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 203 for “"Enclosures"”.
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Radiant heat transmission in enclosures
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1962.
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Effectiveness of smoke barriers: pressurised stair enclosures
Stair Pressurisation Systems (SPS) are a form of smoke control used in many high-rise buildings. They are designed to keep smoke out of the stairwell so that occupants have a safe evacuation route during an emergency. Throughout the years, however, many within the Fire Engineering industry have …
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Two-phase flows accompanying fires in enclosures
The dispersed phase that accompanies enclosure fires, for example, soot, ash, sprinkler droplets and extinguishing powder, could exert a significant influence on the dynamics of the background fluid. In this thesis, the results of a numerical study into the effects of this dispersed phase on the …
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Brightness and Illumination by Interreflections in Enclosures
Made available in DSpace on 2014-12-04T21:02:38Z (GMT). No. of bitstreams: 1 0007885.pdf: 8915093 bytes, checksum: 3406bbcb7458b4309c78d51a4d7b8166 (MD5) Previous issue date: 1954
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Modelling of Ignition and Fire in Vented Enclosures
Fire development in a vented enclosure can proceed in an explosive and disastrous manner called flashover. This thesis examines when, why and how flashover occurs and gives the answers in terms of a few determining dimensionless parameters. The mechanism of flashover considered in this thesis is an …
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The early Neolithic tor enclosures of Southwest Britain
Along with causewayed enclosures, the tor enclosures of Cornwall and Devon represent the earliest enclosure of large open spaces in Britain and are the earliest form of surviving non-funerary monument. Their importance is at least as great as that of causewayed enclosures, and it might be argued …
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Protection of electronics in submerged enclosures against underwater explosions
In the milieu of military sea mine design, it is often necessary to design mines that are to be placed at small distances from each other. A possible tactical purpose may require that each mine be set to explode at controlled instances in time without disturbing the operation of the other mines in …
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Adaptive Collocated Feedback for Noise Absorption in Acoustic Enclosures
… frequency acoustic energy absorption in acoustic enclosures. The specific application chosen for this work is the reduction of high interior sound pressure levels (SPL) experienced during launch within launch vehicle payload fairings. Two acoustic enclosures are used in the research: the first …
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Optimization Of Wind Fence Enclosures For Infrasonic Wind Noise Reduction
A large porous wind barrier enclosure has been built and tested to optimize wind noise reduction at infrasonic frequencies between 0.01-10 Hz in order to develop a technology that is simple, cost effective, and improves upon the limitations of pipe and porous hose arrays. The effects of varying the …
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Middle Woodland hilltop enclosures: The built environment, construction and function
… Woodland period (200 B.C.-A.D. 400) hilltop enclosures in the Ohio Valley. It describes the physical structure and temporal development of hilltop enclosure architecture and analyzes the associated activity areas. The concept of the built environment, which incorporates dimensions of space, …
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Periodic orbit analysis of the Helmholtz equation in two-dimensional enclosures
… is also noted that some mode shapes in chaotic enclosures are scarred by the short periodic orbits. This motivates the proposal of the Mode Scar Hypothesis and the Mode Resonance Function Hypothesis.The trace formula, which is a sum over periodic orbits, approximates the level density for an …
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Political ecologies of encounter: mapping enclosures and disruptions in food access
This study is an examination of the role of community-based food projects in place making and collective futuring efforts. I look specifically at food access projects in Dayton, Ohio, a city I have personal connections to. In this study, I forefront the concepts of relationality, co-creation, …
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Active control methods for improving the insertion loss of acoustical enclosures
… the implementation of passive transmission loss enclosures. An acoustical enclosure surrounds a noise source for the purpose of interrupting the noise transmission path. The effectiveness of these enclosures is, however, limited by various drawbacks. These drawbacks include leaks in the enclosure …
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Encounter with the eruv : a project towards the city of open enclosures
The thesis examines the physical and symbolic spaces of the eruv through a textual and visual engagement. An eruv is a synthetic single private domain to facilitate carrying in a city, which is otherwise only allowed within a private domain on Shabbat in orthodox Judaism. An eruv is created by …
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The Intensity of Recollection-Images in Suspicious River and The Law of Enclosures
… River (2000) and John Greyson’s Law of Enclosures (2000) appear on the surface to be concerned only with the day-to-day existence of ordinary people living in “ordinary times”. However, upon closer inspection, these Canadian productions and other similar films construct an experience of …
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Multi-attribute evaluation of materials for shielding enclosures subjected to a marine environment
The Naval Surface Warfare Center, Dahlgren Division (NSWCDD), has been tasked to design a shielded enclosure to be incorporated in an enclosed mast made of compos materials. This enclosure will house processing equipment which is known to be susceptible to electromagnetic energy. In addition to …
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Design and analysis of fiber reinforced elastomeric enclosures with application in upper arm orthosis
Fiber Reinforced Elastomeric Enclosures (FREEs) are soft pneumatic actuators that deform in a predetermined fashion upon inflation. They are constructed using a hollow elastomeric cylinder reinforced by two families of helical fibers. This thesis analyzes the deformation behavior of FREEs by …
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