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Search Results: 1 - 10 of 203761 matches for " Marcelo D'Agostino "
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Maxwell’s Dynamical Philosophy: An Early Solution to the Problem of a Discrepancy between Particles and Waves  [PDF]
Salvo DAgostino
Advances in Historical Studies (AHS) , 2014, DOI: 10.4236/ahs.2014.33012
Abstract: J. C. Maxwell contributed to an important philosophy of science, the so-called Dynamical Philosophy and Dynamical Approach to his theories. He meant it by a Dynamical Approach a theory of motions of the moving particle that could dispense with the detailed mechanism of motion. In order to develop this type of approach, he applied a modified form of Lagrange's equations in his 1865 essay “A Dynamical Theory of the Electromagnetic Field” and in his master opus “A Treatise on Electricity and Magnetism”. But an attentive historical research has also realized that he used an analogous approach in his contribution to a kinetic theory of gases, the well known statistical law of velocities.
A Good Chance for the Cat’s Life: Erwin Schroedinger’s New Statistics and a Second Quantization Theory of Quantum  [PDF]
Salvo DAgostino
Advances in Historical Studies (AHS) , 2015, DOI: 10.4236/ahs.2015.41001
Abstract: In his paper on the Cat’s uncertain situation between life and death, S. intended to criticize the Copenhagen interpretation of Quantum Mechanics and, conversely, to assert the consistency of his own wavelike view of the theory. His ideas contrasted with Heisenberg and Bohr’s positions, but also with Einstein’s attempt at a classically statistical interpretation of a quantum theory. His criticism therefore did not intend to discredit the whole Quantum Mechanics. In the fifties, he proposed a second quantization approach to a many particles state of the theory, which included his New Statistics. He asserted that the new approach modified some aspects of his famous 1926 equations. In my paper, I argue that S.’s new ideas in the fifties are related to his 1920 and 1926 contributions on rarified gas theory.
An Overview of the Nineteenth and Twentieth Centuries’ Theories of Light, Ether, and Electromagnetic Waves  [PDF]
Salvo DAgostino
Advances in Historical Studies (AHS) , 2016, DOI: 10.4236/ahs.2016.51001
Abstract: Johannes Kepler, the seventeenth century celebrated astronomer, considered vision as the effect of its alleged cause—the Lumen. Since many centuries, scientists and philosophers of Light were especially interested in theories and experiments on the cause-effect relationship between our vision and its alleged cause. But the Nineteenth and Twentieth Centuries’ contributions of Helmholtz, Maxwell, Hertz, and Lorentz, proved that Light was an electromagnetic wavelike phenomenon, which propagated trough space or ether by an exceptionally high velocity. In my paper I analyze some of the reasons that might justify the controversies among the major experts in Physics and Electrodynamics. In 1905 Albert Einstein found that abolishing Ether would remarkably improve his new Special Relativity theory, and Maxwell’s and Hertz’s Electrodynamics. His theory was accepted by a large majority of physicists, Max Planck included, but he also found a ten-year silence on the side of Poincaré, and moderate oppositions from Lorentz, the great expert in classical Electrodynamics.
Equivalence Principle and Ether: Two Revolutionary Kernels of Einstein’s General Relativity  [PDF]
Salvo Dagostino
Advances in Historical Studies (AHS) , 2016, DOI: 10.4236/ahs.2016.55019
Abstract: Einstein’s discovery of the Equivalence Principle is to be considered as the most fundamental concept at the origin of his General Relativity. I highlight that the ether problem is related with Enstein’s conception of gravitational waves as a perturbation of the space-time curvature, formalized as a specific space-time process, and not as the effect of a whatever supporting medium. Quite differently, the nineteenth century field theory of gravitation supported by physicists such as Maxwell, Heaviside, and Hertz, was based on a search for substantial ether, and on a parallelism with Maxwell’s theory of electromagnetic waves. The negative results of their theories proved that parallelism was a wrong approach. Einstein’s genius superseded their approach by considering that it was not a matter of the ether’s constitution, but of a fundamental change in the role and nature of physics. In my paper I refer to Einstein’s different approaches to ether since his 1905 Special Relativity up to his 1950’ views. I argue that his different attempts were symptoms of the difficulty of his revolutionary innovation.
Medicina y Seguridad del Trabajo, evaluación desde su ingreso en la Red SciELO (Scientific Electronic Library Online)
Bernal Zamora,Ascensión; Maqueda Blasco,Jerónimo; Veiga de Cabo,Jorge; D'Agostino,Marcelo;
Medicina y Seguridad del Trabajo , 2012, DOI: 10.4321/S0465-546X2012000100001
Abstract: this editorial is a review of key content and editorial changes suffered by the medicina y seguridad del trabajo for the past 5 years, coinciding with the period since joining scielo (scientific electronic library online) (2007-2011). in the study period there have been more of 190,000 articles access, an impact factor (if) scielo of 1.22, increase the number of articles received from different countries of america and europe and the journal has been indexed in various international bibliographic databases (scielo, directory of open access journals (doaj), google schoolar, eprints in library and information science (e-lis) and latindex) and national (ibecs, emi, base data national research council (csic), and cuiden dialnet). editorial quality and contents have also been enhanced with various modifications and changes, and the pan american health organization, regional office for the americas of the world health organization (paho/who) is involved in the journal edition. there was an increase of over 40% of articles published in the last five years compared to previous period, from 118 to 202 items. the number of editorials and clinical cases are also increasing at a rate of 40%. original articles are increased by just over 50% (53 versus 109), finding the largest increase in review articles (3 in the first period and 25 in the last five-years study period). finally, in 2011, medicina y seguridad del trabajo has first published a special number about psychosocial factors, and mental health occupational health including 15 review articles on current topics by specialists in the field. this results, encourage editorial team eagerness to continue working to improve quality and visibility of the journal over the coming years.
