You have to wonder who's smarter. The average consumer who buys a generic card at the cheapest price (found with a lot of research) or the nerd who buys a ultra high end branded card(found with a lot of research) at the highest possible price.
The expensive high performance cards are also the ones with the 1 million erase cycles, versus the 10,000 erase cycles of the cheap CF.
So who is smarter? The person who saved 25%-75% or the person who bought the card which will last 100 times longer?
Hate to break it to you, but DSLR's can't take full motion movies. Second of all, why are you downloading images tethered? Get a usb 2.0 card reader!
He said he got a firewire reader. BTW, I've never seen 480M/s USB2 outperform 400M/s firewire. All my firewire gear is WAY faster than my USB2 gear, including the devices which include both.
Why does everybody test performance, but nobody tests durability? What good is a ginormous flash card that stores your images in a fraction of a second when it trashes the FAT after some 10000 writes because the flash cells can't take anymore writes. There go the once in a lifetime shots.
From what I have read, the fast cards are also the most durable. They tend to be made of the single layer CF. It's the really large but slower multi-layer CF which don't last long.
Even running an engine with no oil in it to lubricate the moving parts and reduce friction will not break metal, it will simply reduce the power and efficiency of the engine.
Run a typical combustion engine with NO lubrication and you will get increased friction and thus increased heat and thus eventually a seized engine which might even include pistons which have welded themselves into the cylinder.
Metal does not wear out or break, at least not in our lifetimes.
What the hell are you talking about? I've worked in gear systems with Navy equipment and printers and it was quite common to see metal to metal gears wearing each other out. I often saw metal-plastic-metal gears because it actually increased the life of low-torque gear-boxes and even then only the plastic gears needed replacing. This was done because metal does wear out against metal.
Most of the specs define physical and electrical characteristics, the speed and performance is somewhat abstracted, the device will tell you when it's done, or when it want more data, and can do so in it's own sweet time.
Interface specs usually do define signal rates and word size (for parrallel). So specs usually do define a top speed. Certainly in the case of CF.
(Of course serial interfaces also define word sizes and sometimes allow for various sizes, however that typically does not change the bits/second rate by much, if at all, depending on the spec.)
You'd think cards developed to the same spec would have equal performance. Is that really not the case with SD or others? Interesting article.
I don't know about SD cards, but CF cards are compatible as IDE devices, which itself has various specs with varying performance. Various PIO and DMA modes, etc. This would be like comparing hard drives and then saying, "You'd think drives developed to the same spec would have equal performance".
Some cards are built using high density, low speed, low durability CF, while others go for lower density, high speed, high durability CF and multiples of them in one card. Some newer fast cards employ DMA modes over PIO. Also don't forget, the spec itself is not always the bottleneck, so individual models can vary in performance up to the limit of the particular spec used.
Also, I'm skeptical that you'll be getting 250 miles at 70 mph. If I remember right, electric motor efficiency and power typically increase with load, but fall off with speed, which makes them awesome for say, a 0-60 run in 3 seconds, but marginal at best for high speed cruising.
The major loads involved here are due to weight and drag. Weight mostly hurts acceleration and drag mostly hurts top speed. To double your top speed, you must quadruple your power. That should be a clear indication that there is plenty of load near the top speed of a vehicle.
Uh, you know the Mario character debuted in Donkey Kong, right? And again in DK Jr. And then yet again in Mario Brothers (the one with the crabs in tunnels and stuff). All of this way before before Super Mario Bros., let alone SMB2.
So the Mario character debuted how many times? ; )
They have a policy not to publicly disclose this info. This policy was set up for propriatary/closed source vendors. They just continued to follow that policy when dealing with an open source vendor. OpenSSL/OpenBSD will most likely tell the public this info at some point, but it still may be something they want to fix before publishing -- a practice which is common in both open and closed source products/projects.
Why would the OpenBSD project make public announcements on behalf of the seperate OpenSSL project? The OpenSSL project cannot speak for themselves?
