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We implemented a collaborative web presentation system for realizing a reactive presentation. The system consists of a personal computer (PC) for a presenter and PCs (or tablet devices) for audience members. The presenter uses the existing presentation software PowerPoint. The audience members use existing Web browsers. The system is used for working collaboratively with audience members. A presenter...
We propose a Generational Layered (GL) canvas mechanism to reduce delays of synchronization for collaborative Web applications. The delays consist of network delays and drawing delays. The network delays are well-argued topic by various researches. We focus on the drawing delays, which are a primary bottleneck of synchronization of objects on canvas. In our previous work, we have proposed a Drawing-Frequency...
An interactive presentation is intended to support lecturers that need to enhance presentation expressions and gather real-time feedback from audiences while delivering their presentations. Our objective is to improve the efficiency of bi-directional communication between a lecturer and a large audience in presentations using a real-time questionnaire that the result is displayed on a shared screen...
A keyword-based query is not sufficient for retrieving presentations. We assume that episodic memories about authoring slides and giving a presentation can be used for query because users easily recall and recognize slides associated with such memories. In this study, we present slide retrieval based on research episode networks that are a network composed of slides, episodic information and the links...
We realized a system that provides manipulations of slide objects to enable users to give a reactive presentation. The ``reactive presentation'' means a presentation that can immediately react an unexpected context change. A presenter requires applying the presentation to the unexpected context such as the state of audiences, unexpected questions and audiences' knowledge. Attention controls by animations...
Presentations are crucial components of the knowledge sharing in organizations with the purpose of facilitating organizational acquisition and invention. Current web applications enabling users to collaboratively create presentation-like web contents and locate the created contents on a web page for knowledge sharing are insufficiently supportive of types of materials for presentations and the functions...
The aim of this study is to develop a computational framework for analyzing the framing of news coverage for controversial public issues by comparing the coverage from ideologically distant news media sources. Because news media sources play a key role in the formation of public opinion, their coverage also plays a major role in the dynamics of the public debates. It can be hypothesized that the public...
In recent years, use of the social networking/micro-blogging service Twitter has spread widely. Twitter users constantly post tweets and connect with an often huge number of other users. We need to optimize viewing a lot of tweets. For users who browse infrequently, many unread tweets appear on their timeline, making it difficult to view. It is also difficult to search the timeline for past tweets...
We have been developing Web Flexible Editing (WFE), a system for Real-Time Collaborative Editing (RTCE) for existing Web pages. We propose three transformation approaches to enable several users to modify existing Web pages simultaneously on their browsers, while modified contents are reflected to other users in real-time. The three approaches (a server-side, a local proxy, and a companion server)...
We implemented a synchronization module for tablet devices to support collaborative works based on Web contents. The module enables multiple tablet devices to display web contents as one large display. In this paper, we show the implementation of the module. Pair swipe operations are adopted to determine the position of the device and the UDP is used for broadcasting synchronous messages. We show...
We are developing a collaborative web application for editing PDF documents using web browsers. Our system enables users to edit the same document in real-time. Users can share annotations on papers in real-time on web browsers. One of the advantages of our system is very high availability. Users only need to have their own web browsers. To improve the usability of our system, we need to consider...
We showed WFE, a real-time collaborative editing (RTCE) mechanism, in which a group of people can edit a web page on a web browser while members of the group share editing contents in real-time. In addition, we proposed applying WFE to a cloud computing environment, and we call the applied application WFE-S. The aim is to improve the system to have high scalability, elasticity, high responsiveness,...
We are developing WFE, a system for Real-Time Collaborative Editing (RTCE) for existing Web pages. We aim to enable several users to perform simultaneous modifications on existing Web pages in their browsers, while modified contents are reflected to other users in real-time. In this paper, we present the application of WFE to a cloud computing environment as well as its advantages. The environment...
We propose a differential synchronization mechanism for Real-Time Collaborative Editing. We are developing WFE, a system for Real-Time Collaborative Editing for existing Web pages. We need to improve the response time to reduce conflicts among multiple users. We develop a DOM tree based differential updating mechanism to minimize update information for real-time editing. We implement the method on...
Importance of concern assessment has been increased in Japanese regional communities. We have developed an e-Participation web platform based on a Linked Open Data set called SOCIA (Social Opinions and Concerns for Ideal Argumentation). To sophisticate text mining technologies for supporting concern assessment, building a corpus of public concerns is an urgent task. There are two issues to utilize...
We introduce an exploratory event mining system in social media. A system deals with user's interests by making use of interaction between user input and system output. The system presents related events in the form of graph structures called ``event graphs''. Event graphs based on users' interests are produced by iterating over event presentation and user selection. The system's user interface helps...
In this paper, we present an e-Participation Web system for various platforms and mobile phones, based on linked open data, classification and clustering. The system aims at supporting citizen e-Participation in ongoing regional debates by gathering and openly publishing news and opinions from the Web for easy comprehension and commenting. Our study helps us define relevant evaluation criteria for...
We propose a fake web prevention system based on a push delivery system implemented with a mobile agent on the Web. Web content can be easily replicated using a crawler that automatically retrieves all contents of visited web sites. A rigger reuses content collected by crawlers without authorization. Our fake web prevention system is based on channelizing and imaging original web pages. Channelizing...
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