HN user
Currently doing a PhD in computational materials design at University College London.
https://utf.github.io
I use gmail: alexganose
This is a great paper.
As a counterpoint, one place where determinants are incredibly useful is in Hartree-Fock theory, where they effective encode the Pauli exclusion principle (or anti-symmetry requirements) of atomic orbitals.
We really don't have a shortage of space to put solar panels. The challenge is making solar panels that are cost effective (e.g. $ per Watt).
In response to your edit: That is a possibility, that yes they may find a niche in the fancy of the rich.
But the point I'm making is that the article is hyperbolic and misleading.
Transparent solar is not the future of utility scale power generation. It is not going to solve any of the problems currently holding back solar power from becoming ubiquitous.
We are already struggling to make low cost solar panels that have a high efficiency using light absorbed from the visible spectrum (which accounts for most of the sun's spectral irradiation [1]).
Furthermore, you can't just have solar cells that absorb a wide range of the solar spectrum, there is an optimum band gap for these materials of around 1.34 eV [2].
This means that the most popular solar cells in development, namely CIGS and CdTe are already occupying the niche for maximum efficiency. The challenge now is finding new materials that are cheaper to make and show greater efficiencies whilst not relying on the use of rare earth/toxic elements.
(Hint: the real development in this area at the moment is hybrid perovskites [3])
Basically, this is irrelevant cruft.
[1] http://zebu.uoregon.edu/~imamura/122/images/solar_spectrum.p...
[2] http://en.wikipedia.org/wiki/Shockley%E2%80%93Queisser_limit
[3] http://www.nrel.gov/ncpv/images/efficiency_chart.jpg
(source: currently doing a PhD in a new photovoltaic materials)
He delivered the BBC Reith Lectures this year too, which were fantastic.
Gay marriage has this week been legalised in the UK. I'm really not sure what else they can do.
> So a person who lays the iPad2 on their chest while napping, or holds one on their chest while reading, could trigger magnet mode.
I think the point the article is trying to make is that holding an iPad close to your chest is both more likely to happen, and less noticeable than holding a magnet to your chest.
Why would you suggest to ignore me when I was aiming to promote discussion. I was primarily questioning the science behind the post as there's a lot of questionable reporting on topics like these and so if it looks dubious, then I'm set to promote clarification. As it turns out oliyoung does seem to know what he's talking about, so I guess I needn't have worried.
And the snark at the bottom of your reply is really quite unnecessary.
OK. I understand what you were trying to put across. But ultimately what you described was a set of symptoms of a disorder that you didn't fully explain, so I found it confusing reading the essay with vague hints of the underlying issue.
I'm just saying this as cognitive scientists spend a lot of effort working out which mechanisms and pathways are malfunctioning for a specific disorder, and a generalised statement listing 3 neurotransmitters didn't sit well with me.
From a neuroscience perspective, there is a major issue with self diagnosis, its very hard to be objective when you're examining yourself and once you begin to notice something, you tend to 'fix' the evidence in your mind. Psychosomatic symptoms are surprisingly common. However I don't want to sound like I'm questioning your diagnosis, so if you are aware of a deficit on a functional level please ignore me.
I'm really not sure what this means:
> My brain works a little differently than most people’s. My body doesn't balance chemicals like serotonin, norepinephrine and dopamine well and as a result I get “sick”, my label for my particular mix of anxiety, depression and general mental health issues.
Chemicals like serotonin, norepinephrine and dopamine? So neurotransmitters? And what does balance have to do with it? Do you lack dopaminergic neurons? Do you have an over expression of serotonin? I'm not asking for you to go into detail about your problems but that sounds a little too wishy washy.
A lot of these issues sound exactly like what many other people also suffer from every day. So it's hard to not think that on some level this is psychosomatic.
It still doesn't tell you who it is on the about page though, just that he's on the AppKit team.
Hey so did I!
My first programming experience was working on RS2DBase. It was pretty popular back in the day. I met loads of great people through those forums and I don't think I'd have gotten into programming without them.
