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 10 of 10 for “"Human airways"”.
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Understanding the Collective Dynamics of Motile Cilia in Human Airways
… to this thesis, is mucociliary clearance in human airways: A carpet of motile cilia helps keeping the cell surface free from pathogens and foreign particles by constantly evacuating from lungs, bronchi, and trachea a barrier of mucus. The question of how motile cilia interact with one another …
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Numerical investigation of airflow and aerosol deposition characteristics within human airways
Aerosolized drug delivery in human airways is typically used for the treatment of several pulmonary diseases. In this study, large-eddy simulation (LES) is used for the numerical investigation of the airflow and the aerosol deposition characteristics within the upper human airways. LES is performed …
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Computational and experimental time domain, one dimensional models of air wave propagation in human airways
… this formulation to study pulse waveforms in the human bronchial tree. Experiments have been carried out, in this work, to validate the model capabilities in modelling pressure and velocity waveforms when air pulses propagate in flexible tubes with different mechanical and geometrical properties. …
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CFD simulation of the airflow through the human respiratory tract
This study compares the effect of extra-thoracic airways (ETA) on the flow field through the lower airways by carrying out simulations of the airflow through the human respiratory tract. Three geometries, consisting of the ETA, CT-derived lower airway, and a combination of the two were utilized in …
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Improvements to the acoustic pulse reflectometry technique for measuring duct dimensions
… pipeline sections, musical wind instruments and human airways, acoustic pulse reflectometry has become established as a useful tool for non-invasively measuring the input impulse response, from which the internal duct dimensions can be calculated. In this thesis, the theory describing wave …
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Numerické simulace transportu a depozice vláken v zjednodušeném modelu dýchacích cest
… MMMFs (man-made mineral fibers) are harmful to human health when inhaled because of their abundance in the atmosphere, composition, and ability to penetrate deep into human lungs. It can cause lung cancer and numerous other diseases according to the severity of the exposure. To address this …
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An Investigation into Using Ultrasound for Airway Humidification
… evaporation of droplets, a key requirement for human airway humidification in therapeutic devices such as the Continuous Positive Airway Pressure (CPAP) device. The technique involves applying high-intensity ultrasound to droplets to accelerate their evaporation. The ultrasonic levitation …
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The IL-23 axis and innate immunity in the airways
… peptides, calprotectin and LL-37, in healthy human airways. Of these, only LL-37 was induced by the gram-negative bacterial stimulus endotoxin in this setting. This demonstrates the involvement of LL-37 in the innate immune response against gramnegative bacteria. Finally, we quantified …
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Exploring Ciliary Dynamics: Assessing Motility and Induced Velocity in Human Airway Cell Cultures
The human respiratory tract going from the nose to the terminal bronchioles is lined by a mucociliated epithelium. Here, cilia underpin an essential defence mechanism known as MCC. This process clears inhaled pathogens and contaminants from the airways and exhibits various degrees of complexity. …
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Mechanisms of virus infection of human airway epithelium cultured at an air-liquid interface (HAE-ALI)
ABSTRACT Polarized human airway epithelial (HAE) cultures are instrumental for studying respiratory tract diseases and gene delivery of airways. Primary epithelial cells isolated from tracheobronchial airways, grown in transwell at an air-liquid interface (ALI), undergo media-induced mucociliary …