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A Study of Four-Mallet Grips Used in Playing Keyboard Percussion Instruments

Description: The purpose of this study was to evaluate the efficiency of three common grips used in four-mallet playing. The three grips were referred to as (a) the Musser grip, (b) the cross stick grip No. 1, and (c) the cross stick grip No. 2. A thorough description (including illustrations) was given for each grip. The evaluation of efficiency was made through research testing, which was conducted by the author. Forty individuals participated in the research testing. Four tests were conducted, and each test had ten participants. The individuals who participated in Tests I, II and III had no previous four-mallet experience. The individuals who participated in Test IV had previous four-mallet experience. The evaluation of the efficiency covered by the four tests was limited to (a) horizontal movement of the outside mallet(s), (b) horizontal movement of the inside mallet(s), and (c) horizontal movement of the hand (s). According to Tests I, II and III, the majority of beginning four-mallet players will find the cross stick grip No. 2 the easiest and most efficient (as far as the three movements which were tested are concerned) of the three grips. However, some individuals (a much smaller percentage) will prefer either the Musser grip or the cross stick grip No. 1. Many beginners will find the Musser grip extremely difficult. A very small percentage of beginning four-mallet students will have poor efficiency using cross stick grip No. 2. According to the results of Test IV, the efficiency of the Musser grip and the cross stick grip No. 2 improve at a faster rate than does the efficiency of the cross stick grip No. 1. The movements tested in this study are extremely important when playing with four mallets. However, this study was limited to the testing of three types of horizontal movements and, …
Date: August 1971
Creator: Glassock, Lynn
Partner: UNT Libraries
open access

Towards a Real-time Transient Classification Engine

Description: Temporal sampling does more than add another axis to the vector of observables. Instead, under the recognition that how objects change (and move) in time speaks directly to the physics underlying astronomical phenomena, next-generation wide-field synoptic surveys are poised to revolutionize our understanding of just about anything that goes bump in the night (which is just about everything at some level). Still, even the most ambitious surveys will require targeted spectroscopic follow-up to fill in the physical details of newly discovered transients. We are now building a new system intended to ingest and classify transient phenomena in near real-time from high-throughput imaging data streams. Described herein, the Transient Classification Project at Berkeley will be making use of classification techniques operating on"features" extracted from time series and contextual (static) information. We also highlight the need for a community adoption of a standard representation of astronomical time series data (i.e.,"VOTimeseries").
Date: February 22, 2008
Creator: Nugent, Peter E.; Bloom, Josh; Starr, Dan; Butler, Nat; Nugent, Peter; Rischard, M. et al.
Partner: UNT Libraries Government Documents Department
open access

Object Classification at the Nearby Supernova Factory

Description: We present the results of applying new object classification techniques to the supernova search of the Nearby Supernova Factory. In comparison to simple threshold cuts, more sophisticated methods such as boosted decision trees, random forests, and support vector machines provide dramatically better object discrimination: we reduced the number of nonsupernova candidates by a factor of 10 while increasing our supernova identification efficiency. Methods such as these will be crucial for maintaining a reasonable false positive rate in the automated transient alert pipelines of upcoming large optical surveys.
Date: December 21, 2007
Creator: Aragon, Cecilia R.; Bailey, Stephen; Aragon, Cecilia R.; Romano, Raquel; Thomas, Rollin C.; Weaver, B. A. et al.
Partner: UNT Libraries Government Documents Department
open access

Particle methods for simulation of subsurface multiphase fluid flow and biogeological processes

