Relevant bibliographies by topics / Field of two elements

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  2. Dissertations / Theses
  3. Books
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Academic literature on the topic 'Field of two elements'

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Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Field of two elements"

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Judd, B. R. "Quasi-spin for two-electron crystal-field matrix elements." Journal of Physics C: Solid State Physics 20, no. 32 (November 20, 1987): L903—L906. http://dx.doi.org/10.1088/0022-3719/20/32/005.

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De Seguins Pazzis, Clément. "Range-compatible homomorphisms over the field with two elements." Electronic Journal of Linear Algebra 34 (February 21, 2018): 71–114. http://dx.doi.org/10.13001/1081-3810.2982.

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Let U and V be finite-dimensional vector spaces over a field K, and S be a linear subspace of the space L(U, V ) of all linear operators from U to V. A map F : S → V is called range-compatible when F(s) ∈ Im s for all s ∈ S. Previous work has classified all the range-compatible group homomorphisms provided that codimL(U,V )S ≤ 2 dim V − 3, except in the special case when K has only two elements and codimL(U,V )S = 2 dim V − 3. This article gives a thorough treatment of that special case. The results are partly based upon the recent classification of vector spaces of matrices with rank at most 2 over F2. As an application, the 2-dimensional non-reflexive operator spaces are classified over any field, and so do the affine subspaces of Mn,p(K) with lower-rank at least 2 and codimension 3.
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Kawahito, S., S. O. Choi, M. Ishida, and T. Nakamura. "Micromachined hall elements for two-dimensional magnetic-field sensing." Sensors and Actuators A: Physical 40, no. 2 (February 1994): 141–46. http://dx.doi.org/10.1016/0924-4247(94)85020-8.

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Wannamaker, Philip E., John A. Stodt, and Luis Rijo. "Two‐dimensional topographic responses in magnetotellurics modeled using finite elements." GEOPHYSICS 51, no. 11 (November 1986): 2131–44. http://dx.doi.org/10.1190/1.1442065.

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We simulate the magnetotelluric response to two‐dimensional earth topography using finite elements. Linear interpolation of the secondary field parallel to strike over triangular elements allows accurate modeling of inclined resistivity boundaries, including topographic surfaces. To avoid discontinuities in field derivatives or resistivity, care must be taken that the nodal values of the field parallal to strike used to obtain the auxiliary secondary fields are kept within uniform earth media. The nodal locations may be shifted, but the derivatives still are evaluated at the field points of interest. Correct values may be returned at gentle breaks in slope as well as along straight surfaces. The finite‐element program is verified by comparison with the analytic transverse magnetic response of a hemicylindrical depression and with Rayleigh scattering and transmission surface results for transverse electric and transverse magnetic polarization. Agreement with the other methods generally is excellent, with the exception of some results of the transmission surface technique (especially the transverse magnetic mode). A result presented shows that placing the H-field sensors horizontally reduces topographic anomalies compared to locating sensors parallel to the slope. Moreover, if earth resistivity increases with elevation, the apparent resistivity is relatively nonanomalous near the base of the topography.
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Knabe, Władyslaw, JarosWław Przewłócki, and Grzegorz Róźyński. "Spatial averages for linear elements for two-parameter random field." Probabilistic Engineering Mechanics 13, no. 3 (July 1998): 147–67. http://dx.doi.org/10.1016/s0266-8920(97)00015-5.

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Judd, B. R., and L. Zing. "Two-electron crystal-field matrix elements for half-filled shells." Journal of Physics C: Solid State Physics 21, no. 22 (August 10, 1988): 4071–81. http://dx.doi.org/10.1088/0022-3719/21/22/020.

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Hubrig, S., S. P. Järvinen, H. Korhonen, I. Ilyin, M. Schöller, E. Niemczura, and S. D. Chojnowski. "Detection of weak magnetic fields in two HgMn stars." Monthly Notices of the Royal Astronomical Society: Letters 495, no. 1 (April 16, 2020): L97—L101. http://dx.doi.org/10.1093/mnrasl/slaa064.

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ABSTRACT The main-sequence mercury–manganese (HgMn) stars are known to exhibit large overabundances of exotic elements and, similar to magnetic Ap/Bp stars, are spectrum variables, implying the presence of an inhomogeneous element distribution over the stellar surface. A number of magnetic field studies have been attempted in the last decades, indicating that magnetic fields in HgMn stars, if they exist, should be rather weak. The presence of tangled magnetic fields was suggested by several authors who detected quadratic magnetic fields using the moment technique. We employ the least-squares deconvolution technique to carry out a sensitive search for weak magnetic fields in spectropolarimetric observations of three HgMn stars, HD 221507, HD 65949, and HD 101189, which have different fundamental parameters and spectral characteristics. A definite weak longitudinal field is discovered in HD 221507 and HD 65949 on single epochs, while only marginal field detections were achieved for HD 101189. The new measurements indicate that the structure of the magnetic fields is probably rather complex: our analysis reveals the presence of reversed Stokes V profiles at the same observational epoch if individual elements are used in the measurements. This is the first observational evidence that individual elements sample distinct local magnetic fields of different polarity across the stellar surface.
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Jokinen, Eric P., and Andrew Scanlon. "Field measured two-way slab deflections." Canadian Journal of Civil Engineering 14, no. 6 (December 1, 1987): 807–19. http://dx.doi.org/10.1139/l87-119.

