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798 Matching Results

Start Over Year 1993 Day 3rd

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(open access)

15th Street News (Midwest City, Okla.), Vol. 22, No. 13, Ed. 1 Friday, December 3, 1993

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.

Date: December 3, 1993

Creator: Saunders, Ricky

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

Altus Times (Altus, Okla.), Vol. 93, No. 227, Ed. 1 Friday, December 3, 1993

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.

Date: December 3, 1993

Creator: Lomenick, Rick

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

The Baytown Sun (Baytown, Tex.), Vol. 72, No. 29, Ed. 1 Friday, December 3, 1993

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

Date: December 3, 1993

Creator: Dobbs, Gary

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Brand (Abilene, Tex.), Vol. 81, No. 11, Ed. 1, Friday, December 3, 1993

Weekly student newspaper from Hardin-Simmons University in Abilene, Texas that includes local, state and campus news along with advertising.

Date: December 3, 1993

Creator: unknown

Object Type: Newspaper

System: The Portal to Texas History

(open access)

Chickasha Daily Express (Chickasha, Okla.), Vol. 102, No. 227, Ed. 1 Friday, December 3, 1993

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.

Date: December 3, 1993

Creator: Ferris, Terry

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

A comparison between direct spark ignition and prechamber ignition in an internal combustion engine

We simulated the flow field and flame propagation near top dead center in a generic large-bore internal combustion engine using the COYOTE computer program, which is based on the full Navier-Stokes equations for a fluid mixture. The combustion chamber is a right circular cylinder, and the main charge is uniformly premixed. The calculations are axisymmetric. The results illustrate the differences in flow patterns, flame propagation, and thermal NO production between ignition with a spark plug and with a small prechamber. In the spark-ignited case, the flame propagates away from the spark plug approximately as a segment of a spherical surface, just as expected. With the prechamber, a high speed jet of hot combustion products shoots into the main chamber, quickly producing a large flame sheet that spreads along the piston face. The prechamber run consumes all of the fuel in half the time required by the spark-ignited case. The two cases produce comparable amounts of thermal NO at the end of fuel combustion.

Date: December 3, 1993

Creator: Cloutman, L. D.

Object Type: Article

System: The UNT Digital Library

(open access)

Development and Evaluation of a Mn oxide adsorbent. Quarterly Progress Report: October--December, 1993

This progress report summarizes the work performed for the October-December 1993 period on the development and evaluation of a manganese oxide adsorbent. Most of efforts at the early stage of the project have been directed toward screening and selection of granular activated carbon (GAC) samples for use as the substrate in preparing the composite adsorbent and in the evaluation of the Mn oxide coating on the GAC surface. Tables are provided in this report which summarize GAC characteristics and which evaluate MnO{sub 2} coating efficiency for three replicates at three different extraction times. Plans for future experiments are briefly discussed.

Date: December 3, 1993

Creator: Anderson, Paul R.

Object Type: Report

System: The UNT Digital Library

(open access)

Effects of natural gas composition on ignition delay under diesel conditions

Effects of variations in natural gas composition on autoignition of natural gas under direct-injection (DI) diesel engine conditions were studied experimentally in a constant-volume combustion vessel and computationally using a chemical kinetic model. Four fuel blends were investigated: pure methane, a capacity weighted mean natural gas, a high ethane content natural gas, and a natural gas with added propane typical of peak shaving conditions. Experimentally measured ignition delays were longest for pure methane and became progressively shorter as ethane and propane concentrations increased. At conditions characteristic of a DI compression ignition natural gas engine at Top Dead Center (CR=23:1, p = 6.8 MPa, T = 1150K), measured ignition delays for the four fuels varied from 1.8 ms for the peak shaving and high ethane gases to 2.7 ms for pure methane. Numerically predicted variations in ignition delay as a function of natural gas composition agreed with these measurements.

Date: December 3, 1993

Creator: Naber, J. D.; Siebers, D. L.; Di Julio, S. S. & Westbrook, C. K.

Object Type: Article

System: The UNT Digital Library

(open access)

The Fourth Write (San Antonio, Tex.), Ed. 1 Friday, December 3, 1993

Student magazine from San Antonio College in San Antonio, Texas that includes works by journalism students along with advertising.

Date: December 3, 1993

Creator: San Antonio College

Object Type: Journal/Magazine/Newsletter

System: The Portal to Texas History

(open access)

Grandview Tribune (Grandview, Tex.), Vol. [99], No. 18, Ed. 1 Friday, December 3, 1993

Weekly newspaper from Grandview, Texas that includes local, state, and national news along with advertising.

Date: December 3, 1993

Creator: Magness, Jack, Jr.

Object Type: Newspaper

System: The Portal to Texas History

(open access)

Holidaily [1993]: Celebrations Around The Globe

Holiday supplement to the North Texas Daily, a daily student newspaper from the University of North Texas in Denton, Texas that includes local, state, national and campus news along with advertising.

