science

Shigeru Shirai

Shigeru Shirai 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 Shigeru Shirai rather than just read about it. In short: Shigeru Shirai (白井滋, Shirai Shigeru) is a Japanese ichthyologist specializing in elasmobranchs, especially sharks. He graduated from Hokkaido University's Laboratory of Marine Zoology with a PhD in Fisheries Science.

Key takeaways

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

Reference excerpt

Shigeru Shirai (白井滋, Shirai Shigeru) is a Japanese ichthyologist specializing in elasmobranchs, especially sharks. He graduated from Hokkaido University's Laboratory of Marine Zoology with a PhD in Fisheries Science. He is an editor of Japan's Ichthyological Research journal and author of the book, Squalean Phylogeny. He died at the age of 63 on September 9, 2020.

Taxon described by him See Category:Taxa named by Shigeru Shirai

References 4. 白井　滋さんを偲んで. Japanese Society for Elasmobranch Studies. Vol.53. March 2021.

Worked examples

Example 1 — a first encounter with Shigeru Shirai

Start with the simplest possible case. Write down what Shigeru Shirai 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 Shigeru Shirai 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 Shigeru Shirai 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 Shigeru Shirai

In research: Shigeru Shirai 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 Shigeru Shirai 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: Shigeru Shirai is common in secondary-school and first-year university syllabi. It links to neighbouring topics Japanese ichthyologists, Japanese scientist stubs, Japanese scientists, so understanding it makes those chapters shorter.
In everyday life: Look for Shigeru Shirai 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 Shigeru Shirai in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Shigeru Shirai 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 Shigeru Shirai out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Shigeru Shirai in simple terms?

Why does Shigeru Shirai 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 Shigeru Shirai?

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 Shigeru Shirai.