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Results of a survey of two-way slab deflections both during and after construction of a 28-storey office tower are presented. A comparison is made between measured deflections and deflections computed using a finite element program that includes the effects of cracking. Effects of construction loading and time-dependent deformations are included in the calculations. The measured and calculated deflections illustrate the high variability that can be expected in two-way slab deflections. Key words: concrete construction, deflection, finite elements, loads, multistorey construction, two-way slabs, variability.
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de Seguins Pazzis, Clément. "Primitive spaces of matrices with upper rank two over the field with two elements." Linear and Multilinear Algebra 64, no. 7 (September 11, 2015): 1321–53. http://dx.doi.org/10.1080/03081087.2015.1083526.

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Herrera-Fernandez, Jose Maria, Luis Miguel Sanchez-Brea, and Eusebio Bernabeu. "Near-field shaping with two binary diffractive optical elements in tandem." Optics Communications 297 (June 2013): 182–89. http://dx.doi.org/10.1016/j.optcom.2013.01.059.

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Dissertations / Theses on the topic "Field of two elements"

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Collings, Peter. "Fixed point free involutions over a field of characteristic two and other actions of the symmetric group by conjugation on its own elements." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426375.

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Grout, Jason Nicholas. "The Minimum Rank Problem Over Finite Fields." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1995.pdf.

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KANTHA, SAMY MADHAN KUMAR. "FIELD TEST AND ANALYSIS OF TWO PRESTRESSED CONCRETE BRIDGES AFTER DECK REPLACEMENT WITH FRP PANELS." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1187271654.

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Meléndez, Gimeno Carlos. "A finite element-based approach for the analysis and design of 3D reinforced concrete elements and its applications to D-regions." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/86193.

