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Academic literature on the topic 'Diffusion techniques'

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Published: 11 March 2023

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Journal articles on the topic "Diffusion techniques"

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Bénière, François. "Tracer diffusion techniques." J. Chem. Soc., Faraday Trans. 86, no. 8 (1990): 1151–56. http://dx.doi.org/10.1039/ft9908601151.

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Patel, Mahesh R., Bettina Siewert, Steven Warach, and Robert R. Edelman. "DIFFUSION AND PERFUSION IMAGING TECHNIQUES." Magnetic Resonance Imaging Clinics of North America 3, no. 3 (August 1995): 425–38. http://dx.doi.org/10.1016/s1064-9689(21)00254-3.

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Mazzia, Annamaria, Giorgio Pini, and Flavio Sartoretto. "Meshless techniques for anisotropic diffusion." Applied Mathematics and Computation 236 (June 2014): 54–66. http://dx.doi.org/10.1016/j.amc.2014.03.032.

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Platt, Daniel E., and Fereydoon Family. "Validity of diffusion-enhancement techniques applied to diffusion-limited aggregation and other diffusive growth processes." Physical Review A 38, no. 9 (November 1, 1988): 4910–11. http://dx.doi.org/10.1103/physreva.38.4910.

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Dung, Nguyen Tien, and Trinh Nhu Quynh. "Tail distribution of the integrated Jacobi diffusion process." Statistics, Optimization & Information Computing 8, no. 3 (July 1, 2020): 790–800. http://dx.doi.org/10.19139/soic-2310-5070-760.

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In this paper, we study the distribution of the integrated Jacobi diffusion processes with Brownian noise and fractional Brownian noise. Based on techniques of Malliavin calculus, we develop a unified method to obtain explicit estimates for the tail distribution of these integrated diffusions.
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Avasthi, D. K., and A. Tripathi. "Ion Beam Techniques for Study of Diffusion." Materials Science Forum 223-224 (July 1996): 433–36. http://dx.doi.org/10.4028/www.scientific.net/msf.223-224.433.

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Cohen, Jack S. "Biomedical Applications of Diffusion-Weighted NMR Techniques." Israel Journal of Chemistry 43, no. 1-2 (November 2003): 81–90. http://dx.doi.org/10.1560/f773-r2cr-xehh-4931.

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Fernandez-Cornejo, Jorge, and Alan Kackmeister. "The Diffusion of Integrated Pest Management Techniques." Journal of Sustainable Agriculture 7, no. 4 (July 23, 1996): 71–102. http://dx.doi.org/10.1300/j064v07n04_08.

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Llatser, Ignacio, Albert Cabellos-Aparicio, Massimiliano Pierobon, and Eduard Alarcon. "Detection Techniques for Diffusion-based Molecular Communication." IEEE Journal on Selected Areas in Communications 31, no. 12 (December 2013): 726–34. http://dx.doi.org/10.1109/jsac.2013.sup2.1213005.

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HUANG, CHONGFU. "INFORMATION DIFFUSION TECHNIQUES AND SMALL-SAMPLE PROBLEM." International Journal of Information Technology & Decision Making 01, no. 02 (June 2002): 229–49. http://dx.doi.org/10.1142/s0219622002000142.

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Strong interests in the small-sample problem have been given towards for establishing several information diffusion techniques for pattern recognition. In this paper, we review and formalize three techniques: the soft histogram, the self-study discrete regression, and the interior-outer-set model. To promote the development of this area, in this paper we suggest two open topics: the anti-accuracy principle and the digital image compression technique based on the fuzzy if-then rules extracted by using information matrix technique.
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Dissertations / Theses on the topic "Diffusion techniques"

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Witwit, Abdul-Mehdi Rahim Mohammed. "Meshing techniques for TLM diffusion problems." Thesis, University of Hull, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296281.

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Williams, Catherine F. M. "Diffusion-weighted magnetic resonance imaging techniques." Thesis, University of Aberdeen, 1998. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602003.

