http://www.physorg.com/news106210179.html

Israeli Researcher Develops New Theoretical Model of Time Machine

Technion Israel Institute of Technology researchers have developed a
theoretical model of a time machine that, in the distant future, could
possibly enable future generations to travel into the past. An article on
this research was published last week in the scientific journal Physical
Review.
"In order to travel back in time, the spacetime structure must be engineered
appropriately," explains Prof. Amos Ori of the Technion's Faculty of
Physics. "This is what Einstein's theory of general relativity deals with.
It says that spacetime can be flat. That is - it has a trivial, simple
structure. But it can also be curved with various configurations. According
to the theory of relativity, the essence of gravitational fields is in the
curving of spacetime. The theory of relativity also defines how space is
curved and how this curvature develops over time."

The main question is - if according to the principles of curvature
development in the theory of relativity - can a time machine be created? In
other words - can we cause spacetime to curve in such a way as to enable
travel back in time? Such a journey requires a significant curvature of
spacetime, in a very special form.

Traveling back in time is actually closing time-like curves so we can go
back to an event at which we were present in the past. In flat space, it is
not possible to close curves and go back in time. In order for closed
time-like curves to exist, there has to be a curvature of a specific form on
spacetime.

The question Prof. Ori is investigating is - do the laws of gravity permit
the development of spacetime with the required curvature (closed time-like
curves)? In the past, scientists raised a number of objections to this
possibility.

Prof. Ori is proposing a theoretical model for spacetime that could develop
into a time machine. The model overcomes some of the questions, which, until
now, scientists have not succeeded in solving. One of the difficult claims
against a time machine was that, in order to create a time machine, it would
be necessary for it to contain material with negative density. And since we
do not have such material - and it is also not clear if the laws of nature
enable the existence of such material in the quantities required - it is not
possible to build a time machine. Now, Prof. Ori comes along and proposes a
theoretical model that does not require material with negative density. The
model that he proposes is, essentially, a vacuum space that contains a
region field with standard positive density material.

"The machine is spacetime itself," he explains. "Today, if we were to create
a time machine - an area with a warp like this in space that would enable
time lines to close on themselves - it might enable future generations to
return to visit our time. We, apparently, cannot return to previous ages
because our predecessors did not create this infrastructure for us."

Prof. Ori emphasizes that we still do not have the technology to control
gravitational fields at will, despite the fact that the theoretical
principles of how to do this exist. "The model that we developed at the
Technion is a significant step but there still remains a number of
non-trivial open questions," he stresses. "It may be that some of these
questions also will not be solved in the future. This is still not clear."

As an example, he brings up the problem of instability according to which in
spacetime with a time machine there could be disturbances with increasing
strength so that spacetime would be disrupted to such an extent that it
would cancel out the time machine. Prof. Ori, one of the few scientists in
the world investigating this issue, hopes that continued research will
present a clearer picture with respect to these questions.
-- 

Ken

"Buddhism elucidates why we are sentient."
"Buddhism follows thought throughout the Universe."
"Karma means that you don't get away with anything."

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

"Ken Kubos"  wrote in
news:13c1llj5dh8q17@corp.supernews.com: 

