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527 Matching Results
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[Students Gathering in Groups in a School Hallway]
Photograph of students gathering in groups in a school hallway. The photo is out of focus, but there are multiple groups of students walking to class.
Date:
February 15, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Students learn brick laying skills]
Students learn to lay bricks in a vocational skills class at Diamond Hill-Jarvis High School in Fort Worth, Texas.
Date:
February 15, 2006
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Students Socializing Between Classes in a Hallway]
Students socializing in the hallways between classes at school. There are multiple groups of student around the hallway.
Date:
February 15, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Students Walking Through a School Hallway]
Photograph of students making their way through a school's hallway. There are multiple groups of students wearing different colored clothing.
Date:
February 15, 2006
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Students Walking Through a School Hallway]
Photograph of students walking through a school hallway. There are multiple groups of students on different side of the hallway, and a student is walking towards the camera.
Date:
February 15, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Three students work on the roof of a structure they are building]
Three students participate in a vocational class at Diamond Hill-Jarvis High School, Fort Worth, Texas. They are working on the roof of a structure their class is building. These students and their classmates will participate in a competition to take place in Waco, Texas that will measure their abilities against the best students in the United States.
Date:
February 15, 2006
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Three women participate in a dance class]
Three young women participate in a dance class.
Date:
February 15, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Women take a dance class]
Young women line up during a dance class.
Date:
February 15, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
Oral History Interview with Bervin Caswell, February 15, 2001
A video interview with Dr. Bervin O. Caswell (McMurry class of 1938) in which Dr. Caswell discusses his memories of McMurry. Dr. Caswell was a long-time United Methodist minister in New Mexico and West Texas, and received an honorary Doctor of Divinity from McMurry in 1964 and a lifetime achievement award from McMurry in 2004.
Date:
February 15, 2001
Creator:
Caswell, Bervin O.
Object Type:
Video
System:
The Portal to Texas History
Integration of Radiation-Hard Magnetic Random Access Memory with CMOS ICs
The research undertaken in this LDRD-funded project addressed the joint development of magnetic material-based nonvolatile, radiation-hard memory cells with Sandia National Laboratory. Specifically, the goal of this project was to demonstrate the intrinsic radiation-hardness of Giant Magneto-Resistive (GMR) materials by depositing representative alloy combinations upon radiation-hardened silicon-based integrated circuits. All of the stated goals of the project were achieved successfully. The necessary films were successfully deposited upon typical integrated circuits; the materials retained their magnetic field response at the highest radiation doses; and a patterning approach was developed that did not degrade the as-fabricated properties of the underlying circuitry. These results establish the feasibility of building radiation-hard magnetic memory cells.
Date:
February 15, 2000
Creator:
Cerjan, C. J. & Sigmon, T. W.
Object Type:
Report
System:
The UNT Digital Library
University Press (Beaumont, Tex.), Vol. 78, No. 30, Ed. 1 Friday, February 15, 2002
Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local, national, and campus news along with advertising.
Date:
February 15, 2002
Creator:
Chand, Daniel
Object Type:
Newspaper
System:
The Portal to Texas History
Inverse Scattering Approach to Improving Pattern Recognition
The Helmholtz machine provides what may be the best existing model for how the mammalian brain recognizes patterns. Based on the observation that the ''wake-sleep'' algorithm for training a Helmholtz machine is similar to the problem of finding the potential for a multi-channel Schrodinger equation, we propose that the construction of a Schrodinger potential using inverse scattering methods can serve as a model for how the mammalian brain learns to extract essential information from sensory data. In particular, inverse scattering theory provides a conceptual framework for imagining how one might use EEG and MEG observations of brain-waves together with sensory feedback to improve human learning and pattern recognition. Longer term, implementation of inverse scattering algorithms on a digital or optical computer could be a step towards mimicking the seamless information fusion of the mammalian brain.
Date:
February 15, 2005
Creator:
Chapline, G & Fu, C
Object Type:
Article
System:
The UNT Digital Library
Radiological risk assessment for the remote-handled transuranic waste storage options at Argonne National Laboratory - East.
Interim storage of the remote-handled transuranic (RH/TRU) waste is needed at Argonne National Laboratory-East (ANL-E). Two on-site facilities, the northwest (NW) vaults in the 317 Area and the converted spent nuclear fuel pool in Building 331, were identified as potential storage locations through previous studies. To assist the decision making process of selecting a storage location, radiological risk assessments were conducted to analyze potential radiation exposures that would be associated with storage of the RH/TRU waste in these two facilities. Three drum storage scenarios (one for the 317 Area and two for Building 331) considering different drum handling procedures and stacking patterns were developed. Time-motion information on worker activities that would occur in the procedures was collected and recorded in spreadsheets. Using the time-motion information, potential external doses were estimated for the involved workers for each step in the procedures. The sum of the potential external doses over all the activity steps gave the total collective dose for each scenario. The results show that during the storage phase, storing waste drums in half-liners in Building 331 would result in the lowest collective radiation exposure; however, it would also require the most human resources. When retrieving waste drums for off-site shipment …
Date:
February 15, 2002
Creator:
Cheng, J. J.; Avci, H.; Hecker, D.; Bray, W.; Bray, T. & Grandy, C.
