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 44 for “"thermal damage"”.
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Optimal Control of Thermal Damage to Biological Materials
… protocol that will cause a desired amount of thermal damage within a region of tissue. The optimization algorithm is validated experimentally on an albumen tissue phantom. The transient temperature distribution within the region is simulated using a two-dimensional, finite-difference model of …
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Cycled Pulsing for Prostate Tumor to Mitigate Thermal Damage, While Conserving the Ablation Area
… of the tumor. Most focal therapy techniques are thermally mediated, which can cause damage to the surrounding tissue, vasculatures, and nerves. Irreversible electroporation is a minimally thermal technique which delivers electric pulses to create transient nanopores in cell membrane, ultimately …
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Simulating artificial lightning and composite damage
… metals, it is important to analyse the damage caused by a strike. Literature has shown lightning can be modelled as a plasma (an ionised gas) and has been idealised into four electric current waveforms of varying current and duration. Authors have almost exclusively modelled just one of …
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Surface integrity of laser cutting nitinol shape memory alloy
… size kerf on Nitinol, and the non-contact thermal process can also eliminate pressing issues inherent in mechanical cutting. Conventional dry laser cutting is a high-temperature process which may generate thermal damage such as heat affected zone (HAZ), recast layer, micro-cracks, and …
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Thermal performance of a Nam-Ju nanostructured copper oscillating heat pipe
… performance and decrease in size, more efficient thermal management systems are necessary to combat high heat fluxes. Copper heat pipes, and oscillating heat pipes are devices commonly used in the electronics industry to remove high heat fluxes, safeguarding sensitive electronic components from …
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Incorporating Magnetic Nanoparticle Aggregation Effects into Heat Generation and Temperature Profiles for Magnetic Hyperthermia Cancer Treatments
… tumors to other forms of treatment as well as damage the tumor. The work here aims to incorporate a broad range of relevant physics into a comprehensive model. NP aggregation is known to be a large source of uncertainty in these treatments, thus a framework has been developed that can …
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DEVELOPMENT OF A MULTIFUNCTIONAL COOKING APPLIANCE: EVALUATION OF FOOD QUALITY INDEXES AND COOKING FUNCTIONS.
… yielded similar moisture levels with reduced thermal damage, while low-temperature cooking (250°C) resulted in suboptimal crust development. WP2 focused on air-frying, both in dedicated appliances and in a prototype oven, evaluating the crispness of breaded foods (chicken nuggets) using a …
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Dynamic Chemical Shift Imaging For Image-Guided Thermal Therapy
… to provide temperature imaging for guidance in thermal therapies. The most common method of estimating temperature changes in the body using MR is by measuring the water proton resonant frequency (PRF) shift. Calculation of the complex phase difference (CPD) is the method of choice for measuring …
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Advancements in Irreversible Electroporation for the Treatment of Cancer
… have developed a system capable of achieving non-thermal irreversible electroporation without causing muscle contractions. This progress is the main focus of this dissertation. We describe the theoretical basis for how this new system utilizes alterations in pulse polarity and duration to induce …
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The Electrical Properties And Microstructure Of An Ion Beam Mixed Metal-Polymer System
… implantation and cracks in the metal layer. The thermal damage results in gas evolution during implantation. The resistivity is reduced over the resistivity of ion implanted polymers no metal layer. The DC conductivity increases with increasing temperature. The temperature coefficient of …
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New minimally-invasive laser treatment in orthopaedics on spinal deformations and bone tumours
… were investigated with regard to minimal thermal damage to collateral structures. The main part was the development of a completely new laser-induced operation technique for the minimally-invasive treatment of spinal deformities in young patients. The method is based on endoscopic laser …
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Development of high efficiency high speed permanent magnet generator
… a substantial amount of heat. This makes the thermal management of these machines difficult and complicated, which leads to demagnetization and the reduction of the output power and shortens the lifetime of the critical components such as the bearings. This thesis presents the design and …
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Engineered Platforms for the Development of Electroporation-based Tumor Therapies
… the applied voltage to an extent that induces thermal damage or muscle contractions in patients. A method to increase ablation size safely is needed. To make this advancement and to advance other cancer treatments as well, better in vitro tumor models are needed. Heterogeneity not only makes …
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The ability for investigators to visible identify and interpret damage to electrical conductors
… investigations is to correctly interpret the damage in order to identify the cause responsible for the fire and potentially help prevent similar incidents in the future. According to current guidelines of fire scene processing, fire investigators can implement the procedure of arc mapping as a …
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Ablation of Steel by Microsecond Pulse Trains
… to obtain the desired part with minimal thermal damage to the surrounding material. Longer pulsed lasers, with pulse durations of milli- and microseconds, are used primarily for laser through-cutting and welding. In this work, a two-pulse sequence using microsecond pulse durations is …
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Applicability of hybrid methods in engine control system design
… for control was developed to represent the thermal wave behaviour observed in worst-case regenerations, where the soot in the filter burns to create local high temperature regions. A DPF was instrumented and fitted to the diesel engine and tested in the development of this model, …
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Experimental investigation of damage evolution during strain burst in brittle rocks for deep mines
… mechanism of strain burst and the influence of thermal damage, high confining pressure and various loading rate on the overall mechanical behaviour of highly brittle granitic rocks leading to strain burst. Strain burst is related to the elastic stored strain energy and how this stored energy is …
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Processing-surface integrity-fatigue relationship in electrical discharge machining of nitinol shape memory alloy
… alloy (SMA) with two unique properties, i.e., thermal shape memory and superelasticity. Nitinol has broad applications in medical device, aerospace, actuator, machine tool, and civil industries due to its excellent mechanical properties, high fatigue strength, superior corrosion resistance, and …
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The use of isothermal membrane distillation in tomato processing
… of tomato paste preparation by the use of isothermal membrane distillation (IMD). Traditional vacuum evaporation processes used for tomato paste production operate at high temperatures for long periods and can cause thermal damage to heat sensitive components and loss of volatile flavour and …
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