Category: Sci/Tech

Day 3 of making the ladder (by )

Well, after two days of prior work on the ladder, yesterday I settled down to another day.

I started by welding together the second side of the ladder, to match the first. With that done, I now had the two sides of the ladder, ready to join them together with the rungs:

Both sides are now complete

With that done, I carefully aligned everything on the welding bench and ground the welds on the inward sides down so that the rungs could fit on nicely:

Ready to start welding the rungs in

I set the rungs back half a centimetre where they were attached at the same point as a spacer, so they were welded both to the uprights and to the spacers, as I felt this would be stronger. The pieces of wood you can see under the rungs are maintaining that spacing.

Now, as I mentioned before, I'm not very good at welding; I can make things structurally sound, but not pretty, because my welds often go wrong and I have to go over them again. This usually leads to big, messy, welds, and on a couple of occasions with this job, I actually melted a hole in the metal and had to patch it up. Here's one particularly terrible weld:

Bad weld

I ground the lumps around the edge of the hole down:

Bad weld ground out

Then welded a metal plate over it:

Bad weld bodged

This, in contrast, is I think the neatest weld I've ever made:

A good weld

With all that done, the ladder was actually a ladder:

It's actually a ladder now

I sanded it down to get the weld gunk off, then washed it thoroughly in white spirit to remove the grease the metal came covered in, and laid it out in the kitchen to paint:

Sanded, cleaned and ready for painting

Then I gave it a priming coat and left it to dry overnight (I did it in the kitchen so it would be warm and dry overnight, rather than the cold and damp of the workshop):

Priming coat applied

It'll need another couple of coats of paint, and I need to cap the open ends of the uprights at the top, then I can mount it on the wall.

Part of welding that I always find quite profound is the way that a bunch of bits of metal, initially held together with clamps, and gingerly handled in case it comes undone, slowly transforms into a structure made of solid steel. This was driven home with the ladder project when, finishing the welds on the rungs, I found the best way was to lay it on its back like in the last photos and sit on it so the welds were flat (the best orientation, as molten metal likes to run away when the weld is vertical) and comfortable to reach; it didn't even flex!

I can't wait to be using it to get up on the roof. There's a flap of plastic sheeting lifting up in the wind and letting rain in, and I can't reach it in any other way...

Continue to day 4...

The Danger of Quotas (by )

Recently a Ruby on Rails conference was destroyed and never took place because feminists complained there were no women on the panels and talks etc... when it was pointed out that no women applied the response was that they had not tried hard enough to find women. This attack grew until the sponsors pulled their money.

This is a shame and horrible, a lot of work had gone into the event and I'm sorry but it is not the organisers fault no women applied. They should not be forced to look for women for fear of events not going ahead. Now what should have happened is that the event went a head and effort was then put in to encourage female programmers to apply to the next one.

Even if women had applied but were not as good as other candidates, there should not be an obligation to take them on just to fill the quota.

Now obviously there is the issue that some people for some reason still seem to think women are not as capable with things such as science and maths and programming but really forcing them to put women on panels is not going to help. The quota thing is being banded about in the science world but to me this can be nothing but damaging to the image of females in science and tech.

The reason is that it devalues what they do - ok so they are there because they are actually really good at what they do - but no one is going to be thinking that - they will be thinking oh she's the token woman isn't she? I wonder if she actually knows her stuff.

Now I had issues with this during my degree. I found out about the area I really wanted to study due to an outreach programme for getting women into the sciences and this was good. In conversations I've had since with various people in charge of universities they agree that the intake of girls on the courses suddenly increased to around 50% and that this was streadily trickling upwards through the science hierachies. There was some winnowing away with the issue of women hitting the glass ceiling with finding themselves at home with kids if they went for families in their 20's, they would often then find themselves also look after sick relatives or some such making a return harder but this was being metered out by older women joining the ranks once family were off hand.

