View-Based Strategies for 3D Object Recognition

A persistent issue of debate in the area of 3D object recognition concerns the nature of the experientially acquired object models in the primate visual system. One prominent proposal in this regard has expounded the use of object centered models, such as representations of the objects' 3D structures in a coordinate frame independent of the viewing parameters [Marr and Nishihara, 1978]. In contrast to this is another proposal which suggests that the viewing parameters encountered during the learning phase might be inextricably linked to subsequent performance on a recognition task [Tarr and Pinker, 1989; Poggio and Edelman, 1990]. The 'object model', according to this idea, is simply a collection of the sample views encountered during training. Given that object centered recognition strategies have the attractive feature of leading to viewpoint independence, they have garnered much of the research effort in the field of computational vision. Furthermore, since human recognition performance seems remarkably robust in the face of imaging variations [Ellis et al., 1989], it has often been implicitly assumed that the visual system employs an object centered strategy. In the present study we examine this assumption more closely. Our experimental results with a class of novel 3D structures strongly suggest the use of a view-based strategy by the human visual system even when it has the opportunity of constructing and using object-centered models. In fact, for our chosen class of objects, the results seem to support a stronger claim: 3D object recognition is 2D view-based.

The Outline View

When creating a document it can be difficult to know from the outset what the final layout and structure of a document should be. Using headings and styles, users can create a document and structure it appropriately at the end using the outline function.

An Economists View of Web Science

Social Networking explained by an economic model of cost and benefit.

How to setup a basic Photoshop with Print in view (300dpi)

Video on how to setup a Basic Photoshop document with the view to outputting a Printable PDF.

A sociological view of family law in Colombia. Radicalism-1945

This paper affirms that the economic and political failure of the Radical Period provided opportunities for those who proposed Regeneration as a means of defending authority. Family law became an important tool in that process. During the period studied by this article, the equality clause remained in Colombian constitutions without any practical affect for the majority of the people. Discrimination was imposed through family law over those who had born outside of a Catholic marriage and/or had not previously legitimized their union through a Catholic ceremony. By the middle of the 20th century, the dramatic situation of the nation’s children led to efforts to change the social prejudices through legislation, that is, in the same way the prejudices had been imposed.

Impulsivity: A view from the behavioral neuroscience and developmental psychology

Impulsivity has been linked to three main factors: performing without direct involvement of the frontal lobe functions, an increase in the speed of response, and the acquisition of immediate gratification. This behavioral inhibition deficit involves a variety of behaviors including aspects of hyperexcitability, behavioral disinhibition and higher order decision making. Although by tradition, the definition of this executive function has been conceptualized from a psychopathological view, currently, the wide variety of neuropsychological, developmental and animal models assessment techniques encourage us to establish dialogues that integrate the knowledge of these theoretical perspectives for the interpretation and understanding of impulsivity.

Informal housing in the XXI century. Characteristics of the informal land and housing supply in Bogota during the first decade of the XXI century

This article characterizes the conditions of the informal land and housing supply during the first decade of the xxi century in Bogota, regarding magnitude and location of the informal urban growth (new occupations in the periphery and informal densification of consolidated areas), housing  conditions in recent occupations and the characteristics of the land market. The situation of the  last decade has been reconstructed based in aerial photography analysis, census data quantification  and data analysis from planning and control public entities. Results suggest that due to the relative  land scarcity in Bogotá, among other aspects, the informal market dynamics have experimented changes compared to previous decades, because the growth in consolidated urban areas becomes  more important than the informal urbanization of the peripheries, but at the same time informality  transcends the municipal perimeter to the neighboring municipalities.

Development, resistance and change. A point of view from Río Negro’s steppe

In this paper we search the concept of nonviolent resistance inquiring a rural experience from Rio Negro´s steppe. The initiative highlights the need to recognize  the context of the resistance exercise and the consideration of three aspects: the evaluation and interpretation of space, the dispute to public policy and the  restructuring of the family order. These three elements, which overlap material  and symbolic aspects, are discussed from an organization of trade domestic craft production. The notion of “development” is discovered on the basis of the  frameworks of values from which the reproduction of subordination is associated  with this idea, and even the challenge of change is the basis of the proposal which reviews that development idea, and illuminates from this complexity the notion  of “nonviolent resistance”.

Estrategia de intervención militar de Estados Unidos en Medio Oriente: dinámicas y consecuencias del uso de drones en Yemen y Pakistán entre 2009 a 2013

Este es un estudio sobre la estrategia de guerra estadounidense en Medio Oriente basada en el uso sistemático de drones durante el periodo comprendido entre 2009 y 2013. Se busca explicar de qué manera puede considerarse el uso de este tipo de armamento como una práctica basada en la proyección de poder sin mayor vulnerabilidad. Los casos de Pakistán y Yemen son abordados, ya que evidencian las características de las operaciones selectivas por las que ha abogado el Presidente Obama. El estudio se inscribe dentro del realismo ofensivo, haciendo también referencia a sus limitaciones explicativas. Empero, se afirma que las dinámicas y consecuencias de la utilización de drones son intrínsecas a la necesidad estadounidense de combatir actores no estatales mediante prácticas que garanticen su seguridad y pretensiones hegemónicas a pesar de las implicaciones políticas , legales y sociales en las que puede incurrir.

The world of St. Francis Xavier : a view of the XVI century through the life of St. Francis Xavier. 'El mundo de Javier : una visión del siglo XVI a través de la vida de San Francisco Javier'.

Resumen tomado de la web del Departamento de Educación

All in all : a plural view of our teaching and learning. 'En total : una visión plural de nuestra enseñanza y aprendizaje'.

Textos en español y en inglés

The roman invasion : from different points of view.

Texto con ilustraciones destinado a los alumnos de Primaria para que aprendan acontecimientos históricos desde los diferentes puntos de vista de sus protagonistas. Aquí se narra el enfrentamiento entre el emperador Claudio y el jefe de las tribus de Britania ante la invasión romana de la isla.

The vikings : from different points of view.

Los acontecimientos históricos se acercan a los alumnos de Primaria desde los diferentes puntos de vista de sus protagonistas. Se narra la vida y viajes del pueblo vikingo y su ataque a Inglaterra como la lucha de un pueblo procedente de un país pobre en busca de una tierra rica.

Educational development - a view from outside : national trends and institutional issues at Imperial College London. 'El desarrollo Educativo, una mirada externa: rasgos nacionales y aspectos institucionales en el caso del Imperial College London'.

Resumen tomado de la publicación