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Relevant bibliographies by topics / Rayon des fibres

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Academic literature on the topic 'Rayon des fibres'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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Journal articles on the topic "Rayon des fibres"

1

Aitken, R. "The Manufacture of Viscose Rayon Fibres." Journal of the Society of Dyers and Colourists 99, no. 5-6 (October 22, 2008): 150–53. http://dx.doi.org/10.1111/j.1478-4408.1983.tb03681.x.

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Okamoto, A. "Specialized Rayon Fibres and a Case of Modification." Sen'i Kikai Gakkaishi (Journal of the Textile Machinery Society of Japan) 47, no. 4 (1994): P147—P151. http://dx.doi.org/10.4188/transjtmsj.47.4_p147.

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Elmest, David, and Ken de Vanet. "The effect of carbonization conditions on the properties of rayon-based carbon fibres." High Performance Polymers 5, no. 2 (April 1993): 161–73. http://dx.doi.org/10.1088/0954-0083/5/2/008.

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The effect of carbonization temperature on the properties of prewoven carbon fibre made from a rayon precursor is examined. Bulk composition is contrasted with surface elemental analysis (XPS) which shows that low carbonization temperatures (2300F, 1260C) produce a fibre with up to 15 and 5 at.% of oxygen and sodium respectively on the surface. At higher firing temperatures (up to 3000, 1649 C), the surface O and Na levels are significantly reduced and the measured fibre surface area declines from 50 m2 g-1 to under 5 ml g-'. Atomic force microscopy (AFM) was used to examine the surface detail of fibres at magnifications over 250000 times. AFM micrographs reveal that the fibre surface after carbonization at low temperatures is covered with a crust believed to be the char residue from tars released during the precarbonization stage. Surface analysis by Auger spectroscopy has confirmed the high oxygen and sodium content of the char material. Use of higher carbonization temperatures results in fibre surface properties which are generally regarded as preferable for use in ablative applications.

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Bohra, J. N., and R. K. Saxena. "Microporosity in rayon-based carbonized and activated carbon fibres." Colloids and Surfaces 58, no. 4 (October 1991): 375–83. http://dx.doi.org/10.1016/0166-6622(91)80216-b.

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Bairagi, N., M. L. Gulrajani, B. L. Deopura, and A. Shrivastava. "Dyeing of N-modified viscose rayon fibres with reactive dyes." Coloration Technology 121, no. 3 (May 2005): 113–20. http://dx.doi.org/10.1111/j.1478-4408.2005.tb00260.x.

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Harry, I. D., B. Saha, and I. W. Cumming. "Surface properties of electrochemically oxidised viscose rayon based carbon fibres." Carbon 45, no. 4 (April 2007): 766–74. http://dx.doi.org/10.1016/j.carbon.2006.11.018.

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CHEETHAM, R. C., P. R. BRIDGES, and D. C. PRATT. "Developments in the Colouring of Rayon and Acrylic Fibres for Carpets." Journal of the Society of Dyers and Colourists 81, no. 12 (October 22, 2008): 562–68. http://dx.doi.org/10.1111/j.1478-4408.1965.tb02631.x.

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Pan, Yuan Feng, and Hui Ning Xiao. "Rendering Rayon Fibres Antimicrobial and Thermal-Responsive via Layer-by-Layer Self-Assembly of Functional Polymers." Advanced Materials Research 236-238 (May 2011): 1103–6. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.1103.

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A thermal-responsive polymer was prepared by partially acetalyzing poly(vinyl alcohol) (PVA). The completely reversible polymer aggregation and dissolution occur above and below a low critical solution temperature (LCST) for the aqueous solution of the modified PVA. The partially acetalized PVA (APVA) with higher molecular weight and higher degree of acetalysis exhibited a lower LCST transition and was used as an anionic polymer for polymer complexation. Water-soluble polymer, cationic polyhexamethylene guanidine hydrochloride (CPHGH) with antimicrobial property, was also prepared. In conjunction with APVA, CPHGH created the unique antimicrobial polymer multilayers on the surfaces of rayon fibres via layer by layer (LbL) assembly. AFM images revealed that the particles generated by multilayers became larger after the material was treated at 60°C; while the roughness of the surfaces was increased as the layer number increased and then decreased. Moreover, antimicrobial tests also demonstrated that the rayon fiber assembled with (CPHGH/APVA) multilayers exhibited higher antimicrobial activity against E. coli and s. aureus.

