Digitalization... of what?

I've been hearing a lot about 'digitalization', or 'digital transformation', recently. What is this buzzword?

The general idea seems to be: exploit lots and lots of data (which we already have), with analytics and machine learning probably, to do a better job finding and producing fuel and energy safely and responsibly.

At the centre of it all is usually data. Lots of data, usually in a lake. And this is where it all goes wrong. Digitalization is not about data. And it's not about technology either. Or cloud. Or IoT.

Interest in the terms "digital transformation" and "digitalization" since 2004, according to Google Trends. The data reveal a slight preference for the term "digitalization" in central and northern Europe. Google Ngram Viewer indicates that the term "digitalization" has been around for over 100 years, but it is also a medical term connected with the therapeutic use of digitalis. Just to be clear, that's not what we're talking about.

It's about people

Oh no, here I go with the hand-wavy, apple-pie "people not process" nonsense... well, yes. I'm convinced that it's humans we're transforming, not data or technology. Or clouds. Or Things.

I think it's worth spelling out, because I think most corporations have not grasped the human aspect yet. And I don't think it's unreasonable to say that petroleum has a track record of not putting people at the centre of its activities, so I worry that this will happen again. This would be bad, because it might mean that digitalization not only fails to get traction — which would be bad enough because this revolution is long overdue — but also that it causes unintended problems.

Without people, digital transformation is just another top-down 'push' effort, with too much emphasis on supply. I think it's smarter to create demand, or 'pull', so that professionals are asking for support, and tools, and databases, and are engaged in how those things are created.

Put technical professionals at the heart of the revolution, and the rest will follow. The inverse is not true.

Strategies

This is far from an exhaustive list, but here are some ideas for ways to get ahead in digital transformation:

• Make it easy for digitally curious people to dip a toe in. Build a beginner-friendly computing environment, and encourage people to use it. Challenge your IT people to support a culture of experimentation and creativity. 
• Give those curious professionals access to professional development channels, whether it's our courses, other courses, online channels like Lynda.com or Coursera, or whatever. 
• Build a community of practice for 'scientific computing'. Whether it's a Yammer group or something more formal, be sure to encourage frequent face-to-face meetups, and perhaps an intranet portal.
• Start to connect subsurface professionals with software engineers, especially web programmers and data scientists, elsewhere in the organization. I think the best way is to embed programmers into technical teams. 
• Encourage participation in external channels like conferences and publications, data science contests, hackathons, open source projects, and so on. I guarantee you'll see a step change in skills and enthusiasm.

The bottom line is that we're looking for a profound culutral change. It will be slow. More than that, it needs to be slow. It might only take a year or two to get traction for an idea like "digital first". But deeper concepts, like "machine readable microservices" or "data-driven decisions" or "reproducible workflows", must take longer because you can't build that high without a solid foundation. Successfully applying specific technologies like deep learning, augmented reality, or blockchain, will certainly require a high level of technology literacy, and will take years to get right.

What's going on with scientific computing in your organization? Are you 'digitally curious'? Do you feel well-supported? Do you know others in your organization like you?

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The circuit board image in the thumbnail for this post is by Carl Drougge, licensed CC-BY-SA.

Finding Big Bertha with a hot wire

Sunday will be the 131st birthday of General Andrew McNaughton, a Canadian electrical engineer who served in the Canadian Expeditionary Force in the First World War. He was eventually appointed commander of the Canadian Corps Heavy Artillery and went on to serve in the Second World War as well.

So what is a professional soldier doing on a blog about geoscience? Well, McNaughton was part of the revolution of applied acoustics and geophysics that emerged right before and after the First World War.

Along with eminent British physicist Lawrence Bragg, engineer William Sansome Tucker, and physicist Charles Galton Darwin (the other Charles Darwin's grandson), among others, McNaughton applied physics to the big problem of finding the big noisy things that were trying to blow everyone up. They were involved in an arms race of their own — German surveyor Ludger Mintrop was trying to achieve the same goal from the other side of the trenches.