Description: A number of particle models that are suitable for simulating multiphase fluid flow and biogeological processes have been developed during the last few decades. Here we discuss three of them: a microscopic model - molecular dynamics; a mesoscopic model - dissipative particle dynamics; and a macroscopic model - smoothed particle hydrodynamics. Particle methods are robust and versatile, and it is relatively easy to add additional physical, chemical and biological processes into particle codes. However, the computational efficiency of particle methods is low relative to continuum methods. Multiscale particle methods and hybrid (particle–particle and particle–continuum) methods are needed to improve computational efficiency and make effective use of emerging computational capabilities. These new methods are under development.
Date: June 1, 2007
Creator: Meakin, Paul; Tartakovsky, Alexandre; Scheibe, Tim; Tartakovsky, Daniel; Redden, Georgr; Long, Philip E. et al.
Partner: UNT Libraries Government Documents Department
open access

Synthesis of Additive/Subtractive Procedures in a Drawing Experience

Description: To investigate this process I selected, as my creative project, the execution of a series of drawings. The objective of my creative project was the synthesis of additive/subtractive procedures of a drawing from its inception to its completion. A written journal was utilized to gather data pertinent to the investigation.
Date: December 1975
Creator: Williams, Mark
Partner: UNT Libraries
open access

Advanced Method for the Slide Trombone

Description: This advanced method for trombone is designed to meet the needs of the advanced high school trombonist and to prepare him for later participation in college, civic, and professional musical organizations of higher artistic standards. The student should not be satisfied with a thorough study of this method, but should seek improvement of his musical skill in other methods. Some very worthy studies for trombone have been written by La Fosse, Vobaron, Muller, Blume and others which should prove of much value to the student.
Date: August 1941
Creator: Seale, Tommy F. (Tommy Fred)
Partner: UNT Libraries

Improving Student Success: Researching How Students Use Electronic Library Resources

Description: This presentation presents a research study conducted at UNT. The UNT Libraries partnered with the Department of Anthropology at UNT to conduct ethnographic research of how UNT students use the electronic library services.
Date: 2010
Creator: Henry, Lisa; Antonovic, Annette; Buete, Sherri; Deardorff, Philip; DoCarmo, Tania; Gutierrez, Paula et al.
Partner: UNT College of Public Affairs and Community Service

Improving Student Success: Researching How Students Use Electronic Library Resources

Description: This presentation presents a research study conducted at UNT. The UNT Libraries partnered with the Department of Anthropology at UNT to conduct ethnographic research of how UNT students use the electronic library services.
Date: 2010
Creator: Henry, Lisa; Carlson, Steve; Cheatham, Dennis; Gorby, Megan; Leach, Matt; McAllister, Guenivere et al.
Partner: UNT College of Public Affairs and Community Service
open access

Automation of The Guiding Center Expansion

Description: We report on the use of the recently-developed Mathematica package VEST (Vector Einstein Summation Tools) to automatically derive the guiding center transformation. Our Mathematica code employs a recursive procedure to derive the transformation order-by-order. This procedure has several novel features. (1) It is designed to allow the user to easily explore the guiding center transformation's numerous nonunique forms or representations. (2) The procedure proceeds entirely in cartesian position and velocity coordinates, thereby producing manifestly gyrogauge invariant results; the commonly-used perpendicular unit vector fields e1, e2 are never even introduced. (3) It is easy to apply in the derivation of higher-order contributions to the guiding center transformation without fear of human error. Our code therefore stands as a useful tool for exploring subtle issues related to the physics of toroidal momentum conservation in tokamaks
Date: March 19, 2013
Creator: Burby, J. W.; Squire, J. & Qin, H.
Partner: UNT Libraries Government Documents Department
open access

Krylov subspace iterations for the calculation of K-Eigenvalues with sn transport codes

Description: We apply the Implicitly Restarted Arnoldi Method (IRAM), a Krylov subspace iterative method, to the calculation of k-eigenvalues for criticality problems. We show that the method can be implemented with only modest changes to existing power iteration schemes in an SN transport code. Numerical results on three dimensional unstructured tetrahedral meshes are shown. Although we only compare the IRAM to unaccelerated power iteration, the results indicate that the IRAM is a potentially efficient and powerful technique, especially for problems with dominance ratios approaching unity. Key Words: criticality eigenvalues, Implicitly Restarted Arnoldi Method (IRAM), deterministic transport methods
Date: January 1, 2002
Creator: Warsa, J. S. (James S.); Wareing, T. A. (Todd A.); Morel, J. E.; McGhee, J. M. (John M.) & Lehoucq, R. B. (Richard B.)
Partner: UNT Libraries Government Documents Department
open access

