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 27 for “"scanning techniques"”.
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Broadband Approaches And Beam-Scanning Techniques For Reflectarray Antenna
… drawbacks, such as limited bandwidth and scanning range, which are targeted in this dissertation. At first, the array theory approach for radiation analysis of reflectarray antennas is described and implemented. Numerical results are then presented and compared with reference results to …
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Microwave Lens Designs: Optimization, Fast Simulation Algorithms, and 360-Degree Scanning Techniques
… support low-phase error, wideband, wide-angle scanning, and true-time delay (TTD) beam forming. They provide ideal performance for applications such as satellites, remote-piloted vehicles, collision-avoidance radars and ultra-wideband communications systems. The emerging printed lenses in …
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Multiphysics Modeling Of Devices For Whole Organ Healthcare Applications
… 3-dimensional objects. This thesis established a scanning procedure to engineering 3D digital model for whole organs, known as template engineering. The resultant scanning data enabled designing, manufacturing, and modeling of novel organ healthcare devices. Specifically, we applied template …
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Children with specific learning difficulties of mathematics and reading: behavioural, emotional, and social problems : and research portfolio
… neuropsychological and behavioural measures and scanning techniques can be necessary to identify the likely cause for appropriate remediation and intervention. There is increasing evidence for three main subcategories of learning disabilities which approximate closely to the ICD-10 (1992) …
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A Preliminary Investigation Comparing Craniofacial Metric Measurements and 3D Virtual Measurements
The development and advancement of new laser scanning techniques enables the capture of 3D imaging which can be quantitatively assessed for use on the human skull. I used a Polhemus Fast Scan Scorpion scanner to scan 8 skulls and evaluated the standard 24 metric measurements in Delta analysis …
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Detection and characterization of impact damage in carbon fiber aircraft fuselage structure
… grow in the aviation industry, damage detection techniques need to be developed and tested. Impact damage on aluminum aircraft structures can be detected from obvious surface indications. This is not the case in composite aircraft structure. Large interply delaminations and substructure …
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Evaluation of Radiobiological Effects in Intensity Modulated Proton Therapy : New Strategies for Inverse Treatment Planning
… clinical relevance of a variable RBE for beam scanning techniques, new strategies for the evaluation of radiobiological effects and for the incorporation of the RBE into the inverse planning process are presented. These strategies are based on a fast algorithm for three-dimensional calculations …
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Corrosion behaviour of welded joints within chloride and chloride/CO[2] environments.
… using both traditional and novel electrochemical scanning techniques within two different chloride environments. Corrosion tests were conducted using DC steady state and scanning electrochemical techniques. These tests consisted of linear polarisation resistance (LPR), corrosion potential (Ecorr)} …
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An investigation into the complementary capabilities of X-ray computed tomography and hyperspectral imaging of drill core in geometallurgy
… rapid, and inexpensive automated scanning techniques such as 2D hyperspectral imaging (HSI) and 3D Xray computed tomography (XCT) have the potential to be incorporated into the machine learning dataset. Hyperspectral imaging is a critical component of continuous drill core scanning …
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Development and Demonstration of a In-Vehicle Lane Departure and Advanced Curve Speed Warning System
… LDWS use different image processing or optical scanning techniques to detect a lane departure. In case of LDWS, these systems have some limitations such as harsh weather or irregular lane markings can influence their performance. Other LDWS use GPS receiver with access to lane-level resolution …
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Reconstruction and analysis of dynamic shapes
… set of surface points. On the other hand, 3D scanning techniques digitize complete surfaces of static objects, but are not applicable to moving shapes. I present methods that overcome both limitations, and can obtain the moving geometry of dynamic shapes (such as people and clothes in motion) …
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An Investigation of Quantifying and Monitoring Stone Surface Deterioration Using Three Dimensional Laser Scanning
Three dimensional laser scanning is considered to be the next generation of documentation methods, however the cost of these technologies remains extremely high and there are both known and unknown limitations of their application. This thesis, therefore, investigates the strengths and weaknesses …
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Local imaging of magnetic flux in superconducting thin films
… precipitates) causes a severe problem to the scanning MFM tip, a nanoscale wedge polishing technique that allows to overcome this problem was developed. Mounting the sample under a defined small angle results in a smooth surface and a monotonic thickness reduction of the film along the length …
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Modeling aperture radiation for RF interference applications
… noise sources obtained by planar near-field scanning techniques. The sampling data array is converted into an expansion of vector roof-top basis functions. Numerical integrations are used to calculate both near-field radiations of the noise sources.</p> <p>The third topic proposes a …
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Clinical and ultrasonic estimation of fetal weight
… fetal mass. Since the introduction of ultrasound scanning techniques to obstetrics in the mid- 1960's, it has become possible to visualise the fetus and to make direct measurements of fetal anatomy. By using ultrasound, workers have tried to predict fetal weight by measuring fetal heart volume, …
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Medium Resolution
… During the industrial revolution, machines and techniques were invented and advanced for forming materials into standardized shapes. This would lead to the development of the industrially mass-produced standardized building materials used today and transformed architecture into a practice of …
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CSADP, a classical control system analysis and design package
… data. The curve-fitting program uses novel data-scanning techniques for conditioning the data, and for predicting the model form and starting parameters. CSADP also allows the user to design compensators interactively using Bode and root-locus methods, and aids the user in selecting the required …
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