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Huang, Zheng-Hong, Feiyu Kang, Yong-Ping Zheng, Jun-Bing Yang, and Kai-Ming Liang. "Adsorption Characteristics of Trace Volatile Organic Compounds on Activated Carbon Fibres at Room Temperature." Adsorption Science & Technology 20, no. 5 (June 2002): 495–500. http://dx.doi.org/10.1260/026361702320644770.

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The adsorption characteristics of volatile organic compounds (VOCs) on viscose rayon-based activated carbon fibres (ACFs) were investigated. ACFs with specific surface areas of 640 m2/g and 1460 m2/g were used to adsorb trace volatile organic compounds in nitrogen streams at atmospheric pressure at or near room temperature (25°C and 30°C). The experimental results showed that ACFs with different surface areas exhibited different dynamic adsorption behaviours at or near room temperature.

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Franciszczak, P., R. Merijs-Meri, K. Kalniņš, A. K. Błędzki, and J. Zicans. "Short-fibre hybrid polypropylene composites reinforced with PET and Rayon fibres – Effects of SSP and interphase tailoring." Composite Structures 181 (December 2017): 121–37. http://dx.doi.org/10.1016/j.compstruct.2017.08.075.

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Dissertations / Theses on the topic "Rayon des fibres"

1

Freeman, John James. "Studies in the development and modification of pore structure in activated viscose rayon chars." Thesis, Brunel University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235895.

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Shodjaie, Afsané. "Contribution à l'étude de la propagation de la lumière dans les fibres optiques application, étude de l'influence du rayon de courbure sur le mode de propagation d'une fibre optique monomode /." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb376011884.

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SHODJAIE, GHAZAIE AFSANE. "Contribution a l'etude de la propagation de la lumiere dans les fibres optiques : application, etude de l'influence du rayon de courbure sur le mode de propagation d'une fibre optique monomode." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13186.

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Definition des parametres permettant de satisfaire dans une fibre optique un regime de propagation monomode. Extension rediale du mode en fonction de ces parametres et modelisation de l'attenuation des modes secondaires permettant d'etablir les fenetres de transmission du mode fondamental

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Dassi, Carhel. "La fibrinographie : une méthode multi-longueurs d’ondes pour la détermination de la structure du caillot en plasma." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAS028.

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Le rôle physiologique du caillot est d’éviter un épanchement excessif de sang en présence d’une brèche vasculaire. Une fois cette fonction remplie, il doit pouvoir être facilement détruit, afin qu’il ne passe pas dans le système veineux et ne gêne la circulation sanguine. La formation d’un caillot de fibrine et sa lyse, processus clés de l’hémostase, impliquent à la fois la polymérisation des monomères de fibrinogène en un réseau de fibres de fibrine, et la résorption du réseau de fibres de fibrine constitué. Bien que ce réseau contrôle l’ensemble des propriétés physiques et mécaniques du caillot, sa structure aux échelles inférieures au micron est très mal caractérisée. Le principal verrou à la caractérisation physique du caillot en environnement clinique est l’absence de méthode de mesure quantitative, fiable, sensible et reproductible. Il est donc nécessaire de produire une méthode de mesure adéquate, couplée à un système de mesure sensible. Nous avons démontré dans ce travail, grâce à notre méthode utilisant plusieurs longueurs d’onde, que l’analyse du spectre de lumière visible transmis à travers un caillot permet de déterminer simultanément, quantitativement et en conditions quasi-physiologiques, plusieurs paramètres essentiels de structure du caillot de fibrine, à savoir le nombre de protofibrilles par fibre de fibrine, le rayon et la densité de ces fibres, ainsi que les temps de formation et de lyse du caillot. Cette technique a été validée via les résultats avec des CV inférieurs dans l’ensemble à 6% sous plusieurs conditions de tests et différents profils plasmatiques : normaux, hypo/hyper coagulants et hypo/hyper fibrinolytiques, attestant de la robustesse et de la fiabilité de la technique de mesure aussi bien pour le suivi de la coagulation que de la lyse. Cette méthode de spectrophotométrie a pu être implantée sur un automate modifié à des fins de diagnostic et à vocation hospitalière pour des plasmas de patients présentant des troubles de l’hémostase. Les informations cliniques et intérêts attendus de ce nouveau test, concernent à la fois la qualité du réseau de fibrine, sa lyse accélérée ou sa résistance à la fibrinolyse ainsi que la résultante de la balance coagulo-lytique
The physiological role of the clot is to avoid excessive bleeding in the presence of a vascular breach. Once this function is filled, the clot must be able to be easily destroyed, so that it is not transported in the venous system and does not hamper blood circulation. The formation of a fibrin clot and its lysis are key processes of hemostasis, implying simultaneously the polymerization of the fibrinogen monomers in a fibrin fibers network, and the destruction of this constituted network.Although this network controls the physical and mechanical properties of the clot, its structure at scales smaller than the micron is poorly characterized. The main problem in the physical characterization of clot in clinical settings is the current absence of a quantitative, sensitive and reproducible measurement method.We demonstrated in this work, thanks to our method using several wavelengths, that the analysis of the visible spectra of light transmitted through a clot allows to determine simultaneously, quantitatively and in quasi-physiological conditions, several essential parameters of structure of the fibrin clot, namely the number of protofibrils per fibrin fibers, the radius and the density of fibers, and various times of clotting and lysis of the clot. This method was validated by the results with CV inferior to 6 % under all test conditions and various plasmatic profiles: normal, hypo / hyper coagulant and hypo / hyper fibrinolytic. This demonstrates the robustness and reliability of the measurement method when measuring both clotting and clot lysis.This spectrophotometric method was implemented on a modified automaton dedicated to diagnosis of patients presenting hemostatic disorders. The clinical information and the interests expected from this new test concern at the same time the quality of the fibrin network, its accelerated lysis or its resistance to fibrinolysis, and the resultant of the coagulo-lytic balance

