbei

2015-01-01T23:59:59.000Z

265

Robust random number generation using steady-state emission of gain-switched laser diodes  

SciTech Connect (OSTI)

We demonstrate robust, high-speed random number generation using interference of the steady-state emission of guaranteed random phases, obtained through gain-switching a semiconductor laser diode. Steady-state emission tolerates large temporal pulse misalignments and therefore significantly improves the interference quality. Using an 8-bit digitizer followed by a finite-impulse-response unbiasing algorithm, we achieve random number generation rates of 8 and 20?Gb/s, for laser repetition rates of 1 and 2.5?GHz, respectively, with a 20% tolerance in the interferometer differential delay. We also report a generation rate of 80?Gb/s using partially phase-correlated short pulses. In relation to the field of quantum key distribution, our results confirm the gain-switched laser diode as a suitable light source, capable of providing phase-randomized coherent pulses at a clock rate of up to 2.5?GHz.

Yuan, Z. L., E-mail: zhiliang.yuan@crl.toshiba.co.uk; Lucamarini, M.; Dynes, J. F.; Frhlich, B.; Plews, A.; Shields, A. J. [Toshiba Research Europe Limited, Cambridge Research Laboratory, 208 Cambridge Science Park, Milton Road, Cambridge CB4 0GZ (United Kingdom)

2014-06-30T23:59:59.000Z

266

High gain, Fast Scan, Broad Spectrum Parallel Beam Wavelength Dispersive X-ray Spectrometer for SEM  

SciTech Connect (OSTI)

During contract # DE-FG02-ER83545, Parallax Research, Inc. developed a High gain, Fast Scan Broad Spectrum Parallel beam Wavelength Dispersive X-ray Spectrometer for use on Scanning Electron Microscopes (SEM). This new spectrometer allows very fast high resolution elemental analysis of samples in an electron microscope. By comparison to previous WDS spectrometers, it can change from one energy position to another very quickly and has an extended range compared to some similar products.

OHara, David

2009-05-08T23:59:59.000Z

267

High Gain, Fast Scan, Broad Spectrum, Parallel Beam Wavelength Dispersive X-ray Spectrometer for SEM  

SciTech Connect (OSTI)

Parallax Research, Inc. proposes to produce a new type of x-ray spectrometer for use with Scanning Electron Microscopy (SEM) that would have the energy resolution of WDS and the ease of use of EDS with sufficient gain for lower energies that it can be used at low beam currents as is EDS. Parallax proposes to do this by development of new multiple reflection x-ray collimation optics, new diffractor technology, new detector technology and new scan algorithms.

David OHara; Dr. Eric Lochmer

2003-09-12T23:59:59.000Z

268

Measuring solar reflectance Part I: Defining a metric that accurately predicts solar heat gain  

SciTech Connect (OSTI)

Solar reflectance can vary with the spectral and angular distributions of incident sunlight, which in turn depend on surface orientation, solar position and atmospheric conditions. A widely used solar reflectance metric based on the ASTM Standard E891 beam-normal solar spectral irradiance underestimates the solar heat gain of a spectrally selective 'cool colored' surface because this irradiance contains a greater fraction of near-infrared light than typically found in ordinary (unconcentrated) global sunlight. At mainland U.S. latitudes, this metric RE891BN can underestimate the annual peak solar heat gain of a typical roof or pavement (slope {le} 5:12 [23{sup o}]) by as much as 89 W m{sup -2}, and underestimate its peak surface temperature by up to 5 K. Using R{sub E891BN} to characterize roofs in a building energy simulation can exaggerate the economic value N of annual cool-roof net energy savings by as much as 23%. We define clear-sky air mass one global horizontal ('AM1GH') solar reflectance R{sub g,0}, a simple and easily measured property that more accurately predicts solar heat gain. R{sub g,0} predicts the annual peak solar heat gain of a roof or pavement to within 2 W m{sup -2}, and overestimates N by no more than 3%. R{sub g,0} is well suited to rating the solar reflectances of roofs, pavements and walls. We show in Part II that R{sub g,0} can be easily and accurately measured with a pyranometer, a solar spectrophotometer or version 6 of the Solar Spectrum Reflectometer.

Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul

2010-05-14T23:59:59.000Z

269

Gain scheduling adaptive control strategies for HVDC systems to accommodate large disturbances  

SciTech Connect (OSTI)

Techniques have been developed to permit the response of the controls for dc transmission systems to adapt to large system changes. A gain scheduling approach tunes the control as an on-line function of the effective short-circuit ratio and contingency indicators. The method has been tested by digital simulation, based on EMTP, of a back-to-back dc system. It has been found to be robust and control performance has been enhanced.

Reeve, J.; Sultan, M. (Univ. of Waterloo, Ontario (Canada))

1994-02-01T23:59:59.000Z

270

Prediction of internal temperature swings in direct-gain passive-solar buildings  

SciTech Connect (OSTI)

The diurnal heat capacity method is presented for estimating inside-temperature swings attributable to direct winter solar gain. The procedures are simplified to be suitable for hand analysis, aided by tables of diurnal heat capacity for various materials. The method has been spot checked against computer simulation and has been used successfully by a group of 20 builders in New Mexico to analyze whether temperature swings would be excessive in their designs.

Balcomb, J.D.

1983-01-01T23:59:59.000Z

271

Investigation of the electron trajectories and gain regimes of the whistler pumped free-electron laser  

SciTech Connect (OSTI)

A free-electron laser (FEL) scheme, which employs the whistler wave as a slow electromagnetic wave wiggler, was studied theoretically. Subjected to the transverse fields of whistler wave wiggler, the beam electrons are the source of the energy needed to produce electromagnetic radiation. The strength and the period of the wiggler field depend on the parameters of the magnetoplasma medium. This configuration has a higher tunability by controlling the plasma density, on top of the {gamma}-tunability of the conventional FELs. The theory of linear gain and electron trajectories was presented and four groups (I, II, III, and IV) of electron orbits were found in the presence of an axial guide magnetic field. Using perturbation analysis, it is found that these groups of orbits were stable except small regions of group I and IV orbits. The function {Phi} which determines the rate of change of axial velocity with beam energy was also derived. In the case in which {Phi}<0 represents a negative-mass regime in which the axial velocity accelerates as the electrons lose energy. Numerical solutions showed that by increasing the cyclotron frequency, the gain for group I and III orbits increased, while a gain decrement was obtained for group II and IV orbits.

Jafarinia, F.; Jafari, S. [Department of Physics, University of Guilan, Rasht 41335-1914 (Iran, Islamic Republic of); Mehdian, H. [Department of Physics and Institute for Plasma Research, Tarbiat Moallem University, Tehran 15614 (Iran, Islamic Republic of)

2013-04-15T23:59:59.000Z

272

HELPING BEHAVIOUR DURING COOPERATIVE LEARNING AND LEARNING GAINS: THE ROLE OF THE TEACHER AND OF PUPILS' PRIOR KNOWLEDGE AND ETHNIC  

E-Print Network [OSTI]

1 HELPING BEHAVIOUR DURING COOPERATIVE LEARNING AND LEARNING GAINS: THE ROLE OF THE TEACHER, J. W. (2008). Helping behaviour during cooperative learning and learning gains: The role-159" #12;2 Running head: Helping behaviour during cooperative learning Helping behaviour during cooperative

Paris-Sud XI, Université de

273

Inelastic neutron and low-frequency Raman scattering in a niobium-phosphate glass for Raman gain applications  

E-Print Network [OSTI]

Inelastic neutron and low-frequency Raman scattering in a niobium-phosphate glass for Raman gain: Raman scattering; Neutron scattering; Raman gain; Boson peak We present measurements of the vibrational, extracted from specific-heat or neutron scattering measurements [7,8]. Only very recently two of the present

Schirmacher, Walter

274

Abstract--A simple method is presented to reduce the number of scheduling parameters for gain-scheduled  

E-Print Network [OSTI]

to a zero- parameter or LTI controller design problem in the dimensionless domain. The dimensionless gain-scheduling. Index Terms--Gain scheduling, gantry control, pi theorem, dimensionless parameters, nondimensional representation I. INTRODUCTION AIN scheduling is a popular method to control systems whose linearized model

Brennan, Sean

275

V-156: Linux Kernel Array Bounds Checking Flaw Lets Local Users Gain  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists' Research Petroleum ReserveDepartmentScripting Attacks | Department ofElevated

276

U-128: VMware ESX/ESXi Buffer Overflow and Null Pointer Dereference...  

Broader source: Energy.gov (indexed) [DOE]

system can trigger a buffer overflow or null pointer dereference in the display drivers to execute arbitrary code on the target system with elevated privileges. A null...

277

T-565: Vulnerability in Microsoft Malware Protection Engine Could...  

Broader source: Energy.gov (indexed) [DOE]

5: Vulnerability in Microsoft Malware Protection Engine Could Allow Elevation of PrivilegeVulnerability T-565: Vulnerability in Microsoft Malware Protection Engine Could Allow...

278

Rangeland -- Plant responses to elevated CO{sub 2}. Progress report  

SciTech Connect (OSTI)

Several broad conclusions which can be drawn from the work that was accomplished during the first 3-year phase of the study is described. In prairie ecosystems dominated by C{sub 4} grasses, it is likely that elevated atmospheric CO{sub 2} will increase ecosystem level productivity, with a greater increase in belowground productivity. The increased productivity will primarily result from increased water use efficiency due to the anti-transpirant action of CO{sub 2}. Fumigation chambers are directly confounded with elevated CO{sub 2} effects, in that both reduce evapotranspiration. The reduced evapotranspiration of the fumigation chamber is primarily through reduced wind speeds and reduced radiation. In very dry years, fumigation chamber effects are negligible, but in years with normal precipitation, chamber effects and elevated CO{sub 2} effects are essentially equal with respect to reduced evapotranspiration effects. Increased production under elevated CO{sub 2} results in reduced nitrogen concentration in the herbage and increased fiber concentrations. Consequently, digestibility of the herbage is reduced, and microbial degradation of surface litter and soil organic matter is slowed. On the negative side, ruminant productivity will likely be reduced substantially, but increased carbon storage in the soil may buffer against future rise in atmospheric CO{sub 2}. Tallgrass prairie will not likely change greatly in botanical composition, since the C{sub 4} dominants responded to elevated CO{sub 2} more than the C{sub 3} subdominants.

Owensby, C.E.; Coyne, P.I.; Ham, J.M.; Parton, W.; Rice, C.; Auen, L.M.; Adam, N.

1992-10-01T23:59:59.000Z

279

Elevation of surficial sediment/basalt contact in the Subsurface Disposal Area, Idaho National Engineering Laboratory  

SciTech Connect (OSTI)

The elevation of the surficial sediment/basalt contact at the Subsurface Disposal Area (SDA), within the Radioactive Waste Management Complex (RWMC) is presented to provide a data base for future remedial actions at this site. About 1,300 elevation data from published and unpublished reports, maps, and surveyors notes were compiled to generate maps and cross-sections of the surficial sediment/basalt contact. In general, an east to west trending depression exists in the south central portion of the SDA with basalt closer to land surface on the northern and southern boundaries of the SDA. The lowest elevation of the surficial sediment/basalt contact is 4,979 ft and the greatest is land surface at 5,012 ft. The median elevation of the sediment/basalt interface is 4,994 ft. The median depth to basalt in the SDA is 16 ft if land surface elevation is assumed to be 5,010 ft. The depth from land surface to the sediment/basalt interface ranges from 24 ft in the southeast corner of the SDA to less than 3 ft at the north-central boundary of the SDA.

Hubbell, J.M.

1993-05-13T23:59:59.000Z

280

Second quarter trims earnings gain of OGJ group of U. S. oil companies  

SciTech Connect (OSTI)

This paper reports that first half of 1991 profits for the Oil and Gas Journal group of 22 large U.S. oil companies totaled $10,553 billion, down a scant 0.1% from the same period the year before. However, second quarter profits were down sharply, dipping to $3.656 billion or 27.4% below the second quarter of 1990. This is in sharp contrast with first quarter profits, which totaled $6.897 billion and were up 24.8% from the same period of 1990. First half individuals results were widely diverse, with seven companies showing profit improvements from last year and 15 companies a decline. Only one, Murphy Oil Co., posted a loss in the first half. Six companies showed profit gains of more than 20% and 11 posted declines greater than 20%. In the second quarter 16 of the group had lower earnings than they booked in the same period of 1990. Restructuring charges and gains, along with provisions for future environmental costs, continued to have a great deal of influence over year to year changes in profits. Chemical earnings were down for the 6 months and in the second quarter for most companies. U.S. refining and marketing earnings were mixed but generally lower for both periods. Due to an economic recession product demand was down in the first half of this year. Non-U.S. refining and marketing profits were up for the first half, but the gain stemmed from improved margins in the first quarter.

Beck, R.J.; Biggs, J.B.

1991-09-02T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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

Gain broadening mechanism in various GaAlAs laser structures  

SciTech Connect (OSTI)

Coupling of an external grating to a GaAlAs laser results in a strong enhancement of the selected mode and a reduction of the nonselected modes. The spectral form of this reduction is measured with a new sensitive experimental arrangement for three types of laser structures: proton bombarded stripe geometry, V-groove and CSP lasers. This spectral form is determined by the gain curve of the laser only and is independent on the position of the selected mode, i.e., no spectral hole burning is observed at room temperature.

Ruehle, W.; Brosson, P.

1980-11-01T23:59:59.000Z

282

High-gain dc SQUID magnetometers with NbN nanobridges  

SciTech Connect (OSTI)

This paper reports on high-gain dc SQUIDs using NbN nanobridges fabricated for magnetometers with high sensitivity, and their device parameters and intrinsic energy sensitivity have been evaluated. The slit inductance of the square washer SQUID was reduced by using the co-planar edge structure of the low inductance. The junction capacitance was typically 15 {approximately} 40 ft. The maximum voltage modualtion was about 110 {mu}V for the NbN nanobridge SQUID with an inductance of 0.18nH.

Irie, A.; Hamasaki, K.; Yamashita, T. (Dept. of Electronics, Nagaoka Univ. of Technology, Kamitomioka-Machi 1603-1, Nagoka-shi, Niigata 940-21 (JP)); Matsui, T.; Komiyama, B. (Communication Research Lab., Ministry of Posts and Telecommunication, Koganei, Tokyo 184 (JP))

1991-03-01T23:59:59.000Z

283

Method and system for modulation of gain suppression in high average power laser systems  

DOE Patents [OSTI]

A high average power laser system with modulated gain suppression includes an input aperture associated with a first laser beam extraction path and an output aperture associated with the first laser beam extraction path. The system also includes a pinhole creation laser having an optical output directed along a pinhole creation path and an absorbing material positioned along both the first laser beam extraction path and the pinhole creation path. The system further includes a mechanism operable to translate the absorbing material in a direction crossing the first laser beam extraction laser path and a controller operable to modulate the second laser beam.

Bayramian, Andrew James (Manteca, CA)

2012-07-31T23:59:59.000Z

284

Frequency dependence of mass flow gain factor and cavitation compliance of cavitating inducers  

SciTech Connect (OSTI)

Unsteady cavitation characteristics are analyzed based on a closed cavity model in which the length of the cavity is allowed to oscillate. It is shown that the present model blends smoothly into quasisteady calculations in the low frequency limit, unlike fixed cavity length models. Effects of incidence angle and cavitation number on cavitation compliance and mass flow gain factor are shown as functions of reduce frequency. The cavity volume is evaluated by three methods and the results were used to confirm the accuracy and adequacy of the numerical calculation. By comparison with experimental data on inducers, it was shown that the present model can simulate the characteristics of unsteady cavitation qualitatively.

Otsuka, S.; Tsujimoto, Yoshinobu [Osaka Univ. (Japan); Kamijo, Kenjiro [National Aerospace Lab., Kakuda, Miyagi (Japan). Kakuda Research Center; Furuya, O. [AMP Technologies, Osaka (Japan)

1994-12-31T23:59:59.000Z

285

High-Gain Harmonic Generation Free-Electron Laser at Saturation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun withconfinement plasmas in thein the Assembly ofNa-ionInnovationGain Harmonic

286

Grain quality impacts of prohibiting recombination recirculation dust at export grain elevators  

E-Print Network [OSTI]

such as those where grain moves from one belt conveyor to another, one auger to another, into and out of a bucket elevator, or into and out of storage bins. Typically, a cloud of dust is created at each transfer point. Since this dust cloud.... Dust ventilation is energy intensive and can account for a large portion (one-third to one-half) of an elevator's electrical energy cost (Whitelock, 1991). National Grain and Feed Association (1981) and National Materials Advisory Board (1982) have...

Spillmann, Daryl Drew

1992-01-01T23:59:59.000Z

287

Radiation-induced gain degradation in lateral PNP BJTs with lightly and heavily doped emitters  

SciTech Connect (OSTI)

Ionizing radiation may cause failures in ICs due to gain degradation of individual devices. The base current of irradiated bipolar devices increases with total dose, while the collector current remains relatively constant. This results in a decrease in the current gain. Lateral PNP (LPNP) transistors typically exhibit more degradation than vertical PNP devices at the same total dose, and have been blamed as the cause of early IC failures at low dose rates. It is important to understand the differences in total-dose response between devices with heavily- and lightly-doped emitters in order to compare different technologies and evaluate the applicability of proposed low-dose-rate hardness-assurance methods. This paper addresses these differences by comparing two different LPNP devices from the same process: one with a heavily-doped emitter and one with a lightly-doped emitter. Experimental results demonstrate that the lightly-doped devices are more sensitive to ionizing radiation and simulations illustrate that increased recombination on the emitter side of the junction is responsible for the higher sensitivity.

Wu, A. [Univ. of Arizona, Tucson, AZ (United States); Schrimpf, R.D. [Vanderbilt Univ., Nashville, TN (United States); Pease, R.L. [RLP Research, Inc., Albuquerque, NM (United States); Fleetwood, D.M. [Sandia National Labs., Albuquerque, NM (United States); Kosier, S.L. [VTC Inc., Bloomington, MN (United States)

1997-06-01T23:59:59.000Z

288

Gains and losses in the eyes of the beholder: a comparative study of foreign policy decision making under risk  

E-Print Network [OSTI]

Prospect theory is a descriptive model of individual decision-making under risk (Kahneman and Tversky 1979). The central tenet of prospect theory posits that the risk orientation of decision-makers is affected by the gains vs. losses domains...

Yang, Yi

2006-04-12T23:59:59.000Z

289

Emotional intelligence and manipulation: Are those scoring higher on EI measures more likely to negatively manipulate others' for personal gains?  

E-Print Network [OSTI]

The association between emotional intelligence (EI) and manipulation was examined in this study. The possibility that individuals who score higher on EI would be more likely to negatively manipulate others for personal gain was the main hypothesis...

Carter, Sophie

2013-01-01T23:59:59.000Z

290

Structure of the eastern Red Rocks and Wind Ridge thrust faults, Wyoming: how a thrust fault gains displacement along strike  

E-Print Network [OSTI]

STRUCTURE OF THE EASTERN RED ROCKS AND WIND RIDGE THRUST FAULTS, WYOMING: HOW A THRUST FAULT GAINS DISPLACEMENT ALONG STRIKE A Thesis by BRENT STANLEY HUNTSMAN Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1983 Major Subject: Geology STRUCTURE OF THE EASTERN RED ROCKS AND WIND RIDGE THRUST FAULTS, WYOMING: HOW A THRUST FAULT GAINS DISPLACEMENT ALONG STRIKE A Thesis by BRENT STANLEY HUNTSMAN...

Huntsman, Brent Stanley

1983-01-01T23:59:59.000Z

291

Boonea (= Odostomia) impressa (Say) (Gastropoda: Pyramidellidae): its life history and impact on shell weight gain in Crassostrea virginica  

E-Print Network [OSTI]

Boonea (= Odostomia) impressa (SAY) (GASTROPODA: PYRAMIDELLIDAE): ITS LIFE HISTORY AND IMPACT ON SHELL WEIGHT GAIN IN Crassostrea virginica A Thesis by MARIE ELINOR WHITE Submitted to the Graduate College of Texas Agdi University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1983 Major Subject: Oceanography Boonea (= Odostomia) impressa (SAY) (GASTROPODA: PYRAMIDELLIDAE): ITS LIFE HISTORY AND IMPACT ON SHELL WEIGHT GAIN IN Crassostrea virginica A...

White, Marie Elinor

1983-01-01T23:59:59.000Z

292

CARIBBEAN DIGITAL ELEVATION MODELS Coastal Models Supporting our Nation's Needs through Science and Technology  

E-Print Network [OSTI]

CARIBBEAN DIGITAL ELEVATION MODELS Coastal Models Supporting our Nation's Needs through Science the Technical Reports developed for each DEM, available online. #12;CARIBBEAN ISLANDS The Caribbean is much more. People who live in communities in the Caribbean, especially in low-lying develop- ments along the coast

293

Elevated Frequency of Cataracts in Birds from Chernobyl Timothy Alexander Mousseau1  

E-Print Network [OSTI]

Elevated Frequency of Cataracts in Birds from Chernobyl Timothy Alexander Mousseau1 , Anders Pape typical of cataracts in more than 1100 free-living birds in the Chernobyl region in relation to background Chernobyl. PLoS ONE 8(7): e66939. doi:10.1371/journal.pone.0066939 Editor: Jordi Moya-Larano, Estacion

Mousseau, Timothy A.

294

Capacity fade of Sony 18650 cells cycled at elevated temperatures Part II. Capacity fade analysis  

E-Print Network [OSTI]

Capacity fade of Sony 18650 cells cycled at elevated temperatures Part II. Capacity fade analysis P August 2002 Abstract A complete capacity fade analysis was carried out for Sony 18650 cells cycled the other losses. # 2002 Elsevier Science B.V. All rights reserved. Keywords: Capacity fade; Sony 18650

Popov, Branko N.

295

Capacity fade of Sony 18650 cells cycled at elevated temperatures Part I. Cycling performance  

E-Print Network [OSTI]

Capacity fade of Sony 18650 cells cycled at elevated temperatures Part I. Cycling performance P of Sony 18650 Li-ion cells increases with increase in temperature. After 800 cycles, the cells cycled the capacity fade of commercial Li-ion cells cycled at high temperatures. We choose Sony 18650 cells with Li

Popov, Branko N.

296

Appending High-Resolution Elevation Data to GPS Speed Traces for Vehicle Energy Modeling and Simulation  

SciTech Connect (OSTI)

Accurate and reliable global positioning system (GPS)-based vehicle use data are highly valuable for many transportation, analysis, and automotive considerations. Model-based design, real-world fuel economy analysis, and the growing field of autonomous and connected technologies (including predictive powertrain control and self-driving cars) all have a vested interest in high-fidelity estimation of powertrain loads and vehicle usage profiles. Unfortunately, road grade can be a difficult property to extract from GPS data with consistency. In this report, we present a methodology for appending high-resolution elevation data to GPS speed traces via a static digital elevation model. Anomalous data points in the digital elevation model are addressed during a filtration/smoothing routine, resulting in an elevation profile that can be used to calculate road grade. This process is evaluated against a large, commercially available height/slope dataset from the Navteq/Nokia/HERE Advanced Driver Assistance Systems product. Results will show good agreement with the Advanced Driver Assistance Systems data in the ability to estimate road grade between any two consecutive points in the contiguous United States.

Wood, E.; Burton, E.; Duran, A.; Gonder, J.

2014-06-01T23:59:59.000Z

297

Elevated CO2 and O3 Alter Soil Nitrogen Transformations beneath  

E-Print Network [OSTI]

Elevated CO2 and O3 Alter Soil Nitrogen Transformations beneath Trembling Aspen, Paper Birch, North Carolina 27695, USA ABSTRACT Nitrogen cycling in northern temperate forest ecosystems could change to a negative feed- back on N availability. Key words: Acer saccharum; Betula papyrifera; Carbon dioxide; FACE

298

Figure 1. Elevation View of TPX Core including IR TV locations and view of plasma  

E-Print Network [OSTI]

stabilizer plates PPPL-3130 - Preprint Date: August 1995 TPX Diagnostics for Tokamak Operation, Plasma. First plasma is scheduled for mid-2001. Diagnostics are required for real time plasma control, physicsFigure 1. Elevation View of TPX Core including IR TV locations and view of plasma through

299

Brief Communication High temperature pulses decrease indirect chilling injury and elevate ATP levels  

E-Print Network [OSTI]

Brief Communication High temperature pulses decrease indirect chilling injury and elevate ATP: Received 20 December 2009 Accepted 8 March 2010 Available online 15 March 2010 Keywords: ATP Energy supply by determining survival rates and ATP levels for flies that had undergone continuous long-term exposure at 0 °C

Lee Jr., Richard E.

300

Reduced thermal resistance of the silicon-synthetic diamond composite substrates at elevated temperatures  

E-Print Network [OSTI]

/Si sub- strates, depends on the polycrystalline-diamond grain size, diamond layer thicknessReduced thermal resistance of the silicon-synthetic diamond composite substrates at elevated of synthetic diamond-silicon composite substrates. Although composite substrates are more thermally resistive

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


301

Elevated thermal maturation in Pennsylvanian rocks, Cherokee basin, southeastern Kansas: Importance of regional fluid flow  

SciTech Connect (OSTI)

Thermal history of sedimentary basins is commonly assumed to be dominated by burial heating. Marked contrast between reconstructed burial temperatures and other temperature determinations would suggest alternative processes. In the Cherokee basin of southeastern Kansas, reconstruction of burial and thermal history indicates that basal Pennsylvanian strata were not buried more than 1.8 km, and should have reached only about 90C. However, the study of Pennsylvanian rocks of the Cherokee basin indicates that higher temperatures were reached and that the pattern of thermal maturation is inconsistent with simple burial heating. Regional pattern of vitrinite reflectance reveals several warm spots' where thermal maturation is elevated above the regional background. Primary fluid inclusions in late Ca-Mg-Fe carbonate cements yield homogenization-temperature modes or petrographically consistent populations ranging from 100 to 150C. These data suggest that the samples experienced at least those temperatures, hence fluid inclusions closely agree with vitrinite and Rock-Eval. Elevated temperatures, warm spots, confined thermal spikes, a low R{sub m} gradient argue against simple burial heating. These observations are consistent with regional invasion of warm fluids, probably from the Ouachita-Arkoma system, and their subsequent upward migration into Pennsylvanian strata through faults and fractures. Petroleum exploration should consider the possibility of regionally elevated thermal maturation levels with even more elevated local maxima. Consequences may include local generation of hydrocarbons or local changes in diagenetic patterns.

Wojcik, K.M.; Goldstein, R.H.; Walton, A.W. (Univ. of Kansas, Lawrence (United States)); Barker, C.E. (Geological Survey, Denver, CO (United States))

1991-03-01T23:59:59.000Z

302

resource surveys indicate a species has elevated levels ofan element, additional  

E-Print Network [OSTI]

was shipped to Japan for human consumption) was delivered to the reduction industry. The total supply offish raw stock to the fish meal and oil industry (which includes Norway pout and sandeel) during the firstresource surveys indicate a species has elevated levels ofan element, additional samples

303

Effect of Elevated Curing Temperature on Early Hydration and Microstructure of Composite Cements  

E-Print Network [OSTI]

Effect of Elevated Curing Temperature on Early Hydration and Microstructure of Composite Cements J, Seascale, Cumbria, CA20 1PG, UK Abstract The heat of hydration of a number of composite cement systems has of composite cements based on the partial replacement of Portland cement by waste materials has become

Sheffield, University of

304

Elevated CO2 levels affect development, motility, and fertility and extend life  

E-Print Network [OSTI]

Elevated CO2 levels affect development, motility, and fertility and extend life span August 5, 2008) Hypercapnia (high CO2 levels) occurs in a number of lung diseases and it is associated the response to nonanesthetic CO2 levels and show that levels exceeding 9% induce aberrant motility

Morimoto, Richard

305

Author's personal copy Antioxidant capacity reduced in scallions grown under elevated CO2  

E-Print Network [OSTI]

Author's personal copy Antioxidant capacity reduced in scallions grown under elevated CO2 was used as a model plant to study the impact of a range of CO2 concentrations and light intensities in controlled environmental chambers under a combination of 3 CO2 concentrations of 400, 1200 and 4000 lmol mol

Paré, Paul W.

306

Processing and Characterization of NiTi Porous SMA by Elevated Pressure Sintering  

E-Print Network [OSTI]

metallurgy, sintering, quasi- static loading, impact loading, HIP, Self-propagating High temperature memory alloys (SMAs) from elemental powders. These include conventional sintering, Self-propagating High temperature Synthesis (SHS), and sintering at elevated pressure via a Hot Isostatic Press (HIP). Conventional

307

Svalbard glacier elevation changes and contribution to sea level rise Christopher Nuth,1  

E-Print Network [OSTI]

Svalbard glacier elevation changes and contribution to sea level rise Christopher Nuth,1 Geir contribution to global sea level rise of 0.026 mm yr?1 sea level equivalent. Citation: Nuth, C., G. Moholdt, J level rise, J. Geophys. Res., 115, F01008, doi:10.1029/2008JF001223. 1. Introduction [2] The most recent

Kääb, Andreas

308

Elevated East Antarctic outlet glaciers during warmer-than-present climates in southern Victoria Land  

E-Print Network [OSTI]

Elevated East Antarctic outlet glaciers during warmer-than-present climates in southern Victoria August 2011 Keywords: McMurdo Dry Valleys Taylor Dome Taylor Glacier cosmogenic Pliocene Pleistocene We document Plio-Pleistocene changes in the level of Taylor Glacier, an outlet glacier in southern Victoria

Marchant, David R.

