Category: Research

Visual Cues and Decision Making

Back to visual perception. Initially, it may not seem right to focus on one human sense and not discuss the others. We are multifaceted humans. The brain takes advantage of all its senses, when they are available. We’ve evolved with amazing capabilities.

The interesting notion that certain wines taste better when accompanies by certain music is a wonderful example of how interactive our systems can be. That’s without us having any conscious control over their immediate intimate workings. Parts maybe hardwired and others soft wired and adaptable.

Vision plays a dominant part in enabling us to move around. We haven’t yet evolved echo sounding, like bats and dolphins. This is not to say that those who loose vision can’t compensate to some extent, but they don’t fly aircraft or drive fast cars or become astronauts.

My thoughts arise from exposure to several aspects of our dependency on seeing the world around us. To begin, at the early part of my career, it was indeed the process of taking sound imaging and making it usable for recognising objects. Converting the information that come back from sending sound pluses through water into an image must deal with a dynamic environment. Interpretation of such electronic images can be the difference between hitting an object at sea and avoiding it.

Later, my design work concentrated on information presented to a pilot and what happens next. That whole arena of the aircraft cockpit is one big interface. The link between the senses and the decision maker. I’m not straying into the interminable debates about human factors.

Let’s stay with the trend that’s in front of us in every walk of life. That’s the dependence on recognising and acting on information that is presented to us on a nearby screen. In so far as I know, humans didn’t evolve with this need to relate acutely to closely presented information as much as reacting to distant stimulus. Afterall if a hostile animal or dangerously armed person was heading towards me at speed, I wouldn’t sit around debating the subject.

Aeronautics has experience in this shift of attention. At the start of my career aircraft cockpits where mostly knobs and dials. Mechanical indicators and filament bulbs. Sometime unreliable. Still the idea of flying by the “seat of the paints” prevailed. That centred around situation awareness, predominantly guided by looking out of the window. At the outside world. Distant vison equally, if not more, important as looking two feet ahead at a panel. Over the last five decades the above has changed radically. Instruments are large flat screens dotted with an array of colourful symbols offering every aspect of “situation awareness”.

Now, this is happening to cars. Most new cars have electronic screens. The expectation is that we humble humans have transitioned from simple mechanical dials to a fascinating world of colourful animated markers and whizzy logos. Despite the glorious technology the basic function remains the same. That is the link between the senses and the decision maker.

Adequate levels of visual perception being the number one attribute a pilot or driver is expected to maintain. This continues to be true as automation does more and more. What maybe a long-term trend in human evolution is that shift between the importance of what’s a couple of feet away and what’s in our surroundings. Will we become less sensitive to a personal experience of what’s more that two feet away? I wonder.

Future of Engineering

I do find it astonishing that back in the early 1990s I was still producing handwritten material that then got typed up by a typist. Then, were edits and errors needed correcting, “cut and paste” really meant cutting and pasting paper. Applying Tipp-Ex correction fluid was normal. Wonder who uses that now? It’s still available.

Engineering practice adopted word processing rapidly from that time on-ward. It’s now almost inconceivable that anyone would get someone else to type up their work. Early lap-top computers that weighted heavily on the shoulders, were carried to meetings as necessity but not love. The joys of trying to find a printer that would work was a daily mission.

In about 30-years we’ve gone from that primitive introduction to the digital realm to machines that want to write papers and reports for us. From brick like “portable” computers that required cables and batteries that drained in minutes to the complete world being available on-line anywhere on the globe.

The mechanisms by which engineering design and development were done have advanced in such a way as to make the past seem rather curious. I’m not saying that we’ve become ever cleverer and more inventive with the passage of time, just that the speed of trail and error has increased dramatically.

Past mechanisms did make the ability to change a path, once set on that path, difficult. I remember the reluctance to introduce changes unless an overwhelming case could be made. In this new situation, making changes still has a cost associated with it, but the resistance to change isn’t so much driven by the processes used.

What’s happing, like it or not, is that artificial intelligence’s transformative impact is touching, or will be touching, everything we do. That includes engineering design and development.

