science

Sezam

Sezam is a science 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 Sezam rather than just read about it. In short: Sezam was a Bulletin Board System in former Yugoslavia. Sezam BBS was founded on November 11, 1989, as one of many one phone line / night only Bulletin Board Systems in Belgrade, Yugoslavia.

Key takeaways

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

Reference excerpt

Sezam was a Bulletin Board System in former Yugoslavia. Sezam BBS was founded on November 11, 1989, as one of many one phone line / night only Bulletin Board Systems in Belgrade, Yugoslavia. Contrary to many BBS systems dedicated to file downloads, Sezam focused on conferences. The original BBS software, specially developed by Sezam's founders Zoran Životić and Dejan Ristanović, enabled users to share their comments on various topics, such as computers, education, sports, politics. Within months, Sezam had several thousand users and evolved into a subscription-based system, using 3 phone lines. During the following years it grew to 6, 8, 10 and finally 15 phone lines. Tens of thousands of users from former Yugoslavia used Sezam to communicate and exchange opinions on various subjects. During the media blockade imposed by Milosevic's regime, Sezam was one of very few free media in Serbia. In 1995 Sezam BBS evolved to SezamPro and become the influential Internet providing system in Serbia. The old BBS system, with more than million messages in the database, still exists (telnet telnet.sezampro.rs) as a monument to the stormy 1990s in Yugoslavia.

External links SezamPro Web page (in Serbian) Wired magazine article about Sezam (in English), by David S. Bennahum The early days of Sezam by one of its founders (in English)

Worked examples

Example 1 — a first encounter with Sezam

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

In research: Sezam appears in science 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 Sezam 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: Sezam is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1989 establishments in Serbia, Bulletin board systems, Internet in Serbia, so understanding it makes those chapters shorter.
In everyday life: Look for Sezam 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 Sezam in 20 minutes

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

Frequently asked questions

What is Sezam in simple terms?

Sezam was a Bulletin Board System in former Yugoslavia. Sezam BBS was founded on November 11, 1989, as one of many one phone line / night only Bulletin Board Systems in Belgrade, Yugoslavia.

Why does Sezam matter?

Because it connects several science 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 Sezam?

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 Sezam.