I’ve been trying macro photography and using the depth of field to make the subject of my photos stand out more from the background. This photo of a parrotfish shows promising results beyond “blurry fish butt” quality. I’ll definitely use this technique more often in the future, especially for colorful fish with colorful coral in the background.
As a founding member of our surf club, I’ve decided to do what what was long overdue and took my second surfing lesson.
I went to a surfschool in Scheveningen at the North Sea, got in touch with an instructor, and after going over the water situation, currents, swell and technique, we went into the water for a good one and a half hours. There was a good swell, and next to the harbour’s pier, we were mostly out of the wind. After building up some skills, like catching waves and paddling into them, I managed to ride out a few waves, onto the beach. Not over a long distance, but at least I didn’t fall for a few seconds, a few times. Pretty good progress. Next try planned on sunday, weather allowing. It’s still the North Sea, and it’s still winter, so things can get nasty…
The water temperature was 9°C, which seems cold. I wore my 7mm full-length suit, 3mm gloves and a 5mm hood. It didn’t feel cold even in my fingertops after getting out of the water, so even in March, the North Sea is already very manageable.
Surfing was great fun, it’s an interesting break from diving in that it’s much more physically active. In diving, you tend to spend as little energy on anything as possible. That means that if you’re a good diver (and in the right conditions), you actually burn very little energy. That means you’re getting cold much quicker. Bodysurfing, on the other hand means that you’re constantly moving through the swell, swimming, paddling, getting up, falling, so you end up burning a lot of energy. The cold splash of water is really welcome then.
As opposed to diving, there is no buddy system in surfing, so you can go surfing on your own (under the right conditions, of course). That makes it a bit more flexible than diving. It also trains different muscle groups, especially arms and shoulders, so it complements diving well.
Waves are awesome. :)
The calm days between christmas and new year are best celebrated with your family (of choice), so I went to Hamburg where the 33rd edition of the Chaos Computer Congress opened the door to 12.000 hackers, civil rights activists, makers and people interested in privacy and computer security. The motto of this congress is “works for me” which is meant as a critical nudge towards developers who stop after technology works for them, while it should work for everyone. A demand for a change in attitude.
The congress is a huge gathering of people to share information, hack, talk and party, and the past days have been a blast. This congress strikes an excellent balance between high quality talks, interesting hacks and electronics and a laid back atmosphere, all almost around the clock. (Well, the official track stops around 2 a.m., but continues around half past eleven in the morning.) The schedule is really relaxed, which makes it possibly to party at night, and interrupt dancing for a quick presentation about colonizing intergalactic space — done by domain experts.
The conference also has a large unconference part, hacking spaces, and lounge areas, meaning that the setup is somewhere in between a technology conference, a large hack-fest and a techno party. Everything is filled to the brim with electronics and decorated nicely, and after a few days, the outside world simply starts to fade and “congress” becomes the new reality.
No Love for the U.S. Gov
I’ve attended a bunch of sessions on civil rights and cyber warfare, as well as more technical things. One presentation that touched me in particular was the story of Lauri Love, who is accused of stealing data from agencies including Federal Reserve, Nasa and FBI. This talk was presented by a civil rights activist from the Courage foundation, and two hackers from Anonymous and Lulzsec. While Love is a UK citizen, the US is demanding extradition from the UK so they can prosecute him under US law (which is much stricter than the UK’s). This would create a precedent making it much easier for the US to essentially be able to prosecute citizens anywhere under US law.
This, combined with the US jail system poses a serious threat to Love. He wouldn’t be the first person to commit suicide under the pressure put on him by the US government agencies, who really seem to be playing hardball here. (Chelsea Manning, the whistleblower behind the videos of the baghdad airstrikes, in which US airforce killed innocent citizens carelessly, among others) who suffered from mental health issues, was put into solitary confinement, instead of receiving health care. Against that background, the UK would send one of their own citizens into a jail that doesn’t even respect basic human rights. On particularly touching moment was when the brother of Aaron Swartz took the microphone and appealed to the people who asked how they could prevent another Aaron, that helping Lauri (and Chelsea) is the way to help out, and that’s where the energy should be put. Very moving.
The media team at this event is recording most of the sessions, so if you have some time to spare, head over to media.ccc.de and get your fix. See you at 34C3!
