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Search Results: 1 - 10 of 325501 matches for " Jesús Sánchez "
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Calculation of the Gravitational Constant G Using Electromagnetic Parameters  [PDF]
Jesús Sánchez
Journal of High Energy Physics, Gravitation and Cosmology (JHEPGC) , 2017, DOI: 10.4236/jhepgc.2017.31012
Abstract: In this paper, we will derive the following formula for the value of the gravitational constant G: \"\" (1). This equation has only 0.81% error compared to the common accepted value \"\" [1]. The parameters in the equation are the following: \"\" the fine structure constant, q the elementary charge, \"\" the mass of the electron, \"\" the permittivity of the free space, e the exponential function and \"\" the relation between a circumference and its diameter. Values attached: \"\" [2], \"\"</span
Calculation of the Fine-Structure Constant  [PDF]
Jesús Sánchez
Journal of High Energy Physics, Gravitation and Cosmology (JHEPGC) , 2018, DOI: 10.4236/jhepgc.2018.43029
Abstract: The fine-structure constant α [1] is a constant in physics that plays a fundamental role in the electromagnetic interaction. It is a dimensionless constant, defined as: \"\" (1) being q the elementary charge, ε0 the vacuum permittivity, h the Planck constant and c the speed of light in vacuum. The value shown in (1) is according CODATA 2014 [2]. In this paper, it will be explained that the fine-structure constant is one of the roots of the following equation: \"\" (2) being e the mathematical constant e (the base of the natural logarithm). One of the solutions of this equation is: \"\" (3) This means that it is equal to the CODATA value in nine decimal digits (or the seven most significant ones if you prefer). And therefore, the difference between both values is: \"\" (4) This coincidence is higher in orders of magnitude than the commonly accepted necessary to validate a theory towards experimentation. As the cosine function is periodical, the Equation (2) has infinite roots and could seem the coincidence is just by chance. But as it will be shown in the paper, the separation among the different solutions is sufficiently high to disregard this possibility. It will also be shown that another elegant way to show Equation (2) is the following (being i the imaginary unit): \"\" (5) having of course the same root (3). The possible meaning of this other representation (5) will be explained.
How to Check If a Number Is Prime Using a Finite Definite Integral  [PDF]
Jesús Sánchez
Journal of Applied Mathematics and Physics (JAMP) , 2019, DOI: 10.4236/jamp.2019.72028
Abstract: In the history of mathematics different methods have been used to detect if a number is prime or not. In this paper a new one will be shown. It will be demonstrated that if the following equation is zero for a certain number p, this number p would be prime. And being m an integer number higher than (the lowest, the most efficient the operation). \"\" . If the result is an integer, this result will tell us how many permutations of two divisors, the input number has. As you can check, no recurrent division by odd or prime numbers is done, to check if the number is prime or has divisors. To get to this point, we will do the following. First, we will create a domain with all the composite numbers. This is easy, as you can just multiply one by one all the integers (greater or equal than 2) in that domain. So, you will get all the composite numbers (not getting any prime) in that domain. Then, we will use the Fourier transform to change from this original domain (called discrete time domain in this regards) to the frequency domain. There, we can check, using Parseval’s theorem, if a certain number is there or not. The use of Parseval’s theorem leads to the above integral. If the number p that we want to check is not in the domain, the result of the integral is zero and the number is a prime. If instead, the result is an integer, this integer will tell us how many permutations of two divisors the number p has. And, in consequence information how many factors, the number p has. So, for any number p lower than 2m?- 1, you can check if it is prime or not, just making the numerical definite integration. We will apply this integral in a computer program to check the efficiency of the operation. We will check, if no further developments are done, the numerical integration is inefficient computing-wise compared with brute-force checking. To be added, is the question regarding the level of accuracy needed (number of decimals and number of steps in the numerical integration) to have a reliable result for large numbers. This will be commented on the paper, but a separate study will be needed to have detailed conclusions. Of course,
La reestructuración de la minería leonesa
Sánchez Melado, Jesús
Pecunia : Revista de la Facultad de Ciencias Económicas y Empresariales , 2007,
Abstract: Este artículo analiza los cambios más importantes que han tenido lugar en la minería leonesa a lo largo del proceso de reordenación iniciado en 1990. Entre ellos cabe destacar la reducción de la capacidad de producción, la contracción de las plantillas, la mejora de los rendimientos, la contención de costes y la profunda transformación de su estructura empresarial. Pese a ello, el gran problema de la industria carbonera leonesa sigue siendo el de su inviabilidad. La incertidumbre derivada de este problema se ha visto además acrecentada con la entrada en vigor de las nuevas normas tendentes a moderar las emisiones contaminantes a la atmósfera.This article analyzes the most important changes that they have taken place in the mining in Leon throughout the process of rearrangement initiated in 1990. Among them it is possible to emphasize the reduction of the production capacity, the contraction of the employment, the improvement of the yields, the containment of costs and the deep transformation of its enterprise structure. In spite of it, the great problem of the coal industry in Leon continues being its inviabilidad. The uncertainty that this problem causes has been increased with the take effect of the new norms to diminish the polluting emissions to the atmosphere.
