Category: Science

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Constant speed or constant throttle?

So, which of these types of driver are you? Now, I’m not claiming to be a good driver, I’m too human to think I’m any good, I wouldn’t even claim I’m a good Gran Turismo driver! But I do know that these two types exist and I’m definitely one of them. This is probably a continuum so I’m not claiming a complete dichotomy.
Type A – Constant Speed
This type of driver maintains a constant speed along a motorway by varying the throttle as gradients increase or decrease. For instance, earlier today while travelling along the M20 I maintained a healthy and legal 70mph. I did this by increasing the throttle uphill and decreasing it downhill. Simple really.
Type B – Constant Throttle
This type of annoying driver maintains the same pressure on the throttle independent of the gradient of the road. This means that as the vehicle goes uphill it slows and then speeds up again as the gradient levels or goes downhill. Many times I have overtaken a car uphill only to be overtaken again going downhill. This is clearly wrong. How do I know this is wrong? Because cars have speed cruise control and not a throttle control.
This type of driving being wrong does not apply to big trucks but definitely to vans who like to go as fast as possible but slowing uphill because they are heavy, thereby blocking the outside lane.
Learn how to adjust your right foot, morons!

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Flat or heaped? A spoonful of sugar

My dad always asks for two heaped sugars in his coffee. Is it worth it? How does it compare to a level spoon of sugar?

Initial tests:

Standard Teaspoon – mass of granulated sugar (nearest gram)
Level 5g
Heaped 7g

Medicine Spoon – mass of granulated sugar (nearest gram)
Level 6g
Heaped 9g

It looks as though heaping sugar on top of the spoon increases the sugar by a factor of 1.5 (or thereabouts). I now need to get into the science department at work to use a more accurate set of scales.

Is it worth asking for heaped spoonfuls of sugar. Yeah, go for it!

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PS3

This is probably the definition of irony.
Decided to cancel my Continuous Play PS3 insurance policy. Although it was only £5 a month I had been paying it for a few years and could have bought another PS3 with that amount of money in that time. The issue is that I have a 60Gb Fat PS3 and the specification is so good I don’t want to lose it. I bought a few SACDs when they were released and the PS3 is the only thing that will play them since I upgraded my amplifier. So, 11am I phoned the insurance company and cancelled my policy with them.
I started playing on the PS3 and actually had it doing some GT5 B-Spec races while I was watching TV. Later on while my baby son was sleeping I thought I would have a go at a Japanese GT race at the Nurburgring  Grand Prix circuit. I was doing really well and catching first place at about 3 seconds a lap with 2 laps to go and a gap of 4 seconds. This was going to be a fun last lap.
BLANK. The TV picture died, I could hear the HDD and fan of the PS3 running down and playing the sounds of death. Suddenly there’s a red light flashing on the PS3. I google, as is the modern way, and it turns out to be bad.  OK, no panic. Surely everything will be ok.
Phoned the insurance company: Yes, my cover is still valid and yes they will stop my cancellation order.
Phoned PlayStation support: Yes, you are covered and we’ll send a reconditioned unit to you tomorrow.
Result: I am now playing GT5 (managed to get the save file) and loving it still. Won the GT race and now, as I type the PS3 is racing a B-Spec race for me but rather badly.
Hopefully, that is the end of the story.

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Start of a solar farm

Here are the foundations of a solar farm. I guess it has received planning permission as the last I knew it was just a proposal. Clever work though as the panels are bolted to the concrete sections that were part of a packing site.
If I remember I’ll link to the company doing this. Just imagine that Eccles and Aylesford might be leading the way in green tech.

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More work

Been spending some time trying to lower load times for the site and seeing if I can customise the look. All of this takes a lot of time, which I am willing to give. It is not difficult though. I have to say I have found that WordPress is pretty good. I google things when I am not sure and the answer is pretty much there. Editing php files and the such is quite enjoyable even though I have no idea what I am doing.
One thing though, people. I am using the Twenty10 theme and not another because I like it and not because it is the default theme. I have tried other themes and I don’t like them. Maybe I’ll create my own theme.

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The Radar Fallacy

So, I mentioned The Octonauts in a previous post and I still think it is brilliant however there is another scientific flaw I have noticed. The Octopod’s Radar system seems to have the tv / film fallacy (it’s not a real fallacy, I made it up).
When a radar turns it discovers the position, as a distance and direction, from the radar. There are many types but they all work roughly the same. For a radar system to update the position of an object it must turn through the space where that object is. The radar sweep line on the Octonauts display turns at about 30 rpm meaning that the position of the decorator crab would jump every 2 seconds as it gets scanned. However, the position of the crab as marked by the blip on the screen moves smoothly even while the radar sweep is well away from the crab. This could, of course, be because of an auxiliary system that is not mentioned in the show.
I am sure there are films and tv shows where the radar has a finite refresh time but the movement of planes are smooth. Time to start looking at radar shots more closely!

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Mathematics – the path to understanding

Science is about observing our world, making predictions and then seeing if we are correct. What a wonderful and beautiful method for understanding our world. Much preferable than relying on an ancient book and a mystical bearded man in the sky.
Mathematics is the key to science. Understanding mathematics gives you the tools to probe scientific models and to make predictions. It’s also how we know what we know and allows us to decide what works. Bit by bit our models of the natural world change and improve and feed on the evidence presented by our research.
Be good at mathematics, or at least be hard working. It can be rote learnt but it’s much better to have the flair and natural ability. This system is rather hard on those who can’t follow the maths, but there are plenty of people willing to popularise science in TV shows and books. There’s just not an excuse for trying, or trying to find out.

I advise my students to listen carefully the moment they decide to take no more mathematics courses. They might be able to hear the sound of closing doors.
James Caballero

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