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384 Matching Results
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Technoeconomic Analysis of Biomethane Production from Biogas and Pipeline Delivery
This presentation summarizes "A Technoeconomic Analysis of Biomethane Production from Biogas and Pipeline Delivery".
Date:
October 18, 2010
Creator:
Jalalzadeh-Azar, A.
Object Type:
Presentation
System:
The UNT Digital Library
Copyright and Publication Agreements: Who Owns Your Work?
Presentation for the 2010 Open Access Symposium discussing ownership as interpreted by copyright and publication agreements.
Date:
May 18, 2010
Creator:
Buttler, Dwayne K.
Object Type:
Presentation
System:
The UNT Digital Library
Advancing Open Access Through Digital Services
Presentation for the 2010 Open Access Symposium discussing digital services using Georgia Tech University as a case study.
Date:
May 18, 2010
Creator:
Walters, Tyler
Object Type:
Presentation
System:
The UNT Digital Library
Open Access Publishing: Benefits, Challenges and Experiences
Presentation for the 2010 Open Access Symposium provides an overview of open access publishing as a whole and BioMed Central as an open access publisher.
Date:
May 18, 2010
Creator:
Kahn, Deborah
Object Type:
Presentation
System:
The UNT Digital Library
Disruptive Transformations and Open Access
Presentation for the 2010 Open Access Symposium discussing disruptions in how information is valued due to changing mediums and distribution models.
Date:
May 18, 2010
Creator:
Tanner, R. Michael
Object Type:
Presentation
System:
The UNT Digital Library
Voyages: The Trans-Atlantic Slave Trade Database -- A Case Study in Transitioning to Open Access
Presentation for the 2010 Open Access Symposium using the Trans-Atlantic Slave Trade Database as a case study for transitioning research to an open access model.
Date:
May 18, 2010
Creator:
Eltis, David, 1940- & Milewicz, Elizabeth Jean
Object Type:
Presentation
System:
The UNT Digital Library
Is Open Access the New Normal?
Presentation for the 2010 Open Access Symposium discussing the prevalence of open access resources and policies.
Date:
May 18, 2010
Creator:
Joseph, Heather
Object Type:
Presentation
System:
The UNT Digital Library
Open Access: An STM Journal Publisher's Perspective
Presentation for the 2010 Open Access Symposium discussing a commercial publisher's operations and perspective on open access
Date:
May 18, 2010
Creator:
Hunter, Karen
Object Type:
Presentation
System:
The UNT Digital Library
The Research University Imperative to Distribute Scholarly Materials
Presentation for the 2010 Open Access Symposium discussing the benefits of an active faculty role in distributing research through the institutional repository.
Date:
May 18, 2010
Creator:
Shulenburger, David
Object Type:
Presentation
System:
The UNT Digital Library
Designing the Optimal Open Access Mandate
Presentation for the 2010 Open Access Symposium addressing multiple issues involved in developing a university open access policy.
Date:
May 18, 2010
Creator:
Harnad, Stevan Robert 1945-
Object Type:
Presentation
System:
The UNT Digital Library
On the Correct Application of the 100-40-40 Rule for Combining Responses Due to three Directions of Earthquake Loading
The 100-40-40 rule is often used with the response spectrum analysis method to determine the maximum seismic responses from structural responses resulting from the three spatial earthquake components. This rule has been referenced in several recent Design Certification applications of nuclear power plants, and appears to be gaining in popularity. However, this rule is described differently in ASCE 4-98 and Regulatory Guide 1.92, consequently causing confusion on correct implementation of this rule in practice. The square root of the sum of the squares method is another acceptable spatial combination method and was used to justify the adequacy of the 100-40-40 rule during the development of the Regulatory Guide 1.92. The 100-40-40 rule, when applied correctly, is almost always conservative compared to the SRSS method, and is only slightly unconservative in rare cases. The purpose of this paper is to describe in detail the proper application of the 100-40-40 rule, as prescribed in ASCE 4-98 and in Regulatory Guide 1.92, and to clarify the confusion caused by the two different formats of this rule.
Date:
July 18, 2010
Creator:
Nie, J.; Morante, R.; Miranda, M. & Braverman, J.
