Encapsulation of actives in miniature reservoirs, called microcapsules, is used for protection and particular controlled release the active. Regarding applications, most common function microcapsule to sustain or extend A number encapsulation methodologies are available including; internal phase separation, interfacial polymerization, formation multiple emulsions, Layer-by-Layer adsorption polyelectrolytes soft templating techniques, all which reviewed this Perspective. The choice method...

Abstract The Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation Analysis (TMPA) has provided a valuable precipitation dataset for hydrometeorological studies (1998–2015). However, TMPA shows some differences when compared to the ground-based estimates. In this study, correction model is developed improve accuracy of TRMM monthly product by reducing bias 3B43 with Parameter-Elevation Regressions on Independent Slopes Model (PRISM) and gridded estimates acquired from CPC...

Measurements of the nuclear magnetic resonance (NMR) signal’s behavior with time provide powerful noninvasive insight into pore-scale environment. The dependence NMR signal, which is a function parameters called relaxation times, intimately linked to geometry pore space and has been used successfully estimate size permeability. basis for permeability estimates that interactions occurring at grain surface often as primary mechanism controlling signal. In this limit, fast diffusion when each...

Summary Studies on colloidal aggregation have brought forth theories stability of gels and models for dynamics. Still, a complete link between developed frameworks obtained laboratory observations has to be found. In this work, aggregates silica nanoparticles (20 nm) are studied using diffusion limited cluster (DLCA) reaction (RLCA) models. These processes driven by the probability particles aggregate upon collision. This is one in DLCA close zero RLCA process. We show how study from static...

Summary In this study, we investigate the functional behaviour of intensity in high‐angle annular dark field scanning transmission electron micrograph images. The model material is a silica particle (20 nm) gel at 5 wt%. By assuming that response monotonically increasing with mass thickness silica, an estimate form calculated using maximum likelihood approach. We conclude linear provides fair but power function significantly better for estimating amount z ‐direction. work adds to development...

Most theoretical treatments of Nuclear Magnetic Resonance (NMR) measurements porous media assume ideal pore geometries for the pores (i.e. slabs, spheres or cylinders) with welldefined surface-to-volume ratios (S/V). This same assumption is commonly adopted naturally occurring materials, where geometry can differ substantially from these shapes. In this paper effect roughness surface on T2 relaxation spectrum studied. By homogenization problem using an electrostatic approach it found that...

Colloidal systems are of importance not only for everyday products, but also the development new advanced materials. In many applications, it is crucial to understand and control colloidal interaction. this paper, we study particle aggregation silica nanoparticles, where data given in a three-dimensional micrograph obtained by high-angle annular dark field scanning transmission electron microscopy tomography. We investigate whether dynamic models aggregation, namely diffusion limited cluster...

A finite difference approach for computing Laplacian eigenvalues and eigenvectors in discrete porous media is derived used to approximately solve the Bloch–Torrey equations. Neumann, Dirichlet, Robin boundary conditions are considered applications simulate nuclear magnetic resonance diffusion experiments shown. The method illustrated with MATLAB examples computational tests one two dimensions extension three outlined. © 2015 Wiley Periodicals, Inc. Concepts Magn Reson Part 44A: 160–180, 2015.

Most theoretical treatments of Nuclear Magnetic Resonance (NMR) assume ideal smooth geometries (i.e. slabs, spheres or cylinders) with well-defined surface-to-volume ratios (S/V). This same assumption is commonly adopted for naturally occurring materials, where the pore geometry can differ substantially from these shapes. In this paper effect surface roughness on T2 relaxation spectrum studied. By homogenization problem using an electrostatic approach it found that effective relaxivity...

This paper introduces a new coherent methodology for Systems Analysis (SA) as tool the search of best submarine design different mission types and under diverse conditions. In naval there are usually two critical objective attributes, i.e. systems effectiveness cost, first to be maximised second minimised. The contains four major parts; module technical in functional domain based on synthesised approach, prediction related cost an Operations (OA) calculation. Finally, three parts,...

This paper presents a mixed basis approach for Laplace eigenvalue problems, which treats the boundary as perturbation of free operator. The method separates from volume via generic function that can be pre-calculated and thereby effectively reduces complexity problem to calculation over surface. Several eigenvalues are retrieved simultaneously. is applied several 2 dimensional geometries with Neumann conditions.

In the field of hydrogeophysics, images are often used to communicate information about subsurface properties and processes. Such derived from measurements, modeling, or a combination two inherently contain varying degree uncertainty. This poses challenge, since not only should interpreted results be conveyed in such images, but also uncertainty representation. The question we seek address is: How do generate single image that communicates interpretation? an attempt answer this question,...

In this paper commutator expansions for solving the Bloch-Torrey's equation are derived. An exact solution free diffusion in a constant magnetic field gradient is found. Furthermore moments of signal short pulse limit spins confined to restricted geometry The tested numerically against known diffusing between two perpendicular plates limit.

An approximative method for solving the Bloch-Torrey equation in general porous media is presented. The expand boundaries defining using electrostatic charges. As a result eigenvalue problem of Laplace operator confined geometry can approximately solved. Importantly solution orthogonal low-frequent region Fourier space. This gives natural approach studying spin magnetization presence magnetic fields. error approximation scales with N^{-2} times magnitude each eigenvalue, where N size...