Last login: 16 hours agoLuthercymru
luthercymru is a 30 year old guy from Swansea, Wales, UK.
Likes 1,539 pages, 4 videos, 9 photos • 9 fans
Member since Aug 15, 2005
I'm a father of one, a computer programmer and graphic artist from Wales.

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BBC NEWS | Education | Mathematicians set Chinese test
Liked it Apr 25, 2007 12:52pm 3 reviews uk
http://news.bbc.co.uk/2/hi/education/6589301.stm
As is often in these questions, the image isn't a very accurate representation. If I'm correct, then the prism looks a bit like a kite, and is symmetrical along the plane A1AC, which pretty much proves i.

The answer to ii.) is the dot product of the normals of planes A1DB and DC1B (get the normals by taking the cross product of two normalized vectors in those planes, making sure you get the signs right). For question iii.), the answer is acos(dot(AD,(B-A)(c1-A)) or something like that.

Maybe I'm wrong, maybe not. There is no way I could have done this in my first year of secondary school and I've only got a clue how to do it as my job is programming graphics for 3D games -that's one thing the maths you learn in school (or don't learn, as the case may be; I learned all this stuff off my own back) is good for kids!


Ah, just re-read the page, this is for university entrance. Well, that's different. Whilst I'm not too hot at written exams, I would probably have fathomed out the method by age 16, having written a 3D modelling program by that age. Fear not blighty, some of us are edumacating ourselves!
Daffodils - Check it! - MC Nuts raps Wordsworth poem for todays youth - on Bore …
Liked it Apr 17, 2007 3:49pm 1 review humor, bizarre, red, litterature, giant
http://www.boreme.com/boreme/funny-2007/mc-nuts-wordsworth-p1.php
The title says it all. Word.
The official clayworks homepage
Liked it Mar 21, 2007 5:12pm 1 review computer-graphics
http://www.clayworks3d.co.uk/
Home page for the 3D modelling program Clayworks
Well, Well, Well–If It Isn&039;t A Family-Owned Retailer | The Onion - America…
Liked it Apr 11, 2006 1:32pm 1 review activism, ecommerce
http://www.theonion.com/content/node/33666
The Onion's take on the Wal*Mart behemoth.
Jona Warbey
Liked it Mar 20, 2006 10:24am 1 review recylcing, woodwork
http://www.jonawarbey.com/
Beautiful woodwork from recycled wood
ArchitectureWeek - the new magazine of design and building
Liked it Dec 17, 2005 1:54am 1 review cad, 3d-graphics
http://www.architectureweek.com/cgi-bin/dlk?http://www.drsoftware-home.com
Real-time structural modeling software.
ABOUT THE MOVEMENT
Liked it Dec 15, 2005 2:25am 77 reviews activism
http://www.vhemt.org/aboutvhemt.htm
Herein lies the quintessential dichotomy: those of us intelligent to realize that by producing offspring at anything more than replacement levels will result in exponential growth and eventual disaster for the whole planet are those who will pass fewer of our genes or teachings onto a new generation.


This sort of restraint is highly noble and is a prime example of rationality conquering base reproductive urges. However, this also leaves those who have no such restraint (and who seem to regard those who have any concern for our environment to be somewhat unhinged) to breed and consume with impunity, until the inevitable crash occurs and they all die in a miserable cesspool of a planet, huddling for warmth around the last burning embers of their useless 1,000,000 dollar bills.


So, the progressive segment of society will decide not to breed and will therefore remove from the human gene pool any kind of redeeming features. This is a simplified view and doesn't take into account the importance of nurture as well as nature. However, that point is moot as the same people who parent children also do much to shape the world view of those children.


It is ironic that those intelligent enough to understand the effects of evolution and exponential growth are those who will voluntarily leave the way open for the fools who don't.
Make A Better Place
Liked it Dec 13, 2005 3:39am 1 review activism
http://www.makeabetterplace.org/
Nice people doing little things where it counts.
Deep North Gothic
Liked it Dec 3, 2005 8:04am 1 review mythology
http://www.uri.edu/artsci/english/clf/n5_a1.html
myths of northern Japan.
Our Widespread Faith In Recycling Is Misplaced
Disliked it Nov 29, 2005 2:25am 1 review conservitism
http://www.cato.org/dailys/8-27-97.html
It shocks me that someone can have the mental agility to write an article spanning several paragraphs and yet fill it will dangerous and misleading half truths.


The author makes the common assumption favoured by most modern capitalists: that only the internal costs, the bottom line, matter. This is a fallacy. Landfills and not simply places where we dump our carelessly generated waste, they are toxic time-bombs that degrade our environment and will continue to do so for generations to come. Our grandchildren will curse
us for our idiotic indulgence.


Recycling does take energy and care must be taken to do things as locally as possible: shipping goods half-way across the world in order for them to be pulled apart in regions that have cheaper labour or more lax environmental laws is just plain wrong and, in terms of true cost (i.e. factoring in those 'externalities' so often conveniently ignored by business), very inefficient.


So, does recycling paper use more water than growing a making fresh paper? That's quite a difficult one to calculate and although I've found sources that claim that recycling uses less water, I cannot verify their veracity so will not include them in my critique of this article.
Note that the article itself presents unverified statements as fact.


The amount of bleaching, washing and dying of recycled paper depends of its final use. These processes are also needed with paper derived from fresh growth. I also doubt the article takes into account the amount of water needed to grow a tree to maturity in the first place.


The article also suggests that the fact that there is work to be done in recycling is a bad thing. Hang on a minute, isn't work (particularly unskilled, minimum wage work) the fundamental basis of the Laizes-Fare free market capitalist system so beloved of right wing think tanks like the Cato institute? I'm sorry, maybe I've missed something but it's been my experience that industrialists just love activities from which they can make money by using the labour of underpaid voiceless masses who can be easily replaced with machinery or even cheaper labour. Now, it's my opinion that all workers deserve far more protection from the ravages of unethical corporations but I certainly don't believe that useful work is a bad thing.
The author should worry more about the huge numbers of workers higher up the societal food chain who perform truly useless (or even detrimental) work for far greater financial reward. The people who spend all day shuffling pieces of paper around for no good reason. The people who print off every email. The people who create all the waste in the first place.


The simple fact is that people in overdeveloped nations waste huge amounts unnecessarily. Environmentalists have a simple mantra: 'reduce, reuse, recycle'. The idea is that you do it in that order. The idea of reduction
is an anathema to industrialists as successful implementation would mean that their economy wouldn't grow. Perpetual growth is like perpetual motion: it only exists in the minds of deluded fools. Entropy is real and the economy feeds off the natural resources of the world and the labour of its people and animals. When these things run out or become degraded,
the economy will crash. It would be better to find a more sustainable steady state where we waste far less. This is a great deal simpler than many people think. The best way to reduce dependence on packaging and wasted transport is to buy locally produced food.
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