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The aim of this project was to compare and evaluate other, non-EPI, diffusion-weighted MRI (DWI) sequences, through imaging experiments, on a phantom and in vivo, (using a 0.95 T system) and computer simulations, and to develop improved DWI methodology which could be implemented on standard hardware. Pulsed gradient spin echo (PGSE) and diffusion-weighted STEAM are slow multiple shot sequences, with measurement times of several minutes. Both sequences are highly sensitive to patient motion, but motion artifact was virtually eliminated using navigator echo phase correction and EGG triggering when diffusion-sensitisation was in the phase-encoding direction. It was demonstrated that both sequences can provide high quality images and allow accurate and straightforward diffusion-coefficient measurement when an imaging time period in the region of 20-30 minutes is available and when diffusion-sensitisation is required in one or two directions. A third direction of diffusion-sensitisation may be feasible if more sophisticated immobilisation or phase correction techniques are employed. A choice between PGSE or STEAM for a given application should take account of the Ti and T2 values of the imaged tissues, since a higher SNR might be provided by STEAM when the T1T2 ratio is high. A diffusion-weighted CE-FAST sequence was implemented with the novel modification of acquisition of a navigator gradient-echo, which was shown to reduce motion artifact when diffusion-sensitisation was in the phase-encoding direction. However, it has been demonstrated by other workers that unknown signal losses due to motion-induced phase incoherence between signal components may remain. The SNR (normalised with respect to the square root of the imaging time) in the phantom and in white matter was similar to that obtained using PGSE, but an advantage of CE- FAST is that it can be performed in a fraction of the measurement time of PGSE. Diffusion-sensitivity was much higher than in other sequences and the diffusion- attenuation was found to agree with an analysis presented in the literature. However, a major disadvantage of the technique, which precludes its use for many DWI applications, is the requirement of accurate knowledge of Ti, T2 and flip angle in order to calculate the diffusion coefficient or tensor. Prior to a study of diffusion-weighted snapshot FLASH, the effects of magnetisation evolution during snapshot FLASH acquisition on image quality and parameter measurement accuracy were first investigated, through phantom experiments and computer simulations, in the context of a r2-weighted snapshot FLASH sequence. It was demonstrated that magnetisation evolution effects can lead to significant error in parameter measurement, but that this error can be eliminated by using crusher gradients to prevent evolved magnetisation from contributing to the acquired signal. However, qualitative effects are not entirely eliminated, since a significant degree of edge blurring may remain, and there is a 50% loss of SNR inherent to the crusher gradient technique. It was then shown, theoretically and experimentally, that in diffusion-weighted snapshot FLASH, the crusher gradient technique not only addresses the problem of magnetisation evolution, but also eliminates the effect of phase shifts arising during the diffusion-preparation sequence.
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Sekerci, Yadigar. "Some recent simulation techniques of diffusion bridge." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-5749.

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We apply some recent numerical solutions to diffusion bridges written in Iacus (2008). One is an approximate scheme from Bladt and S{\o}rensen (2007), another one, from  Beskos et al (2006), is an algorithm which is exact: no numerical error at given grid points!

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Rogerson, Alexandria. "New techniques in diffusion-ordered NMR spectroscopy." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/new-techniques-in-diffusionordered-nmr-spectroscopy(aa3eaee0-984b-4434-b460-8c3118a7c3b2).html.