309

Near-Infrared Laser Absorption of Poly(vinyl chloride) at Elevated Temperatures  

E-Print Network [OSTI]

Near-Infrared Laser Absorption of Poly(vinyl chloride) at Elevated Temperatures James D. Van de Ven, unpigmented state are highly transmissive of light in the near-infrared range, thus allowing laser of light detection [2, 3]. Within the near-infrared region nat- ural polymers have nearly no absorption [2

Van de Ven, James D.

310

ORIGINAL PAPER Effects of elevated CO2 and soil water content on phytohormone  

E-Print Network [OSTI]

of droughts this century (Meehl et al. 2007). Typically, drought reduces yield and agricultural productivityORIGINAL PAPER Effects of elevated CO2 and soil water content on phytohormone transcript induction Science+Business Media B.V. 2012 Abstract Plants will experience increased atmospheric CO2 and drought

DeLucia, Evan H.

311

Elevated freestream turbulence effects on heat transfer for a gas turbine vane  

E-Print Network [OSTI]

turbine airfoil, particularly for the first stage nozzle guide vane. For this study, augmentations. To incorporate all of the variables affecting boundary layer development on gas turbine airfoils, studies needElevated freestream turbulence effects on heat transfer for a gas turbine vane K.A. Thole a,*, R

Thole, Karen A.

312

Elevated Trace Element Concentrations in Southern Toads, Bufo terrestris, Exposed to Coal Combustion Waste  

E-Print Network [OSTI]

Elevated Trace Element Concentrations in Southern Toads, Bufo terrestris, Exposed to Coal, and behavioral abnormalities in amphibians to coal combustion wastes (coal ash). Few studies, however, have determined trace element concentrations in amphibians exposed to coal ash. In the current study we compare

Hopkins, William A.

313

Many-body effects on optical gain in GaAsPN/GaPN quantum well lasers for silicon integration  

SciTech Connect (OSTI)

Many-body effects on the optical gain in GaAsPN/GaP QW structures were investigated by using the multiband effective-mass theory and the non-Markovian gain model with many-body effects. The free-carrier model shows that the optical gain peak slightly increases with increasing N composition. In addition, the QW structure with a larger As composition shows a larger optical gain than that with a smaller As composition. On the other hand, in the case of the many-body model, the optical gain peak decreases with increasing N composition. Also, the QW structure with a smaller As composition is observed to have a larger optical gain than that with a larger As composition. This can be explained by the fact that the QW structure with a smaller As or N composition shows a larger Coulomb enhancement effect than that with a larger As or N composition. This means that it is important to consider the many-body effect in obtaining guidelines for device design issues.

Park, Seoung-Hwan, E-mail: shpark@cu.ac.kr [Department of Electronics Engineering, Catholic University of Daegu, Hayang, Kyeongbuk 712-702 (Korea, Republic of)

2014-02-14T23:59:59.000Z

315

Hodges residence: performance of a direct gain passive solar home in Iowa  

SciTech Connect (OSTI)

Results are presented for the performance of the Hodges Residence, a 2200-square-foot earth-sheltered direct gain passive solar home in Ames, Iowa, during the 1979-80 heating season, its first occupied season. No night insulation was used on its 500 square feet of double-pane glass. Total auxiliary heat required was 43 GJ (41 MBTU) gross and 26 GJ (25 MBTU) net, amounting, respectively, to 60 and 36 kJ/C/sup 0/-day-m/sup 2/ (2.9 and 1.8 BTU/F/sup 0/-day-ft/sup 2/). The heating season was unusually cloudy and included the cloudiest January in the 21 years of Ames insolation measurements. Results are also presented for the performance of the hollow-core floor which serves as the main storage mass and for the comfort range in the house.

Hodges, L.

1980-01-01T23:59:59.000Z

316

Using Numerical Simulations to Gain Insight into the Structure of Superbubbles  

E-Print Network [OSTI]

Recent high resolution observations of Galactic superbubbles have motivated us to re-examine several classes of superbubble models. We compare three classes of hydrodynamic models (the Kompaneets approximation, the thin shell model, and numerical simulations) in order to understand the structure of superbubbles and to gain insight into observations. In particular, we apply models to the W4 superbubble, which has been observed in the Pilot project of the arcminute resolution Canadian Galactic Plane Survey (Normandeau et al. 1996). Magnetohydrodynamic simulations are also performed and point the way to a fuller understanding of the W4 superbubble. We suggest that the highly collimated bubble and apparent lack of a Rayleigh-Taylor instability in the superbubble shell can be explained by the presence of a magnetic field.

Philip T. Komljenovic; Shantanu Basu; Doug Johnstone

1999-01-21T23:59:59.000Z

317

Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash  

DOE Patents [OSTI]

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention provides a method for increasing the rate of strength gain of a hardenable mixture containing fly ash by exposing the fly ash to an aqueous slurry of calcium oxide (lime) prior to its incorporation into the hardenable mixture. The invention further relates to such hardenable mixtures, e.g., concrete and mortar, that contain fly ash pre-reacted with calcium oxide. In particular, the fly ash is added to a slurry of calcium oxide in water, prior to incorporating the fly ash in a hardenable mixture. The hardenable mixture may be concrete or mortar. In a specific embodiment, mortar containing fly ash treated by exposure to an aqueous lime slurry are prepared and tested for compressive strength at early time points. 2 figs.

Liskowitz, J.W.; Wecharatana, M.; Jaturapitakkul, C.; Cerkanowicz, A.E.

1997-10-28T23:59:59.000Z

318

Antenna Gain and Link Budget for Waves Carrying Orbital Angular Momentum (OAM)  

E-Print Network [OSTI]

This paper addresses the RF link budget of a communication system using unusual waves carrying an orbital angular momentum (OAM) in order to clearly analyse the fundamental changes for telecommunication applications. The study is based on a typical configuration using circular array antennas to transmit and receive OAM waves. For any value of the OAM mode order, an original asymptotic formulation of the link budget is proposed in which equivalent antenna gains and free-space losses appear. The formulations are then validated with the results of a commercial electromagnetic simulation software. By this way, we also show how our formula can help to design a system capable of superimposing several channels on the same bandwidth and the same polarisation, based on the orthogonality of the OAM. Additional losses due to the use of this degree of freedom are notably clearly calculated to quantify the benefit and drawback according to the case.

Nguyen, Duy Kevin; Sokoloff, Jrme; Chabory, Alexandre; Palacin, Baptiste; Capet, Nicolas

2015-01-01T23:59:59.000Z

319

Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash  

DOE Patents [OSTI]

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention provides a method for increasing the rate of strength gain of a hardenable mixture containing fly ash by exposing the fly ash to an aqueous slurry of calcium oxide (lime) prior to its incorporation into the hardenable mixture. The invention further relates to such hardenable mixtures, e.g., concrete and mortar, that contain fly ash pre-reacted with calcium oxide. In particular, the fly ash is added to a slurry of calcium oxide in water, prior to incorporating the fly ash in a hardenable mixture. The hardenable mixture may be concrete or mortar. In a specific embodiment, mortar containing fly ash treated by exposure to an aqueous lime slurry are prepared and tested for compressive strength at early time points.

Liskowitz, John W. (Belle Mead, NJ); Wecharatana, Methi (Parsippany, NJ); Jaturapitakkul, Chai (Bangkok, TH); Cerkanowicz, deceased, Anthony E. (late of Livingston, NJ)

1997-01-01T23:59:59.000Z

320

Diurnal heat storage in direct-gain passive-solar buildings  

SciTech Connect (OSTI)

This paper presents a simplified method for predicting temperature swings in direct-gain buildings. It is called the DHC method due to the use of a diurnal heat capacity (DHC). Diurnal heat capacity is a measure of the effective amount of heat stored during a sunny day and then released at night - the typical 24-hour diurnal cycle. This enables prediction of the maximum temperature swings experienced in the building and can be calculated using a single 24-hour harmonic. The advantage is that closed-form analytic solutions can be obtained for a variety of simple and layered-wall configurations. Higher harmonic components are accounted for by a correction factor. The method is suitable for us by hand or on a programmable calculator.

Balcomb, J.D.; Neeper, D.A.

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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

Advances in the mapping of flow networks from digital elevation data David G Tarboton* and Daniel P Ames**  

E-Print Network [OSTI]

computer power available in personal computers with the capability to rapidly download and process digital1 Advances in the mapping of flow networks from digital elevation data David G Tarboton* and Daniel Congress, May 20- 24,2001, Orlando, Florida.] Abstract Digital elevation models (DEMs) are a useful data

Tarboton, David

322

Effect of elevated CO2 and N fertilisation on soil nematode abundance and diversity in a wheat field  

E-Print Network [OSTI]

Author's personal copy Effect of elevated CO2 and N fertilisation on soil nematode abundance). The soil food chain response to elevated CO2 can indicate the changes in soil ecological processes s t r a c t An experimental platform of free-air CO2 enrichment (FACE) was established in mid June

Neher, Deborah A.

323

Prediction of nonlinear structural response in LMFBR elevated-temperature piping  

SciTech Connect (OSTI)

The development of structural analysis capabilities to investigate possible accident initiations caused by structural degradation of liquid metal fast breeder reactor (LMFBR) piping is summarized. The ABAQUS finite element code is used to perform a nonlinear analysis of a bench mark problem proposed by the Pressure Vessel Research Committee. The problem is representative both in geometry and loading of an LMFBR elevated-temperature piping system, and published analytical results are available for comparison. Results show the system to be most sensitive to large, radial, thermal gradients that occur when the system experiences certain thermal transients. Repeated cycles of these transients will lead to thermal ratcheting, causing progressive deformation and strain accumulation in the system. Future work will verify the accuracy of the finite element model and quantify damage accumulated during the lifetime of an LMFBR elevated-temperature piping system.

Farrar, C.

1984-06-01T23:59:59.000Z

324

Characterization of elevated temperature crack growth in Hastelloy-X using integral parameters  

SciTech Connect (OSTI)

Linear elastic fracture mechanics approaches are not suitable for prediction of fatigue crack growth in the nonlinear regime at elevated temperatures. The objective of this paper is to investigate the ability of the integral parameters by Blackburn (J*), by Kishimoto et al. ({cflx J}), and by Atluri et al. ({Delta}Tp*, {Delta}Tp) to correlate crack growth data of Hastelloy-X at elevated temperatures under nominally elastic and nominally plastic loading. Crack growth is analyzed using a finite element method, and the integral parameters are computed from the results of analysis. The experimental crack growth rates are correlated with these parameters. It is found that J*, {cflx J}, and {Delta}Tp* can correlate crack growth data within an acceptable accuracy.

Kim, K.S. [Pohang Univ. of Science and Technology (Korea, Republic of). Dept. of Mechanical Engineering; Van Stone, R.H. [General Electric Aircraft Engines, Cincinnati, OH (United States)

1995-07-01T23:59:59.000Z

325

SALTSTONE DISPOSAL FACILITY: DETERMINATION OF THE PROBABLE MAXIMUM WATER TABLE ELEVATION  

SciTech Connect (OSTI)

A coverage depicting the configuration of the probable maximum water table elevation in the vicinity of the Saltstone Disposal Facility (SDF) was developed to support the Saltstone program. This coverage is needed to support the construction of saltstone vaults to assure that they remain above the maximum elevation of the water table during the Performance Assessment (PA) period of compliance. A previous investigation to calculate the historical high water table beneath the SDF (Cook, 1983) was built upon to incorporate new data that has since become available to refine that estimate and develop a coverage that could be extended to the perennial streams adjacent to the SDF. This investigation incorporated the method used in the Cook, 1983 report to develop an estimate of the probable maximum water table for a group of wells that either existed at one time at or near the SDF or which currently exist. Estimates of the probable maximum water table at these wells were used to construct 2D contour lines depicting this surface beneath the SDF and extend them to the nearby hydrologic boundaries at the perennial streams adjacent to the SDF. Although certain measures were implemented to assure that the contour lines depict a surface above which the water table will not rise, the exact elevation of this surface cannot be known with complete certainty. It is therefore recommended that the construction of saltstone vaults incorporate a vertical buffer of at least 5-feet between the base of the vaults and the depicted probable maximum water table elevation. This should provide assurance that the water table under the wet extreme climatic condition will never rise to intercept the base of a vault.

Hiergesell, R

2005-04-01T23:59:59.000Z

326

Numerical investigation into the injection-locking phenomena of gain switched lasers for optical frequency comb generation  

E-Print Network [OSTI]

We present detailed numerical simulations of the laser dynamics that describe optical frequency comb formation by injection-locking a gain-switched laser. The typical rate equations for semiconductor lasers including stochastic carrier recombination and spontaneous emission suffice to show the injection-locking behavior of gain switched lasers, and we show how the optical frequency comb evolves starting from the free-running state, right through the final injection- locked state. Unlike the locking of continuous wave lasers, we show that the locking range for gain switched lasers is considerably greater because injection locking can be achieved by injecting at frequencies close to one of the comb lines. The quality of the comb lines are formally assessed by calculating the FM-noise spectral density and we show that under injection-locking conditions the FM-noise spectral density of the comb lines tend to that of the maser laser.

Duill, Sean P O; Zhou, Rui; Barry, Liam P

2015-01-01T23:59:59.000Z

327

Lossless anomalous dispersion and an inversionless gain doublet via dressed interacting ground states  

SciTech Connect (OSTI)

Transparent media exhibiting anomalous dispersion have been of considerable interest since Wang, Kuzmich, and Dogariu [Nature 406, 277 (2000)] first observed light propagate with superluminal and negative group velocities without absorption. Here, we propose an atomic model exhibiting these properties, based on a generalization of amplification without inversion in a five-level dressed interacting ground-state system. The system consists of a {Lambda} atom prepared as in standard electromagnetically induced transparency (EIT), with two additional metastable ground states coupled to the {Lambda} atom ground states by two rf-microwave fields. We consider two configurations by which population is incoherently pumped into the ground states of the atom. Under appropriate circumstances, we predict a pair of new gain lines with tunable width, separation, and height. Between these lines, absorption vanishes but dispersion is large and anomalous. The system described here is a significant improvement over other proposals in the anomalous dispersion literature in that it permits additional coherent control over the spectral properties of the anomalous region, including a possible 10{sup 4}-fold increase over the group delay observed by Wang, Kuzmich, and Dogariu.

Weatherall, James Owen [Department of Physics and Engineering Physics, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030 (United States); Department of Mathematical Sciences, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030 (United States); Department of Logic and Philosophy of Science, University of California Irvine, 3151 Social Science Plaza A, Irvine, California 92697 (United States); Search, Christopher P. [Department of Physics and Engineering Physics, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030 (United States)

2010-02-15T23:59:59.000Z

328

Automatic Gain Control in Mass Spectrometry using a Jet Disrupter Electrode in an Electrodynamic Ion Funnel  

SciTech Connect (OSTI)

We report on the use of a jet disrupter electrode in an electrodynamic ion funnel as an electronic valve to regulate the intensity of the ion beam transmitted through the interface of a mass spectrometer in order to perform automatic gain control (AGC). The ion flux is determined by either directly detecting the ion current on the conductance limiting orifice of the ion funnel or using a short mass spectrometry acquisition. Based upon the ion flux intensity, the voltage of the jet disrupter is adjusted to alter the transmission efficiency of the ion funnel to provide a desired ion population to the mass analyzer. Ion beam regulation by an ion funnel is shown to provide an unbiased control to within a few percent of a targeted ion intensity or abundance. The utility of ion funnel AGC was evaluated using a protein tryptic digest analyzed with liquid chromatography Fourier transform ion cyclotron resonance (LC-FTICR) mass spectrometry. The ion population in the ICR cell was accurately controlled to a variety of different levels, which improved data quality and provided better mass measurement accuracy.

Page, Jason S.; Bogdanov, Bogdan; Vilkov, Andrey N.; Prior, David C.; Buschbach, Michael A.; Tang, Keqi; Smith, Richard D.

2005-02-01T23:59:59.000Z

329

Gain and tuning characteristics of mid-infrared InSb quantum dot diode lasers  

SciTech Connect (OSTI)

There have been relatively few reports of lasing from InSb quantum dots (QDs). In this work, type II InSb/InAs QD laser diodes emitting in the mid-infrared at 3.1??m have been demonstrated and characterized. The gain was determined to be 2.9?cm{sup ?1} per QD layer, and the waveguide loss was ?15?cm{sup ?1} at 4?K. Spontaneous emission measurements below threshold revealed a blue shift of the peak wavelength with increasing current, indicating filling of ground state heavy hole levels in the QDs. The characteristic temperature, T{sub 0}?=?101?K below 50?K, but decreased to 48?K at higher temperatures. The emission wavelength of these lasers showed first a blue shift followed by a red shift with increasing temperature. A hybrid structure was used to fabricate the laser by combining a liquid phase epitaxy grown p-InAs{sub 0.61}Sb{sub 0.13}P{sub 0.26} lower cladding layer and an upper n{sup +} InAs plasmon cladding layer which resulted in a maximum operating temperature (T{sub max}) of 120?K in pulsed mode, which is the highest reported to date.

Lu, Q.; Zhuang, Q.; Hayton, J.; Yin, M.; Krier, A. [Physics Department, Lancaster University, Lancaster LA1 4YB (United Kingdom)

2014-07-21T23:59:59.000Z

330

Impact of elevated CO2 on a Florida Scrub-oak Ecosystems  

SciTech Connect (OSTI)

Since May of 1996, we have conducted an experiment in Florida Scrub Oak to determine the impact of elevated atmospheric CO2 and climate change on carbon, water, and nutrient cycling in this important terrestrial ecosystem. Florida scrub oak is the name for a collective of species occupying much of the Florida peninsula. The dominant tree species are oaks and the dwarf structure of this community makes it an excellent system in which to test hypotheses regarding the potential capacity of woody ecosystems to assimilate and sequester anthropogenic carbon. Scrub oak is fire dependent with a return cycle of 10-15 years, a time which would permit an experiment to follow the entire cycle. Our site is located on Cape Canaveral at the Kennedy Space Center, Florida. After burning in 1995, we built 16 open top chambers, half of which have been fumigated with pure CO2 sufficient to raise the concentration around the plants to 350 ppm above ambient. In the intervening 10 years we have non destructively measured biomass of shoots and roots, ecosystem gas exchange using chambers and eddy flux, leaf photosynthesis and respiration, soil respiration, and relevant environmental factors such as soil water availability, temperature, light, etc. The overwhelming result from analysis of our extensive data base is that elevated CO2 has had a profound impact on this ecosystem that, overall, has resulted in increased carbon accumulation in plant shoots, roots and litter. Our measurements of net ecosystem gas exchange also indicate that the ecosystem has accumulated carbon much in excess of the increased biomass or soil carbon suggesting a substantial export of carbon through the porous, sandy soil into the water table several meters below the surface. A major discovery is the powerful interaction between the stimulation of growth, photosynthesis, and respiration by elevated CO2 and other environmental factors particularly precipitation and nitrogen. Our measurements focused attention on: stimulation of ecosystem gas exchange by elevated atmospheric CO2; the architecture and distribution of coarse roots using the novel approach of ground penetrating radar; mechanisms for the disturbance of soil carbon pools via the "priming" effect; and how interannual and seasonal variation in precipitation alters the physiological response of key species to elevated CO2. This project was a collaboration between research groups at the Smithsonian Institution, NASA, the Dynamac Corporation, Northern Arizona University, and Old Dominion University in Norfolk, Virginia.

Drake, Bert G

2013-01-01T23:59:59.000Z

331

EUROPEAN TECHNOLOGY PLATFORM ON INDUSTRIAL SAFETY (ETPIS), A VISION TO GAIN SAFETY FOR A SUSTAINABLE INDUSTRY GROWTH  

E-Print Network [OSTI]

Safety (ETPIS). It is a result of a collective work made by research- ers from organisationsEUROPEAN TECHNOLOGY PLATFORM ON INDUSTRIAL SAFETY (ETPIS), A VISION TO GAIN SAFETY that consider industrial safety as a strategic issue for the sustainable growth of the European Industry

Paris-Sud XI, Université de

332

Measurement of positive gain on the 1315 nm transition of atomic iodine pumped by O2,,a1  

E-Print Network [OSTI]

state I 2 P3/2 . Conventionally, the O2 1 is produced by a liquid chemistry singlet oxygen generator of gain. 2004 American Institute of Physics. [DOI: 10.1063/1.1784519] The classic chemical oxygen the metastable excited singlet oxygen molecule, O2 a1 [de- noted O2 1 hereafter], and the iodine atom ground

Carroll, David L.

333

Fuzzy-Logic-Based Gain-Scheduling Control for State-of-Charge Balance of Distributed Energy  

E-Print Network [OSTI]

Fuzzy-Logic-Based Gain-Scheduling Control for State-of-Charge Balance of Distributed Energy Storage, the control strategy used in the microgrid must take into account the stored energy balance between strategy based on fuzzy logic that ensures balanced stored energy among distributed energy storage units

Vasquez, Juan Carlos

334

Guaranteed stability regions of linear systems with actuator saturation using the low-and-high gain technique  

E-Print Network [OSTI]

constraints. Although its introduction in (Lin & Saberi1993) was fairly modest, it has since been used on predictive control. The low-and-high gain technique was introduced in Lin & Saberi (1995) as a method ensuring that the region in which stability was guaranteed did not shrink. With the work in Lin & Saberi

Turner, Matthew C.

335

DFIG-Based Wind Turbine Robust Control Using High-Order Sliding Modes and a High Gain Observer  

E-Print Network [OSTI]

DFIG-Based Wind Turbine Robust Control Using High-Order Sliding Modes and a High Gain Observer with the power generation control in variable speed wind turbines. In this context, a control strategy is proposed to ensure power extraction optimization of a DFIG- based wind turbine. The proposed control

Brest, Université de

336

For natural ventilation to work, solar gains through the facade needed to be reduced by approximately 80% from  

E-Print Network [OSTI]

Engineers, Inc. Laboratory Consultant: Research Facilities Design Energy Modeling: SOLARC ArchitectureFor natural ventilation to work, solar gains through the facade needed to be reduced--largely due to the enormous ventilation demands and the energy associated with moving and conditioning

Hochberg, Michael

337

Femtosecond gain and index dynamics in an InAs/InGaAsP quantum dot amplifier  

E-Print Network [OSTI]

Femtosecond gain and index dynamics in an InAs/InGaAsP quantum dot amplifier operating at 1.55 µm and refractive index dynamics of an InAs/InGaAsP self-assembled quantum dot semiconductor optical amplifier (SOA-carrier absorption and stimulated transition processes. ©2006 Optical Society of America OCIS codes: (320

Mojahedi, Mohammad

338

Gain dynamics in a soft X-ray laser ampli er perturbed by a strong injected X-ray eld  

SciTech Connect (OSTI)

Seeding soft X-ray plasma ampli ers with high harmonics has been demonstrated to generate high-brightness soft X-ray laser pulses with full spatial and temporal coherence. The interaction between the injected coherent eld and the swept-gain medium has been modelled. However, no exper- iment has been conducted to probe the gain dynamics when perturbed by a strong external seed eld. Here, we report the rst X-ray pump X-ray probe measurement of the nonlinear response of a plasma ampli er perturbed by a strong soft X-ray ultra-short pulse. We injected a sequence of two time-delayed high-harmonic pulses (l518.9 nm) into a collisionally excited nickel-like molybdenum plasma to measure with femto-second resolution the gain depletion induced by the saturated ampli cation of the high-harmonic pump and its subsequent recovery. The measured fast gain recovery in 1.5 1.75 ps con rms the possibility to generate ultra-intense, fully phase-coherent soft X-ray lasers by chirped pulse ampli cation in plasma ampli ers.

Wang, Yong [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Wang, Shoujun [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Oliva, E [Laboratoire de Physique des Gaz et des Gaz et des Plasmas] [Laboratoire de Physique des Gaz et des Gaz et des Plasmas; Lu, L [Laboratoire de Physique des Gaz et des Gaz et des Plasmas] [Laboratoire de Physique des Gaz et des Gaz et des Plasmas; Berrill, Mark A [ORNL] [ORNL; Yin, Liang [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Nejdl, J [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Luther, Brad [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Proux, C [Laboratoire dOptique Appliquee, ENSTA, CNRS, Ecole Polytechnique] [Laboratoire dOptique Appliquee, ENSTA, CNRS, Ecole Polytechnique; Le, T. T. [Laboratoire de Physique des Gaz et des Gaz et des Plasmas] [Laboratoire de Physique des Gaz et des Gaz et des Plasmas; Dunn, James [Lawrence Livermore National Laboratory (LLNL)] [Lawrence Livermore National Laboratory (LLNL); Ros, D [Laboratoire de Physique des Gaz et des Gaz et des Plasmas] [Laboratoire de Physique des Gaz et des Gaz et des Plasmas; Zeitoun, Philippe [cole Polytechnique] [cole Polytechnique; Rocca, Jorge [Colorado State University, Fort Collins] [Colorado State University, Fort Collins

2014-01-01T23:59:59.000Z

339

Theoretical studies of optical gain tuning by hydrostatic pressure in GaInNAs/GaAs quantum wells  

SciTech Connect (OSTI)

In order to describe theoretically the tuning of the optical gain by hydrostatic pressure in GaInNAs/GaAs quantum wells (QWs), the optical gain calculations within kp approach were developed and applied for N-containing and N-free QWs. The electronic band structure and the optical gain for GaInNAs/GaAs QW were calculated within the 10-band kp model which takes into account the interaction of electron levels in the QW with the nitrogen resonant level in GaInNAs. It has been shown that this interaction increases with the hydrostatic pressure and as a result the optical gain for GaInNAs/GaAs QW decreases by about 40% and 80% for transverse electric and transverse magnetic modes, respectively, for the hydrostatic pressure change from 0 to 40 kilobars. Such an effect is not observed for N-free QWs where the dispersion of electron and hole energies remains unchanged with the hydrostatic pressure. This is due to the fact that the conduction and valence band potentials in GaInAs/GaAs QW scale linearly with the hydrostatic pressure.

Gladysiewicz, M.; Wartak, M. S. [Institute of Physics, Wroclaw University of Technology, 50-370 Wroclaw, Wybrzeze Wyspianskiego 27 (Poland); Department of Physics and Computer Science, Wilfrid Laurier University, Waterloo, Ontario N2L 3C5 (Canada); Kudrawiec, R. [Institute of Physics, Wroclaw University of Technology, 50-370 Wroclaw, Wybrzeze Wyspianskiego 27 (Poland)

2014-01-21T23:59:59.000Z

340

TOWARDS AN ER-DOPED SI NANOCRYSTAL SENSITIZED WAVEGUIDE LASER THE THIN LINE BETWEEN GAIN AND LOSS  

E-Print Network [OSTI]

and waveguide. If the pump laser could somehow be eliminated from this scheme, the fabrication of low-cost SiTOWARDS AN ER-DOPED SI NANOCRYSTAL SENSITIZED WAVEGUIDE LASER ­ THE THIN LINE BETWEEN GAIN AND LOSS-doped SiO2, a composite material that can potentially be fabricated using a VLSI compatible process

Kik, Pieter

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


341

Towards an Er-doped Si nanocrystal sensitized waveguide laser the thin line between gain and loss  

E-Print Network [OSTI]

somehow be eliminated from this scheme, the fabrication of low-cost Si based Er doped optical amplifiers1 Towards an Er-doped Si nanocrystal sensitized waveguide laser ­ the thin line between gain-doped Si nanocrystal co-doped SiO2, a composite material that can potentially be fabricated using a VLSI

Polman, Albert

342

AbstractThis paper presents an implementation of a networked PI controller using a gain scheduling methodology  

E-Print Network [OSTI]

Abstract­This paper presents an implementation of a networked PI controller using a gain scheduling scheduling technique is also explained. The detail of networked PI controller implementation based on RTLinux such as state augmentation [2], optimal stochastic control [3], and sampling time scheduling [4]. Many

Chow, Mo-Yuen

343

Influence of digestibility of bulky forages in daily gains in penned steers using two levels of supplemented grain  

E-Print Network [OSTI]

Influence of digestibility of bulky forages in daily gains in penned steers using two levels Experimental Agropecuaria, 2700 Pergamino, Buenos Aires, Argentina Digestibility of bulky forages directly, 95-121). In general there is more information about high quality forage digestibility than about low

Paris-Sud XI, Universit de

344

A Combined High Gain Observer and High-Order Sliding Mode Controller for a DFIG-Based Wind  

E-Print Network [OSTI]

simulator FAST. Index Terms--Wind turbine (WT), Doubly-Fed Induction Generator (DFIG), high gain observer using the NREL wind turbine simulator FAST. II. WIND TURBINE MODELING The global scheme for a grid-connected shaft speed and thus maintaining optimal power generation. The more variable speed wind turbines

Paris-Sud XI, Université de

345

Control of linear modes in cylindrical resistive magnetohydrodynamics with a resistive wall, plasma rotation, and complex gain  

SciTech Connect (OSTI)

Feedback stabilization of magnetohydrodynamic (MHD) modes in a tokamak is studied in a cylindrical model with a resistive wall, plasma resistivity, viscosity, and toroidal rotation. The control is based on a linear combination of the normal and tangential components of the magnetic field just inside the resistive wall. The feedback includes complex gain, for both the normal and for the tangential components, and it is known that the imaginary part of the feedback for the former is equivalent to plasma rotation [J. M. Finn and L. Chacon, Phys. Plasmas 11, 1866 (2004)]. The work includes (1) analysis with a reduced resistive MHD model for a tokamak with finite ? and with stepfunction current density and pressure profiles, and (2) computations with a full compressible visco-resistive MHD model with smooth decreasing profiles of current density and pressure. The equilibria are stable for ??=?0 and the marginal stability values ?{sub rp,rw}?gain with normal sensors or plasma rotation stabilizes below ?{sub rp,iw} because rotation suppresses the diffusion of flux from the plasma out through the wall and, more surprisingly, (b) rotation or imaginary gain with normal sensors destabilizes above ?{sub rp,iw} because it prevents the feedback flux from entering the plasma through the resistive wall to form a virtual wall. A method of using complex gain G{sub i} to optimize in the presence of rotation in this regime with ??>??{sub rp,iw} is presented. The effect of imaginary gain with tangential sensors is more complicated but essentially destabilizes above and below ?{sub rp,iw}.