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The finite element method is a powerful analysis tool which has facilitated a better understanding of the behaviour of reinforced concrete structures. Its use in the research field is widespread and complements experimental tests and the development of new analytical models. Its application in practice engineering has permitted to deal with complex elements. However, the general structural engineer is still reluctant to consider finite element modelling for his work as he finds most of these models excessively sophisticated for his needs and knowledge. In particular, complexity of many finite element tools usually derives from the adoption of advanced concrete constitutive models. Implementation of more simple models based on engineering practice could facilitate its use by less experienced finite element users. In structural engineering practice finite element analysis can be of great usefulness to deal with those more problematic elements and/or where the application of traditional analysis methods presents limitations. This includes the so-called D-regions with a 3D behaviour. The strut-and-tie method and the stress field method are consistent and rational tools for the analysis and design of D-regions, but while their application to 2D elements is well covered in literature, its extension to 3D is problematic. This generally explains why excessively conservative assumptions are still common in the design of these elements. Refinement of current analytical and design approaches or the use of finite element analysis could lead to more rational solutions which in turn will reduce material requirements and costs. A 3D nonlinear finite element-based tool was developed in this thesis oriented towards the analysis and design of 3D D-regions by less experienced finite element users. Regarding material modelling, an orthotropic concrete model was adopted to permit the use of uniaxial stress-strain relationships. Only one single parameter, the uniaxial compressive strength of concrete, needs to be defined. Additionally, several aid functions were implemented, among which the following can be highlighted: a comprehensive, embedded reinforcement model to facilitate the introduction of complex rebar geometries; special support and load elements permitting an integrated and simple treatment of the boundary conditions imposed by them; and a simple design algorithm for the automatic determination of the required rebar areas. Three examples of applications to representative 3D D-regions are presented to show the capabilities of the tool. In particular, the analyses of fourteen four-pile caps, three socket base column-to-foundations connections and one anchorage block are described in the third part of the thesis. Results prove that realistic response predictions can be obtained considering relatively simple constitutive models. The capacity of the tool to configure consistent stress field models depending on the reinforcement arrangement is also demonstrated. The generation of rational reinforcement configurations by applying the implemented design algorithm is also shown. A strut-and-tie-based method for the analysis and design of four-pile caps with rectangular geometries is proposed in the fourth part. The method is based on a refined 3D strut-and-tie model and the consideration of three potential modes of failure: exceeding the reinforcement strength, crushing of the diagonal strut at the base of the column with narrowing of the strut and splitting of the diagonal strut due to transverse cracking. The main innovation is that the strut inclination is not fixed as in current strut-and-tie-based design procedures, but determined by maximizing the pile cap strength. The method accounts for strength softening of cracked concrete, compatibility constraints and reinforcement details. Its application to 162 specimens of literature led to very good predictions of the ultimate strength and, to a lesser extent, of the mode of failure.
El método de los elementos finitos es una potente herramienta de análisis que ha facilitado un mejor conocimiento del comportamiento de las estructuras de hormigón armado. Su uso en el ámbito de la investigación está ampliamente extendido. Su aplicación en la práctica ingenieril ha permitido la resolución de elementos complejos. Sin embargo, el ingeniero estructural común todavía es reticente a usar la modelización por elementos finitos ya que considera que la mayoría de estos modelos son excesivamente sofisticados para sus necesidades. La complejidad de muchas herramientas de elementos finitos suele derivarse de la adopción de modelos constitutivos de hormigón avanzados. La implementación de modelos más sencillos podría facilitar su uso por usuarios menos experimentados. En la práctica ingenieril el análisis con elementos finitos puede ser de gran utilidad para tratar aquellos elementos más problemáticos y/o donde la aplicación de los métodos de análisis tradicionales presenta limitaciones. Esto incluye las llamadas regiones D con comportamiento 3D. El método de bielas y tirantes y el método de campos de tensiones son herramientas racionales para el análisis y dimensionamiento de regiones D, pero su extensión a 3D es problemática. Este hecho explica por qué se adoptan todavía hipótesis excesivamente conservadoras en el dimensionamiento de estos elementos. La propuesta de métodos analíticos y de diseño más adecuados o la modelización con elementos finitos podría conducir a soluciones más racionales, lo que a su vez reduciría las necesidades de material y los costes. Como parte de esta tesis se ha desarrollado una herramienta de cálculo no lineal basada en el método de los elementos finitos orientada al análisis y dimensionamiento de regiones D tridimensionales por usuarios con menos experiencia en la modelización con elementos finitos. Se ha adoptado un modelo ortotrópico para el hormigón para permitir el uso de relaciones uniaxiales de tensión-deformación. Sólo es necesario definir un único parámetro, la resistencia a compresión uniaxial del hormigón. Adicionalmente, se han implementado varias funciones de ayuda, entre las que destacan: un modelo de armadura embebida para facilitar la introducción de geometrías de armado complejas; elementos especiales de apoyo y de carga que permiten un tratamiento integral de las condiciones de contorno; y un algoritmo de diseño para la determinación automática del área de armado necesaria. Se presentan tres ejemplos de aplicación a regiones D 3D representativas para mostrar las capacidades de la herramienta. En concreto, en la tercera parte del documento se describen los análisis de catorce encepados, tres cálices de cimentación y un bloque de anclaje. Los resultados muestran que se pueden obtener predicciones bastante realistas considerando modelos constitutivos relativamente sencillos. También se demuestra la capacidad de la herramienta para configurar modelos de campo de tensiones consistentes dependiendo de la configuración de armado. Además se muestra la capacidad del algoritmo de diseño para configurar disposiciones de armado racionales. En la cuarta parte se propone un método para el análisis y dimensionamiento de encepados sobre cuatro pilotes con geometría rectangular. El método se basa en un modelo 3D de bielas y tirantes refinado y la consideración de tres modos de fallo posibles: rotura del acero, aplastamiento de la biela diagonal en la base de la columna con estrechamiento de la misma y splitting de la biela diagonal debido a la fisuración transversal. La principal novedad es que el ángulo de la biela no se fija como en otros modelos, sino que se determina mediante la maximización de la resistencia del encepado. El método considera el debilitamiento de la resistencia del hormigón fisurado, condiciones de compatibilidad de deformaciones y detalles de armado. Su aplicación a 162 especímenes dio luga
El mètode dels elements finits és una potent eina d'anàlisi que ha facilitat un millor coneixement del comportament de les estructures de formigó armat. El seu ús en l'àmbit de la investigació està àmpliament estès. La seua aplicació en la pràctica enginyeril ha permès la resolució d'elements més complexos. No obstant això, l'enginyer estructural comú encara és reticent a fer servir la modelització per elements finits ja que considera que la majoria d'aquests models són excessivament sofisticats per a les seues necessitats i el seu conèixement. En concret, la complexitat de moltes eines d'elements finits sol derivar-se de l'adopció de models constitutius avançats de formigó. La implementació de models més senzills basats en la pràctica enginyeril podria facilitar el seu ús per a usuaris menys experimentats en la modelització amb elements finits. A la pràctica enginyeril l'anàlisi amb elements finits pot ser de gran utilitat per a tractar aquells elements més problemàtics i/o on l'aplicació dels mètodes d'anàlisi tradicionals presenta limitacions. Això inclou les anomenades regions D amb comportament 3D. El mètode de bieles i tirants i el mètode de camps de tensions són eines racionals per a l'anàlisi i dimensionament de regions D, però la seua extensió a 3D és problemàtica. Aquest fet explica per què s'adopten encara hipòtesis excessivament conservadores en el dimensionament d'aquests elements. La proposta de mètodes analítics i de disseny més adequats o la modelització amb elements finits podria conduir a solucions més racionals, amb el que també es reduirien les necessitats de material i els costos. Com a part d'aquesta tesi s'ha desenvolupat una eina de càlcul no lineal basada en el mètode dels elements finits orientada a l'anàlisi i dimensionament de regions D tridimensionals per a usuaris amb menys experiència en la modelització amb elements finits. S'ha adoptat un model ortotròpic per al formigó per permetre l'ús de relacions uniaxials de tensió-deformació. Només cal definir un únic paràmetre, la resistència a compressió uniaxial del formigó. Addicionalment, s'han implementat diverses funcions d'ajuda, entre les quals destaquen: un model d'armadura embeguda per facilitar la introducció de geometries d'armat complexes; elements especials de suport i de càrrega que permeten un tractament integral i senzill de les condicions de contorn; i un algoritme de disseny per a la determinació automàtica de l'àrea d'armat necessari. Es presenten tres exemples d'aplicació a regions D 3D representatives per mostrar les capacitats de l'eina. En particular, en la tercera part del document es descriuen les anàlisis de catorze enceps sobre quatre pilons, 3 calzes de fonamentació i un bloc d'ancoratge. Els resultats mostren que es poden obtenir prediccions prou realistes considerant models constitutius relativament senzills. També es demostra la capacitat de l'eina per configurar models de camp de tensions consistents depenent de la configuració d'armat. A més es mostra la capacitat de l'algoritme de disseny per configurar disposicions d'armat racionals. En la quarta part es proposa un mètode per a l'anàlisi i dimensionament d'enceps sobre quatre pilons amb geometria rectangular. El mètode es basa en un model 3D de bieles i tirants refinat i la consideració de tres modes de fallada possibles: trencament de l'acer, aixafament de la biela diagonal a la base de la columna amb estrenyiment de la mateixa i splitting de la biela diagonal per causa de la fissuració transversal. La principal novetat és que l'angle de la biela no es fixa com en els models actuals de bieles i tirants, sinó que es determina mitjan\c{c}ant la maximització de la resistència de l'encep. El mètode proposat considera el debilitament de la resistència del formigó fissurat, condicions de compatibilitat de deformacions i detalls d'armat. La seua aplicació a 162 espècimens de la liter
Meléndez Gimeno, C. (2017). A finite element-based approach for the analysis and design of 3D reinforced concrete elements and its applications to D-regions [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/86193
TESIS
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Najjar, Mohamad. "Machine analysis : being a study of the application of the finite element method for solving the two-dimensional field of the single-phase shaded-pole induction motor." Thesis, University of Strathclyde, 1985. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21461.

