Browsing by Subject "engineering"

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A comparison of mechanical properties from natural and process-induced interfaces in filament extrusion AM of polymer blends
(University of Texas at Austin, 2023) Chatham, Camden A.; Benza, Donald W.
Polymer blends are commonly tuned for specific applications to achieve desired properties otherwise inaccessible or prohibitively expensive to obtain via homopolymers. The interfacial characteristics of the polymer A-polymer B interface and resultant domain sizes govern key performance properties. Micro- and meso-scale morphology forms through the interplay of surface forces between the polymers and between each polymer and the surrounding atmosphere. Analogously, the layer-layer and road-road interfaces of material extrusion (MEX) additive manufacturing (AM) govern key performance properties of printed parts. This work explores the effect of layer height on the thermomechanical performance of polystyrene (PS)-polycarbonate (PC) blends. Filament is prepared from a 50/50 weight ratio of the two polymers and compared against dual-nozzle printing where every layer alternates between PS or PC homopolymer forming a part with an overall 50/50 polymer ratio. Typical indicators of polymer blend compatibility are also studied.
A Ground Water Manual for Small Communities
(University of Texas at Austin, 0000-00-00) Plauché, B.; Wojcik, W.
Analysis of Flow Additives in Laser-Based Powder Bed Fusion of Polymers: Implications for Flow Behavior, Processing, Temperature Profile, and Part Characteristics
(University of Texas at Austin, 2023) Cholewa, S.; Jacksch, A.; Drummer, D.
Powder bed fusion of polymers requires the use of flow additives to ensure adequate flowability of the feedstock material. However, information regarding flow additives and their load is limited, as is an understanding of their impact on processing conditions. This study investigates the flow behavior using static and dynamic measurements under process conditions, focusing on the influence of flow additives. Subsequently, processing studies are conducted using thermography to analyze the laser-material interaction. The characteristics of parts produced from Polypropylene and Polyamide 12 systems are also examined. The findings of this research enhance the understanding of the impact of flow additives on the processing conditions of laser-based powder bed fusion of polymers, potentially leading to optimized process parameters and improved part quality and mechanical properties.
Architectural Year Book, Volumes IV and V, 1916-1917, 1917-1918
(University of Texas at Austin, 1918-05-20) The University of Texas at Austin
The Austin Electic Railway System
(University of Texas at Austin, 1906-11-01) University of Texas at Austin
The Beautiful (Computer) Game: How Data Science Will Revolutionize the World's Most Popular Sport
(2021-12) Takvorian, Aristotelis
Data science is taking over sports, and soccer is no different. While having lagged behind other sports in the data revolution, soccer is beginning to put an emphasis on making data-driven decisions. This thesis addresses the ways in which professional soccer teams can begin to make use of advancing data acquisition technology to aid teams in preparation/strategy, in-game decisions, and scouting. First, the thesis provides an overview of how data science has been used in other sports. Next, the thesis investigates what professional soccer is currently doing and why they have lagged behind, followed by various proposals of data science models and techniques that could begin to be used in the game. Lastly, the thesis provides an example model of its own, used to predict player value based on personal performance statistics from the 2020-2021 season.
Blog Post - Girl Day
(Student Engineering Council, 2019-03-26) Runas, Allie
Blog Post - Redesigning the Vector Logo
(Student Engineering Council, 2019-04-08) Blackley, Nick
Blog Post - The Philosophy of an Internet Age Engineer
(Student Engineering Council, 2019-02-05) Marcotulli, Maurizio
Blog Post - Welcome to Vector Media
(Student Engineering Council, 2019-02-05) Marcotulli, Maurizio
Bulletin of the University of Texas, Number 304
(University of Texas at Austin, 1913-12-05) University of Texas at Austin
Center for Research in Water Resources, The University of Texas at Austin. Proceedings, Symposium on Water Production Engineering in Texas.
(University of Texas at Austin, 1966-05-03) Gage, Stephen J.; Kowarski, Lew; Strobel, Joseph J.; Holloway, Harold D.; McKee, Herbert; Wohlschlag, Donald; Fruh, E. Gus; Scanlan, J.A.; Stockton, John R.; Anderson, John E.; McIlhenny, W.F.; Walton, B.N.; Watt, John R.; Spiewak, Irving; Drew, H.R.
CFD Modeling and Simulation for the Waller Creek Tunnel/4th St. Lateral Junction
(City of Austin, 2008) ALDEN Research Laboratory, Inc.
CFD Modeling and Simulation for the Waller Creek Tunnel/8th St. Lateral Junction
(City of Austin, 2008) ALDEN Research Laboratory, Inc.
City of Austin Waller Creek Tunnel Travis County Commissioners Court Project Update
(City of Austin, 2015) City of Austin
Comparative Engineering Field Studies and Gas Resources of the Travis Peak Formation, East Texas Basin
(1986) Lin, Zsay-Shing; Finley, Robert J.
Data from eight fields producing from the Travis Peak Formation in the eastern East Texas Basin were used to define key engineering parameters for each field and to develop resource-reserve estimates. Field-average porosities range from 8 to 11 percent, and the median permeability for 191 wells is 0.088 md; field-average permeability ranges from 0.006 to 0.1 md. Gas productivity generally increases from south to north across the area studied with changes in the reservoir drive mechanism. Gas in place in the Travis Peak of the East Texas Basin is estimated to be 19.5 Tcf, assuming 12 percent of the area of the basin is ultimately productive.
Coordination of Geological and Engineering Research in Support of Gulf Coast Co-Production Program
(1985) Finley, Robert J.; Morton, Robert A.
