Bibliografie tematiche / Complex and disordered medium

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Letteratura scientifica selezionata sul tema "Complex and disordered medium"

Autore: Grafiati
Pubblicato: 7 settembre 2024

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Articoli di riviste sul tema "Complex and disordered medium"

1

Turik, A. V., L. A. Reznitchenko, A. I. Chernobabov, G. S. Radchenko, S. A. Turik e M. G. Radchenko. "Elastic Constants Relaxation in Disordered Heterogeneous Systems". Solid State Phenomena 115 (agosto 2006): 215–20. http://dx.doi.org/10.4028/www.scientific.net/ssp.115.215.

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Using self-consistent effective-medium theory, we studied the complex elastic compliances of conducting disordered heterogeneous piezoelectric-polymer systems. The considered system is a random mixture of piezoelectric spheroids and polymer ones with the same orientation. The proximate cause of the effective elastic constants frequency dependencies was considered. The nature of the obtained spectra was analyzed.
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Zhu, Hongyang, Bingquan Zhao, Zhi Liu, Zhen He, Lihong Dong, Hongyu Gao e Xiaoming Zhao. "Boundary Feedback Fiber Random Microcavity Laser Based on Disordered Cladding Structures". Photonics 11, n. 5 (16 maggio 2024): 467. http://dx.doi.org/10.3390/photonics11050467.

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The cavity form of complex microcavity lasers predominantly relies on disordered structures, whether found in nature or artificially prepared. These structures, characterized by disorder, facilitate random lasing through the feedback effect of the cavity boundary and the internal scattering medium via various mechanisms. In this paper, we report on a random fiber laser employing a disordered scattering cladding medium affixed to the inner cladding of a hollow-core fiber. The internal flowing liquid gain establishes a stable liquid-core waveguide environment, enabling long-term directional coupling output for random laser emission. Through theoretical analysis and experimental validation, we demonstrate that controlling the disorder at the cavity boundary allows liquid-core fiber random microcavities to exhibit random lasing output with different mechanisms. This provides a broad platform for in-depth research into the generation and control of complex microcavity lasers, as well as the detection of scattered matter within micro- and nanostructures.
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Pouye, Serigne Fallou, Ibrahima Cisse, Libasse Diop, Alessandro Dolmella e Sylvain Bernès. "Crystal structure of μ-oxalato-κ2O1:O2-bis[(dimethyl sulfoxide-κO)triphenyltin(IV)]". Acta Crystallographica Section E Crystallographic Communications 73, n. 7 (13 giugno 2017): 1033–36. http://dx.doi.org/10.1107/s2056989017008519.

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In the previously reported [C2O4(SnPh3)2] complex [Diopet al.(2003).Appl. Organomet. Chem.17, 881–882.], the SnIVatoms are able to formally complete their coordination by addition of dimethyl sulfoxide (DMSO) molecules provided by the reaction medium, affording the title complex, [Sn2(C6H5)6(C2O4)(C2H6OS)2]. The SnIVatoms are then pentacoordinated, with a commontranstrigonal–bipyramidal arrangement. The asymmetric unit contains one half-molecule, which is completed by inversion symmetry in space group typeC2/c. The inversion centre is placed at the mid-point of the central bis-monodentate oxalate dianion, C2O42−, which bridges the [(SnPh3)(DMSO)] moieties. The molecule crystallizes as a disordered system, with two phenyl rings disordered by rotation about their Sn—C bonds, while the DMSO molecule is split over two positions due to a tetrahedral inversion at the S atom. All disordered parts were refined with occupancies fixed of 0.5.
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Thompson, Avery. "Finding order within intrinsically disordered proteins". Scilight 2022, n. 11 (18 marzo 2022): 111105. http://dx.doi.org/10.1063/10.0009917.

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Tian, Zean, Zhongyang Zhang, Xiao Jiang, Feng Wei, Shen Ping e Fan Wu. "LaSCA: A Visualization Analysis Tool for Microstructure of Complex Systems". Metals 13, n. 2 (17 febbraio 2023): 415. http://dx.doi.org/10.3390/met13020415.

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Over the past few decades, plenty of visualization software for the structural analysis of disordered/complex systems has been developed, but the uniqueness and correctness of structural quantification for such systems are still challenging. This paper introduces a visualization analysis tool based on the largest standard cluster analysis (LaSCA), which satisfies the three essential requirements for general structural analysis: physical correctness, objective identification, and injective representation. The specific functionalities of LaSCA include the directed graph model of complex systems, novel structural parameters, topologically close-packed structures, arbitrary partial pair distribution functions, the identification of long-range ordered structures, the adaptive selection of graphical elements, the tracking display of atom ID, user-defined view angles, various options for atom selection, and so on. The program is efficiently based on OpenGL hardware acceleration, employing special algorithms to treat bonds as cylinders or lines and treat atoms as spheres, icosahedrons, tetrahedrons, or points. LaSCA can process more than 1.2 million atoms within 50 s on a PC with 1 GB memory and four cores (Intel Core i7-9700). It is robust and low-cost for surveying short-, medium-, and long-range ordered structures and tracking their evolutions.
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Larose, Eric, Ludovic Margerin, Arnaud Derode, Bart van Tiggelen, Michel Campillo, Nikolai Shapiro, Anne Paul, Laurent Stehly e Mickael Tanter. "Correlation of random wavefields: An interdisciplinary review". GEOPHYSICS 71, n. 4 (luglio 2006): SI11—SI21. http://dx.doi.org/10.1190/1.2213356.

