What's the difference between anharmonic and enharmonic?
Anharmonic
Definition:
(a.) Not harmonic.
Example Sentences:
(1) The temperature dependence showed that the anharmonic contribution to the atomic-temperature factor for Si and Ge is extremely weak in the temperature range 300 approximately 1078 K. On the contrary, the B factors obtained from the measured critical voltages for Al, Cu, and Fe varied nonlinearly with temperature, suggesting the importance of the anharmonic effect in the vibration of atoms.
(2) The atoms with the largest anharmonicities tend to have pdfs with multiple peaks, each of which is close to harmonic.
(3) In addition, anharmonicity, multiple minima and conformational transitions are treated explicitly.
(4) DNA behaves as coupled, nonlinear torsional pendulums under superhelical stress, and the anharmonic term in the Hamiltonian is approximately 15 percent for root-mean-square fluctuations in twist at room temperature.
(5) The calculated temperature-dependence and anharmonicity of the Z-DNA helix are compared with the results observed for proteins.
(6) Molecular dynamics simulations over a range of temperatures also exhibit a transition at about 220 K: high-temperature atomic fluctuations are dominated by anharmonic collective motions of bonded and nonbonded groups of atoms, but below 220 K the predominant dynamic behaviour is harmonic vibration of individual atoms.
(7) The anharmonicity is large at all temperatures, with a gradual monotonic increase from 0.5 at 20 K to greater than 0.7 at 340 K without a noticeable change at the glass transition temperature.
(8) The effect of intrinsic anharmonic vibration should be considered for reproducing the results for Al and Cu.
(9) This method yields an ensemble of structures in which all possible thermal motions are allowed, that is, in additional to isotropic distributions, anisotropic and anharmonic positional distributions occur as well.
(10) This masks the possible anharmonic behavior of the conformational modes.
(11) Statistical anharmonic thermal motion formalisms should only be used for X-ray data analysis in combination with a formalism accounting for the effect of bonding on the atomic charge density.
(12) Above the transition temperature, the atomic fluctuations exhibit both harmonic and anharmonic behavior.
(13) The observed temperature dependence of the critical voltages for the metals were compared with calculations based on harmonic, quasi-harmonic, and anharmonic approximations.
(14) The delocalized pi electron cloud of the porphyrin ring is coupled not only to the high frequency vibrational modes of the active site but also to a "bath" of lower frequency modes that involve the entire protein; moreover at suitable temperatures (approximately 200 K), anharmonic motions, which are an obvious prerequisite for the jumping among different conformational substates, become evident.
(15) Lattice sites which have a proper or improper subgroup of 222 as the site group may exhibit an anharmonic twisted local potential.
(16) If the twist axis is fixed by symmetry considerations the approximation used needs, in addition to three harmonic parameters, one anharmonicity parameter, essentially the local pitch.
(17) Depending on the degree of bond bending, the anharmonicity of the bond may be diminished, eliminated, or even reversed.
(18) Most atoms are found to have motions that are highly anisotropic but only slightly anharmonic.
(19) There are at least four major possible strategies: (i) a metric strategy, as initially proposed by Julesz; (ii) a projective strategy based on the law of invariance of the anharmonic ratio and Desargue's theorem; (iii) a perspective strategy discussed in relation to the homology relationships between vanishing points and in relation to physiological studies on cells of visual cortex; and (iv) a more dynamic strategy based upon the geometric properties of the Zöllner illusion.
(20) The anharmonicity is reflected by changes in the direction of the normal modes as a function of the energy and by the existence of multiple free energy minima for the helices packing.