Help


[permalink] [id link]
+
Page "Superparamagnetism" ¶ 16
from Wikipedia
Edit
Promote Demote Fragment Fix

Some Related Sentences

When and external
When, therefore, it turned its attention to the concrete entities with which popular imagination had peopled the world of spirit, these entities soon lost whatever status they had enjoyed as actual elements of external reality.
In 2009, the American Anthropological Association's Commission on the Engagement of Anthropology with the US Security and Intelligence Communities released its final report concluding, in part, that, " When ethnographic investigation is determined by military missions, not subject to external review, where data collection occurs in the context of war, integrated into the goals of counterinsurgency, and in a potentially coercive environment – all characteristic factors of the HTS concept and its application – it can no longer be considered a legitimate professional exercise of anthropology.
When combined with setting transparency, this allows an Amiga to overlay an external video source with graphics.
When a body is acted upon by external contact forces, internal contact forces are then transmitted from point to point inside the body to balance their action, according to Newton's second law of motion of conservation of linear momentum and angular momentum ( for continuous bodies these laws are called the Euler's equations of motion ).
When the stale air, warmed from the lungs, is exhaled, it condenses as it meets colder external air.
When all that is left is an organism-shaped hole in the rock, it is called an external mold.
When the temperature rises beyond a certain point, called the Curie temperature, there is a second-order phase transition and the system can no longer maintain a spontaneous magnetization, although it still responds paramagnetically to an external field.
When pharmacological methods fail, a purpose-designed external vacuum pump can be used to attain erection, with a separate compression ring fitted to the penis to maintain it.
When astrologers predicted that his own son would some day become a Christian, Abenner had the young prince Josaphat isolated from external contact.
When such an electron decays without external influence, emitting a photon, that is called " spontaneous emission ".
When an external electric field is applied to the liquid crystal, the dipole molecules tend to orient themselves along the direction of the field.
When an external magnetic field is applied, these magnetic moments will tend to align themselves in the same direction as the applied field, thus reinforcing it.
When placed on the external address bus, it replicates the original functions of B and C. Port A has input capture, output compare, pulse accumulator, and other timer functions ; port D has serial I / O, and port E has an analog to digital converter ( ADC ).
When GPIO pins are configured to an input state, they are often used to read sensors or external signals.
When there are hard external constraints on system latency, developers often need tools to measure interrupt latencies and track down which critical sections cause slowdowns.
When a superconductor is placed in a weak external magnetic field H, and cooled below its transition temperature, the magnetic field is ejected.
When such an electron decays without external influence, emitting a photon, that is called " spontaneous emission ".
When he only sees lights and shapes, he puts this down to being a bad visualiser, however, he experiences a great change in his perception of the external world.
When an atom is probed by an external mechanism, such as a photon or a beam of electrons with energies in the range of 2 keV to 50 keV, a core state electron can be removed leaving behind a hole.
When an area element is radiating as a result of being illuminated by an external source, the irradiance ( energy or photons / time / area ) landing on that area element will be proportional to the cosine of the angle between the illuminating source and the normal.
When most materials are polarized, the polarization induced, P, is almost exactly proportional to the applied external electric field E ; so the polarization is a linear function.
When the external power supply is switched on, the metal at the anode is oxidized from the zero valence state to form cations with a positive charge.
When loaning outside the EU, the bank has lending mandates based on EU external cooperation and development policies, which differ region to region.
When the gemstones are in a rough state, the gemologist studies the external structure ; the host rock and mineral association ; and natural and polished colour.

When and magnetic
When a beam of silver atoms was passed through a specially shaped magnetic field, the beam was split based on the direction of an atom's angular momentum, or spin.
When placed in an electric or magnetic field, equal but opposite forces arise on each side of the dipole creating a torque τ:
When the current changes, the magnetic field does too, inducing a voltage between the ends of the conductor.
When these tiny magnetic dipoles are aligned in the same direction, their individual magnetic fields add together to create a measurable macroscopic field.
When combined with yttrium, it forms highly magnetic compounds.
When a magnetic field is present that is not parallel to the direction of motion of moving charges, these charges experience a force, called the Lorentz force.
When such a magnetic field is absent, the charges follow approximately straight, ' line of sight ' paths between collisions with impurities, phonons, etc.
When a current-carrying semiconductor is kept in a magnetic field, the charge carriers of the semiconductor experience a force in a direction perpendicular to both the magnetic field and the current.
When electrons flow through a conductor, a magnetic field is produced.
When the current flowing through an inductor changes, creating a time-varying magnetic field inside the coil, a voltage is induced, according to Faraday's law of electromagnetic induction, which by Lenz's law opposes the change in current that created it.
When a magnetic field is applied, the molecules will tend to align with or against the field.
When a person is inside the powerful magnetic field of the scanner, the average magnetic moment of many protons becomes aligned with the direction of the field.
: When a material is put in a magnetic field, the electrons circling the nucleus will experience, in addition to their Coulomb attraction to the nucleus, a Lorentz force from the magnetic field.
When exposed to a magnetic field, the domain boundaries move so that the domains aligned with the magnetic field grow and dominate the structure as shown at the left.
When a magnetized ferromagnetic material is heated to the Curie point temperature, the molecules are agitated to the point that the magnetic domains lose the organization and the magnetic properties they cause cease.
When a ferromagnet or ferrimagnet is sufficiently small, it acts like a single magnetic spin that is subject to Brownian motion.
When a charged particle moves through a magnetic field B, it feels a Lorentz force F given by the cross product:

0.337 seconds.