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This paper presents an interdisciplinary review of the correlation properties of random wavefields. We expose several important theoretical results of various fields, ranging from time reversal in acoustics to transport theory in condensed matter physics. Using numerical simulations, we introduce the correlation process in an intuitive manner. We establish a fruitful mapping between time reversal and correlation, which enables us to transpose many known results from acoustics to seismology. We show that the multiple-scattering formalism developed in condensed matter physics provides a rigorous basis to analyze the field correlations in disordered media. We discuss extensively the various factors controlling and affecting the retrieval of the Green’s function of a complex medium from the correlation of either noise or coda. Acoustic imaging of complex samples in the laboratory and seismic tomography of geologic structures give a glimpse of the promising wide range of applications of the correlation method.
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Aoyu, Zhang, Wang Fuqiang, Dong Yan, Yang Dongling e Xie Weixin. "Dependent scattering criterion modification of disordered dispersed particulate medium with the consideration of particle random distribution and high complex refractive index effects". International Journal of Heat and Mass Transfer 197 (novembre 2022): 123331. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2022.123331.

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Grava, S., Y. He, S. Wu e D. E. Chang. "Renormalization group analysis of near-field induced dephasing of optical spin waves in an atomic medium". New Journal of Physics 24, n. 1 (1 gennaio 2022): 013031. http://dx.doi.org/10.1088/1367-2630/ac465d.

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Abstract While typical theories of atom–light interactions treat the atomic medium as being smooth, it is well-known that microscopic optical effects driven by atomic granularity, dipole–dipole interactions, and multiple scattering can lead to important effects. Recently, for example, it was experimentally observed that these ingredients can lead to a fundamental, density-dependent dephasing of optical spin waves in a disordered atomic medium. Here, we go beyond the short-time and dilute limits considered previously, to develop a comprehensive theory of dephasing dynamics for arbitrary times and atomic densities. In particular, we develop a novel, non-perturbative theory based on strong disorder renormalization group (RG), in order to quantitatively predict the dominant role that near-field optical interactions between nearby neighbors has in driving the dephasing process. This theory also enables one to capture the key features of the many-atom dephasing dynamics in terms of an effective single-atom model. These results should shed light on the limits imposed by near-field interactions on quantum optical phenomena in dense atomic media, and illustrate the promise of strong disorder RG as a method of dealing with complex microscopic optical phenomena in such systems.
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Moura, Francisco A., Wagner A. Barbosa, Edwin F. Duarte, Danyelle P. Silva, Mauro S. Ferreira, Liacir S. Lucena e João M. de Araújo. "Patched Green's function method applied to acoustic wave propagation in disordered media: an interdisciplinary approach". Journal of Geophysics and Engineering 17, n. 5 (11 settembre 2020): 914–22. http://dx.doi.org/10.1093/jge/gxaa052.

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Abstract Modern visualization can be formulated as inversion problems that aim to obtain structural information about a complex medium through wave excitations. However, without numerically efficient forward calculations, even state-of-the-art inversion procedures are too computationally intensive to implement. We adapt a method previously used to treat transport in electronic waveguides to describe acoustic wave motion in complex media with high gains in computational time. The method consists of describing the system as if it was made of disconnected parts that are patched together. By expressing the system in this manner, wave-propagation calculations that otherwise would involve a very large matrix can be done with considerably smaller matrices instead. In particular, by treating one of such patches as a target whose parameters are changeable, we are able to implement target-oriented optimization in which the model parameters can be continuously refined until the ideal result is reproduced. The so-called Patched Green's function (PGF) approach is mathematically exact and involves no approximations, thus improving the computational cost without compromising accuracy. Given the generality of our method, it can be applied to a wide variety of inversion problems. Here we apply it to the case of seismic modeling where acoustic waves are used to map the earth subsurface in order to identify and explore mineral resources. The technique is tested with realistic seismic models and compared to standard calculation methods. The reduction in computational complexity is remarkable and paves the way to treating larger systems with increasing accuracy levels.
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Jensen, Oliver E., e Igor L. Chernyavsky. "Blood Flow and Transport in the Human Placenta". Annual Review of Fluid Mechanics 51, n. 1 (5 gennaio 2019): 25–47. http://dx.doi.org/10.1146/annurev-fluid-010518-040219.

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The placenta is a multifunctional organ that exchanges blood gases and nutrients between a mother and her developing fetus. In humans, fetal blood flows through intricate networks of vessels confined within villous trees, the branches of which are bathed in pools of maternal blood. Fluid mechanics and transport processes play a central role in understanding how these elaborate structures contribute to the function of the placenta and how their disorganization may lead to disease. Recent advances in imaging and computation have spurred significant advances in simulations of fetal and maternal flows within the placenta across a range of length scales. Models describe jets of maternal blood emerging from spiral arteries into a disordered and deformable porous medium, as well as solute uptake by fetal blood flowing through elaborate three-dimensional capillary networks. We survey recent developments and emerging challenges in modeling flow and transport in this complex organ.
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Tesi sul tema "Complex and disordered medium"

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Franosch, Thomas. "Complex transport in strongly disordered materials". Diffusion fundamentals 16 (2011) 17, S. 1, 2011. https://ul.qucosa.de/id/qucosa%3A12695.

