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.
Results
Showing 1 to 20 of 54 for “"Life extension"”.
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Service life extension of reinforced concrete structures using hydrophobic impregnation
… as an inevitable phenomenon in the design life of reinforced concrete structures, due to concrete being an inherently cracked material. The presence of cracks within the cover zone changes the dynamics of transport mechanisms and corrosion development. Cracks provide preferential ingress …
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Development of innovative approaches for life extension of railway track systems
… postgraduate teaching. Railway Infrastructure Life Extension is a specialist area that has not been studied before in this depth and was initially related to specific problem solving. However, it is now clearly accepted that UK railway privatisation was a success and after passenger journeys …
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Life extension of structural components via an improved nondestructive testing methodology
… Bayesian updating techniques to forecast remnant life. Reliability block diagrams for structural disk and blade aircraft engine components were presented as examples of the methodology. Implementation of the proposed NDT methodology significantly increases the feasibility of a retirement-forcause …
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Shelf-life extension of home-made mahewu by adding Aloe vera powder
Department of Food Science and Technology
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Innovative treatments for shelf-life extension of whole and fresh-cut fruit
… range of technologies to enable extended shelf-life. Many factors can lead to loss of quality in fresh product, hence the common description of these products as ‘perishable’. As a consequence normal factors such as transpiration and respiration lead ultimately to water loss and senescence of …
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An investigation into novel bacteriocin producers isolated for shelf life extension of dairy products
This thesis investigates extension of the shelf life of dairy products and outlines the discovery and characterization of novel antimicrobials for application in food and health. The results demonstrate factors which affect the quality of yoghurt and extend the shelf life of pasteurised milk, and …
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The desire to upload: a theological analysis of transhumanist advocacy for life-extension and immortality
… through technology, including by extending lifespan in one of three ways: (1) a biological approach that focuses on reducing the effects of aging, (2) a cybernetic approach that focuses on replacing the body with mechanical equivalents, and (3) a digital approach that focuses on reproducing …
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Discrete sacrificial anodes and their use in service life extension of chloride contaminated reinforced concrete structures
… of discrete SACP systems in service life extension of chloride contaminated RC slabs has been investigated in this study. Similarly, the extent to which discrete sacrificial anodes can be used to extend the service life of corroding chloride contaminated RC structures has been …
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Multiaxial Fatigue Life Extension of Steel Elements Using Shape-Memory Alloy/Carbon Fiber-Reinforced Polymer (SMA/CFRP) Patch
… Experimental results suggested that the fatigue life extension provided by the SMA/CFRP patch is greater when grit blasting is adopted. Furthermore, they suggest that these benefits exceed those associated with a stop-drilled hole (SDH) method. Fatigue life extension provided by the SMA/CFRP …
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The use of Pulsed Energy (Flashbast) technology in the shelf life extension of selected marine and freshwater fish species stored in ice
… Technology (PET) to extend the shelf life of fresh fish fillets was studied. Unskinned fillets from fresh sea trout (Cynoscion regalis) and hybrid striped bass (Morone chrysops x ~ saxatilis) were treated with 7.45 Joules/cm² of PET, stored individually in sterile polyethylene bags, …
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Fracture and Fatigue of a Self -Healing Polymer Composite Material
… of the material are measured. A fatigue-life-extension-based protocol is established for characterizing self-healing under a cyclic loading. Retardation and arrest of the fatigue crack result from self-healing induced crack-tip shielding mechanisms and significantly increase fatigue life.
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Analyzing Attitude Correction of a Spacecraft Due to the Motion of a Robotic Arm Payload
… be attributed to satellite failure, or end-of-life protocols. With a continual increase in commercial satellite launches per year, decommissioned spacecraft act as more debris polluting the space environment. Not only can robotic arms assist with active orbital debris removal to be more …
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Corrosion Protection Service Life of Epoxy Coated Reinforcing Steel in Virginia Bridge Decks
The corrosion protection service life extension provided by epoxy-coated reinforcement (ECR) was determined by comparing ECR and bare bar from 10 bridge decks built between 1981 and 1995. The objective was to determine the corrosion protection service life time extension provided by ECR field …
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Concrete bridge prioritization system
… The analysis includes four parts, service life assessment, service life extension, cost calculation, and prioritization. The system combines these parts to optimize consideration of the technical parameters. A systems engineering approach to the investigation and design of the Concrete …
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Simulation methods for the development of modular strategic guidance systems
… architecture. For applications like the MK6 Life Extension program, where a modular system architecture is the primary design goal, this method of simulation-based design is inadequate. Sponsored by the System Engineering System Design and Analysis Group at the Draper Laboratory, this thesis …
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Maximizing nuclear power plant performance via mega-uprates and subsequent license renewal
… addresses aggressive power uprates and life extensions afforded by advances in the state of the art of nuclear technology. America's commercial nuclear power plants were initially licensed for 40 years. A successful license renewal program is being executed to extend operational …
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The use of fiber reinforced polymers in the rehabilitation of beams, slabs, and columns
… ductility while benefiting from a large service life extension. The engineer should evaluate all aspects of the project, including the structures location. The natural environment has the ability to degrade these FRP materials depending on the exposure to different elements, as well as, the …
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Application of Systems-Theoretic Analysis to Work Movement in Production Systems
In the aerospace industry, long product lifecycles, life extension programs, and highly specialized manufacturing capabilities combine to produce a challenge for Original Equipment Manufacturers (OEMs) in providing aftermarket support for fielded products. These factors drive the need for a work …
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Death and Value Reignition: Lucky in the Chance to Die
In this thesis I examine life-extension and embodied immortality and ask whether these are intrinsically problematic or undesirable. I examine the history of the concept of immortality and find that the usage of the term has nearly always referred to extended but mortal lifespans. I observe that …
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