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Dissertations / Theses on the topic 'DIM method'

Author: Grafiati

Published: 21 September 2024

Last updated: 31 July 2025

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1

Helvacı, Deniz Keskin Mustafa Erol. "Dim barajının dinamik analizi /." Isparta : SDÜ Fen Bilimleri Enstitüsü, 2009. http://tez.sdu.edu.tr/Tezler/TF01235.pdf.

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2

Gomez, Arturo, and Gema Rueda. "DIM : A systematic and lightweight method for identifying dependencies between requirements." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3280.

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Dependencies between requirements are a crucial factor for any software development since they impact many project areas. Nevertheless, their identification remains a challenge. Some methods have been proposed but none of them are really applicable to real projects due to their high cost or low accuracy. DIM is a lightweight method for identifying dependencies proposed on a previous paper. This paper presents an experiment comparing the sets of dependencies found by DIM and a method based on pair-wise comparison. The experiment was executed using a requirement specification for an open source

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3

Tenanguena, Nongni Fresnelle. "Modélisation de la formation des ions moléculaires dans les plasmas froids de gaz rares." Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSES080.

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Les ions moléculaires, en particulier les ions dimères de gaz rares, ont une influence très importante sur le comportement des plasmas de gaz rares utilisés dans de nombreux domaines. Par conséquent, l'analyse et la compréhension de leur formation sont d'une grande importance pour la modélisation macroscopique de ces plasmas. L'objectif principal de ce travail est de calculer les constantes de réaction de formation des dimères dans les plasmas froids utilisant des gaz rares comme porteurs sur une large gamme de champs électriques réduits. Pour ce faire, nous avons utilisé des données mésoscopi

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4

Pikhartová, Karolína. "Analýza vlivu Luhačovické přehrady na okolí." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399633.

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This thesis deals with the influence of the Luhačovice dam on the surroundings, mainly on the price of recreational facilities. Firstly, the thesis addresses terminology, issues concerning dams and valuation methods suitable for these issues. Secondly, the thesis describes the current condition of the dam and its surroundings, the facilities situated in the surroundings and operation costs. The thesis presents a novel method of finding the average price of cottages in given area and comparing it with average prices of recreational facilities in other selected areas. The thesis concludes with a

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5

Katre, Aanandita Ramakant. "Developing Methods for Prediction and Reduction of Springback using a Practical Method to Estimate E-Modulus." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1500028074848847.

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6

Kovářová, Lucie. "Měření deformace statorového kroužku turbodmychadla při teplotním zatížení." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401547.

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The thesis is about deformation measurement of the nozzle ring in variable nozzle turbine mechanism under temperature load. In the first part, there is a brief description of the turbocharger. In the second part, methods of deformation measurement are mentioned there. The main part of the thesis includes component testing of selected measuring methods and their application for measuring deformation of the nozzle ring on the turbocharger. Test is done on a gas stand which simulates the thermal load conditions of the turbocharger, same which is exposed to on the engine.

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7

Lee, Haegyun. "Level-set finite element simulation of free-surface flow." Diss., University of Iowa, 2007. http://ir.uiowa.edu/etd/168.

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8

Chaumeil, Florian. "Using DEM-CFD method at colloidal scale." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8066.

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The aim of this work is to look into the applicability of Discrete Element Modelling (DEM) coupled to Computational Fluid Dynamics (CFD) to simulate micro-scale colloidal particles immersed in fluid. Numerical methods were implemented through the commercial framework of EDEM2.3. As opposed to dissolved matter, which behaves as a continuum within the fluid medium, particulate matter is made of discrete entities that interact amongst themselves, and with the fluid and any physical boundaries. Particulate matter is ubiquitous in many purification processes that would beneficiate from having an ea

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9

Sharp, Jacqueline Emily U'Ren. "Applicability of the Mathews Stability Method to Open Stope Stability Assessment at Olympic Dam Mine." Thesis, University of Canterbury. Geological Sciences, 2011. http://hdl.handle.net/10092/5520.

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Olympic Dam underground mine is located in South Australia approximately 520km north-north-west of Adelaide. The copper-gold-uranium deposit is extracted by open stope mining. The empirical Mathews stability method has been applied to open stope stability forecasting at Olympic Dam for the more than 20 years. This method adjusts the rock tunneling quality index (Q’) to allow for a rock stress factor, the orientation of any discontinuity and the orientation of the geometric surface formed by the excavation. The applicability of the Mathews stability method at Olympic Dam was analysed by assessi

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10

Vítek, Pavel. "Vlastnosti svarových spojů po žárovém zinkování." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229350.

