Very interesting - notice that all the countries included are actually the same (as in no statistically significant difference). The 95% confidence interval is far larger than the difference between first and last place.
Umm... That's not the confidence interval you're looking at... The small grey boxes imediately around the mean score data point are the confidence intervals (quite small, comparatively).
The big bars surrounding the mean score data point shows where all the other data from the 5th to 95th percentiles fell per student... ie. The data point isn't being pulled up or down by the highest and lowest 5th percentiles...
I'd explain it further, but there's math involved...;-)
Japanese schoolchildren in the city of Osaka will be tagged with RFID tags.
... a Mutual of Omaha Special.
Come with us now as we study the migratory patterns of the Japanese School Child.
[Helicoptor flys over a school yard full of children, one is separated out from the herd and tranqualized with a dart, scientist staples an RFID tag in his ear...]
If you get the chance, see the movie "Startup.com"
I second the suggestion to rent Startup.com!
I saw it a week or two ago. The most interesting thing about it is that it's the real footage of a startup right from the beginning (and to the end...). Originally, a friend of the CEO (an ex-MTV VJ) wanted to make a documentary about the 20-something millionaires and all the opportunity that the Internet brought to young entrepreneurs... It turned out to be a record of the dotcom bust.
They call it a microkernel in the sense that its internal design is very modular. The core kernel ntoskrnl.exe is the microkernel part, which concentrates entirely on process scheduling, memory management, interrupts and interprocess communication.
If I call my '76 Volkswagon Bug a Porche in the sense that some of the engine parts are interchangable it doesn't make it so, no matter how many whitepapers Bill writes!;)
The definition of a microkernel is that what runs in kernel space is kept to a minimum. It doesn't matter how the other functions are distributed into different files if they execute in kernel space...
W.r.t. the Browser etc..., I meant it more humourously than anything else... I *may* have missed the mark.;)
I sometimes think that people who do not have a scientist mindset mistake heated debate among scientists for petty emotional rancor. The latter does happen, but heated debate is not a definitive indicator.
A bit off topic, but your post reminded me of a funny family story along these lines...
Before my wife and I got married, my Brother, Dad, future Wife and I went to see my Grandfather. It was the first time she had met my him and she seemed a bit shy during the visit (didn't really seem like her...)
On the drive home with just me and my f.w. in our car, she told me how *horrible* we all were to each other and she couldn't believe how we talked to our sweet old Grandad!;)
It was difficult to explain to her that we where "Discussing Enthusiastically" (TM), nothing more...
She got used to visits with Grandad... (It's a good thing to, I'd of missed her;)
Re: microkernels the best approach
on
More From Tanenbaum
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· Score: 5, Informative
If you want successful microkernels, look at NT and Darwin
Hmmm, No...
It's a widely perpetuated myth that NT is a microkernel. It may have started out that way, but has long since grown through millikernel, centikernel, decikernel to full blown kernel... (and beyond if you count browser, media player and kitchen sink OS embedding)
The linked letter from Prof Tanenbaum touches on this point too... He says:
Microsoft claimed that Windows NT 3.51 was a microkernel. It wasn't. It wasn't even close. Even they dropped the claim with NT 4.0.
Bends, more correctly known as decompression sickness, is caused by rapid decompression i.e. ascending too quickly. It is not caused by how long you were underwater as you had claimed.
Please take a refresher course before you hurt yourself...
The reason your PADI "wheel" has No-D times listed on it that get shorter as you set it to deeper and deeper depths is *exactly* because likelyhood of decompression sickness depends on time and depth (pressure, more accurately - which is directly proportional to depth for our purposes)
DCS also depends on maintaining a resonable ascent rate, as you say, but you're at greater risk of an air embolism on rapid ascents than you are for DCS.
First this is for real, have seen them advertised many places
Didn't they used to be advertised as SCUBA "BOB"? (Shakes head at silly name...)
