scholarly journals Effects of Electric Field on the SHS Flame Propagation of the Si-C System, Examined by the Use of the Heterogeneous Theory

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Atsushi Makino
Keyword(s):  
Electric Field ◽  
Heat Loss ◽  
Flame Propagation ◽  
Analytical Study ◽  
Essential Feature ◽  
Experimental Comparison ◽  
Exothermic Reactions ◽  
High Temperature Synthesis ◽  
Insight Into ◽  
Fair Degree

Relevant to the self-propagating high-temperature synthesis (SHS) process, an analytical study has been conducted to investigate the effects of electric field on the combustion behavior because the electric field is indispensable for systems with weak exothermic reactions to sustain flame propagation. In the present study, use has been made of the heterogeneous theory which can satisfactorily account for the premixed mode of the bulk flame propagation supported by the nonpremixed mode of particle consumption. It has been confirmed that, even for the SHS flame propagation under electric field, being well recognized to be facilitated, there exists a limit of flammability, due to heat loss, as is the case for the usual SHS flame propagation. Since the heat loss is closely related to the representative sizes of particles and compacted specimen, this identification provides useful insight into manipulating the SHS flame propagation under electric field, by presenting appropriate combinations of those sizes. A fair degree of agreement has been demonstrated through conducting an experimental comparison, as far as the trend and the approximate magnitude are concerned, suggesting that an essential feature has been captured by the present study.

Optimization of heat loss reduction from the gas holder: Analytical study

1987 ◽  
Vol 27 (2) ◽  
pp. 127-131 ◽  
Author(s):  
G.N. Tiwari ◽  
Y.P. Yadav ◽  
A. Srivastava
Keyword(s):  
Heat Loss ◽  
Analytical Study ◽  
Loss Reduction

scholarly journals An Analytical study of Bediuzzaman Said Nursi’s Intellectual Development and Composition of Risale-i Nur (a Thematic Qur’ānic Exegesis)

2020 ◽  
Vol 10 (2) ◽  
Author(s):  
Dr. Shumaila Majeed
Keyword(s):  
Intellectual Development ◽  
Analytical Study ◽  
Muslim Community ◽  
The Third ◽  
Life Education ◽  
Representative Work ◽  
Qur'anic Exegesis ◽  
Islamic Belief ◽  
Distinguishing Features ◽  
Insight Into

The current study analyses Bediuzzaman Said Nursi’s life and contributions. It presents a short description of his early life, education and dissatisfaction with the then prevailing education systems. This is followed by an analysis of his intellectual development due to rapidly changing circumstances. The paper also presents an insight into Nursi’s representative work ‘Risale-i Nur’ through an analysis of its structure and methodology. This is significant because his intellectual development, due to changes in his circumstances, played an instrumental role in determining the style, method and objectives of Risale. Hence, the study of his intellectual development is imperative to understand the objectives of Risale. The findings of the paper revealed that Nursi’s approach to reform the Muslim society was not stagnant. In the ‘Old Said’ phase, he attempted to neutralize the decline in Muslim community through sociopolitical reforms. The ‘New Said’ phase was marked by his efforts to strengthen belief, encounter anti-religious ideologies and detachment from politics. In the ‘Third Said’ phase, he again took interest in sociopolitical matters but it was limited to the theoretical realm with no practical involvement. The study also found that the structure of Risale, its treatment of subjects and its methodology are its distinguishing features. It consists of the elements well-suited to the needs of the time to save Islamic belief against the onslaught of atheistic ideologies. The current research was conducted using the qualitative approach. It is beneficial for academia in understanding the intellectual development of this great 20th century Turkish Muslim scholar.

scholarly journals An experimental comparison of human and bovine rhodopsin provides insight into the molecular basis of retinal disease

