astronomy

René Janssen

René Janssen 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 René Janssen rather than just read about it. In short: René A.J. Janssen (born 1959 in Roermond, Netherlands) is a Dutch chemist who is Professor of the Moleculair Materials and Nanosystems group (M2N group) within the department of Chemical engineering and Chemistry at Eindhoven University of Technology.

Key takeaways

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

Reference excerpt

René A.J. Janssen (born 1959 in Roermond, Netherlands) is a Dutch chemist who is Professor of the Moleculair Materials and Nanosystems group (M2N group) within the department of Chemical engineering and Chemistry at Eindhoven University of Technology. In 2013 Janssen won a 2.5 million euro grant by the European Research Council to develop methods to produce solar energy systems at a lower cost. In 2015 he was one of four winners of the Dutch Spinoza Prize. Part of Janssen's research focuses on plastic solar cells and the storage of solar energy in solar cells. Since 2011 Janssen is member of the Royal Netherlands Academy of Arts and Sciences.

References

External links Profile at Eindhoven University of Technology

Illustrations

Worked examples

Example 1 — a first encounter with René Janssen

Start with the simplest possible case. Write down what René Janssen 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 René Janssen 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 René Janssen 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 René Janssen

In research: René Janssen 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 René Janssen 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: René Janssen is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1959 births, Academic staff of the Eindhoven University of Technology, Dutch nanotechnologists, so understanding it makes those chapters shorter.
In everyday life: Look for René Janssen 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 René Janssen in 20 minutes

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

Frequently asked questions

What is René Janssen in simple terms?

Why does René Janssen 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 René Janssen?

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 René Janssen.