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Photographing UNT
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507 Matching Results
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[Corner View of Building]
Photograph of an unidentified building on the University of North Texas main campus; the exterior view is photographed in three-point perspective. The building is made of light-colored bricks with larger white quoins along the corner.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Exterior View of Information Sciences Building]
Photograph of an exterior view of Information Sciences Building, at the University of North Texas campus. In front of the brick building, there is a tree growing by a sidewalk.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Exterior View of Information Sciences Building]
Photograph of an exterior view of Information Sciences Building, at the University of North Texas campus. Four windows of the brick building are in view. A bench is sitting in front of it.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Exterior View of Information Sciences Building]
Photograph of an exterior view of Information Sciences Building, at the University of North Texas campus. There is a set of glass doors on the side of the brick building. A cement bench is in the center-foreground.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Exterior View of University of North Texas Campus]
Photograph of an exterior view of University of North Texas campus. Light snow is partially covering green grass. In the background, there is a view of Willis Library.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Exterior View of University of North Texas Campus]
Photograph of an exterior view of University of North Texas campus. In the foreground, there is a water drain. Light snow is partially covering green grass. In the background, there is a view of Willis Library.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Exterior View of University of North Texas Campus]
Photograph of an exterior view of University of North Texas campus. There is a mud puddle with a footprint in it beside a tree. In the background, there is a back view of Willis Library.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Exterior View of Willis Library]
Photograph of an exterior view of Willis Library at the University of North Texas. The brick building is several stories tall, with leafless trees surrounding it. In the background, there are other brick buildings.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Front Steps of Information Sciences Building]
Photograph of brick steps in front of Information Sciences Building, at the University of North Texas campus.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Grounds Outside of Building]
Photograph of grounds outside of a brick building on University of North Texas campus. Green ivy is covering the ground; a tree trunk is in the foreground. Shrubs line the brick building in the background.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Grounds Outside of Information Sciences Building]
Photograph of the grounds outside of the Information Sciences Building, at the University of North Texas campus. A tree is growing in between two sidewalks. In the background, there is a view of windows on the brick building.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Grounds Outside of Willis Library]
Photograph of the grounds outside of Willis Library, on University of North Texas campus. Light snow is partially covering the grass. In the background, there is a side-view of Willis Library.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Grounds Outside of Willis Library]
Photograph of the grounds outside of Willis Library, at the University of North Texas campus. There are green plants and a line of green shrubs in front of the building.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Plants Outside of Building]
Photograph of plants growing along an unidentified brick building, on University of North Texas campus. Light snow is covering the mulch around the plants. There is a drain pipe on the right side of the building.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[View of Steps Outside of Information Sciences Building]
Photograph of an exterior steps leading to Information Sciences Building, at the University of North Texas campus. The cement and rock steps have yellow stripes painted on the edges. A plant is growing to the right of the green rail.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[View of Steps Outside of Information Sciences Building]
Photograph of a set of steps outside of Information Sciences Building, at the University of North Texas campus. The rock and cement steps have yellow stripes pained on the edges. A plant is growing in the foreground, to the left of the steps. In the background, there is a view of the brick building.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
[Waterfall Outside of Willis Library]
Photograph of a fountain outside of Willis Library (left) at the University of North Texas main campus. The fountain has a waterfall flowing over bricks. In the background, there is a view of the Hurley Administration Building.
Date:
March 4, 2008
Creator:
Dickens, Hope
Object Type:
Photograph
System:
The Portal to Texas History
Generation of attosecond x-ray pulses with a multi-cycle two-color ESASE scheme
Generation of attosecond x-ray pulses is attracting much attention within the x-ray free-electron laser (FEL) user community. Several schemes using extremely short laser pulses to manipulate the electron bunches have been proposed. In this paper, we extend the attosecond two-color ESASE scheme proposed by Zholents et al. to the long optical cycle regime using a second detuned laser and a tapered undulator. Both lasers can be about ten-optical-cycles long, with the second laser frequency detuned from the first to optimize the contrast between the central and side current spikes. A tapered undulator mitigates the degradation effect of the longitudinal space charge (LSC) force in the undulator and suppresses the FEL gain of all side current peaks. Simulations using the LCLS parameters show a single attosecond x-ray spike of {approx} 110 attoseconds can be produced. The second laser can also be detuned to coherently control the number of the side x-ray spikes and the length of the radiation pulse.
