139,711 research outputs found
Co-author model with homophily
No full textEn el presente trabajo se muestra una extensión del conocido modelo del coautor desarrollado en (Jackson y Wolinsky, 1996). En este documento puede encontrarse una modificación de este modelo donde se toma en cuenta la marcada tendencia del ser humano a relacionarse con otros individuos similares. Se propone esta adición con la intención de encontrar redes cuya estructura cumpla con las definiciones de eficiencia y estabilidad por pares al mismo tiempo. El principal objetivo del modelo es mostrar que la homofilia permite lidiar con el conflicto existente en el modelo del coautor con respecto a las estructuras en redes socialmente optimas y redes individualmente óptimas.This work shows an extension of the well-known model of the co-author developed in (Jackson and Wolinsky, 1996). In this document a modification of this model can be found where the marked tendency of the human being to relate to other similar individuals is taken into account. This addition is proposed with the intention of finding networks whose structure meets the definitions of efficiency and stability in pairs at the same time. The main objective of the model is to show that homophily makes it possible to deal with the existing conflict in the co-author’s model regarding the structures in socially optimal networks and individually optimal networks
La nueva comunicación de marca a raíz del cambio de perspectiva de género : el caso de Mr. Músculo, Ayudín y Cif
No full textEste trabajo aborda los cambios implementados en las estrategias de las marcas ligadas al rubro limpieza del hogar, de acuerdo a la nueva perspectiva de género. Particularmente, se precisa si sus comunicaciones se adecuaron al contexto y las tendencias actuales - motivando repercusiones y percepciones positivas de los consumidores hacia estas compañías - generando una mayor credibilidad, legitimidad y lealtad. Adicionalmente, se intenta constatar si las renovaciones surgen por un interés meramente comercial, ligado al Purplewashing, o por una verdadera responsabilidad social. A tal efecto, se realiza un análisis integral, que comprende las dimensiones de producción y recepción, para lograr una mirada clara y completa sobre el asunto. En lo que respecta al primer plano, a partir de la examinación de las campañas publicitarias de las principales empresas de la categoría (Mr.Músculo, Ayudín y Cif) - efectuadas en Argentina, entre el período 2010-2021 - se destacan las buenas prácticas y cuáles son aquellos punto a mejorar. Vinculado al segundo aspecto, se incorporan estadísticas y entrevistas en profundidad con consumidores, feministas y profesionales del marketing; para advertir las opiniones de los distintos actores implicados en el fenómeno, conformes a las posturas tomadas por las corporaciones a propósito de la igualdad de género. De tal modo, a lo largo de esta tesina, se disciernen las múltiples causas y factores por los cuales, más allá del camino elegido por cada una de las marcas, la categoría todavía se encuentra en un estadio inicial respecto a una correcta transición. En conclusión, este proyecto es relevante y pertinente para el campo de la comunicación en tanto, la problemática estudiada como las nuevas circulaciones de sentido y efectos que genera, introducen debates y reflexiones en el espacio de las representaciones y luchas de poder simbólico. Por ello y a pesar de que el enfoque puntualiza en la temática feminista, sirve como ejemplo y referencia para asuntos similares - que incluyan hechos y filosofías con fuerte impacto en lo político-social y cultural - como el cuidado ambiental o el movimiento LGBTQ+.Fil: Wolinsky, Daniela. Universidad de Buenos Aires. Facultad de Ciencias Sociales. Buenos Aires, Argentin
¿Cuál fue la relación entre el Covid-19 y el rendimiento académico universitario argentino?: El caso de la Facultad de Ciencias Económicas de la Universidad de Buenos Aires
