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astronomy

John David Crawford

John David Crawford 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 John David Crawford rather than just read about it. In short: John David Crawford (1954–1998) was an American physicist and professor at the University of Pittsburgh. He obtained his undergraduate degree with honors from Princeton University in 1977 and his Ph.D. from the University of California, Berkeley in 1983.

Key takeaways

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

Reference excerpt

John David Crawford (1954–1998) was an American physicist and professor at the University of Pittsburgh. He obtained his undergraduate degree with honors from Princeton University in 1977 and his Ph.D. from the University of California, Berkeley in 1983. An internationally recognized researcher in theoretical physics, he specialized in plasma physics and nonlinear dynamics. His broad physical insight and deep knowledge of mathematics enabled him to make profound contributions to dynamical systems. He published more than 80 research papers and wrote a landmark review on bifurcation theory. Additionally, he was also a codirector of the "Research Experiences for Undergraduates" program, which exposed undergraduates to scientific study, in 1997. Apart from his research, he was a passionate mountain climber. He died on August 23, 1998, at the Montefiore Hospital in Pittsburgh of Burkitt's lymphoma, a form of lymph cancer. In 2001, SIAM's Activity Group in Dynamical Systems established the J.D. Crawford Prize, which is now the world's top award in dynamical systems.

References

Worked examples

Example 1 — a first encounter with John David Crawford

Start with the simplest possible case. Write down what John David Crawford 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 John David Crawford 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 John David Crawford 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 John David Crawford

In research
John David Crawford 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 John David Crawford 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
John David Crawford is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1954 births, 1998 deaths, 20th-century American mathematicians, so understanding it makes those chapters shorter.
In everyday life
Look for John David Crawford 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 John David Crawford in 20 minutes

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

Frequently asked questions

What is John David Crawford in simple terms?

John David Crawford (1954–1998) was an American physicist and professor at the University of Pittsburgh. He obtained his undergraduate degree with honors from Princeton University in 1977 and his Ph.D. from the University of California, Berkeley in 1983.

Why does John David Crawford 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 John David Crawford?

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 John David Crawford.

Tags

  • 1954 births
  • 1998 deaths
  • 20th-century American mathematicians
  • 20th-century American physicists
  • American mathematician stubs
  • American mountain climbers
  • Deaths from lymphoma in the United States
  • Princeton University alumni
  • University of California, Berkeley alumni
  • University of Pittsburgh faculty

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