Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 103 for “"Field performance"”.
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Field Performance of Exposed Geosynthetic Composite Liner Systems
… from a GCL are investigated in a second field experiment at the Queen’s University Environmental Liner Test Site (QUELTS II). Wrinkles were quantified for black and high albedo white high-density polyethylene geomembranes (both smooth and textured). Relative to the black geomembrane, …
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Optimisation of insulator design for improved electric field performance
… insulators are essential for the better performance. Polymer insulators become popular due to various advantages offered such as light weight, ease of installation and lower cost. Despite numerous advantages offered, there are also some problems regarding the polymer insulators. One of …
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Techniques to evaluate the field performance of vertical drains
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1983.
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Balancing asphalt mixes containing recycled materials for optimum field performance
… should be carefully investigated to ensure that performance is not compromised in the pursuit of an economical and sustainable solution. This study investigates 17 mixes including five leveling binders (LB) and 12 surface mixes, which have been used by the Illinois Department of Transportation …
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Laboratory characterization and field performance of hot in-place recycled mixtures
… study is to characterize material properties and field performance of HIR treatments. Three field sites were evaluated as part of the study: Galesburg and Machesney in Illinois and Dyer in Indiana. Surface recycling followed by asphalt concrete (AC) overlay was used for all the three sites under …
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Field Performance of Epoxy-Coated Reinforcing Steel in Virginia Bridge Decks
The corrosion protection performance of epoxy-coated reinforcing steel (ECR) was evaluated in 18 concrete bridge decks in Virginia in 1997. The decks were 2 to 20 years old at the time of the investigation. The concrete bridge deck inspections included crack survey and cover depth determination in …
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Evaluation of field performance of fine-graded hot mix asphalt on Illinois' roadways
… order to compare both FG HMA and CG HMA. In all performance tests, FG HMA performed either equal or better than CG HMA. Among the concerns that transportation agencies have stated about CG HMA are its propensity to segregate, its difficulty to compact and achieve consistent high density, high …
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Evaluation of tactical decision aid programs for prediction of field performance of IR sensors
The diversity of infrared system performance prediction models currently used by different services conflict with the concept of joint operations' where all services must share the common resources to survive. in this respect this study presents an analysis and a comparison of two operational …
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Use of a Pre-Employment Multitasking Instrument and Neuropsychological Measures to Predict Field Performance in Police Officers
… Spearman correlations were used to compare performance on CritiCall to the NIH Toolbox Cognition Battery and standard neuropsychological test scores, and all scores were tested for predictive ability in relation to the Supervisor Survey via stepwise linear regression. Aspects of the …
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Comparison of laboratory protocols for yielding improved estimates of hearing protection in field performance for use in standards development
… for yielding improved estimates of HPD in-field performance. Two experiments were conducted. The first was a pilot study developed by an American National Standards Institute (ANSI) working group. In this experiment, two types of earplugs were tested, a user-molded, malleable foam plug and …
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Quantifying Field Variability Effects on Surface Performance and Athletes
Athletic field variability refers to differences in surface conditions within or between athletic fields, often influenced by several factors. In the U.S. transition zone, turfgrass stressors like spring dead spot (SDS; Ophiosphaerella spp.) and winter injury are common on bermudagrass (Cynodon …
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Response and Performance of Contingency Airfield Pavements Containing Stabilized Material Layers
… for the design and evaluation of Contingency Airfield Pavements (CAPs) containing stabilized material layers was validated. CAPs are inexpensive pavements built in peacetime and available immediately after an attack for limited aircraft operations. The mechanistic approach was validated by …
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Model development and validation of bituminous-based crack sealants
… two types of sealing treatment techniques. The performance of sealants was monitored after each winter for three years to determine a performance index (PI) consisting primarily of adhesive, cohesive, and overband wear. Field samples were collected from the sites to conduct laboratory testing …
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Reliability estimation using doubly censored field data
… that the available data set is obtained from field performance and is consequently censored on both the left and the right. The extreme lack of data makes estimation very difficult. Estimation equations are defined for both maximum-likelihood and moment based estimates. Simulation results …
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Performance Comparison of PG 64-22 versus PG 64-28 Asphalt in Hot Mix Asphalt Placed in Connecticut
<p><strong>Performance Comparison of PG 64-22 versus PG 64-28 Asphalt in Hot Mix Asphalt Placed in Connecticut</strong></p> <p><strong>Abstract</strong></p> <p>Eight test sections were constructed on Route 59 (Easton) and Route 341 (Kent) in Connecticut in 2006. Within each location there were two …
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Waterflooding Management and Identifying IOR Opportunities in a Mature Reservoir
… identified opportunities to improve production performance by utilizing secondary and tertiary recovery strategies in a mature oil reservoir. The identification techniques include analytical methods and simulation studies on field performance. Recommendations based on the field study and well …
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Evaluation of bonded concrete overlays on asphalt pavements
A field performance study of 19 bonded concrete overlays on asphalt pavements (BCOA) projects in 9 states were completed in this research study. BCOA pavements ranged in age from 7 to 26-years old and average thickness per project of 3.8 to 9.3 inches. The panel size varied from 4 ft x 4ft to 12 ft …
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Evaluation of ultrasound method for determining aggregate gradations in asphaltic concrete mixes
… the velocity measure can be used in a design or field quality control procedure as a correlation to a performance test to choose a coarse gradation that has non-rutting field performance properties. Tests were performed on actual production quality control samples of various gradation types to …
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