Brennan, D. P. [Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544 (United States); Finn, J. M. [Applied Mathematics and Plasma Physics, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2014-10-15T23:59:59.000Z

346

Shape of isolated domains in lithium tantalate single crystals at elevated temperatures  

SciTech Connect (OSTI)

The shape of isolated domains has been investigated in congruent lithium tantalate (CLT) single crystals at elevated temperatures and analyzed in terms of kinetic approach. The obtained temperature dependence of the growing domain shape in CLT including circular shape at temperatures above 190?C has been attributed to increase of relative input of isotropic ionic conductivity. The observed nonstop wall motion and independent domain growth after merging in CLT as opposed to stoichiometric lithium tantalate have been attributed to difference in wall orientation. The computer simulation has confirmed applicability of the kinetic approach to the domain shape explanation.

Shur, V. Ya., E-mail: vladimir.shur@usu.ru; Akhmatkhanov, A. R.; Baturin, I. S. [Ferroelectric Laboratory, Institute of Natural Sciences, Ural Federal University, 620000 Ekaterinburg (Russian Federation) [Ferroelectric Laboratory, Institute of Natural Sciences, Ural Federal University, 620000 Ekaterinburg (Russian Federation); Labfer Ltd., 620014 Ekaterinburg (Russian Federation); Chezganov, D. S.; Lobov, A. I.; Smirnov, M. M. [Ferroelectric Laboratory, Institute of Natural Sciences, Ural Federal University, 620000 Ekaterinburg (Russian Federation)] [Ferroelectric Laboratory, Institute of Natural Sciences, Ural Federal University, 620000 Ekaterinburg (Russian Federation)

2013-12-09T23:59:59.000Z

347

An investigation of the distribution of rainfall with elevation for selected stations in Ecuador  

E-Print Network [OSTI]

of the Data III. ANALYSIS PROCEDURES iv vi 1 1 2 6 7 11 14 17 A. Data B. Rainfall Zones C. Cross Sections D. Linear Rainfall Equations IV. PRESENTATION OF RESULTS A. The Major Rainfall Zones B. The Cross Sections C. The Rainfall... distribution of selected stations in Ecuador and to determine if a linear relationship exists between the mean annual rainfall amount and the station elevation. Furthermore, if a relationship does exist, an attempt will be made to develop an equation which...

Rumley, Glenn Bertham

1965-01-01T23:59:59.000Z

348

The Thermal Expansion, Elastic and Fracture Properties of Porous Cordierite at Elevated Temperatures  

SciTech Connect (OSTI)

The properties that determine the thermal shock resistance in materials are reported for porous cordierite, a leading candidate material for the fabrication of diesel particulate filters. Fracture toughness and slow crack growth tests were performed on test specimens obtained from the walls of diesel particulate filter monolithic substrates using the double-torsion test method at temperatures between 20 C and 900 C. The thermal expansion and elastic properties were characterized between 20 C and 1000 C. The role of the microstructure of porous cordierite in determining its unusual thermal expansion and elevated temperature Young's modulus and fracture toughness are discussed.

Shyam, Amit [ORNL; Lara-Curzio, Edgar [ORNL; Pandey, Amit [ORNL; Watkins, Thomas R [ORNL; More, Karren [Oak Ridge National Laboratory (ORNL)

2012-01-01T23:59:59.000Z

349

The degradation of TPX components by oxygen, elevated temperature, and ionizing radiation  

SciTech Connect (OSTI)

TPX is PMP or poly(4-methyl-1-pentene). It has several commercially important characteristics such as high optical transparency, high crystalline melting point, etc., leading to numerous applications including infrared windows, lenses, membranes, food packaging. The life components fabricated from this material may be limited by thermal oxidative and radiation-induced degradation. A preliminary review of the scientific literature was conducted to obtain relevant information on the effects of oxygen, moisture elevated temperature, and radiation on the chemical, thermodynamic, mechanical, and electrical properties of this material. Refs, figs, tabs.

Farmer, J.C.

1996-05-31T23:59:59.000Z

350

[Laser flash photolysis, EPR and Raman studies of liquids at elevated pressures  

SciTech Connect (OSTI)

The proposed research will solve a number of analytical chemical problems in solutions with measurement techniques that benefit from the use of elevated hydrostatic pressures: stopped-flow spectrophotometry (Gd[sup 3+] + L(ligand), [RuL[sub 5]H[sub 2]O][sup 2+], laser flash photolysis of Mo(CO)[sub 6] + L, flash photolysis of binuclear metalloproteins), EPR spectroscopy (Gd[sup 3+] ion-exchanged into ETS-10 and ETAS-10 molecular sieves), laser flash photolysis kinetic studies of Mo(CO)[sub 6]-2,2'-bipyridine, and electrochemical studies of metalloporphyrins using resonance Raman spectroscopy.

Eyring, E.M.

1992-01-01T23:59:59.000Z

351

[Laser flash photolysis, EPR and Raman studies of liquids at elevated pressures  

SciTech Connect (OSTI)

The proposed research will solve a number of analytical chemical problems in solutions with measurement techniques that benefit from the use of elevated hydrostatic pressures: stopped-flow spectrophotometry (Gd{sup 3+} + L(ligand), [RuL{sub 5}H{sub 2}O]{sup 2+}, laser flash photolysis of Mo(CO){sub 6} + L, flash photolysis of binuclear metalloproteins), EPR spectroscopy (Gd{sup 3+} ion-exchanged into ETS-10 and ETAS-10 molecular sieves), laser flash photolysis kinetic studies of Mo(CO){sub 6}-2,2`-bipyridine, and electrochemical studies of metalloporphyrins using resonance Raman spectroscopy.

Eyring, E.M.

1992-10-01T23:59:59.000Z

352

Note: A method for minimizing oxide formation during elevated temperature nanoindentation  

SciTech Connect (OSTI)

A standardized method to protect metallic samples and minimize oxide formation during elevated-temperature nanoindentation was adapted to a commercial instrument. Nanoindentation was performed on Al (100), Cu (100), and W (100) single crystals submerged in vacuum oil at 200 C, while the surface morphology and oxidation was carefully monitored using atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The results were compared to room temperature and 200 C nanoindentation tests performed without oil, in order to evaluate the feasibility of using the oil as a protective medium. Extensive surface characterization demonstrated that this methodology is effective for nanoscale testing.

Cheng, I. C.; Hodge, A. M., E-mail: ahodge@usc.edu [Department of Aerospace and Mechanical Engineering, University of Southern California, 3650 McClintock Avenue OHE430, Los Angeles, California 90089 (United States); Garcia-Sanchez, E. [Department of Aerospace and Mechanical Engineering, University of Southern California, 3650 McClintock Avenue OHE430, Los Angeles, California 90089 (United States); Facultad de Ingeniera Mecnica y Elctrica, Universidad Autnoma de Nuevo Len, Av. Universidad S/N, San Nicols de los Garza, NL 66450 (Mexico)

2014-09-15T23:59:59.000Z

353

The economic effects of elevated and depressed freeways on adjacent property owners  

E-Print Network [OSTI]

ABSTRACT The Economic EfFects of Elevated and Depressed Freeways on The Adjacent Property Owners. (May 1995) Floyd David Sentry, B. S. , Texas AkM University Chair of Advisory Committee: Dr. Daniel B. Fambro An econonuc assessment of a comnunity... 322, 095 283, 680 283, 680 260, 040 3, 327, 330 $5, 005, 770 Net Effect of Highway on Property Values $4, 275 139, 635 185, 310 262, 145 254, 800 271, 680 257, 840 3, 327, 330 $4, 703, 095 23 The resale of homes at all levels showed...

Scurry, Floyd David

1995-01-01T23:59:59.000Z

354

Synthesis of Scrub-Oak Ecosystem Responses to Elevated CO2  

SciTech Connect (OSTI)

This report summarizes a synthesis project of a long-term global change experiment conducted at the Kennedy Space Center, Florida, investigating how increasing concentrations of atmospheric carbon dioxide (CO2) influences the functioning of a fire-dominated scrub-oak ecosystem. The experiment began in 1996 and ended in 2007. Results presented here summarize the effects of elevated CO2 on plant growth, soil processes, carbon and nutrient cycling, and other responses. Products include archived data from the experiment, as well as six publications in the peer-reviewed literature.

Hungate, Bruce

2014-11-07T23:59:59.000Z

355

Evaluating Swallowing Muscles Essential for Hyolaryngeal Elevation by Using Muscle Functional Magnetic Resonance Imaging  

SciTech Connect (OSTI)

Purpose: Reduced hyolaryngeal elevation, a critical event in swallowing, is associated with radiation therapy. Two muscle groups that suspend the hyoid, larynx, and pharynx have been proposed to elevate the hyolaryngeal complex: the suprahyoid and longitudinal pharyngeal muscles. Thought to assist both groups is the thyrohyoid, a muscle intrinsic to the hyolaryngeal complex. Intensity modulated radiation therapy guidelines designed to preserve structures important to swallowing currently exclude the suprahyoid and thyrohyoid muscles. This study used muscle functional magnetic resonance imaging (mfMRI) in normal healthy adults to determine whether both muscle groups are active in swallowing and to test therapeutic exercises thought to be specific to hyolaryngeal elevation. Methods and Materials: mfMRI data were acquired from 11 healthy subjects before and after normal swallowing and after swallowing exercise regimens (the Mendelsohn maneuver and effortful pitch glide). Whole-muscle transverse relaxation time (T2 signal, measured in milliseconds) profiles of 7 test muscles were used to evaluate the physiologic response of each muscle to each condition. Changes in effect size (using the Cohen d measure) of whole-muscle T2 profiles were used to determine which muscles underlie swallowing and swallowing exercises. Results: Post-swallowing effect size changes (where a d value of >0.20 indicates significant activity during swallowing) for the T2 signal profile of the thyrohyoid was a d value of 0.09; a d value of 0.40 for the mylohyoid, 0.80 for the geniohyoid, 0.04 for the anterior digastric, and 0.25 for the posterior digastric-stylohyoid in the suprahyoid muscle group; and d values of 0.47 for the palatopharyngeus and 0.28 for the stylopharyngeus muscles in the longitudinal pharyngeal muscle group. The Mendelsohn maneuver and effortful pitch glide swallowing exercises showed significant effect size changes for all muscles tested, except for the thyrohyoid. Conclusions: Muscles of both the suprahyoid and the longitudinal pharyngeal muscle groups are active in swallowing, and both swallowing exercises effectively target muscles elevating the hyolaryngeal complex. mfMRI is useful in testing swallowing muscle function.

Pearson, William G., E-mail: bp1@bu.edu [Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts (United States); Hindson, David F. [Department of Radiology, Boston Medical Center, Boston, Massachusetts (United States)] [Department of Radiology, Boston Medical Center, Boston, Massachusetts (United States); Langmore, Susan E. [Department of Otolaryngology, Boston Medical Center, Boston, Massachusetts (United States) [Department of Otolaryngology, Boston Medical Center, Boston, Massachusetts (United States); Speech and Hearing Sciences, Boston University, Boston, Massachusetts (United States); Zumwalt, Ann C. [Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts (United States)] [Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts (United States)

2013-03-01T23:59:59.000Z

356

Vegetation patterns of Pine Canyon, Big Bend National Park, Texas, in relation to elevation and slope aspect  

E-Print Network [OSTI]

and richness, and stem density are also analyzed. Communities encountered on the south-facing slope, from low to high elevation, are: Chihuahuan Desert shrubland, sotol grassland, open oak shrubland, mixed shrubland, and oak-pinyon-juniper woodland. Communities...

Harris, Bryan Joseph

1997-01-01T23:59:59.000Z

357

Reply to comment by K. M. Lau and K. M. Kim on "`Elevated heat pump' hypothesis for the aerosolmonsoon hydroclimate link  

E-Print Network [OSTI]

Reply to comment by K. M. Lau and K. M. Kim on "`Elevated heat pump' hypothesis for the aerosol. Bollasina (2011), Reply to comment by K. M. Lau and K. M. Kim on "`Elevated heat pump' hypothesis.1029/2010JD015246. [1] Lau and Kim's [2011] (hereinafter LK11) defense of the elevated heat pump (EHP

Nigam, Sumant

358

Dispersion model for elevated dense-gas-jet chemical releases (DOMS/DEGADIS) (for microcomputers). Software  

SciTech Connect (OSTI)

The computer program, Ooms/DEGADIS, found on these diskettes and described in the EPA report entitled, A Dispersion Model for Elevated Dense Gas Jet Chemical Releases - Volumes 1 and 2 (EPA 450/4-88-006a and b), is a VAX-operational program designed to simulate the dispersion of heavier-than-air gases which are emitted into the atmosphere with significant velocity through elevated ports. The program incorporates the sequential execution of two models. The first one (Ooms) calculates the trajectory and dispersion of the gas plume as it falls to the ground. The second (DEGADIS) calculates the downwind dispersion of the plume after it touches the ground. Users are referred to the Preface in the User's Guide for specific instructions for program implementation...Software Description: The program is written in FORTRAN with specific intent for compilation and execution on a Digital Equipment Corporation VAX computer. Implementation of the model on any other computer system may be attempted at the risk of the user. To facilitate dissemination of the model, it is being provided on two PC-compatible diskettes. The model should be uploaded via modem from a PC terminal to host VAX computer, and several files must then be renamed prior to compilation and execution.

Guinnup, D.

1988-04-01T23:59:59.000Z

359

Chemical and mechanical stability of sodium sulfate activated slag after exposure to elevated temperature  

SciTech Connect (OSTI)

The chemical and mechanical stability of slag activated with two different concentrations of sodium sulfate (Na{sub 2}SO{sub 4}) after exposure to elevated temperatures ranging from 200 to 800 Degree-Sign C with an increment of 200 Degree-Sign C has been examined. Compressive strengths and pH of the hardened pastes before and after the exposure were determined. The various decomposition phases formed were identified using X-ray diffraction, thermogravimetric analysis and scanning electron microscopy. The results indicated that Na{sub 2}SO{sub 4} activated slag has a better resistance to the degradation caused by exposure to elevated temperature up to 600 Degree-Sign C than Portland cement system as its relative strengths are superior. The finer slag and higher Na{sub 2}SO{sub 4} concentration gave better temperature resistance. Whilst the pH of the hardened pastes decreased with an increase in temperature, it still maintained a sufficiently high pH for the protection of reinforcing bar against corrosion.

Rashad, A.M., E-mail: alaarashad@yahoo.com [Housing and Building National Research Center, HBRC, 87 El-Tahrir St., Dokki, Giza 11511, P.O. Box: 1770, Cairo (Egypt); Bai, Y., E-mail: y.bai@qub.ac.uk [School of Planning, Architecture and Civil Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG (United Kingdom); Basheer, P.A.M. [School of Planning, Architecture and Civil Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG (United Kingdom); Collier, N.C.; Milestone, N.B. [Immobilisation Science Laboratory, Department of Engineering Materials, University of Sheffield, Mappin Street, Sheffield S1 3JD (United Kingdom)

2012-02-15T23:59:59.000Z

360

ELEVATED TEMPERATURE SENSORS FOR ON-LINE CRITICAL EQUIPMENT HEALTH MONITORING  

SciTech Connect (OSTI)

The objective of this research program is to improve high temperature piezoelectric aluminum nitride (AlN) sensor technology to make it useful for instrumentation and health monitoring of current and future electrical power generation equipment. The program will extend the temperature range of the sensor from approximately 700 C to above 1000 C, and ultrasonic coupling to objects at these temperatures will be investigated and tailored for use with the sensor. The chemical vapor deposition (CVD) AlN deposition process was successfully transferred from film production on tungsten carbide substrates to titanium alloy and silicon carbide (SiC) substrates in the first year of the program, and additional substrates were evaluated. In the second year of the program, additional substrate research was performed with the goal of improving the performance of using SiC substrates. While greatly improved bandwidth was achieved, sensor survival at elevated temperature remains problematic. The elevated temperature coupling work continued with significant experimentation. Molten glasses were found to work within a limited temperature range, but metal foils applied with heat and pressure were found to have superior performance overall. The final year of the program will be dedicated to making further advances in AlN/ substrate behavior, and the design and implementation of a sensor demonstration experiment at very high temperature in a simulated industrial application.

James Sebastian

2005-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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

Computational fluid dynamics simulations of oxy-coal combustion for carbon capture at atmospheric and elevated pressures  

E-Print Network [OSTI]

Oxy-fuel combustion of solid fuels, often performed in a mixture of oxygen and wet or dry recycled carbon dioxide, has gained significant interest in the last two decades as one of the leading carbon capture technologies ...

Chen, Lei, Ph. D. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

362

Biochemical studies concerning the relationship of various blood and urine constituents to rate of gain in young beef animals  

E-Print Network [OSTI]

of gain in beef animals~ it seeesg XogLoal thai the Xoeele af aortain nutrient blocaL ocaayoneccte shouM be ~sureiL in tbe Xabesatory in this search for a gsoeth incLm, eLnoe these bloog eaterials sores as tbe buUcLing stones fcn groeth anc...LNaLLeae NLe14eLLeal eeelyreLe eae ayykh4 Le eD data ebLaLee4 La %a abeea 4eLeeaLIaaLeae La aa aeLeeLA ee ~L? aey et 4h~ btee4 eeaeLL|eeaLe eLLb eaLe et NsLa et ebe ~i StcaKes bass been oocduotcd oonoercdng possible correlations between rate of gain in bsof...

Ware, James Harold

2012-06-07T23:59:59.000Z

363

IEEEJOURNAL OF QUANTUMELECTRONICS, VOL. QE-21,NO. 7, JULY 1985 831 High-Gain Free Electron Lasers Using Induction  

E-Print Network [OSTI]

of producing intense cwrents (102-104A) at moderately high energy (1-50 MeV). Experiments using a 500 A, 3.3 Me of Energy under Contracts W- Research Projects Agency under ARPA Order 4856, Program Code 3B10. T. J. Future experi- ments include a high-gain, high-efficiency FEL operating at 10.6 pm using a 50 MeV beam. I

Wurtele, Jonathan

364

Study of gain and photoresponse characteristics for back-illuminated separate absorption and multiplication GaN avalanche photodiodes  

SciTech Connect (OSTI)

The gain and photoresponse characteristics have been numerically studied for back-illuminated separate absorption and multiplication (SAM) GaN avalanche photodiodes (APDs). The parameters of fundamental models are calibrated by simultaneously comparing the simulated dark and light current characteristics with the experimental results. Effects of environmental temperatures and device dimensions on gain characteristics have been investigated, and a method to achieve the optimum thickness of charge layer is obtained. The dependence of gain characteristics and breakdown voltage on the doping concentration of the charge layer is also studied in detail to get the optimal charge layer. The bias-dependent spectral responsivity and quantum efficiency are then presented to study the photoresponse mechanisms inside SAM GaN APDs. It is found the responsivity peak red-shifts at first due to the Franz-Keldysh effect and then blue-shifts due to the reach-through effect of the absorption layer. Finally, a new SAM GaN/AlGaN heterojunction APD structure is proposed for optimizing SAM GaN APDs.

Wang, Xiaodong; Pan, Ming; Hou, Liwei; Xie, Wei [No. 50 Research Institute of China Electronics Technology Group Corporation, 200331 Shanghai (China); Hu, Weida, E-mail: wdhu@mail.sitp.ac.cn; Xu, Jintong; Li, Xiangyang; Chen, Xiaoshuang, E-mail: xschen@mail.sitp.ac.cn; Lu, Wei [National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 200083 Shanghai (China)

2014-01-07T23:59:59.000Z

365

Matlab's Loss is Nobody's Gain Created Aug. 1998, revised July 31, 2004 http://www.cs.berkeley.edu/~wkahan/MxMulEps.pdf Page 1/36  

E-Print Network [OSTI]

Matlab's Loss is Nobody's Gain Created Aug. 1998, revised July 31, 2004 http://www.cs.berkeley.edu/~wkahan/MxMulEps.pdf Page 1/36 Matlab's Loss is Nobody's Gain Prof. W. Kahan Mathematics Dept. & Elect. Eng. & Computer Sci. Dept. University of California Berkeley CA 94720-1776 Abstract: Matlab has become the software package

California at Berkeley, University of

366

The power gain is the ratio of the power delivered to the load to the power delivered to the input of the amplifier [2].  

E-Print Network [OSTI]

1 The power gain is the ratio of the power delivered to the load to the power delivered to the input of the amplifier [2]. 2 The transducer gain is the ratio of the power delivered to the load to the available power of the source [2] and is a function of the source impedance. If the source impedance has

Groppi, Christopher

367

UoE Employees How to gain access to internal vacancies As a current University employee, you will be eligible to access (via the jobs site) vacancies  

E-Print Network [OSTI]

UoE Employees ­ How to gain access to internal vacancies As a current University employee, you will be eligible to access (via the jobs site) vacancies advertised internally, in addition to those advertised gain access to all vacancies (including those advertised to internal applicants only) whenever you log

Edinburgh, University of

368

Elevated Temperature Primary Load Design Method Using Pseudo Elastic-Perfectly Plastic Model  

SciTech Connect (OSTI)

A new primary load design method for elevated temperature service has been developed. Codification of the procedure in an ASME Boiler and Pressure Vessel Code, Section III Code Case is being pursued. The proposed primary load design method is intended to provide the same margins on creep rupture, yielding and creep deformation for a component or structure that are implicit in the allowable stress data. It provides a methodology that does not require stress classification and is also applicable to a full range of temperature above and below the creep regime. Use of elastic-perfectly plastic analysis based on allowable stress with corrections for constraint, steady state stress and creep ductility is described. This approach is intended to ensure that traditional primary stresses are the basis for design, taking into account ductility limits to stress re-distribution and multiaxial rupture criteria.

Carter, Peter [Stress Engineering Services Inc.] [Stress Engineering Services Inc.; Sham, Sam [ORNL] [ORNL; Jetter, Robert I [Consultant] [Consultant

2012-01-01T23:59:59.000Z

369

The degradation of TPX components by oxygen, elevated temperature, and ionizing radiation  

SciTech Connect (OSTI)

Poly(4-methyl-l-pentene), also known as PMP or TPX, has several commercially important characteristics such as high optical transparency, high crystalline melting point, low density, low electrical conductivity, and good heat resistance. Such characteristics have lead to numerous industrial applications including infrared windows, infrared lenses, membranes, and food packaging. The life components fabricated from this material may be limited bv thermal oxidative and radiation-induced degradation. A preliminary review of the scientific literature has been conducted to obtain relevant information on the effects of oxygen, moisture elevated temperature, and radiation on the chemical, thermodynamic, mechanical, and electrical properties of this important construction material. Key information from the literature has become especially important in light of decreased budgets for defense-related research and development, and the prolonged service life of existing systems.

Farmer, J.C.

1996-09-01T23:59:59.000Z

370

Note: Operation of gamma-ray microcalorimeters at elevated count rates using filters with constraints  

SciTech Connect (OSTI)

Microcalorimeter sensors operated near 0.1 K can measure the energy of individual x- and gamma-ray photons with significantly more precision than conventional semiconductor technologies. Both microcalorimeter arrays and higher per pixel count rates are desirable to increase the total throughput of spectrometers based on these devices. The millisecond recovery time of gamma-ray microcalorimeters and the resulting pulse pileup are significant obstacles to high per pixel count rates. Here, we demonstrate operation of a microcalorimeter detector at elevated count rates by use of convolution filters designed to be orthogonal to the exponential tail of a preceding pulse. These filters allow operation at 50% higher count rates than conventional filters while largely preserving sensor energy resolution.

Alpert, B. K.; Horansky, R. D.; Bennett, D. A.; Doriese, W. B.; Fowler, J. W.; Ullom, J. N. [National Institute of Standards and Technology, Boulder, Colorado 80305 (United States); Hoover, A. S.; Rabin, M. W. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2013-05-15T23:59:59.000Z

371

Modeling the response of plants and ecosystems to elevated CO sub 2 and climate change  

SciTech Connect (OSTI)

While the exact effects of elevated CO{sub 2} on global climate are unknown, there is a growing consensus among climate modelers that global temperature and precipitation will increase, but that these changes will be non-uniform over the Earth's surface. In addition to these potential climatic changes, CO{sub 2} also directly affects plants via photosynthesis, respiration, and stomatal closure. Global climate change, in concert with these direct effects of CO{sub 2} on plants, could have a significant impact on both natural and agricultural ecosystems. Society's ability to prepare for, and respond to, such changes depends largely on the ability of climate and ecosystem researchers to provide predictions of regional level ecosystem responses with sufficient confidence and adequate lead time.

Reynolds, J.F.; Hilbert, D.W.; Chen, Jia-lin; Harley, P.C.; Kemp, P.R.; Leadley, P.W.

1992-03-01T23:59:59.000Z

372

Modeling the response of plants and ecosystems to elevated CO{sub 2} and climate change  

SciTech Connect (OSTI)

While the exact effects of elevated CO{sub 2} on global climate are unknown, there is a growing consensus among climate modelers that global temperature and precipitation will increase, but that these changes will be non-uniform over the Earth`s surface. In addition to these potential climatic changes, CO{sub 2} also directly affects plants via photosynthesis, respiration, and stomatal closure. Global climate change, in concert with these direct effects of CO{sub 2} on plants, could have a significant impact on both natural and agricultural ecosystems. Society`s ability to prepare for, and respond to, such changes depends largely on the ability of climate and ecosystem researchers to provide predictions of regional level ecosystem responses with sufficient confidence and adequate lead time.

Reynolds, J.F.; Hilbert, D.W.; Chen, Jia-lin; Harley, P.C.; Kemp, P.R.; Leadley, P.W.

1992-03-01T23:59:59.000Z

373

Origin of elevated water levels encountered in Pahute Mesa emplacement boreholes: Preliminary investigations  

SciTech Connect (OSTI)

The presence of standing water well above the predicted water table in emplacement boreholes on Pahute Mesa has been a recurring phenomenon at the Nevada Test Site (NTS). If these levels represent naturally perched aquifers, they may indicate a radionuclide migration hazard. In any case, they can pose engineering problems in the performance of underground nuclear tests. The origin of these elevated waters is uncertain. Large volumes of water are introduced during emplacement drilling, providing ample source for artificially perched water, yet elevated water levels can remain constant for years, suggesting a natural origin instead. In an effort to address the issue of unexpected standing water in emplacement boreholes, three different sites were investigated in Area 19 on Pahute Mesa by Desert Research Institute (DRI) staff from 1990-93. These sites were U-19az, U-19ba, and U-19bh. As of this writing, U-19bh remains available for access; however, nuclear tests were conducted at the former two locations subsequent to this investigations. The experiments are discussed in chronological order. Taken together, the experiments indicate that standing water in Pahute Mesa emplacement holes originates from the drainage of small-volume naturally perched zones. In the final study, the fluids used during drilling of the bottom 100 m of emplacement borehole U-19bh were labeled with a chemical tracer. After hole completion, water level rose in the borehole, while tracer concentration decreased. In fact, total mass of tracer in the borehole remained constant, while water levels rose. After water levels stabilized in this hole, no change in tracer mass was observed over two years, indicating that no movement of water out of the borehole is taking place (as at U- 19ba). Continued labeling tests of standing water are recommended to confirm the conclusions made here, and to establish their validity throughout Pahute Mesa.

Brikowski, T.; Chapman, J.; Lyles, B.; Hokett, S.

