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Dissertations / Theses on the topic 'Dowex'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Oliveira, Silvia Priscila Dias de. "Remoção do corante Azul Reativo 5G utilizando o adsorvente comercial Dowex Optipore SD-2." Universidade Estadual do Oeste do Parana, 2013. http://tede.unioeste.br:8080/tede/handle/tede/1850.

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Made available in DSpace on 2017-07-10T18:08:03Z (GMT). No. of bitstreams: 1 Silvia P Dias de Oliveira.pdf: 1230611 bytes, checksum: a3c50b4c24862ccdb82c63279b67c320 (MD5) Previous issue date: 2013-02-21<br>Fundação Araucária<br>In this work, removal of Reactive Blue 5G dye using a commercial Dowex Optipore SD-2 adsorbent was investigated regarding variations on pH (1-12), temperature (20-50oC) and shaking (90-200 rpm) values in order to establish best adsorption conditions. The point of zero charge (pcz) was determined varying solution pH from 2 to 12 and defining the pH range where the a

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2

Tomotani, Ester Junko. "Imobilização da invertase em resina de troca iônica (tipo Dowex®): seu uso na modificação da sacarose." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/9/9134/tde-16082017-104536/.

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A invertase comercial (Bioinvert®) foi imobilizada por adsorção em resinas aniônicas do tipo Dowex® [1x8:50-400, 1x4:50-400 e 1x2:100-400, todos copolímeros estireno-divinilbenzênicos, porém de granulometria (50-400 mesh) e quantidades de ligações cruzadas diferentes (2-8%)] em meio aquoso. A melhor percentagem de adsorção da invertase nas resinas foi observada em pH 5,5 a 32°C, tendo o complexo Dowex®1x4-200/lnvertase apresentado índice de adsorção e coeficiente de imobilização iguais a 100%. Os parâmetros cinéticos e termodinâmicos foram determinados para a invertase solúvel e insolúvel de B

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3

Singare, Pravin U. "Ion-Isotopic exchange reaction kinetics in characterization of anion exchange resins Dowex 550A LC and Indion-820." Diffusion fundamentals 19 (2013) 4, S. 1-21, 2013. https://ul.qucosa.de/id/qucosa%3A13706.

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The present paper involves application of nondestructive radioactive tracer technique in characterization of Dowex 550A LC and Indion-820 anion exchange resins. The characterization study was based on kinetic of exchange reactions between inactive iodide/bromide ions on the resins with radioactive iodide/bromide ions in the solution. During iodide exchange reaction performed at a constant temperature of 40.00C, using 1.000 g of ion exchange resins and labeled iodide ion solution of concentration 0.003 mol/L, for Dowex 550A LC resin the specific reaction rate and initial rate of ion exchange wa

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4

Singare, Pravin U. "Ion-Isotopic exchange reaction kinetics in characterization of anion exchange resins Dowex 550A LC and Indion-820." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-184151.

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The present paper involves application of nondestructive radioactive tracer technique in characterization of Dowex 550A LC and Indion-820 anion exchange resins. The characterization study was based on kinetic of exchange reactions between inactive iodide/bromide ions on the resins with radioactive iodide/bromide ions in the solution. During iodide exchange reaction performed at a constant temperature of 40.00C, using 1.000 g of ion exchange resins and labeled iodide ion solution of concentration 0.003 mol/L, for Dowex 550A LC resin the specific reaction rate and initial rate of ion exchange wa

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5

Marin, Pricila. "Remoção do corante azul reativo 5G em coluna de leito fixo empacotada com adsorvente comercial Dowex Optipore SD-2." Universidade Estadual do Oeste do Parana, 2013. http://tede.unioeste.br:8080/tede/handle/tede/1839.