> http://www.physorg.com/news106210179.html
> 
> Israeli Researcher Develops New Theoretical Model of Time Machine
> 
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article
> on this research was published last week in the scientific journal
> Physical Review.
> "In order to travel back in time, the spacetime structure must be
> engineered appropriately," explains Prof. Amos Ori of the Technion's
> Faculty of Physics. "This is what Einstein's theory of general
> relativity deals with. It says that spacetime can be flat. That is -
> it has a trivial, simple structure. But it can also be curved with
> various configurations. According to the theory of relativity, the
> essence of gravitational fields is in the curving of spacetime. The
> theory of relativity also defines how space is curved and how this
> curvature develops over time." 
> 
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be
> created? In other words - can we cause spacetime to curve in such a
> way as to enable travel back in time? Such a journey requires a
> significant curvature of spacetime, in a very special form.
> 
> Traveling back in time is actually closing time-like curves so we can
> go back to an event at which we were present in the past. In flat
> space, it is not possible to close curves and go back in time. In
> order for closed time-like curves to exist, there has to be a
> curvature of a specific form on spacetime.
> 
> The question Prof. Ori is investigating is - do the laws of gravity
> permit the development of spacetime with the required curvature
> (closed time-like curves)? In the past, scientists raised a number of
> objections to this possibility.
> 
> Prof. Ori is proposing a theoretical model for spacetime that could
> develop into a time machine. The model overcomes some of the
> questions, which, until now, scientists have not succeeded in solving.
> One of the difficult claims against a time machine was that, in order
> to create a time machine, it would be necessary for it to contain
> material with negative density. And since we do not have such material
> - and it is also not clear if the laws of nature enable the existence
> of such material in the quantities required - it is not possible to
> build a time machine. Now, Prof. Ori comes along and proposes a 
> theoretical model that does not require material with negative
> density. The model that he proposes is, essentially, a vacuum space
> that contains a region field with standard positive density material.
> 
> "The machine is spacetime itself," he explains. "Today, if we were to
> create a time machine - an area with a warp like this in space that
> would enable time lines to close on themselves - it might enable
> future generations to return to visit our time. We, apparently, cannot
> return to previous ages because our predecessors did not create this
> infrastructure for us." 
> 
> Prof. Ori emphasizes that we still do not have the technology to
> control gravitational fields at will, despite the fact that the
> theoretical principles of how to do this exist. "The model that we
> developed at the Technion is a significant step but there still
> remains a number of non-trivial open questions," he stresses. "It may
> be that some of these questions also will not be solved in the future.
> This is still not clear." 
> 
> As an example, he brings up the problem of instability according to
> which in spacetime with a time machine there could be disturbances
> with increasing strength so that spacetime would be disrupted to such
> an extent that it would cancel out the time machine. Prof. Ori, one of
> the few scientists in the world investigating this issue, hopes that
> continued research will present a clearer picture with respect to
> these questions. 

Why would any sentient want to go back in time?

Back to some time where fear and ignorance was running rampant.
Destiny, the future, a better understanding a better way to use our 
current resources towards a better world but also a better navigator on 
this space-ship earth, to the heavens and into the heart of the grandest 
and most magnificent journey.

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

"Ken Kubos"  wrote in
news:13c1llj5dh8q17@corp.supernews.com: 

> http://www.physorg.com/news106210179.html
> 
> Israeli Researcher Develops New Theoretical Model of Time Machine
> 
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article
> on this research was published last week in the scientific journal
> Physical Review.
> "In order to travel back in time, the spacetime structure must be
> engineered appropriately," explains Prof. Amos Ori of the Technion's
> Faculty of Physics. "This is what Einstein's theory of general
> relativity deals with. It says that spacetime can be flat. That is -
> it has a trivial, simple structure. But it can also be curved with
> various configurations. According to the theory of relativity, the
> essence of gravitational fields is in the curving of spacetime. The
> theory of relativity also defines how space is curved and how this
> curvature develops over time." 
> 
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be
> created? In other words - can we cause spacetime to curve in such a
> way as to enable travel back in time? Such a journey requires a
> significant curvature of spacetime, in a very special form.
> 
> Traveling back in time is actually closing time-like curves so we can
> go back to an event at which we were present in the past. In flat
> space, it is not possible to close curves and go back in time. In
> order for closed time-like curves to exist, there has to be a
> curvature of a specific form on spacetime.
> 
> The question Prof. Ori is investigating is - do the laws of gravity
> permit the development of spacetime with the required curvature
> (closed time-like curves)? In the past, scientists raised a number of
> objections to this possibility.
> 
> Prof. Ori is proposing a theoretical model for spacetime that could
> develop into a time machine. The model overcomes some of the
> questions, which, until now, scientists have not succeeded in solving.
> One of the difficult claims against a time machine was that, in order
> to create a time machine, it would be necessary for it to contain
> material with negative density. And since we do not have such material
> - and it is also not clear if the laws of nature enable the existence
> of such material in the quantities required - it is not possible to
> build a time machine. Now, Prof. Ori comes along and proposes a 
> theoretical model that does not require material with negative
> density. The model that he proposes is, essentially, a vacuum space
> that contains a region field with standard positive density material.
> 
> "The machine is spacetime itself," he explains. "Today, if we were to
> create a time machine - an area with a warp like this in space that
> would enable time lines to close on themselves - it might enable
> future generations to return to visit our time. We, apparently, cannot
> return to previous ages because our predecessors did not create this
> infrastructure for us." 
> 
> Prof. Ori emphasizes that we still do not have the technology to
> control gravitational fields at will, despite the fact that the
> theoretical principles of how to do this exist. "The model that we
> developed at the Technion is a significant step but there still
> remains a number of non-trivial open questions," he stresses. "It may
> be that some of these questions also will not be solved in the future.
> This is still not clear." 
> 
> As an example, he brings up the problem of instability according to
> which in spacetime with a time machine there could be disturbances
> with increasing strength so that spacetime would be disrupted to such
> an extent that it would cancel out the time machine. Prof. Ori, one of
> the few scientists in the world investigating this issue, hopes that
> continued research will present a clearer picture with respect to
> these questions. 