1993-11-01T23:59:59.000Z

374

Temperature elevation by HIFU in ex vivo porcine muscle: MRI measurement and simulation study  

SciTech Connect (OSTI)

Purpose: High-intensity focused ultrasound is a rapidly developing medical technology with a large number of potential clinical applications. Computational model can play a pivotal role in the planning and optimization of the treatment based on the patient's image. Nonlinear propagation effects can significantly affect the temperature elevation and should be taken into account. In order to investigate the importance of nonlinear propagation effects, nonlinear Westervelt equation was solved. Weak nonlinear propagation effects were studied. The purpose of this study was to investigate the correlation between the predicted and measured temperature elevations and lesion in a porcine muscle. Methods: The investigated single-element transducer has a focal length of 12 cm, an aperture of 8 cm, and frequency of 1.08 MHz. Porcine muscle was heated for 30 s by focused ultrasound transducer with an acoustic power in the range of 2456 W. The theoretical model consists of nonlinear Westervelt equation with relaxation effects being taken into account and Pennes bioheat equation. Results: Excellent agreement between the measured and simulated temperature rises was found. For peak temperatures above 8590?C preboiling or cavitation activity appears and lesion distortion starts, causing small discrepancy between the measured and simulated temperature rises. From the measurements and simulations, it was shown that distortion of the lesion was caused by the preboiling activity. Conclusions: The present study demonstrated that for peak temperatures below 8590?C numerical simulation results are in excellent agreement with the experimental data in three dimensions. Both temperature rise and lesion size can be well predicted. Due to nonlinear effect the temperature in the focal region can be increased compared with the linear case. The current magnetic resonance imaging (MRI) resolution is not sufficient. Due to the inevitable averaging the measured temperature can be 1030?C lower than the peak temperature. Computational fluid dynamics can provide additional important information that is lost using a state of the art MRI device.

Solovchuk, Maxim A., E-mail: solovchuk@gmail.com [Center for Advanced Study in Theoretical Sciences (CASTS), National Taiwan University, Taipei 10617, Taiwan (China); Hwang, San Chao; Chang, Hsu [Medical Engineering Research Division, National Health Research Institute, Miaoli 35053, Taiwan (China)] [Medical Engineering Research Division, National Health Research Institute, Miaoli 35053, Taiwan (China); Thiriet, Marc [Sorbonne Universits, UPMC Univ Paris 06, UMR 7598, Laboratoire Jacques-Louis Lions, F-75005, Paris (France)] [Sorbonne Universits, UPMC Univ Paris 06, UMR 7598, Laboratoire Jacques-Louis Lions, F-75005, Paris (France); Sheu, Tony W. H., E-mail: twhsheu@ntu.edu.tw [Department of Engineering Science and Ocean Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, Republic of China and Center for Advanced Study in Theoretical Sciences (CASTS), National Taiwan University, Taipei 10617, Taiwan (China)] [Department of Engineering Science and Ocean Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, Republic of China and Center for Advanced Study in Theoretical Sciences (CASTS), National Taiwan University, Taipei 10617, Taiwan (China)

2014-05-15T23:59:59.000Z

375

Computational and Experimental Design of Fe-Based Superalloys for Elevated-Temperature Applications  

SciTech Connect (OSTI)

Analogous to nickel-based superalloys, Fe-based superalloys, which are strengthened by coherent B2- type precipitates are proposed for elevated-temperature applications. During the period of this project, a series of ferritic superalloys have been designed and fabricated by methods of vacuum-arc melting and vacuum-induction melting. Nano-scale precipitates were characterized by atom-probe tomography, ultrasmall- angle X-ray scattering, and transmission-electron microscopy. A duplex distribution of precipitates was found. It seems that ferritic superalloys are susceptible to brittle fracture. Systematic endeavors have been devoted to understanding and resolving the problem. Factors, such as hot rolling, precipitate volume fractions, alloy compositions, precipitate sizes and inter-particle spacings, and hyperfine cooling precipitates, have been investigated. In order to understand the underlying relationship between the microstructure and creep behavior of ferric alloys at elevated temperatures, in-situ neutron studies have been carried out. Based on the current result, it seems that the major role of β? with a 16%-volume fraction in strengthening ferritic alloys is not load sharing but interactions with dislocations. The oxidation behavior of one ferritic alloy, FBB8 (Fe-6.5Al-10Ni-10Cr-3.4Mo-0.25Zr-0.005B, weight percent), was studied in dry air. It is found that it possesses superior oxidation resistance at 1,023 and 1,123 K, compared with other creep-resistant ferritic steels [T91 (modified 9Cr-1Mo, weight percent) and P92 (9Cr-1.8W-0.5Mo, weight percent)]. At the same time, the calculation of the interfacial energies between the -iron and B2-type intermetallics (CoAl, FeAl, and NiAl) has been conducted.

Peter K. Liaw; Morris E. Fine; Gautam Ghosh; Mark D. Asta; Chain T. Liu; Zhiqian Sun; Shenyan Huang; Zhenke Teng; Gongyao Wang

2012-01-14T23:59:59.000Z

376

Performance of the Gas Gain Monitoring system of the CMS RPC muon detector and effective working point fine tuning  

E-Print Network [OSTI]

The Gas Gain Monitoring (GGM) system of the Resistive Plate Chamber (RPC) muon detector in the Compact Muon Solenoid (CMS) experiment provides fast and accurate determination of the stability in the working point conditions due to gas mixture changes in the closed loop recirculation system. In 2011 the GGM began to operate using a feedback algorithm to control the applied voltage, in order to keep the GGM response insensitive to environmental temperature and atmospheric pressure variations. Recent results are presented on the feedback method used and on alternative algorithms.

S. Colafranceschi; L. Benussi; S. Bianco; L. Passamonti; D. Piccolo; D. Pierluigi; A. Russo; G. Saviano; C. Vendittozzi; M. Abbrescia; A. Aleksandrov; U. Berzano; C. Calabria; C. Carrillo; A. Colaleo; V. Genchev; P. Iaydjiev; M. Kang; K. S. Lee; F. Loddo; S. K. Park; G. Pugliese; M. Maggi; S. Shin; M. Rodozov; M. Shopova; G. Sultanov; P. Verwillingen

2012-09-18T23:59:59.000Z

377

Critical coupling and coherent perfect absorption for ranges of energies due to a complex gain and loss symmetric system  

E-Print Network [OSTI]

We consider a non-Hermitian medium with a gain and loss symmetric, exponentially damped potential distribution to demonstrate different scattering features analytically. The condition for critical coupling (CC) for unidirectional wave and coherent perfect absorption (CPA) for bidirectional waves are obtained analytically for this system. The energy points at which total absorption occurs are shown to be the spectral singular points for the time reversed system. The possible energies at which CC occurs for left and right incidence are different. We further obtain periodic intervals with increasing periodicity of energy for CC and CPA to occur in this system.

Mohammad Hasan; Ananya Ghatak; Bhabani Prasad Mandal

2014-03-03T23:59:59.000Z

378

Absorption, emission, and gain spectra of 1. 3. mu. m InGaAsP quaternary lasers  

SciTech Connect (OSTI)

The spontaneous emission spectrum of mesa lasers was analyzed to determine the absorption and gain spectra at threshold. The radiative current density at threshold was found to be 4.4 kA cm/sup -2/ ..mu..m/sup -1/, which is 60 percent of the total current density for the lowest threshold mesa laser. The increase in radiative lifetime due to reabsorption of emitted radiation was calculated to be 1.5, using the measured absorption and emission spectra. Contrary to other studies, this investigation of an LED and 3 lasers of different types yielded no evidence of carrier heating.

Henry, C.H.; Logan, R.A.; Merritt, F.R.; Temkin, H.

1983-06-01T23:59:59.000Z

379

Modeling of optical amplifier waveguide based on silicon nanostructures and rare earth ions doped silica matrix gain media by a finite-difference time-domain method: comparison of achievable gain with Er3+ or Nd3+ ions dopants  

E-Print Network [OSTI]

A comparative study of the gain achievement is performed in a waveguide optical amplifier whose active layer is constituted by a silica matrix containing silicon nanograins acting as sensitizer of either neodymium ions (Nd 3+) or erbium ions (Er 3+). Due to the large difference between population levels characteristic times (ms) and finite-difference time step (10 --17 s), the conventional auxiliary differential equation and finite-difference time-domain (ADE-FDTD) method is not appropriate to treat such systems. Consequently, a new two loops algorithm based on ADE-FDTD method is presented in order to model this waveguide optical amplifier. We investigate the steady states regime of both rare earth ions and silicon nanograins levels populations as well as the electromagnetic field for different pumping powers ranging from 1 to 10 4 mW.mm-2. Furthermore, the three dimensional distribution of achievable gain per unit length has been estimated in this pumping range. The Nd 3+ doped waveguide shows a higher gross...

Cardin, Julien; Dufour, Christian; Gourbilleau, Fabrice

2015-01-01T23:59:59.000Z

380

Elastic Properties and Internal Friction of Two Magnesium Alloys at Elevated Temperatures  

SciTech Connect (OSTI)

The elastic properties and internal friction of two magnesium alloys were studied from 25 C to 450 C using Resonant Ultrasound Spectroscopy (RUS). The Young's moduli decrease with increasing temperature. At 200 C, a change in the temperature dependence of the elastic constants is observed. The internal friction increases significantly with increasing temperature above 200 C. The observed changes in the temperature dependence of the elastic constants and the internal friction are the result of anelastic relaxation by grain boundary sliding at elevated temperatures. Elastic properties govern the behavior of a materials subjected to stress over a region of strain where the material behaves elastically. The elastic properties, including the Young's modulus (E), shear modulus (G), bulk modulus (B), and Poisson's ratio (?), are of significant interest to many design and engineering applications. The choice of the most appropriate material for a particular application at elevated temperatures therefore requires knowledge of its elastic properties as a function of temperature. In addition, mechanical vibration can cause significant damage in the automotive, aerospace, and architectural industries and thus, the ability of a material to dissipate elastic strain energy in materials, known as damping or internal friction, is also important property. Internal friction can be the result of a wide range of physical mechanisms, and depends on the material, temperature, and frequency of the loading. When utilized effectively in engineering applications, the damping capacity of a material can remove undesirable noise and vibration as heat to the surroundings. The elastic properties of materials can be determined by static or dynamic methods. Resonant Ultrasound Spectroscopy (RUS), used in this study, is a unique and sophisticated non-destructive dynamic technique for determining the complete elastic tensor of a solid by measuring the resonant spectrum of mechanical resonance for a sample of known geometry, dimensions, and mass. In addition, RUS allows determination of internal friction, or damping, at different frequencies and temperatures. Polycrystalline pure magnesium (Mg) exhibits excellent high damping properties. However, the poor mechanical properties limit the applications of pure Mg. Although alloying can improve the mechanical properties of Mg, the damping properties are reduced with additions of alloying elements. Therefore, it becomes necessary to study and develop Mg-alloys with simultaneous high damping capacity and improved mechanical properties. Moreover, studies involving the high temperature dynamic elastic properties of Mg alloys are limited. In this study, the elastic properties and internal friction of two magnesium alloys were studied at elevated temperatures using RUS. The effect of alloy composition and grain size was investigated. The wrought magnesium alloys AZ31 and ZK60 were employed. Table 1 gives the nominal chemical compositions of these two alloys. The ZK60 alloy is a commercial extruded plate with a T5 temper, i.e. solution-treated at 535 C for two hours, quenched in hot water, and aged at 185 C for 24 hours. The AZ31 alloy is a commercial rolled plate with a H24 temper, i.e. strain hardened and partially annealed.

Freels, M.; Liaw, P. K.; Garlea, E.; Morrell, J. S.; Radiovic, M.

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" from the National Library of EnergyBeta (NLEBeta).
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381

EVIDENCE FOR ELEVATED X-RAY EMISSION IN LOCAL LYMAN BREAK GALAXY ANALOGS  

SciTech Connect (OSTI)

Our knowledge of how X-ray emission scales with star formation at the earliest times in the universe relies on studies of very distant Lyman break galaxies (LBGs). In this paper, we study the relationship between the 2-10 keV X-ray luminosity (L{sub X}), assumed to originate from X-ray binaries (XRBs), and star formation rate (SFR) in ultraviolet (UV) selected z < 0.1 Lyman break analogs (LBAs). We present Chandra observations for four new Galaxy Evolution Explorer selected LBAs. Including previously studied LBAs, Haro 11 and VV 114, we find that LBAs demonstrate L{sub X}/SFR ratios that are elevated by {approx}1.5{sigma} compared to local galaxies, similar to the ratios found for stacked LBGs in the early universe (z > 2). Unlike some of the composite LBAs studied previously, we show that these LBAs are unlikely to harbor active galactic nuclei, based on their optical and X-ray spectra and the spatial distribution of the X-rays in three spatially extended cases. Instead, we expect that high-mass X-ray binaries (HMXBs) dominate the X-ray emission in these galaxies, based on their high specific SFRs (sSFRs {identical_to} SFR/M{sub *} {>=} 10{sup -9} yr{sup -1}), which suggest the prevalence of young stellar populations. Since both UV-selected populations (LBGs and LBAs) have lower dust attenuations and metallicities compared to similar samples of more typical local galaxies, we investigate the effects of dust extinction and metallicity on the L{sub X}/SFR for the broader population of galaxies with high sSFRs (>10{sup -10} yr{sup -1}). The estimated dust extinctions (corresponding to column densities of N{sub H} < 10{sup 22} cm{sup -2}) are expected to have insignificant effects on observed L{sub X}/SFR ratio for the majority of galaxy samples. We find that the observed relationship between L{sub X}/SFR and metallicity appears consistent with theoretical expectations from XRB population synthesis models. Therefore, we conclude that lower metallicities, related to more luminous HMXBs such as ultraluminous X-ray sources, drive the elevated L{sub X}/SFR observed in our sample of z < 0.1 LBAs. The relatively metal-poor, active mode of star formation in LBAs and distant z > 2 LBGs may yield higher total HMXB luminosity than found in typical galaxies in the local universe.

Basu-Zych, Antara R.; Lehmer, Bret D.; Hornschemeier, Ann E.; Ptak, Andrew F. [NASA Goddard Space Flight Center, Code 662, Greenbelt, MD 20771 (United States); Goncalves, Thiago S. [Observatorio do Valongo, Universidade Federal do Rio de Janeiro, Ladeira Pedro Antonio 43, Saude, Rio de Janeiro-RJ, CEP 22240-060 (Brazil); Fragos, Tassos [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Heckman, Timothy M. [Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 (United States); Overzier, Roderik A. [Department of Astronomy, University of Texas at Austin, 1 University Station C1400, Austin, TX 78712 (United States); Schiminovich, David, E-mail: antara.r.basu-zych@nasa.gov [Department of Astronomy, Columbia University, 550 West 120th Street, New York, NY 10027 (United States)

2013-09-10T23:59:59.000Z

382

Elevated temperature triggers human respiratory syncytial virus F protein six-helix bundle formation  

SciTech Connect (OSTI)

Human respiratory syncytial virus (RSV) is a major cause of severe lower respiratory tract infection in infants, immunocompromised patients, and the elderly. The RSV fusion (F) protein mediates fusion of the viral envelope with the target cell membrane during virus entry and is a primary target for antiviral drug and vaccine development. The F protein contains two heptad repeat regions, HR1 and HR2. Peptides corresponding to these regions form a six-helix bundle structure that is thought to play a critical role in membrane fusion. However, characterization of six-helix bundle formation in native RSV F protein has been hindered by the fact that a trigger for F protein conformational change has yet to be identified. Here we demonstrate that RSV F protein on the surface of infected cells undergoes a conformational change following exposure to elevated temperature, resulting in the formation of the six-helix bundle structure. We first generated and characterized six-helix bundle-specific antibodies raised against recombinant peptides modeling the RSV F protein six-helix bundle structure. We then used these antibodies as probes to monitor RSV F protein six-helix bundle formation in response to a diverse array of potential triggers of conformational changes. We found that exposure of 'membrane-anchored' RSV F protein to elevated temperature (45-55 deg. C) was sufficient to trigger six-helix bundle formation. Antibody binding to the six-helix bundle conformation was detected by both flow cytometry and cell-surface immunoprecipitation of the RSV F protein. None of the other treatments, including interaction with a number of potential receptors, resulted in significant binding by six-helix bundle-specific antibodies. We conclude that native, untriggered RSV F protein exists in a metastable state that can be converted in vitro to the more stable, fusogenic six-helix bundle conformation by an increase in thermal energy. These findings help to better define the mechanism of RSV F-mediated membrane fusion and have important implications for the identification of therapeutic strategies and vaccines targeting RSV F protein conformational changes.

Yunus, Abdul S.; Jackson, Trent P.; Crisafi, Katherine; Burimski, Irina; Kilgore, Nicole R.; Zoumplis, Dorian; Allaway, Graham P.; Wild, Carl T. [Panacos Pharmaceuticals, Inc., 209 Perry Parkway, Suite 7, Gaithersburg, MD 20877 (United States); Salzwedel, Karl, E-mail: salzwedelkd@niaid.nih.go [Panacos Pharmaceuticals, Inc., 209 Perry Parkway, Suite 7, Gaithersburg, MD 20877 (United States)

2010-01-20T23:59:59.000Z

383

Optical amplifier exhibiting net phase-mismatch selected to at least partially reduce gain-induced phase-matching during operation and method of operation  

DOE Patents [OSTI]

An optical amplifier, such as an optical waveguide amplifier (e.g., an optical fiber amplifier or a planar waveguide) or a non-guiding optical amplifier, that exhibits a net phase-mismatch selected to at least partially reduce gain-induced phase-matching during operation thereof is disclosed. In one aspect of the invention, an optical amplifier structure includes at least one optical amplifier having a length and a gain region. The at least one optical amplifier exhibits a net phase-mismatch that varies along at least part of the length thereof selected to at least partially reduce gain-induced phase-matching during operation thereof.

Feve, Jean-Philippe (Cupertino, CA); Kliner, Dahv A. V. (San Ramon, CA); Farrow; Roger L. (Pleasanton, CA)

2011-02-01T23:59:59.000Z

384

Avalanche buildup time of an InP/InGaAsP/InGaAs APD at high gain  

SciTech Connect (OSTI)

Under a high-gain operating condition, the presence of a multiplication process in the InGaAs(P) regions of an InP/InGaAsP/InGaAs avalanche photodiode having a structure of separated absorption and multiplication regions (SAM-APD) could lead to significant enhancement of the avalanche buildup time. As a result, the bandwidth of the device could be reduced considerably. The dependence of the avalanche multiplication factor and the intrinsic response time on the reverse bias voltage, the heterointerface field, the doping concentrations, and the width of the InP layer are examined in detail for the case in which hole injection is assumed. It is shown, for example, that for a fixed value of doping concentrations, the reduction of the excess noise factor and the enhancement of the gain-bandwidth product of the device can be made at the same time by a proper increase of the width of the InP layer.

Hsieh, H.C.; Sargeant, W. (Iowa State Univ. of Science and Technology, Ames, IA (USA). Dept. of Electrical Engineering)

1989-09-01T23:59:59.000Z

385

Functional Ecological Gene Networks to Reveal the Changes Among Microbial Interactions Under Elevated Carbon Dioxide Conditions  

SciTech Connect (OSTI)

Biodiversity and its responses to environmental changes is a central issue in ecology, and for society. Almost all microbial biodiversity researches focus on species richness and abundance but ignore the interactions among different microbial species/populations. However, determining the interactions and their relationships to environmental changes in microbial communities is a grand challenge, primarily due to the lack of information on the network structure among different microbial species/populations. Here, a novel random matrix theory (RMT)-based conceptual framework for identifying functional ecological gene networks (fEGNs) is developed with the high throughput functional gene array hybridization data from the grassland microbial communities in a long-term FACE (Free Air CO2 Enrichment) experiment. Both fEGNs under elevated CO2 (eCO2) and ambient CO2 (aCO2) possessed general characteristics of many complex systems such as scale-free, small-world, modular and hierarchical. However, the topological structure of the fEGNs is distinctly different between eCO2 and aCO2, suggesting that eCO2 dramatically altered the interactions among different microbial functional groups/populations. In addition, the changes in network structure were significantly correlated with soil carbon and nitrogen dynamics, and plant productivity, indicating the potential importance of network interactions in ecosystem functioning. Elucidating network interactions in microbial communities and their responses to environmental changes are fundamentally important for research in microbial ecology, systems microbiology, and global change.

Deng, Ye; Zhou, Jizhong; Luo, Feng; He, Zhili; Tu, Qichao; Zhi, Xiaoyang

2010-05-17T23:59:59.000Z

386

Thymosin {beta}4 promotes the migration of endothelial cells without intracellular Ca{sup 2+} elevation  

SciTech Connect (OSTI)

Numerous studies have demonstrated the effects of T{beta}4 on cell migration, proliferation, apoptosis and inflammation after exogenous treatment, but the mechanism by which T{beta}4 functions is still unclear. Previously, we demonstrated that incubation of endothelial cells with T{beta}4 induced synthesis and secretion of various proteins, including plasminogen activator inhibitor type 1 and matrix metaloproteinases. We also showed that T{beta}4 interacts with Ku80, which may operate as a novel receptor for T{beta}4 and mediates its intracellular activity. In this paper, we provide evidence that T{beta}4 induces cellular processes without changes in the intracellular Ca{sup 2+} concentration. External treatment of HUVECs with T{beta}4 and its mutants deprived of the N-terminal tetrapeptide AcSDKP (T{beta}4{sub AcSDKPT/4A}) or the actin-binding sequence KLKKTET (T{beta}4{sub KLKKTET/7A}) resulted in enhanced cell migration and formation of tubular structures in Matrigel. Surprisingly, the increased cell motility caused by T{beta}4 was not associated with the intracellular Ca{sup 2+} elevation monitored with Fluo-4 NW or Fura-2 AM. Therefore, it is unlikely that externally added T{beta}4 induces HUVEC migration via the surface membrane receptors known to generate Ca{sup 2+} influx. Our data confirm the concept that externally added T{beta}4 must be internalized to induce intracellular mechanisms supporting endothelial cell migration.

Selmi, Anna [Department of Molecular and Medical Biophysics, Medical University of Lodz, 92-215 Lodz (Poland)] [Department of Molecular and Medical Biophysics, Medical University of Lodz, 92-215 Lodz (Poland); Malinowski, Mariusz [Institute of Medical Biology, Polish Academy of Sciences, Lodz (Poland)] [Institute of Medical Biology, Polish Academy of Sciences, Lodz (Poland); Brutkowski, Wojciech [Nencki Institute of Experimental Biology, Polish Academy of Sciences, 02-093 Warsaw (Poland)] [Nencki Institute of Experimental Biology, Polish Academy of Sciences, 02-093 Warsaw (Poland); Bednarek, Radoslaw [Department of Molecular and Medical Biophysics, Medical University of Lodz, 92-215 Lodz (Poland)] [Department of Molecular and Medical Biophysics, Medical University of Lodz, 92-215 Lodz (Poland); Cierniewski, Czeslaw S., E-mail: czeslaw.cierniewski@umed.lodz.pl [Department of Molecular and Medical Biophysics, Medical University of Lodz, 92-215 Lodz (Poland); Institute of Medical Biology, Polish Academy of Sciences, Lodz (Poland)

2012-08-15T23:59:59.000Z

387

CHARACTERIZATION OF ELEVATED TEMPERATURE PROPERTIES OF HEAT EXCHANGER AND STEAM GENERATOR ALLOYS  

SciTech Connect (OSTI)

The Next Generation Nuclear Plant project is considering Alloy 800H and Alloy 617 for steam generator and intermediate heat exchangers. It is envisioned that a steam generator would operate with reactor outlet temperatures from 750 to 800 C, while an intermediate heat exchanger for primary to secondary helium would operate up to an outlet temperature of 950 C. Although both alloys are of interest due in part to their technical maturity, a number of specific properties require further characterization for design of nuclear components. Strain rate sensitivity of both alloys has been characterized and is found to be significant above 600 C. Both alloys also exhibit dynamic strain aging, characterized by serrated flow, over a wide range of temperatures and strain rates. High temperature tensile testing of Alloy 617 has been conducted over a range of temperatures. Dynamic strain aging is a concern for these materials since it is observed to result in reduced ductility for many solid solution alloys. Creep, fatigue, and creep-fatigue properties of Alloy 617 have been measured as well, with the goal of determining the influence of the temperature, strain rate and atmosphere on the creep fatigue life of Alloy 617. Elevated temperature properties and implications for codification of the alloys will be described.

J.K. Wright; L.J. Carroll; C.J. Cabet; T. Lillo; J.K. Benz; J.A. Simpson; A. Chapman; R.N. Wright

2012-10-01T23:59:59.000Z

388

Electronic Activation At Oxide Hetero-structure At Elevated Temperatures Source Of Markedly Accelerated Oxygen Reduction Kinetics  

E-Print Network [OSTI]

Electronic Activation At Oxide Hetero-structure At Elevated Temperatures ­ Source Of Markedly a Laboratory for Electrochemical Interfaces, Department of Nuclear Science and Engineering, Massachusetts hand, makes this kind of fuel cell very efficient because of faster transport and electrochemical

Yildiz, Bilge

389

Bayesian models for elevated disease risk due to exposure to uranium mine and mill waste on the Navajo Nation  

E-Print Network [OSTI]

ForReview Only Bayesian models for elevated disease risk due to exposure to uranium mine and mill of Pharmacy, Community Environmental Health Program Keywords: abandoned uranium mines, conditionally specified to ex- posure to uranium mine and mill waste on the Navajo Nation Glenn A. Stark University of New

Huerta, Gabriel

390

Nanosecond Time Resolved and Steady State Infrared Studies of Photoinduced Decomposition of TATB at Ambient and Elevated Pressures  

SciTech Connect (OSTI)

The timescale and/or products of photo-induced decomposition of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) were investigated at ambient pressure and compared with products formed at elevated pressure (i.e. 8 GPa). Ultrafast time-resolved infrared and steady state Fourier transform IR (FTIR) spectroscopies were used to probe TATB and its products after photoexcitation with a 5 ns pulse of 532 nm light. At ambient pressure, transient spectra of TATB indicate that the molecule has significantly decomposed within 60 ns; transient spectra also indicate that formation of CO{sub 2}, an observed decomposition product, is complete within 30-40 s. Proof of principle time resolved experiments at elevated pressures were performed and are discussed briefly. Comparison of steady-state FTIR spectra obtained at ambient and elevated pressure (ca. 8 GPa) indicate that the decomposition products vary with pressure. We find evidence for water as a decomposition product only at elevated pressure.

Glascoe, E A; Zaug, J M; Armstrong, M R; Crowhurst, J C; Grant, C D; Fried, L E

2009-03-05T23:59:59.000Z

391

Fracture and Fatigue Behavior at Ambient and Elevated Temperatures of Alumina Bonded with Copper/Niobium/Copper Interlayers  

E-Print Network [OSTI]

Fracture and Fatigue Behavior at Ambient and Elevated Temperatures of Alumina Bonded with Copper and Engineering, University of California, Berkeley, California 94720 Interfacial fracture toughness and cyclic temperatures, and assessed in terms of interfacial chemistry and microstructure. The mean interfacial fracture

Ritchie, Robert

392

Landscape Scale Impacts of Sea Level Rise and Elevation Changes Along the Matagorda Fault in Matagorda, Texas  

E-Print Network [OSTI]

of this study was to quantify land cover change within a Matagorda, Texas wetland that results from sea level rise and elevation change over time due to coastal faulting. The closing objective of this study was to simulate land cover conversion as a function...

Cline, Marie

2012-10-19T23:59:59.000Z

393

Respiratory Oxygen Uptake Is Not Decreased by an Instantaneous Elevation of [CO2], But Is Increased with  

E-Print Network [OSTI]

of a high-resolution dual channel oxygen analyzer within an open gas exchange system to measure respiratoryRespiratory Oxygen Uptake Is Not Decreased by an Instantaneous Elevation of [CO2], But Is Increased an instantaneous reduction of leaf dark respiration measured as CO2 efflux. No known mechanism accounts

DeLucia, Evan H.

394

Numerical and experimental study of soot formation in laminar diffusion flames burning simulated biogas fuels at elevated pressures  

E-Print Network [OSTI]

biogas fuels at elevated pressures Marc R.J. Charest , ?mer L. Gülder, Clinton P.T. Groth University 18 April 2014 Available online 2 June 2014 Keywords: Soot formation High pressure combustion Biogas, and other chemical species that are harmful to human health and the environment. Gaseous biofuels, or biogas

Gülder, ?mer L.

395

Design of Mixed-mode Adaptive Loop Gain Bang-Bang Clock and Data Recovery and Process-Variation-Resilient Current Mode Logic  

E-Print Network [OSTI]

) and Current Mode Logic (CML). This dissertation proposes a mixed-mode adaptive loop gain Bang-Bang CDR. The proposed CDR enhances jitter performances even if jitter spectrum information is limited a priori. By exploiting the inherent hard...

