Quote from: aero on 07/31/2015 02:28 am@SeeShells - https://drive.google.com/folderview?id=0B1XizxEfB23tfms4ZElWR0FXbzZ2a0E0aFkyNE1CTUF0NEwyOUU5amY3aG5BVUw3TldfN0E&usp=sharingSorry, I'm going to need to run it again, this time using a larger lattice with absorbing boundary layers. And figure out how to organize the image files. Putting them all in one big folder doesn't work as you can see.However, this data could be considered to represent the frustum operating in a very small perfect metal box. Energy leaks out through the antenna co-ax connection and bounces all over the place. (kind of like EW testing at ambient with the chamber door closed, only smaller.) I need to absorb the energy before it bounces off the edges of the lattice in order to represent an open test facility. Of course in the real world, your cavity will have other gaps, even if very small, but aren't you planning an open air test?As for data organization, what do you suggest? I have made cuts across the x axis at the big end and small end, and center cuts across the y and z axis for each of 14 time slices and 6 EM field components. I'm inclined to think that 24 folders would be best, each folder containing 14 time slices of one of 6 EM field components for one of the 4 cuts. These are the same cuts that I make for Dr. Rodal's use, and upload in a single file, but of course csv files are not very visual.I was afraid of the RF mess that putting the antenna through a hole and not sealing it off would cause and I dislike the asymmetrical mishmash of modes half generated. I think it would be wise to wait until we can get a square loop antenna to put in instead of eating up your computer time. Thanks for the work, it it as always greatly appreciated. Shell
@SeeShells - https://drive.google.com/folderview?id=0B1XizxEfB23tfms4ZElWR0FXbzZ2a0E0aFkyNE1CTUF0NEwyOUU5amY3aG5BVUw3TldfN0E&usp=sharingSorry, I'm going to need to run it again, this time using a larger lattice with absorbing boundary layers. And figure out how to organize the image files. Putting them all in one big folder doesn't work as you can see.However, this data could be considered to represent the frustum operating in a very small perfect metal box. Energy leaks out through the antenna co-ax connection and bounces all over the place. (kind of like EW testing at ambient with the chamber door closed, only smaller.) I need to absorb the energy before it bounces off the edges of the lattice in order to represent an open test facility. Of course in the real world, your cavity will have other gaps, even if very small, but aren't you planning an open air test?As for data organization, what do you suggest? I have made cuts across the x axis at the big end and small end, and center cuts across the y and z axis for each of 14 time slices and 6 EM field components. I'm inclined to think that 24 folders would be best, each folder containing 14 time slices of one of 6 EM field components for one of the 4 cuts. These are the same cuts that I make for Dr. Rodal's use, and upload in a single file, but of course csv files are not very visual.
Assuming 300N/kW
Quote from: wallofwolfstreet on 07/30/2015 08:39 pmQuote from: Star One on 07/30/2015 08:30 pmYou were quite happy to lecture a poster on here about doing further research. So I'll turn that around and suggest if you want to know the people with alternatives to dark matter theory that you do some research on the matter.It's not my job to justify your statements for you. If you feel their is some exodus of scientists away from dark matter or dark energy, prove it. I'm not going on some wild goose chase to learn about some fact I couldn't care less about. As a "fringe" man yourself (and I don't mean that in a disparaging way, just that you are interested in alternative theories), you know how many people believe a theory has no impact on whether or not it's true. I know this likewise, and so QuoteThere are an increasing number of scientists who are having doubts about the whole concept of Dark Matter/Energy. is irrelevant. But I figured I'd ask to see if you could rustle up the source you got that from, or if you just made it up on the spot. Such sources are easy to find should you have the mind to look.Study finds possible alternative explanation for dark energyHere's the article.http://m.phys.org/news/2014-12-alternative-explanation-dark-energy.htmlHere's the paper.http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0115550Here's one relating to Dark Matter.It’s crunch time for dark matter if WIMPs don’t showhttps://www.newscientist.com/article/mg22229712.600-its-crunch-time-for-dark-matter-if-wimps-dont-show
Quote from: Star One on 07/30/2015 08:30 pmYou were quite happy to lecture a poster on here about doing further research. So I'll turn that around and suggest if you want to know the people with alternatives to dark matter theory that you do some research on the matter.It's not my job to justify your statements for you. If you feel their is some exodus of scientists away from dark matter or dark energy, prove it. I'm not going on some wild goose chase to learn about some fact I couldn't care less about. As a "fringe" man yourself (and I don't mean that in a disparaging way, just that you are interested in alternative theories), you know how many people believe a theory has no impact on whether or not it's true. I know this likewise, and so QuoteThere are an increasing number of scientists who are having doubts about the whole concept of Dark Matter/Energy. is irrelevant. But I figured I'd ask to see if you could rustle up the source you got that from, or if you just made it up on the spot.
