astronomy

Karl von Keissler

Karl von Keissler 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 Karl von Keissler rather than just read about it. In short: Karl von Keissler (13 March 1872, in Vienna – 9 January 1965) was an Austrian lichenologist and mycologist. In 1895 he obtained his doctorate from the University of Vienna, afterwards spending several years as an assistant in the botanical garden at Vienna.

Key takeaways

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

Reference excerpt

Karl von Keissler (13 March 1872, in Vienna – 9 January 1965) was an Austrian lichenologist and mycologist. In 1895 he obtained his doctorate from the University of Vienna, afterwards spending several years as an assistant in the botanical garden at Vienna. From 1899 to 1938, he performed various functions in the botanical department at the Naturhistorisches Museum. In 1922 (or 1923) he was appointed director of the museum's botanical department. Starting from 1923 until 1933 he published the exsiccata Kryptogamae exsiccatae editae a Museo Palatino Vindobonensi. The lichenicolous fungi genus Keissleriomyces (D.Hawksw. 1981) bears his name, as do the mycological genera Keissleria (a synonym of Broomella Sacc.) and Keissleriella (both were named by Franz Xaver Rudolf von Höhnel). Similarly, Keisslerellum was published by Werner in 1944 before becoming a synonym for Mycoporellum (Müll.Arg.) Also Keisslerina (a synonym of Dothiora Fr.) and Neokeissleria (a synonym of Ceriospora Henn. & Plöttn.) both were named by Franz Petrak.

Selected works Systematische Untersuchungen über Flechtenparasiten und lichenoide Pilze, 1920 - Systematic investigations of lichen parasites and lichenoid fungi. Die Flechtenparasiten, 1928 - Lichen parasites. Zusammenstellung einiger interessanter flechtenparasiten, 1933 - Compilation of some interesting lichen parasites. Moriolaceae, 1934 - The fungi family Moriolaceae. Pyrenulaceae bis Mycoporaceae, Coniocarpineae, 1938 - Pyrenulaceae to Mycoporaceae, Coniocarpineae. Usneaceae, 1960 - The lichen family Usneaceae.

See also Category:Taxa named by Karl von Keissler

References

Worked examples

Example 1 — a first encounter with Karl von Keissler

Start with the simplest possible case. Write down what Karl von Keissler 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 Karl von Keissler 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 Karl von Keissler 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 Karl von Keissler

In research: Karl von Keissler 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 Karl von Keissler 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: Karl von Keissler is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1872 births, 1965 deaths, Austrian lichenologists, so understanding it makes those chapters shorter.
In everyday life: Look for Karl von Keissler 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 Karl von Keissler in 20 minutes

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

Frequently asked questions

What is Karl von Keissler in simple terms?

Why does Karl von Keissler 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 Karl von Keissler?

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 Karl von Keissler.