Dynamical generator

In the mid and late 1990s CAS developed the ChemPort module as a linked gateway to primary literature. The CAS online delivery clients arc able to move into CbemPort to display primaiy literature by presenting stored or dynamically generated URLs to ChemPort. Conversely, ChemPort will link a user to SciFinder to provide access to the CAS databases. 

An alternative model has been proposed in which the chiral mobile-phase additive is thought to modify the conventional, achiral stationary phase in situ thus, dynamically generating a chiral stationary phase. In this case, the enantioseparation is governed by the differences in the association between the enantiomers and the chiral selector in the stationary phase. 

B. Bergersen, Z. Racz. Dynamical generation of long-range interactions Random Levy flights in the kinetic Ising and spherical models. Phys Rev Lett 67 3047-3050, 1991. 

The solid lines in Figure 4.5 represent extrapolations of experimental data to full-scale vessel bursts on the basis of dimensional arguments. Attendant overpressures were computed by the similarity solution for the gas dynamics generated by steady flames according to Kuhl et al. (1973). Overpressure effects in the environment were determined assuming acoustic decay. The dimensional arguments used to scale up the turbulent flame speed, based on an expression by Damkohler (1940), are, however, questionable. 

Kaplunovsky and Weinstein [kaplu85j develop a field-theoretic formalism that treats the topology and dimension of the spacetime continuum as dynamically generated variables. Dimensionality is introduced out of the characteristic behavior of the energy spectrum of a system of a large number of coupled oscillators. 

Another approach used to automate the randomization process is by embedding pregenerated randomization lists in the data collection and management system. The main disadvantage of this approach is the security of the randomization lists. This can be remedied by having the system dynamically generate randomization numbers. 

There are two issues that may be confusing in the development above. The first issue, which applies to any/(H), including simply/(H) = H, is how to obtain correct scattering dynamics information if only the real part of the wave packet is available. The second issue is the relation of the wave packet dynamics generated by the/(H) of choice in the RWP method, Eq. (16), to standard wave packet dynamics generated by H. That is, can % u) be related to T(f) in a more explicit manner than in the discussion revolving around Eqs. (13) and (14) ... 

The propagator exp(/ x) on the left-hand side reflects the dynamics generated by the Liouville operator,... 

The classical motion corresponding to the quantum dynamics generated by the Dirac-Hamiltonian (2) can most conveniently be obtained by considering the limit h — 0 in the Heisenberg picture Consider an operator B that is a Weyl quantisation of some symbol (see (Dimassi and Sjostrand, 1999))... 

Quants can be dynamically generated, split, combined or deleted. This process is called quant generation. 

We have seen that the quark mass dependence of ferromagnetism should be important, while we have treated it as an input parameter. When we consider the realization of chiral symmetry in QCD, the quark mass should be dynamically generated as a result of the vacuum superconductivity qq pairs are condensed in the vacuum. We consider here SU(2)l x SU(2)r symmetry. Then Lagrangian should be globally invariant under the operation of any group element with constant parameters, except the symmetry-breaking term... 

Here, for notational convenience, we have assumed that Vnm = We would like to emphasize that the mapping to the continuous Hamiltonian (88) does not involve any approximation, but merely represents the discrete Hamiltonian (1) in an extended Hilbert space. The quantum dynamics generated by both Hamilton operators is thus equivalent. The Hamiltonian (88) describes a general vibronically coupled molecular system, whereby both electronic and nuclear DoF are represented by continuous variables. Contrary to Eq. (1), the quantum-mechanical system described by Eq. (88) therefore has a well-defined classical analog. 

Hue, I. Lehn, J. M. Virtual combinatorial libraries Dynamic generation of molecular and supramolecular diversity by self-assembly. Proc. Natl. Acad. Sci. U.S.A. 1997,94,2106-2110. 

Test atmospheres of known concentration of the pesticide in air were dynamically generated at levels of twice, one-half, and at the OSHA standard for the specific pesticide. 

A clever means of dynamic generation of standards at the part-per-million level involves permeation through a polymer. In 1966 O Keeffe and Ortman (34) described this technique primarily for air pollution standards. A condensable gas or vapor is sealed as a liquid in a Teflon tube under its saturation vapor pressure as shown in Figure 4.14. After an initial equilibration period the vapor permeates through the tube wall at a constant rate. This rate is determined by weight loss over a period of time. Temperature must be controlled to within .0.1°C to maintain 1% accuracy. In use the tube is thermostatted in a chamber that permits a diluent gas to fully flush the chamber. The concentration is then determined by the same equation used for diffusion tubes. However, since the rate is generally much less in permeation tubes it is usually reported in ng/min. 

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