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Dissertations / Theses on the topic 'Ultrasound-assisted'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Kabbani, Dania. "Ultrasound-assisted liquefaction of honey." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/144664.

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Crystallization of honey is a common process of the honey industry. Liquid honey is preferred by most of the consumers and by food companies for ease of handling. Honey is commonly heated during pasteurization in order to liquefy it and inhibit any microbial growth. However, heating can degrade the main quality parameters of honey. A better method compared to expensive and time-consuming heating is desirable to pasteurize, accelerate the liquefaction and retard the crystallization process in honey. The present thesis documents the work done at investigating the effect of the ultrasounds (U

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2

Koegelenberg, Coenraad Frederik Nicolaas. "Ultrasound-assisted transthoracic diagnostic techniques." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/18054.

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Thesis (PhD)--University of Stellenbosch, 2011.<br>ENGLISH ABSTRACT: Although transthoracic ultrasonography is a well established modality, it is still underutilised by chest physicians. The aim of this research project was to investigate the feasibility, diagnostic yield and safety of ultrasound(US)-assisted transthoracic biopsies performed by clinicians in various settings relevant to daily practice of respiratory medicine. We conducted four clinical trials which are summarised below: 1. In a prospective study on the feasibility of US-assisted transthoracic fine needle aspiration (TTFN

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3

Hwangbo, Chang Kwon. "Optical thin films prepared by ion-assisted and ultrasound-assisted deposition." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184577.

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Optical, electrical, and microstructural effects of Ar ion bombardment and Ar incorporation on thermally evaporated Ag and Al thin films were investigated. The results show that as the momentum supplied to the growing films by the bombarding Ar ions per arriving metal atom increases, refractive index at 632.8 nm increases and extinction coefficient decreases, lattice spacing expands, grain size decreases, electrical resistivity increases, and trapped Ar increases slightly. In Ag films, stress reverses from tensile to compressive; in AI films compressive stress increases. In both films, the cha

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4

Duhayon, Christophe. "Copper solvent extraction by ultrasound-assisted emulsification." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210155.

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The goal of this research is to improve an extractive metallurgy process based<p>on solvent extraction. This process should fit the exploitation of small local<p>copper-rich deposits. In these conditions, the plant has to be as compact as<p>possible in order to be easily transported from one location to a subsequent<p>one. Improved extraction kinetics could ensure a high throughput of the<p>plant despite its compactness. In addition, the extraction reagent should<p>not be damaging for the environnement. On this basis, we propose to use<p>ultrasound-assisted solvent extraction. The main idea is

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Gooding, Mark. "3D ultrasound image analysis in assisted reproduction." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408695.

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6

Ozcan, Evren. "Ultrasound Assisted Extraction Of Phenolics From Grape Pomace." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12606908/index.pdf.

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Grape pomace is a by-product of wineries. It is one of the most potent antioxidant sources due to its high phenolic content. In this thesis study, ultrasound assisted extraction of phenolic compounds from Merlot grape pomace has been studied. The effects of sonication time, subsequent extraction time in shaking water bath at 45&deg<br>C and composition of the solvent on extraction efficiency and recovery of phenolics were studied by response surface methodology. Folin-Ciocalteu colorimetric method was used to analyze effects of process parameters on the total phenolic content of the extracts.

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Kadour, Michael J. "Assisted-freehand ultrasound elasticity imaging of the breast." Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670171.

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8

tan, yi. "Enzyme Catalyzed and Ultrasound Assisted Transformation of Selected Pollutants." FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3220.

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The widespread use of synthetic drugs and as feed additives has resulted in the release of large amounts of biologically active chemicals into the environment. Exposure to environmentally relevant concentrations of chemicals can have severe effects on human health. Therefore, effective degradation of these synthetic, biologically active compounds is of paramount importance. Diphenhydramine (DPH) has been selected as a target compound for ultrasound remediation. The results demonstrated that ultrasound-induced degradation has potential applications in managing aqueous media contaminated with DP

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9

Yip, Michael Chak Luen. "Ultrasound registration and tracking for robot-assisted laproscopic surgery." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/37063.

