scholarly journals Kinetic waves - dynamics of light propagation

2018 ◽  
Vol 14 (1) ◽  
pp. 5248-5267
Author(s):  
Luciano M.R. Rota
Keyword(s):  
Electromagnetic Waves ◽  
Light Propagation ◽  
Inertial Force ◽  
Natural Phenomenon ◽  
Radar Astronomy ◽  
Depth Analysis ◽  
The Galaxy ◽  
The Doppler Effect ◽  
And Behavior ◽  
Quasar 3C 273

An in-depth analysis of the dynamics connected to the Doppler-effect brings clear light to elements of contradiction with the original ground on which the axiom of the constancy of lightspeed was based. Thereby, with regard to electromagnetic phenomenology, the duality waves/particles and the wavy dynamic of light-propagation suggest the existence of a natural kind of waves, which differently from the classic ones, are originating by kinetic thrust and propagating, also though vacuum, by inertial force. The model taken into consideration,  to which has been given the name of “kinetic waves”  is, like the classic one, a concretely existing natural phenomenon which can also be visually perceived if produced on molecular scale. Moreover kinetic waves seem to offer many more points of similarity, in dynamic and behavior, with the electromagnetic waves,  than the classic model. Applying the obtained results on the astrophysical field, taking as example the quasar 3C-273,  the recently found, most far galaxy GN-z11 and the galaxy NGC 224 (better known as Andromeda), can  mathematically and concretely be  sustained that none of  the energy sources we optically perceive, showing a Doppler-shift, nor is approaching nor regressing. In the appendix, a suggested and accurately described experiment on base of Radar Astronomy to possibly confirm the validity of the model presented by this article.

scholarly journals Research on Kinetic Waves and Applications

2017 ◽  
Vol 9 (3) ◽  
pp. 8
Author(s):  
Luciano Rota
Keyword(s):  
Natural Kind ◽  
Electromagnetic Waves ◽  
Mathematical Proof ◽  
Inertial Force ◽  
Red Shift ◽  
Natural Phenomenon ◽  
Radar Astronomy ◽  
Molecular Scale ◽  
And Behavior ◽  
Quasar 3C 273

The duality waves/particle and the dynamic of propagation of electromagnetic emanations suggest the existence of a natural kind of waves, which differently from de classic ones, are originating by kinetic thrust and propagating, also though vacuum, by inertial force. The model taken into consideration, to which has been given the name of “kinetic waves” is, like the classic one, a concretely existing natural phenomenon which can also be visually perceived if produced on molecular scale. Results suggest, by giving consistent mathematical proof, that kinetic waves offer many more points of similarity, in dynamic and behavior, than the classic ones, which were taken, since the discovery of electromagnetic waves, as basic model.Applying the obtained results relatively to this model, to the astrophysical red-shift, taking as example the quasar 3C-273 and the recently found, most far galaxy GN-z11, we could find a mathematical sustainable and logic answer about still unsolved problems with regard to the origin and the dynamic of the universe.In the appendix, a suggested and accurately described experiment on base of Radar Astronomy to possibly confirm the validity of this model.

scholarly journals Deep Subwavelength Power Concentration-Based Hyperbolic Metamaterials

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Amanpreet Kaur ◽  
Saptarshi Banerjee ◽  
Wangshi Zhao ◽  
Jayanti Venkataraman ◽  
Zhaolin Lu
Keyword(s):  
Electromagnetic Waves ◽  
Light Propagation ◽  
Spot Size ◽  
Diffraction Limit ◽  
Evanescent Waves ◽  
Hyperbolic Metamaterials ◽  
Preferred Direction ◽  
Propagating Waves ◽  
Medium Design ◽  
Collimated Beam

Hyperbolic metamaterials can manipulate electromagnetic waves by converting evanescent waves into propagating waves and thus support light propagation without diffraction limit. In this paper, deep subwavelength focusing (or power concentration) is demonstrated both numerically and experimentally using hyperbolic metamaterials. The results verify that hyperbolic metamaterials can focus a broad collimated beam to spot size of ~λ0/6 using wired medium design for both normal and oblique incidence. The nonmagnetic design, no-cut-off operation, and preferred direction of propagation in these materials significantly reduce the attenuation in electromagnetic waves.

