Condensed Matter

2107 Submissions

[2] viXra:2107.0171 [pdf] replaced on 2025-09-21 09:51:27

A Dictionary of Modern Italian, the Graphical Law and Dictionary of Law and Administration, 2000, National Law Development Foundation

Authors: Anindya Kumar Biswas
Comments: 27 Pages. A mistake in plotting BW(c=0.01) has been rectified

We study A Dictionary of Modern Italianby John Purves.We draw the natural logarithm of thenumber of entries, normalised, starting with a letter vs the natural logarithm of therank of the letter, normalised( unnormalised).We conclude that the Dictionary can be characterised by BP(4,βH=0) i.e. amagnetisation curve for the Bethe-Peierls approximation of the Isingmodel with four nearest neighbours in absence of external magnetic field. H is external magnetic field,β is 1/(k_B T) where, T is temperature andk_B is the Boltzmann constant. Moreover, we compare the Italian language with other Romance languages. These are the Spanish, the Basque and the Romanianlanguages respectively. On the top of it, we compare A Dictionary of Modern Italian withDictionary of Law and Administration, 2000, by National Law Development Foundation.We find a tantalizing similarity between the Modern Italian and the jargon of law and administartion.
Category: Condensed Matter

[1] viXra:2107.0145 [pdf] submitted on 2021-07-22 21:07:23

Material-Structure Integrated Design for Ultra-Broadband Microwave Metamaterial Absorber

Authors: Mengyue Peng, Faxiang Qin, Liping Zhou, Huijie Wei, Zihao Zhu, Xiaopeng Shen
Comments: 26 Pages.

We propose herein a method of material-structure integrated design for broadband absorption of dielectric metamaterial, which is achieved by combination of genetic algorithm and simulation platform. A multi-layered metamaterial absorber with an ultra-broadband absorption from 5.3 to 18 GHz (a relative bandwidth of as high as 109%) is realized numerically and experimentally. In addition, simulated results demonstrate the proposed metamaterial exhibits good incident angle and polarization tolerance, which also are significant criteria for practical applications. By investigating the working principle with theoretical calculation and numerical simulation, it can be found that merging of multiple resonance modes encompassing quarter-wavelength interference cancellation, spoof surface plasmon polariton mode, dielectric resonance mode and grating mode is responsible for a remarkable ultra-broadband absorption. Analysis of respective contribution of material and structure indicates that either of them plays an indispensable role in activating different resonance modes, and symphony of material and structure is essential to afford desirable target performance. The material-structure integrated design philosophy highlights the superiority of coupling material and structure and provides an effective comprehensive optimization strategy for dielectric metamaterials.
Category: Condensed Matter