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Franosch, Thomas. "Complex transport in strongly disordered materials". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-184699.

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Zheleva, Zhasmina Vasileva. "Surface crystallography of complex and disordered surfaces". Thesis, University of Reading, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553057.

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Salemeh, Elie. "Periodic structures : transmission invariance and symmetry effects". Electronic Thesis or Diss., Le Mans, 2024. http://www.theses.fr/2024LEMA1010.

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Une caractéristique du régime localisé dans un milieu désordonné est l’insensibilité du speckle transmis à l’ondeincidente. En optique, l’image sur un écran du champ transmis à travers un milieu désordonné opaque - le speckle- est la même quelles que soient les conditions d’éclairage. Ce phénomène remarquable peut être expliqué parl’analyse des modes propres de transmission du matériau étudié. Le régime localisé se caractérise par laprédominance d’un unique mode, la transmission de tous les autres étant significativement plus faible. Le motifdu champ transmis est alors déterminé par ce seul mode, indépendamment de la source. Un phénomène analogueest possible dans un milieu ordonné, périodique, lorsque l’onde propagée dans le milieu est principalement portéepar un unique mode de Bloch. L’onde propagée dans le milieu périodique est alors progressivement « gelée »,présentant un même motif, quelque soit la source qui l’a générée. Le travail présenté vise à caractériser etobserver expérimentalement ce phénomène dans le cas de la propagation dans un guide d’onde périodique. Il viseaussi à caractériser ce phénomène dans le cas de la transmission à travers un réseau de diffraction. Finalementnous nous intéressons aux effets de la symétrie lorsqu’une barrière opaque est placée dans un guide d’ondespériodique, en particulier au gain de la transmission induit par la symétrie
A characteristic of the localized regime in a disordered medium is the insensitivity of the transmitted speckle tothe incident wave. In optics, the image on a screen of the transmitted field through an opaque disordered medium- the speckle - remains the same regardless of the lighting conditions. This remarkable phenomenon can beexplained by analyzing the eigenmodes of transmission of the studied material. The localized regime ischaracterized by the predominance of a single mode, with the transmission of all other modes being significantlyweaker. The pattern of the transmitted field is then determined by this single mode, regardless of the source. Asimilar phenomenon is possible in an ordered, periodic medium, when the wave propagated in the medium ismainly carried by a single Bloch mode. The wave propagated in the periodic medium is then gradually "frozen",presenting the same pattern, regardless of the source that generated it. The presented work aims to characterizeand to observe experimentally this phenomenon in the case of propagation in a periodic waveguide. It also aims tocharacterize this phenomenon in the case of transmission through a diffraction grating. Finally, we are interestedin the effects of symmetry when an opaque barrier is placed in a periodic waveguide, specifically focusing on thetransmission enhancement induced by symmetry
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Caldas, Vania Santos. "Investigation of a transcription factor complex and intrinsically disordered proteins". Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/17944.

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LIM domain binding protein 1 (Ldb1) is a chromatin looping factor that forms part of a transcriptional ‘pentameric complex’. Ldb1 contains two domains that are essential for looping: a self-association domain, and a LIM interaction domain (LID) that binds LIM proteins such as Lmo2, which in turn binds to DNA binding transcription factors, Tal1, E2a and Gata-1. It was proposed that the Gata-1 binding protein FOG1 could bind to the pentameric complex. GFP-tagged FOG1 was shown to bind the complex by multi angle laser light scattering, providing a mechanism by which the intrinsically weak Gata-1/FOG1 interaction is bolstered through binding to other units of the pentameric complex. Little is known about proteins that are distantly related to mammalian Ldb1. Two such proteins, Ldb1 from C. elegans and Adn1 from S. pombe were expressed in bacteria. They had generally poor solubility, but use of a maltose binding protein tag promoted solubility, and different expression systems may enable their further study. Ldb1 was reported to bind the E3 ubiquitin ligase protein, RLIM. No interaction could be detected between these proteins by yeast two-hybrid analysis using truncated or full length proteins. The interaction was detected in mammalian cells using FLAG pull-down experiments, but truncation mutants of these proteins could not be expressed. RLIM has high levels of predicted disorder, which may contribute to its degradation in both cell types. An assay was developed in which dimerization domains could stabilise disordered binding regions. Constructs containing GST, a coiled-coil domain of CtIP, or the leucine zipper of GCN4, were tethered to a test peptide and assayed for binding in yeast two-hybrid assays. The domains from CtIP and/or GCN4 allowed the interaction to be detected. Although the assay could not detect an interaction between RLIM and Ldb1, it shows promise for detecting interactions for disordered proteins, and can be adapted to different expression systems.
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Amoah, T. K. "Designer disordered complex media : hyperuniform photonic and phononic band gap materials". Thesis, University of Surrey, 2016. http://epubs.surrey.ac.uk/812500/.

