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Earth to Mars in 3 hours?
Written by Vice Admiral Enzore Dax   
Tuesday, 22 November 2005

 IAN JOHNSTON  - Article found on news.scotsman.com

AN EXTRAORDINARY "hyperspace" engine that could make interstellar space travel a reality by flying into other dimensions is being investigated by the United States government.

The hypothetical device, which has been outlined in principle but is based on a controversial theory about the fabric of the universe, could potentially allow a spacecraft to travel to Mars in three hours and journey to a star 11 light years away in just 80 days, according to a report in today's New Scientist magazine.

 

 

The theoretical engine works by creating an intense magnetic field that, according to ideas first developed by the late scientist Burkhard Heim in the 1950s, would produce a gravitational field and result in thrust for a spacecraft.

Also, if a large enough magnetic field was created, the craft would slip into a different dimension, where the speed of light is faster, allowing incredible speeds to be reached. Switching off the magnetic field would result in the engine reappearing in our current dimension.

The US air force has expressed an interest in the idea and scientists working for the American Department of Energy - which has a device known as the Z Machine that could generate the kind of magnetic fields required to drive the engine - say they may carry out a test if the theory withstands further scrutiny.

Professor Jochem Hauser, one of the scientists who put forward the idea, told The Scotsman that if everything went well a working engine could be tested in about five years.

However, Prof Hauser, a physicist at the Applied Sciences University in Salzgitter, Germany, and a former chief of aerodynamics at the European Space Agency, cautioned it was based on a highly controversial theory that would require a significant change in the current understanding of the laws of physics.

"It would be amazing. I have been working on propulsion systems for quite a while and it would be the most amazing thing. The benefits would be almost unlimited," he said.

"But this thing is not around the corner; we first have to prove the basic science is correct and there are quite a few physicists who have a different opinion.

"It's our job to prove we are right and we are working on that."

He said the engine would enable spaceships to travel to different solar systems. "If the theory is correct then this is not science fiction, it is science fact," Prof Hauser said.

"NASA have contacted me and next week I'm going to see someone from the [US] air force to talk about it further, but it is at a very early stage. I think the best-case scenario would be within the next five years [to build a test device] if the technology works."

The US authorities' attention was attracted after Prof Hauser and an Austrian colleague, Walter Droscher, wrote a paper called "Guidelines for a space propulsion device based on Heim's quantum theory".

Last Updated ( Wednesday, 01 February 2006 )
Can users edit content from the front end?
Written by Vice Admiral Enzore Dax   
Tuesday, 22 November 2005
Yes, if they are registered users who are logged into the system, and if you have given them permission. There are three user levels which have this power:
  • Author - This group allows a user to post content, usually via a link in the User Menu.
  • Editor - This group allows a user to post and edit any content item from the Front-end.
  • Publisher - This group allows a user to post, edit and publish any content item from the Front-end.
Last Updated ( Tuesday, 22 November 2005 )
Can I show different users different content?
Written by Vice Admiral Enzore Dax   
Tuesday, 22 November 2005
Within limits. The Mambo User Manager currently only supports a few levels ("groups") of users. You can show different content to different groups, but you cannot show each individual user a unique set of content. Put another way, every user in the group will see the same content as the other users in the group. If you really need this functionality, there are some third party components which add additional flexibility.
Last Updated ( Tuesday, 22 November 2005 )
How do I keep track of security advisories?
Written by Vice Admiral Enzore Dax   
Tuesday, 22 November 2005
Visit the Forums regularly and subscribe to the Mambo Security Announcements mailing list.
Last Updated ( Tuesday, 22 November 2005 )
How do I secure my Mambo site?
Written by Vice Admiral Enzore Dax   
Tuesday, 22 November 2005
A simple question with a complex answer! It is complex because security issues arise from a variety of sources: your code, your server, the other things running on your server, the users, etc. While Mambo itself is relatively secure, you may still experience problems if the server is compromised or if a user gives up a password. The basic steps you should take however include:
  • Do not unnecessarily leave directories open with CHMOD set at 777 (configuration.php in particular should be set to chmod 644)
  • Delete your old installation directory (don't just rename it!).
  • Implement HTTP access controls for your admin login.
  • Make all your admin passwords at least 8 characters and containing symbols and numbers as well as letters.
There's more that you can do, but it is outside the scope of this FAQ.
Last Updated ( Tuesday, 22 November 2005 )
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