First, there is no "moment of detonation", powder doesn't detonate*, it burns quickly, producing gas. It's a lot of gas in a small space, so it's under pressure and that pressure pushes the bullet out. The powder continues to burn as the bullet moves down the barrel and even -after- the bullet leaves the barrel, producing muzzle flash. In pictures you may have seen the "fire" coming out of the muzzle. That fire is burning powder, meaning it's still burning after the bullet is gone.
The smokeless powder has usually finished burning by the time the gasses are exposed to the atmosphere. Their products however are oxygen poor and if hot enough, will combine with atmospheric oxygen to produce a flash rather than just a glow.
If the burn rate of the smokeless powder is low which is do to low pressure, then you can get flaming bits of powder but they usually go out leaving bits of unburnt powder.
Inductance is not a limitation because the number of turns in the stator can be reduced if necessary however magnetic saturation of the ferromagnetic projectile limits flux density so at some point, increasing the current does not result in an increase in force which limits acceleration.
Curiously, getting this right should be the one thing pro and anti nuclear folk should be able to agree on, if only for their own reasons. For Nuclear power to continue operating such a storage facility is essential so that new reactors can be deployed and materials removed from reactor sites. For people against Nuclear power such a facility would improve the safety of the industry as a whole by providing a place to store the materials permanently where there ingress into the environment can be controlled.
If the anti-nuclear folk can prevent safe storage, then it makes nuclear power more dangerous. In the same way they push low capacity factor "green" power which makes high capacity factor nuclear power more expensive.
The real problems with aluminum electrolytics started with the race-to-the-bottom PC clone market that came later.
Capacitor quality has not gotten worse. What changed is that the ripple current requirements are much higher with switching power supplies and the capacitors are selected for ESR to minimize switching ripple instead of capacitance to achieve a minimum holdup time between power line cycles. In the later case, the capacitor's ripple current rating will not be the limitation but in the former case with high power switching regulator, it is the limiting factor and an often under appreciated one.
To put it another way, you cannot cheap out on capacitors used to holdup the 50/60 Hz line cycle because they require a minimum value of capacitance at which point all other factors are irrelevant but it is very easy to do so with switching regulator output capacitors.
In the end, it turns out the health of the children won out especially since the flame retardants, while they worked, didn't really do all that much in the grand scheme of things. Because when the room's on fire anyways...
The flame retardants also make the combustion products significantly more dangerous then the natural fibers or even some plastics alone.
By the looks of the device, it has a 2.4GHz yagi antenna, which would mean that it simply saturates the device with a 2.4GHz signal. What about drones flying spread spectrum 480MHz, or even 5.8GHz? And that antenna won't cover the GPS frequencies, either.
I see two antennas there and the lower one looks like a log-periodic antenna to perhaps cover the two lower ISM bands and GPS. I assume then that the upper antenna is for 5 GHz.
I'm going to be the rational minority in what will likely be a long, bloody thread, but I think this is a good move by the government. There were a few incidents, some in near my local airport where a drone came within the vicinity of operating aircraft. It sucks that a few bad apples ruined what would have been an enjoyable hobby, but it has to be regulated.
I agree it's a good move, but it's not really about a danger to aviation so much as about terrorism. Drones are almost as good as self-driving cars would be at allowing suicide bombers to blow things up without the need for suicide. Small payload, but can still be turned into a flying death machine, and very common. If you require registration, not only do you have a better chance at tracking the owner of a drone, but you can do more to run the owners through watch lists and add drone ownership as another weight in an equation or neural net that is trying to spot people the government needs to worry about.
Criminals and terrorists will certainly think twice about violating a registration law.
Unless this is registration in the form of the National Firearms Act of 1934 requiring registration of drones and GCA of 1986 banning the manufacturing of new drones for civilians and preventing the registration of old drones, how would just registration alone help?
