59 Matching Results

Search Results

Advanced search parameters have been applied.

Experimental Investigation of Eccentricity Ratio, Friction, and Oil Flow of Short Journal Bearings

Description: An experimental investigation was conducted to obtain performance data on bearings of length-diameter ratios of 1, 1/2, and 1/4 for comparison with theoretical curves. A 1.375-inch-diameter bearing was tested at speeds up to 6000 rpm and with unit loads from 0 to 900 pounds per square inch. Experimental data for eccentricity ratio and friction followed single lines when plotted against a theoretically derived capacity number, which is equal to Sommerfeld number times the square of the length-diameter ratio.
Date: November 1952
Creator: DuBois, G. B. & Ocvirk, F. W.
Partner: UNT Libraries Government Documents Department

The History of the Arlington Citizen-Journal

Description: This study was conducted to detail the history of The Arlington Citizen-Journal newspaper and its editors and the effect of an active newspaper on the orderly growth of a town. The Arlington Citizen-Journal evolved from a merger of two Arlington weekly newspapers, The Arlington Journal and The Arlington Citizen, which for more than fifty years reported Arlington happenings. The study includes historical information about the city, its people, and its institutions, and direct quotations of both editorial comment and news reports of Arlington events and people. It was found that throughout the years of Arlington's rapid growth, The Citizen-Journal was a vital force behind its citizens.
Date: August 1977
Creator: Forehand, Phyllis Hargrave
Partner: UNT Libraries

Perceptions of Open Access

Description: Video of the panel session "Perceptions of Open Access," discussing perceptions of open access through an analysis of journal solicitation emails, a study of library science open access journals, and a discussion of the future of open access.
Date: May 20, 2016
Creator: Burggren, Warren W.; Baker, Sarah & Sandlin, Joslyn
Partner: UNT Libraries

Sustaining Open Access

Description: Video of the panel session "Sustaining Open Access" with presentations discussing open access publishing, specifically through the Open Access Publishing Cooperative Study, the Lethbridge Journal Incubator, and the Digital Monograph P+L tool to estimate full publishing costs.
Date: May 20, 2016
Creator: Stranack, Kevin; O'Donnell, Daniel Paul & Maron, Nancy
Partner: UNT Libraries

Henry Watterson, The Coincidental Redeemer

Description: The major conclusion of this thesis is that Henry Watterson, while representative of the Redeemer element, was the product of a Jacksonian, rather than a Whig, heritage which had an ideology quite similar to the Redeemer appeal. In determining his exact philosophy the study shows that the editor was quite different from his contemporaries in the New South in both the substance and integrity of his beliefs.
Date: August 1971
Creator: Zenick, Gerold
Partner: UNT Libraries

Sample Core Journal List Spreadsheet

Description: Spreadsheet document accompanying a poster for the 2014 Charleston Annual Library Conference. This spreadsheet is a sample of a core journal list for specialized or small academic libraries.
Date: October 1, 2014
Creator: Crawford, Laurel; Harker, Karen & Marshall, Derek
Partner: UNT Libraries

Relation of Journal Bearing Performance to Minimum Oil-Film Thickness

Description: Note presenting the minimum thickness of the oil film as used as a basic variable in performance curves of plain journal bearings under steady load. The load capacity and the predicted film thickness at the hook point of the friction curves are shown to correlate with the peak-to-valley values of surface roughness when misalignment is absent.
Date: April 1958
Creator: Ocvirk, F. W. & DuBois, G. B.
Partner: UNT Libraries Government Documents Department

Experimental Investigation of Misaligning Couples and Eccentricity at Ends of Misaligned Plain Bearings

Description: Note presenting an experimental investigation to study the behavior of full journal bearings under steady load when acted upon by a steady misaligning couple. Displacements of the ends of the journal axis relative to the bearing axis were measured with either an axial couple applied in the plane of the central load or a twisting couple in the plane normal to the central load. Results regarding the phenomena at zero central load, misaligned attitude, Sommerfeld number and capacity number, load ratio, and couple variable are provided.
Date: February 1955
Creator: DuBois, G. B.; Ocvirk, F. W. & Wehe, R. L.
Partner: UNT Libraries Government Documents Department

Performance Characteristics of Journal Bearings With Forced-Feed Lubrication

Description: "Friction and heat-dissipation data are presented for use in determining the load-carrying capacity of 2- by 1.25-inch bearings with the following types of lining: copper-lead, lead-indium-coated silver, and lead-coated copper-lead. The tests were made in a four-bearing friction machine and covered operation with three clearances using three oils of different viscosity at three oil-inlet temperatures. Values are computed to indicate the safe loads at various speeds for bearings lined with each of the three types of material" (p. 1).
Date: August 1944
Creator: McKee, S. A.; White, H. S.; Bell, A. D. & Swindells, J. F.
Partner: UNT Libraries Government Documents Department

An Analysis of Educational Technology Publications: Who, What and Where in the Last 20 Years