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Made available in DSpace on 2017-07-10T18:08:00Z (GMT). No. of bitstreams: 1 Pricila Marin.pdf: 1721834 bytes, checksum: 790969eaadbb69bda0b5eb70eab2d4e9 (MD5) Previous issue date: 2013-02-19<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In this work the adsorption process of the dye Reactive Blue 5G using commercial adsorbent Dowex Optipore SD-2 was evaluated. Experiments in a closed and batch system were carried out to evaluate the effect of solution pH (1 - 12), system temperature (30, 40 and 50 °C) and the particle diameter of the adsorbent (0.01 - 0.12 cm, 0.05 - 0

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6

Perez, Isadora Dias. "Recuperação de cobre de uma solução sintática baseada no licor de lixiviação atmosférica do minério limonítico de níquel por troca iônica utilizando a resina quelante Dowex." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-04052018-142357/.

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Em virtude das várias aplicações do cobre, acredita-se que a demanda por esse metal irá aumentar nos próximos anos, e consequentemente, o seu preço. Dessa forma, as mineradoras enfrentam o desafio de aprimorar e aperfeiçoar os processos produtivos a fim de atender sua futura demanda. Frações de cobre podem ser encontradas no licor de lixiviação do minério limonítico de níquel e a troca iônica com adsorvente sólido é uma das tecnologias disponíveis para promover a sua recuperação e o seu reaproveitamento. O presente trabalho teve como objetivo estudar o processo de adsorção dos íons de cobre pr

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7

Motamarri, Sri Vani Sirisha. "Dowel-concrete contact characteristics." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=3032.

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Thesis (M.S.)--West Virginia University, 2003.<br>Title from document title page. Document formatted into pages; contains xiv, 114 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 102-104).

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8

Walters, Shane A. "Field performance of dowel bars." Ohio : Ohio University, 1999. http://www.ohiolink.edu/etd/view.cgi?ohiou1175281160.

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9

Harrington, John Francis. "Comparison of alternative laboratory dowel bar testing procedures." [Ames, Iowa : Iowa State University], 2006.

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10

Němeček, Tomáš. "Svařování jemnozrnných ocelí typu DOMEX vláknovým YbYAG laserem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230093.

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The project elaborated within the engineering studies of the branch Manufacturing technology presents an experiment of welding of high strength steel by fiber laser. The project includes a theoretical study, which deals with the welding material properties, principles and types of lasers and laser welding technology. The practical part contains a verification of the welding parameters according to the standard ČSN EN ISO 15614-11. The final evaluation results of the experiment at the close of the project are presented.

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11

Gjata, Marjus. "Seismic Behavior of Dowel Type Precast Panel-Foundation Connection." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Precast concrete panels are a popular construction technique due to their increased construction speed, low cost and the ability to use the precast concrete elements for structural walls to provide high strength and stiffness when used for structural purposes. Slender precast concrete wall panels are a common construction method for single storey warehouse type buildings. Following the Canterbury earthquake sequence Christchurch from 2010 – 2014, damage was observed in precast concrete wall buildings that resulted in out-of-plane collapse of wall panels. . This project seeks to investigate th

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12

Sjödin, Johan. "Steel-to-timber dowel joints : Influence of moisture induced stresses." Licentiate thesis, Växjö University, School of Technology and Design, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1286.

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<p>Joints are critical parts of timber structures, transmitting static and dynamic forces between structural members. The ultimate behavior of a loaded building depends strongly on the structural configuration and the capacity of the joints. The collapse of a whole building or less extensive accidents that may occur is usually starting as a local failure inside or in the vicinity of a joint. Such serious failures have recently occurred in our Nordic countries. Especially the collapse of two large glued laminated timber structures clearly indicates the need of an improved joint design. The tren

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13

Jin, Hui, and Hao Wu. "Finite Element Modelling of Fracture in dowel-type timber connections." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-34783.

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Dowel-type steel to timber connections are commonly used in timber structure. The load carrying capacity and the stress distribution within the connection area are complicated and the failure behavior of a connection depends on many parameters. The main purpose of this thesis was to verify, using the data obtained from previous experiments, the conventional design method of European Code 5(EC5) (hand calculation) for dowel type joints subjected to pure bending moment and other alternative design methods based on the finite element method (FEM) including the use of the mean stress approach and

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14

Reynolds, Thomas Peter Shillito. "Dynamic behaviour of dowel-type connections under in-service vibration." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608327.

