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Habitat '67

Description: The fabricated concrete unit is ready for installation as one of 354 discrete units for the housing complex.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: 1967
Creator: Safdie, Moshe
Location Info:
Partner: UNT College of Visual Arts + Design

[Irish Castle]

Description: Photograph of a castle in Ireland. A stone wall is visible in the bottom foreground framed by trees. The castle is visible behind the wall.
Date: 1970
Creator: Gough, Ray
Partner: UNT College of Visual Arts + Design

[Stone Wall]

Description: Photograph of a stone wall in Cuernavaca, Mexico. The wall is visible on the right side of the frame. There is a door in the wall in the foreground. A stone water basin sits in the center foreground. A group of people is visible behind the basin. A car is parked next to the wall in the background.
Date: unknown
Creator: Gough, Ray
Partner: UNT College of Visual Arts + Design

An analysis of shock-wave cancellation and reflection for porous walls which obey an exponential mass-flow pressure-difference relation

Description: From Introduction: "In the present report a generalized exponential relation between pressure difference and normal flow is assumed which adequately describes porous-wall calibrations obtained experimentally at the Ames Laboratory and those presented in references 1 and 3."
Date: August 1954
Creator: Spiegel, Joseph M. & Tunnell, Phillips J.
Partner: UNT Libraries Government Documents Department

Plant Cell Walls: Basics of Structure, Chemistry, Accessibility and the Influence on Conversion - Aqueous Pretreatment of Plant Biomass for Biological and Chemical Conversion to Fuels and Chemicals

Description: This book is focused on the pretreatment of biomass, a necessary step for efficient conversion of the plant cell wall materials to fuels and other products. Pretreatment is required because it is difficult to access, separate, and release the monomeric sugars comprising the biopolymers within the biomass that can be further upgraded to products through chemical processes such as aqueous phase reforming or biological routes such as fermentation of the sugars to ethanol This resistance to degradation or difficulty to release the monomers (mostly sugars) is commonly referred to as recalcitrance. There are many methods to overcome plant recalcitrance, but the underlying cause of the recalcitrance lies in the complex combination of chemical and structural features of the plant cell walls.
Date: January 1, 2013
Creator: Davison, Brian H; Davis, Dr. Mark F.; Parks, Jerry M & Donohoe, Bryan
Partner: UNT Libraries Government Documents Department

[Old City Wall]

Description: Photograph of an old city wall in Ireland. A new wall in the foreground abuts the old wall. The old wall contains stonework ornamentation in the form a castle. There is an archway below the castle. More modern buildings are visible in the background through the arch.
Date: 1970
Creator: Gough, Ray
Partner: UNT College of Visual Arts + Design

[Stone Tower]

Description: Photograph of a stone tower in Ireland. The tower connects to a wall in the foreground. Weeds grow out of the top of the wall.
Date: 1970
Creator: Gough, Ray
Partner: UNT College of Visual Arts + Design

[Tower]

Description: Photograph of a tower in Ireland. In the foreground, water is visible surrounded by a stone wall. Beyond the stone wall, a stone tower is viisble. Trees and sky are visible in the background.
Date: 1970
Creator: Gough, Ray
Partner: UNT College of Visual Arts + Design

[Stone Wall]

Description: Photograph of a stone wall in Ireland. In the foreground, the wall is visible with a man on the top edge. The distant landscape is visible in the background.
Date: 1970
Creator: Gough, Ray
Partner: UNT College of Visual Arts + Design

Theoretical study of the tunnel-boundary lift interference due to slotted walls in the presence of the trailing-vortex system of a lifting model

Description: The equations presented in this report give the interference on the trailing-vortex system of a uniformly loaded finite-span wing in a circular tunnel containing partly open and partly closed walls, with special reference to symmetrical arrangements of the open and closed portions. Methods are given for extending the equations to include tunnel shapes other than circular. The rectangular tunnel is used to demonstrate these methods. The equations are also extended to nonuniformly loaded wings.
Date: January 1, 1955
Creator: Matthews, Clarence W.
Partner: UNT Libraries Government Documents Department

Theoretical study of the tunnel-boundary lift interference due to slotted walls in the presence of the trailing-vortex system of a lifting model

Description: Report presenting some equations that give the interference on the trailing-vortex system of a uniformly loaded finite-span wing in a circular tunnel containing partly open and partly closed walls, with special reference to symmetrical arrangements of the open and closed portions. Methods are given for extending the equations to include tunnel shapes other than circular.
Date: April 7, 1953
Creator: Matthews, Clarence W.
Partner: UNT Libraries Government Documents Department

Measurements of the effects of wall outflow and porosity on wave attenuation in a transonic wind tunnel with perforated walls

Description: Report presenting an investigation in the 5- by 5-inch transonic test section to determine the wave attenuating capabilities of a variety of perforated-wall configurations with and without the use of outflow. Test results indicated that reflected disturbances could be minimized by either varying the outflow through walls of constant porosity or by varying the wall porosity at constant low outflow.
Date: August 1958
Creator: Spiegel, Joseph M.; Tunnell, Phillips J. & Wilson, Warren S.
Partner: UNT Libraries Government Documents Department

