Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Existence values

Another part of the debate concern a more philosophical approach, it discusses if passive use values or existence values should be included in economic analysis. The more traditional view emphasizes the necessity for a good to be physical or at least observable in order to get utility from buying it. In the non-use values, consumers get utility from a good without utilizing it physically. According to Diamond and Hausman [26], the CV method should not be used in CBA or damage assessment. They argue that WTP estimates from the CV method are not measurements of... [Pg.122]

The linear and nonlinear optical properties of one-dimensional conjugated polymers contain a wealth of information closely related to the structure and dynamics of the ir-electron distribution and to their interaction with the lattice distorsions. The existing values of the nonlinear susceptibilities indicate that these materials are strong candidates for nonlinear optical devices in different applications. However their time response may be limited by the diffusion time of intrinsic conjugation defects and the electron-phonon coupling. Since these defects arise from competition of resonant chemical structures the possible remedy is to control this competition without affecting the delocalization. The understanding of the polymerisation process is consequently essential. [Pg.183]

Thermodynamic data on amphibole end-members are mostly derived from phase equilibria, because of the difficulty of synthesizing pure components for direct calorimetric investigation. Table 5.49 lists existing values for some pure components. Most data come from the internally consistent set of Holland and Powell... [Pg.311]

Our first TRPD study, on chlorobenzene ion, concerned a system where the rate-energy curve from PEPICO was well established, and the point of this work was to confirm that TRPD results were consistent with expectations. Most of our subsequent TRPD work has resulted in new thermochemical information, or in major strengthening of existing values, and will be worth discussing here from a specifically thermochemical point of view. [Pg.96]

The Z values of the solid material often deviate from those of a coating. Thin coatings are very sensitive to process parameters, especially in a sputter environment. As a result, the existing values for solid material are not adequate. [Pg.129]

Since pollution prevention first entered the environmental lexicon in the 1980s, it has become a touchstone of U.S. environmental policy. To succeed, pollution prevention programs need sustained top management support and defined links to the company s core business activities. Equally important, the values represented in the program must fit with the academic institution, company, or individual s existing values. For example, syntheses that minimize wastes are environmentally Mendly and may provide quality improvements and cost and energy savings. Environmental consciousness should be incorporated early into chemical research (Lnnt and Bowen, 1996). [Pg.48]

Even where such specific differences of interpretation do not necessarily apply, serious disagreements exist. Values ranging from 177 to 220 kbar have been quoted... [Pg.22]

The other interesting fact is that stable gas plus vapor bubbles can exist in a liquid which is below its boiling point. Thus in Eq. (60) for given values of pl and R there exist values of p which are great enough so that pv may be quite small. Thus bubbles of air plus steam appear in water boiling at temperatures below 212° F. at atmospheric pressure. This occurrence is well known to observers who heat liquids in open-top or transparent vessels. [Pg.39]

Let us give accurate definitions. Let c(t, k, c0) be a solution for eqn. (73) which satisfies the initial condition c(i0) = c0- This solution is called stable (according to Lyapunov) if for any infinitesimal e > 0 there exists values of 5 > 0 such that the inequality... [Pg.32]

Since rest points are particular cases of the phase trajectories < ( , k, < ) = c0, the above definitions of stability according to Lyapunov are also valid for them. A rest point is stable according to Lyapunov if, for any e > 0 there exists values of 3 > 0 such that after a deviation from this point within 3, the system remains close to it (within the value) for a long period of time. A rest point is asymptotically stable if it is stable according to Lyapunov and there exists values of S > 0 such that after the deviation from this point within 3 the system tends to approach it at t - oo. [Pg.32]

Duerksen and Hamielec (26) collated much of the literature data on the energy of activation for the thermal initiation of stryene in bulk or solution which was available in 1968 and concluded that the value of 115 kJ mol l derived from experiments in a Continuous Stirred Tank Reactor was concordant with the existing values which they quoted. Recent work by Bengough et al. (27, 28) gives values of 121 and 118 kJ mol l supporting the median value of 115 kJ mol . ... [Pg.475]

The following steps are simple updates of the appropriate tables. Once tables are created or modified, updating the whole database to reflect these changes is a matter of minutes, thanks to a couple of scripts. It is important to note that the updates concern only the addition of new data, thanks to new data structures. It does not imply changing some existing values in certain tables. If that was the case, adding new meta data could lead to update anomaly problems. [Pg.251]

Using a microwave cavity in the free magnetic field region downstream of the Si02 target, the hfs transition Av = 4 463 MHz in n=l state muonium was observed.17 Because of the Doppler effect it does not appear that this type of observation can lead to a high precision determination of Av, competitive with the existing value. [Pg.983]

Values in italics are for ecoregions where no sample exists values are based on the mean in sampled plots for the same vegetation type in other states. Source Fearnside, nd-a. ... [Pg.176]

Similarly, there exist values a" and a " within [0,1], such that... [Pg.147]

If you find it is necessary to modify the Registry, you can modify the values in the database, or can even create new entries or keys. You will find the options for adding a new element to the Registry under the Edit menu. To edit an existing value, simply double-click the entry and modify it as needed. On Windows 2000 systems, you will need administrative-level access to modify the Registry. [Pg.510]

Interval values, describing ranges of operating conditions, are dynamically redefined whenever a condition is found to exceed the existing value range (values may be exceeded in the positive or negative direction). [Pg.214]

The Miller and Menz(18) argument is appealing however, there are additional ways of analytically motivating existence values. [Pg.376]

It seems reasonable that planners in North American democracies need not respect individual beliefs about future possibilities in the same manner as they respect individual tastes. Tastes may be refined or vulgar still, it may be held that a person s tastes must be respected. Beliefs, however, can be wrong and it may be very costly to correct them. In these circumstances, a planner might make decisions about Q-goods on this basis of his expectations of the individual s ex post utility level. Existence value would then be the planner s perception of differences in the individual s ex post utility level, where the planner s ex ante beliefs have been substituted for the individual s. The usual economic efficiency (Pareto optimality) conditions would still apply. The danger of paternalism in which the planner substitutes his own tastes for those of the individual is acknowledged. In addition, account would have to be taken of the accuracy and precision of the planner s knowledge of world states and the individual s tastes. [Pg.381]

The rule assigns a value to the specified action, eventually overriding an existing value. [Pg.264]


See other pages where Existence values is mentioned: [Pg.845]    [Pg.645]    [Pg.118]    [Pg.122]    [Pg.256]    [Pg.8]    [Pg.253]    [Pg.300]    [Pg.423]    [Pg.519]    [Pg.203]    [Pg.216]    [Pg.68]    [Pg.588]    [Pg.12]    [Pg.669]    [Pg.878]    [Pg.255]    [Pg.83]    [Pg.673]    [Pg.61]    [Pg.376]    [Pg.376]    [Pg.380]    [Pg.381]    [Pg.381]    [Pg.474]   


SEARCH



© 2024 chempedia.info