See also more-itertools for lots of other things in this vein.
1,191 karma · joined January 8, 2015
It wouldn't be hard, given one of these packages, to put the wrong file in.
Back in 2010 there were problems that came up when IANA started allocating out of 1.0.0.0/8 (e.g. [1]). Things that were once assumed to be unused started being used, leading to strange issues.
Also, why on earth would AT&T block 1.1.1.1 and not Google DNS and OpenDNS?
[1] https://bgpmon.net/issues-with-allocating-from-1-0-0-08/
Both IPv4 and IPv6 have a spot in their headers to tell what type of traffic is being carried. This is a 1-byte integer called a protocol number.
The TCP protocol is protocol number 6. UDP is 17. ICMP is 1. All are carried over IP.
Both IPv4 and IPv6 have another spot in their headers to identify their version. This is where 4 and 6 go, but it's not the same as the protocol number field.
Similarly, Ethernet has a protocol identification field, "EtherType." IPv4 is number 2048 (0x0800); IPv6 is 34525 (0x86DD)
What I'm saying is that "Trump doesn't like CNN" is a silly explanation for DOJ wanting either AT&T to spin off DTV or for Time Warner to spin off Turner Broadcasting.
Maybe the latter scenario somehow influences CNN's coverage, but it's an extremely tenuous link.
The DOJ is asking for either DirecTV or Turner Broadcasting be excluded from the deal, because being under the same roof would be a huge boost to DirectTV over its competitors - cable companies and Dish Network.
Turner Broadcasting includes several channels. Both TNT and TBS are probably more important to the deal than CNN (the former has higher ratings than CNN across the board; the latter does in primetime); the idea that it's the sole focus for DOJ is highly questionable.
Furthermore, how does DOJ's actual demand hurt CNN? AT&T could spin out Time Warner and keep the Turner channels. Or even if Time Warner spun out the Turner channels, they wouldn't go away (they were independent of Time Warner in the 1990s).
I'm as anti-Trump as the next guy, but the idea that there's not a rational basis for DOJ's demand is simply mistaken.
This is like breaking my fingers - I'm so much slower now. It's not just that there's a difference - I can adapt to that. It's that they've re-labeled menu entries with duplicate index keys. You can't do some things quickly now (e.g. optimize column widths with Alt-O-M-O, which worked for years).
There's a reason why MS Excel has keyboard shortcuts that make no sense - they match to menu entries from old versions, and they've kept them in so people who have been using it for decades don't have a reason to switch.
Please, LibreOffice developers, make your menu shortcuts sensible again!
By comparison, economists have estimated $125K/job-year to $202K/job-year from the 2009 stimulus (ARRA). [1]
[1] https://files.stlouisfed.org/files/htdocs/publications/revie... , page 3
Market cap is "price of one share" multiplied by the total number of shares outstanding.
If you want to buy a small number of shares, you can probably just multiply to find the total price you would pay.
If you want to buy a large number of shares, or the whole company, you can't just multiply. You would need to get the current owners to sell to you, and they might either charge you a premium or refuse to sell. The total worth of a company depends on the distribution and type of ownership (among many other things).
Market cap is a fine shorthand, but serious analysis about comparing worth should control for several other things.
At work I co-develop an open source Python library for reading VPC Flow Logs - it can be an easy way to get started analyzing them for security: https://github.com/obsrvbl/flowlogs-reader
As the second article points out, even this is kind of crazy, and the implementors didn't seem to care at all about what the results were - for example, the imaging category is driven by a single measure related to abdominal CT scans.
CMS, the federal agency that administers Medicare, introduced a hospital quality ratings system last year. It is supposed to combine a variety of objective metrics into an easy-to-understand grade for hospitals.
However, the techniques they used are really bad. For example, a programming error makes the model give different results depending on how the data are sorted. Some measures get negative weights, meaning a hospital should do worse to get a better rating.
I wrote more about the technical failures here: https://sites.google.com/site/bbayles/index/cms-star-ratings
Another criticism: http://jktgfoundation.org/data/An_Analysis_of_the_Medicare_H...
When I was a small child I was run over by a car and severely burned (by the catalytic converter). I had to have multiple skin grafts, one fairly large.
At the time (1987), a temporary measure was to graft pig's skin over the burn. This is apparently still done today, but this new process's product (and others) could conceivably be used instead.
After the temporary graft I got autografts, which involves cutting skin off an un-burned area and applying it to a burned area. This was pretty painful†, and I wound up with a bad infection on the donor site.
The grafts have been fine ever since, but they're pretty unsightly (thankfully my clothes cover them). I also have the scar from the donor site (worsened by the infection). The artificial skin produced by these new printers will hopefully prevent some of these issues.
† I have memories of hurting from this, but I was only 1.5 years old, so I'm not sure if they're really memories or interpolations of things I've been told.
When I first visited the office they went over why I might not want to do the procedure.
Once they confirmed I was still interested, they did human and machine measurements and tests of my eyes, and showed me the results and told me what they meant. They took care to explain their error correction procedures.
After they'd done their tests they told me what the procedure would cost and scheduled it right away They explained what I'd need to do after the procedure (eye drops and followup visits) and what that would cost.
The day of, they saw me promptly. They did more verification, and then the procedure. They made sure I understood my instructions for post-op care (correcting my misunderstanding about some eye drops).
The procedure cost what they said it would, and at each followup appointment I was seen promptly and kept in the loop about my status.
That is, suppose you believe (as I do) that D.T. and his supporters are quite dangerous. If they are using my behavior to gain strength, it behooves me to change my behavior!
There's nothing magic about what you'll learn, and a lot seems pretty elementary. But go before you have a problem! This is one of the best things my partner and I have done. We know that if we have an issue there's someone we can talk to for help, and because we go regularly there's no stigma with going.
I personally enjoy Marginal Revolution (Alex Tabarrok and Tyler Cowen), Confessions of a Supply-Side Liberal (Miles Kimball), and The Money Illusion (Scott Sumner).
I would recommend some pop-econ to become familiar with a stylized version of how economists think. I'd recommend Tim Harford's The Undercover Economist Strikes Back and The Logic of Life and Robert Frank's The Economic Naturalist. (Dubner's and Levitt's books are entertaining, but I wouldn't try to learn much about economics from them)
The world of professional economists has been fascinating to watch over the last 10 years, as academic economist blogs are very active and very high quality. Watching debates and commentary about the global financial crises unfold on the blogs in real time was really something. Economist bloggers have a real influence on policy now, and whole schools of thought have coalesced out of blogs (e.g. market monetarism).
There are some excellent economics podcasts out there now. EconTalk (with Russ Roberts) has been going since 2006. I'd recommend listening to some of his interviews with academic economists. Macro Musings (with David Beckworth) just started this year, and the policy discussions have been quite informative.
The Marginal Revolution University website has an fantastic series of videos on economics topics. The "Development Economics" course I would recommend strongly - I wish I'd been taught the Solow Model in school.
Economics is a very interesting discipline to study from the outside. Learning a bit about it puts policy debates in a new light - I've become much more liberal on some topics and much less confident on a lot of topics. I find that reporting about economics issues is generally pretty terrible, so beware that if you get into economics you'll want to stop reading a lot of news analysis.
I'll probably do something like that again - it would be great if there were a good list of projects that are looking for maintainers.