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 24 for “"UST."”.
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Fundamental research regarding the ultrasonic stirring effects on the microstructure of A356 castings
Ultrasonic stirring treatment (UST) of molten metal has significant effects on the solidification microstructure of A356 alloy, which includes grain structure, distribution of inclusions, refinement of secondary phases, etc. The primary causes are due to ultrasonic cavitation, acoustic streaming …
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The Role Of Tissue Sound Speed As A Surrogate Marker Of Breast Density
… of ionizing radiation. Ultrasound tomography (UST) does not use ionizing radiation and can create tomographic breast sound speed images. These sound speed images are useful because breast density is proportional to sound speed. The purpose of this work was to assess the ability of UST to …
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The economic impacts of alternative underground storage tank regulations on the vulnerable segments of the retail motor fuel market in Virginia
… and operators of underground storage tanks (USTs) containing petroleum products, and substances listed as hazardous in the Comprehensive Environmental Response Compensation and Liability Act, but not regulated as hazardous waste under RCRA subtitle C. On 17 April 1987, EPA issued proposed …
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Influence of ultrasonic cavitation treatment on fragmentation and de-agglomeration of primary intermetallics and oxides formed in Al alloys
… and food sector. One such prevalent and industrially accepted processing technique is ultrasonic melt treatment (UST) which aids in improving the mechanical properties of metals and alloys by influencing their final microstructure. UST effectively promotes grain refinement by utilising the …
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Non-contact quantitative imaging of limbs, bone and tissue, using ultrasound tomographic techniques
… to observational data sets collected on two custom built ultrasound imaging systems for limb imaging. The images are quantitative in that the distribution of sound speeds and dimensionally accurate geometry of tissue structures are reconstructed. The first imaging system is based on laser …
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Conformally invariant scaling limits of random curves and correlations
… random models, the uniform spanning tree (UST) and the loop-erased random walk (LERW). We obtain conformally covariant expressions for the scaling limit probabilities of certain UST branch connectivities and of LERW boundary visits. These expressions are solutions to partial differential …
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Identification and Modification of Risk Factors Contributing to Slip- and Trip-Induced Falls
… The two methods were: unexpected slip training (UST), which involved repeated unexpected slips while walking and volitional slip-recovery training (VST), which involved practicing balance reactions after volitionally inducing a slip-like perturbation. Young adults completed one session of an …
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Innovative Acoustic Reflection Imaging Techniques And Application To Clinical Breast Tomography
… the emerging new field of ultrasound tomography (UST). We present a new technique for reconstruction of reflection images from UST data. We have extended the planar Kirchhoff migration method used in geophysics, and combined it with sound speed and attenuation data obtained from the transmission …
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Odpad jako przedmiot obrotu cywilnoprawnego z perspektywy wdrażania gospodarki obiegu zamkniętego
… jest określenie, czy uregulowana w art. 27 ust. 3 u.o. konstrukcja przeniesienia administracyjnoprawnej odpowiedzialności za zagospodarowanie odpadów rzeczywiście zapewnia ochronę zdrowia i życia ludzi oraz środowiska przed negatywnymi konsekwencjami nieprawidłowego postępowania z odpadami, …
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Listening and Musical Composition: Spectromorphological Analysis of Enfilade: Lamento-Cambiata
… Thoresen's work on spectromorphology, as well as UST categorizations of Laboratoire de musique et informatique de Marseille. Finally, the relationship of spectromorphological units with the formal design is compared for the purpose of shedding light to the relationship between the musical …
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Full season navigation and control of ultra-compact autonomous ag-bot in GPS denied environment
… under cluttered canopies using only a 2-D Hokuyo UST-10LX LiDAR and an RTK GPS as the primary sensors for navigation. Its purpose is to ensure that the robot can navigate through rows of crops without damaging the plants in narrow row-based and high-leaf-cover semi-structured crop plantations, …
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Microtremor recordings in Northern Mississippi: Evaluating site effect and correlating with wave climate
… with unconsolidated sediments thickness (UST) and average shear wave velocity (Vs) are also estimated. Within the low frequency range (<0.2Hz), high HVSRs are observed in most LTRs and STRs, which is possibly caused by the wind either directly blow on the seismometer or on the buildings …
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A cultura indígena aos olhos da literatura cinzenta disponível na BDTD: uma análise de teses e doutorado
ust as the indigenous peoples represent a small part of the total Brazilian population, the gray literature also occupies a small niche in relation to the total scientific production of the country. This is an exploratory and descriptive research that aims to analyze the scientific production …
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Design, manufacturing and testing of parachute recovery system for aludra SR-10 unmanned aerial vehicle (UAV)
Unmanned Systems Technology (UST) Aludra SR-10 Unmanned Aerial Vehicle (UAV) was purposely designed for survey and mapping mission. This study focuses on the design, manufacturing and testing of Parachute Recovery System (PRS) on the Aludra SR-10 UAV. A design work of PRS involving in defining a …
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Essays on New Keynesian Term Premium Model with Financial Risks
… studies the modeling of U.S. Treasury (UST) yield curve term premia under the New Keynesian (NK) framework. Loosely speaking, term premium is the difference between a government bond’s yield for a specific tenor and the average of the expected short rates up to that tenor. The …
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Multi-proxy palaeoclimate reconstruction of the permian-triassic mass extinction event
… reported from organic carbon in Antarctica, Australia, India and Madagascar, and from marine carbonate in the Karoo Basin. However, these sections are all from southern palaeolatitudes. Analysis from the Permian-Triassic terrestrial sedimentary record of the South Urals, in Russia, comprising …
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The exploratory study of public opinion on terrorism and factors influencing it in Kazakhstan.
… focus groups were conducted in Kazakh city of Ust- Kamenogorsk. Particular attention was paid to thematic analysis of focus group discussions, and content analysis of Kazakh printed and visual media. Some of the core findings derive from the discussion about the influence of Russian television …
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Circumstellar Distribution of Dust Grains Around Proto -Planetary Nebulae: Observational Evidence for Axisymmetry and 2.5-D Radiative Transfer Model Calculations
… Largely spherically symmetric circumstellar dust shells of AGB stars are known to evolve into mostly axisymmetric PNs. Since the PPN phase predates the period of final PN shaping due to interacting stellar winds, the PPN shells preserve pristine records of AGB mass loss histories. Hence, the …
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Three-Dimensional Modeling of Solute Transport with In Situ Bioremediation Based on Sequential Electron Acceptors
… electron acceptors, and endproducts at a leaking UST site. The model was calibrated using historical site data, and predictive capabilities of the model were tested against subsequent sets of field data. The model was used to examine the effect of porous media heterogeneities on contaminant …
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