Passive conservation

Lee D and Albrecht A C 1993 On global energy conservation in nonlinear light matter interaction the nonlinear spectroscopies, active and passive Adv. Phys. Chem. 83 43-87... 

EMGRESP is overly conservative for passive gas dispersion applications. No time-varying releases may be modeled. Dense gas dispersion may be computed for only "instantaneous" releases conditions. 

Illustration Aggregation of area-conserving clusters in two dimensional chaotic flows. Particles, converted passively in a two-dimensional chaotic flow, aggregate on contact to form clusters. The capture radius of the clusters increases with the size of the cluster. Since these simulations are in two dimensions, the area of the aggregating clusters is conserved. 

The conservatives Passive reaction, Most likely to behave Short or long term,... 

The problem of an unphysical flow of ZPE is not a specific feature of the mapping approach, but represents a general flaw of quasi-classical trajectory methods. Numerous approaches have been proposed to fix the ZPE problem [223]. They include a variety of active methods [i.e., the flow of ZPE is controlled and (if necessary) manipulated during the course of individual trajectories] and several passive methods that, for example, discard trajectories not satisfying predefined criteria. However, most of these techniques share the problem that they manipulate individual trajectories, whereas the conservation of ZPE should correspond to a virtue of the ensemble average of trajectories. 

As described above, histones are much more than passive structural players within chromatin. Dynamic post-translational modifications of these proteins confer specialized chemical proprieties to chromatin of both informational and structural nature with important functional implications. The highly conserved sites for acetylation, methylation, phosphorylation, ADP-ribosylation, and ubiquitination events on histone tails appear to orchestrate functional activities that range from transcriptional activation and repression to DNA repair and recombination. 

Fig. 5.10 State of lead coins after different conservation conditions (a) coin protected by a passive surface (b) coin with corrosion localized on protruding features (c) coin nearly disintegrated due to corrosive attack (courtesy Societe Archeologique de Namur, from [267])...

The most important function of the proximal tubular cell is the conservation of filtered Na+ and the reabsorption of water. The PCT is also the main site of FICO-3 reabsorption. This is achieved by the transfer of Na+ and FICO-3 from the tubular lumen into the cell and then into the extracellular fluid (ECF) accompanied by the passive reabsorption of approximately 70% of the filtered water via the tight junctions between the tubular cells. The presence of the enzyme carbonic anhydrase in the cytoplasm and luminal epithelium of the cells of the PCT allows the kidney to eliminate FI+ while simultaneously retaining FICO-3. 

Figure 3 Schematic diagrams of prototypes of gas-surface interactions as can be probed by molecular beams, presented as side views of the surface atoms or cubes. (A) molecular scattering in which parallel momentum is conserved and die surface is represented by hard cubes. (B) molecular scattering from individual surface atoms. (C) molecular scattering in the presence of a strong chemisorption well. (D) molecular scattering for a partially passivated surface, containing specific sites where chemisorption is possible. Note that in this case the interaction is also strongly orientation dependent. From Ref. [1].

Body itself is merely passive, and needed some other principle to move it and now that it is in motion, it needs some other principle for conserving that motion. By the tenacity of fluids, the attrition of their parts, and the weakness of elasticity in solids, the motion which we find in the world, is always dwindling and on the decay so that there arises a necessity of recruiting it by active principles Such are the cause of gravity (...) and such the cause of fermentation, by which the heart and blood of animals are kept in perpetual motion, the inward parts of the earth are constantly warm d, bodies bum and shine, mountains take fire, caverns blown up, c. For we see but little motion in the world, beside what is owing to these active principles And were it not for these, the bodies of the earth, planets, comets, sun, and all things in them, would grow cold, and freeze, and become unactive masses. ... 

The cascade concepts may be applied to intensities of scalar fields as well as to the turbulent kinetic energy. Passive scalars (those that do not influence the velocity field) in the absence of chemical reactions can experience spectral transfers as a consequence of the convective terms in their conservation equations, and an inertial-convective subrange can exist in which the integrand of equation (26) exhibits a power-law dependence on k analogous to that of e(k) [66]. The average rate of scalar dissipation,... 

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