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 22 for “"flatbed"”.
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The influence of channel-skewed bedforms on flow structure in a high-amplitude meandering channel
… Laboratory. The first consisted of a flatbed condition with rectangular walls and served as a control for subsequent experiments as well as for comparison to previous studies. The second substrate included a simplified synthetic point bar and the third consisted of the synthetic point …
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Analysis of air-void system in hardened concrete from a three-dimensional perspective
… the measurement of air voids by using a flatbed scanner for image acquisition, applying new methods for segmenting the image, and using new ideas for the analysis of the image data. The cement paste is protected when an air bubble is close enough in proximity to relieve the stress created …
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Super Absorbent Polymers (SAPs) as physical air entrainment in cement mortars
… system was investigated using a high resolution flatbed scanning and image analysis. One-dimensional water absorption decreased with increased SAP dosage suggesting that SAP would not increase degree of saturation during freezing and thawing. Various dosage rates and conditions of SAP were able …
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CRT LIGHT-HEAD FOR AN AUTOMATIC DRAFTING SYSTEM
… system intended for the preparation of maps on a flatbed drafting table. A CRT light-head, mounted in place of the normal optical-mechanical light-head on a drafting table, enables the production of a wide range of symbolized line features as well as symbols and names. The image on the CRT, which …
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A CARTOGRAPHIC OPTICAL CHARACTER RECOGNITION SYSTEM
… values. The system consists of a precision X-Y flatbed transport, a vidicon camera, a PDP 8/e minicomputer, an interactive display console and asso-ciated software and hardware. After investigating numerous recognition algorithms, three were finally chosen to be included in the system. The final …
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The effects of geometrical changes on airflow of developing-world solar fruit dryers
… changes in dryer geometry on the air flow within flatbed solar dryers. The interior of a dryer was simulated using Ansys Fluent, and air flow velocity and patterns were observed as the dryer's length, width, and height were varied. It was found that a small fan placed at the dryer's entrance …
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Buckling and friction-based linear motion clutch with application to medical devices
… method to measure the tube geometry using a flatbed scanner was developed and studied. This method was found to provide excellent accuracy and repeatability for measuring tubes, and has shown potential as a measurement method for many other applications.
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intersect/surface/body: A Choreographic View of Drawing
… horizontality through Steinberg’s notion of the ‘flatbed picture plane’ (1972) which informs a choreographic view of drawing in relation to orientation and surface distribution. The thesis is further contextualised through a consideration of the choreographic conditions presenting in performance …
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Free4orm framing : high-performance bending-active strip construction
… are near market, and the local availability of flatbed machining increases with each new makerspace. Thus, this thesis proposes using simple cutting and bending operations, site-applied attachments, and granulated insulation to produce permanent, freeform, stressed-skin formwork (which is herein …
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Finite element modeling of high frequency irreversible electroporation
… pulse number (25 – 75). Following experiments, a flatbed scanner was used to acquire images of the visibly discolored tissue, which has been previously shown to be indicative of the ablation pattern. The experimentally observed ablation zones were then compared to model-predictions by using image …
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Black-box printer models and their applications
… (Epson America, Inc., Long Beach, CA, USA) flatbed scanner operated at 2400 dpi under different analysis resolutions. The experiment results show that the larger neighborhood models yield a significant improvement in the accuracy of the prediction of the pixel values of the printed halftone …
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The Relative Contribution of Hudson River Tributaries to River Herring Spawning Dynamics
… ovary egg contents using an Epson Perfection V19 flatbed scanner and ImageJ software allowed for fecundity analysis. Standardized river herring standing egg crop (mean egg count per female) was multiplied by female river herring population estimates, obtained from Delta Vision HD underwater camera …
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Advances in measuring parameters of the air-void system in hardened concrete
… are used to characterize the air void system. A flatbed scanner is used to acquire a single high resolution image of the polished surface of a concrete sample. The concrete surface is polished and treated with phenolphthalein and orange powder to facilitate segmentation of air bubbles, paste and …
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Purification and characterization of Clostridium perfringens iota toxin
… IEF, Sephadex G-100 gel filtration, and flatbed electrophoresis to yield a 12 and 5% final recovery of i<sub>a</sub> and i<sub>b</sub>, respectively. Each protein was homogeneous by SDS PAGE, gradient PAGE, and crossed IEP using homologous antiserum. There was at least an 8 fold increase …
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Microstructure characterization of foamed cement and concrete
… ASTM C457 were also estimated using an automated flatbed scanner method. There was no significant change in the spacing factors of the concrete mixtures subjected to vibration, indicating the robustness of the air-void system. The results also showed strong correlation on the air content and …
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Development of image analysis techniques to assist evaluation of both air void structure and aggregate shape factors in concrete
… have been mechanically rolled above a modified flatbed desktop scanner driven by the crosshead so as to align directly above the cold cathode fluorescent (CCF) light source and the scanning charged coupled cross-head image recording device. A method of assessing the amount of voidage found …
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MicroRNA Gene Expression States Underlying Individual Variation in Aging and Lifespan in Isogenic C. elegans
… microscopy, custom software, and modified flatbed scanners to screen thousands of individual animals in parallel. We found that our methods consistently select mir-71, a known biomarker of lifespan, as a positive hit. Furthermore, our workflow is generalizable to any number of lifespan or …
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Colorimetric sensor array for identification of fungi & ultrasonic spray synthesis for supercapacitor materials
… (~$3 for each test kit using an ordinary flatbed scanner) allows for real-time identification of fungi in culture. We expect this is the first step in the development of a rapid, facile, and low-cost tool for diagnosis of fungal infections with potential additional applications for …
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The Long-Rage Directional Behavior of the Nematode C. Elegans
… an imaging setup employing an array of consumer flatbed scanners. We have confirmed quantitatively the results obtained with the scanner-array setup with a camera imaging setup, in a more stringently homogeneous environment. Wild-type worms display striking behavior in the absence of food. The …
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Development of a Heavy Truck Vehicle Dynamics Model using Trucksim and Model Based Design of ABS and ESC Controllers in Simulink
… for the tractor, a 2s2m ABS system for the flatbed trailer was created and implemented. For the ESC model, the tractor axles were equipped with disc brakes and trailer axles were equipped with drum brakes.The ESC model was then validated with the field test data by performing various dynamic …
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