Global ETD Search
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Showing 1 to 14 of 14 for “"Condition Ratings"”.
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US yield forecasting using crop condition ratings
… cotton, winter wheat, and spring wheat, and crop condition ratings from 1986 to 2015. Three statistical models were tested, the first one including all categories of condition ratings, a trend, and no intercept. The second model addresses the issue of abandoned acres following the ideas of Fackler …
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A design performance driven learning framework for conceptual design knowledge : methodology development and applications
… contains more than 600,000 bridges. The physical condition ratings are used as proxies for design quality. In this data the relationships between physical condition ratings and bridge design elements are not well-known. The simultaneous equation model (SEM) technique is employed to model the …
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Machine learning-based analytics of structured and unstructured data for enhanced bridge deterioration prediction
… data (e.g., the NBI data which describe bridge conditions by condition ratings) from a single source – missing the opportunity of leveraging the wealth of unstructured textual inspection reports and the diverseness of the multi-source data for enhanced deterioration prediction. To capitalize on …
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The investigation of methods to assist decision-makers regarding bridge maintenance, rehabilitation, and restoration activities
… probabilistic, capable of predicting future condition ratings of the three main components of a bridge; wearing surface, superstructure, and substructure. The contribution to bridge deterioration by environment factors including freeze-thaw cycles, de-icing salts, and vehicular traffic, are …
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Improvement of the approaches to monitoring of reinforced concrete bridges subjected to chloride-induced reinforcement corrosion in bridge management systems
… reinforcing in concrete corrode when certain conditions (e.g., carbonation, chlorides, insufficient cover and moisture) are met. Even though RC bridges are built to provide a service over a specified period, their serviceability changes over time due to gradual deterioration. In the marine …
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Review of current asset maintenance in South African ports and recommendations for smart port maintenance
… Conflicting information regarding the asset condition of TNPA's infrastructure provides a need for objective asset condition assessments and ratings using international guidelines and standards. This qualitative research reviews the condition assessment guidelines prescribed in the TNPA Asset …
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Case study to document the condition of McConnell creek and the effect of redcedar revetments
… study was conducted to document overall creek condition at McConnell Creek in Wichita, Kansas and estimate the effect of streambank stabilization installations. The effects of the revetments were determined through two factors, first erosion/deposition rates on site, and second a bioassessment …
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Artificial Intelligence Driven Infrastructure Management and Maintenance Plan
… these increasing loads and harsh environmental conditions that Florida is subject to requires an enhanced infrastructure management program. Additionally, there is a need to eliminate inconsistencies in permit applications and derive a uniform maintenance practice for Florida’s infrastructure. …
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Effects of disparate information levels on bridge management and safety
… are made come from visual inspection based condition ratings. These visual inspections are used to evaluate the extent of deterioration present and assign a condition rating based on a predefined scale of damage, after which bridge managers trigger further assessment or intervention actions …
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Framework for Rating Roadway Assets at the Corridor Level
… but no method exists that can be used to compare ratings in different states. To successfully maintain the network of roads across the United States, a method to assess assets between states is necessary. Consistency between states in their data collection, rating calculation, and rating reporting …
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Human Inspection Variability in Infrastructure Asset Management: A Focus on HVAC Systems
… components, conducting assessments of their conditions, identifying maintenance needs, and determining necessary repairs. Despite the growing interest in advanced technologies and automated inspections, the use of human-in-the-loop procedures is still widely practiced. Humans are susceptible …
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Eating Frequency, Disease-Related Biomarkers and Appetite
… at either one occasion at 8:00 am ("low-EF" condition) or spread evenly over two smaller eating occasions at 8:00 am and 10:30 am ("high-EF" condition). Ratings of hunger, desire to eat, fullness, thirst, and nausea were made every 30 minutes using paper-and-pencil semi-anchored 100-mm Visual …
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Data Driven Bridge Deck Deterioration Modeling and Maintenance Intervention Scheduling
… spending required to address deteriorating conditions adequately.</p> <p>Traditional bridge deterioration models required by bridge management systems often suffer from deterministic assumptions, inspector subjectivity, and data encoding errors, which can lead to inconsistent or biased …
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An analysis of transportation asset damage and repair costs after inland flood events
… bridges. A series of National Bridge Inventory condition ratings are analyzed with the scour criticality rating and superstructure rating both being significant predictors in the probability of bridge damage. This paper is the first known effort aimed at identifying the type of damages …