Raul Perez-Enriquez

Raul Perez-Enriquez
Universidad de Sonora (Unison) · Department of Physics (Retired)

Doctor of Science

About

49
Publications
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Citations
Introduction
My current reseach interests is Gnomonics and Archaeoastronomy.
Additional affiliations
September 1986 - present
Universidad de Sonora (Unison)
Position
  • MTC Titular 'A'

Publications

Publications (49)
Book
Full-text available
BILINGUAL EDITION PRESENTATION As a theoretical physicist, Raúl Pérez-Enríquez has developed his imagination at the same time that he has kept intact his sense of wonder. Both conditions are essential when looking for scientific truth, but they are also features that should be emphasized in the field of literature. This book of short stories, crea...
Article
The Armenian highlands contain numerous remote sites featuring petroglyphs. Many of these rock carvings are pastoral depictions of animals, while others are abstract and complex, and one example of the latter, believed by archaeologists to date back to the Late Bronze Age (LBA), is found on an isolated site on Sevsar Mountain at an altitude of abou...
Book
Full-text available
Tras dos décadas de investigación sobre las sombras de un gnomon unitario, el autor nos entrega este libro donde se documentan y valoran con precisión, la influencia del gnomon y sus sombras en los fundamentos de la historia de la Matemática, la Astronomía, el Urbanismo. En esta exposición, las sombras solsticiales sobresalen como elemento que debi...
Book
Full-text available
El presente libro es una interpretación del Zhou Bi Suan Jing, texto antiguo de China y un clásico de las matemáticas. Este análisis descubre una cosmovisión (que gira en torno al Tao) desarrollada desde un remoto origen hasta su compilación en el siglo II a. C., y describe un universo formado por un Cielo plano y una Tierra plana. La interpretació...
Article
A millenary description of the world as conceived by Chinese culture, appears in the Zhou bi Suanjing or "The book of the Gnomon and the Circular Paths of the Heaven", according Needham. Situated at Zhou (a legendary city) the dimensions of the earth and heaven, including the size of the Sun are presented in this book. The Chinese Gaì Ti'an astrono...
Article
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En el mes de mayo de 2019 se cumplió el aniversario número quinientos del fallecimiento del Hombre Universal por excelencia: Leonardo de Vinci. Entre las muchas disciplinas que Leonardo cultivó están la pintura y otras formas de creación artística; sin embargo, su interés y curiosidad lo llevaron a abarcar un sinnúmero de ramas de la Ciencia: Matem...
Preprint
Full-text available
A document compiled around 100 BCE, the Zhou bi Suanjing (Zhoubi now on) has been recognized, in the past, as a mathematical and astronomical document; and, in this framework, its special features have been analysed. However, its relation with the actual world has been omitted. Using the gnomonic data of the Zhoubi (gnomon's height and its solstice...
Book
Full-text available
Presentan las "Aventuras de El Taquión por el espacio-tiempo' 30 de Agosto de 2012 Relatos que giran en torno a conceptos de física moderna y topología, con historias que entretejen la ficción científica y viajes fantásticos, forman parte del libro "Aventuras de El Taquión por el espacio-tiempo', que se presentó este jueves en el Departamento de Fí...
Article
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Vršac Circles are a set of five, practically, concentric circles located in a plain of western Serbia. There have not been any systematic archaeological research in the zone but some exploration work indicate a possible date for the earthwork to be around five thousand years ago. In this paper, we present a sequential analysis of the sizes (diamete...
Article
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One of the aspects that suggest the existence of a Power, being this religious or political, is the presence of calendrical structures. The obsession of time measurement and their manifestations can be identified easily in the Maya culture. Examples such as “El Castillo” in Chicheni-Iza, “El Templo Redondo” of Mayapán, among many others, show the k...
Book
Full-text available
La Relatividad y las paradojas usando GeoGebra Raúl Pérez-Enríquez El libro que tiene en sus manos, fue concebido para clarificar los conceptos de espaciotiempo de la teoría de la relatividad especial (TRE) y familiarizarlo en el manejo de los diagramas de Minkowski. Uno de los objetivos explícitos del libro es la solución de varias paradojas relac...