Why would any sentient want to go back in time?

Back to some time where fear and ignorance was running rampant.
Destiny, the future, a better understanding a better way to use our 
current resources towards a better world but also a better navigator on 
this space-ship earth, to the heavens and into the heart of the grandest 
and most magnificent journey.

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

"Ken Kubos"  wrote in
news:13c1llj5dh8q17@corp.supernews.com: 

> http://www.physorg.com/news106210179.html
> 
> Israeli Researcher Develops New Theoretical Model of Time Machine
> 
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article
> on this research was published last week in the scientific journal
> Physical Review.
> "In order to travel back in time, the spacetime structure must be
> engineered appropriately," explains Prof. Amos Ori of the Technion's
> Faculty of Physics. "This is what Einstein's theory of general
> relativity deals with. It says that spacetime can be flat. That is -
> it has a trivial, simple structure. But it can also be curved with
> various configurations. According to the theory of relativity, the
> essence of gravitational fields is in the curving of spacetime. The
> theory of relativity also defines how space is curved and how this
> curvature develops over time." 
> 
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be
> created? In other words - can we cause spacetime to curve in such a
> way as to enable travel back in time? Such a journey requires a
> significant curvature of spacetime, in a very special form.
> 
> Traveling back in time is actually closing time-like curves so we can
> go back to an event at which we were present in the past. In flat
> space, it is not possible to close curves and go back in time. In
> order for closed time-like curves to exist, there has to be a
> curvature of a specific form on spacetime.
> 
> The question Prof. Ori is investigating is - do the laws of gravity
> permit the development of spacetime with the required curvature
> (closed time-like curves)? In the past, scientists raised a number of
> objections to this possibility.
> 
> Prof. Ori is proposing a theoretical model for spacetime that could
> develop into a time machine. The model overcomes some of the
> questions, which, until now, scientists have not succeeded in solving.
> One of the difficult claims against a time machine was that, in order
> to create a time machine, it would be necessary for it to contain
> material with negative density. And since we do not have such material
> - and it is also not clear if the laws of nature enable the existence
> of such material in the quantities required - it is not possible to
> build a time machine. Now, Prof. Ori comes along and proposes a 
> theoretical model that does not require material with negative
> density. The model that he proposes is, essentially, a vacuum space
> that contains a region field with standard positive density material.
> 
> "The machine is spacetime itself," he explains. "Today, if we were to
> create a time machine - an area with a warp like this in space that
> would enable time lines to close on themselves - it might enable
> future generations to return to visit our time. We, apparently, cannot
> return to previous ages because our predecessors did not create this
> infrastructure for us." 
> 
> Prof. Ori emphasizes that we still do not have the technology to
> control gravitational fields at will, despite the fact that the
> theoretical principles of how to do this exist. "The model that we
> developed at the Technion is a significant step but there still
> remains a number of non-trivial open questions," he stresses. "It may
> be that some of these questions also will not be solved in the future.
> This is still not clear." 
> 
> As an example, he brings up the problem of instability according to
> which in spacetime with a time machine there could be disturbances
> with increasing strength so that spacetime would be disrupted to such
> an extent that it would cancel out the time machine. Prof. Ori, one of
> the few scientists in the world investigating this issue, hopes that
> continued research will present a clearer picture with respect to
> these questions. 

