The HSC Manannan's high speed is less a factor of hull design and more a factor of MASSIVE power. By rough calculations, the HSC has 6.8 hp/ton, while the USS Ronald Reagan has about 2.6 hp/ton. Hull speed is not a hard limit- it is just an arbitrary point on the curve where naval architects say it isn't worth it to add additional power to go faster.
Carriers are fast because the top speed of a ship with a displacement hull is most strongly a factor of length at the waterline. Carriers are long-> carriers are fast.
Using a mini-B connector was a poor choice. The Mini-B was not designed for many plug-unplug cycles, Micro-B is designed for many more cycles, in addition, the portion that wears is the plug-end, not the soldered down jack.
Microchip uses the MIPS 4K core in PIC32. I am not aware of any other microcontroller vendor that use MIPS in a released product. MIPS cores are all over the place. Since the majority (plurality?) of embedded programming is in C anyway, how much does the core really matter? In the microcontroller world, everything revolves around power and peripherals.
Your argument is a red herring. While it may not solve the issue, it may make piracy less attractive. Unfortunately, people pirate for many reasons, including they can make money from it. Wouldn't it be awesome if some of the creativity involved in piracy got redirected into new endeavors? I'm realistic- I know it won't make the piracy problem (which includes poor monetization models on the part of the current content creators) go away, but I see how this could help.
As was pointed out here this was not a military drone. Until they can spoof p(y) code, this is nothing. For just this reason, all military equipment is required to use an encrypted signal (of course, this was as of 10 years ago, when I was still working with military GPS systems)- civilian GPS can be pretty easily jammed and/or spoofed- "civilian" GPS is also called "C/A" or coarse acquisition- which was designed only to get you "about right" before the receiver switches over to the more precise encrypted code. Anti-spoofing is a very important part of true military grade GPS. Many civilian users (surveying companies, particularly) would pay *big* money to get access to this- but they don't get the keys.
I think this article should be more accurately titled "Texas college hacks insecurely designed civilian drone"
There is a lot of hand-waving in there- yes, a lot of people pay no federal *INCOME* taxes, many of them do actually pay payroll taxes. According to Politifact, once you exclude the elderly and those that make less than $20,000 per year, 0.9% pay no federal Income tax or payroll tax. (Tax year 2011)
MikroElectronika has some for various microcontrollers- they don't have packaging, but the whole thing is pretty self contained. The link above is for Microchip PIC32, but there are a bunch of other microcontroller boards available from them.
Dell has been supporting Linux on servers for well over 10 years. You've always been free to install Linux on your laptop- just don't expect to get (consumer level/any) support.
The hardware cost is just a fraction of what you pay. In a previous life, when I worked at a little company in Round Rock, TX that rhymes with hell, testing took up the vast majority of development effort, and every additional OS added to that test effort/cost. If/when the analysis says it can make a profit that is similar to the other lines of business, that path is taken.
What really makes the Beagle useful is the software- allowing to collect data, filter on certain packets, statistics, and timing. Just looking at high/low traces is useful, but, particularly when dealing with serial protocols, can get old, really quickly.
What I would really like would be some way to use the Wireshark interface with these tools looking for these protocols. Maybe there is a way, but I haven't figured out the proper hardware/software combination.
Until I2C is 100% released, this is not complete- that's my minimum benchmark. I've got a Saleae 8 channel and it looks like it supports it- but the last thing you want to be doing when you're working on a project like this is debugging your test hardware.
I like the portability and flexibility of the Saleae device, but if I'm getting deep into the protocol... the Beagle from Total Phase works much better. Total phase also has a decently affordable USB analyzer. What I've found is that a simple analyzer works fine for basic debugging, but once you start getting into complex debugging or real-time, the software layer that resides on the PC is what really differentiates what is a "real tool."
Collecting data is one thing, but sorting through it is where the skill is involved, and decent software becomes vital.
Watt is a unit of power, energy is the integral of power over time. A common unit for energy is the Joule.
Measuring power is a complex task (both the mathematical and figurative use of complex).
I don't think there has been a new car with carbs in the US market (American Marque or not) in at least 20 years- excluding limited production cars, at least. Meeting new car emissions requirements with carbs is virtually impossible.
Most open source makes it clear "no guarantee" "you are responsible" etc. When you're fiddling around with your computer, not a problem, you are pretty limited in the scope what you can really mess up (and your ISP has a pretty easy switch to cut you off). But, when we start looking at cars- most places have liability insurance requirements, because when things go bad, they can really go bad- far faster than most people have cash reserves to cover (in the case of someone else's injuries). How do we extend this to cars? It must be in place to some extent, since people have been modifying cars since there were cars.
Aren't there also some serious regulatory hurdles, particularly when it comes to devices that are intentional RF radiators? There are (1) limits imposed by the regulatory bodies (not more than x uV/m signal strength over frequency band y) but also (2) prevent of the guy who just wants his signal to get through (and damn you all) and cranks up the TX power beyond what the equipment is rated for, making adjacent bands useless for anything else. I see some of the restrictions on these things from that light, and I don't know a good answer, particularly to (2).
Austin is proud of its local businesses- 'Keep Austin Weird" is an advertising slogan of the Austin Business Alliance- Surely, he could have supported one of our local entrepreneurs and looked for a local source.
Slashdot Mirror
The HSC Manannan's high speed is less a factor of hull design and more a factor of MASSIVE power. By rough calculations, the HSC has 6.8 hp/ton, while the USS Ronald Reagan has about 2.6 hp/ton. Hull speed is not a hard limit- it is just an arbitrary point on the curve where naval architects say it isn't worth it to add additional power to go faster.
