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Dissertations / Theses on the topic 'Compressional stress'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Ozkale, Aslihan. "Overpressure prediction by mean total stress estimate using well logs for compressional environments with strike-slip or reverse faulting stress state." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4762.

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Predicting correct pore-pressure is important for drilling applications. Wellbore stability problems, kicks, or even blow-outs can be avoided with a good estimate of porepressure. Conventional pore-pressure estimation methods are based on one-dimensional compaction theory and depend on a relationship between porosity and vertical effective stress. Strike-slip or reverse faulting environments especially require a different way to determine pore-pressure, since the overburden is not the maximum stress. This study proposes a method which better accounts for the three-dimensional nature of the str

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2

Gunn, D. A. "Electronic instrumentation for the measurement of velocities and attenuations of shear and compressional seismic waves in rocks and soils under in-situ stress conditions." Thesis, University of Manchester, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.690902.

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3

Tandon, Surinder Kumar. "Deformations of helical fibres under uniformly and non-uniformly distributed compressive forces." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235516.

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4

Rahman, Mohd Tahir Bin Abdul. "Further studies of the stress relaxation behaviour of rubber in compression." Thesis, Loughborough University, 1985. https://dspace.lboro.ac.uk/2134/7300.

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Part 1 - The Drying of Natural Rubber: This was the initial research programme to be carried out at the Institute of Polymer Technology as a result of renewed interest in the area following information feed-back from the natural rubber consumers indicating a problem of wet rubber contamination. However, due to the difficulty in producing an acceptable starting material, the work had to be terminated with the compilation of what had been achieved including the literature survey, trials to produce a representative field latex coagulum, dewatering, diffusion and absorption experiments. Part 2 - F

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5

Liu, Jianning. "Stress Relaxation Behavior of Polymer Glasses in Both Extension and Compression." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1427995606.

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6

Tawana, Siyd S. "Behavior of plain and steel fiber reinforced concrete under multiaxial stress." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1178903105.

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7

Drake, Matthew Henry. "Stream programming for image and video compression." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36774.

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Thesis (M. Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2006.<br>Includes bibliographical references (p. 101-108).<br>Video playback devices rely on compression algorithms to minimize storage, transmission bandwidth, and overall cost. Compression techniques have high realtime and sustained throughput requirements, and the end of CPU clock scaling means that parallel implementations for novel system architectures are needed. Parallel implementations increase the complexity of application design. Current languages force the programm

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8

Goodwin, Andrew Keith. "One dimensional compression behaviour of unsaturated granular soils at low stress levels." Thesis, University of Sheffield, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336260.

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9

Galang, Kevin Mathew Lopez. "AN EXPERIMENTALLY GENERATED CONSTITUTIVE MODEL FOR PEAK STRESS (σ_peak) IN COMPRESSION SAMPLES". DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/940.

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The hot working behavior of AISI 1018 steel was studied by hot-compression deformation tests on the Gleeble 1500 thermo-mechanical simulator at true strain values of -0.143 and -0.405, true strain rate values of 0.01 and 0.1, and working temperatures of 900°C and 1000°C. The tests show that a lower working temperature and lower true strain value results in a greater maximum compressive force. The apparent activation energy Qapp was calculated by using the Zener-Hollomon parameter combined with the low stress law. Qapp was calculated to be 311 kJ mol-1 K-1.

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10

Jonsson, Åsa, and Grim Skarsgård. "Synchrotron tomography of pressboard during in-situ compression loading : Construction of compression rig, image acquisition procedure and methods for image processing." Thesis, Uppsala universitet, Tillämpad mekanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257276.

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Pressboard, a high density cellulose-based material used for insulation in high voltage power transformers, exhibits stress relaxation during compressive loading. Investigating the micro-mechanical mechanisms responsible for the relaxation can lead to modifications of the production process to control the behaviour of the material. This investigation can be done using Synchrotron X-ray micro Computed Tomography which provides sufficient temporal and spatial resolutions to capture the stress relaxation process. In the present thesis, a compression rig for in-situ mechanical loading during X-ray

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11

Gordons, Temofebi G. "Stress relaxation behaviour in compression and some other mechanical properties of thermoplastic-elastomer." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/6942.

