Keep the damn phone off until the plane has stopped at the gate!
The pilot has to be able to communicate with the tower while taxiing the plane to the gate. There are plenty of opportunities for disastrous accidents, even on the ground. The tower could be telling the pilot to stop at his current position while another plane takes off or lands on an intersecting runway. What if the pilot never hears it because his radio is being jammed by some idiot's cell phone?
No. The receiver may have multiple local oscillators, operating at frequencies well outside of the frequency band the receiver is designed for. The emissions from the local oscillator may jam the satellite signal, which is very weak.
One of the reasons that the "no electronic device" rule was passed dates back over 40 years. The FM broadcast band (88-108 MHz) is adjacent to one of the bands used for aircraft communications and navigation (108-136 MHz). When people first brought portable FM radios on aircraft, they found out that local oscillator radiation from the radios could jam the aircraft's communication and navigation equipment.
They don't have to give the source code to everyone.
They also have to comply with U.S. export laws (International Traffic in Arms Regulations, 22 CFR 120-130) that require an export license for missile technology. That trumps the GPL.
You can get in serious trouble if you ignore the law.
You still have to worry about the radiation pattern of the antenna on the rocket and the aspect angle between the rocket and the tracking ystem on the ground.
I consider the ability to write and read cursive script a basic part of English literacy. Then again, I expect an educated person to be able to multiply small integers without the aid of a calculator.
I thought that the main problem with the survivability of the landers was the surface temperature of Venus. How much science can be accomplished before the lander's electronic components get fried.
Would it be possible to build a refrigeration unit that would keep the interior of the lander cool?
For VHF/UHF broadcast stations, the FCC (Federal Communications Commission), gives station owners two choices when it comes to carriage on local cable TV systems.
The first choice is "Must Carry", which means that the cable system must carry the station on their cable system. This is a popular choice with low-budget TV stations that carry the Home Shopping Network or other unattractive programs.
The second choice is "Retransmission Consent", which means that the cable system must negotiate a contract with the broadcast station if it wishes to carry the station on their cable system. This usually involves cash payments to the broadcast station or an agreement to carry additional cable channels owned by the broadcast station's owner. For example, a station on the Fox network may demand that the cable system also carry the Fox News Channel in addition to the broadcast station.
Small stations, that otherwise might not get carried by the cable system, pick "Must Carry".
Large stations, like affiliates of the major networks, pick "Retransmission Consent", in order to get cash or other valuable considerations from the cable system.
This puts the cable system operator in a bind. His customers expect to see all of the major local stations on the cable system. To do this, he has to negotiate contracts with all of those stations to get permission to carry them.
Even though the station may be "free" to people receiving it over-the-air, the cable system operator may be paying the station cash for the right to carry it on the cable system.
I've seen figures that say that 85% of American television households have DBS or cable. What those figures don't tell you is that in many of those DBS and cable households, there are additional TV sets that rely on over-the-air reception.
The European standard for digital television, DVB-T, is well suited for this broadcasting model. The American standard for digital television, ATSC, only works well with the "big stick" broadcasting model due to the modulation technique (8-VSB) that was selected for the standard.
Baltimore uses 2, 11 and 13. Washington uses 4, 5, 7 and 9. Channels 3, 6, 8, and 10 are adjacent to existing local stations. Channel 12 would cause interference to 11 and 13 in the area in between Baltimore and Washington. There are no "free" VHF channels in the Baltimore/Washington area. Even in the UHF band, there are not as many "free" channels as you might think, after taking interference between geographic regions into account and channels that are not allocated to protect low-cost television receivers from interference.
Cell phones (AMPS) were introduced before the explosion in area codes. Local calls were dialed with 7 digits in most places. You only needed to dial an area code if it was a toll (long distance) call. The existing mobile telephone service (non-cellular) used regular 7 digit phone numbers. It was much simpler to just allocate some new exchanges in the existing area codes for the new cellular services. Airtime charges for mobile phone service (pre-cellular, AMPS, TDMA/GSM/CDMA) have always been charged to the mobile subscriber, no matter who originated the call. This means that the wireline telephone companies do not have to modify their billing systems to handle calls to/from mobile telephone subscribers.
