physics

Joel Lexchin

Joel Lexchin is a physics 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 Joel Lexchin rather than just read about it. In short: Joel Lexchin is a professor emeritus at the York University Faculty of Health where he taught about pharmaceutical policy, an Associate Professor in the Department of Family and Community Medicine at the University of Toronto, an emergency physician at the Toronto General Hospital and a Fellow in the Canadian Academy of Health Sciences. Lexchin is the author of over 160 peer-reviewed publications.

Key takeaways

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

Reference excerpt

Joel Lexchin is a professor emeritus at the York University Faculty of Health where he taught about pharmaceutical policy, an Associate Professor in the Department of Family and Community Medicine at the University of Toronto, an emergency physician at the Toronto General Hospital and a Fellow in the Canadian Academy of Health Sciences. Lexchin is the author of over 160 peer-reviewed publications.

Biography Lexchin received his MD from the University of Toronto in 1977. From 1992 for two years Lexchin was a member of the Ontario Drug Quality and Therapeutics Committee. He was the chair of the Drugs and Pharmacotherapy Committee of the Ontario Medical Association from 1997 for two years. In 2013, he was quoted in a learned article on Drug patents: the evergreening problem, and he wrote the article on the pharmaceutical industry for the Canadian Encyclopedia. Lexchin is frequently critical of Canada's drug regulator, the Health Products and Food Branch, as has been noticed in the learned press. In 2006, Lexchin was quoted by Manzer: "Drug approvals are not all science. There's always decisions to be made around how much risk are we willing to take in terms of drugs, and I think as the industry takes on a larger role in funding the regulatory bodies that those kinds of decisions tend to be made more in favour of the drug companies," and in 2010 was noticed in a Toronto Star article entitled "Health Canada keeps some drug studies secret".

References

Worked examples

Example 1 — a first encounter with Joel Lexchin

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

In research: Joel Lexchin appears in physics 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 Joel Lexchin 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: Joel Lexchin is common in secondary-school and first-year university syllabi. It links to neighbouring topics Canadian emergency physicians, Drug control law, Drug safety, so understanding it makes those chapters shorter.
In everyday life: Look for Joel Lexchin 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 Joel Lexchin in 20 minutes

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

Frequently asked questions

What is Joel Lexchin in simple terms?

Why does Joel Lexchin matter?

Because it connects several physics 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 Joel Lexchin?

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 Joel Lexchin.