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Noel Coughlin is a highly analytical researcher who has been in process of relating Synergetics with electromagnetism ever since he graduated, a project that has been his driving motivation since a discussion he had with Arthur Young, who was the only student of Oswald Veblen, who was the only teacher of relativistic theory at Princeton in 1925.
In summary, Synergetics proposes that all existing elementary particles and atomic structures in the universe would be assemblies of close packed tetrahedral structures, each inscribed within an enclosing sphere and whose vectorial dimensions would reduce to isometric unity if their energy was decrease to absolute zero. It is from these assumed pre-time, pre-space potential isometric structures that all constants, frequencies and characteristics of elementary particles surprisingly emerge from vector sums of these tetrahedral assemblies; which constants and elementary particles characteristics are now experimentally confirmed and accounted for by electromagnetic mechanics of elementary particles.
Of particular interest is Fuller's Fig. 522.09 that Noel related to the increasing intensity of electromagnetic energy with increasing frequency while systematically all moving at the constant velocity of light in vacuum.
Here is a link to a recent video in which he explains the general outlines of his synthesis in a conversation with Daniel Ari Friedman.
Noel's email address is noel_coughlin01@yahoo.com in case anyone wishes to communicate with him to discuss these issues with him.
An introduction to Noel's recent videos and to his YouTube channel is provided here:
And also at the top of the Electromagnetic Mechanics Project Index:
All opinions and contributions are welcome.
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Fuller defined synergetics as follows (Ref: http://www.rwgrayprojects.com/synergetics/s02/p0000.html):
"A system of mensuration employing 60-degree vectorial coordination comprehensive to both physics and chemistry, and to both arithmetic and geometry, in rational whole numbers ... Synergetics explains much that has not been previously illuminated ... Synergetics follows the cosmic logic of the structural mathematics strategies of nature, which employ the paired sets of the six angular degrees of freedom, frequencies, and vectorially economical actions and their multi-alternative, equi-economical action options ... Synergetics discloses the excruciating awkwardness characterizing present-day mathematical treatment of the interrelationships of the independent scientific disciplines as originally occasioned by their mutual and separate lacks of awareness of the existence of a comprehensive, rational, coordinating system inherent in nature."
In summary, Synergetics proposes that all elementary particles and atomic structures existing in the universe could be represented by assemblies of close packed tetrahedral structures, each tetrahedron inscribed in an enclosing sphere, whose vectorial dimensions would reduce to isometric unity if their energy was reduced to absolute zero, and whose vertices would then all touch each other through the symbolic walls of the spheres. It is from this idealized configuration of the carbon atom, with its four valance electrons established as the vertices of an idealized tetrahedron circumscribed in en enclosing sphere that the Carbon-60 spherical molecule was discovered in 1985, inspired Buckminster Fuller's research, that was given his name to honor his contribution.
It is from these idealized potential isometric structures, that would predate time and space, that physical constants, frequencies and other characteristics of elementary electromagnetic particles surprisingly emerge from vector sums of assemblies of these close packed spheres each enclosing a tetrahedron. These constants and characteristics of elementary particles have now been experimentally confirmed, and their electromagnetic structures and interactions at the subatomic level of magnitude are now described by the electromagnetic mechanics of elementary particles
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Noel Coughlin succeeded in relating the trispatial mechanics of electromgnetic elementary particles to Buckminster Fuller's Synergetics, then establishing a unified theory.
Summarily explained in a recent presentation:
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IEEE 2024 8th International Conference on Electrical, Mechanical and Computer Engineering (ICEMCE 2024) will be held on October 25-27, 2024 in Xi'an, China.
Conference Website: https://ais.cn/u/baUBfa
---Call for papers---
The topics of interest for submission include, but are not limited to:
· Smart grid
· Heat exchanger
· Computer simulation
· Artificial intelligence (AI)
· Computer modeling
· Mobile computing
· Instruments and meters
· Power and fluid machinery
· Heat and mass transfer
· Laser processing technology
· Wireless sensor networks
· Electric energy processing
· Electromagnetism and photonics
· Power quality and system stability analysis
· Photoelectric effect of semiconductors
· Refrigeration and air conditioning
......
---Publication---
All accepted papers will be submitted to IEEE (ISBN: 979-8-3315-0623-0) for publication, and it will be submitted to IEEE Xplore, EI Compendex and Scopus for indexing.
---Important Dates---
Full Paper Submission Date: September 30, 2024
Registration Deadline: October 18, 2024
Final Paper Submission Date: October 18, 2024
Conference Dates: October 25-27, 2024
--- Paper Submission---
Please send the full paper(word+pdf) to Submission System:
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I'm interested...
I would appreciate any information regarding key dates. And to know how much is involved.
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Accelerated Expansion a Fallacy
  • August 2024
  • Advances in Theoretical & Computational Physics 7(3):1-62
This is one of the many papers that used logspiral photon propagation and a lightspeed expanding hyperspherical hypersurface universe. It does not include my work or Dr. Tuomo Suntola's papers as prior art.
Dr. Pommerenke states that he calculated the Hubble's Constant from the partial list of SN1a data. That does not make sense because a logspiral light propagation (at constant angle with respect to the radial direction) will always produce the same wavelength polarization as it propagates.
In other words, neither Dr. Suntola's (uses logspiral with 45 degrees) nor Dr. Pommerenke's work (different constant angle) can produce ANY redshift.
It also uses Planck lengths. As you might know, Planck Lenght and Planck Units are model-dependent. In other words, in their definition, there is an implicit model. That creates tautologies or circular reasoning, which are oftentimes taken as "Amazing Discoveries with Infinite Precision." by crackpots like the iSpacetime fellow.
This model seems to use Euclidean 4D Spatial Manifold. Of course, that fails to replicate Relativity successes. I say that because one has to derive Gravitation (as I did) to be able to replicate Gravitational Lensing and Mercury Perihelion Precession.
So, I do have strong criticism, which I hope will help Dr. Pommerenke improve his model or determine whether it contributes to Science.
Please, feel free to ask questions, offer suggestions, or object to my objections.
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No ! It's about your sick mind... not to forget your helpless dogmatization...
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In cases where the rotational of the magnetic field H is zero, we can define this field as the gradient of a scalar function defined as the magnetic scalar potential (similar to the electric potential). What is the physical meaning of this magnitude?
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Your question touches on a significant aspect of electromagnetic theory. The magnetic vector potential A is often viewed as an abstract quantity that simplifies the solution of Maxwell's equations. However, James Clerk Maxwell himself saw deeper physical meaning in it. Maxwell proposed that the magnetic vector potential A could be interpreted as "momentum per unit charge." This interpretation aligns with his broader work in unifying electricity and magnetism, showing that electric and magnetic fields are different manifestations of the same phenomenon.
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Here are a few thoughts of mine that say space can't be curved because it doesn't exist. What we call space is actually the ubiquitous presence of gravitons and photons. Light passing the Sun is refracted because these particles follow curved paths. This naturally means the virtual particles currently theorized to fill space don't exist (only gravitons and photons do).
This might mean (a) gravity and electromagnetism can undergo a particular interaction to form particles with mass (this is supported by Einstein's publication in 1919 of an article suggesting gravity plays a role in the composition of elementary particles), and (b) space, while filled with gravitons and photons, is the absence of the mass-generating interaction.
However, it’s very convenient to simply speak of curved space – just as we say the Sun rises and sets while neglecting to mention Earth’s rotation … or speak of waves travelling without referring to the lack of horizontal propagation - photons merely "bob up and down" like particles of water. Electromagnetism would be caused by a travelling gravitational wave causing excitation of pre-existing photons (either in so-called "space" or in masses like atoms and objects).
Consistent with the unity of space and time, time could be something built into gravitons and photons. I believe these particles (what we call "space") are built from binary digits and topology immersed in the 3rd dimension, that they interact to form mass by a process I call vector-tensor-scalar geometry, and that the 4th dimension of "time" which is built into the particles is the real plus imaginary numbers of Wick rotation.
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Interesting thoughts! There's another perspective to consider: spacetime might actually emerge from a network of quantum entanglements.
Instead of space being filled with particles like gravitons and photons, imagine spacetime as a fabric woven from the connections between entangled particles. These quantum connections create the geometric properties of spacetime, such as curvature.
In this view, distance isn't just empty space but the result of differences in this entanglement network. When light bends around the Sun, it's following the geometry shaped by these quantum interactions.
This means space doesn't exist as an independent entity—it's a manifestation of these deeper connections. This idea aligns with modern quantum gravity theories, where spacetime and gravity emerge from quantum information.
So, rather than needing gravitons, it's the structure of entanglement that shapes what we perceive as spacetime. It's a bit like how we talk about waves traveling without focusing on the medium—it's the underlying connections that matter.
Hope this adds another layer to the discussion!
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Given we have knowledge of only 5% of the Universe, can this and the 95% remainder of the Universe including Dark Energy and Dark Matter be understood with a single paradigm shift.
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In light of my recent research, detailed in the paper "Dark Matter is Just Gravity, Only Normal Matter is the Truth," published in the Indian Journal of Advanced Physics, I argue that what we refer to as dark matter can be explained through normal gravitational effects of ordinary matter. This perspective suggests that our current understanding of dark matter might be incomplete and that gravitational interactions could account for phenomena attributed to dark matter.
Furthermore, my forthcoming research extends this idea to dark energy, proposing that it too might be explained through phenomena we already understand but have not yet fully integrated into our models. By re-evaluating these cosmic forces through familiar physical principles, we might achieve a more unified understanding of the universe.
The idea of a single paradigm shift encompassing both dark matter and dark energy is intriguing. Such a shift could involve integrating these revised concepts into a broader framework that accommodates both gravitational effects and the expansive forces currently labeled as dark energy. This approach would not only address the mysteries of dark matter and dark energy but also potentially reshape our fundamental understanding of the universe.
I invite the ResearchGate community to discuss the potential for such a paradigm shift. Could integrating new findings on dark matter and dark energy lead to a more comprehensive model of the universe? What would such a unified framework look like, and how might it impact our current theories?
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To date the presence of Dark Energy, has remained a mystery. This is solved on the basis of fundamental unit of energy, Planck's constant, from which space-time itself, the forces of nature including gravity, and all particle physics can be derived. This is achieved on the on the basis of the speed of light and classical geometry. In the first instance new research points to a definitive answer to the presence of space time and the value of Hubble's constant. Here we invite open access research and discussion to probe the mysteries and very nature of Dark Energy, and the origins of all the aspects of Nature including the laws of thermodynamics.
