matthiasl

10 ms·

61.
by matthiasl 13y ago
In addition to what 'stevek' wrote; the Europlug was designed so that it would fit many existing, incompatible European plugs. One of the things that makes the European plugs incompatible is that they ahve different types of earth
62.
by matthiasl 13y ago
It looks like a class action lawsuit was filed against JustFab. The complaint starts like this: "Plaintiff Edna Betances-Harold, on behalf of herself and others similarly situated, brings this class action complaint against De
63.
by matthiasl 13y ago
Hydrochloric acid is HCl. You write that it "decompose[s] to basic elements". Are you saying that HCl turns into H_2 and Cl_2, i.e. hydrogen gas and chlorine gas? Can you explain this reaction?
64.
by matthiasl 13y ago
About the PIN: your guess is right. The tone system for dialling numbers works like this: there are four "low" frequencies (697, 770, 852, 941 Hz) and four "high" frequencies (1209, 1336, 1477, 1633 Hz). Each key plays e
65.
by matthiasl 13y ago
As a sibling comment mentioned, it's possible there was a diode somewhere in the system. Another possibility is that the motors in the slot cars had electromagnets for the stationary field instead of permanent magnets. That's what
66.
by matthiasl 13y ago
This note from the US National Fire Data Center: http://www.usfa.fema.gov/downloads/pdf/tfrs/v11i4.pdf suggests that a few hundred people die every year in the US because of fires started by people smoki
67.
by matthiasl 13y ago
An interesting thing is that many subway systems recover some of the kinetic energy by converting it to something more useful than heat. Some subways, for instance London's, are built with uphill slopes prior to stations, so that part
68.
by matthiasl 13y ago
I like that idea too. The FFII (not known for their love of the patent system as used for software in some places) has proposed a more complex approach based on that idea, where there's a bounty system in place to act as a sort of garb
69.
by matthiasl 13y ago
I'm a local. This is the first time I've heard of Uber, so in a sense the PR has worked. Looking at the 20 or so comments (in Swedish) below Uber's original press release/blog entry ( http://blog.uber.com/2013/04/25/transportstyrelsen-forso
70.
by matthiasl 14y ago
I am not an expert in the field, but a quick look through the product pages at 3M suggests that the important difference is the boiling point. Novec boils at 49 degrees C, so for cooling electronics the primary mode of heat transfer will be
71.
by matthiasl 14y ago
SCTP is widely used for carrying signalling in mobile and fixed telephone networks. It is _the_ way of carrying SS7 over IP. (Another angle on the same thing: it didn't get used much outside the thing it was originally designed for.)
72.
by matthiasl 14y ago
Is "phase cancellation" a general term for situations where two signals cancel out each other? (I'm rusty at this, but when I read 'phase', I think of a time difference between two signals. In this case, there's no time difference.)
73.
by matthiasl 14y ago
That was an interesting link, thanks. I liked other parts of the site too, for instance http://speleotrove.com/decimal/ Any idea what decimal floating point is used for? (I have little to no idea about CAD or financial software. I can see
74.
by matthiasl 15y ago
I think two things are interesting here. 1: "when does Erlang GC a process' heap?" and 2: "where does Erlang keep a process' data?". 1: Erlang GCs a process' heap whenever that process' heap gets full, or when you call erlang:garbage_
75.
by matthiasl 15y ago
What do Hacker News users use it for? I use it to solve mathematics problems when my rusty skills fail me. Best example: I needed to see what a pulse, f(t), specified as ten coordinates looked like after passing it through a transfer functi
76.
by matthiasl 15y ago
If kids causing traffic jams was a real problem, why doesn't it already happen all the time on pedestrian crossings?
77.
by matthiasl 15y ago
According to wikipedia, the average loss on the power lines is 7%. Source: https://en.wikipedia.org/wiki/Electric_power_transmission#Lo... That's not what I'd call "huge".
78.
by matthiasl 15y ago
Is A/B testing a greedy algorithm? I don't know much about A/B testing, nor have I done any. My first thought is: how do you avoid getting stuck on local maxima? (The wikipedia article on A/B testing mentions A/B..Z testing and 'multivarian
79.
by matthiasl 15y ago
His native language is English. He's just sloppy. He's been in Sweden for decades and speaks Swedish with a typical English accent. Source 1: My opinion. I've met him many times. Source 2: His thesis states that he started at the Ericsson C
80.
by matthiasl 15y ago
Why is this a fundamental feature of message queues any more than of other things? (you can make a data structure which makes memory explode, for instance lists:seq(1, 123456789123456), you can make a program which makes memory explode, for
81.
by matthiasl 15y ago
If you want a message queue bounded to length N, then make the messaging protocol such that the sending process sends up to N messages without an ack.
82.
by matthiasl 16y ago
I've heard of depleted uranium, but depleted plutonium is new to me. Googling a bit, I think you mean depleted uranium, but perhaps wrote 'plutonium' because one of the problems with depleted uranium is that it is (often?) contaminated with
83.
by matthiasl 16y ago
R means release 14 is the major release number B is the minor release 'number'. By convention, 'A' is not considered ready for production, whereas 'B' and later are. 02 is the 'patch level', i.e. an even more minor release number This schem
84.
by matthiasl 16y ago
Can anyone else repeat his experiment? I tried repeating the experiment. I'm in Sweden, so, annoyingly, a request to google.com redirects to google.se. If I send my request directly to google.se, I get 9k response in 130ms and the initial w
85.
by matthiasl 16y ago
Companies with telecom products are generally conservative about switching Erlang versions. Most of Corelatus' production systems run R11B-5. Quite a few still run R9C-2. There's no compelling reason to upgrade them, there are thousands of
86.
by matthiasl 17y ago
As other commenters have pointed out, both here and on the blog itself, the blog post assumes that a dollar taken out in fees in 2010 is worth the same as a dollar taken out in 2160. Depending on how you want to look at that, it's either ig
87.
by matthiasl 17y ago
On a normal wheel, the bearings travel a much shorter distance than the wheel. On this wheel, the bearings travel the same distance as the wheel. That makes me wonder if the friction due to bearings is much larger in this type of wheel. I h
88.
Plotting GPS data extracted from millions of Flickr photos to generate a map(cs.cornell.edu)
4 points by matthiasl 17y ago|0 comments