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This thesis contains eight chapters, dealing with machine analysis and representation. A definition and a brief survey of previous investigation devoted to shaded-pole motors and the application of finite element method for solving the two-dimensional electromagnetic field is given in Chapter 1. An outline of the present investigation is also given. In Chapter 2, the experimental requirements and details of the equipment are given. This includes the techniques of recording the transient torque patterns and the method of measuring the complete torque-speed characteristics. The experimental methods for parameters determination are also mentioned. The finite element method is outlined in Chapter 3. This chapter deals also with the assumptions made, the formulation of the non-linear energy function, the solution of Poisson's equation and an example of a simple shape contianing 16 elements for illustrating the method. In Chapter 4, the computer program for the finite element is outlined. The iteration process and the numerical representation of the magnetization curve are mentioned. Application of the finite element method to the shaded-pole motor is also given. Calculation of parameters by finite element technique is given in Chapter 5. Self inductance is calculated using the concept of stored energy and the results of self and mutual inductances are tabulated. Basic performance equations of an electrical machine are derived in Chapter 6. Solution of the basic performance equations, by a step-by-step numerical method, is also given. In Chapter 7, the steady state performance equations are established in terms of harmonic currents and inductance coefficients. The flux linkages are evaluated by the approximated functions of mutual inductances. The electromagnetic torque is calculated from the stored energy in the magentic field. General conclusions and suggestion for further work are mentioned in Chapter 8.
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Pimenta, Paulo Vicente de Cassia Lima. "Thermomechanical simulation of continuous casting process using element based finite-volume method." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13684.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior
The continuous casting technique in the last four decades has been large used for to production of semi-finished steel. The heat transfer is major mechanism and it occurs in various steps during the continuous casting. The quality of steel is directly related to the way the heat transfer occur because the thermal variations produce mechanical loads as well as contact forces which are generated through the rollers and shake of the mold. Such factors may cause defects such as fractures or cracks in the final product if the resulting stresses and strains exceed critical values. The technique must be improved in order to reduce the appearance of defects and the production time. For this a good understanding of physical phenomena involved during the solidification process is critical. The focus of this work is to apply the EbFVM (Element based Finite-Volume Method) approach to study the effects of linear tensions unidirectionally coupled with the temperature applied to continuous casting of the steel 1013D (0,3% of carbon) In the simulations we adopted some simplifications such as the Plane Strain and isotropic material. We also neglected the body forces contact with the rollers the liquid pressure on the walls of the steel ingot (ferrostatic pressure) and the convective effect. However despite of the simplifications adopted this work provides quantitative informations on the linear tensions accumulation that point out to areas of possible of cracks formations
A tÃcnica de lingotamento contÃnuo nas Ãltimas quatro dÃcadas à cada vez mais utilizada na produÃÃo de aÃo semiacabado. A transferÃncia de calor à o principal mecanismo dominante e ocorre em todas as etapas do processo. A qualidade do aÃo no lingotamento està diretamente relacionada à forma que ocorrem as trocas de calor pois as variaÃÃes tÃrmicas produzem carregamentos mecÃnicos assim como as forÃas de contato as quais sÃo geradas por intermÃdio dos rolos e da oscilaÃÃo do molde. Tais fatores podem causar defeitos como fraturas ou trincas no produto final caso as tensÃes e deformaÃÃes resultantes excedam valores crÃticos. O aprimoramento da tÃcnica tem a finalidade de evitar o surgimento de defeitos e reduzir o tempo de produÃÃo. Para isso à fundamental uma boa compreensÃo dos fenÃmenos fÃsicos envolvidos ao longo do processo de solidificaÃÃo. O foco deste trabalho à aplicar a abordagem do EbFVM (Element based Finite-Volume Method) no estudo dos efeitos das tensÃes lineares acopladas unidirecionalmente com a temperatura aplicado ao lingotamento contÃnuo do aÃo 1013D (0,3% de carbono) Nas simulaÃÃes adotou-se algumas simplificaÃÃes com o estado plano de tensÃes e isotropia do material. Descartando-se as forÃas de corpo o contato com os rolos a pressÃo do aÃo lÃquido nas paredes do lingote (pressÃo ferrostÃtica) e o efeito convectivo. Contudo apesar das simplificaÃÃes adotadas este trabalho traz informaÃÃes quantitativas quanto a formaÃÃo do acÃmulo das tensÃes lineares que apontam para regiÃes de possÃveis formaÃÃes de trincas
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Kronbichler, Martin. "Computational Techniques for Coupled Flow-Transport Problems." Doctoral thesis, Uppsala universitet, Avdelningen för teknisk databehandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-162215.

