computer science

Homeland Security Information Network

Homeland Security Information Network is a computer 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 Homeland Security Information Network rather than just read about it. In short: The Homeland Security Information Network (HSIN) is a web-based platform, run by the Department of Homeland Security, which is designed to allow local, state, tribal, and federal government agencies to share "Sensitive But Unclassified (SBU)" information with each other over a secure channel. The HSIN provides three main functional categories.

Key takeaways

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

Reference excerpt

The Homeland Security Information Network (HSIN) is a web-based platform, run by the Department of Homeland Security, which is designed to allow local, state, tribal, and federal government agencies to share "Sensitive But Unclassified (SBU)" information with each other over a secure channel. The HSIN provides three main functional categories. First, it provides a SharePoint web portal system which allows agencies and events to have a basic workspace for collaboration. Second, it provides a Jabber chat system, with user managed rooms. Third, it provides the Common Operational Picture, a custom executive situational awareness web application based on Oracle HTML DB. The Department of Homeland Security has publicly announced that the network has so far been hacked at least twice in 2009—once in March and once in April.

See also Automated Trusted Information Exchange Joint Regional Information Exchange System Multistate Anti-Terrorism Information Exchange National Criminal Intelligence Sharing Plan Regional Information Sharing Systems Surveillance

References

Worked examples

Example 1 — a first encounter with Homeland Security Information Network

Start with the simplest possible case. Write down what Homeland Security Information Network claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer 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 Homeland Security Information Network 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 Homeland Security Information Network 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 Homeland Security Information Network

In research: Homeland Security Information Network appears in computer 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 Homeland Security Information Network 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: Homeland Security Information Network is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computing stubs, Surveillance, United States Department of Homeland Security, so understanding it makes those chapters shorter.
In everyday life: Look for Homeland Security Information Network 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 Homeland Security Information Network in 20 minutes

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

Frequently asked questions

What is Homeland Security Information Network in simple terms?

Why does Homeland Security Information Network matter?

Because it connects several computer 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 Homeland Security Information Network?

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 Homeland Security Information Network.