How People Re-find Information When the Web Changes

This paper investigates how people return to information in a dynamic information environment. For example, a person might want to return to Web content via a link encountered earlier on a Web page, only to learn that the link has since been removed. Changes can benefit users by providing new information, but they hinder returning to previously viewed information. The observational study presented here analyzed instances, collected via a Web search, where people expressed difficulty re-finding information because of changes to the information or its environment. A number of interesting observations arose from this analysis, including that the path originally taken to get to the information target appeared important in its re-retrieval, whereas, surprisingly, the temporal aspects of when the information was seen before were not. While people expressed frustration when problems arose, an explanation of why the change had occurred was often sufficient to allay that frustration, even in the absence of a solution. The implications of these observations for systems that support re-finding in dynamic environments are discussed.

Description and Theoretical Analysis (Using Schemata) of Planner: A Language for Proving Theorems and Manipulating Models in a Robot

Planner is a formalism for proving theorems and manipulating models in a robot. The formalism is built out of a number of problem-solving primitives together with a hierarchical multiprocess backtrack control structure. Statements can be asserted and perhaps later withdrawn as the state of the world changes. Under BACKTRACK control structure, the hierarchy of activations of functions previously executed is maintained so that it is possible to revert to any previous state. Thus programs can easily manipulate elaborate hypothetical tentative states. In addition PLANNER uses multiprocessing so that there can be multiple loci of changes in state. Goals can be established and dismissed when they are satisfied. The deductive system of PLANNER is subordinate to the hierarchical control structure in order to maintain the desired degree of control. The use of a general-purpose matching language as the basis of the deductive system increases the flexibility of the system. Instead of explicitly naming procedures in calls, procedures can be invoked implicitly by patterns of what the procedure is supposed to accomplish. The language is being applied to solve problems faced by a robot, to write special purpose routines from goal oriented language, to express and prove properties of procedures, to abstract procedures from protocols of their actions, and as a semantic base for English.

Highly efficient route to diselenides from the reactions of imines and selenium in the presence of carbon monoxide and water

Reactions of selenium with imines ((RRC)-C-1=NR2) of aldehydes and ketones in the presence of carbon monoxide, water and triethylamine lead to reductive selenation, on aerobic work-up, to afford symmetrical diselenides ((RRCHSe)-C-1)(2) in good to excellent yields. The proposed mechanism suggests that both in situ generated carbonyl selenide (SeCO) and hydrogen selenide (H2Se) are involved in the reaction.

CodeCharge: gerador de códigos para aplicações Web.

Características do CodeCharge.

Projeto e implementação de um modelo de controle de acesso para aplicações Web.

O objetivo deste trabalho é apresentar um modelo de controle de acesso para aplicações Web (Sistema de Informação sobre o mercado de software brasileiro) e mostrar como ele pode ser reutilizável para outras aplicações que utilizam o paradigma cliente-servidor. A ênfase do trabalho será, portanto, mostrar o modelo de controle de acesso e sua implementação usando software livre.

Um sistema especialista via web para diagnóstico e tratamento de doenças de milho baseado em um framework orientados a objetos.

2007

Publicando mapas na Web: servlets, applets ou cgi?

2003

ServCLIPS: uma ferramenta para a construção de sistemas especialistas para Web.

Arquitetura e funcionamento. Aplicações do ServCLIPS e seus componentes.

Avaliação da aplicação do II curso de uso e manejo de irrigação - via web.

Características do II curso de uso e manejo de irrigação. Perfil dos alunos. Avaliação da aplicação do curso.

Publicando mapas na Web: uso do ALOV Map.

Estudo de caso com a microbacia do Taquara Branca, Sumaré, SP. Definindo a estratégia de interação com mapas. Definindo o arquivo do projeto.

Servidor de mapas para Web: aplicação cliente com o ALOV Map.

introdução. Por onde começar?. Alov Mapa. Interface do Alov mapa. Criar arquivo HTML. Definir o arquivo de configuração do projeto. Usando a opção de busca. Usando o botão de informações. Usando o botão de ligação Web. Usando o botão de seleção (SELECT). Conclusões.

Web semântica: estudo preliminar.

Web x Web semântica. Representação do conhecimento. Ontologia. Agentes inteligentes. Metadados. Arquitetura de descrição de recursos. Tipos de linguagens a para construção da Web semãntica.

SpringWeb: um aplicativo para publicar mapas na web.

Spring Web. Arquitetura dos dados. Migrando dados de outros SIGs. Baixando o aplicativo. Executando o Spring Web.