La iniciativa Open Access, una visión de conjunto
Sanz-Valero,Javier; D'Agostino,Marcelo José; Castiel,Luis David; Veiga de Cabo,Jorge;
Medicina y Seguridad del Trabajo , 2007, DOI: 10.4321/S0465-546X2007000200003
Abstract: from ancient times to the millenium development goals declaration, the issue of access to information has been essential to the world economic and social development and should be tackled as a right inherent to human beings. the open access movement contributes to giving the scientific community the hegemony they deserve by facilitating the use of relevant scientific literature and giving the authors and their work a new measurable visibility, eliminating barriers and reducing inequities in the access to technical-scientific information via the internet.
Alfabetización Digital: un pelda?o hacia la sociedad de la información
Martí,Myrna Carolina; DAgostino,Marcelo José; Veiga de Cabo,Jorge; Sanz-Valero,Javier;
Medicina y Seguridad del Trabajo , 2008, DOI: 10.4321/S0465-546X2008000100003
Abstract: human beings tend to react to the words by their antonymous. the first thing that comes to the mind when speaking of literacy is in the illiterate. unfortunately, this word has a very strong antonymous and with highly negative social and cultural implications. this is one of the great criticisms to the tendency to call "literacy" to this ongoing renewal of the capacities of learning and communicating. in this article we agree with those thinkers who state that the word "literacy", meaning the ability to read and write, has gradually extended its scope of application in the digital era to move to mean the ability to use the information and communications technologies and to understand the information, whatever its format. we present literacy as a constant and permanent learning process which should continue during life so that people can be functional for their family life, for the society and for the organizations in which they work, in this new paradigm called "information society". digital literacy is the last step known in this escalation towards the information society. we are in the middle of a permanent process of transformation which compels us to rethink our relationship with reality and we must be prepared to act accordingly since time and availability and the access to information have become key elements of survival in this new society.
Los filtros metodológicos: aplicación a la búsqueda bibliográfica en la medicina del trabajo espa ola
Javier Sanz-Valero,Jorge Veiga de Cabo,Carlos Rojo-Alonso,Marcelo José DAgostino
Medicina y Seguridad del Trabajo , 2008,
Abstract: Fundamento: Conocer la producción científica espa ola sobre Medicina del Trabajo mediante la utilización de un filtro metodológico de búsqueda (ecuación de búsqueda). Metodología: Se propone un filtro metodológico de búsqueda construido por unión booleana de un filtro temático, utilizando Descriptores sobre Medicina del Trabajo en forma de Major Topic y un filtro geográfico previamente probado en anteriores estudios (filtro temático AND filtro geográfico). Se estudiaron variables bibliométricas para conocer la idoneidad de los trabajos recuperados. Resultados: Se construyó un filtro que permite observar su aptitud en relación a la materia del estudio, Medicina del Trabajo, donde se recuperó un 90,87% de trabajos pertinentes. En cuanto a la filiación institucional se comprobó la procedencia espa ola en el 96,58% referencias recuperadas. Conclusión: Se propone un filtro eficaz para la búsqueda en MEDLINE de trabajos sobre Medicina del Trabajo, pudiéndose usar de forma sistemática e incluso utilizar junto a otras ecuaciones para especificar la búsqueda a temas más concretos. Los resultados bibliométricos obtenidos son similares a la de otros estudios del área de las ciencias de la salud. Fundaments: To know the Spanish scientific production on Labour Medicine by means of the use of a methodologic filter search (searching equation). Methodology: A searching methodologic filter made up by the boolean union of a thematic filter was proposed. Labour Medicine descriptors used as Major Topic and a geographic filter previously checked in other studies (thematic filter AND geographic filter). Bibliometric variables were studied to know the suitability of the recovered works. Results: A filter that allows observation of the aptitude in relation to the matter of study was constructed. Using Labour Medicine, 90.87% pertinent works were found. In respect to the institutional filiations, Spanish precedence was found in 96.58% of the recovered references. Conclusion: The purpose is to use an effective filter for the MEDLINE search of studies that focus in Labour Medicine produced by Spanish institutions, being able to use them in a systematic way and even use them with other equations and focus the search in more concrete themes. The bibliometric results obtained are similar to other studies in the area of health sciences.
