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Textos sobre F´ısica en la biblioteca de un cient´ıfico novohispano del siglo XVIII 18世纪新西班牙裔科学家图书馆的物理学文本
Revista Mexicana De Fisica E Pub Date : 2021-07-02 DOI: 10.31349/revmexfise.18.020301
M. A. M. Corral
{"title":"Textos sobre F´ısica en la biblioteca de un cient´ıfico novohispano del siglo XVIII","authors":"M. A. M. Corral","doi":"10.31349/revmexfise.18.020301","DOIUrl":"https://doi.org/10.31349/revmexfise.18.020301","url":null,"abstract":"The titles of the Physics books owned by Antonio de Le´on y Gama are presented. In order to establish the degree of knowledge of this discipline that this New Spain native of the second half of the 18th century reached, the content of these works is discussed. It is shown that the knowledge reached in this matter by this person, were at the height of his European peers.","PeriodicalId":49600,"journal":{"name":"Revista Mexicana De Fisica E","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45734979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A note on producing supercooled water in a teaching laboratory 关于在教学实验室生产过冷水的笔记
Revista Mexicana De Fisica E Pub Date : 2021-07-02 DOI: 10.31349/revmexfise.18.020210
Isamar Zarco-Delgado, H. N. Núñez-Yépez, A. L. Salas-Brito
{"title":"A note on producing supercooled water in a teaching laboratory","authors":"Isamar Zarco-Delgado, H. N. Núñez-Yépez, A. L. Salas-Brito","doi":"10.31349/revmexfise.18.020210","DOIUrl":"https://doi.org/10.31349/revmexfise.18.020210","url":null,"abstract":"As we lower the temperature of water at a certain point it changes from liquid to solid. Yet under certain conditions it is possible to keep the water in a non-equilibrium, liquid-like phase, called emph{supercooled water}, thus avoiding solidification. Water in such state may freeze under the slightless perturbation, as stirring it a little. The existence of supercooled water is usually known to the students since the introductory courses, but it seems to be difficult to attest in an elementary undergraduate laboratory. A simple method for supercooling water is, however, readily available. It is this short paper aim to describe such a method in a form that may be readily performed in a teaching laboratory.","PeriodicalId":49600,"journal":{"name":"Revista Mexicana De Fisica E","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44898747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Curso de física para biólogos, cambio de perspectiva en su enseñanza 生物学家物理课程，教学视角的改变
Revista Mexicana De Fisica E Pub Date : 2021-07-01 DOI: 10.31349/revmexfise.18.020211
M. Segarra, C. Villarreal, D. N. Martínez
{"title":"Curso de física para biólogos, cambio de perspectiva en su enseñanza","authors":"M. Segarra, C. Villarreal, D. N. Martínez","doi":"10.31349/revmexfise.18.020211","DOIUrl":"https://doi.org/10.31349/revmexfise.18.020211","url":null,"abstract":"En este trabajo se presentan las bases didácticas que guiaron la organización y elaboración de materiales en un curso de física para biólogos, de acuerdo con el programa vigente de la Facultad de Ciencias, UNAM, para dicha asignatura. El curso se diseñó con base a los resultados en la investigación sobre la enseñanza de la física[1], lo que llevó a implementar en la dinámica cotidiana la modelización, contextualización, desarrollo de lo concreto a lo formal, trabajo activo de los alumnos tanto de forma individual como en grupos pequeños. Se presentan los resultados obtenidos, al aplicarlo a lo largo de 6 semestres (2016-I a 2019-I), con grupos tanto de primer ingreso como de repetidores. La población total consta de 128 estudiantes, constituida el 70% por mujeres.","PeriodicalId":49600,"journal":{"name":"Revista Mexicana De Fisica E","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47598451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
RECONSTRUYENDO LA DIFERENCIA DE CAMINO ÓPTICO DE UN INTERFEROGRAMA REAL DEGRADADO POR RUIDO MEDIANTE LA SOLUCIÓN DE DIFERENTES PROBLEMAS DE OPTIMIZACIÓN 通过解决不同的优化问题，重建真实噪声退化干涉图的光路差
Revista Mexicana De Fisica E Pub Date : 2021-05-26 DOI: 10.31349/REVMEXFISE.18.020207
J. Escobar, L. Santillán, J. C. Ramos, L. Santillán
{"title":"RECONSTRUYENDO LA DIFERENCIA DE CAMINO ÓPTICO DE UN INTERFEROGRAMA REAL DEGRADADO POR RUIDO MEDIANTE LA SOLUCIÓN DE DIFERENTES PROBLEMAS DE OPTIMIZACIÓN","authors":"J. Escobar, L. Santillán, J. C. Ramos, L. Santillán","doi":"10.31349/REVMEXFISE.18.020207","DOIUrl":"https://doi.org/10.31349/REVMEXFISE.18.020207","url":null,"abstract":"Este artículo presenta un estudio numérico comparativo que demuestra la factibilidad de la optimización estocástica (OE) para reconstruir la diferencia de camino óptico (DCO) a partir de un interferograma real degradado por ruido, ya sea por la maximización del coeficiente de correlación o por la minimización de la distancia euclidiana donde la optimización conseguida para cada función objetivo corresponde a la solución más cercana al óptimo global, sin ser dominada por un óptimo local. Con la finalidad de mostrar la eficacia de diferentes algoritmos de OE, inspirados en cómputo