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In this thesis we investigate designer disordered complex media for photonics and phononics applications. Initially we focus on the photonic properties and we analyse hyperuniform disordered structures (HUDS) using numerical simulations. Photonic HUDS are a new class of photonic solids, which display large, isotropic photonic band gaps (PBG) comparable in size to the ones found in photonic crystals (PC). We review their complex interference properties, including the origin of PBGs and potential applications. HUDS combine advantages of both isotropy due to disorder (absence of long-range order) and controlled scattering properties from uniform local topology due to hyperuniformity (constrained disorder). The existence of large band gaps in HUDS contradicts the long-standing intuition that Bragg scattering and long-range translational order is required in PBG formation, and demonstrates that interactions between Mie-like local resonances and multiple scattering can induce on their own PBGs. The discussion is extended to finite height effects of planar architectures such as pseudo-band-gaps in photonic slabs as well as the vertical confinement in the presence of disorder. The particular case of a silicon-on-insulator compatible hyperuniform disordered network structure is considered for TE polarised light. We address technologically realisable designs of HUDS including localisation of light in point-defect-like optical cavities and the guiding of light in free-form PC waveguide analogues. Using finite-difference time domain and band structure computer simulations, we show that it is possible to construct optical cavities in planar hyperuniform disordered solids with isotropic band gaps that efficiently confine TE polarised radiation. We thus demonstrate that HUDS are a promising general-purpose design platform for integrated optical micro-circuitry. After analysing HUDS for photonic applications we investigate them in the context of elastic waves towards phononics applications. We demonstrate the first phononic band gaps (PnBG) for HUDS. We find that PnBGs in phononic HUDS can confine and guide elastic waves similar to photonic HUDS for EM radiation.
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McDowell, Chester Dale. "Potential heterogeneity in p53/S100B(ββ) complex". Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/13845.

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Master of Science
Department of Biochemistry
Jianhan Chen
Paul E. Smith
Intrinsically disordered proteins have been shown to be important in many physiological processes, including cell signaling, translation, and transcription. They are also associated with cancer, and neurodegenerative diseases. The tumor suppressor p53 contains several disordered regions, including the C-terminal negative regulatory domain (NRD). In cancer the function of p53 has been shown to be repressed by S100B(ββ) binding to p53-NRD. Binding of S100B(ββ) blocks acetylation and phosphorylation sites in the p53-NRD, which leads to tetramer dissociation and prevents p53 activation. NMR studies have shown that p53-NRD binds S100B(ββ) in a stable α-helix conformation. Interestingly, despite the well-converged and apparent rigid nature of the NMR structure ensemble, a majority of intermolecular NOEs used to calculate the NMR ensemble are very weak (≥6 Å). The final NMR structures also contains unsatisfied buried charged residues at the binding interface. It’s plausible that the p53-S100B(ββ) complex is more dynamic than previously believed. The goal of the study is to determine the potential conformational heterogeneity in p53-S100B(ββ) complex using molecular modeling. For this, five diverse structures were selected from the 40-member NMR ensemble. For each initial conformation, we performed 100 ns molecular dynamic simulations in explicit solvent to explore the structure and dynamics of the p53-NRD in complex with S100B(ββ). Several analytical tools were used to characterize the p53-NRD conformation, including root-mean squared deviation (RMSD), root-mean squared fluctuation (RMSF), and residue helicity. The accuracy of the simulations was mainly assessed by comparing with experimental NOEs. The results show that, even though the ensemble is heterogeneous it satisfies 82% of the experimental NOEs. Clustering analysis further suggests that many conformational sub-states coexist for this complex, and individual clusters appear to satisfy only subsets of NOE distances. Importantly, the buried surface analysis demonstrates that the heterogeneous ensemble generated from MD provides similar shielding of key residues, which include post-translational modification residues needed for p53 activation. This study also demonstrates that atomistic simulations can provide important insights into structure and dynamics of IDPs for understanding their biological function.
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Adams, Ruth Nanette. "An examination and evaluation of primary nursing care and treatment provided for medium stay patients at Broadmoor Special Hospital". Thesis, University of East London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286558.

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Shakhov, Alexander. "Structure-Dynamics Relationships in Complex Fluids and Disordered Porous Solids Assessed using NMR". Doctoral thesis, Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-153105.

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A NMR study of the structure-dynamics relationships in heterogeneous materials is presented. In the first part, transport in soft-matter systems is studied using the pulsed field gradient NMR technique (PFG NMR). The molecular crowding effect in biological matter has been addressed using polymer solutions as model systems. By performing ensemble-based diffusion studies, the earlier obtained data on anomalous diffusion have been complemented. The transition to normal diffusion on a larger time scale has been shown. Taking advantages of the NMR approach, transport properties of microemulsions consisting of micellar colloids dissolved in liquid crystals have been investigated. The self-diffusivities measured under equilibrium conditions have shown weak correlations with microscopic ordering and macroscopic phase transitions occurring in the systems under study. The formation of micelles is shown to be decisive for macroscopic separation at the isotropic-nematic transition. The second part of the thesis covers heterogeneous effects in diffusion for fluids in porous solids, as probed using a combination of NMR diffusometry and structure characterization methods. Ionic liquids have been investigated, revealing a complex behavior under confinement. The attempts to correlate the observed characteristics of the ionic liquids with their internal chemical structure were undertaken. Finally, the series of nanoporous glasses with tunable pore structure characteristics were studied. Strong correlations between their structure and the preparation conditions as well as between the resulting transport properties have been shown.
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Rous, Philip James. "Dynamical theories of low energy electron diffraction from disordered and complex reconstructed surfaces". Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38149.