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Modh, Haresh A. "Chemical treatment and adhesion in internally reinforced rayon fibers." Ohio : Ohio University, 1988. http://www.ohiolink.edu/etd/view.cgi?ohiou1182867766.

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Valle, Orero Jessica. "Dynamics and thermal behaviour of films of oriented DNA fibres investigated using neutron scattering and calorimetry techniques." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2012. http://tel.archives-ouvertes.fr/tel-00734670.

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The majority of structural studies on DNA have been carried out using fibre diffraction, while studies of its dynamics and thermal behaviour have been mainly performed in solution. When the DNA double helix is heated, it exhibits local separation of the two strands that grow in size with temperature and lead to their complete separation. This work has investigated various aspects of this phenomenon. The experiments reported in this thesis were carried out on films of oriented fibres of DNA prepared with the Wet Spinning Apparatus. Thus, sample preparation and characterisation are essential parts of the research. The structures of two forms of DNA, A and B, have been explored as a function of relative humidity at fixed ionic conditions. A method to eliminate traces of ever-present B-form contamination in A-form samples was established. The high orientation of the DNA molecules within the samples allowed us to investigate dynamical fluctuations and the melting transition of DNA using neutron scattering, which can provide the spatial information crucial to understand a phase transition, probing the static correlation length along the molecule as a function of temperature. The transition has been investigated for A and B-forms in order to understand its dependence on molecular configuration.Furthermore, after the first melting, denatured DNA films show typical glass behaviour. Their thermal relaxation has been explored using calorimetry.Neutron and X-ray inelastic scattering (INS and IXS) were used in the past to measure longitudinal phonons in fibre DNA, and the results shown disagreement. Recent INS measurements supported with phonon simulations have been crucial to understand the different dispersion curves reported to date. Experiments using INS and IXS have been carried out to continue with this investigation. Attempts to observe the transverse fluctuations associated to the thermal denaturing of DNA, never experimentally investigated before, have been made.

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Girard, Sylvain. "Analyse de la réponse des fibres optiques soumises à divers environnements radiatifs." Saint-Etienne, 2003. http://www.theses.fr/2003STET4004.

