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Coupled Thermodynamic Behavior of New Screw Compressors Rotors Profile Comportamiento termodinámico de rotores para compresores de tornillo con nuevo perfil
Arístides Rivera Torres,José Martínez Escanaverino
Revista Cubana de Ingeniería , 2010, DOI: 10.1234/rci.v1i2.19
Abstract: The article displays an evaluation of the thermodynamic behavior of screw compressor rotors with new profiles, obtained with the help of the Scorpath 2000 software. This allows predicting precisely the operation of the compressor, as well as its thermodynamic evaluation, under equal conditions, with the work of other compressors fitted with rotor profiles of other kinds. En el artículo se evalúa el comportamiento termodinámico de rotores para compresores de tornillo con nuevos perfiles, realizado con ayuda del software Scorpath 2000. Ello permite predecir con precisión el desempe o completo del compresor y su evaluación termodinámica, así como realizar comparaciones, en igualdad de condiciones, con el trabajo de otros compresores dotados de perfiles de otros tipos.
Comportamiento termodinámico de rotores para compresores de tornillo con nuevo perfil.
A. Rivera Torres,J. Martínez Escanaverino
Revista de Ingeniería Mecánica , 2007,
Abstract: En el presente artículo se evalúa el comportamiento termodinámico de rotores para compresores de tornillo con nuevos perfiles, realizado con ayuda del software Scorpath 2000. Ello permite predecir con precisión el desempe o completo del compresor y su evaluación termodinámica, así como realizar comparaciones, en igualdad de condiciones, con el trabajo de otros compresores dotados de perfiles de otros tipos.The article displays an evaluation of the thermodynamic behaviour of screw compressor rotors with new profiles, obtained with the help of the Scorpath 2000 software. This allows predicting precisely the operation of the compressor, as well as its thermodynamic evaluation, under equal conditions, with the work of other compressors fitted with rotor profiles of other kinds.
Dise o paramétrico de pinzas de fricción
S. A. Marrero Osorio,J. Martínez Escanaverino
Revista de Ingeniería Mecánica , 2009,
Abstract: En el trabajo se expone una forma de realizar el dise o depurado de máquinas mediante el empleo de la tecnología paramétrica. Para resolver el problema de dise o se utiliza un modelo de ingeniería que abarca geometría, materiales, cargas, resistencia, tecnología y aspectos económicos entre otros. Con el mismo fin se hace uso del método de los grafos dicromáticos, que facilita considerablemente el manejo del modelo matemático, el planteamiento del problema de dise o, su caracterización y su resolución. Todo se ejemplifica a través de una máquina relativamente sencilla: una pinza de fricción utilizable en la manipulación de losas prefabricadas.In this paper a way of making a detailed design of machines by the use of Parametric Technology is exposed. To solve the design task, an engineering model that covers geometry, materials, loads, stresses, manufacture, economy and other aspects is used. With the same objective the Dichromatic Graphs Method is used, which considerably facilitates the mathematical model's handling, the definition of the design problem, and its characterization and solution. An example of design in a relative easy machine illustrates the process: a friction gripper used in the manipulation of light prefabricated elements.
Estrategia para el dise o paramétrico basado en modelos.
S. A. Marrero Osorio,J. Martínez Escanaverino.
Revista de Ingeniería Mecánica , 2008,
Abstract: El presente artículo expone una manera de dise ar paramétricamente utilizando los programas de computadora (CAD, CAE, PMS) difundidos entre los dise adores durante los últimos 20 a os. La propuesta se basa en modelos matemáticos que consideran el conocimiento sobre la ingeniería del objeto de dise o y lo relacionado con la confección de su modelo virtual tridimensional, planos y otro aspectos; utilizando el Método de los Grafos Dicromáticos para resolver los problemas computacionales que se presentan en el dise o paramétrico. Se analizan los puntos de vista de diferentes autores en relación con el proceso general de dise o y es ubicado dentro del mismo el dise o paramétrico, realizándose una explicación formal que permite arribar a conclusiones interesantes.The present article exposes a way to design parametrically applying programs (CAD, CAE, PMS) accepted by designers along the last 20 years. The proposal is based on mathematical models that ponder the knowledge on the engineering of the design object and the building of its three-dimensional virtual models, blueprints and another aspects; using the dichromatic graph method to solve computational problems in parametric design. The points of view of different authors are analyzed in connection with the general process of design, locating parametric design inside it, carrying out a formal explanation which arrives to interesting conclusions.
"Somos resto de gentiles'': El manejo del tiempo y la construcción de diferencias entre comunidades andinas
Martínez,José Luis;
Estudios atacame?os , 2010, DOI: 10.4067/S0718-10432010000100005
Abstract: the communities of toconce, caspana, and ayquina in the salado river valley (ii región, chile) share the same area, a similar set of production practices and sociopolitical structures. however, differ in the stories about their origins and their position between being "restos de gentiles"-that is, prehispanic-or more recent "modernities". here, i propose that these narratives, which do not correspond to archaeological evidence, are the result of a symbolic use of time, as a signifier of different local identities.
La nueva gerencia pública en México: Una medición de su intensidad e impactos en las entidades del país
Martínez Vilchis, José;
Convergencia , 2009,
Abstract: this article represents a further investigation in regards to public administration in the states from mexico. through an exhaustive documental review and interviews with officials responsible for the modernization and control offices of the government, it identifies both the normative and organizational elements, as well as the planning related to the new public management (npm). the objective of this article is to propose an index to rank the intensity with which the local administrations have assimilated the npm. this document contrast the index proposed to the human development rates in order to associate the effects of the administrative improvements and innovations on the quality of life in mexican communities.
Redescripción de Colpotrochia flava (Hymenoptera: Ichneumonidae: Metopiinae)
Martínez,Juan José;
Revista de la Sociedad Entomol?3gica Argentina , 2008,
Abstract: colpotrochia flava (brèthes) is redescribed and illustrated based on the study of one syntype from paraguay previously presumed lost. new distributional records from argentina are provided and lectotype is designated for sychnoleteroides flavus brèthes.
Ciguatera, presentación de un caso
Martínez Ricardo,José;
Revista Habanera de Ciencias M??dicas , 2010,
Abstract: a case of 34 years old male patient is presented that went to the department of the gibara hospital, holguin county intoxicated specifically by the consumption of fresh fish known as sierra (perticnis pertinata), the process corresponded with the diagnosis of ciguatera. during colonization a farmowner described his disease after eating a coast fish as "sea water poisoning", and one of his apprentice man(also sick) named the disease ( ciguatera)" as a creole name for it, never known or recognized in cuba for the creation of this article, available bibliography sources were revised in our libraries, as well as the databases in infomed, as a results: outstanding atypical clinical manifestations of the illness and other are described with the revised bibliography, as well as its genesis and evolution.
Suau Jiménez, Francisca (2010). La traducción especializada (en inglés y espa ol en géneros de economía y empresa)
José Mateo Martínez
International Journal of English Studies (IJES) , 2011, DOI: 10.6018/ijes.11.1.137061
Abstract:
Papeles de POBLACIóN: un esfuerzo académico relevante
José Martínez vilchis
Papeles de población , 2006,
Abstract:
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