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Theories which imply a violation of conservation laws are irrelevant by default. There is no specific proof necessary.
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There is usually airgap between a radiating element and metasurface and I want to calculate the phase delay analytically. Like what is the reflecting phase from the meta? What is the phase delay from the metasurface to the antenna?
Thanks in advance.
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Hello,
A few papers are attached for help.
Thanks,
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Dark Energy constitutes 70% of the entire energy of the Universe and until now has remained a mystery. In this discussion we resolve the nature of what dark energy is from the fundamental quantum oscillator known as Harmonic Quintessence
This can be used too derive Hubble's constant from geometrical first principles and is capable of also explaining the nature of space time itself and the continued expansion of the Universe
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Dark energy isn't any mystery, it can be described by assigning a positive value to the cosmological constant, that's as part of classical gravity as Newton's constant.
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Einstein field equation, assuming a weak gravitational field or reasonably flat spacetime, are analog to Maxwell's equations for electromagnetism.
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If you haven't done so already, I recommend you take a look at "Gravitation and Cogravitation" by Oleg D. Jefimenko (ISBN 0-917406-15-X - paperback). This contains derivations of the Maxwell-like equations for (weak) gravitational fields and discusses examples. I myself have been able to derive the correct result for the perihelion precession of Mercury using these gravitoelectromagnetic equations despite the fact that Jefimenko obtained the wrong value in his book (!).
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Using the Holographic Principle’s idea that the universe is a computer simulation, I’d suggest that, in reality, there is no separation at all between anything in space or anything in time. Everything could be compared to the onscreen world of a video game. Things appear separate in both time and space but everything’s actually connected by the binary digits of 1 and 0 – even classical physics and quantum physics are connected. All couplings can be instantly quantum entangled and bypass the speed of light because the equations of James Clerk Maxwell allow the existence of both “retarded” waves traveling forwards in time and “advanced” waves going back in time. Advanced waves aren’t popular with scientists since they seem to violate cause and effect. But if time is compared to a DVD, the entire disk exists at any moment and we can say everything happens at once (this is consistent with no separation existing). Us puny humans are spared from the confusion we’d feel at everything occurring simultaneously. This results from our consciousness substituting for the laser which reads the DVD. Just as the laser only permits the sights and sounds of very brief fractions of a second to be displayed at a given moment, the mind can’t be aware of all events happening at once but only of an infinitesimal fraction of the sights and sounds on the “Cosmic DVD”.
As for the weirdness of wave-particle duality - According to Special Relativity, experiments are overrated by modern science since the truths revealed by experimentation are necessarily restricted to one frame of reference. Regarding the question of length contraction in Special Relativity - Einstein wrote in 1911 that "It doesn't 'really' exist, in so far as it doesn't exist for a co-moving observer; though it 'really' exists, i.e. in such a way that it could be demonstrated in principle by physical means by a non-comoving observer."
(Einstein [1911]. "Zum Ehrenfestschen Paradoxon. Eine Bemerkung zu V. Variĉaks Aufsatz". Physikalische Zeitschrift 12: 509–510)
Demonstration "in principle by physical means by a non-comoving observer" is the same meaning as "demonstration by experiments performed by scientists not moving at the speed of light".
Now relate the previous paragraph to this quote - “While an observer stationary with respect to an electric charge will see it as a source of electric field only, a second observer moving relative to the first will see the same charge as a source of both electric and magnetic fields in a way dictated by special relativity.” (Penguin Encyclopedia 2006 - edited by David Crystal - 3rdedition, 2006 - ‘electromagnetism’, p. 443)
So, we need to revise Maxwell’s propagation of electromagnetism by oscillating electric and magnetic fields. George Yuri Rainich showed in 1925
(Electrodynamics in the general relativity theory. by G. Y. Rainich. Trans. Amer. Math. Soc. 27 (1925), 106-136 https://www.ams.org/journals/tran/1925-027-01/S0002-9947-1925-1501302-6/)
that Einstein’s gravitational equations contain enough information about Maxwell’s electromagnetic equations to make it plausible that gravitational waves also possess an advanced component. In addition to electric-magnetic duality not existing, the unification of all things in space and time means wave-particle duality would not exist in all frames of reference. It would only exist for a non-comoving observer: it could be demonstrated “… by experiments performed by scientists not moving at the speed of light". If looked at from the frame of reference of an observer co-moving with the universe (in tune with it), the weirdness of wave-particle duality vanishes and quantum mechanics becomes as understandable as the macroscopic world.
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A paper showing additional ways the equtions of quantum mechanics must change at relativistic velocities:
Proofs of the Axial & Gravitational Doppler Shifts Changes Observed Time, Distance and Constants
By Samuel Lewis Reich, 12/10/2023
Abstract:
Proofs that ALL Doppler shifts (NOT just the transverse) change observed time and distance is given by link. It is a fixable big omission in relativity.
That result leads to (for things with rest mass) some basic constants of equations being variables of velocity and angle (at relativistic velocities). Proofs of this given in a different link.
The final link shows a common omission in the analysis of relativistic beams.
Key words: Doppler, relativity, constants, gravitational fields, electric fields, Schrodinger’s equation, uncertainty equations, Planks constant, high energy beams
Proofs:
There is an omission in relativity. The links to proofs of that omission: the axial and gravitational axial shifts change observed time and distance, not only transverse does.-----------
If Ra is axial shift frequency (f’/f) ratio and Rt the transverse shift frequency ratio it will assumed the total shift is Rs=RaRt. Because the equations of each is well known experimentally proven and independent, and always above or equal to one. Ra=1+{(v/c) cos q] and Rt=[1-(v/c)2 ]1/2 . Where q is the angle between v and a line from the source to the observer.
A less mathematical proof that that the axial Doppler shift affects observed time and is a property of distance and time not any medium:
Take a small source producing waves on a water’s surface with some encoded signal. Have a stationary balloon above it with a laser range finder pointing down above it and near by a airplane with identical range finder set up moving at some velocity v less than that of the waves.
For the case of the airplane moving toward the source: The airplane will observe more of the in encoded signal in a time t than the balloon. Time is passing faster in airplane. For the case of the airplane moving away from the source: The airplane will observe less of the in encoded signal in a time t than the balloon. Time is passing slower in airplane. If c is taken as the velocity the waves (not light) and v the velocity of the airplane, fa/fo=1+(v/c) and ta/to=1/[1+v/c)] where fa and ta are the frequency and time in airplane and to and fo that in the ballon. Note they same form as that of Doppler shifts of light although different physically.
Therefore, the formulas for axial shifts are properties of distance and time not mediums. Also, axial Doppler shift changes observed time.
The proofs should be considered an addition to relativity and not a disproof. The axial shift effect is gone at transverse windows of acceptance of instruments and averages to zero at random angles of acceptance, Therefore, experiments to prove the results of the above or following must be non-transverse and limited range angle.
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A link to the effect of high velocities on flux of beams:---------------------
A link to a proof that most important constants of physics change at relativistic velocities----------------
In theory h could be replace by a variable of velocity and orientation found by curve fitting the equation in question at 4 or 5 points between 0.2 and 0.8 time the speed of light. But a particle moving at such velocities generates noise. The noise is made by the particle giving energy to standing waves and reflections its moving fields (which can be nonlinear). In the Schrodinger equation one is solving for the wave function which is a probability. The uncertainty equations also probability functions which require many trails for curve fitting.
Results:
All Doppler shifts change observed time and distance (not just the transverse shift). At least some of the constants of well-known equations become variables of velocity and orientation at relativistic velocities of things with rest mass.
Thank you for your time.
Samuel Lewis Reich (sLrch53@gmail.com)
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If magnetic monopoles do not annihilate*, do magnetic monopoles still exist?
If magnetic monopoles do not exist, how should magnetism be described? Is it a bipolar magnetic charge?
If it is a bipolar magnetic charge, how can it exist, and what should be its relationship to a unipolar charge?
The understanding of magnetism has a very long history[2], but to this day we are still searching for what is at the root of magnetism[3], as well as trying to explain what the force of magnetism actually is, for example, facing difficulties with the explanation of the Meissner Effect[4].The MoEDAL-Collaboration† [6] , a scientific project dedicated to the search for monopole[8] and dyon‡[9] , to upgrade the original TeV scale energy levels to the GUT scale in 2022[7] .
There have been many ideas about the origin of magnetism, from the earliest Amperian (infinitesimal current loops) [10], the Gilbertian (infinitesimally short magnetic needles), spinning charged sphere[ edit 11]; the ultimate magnetic particle, the elementary magnet, the electron itself spinning like a tiny gyroscope [12], rotation of a ring-shaped negative charge [13], until W. Gerlach and O. Stern experimentally discovered the existence of a magnetic moment in the electron [19], followed by Pauli [14], R. d. L. Kronig [15], G. E. Uhlenbeck and Samuel Goudsmit [16] who defined the concept of an intronic electron spin, explaining the anomalous Zeeman effect. However, we still do not have an answer to the question of what exactly spin is [17], whether magnetism originates from a magnetic charge symmetric to the electric charge, and whether there exists a magnetic monopole symmetric to the electron.
The concept of magnetic monopoles was first introduced by Dirac, who called them "nodal lines" [18], and later gave the quantization condition for electric charge: eg=1/2(nhc). The interpretation is that magnetic charge must accompany electric charge. However there are numerous ideas about magnetic monopoles [7], indicating that our knowledge of it is still uncertain.
Our question is:
In reality we do not find any signs of the existence of magnetic monopoles, all we find are two poles of magnetism, this is true for microscopic electron particles and also for macroscopic electromagnets. The two poles of magnetism coexist in one body and never separate. It is impossible for a mechanism to exist here that would bond positive and negative magnetic monopoles together without causing them to cancel each other out. Nor can there exist a bipolar field that is both positive and negative at one point. Therefore, there can only exist a rational model that still resembles a current ring with a unipolar magnetic field traversing it. This appears to constitute two opposite poles on both sides of the ring.
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Notes
* Weinberg addressed three puzzles, flatness, horizon and magnetic monopoles, in his account of the cosmic inflation in the book [1]. When talking about magnetic monopoles, it is argued that there was a magnetic monopole/photon ratio at the beginning of the Big Bang, which assumes a condition "if magnetic monopoles do not annihilate each other". This assumption triggered the topic.