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The analysis of mixtures is a subject that spans several different analytical techniques. In NMR, a powerful technique for this analysis is Diffusion-Ordered NMR Spectroscopy (DOSY), in which signals from different chemical species can be distinguished by their different diffusion coefficients. DOSY NMR allows an analysis of mixture components and their interactions in a non-invasive way and is proving to be an accurate and time effective method for looking at mixtures.An in-depth analysis of DOSY NMR is presented using the commercial mixture “monoacetin”. The chemically cognate species in this mixture produce complex and overlapping multiplet signals in 1H NMR that are difficult to assign and interpret. A previous analysis of this mixture used 1H NMR together with Liquid Chromatography (LC) and Gas Chromatography (GC) to identify the components present, but failed to provide complete assignments of all the signals. Here, the possibility of using DOSY as an alternative to hyphenated techniques is examined, and it is shown that a full analysis of the spectrum of “monoacetin” is possible with careful selection of experimental parameters and processing techniques, without recourse to chromatography. DOSY NMR can be ineffective when signals overlap and/or diffusion coefficients are similar. Many methods have been proposed to overcome these problems, and some of these are presented here. In order to increase resolving power, it is possible to gather further information about a mixture and incorporate this into diffusion experiments as another dimension. This creates a 3D dataset that can be analysed using a multiway method, such as PARAFAC, to extract the component spectra. This method is explored for the mixture “monoacetin” that has been partially separated by high-performance liquid chromatography. Resolution of two out of four components was achieved from poor HPLC separation; the decomposition obtained the component spectra, diffusional decay and HPLC elution profile for these components. Improved HPLC separation should result in further resolution.Diffusion coefficients of different mixture species can be manipulated by changing the matrix in which they diffuse: Matrix-Assisted DOSY (MAD). Previous techniques have involved either improving resolution in the diffusion domain or aiming to improve resolution in chemical shift. A method is presented here that simultaneously addresses both problems in a chemically-selective way, using lanthanide shift reagents. The chemically-selective binding of the LSR to mixture components can both enhance chemical shift dispersion and increase diffusion resolution in DOSY. This neatly deals with the two main drawbacks of the DOSY experiment, and is demonstrated using a mixture of an alkane, alcohol and aldehyde. The manipulation of a molecule’s electrostatic charge through pH control has been investigated, where small ions with a high charge density would be highly solvated, resulting in a change in D. The effect, however, was not measurable and so the indirect effect of pH on the interaction of charged species with the cationic micelle CTAB is presented, where an increase in resolution between of mixture of aspirin and salicylic acid is achieved.Although DOSY NMR is a powerful tool for mixture analysis, in recent years it has been used for studying molecular interactions. An example of this is presented here where species aggregate under specific conditions, a process identified by DOSY NMR.
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Clement, Meagan E. Couper David J. "Analysis techniques for diffusion tensor imaging data." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2008. http://dc.lib.unc.edu/u?/etd,2010.

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Thesis (DrPH)--University of North Carolina at Chapel Hill, 2008.
Title from electronic title page (viewed Feb. 17, 2009). "... in partial fulfillment of the requirements for the degree of Doctorate of Public Health in the School of Public Health Department of Biostatistics." Discipline: Biostatistics; Department/School: Public Health.
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Mueller, Katherine Elisabeth. "Diffusion in polymers using quartz crystal microbalance techniques /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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Ferguson, R. C. "Numerical techniques for the drift-diffusion semiconductor equations." Thesis, University of Bath, 1996. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362239.

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Bushby, Roger Stanley. "Joining aluminium-based composites using diffusion bonding techniques." Thesis, University of Bath, 1993. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.331934.

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Ismail, Furrukh. "Photovoltaic Process Development and innovative Techniques." Thesis, Högskolan Dalarna, Elektroteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:du-6453.

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Photovoltaic processing is one of the processes that have significance in semiconductor process line. It is complicated due to the no. of elements involved that directly or indirectly affect the processing and final yield. So mathematically or empirically we can’t say assertively about the results specially related with diffusion, antireflective coating and impurity poisoning. Here I have experimented and collected data on the mono-crystal silicon wafers with varying properties and outputs. Then by using neural network with available experimental data output required can be estimated which is further tested by the test data for authenticity. One can say that it’s a kind of process simulation with varying input of raw wafers to get desired yield of photovoltaic mono-crystal cells.
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Symeonidis, Kimon. "The Controlled Diffusion Solidification Process: Fundamentals and Principles." Worcester, Mass. : Worcester Polytechnic Institute, 2009. http://www.wpi.edu/Pubs/ETD/Available/etd-042909-102711/.

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Books on the topic "Diffusion techniques"

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Taira, Kazuaki. Functional Analytic Techniques for Diffusion Processes. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1099-9.

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Fonck, Philippe. Communication sociale et techniques de diffusion. 2nd ed. Bruxelles: De Boeck-Wesmael, 1990.

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Gazagnadou, Didier. La diffusion des techniques et les cultures: Essai. Paris: Kimé, 2008.

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Transmission line matrix (TLM) techniques for diffusion applications. Amsterdam, The Netherlands: Gordon and Breach Science Publishers, 1998.

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Voir la Joconde: Approches muséologiques. Paris: Harmattan, 2014.

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Center, NASA Glenn Research, ed. Novel diffusivity measurement technique. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2001.

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Weickert, Joachim. Anisotropic diffusion in image processing. Stuttgart: B.G. Teubner, 1998.

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Eckman, Richard M. The Suitability of diffusion and wind-field techniques for an emergency-response dispersion model. Silver Spring, Md: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, 1989.

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J, Dobosy Ronald, and Air Resources Laboratory (U.S.), eds. The suitability of diffusion and wind-field techniques for an emergency-response dispersion model. Silver Spring, Md: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Air Resources Laboratory, 1989.