Date:
March 4, 2009
Creator:
Ding, Y.; Huang, Z.; Ratner, D.; Bucksbaum, P. & Merdji, H.
Object Type:
Article
System:
The UNT Digital Library
CO{sub 2} capture for PC boilers using flue-gas recirculation : evaluation of CO{sub 2} recovery, transport, and utilization.
The U.S. Department of Energy (DOE) is investigating retrofitting boilers with flue gas recirculation as a strategy for CO{sub 2} recovery from conventional pulverized coal (PC) plants because of the current motivation to reduce greenhouse gas emissions. However, this technology was conceived nearly twenty years ago at Argonne National Laboratory as a low-cost CO{sub 2} source for enhanced oil recovery (EOR). The fundamental concept is to replace combustion air with oxygen diluted by recirculated CO{sub 2} from the flue gas. This eliminates N{sub 2}-CO{sub 2} separation, permitting more economical CO{sub 2} recovery than competing amine systems. A molar ratio of CO{sub 2}/O{sub 2} of {approx}3 is necessary to preserve the heat transfer performance and gas path temperatures, allowing this system to be applied as a retrofit.
Date:
March 4, 2002
Creator:
Doctor, R. D.; Molburg, J. C.; Brockmeier, N. F. & Mendelsohn, M.
Object Type:
Report
System:
The UNT Digital Library
Seminole Sentinel (Seminole, Tex.), Vol. 94, No. 40, Ed. 1 Sunday, March 4, 2001
Semiweekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
March 4, 2001
Creator:
Dow, M. Gene & Fisher, David
Object Type:
Newspaper
System:
The Portal to Texas History
The Quantum Efficiency and Thermal Emittance of Metal Photocathodes
Modern electron beams have demonstrated the brilliance needed to drive free electron lasers at x-ray wavelengths, with the principle improvements occurring since the invention of the photocathode gun. The state-of-the-art normalized emittance electron beams are now becoming limited by the thermal emittance of the cathode. In both DC and RF photocathode guns, details of the cathode emission physics strongly influence the quantum efficiency and the thermal emittance. Therefore improving cathode performance is essential to increasing the brightness of beams. It is especially important to understand the fundamentals of cathode quantum efficiency and thermal emittance. This paper investigates the relationship between the quantum efficiency and the thermal emittance of metal cathodes using the Fermi-Dirac model for the electron distribution. We derive the thermal emittance and its relationship to the quantum efficiency, and compare our results to those of others.
Date:
March 4, 2009
Creator:
Dowell, David H. & Schmerge, John F.
Object Type:
Article
System:
The UNT Digital Library
High sensitivity resonance frequency measurements of individualmicro-cantilevers using fiber optical interferometry
We describe a setup for the resonance frequency measurement of individual microcantilevers. The setup displays both high spatial selectivity and sensitivity to specimen vibrations by utilizing a tapered uncoated fiber tip. The high sensitivity to specimen vibrations is achieved by the combination of optical Fabry-Perot interferometry and narrow band RF detection. Wave fronts reflected on the specimen and on the fiber tip end face interfere, thus no reference plane on the specimen is needed, as demonstrated with the example of freestanding silicon nitride micro-cantilevers. The resulting system is integrated in a DB-235 dual beam FIB system, thereby allowing the measurement of micro-cantilever responses during observation in SEM mode. The FIB was used to modify the optical fiber tip. At this point of our RF system development, the microcantilevers used to characterize the detector were not modified in situ.
Date:
March 4, 2009
Creator:
Duden, Thomas & Radmilovic, Velimir
Object Type:
Article
System:
The UNT Digital Library
Role of Low Sulfur Diesel Fuel in Future Clean Transport Policy
None
Date:
March 4, 2001
Creator:
Eberhardt, James J.
Object Type:
Presentation
System:
The UNT Digital Library
Homeland Security: Air Passenger Prescreening and Counterterrorism
This report discusses about Boarder and Transportation Security Screening Coordination, System Integrity, Access and Data Retention, Key Operational Consideration and many more.
Date:
March 4, 2005
Creator:
Elias, Bart; Krouse, William J. & Rappaport, Edward B.
Object Type:
Report
System:
The UNT Digital Library