† the Monopole and Exotics Detector at the LHC.
‡ dyon is a Magnetic Model of Matter proposed by Schwinger, which carries both electric and magnetic charges.
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References
[1] Weinberg, S. (2008). COSMOLOGY, Oxford University Press. Chinese version, p162;
[2] Milton, K. A. (2006). "Theoretical and experimental status of magnetic monopoles." Reports on Progress in Physics 69(6): 1637.
[3] J.Stohr, H. C. S. (2006). Magnetism: From Fundamentals to Nanoscale Dynamics, Higher Education Press.
[4] Kozhevnikov, V. (2021). "Meissner Effect: History of Development and Novel Aspects." Journal of Superconductivity and Novel Magnetism 34(8): 1979-2009.
[5] . "MoEDAL (the Monopole and Exotics Detector at the LHC) ".
[6] Acharya, B., J. Alexandre, P. Benes, K. S. Babu and etl. (2021). "First Search for Dyons with the Full MoEDAL Trapping Detector in 13 TeV p p Collisions." Physical Review Letters 126(7): 071801.
[7] MoEDAL-Collaboration and V. A. Mitsou (2022). "MoEDAL, MAPP and future endeavours."
[8] Preskill, J. (1984). "Magnetic monopoles." Annual Review of Nuclear and Particle Science 34(1): 461-530.
[9] Schwinger, J. (1969). "A Magnetic Model of Matter: A speculation probes deep within the structure of nuclear particles and predicts a new form of matter." Science 165(3895): 757-761.
[10] Maxwell, J. C. (1873). A treatise on electricity and magnetism (电磁通论), Beijing University Press (Clarendon press) 2010.
[11] Fahy, S. and C. O'Sullivan (2022). "All magnetic phenomena are NOT due to electric charges in motion." American Journal of Physics 90, 7 (2022).
[12] Compton, A. H. and O. Rognley (1920). "Is the Atom the Ultimate Magnetic Particle?" Physical Review 16(5): 464-476.
[13] Parson, A. L. (1915). "A magneton theory of the structure of the atom (with two plates)." Smithsonian Miscellaneous Collections.
[14] Pauli, W. (1925). "On the connexion between the completion of electron groups in an atom with the complex structure of spectra." Zeitschrift für Physik 31 (1925): 765.
[15] Kronig, R. D. L. (1926). "Spinning Electrons and the Structure of Spectra." Nature 117(2946): 550-550.
[16] Uhlenbeck, G. E., and Samuel Goudsmit. (1925). "Ersetzung der Hypothese vom unmechanischen Zwang durch eine Forderung bezüglich des inneren Verhaltens jedes einzelnen Elektrons." Die Naturwissenschaften 13.47 (1925): 953-954.
[17] Chian Fan, et al. (2023). "Is the spin of an electron really spin?", from https://www.researchgate.net/post/No9_Is_the_spin_of_an_electron_really_spin.
[18] Dirac, P. A. M. (1931). "Quantised singularities in the electromagnetic field." Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character 133(821): 60-72.
[19] Gerlach, W. and O. Stern. (1922). "Der experimentelle Nachweis der Richtungsquantelung im Magnetfeld.
." Zeitschrift f¨ur Physik 9: 349-352.
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Dear Chian Fan
We have the experimental proof that magnetic monopoles do exist, and that in fact, electrons are magnetic monopoles at any given moment. When 2 electrons couple in least action anti-parallel pairs to fill orbitals or to associate atoms via covalent bound, or establish Cooper pairs, they do not annihilate each other. The lab experimental proof of the possibility was made in 1998, published in 2013 and confirmed with real electrons one year later in 2014 by Kotler et al.
Explained and analyzed in Sections 10 and 11 of this recent article:
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If I connected my voltmeter leads across the left-hand crossbar in the top figure, the voltmeter would presumably read an e.m.f of "E"?
But then, what would my voltmeter read for the left-hand crossbar in middle and bottom figures?
Also what is the Relativistic expression for the emf in the moving crossbar?
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Below we have a straight-wire "crossbar" and a U-shaped wire. A uniform magnetic field B is directed out of the paper.
Here, in the top figure, with the crossbar moving to the left, touching the U-shaped wire, we have, by the relation (v x B), an emf appearing across the left-hand crossbar, as indicated.
In the middle figure, with an observer moving in concert with the moving crossbar, we have, by the relation (v x B), an emf appearing across the right-hand crossbar.
In the lower figure, with an observer moving to the left, at half the rate of the left-hand crossbar, we have, by (v x B), an emf appearing across both right and left hand crossbars.
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Dear Professor Tombe,
That's true. I believe Einstein was well aware of this, but, the way out of these difficulties (ie. the ones Dingle highlighted,) was opaque to him, just as it is opaque to everyone else.
In my view the Minkowski space-time framework is valid, (especially as arrived at by A A Robb,) but it's more a description of the odd behaviour of light, in the presence of mankind, than anything else.
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A series of samarium-cadmium co-substituted hexaferrites, represented by the formula Ba2-xSmxCo2CdyFe28-yO46, were synthesized through a straightforward heat treatment method at 1340 °C. Characterization of the samples involved various techniques such as FTIR, XRD, SEM, VSM, Mӧssbauer, and low-frequency dielectric measurements. XRD analysis revealed the dominant presence of the desired phase (denoted as X) alongside hematite. The magnetic saturation (MS) ranged from 67.01 Am2/kg to 50.43 Am2/kg, while coercivity (Hc) varied from 2.95 kA/m to 6.17 kA/m. The pure sample exhibited a notably high MS value (67.01 Am2/kg), while the composition with x = 0.06, y = 0.3 displayed a remarkably low Hc value (2.95 kA/m), indicating potential applications in electromagnets, transformer cores, and electric motors. However, the Mr/Ms ratio below 0.5 affirmed the multi-domain nature of the hexaferrites. Hysteresis loops of all samples demonstrated narrow characteristics, confirming their magnetically soft nature. Mössbauer spectra of selected samples (S1, S3, and S5) exhibited doublets. The observed low values of coercivity, retentivity, and loss tangent in samarium-cadmium substituted samples suggested their suitability for lossless low-frequency applications.
#hexaferrites
#characterizations
#materialsynthesis
#scientificresearch
#materialscience
#electromagnets
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Good
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In our investigation, we synthesized hexaferrites with X-type samarium-cadmium co-substitution (Ba2-xSmxCo2CdyFe28-yO46) through a straightforward heat treatment at 1340 °C. Characterization via FTIR, XRD, SEM, VSM, Mössbauer, and low-frequency dielectric measurements revealed a blend of the X phase and hematite in the samples.
Magnetic properties showed variations in saturation magnetization (MS) from 67.01 Am2/kg to 50.43 Am2/kg and coercivity (Hc) from 2.95 kA/m to 6.17 kA/m. Notably, the pure sample exhibited high MS (67.01 Am2/kg), and the composition with x = 0.06, y = 0.3 displayed low Hc (2.95 kA/m), indicating a multi-domain nature.
Hysteresis loops suggested the samples as magnetically soft materials, and Mössbauer spectra revealed doublets in selected samples. The low coercivity, retentivity, and loss tangent in Sm–Cd substituted samples suggest potential applications in electromagnets, transformer cores, electric motors, and as candidates for lossless low-frequency applications.
#Innovation
#MaterialsScience
#Research
#Hexaferrite
#Electromagnets
#LowFrequencyApplications
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Nice work
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General relativity and quantum mechanics unite when gravitational and electromagnetic waves produce all forms of mass in planets and black holes, every fermion and boson in the Standard Model of particle physics, and (in stars) quantum-entangled waves which amplify each other’s energy transference as well as synthesizing the stellar hydrogen and other chemical elements.
Einstein's statement that space (more precisely, space-time) is curved is an overgeneralization. He set this conclusion in motion himself in 1919 when he published his article "Do gravitational fields play an essential role in the structure of elementary particles?" His paper inspired my theory called Vector-Tensor-Scalar Geometry - explained in the attached (updated) article.
VTS geometry means (a) gravity and electromagnetism can undergo a particular interaction to form particles with mass, and (b) space, while filled with gravitons and photons, is nothing but the absence of the mass-generating interaction. There can be no curvature of something that has no existence itself. The phrase "curvature of space" would technically mean "gravitons and photons filling space follow curved paths". However, it’s very convenient to simply speak of curved space – just as we say the Sun rises and sets while neglecting to mention Earth’s rotation … or speak of waves travelling without referring to excitation of pre-existing gravitons or photons in space and mass by a space-time disturbance (a gravitational wave) travelling at the speed of light.
How can the gravitons and photons filling space follow curved paths? This requires the universe to be intelligently designed. In purely linear time, the designer would be God. In Einstein's nonlinear time (developed from Riemannian geometry's framework for modelling nonlinear data) is the implication of the possibility of the designer being future scientists who use this curvilinear time to interact with what we call the past and present.
To return to the question "How can the gravitons and photons filling space follow curved paths?" Waves can not only be described by mathematics but, according to this post, they can literally be the result of maths. Then, Fourier analysis or v=f.(lambda) would not merely be descriptions of waves created by interacting particles. In conjunction with base 2 maths aka binary digits, and topology, they’d be part of the “blueprint” for forming waves which, via VTS geometry, produce particles. Interacting particles can produce waves just as masses can curve spacetime to create gravitation and gravitational waves. VTS plausibly explains the inverse – it doesn’t regard mass as the producer of gravity but regards gravity, partnering with electromagnetism, as producer of mass. Inverting quantum mechanics, the inverse law states that waves produce particles.
A one-dimensional line is a set of points obeying a linear relationship. A point’s an exact position or location. It’s important to understand that a point is not a thing, but a place. It possesses zero size and no matter how far we zoomed in, it’d remain dimensionless with no width. Instead of programming a set of points to follow a straight line, suppose they’re represented curvilinearly as a waveform described by Fourier analysis or v = f. lambda
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Space-time consists of two layers: chord (tonality) space-time and non-chord (atonality) space-time; The former is expressed by chords (quantum spectrum, strings) and is often used in music, painting, etc. The latter masks the chord, is expressed by an external reference frame (clock, ruler, etc.), and is often used in classical physics, etc. Both layers involve the figure-ground and motion categories.
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Establishing "gravity electromagnetism" similar to Oliver Heaviside, is his theory of gravity no better oriented than Einstein's theory of relativity? More natural, more rational. "The speed of light doesn't change" is too weird, too supernatural.