Description: This exploratory and descriptive study examines research articles published in ten of the top journals in the broad area of educational technology during the last 20 years: 1) Educational Technology Research and Development (ETR&D); 2) Instructional Science; 3) Journal of the Learning Sciences; 4) TechTrends; 5) Educational Technology: The Magazine for Managers of Change in Education; 6) Journal of Educational Technology & Society; 7) Computers and Education; 8) British Journal of Educational Technology (BJET); 9) Journal of Educational Computing Research; and 10) Journal of Research on Technology in Education. To discover research trends in the articles published from 1995-2014, abstracts from all contributing articles published in those ten prominent journals were analyzed to extract a latent semantic space of broad research areas, top authors, and top-cited publications. Concepts that have emerged, grown, or diminished in the field were noted in order to identify the most dominant in the last two decades; and the most frequent contributors to each journal as well as those who contributed to more than one of the journals studied were identified.
Date: May 2016
Creator: Natividad Beltran Del Rio, Gloria Ofelia
Partner: UNT Libraries

High-resolution, high-transmission soft x-ray spectrometer for the study of biological samples

Description: We present a variable line-space grating spectrometer for soft s-rays that coverst the photon energy range between 130 and 650 eV. The optical design is based on the Hettrick-Underwood principle and tailored to synchrotron-based studies of radiation-sensitive biological samples. The spectrometer is able to record the entire spectral range in one shot, i.e., without any mechanical motion, at a resolving power of 1200 or better. Despite is slitless design, such a resolving power can be achieved for a source spot as large as (30 x 3000) micrometers squared, which is important for keeping beam damage effects in radiation-sensitive samples low. The high spectrometer efficiency allows recording of comprehensive two-dimensional resonant inelastic soft x-ray scatters (RIXS) maps with good statistics within several minutes. This is exemplarily demonstrated for a RIXS map of highly oriented pyrolytic graphite, which was taken with 10 min.
Date: June 11, 2009
Creator: Fuchs, Oliver; Weinhardt, L.; Blum, M.; Welgand, M.; Umbach, E.; Bar, M. et al.
Partner: UNT Libraries Government Documents Department

Glasstire: Visual Art News and Reviews

Description: This is the official website for Glasstire, an online magazine that covers visual art in Texas and Southern California. Founded in 2001, Glasstire was one of the earliest online art journals in the United States. It is a non-profit publication supported in part by grants from The Houston Endowment, The Brown Foundation, the the National Endowment for the Arts, the Greater Houston Community Foundation, the City of Houston through Houston Arts Alliance, and the Texas Commission for the Arts. It includes articles, news about local art events, videos, and classifieds.
Date: 2013
Creator: Glasstire
Partner: UNT Libraries Digital Projects Unit

Mapping the Future of Scholarly Publishing

Description: The National Science Communication Institute (nSCI) hosted a conference in late 2013 to explore the broad issue related to scholarly publishing. The Open Science Initiative (OSI) is a working group convened by the National Science Communication Institute (nSCI) in October 2014 to discuss the issues regarding improving open access for the betterment of science and to recommend possible solutions. The following document summarizes the wide range of issues, perspectives and recommendations from this group’s online conversation during November and December 2014 and January 2015. The 112 participants who signed up to participate in this conversation were drawn mostly from the academic, research, and library communities. Most of these 112 were not active in this conversation, but a healthy diversity of key perspectives was still represented. Individual participants may not agree with all of the viewpoints described herein, but participants agree that this document reflects the spirit and content of the conversation.
Date: January 2015
Creator: The Open Science Initiative (OSI) working group, National Science Communication Institute (nSCI)
Partner: UNT Libraries

Art Lies: A Contemporary Art Quarterly

Description: This is the official website for Art Lies, a print quarterly arts publication. Founded in Texas, Art Lies offers a critical examination of artistic practice, theory, and discourse on and about the contemporary arts. The first issue of Art Lies was published in 1994. The site includes news, information about current and past issues, the journal's editorial policies, advertising rates. Art Lies ceased operation in 2011.
Date: 2011
Creator: Art Lies
Partner: UNT Libraries Digital Projects Unit


Description: This paper describes the mathematical modeling and initial testing of an oil-hydrostatic bearing that derives compensation from both a central radial slit where fluid enters and stepped clearances near each end. Bearings using either a radial slit or stepped clearances for compensation were well studied over forty years ago by Donaldson. These bearings have smooth bores uninterrupted with multiple recesses around the circumference. The present slit-step bearing achieves the best of both types with somewhat higher hydrostatic stiffness than the slit bearing and fluid shear drag lower than the step bearing. This is apparent in TABLE 1, which compares calculated values of initial (i.e., centered) hydrostatic stiffness for each type. The slit-step bearing is one of several types being studied at Lawrence Livermore National Laboratory for possible use on the Precision Optical Grinder and Lathe (POGAL).
Date: July 28, 2006
Creator: Hale, L C; Donaldson, R R; Castro, C; Chung, C A & Hopkins, D J
Partner: UNT Libraries Government Documents Department

Practical Use of Rotordynamic Analysis to Correct a Vertical Long Shaft Pump's Whirl Problem

Description: The use of long shaft vertical pumps is common practice in the nuclear waste processing industry. Unfortunately, when such pumps employ plain cylindrical journal bearings, they tend to suffer from rotordynamic instability problems due to the inherent lightly-loaded condition that the vertical orientation places on the bearings. This paper describes a case study in which the authors utilized rotordynamic analysis and experimental vibration analysis to diagnose such a problem and designed replacement tilting-pad bearings to solve the problem.
Date: May 10, 2002
Creator: Leishear, R. A.
Partner: UNT Libraries Government Documents Department