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Ce mémoire présente une analyse de la réponse des fibres optiques soumises à divers environnements radiatifs (X pulsé, g continu, UV). Le premier chapitre détaille les applications envisagées pour les fibres dans les différents domaines du nucléaire ainsi que le phénomène de pertes induites par irradiation. Le second présente les moyens expérimentaux mis en œuvre pour caractériser leurs réponses sous irradiation et les défauts à l'origine des pertes. Dans le chapitre suivant, les réponses des fibres optiques à 1. 31 et 1. 55 æm à des irradiations X et g sont classées en fonction des dopants en cœur, en gaine ainsi que de certains paramètres de fabrication. Le quatrième chapitre est consacré à une étude des mécanismes physico-chimiques régissant la tenue des fibres. Une dernière partie de la thèse est consacrée à la comparaison entre les effets induits par les irradiations g et UV. A partir de l'ensemble de ces travaux, nous proposons des pistes en vue du durcissement des fibres optiques
This thesis presents a study of the radiation responses of optical fibers under different radiative environments (pulsed X rays, steady state g rays, cw UV). The first chapter describes the possible applications for the fibers in different nuclear fields and the radiation-induced losses phenomenon. In the second one, we describe our experimental set-up used to characterize the fiber radiation responses and the radiation-induced defects. In the third chapter, the radiation responses at 1. 31 and 1. 55 æm of the fibers are classified with respect to their core and cladding dopants and process parameters. The following chapter gives an analysis of the different mechanisms related to the origin of the radiation-induced losses. The last part of the thesis presents the comparison between the effects of g-rays and UV exposure on the optical fibers. From our whole study, we propose some rules for the design of radiation-hardened fibers

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Naouar, Naïm. "Analyse mésoscopique par éléments finis de la déformation de renforts fibreux 2D et 3D à partir de microtomographies X." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0088/document.

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La simulation à l'échelle mésoscopique de la déformation des renforts composites fournit des informations importantes. En particulier, elle donne la direction et la densité de fibres qui conditionne la perméabilité du renfort textile et les propriétés mécaniques du composite final. Ces analyses mésoscopiques par éléments finis dépendent fortement de la qualité de la géométrie initiale du modèle. Certains logiciels ont été développés pour décrire ces géométries de renforts composites. Mais, les géométries obtenues impliquent une simplification (notamment dans la section transversale de mèche) qui peut perturber le calcul de déformation du renfort. Le présent travail présente une méthode directe utilisant la microtomographie à rayon X pour générer des modèles éléments finis, basée sur la géométrie réelle de l'armure textile. Le modèle EF peut être obtenu pour tout type de renfort, plus ou moins complexe. Les problèmes d’interpénétrations de mèches sont évités. Ces modèles sont utilisés avec deux lois de comportement : une loi hypoélastique et une loi hyperélastique. Les propriétés de chacune d'entre elles, ainsi que les grandeurs caractéristiques nécessaires à leur implémentation dans le logiciel ABAQUS sont développées. Enfin, une identification des paramètres matériau à l'aide d'une méthode inverse est proposée. Les résultats obtenus pour les simulations de mise en forme sont comparés avec les résultats expérimentaux et montrent une bonne correspondance entre les deux
The simulation at meso-scale of textile composite reinforcement deformation provides important information. In particular, it gives the direction and density of the fibres that condition the permeability of the textile reinforcement and the mechanical properties of the final composite. These meso FE analyses are highly dependent on the quality of the initial geometry of the model. Some software have been developed to describe composite reinforcement geometries. The obtained geometries imply simplification that can disrupt the reinforcement deformation computation. The present work presents a direct method using computed microtomography to determine finite element models based on the real geometry of the textile reinforcement. The FE model is obtained for any specificity or variability of the textile reinforcement, more or less complex. The yarns interpenetration problems are avoided. These models are used with two constitutive laws : a hypoelastic law and a hyperelastic one. An analysis of their properties is presented and their implementation in the software ABAQUS is detailed. Finally, an identification method is presented and the results of forming simulations are compared to experimental tests, which shows a good fit between the both

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Delfosse, Caroline. "Propriétés physico-chimiques et biologiques de fibres carbonées expérimentales." Lille 2, 2000. http://www.theses.fr/2000LIL2D001.

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Martinez, Valérie. "Influence des effets thermiques et mécaniques sur la relaxation des préformes et des fibres optiques à base de silice : étude par diffusion de la lumière et par diffusion des rayons X." Lyon 1, 2004. http://www.theses.fr/2004LYO10181.