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This study investigated the vibration serviceability of timber structures with dowel-type connections. It addressed the use of such connections in cutting-edge timber structures such as multi-storey buildings and long-span bridges, in which the light weight and flexibility of the structure make it possible that vibration induced by dynamic forces such as wind or footfall may cause discomfort to occupants or users of the structure, or otherwise impair its intended use. The nature of the oscillating force imposed on connections by this form of vibration was defined based on literature review and

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15

Riad, Mourad Y. "Stress concentration around dowel bars in jointed rigid concrete pavements." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1810.

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Thesis (M.S.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains x, 138 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 125-129).

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16

William, Gergis W. "Effect of temperature variations on premature cracking of dowel jointed concrete pavements." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=3015.

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Thesis (Ph. D.)--West Virginia University, 2003.<br>Title from document title page. Document formatted into pages; contains viii, 139 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 123-139).

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17

Kosinka, Jakub. "Studium vlastností laserových svarů materiálu Domex 700 MC při využití obloukového předehřevu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378998.

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This thesis deals with the study of influence of preheating/reheating by TIG arc method in the laser welding process of Domex 700 MC fine-grained steel through the evaluation of laser-welds properties, respectively properties of welds made by laser-TIG hybrid technology. The main part of this thesis is experiment, in which Domex 700 MC plates 3 mm thick were welded – first using laser itself, then using laser with arc preheating and finally using laser with arc reheating. The variable parameter during the processes preheating or reheating was distance of TIG tungsten electrode and laser beam (

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18

Novotný, Michal. "Studium vlastností laserových svarů materiálu Domex 460 MC při využití obloukového předehřevu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399305.

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This diploma thesis deals with weldability of Domex 460 MC material. There are two welding methods and three other welded materials in heterogenous connection which will be researched in this diploma thesis. The welding methods are fiber solid-state laser and a new method of hybrid welding called laser – TIG. The other materials are Domex 700 MC, S355J2 and DC01. Domex 460 MC is a high-strenght steel with fine-grained structure. During the welding process the imput heat decreases mechanical properties of the materials. This effect is caused by material seeds growing. From these samples (which

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19

Ekenståhl, Robert, and Oskar Medén. "Vilken hållfasthet har ett trädymlingsförband?" Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-24398.

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Ett sätt att öka mängden trä i byggnader är att ersätta stålförband i takstolar med ett trädymlingsförband. Det bör dock undersökas om trädymlingsförbandet har tillräckligt högt hållfasthetsvärde. Denna studie undersöker hållfastheten på träförband förankrade med trädymlingar. Dymlingarna har tre olika dimensioner (8, 10 och 12 mm) och förankras i förbanden genom svällning. Teoretiska beräkningar utförs med formler från Eurokod 5 (2004) för stålskruvar. Formlerna modifieras för att kunna tillämpas på trä istället för stål. Trycktester utförs på tio tvåplansskjuvnings-modeller per dymlingsdimen

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20

Al-Humeidawi, Basim Hassan Shnawa. "Evaluation of the performance of GFRP dowels in Jointed Plain Concrete Pavement (JPCP) for road/airport under the combined effect of dowel misalignment and cyclic wheel load." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/evaluation-of-the-performance-of-gfrp-dowels-in-jointed-plain-concrete-pavement-jpcp-for-roadairport-under-the-combined-effect-of-dowel-misalignment-and-cyclic-wheel-load(3a25c529-04ea-4899-8b7a-64bcfc450809).html.

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Dowel bars are provided at the transverse joints of the Jointed Plain Concrete Pavement (JPCP) to transfer the load between adjoining slabs and to allow for expansion and contraction of the pavement due to temperature and moisture changes. The current study involved evaluation of the performance of Glass Fibre Reinforced Polymer (GFRP) dowels in JPCP as an alternative to the conventional epoxy-coated steel dowel bars, especially in the presence of dowel misalignment. This research involved two main sets of experimental tests. The first set focused on the evaluation of load-deflection response

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21

Hong, Jung-Pyo. "Three-dimensional nonlinear finite element model for single and multiple dowel-type wood connections." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/364.