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This thesis presents numerical techniques for solving problems of incompressible flow coupled to scalar transport equations using finite element discretizations in space. The two applications considered in this thesis are multi-phase flow, modeled by level set or phase field methods, and planetary mantle convection based on the Boussinesq approximation. A systematic numerical study of approximation errors in evaluating the surface tension in finite element models for two-phase flow is presented. Forces constructed from a gradient in the same discrete function space as used for the pressure are shown to give the best performance. Moreover, two approaches for introducing contact line dynamics into level set methods are proposed. Firstly, a multiscale approach extracts a slip velocity from a micro simulation based on the phase field method and imposes it as a boundary condition in the macro model. This multiscale method is shown to provide an efficient model for the simulation of contact-line driven flow. The second approach combines a level set method based on a smoothed color function with a the phase field method in different parts of the domain. Away from contact lines, the additional information in phase field models is not necessary and it is disabled from the equations by a switch function. An in-depth convergence study is performed in order to quantify the benefits from this combination. Also, the resulting hybrid method is shown to satisfy an a priori energy estimate. For the simulation of mantle convection, an implementation framework based on modern finite element and solver packages is presented. The framework is capable of running on today's large computing clusters with thousands of processors. All parts in the solution chain, from mesh adaptation over assembly to the solution of linear systems, are done in a fully distributed way. These tools are used for a parallel solver that combines higher order time and space discretizations. For treating the convection-dominated temperature equation, an advanced stabilization technique based on an artificial viscosity is used. For more efficient evaluation of finite element operators in iterative methods, a matrix-free implementation built on cell-based quadrature is proposed. We obtain remarkable speedups over sparse matrix-vector products for many finite elements which are of practical interest. Our approach is particularly efficient for systems of differential equations.
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Koslosky, Barrow Arthur. "4 Elements of Deer Field Inn." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/32494.

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Architectural orientation of wood surfaces is the primary study of this thesis. To understand different wood surfaces, they are ordered into 4 elements of Architecture; Earth, Air, Fire, Water. This thesis is structured from these 4 elements in a simple legible form. Deer Field Inn would serve the local communities of Ritchie County, West Virginia for family, social, and organization gatherings.
Master of Architecture
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Brawner, Henry P. "Elements in the field of an airport." Thesis, Virginia Polytechnic Institute and State University, 1995. http://hdl.handle.net/10919/56202.

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Raveau, Robin. "Contribution au développement d’une filière éco-innovante de phytomanagement de sols pollués par les éléments traces : culture de plantes aromatiques et production d’huiles essentielles The Aromatic Plant Clary Sage Shaped Bacterial Communities in the Roots and in the Trace Element-Contaminated Soil More Than Mycorrhizal Inoculation – A Two-Year Monitoring Field Trial." Thesis, Littoral, 2020. http://www.theses.fr/2020DUNK0580.

