astronomy

Xie Jialin

Xie Jialin 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 Xie Jialin rather than just read about it. In short: Xie Jialin (Chinese: 谢家麟; 8 August 1920 – 20 February 2016) was a Chinese physicist. Born in Harbin, he studied physics at Yenching University.

Key takeaways

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

Reference excerpt

Xie Jialin (Chinese: 谢家麟; 8 August 1920 – 20 February 2016) was a Chinese physicist. Born in Harbin, he studied physics at Yenching University. Upon graduation in 1943, Xie enrolled at Stanford University, where he earned a Ph.D. in 1951. While working for the University of Chicago Medical Center in 1955, he developed a particle accelerator used to treat cancerous tumors. Later that year, Xie returned to China and helped build the country's first particle accelerator. For his contribution to the development of the 30MeV electron Linear particle accelerator, Xie was awarded the Scientific and Technological Achievement Prize at the 1978 National Science and Technology Conference. Xie went on to become the project director during design, development and construction of the Beijing Electron Positron Collider (BEPC), which was most notably used in precision measurement of the τ lepton. He received the State Preeminent Science and Technology Award for his work in 2011. Xie died on 20 February 2016 at the age of 95 in Beijing. The inner main-belt asteroid 32928 Xiejialin, discovered by SCAP at the Xinglong Station in 1995, is named in his honor. Naming citation was published on 5 January 2015 (M.P.C. 91791).

References

External links 32928号小行星命名为“谢家麟星 Archived 2016-03-08 at the Wayback Machine, Institute of High Energy Physics, Chinese Academy of Sciences (in Chinese)

Worked examples

Example 1 — a first encounter with Xie Jialin

Start with the simplest possible case. Write down what Xie Jialin 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 Xie Jialin 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 Xie Jialin 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 Xie Jialin

In research: Xie Jialin 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 Xie Jialin 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: Xie Jialin is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1920 births, 2016 deaths, Chinese expatriates in the United States, so understanding it makes those chapters shorter.
In everyday life: Look for Xie Jialin 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 Xie Jialin in 20 minutes

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

Frequently asked questions

What is Xie Jialin in simple terms?

Xie Jialin (Chinese: 谢家麟; 8 August 1920 – 20 February 2016) was a Chinese physicist. Born in Harbin, he studied physics at Yenching University.

Why does Xie Jialin 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 Xie Jialin?

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 Xie Jialin.