I’d say it’s a good time to be an innovator. In theory, it should be possible to explore many more possibilities that could be explored in the past. That is for the same level of cost in time and money. There’s not a single part of engineering practice that will not be impacted. Classrooms, meeting rooms and workplaces where the business of communicating technical ideas and testing them goes on, will be fertile ground for the application of AI.

I don’t think we understand just how transformative the impact will be on engineering. It’s not all upside either. Technology’s promises are great. There are perils too.

AI can only know what it’s been trained on. That maybe extremely extensive. However, innovation comes from creativity and inventiveness where the past may only be a partial guide. Also, there’s the danger of overreliance on these almost magical tools too. New skills must develop to be critical and knowledge of the deficiencies of complex algorithms.

All of this is a bit different from paper, correction fluid, scissors and tape. What an exciting time to be a young engineer.

International Collaboration in Space

It’s only taken 20,000 years for Homo sapiens to migrate to the American continent and then decided to industrialise the Moon. Just imagine what the next 20,000 years has in store.

Putting nuclear power on the Moon is a possible enabler for a future Moonbase. Considering the length of time it has taken since the last footsteps on the Moon, a Moonbase is long overdue. That said, going to a faraway place where there’s an abundance of solar energy potential it’s an interesting development that nuclear power is given a priority.

My view is that exploration beyond Earth is a matter for the whole of humanity. Going to the Moon should be an international endeavour. There’s good reason to cooperate when it comes to exploration. For a start space exploration is incredibly hard to do. Rockets explode with an unsettling degree of frequency.

Modern humans have gone from tens of thousands on one continent to what may top ten billion on Earth. It’s no wonder space, the final frontier, beckons. Trouble is we have evolved as specialist on this planet. Not well adapted to the space environment. If our wandering species is to venture into the void, we need to be mighty determined. This will be hard. The hardest effort ever made.

It would be absurd for individual nations to establish separate camps on the Moon. The space race is a concocted nonsense. More flag waving PR than serious sense. Why do I say this?

One: Demand on resources, to build, develop and maintain, a space presence is high. Sharing costs has benefits when planning for the long-term. Continuing costs can be volatile.

Two: In the event of the almost inevitable failures and setbacks, better to have partners to create different ways and means to recover or mount rescues in the worst-case scenarios.

Three: Partners can specialise. Not everyone has to do everything all the time. Afterall, that’s how our modern society came about in the first place.

Four: Cooperative planning means more gets done at the same time. Duplication and fragmentation of efforts don’t serve the great goal of exploration.

Five: Earth’s people are interconnected and interdependent. Even small Moon based colonies will inevitably be the same. Reliant on connections, locally as much as to a distant home.  

As a spin off, making exportation an international endeavour can bring us together on this divided planet too. 

What’s in a box?

I didn’t have a jack-in-the-box as a toy. Springing into life at the flick of a catch. For the larger part frightening the living daylights out of a young child. Or is it play, and thus basic training that surprising events can be scary and fun? Early days of leaning to handle risks.

In this case my boxes are square. Although they don’t need to be square. They are square or rectangular on a ballot paper (usually). These boxes are a boundary within which a mark is put to say “yes” this applies or “no” this is does not apply. Naturally, that can be the other way around too. For that matter they can indicate all sorts of conditions or views.

Here’s my beef. Back in March, this year, me and the Sun developed our relationship. There’s the giveaway – year. My number of years on Earth clocked up to sixty-five. At the time, I didn’t think of this as any more significant than past birthdays as a man of mature years. Then I got to completing numerous questionaries. Yes, I have moved the subject to more stuff to do with data and its use. Collecting data has never been so popular.

Never in the whole of human history have we, you and me, been faced with so many questionnaires. Almost every time I buy a coffee, and use a card of App to collect points, next day my in-box has an e-mail with a survey. Most of these I just ignore. Now and then, I fill one in with the ridiculous idea that the insignificant draw prize they offer could come my way.

Please offer your feedback in this short survey. The number of minutes they say that are needed are never right. Then they, the collectors of my data, get greedy. Asking for “as much detail as possible”. At this point I want to say – get real. What’s even worse is clicking on the “Next” button and then an error message comes up saying “This is required”. What audacity. Checky. Pushing my good will to its limits. If there were questionnaires about questionnaires, when it asked: “please tell us how your experience was on this occasion” they would get more than 100 creative words.