Jeon, Hyung-Joon

2013-03-19T23:59:59.000Z

396

Arizona Department of Revenue Transaction Privilege Tax Exemption Certificate  

E-Print Network [OSTI]

for extracting milk and for cooling milk and livestock. 15. Machinery, equipment or transmission lines used

Wong, Pak Kin

397

Submitting Company Confidential, Proprietary or Privileged Information with  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from the GridwiseSiteDepartmentChallenge | Department ofSubmeter ChallengeIdeas

398

Processing and characterization of transformation-toughened ceramics with strength retention to elevated temperatures: Final report  

SciTech Connect (OSTI)

Al/sub 2/O/sub 3/-ZrO/sub 2/ three layered composites were fabricated in such a way that the outer layers of the bar-shaped specimens consisted of Al/sub 2/O/sub 3/ and unstabilized ZrO/sub 2/, and the inner layer consisted of Al/sub 2/O/sub 3/ and partially-stabilized ZrO/sub 2/. Upon cooling from the sintering temperature, part of the ZrO/sub 2/ in the outer layers transformed from tetragonal (t) to monoclinic (m), while the inside layer ZrO/sub 2/ remained tetragonal. The transformation created compressive stresses in the outer layers and tensile stresses in the bulk. The depth of the outer layers (and therefore the magnitude of the residual stresses) was controlled during green forming. Residual stresses at room temperature varied depending on the outer layer thickness. The increased strengths of the three layer specimens were obtained in the as-fired unground condition, demonstrating that the stresses introduced are the result of transformation-induced stresses during cooling, and did not from transformation produced by grinding. Specimens with residual surface compressive stresses were 200 MPa stronger at 750/degree/C than monolithic specimens, demonstrating the viability of this approach for improving elevated temperature mechanical properties. Strain gauge, x-ray diffraction, and indentation/strength measurements were used to verify the existence of the macroscopic residual stresses. Slip casting and tape casting were investigated as alternative green forming routes to powder pressing. The substitution of HfO/sub 2/ for ZrO/sub 2/ in order to increase the transformation temperature was investigated. 28 refs., 25 figs., 7 tabs.

Cutler, R.A.; Hansen, J.J.; Prouse, D.W.; Bright, J.D.; Virkar, A.V.; Shetty, D.K.

1988-07-01T23:59:59.000Z

399

Ion Mobility Spectrometry Mass Spectrometry Performance Using Electrodynamic Ion Funnels and Elevated Drift Gas Pressures  

SciTech Connect (OSTI)

The ability of ion mobility spectrometry coupled with mass spectrometry (IMS-MS) to characterize biological mixtures has been illustrated over the past eight years. However, the challenges posed by the extreme complexity of many biological samples have demonstrated the need for higher resolution IMS-MS measurements. We have developed a higher resolution ESI-IMS-TOF MS by utilizing high pressure electrodynamic ion funnels at both ends of the IMS drift cell and operating the drift cell at an elevated pressure compared to a previous design. The ESI-IMS-TOF MS instrument consists of an ESI source, an hourglass ion funnel used for ion accumulation/injection into an 88 cm drift cell followed by a 10 cm ion funnel and a commercial orthogonal time-of-flight mass spectrometer providing high mass measurement accuracy. It was found that the rear (exit) ion funnel could be effectively operated as an extension of the drift cell when the DC fields were matched, allowing the instrument to have an effective drift region of 98 cm. Two differentially pumped quadrupole regions were used to couple the IMS and TOF MS to focus and minimize the ion transient time between the stages. The resolution of the instrument was evaluated at pressures ranging from 4 to12 Torr and ion mobility drift voltages of 16 V/cm (4 Torr) to 43 V/cm (12 Torr). An increase in resolution from 55 to 80 was observed from 4 to 12 Torr nitrogen drift gas with no loss in sensitivity. Given the increased usage of ion funnels prior to ion mobility separations, additional attention was directed towards the influence of drift gas on the observed ion populations trapped and transmitted using an electrodynamic ion funnel. The choice of drift gas was shown to influence the degree of ion heating and relative trapping efficiency within the ion funnel.

Baker, Erin Shammel; Clowers, Brian H.; Li, Fumin; Tang, Keqi; Tolmachev, Aleksey V.; Prior, David C.; Belov, Mikhail E.; Smith, Richard D.

2007-06-28T23:59:59.000Z

400

Elevated manganese and cognitive performance in school-aged children and their mothers  

SciTech Connect (OSTI)

Background: Growing evidence suggests that excess manganese (Mn) in children is associated with neurobehavioral impairments. In Brazil, elevated hair Mn concentrations were reported in children living near a ferro-manganese alloy plant. Objectives: We investigated these children's and caregivers' cognitive function in relation to bioindicators of Mn exposure. Methods: In this cross-sectional study, the WISC-III was administered to 83 children aged between 6 and 12 years; the Raven Progressive Matrix was administered to the primary caregivers (94% mothers), who likewise responded to a questionnaire on socio demographics and birth history. Mn in hair (MnH) and blood (MnB) and blood lead (PbB) were measured by graphite furnace atomic absorption spectrometry (GFAAS). Results: Children's mean MnB and MnH were 8.2 {mu}g/L (2.7-23.4) and 5.83 {mu}g/g (0.1-86.68), respectively. Mean maternal MnH was 3.50 {mu}g/g (0.10-77.45) and correlated to children's MnH (rho=0.294, p=0.010). Children's MnH was negatively related to Full-Scale Intelligence Quotient (IQ) and Verbal IQ; {beta} coefficients for MnH were -5.78 (95% CI -10.71 to -0.21) and -6.72 (-11.81 to -0.63), adjusted for maternal education and nutritional status. Maternal MnH was negatively associated with performance on the Raven's ({beta}=-2.69, 95% CI -5.43 to 0.05), adjusted for education years, family income and age. Conclusions: These findings confirm that high MnH in children is associated with poorer cognitive performance, especially in the verbal domain. Primary caregiver's IQ is likewise associated to Mn exposure, suggesting that, in this situation, children's cognition may be affected directly and indirectly by Mn exposure.

Menezes-Filho, Jose A., E-mail: antomen@ufba.br [College of Pharmacy, Federal University of Bahia (Brazil); Public and Environmental Health Program, National School of Public Health, Oswaldo Cruz Foundation (Brazil); Novaes, Cristiane de O.; Moreira, Josino C.; Sarcinelli, Paula N. [Public and Environmental Health Program, National School of Public Health, Oswaldo Cruz Foundation (Brazil)] [Public and Environmental Health Program, National School of Public Health, Oswaldo Cruz Foundation (Brazil); Mergler, Donna [Centre de Recherche Interdisciplinaire sur la Biologie, la Sante, la Societe et l'Environnement (CINBIOSE), Universite du Quebec a Montreal (Canada)] [Centre de Recherche Interdisciplinaire sur la Biologie, la Sante, la Societe et l'Environnement (CINBIOSE), Universite du Quebec a Montreal (Canada)

2011-01-15T23:59:59.000Z

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401

Gain-assisted superluminal microwave pulse propagation via four-wave mixing in superconducting phase quantum circuits  

E-Print Network [OSTI]

We study the propagation and amplification of a microwave field in a four-level cascade quantum system which is realized in a superconducting phase quantum circuit. It is shown that by increasing the microwave pump tones feeding the system, the normal dispersion switches to the anomalous and the gain-assisted superluminal microwave propagation is obtained in this system. Moreover, it is demonstrated that the stimulated microwave field is generated via four-wave mixing without any inversion population in the energy levels of the system (amplification without inversion) and the group velocity of the generated pulse can be controlled by the external oscillating magnetic fluxes. We also show that in some special set of parameters, the absorption-free superluminal generated microwave propagation is obtained in superconducting phase quantum circuit system.

Z. Amini Sabegh; A. Vafafard; M. A. Maleki; M. Mahmoudi

2015-02-23T23:59:59.000Z

402

Gain-assisted superluminal microwave pulse propagation via four-wave mixing in superconducting phase quantum circuits  

E-Print Network [OSTI]

We study the propagation and amplification of a microwave field in a four-level cascade quantum system which is realized in a superconducting phase quantum circuit. It is shown that by increasing the microwave pump tones feeding the system, the normal dispersion switches to the anomalous and the gain-assisted superluminal microwave propagation is obtained in this system. Moreover, it is demonstrated that the stimulated microwave field is generated via four-wave mixing without any inversion population in the energy levels of the system (amplification without inversion) and the group velocity of the generated pulse can be controlled by the external oscillating magnetic fluxes. We also show that in some special set of parameters, the absorption-free superluminal generated microwave propagation is obtained in superconducting phase quantum circuit system.

Sabegh, Z Amini; Maleki, M A; Mahmoudi, M

2015-01-01T23:59:59.000Z

403

The potential environmental gains from recycling waste plastics: Simulation of transferring recycling and recovery technologies to Shenyang, China  

SciTech Connect (OSTI)

Research highlights: {yields} Urban symbiosis creates compatibility of industrial development and waste management. {yields} Mechanical technology leads to more CO{sub 2} emission reduction. {yields} Energy recovery technology leads to more fossil fuel saving. {yields} Clean energy makes recycling technologies cleaner. {yields} Demand management is crucial for realizing potential environmental gains of recycling. - Abstract: With the increasing attention on developing a low-carbon economy, it is necessary to seek appropriate ways on reducing greenhouse gas (GHG) emissions through innovative municipal solid waste management (MSWM), such as urban symbiosis. However, quantitative assessments on the environmental benefits of urban symbiosis, especially in developing countries, are limited because only a limited number of planned synergistic activities have been successful and it is difficult to acquire detailed inventory data from private companies. This paper modifies and applies a two-step simulation system and used it to assess the potential environmental benefits, including the reduction of GHG emissions and saving of fossil fuels, by employing various Japanese plastics recycling/energy-recovery technologies in Shenyang, China. The results showed that among various recycling/energy-recovery technologies, the mechanical waste plastics recycling technology, which produces concrete formwork boards (NF boards), has the greatest potential in terms of reducing GHG emissions (1.66 kg CO{sub 2}e/kg plastics), whereas the technology for the production of refuse plastic fuel (RPF) has the greatest potential on saving fossil fuel consumption (0.77 kgce/kg-plastics). Additional benefits can be gained by applying combined technologies that cascade the utilization of waste plastics. Moreover, the development of clean energy in conjunction with the promotion of new waste plastics recycling programs could contribute to additional reductions in GHG emissions and fossil fuel consumption.

Chen Xudong, E-mail: chen.xudong@nies.go.jp [Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016 (China); National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 (Japan); Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya City 464-8601 (Japan); Xi Fengming [Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016 (China); Geng Yong, E-mail: gengyong@iae.ac.cn [Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016 (China); Fujita, Tsuyoshi [National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 (Japan); Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya City 464-8601 (Japan)

2011-01-15T23:59:59.000Z

404

Risk of Chronic Oral Anticoagulation Therapy in Patients Undergoing Primary Percutaneous Coronary Intervention for ST Elevation Myocardial Infarction - Retrospective Cross-Sectional Study  

E-Print Network [OSTI]

i Risk of Chronic Oral Anticoagulation Therapy in Patients Undergoing Primary Percutaneous Coronary Intervention for ST Elevation Myocardial Infarction Retrospective Cross-Sectional Study BY Copyright 2013 Subba Reddy Vanga... The Thesis Committee for Subba Reddy Vanga certifies that this is the approved version of the following thesis: Risk of Chronic Oral Anticoagulation Therapy in Patients Undergoing Primary Percutaneous Coronary Intervention for ST Elevation...

Vanga, Subba Reddy

2013-12-31T23:59:59.000Z

405

Export markets gain strength  

SciTech Connect (OSTI)

The prices for internally traded coal in the USA have reached record levels and the future market fundamentals look very good. This is mainly due to Asian demand. The article discusses recent markets for US coal and summarizes findings of a recent study by Hill & Associates entitled 'International coal trade - supply, demand and prices to 2025'. 1 ref., 2 tabs.

Fiscor, S.

2008-02-15T23:59:59.000Z

406

Gaining Experience Experiential Learning  

E-Print Network [OSTI]

Impact Analyst Ecologist Environmental Affairs Manager Environmental Educator Environmental Engineer://jobs.environmentamerica.org/page/ amr/internships-make-difference Environmental Career Opportunities http://www.ecojobs.com/environmental- internships.htm Florida Dept. of Environmental Protection http://www.dep.state.fl.us/careers/ careers

Wu, Shin-Tson

407

Gaining Experience Experiential Learning  

E-Print Network [OSTI]

Raiser Grass Roots Coordinator Environmental Lawyer Environmental Impact Analyst Ecologist Environmental http://www.cdc.gov/nceh/ehs/Resources/ internship.htm Florida Environmental Internships http://www.fiu.edu/~envstud/ internships.htm Environmental Career Opportunities http://www.ecojobs.com/environmental- internships

Van Stryland, Eric

408

Gain Sharing.PDF  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject: Guidance for natural gas asWindEECBGSE DOE/IG-480 I N S

409

Gains from Synchronization  

E-Print Network [OSTI]

show that the exporter country bene#12;ts, through decreased noise and uctuations, from devaluating its currency, whereas the importer country does not bene#12;t, in terms of noise and uctuations, from increased valuation of their currency... steady state value. Depending on the value of ( ; #11;), the process has the ability to generate a variety of time paths, including perpetual oscillations. Another \\base model" of an AR(2) process of output is Romer (2001, pages 174-186), which does...

Barnett, William A.; Dalkir, Mehmet

2005-03-30T23:59:59.000Z

410

Plasma etching of HfO{sub 2} at elevated temperatures in chlorine-based chemistry  

SciTech Connect (OSTI)

Plasma etching of HfO{sub 2} at an elevated temperature is investigated in chlorine-based plasmas. Thermodynamic studies are performed in order to determine the most appropriate plasma chemistry. The theoretical calculations show that chlorocarbon gas chemistries (such as CCl{sub 4} or Cl{sub 2}-CO) can result in the chemical etching of HfO{sub 2} in the 425-625 K temperature range by forming volatile effluents such as HfCl{sub 4} and CO{sub 2}. The etching of HfO{sub 2} is first studied on blanket wafers in a high density Cl{sub 2}-CO plasma under low ion energy bombardment conditions (no bias power). Etch rates are presented and discussed with respect to the plasma parameters. The evolution of the etch rate as function of temperature follows an Arrhenius law indicating that the etching comes from chemical reactions. The etch rate of HfO{sub 2} is about 110 A /min at a temperature of 525 K with a selectivity towards SiO{sub 2} of 15. x-ray photoelectron spectroscopy analyses (XPS) reveal that neither carbon nor chlorine is detected on the HfO{sub 2} surface, whereas a chlorine-rich carbon layer is formed on top of the SiO{sub 2} surface leading to the selectivity between HfO{sub 2} and SiO{sub 2}. A drift of the HfO{sub 2} etch process is observed according to the chamber walls conditioning due to chlorine-rich carbon coatings formed on the chamber walls in a Cl{sub 2}-CO plasma. To get a very reproducible HfO{sub 2} etch process, the best conditioning strategy consists in cleaning the chamber walls with an O{sub 2} plasma between each wafer. The etching of HfO{sub 2} is also performed on patterned wafers using a conventional polysilicon gate. The first result show a slight HfO{sub 2} foot at the bottom of the gate and the presence of hafnium oxide-based residues in the active areas.

Helot, M.; Chevolleau, T.; Vallier, L.; Joubert, O.; Blanquet, E.; Pisch, A.; Mangiagalli, P.; Lill, T. [STMicroelectronics, 850 rue Jean Monnet, 38926 Crolles Cedex (France); Laboratoire des Technologies de la Microelectronique, CNRS, 17 rue des martyrs (CEA-LETI), 38054 Grenoble Cedex 09 (France); LTPCM/INPG-CNRS-UJF, 1130 rue de la piscine, 38402 Saint-Martin-d'Heres (France); Applied Materials, 974 E. Arques Ave. M/S 81334, Sunnyvale, California 94086 (United States)

2006-01-15T23:59:59.000Z

411

The effects of digital elevation model resolution on the calculation and predictions of topographic wetness indices.  

SciTech Connect (OSTI)

One of the largest exports in the Southeast U.S. is forest products. Interest in biofuels using forest biomass has increased recently, leading to more research into better forest management BMPs. The USDA Forest Service, along with the Oak Ridge National Laboratory, University of Georgia and Oregon State University are researching the impacts of intensive forest management for biofuels on water quality and quantity at the Savannah River Site in South Carolina. Surface runoff of saturated areas, transporting excess nutrients and contaminants, is a potential water quality issue under investigation. Detailed maps of variable source areas and soil characteristics would therefore be helpful prior to treatment. The availability of remotely sensed and computed digital elevation models (DEMs) and spatial analysis tools make it easy to calculate terrain attributes. These terrain attributes can be used in models to predict saturated areas or other attributes in the landscape. With laser altimetry, an area can be flown to produce very high resolution data, and the resulting data can be resampled into any resolution of DEM desired. Additionally, there exist many maps that are in various resolutions of DEM, such as those acquired from the U.S. Geological Survey. Problems arise when using maps derived from different resolution DEMs. For example, saturated areas can be under or overestimated depending on the resolution used. The purpose of this study was to examine the effects of DEM resolution on the calculation of topographic wetness indices used to predict variable source areas of saturation, and to find the best resolutions to produce prediction maps of soil attributes like nitrogen, carbon, bulk density and soil texture for low-relief, humid-temperate forested hillslopes. Topographic wetness indices were calculated based on the derived terrain attributes, slope and specific catchment area, from five different DEM resolutions. The DEMs were resampled from LiDAR, which is a laser altimetry remote sensing method, obtained from the USDA Forest Service at Savannah River Site. The specific DEM resolutions were chosen because they are common grid cell sizes (10m, 30m, and 50m) used in mapping for management applications and in research. The finer resolutions (2m and 5m) were chosen for the purpose of determining how finer resolutions performed compared with coarser resolutions at predicting wetness and related soil attributes. The wetness indices were compared across DEMs and with each other in terms of quantile and distribution differences, then in terms of how well they each correlated with measured soil attributes. Spatial and non-spatial analyses were performed, and predictions using regression and geostatistics were examined for efficacy relative to each DEM resolution. Trends in the raw data and analysis results were also revealed.

Drover, Damion, Ryan

2011-12-01T23:59:59.000Z

412

Alternations of Structure and Functional Activity of Below Ground Microbial Communities at Elevated Atmospheric Carbon Dioxide  

SciTech Connect (OSTI)

The global atmospheric concentration of CO2 has increased by more than 30percent since the industrial revolution. Although the stimulating effects of elevated CO2 (eCO2) on plant growth and primary productivity have been well studied, its influences on belowground microbial communities are poorly understood and controversial. In this study, we showed a significant change in the structure and functional potential of soil microbial communities at eCO2 in a grassland ecosystem, the BioCON (Biodiversity, CO2 and Nitrogen) experimental site (http://www.biocon.umn.edu/) using a comprehensive functional gene array, GeoChip 3.0, which contains about 28,0000 probes and covers approximately 57,000 gene variants from 292 functional gene families involved in carbon, nitrogen, phosphorus and sulfur cycles as well as other functional processes. GeoChip data indicated that the functional structure of microbial communities was markedly different between ambient CO2 (aCO2) and eCO2 by detrended correspondence analysis (DCA) of all 5001 detected functional gene probes although no significant differences were detected in the overall microbial diversity. A further analysis of 1503 detected functional genes involved in C, N, P, and S cycles showed that a considerable portion (39percent) of them were only detected under either aCO2 (14percent) or eCO2 (25percent), indicating that the functional characteristics of the microbial community were significantly altered by eCO2. Also, for those shared genes (61percent) detected, some significantly (p<0.05) changed their abundance at eCO2. Especially, genes involved in labile C degradation, such as amyA, egl, and ara for starch, cellulose, and hemicelluloses, respectively, C fixation (e.g., rbcL, pcc/acc), N fixation (nifH), and phosphorus utilization (ppx) were significantly increased under eCO2, while those involved in decomposing recalcitrant C, such as glx, lip, and mnp for lignin degradation remained unchanged. This study provides insights into our understanding of belowground microbial communities and their feedbacks to terrestrial ecosystems at eCO2.

He, Zhili; Xu, Meiying; Deng, Ye; Kang, Sanghoon; Wu, Liyou; Van Nostrand, Joy D.; Hobbie, Sarah E.; Reich, Peter B.; Zhou, Jizhong

2010-05-17T23:59:59.000Z

413

Carcass characteristics and fatty acid-binding protein activity in tissues of porcine and bovine species fed elevated monounsaturated fats  

E-Print Network [OSTI]

qualities (Skelley et sl. , 1973; Westerling and Hedrick, 1979). Therefore, the objectives of this study were to incorporate elevated amounts of oleic acid into the diets of harrows and steers to increase the amount of monounsaturated fats in muscle... characteristics of cattle fed either ground corn or ground corn/high oleic rapeseed diets. . 18 Sensory characteristics, cooking loss and mechanical shear force of rib steaks from cattle fed diets containing either ground corn or ground corn/high oleic...

St. John, Lori Ceanne

1986-01-01T23:59:59.000Z

414

Small-signal modulation and differential gain of red-emitting (??=?630?nm) InGaN/GaN quantum dot lasers  

SciTech Connect (OSTI)

We report small-signal modulation bandwidth and differential gain measurements of a ridge waveguide In{sub 0.4}Ga{sub 0.6}N/GaN quantum dot laser grown by molecular beam epitaxy. The laser peak emission is at ??=?630?nm. The ?3?dB bandwidth of an 800??m long device was measured to be 2.4?GHz at 250?mA under pulsed biasing, demonstrating the possibility of high-speed operation of these devices. The differential gain was measured to be 5.3??10{sup ?17}?cm{sup 2}, and a gain compression factor of 2.87??10{sup ?17}?cm{sup 3} is also derived from the small-signal modulation response.

Frost, Thomas; Banerjee, Animesh; Bhattacharya, Pallab, E-mail: pkb@eecs.umich.edu [Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109-2122 (United States)] [Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109-2122 (United States)

2013-11-18T23:59:59.000Z

415

The contact heat conductance at diamond-OFHC copper interface with GaIn eutectic as a heat transfer medium  

SciTech Connect (OSTI)

Results of an experimental study of the contact heat conductance across a single diamond crystal interface with OFHC copper (Cu) are reported. Gallium-indium (GaIn) eutectic was used as an interstitial material. Contact conductance data are important in the design and the prediction of the performance of x-ray diamond monochromators under high-heat-load conditions. Two sets of experiments were carried out. In one, the copper surface in contact with diamond was polished and then electroless plated with 1 {mu}m of nickel, while in the other, the copper contact surface was left as machined. Measured average interface heat conductances are 44.7 {plus_minus}8 W/cm{sup 2}{minus}K for nonplated copper and 23.0 {plus_minus}3 W/cm{sup 2}{minus}K for nickel-plated copper. For reference, the thermal contact conductances at a copper-copper interface (without diamond) were also measured, and the results are reported. A typical diamond monochromator, 0.2 mm thick, will absorb about 44 W under a standard undulator beam at the Advanced Photon Source. The measured conductance for nickel-plated copper suggests that the temperature drop across the interface of diamond and nickel-plated copper, with a 20 mm{sup 2} contact area, will be about 10{degree}C. Therefore temperature rises are rather modest, and the accuracy of the measured contact conductances presented here are sufficient for design purposes.

Assoufid, L.; Khounsary, A.M.

1996-01-01T23:59:59.000Z

416

Contact heat conductance at a diamond-OFHC copper interface with GaIn eutectic as a heat transfer medium  

SciTech Connect (OSTI)

The results of an experimental study of the contact heat conductance across a single diamond crystal interface with OFHC copper (Cu) are reported. Gallium-indium (GaIn) eutectic was used as an interstitial material. Contact conductance data are important in the design and the prediction of the performance of x-ray optics under high-heat-load conditions. Two sets of experiments were carried out. In one, the copper surface in contact with diamond was polished and then electroless plated with 1 {mu}m of nickel, while in the other, the copper contact surface was left as machined. The measured average interface heat conductances are 44.7{plus_minus}8 W/cm{sup 2}-K for nonplated copper and 23.0{plus_minus}8 W/cm{sup 2}-K for nickel-plated copper. For reference, the thermal contact conductances at a copper-copper interface (without diamond) were also measured, and the results are reported. A typical diamond monochromator, 0.2 mm thick, will absorb about 44 W under a standard undulator beam at the Advanced Photon Source. The measured conductance for nickel-plated copper suggests that the temperature drop across the interface of diamond and nickel-plated copper, with a 20 mm {sup 2}contact area, will be about 10{degree}C. Therefore temperature rises are rather modest, and the accuracy of the measured contact conductances presented here are sufficient for design purposes. {copyright} {ital 1996 American Institute of Physics.}

Assoufid, L.; Khounsary, A. [Experimental Facilities Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)] [Experimental Facilities Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

1996-09-01T23:59:59.000Z

417

Critical coupling and coherent perfect absorption for ranges of energies due to a complex gain and loss symmetric system  

SciTech Connect (OSTI)

We consider a non-Hermitian medium with a gain and loss symmetric, exponentially damped potential distribution to demonstrate different scattering features analytically. The condition for critical coupling (CC) for unidirectional wave and coherent perfect absorption (CPA) for bidirectional waves are obtained analytically for this system. The energy points at which total absorption occurs are shown to be the spectral singular points for the time reversed system. The possible energies at which CC occurs for left and right incidence are different. We further obtain periodic intervals with increasing periodicity of energy for CC and CPA to occur in this system. -- Highlights: Energy ranges for CC and CPA are obtained explicitly for complex WS potential. Analytical conditions for CC and CPA for PT symmetric WS potential are obtained. Conditions for left and right CC are shown to be different. Conditions for CC and CPA are shown to be that of SS for the time reversed system. Our model shows the great flexibility of frequencies for CC and CPA.

Hasan, Mohammad, E-mail: mohammadhasan786@gmail.com [ISRO Satellite Centre (ISAC), Bangalore-560017 (India); Ghatak, Ananya, E-mail: gananya04@gmail.com [Department of Physics, Banaras Hindu University, Varanasi-221005 (India); Mandal, Bhabani Prasad, E-mail: bhabani.mandal@gmail.com [Department of Physics, Banaras Hindu University, Varanasi-221005 (India)

2014-05-15T23:59:59.000Z

418

Gain analysis of higher-order-mode amplification in a dielectric-implanted multi-beam traveling wave structure  

SciTech Connect (OSTI)

A multi-beam traveling wave amplifier designed with an overmoded staggered double grating array was examined by small signal analysis combined with simulation. Eigenmode and S-parameter analyses show that the 2 cm long slow wave structure (SWS) has 15 dB insertion loss over the passband (TM{sub 31} mode) with ?28% cold bandwidth. Analytic gain calculation indicates that in the SWS, TM{sub 31}-mode is amplified with 1520 dB/beam at 6484 GHz with three elliptical beams of 10 kV and 150 mA/beam, which was compared with particle-in-cell (PIC) simulations. PIC analysis on the analysis of instability with zero-input driving excitations demonstrated that background noises and non-operating lower order modes are noticeably suppressed by implanting equidistant dielectric absorbers; the overmoded structure only allowed the desired 3rd order mode to propagate in the structure. The designed circuit structure can be widely applied to multi-beam devices for high power RF generation.

Gee, Anthony [Department of Physics, Northern Illinois University, Dekalb, Illinois 60115 (United States)] [Department of Physics, Northern Illinois University, Dekalb, Illinois 60115 (United States); Shin, Young-Min [Department of Physics, Northern Illinois University, Dekalb, Illinois 60115 (United States) [Department of Physics, Northern Illinois University, Dekalb, Illinois 60115 (United States); Accelerator Physics Center (APC), Fermi National Accelerator Laboratory (FNAL), Batavia, Illinois 60510 (United States)

2013-07-15T23:59:59.000Z

419

Electrical, thermal, and species transport properties of liquid eutectic Ga-In and Ga-In-Sn from first principles  

SciTech Connect (OSTI)

Using ab initio molecular dynamics, the atomic structure and transport properties of eutectic Ga-In and Ga-In-Sn are investigated. The Kubo-Greenwood (K-G) and the Ziman-Faber (Z-F) formulations and the Wiedemann-Franz (W-F) law are used for the electrical and electronic thermal conductivity. The species diffusivity and the viscosity are also predicted using the mean square displacement and the Stokes-Einstein (S-E) relation. Alloying Ga causes more disordered structure, i.e., broadening the atomic distance near the In and Sn atoms, which reduces the transport properties and the melting temperature. The K-G treatment shows excellent agreement with the experimental results while Z-F treatment formula slightly overestimates the electrical conductivity. The predicted thermal conductivity also shows good agreement with the experiments. The species diffusivity and the viscosity are slightly reduced by the alloying of Ga with In and Sn atoms. Good agreements are found with available experimental results and new predicted transport-property results are provided.