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Le phytomanagement compte parmi les méthodes innovantes de gestion des sites et sols pollués en raison de son adéquation avec le développement durable. Pour répondre à la double exigence de performances environnementales et économiques, les phytotechnologies sont désormais combinées à la valorisation de la biomasse produite sur sols pollués. Parmi les filières éco-innovantes et non-alimentaires de valorisation de cette biomasse, la culture de plantes à parfums, aromatiques et médicinales (PPAM) pour la production d’huiles essentielles (HE), substances biosourcées à haute valeur ajoutée, a été proposée dans le cadre du projet PhytEO, financé par l’ADEME. Ainsi, ma contribution à ce projet a permis d‘évaluer la pertinence d’un mode de gestion reposant sur la culture de la sauge sclarée et de la coriandre, en présence ou non d’un amendement mycorhizien, en s’appuyant sur des démonstrateurs in situ à l’échelle de l’hectare, parcelles historiquement polluées ou non par les éléments traces (ET). La coriandre ainsi que la sauge sclarée ont toutes deux montré une bonne capacité à s’installer, à se développer et à produire une quantité importante de biomasse sur des sols présentant une forte pollution historique par les ET. Bien que l’ajout d’un amendement biologique à base de champignons mycorhiziens à arbuscules ait permis d’augmenter de façon significative les taux de mycorhization des racines de coriandre et de sauge sclarée, aucun gain n’a été observé ni au niveau de la croissance de ces deux PPAM, ni au niveau de la quantité et de la qualité des HE. Un effet positif en termes d’immobilisation des ET dans le sol, en particulier du Pb, et une réduction des transferts des ET (Cd et Pb) dans les parties aériennes a toutefois été montré chez la sauge sclarée. D’autre part, les HE distillées à partir de la biomasse de sauge sclarée (inflorescences) ou de coriandre (parties aériennes ou graines) cultivées sur sols pollués présentent une qualité très satisfaisante, caractérisée par leur non contamination en ET ou en résidus de pesticides (traces). Leurs compositions chimiques, non altérées par la pollution en ET et l’inoculation mycorhizienne, affichent divers principes actifs dont le linalol, l’acétate de linalyle, le germacrène, l’α-pinène, le γ-terpinène, le 2-décénal, le décanal et le 2-dodécénal. Ainsi, plusieurs propriétés biologiques potentiellement valorisables dans des domaines à vocation non-alimentaire, tels que la protection des cultures (effets fongistatiques, anti-germinatifs et herbicides) ou la santé humaine (effets anti-inflammatoires et antioxydants) ont été mises en évidence. En revanche, en dépit de son fort pouvoir complexant des HE, la β-cyclodextrine n’a montré aucun effet positif sur les propriétés biologiques testées. Par ailleurs, la végétalisation du sol pollué par la sauge sclarée permet une modulation de la structure des communautés bactériennes et fongiques, telluriques et racinaires. Enfin, l’ensemble des résultats de cette étude et de l’analyse technico-économique de la filière PPAM-HE soulignent le haut potentiel de la sauge sclarée dans une démarche de phytomanagement de sols pollués par les ET
To cope with the soil trace element (TE) pollution, phytomanagement was brought forward as an eco-friendly and feasible approach. To meet the dual requirements of environmental and economic performances, phytotechnologies are now combined with the valorisarion of biomass produced on polluted soils. Among the eco-innovative channels intended for the non-food valorisation of the produced biomass, the cultivation of aromatic and medicinal plants producing essential oils (EO), high-added value biosourced products, has been suggested within the framework of PhytEO project, funded by ADEME. Thus, this thesis contributed to evaluate the relevance of a management approach based on clary sage and coriander cultivation, combined or not with a mycorrhizal inoculum, on in situ experimental plots polluted or not with TE. Both clary sage and coriander have shown a good ability to settle in, to grow and to produce high amounts of biomass, despite the presence of high TE concentrations in the soil. The addition of an amendment based on arbuscular mycorrhizal fungi enhanced the mycorrhizal colonisation rates of both coriander and clary sage roots. However, no significant improvement was observed in terms of plants’ growth, EO amounts and quality. Moreover, mycorrhizal inoculation allowed TE immobilisation in soils, in particular Pb, and reduced TE (Cd and Pb) transfers in aerial parts of clary sage. Besides, the EO distilled from clary sage inflorescences and coriander (aerial parts orseeds) grown on TE polluted soils, displayed a highly satisfactory quality, regarding the absence of contamination by TE or pesticide residues (trace amounts). Their chemical compositions were not altered by both TE pollution and mycorrhizal inoculation and were characterized by several active principles, such as linalool, linalyl acetate, germacrene, α-pinene, γ-terpinene, 2-decenal, decanal and 2-dodecenal. Furthermore, several biological properties with potential applications in non-food fields such as crop protection (antifungal, antigerminative and herbicidal) or human healthcare (antioxidant and anti-inflammatory) have been brought forward. However, despite its ability to form inclusion complexes with EO components, β-cyclodextrin has shown no significant improvement of the tested EO biological activities. On another note, the soil revegetation with clary sage displayed a clear shaping of the bacterial and fungal communities, in both the rhizospheric soil and the roots of the aromatic plant species. Altogether, our results combined with the techno-economic feasibility assessment of the channel “aromatic and medicinal plants/EO” have emphasised clary sage as a good candidate for the phytomanagement of TE-polluted soils
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Books on the topic "Field of two elements"

1

Ihnat, M. Concentrations and variability of major, minor and trace elements in soils and crops from two Humic gleysol fields in southeastern Ontario, Canada. Ottawa, Ont: Research Branch, Agriculture and Agri-Food Canada, 1996.

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Graglia, Roberto D., Giuseppe Pelosi, and Stefano Selleri, eds. International Workshop on Finite Elements for Microwave Engineering. Florence: Firenze University Press, 2016. http://dx.doi.org/10.36253/978-88-6655-968-9.

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When Courant prepared the text of his 1942 address to the American Mathematical Society for publication, he added a two-page Appendix to illustrate how the variational methods first described by Lord Rayleigh could be put to wider use in potential theory. Choosing piecewise-linear approximants on a set of triangles which he called elements, he dashed off a couple of two-dimensional examples and the finite element method was born. … Finite element activity in electrical engineering began in earnest about 1968-1969. A paper on waveguide analysis was published in Alta Frequenza in early 1969, giving the details of a finite element formulation of the classical hollow waveguide problem. It was followed by a rapid succession of papers on magnetic fields in saturable materials, dielectric loaded waveguides, and other well-known boundary value problems of electromagnetics. … In the decade of the eighties, finite element methods spread quickly. In several technical areas, they assumed a dominant role in field problems. P.P. Silvester, San Miniato (PI), Italy, 1992 Early in the nineties the International Workshop on Finite Elements for Microwave Engineering started. This volume contains the history of the Workshop and the Proceedings of the 13th edition, Florence (Italy), 2016 . The 14th Workshop will be in Cartagena (Colombia), 2018.
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Christopher, Nicholas. Atomic Field: Two poems. New York: Harcourt, 2000.

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Smith, Robert Leo. Elements of ecology. 3rd ed. New York: HarperCollins, 1991.

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Brock, Darryl. Two in the field: A novel. Berkeley, Calif: Frog, 2007.

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Two in the field: A novel. New York: Plume, 2002.

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Ann, Chowning, ed. Two-party line: Conversations in the field. Lanham: Rowman & Littlefield, 1996.