All this said, my real beef is to do with the collection of personal data. There’s no obligation to provide such data, when it comes to marketing surveys. This is when the incentivising possibility of a prize comes in. Afterall this data is valuable to the collectors with little incentive for a respondent to offer it. Surveys with prizes must have published terms and conditions. I wonder if anyone ever reads these legal niceties.

To the point. One question that often gets asked is – tick the box appropriate to my age. What I’ve noticed is that several of these unsolicited surveys have a box marked sixty-five and over. It’s like a whole section of the population is piled into one big bucket. Like we all fall off the end of the bell curve. Over 11 million people in England and Wales are like one.

I’m part of a growing cohort. That maybe good or bad but it is the case. It’s the case too that my cohort spends. Again, for good or bad, we are the beneficiaries of some good fortune. However, marketing surveys continue to sit in the stone age. At both ends of the demographic bell curve, toddlers and more mature folk, we are viewed as the same, one big bucket. I imagine data collectors and the designers of surveys have wrestled with this one. Whatever, the results don’t sit well with me.

Data Interpretation

More on that subject of number crunching. I’m not so much concerned about the numerous ways and means to produce reliable statistics as the ethical factors involved in their production.

Two things. One is the importance of saying truth to power and the other the importance of seeing things as they really are rather than how you or I would like them to be.

Starting with the first. If ever it was a hard day to say this but asserting truth is not one of several options, it’s the best option.

Whatever any short-term gains there are in distorting a description of a current situation, in the longer term the truth will out. Now, that may not have always been so. It’s often said that the victors write history. That famous view had some validity when literacy was not universal or when texts were chained in church libraries. Now, information speeds through the INTERNET (and whatever its successor will be). Controlling or supressing information has become like trying to build a castle out of sugar on a rainy day.

The second factor is more troublesome and, for that matter, more difficult. It could be the tug of war between subjectivity and objectivity. What we see is so much dependent upon the observer. What we hear is conditioned by what we’ve heard in the past.

I saw this often in the interpretation of a written narrative. Aviation accidents and incidents are reported. Databases full of multivarious reports of different origins siting there waiting to be read. This is a good thing.

It’s the choice of language that shapes our understanding of past events. That can be voluminous and contradictory. It can be minimalist and ambiguous. It can have peculiar expressions or fuzzy translations. Even if reporters are asked to codify their observations, with a tick box, there remains wide margins.

The writer of a story often knows what they want to say. It might be obvious to them what happened at the time of writing. Then it’s the reader who takes that up. A text could be read years later. Read by many others. Similar stories may exist, all written up differently. Hopefully, slight variations.

Seeing things as they really are, rather than how you would like them to be, without bias, requires more than a degree of care. A great deal of care.

It’s hard enough for an enlightened and skilled analysist to take a sentence and say “yes” I know exactly what happened. Not just what but all six of these – who, what, were, when, how and why. In future, the artificial intelligence tools that get used by authorities will have the same challenge.

For all our technological wonders, it’s the writers of reports that shapes our understanding. From a couple of sentences to a massive dissertation.

Try telling that to a maintenance engineer whose last job of the day, before going home, is to file an occurrence report after a terrible day at work. In a damp hanger with a job only half done. Tomorrow’s troubles looming.

POST: Rt Rev Nick Baines and his Thought for the Day on BBC Radio 4 is thinking the same this morning. Truth is truth. In his case it’s Christian truth that he has in mind. There lies another discussion.

Exploration and Innovation

Is there a human on the planet who has never seen the Moon? I guess, there must be a small number. The Earth’s satellite comes and goes from the night sky. Its constancy can’t be denied. Lighting the way when it’s full.

Accurate measurements say that the Moon is drifting away from us. The pace is nothing to be concerned about. It’s not going to become a free flying object careering across the universe. Space 1999[1] is pure fiction. Let’s face it we haven’t even got a working Moon Base here in 2025.

What motivated humans to go to the Moon in the 1960s? The simplest answer is the explorer’s quote: because it’s there. A quote that can be applied to any difficult journey that’s being taken for the first time. It implies a human longing to explore. An insatiable desire to go where no one has gone before. That’s nice, only it’s a partial story.