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“…Establishing "gravity electromagnetism" similar to Oliver Heaviside, is his theory of gravity no better oriented than Einstein's theory of relativity? More natural, more rational….”
- in that above that some theory of Gravity that would be similar to classical electrodynamics would also be more natural, more rational than the GR is quite correct, Gravity fundamentally is nothing else than the “fourth” fundamental Nature force – as that the Electric Force is, while, as that is rigorously scientifically proven in the in the Shevchenko-Tokarevsky’s informational physical model, 3 main papers are
- the postulated in the GR as real interactions in systems “mass-spacetime-mass” fundamentally cannot, and so don’t exist.
Though the wording "gravity electromagnetism" looks as rather vague one, Gravity and Electric Forces are fundamentally different Forces, and so any "gravity electromagnetism" fundamentally doesn’t exist. However yeah, the Forces are rather similar, and so the “gravitomagnetic” force well probably exists at motion of gravitational charges – “gravitational masses”.
And that
"…The speed of light doesn't change" is too weird, too supernatural.….”
- is really a vague wording. The “speed of light” is real fundamental constant in Matter, since everything in Matter is/are some disturbances in the Matter’s the Matter’s ultimate base – the (at least) [4+4+1]4D dense lattice of primary elementary logical structures – (at least) [4+4+1]4D binary reversible fundamental logical elements [FLE],
- which is placed in the corresponding Matter’s fundamentally absolute, fundamentally continuous, fundamentally flat, and fundamentally “Cartesian”, (at least) [4+4+1]4D spacetime with metrics (at least) (cτ,X,Y,Z, g,w,e,s,ct) – which fundamentally cannot be impacted/transformed by anything in Matter, and fundamentally cannot impact on/affect anything in Matter.
At that FLE “size” and “FLE binary flip time” are Planck length, lP, and Planck time, tP, and the speed of light c= lP/tP.
More about what Gravity Force is see the Shevchenko-Tokarevsky’s 2007 Planck scale initial model of Gravity and Electric Forces in the 2-nd link above, the section 6. “Mediation of the fundamental forces in complex systems”, or in
To read the comment to the model in SS posts in
Cheers
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One of my friends asked me a question to which I could not find a clear answer. We know that the sunlight spectrum includes the entire wave frequencies including those (of the order of 1 GHz) that our home satellite dishes receive from the satellites revolving around the earth. However, I have not ever seen/heard that there are noises on TV as home dishes face the sun. Why?
Is it possible that home dishes never face the sun during the entire day?!
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You will certainly find the information on this site very informative in providing information to your friend:
Best Regards, André
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The recent (1) “observation” by LIGO of a neutron star merger and (2) what is considered as different from it, namely, the arrival of the visible light from the merger at our location, used to be perceived as an indication that gravitational waves may have the same velocity as electromagnetic waves.
But it need not exactly be so, because even in this case we speak of our observation of the neutron star merger using the luminal velocity. Then make independent conclusions on gravitational waves. This is to be granted as a reconcilable manner of looking at gravitation in terms of luminal velocity.
In fact, the gravitational waves are themselves not being observed here directly in terms of gravitational waves or anything known previously to be of that kind in velocity. Instead, we are using the light and other electromagnetic radiation from those astronomical objects and saying that they present us with some real information about the gravitational waves.
From this it is clear that, even today, experimentally we are not sure of the velocity of gravitational propagation.
We assume it to be c because of our observation of electromagnetic propagations that carry to us news of gravitational propagation from the said objects. Hence, it need not show their velocity to be equal.
Here arises the question: At the level of the large-scale processes of the cosmos, is gravitation or electromagnetism (or any other non-gravitational or contrary-to-gravitation propagation) more influential in determining the general evolution of the structure of the cosmos?
I hold it has to be gravitation that has the final say. My arguments are indirect. I shall put them forth in the course of development of arguments in the discussion.
What I want to accentuate is this: If there are other (may be infinite number of) worlds of different content, density, etc., the velocity of what may be termed gravitation proper in each of them might also be different.
This may be the case also for non-gravitational propagations in each such worlds.
FOR MORE, CONSULT THE DISCUSSION:
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This is a very good introduction. Since the answer to your question is quite difficult due to the current bad attitude, and in some respects we have different opinions - regardless of who sees things better - I would only phrase the first sentence differently. But it may also be that, in light of what you want to say, it is worth leaving it as it is, and perhaps draw attention to why you worded it this way with a footnote:
My opinion to your introduction:
' I am surprised when some physicists tell me that either the electromagnetic (EM) or the gravitational (G) or both the forms of' manifestation of nature 'do not exist' and they they will be able to express themselves 'as waves or particles propagated from from the' basic essence of matter.'
(I did not make a Hungarian version of the quote, I immediately tried to rewrite it in the given form. My wording, not the most perfect, but linguistically corrected, in case it helps you.)
Ez egy nagyon jó bevezetés. Mivel a kérdésedre adott válasz a jelenlegi rossz beidegződés miatt eléggé nehéz, bizonyos tekintetben más a véleményünk - füffetlenül, hogy ki látja jobban a dolgokat - egyedül az első mondatot fogalmaznám meg másképp... De az is lehet, hogy annak tükrében, mit akarsz mondani, érdemes így hagyni, és esetleg egy lábjegyzettel felhívni a figyelmet, arra miért fogalmaztad meg így:
I wish you good luck: succeed in realizing what you want in the best possible form!
Regards,
Laszlo
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Hello all
I’ve synthesized recently different magnetic nanomaterials, and as a trial, i pressed the powder into rectangular shapes and put them inside a rectangular waveguide with similar dimensions to study their electromagnetic properties in the microwave region.
Then using the Nicholson-Ross-Wier method i calculated Epsilon, which should be nearly constant for such systems.
Finally, i calculated the return loss RL using 20*log((Zin-Z0)/(Zin+Z0)) where Zin is Mu and Epsilon dependent and Z0 = 50 ohm
RL should be negative and dipping below -10 dB once with a large bandwidth
Images are available below
The sample dimensions are 2.3x1 cm, and they have a thickness around 2.4 mm. the 2.3 cm side is 0.1 mm to big for the waveguide so it requires some quick polishing, which sometimes leaves a small air gap due to human error
My main question is, what is causing such massive peaks and jumps in the calculated parameters?
It’s either from the setup, the small gap or some hidden error in the matlab NRW code? which after importing the real and imaginary S11 and S21 is:
S11 = s11r + 1i.*s11i;
S21 = s21r + 1i.*s21i;
X = (S11.^2-S21.^2+1)./(2.*S11);
G = X + sqrt(X.^2-1)
G(abs(G)>1) = X(abs(G)>1) - sqrt(X(abs(G)>1).^2-1) %%this is to guarantee that abs(Gamma)<1
T = (S11 + S21 - G)./(1-(S11 + S21).*G);
%% This is 1/Lambda^2
ils = -(1./(2*3.141592*L).*log(1./T)).^2;
%% This is 1/Lambda
il = sqrt(ils)
Mu
M = il.*((1+G)./(1-G))./sqrt((1./L0.^2) - (1./Lc.^2));
Epsilon
E = L0.^2./(M).*(1./Lc.^2+ils);
This code worked for the given example in the following pdf's explanation of the NRW method:
Any help is much appreciated
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Hello,
In microwave characterizations, you must make sure that you followed the right procedures for characterization such as calibrations and sample preparations. Many factors could have affected your results.
I have the following advice for you:
1- Re-calibrate the VNA more than one time and characterize the sample each time to check the difference between results.
2- If you have any air gap in the sample, the results will never be accepted or OK. You must make sure to TOTALLY avoid the air gap. In my opinion, the best way to avoid air-gap is to fabricate your sample inside the sample holder (the one which you use during characterization) you can refer to my article in IET
@ One more thing, are you sure that there are not any air bubbles inside your sample? Having an air bubble inside the sample will also affect your results.
@ Have you checked the homogeneity of your samples? It is crucial to ensure that your sample is homogeneous.
3- You can also check the air gap by simply directing a strong light (for example, a mobile torch) to one side of the sample and observing the light on the other side of the sample (this method could help but it is not always effective).
4- Both sides of the sample should be smooth as possible.
5- If possible, try to characterize any other samples apart from your samples and check the results.
6- If you followed all mentioned advice and the results are still the same, then, I advise you to increase the thickness of your sample and also fabricate more than 5 samples and characterize all of them.
Any tiny or very small air gap will destroy your results. The air gap can never be accepted in such characterizations.
All the best!
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(This also answers the criticism that the natural and the artificial shouldn't be mixed. The discussion takes the view that “natural” and “artificial/technological” are the same thing – and explains HOW they are the same thing)
Let's begin with a statement I read recently, “Special relativity is the most fundamental, and thoroughly proven, theory in all physics.” I won’t question that but I will suggest that we consider quantum gravity (QG). There’s no theory of quantum gravity at present but modern physics seems to have little doubt that we will have a successful theory one day. Despite the enormous success of general relativity, that theory will require adjustments to fit in with QG. Quantum mechanics will also need modifications to fit in, as Einstein realized when he called it incomplete. In all history, there has never been a single theory that could be called 100% perfect in the sense that it explained every detail forever, and never needed refinements – and there will never be such a theory. Our period of history is no different and that other product of Einstein’s brain (special relativity) has brought great advances but must inevitably endure the same fate of being refined.
May I suggest possible modifications to the above theories – not to attempt to compete with quantum mechanics or the relativity theories but merely to demonstrate that refinements of them are conceivable.
First, quantum mechanics –
Reliance on bodily senses – extended to our technology – tells us things and events are distinct and separate. Acknowledging the correctness of this frame of reference means there are countless particles forming the cosmos. Recognizing the truth of a different point of view means these particles are unified by the action of advanced and retarded waves into one particle* - whether it be classified as a boson or fermion (or both). The interpretation of particles being in two or more places at once can be reinterpreted as being in one position i.e. unipositional, from the Latin ūnus meaning one. This unipositioned particle interferes with itself since it’s composed of self-intersecting Mobius strips which, because mass is united with spacetime, account for spacetime’s curvature. Unipositional quantum mechanics also means every particle is entangled with every other.