Yu, Seungho; Kaviany, Massoud, E-mail: kaviany@umich.edu [Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)] [Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2014-02-14T23:59:59.000Z

420

Health and productivity gains from better indoor environments and their implications for the U.S. Department of Energy  

SciTech Connect (OSTI)

A substantial portion of the US population suffers frequently from communicable respiratory illnesses, allergy and asthma symptoms, and sick building syndrome symptoms. We now have increasingly strong evidence that changes in building design, operation, and maintenance can significantly reduce these illnesses. Decreasing the prevalence or severity of these health effects would lead to lower health care costs, reduced sick leave, and shorter periods of illness-impaired work performance, resulting in annual economic benefits for the US in the tens of billions of dollars. Increasing the awareness of these potential health and economic gains, combined with other factors, could help bring about a shift in the way we design, construct, operate, and occupy buildings. The current goal of providing marginally adequate indoor environments could be replaced by the goal of providing indoor environments that maximize the health, satisfaction, and performance of building occupants. Through research and technology transfer, DOE and its contractors are well positioned to help stimulate this shift in practice and, consequently, improve the health and economic well-being of the US population. Additionally, DOE's energy-efficiency interests would be best served by a program that prepares for the potential shift, specifically by identifying and promoting the most energy-efficient methods of improving the indoor environment. The associated research and technology transfer topics of particular relevance to DOE are identified and discussed.

Fisk, William J.

2000-10-01T23:59:59.000Z

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


421

Gain uniformity of InP/InGaAsP/InGaAs avalanche photodiodes with separate absorption, grading, and multiplication regions  

SciTech Connect (OSTI)

We report on the spatial uniformity of the gain M of InP/ InGaAsP/InGaAs avalanche photodiodes with separate absorption, grading, and multiplication regions (SAGM-APD's). Typically, these APD's exhibit less than 10 percent variation in the gain (for M less than or equal to 10) over the entire photosensitive area. The small nonuniformity which is observed shows a one-to-one correspondence with inhomogeneities in the epitaxial layers of the SAGM-APD structure. We also observe a reduction in the effective photosensitive diameter with increasing bias voltage.

Holden, W.S.; Campbell, J.C.; Dental, A.G.

1985-09-01T23:59:59.000Z

422

U-193: NetBSD System Call Return Value Validation Flaw Lets Local...  

Broader source: Energy.gov (indexed) [DOE]

elevated privileges on the target system. PLATFORM: Version(s): 4.0.*, 5.0.*, 5.1, 6.0 Beta ABSTRACT: On Intel CPUs, the sysret instruction can be manipulated into returning to...

423

Apparatus and method for direct measurement of coal ash sintering and fusion properties at elevated temperatures and pressures  

DOE Patents [OSTI]

A high-pressure microdilatometer is provided for measuring the sintering and fusion properties of various coal ashes under the influence of elevated pressures and temperatures in various atmospheres. Electrical resistivity measurements across a sample of coal ash provide a measurement of the onset of the sintering and fusion of the ash particulates while the contraction of the sample during sintering is measured with a linear variable displacement transducer for detecting the initiation of sintering. These measurements of sintering in coal ash at different pressures provide a mechanism by which deleterious problems due to the sintering and fusion of ash in various combustion systems can be minimized or obviated.

Khan, M. Rashid (Morgantown, WV)

1990-01-01T23:59:59.000Z

424

Differential parasitism of seed-feeding Cydia (Lepidoptera: Tortricidae) by native and alien wasp species relative to elevation in subalpine Sophora  

E-Print Network [OSTI]

-1 Differential parasitism of seed-feeding Cydia (Lepidoptera: Tortricidae) by native and alien 2004. Key words: Alien species, Biological control, Elevation gradient, Moth conservation, Non-target, Para- sitism Abstract Alien parasitic wasps, including accidental introductions and purposefully

Silver, Whendee

425

ELEVATED TEMPERATURE CORROSION BEHAVIOR OF IRON-BASE TERNARY ALLOYS THAT DEVELOP Cr2O3 AND/OR Al2O3 BARRIER SCALES  

E-Print Network [OSTI]

7331 c ELEVATED TEMPERATURE CORROSION BEHAVIOR OF IRON-BASEalcohol. to carry out the corrosion experiments. in. i.d. byfor the Analysis of Corrosion Reactions in Coal Gasifi-

Nagarajan, V.

2011-01-01T23:59:59.000Z

426

Bond Strength Degradation for Pre-Stressed Steel and Carbon FRP Bars in High-Performance Self-Consolidating Concrete at Elevated Temperatures and in Fire  

E-Print Network [OSTI]

emphasis on the bond performance of CFRP and steel wire prestressing reinforcement at elevated temperatures. The results of large-scale fire tests and transient high temperature tensile and bond-pullout tests on CFRP and steel prestressing bars embedded...

Maluk, Cristian; Bisby, Luke; Terrasi, Giovanni

2010-06-04T23:59:59.000Z

427

The effects of marsh edge and surface elevation on the distribution of salt marsh infauna and prey availability for nekton predators  

E-Print Network [OSTI]

The relative importance of edge and elevation on infaunal distribution patterns within an intertidal collecting infauna on the nonvegetated intertidal and within the marsh at tina Iterniflora salt marsh was examined by distances of one, three., five...

Whaley, Shannon Diann

1997-01-01T23:59:59.000Z

428

Regional Impact of an Elevated Heat Source: The Zagros Plateau of Iran BENJAMIN F. ZAITCHIK, JASON P. EVANS, AND RONALD B. SMITH  

E-Print Network [OSTI]

Regional Impact of an Elevated Heat Source: The Zagros Plateau of Iran BENJAMIN F. ZAITCHIK, JASON in the north, the Taurus Moun- tains of Turkey, and the Zagros Plateau in Iran. Inter- secting atmospheric

Evans, Jason

429

Fish elevator and method of elevating fish  

DOE Patents [OSTI]

A means and method for transporting fish from a lower body of water to a higher body of water. The means comprises a tubular lock with a gated entrance below the level of the lower body of water through which fish may enter the lock and a discharge passage above the level of the upper body of water. The fish raising means in the lock is a crowder pulled upward by a surface float as water from the upper body of water gravitationally flows into the closed lock filling it to the level of the upper body. Water is then pumped into the lock to raise the level to the discharge passage. The crowder is then caused to float upward the remaining distance through the water to the level of the discharge passage by the introduction of air into a pocket on the underside of the crowder. The fish are then automatically discharged from the lock into the discharge passage by the out of water position of the crowder. The movement of the fish into the discharge passage is aided by the continuous overflow of water still being pumped into the lock. A pipe may be connected to the discharge passage to deliver the fish to a selected location in the upper body of water.

Truebe, Jonathan (Mirror Lake, NH); Drooker, Michael S. (Sanbornville, NH)

1984-01-01T23:59:59.000Z

430

A 220GHz InP HBT Solid-State Power Amplifier MMIC with at 8.2dB Compressed Gain  

E-Print Network [OSTI]

A 220GHz InP HBT Solid-State Power Amplifier MMIC with 90mW POUT at 8.2dB Compressed Gain Thomas B, CA, USA 91360 zgriffith@teledyne-si.com Abstract -- A 220 GHz Solid State Power Amplifer MMIC, Solid State Power Amplifier (SSPA). I. INTRODUCTION Future synthetic aperture radars and high resolution

Rodwell, Mark J. W.

431

54 IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY, VOL. 1, NO. 2, FEBRUARY 2013 Multi-Gain-Stage InGaAs Avalanche Photodiode  

E-Print Network [OSTI]

GaAs Avalanche Photodiode with Enhanced Gain and Reduced Excess Noise George M. Williams, Madison Compton, David, and test of an InGaAs avalanche photodiode (APD) for 950­1650 nm wave- length sensing applications. The APD over 1 000. Index Terms--Avalanche photodiode, optical receiver, photo detector, photon counting. I

Hayat, Majeed M.

432

Daily Gazette, Schenectady NY Letters to the Editor for Thursday, July 10, 2008 Nothing to fear, and much to gain, from waste-to-energy  

E-Print Network [OSTI]

, and much to gain, from waste-to-energy Schenectady is one of those misguided cities that sends its municipal solid wastes to distant landfills, costing much money, wasting valuable energy and increasing global warming and pollution of our environment. Waste-to-energy (WTE) is safe. I advised the Israel

Columbia University

433

SWOT analyses were performed on four different campus bike centers to gain an understanding of the most common features of a  

E-Print Network [OSTI]

; #12; #12;#12; #12; SWOT analyses were performed on four different campus bike centers to gain an understanding of the most common features of a successful bike center. #12;#12;#12;#12; #12; #12 their biking knowledge and skills, but their entire lifestyles #12; Design the space

Brownstone, Rob

434

Demonstration of an 8.85 nm Gain-Saturated Table-Top Soft X-Ray Laser and Lasing down to 7.4 nm  

SciTech Connect (OSTI)

We report the efficient generation of a gain-saturated 8.85 nm wavelength table-top soft x-ray laser operating at 1 Hz repetition rate and the observation of lasing at wavelengths as short as 7.36 nm in lanthanide ions.

Wang, Yong [Colorado State University, Fort Collins; Alessi, David [Colorado State University, Fort Collins; Luther, Brad [Colorado State University, Fort Collins; Yin, Liang [Colorado State University, Fort Collins; Martz, Dale [Colorado State University, Fort Collins; Berrill, Mark A [ORNL; Jorge, Rocca [Colorado State University, Fort Collins

2012-01-01T23:59:59.000Z

435

INteRNatIONal BuSINeSS BuSINeSS adMINIStRatION Students will gain critical insights into business operations  

E-Print Network [OSTI]

MINORS INteRNatIONal BuSINeSS BuSINeSS adMINIStRatION Students will gain critical insights into business operations and strategy from accounting, finance, management and marketing coursework. The Business Administration Minor will provide students with fundamental knowledge and exposure to key business

Maxwell, Bruce D.

436

Laboratory Constraints on the Stability of Petroleum at Elevated Temperatures: Implications for the Origin of Natural Gas  

SciTech Connect (OSTI)

Results of prior DOE supported research conducted at the Woods Hole Oceanographic Institution have demonstrated the participation of sedimentary minerals and water as reactants and catalysts in chemical transformations associated with the degradation of oil and the formation of low molecular weight organic compounds. The occurrence of such processes in natural environments can be difficult to recognize because the composition of organic alteration products may not be substantially different than those produced by thermal cracking. The goals of this study were the development of diagnostic tools based on hydrogen and carbon isotopes that can be used to identify geochemical processes responsible for the formation of thermogenic natural gas. In addition, our activities were expanded to include experimental investigation of CO2 reduction in aqueous systems at elevated temperature and pressures and an assessment of microbial activity in relatively low temperature (<70C) natural gas reservoirs in southeastern Oklahoma. Specific objectives included: ? A laboratory investigation of geochemical processes that regulate the hydrogen isotope composition of low molecular weight hydrocarbons in natural gas at elevated temperatures and pressures. ? A laboratory investigation of factors that regulate the carbon isotope composition of organic acids in basinal brines. ? A laboratory assessment of the role of methanol during reduction of CO2 to CH4 under hydrothermal conditions. ? Characterization of microbial ecosystems in coproduced fluids from the Potato Hills gas field to assess the role of microbes in the generation of natural gas.

Seewald, Jeffrey, S.

2011-03-14T23:59:59.000Z

437

V-220: Juniper Security Threat Response Manager Lets Remote Authentica...  

Broader source: Energy.gov (indexed) [DOE]

commands with the privileges of the target web service. This can be exploited to gain shell access on the target device. IMPACT: Execution of arbitrary code via network, User...

438

JC3 Bulletin Archive | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Update contains 78 new security fixes across all product families. July 19, 2011 T-671: Red Hat system-config-firewall Lets Local Users Gain Root Privileges Red Hat...

439

JC3 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Update contains 78 new security fixes across all product families. July 19, 2011 T-671: Red Hat system-config-firewall Lets Local Users Gain Root Privileges Red Hat...

440

How do elevated [CO2], warming, and reduced precipitation interact to affect soil moisture and LAI in an old field ecosystem?  

SciTech Connect (OSTI)

Soil moisture content and leaf area index (LAI) are properties that will be particularly important in mediating whole system responses to the combined effects of elevated atmospheric [CO2], warming and altered precipitation. Warming and drying will likely reduce soil moisture, and this effect may be exacerbated when these factors are combined. However, elevated [CO2] may increase soil moisture contents and when combined with warming and drying may partially compensate for their effects. The response of LAI to elevated [CO2] and warming will be closely tied to soil moisture status and may mitigate or exacerbate the effects of global change on soil moisture. Using open-top chambers (4-m diameter), the interactive effects of elevated [CO2], warming, and differential irrigation on soil moisture availability were examined in the OCCAM (Old-Field Community Climate and Atmospheric Manipulation) experiment at Oak Ridge National Laboratory in eastern Tennessee. Warming consistently reduced soil moisture contents and this effect was exacerbated by reduced irrigation. However, elevated [CO2] partially compensated for the effects of warming and drying on soil moisture. Changes in LAI were closely linked to soil moisture status. LAI was determined using an AccuPAR ceptometer and both the leaf area duration (LAD) and canopy size were increased by irrigation and elevated [CO2]. The climate of the southeastern United States is predicted to be warmer and drier in the future. This research suggests that although elevated [CO2] will partially ameliorate the effects of warming and drying, losses of soil moisture will increase from old field ecosystems in the future.

Dermody, Orla [University of Tennessee, Knoxville (UTK); Weltzin, Jake [University of Tennessee, Knoxville (UTK); Engel, Elizabeth C. [University of Tennessee, Knoxville (UTK); Allen, Phillip [University of Tennessee, Knoxville (UTK); Norby, Richard J [ORNL

2007-01-01T23:59:59.000Z

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


441

Elevated air temperature alters an old-field insect community in a multi-factor climate change experiment  

SciTech Connect (OSTI)

To address how multiple, interacting climate drivers may affect plant-insect community associations, we sampled the insect community from a constructed old-field plant community grown under simultaneous [CO2], temperature, and water manipulation. Insects were identified to morphospecies, assigned to feeding guilds and abundance, richness and evenness quantified. Warming significantly increased Order Thysanoptera abundance and reduced overall morphospecies richness and evenness. Non-metric multidimensional scaling clearly supported the effect of warming on insect community composition. Reductions in richness for herbivores and parasitoids suggest trophic-level effects within the insect community. Analysis of dominant insects demonstrated the effects of warming were limited to a relatively small number of morphospecies. Reported reductions in whole-community foliar N at elevated [CO2] unexpectedly did not result in any effects on herbivores. These results demonstrate climatic warming may alter certain insect communities via effects on insect species most responsive to higher temperature, contributing to a change in community structure.

Villalpando, Sean [Appalachian State University; Williams, Ray [ORNL; Norby, Richard J [ORNL

2009-01-01T23:59:59.000Z

442

Micro-structural optimization of polybenzimidazole-based membranes for H2/CO2 separation at elevated temperatures  

SciTech Connect (OSTI)

There is compelling need to develop novel separation methods to improve the energy efficiency of synthesis (syn) gas processing operations including H{sub 2} and H{sub 2}/CO production to meet power, chemicals, and fuel producer needs, as well as carbon capture and removal of other undesirable syngas impurities. To be technically and economically viable, a successful separation method must be applicable to industrially relevant gas streams at realistic process conditions and compatible with large gas volumes. H{sub 2} selective membrane technology is a promising method for syngas separations at elevated temperatures (>150 C) that could be positioned upstream or downstream of one or more of the water-gas-shift reactors (WGSRs) or integrated with a WGSR depending on application specific syngas processing. Polybenzimidazole (PBI)-based polymer chemistries are exceptional candidates for H{sub 2}/CO{sub 2} separations at elevated temperatures. In general, these materials possess excellent chemical resistance, very high glass transition temperatures (> 400 C), good mechanical properties, and an appropriate level of processability. Although commercially available PBI polymers have demonstrated commercially attractive H{sub 2}/CO{sub 2} selectivity, their H{sub 2} permeability is low. Our team s employing structural and chemical manipulations to tailor the polymer free-volume achitecture with the ultimate goal of enhancing H{sub 2} permselectivity while retaining the inherent hermochemical stability characteristics of PBI. We will discuss our synthetic approaches and their influences on the gas transport behavior of these PBI-based materials. In general, a decrease in H{sub 2}/CO{sub 2} selectivity was observed with an increase in H{sub 2} permeability. H{sub 2} permeability and H{sub 2}/CO{sub 2} selectivity at 250 C ranged from 50 to 1000 barrer and 5 to 45, respectively.

Singh, Rajinder P [Los Alamos National Laboratory; Li, Xin [University of South Carolina, Columbia, SC; Dudeck, Kevin W [Los Alamos National Laboratory; Benicewicz, Brian C [University of South Carolina, Columbia, SC; Berchtold, Kathryn A [Los Alamos National Laboratory

2012-06-12T23:59:59.000Z

443

Effect of Calcium Supplements on Gains of Lambs Fed Sorghum Fodder or Sorghum Silage as the Roughage Portion of the Fattening Ration.  

E-Print Network [OSTI]

: ................. ................... . 861 1.183 1.801 1.282 Cottonseed meal . 287 . 352 . 289 .309 ..... / 0 1.349 ........................... . 3'7 3 (30 hd.) hd.) (Salt. oz ........................... ( ' . 271 . 451 . 321 . 34 4 (29 Total gain per lamb .......... Average... ................. Cottonseed meal ................... (27 Ground hegari fodder ............... 10.38 -346 . 861 . 287 1.703 . 18 9.24 . 308 6 (29 hd.) hd.) Salt oz ........................... . 27 4 5 . 45 .38 /Pul;erized limestone. oz ............. 1 . 2421...

Jones, J. M. (John McKinley); Stangel, W. L. (Wenzel Louis)

1938-01-01T23:59:59.000Z

444

Adaptive Gain and Order Scheduling of Optimal Fractional Order PI{\\lambda}D{\\mu} Controllers with Radial Basis Function Neural-Network  

E-Print Network [OSTI]

Gain and order scheduling of fractional order (FO) PI{\\lambda}D{\\mu} controllers are studied in this paper considering four different classes of higher order processes. The mapping between the optimum PID/FOPID controller parameters and the reduced order process models are done using Radial Basis Function (RBF) type Artificial Neural Network (ANN). Simulation studies have been done to show the effectiveness of the RBFNN for online scheduling of such controllers with random change in set-point and process parameters.

Das, Saptarshi; Mukherjee, Ayan; Pan, Indranil; Gupta, Amitava; 10.1109/PACC.2011.5979047

2012-01-01T23:59:59.000Z

445

IMPACTS OF INTERACTING ELEVATED ATMOSPHERIC CO2 AND O3 ON THE STRUCTURE AND FUNCTIONING OF A NORTHERN FOREST ECOSYSTEM: OPERATING AND DECOMMISSIONING THE ASPEN FACE PROJECT  

SciTech Connect (OSTI)

Two of the most important and pervasive greenhouse gases driving global change and impacting forests in the U.S. and around the world are atmospheric CO2 and tropospheric O3. As the only free air, large-scale manipulative experiment studying the interaction of elevated CO2 and O3 on forests, the Aspen FACE experiment was uniquely designed to address the long-term ecosystem level impacts of these two greenhouse gases on aspen-birch-maple forests, which dominate the richly forested Lake States region. The project was established in 1997 to address the overarching scientific question: What are the effects of elevated [CO2] and [O3], alone and in combination, on the structure and functioning of northern hardwood forest ecosystems? From 1998 through the middle of the 2009 growing season, we examined the interacting effects of elevated CO2 and O3 on ecosystem processes in an aggrading northern forest ecosystem to compare the responses of early-successional, rapid-growing shade intolerant trembling aspen and paper birch to those of a late successional, slower growing shade tolerant sugar maple. Fumigations with elevated CO2 (560 ppm during daylight hours) and O3 (approximately 1.5 x ambient) were conducted during the growing season from 1998 to 2008, and in 2009 through harvest date. Response variables quantified during the experiment included growth, competitive interactions and stand dynamics, physiological processes, plant nutrient status and uptake, tissue biochemistry, litter quality and decomposition rates, hydrology, soil respiration, microbial community composition and respiration, VOC production, treatment-pest interactions, and treatment-phenology interactions. In 2009, we conducted a detailed harvest of the site. The harvest included detailed sampling of a subset of trees by component (leaves and buds, fine branches, coarse branches and stem, coarse roots, fine roots) and excavation of soil to a depth of 1 m. Throughout the experiment, aspen and birch photosynthesis increased with elevated CO2 and tended to decrease with elevated O3, compared to the control. In contrast to aspen and birch, maple photosynthesis was not enhanced by elevated CO2. Elevated O3 did not cause significant reductions in maximum photosynthesis in birch or maple. In addition, photosynthesis in ozone sensitive clones was affected to a much greater degree than that in ozone tolerant aspen clones. Treatment effects on photosynthesis contributed to CO2 stimulation of aboveground and belowground growth that was species and genotype dependent, with birch and aspen being most responsive and maple being least responsive. The positive effects of elevated CO2 on net primary productivity NPP were sustained through the end of the experiment, but negative effects of elevated O3 on NPP had dissipated during the final three years of treatments. The declining response to O3 over time resulted from the compensatory growth of O3-tolerant genotypes and species as the growth of O3-sensitive individuals declined over time. Cumulative NPP over the entire experiment was 39% greater under elevated CO2 and 10% lower under elevated O3. Enhanced NPP under elevated CO2 was sustained by greater root exploration of soil for growth-limiting N, as well as more rapid rates of litter decomposition and microbial N release during decay. Results from Aspen FACE clearly indicate that plants growing under elevated carbon dioxide, regardless of community type or ozone level, obtained significantly greater amounts of soil N. These results indicate that greater plant growth under elevated carbon dioxide has not led to progressive N limitation. If similar forests growing throughout northeastern North America respond in the same manner, then enhanced forest NPP under elevated CO2 may be sustained for a longer duration than previously thought, and the negative effect of elevated O3 may be diminished by compensatory growth of O3-tolerant plants as they begin to dominate forest communities. By the end of the experiment, elevated CO2 increased ecosystem C content by 11%, whereas

Burton, Andrew J. [Michigan Technological University; Zak, Donald R. [University of Michigan; Kubiske, Mark E. [USDA Forest Service; Pregitzer, Kurt S. [University of Idaho

2014-06-30T23:59:59.000Z

446

Quantifying the Behavioral Response of Spawning Chum Salmon to Elevated Discharges from Bonneville Dam, Columbia River : Annual Report 2005-2006.  

SciTech Connect (OSTI)

In unimpounded rivers, Pacific salmon (Oncorhynchus spp.) typically spawn under relatively stable stream flows, with exceptions occurring during periodic precipitation events. In contrast, hydroelectric development has often resulted in an artificial hydrograph characterized by rapid changes in discharge and tailwater elevation that occur on a daily, or even an hourly basis, due to power generation (Cushman 1985; Moog 1993). Consequently, populations of Pacific salmon that are known to spawn in main-stem habitats below hydroelectric dams face the risks of changing habitat suitability, potential redd dewatering, and uncertain spawning success (Hamilton and Buell 1976; Chapman et al. 1986; Dauble et al. 1999; Garland et al. 2003; Connor and Pflug 2004; McMichael et al. 2005). Although the direct effects of a variable hydrograph, such as redd dewatering are apparent, specific effects on spawning behavior remain largely unexplored. Chum salmon (O. keta) that spawn below Bonneville Dam on the Columbia River are particularly vulnerable to the effects of water level fluctuations. Although chum salmon generally spawn in smaller tributaries (Johnson et al. 1997), many fish spawn in main-stem habitats below Bonneville Dam near Ives Island (Tomaro et al. 2007; Figure 1). The primary spawning area near Ives Island is shallow and sensitive to changes in water level caused by hydroelectric power generation at Bonneville Dam. In the past, fluctuating water levels have dewatered redds and changed the amount of available spawning habitat (Garland et al. 2003). To minimize these effects, fishery managers attempt to maintain a stable tailwater elevation at Bonneville Dam of 3.5 m (above mean sea level) during spawning, which ensures adequate water is provided to the primary chum salmon spawning area below the mouth of Hamilton Creek (Figure 1). Given the uncertainty of winter precipitation and water supply, this strategy has been effective at restricting spawning to a specific riverbed elevation and providing minimum spawning flows that have the greatest chance of being maintained through egg incubation and fry emergence. However, managing the lower Columbia River for a stable tailwater elevation does not provide much operational flexibility at Bonneville Dam, which has little storage capacity. When river discharges increase due to rain events, the traditional approach has been to pass excess water at night to maintain stable tailwater elevations during the daytime. The underlying assumption of this strategy, referred to as reverse load following, is that fish do not spawn at night. However, Tiffan et al. (2005) showed that this assumption is false by documenting nighttime spawning by chum salmon in the Ives Island area. Similarly, McMichael et al. (2005) reported nighttime spawning by Chinook salmon (O. tshawytscha) in the Columbia River, indicating that diel spawning may be a common occurrence in Pacific salmon. During the latter portion of the chum spawning period in December 2003 and 2004, discharges from Bonneville Dam increased from an average of 3,398 m3/s (tailwater elevation {approx} 3.5 m above mean sea level) during the day to over 5,664 m3/s (tailwater elevation {approx} 5.1 m) at night, with peak discharges of 7,080 m{sup 3}/s (tailwater elevation {approx} 6.1 m). This caused concern among fishery managers regarding the potential effects of these high discharges on this population of spawning chum salmon, which is listed under the Endangered Species Act (National Oceanic and Atmospheric Administration 1999). We hypothesized that increased water velocities associated with elevated tailwaters might alter chum salmon spawning behavior if water velocities at redd locations increased beyond the range of suitability (>0.8 m/s; Salo 1991). In 2005, we investigated the movement and behavioral responses of spawning chum salmon at Ives Island to increased tailwater elevations at Bonneville Dam. We used acoustic telemetry to determine if the higher velocities associated with increased tailwater elevations caused fish to leave their re

Tiffan, Kenneth F.; Haskell, Craig A.; Kock, Tobias J.

2008-12-01T23:59:59.000Z

447

Surface dust wipes are the best predictors of blood leads in young children with elevated blood lead levels  

SciTech Connect (OSTI)

Background: As part of the only national survey of lead in Australian children, which was undertaken in 1996, lead isotopic and lead concentration measurements were obtained from children from 24 dwellings whose blood lead levels were ?15 g/dL in an attempt to determine the source(s) of their elevated blood lead. Comparisons were made with data for six children with lower blood lead levels (<10 g/dL). Methods: Thermal ionisation and isotope dilution mass spectrometry were used to determine high precision lead isotopic ratios ({sup 208}Pb/{sup 206}Pb, {sup 207}Pb/{sup 206}Pb and {sup 206}Pb/{sup 204}Pb) and lead concentrations in blood, dust from floor wipes, soil, drinking water and paint (where available). Evaluation of associations between blood and the environmental samples was based on the analysis of individual cases, and Pearson correlations and multiple regression analyses based on the whole dataset. Results and discussion: The correlations showed an association for isotopic ratios in blood and wipes (r=0.52, 95% CI 0.190.74), blood and soil (r=0.33, 95% CI ?0.050.62), and blood and paint (r=0.56, 95% CI 0.090.83). The regression analyses indicated that the only statistically significant relationship for blood isotopic ratios was with dust wipes (B=0.65, 95% CI 0.350.95); there were no significant associations for lead concentrations in blood and environmental samples. There is a strong isotopic correlation of soils and house dust (r=0.53, 95% CI 0.200.75) indicative of a common source(s) for lead in soil and house dust. In contrast, as with the regression analyses, no such association is present for bulk lead concentrations (r=?0.003, 95% CI ?0.370.36), the most common approach employed in source investigations. In evaluation of the isotopic results on a case by case basis, the strongest associations were for dust wipes and blood. -- Highlights: Children with elevated blood lead ?15 g/dL compared with a group with <10 g/dL. High precision lead isotopic ratios in blood, house dust wipes, soil, water, paint. Associations for isotopic measures of blood and dust, blood and soil, blood and paint. Regressions gave significance for isotopic measures of blood/dust and dust/soil.

