Your mileage may be relativistic,
Quote from: OnlyMe on 12/03/2017 11:46 pmWarpTech,Temperature as far as it depends on atomic/molecular vibration would not be affected by the velocity of any fast moving observer. In its simplest case the the observer would still see the vibration of the atom/molecule as a constant if not uniform change in velocity of the atom/molecule.For black body radiation the case may be made that depending on the fast moving observer’s velocity relative to the black body radiation, the observed “temperature” may go up or down, dependent upon whether the observer is moving toward or away from the radiating source. … But would that really have any affect on the radiating source or just velocity defined ‘boundary’ conditions affecting observation and measurement?There is a difference between Doppler shift and higher/lower temperature. Atoms have very well defined spectral lines. When moving toward or away, the entire spectrum is Doppler shifted. The same is true for time dilation. Whereas, if the temperature is increased or decreased, the spectrum doesn't shift. Increasing temperature just excites additional spectral lines in the atomic energy levels. The lower spectral lines are still there.
WarpTech,Temperature as far as it depends on atomic/molecular vibration would not be affected by the velocity of any fast moving observer. In its simplest case the the observer would still see the vibration of the atom/molecule as a constant if not uniform change in velocity of the atom/molecule.For black body radiation the case may be made that depending on the fast moving observer’s velocity relative to the black body radiation, the observed “temperature” may go up or down, dependent upon whether the observer is moving toward or away from the radiating source. … But would that really have any affect on the radiating source or just velocity defined ‘boundary’ conditions affecting observation and measurement?
Quote from: WarpTech on 12/04/2017 01:06 amQuote from: OnlyMe on 12/03/2017 11:46 pmWarpTech,Temperature as far as it depends on atomic/molecular vibration would not be affected by the velocity of any fast moving observer. In its simplest case the the observer would still see the vibration of the atom/molecule as a constant if not uniform change in velocity of the atom/molecule.For black body radiation the case may be made that depending on the fast moving observer’s velocity relative to the black body radiation, the observed “temperature” may go up or down, dependent upon whether the observer is moving toward or away from the radiating source. … But would that really have any affect on the radiating source or just velocity defined ‘boundary’ conditions affecting observation and measurement?There is a difference between Doppler shift and higher/lower temperature. Atoms have very well defined spectral lines. When moving toward or away, the entire spectrum is Doppler shifted. The same is true for time dilation. Whereas, if the temperature is increased or decreased, the spectrum doesn't shift. Increasing temperature just excites additional spectral lines in the atomic energy levels. The lower spectral lines are still there.I think there has been a miscommunication here. OnlyMe was discussing black body radiation, which is continuous across all frequencies unlike atomic spectral lines. As temperature increases, black body radiation increases at all frequencies and the peak of the distribution shifts as well.I believe that the Doppler shifted pattern will appear identical to the spectrum from a temperature shift, but since this depends on viewing angle, it does not define a new temperature for a moving object in another frame. This indicates that temperature is similar to rest mass in that as generally defined is meaningful in the rest frame. To really answer whether temperature is frame dependent many equations involving temperature may need to be reworked to remove implicit assumptions about the frame. There may be more than 1 right answer depending on how definitions are chosen.
Roger Shawyer has kindly sent me these as a good start point for emdrive design. Am posting them here to ensure they are available to experimenters.
Quote from: spupeng7 on 12/04/2017 01:49 amRoger Shawyer has kindly sent me these as a good start point for emdrive design. Am posting them here to ensure they are available to experimenters.It's very nice that Roger Shawyer has provided you references to antique measurement techniques.(...)
Also recommended by Roger Shawyer; 'Microwave Engineering Passive Circuits.' by Peter A Rizzi, Published by Prentice Hall.
I originally posted this in the Woodward effect thread but it seemed highly connected to this thread. Quote from: dustinthewind on 11/27/2017 07:09 pmSomething related to WarpTech's equations above ...Thanks WarpTechI suspect I may have connected the dots that describe how the EM drive is related to the Woodward effect. The magnetic field at the tip of the frustum, being up, is of greater magnitude than the magnetic field at the lower portion of the frustum, down. There is a dynamic effect that occurs when this happens. The magnetic fields in the EM drive when created may initially be at equilibrium but as energy rapidly builds in the frustum the equilibrium may shift to compress the magnetic field below as in the crushing of a spring. ...
Something related to WarpTech's equations above ...Thanks WarpTechI suspect I may have connected the dots that describe how the EM drive is related to the Woodward effect. The magnetic field at the tip of the frustum, being up, is of greater magnitude than the magnetic field at the lower portion of the frustum, down. There is a dynamic effect that occurs when this happens. The magnetic fields in the EM drive when created may initially be at equilibrium but as energy rapidly builds in the frustum the equilibrium may shift to compress the magnetic field below as in the crushing of a spring. ...