This was great and I never experienced any problems with sexism from staff or established scientists (though disability was another thing and I believe a friend who found herself pregnant had one person say she wasn't coming back so why make a fuss - she got her degree and that staff member was horrible in many other ways). I agree that evidence of women succeeding is needed but it does not need to be rammed down peoples throats. The issue is that we are heading towards equality right?

Not female supremacy.

My main beef with quotas is that though I did not receive any sexism from the lecturers or those I worked with during my work experience I did from fellow students. And the main thing they bullied me over (and yes I mean that in all it's nastiness) is that I ticked three boxes, I filled three quotas with just one person so of course I got in. I was a disabled, poor, female, the only way I could have been better for the books is by being a minority preferable not the creamy pale white I am.

And the thing is there is no come back to this - how did I know that wasn't why I was on the course?

I already knew that I'd been offered a lower grade boundary to get in than others had - a correction made as those in 'normal' schools tend to score lower grades than those in schools you pay for but tend to actually work their buts off if they manage to get in. As it turned out I got the grades needed to get in without the concession which was a great help with the confidence when arguing my right to be there.

The most important thing for succeeding is self confidence but how can you have this if you yourself are worried that you are only there because of some damn quota. A female lecturer told me this was why women had to be better than men to get to the higher jobs in the modern science world, no longer is it to get noticed but more to keep the wolves away once you are there.

To me it is saddening to see that people are still worrying about this, and I have seen 'feminists' do and say some awful things. Things that make me not want to say 'I am a feminist' - when I say it I mean that women are equal to men. When they say it they mean women are better than men and men are all horrible and must pay for centuries of persecution against women.

Well you know if that's the case then they need to look at who's ancestors persecuted who's and start worrying.

People are people.

Scientists are people that do science - end of.

The Writing of Serious Stuff (by )

I has been wanting to write about news events and serious things for a while but I am finding it hard, I used to write what ever I wanted and pop it on here but I become increasingly worried about offending people etc... It is really lame and very sad so I want to get back to writing what I feel needs to be written rather than worrying about what people want.

Part of the issue is that I have been told I sabotarge myself - by bringing up political stuff etc... but really I can't just ignore stuff. Sometimes I have not had the energy to tackle a subject, not had the time to research it as much as it needs to be etc... Part of the issue is that I am also bored of having/listening to the same arguments again and again. It's like philosophy - it got old at university and everyone just moves in circles and it drives me nuts!

Anyway I want to get back to writing my little ranty essays even though it means I will probably be going in an ever decreasing circle and be called Ozzel Um.

Having said that - there is now a Snobberlink Category on Wiggly Pets full of daft comics 🙂

Horse Meat and Food Standards (by )

Ok so everyone has been going on about the horse meat in the beef burgers and there have basically been too reactions 1) Oh my god! and 2) hahahahaha.

The first one tends to be along the lines of 'oh no I ate poor horseys!' which for people who eat meat is a bit silly. As has been pointed out they are moaning about the wrong animal being minced up for food. Is a horse really more valuable than a cow?

It could be argued that the horse is more intelligent but the people arguing this will nearly always be bacon eaters too and pigs are really intelligent. The other thing is that this seems horrific to the English but the rest of Europe eat horse! All the time not just when there is a cock up.

People need to assess what they are actually eating rather than burying their heads in the sand. I have friends who don't like the idea of the animals being killed but will not give up meat - they just buy bits that don't look like animal and try not to think about it. Maybe if they thought about it a bit more things like this wouldn't slip in under the radar.

This is interesting as Alaric doesn't even eat fake meat as the idea is alien to him. And this brings me to the point that though I think the reaction is silly, there is still the matter that people where choosing to by minced cow and not minced horse and the choice should be there. Not just for ethical reasons either - now I am not a vegitarian but have issues with cow fat. They make me sick weather in milk or the meat so for me a mistake like this could have serious health consequences. Say I was buying lamb burgers and they happened to contain cow - I would be getting sick and not know why. This is a safety issue.

