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Start Over Access Open Access Day 23rd Language English

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Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
Inductively Coupled Plasma Etching in ICl- and IBr-Based Chemistries: Part II. InP, InSb, InGaP and InGaAs (open access)

Inductively Coupled Plasma Etching in ICl- and IBr-Based Chemistries: Part II. InP, InSb, InGaP and InGaAs

A parametric study of Inductively Coupled Plasma etching of InP, InSb, InGaP and InGaAs has been carried out in IC1/Ar and IBr/Ar chemistries. Etch rates in excess of 3.1 prrdmin for InP, 3.6 prnh-nin for InSb, 2.3 pm/min for InGaP and 2.2 ~rrdmin for InGaAs were obtained in IBr/Ar plasmas. The ICP etching of In-based materials showed a general tendency: the etch rates increased substantially with increasing the ICP source power and rf chuck power in both chemistries, while they decreased with increasing chamber pressure. The IBr/Ar chemistry typically showed higher etch rates than IC1/Ar, but the etched surface mophologies were fairly poor for both chemistries.
Date: November 23, 1998
Creator: Abernathy, C.R.; Cho, H.; Hahn, Y.B.; Hays, D.C.; Hobson, W.S.; Jung, K.B. et al.
Object Type: Article
System: The UNT Digital Library
Effect of Inert Gas Additive Species on Cl(2) High Density Plasma Etching of Compound Semiconductors: Part 1. GaAs and GaSb (open access)

Effect of Inert Gas Additive Species on Cl(2) High Density Plasma Etching of Compound Semiconductors: Part 1. GaAs and GaSb

The role of the inert gas additive (He, Ar, Xe) to C12 Inductively Coupled Plasmas for dry etching of GaAs and GaSb was examined through the effect on etch rate, surface roughness and near-surface stoichiometry. The etch rates for both materials go through a maximum with Clz 0/0 in each type of discharge (C12/'He, C12/Ar, C12/Xc), reflecting the need to have efficient ion-assisted resorption of the etch products. Etch yields initially increase strongly with source power as the chlorine neutral density increases, but decrease again at high powers as the etching becomes reactant-limited. The etched surfaces are generally smoother with Ax or Xe addition, and maintain their stoichiometry.
Date: December 23, 1998
Creator: Abernathy, C.R.; Cho, H.; Hahn, Y.B.; Hays, D.C.; Jung, K.B.; Pearton, S.J. et al.
Object Type: Article
System: The UNT Digital Library
Laboratory Studies of the Effects of Pressure and Dissolved Gas Supersaturation on Turbine-Passed Fish (open access)

Laboratory Studies of the Effects of Pressure and Dissolved Gas Supersaturation on Turbine-Passed Fish

The objective of this study was to examine the relative importance of pressure changes as a source of turbine-passage injury and mortality. Specific tests were designed to quantify the response of fish to rapid pressure changes typical of turbine passage, with and without the complication of the fish being acclimated to gas supersaturated water. We investigated the responses of rainbow trout (Oncorhynchus mykiss), chinook salmon (O. tshawytscha), and bluegill sunfish (Lepomis macrochirus) to these two stresses, both singly and in combination.
Date: March 23, 2001
Creator: Abernethy, Cary S & Amidan, Brett G
Object Type: Report
System: The UNT Digital Library
Laboratory Studies of the Effects of Pressure and Dissolved Gas Supersaturation on Turbine-Passed Fish (open access)

Laboratory Studies of the Effects of Pressure and Dissolved Gas Supersaturation on Turbine-Passed Fish

The objective of this study was to examine the relative importance of pressure changes as a source of turbine-passage injury and mortality. Specific tests were designed to quantify the response of fish to rapid pressure changes typical of turbine passage, with and without the complication of the fish being acclimated to gas supersaturated water. We investigated the responses of rainbow trout (Oncorhynchus mykiss), chinook salmon (O. tshawytscha), and bluegill sunfish (Lepomis macrochirus) to these two stresses, both singly and in combination.
Date: March 23, 2001
Creator: Abernethy, Cary S.; Amidan, Brett G. & Cada, G F.
Object Type: Report
System: The UNT Digital Library
Surface Characterization of a Paper Web at the Wet End (open access)