Why would any sentient want to go back in time?

Back to some time where fear and ignorance was running rampant.
Destiny, the future, a better understanding a better way to use our 
current resources towards a better world but also a better navigator on 
this space-ship earth, to the heavens and into the heart of the grandest 
and most magnificent journey.

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

"Ken Kubos"  wrote in
news:13c1llj5dh8q17@corp.supernews.com: 

> http://www.physorg.com/news106210179.html
> 
> Israeli Researcher Develops New Theoretical Model of Time Machine
> 
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article
> on this research was published last week in the scientific journal
> Physical Review.
> "In order to travel back in time, the spacetime structure must be
> engineered appropriately," explains Prof. Amos Ori of the Technion's
> Faculty of Physics. "This is what Einstein's theory of general
> relativity deals with. It says that spacetime can be flat. That is -
> it has a trivial, simple structure. But it can also be curved with
> various configurations. According to the theory of relativity, the
> essence of gravitational fields is in the curving of spacetime. The
> theory of relativity also defines how space is curved and how this
> curvature develops over time." 
> 
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be
> created? In other words - can we cause spacetime to curve in such a
> way as to enable travel back in time? Such a journey requires a
> significant curvature of spacetime, in a very special form.
> 
> Traveling back in time is actually closing time-like curves so we can
> go back to an event at which we were present in the past. In flat
> space, it is not possible to close curves and go back in time. In
> order for closed time-like curves to exist, there has to be a
> curvature of a specific form on spacetime.
> 
> The question Prof. Ori is investigating is - do the laws of gravity
> permit the development of spacetime with the required curvature
> (closed time-like curves)? In the past, scientists raised a number of
> objections to this possibility.
> 
> Prof. Ori is proposing a theoretical model for spacetime that could
> develop into a time machine. The model overcomes some of the
> questions, which, until now, scientists have not succeeded in solving.
> One of the difficult claims against a time machine was that, in order
> to create a time machine, it would be necessary for it to contain
> material with negative density. And since we do not have such material
> - and it is also not clear if the laws of nature enable the existence
> of such material in the quantities required - it is not possible to
> build a time machine. Now, Prof. Ori comes along and proposes a 
> theoretical model that does not require material with negative
> density. The model that he proposes is, essentially, a vacuum space
> that contains a region field with standard positive density material.
> 
> "The machine is spacetime itself," he explains. "Today, if we were to
> create a time machine - an area with a warp like this in space that
> would enable time lines to close on themselves - it might enable
> future generations to return to visit our time. We, apparently, cannot
> return to previous ages because our predecessors did not create this
> infrastructure for us." 
> 
> Prof. Ori emphasizes that we still do not have the technology to
> control gravitational fields at will, despite the fact that the
> theoretical principles of how to do this exist. "The model that we
> developed at the Technion is a significant step but there still
> remains a number of non-trivial open questions," he stresses. "It may
> be that some of these questions also will not be solved in the future.
> This is still not clear." 
> 
> As an example, he brings up the problem of instability according to
> which in spacetime with a time machine there could be disturbances
> with increasing strength so that spacetime would be disrupted to such
> an extent that it would cancel out the time machine. Prof. Ori, one of
> the few scientists in the world investigating this issue, hopes that
> continued research will present a clearer picture with respect to
> these questions. 

Why would any sentient want to go back in time?

Back to some time where fear and ignorance was running rampant.
Destiny, the future, a better understanding a better way to use our 
current resources towards a better world but also a better navigator on 
this space-ship earth, to the heavens and into the heart of the grandest 
and most magnificent journey.

