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Aplication of the Simulation Process During the Working Practice of Chemical Engineering Students Aplicación de la simulación de procesos durante la práctica laboral de estudiantes de Ingeniería Química
Mario Jesús Mu?oz Batista,Alain Pérez González,Osvaldo Gozá León,Nelson Llovet de Armas
Revista Cubana de Ingeniería , 2011, DOI: 10.1234/rci.v2i3.54
Abstract: The success of chemical engineering graduates depends on their aptitude and the skills received during the academic formation. Employers not only require that graduates have the knowledge of basic chemical engineering principles but knowing how to apply this knowledge in solving practical problems. In this paper, one form to obtain important skills is presented. The working practice is one of the most important subjects in the curriculum. HYSYS simulator which can realize the energetic evaluation was introduced. A simulation model of the preheat train of Fluid Catalytic Cracking Unit was obtained. The model was built using prebuilt models in HYSYS, however a fired heater to steady state doesn’t exist. In this case, a spreadsheet was utilized in programming the energetic evaluation. Sometimes it is useful because it is necessary to use our models for specific equipment. Finally, the model was utilized to predict the system efficiency when changes on the operation variables occur. The use of simulation inside of core subjects helps to improve the level and quality of students’ formation. El éxito de los graduados de Ingeniería Química depende en gran medida de cuáles habilidades y aptitudes han incorporado durante su formación. Los empleadores de estos graduados no solo requieren que los mismos tengan un conocimiento acumulado de los principios básicos de la ingeniería, sino que además los puedan aplicar de manera creativa en la solución de problemas que se presentan en la práctica. Este trabajo trata acerca de una de las formas que contribuye a que los estudiantes adquieran habilidades importantes para su posterior desempe o dentro de las industrias de procesos. En la práctica laboral de los estudiantes de ingeniería de tercer a o se introduce el uso del simulador HYSYS para realizar la evaluación energética. Se muestra el esquema de simulación obtenido del banco de precalentamiento de una unidad de craqueo catalítico fluidizado. El modelo es construido de manera tal que se utilizan los módulos predefinidos en HYSYS, sin embargo, para la evaluación energética del horno se emplea la hoja de cálculo del programa donde se programan las expresiones que se utilizan para la evaluación energética de este tipo de equipamiento. Esto último da la posibilidad desde el punto de vista metodológico de se alar acerca de la necesidad que a veces se tiene de utilizar modelos propios para la simulación de equipos específicos. Finalmente, el modelo de simulación es empleado para estudiar el comportamiento energético del sistema ante cambios en algunas de las variables de o
Las ontologías en la representación y organización de la información
González Pérez,Yanelis;
ACIMED , 2006,
Abstract: the need of a change in the processing of information in the web environment is analyzed. the common and divergent theoretical aspects related to the practices that have historically marked the processes that structure the phase of information organization and representation, are valued from the point of view of the introduction and utilization of ontology. the methodological, linguistic and epistemologic features that should guide its construction as well as the opportunities and challenges ontology present in this phase of the cycle of life of information are undertaken. a processing of the information dealing with the meaning of words in the web environment becomes indispensable
La evaluación del aprendizaje: tendencias y reflexión crítica
González Pérez,Miriam;
Educaci?3n M??dica Superior , 2001,
Abstract: the article identifies the main tendencies in the conception of learning evaluation, the functions it performs and the contents or object to be evaluated from historical and future projection perspectives. a critical analysis is made on some key aspects of evaluation, with a view to stressing the formative and educational nature of the learning evaluation and its many determinations
TAREAS FORENSES DE LA PSIQUIATRíA Y OTROS VíNCULOS CON EL DERECHO PENAL Y LA CRIMINOLOGíA
Pérez González,Ernesto;
Revista Colombiana de Psiquiatría , 2005,
Abstract: in this article the author describes the aims and objectives of psychiatry in relation with the criminal sciences, emphasizing issues such as expert intervention and assessment in complex cases, all of them restrained by different and specific laws and rules. each one of these tasks may use a different focus in solving a problem, which is not necessarily appropriate in solving another. that is why the definition of these aims is important. the author also defines the experts" issues in relation with the mental state of a person at specific moment of the criminal process, according to the person"s role as perpetrator, victim, witness or inmate. in those cases answers are needed in relation with the way the criminal process categorizes each one, which differs from the way psychiatry does. there is a risk in the fact that one expert, taking over different functions, may make use of differing methods to arrive to erroneous conclusions, like for example when he concludes insanity based on a criminological analysis instead of using a clinical one, or uses only a clinical analysis in a criminological investigation. finally, the main differences between psychiatry and criminology are presented. the authorsargues that many of their functions are interdisciplinary in nature, which determines the fact that other specialists other than psychiatrists, such as psychologists, neurophysiologists and others, contribute in knowledge and skills to achieve the final objective.