* "When we solve (19th-century Scottish physicist James Clerk) Maxwell's equations for light, we find not one but two solutions: a 'retarded' wave, which represents the standard motion of light from one point to another; but also an 'advanced' wave, where the light beam goes backward in time. Engineers have simply dismissed the advanced wave as a mathematical curiosity since the retarded waves so accurately predicted the behavior of radio, microwaves, TV, radar, and X-rays. But for physicists, the advanced wave has been a nagging problem for the past century."
("Physics of the Impossible" by Michio Kaku, 2009, Penguin Books, p. 276)
Second, addressing the subjects “non-causal” and “at once” –
All mass is composed of gravitational and electromagnetic waves, according to vector-tensor-scalar (VTS) geometry inspired by the title of Einstein's 1919 paper "Do gravitational fields play an essential role in the structure of elementary particles?" Both types of waves possess retarded and advanced components which cancel each other and entangle all masses. Wick rotation (time) is built into the Mobius strips and figure-8 Klein bottles composing (respectively) electromagnetism's photons and gravitation's gravitons. Therefore, all time (the entire past and present and future) is united into one thing just as all space and all mass are united into one thing. If time only passed rectilinearly - from past to present to future - the idea of waves travelling back in time would make no sense at all. But if time is curvilinear - with past, present, and future interconnected - time must be able to move from future to present to past.
(Unity of past/present/future may remove the issue of non-simultaneity – in special relativity – because the timing or sequence of events being different in different frames of reference can only exist if past/present/future are separate. The concepts of cause and effect are no longer separate when all periods of time are united, and everything can happen “at once”. This is similar to watching a DVD – every event on the DVD exists at once since the whole DVD exists but we’re only aware of sights and sounds occurring in each tiny fraction of a second.)
Third, proposing faster-than-light travel (a feature of special relativity is light-speed as the universal speed limit).
The Riemann hypothesis, proposed in 1859 by the German mathematician Georg Friedrich Bernhard Riemann, is fascinating. It seems to fit these ideas on various subjects in physics very well. The Riemann hypothesis doesn’t just apply to the distribution of prime numbers but can also apply to the fundamental structure of the mathematical universe’s space-time. Cosmic maths incorporates
1) topology (the two-dimensional Mobius strip and figure-8 Klein bottle which is immersed [not embedded] in three dimensions),
2) BITS aka electronics’ BInary digiTS, or base 2 maths, which encode the topology,
3) the real and imaginary numbers of Wick rotation (time),
4) vector-tensor-scalar geometry, describing interaction between photons and gravitons, and
5) the Mobius Matrix, combining the topological Mobius and mathematics' Matrix to explain higher dimensions.
How does the Riemann Hypothesis support Faster-Than-Light travel? Answer – Using the axiom that there indeed are infinitely many nontrivial zeros on the critical line (calculations have confirmed the hypothesis to be true to over 13 trillion places), the critical line is identified as the y-axis of Wick rotation (stated above to be the time component of space-time). This suggests the y-axis is literally infinite and that infinity equals zero. In this case, it is zero distance in time and space. Travelling zero distance is done instantly and is therefore faster-than-light travel.
It must be stressed again that I’m not saying the above ideas are either correct or incorrect. I’m merely seeking to show that modifications to special relativity, general relativity, and quantum mechanics are indeed possible!
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Samuel Reich Samuel, without yet reading into attachments - is the result of your proofs maybe explaining the root cause for the null result of the MM?
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I am a PhD in mathematical modeling and never studied applications in diabetes treatment.
However, by particular reasons, I was searching some new researches in the area. In fact, I've found some people doing electromagnetism tests to promote better life quality to patients. It seems fantastic to me.
I am interested in learn more about it. Some researcher can indicate me some new trend?
Thank you!
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Dear enthusiastic researcher,
It's a very important area of work. As this causes premature death and world wide high priority non-communicable disease for mortality and morbidly.
I do not know, did you know about: Disability adjusted life year (DALY). It is one of evaluation or assessment method or tool use in health economics. This is very frequently use method or toll.
My personal view regard new practice is, any exploring depend on scientist or researcher. For innovation, you needs to think about your attributes first like in a situation what is the problem you identity and what are the attributes you can use to find your answer and finally, "how will you express that". That will be new approach.
Keep consider one things, you will never find so many literature on application of new method the reasons behind this is, durning study design most of the researchers find "what method mostly use world wide as world wide application will give researcher to know about the question and objective set in study. A research take long time for accomplishment and as far I observed, except trail none wants to go for that.
Lastly, my voice to this is you can try this one in own platform (work) to see the result that will give you practical answer and best assistance.
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It's not 'Einstein's' theory because many scientists developed aspects of it long before him, even such as Newton, and many since :)
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This morning, I found a couple of paragraphs in a book I had published a year ago which made me wonder if the EmDrive, EM Drive or radio frequency (RF) resonant cavity thruster should be renamed the Possible Engine. I don't know if these are more deep thoughts or if it's just my subconscious telling me I have a secret crush on Supergirl 📷 but here are those 2 paragraphs -
"British engineer Roger Shawyer proposed the EmDrive, EM Drive or radio frequency (RF) resonant cavity thruster in 1999 and it's claimed to use patented microwave technology which converts electrical energy into thrust by amplification of the microwaves creating pressure which drives the vehicle's front forwards. Light is one form of electromagnetism – microwaves are another (so they also obey James Clerk Maxwell's electromagnetic laws and their solution for both retarded and advanced components of the waves).* So some of the microwaves are advanced, and travelling back in time.^  To this action, there is - agreeing with Isaac Newton's 3rd law of motion - an equal and opposing reaction i.e. a thrust forward in time. Since space can never be regarded separately from time, an object in space is affected and the forward thrust in time could power a spacecraft through the void via the EM Drive.
* Gravitational waves must also have advanced and retarded portions. Einstein's equations say gravitational fields carry enough information about electromagnetism to allow Maxwell's equations to be restated in terms of these gravitational fields. This was discovered by the mathematical physicist George Yuri Rainich. [George Yuri Rainich, Transactions of the American Mathematical Society, 27, 106 - Rainich, G. Y. (1925)]
^ The attached "Topological Propulsion Through Space-time" should explain how advanced waves are indeed possible.
"What are the consequences if gravitational fields play an essential role in the structure of elementary particles,** and if gravitational waves can travel back in time? Then the equal and opposite reaction providing the forward thrust in time could not only "power a spacecraft through the void", but it could power anything with gravitational waves in its composition. This includes giving controlled flight to Superman and Supergirl, without any jetpacks - acting in a manner similar to the proposed method of EmDrive, superbeings would be powered through the air."
** The section about vector-tensor-scalar geometry in "Topological Propulsion ..." explains the relation between gravitational fields and elementary particles.
"Out of Time - Predicting the Science of Future Centuries and Millennia (Edition 2)", 19 October 2021, Page 1-93 https://doi.org/10.9734/bpi/mono/978-93-5547-061-4
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I received an email today from Prof. Zeb Rocklin (School of Physics, Georgia Tech, USA) which agrees with you. He wrote, "As I understand it, the "Impossible Engine" purports to start at rest and then move forward without exchanging any momentum with its environment. That is indeed impossible in a flat spacetime. It's not impossible in a curved spacetime, but the effect is incredibly small and not, as I understand it, consistent with the empirical claims surrounding the "Impossible Engine"."
This is how I replied -
Your understanding of the Impossible Engine sounds totally correct to me. It would also apply to what I wrote about how the Engine could work. The advanced waves providing forward thrust according to Newton's 3rd Law of Motion need to be amplified trillions - maybe trillions of trillions - of times to provide the desired effect. Amplification could be achieved through the theories of Max Tegmark, MIT professor of cosmology, that the universe is literally composed of mathematics. Building on his belief, let's say electronics' binary digits (BITS) of 1 and 0 - aka base 2 maths - are the ultimate composition of, and are used to program/code for/ "draw", Mobius strips. Then two Mobius strips can unite to form a figure-8 Klein bottle. Trillions of Mobius strips can form a photon, and trillions of more complex figure-8 Klein bottles can form the more complex graviton. (The Klein is immersed, not embedded, in the 3rd dimension - a photograph of a stapler is a 2-dimensional immersion of a 3-dimensional stapler, and an immersion may have self-intersections; embeddings have no self-intersections.) If the whole universe is projected from 2D (as proposed by the holographic-universe theory), then both gravitational and electromagnetic waves must be projections from 2D, too i.e. from the Mobius strip which is made up of binary digits. Therefore, the range of frequencies (aka bandwidth) called gravitational and electromagnetic waves is composed of BITS. The universe is a mass of this gravitational-electromagnetic unification (and there is nothing except sufficient bandwidth). Since the advanced part of waves is digital and made of BITS, the advanced waves can indeed be amplified by electronics’ transistors.
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I know that the electric field inside a charged conducting shell is zero. However, what if we accelerate the shell uniformly? Does the charge distribution remain uniform? If not, is it possible for the new charge distribution to allow some electric field to penetrate the conducting shell?
I guess that the shell still resists the electric fields to be penetrated inside it even if the shell is accelerated, however, I cannot prove it.
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There is a discrepancy in the definition of rigid motion in this thread.
According to Michael D. Foegelle:
>>They assume a shell with uniformly distributed charge undergoing "rigid" motion. I.e. the charges are stuck in place in the shell.<<
The concept of rigid motion of the charged spherical shell as defined in the paper suggested in my comment is as follows:
>> Now consider a spherical shell of charge undergoing rigid hyperbolic motion. By rigid motion we mean motion such that, at any moment, there is an instantaneous rest frame in which all parts of the body are at rest, and the physical dimensions of the body in each such frame are constant (i.e. the same in all successive instantaneous rest frames), see for example Steane (2012)<<
In this definition of rigid motion, there is no mention of the specific form of the distribution of a charge.
I wonder if the second definition implies that the distribution of charges is fixed.
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Are there any students or professors with students interested in helping with research of Bob Lazar's Sport Model? I don't have much money, just the thrill of a whole new field of study, specifically , a link between electromagnetism and gravity. For more information, please see the attached presentation. Skip over project 1 and see project 2 and 3 used together at the end of the file. This research is for people with experience with microwave RF and microwave magnetic materials.
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Did you complete or find someone to work on project 3?
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The refractive index is obtained owing to classical electrodynamics. Is there any way to know how much momentum the electron gains when light incident on a dielectric material? How does the momentum of the electron depend on the refractive index ?
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Here is a quantum theory of refractive index.
For a beautiful treatment of classical origin of refractive index, you may take a look at Feynman Lectures.
