engineering

John J. Leonard

John J. Leonard is a engineering 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 J. Leonard rather than just read about it. In short: John J. Leonard is an American roboticist and Professor of Mechanical and Ocean Engineering at the Massachusetts Institute of Technology.

Key takeaways

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

Reference excerpt

John J. Leonard is an American roboticist and Professor of Mechanical and Ocean Engineering at the Massachusetts Institute of Technology. A member of the MIT Computer Science and Artificial Intelligence Laboratory (CSAIL), Leonard is a researcher in simultaneous localization and mapping, and was the team lead for MIT's team at the 2007 DARPA Urban Challenge, one of the six teams to cross the finish line in the final event, placing fourth overall.

Life and career Leonard received his B.S. in Electrical Engineering from the University of Pennsylvania in 1987 and his D.Phil. in Engineering Science from the University of Oxford in 1994, under the Thouron Award. He spent five years as a postdoctoral fellow and Research Scientist in the MIT Sea Grant Autonomous Underwater Vehicle (AUV) Laboratory, and joined the MIT faculty in 1996. Leonard is one of the early pioneers of SLAM with Hugh F. Durrant-Whyte. Leonard has served as an associate editor of the IEEE Journal of Oceanic Engineering and of the IEEE Transactions on Robotics and Automation. He received the National Science Foundation Career Award in 1998, an E.T.S. Walton Visitor Award from Science Foundation Ireland in 2004, and the King-Sun Fu Memorial Best IEEE Transactions on Robotics Paper Award in 2006. Leonard describes his primary research goal as persistent autonomy, i.e., the "capability for one or more robots to operate robustly for days, weeks and months at a time with minimal human supervision, in complex, dynamic environments". Leonard focuses on the problem of simultaneous localization and mapping (SLAM), particularly for autonomous underwater vehicles.

References

External links Home page MIT DGC home

Worked examples

Example 1 — a first encounter with John J. Leonard

Start with the simplest possible case. Write down what John J. Leonard claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 J. Leonard 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 J. Leonard 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 J. Leonard

In research: John J. Leonard appears in engineering 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 J. Leonard 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 J. Leonard is common in secondary-school and first-year university syllabi. It links to neighbouring topics Alumni of the University of Oxford, American control theorists, American roboticists, so understanding it makes those chapters shorter.
In everyday life: Look for John J. Leonard 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 J. Leonard in 20 minutes

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

Frequently asked questions

What is John J. Leonard in simple terms?

John J. Leonard is an American roboticist and Professor of Mechanical and Ocean Engineering at the Massachusetts Institute of Technology.

Why does John J. Leonard matter?

Because it connects several engineering 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 J. Leonard?

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 J. Leonard.