Surface Characterization of a Paper Web at the Wet End

We present an algorithm for the detection and representation of structures and non-uniformities on the surface of a paper web at the wet end (slurry). This image processing/analysis algorithm is developed as part of a complete on-line web characterization system. Images of the slurry, carried by a fast moving table, are obtained using a stroboscopic light and a CCD camera. The images have very poor contrast and contain noise from a variety of sources. Those sources include the acquisition system itself, the lighting, the vibrations of the moving table being imaged, and the scattering water from the same table's movement. After many steps of enhancement, conventional edge detection methods were still inconclusive and were discarded. The facet model algorithm, is applied to the images and is found successful in detecting the various topographic characteristics of the surface of the slurry. Pertinent topographic elements are retained and a filtered image is computed based on the general appearance and characteristics of the structures in question. Morphological operators are applied to detect and segment regions of interest. Those regions are then filtered according to their size, elongation, and orientation.Their bounding rectangles are computed and superimposed on the original image. Real time implementation of …
Date: June 23, 1999
Creator: Abidi, B.R.; Goddard, J.S. & Sari-Sarraf, H.
Object Type: Article
System: The UNT Digital Library
[Letter from Abilene Council for Retarded Children to Truett Latimer, January 23, 1957] (open access)

[Letter from Abilene Council for Retarded Children to Truett Latimer, January 23, 1957]

Letter signed by twenty-nine mebers of the Abilene Council for Retarded Children to Texas State Representative Truett Latimer discussing legislation to increase aid for intellectually disabled children in Texas.
Date: January 23, 1957
Creator: Abilene Council for Retarded Children
Object Type: Letter
System: The Portal to Texas History
[Letter from the Abilene Study Club to Truett Latimer, February 23, 1955] (open access)

[Letter from the Abilene Study Club to Truett Latimer, February 23, 1955]

Letter from Abilene Study Club to Truett Latimer as a petition to support the Driver Education Bill as it is vital to the safety of young drivers.
Date: February 23, 1955
Creator: Abilene Study Club
Object Type: Letter
System: The Portal to Texas History
Propuesta metodológica para el control de calidad de datos de precipitación (open access)

Propuesta metodológica para el control de calidad de datos de precipitación

Article discussing a methodological proposal for the quality control of precipitation data.
Date: October 23, 2007
Creator: Ablan, Magdiel; Andressen, Rigoberto; Vargas, Mary Pili & Acevedo, Miguel F.
Object Type: Article
System: The UNT Digital Library
Commodity multi-processor systems in the ATLAS level-2 trigger (open access)

Commodity multi-processor systems in the ATLAS level-2 trigger

Low cost SMP (Symmetric Multi-Processor) systems provide substantial CPU and I/O capacity. These features together with the ease of system integration make them an attractive and cost effective solution for a number of real-time applications in event selection. In ATLAS the authors consider them as intelligent input buffers (active ROB complex), as event flow supervisors or as powerful processing nodes. Measurements of the performance of one off-the-shelf commercial 4-processor PC with two PCI buses, equipped with commercial FPGA based data source cards (microEnable) and running commercial software are presented and mapped on such applications together with a long-term program of work. The SMP systems may be considered as an important building block in future data acquisition systems.
Date: May 23, 2000
Creator: Abolins, M.; Blair, R.; Bock, R.; Bogaerts, A.; Dawson, J.; Ermoline, Y. et al.
Object Type: Article
System: The UNT Digital Library
Determination of molar refractions and Abraham descriptors for tris(acetylacetonato)chromium(iii), tris(acetylacetonato)iron(iii) and tris(acetylacetonato)cobalt(iii) (open access)

Determination of molar refractions and Abraham descriptors for tris(acetylacetonato)chromium(iii), tris(acetylacetonato)iron(iii) and tris(acetylacetonato)cobalt(iii)