The Dish is the lighthearted 'adapted' history of the Parkes observatories role in the tracking and transmission of the first lunar landings. Quite funny if you get Australian humour.
I loved the bit when they are greeting the US President in Parkes and they have a band play the USA national anthem.... out comes..... the Hawaii Five-O theme!
As an Aussie, I don't particularly like typical Aussie movies. I think it is because I feel we exaggerate our own mannerisms in a way which almost validates the exaggeration and very poor interpretation from other nationals making movies about us. At least we get the accent right. We do NOT sound like a cross between New Zealand and South Africa!
Very easily. They can have all the best recordkeeping procedures in the world, and still lose anything through poor recordkeeping practices despite procedure.
Someone obviously did not properly fill out form: ZT082-7465-826/AYG-46-B_1.03
At the time we started working this particular arrangement, more than a year ago, BitTorrent simply wasn't a workable option. I've not revisited it since then, but it's time to at least take another look.
Wonderful. Thanks for being open to the idea Brian.
BTW, I hope for a safe return for Discovery and the crew. And thank you all for your awesome work.
The other booster fell away below the field of view of this camera. The fuzzy object at 3:03-3:05 is lens flare, not a physical object.
So many times I have seen what is obviously lens flare, get pointed at by conspiracy nuts. A really funny one I saw, involved "UFO's" flying over the white house. These three "UFO's" were in a formation of a triangle from the cameras perspective. The triange of "UFO's" were arranged so that there were two above and at the same "altitude" and one below those.
Looking further down in the image, can clearly be seen three bright street lights forming a brighter mirror image of that triangle of "UFO's", where the middle point between the lights and the "UFO's" was also the middle point of the photograph. ; )
I saw this in a "revealing" documentary on UFO's, yet the FACT that the "lights in the sky" are just an unwanted optical effect within the lens of the camera taking the photo, was not revealed.
"We've gotten a lot of e-mail like this, so I thought it was worth addressing in a forum where folks who take a real interest in the technology spend time. We stream video clips, rather than making them available for downloading, to manage our bandwidth usage."
Would NASA be willing to make torrents available, to get the benefits of BitTorrent? The enthusiasts who want the high quality stuff, would be distributing the load amongst themselves while the videos are at their most popular. After that, the worst case would be the trickling of downloads from your servers once the crowd has dispersed.
I'm an Apple Mac OSX user (PPC) and I would really like to see the videos. Hi-res would be nice too.
I was hoping that the website would explain this. Did you RTFM? Assuming you did not. The advantage that still exists is that OTP, even over SMS is much harder to intercept than standing behind someone at an airport kioske or sniffing wireless networks...
This is hilarious. My idea of TFM is this. Your system does not provide the advantage of the One Time Pad. Which of course is encryption and perfect encryption at that. The advantage you seem to be summing this up with, is that the passwords are used only once. So that is a One Time Password system and nothing like a One Time Pad.
You could actually get the benefits of the One Time Pad to provide single use passwords, but not the way you want to do it. You could have a list of strong passwords on the target login server. You will need an OTP for each user on the server and you will also need to distribute the appropriate One Time Pads to each individual user. When a user wishes to log in, they enter their username and then a "challenge" is provided, which is really the password they have just been one-time allocated for that session, encrypted against that users next free One Time Pad block. The user decrypts the password from his One Time Pad and then logs in. At this point, that used One Time Pad block is erased from the users machine, the server and the one-time password is also erased.
Obviously there are major impracticalities to this and thus the general use of One Time Pads.
The first and worst, is that you need to generate non-algorithmically lots of decent One Time Pads on an on-going basis and then somehow distribute them to your users in a secure channel. If you had access to such a secure channel between you and your users at arbitrary times, you would not need the impractical One Time Pad.
Second, your users need to somehow securely store thier current One Time Pad and it needs to be capable of being securely erased really fast. Is this going to be done with more practical algorithmic crypto? If so, the perfect strength of the One Time Pad may be gone.
