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 30 for “"confined space"”.
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Confined space fatalities
… difficult to identify information pertaining to confined space fatalities such as contributory factors, mechanisms of injury and other data of an epidemiological nature.
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Polymerization in Confined Space
Polymerization of acrylamide in confined space was studied. The system used for the polymerization was a colloid of water/SDS/dodecane/pentanol. The colloidal was stable through the polymerization process only at specific compositions. The system revealed a lamellar water structure which housed the …
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Sound power measurement in a semi-confined space,
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1971.
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Turbulent convection from an area source in a confined space
The study of turbulent convection is fundamental to our understanding of many flows that occur in the natural and built environment. This dissertation focusses on the density stratification produced by a turbulent lazy plume that is formed by the release of buoyant fluid from a circular source in a …
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Development of safety health monitoring device to prevent and control risk in confined space
IoT (the Internet of Things) has become an interesting topic in the field of technology research. It is basically connected to each other through the Internet from the device. We usually think of IoT in terms of independent cars and smart homes, but some of the best applications of Internet …
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Enabling dense spatial reuse in millimeter-wave networks
… to allow many links to operate in parallel in a confined space and scale the wireless throughput with the number of clients. Results from three millimeter wave testbeds show that BounceNet can scale the throughput with the number of clients to deliver a total network data rate of more than 39 …
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Removal of interference inherent in the lens radar system
… the receiver. Since the system was operated in a confined space (the wind-wavetank), multipath was found to generate interference signals. The multipath interference was reduced via strategic placement of radio frequency absorber. A comparison was made between experimental results with the …
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Dynamics of buoyant releases in confined spaces.
… of a buoyant fluid from a small source in a confined space are varied and complex, depending on the source characteristics, the confining geometry and container ventilation. Previous work has generally been based on the 'filling-box' model (Baines & Turner 1969). This model, however, may only …
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The role of Wnt signalling during embryonic salivary gland development
… in order to maximise its surface area within a confined space. During salivary gland development, alongside branching morphogenesis occurs lumen formation, which corresponds to the cavitation of the inside of the epithelial branches to form ducts. Branching and canalization take place in a …
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Fabrication and characterization of nanofluidic channels for studying molecular dynamics in confined environments
… study of molecular and fluidic transport in confined space. It is found that the fabrication of nanofluidic channels using PDMS substrate is generally limited to the thickness of -100 nm because of the softness of the materials. Also, the gas permeability of PDMS poses a significant challenge …
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Compressive stress enhances coordinated migration of mammary carcinoma cells
… cell proliferation of a solid tumor in a confined space not only creates well-studied oxidative stress (hypoxia), but also generates growth-induced mechanical stress (compression). However, the importance of such compressive stress in tumor biology has been largely ignored. Our lab has …
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Design of a Pneumatic Tool for Manual Drilling Operations in Confined Spaces
… actuated, manually-operated tool for confined space drilling operations. The purpose of this device is to back-drill pilot holes inside a commercial airplane wing. It is lightweight, and a “locator pin” enables the operator to align the drill over a pilot hole. A suction pad stabilizes …
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Development of dielectric elastomer actuators for MRI devices
… tool, but treatment is limited because of the confined space and compatibility issues. It has been well recognized that its value would be increased if it were possible to physically manipulate objects within the MRI machine during imaging, but conventional manipulation systems cannot operate …
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Expansiveness and Security Through Materials and Design
… comfort and efficiency in a relatively confined space. Because of its narrow floor plan, the windows are made large to make the rooms seem bigger and frame the view to the outside by drawing the viewerâ s eye out from the dense interior creating expansion to the outside. The orientation …
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A Multifaceted Phenomenon of Hydrophobic Effects: Insights Learned from Nucleation Algorithm Based Computer Simulation Approach
… association behaviors of a methane pair confined into a nanometer sized hydrophobic cavity have been investigated. Our new approach demonstrates that the association behavior between two methane molecules is enhanced under confined environment rather than in bulk water. This association …
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Lymphatic pathophysiology of tumors
… by the proliferation of cancer cells in a confined space compress lymphatic vessels in tumors. The mechanical forces inside of the tumor were reduced by the selective killing of human cancer cells grown in mice by Diphtheria Toxin. Tumor cell death leads to an increase in the fraction of …
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Chemical Manipulation of Honey Bee Behavior
… to bees and inhibit the feeding of bees within a confined space. Additionally, the pheromonal compounds and the HCAs are as efficacious as DEET in deterring bees from treated food sources. The HCA piperidine was observed to effectively deter bee foragers from a sugar feeder in a high-tunnel …
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Multiphase Fountains
… or particles. In chapters 2 and 3 we consider unconfined bubble fountains. We begin by investigating the maximum depth reached by bubbles in turbulent water jets issuing downwards into a reservoir. We compare the experimental data with a theoretical model based on the conservation of volume, …
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Electrochemical Carbon Dioxide Reduction for Renewable Carbonaceous Fuels and Chemicals
… we see a lot of opportunities for catalysis in a confined space due to their tunable microenvironment and active sites on the surface, leading to a broad spectrum of electrochemical conversion schemes. Herein, we reveal fundamental concepts of confined catalysis by summarizing recent experimental …
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Particle swarms in confining geometries
… that a finite fracture allows fluid to exit the confined space and requires that fluid re-enter at a different location. This creates global scale fluid flow that interacts with particle swarms in ways that are impossible if the fracture has infinite length. ^ The experimental results demonstrate …
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