FDTD Simulation of Light Propagation Inside a-Si:H Structures

2010 ◽  
Vol 1245 ◽  
Author(s):  
Alessandro Fantoni ◽  
Pedro Pinho
Keyword(s):  
Light Absorption ◽  
Electromagnetic Waves ◽  
Light Propagation ◽  
Light Transmission ◽  
Visible Spectrum ◽  
Propagation Model ◽  
Interface Roughness ◽  
Fdtd Simulation ◽  
Doping Density ◽  
Surface And Interface

AbstractWe have developed a computer program based on the Finite Difference Time Domain (FDTD) algorithm able to simulate the propagation of electromagnetic waves with wavelengths in the range of the visible spectrum within a-Si:H p-i-n structures. Understanding of light transmission, reflection and propagation inside semiconductor structures is crucial for development of photovoltaic devices. Permitting 1D analysis of light propagation over time evolution, our software produces results in well agreement with experimental values of the absorption coefficient. It shows the light absorption process together with light reflection effects at the incident surface as well as at the semiconductor interfaces. While the effects of surface reflections are easily taken into account by the algorithm, light absorption represents a more critical point, because of its non-linear dependence from conductivity. Doping density, density of states and photoconductivity calculation are therefore crucial parameters for a correct description of the light absorption-transmission phenomena through a light propagation model.The results presented in this paper demonstrate that is possible to describe the effect of the light-semiconductor interaction through the application of the FDTD model to a a-Si:H solar cell. A more general application of the model to 2D geometries will permit the analysis of the influence of surface and interface roughness on the device photovoltaic efficiency.

What does my eye tell your mind?

1999 ◽  
Vol 22 (6) ◽  
pp. 951-952 ◽  
Author(s):  
Rebecca M. Frumkina
Keyword(s):  
Natural Phenomenon ◽  
Color Experience ◽  
And Behavior

Palmer's suggestion that color might serve as an appropriate field in which to test the hypotheses on the relations among brain, mind, and behavior is misleading. Human color experience as related to mind must be considered as a cultural, as well as a natural phenomenon. It is important to avoid approaching facts of language as mere nomenclature; otherwise, concepts are reduced to percepts.

scholarly journals COSMOLOGICAL CONSTANT AND THE SPEED OF LIGHT

2001 ◽  
Vol 10 (01) ◽  
pp. 41-48 ◽  
Author(s):  
W. R. ESPÓSITO MIGUEL ◽  
J. G. PEREIRA
Keyword(s):  
Gravitational Field ◽  
Cosmological Constant ◽  
Electromagnetic Waves ◽  
Light Propagation ◽  
Wave Optics ◽  
Speed Of Light ◽  
Positive Cosmological Constant ◽  
Velocity Of Light ◽  
Refractive Medium ◽  
The Relationship

By exploring the relationship between the propagation of electromagnetic waves in a gravitational field and the light propagation in a refractive medium, it is shown that, in the presence of a positive cosmological constant, the velocity of light will be smaller than its special relativity value. Then, restricting again to the domain of validity of geometrical optics, the same result is obtained in the context of wave optics. It is argued that this phenomenon and the anisotropy in the velocity of light in a gravitational field are produced by the same mechanism.

On Mechanics of Light Propagation in Free Space with Final Temperature

2007 ◽  
Vol 3 (2) ◽  
pp. 220-231
Author(s):  
M. Ja. Ivanov ◽  
V.K. Mamaev
Keyword(s):  
Exact Solutions ◽  
Free Space ◽  
Electromagnetic Waves ◽  
Light Propagation ◽  
Longitudinal Component ◽  
Final Temperature ◽  
Final Density ◽  
Propagation Of Light ◽  
Waves Propagation ◽  
Modified Theory

Features of electromagnetic waves propagation of light range are considered in free space with final temperature 2.725K. The presence in space of temperature (and final density) allows justification to introduce the longitudinal component of electromagnetic field. A modified theory of electromagnetic waves propagation in free space is offered.  Exact solutions of the nonlinear equations system in the presence of electric and gasdynamic interaction are obtained. Some of demonstrated exact solutions have a nature of continues and decretive spectrum.

