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rpenm

577 karma · joined September 8, 2013

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rpenm··on Printed Solar Panels for Less Than $10 a Square Metre
1000W/m^2 is average daily peak irradiance. That number is useful for designing system capacity, but doesn't reflect output throughout the day.
rpenm··on Delaney Introduces Bill to End Gerrymandering, Reform Elections
Cooperation can be optimal for an infinitely repeated prisoner's dilemma depending on prisoner's time preference (discount factor).
rpenm··on Verizon closes $4.5B acquisition of Yahoo, Marissa Mayer resigns
It is much easier to compare companies that sell identical commodities.
rpenm··on What Self-Driving Cars See
Adding additional methods for self-driving vehicles to signal state to other road users would be helpful in this regard.
rpenm··on ‘The Wire’ – Game Day
There are a few other characters who escaped eg. Poot, Namond and Cutty.
rpenm··on Teacher spends two days as a student (2014)
It's just a heuristic along the lines of Occam's Razor. Competent malice is less likely than incompetence, all else being equal. Normative motivations are irrelevant.
rpenm··on High prevalence of diabetes among people exposed to organophosphates in India
From the cited paper:

"In summary, findings conclusively demonstrate that consumer exposures to the ten most frequently detected pesticides on EWG's “Dirty Dozen” commodity list are at negligible levels and that the EWG methodology is insufficient to allow any meaningful rankings among commodities."

rpenm··on Librarians in Florida went rogue to save 2,300 books from an algorithm
There's no such thing as an unbiased algorithm. Machines just amplify the biases of their users. Every choice reflects implicit values and assumptions. More so when you're trying to develop an objective function around the unknown preferences of future library users. What is popular today may not be tomorrow.

And you should really be asking yourself whether circulation numbers are a good proxy for the real value that people derive from the collection. My mother used to borrow ten books at a time and barely read any of them. Building a rigorous utility-maximizing model here is impossible. Human judgement is required.

rpenm··on [dead]
It's despicable behavior and bad for the future of NC state government. But it's neither fascist nor a coup. Expect court challenges.
rpenm··on To influence people don't try to persuade them, use ‘pre-suasion’ instead
The study you cite shows an opposite result.

Are there independent replications that actually show the same effect? I recall an attempted replication that produced equal miscalibrations on the upper and lower ends of the distribution, suggesting that the effect was just mean regression.

rpenm··on Universities have turned over hundreds of patents to patent trolls
>The fact that you can just sell patents always seemed a little bit off to me.

It is a long way from a patentable idea to a marketable product. So what happens when the patent originator lacks the competencies or capital to produce at scale? If selling a patent was banned, both the innovator and society would be denied any benefit from the innovation.

rpenm··on Bushido: Way of Total Bullshit
Mishima was as influenced by ultranationalism and the bushido mythos as anyone - to the point that he committed suicide during an attempt to restore the emperor. I don't think his writing counts as counterexample.
rpenm··on Pre-Touch Sensing for Mobile Interaction [video]
IR illumination would be a solution for the lights-off case.
rpenm··on What a ball pen tells us about China’s manufacturing weakness
0.1mm balls are unusual - 1.0mm is more typical (eg. standard BIC pens).
rpenm··on The arms race for anti-drone weaponry
Not relevant, since the users being discussed are law enforcement.
rpenm··on Jackfruit could save millions from starvation
Kathal kebab is fairly close to "tandoori jackfruit".
rpenm··on Jackfruit could save millions from starvation
I can't speak for everyone in Andhra, but cooked jackfruit regularly appears at my family's meals. More commonly eaten in the village than the city, perhaps. Popular with devout or health-conscious folks as a meat substitute.

My cousin's father-in-law served jackfruit biryani at his wedding banquet.

rpenm··on U.S. honeybee colonies hit a 20-year high
Interestingly, European bees hybridized with African bees seem to be quite resistant to CCD. Makes me wonder if one of the problems afflicting American honeybees is a lack of genetic diversity.
rpenm··on Lost Posture: Why Indigenous Cultures Don't Have Back Pain
I wouldn't be surprised if most of that flexibility in Asian cultures comes from using a squat toilet (or open defecation) everyday.
rpenm··on Researchers reverse bacterial resistance to antibiotics
Journal article here: http://journals.plos.org/plosone/article?id=10.1371/journal....
rpenm··on Why we have chins
The overbite-utensil hypothesis is interesting. But why do overbites exist in modern human societies that eat almost entirely with their hands?
rpenm··on The Nanda Devi mystery – Plutonium lost on India’s second highest mountain
Reactor-grade plutonium in the headwaters of the Ganges, which supplies millions of people. Probably better if it was stolen than lost.
rpenm··on The Thinkers Behind Musk’s Fear: Russell, Bostrom, and Omohundro
Shareholder value over what time horizon? Not such an obvious objective function.
rpenm··on The Digital Music Industry Is Inept (2012)
I hate undated blog entries.
rpenm··on The Digital Music Industry Is Inept (2012)
He mentions sending "cease and desist" letters - unclear if that means DMCA notices.

He actually mentions receiving a DMCA notice for his own work despite providing proof of ownership to Youtube (but misspells DMCA, thus evading your search).

rpenm··on The dystopian lake filled by the world’s tech lust
The writer does seem predisposed to casting everything in a sinister light. Apparently production is bad (environmental costs) but so are production cuts (market manipulation).

I find this sort of first-person journalism interesting, but not terribly credible. It lacks perspective or insight. Not a single local is quoted.

rpenm··on We Should Have a Better Condom by Now
Not orthogonal: the article discusses the role of size in breakage and comfort. It also discusses how the FDA forced TheyFit to discontinue their custom-fit condoms due to unreasonable ASTM testing requirements.
rpenm··on World's largest aircraft looking for investors to give it liftoff
Compress the helium into tanks and use atmosphere as ballast. Ballast can be dropped by directly purging with helium. Alternatively, contain the ballast in bladders that vent as helium pressure rises. Designing flexible bladders that don't leak too badly would be an engineering problem. A terribly inefficient option would be to allow the gasses to mix and just use fractionation to separate the heavy elements when dropping ballast.
rpenm··on Most of Us Don’t Download Any Smartphone Apps at All
'Most' of us were not born 'in any given month'. That doesn't mean we weren't born 'at all'. Inaccurate headline.
rpenm··on As California Drought Enters 4th Year, Conservation Efforts and Worries Increase
Adding a separate salt water supply infrastructure would be expensive. Salt water is also quite corrosive; pipes, fittings and fixtures would have to be designed/tested for such use. Besides, having my clothes, dishes and body perpetually crusted in salt is not appealing.

You'd be better off subsidizing grey water systems. Or better yet, focusing on larger scale inefficiencies in agriculture. Or push for market-pricing so individuals/businesses have incentive to pursue efficiencies.

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