Data processing geometry

The success of SECM methodologies in providing quantitative information on the kinetics of interfacial processes relies on the availability of accurate theoretical models for mass transport and coupled kinetics, to allow the analysis of experimental data. The geometry of SECM is not conducive to exact analytical solution and hence a number of semiana-lytical [40,41], and numerical [8,10,42 46], methods have been introduced for a variety of problems. 

For this type of instrument, particular attention has been given to the prediction of reflections taking account of the SR geometry to allow proper partiality calculations to be made in oscillation camera data processing packages (see section 6.2 and Greenhough and Helliwell (1982b)). 

Works is in progress in the case of "instable" vortices, different geometries,. .. and on improvement of measurement techniques and data processing. 

Even if the flow conditions of liquids on the microscale are almost laminar and therefore numerical simulations with high accuracy are applicable, there are several reasons for the basic necessity for experimental flow visualization. In most cases, for instance, the exact data of geometries and wall conditions of microchannels and data on chemical media such as diffusion coefficients and reaction rates are unknown. Furthermore, in cases of chemical reactions, the interaction between mass transport and conversion are not calculable to date, especially if simultaneous catalytic processes take place. Therefore, the visualization of microscale flow is a helpful tool for understanding and optimizing microchannels. 

Of particular interest to this session is CSAS2, which performs criticaUty safety analyses on multidimensional systems using KENO-IV (Ref. 1). CSAS2 provides for automated data processing and simplified materials input specifications. However, all of the features of the three-dimensional geometry specifications have been reserved as options for the user. A combinatorial geometry version of KENQ, KENO-IV/CG, and a supergroup version, KENO-V, will be incorporated into new analytical sequences of the advanced versions of SCALE. 

New advanced applications of LCs in fiber communications, optical data processing, holography, and other fields, where the traditional rubbing LC alignment is not possible due to the sophisticated geometry of the LC cell and/or high spatial resolution of the processing system. 

The cross relation has proven valuable to estimate ET rates of interest from data tliat might be more readily available for individual reaction partners. Simple application of tire cross-relation is, of course, limited if tire electronic coupling interactions associated with tire self exchange processes are drastically different from tliose for tire cross reaction. This is a particular concern in protein/protein ET reactions where tire coupling may vary drastically as a function of docking geometry. 

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