science

RFIQin

RFIQin 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 RFIQin rather than just read about it. In short: RFIQin, also referred to as RFIQ, is a patented automatic cooking device that consists of three different sized pans, a portable induction heater, and recipe cards, which is designed by Vita Craft Corporation, but is currently only sold in Japan through Vita Craft Japan. Electronics are embedded in the cookware, which monitor the food and send wireless signals to adjust the temperature of the induction heater accord…

Key takeaways

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

Reference excerpt

RFIQin, also referred to as RFIQ, is a patented automatic cooking device that consists of three different sized pans, a portable induction heater, and recipe cards, which is designed by Vita Craft Corporation, but is currently only sold in Japan through Vita Craft Japan. Electronics are embedded in the cookware, which monitor the food and send wireless signals to adjust the temperature of the induction heater accordingly; this prevents the loss of nutrients and saves thermal energy because the food is not overheated. Specialized recipe cards transmit a wireless signal to the RFIQin system when a recipe card is waved under the handle of the pan, initiating the cooking process. Each recipe card can include 23 distinct recipe steps. The recipe cards have cooking steps to follow that are indicated by a beeping sound from the induction heater. The system can cook almost all types of food, including cakes and fried foods. Each pan is embedded with a RFID tag in the handle of cookware, which is covered by a special pan tag that protects the RFID tag from heat and moisture. A temperature sensor connected to the RFID tag is imbedded within a tunnel in the bottom center of the pan. The RFID tag monitors the food 16 times per second and transmits a proprietary signal to the |induction heater regarding the heating characteristics of the contents as well as the temperature of the contents to adjust the heat accordingly; the special pan tag is not battery powered and does not need to be recharged. During the cooking process the food does not need to be monitored or stirred because the pans use waterless cooking methods and the induction heater uses alternating pulses to control the heat, so the liquid in the pans continually revolves in a circular motion. The RFIQin pans are built with a vapor seal that enables the pans to use techniques of pressure cooking. The portable induction heater and cookware can be used in a manual mode as a regular induction heater. Popular Science reported RFIQin will cost $600; however, in May 2006, The Sacramento Bee reported that RFIQin costs $2,100 (241,500 yen) in Japan.

See also Induction cooking Pressure cooking

References

External links Vita Craft Corporation: RFIQ U.S. patent 7,157,675, description of RFIQ (in Japanese) Vita Craft Japan: RFIQ (in Japanese) TV-Tokyo: Video of RFIQin (RealPlayer required)

Worked examples

Example 1 — a first encounter with RFIQin

Start with the simplest possible case. Write down what RFIQin 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 RFIQin 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 RFIQin 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 RFIQin

In research: RFIQin 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 RFIQin 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: RFIQin is common in secondary-school and first-year university syllabi. It links to neighbouring topics Automatic identification and data capture, Cooking appliance brands, Radio-frequency identification, so understanding it makes those chapters shorter.
In everyday life: Look for RFIQin 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 RFIQin in 20 minutes

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

Frequently asked questions

What is RFIQin in simple terms?

Why does RFIQin 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 RFIQin?

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 RFIQin.