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PROPOSAL FOR A SILICON VERTEX TRACKER (VTX) FOR THE PHENIX EXPERIMENT.

Description: We propose the construction of a Silicon Vertex Tracker (VTX) for the PHENIX experiment at RHIC. The VTX will substantially enhance the physics capabilities of the PHENIX central arm spectrometers. Our prime motivation is to provide precision measurements of heavy-quark production (charm and beauty) in A+A, p(d)+A, and polarized p+p collisions. These are key measurements for the future RHIC program, both for the heavy ion program as it moves from the discovery phase towards detailed investigati… more
Date: March 30, 2004
Creator: AKIBA,Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

PROPOSAL FOR A SILICON VERTEX TRACKER (VTX) FOR THE PHENIX EXPERIMENT

Description: We propose the construction of a Silicon Vertex Tracker (VTX) for the PHENIX experiment at RHIC. The VTX will substantially enhance the physics capabilities of the PHENIX central arm spectrometers. Our prime motivation is to provide precision measurements of heavy-quark production (charm and beauty) in A+A, p(d)+A, and polarized p+p collisions. These are key measurements for the future RHIC program, both for the heavy ion program as it moves from the discovery phase towards detailed investigati… more
Date: October 1, 2004
Creator: AKIBA,Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Preliminary Controller Design for Drone Carried Directional Communication System

Description: In this thesis, we conduct a preliminary study on the controller design for directional antenna devices carried by drones. The goal of the control system is to ensure the best alignment between two directional antennas so as to enhance the performance of air-to-air communication between the drones. The control system at the current stage relies on the information received from GPS devices. The control system includes two loops: velocity loop and position loop to suppress wind disturbances and … more
Date: August 2015
Creator: AL-Emrani, Firas
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Evaluation of Ultra Clean Fuels from Natural Gas

Description: ConocoPhillips, in conjunction with Nexant Inc., Penn State University, and Cummins Engine Co., joined with the U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL) in a cooperative agreement to perform a comprehensive study of new ultra clean fuels (UCFs) produced from remote sources of natural gas. The project study consists of three primary tasks: an environmental Life Cycle Assessment (LCA), a Market Study, and a series of Engine Tests to evaluate the potential marke… more
Date: February 28, 2006
Creator: Abbott, Robert; Casey, Edward; Esen, Etop; Smith, Douglas; Burke, Bruce; Nguyen, Binh et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An Investigation of the Management Accounting Framework for Performance Evaluation in American Multinational Enterprises

Description: The development of adequate performance evaluation techniques for appraising foreign subsidiaries and their managers in an environment different from their domestic ones has been suggested as an area where management accounting should be extended. This study concerned the performance evaluation of foreign subsidiary managers with the following objectives: (1) to examine the relationships among environmental factors and foreign subsidiary performance, (2) to develop a multinational enterprise (M… more
Date: May 1982
Creator: Abdallah, Wagdy M. (Wagdy Moustafa)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

In-Situ Real Time Monitoring and Control of Mold Making and Filling Processes: Final Report

Description: This project presents a model for addressing several objectives envisioned by the metal casting industries through the integration of research and educational components. It provides an innovative approach to introduce technologies for real time characterization of sand molds, lost foam patterns and monitoring of the mold filling process. The technology developed will enable better control over the casting process. It is expected to reduce scrap and variance in the casting quality. A strong edu… more
Date: December 22, 2010
Creator: Abdelrahman, Mohamed & Currie, Kenneth
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Numerical Studies on Soliton Propagation in the Dielectric Media by the Nonlinear Lorentz Computational Model

Description: Soliton propagation in the dielectric media has been simulated by using the nonlinear Lorentz computational model, which was recently developed to study the propagation of electromagnetic waves in a linear and a nonlinear dielectric. The model is constructed by combining a microscopic model used in the semi-classical approximation for dielectric media and the particle model developed for the plasma simulations. The carrier wave frequency is retained in the simulation so that not only the envelo… more
Date: June 1, 1994
Creator: Abe, H. & Okuda, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Numerical studies on the electromagnetic properties of the nonlinear Lorentz Computational model for the dielectric media

Description: We study linear and nonlinear properties of a new computer simulation model developed to study the propagation of electromagnetic waves in a dielectric medium in the linear and nonlinear regimes. The model is constructed by combining a microscopic model used in the semi-classical approximation for the dielectric media and the particle model developed for the plasma simulations. It is shown that the model may be useful for studying linear and nonlinear wave propagation in the dielectric media.
Date: June 1, 1994
Creator: Abe, H. & Okuda, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

University-industry Alliances : A Study of Faculty Attitudes Toward the Effects of Alliances on the Governance and Operations of Institutions of Higher Education

Description: The central purpose of this study was to compare the attitudes of faculty in applied sciences to the attitudes of faculty in liberal arts and other selected fields to determine if they differ significantly from each other in their perceptions of the effects of university-industry alliances on campus governance and operations. Secondary purposes were (a) to appraise the debate on alliances and the effects of alliances on academic values and (b) to contribute to the literature concerning alliance… more
Date: August 1992
Creator: Abegunde, Olufemi
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Group-III Nitride Etch Selectivity in BCl(3)/Cl(2) ICP Plasmas

Description: Patterning the group-IH nitrides has been challenging due to their strong bond energies and relatively inert chemical nature as compared to other compound semiconductors. Plasma etch processes have been used almost exclusively to pattern these films. The use of high-density plasma etch systems, including inductively coupled plasmas (ICP), has resulted in relatively high etch rates (often greater than 1.0 pmhnin) with anisotropic profiles and smooth etch morphologies. However, the etch mechanism… more
Date: December 9, 1998
Creator: Abernathy, C.R.; Han, J.; Hong, J.; Lester, L.F.; Pearton, S.J.; Shul, R.J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Texas Folklore Society: Volume 3, 1971-2000