El Médico de Familia cubano y su contribución en la lucha contra el SIDA en áfrica
González Pérez,Camilo;
Revista Cubana de Medicina General Integral , 2002,
Abstract: the aim of this paper is to show experience of a group of cuban internationalist physicians who give our medical cooperation in one of the poorest countries in the world, niger. we explain how the cuban family physician contributes to the fight against aids in africa, how he/she identifies the problem, how he/she defines the causative factors of aids and we outline the fundamental activities of the fight against aids. the main achievement stated in the paper is that public health authorities as well as the government in niger are now more aware of the aids problem thanks to the work carried out by the cuban physicians, among others.
Génesis de los estudios sobre música colonial hispanoamericana: un esbozo historiográfico
Juliana Pérez González
Fronteras de la Historia , 2004,
Abstract: En este artículo se hace un recorrido por los escritos más representativos sobre música colonial de hispanoamérica publicados entre 1876 y 1976. El tema ha despertado interés desde finales del siglo XIX en músicos con poca formación en ciencias humanas y, a partir de los a os sesenta, en la musicología. A lo largo del ensayo se analiza la forma en que autores en diferentes países y momentos clasificaron la música colonial, y los temas más trabajados, como la música indígena, de los esclavos, en la catedral, en las misiones, la música doméstica y los instrumentos utilizados en su interpretación. El objetivo general es mostrar cómo los diferentes matices puestos en los temas y la clasificación están relacionados con el momento que vivió cada autor y con las herramientas documentales y mentales que su tiempo le ofreció.
Las ontologías en la representación y organización de la información Use of ontology in information representation and organization
Yanelis González Pérez
ACIMED , 2006,
Abstract: Se analiza la necesidad de un cambio en el procesamiento de la información para el entorno Web. A partir de la introducción y utilización de las ontologías en los procesos que conforman la fase de organización y representación de la información, se valoran los aspectos teóricos comunes y divergentes en relación con las prácticas que han marcado históricamente estos procesos. Se abordan los lineamientos lingüísticos, metodológicos y epistemológicos que deben guiar su construcción, así como las oportunidades y retos que las ontologías plantean en esta fase del ciclo de vida de la información. Es imprescindible un procesamiento de la información que considere el significado de las palabras en el ambiente Web The need of a change in the processing of information in the Web environment is analyzed. The common and divergent theoretical aspects related to the practices that have historically marked the processes that structure the phase of information organization and representation, are valued from the point of view of the introduction and utilization of ontology. The methodological, linguistic and epistemologic features that should guide its construction as well as the opportunities and challenges ontology present in this phase of the cycle of life of information are undertaken. A processing of the information dealing with the meaning of words in the Web environment becomes indispensable
TAREAS FORENSES DE LA PSIQUIATRíA Y OTROS VíNCULOS CON EL DERECHO PENAL Y LA CRIMINOLOGíA Forensic Tasks of Psychiatry and Bonds with Criminal Law and Criminology
Ernesto Pérez González
Revista Colombiana de Psiquiatría , 2005,
Abstract: Este artículo aborda el problema de la definición de objetivos de la psiquiatría en sus diversos vínculos con las ciencias penales, especialmente aquellos que resultan una intervención pericial penal, sujeta en sus aspectos a regulaciones procesales y que constituyen las funciones propiamente forenses del psiquiatra. Cada una de estas tareas da un producto específico para la solución de determinado problema, no necesariamente útil para otro, de ahí la importancia de su definición. Se definen las tareas periciales, las que responden a incógnitas penales sobre aspectos del estado mental de personas en momentos específicos, según sean perpetradores de delito, reos, víctimas o testigos, y las que precisan respuestas diferentes en función de la forma como el proceso penal las categoriza, de forma distinta a la psiquiatría. Más allá de la ubicación formal de vínculos, se deduce el riesgo de que un mismo experto, al asumir distintas funciones, emplee en la solución de un problema el discurso o métodos propios del otro, para arribar así a conclusiones contextualmente erróneas, tal como puede ocurrir si se