Search results for "Presentation"
showing 10 items of 2405 documents
Subject, World and Value
2010
El punto de partida del artículo es el siguiente: Wittgenstein determinó su propósito de trazar un límite a la expresión lingüística del pensamiento sirviéndose, en cierta manera, de la distinción entre representación y voluntad con que Schopenhauer había reinterpretado la distinción kantiana entre el fenómeno y la cosa en sí. Al igual que Schopenhauer, Wittgenstein sostiene que el mundo de la ciencia corresponde al fenómeno, al mundo como ‘representación’, al mundo de los hechos; e igualmente considera que todo cuanto tiene que ver con los asuntos de máxima importancia y valor para nosotros —el sentido de nuestra existencia o de la existencia del mundo, la relación entre el sujeto de la vo…
Langerhans Cells Prevent Autoimmunity via Expansion of Keratinocyte Antigen-Specific Regulatory T Cells
2017
Langerhans cells (LCs) are antigen-presenting cells in the epidermis whose roles in antigen-specific immune regulation remain incompletely understood. Desmoglein 3 (Dsg3) is a keratinocyte cell-cell adhesion molecule critical for epidermal integrity and an autoantigen in the autoimmune blistering disease pemphigus. Although antibody-mediated disease mechanisms in pemphigus are extensively characterized, the T cell aspect of this autoimmune disease still remains poorly understood. Herein, we utilized a mouse model of CD4+ T cell-mediated autoimmunity against Dsg3 to show that acquisition of Dsg3 and subsequent presentation to T cells by LCs depended on the C-type lectin langerin. The lack of…
Cellular and molecular mechanisms in the induction phase of contact sensitivity.
1995
During the induction phase of contact sensitivity, hapten-specific Th1 cells are primed by epidermal Langerhans cells. These Langerhans cells present hapten on MHC class II molecules and provide costimulatory signals. This presentation discusses the induction of cytokines in Langerhans cells and keratinocytes by haptens and their regulatory effects on contact sensitivity. Haptens were painted on the skin of normal BALB/c mice and epidermal cells were prepared at various times thereafter. Langerhans cell-derived interleukin (IL)-1 beta mRNA was observed as early as 15 min after hapten paining. In keratinocytes, tumor necrosis factor-alpha, IL-1 alpha, IP-10, MIP-2 and IL-10 were found to be …
Verbal and visual representations in task redesign: how different viewpoints enter into information systems design discussions
2005
We explore an important phase of information systems design (ISD), namely task redesign, and especially how different viewpoints enter into the dis- cussions. We study how one particular visual representation, a process diagram, is interpreted and how alternative, even competing, representations are produced verbally. To tie the visual and verbal representations and the representational prac- tices to wider social practices, we develop and use the Extended Three-dimen- sional Model of discourse. Visual representations emerged as focal in bringing in the different viewpoints and as reference points for discussions. Our model pro- vided a focused and powerful means to unveil for the outside r…
The role of social report for performance measurement of museums: an Italian survey from the web
2017
This paper aims to explore the concept of performance in the museum field, in particular whether and how it could find an adequate representation through social reporting tools. The social reports, indeed, in non-profit and public sector organisations are typically considered the main tools for institutional communication. To investigate on this topic, we analyse the social reports of some Italian museums using the content analysis in order to understand how the performance is evaluated and communicated. The empirical findings show how the reports are not fully able to represent the performance of the museums.
FCA-based knowledge representation and local generalized linear models to address relevance and diversity in diverse social images
2019
Abstract In social image retrieval, the main goal is to offer a relevant but also diverse result set of images to the user. To address relevance and diversity at the same time, we propose a multi-modal procedure. This approach deals with the diversification problem using a two-step procedure based on the application of Formal Concept Analysis (FCA) to organize the text content of the images, followed by a Hierarchical Agglomerative Clustering (HAC) step to find the topics addressed by the images. FCA detects the latent concepts covered by the images in the result set, organizing them according to these concepts. In the second step, clustering is carried out to group together the ones with a…
Knowledge Representation in Extended Pawlak’s Information Systems: Algebraic Aspects
2002
The notion of an information system in Pawlak's sense is extended by introducing a certain ordering on the attribute set, which allows to treat some attributes as parts of others. With every extended information system S associated is the set K(S) of those pieces of information that, in a sense, admit a direct access in S. The algebraic structure of the "information space" K(S) is investigated, and it is shown, in what extent the structure of S can be restored from the structure of its information space. In particular, an intrinsic binary relation on K(S), interpreted as entailment, is isolated, and an axiomatic description of a knowledge revision operation based on it is proposed.
Knowledge Representation on the Web Revisited: The Case for Prototypes
2016
Recently, RDF and OWL have become the most common knowledge representation languages in use on the Web, propelled by the recommendation of the W3C. In this paper we examine an alternative way to represent knowledge based on Prototypes. This Prototype-based representation has different properties, which we argue to be more suitable for data sharing and reuse on the Web. Prototypes avoid the distinction between classes and instances and provide a means for object-based data sharing and reuse.
<title>HAP: a hybrid system for reasoning about actions and plans in robotics</title>
1990
The paper describes the main ideas and principles of HAP (Hybrid representation of Actions and Plans), a system for hybrid representation and reasoning in advanced robotics. In this context, hybrid representation refers to the integration of both symbolic and analogic knowledge representation paradigms. In particular, the logic/symbolic component is based on a KL-ONE-like representation language. The system embeds "analogic experts", that are concurrent procedures operating in a direct and fast way on the world representation. These "experts" help the system in planning a correct temporal sequence of actions. As a reference scenario, assembly (and disassembly) problems are considered. The a…
Handling Context-Sensitive Temporal Knowledge from Multiple Differently Ranked Sources
1999
In this paper we develop one way to represent and reason with temporal relations in the context of multiple experts. Every relation between temporal intervals consists of four endpoints’ relations. It is supposed that the context we know is the value of every expert competence concerning every endpoint relation. Thus the context for an interval temporal relation is one kind of compound expert’s rank, which has four components appropriate to every interval endpoints’ relation. Context is being updated after every new opinion is being added to the previous opinions about certain temporal relation. The context of a temporal relation collects all support given by different experts to all compon…