Description: Book containing information about the publishing history of the Texas Folklore Society, as well as anecdotes about the gatherings of the Society, information about past presidents of the Society, and Society by-laws. The index begins on page 219.
Date: 2000
Creator: Abernethy, Francis Edward
Item Type: Refine your search to only Book
Partner: UNT Press
open access

Depth Measurement of Moving Slurry at the Wet End of a Paper Machine

Description: The paper industry has long had a need to better understand and control its papermaking process upstream, specifically at the wet end in the forming section of a paper machine. A vision-based system is under development that addresses this need by automatically measuring and interpreting the pertinent paper web parameters at the wet end in real time. The wet-end characterization of the paper web by a vision system involves a four-dimensional measurement of the slurry in real time. These measure… more
Date: January 24, 1999
Creator: Abidi, B. R.; Goddard, J. S., Jr.; Hunt, M. A.; Sari-Sarraf, H. & Turner, J. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Surface Characterization of a Paper Web at the Wet End

Description: 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 syste… more
Date: June 23, 1999
Creator: Abidi, B.R.; Goddard, J.S. & Sari-Sarraf, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of a Cost Effective Wireless Sensor System for Indoor Air Quality Monitoring Applications

Description: Poor air quality can greatly affect the public health. Research studies indicate that indoor air can be more polluted than the outdoor air. An indoor air quality monitoring system will help to create an awareness of the quality of air inside which will eventually help in improving it. The objective of this research is to develop a low cost wireless sensor system for indoor air quality monitoring. The major cost reduction of the system is achieved by using low priced sensors. Interface circuits … more
Date: May 2014
Creator: Abraham, Sherin
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A Cost-Effective Wireless Sensor Network System for Indoor Air Quality Monitoring Applications

Description: This paper from the 9th International Conference on Future Networks and Communications, FNC 2014 conference proceedings presents a low-cost indoor air quality monitoring wireless sensor network system developed using Arduino, XBee modules, and micro gas sensors.
Date: August 15, 2014
Creator: Abraham, Sherin & Li, Xinrong
Item Type: Refine your search to only Paper
Partner: UNT College of Engineering
open access

Model Etch Profiles for Ion Energy Distribution Functions in an Inductively Coupled Plasma Reactor

Description: Rectangular trench profiles are modeled with analytic etch rates determined from measured ion distribution functions. The pattern transfer step for this plasma etch is for trilayer lithography. Argon and chlorine angular ion energy distribution functions measured by a spherical collector ring analyzer are fit to a sum of drifting Maxwellian velocity distribution functions with anisotropic temperatures. The fit of the model ion distribution functions by a simulated annealing optimization procedu… more
Date: December 14, 1998
Creator: Abraham-Shrauner, B.; Chen, W. & Woodworth, J.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

CPS: Medium: Integrating sensors, controls, and ecotoxicology with decoupled aquaponics using brackish groundwater and desalination concentrate for sustainable food production

Description: Data management plan for the grant, "CPS: Medium: Integrating sensors, controls, and ecotoxicology with decoupled aquaponics using brackish groundwater and desalination concentrate for sustainable food production." This project aims to develop a cyber-physical system (CPS) testbed of integrated sensors, controls, machine learning, and ecotoxicology tools to engineer sustainable food production systems based on aquaculture using brackish water. The testbed includes an automated recirculating aqu… more
Date: 2023-01-01/2025-12-31
Creator: Acevedo, Miguel F.
Item Type: Refine your search to only Text
Partner: UNT College of Engineering
open access

Microfluidic systems for electrochemical and biological studies

Description: Microfluidic devices with microelectrodes have the potential to enable studies of phenomena at size scales where behavior may be dominated by different mechanisms than at macroscales. Through our work developing microfluidic devices for dielectrophoretic separation and sensing of cells and particles, we have fabricated devices from which general or more specialized research devices may be derived. Fluid channels from 80 {micro}m wide X 20 {micro}m deep to 1 mm wide to 200 {micro}m deep have bee… more
Date: May 1998
Creator: Ackler, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Healing of lithographically introduced flaws in glass and glass containing ceramics

Description: The morphological evolution of cylindrical pores or ``channels`` and crack-like cavities in glass and glass-containing ceramics at elevated temperatures was studied. The systems studied were: Coming 7056 alkali borosilicate glass, soda-lime glass (microscope slides), a commercially available 96% Al{sub 2}O{sub 3}with {approx}5--10% intergranular glass, 96% Al{sub 2}O{sub 3} bonded to sapphire, and a model sapphire/glass/sapphire system fabricated by diffusion bonding etched and unetched pieces … more
Date: December 1, 1992
Creator: Ackler, H. D.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Healing of lithographically introduced flaws in glass and glass containing ceramics

Description: The morphological evolution of cylindrical pores or channels'' and crack-like cavities in glass and glass-containing ceramics at elevated temperatures was studied. The systems studied were: Coming 7056 alkali borosilicate glass, soda-lime glass (microscope slides), a commercially available 96% Al[sub 2]O[sub 3]with [approx]5--10% intergranular glass, 96% Al[sub 2]O[sub 3] bonded to sapphire, and a model sapphire/glass/sapphire system fabricated by diffusion bonding etched and unetched pieces of… more
Date: December 1, 1992
Creator: Ackler, H. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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