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In the past two decades, there has been considerable research interest in medical image registration during surgery. The overlay of medical images over the images from a surgical camera allows the surgeon to see sub-surface features such as tumor boundaries and vasculature. Ultrasound imaging is a prime candidate for medical image registration, as it is a real-time imaging modality and therefore is commonly-used for intraoperative surgical guidance. Prior technologies that attempted ultrasound-based registration have used external trackers in order to establish a geometric correspondence betwe

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10

Melikoglu, Mehmet. "Ultrasound Assisted Extraction Of Lipids And Antioxidants From Wheat Germ." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/3/12605799/index.pdf.

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The aim of this thesis work was to extract lipids and antioxidants from wheat germ using an ultrasonic bath. Alternative solvents: Ethanol, isopropanol and acetone were used for the extraction purposes and for the fat content determination hexane was used. Alternative solvents dissolve wax, phospholipids and some other proteins because of their polar nature which increased the yield. Since waxes and some proteins can be added to the soaps and creams which were made from carrier oils, obtaining these substances together with the oil in the extract was very useful. For isopropanol a linear relat

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11

Tudela, Montes I. "Novel ultrasound-assisted electrodeposited Ni-based coatings for bearing applications." Thesis, Coventry University, 2015. http://curve.coventry.ac.uk/open/items/d5937c67-9161-4709-8852-fa73c566aa26/1.

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The purpose of the present PhD research project was to evaluate the feasibility of the electrodeposition of novel thin Ni composite coatings with lubricant particles from an additive-free Watts bath and their application as diffusion barrier layers in journal bearings for medium-speed diesel engines. Overall, the main objective was to develop thin Ni composite coatings with the following characteristics: • Improved tribological performance. • Good adhesion properties. • Good ‘anti-diffusion’ performance. Ultrasound was used in the preparation of pure Ni coatings and Ni composite coatings with

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12

Latheef, Mohsin Bin. "Pulsed ultrasound-assisted solvent extraction of oil from soybeans and microalgae." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107890.

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The two biological oils used in this study come from two distinctly different sources; soybeans and microalgae. Yet, both are economically important due to the similarities in their nutritional and industrial value. Besides being the top sources for health-promoting polyunsaturated fatty acids (PUFA), both oils are becoming increasingly important in the production of biodiesel (through transesterification). The microalgal species chosen for the current study was Nannochloropsis oculata, a small marine microalga known for its unusually high lipid content. Conventionally, soybean and microalgal

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13

Miller, Naomi Rachel. "Human and computer-assisted perception of elastic lesions in ultrasound images." Thesis, Institute of Cancer Research (University Of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394366.

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14

Yu, Dajun. "Ultrasound-assisted enzymatic extraction of protein hydrolysates from brewer's spent grain." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/97875.

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Brewer's spent grain (BSG) is the most abundant by-product of the brewing industry and its main application is limited to low-value cattle feed. Since BSG contains 20 to 25% of proteins, it has the potential to provide a new protein source to the food industry. In this research, an ultrasound-assisted enzymatic extraction was designed to extract protein hydrolysates from BSG. Original BSG and ultrasound pretreated BSG were hydrolyzed under different enzyme (Alcalase) loadings and incubation times. Centrifugation was applied to separate solubilized proteins from insoluble BSG residue. When the

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15

BARTZOKA, ELISAVET. "Ultrasound assisted synthesis of polyphenol micro-capsules for controlled active delivery." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2016. http://hdl.handle.net/2108/201819.

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16

Chang, Wei-Ping. "Ultrasound-assisted surface-modification of wood particulates for improved wood/plastic composites." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5824.

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Thesis (M.S.)--West Virginia University, 2008.<br>Title from document title page. Document formatted into pages; contains iv, 87 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 83-86).

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Prabhavathi, Kalluri. "Ultrasound-assisted synthesis of some N-heterocyclic long-chain fatty ester derivatives." Thesis, Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17592185.