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Libri sul tema "Complex and disordered medium"

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Coffey, William T., e Yuri P. Kalmykov, a cura di. Fractals, Diffusion, and Relaxation in Disordered Complex Systems. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471790265.

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Coffey, William T., e Yuri P. Kalmykov, a cura di. Fractals, Diffusion, and Relaxation in Disordered Complex Systems. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2006. http://dx.doi.org/10.1002/0470037148.

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1948-, Coffey William, e Kalmykov Yu P, a cura di. Fractals, diffusion and relaxation in disordered complex systems. Hoboken, N.J: Wiley, 2006.

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Corrections Facilities Siting Authority (Or.), a cura di. Milliron Road, Stimpson Gulch: Sites selected by the Siting Authority for men's medium security prison complex. Salem, OR: Corrections Facilities Siting Authority, 1997.

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Morozko, Natalya, e Valyentina Didyenko. Financial relations small business energy complex. ru: INFRA-M Academic Publishing LLC., 2016. http://dx.doi.org/10.12737/21561.

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The paper deals with the peculiarities of small organizations in the energy sector, taking into account the principles of effective financial cooperation of small businesses with a variety of large and medium-sized structures. We studied the experience of the financial relations of countries with developed economies on a set of market tools and in business management in the energy sector. The analysis of the financial condition of small organizations and energy sector. Defined financial planning tools of organizations that allow to carry out the relationship of financial planning practices with the main objectives of a small organization. Reasoned application of the tax policy in the system of financial relations for small and large businesses and energy complex. The conditions for the use of alternative financial services market lending small business operations using efficient technologies.
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Baryshev, Ruslan. Proactive library in the information and educational environment of the University. ru: INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1123649.

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In the monograph, the University library is presented as a complex system that includes elements of various properties and varying complexity. As in any system, structural change inevitably affects the performance of all its components. In this regard, the library is an element of the information and educational environment of the University, which is designed to support and improve the effectiveness of educational and scientific activities. The article reveals the concept of active University library" as a system for providing information services to the reader in any form and on any medium based on classical and network forms of service based on query advance services. The article analyzes the opportunities provided by the active University library for its users. The mechanism of activation of an electronic library through selective provision of information is considered, and the principle of the influence of an active electronic library on its proactivity is approved. For all those interested in librarianship and Informatization of education."
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Murphy, Jill, e Laura Rascaroli, a cura di. Theorizing Film Through Contemporary Art. NL Amsterdam: Amsterdam University Press, 2020. http://dx.doi.org/10.5117/9789462989467.

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As the cinematic experience becomes subsumed into today's ubiquitous technologies of seeing, contemporary artworks lift the cinematic out of the immateriality of the film screen and separate it into its physical components within the gallery space. How to read these reformulations of the cinematic medium - and their critique of what it is and has been? In Theorizing Cinema Through Contemporary Art: Expanding Cinema, leading film theorists consider artworks that incorporate, restage, and re-present cinema's configuration of the key categories of space, experience, presence/absence, production and consumption, technology, myth, perception, event, and temporality, so interrogating the creation, appraisal, and evolution of film theory as channeled through contemporary art. This book takes film theory as a blueprint for the moving image, and juxtaposes it with artworks that render cinema as a material object. In the process, it unfolds a complex relationship between a theory and a practice that have commonly been seen as virtually incompatible, renewing our understanding of each and, more to the point, their interactions.
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Coffey, William T., Yuri P. Kalmykov e Stuart A. Rice. Fractals, Diffusion, and Relaxation in Disordered Complex Systems, Part A. Wiley & Sons, Incorporated, John, 2008.

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Advances in Chemical Physics, Fractals, Diffusion and Relaxation in Disordered Complex Systems. Wiley & Sons Canada, Limited, John, 2006.

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Coffey, William T., Yuri P. Kalmykov e Stuart A. Rice. Fractals, Diffusion, and Relaxation in Disordered Complex Systems, Part B Part A. Wiley & Sons, Incorporated, John, 2006.

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Capitoli di libri sul tema "Complex and disordered medium"

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Loudon, Rodney. "Optics of Ordered and Disordered Atomic Media". In Diffuse Waves in Complex Media, 213–47. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4572-5_8.

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Akkermans, E., e G. Montambaux. "Coherent Multiple Scattering in Disordered Media". In Waves and Imaging through Complex Media, 29–52. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0975-1_3.

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Sigalas, M. M., C. T. Chan e C. M. Soukoulis. "Propagation of electromagnetic waves in two-dimensional disordered systems". In Wave Propagation in Complex Media, 225–46. New York, NY: Springer New York, 1998. http://dx.doi.org/10.1007/978-1-4612-1678-0_11.

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Skipetrov, S. E., e R. Maynard. "Diffuse Waves in Nonlinear Disordered Media". In Wave Scattering in Complex Media: From Theory to Applications, 75–98. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0227-1_5.

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Pichard, J. L. "Random Matrix Theory of Scattering in Chaotic and Disordered Media". In Waves and Imaging through Complex Media, 125–40. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0975-1_6.

