Graphical entry system display

All process simulators use graphical user interfaces to display the flowsheet and facilitate the input of information to the package. The entry of data is usually intuitive to anyone familiar with the MS Windows operating systems. 

Entry of Structures and Substructures. The main data input to the ADAPT system is chemical structures along with the relevant biological or physicochemical property. Structures are entered by sketching on the CRT screen of a graphics display terminal. 

As we select the relevant entry in the tree, the possible commands are shown in the lower part of the toolbox, that is, project-systems-system. The command tab line now shows the possible commands, for example, show, add, and delete. As we wantto add a molecule, we select the add tab. A subtab within the add command now displays the items that can be added, that is, forceJidd, molecule, and view. On selecting the molecule tab by clicking with the mouse, we can set important parameters for the molecule in a subtab, for example, the name of the molecule write Co(III)(NH3)6. On the lower right side of the toolbox, we can now proceed by selecting the confirm button. The molecule is added, and an empty molecule view for [Co(NH3)6] is automatically added to the graphics area. 

Entry of Molecular Structures. The ADAPT system has as one of its components all the modules necessary to enter, modify, retrieve, and draw molecular structures of organic molecules. This portion of ADAPT has been operational for several years and has been employed in several published studies. The routines allow the convenient, interactive entry of structures by sketching them on the screen of a graphics display terminal. This can be done in thirty seconds to several minutes per compound, depending on structural complexity. No special techniques beyond those used in sketching molecular structures on a blackboard are needed. Thus, structure files on the order of hundreds of compounds can be entered into ADAPT in reasonable amounts of time. The structure files are stored permanently on disc files for further processing by the other modules of ADAPT. Information saved for each compound includes a compressed connection table, ring information, a list of associated numerical... 

As computers became more plentiful and more powerful, design entry tools and design visualization tools became available. Text editors and timesharing systems enabled a user to edit the SPICE description as a text file and interactively simulate the circuit. The introduction of graphic display terminals and output devices such as low-cost plotters enabled the Simula-tion results to be displayed in a visual and hence easier to comprehend manner. Even today, nearly 30 years on, SPICE and variants of SPICE are still widely used in the simulation process. 

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