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18

Gelmez, Nilufer. "Ultrasound Assisted And Supercritical Carbon Dioxide Extraction Of Antioxidants From Roasted Wheat Germ." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609364/index.pdf.

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This study covers the extraction of antioxidants from wheat germ<br>which is the byproduct of the flour-milling industry and a rich source of antioxidants<br>with Ultrasound Assisted (UAE) and Supercritical Carbon Dioxide (SC-CO2) extractions. Extraction conditions were ultrasonication time (1&ndash<br>11 min), temperature (20&ndash<br>60&deg<br>C) and ethanol level (5&ndash<br>95%) for UAE, and pressure (148&ndash<br>602 bar), temperature (40&ndash<br>60&deg<br>C) and time (10&ndash<br>60 min) for SC-CO2 extraction. The extraction conditions were optimized based on yield (%), total phenolic c

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Adebar, Troy Kiefert. "A system for intraoperative transrectal ultrasound imaging in robotic-assisted laparoscopic radical prostatectomy." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/37004.

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This thesis describes a system for intraoperative transrectal ultrasound imaging in robotic-assisted laparoscopic radical prostatectomy, and related image registration work. First, a novel method for registering three-dimensional ultrasound data to an external coordinate frame is presented. The method uses a registration tool pressed against an air-tissue boundary to provide common target points in the the ultrasound frame and the external frame. This method has two applications in our system: registering the ultrasound data captured by the system to a laparoscopic stereo camera to allow augme

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Christakou, Athanasia. "Ultrasound-assisted Interactions of Natural Killer Cells with Cancer Cells and Solid Tumors." Doctoral thesis, KTH, Biomedicinsk fysik och röntgenfysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158522.

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In this Thesis, we have developed a microtechnology-based method for culturing and visualizing high numbers of individual cells and cell-cell interactions over extended periods of time. The foundation of the device is a silicon-glass multiwell microplate (also referred as microchip) directly compatible with fluorescence microscopy. The initial microchip design involved thousands of square wells of sizes up to 80 µm, for screening large numbers of cell-cell interactions at the single cell level. Biocompatibility and confinement tests proved the feasibility of the idea, and further investigation

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Gao, Xiang. "Ultrasound Assisted Extrusion and Properties of Polycarbonate/Carbon Nanotubes Composites and Cast Films." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1493394163570255.

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22

Cheung, Wing Keung. "Computer assisted analysis of contrast enhanced ultrasound images for quantification in vascular diseases." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/46039.

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Contrast enhanced ultrasound (CEUS) with microbubble contrast agents has shown great potential in imaging microvasculature, quantifying perfusion and hence detecting vascular diseases. However, most existing perfusion quantification methods based on image intensity, and are susceptible to confounding factors such as attenuation artefacts. Improving reproducibility is also a key challenge to clinical translation. Therefore, this thesis aims at developing attenuation correction and quantification techniques in CEUS with applications for detection and quantification of microvascular flow / perfus

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23

Alessi, Sebastiano <1995&gt. "Ultrasound-assisted synthesis of lignin microcapsules for the controlled release of active compounds." Master's Degree Thesis, Università Ca' Foscari Venezia, 2021. http://hdl.handle.net/10579/19173.

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Lignin represents a highly valuable, yet very underutilized biobased material. Being the most abundant source of aromatics on the planet, it is produced in high quantities as by-product of pulp and paper industries and biorefineries. Due to the high degree of structural variability, which depends on the different plant origin and harsh conditions experienced during the processing, an exhaustive valorisation of lignin is all but straightforward. Among various possibilities, the synthesis of micro- and nano-structures from untreated technical lignins is one of the best solutions for the developm

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24

Suzuki, Hiroyuki. "Bearing surface optimisation on hydrodynamic lubrication film with vibration-assisted machining and ultrasound reflectometry." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12303/.

