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Articles 1 - 4 of 4
Full-Text Articles in Mechanical Engineering
Controlled Guidance Of Light In Large Area Flexible Optical Waveguide Sheets, Chloë O. Nicholson-Smith
Controlled Guidance Of Light In Large Area Flexible Optical Waveguide Sheets, Chloë O. Nicholson-Smith
Electronic Thesis and Dissertation Repository
Large surface area, thin, polymer optical waveguides are an emerging technology that enable a wide variety of light collection and illumination systems to be created for passive lighting, solar collectors, and safety lighting for motorized vehicles. This research builds on design of rigid concentrator and diffuser waveguides, proposing and evaluating modifications for the design of a flexible waveguide combining both concentrating and diffusing functionalities. The waveguides are thin, mechanically flexible sheets with thicknesses in the range of mm, and active surfaces from a few cm2 to several m2. Regions of the functional surface are designed to act …
Parametric Design, Modeling, And Optical Evaluation Of Retroreflective Prismatic Structures, Sama Hussein
Parametric Design, Modeling, And Optical Evaluation Of Retroreflective Prismatic Structures, Sama Hussein
Electronic Thesis and Dissertation Repository
Retroreflectors (RR) are defined as passive optical structures that redirect incident light to its originating source. Specific types of retroreflectors called inverted cubes (ICs) function through total internal reflection (TIR) and are used in various applications such as measurement tools, traffic signs and automotive rear and side lighting. This thesis aims to model, analyze, fabricate and study a novel type of IC retroreflectors called right triangular prism (RTP). A parametric approach is used to model existing IC geometries from a generic unit cube and is then implemented to model the novel RTP geometry. Those elements are then tested by optical …
Numerical Investigation Of Full Scale Thunderstorm Downbursts: A Parametric Study And Comparison To Meteorological Model, Christopher Oreskovic
Numerical Investigation Of Full Scale Thunderstorm Downbursts: A Parametric Study And Comparison To Meteorological Model, Christopher Oreskovic
Electronic Thesis and Dissertation Repository
A series of Large Eddy Simulations using an atmospheric meteorological cloud model have been used to investigate the important geometric and thermal parameters that influence a thunderstorm downburst outflow, as it pertains specifically to the idealized cooling source model. A separate set of Large Eddy Simulations make use of the same idealized cooling source model, in a realistic atmospheric base state using real field sounding data, in an attempt to make a quantifiable comparison to a downburst from a full cloud simulation. Randomness has been added to the cooling source forcing function to mimic the thermal variation in a real …
Development Of An Autonomous Robotic Mushroom Harvester, Nikita Alexeevich Kuchinskiy
Development Of An Autonomous Robotic Mushroom Harvester, Nikita Alexeevich Kuchinskiy
Electronic Thesis and Dissertation Repository
The process of development of a new robot is one of the modern technological arts. This process involves multiple complex steps and recursive approach. In this project, a solution for automatic harvesting of mushrooms is developed. In order to design an effective solution, it is necessary to explore and take into consideration the limitations of grasping very soft and fragile objects (particularly mushrooms). We will elaborate several strategies of picking and analyze each strategy to formulate the design requirements, develop a solution, and finally, evaluate the efficiency of the proposed solution in actual farm conditions for real mushrooms. The mushroom …