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open access

Geometry, groceries, and gardens: Learning mathematics and social justice through a nested, equity-directed instructional approach

Description: Authors of the article addressed the call for explorations of how BIPOC students’ “experiences in secondary mathematics classrooms might advance transformative, equity-focused, pedagogical models” by exploring how a nested, equity-directed approach created different kinds of opportunities for students to take up, shift, or resist what it means to teach, learn, and do mathematics. Specifically, authors looked at efforts to engage equity-directed dominant and critical approaches through a series … more
Date: June 10, 2023
Creator: Harper, Frances K. & Kudaisi, Queshonda J.
Partner: UNT College of Education
open access

Unusual Mathematical Approaches Untangle Nervous Dynamics

Description: Article reports that the massive amount of available neurodata suggests the existence of a mathematical backbone underlying neuronal oscillatory activities. The authors assert that the Monge’s theorem might contribute to our visual ability of depth perception and the brain connectome can be tackled in terms of tunnelling nanotubes.
Date: October 14, 2022
Creator: Tozzi, Arturo & Mariniello, Lucio
Partner: UNT College of Science

[Vibrant MADI Art Installation Adds Color and Playfulness to Marshall's Wood Building]

Description: Discover the captivating MADI Art installation on the west wall of the Wood Building in Marshall, Texas. Created by renowned artist Volf Roitman, this installation celebrates asymmetry, three-dimensionality, and vibrant colors, bringing a sense of joy and excitement to the community. Made possible by the support of Edmund and Anna Wood, this artwork adds a dynamic contrast to the historical surroundings and serves as a symbol of artistic creativity and sustainable design. Experience the energy … more
Date: October 1996
Creator: Mallory, Randy
Partner: UNT Libraries Special Collections
open access

First-principles study of diffusion and interactions of hydrogen with silicon, phosphorus, and sulfur impurities in nickel

Description: Article systematically studying the effect of Si, P, and S impurities on the diffusion and binding of an H atom in a face-centered-cubic (FCC) Ni lattice using density functional theory (DFT),
Date: March 26, 2019
Creator: Paranjape, Priyanvada; Gopal, Priya & Srinivasan, S. G.
Partner: University of North Texas
open access

Molecular Geometry and the Vapor Pressure of Isotopic Molecules: C₂H₃D and C¹²H₂=C¹³H₂

Description: The isotopic vapor pressure ratio between monodeuteroethylene and ordinary ethylene has been measured in the temperature range 120°-180°K by differential manometry. The inverse isotope effect with C₂¹²H₃D is less than one‐half the effect observed with the dideuteroethylenes. This deviation from the rule of the geometric mean gives further support to the structural theory of isotopic vapor pressure effects and confirms the importance of quantum corrections of the order of (ℏ/kT)⁴ and higher. Vap… more
Date: 1962
Creator: Bigeleisen, Jacob; Stern, Marvin J. & Van Hook, W. Alexander
Partner: UNT Libraries Government Documents Department
open access

Calculation of Average Flux in Moderator of Water Lattices by Means of a Relaxation Method

Description: The following report concerns the application of a relaxation mesh method for the determination of the average flux within the moderator of a light water moderated, 1.027 per cent U-235, hexagonal lattice with a volume ratio (V_H2O + V_Al)/V_Uranium of 4:1. It was hoped that the calculation would enable one to determine any differences in flux which might result from the fact that the unit cell is a hexagon instead of a cylinder. Because we were primarily interested in the effect due to geometr… more
Date: March 24, 1953
Creator: Oleksa, S. & Mozer, B.
Partner: UNT Libraries Government Documents Department
open access

The Approximation with Anisotropic Effects for Cylindrical Geometry

Description: The method of spherical harmonic tensors developed Mark for solving the Boltzmann transport equation in isotropic media is herein extended to anisotropic media for cylindrical geometry. A formal solution is given for the case of two concentric cylindrical media, A and B, but no numerical work has yet been done. The following treatment differs from a similar one by the H. K. Ferguson Co. in that the external medium B is assumed to be both a neutron absorber and finite in extent rather than a non… more
Date: January 22, 1953
Creator: Fleck, J.
Partner: UNT Libraries Government Documents Department
open access

Program on the IBM 709 Digital Computer of the P3 Approximation to the Boltzmann Transports equation in Cylindrical Geometry