NACA Transonic Wing-Tunnel Test Sections

Description: Memorandum presenting an approximate subsonic theory developed for the solid blockage interference in circular wind tunnels with walls slotted in the direction of flow. The theory indicated the possibility of obtaining zero blockage interference. Tests in a circular slotted tunnel based on the theory confirmed the theoretical predictions.
Date: October 25, 1948
Creator: Wright, Ray H. & Ward, Vernon G.
Partner: UNT Libraries Government Documents Department

An Ultrasonic System for Testing Isotope Heat Capsules

Description: Introduction: This report describes a program to develop a nondestructive (ultrasonic) tester and testing procedure to perform integrity tests on isotope heat source containers. The increased application of isotope heat sources has brought more attention to the engineering problems encountered during fabrication. One of the most important of these problems is insuring the isotope containment during the long unattended periods of use. To determine the integrity of the heat source container, a nondestructive testing procedure must be adopted to test each heat source after fabrication.
Date: March 1968
Creator: Dozer, B. E.
Partner: UNT Libraries Government Documents Department

Transcriptome Analysis of Arabidopsis Wild-Type and gl3-sst sim Trichomes Identifies Four Additional Genes Required for Trichome Development

Description: Article on a transcriptome analysis of Arabidopsis wild-type and gl3-sst sim trichomes identifying four additional genes required for trichome development.
Date: February 7, 2009
Creator: Marks, M. David; Wenger, Jonathan P.; Gilding, Edward; Jilk, Ross & Dixon, R. A.
Partner: UNT College of Arts and Sciences

Chemical composition of the peptidoglycan of Vitreoscilla stercoraria

Description: The peptidoglycan layer of Vitreoscilla stercoraria, ATCC 15218, was isolated from intact cells after treatment with sodium lauryl sulfate (SLS) and digestion with Pronase. Amino acid and amino sugar content was analyzed and 67% of the total present was made up of glutamic acid, alanine, diaminopimelic acid (DAP), and glusocamine in a molar ratio of 1:1.7:1:.0.7.
Date: August 1976
Creator: Levit, Gary
Partner: UNT Libraries

District Court Decision May Help Pave the Way for Trump Administration's Border Wall Plans

Description: This report discusses the U.S. District for the Southern District of California's recent decision in a case brought by the State of California against the Department of Homeland Security (DHS) regarding DHS's right to waive environmental and other administrative laws for border fence building projects. The court agreed with other court rulings on the issue and affirmed DHS's right to waive the laws.
Date: April 2, 2018
Creator: Vann, Adam
Partner: UNT Libraries Government Documents Department

NACA Transonic Wind-Tunnel Test Sections

Description: Report presents an approximate subsonic theory for the solid-blockage interference in circular wind tunnels with walls slotted in the direction of flow. This theory indicated the possibility of obtaining zero blockage interference. Tests in a circular slotted tunnel based on the theory confirmed the theoretical predictions.
Date: June 20, 1955
Creator: Wright, Ray H. & Ward, Vernon G.
Partner: UNT Libraries Government Documents Department

Behavior of Turbulent Boundary Layers on Curved Convex Walls

Description: The system of linear differential equations which indicated the approach of separation and the so-called "boundary-layer thickness" by Gruschwitz is extended in this report to include the case where the friction layer is subject to centrifugal forces. Evaluation of the data yields a strong functional dependence of the momentum change and wall drag on the boundary-layer thickness radius of curvature ratio for the wall. It is further shown that the transition from laminar to turbulent flow occurs at somewhat higher Reynolds Numbers at the convex wall than at the flat plate, due to the stabilizing effect of the centrifugal forces.
Date: April 1936
Creator: Schmidbauer, Hans
Partner: UNT Libraries Government Documents Department

On Transonic Flow Past a Wave-Shaped Wall

Description: "This report is an extension of a previous investigation (described in NACA rep. 1069) concerned with the solution of the nonlinear differential equation for transonic flow past a wavy wall. In the present work several new notions are introduced which permit the solution of the recursion formulas arising from the method of integration in series. In addition, a novel numerical tests of convergence, applied to the power series (in transonic similarity parameter) representing the local Mach number distribution at the boundary, indicates that smooth symmetrical potential flow past the wavy wall is no longer possible once the critical value of the stream Mach number has been exceeded" (p. 1).
Date: 1953
Creator: Kaplan, Carl
Partner: UNT Libraries Government Documents Department

Determining Cost-Effective Insulation Levels for Masonry and Wood-Frame Walls in New Single-Family Housing

Description: Report issued by the National Bureau of Standards over calculations for cost-effective insulation in single-family housing. Different calculations are made with regards to location, energy pricing, heating and cooling equipment available, and financial criteria. This report includes tables, illustrations, and photographs.
Date: August 1981
Creator: Petersen, Stephen R.; Barnes, Kimberly A. & Peavy, Bradley A.
Partner: UNT Libraries Government Documents Department