Fresh Paint Or Patina Of Ages, That’s The Antique Question

July 30, 2021 by Jenny List 46 Comments

The world of antique furniture and the world of hackers rarely coincide, and perhaps the allure of the latest tech is greater for most of us than that of a Chipendale cabinet. But there are times when there are analagous situations in both worlds, so it’s worth taking a moment to consider something.

This late-17th-century dressing box would not be of such value or interest were a restoration to strip it of its patina. Daderot, CC0.

Antique furniture has survived for hundreds of years before being owned by today’s collectors. Along the way it picks up bumps and scrapes, wear, and even the occasional repair. Valuable pieces turn up all the time, having been discovered in dusty attics, cowsheds, basements, and all sorts of places where they may have been misused in ways that might horrify those who later pay big money for them. Thus there is a whole industry of craft workers in the field of furniture restoration whose speciality lies in turning the wreck of a piece of furniture into a valuable antique for the showroom.

The parallel in our community if you hadn’t already guessed, can be found in the world of retrocomputers. They are the antiques we prize, they come to us after being abused by kids and then left to languish in a box of junk somewhere. Their capacitors are leaking, their cases may be cracked or dirty, and they often possess the signature look of old ABS mouldings, their characteristic yellowing. This is caused by the gradual release of small quantities of bromine as the fire retardant contained within the plastic degrades under UV light, and causes considerable consternation among some retrocomputing enthusiasts. Considerable effort goes into mitigating it, with the favourite technique involving so-called Retr0bright recipes that use hydrogen peroxide to bleach away the colour.

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Avoiding Repetitive Stress Injury: Invest In Yourself Now, Or Pay Later

July 22, 2021 by Kristina Panos 49 Comments

There I was, thirty years after I first sat down at an Apple IIe , and I suddenly found myself wondering if I would ever use a computer again without pain. How could I work if I couldn’t use a computer anymore? I had to seriously ask myself this question. It took a bit of a winding road to figure out what was going on and two EMGs to confirm it, but after all these years, it was clear to the medical community that I had developed a repetitive stress injury (RSI) called cubital tunnel syndrome in my left arm.

Yeah, it’s about like that. Image via Kinesis

Cubital tunnel syndrome is like carpal tunnel, but in your elbow instead of your wrist. What a misnomer! Sometimes my pain went all the way from my armpit to my fingertips and made me want to gnaw my own arm off. I don’t think you can really understand neuropathy unless you’ve felt this weird, annoying type of pain firsthand. I hope you never do.

Can you stop and seriously imagine not being able to use a computer for the rest of your life? Or at least feeling that way because doing so causes incredibly annoying pain? I feel like we’re all vaguely aware of the standard list of anti-RSI precautions, but let’s review:

maintain good posture — sit with feet flat on the floor, wrists straight, elbows at 90°
put the screen an arm’s length away at eye level
take frequent short breaks

Yes, those are all fine and good. But there are other things you can do to avoid computer-related RSIs, like using ergonomic inputs, and building a custom setup that fits you exactly. This isn’t a study kiosk at the university library we’re talking about — this is your battlestation! The problem is that many people are stubborn, and won’t go out of their way to do anything to proactively prevent these injuries. But you don’t have to cross a bridge when you come to it if you have a map that shows you a way around the body of water.

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What Exactly Is A Gaussian Blur?

July 21, 2021 by Lewin Day 29 Comments

Blurring is a commonly used visual effect when digitally editing photos and videos. One of the most common blurs used in these fields is the Gaussian blur. You may have used this tool thousands of times without ever giving it greater thought. After all, it does a nice job and does indeed make things blurrier.

Of course, we often like to dig deeper here at Hackaday, so here’s our crash course on what’s going on when you run a Gaussian blur operation. Continue reading “What Exactly Is A Gaussian Blur?” →

A Look Back On A Decade Of Kerbal Space Program

July 19, 2021 by Tom Nardi 24 Comments

Just a few weeks before Atlantis embarked on the final flight of the Space Shuttle program in 2011, a small Mexican company by the name of Squad quietly released Kerbal Space Program (KSP) onto an unsuspecting world. Until that point the company had only developed websites and multi-media installations. Kerbal wasn’t even an official company initiative, it started as a side project by one of their employees, Felipe Falanghe. The sandbox game allowed players to cobble together rockets from an inventory of modular components and attempt to put them into orbit around the planet Kerbin. It was immediately addictive.

There was no story to follow, or enemies to battle. The closest thing to a score counter was the altimeter that showed how far your craft was above the planet’s surface, and the only way to “win” was to put its little green occupant, the titular Kerbal, back on the ground in one piece. The game’s challenge came not from puzzles or scripted events, but from the game’s accurate (if slightly simplified) application of orbital mechanics and Newtonian dynamics. Building a rocket and getting it into orbit in KSP isn’t difficult because the developers baked some arbitrary limitations into their virtual world; the game is hard for the same reasons putting a rocket into orbit around the Earth is hard.

Over the years official updates added new components for players to build with and planets to explore, and an incredible array of community developed add-ons and modifications expanded the scope of the game even further. KSP would go on to be played by millions, and seeing a valuable opportunity to connect with future engineers, both NASA and the ESA helped develop expansions for the game that allowed players to recreate their real-world vehicles and missions.