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Thermoplastic elastomers have been found to have unsual properties, a consequence of composition and structure. The molecular composition comprises hard thermoplastic blocks which aggregate into domains, and flexible elastomer blocks in a linear or inter-penetrating structure. The mechanical properties such as stress relaxation, tensile strength, elongation, recovery and hardness of some thermopastic elatomers have been studied in some detail. The stress relaxation studies have been made possible with the development of the stress relaxation measuring equipment at the Institute of Polymer Tech

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12

Lynch, Colum James. "A finite element study of the postbuckling behaviour of a typical aircraft fuselage panel." Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343003.

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13

Smyth, Patrick A. "Viscoelastic behavior of articular cartilage in unconfined compression." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47656.

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Previous decades of cartilage research have predominantly focused on decoupling the solid and fluid interactions of the mechanical response. The resulting biphasic and triphasic models are widely used in the biomechanics community. However, a simple viscoelastic model is able to account for the stress-relaxation behavior of cartilage, without the added complexity of solid and fluid interactions. Using a viscoelastic model, cartilage is considered a single material with elastic and dissipative properties. A mechanical characterization is made with fewer material parameters than are required

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14

Thomas, William Iwan. "The effects of material characteristics on the compression and properties of dry coated tablets." Thesis, University of Sunderland, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264762.

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15

Van, Schalkwyk Francois. "The influence of specimen size on the compression stress block parameters of reinforced concrete." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/62799.

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The stress-strain distribution in flexural compression has been at the forefront of investigation ever since the 20th century. The original formulation of the flexural stress-strain distribution and the subsequent development of the stress block parameters, were based on specimens with a 127 x 203 mm (4 x 8 in.) cross section. The design of reinforced concrete flexural and flexural compression members at the Ultimate Limit State is based on the equilibrium of forces and moments obtained by using these stress block parameters. The calculation procedure entails the determination of the neutral a

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16

Contini, Manuel. "Effetti dei parametri geometrici nella compressione di strutture “lattice”." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14713/.

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L’obiettivo di questo elaborato è creare e raccogliere una serie di dati e conoscenze relative alle strutture lattice, tramite un lavoro di ricerca su testi affini alla materia e online su siti specializzati, al fine di offrire un documento riassuntivo di tutti i punti focali indispensabili nello studio di simulazioni numeriche a compressione di strutture lattice. Altra parte del lavoro consiste nel creare, attraverso le esperienze acquisite man mano, una serie di passaggi, analizzati singolarmente in un software commerciale agli elementi finiti, da effettuare per importare progetti, inserire

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17

Pedroso, Gabriel Orquizas Mattielo. "Avaliação da superfície deformada de geomembrana de PEAD sob camadas de proteção por meio do ensaio de compressão estática." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-24102017-091726/.

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Nos sistemas de revestimento de fundo de aterros sanitários e pilhas de rejeito de mineração, é comum utilizar geotêxtil não-tecido para a proteção ao puncionamento da geomembrana por objetos pontiagudos como a brita. Neste trabalho, realiza-se um estudo experimental a fim de avaliar a superfície deformada de geomembrana de PEAD, com 2 mm de espessura, em camada de proteção sujeita a carregamentos de 600 kPa e 1800 kPa ao longo de 100 h, com o objetivo de simular danos mecânico de operação. Para a leitura da superfície deformada da geomembrana utilizou-se um lençol de chumbo localizado sob a g

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18

Djukic, Stéphanie. "Damage mechanisms under tensile stress of amorphous and low semi-crystalline polymers." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSE1041.

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Ces dernières années, une nouvelle classe de polyamides a été développée pour des applications spécifiques nécessitant de meilleures propriétés mécaniques et thermiques, telles que l’électronique ou l’industrie automobile. Les polyphtalamides (PPA) sont des polyamides semi-aromatiques, contenant des cycles aromatiques dans leur chaine principale. Récemment, les mécanismes d’endommagement ont été étudiés dans le cas de polymères semi-cristallins (PA66) et amorphes (acétate de cellulose). Le but de la thèse a été d’étudié les mécanismes d’endommagement de polymères amorphes et semi-cristallins.

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19

LIU, JIANNING. "Understand the mechanical behaviors of polymer glasses under extension and compression." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1542042896236543.

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20

Forrester, Hsuan-Hsiou. "High strain rate compression testing of polymers : PTFE, PCTFE, PVC and PMMA." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/13624.