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

"Ken Kubos"  wrote in
news:13c1llj5dh8q17@corp.supernews.com: 

> http://www.physorg.com/news106210179.html
> 
> Israeli Researcher Develops New Theoretical Model of Time Machine
> 
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article
> on this research was published last week in the scientific journal
> Physical Review.
> "In order to travel back in time, the spacetime structure must be
> engineered appropriately," explains Prof. Amos Ori of the Technion's
> Faculty of Physics. "This is what Einstein's theory of general
> relativity deals with. It says that spacetime can be flat. That is -
> it has a trivial, simple structure. But it can also be curved with
> various configurations. According to the theory of relativity, the
> essence of gravitational fields is in the curving of spacetime. The
> theory of relativity also defines how space is curved and how this
> curvature develops over time." 
> 
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be
> created? In other words - can we cause spacetime to curve in such a
> way as to enable travel back in time? Such a journey requires a
> significant curvature of spacetime, in a very special form.
> 
> Traveling back in time is actually closing time-like curves so we can
> go back to an event at which we were present in the past. In flat
> space, it is not possible to close curves and go back in time. In
> order for closed time-like curves to exist, there has to be a
> curvature of a specific form on spacetime.
> 
> The question Prof. Ori is investigating is - do the laws of gravity
> permit the development of spacetime with the required curvature
> (closed time-like curves)? In the past, scientists raised a number of
> objections to this possibility.
> 
> Prof. Ori is proposing a theoretical model for spacetime that could
> develop into a time machine. The model overcomes some of the
> questions, which, until now, scientists have not succeeded in solving.
> One of the difficult claims against a time machine was that, in order
> to create a time machine, it would be necessary for it to contain
> material with negative density. And since we do not have such material
> - and it is also not clear if the laws of nature enable the existence
> of such material in the quantities required - it is not possible to
> build a time machine. Now, Prof. Ori comes along and proposes a 
> theoretical model that does not require material with negative
> density. The model that he proposes is, essentially, a vacuum space
> that contains a region field with standard positive density material.
> 
> "The machine is spacetime itself," he explains. "Today, if we were to
> create a time machine - an area with a warp like this in space that
> would enable time lines to close on themselves - it might enable
> future generations to return to visit our time. We, apparently, cannot
> return to previous ages because our predecessors did not create this
> infrastructure for us." 
> 
> Prof. Ori emphasizes that we still do not have the technology to
> control gravitational fields at will, despite the fact that the
> theoretical principles of how to do this exist. "The model that we
> developed at the Technion is a significant step but there still
> remains a number of non-trivial open questions," he stresses. "It may
> be that some of these questions also will not be solved in the future.
> This is still not clear." 
> 
> As an example, he brings up the problem of instability according to
> which in spacetime with a time machine there could be disturbances
> with increasing strength so that spacetime would be disrupted to such
> an extent that it would cancel out the time machine. Prof. Ori, one of
> the few scientists in the world investigating this issue, hopes that
> continued research will present a clearer picture with respect to
> these questions. 

Why would any sentient want to go back in time?

Back to some time where fear and ignorance was running rampant.
Destiny, the future, a better understanding a better way to use our 
current resources towards a better world but also a better navigator on 
this space-ship earth, to the heavens and into the heart of the grandest 
and most magnificent journey.

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

"Ken Kubos"  wrote in
news:13c1llj5dh8q17@corp.supernews.com: 

