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 23 for “"Earthmoving"”.
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Human response to vibration from earthmoving machines.
The study was concerned with the low frequency vibration generated by wheeled earth moving machines and the consequent discomfort or fatigue risks for the drivers. For these machines the vertical, 'Z', axis was established as the direction of vibration propogation presenting greatest potential …
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Land Leveling Using Optimal Earthmoving Vehicle Routing
… approaches for land leveling, using optimal earthmoving vehicle routing. It addresses the Shortest Route Cut and Fill Problem (SRCFP) developed by Henderson, Vaughan, Wakefield and Jacobson [2000]. The SRCFP is a discrete optimization search problem, proven to be NP-hard. The SRCFP describes …
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Decision support system for earthmoving production estimates and equipment allocation
Construction planners require in-depth production estimates in an area of operations to optimally deploy equipment to prepare an area to its end state. With the increasing use of satellite imagery and voxelized LiDAR data, digital elevation models can be utilized for these estimates. However, an …
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Automated Vision-Based Tracking and Action Recognition of Earthmoving Construction Operations
… Colors (HOG+C) is used for 2D tracking of the earthmoving equipment. Once the equipment is detected, using a Direct Linear Transformation followed by a non-linear optimization, their positions are localized in 3D. In order to automatically analyze the performance of these operations, a new …
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Analysis Of Fatal And Nonfatal Accidents Involving Earthmoving Equipment Operators And On-Foot Workers
<p>In view of the limitations of univariate statistics for studying construction accidents, a multivariate approach was undertaken using crosstabulation analysis and logistic regression. </p> <p>Heavy construction equipment accidents related data for four type of equipment; backhoe, bulldozer, …
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Characterizing construction equipment activities in long video sequences of earthmoving operations via kinematic features
… analysis of construction equipment involved in earthmoving operations from highly varying long-sequence videos obtained from fixed cameras. A common approach to characterize equipment activities consists of detecting and tracking the equipment within the video volume, recognizing interest points …
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A Methodology for the Development of a Production Experience Database for Earthmoving Operations Using Automated Data Collection
… in the reliability of process design of earthmoving operations through automated field data acquisition. The segment of earthmoving operations addressed in this research constitutes the truck-loader operation. Therefore, the applicability of this research extends to other industries …
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Dynamic analyses of vehicles
… engineers use to predict the performance of earthmoving vehicle systems. The motivation for this work is shown by illustrating how these predictions are used in the design process to impact the financial well-being of the corporations that use them. The vehicle, the operator who controls the …
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Multivariable Robust Control of Nonlinear Systems With Application to an Electro -Hydraulic Powertrain
… An immediate application of these results to the earthmoving industry can reduce the cost of the control design cycle by formalizing the procedure. Simultaneously, a superior overall system will result by taking advantage of the multivariable structure.
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Detailed Haul Unit Performance Model
In order to make a profit in any earthmoving operation it is important to plan the operation, select the appropriate equipment and use the haul units efficiently in order to obtain the maximum productivity. Maximizing productivity is one of construction project management personnel's primary …
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Mitigation of blast effects on existing structures in austere environments
… large amounts of prefabricated concrete, heavy earthmoving equipment, or a significant effort in digging by hand. Clearly, all of these options are unsuitable for constructing a headquarters building that would be occupied for a short time or if the resources required were unavailable. Another …
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A Voxel-Based Approach to the Real-Time Simulation of Sands and Soils
… These interactions include excavation and earthmoving activities such as digging, pushing, lifting, dumping, and piling. Simulating the deformation of sand and soil- lled terrains in interactive computer graphics applications is challenging due to the ne-grained and highly dynamic nature of …
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A multi-echelon supply chain model for strategic inventory assessment through the deployment of kanbans
… simulation focuses on the parts data for three earthmoving products across eight echelons, but scales to n products across m echelons. Our results show that this approach predicted the optimal quantities of Kanbans for 95% of parts to a level of accuracy +/- 3 bins.
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The Use of Short-Interval GPS Data for Construction Operations Analysis
… to reduce data collected from a load and haul earthmoving operation to duration measures for the load, haul, dump, and return activities. The value of the developed system was demonstrated by investigating correlations between performance times in construction operations and by using field data …
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Development of an integrated tracking control algorithm and a test platform for autonomous excavation
… the key equipment in the construction field for earthmoving operations. In this study, an effective control strategy for excavation is introduced considering the position, contour, and force which are mutually associated factors for successful autonomous excavation. For position tracking of the …
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Scaled experimental study on excavation of lunar regolith with rakes/rippers and flat blade
… (ISRU), which starts with excavation and earthmoving. The present study focuses on loosening and moving of the lunar regolith by a ripper (or rake) and a wide blade with consideration of gravel content. After characterizing the lunar regolith and two of its simulants (JSC-1A and FJS-1), …
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New strategies to improve the management capacity of contractors for labor-based methods in road rehabilitation in Ghana
… equipment, costing $174 million annually for its earthmoving and construction activities. In 1986, the Government of Ghana, the World Bank, the International Labor Organization and the United Nations Development Program introduced labor-based road rehabilitation program in Ghana to help create …
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Estimating Sources of Valley Fever Pathogen Propagation in Southern Arizona: A Remote Sensing Approach
… construction, trenching, land stripping, and earthmoving) is a significant source of fugitive dust, which decreases air quality and may carry soil pathogens. Annual differencing of Landsat Thematic Mapper (TM) mid-infrared images is used to create change images, and thresholded change areas …
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Will Globalization Play in Peoria? Class, Race, and Nation in the Global Economy, 1948-2000
… labor unions in manufacturing industries such as earthmoving equipment, steel, auto, electronics, and textiles suffered steep and, thus far, irreversible losses in numbers and strength. The consequences have been deep and largely deleterious, with workers facing heightened competition for good …
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A construction-specific simulation-based framework for earthworks.
… can be connected to represent the layout of an earthmoving operation. A host of scenarios can thus be modeled with the minimum of time and effort. To ensure that only significant data and process logic was collected and included within the modules the experimental methodology factor analysis was …
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