Category Archives: geeky

How long would you last in space without a suit?

Here is an article discussing how long a person could survive in space without a protective suit on.

The short answer is – not long: about 15 seconds.

There are several ways that you could die in these circumstances:

  • If you try to hold your breath in the vacuum of space your lungs will rupture and you’ll get a mean case of the bends.
  • If you don’t hold your breath (breathe out as much as you can), you’re not going to last too long either.
  • Because of the very low pressure moisture would start to boil. For instance:

    “One NASA test subject who survived a 1965 accident in which he was exposed to near-vacuum conditions felt the saliva on his tongue begin to boil before he lost consciousness after 14 seconds.”

  • There are also some pretty extreme temperatures in space: -130 C to 90 C. However, in a vacuum the body loses heat very slowly so this is unlikely to kill you too quickly.
  • Finally, the article mentions a “spake hickey”:

    “Caused from the swelling and bursting of the skin’s small blood vessels”

Galaxy classification by the crowd

Galaxy Zoo is a cool site that gets people to classify thousands of telescope photos of distant galaxies. You get some quick training, pass a test and then start classifying galaxies for them.

From the site:

The project harnesses the power of the internet – and your brain – to classify a million galaxies.
You’ll view parts of the Universe that literally no-one has ever seen before (the photos are taken by a robot and analysed by a computer).

The idea is that if real people are doing the classifications then:

  • They will get a pretty accurate classification
  • Anything really interesting will be brought to their attention

Also, all this raises awareness which is pretty cool.

I classified a few – this is the most interesting one that I saw. See explanation below if you really want to.

No – that’s not a UFO it’s the path of a satellite.  It is a streak because the telescope has a long exposure to get as much light as possible.  It’s blue because the telescope actually takes 3 pictures – one for red, one for green, and one for blue and then combines them.  The satellite passed while the telescope was taking the blue frame.

Mona Lisa redrawn in Microsoft Paint

It’s strange what some people get good at. People will spend thousands of hours getting unbelievably good at strange things. This is another example of that.

This guy is able to draw a superb rendition of the Mona Lisa in Microsoft Paint – the rubbishy picture editing program that comes with Windows. There are other amazing examples of pictures done in the MS Paint.

I may make fun of the guy, but I will admit that I have on occasion done some ‘MSPainting’ of my own. This is my best work.

MMOG – massively multiplayer online games

MMOG‘s are becoming increasingly popular and although I have never played one, I find them extremely interesting.

An MMOG is a game that is always running and can be joined by hundreds (or often thousand) of players at once. The developers create a persistent online world which players can enter. When you subscribe to one of these games you get an online character (an avatar) which represents you in the online world. A lot of people spend a lot of time (and money) developing these avatars – check this one out.

Then any time you want to play, you can move around in the online world, interact with thousands of other players (all represented by real people) and try to achieve whatever the goals of that game are. For instance in World War II Online there are constantly updated front lines as thousands of players do battle in a virtual Europe.

I think this is extremely cool, because whole worlds populated by (mostly) real people exist on the internet. Whole economies (often linked to the real economy) and societies develop. For instance Second Life

“has its own economy and a currency referred to as Linden Dollars (L$). Though the exchange rate fluctuates, as of February 2007 it is reasonably stable at around L$ 270 to one US dollar.”

These companies make a lot of money too. World of Warcraft has more than 8 million subscribers which at $15 a month turns into monthly revenue of $120 million!

There is just so much to say about all this – but not here (I want to go home!).

Here is a link to a NY Times photo collection of real people and their online avatars. Some interesting combos.

Early history of Photoshop

Photoshop is the image editing software available. Over 3 million copies have been sold, and it’s expensive so I can only imagine how many pirated copies are installed.

This is a short history of the origins of Photoshop.

Summary:

  • The software was developed in the 80’s by John Knoll (with the help of his brother Thomas).
  • The earliest version had no user interface – you had to type in commands.
  • Early versions were completely in black and white.
  • John couldn’t find anyone who wanted to sell Photoshop. Eventually a company selling scanners licensed it.
  • Things only really took off when Adobe got hold of the software and released it in 1990

Today is D-Day

Today (6 June) in 1944 the biggest amphibious invasion in history began when the Allies landed on the coast of Normandy in France. An incredible feat, and a battle which lasted over a month ensued. Although the Nazis fought hard, by the evening of June 6 things weren’t looking too good for them. Especially since Adolf had already started to go completely nutty in his military strategies.

I know it’s geeky but I dig D-Day.

Google Street View – awesome and get over the privacy

You may know that Google offers quite a cool map service. It has satellite imagery of most of the earth, as well as good road maps, etc. Pretty cool to check out a satellite image of your house. For instance this is the building that I am currently sitting in:

Recently they added a really cool feature called Street Views. They got some cars with about 10 cameras mounted on the roof and cruised around some big american cities. Now when you are in Google Maps you can get a look at what you would see if you were on the ground (only in those cities though).

This is pretty freaky because now you can see individual people. For instance one woman found her flat and could see her cat looking out of the window! I think it’s awesome and I wish that we had it in Cape Town. People see you walking around all the time – now there is a permanent record. It’s not the end of the world – get over it.

Here is a site dedicated to interesting sightings in Street Views. My favorite so far is this one which captures a small car crash in progress:

Amazingly high resolution photos

Check out this link to a 720 megapixel photo of Sydney. Your normal camera probably takes pics at about 5 megapixels, so this is some serious resolution. His blog says that he creates these things by stitching together hundreds of individual photos. He must have a mean zoom, a good tripod and some real patience to get it right.

This is a screenshot of part of the zoomed out image.

And this is a zoom in on the bottom left of that screenshot.

He also has links to other photo’s, one at 1500 megapixels which is well worth a look.

Remember to check out my shared articles

I read a lot of news and articles using the brilliant product Google Reader. Reader collects and allows you to view RSS feeds from millions of sites. So each morning I log onto Google Reader and scan through all of the new articles for the day.

One of the cool features of Google Reader is that you can choose to “share” articles that you find interesting. So whenever I see an interesting article that I’m not gonna explicitly blog about -I just click share.

There is a link to my shared articles page on the right (under the heading Blogroll). Check it out from time to time.