> http://www.physorg.com/news106210179.html
> 
> Israeli Researcher Develops New Theoretical Model of Time Machine
> 
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article
> on this research was published last week in the scientific journal
> Physical Review.
> "In order to travel back in time, the spacetime structure must be
> engineered appropriately," explains Prof. Amos Ori of the Technion's
> Faculty of Physics. "This is what Einstein's theory of general
> relativity deals with. It says that spacetime can be flat. That is -
> it has a trivial, simple structure. But it can also be curved with
> various configurations. According to the theory of relativity, the
> essence of gravitational fields is in the curving of spacetime. The
> theory of relativity also defines how space is curved and how this
> curvature develops over time." 
> 
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be
> created? In other words - can we cause spacetime to curve in such a
> way as to enable travel back in time? Such a journey requires a
> significant curvature of spacetime, in a very special form.
> 
> Traveling back in time is actually closing time-like curves so we can
> go back to an event at which we were present in the past. In flat
> space, it is not possible to close curves and go back in time. In
> order for closed time-like curves to exist, there has to be a
> curvature of a specific form on spacetime.
> 
> The question Prof. Ori is investigating is - do the laws of gravity
> permit the development of spacetime with the required curvature
> (closed time-like curves)? In the past, scientists raised a number of
> objections to this possibility.
> 
> Prof. Ori is proposing a theoretical model for spacetime that could
> develop into a time machine. The model overcomes some of the
> questions, which, until now, scientists have not succeeded in solving.
> One of the difficult claims against a time machine was that, in order
> to create a time machine, it would be necessary for it to contain
> material with negative density. And since we do not have such material
> - and it is also not clear if the laws of nature enable the existence
> of such material in the quantities required - it is not possible to
> build a time machine. Now, Prof. Ori comes along and proposes a 
> theoretical model that does not require material with negative
> density. The model that he proposes is, essentially, a vacuum space
> that contains a region field with standard positive density material.
> 
> "The machine is spacetime itself," he explains. "Today, if we were to
> create a time machine - an area with a warp like this in space that
> would enable time lines to close on themselves - it might enable
> future generations to return to visit our time. We, apparently, cannot
> return to previous ages because our predecessors did not create this
> infrastructure for us." 
> 
> Prof. Ori emphasizes that we still do not have the technology to
> control gravitational fields at will, despite the fact that the
> theoretical principles of how to do this exist. "The model that we
> developed at the Technion is a significant step but there still
> remains a number of non-trivial open questions," he stresses. "It may
> be that some of these questions also will not be solved in the future.
> This is still not clear." 
> 
> As an example, he brings up the problem of instability according to
> which in spacetime with a time machine there could be disturbances
> with increasing strength so that spacetime would be disrupted to such
> an extent that it would cancel out the time machine. Prof. Ori, one of
> the few scientists in the world investigating this issue, hopes that
> continued research will present a clearer picture with respect to
> these questions. 

Why would any sentient want to go back in time?

Back to some time where fear and ignorance was running rampant.
Destiny, the future, a better understanding a better way to use our 
current resources towards a better world but also a better navigator on 
this space-ship earth, to the heavens and into the heart of the grandest 
and most magnificent journey.

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

"Ken Kubos"  wrote in
news:13c1llj5dh8q17@corp.supernews.com: 

> http://www.physorg.com/news106210179.html
> 
> Israeli Researcher Develops New Theoretical Model of Time Machine
> 
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article
> on this research was published last week in the scientific journal
> Physical Review.
> "In order to travel back in time, the spacetime structure must be
> engineered appropriately," explains Prof. Amos Ori of the Technion's
> Faculty of Physics. "This is what Einstein's theory of general
> relativity deals with. It says that spacetime can be flat. That is -
> it has a trivial, simple structure. But it can also be curved with
> various configurations. According to the theory of relativity, the
> essence of gravitational fields is in the curving of spacetime. The
> theory of relativity also defines how space is curved and how this
> curvature develops over time." 
> 
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be
> created? In other words - can we cause spacetime to curve in such a
> way as to enable travel back in time? Such a journey requires a
> significant curvature of spacetime, in a very special form.
> 
> Traveling back in time is actually closing time-like curves so we can
> go back to an event at which we were present in the past. In flat
> space, it is not possible to close curves and go back in time. In
> order for closed time-like curves to exist, there has to be a
> curvature of a specific form on spacetime.
> 
> The question Prof. Ori is investigating is - do the laws of gravity
> permit the development of spacetime with the required curvature
> (closed time-like curves)? In the past, scientists raised a number of
> objections to this possibility.
> 
> Prof. Ori is proposing a theoretical model for spacetime that could
> develop into a time machine. The model overcomes some of the
> questions, which, until now, scientists have not succeeded in solving.
> One of the difficult claims against a time machine was that, in order
> to create a time machine, it would be necessary for it to contain
> material with negative density. And since we do not have such material
> - and it is also not clear if the laws of nature enable the existence
> of such material in the quantities required - it is not possible to
> build a time machine. Now, Prof. Ori comes along and proposes a 
> theoretical model that does not require material with negative
> density. The model that he proposes is, essentially, a vacuum space
> that contains a region field with standard positive density material.
> 
> "The machine is spacetime itself," he explains. "Today, if we were to
> create a time machine - an area with a warp like this in space that
> would enable time lines to close on themselves - it might enable
> future generations to return to visit our time. We, apparently, cannot
> return to previous ages because our predecessors did not create this
> infrastructure for us." 
> 
> Prof. Ori emphasizes that we still do not have the technology to
> control gravitational fields at will, despite the fact that the
> theoretical principles of how to do this exist. "The model that we
> developed at the Technion is a significant step but there still
> remains a number of non-trivial open questions," he stresses. "It may
> be that some of these questions also will not be solved in the future.
> This is still not clear." 
> 
> As an example, he brings up the problem of instability according to
> which in spacetime with a time machine there could be disturbances
> with increasing strength so that spacetime would be disrupted to such
> an extent that it would cancel out the time machine. Prof. Ori, one of
> the few scientists in the world investigating this issue, hopes that
> continued research will present a clearer picture with respect to
> these questions. 