After gaining experience as a gunner, McNaughton became one of a handful of scientists and engineers involved in counter-battery operations. Using novel ranging techniques, these scientists gave the allied forces a substantial advantage over the enemy. Counter-battery fire became an weapon at pivotal battles like Vimy Ridge, and certainly helped expedite the end of the war.

If all this sounds like a marginal way to win a battle, stop think for a second about these artillery. The German howitzer, known as 'Big Bertha' (left), could toss an 820 kg (1800 lb) shell about 12.5 km (7.8 miles). In other words, it was incredibly annoying.

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Combining technologies

Localization accuracy on the order of 5–10 m on the large majority of gun positions was eventually achieved by the coordinated use of several technologies, including espionage, cartography, aerial reconnaissance photography, and the new counter-measures of flash spotting and sound ranging.

Flash spotting was more or less just what it sounds like: teams of spotters recording the azimuth of artillery flashes, then triangulating artillery positions from multiple observations. The only real trick was in reporting the timing of flashes to help establish that the flashes came from the same gun.

Sound ranging, on the other hand, is a tad more complicated. It seems that Lawrence Bragg was the first to realize that the low frequency sound of artillery fire — which he said lifted him off the privy seat in the outhouse at his lodgings — might be a useful signal. However, microphones were not up to the task of detecting such low frequencies. Furthermore, the signal was masked by the (audible) sonic boom of the shell, as well as the shockwaves of passing shells.

Elsewhere in Belgium, William Tucker had another revelation. Lying inside a shack with holes in its walls, he realized that the 20 Hz pressure wave from the gun created tiny puffs of air through the holes. So he looked for a way to detect this pulse, and came up with a heated platinum wire in a rum jar. The filament's resistance dropped when cooled by the wavefront's arrival through an aperture. The wire was unaffected by the high-frequency shell wave. Later, moving-coil 'microphones' (geophones, essentially) were also used, as well as calibration for wind and temperature. The receivers were coupled with a 5-channel string galvanometer, invented by French engineers, to record traces onto 35-mm film bearing timing marks:

McNaughton continued to develop these technologies through the war, and by the end was successfully locating the large majority of enemy artillery locations, and was even able to specify the calibre of the guns and their probable intended targets. Erster Generalquartiermeister Erich Ludendorff commented at one point in the war: 

“According to a captured English document the English have a well- developed system of sound-ranging which in theory corresponds to our own. Precautions are accordingly to be taken to camouflage the sound: e.g. registration when the wind is contrary, and when there is considerable artillery activity, many batteries firing at the same time, simultaneous firing from false positions, etc.”

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An acoustic arsenal

The hot-wire artillery detector was not Tucker's only acoustic innovation. He also pioneered the use of acoustic mirrors for aircraft detection. Several of these were built around the UK's east coast, starting around 1915 — the three shown here are at Denge in Kent. They were rendered obselete by the invention of radar around the beginning of World War Two.

Acoustic and seismic devices are still used today in military and security applications, though they are rarely mentioned in applied geophysics textbooks. If you know about any interesting contemporary uses, tell us about it in the comments.

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According to Crown Copyright terms, the image of McNaughton is out of copyright. The acoustic mirror image is by Paul Russon, licensed CC-BY-SA. The uncredited/unlicensed galvanometer trace is from the excellent Stop, hey, what's that sound article on the geographical imaginations blog; I assume it is out of copyright. The howitzer image is out of copyright.

This post on Target acquisition and counter battery is very informative and has lots of technical details, though most of it pertains to later technology. The Boom! Sounding out the enemy article on ScienceNews for Students is also very nice, with lots of images. 

Unsolved problems in applied geoscience

I like unsolved problems. I first wrote about them way back in late 2010 — Unsolved problems was the eleventh post on this blog. I touched on the theme again in 2013, before and after the first 'unsession' at the GeoConvention, which itself was dedicated to finding the most pressing questions in exploration geoscience. As we turn towards the unsession at AAPG in Salt Lake City in May, I find myself thinking again about unsolved problems. Specifically, what are they? How can we find them? And what can we do to make them easier to solve?

It turns out lots of people have asked these questions before.