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Dyni, Robert C. Field demonstration of two pneumatic backfilling technologies. [Washington, D.C.?]: U.S. Dept. of the Interior, Bureau of Mines, 1995.

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The two state universe. Boston, MA: Branden Pub. Co., 1988.

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Two oilfield water systems. Malabar, Fla: R.E. Krieger Pub. Co., 1987.

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Book chapters on the topic "Field of two elements"

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Gubareni, Nadiya. "Elements of Field Theory." In Introduction to Modern Algebra and its Applications, 159–79. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003015482-6.

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Papachristou, Costas J. "Elements of Field Theory." In Introduction to Electromagnetic Theory and the Physics of Conducting Solids, 65–77. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30996-1_4.

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Monastyrsky, Michael. "Elements of topology. How two given manifolds can be differentiated." In Topology of Gauge Fields and Condensed Matter, 78–175. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-2403-2_2.

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Wang, Zhuoran, and Jiangguo Liu. "deal.II Implementation of a Two-Field Finite Element Solver for Poroelasticity." In Lecture Notes in Computer Science, 88–101. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-50436-6_7.

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Harper, Graham, Jiangguo Liu, Simon Tavener, and Zhuoran Wang. "A Two-Field Finite Element Solver for Poroelasticity on Quadrilateral Meshes." In Lecture Notes in Computer Science, 76–88. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93713-7_6.

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Qiu, Xiao-hui, Li-li Zhou, Yang yang, and Xiao-jian Wang. "Finite Element Analysis of Dynamics of Two Microbubbles Under Ultrasonic Field." In IFMBE Proceedings, 1747–49. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19387-8_424.

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De Gersem, Herbert, Stefan Vandewalle, and Kay Hameyer. "A Finite-Element/Equivalent-Circuit Two-Level Method for Magnetic Field Simulations." In Lecture Notes in Computational Science and Engineering, 73–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-58312-4_9.

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Grinberg, Eric L. "The Admissibility Theorem for the Spatial X-Ray Transform over the Two-Element Field." In The Mathematical Legacy of Leon Ehrenpreis, 111–23. Milano: Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-1947-8_8.

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Nguyen, C. V., and J. Rungamornrat. "Scaled Boundary Finite Element Method for Two-Dimensional Crack Problems in Multi-field Media." In Lecture Notes in Civil Engineering, 1243–55. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8079-6_117.

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Rogers, Suzanne, and Jo White. "Animal welfare: the human element." In Changing human behaviour to enhance animal welfare, 20–34. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789247237.0002.

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Abstract This chapter explores the different elements of human behaviour change and illustrates why there is an increasing emphasis in the animal welfare field on learning about human and animal behaviour.
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Conference papers on the topic "Field of two elements"

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Lin, C. J. David, and William Detmold. "Aspects of twist-two matrix elements." In XXIIIrd International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2005. http://dx.doi.org/10.22323/1.020.0361.

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Baroni, Alessandro, Raúl A. Briceño, Maxwell T. Hansen, and Felipe G. Ortega-Gama. "Finite volume matrix elements of two-body states." In The 36th Annual International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.334.0075.

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De Freitas, Abilio, Jakob Ablinger, Arnd Behring, Johannes Bluemlein, G. Falcioni, A. Hasselhuhn, Andreas von Manteuffel, M. Round, Carsten Schneider, and F. Wissbrock. "Calculation of 3-loop operator matrix elements with two masses." In Loops and Legs in Quantum Field Theory. Trieste, Italy: Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.260.0065.

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De Freitas, Abilio, Johannes Bluemlein, and Wilhelmus van Neerven. "Two-Loop QED Operator Matrix Elements with a Massive External Fermion Line." In 10th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology). Trieste, Italy: Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.145.0033.

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Yamazaki, Takeshi. "Calculation of Delta I = 3/2 kaon weak matrix elements including two-pion interaction effects in finite volume." In XXIVth International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2006. http://dx.doi.org/10.22323/1.032.0100.

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Noguchi, So, Takuto Naoe, Hajime Igarashi, Shinya Matsutomo, Vlatko Cingoski, Akira Ahagon, and Akihisa Kameari. "A new adaptive mesh refinement method in FEA based on conservation of magnetic field at interface between two elements." In 2016 IEEE Conference on Electromagnetic Field Computation (CEFC). IEEE, 2016. http://dx.doi.org/10.1109/cefc.2016.7815980.

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De Freitas, Abilio, J. Ablinger, Johannes Blümlein, A. Goedicke, C. Schneider, K. Schönwald, F. Wißbrock, and A. De Freitas. "The massive 3-loop operator matrix elements with two masses and the generalized variable flavor number scheme." In 13th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology). Trieste, Italy: Sissa Medialab, 2018. http://dx.doi.org/10.22323/1.290.0071.

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Scimemi, Ignazio, Ambar Jain, Andre Hoang, and Iain W. Stewart. "R-evolving QCD matrix elements." In RADCOR 2009 - 9th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology). Trieste, Italy: Sissa Medialab, 2010. http://dx.doi.org/10.22323/1.092.0041.

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Scimemi, Ignazio, Andre Hoang, Ambar Jain, and Iain W. Stewart. "The R-evolution of QCD matrix elements." In International Workshop on Effective Field Theories: from the pion to the upsilon. Trieste, Italy: Sissa Medialab, 2009. http://dx.doi.org/10.22323/1.069.0011.

