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NOT logic gate

Fig. 3 Design principle of NOT logic gates with luminescence output and chemical input accordingto photoinduced electron transfer (PET) concepts. Fig. 3 Design principle of NOT logic gates with luminescence output and chemical input accordingto photoinduced electron transfer (PET) concepts.
Another way of designing NOT logic gates is to arrange PET involving the input guest species (Figure 3). Examples from the supramolecular era can be illustrated from publications by Czarnik and Fabbrizzi, with 3 32,33 and 4, 34 35 respectively. [Pg.342]

Again, it is important to note that there are many examples of NOT logic gates scattered throughout the fluorescence literature, of analytical reagents for metals for instance [31]. This is to be expected since the quenching of fluorescence is a common phenomenon, especially with the transition metal ions. [Pg.3334]

Fluorescent on-off sensors where an analyte causes a fluorescence decrease can be understood as NOT logic gates. A NOT logic gate is clearly the inverse of a YES logic gate (Fig. 1). [Pg.6]

The only ingredient in the proof of Life s universality that we have not yet discussed is memory storage. While a finite memory is fairly easy to implement with wires and logic gates - for example, glider-stream-encoded information can be made to circulate around a memory circuit contained within the computer - the construction of an arbitrarily large memory requires a bit more work,... [Pg.149]

A set G of logic gates is universal if an arbitrary ri-variable Boolean function T can be written as a composition of the logic gates in G a universal set of gates 9u- - dm is. sometimes also said to gorm a basis set for T. It is easy to show that the set consisting of the Boolean operators AND, OR and NOT, for example, is universal. ... [Pg.312]

We have thus far discussed the processing of only individual logic gates. In order to perform useful computations, however, we need to construct entire circuits. Luckily, building circuits does not involve any great jump in complexity, as we need only two additional abstract primitives to begin talking of real computation. [Pg.316]

Research on multi-qubit molecules starts with the synthesis and characterization of systems that seem to embody more than one qubit, for example, systems with weakly coupled electron spins. Indeed, many molecular structures include several weakly coupled magnetic ions [76-78]. On a smaller scale, the capability of implementing a Controlled-NOT quantum logic gate using molecular clusters... [Pg.52]

Figure 7.3 Schematic representation of the operations of some quantum logic gates acting on two qubits. In quantum computation, single qubit rotations (Figure 7.2) and CNOT (controlled-NOT) or INSWAP quantum gates are universal. Figure 7.3 Schematic representation of the operations of some quantum logic gates acting on two qubits. In quantum computation, single qubit rotations (Figure 7.2) and CNOT (controlled-NOT) or INSWAP quantum gates are universal.
Models for biochemical switches, logic gates, and information-processing devices that are also based on enzymic reactions but do not use the cyclic enzyme system were also introduced [76,115,117-122]. Examples of these models are presented in Table 1.3. It should also be mentioned that in other studies [108,112-114,116], models of chemical neurons and chemical neural networks based on nonenzymic chemical reactions were also introduced. [Pg.6]

Unlike a formal fault tree, this method is empirical and does not require logic gates to be established. All boxes are scrutinized to determine their validity. If the content of a box is refuted by hard evidence, it is crossed off with an appropriate explanation. Otherwise, the boxes are left connected to show the logical progression upward toward an incident. [Pg.55]

A very interesting extension of tlie use of PET, being explored by several schools of researchers, is in the construction of molecular scale information processors as YES, NOT, AND or XOR (exclusive-OR) and other logic gates. The use of chemical input... [Pg.209]


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