Sci-fi Spacesuits: Biological needs

24 Jun 2021 by Christopher Noessel

Spacesuits must support the biological functioning of the astronaut. There are probably damned fine psychological reasons to not show astronauts their own biometric data while on stressful extravehicular missions, but there is the issue of comfort. Even if temperature, pressure, humidity, and oxygen levels are kept within safe ranges by automatic features of the suit, there is still a need for comfort and control inside of that range. If the suit is to be warn a long time, there must be some accommodation for food, water, urination, and defecation. Additionally, the medical and psychological status of the wearer should be monitored to warn of stress states and emergencies.

Unfortunately, the survey doesn’t reveal any interfaces being used to control temperature, pressure, or oxygen levels. There are some for low oxygen level warnings and testing conditions outside the suit, but these are more outputs than interfaces where interactions take place.

Mission to Mars (2000), McConnell verifies that the team can remove their helmets.

There are also no nods to toilet necessities, though in fairness Hollywood eschews this topic a lot.

The one example of sustenance seen in the survey appears in Sunshine, we see Captain Kaneda take a sip from his drinking tube while performing a dangerous repair of the solar shields. This is the only food or drink seen in the survey, and it is a simple mechanical interface, held in place by material strength in such a way that he needs only to tilt his head to take a drink.

*Sunshine* (2007): Truman asks spacewalker Shelby to calm down since his vital signs are stressed.

Similarly, in Sunshine, when Capa and Kaneda perform EVA to repair broken solar shields, Cassie tells Capa to relax because he is using up too much oxygen. We see a brief view of her bank of screens that include his biometrics.

*Sunshine* (2007): Cassie warns Capa that he’s using a lot of oxygen.

Remote monitoring of people in spacesuits is common enough to be a trope, but has been discussed already in the Medical chapter in Make It So, for more on biometrics in sci-fi.

Crowe’s medical monitor in *Aliens* (1986).

There are some non-interface biological signals for observers. In the movie Alien, as the landing party investigates the xenomorph eggs, we can see that the suit outgases something like steam—slower than exhalations, but regular. Though not presented as such, the suit certainly confirms for any onlooker that the wearer is breathing and the suit functioning.

*Alien* (1979): The away team’s suit exhales as they walk the alien wreckage.
Look for the white plume in the left image and a dark plume on the right.

Given that sci-fi technology glows, it is no surprise to see that lots and lots of spacesuits have glowing bits on the exterior. Though nothing yet in the survey tells us what these lights might be for, it stands to reason that one purpose might be as a simple and immediate line-of-sight status indicator. When things are glowing steadily, it means the life support functions are working smoothly. A blinking red alert on the surface of a spacesuit could draw attention to the individual with the problem, and make finding them easier.

*The Fifth Element* (1997): Mondoshawan spacesuits have tiny lights along the exterior.

Emergency deployment

One nifty thing that sci-fi can do (but we can’t yet in the real world) is deploy biology-protecting tech at the touch of a button. We see this in the Marvel Cinematic Universe with Starlord’s helmet.

*Guardians of the Galaxy* (2012) ~~Peter~~ Starlord puts his Helmet on Gamora in space outside the Kyln.

If such tech was available, you’d imagine that it would have some smart sensors to know when it must automatically deploy (sudden loss of oxygen or dangerous impurities in the air), but we don’t see it. But given this speculative tech, one can imagine it working for a whole spacesuit and not just a helmet. It might speed up scenes like this.

What do we see in the real world?

Are there real-world controls that sci-fi is missing? Let’s turn to NASA’s space suits to compare.

The Primary Life-Support System (PLSS) is the complex spacesuit subsystem that provides the life support to the astronaut, and biomedical telemetry back to control. Its main components are the closed-loop oxygen-ventilation system for cycling and recycling oxygen, the moisture (sweat and breath) removal system, and the feedwater system for cooling.