You were quite happy to lecture a poster on here about doing further research. So I'll turn that around and suggest if you want to know the people with alternatives to dark matter theory that you do some research on the matter.
There are an increasing number of scientists who are having doubts about the whole concept of Dark Matter/Energy.
Quote from: Star One on 07/31/2015 12:24 pmQuote from: wallofwolfstreet on 07/30/2015 08:39 pmQuote from: Star One on 07/30/2015 08:30 pmYou were quite happy to lecture a poster on here about doing further research. So I'll turn that around and suggest if you want to know the people with alternatives to dark matter theory that you do some research on the matter.It's not my job to justify your statements for you. If you feel their is some exodus of scientists away from dark matter or dark energy, prove it. I'm not going on some wild goose chase to learn about some fact I couldn't care less about. As a "fringe" man yourself (and I don't mean that in a disparaging way, just that you are interested in alternative theories), you know how many people believe a theory has no impact on whether or not it's true. I know this likewise, and so QuoteThere are an increasing number of scientists who are having doubts about the whole concept of Dark Matter/Energy. is irrelevant. But I figured I'd ask to see if you could rustle up the source you got that from, or if you just made it up on the spot. Such sources are easy to find should you have the mind to look.Study finds possible alternative explanation for dark energyHere's the article.http://m.phys.org/news/2014-12-alternative-explanation-dark-energy.htmlHere's the paper.http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0115550Here's one relating to Dark Matter.It’s crunch time for dark matter if WIMPs don’t showhttps://www.newscientist.com/article/mg22229712.600-its-crunch-time-for-dark-matter-if-wimps-dont-showC'mon. That wasn't an answer to my question and you know it. I know alternative explanations are out there. You can just read the wikipedia page for a brief introduction, simple as that.You wrote:QuoteThere are an increasing number of scientists who are having doubts about the whole concept of Dark Matter/Energy.Citing alternative theories doesn't justify that statement. You need to show a source that demonstrates more and more scientists are abandoning dark matter and energy for alternative theories, not just that alternative theories exist, which is self evident.
TT (or any other comments welcome), since you posted your idea of a TE preconditioning idea here is mine I've been thinking of for a few days but haven't had time to flesh it out but you can get the idea. Shell
I tried this yesterday, but failed miserably...here is the google+ page where you can see all my videos:https://plus.google.com/102151053813184986030/videos
Quote from: TheTraveller on 07/31/2015 11:54 amAssuming 300N/kWThat's your problem, right there.
Quote from: deltaMass on 07/31/2015 01:15 pmQuote from: TheTraveller on 07/31/2015 11:54 amAssuming 300N/kWThat's your problem, right there.Maybe, maybe not. Time will tell. At least I laid out the pathway from 4N/kW to 307N/kW. If Prof Yang's measured 4N/kW and Q = 1,531 for that 2010 wideband frustum is correct and the latest 2013 narrow band frustum design = Q of 117,500 and Specific Force scales with Q and Df, then 307N/kW is doable.So far, based on 8 data points, Specific Force seems to scale with Q.