I don't meant to be picky (and not to pick on your post) but I see the following a lot in the dive industry:
Third you dont have to be certified to use this. fourth, its failsafe in many ways that scuba is not. The number one danger in scuba is forgetting to exhale when ascending
I think that the number one danger is diving beyond your training... We creatures weren't meant to go underwater for more than a couple minutes at a time, we need to bring life support equipment with us to acheive this and we need training to use that equipment, even for the SCUBADOO! (But I'll conceed that you don't need a full SCUBA course, but you should be comfortable and confident underwater.)
On the other hand the joy of scuba diving is the freedom of 3-D orientation. Drift in a current head down. try to use as little effort as possible
ABSOLUTELY! This is as close to weightlessness as most of us will achieve! Like flying without the few tonnes of airplane fuselage wrapped around you (and wetter, I guess...)
True with a proper ascent it isn't an issue but what happens when joe user gets freaked out by that eel snapping at his heel and points straight up
Indeed. This does nothing to stop someone from panicing and bolting to the surface (likely holding their last "SCUBADOO" breath all the way).
The thing that bothers me about these gagets that you see from the dive industry periodically is that they often offer them as an alternative to proper training.
SCUBA is a safe sport, _but_, it is very unforgiving to mistakes and that's why proper training is so important.
At that depth [~30ft] USN gives you about 4 or 5hrs (I don't have my tables in front of me...). Even DCIEM gives you over 2hrs (150mins if my memory serves).
Pls excuse my self-reply...
Just checked the tables: USN: 310 mins DCIEM: 300mins (Not a big diff at the low depths...)
Nitrogen tissue loading, too rapid ascent and decompression sickness after being submerged for up to an hour is an issue.
Getting bent isn't even the issue here... These things are meant for toddling along a reef at 30 ft and up. At that depth USN gives you about 4 or 5hrs (I don't have my tables in front of me...). Even DCIEM gives you over 2hrs (150mins if my memory serves).
The issue here is air embolism, where your lungs burst due to trapped expanding air as you go from 2atm (30ft) to 1atm(surface) and the volume of that air doubles... (*splat*):(
At the depth these things are designed to be used nitrogen narcosis isn't going to be an issue.
Getting Narc'd has nothing to do with exhaling on ascent...
You exhale (actually, more accurately, you breath normally, _not_ holding a breath) on ascent to avoid an air embolism -- Much nastier than getting Narc'd, which is most often more like feeling drunk... (but occationally can be feeling of fear or paranoia), not something you want when you're diving!
Re:What, no editorial?
on
Red Hat Recap
·
· Score: 3, Informative
I spoke with RedHat several months ago about this issue and here's the deal. You are free to place RHEL on as many machines as you'd like without even violating your l
license.
I don't think that this is correct... I hope you got it in writing from your RH contact;)
Q [#5]: How are the Red Hat Enterprise Linux products delivered, in terms of services and prices?
A: The basic delivery model for Red Hat Enterprise Linux 3 is unchanged from Red Hat Enterprise Linux 2.1. Red Hat Enterprise Linux products are sold on an annual subscription basis. As mentioned above, under the terms of the Red Hat Enterprise Linux usage agreement, a subscription is required for every system on which Red Hat Enterprise Linux is installed.[...] (emphasis mine)
Q [#6]:You mentioned licensing - what does this mean? I thought Linux was free.
A: Except for a few components provided by third parties (for example, Java) all the code in Red Hat products is open source and licensed under the GPL (or a similar license, such as the LGPL). So you always have free access to the source code. In fact you can download it from our FTP servers at any time.[...]
Re:At a loss....
on
Red Hat Recap
·
· Score: 2, Informative
I'm not sure why I was moderated down here...
From the RHEL FAQ Questions #5 and #6
5) (...)As mentioned above, under the terms of the Red Hat Enterprise Linux usage agreement, a subscription is required for every system on which Red Hat Enterprise Linux is installed.(...)
6) Except for a few components provided by third parties (for example, Java) all the code in Red Hat products is open source and licensed under the GPL (or a similar license, such as the LGPL). So you always have free access to the source code. In fact you can download it from our FTP servers at any time (...)