evolutivo, nosotros proponemos una solución al problema de maximización mediante el uso de un algoritmo genético no convencional de búsqueda multidireccional con las aberraciones primarias descritas por Kingslake, mientras que para la solución del problema de minimización se propone una estrategia evolutiva no convencional de búsqueda local con los polinomios de Zernike. Los resultados numéricos muestran la sencillez, robustez y precisión de ambos algoritmos de optimización para calcular sus correspondientes coeficientes de aberración. De esta forma, este trabajo ofrece una oportunidad idónea para integrar las habilidades adquiridas por los estudiantes universitarios de ciencias e ingeniería en materias como metrología óptica interferométrica, métodos numéricos y programación con el propósito de realizar análisis de interferogramas.","PeriodicalId":49600,"journal":{"name":"Revista Mexicana De Fisica E","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41462221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spherical accretion of a perfect fluid onto a black hole 完美流体在黑洞上的球形吸积
Revista Mexicana De Fisica E Pub Date : 2021-05-26 DOI: 10.31349/REVMEXFISE.18.020206
F. S. Guzmán Murillo, Iván Alvarez Ríos, Alejandro Romero Amezcua, José A. González
{"title":"Spherical accretion of a perfect fluid onto a black hole","authors":"F. S. Guzmán Murillo, Iván Alvarez Ríos, Alejandro Romero Amezcua, José A. González","doi":"10.31349/REVMEXFISE.18.020206","DOIUrl":"https://doi.org/10.31349/REVMEXFISE.18.020206","url":null,"abstract":"In this academic paper we present in detail the numerical solution of the accretion of a perfect fluid onto a black hole. The conditions are very simple, we consider a radial flux being accreted by a Schwarzschild black hole. We present two scenarios: 1) the test field case in which the fluid does not affect the geometry of the black hole space-time background, and 2) the full non-linear scenario, in which the geometry of the space-time evolves simultaneously with the fluid according to Einstein's equations.In the two scenarios we describe the black hole space-time in horizon penetrating coordinates, so that it is possible to visualize that accretion actually takes place within the numerical domain.For the evolution of matter we use the Valencia formulation of relativistic fluid dynamics. In the non-linear scenario we solve the equations of geometry using the ADM formulation of General Relativity, with very simple and intuitive gauge and boundary conditions, and include diagnostics related to the Apparent Horizon and Event Horizon growth.In view of the recent spectacular discoveries by the Event Horizon Telescope collaboration and further discoveries to come, the aim of this paper is to provide the necessary tools for interested graduate students in Black Hole Astrophysics, to enter into the accretion modeling starting from a considerable advanced starting point.","PeriodicalId":49600,"journal":{"name":"Revista Mexicana De Fisica E","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46017345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the calculus of Dirac delta function with some applications in classical electrodynamics 狄拉克函数的演算及其在经典电动力学中的应用
Revista Mexicana De Fisica E Pub Date : 2021-05-21 DOI: 10.31349/REVMEXFISE.18.020205
M. Kovačević, M. R. Jovanovic, M. Milošević
{"title":"On the calculus of Dirac delta function with some applications in classical electrodynamics","authors":"M. Kovačević, M. R. Jovanovic, M. Milošević","doi":"10.31349/REVMEXFISE.18.020205","DOIUrl":"https://doi.org/10.31349/REVMEXFISE.18.020205","url":null,"abstract":"The Dirac delta function is a concept that is useful throughout physics as a standard mathematical tool that appears repeatedly in the undergraduate physics curriculum including electrodynamics, optics, and quantum mechanics. Our analysis was guided by an analytical framework focusing on how students activate, construct, execute, and reflect on the Dirac delta function in the context of classical electrodynamics problems solving. It’s applications in solving the charge density associated with a point charge as well as electrostatic point dipole field, for more advanced situations to describe the charge density of hydrogen atom were presented.","PeriodicalId":49600,"journal":{"name":"Revista Mexicana De Fisica E","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44968608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On random walks, projecting election results and statistical physics 随机漫步，预测选举结果和统计物理
Revista Mexicana De Fisica E Pub Date : 2021-05-13 DOI: 10.31349/REVMEXFISE.18.020202
J. V. Escobar
