Outlander         
         Bye! At least I got an answer to my question. — Pieter R van Wyk
Pieter R van Wyk         
         
Outlander         
         What exactly is the purpose, extent and method of the Lounge and Shoutbox? — Pieter R van Wyk
Could it help me get a decent, critical, honest review of my work? — Pieter R van Wyk
I like sushi         
         Our solar system is a finely balanced many-body problem, quite difficult to solve mathematically. A two-body problem can be solved analytically but a many-body problem can only be solved numerically. However, please consider the gravitational force exerted on system earth by the following celestial bodies and by system earth on these bodies:
F(sun) = 3.52E22 newton
F(moon) = 1.98E20 newton
F(Neptune) = 2.21E15 newton
In comparison, the worlds total population exerts a force of 4.86E12 newton on system earth.
If any of these celestial bodies would be "removed" from the solar system this fine balance would be catastrophically disrupted and the expected environmental disaster would not be a political talking point, it would be de facto. Or if our solar system evolved sans Neptune, our system earth would have evolved completely different to what it did. — Pieter R van Wyk
I like sushi         
         As for the "nice old man" ... that would depend on whom you ask: my grandchildren might agree, ↪I like sushi might not. — Pieter R van Wyk
Outlander         
         You think this is at all accurate?: — I like sushi
I like sushi         
         
Outlander         
         I suggest you learn a little about gravity first and the scales we are talking about. It would do next to nothing. — I like sushi
wonderer1         
         I do agree he is correct as to the "if one planetary body, no matter how minute or seemingly insignificant is removed, great disarray and unrest would follow" claim. — Outlander
I like sushi         
         
Outlander         
         So we better not send anything from the Earth to the Moon or to Mars and leave it there, because doing so would result in the solar system flying apart. — wonderer1
Pieter R van Wyk         
         This website has an odd reputation for people "promoting their work" (which, unlike yours, is generally not of high quality) so the site owner, and as a result his staff, tend to frown upon self-promotion in general. — Outlander
Outlander         
         I ask a simple question about a definition of a system and end up arguing about absurd nonsensical planetary questions. How odd. — Pieter R van Wyk
Pieter R van Wyk         
         
Pieter R van Wyk         
         Regardless, you are wrong. — I like sushi
I like sushi         
         
apokrisis         
         How I Understand Things. The Logic of Existence — Pieter R van Wyk
"If and when we consider things, contemplate things and try to understand things, we can consider anything. In doing this we must convert some anything into something. And there are only two ways we can do this: First we could designate some name (perceive some possible purpose) to some collection of anything and then contemplate some valid description of this specific collection. If we can agree on the unique things in this collection we have named, we could have a meaningful conversation about something. This is then the notion of a system, how we understand all physical things, even those physical things that give us a perception and an understanding of abstract things. Let us name this Systems-thinking, for future reference.
If it is not possible to name something and agree on its constituent parts - we could consider some anything in terms of something else. If we could agree on such a relationship, a meaningful conversation could also ensue. This is how we form an understanding of all conceptual things. And this we could name Relation-thinking for future reference. — Pieter R van Wyk
Stanley Salthe distinguishes compositional (or scalar) hierarchies, which are based on spatiotemporal scale, from subsumption (or specification) hierarchies, which are based on developmental history or logical relationships. The two models help to analyze complex systems from different perspectives.
Compositional (or scalar) hierarchies
This hierarchy is based on nested parts of a whole, defined by differences in magnitude, size, and rate of activity. It provides a snapshot of a system at a given moment in space and time.
Relationship: "Is-a-part-of".
Structure: Portrayed as boxes within boxes, or levels within a system. For example, a population contains organisms, which contain cells, which contain macromolecules.
Dynamic relationships: Lower-level components are constrained by the next higher level. Importantly, downward regulation is not transitive across the entire hierarchy but must be converted at each level.
Way of knowing: Understanding a system involves subdividing it into its constituent parts (a reductionist approach).
Subsumption (or specification) hierarchies
This hierarchy is based on logical or historical sequence, where earlier, more general conditions are subsumed by later, more specific ones. It describes how a system develops over time or how different fields of knowledge build upon one another.
Relationship: "Is-a-kind-of" or "develops-from".
Structure: Portrayed as nested brackets, with more specific classifications contained within more general ones. For example, the biological world is a special type of the material world, which is itself a part of the physical world: {physical world {material world {biological world}}}.
Dynamic relationships: Control or influence from a higher, more specific level (e.g., biological forms) can extend down through all lower levels (e.g., physical forces), as the higher levels impose new informational constraints on the lower ones.
Way of knowing: Understanding a system requires looking at its history or ancestral conditions.
Pieter R van Wyk         
         Pluto is no longer a 'Planet' it is a 'Dwarf Planet'. Systems can change without losing structure. — I like sushi
I like sushi         
         
Pieter R van Wyk         
         So far, this is rather rudimentary. — apokrisis
Stanley Salthe distinguishes compositional (or scalar) hierarchies, which are based on spatiotemporal scale, from subsumption (or specification) hierarchies, which are based on developmental history or logical relationships. The two models help to analyze complex systems from different perspectives.
apokrisis         
         So, according to this AI summary, a system is: two models, one a compositional hierarchy the other a subsumption hierarchy. Do you agree with my understanding? — Pieter R van Wyk
Pieter R van Wyk         
         I gave an example of a physical change that did not alter the physiccal system, in any significant way, with the removal of Neptune from the Solar System. — I like sushi
Pieter R van Wyk         
         
I like sushi         
         
Pieter R van Wyk         
         Yes, you are right (I am wrong) — Pieter R van Wyk
I am still, eagerly, awaiting your definition (or at least your understanding) of a system. — Pieter R van Wyk
apokrisis         
         But, in my humble opinion, a complementary view that renders the complexity of systems more comprehensible, is neither a definition nor a fundamental understanding. — Pieter R van Wyk
Outlander         
         It would be like asking you as an engineer to give me one fundamental definition of an engine. One that unifies all the types of engineers that there are. — apokrisis
Pieter R van Wyk         
         It would be like asking you as an engineer to give me one fundamental definition of an engine. — apokrisis
Your whole schtick about “give me a fundamental definition” is crackpot talk. — apokrisis
Systems science is a large and varied field of study. — apokrisis
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