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The collapse of full-film hydrodynamic lubrication in a journal bearing often leads to a significant failure of the whole machine. In order to delay such full-film lubrication collapse, surface optimisation by implementing bespoke surface texture has spurred industrial interest. This thesis aims to optimise the journal bearing surface for an automotive transmission, addressing the deficiency of understanding of the effects of bespoke surface texture on hydrodynamic lubricant film formation under real operation by developing an accurate, inexpensive and fast texturing technique to create bespok

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Schäfer, Sebastian [Verfasser], and Klaus [Akademischer Betreuer] Tönnies. "Computer-assisted motion compensation and analysis of perfusion ultrasound data / Sebastian Schäfer. Betreuer: Klaus Tönnies." Magdeburg : Universitätsbibliothek, 2014. http://d-nb.info/1054638055/34.

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Pastor, Alberto Claudio Miano. "Ultrasound assisted hydration of grains with sigmoidal behavior: kinetics of hydration, cooking, germination and nutrient incorporation." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/11/11141/tde-21012019-145147/.

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This Thesis had as objectives to study the hydration process of grains with sigmoidal behavior, evaluating ultrasound technology to improve it, the possible effects on germination, cooking and a possible incorporation of nutrients. The work was developed in three parts. The first part consisted of describing the hydration kinetics of many grains to have a data bank of hydration kinetics, allowing further selections. Furthermore, this part compared the differences among grains hydration kinetics, associating them with the intrinsic properties of the grains and questioning some inferences previo

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Mozes, Alon. "3D A-Mode Ultrasound Calibration and Registration of the Tibia and Femur for Computer-Assisted Robotic Surgery." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/114.

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Registration is a key component for computer-navigated robot-assisted surgery. Invasive approaches such as fiducial-based and surface matching with mechanical probes are common but ultrasound may provide a non-invasive alternative. If an A-mode ultrasound transducer can be used to percutaneously select data points on the bones, a registration can be determined without needing any incision. This study investigates selecting an A-mode ultrasound transducer, calibrating it, analyzing the ultrasound signal, and using it to register a phantom sawbone tibia and femur as well as cadaveric specimens.

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Kumar, Rishi. "Manufacturing of High Performance Polymer Nanocomposites Containing Carbon Nanotubes And Carbon Nanofibers Using Ultrasound Assisted Extrusion Process." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1291639408.

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Carregari, Polachini Tiago. "Evaluation of the acid pretreatment of agroindustrial waste assisted by high-intensity ultrasound for further bioethanol production." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/129850.

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[ES] El pre-tratamiento de los residuos de la agroindustria es una de las etapas más complejas del proceso de conversión de biomasa en bioetanol. Esta etapa consiste basicamente en aplicar tratamientos físicos o químicos a la biomasa con el objetivo de conseguir la hidrolización parcial de los carbohidratos y que ésos se vuelvan más acesibles para la posterior actuación de enzimas y microrganismos. En este sentido, el uso de ultrasonidos de alta intensidad se ha mostrado como una tecnología con un potencial interesante para, en combinación con métodos convencionales, intensificar los procesos

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Polachini, Tiago Carregari. "Evaluation of the acid pretreatment of agroindustrial waste assisted by high-intensity ultrasound for further bioethanol production /." São José do Rio Preto, 2019. http://hdl.handle.net/11449/183067.

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Orientador: Javier Telis Romero<br>Orientador: Juan Andrés Cárcel Carrión<br>Coorientador: Antonio Mulet Pons<br>Banca: José Vicente García Pérez<br>Banca: José Manuel Lorenzo Rodriguez<br>Banca: Pedro Esteves Duarte Augusto<br>Banca: Roger Darros Barbosa<br>Resumo: O pré-tratamento dos resíduos da agroindústria é uma das etapas mais complexas do processo de conversão da biomassa em bioetanol. Esta etapa consiste basicamente na aplicação de tratamentos físicos ou químicos à biomassa com o objetivo de hidrolizar parcialmente os carboidratos e que estes se tornem mais acessíveis para a ação subs

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DATTA, SAURABH. "The Role of Cavitation in Enhancement of rt-PA Thrombolysis." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1196034787.