The FCC has a complicated set of rules that only allow certain channels to be used in a specific geographic area. Partially because of interference between adjacent markets and also because of the limitations of the receivers in consumer-grade television sets. This results in a great deal of wasted spectrum.
While the town may not be able to grant an exclusive cable license anymore, they can make life miserable for anyone who tries to build a second system. They can delay construction for years by dragging their feet on right-of-way and franchise agreements, forcing the new cable company to sue the town government.
Where I live, and in many other places, the incumbent cable company bribed government officials to get the cable franchise.
CRCs in Ethernet and other link transport mechanisms only protect the integrity of the data while it is "on the wire". They do not detect data corruption caused by flakey NICs, broken motherboards and defective main memory. UDP can be run with checksums disabled. This has caused much misery when used in conjunction with NFS.
Many scientists agree with the "moron-in-chief", as you termed him. Computer simulations provide the necessary assurance that the nuclear stockpile is safe and reliable today. There are serious questions about whether this is a adequate long-term solution. To have credible deterrence value, potential adversaries must believe that the weapons will work as advertised. Without data from physical experiments, computer simulations can be misleading or useless. The physical experiments are a necessary reality check. As the simulations become more complex and sophisticated, so does the uncertainty as to the accuracy of their results. At some point we may be forced to resume limited nuclear testing in order to check and validate the models used in the simulations.
Digital signal processing can suck up huge amounts of processing power. How would Joe Schmoe feel about a software defined radio or a software defined television in his PC? Today we have DVD players implemented in software. Someday we will have high-definition television receivers implemented in software.
This is the wrong band for this type of service. The 2.4 GHz ISM band is an RF garbage dump. Unlicensed users, such as WiFi, are at the bottom of the heap. Unlicensed users may not cause interference to licensed users and must accept any interference they get. In other words, if another spectrum user is wiping out WiFi coverage in a specific area, tough shit, you have to live with it. The fact that the vast majority of WiFi equipment is designed to be cheap instead of being designed to have good RF performance, just makes things worse. WiFi is not the magic cure for all ills that some would hype it as.
The security record of most operating systems is pathetic, including both the commercial and open source categories.
Even OpenBSD relies on auditing after the fact, not on designing with security in mind at the beginning.
Have we learned nothing since the introduction of Multics in 1965? Multics had a higher security evaluation than whatever POS is currently running on your desktop.
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The pilot has to be able to communicate with the tower while taxiing the plane to the gate. There are plenty of opportunities for disastrous accidents, even on the ground. The tower could be telling the pilot to stop at his current position while another plane takes off or lands on an intersecting runway. What if the pilot never hears it because his radio is being jammed by some idiot's cell phone?
One of the reasons that the "no electronic device" rule was passed dates back over 40 years. The FM broadcast band (88-108 MHz) is adjacent to one of the bands used for aircraft communications and navigation (108-136 MHz). When people first brought portable FM radios on aircraft, they found out that local oscillator radiation from the radios could jam the aircraft's communication and navigation equipment.
Many older rockets use hardwired systems for telemetry, command and control.
They also have to comply with U.S. export laws (International Traffic in Arms Regulations, 22 CFR 120-130) that require an export license for missile technology. That trumps the GPL. You can get in serious trouble if you ignore the law.
You still have to worry about the radiation pattern of the antenna on the rocket and the aspect angle between the rocket and the tracking ystem on the ground.
I consider the ability to write and read cursive script a basic part of English literacy. Then again, I expect an educated person to be able to multiply small integers without the aid of a calculator.
Safari (Apple Mac OS X browser) passes all of the tests.
Would it be possible to build a refrigeration unit that would keep the interior of the lander cool?
Are you sure that it isn't an inventory control (anti-shoplifting) tag? A RFID tag is going to need a silicon chip.
The first choice is "Must Carry", which means that the cable system must carry the station on their cable system. This is a popular choice with low-budget TV stations that carry the Home Shopping Network or other unattractive programs.
The second choice is "Retransmission Consent", which means that the cable system must negotiate a contract with the broadcast station if it wishes to carry the station on their cable system. This usually involves cash payments to the broadcast station or an agreement to carry additional cable channels owned by the broadcast station's owner. For example, a station on the Fox network may demand that the cable system also carry the Fox News Channel in addition to the broadcast station.
Small stations, that otherwise might not get carried by the cable system, pick "Must Carry".
