Elevators
Everyone has shared the frustration of waiting for an elevator that never seems to arrive. "I pressed the button, why isn't it coming?" you ask. For something as commonplace as elevators, they are far more complex than meets the eye.Over the course of this article, we'll unravel the mysteries of elevators.
- ▪Everyone has shared the frustration of waiting for an elevator that never seems to arrive.
- ▪"I pressed the button, why isn't it coming?" you ask.
- ▪For something as commonplace as elevators, they are far more complex than meets the eye.Over the course of this article, we'll unravel the mysteries of elevators.
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Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | John.fun |
| Canonical URL | https://john.fun/elevators |
| Publication time | Fri, 31 Jul 2026 15:17:28 +0000 |
| Retrieval time | 2026-07-31T15:53:07.010Z |
| Last seen | 2026-07-31T15:53:07.010Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | None |
| Cluster logic | Not yet clustered, or no peer story found in the clustering window. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Everyone has shared the frustration of waiting for an elevator that never seems to arrive. "I pressed the button, why isn't it coming?" you ask. For something as commonplace as elevators, they are far more complex than meets the eye.Over the course of this article, we'll unravel the mysteries of elevators. The way you push their buttons, and how they push yours.43211x5x25xOne CarThe simplest elevator algorithm is called SCAN and was patented in 1961. The elevator starts at the lobby and goes all the way to the top floor before reversing and coming back down. It picks up and drops off anybody on the way.Most of the time you don't actually need to go to the TOP floor. If the elevator goes only as high as requested before reversing, the algorithm is called the LOOK algorithm.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at John.fun.
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