I’ve always loved diving down while snorkeling or swimming, and it’s been intriguing to me how long I can hold my breath, how far and deep I could go just like that. (The answer so far, 14m.)
Last week, I met with Jeanine Grasmeijer. Jeanine is one of the world’s top freedivers, two times world record holder, 11 times Dutch national record holder. She can hold her breath for longer than 7 minutes. Just last month she dove down to -92m without fins. (For the mathematically challenged, that’s 6.6 times 14m.)
Jeanine showed me how to not breathe properly.
We started with relaxation and breathing exercises on dry land. Deep relaxation, breathing using the proper and most effective technique, then holding breath and recovering.
In the water, this actually got a bit easier. Water has better pressure characteristics on the lungs, and the mammalian diving reflex helps shutting off the air ways, leading to a yet more efficient breath hold. A cycle starts with breathing in the water through the snorkel for a few minutes, focusing on a calm and regular, relaxed breathing rhythm. After a few cycles of static apnea (breath holding under water, no movement), I passed the three-minute-mark at 3:10.
We then moved on to dynamic apnea (swimming a horizontal distance under water on one breath). Jeanine did a careful weight check with me, making sure my position would need as little as possible correction movements while swimming. With a reasonable trim achieved, I swam some 50m, though we mainly focused not on distance, but on technique of finning, arms usage and horizontal trim.
The final exercise in the pool was about diving safety. We went over the procedure to surface an unconscious diver, and get her back to her senses.
Freediving, as it turns out, is a way to put the world around on pause for a moment. You exist in the here and now, as if the past and future do not exist. The mind is in a completely calm state, while your body floats in a world of weightless balance. As much as diving is a physical activity, it can be a way to enter a state of Zen in the under water world.
Jeanine has not only been a kind, patient and reassuring mentor to me, but opened the door to a world which has always fascinated and intrigued me. A huge, warm thanks for so much inspiration of this deep passion!
The Ocean Warrior, the newest vessel in Sea Shepherd‘s fleet docked in Amsterdam before beginning its voyage to the Southern Ocean around Antarctica to prevent poachers from killing whales. Sea Shepherd is a marine conservation society that employs direct action to protect marine wildlife. The Ocean Warrior is a 54m custom-built vessel, hosting a crew of 16. It’s very fast, reaching almost 30 knots at top speed. It is powered by 4 3000 horse power engines, and features an open deck at the stern with a hefty water cannon.
The Ocean Warrior is an incredibly slick and strictly functional master-piece of ship engineering. Its solid build makes it a tool suitable for the extreme conditions around Antarctica.
Its unusually high top-speed will give the Sea Shepherd fleet a huge strategic advantage in the vast wideness of the Southern Ocean.
The QtCon / Akademy organizers have published the videos of last weekend’s conference presentations. If you’re interested in the topic, you can watch the video of my presentation about the KDE Software Store here:
I’ve done a facelift to my website. The new version is more mobile-friendly, modern-looking and quite a departure visually from its original look. I’ve chosen for a newpaper-like, typography-based responsive layout. My site finally also supports SSL, thanks to let’s encrypt.
We visited the CMS today, the Compact Muon Solenoid, one of the “experiments” that are part of the LHC, the large hadron collider, which is a research project aiming to find out more about the basic structures that make up our universe, like how gravity works, which particles make up our universe, and so on.
In order to do that, researchers accelerate elementary particles to almost the speed of light, make them crash into each other and record this process. There’s a 27km long circular tunnel 100m below the ground near Geneva, Switzerland (the tunnel actually extends into France, so the CMS experiment is located in France).
As we’re currently at a KDE Plasma sprint at CERN, the European Research center for nuclear energie, we were invited to a tour through the CMS. We got to learn a lot about physics and also descended down into the chamber holding the giant CMS machine. (It’s switched off currently, since energy costs during winter are too high to run it — it takes a lot of power to accelerate particles to almost the speed of light, in the range of 200 Megawatt). There’s some maintenance work going on right now before this monster is switched on again towards the end of the month.
CERN staff were friendly and patient and answered all our questions. The tour was interesting and a lot of fun.
Here are some more pictures I took during the visit. You may notice that some of the computers in the control room are running Plasma on their desktops.
More photos of my visit can be found here.