The only “biology” controls that the spacewalker has for these systems are a few on the Display and Control Module (DCM) on the front of the suit. They are the cooling control valve, the oxygen actuator slider, and the fan switch. Only the first is explicitly to control comfort. Other systems, such as pressure, are designed to maintain ideal conditions automatically. Other controls are used for contingency systems for when the automatic systems fail.

Hey, isn’t the text on this thing backwards? Yes, because astronauts can’t look down from inside their helmets, and must view these controls via a wrist mirror. More on this later.

The suit is insulated thoroughly enough that the astronaut’s own body heats the interior, even in complete shade. Because the astronaut’s body constantly adds heat, the suit must be cooled. To do this, the suit cycles water through a Liquid Cooling and Ventilation Garment, which has a fine network of tubes held closely to the astronaut’s skin. Water flows through these tubes and past a sublimator that cools the water with exposure to space. The astronaut can increase or decrease the speed of this flow and thereby the amount to which his body is cooled, by the cooling control valve, a recessed radial valve with fixed positions between 0 (the hottest) and 10 (the coolest), located on the front of the Display Control Module.

The spacewalker does not have EVA access to her biometric data. Sensors measure oxygen consumption and electrocardiograph data and broadcast it to the Mission Control surgeon, who monitors it on her behalf. So whatever the reason is, if it’s good enough for NASA, it’s good enough for the movies.

Back to sci-fi

So, we do see temperature and pressure controls on suits in the real world, which underscores their absence in sci-fi. But, if there hasn’t been any narrative or plot reason for such things to appear in a story, we should not expect them.

Brain Scanning

17 Jan 2017 by scifihughf

The second half of the film is all about retrieving the data from Johnny’s implant without the full set of access codes. Johnny needs to get the data downloaded soon or he will die from the “synaptic seepage” caused by squeezing 320G of data into a system with 160G capacity. The bad guys would prefer to remove his head and cryogenically freeze it, allowing them to take their time over retrieval.

1 of 3: Spider’s Scanners

The implant cable interface won’t allow access to the data without the codes. To bypass this protection requires three increasingly complicated brain scanners, two of them medical systems and the final a LoTek hacking device. Although the implant stores data, not human memories, all of these brain scanners work in the same way as the Non-invasive, “Reading from the brain” interfaces described in Chapter 7 of Make It So.

The first system is owned by Spider, a Newark body modification
specialist. Johnny sits in a chair, with an open metal framework
surrounding his head. There’s a bright strobing light, switching on
and off several times a second.

Nearby a monitor shows a large rotating image of his head and skull, and three smaller images on the left labelled as Scans 1 to 3.

The largest image resembles a current-day MRI or CT display. It is being drawn on a regular flat 2D display rather than as a 3D holographic type projection, so does not qualify as a volumetric projection even though a current day computer graphics programmer might call it such. The topmost Scan 1 is the head viewed from above in the same rendering style. Scan 2 in the middle shows a bright spot around the implant, and Scan 3 shows a circuit board, presumably the implant itself. The background is is blue, which so far has been common but not as predominant as it is in other science fiction interfaces. Chris suggests this is because blue LEDs were not common in 1995, so the physical lights we see are red and green and likewise the onscreen graphics use many bright colors.

Occasionally a purple bar slides across the main image. It perhaps represents some kind of processing update, but since the image is already rotating, that seems superfluous. At one point the color of the main image changes to red, with a matching red sliding bar, but we don’t know why. All the smaller images rotate or flash regularly, with faint ticking sounds as they do.

From this system, Spider is able to tell Johnny that there is a problem with his implant and it must be painful. (Understandably, Johnny is not impressed with this less than helpful diagnosis.) Unlike either the scanner at Newark Airport or the LoTek binoculars, there are no obvious messages or indicators providing this information. But this is a specialised piece of medical technology rather than a public access system, so presumably Spider has sufficient expertise to interpret the displays without needing large popup text.