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A new three-dimensional finite solid element (3D FE) model for dowel-type wood connections was developed using the concept of a beam on a nonlinear wood foundation, which addresses the intricate wood crushing behaviour under the connector in a dowel type connection. In order to implement the concept of wood foundation with solid elements, a 3D FE wood foundation model was defined within a prescribed foundation zone surrounding the dowel. Based on anisotropic plasticity material theory, the material model for the foundation zone was developed using effective foundation material constants that w

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22

Buranadham, Supanee. "Dowel design optimization in an endodontically treated single-rooted tooth a finite element stress analysis /." Diss., University of Iowa, 2000. http://ir.uiowa.edu/etd/191.

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Thesis (Ph. D.)--University of Iowa, 2000.<br>Supervisor: Clark M. Stanford. Title-page, preliminaries, Certificate of approval, Table of contents and Project summary issued in paper (xii, 13 leaves ; 28 cm.). Includes bibliographical references. Also issued on CD-ROM (144 files, 33.7 megabytes).

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23

Yang, Jiaqi, and 楊家琦. "Influence of strengthening and repair schemes on dowel type timber joints and moment resisting frames." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/195963.

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Timber has been a widely used construction material throughout the history of human development and it is still popular to this day. Timber frames are a common structural form used in historical and modern day structures. An effective means to connect timber members together is via bolts or dowels due to their high strength, ductile behaviour and flexibility in application. Such joints are, however, vulnerable and prone to damage especially during seismic attacks. In order to improve the performance and longevity of timber framed structures, it is necessary to develop simple but effective stre

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24

Muñoz, García Marina, and Sierra Juan Carlos Hurtado. "Structural analysis of the 17th century warship Vasa : Influence of the dowels on the stiffness of the hull." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-10114.

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After 333 years under depths of the Baltic Sea, the warship Vasa was salvaged and nowadayslies in a dry dock inside the Vasa Museum in Stockholm. Its current support system, which consists on eighteen cradle-stanchions pairs of steel, is not able to handle the present loads in a satisfactory manner. Experimental tests showed that the Vasa's hull is gradually deforming mainly due to creep behavior. Thus, in order to preserve the Vasa for future generations, a new support system has to be implemented in a foreseeable future. There are several factors to take into consideration for its constructi

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25

Kochkin, Vladimir G. "Analysis and Testing of a Ready-to-Assemble Wood Framing System." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/35038.

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The concept of a ready-to-assemble kit fabricated in a factory and delivered to the customer is well known and commonly used by the furniture industry. In wood construction, the lack of a simple and reliable method of assembling the frame members creates a barrier to wide acceptance of prefabricated kit structures. This thesis focuses on a novel technology of assembling structural components of a wood frame using a metal nail plate connector (NPC). This technology was referred to as a ready-to-assemble (RTA) wood framing system. The RTA system simplifies the framing process and allows for rapi

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26

Andersson, Martin, Andreas Jonsson, and Niklas Nyström. "Insvällning av olimmade och limmade trädymlingar." Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-29779.

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Trä är ett förnybart material till skillnad mot många andra byggnadsmaterial. Andelen trä inom byggnadsindustrin kan ökas genom att använda trädymlingsförband som ett substitut till skruvar och spikar. Skruvar och spikar tillverkas av metaller, vilka inte är förnybara material. Tillverkningsprocessen av metallbaserade material är mer energikrävande än den för trämaterial och har därför en större inverkan på vår miljö.Syftet med studien var att undersöka vidhäftningskapaciteten hos trädymlingsförband, olimmade och limmade av träslagen bok och furu. Fastsättningen av de olimmade trädymlingarna g

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27

Nelson, Alexandra T. "Press fit design : force and torque testing of steel dowel pins in brass and nylon samples." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/36722.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, February 2006.<br>Includes bibliographical references.<br>An experimental study was conducted to determine the accuracy of current press fit theory when applied to press fit design. Brass and nylon hex samples were press fitted with hardened steel dowel pins. Press fit force and torque required to induce slipping were measured experimentally. Sample dimensions and material properties were utilized to predict expected force and torque levels, which were then measured experimentally. Brass press fit forces pro

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28

Fahmy, Michel Ramsis. "Finite element modeling of dowel jointed plain concrete pavement response to thermal and moving traffic loads." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1582.

