Progressive profiling

On Mark, see H.F. Mark, "Polymer chemistry in Europe and America - how it all began, Journal for Chemical Education 58 (1981) 527-534 id., From Small Organic Molecules to Large A Century of Progress, Profiles, Pathways, and Dreams Autobiographies of Eminent Chemists (Washington, D.C. American Chemical Society, 1993) ... 

Some factors or covariates may cause deviations from the population typical value generated from system models so that each individual patient may have different PK/PD/disease progression profiles. The relevant covariate effects on drug/disease model parameters are identified in the model development process. Clinical trial simulations should make use of input/output models incorporating... 

Wright et al. (1995), based on studies of rhizogenic palaeosol calcrete profiles from southern Europe, proposed the rhizogenic model (Figure 2.7C). In Mesozoic palaeosols from northern Spain, they identified progressive profile development by calcified root mats from a few isolated laminar levels to thick (>2m) dense carbonate sheets. In early Cenozoic successions in southern France they noted stages of development from scattered Microcodium remains to entire sheets composed almost wholly of this component. 

U.S. Environmental Protection Agency, Superfund site progress profile Tar Creek (Ottawa County), Oklahoma. , February 2010. 

If you have a marketing automation tool, you can often implement progressive profiling. Progressive profiling allows you to collect information and build qualification over time. Each time a person fills out a form on your site, the progressive form asks for new and different information. 

As a best practice, only ask for what you really need. And if you have marketing automation, you can employ progressive profiling. That way, your website can intelligently know what information your visitor already filled out. For instance, if he already gave you his name, email address, and title, this information Ccm be retained in your marketing automation system. The next time he fills out a form, you can ask for company, industry, phone number, and so on. 

In the preceding section, the choice of reactor type was made on the basis of which gave the most appropriate concentration profile as the reaction progressed in order to minimize volume for single reactions or maximize selectivity for multiple reactions for a given conversion. However, after making the decision to choose one type of reactor or another, there are still important concentration effects to be considered. 

Gas is produced to surface separators which are used to extract the heavier ends of the mixture (typically the components). The dry gas is then compressed and reinjected into the reservoir to maintain the pressure above the dew point. As the recycling progresses the reservoir composition becomes leaner (less heavy components), until eventually it is not economic to separate and compress the dry gas, at which point the reservoir pressure is blown down as for a wet gas reservoir. The sales profile for a recycling scheme consists of early sales of condensate liquids and delayed sale of gas. An alternative method of keeping the reservoir above the dew point but avoiding the deferred gas sales is by water injection. 

To derive the concentration profile for progressive freezing, a material balance is employed for solidification of a small fraction dg of melt, as shown in Figure 1. Integration from the beginning of solidification gives (1,4,8) ... 

Fig. 3. Impurity concentration profiles resulting from progressive freezing with different values of distribution coefficient k (from eq. 2).

The following also diseusses autothermal reaetors, the eonversion of ammonia, and finally, the optimum-temperature progression, with derived equations for reversible exothermie reaetions for whieh profiles are not readily available. 

The following derives equations for the optimum temperature progression for the four types of reaetions previously deseribed at eonstant density. Figures 6-28, 6-29, 6-30, and 6-31 show that the r - T - profile for an exothermie reaetion is unimodal. Therefore, the optimum temperature T p is obtained by performing a partial differentiation of (-r ) with respeet to temperature T at a eonstant eonversion and equating this to zero. That is. 

The Microsoft Excel Spreadsheet (OPTIMUM63.xls) was used to evaluate T p for varying values of X. Table 6-12 gives the results of the spreadsheet calculation, and Figure 6-34 illustrates the profile of Tgp( against X, showing that the optimum temperature progression decreases as the fractional conversion increases. 

Omoleye, J. A., Adesina, A. A., and Udegbunam, E. O., Optimal design of nonisothermal reactors Derivation of equations for the rate-temperature conversion profile and the optimum temperature progression for a general class of reversible reactions, Chem. Eng. Comm., Vol. 79, pp. 95-107, 1989. 

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