{"title":"On random walks, projecting election results and statistical physics","authors":"J. V. Escobar","doi":"10.31349/REVMEXFISE.18.020202","DOIUrl":"https://doi.org/10.31349/REVMEXFISE.18.020202","url":null,"abstract":"Several important statistical tools and concepts are covered in upper division undergraduate Statistical Physics courses, including those of random walks and the central limit theorem. However, some of their broad applicability tends to be missed by students as well as the connection between these and other physical concepts. In this work, we apply a 1D random walk to study the evolution of the probability that a candidate will win an election given she holds some lead over her opponent, and connect the result found to the concept of density of states and occupation probabilities. This paper is intended to serve as a guide to the Statistical Physics instructor who wishes to motivate students beyond the boundaries of the official syllabus.","PeriodicalId":49600,"journal":{"name":"Revista Mexicana De Fisica E","volume":"83 1","pages":"020202"},"PeriodicalIF":0.0,"publicationDate":"2021-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86865276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estudio teórico-experimental de la dinámica del movimiento circular con fricción 摩擦圆周运动动力学的理论实验研究
Revista Mexicana De Fisica E Pub Date : 2021-05-13 DOI: 10.31349/REVMEXFISE.18.020204
R. Cortés-Maldonado, M. C. M. C. Gómez-Conde, C. Bueno-Avendaño, J. F. Casco-Vásquez
{"title":"Estudio teórico-experimental de la dinámica del movimiento circular con fricción","authors":"R. Cortés-Maldonado, M. C. M. C. Gómez-Conde, C. Bueno-Avendaño, J. F. Casco-Vásquez","doi":"10.31349/REVMEXFISE.18.020204","DOIUrl":"https://doi.org/10.31349/REVMEXFISE.18.020204","url":null,"abstract":"En este trabajo se presenta un estudio teorico-experimental de la dinamica del movimiento de una esfera que se mueve en una trayectoria circular vertical con friccion. En el estudio teorico se resuelve una ecuacion diferencial de Bernoulli que permite calcular la rapidez en cualquier posicion angular y la rapidez minima necesaria para que la esfera complete una vuelta en la trayectoria circular. En el estudio experimental se utilizan fotopuertas para medir la posicion angular de la esfera como funcion del tiempo, a partir de esto, se obtiene de manera indirecta la rapidez y fuerza normal en cualquier posicion angular. Al comparar los resultados teoricos y experimentales, obtenidos de forma indirecta para la rapidez y fuerza normal, se observa un buen acuerdo entre ambos cuando µ=0.12. Finalmente, se analiza el comportamiento teorico de la rapidez y fuerza normal para distintos valores del coeficiente de friccion cinetica, en donde se observa que para µ≥0.2 la rapidez y fuerza normal final decaen de manera abrupta.","PeriodicalId":49600,"journal":{"name":"Revista Mexicana De Fisica E","volume":"496 1","pages":"020204"},"PeriodicalIF":0.0,"publicationDate":"2021-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78838407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The use of fictitious time in Lagrangian mechanics 拉格朗日力学中虚拟时间的应用
Revista Mexicana De Fisica E Pub Date : 2021-05-13 DOI: 10.31349/REVMEXFISE.18.020201
G. F. Torres del Castillo
{"title":"The use of fictitious time in Lagrangian mechanics","authors":"G. F. Torres del Castillo","doi":"10.31349/REVMEXFISE.18.020201","DOIUrl":"https://doi.org/10.31349/REVMEXFISE.18.020201","url":null,"abstract":"We present some examples in the elementary Lagrangian formulation of classical mechanics where the introduction of a parameter in place of the time (sometimes called fictitious time or local time) decouples the equations of motion.","PeriodicalId":49600,"journal":{"name":"Revista Mexicana De Fisica E","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43370071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
From Ramanujan to renormalization: the art of doing away with divergences and arriving at physical results 从拉马努金到重整化:消除散度并达到物理结果的艺术
Revista Mexicana De Fisica E Pub Date : 2021-02-09 DOI: 10.31349/RevMexFisE.18.020203
W. Bietenholz
{"title":"From Ramanujan to renormalization: the art of doing away with divergences and arriving at physical results","authors":"W. Bietenholz","doi":"10.31349/RevMexFisE.18.020203","DOIUrl":"https://doi.org/10.31349/RevMexFisE.18.020203","url":null,"abstract":"A century ago Srinivasa Ramanujan --- the great self-taught Indian genius of mathematics --- died, shortly after returning from Cambridge, UK, where he had collaborated with Godfrey Hardy. Ramanujan contributed numerous outstanding results to different branches of mathematics, like analysis and number theory, with a focus on special functions and series. Here we refer to apparently weird values which he assigned to two simple divergent series, $sum_{n geq 1} n$ and $sum_{n geq 1} n^{3}$. These values are sensible, however, as analytic continuations, which correspond to Riemann's $zeta$-function. Moreover, they have applications in physics: we discuss the vacuum energy of the photon field, from which one can derive the Casimir force, which has been experimentally measured.  We discuss its interpretation, which remains controversial. This is a simple way to illustrate the concept of renormalization, which is vital in quantum field theory.","PeriodicalId":49600,"journal":{"name":"Revista Mexicana De Fisica E","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43133940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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