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Fitness, increase

Appears suddenly at or above rotor critical speed when critical is below one-half operating speed. Increasing speed increases vibration amplitude, blit whirl frequency remains constant. When speed IS decreased, vibration disappears below where it first appeared. Fnction-indnced rotor whirl Encountered m bnilt-np rotors or rotors with shrink fits or rotor disassembly to inspect fits, increase shrink fits Coupling friction has been known to induce whirl... [Pg.423]

Advanced materials are of paramount importance for the future of the electronics industry. Remarkable progress has been made in fitting increasingly greater numbers of components into an integrated circuit. This is illustrated by the often-shown electronic device density versus time semilogarithmic plot (Fig. 3) [30], as well as by the notebook computer, alluded to earlier. The... [Pg.5]

Fig. 18. Distribution of fitnesses as a function of mutant Hamming distance from current position on the landscape for an initial fitness of (a) 0.5 and (b) 0.543. Simulations were carried out on NK landscapes with N= 100 and K = 2, yielding the high nearest neighbor correlation of 0.97 and a correlation length of 33.3. Vertical bars show +1 and -1 standard deviation from the mean of fitnesses found at each search distance. If the best of six mutants at each distance is chosen, then the best mutant can be found at Hamming distance 33 from the fitness 0.5 point and at decreasing distances as the initial fitness increases. (From Ref. 119.)... Fig. 18. Distribution of fitnesses as a function of mutant Hamming distance from current position on the landscape for an initial fitness of (a) 0.5 and (b) 0.543. Simulations were carried out on NK landscapes with N= 100 and K = 2, yielding the high nearest neighbor correlation of 0.97 and a correlation length of 33.3. Vertical bars show +1 and -1 standard deviation from the mean of fitnesses found at each search distance. If the best of six mutants at each distance is chosen, then the best mutant can be found at Hamming distance 33 from the fitness 0.5 point and at decreasing distances as the initial fitness increases. (From Ref. 119.)...
For the RF PADs only even L terms were nonzero with L < 8 in this fit. Increasing the maximum value of L did not improve the fit to the data, and odd L coefficients were found to converge to zero in the fits, in agreement with the up-down symmetry of the RF PADs. [Pg.565]

The binding of phosphorylcholine does not significantly change the structure of the antibody, yet induced fit plays a role in the formation of many antibody-antigen complexes. A malleable binding site can accommodate many more kinds of ligands than can a rigid one. Thus, induced fit increases the repertoire of antibody specificities. [Pg.1363]

Several attempts to describe replication-mutation networks by stochastic techniques were made in the past. We cannot discuss them in detail here, but we shall brieffy review some general ideas that are relevant for the quasispecies model. The approach that is related closest to our model has been mentioned already [51] the evolutionary process is viewed as a sequence of stepwise increases in the populations mean fitness. Fairly long, quasi-stationary phases are interrupted by short periods of active selection during which the mean fitness increases. The approach towards optimal adaptation to the environment is resolved in a manner that is hierarchical in time. Evolution taking place on the slow time scale represents optimization in the whole of the sequence space. It is broken up into short periods of time within which the quasi-species model applies only locally. During a single evolutionary step only a small part of sequence space is explored by the population. There, the actual distributions of sequences resemble local quasispecies confined to well-defined regions. Error thresholds can be defined locally as well. [Pg.243]

Natural selection will tend to maximize W by increasing the frequency of genotypes with the highest IF) values. R. A. Fisher showed that fitness increases at a rate determined by the variance in fitness among genotypes when fitness is standardized to a mean of 1... [Pg.150]

This is known as Fisher s Fundamental Theorem of Natural Selection. In the absence of perturbations to the population or environment, fitness increases until the best genotypes are fixed and no variance in fitness remains. [Pg.151]

In the Dynamic Light Scattering method (also known as Photon Correlation Spectroscopy), one measures the diffusion of macromolecular chains in solution. The diffusion coefficient is related to the molar mass. The method suffers a number of difficulties. Raw experimental data do not lend themselves to immediate interpretation and must be fitted using a model MMD. Furthermore, D5mamic LS cannot be used to choose between a unimodal MMD and bimodal MMD. In fact data are fitted using a model MMD and the number of parameters to be fitted increases quickly, going from unimodal to bimodal (a bimodal MMD requires finding the best fit of six parameters). [Pg.64]

Water presents the hazard of rapid corrosion organics by reaction with chlorine can produce local hot spots and ultimately cause temperatures above the allowable maximum (Section 9.1.2), which in the case of carbon steel is usually set at 120 C. Oxide layers on the surfaces of equipment, pipes, or fittings increase the amount of water absorbed. This is an exothermic process. The increase in temperature not only increases the rate of corrosion but also can continue beyond the ignition limit. [Pg.1239]

Although modem protein enzymes typically mediate rate accelerations of 10 -10 [15], an early genome would benefit greatly from even a small rate acceleration over non-enzymatic, templated polymerization (see Sect. 9.2.4). A mutant genome whose fitness increased by only a small amount would accumulate tremendous replicative advantage over many generations ... [Pg.276]

Success in the experiment is measured by the rate of solution improvement (fitness increase) compared with problem information discovered, which is Fitness/Information or FI for short. Solution improvement is measured by an objective function in the genetic algorithm. The amount of problem information discovered is measured by the number of solutions evaluated. The improvement due to human interaction is compared to the improvement due to the genetic algorithm as measured by FI. [Pg.156]

Fitness is another way to increase our sense of personal control and optimism. Being physically fit increases our body s ability to cope with the fight-or-flight syndrome discussed earlier. You probably know the basic guidelines for improving fitness, which include stop... [Pg.100]

Urakawa, et al, report the viscosity of polybutadiene solutions and the principal relaxation time for polyisoprene and polyisoprene polybutadiene solutions(9). As seen in Figure 7.6a, p increases nearly exponentially in c, the slope a from a stretched-exponential fit increasing markedly with increasing matrix molecular weight. The corresponding relaxation times, all with near-exponential or stretched-exponential concentration dependences, appear in Figure 7.6b. In constructing this... [Pg.142]

Beyond the graphical evidence, numerical tests demonstrate that the location of the solutionlike-meltlike transition is grounded in these data rather than being arbitrary on moving the transition point from its optimum value the root-mean-square error in the best functional fits increases rapidly. [Pg.366]

Physical fitness Increased fitness increases tolerance to heat stress. [Pg.152]


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See also in sourсe #XX -- [ Pg.6 ]




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