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I have the dimensions of an electromagnet comprising a 0.8mm diameter copper wire, which is used to make a coils around 11mm X 13 mm rectangular cross section core material. The dimensions of the coil after wounding around the core is 25mm X 23mm cross section and 17.6 mm height.
So, how to find the effective number of turns in this for calculating M.M.F and also what other properties can be calcuated from this?
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I think what is required is "what is the number of turns right next to the core, that is equivalent to the actual coil that has a large cross-sectional area?"
http://info.ee.surrey.ac.uk/Workshop/advice/coils/index.html#bib has a list of references, and some equations, and you may be able to relate the inductance of the actual coil to the inductance of a single layer solenoid, and get the equivalent number of turns.
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Inertia, by definition, is a concept of measuring the “change”, the resistance, in the “natural state” of a body in motion. Is it thus correct to suggest that the idea of a “natural state” is exactly what a theory of everything would entail, and thus would not include the idea of “inertia”, would not include the deliberate man-made “changing” of bodies in motion, bodies in motion that would ideally primarily yield to fundamental field forces? Is not “inertia” a man-made theoretical concept to highlight how we are able to “resist” bodies in motion, to change the natural course of mass, as a “disruptor” within an otherwise ideal “theory of everything” manifest as the natural state of reality? The big question is then, “can using the idea of inertia provide for a link between the most fundamental field forces of gravity and electromagnetism” in achieving a grand unified field force theory of time and space?
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My apologies for my untimeliness in replying to an answer of yours, as follows:
📷
Stephen Jarvis added a reply
July 26, 2019
"Yes, which makes the idea of "inertia" a broad-spectrum "manner" of examination, does it not? "Inertia" applies to anything, can apply to anything. It's a "manner" of examination. The "manner", that "manner" of inertia, is in question, as ultimately it represents an idea that challenges more fundamental properties of time and space "we" as humans are not naturally conscious of. We are conscious of push-pull, sure, and so we determine ideas of "work", "effort", and "force" in our own physical structuring within that reality we are trying to understand in such a manner, "yet"......there is more, is there not, more than "push-pull inertial logic to the explanation of time and space? There clearly is.
Inertia is a "concept" of "resistance" a body prescribes by our observation of that resistance we physically force ourselves to fumble through space and time with, "and then" construct theories further with that fumbling. "Yet" we are given hints on that journey with which we can be more intellectual "with" as opposed to physical, as per our approach to the primary axioms we are seeking to calculate.
Is inertia a "field force"? Seriously, no.
Does "inertia" exist between the fundamental field forces?
Seriously, no.
If it did, it would be its own field force separate to everything.
Yet, it was our start point in the middle ground of examining reality, was, and is, it not?
Inertia is like a natural flaw we have in being human....we strive, we work, we use force....yet that is a subjective reference of control. Reality exists, and here we are examining what exists from our inertial reference we seem to be applying to reality, to time and space. Its a natural thing for us to do, sure."
MY REPLY:
I have italicized phraseology to which I strongly object on the basis of the diction, that is, the use of the English language is objectionable. The generalized reason why this observation is being made is that the authorial voice you use conflates two different domains or systems of meaningful language: (2) scientific language, terminology, and expression; and (2) discursive English prose when applied to common situations in which nonscientific yet nonetheless important matters are being discussed.
One of the important and basic key words in the passage cited above which is also in the discussion question is "inertia." Although the cited passage occurred more than two years ago, and your perspectives may have changed since then, I would like simply to express my objection to the way little or no distinction is made between the word "inertia" is employed by Isaac Newton in Philosophiae Naturalis Principia Mathematica and the ordinary dictionary meaning of the word "inertia," which is synonymous with a word such as "lethargy," implying an absence of movement ascribed to a living entity (human being, nonhuman animal). Quite obviously, Newton uses the word "inertia" with specific reference to physical bodies that belong to the cosmos of the solar system. His First Law calls attention to the fact that these planetary bodies are continuously in motion following their orbital paths around the sun because no competing body forces them to alter their accelerated movements, which are based on their respective masses. In contradistinction to this denotative meaning of the word "inertia" in Newton's Principia, the denotative meaning of the same word in ordinary discourse is, as the above cited excerpt from your reply asserts, has negative connotations, which may be regarded as "a natural flaw," in your words. In my view, it is a huge mistake to attempt to personify Newtonian inertial motion by drawing a false analogy with the familiar everyday usage.
Other examples of what I consider to be inappropriate diction could be adduced (please see italicized phrases in the above cited excerpt).
Thank you for your kind attention to these belated comments, but I did not know about this RG discussion thread question until just now.
Best wishes,
Nancy Ann Watanabe
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This paper is a project to build a new function. I will propose a form of this function and I let people help me to develop the idea of this project, and in the same time we will try to applied this function in other sciences as quantum mechanics, probability, electronics …
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Please allow me to follow this question.
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Hi,
Is there any tips that can make finding modes for fibers, such as photonic crystal fibers, an easy process?
Thanks.
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Dear Muhamed A. Sewidan , I would model a section of the plasmonic fiber, including the materials and their properties, and using a light source with the conditions required.
The Ansys Lumerical´s knowledge base provides useful modelling information about this issue that might be useful to you:
Hope this helps.
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I am looking for a Hall effect sensor that can be interfaced with the Arduino board for measuring the flux densities of permanent magnets(NdFeB 40, NdFeB 42 etc.) at varying distances from the Magnet's surface.  
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I think that KSY 14 (Siemens) goes up to 1T.
It existed HE144 and 244 that claimed to reach 1.5T within 2% but seems to be withdrawn
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I am looking for a solid core material for DC electromagnet design, but could not find any. I found only hiperco 50 material, but it's price 123$/kg too expensive. Would you suggest me suitable and avaliable core material on the market.
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Hi. Did you do seach on net ?
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The waelength of the CMBR is about 10^-3 metres, what is the longest wavelenght or lowest frequency of electromagnetism detected in a vacuum.
Please do not include ULF electromagnetic frequecies as these have to go through a solid (the planet Earth)
Many thanks in advance for your replies
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Think about the Schumann resonances of the spherical resonator earth -ionosphere which start about at 7 Hz and are partly in vacuum (ionosphere).
And very low frequencies ( around70 hz)have been used for military communication to submerged submarines.Those very big wavelength are not easy to radiate (emit and receive) since the wavelength is in yhe ballpark of serval 1000 km.(50 Hz=6000 Km)
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Can I please ask for good articles/papers/ thesis on Flat Lens Antenna to study? Is it metamaterial or antenna having a metamaterial at the back?
I am looking at this:
Trying to understand what is this?
Thank you
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Hi,
You See Rotman Lens Antenna, it's the same exemple,
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If you had a design for an electromagnet core that required it to be assembled out of several parts would it still produce as strong a magnetic field as the same core but made out of a single piece?
My thinking is that the magnetisation may not be as effective across the boundary between two metal components that are touching as opposed to a solid piece of metal but I am unsure as to how detrimental that would actually be.
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the magnetic permeability of the air influences, so the field intensity will be better if there is no air involved
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I need some help. I am involved in calculating numerically the potential and electric field solutions in the 3D space of the classical problem of a disk with radius r0, biased at potential V0, surrounded by a circular crown of a flat dielectric (from r0 to rb), and this in turn by a flat infinite conductor at V=0. The three elements are located, for convenience, in the Z=0 plane, and the disk axis coincides with the Z axis (angular or acimutal symmetry).
I realize this is a problem involving 3 boundary conditions in separate domains, and with 'hybrid' character, because in the dielectric the only thing we can say is that the vertical component of the electric field (Ez), or potential derivative in the z direction (dV/dz), is null (by smmetry). This is what literature considers an "triple integral equation system with hybrid boundary conditions".
I follow the guidelines proposed in books and formulate the solution for the potencial V(r, z=0) in the dielectric region in terms of series of Bessel functions.
My problem is that I am able to solve the series coefficients for V defining a domain for the Bessel funtions up to a distance rh > rb (well inside the grounded conductor), without using the hybrid boundary condition dV/dz=0. In fact, the problem is that my solution meets well the condition V(r)= V0 (for 0 < r < r0), and V(r)=0 (for rb < r < rh), but does not meet the condition dV/dz = 0 in r0 < r <rb. If I try to impose this condition, apparently the only solution is the trivial one, null. What am I doing wrong?
(I know the analytical solutions of the triple integral equation system proposed by Duffy for the so-called A(k) function, but I wanted to formulate the problem in terms of discrete series, and not continuos functions). Can someone help me with this?
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Last news: I've found this paper: "On the problem of an electrified disc located at the central opening of a coplanar earthed sheet", by A.P.S. Selvadurai, Mech. Res. Commun., 23 (6), 621-624 (1996). Although it is very short, it provides a solution. I still have to check it.
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Wavelength of light is an obvious factor, but this is not my point of question
Some specific questions are
  • What can be molecular/atomic level mechanism behind temperature and density dependence of refractive index?
  • refractive index is square root of product of relative (electric) permittivity and relative (magnetic) permeability of a medium. How a ceramic/glass/polymer structure can attain high relative permittivity (higher dielectric constant means more polar groups in polymers, more charge imbalance in ceramics) and high relative permeability (aromatic groups and ferromagnetic ligand centers in polymers, second one also for ceramics) without losing transparency?
  • how phase angle of complex permittivity and permeability of a medium depends upon its structure (e.g. factors mentioned above, bulk of chain and steric effect in polymers, photon propagation and phonon-mediated dipole oscillation of ceramics, chemical substitutions in ceramic structure)?
  • Why some atoms elevate refractive index of ceramics and some substituent groups elevate refractive index of polymers more than others? While atomic/ionic polarizability can be explained from fajan's rule and pearson's HSAB theory, and magnetic behaviors can be explained from magnetic spin, electronic configuration (and spin exchange between nearby atoms); have there been any comprehensive work combining all these aspects to predict refractive index elevation?
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The refractive index of polymers directly related to the polarizability and depends on the wavelength of light.
If a material is structurally isotropic, then it is optically isotropic, and a single refractive index typifies the refraction behavior.
In crystals and anisotropic materials, the refractive index takes different values along different principal axes, and the material is said to be doubly refracting.