Also, if you do not care for support you can take RHEL and install it on several computers with as many CPUs as you wish.
As far as I understand it the restrictives terms are only about SUPPORT and not redistribution.
This isn't correct...
The RHEL binary RPMs and ISOs are distributed under a per-machine/per-year cost subscription license. You cannot (legally) install more copies than you have licenses for, irrespective of support options.
This is all fine in the eyes of the GPL, which talks about _source_ redistribution. To remain compliant RH must make the SRPMs available for download for the GPL'd software in RHEL.
This is why the RHEL clones (taolinux.org, etc...) are possible and in fact practically identical to RHEL. They have taken all the GPL SRPMs and recompiled them. The handfull of remaining RPMs are RH trademarked logos and the like. These packages get replaced by custom artwork.
Slashdot Mirror
Umm... That's not the confidence interval you're looking at... The small grey boxes imediately around the mean score data point are the confidence intervals (quite small, comparatively).
The big bars surrounding the mean score data point shows where all the other data from the 5th to 95th percentiles fell per student... ie. The data point isn't being pulled up or down by the highest and lowest 5th percentiles...
I'd explain it further, but there's math involved... ;-)
An interesting observation I've heard along theses lines (Don't remember where I heard it...)
Ask the damn dirty apes...
Come with us now as we study the migratory patterns of the Japanese School Child.
[Helicoptor flys over a school yard full of children, one is separated out from the herd and tranqualized with a dart, scientist staples an RFID tag in his ear...]
Ya, and look at the *disaster* that turned out to be ;)
(Won't waste another month on that... ;)
If your payload is a bomb, the fire hazzard is a bit of a plus! ;)
Naww, that'd just be mean...
Jam pennies between the door and door frame to 'lock' them into their flooded, 10x10 cel^H^H^Hroom ;)
I second the suggestion to rent Startup.com!
I saw it a week or two ago. The most interesting thing about it is that it's the real footage of a startup right from the beginning (and to the end...). Originally, a friend of the CEO (an ex-MTV VJ) wanted to make a documentary about the 20-something millionaires and all the opportunity that the Internet brought to young entrepreneurs... It turned out to be a record of the dotcom bust.
It's funny, Laugh...
You may already know this, but for the benefit of some of our other readers...
When trapped in your room by a live leaner, crack the door open a little bit, then snap it closed. If you do it right, the leaner will be diffused.
Then make sure you find who did it and penny them into their rooms. That's a lot harder to open from the inside ;)
If I call my '76 Volkswagon Bug a Porche in the sense that some of the engine parts are interchangable it doesn't make it so, no matter how many whitepapers Bill writes! ;)
The definition of a microkernel is that what runs in kernel space is kept to a minimum. It doesn't matter how the other functions are distributed into different files if they execute in kernel space...
W.r.t. the Browser etc..., I meant it more humourously than anything else... I *may* have missed the mark. ;)
A bit off topic, but your post reminded me of a funny family story along these lines...
Before my wife and I got married, my Brother, Dad, future Wife and I went to see my Grandfather. It was the first time she had met my him and she seemed a bit shy during the visit (didn't really seem like her...)
On the drive home with just me and my f.w. in our car, she told me how *horrible* we all were to each other and she couldn't believe how we talked to our sweet old Grandad! ;)
It was difficult to explain to her that we where "Discussing Enthusiastically" (TM), nothing more...
She got used to visits with Grandad... (It's a good thing to, I'd of missed her ;)
Hmmm, No...
It's a widely perpetuated myth that NT is a microkernel. It may have started out that way, but has long since grown through millikernel, centikernel, decikernel to full blown kernel... (and beyond if you count browser, media player and kitchen sink OS embedding)
The linked letter from Prof Tanenbaum touches on this point too... He says:
What?, now they're comparing Wintel IIS webservers to a mainframe web server??
(PS: "Neon" is the name of IBM's web server software environment under OS/390 and zOS ;-)
Please take a refresher course before you hurt yourself...