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Zettinig, Oliver [Verfasser], Nassir [Akademischer Betreuer] [Gutachter] Navab, and Terry [Gutachter] Peters. "Advanced Ultrasound Imaging Techniques for Computer Assisted Interventions / Oliver Zettinig ; Gutachter: Nassir Navab, Terry Peters ; Betreuer: Nassir Navab." München : Universitätsbibliothek der TU München, 2017. http://d-nb.info/1142376524/34.

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Daftardar, Saloni B. "Ultrasound-mediated Topical Delivery of Econazole nitrate for Treating Raynaud’s Phenomenon." University of Toledo Health Science Campus / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=mco1501501075880616.

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34

Hacihaliloglu, Ilker. "Towards a novel minimally invasive three dimensional ultrasound imaging based computer assisted orthopaedic surgery system for bone fracture reduction." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/24463.

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Current practice in orthopaedic surgery relies on intra-operative two dimensional (2D) fluoroscopy as the main imaging modality for localization and visualization of bone tissue, fractures, implants, and surgical tool positions. However, with such projection imaging, surgeons typically face considerable difficulties in accurately localizing bone fragments in three dimensional (3D) space and assessing the adequacy and accuracy of reduced fractures. Furthermore, fluoroscopy involves significant radiation exposure. Ultrasound (US) has recently emerged as a potential non-ionizing imaging alternati

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Skerl, Katrin. "Standardisation and quality assurance of 2D ultrasound Shear Wave Elastography imaging in breast tissue." Thesis, University of Dundee, 2016. https://discovery.dundee.ac.uk/en/studentTheses/5ee2b3ed-89aa-4874-830a-ec9be233aae4.

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Breast cancer is the most common cancer in women worldwide. In 2009, a novel imaging modality called Shear Wave Elastography (SWE), an ultrasound technique visualising the elasticity of tissue, was introduced to the field of clinical breast imaging. Because malignant tissues are generally stiffer than benign tissues, SWE supports the differentiation of benign / malignant solid breast lesions. However, no standard has yet been defined for the application and the evaluation of results. Furthermore, image evaluation has to be carried out directly from the ultrasound system, complicating long-term

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Martins, Wellington de Paula. "Avaliação do volume endometrial pela ultra-sonografia tridimensional em procedimentos de reprodução assistida." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/17/17145/tde-26092013-161552/.

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A ultra-sonografia é essencial para a condução de casos que irão ser submetidos aos tratamentos de reprodução assistida. Apesar de inúmeras pesquisas, não se mostrou capaz de predizer o sucesso do procedimento e apenas a medida da espessura endometrial tem algum valor prognóstico. Com a introdução da ultra-sonografia tridimensional, cresceu o interesse no assunto, na esperança que a possibilidade de uma avaliação espacial mais exata dos tecidos e da vascularização pudesse melhorar nossa habilidade de predizer a resposta à estimulação ovariana ou determinar a receptividade do meio endom

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Smalberger, Charl. "Ultrasound-assisted cell eradication." Thesis, 2020. https://hdl.handle.net/10539/31112.

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A dissertation submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Master of Science in Engineering, 2020<br>Ultrasound-based cell separation and eradication methods are advantageous because of cost-effectiveness, efficiency and its non-invasive nature. The purpose of the research was to manipulate white and red blood cells with ultrasound and force these cells to translate. This research will contribute towards an ultrasound-based method to differentiate between mala

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Tu, Wen-chun, and 杜文鈞. "Ultrasound-assisted biopsy navigation system." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/81940940587433820034.

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碩士<br>國立中央大學<br>機械工程研究所<br>100<br>Ultrasonic guided biopsy is the most popular approach to diagnose whether tumor is benign or malignant. However, biopsy by free-hand or using probe-attached guidance device cannot avoid needle deflection and misalignment due to external forces. In addition, the biopsy direction must follow and along the plane of ultrasound image which restrict the flexibility to adjust the needle direction to avoid critic tissues. Therefore, it is hard for physicians to do deep and small tumor biopsy clinically. In this research, an ultrasound-assisted biopsy navigation system

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Abolmaesumi, Purang. "Image-guided robot-assisted diagnostic ultrasound." Thesis, 2002. http://hdl.handle.net/2429/13295.

