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 11 of 11 for “"UCAs"”.
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Estimating the concentration of ultrasound contrast agents using ultrasonic backscatter in vitro
Ultrasound contrast agents (UCAs) are tiny microbubbles used clinically to enhance the contrast of B-mode images. Recently, UCAs have been combined with therapeutic ultrasound techniques to increase their effectiveness. These therapeutic techniques often require high concentrations of UCAs at …
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Acoustic characterisation of ultrasound contrast agents at high frequency
… properties of ultrasound contrast agents (UCAs) at high ultrasound frequencies. In recent years, there has been increasing development in the use of high frequency ultrasound in the fields of preclinical, intravascular, ophthalmology and superficial tissue imaging. Although research …
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Quantification of Ultrasound Contrast Agents Using High-Frequency Ultrasound
Ultrasound contrast agents (UCAs) are small microbubbles filled with gas. Because of their scattering properties, UCAs enhance the diagnostic capabilities of ultrasonic imaging. UCAs are associated with therapeutic or enhancing therapeutic applications of ultrasound and with possible adverse …
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Collapse dynamics of ultrasound contrast agent microbubbles
Ultrasound contrast agents (UCAs) are micron-sized gas bubbles encapsulated with thin shells on the order of nanometers thick. The damping effects of these viscoelastic coatings are widely known to significantly alter the bubble dynamics for linear and low-amplitude behavior; however, their effects …
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The Role of Ultrasound Contrast Agents in Producing Sonoporation
… mechanism of sonoporation. Oscillation of UCAs near a cell produced microstreaming that resulted in shear stress on the cell membranes. This shear stress resulted in sonoporation, a permeability change that allowed for the uptake of macromolecules into the cells.
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Urban change agents: citizen-based projects in Cape Town as drivers of transformative pathways towards a climate-friendly, socially just, economically viable and ressource-efficient urban future
… actors, defined as “Urban Change Agents” (short: UCAs). The research findings deliver insights into the motivation, goals, resources and tools required to perform within their transformative action fields (e.g. reuse and recycle, low-carbon mobility, urban agriculture, and sustainability …
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Systems-theoretic process analysis of small unmanned aerial system use at Edwards Air Force Base
… were made to mitigate potential causes of the UCAs. After comparing this analysis to the existing guidance in AFTCI 91-202 and EAFBI 13-100, nine action items were identified that will enhance the safety of the system as it currently exists.
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An empirical study of the effect of brand personality and consistency between marketing channels on performance within the UK higher education sector
… two marketing channels performed better on RAE, UCAS Demand and points. This agrees with the existing literature, which suggests that brands represent crucial aspects of success in mature markets, and that consistency can be a key driver in creating strong brands. This research shows that these …
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The nature and experiences of the dyslexia population in higher education : a case study
… in the context of national data (HESA and UCAS) to establish the nature of the population being investigated. A range of measures were completed by current students of the institution, addressing: aspects of experiences of dyslexia; personality; learning mode preferences; and support use, …
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An examination of the experience of individuals, from different vocational and academic entry routes, on a B.A. Educational Studies degree and in subsequent postgraduate study or employment
… entry routes were accepted with a wider range of UCAS points than students from vocational entry routes, but both groups fared equally well on the degree, whatever the nature of their pre-entry qualifications or whichever subjects they studied beforehand. Mature students, in general, had higher …
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Discoursing performativity for 21st century education: an ethnographic study of high-achieving 6th form students completing A-Level study and progressing into higher education in the UK from Brook College
… chapters focus, in turn, on UCAS Personal Statements, and on a new teaching and learning approach called The A-Level Mindset implemented in Brook College during fieldwork. I explore these analytic ‘subjects’ as “instrumental” cases (Stake, 2005) to, ultimately, examine the …