Technology accelerated in the post-war era as science and engineering built upon the discoveries and inventions that conflict drove. Then the promise of peace dissolved into the Cold War. Sides arranged in immoveable ideological opposition. The technological race was on. Intense competition drove the need to be display global superiority.

Potentially destructive forces were, for once, channeled into a civil project of enormous size. The Apollo missions. The aims and objectives of which were “civil” in nature, however the resulting innovations had universal applications. Companies that made fighter jets and missiles turned their hands to space vehicles. Early rockets were adaptations of intercontinental missiles.

1969’s moon landing put down a marker in history that will be talked of in a thousand years. Putting humans on the Moon for the first time is one of the ultimate firsts. That first “small step for man” may be as important as the first Homo sapiens stepping out of Africa. A signpost pointed to what was possible.

More than five decades have gone by. Instead of looking up to the heavens we now look down to our mobile phones. Rather than applying our intelligence to exploration we strive to make machines that can surpass us. Of course this is not a true characterisation. Exploration has merely taken a different a direction.

Will humans step into the final frontier again? Yes, but not as the number one priority. Plans to return to the Moon exist. It’s the intense competition that drove the Apollo missions that is missing. The advantage of being first to establish a working Moon Base is not so overwhelming. Even this base as a stepping stone to the planet Mars is viewed as a longer term ambition.

One advantage of this century over the last is the advances in automation and robotics that have become commonplace. Modern humans don’t need to do everything with our hands. Complex machines can do much of the work that needs to be done. Footsteps on another planet can wait a while.

Enough of us continue to be amazed and inspired by space exploration. The challenge is not to achieve one goal. It’s to achieve many.

POST: I watched Capricorn One, the 1970s movie about a fake Mars mission. It could do with a remake. In many ways it is easier to fake now than it was with film and colour televisions the size of washing machines.

[1] https://www.imdb.com/title/tt0072564/

Discovering Tomorrow

Daily writing prompt
What are you most excited about for the future?
View all responses

As an engineering guy who’s made a living out of technology (mostly aerospace) you may think that I’d pipe-up with the super shiny stuff that fills the pages of WIRED[1]. I know that’s a media brand but it’s a mighty strange name in a time when traditional wiring is falling out of fashion. My high-speed INTERNET gets to me by light.

Technology is an enabler. It’s not the answer. I’m not going to get terribly excited about “1” and “0” or even qubits[2]. Technology is a means to an end. Yes, it is transformative. We are where we are because of it. Technology opens possibilities.

I’m excited about ideas. It will be a light blub moment or years of hard work that will bring about the step changes that may make life in the future unrecognisable from today. Being a glass is half full thinker, I’m excited about how the human imagination will flourish in the future. I don’t see a dark sky and a dystopia of brainy robots marshalling us around. Even with our accumulated knowledge we are mostly ignorant about how the universe works. Be excited about the future because there’s so much to discover.

[1] https://www.wired.com/

[2] https://www.ibm.com/think/topics/quantum-computing

Probabilistic Predictions

Uncertainty is the only certainty. Not a radical statement. As long as I live, dealing with uncertainty is inevitable. Unavoidable everywhere. I wouldn’t have it any other way, even if it can be uncomfortable.

Prominent Ancient Greeks may have travelled to Delphi for advice as to what the future may hold. There’re those three enigmatic witches who warn Macbeth of his fate. History and fiction are littered with references.

For me, I can pick-up a newspaper and look for a daily astrological prediction. One I like. I can flick around social media and see more prophecies than ever. Mostly gibberish. There are those convinced of their foresight.

Despite a cynical disposition towards the above, science can be applied to the world of uncertainty. Generally, the proposition is that an element of the past and present will be reproduced in the future. This is not absolute. However, human engineered systems tend to behave with a degree of predictability.

Empirical methods, where society collects data from the past and present, can be useful in trying to forecast what may happen next. The more deterministic the systems under study, the more useful acquired data can be. For these, forecasting challenges mount for the new, novel, or radically altered.