Article describes study in which researchers determined molar refractions of tris(acetylacetonato)chromium(III), tris(acetylacetonato)iron(III) and tris(acetylacetonato)cobalt(III).
Date: October 23, 2017
Creator: Abraham, M. H. (Michael H.); Acree, William E. (William Eugene); Fucaloro, Anthony F. & Zanella, Andrew W.
Object Type: Article
System: The UNT Digital Library
Air to Blood Distribution of Volatile Organic Compounds: A Linear Free Energy Analysis (open access)

Air to Blood Distribution of Volatile Organic Compounds: A Linear Free Energy Analysis

Article on air to blood distribution of volatile organic compounds and a linear free energy analysis.
Date: April 23, 2005
Creator: Abraham, M. H. (Michael H.); Ibrahim, Adam & Acree, William E. (William Eugene)
Object Type: Article
System: The UNT Digital Library
[Letter from Creighton W. Abrams to Omar Burleson, November 23, 1955] (open access)

[Letter from Creighton W. Abrams to Omar Burleson, November 23, 1955]

Letter from Creighton W. Abrams to Omar Burleson discussing the reassignment of Private William S. Beam.
Date: November 23, 1955
Creator: Abrams, Creighton W.
Object Type: Letter
System: The Portal to Texas History
The Oklahoma Daily (Norman, Okla.), Vol. 18, No. 120, Ed. 1 Thursday, February 23, 1933 (open access)

The Oklahoma Daily (Norman, Okla.), Vol. 18, No. 120, Ed. 1 Thursday, February 23, 1933

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes local and campus news along with advertising.
Date: February 23, 1933
Creator: Abrams, Samuel K.
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 18, No. 143, Ed. 1 Thursday, March 23, 1933 (open access)

The Oklahoma Daily (Norman, Okla.), Vol. 18, No. 143, Ed. 1 Thursday, March 23, 1933

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes local and campus news along with advertising.
Date: March 23, 1933
Creator: Abrams, Samuel K.
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 18, No. 165, Ed. 1 Sunday, April 23, 1933 (open access)

The Oklahoma Daily (Norman, Okla.), Vol. 18, No. 165, Ed. 1 Sunday, April 23, 1933

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes local and campus news along with advertising.
Date: April 23, 1933
Creator: Abrams, Samuel K.
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 18, No. 190, Ed. 1 Tuesday, May 23, 1933 (open access)

The Oklahoma Daily (Norman, Okla.), Vol. 18, No. 190, Ed. 1 Tuesday, May 23, 1933

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes local and campus news along with advertising.
Date: May 23, 1933
Creator: Abrams, Samuel K.
Object Type: Newspaper
System: The Gateway to Oklahoma History
Feedback damper system for quadrupole oscillations after transition at RHIC. (open access)

Feedback damper system for quadrupole oscillations after transition at RHIC.

The heavy ion beam at RHIC undergoes strong quadrupole oscillations just after it crosses transition, which leads to an increase in bunch length making rebucketing less effective. A feedback system was built to damp these quadrupole oscillations and in this paper the characteristics of the system and the results obtained are presented and discussed.
Date: June 23, 2008
Creator: Abreu, N.; Blaskiewicz, M.; Brennan, J. M. & Schultheiss, C.
Object Type: Article
System: The UNT Digital Library
The effect of head-on beam-beam compensation on the stochastic boundaries and particle diffusion in RHIC. (open access)

The effect of head-on beam-beam compensation on the stochastic boundaries and particle diffusion in RHIC.

To compensate the effects from the head-on beam-beam interactions in the polarized proton operation in the Relativistic Heavy Ion Collider (RHIC), an electron lens (elens) is proposed to collide head-on with the proton beam. We used an extended version of SixTrack for multiparticle beam-beam simulation in order to study the effect of the e-lens on the stochastic boundary and also on diffusion. The stochastic boundary was analyzed using Lyapunov exponents and the diffusion was characterized as the increase in the rms spread of the action. For both studies the simulations were performed with and without the e-lens and with full and partial compensation. Using the simulated values of the diffusion an attempt to calculate the emittance growth rate is presented.
Date: June 23, 2008
Creator: Abreu,N.; Beebe-Wang, J.; FischW; Luo, Y. & Robert-Demolaize, G.
Object Type: Article
System: The UNT Digital Library
Energy loss of coasting gold ions and deuterons in RHIC. (open access)

Energy loss of coasting gold ions and deuterons in RHIC.

