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 15 of 15 for “"loading mechanism"”.
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Single-use lancet and capillary loading mechanism for complete blood count point of care device
… use lancet integrated with a blood collection mechanism and interface and successfully tested a prototype. High speed video was taken of lancet motion at 50,000 frames per second, and lancet velocities were found to be -11 m/s as compared to ~3m/s for a commonly used lancet. As faster lancet …
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Design and characterization of a gel loading mechanism for an ultra-high throughput mutational spectrometer
… glass capillary with a 75 m inner diameter. A mechanism was designed and tested which loaded gel into 8 channels simultaneously. The mechanism was used to test the relationship between gel loading time in relation to varied pressure and capillary length, through 45 total runs, with 8 channels …
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Manufacturing improvement and thermal property characterization of the frame structure of an Ultra-high Throughput Mutational Spectrometer
… was also modified to interface with a gel loading mechanism below, and the LED fluorescent excitation array above. The current subunit will enable the testing the complete UTMS system. In addition, an immersion heater was installed in the water-tight structure to simulate the 200 to 275 W …
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Numerical models for scoring failures of flexible metal to metal face seals
… identical rotating and stationary seals, and a loading mechanism using elastomeric rings. This thesis work is the first attempt to explain scoring failures of this unique type of mechanical face seal. Numerical models and new scoring failure criteria were developed to explain different scoring …
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Enhancement of a Rolling Resistance Rig for Force and Moment Testing of Tires
… test. Additionally, the design of a mechanical loading mechanism (used to apply normal force on the tire) in place of the previous one using dead weights is also discussed. This study also talks about the structural and vibrational finite element analysis of a tire testing machine. Since the …
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Passive phloem loading and long-distance transport in a synthetic tree-on-a-chip
According to the Munch mechanism, vascular plants rely on osmotic pressure gradients to export sugars from regions of synthesis (mature leaves) to sugar sinks (roots, fruits). A crucial step in this process is the loading of sugars from photosynthetic cells to the export conduit (the phloem). In …
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Design and fabrication of a high precision wafer polishing machine
… in mind. In addition to the upper structure, a loading mechanism was also designed for the polishing head. Two high-precision linear drive mechanisms, the z-axis and the x-axis, were designed as the two major axes of motion for this machine tool. The z-axis applies the normal polishing force of …
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Large gain amplification mechanism for piezoelectric actuators utilizing a rolling contact joint
… to use some form of displacement amplification mechanism. An efficient, heavy-duty displacement amplification mechanism for piezoelectric stack actuators is presented in this thesis. The displacement amplification gain is increased by a factor of more than 100 in a single stage by using a …
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Biomechanical Response of Human Volunteers and Surrogates in a Variety of Loading Regimes
… causes of unintentional injury for all ages. The loading mechanism that cause forces to be transmitted to the body during these events can cause a wide assortment of injury types with a range of severities. Understanding the biomechanical response to loading in these environments can facilitate …
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Exploring the mechanisms critical to the operation of metal face seals through modeling and experiments
This thesis aims to explore operation mechanisms of a special type of mechanical face seals: the flexible metal-to-metal face seal (FMMFS). Unique features of the FMMFS include much more flexibility in the circumferential than in the radial direction, identical rotating and stationary seal rings, …
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Comparative Studies of Processivity Clamp Loader ATP Site Function
… links the clamp around DNA in a multi-step mechanism. Clamp loaders are ring-shaped pentamers of AAA+ subunits. The pentamer complex contains 3-4 ATP sites, each located at the interface of two subunits. In each ATP site, an arginine residue from one subunit is located near the γ-phosphate …
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The structural interaction of pipe couplings used for trenchless construction.
… induces high stresses in the pipe and produces a loading mechanism for the structural element of the coupling system. This study has investigated the structural interaction of the pipe-packing-coupling system under installation conditions. A theoretical model for the lateral force exerted on the …
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Protein-sphingolipid interactions and their role in immunity and disease
… from defects in sphingolipid metabolism. Lipid loading onto CD1d is facilitated by the lysosomal lipid transfer protein Saposin B, but the lipid loading mechanism is unknown. I used a range of highly sensitive biochemical assays to probe the interaction between CD1d and SapB. Interestingly, no …
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Dissection of phloem transport in cucurbitaceae by metabolomic analysis
… and perplexing questions relating to the phloem loading and transport mechanisms of Cucurbita maxima, by combining metabolomic analysis with cell biological techniques. This putative symplastic loading species has long been used for experiments on phloem anatomy, phloem biochemistry, phloem …
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Halloysite for smart nano-structured materials in sustainable applications
… of halloysite, which is at the basis for the loading mechanism of guest molecules inside its inner volume. By using Knudsen Thermogravimetry, it was found that the confined solvent exhibits a vapor pressure larger than the bulk solvent and, consequently, a faster evaporation rate. In …