I've compiled a list of various attempts by geoscientists to list he big questions in the field. The only one I was previous aware of was Milo Backus's challenges in applied seismic geophysics, laid out in his president's column in GEOPHYSICS in 1980 and highlighted later by Larry Lines as part of the SEG's 75th anniversary. Here are some notable attempts:

• John William Dawson, 1883 — Nova Scotia's most famous geologist listed unsolved problems in geology in his presidential address to the American Association for the Advancement of Science. They included the Cambrian Explosion, and the origin of the Antarctic icecap. 
• Leason Heberling Adams, 1947 — One of the first experimental rock physicists, Adams made the first list I can find in geophysics, which was less than 30 years old at the time. He included the origin of the geomagnetic field, and the temperature of the earth's interior.
• Milo Backus, 1980 — The list included direct hydrocarbon detection, seismic imaging, attenuation, and anisotropy.  
• Mary Lou Zoback, 2000 — As her presidential address to the GSA, Zoback kept things quite high-level, asking questions about finding signal indynamic systems, defining mass flux and energy balance, identifying feedback loops, and communicating uncertainty and risk. This last one pops up in almost every list since.
• Calgary's geoscience community, 2013 — The 2013 unsession unearthed a list of questions from about 50 geoscientists. They included: open data, improving seismic resolution, dealing with error and uncertainty, and global water management.
• Daniel Garcia-Castellanos, 2014 — The Retos Terrícolas blog listed 49 problems in 7 categories, ranging from the early solar system to the earth's interior, plate tectonics, oceans, and climate. The list is still maintained by Daniel and pops up occasionally on other blogs and on Wikipedia.

The list continues — you can see them all in this presentation I made for a talk (online) at the Bureau of Economic Geology last week (thank you to Sergey Fomel for hosting me!). During the talk, I took the opportunity to ask those present what their unsolved problems are, especially the ones in their own fields. Here are a few of what we got (the rest are in the preso):

What are your unsolved problems in applied geoscience? Share them in the comments!

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If you have about 50 minutes to spare, you can watch the talk here, courtesy of BEG's streaming service.

Click here to watch the talk >>>

Easier, better, faster, stronger

Yesterday I pushed a new release of bruges to Python's main package repository, PyPi.  Version 0.3.3 might not sound like an especially auspicious version perhaps, but I'm excited about the new things we've added recently. It has come a long way since we announced it back in 2015, so if you haven't checked it out lately, now's a good time to take another look.

What is bruges again?

Bruges is a...

In other words, nothing fancy — just equations. It is free, open source software. It's aimed at geophysicists who use Python.

How do you install it? The short answer is pip:

    pip install bruges

So what's new?

Here are the highlights of what's been improved and added in the last few months:

• The reflectivity equations in reflection module now work on arrays for the Vp, Vs, and rho values, as well as the theta values. This is about 10 times faster than running a loop over elements; the Zoeppritz solution is 100× faster.
• The various Zoeppritz solutions and the Aki–Richards approximations now return the complex reflectivity and therefore show post-critical amplitudes correctly.
• A new reflection coefficient series function, reflection.reflectivity(), makes it easier to compute offset reflectivities from logs.
• Several new linear and non-linear filters are in bruges.filters, including median (good for seismic horizons), mode (good for waveform classification), symmetric nearest-neighbours or snn, and kuwahara.
• The wavelets ricker(), sweep() (aka Klauder) and ormsby() wavelet now all work for a sequence of frequencies, returning a wavelet bank. Also added a sinc() wavelet, with a taper option to attenuate the sidelobes.
• Added inverse_gardner, and other density and velocity transforms, to petrophysics.
• Added transform.v_rms() (RMS velocity), transform.v_avg() (average velocity) and transform.v_bac() (naïve Backus average). These all operate in a 'cumulative' average-down-to sense.
• Added a coordinate transformation to translate between arbitrarily oriented (x,y) and (inline, line) coordinates.

Want to try using it right now, with no installation? Give it a spin in My Binder! See how easy it is to compute elastic moduli, or offset reflection coefficients, or convert a log to time.  

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Want to support the development of open source geophysics software? Here's how:

• Use it! This is the main thing we care about.
• Report problems on the project's Issue page.
• Fork the project and make your own changes, then share them back.
• Pay us for the development of functionality you need.