Object Type:
Article
System:
The UNT Digital Library
Comparison of Ambient Radon Concentrations in Air in the Northern Mojave Desert from Continuous and Integrating Instruments
As part of a program to characterize and baseline environmental parameters, ambient radon-222 (Rn) monitoring was conducted in the rural community of Amargosa Valley, NV, the closest community to Yucca Mountain. Passive integrating and continuous Rn monitoring instruments were deployed adjacent to the Community Environmental Monitoring Program (CEMP) station in Amargosa Valley. The CEMP station provided real-time ambient gamma exposure and meteorological data used to correct the integrated Rn measurements, verified the meteorological data collected by the continuous Rn monitoring instrument, and for provided instrumentation for evaluating the relationships between meteorological conditions and Rn concentrations. Hourly Rn concentrations in air measured by the continuous Rn monitoring instrument (AlphaGUARD®) were compared to the average hourly values for the integrating Rn measurements (E-PERM®) by dividing the total Rn measurements by the number of hours the instruments were deployed. The results of the comparison indicated that average hourly ambient Rn concentrations as measured by both methods ranged from 0.2 to 0.4 pico-curies per liter of air. Ambient Rn values for the AlphaGUARD exhibited diurnal variations. When Rn concentrations were compared with measurements of temperature (T), barometric pressure, and relative humidity, the correlation (inversely) was highest with T, albeit weakly.
Date:
May 18, 2010
Creator:
Shafer, David S.; McGraw, David; Karr, Lynn H.; McCurdy, Greg; Kluesner, Tammy L.; Gray, Karen J. et al.
Object Type:
Report
System:
The UNT Digital Library
Development of Glass Matrices for HLW Radioactive Wastes
Vitrification is currently the most widely used technology for the treatment of high level radioactive wastes (HLW) throughout the world. Most of the nations that have generated HLW are immobilizing in either borosilicate glass or phosphate glass. One of the primary reasons that glass has become the most widely used immobilization media is the relative simplicity of the vitrification process, e.g. melt waste plus glass forming frit additives and cast. A second reason that glass has become widely used for HLW is that the short range order (SRO) and medium range order (MRO) found in glass atomistically bonds the radionuclides and governs the melt properties such as viscosity, resistivity, sulphate solubility. The molecular structure of glass controls contaminant/radionuclide release by establishing the distribution of ion exchange sites, hydrolysis sites, and the access of water to those sites. The molecular structure is flexible and hence accounts for the flexibility of glass formulations to waste variability. Nuclear waste glasses melt between 1050-1150 C which minimizes the volatility of radioactive components such as Tc{sup 99}, Cs{sup 137}, and I{sup 129}. Nuclear waste glasses have good long term stability including irradiation resistance. Process control models based on the molecular structure of glass have been …
Date:
March 18, 2010
Creator:
Jantzen, Carol M.
Object Type:
Book
System:
The UNT Digital Library
Affordable Health Care for America
A paper discussing the Patient Protection and Affordable Care Act.
Date:
March 18, 2010
Creator:
United States. House Committees on Ways and Means.
Object Type:
Report
System:
The UNT Digital Library
Yoakum Herald-Times (Yoakum, Tex.), Vol. 118, No. 33, Ed. 1 Wednesday, August 18, 2010
Weekly newspaper from Yoakum, Texas that includes local, state, and national news along with advertising.
Date:
August 18, 2010
Creator:
McCracken, Michael S.
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 116, No. 33, Ed. 1 Wednesday, August 18, 2010
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
August 18, 2010
Creator:
Henry, Mark
Object Type:
Newspaper
System:
The Portal to Texas History
The SEMATECH Berkeley MET pushing EUV development beyond 22-nm half pitch
Microfield exposure tools (METs) play a crucial role in the development of extreme ultraviolet (EUV) resists and masks, One of these tools is the SEMATECH Berkeley 0.3 numerical aperture (NA) MET, Using conventional illumination this tool is limited to approximately 22-nm half pitch resolution. However, resolution enhancement techniques have been used to push the patterning capabilities of this tool to half pitches of 18 nm and below, This resolution was achieved in a new imageable hard mask which also supports contact printing down to 22 nm with conventional illumination. Along with resolution, line-edge roughness is another crucial hurdle facing EUV resists, Much of the resist LER, however, can be attributed to the mask. We have shown that intenssionally aggressive mask cleaning on an older generation mask causes correlated LER in photoresist to increase from 3.4 nm to 4,0 nm, We have also shown that new generation EUV masks (100 pm of substrate roughness) can achieve correlated LER values of 1.1 nm, a 3x improvement over the correlated LER of older generation EUV masks (230 pm of substrate roughness), Finally, a 0.5-NA MET has been proposed that will address the needs of EUV development at the 16-nm node and beyond, The …
Date:
March 18, 2010
Creator:
Naulleau, P.; Anderson, C. N.; Backlea-an, L.-M.; Chan, D.; Denham, P.; George, S. et al.