I’m writing this given the interest there is in probabilistic safety. There are figures that hit the headlines that are almost incompressible. If the rationale behind the numbers is not clear then incorrect assumptions result. Tiny numbers from 1 x 10-6 to 1 x 10-9 are quoted in the News (SI Units). What do they mean? Let’s start with simple probability.

If an occurrence is certain then a numerical value of “1” can be given to it.

Absolute certainty is a rare thing. I can say that the Sun will rise tomorrow, and most people will take that as a statement of certainty. Intriguingly there’s the most incredibly improbable case where the solar system is thrown into instability and the Sunrise isn’t as expected.

If an occurrence never happens then a numerical value of “0” can be given to it.

Absolute impossibility is only possible with absolute knowledge. So, again it’s rare. I can say that human time-travel, to and from the distant past, is only fiction to next discover that a way has been found.

Let’s say we live in a world where the probability of occurrences ranges from the 0.99999, with ever more “9s”, to a number as small as 1 x 10-30[1]. A quecto.

These extreme numbers are nice for physicists and astronomers to play with, but they are outside normal engineering practices. As yet, we do not have the means to operate at the level of these limits. Time will tell. Or I maybe wrong.

By the way, I used the word “occurrence” above to denote anything that can happen in an instant. When talking about undesirable happenings, that can mean an incident, accident, mishap, slip, failure, or error. Each of these has a definition. Often more than one.

Next. I’ll go back to the tiny numbers more commonly quoted.

POST: For extraordinary numbers we need look no further than the nimble electron. So far, the best measurement for the life of an electron suggests that one now will still be around in 66,000 yottayears (6.6 × 1028 yrs). That’s about 5-quintillion times the current age of our universe. 

[1] https://www.nist.gov/pml/owm/metric-si-prefixes

Avoiding Contrails and Enhancing Operations

Here I’m expanding on my earlier words on aircraft Contrails.

Airspace is a busy place. It’s most busy over Europe and the US. Over the oceans there’s more room, although on certain routes, like the North Atlantic, there’s plenty of daily air traffic.

Those who manage the airspace are primarily concerned with ensuring that aircraft collisions do not occur. The impact of mid-air collisions is devastating. There’re few people in aviation who can forget the events of an evening in July 2002. Over Überlingen, Germany[1], 71 people lost their lives at a time when the sky was not busy at all.

Managing the use of airspace is more than collision avoidance. Flying is perpetually concerned with the weather. What’s it doing, how is it changing and is it a hazard? It’s not just the safety of flying that demands up-to-date meteorological information. Knowing about the winds can enable more efficient operations, and that’s less fuel use for a given route.

Large thunderstorms need to be avoided. Regions of the world (example: intertropical convergence zone) make this a dynamic challenge. Manoeuvres may be planned but flight crews must be ready to act based on the information they have, like weather radar.

Turbulence is another phenomenon to be avoided, if possible. This can occur in clear air. It can be difficult to detect. Which explains the unpleasant examples that hit the News now and then[2].

Back in 2010, aviation had a reminder that avoidance encompassed any hazardous airspace. That was when an unpronounceable volcano in Iceland was spewing out ash at high altitudes. Plumes of volcanic ash, if ingested into aircraft engines, can cause major difficulties.

I’ve written these words to emphasise that the avoidance of contrail formation cannot be done as a stand-along consideration. It becomes one factor in a whole mix of factors.

Avoidance of contrail formation is about considering the mechanism that cause them to form. Clearly, the warmer the air is the harder it is for a contrail to form. The more humidity there is in the air, the easier it is for a contrail to form. Outside Air Temperature (OAT) and atmospheric humidity vary at each altitude. That relationship interacts with the aircraft inflight, and the outcome may be different for each aircraft type.

At least one academic study[3] says that adjustments of aircraft altitude of around 2000 ft could have a useful effect on contrail formation. That’s good to know but let’s not forget that Reduced Vertical Separation Minima (RVSM) [4] means a vertical spacing of 1000 ft in busy airspace.

My take on this fascinating subject is that there both a tactical and operational approach that can be practically taken by aviation.