Description: In formulating this general diffusion theory expression which represents the neutron balance in a nuclear chain reactor the following assumptions were made : (1) the medium through which the neutrons are diffusing has a low neutron capture cross section, (2) the region in which the flux distribute is being described is two or three mean free paths from strong sources and sinks or from a boundary. Certainly, is going to the lattice cell of a receptor, both of the above conditions are violated; f… more
Date: June 17, 1959
Creator: Matsumoto, D. D. & Richey, C. R.
Partner: UNT Libraries Government Documents Department
open access

Theory of Cusped Geometries

Description: "The loss of particles through a cusp of a particular containment geometry utilizing cusped magnetic field lies is considered. A velocity space loss criterion analogous to the loss cone in the mirror machine is derived. The effect of a uniform longitudinal magnetic field perpendicular to the containing field is considered and a loss criterion is derived. The effect of the longitudinal field is to decrease cusp losses.
Date: November 15, 1960
Creator: Kileen, John
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: TV station]

Description: Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a news story about the country's first educational television station at the University of Houston.
Date: May 27, 1953
Duration: 2 minutes 39 seconds
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
captions transcript

[Things About Shape]

Description: A video about the differences between shapes and how they are all around us. This video's goal is to help children become more aware of their visual environment.
Date: June 21, 1983
Duration: 41 minutes 08 seconds
Creator: University of North Texas. Center for Media Production.
Partner: UNT Libraries Special Collections
open access

Geometric Imagery

Description: It was those problems and possibilities I wished to explore in my problem in lieu of thesis. While the simple, geometric images were very satisfying to that part of myself that craves order and rationality, it was all too easy to make work that was dull and uninteresting. I wanted to find a way to produce rich, sensuous, engaging work using only simple geometric forms.
Date: May 1996
Creator: Dodd, Guthrie McRae
Partner: UNT Libraries
open access

Parameters and design considerations for tomographic transmission scanners

Description: The design of transverse axial transmission scanners for reconstruction tomography involves many interrelated parameters and conflicting requirements. We have investigated some of those parameters and their interactions and, where appropriate, attempted to optimize them. It is convenient to group the considerations under four headings: (1) Geometrical factors (basic configurations, rectilinear and fan geometry, moving detectors or static arrays, spatial response variations and field uniformity,… more
Date: January 1, 1976
Creator: Pentlow, K. S.; Beattie, J. W. & Laughlin, J. S.
Partner: UNT Libraries Government Documents Department
open access

Tracking and shadowing models for solar collection systems

Description: A unified, systematic method, based on vector algebra, has been presented from which numerous geometric results, important to the effective collection of solar energy, can be deduced. Results were obtained in a straightforward manner from first principles. Since the results are general in nature, local weather bureau data can be used effectively when comparing various proposed systems. Furthermore, the generality of the results allows the influence of system parameters to be investigated with a… more
Date: January 1, 1977
Creator: Schimmel, W. P. Jr.; Hickox, C. E. & Lee, D. O.
Partner: UNT Libraries Government Documents Department
open access

Search for backwards produced exotic meson resonances and study of particle spectra and mass distributions in the reaction. pi. /sup +/ + P. -->. n (forward) + X/sup + +/ at 8. 4 GeV/c. [Upper limits, G parity, 8. 4 GeV/c]

Description: Results are reported from a hybrid experiment designed to search for backwards produced I = 2 exotic meson resonances by investigating the backward scattering reactions: ..pi../sup +/ + p ..-->.. in (forward) + ..pi../sup +/..pi../sup +/, ..pi../sup +/..pi../sup +/..pi../sup +/..pi../sup -/, ..pi../sup +/..pi../sup +/..pi../sup +/..pi../sup +/..pi../sup -/..pi../sup -/, and p anti p..pi../sup +/..pi../sup +/ at an incident pion momentum of 8.4 GeV/c. The SLAC 15'' rapid cycling bubble chamber, … more
Date: August 1, 1975
Creator: Alam, M. S.; Brabson, B. B. & Galloway, K.
Partner: UNT Libraries Government Documents Department
open access