The molecular weight of polymers affects their refractive index, but its effect is not significant. In some polymers, as the molecular weight increases, the refractive index increases. For example, for Poly(ethylene oxides), when the molecular weight change from 303 to 9523, the refractive index increases 0.8% (from 1.44592 to 1.45392). While, for polycarbonate, as the molecular weight increases (from 228 to 7196), the refractive index decreases 0.95% (from 1.6021 to 1.5868).
As a result, the relation between refractive index and structural and physical properties is complicated.
I have attached one text about refractive index of polymers. I hope it would be useful.
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if there is somebody who can help me with modeling an electromagnet 12V Dc and a piece of material placed on the electromagnet core to study the effect of current flux on the mechanical properties of the material.
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I recommend you to use FEMM free SW for magnetic modeling.
It is free and simple to start with. It is only for 2D models (planner od cylindrical). There is an example similar to your application
You can simply modify geometry and parameters. There is a library of basic materials. In my experience, the material library excellent fit reality.
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I made an iron powder core of the following specifications:
Radius : 65mm
Length : 10mm
Mass of iron used : 10% mass fraction (20g)
Total mass : 200g
Binder : Slow cure epoxy
I noticed that after curing, the iron powdered settled at the bottom and formed a thin layer. The core also did not increased the magnetic field strength of the magnet. As I don't have enough epoxy to make more cores, I'm wondering if anyone know if the lack of improvement is due to the amount of iron used, the fact that the iron settled at the bottom of something else I may not have considered.
Any help or tip is very much appreciated. Thanks !
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some proposals to improve the intensity of the field:
reduce the radius of the cylinder
increase the iron fraction in the epoxy
previously magnetize the iron to provide significant remanent magnetization
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Looking for some good FEA software that is not cost prohibitive.
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This seems like an old discussion but probably worth mentionning that now sparselizard is available open source, and will be amazing at doing what you want and much more. Extremely user friendly, lots of examples online, robust, fast, documented. The force will be computed using a single liner.
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I am looking for benchmarks in educational studies that investigated the benefits, obstacles and disadvantages regarding the use of simulation software to support teaching at undergraduate level. It would be interesting to see results both from a teaching perspective as well as the learning outcomes and benefits to the students' understanding of STEM. It could be applied to any field in which simulation software is used (structures, fluids, electromagnetism, etc).
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THE ROLE OF SIMULATION AND GAMING IN ACQUISITION STUDENTS’ COMPETENCES FOR THEIR FUTURE CAREERS
In that regard, “Simulation and Gaming”, as active methodologies, in the context of Applied Linguistics, particularly as regards Teaching, entails an innovative approach or methodology, which makes students need to argue, express their feelings and ideas, and defend their point of view, thus practicing and developing mental and emotional processes that will activate whenever he or she submit to a real communication situation, which, furthermore, develops the objectives and makes them acquire the target competences for their future professions.
Progressing in the exposed sense, Hussain and Coleman (2014) explore the theme of field leaders in serious games and professionals in entertainment games, who share practical guidelines and lessons from their own experiences researching and developing learning games. According, then, to Hussain and Coleman (2014), the method often associated with instructional system design has become known as the ADDIE. ADDIE is the acronym for the five phases in the model: Analyze, Design, Develop, Implement, and Evaluate.
Analysis is the starting point for instructional design. Much as a software developer conducts an analysis to determine the requirements for software, an instructional designer conducts an analysis to define the performance issues and gather data for potential solutions. Various types of analyses may be conducted, but analyses of both the learners and the learning problem are essential. Learner analysis focuses on understanding what learners know, what preferences and biases they might have, and what specific performance will be expected of them, providing information to guide decisions about the content, learning strategies, and assessment approaches. Based on this information, for example, the design of a learning intervention for an experienced air traffic controller, who must demonstrate mastery of emergency procedures in a real-time simulation would likely differ in strategy, complexity, and type of feedback from instruction designed for a novice who will be expected to explain how aircraft are spaced in routine and emergency conditions. Other important analyses include content analysis (working with subject matter experts (SMEs) to assess what must be taught), context analysis, (where the product will be used physically and the curriculum in which it will be used), and task analysis (which also requires SMEs – possibly different ones).
Design and development are closely linked as the design process includes feedback loops to refine and modify instruction based on observed outcomes. Initial design requires an understanding of the subject matter (i.e., target domain) and the science of learning (e.g., how individuals learn, strategies to optimize learning and reduce interference). In the first case for the expert air traffic controller, a learning objective might be “the learner will safely manage the flight pattern during a storm and subsequent power outage.” For the novice, the learning objectives might be “the learner will provide a plan for spacing aircraft during a storm” and “the learner will provide the rationale for the distances represented in their plan.” These objectives will drive the design of the learning interventions, including the complexity of tasks, pace, and frequency and type of feedback.
To ensure subject matter knowledge, designers work closely with subject matter experts to create meaningful learning experiences. This partnership must recognize the strengths of both the designers and subject matter experts to focus on what each does best. While experts are good at what they do, designers cannot and should not expect them to always know the best way to teach specific skills. Subject matter experts may not be aware of science of learning best practices that address how people learn, best practices for feedback, or strategies to manage cognitive load that must be factored into good design. Subject matter experts also may not fully recall what it is like to learn something as a beginner or they may be constricted in thinking only of how they learned something. Subject matter experts are essential, to help the instructional designer define the tasks, working environment, and common errors learners make.
During implementation, learning products are delivered to students and data is collected to determine how well the intervention achieved its intended outcomes and to identify opportunities for improvement.
Evaluation captures both formative and summative evaluation activities. Summative evaluation occurs at the end of the instructional intervention to determine the extent to which the learning objectives were achieved.
Bibliographical reference
Hussain, T. S., & Coleman, S. L. (Eds.). (2014). Design and Development of Training Games. Cambridge University Press.
Source:
In the following link, you can find another featured research, which may relate to the role of “multidisciplinary nature of learning-games development.” Source (Flexible Learning Environments):
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Dear Sirs,
I think many knows the ideas due to Jules Henri Poincaré that the physics laws can be formally rewriten as a space-time curvature or as new geometry solely without forces. It is because the physics laws and geometry laws only together are verified in the experiment. So we can arbitrary choose the one of them.
Do you know any works, researchers who realized this idea. I understand that it is just fantasy as it is not proved in the experiment for all forces excepting gravitation.
Do you know works where three Newtons laws are rewritten as just space-time curvature or 5D space curvature or the like without FORCES. Kaluzi-Klein theory is only about electricity.
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📷Preston Guynn. added a reply on June 19, 2019:
Force, mass, and energy are a parallel set of descriptions of the effects of special relativistic Thomas Precession. All matter and space, and their interactions are described with distance in three dimensions, time, and their derivatives.
Newton's first law of motion is , "Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it."
Yet the concept of motion requires at least two objects, and if there are two objects, then there is always an external force, which is gravitation.
So the idea of rewriting Newton's laws without force (or mass or energy) is good, but it should be extended to incorporate the most basic non-linear effects of motion in space time, which are special relativity and Thomas Precession.
See my article describing the recent discovery of the effects of Thomas Precession the particle and galactic scales.
Article Thomas Precession is the Basis for the Structure of Matter and Space
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Hi,
I'm attempting to create nonlinear metamaterial structures in comsol and I don't know how to measure second harmonic generation.
How do I measure that frequency x goes into structure and generates frequency 2x ?
Thanks for any help.
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Does this work?
One fundamental problem I am facing how to see the frequency components (in ewfd physics, frequency-domain study) in COMSOL other than the excited one( mean by the mode at other frequencies).
A very simple experiment if I take one 500nm width by 30 nm height Si waveguide (2d simulation), and excite it with 193.42 THz at port 1 end, now if I want to see the frequency components at 300 or 200 THz it should appear null or no field components. But how to observe it in COMSOL (the modes or the field components can be seen at 193.42 THz since it's the excited one).
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Is there any software (preferably MATLAB) for computing the E field resulting from a short dipole above a stratified media? I found something for a line source, but not a dipole.
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Thank you, Greg!
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The general term of the current reads
J_total=J_conduction+J_Displacement.
Where in most cases J_C obeys Ohms law and J_D=epsilon dE/dt.
Usually when a capacitor is disconnected from the electric circuit the the condition current is zero and so is J_t=0.
What will happened if I now intentionally adding a time dependent electric field between the capacitor plates (not sure if it's possible so it may be considered as a though experiment)?
My thought is that J_C will cancel somehow the displacement current in order to maintain J_t=0 since there can't be current outside the capacitor.
Is this analysis true or false? am I missing something? What is the meaning of conduction current in this case?
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Perhaps we need to define "conduction current". Conduction through what?
"Nevertheless, the question is hypothetical, and it's intention is to understand the relation between conduction and displacement currents in situation where they sum up to zero."
This implies the presence of a "conduction current" equal and opposite in sign at a particular node of the circuit, unless both currents = 0.
What is the nature of this cancelling conduction current and what is the circuit path?
As for the example of propagating EMF, the energy is being shuttled between an electric field and a magnetic field. A magnetic field is the result of a current.
Note also that the time average of the RF EMF is =0.
In the attached drawing, the electric field produced by the ac source will appear between the inner plates of the capacitor, not between the outer plates. in order create an electric field between the outer plates requires that electric charge must be added to and/or removed from one or both plates. A movement of charge is a current. Even a van de Graaf generator physically adds charge to the electrode, although the mechanism is not a conductor.
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I need to build a continuous electromagnet, B=1-2 T, narrow hysteresis loop, good linearity (to have the flux density easily adjustable). Application - MeV electron beam deflection. I'll be grateful for any advice.
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Thank you very much, Iljaz! You are very helpful.
Can you recommend some certain types of materials?
Andrew
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I am following the below method so far & need guidance to further modify it:
1) Making a specimen
2) Making an Electromagnet using prepared specimen
3) Using DC & AC Source to find BH- Curve
4) Calculate Permeability from graph by taking respective points
Please make your suggestions regarding all 4 points
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It all depends on the parameters...what are you REALLY interested in..the field vs current ar one point..the field homogeneity..saturation properties etc etc..you may find a lot of hint in the IMMW proceedings (Intl magnet measurement workshops)and Also on the JACOW pages as well as in the CERN library ...CDS CERN..(all public access with free downloads.In addition you may look into the CERN accelerator school proceedings for magnetic measurements (via CDS CERN)
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Most people say that electro-magnet of strength more than 2 Tesla is not possible without superconductor.
Please tell me why ?