Statistical Techniques Applied to Aerial Radiometric Surveys (STAARS): Principal Components Analysis User's Manual

Description: From abstract: A Principal Components Analysis (PCA) program has been written to aid in the interpretation of multivariate aerial radiometric data collected by the U.S. Department of Energy (DOE) under the National Uranium Resource Evaluation (NURE) program. The variations exhibited by these data have been reduced and classified into a number of linear combinations by using the PCA program. The PCA program then generates histograms and outlier maps of the individual variates. Black and white plots can be made on a Calcomp plotter by the application of follow-up programs. All programs referred to in this guide were written for a DEC-10. From this analysis a geologist may begin to interpret the data structure. Insight into geological processes underlying the data may be obtained.
Date: January 1981
Creator: Koch, C. D.; Pirkle, F. L. & Schmidt, J. S.
Partner: UNT Libraries Government Documents Department
open access

Remarks on Some Engineering Methods and Their Limits

Description: The author makes the point that engineering practice and the mathematical modelling applied to engineering problems are different and that mathematical solutions that exist for engineering problems are incomprehensible to engineers. Two practical examples are presented to illustrate the point: parameter fitting error estimates and oscillator design. Some insights are offered to help translate between the languages of mathematics and engineering.
Date: June 16, 2011
Creator: Odyniec, M.
Partner: UNT Libraries Government Documents Department

Statistical Techniques Applied to Aerial Radiometric Surveys (STAARS): Principal Components Analysis User's Manual, Figure 8

Description: Clear film copy of figure 8 meant to be laid over figure 7 in a report regarding computer techniques for analyzing aerial radiometric surveys. The figure outlines numbered segments (explained on p. 35/36 of the report) that highlight specific geologic features in the area highlighted by the report.
Date: January 1981
Creator: Koch, C. D.; Pirkle, F. L. & Schmidt, J. S.
Location: None
Partner: UNT Libraries Government Documents Department
open access

Improvements to the image processing of HST NICMOS observationswith multiple readouts

Description: We report on improvements made to the standard NICMOS processing pipeline. The calculation of the uncertainties on the signal accumulation rate has been modified to include the statistical correlations between the consecutive readouts. In order to correct a problem with the existing cosmic ray rejection algorithm, we have developed and implemented a joint fit procedure, where the accumulating signal is fit as linear functions of time with the same rate both before and after the cosmic ray (CR) impact. We also accounted for inter-pixel correlations in the CR-affected region. The new processing is most relevant for deep observations of faint targets, and for PSF fitting, for which unbiased measurements of accurate error estimates are important. We show examples of these improvements for deep NIC2 images of high-redshift supernova from the Supernova Cosmology Project.
Date: July 1, 2005
Creator: Fadeyev, Vitaliy; Aldering, Gregory & Perlmutter, Saul
Partner: UNT Libraries Government Documents Department
open access

Low-noise Collision Operators for Particle-in-cell Simulations

Description: A new method to implement low-noise collision operators in particle-in-cell simulations is presented. The method is based on the fact that relevant collision operators can be included naturally in the Lagrangian formulation that exemplifies the particle-in-cell simulation method. Numerical simulations show that the momentum and energy conservation properties of the simulated plasma associated with the low-noise collision operator are improved as compared with standard collision algorithms based on random numbers.
Date: March 8, 2005
Creator: Lewandowski, J.L.V.
Partner: UNT Libraries Government Documents Department
open access

Novel Investigation of Iron Cross Sections via Spherical Shell Transmission Measurements and Particle Transport Calculations for Material Embrittlement Studies. Status report