The objective of this investigation was to evaluate the mechanism of secondary gas recovery by co-production in a slightly geopressured watered-out reservoir (Hitchcock N.E. field). This involved making a geological interpretation of the field and defining the reservoir parameters for reservoir engineering and modeling analysis. The excellent reservoir parameters of the Frio 1A1 sandstone are due to its distributary-mouthbar origin. Slight salinity reductions during production may be evidence of contemporaneous shale dewatering. Geochemical data indicate that the hydrocarbons had a deep source and were introduced by very saline brines. Numerical simulation of the Hitchcock N.E. field is being carried out by modeling the physical dimensions of the field, determining reservoir properties, and matching simulated pressures with historical measures. The historical and simulated measures match has not yet been achieved satisfactorily. Hence, no attempt was made to simulate the future performance of the Hitchcock N.E. field. Studies at the Delee No. 1 well show that there are large short-term variations in mud and mud filtrate resistivity while a well is being drilled. Boron concentrations in the Frio 1A1 sandstone are high and must be corrected for when interpreting some types of neutron logs.
Coordination of Geological and Engineering Research in Support of the Gulf Coast Co-Production Program
(1987) Tyler, N.; Light, M. P. R.; Ambrose, William A.
Complex and heterogeneous Hackberry reservoirs at Port Arthur field were deposited in a submarine canyon/fan setting. Conventional fieldwide hydrocarbon recovery efficiencies are low, but the potential for secondary gas recovery is high. Free gas remains trapped in uncontacted and untapped compartments at reservoir abandonment. The total fieldwide resource amounts to 13.9 Bcf. The probable and possible resource for a single infill well is 6.5 Bcf in four separate stringers. Three optimum brine-disposal sands and the best brine-disposal site were selected in Northeast Hitchcock field based on sand-body complexity, thickness, depth, and brine-disposal capacity. The equilibrium distribution of inorganic species in different combinations in the produced waters at surface and formation temperatures and pH was estimated from chemical analyses. SOLMNEQ computations suggest carbonate scaling may occur in surface equipment of Miocene disposal sandstones unless inhibitors are used. At Northeast Hitchcock field, well-winnowed sandstones of shallow-marine origin compose the major reservoir sands and act as preferential conduits for fluid migration. Dislodged, abundant authigenic kaolinite in these sands can plug pores during production, suggesting a maximum rate of production will need to be determined to avoid reservoir damage.
Coordination of Geological and Engineering Research in Support of the Gulf Coast Co-Production Program
(1989) Jirik, Lee A.; Ambrose, William A.; Kerr, D. R.; Light, M. P. R.
Shallow-marine sandstones in Northeast Hitchcock field having high porosities and permeabilities contain abundant authigenic kaolinite and have acted as preferential conduits for fluid migration. Authigenic clay creates fluid production problems because of its delicate structure. Dislodged clay will obstruct pore throats at high production rates. A maximum safe rate of fluid production will need to be determined for co-produced wells. Middle and lower Miocene barrier-island sands in Northeast Hitchcock field have the potential for receiving large volumes of co-produced brines. These sands have permeabilities in excess of 2,000 md, are internally homogeneous, and are laterally extensive in the field area. Detailed geologic analyses of two reservoirs in Seeligson field delineate heterogeneous, fluvial sandstones that probably contain isolated, undrained reservoir compartments. Zone 15 can be subdivided into at least four genetic sandstones, and Zone 18-C can be subdivided into two separate sandstones. Two new pool discoveries (Miocene) in Tom O'Connor field developed during growth-fault activity along the Vicksburg Fault Zone. Deposition of these sandstones, as part of an offshore system during initial parasequence deposition, was confined between the Vicksburg Fault Zone and the Tom O'Connor anticlinal crest.
Coordination of Geological and Engineering Research in Support of the Gulf Coast Co-Production Program - Final Report
(1988) Jirik, Lee A.; Ambrose, William A.; Kerr, D. R.; Light, M. P. R.
At Northeast Hitchcock field, the presence of the Skolithos assemblage and other structures has supported the interpretation of shallow-marine, tidal, distributary-mouth-bar, and channel depositional environments for most of the major reservoir sandstones. Several shaly horizons exhibit characteristics of interdistributary bays, and the Frio A is capped by a thin sequence of crevasse splays and washover sands that represent the initiation of the transgression that overlapped the Frio in Anahuac times. The high-energy depositional environment of reworked distributary-mouth-bar sandstones is the major control of the high porosity (around 30 percent) and permeability (around 1,000 millidarcies) in Frio A sandstones at Northeast Hitchcock field. Well-winnowed sandstones with high porosities and permeabilities contain abundant authigenic kaolinite and have served as preferential conduits for migrating acid waters and major fluid flow during co-production. Authigenic clay can create fluid production problems due to its delicate structure. Dislodged clay may obstruct pore throats at high production rates, necessitating the determination of a maximum safe rate of fluid production for co-produced wells. Middle and lower Miocene barrier island sands, buried at depths from 3,500 to 6,800 feet in Northeast Hitchcock field, have the potential to receive large volumes of co-produced brines from the Frio 1-A reservoir. These sands exhibit high permeabilities exceeding 2,000 millidarcies, are internally homogeneous, and are laterally extensive in the field area. The 6,150-foot sand (lower Miocene) was chosen for initial brine disposal in the H.D.S. Thompson No. 3 brine-disposal well based on these criteria. The 3,780-foot sand (middle Miocene) is recommended for future up-hole brine disposal in the H.D.S. Thompson No. 3 well because it is shallower, requiring less injection pressure and lower costs for brine disposal.