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Ultrasound technicians are often required to hold the transducers in awkward positions for prolonged periods of time, while exerting large forces. As a result, they suffer from an unusually high incidence of musculoskeletal disorders. A novel robot-assisted tele-operation system has been proposed at the University of British Columbia to alleviate these problems. This thesis is part of this larger tele-operation system for diagnostic ultrasound. It contributes several novel real-time feature tracking methods for ultrasound images, the development of the "ultrasound visual servoing" concep

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Lin, Shan-Shian, and 林尚賢. "Ultrasound Assisted Ultrafiltration membrane Cleaning Process." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/53164675960909431646.

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碩士<br>國立臺灣大學<br>環境工程學研究所<br>95<br>The most concerned issue in membrane filtration process is membrane fouling that causes permeate flux decline, reduces operation period and increases operation cost. In this study, ultrasound (US) assisted filtration and cleaning process was applied for fouling prevention and cleaning in ultrafiltration (UF) systems fouled by humic acid. Low frequency (20 kHz) probe type ultrasound propagated on the top of flat-sheet polyethersulfone (PES) membrane. Flux measurement indicates that US assisted membrane filtration operated at lower pressure and using smaller MW

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Tsai, Shih-Chia, and 蔡石家. "Ultrasound-assisted vibration grinding of particles." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/74209202695994048531.

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碩士<br>國立中興大學<br>精密工程學系所<br>100<br>A device for preparing microscale particles by ultrasonic-assisted mechanical grinding is proposed. An automatic mechanism for adjusting the tool gap, an ultrasonic horn for vibration amplitude amplification and an ultrasonic signal generator are included in the device. Raw particles with average diameters ranging from 50 μm to 55 μm are used in the experiments. The tool gap between 0.1 mm and 0.5 mm are selected for the particle grinding. The experimental results show that the average diameter of the particles particles is nearly 14 μm.

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Jhang, Chong-Ren, and 張崇仁. "Ultrasound-assisted study of composite plating." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/kgv6qm.

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碩士<br>國立虎尾科技大學<br>機械與機電工程研究所<br>97<br>Chromium metal deposition general way the market is almost as plating layer, and its technology and to explore a variety of more sophisticated questions, but domestic chrome plating for non-related research rarely, and even non-related chemical composition of plating bath studies, while the chromium-free plating study the deposition of very low efficiency. In this study, combined electric plating and chemical-free way composite deposition coating of chromium metal plate attached to on, and to achieve good deposition rate and luster, mainly for the combinat

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Correia, Guilherme Alexandre da Costa. "Robotic-assisted approaches for image-controlled ultrasound procedures." Master's thesis, 2019. http://hdl.handle.net/10451/41493.

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Tese de mestrado integrado, Engenharia Biomédica e Biofísica (Engenharia Clínica e Instrumentação Médica), Universidade de Lisboa, Faculdade de Ciências, 2019<br>A aquisição de imagens de ultrassons (US) é atualmente uma das modalidades de aquisição de imagem mais implementadas no meio médico por diversas razões. Quando comparada a outras modalidades como a tomografia computorizada (CT) e ressonância magnética (MRI), a combinação da sua portabilidade e baixo custo com a possibilidade de adquirir imagens em tempo real resulta numa enorme flexibilidade no que diz respeito às suas aplicações em

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Domingues, Luís Évora. "Drug delivery assisted by ultrasound in viscoelastic materials." Master's thesis, 2022. http://hdl.handle.net/10316/99380.

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Dissertação de Mestrado em Matemática apresentada à Faculdade de Ciências e Tecnologia<br>The main goal of this work is the analytical and numerical study of a differential system defined by an integro-differential equation of hyperbolic type and a convection-diffusion-reaction equation. This system arises in the mathematical modeling of drug delivery enhanced by ultrasound. In this case, the hyperbolic equation describes the target displacement generated by ultrasound and the second equation describes the drug transport. The parabolic equation depends on the displacement and eventually on its

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Li, Haizhou. "Ultrasound and microwave assisted extraction of soybean oil." 2002. http://etd.utk.edu/2002/LiHaizhou.pdf.

