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 189 for “"free-standing"”.
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Raman scattering in free standing porous Si films
In this thesis, Raman Scattering of free standing porous silicon on sapphire samples of controllably varying porosity is studied. The free standing, fully crystalline porous silicon films were prepared by electrochemical etching and the porous structure were lifted-off by a procedure based on …
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'Becoming mother': An ethnography of a free-standing birth centre
… and practices around the birth process within a free-standing midwifery-led birth centre (FSBC). It was done to shed light on the workings of this little known model of maternity service provision and to build on the small amount of qualitative research in this field to date. Using ethnography, I …
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NANOPATTERNING OF FREE-STANDING VAN DER WAALS HETEROSTRUCTURES USING CHARGED PARTICLES
… we demonstrate selective nanopatterning of free-standing hBN-encapsulated graphene and semiconducting TMDs using focused helium ion beams. By leveraging differences in electronic and nuclear stopping powers, we achieve layer-specific modification where the active layer (graphene or TMD) is …
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Investigation of the Behavior of Free-Standing Gabions in Seismic Regions
<p> This thesis investigates the behavior of free-standing gabion walls in areas of mild seismicity. To investigate this behavior, three walls of varying internal cable patterns were constructed at a quarter-scale. These walls were tested with a mass shaker, and mode shapes, tone extractions, and …
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Free-standing 100 nm period gratings produced by achromatic holographic lithography
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Fabrication of stress controlled silicon oxide for free- standing MEMS Devices
… grating, structural failure of the thin self-standing grating membrane posts a challenge for manufacturing yield. The major risk comes from the strongly compressive stressed buried oxide layer that creates loading to the thin silicon grating membranes. In an effort to find a solution, a …
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Design, fabrication and characterisation of free-standing thick-film piezoelectric cantilevers for energy harvesting
… thick-film structure in the form of a free-standing cantilever incorporated with piezoelectric materials is proposed. The advantages of this structure include minimising the movement constraints on the piezoelectric, thereby maximising the electrical output and offering the ability for …
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Electrostatic deflection of free-standing tungsten microbridges as a novel means for characterization of thin film mechanical properties
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.
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Engineering arterial substitutes that recapitulate vessel microstructure and mimic native physiological responses
… the controlled assembly of vascular cells and free-standing collagen sheets of controlled fibril orientation in a manner that recapitulates native vessel microstructure. We first present a scalable and continuous strategy for generating strong, free-standing, ultrathin, and centimeter-wide …
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Modeling the Stimulation of Vestibular Hair Cell Bundles Using Computational Fluid Dynamics and Finite Element Analysis
… fluid-flow only (physiologic for free-standing bundles), and combined loading (physiologic for bundles with tip attachments) conditions to determine how the bundles behaved in each case. The bundles differed in the heights of their components, their length and width, and their …
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Remote epitaxy of III-N membranes on amorphous boron nitride
… enhance the manufacturing efficiency of the free-standing GaN film. Surface acoustic wave (SAW) strain sensor fabricated by free-standing ultrathin single crystalline GaN film shows good performances. Process to solve GaN device heat dissipation is presented. Relaxed InGaN film grown on aBN …
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Mechanical testing of solid materials at the micro-scale
… micro-scale requires a sound theoretical understanding and reliable experimental data on the mechanical behavior of materials at that scale. Generation of experimental data requires accurate, robust, reliable, versatile and yet simple micro-scale mechanical testing devices. This thesis …
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Membrane transfer process for the creation of low-noise solid state nanopore devices
… is particularly attractive because it is label-free, rapid, and intrinsically single molecule. However, the ability to infer molecular properties with nanometer precision, either in size or sequencing, is obscured by noise in the measurement. The precision of this inference can be significantly …
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Thermal and Mechanical Stability of Nanograined FCC Metals
… evolution of nanograined face-centered cubic free-standing thin films under thermal and mechanical loading, while also raising many previously unaddressed questions on the active mechanisms under these loads.
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Efficient Bundling and Unbundling of Hospital Services: An Examination of Scale and Scope Economies in the Hospital Industry
… currently engaged in a process of establishing free standing facilities for the treatment of certain patients, such as emergency or outpatient surgery clinics. This "unbundling" of services from the traditional hospital setting has motivated researchers to study the production technology of a …
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Low temperature bulk modulus of solid argon
The lattice parameter of a free-standing argon crystal has been measured as a function of pressure at constant temperature using a high precision back-reflection X-ray camera. Low temperature measurements, using helium as the pressure transmitting fluid, are reported which cover the pressure range …
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Chemistry and Measurement at Aqueous Nanoscale Interfaces
… polyamide membrane active layers using a support-free approach and examines the effect of monomer concentration on the morphology, water sorption, longitudinal elastic constant, and thermal transport properties of the film. Although these two areas do not have significant overlap, interfaces play …
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H-reflex changes with loading and unloading
… Stresses on the spine vary during lying, standing, weight lifting and unloading. This may influence the H-reflex. The purpose of this study was to measure the changes that might occur in the soleus H-reflex during such loading and unloading conditions. Twenty healthy volunteers (20-50y) …
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Analysis of blast mitigation strategies exploiting fluid-structure interaction
… However, there is currently a limited understanding of the mechanisms of loading, damage and failure of structures, and injury to humans produced by blast. This thesis seeks to advance our current understanding of the mechanisms of blast loading on structures. Towards this end, a …
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