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.
Results
Showing 1 to 20 of 89 for “"Crawling"”.
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Network Sampling through Crawling
… consider the problem of network sampling through crawling, in which the data collectors have no knowledge of the network of interest except the identity of a starting node. The data collector can expand the observed sample by querying an observed node. While the network science literature has …
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Intelligent Event Focused Crawling
There is need for an integrated event focused crawling system to collect Web data about key events. When an event occurs, many users try to locate the most up-to-date information about that event. Yet, there is little systematic collecting and archiving anywhere of information about events. We …
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Query selection in Deep Web Crawling
… integrated environment. Unlike the surface web crawling where pages are collected by following the hyperlinks embedded inside the pages, there are no hyperlinks in the deep web pages. Therefore, the main challenge of a deep web crawler is the selection of promising queries to be issued. This …
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A Bandwidth-Conserving Architecture for Crawling Virtual Worlds
… integrate the 3D data we can also improve the crawling and searching efficiency and accuracy by avoiding crawling unchanged regions or downloading unmodified objects that already exist in our collection. This will help to save bandwidth resources and Internet traffic during the content …
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Essays on the crawling-peg and stabilization policy
This thesis is made up of four self-contained essays, two referred to short-run stabilization issues, one referred to long-run policy and one of a more atemporal nature.
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Mechanical design of a Stewart platform-based crawling vehicle
… thesis presents a design for a caterpillar-like crawling vehicle. An overview of the effort to develop walking vehicles is included to show the depth of interest in developing a vehicle capable of traversing rough terrain. A general overview of crawling vehicle objectives and the control problems …
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Conceptual Design and Simulation of a Multibody Passive-Legged Crawling Vehicle
… The passive-legged design is termed a "crawling" vehicle, to differentiate it from "walking" vehicles, which have powered legs. A conceptual design for the proposed vehicle was developed using insights from observations of caterpillar specimen geometry, gaits, leg trajectories, and …
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A Novel Hybrid Focused Crawling Algorithm to Build Domain-Specific Collections
… technique, to the traditional focused crawling process, to overcome the above mentioned problems and to improve performance. We proposed a novel hybrid focused crawling framework based on Genetic Programming (GP) and meta-search. We showed that our novel hybrid framework can be applied …
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Design and control of an origami-enabled soft crawling autonomous robot (OSCAR)
… navigation for a novel origami-enabled soft crawling autonomous robot called OSCAR. In order to implement autonomous navigation, it first mitigates the OSCAR’s motion uncertainties by a multi-step iterative design process. Analysis has shown that OSCAR’s motion uncertainties are the result …
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Analysis of the swimming-to-crawling transition of Caenorhabditis elegans in viscous fluid
… two distinct gaits - swimming when in fluids and crawling when on surfaces. Swimming is characterized by about a twice greater wavelength and about four time greater frequency of undulatory waves, compared with the crawling gait. These mechanisms which generate these gaits are not well-understood …
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Crawling Pattern Movement Effects on Fine Motor Skills among Children with Autism Spectrum Disorder
… of this project was to test the effects of a crawling program on the fine motor skills of children (ages 7-19) with ASD. A partial lag design approach was used in order to test 50 children who have been diagnosed with ASD. These 50 participants were randomized into experimental and lag control …
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The effect of sublethal concentrations of selected toxicants on the negative phototactic response of Dugesia tigrina
… studies. After acclimation to total darkness, crawling speed away from a beam of light was measured in the controls and the experimentals at 24, 43, and 96 hours. There were significant differences between the lowest sublethal concentrations and the highest sublethal concentration used in these …
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Flow-induced mechanotransduction in cell-cell junctions of endothelial cells
… shortly after the onset of laminar flow: their crawling speed decreases ~40% within the first 30 min, but only in a confluent monolayer of endothelial cells, not in subconfluent cultures, where cell-cell interactions are limited. This led us to study early shear effects on cell-cell adherens …
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The Role of Infant Locomotor Onset in Shaping Mother-Infant Communication
… particularly in distal contexts. Mothers of crawling infants more frequently used distraction and negative affect to regulate their infants' unacceptable behavior than mothers of non-crawling infants. This difference in maternal behavior corresponded with the tendency for crawling infants to …
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Assessment of spastic patients before and after selective posterior lumbar rhizotomy
… In order to be as objective as possible, crawling and gait analyses were done in addition. All the patients were assessed clinically two days prior to surgery and then between four and fourteen months after surgery. For both preoperative and postoperative assessments, resistance to passive …
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Design and control of Supernumerary Robotic Limbs for near-ground work
… two torso-mounted limbs that support the body in crawling- and kneeling-like positions, such that the wearer's natural arms are free to do useful work near the ground. First, the concept and its motivations are discussed, followed by a biomechanical analysis of the human-robot system. Two …
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Efficiency and Motor Skill Learning (Locomotion, Physical, Physiology, Evolution, Practice)
… using 5 physically fit adult male subjects crawling on a horizontal motor-driven treadmill at .76 m/s. E% was the ratio of the work output of individual limb segments, based on a link segment model, to metabolic energy expenditure measured using indirect calorimetry. A repeated measures …
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Scripts in a Frame: A Framework for Archiving Deferred Representations
… perception.</p> <p> We propose a two-tiered crawling approach that enables crawlers to capture embedded resources dependent upon JavaScript. Measuring the performance benefits between crawl approaches, we propose a classification method that mitigates the performance impacts of the two-tiered …
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Localization of a robotic crawler for CANDU fuel channel inspection
… discusses the design and development of a pipe crawling robot for the purpose of CANDU fuel channel inspection. The pipe crawling robot shall be capable of deploying the existing CIGAR (Channel Inspection and Gauging Apparatus for Reactors) sensor head. The main focus of this thesis is the …
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Rheology of complex fluid films for biological and mechanical adhesive locomotion
… walk across ceilings. These animals stick to the crawling surface by excreting a thin layer of biopolymer mucin gel, known as pedal mucus, and their acrobatic ability is due in large part to the theological properties of this slime. The primary application of the present research is to enable a …
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