Teaching Geography for a Sustainable World: A Case Study of a Secondary School in Spain
Jesús GRANADOS SáNCHEZ
Review of International Geographical Education Online , 2011,
Abstract: Geography has a major responsibility in delivering education for sustainable development (ESD), especially because the geographical concepts of place and space are key dimensions for the analysis and pursuit of sustainability. This paper presents the results of a research that investigated how the teaching of geography in secondary education in Catalonia (Spain) contributes to ESD. For the development of this research it was explored what is involved in understanding and resolving issues about sustainable development and how geography teachers might best conceptualize and teach in this new domain. As a result of this theoretical reflection it has been defined a proposal or model for reorienting the geography curriculum from the basis of the ESD paradigm, which is based and structured in four groups of criteria and recommendations as follows: recommendations for defining competences and learning objectives; criteria for selecting geographical contents and themes; criteria for selecting geographical areas and for the use of scale; and finally, recommendations for choosing the most suitable teaching and learning approach.
La sociología y la naturaleza social de la ciencia
Sánchez Navarro, Jesús
Isegoría , 1995,
Abstract:
Solving the Flowgraphs Case with Eclectic
Jesús Sánchez Cuadrado
Computer Science , 2013, DOI: 10.4204/EPTCS.135.6
Abstract: This paper presents a solution for the Flow Graphs case of the Transformation Tool Contest 2013, using the Eclectic model transformation tool. The solution makes use of several languages of Eclectic, showing how it is possible to combine them to address a non-trivial transformation problem in a concise and modulary way.
Límites del multiculturalismo de Kymlicka para la defensa de los derechos de los pueblos indígenas
Serrano Sánchez, Jesús Antonio;
En-claves del pensamiento , 2008,
Abstract: the goal of this text is to highlight, in a summarized form, a few of the criticisms that follow the main proposals of will kymlicka's multiculturalism. we shall demonstrate that this kind of multiculturalism is inappropriate to promote and to defend minority indigenous rights in latin america.
La política oficial de combate a la corrupción en México: una revisión
Serrano Sánchez, Jesús Antonio;
Andamios , 2009,
Abstract: this paper discusses some ideas of what the ethics of public servants should be, and contrasts the objectives and strategies outlined in the national program to combat corruption by the federal government (mexico, 2000-2006) with the objectives achieved at the end the administration and the place of mexico in perceptions of corruption. the paper suggests that ethical development of public servants should be understood as a political issue, where the individual's interest ought to be tuned to the institution he works for. the optimal functioning of the institution should thus be seen as a personal benefit.
Aplicación del proceso de atención de enfermería a la salud laboral
González Sánchez,Jesús;
Medicina y Seguridad del Trabajo , 2011, DOI: 10.4321/S0465-546X2011000100003
Abstract: occupational health is an area in which nursing care process has an important role, as we are in a professional environment in charge of the provision of patient care, in this case workers. its implementation will involve the use of a scientific method by the labor nurse in her daily practice, involving these five areas: prevention, care, teaching and research, administrative and management. the main objective of the implementation of this tool will be to provide a structure that can cover individualized needs of workers who demand the attention of the prevention area, improving efficiency and effectiveness of work and an easier and higher rate of the healing process. this application is certainly new, as we apply a traditional pattern of nursing in a new area of occupational health.
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