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Cette thèse est consacrée à l'étude de l'influence des effets thermiques et mécaniques sur les modifications structurales des verres de silice et de silice dopée. La première partie de ce travail concerne l'étude des paramètres structuraux qui régissent l'atténuation dans les fibres optiques de télécommunication. Les mesures de diffusion Raman, Rayleigh, Brillouin et des rayons X aux petits angles ont montré que des traitements thermiques appropriés qui abaissent la température fictive des fibres, peuvent diminuer les fluctuations de densité et ainsi améliorer la transmission. La seconde partie de ce travail concerne l'impact de l'indentation sur la structure d'un verre de silice pure et de deux échantillons dopés GeO2. Une cartographie Raman de l'indent a été effectuée et l'évolution des signatures spectroscopiques (bande principale, D1 et D2) a mis en évidence différentes modifications structurales caractéristiques d'une densification

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Books on the topic "Rayon des fibres"

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The rayon spinners: The strategic management of industrial relations. Delhi: Oxford University Press, 1994.

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Mass.) AMS Special Session on Radon Transforms and Geometric Analysis (2012 Boston. Geometric analysis and integral geometry: AMS special session in honor of Sigurdur Helgason's 85th birthday, radon transforms and geometric analysis, January 4-7, 2012, Boston, MA ; Tufts University Workshop on Geometric Analysis on Euclidean and Homogeneous Spaces, January 8-9, 2012, Medford, MA. Edited by Quinto, Eric Todd, 1951- editor of compilation, Gonzalez, Fulton, 1956- editor of compilation, Christensen, Jens Gerlach, 1975- editor of compilation, and Tufts University. Workshop on Geometric Analysis on Euclidean and Homogeneous Spaces. Providence, Rhode Island: American Mathematical Society, 2013.

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Segal, David. Candy Floss, Cellulose, Sugars and Foods. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198804079.003.0002.

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Chapter 2 describes conversion of cellulose to useful products in the 19th century (rayon, celluloid, guncotton) and the role of glucose in its chemical structure. The preparation of candy floss (cotton candy) is described and how the method is relevant to spinning synthetic fibres. The composition of sugar and the composition of foods is explained. In particular, the distinction among starch, sugar, carbohydrates, monosaccharides, and polysaccharides is made. Conversion of crops to bioethanol is described.

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International Agency for Research on Cancer. and IARC Working Group on the Evaluation of Carcinogenic Risks to Humans (1987 ; : Lyon, France), eds. Man-made mineral fibres and radon. [Lyon]: International Agency for Research on Cancer : Distributed by the Secretariat of the World Health Organization, 1988.

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Samet, Jonathan M., and Aaron J. Cohen. Air Pollution. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190238667.003.0017.

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A wide variety of manmade and naturally occurring air pollutants are known to cause cancer. Diverse exposures such as tobacco smoke, radionuclides (radon), chemicals (benzene, mustard gas, and volatile organic compounds), fibers (asbestos), and metals and metalloids (chromium, nickel, and arsenic) have long been classified as carcinogenic to humans. Historically, these classifications were based predominantly on high levels of exposure in occupational settings. Over the last thirty to forty years, scientific attention has focused on quantifying the adverse health effects of indoor and outdoor air pollutants at exposure levels several orders of magnitude lower than were studied initially. These include secondhand smoke, household exposure to radon, residential and environmental exposure to asbestos, soot from diesel-powered engines, ambient exposures to small particles (PM2.5), and indoor air pollution from the combustion of biomass and coal. This chapter provides an overview of recent epidemiologic studies of air pollutants and cancer.

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The 2006-2011 World Outlook for Rayon, Acetate, and Lyocell Manufactured Fibers. Icon Group International, Inc., 2005.

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Ramaswamy, E. A. The Rayon Spinners: The Strategic Management of Industrial Relations. Oxford University Press, USA, 1995.

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Parker, Philip M. The 2007-2012 World Outlook for Rayon, Acetate, and Lyocell Fibers and Filaments Manufacturing. ICON Group International, Inc., 2006.

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(Producer), World Health Organization, ed. Man-Made Mineral Fibres and Radon. Vol 43 (IARC Monographs on the Evaluation of Carcinogenic Risks to H). World Health Organisation, 1988.

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Russell, Karen Therese. Raman spectroscopic studies of asbestos: The design and commissioning of a ramon microprobe and a study of theraman spectra of asbestos in the respirable fibre size range. Bradford, 1985.

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Book chapters on the topic "Rayon des fibres"

1

Sengupta, A. K. "Rayon fibres." In Manufactured Fibre Technology, 480–513. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5854-1_17.

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Gooch, Jan W. "Rayon Fiber." In Encyclopedic Dictionary of Polymers, 610–11. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9787.

