The physical design relates to the actual input and output processes of the system. In physical design, the following requirements about the system are decided.
Put another way, the physical portion of system design can generally be broken down into three sub-tasks:. User Interface Design is concerned with how users add information to the system and with how the system presents information back to them. Data Design is concerned with how the data is represented and stored within the system. At the end of the system design phase, documentation describing the three sub-tasks is produced and made available for use in the next phase.
Physical design, in this context, does not refer to the tangible physical design of an information system. To use an analogy, a personal computer's physical design involves input via a keyboard, processing within the CPU, and output via a monitor, printer, etc. It involves a detailed design of a user and a product database structure processor and a control processor.http://dev.vankaarstotservet.nl/map.php
Rapid application development RAD is a methodology in which a system designer produces prototypes for an end-user. The end-user reviews the prototype, and offers feedback on its suitability. This process is repeated until the end-user is satisfied with the final system. Joint application design JAD is a methodology which evolved from RAD, in which a system designer consults with a group consisting of the following parties:. JAD involves a number of stages, in which the group collectively develops an agreed pattern for the design and implementation of the system.
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Electrical & Computer Engineering (ECE) < North Dakota State University
Highlights include a comparison of different design approaches, over illustrations, and a multitude of detailed logic design examples. Help Centre.
My Wishlist Sign In Join. Be the first to write a review. Add to Wishlist. Ships in 7 to 10 business days. Link Either by signing into your account or linking your membership details before your order is placed. Description Table of Contents Product Details Click on the cover image above to read some pages of this book! All Rights Reserved. In Stock. National Center for Biotechnology Information , U.
Journal List Chem Sci v. Chem Sci. Published online Jan 8. Author information Article notes Copyright and License information Disclaimer. Corresponding author. Received Dec 11; Accepted Jan 5. This article is freely available.
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Abstract The integration of multiple DNA logic gates on a universal platform to implement advance logic functions is a critical challenge for DNA computing. Introduction To fulfil the demands of increased computational complexity, it is critical to integrate multiple logic gates into advanced logic circuits on a universal platform for the next generation of molecular computing. Result and discussion DNA-AgNCs were designed as a universal platform for the construction of multiple advanced logic gates, which contained two segments: a cytosine-rich C-rich segment for synthesizing AgNCs and an input-recognizing segment.
Open in a separate window. A The principle scheme of the developed half adder and the corresponding logic circuit. The corresponding truth table D and photographs of the half adder under UV irradiation E. A The operation principle of the developed half subtractor and the corresponding logic circuit. The corresponding truth table D and photographs of the half subtractor under UV irradiation E.
A The operation principle of the developed demultiplexer and the corresponding logic circuit. The corresponding truth table D and photographs of the demultiplexer under UV irradiation E.
Infographics: Digital Logic Gates
A The principle scheme of the developed multiplexer and the corresponding logic circuit. The corresponding truth table D and photographs of the multiplexer under UV irradiation E. The principle scheme of the multiplexer-controlled intelligent detection of pathogenic bacterial genes. In the absence of selector DNA, the multiplexer would transfer the S. In the presence of selector DNA, the multiplexer would transfer the E. B Fluorescence intensity of the multiplexer at FI max against S. Table 1 Multiplexer-based biosensing system for the rapid analysis of pathogenic genes.
Conclusions We have successfully developed a novel strategy for the wireless integration of DNA logic gates into a simple and universal platform to implement multiple advanced arithmetic and non-arithmetic logic functions. Conflicts of interest The authors declare no competing financial interests.
Supplementary Material Supplementary information Click here for additional data file. See DOI: References Macdonald J. Nano Lett. ACS Nano.
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