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 86 for “"Non-rigid"”.
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On Non-rigid Linkages
… through which motion transmission and structural rigidity have been understood. Conventional kinematic theory assumes perfectly rigid links joined by ideal revolute joints, while structural mechanics treats bar-and-joint frameworks as load-bearing assemblies with negligible internal deformation. …
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Wetting of non rigid surfaces
… many superhydrophobic substrates comprise rigid structures on rigid substrates. The development of a thin flexible substrate would allow new avenues to be explored to fully take advantage of the non-wetting properties of superhydrophobicity. This thesis presents a novel production method …
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3D Non-Rigid Reconstruction with Prior Shape Constraints
3D non-rigid shape recovery from a single uncalibrated camera is a challenging, under-constrained problem in computer vision. Although tremendous progress has been achieved towards solving the problem, two main limitations still exist in most previous solutions. First, current methods focus on …
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Mid-level vision and recognition of non-rigid objects
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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UNDERSTANDING THE STRUCTURE AND CORRELATES OF NON-RIGID SPATIAL SKILLS
We developed and tested a novel measure of non-rigid, ductile spatial skill using knot reasoning. In Study 1, 279 US adults (M = 30.90 SD = 5.47 years; 76% White, 48% women) recruited through Prolific completed a 73-item knot reasoning task. Using Item Response Theory, we tested the reliability of …
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A non-contact end effector for robotic handling of non-rigid materials
… are not applicable, because, non-rigid food products have somewhatunpredictable and unstable behaviour characteristics which arises from their natural physicalproperties.The main aim of this project was to develop a novel non-contact end effector that canhandle non-rigid …
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High-resolution infrared spectroscopic study of the non-rigid radicals HCCN and DCCN
… spectroscopic work to cover much larger and more non-rigid species. A similar attempt was made a decade ago; however, the prototype was not sufficiently reliable to pass the testing stage. This project expands on our previous effort and focuses on designing a more reliable and better-performing …
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A Value Approach To Complex System Design Utilising A Non-Rigid Solution Space
… as requirements constrains the designer to a rigid solution space, which may not include the “best” solution for the stakeholder. Similarly not including the social aspects within a value model causes the designer to make poor value trades. To overcome these problems the VSSD technique …
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Incorporation of diffusion tensor MRI in non-rigid registration for image-guided neurosurgery
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
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The role of external non-rigid ankle bracing in the prevention of inversion injuries
… study was to measure the effectiveness of the non-rigid, Subtalar Stabilizer (STS) ankle brace under conditions similar to an unexpected fall which inextreme circumstances could lead to a lateral ligament injury. The "calcaneal inversion" angles, times, and forces were measured when the …
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Non-rigid registration of mammogram images using large displacement optical flow with extended flexibility for manual interventions
This thesis presents a registration method for mammogram images with extended flexibility for manual inputs from medical specialists. The algorithm was developed as part of the Mammography project led by Professor. Regina Barzilay at MIT CSAIL. Given a sequence of mammogram images, the algorithm …
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A comparison of analytical models and experimental results for the acoustic response in a non-rigid-wall enclosure
… modeling approach for the acoustic response in a non-rigid-wall enclosure. The acoustic response in any enclosure is determined by the boundary conditions at the interior surface of the enclosure walls, and the types of sources present. The analyses presented in this thesis assumed that the …
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Compact representations for fast nonrigid registration of medical images
We develop efficient techniques for the non-rigid registration of medical images by using representations that adapt to the anatomy found in such images. Images of anatomical structures typically have uniform intensity interiors and smooth boundaries. We create methods to represent such regions …
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Geometry of Creased Shell Structures
… of deformation from facet bending, leading to non-rigid Origami. These non-rigid Origami structures offer several functional behaviours such as tunable stiffness, deployability, and shape morphing. As such, the potential use of creased shells in a range of applications is intriguing. However, …
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Identifying Response to Therapy in Longitudinal PET Imaging Studies
… scans by registering CT scans using customised rigid and non-rigid registration performed by the Image Registration Toolkit (IRTK). Registration success was assessed using qualitative visual analysis and quantitative landmark analysis on a cohort of 20 lymphoma patients. Landmark analysis …
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Virtual-Real Object Registration and Shape Completion for Stable and Accurate Augmented Reality Technology
… Thirdly, in order to improve the accuracy of rigid 3D point cloud registration, an unsupervised learning-based network (Iterative BTreeNet) has been proposed. Iterative BTreeNet has been compared with three traditional and six state-of-the- art learning-based methods and outperforms these …
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Variability in the Pinna Motions of Hipposiderid Bats, Hipposideros Pratti
… patterns fall into two distinct categories: rigid motions and non-rigid motions. In the current work, the pinna of Pratt's leaf-nosed bat (Hipposideros pratti) was used as a biological model system to understand how a sensor could benefit from variability. Hence, the variability in the rigid …
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Towards a non-invasive measurement of human motion, force, and impedance during a complex physical-interaction task : wire-harnessing
… especially physical interaction with non-rigid objects. This performance gap is ever-present in the manufacturing process known as wire-harnessing. Generally, on an assembly line, robots can be used to quickly and accurately assemble a system. However, due to the non-rigid nature of a …
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