Electromagnetic radiation and inertial forces

2019 ◽  
Vol 32 (4) ◽  
pp. 480-483
Author(s):  
Nasko Elektronov ◽  
Zhivko Kushev
Keyword(s):  
Electromagnetic Radiation ◽  
Doppler Effect ◽  
Inertial Force ◽  
Spectral Shift ◽  
Inertial Forces ◽  
Spectral Shifts ◽  
Nearby Stars ◽  
The Doppler Effect

The influence of the Coriolis inertial force generated by the orbital and spin motions of distant objects on the electromagnetic radiation energies during the exchange of photons between such objects has been considered. A red or blue spectral shift occurrence in a passive observation mode that is not associated with the Doppler effect or other known effects has also been shown. The relations found are used to calculate the spectral shifts for several nearby stars from our galaxy, as well as the spectral shifts of several galaxies. The results are close to the values currently observed.

Research Productivity in Development Communication in the Philippines

2016 ◽  
pp. 166-173
Author(s):  
Rotacio Gravoso ◽  
Ian Navarrete ◽  
Ian Kim Gahoy
Keyword(s):  
Research Productivity ◽  
The Philippines ◽  
Scientific Discipline ◽  
Development Communication ◽  
Research Organizations ◽  
Depth Analysis ◽  
Number Of Publications ◽  
And Behavior ◽  
The University ◽  
Number Of Citations

Pioneered in the 70s by Nora Quebral of the University of the Philippines at Los Baños, Development Communication (DevCom) is now recognized globally as a scientific discipline. As such, it is now a part of the research and development (R&D) agenda of national and international research organizations. For almost four decades, no study has been conducted to find out the research productivity in DevCom in the Philippines. We conducted in-depth analysis on the total number of publications and total number of citations of DevCom publications collected from Thomson ISI database. From the 70s to the present, 74 articles were published. The most dominant domains were on health communication (31.08 %) and agricultural communication (29.72%). On the other hand, the most predominant approaches were social mobilization (44.59%) and behavior change (41.89%). With 74 articles, it can be concluded that research productivity of DevCom in the Philippines is low. This paper presents ways to improve publication performance in DevCom in the country. Future studies may focus on identifying the factors that facilitate or impede publication performance of DevCom researchers and educators.

scholarly journals Mutual Clutter Suppression Techniques for FM Sonars

2016 ◽  
Vol 41 (4) ◽  
pp. 721-729 ◽  
Author(s):  
Jacek Marszal ◽  
Mariusz Rudnicki ◽  
Andrzej Jedel ◽  
Roman Salamon ◽  
Iwona Kochańska
Keyword(s):  
Computer Simulations ◽  
Frequency Modulation ◽  
Doppler Effect ◽  
Real Life ◽  
Clutter Suppression ◽  
Life Conditions ◽  
Depth Analysis ◽  
Signal Differentiation ◽  
The Doppler Effect ◽  
Frequency Modulations

AbstractThe article presents methods that help in the elimination of mutual clutter as well as the consequences of two FM sounding signal sonars operating in the same body of water and frequency band. An in-depth analysis of mutual clutter was carried out. The effects of sounding signal differentiation were determined, as was the Doppler effect on mutual clutter suppression. One of the methods analysed is of particular interest in a situation in which collaborating sonars are operating in opposite frequency modulation directions. This method is effective for both linear and hyperbolic frequency modulations. A formula was derived, identifying exactly how much quantities of clutter may be lessened. The work included comprehensive computer simulations and measurements as well as tests in real-life conditions.

scholarly journals Application of the Mathieu’s equation for a design of a photonic crystal supporting surface electromagnetic waves

2015 ◽  
Vol 4 (3) ◽  
pp. 17
Author(s):  
E. Rostova ◽  
G. Dietler ◽  
S. K. Sekatskii
Keyword(s):  
Differential Equation ◽  
Refractive Index ◽  
Photonic Crystal ◽  
Electromagnetic Waves ◽  
Light Propagation ◽  
Multilayer Structures ◽  
Supporting Surface ◽  
Mathieu’S Equation ◽  
Fundamental Understanding ◽  
Surface Electromagnetic Waves

Nowadays, unique characteristics of surface electromagnetic waves, particularly, surface plasmons supported by a specially designed photonic crystal find numerous applications. We propose to exploit an evident analogy between such a photonic crystal and a structure with a sine-modulated refractive index. The light propagation inside the latter is described by the famous Mathieu’s differential equation. This application of the Mathieu’s equation can be useful for a design of multilayer structures, and also for fundamental understanding of electromagnetic phenomena in inhomogeneous media.

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