No full textLos estudiantes universitarios constituyen la fuente principal de la formación de capital humano de un país, y la pandemia del Covid-19 tuvo efectos aún poco conocidos en ellos en Argentina. En este trabajo se analizaron los efectos del Covid-19 y Covid-19 prolongado en el rendimiento académico de los estudiantes de la Universidad de Buenos Aires, Argentina, tomando el caso de la Facultad de Ciencias Económicas, ya que es la más poblada del país y representativa de la configuración socioeconómica del país. En sintonía con la literatura médica, se consideró al Covid prolongado como la persistencia de los síntomas asociados al Covid, luego de cuatro semanas de detectado el contagio. A partir de una muestra estratificada extraída en dicha facultad en junio de 2022 para 604 registros efectivos, de los cuales la mitad tuvieron al menos un episodio de Covid y entre ellos un tercio síntomas prolongados, se corrieron 13 regresiones logísticas para explicar la relación entre la enfermedad y el rendimiento académico relativo (variable explicada) de los alumnos desde el inicio de la pandemia. Ello controlando por variables socioeconómicas, demográficas, tecnológicas dada la virtualidad de la enseñanza, el ausentismo a clase, la existencia de enfermedades preexistentes y los tipos de síntomas. Mientras que el Covid Largo resultó tener un efecto negativo y significativo en el rendimiento académico en aquellos individuos que tuvieron Covid, el Covid en sus distintas variantes en la muestra general resultó con el signo contrario al esperado. La vulnerabilidad socioeconómica y el ausentismo a clase impactaron en general negativa y muy significativamente sobre el rendimiento académico, pudiendo estar correlacionadas con el Covid no prolongado.Fil: Grandes, Martin. Universidad de Buenos Aires. Facultad de Ciencias Económicas. Instituto de Investigaciones Económicas. Centro de Estudios de la Estructura Económica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Wolinsky, Matías. Universidad de Buenos Aires. Facultad de Ciencias Económicas; Argentin
Spatially-localized time dependent solutions including turbulence and their interactions in 2D Kolmogorov flow
No full textIn 2D Kolmogorov flow in small aspect ratio domains, spatially-localized solutions such as kink, traveling or time-dependent kink-antikink pars coexist. However, the conservation of the flow rate in the y direction strongly restrict combination of localized solutions and their positioning. We find that by adding a homogeneous flow U y their positioning is controlled and each of localized solutions including a spatially-localized chaos is isolated. Numerical results suggest that these isolated solutions can be elements constructing a whole flow
Characteristics of overlap region in high-Reynolds number turbulent channel flow
No full textDirect numerical simulation of the fully developed turbulent channel flows have been carried out at the Reynolds number based on the friction velocity and the channel half width, 2000, 4000 and 8000. A hybrid 10th order accurate finite difference scheme in the stream and spanwise directions, and a second-order scheme in the wall-normal direction is adapted as the spatial discretization method. We observed the plateau profiles in the indicator function corresponded to the von Karman constant. Furthermore, second peak of streamwise pre-multiplied spectra were appeared in the same wall normal height, 300 < y+ < 600, in case of Re = 4000. Nevertheless, the effects of the lager than the channel half height scale on the streamwise turbulent intensity are fixed contributions without dependence on Reynolds number. These results suggested that the new streamwise vortexes are formed between buffer layer and outer layer with increasing of Reynolds number
La 'circunstancia' de 'Herederos y Pretendientes
No full textIn June 2010, the Ortega y Gasset Foundation hosted a Conference about the “Spanish Philosophical Transition” in order to debate the book of Francisco Vázquez, La filosofía española. Herederos y Pretendientes. Una lectura sociológica (1963-1990), recently published. This paper is the author’s response to criticism raised in the Conference and to published reviews received by this book. First, the author summarized the argument of Herederos y pretendientes. Secondly he responds and takes into account the most important objections against the book’s hypothesis and methodology. Finally the author evaluates the favorable judgments received by the book and suggests the limits of the historian’s task.Fundación Ortega y Gasset-Marañó
Author self-citation in orthodontics is associated with author origin and gender.
No full textBACKGROUND
The aims of this bibliometric study were to determine author self-citation trends in high-impact orthodontic literature and to investigate possible association between self-citation and publication characteristics.