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Michèle, Gellereau, and Groupe de travail Culture et médiation de la Société Française des Sciences de l'Information et de la Communication et le Centre de recherche GERICO de Lille 3,, eds. Médiation des cultures: Actes des journées d'études 26-27 Mars 1999, maison de la Recherche, Université de Lille 3. Villeneuve d'Asq (Nord): Université Charles-de-Gaulle-Lille 3, CeGes, 2000.

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Book chapters on the topic "Diffusion techniques"

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Perrin, Vincent. "Diffusion." In MRI Techniques, 49–102. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118761281.ch2.

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Viehland, Larry A. "Experimental Techniques." In Gaseous Ion Mobility, Diffusion, and Reaction, 51–94. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-04494-7_2.

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Ratneswaren, Tarini, and Tomasz Matys. "Diffusion-Weighted Imaging." In Neuroimaging Techniques in Clinical Practice, 189–202. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-48419-4_13.

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Kashefi, Samira N., and Gavin P. Winston. "Diffusion Tensor Imaging." In Neuroimaging Techniques in Clinical Practice, 203–13. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-48419-4_14.

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Zhuo, Jiachen, and Rao P. Gullapalli. "Diffusion Kurtosis Imaging." In Neuroimaging Techniques in Clinical Practice, 215–28. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-48419-4_15.

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Fletcher, Clive A. J. "Multidimensional Diffusion Equation." In Computational Techniques for Fluid Dynamics 1, 249–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-58229-5_8.

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Fletcher, Clive A. J. "Multidimensional Diffusion Equation." In Computational Techniques for Fluid Dynamics 1, 249–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-97035-1_8.

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Rothman, Steven J. "Experimental Techniques for the Measurement of Diffusion Coefficients." In Diffusion in Materials, 269–86. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-1976-1_10.

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Fletcher, Clive A. J. "One-Dimensional Diffusion Equation." In Computational Techniques for Fluid Dynamics 1, 216–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-58229-5_7.

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Fletcher, Clive A. J. "One-Dimensional Diffusion Equation." In Computational Techniques for Fluid Dynamics 1, 216–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-97035-1_7.

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Conference papers on the topic "Diffusion techniques"

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Pike, E. R., H. J. Gould, and F. Watanabe. "Fluorescence Photobleaching Recovery Measurements of Facilitated Diffusion." In Photon Correlation Techniques and Applications. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/pcta.1988.pcs159.

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The feasibility of a direct measurement of sliding of proteins along a DNA chain by the fluorescence photobleaching recovery technique is demonstrated. The results obtained with a protein, histone H1, provides a firm basis for the understanding of the "facilitated diffusion" mechanism by which site-specific DNA binding proteins are thought to find efficiently their unique loci.
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Wang, Lihong V. "Photoacoustic Tomography: Ultrasonically Breaking through the Optical Diffusion Limit." In Novel Techniques in Microscopy. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/ntm.2013.nw5b.2.

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Lieng, Henrik. "Ray-traced diffusion points." In SIGGRAPH '16: Special Interest Group on Computer Graphics and Interactive Techniques Conference. New York, NY, USA: ACM, 2016. http://dx.doi.org/10.1145/2945078.2945085.

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Wabgonker, Harsha M., Mehron Vaezi, and Behnam Bavarian. "Error diffusion techniques for printing fingerprint images." In Enabling Technologies for Law Enforcement and Security, edited by Lisa A. Alyea and David E. Hoglund. SPIE, 1997. http://dx.doi.org/10.1117/12.265389.

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Nadernejad, E., and H. Hassanpour. "Evaluating diffusion-based image de-noising techniques." In 2007 International Conference on Intelligent and Advanced Systems (ICIAS). IEEE, 2007. http://dx.doi.org/10.1109/icias.2007.4658451.

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Soomro, Shafiullah, and Kwang Nam Choi. "Active Contours Based on An Anisotropic Diffusion." In 2018 Digital Image Computing: Techniques and Applications (DICTA). IEEE, 2018. http://dx.doi.org/10.1109/dicta.2018.8615767.

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Lin, Ying-Hsiu, Hsiao-Mei Wu, and Chia-Lung Hsieh. "High-Speed Single-Particle Tracking: Application to Molecular Diffusion in Biological Membranes." In Novel Techniques in Microscopy. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/ntm.2015.nm3c.4.