Third big problem is that you can't store password hashes on the server, instead of the passwords themselves, for the simple reason that sending a user a one-way hash of a password is not going to give them access.
There are lots of one time password systems. Why we should choose your system and how does it provides the benefits of the One Time Pad?
A PRNG is most definitely a viable cryptosystem, if it is strong enough.
PRNG's are not crypto. PRNG+password_as_seed+XOR on the other hand, can be. With the strength being limited to the PRNG and password.
I'm sure you know this, I am just setting the story straight because people are bound to misinterpret what you said as literally meaning "Pseudo Random Number Generators *ARE* a crypto system".
I'm typing this from the new Windows Vista Beta 2 and I am impressed so far. However, I figured it was just a given that Microsoft would have sorted out the variable display dpi issues which I've had with Windows XP in the past. I thought this would be easily fixed by Microsoft in Vista because Vista uses your video cards 3D features for rendering the desktop. Right?
So I set the display dpi to that of my spectacular Sony 17" notebook's widescreen of 1920x1200 at 133dpi. I allowed the machine to reboot as required and then got ready to see a gorgeous desktop... well no... just like Windows XP, the text is lovely, but most of the icons have seemingly now scaled up from their original size, to some very very ugly aliased bitmaps.
Also, this dpi change did not apply to all aspects of the system. For example, IE7 font sizes did not change, nor did the bitmap (little icons, etc) sizes within IE7.
What's the story? Am I missing something here or do Microsoft still not understand how to design a GUI from the fundamentals all the way up to the user?
OSX scales bitmaps in style, but I have not needed to change the dpi drastically, so I can't comment on that aspect of OSX (can that even be done?). I guess this is due to Apple going back to the beginning and doing things right from the ground up.
Does anyone know if this can be fixed with proper configuration or if this is an issue that MS will be addressing? Am I doing something wrong?
PS, I'm not a Mac zealot. Truth be told, I spend most of my time in xterms under OpenBSD/fvwm. For me in my particular line of work, Windows is a necessary evil, so I would at least like to make the most of it.
Which is why my Vista download from Microsoft was a massive 5k per second until it timed out. I finally found a torrent and its clipping along a 60k per second. Not the fastest torrent but I expect it will pick up.
I'm downloading from Australia on my 1536/256 ADSL and the transfer is pegged at about 160.5k bytes/sec.
I think that is testament to the download being courtesy of the almighty akamai. That plus this...
Non-authoritative answer: download.windowsvista.com canonical name = download.windowsvista.com.edgesuite.net. download.windowsvista.com.edgesuite.net canonical name = a1391.ms.akamai.net. Name: a1391.ms.akamai.net Address: 210.15.241.16 Name: a1391.ms.akamai.net Address: 210.15.241.9
Those IP addresses for "download.windowsvista.com" are hosted within the ISP I use. Otherwise they'd at least be closer to me than Redmond. Thank you akamai and thank you Netspace! I'm betting this won't go towards my download quota.
avoid detection or suspicion by staying close to commercial airliner flight paths
An airliner might typically fly at around 900km/h, but will this glider be able to match an airline signature? Speed, return signature alluding to size and transponders will be required to look like an airliner. Also, the spec-ops guy might get sucked into the engine of one of those airliners or actually be eye-balled by airline pilots.
I think the spec-ops guys should be dropped from space, in something that looks like a big rock. That way everyone will think it was a metorite. Or even better, tunnel through the entire Earth and all that liquid hot mag-ma to your enemy.
Slashdot Mirror
You have to wonder who's smarter. The average consumer who buys a generic card at the cheapest price (found with a lot of research) or the nerd who buys a ultra high end branded card(found with a lot of research) at the highest possible price.
The expensive high performance cards are also the ones with the 1 million erase cycles, versus the 10,000 erase cycles of the cheap CF.
So who is smarter? The person who saved 25%-75% or the person who bought the card which will last 100 times longer?