Why would any sentient want to go back in time?

Back to some time where fear and ignorance was running rampant.
Destiny, the future, a better understanding a better way to use our 
current resources towards a better world but also a better navigator on 
this space-ship earth, to the heavens and into the heart of the grandest 
and most magnificent journey.

Suppose it's true that could mean a couple of things since we never 
encountered time travellers, except if you believe ufo's are time machines:

1. We will never be able to create such a machine,

or

2. Earth will be destroyed before we can create such a machine ;)

or

3. Time travellers or invisible because they are kinda in another dimension 
;) but can see us :)

I think 1 or 2 sounds plausible :)

Bye,
  Skybuck.

"Ken Kubos"  wrote in message 
news:13c1llj5dh8q17@corp.supernews.com...
> http://www.physorg.com/news106210179.html
>
> Israeli Researcher Develops New Theoretical Model of Time Machine
>
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article on
> this research was published last week in the scientific journal Physical
> Review.
> "In order to travel back in time, the spacetime structure must be 
> engineered
> appropriately," explains Prof. Amos Ori of the Technion's Faculty of
> Physics. "This is what Einstein's theory of general relativity deals with.
> It says that spacetime can be flat. That is - it has a trivial, simple
> structure. But it can also be curved with various configurations. 
> According
> to the theory of relativity, the essence of gravitational fields is in the
> curving of spacetime. The theory of relativity also defines how space is
> curved and how this curvature develops over time."
>
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be created? 
> In
> other words - can we cause spacetime to curve in such a way as to enable
> travel back in time? Such a journey requires a significant curvature of
> spacetime, in a very special form.
>
> Traveling back in time is actually closing time-like curves so we can go
> back to an event at which we were present in the past. In flat space, it 
> is
> not possible to close curves and go back in time. In order for closed
> time-like curves to exist, there has to be a curvature of a specific form 
> on
> spacetime.
>
> The question Prof. Ori is investigating is - do the laws of gravity permit
> the development of spacetime with the required curvature (closed time-like
> curves)? In the past, scientists raised a number of objections to this
> possibility.
>
> Prof. Ori is proposing a theoretical model for spacetime that could 
> develop
> into a time machine. The model overcomes some of the questions, which, 
> until
> now, scientists have not succeeded in solving. One of the difficult claims
> against a time machine was that, in order to create a time machine, it 
> would
> be necessary for it to contain material with negative density. And since 
> we
> do not have such material - and it is also not clear if the laws of nature
> enable the existence of such material in the quantities required - it is 
> not
> possible to build a time machine. Now, Prof. Ori comes along and proposes 
> a
> theoretical model that does not require material with negative density. 
> The
> model that he proposes is, essentially, a vacuum space that contains a
> region field with standard positive density material.
>
> "The machine is spacetime itself," he explains. "Today, if we were to 
> create
> a time machine - an area with a warp like this in space that would enable
> time lines to close on themselves - it might enable future generations to
> return to visit our time. We, apparently, cannot return to previous ages
> because our predecessors did not create this infrastructure for us."
>
> Prof. Ori emphasizes that we still do not have the technology to control
> gravitational fields at will, despite the fact that the theoretical
> principles of how to do this exist. "The model that we developed at the
> Technion is a significant step but there still remains a number of
> non-trivial open questions," he stresses. "It may be that some of these
> questions also will not be solved in the future. This is still not clear."
>
> As an example, he brings up the problem of instability according to which 
> in
> spacetime with a time machine there could be disturbances with increasing
> strength so that spacetime would be disrupted to such an extent that it
> would cancel out the time machine. Prof. Ori, one of the few scientists in
> the world investigating this issue, hopes that continued research will
> present a clearer picture with respect to these questions.
> -- 
>
> Ken
>
> "Buddhism elucidates why we are sentient."
> "Buddhism follows thought throughout the Universe."
> "Karma means that you don't get away with anything."
>
>
>