I've done the same thing, I've customised holmans dotfiles and just replaced the content with my preferences. I really like the rake mechanism for symlinking. Simple and convenient.
Well Lisp is dynamically typed and Javascript, Ruby and Python seem to be doing pretty well.
Only one submission on the page you linked to was actually a comparable tool tip.
What? Edge detection is pretty much the only use for the Sobel operator.
I guess this is a good a time as any to show the organic chemistry notes that I've been writing up.
https://github.com/alexganose/chem1201
So far I've done my first year notes. They aren't particularly organised, they are literally just latex versions of my handwritten notes so they won't be good to learn from, however as a summary they are quite useful.
I'm doing it for purely selfish means as I can revise from these notes better, but I thought it would be good to open source them so people can use them if they want.
Theres an analysis of his deconstruction here:
http://functional-orbitz.blogspot.se/2013/01/deconstructing-...
When I signed up around a year ago it wasn't a discount. It was a free micro account that lasts two years. I'm not sure if that's changed however.
They do offer a free plan for students. I get 5 free private repos.
I can't get the link now since GitHub is down ha, but when it's back up, just have a quick google and you'll find a quick form to fill in and voila. It's great.
A little bit more info here:
AFAIK if you double tap the home button whilst the phone is locked and then press play, it will then resume the music.
The feature they removed was the audio auto playing when you lock the phone.
EDIT: Just tested and you can indeed play music on the lock screen.
And it still doesn't do the one thing that I wanted it to. Namely, letting me play the video whilst the phone is locked. It's extremely silly really, that if I wanted to listen to a playlist of music, I have to keep the phone unlocked the entire time.
In the meanwhile, I'm going to continue using Jasmine. Its what the youtube app should be.
I think this is great, its always a sign that a community is growing well when it has dedicated conferences with such great speakers. Congrats guys, I'm looking forward to seeing where this takes off to!
> And indeed it is pretty impressive how fast the rendering happens given that the code operates at such lower level.
Sorry if this is a stupid question, but wouldn't you normally expect low level code, whilst more time consuming to write, be faster or just as fast as higher level code.
For example, how C is used as a standard for fast code since it's so low level.
Correct me if I'm wrong but does this procedurally generate the textures for each block. I can't see any code for loading assets and the init function, has some quite complicated color code. If so that is awesome!
I missed the original post about this competition and so now the deadline has been extended, I thought I would share it.
Looks like there are some really fun projects!
I realise that incitement is illegal in the UK, but it is America that is pushing for the extradition. I would also argue that a website is in full view of the public (especially with the amount of sharing that occurs).
But like I said in my original response, it doesn't matter whether or not it is copyright infringement or theft, as in the analogy we are discussing the actions of TV Shack not the actual hosting of the material.
What I mean is, this isn't a discussion about whether copyright infringement is illegal, but instead whether linking is illegal, and I think the two crimes presented are comparable enough (although definitely not the same), for the difference to be easily overlooked for the sake of getting across a message.
Yeah I completely understand this point of view and I was toying with removing the reference to search engines, but ultimately it boils down to the same thing in all cases, as mentioned in the article:
> US authorities claimed the 24-year-old's TVShack website hosted links to pirated films and TV programmes.
Regardless of the inherent properties of search engines, they are still linking to that content (or to content that links to the content).
I do understand the point of view of the Law, but I think ultimately it can't and shouldn't be enforced.
I'm sorry, I don't understand, how would telling someone that the staff have left the store be breaking the law. And why do you think its a poor analogy. Its a sign post directing people to a place where they could easily access content illegally. Very similar to what TV Shack was doing.
The analogy only fails in the sense that in reality the item stolen was digital media (it could be argued that nothing of value is lost) and in the shop scenario, the content is physical media (and therefore value is directly lost). Despite the difference though, thats irrelevant to the action played by TV Shack (and the sign in the analogy).