Hate to break it to you, but DSLR's can't take full motion movies. Second of all, why are you downloading images tethered? Get a usb 2.0 card reader!
He said he got a firewire reader. BTW, I've never seen 480M/s USB2 outperform 400M/s firewire. All my firewire gear is WAY faster than my USB2 gear, including the devices which include both.
Why does everybody test performance, but nobody tests durability? What good is a ginormous flash card that stores your images in a fraction of a second when it trashes the FAT after some 10000 writes because the flash cells can't take anymore writes. There go the once in a lifetime shots.
From what I have read, the fast cards are also the most durable. They tend to be made of the single layer CF. It's the really large but slower multi-layer CF which don't last long.
Even running an engine with no oil in it to lubricate the moving parts and reduce friction will not break metal, it will simply reduce the power and efficiency of the engine.
Run a typical combustion engine with NO lubrication and you will get increased friction and thus increased heat and thus eventually a seized engine which might even include pistons which have welded themselves into the cylinder.
Metal does not wear out or break, at least not in our lifetimes.
What the hell are you talking about? I've worked in gear systems with Navy equipment and printers and it was quite common to see metal to metal gears wearing each other out. I often saw metal-plastic-metal gears because it actually increased the life of low-torque gear-boxes and even then only the plastic gears needed replacing. This was done because metal does wear out against metal.
Most of the specs define physical and electrical characteristics, the speed and performance is somewhat abstracted, the device will tell you when it's done, or when it want more data, and can do so in it's own sweet time.
Interface specs usually do define signal rates and word size (for parrallel). So specs usually do define a top speed. Certainly in the case of CF.
(Of course serial interfaces also define word sizes and sometimes allow for various sizes, however that typically does not change the bits/second rate by much, if at all, depending on the spec.)
You'd think cards developed to the same spec would have equal performance. Is that really not the case with SD or others? Interesting article.
I don't know about SD cards, but CF cards are compatible as IDE devices, which itself has various specs with varying performance. Various PIO and DMA modes, etc. This would be like comparing hard drives and then saying, "You'd think drives developed to the same spec would have equal performance".
Some cards are built using high density, low speed, low durability CF, while others go for lower density, high speed, high durability CF and multiples of them in one card. Some newer fast cards employ DMA modes over PIO. Also don't forget, the spec itself is not always the bottleneck, so individual models can vary in performance up to the limit of the particular spec used.
Also, I'm skeptical that you'll be getting 250 miles at 70 mph. If I remember right, electric motor efficiency and power typically increase with load, but fall off with speed, which makes them awesome for say, a 0-60 run in 3 seconds, but marginal at best for high speed cruising.
The major loads involved here are due to weight and drag. Weight mostly hurts acceleration and drag mostly hurts top speed. To double your top speed, you must quadruple your power. That should be a clear indication that there is plenty of load near the top speed of a vehicle.
Like, don't warn us that the linked story tries to run ActiveX controls that "improve" my computer.
I was not able to improve my Mac by going to that site. Damn you Apple!
Uh, you know the Mario character debuted in Donkey Kong, right? And again in DK Jr. And then yet again in Mario Brothers (the one with the crabs in tunnels and stuff). All of this way before before Super Mario Bros., let alone SMB2.
So the Mario character debuted how many times? ; )
You could have 99 banks of 69 batteries in series, presumably giving you something like 345 volts. That sounds about right for a DC motor.
It's an AC motor.
They have a policy not to publicly disclose this info. This policy was set up for propriatary/closed source vendors. They just continued to follow that policy when dealing with an open source vendor. OpenSSL/OpenBSD will most likely tell the public this info at some point, but it still may be something they want to fix before publishing -- a practice which is common in both open and closed source products/projects.
Why would the OpenBSD project make public announcements on behalf of the seperate OpenSSL project? The OpenSSL project cannot speak for themselves?
The Dish is the lighthearted 'adapted' history of the Parkes observatories role in the tracking and transmission of the first lunar landings. Quite funny if you get Australian humour.
