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11	Innovative Tandem GTAW with Alternating Side-by-Side Spot-Like Welds to Minimize Centerline Solidification Cracking Albannai, Abdulaziz I., Mr January 2017 (has links) No description available. Materials Science Aerospace Engineering Aerospace Materials Metallurgy
12	The experimental investigation of the effect of chamber length on jet precession Madej, Adam Martin 11 1900 (has links) The effect of chamber length and Reynolds number on the stability and behavior of the flow field generated by a precessing jet nozzle was studied using stereoscopic particle image velocimetry (StereoPIV). An algorithm was developed to determine the mode of the flow based on the distribution of axial velocity. The optimal chamber length for precession to occur was found to be between 2 and 2.75 chamber-diameters. There is no precession at a chamber length of one diameter, and the occurrence of precession was found to be strongly related to Reynolds number. Conditionally averaged velocity distributions for the flow in precessing mode were calculated. The effect of initial condition on downstream behavior of axisymmetric jets was examined. Variations in spread and decay rates were found for jets issuing from different nozzles. Self-similar solutions for axisymmetric jets are therefore not universal, and are instead dependent upon initial conditions at the source. jet precession precessing jet axisymmetric jet StereoPIV self-similar particle image velocimetry chamber length precession centerline velocity decay initial condition
13	The experimental investigation of the effect of chamber length on jet precession Madej, Adam Martin Unknown Date No description available. jet precession precessing jet axisymmetric jet StereoPIV self-similar particle image velocimetry chamber length precession centerline velocity decay initial condition
14	Detection of Final Solidification Due to Variation of Ferrostatic Pressure during Continuous Casting XU, TIJIE January 2017 (has links) This paper presents an investigation on using the variation of ferrostatic pressure exerted by the molten steel in the strand to the support rolls during continuous casting to detect the location of the final solidification. The final solidification point is of high importance for applying soft reduction during continuous casting in order to ensure inner quality and achieve high productivity. The measurement was conducted at one of the casters at SSAB Oxelösund, of which all the support rolls are separately mounted. The project finds that this method shows promising results and can help to narrow down the range of the location due to certain interferences and noises. The ferrostatic pressure decrease during tail-out and the variation of whether a pressure drop exists is the dividing line of full and partial solidification. With the promising results achieved, more effort should be put to further improve the method. continuous casting soft reduction centerline segregation ferrostatic pressure final solidification Engineering and Technology Teknik och teknologier Other Materials Engineering Annan materialteknik
15	Computer Assisted Coronary CT Angiography Analysis : Disease-centered Software Development Wang, Chunliang January 2009 (has links) The substantial advances of coronary CTA have resulted in a boost of use of this new technique in the last several years, which brings a big challenge to radiologists by the increasing number of exams and the large amount of data for each patient. The main goal of this study was to develop a computer tool to facilitate coronary CTA analysis by combining knowledge of medicine and image processing.Firstly, a competing fuzzy connectedness tree algorithm was developed to segment the coronary arteries and extract centerlines for each branch. The new algorithm, which is an extension of the “virtual contrast injection” method, preserves the low density soft tissue around the coronary, which reduces the possibility of introducing false positive stenoses during segmentation.Secondly, this algorithm was implemented in open source software in which multiple visualization techniques were integrated into an intuitive user interface to facilitate user interaction and provide good over¬views of the processing results. Considerable efforts were put on optimizing the computa¬tional speed of the algorithm to meet the clinical requirements.Thirdly, an automatic seeding method, that can automatically remove rib cage and recognize the aortic root, was introduced into the interactive segmentation workflow to further minimize the requirement of user interactivity during post-processing. The automatic procedure is carried out right after the images are received, which saves users time after they open the data. Vessel enhance¬ment and quantitative 2D vessel contour analysis are also included in this new version of the software. In our preliminary experience, visually accurate segmentation results of major branches have been achieved in 74 cases (42 cases reported in paper II and 32 cases in paper III) using our software with limited user interaction. On 128 branches of 32 patients, the average overlap between the centerline created in our software and the manually created reference standard was 96.0%. The average distance between them was 0.38 mm, lower than the mean voxel size. The automatic procedure ran for 3-5 min as a single-thread application in the background. Interactive processing took 3 min in average with the latest version of software. In conclusion, the presented software provides fast and automatic coron¬ary artery segmentation and visualization. The accuracy of the centerline tracking was found to be acceptable when compared to manually created centerlines. Coronary CTA vessel segmenation centerline tracking visualization Radiologi och bildbehandling Cardiac and Cardiovascular Systems Kardiologi
16	BBT Side Mold Assy Hemphill, Bill 07 June 2022 (has links) This electronic document file set covers the design and fabrication information of the ETSU Guitar Building Project’s BBT (OM-sized) Side Mold Assy for use with the STEM Guitar Project’s standard acoustic guitar kit. The extended 'as built' data set contains an overview file and companion video, the 'parent' CADD drawing, CADD data for laser etching and cutting a drill &/or layout template, CADD drawings in AutoCAD .DWG and .DXF R12 formats of the centerline tool paths for creating the mold assembly pieces on an AXYZ CNC router, and support documentation for CAM applications including router bit specifications, feeds, speed, multi-pass data, and layer names (formatted for AXYZ's ToolPath CAM software). BBT acoustic guitar mold side assembly CAD CADD DWG CNC router luthier ETSU OM orchestra model STEM kit storefront plywood MDF edges centerline toolpaths laser template Acoustics, Dynamics, and Controls Algebra Algebraic Geometry Appalachian Studies Applied Mathematics Biology Computer-Aided Engineering and Design Engineering Education Engineering Science and Materials Forest Sciences Industrial and Product Design Manufacturing Music Other Engineering Physics Polymer and Organic Materials Polymer Chemistry Science and Mathematics Education

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