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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Development of next generation carpet backings for facile recyclability

Cascio, Anthony John. January 2006 (has links)
Thesis (M. S.)--Textile and Fiber Engineering, Georgia Institute of Technology, 2007. / Dr. Mary Lynn Realff, Committee Member ; Dr. Radhakrishnaiah Parachuru, Committee Member ; Dr. Fred L. Cook, Committee Chair ; Dr. John D. Muzzy, Committee Member.
2

Model and analysis of the geometric characteristics of primary carpet backing

Ford, Allison Elaine, January 2003 (has links) (PDF)
Thesis (M.S. in App. Math.)--School of Mathematics, Georgia Institute of Technology, 2004. Directed by Matthew Realff. / Includes bibliographical references (leaf 99).
3

Model and analysis of the geometric characteristics of primary carpet backing

Ford, Allison Elaine 01 December 2003 (has links)
No description available.
4

The development of mechanical properties of latex backing on tufted carpet during curing

Teng, Shen-Hao Ike 12 1900 (has links)
No description available.
5

The determination of the drying characteristics of foam-backed carpet tiles

Solis, Carlos F. 08 1900 (has links)
No description available.
6

Experimental and analytical study of the drying characteristics of carpet tiles

Francis, Nicholas Donald 08 1900 (has links)
No description available.
7

Image analysis of carpet tufting

Basnandan, Anneil 05 1900 (has links)
No description available.
8

Réalisation et caractérisation de composites particulaires métalliques utilisés comme dos de sondes ultrasonores hautes températures / Realisation and characterisation of metallic particulate composites used as backs of ultrasonics transducers high temperature

Boubenia, Redha 24 November 2017 (has links)
Dans le domaine du contrôle non-destructif par ultrasons l’utilisation de sondes ultrasonores pouvant fonctionner en continue à des températures à minima de 300°C serait d’un grand intérêt. Par exemple, cela pourrait concerner le contrôle de santé de structures de l’industrie nucléaire ou pétrolière. Plus fondamentalement, de telles sondes pourraient être également utilisées pour caractériser le comportement mécanique d’une large gamme de matériaux soumis à des stress thermiques et réaliser par exemple le suivi de l’endommagement et de vieillissement de ces matériaux. Or, commercialement il n’existe pas de sondes ultrasonores pouvant fonctionner à de telles températures, cela reste du domaine de la recherche.Une sonde ultrasonore est constituée de 3 éléments principaux : le dos, l’élément actif et la face avant. Des éléments actifs pouvant fonctionner à des températures très élevées existent, citons à titre d’exemple le LiNb03 (température de curie de 1350°C). Toutefois dans l’objectif d’obtenir des sondes ultrasonores performantes à hautes températures il est nécessaire d’optimiser les propriétés et également le couplage acoustique de chacun des trois constituants de la sonde. Le dos est un élément important qui, par atténuation de l’onde émise en face arrière de l’élément actif, permet de contrôler la bande passante et la sensibilité des sondes.Le présent travail de thèse concerne la réalisation et la caractérisation de composites particulaires métalliques utilisés comme dos de sondes ultrasonores destinées à fonctionner à hautes températures. Les composites sont réalisés par pressage uni-axial d’une poudre servant de matrice et d’une deuxième de diffuseur. Durant ce travail exploratoire nous avons mis au point un protocole de fabrication qui nous a permis de réaliser des composites d’étain/sn ayant des propriétés acoustiques intéressantes (atténuation et impédance). Pour caractériser nos échantillons un banc de spectroscopie ultrasonore a été spécifiquement mis en œuvre / In the field of ultrasonic non-destructive testing, the use of ultrasonic transducer which can operate continuously at temperatures of at least 300 ° C. would be of great interest. For example, this could concern the health control of structures in the nuclear or petroleum industry. More fundamentally, such probes could also be used to characterize the mechanical behavior of a wide range of materials subjected to thermal stresses and, for example, to monitor the damage and aging of these materials. However, commercially, there are no ultrasonic probes that can operate at such temperatures, but this is still a research area.An ultrasonic probe consists of 3 main elements: the back, the active element and the front face. Active elements which can operate at very high temperatures exist, for example LiNbO 3 (curie temperature of 1350 ° C.). However, in order to obtain high-performance ultrasonic probes at high temperatures, it is necessary to optimize the properties and also the acoustic coupling of each of the three components of the probe. The back is an important element which, by attenuation of the wave emitted on the back of the active elements, allows to control the bandwidth and the sensitivity of the probes.The present thesis deals with the realization and characterization of metallic particulate composites used as backs of ultrasonic probes intended to operate at high temperatures. The composites are produced by uni-axial pressing of a matrix powder and a second diffuser. During this exploratory work, we developed a manufacturing protocol that allowed us to produce tin / sn composites with interesting acoustic properties (attenuation and impedance). To characterize our samples a bench of ultrasonic spectroscopy has been specifically implemented
9

Performance analysis of Air GapMembrane Distillation:Comparison of PTFE membranes : Comparison of PTFE membranes

Baaklini, Daniel January 2011 (has links)
Membrane Distillation (MD) is a very promising new technology which can be coupled with renewableenergies and/or waste heat to produce pure water at a low-cost. MD is extremely dependent upon theperformance of the membrane, as it dictates the mass transfer, the heat transfer and the long-termapplication. Unfortunately, there are no commercially produced MD-specific membranes at this point intime. This project aims at finding correlations between membrane characteristics and their performancesin order to define the optimal morphologies and operating conditions for a MD-specific membrane. Todo so, the characteristics of 3 PTFE membranes initially designed for MF were determined throughporosity measurements and microscopic imaging, while their performances were evaluated by measuringthe air permeability and by testing them on an AGMD bench-scale unit.It was found that the most desirable characteristics for a membrane with a high flux are a film with largeporosity, low tortuosity, a small thickness with a resistance to compaction and that has not been subjectedto thickness altering processes. Moreover, the surface pore sizes need to be small enough to avoid surfacewetting, and the backing layer should not restrict the vapor flow in a significant way and should possesslarge open areas.As the feed water temperature and/or the flow rate rises, the flux increases and the energy requirementdecreases, this means that one should ideally aim for the highest possible operating conditions whichrequires larger costs. Therefore it is necessary to find a cost effective solution for each application.The results show that, for comparative purposes, Gurley values are good indicators of a membrane’soverall performance in MD, despite the fact that it does not always accurately predict it. It has also beenfound that membrane specifications provided by manufacturers are generally only approximations, andshould therefore not be used as very precise data for comparing membranes.
10

Waveform controlled gas metal arc welding of corrosion resistant alloys without back purging

McNicol, Jeremy M. 21 July 2022 (has links)
No description available.

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