Gulson, Brian, E-mail: brian.gulson@mq.edu.au [Graduate School of the Environment, Macquarie University, North Ryde NSW 2109 (Australia) [Graduate School of the Environment, Macquarie University, North Ryde NSW 2109 (Australia); CSIRO Earth Science and Resource Engineering, North Ryde NSW 2113 (Australia); Anderson, Phil [Information and Statistics Group, Australian Institute of Health and Welfare, Canberra ACT 2601 (Australia) [Information and Statistics Group, Australian Institute of Health and Welfare, Canberra ACT 2601 (Australia); Faculty of Health, University of Canberra, Canberra ACT 2601 (Australia); Taylor, Alan [Department of Psychology, Macquarie University, Sydney NSW 2109 (Australia)] [Department of Psychology, Macquarie University, Sydney NSW 2109 (Australia)

2013-10-15T23:59:59.000Z

448

Elevated levels of plasma Big endothelin-1 and its relation to hypertension and skin lesions in individuals exposed to arsenic  

SciTech Connect (OSTI)

Chronic arsenic (As) exposure affects the endothelial system causing several diseases. Big endothelin-1 (Big ET-1), the biological precursor of endothelin-1 (ET-1) is a more accurate indicator of the degree of activation of the endothelial system. Effect of As exposure on the plasma Big ET-1 levels and its physiological implications have not yet been documented. We evaluated plasma Big ET-1 levels and their relation to hypertension and skin lesions in As exposed individuals in Bangladesh. A total of 304 study subjects from the As-endemic and non-endemic areas in Bangladesh were recruited for this study. As concentrations in water, hair and nails were measured by Inductively Coupled Plasma Mass Spectroscopy (ICP-MS). The plasma Big ET-1 levels were measured using a one-step sandwich enzyme immunoassay kit. Significant increase in Big ET-1 levels were observed with the increasing concentrations of As in drinking water, hair and nails. Further, before and after adjusting with different covariates, plasma Big ET-1 levels were found to be significantly associated with the water, hair and nail As concentrations of the study subjects. Big ET-1 levels were also higher in the higher exposure groups compared to the lowest (reference) group. Interestingly, we observed that Big ET-1 levels were significantly higher in the hypertensive and skin lesion groups compared to the normotensive and without skin lesion counterpart, respectively of the study subjects in As-endemic areas. Thus, this study demonstrated a novel doseresponse relationship between As exposure and plasma Big ET-1 levels indicating the possible involvement of plasma Big ET-1 levels in As-induced hypertension and skin lesions. -- Highlights: ? Plasma Big ET-1 is an indicator of endothelial damage. ? Plasma Big ET-1 level increases dose-dependently in arsenic exposed individuals. ? Study subjects in arsenic-endemic areas with hypertension have elevated Big ET-1 levels. ? Study subjects with arsenic-induced skin lesions show elevated plasma Big ET-1 levels. ? Arsenic-induced hypertension and skin lesions may be linked to plasma Big ET-1 levels.

Hossain, Ekhtear; Islam, Khairul; Yeasmin, Fouzia [Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi-6205 (Bangladesh)] [Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi-6205 (Bangladesh); Karim, Md. Rezaul [Department of Applied Nutrition and Food Technology, Islamic University, Kushtia-7003 (Bangladesh)] [Department of Applied Nutrition and Food Technology, Islamic University, Kushtia-7003 (Bangladesh); Rahman, Mashiur; Agarwal, Smita; Hossain, Shakhawoat; Aziz, Abdul; Al Mamun, Abdullah; Sheikh, Afzal; Haque, Abedul; Hossain, M. Tofazzal [Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi-6205 (Bangladesh)] [Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi-6205 (Bangladesh); Hossain, Mostaque [Department of Medicine, Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders (BIRDEM), Dhaka (Bangladesh)] [Department of Medicine, Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders (BIRDEM), Dhaka (Bangladesh); Haris, Parvez I. [Faculty of Health and Life Sciences, De Montfort University, Leicester, LE1 9BH (United Kingdom)] [Faculty of Health and Life Sciences, De Montfort University, Leicester, LE1 9BH (United Kingdom); Ikemura, Noriaki; Inoue, Kiyoshi; Miyataka, Hideki; Himeno, Seiichiro [Laboratory of Molecular Nutrition and Toxicology, Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 7708514 (Japan)] [Laboratory of Molecular Nutrition and Toxicology, Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 7708514 (Japan); Hossain, Khaled, E-mail: khossain69@yahoo.com [Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi-6205 (Bangladesh)] [Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi-6205 (Bangladesh)

2012-03-01T23:59:59.000Z

449

Elevated temperature crack propagation  

SciTech Connect (OSTI)

This paper is a summary of two NASA contracts on high temperature fatigue crack propagation in metals. The first evaluated the ability of fairly simple nonlinear fracture parameters to correlate crack propagation. Hastelloy-X specimens were tested under isothermal and thermomechanical cycling at temperatures up to 980 degrees C (1800 degrees F). The most successful correlating parameter was the crack tip opening displacement derived from the J-integral. The second evaluated the ability of several path-independent integrals to correlate crack propagation behavior. Inconel 718 specimens were tested under isothermal, thermomechanical, temperature gradient, and creep conditions at temperatures up to 650 degrees C (1200 degrees F). The integrals formulated by Blackburn and by Kishimoto correlated the data reasonably well under all test conditions.

Orange, T.W.

1994-02-01T23:59:59.000Z

450

GCLakeElevations.PDF  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun with Big Sky Learning Fun with Big SkyDIII-D Performance Tools & EMAction

451

Ground water elevation monitoring at the Uranium Mill Tailings Remedial Action Salt Lake City, Utah, Vitro processing site  

SciTech Connect (OSTI)

In February 1994, a ground water level monitoring program was begun at the Vitro processing site. The purpose of the program was to evaluate how irrigating the new golf driving range affected ground water elevations in the unconfined aquifer. The program also evaluated potential impacts of a 9-hole golf course planned as an expansion of the driving range. The planned golf course expansion would increase the area to be irrigated and, thus, the water that could infiltrate the processing site soil to recharge the unconfined aquifer. Increased water levels in the aquifer could alter the ground water flow regime; contaminants in ground water could migrate off the site or could discharge to bodies of surface water in the area. The potential effects of expanding the golf course have been evaluated, and a report is being prepared. Water level data obtained during this monitoring program indicate that minor seasonal mounding may be occurring in response to irrigation of the driving range. However, the effects of irrigation appear small in comparison to the effects of precipitation. There are no monitor wells in the area that irrigation would affect most; that data limitation makes interpretations of water levels and the possibility of ground water mounding uncertain. Limitations of available data are discussed in the conclusion.

NONE

1995-04-01T23:59:59.000Z

452

Long-term performance of ceramic matrix composites at elevated temperatures: Modelling of creep and creep rupture  

SciTech Connect (OSTI)

The models developed, contain explicit dependences on constituent material properties and their changes with time, so that composite performance can be predicted. Three critical processes in ceramic composites at elevated temperatures have been modeled: (1) creep deformation of composite vs stress and time-dependent creep of fibers and matrix, and failure of these components; (2) creep deformation of ``interface`` around broken fibers; and (3) lifetime of the composite under conditions of fiber strength loss over time at temperature. In (1), general evolution formulas are derived for relaxation time of matrix stresses and steady-state creep rate of composite; the model is tested against recent data on Ti-MMCs. Calculations on a composite of Hi-Nicalon fibers in a melt-infiltrated SiC matrix are presented. In (2), numerical simulations of composite failure were made to map out time-to-failure vs applied load for several sets of material parameters. In (3), simple approximate relations are obtained between fiber life and composite life that should be useful for fiber developers and testers. Strength degradation data on Hi-Nicalon fibers is used to assess composite lifetime vs fiber lifetime for Hi-Nicalon fiber composites.

Curtin, W.A.; Fabeny, B.; Ibnabdeljalil, M.; Iyengar, N.; Reifsnider, K.L. [Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States). Dept. of Engineering Science and Mechanics

1996-07-31T23:59:59.000Z

453

The autoignition of iso-cetane at high to moderate temperatures and elevated pressures: Shock tube experiments and kinetic modeling  

SciTech Connect (OSTI)

Iso-cetane (2,2,4,4,6,8,8-heptamethylnonane, C{sub 16}H{sub 34}) is a highly branched alkane reference compound for determining cetane ratings. It is also a candidate branched alkane representative in surrogate mixtures for diesel and jet fuels. Here new experiments and kinetic modeling results are presented for the autoignition of iso-cetane at elevated temperatures and pressures relevant to combustion in internal combustion engines. Ignition delay time measurements were made in reflected shock experiments in a heated shock tube for {phi} = 0.5, 1.0, and 1.5 iso-cetane/air mixtures at temperatures ranging from 879 to 1347 K and pressures from 8 to 47 atm. Ignition delay times were measured using electronically excited OH emission, monitored through the shock tube end wall, and piezoelectric pressure transducer measurements, made at side wall locations. A new kinetic mechanism for the description of the oxidation of iso-cetane is presented that is developed based on a previous mechanism for iso-octane. Computed results from the mechanism are found in good agreement with the experimental measurements. To our knowledge, the ignition time measurements for iso-cetane presented here are the first of their kind. (author)

Oehlschlaeger, Matthew A.; Steinberg, Justin [Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, 110 8th St., JEC 2049, Troy, NY 12180 (United States); Westbrook, Charles K.; Pitz, William J. [Lawrence Livermore National Laboratory, Livermore, CA (United States)

2009-11-15T23:59:59.000Z

454

Dirac point and transconductance of top-gated graphene field-effect transistors operating at elevated temperature  

SciTech Connect (OSTI)

Top-gated graphene field-effect transistors (GFETs) have been fabricated using bilayer epitaxial graphene grown on the Si-face of 4H-SiC substrates by thermal decomposition of silicon carbide in high vacuum. Graphene films were characterized by Raman spectroscopy, Atomic Force Microscopy, Scanning Tunnelling Microscopy, and Hall measurements to estimate graphene thickness, morphology, and charge transport properties. A 27?nm thick Al{sub 2}O{sub 3} gate dielectric was grown by atomic layer deposition with an e-beam evaporated Al seed layer. Electrical characterization of the GFETs has been performed at operating temperatures up to 100?C limited by deterioration of the gate dielectric performance at higher temperatures. Devices displayed stable operation with the gate oxide dielectric strength exceeding 4.5 MV/cm at 100?C. Significant shifting of the charge neutrality point and an increase of the peak transconductance were observed in the GFETs as the operating temperature was elevated from room temperature to 100?C.

Hopf, T.; Vassilevski, K. V., E-mail: k.vasilevskiy@ncl.ac.uk; Escobedo-Cousin, E.; King, P. J.; Wright, N. G.; O'Neill, A. G.; Horsfall, A. B.; Goss, J. P. [School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU (United Kingdom); Wells, G. H.; Hunt, M. R. C. [Department of Physics, Durham University, Durham DH1 3LE (United Kingdom)

2014-10-21T23:59:59.000Z

455

Maintenance requirements and efficiency of energy use for gain in dry, non-pregnant mature cows of five breeds and their crosses  

E-Print Network [OSTI]

addressed by Garrett (1971) who reported Hereford steers to have a 5() lower daily feed requirement for maintenance and a 20)) higher efficiency in converting f ed energy into protein and fat than '. )olst. in steers. Howev r, beef and dairy animals had... for Gain in Dry, Non-Pregnant Nature Cows of Five Breeds and Their Crosses (August 1984) Juan Carlos Solis, B. S. , Iowa State University Chairman of Advisory Committee: Dr. F. M. Byers Dry, non ? pregnant, mature cows ()10 y) of 5 breed types (Angus...

Solis, Juan Carlos

1984-01-01T23:59:59.000Z

456

Thirty-meter digital elevation models (DEMs) produced by the U.S. Geological Survey (USGS) are widely available and com-  

E-Print Network [OSTI]

Abstract Thirty-meter digital elevation models (DEMs) produced by the U.S. Geological Survey (USGS, and slope classes gen- erated from sample 10-meter drainage-enforced (DE) DEMs and 30-meter DEMs. We found increasing resolution from 30 meters to 10 me- ters, particularly in flatter terrain; (2) streams and HU

457

Interactive effects of elevated temperature and pCO2 on early-life-history stages of the giant kelp Macrocystis pyrifera  

E-Print Network [OSTI]

Interactive effects of elevated temperature and pCO2 on early-life-history stages of the giant kelp and mortality of zoospores of the giant kelp Macrocystis pyrifera, a foundation species of temperate reef ecosystems. Newly settled kelp spores were cultured in the laboratory for seven days in a factorial design

Blanchette, Carol Anne

458

Soybean leaf hydraulic conductance does not acclimate to growth at elevated [CO2] or temperature in growth chambers or in the field  

E-Print Network [OSTI]

Soybean leaf hydraulic conductance does not acclimate to growth at elevated [CO2] or temperature Leaf hydraulic properties are strongly linked with transpiration and photosynthesis in many species. However, it is not known if gas exchange and hydraulics will have co-ordinated responsesto climate change

Sack, Lawren

459

Soil moisture surpasses elevated CO2 and temperature as a control on soil carbon dynamics in a multi-factor climate change experiment  

SciTech Connect (OSTI)

Some single-factor experiments suggest that elevated CO2 concentrations can increase soil carbon, but few experiments have examined the effects of interacting environmental factors on soil carbon dynamics. We undertook studies of soil carbon and nitrogen in a multi-factor (CO2 x temperature x soil moisture) climate change experiment on a constructed old-field ecosystem. After four growing seasons, elevated CO2 had no measurable effect on carbon and nitrogen concentrations in whole soil, particulate organic matter (POM), and mineral-associated organic matter (MOM). Analysis of stable carbon isotopes, under elevated CO2, indicated between 14 and 19% new soil carbon under two different watering treatments with as much as 48% new carbon in POM. Despite significant belowground inputs of new organic matter, soil carbon concentrations and stocks in POM declined over four years under soil moisture conditions that corresponded to prevailing precipitation inputs (1,300 mm yr-1). Changes over time in soil carbon and nitrogen under a drought treatment (approximately 20% lower soil water content) were not statistically significant. Reduced soil moisture lowered soil CO2 efflux and slowed soil carbon cycling in the POM pool. In this experiment, soil moisture (produced by different watering treatments) was more important than elevated CO2 and temperature as a control on soil carbon dynamics.

Garten Jr, Charles T [ORNL; Classen, Aimee T [ORNL; Norby, Richard J [ORNL

2009-01-01T23:59:59.000Z

460

MODELING THE IMPACT OF ELEVATED MERCURY IN DEFENSE WASTE PROCESSING FACILITY MELTER FEED ON THE MELTER OFF-GAS SYSTEM - PRELIMINARY REPORT  

SciTech Connect (OSTI)

The Defense Waste Processing Facility (DWPF) is currently evaluating an alternative Chemical Process Cell (CPC) flowsheet to increase throughput. It includes removal of the steam-stripping step, which would significantly reduce the CPC processing time and lessen the sampling needs. However, its downside would be to send 100% of the mercury that come in with the sludge straight to the melter. For example, the new mercury content in the Sludge Batch 5 (SB5) melter feed is projected to be 25 times higher than that in the SB4 with nominal steam stripping of mercury. This task was initiated to study the impact of the worst-case scenario of zero-mercury-removal in the CPC on the DWPF melter off-gas system. It is stressed that this study is intended to be scoping in nature, so the results presented in this report are preliminary. In order to study the impact of elevated mercury levels in the feed, it is necessary to be able to predict how mercury would speciate in the melter exhaust under varying melter operating conditions. A homogeneous gas-phase oxidation model of mercury by chloride was developed to do just that. The model contains two critical parameters pertaining to the partitioning of chloride among HCl, Cl, Cl{sub 2}, and chloride salts in the melter vapor space. The values for these parameters were determined at two different melter vapor space temperatures by matching the calculated molar ratio of HgCl (or Hg{sub 2}Cl{sub 2}) to HgCl{sub 2} with those measured during the Experimental-Scale Ceramic Melter (ESCM) tests run at the Pacific Northwest National Laboratory (PNNL). The calibrated model was then applied to the SB5 simulant used in the earlier flowsheet study with an assumed mercury stripping efficiency of zero; the molar ratio of Cl-to-Hg in the resulting melter feed was only 0.4, compared to 12 for the ESCM feeds. The results of the model run at the indicated melter vapor space temperature of 650 C (TI4085D) showed that due to excessive shortage of chloride, only 6% of the mercury fed is expected to get oxidized, mostly as HgCl, while the remaining mercury would exist either as elemental mercury vapor (90%) or HgO (4%). Noting that the measured chloride level in the SB5 qualification sample was an order of magnitude lower than that used in the SB5 simulant, the degree of chloride shortage will be even greater. As a result, the projected level of HgCl in the actual SB5 melter exhaust will be even lower than 6% of the total mercury fed, while that of elemental mercury is likely to be greater than 90%. The homogeneous oxidation of mercury in the off-gas was deemed to be of primary importance based on the postulation that mercury and other volatile salts form submicron sized aerosols upon condensation and thus remain largely in the gas stream downstream of the quencher where they can deposit in the off-gas lines, Steam-Atomized Scrubbers (SAS), and High-Efficiency Mist Eliminator (HEME). Formation of these submicron semi-volatile salts in the condensate liquid is considered to be unlikely, so the liquid phase reactions were considered to be less important. However, subsequent oxidation of mercury in the liquid phase in the off-gas system was examined in a simplified model of the off-gas condensate. It was found that the condensate chemistry was consistent with further oxidation of elemental mercury to Hg{sub 2}Cl{sub 2} and conversion of HgO to chlorides. The results were consistent with the available experimental data. It should also be noted that the model predictions presented in this report do not include any physically entrained solids, which typically account for much of the off-gas carryover on a mass basis. The high elemental mercury vapor content predicted at the DWPF Quencher inlet means that physically entrained solids could provide the necessary surface onto which elemental mercury vapor could condense, thereby coating the solids as well as the internal surfaces of the off-gas system with mercury. Clearly, there are many process benefits to be gained by removing the steam-stripping step from the CPC c

Zamecnik, J.; Choi, A.

2009-03-25T23:59:59.000Z

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


461

MODELING THE IMPACT OF ELEVATED MERCURY IN DEFENSE WASTE PROCESSING FACILITY MELTER FEED ON THE MELTER OFF-GAS SYSTEM-PRELIMINARY REPORT  

SciTech Connect (OSTI)

The Defense Waste Processing Facility (DWPF) is currently evaluating an alternative Chemical Process Cell (CPC) flowsheet to increase throughput. It includes removal of the steam-stripping step, which would significantly reduce the CPC processing time and lessen the sampling needs. However, its downside would be to send 100% of the mercury that comes in with the sludge straight to the melter. For example, the new mercury content in the Sludge Batch 5 (SB5) melter feed is projected to be 25 times higher than that in the SB4 with nominal steam stripping of mercury. This task was initiated to study the impact of the worst-case scenario of zero-mercury-removal in the CPC on the DWPF melter offgas system. It is stressed that this study is intended to be scoping in nature, so the results presented in this report are preliminary. In order to study the impact of elevated mercury levels in the feed, it is necessary to be able to predict how mercury would speciate in the melter exhaust under varying melter operating conditions. A homogeneous gas-phase oxidation model of mercury by chloride was developed to do just that. The model contains two critical parameters pertaining to the partitioning of chloride among HCl, Cl, Cl{sub 2}, and chloride salts in the melter vapor space. The values for these parameters were determined at two different melter vapor space temperatures by matching the calculated molar ratio of HgCl (or Hg{sub 2}Cl{sub 2}) to HgCl{sub 2} with those measured during the Experimental-Scale Ceramic Melter (ESCM) tests run at the Pacific Northwest National Laboratory (PNNL). The calibrated model was then applied to the SB5 simulant used in the earlier flowsheet study with an assumed mercury stripping efficiency of zero; the molar ratio of Cl-to-Hg in the resulting melter feed was only 0.4, compared to 12 for the ESCM feeds. The results of the model run at the indicated melter vapor space temperature of 650 C (TI4085D) showed that due to excessive shortage of chloride, only 6% of the mercury fed is expected to get oxidized, mostly as HgCl, while the remaining mercury would exist either as elemental mercury vapor (90%) or HgO (4%). Noting that the measured chloride level in the SB5 qualification sample was an order of magnitude lower than that used in the SB5 simulant, the degree of chloride shortage will be even greater. As a result, the projected level of HgCl in the actual SB5 melter exhaust will be even lower than 6% of the total mercury fed, while that of elemental mercury is likely to be greater than 90%. The homogeneous oxidation of mercury in the off-gas was deemed to be of primary importance based on the postulation that mercury and other volatile salts form submicron sized aerosols upon condensation and thus remain largely in the gas stream downstream of the quencher where they can deposit in the off-gas lines, Steam-Atomized Scrubbers (SAS), and High-Efficiency Mist Eliminator (HEME). Formation of these submicron semi-volatile salts in the condensate liquid is considered to be unlikely, so the liquid phase reactions were considered to be less important. However, subsequent oxidation of mercury in the liquid phase in the off-gas system was examined in a simplified model of the off-gas condensate. It was found that the condensate chemistry was consistent with further oxidation of elemental mercury to Hg{sub 2}Cl{sub 2} and conversion of HgO to chlorides. The results were consistent with the available experimental data. It should also be noted that the model predictions presented in this report do not include any physically entrained solids, which typically account for much of the off-gas carryover on a mass basis. The high elemental mercury vapor content predicted at the DWPF Quencher inlet means that physically entrained solids could provide the necessary surface onto which elemental mercury vapor could condense, thereby coating the solids as well as the internal surfaces of the off-gas system with mercury. Clearly, there are many process benefits to be gained by removing the steam-stripping step from the CPC c

Zamecnik, J.; Choi, A.

2010-08-18T23:59:59.000Z

462

Ultrahigh-sensitivity high-linearity photodetection system using a low-gain avalanche photodiode with an ultralow-noise readout circuit  

E-Print Network [OSTI]

A highly sensitive photodetection system with a detection limit of 1 photon/s was developed. This system uses a commercially available 200-mm-diameter silicon avalanche photodiode (APD) and an in-house-developed ultralow-noise readout circuit, which are both cooled to 77 K. When the APD operates at a low gain of about 10, it has a high-linearity response to the number of incident photons and a low excess noise factor. The APD also has high quantum efficiency and a dark current of less than 1 e/s at 77 K. This photodetection system will shorten the measurement time and enable higher spatial and wavelength resolution for near-field scanning optical microscopes.

Makoto Akiba; Mikio Fujiwara; Masahide Sasaki

2005-03-04T23:59:59.000Z

463

The Effect of Student Learning Styles on the Learning Gains Achieved When Interactive Simulations Are Coupled with Real-Time Formative Assessment via Pen-Enabled Mobile Technology  

E-Print Network [OSTI]

This paper describes results from a project in an undergraduate engineering physics course that coupled classroom use of interactive computer simulations with the collection of real-time formative assessment using pen-enabled mobile technology. Interactive simulations (free or textbook-based) are widely used across the undergraduate science and engineering curriculia to help actively engaged students increase their understanding of abstract concepts or phenomena which are not directly or easily observable. However, there are indications in the literature that we do not yet know the pedagogical best practices associated with their use to maximize learning. This project couples student use of interactive simulations with the gathering of real-time formative assessment via pen-enabled mobile technology (in this case, Tablet PCs). The research question addressed in this paper is: are learning gains achieved with this coupled model greater for certain types of learners in undergraduate STEM classrooms? To answer t...

Kowalski, F V

2013-01-01T23:59:59.000Z

464

First elevated-temperature performance testing of coated particle fuel compacts from the AGR-1 irradiation experiment  

SciTech Connect (OSTI)

In the AGR-1 irradiation experiment, 72 coated-particle fuel compacts were taken to a peak burnup of 19.5% fissions per initial metal atom with no in-pile failures. This paper discusses the first post-irradiation test of these mixed uranium oxide/uranium carbide fuel compacts at elevated temperature to examine the fuel performance under a simulated depressurized conduction cooldown event. A compact was heated for 400 h at 1600 degrees C. Release of 85Kr was monitored throughout the furnace test as an indicator of coating failure, while other fission product releases from the compact were periodically measured by capturing them on exchangeable, water-cooled deposition cups. No coating failure was detected during the furnace test, and this result was verified by subsequent electrolytic deconsolidation and acid leaching of the compact, which showed that all SiC layers were still intact. However, the deposition cups recovered significant quantities of silver, europium, and strontium. Based on comparison of calculated compact inventories at the end of irradiation versus analysis of these fission products released to the deposition cups and furnace internals, the minimum estimated fractional losses from the compact during the furnace test were 1.9 x 10-2 for silver, 1.4 x 10-3 for europium, and 1.1 x 10-5 for strontium. Other post-irradiation examination of AGR-1 compacts indicates that similar fractions of europium and silver may have already been released by the intact coated particles during irradiation, and it is therefore likely that the detected fission products released from the compact in this 1600 degrees C furnace test were from residual fission products in the matrix. Gamma analysis of coated particles deconsolidated from the compact after the heating test revealed that silver content within each particle varied considerably; a result that is probably not related to the furnace test, because it has also been observed in other as-irradiated AGR-1 compacts. X-ray imaging of selected particles was performed to examine the internal microstructure. This examination revealed variable irradiation performance of the coating layers, but sufficient statistical sampling is not yet available to identify any possible correlation to variation in individual particle fission product retention.

Charles A. Baldwin; John D. Hunn; Robert N. Morris; Fred C. Montgomery; Chinthaka M. Silva; Paul A. Demkowicz

2014-05-01T23:59:59.000Z

465

Influence of pre-, post-, and simultaneous perfusion of elevated calcium on the effect of ascending concentrations of lead on digoxin-induced cardiac arrest in isolated frog heart  

SciTech Connect (OSTI)

Cardiotoxicity of lead, a ubiquitous environmental pollutant, has already been documented as a potentially lethal, although rarely recognized, complication of lead intoxication. Further, it has already been reported from this laboratory that lead acetate (LA) preperfusion potentiated cardiotoxicity of digoxin (DGN) in isolated frog heart preparation and that exposure to elevated calcium (elev. Ca{sup 2+}) prior to, and simultaneously with LA at 10{sup {minus}7} M concentration, attenuated this potentiation. As an extension of this work, it was considered of interest to study the effect of perfusion of elev. Ca{sup 2+} (6.5 mM) prior to, after and simultaneously with ascending concentrations of lead (10{sup {minus}9}, 10{sup {minus}7} and 10{sup {minus}5}M) on DGN induced cardiac arrest (CA) in isolated frog heart, since Pb{sup 2+} and Ca{sup 2+} ions are known to compete with each other for the same target sites at the cellular level, an instance of competitive mass action effect. 15 refs., 1 fig., 1 tab.

Krishnamoorthy, M.S.; Muthu, P.; Parthiban, N. [Univ. of Madras (Indonesia)

1995-10-01T23:59:59.000Z

466

Welfare gains from financial liberalization  

E-Print Network [OSTI]

Financial liberalization has been a controversial issue, as empirical evidence for growth enhancing

Townsend, Robert

467

Adaptive gain improves reactor control  

SciTech Connect (OSTI)

An interesting application of the modern control theory technique called adaptive control is presently in use on a process located at a plant in the Standard Oil Co. (Ind.) system. The results of this application are: first, the transformation of an uncontrollable process to a controllable one; and, second, a significant economic savings to the corporation. It also shows that a detailed analysis of the mechanical, chemical and control systems can provide both the basis for revising an existing control system and some of the reasons why that system is inadequate. The contrast between classical and modern control theories is seen in four major areas. In classical systems, the controller manipulates the error to calculate its output. The error is subjected to a limited number of analog computing functions such as multiplication by a constant and integration. Each controller has one specific strategy--to hold the measured variable at the setpoint. And each controller controls only one variable, independent of all others. In a modern system, the controller can manipulate many different variables in addition to the error to compute its output. Its computing power is unlimited in a practical sense. It can do all classical computations plus many others, including a table look-up. The controller can independently change its strategy as a function of time or the condition of the process. It can also control many variables at one time to accomplish a complex objective. The implementation of a modern control theory project requires a good understanding of the dynamic, as well as the steady-state character of the process. As you can see we are limited only by our understanding of the process, our imagination, and the economics of the situation.

Whatley, M.J.; Pott, D.C.

1984-05-01T23:59:59.000Z

468

NOx Reduction through Efficiency Gain  

E-Print Network [OSTI]

Approach, Fifth Edition, McGraw-Hill, June 2005 Kuo, K. K., Principles of Combustion 2 nd Edition, Wiley, January 2005 Erickson, K. T., Plant-Wide Process Control, 1 st Edition, Wiley, April 2005 ESL-IE-07-05-42 Proceedings... putting financial stress on steam generation plants to adhere to environmental regulations we provide an incentive to do so. The simplicity and elegance of the CompuNOx system minimizes system changes. Control related changes consist...

Benz, R.; Thompson, R.; Staedter, M.

2007-01-01T23:59:59.000Z

469

Linda Gaines | Argonne National Laboratory  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces and Interfaces Sample6, 2011Liisa O'Neill About Us LiisaLin Wang

470

Lot sizing with inventory gains  

E-Print Network [OSTI]

nuclear plant refuelling, as well as how much energy should be produced by nuclear and non-nuclear units in each time period so as to satisfy the forecasted.

2006-11-23T23:59:59.000Z

471

Combined cycle power plant of SVZ Schwarze Pumpe GmbH operating experience gained with low calorific value fuel resulting from gasification processes  

SciTech Connect (OSTI)

Supported by experience gained over many years, Schwarze Pumpe GmbH (SVZ), the secondary raw material recycling centre, operates autothermal compression-type gasification plants with oxygen according to the fixed-bed and the entrained flow process, in which apart from lignite as the fuel to be gasified, residues containing C/H of varying consistency are gasified in an environmentally friendly manner. The purified gas acquired after scrubbing, partial conversion and desulfurization is mainly used as a synthesis gas for methanol synthesis and thus provided with a material use. For covering auxiliary requirements in electrical and process power, a combined-cycle power plant is operated, the main fuel of which is a low calorific value dual-process gas, primarily consisting of purified and purge gas. The volumes of purified and purge gases available to the combined-cycle power plant from the SVZ process equipment and their grades cannot be influenced by the combined-cycle power plant. It is shown that from a targeted modification of the dual-process gas temperature the Wobbe Index of dual-process gases with considerably varying parameters (calorific value, density) can be brought into the range required for running the gas turbine. Furthermore what is also shown is the operating strategy and control concept by which the combined-cycle power plant can maintain the pressure in the SVZ purified gas system and thus ultimately the gasification reactor operating pressure.