Presentation
Full-text available
Information about the availability of My book ”Adventures of The Tachyon through Space Time Aventuras de ”El Taquión” por el Espacio Tiempo.
Article
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Un aspecto cultural que sugiere la existencia de un Poder, sea éste religioso o político, es la presencia de estructuras calendáricas. La obsesión por la medición del Tiempo y sus manifestaciones es una de las características de la Cultura Maya. Ejemplos como el Castillo en ChichenItzá y el Templo Redondo de Mayapán muestran el nivel de conocimient...
Article
Full-text available
Recientemente, he propuesto un nuevo enfoque de análisis para una de las tabletas más asombrosas de la antigua Mesopotamia: la Tableta Plimpton 322. La nueva visión de esta tableta se basa en considerarla como una tabla de registro de sitios sumerios; apoyándose en la propuesta de que las ternas de la tableta representan triángulos de Pitágoras Dio...
Article
Full-text available
Recientemente, he propuesto un nuevo enfoque de análisis para una de las tabletas más asombrosas de la antigua Mesopotamia: la Tableta Plimpton 322. La nueva visión de esta tableta se basa en considerarla como una tabla de registro de sitios sumerios; apoyándose en la propuesta de que las ternas de la tableta representan triángulos de Pitágoras Dio...
Article
Full-text available
Several years ago, while analyzing the Monument of Stonehenge, we suggested the possible use of a concept now known as the gnomonic factor. The evidences we have collected along these years points towards the existence of gnomonic paradigms in ancient cultures. However, few or almost no written evidence appears developing this idea which could be w...
Article
Full-text available
Apollo, the Sun God, is one of the most prominent deities in the Ancient Greek religion. The temples and the oracles dedicated to the cult of Apollo correlate the selection of their geographical site with their special orientation, as based on ancient astronomical practices of symbolic and ritual importance. By studying the Ancient Greek temples, a...
Article
Full-text available
A discussion about a possible origin of the engravings at Newgrange Mound is given. The engravings are one of the most famous megalithic tombs in Ireland that could be evidence of 'pinhole optics' used for solar observations. Also, they could represent an early manifestation of the construction of a specially oriented astronomical instrument in anc...
Conference Paper
Full-text available
Submitted for the IT05 Meeting of The American Physical Society Sorting Category: 2.0 (C) Local magnetic moment in Co-doped BaFe2As2 JACQUES SOULLARD, Univ Nacl Autonoma de Mexico, RAUL PEREZ-ENRIQUEZ, Universidad de Sonora, ILYA G. KAPLAN, Univ Nacl Autonoma de Mexico — We present a comparative calculation of the high critical temperature supercon...
Article
Full-text available
One of the most astonishing tablets found in ancient Mesopotamia is the well-known Plimpton 322 Tablet. This tablet is a piece of clay recording fifteen rectangle triangles with integer number sides. It has been abundantly analysed and one of its most recent interpretations is that from Britton et al. (2011) who relate the Pythagorean triples with...
Article
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We present a comparative calculation of the electronic structure of the high critical temperature superconductor Co-doped ${\text{BaFe}}_{2}{\text{As}}_{2}$ and its parent compound at the electron correlation level by the embedded cluster method; the electron correlation is calculated through the second-order M\o{}ller-Plesset perturbation theory....
Conference Paper
Full-text available
La observación del Sol en la antigüedad fue, seguramente, una actividad que permitió a las culturas ancestrales analizar el paso del tiempo. En Egipto, existen evidncias muy claras de ello. De hecho, como R. Calvino afirma, desde el primer momento en que el hombre se yergue sobre sus dos pies, él se puede reconocer como gnomon y se percata de su so...
Article
Full-text available
A modification to the gnomonic factor (fg) (Perez-Enriquez 2000) using the concept of Plato's triangle is presented. With the aid of the platonic gnomonic factor (fgp) as we called it, we found that the oracles mentioned by Herodotus in his History (Dodona in Greece and Ammon in Oasis Siwa, Egypt) could have been placed there because the noon shado...