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The mechanically compressive flow stress sensitivities of various polymers are investigated at high strain rates above 103 s-1. Temperatures near the glass transition temperature are investigated and the polymer stress-strain responses have been studied from ambient temperature to 100°C. Previous work has reported peaks in flow stress as a function of strain rate [Al-Maliky/Parry 1994, Al-Maliky 1997]. The analyses showed rapid increases of flow stress followed by a sudden drop at elevated strain rates, which is unlike the well known linear relationship documented at the low strain rates. The

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21

Jain, Anurag. "Experimental study and numerical analysis of compression molding process for manufacturing precision aspherical glass lenses." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1148650470.

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22

Schonken, Nico. "Buffering strategies and bandwidth renegotiation for MPEG video streams." Thesis, Rhodes University, 1999. http://hdl.handle.net/10962/d1006620.

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This paper confirms the existence of short-term and long-term variation of the required bandwidth for MPEG videostreams. We show how the use of a small amount of buffering and GOP grouping can significantly reduce the effect of the short-term variation. By introducing a number of bandwidth renegotiation techniques, which can be applied to MPEG video streams in general, we are able to reduce the effect of long-term variation. These techniques include those that need the a priori knowledge of frame sizes as well as one that can renegotiate dynamically. A costing algorithm has also been introduce

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23

Vogtmann, Dana E. "Stress relaxation in poly(methyl methacrylate) (PMMA) during large-strain compression testing near the glass transition temperature." Connect to resource, 2009. http://hdl.handle.net/1811/36980.

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24

Forsgren, Gustav. "Multiple Synchronized Video Streams on IP Network." Thesis, Linköpings universitet, Informationskodning, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-108491.

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Video surveillance today can look very different depending on the objective and on the location where it is used. Some applications need a high image resolution and frame rate to carefully analyze the vision of a camera, while other applications could use a poorer resolution and a lower frame rate to achieve it's goals. The communication between a camera and an observer depends much on the distance between them and on the contents. If the observer is far away the information will reach the observer with delay, and if the medium carrying the information is unreliable the observer has to have th

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25

Katzenberger, Jr Michael J. "Effects of Sex, Strain Rate, and Age on the Tensile and Compressive Material Properties of Human Rib Cortical Bone." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/102889.

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The objective of this study was to evaluate the effects of sex, loading rate, and age on the tensile and compressive material properties of human rib cortical bone over a wide range of subject demographics. Tension coupons were tested from sixty-one (n = 61) subjects (M = 32, F = 29) ranging in age from 17 to 99 years of age (Avg. = 56.4 +/- 26.2 yrs.). Compression samples were tested from thirty (n = 30) subjects (M = 19, F = 11) ranging in age from 18 to 95 years of age (Avg. = 49.0 +/- 23.9 yrs.). For each subject, one coupon/sample was tested to failure on a material testing system at a ta

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26

Comstedt, Erik. "Effect of additional compression features on h.264 surveillance video." Thesis, Mittuniversitetet, Avdelningen för informationssystem och -teknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-30901.

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In video surveillance business, a recurring topic of discussion is quality versus data usage. A higher quality allows for more details to be captured at the cost of a higher bit rate, and for cameras monitoring events 24 hours a day, limiting data usage can quickly become a factor to consider. The purpose of this thesis has been to apply additional compression features to a h.264 video steam, and evaluate their effects on the videos overall quality. Using a surveillance camera, recordings of video streams were obtained. These recordings had constant GOP and frame rates. By breaking down one of

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Carpenter, John Stuart. "Estimates of Interfacial Properties in Cu/Ni Multilayer Thin Films using Hardness and Internal Stress Data." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1285006915.

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28

Lee, Jung Hoon. "Local buckling behaviour and design of cold-formed steel compression members at elevated temperatures." Thesis, Queensland University of Technology, 2004. https://eprints.qut.edu.au/15972/1/Jung_Hoon_Lee_Thesis.pdf.

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The importance of fire safety design has been realised due to the ever increasing loss of properties and lives caused by structural failures during fires. In recognition of the importance of fire safety design, extensive research has been undertaken in the field of fire safety of buildings and structures especially over the last couple of decades. In the same period, the development of fire safety engineering principles has brought significant reduction to the cost of fire protection. However the past fire research on steel structures has been limited to heavier, hot-rolled structural steel me

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29

Lee, Jung Hoon. "Local buckling behaviour and design of cold-formed steel compression members at elevated temperatures." Queensland University of Technology, 2004. http://eprints.qut.edu.au/15972/.

