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 289 for “"breakage"”.
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Fuzzy logic control for reducing drying-induced corn breakage
… logic control system for reducing drying-induced breakage of corn for a continuous crossflow grain dryer was developed. This system makes control decisions for heater setting and discharge rotor speed based on the underlying relationships between the measurable process variables and the outlet …
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An experimental investigation of glass breakage in compartment fires
… window tests indicated that the glass breakage was caused by a critical temperature difference between the central heated portion of the pane and the glass edge. The experimental work showed the critical value to be approximately 90C. After the material properties of the glass were …
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Investigating the products from different modes of particle breakage testing
… is dependent on the accuracy with which ore breakage can be predicted. This hinges on our understanding of the basic concepts of breakage and the different modes in which it manifests in the comminution environment. Three distinctly different modes of breakage were identified and investigated …
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Developing a methodology for reducing diamond breakage within processing plant
Diamond breakage has been a problem experienced by diamond operations. Material breakage characterisation methods has been used to determine the hardness or resistance to breakage of diamond host rock, ceramic diamond simulants and simulants embedded in the concrete blocks. This establishes a …
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Ore breakage characterisation of UG2 deposits using the JK RBT
Ore breakage characterisation is a methodology that is used to determine the ore hardness, or resistance to breakage which can be compared across a database of different rock types. It thus develops a relationship between specific energy input and degree of breakage which can be applied to impact …
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Particle breakage in sand blasting due to impact on ductile materials
… is required to predict the sand particle breakage.;In the present thesis, a finite element model of the sand particle is developed in LS-INGRID and a transient dynamic analysis is performed in LS-DYNA3D. This study focuses mainly on the propagation of stress waves and the volume loss of …
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Residual Stress Effects on Power Slump and Wafer Breakage in GaAs MESFETs
… the role of device processing on wafer breakage. All three objectives were successfully met. The single crystal stress technique uses a least squares analysis of X-ray diffraction data to calculate the full stress tensor. In this way, precise non-destructive stress measurements can be …
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Measurement of impact breakage properties of ore particles using a series of devices
Single particle impact breakage experiments provide essential data to aid in the fundamental understanding of rock fracture in comminution. Such experiments, conducted using devices such as the drop weight tester, split Hopkinson bars and more recently the rotary breakage tester, have been …
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Measuring the fracture energy of bed breakage using a short impact load cell
… comminution. In industrial machines particle breakage occurs mainly through three mechanisms: impact, abrasion and attrition. Of these mechanisms, impact breakage is known to be the most basic form of particle size reduction. Comminution devices are highly inefficient, as the energy used for …
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A study of impact breakage of single rock specimen using discrete element method
… aims to reduce the size of ore particles through breakage, consequently increasing the likelihood of the liberation of valuable minerals. However, comminution is highly energy-intensive and an understanding of the key breakage mechanisms has been identified as an important factor in improving the …
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Particle breakage and material transport in the design of high-efficiency comminution device
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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An Experimental Investigation of the Effect of Blasting on the Impact Breakage of Rocks
… tested, crushed and their Bond Work Index and breakage parameters have been determined. The process was repeated for 3 different types of granite blocks (Stanstead, Laurentian, and Barre granite) using samples not blasted previously and samples blasted with three different powder factors …
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Discrete element method modelling of particle breakage and wear in High Pressure Grinding Rolls
… rolls. The micro-phenomena of particles, such as breakage behaviour and strength weakening were investigated and calibrated by implementing a particle breakage model. This model was employed to simulate the particle breakage occurring during the grinding process, analysing the principle of …
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Breakage in the SNRPN locus in a balanced translocation patient with Prader-Willi syndrome
This document only includes an excerpt of the corresponding thesis or dissertation. To request a digital scan of the full text, please contact the Ruth Lilly Medical Library's Interlibrary Loan Department (rlmlill@iu.edu).
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Comparison of time taken and breakage of six different endodontic systems to prepare molar teeth
… of this study was to determine duration time, breakage and apical displacement, whilst using six different endodontic filing systems to prepare molar teeth. A total of 96 molar teeth were used in the study, divided equally, ie 16 teeth per system selected randomly, totalling 48 canals per …
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An investigation into the suspension, attrition and breakage of nickel crystals during the nickel reduction process
… speeds required for suspension, attrition and breakage of nickel crystals in an autoclave.
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K3 Endo, Pro Taper, and Pro File Systems: Breakage and Distortion in Severely Curved Roots of Molars
K3 ENDO, PRO TAPER, AND PRO FILE SYSTEMS: BREAKAGE AND DISTORTION IN SEVERELY CURVED ROOTS OF MOLARS.By Matthew T. Ankrum, D.D.S.A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science at Virginia Commonwealth University.Virginia Commonwealth University, …
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Using discrete element modelling (DEM) and breakage experiments to model the comminution action in a tumbling mill
… of the tumbling mill however do not simulate the breakage of the particles and as such can not directly predict the product. In order to predict the performance of industrial-scale tumbling mills, laboratory-scale mills are used to experimentally obtain data, which is then scaled up using black …
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Elimination of PZT thin film breakage caused by electric current arcing and intrinsic differential strains during poling
Historically, substrate breakage during the poling process has been responsible for a 2% yield loss for a contract manufacturer specializing in volume production of lead zirconate titatate (PZT) thin film devices. In this research, two major causes of poling breakage were identified. First, …
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Mechanistic Study of Fragile Site Breakage by Investigating RET/PTC Rearrangements, a Common Cause of Papillary Thyroid Carcinoma
… there has been no direct evidence linking breakage at fragile sites to the formation of a cancer-causing chromosomal translocation. While fragile sites are stable under normal conditions, exposure to certain chemicals can induce DNA breakage at fragile sites, which ultimately may result in …
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