science

Human Research Facility Holter Monitor

Human Research Facility Holter Monitor 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 Human Research Facility Holter Monitor rather than just read about it. In short: The Human Research Facility Holter Monitor (Holter) is a battery-powered, noninvasive electrocardiogram (ECG) device that accurately measures the heart rate of crew members over an extended period of time (up to 24 or 48 hours). ECG information is stored on a Portable Computer Memory Card International Adapter (PCMCIA) card and downlinked to Earth for analysis after monitoring is complete.

Key takeaways

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

Reference excerpt

The Human Research Facility Holter Monitor (Holter) is a battery-powered, noninvasive electrocardiogram (ECG) device that accurately measures the heart rate of crew members over an extended period of time (up to 24 or 48 hours). ECG information is stored on a Portable Computer Memory Card International Adapter (PCMCIA) card and downlinked to Earth for analysis after monitoring is complete.

Description Facility Summary :

The Human Research Facility Holter Monitor (Holter) is a modified commercial off-the-shelf (COTS) device that accurately records the electrical activity of a crew-member's heart over an extended period of time (up to 24 or 48 hours). This noninvasive electrocardiogram (ECG) device is available to support future experiments. The Holter is a three-channel, seven-lead ECG that can be placed in a variety of configurations, powered by one, two, or three 9V alkaline batteries, depending on the length of recording and desired sampling rate. The Holter contains a removable Portable Computer Memory Card International Adapter (PCMCIA) card that allows the data to be stored, downloaded to a personal computer, and downlinked. The Human Research Facility Holter Monitor (Holter) measures and records the electrical activity of a crew member's heart. The Holter is a battery-powered digital recorder that is capable of recording the electrocardiogram (ECG) data continuously for up to 24 or 48 hours. The Holter currently in use on the International Space Station is manufactured by Spacelabs Healthcare, Incorporated, of Issaquah, Washington. The Holter measures heart rates ranging from 0 to 240 beats per minute (bpm) at a sampling rate of 128 or 256 Hz. It measures ECG signals ranging from -2.5 to +2.5 mV (normal mode) and -5 to +5 mV (half-gain mode) at a sampling rate of 128 Hz or 256 Hz with an accuracy of +/- 2 percent of full range.

Operations The Human Research Facility (HRF) Holter accessories kit is stowed during launch and landing. Prior to using the Holter, the crew-member takes the HRF Holter accessories kit from stowage, uses the razor to shave the electrode sites, wipes the area clean with biocide wipes, and applies the electrode pads to the chest in the configuration depicted on the placard. The crew-member then dons the hardware, attaches the Holter harness to the main unit, and activates the hardware. At the end of the recording period, the crew-member deactivates, doffs, and stows the hardware. For data download, the crew-member removes the hard disk card assembly from the main unit, plugs the card into the HRF personal computer (PC), and downloads the data to the HRF PC. Downlink of the Holter data is accomplished as part of HRF rack activities.

Illustrations

Worked examples

Example 1 — a first encounter with Human Research Facility Holter Monitor

Start with the simplest possible case. Write down what Human Research Facility Holter Monitor 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 Human Research Facility Holter Monitor 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 Human Research Facility Holter Monitor 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 Human Research Facility Holter Monitor

In research: Human Research Facility Holter Monitor 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 Human Research Facility Holter Monitor 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: Human Research Facility Holter Monitor is common in secondary-school and first-year university syllabi. It links to neighbouring topics International Space Station experiments, Kibo (ISS module), Science facilities on the International Space Station, so understanding it makes those chapters shorter.
In everyday life: Look for Human Research Facility Holter Monitor 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 Human Research Facility Holter Monitor in 20 minutes

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

Frequently asked questions

What is Human Research Facility Holter Monitor in simple terms?

Why does Human Research Facility Holter Monitor 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 Human Research Facility Holter Monitor?

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 Human Research Facility Holter Monitor.