2 of 3: Hospital Scanner

Spider takes Johnny to a hospital for a more thorough scan. Here the first step is attaching a black flexible strip with various cables around his head. His implant cable is also connected.

There isn’t a clear shot of the entire system, but behind Johnny is a CRT monitor and to his left, our right, is a bank of displays that look like electronic oscilloscopes. Since embedded body electronics are common in the world of Johnny Mnemonic, that is probably exactly what they are intended to be. Spider adjusts some controls on these.

The oscilloscopes show no text, just green lines and shapes. The CRT behind Johnny is now showing the same head image that we saw at the end of the previous scan.

In front of the oscilloscopes is a PC keyboard from the 1990s. In 2021 this will look even older, but this entire hospital is portrayed as a shoestring operation relying on donations and salvage. Spider types on the keyboard, and the CRT changes to show a lot of scrolling text.

This is enough for Spider to announce that the “data” is the cure for NAS, the world wide epidemic disease that Jane is showing symptoms of. Again it’s not clear how he can determine this, as the data is still protected by the access codes. Perhaps the scrolling text is unencrypted metadata in the implant that is more easily retrieved. Given the apparent hazardous life of a mnemonic courier, it would make sense to attach the equivalent of a sticky label to the implant, briefly describing the contents and who they should be delivered to.

(This is also the point where one has to ask why this valuable data is encrypted and protected to begin with. Using a mnemonic courier for distribution makes sense, to avoid content filters on the Internet. But now the data is here in Newark, with the intended recipients, so why is it so hard to get at? The best answer I can think of is that the scientists wanted to ensure that the mnemonic courier couldn’t keep the data for themselves and sell it to the highest bidder.)

The third of the three brain interfaces warrants its own post, coming up next.

High Tech Binoculars

11 Jan 2017 by scifihughf

In Johnny Mnemonic we see two different types of binoculars with augmented reality overlays and other enhancements: Yakuz-oculars, and LoTek-oculars.

Yakuz-oculars

The Yakuza are the last to be seen but also the simpler of the two. They look just like a pair of current day binoculars, but this is the view when the leader surveys the LoTek bridge.

I assume that the characters here are Japanese? Anyone?

In the centre is a fixed-size green reticule. At the bottom right is what looks like the magnification factor. At the top left and bottom left are numbers, using Western digits, that change as the binoculars move. Without knowing what the labels are I can only guess that they could be azimuth and elevation angles, or distance and height to the centre of the reticule. (The latter implies some sort of rangefinder.)

So far, this is a simple uncluttered display. But why is there a brightly glowing Pharmakom logo at the top right? It blocks part of the view, and probably doesn’t help anyone trying to keep their eyes adapted for night vision.

LoTek-oculars

The LoTeks, despite their name, have more impressive binoculars. They’re first used when Johnny gets out of his airport taxi.

There’s a third tube above the optics, a rectangular inlet, and an antenna.

In these binoculars, the augmented reality overlay is much more dynamic. Instead of a fixed circle, green lines converge in a bounding box around the image of Johnny. Text slides onto the display from left to right, the last line turning yellow.

Zoomrect

The animated transition of the bounding box resembles what Classic MacOS programmers of the 1990s called “zoomrects” used for showing windows opening or closing. It’s a very effective technique to draw attention to a particular area of an image.

Animated text

Text appearing character by character is ubiquitous in film interfaces. In the 1960s and 1970s mainframe and minicomputer terminals really did display incrementally, as the characters arrived one by one over slow serial port links. On any more recent computer it actually takes extra programming to achieve this effect, as the normal display of text is so fast that we would perceive it as instantaneous. But people like to see incremental text, or have been conditioned by film to expect it, so why not?

Bioscanning

The binoculars detect Johnny’s implant. It might just be possible to detect this passively from infrared or electronic signals, but more likely the binoculars include a high resolution microwave radar as well. If there had been more than one person in view, the bounding box would indicate which one the text refers to. And note that the last line of text is a different color. What that means is unclear here, but it becomes clear (and I’ll discuss it) later.

