Results 101 to 110 of about 372,553 (214)

The physical properties of magnetic inks [PDF]

open access: yes, 1988
The magnetic particle inspection (MPI) method is a widely used non destructive testing (NDT) technique for ferrous structures. Magnetic inks used in MPI are suspensions of fine ferro/ferrimagnetic particles which, when applied to a magnetized test ...
McCoy, J.M, McCoy, James Martin
core  

A Global Magnetic Topology Model for Magnetic Clouds. V

open access: yesThe Astrophysical Journal
Magnetic clouds (MCs) are large-scale magnetic structures in the solar wind whose internal physical processes remain only partially understood. In this work, we present an extended analytical model of MCs that simultaneously describes the magnetic field,
M. A. Hidalgo
doaj   +1 more source

Energy Bounds from Relative Magnetic Helicity in Spherical Shells

open access: yesThe Astrophysical Journal
Relative magnetic helicity is commonly used in solar physics to avoid the well-known gauge ambiguity of standard magnetic helicity in magnetically open domains.
Anthony R. Yeates, Gunnar Hornig
doaj   +1 more source

Magnetic Structure of Sunspots

open access: yesLiving Reviews in Solar Physics, 2011
In this review we give an overview about the current state-of-knowledge of the magnetic field in sunspots from an observational point of view. We start by offering a brief description of tools that are most commonly employed to infer the magnetic field ...
Juan M. Borrero, Kiyoshi Ichimoto
doaj  

Mitigation of Low-Frequency Magnetic Fields in Sweden [PDF]

open access: yes, 2013
The paper describes action to protect the general public and workers. Swedish authorities launched a precautionary principle to protect the general public against EMF in 1995, due to the research on childhood cancer and magnetic field exposure.
Hamnerius, Yngve,, Nilsson, Tomas,
core  

SIMPLIFI—Study of Interstellar Magnetic Polarization: A Legacy Investigation of Filaments. I. Magnetically Guided Accretion onto the DR21 Ridge

open access: yesThe Astrophysical Journal
We present first results from SIMPLIFI (Study of Interstellar Magnetic Polarization: a Legacy Investigation of Filaments), a SOFIA/HAWC+ 214  μ m polarimetric survey of Galactic molecular cloud filaments.
Thushara G. S. Pillai   +17 more
doaj   +1 more source

Intermingled Open and Closed Magnetic Field Lines near the Radial Origin of the Heliospheric Current Sheet

open access: yesThe Astrophysical Journal Letters
On 2024 March 30, the Parker Solar Probe crossed the heliospheric current sheet at 13 solar radii while encountering two distinctly different regions at sharp boundaries on several occasions.
F. S. Mozer   +5 more
doaj   +1 more source

The effect of AC magnetic fields on liquid-metal free surfaces in industrialMHD. [PDF]

open access: yes, 2009
In this thesis we investigate free-surface instabilities which occur in various industrial processes involving liquid metal. Specifically, we examine a number of simple problems with a view to developing a plausible theoretical description based on MHD ...
Spragg, Kirk John
core  

Characterization of Small Flux Ropes Using Juno Spacecraft Cruise-phase Data

open access: yesThe Astrophysical Journal
In this study, we utilize magnetic field data from the Juno mission’s cruise phase to visually identify and analyze 338 interplanetary small flux ropes (SFRs) across a heliocentric distance range of 1–5.5 au.
Sahanaj A. Banu   +7 more
doaj   +1 more source

Temperature and strain scaling laws for the critical current density in Nb(_3)Sn and Nb(_3)Al conductors in high magnetic fields [PDF]

open access: yes, 2001
Detailed, accurate measurements of critical current density and resistivity to determine the upper critical field have been made on a technological NbsAl conductor in magnetic fields up to 15 T, temperatures from 4.2 K up to the critical temperature and ...
Keys, Simon Alastair
core  

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