Regards
Nityananda Das
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I think Preston was on the right direction. I know that the N55 are an improvement over the 2T limit in my work, but ORNL is now 3D printing magnets. My work will allow the production of super fine metal powders of more uniform shape, and should drive this upwards. Why 5T goal?
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Is it possible to make a 4 Tesla or 5 Tesla magnet at 5 mm air gap. Air cooled.
Regards
Nityananda Das
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In my view, to reach 5 T you need a superconducting coil. You might get 2 T with a water cooled coil, but check the literature to be sure.
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Estoy trabajando con algunos alumnos Elementos Finitos para Electromagnetismo. Me interesa también la formulación con formas diferenciales.
Me gustaría hiciéramos un trabajo entre grupos.
Me escribes cuando puedas cpiedrahita@udem.edu.co.
Saludos cordiales,
CarlosP
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In an electromagnetic field the flow of energy is given by the Poynting vector. For an electromagnetic wave, this vector is in the direction of propagation and accounts for radiation pressure. However, in a static electromagnetic field the Poynting vector can of course be non-zero. It's not easy to understand how there can be a 'flow' of energy in a static situation. Please discuss.
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Dear Stefano ~
There appears to be, in your counter-arguments to what I’ve been trying to say throughout this discussion, an implicit unwarranted assumption, that electromagnetic energy can be transported only by an electromagnetic wave. But Maxwell’s equations do not warrent that assumption. As we all know, an electromagnetic wave is a very special kind of solution with in which E and B are orthogonal to each other and oscillate; they are, as you say, correlated in a special way.
In general, energy can be transported in many ways. That is a large part of what Physics is about. Wave motion is only one particular kind of situation encountered in physics problems. Energy in motion is momentum. Momentum is moving energy. That is basic physics, of which an electromagnetic phenomenon is only one particular instantiation.
Energy and momentum are observer-dependent quantities, that constitute a four-vector; they transform according to the Lorentz transformations.
Consider a very simple electromagnetic situation: a static uniform linear charge distribution. In the free space surrounding it there is an E but no B. There is an energy density but no momentum density (ie, no ‘flow’ of energy). Now transform to an moving observer. For that observer, there is a current as well as a charge. There is a B as well as an E. For that observer there is momentum as well as energy in the free space around the line. The Lorentz transformation tells us that. Momentum is moving energy – there is an energy flux density. Maxwell’s equation tell us that that energy flux density is given by E×B. In denying that you are violating either the Lorentz transformations or Maxwell’s equations, or both!
Long ago various contributers to this discussion wrote convincingly about an electron beam, in these terms. Unfortunately, those contributions are now practically inaccessible. (How many times can one be expected to keep clicking on ‘show previous answers’?!)
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Hi, everyone! I want to use fluent's MHD module to simulate, using electromagnet to generate a rotating magnetic field, which can induce current in liquid metal and make liquid metal flow. How can I add the time-varying rotating magnetic field to the MHD module? How to write magnetic field files in .mag form? Can anyone help me out?
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Hi, Chao Fu! Today I just asked my senior this question. He said that the magnetic field needs to be exported from the ANSOFT(or other magnetic field software) calculator. The values in the exported file need to be adjusted to satisfy the format of .mag. I will try it later, and we can communicate with each other about the simulation of magnetic and fliud. Best Wishes!
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Does anyone know if the poisson solver will enable the calculation of capacitance between electrodes with a cylindrical structure?
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Thank you to everyone who has replied. Since asking this question, I discovered the MIT FastCap program, which is downloadable as C source code. In my tests, FastCap is found to calculate capacitance with very good accuracy (essential for my purpose). I plan to publish something on this in 2020.
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Bonnor and Bondi suggest that GR predicts antigravitational interactions between negative masses. Jame Farnes points out that Newtonian mechanics suggest the same. But in electromagnetism interactions, same particles sign results in the same interaction, and only different signs behave different. Why choose one insted of the other?
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Yes, that is correct. However in the longer paper I argue that C and D must also exist in GR.
Although I mentioned that two metrics are therefore needed, in reality only one metric is needed;- particles of class C and D just accelerate as if they have negative mass rather than positive mass in the geodetic equation (which requires that GR be generalised to allow maximal violation of the principle of equivalence).
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Hi,
I'm trying to couple electrical circuit physics with frequency domain em wave.
In my simulation a wave of some frequency propagates through a split ring meta atom.
I have set lumped ports in the split gap of my split ring, and am attempting to connect a circuit element in my split gap to my split ring (eventually attempt to mimic a varactor diode but for now just a diode +resistor combination will do).
Whenever I run this, I get:
Failed to find a solution.
Maximum number of Newton iterations reached.
Returned solution is not converged.
Even if I change the iterations to 100/200 etc and even if I increase my relative tolerance.
I have tried a fine mesh and it takes a very long time and still has the same issue.
Any suggestions for helping the simulation converge?
Or even tips for linking circuit elements to 3d models in comsol as I'm new to the whole coupling physics functionality.
Thanks!
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In general you can improve the convergence by using generalized alpha with strict or intermediate time stepping. Also force the solver to take smaller maximum time steps. Get the jacobian update at each iteration. May be use the Anderson's acceleration too.
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Hello,
I would like to know how to deduce the amount of current flowing through a solid volume , when current is applied in the form of current density 'J' (A/m2).
Example: As shown in the image attached, the solid body is a rectangular volume which acts as a coil in a electromagnet. In the simulation model I am building , the current flowing through the coil has to be input in terms of current density. The total volume is about 4.5 x e-6 m3 . A current density of 1e6 A/m2 is applied to the body.
As current density J=I/A , if applied to a 2D surface area, it is pretty straight forward to calculate the current flowing through the area.
What is the formulation to calculate the current in amperes for the volume?
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in the equation J = I / A, I is aligned normal to the area A. If the direction of the current is known, one has to choose a surface that is perpendicular to the direction of the current.
If your picture represents a usual coil, then the four parts form a closed circuit. The cross-sections of each of the four parts seem to be of equal magnitude, so you have to choose one of them as area A.
In exercises like this, you don't have to worry about the corners. Here, the actual cross-section is larger but you can treat the corners as if the current would change the direction in one step.
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Hi folks,
I am going to find the band structure of a 1D photonic crystal waveguide by COMSOL. There is an example in application library for 2D photonic crystal with a 2D geometry. In the example the refractive index of materials are frequency dependent, and a nonlinear formulation is used to normalize the field in a unit cell and finding the frequency and so updating refractive indices. It is exactly the point that I need to understand completely, since material dispersion is important for me, too. However, I can not figure out how the nonlinear formulation for the field normalization works and how I can utilize the same principle for a 3D geometry. I would be really grateful if somebody can help me. 
Thanks for your attention,
Zeinab
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You can compute the photonic band structure of a 1D photonic crystal in 3D geometry in complete analogy with the example you mention from COMSOL's application library (Application ID:798). The main difference is in the normalization integral, which must be defined over volume instead of area and considering all components of the E field, instead of only the out-of-plane field Ez:
V = intop1(1)
nE = intop1(realdot(ewfd2.Ex,ewfd2.Ex) + realdot(ewfd2.Ey,ewfd2.Ey) + realdot(ewfd2.Ez,ewfd2.Ez))/V
In which case the ODE is still defined as:
1 [V^2/m^2] - nE
All the other instructions from the example should be relatively easy to extrapolate to 3D geometry. There is nevertheless one caveat as COMSOL Technical Support told me:
"What is less analogous however is how the solver defaults work. As it is a 3D model, you get a segregated solver. This is more suited for weakly coupled problems - in contrast, your global equation is only controlled by the coupling itself, making it singular when solved in its own step."
You must therefor us a fully coupled solver:
"Study 2 > Solver Configurations > Solution 2 > Stationary Solver 1, and select Fully Coupled."
I hope this can help you (if it not to late) or others to come.
Best,
Thibault Wildi
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Dear all:
I hope someone can give me some insight to this problem.
Considering that I have a micro size metallic particle. Lets say a symmetric Gold cubic particle, about 6 micrometers of lenght.
What physical framework do I have to use if I want to find the Electric Field distribution coming out from this particle ?
Will Maxwell Equations be enough for this case ? Ohm's Law ? some consideration of some Quantum Mechanical Effects ? Consideration of Plasmons ?
I'am posing this problem cuz I'm attempting to solve an Octahedral Gold particle of these dimensions in COMSOL Multiphysics, where I need to compute the E field distribution. Therefore I continue thinking if is as straightforward as to set the system of linear PDEs using just Maxwell Equations and Ohm's Law, and obtain physical representative results.
Please, any insight will be helpful
Regards ! :)
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An example would be the distribution of electrical charges in an electrolytic capacitor according to electrostatics (Gauss law) at a given electrical voltage on the capacitor.
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Hello everyone,
I am searching for references in numerical modelling of fully-coupled electromagnetism with FEM for high frequency applications? I am particularly focussed on induction heating of magnetic polymers with hysteresis losses at high frequency alternating external magnetic fields.
Any help is very much appreciated!
Thank you in advance!
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Dear. Maybe you can try: Numerical techniques in Electromagnetics. Matthew N. O. Sadiku.
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The transformation of two "colliding" photons into a pair of particle / anti-particle was experimentally observed already. But the observed particles are always electrically charged.
1. If such a transformation takes place in vacuum, and the pair annihilates after a short time, then no interaction with other real particles occurs (apart from virtual particles in vacuum). If under these circumstances a pair of magnetically charged particles were generated, could the mass of each particle roughly equal the mass of an "otherwise similar" electrically charged particle? I.e., if we permit the existence of magnetic monopoles at all for the moment, could we assume magnetic counterparts to electron and positron, for example, without immediately generating paradoxes? (The theoretical lower limit for the mass of magnetic monopoles in condensed matter is usually calculated as being much larger than the mass of an electron.)
2. If magnetic monopoles were generated by photon/photon collisions, do you think they could be / would be detected under the standard experimental conditions? (For example, the usual spiral shaped paths would occur only in a strong electric field instead of the usual magnetic field. And besides that, the use of a cloud chamber is incompatible with the above assumption "no interaction with other real particles".)
3. If the anwer to question 2 is "no", do you know of attempts to observe magnetic monopoles generated by two photons? (If I'm not mistaken previous attempts to prove the existence of magnetic monopoles were directed toward single, relatively long-lasting monopoles, not necessarily generated inside the experimental setup.)
Many thanks in advance for answers and links to publications related to this topic!
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