OpenWRT (the REAL deal, not the hacked up dog and pony show that netgear and pals puts under the hood of their devices) boots in a fraction of the time (Stock firmwares often take over a full 2 minutes to fully finish the init script!! Open WRT becomes fully functional in typically under 30 seconds.)
Even sadder, my ancient Celeron 300A running m0n0wall from a compact Flash card boots to a fully operating condition in less than 30 seconds and that is without fast booting enabled which leaves out some of the tests like memory. It helps of course that there is nothing significant connected to the PC for the BIOS to enumerate.
When selecting an ocilioscope, searching for minimum requirements often reveals additional features that used to cost lots of dollars for the propritory value added software. I am done with batteries not included features. Only products with fully functioning features are ever considered. Been down that road before. Bought a scope with a communications module. The software to simply transfer the screen shot to the PC was bundled in a mathlab type application for 1/2 the price of the scope as an option. That is a super fast way to loose sales. If a scope has a communications module, it should work without additonal purchase for basic functions such as a screen capture.
Well said. And I would add that normally advertisers hide the specifications because they want you to buy crap for the price of decent or the only thing they have to sell is junk. As in a normal situation no one would buy the garbage they produce then they have to disguise that fact with propaganda and lack of information.
It is even worse when they outright lie.
I was hunting for a new digital storage oscilloscope not long ago and ran across "low noise front end" in marketing literature. That sounds useful since noise is often a limiting factor but I wondered how they could do that since it would break the laws of physics. Testing revealed that they achieved low noise by generating a false trace when the input coupling was set to ground. Set it to AC or DC and short the input or set the coupling to 50 ohms and the noise was right where it should be for a 1 megohm 20 picofarad input given the bandwidth. It was *no* improvement on the 30 year old oscilloscope I was looking to replace. My old Tektronix DSO does processing to reduce noise during peak detection but at least it documents it and even allows it to be disabled.
Then they leave out specifications like overload recovery and aberrations which probably makes sense since the performance of modern DSOs has gotten worse in these respects. All of the free fancy measurement functions are useless when the oscilloscope cannot even acquire the waveform without error.
Oh wow, you found 8 examples in the last 17 years of it happening and nearly all of them have "it's unclear if he would have killed more people if they'd not shot him".
If a civilian stops a mass shooting using a firearm then it is not a mass shooting and if a citizen does not, then they failed to stop a mass shooting. So there is no way that a civilian can ever stop a mass shooting.
hose "signs" that are being debated here have nothing to do with stopping school shootings of the kind being discussed here. The ban on guns in schools comes from "The Gun Free Schools Act" a law first passed way back in 1990. The idea was not that signs would stop people determined to come in and shoot up a school. That was barely even a concept at the time. The idea was that if merely having a gun on you near a school would carry a harsher penalty than elsewhere it would drive gang and drug activity away from schools.
Another benefit is that the law makes it unlawful for a someone *not* specifically licensed by the state they are in to carry a firearm concealed or not which prevents legal state to state reciprocity of concealed carry licenses and prevents states from having legal concealed or open carry without a license.
The weak part is the documentation and firmware for the wireless chipsets. Support for new features is poor. For pfsense and m0n0wall which run on FreeBSD the general recommendation is still to use an external access point connected via ethernet.
Of course the defence is going to do their darndest to monkeywrench the prosecution, and threatening the tool builder with disclosure of his trade secrets is a good move tactically. It's up to the judge (and possibly the appeals judge) to call them on it if it's just an irrelevant thrash.
As if the prosecution did not pick or encourage a testing method which would prevent cross examination.
Man-Man sex and Abortion (and meaningful gun control) are all settled issues barring a constitutional amendment, so I urge anyone not to vote on the basis of these issues, because they aren't changing anytime soon.
Heller was a 5 to 4 decision so your meaningful gun control is just one justice away.