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The importance of fire safety design has been realised due to the ever increasing loss of properties and lives caused by structural failures during fires. In recognition of the importance of fire safety design, extensive research has been undertaken in the field of fire safety of buildings and structures especially over the last couple of decades. In the same period, the development of fire safety engineering principles has brought significant reduction to the cost of fire protection. However the past fire research on steel structures has been limited to heavier, hot-rolled structural steel me

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30

Tung, David C. "Welding Metallurgy of Nickel-Based Superalloys for Power Plant Construction." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449164834.

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31

Ranawaka, Thanuja. "Distortional buckling behaviour of cold-formed steel compression members at elevated temperatures." Thesis, Queensland University of Technology, 2006. https://eprints.qut.edu.au/16417/6/Thanuja_Ranawaka_Thesis.pdf.

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In recent times, light gauge cold-formed steel sections have been used extensively in residential, industrial and commercial buildings as primary load bearing structural components. This is because cold-formed steel sections have a very high strength to weight ratio compared with thicker hot-rolled steel sections, and their manufacturing process is simple and cost-effective. However, these members are susceptible to various buckling modes including local and distortional buckling and their ultimate strength behaviour is governed by these buckling modes. Fire safety design of building st

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32

Ranawaka, Thanuja. "Distortional buckling behaviour of cold-formed steel compression members at elevated temperatures." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16417/.

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In recent times, light gauge cold-formed steel sections have been used extensively in residential, industrial and commercial buildings as primary load bearing structural components. This is because cold-formed steel sections have a very high strength to weight ratio compared with thicker hot-rolled steel sections, and their manufacturing process is simple and cost-effective. However, these members are susceptible to various buckling modes including local and distortional buckling and their ultimate strength behaviour is governed by these buckling modes. Fire safety design of building st

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33

Dongare, Vishal S. "Hot Extrusion of Carbon Nanotube - Magnesium Matrix Composite Wire." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1415975904.

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34

Heva, Yasintha Bandula. "Behaviour and design of cold-formed steel compression members at elevated termperatures." Queensland University of Technology, 2009. http://eprints.qut.edu.au/29310/.

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Cold-formed steel members have been widely used in residential, industrial and commercial buildings as primary load bearing structural elements and non-load bearing structural elements (partitions) due to their advantages such as higher strength to weight ratio over the other structural materials such as hot-rolled steel, timber and concrete. Cold-formed steel members are often made from thin steel sheets and hence they are more susceptible to various buckling modes. Generally short columns are susceptible to local or distortional buckling while long columns to flexural or flexural-torsional b

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Heva, Yasintha Bandula. "Behaviour and design of cold-formed steel compression members at elevated temperatures." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/29310/1/Yasintha_Heva_Thesis.pdf.

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Cold-formed steel members have been widely used in residential, industrial and commercial buildings as primary load bearing structural elements and non-load bearing structural elements (partitions) due to their advantages such as higher strength to weight ratio over the other structural materials such as hot-rolled steel, timber and concrete. Cold-formed steel members are often made from thin steel sheets and hence they are more susceptible to various buckling modes. Generally short columns are susceptible to local or distortional buckling while long columns to flexural or flexural-torsional b

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36

Miyashita, Elcio Ricardo. "Avaliação das tensões ósseas geradas por prótese obturadora maxilar classe IV de Aramany por meio da análise de elementos finitos." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/23/23144/tde-08042009-151055/.

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O tratamento cirúrgico do câncer bucal pode resultar em graves seqüelas das estruturas anatômicas envolvidas na fisiologia da cavidade bucal. A extensão e a localização da ressecção cirúrgica, assim como a condição dental, são determinantes do planejamento da prótese obturadora. Este trabalho emprega a Análise de Elementos Finitos para o estudo do comportamento biomecânico de uma prótese obturadora maxilar Classe IV de Aramany, em um modelo digital desenvolvido a partir de uma TC de um indivíduo adulto. O modelo tridimensional desenvolvido no programa Rhinoceros® versão 3.0 foi utilizado para

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Conroy, Michael W. "Density Functional Theory Studies of Energetic Materials." Scholar Commons, 2009. http://scholarcommons.usf.edu/etd/3691.

