science

Ucode system

Ucode system 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 Ucode system rather than just read about it. In short: The ucode system (written in lower case "ucode") is an identification number system that can be used to identify things in the real world uniquely. Digital information can be associated with objects and places, and the associated information can be retrieved by using ucode.

Key takeaways

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

Reference excerpt

The ucode system (written in lower case "ucode") is an identification number system that can be used to identify things in the real world uniquely. Digital information can be associated with objects and places, and the associated information can be retrieved by using ucode. Unique identification system for real world objects is considered an essential enabler for the realisation of Internet of Things and therefore ucode system is seen as a building block for Internet of Things. The ucode system uses 128 bit code for unique naming of things, so there are 340282366920938463463374607431768211455 or 3.4 x 10^38 different codes. If more codes are needed, they can be added in chunks of 128 bits. Ucode is application and technology-agnostic. Uniqueness means that each ucode is unique, there can – or at least should - not be another ucode with exactly the same number. Ucode is not tied to any specific application or business domain, neither is it committed to any specific technology for containing the ucode number, e.g. RFID, barcode or matrix code. ucode is supported by the uID center, which is a non-profit organisation based in Tokyo, Japan. The Chairman of the uID Center is Professor Ken Sakamura who is also the person behind ucode.

Structure and Resolution mechanism Ubiquitous ID system consists of five components: (1) ucode, (2) ucode tag, (3) ubiquitous communicator, (4) ucode resolution server and (5) ucode information server. The resolution process goes as follows. First, the ucode from an ucode tag using e.g. a mobile phone is read. The camera of the phone can be used to read a matrix code containing the ucode. Then, the mobile phone inquires the ucode resolution server – via internet connection - about the code. The ucode resolution server returns the source of the provided ucode information based on the ucode read. Finally, the ubiquitous communicator connects to the information provision source and acquires contents and services. The ucode server architecture is similar to the familiar Internet DNS resolution service. Like DNS, the ucode resolution mechanism consists of hierarchical levels. The ucode resolution mechanism is three tiered as follows:

uID center maintains the root server Top level domain (TLD) servers are under root Second level domain (SLD) servers are under TLD The root server is maintained by uID Center in Tokyo. TLD servers are in place in Japan, other Asian countries and in Europe (Oulu, Finland). The number of TLD and SLD servers is not limited.

ucode tags Ucode tags can take various forms. They can be

Print Tag Passive RFID Tag/Smart Card Active RF Tag (built-in battery type) Active Infrared Tag (built-in battery type) Acoustic Tag Print tags can be matrix codes, e.g. QR codes or barcodes. A special sub-section of RFID tags are NFC tags, which can contain ucode. UID Center has certified a 46 differenrf ucode tags, the first ones in 2003 were barcodes made by Sato corporation, Toppan Forms Inc. and Dai Nippon Printing Co., later on two dimensional matrix codes were introduced, followed by hologram implementation and several RFID tags, often compliant with ISO/IEC15693 standard and using frequency band 13.56 MHz.

Example The ucode solution has been used in a number of trial cases related to tourist guides, geospatial information applications, housing and real estate as well as food and drug traceability. Japanese organisation Center for Better Living is using ucode for labelling construction material and components in a unique and traceable manner. The label is a sign of approved quality and entitles the buyer into a two to ten year repair warranty, depending on the nature of the material or component.

Other identification systems EPCGlobal is an identification system aimed for supply chain information management. The EPC (Electronic Product Code) relies on RFID tags for object identification. EPCGlobal is a successor of MIT Auto ID Center which developed the technology used by EPCGlobal. [EAN] International Article Numbering system and its sister system UPC Universal Product Code are the familiar barcodes seen in all retail merchandise. ucode differs from them in identifying individual objects, not just the product type.

References

External links Official website [1] T-Engine Forum [2] EPC Global [3] Center for Better Living

Illustrations

Worked examples

Example 1 — a first encounter with Ucode system

Start with the simplest possible case. Write down what Ucode system 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 Ucode system 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 Ucode system 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 Ucode system

In research: Ucode system 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 Ucode system 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: Ucode system is common in secondary-school and first-year university syllabi. It links to neighbouring topics Digital technology, Information systems, so understanding it makes those chapters shorter.
In everyday life: Look for Ucode system 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 Ucode system in 20 minutes

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

Frequently asked questions

What is Ucode system in simple terms?

Why does Ucode system 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 Ucode system?

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 Ucode system.