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Thesis (Ph. D.)--West Virginia University, 2000.<br>Title from document title page. Document formatted into pages; contains xvi, 228 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 217-227).

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29

Sjödin, Johan. "Strength and Moisture Aspects of Steel Timber Dowel Joints in Glulam Structures : An Experimental and Numerical Study." Doctoral thesis, Växjö universitet, Institutionen för teknik och design, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-2002.

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Joints are critical parts of timber structures, transmitting static and dynamic forces between structural members. The ultimate behavior of e.g. a building depends strongly on the structural configuration and the capacity of its joints. The complete collapse of a building or other less extensive accidents that may occur usually start as a local failure inside or in the vicinity of a joint. Such serious failures have recently occurred in the Nordic countries. Especially the collapses of two large glued-laminated timber (glulam) structures clearly indicate the need of an improved joint design. T

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Shahani, Purnima Joan. "THE BOND STRENGTH OF ADHESIVE RESIN CEMENT: TIME DIFFERENTIAL BETWEEN CEMENTATION AND FINISHING OF CAST DOWEL-CORES." VCU Scholars Compass, 2003. http://scholarscompass.vcu.edu/etd/1149.

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THE BOND STREGTH OF ADHESIVE RESIN CEMENT: TIME DIFFERENTIAL BETWEEN CEMENTATION AND FINISHING OF CAST DOWEL-CORES By Purnima Joan Shahani, D.D.S., M.S.A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Dentistry at Virginia Commonwealth University.Virginia Commonwealth University, 2003Major Director: Peter C. Moon, M.S., PhDDirector of VCU Dental Biomaterials LaboratoryThis study compared the retention of cast dowel-cores cemented with Panavia® 21 subjected to immediate versus delayed high-speed finishing. Conventionally, finishing is delay

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Brühl, Frank [Verfasser], and Ulrike [Akademischer Betreuer] Kuhlmann. "Ductility in timber structures - possibilities and requirements with regard to dowel type fasteners / Frank Brühl ; Betreuer: Ulrike Kuhlmann." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2020. http://d-nb.info/1218078871/34.

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32

Pauw, Hilda. "Ontwikkelende speelterapie as psigoterapeutiese tegniek in die hantering van dowe leerders wat presenteer met emosionele probleme." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52973.

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Thesis (MEdPsych)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: Deaf learners are unique and require special support and assistance. It is apparent in the literature that deaf learners are more exposed to both physical and sexual abuse. The consequences of the latter can lead to emotional problems, for example, enuresis, anxiety disorders, depression, panic attacks, anger outbursts and attention deficits. One of the biggest challenges in the life of deaf learners must surely be communication. Misunderstandings and subsequent frustrations that ensue, normally occur as a result o

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Cinadr, Edward Michael. "True forces in dowels in rigid pavement joints." Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1177443848.

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34

Finkenbinder, David Edward. "An Experimental Investigation of Structural Composite Lumber Loaded by a Dowel in Perpendicular to Grain Orientation at Yield and Capacity." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/35055.

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The research summarized by this thesis was comprised of an experimental analysis of beams loaded perpendicular to grain at midspan by a bolted double-shear laterally-loaded connection. Connection specimens were loaded monotonically until capacity was reached. Variables of consideration included the loaded edge distance of the connection main member, the span:depth ratio of the main member, and the main member material. Southern pine machine-stress-rated (MSR) lumber, laminated veneer lumber (LVL), and parallel strand lumber (PSL) were the three material types included in the program. Exp

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Xu, Shengmin, and Peiwei Tan. "Glued timber connections : Experimental and numerical study of tension behavior under various influencing parameters." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-45371.