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Rusek, Marian, e Arkadiusz Orlowski. "Anderson Localization of Electromagnetic Waves in Confined Disordered Dielectric Media". In Wave Scattering in Complex Media: From Theory to Applications, 213–28. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0227-1_12.

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Lodahl, P., G. Soest, J. Gómez Rivas, R. Sprik e A. Lagendijk. "Propagation of Light in Strongly Disordered Photonic Materials and Random Lasers". In Wave Scattering in Complex Media: From Theory to Applications, 21–44. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0227-1_2.

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Zhang, Zhao-Qing, e Xiangdong Zhang. "Statistics of Reflected Speckle Intensities Arising from Localized States Inside the GAP of Disordered Photonic Crystals". In Wave Scattering in Complex Media: From Theory to Applications, 241–54. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0227-1_14.

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Gooch, Jan W. "Complex Medium". In Encyclopedic Dictionary of Polymers, 884. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_13441.

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Kitahara, Kazuo, Hikaru Araki e Kazuo Nakazato. "Transport in a Topologically Disordered Medium". In Dislocations in Solids, 117–20. London: CRC Press, 2023. http://dx.doi.org/10.1201/9780429070914-25.

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Atti di convegni sul tema "Complex and disordered medium"

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Moreno, Angel J. "Dynamics of a rod in a homogeneous/inhomogeneous frozen disordered medium: Correlation functions and non-Gaussian effects". In SLOW DYNAMICS IN COMPLEX SYSTEMS: 3rd International Symposium on Slow Dynamics in Complex Systems. AIP, 2004. http://dx.doi.org/10.1063/1.1764227.

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Kovalenko, Andriy, e Orest Pizio. "Adsorption of a network-forming fluid in a disordered porous medium from the Replica Ornstein-Zernike equations". In The 8th tohwa university international symposium on slow dynamics in complex systems. AIP, 1999. http://dx.doi.org/10.1063/1.58455.

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Rothe, Stefan, David Krause, Qian Zhang, Dennis Pohle, Nektarios Koukourakis e Jürgen W. Czarske. "Learning to control the complex light propagation through few-mode fiber without a reference wave". In CLEO: Science and Innovations. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/cleo_si.2023.sm3l.5.

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We show reference-less transmission matrix measurements using a neural network operating with up to 23 modes in real-time. We use synthetic training data enabling optical predistortion through an SLM for light control through disordered media.
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Spotnitz, Matthew Emerson, Abigail Pribisova, Raktim Sarma e Jayson Briscoe. "Classification of Energy Densities of Transmission Eigenchannels of Complex Photonic Media using Machine Learning". In CLEO: Applications and Technology. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/cleo_at.2023.jtu2a.157.

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We demonstrate classification of energy densities of transmission eigenchannels and corresponding disorder strength of a single configuration of a complex medium using supervised machine learning techniques with an accuracy greater than 95 %.
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Kharaghani, A., T. S. Pham, B. Chareyre e E. Tsotsas. "A pore-scale study on the drying kinetics and mechanical behavior of particle aggregates". In 21st International Drying Symposium. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7388.

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A discrete thermo-mechanical drying model is developed to investigate the interaction between the porous structure and the drying characteristics of dense particle aggregates. The solid phase consists of polydisperse spherical particles in the micrometer range and the void space is constructed by a complementary network of tetrahedral pores. A modified version of the classical invasion percolation algorithm is set up to describe the preferential evaporation of the confined liquid in the pores. Thus, the evolution of the liquid distribution throughout the complex disordered medium can be simulated. In a one-way coupling scheme, capillary forces caused by both fluid pressure and surface tension are computed over time from the filling state of pores and they are applied as loads on each primary particle in the discrete element method. Based on this robust approach the drying kinetics and the mechanical behavior of several different aggregates with various fractions of small and large particles are simulated and quantified.Keywords: Pore network model; discrete element method; Solid-fluid interaction; capillary force, Convective drying.
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Kuhl, U. "Microwave experiments on correlated disorder". In Mesoscopic Physics in Complex Media. Les Ulis, France: EDP Sciences, 2010. http://dx.doi.org/10.1051/iesc/2010mpcm01017.

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Izrailev, F. M. "Anderson localization and correlated disorder". In Mesoscopic Physics in Complex Media. Les Ulis, France: EDP Sciences, 2010. http://dx.doi.org/10.1051/iesc/2010mpcm01006.

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Su, Sheng, Jian-Jun Liu, Jing-Lun Fu, Jie Hu e Bai-Tao An. "Numerical Investigation of Fluid Flow and Heat Transfer in a Turbine Blade With Serpentine Passage and Latticework Cooling". In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-50392.

