Dispersive media

Ebook "Soil mechanics and transport in porous media (Theory and applications of transport in porous media, Volume 19)" contains an overview of the most relevant scientific contributions of Gerard de Josselin de Jong to the development of both Soil Mechanics and Transport in Porous Media. The volume comprises a selection of papers by de Josselin de Jong as they were published in the international scientific literature. In addition, some unpublished, but highly relevant work has been included.

375p duongthandue0501 28-02-2024 3 1   Download

Part 2 book "Engineering electromagnetics" includes content: Time varying fields and Maxwell's equations; the uniform plane wave; plane waves at boundries and in dispersive media; transmission lines; waveguide and antenna fundamentals.

264p muasambanhan06 03-02-2024 4 2   Download

Ebook "Transport and fate of chemicals in the environment: Selected entries from the encyclopedia of sustainability science and technology" to predict and analyze this process, the mathematics of diffusion is applied to lakes, rivers, groundwater, the atmosphere, the oceans, and transport between these media. A sustainable world requires a deep understanding of the transport of chemicals through the environment and how to address and harness this process.

375p nhanphanguyet 28-01-2024 4 2   Download

The purpose of this book is to study the interaction of electromagnetic waves, and the application of direct current signals in different media, with topics that have very important applications in science and technology today.

154p dangnhuy06 25-05-2023 7 3   Download

The aim of this work is to research the interactions of water-soluble nitrogen-containing copolymers with essential amino acids in aqueous media. For this, poly(N-vinylformamide-co-N-vinylimidazole) and poly(N-vinylcaprolactam-co-N-vinylimidazole) random copolymers were synthesized by free radical polymerization. The products obtained are characterized by GPC, DLS, and FTIR. The copolymers have a narrow molecular weight distribution and low dispersity.

10p lyhuyenthu 31-01-2023 4 2   Download

The preparation of polyaniline (PANI) microrod arrays in the presence of dodecylbenzene sulfonic acid (DBSAH), a structure-directing agent, and in the presence of periodic acid (H5 IO6), an oxidant in aqua-acidic media, was investigated. DBSAH was performed to distinguish the roles of both surfactant and dopant. The method of preparation of DBSAH and H5 IO6 doped PANI (DBSAH–PANI) microrods in a reversed micelle had previously not been reported.

11p langthannam 29-12-2021 6 0   Download

In this study, amidoxime-functionalized silica decorated with copper (AFS-Cu) was fabricated and tested for its catalytic application. Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction were employed to characterize its structure and morphology. The application of AFS-Cu as a catalyst for the catalytic reduction of methylene blue (MB) in aqueous media using NaBH4 as reductant was evaluated. The ability to reuse as well as the effect of catalyst dose and pH of solution on the catalytic activity was investigated.

10p tudichquannguyet 29-11-2021 7 1   Download

This paper proposes a methodology to determine the equivalent electrical properties of multilayered human tissue using the Finite Difference Time Domain (FDTD) method for dispersive media. In addition, the impact of fat layer thickness on the equivalent dielectric properties has also been critically analyzed.

8p tamynhan4 06-09-2020 8 1   Download

Superparamagnetic iron oxide nanoparticles (MNP) offer several advantages for applications in biomedical and biotechnological research. In particular, MNP-based immobilization of enzymes allows high surface-to-volume ratio, good dispersibility, easy separation of enzymes from the reaction mixture, and reuse by applying an external magnetic field.

9p viuchiha2711 21-04-2020 15 2   Download

n this work, we review recent research works concerning multiple EIT and some related applications such as controlling group velocity of light, giant Kerr nonlinearity, optical bistability. The special attention of the review is also on analytical interpretations of the results to give physics insight and suitable applications. From an experimental point of view, the latest development for measuring multiple EIT spectrum and its dispersion in hot medium is presented and compared to the theoretical analytical representations.