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Glued connections are relatively new in structural timber engineering. They are expected to show high connection stiffness as well as a high connection strength compared to mechanical connections e.g. dowel‐type connections.The main aim of this thesis is to characterize the behavior of glued timber connections under pure tension by conducting experiments as well as numerical simulations. Hereby the influence of different parameters is studied such as the geometry (bond-line length and thickness) and the material properties (e.g. adhesives of highly diverse stiffness). Additionally, reference t

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Rivers, Roger Troy. "Experimental Testing of CFRP Splays Bonded to Uniaxial Fabric." Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/321612.

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The use of fiber reinforced polymers (FRP's) for structural repair or retrofit has increased significantly in the last decade, with adoption for civil infrastructure occurring only in the last 20 years. These products are most often used to increase the capacity of damaged or deteriorated structures. Much research has been performed in the arena of testing of various FRP's bonded to both concrete and masonry substrates, the majority of which focusing on three areas; flexural strengthening, in-plane shear strengthening, and mechanical anchoring. Anchorage is commonly the limiting factor in

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Šknouřilová, Eva. "Svařování plazmou vysokopevnostních ocelí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229657.

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This thesis deals with plasma welding high strength steels. It divided into two parts, the theoretical part described the problems of method plasma welding and welding of high strength steels. In the experimental part of the many exams test the suitability of selected materials and parameters of the keyhole plasma welding. An assessment of the quality and mechanical properties of welded joints.

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Walker, Jason Matthew. "Evaluation of elliptical, glass fiber reinforced polymer, and stainless steel dowel bars in concrete pavements with consideration to subgrade resilient modulus." [Ames, Iowa : Iowa State University], 2008.

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Roux, Valerie. "'n Evaluasie van die Du-Toit-groeptoets vir dowes vir gebruik met Bruin gehoorgestremde leerlinge tussen die ouderdomme 6 en 16 jaar [Microfiche]." Thesis, Stellenbosch : Stellenbosch University, 1988. http://hdl.handle.net/10019.1/66395.

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Redmond, Laura M. "Seismic performance, analysis, and design of hybrid concrete-masonry." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53497.

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Caribbean-style hybrid concrete-masonry structures consist of a reinforced concrete frame with partially grouted and reinforced infill masonry walls. The infill walls are typically connected to the RC frame with cast-in-place dowel reinforcement along one or more edges of the wall. There is limited guidance in masonry codes to design these types of structures, and their seismic performance has not been characterized with experimental tests. In this work, an experimental program characterized the seismic behavior of hybrid concrete-masonry frames and showed they do not exhibit the typical strut

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Kouromenos, Alexandros. "Lateral Strength and Ductile Behavior of a Mortise-Tenon Connected Timber Frame." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1790.

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The primary goals of this project were to examine the amount of lateral force resisted by a single-bay mortise-tenon connected timber moment frame, and to introduce ductile behavior into the mortise-tenon connections by adding a steel sleeve around a traditional wood peg. This research aimed to provide proof that traditional timber frames are capable of ductile racking while reliably complying with ASCE 7-10 building code drift speci! cations, implying an increase in the ASCE 7-10 ductility factor (R) for wood frames when used as lateral force resisting elements. A secondary goal was to promot

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Číp, Tomáš. "Svařování vysokopevnostních ocelí laserem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229291.

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This project, elaborated within the engineering studies (code of field of study: N2301), presents experiment of welding of high-strength steel by laser. In this project, the samples of high-strength steel DOMEX 420MC will be welded by laser welding method and the welded joints will then be compared with welds made by MAG method. The theoretical part of this project summarizes the following key words in individual chapters: lasers, technology of welding of steel using laser, welding by MAG method, steel with higher strength, types of defects and check of welded joints. The practical part contai

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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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Farrouh, Ziyad. "Le Mahr (don nuptial) dans le droit islamique selon les écoles sunnites, chiites et ibāḍite". Thesis, Paris, EPHE, 2016. http://www.theses.fr/2016EPHE5017.