Description: OAK-B135 Novel Investigation of Iron Cross Sections via Spherical Shell Transmission Measurements and Particle Transport Calculations for Material Embrittlement Studies. Status report
Date: September 27, 1999
Partner: UNT Libraries Government Documents Department
open access

Novel Investigation of Iron Cross Sections via Spherical Shell Transmission Measurements and Particle Transport Calculations for Material Embrittlement Studies. Quarterly Status Report 4

Description: OAK-B135 Novel Investigation of Iron Cross Sections via Spherical Shell Transmission Measurements and Particle Transport Calculations for Material Embrittlement Studies. Quarterly Status Report 4
Date: July 1, 2000
Partner: UNT Libraries Government Documents Department
open access

Novel Investigation of Iron Cross Sections via Spherical Shell Transmission Measurements and Particle Transport Calculations for Material Embrittlement Studies. Status Report

Description: OAK-B135 Novel Investigation of Iron Cross Sections via Spherical Shell Transmission Measurements and Particle Transport Calculations for Material Embrittlement Studies. Status Report
Date: January 1, 2000
Partner: UNT Libraries Government Documents Department
open access

Energy Conservation Tests of a Coupled Kinetic-kinetic Plasma-neutral Transport Code

Description: A Monte Carlo neutral transport routine, based on DEGAS2, has been coupled to the guiding center ion-electron-neutral neoclassical PIC code XGC0 to provide a realistic treatment of neutral atoms and molecules in the tokamak edge plasma. The DEGAS2 routine allows detailed atomic physics and plasma-material interaction processes to be incorporated into these simulations. The spatial pro le of the neutral particle source used in the DEGAS2 routine is determined from the uxes of XGC0 ions to the material surfaces. The kinetic-kinetic plasma-neutral transport capability is demonstrated with example pedestal fueling simulations.
Date: August 29, 2012
Creator: D.P. Stotler, C.S. Chang, S.H. Ku, J. Lang and G. Park
Partner: UNT Libraries Government Documents Department
open access

HTTF Core Stress Analysis

Description: In accordance with the need to determine whether cracking of the ceramic core disks which will be constructed and used in the High Temperature Test Facility (HTTF) for heatup and cooldown experiments, a set of calculation were performed using Abaqus to investigate the thermal stresses levels and likelihood for cracking. The calculations showed that using the material properties provided for the Greencast 94F ceramic, cracking is predicted to occur. However, this modeling does not predict the size or length of the actual cracks. It is quite likely that cracks will be narrow with rough walls which would impede the flow of coolant gases entering the cracks. Based on data recorded at Oregon State University using Greencast 94F samples that were heated and cooled at prescribed rates, it was concluded that the likelihood that the cracks would be detrimental to the experimental objectives is small.
Date: July 1, 2012
Creator: Hawkes, Brian D. & Schultz, Richard
Partner: UNT Libraries Government Documents Department
open access

A Comparison of Multivariate Normal and Elliptical Estimation Methods in Structural Equation Models

Description: In the present study, parameter estimates, standard errors and chi-square statistics were compared using normal and elliptical estimation methods given three research conditions: population data contamination (10%, 20%, and 30%), sample size (100, 400, and 1000), and kurtosis (kappa =1,10, 20).
Date: August 1999
Creator: Cheevatanarak, Suchittra
Partner: UNT Libraries
open access

Parameterization and measurements of helical magnetic fields

Description: Magnetic fields with helical symmetry can be parameterized using multipole coefficients (a{sub n}, b{sub n}). We present a parameterization that gives the familiar multipole coefficients (a{sub n}, b{sub n}) for straight magnets when the helical wavelength tends to infinity. To measure helical fields all methods used for straight magnets can be employed. We show how to convert the results of those measurements to obtain the desired helical multipole coefficients (a{sub n}, b{sub n}).
Date: July 1, 1997
Creator: Fischer, W. & Okamura, M.
Partner: UNT Libraries Government Documents Department
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