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Thesis (M.S.)--University of Tennessee, Knoxville, 2002.<br>Title from title page screen (viewed on Feb. 26, 2003). Thesis advisor: Lester O. Pordesimo. Document formatted into pages (viii, 68 p. : ill. (some col.)). Vita. Includes bibliographical references (p. 60-67).

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Yustianingsih, Lidia, and 莉蒂亞. "Ultrasound-assisted in-situ production of biodiesel fromrice bran." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/t3625y.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>95<br>A study on the application of ultrasound on in situ methanolysis of rice bran to produce biodiesel has been carried out in this work. Biodiesel production cost may be reduced by using a low-cost raw material, such as rice bran, and by in situ esterification (methanolysis), yet it gives low conversion for rice bran with low free fatty acid (FFA) content. In order to improve production yield for rice bran with mid- to low FFA content, the effects of reaction temperature, time, FFA content on ultrasound-assisted methanolysis were investigated. From the study, it c

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Liu, Huail-Siang, and 劉懷翔. "The study on the ultrasound assisted atomic forcemicroscopy base nanomachining." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/89695769448064414902.

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碩士<br>東南科技大學<br>機械工程研究所<br>101<br>This study focused on the combination of atomic force microscopy (AFM) and quartz crystal microbalance (QCM) to construct the ultrasound assisted AFM base nanomachining experimental platform, and to construct the experimental planning of ultrasonic assisted nanomachining, to understand the phenomena of the ultrasound assisted AFM base nanomachining. Firstly, we combined the AFM and QCM to construct the ultrasound assisted AFM base nanomachining experimental platform. And a normal force measurement model was built by force curve measurements in ultrasound vi

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Vilhena, Nádia Andreia Pacheco. "Ultrasound assisted oncolytic virotherapy: in vitro and in vivo studies." Master's thesis, 2015. http://hdl.handle.net/10451/22381.

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Tese de mestrado integrado em Engenharia Biomédica e Biofísica, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2015<br>A ‘sonoporação’ é um processo através do qual a permeabilidade de membranas celulares é modificada. Esta alteração na membrana leva à formação de poros através dos quais pequenas moléculas conseguem passar. Nas últimas décadas, investigação na área de viroterapia mediada por ultrassons focalizados, na presença de agentes de contraste, designados por ‘micro bolhas’, provou que este tratamento poderia ser uma boa alternativa para o tratamento de tumores.

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Li, Chin-Ta, and 李勁達. "Research on Ultrasound Assisted Nd-YAG Laser Micro-Machining for Brass." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/74795382570670102621.

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碩士<br>國立中正大學<br>機械工程所<br>98<br>In recent years, laser micromachining has excellent processing characteristics in related field. Micromachining technology has to become mainstream today. But the difficult thing in laser machining is the surface uneven. This is about a study of using a pulsed Nd-YAG laser to process the Cu assisted with gas and ultrasonic.Because the process of pulsed Nd-YAG laser ablating metal is a mechanism involved ultra-high temperature, so the HAZ (heat affected zone) is usually found around processed area. It was found that during the process of ablation, molten metal spr

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Lin, Bo-Yu, and 林柏諭. "Investigation on lipid extraction of microalgae assisted by microwave and ultrasound." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/08194044264048834496.

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碩士<br>國立臺灣海洋大學<br>輪機工程系<br>99<br>Supersound and microwave were used to assist the lipid extraction of microalgae by solvents in this study. Crude lipid extracted quantity between the supersound and microwave-assisted lipid extraction under various solvents, extracting time and power were compared. The effect of emulsified solvent on the crude lipid extraction ratio was studied as well. The experimental results show that Isochrysis galbana extracted by microwave using the solvent mixture of n-heptane and iso-propanol in 2:1 volumetric ratio had the largest extracted quantity of crude microalgae

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