poynting

Download

This program is the ultimate tool in order to study the behavior of Monochromatic Homogenous Plane Waves when traveling through different mediums. In this first version of the program, only mediums with no loss are contemplated, but it is indeed capable of calculating complex impedances, which appear when there are mediums with a thickness that is not a multiple of the wavelength. For any imaginable case, this application draws the Standing Wave Diagram and specifies the impedances and reflection coefficients for every discontinuity.

The program has a very simple interface and is really easy to work. It is recommended to use it for the subject named ‘Fields and Waves in Telecommunication’ (COTE), a part of the Degree in Telecommunications Engineering of the Technical University of Madrid (UPM)

For any doubts regarding the application, please e-mail us at: poyting.slp@gmail.com.

Try the new Webapp:

Or you can download it for Windows (.exe) …

Note: If when downloading the application, a security warning appears, it is because we do not own an editor certificate, due to our limited resources, please ignore the warning. The program is 100% malware free.

POYNTE Announces Tour with Trapt and Sons of Texas!!!

Press Photo Courtesy of Jeff Mintline (MintyPics.Com) Atlanta, GA – Hard-hitting rock quintet, POYNTE, have announced their Summer tour that includes 17 dates with Platinum selling artists Trapt, as well as the fast rising Razor & Tie signees, Sons of Texas. The 28-day trek began July 17th and runs through August 15th. The tour has the band crisscrossing the USA, playing in 14 states. POYNTE is…

View On WordPress

arxiv.org
[1507.07804] Does the Poynting vector always represent electromagnetic power flow?

[ Authors ]
Changbiao Wang
[ Abstract ]
Poynting vector as electromagnetic power flow has prevailed over one hundred years in the community. However in this paper, it is shown from Maxwell equations that the Poynting vector may not represent the electromagnetic power flow for a plane wave in a non-dispersive, lossless, non-conducting, anisotropic uniform medium; this important conclusion revises the conventional understanding of Poynting vector. It is also shown that this conclusion is clearly supported by Fermat’s principle and special theory of relativity.

arxiv.org
[1507.07253] Linear guided waves in hyperbolic slab waveguide. Dispersion relations

[ Authors ]
Ekaterina I. Lyashko, Andrey I. Maimistov
[ Abstract ]
Guided waves modes in a slab waveguide formed from the isotropic dielectric layer embedded by hyperbolic materials are investigated. Optical axis is normal to the slab plane. The dispersion relations for TE and TM waves are found. The differences between hyperbolic waveguide and conventional one are demonstrated. In particular, for each TM mode of hyperbolic waveguide there are two cut-off frequencies and the number of modes is limited. For the TE and TM modes Poynting vector component along the wave’s propagation axis could be equal to zero.

Download update version of the BlackBerry Poynt app

Download update version of the BlackBerry Poynt app

I lately stated you that it is now visual for BlackBerry 10 & for a loose obtain it really is similar of the ones ‘will have to have’ programs for your software. The preferred BlackBerry app Poynt has nonetheless once more were given an replace including a couple of new boasts to the desk. BlackBerry units that arrive with GPS chasing inside them are twists that experience a specific more or less…

View On WordPress

Download update version of the BlackBerry Poynt app

Download update version of the BlackBerry Poynt app

I lately stated you that it is now visual for BlackBerry 10 & for a loose obtain it really is similar of the ones ‘will have to have’ programs for your software. The preferred BlackBerry app Poynt has nonetheless once more were given an replace including a couple of new boasts to the desk. BlackBerry units that arrive with GPS chasing inside them are twists that experience a specific more or less…

View On WordPress

arxiv.org
[1507.06627] Dust and Polycyclic Aromatic Hydrocarbon in the HD 34700 Debris Disk

[ Authors ]
Ji Yeon Seok, Aigen Li
[ Abstract ]
The debris disk around the Vega-type star HD 34700 is detected in dust thermal emission from the near infrared (IR) to millimeter (mm) and submm wavelength range. Also detected is a distinct set of emission features at 3.3, 6.2, 7.7, 8.6, 11.3 and 12.7 $\mu$m, which are commonly attributed to polycyclic aromatic hydrocarbon (PAH) molecules. We model the observed dust IR spectral energy distribution (SED) and PAH emission features of the HD 34700 disk in terms of porous dust and astronomical-PAHs. Porous dust together with a mixture of neutral and ionized PAHs closely explains the dust IR SED and PAH emission features observed in the HD 34700 disk. Due to the stellar radiation pressure and Poynting-Robertson drag together with the photodissociation of PAHs, substantial removal of dust and PAHs has occurred in the disk, and continuous replenishment of these materials is required to maintain their current abundances. This implies that these materials are not primitive but secondary products probably originating from mutual collisions among planetesimals, asteroids, and comets.

arxiv.org
[1507.07477] Radiation reaction from electromagnetic fields in the neighborhood of a point charge

[ Authors ]
Ashok K. Singal
[ Abstract ]
From the electromagnetic field in the neighborhood of a “point charge” in arbitrary motion, it is shown that the Poynting flux across a spherical surface of vanishingly small radius, surrounding the charge in its instantaneous rest-frame, is nil. The absence of the Poynting flux in the neighborhood of such a charge explicitly shows that there are no radiative losses from an instantly stationary point charge. While this might appear to contradict Larmor’s formula for radiation, nevertheless, it is in complete conformity with energy conservation. After all a charge stationary, even if for an instant, possesses no kinetic energy at the moment that could be lost into radiation. Further, from the rate of electromagnetic momentum flow, calculated using the Maxwell stress tensor, across a surface surrounding the charge, the radiation reaction is determined which turns out to be proportional to the first time derivative of the acceleration of the charge. The power loss due to radiation reaction, hitherto derived in the literature from the self-force of a small charged sphere, has ever been considered to be in discordance with the Poynting flux, the latter supposed to be instead giving the familiar Larmor’s formula with radiated power proportional to the square of acceleration. It is further shown that in the case of synchrotron radiation, Larmor’s formula leads to a potentially wrong conclusions about the pitch angle changes of the radiating charges, and that only the radiation reaction formula yields a correct result, consistent with the special relativity.