METHODS
Six orthodontic journals with the highest impact factor as ranked by 2017 Journal Citation Reports were screened for a full publication year (2018) for original research articles, reviews, and case reports. Eligible articles were scrutinized for article and author characteristics and citation metrics. Univariable and multivariable negative binomial regression was used to examine associations between self-citation incidence and publication characteristics.
RESULTS
Medians for author self-citation rate of the most self-citing authors and self-citations were 3.03% (range 0-50) and 1 (range 0-19), respectively. In the univariable analysis, there was no association between self-citation counts and study type (P = 0.41), article topic (P = 0.61), number of authors (P = 0.62), and rank of authors (P = 0.56). Author origin (P = 0.001), gender (P = 0.001) and journal (P = 0.05) were associated with self-citation counts and in the multivariable analysis only origin and gender remained strong self-citation predictors. Asian authors and females self-cited significantly less often than all other regions and male authors.
CONCLUSIONS
Authors in orthodontics do not self-cite at a frequency that suggests potential citation manipulation. Author origin and gender were the only variables associated with citations counts. More bibliometric research is necessary to draw solid conclusions about author self-citation trends in orthodontic literature
A Characterization of the Nash Bargaining Solution
No full textWe characterize the Nash bargaining solution replacing the axiom of Independence of Irrelevant Alternatives with three independent axioms: Independence of Non-Individually Rational Alternatives, Twisting and Disagreement Point Convexity. We give a non-cooperative bargaining interpretation to this last axiom.bargaining problem; Nash solution; axiomatic characterization; Independence of Non-Individually Rational Alternatives; Twisting; Disagreement Point Convexity
Overview of the Author Profiling Task at PAN 2013
No full text[EN] This overview presents the framework and results for the Author Profiling
task at PAN 2013. We describe in detail the corpus and its characteristics,
and the evaluation framework we used to measure the participants performance to
solve the problem of identifying age and gender from anonymous texts. Finally,
the approaches of the 21 participants and their results are described.The author profiling task @PAN-2013 was an activity of the WIQ-EI IRSES project (Grant No. 269180) within the FP 7 Marie Curie People Framework of the European Commission. We want to thank the Forensic Lab of the Universitat Pompeu Fabra Barcelona for sponsoring the award for the winner team. The work of the first author was partially funded by Autoritas Consulting SA and by Ministerio de Economía y Competitividad de España under grant ECOPORTUNITY IPT-2012-1220-430000. The work of the second author was in the framework the DIANA-APPLICATIONS-Finding Hidden Knowledge in Texts: Applications (TIN2012-38603-C02-01) project, and the VLC/CAMPUS Microcluster on Multimodal Interaction in Intelligent Systems. The work of fifth author was funded in part by the Swiss National Science Foundation (SNF) project "Mining Conversational Content for Topic Modelling and Author Identification (ChatMiner)" under grant number 200021_130208.Rangel, F.; Rosso, P.; Koppel, M.; Stamatatos, E.; Inches, G. (2013). Overview of the Author Profiling Task at PAN 2013. CLEF Conference on Multilingual and Multimodal Information Access Evaluation. 352-365. https://riunet.upv.es/handle/10251/46636S35236
Author Co-Citation Analysis (ACA): a powerful tool for representing implicit knowledge of scholar knowledge workers
No full textIn the last decade, knowledge has emerged as one of the most important and valuable organizational assets. Gradually this importance caused to emergence of new discipline entitled ―knowledge management‖. However one of the major challenges of knowledge management is conversion implicit or tacit knowledge to explicit knowledge. Thus Making knowledge visible so that it can be better accessed, discussed, valued or generally managed is a long-standing objective in knowledge management. Accordingly in this paper author co- citation analysis (ACA) will be proposed as an efficient technique of knowledge visualization in academia (Scholar knowledge workers)
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