Suchergebnisse

We sketch the history of spectral ranking - a general umbrella name for techniques that apply the theory of linear maps (in particular, eigenvalues and eigenvectors) to matrices that do not represent geometric transformations, but rather some kind of relationship between entities. Albeit recently made famous by the ample press coverage of Google's PageRank algorithm, spectral ranking was devised more than 60 years ago, almost exactly in the same terms, and has been studied in psychology, social sciences, bibliometrics, economy, and choice theory. We describe the contribution given by previous scholars in precise and modern mathematical terms: Along the way, we show how to express in a general way damped rankings, such as Katz's index, as dominant eigenvectors of perturbed matrices, and then use results on the Drazin inverse to go back to the dominant eigenvectors by a limit process. The result suggests a regularized definition of spectral ranking that yields for a general matrix a unique vector depending on a boundary condition.

Most modern recommendation systems use the approach of collaborative filtering: users that are believed to behave alike are used to produce recommendations. In this work we describe an application (Liquid FM) taking a completely different approach. Liquid FM is a music recommendation system that makes the user responsible for the recommended items. Suggestions are the result of a voting scheme, employing the idea of viscous democracy [3]. Liquid FM can also be thought of as the first testbed for this voting system. In this paper we outline the design and architecture of the application, both from the theoretical and from the implementation viewpoints.

The aim of this paper is to analyze the construction of different discourses about the prehispanic past in Chascomús. These constructions were crystalized through the archaeological materials exhibitions in the local museum. We study the institucional politics carried out since the time of the museum foundation (1939) until the last renovation of the archaeological gallery (1992) at a local scale. Besides we discuss the influence of diffe-rent social agents (collectors, archaeologists and the museum staff) in the classification and interpretation of the archaeological materials. Three instances of organization and interpretation of these remains are distinguished. These include the Museum foundation and the discussions around the institutional project, the organization of the archaeological exhibition with private collections and finally, the last reorganization with the incorporation of materials recovered in archaeological investigations. These instances involved changes in the major historical context, the theoretical discussions and the use of different techniques and concepts that allowed comprehending the lifestyle of the prehispanic groups. ; Este trabajo analiza los procesos de construcción de diferentes narrativas sobre el pasado indígena en Chascomús que se materializaron en las exposiciones de objetos arqueológicos del Museo Pampeano de la localidad. Se indagan las principales políticas institucionales que se aplicaron través del tiempo y se discute el modo en que coleccionistas, investigadores y personal del Museo participaron en la clasificación e interpretación de los materiales. Se trata de un análisis a escala local y diacrónico que abarca el período comprendido entre los años 1939 (fundación del Museo) y 1992 (último reciclaje de la sala con materiales arqueológicos). Proponemos que existieron tres momentos de organización y reinterpretación de los materiales arqueológicos: la fundación del Museo y las discusiones en torno al proyecto institucional; la creación de un espacio expositivo diferenciado con materiales arqueológicos provenientes de colecciones privadas y por último, su reorganización con nuevos materiales procedentes de investigaciones arqueológicas realizadas con aval del Estado. Estos cambios implicaron discusiones teóricas, el empleo de diferentes categorías y técnicas que permitieron entender el modo de vida de las poblaciones indígenas de la región.

The aim of this paper is to analyze the construction of different discourses about the prehispanic past in Chascomús. These constructions were crystalized through the archaeological materials exhibitions in the local museum. We study the institucional politics carried out since the time of the museum foundation (1939) until the last renovation of the archaeological gallery (1992) at a local scale. Besides we discuss the influence of diffe-rent social agents (collectors, archaeologists and the museum staff) in the classification and interpretation of the archaeological materials. Three instances of organization and interpretation of these remains are distinguished. These include the Museum foundation and the discussions around the institutional project, the organization of the archaeological exhibition with private collections and finally, the last reorganization with the incorporation of materials recovered in archaeological investigations. These instances involved changes in the major historical context, the theoretical discussions and the use of different techniques and concepts that allowed comprehending the lifestyle of the prehispanic groups. ; Este trabajo analiza los procesos de construcción de diferentes narrativas sobre el pasado indígena en Chascomús que se materializaron en las exposiciones de objetos arqueológicos del Museo Pampeano de la localidad. Se indagan las principales políticas institucionales que se aplicaron través del tiempo y se discute el modo en que coleccionistas, investigadores y personal del Museo participaron en la clasificación e interpretación de los materiales. Se trata de un análisis a escala local y diacrónico que abarca el período comprendido entre los años 1939 (fundación del Museo) y 1992 (último reciclaje de la sala con materiales arqueológicos). Proponemos que existieron tres momentos de organización y reinterpretación de los materiales arqueológicos: la fundación del Museo y las discusiones en torno al proyecto institucional; la creación de un espacio expositivo diferenciado con materiales arqueológicos provenientes de colecciones privadas y por último, su reorganización con nuevos materiales procedentes de investigaciones arqueológicas realizadas con aval del Estado. Estos cambios implicaron discusiones teóricas, el empleo de diferentes categorías y técnicas que permitieron entender el modo de vida de las poblaciones indígenas de la región.

The prominence of religion in recent debates around politics, identity formation, and international terrorism has led to an increased demand on those studying religion to help clarify and contextualise religious belief and practice in the public sphere. While many texts focus on the theoretical development of the subject, this book outlines a wider application of these studies by exploring the role of religious studies scholars and theologians as public intellectuals.Looking at the individual and collective role of religious studies scholars and theologians in public life, this book will be of great interest to all scholars and academics involved in religious studies and theology across the academy.This collection of essays first seeks to define exactly what makes an intellectual "public". It then goes on to deal with a few questions of concern: How do public intellectuals construct knowledge in religious and theological scholarship? What is the link between public intellectuals of higher education and their role in society? Do higher education institutions have a responsibility to endorse public intellectualism?.