The Cockrell School of Engineering at The University of Texas at Austin is a top ranked epicenter of engineering education, and knowledge creation and distribution. Comprised of renowned educators, researchers and thought leaders, the Cockrell School addresses the grand challenges of the world, drives economic progress and improves quality of life.

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  • The Development and Evaluation of the Global Gravity Model GGM05 

    Ries, John; Bettadpur, Srinivas; Eanes, Richard; Kang, Zhigui; Ko, Ung-dai; McCullough, Christopher; Nagel, Peter; Pie, Nadege; Poole, Steve; Richter, Thomas; Save, Himanshu; Tapley, Byron (2016-05)
    The GGM05 model suite consists of three mean Earth gravity field models: 1) GGM05S based only on GRACE data, 2) GGM05G based on the combination of GRACE and GOCE, and 3) GGM05C based on the combination of GGM05G and surface ...
  • Electrical and Thermal System Considerations for MVDC Superconducting Distribution on Navy Ships 

    Hebner, R.E.; Gattozzi, A.L.; Strank, S.M.; Pish, S.P.; Herbst, J.D. (2017-06-15)
    The interest in using a superconducting (SC) distribution grid on a ship designed with a medium voltage dc (MVDC) system is a natural one, because superconductors (SCs) perform at their best under dc power. The potential ...
  • Solid-State Fault Current Limiting for DC Distribution Protection 

    Qi, L.; Pan, J.; Huang, X.; Feng, X. (2017-06-15)
    This paper discusses solid-state fault current limiting technologies. Both solid-state fault current limiters and converters can quickly limit DC fault currents and permit other protective devices to perform appropriate ...
  • Experimental Test bed to De-Risk the Navy Advanced Development Model 

    Strank, S; Feng, X; Gattozzi, A; Wardell, D; Pish, S; Herbst, J; Hebner, R. (2017-06-15)
    This paper presents a reduced scale demonstration test-bed at the University of Texas’ Center for Electromechanics (UT-CEM) which is well equipped to support the development and assessment of the anticipated Navy Advanced ...
  • Power Converter Design Options for the 12kVdc Bus System 

    Gattozzi, A.L.; Strank, S.M.; Pish, S.P.; Hebner, R.E.; Engelkemeir, F.D. (2017-06-15)
    The US Navy’s recent reduction of the dc bus voltage for the new surface combatant, from the original 20 kV to the new target of 12 kV, opens up the design space to a broader range of options than was possible to date. ...
  • Higher frequency performance of stress-grading systems for HV large rotating machines 

    Hebner, R. (Conference on Electrical Insulation and Dielectric Phenomena, 2006)
  • Sensitivity Analysis of Flexible-Pavement Response and the AASHTO Design Guide to Properties of Unbound Layers. Summary 

    International Center for Aggregates Research (International Center for Aggregates Research, 2005)
    "Unbound granular materials generally compose the base and subbase layers in road pavements. The granular materials distribute the load through aggregate contacts to a level sustainable by the subgrade. Pavement design and ...
  • LASS Incorporates the Third Dimension in Order to Improve the Accuracy of Rapid-Gradation Technology 

    International Center for Aggregates Research (International Center for Aggregates Research, 2004)
    "Sophisticated asphalt designs, such as the Superpave specification, specify aggregate shape parameters like flatness and elongation ratios as an additional design variable. Conventional sieve analysis has drawbacks such ...
  • Structural Characteristics of Unbound Aggregate Bases for Mechanistic Design 

    International Center for Aggregates Research (International Center for Aggregates Research, 2001)
    The next AASHTO Guide for the Design of Pavement Structures will make extensive use of mechanistic-empirical design principles, and may result in pavement designs with different layer thicknesses than are currently common. ...
  • Increased Single-Lift Thicknesses For Unbound Aggregate Base Courses 

