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Princeton Airport Dedication

Description: This film contains an unidentified press event held outside a building labeled Princeton Aviation Elev 160 and Gulf Oil. A Piper N7968W aircraft is displayed to the crowd following the press conference.
Date: unknown
Partner: UNT Media Library

Loss of Innocence

Description: Loss of Innocence uses sculpture, two-dimensional imagery, and text to explore the moment when children lose their innocence or realize their mortality. In the introduction, I explain that there are many factors, such as age and personality, which determine how children will deal with traumatic events in their lives and the duration of time that must pass before they move past the event. Often, children will combine childhood fantasy with random facts to create their own satisfactory explanation of what has happened. In my problem in lieu of thesis, I discuss work that I created with these thoughts in mind. I explore how the sculpture, two-dimensional imagery, and text work together to convey the emotion of innocence lost.
Date: May 2002
Creator: Smith, Jennifer J.
Partner: UNT Libraries

Redox non-innoence permits catalytic nitrene carbonylation by (dadi)Ti=NAd (Ad = adamantyl)

Description: This article describes (dadi)Ti(X/L) species that manifest redox non-innocence (RNI), including a rare instance in which carbon monoxide does not affect redox activity at the metal, and does not bind, thus permitting its use as a substrate in catalysis.
Date: March 3, 2017
Creator: Heins, Spencer P.; Wolczanski, Peter T.; Cundari, Thomas R. & MacMillan, Samantha N.
Partner: UNT College of Arts and Sciences

Source Analysis of the Crandall Canyon, Utah, Mine Collapse

Description: Analysis of seismograms from a magnitude 3.9 seismic event on August 6, 2007 in central Utah reveals an anomalous radiation pattern that is contrary to that expected for a tectonic earthquake, and which is dominated by an implosive component. The results show the seismic event is best modeled as a shallow underground collapse. Interestingly, large transverse surface waves require a smaller additional non-collapse source component that represents either faulting in the rocks above the mine workings or deformation of the medium surrounding the mine.
Date: February 28, 2008
Creator: Dreger, D S; Ford, S R & Walter, W R
Partner: UNT Libraries Government Documents Department

National Gaming Day: Planning a successful gaming event

Description: This presentation discusses the American Library Association's (ALA's) National Gaming Day @ your library, a fairly new event created to promote the "educational, recreational, and social value of all types of games". The University of North Texas (UNT) Library has participated for two years and has organized their event to offer fun along with a focus on research and development opportunities available for people interested in all aspects of gaming. In this presentation, the authors detail the planning and organization of National Gaming Day at an academic library.
Date: January 2012
Creator: Robson, Diane & Ross, Bethany
Partner: UNT Libraries

Power system extreme event screening using graphpartitioning

Description: We propose a partitioning problem in a power system contextthat weighs the two objectives of minimizing cuts between partitions andmaximizing the power imbalance between partitions. We then pose theproblem in a purely graph theoretic sense. We offer an approximatesolution through relaxation of the integer problem and suggest refinementusing stochastic methods. Results are presented for the IEEE 30-bus and118-bus electric power systems.
Date: September 6, 2006
Creator: Lesieutre, Bernard C.; Roy, Sandip; Donde, Vaibhav & Pinar, Ali
Partner: UNT Libraries Government Documents Department

UNCERTAINTY IN PHASE ARRIVAL TIME PICKS FOR REGIONAL SEISMIC EVENTS: AN EXPERIMENTAL DESIGN

Description: The detection and timing of seismic arrivals play a critical role in the ability to locate seismic events, especially at low magnitude. Errors can occur with the determination of the timing of the arrivals, whether these errors are made by automated processing or by an analyst. One of the major obstacles encountered in properly estimating travel-time picking error is the lack of a clear and comprehensive discussion of all of the factors that influence phase picks. This report discusses possible factors that need to be modeled to properly study phase arrival time picking errors. We have developed a multivariate statistical model, experimental design, and analysis strategy that can be used in this study. We have embedded a general form of the International Data Center(IDC)/U.S. National Data Center (USNDC) phase pick measurement error model into our statistical model. We can use this statistical model to optimally calibrate a picking error model to regional data. A follow-on report will present the results of this analysis plan applied to an implementation of an experiment/data-gathering task.
Date: February 1, 2001
Creator: VELASCO, A. & AL, ET
Partner: UNT Libraries Government Documents Department

T864 (MiniMax): A search for disoriented chiral condensate at the Fermilab Collider

