Results 141 to 150 of about 549,735 (196)
Advanced Functional Materials, EarlyView.Flexible piezoresistive pressure sensors underpin wearable and soft electronics. This review links sensing physics, including contact resistance modulation, quantum tunneling and percolation, to unified materials/structure design. We highlight composite and graded architectures, interfacial/porous engineering, and microstructured 3D conductive networks
Feng Luo +2 more
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A Non‐Reciprocal Architected Porous Medium
Advanced Functional Materials, EarlyView.ABSTRACT In several fluid flow, energy‐dumping, and energy‐harvesting applications, a dominant flow direction or dominant resistance direction is desirable. In this study, we propose a simple modular geometry that doubles flow resistance in one direction relative to the opposite direction, while maintaining laminar viscous flow.
Clément Vezies +2 more
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Contrasting Symmetric Porosity and Porosity
Journal of Applied Analysis, 1998The aim of the paper is to compare the behaviour of sets with respect to symmetric porosity and porosity. The authors have found several similarities as well as several differences.
Evans, M. J., Humke, P. D.
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2010
We give a short overview of dimensional properties of porous sets and measures. A special emphasis is given to the heuristic ideas behind a recent result giving the best possible upper bound for the packing dimension of mean porous measures. This chapter is based on the paper Beliaev et al. (J Lond Math Soc, 2009), which is a joint work with D. Beliaev,
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We give a short overview of dimensional properties of porous sets and measures. A special emphasis is given to the heuristic ideas behind a recent result giving the best possible upper bound for the packing dimension of mean porous measures. This chapter is based on the paper Beliaev et al. (J Lond Math Soc, 2009), which is a joint work with D. Beliaev,
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Shrinkage Porosity and Gas Porosity
2008Abstract This article provides a detailed discussion on the causes of formation of shrinkage porosity and gas porosity along with the methods involved in eliminating them. It discusses the process of porosity formation and the factors affecting porosity formation, including alloy composition, external pressure, and cooling conditions.
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Porosity and Approximate Derivatives
Canadian Journal of Mathematics, 1986In recent years, a considerable amount of research has been devoted to questions involving set porosity, particularly as it relates to differentiation theory. We may express the type of question in which we are interested by using the language of path derivatives and sequential derivatives.
Bruckner, A. M. +3 more
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Porosity of restorative resins
European Journal of Oral Sciences, 1983Abstract – Polyethylene tubes were filled with different types of composite resins using either the bulk‐packing technique or the syringe injection technique. The porosity of the specimens was studied. Specimens made by light‐activated systems were less porous compared to specimens made by two‐paste systems. Use of the injection technique was followed
Gotfredsen, P, Hörsted, P, Kragstrup, J
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Porosity… Advantage or Disadvantage?
Microscopy and Microanalysis, 2015Nowadays, due to the increasing demand on portable electronic devices with ultrahigh density data storage and lower power consumption, the miniaturization of ferroelectrics has become an important issue. This progressive development requires the morphology control of the materials and the understanding of the effects of size reduction on the properties
Castro, Alichandra +3 more
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Porosity Supremum-Infimum and Porosity Convergence
2017In this paper, by using porosity notion for subsets of natural numbers at infinity porosity lower and porosity upper bound of real valued sequences will be defined. By using these new notions, definitions of porosity infimum and porosity supremum will be given, respectively.
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Evaluating Porosity Parameters for Porosity–Property Relations
Journal of the American Ceramic Society, 1993Porosity parameters are considered from the standpoint of a map of the volume fraction porosity (P) and the ratio of normalized radii of the pore ( r p ) and the solid particles, webs, or ligaments ( r
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