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The project elaborated in frame of Master's studies branch 2303T002 presents a study of welded joints for hot-dip galvanizing. On the basis of literature study it is assumed that zinc influences the properties of welded joints. Samples were made of high strength steels DOMEX and wear-resistant steels HARDOX which were welded using MAG. Subsequently, half of the samples treated with zinc. The evaluation is used tear test and test Vickers hardness. Finally, the project is the comparison of the measured values of galvanized steel and steel without zinc.

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11

Torkelsson, Olle, and Markus Dauksz. "DFMA : A Methodology Study and Method Development." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-9562.

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Volvo Cars Corporation (VCC) is devoted to Lean and Six Sigma, and has lately considered an imple-mentation of Design for Manufacturing and Assembly (DFMA) with the purpose of improving their product design process and production. The goal for this project work is therefore to investigate if DFMA is a beneficial method for VCC to use, how DFMA can be used and suggest a DFMA method. A literature study is performed as a starting point to understand DFMA methods and its possibilities. Scientific articles, technical books and online sources is used during the study in order to gather in-formation

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12

Tsuruta, Naoki. "Improved Particle Method with High-Resolution and Computational Stability for Solid-Liquid Two-Phase Flows." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188536.

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Charatpangoon, Bhuddarak. "SEISMIC SAFETY EVALUATION OF EARTH DAM AND POSSIBLE REHABILITATION METHODS." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/192169.

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14

Tichý, Richard. "Beitrag zur numerischen Untersuchung der Bewegungs- und Beanspruchungsprofilen in einer Kugelmühle unter Verwendung von physikalisch begründeten Stoßparametern." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2011. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-69915.

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Die am häufigsten für die Zerkleinerung des Zementklinkers eingesetzte Kugelmühle stellt eine relativ einfache Maschine dar, in der sehr komplizierte dynamische Wechselwirkungen herrschen. Die direkte Messung der Beanspruchungsintensitäten ist heutzutage immer noch eine schwierige Aufgabe. In der vorliegenden Arbeit sind die Spektren der Beanspruchungsgrößen sowie einige spezifische integrale Größen mit der Methode der diskreten Elemente (DEM) untersucht worden. Eine besondere Aufgabe bestand in der Ermittlung der Parameter des viskoelastischen Kontaktmodells und der den Zementklinker charakte

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15

Vadluga, Vaidas. "Simulation of dynamic deformation and fracture behaviour of heterogeneous structures by discrete element method." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080213_082157-83281.

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Research area and topicality of the work. Mechanical properties and their evolution under loading are the most significant factors for the development of various mechanical structures, technologies and equipment. It seems to be natu-ral that deeper understanding of the behaviour of existing and design of new materials presents a challenge in different research areas. It should be noted, that all the materials are heterogeneous in meso- and micro- scales. They exhibit essential differences, compared to the macroscopic continuum behaviour. Basically, both experimental and numerical simulation m

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16

Zhou, Yu. "Simulation of High-velocity Penetration for Rigid Projectile into Plain Concrete Target using Discrete Element Method." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/31325.

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Penetration of high velocity is of concern for both civilian and military research for decades, and computerized simulation is the scholarâ s focus in recent years. This study presents a study on the Discrete Element Method (DEM) simulation of plain concrete targetâ s behavior under high-velocity penetration of rigid projectile. In this thesis, different types of research works including empirical, analytical and numerical methods in penetration by the previous scholars were carefully reviewed. A DEM-based concrete model was established by using software PFC3D. The major micro-variables o

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17

Alsuleimanagha, Zaid, and Jing Liang. "Dynamic analysis of the Baozhusi dam using FEM." Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171817.

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High magnitude earthquakes have devastating effects that leads to severe human and material losses; when affecting concrete gravity dams, seisms devastate the surrounding habitat through sudden release of reservoir. Dam safety is therefore a significant issue to be accounted in order to prevent the failure of dams located in seismic regions. The Baozhusi dam, the case study of this thesis, was exposed to 8.0 Ms (at the Mercalli scale) Wenchuan earthquake 2008 with intensity of (0.148 g) at the dam site. The earthquake intensity exceeded the design level of the dam (0.1 g); yet, the Baozhusi da

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18

Spross, Johan. "A Critical Review of the Observational Method." Licentiate thesis, KTH, Jord- och bergmekanik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-144207.