Medicina y Seguridad del Trabajo, evaluación desde su ingreso en la Red SciELO (Scientific Electronic Library Online) Medicina y Seguridad del Trabajo, evaluation since joining SciELO (Scientific Electronic Library Online)
Ascensión Bernal Zamora,Jerónimo Maqueda Blasco,Jorge Veiga de Cabo,Marcelo D'Agostino
Medicina y Seguridad del Trabajo , 2012,
Abstract: Se realiza una revisión de los principales cambios editoriales y de contenido sufridos por la revista de Medicina y Seguridad del Trabajo durante los últimos 5 a os, coincidiendo con el periodo desde que ingresó en SciELO (ScientificElectronic Library Online) (2007-2011). En el periodo estudiado se han realizado un número de consultas a sus artículos superior a los 190 mil, ha tenido un Factor de Impacto (FI) SciELO del 1.22, se ha incrementado el número de artículos recibidos de diferentes países de América y Europa y se la revista ha sido indizada en diferentes Bases de Datos bibliográficas internacionales (SciELO, Directory of Open Access Journals (DOAJ), Google Schoolar, Eprints in Library and InformationScience (E-LIS) y LATINDEX) y nacionales (IBECS, IME, Base de Datos del Consejo Superior de Investigaciones Científicas (CSIC), DIALNET y CUIDEN). La calidad editorial y de contenidos también se han visto mejoradas con diferentes modificaciones y cambios introducidos. Se cuenta con la participación editorial de la Organización Panamericana de la Salud, Oficina regional para las Américas de la Organización M undial del Salud (OPS/OMS), se ha producido un incremento superior al 40% de los artículos publicados en el último quinquenio respecto al periodo anterior, pasando de 118 a 202 artículos. El número de Editoriales y casos Clínicos también se incrementan en un porcentaje del 40 %. Los Artículos Originales se incrementan en algo más del 50% (53 versus 109), encontrando el mayor incremento en los Artículos de revisión que pasan de 3 en el primer anterior a 25 en el periodo de estudio. Por último, en 2011, Medicina y Seguridad en el Trabajo ha publicado por primera vez un número monográfico especial sobre Factores Psicosociales, Salud laboral y Salud Mental que incluye 15 artículos de revisión sobre temas de actualidad realizados por especialistas en la materia. Los resultados estimulan el afán por del Equipo Editorial por seguir trabajando para mejorar de calidad y visibilidad de la revista durante los próximos a os. This Editorial is a review of key content and editorial changes suffered by the Medicina y Seguridad del Trabajo for the past 5 years, coinciding with the period since joining SciELO (Scientific Electronic Library Online) (2007-2011). In the study period there have been more of 190,000 articles access, an impact factor (IF) SciELO of 1.22, increase the number of articles received from different countries of America and Europe and the journal has been indexed in various international bibliographic databases (SciELO, Directory of Open Acces
Alfabetización Digital: un pelda o hacia la sociedad de la información
Myrna Carolina Martí,Marcelo José DAgostino,Jorge Veiga de Cabo,Javier Sanz-Valero
Medicina y Seguridad del Trabajo , 2008,
Abstract: Los seres humanos tienden a reaccionar ante las palabras por sus antónimos. Lo primero que se piensa cuando se habla de alfabetización es en los analfabetos. Lamentablemente esta palabra tiene un antónimo muy fuerte y con implicancias sociales y culturales muy negativas. Esta es una de las grandes críticas a la tendencia de llamar "alfabetización" a esta renovación continua de las capacidades de aprender y comunicarse. En este articulo coincidimos con los pensadores que sostienen que la palabra "alfabetización, significando la capacidad para leer y escribir, ha extendido gradualmente su campo de aplicación en la era digital para pasar a significar la capacidad para utilizar las tecnologías de información y comunicaciones y entender la información, cualquiera que sea su formato. Presentamos a la alfabetización como un proceso constante y permanente de aprendizaje que debe perdurar por toda la vida de las personas para que las mismas sean funcionales en su vida en familia, en sociedad y en las organizaciones en las que trabajan en este nuevo paradigma llamado "Sociedad de la Información". La Alfabetización Digital es el último pelda o conocido de esta escalada hacia la Sociedad de la Información. Estamos en el medio de un proceso de transformación permanente que nos impone repensar nuestras relaciones con la realidad y debemos estar preparados para actuar en consecuencia ya que el tiempo y la disponibilidad y el acceso a información se han transformado en elementos claves de supervivencia en esta nueva Sociedad. Human beings tend to react to the words by their antonymous. The first thing that comes to the mind when speaking of literacy is in the illiterate. Unfortunately, this word has a very strong antonymous and with highly negative social and cultural implications. This is one of the great criticisms to the tendency to call "literacy" to this ongoing renewal of the capacities of learning and communicating. In this article we agree with those thinkers who state that the word "literacy", meaning the ability to read and write, has gradually extended its scope of application in the digital era to move to mean the ability to use the information and communications technologies and to understand the information, whatever its format. We present literacy as a constant and permanent learning process which should continue during life so that people can be functional for their family life, for the society and for the organizations in which they work, in this new paradigm called "Information Society". Digital Literacy is the last step known in this escalation towar
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