astronomy

Hassan Aref

Hassan Aref 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 Hassan Aref rather than just read about it. In short: Hassan Aref (Arabic: حسن عارف), (28 September 1950 – 9 September 2011) was the Reynolds Metals Professor in the Department of Engineering Science and Mechanics at Virginia Tech, and the Niels Bohr Visiting Professor at the Technical University of Denmark. Education He was educated at the University of Copenhagen Niels Bohr Institute, graduating in 1975 with a cand. scient degree in Physics and Mathematics.

Key takeaways

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

Reference excerpt

Hassan Aref (Arabic: حسن عارف), (28 September 1950 – 9 September 2011) was the Reynolds Metals Professor in the Department of Engineering Science and Mechanics at Virginia Tech, and the Niels Bohr Visiting Professor at the Technical University of Denmark.

Education He was educated at the University of Copenhagen Niels Bohr Institute, graduating in 1975 with a cand. scient degree in Physics and Mathematics. Subsequently he received a PhD degree in Physics from Cornell University in 1980.

Career

Academia and research Prior to joining Virginia Tech as Dean of Engineering in 2003-2005 Aref was Head of the Department of Theoretical and Applied Mechanics at University of Illinois at Urbana-Champaign for a decade from 1992-2003. Before that he was on the faculty of University of California, San Diego, split between the Department of Applied Mechanics and Engineering Science and the Institute of Geophysics and Planetary Physics 1985-1992. Simultaneously, he was Chief Scientist at the San Diego Supercomputer Center for three years 1989-1992. Aref started his faculty career in the Division of Engineering at Brown University 1980-85.

Editorial work Throughout his career Aref was involved in editorial work. He was Associate Editor of Journal of Fluid Mechanics 1984-94, founding editor with David Crighton of Cambridge Texts in Applied Mathematics, and served on the editorial board of Theoretical and Computational Fluid Dynamics and as co-editor of Advances in Applied Mechanics. He served on the editorial boards of Physics of Fluids, Physical Review E, and Regular and Chaotic Dynamics.

Notable research

Fluid mechanics Aref was the author of some 80 articles in leading journals in the field of fluid mechanics. He has also authored chapters in several books, edited two collections of papers, and given presentations at conferences and universities around the world. Aref received the 2000 Otto Laporte Award from the American Physical Society for this work and for his work on vortex dynamics for which he is also well known.

Positions on scientific committees Aref served as chair of the Division of Fluid Dynamics of the American Physical Society. He chaired the US National Committee on Theoretical and Applied Mechanics and has served on advisory boards for several professional societies. He was a member of the Executive Committee of the Congress Committee of the International Union of Theoretical and Applied Mechanics (IUTAM), a member of the National Academies Board on International Scientific Organizations, and a member of the Board of the Society of Engineering Science. He served as Secretary for the Midwest Mechanics Seminar, 1994-2003. Aref was president of the 20th International Congress of Theoretical and Applied Mechanics held in Chicago in 2000. In the 70+ years of these significant congresses they have been held three times in USA: In 1938 in Boston, MA, with MIT and Harvard University as the host institutions, in 1968 with Stanford University as the host, and in 2000 with a consortium led by University of Illinois, Urbana-Champaign as the hosts.

Personal life and death Hassan Aref was born in Alexandria, Egypt. Previously a citizen of Canada, he acquired U.S. citizenship in 1998. He died from an aortic dissection.

Honors and awards 2011 Geoffrey Ingram Taylor Medal 2011 Honorary Doctorate, Technical University of Denmark 2006 Niels Bohr Visiting Professor, Technical University of Denmark 2003 Reynolds Metals Professor, Virginia Tech 2001 Fellow, World Innovation Foundation 2000 Otto Laporte Award, American Physical Society "For his pioneering contributions to the study of chaotic motion in fluids, scientific computation, and vortex dynamics, and most notably for the development of the concept of chaotic advection." 2000 Fellow, American Academy of Mechanics 1994 Toshiba Keio Lecture, Keio University, Japan 1991 Westinghouse Distinguished Lectureship, University of Michigan 1991 Lecturer, Midwest Mechanics Seminar 1988 Fellow, American Physical Society "For the elucidation of chaotic motion in few-vortex problems and particle advection, and for the development of numerical methods based on many-vortex interactions." 1988 Stanley Corrsin Lectureship, The Johns Hopkins University 1986 Foreign Member, Danish Centre for Applied Mathematics and Mechanics 1985 Presidential Young Investigator Award, National Science Foundation 1975 NATO Fellowship; Cornell University Graduate Fellowship, 1975–1980

References

External links Personal web page at Virginia Tech: "Hassan Aref". Archived from the original on 20 July 2011. Personal web page at the University of Illinois at Urbana–Champaign: "Hassan Aref". Archived from the original on 18 February 2003. Vortex Dynamics Blog by Hassan Aref Hassan Aref's blog Blog by Hassan Aref Author profile in the database zbMATH

Worked examples

Example 1 — a first encounter with Hassan Aref

Start with the simplest possible case. Write down what Hassan Aref 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 Hassan Aref 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 Hassan Aref 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 Hassan Aref

In research: Hassan Aref 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 Hassan Aref 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: Hassan Aref is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1950 births, 2011 deaths, American physicists, so understanding it makes those chapters shorter.
In everyday life: Look for Hassan Aref 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 Hassan Aref in 20 minutes

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

Frequently asked questions

What is Hassan Aref in simple terms?

Why does Hassan Aref 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 Hassan Aref?

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 Hassan Aref.