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Kagan, David, and Harry Friedmann. "Optical Logic Elements From Four Level Systems Interacting With Two Fields." In 1986 Int'l Computing Conference, edited by Asher A. Friesem, Emanuel Marom, and Joseph Shamir. SPIE, 1987. http://dx.doi.org/10.1117/12.936940.

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Reports on the topic "Field of two elements"

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Smith, S. Jarrell, David W. Perkey, and Kelsey A. Fall. Cohesive Sediment Field Study : James River, Virginia. U.S. Army Engineer Research and Development Center, August 2021. http://dx.doi.org/10.21079/11681/41640.

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Estuaries trap much of the fine sediment delivered to them by rivers. This phenomenon presents challenges to the US Army Corps of Engineers (USACE) navigation mission, which maintains navigable waterways for waterborne commerce through estuarine regions. The USACE Regional Sediment Management Program and the USACE Norfolk District are conducting a regional sediment transport modeling study to identify cost-effective sediment management schemes in the James River, a tributary estuary of Chesapeake Bay. A key element of the sediment transport modeling study is the definition of cohesive sediment transport processes, such as erosion and settling velocity. This report describes field-based measurements of cohesive sediment erosion and settling velocity conducted in November 2017. The team conducted erosion testing on 15 cores collected throughout the tidal system. Additionally, two anchor stations were occupied to measure tidal variations in vertical distributions of suspended sediment concentration, particle size, and settling velocity. Recommended cohesive sediment transport parameters were developed from the field measurements.
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Yan, Yujie, and Jerome F. Hajjar. Automated Damage Assessment and Structural Modeling of Bridges with Visual Sensing Technology. Northeastern University, May 2021. http://dx.doi.org/10.17760/d20410114.

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Recent advances in visual sensing technology have gained much attention in the field of bridge inspection and management. Coupled with advanced robotic systems, state-of-the-art visual sensors can be used to obtain accurate documentation of bridges without the need for any special equipment or traffic closure. The captured visual sensor data can be post-processed to gather meaningful information for the bridge structures and hence to support bridge inspection and management. However, state-of-the-practice data postprocessing approaches require substantial manual operations, which can be time-consuming and expensive. The main objective of this study is to develop methods and algorithms to automate the post-processing of the visual sensor data towards the extraction of three main categories of information: 1) object information such as object identity, shapes, and spatial relationships - a novel heuristic-based method is proposed to automate the detection and recognition of main structural elements of steel girder bridges in both terrestrial and unmanned aerial vehicle (UAV)-based laser scanning data. Domain knowledge on the geometric and topological constraints of the structural elements is modeled and utilized as heuristics to guide the search as well as to reject erroneous detection results. 2) structural damage information, such as damage locations and quantities - to support the assessment of damage associated with small deformations, an advanced crack assessment method is proposed to enable automated detection and quantification of concrete cracks in critical structural elements based on UAV-based visual sensor data. In terms of damage associated with large deformations, based on the surface normal-based method proposed in Guldur et al. (2014), a new algorithm is developed to enhance the robustness of damage assessment for structural elements with curved surfaces. 3) three-dimensional volumetric models - the object information extracted from the laser scanning data is exploited to create a complete geometric representation for each structural element. In addition, mesh generation algorithms are developed to automatically convert the geometric representations into conformal all-hexahedron finite element meshes, which can be finally assembled to create a finite element model of the entire bridge. To validate the effectiveness of the developed methods and algorithms, several field data collections have been conducted to collect both the visual sensor data and the physical measurements from experimental specimens and in-service bridges. The data were collected using both terrestrial laser scanners combined with images, and laser scanners and cameras mounted to unmanned aerial vehicles.
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Jay L. Hirshfield. TWO-CHANNEL DIELECTRIC WAKE FIELD ACCELERATOR. Office of Scientific and Technical Information (OSTI), May 2012. http://dx.doi.org/10.2172/1041313.

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Luo, Hong, and Julie Holland Mortimer. Copyright Enforcement: Evidence from Two Field Experiments. Cambridge, MA: National Bureau of Economic Research, March 2016. http://dx.doi.org/10.3386/w22082.

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Boniwell, J. B. Downhole pulse EM-two recent field experiences. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/123630.

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Hirshfield, Jay L. COAXIAL TWO-CHANNEL DIELECTRIC WAKE FIELD ACCELERATOR. Office of Scientific and Technical Information (OSTI), April 2013. http://dx.doi.org/10.2172/1078119.

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Taylor, Douglas J. Evaluation of Singular Electric Field Integral Equation (EFIE) Matrix Elements. Fort Belvoir, VA: Defense Technical Information Center, June 2001. http://dx.doi.org/10.21236/ada389876.

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Berg, Larry K. Two-Column Aerosol Project (TCAP) Field Campaign Report. Office of Scientific and Technical Information (OSTI), May 2016. http://dx.doi.org/10.2172/1254831.

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Sedykh, P. A. Compatibility of Two System of Field-Aligned Currents. Balkan, Black sea and Caspian sea Regional Network for Space Weather Studies, October 2019. http://dx.doi.org/10.31401/sungeo.2019.01.08.

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Ivanov, Valentin, Andrey Petkun, Victor Ryzhov, and Igor Turchanovsky. Object-Oriented Two-Dimensional Electromagnetic Field Solver Code. Fort Belvoir, VA: Defense Technical Information Center, October 1995. http://dx.doi.org/10.21236/ada339361.

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