science

Phlog

Phlog is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Phlog rather than just read about it. In short: A phlog, also called an rlog, is a type of daybook, similar to a blog, that runs off a Gopher protocol server. These phlogs are typically hosted from home servers running some sort of UNIX operating system, because a user account on the server is usually required to update the content.

Key takeaways

Phlog belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Phlog to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Phlog from memory before moving on to harder problems.

Reference excerpt

A phlog, also called an rlog, is a type of daybook, similar to a blog, that runs off a Gopher protocol server. These phlogs are typically hosted from home servers running some sort of UNIX operating system, because a user account on the server is usually required to update the content. There are quite a few phlogs floating around gopherspace but the vast majority are not updated regularly. Phlogs usually arranged as a directory structure with the title or date of each entry, has a separate folder for archives. It is possible to have a few sentences under each link to a blog entry as a summary, or to host the phlog as one single text or HTML file; however, HTML files cannot be read by some pure gopher clients. Most phlogs are maintained by hand as a series of text files. Open source software exists to convert posts from a WordPress blog into plain text files that can be accessed using the gopher protocol. The word "phlog" is derived from "blog" but with the "ph" from "gopher" instead of the "b" from "web" and appears to have been coined by Jeff Woodall on April 22, 2003.

Gopherlog A phlog can also be known as a gopherlog. The first known usage of the term "gopherlog" was by George Hotelling as an April Fool's Day joke on April 1, 2005.

References

External links Down the gopher hole Floodgap Gopher-HTTP gateway SDF Gopher (gopher link), web proxy link Port70 Phlog (used to be Hactar.net) (gopher link) SDF gopher club Phlogs on the SDF Public Access UNIX System

Worked examples

Example 1 — a first encounter with Phlog

Start with the simplest possible case. Write down what Phlog claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Phlog before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Phlog ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Phlog

In research: Phlog appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Phlog in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Phlog is common in secondary-school and first-year university syllabi. It links to neighbouring topics Blogs, Gopher (protocol), Home servers, so understanding it makes those chapters shorter.
In everyday life: Look for Phlog outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Phlog in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Phlog means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Phlog out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Phlog in simple terms?

Why does Phlog matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Phlog?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Phlog.