Large stations, like affiliates of the major networks, pick "Retransmission Consent", in order to get cash or other valuable considerations from the cable system.
This puts the cable system operator in a bind. His customers expect to see all of the major local stations on the cable system. To do this, he has to negotiate contracts with all of those stations to get permission to carry them. Even though the station may be "free" to people receiving it over-the-air, the cable system operator may be paying the station cash for the right to carry it on the cable system.
Most magazines use the same economic model. The cover price of the magazine is subsidized by the advertising content.
I've seen figures that say that 85% of American television households have DBS or cable. What those figures don't tell you is that in many of those DBS and cable households, there are additional TV sets that rely on over-the-air reception.
The European standard for digital television, DVB-T, is well suited for this broadcasting model. The American standard for digital television, ATSC, only works well with the "big stick" broadcasting model due to the modulation technique (8-VSB) that was selected for the standard.
Baltimore uses 2, 11 and 13. Washington uses 4, 5, 7 and 9. Channels 3, 6, 8, and 10 are adjacent to existing local stations. Channel 12 would cause interference to 11 and 13 in the area in between Baltimore and Washington. There are no "free" VHF channels in the Baltimore/Washington area. Even in the UHF band, there are not as many "free" channels as you might think, after taking interference between geographic regions into account and channels that are not allocated to protect low-cost television receivers from interference.
Cell phones (AMPS) were introduced before the explosion in area codes. Local calls were dialed with 7 digits in most places. You only needed to dial an area code if it was a toll (long distance) call. The existing mobile telephone service (non-cellular) used regular 7 digit phone numbers. It was much simpler to just allocate some new exchanges in the existing area codes for the new cellular services. Airtime charges for mobile phone service (pre-cellular, AMPS, TDMA/GSM/CDMA) have always been charged to the mobile subscriber, no matter who originated the call. This means that the wireline telephone companies do not have to modify their billing systems to handle calls to/from mobile telephone subscribers.
470-512 MHz is already used for public safety communications (fire/police). It is shared with UHF television broadcasting.
The FCC has a complicated set of rules that only allow certain channels to be used in a specific geographic area. Partially because of interference between adjacent markets and also because of the limitations of the receivers in consumer-grade television sets. This results in a great deal of wasted spectrum.
Where I live, and in many other places, the incumbent cable company bribed government officials to get the cable franchise.
CRCs in Ethernet and other link transport mechanisms only protect the integrity of the data while it is "on the wire". They do not detect data corruption caused by flakey NICs, broken motherboards and defective main memory. UDP can be run with checksums disabled. This has caused much misery when used in conjunction with NFS.
I reach for the stars, but sometimes I hit London.
Many scientists agree with the "moron-in-chief", as you termed him. Computer simulations provide the necessary assurance that the nuclear stockpile is safe and reliable today. There are serious questions about whether this is a adequate long-term solution. To have credible deterrence value, potential adversaries must believe that the weapons will work as advertised. Without data from physical experiments, computer simulations can be misleading or useless. The physical experiments are a necessary reality check. As the simulations become more complex and sophisticated, so does the uncertainty as to the accuracy of their results. At some point we may be forced to resume limited nuclear testing in order to check and validate the models used in the simulations.
Digital signal processing can suck up huge amounts of processing power. How would Joe Schmoe feel about a software defined radio or a software defined television in his PC? Today we have DVD players implemented in software. Someday we will have high-definition television receivers implemented in software.
This is the wrong band for this type of service. The 2.4 GHz ISM band is an RF garbage dump. Unlicensed users, such as WiFi, are at the bottom of the heap. Unlicensed users may not cause interference to licensed users and must accept any interference they get. In other words, if another spectrum user is wiping out WiFi coverage in a specific area, tough shit, you have to live with it. The fact that the vast majority of WiFi equipment is designed to be cheap instead of being designed to have good RF performance, just makes things worse. WiFi is not the magic cure for all ills that some would hype it as.
For many years, the NSA used a Multics system, dockmaster, for Internet email and networked forums.
The security record of most operating systems is pathetic, including both the commercial and open source categories. Even OpenBSD relies on auditing after the fact, not on designing with security in mind at the beginning. Have we learned nothing since the introduction of Multics in 1965? Multics had a higher security evaluation than whatever POS is currently running on your desktop.