Results 41 to 50 of about 5,083 (199)

Sunflower Array Antenna with Adjustable Density Taper

open access: yesInternational Journal of Antennas and Propagation, Volume 2009, Issue 1, 2009., 2009
A deterministic procedure to design a nonperiodic planar array radiating a rotationally symmetric pencil beam pattern with an adjustable sidelobe level is proposed. The elements positions are derived by modifying the peculiar locations of the sunflower seeds in such a way that the corresponding spatial density fits a Taylor amplitude tapering law which
Maria Carolina Viganó   +5 more
wiley   +1 more source

Periods of Leonardo Sequences and Bivariate Gaussian Leonardo Polynomials

open access: yesDüzce Üniversitesi Bilim ve Teknoloji Dergisi
In this study, we investigate the periodic characteristics of Leonardo, Leonardo-Lucas, and Gaussian Leonardo sequences, presenting our findings through lemmas and theorems.
Selime Beyza Özçevik, Abdullah Dertli
doaj   +1 more source

A New Class of Leonardo Hybrid Numbers and Some Remarks on Leonardo Quaternions over Finite Fields

open access: yesMathematics, 2023
In this paper, we present a new class of Leonardo hybrid numbers that incorporate quantum integers into their components. This advancement presents a broader generalization of the q-Leonardo hybrid numbers.
Elif Tan, Diana Savin, Semih Yılmaz
doaj   +1 more source

A Clifford algebra associated to generalized Fibonacci quaternions

open access: yes, 2014
In this paper we find a Clifford algebra associated to generalized Fibonacci quaternions. In this way, we provide a nice algorithm to obtain a division quaternion algebra starting from a quaternion non-division algebra and vice ...
Flaut, Cristina
core   +1 more source

5D Hyperchaotic Image Encryption Scheme Based on Fibonacci Q‐Matrix

open access: yesComplexity, Volume 2024, Issue 1, 2024.
This article proposed an image encryption scheme along a novel five‐dimensional hyperchaotic system and a Fibonacci Q‐matrix (FQ‐matrix) for gray images. This designed algorithm follows two key stages: the confusion stage and the diffusion stage. In the confusion step and diffusion step, the placement of the plain image pixels is replaced by a 5D ...
Geeta Biban   +4 more
wiley   +1 more source

Embeddings into Hyper Petersen Networks: Yet Another Hypercube‐Like Interconnection Topology

open access: yesVLSI Design, Volume 2, Issue 4, Page 335-351, 1995., 1995
A new hypercube‐like topology, called the hyper Petersen (HP) network, is proposed and analyzed, which is constructed from the well‐known cartesian product of the binary hypercube and the Petersen graph of ten nodes. This topology is an attractive candidate for multiprocessor interconnection having such desirable properties as regularity, high symmetry
Sajal K. Das   +2 more
wiley   +1 more source

The Abbaco Tradition (1300-1500): its role in the development of European algebra [PDF]

open access: yes, 2008
Abbaco algebra is a coherent tradition of algebraic problem solving mostly based in the merchant cities of fourteenth and fifteenth-century Italy. This period is roughly situated between two important works dealing with algebra: the Liber Abbaci by ...
Heeffer, Albrecht
core   +1 more source

Some Boundedness, Convergence, and Oscillatory Results of Generalized Fibonacci‐Type and Fibonacci Ratio Recurrences

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2024, Issue 1, 2024.
Some boundedness and convergence properties of generalized Fibonacci’s‐type recurrences and their associated iterated recurrence ratios between pairs of consecutive terms are discussed under a wide number of initial conditions. Also, a more general, so‐called (k, q) Fibonacci’s recurrence and the associated Fibonacci’s ratio recurrences are ...
Manuel De la Sen, V. Ravichandran
wiley   +1 more source

Art and Science: Where Numerology and Mathematics Touch the Lung

open access: yesCanadian Respiratory Journal, Volume 1, Issue 4, Page 241-247, 1994., 1994
Mathematical analysis in the physical seiences has a long history that reveals not only a rich harvest of fundamental insights but also leads to a wonderment at the in trinsically formal beauty in nature. Rigorous analysis or form and function in the biological sciences has been a more recent innovation.
S Marsh Tenney
wiley   +1 more source

One-dimensional disordered photonic structures with two or more materials

open access: yes, 2018
Here we would like to discuss the light transmission modulation by periodic and disordered one dimensional (1D) photonic structures. In particular, we will present some theoretical and experimental findings highlighting the peculiar optical properties of:
Bellingeri, Michele   +11 more
core   +1 more source

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