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Building a sustainable structure in soil or rock that satisfies all predefined technical requirements implies choosing a rational and effective construction method. An important aspect is how the performance of the structure is verified. For cases when the geotechnical behaviour is hard to predict, the existing design code for geotechnical structures, Eurocode 7, suggests the so-called “observational method” to verify that the performance is acceptable. The basic principle of the method is to accept predefined changes in the design during construction, in order to accommodate the actual ground

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19

Kováříková, Sabina. "Využití DIC při měření zbytkových napětí metodou vrtání otvoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-418191.

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This thesis deals with measurement of residual stress by hole drilling method. This method is based on drilling a hole and measurement of deformation in the area around this hole. Measured deformations are then converted to residual stresses by using calibration coefficients. The deformation around the drilled hole is measured by optical non contact method called digital image correlation (DIC). First part of the thesis is focused on current state of research. The thesis contains evaluation of residual stresses by using different methods and evaluation of used methods.

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20

Cibis, Anna. "Erklärt die Methodenwahl höhere Suizidraten bei Männern?" Doctoral thesis, Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-144278.

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Suizid gehört in den meisten Ländern weltweit zu den zehn führenden Todesursachen und wird laut Studien der WHO im Jahr 2020 2,4% des weltweiten „Burden of Disease“ ausmachen (1998:1,8%). Auch Suizidversuche, deren Zahl auf das 10-20fache der Suizide geschätzt wird, stellen eine starke Belastung und einen hohen Kostenfaktor für die Gesundheitssysteme dar. Bezüglich der vollendeten Suizide sind Männer ungefähr 2 bis 3mal so häufig betroffen wie Frauen, bei Suizidversuchen verhält es sich umgekehrt. Mit dem Ziel, dieses Phänomen zu verstehen und effektivere Suizidpräventionsmethoden zu finden, w

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21

Busta, Michal. "Analýza namáhání vybraných konstrukčních částí bagru při provozu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443770.

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This thesis is focused on the issue of computational modeling of soil harvesting while using the compact excavator from the company DOOSAN BOBCAT EMEA s.r.o.. The solution consists in creating two computational models in Rocky DEM and Ansys Mechanical. Rocky DEM software is used to solve the disconnection of soil by excavator components using the discrete element method. The outcome includes courses of forces and moments during the particular time of the individual joints of the model that was used. The obtained courses are then applied as an external load to the joint of a selected structural

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22

Durieux, Johan Hendrik. "Development of a practical methodology for the analysis of gravity dams using the non-linear finite element method." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-06232009-152815/.

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23

Hedman, Stefan. "Smooth and non-smooth approaches to simulation of granular matter." Thesis, Umeå universitet, Institutionen för fysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-50584.

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Granular matter is defined as a collection of particle grains, such as sand.This type of matter have different characteristics (solid, liquid and gas) depending on the energy level per grain. There are several approaches to modeling and numerical simulations of granular matter. They are used by different groups for different purposes, and the choice between the approaches is based on knowledge and tradition rather than what might be best for the purpose. The key questions are when to use what method and what physical quality is lost depending on the choice.Two regimes of discrete element granu

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24

Johnstone, Mical William. "Calibration of DEM models for granular materials using bulk physical tests." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4655.

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From pharmaceutical powders to agricultural grains, a great proportion of the materials handled in industrial situations are granular or particulate in nature. The variety of stesses that the matierals may experience and the resulting bulk behaviours may be complex. In agricultural engineering, a better understanding into agricultural processes such as seeding, harvesting, transporting and storing will help to improve the handling of agricultural grains with optimised solutions. A detailed understanding of a granular system is crucial when attempting to model a system, whether it is on a micro

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25

Brown, Nicholas John. "Discrete element modelling of cementitious materials." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8011.