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First-principles calculations employing density functional theory (DFT) were performed on the energetic materials PETN, HMX, RDX, nitromethane, and a recently discovered material, nitrate ester 1 (NEST-1). The aims of the study were to accurately predict the isothermal equation of state for each material, improve the description of these molecular crystals in DFT by introducing a correction for dispersion interactions, and perform uniaxial compressions to investigate physical properties that might contribute to anisotropic sensitivity. For each system, hydrostatic-compression simulations were

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38

CAO, WEI. "Adoucissement cyclique des aciers et relaxation des contraintes residuelles de grenaillage en fatigue." Paris, ENSAM, 1989. http://www.theses.fr/1989ENAM0002.

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Une nouvelle methode est proposee pour decrire la modification de la loi d'ecrouissage de la couche superficielle affectee par grenaillage. Etude experimentale. Evolution des contraintes residuelles prevue par le modele

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Rainone, Corrado. "Following the evolution of metastable glassy states under external perturbations : compression and shear-strain." Thesis, Paris, Ecole normale supérieure, 2015. http://www.theses.fr/2015ENSU0051/document.

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On considère l'évolution adiabatique des états vitreux sous perturbations extérieures. Bien que le formalisme que nous utilisons soit très général, nous nous concentrons ici sur les sphères dures en dimension infinie où une analyse exacte est possible. Nous considérons perturbations de la frontière, notamment compression ou cisaillement simple et nous calculons la réponse des états vitreux à ces perturbations : pression et contrainte de cisaillement. Nous constatons un dépassement des deux quantités avant que l'état vitreux ne devienne instable à un point spinodal, où il fond dans le liquide (

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Surano, Dominic E. "The Effectiveness of Damage Arrestment Devices in Delaying Fastener-Hole Interaction Failures in Carbon Fiber Polyurethane Foam Composite Sandwich Panels Subjected to Static and Dynamic Loading Under Increased Temperatures." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/436.

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A study was conducted to investigate simple, cost-effective manufacturing techniques to delay skin-core delamination, micro-buckling and bearing stress failures resulting from fastener-hole interactions. Composite sandwich panels, with and without damage arrestment devices (DADs), were subjected to monotonic compression at a rate of 5mm per second, and compression-compression fatigue at 50% yield at an amplitude of 65%, under temperatures of 75, 100, 125, 150, 175, and 200 °F. The sandwiches tested were composed of two-layer cross-weave carbon fiber facesheets, a polyurethane foam core, and an

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Brown, Michelle M. "Hardware study on the H.264/AVC video stream parser /." Online version of thesis, 2008. http://hdl.handle.net/1850/7766.

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42

Gonzales, Manny. "The mechanochemistry in heterogeneous reactive powder mixtures under high-strain-rate loading and shock compression." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54393.

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This work presents a systematic study of the mechanochemical processes leading to chemical reactions occurring due to effects of high-strain-rate deformation associated with uniaxial strain and uniaxial stress impact loading in highly heterogeneous metal powder-based reactive materials, specifically compacted mixtures of Ti/Al/B powders. This system was selected because of the large exothermic heat of reaction in the Ti+2B reaction, which can support the subsequent Al-combustion reaction. The unique deformation state achievable by such high-pressure loading methods can drive chemical reactions

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Bergström, Roger. "Fibre flow mechanisms." Doctoral thesis, KTH, Fiber- och polymerteknik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240.

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The flow behaviour, and primarily the floc-floc interaction, of pulp paper suspensions have been studied visually. Analogy models based on these observations have been developed as well as the identification of important parameters of floc break-up in low shear rate flow fields. Floc compressions and the locations of voids (areas of lower fibre concentration) where found to influence the floc splitting mechanism. Based on this investigation an equipment for measuring the load carrying ability of fibre flocs and networks was designed, and the effect of measurement geometry, network structure an

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Malanotte, Jessica Aline. "Efeito do laser de baixa potência na regeneração nervosa periférica, em ratos wistar com doença periodontal induzida." Universidade Estadual do Oeste do Paraná, 2018. http://tede.unioeste.br/handle/tede/3819.