FEBS Letters ◽  
2017 ◽  
Vol 591 (12) ◽  
pp. 1720-1731 ◽  
Author(s):  
James M. Morrow ◽  
Gianni M. Castiglione ◽  
Sarah Z. Dungan ◽  
Portia L. Tang ◽  
Nihar Bhattacharyya ◽  
...  
Keyword(s):  
Molecular Basis ◽  
Retinal Disease ◽  
Experimental Comparison ◽  
Bovine Rhodopsin ◽  
Insight Into

Effect of an electric field on the flame propagation over a solid material surface

1992 ◽  
Vol 28 (3) ◽  
pp. 244-246 ◽  
Author(s):  
A. F. Panteleev ◽  
G. A. Popkov ◽  
S. G. Tsarichenko ◽  
Yu. N. Shebeko
Keyword(s):  
Electric Field ◽  
Flame Propagation ◽  
Solid Material ◽  
Material Surface

Alignment of carbon nanotubes under the influences of nematic liquid crystals and electric fields — an analytical study

2021 ◽  
Author(s):  
Setia Budi Sumandra ◽  
Bhisma Mahendra ◽  
Fahrudin Nugroho ◽  
Yusril Yusuf
Keyword(s):  
Carbon Nanotubes ◽  
Free Energy ◽  
Electric Field ◽  
Electric Fields ◽  
Analytical Study ◽  
Free Energy Density ◽  
Diameter Ratio ◽  
Order Parameters ◽  
Anchoring Strength ◽  
Length To Diameter Ratio

Carbon nanotubes (CNTs) have benefits in various fields, they are disadvantageous due to their tendency to form aggregates and poorly controlled alignment of the CNT molecules (characterized by order parameters). These deficiencies can be overcome by dispersing the CNTs in nematic liquid crystal (LC) and placing the mixture under the influence of an electric field. In this study, Doi and Landau–de Gennes free energy density equations are used to analytically confirm that an electric field increases the order parameters of CNTs and LCs in a dispersion mixture. The anchoring strength of the nematic LC is also found to affect the order parameters of the CNTs and LC. Further, increasing the length-to-diameter ratio of the CNTs increases their alignment without affecting the LC alignment. These findings indicate that CNT molecular alignment can be controlled by adjusting the CNT length-to-diameter ratio, anchoring the LCs, and adjusting the electric field strength.

Magnetic State Switching in FeGa Microstructures

2021 ◽  
Author(s):  
MICHAEL GUEVARA DE JESUS ◽  
Zhuyun Xiao ◽  
Maite Goiriena-Goikoetxea ◽  
Rajesh V Chopdekar ◽  
Mohanchandra K Panduranga ◽  
...  
Keyword(s):  
Electric Field ◽  
Magnetic Circular Dichroism ◽  
Axial Strain ◽  
Vortex State ◽  
Magnetoelectric Composite ◽  
Domain Structures ◽  
Photoemission Electron ◽  
Insight Into ◽  
Electric Field Induced Strain

Abstract This work demonstrates that magnetoelectric composite heterostructures can be designed at the length scale of 10 microns that can be switched from a magnetized state to a vortex state, effectively switching the magnetization off, using electric field induced strain. This was accomplished using thin film magnetoelectric heterostructures of Fe81.4Ga18.6 on a single crystal (011) [Pb(Mg1/3Nb2/3)O3]0.68-[PbTiO3]0.32 (PMN-32PT) ferroelectric substrate. The heterostructures were tripped from a multi-domain magnetized state to a flux closure vortex state using voltage induced strain in a piezoelectric substrate. FeGa heterostructures were deposited on a Si-substrate for SQUID magnetometry characterization of the magnetic properties. The magnetoelectric coupling of a FeGa continuous film on PMN-32PT was characterized using a MOKE magnetometer with bi-axial strain gauges, and magnetic multi-domain heterostructures were imaged using X-Ray Magnetic Circular Dichroism – Photoemission Electron Microscopy (XMCD-PEEM) during the transition to the vortex state. The domain structures were modelled using MuMax3, a micromagnetics code, and compared with observations. The results provide considerable insight into designing magnetoelectric heterostructures that can be switched from an “on” state to an “off” state using electric field induced strain.

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