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This thesis presents a new bonded particle model that accurately predicts the wideranging behaviour of cementitious materials. There is an increasing use of the Discrete Element Method (DEM) to study the behaviour of cementitious materials such as concrete and rock; the chief advantage of the DEM over continuum-based techniques is that it does not predetermine where cracking and fragmentation initiate and propagate, since the system is naturally discontinuous. The DEM’s ability to produce realistic representations of cementitious materials depends largely on the implementation of an inter-part

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Pierce, Ian. "Applying the Material Point Method to Identify Key Factors Controlling Runout of the Cadia Tailings Dam Failure of 2018." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/104218.

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This thesis examines the 2018 failure of the Northern Tailings Storage Facility at Cadia Valley Operations, located in New South Wales, Australia. First, the importance of examining and understanding failure mechanisms and post failure kinematics is described. Within which we understand that in the current state of affairs it is exceedingly difficult, or nigh impossible to perform without the use of large strain analyses, which have yet to permeate into the industry to a significant degree. Second, the initial construction and state of the dam just prior to failure is defined, with the materia

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Sukcharoenpong, Anuchit. "Shoreline Mapping with Integrated HSI-DEM using Active Contour Method." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406147249.

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Potgieter, Andrew. "A Parallel Multidimensional Weighted Histogram Analysis Method." Thesis, University of Cape Town, 2014. http://pubs.cs.uct.ac.za/archive/00000986/.

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The Weighted Histogram Analysis Method (WHAM) is a technique used to calculate free energy from molecular simulation data. WHAM recombines biased distributions of samples from multiple Umbrella Sampling simulations to yield an estimate of the global unbiased distribution. The WHAM algorithm iterates two coupled, non-linear, equations, until convergence at an acceptable level of accuracy. The equations have quadratic time complexity for a single reaction coordinate. However, this increases exponentially with the number of reaction coordinates under investigation, which makes multidimensional WH

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Jeong, Gi Young. "Tensile Properties of Loblolly Pine Strands Using Digital Image Correlation and Stochastic Finite Element Method." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/29563.

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Previous modeling of wood materials has included many assumptions of unknown mechanical properties associated with the hierarchical structure of wood. The experimental validation of previous models did not account for the variation of mechanical properties present in wood materials. Little research has explored the uncertainties of mechanical properties in earlywood and latewood samples as well as wood strands. The goal of this study was to evaluate the effect of the intra-ring properties and grain angles on the modulus of elasticity (MOE) and ultimate tensile strength (UTS) of different orien

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30

Tang, Wee-Hua. "EFFICIENT INTEGRAL EQUATION METHOD FOR 2.5D MICROWAVE CIRCUITS IN LAYERED MEDIA." UKnowledge, 2005. http://uknowledge.uky.edu/gradschool_diss/345.

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An efficient integral equation method based on a method of moment (MoM) discretization of the Mixed-Potential Integral Equation (MPIE) for the analysis of 2.5D or 3D planar microwave circuits is presented. The robust Discrete Complex Image Method (DCIM) is employed to approximate the Greens functions in layered media for horizontal and vertical sources of fields, where closed-form formulations of the z-integrations are derived in the spectral domain. Meanwhile, an efficient and accurate numerical integration technique based on the Khayat-Wilton transform is used to integrate functions with 1/R

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31

Garza-Delgado, Abelardo. "A study of casting distortion and residual stresses in die casting." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1196175848.

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Rangelova, Sandra. "Methods for assessing the consistency of the New National Height Model." Thesis, KTH, Fastigheter och byggande, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299788.

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Digital Elevation Models (DEM) are a simple representation of the Earth’s surface. DEMs play an important role in the field of remote sensing and GIS and are used as basis for mapping and analysis for a vest majority of scientific applications. There are many ways of producing DEMs, however the direct geo-referencing technology has made Airborne Laser Scanning (ALS) a preferred technology for the acquisition of accurate surface models over broad areas. ALS uses LiDAR (Light Detection and Ranging) which uses light in a form of pulsed laser to measure distances. Before the introduction of the DE

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O'Connor, Mark J. "Evaluation of TIN extraction methods for various terrain textures." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-09182008-063345/.

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Jacobi, Christoph Alexander. "Methodenlehre der Normwirkung : die Normwirkung als Massstab der Rechtsgewinnung /." Baden-Baden : Nomos, 2008. http://d-nb.info/990130010/04.

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Spross, Johan. "Toward a reliability framework for the observational method." Doctoral thesis, KTH, Jord- och bergmekanik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192825.

