Results 21 to 30 of about 60,674 (269)

The Effect of Hole Radius on The Properties of Large Pitch Photonic Crystal Fiber [PDF]

مجلة التربية والعلم, 2011
Three proposals of large pitch (Λ=5µm) photonic crystal fibers (PCFs) are studied. The effect of air hole radius on the properties of the fundamental mode of these fibers are considered.
Rasha Abdulaziz Faris Abdulghafor Ibrahim Abdullah
doaj   +1 more source

Liquid dispersion in packed columns: Experiments and numerical modeling [PDF]

Chemical Engineering Science, 2013
In order to optimize the design of gas-liquid packed columns used in distillation or in absorption processes, it is of high importance to be able to predict liquid dispersion. Indeed, dispersion phenomena will impact the choice and design of liquid distributing devices and the height of the packed beds.
Fourati, Manel, Roig, Véronique, Raynal, Ludovic   +2 more
openaire   +5 more sources

Numerical Modelling of Gas Mixing in Salt Caverns During Cyclic Hydrogen Storage

Energies
This study presents the development of a robust numerical model for simulating underground hydrogen storage (UHS) in salt caverns, with a particular focus on the interactions between original gas-methane (CH4) and injected gas represented by hydrogen (H2)
Krzysztof Miłek, Wiesław Szott
doaj   +1 more source

Quantum Algorithm for Solving the Wave Equation on a Hexagonal Grid

IEEE Access
Numerical methods based on finite differences for solving the wave equation are prone to various errors, a challenge that also applies to the semi-discrete case of a recently proposed quantum algorithm that preserves continuous time while discretizing ...
Roman Novak
doaj   +1 more source

Numerical Methods for Fractional Reaction-Dispersion Equation with Riesz Space Fractional Derivative [PDF]

Engineering and Technology Journal, 2011
In this paper, a numerical solution of fractional reaction-dispersion equation with Riesz space fractional derivative has been presented. The algorithm for the numerical solution for this equation is based on two finite difference methods.
I. I. Gorial
doaj   +1 more source

Elastic-wave-equation numerical simulation using a time–space domain dispersion-relation-based staggered-grid finite-difference method

Frontiers in Earth Science
Compared to the conventional high-order staggered-grid finite-difference method (C-SFD), the time–space domain dispersion-relation-based high-order staggered-grid finite-difference method (TS-SFD) can suppress the numerical dispersion more efficiently to
Xuewen Shi, Xuewen Shi, Chang Wang, Chang Wang, Chang Wang, Wei Liu, Wei Liu, Dongjun Zhang, Dongjun Zhang, Ziduo Hu, Ziduo Hu, Yanwen Feng, Yanwen Feng, Yang Gao, Yang Gao, Yang Gao, Zhiwen Zhou, Zhiwen Zhou   +17 more
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source

Health‐Related Social Needs in Children With Sickle Cell Disease Are Associated With Worse Health‐Related Quality of Life

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with sickle cell disease (SCD) face multiple acute and chronic medical complications that may impact their quality of life as reported by patients themselves. Health‐related social needs (HRSNs), such as food and housing insecurity, are common in people with SCD, but the association between HRSNs and patient‐reported ...
Sarah J. Marks, Molly Sonenklar, Cerelia Donald, Cecelia Valrie, Wally Smith, India Sisler   +5 more
wiley   +1 more source

A Hybrid Smoothed Finite Element Method for Predicting the Sound Field in the Enclosure with High Wave Numbers

Shock and Vibration, 2019
Wave-based methods for acoustic simulations within enclosures suffer the numerical dispersion and then usually have evident dispersion error for problems with high wave numbers.
Haitao Wang, Xiangyang Zeng, Ye Lei
doaj   +1 more source

GEOTEXTILE AND GEOMEMBRANE USAGE IN AN IRAQI SANDY GEOENVIRONMENT

Journal of Engineering, 2008
The work in this research presents an experimental and a theoretical study to obtain the effect of using a low permeability geosynthetic material on the longitudinal and lateral coefficients of dispersion.
Omar al-Farouk S. al-Damluji, Mustafa Malik Jasim   +1 more
doaj   +1 more source