HNHacker News
TopNewBestAskShowJobs

iwr

827 karma · joined October 18, 2010

submissionscomments
iwr··on A new end-the-world scenario: Photosynthetic Mirror Cells
If this comes to fruition, we can at least console ourselves that Global Warming would be stopped (by killing out ocean-borne oxygen breathers).
iwr··on A new end-the-world scenario: Photosynthetic Mirror Cells
They wouldn't have an inherently higher survivorship, but it would be toxic to predators, wiping them out (either directly by toxicity, or indirectly by starvation), at the same time as growing and spreading further. Natural evolution itself is unlikely to develop an organism capable of metabolizing mirror sugars, fats, proteins.

So this means people have to take an active role in eradicating this life form, if it ever comes to be.

iwr··on A new end-the-world scenario: Photosynthetic Mirror Cells
Recently it was proven possible to construct an organism through synthetic processes. This is still limited to very close copies of the real things, but could be adapted to produce reverse chiral molecules.

http://www.jcvi.org/cms/press/press-releases/full-text/artic...

Edit: Although, the added difficulty would be the need to reconstruct a cell completely out of mirror molecules for it to work. In the case above, the genome was injected into an existing cell and left to replicate. So it's not quite a trivial thing to do.

iwr··on A new end-the-world scenario: Photosynthetic Mirror Cells
Even if predators can't metabolize the mirror molecules, they can still eat them (possibly dying afterwards). So you'd need to release the mirror algae( ?) in very large quantities for them to overcome the predatory pressures in their environment.

It also means that by killing predators (zoo-plankton), mirror algae are creating a niche for standard algae too. So you could end up with a soup of R and L life, but diminished predatory activity.

iwr··on Ask HN: How do international web apps handle payment through Paypal?
You may want to have a payment processor as a backup solution, they will provide their own APIs to their services. Relying on PayPal alone can be risky.
iwr··on A new end-the-world scenario: Photosynthetic Mirror Cells
Relevant resource on the topic: http://en.wikipedia.org/wiki/Chirality_(chemistry)
iwr··on What's the rationale for null terminated strings?
The question should be: "Why doesn't C have a string data type?" C only considers a pointer to a char, it's the programmers' fault they treat this structure like a string.
iwr··on The 25 Most Notable Quotes in Tech History
Why do people think a social networking toolbar, social networking side panel and facebook iframe add value to their website?
iwr··on SpaceX's top secret payload
All they missed was a can of spam.
iwr··on PARC Readies Printed Electronics for Market
One more step toward a fully self-replicating reprap.
iwr··on Economia
It's yet another "command economy simulator", probably not very different from the models used by our central bankers. That is, if they indeed rely on models and not nakedly trying to enrich or prop up the big banks.

There is nothing special about credit and money, they are goods and services that arise naturally from market interactions. Having central banks "in charge of the free markets" is self-contradictory.

Another specimen: http://nobelprize.org/educational/economics/trade/index.html

iwr··on Navy’s Mach 8 Railgun Obliterates Record (w/ video)
For a fraction of the cost of an electric gun, they could have built a light-gas gun with better capabilities.
iwr··on European Carriers Want Google, Facebook to Contribute to Mobile Data Costs
You mean, the first time I had a reason to use (the expensive) mobile bandwidth, the carriers are unhappy?
iwr··on Julian Assange’s Honey Trap: That’s Rape in Sweden
Can we get some perspective from a Swede on this issue?
iwr··on The computer programming language known as "open source code"
In which case, they could have been in violation if it was GPL code.
iwr··on The computer programming language known as "open source code"
Why would this guy bother copying stuff off the Goldman servers when it was open source, and presumably freely available?
iwr··on Ask HN: Want to help build PairRoulette, ChatRoulette for pair programming?
Prepare for obfuscated-code penises.
iwr··on Oracle Asks Apache to Reconsider Java Committee Departure
It's more a courtesy call so they don't look quite like saying "Good riddance!"
iwr··on Why Most Hardware Specs Are Total Bullshit
Really, what's with those RGB+Yellow displays?
iwr··on Elegant New Theory Explains Origin Of Asteroid Belt
While retrograde, it's only "weakly" so in that it has a very slow rotation period (1 solar year == 2 solar days).
iwr··on Complete Map of Optimal Tic-Tac-Toe Moves
For a challenge, play Gomoku (large Go board, 5 in a row, column or across)

http://www.playok.com/en/gomoku/

iwr··on Elegant New Theory Explains Origin Of Asteroid Belt
So planets would tend to form more from the aggregation of gas rather than rocks or dust (then accumulate the other kinds of matter in the new gaseous body). Does this new model also propose that planets formed further out than previously believed? ("in excess of 50au" means further out than Pluto)
iwr··on Generating Matter and Antimatter from Nothing
Pair production is not a new phenomenon, it's been known since Einstein. This is the fundamental way particle colliders work.
iwr··on Military Bans Disks, Threatens Courts-Martial to Stop New Leaks
The military could issue USB storage devices and identity tokens that keep their information internally encrypted and which only work on sirpnet-trusted computers.

Scenario: Anything copied to the USB device is internally encrypted, offline, with one of the military's public keys. This process requires no network-side authentication, but would require the soldier's "identity key" to also be plugged in and "sign" the contents.

Putting the storage device in a non-trusted computer means the contents are not retrievable.

To decrypt the contents of the device, you have to first authenticate to sirpnet from a trusted computer. It's then and only then that the computer is allowed to unlock the information on the removable drive.

This method is not safe to hardware reverse-engineering, but should be safe enough for operational use.

iwr··on The secret to fighting poverty is New Zealand
In short: make life easy for skilled migrants and your economy will do good.

I'll say it's simpler than that: make sure immigrants get to sustain themselves through work rather than welfare. This creates a direct incentive for them to learn the language and actually integrate into the new society.

The great problem Europe has with migrants is not the inherent "poor imported stock", but the lean welfare rules and strict employment rules. This ensures a toxic proportion of new arrivals simply don't want to or can't integrate. It also means you get second-generation immigrants with no better prospects than their parents.

iwr··on What does it feel like to be stupid? An anonymous Quora user explains.
Sadly, the nature of the internet is that unduplicated content will die out within a few years. It should be OK to wholly copy an article, while at the same time pointing back to the original piece and original author.

Granted, the duplicator in this case should have made the original author more visible.

iwr··on How to remain calm, despite what's about to happen to your Chrome notebook
Anyone remember old YouOS? Google apps needs a more desktop feel before people get comfortable using purpose web machines.
iwr··on Digitally resurrect dead actors?
The proper term is "resimulants" or "resimulated persons" (from Charlie Stross' Accelerando)
iwr··on On the Cruelty Of Really Teaching Computer Science[pdf]
Good penmanship, by the way (date: 1988). Do young kids today get to practice their handwriting much?

Good stuff so far: "By evoking the need for deep conceptual hierarchies, the automatic computer confronts us with a radically new intellectual challenge that has no precedent in our history."

iwr··on Most Scientists in the U.S. Are Democrats. That's a Problem
What does it mean to be a "scientist" in the US? Is it strictly a person in academia who is in the pursuit of research grants?

Does it also include private sector researchers and engineers?

Page 1 of 10Next →