Event-Based Approach

Event-Based Approach

Executive Summary

  • Event-based systems react to events, not timers or sequential code execution, thus saving energy, time, and memory.
  • But time is also defined by events—without events, time itself has no meaning.
  • Optimal systems integrate event-based and time-based approaches—balancing efficiency with long-term resiliency to errors and inherent uncertainty.
  • Saturation mechanisms prevent failure by enforcing periodic system changes, even when event-based triggers fail.

Event-Based Approach: Core Principles

  • Event-based logic is not just a technical choice—it is a foundational ideology that shapes both hardware and software architecture.
  • In intelligent systems, event-driven decision-making applies to both physical actions (in-body) and cognitive processes (in-mind).

Time as an Event-Driven Concept

  • Time is not an absolute entity but a sequence of events.

    • If nothing happens, the system should only store the start and end timestamps of the inactivity.
    • This aligns with natural perception—we measure time between events, not in continuous increments.
  • Events define time itself:

    • A second is an arbitrarily defined unit—9,192,631,770 oscillations of a cesium atom.
    • We assume these oscillations are stable, but we have no deeper reference to verify time’s absolute nature.
    • Intelligence extrapolates time from event patterns, not from an independent inner mind “clock.”
  • Time perception is event-driven:

    • A cat learns that its owner arriving home signals mealtime, using it as a time reference.
    • If the owner returns earlier, the cat misinterprets the event as the end of a full day, relying on past patterns rather than absolute time.
    • Humans make similar cognitive errors when assuming standardized time measurement is inherently correct without deeper verification.

Memory and Event-Based Data Processing

  • Redundant static data should not be stored or processed.

    • If a robot stares at a white wall, storing 100 frames per second is meaningless.
    • Memory should act like keyframe-based video compression, recording only meaningful changes.
  • Repeated experiences should condense into high-level knowledge.

    • If a robot navigates the same warehouse path 100 times with no new obstacles,
      • The full event history is unnecessary.
      • Only new deviations matter—otherwise, the system simply increments a success counter.
  • Event-driven memory is hierarchical:

    • On a small scale, minor variations exist.
    • On a larger scale, events smooth out into patterns—when nothing significant happens, the derivative of change is zero.
    • This ties into layered system design, where information is processed at different abstraction levels.

Event-Based vs. Time-Based Processing

Event-BasedTime-Based
Triggered by system changes – mostly, on external inputsRuns at fixed time intervals
More efficient, reacts only when necessaryEnsures periodic updates even without new events
Adapts dynamicallyPrevents failure in case of missing events
  • All systems in our Universe are fundamentally event-based.

    • Even time itself – seconds in SI – is an arbitrarily defined sequence of events.
    • However, purely event-driven systems can fail when sensors miss events or fail to trigger.
  • Optimal systems balance event-driven logic with periodic saturation resets.

    • Event-based processing ensures efficiency—acting only when necessary.
    • Time-based fallbacks prevent event-detection failures from leading to catastrophic errors.

Example: The Pipe Clogging Sensor

  • A clog detector reports that the pipeline is clear.

    • If it fails silently, an event-based system may never detect the clog.
    • A pure event-driven system is vulnerable to such sensor failures.
  • A hybrid approach prevents this issue:

    • The event-based system waits for a clog-detection event.
    • A time-based backup rule enforces scheduled maintenance every 50 years.
    • This prevents catastrophic failure, even if no event occurs.
  • The principle of saturation applies here:

    • Over time, the probability of pipeline failure increases.
    • The expected damage from failure eventually outweighs the benefits of delaying maintenance.
    • Even if the system “could” wait longer, the cost of waiting rises, making replacement the rational choice.

Conclusion

  • Event-based processing is fundamental to intelligent system design.
  • Time is a byproduct of events—intelligence perceives time only through changes.
  • Memory should store only meaningful changes, not redundant data.
  • Layered system design allows hierarchical event abstraction, optimizing decision-making.
  • Event-based and time-based approaches should be integrated to balance efficiency with long-term system stability and resilience to errors and enthropy in general.
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