I know that every/.er does not want any type of virus on their systems and are quite capable of keeping them clean. But if you could force the average user to get rid of Mydoom the internet would be better. It's actual too bad that we almost need these white knights.
I'm lost as to your argument here, the long distance charges don't pop up and say "do you want to connect
to $country, long distance charges may apply" thats
why they refer to it as a high-jacked modem, sorry
if I seem sarcastic but I am confused
You'd think a hardware device on the user's side could provide the same functionality for less..
its called unplugging the phone cord
the software solution is called ad-aware/spybot S&D
I don't know why but this article made me think of pop-bottle rockets I used to make. 2L plastic bottle, tire valve stem, and a foot air pump
probably a pumped up version I assume
Poof microwave is currently frying birds from the strength of the slashdotting
full article
Microwave link across the Straits of Gibraltar.
Tarifa to Tangers
This document outlines the physical and technical issues involved in establishing a WLAN connection capable of real file transfer speeds up to 5.5mb/s from Tarifa in Spain to Tangers in Morocco. Connecting two continents, using the free 802.11 standard and free software.
It must be noted that the calculations in this document are derived from an amalgamation of equations found on the internet. There appear to be discrepancies between the various sources found, so should be used as guidance only. I shall visit the library in order to iron out the discrepancies.
Physical constraints
The distance from Tarifa to Tangers: 32,000 metres, mostly over water. There is a shorter link available to Ksar-es-Seghir, Morocco which is 20,000 metres.
Tarifa antenna position: On top of the castle (Castillo de Guzmán el Bueno) 20? metres above sea level.
Tangers antenna position: Presently unknown.
Technical
Link budget assessments
At a range of 32,000 metres.
Spain to Morocco Transmit power 15.0 dBm
Pigtail loss -0.3 dB
Cable loss 0 dB
Connector loss 0 dB
Antenna gain 24.0 dBi
Free space loss -130.1 dB
Antenna gain 24.0 dBi
Cable loss 0 dB
Connector loss 0 dB
Pigtail loss -0.3 dB
Receive sensitivity -82.0 dBm
Fade margin 10.3 dB
Morocco to Spain Transmit power 15.0 dBm
Pigtail loss -0.3 dB
Cable loss 0 dB
Connector loss 0 dB
Antenna gain 24.0 dBi
Free space loss -130.1 dB
Antenna gain 24.0 dBi
Cable loss 0 dB
Connector loss 0 dB
Pigtail loss -0.3 dB
Receive sensitivity -82.0 dBm
Fade margin 10.3 dB
10 dB is on the low side of acceptable, 16 to 20 dB would be preferable. This link budget assumes that the antennas are connected to the amplifier with the minimum of cabling. If more cabling is used, the losses in this must be accounted for.
The free space loss at 32,000 metres was calculated using javascript online calculator
Avoiding signal loss
* Keep the cable runs to a minimum
* Use maximum transmit power available
* Use maximum receive sensitivity available
Receiver sensitivity
Make 11Mbps 5.5Mbps 2Mbps 1Mbps
Orinocco cards PCMCIA Silver/Gold -82 -87 -91 -94
CISCO cards Aironet 350 -85 -89 -91 -94
Fresnel Zone analysis
With water being the main surface for the connection, the maximum point of the first Fresnel zone will be equidistant from each antenna i.e. the obstacle (water) is in the middle of the signal (d1 = d2).
R1 approximates to SqrRoot((lambda x d1 x d2)/d1+d2)
valid for d1,d2>>R1 where:
* R1 is the radius of the first Fresnel zone.
* d1 is the distance from first antenna to the obstacle
* d2 is the distance from second antenna to the obstacle
* lambda is the wavelength of the signal
Note: Only 60% of the first Fresnel zone (0.6 x R1) is needed for a line of sight connection.
Therefore at a range of 32,000 metres:
lambda = 0.122 m
d1 = 16,000 m
d2 = 16,000 m
R1 = SqrRoot(967)
R1 = 31.1 m
R1 x 60% = 18.7 metres
Thus, to allow for 60% of the first Fresnel Zone, the mid point of the connection will need to be 19 metres above the sea to maintain a radio connection. Therefore both antennas will need to be at least 19 metres above the top of the bulge in the sea (see below for the height of the bulge). This assumes that there are no other obstacles on land to deal with.
It seems this is not the only way to calculate the Fresnel zones, but each technique yields roughly the same answer.
Earth curvature
h = r(1-cos((PI x d) / (2 x PI x r)))
Angles in radians
* h is the height of the hump between the bases of the antennas.
* r is the radius of the planet. (3963,000 metres)
* d is the distance between the antennas on the surface of the planet
It should be noted that due to refraction the Earth curvature is reduced therefore the radius is considered to be 4/3r. This yields a result of 24 metres.
This calculation assumes the planet is a sphere, which is not quite true (very untrue in some places - but
Slashdot Mirror
Do you think that this would work with the logitech cordless duo if it is HID compliant?
If you are using firefox and use the live bookmarks feature it loads the normal green one
Lake Ontario is a pretty big lake FYI
its lose not loose!! sorry --grammar nazi
Someone call Jonny Knoxville there is another stupid sport he can try
I know that every /.er does not want any type of virus on their systems and are quite capable of keeping them clean. But if you could force the average user to get rid of Mydoom the internet would be better. It's actual too bad that we almost need these white knights.
You are correct sir now I wish I didn't make the "google" post
You could check google
Sorry mod me down but I'm always this sarcastic
make his counter go all the way around to zero again.