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Thrower, Peter A. "Cellulose (Rayon)-Based Fibers." In Inorganic Reactions and Methods, 165–66. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145333.ch115.

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Singer, Sandra M., David M. Northrop, Mary W. Tungol, and Walter F. Rowe. "The Infrared Spectra of Buried Acetate and Rayon Fibers." In Biodeterioration Research, 577–87. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4757-9453-3_46.

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Monchaux, G., J. P. Morlier, M. Morin, R. Zalma, H. Ogata, H. Pézerat, and R. Masse. "Carcinogenic Effects in Rats of Exposure to Different Minerals from Metallic Mine Ores, Radon and Radon Daughters." In Cellular and Molecular Effects of Mineral and Synthetic Dusts and Fibres, 159–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-79041-6_13.

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Hei, Tom K. "Oncogenic Transformation by Asbestos Fibers and Radon-Simulated Alpha Particles." In Effects of Mineral Dusts on Cells, 389–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74203-3_49.

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Parajuli, Prakash, Sanjit Acharya, Shaida Sultana Rumi, Md Tanjim Hossain, and Noureddine Abidi. "Regenerated cellulose in textiles: rayon, lyocell, modal and other fibres." In Fundamentals of Natural Fibres and Textiles, 87–110. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-821483-1.00015-2.

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"Carbon Fibers from Rayon Precursors." In Carbon Fibers, edited by Leighton H. Peebles, 3–6. CRC Press, 2018. http://dx.doi.org/10.1201/9781351070423-2.

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"Rayon fiber." In Encyclopedic Dictionary of Polymers, 819–20. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_9607.

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COOK, J. GORDON. "CELLULOSE FIBRES; RAYONS." In Handbook of Textile Fibres, 9–78. Elsevier, 2001. http://dx.doi.org/10.1533/9781855734852.9.

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Conference papers on the topic "Rayon des fibres"

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Doehring, Todd C. "Marker-Less Measurement and Analysis of Collagen Uncrimping, Orientation, and Local Deformation Patterns Under Controlled Loads." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61018.

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Deformation, crimp, and alignment patterns of collagen fibers in soft tissues have been measured using a novel testing system combining controlled loading with synchronized high-resolution imaging. Marker-less feature tracking was used to measure 2-D local deformations, and a radon transform was used to compute quantitative maps of crimp patterns and local tissue fiber orientation. We found highly nonuniform deformation and crimp patterns, with the highest strains near the clamps, and the lowest strains in the midsubstance region.

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Jeong, Namin, David W. Rosen, and Yan Wang. "A Comparison of Surfacelet-Based Methods for Recognizing Linear Geometric Features in Material Microstructure." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-13370.

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Integration of material information and mechanical properties with geometry enables many product development activities, including design, analysis, and manufacturing. To integrate material information into CAD systems, geometric features of material microstructure must be recognized and represented, which is the focus of this paper. Linear microstructure features, such as fibers or grain boundaries, can be found computationally from microstructure images using surfacelet based methods, which include the Radon or Radon-like transform followed by a wavelet transform. By finding peaks in the transform results, linear features can be recognized and characterized by length, orientation, and position. The challenge is that often a feature will be imprecisely represented in the transformed parameter space. In this paper, we investigate several variations of the surfacelet based feature recognition methods, including masks, clustering methods, and whether to recognize features in the Radon or wavelet transform. These variations will be investigated to identify their strengths and limitations on a metal alloy and reinforced polymer microstructures.

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Wu, Qilin, and Ding Pan. "STM Studies on the Surface Structure of a New Carbon Fiber From Lyocell." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39473.

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Rayon-based carbon fiber (RCF) and lyocell-based carbon fiber (LCF) were investigated through surface analysis by SEM and STM. SEM delineated much smoother surface of LCF, while RCF exhibited rough surface with obvious cracks and grooves, which undoubtedly lead to the tensile strength decrease of RCF. At 500nm×500nm area using STM, it was found that the surfaces of LCF are characterized by bulk structure with the area of about 150nm2. The bulk structure was constituted of smaller slug-like microstructures, each of which has a width of about 25 nm and length of 150 nm aligned at an angle of 45° to the fiber axis. The distance between two adjacent carbon atoms of LCF estimated by section analysis of STM revealed that hexagonal carbon rings did not form on the surface of LCF.