Kotschenreuther, H.; Hauptmann, W.

1998-07-01T23:59:59.000Z

472

Activation of the canonical nuclear factor-?B pathway is involved in isoflurane-induced hippocampal interleukin-1? elevation and the resultant cognitive deficits in aged rats  

SciTech Connect (OSTI)

Highlights: Isoflurane induces hippocampal IL-1? elevation and cognitive deficits in aged rats. Isoflurane transiently activates the canonical NF-?B pathway in aged rat hippocampus. NF-?B inhibitor mitigates isoflurane-induced IL-1? elevation and cognitive deficits. We report a linkage between NF-?B signaling, IL-1? expression, and cognitive changes. -- Abstract: Although much recent evidence has demonstrated that neuroinflammation contributes to volatile anesthetic-induced cognitive deficits, there are few existing mechanistic explanations for this inflammatory process. This study was conducted to investigate the effects of the volatile anesthetic isoflurane on canonical nuclear factor (NF)-?B signaling, and to explore its association with hippocampal interleukin (IL)-1? levels and anesthetic-related cognitive changes in aged rats. After a 4-h exposure to 1.5% isoflurane in 20-month-old rats, increases in I?B kinase and I?B phosphorylation, as well as a reduction in the NF-?B inhibitory protein (I?B?), were observed in the hippocampi of isoflurane-exposed rats compared with control rats. These events were accompanied by an increase in NF-?B p65 nuclear translocation at 6 h after isoflurane exposure and hippocampal IL-1? elevation from 1 to 6 h after isoflurane exposure. Nevertheless, no significant neuroglia activation was observed. Pharmacological inhibition of NF-?B activation by pyrrolidine dithiocarbamate markedly suppressed the IL-1? increase and NF-?B signaling, and also mitigated the severity of cognitive deficits in the Morris water maze task. Overall, our results demonstrate that isoflurane-induced cognitive deficits may stem from upregulation of hippocampal IL-1?, partially via activation of the canonical NF-?B pathway, in aged rats.

Li, Zheng-Qian; Rong, Xiao-Ying; Liu, Ya-Jie; Ni, Cheng [Department of Anesthesiology, Peking University Third Hospital, Beijing 100191 (China)] [Department of Anesthesiology, Peking University Third Hospital, Beijing 100191 (China); Tian, Xiao-Sheng [Neuroscience Research Institute and Department of Neurobiology, Key Laboratory for Neuroscience, Ministry of Education and Ministry of Public Health, Peking University Health Science Center, Beijing 100191 (China)] [Neuroscience Research Institute and Department of Neurobiology, Key Laboratory for Neuroscience, Ministry of Education and Ministry of Public Health, Peking University Health Science Center, Beijing 100191 (China); Mo, Na [Cancer Institute and Hospital, Chinese Academy of Medical Sciences, Beijing 100021 (China)] [Cancer Institute and Hospital, Chinese Academy of Medical Sciences, Beijing 100021 (China); Chui, De-Hua, E-mail: dchui@bjmu.edu.cn [Neuroscience Research Institute and Department of Neurobiology, Key Laboratory for Neuroscience, Ministry of Education and Ministry of Public Health, Peking University Health Science Center, Beijing 100191 (China)] [Neuroscience Research Institute and Department of Neurobiology, Key Laboratory for Neuroscience, Ministry of Education and Ministry of Public Health, Peking University Health Science Center, Beijing 100191 (China); Guo, Xiang-Yang, E-mail: puthmzk@163.com [Department of Anesthesiology, Peking University Third Hospital, Beijing 100191 (China)] [Department of Anesthesiology, Peking University Third Hospital, Beijing 100191 (China)

2013-09-06T23:59:59.000Z

473

A 3-Stage Shunt-Feedback Op-Amp having 19.2dB Gain, 54.1dBm OIP3 (2GHz), and 252 OIP3/PDC ratio  

E-Print Network [OSTI]

A 3-Stage Shunt-Feedback Op-Amp having 19.2dB Gain, 54.1dBm OIP3 (2GHz), and 252 OIP3/PDC ratio-Miller compensation demon- strating 19.2dB mid-band S21 gain, PDC = 1020mW. At 2GHz operation the amplifier shows 54.1dBm OIP3 and a record high OIP3/PDC ratio = 252. Through the use of a 350GHz f , fmax 0.5um InP HBT

Rodwell, Mark J. W.

474

A high-elevation, multi-proxy biotic and environmental record of MIS 64 from the Ziegler Reservoir fossil site, Snowmass Village, Colorado, USA  

SciTech Connect (OSTI)

In North America, terrestrial records of biodiversity and climate change that span Marine Oxygen Isotope Stage (MIS) 5 are rare. Where found, they provide insight into how the coupling of the oceanatmosphere system is manifested in biotic and environmental records and how the biosphere responds to climate change. In 20102011, construction at Ziegler Reservoir near Snowmass Village, Colorado (USA) revealed a nearly continuous, lacustrine/wetland sedimentary sequence that preserved evidence of past plant communities between ~140 and 55 ka, including all of MIS 5. At an elevation of 2705 m, the Ziegler Reservoir fossil site also contained thousands of well-preserved bones of late Pleistocene megafauna, including mastodons, mammoths, ground sloths, horses, camels, deer, bison, black bear, coyotes, and bighorn sheep. In addition, the site contained more than 26,000 bones from at least 30 species of small animals including salamanders, otters, muskrats, minks, rabbits, beavers, frogs, lizards, snakes, fish, and birds. The combination of macro- and micro-vertebrates, invertebrates, terrestrial and aquatic plant macrofossils, a detailed pollen record, and a robust, directly dated stratigraphic framework shows that high-elevation ecosystems in the Rocky Mountains of Colorado are climatically sensitive and varied dramatically throughout MIS 5

Ian M. Miller; Mitchell A. Plummer; Various Others

2014-10-01T23:59:59.000Z

475

Using dissolved noble gas and isotopic tracers to evaluate the vulnerability of groundwater resources in a small, high elevation catchment to predicted climate changes  

SciTech Connect (OSTI)

We use noble gas concentrations and multiple isotopic tracers in groundwater and stream water in a small high elevation catchment to provide a snapshot of temperature, altitude, and physical processes at the time of recharge; and to determine subsurface residence times of different groundwater components. They identify three sources that contribute to groundwater flow: (1) seasonal groundwater recharge with short travel times, (2) water from bedrock aquifers that have elevated radiogenic {sup 4}He, and (3) upwelling of deep fluids that have 'mantle' helium and hydrothermal carbon isotope signatures. Although a bimodal distribution in apparent groundwater age indicates that groundwater storage times range from less than a year to several decades, water that recharges seasonally is the largest likely contributor to stream baseflow. Under climate change scnearios with earlier snowmelt, the groundwater that moves through the alluvial aquifer seasonally will be depleted earlier, providing less baseflow and possible extreme low flows in the creek during summer and fall. Dissolved noble gas measurements indciate recharge temperatures are 5 to 11 degrees higher than would be expected for direct influx of snowmelt, and that excess air concentrations are lower than would be expected for recharge through bedrock fractures. Instead, recharge likely occurs over diffuse vegetated areas, as indicated by {delta}{sup 13}C-DIC values that are consistent with incorporation of CO{sub 2} from soil respiration. Recharge temperatures are close to or slightly higher than mean annual air temperature, and are consistent with recharge during May and June, when snowpack melting occurs.

Singleton, M J; Moran, J E

2009-10-02T23:59:59.000Z

476

Dosimetric effects of weight loss or gain during volumetric modulated arc therapy and intensity-modulated radiation therapy for prostate cancer  

SciTech Connect (OSTI)

Weight loss or gain during the course of radiation therapy for prostate cancer can alter the planned dose to the target volumes and critical organs. Typically, source-to-surface distance (SSD) measurements are documented by therapists on a weekly basis to ensure that patients' exterior surface and isocenter-to-skin surface distances remain stable. The radiation oncology team then determines whether the patient has undergone a physical change sufficient to require a new treatment plan. The effect of weight change (SSD increase or decrease) on intensity-modulated radiation therapy (IMRT) or volumetric modulated arc therapy (VMAT) dosimetry is not well known, and it is unclear when rescanning or replanning is needed. The purpose of this study was to determine the effects of weight change (SSD increase or decrease) on IMRT or VMAT dose delivery in patients with prostate cancer and to determine the SSD change threshold for replanning. Whether IMRT or VMAT provides better dose stability under weight change conditions was also determined. We generated clinical IMRT and VMAT prostate and seminal vesicle treatment plans for varying SSDs for 10 randomly selected patients with prostate cancer. The differences due to SSD change were quantified by a specific dose change for a specified volume of interest. The target mean dose, decreased or increased by 2.9% per 1-cm SSD decrease or increase in IMRT and by 3.6% in VMAT. If the SSD deviation is more than 1 cm, the radiation oncology team should determine whether to continue treatment without modifications, to adjust monitor units, or to resimulate and replan.

Pair, Matthew L. [Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX (United States); Du, Weiliang [Department of Radiation Physics, University of Texas MD Anderson Cancer Center, Houston, TX (United States); Rojas, Hector D.; Kanke, James E.; McGuire, Sean E.; Lee, Andrew K.; Kuban, Deborah A. [Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX (United States); Kudchadker, Rajat J., E-mail: rkudchad@mdanderson.org [Department of Radiation Physics, University of Texas MD Anderson Cancer Center, Houston, TX (United States)

2013-10-01T23:59:59.000Z

477

Global Economy and IT IT: Recovery and Growth Government and IT IT and Society Strengthening Economies Innovation in information technology (IT) has fueled unprecedented economic gains in the last 30  

E-Print Network [OSTI]

Global Economy and IT IT: Recovery and Growth Government and IT IT and Society Strengthening Economies Innovation in information technology (IT) has fueled unprecedented economic gains in the last 30-term stimulus to local economies but also position both developed and developing economies to compete

Narasayya, Vivek

478

Fatty acid synthase plays a role in cancer metabolism beyond providing fatty acids for phospholipid synthesis or sustaining elevations in glycolytic activity  

SciTech Connect (OSTI)

Fatty acid synthase is over-expressed in many cancers and its activity is required for cancer cell survival, but the role of endogenously synthesized fatty acids in cancer is unknown. It has been suggested that endogenous fatty acid synthesis is either needed to support the growth of rapidly dividing cells, or to maintain elevated glycolysis (the Warburg effect) that is characteristic of cancer cells. Here, we investigate both hypotheses. First, we compared utilization of fatty acids synthesized endogenously from {sup 14}C-labeled acetate to those supplied exogenously as {sup 14}C-labeled palmitate in the culture medium in human breast cancer (MCF-7 and MDA-MB-231) and untransformed breast epithelial cells (MCF-10A). We found that cancer cells do not produce fatty acids that are different from those derived from exogenous palmitate, that these fatty acids are esterified to the same lipid and phospholipid classes in the same proportions, and that their distribution within neutral lipids is not different from untransformed cells. These results suggest that endogenously synthesized fatty acids do not fulfill a specific function in cancer cells. Furthermore, we observed that cancer cells excrete endogenously synthesized fatty acids, suggesting that they are produced in excess of requirements. We next investigated whether lipogenic activity is involved in the maintenance of high glycolytic activity by culturing both cancer and non-transformed cells under anoxic conditions. Although anoxia increased glycolysis 23 fold, we observed no concomitant increase in lipogenesis. Our results indicate that breast cancer cells do not have a specific qualitative or quantitative requirement for endogenously synthesized fatty acids and that increased de novo lipogenesis is not required to sustain elevations in glycolytic activity induced by anoxia in these cells. - Highlights: Fatty acid synthase (FASN) is over-expressed in cancer but its function is unknown. We compare utilization of fatty acids produced by FASN to those derived exogenously. Cancer cells do not have a specific requirement for fatty acids produced by FASN. Fatty acids produced by FASN are in excess of cell requirements and are excreted. Increased FASN activity is not required to sustain elevations in glycolysis.

Hopperton, Kathryn E., E-mail: kathryn.hopperton@mail.utoronto.ca [Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada M5S 3E2 (Canada); Duncan, Robin E., E-mail: robin.duncan@uwaterloo.ca [Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada M5S 3E2 (Canada); Bazinet, Richard P., E-mail: richard.bazinet@utoronto.ca [Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada M5S 3E2 (Canada); Archer, Michael C., E-mail: m.archer@utoronto.ca [Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada M5S 3E2 (Canada); Department of Medical Biophysics, Faculty of Medicine, University of Toronto, Toronto, ON, Canada M5S 3E2 (Canada)

2014-01-15T23:59:59.000Z

479

Response of a tundra ecosystem to elevated atmospheric carbon dioxide and CO{sub 2}-induced climate change. Annual technical report  

SciTech Connect (OSTI)

Northern ecosystems contain up to 455 Gt of C in the soil active layer and upper permafrost. The soil carbon in these layers is equivalent to approximately 60% of the carbon currently in the atmosphere as CO{sub 2}. Much of this carbon is stored in the soil as dead organic matter. Its fate is subject to the net effects of global change on the plant and soil systems of northern ecosystems. The arctic alone contains about 60 Gt C, 90% of which is present in the soil active layer and upper permafrost. The arctic is assumed to have been a sink for CO{sub 2} during the historic and recent geologic past. The arctic has the potential to be a very large, long-term source or sink of CO{sub 2} with respect to the atmosphere. In situ experimental manipulations of atmospheric CO{sub 2}, indicated that there is little effect of elevated atmospheric CO{sub 2} on leaf level photosynthesis or whole-ecosystem CO{sub 2} flux over the course of weeks to years, respectively. However, there may be longer- term ecosystem responses to elevated CO{sub 2} that could ultimately affect ecosystem CO{sub 2} balance. In addition to atmospheric CO{sub 2}, climate may affect net ecosystem carbon balance. Recent results indicate that the arctic has become a source of CO{sub 2} to the atmosphere. This change coincides with recent climatic variation in the arctic, and suggests a positive feedback of arctic ecosystems on atmospheric CO{sub 2} and global change. The research proposed in this application has four principal aspects: (A) Long-term response of arctic plants and ecosystems to elevated atmospheric CO{sub 2}; (B) Circumpolar patterns of net ecosystem CO{sub 2} flux; (C) In situ controls by temperature and moisture on net ecosystem CO{sub 2} flux; (D) Scaling of CO{sub 2} flux from plot, to landscape, to regional scales (In conjunction with research proposed for NSF support).

Oechel, W.C.

1992-04-01T23:59:59.000Z

480

Responses of soil respiration to elevated CO2, air warming, and changing soil water availability in an old-field grassland  

SciTech Connect (OSTI)

Responses of soil respiration to atmospheric and climatic change will have profound impacts on ecosystem and global C cycling in the future. This study was conducted to examine effects on soil respiration of the concurrent driving factors of elevated atmospheric CO2 concentration, rising temperature, and changing precipitation in a constructed old-field grassland in eastern Tennessee, USA. Model ecosystems of seven old-field species in 12 open-top chambers (4 m in diameter) were treated with two CO2 (ambient and ambient plus 300 ppm) and two temperature (ambient and ambient plus 3 C) levels. Two split plots with each chamber were assigned with high and low soil moisture levels. During the 19-month experimental period from June 2003 to December 2004, higher CO2 concentration and soil water availability significantly increased mean soil respiration by 35.8% and 15.7%, respectively. The effects of air warming on soil respiration varied seasonally from small reductions to significant increases to no response, and there was no significant main effect. In the wet side of elevated CO2 chambers, air warming consistently caused increases in soil respiration, whereas in other three combinations of CO2 and water treatments, warming tended to decrease soil respiration over the growing season but increase it over the winter. There were no interactive effects on soil respiration among any two or three treatment factors irrespective of testing time period. Temperature sensitivity of soil respiration was reduced by air warming, lower in the wet than the dry side, and not affected by CO2 treatment. Variations of soil respiration responses with soil temperature and soil moisture ranges could be primarily attributable to the seasonal dynamics of plant growth and its responses to the three treatments. Using a conceptual model to interpret the significant relationships of treatment-induced changes in soil respiration with changes in soil temperature and moisture observed in this study, we conclude that elevated CO2, air warming, and changing soil water availability had both direct and indirect effects on soil respiration via changes in the three controlling factors: soil temperature, soil moisture, and C substrate. Our results demonstrate that the response of soil respiration to climatic warming should not be represented in models as a simple temperature response function. A more mechanistic understanding of the direct and indirect impacts of concurrent global change drivers on soil respiration is needed to facilitate the interpretation and projection of ecosystem and global C cycling in response to atmospheric and climate change.

Wan, Shiqiang [Chinese Academy of Sciences; Norby, Richard J [ORNL; Childs, Joanne [ORNL; Weltzin, Jake [University of Tennessee, Knoxville (UTK)

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain elevated privileges" 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.


481

Tantalum and vanadium response to shock-wave loading at normal and elevated temperatures. Non-monotonous decay of the elastic wave in vanadium  

SciTech Connect (OSTI)

The evolution of the elastic precursor waves in pure tantalum and vanadium is presented at normal and elevated temperatures over propagation distances that ranged from 0.125 to 3?mm. Measurements were performed in order to obtain experimental data about the temperature-rate dependence of the yield stress of the two metals. With increasing propagation distance, the rate of the decay of elastic precursor decreases, as the shear stress in the elastic precursor wave approaches the Peierls stresses. It has been found that the decay, with propagation distance, of the post-spike minimum of the spike-like elastic precursor wave in vanadium is essentially non-monotonous. The experiments also revealed that annealing of tantalum and vanadium increases their Hugoniot elastic limit. The anomalous increase of the high strain rate yield stress with temperature, as observed earlier for some FCC and HCP metals, has not been detected in these measurements.

Zaretsky, E. B. [Department of Mechanical Engineering, Ben Gurion University, 84105 Beer Sheva (Israel); Kanel, G. I. [Joint Institute for High Temperatures RAS, Izhorskaya 13, bld.2, 125412 Moscow (Russian Federation)

2014-06-28T23:59:59.000Z

482

Mixed Salts of LiTFSI and LiBOB for Stable LiFePO4-Based Batteries at Elevated Temperatures  

SciTech Connect (OSTI)

To achieve stable long-term cycling stability at elevated temperatures, mixed salts of LiTFSI and LiBOB are used to replace LiPF6 salt in non-aqueous electrolytes for LiFePO4-based batteries. It is found that adding LiBOB in LiTFSI-based electrolytes effectively prevents the severe corrosion to Al current collectors that often is observed in LiTFSI-based electrolytes, which have high thermal stability. The cells using LiTFSI-LiBOB-based electrolytes demonstrate superior high temperature (60 ?C) stability and very similar room temperature performance (i.e., cycling stability and rate capability) when compared to cells using the LiPF6-based electrolyte.

Chen, Xilin; Xu, Wu; Engelhard, Mark H.; Zheng, Jianming; Zhang, Yaohui; Ding, Fei; Qian, Jiangfeng; Zhang, Jiguang

2014-01-13T23:59:59.000Z

483

Effects of selected thermophilic microorganisms on crude oils at elevated temperatures and pressures; Quarterly report, January 1, 1990--March 31, 1990  

SciTech Connect (OSTI)

The objective of this program is to determine the chemical and physical effects of thermophilic organisms on crude oils and cores at elevated temperatures and pressures. Ultimately a data base will be generated which will be used in technical and economic feasibility studies leading to field application. Results of the biotreatment of the teapot Naval Petroleum Resume {number_sign}3(PR3) with BNL strain BNL-4-24 at 65{degree}C under 2000 psi of nitrogen and 80 psi of carbon dioxide are presented. Results are also briefly discussed on the biotreatment of Wilmington, CA crude with BNL-4-22 on the reduction of nickel porphyrin complex. 4 refs., 6 figs.

Premuzic, E.T.; Lin, M.S.

1990-03-01T23:59:59.000Z

484

Single-Cell Analysis of Ca ++ Changes in Human Lung Mast Cells: Graded vs. All-or-Nothing Elevations after IgE-mediated Stimulation  

E-Print Network [OSTI]

Abstract. Human lung mast cells were examined by digital video microscopy for changes in cytosolic free ionized calcium ([Ca]~) after stimulation with anti-IgE antibody or specific antigens. These studies sought to determine whether the mast cell response resembled a graded or an all-or-nothing process. Preliminary experiments indicated that labeling mast cells with fura-2 did not alter their response to IgE-mediated stimulation. Subsequent experiments established that an IgEmediated stimulus evoked an elevation of [Ca+] ~ from a baseline value of 85 nM to an average of 190 nM (range 60--450 nM, n = 23), with an average histamine release of 26%. There was a good correlation (Rs = 0.67) between the average net [Ca] ~ change and the subsequent histamine release (regression equation:

Donald Macglashan

485

A Comparison of the Corrosion Resistance of Iron-Based Amorphous Metals and Austenitic Alloys in Synthetic Brines at Elevated Temperature  

SciTech Connect (OSTI)

Several hard, corrosion-resistant and neutron-absorbing iron-based amorphous alloys have now been developed that can be applied as thermal spray coatings. These new alloys include relatively high concentrations of Cr, Mo, and W for enhanced corrosion resistance, and substantial B to enable both glass formation and neutron absorption. The corrosion resistances of these novel alloys have been compared to that of several austenitic alloys in a broad range of synthetic brines, with and without nitrate inhibitor, at elevated temperature. Linear polarization and electrochemical impedance spectroscopy have been used for in situ measurement of corrosion rates for prolonged periods of time, while scanning electron microscopy (SEM) and energy dispersive analysis of X-rays (EDAX) have been used for ex situ characterization of samples at the end of tests. The application of these new coatings for the protection of spent nuclear fuel storage systems, equipment in nuclear service, steel-reinforced concrete will be discussed.

Farmer, J C

2008-11-25T23:59:59.000Z

486

Effect of crystal-field split-off hole and heavy-hole bands crossover on gain characteristics of high Al-content AlGaN quantum well lasers  

E-Print Network [OSTI]

of high Al-content AlGaN quantum well lasers Jing Zhang, Hongping Zhao, and Nelson Tansu Citation: Appl of crystal-field split-off hole and heavy-hole bands crossover on gain characteristics of high Al-content Al characteristics of high Al-content AlGaN quantum wells QWs are analyzed for deep UV lasers. The effect of crystal

Gilchrist, James F.

487

"I Never Thought It Would Happen Here": White Privilege and Assumptions of Safety  

E-Print Network [OSTI]

reinforces existing stereotypes that associate people of color with the dangerous side of the safety continuum, but also harks back to a history when white space was violently protected and its isolation legally sanctioned. Using 155 newspaper articles taken...

Varela, Kay S

2014-05-03T23:59:59.000Z

488

A Shibboleth-Protected Privilege Management Infrastructure for e-Science Education  

E-Print Network [OSTI]

Watt,J. Sinnott,R.O. Jiang,J. Ajayi,O. Koetsier,J. 6th International Symposium on Cluster Computing and the Grid, CCGrid2006, May 2006, Singapore.

Watt, J.

489

A Shibboleth-Protected Privilege Management Infrastructure for e-Science Education  

E-Print Network [OSTI]

Watt,J. Ajayi,O. Jiang,J. Koetsier,J. Sinnott,J. to appear in 6th International Symposium on Cluster Computing and the Grid, CCGrid2006, May 2006, Singapore.

Watt, J.

490

E-Print Network 3.0 - angiogenic privilege angiogenic Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tumor Anti-Angiogenesis Summary: , Missouri, 63130-4899, USA, hms@wustl.edu Abstract The scheduling of angiogenic inhibitors to control... controls minimize the tumor vol- ume for...

491

Annual Report and Accounts 2005 I feel privileged to be leading  

E-Print Network [OSTI]

campuses, the investment made this year in facilities and expert staff strengthens our foundations as we planned investment in state-of- the-art buildings, facilities and our estate. This year saw the opening and oil prices rise. Policy and practice outside our control presented challenges during the year. Some

Miall, Chris

492

V-128: Xen Event Channel Tracking Pointer Bug Local Privilege Escalation |  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment of EnergyProgram2-26TheUtility-Scale WindDepartment of EnergyDepartment of

493

U-253: Citrix XenServer Denial of Service and Privilege Escalation  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyTheTwo New Energy Storage6ScriptingURL

494

Masculinity As Privileged Human Agency In H. G. Oesterhelds El Eternauta  

E-Print Network [OSTI]

Claudio. Mobilis in mobile: ciencia y tecnologa en ElEternauta y otros cuentos de ciencia ficcin. Buenos Aires:ms una conmovedora historia de ciencia ficcin; se pareca

Foster, David William

2013-01-01T23:59:59.000Z

495

Are Foreign Firms Privileged By Their Host Governments? Evidence From The 2000 World Business Environment Survey  

E-Print Network [OSTI]

Using the data from World Business Environment Survey (WBES) on over 10,000 firms across eighty one countries, this paper finds preliminary evidence that foreign firms enjoy significant regulatory advantages - as perceived ...

Huang, Yasheng

2005-06-03T23:59:59.000Z

496

Permit Types, Tiers, and Parking Privileges 2012-2013 Alr 07-01-2012 1  

E-Print Network [OSTI]

loading permit from booth. M (motorcycle permit) Motorcycle Spaces ME (Maple Avenue Complex) Perimeter

497

The PIKfyveArPIKfyveSac3 triad in human breast cancer: Functional link between elevated Sac3 phosphatase and enhanced proliferation of triple negative cell lines  

SciTech Connect (OSTI)

Highlights: We assess PAS complex proteins and phosphoinositide levels in breast cancer cells. Sac3 and ArPIKfyve are markedly elevated in triple-negative breast cancer cells. Sac3 silencing inhibits proliferation in triple-negative breast cancer cell lines. Phosphoinositide profiles are altered in breast cancer cells. This is the first evidence linking high Sac3 with breast cancer cell proliferation. -- Abstract: The phosphoinositide 5-kinase PIKfyve and 5-phosphatase Sac3 are scaffolded by ArPIKfyve in the PIKfyveArPIKfyveSac3 (PAS) regulatory complex to trigger a unique loop of PtdIns3PPtdIns(3,5)P{sub 2} synthesis and turnover. Whereas the metabolizing enzymes of the other 3-phosphoinositides have already been implicated in breast cancer, the role of the PAS proteins and the PtdIns3PPtdIns(3,5)P{sub 2} conversion is unknown. To begin elucidating their roles, in this study we monitored the endogenous levels of the PAS complex proteins in cell lines derived from hormone-receptor positive (MCF7 and T47D) or triple-negative breast cancers (TNBC) (BT20, BT549 and MDA-MB-231) as well as in MCF10A cells derived from non-tumorigenic mastectomy. We report profound upregulation of Sac3 and ArPIKfyve in the triple negative vs. hormone-sensitive breast cancer or non-tumorigenic cells, with BT cell lines showing the highest levels. siRNA-mediated knockdown of Sac3, but not that of PIKfyve, significantly inhibited proliferation of BT20 and BT549 cells. In these cells, knockdown of ArPIKfyve had only a minor effect, consistent with a primary role for Sac3 in TNBC cell proliferation. Intriguingly, steady-state levels of PtdIns(3,5)P{sub 2} in BT20 and T47D cells were similar despite the 6-fold difference in Sac3 levels between these cell lines. However, steady-state levels of PtdIns3P and PtdIns5P, both regulated by the PAS complex, were significantly reduced in BT20 vs. T47D or MCF10A cell lines, consistent with elevated Sac3 affecting directly or indirectly the homeostasis of these lipids in TNBC. Together, our results uncover an unexpected role for Sac3 phosphatase in TNBC cell proliferation. Database analyses, discussed herein, reinforce the involvement of Sac3 in breast cancer pathogenesis.

Ikonomov, Ognian C., E-mail: oikonomo@med.wayne.edu; Filios, Catherine, E-mail: cfilios@med.wayne.edu; Sbrissa, Diego, E-mail: dsbrissa@med.wayne.edu; Chen, Xuequn, E-mail: xchen@med.wayne.edu; Shisheva, Assia, E-mail: ashishev@med.wayne.edu

2013-10-18T23:59:59.000Z

498

Special Issue: High Elevation Forests  

E-Print Network [OSTI]

. They yield raw material for rustic homes, exquisite paneling, and life-giving energy. They capture, purify gathering, hunting, and places to wow visitors. (For the purpose of this report, high country forests

499

Special Issue: High Elevation Forests  

E-Print Network [OSTI]

(retired) Ari Stiller, Colorado Ski Country USA Robert Sturtevant, Senior Research Associate, Department

500

Elevator Pitches University of Birmingham  

E-Print Network [OSTI]

, Cyber Security, Telecoms, Unified Messaging, CRM (ACT), Storage Solutions, Disaster Recovery, Document;#12;#12;Thank You! Next Pitch #12;Software Tools to Program large distributed infrastructures such as Cloud, Cloud, security What we do - 9 PhD students and RAs -Worked at HP, BT and IBM Resulted in - software

Birmingham, University of