Abstract: A system includes a processor and memory comprising executable instructions that cause the processor to effectuate operations. The operations include determining that a network resource has been implemented using a network element indicated by a data structure of a graph database comprising a network inventory. The operations also include establishing a first level model based on at least the data structure and a second level model indicative of the network resource. The operations include defining a topology of the second level model, wherein the topology comprises the first level model. The operations also include defining a persona associated with the first level model, the persona linking the first level model to the second level model.

Abstract: A finite impulse response (FIR) extractor includes at least one controller. The controller injects specified FIR tap values into a first captured waveform that results from transmitting a raw waveform through a transmitter circuit including a FIR filter having pre and post cursor tap values set to zero to create an expected waveform, and injects the specified FIR tap values into the raw waveform to create an ideal waveform. The controller further projects the expected and ideal waveforms onto a second captured waveform that results from transmitting the ideal waveform through the transmitter circuit with the pre and post cursor tap values set to the specified FIR tap values to create a compensated waveform, and extracts FIR tap values from the compensated waveform.

Abstract: A finite impulse response (FIR) extractor includes at least one controller. The controller injects specified FIR tap values into a first captured waveform that results from transmitting a raw waveform through a transmitter circuit including a FIR filter having pre and post cursor tap values set to zero to create an expected waveform, and injects the specified FIR tap values into the raw waveform to create an ideal waveform. The controller further projects the expected and ideal waveforms onto a second captured waveform that results from transmitting the ideal waveform through the transmitter circuit with the pre and post cursor tap values set to the specified FIR tap values to create a compensated waveform, and extracts FIR tap values from the compensated waveform.

Abstract: The invention relates to a ball-point writing instrument capable of writing with an intense colored or black line which is easily visible and readable and as permanent and eventually non-erasable as the best customary ball-pen ink traces, but which, in addition, is easily erasable by mechanical means for an initial period of about two to four hours as a normal graphite pencil trace, without the use of bleaches or chemicals. These properties are attained by the provision of a novel ink composition containing stated rubbers and volatile solvents which control erasability.