The second time we see the LoTek binoculars is when a lookout spots Street Preacher, a very bad guy and another who wants to remove Johnny’s head. Once again the binoculars have performed more than just a visual scan.

The binocular view and overlay are being relayed to another character, the LoTek leader J-Bone who can watch on a monitor. Here the film anticipates the WiFi webcam.

The overlay text now changes.

Narrow AI?

This is interesting, because the binoculars can not only detect implants and other cyborg modifications, but are apparently able to evaluate and offer advice. It appears that the green text is used for the factual (more or less) information about what has been detected, while yellow text is uncertain or or speculative.

Does this imply a general artificial intelligence? Not necessarily. This warning could be based solely on the detected signature, in the same way that current day military passive sonars and radar warning receivers can identify threats based on identifying characteristics of a received signal. In the world of Johnny Mnemonic it would make sense to assume that anyone with full custom biomechanics is extremely dangerous. Or, since Street Preacher is a resident rather than a stranger and already feared by others, his appearance and the warning could have been entered into a LoTek facial recognition database that the binocular system uses as a reference.

These textual overlays are an excellent interface, not interfering with normal vision and providing a fast and easy-to-understand analysis. But, the user must have faith that the computer analysis is accurate. There’s no reason given as to why any of the text is displayed. If Johnny was carrying an implant in his pocket instead of his brain, would the computer know the difference?

An alternative approach would be some kind of sensor fusion or false spectrum display, with the raw infrared or radar image overlaid over the visuals and the viewer responsible for interpreting the data. The problem with such systems is that our visual system didn’t evolve to interpret such imagery, so a lot of training and practice is required to be both fast and accurate. And the overlay itself interferes with our normal visual recognition and processing. If the computer can do a better job of deciphering the meaning of non-visual data, it should do so and summarise for the human viewer.

Further advantages of this interface are that even a novice sentry will benefit from the built-in scanning and threat analysis, and the wireless transmission ensures that the information is shared rather than being limited to the person on watch.

Sleep Pod—Wake Up Countdown

5 Mar 2015 by Maximiliano Pena

On each of the sleep pods in which the Odyssey crew sleep, there is a display for monitoring the health of the sleeper. It includes some biometric charts, measurements, a body location indicator, and a countdown timer. This post focuses on that timer.

To show the remaining time of until waking Julia, the pod’s display prompts a countdown that shows hours, minutes and seconds. It shows in red the final seconds while also beeping for every second. It pops-up over the monitoring interface.

The thing with pop-ups

We all know how it goes with pop-ups—pop-ups are bad and you should feel bad for using them. Well, in this case it could actually be not that bad.

The viewer

Although the sleep pod display’s main function is to show biometric data of the sleeper, the system prompts a popup to show the remaining time until the sleeper wakes up. And while the display has some degree of redundancy to show the data—i.e. heart rate in graphics and numbers— the design of the countdown brings two downsides for the viewer.

Position: it’s placed right in the middle of the screen.
Size: it’s roughly a quarter of the whole size of the display

Between the two, it partially covers both the pulse graphics and the numbers, which can be vital, i.e. life threatening—information of use to the viewer.

The sleeper

At the same time the display has another user, the sleeper. Since she can’t get back or respond in any way, this display is her only way of communication. As such, the device ought to react at least as well as a person would. So while normally a pop-up should only be used to show important data that the user really must know, this case is different. The pop up is not blindly blocking information, it’s reflecting the user’s priorities at that moment. And it’s for this reason that the timer bears that much visual importance on the screen.

But the display is also a touchscreen, which you can tell from the buttons in the timer. So in case the viewer really needs to see the entire display, it would require putting the timer in a separate mode. But that would require him switch back and forth between modes to get all the data.

When the countdown finishes, the pod slides open. Julia slowly begins to recover consciousness, open her eyes and sits to take a look around the outside.