I am predicting a sharp increase in the number of broken ipods selling for $50
its fixed now
I'm lost as to your argument here, the long distance
charges don't pop up and say "do you want to connect
to $country, long distance charges may apply" thats
why they refer to it as a high-jacked modem, sorry
if I seem sarcastic but I am confused
You'd think a hardware device on the user's side could provide the same functionality for less..
its called unplugging the phone cord
the software solution is called ad-aware/spybot S&D
yes I just convinced a judge that I get to keep my IP address 127.0.0.1 sweet
I thought all M$ products were "easy to acquire"
Actually its not free at all M$ says they will release prices next calendar year and they will be "low-cost"
Extensions for 0.9.x can be found here
It seems installing over 0.9.0 will keep your old extentions and themes
install firesomething too its the best extention there is
Does anybody know if this will require a clean uninstall first??
unlicensed spectrum regulates you!!
I doubt compressed air will be any safer. Just different. You can be killed by compressed air just as easy as with black powder.
I don't know why but this article made me think of pop-bottle rockets I used to make. 2L plastic bottle, tire valve stem, and a foot air pump probably a pumped up version I assume
please get a keyboard with a working spacebar
Like communism, GPL-covered software will fail to reach its Utopian dreams
I just love this site it screams bias all over the place
they make a few good and true points but they skew the results up nicely
Poof microwave is currently frying birds from the strength of the slashdotting full article Microwave link across the Straits of Gibraltar. Tarifa to Tangers This document outlines the physical and technical issues involved in establishing a WLAN connection capable of real file transfer speeds up to 5.5mb/s from Tarifa in Spain to Tangers in Morocco. Connecting two continents, using the free 802.11 standard and free software. It must be noted that the calculations in this document are derived from an amalgamation of equations found on the internet. There appear to be discrepancies between the various sources found, so should be used as guidance only. I shall visit the library in order to iron out the discrepancies. Physical constraints The distance from Tarifa to Tangers: 32,000 metres, mostly over water. There is a shorter link available to Ksar-es-Seghir, Morocco which is 20,000 metres. Tarifa antenna position: On top of the castle (Castillo de Guzmán el Bueno) 20? metres above sea level. Tangers antenna position: Presently unknown. Technical Link budget assessments At a range of 32,000 metres. Spain to Morocco Transmit power 15.0 dBm Pigtail loss -0.3 dB Cable loss 0 dB Connector loss 0 dB Antenna gain 24.0 dBi Free space loss -130.1 dB Antenna gain 24.0 dBi Cable loss 0 dB Connector loss 0 dB Pigtail loss -0.3 dB Receive sensitivity -82.0 dBm Fade margin 10.3 dB Morocco to Spain Transmit power 15.0 dBm Pigtail loss -0.3 dB Cable loss 0 dB Connector loss 0 dB Antenna gain 24.0 dBi Free space loss -130.1 dB Antenna gain 24.0 dBi Cable loss 0 dB Connector loss 0 dB Pigtail loss -0.3 dB Receive sensitivity -82.0 dBm Fade margin 10.3 dB 10 dB is on the low side of acceptable, 16 to 20 dB would be preferable. This link budget assumes that the antennas are connected to the amplifier with the minimum of cabling. If more cabling is used, the losses in this must be accounted for. The free space loss at 32,000 metres was calculated using javascript online calculator Avoiding signal loss * Keep the cable runs to a minimum * Use maximum transmit power available * Use maximum receive sensitivity available Receiver sensitivity Make 11Mbps 5.5Mbps 2Mbps 1Mbps Orinocco cards PCMCIA Silver/Gold -82 -87 -91 -94 CISCO cards Aironet 350 -85 -89 -91 -94 Fresnel Zone analysis With water being the main surface for the connection, the maximum point of the first Fresnel zone will be equidistant from each antenna i.e. the obstacle (water) is in the middle of the signal (d1 = d2). R1 approximates to SqrRoot((lambda x d1 x d2)/d1+d2) valid for d1,d2>>R1 where: * R1 is the radius of the first Fresnel zone. * d1 is the distance from first antenna to the obstacle * d2 is the distance from second antenna to the obstacle * lambda is the wavelength of the signal Note: Only 60% of the first Fresnel zone (0.6 x R1) is needed for a line of sight connection. Therefore at a range of 32,000 metres: lambda = 0.122 m d1 = 16,000 m d2 = 16,000 m R1 = SqrRoot(967) R1 = 31.1 m R1 x 60% = 18.7 metres Thus, to allow for 60% of the first Fresnel Zone, the mid point of the connection will need to be 19 metres above the sea to maintain a radio connection. Therefore both antennas will need to be at least 19 metres above the top of the bulge in the sea (see below for the height of the bulge). This assumes that there are no other obstacles on land to deal with. It seems this is not the only way to calculate the Fresnel zones, but each technique yields roughly the same answer. Earth curvature h = r(1-cos((PI x d) / (2 x PI x r))) Angles in radians * h is the height of the hump between the bases of the antennas. * r is the radius of the planet. (3963,000 metres) * d is the distance between the antennas on the surface of the planet It should be noted that due to refraction the Earth curvature is reduced therefore the radius is considered to be 4/3r. This yields a result of 24 metres. This calculation assumes the planet is a sphere, which is not quite true (very untrue in some places - but
I would like to see the PDF specs and bugmenot has no log-in information
according to new.com.com it is Digital Millennium Copyright Act but the article says Digital Media Consumers' Rights Act which is which?