I looked into this when the LPC1114FN28 came out and they do draw more power than the 8/16/32 bit microcontrollers that they seek to replace. Part of this is do to a fabrication process which supports higher frequency operation but the addition of things like a PLL and separate clock domains for peripherals which adds extra complexity (and bugs at least in the case of NXP) not required on a slower microcontroller has a cost here as well. Another power saving feature which is missing in general on ARM is support for dual external clock sources which include a 32kHz crystal source.
The extra cost of ARM in general, 2 to 4 times, for performance if it is not needed does not help.
The big advantage of ARM is not having to deal with more than one instruction set and programming environment if you need to use a separate microcontroller for I/O expansion. The problem with this is that there is a dearth of available ARM microcontrollers suitable for this task when replacing 8 bit microcontrollers. The price/performance ratio just is not there.
I wonder how well securing luggage with a firearm actually helps though.
They did not change the rule regarding putting the "steal me" firearm tag on the inside of the luggage without reason and the same penalties applied back then. I assume the smart thieves broke the luggage open after seeing the tag, stole the firearm, and put the luggage back. Certainly that happens with high value personal items now, so why would this be different from firearms except for the penalties? This would apply to handguns but not long guns though.
Offhand I do not know of any incidents where packing a firearm for extra security created a more thorough response when the luggage was reported stolen but my sample size is low. I would still do it if possible.
The ROM's on early-80's consoles are still, on the whole, perfectly readable (as evidenced by MAME), and they don't even TRY to use error correcting codes to ensure resiliency.
Not if they are Mostek mask ROMs with the 2763 pinout. In test equipment and arcade machine those all seem to be failing. Anti-fuse programmable logic from that era is also failing. The fuses seem to be "regrowing".
Let's take this a step further - Apple added MAC address randomization [appleinsider.com] to ios 8. Android can't be far behind, so what, exactly, is this going to do other than result in more home invasions on known false pretenses?
Slashdot Mirror
The smokeless powder has usually finished burning by the time the gasses are exposed to the atmosphere. Their products however are oxygen poor and if hot enough, will combine with atmospheric oxygen to produce a flash rather than just a glow.
If the burn rate of the smokeless powder is low which is do to low pressure, then you can get flaming bits of powder but they usually go out leaving bits of unburnt powder.
Inductance is not a limitation because the number of turns in the stator can be reduced if necessary however magnetic saturation of the ferromagnetic projectile limits flux density so at some point, increasing the current does not result in an increase in force which limits acceleration.
If the anti-nuclear folk can prevent safe storage, then it makes nuclear power more dangerous. In the same way they push low capacity factor "green" power which makes high capacity factor nuclear power more expensive.
Capacitor quality has not gotten worse. What changed is that the ripple current requirements are much higher with switching power supplies and the capacitors are selected for ESR to minimize switching ripple instead of capacitance to achieve a minimum holdup time between power line cycles. In the later case, the capacitor's ripple current rating will not be the limitation but in the former case with high power switching regulator, it is the limiting factor and an often under appreciated one.
To put it another way, you cannot cheap out on capacitors used to holdup the 50/60 Hz line cycle because they require a minimum value of capacitance at which point all other factors are irrelevant but it is very easy to do so with switching regulator output capacitors.
The flame retardants also make the combustion products significantly more dangerous then the natural fibers or even some plastics alone.
I see two antennas there and the lower one looks like a log-periodic antenna to perhaps cover the two lower ISM bands and GPS. I assume then that the upper antenna is for 5 GHz.
No they have not. Many states have mandatory gun registration and the Feds do for specific classes of firearms.
Even laws which tax firearms at confiscatory rates are not been ruled unconstitutional.
Just make it unlawful to remove the serial number or registration mark like they do with firearms - problem solved.
Criminals and terrorists will certainly think twice about violating a registration law.
Unless this is registration in the form of the National Firearms Act of 1934 requiring registration of drones and GCA of 1986 banning the manufacturing of new drones for civilians and preventing the registration of old drones, how would just registration alone help?
AT&T U-Verse does now although they used to let you buy the modem from them outright. That is no longer possible.