Rome wasn’t built in 99 hours.

The countdown timer shows the amount of hours, minutes and seconds until the sleeper wakes, counting backwards. We just get to see the timer —and hear it beeping— only when the sleep time is ending, so it’s likely a feature to notify any close witness that the pod is about to open.

But what if the sleeper’s biometrics start to get bad? Well, the timer does leave enough room on the screen to leave the bulk of the biometrics data. The device also has a warning for when the sleeper is in CRITICAL condition, but we don’t get to see any in-between modes. It could be helpful if the timer offered some sound cue when the sleeper has some minor issue as well, even if it isn’t as bad. Even something as simple as changing the tone of the beep could do the trick.

Did you notice that the timer has two digits to display hours? That means it can display 99 hours of remaining time. That’s a long time. I’m guessing that the display doesn’t show the countdown with that much time in advance. But in that case, when does it show the timer? If the timer looks to give a hint when a sleeper is about to wake up, you don’t really need to know the amount of hours left. A few minutes’ advance notice is enough.

Kind-of setting the timer.

Although the crew of the Odyssey could probably handle the delta sleep from the onboard computer, the display also offers some functions to control that time. It has three buttons that control the timer:

a START button
a RESET button
a CLEAR button

The timer has two small half-circles both at the top and bottom of the clock. There is a play button. The timer needs to have a way to enter a given duration, and from the mapping of those symbols I’m guessing they could work as adding and subtracting buttons —you know, press the top button to add an hour, press the bottom button to reduce an hour. But at the same time the buttons don’t have any labels to convey that—they lack either a plus symbol on the top or a minus symbol on the bottom. For what it’s worth, the only label they offer is the time magnitude of any pair of digits—hours, minutes and seconds—on the circles at the bottom. So yeah, I’m close to calling these fuidgets.

The text buttons need some consideration as well. The first two are pretty straightforward if we envision the scenario where the clock timer can be set to any given time. In that case START will start the clock and RESET will put it back to zero, as with any common timer. The odd bit is that there is still a START button while the clock is ticking. In many common timers that same button has two modes that switch according to the state of the timer: starting it when it’s paused and pausing it when it it’s playing. But the missing pause mode or button could have a purpose, perhaps waking the sleeper requires a gradual biological process that can’t be stop once it has began.

There are other problems with the third one, the CLEAR button. Although the label is somewhat misleading, the button probably acts as a way to close the pop-up of the countdown, removing it from the screen. But the real issue is what happens after that. If the user press CLEAR and the pop-up closes, there is no way of knowing if the timer keeps running in the background or if it resets back to zero. This is a major problem.

Anyhow, even if the timer did run in the background it doesn’t have much of a point in this case. I mean, there was no one around to check on Julia while she was in sleep.

A little ramble on Industrial Design

Another interesting aspect of the design of the pods is the way they open. Instead of opening or sliding the cover to one side, as more common doors and hatches, the cover of the pods is divided in the middle like a double-leaf bascule drawbridge. These covers on the pod have a hinge both at the top and bottom, so they turn outside and up of the pod when opening.

Although it may seem like an overly complicated design, it really shows its advantages when you set it in context. On the Odyssey the sleep pods are placed side by side, alongside the walls of a tube like compartment. There, the area around the center has hatches that lead to other compartments.

Within a space of those characteristics, a cover that opens or slides to the side would bring some problems. As the cover slides, when opening a pod you would be blocking the one next to it. To improve that, you could have a cover that opens up from the top or the bottom. With that you could have more than one pod closing and opening at the same time, but it also comes with drawbacks. Given the length of the pods those doors will probably cover much of the transit area around the compartments of the ship, becoming an obstacle for the movement of the crew.

This is a solution for both problems. The divided doors give plenty of space for the crew to pass through, and as the doors open up they also give room to opening or closing the pods next to each other at the same time.

Sci-fi interfaces

Stop watching sci-fi. Start using it.

Tag Archives: biomonitoring