Description: A small test/experiment has been performed at the Fermilab Collider to measure charged particle and photon multiplicities in the forward direction, {eta} {approximately} 4.1. The primary goal is to search for disoriented chiral condensate (DCC). The experiment and analysis methods are described, and preliminary results of the DCC search are presented.
Date: October 1, 1996
Creator: Bjorken, J.D.
Partner: UNT Libraries Government Documents Department

Analysis of seismic events in and near Kuwait

Description: Seismic data for events in and around Kuwait were collected and analyzed. The authors estimated event moment, focal mechanism and depth by waveform modeling. Results showed that reliable seismic source parameters for events in and near Kuwait can be estimated from a single broadband three-component seismic station. This analysis will advance understanding of earthquake hazard in Kuwait.
Date: May 11, 1999
Creator: Harris, D B; Mayeda, K M; Rodgers, A J & Ruppert, S D
Partner: UNT Libraries Government Documents Department

Seismic Event Location Using Levenberg-Marquardt Least Squares Inversion

Description: The most widely used algorithm for estimating seismic event hypocenters and origin times is iterative linear least squares inversion. In this paper we review the mathematical basis of the algorithm and discuss the major assumptions made during its derivation. We go on to explore the utility of using Levenberg-Marquardt damping to improve the performance of the algorithm in cases where some of these assumptions are violated. We also describe how location parameter uncertainties are calculated. A technique to estimate an initial seismic event location is described in an appendix.
Date: October 2002
Creator: Ballard, Sanford
Partner: UNT Libraries Government Documents Department

Integrated Seismic Event Detection and Location by Advanced Array Processing

Description: The principal objective of this two-year study is to develop and test a new advanced, automatic approach to seismic detection/location using array processing. We address a strategy to obtain significantly improved precision in the location of low-magnitude events compared with current fully-automatic approaches, combined with a low false alarm rate. We have developed and evaluated a prototype automatic system which uses as a basis regional array processing with fixed, carefully calibrated, site-specific parameters in conjuction with improved automatic phase onset time estimation. We have in parallel developed tools for Matched Field Processing for optimized detection and source-region identification of seismic signals. This narrow-band procedure aims to mitigate some of the causes of difficulty encountered using the standard array processing system, specifically complicated source-time histories of seismic events and shortcomings in the plane-wave approximation for seismic phase arrivals at regional arrays.
Date: February 9, 2007
Creator: Kvaerna, T; Gibbons, S J; Ringdal, F & Harris, D B
Partner: UNT Libraries Government Documents Department

The DOE Model for Improving Seismic Event Locations Using Travel Time Corrections: Description and Demonstration

Description: The U.S. National Laboratories, under the auspices of the Department of Energy, have been tasked with improv- ing the capability of the United States National Data Center (USNDC) to monitor compliance with the Comprehen- sive Test Ban Trea~ (CTBT). One of the most important services which the USNDC must provide is to locate suspicious events, preferably as accurately as possible to help identify their origin and to insure the success of on-site inspections if they are deemed necessary. The seismic location algorithm used by the USNDC has the capability to generate accurate locations by applying geographically dependent travel time corrections, but to date, none of the means, proposed for generating and representing these corrections has proven to be entirely satisfactory. In this presentation, we detail the complete DOE model for how regional calibration travel time information gathered by the National Labs will be used to improve event locations and provide more realistic location error esti- mates. We begin with residual data and error estimates from ground truth events. Our model consists of three parts: data processing, data storage, and data retrieval. The former two are effectively one-time processes, executed in advance before the system is made operational. The last step is required every time an accurate event location is needed. Data processing involves applying non-stationary Bayesian kriging to the residwd data to densifi them, and iterating to find the optimal tessellation representation for the fast interpolation in the data retrieval task. Both the kriging and the iterative re-tessellation are slow, computationally-expensive processes but this is acceptable because they are performed off-line, before any events are to be located. In the data storage task, the densified data set is stored in a database and spatially indexed. Spatial indexing improves the access efficiency of the geographically-ori- ented data requests associated with event ...
Date: October 20, 1998
Creator: Hipp, J.R.; Moore, S.G.; Shepherd, E. & Young, C.J.
Partner: UNT Libraries Government Documents Department

[1960 homecoming program]

Description: Program for the 1960 North Texas State College homecoming held November 4-5. The program reads "Glory to the Green" on the cover and features a schedule of events inside.
Date: 1960
Partner: UNT Libraries Special Collections