Date: December 3, 1993

Creator: unknown

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Hopkins County Echo (Sulphur Springs, Tex.), Vol. 118, No. 49, Ed. 1 Friday, December 3, 1993

Weekly newspaper from Sulphur Springs, Texas that includes local, state, and national news along with advertising.

Date: December 3, 1993

Creator: Keys, Clarke & Lamb, Bill

Object Type: Newspaper

System: The Portal to Texas History

(open access)

Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 37, No. 16, Ed. 1 Friday, December 3, 1993

Weekly newspaper from Dell City, Texas that includes local, state, and national news along with advertising.

Date: December 3, 1993

Creator: Lynch, Mary Louise

Object Type: Newspaper

System: The Portal to Texas History

[James Bute Co. Warehouse]

Photograph of the James Bute Co. Warehouse in Houston, Texas.

Date: December 3, 1993

Creator: Texas Historical Commission

Object Type: Photograph

System: The Portal to Texas History

(open access)

[Letter from UNT Health Science Board of Regents, to Harold M. Williams, December 3, 1993]

Photocopy of a letter from the University of North Texas Health Science Center Board of Regents, chairman Jerry Farrington, vice chair E.L. Langley, W. David Bayless, Sr., R.L Crawford, Jr., Nancy Halbreich, Joe Kirven, Lucille G. Murchison, Don Rives and Topsy Wright to Harold M. Williams, President and Chief Executive Officer of the J. Paul Getty Trust. In regards to the Board of Regents wanting to let Williams known how much they appreciate the continued support of the Getty Trust towards the University's art education efforts through North Texas Institute for Educators on the Visual Arts program.

Date: December 3, 1993

Creator: Farrington, Jerry

Object Type: Letter

System: The UNT Digital Library

captions transcript

[Math Lecture, 1]

A video of a math teacher giving a lesson in front of a class in a classroom.

Date: December 3, 1993

Creator: University of North Texas. Center for Media Production.

Object Type: Video

System: The UNT Digital Library

(open access)

The Message, Volume 21, Number 6, December 1993

Semi-monthly newsletter of Congregation Beth Yeshurun in Houston, including news and events, upcoming services, member announcements, editorials, and other information of interest to congregants. This issue discusses Chanukah, including a home service and listing Beth Yeshurun's holiday events.

Date: December 3, 1993

Creator: Congregation Beth Yeshurun (Houston, Tex.)

Object Type: Journal/Magazine/Newsletter

System: The Portal to Texas History

(open access)

National Synchrotron Light Source operations policies, operational safety limits and policy upgrades. Revision

The National Synchrotron Light Source Safety Analysis Reports (1),(2),(3), BNL reports {number_sign}51584, {number_sign}52205 and {number_sign}52205 (addendum) describe the basic Environmental Safety and Health issues associated with the department`s operations. They include the operating envelope for the Storage Rings and also the rest of the facility. These documents contain the operational limits as perceived prior or during construction of the facility, much of which still are appropriate for current operations. However, as the machine has matured, the experimental program has grown in size, requiring more supervision in that area. Also, machine studies have either verified or modified our knowledge of beam loss modes and/or radiation loss patterns around the facility. This document is written to allow for these changes in procedure or standards resulting from their current mode of operation and shall be used in conjunction with the above reports. These changes have been reviewed by NSLS and BNL ES&H committees and approved by BNL management.

Date: December 3, 1993

Creator: Batchelor, K.

Object Type: Report

System: The UNT Digital Library

(open access)

A new comprehensive reaction mechanism for combustion of hydrocarbon fuels

A chemical kinetic model has been developed which describes pyrolysis, ignition and oxidation of many small hydrocarbon fuels over a wide range of experimental conditions. Fuels include carbon monoxide and hydrogen, methane and other alkane species up to n-butane, ethylene, propene, acetylene, and oxygenated species such as methanol, acetaldehyde and ethanol. Formation of some larger intermediate and product species including benzene, butadiene, large olefins, and cyclopentadiene has been treated in a semi-empirical manner. The reaction mechanism has been tested for conditions that do not involve transport and diffusional processes, including plug flow and stirred reactors, batch reactors and shock tubes. The present kinetic model and its validation differ from previous reaction mechanisms in two ways. First, in addition to conventional combustion data, experiments more commonly associated with chemical engineering problems such as oxidative coupling, oxidative pyrolysis and steam cracking are used to test the reaction mechanism, making it even more general than previous models. In addition, H atom abstraction and some other reaction rates, even for the smaller C{sub 2}, C{sub 3} and C{sub 4} species, are treated using approximations that facilitate future extensions to larger fuels in a convenient manner. Construction of the reaction mechanism and comparisons with experimental …

Date: December 3, 1993

Creator: Ranzi, E.; Sogaro, A.; Gaffuri, P.; Pennati, G.; Westbrook, C. K. & Pitz, W. J.

Object Type: Article

System: The UNT Digital Library