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 1421 for “"deterioration"”.
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Growth and Deterioration
… surface of each piece are employed to emphasize deterioration. In opposition to the tearing and perforations, I also add concave lines to the surface creating a flowing moving force. The surface is both visually active and smooth, allowing the eye to roam and focus on specific areas. I'm also …
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Surface coating deterioration studies
This project is concerned with the deterioration of surface coatings as a result of weathering and exposure to a pollutant gas (in this case nitric oxide). Poly(vinyl chloride) (PVC) plastisol surface coatings have been exposed to natural and artificial weathering and a comparison of the effects of …
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Development of Enhanced Pavement Deterioration Curves
Modeling pavement deterioration and predicting the pavement performance is crucial for optimum pavement network management. Currently only a few models exist that incorporate the structural capacity of the pavements into deterioration modeling. This thesis develops pavement deterioration models …
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Case-based reasoning for modeling bridge deterioration
… bridges, is characterized by their growing deterioration rate. Increased traffic loads, severity of environmental conditions, and deferred maintenance decisions are the main reasons for this rapid deterioration. Transportation agencies have developed Bridge Management Systems (BMS's) to …
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Automated techniques for surface coating deterioration studies
This thesis describes the development of automated techniques for use in accelerated ageing studies involving polymer based surface coatings. These techniques were required in order that the effects of low concentrations of pollutant gases, specifically nitric oxide, on surface coatings could be …
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Deterioration and Cracking in Reinforced Concrete Bridges
… structures are subjected to several sources of deterioration that can cause a progressive reduction in performance. Among the existing infrastructure typologies, reinforced concrete half-joint bridges are particularly critical. This common structural configuration is characterised by a reduction …
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A prevention of significant deterioration case study
The PSD permitting of new sources has drawn increasing public and governmental opposition. Much of the opposition is due to heightened environmental awareness. The issues are further compounded by inherent obstacles resulting from the PSD regulations and guidelines. A chronological review of the …
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Investigation of deterioration models for stormwater pipe systems
… in terms of pipe collapses due to structural deterioration or pipe blockages due to hydraulic deterioration. The deterioration of service infrastructure was a concern in Australian in recent times, where stormwater drainage pipes in Australia were rated as ‘poor condition’. The information on …
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Deterioration of excavated rockslopes : mechanisms, morphology and assessment
… sedimentary rocks and the investigation of the deterioration of rock masses as observed on engineered and quarried rockslopes. The simulated weathering processes include freeze-thaw, wetting and drying, salt weathering and slaking. It is found that the rock properties of pore volume, saturation …
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Deterioration and Noise in Technologies of Audio Reproduction
No abstract supplied. This thesis also contains music files - please contact the author if you wish to access these files
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Hydraulic Mechanisms of Concrete-Tie Rail Seat Deterioration
Rail seat deterioration (RSD) is considered the most critical problem with concrete-tie performance on North American freight railroads. RSD is the deterioration of the concrete underneath the rail that results in problems such as wide gauge, insufficient rail cant, and loss of fastening toe load. …
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The deterioration of concrete by heterothrophic bacteria and fungi
… the majority of existing research into concrete deterioration has focused on the effect of sulphur or nitrogen bacteria, this study has investigated the effect of the lesser documented heterotrophic bacteria and fungi on concrete deterioration, and their possible use within a biodecontamination …
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An Optimal Maintenance Policy for a Markovian Deterioration System
Made available in DSpace on 2014-12-10T23:09:04Z (GMT). No. of bitstreams: 1 7500460.pdf: 2077049 bytes, checksum: 84cf6de18002497d33d0239e53b5819f (MD5) Previous issue date: 1974
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Early warning of patient deterioration in the inpatient setting
Early signs of patient deterioration have been documented in the medical literature. Recognition of such signs offers the possibility of treatment with sufficient lead time to prevent irreversible organ damage and death. Pediatric hospitals currently utilize simple, human evaluated rubrics called …
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Deterioration of rough rice as measured by carbon dioxide production
Call number: LD2668 .T4 1979 S94
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Data Driven Bridge Deck Deterioration Modeling and Maintenance Intervention Scheduling
… 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 assessments. These challenges are compounded by the …
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The waterproofing of concrete and deterioration of cement with age
Made available in DSpace on 2014-09-18T16:21:06Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) waterproofingofc00harr.pdf: 9397151 bytes, checksum: b9b366e72b3078ef7edae46418f274be (MD5) Previous issue date: 1917
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