New PDF release: A homemade honey extractor

By Larry McWilliams

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Extra info for A homemade honey extractor

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Artificial systems 1 An enterprise, organization, or individual having an interest or a stake in the outcome of the engineering of a system. Examples of stakeholders are acquirer, user, customer, manufacturer, installer, tester, maintainer, executive manager, project manager, and all other personnel having a stake in the development or outcome of the engineering of a system. The enterprise as a corporation or agency and the general public are also stakeholders. 1. Artificial autotelic and heterotelic systems Among the artificial systems that humans can create, we can see that the systems of interest, mentioned in ISO15288, have a purpose, just like any artificial system; but in this case, this purpose is external to the system itself.

When its endo-structure Sint is empty, the object Σ is not a system; this is the case for fictitious stellar objects such as constellations. Ursa Major, unlike the galaxy M31 or the galaxy of Andromeda, is not a stellar system, whereas the stars that form it are themselves systems. The definition of a system that we state deviates from the one proposed by von Bertalanffy and by many authors later on, beginning with the definition given in [SEB 13], namely “a system is a set of elements in interaction”.

2 is presented in three columns. The first column denotes facts (things in a given state, event and process) in the reality, whereas the other two columns are in the abstraction domain (in other words, in the head of different stakeholders). In reality, a current state objectively exists: for example, the presence of an obstacle (for an aircraft) that crosses the trajectory of another aircraft in evolution. This current state will evolve into a future state due to the laws of flight. In this example, the future state corresponds to a collision between these two aircraft.

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A homemade honey extractor by Larry McWilliams

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