    International Center for Aggregates Research (International Center for Aggregates Research, 1998)
    "State departments of transportation (DOTs) have used aggregate base courses for many years as an integral structural component of pavements. Specifications prescribe requirements for placement and compaction of aggregate ...
  • Implication of Aggregates in the Frictional Performance of Seal Coat Overlays 

    International Center for Aggregates Research (International Center for Aggregates Research, 1988)
    To investigate the effect of aggregate type on pavement friction, researchers used Texas as a test model and constructed 59 seal coat test sections 1,000 feet (304 m) long in the four climatic regions of the state. The ...
  • From 12 Months to 3 Months : ICAR Study Yields New Test for Alkali-Silica Reaction that Reduces Time Required 

    International Center for Aggregates Research (International Center for Aggregates Research, 2002)
    ICAR PROJECT 301, "Alkali-Silica Reaction in Portland Cement Concrete," headed by Dr. David W. Fowler at The University of Texas at Austin, succeeded in modifying ASTM C 1293 to yield comparable findings in [three] weeks ...
  • Role of Aggregate Characteristics in Resistance to Load in SMA 

    Gatchalian, Dennis; Masad, Eyad; Chowdhury, Arif; Little, Dallas N. (International Center for Aggregates Research, 2006)
    Stone Matrix Asphalt (SMA) mixtures rely on stone-on-stone contacts among particles to resist applied forces, and permanent deformation. Aggregates in SMA should resist degradation (fracture and abrasion) under high stresses ...
  • Evaluation of Aggregate Characteristics Affecting Hot Mix Asphalt (HMA) Response 

    International Center for Aggregates Research (International Center for Aggregates Research, 2004)
    Aggregate shape properties are known to influence asphalt pavement performance. Angularity and texture govern the frictional properties and dilation of the aggregate structure. Aggregate texture plays a major role in ...
  • Evaluation of Superpave Aggregate Specifications 

    International Center for Aggregates Research (International Center for Aggregates Research, 2002)
    The purpose of this study was to evaluate the restricted zone effect using four different aggregates: crushed granite, crushed limestone, crushed river gravel, and a mixture of crushed river gravel as coarse aggregate with ...
  • Measuring Workability of High-Fines Concrete 

    International Center for Aggregates Research (International Center for Aggregates Research, 2005)
    "The workability of fresh concrete has traditionally been evaluated with the slump test, which provides an inadequate indication of this important parameter... The need for a better test method for workability is well ...
  • ICAR Project 102 Leads to High-Microfines Concrete 

    Ahn, Namshik; Fowler, David W. (International Center for Aggregates Research, 2001)
    "This study is the most comprehensive yet undertaken on microfines in concrete. Excellent cooperation was provided by industry; aggregates were furnished, an autogenous crusher was provided along with operating personnel ...
  • Status of By-Product Fines in the United States 

    International Center for Aggregates Research (University of Texas at Austin. International Center for Aggregates Research, 1997)
    "The objectives of the study were to identify the scope and diversity of marketing by-product fines; develop a technically and economically based protocol to identify potential uses; establish an advisory team to assist ...
  • Role of Aggregate Characteristics to Load in SMA 

    Gatchalian, Dennis; Masad, Eyad; Chowdhury, Arif; Little, Dallas N. (2006-08)
    Stone matrix asphalt (SMA) mixtures rely on stone-on-stone contacts among particles to resist applied forces and permanent deformation. Aggregates in SMA should resist degradation (fracture and abrasion) under high stresses ...
  • Rapid Test to Establish Grading of Unbound Aggregate Products: Automation of Aggregate Characterization Using Laser Profiling and Digital Image Analysis 

    Haas, Carl T. (Carl Thomas); Rauch, Alan F.; Kim, Hyoungkwan; Browne, Craig (2002-06)
    This final project report describes the development of a laser scanning device for measuring the gradation and other morphological characteristics of unbound construction aggregates. The device is called the LASS, for ...

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