But now after a decade of continuous development, with ports to multiple operating systems and game consoles, Squad is bringing this chapter of the KSP adventure to a close. To celebrate the game’s 10th anniversary on June 24th, they released “On Final Approach”, the game’s last official update. Attention will now be focused on the game’s ambitious sequel, which will expand the basic formula with the addition of interstellar travel and planetary colonies, currently slated for release in 2022.

Of course, this isn’t the end. Millions of “classic” KSP players will still be slinging their Kerbals into Hohmann transfer orbits for years to come, and the talented community of mod developers will undoubtedly help keep the game fresh with unofficial updates. But the end of official support is a major turning point, and it seems a perfect time to reminisce on the impact this revolutionary game has had on the engineering and space communities.

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Recycling Will Be Key To The Electric Vehicle Future

July 15, 2021 by Lewin Day 114 Comments

Electric vehicles have become a mainstay in the global automotive marketplace, taking on their gasoline rivals and steadily chewing out their own slice of market share, year after year. Government mandates to end the sale of polluting internal combustion engine vehicles and subsidies on cleaner cars promise to conspire to create an electric vehicle boom.

The result should be much cleaner air, as generating electricity in even the dirtiest power plants is far cleaner and more efficient than millions of individual engines puttering about the place. However, if the electric car is to reign supreme, they’ll need to be built in ever greater numbers. To do that is going to take huge amounts of certain materials that can be expensive and sometimes in very limited supply. Thus, to help support the EV boom, recycling of these materials may come to play a very important role.

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Black Starts: How The Grid Gets Restarted

July 15, 2021 by Dan Maloney 96 Comments

Gripped as we are at the time of this writing by a historic heatwave, it’s hard for those of us in the western United States to picture a time when cold and ice reigned across the land. But really, it was only about four months back that another bit of freakish weather was visited across most of the country, including places ill-equipped to deal with the consequences. The now-fabled “February Freeze” left millions, mostly in Texas, scrabbling about in the dark and cold as a series of cascading engineering failures took apart their electrical grid, piece by piece, county by county.

The event has been much discussed and dissected, as an event with such far-reaching impact should be. Like much discussion these days, precious little of it is either informed or civil, and that’s not good news for those seeking to understand what happened and how to prevent it from happening again, or at least to mitigate the effects somewhat. Part of that is understandable, given the life-disrupting and often life-threatening situations the disaster forced people to suddenly face. It’s also difficult for people to discuss an event so widespread in its scope and impact — there’s just too much for anyone to wrap their head around.

To make the present discussion a little easier, we’ll be focusing on one aspect of the February grid crash that’s often bandied about but rarely explained: that the Texas grid was mere minutes away from collapsing completely, and that it would have taken weeks or months to restore had it been able to slip away. Is that really possible? Can the power grid just “go away” completely and suddenly? The answer, sadly, is yes, but thankfully a lot of thought has been put into not only preventing it from happening but also how to restart everything if it does happen, by performing what’s known as a “Black Start.”

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As Chinese Wheels Touch Martian Soil And Indian Astronauts Walk Towards The Launch Pad, Can We Hope For Another Space Race?

July 12, 2021 by Jenny List 34 Comments

If you were born in the 1960s or early 1970s, the chances are that somewhere in your childhood ambitions lay a desire to be an astronaut or cosmonaut. Once Yuri Gagarin had circled the Earth and Neil Armstrong had walked upon the Moon, millions of kids imagined that they too would one day climb into a space capsule and join that elite band of intrepid explorers. Anything seems possible when you are a five-year-old, but of course the reality remains that only the very fewest of us ever made it to space.

Did You Once Dream Of The Stars?

The Soviet cosmonaut Yuri Gagarin in Finland in 1961. Arto Jousi, Public domain.

The picture may be a little different for the youth of a few decades later though, did kids in the ’90s dream of the stars? Probably not. So what changed as Shuttle and Mir crews were passing overhead?

The answer is that the Space Race between the USA and Soviet Union which had dominated extra-terrestrial exploration from the 1950s to the ’70s had by then cooled down, and impressive though the building of the International Space Station was, it lacked the ability to electrify the public in the way that Sputnik, Vostok, or Apollo had. It was immensely cool to people like us, but the general public were distracted by other things and their political leaders were no longer ready to approve money-no-object budgets. We’d done space, and aside from the occasional bright spot in the form of space telescopes or rovers trundling across Mars, that was it. The hit TV comedy series The Big Bang Theory even had a storyline that found comedy in one of its characters serving on a mission to the ISS and being completely ignored on his return.

A few years ago a Chinese friend at my then-hackerspace was genuinely surprised that I knew the name of Yang Liwei, the Shenzhou 5 astronaut and the first person launched by his country into space. He’s a national hero in China but not so much on the rainy edge of Europe, where the Chinese space programme for all its progress at the time about a decade after Yang’s mission had yet to make a splash beyond a few space watchers and enthusiasts in hackerspaces. But this might be beginning to change.

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