Object Type:
Article
System:
The UNT Digital Library
The Arctic Lower Troposphere Observed Structure (ALTOS) Campaign
The ALTOS campaign focuses on operating a tethered observing system for routine in situ sampling of low-level (< 2 km) Arctic clouds. It has been a long-term hope to fly tethered systems at Barrow, Alaska, but it is clear that the Federal Aviation Administration (FAA) will not permit in-cloud tether systems at Barrow, even if unmanned aerial vehicle (UAV) operations are allowed in the future. We have provided the scientific rationale for long-term, routine in situ measurements of cloud and aerosol properties in the Arctic. The existing restricted air space at Oliktok offers an opportunity to do so.
Date:
October 18, 2010
Creator:
Verlinde, J.
Object Type:
Report
System:
The UNT Digital Library
EUV mask surface cleaning effects on lithography process performance
The reflective, multilayer based, mask architectures for extreme ultraviolet (EUV) lithography are highly susceptible to surface oxidation and contamination. As a result, EUV masks are expected to undergo cleaning processes in order to maintain the lifetimes necessary for high volume manufacturing. For this study, the impact of repetitive cleaning of EUV masks on imaging performance was evaluated. Two, high quality industry standard, EUV masks are used for this study with one of the masks undergoing repeated cleaning and the other one kept as a reference. Lithographic performance, in terms of process window analysis and line edge roughness, was monitored after every two cleans and compared to the reference mask performance. After 8x clean, minimal degradation is observed. The cleaning cycles will be continued until significant loss imaging fidelity is found.
Date:
June 18, 2010
Creator:
George, Simi; Baclea-an, Lorie Mae; Naulleau, Patrick; Chen, Robert J. & Liang, Ted
Object Type:
Article
System:
The UNT Digital Library
ARM Climate Research Facility Monthly Instrument Report September 2010
The purpose of this report is to provide a concise but comprehensive overview of Atmospheric Radiation Measurement Climate Research Facility instrumentation status. The report is divided into the following five sections: (1) new instrumentation in the process of being acquired and deployed, (2) field campaigns, (3) existing instrumentation and progress on improvements or upgrades, (4) proposed future instrumentation, and (5) Small Business Innovation Research instrument development.
Date:
October 18, 2010
Creator:
Voyles, J. W.
Object Type:
Report
System:
The UNT Digital Library
Magnetic Measurement of the Background Field in the Undulator Hall
The steel present in the construction of the undulator hall facility has the potential for changing the ambient fields present in the undulator hall. This note describes a measurement done to make a comparison between the fields in the hall and in the Magnetic Measurement Facility. In order for the undulators to have the proper tuning, the background magnetic field in the Undulator Hall should agree with the background field in the Magnetic Measurements Facility within .5 gauss. In order to verify that this was the case measurements were taken along the length of the undulator hall, and the point measurements were compared to the mean field which was measured on the MMF test bench.
Date:
November 18, 2010
Creator:
Fisher, Andrew; Nuhn, Heinz-Dieter & Welch, James
Object Type:
Report
System:
The UNT Digital Library
Thermal Tests of Undulator Quad
Running at the nominal temperature, the undulator quadrupole has a several degree temperature increase. This note describes the test used to determine the effect on the undulator integrals from the temperature gradient caused by the heat from the quadrupole conducting down the beam pipe. The undulator quadrupoles running at their nominal current of 4 amps heat up approximately 4 degrees Celsius; this magnet in turn heats up the beampipe which goes into the undulator. The heating ends up introducing a thermal gradient across the undulator which causes small changes in the magnetic field of the heated poles. By measuring the temperature change in the poles we can model the effects on the field and determine what the magnetic errors will be.
Date:
November 18, 2010
Creator:
Fisher, Andrew
Object Type:
Report
System:
The UNT Digital Library
ARM Climate Research Facility Monthly Instrument Report July 2010
The purpose of this report is to provide a concise but comprehensive overview of Atmospheric Radiation Measurement Climate Research Facility instrumentation status. The report is divided into the following five sections: (1) new instrumentation in the process of being acquired and deployed, (2) field campaigns, (3) existing instrumentation and progress on improvements or upgrades, (4) proposed future instrumentation, and (5) Small Business Innovation Research instrument development.
Date:
August 18, 2010
Creator:
Voyles, J. W.
Object Type:
Report
System:
The UNT Digital Library
Analytical Data Report for Sediment Samples Collected From 200 BP 5 OU, C7514 (299-E28-30) L-Well
This an analytical data report for samples received from BP-5 L Well. This report is being prepared for CHPRC.
Date:
June 18, 2010
Creator:
Lindberg, Michael J.
Object Type:
Report
System:
The UNT Digital Library