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Zuzel, Grzegorz. "Highly Sensitive Measurements of 222Rn Diffusion and Emanation." In TOPICAL WORKSHOP ON LOW RADIOACTIVITY TECHNIQUES: LRT 2004. AIP, 2005. http://dx.doi.org/10.1063/1.2060465.

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Ehler, Martin, Frank Filbir, and Hrushikesh N. Mhaskar. "Learning Biomedical Data Locally using Diffusion Geometry Techniques." In Imaging and Signal Processing in Health Care and Technology. Calgary,AB,Canada: ACTAPRESS, 2012. http://dx.doi.org/10.2316/p.2012.771-036.

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Jamali, Vahid, Arman Ahmadzadeh, Christophe Jardin, Heinrich Sticht, and Robert Schober. "Channel estimation techniques for diffusion-based molecular communications." In 2016 IEEE International Conference on Communications (ICC). IEEE, 2016. http://dx.doi.org/10.1109/icc.2016.7511496.

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Reports on the topic "Diffusion techniques"

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Xiao, X. D. Surface diffusion studies by optical diffraction techniques. Office of Scientific and Technical Information (OSTI), November 1992. http://dx.doi.org/10.2172/7069459.

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Xiao, Xu Dong. Surface diffusion studies by optical diffraction techniques. Office of Scientific and Technical Information (OSTI), November 1992. http://dx.doi.org/10.2172/10131747.

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Cherniak, D. J., W. A. Lanford, and F. J. Ryerson. The use of ion beam techniques to characterize lead diffusion in minerals. Office of Scientific and Technical Information (OSTI), September 1990. http://dx.doi.org/10.2172/6063129.

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Kinney, Steven, and Elisha Peterson. Modeling of Diffusion through a Network: A New Approach using Cellular Automata and Network Science Techniques. Fort Belvoir, VA: Defense Technical Information Center, May 2010. http://dx.doi.org/10.21236/ada521397.

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Glasscott, Matthew, Johanna Jernberg, Erik Alberts, and Lee Moores. Toward the electrochemical detection of 2,4-dinitroanisole (DNAN) and pentaerythritol tetranitrate (PETN). Engineer Research and Development Center (U.S.), March 2022. http://dx.doi.org/10.21079/11681/43826.

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Analytical methods to rapidly detect explosive compounds with high precision are paramount for applications ranging from national security to environmental remediation. This report demonstrates two proof-of-concept electroanalytical methods for the quantification of 2,4-dinitroanisol (DNAN) and pentaerythritol tetranitrate (PETN). For the first time, DNAN reduction was analyzed and compared at a bare graphitic carbon electrode, a polyaniline-modified (PANI) electrode, and a molecularly imprinted polymer (MIP) electrode utilizing PANI to explore the effect of surface-area and preconcentration affinity on the analytical response. Since some explosive compounds such as PETN are not appreciably soluble in water (<10 μg/L), necessitating a different solvent system to permit direct detection via electrochemical reduction. A 1,2-dichloroethane system was explored as a possibility by generating a liquid-liquid extraction-based sensor exploiting the immiscibility of 1,2-dichloroethane and water. The reduction process was explored using a scan rate analysis to extract a diffusion coefficient of 6.67 x 10⁻⁶ cm/s, in agreement with literature values for similarly structured nitrate esters. Once further refined, these techniques may be extended to other explosives and combined with portable electrochemical hardware to bring real-time chemical information to soldiers and citizens alike.
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McAlary, Todd. Development of More Cost-Effective Methods for Long-Term Monitoring of Soil Vapor Intrusion to Indoor Air Using Quantitative Passive Diffusive-Adsorptive Sampling Techniques. Fort Belvoir, VA: Defense Technical Information Center, May 2015. http://dx.doi.org/10.21236/ada621730.

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Étude de faisabilité d’un service générique d’accueil et de diffusion des données simples : recueil des besoins et des contraintes des usagers. Ministère de l'enseignement supérieur et de la recherche, November 2020. http://dx.doi.org/10.52949/13.

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Le document présente les besoins et contraintes des usagers concernant la création d'un entrepôt générique national, première phase de l'étude de faisabilité. Il détaille les attentes concernant l'entrepôt, reposant sur la confiance, la qualité et la responsabilité, et celles portant sur les différents types d'usagers sur un plan technique et fonctionnel.
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