At the tactical level, airlines can factor contrail avoidance into flight planning. Creating an algorithm that will weigh all the relevant flight factors. Improved sources of accurate and timely meteorological data and predictions will be needed.

At the operational level, it’s down to the flight crews to take advantage of environmental conditions as the opportunity arises. Much as dealing with turbulence, that is when safety and operational rules permit. To change altitude when its beneficial, computational help is likely to be needed. Over the ocean, air-ground communications systems may need to be further improved. An altitude change that avoids contrail formation but increases fuel consumption would not be a sustainable solution.

These computational tasks may well be well suited to machine learning. A useful application of artificial intelligence. I can imagine a cockpit weather radar display with a new set of symbology that indicates a low probability contrail formation zone ahead.

[Back in the 1990s, I worked on RVSM when the ARINC organisation was creating international standards. Safely increasing traffic in the North Atlantic region. Additionally, I participated in the certification of Future Air Navigation System (FANS) 1/A for use over the ocean. FANS led to more efficient aircraft operation due to shorter flying times and decreased fuel burn.]

POST: Looks like data crunching is underway Flight plans, but greener: The ICCT and Google’s mission to refine the Travel Impact Model – International Council on Clean Transportation

[1] https://www.bfu-web.de/EN/Publications/FinalReports/2002/Report_02_AX001-1-2_Ueberlingen_Report.pdf?__blob=publicationFile&v=1

[2] https://www.flightglobal.com/safety/turkish-777-rapidly-descended-during-crews-aggressive-response-to-turbulence-encounter/162937.article

[3] https://www.imperial.ac.uk/news/195294/small-altitude-changes-could-contrail-impact/

[4] https://skybrary.aero/articles/reduced-vertical-separation-minima-rvsm

Understanding Contrails

Crisscrossing the sky, as I look up on a clear day, there are civil aircraft going about their business. People travelling across the Atlantic or coming back or on a day trip to Glasgow.

These shiny pinpoints of light in motion, set against a blue sky, are all the more visible because of the vapour trails they leave behind. Aircraft speed through the rarified atmosphere to leave a momentary trail as evidence of their presence.

Up with the aircraft in flight are natural clouds. Up at 30,000 feet there can be Cirrus clouds[1]. There might not be much air pressure at that altitude but there’s enough moisture to support cloud formation. The word “wispy” sums them up.

Aircraft create condensation trails that are known as contrails. How the English language likes to shorten. They are not mysterious or generate with evil intent in mind. It’s simple physics.

In my bathroom, with hot water gushing from the shower, moisture is the air. When that moist air meets a cold surface, like a window, condensation is sure to be seen. Airbourne it’s not so different. Hot emissions from powerful jet engines shooting out into a cold low-pressure environment and guess what?

Typically, contrails don’t last long. If there’s appreciable wind at high altitude, then they get dispersed quickly. Not only that but the icy temperatures up there soon return things to the status-quo. There are days, when the air is still, that the sky can become a crisscross of contrails where dispersion is more like a gentle merging.

The theory goes that the cumulative impact of lots of high-altitude flying is like the impact of additional cloud formation. It’s water vapour after all. It’s known, high altitude clouds can contribute to the greenhouse effect.

The point I’m getting to here is that lots of flying contributes to climate change. Primarily because of the burning of significant amounts of fossil fuel. As a secondary consideration there’s the issue of contrails across the globe.

This leads to the question – can their formation be avoided? Even, is there something useful to be gained in doing so. Trials and research are trying to establish the answer to these questions[2].

Initially, contrail avoidance sounds like it should be relatively easy to do. However, like so many good proposals it’s not so easy. Change needs to involve air traffic management, flight operations and international regulators.

First the atmospheric conditions need to be detected or predicted in a given location and then an avoidance needs to be planned and undertaken in coordination with everyone flying at high altitude at a given time. Lost of data to crunch.

It’s possible, in oceanic airspace, a dynamic aircraft system could perform this avoidance function. It would be an interesting design challenge for an avionics company to take up.

#Net Zero #SustainableAviation

[1] https://weather.metoffice.gov.uk/learn-about/weather/types-of-weather/clouds/high-clouds/cirrus

[2] https://news.aa.com/esg/climate-change/contrail-avoidance/