Dustinthewind,Warptech is headed in the right direction. Compare his equation on acceleration and change in acceleration to Woodward's. As to QVF, that is beyond the scope of Woodward's GR derivation. Quantum Mach Effects (QME) are considered at this point to be "minuscule". Even so, QME is worth exploring theoretically. The Mach Effect experimental device families (MET, MEGA) have asymmetric masses with a forced damped oscillator. Once resonance has been established, then timed electrical pulses add dielectric energy resulting in expansion of the material (PZT et al). GR Mach Effects (GRME) occur when a internal acceleration occurs collinearly within an external acceleration; GRME can also occur for a system at velocity (momentum) and an external change in force (jerk) is applied. This can be seen in both Woodward's derivation as well as Warptech's approach.ref: https://physics.fullerton.edu/~jimw/stargates.pdfWoodward derives in a paper preceding his book, MSAS-2013, a formula of the form...F = A a^2 + B j v where v is velocity, a is acceleration and j is the change in acceleration (jerk). F has units kg-m/sec^2 and a^2 and jv have units of m^2/sec^4A and B are constants. So A and B have units of kg-sec^2/mThis formula applies to straight-line free travel in flat space. One should consider time dependencies of m, v, a and j as well the additional challenges of the orbital mechanics of a flyby and traveling along gravitational geodesics.For applied Mach theory, you may also need to perform relativistic corrections for doppler effect and heat conduction among other things. IMHO the emDrive propulsion may be due in part to relativistic heat conduction.Since Woodward derives Mach theory from General Relativity, consider four-vector implications.Warptech does introduce four gradient. However, a comprehensive review of all four-vector physics is required eventually. From Wiki "Four vector", here is a nice checklist in the form of table of contents.4 Fundamental four-vectors 4.1 Four-position 4.2 Four-gradient5 Kinematics 5.1 Four-velocity 5.2 Four-acceleration6 Dynamics 6.1 Four-momentum 6.2 Four-force7 Thermodynamics 7.1 Four-heat flux 7.2 Four-baryon number flux 7.3 Four-entropy8 Electromagnetism 8.1 Four-current 8.2 Four-potential9 Waves 9.1 Four-frequency 9.2 Four-wavevector10 Quantum theory 10.1 Four-probability current 10.2 Four-spin11 Other formulations 11.1 Four-vectors in the algebra of physical space 11.2 Four-vectors in spacetime algebraThe rocket equation derivation I will need to examine closer. One would have to relate Q to the rocket equation to make sense of what Warptech is proposing.You mileage may be relativistic,David
While working on thermal management for the 30W RF amplifier, I utilized the down time and free space on the pendulum, to test whether vibrating devices can produce false-positive thrust results on a torsional pendulum. To my surprise, it turned out to be quite easy to generate "thrust" traces by vibrating a 40g stainless steel mass at various frequencies. Furthermore, physics-based simulations confirmed these results. My conclusion then was that a torsional pendulum is poorly suited for detecting minute amounts of thrust from vibrating devices. This is because when the contents of the device shift, the torsional pendulum beam reacts equally and oppositely. This has lead me to look more closely at "electrical hum" as a possible error source for some emdrive experiments. Most, if not all, RF amplifiers emit an audible hum when pushed at max RF power. In fact, my first 2W system produced a distinct hum that I would estimate was in the <100Hz range. As I run the new amplifier at ~80% capacity and use only 12.6V or less, that seems to have eliminated the electrical hum (from what I can hear). This is also why I am very interested in the US Navy's contactless RF connection and Peter Lauwer's method. I do not think Shawyer's frictionless air track is vulnerable to the same reaction problem as a torsional pendulum, as it can show an acceleration curve over a certain distance. However, air tracks can be tricked in other ways. I have one more series of tests to conduct using the asymmetric shaker, which includes a number of frequencies in sine, square, and sawtooth waveform - as well as some chirps. Once that is finished in the next few days, I will switch back over to the emdrive and resume testing there. But while the emdrive is sitting on the workbench, I would like to record a video to show how the cavity tuning system works as I think that's pretty neat. Sorry for the delay, but it has been a fun diversion and the data collected will be useful.
While working on thermal management for the 30W RF amplifier, I utilized the down time and free space on the pendulum, to test whether vibrating devices can produce false-positive thrust results on a torsional pendulum. To my surprise, it turned out to be quite easy to generate "thrust" traces by vibrating a 40g stainless steel mass at various frequencies. Furthermore, physics-based simulations confirmed these results. My conclusion then was that a torsional pendulum is poorly suited for detecting minute amounts of thrust from vibrating devices. This is because when the contents of the device shift, the torsional pendulum beam reacts equally and oppositely.
While working on thermal management for the 30W RF amplifier, I utilized the down time and free space on the pendulum, to test whether vibrating devices can produce false-positive thrust results on a torsional pendulum. To my surprise, it turned out to be quite easy to generate "thrust" traces by vibrating a 40g stainless steel mass at various frequencies. Furthermore, physics-based simulations confirmed these results. My conclusion then was that a torsional pendulum is poorly suited for detecting minute amounts of thrust from vibrating devices. This is because when the contents of the device shift, the torsional pendulum beam reacts equally and oppositely. ...
Quote from: Monomorphic on 12/05/2017 11:38 am.... test whether vibrating devices can produce false-positive thrust results on a torsional pendulum. ... Hello, your experiment is very rigorous, but I suggest you use the air suspension platform as an experimental vehicle as soon as possible.
.... test whether vibrating devices can produce false-positive thrust results on a torsional pendulum. ...
Quote from: oyzw on 12/06/2017 12:29 amQuote from: Monomorphic on 12/05/2017 11:38 am.... test whether vibrating devices can produce false-positive thrust results on a torsional pendulum. ... Hello, your experiment is very rigorous, but I suggest you use the air suspension platform as an experimental vehicle as soon as possible.O, no, he shouldn't. The air suspension platforms are very unreliable instruments to work with. For critiques, see, e.g., Marc Millis, Nonviable mechanical “antigravity devices, in: M.G. Millis and E.W. Davis (eds.), Frontiers of propulsion science, AIAA, 2009, pp. 249–261.
Has someone information about; when videos and proceedings of the conference from november this year will be available here or at ssi.org?I'm just curious about it.Thanks