The reason your PADI "wheel" has No-D times listed on it that get shorter as you set it to deeper and deeper depths is *exactly* because likelyhood of decompression sickness depends on time and depth (pressure, more accurately - which is directly proportional to depth for our purposes)
DCS also depends on maintaining a resonable ascent rate, as you say, but you're at greater risk of an air embolism on rapid ascents than you are for DCS.
(ACUC Instructor: 1158EA).
I thought we had it good with a 16ft pool for SCUBA (McMaster U). Equipment retrieval drills must be killer in your courses ;)
Still beats the typical 7-8 ft ones most dive shops train in, you could almost stand up and be dry ;)
Didn't they used to be advertised as SCUBA "BOB"? (Shakes head at silly name...)
I don't meant to be picky (and not to pick on your post) but I see the following a lot in the dive industry:
I think that the number one danger is diving beyond your training... We creatures weren't meant to go underwater for more than a couple minutes at a time, we need to bring life support equipment with us to acheive this and we need training to use that equipment, even for the SCUBADOO! (But I'll conceed that you don't need a full SCUBA course, but you should be comfortable and confident underwater.)
ABSOLUTELY! This is as close to weightlessness as most of us will achieve! Like flying without the few tonnes of airplane fuselage wrapped around you (and wetter, I guess...)
Indeed. This does nothing to stop someone from panicing and bolting to the surface (likely holding their last "SCUBADOO" breath all the way).
The thing that bothers me about these gagets that you see from the dive industry periodically is that they often offer them as an alternative to proper training.
SCUBA is a safe sport, _but_, it is very unforgiving to mistakes and that's why proper training is so important.
You sound like a diver yourself!
Pls excuse my self-reply...
Just checked the tables: USN: 310 mins
DCIEM: 300mins
(Not a big diff at the low depths...)
Getting bent isn't even the issue here... These things are meant for toddling along a reef at 30 ft and up. At that depth USN gives you about 4 or 5hrs (I don't have my tables in front of me...). Even DCIEM gives you over 2hrs (150mins if my memory serves).
The issue here is air embolism, where your lungs burst due to trapped expanding air as you go from 2atm (30ft) to 1atm(surface) and the volume of that air doubles... (*splat*) :(
You exhale (actually, more accurately, you breath normally, _not_ holding a breath) on ascent to avoid an air embolism -- Much nastier than getting Narc'd, which is most often more like feeling drunk... (but occationally can be feeling of fear or paranoia), not something you want when you're diving!
I don't think that this is correct... I hope you got it in writing from your RH contact ;)
From the RHEL FAQ on the RH site, Questions #5 and #6:
Q [#5]: How are the Red Hat Enterprise Linux products delivered, in terms of services and prices?
A: The basic delivery model for Red Hat Enterprise Linux 3 is unchanged from Red Hat Enterprise Linux 2.1. Red Hat Enterprise Linux products are sold on an annual subscription basis. As mentioned above, under the terms of the Red Hat Enterprise Linux usage agreement, a subscription is required for every system on which Red Hat Enterprise Linux is installed.[...] (emphasis mine)
Q [#6]:You mentioned licensing - what does this mean? I thought Linux was free.
A: Except for a few components provided by third parties (for example, Java) all the code in Red Hat products is open source and licensed under the GPL (or a similar license, such as the LGPL). So you always have free access to the source code. In fact you can download it from our FTP servers at any time.[...]
This isn't correct...
The RHEL binary RPMs and ISOs are distributed under a per-machine/per-year cost subscription license. You cannot (legally) install more copies than you have licenses for, irrespective of support options.
This is all fine in the eyes of the GPL, which talks about _source_ redistribution. To remain compliant RH must make the SRPMs available for download for the GPL'd software in RHEL.
This is why the RHEL clones (taolinux.org, etc...) are possible and in fact practically identical to RHEL. They have taken all the GPL SRPMs and recompiled them. The handfull of remaining RPMs are RH trademarked logos and the like. These packages get replaced by custom artwork.