33p letanhien2309 19-02-2019 39 1   Download

In this paper, a general propagation equation of ultrashort pulses in an arbitrary dispersive nonlinear medium has been used for the case of Kerr media. This equation which is called Generalized Nonlinear Schroedinger Equation usually has very complicated form and looking for its solutions is usually a very difficult task. Theoretical methods reviewed in this paper to solve this equation are effective only for some special cases.

23p thuyliebe 08-10-2018 21 2   Download

The transport parameters are estimated under supportting of software Hydrus 1D using the inverse parameter estimation method. Results of the experiments showed that dispersion coefficient, distribution coefficient and mass transfer coefficient characterized the ammonium transport process in the Con Son soil and aquifers are compatible with mechanical and physical properties of Con Son soil matrix and porous media.

12p cumeo4000 01-08-2018 25 0   Download

This chapter presents the following content: Reflection of uniform plane waves at normal incidence, standing wave ratio, wave reflection from multiple interfaces, plane wave propagation in general directions, plane wave reflection at oblique incidence angles, wave propagation in dispersive media.

45p youcanletgo_04 17-01-2016 42 1   Download

Is the role of the government and media policy moot in the age of the Internet? While it is surely true that the social organization of news media and their relations with diverse publics are complicated by the Internet, it is highly debatable whether this has led to a disintegration or dispersal of power, as some philosophers have argued.

53p thamgiacongdong 02-05-2013 52 5   Download

Following an extended period during which the research priorities of the discipline of television studies were oriented around audiences and reception practices, since the 1990s television scholars have “returned” to the television text. 3 In conjunction with this aesthetic (re)turn, scholars have undertaken to map the shifting horizons of the television text, revisiting and revising foundational models of television’s textuality in ways which account for dispersals, extensions, and expansions of the medium’s narratives and storyworlds across media.

35p dangsuynghi 27-03-2013 36 3   Download

We have attempted to explain the concepts which have been used and developed to model the stochastic dynamics of natural and biological systems. While the theory of stochastic differential equations and stochastic processes provide an attractive framework with an intuitive appeal to many problems with naturally induced variations, the solutions to such models are an active area of research, which is in its infancy. Therefore, this book should provide a large number of areas to research further.

253p hotmoingay 03-01-2013 51 4   Download

This book is devoted to one of the most interesting and rapidly developing areas of modern nonlinear physics and mathematics – theoretical, analytical and numerical, study of the structure and dynamics of one-dimensional as well as two- and three-dimensional solitons and nonlinear wave packets described by the Korteweg–de Vries (KdV), Kadomtsev–Petviashvili (KP), nonlinear Schr¨odinger (NLS) and derivative nonlinear Schr¨odinger (DNLS) classes of equations.

305p bachduong1311 07-12-2012 41 2   Download

Well known and established techniques, which allow obtaining intense laser pulses, have led to the development of advanced laser system used in science and various industries. Often at times, they combine Q-switching and mode-locking techniques in a single device to achieve unprecedented average pulse powers (e.g. HiLASE, HiPER, ELI, NIF, LiFE) for scientific applications, such as secondary sources of EUV, X-ray or particles, or as inertial confinement fusion (ICF) drivers.

0p cucdai_1 14-10-2012 58 10   Download

Estimating the transport and fate of chemicals released into the environment is an interesting and challenging task. The global environment is large on the chemical transport and fate scale. This text applies the mathematics of diffusion, turbulent diffusion, and dispersion to the atmosphere, lakes, rivers, groundwater, and oceans, as well as transport between these media. The book follows a new educational paradigm of textbooks, in that it is based on examples and case studies.

295p nhulan0908 29-09-2012 82 22   Download

In this research monograph, we explain the development of a mechanistic, stochastic theory of nonfickian solute dispersion in porous media. We have included sufficient amount of background material related to stochastic calculus and the scale dependency of diffusivity in this book so that it could be read independently.

242p greengrass304 15-09-2012 58 9   Download