Carriers are fast because the top speed of a ship with a displacement hull is most strongly a factor of length at the waterline. Carriers are long-> carriers are fast.
Report of the task force on circumcision
Male circumcision for HIV prevention in men in Rakai, Uganda: a randomised trial
Just the first 2 links from scholar.google.com
While some may equate the two, my view is not that he is evil- he is greedy.
Using a mini-B connector was a poor choice. The Mini-B was not designed for many plug-unplug cycles, Micro-B is designed for many more cycles, in addition, the portion that wears is the plug-end, not the soldered down jack.
Microchip uses the MIPS 4K core in PIC32. I am not aware of any other microcontroller vendor that use MIPS in a released product. MIPS cores are all over the place. Since the majority (plurality?) of embedded programming is in C anyway, how much does the core really matter? In the microcontroller world, everything revolves around power and peripherals.
Does your system record data so that the position data can be enhanced with Post Processing?
Your argument is a red herring. While it may not solve the issue, it may make piracy less attractive. Unfortunately, people pirate for many reasons, including they can make money from it. Wouldn't it be awesome if some of the creativity involved in piracy got redirected into new endeavors? I'm realistic- I know it won't make the piracy problem (which includes poor monetization models on the part of the current content creators) go away, but I see how this could help.
As was pointed out here this was not a military drone. Until they can spoof p(y) code, this is nothing. For just this reason, all military equipment is required to use an encrypted signal (of course, this was as of 10 years ago, when I was still working with military GPS systems)- civilian GPS can be pretty easily jammed and/or spoofed- "civilian" GPS is also called "C/A" or coarse acquisition- which was designed only to get you "about right" before the receiver switches over to the more precise encrypted code. Anti-spoofing is a very important part of true military grade GPS. Many civilian users (surveying companies, particularly) would pay *big* money to get access to this- but they don't get the keys.
I think this article should be more accurately titled "Texas college hacks insecurely designed civilian drone"
There is a lot of hand-waving in there- yes, a lot of people pay no federal *INCOME* taxes, many of them do actually pay payroll taxes. According to Politifact, once you exclude the elderly and those that make less than $20,000 per year, 0.9% pay no federal Income tax or payroll tax. (Tax year 2011)
MikroElectronika has some for various microcontrollers- they don't have packaging, but the whole thing is pretty self contained. The link above is for Microchip PIC32, but there are a bunch of other microcontroller boards available from them.
Dell has been supporting Linux on servers for well over 10 years. You've always been free to install Linux on your laptop- just don't expect to get (consumer level/any) support.
The hardware cost is just a fraction of what you pay. In a previous life, when I worked at a little company in Round Rock, TX that rhymes with hell, testing took up the vast majority of development effort, and every additional OS added to that test effort/cost. If/when the analysis says it can make a profit that is similar to the other lines of business, that path is taken.
What really makes the Beagle useful is the software- allowing to collect data, filter on certain packets, statistics, and timing. Just looking at high/low traces is useful, but, particularly when dealing with serial protocols, can get old, really quickly.
What I would really like would be some way to use the Wireshark interface with these tools looking for these protocols. Maybe there is a way, but I haven't figured out the proper hardware/software combination.
"Walking Dead" - you can never start the preparations and training early enough.
Until I2C is 100% released, this is not complete- that's my minimum benchmark. I've got a Saleae 8 channel and it looks like it supports it- but the last thing you want to be doing when you're working on a project like this is debugging your test hardware.
I like the portability and flexibility of the Saleae device, but if I'm getting deep into the protocol... the Beagle from Total Phase works much better. Total phase also has a decently affordable USB analyzer. What I've found is that a simple analyzer works fine for basic debugging, but once you start getting into complex debugging or real-time, the software layer that resides on the PC is what really differentiates what is a "real tool."
Collecting data is one thing, but sorting through it is where the skill is involved, and decent software becomes vital.
Watt is a unit of power, energy is the integral of power over time. A common unit for energy is the Joule. Measuring power is a complex task (both the mathematical and figurative use of complex).
I don't think there has been a new car with carbs in the US market (American Marque or not) in at least 20 years- excluding limited production cars, at least. Meeting new car emissions requirements with carbs is virtually impossible.
Most open source makes it clear "no guarantee" "you are responsible" etc. When you're fiddling around with your computer, not a problem, you are pretty limited in the scope what you can really mess up (and your ISP has a pretty easy switch to cut you off). But, when we start looking at cars- most places have liability insurance requirements, because when things go bad, they can really go bad- far faster than most people have cash reserves to cover (in the case of someone else's injuries). How do we extend this to cars? It must be in place to some extent, since people have been modifying cars since there were cars.
Print out the datasheet for a microcontroller and hand it to him. It might discourage him, but you could just be creating a prodigy.
You can't see it because it is pointing straight at you, no matter what direction you look.
Aren't there also some serious regulatory hurdles, particularly when it comes to devices that are intentional RF radiators? There are (1) limits imposed by the regulatory bodies (not more than x uV/m signal strength over frequency band y) but also (2) prevent of the guy who just wants his signal to get through (and damn you all) and cranks up the TX power beyond what the equipment is rated for, making adjacent bands useless for anything else. I see some of the restrictions on these things from that light, and I don't know a good answer, particularly to (2).
Nope. Can't do that. Common Sense is copyrighted.
I wouldn't have been surprised if Austin stole it. Many things come to Austin from other places and stay- smog, traffic, Californians...
: I meant Austin Independent Business Alliance.
Austin is proud of its local businesses- 'Keep Austin Weird" is an advertising slogan of the Austin Business Alliance- Surely, he could have supported one of our local entrepreneurs and looked for a local source.