"Ken Kubos"  wrote in
news:13c1llj5dh8q17@corp.supernews.com: 

> http://www.physorg.com/news106210179.html
> 
> Israeli Researcher Develops New Theoretical Model of Time Machine
> 
> Technion Israel Institute of Technology researchers have developed a
> theoretical model of a time machine that, in the distant future, could
> possibly enable future generations to travel into the past. An article
> on this research was published last week in the scientific journal
> Physical Review.
> "In order to travel back in time, the spacetime structure must be
> engineered appropriately," explains Prof. Amos Ori of the Technion's
> Faculty of Physics. "This is what Einstein's theory of general
> relativity deals with. It says that spacetime can be flat. That is -
> it has a trivial, simple structure. But it can also be curved with
> various configurations. According to the theory of relativity, the
> essence of gravitational fields is in the curving of spacetime. The
> theory of relativity also defines how space is curved and how this
> curvature develops over time." 
> 
> The main question is - if according to the principles of curvature
> development in the theory of relativity - can a time machine be
> created? In other words - can we cause spacetime to curve in such a
> way as to enable travel back in time? Such a journey requires a
> significant curvature of spacetime, in a very special form.
> 
> Traveling back in time is actually closing time-like curves so we can
> go back to an event at which we were present in the past. In flat
> space, it is not possible to close curves and go back in time. In
> order for closed time-like curves to exist, there has to be a
> curvature of a specific form on spacetime.
> 
> The question Prof. Ori is investigating is - do the laws of gravity
> permit the development of spacetime with the required curvature
> (closed time-like curves)? In the past, scientists raised a number of
> objections to this possibility.
> 
> Prof. Ori is proposing a theoretical model for spacetime that could
> develop into a time machine. The model overcomes some of the
> questions, which, until now, scientists have not succeeded in solving.
> One of the difficult claims against a time machine was that, in order
> to create a time machine, it would be necessary for it to contain
> material with negative density. And since we do not have such material
> - and it is also not clear if the laws of nature enable the existence
> of such material in the quantities required - it is not possible to
> build a time machine. Now, Prof. Ori comes along and proposes a 
> theoretical model that does not require material with negative
> density. The model that he proposes is, essentially, a vacuum space
> that contains a region field with standard positive density material.
> 
> "The machine is spacetime itself," he explains. "Today, if we were to
> create a time machine - an area with a warp like this in space that
> would enable time lines to close on themselves - it might enable
> future generations to return to visit our time. We, apparently, cannot
> return to previous ages because our predecessors did not create this
> infrastructure for us." 
> 
> Prof. Ori emphasizes that we still do not have the technology to
> control gravitational fields at will, despite the fact that the
> theoretical principles of how to do this exist. "The model that we
> developed at the Technion is a significant step but there still
> remains a number of non-trivial open questions," he stresses. "It may
> be that some of these questions also will not be solved in the future.
> This is still not clear." 
> 
> As an example, he brings up the problem of instability according to
> which in spacetime with a time machine there could be disturbances
> with increasing strength so that spacetime would be disrupted to such
> an extent that it would cancel out the time machine. Prof. Ori, one of
> the few scientists in the world investigating this issue, hopes that
> continued research will present a clearer picture with respect to
> these questions. 

Why would any sentient want to go back in time?

Back to some time where fear and ignorance was running rampant.
Destiny, the future, a better understanding a better way to use our 
current resources towards a better world but also a better navigator on 
this space-ship earth, to the heavens and into the heart of the grandest 
and most magnificent journey.