I loved the bit when they are greeting the US President in Parkes and they have a band play the USA national anthem.... out comes..... the Hawaii Five-O theme!
As an Aussie, I don't particularly like typical Aussie movies. I think it is because I feel we exaggerate our own mannerisms in a way which almost validates the exaggeration and very poor interpretation from other nationals making movies about us. At least we get the accent right. We do NOT sound like a cross between New Zealand and South Africa!
However I really like The Dish.
Very easily. They can have all the best recordkeeping procedures in the world, and still lose anything through poor recordkeeping practices despite procedure.
Someone obviously did not properly fill out form: ZT082-7465-826/AYG-46-B_1.03
We don't even need to build the set. Just build a green room and let George Lucas do the rest!
I much prefer the original. Please don't let him anywhere near it.
At the time we started working this particular arrangement, more than a year ago, BitTorrent simply wasn't a workable option. I've not revisited it since then, but it's time to at least take another look.
Wonderful. Thanks for being open to the idea Brian.
BTW, I hope for a safe return for Discovery and the crew. And thank you all for your awesome work.
Shane
The other booster fell away below the field of view of this camera. The fuzzy object at 3:03-3:05 is lens flare, not a physical object.
So many times I have seen what is obviously lens flare, get pointed at by conspiracy nuts. A really funny one I saw, involved "UFO's" flying over the white house. These three "UFO's" were in a formation of a triangle from the cameras perspective. The triange of "UFO's" were arranged so that there were two above and at the same "altitude" and one below those.
Looking further down in the image, can clearly be seen three bright street lights forming a brighter mirror image of that triangle of "UFO's", where the middle point between the lights and the "UFO's" was also the middle point of the photograph. ; )
I saw this in a "revealing" documentary on UFO's, yet the FACT that the "lights in the sky" are just an unwanted optical effect within the lens of the camera taking the photo, was not revealed.
Hello Brian,
Thank you for replying.
"We've gotten a lot of e-mail like this, so I thought it was worth addressing in a forum where folks who take a real interest in the technology spend time. We stream video clips, rather than making them available for downloading, to manage our bandwidth usage."
Would NASA be willing to make torrents available, to get the benefits of BitTorrent? The enthusiasts who want the high quality stuff, would be distributing the load amongst themselves while the videos are at their most popular. After that, the worst case would be the trickling of downloads from your servers once the crowd has dispersed.
I'm an Apple Mac OSX user (PPC) and I would really like to see the videos. Hi-res would be nice too.
Thank you,
Shane
I was hoping that the website would explain this. Did you RTFM? Assuming you did not. The advantage that still exists is that OTP, even over SMS is much harder to intercept than standing behind someone at an airport kioske or sniffing wireless networks...
This is hilarious. My idea of TFM is this. Your system does not provide the advantage of the One Time Pad. Which of course is encryption and perfect encryption at that. The advantage you seem to be summing this up with, is that the passwords are used only once. So that is a One Time Password system and nothing like a One Time Pad.
You could actually get the benefits of the One Time Pad to provide single use passwords, but not the way you want to do it. You could have a list of strong passwords on the target login server. You will need an OTP for each user on the server and you will also need to distribute the appropriate One Time Pads to each individual user. When a user wishes to log in, they enter their username and then a "challenge" is provided, which is really the password they have just been one-time allocated for that session, encrypted against that users next free One Time Pad block. The user decrypts the password from his One Time Pad and then logs in. At this point, that used One Time Pad block is erased from the users machine, the server and the one-time password is also erased.
Obviously there are major impracticalities to this and thus the general use of One Time Pads.
The first and worst, is that you need to generate non-algorithmically lots of decent One Time Pads on an on-going basis and then somehow distribute them to your users in a secure channel. If you had access to such a secure channel between you and your users at arbitrary times, you would not need the impractical One Time Pad.
