engineering

John Coghlan (engineer)

John Coghlan (engineer) 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 Coghlan (engineer) rather than just read about it. In short: John Coghlan (c. 1824–1890) was an engineer born in County Kerry, Ireland. He spent thirty years in Argentina (1857–1887), during which he was in charge of several public works including Mitre Railway's extension.

Key takeaways

John Coghlan (engineer) 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 Coghlan (engineer) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of John Coghlan (engineer) from memory before moving on to harder problems.

Reference excerpt

John Coghlan (c. 1824–1890) was an engineer born in County Kerry, Ireland. He spent thirty years in Argentina (1857–1887), during which he was in charge of several public works including Mitre Railway's extension.

Career

In 1859 he proposed improvements for the Buenos Aires harbour, taking into account the streams, silting and other characteristics of the Río de la Plata. In 1869 he carried out hypsometric studies of the core of the city and its drainage capability in relation to flooding. He is also credited with building drinking water and sewage systems in the city. He was also involved in the Argentine railway system, extending the railway lines from Azul to Bahía Blanca during his term as chairman of the Gran Ferrocarril Sur Company, and from Campana to Rosario as chairman of the Ferrocarril de Buenos Aires a Campana Company. In 1871, he corresponded with Charles Darwin, and sent him specimens from Buenos Aires through a third party. He died in England in 1890. Argentine railway authorities gave his name to one of their railway stations a year after his death. What is now the barrio (neighbourhood) of Coghlan in Buenos Aires developed around the station named after him. He is related to the Argentinan genealogist and civil servant, Eduardo Aquilio Coghlan.

References

Worked examples

Example 1 — a first encounter with John Coghlan (engineer)

Start with the simplest possible case. Write down what John Coghlan (engineer) 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 Coghlan (engineer) 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 Coghlan (engineer) 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 Coghlan (engineer)

In research: John Coghlan (engineer) 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 Coghlan (engineer) 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 Coghlan (engineer) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1820s births, 1890 deaths, 19th-century Irish engineers, so understanding it makes those chapters shorter.
In everyday life: Look for John Coghlan (engineer) 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 Coghlan (engineer) in 20 minutes

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

Frequently asked questions

What is John Coghlan (engineer) in simple terms?

Why does John Coghlan (engineer) 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 Coghlan (engineer)?

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 Coghlan (engineer).