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astronomy

Masao Doi

Masao Doi is a astronomy 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 Masao Doi rather than just read about it. In short: Masao Doi (土井正男, Doi Masao) (born 29 March 1948) is a Professor Emeritus at Nagoya University and The University of Tokyo. He is a Fellow of the Toyota Physical and Chemical Research Institute.

Key takeaways

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

Reference excerpt

Masao Doi (土井正男, Doi Masao) (born 29 March 1948) is a Professor Emeritus at Nagoya University and The University of Tokyo. He is a Fellow of the Toyota Physical and Chemical Research Institute. In 1976, he introduced a second quantised formalism for studying reaction-diffusion systems. In 1978 and 1979 he wrote a series of papers with Sir Sam Edwards expanding on the concept of reptation introduced by Pierre-Gilles de Gennes in 1971. In 1996 he authored the textbook Introduction to Polymer Physics. In 2001 the American Physical Society awarded Doi the Polymer Physics Prize for "pioneering contributions to the theory of dynamics and rheology of entangled polymers and complex fluids." He was also awarded the Bingham Medal in 2001 by the Society of Rheology. In 2016, he was elected a member of the National Academy of Engineering for contributions to the rheology of polymeric liquids, especially the entanglement effect in concentrated solutions and melts.

References

Worked examples

Example 1 — a first encounter with Masao Doi

Start with the simplest possible case. Write down what Masao Doi claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Masao Doi 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 Masao Doi 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 Masao Doi

In research
Masao Doi appears in astronomy 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 Masao Doi 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
Masao Doi is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1948 births, 20th-century Japanese scientists, 21st-century Japanese scientists, so understanding it makes those chapters shorter.
In everyday life
Look for Masao Doi 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 Masao Doi in 20 minutes

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

Frequently asked questions

What is Masao Doi in simple terms?

Masao Doi (土井正男, Doi Masao) (born 29 March 1948) is a Professor Emeritus at Nagoya University and The University of Tokyo. He is a Fellow of the Toyota Physical and Chemical Research Institute.

Why does Masao Doi matter?

Because it connects several astronomy 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 Masao Doi?

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 Masao Doi.

Tags

  • 1948 births
  • 20th-century Japanese scientists
  • 21st-century Japanese scientists
  • Academic staff of Nagoya University
  • Academic staff of the University of Tokyo
  • Educator stubs
  • Living people
  • Polymer scientists and engineers
  • University of Tokyo alumni

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