Results 41 to 50 of about 5,648,704 (342)

Study the effect of Pitch size When the number of rings of the second air gaps on the dispersion profile of Photonic Crystal Fibers

Tikrit Journal of Pure Science, 2023
The need for a fibre optics working in the visible part of the electromagnetic spectrum has led to the development of new kind of fibre optics called photonic crystal fibre (PCF).In this paper we have investigate the effect of the pitch distance Λ as a ...
Basira Q. Sulaiman, Esam Sameen Ali, Nihad Ali Shafeek   +2 more
doaj   +1 more source

Gap deformation and classical wave localization in disordered two-dimensional photonic band gap materials

, 2000
By using two ab initio numerical methods we study the effects that disorder has on the spectral gaps and on wave localization in two-dimensional photonic band gap materials.
C. F. Bohren, C. M. Soukoulis, C. T. Chan, E. Lidorikis, E. Lidorikis, E. N. Economou, G. Mie, J. B. Pendry, J. D. Joannopoulos, K. S. Yee, Kazuaki Sakoda, M. Kafesaki, M. M. Sigalas, M. M. Sigalas, S. Datta, S. Fan   +15 more
core   +1 more source

Simulation of positive streamer propagation in an air gap with a GFRP composite barrier

High Voltage, 2021
The puncture of glass fibre reinforced polymer (GFRP) laminate is a primary damage pattern of wind turbine blades due to lightning strikes. A numerical simulation model of positive streamer propagation in a needle‐to‐plate air gap with a GFRP laminate is
Hengxin He, Dezhi Xia, Bin Luo, Weijiang Chen, Kai Bian, NianWen Xiang   +5 more
doaj   +1 more source

Do roots mind the gap? [PDF]

, 2012
Roots need to be in good contact with the soil to take up water and nutrients. However, when the soil dries and roots shrink, air-filled gaps form at the root-soil interface.
A. Carminati, D. Vetterlein, H.-J. Vogel, N. Koebernick, S. Blaser, U. Weller   +5 more
core   +1 more source

Analytical investigation of the armature current influence on the torque and radial force in eccentric consequent‐pole PM machines

IET Electric Power Applications, 2021
In this work, the electromagnetic torque and the unbalanced magnetic force (UMF) in eccentric consequent pole PM (CPPM) machines are investigated. For this investigation, in the first part of the paper, an exact analytical model is provided for the CPPM ...
Samad Taghipour Boroujeni, Seyed Payam Emami, Noureddine Takorabet, Amin Mahmoudi   +3 more
doaj   +1 more source

A Study of Temperature and Humidity Conditions in a New Energy-Efficient Design of a Wall Structure with Air Gaps

Modelling
This manuscript presents a theoretical study of a newly developed energy-efficient external wall structure in comparison with a traditional ventilated facade.
Nurlan Zhangabay, Timur Tursunkululy, Akmaral Utelbayeva, Uliya Abdikerova, Murat Sultanov   +4 more
doaj   +1 more source

Flux concentrated doubly salient linear permanent magnet machine

The Journal of Engineering, 2019
Different topologies of Vernier permanent magnet (PM) machines have been proposed for direct drive low-speed applications due to their high thrust and power density. However, this type of machine can suffer from low power factor (PF).
Ahmed A. Almoraya, Nick J. Baker, Kristopher J. Smith, Mohammad A. H. Raihan   +3 more
doaj   +1 more source

A novel high torque density six‐phase axial‐flux permanent magnet synchronous motor with 60° phase‐belt toroidal winding configuration

IET Electric Power Applications, 2022
The three‐phase permanent magnet synchronous motor (three‐phase PMSM) has gained much popularity in many applications due to its various advantages. In addition, due to the good fault tolerance, simple inverter circuit structure and high torque density ...
Jikai Si, Can Feng, Rui Nie, Yihua Hu, Yingsheng Li   +4 more
doaj   +1 more source

Financial Burden Associated With Hospitalisation Among Families of Childhood Brain Tumours in Australia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Families of children with cancer experience significant financial strain, even with universal healthcare. Indirect costs, such as productivity losses and non‐medical expenses, are rarely included in economic evaluations, and little is known about how effectively financial aid programmes alleviate this burden. Childhood brain tumours
Megumi Lim, Natalie Bradford, David Brain, Sameera Senanayake, Sanjeewa Kularatna, Kate Young, Christine Cashion, Tim Hassall, Susanna Cramb   +8 more
wiley   +1 more source

Analysis of magnetic field distribution in induction machine with combined star-delta stator winding

The Journal of Engineering, 2019
An induction machine with combined star-delta stator winding is analysed by means of numerical simulations based on lump parameter and finite element method (FEM) models.
M Chomat, L Schreier, L Schreier, J Bendl   +3 more
doaj   +1 more source