Even sadder, my ancient Celeron 300A running m0n0wall from a compact Flash card boots to a fully operating condition in less than 30 seconds and that is without fast booting enabled which leaves out some of the tests like memory. It helps of course that there is nothing significant connected to the PC for the BIOS to enumerate.
It is even worse when they outright lie.
I was hunting for a new digital storage oscilloscope not long ago and ran across "low noise front end" in marketing literature. That sounds useful since noise is often a limiting factor but I wondered how they could do that since it would break the laws of physics. Testing revealed that they achieved low noise by generating a false trace when the input coupling was set to ground. Set it to AC or DC and short the input or set the coupling to 50 ohms and the noise was right where it should be for a 1 megohm 20 picofarad input given the bandwidth. It was *no* improvement on the 30 year old oscilloscope I was looking to replace. My old Tektronix DSO does processing to reduce noise during peak detection but at least it documents it and even allows it to be disabled.
Then they leave out specifications like overload recovery and aberrations which probably makes sense since the performance of modern DSOs has gotten worse in these respects. All of the free fancy measurement functions are useless when the oscilloscope cannot even acquire the waveform without error.
Get off my lawn! *shakes fist*
To borrow a phrase from Niven's "How the Heroes Die":
The sandstorm was at the height of its fury, which made it about as dangerous as an enraged caterpillar.
http://www.e-reading.club/book...
If a civilian stops a mass shooting using a firearm then it is not a mass shooting and if a citizen does not, then they failed to stop a mass shooting. So there is no way that a civilian can ever stop a mass shooting.
Another benefit is that the law makes it unlawful for a someone *not* specifically licensed by the state they are in to carry a firearm concealed or not which prevents legal state to state reciprocity of concealed carry licenses and prevents states from having legal concealed or open carry without a license.
http://www.handgunlaw.us/docum...
The weak part is the documentation and firmware for the wireless chipsets. Support for new features is poor. For pfsense and m0n0wall which run on FreeBSD the general recommendation is still to use an external access point connected via ethernet.
As if the prosecution did not pick or encourage a testing method which would prevent cross examination.
Heller was a 5 to 4 decision so your meaningful gun control is just one justice away.
I looked into this when the LPC1114FN28 came out and they do draw more power than the 8/16/32 bit microcontrollers that they seek to replace. Part of this is do to a fabrication process which supports higher frequency operation but the addition of things like a PLL and separate clock domains for peripherals which adds extra complexity (and bugs at least in the case of NXP) not required on a slower microcontroller has a cost here as well. Another power saving feature which is missing in general on ARM is support for dual external clock sources which include a 32kHz crystal source.
The extra cost of ARM in general, 2 to 4 times, for performance if it is not needed does not help.
The big advantage of ARM is not having to deal with more than one instruction set and programming environment if you need to use a separate microcontroller for I/O expansion. The problem with this is that there is a dearth of available ARM microcontrollers suitable for this task when replacing 8 bit microcontrollers. The price/performance ratio just is not there.
I wonder how well securing luggage with a firearm actually helps though.
They did not change the rule regarding putting the "steal me" firearm tag on the inside of the luggage without reason and the same penalties applied back then. I assume the smart thieves broke the luggage open after seeing the tag, stole the firearm, and put the luggage back. Certainly that happens with high value personal items now, so why would this be different from firearms except for the penalties? This would apply to handguns but not long guns though.
Offhand I do not know of any incidents where packing a firearm for extra security created a more thorough response when the luggage was reported stolen but my sample size is low. I would still do it if possible.
It sure was recently when that license plate reader made a mistake and the cops detained the driver at gun point.
For test equipment the solution is to either copy the ROM into a pin compatible EPROM or convert the pinout to 2764 and use a modern EPROM.
Not if they are Mostek mask ROMs with the 2763 pinout. In test equipment and arcade machine those all seem to be failing. Anti-fuse programmable logic from that era is also failing. The fuses seem to be "regrowing".
I fail to see a downside for law enforcement.