The total energy loss of coasting gold ion beams was measured at RHIC at two energies, corresponding to a gamma of 75.2 and 107.4. We describe the experiment and observations and compare the measured total energy loss with expectations from ionization losses at the residual gas, the energy loss due to impedance and synchrotron radiation. We find that the measured energy losses are below what is expected from free space synchrotron radiation. We believe that this shows evidence for suppression of synchrotron radiation which is cut off at long wavelength by the presence of the conducting beam pipe.
Date: June 23, 2008
Creator: Abreu,N.; Blaskiewicz, M.; Brown, K.A.; Butler, J.J.; FischW; Harvey, M. et al.
Object Type: Article
System: The UNT Digital Library
Co-ordination of the International Network of Nuclear Structure and Decay Data Evaluators; Summary Report of an IAEA Technical Meeting (open access)

Co-ordination of the International Network of Nuclear Structure and Decay Data Evaluators; Summary Report of an IAEA Technical Meeting

The IAEA Nuclear Data Section convened the 18th meeting of the International Network of Nuclear Structure and Decay Data Evaluators at the IAEA Headquarters, Vienna, 23 to 27 March 2009. This meeting was attended by 22 scientists from 14 Member States, plus IAEA staff, concerned with the compilation, evaluation and dissemination of nuclear structure and decay data. A summary of the meeting, recommendations/conclusions, data centre reports, and various proposals considered, modified and agreed by the participants are contained within this document. The International Network of Nuclear Structure and Decay Data (NSDD) Evaluators holds biennial meetings under the auspices of the IAEA, and consists of evaluation groups and data service centres in several countries. This network has the objective of providing up-to-date nuclear structure and decay data for all known nuclides by evaluating all existing experimental data. Data resulting from this international evaluation collaboration is included in the Evaluated Nuclear Structure Data File (ENSDF) and published in the journals Nuclear Physics A and Nuclear Data Sheets (NDS).
Date: March 23, 2009
Creator: Abriola, D. & Tuli, J.
Object Type: Report
System: The UNT Digital Library
The Redbird (Beaumont, Tex.), Vol. 3, No. 24, Ed. 1 Friday, April 23, 1954 (open access)

The Redbird (Beaumont, Tex.), Vol. 3, No. 24, Ed. 1 Friday, April 23, 1954

Weekly newspaper from Lamar State College of Technology in Beaumont, Texas that includes local and campus news along with advertising.
Date: April 23, 1954
Creator: Abshier, Ann
Object Type: Newspaper
System: The Portal to Texas History
[Telegram From the Acarrette Family to the Kempners, November 23, 1963] (open access)

[Telegram From the Acarrette Family to the Kempners, November 23, 1963]

Telegram sent by the Acarrette family to Mr. and Mrs. Harris Kempner and their sons discussing their devastation at the death of President Kennedy and expressing their deep and affectionate sympathy.
Date: November 23, 1963, 3:10 p.m.
Creator: Acarrette
Object Type: Letter
System: The Portal to Texas History
University Press (Beaumont, Tex.), Vol. 79, No. 11, Ed. 1 Wednesday, October 23, 2002 (open access)

University Press (Beaumont, Tex.), Vol. 79, No. 11, Ed. 1 Wednesday, October 23, 2002

Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local, national, and campus news along with advertising.
Date: October 23, 2002
Creator: Achilles, Jenny
Object Type: Newspaper
System: The Portal to Texas History
International Law and the Preemptive Use of Force Against Iraq (open access)

International Law and the Preemptive Use of Force Against Iraq

None
Date: September 23, 2002
Creator: Ackerman, David M.
Object Type: Report
System: The UNT Digital Library