Second, your users need to somehow securely store thier current One Time Pad and it needs to be capable of being securely erased really fast. Is this going to be done with more practical algorithmic crypto? If so, the perfect strength of the One Time Pad may be gone.
Third big problem is that you can't store password hashes on the server, instead of the passwords themselves, for the simple reason that sending a user a one-way hash of a password is not going to give them access.
There are lots of one time password systems. Why we should choose your system and how does it provides the benefits of the One Time Pad?
A PRNG is most definitely a viable cryptosystem, if it is strong enough.
PRNG's are not crypto. PRNG+password_as_seed+XOR on the other hand, can be. With the strength being limited to the PRNG and password.
I'm sure you know this, I am just setting the story straight because people are bound to misinterpret what you said as literally meaning "Pseudo Random Number Generators *ARE* a crypto system".
It's 172 kB/s for audio, and 150 kB/s for data after substracting error correcting codes.
Okay. So that must mean that the error correction codes are all taken care of within the CD drive and they do not traverse the bus?
1x CD = 150K/s (which by no coindicence is the data rate for CD audio).
Which I've always thought was odd since:
* 44,100 samples per second per channel
* 2 bytes per sample (16bit audio)
* 2 channels
44,100 (samps/sec) x 2 (bytes per samp) x 2 (channels) = 176,400 bytes per second or about 172kb/s in the old meaning of kb/s.
I am downloading from work a day later, and I am getting 1073KB/sec ... it's only going to take me an hour to finish...
Show off! I'm fine with big downloads as long as they're finished when I wake up. ; )
For me, around 160 kbytes/sec is saturation for what bandwidth I have.
I'm typing this from the new Windows Vista Beta 2 and I am impressed so far. However, I figured it was just a given that Microsoft would have sorted out the variable display dpi issues which I've had with Windows XP in the past. I thought this would be easily fixed by Microsoft in Vista because Vista uses your video cards 3D features for rendering the desktop. Right?
So I set the display dpi to that of my spectacular Sony 17" notebook's widescreen of 1920x1200 at 133dpi. I allowed the machine to reboot as required and then got ready to see a gorgeous desktop... well no... just like Windows XP, the text is lovely, but most of the icons have seemingly now scaled up from their original size, to some very very ugly aliased bitmaps.
Also, this dpi change did not apply to all aspects of the system. For example, IE7 font sizes did not change, nor did the bitmap (little icons, etc) sizes within IE7.
What's the story? Am I missing something here or do Microsoft still not understand how to design a GUI from the fundamentals all the way up to the user?
OSX scales bitmaps in style, but I have not needed to change the dpi drastically, so I can't comment on that aspect of OSX (can that even be done?). I guess this is due to Apple going back to the beginning and doing things right from the ground up.
Does anyone know if this can be fixed with proper configuration or if this is an issue that MS will be addressing? Am I doing something wrong?
PS, I'm not a Mac zealot. Truth be told, I spend most of my time in xterms under OpenBSD/fvwm. For me in my particular line of work, Windows is a necessary evil, so I would at least like to make the most of it.
I'm downloading from Australia on my 1536/256 ADSL and the transfer is pegged at about 160.5k bytes/sec.
I think that is testament to the download being courtesy of the almighty akamai. That plus this...
Those IP addresses for "download.windowsvista.com" are hosted within the ISP I use. Otherwise they'd at least be closer to me than Redmond. Thank you akamai and thank you Netspace! I'm betting this won't go towards my download quota.
avoid detection or suspicion by staying close to commercial airliner flight paths
An airliner might typically fly at around 900km/h, but will this glider be able to match an airline signature? Speed, return signature alluding to size and transponders will be required to look like an airliner. Also, the spec-ops guy might get sucked into the engine of one of those airliners or actually be eye-balled by airline pilots.
I think the spec-ops guys should be dropped from space, in something that looks like a big rock. That way everyone will think it was a metorite. Or even better, tunnel through the entire Earth and all that liquid hot mag-ma to your enemy.