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 45 for “"Visual Inspections"”.
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Inspection of Flexible Fillers in Post-Tensioned Bridges
… (NDE) methods to employ in their biennial inspections. There are currently numerous NDE methods available to inspectors that have been used to identify defects in PT bridges that use CG, but the NDE methods identified in this study are specifically for PT bridges that use FFs. These methods …
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Evaluating Strategies for Wide Scale Replacement of Human Inspection with Machine Vision
… and production activities. Additionally, human visual inspections of medical devices are less reliable and effective than new technological inspections with machine and artificial intelligence vision systems. This research explores the efficiency of human visual inspections, the impact new …
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Autonomous Drone Assisted Aircraft Inspections
… for any aircraft manufacturer or operator. Visual inspections of the exterior of aircraft are critical to their safe operation, as defects such as corrosion, dents, lightning strikes, or missing parts can compromise the structural integrity of the whole aircraft. Currently, aircraft visual …
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Improvement of the approaches to monitoring of reinforced concrete bridges subjected to chloride-induced reinforcement corrosion in bridge management systems
… and repair. The system solely relies on visual inspection as a basis for the identification of deterioration processes and bridge condition rating. However, visual inspections do not allow detection of rebar corrosion until damage has occurred; and once the damage has occurred, it becomes …
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Investigating the Optimization of Terrestrial Laser Scanning Procedures for the Analysis of Concrete Bridge Pier Spalling
… There is a need to improve current subjective visual inspections of bridges and implement solutions that are more efficient and objective. Non-contact testing (NCT) technologies, such as terrestrial laser scanning (TLS) can be used to improve inspective efficiency and objectivity due to its …
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A deep learning-based approach towards automating visual reinforced concrete bridge inspections
Visual inspections are fundamental to the maintenance of RC bridge infrastructure. However, their highly subjective nature often compromises the accuracy of inspection results and ultimately leads to inaccurate prioritisation of repair and rehabilitation activities. Visual inspections are also …
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Design and dynamic modeling of an unmanned underwater vehicle for submerged surface inspection exploiting hydrodynamic ground effect
… to house necessary sensors needed for surface inspections. The UUV is designed - both in terms of its shape and propulsion - for gliding on submerged surfaces for volumetric inspection, in addition to motion in free stream motion for visual inspections. This thesis research explores the ground …
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Structural Assessment of Glued-Laminated Timber Columns Subjected to Real Fires
… on fire intensity and duration. Detailed visual inspections and axial compression testing of the MTDFTP columns indicated differences between actual charring rates and rates predicted by CSA O86 (2019), and Eurocode 5 (2004). Uneven charring and adhesive degradation were significant …
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In situ determination of strength and stiffness of structural lumber and composite products
… these inspection methods have consisted of visual inspections lacking scientific basis.;Non-destructive testing (NDT) methods were investigated by this research for the possibility of evaluating modulus of rupture and modulus of elasticity of built-in wooden members. Methods included stress …
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A catalog of new eclipsing binaries in the Kepler database
… and we explain the FFT selection algorithm and visual inspections which were used to find new candidates for binary systems. Finally, the classifications by which these candidates were sorted are explained in full, and the binary catalog itself is presented as Appendix A. In all, we found 173 …
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GPR data processing for reinforced concrete bridge decks
… the previous expensive and unreliable human visual inspections during the iterative migration process for the estimation of the velocity/dielectric permittivity distribution from GPR data. Second, F-K filtering with dip relaxation is proposed for interference removal that is important for …
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Green or Greenwashed? A case study of Urban Greenery in Sustainable Residential Development in Vancouver
… conditions observed through site surveys, visual inspections, and online aerial imagery and street-view platforms. The findings indicate that while the City of Vancouver has developed a robust policy framework promoting urban greenery , such as green roofs and urban agriculture, …
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Electrical Resistivity Tomography (ERT) and electromagnetic (CMD) assessment of Scottish reservoir embankments
… on site. These findings were confirmed by visual inspections. Results also revealed that the soil is highly conductive (low resistivity) so no cracking was observed as cracking and cavities are spotted by high resistivity. The upper layer of the embankments sometimes showed signs of …
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Inspection of Earthen Embankment Dams Using Time Lapse Electrical Resistivity Tomography
… to obtain a full assessment of the dam just by visual inspections alone. This is because many problems associated with dam failure occur internally, which makes it difficult to be observed by the dam inspectors. Examples of these flaws are piping and seepage (flow of water through or around dam …
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A Comparison and Evaluation of Different Dynamic Characterization Approaches for Bridges
… of bridge structures rely heavily on on-site visual inspections of each structure by specially trained engineers and technicians. It has been proved in the literature that this current method is subjective, time consuming and manpower intensive, all of which are not suited for the critical …
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Machine Learning for the Condition Assessment of Concrete Bridges
… inspection methods, which rely heavily on visual inspections and manual assessments, are time-consuming, subjective, and prone to human error. With the increasing number of aging bridges worldwide, there is a growing need for more efficient and accurate methods to assess bridge health. This …
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Concrete deterioration inspection system for extending the operating life of nuclear power plants
… structures. The majority of these modes are visually evident in their incipient stages. Currently available nondestructive testing methods were assessed to determine their applicability to detect modes which are not visually evident or to determine the extent of deterioration due to other …
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Relationships Among Team Cohesion and Performance, Anxiety, Retention, and Satisfaction
… anxiety, retention, and satisfaction. Visual inspections of the SNA networks revealed that the team with fewer friendship connections was more successful in terms of team performance. In addition, SNA efficacy was associated with lower levels of competitive somatic anxiety. The GEQ …
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Two-dimensional Wakes and Fluid-structure Interaction of Circular Cylinders in Cross-flow
… a flowing soap film system were determined using visual inspections of the wake patterns and calculations of the Strouhal frequencies. The dimensionless spacing was both increased and decreased quasi-statically. Hysteresis was observed in the flow patterns and Strouhal numbers. This study appears …
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A monitoring method for after-earthquake damage evaluation of buildings
… judgment basing mainly on in-field surveys and visual inspections. This necessarily implies additional inconvenience for residents and economic losses in the affected area, being often large the time required for conducting the surveys and being the judgment on the safe side in absence of …
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