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Tommasino, L., and G. Espinosa. "From the similarities between neutrons and radon to advanced radon-detection and improved cold fusion neutron-measurements." In 1ST WORKSHOP ON SPECIALITY OPTICAL FIBERS AND THEIR APPLICATIONS. American Institute of Physics, 2014. http://dx.doi.org/10.1063/1.4890697.

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Pressyanov, D., D. Dimitrov, I. Dimitrova, S. Georgiev, and K. Mitev. "Novel approaches in radon and thoron dosimetry." In 1ST WORKSHOP ON SPECIALITY OPTICAL FIBERS AND THEIR APPLICATIONS. American Institute of Physics, 2014. http://dx.doi.org/10.1063/1.4890699.

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Su, Xuefeng, and Theodore J. Heindel. "Effect of Gas Distributor on Gas Holdup in Fiber Suspensions." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56222.

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Two different aeration plates are used to study their effect on gas holdup and flow regime transition in fiber suspensions. Two gas distributors with different open areas (A = 0.57% and 2.14%) and the same orifice diameter (do = 1 mm) are used, and experiments are performed using three different Rayon fiber lengths (L = 3, 6, and 12 mm) over a range of superficial gas velocities (Ug ≤ 18 cm/s) and a range of fiber mass fractions (0 ≤ C ≤ 1.8%) in a 15.24 cm diameter semi-batch bubble column. Experimental results show that the distributor with A = 2.14% tends to produce lower gas holdup than the one with A = 0.57% for both air-water systems and fiber slurries. However, the effect of distributor open area on gas holdup diminishes at high fiber mass fractions (C ≤ 1.2%). Both distributors generate homogeneous, transitional, and heterogeneous flow regimes over the range of superficial gas velocities for air-water and low fiber mass fraction suspensions. However, the distributor with A = 2.14% enhances the flow regime transition, i.e., the superficial gas velocity at which the transitional flow regime appears is lower. Additionally, the fiber mass fraction at which purely heterogeneous flow is observed is lower when A = 2.14%.

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Molins Borrell, Climent, Sandokan Lorente Monleon, and Sergi Ocete Manero. "Determinación analítica y experimental de la resistencia a tracción de probetas de hormigón reforzadas con fibras de acero." In HAC2018 - V Congreso Iberoamericano de Hormigón Autocompactable y Hormigones Especiales. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/hac2018.2018.5616.

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Las propiedades mecánicas del hormigón reforzado con fibras acero (HRFA) están íntimamente ligadas a la cuantía, tipología y orientación de las fibras. Determinar de manera fiable la resistencia a tracción del HRFA es un tema aún no resuelto y que está siendo investigado a nivel internacional. La tomografía mediante rayos X se ha erigido como una de las herramientas más eficaces para determinar la posición y orientación de las fibras. Por otra parte, en los últimos años se han propuesto y desarrollado diferentes modelos para simular el comportamiento resistente y determinar la capacidad a tracción del HRFA. Uno de estos métodos se basa en la superposición del compartimiento individual de las fibras en la sección de fisura en función de la orientación. De los resultados obtenidos en una primera campaña experimental en que se tomografiaron los testigos que posteriormente fueron ensayados a tracción uniaxial, se ha derivado analíticamente su resistencia a tracción uniaxial. La comparación de los datos analíticos con los obtenidos en los ensayos permite contrastar la idoneidad de la formulación planteada. Así mismo, el estudio de los resultados permite analizar la influencia de la cuantía y la orientación de las fibras en la resistencia del material.DOI: http://dx.doi.org/10.4995/HAC2018.2018.5616

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Schaub, Nicholas J., Ryan J. Gilbert, and Sean J. Kirkpatrick. "Electrospun fiber alignment using the radon transform." In SPIE BiOS, edited by E. Duco Jansen and Robert J. Thomas. SPIE, 2011. http://dx.doi.org/10.1117/12.875019.

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Ángeles, A., and G. Espinosa. "Study of epidemiological risk of lung cancer in Mexico due indoor radon exposure." In 1ST WORKSHOP ON SPECIALITY OPTICAL FIBERS AND THEIR APPLICATIONS. American Institute of Physics, 2014. http://dx.doi.org/10.1063/1.4890708.

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Monteiro, C. S., L. Coelho, S. M. Barbosa, and D. Guimarães. "Development of a New System for Real-Time Detection of Radon Using Scintillating Optical Fibers." In Optical Fiber Sensors. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/ofs.2018.wd5.

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