What's the difference between attractor and magnet?

Attractor


Definition:

  • (n.) One who, or that which, attracts.

Example Sentences:

  • (1) With larger differences in the analog values (and larger feedback error) at each iteration, we found that networks learned to transmit different chaotic attractors.
  • (2) To explain these contentions, the history, strengths, and limits of reductionist thinking are discussed, and aspects of chaos science, such as the butterfly effect and strange attractors, are described.
  • (3) The background was hotter on one side of the sky and cooler on the other: a "dipole" that meant our galaxy was moving at a phenomenal relative speed, which could only be explained if there was a huge undiscovered distant structure somewhere in space, such as a supercluster of galaxies, pulling it (this was found later and is called the "great attractor").
  • (4) Responses to the program may include more than one attractor.
  • (5) However, when electrical coupling between cells was allowed, the interactions with neighboring cells exhibiting chaotic dynamics resulted in characteristic alterations of the attractor geometry.
  • (6) The Lyapunov exponents and dimension of an attractor are found.
  • (7) The salient dynamics on the attractor can thus be completely described by the return map of a section which is a logistic interval map.
  • (8) Depending upon the experimental parameter values, stable attractors, various types of multiple states and sustained oscillations were shown to occur.
  • (9) Under certain conditions of stimulation, the attractor in the return map during chaotic activity of the single cell resembled the Lorenz tent map.
  • (10) Incentives or reinforcers are attractors in behavior space, at the centers of basins of lowered potential.
  • (11) Epigenetic regulation, as we describe it, involves positive feedback loops and promotes differentiation as it forces elements of a system to choose between two extreme levels called attractors.
  • (12) We describe a modified attractor neural network in which neuronal dynamics takes place on a time scale of the absolute refractory period but the mean temporal firing rate of any neuron in the network is lower by an arbitrary factor that characterizes the strength of the effective inhibition.
  • (13) Open processes containing and exchanging energy fluctuate between opposite states ("periodic attractors"); they are characteristic of most physiological rhythms and are exaggerated in bipolar subjects.
  • (14) Unambiguous evidence of attractor behaviour in delta sleep is presented.
  • (15) In the case of two complementary B cell clones, the chaotic attractor has a number of features in common with the Lorenz attractor.
  • (16) Using a time series obtained from the electroencephalogram recording of a human epileptic seizure, we show the existence of a chaotic attractor, the latter being the direct consequence of the deterministic nature of brain activity.
  • (17) The attractor dimension of the catalytic site in the acylated state was found to be indistinguishable from that of the substrate mobilizable conformation.
  • (18) A thermodynamic potential with two attractor regions, each with a local minimum, governs corneal stromal swelling.
  • (19) These results demonstrate that mucosal capillaries have a variable negative electrostatic charge on the endothelial surface and support the hypothesis that some vesicle diaphragms act as preferential attractors for anionic macromolecules.
  • (20) The solutions to this high-dimensional system of ODEs suffice to simulate the chaotic patterns of the EEG, including the normal low-level background activity, the high-level relatively coherent "bursts" of oscillation that accompany reception of input to the bulb, and a degenerate state of an epileptic seizure determined by a toroidal chaotic attractor.

Magnet


Definition:

  • (n.) The loadstone; a species of iron ore (the ferrosoferric or magnetic ore, Fe3O4) which has the property of attracting iron and some of its ores, and, when freely suspended, of pointing to the poles; -- called also natural magnet.
  • (n.) A bar or mass of steel or iron to which the peculiar properties of the loadstone have been imparted; -- called, in distinction from the loadstone, an artificial magnet.

Example Sentences:

  • (1) By presenting the case history of a man who successively developed facial and trigeminal neural dysfunction after Mohs chemosurgery of a PCSCC, this paper documents histologically the occurrence of such neural invasion, and illustrates the utility of gadolinium-enhanced magnetic resonance scanning in patient management.
  • (2) The tumors were identified by magnetic resonance (MR) imaging.
  • (3) Twenty patients with non-small cell bronchogenic carcinoma were prospectively studied for intrathoracic lymphadenopathy using computed tomography (CT) and magnetic resonance imaging (MRI).
  • (4) The role of magnetic resonance imaging is also discussed, as is the pathophysiology, management, and prognosis in the elderly patient.
  • (5) An innovative magnetic resonance imaging technique was applied to the measurement of blood flow in the abdominal aorta.
  • (6) Sequelae of chemo- and radiotherapy were only depicted by magnetic resonance imaging.
  • (7) Magnetic polyethyleneimine (PEI) microcapsules have been developed for trapping electrophilic intermediates in the gastrointestinal (GI) tract.
  • (8) Our data support the hypothesis that evoked and epileptiform magnetic fields result from intradendritic currents oriented perpendicular to the cortical surface.
  • (9) We conclude that exposure for 20 min to a 1.5-T static magnetic field does not alter body and skin temperatures in man.
  • (10) Magnetic resonance imaging of the spinal cord clearly demonstrated the entire lesion.
  • (11) Right ventricular volumes were determined in 12 patients with different levels of right and left ventricular function by magnetic resonance imaging (MRI) using an ECG gated multisection technique in planes perpendicular to the diastolic position of the interventricular septum.
  • (12) In April 1986, magnetic resonance imaging (MRI) of the thorax and shoulder girdle was presented to the 99th Annual Meeting of the American Association of Anatomists.
  • (13) In addition, a 31P nuclear magnetic resonance (NMR) technique was applied to investigate the in vivo energy metabolism of the graft.
  • (14) Line broadening detected in several of the high-field nuclear magnetic resonance spectra was attributed to cis-trans isomerization.
  • (15) The correlation of posterior intervertebral (facet) joint tropism (asymmetry), degenerative facet disease, and intervertebral disc disease was reviewed in a retrospective study of magnetic resonance images of the lumbar spine from 100 patients with complaints of low back pain and sciatica.
  • (16) In this critical review of human in vivo nuclear magnetic resonance (NMR) spectroscopy, the questions of which chemical species can be detected and with what sensitivity, their biochemical significance, and their potential clinical value are addressed.
  • (17) The location of the internal trans and cis isoprene units in ficaprenol-11 isolated from Ficus elastica was determined by 13C nuclear magnetic resonance.
  • (18) Using sterile conditions, antibodies to G were incubated with a suspension of transformed cells at 4 degrees C, unbound antibodies were then removed, and the cells were incubated with the immunoabsorbent (3 micron magnetic beads; J. Ugelstad et al.
  • (19) The EMD was miniaturized by using rare earth magnets in the construction of both external transmitter and internal receiver.
  • (20) We present three patients in whom the diagnosis of intranasal meningoencephalocele was made by magnetic resonance imaging.

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