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Constructing sustainable structures in rock that satisfy all predefined technical specifications requires rational and effective construction methods. When the geotechnical behaviour is hard to predict, the European design code, Eurocode 7, suggests application of the observational method to verify that the performance is acceptable. The basic principle of the method is to accept predefined changes in the design during construction to comply with the actual ground conditions, if the current design is found unsuitable. Even though this in theory should ensure an effective design solution, fo

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Fanelli, Maddalena. "UNDERSTANDING AGGLOMERATE DISPERSION: EXPERIMENTS AND SIMULATIONS." online version, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=case1119374160.

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Sultan, Abdullah Emad. "Alternative Methods for Sealing Overlapping Steel Members with Narrow Gaps During Galvanizing." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/83182.

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Narrow gaps in overlapping structural steel surfaces are problematic when being hot-dip galvanized due to the potential for trapped cleaning solutions between the surfaces. A seal-weld is often used to prevent the cleaning solutions from penetrating this gap. However, these welds are not necessary used for strength, and add fabrication costs because of the additional weld. The purpose of this research is to provide alternatives, which fall under two major categories, to the seal-weld fabrication process. The first one was motivated by the steel fabrication industry and uses a commercial silico

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Polwaththe, Gallage Hasitha Nayanajith. "Numerical modelling of deformation behaviour of red blood cells in microvessels using the coupled SPH-DEM method." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/91719/1/Hasitha%20Nayanajith_Polwaththe%20Gallage_Thesis.pdf.

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This thesis developed an advanced computational model to investigate the motion and deformation properties of red blood cells in capillaries. The novel model is based on the meshfree particle methods and is capable of modelling the large deformation of red blood cells moving through blood vessels. The developed model was employed to simulate the deformation behaviour of healthy and malaria infected red blood cells as well as the motion of red blood cells in stenosed capillaries.

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Nasato, Daniel Schiochet. "Desenvolvimento de acoplamento númerico entre o método dos elementos discretos (DEM) e o método dos elementos finitos." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266925.

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Orientadores: José Roberto Nunhez, Nicolas Spogis<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-17T20:12:44Z (GMT). No. of bitstreams: 1 Nasato_DanielSchiochet_M.pdf: 8429075 bytes, checksum: 08b5ea34c892e0a82506be022a1613ee (MD5) Previous issue date: 2011<br>Resumo: Este trabalho propõe um acoplamento entre o método dos elementos discretos (DEM), utilizado para simular o manuseio de materiais particulados, e o método dos elementos finitos (FEM), utilizado para estimar respostas estruturais a uma dada con

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Daryusi, Ali. "Beitrag zur Ermittlung der Kerbwirkung an Zahnwellen mit freiem und gebundenem Auslauf." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1240915811153-56748.

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Durch die zunehmende technologische Entwicklung des Getriebe-, Gelenkwellen-, Werkzeugmaschinen-, Kraftfahrzeug-, sowie Landmaschinenbaus steigen die zu übertragenden Leistungen und Drehmomente enorm. Dies führt zu einem wachsenden Bedarf an formschlüssigen Profilwellenverbindungen und deren erhöhter Lebensdauer und Genauigkeit. Hierbei bilden die Zahnwellenverbindungen (ZWVen) mit Evolventenflanken nach DIN 5480 /N1/ den Regelfall für eine Vielzahl der Anwendung. Abhängig von Festigkeitsüberlegungen, Herstellungsverfahren und Platzbedarf treten in der Praxis nahezu ausschließlich die folgende

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Krenzer, Knut. "Entwicklung eines zustandsabhängigen DEM-Stoffmodells zur Nachbildung von Mischprozessen für Frischbeton." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-226677.

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In der vorliegenden Dissertation wird ein Simulationsmodell für die Diskrete Elemente Methode vorgestellt, das in der Lage ist, das Materialverhalten während des Mischprozesses von Frischbeton nachzubilden. Zur realitätsnahen Abbildung des Materialverhaltens während des gesamten Mischprozesses ist zum einen die korrekte, prozessabhängige Modellierung der Feuchtigkeitsverteilung im Mischgut notwendig. Zum anderen definiert sich das lokale Materialverhalten durch den aktuellen Feuchtegrad und die Materialzusammensetzung der Mischung und muss im Simulationsmodell Berücksichtigung finden. Zur korr

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42

Vaquer, Charles. "Optimisation du dimensionnement et comportement des matrices frettees." Toulouse 3, 1988. http://www.theses.fr/1988TOU30024.