trata de arribar a conclusiones sobre una eventual inimputabilidad a partir de un análisis criminológico, en vez del puramente clínico, o si se limita al análisis clínico la investigación criminológica. Se presentan las diferencias entre psiquiatría y criminología. Luego se argumenta el carácter interdisciplinario que tienen muchas de estas funciones, lo que determina que otros especialistas no psiquiatras, como psicólogos, neurofisiólogos y otros, aporten en ocasiones conocimientos y habilidades decisivos para el logro de los objetivos. In this article the author describes the aims and objectives of Psychiatry in relation with the Criminal Sciences, emphasizing issues such as expert intervention and assessment in complex cases, all of them restrained by different and specific laws and rules. Each one of these tasks may use a different focus in solving a problem, which is not necessarily appropriate in solving another. That is why the definition of these aims is important. The author also defines the experts" issues in relation with the mental state of a person at specific moment of the criminal process, according to the person"s role as perpetrator, victim, witness or inmate. In those cases answers are needed in relation with the way the criminal process categorizes each one, which differs from the way Psychiatry does. There is a risk in the fact that one expert, taking over different functions, may make use of differing methods to arrive to erroneous conclus
Democratic consolidation in sub-Saharan Africa
ángel Pérez González
Revista CIDOB d'Afers Internacionals , 2001,
Abstract: The contributions made by theory on democratic consolidation in Eastern Europe are also pertinent to analysis of processes of democratization and democratic consolidation in other areas, such as sub-Saharan Africa. The parameters of analysis highlight the importance of a strong state (organized, with legitimated institutions) and a structured society (whether multiethnic or not) as necessary conditions for democratization. On the assumption that the colonizing powers basically used two models –the French assimilationist model and the British indirect government model– the study of how these conditions were fulfilled in various sub-Saharan states leads to two conclusions: the first, the possibility of a process of democratization in those states where European (French) colonization produced a total assimilation of the colonized society, including above all the colonizer’s political values; and the second, the possibility of processes of democratization in states produced by British colonization where the indigenous structures and those of the metropolis were superimposed, a phenomenon which allowed the application of democratic values by legitimated local institutions.
Russian Minorities in the Former USSR
ángel Pérez González
Revista CIDOB d'Afers Internacionals , 2000,
Abstract: The end of the Soviet Empire has brought out the importance of the nationalities problem and the contradictory results produced by the various formulas applied since 1922 for resolving it. Two characteristics conditioned the evolution of this problem in the Soviet Union: the choice of a territorial model which would give a important role to the Empire’s non-Russian peoples; and the contradiction between the theoretical base established by Lenin and Stalin for solving the problem and actual practice, which followed traditional channels. The result was a new territorial structure endowed with the external elements characteristic of a state but cancelled out by the superiority of a party and by a policy ofprotecting minorities deliberately designed to make the new national entities nonviable. The lack of an adequately institutionalized state was at the root, of the virtual disappearance, after the collapse of the Communist Party, of links between the center and the periphery, a situation that nationalism, where it existed, exploited to gain powerand that governing minorities, meaningless outside the framework created by the USSR, exploited to stay in power. The result was none other than the appearance of new ethnically heterogeneous states with imprecise borders, bereft of the systems of interethnic equilibriumthe Soviet administration had created, and willing to consolidate their independence and identity at the expense of minorities such as the Russians, which have been discriminated against at times and excluded from political and cultural life at others. This phenomenonhas reduced the chances for the new states’ integration on an international level, placed a burden on the incipient democratic systems and made for tense relations with Russia.
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