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This paper describes 3D numerical simulations of a turbine rotor blade with complex internal cooling structure. Conjugate heat transfer method is used to get an accurate blade temperature distribution. The cooling structure consists of a rib roughened serpentine channel near the leading edge, latticework cooling channels in the middle part and slots at the trailing edge. Both the rib roughened channel and the latticework cooling channels can enhance the heat transfer. Furthermore, the latticework cooling channels can enhance the blade strength. Different cooling structures are simulated and analyzed, including changing the configuration of the latticework cooling channels, and whether to apply two holes to the blade tip or not. The effects of different internal cooling configurations are as follows. Firstly, blade temperature distribution is highly disordered: low temperature at the U turning of the serpentine passage, medium temperature at the location of latticework in a relatively uniform distribution, and a few hot spots on the trailing edge. Secondly, tip holes can improve the cooling in serpentine passage by improving fluid flow at the U turning with a negative impact on the cooling of latticework and trailing edge slots. Thirdly, smaller width to height ratio of the sub passage in latticework channels increases coolant flow resistance and leads to an improved latticework cooling with also a negative impact on the cooling of trailing edge slots.
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Choi, Wonjun, Allard P. Mosk, Q.-Han Park e Wonshik Choi. "Eigenmodes in a randomly disordered medium". In Quantum Electronics and Laser Science Conference. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/qels.2011.qthf4.

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Parisi, Giorgio. "Stochastic stability". In Disordered and complex systems. AIP, 2001. http://dx.doi.org/10.1063/1.1358166.

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Rapporti di organizzazioni sul tema "Complex and disordered medium"

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Helgeson, Jennifer F., Juan F. Fung, Alfredo R. Roa Henriquez, Yating Zhang, Ariela Zycherman, Claudia Nierenberg, David T. Butry e Donna Ramkissoon. Complex event resilience of small- and medium-sized enterprises:. Gaithersburg, MD: National Institute of Standards and Technology, settembre 2020. http://dx.doi.org/10.6028/nist.sp.1258.

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Helgeson, Jennifer F., Juan F. Fung, Alfredo R. Roa Henriquez, Yating Zhang, Ariela Zycherman, Claudia Nierenberg, David T. Butry e Donna Ramkissoon. Complex event resilience of small- and medium-sized enterprises:. Gaithersburg, MD: National Institute of Standards and Technology, settembre 2020. http://dx.doi.org/10.6028/nist.sp.1259.

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Nafi Toksoez, M. Characterization of an Explosion Source in a Complex Medium by Modeling and Wavelet Domain Inversion. Fort Belvoir, VA: Defense Technical Information Center, giugno 2006. http://dx.doi.org/10.21236/ada455323.

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Dutra, Lauren M., Matthew C. Farrelly, Brian Bradfield, Jamie Ridenhour e Jamie Guillory. Modeling the Probability of Fraud in Social Media in a National Cannabis Survey. RTI Press, settembre 2021. http://dx.doi.org/10.3768/rtipress.2021.mr.0046.2109.

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Cannabis legalization has spread rapidly in the United States. Although national surveys provide robust information on the prevalence of cannabis use, cannabis disorders, and related outcomes, information on knowledge, attitudes, and beliefs (KABs) about cannabis is lacking. To inform the relationship between cannabis legalization and cannabis-related KABs, RTI International launched the National Cannabis Climate Survey (NCCS) in 2016. The survey sampled US residents 18 years or older via mail (n = 2,102), mail-to-web (n = 1,046), and two social media data collections (n = 11,957). This report outlines two techniques that we used to problem-solve several challenges with the resulting data: (1) developing a model for detecting fraudulent cases in social media completes after standard fraud detection measures were insufficient and (2) designing a weighting scheme to pool multiple probability and nonprobability samples. We also describe our approach for validating the pooled dataset. The fraud prevention and detection processes, predictive model of fraud, and the methods used to weight the probability and nonprobability samples can be applied to current and future complex data collections and analysis of existing datasets.
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Birchmore, Roger. Medium-density Dwellings in Auckland and the Building Regulations. Unitec ePress, luglio 2018. http://dx.doi.org/10.34074/ocds.0822.

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National thermal standards have historically been set to minimise winter heating energy in detached houses. It is uncertain whether these standards are optimal for the increasing number of joined, medium-density dwellings when summer and winter conditions are considered. Using freely available software, annual heating energy use and summertime peak temperatures were calculated for a number of versions of detached and joined dwellings offering the same occupied volume and window areas. Initial results indicated that, as expected, the joined dwellings required less heating energy. The detached house exhibited a higher peak summertime temperature but a lower overall average daily temperature. Interventions such as changing insulation, glazing areas and ventilation were calculated to reduce summertime temperatures in the joined dwelling. Increasing ventilation provided the greatest improvement particularly during the sensitive sleeping hours. Changes to clauses H1 Energy Efficiency, G4 ventilation and G6 Airborne and Impact Sound are recommended if these early findings are confirmed in a more complex simulation.
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Helgeson, Jennifer F., Juan F. Fung, Alfredo R. Roa-Henríquez, Ariela Zycherman, Payam Aminpour, Claudia Nierenberg, David T. Butry e Donna Ramkissoon. Eliciting Lessons from Small- and Medium-Sized Enterprises for Resilience During and Following Complex Events: Longitudinal Data Collection (Wave 2). National Institute of Standards and Technology, maggio 2021. http://dx.doi.org/10.6028/nist.dci.003.

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Wilson, D., Vladimir Ostashev e Max Krackow. Phase-modulated Rice model for statistical distributions of complex signals. Engineer Research and Development Center (U.S.), agosto 2023. http://dx.doi.org/10.21079/11681/47379.