Article
Full-text available
Esa tarde, a tan solo tres días del evento esperado, la salida del Sol de invierno, los guías hacían los preparativos para la observación. Durante años habían estado construyendo, aquí en Newgrange, en este paraje del Valle de Boyne, el observatorio. Un par de generaciones de vecinos de este lugar habían logrado construir un pasaje de rocas alinead...
Conference Paper
Full-text available
A discussion about the possible utilization of "pinhole optics" for solar observation in ancient times is presented. Evidence of images and engravings from United Kingdom (Stonehenge Monument) and Ireland (Newgrange Mound) are given to support the hypothesis that in antiquity optical instruments could have been used. Two are the main examples shown...
Article
Full-text available
A modification to the gnomonic factor using the concept of triangle of Plato is presented. With the aid of the platonic gnomonic factor (fgp) as we called it, we find that the oracles mentioned by Herodotus in his History, Dodona in Greece and Ammon in Oasis Siwa, Libya, were placed there because the noon shadow of Sun of a gnomon formed, back in 2...
Article
Full-text available
Nuevos caminos para estudiar la superconductividad se han abierto en años recientes. Hace unos cuatro años se descubrió que la superconductividad admite la presencia de átomos magnéticos como el hierro, en las estructuras de los compuestos. Magnetismo y superconductividad ya no son fenómenos antagónicos en ciertos materiales: conocidos como FeAsSC....
Article
Full-text available
Este año 2011 se cumplen los primeros cien años del descubrimiento de la superconductividad. Realizar la caracterización de este estado de la materia llevó a los investigadores varios años; de hecho se contó con una teoría microscópica hasta bien entrada la década de los 50's: la teoría BCS. En este trabajo se aborda específicamente una de las tres...
Article
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We develop the classical and quantum theory of a spinning particle moving in a Mobius strip. We first propose a Lagrangian for such a system and then we proceed to quantize the system via the constraint Hamiltonian system formalism. Our results may be of particular interest in several physical scenarios, including solid state physics and optics. In...
Article
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A partir del estudio del monumento conocido como Stonehenge, ubicado en Inglaterra, se definió el factor gnomónico. Este factor toma en cuenta las sombras producidas por un gnomon cuando el sol pasa por el meridiano del lugar (mediodía) en fechas específicas. Para el caso de Stonehenge, se consideran las fechas del Solsticio de Verano y del Solstic...
Thesis
Full-text available
La molécula de hidrógeno, después del ión molecular de hidrógeno, es la más sencilla de todas las moléculas y por ello, ha sido estudiada ampliamente a lo largo de la historia. Ha sido, gracias a estos trabajos, comprendida cada vez con mayor detalle y ha permitido, en consecuencia, la evolución del conocimiento más general de los enlaces molecular...
Article
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La molécula de hidrógeno es el compuesto más sencillo en la naturaleza, después de ión molecular. Formada por dos protones y dos electrones, esta molécula ha permitido realizar el estudio de muchos procesos físicos pero su total comprensión está aun por llegar. En este reporte se destaca su renovada importancia debida a su utilización como energéti...
Article
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A two-dimensional Laplace equation is separable in elliptic coordinates and leads to a Chebyshev-like differential equation for both angular and radial variables. In the case of the angular variable ν (-1 ≤ ν ≤1); the solutions are the well known first class Chebyshev polynomials. However, in the case of the radial variable ε (1≤ε < ∞) it is necess...
Article
Full-text available
The conventional representation of the H2 molecule characterizes a 4-body system due to the independence of the orbitals of the two valence electrons as requested by quantum chemistry, under which conditions no exact solution is possible. To over come this problem, Santilli and Shillady introduced in 1999 a new model of the H2-molecule in which the...
Article
Full-text available
