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 2948 for “"trajectories"”.
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Edited trajectories
… the practice of invention. Carlo Goldoni Edited Trajectories is an exploration into the immaterial components of architecture- time and space- in search of the architectonic event. This research is constructed around an exploration of little known, neglected and marginal spaces on the MIT campus. …
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Palliative Care Consultation Trajectories
In 2008, the Veterans Association: VA) mandated that all VA hospitals have a palliative care consult team: PCCT) to provide services to veterans with life-limiting illness. PCCTs within the VA are new, so little is known about their efficacy and utilization. The purpose of this study is to examine …
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Incremental clustering for trajectories
… An incremental clustering framework for trajectories is proposed in this paper. It contains two parts: online micro-cluster maintenance and offline macro-cluster creation. For online part, when a new bunch of trajectories arrives, each trajectory is simplified into a set of directed line …
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Three-dimensional aerodynamic trajectories
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1952.
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Optimum retro-thrust trajectories
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1960.
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Optimal trajectories for hypervelocity flight
This thesis discusses optimal trajectories for hypervelocity flight of interest in aeroassisted orbital transfer. Both coplanar orbital transfer and noncoplanar orbital transfer are studied. For these cases, the GEO-to-LEO transfer, the HEO-to-LEO transfer, and the LEO-to-LEO transfer are …
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Multidimensional Spectra from Classical trajectories
… only requires propagation of quantized classical trajectories. Here we have extended the OMT approach to the treatment of two dimensional electronic spectroscopy (2DES) for systems with multiple interacting discrete electronic states. The OMT approximation is further extended for relatively new …
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Learning Trajectories Toward Energy Understanding
… and the subsequent reconstruction of learning trajectories. Across four publications, this dissertation examines how an instructional unit can be both engaging and used for assessment. Approaches for reconstructing and analyzing learning trajectories were evaluated. The trajectories were also …
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Minimum impulse three-body trajectories.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1973.
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Singular optimal atmospheric rocket trajectories
Singular subarcs arise in quite a few problems of flight dynamics. The present study is devoted to the specific problem of ascent and acceleration of a vehicle in atmospheric flight in which a variable-thrust arc forms a part of the optimal trajectory. A two-parameter family of singular arcs was …
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Entry-based Planning of Neurosurgical Trajectories
… was evaluated by calculating the portion of trajectories still feasible after incorporating uncertainty, and by comparing the calculated average catheter length to the typical catheter length measured in ventriculostomy studies. Results There was no significant difference in hit rate (HtR) …
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Bohmian Quantum Mechanics with Quantum Trajectories
… on the propagation of those probability density trajectories. The quantum trajectory method gives rise to, for example, an authentic quantum electron transport theory of motion to, among others, classically-minded applied scientists who probably have less of a commitment to traditional quantum …
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Interplanetary Ridesharing: Exploring Potential CubeSat Trajectories
<p>Ever since the revolutionary CubeSat form factor took hold in the Aerospace industry, there has been a desire to send them further and further into space. This thesis introduces an optimization approach to deployment that explores new possibilities of interplanetary CubeSats. In this approach …
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HIV Identity Trajectories and Social Interaction
The experience and expression of social identity for people living with HIV involves processes that affect, and are affected by, communication and psychological variables. As an exploration of how people relate to HIV as a social identity and the implications this may have for social interaction, …
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Studying rule trajectories in reddit communities
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
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Trajectories of Innovation: Measurements, Models & Interventions
… begins by synthesizing views about innovation “trajectories” from the systems engineering, scientometrics, evolutionary economics, operations research, and political economics literatures. Using these views as a baseline, this thesis derives proof-of-concept methods to trace technological …
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Modelling prognostic trajectories in Alzheimer’s disease
… to build predictive models of patient disease trajectories in the earliest stages of AD. Specifically, to exploit the multi-dimensionality of biomarker data, we used a novel feature generation methodology Partial Least Squares regression with recursive feature elimination (PLSr-RFE). This …
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Optimal trajectories for maneuvering reentry vehicles
… maneuverable re-entry vehicles that can fly trajectories that have stringent path and terminal constraints, including those that cannot be written as drag or energy constraints. This work presents a method based on trajectory optimization techniques to assess the capabilities of the re-entry …
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Optimizing robot trajectories using reinforcement learning
The mapping problem has received considerable attention in robotics recently. Mature techniques now allow practitioners to reliably and consistently generate 2-D and 3-D maps of objects, office buildings, city blocks and metropolitan areas with a comparatively small number of errors. Nevertheless, …
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The Geography of Juvenile Crime Place Trajectories
The crime drop of the 1990s has been the subject of a large body of research, which has suggested juvenile crime was the major source of this decline. However, a satisfactory explanation for the crime drop remains elusive. While most of the work has focused on longitudinal studies of the …
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