Boolean logic operations

Table 11.1 Truth table and symbols for some common Boolean logic operations based on two inputs Pand Q.

FTA is a top-down or deductive technique. It employs a graphical method to articulate the causes of a top event which, in turn, is directly related to a hazard. Each cause of the top event is analysed further to examine its causes and so on. The resulting structure is represented as a tree, each event being linked by boolean logic operators (and, or, not, etc.). In some cases the top event can be replaced by a lower level event which effectively allows trees to be connected or embedded to model... 

Fig. 1 Boolean logic operations of 1 -input logic gates. Input and output levels are represented in binary digit 0 for low and 1 for high...

Microelectrode suuctures have been created that mimic aspects of brain function. Amatore and coworkers have described assemblies of paired microband electrodes that behave like a neuronal synapse (26). The generator electrode in these devices mimics a synaptic terminal, and the collector electrode functions as a postsynaptic membrane. These artificial synapses can be designed in several configurations to perform Boolean logical operations, such as AND or OR operations. 

Logical Operations. Encoding boolean logical operations can be emulated... 

Boolean Logical Operators and Other Proximity Operators... 

A novel approach to the nonlinear modeling of neural systems with point-process (spike) inputs and outputs has been recently proposed, whereby Boolean logical operators (OR, AND, NAND) are used in the context of a Volterra-like hierarchy of input lag combinations to express the binary output of the system/model (Marmarelis et al. 2009). This approach holds considerable promise in simplifying the input-output representation of neural models and facilitating the actual implementation of multichannel neural prostheses in the form of application-specific integrated circuits. 

---