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 “"Zero-gravity"”.
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Vapor Bubble Detachment in Subcooled Pool Boiling at Zero Gravity
The mechanism of vapor bubble detachment at zero gravity has been studied both analytically and numerically. Instead of analyzing the force balance, this study emphasizes momentum conservation, the time integral of the force. The liquid velocity is derived from the velocity potential. Heat and mass …
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Development of zero-gravity structural control models from analysis and ground experimentation
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Some Observations on Orientation and Illusions When Exposed to Sub and Zero-Gravity
Made available in DSpace on 2014-12-05T22:14:38Z (GMT). No. of bitstreams: 1 5801734.pdf: 5005329 bytes, checksum: 9011653c58c4197331d41485eefc6e12 (MD5) Previous issue date: 1958
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Pressure drop in fully developed, turbulent, liquid-vapor duct flows at zero gravity
… pressure drop in liquid-vapor flows at zero gravity are essential to the design of two-phase thermal control and fluid transfer systems aboard spacecrafts. The present investigation is concerned with the prediction of the frictional pressure drop in steady, fully developed, turbulent …
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Modeling and modal identification of jointed space structures in one- and zero-gravity environments
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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An underwater neutral-buoyancy telerobot for zero-gravity simulation with attitude control and automatic balancing
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Design and construction of a five degrees of freedom air carriage for the SPHERES testbed
… of the formation flight algorithms in a zero-gravity environment. The remaining two are designated ground units. Their function is to provide an infrastructure where the bulk of the development and testing aspect of the algorithms are being carried out since resources are more readily …
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Projecting the uncanny : the intersection of visuality and architecture
… appropriate to describe forms and spaces in zero and artificial gravity. Its focus is on the physical forces associated with life and motion in a rotating environment and the formal and geometric architectural response to those forces. Orthographic drawing relies on a flat plane onto which …
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Numerical Modelling of Sooting Laminar Diffusion Flames at Elevated Pressures and Microgravity
… Flames display significant changes under microgravity and high-pressure conditions as compared to normal-gravity flames at atmospheric pressure, but the exact causes of these changes are not well-characterized. As such, the effects of gravity and pressure on the stability characteristics and …
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Environmental design guidelines for a second generation, LEO, permanently manned space station
… of the anthropometrics of the human body in a zero-gravity environment with a presentation of conclusions and recommendations based upon the findings. 3. A study of the physiological effects of zero-gravity on the human body with a presentation of conclusions and recommendations based upon the …
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Pursuing A More Habitable Space Module: Using Impression Based Generative Design
… with this unreasonable idea that you can fight gravity”. Yet, in a time when science fiction is becoming science fact, architects may no longer need to fight gravity. A reemerging interest in space by the general public coupled with new economic opportunities has created numerous private …
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Space Radiation Assessment and Mitigation: Meeting the Growing Demand for Shielding Solutions by Enhancing Models and Exploring Novel Shielding Opportunities
… as they explore the potential benefits of zero-gravity production environments. However, the eagerness to develop lighter shielding and the lack of consideration for existing tools and material constraints have led to a proliferation of studies advocating for shields based on incorrect or …
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Caustics in gravitational theories
… this becomes the question of whether or not gravity alters the shape that is predictedby the simple cubic which is well known from catastrophe theory. We shall refer to this as the zero gravity solution. In this thesis we present a rigorous investigation of the limiting behaviour of both the …
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Configuration Validation of a Novel In-Space Propellant Storage and Transfer System
… challenge due to high vacuum and potential zero gravity environment. In order to raise the technology readiness level of this system, experimental study was conducted on (a) system dynamics, (b) mass gauging, (c) CFD analysis. The stability dynamics study showed the system to be stable about …
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Human Serum Albumin Characterisation and Binding Studies by Spectroscopic Techniques
… 1992 report concerned HSA crystals grown using zero gravity conditions. The objective of this project is the characterisation of recombinant and native HSA using Ultraviolet (UV) & circular dichroism spectroscopy (CD) and involved HSA conformational changes, which altered the ability to bind or …
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Adaptation to a linear vection stimulus in a virtual reality environment
In the zero-gravity environment of space, the vestibular system's functioning is compromised and astronauts receive conflicting visual and vestibular cues concerning body orientation and motion. Experiment 136 on the Neurolab space shuttle mission explored this research question. The current …
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Analyzing Attitude Correction of a Spacecraft Due to the Motion of a Robotic Arm Payload
… attitude throughout robot motion, as in a zero gravity setting, any forces created by the robot act as equal and opposite forces applied to the parent spacecraft. The research performed in this thesis aims to create a model to describe changes in attitude throughout planned robot motion, as …
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Long Time Dynamics of Spherical Objects Governed by Surface Tension
… vibration of a spherical water droplet under zero gravity. The equation is legitimately referred as the capillary spherical water waves equation. We develop a toolbox for paradifferential calculus on curved manifolds and prove the local existence for this equation by para-linearizing the …
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The P. H. O. S. E. Design A Tool to Pursue Psychological Health during Long Duration Space Missions
… Not all outlets and art forms may work in a zero-gravity environment. Depending on the materials, some art mediums may even be harmful in contained environmental conditions. One of the eight main sources of mental stressors in space, identified by NASA researchers, is mission readiness. Being …
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