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Sekula, Peggy [Verfasser], and Martin [Akademischer Betreuer] Schumacher. "Statistical modelling for risk assessment in pharmacoepidemiology: the case-crossover method = Statistische Modellierung zur Risikobeurteilung in der Pharmakoepidemiologie: die case-crossover-Methode." Freiburg : Universität, 2012. http://d-nb.info/1123471053/34.

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Liu, Haoyu. "System reliability calibrations for the Direct Design Method of planar steel frames with partially restrained connections." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/20858.

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The system-based design approach for steel structures using advanced structural analysis, referred to as the Direct Design Method (DDM), has gained much research interest from the scientific community, and has been permitted in a number of steel structural specifications such as American specification AISC360 and Australian standard AS4100. Unfortunately, even the most sophisticated nonlinear analysis method cannot predict the actual performance of a structure with certainty due to ever-present uncertainties in the demands imposed to the structure and structural resistance. To fulfill the goal

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Barrett, Benjamin Joseph. "Field Validation of an Advanced Autonomous Method of Exterior Dam Inspection Using Unmanned Aerial Vehicles." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7463.

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The maintenance of infrastructure is critical to the well-being of society. This work focuses on a novel method for inspecting the exterior of dams using unmanned aerial vehicles (UAVs) in an automated fashion. The UAVs are equipped with optical sensors capturing still images. The resulting images are used to generate three-dimensional (3D) models using Structure from Motion (SfM) computer software. The SfM models are then used to inspect the exterior of the dam. As typical dam inspections entail completing a checklist of inspection items with varied degrees of precision (e.g. a concrete spill

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Fonner, Adam M. "An Investigation on Syndiotactic Polystyrene Aerogel Coating of Macroporous Fabric via Dip Coating Method." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron15550203400871.

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Duncan, Susan Cromwell. "Improving the prediction of differential item functioning: a comparison of the use of an effect size for logistic regression DIF and Mantel-Haenszel DIF methods." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/5876.

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Psychometricians and test developers use DIF analysis to determine if there is possible bias in a given test item. This study examines the conditions under which two predominant methods for determining differential item function compare with each other in item bias detection using an effect size statistic as the basis for comparison. The main focus of the present research was to test whether or not incorporating an effect size for LR DIF will more accurately detect DIF and to compare the utility of an effect size index across MH DIF and LR DIF methods. A simulation study was used to compare th

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Shah, Ritesh Lalit. "Optimized upper bound analysis of polymer coated metal rod extrusion through conical die." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5907.

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Extrusion is a metal forming process used extensively in industry to produce different structural, mechanical, electrical, architectural, automotive and aerospace application parts. Currently after extrusion, the rod is subjected to environmental wear due to long storage time and hence requires an additional cleaning process before further use. This cleaning process can be eliminated by extruding a polymer coated metal rod workpiece such that the polymer coating is sustained on the final product after the extrusion process. In the present research study a new upper bound analytical model is de

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Morrissey, John Paul. "Discrete element modelling of iron ore pellets to include the effects of moisture and fines." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8270.

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Across industry the majority of raw materials handled are particulate in nature, ranging in size and properties from aggregates to powders. The stress regimes experienced by the granular solids vary and the exhibited bulk behaviours can be complex and unexpected. The prevalence of granular solids makes them an area of interest for industry and researchers alike as many challenges still remain, such as dealing with complex cohesive behaviour in materials, which often gives rise to handling difficulties. Storage and transportation are an important part of the process chain for industries where p

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Thakur, Subhash Chandra. "Mesoscopic discrete element modelling of cohesive powders for bulk handling applications." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9777.

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Many powders and particulate solids are stored and handled in large quantities across various industries. These solids often encounter handling and storage difficulties that are caused by the material cohesion. The cohesive strength of a bulk material is a function of its past consolidation stress. For example, high material cohesive strength as a result from high storage stresses in a silo can cause ratholing problems during discharge. Therefore, it is essential to consider the stress-history dependence when evaluating such handling behaviour. In recent years the Discrete Element Method (DEM)

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