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Dans ce travail, une étude analytique comparative sur la notion du mahr (don nuptial) dans le droit islamique selon les différentes écoles juridiques est réalisée. Les écoles en question sont; ḥanafite, mālikite, šāfiʿite, ḥanbalite, imāmite, zaydite et ibāḍite. Tout d’abord, une présentation de la genèse de cette notion et aussi les difficultés de sa traduction est faite. A travers les enseignements de ces écoles, la notion de mahr et son importance dans le contrat de mariage sont analysées. Les points d’accords ainsi que ceux de divergences à travers une confrontation passionnante de sources

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Magxaki, Akhona. "The effect of English as a medium of instruction on the academic performance of students in life orientation at Dower Campus of the Port Elizabeth College." Thesis, Nelson Mandela Metropolitan University, 2016. http://hdl.handle.net/10948/14697.

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South Africa is a country with 11 official languages including English. English, however, dominates the educational sector, as medium of instruction. This is despite a plethora of research that shows the cognitive advantages of mother tongue instruction and language policies that promote additive bilingual approaches. As subtractive language approaches characterise poor schooling contexts, the outcomes for students are poor. This is because they do not develop proficiency in any language. The abolition of apartheid in South Africa and the advent of democracy in 1994 resulted in dramatic change

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Ubbing, John Lawrence. "Analytical Investigation of Adjacent Box Beam Ultra-High Performance ConcreteConnections." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1398954411.

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Carlsson, Martin. "Förstärkning av betongdammar med slaka bergbultar : en studie av bultars samverkan med bergsprickor." Thesis, KTH, Jord- och bergmekanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168638.

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Internationellt sett är merparten av de dammbrott som ägt rum kopplat till grundläggningen. Det är oftast kopplat till att det finns osäkerhet i de rådande grundförhållandena. Som extra säkerhet, installerades bergförankringar som en åtgärd att behandla osäkerheterna i de rådande grundförhållandena. I Sverige är merparten av kraftverksdammarna uppförda mellan 1940-och1960 talet. Det var inte ovanligt att cementingjutna slakarmerade kamstål sattes under dammarna som en extra säkerhet. När dessa bergbultar installerades var kunskapen om dess verkningssätt begränsat, då teorier om bergbultens ver

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Ozdemir, Gokhan. "Mechanical Properties Of Cfrp Anchorages." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605890/index.pdf.

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Due to inadequate lateral stiffness, many reinforced concrete buildings are highly damaged or collapsed in Turkey after the major earthquake. To improve the behavior of such buildings and to prevent them from collapse, repair and/or strengthening of some reinforced concrete elements is required. One of the strengthening techniques is the use of CFRP sheets on the existing hollow brick masonry infill. While using the CFRP sheets their attachment to both structural and non-structural members are provided by CFRP anchor dowels. In this study, by means of the prepared test setup, the pull-out stre

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David, Carlos Rodrigo Pinheiro. "Simulação numérica de painéis de concreto armado submetidos ao corte puro." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/21421.

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A análise de painéis de concreto armado submetidos a corte puro é um tópico que tem recebido atenção de pesquisadores ao longo dos anos. Isto se deve, principalmente, à dificuldade encontrada na aplicação do carregamento e das condições de vinculação sobre a estrutura. Esta dificuldade é constatada tanto experimentalmente como na análise numérica. O objetivo deste trabalho é apresentar um modelo numérico para simular o comportamento de painéis de concreto simples e de concreto armado submetidos ao corte. Na análise computacional via Elementos Finitos, será utilizado um modelo de fissura incorp

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Gomes, Orlando Ferreira. "Estudo das ligações cavilhadas impregnadas com resinas estirênicas empregadas em estruturas de madeira." Universidade de São Paulo, 1996. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-02042018-102638/.

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O trabalho tem por finalidade o estudo teórico e experimental de ligações em estruturas de madeira com cavilhas de madeira de seção cilíndrica impregnadas com resinas estirênicas. A impregnação da madeira tem como objetivos: diminuir o processo de degradação, retardação ao fogo, melhorar a estabilidade dimensional e aumentar as propriedades de resistência e elasticidade da madeira. Foram determinados experimentalmente as características de resistência e elasticidade do material e posteriormente realizados ensaios de ligações padronizados com solicitação paralela e normal às fibras. Os resultad

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