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 321 for “"conical"”.
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Conical Diffraction Photonics
Recent interest in conical diffraction (CD) has led to a large increase in experimental and theoretical investigations over the last two decades, a marked change from the previous 160 quiet years in the field. Once dismissed as an optical curiosity, the phenomenon has emerged as a fascinating area …
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Conical shaped charges
Includes bibliographical references.
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Studies in Conical Form
The design of a conical room for experiencing a fleeting moment was developed through a series of demonstrative studies. The desired effect of a momentary appearance of a ray of light striking a reflective surface in a room based on the predicted relative position of the sun at set times determined …
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Contact stresses in conical shaped rollers
… to understand the stress distribution when two conical shaped rollers come into contact, both over their contact surface region and inside the material. One of the most important findings of this thesis is that when two conical rollers push against one another, the resulting contact patch takes …
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Axially Symmetric Deformation of a Shallow Conical Shell
Made available in DSpace on 2014-12-04T23:10:56Z (GMT). No. of bitstreams: 1 0020893.pdf: 21844008 bytes, checksum: c70acbd1bec642f883bbf8f16002e6fd (MD5) Previous issue date: 1957
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Inflated conical membrane subjected to axial compressive load
In the assumptions, it was indicated that a modification in the method of analysis would allow taking into account the variation in pressure. This could be done by assuming that the internal pressure P used in the analysis was the pressure after deformation. During deformation, the mass of the …
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A Ridge-fed Conical Horn Antenna for Small Satellites
<p>The increased popularity of small satellites such as CubeSats as an alternative vehicle for efficient and low cost space exploration has revolutionized the space research industry. The small physical size and other constraints owing to outer space applications has presented a myriad of exciting …
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Effect of conical distributors on evaporator and system performance
… of refrigerant and air in the evaporator using a conical distributor on system COP and capacity. Several conditions at the distributor inlet are varied including quality, mass flux, and orientation in gravity and the resulting superheat profiles of the evaporator circuit outlets are recorded. To …
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Three-dimensional propagation and scattering around a conical seamount
In this thesis, a numerically effcient three-dimensional propagation and scattering model is developed based on the three-dimensional coupled mode theory for axisymmetric bathymetry. The three-dimensional coupled mode approach applied in this thesis is fundamentally identical to the one applied in …
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Pronounced Absurdity: The Wedding-scape Outside a Conical Field
… of wedding infrastructures only exists in the conical field of a camera, and the dysfunctional, disordered and obscure physical reality behind a flawless wedding photo becomes a critique of visual consumerism.
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A computer model for sound propagation around conical seamounts
… sound pressure field around a penetrable conical seamount. The pressure field is generated by a harmonic point source. The seamount is positioned in a vertically stratified ocean. It is modeled as an outgrowth of the sediment layer covering the ocean bottom. First, the seamount is …
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Conical Intersections and Avoided Crossings of Electronic Energy Levels
… equations coupled by a potential admitting a conical intersection, in the spirit of Herman-Kluk approximation (in close relation with frozen/thawed approximations). Our main Theorem gives explicit transition formulas for the profiles when passing through a conical crossing point, including …
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Modelling the microclimate in a conical bottomed circular grain silo
… the air pressure field within an aerated conical bottomed circular silo, to continuing prediction the velocity field. The obtaining results are used to compute the simultaneous heat and mass transfer processes that occur in non-aerated and aerated grain silos. The conservation equations of …
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Elastic Stability of Conical Shells Loaded by Uniform External Pressure
Made available in DSpace on 2014-12-04T23:10:51Z (GMT). No. of bitstreams: 1 0006988.pdf: 2004587 bytes, checksum: 06f8705c379bd3f4b0f8525521900796 (MD5) Previous issue date: 1953
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NeXtRAD antenna design: X-Band dual polarised conical horn antenna
… antennas examined here have been the square and conical horn antennas using square and circular waveguides respectively. Each of these waveguides support dual polarisation as they provide a symmetrical structure in two orthogonal planes of polarisation. The square waveguide is flared into a …
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Supersonic conical flow computations using a rectangular finite volume method
A method is developed to solve the conical flow equations in spherical coordinates using a rectangular finite volume approach. The only mapping done is the mapping of the spherical solution surface to that of a flat plane using a stereographic projection. The mapped plane is then discretised into …
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A deployable bottom fed conical log-spiral antenna for CubeSat applications
… on a CubeSat, with the major focus on the conical log-spiral antenna (CLSA) due to its frequency independent characteristics. The antenna design will then go beyond the published works of the CLSA to introduce a new feeding concept, a bottom fed CLSA. Necessity for this feeding rises out of …
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