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Swaps extendable

The need for weU-trained technical service professionals is expected to continue as an essential aspect of the chemical industry, despite the phenomenal growth ia electronic methods of information storage, retrieval, and transmission. Advanced troubleshooting of complex customer processes and accelerated accurate product development and market introductions should continue to be principal elements of technical service personnel duties. Increased levels of integration, perhaps blurring the lines between suppHer and customer, may come to pass. There are already instances of personnel swapping between customers and suppHers for extended periods to allow cross-fertilization of ideas and provide more accurate perspectives for the companies involved in these efforts. Technical service and research personnel have been those persons most directly involved in such efforts. [Pg.381]

The rationale of using hybrid simulation here is that a classic diffusion-adsorption type of model, Eq. (2), can efficiently handle large distances between steps by a finite difference coarse discretization in space. As often happens in hybrid simulations, an explicit, forward discretization in time was employed. On the other hand, KMC can properly handle thermal fluctuations at the steps, i.e., provide suitable boundary conditions to the continuum model. Initial simulations were done in (1 + 1) dimensions [a pseudo-2D KMC and a ID version of Eq. (2)] and subsequently extended to (2 + 1) dimensions [a pseudo-3D KMC and a 2D version of Eq. (2)] (Schulze, 2004 Schulze et al., 2003). Again, the term pseudo is used as above to imply the SOS approximation. Speedup up to a factor of 5 was reported in comparison with KMC (Schulze, 2004), which while important, is not as dramatic, at least for the conditions studied. As pointed out by Schulze, one would expect improved speedup, as the separation between steps increases while the KMC region remains relatively fixed in size. At the same time, implementation is definitely complex because it involves swapping a microscopic KMC cell with continuum model cells as the steps move on the surface of a growing film. [Pg.22]

Architecture-altering operations are used to extend the scope of GP by providing a means by which branches and arguments within the parse trees may be created or deleted. Permutation, which swaps characters in a tree, and editing, which involves the optimisation of long expressions, are also commonly used. [Pg.31]

Mutational errors can extend to include more than just one base of a chromosome. Humans normally have 23 pairs of chromosomes. But mutations can produce a fetus that has an extra copy or copies of a chromosome. The unique physical appearance and retarded mental faculties associated with Down syndrome arise when three copies of chromosome 21 are present. Another type of chromosomal mutation occurs when portions of two adjacent chromosomes swap places with each other. Such a translocation mutation between chromosomes 9 and 22 lead to a certain type of leukemia. [Pg.474]

An alternative to these extended ensembles for the simulation of frustrated magnets is the parallel tempering or replica exchange Monte Carlo method [22-25], Instead of performing a single simulation at a fixed temperature, simulations are performed for M replicas at a set of temperatures Ti,T2,. .., Tm- In addition to standard Monte Carlo updates at a fixed temperature, exchange moves are proposed to swap two replicas between adjacent temperatures. These swaps are accepted with a probability... [Pg.608]

A swap of the blend component stained with deuterium results in the interrelated changes in surface %s and bulk % interaction parameter. The model presented above accounts for this relation, using the solubility parameter formalism introduced in Sect. 2.2.3. Large magnitudes of the swapping effect for bulk and, hence, surface interactions observed in 66/52 and 86/75 blend pairs lead to the observed disparity in surface phase behavior noticed within each pair (see Fig. 28). Extended critical point wetting region is concluded for d66/h52 and d86/h75 mixtures with (-%s) >0.014, while its very drastic reduction is concluded for the blends with swapped isotope labeled component, i.e., for h66/d52 and... [Pg.66]

In the examples described above, most swapping of extender unit specificity was achieved by substitution of AT domains within modules. In most of the cases where entire domains were replaced, the hybrid PKS exhibited attenuated catalytic activity, potentially due to perturbation of the PKS tertiary and quaternary structure. In an effort to minimize these perturbations, a recent study swapped AT domain specificity by using a stand-alone AT to transacylate the AGP of a module whose own AT is inactive. Kumar et al. [85] produced a DEBS module 6 AT null mutant... [Pg.1818]

Since the stracture of the side chain at a given site in the polyketide chain is determined by the structure of the extender unit incorporated at the corresponding site in the nascent chain, changes in the side chains that appear in the final product will result from replacement of one extender unit for another. Because the AT domains determine the nature of the cognate extender unit incorporated (described in Section 111), AT swapping results in corresponding side-chain changes. [Pg.320]

The two previous chapters introduced and described a fractiOTi of the most important research into interest-rate models that has been carried out since the first model, presented by Oldrich Vasicek, appeared in 1977. These models can be used to price derivative seciuities, and equitibrium models can be used to assess fair value in the bond market. Before this can take place however, a model must be fitted to the yield curve, or calibrated In practice, this is carried out in two ways the most popular approach involves calibrating the model against market interest rates given by instruments such as cash Libor deposits, futures, swaps and bonds. The alternative method is to model the yield curve from the market rates and then calibrate the model to this fitted yield curve. The first approach is common when using, for example extended Vasicek... [Pg.85]

Extendible swaps—which can be extended by one party beyond the scheduled termination date. In this case, the party with this ability may choose to extend a 3-year swap to five years if they were the fixed-rate payer, and rates had risen substantially. [Pg.547]

Swaps may also be extendable or putable. In an extendable swap, one of the parties has the right, but not the obligation, to extend the life of the swap beyond the fixed maturity date. In a putable swap, one party has the right to terminate the swap ahead of the specified maturity date. The fixed rate would be adjusted to reflect the cost of the implicit option. For example, if the fixed payer has the right to extend the swap, the fixed rate would be higher than for a plain vanilla swap with similar terms. [Pg.120]


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See also in sourсe #XX -- [ Pg.146 , Pg.147 ]




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