In spite of that Chebyshev equation is very similar to Legendre equation, in the sense that their first solution span an orthogonal basis in [−1, 1], their second solution is very different in nature, namely, in the case of Legendre equation the functions Qn have a singularity at ±1 while Chebyshev ones are well behaved in all the interval. Regardi...
Article
Full-text available
In spite of that Chebyshev equation is very similar to Legendre equation, in the sense that their first solution span an orthogonal basis in [−1, 1], their second solution is very different in nature, namely, in the case of Legendre equation the functions Q n have a singularity at ±1 while Chebyshev ones are well behaved in all the interval. Regard...
Conference Paper
Full-text available
We analyze the charge distribution structure of a Hydrogen molecule under the Restricted Three-body Santilli-Shillady Model. • Using the stable isoelectronium model, a particle with M=2me and q=-2e, we found a compatible ground state of which overcomes the problems of that developed by Aringazin and Kucherenko. • Our model makes use of energies and...
Article
Full-text available
We analyze the charge distribution structure of a Hydrogen molecule under the Restricted Three-body Santilli-Shillady Model. Using the stable isoelectronium model, a particle with M=2,e and q=-2,, we found a compatible ground state of H2 which overcomes the problems of that developed by Aringazin and Kucherenko. Our model makes use of energies and...
Article
Full-text available
Using a professional program from Gaussian Inc. and the SCF method implemented therein, we have obtained the energy for a Hydrogen molecule under confinement in a Single Wall Carbon Nanotube (SWNT). The energy results from these ab initio calculations are analysed with special attention to the molecule oriented perpendicularly to the nanotube axis....
Article
Full-text available
Separation of the two-dimensional Laplace equation in elliptic coordinates leads to a Chebyshev-like differential equation for both the "angular" and "radial" variables, namely (, ) η ξ ; in the case of η the well behaved solution in (-1,1) (its range of definition), are the usual first class Chebyshev polynomials. However, since ξ is defined in (1...
Article
Full-text available
The unexpected high values for hydrogen storage capacity of single walled carbon nanotubes (SWNT) at room temperature has motivated a complete sensitivity analysis of potential energy of an H2 molecule as a function of its location inside the nanotube. Results of ab-initio calculations for SWNT's are presented and compared with bibliography. Specia...
Article
Full-text available
An index for the characterisation of the Perovskite type Superconductors is introduced. The index, denominated as Structural Parameter of High Tc Superconductivity (PESATc from its name in Spanish), is calculated using a Moebius Orbital defined as the length of an Octahedral Moebius Strip overlaying the octahedra created by the CuO planes and the a...
Article
Full-text available
A new parameter named PESATc (Parametro Estructural de los Superconductores de Alta Temperatura critica) is presented and used to discuss an aproach to the 'Stripe Phases' in (La,Ca)MnO3 superconductors. The PESATc parameter is based on the superposition of an Octahedrical Moebius Strip over the CuO planes and apical oxygen O(4). The linear correla...
Article
Full-text available
"Quise correr hacia los astrónomos, quería abrazarlos y agradecerles la invitación, pero me contuve. ¿Cómo podía yo interrumpir aquel rito que se sucedía frente a mí? Decidí esperar, esperar…"
Article
Full-text available
En noviembre pasado, el 17 para ser precisos, se cumplió un aniversario más del nacimiento de August Ferdinand Möbius: gran astrónomo teórico y matemático. Por ello, se antoja hacer un breve análisis y descripción de aquella entidad topológica descubierta por él y que, en su honor, lleva su nombre: La Cinta de Möbius. También, se presenta la oportu...
Conference Paper
Full-text available
Resumen Se presenta un posible origen del año de 260 días del Calendario Maya, encontrado con la ayuda de un método gnomónico desarrollado durante la interpretación de la Herradura de Trilitos de Stonehenge. Se describe el método que basado en la definición del f-factor, obtenido a partir de las sombras de un gnomon en fechas extremas (Solsticios d...

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Projects (3)
Project
To present relevant issues related to 500th anniversary of Leonardo da Vinci's dead.