Three-dimensional imaging with large-area positron cameras

Description: Cameras for nuclear medicine imaging which use the two back-to-back gamma rays from a positron annihilation have the unique property of being able to give images of positron-emitting radionuclide distributions without the use of collimators and the associated large loss of intensity. Cameras with two parallel opposing planar gamma-ray detectors are now commonly used without camera movement to give tomographic images of a number of transverse planes through the positron emitting object. Each of … more
Date: June 1, 1977
Creator: Perez-Mendez, V.; Chang, L. T.; Lenahan, J. P. & Macdonald, B.
Partner: UNT Libraries Government Documents Department
open access

Improved techniques for the analysis of experiments with polarized targets. [1 to 2 GeV/c, polarization]

Description: An experiment was performed at the Bevatron to measure the polarization in the reaction ..pi../sup -/p ..-->.. ..pi../sup 0/n from a polarized target, at beam momenta between 1 and 2 GeV/c. Concentration is placed on the original aspects of our analysis, in particular: the geometrical reconstruction of the elastic events; the use of the high analyzing power of the reaction studied to probe the polarization of the target in magnitude and distribution; a study of the statistical estimation of the… more
Date: June 1, 1975
Creator: Barrelet, E.
Partner: UNT Libraries Government Documents Department
open access

Mechanical design aspects of a tandem mirror fusion reactor

Description: Two ''plugs'' of dense plasma at either end of a central solenoid cell form the basis of a new mirror fusion power plant concept. A central cell blanket design is presented. Modules on crawler tracks serviced by remote welding and handling machines of very simple design are important features resulting from linear axisymmetric geometry. Three blanket designs are considered and the best one presented in some detail. It has lithium as the breeder material, helium cooled. ''Plug'' magnet field str… more
Date: April 25, 1977
Creator: Neef, W. S. Jr.
Partner: UNT Libraries Government Documents Department
open access

Soft-group-manifold structure of supergravity, and the proof of unitarity

Description: The Soft Group Manifold (SGM) method of gauging a non-internal group is reviewed. Applications to three different versions of Extended Supergravity are presented. Then the geometric identification of the ghost fields and BRS equations, another aspect of the Group Manifold method, is summarized. The results are applied to Supergravity, and a completion of the proof of Unitarity of Sterman, Townsend, and Van Nieuwenhuizen is provided. 3 figures.
Date: January 1, 1979
Creator: Thierry-Mieg, J. & Ne'eman, Y.
Partner: UNT Libraries Government Documents Department
open access

Volume calculation and geometry checking in a Monte Carlo transport code. [For checking TARTNP input]

Description: An algorithm for finding cross-sectional areas of zones in a Monte Carlo transport code is given. The method is well suited to problems involving thin shells, and includes the capability of checking for gaps and overlaps. 1 table.
Date: July 1, 1977
Creator: Dubois, P. F.
Partner: UNT Libraries Government Documents Department
open access

Design for a superconducting niobium RFQ structure

Description: This paper reports a design for a niobium superconducting RFQ operating at 192 Mhz. The structure is of the rod and post type, novel in that each of four rods is supported by two posts oriented radially with respect to the beam axis. Although the geometry has four-fold rotation symmetry, the dipole-quadrupole mode splitting is large, giving good mechanical tolerances. The simplicity of the geometry enables designing for good mechanical stability while minimizing tooling cost for fabrication wit… more
Date: January 1, 1992
Creator: Shepard, K. W.; Kennedy, W. L. & Sagalovsky, L.
Partner: UNT Libraries Government Documents Department
open access

Research in theoretical physics. Progress report, September 1, 1976--March 31, 1977. [Summaries of research activities at John's Hopkins University]

Description: Gauge theories on coset spaces and dynamical mechanisms for generating internal symmetries were investigated. Gauge theories on cosets with respect to maximal subgroups of local internal symmetry groups contain reduced number of dynamically independent gauge fields. The transformation law of the gauge fields is nonlinear. Such theories can be interpreted in terms of a spontaneously broken internal symmetry. Internal symmetries may be generated in multidimensional geometric theory with vacuum so… more
Date: February 1, 1977
Creator: Domokos, G.
Partner: UNT Libraries Government Documents Department
open access

Advantages of magnification radiography

Description: Geometric arrangements and exposure conditions used in different magnification techniques are described and the following advantages of radiographic magnification technique are discussed: sharpness effect; noise effect; air gap effect; and visual effect. The magnification technique can be used in various diagnostic procedures as a means of improving the image quality of radiographs. (HLW)
Date: January 1, 1976
Creator: Doi, K.
Partner: UNT Libraries Government Documents Department
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