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The basic Rice model is commonly used to describe complex signal statistics from randomly scattered waves. It correctly describes weak (Born) scattering, as well as fully saturated scattering, and smoothly interpolates between these extremes. However, the basic Rice model is unsuitable for situations involving scattering by random inhomogeneities spanning a broad range of spatial scales, as commonly occurs for sound scattering by turbulence in the atmospheric boundary layer and other scenarios. In such scenarios, the phase variations are often considerably stronger than those predicted by the basic Rice model. Therefore, the basic Rice model is extended to include a random modulation in the signal phase, which is attributable to the influence of the largest, most energetic inhomogeneities in the propagation medium. Various joint and marginal distributions for the complex signal statistics are derived to incorporate the phase-modulation effect. Approximations of the phase-modulated Rice model involving the Nakagami distribution for amplitude, and the wrapped normal and von Mises distributions for phase, are also developed and analyzed. The phase-modulated Rice model and various approximations are shown to greatly improve agreement with simulated data for sound propagation in the near-ground atmosphere.
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Helgeson, Jennifer F., Juan F. Fung, Alfredo R. Roa Henriquez, Ariela Zycherman, Claudia Nierenberg, David T. Butry, Donna Ramkissoon e Yating Zhang. Longitudinal Study of Complex Event Resilience of Small- and Medium-Sized Enterprises: Natural Disaster Planning and Recovery During the COVID-19 Pandemic (Wave 2). National Institute of Standards and Technology, maggio 2021. http://dx.doi.org/10.6028/nist.sp.1267.

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Baliki, Ghassan, Dorothee Weiffen, Melodie Al Daccache, Aysegül Kayaoglu, Lara Sujud, Hadi Jaafar, Hala Ghattas e Tilman Brück. Seeds for recovery: The long-term impacts of a complex agricultural intervention on welfare, behaviour and stability in Syria (SEEDS). Centre for Excellence and Development Impact and Learning (CEDIL), aprile 2023. http://dx.doi.org/10.51744/crpp7.

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There is scarce evidence on whether and how assistance in humanitarian emergencies and conflict settings impacts household well-being and behaviour. Conducting rigorous impact evaluations in such settings poses multiple challenges in design and data collection. In SEEDS, we evaluate the impact of a complex large-scale multi-arm agricultural intervention on productivity, food security, and resilience in the context of an on-going humanitarian crisis in Syria. Specifically, we identify the causal impacts of agricultural asset transfers over various time horizons (the short-, medium-, and long-run), and across different conditions and subgroups (gender and conflict intensity) at the household-level. We evaluate the effectiveness of irrigation rehabilitation separately at the community-level. We use and combine various data sources, including a unique survey panel dataset collected over a period of four years from multiple governorates in Syria, satellite remote-sensing data, and publicly available violent conflict incidence and weather data. Our findings from using cutting-edge machine and deep learning approaches together with innovative balancing and analytical methods can be summarised as follows: For average treatment effects at the household-level, we find that the provision of agricultural asset support leads to significant improvements in food security in the short- and long-term, three years after the intervention. The positive and significant effect on food security is driven mainly by the increased consumption of healthy food items such as vegetables. In the long-run, livestock support reduces the use of harmful coping strategies households employ to deal with food shortages. Interestingly, we find that households who received vegetable kits are not just less likely to sell their productive assets in the long-term but also are less likely to marry off their young daughters or send their children to work. Overall, we find that both agricultural and livestock asset support is key to improving households’ resilience in the long-term. The irrigation rehabilitation interventions at the community-level positively affected agricultural productivity compared to the pre-intervention and pre-conflict periods. However, these effects were only significantly pronounced in the spring season. As for the heterogeneity analysis, we find that female-headed households benefit remarkably more in terms of food security in the medium-term compared to male-headed families. Moreover, households residing in areas that are moderately affected by violent conflict show stronger food security improvements compared to households from peaceful or conflict-intense settings. Overall, we draw three overarching lessons from our findings in SEEDS: First, agricultural support in protracted conflict settings effectively improves the long-term welfare and resilience of vulnerable households. In fact, the presence of an ongoing humanitarian operation acts as a social safety net if circumstances deteriorate suddenly. Second, not all interventions are equally effective, and not all households equally benefit, underscoring the need to design and implement inclusive context-specific interventions with detailed targeting. Third, methodologically, using multiple remote data sources and machine learning methods help overcome challenges in conducting rigorous impact evaluations in hard-to-reach humanitarian emergency settings.
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Puttanapong, Nattapong, Arturo M. Martinez Jr, Mildred Addawe, Joseph Bulan, Ron Lester Durante e Marymell Martillan. Predicting Poverty Using Geospatial Data in Thailand. Asian Development Bank, dicembre 2020. http://dx.doi.org/10.22617/wps200434-2.

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This study examines an alternative approach in estimating poverty by investigating whether readily available geospatial data can accurately predict the spatial distribution of poverty in Thailand. It also compares the predictive performance of various econometric and machine learning methods such as generalized least squares, neural network, random forest, and support vector regression. Results suggest that intensity of night lights and other variables that approximate population density are highly associated with the proportion of population living in poverty. The random forest technique yielded the highest level of prediction accuracy among the methods considered, perhaps due to its capability to fit complex association structures even with small and medium-sized datasets.
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