Also if they have managed to put the wrong meat in there what else has accidently slipped in?

This mess is also going to result in a hell of a lot of food wastage at a time when people are queueing at soup kitchens and food banks are struggling to supply what is needed for all the families in crisis and that makes me want to cry or throttle someone. I know it would seem like a solution to give the patties to them but that would only work if they could be guarenteed safe otherwise you might be making a bad situation worse.

Lets hope it ends up in the bacteria vats for gas and electricity production than in landfill.

Day 2 of making the ladder (by )

Yesterday, I cut out all the bits required to make myself a ladder.

This morning, I set out on foot to visit Machine Mart and Screwfix for some supplies; a set of magnetic welding clamps, some white metal paint for the completed ladder, and these anchor bolts to attach it to the wall. As you can see from the diagram on the box, they just can't wait to be buried in a wall:

Happy anchor bolts

Anyway, it's been a long time since I last did any welding (and I've never been great at it), so I started by just tacking a few bits together to check they line up correctly with the wall. I started with the trickiest bit, the angled spacer:

Tack weld

Then I proceeded to drill correctly-sized holes for my anchor bolts into the mounting flanges, using my column drill (a very useful tool). This made a lot of pretty swarf:

Drilling the mounting flanges

Then I started welding the flanges onto the spacers. The new magnetic welding clamps (the red thing in this picture) came in handy here; their function is to accurately hold things at ninety (or forty-five) degree angles:

Welding the flanges onto the spacers

With all six of the spacers flanged, I could start tack-welding them into place:

Welding the spacers onto the upright

My welds on the flat were OK, but my welds inside corners are still pretty ropy; I had to keep chipping the slag off and going over again to fill in gaps. Another problem was that the steel square tubing has rounded corners, meaning that when a spacer has to be welded onto the upright to make a T, two sides of the end of the spacer are to be welded to the curved corner of the upright, making a big gap I had to bridge across somehow. It turns out that surface tension causes the exposed edge of the metal to pull back when it melts, so I had to bodge little slivers of metal left over from the cutting into the gap to stop this happening, resulting in some ugly welds that I may have to grind flat before I paint it - or to make the surfaces I'm going to weld the rungs onto flat enough for them to go on straight! We'll see.

Anyway, having checked the fit against the wall, I could then finish off the welds on all four sides of each junction, completing one side of the ladder. It's intentional that the flanges point in different directions, by the way - they mainly point upwards so the weight of the ladder isn't pulling them away from the wall, except that the one on the angled spacer has to be underneath so I can get in to fit the bolt, and the top one is underneath so the anchor bolt hole isn't too near the top of the wall:

One side of the ladder

At that point I ran out of time. It won't take me too long to assemble the second side as I already have all the flanges welded onto the spacers (which was quite time-consuming), and I can clamp it all onto the existing side to get the alignment correct without all the cross-checking and measuring I had to do the first time.

After that, I'll need to weld the rungs in place, tidy up the welds, scrub it down with a wire brush and sandpaper to clean off all the welding grime, degrease it with white spirit, and paint it.

Then I need to figure out how I'm going to get it into the wall! I'll need to somehow hold it in place while I mark out the drill holes, which might be tricky without an assistant. Then I have to try to drill the holes where the marks actually are (the bane of my life is carefully marking out a wall, starting to drill, and the bit hitting a stone and suddenly meandering half a centimetre off centre - then having to try and jam a screw in nonetheless, as whatever I'm screwing to the wall has holes in places that can't move to match).

After that, holding it up to the wall and slipping in the anchor bolts should be easy - then tighten them up and I'm done! They have a tightening torque recommendation on the box, so I'll finally get to use my torque wrench, and not be left wondering if I've tightened them enough or risking cracking the wall by over-tightening (which has been a concern with previous anchor bolt expiditions).

Continue to day 3...

WordPress Themes

Creative Commons Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales
Creative Commons Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales