1,723,703 research outputs found
Jets structure in Pb-Pb colisions at LHC energies /
No full text\ua0tesis que para obtener el grado de Doctor en Ciencias (Física), presenta Isabel Domínguez Jiménez ; asesor Guy Paic, Eleazar Cuautle Flores, Jesús Guillermo Contreras Nuño. xii, 88 páginas :\ua0ilustraciones. Doctorado en Ciencias (Física)\ua0UNAM, Instituto de Física,\ua0201
Measurement of the transverse sphericity in minimum Bias proton-proton collisions at s\ua0= 0.9, 2.76 and 7 TeV with Alice at the LHC /
No full text\ua0tesis que para obtener el grado de Doctor en Ciencias (Física), presenta Antonio Ortiz Velasquez ; asesor Guy Paic, Eleazar Cuautle Flores, Luis Fernando Urrutia Ríos. 139,[1] páginas :\ua0ilustraciones, diagramas. Doctorado en Ciencias (Física)\ua0UNAM, Instituto de Ciencias Nucleares,\ua0201
Un corazón capaz de transformarnos y transformar el mundo
Get PDFSaúl Cuautle Quechol, S. J. † Rector de la Universidad Iberoamericana Ciudad de México-Tijuana (2020-2021). El presente texto reproduce el mensaje que dirigió a la comunidad Ibero el 20 de mayo de 2021, al iniciarse el Año Ignaciano.Estamos por iniciar el Año Ignaciano y quiero contarles esta historia que Ignacio de Loyola pone en su Autobiografía, y dice textualmente que después de durar un buen rato la batería, le acertó a él una bombarda en una pierna quebrándosela toda, y porque la pelota pasó por entre ambas piernas también la otra fue malherida
Numerical simulation of chua’s circuit oriented to circuit synthesis
Get PDFThe application of numerical methods based on polynomial approximation and multistep algorithms is presented to simulate the behavior of a chaotic oscillator, e.g. Chua’s circuit, which consist of five circuit elements: one linear resistor, one inductor, two capacitors and one nonlinear resistor known as Chua’s diode. The last element is modeled by an I-V piecewise-linear function to formulate a system of linear dynamic equations. This initial value problem is solved by applying numerical simulation to compute a sequence of chaotic phenomena by solving the state-variables equations describing Chua’s circuit. It is highlighted the usefulness of numerical methods to speed-up time simulation to estimate the values of the circuit elements, so that the synthesis of Chua’s diode can be realized directly using novel active devices. For instance, it is described the synthesis of Chua’s circuit using SPICE and standard CMOS integrated-circuit technology of 0.35μm, to show the control of the I-V slopes and the generation of chaotic phenomena which are in good agreement with that computed from numerical simulation
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Desarrollo y Crisis de la Nación y la literatura del Siglo XIX en México: Servando Teresa de Mier e Ignacio Manuel Altamirano
No full textEsta disertación es resultado de una amplia reflexión sobre la nación y la literatura
del XIX en México. En específico, me concentro en analizar los distintos proyectos de
nación y las ficciones fundacionales creados por los intelectuales liberales Servando
Teresa de Mier (1763-1827) e Ignacio Manuel Altamirano (1834-1893). Mier perteneció
al grupo de criollos liberales que luchó por lograr la independencia política de la Nueva
España, y Altamirano participó en la batalla que emprendieron los mestizos reformistas
por forjar una identidad nacional a través de la implementación de un programa
modernizador para México.1 Las nociones clave de ―liberalismo mexicano‖, ―nación‖ y
de ―ficciones fundacionales‖ en las que se basa mi disertación son deudoras, entre otros,
de los trabajos: The First America, de David A. Brading, Immagined Communities, de
Benedict Anderson; y el de Foundational Fictions, de Doris Sommer.2 Partiendo de la
definición del liberalismo mexicano como una serie heterogénea de ideas y prácticas
políticas y culturales que influyeron en la transformación del México del siglo XIX,
relaciono la idea anterior con la definición que Anderson ofrece para nación, como ―una
comunidad política imaginada como inherentemente limitada y soberana
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Designing Chua’s circuit from the behavioral to the transistor level of abstraction
Get PDFA MATLAB program is presented to design Chua’s circuit by applying state-variables at the behavioral level of
abstraction. The user can interact with the program to calculate state trajectories by modifying the values of five
circuit-elements: a resistor, two capacitors, an inductor and a nonlinear resistor, i.e. Chua’s diode (NR). NR is modeled
by a piecewise-linear i–v characteristic which is synthesized further by analog building blocks at the transistor level of
abstraction. Finally, Chua’s circuit is simulated by using SPICE and standard CMOS integrated-circuit technology, whose
results are in good agreement with MATLAB
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