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Kipreos, a molecular geneticist whose lab works on cell cycle regulation. Don't think this is better than the Lambda-CDM-model https://en.wikipedia.org/wiki/Lambda-CDM_modelThe universe has been expanding since the Big Bang. During inflation, it expanded much more. Why fight the concept of some expansion now when there was much more expansion during the inflation period? (at the cost of a preferred frame, as by Kipreos)
...http://forum.nasaspaceflight.com/index.php?topic=37642.msg1404523#msg1404523Why is vacuum Energie ^120 times to big?
For conservation of E & M folks, Dark Matter disappearing from theory is like saying Newton was a fraud, imo. The balancing force to gravity is labeled dark matter to explain the imbalance of forces.
Quote from: SeeShells on 07/31/2015 01:18 pmTT (or any other comments welcome), since you posted your idea of a TE preconditioning idea here is mine I've been thinking of for a few days but haven't had time to flesh it out but you can get the idea. ShellYes it is basic 101. Shell,Yes I understand your drawing. Will think about it.Mu idea is 100% traditional microwave 101 circular waveguide TE01 mode excitation tech.
It is deceptive to use the efficiency parameter (N/kW) when you see on Yang's graph's that when you increase power you end up with a way lower efficiency (720mN/2.5kW).What this shows that the thermal impact has a far bigger impact then you assume and that with and increased Q you're massing up gigantic power intensities in the resonance patterns.With needed Q's in the order of 10^10 i really doubt if cooled nitrogen will be able to keep the frustum walls cooled...IIRC, Shawyer talked about 17MW of stored energy in the cavity, by only using "700W to 1kW-ish" microwave generators and with a Q of barely 50k....Agreed, i'm no specialist in the matter, but it looks to me a near impossible engineering challenge, to pack all that in a minimal configuration, with a low enough weight to power ratio, so it can fly...IF the EMdrive ever turns out to be something (no hard evidence till today), it will be usable for orbit positioning, interplanetary travel and maybe interstellar probes...but terrestrial liftoff vehicles ? nah...The thermal degeneration on the Q is only going to grow the more power you put into it...at certain point, even supercooled liquids wont be enough to handle the thermal issues....
Quote from: TheTraveller on 07/31/2015 01:48 pmQuote from: deltaMass on 07/31/2015 01:15 pmQuote from: TheTraveller on 07/31/2015 11:54 amAssuming 300N/kWThat's your problem, right there.Maybe, maybe not. Time will tell. At least I laid out the pathway from 4N/kW to 307N/kW. If Prof Yang's measured 4N/kW and Q = 1,531 for that 2010 wideband frustum is correct and the latest 2013 narrow band frustum design = Q of 117,500 and Specific Force scales with Q and Df, then 307N/kW is doable.So far, based on 8 data points, Specific Force seems to scale with Q.It is deceptive to use the efficiency parameter (N/kW) when you see on Yang's graph's that when you increase power you end up with a way lower efficiency (720mN/2.5kW).What this shows that the thermal impact has a far bigger impact then you assume and that with and increased Q you're massing up gigantic power intensities in the resonance patterns.With needed Q's in the order of 10^10 i really doubt if cooled nitrogen will be able to keep the frustum walls cooled...IIRC, Shawyer talked about 17MW of stored energy in the cavity, by only using "700W to 1kW-ish" microwave generators and with a Q of barely 50k....Agreed, i'm no specialist in the matter, but it looks to me a near impossible engineering challenge, to pack all that in a minimal configuration, with a low enough weight to power ratio, so it can fly...IF the EMdrive ever turns out to be something (no hard evidence till today), it will be usable for orbit positioning, interplanetary travel and maybe interstellar probes...but terrestrial liftoff vehicles ? nah...The thermal degeneration on the Q is only going to grow the more power you put into it...at certain point, even supercooled liquids wont be enough to handle the thermal issues....