Object Type:
Article
System:
The UNT Digital Library
Three-dimensional control of light in a two-dimensional photonic crystal slab
A two-dimensional (2D) photonic crystal is an attractive alternative and complimentary to its 3D counterpart, due to fabrication simplicity. A 2D crystal, however, confines light only in the 2D plane, but not in the third direction, the z-direction. Earlier experiments show that such a 2D system can exist, providing that the boundary effect in z-direction is negligible and that light is collimated in the 2D plane. Nonetheless, the usefulness of such 2D crystals is limited because they are incapable of guiding light in z-direction, which leads to diffraction loss. This drawback presents a major obstacle for realizing low-loss 2D crystal waveguides, bends and thresholdless lasers. A recent theoretical calculation, though, suggests a novel way to eliminate such a loss with a 2D photonic crystal slab. The concept of a lightcone is introduced as a criterion for fully guiding and controlling light. Although the leaky modes of a crystal slab have been studied, there have until now no experimental reports on probing its guided modes and band gaps. In this paper, a waveguide-coupled 2D photonic crystal slab is successfully fabricated from a GaAs/Al{sub x}O{sub y} material system and its intrinsic transmission properties are studied. The crystal slab is shown to have …
Date:
February 15, 2000
Creator:
Chow, Kai-Cheung; Lin, Shawn-Yu; Johnson, S. G.; Villeneuve, P. R.; Joannopoulos, J. D.; Wendt, Joel R. et al.
Object Type:
Article
System:
The UNT Digital Library
Senior Recital: 2007-02-15 — Eun-Hyung (Susie) Chung, Piano
Access:
Use of this item is restricted to the UNT Community
Senior recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Bachelor of Music (BM) in Performance degree.
Date:
February 15, 2007
Creator:
Chung, Eun-Hyung
Object Type:
Sound
System:
The UNT Digital Library
WASTE CHARACTERIZATION OF POLYMERIC COMPONENTS EXPOSED TO TRITIUM GAS
A recent independent review led to uncertainty about the technical basis for characterizing the residual amount of tritium in polymer components used in the Savannah River Site Tritium Facilities that are sent for waste disposal. A review of a paper published in the open literature firmly establishes the basis of the currently used characterization, 10 Ci/cc. Information provided in that paper about exposure experiments performed at the DOE Mound Laboratory allows the calculation of the currently used characterization. These experiments involved exposure of high density polyethylene (HD-PE) to initially 1 atm tritium gas. In addition, a review of recent research at the Savannah River Site not only further substantiates this characterization, but also establishes its use for ultra-high molecular weight polyethylene (UHMW-PE), polytetrafluoroethylene (PTFE, a trade name is Teflon{reg_sign}), and Vespel{reg_sign} polyimide. 10 Ci/cc tritium is a representative characterization for any type of polymer components exposed at ambient temperature and at approximately 1 atm. tritium gas.
Date:
February 15, 2008
Creator:
Clark, E
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 86, No. 81, Ed. 1 Thursday, February 15, 2007
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 15, 2007
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 88, No. 46, Ed. 1 Friday, February 15, 2008
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 15, 2008
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 89, No. 46, Ed. 1 Sunday, February 15, 2009
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 15, 2009
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
Three-dimensional controlled-source electromagnetic and magnetotelluric joint inversion
The growing use of the controlled-source electromagnetic method (CSEM) and magnetotellurics (MT) for exploration applications has been driving the development of data acquisition technologies, and three-dimensional (3-D) modeling and imaging techniques. However, targeting increasingly complex geological environments also further enhances the problems inherent in large-scale inversion, such as non-uniqueness and resolution issues. In this paper, we report on two techniques to mitigate these problems. We use 3-D joint CSEM and MT inversion to improve the model resolution. To avoid the suppression of the resolution capacities of one data type, and thus to balance the use of inherent, and ideally complementary information content, different data reweighting schemes are proposed. Further, a hybrid model parameterization approach is presented, where traditional cell-based model parameters are used simultaneously within a parametric inversion. The idea is to limit the non-uniqueness problem, typical for 3-D imaging problems, in order to allow for a more focusing inversion. The methods are demonstrated using synthetic data generated from models with a strong practical relevance.
Date:
February 15, 2009
Creator:
Commer, M. & Newman, G.A.
Object Type:
Article
System:
The UNT Digital Library
The Message, Volume 44, Number 13, February 2009
Newsletter of Congregation Beth Yeshurun in Houston, including news and events, upcoming services, member announcements, editorials, and other information of interest to congregants.
Date:
February 15, 2009
Creator:
Congregation Beth Yeshurun (Houston, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Lessons Learned from an External Review of the Savannah River Site Saltstone Performance Assessment Program
None
Date:
February 15, 2005
Creator:
Cook, James R.
Object Type:
Article
System:
The UNT Digital Library
Density Measurements of Be Shells
The purpose of this memo is to lay out the uncertainties associated with the measurement of density of Be ablators by the weigh and volume method. I am counting on the readers to point out any faulty assumptions about the techniques or uncertainties associated with them. Based on the analysis presented below we should expect that 30 {micro}m thick shells will have an uncertainty in the measured density of about 2% of the value, coming more or less equally from the mass and volume measurement. The uncertainty is roughly inversely proportional to the coating thickness, thus a 60 {micro}m walled shell would result in a 1% uncertainty in the density.
Date:
February 15, 2005
Creator:
Cook, R C
Object Type:
Report
System:
The UNT Digital Library
The Safe and Drug-Free Schools and Communities Act: Reauthorization and Appropriations
This report discusses the 107th Congress the Safe and Drug-Free Schools and Communities Act reauthorization and appropriations to fun the the Safe and Drug-Free Schools and Communities Act program, and possible 110th Congress reauthorization issues. Updated: 02/15/2005
Date:
February 15, 2005
Creator:
Cooper, Edith Fairman
Object Type:
Report
System:
The UNT Digital Library