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Submitted by Neusa Fagundes (neusa.fagundes@unioeste.br) on 2018-07-11T19:45:29Z No. of bitstreams: 2 Jessica_Malanotte2018.pdf: 2658956 bytes, checksum: e539d867d61d9c4b845d2d201bec0c78 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made available in DSpace on 2018-07-11T19:45:29Z (GMT). No. of bitstreams: 2 Jessica_Malanotte2018.pdf: 2658956 bytes, checksum: e539d867d61d9c4b845d2d201bec0c78 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-03-23<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superi

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Wigent, Mark A., Andrea M. Mazzario, and Scott M. Matsumura. "Use of Multi-Threading, Modern Programming Language, and Lossless Compression in a Dynamic Commutation/Decommutation System." International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595662.

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ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada<br>The Spectrum Efficient Technology Science and Technology (SET S&T) Program is sponsoring the development of the Dynamic Commutation and Decommutation System (DCDS), which optimizes telemetry data transmission in real time. The goal of DCDS is to improve spectrum efficiency - not through improving RF techniques but rather through changing and optimizing contents of the telemetry stream during system test. By

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Ali, Ghada Abdulbaqi. "Temperature Dependency of the Rheological Properties and Strength of Cemented Paste Backfill That Contains Sodium Silicate." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/41985.

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Over the past decades, cemented paste backfill (CPB) has become a common, environmentally friendly method of managing mine wastes (such as tailings). This technology allows up to 60% of the total amount of tailings to be reused and filled in the mine stopes after converting them into cemented material. Beside reducing the environmental risks associated with the traditional disposal of these materials, turning them into cemented material and placing them in the underground mine stopes can also provide secondary support for these stopes in addition to minimizing the risk of ground subsidence in

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Sengor, Mahmut Yavuz. "The Deformation Characteristics Of Deep Mixed Columns In Soft Clayey Soils: A Model Study." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613075/index.pdf.

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Deep Mixing involves the introduction of cementitious or specially formulated solutions directly into the ground through the use of purpose built blending injection augers. The system is mainly designed to increase strength and reduce compressibility of treated soil. In the first stage of the research effective mixture ratios and mixture types of stabilizing agents were investigated for soft clays (CL form Eymir lake and kaolinite) by means of unconfined compression (UC) tests on stabilized soils. The unconfined compressive strength (UCS) values were obtained for 7,28,90 and 365 days of curing

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Petráčková, Klára. "Stanovení modulu pružnosti v tahu tenké vrstvy - numerická analýza zkoušky mikrokompresního vzorku a "bulge testu"." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230777.

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Determination of mechanical properties of very thin films is rather difficult task as all of currently using testing techniques have some weakness. This master’s thesis deals with microcompressive test and bulge test. Finite element simulations of the two methods were carried out in order to better understanding of experimental record. Microcompression combines the sample preparation with the use of focused ion beam (FIB) with a compression test carried out using nanoindenter. Cylindrical specimens (pillars) were prepared from Al film deposited on Si substrate using FIB. Experimentally measure

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Masson, Isabelle. "Détermination des propriétés mécaniques en fluage a haute température et étude des microstructures de déformation de céramiques a base de nitrure d'aluminium." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL136N.

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En vue d'applications en sidérurgie dans les nouveaux procédés de coulée continue de bandes minces, plusieurs céramiques à base de nitrure d'aluminium (AlN fritte (SAlN), AlN presse a chaud (HPAlN) et composites al#2o#3-AlN) ont été déformées en compression uniaxiale soit sous contrainte constante (150-250 MPa) soit à vitesse de déformation imposée (5. 10##6s##1) à des températures variant de 1200 à 1650c puis caractérisées en microscopie électronique à balayage, en microscopie électronique à transmission et par analyse EDX. En fluage a charge constante, la vitesse de déformation est proportio

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Cheneau-Späth, Nadine. "Comportement de monocristaux et de polycristaux de métaux hexagonaux en grandes déformations plastiques : compression plane du titane et du magnésium." Grenoble INPG, 1996. http://www.theses.fr/1996INPG4201.

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La modélisation de l'évolution des textures de déformation des métaux hexagonaux, tels que le titane et le magnésium, et de l'anisotropie plastique des tôles manufacturées nécessitent la connaissance de leur comportement plastique lors des opérations classiques de mise en forme. Pour ce faire, nous caractérisons expérimentalement les mécanismes de déformation mis en jeu au cours de l'essai de compression plane sur plusieurs orientations de monocristaux de titane déformés à l'ambiante et de magnésium déformés à l'ambiante et à 400°C, en conditions de glissement et de maclage multiple, que nous

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