Pramod Jain

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This article describes our experiences with developing a browser-based Web conferencing application with the following constraints: HTTP protocol (port 80) to broadcast and receive video/audio Broadcasters and receivers are not required to have public IP addresses Multiple users, each capable of broadcasting to and receiving feeds from many users Low-cost solution for continuous video/audio feed Java Media Framework (JMF) is used to develop the browser-based Web conferencing application. In this architecture, the client uses two JMF applets - one for capturing video/audio from a Webcam and the other for playing video/audio feed. The capture applet continuously captures video/audio feed for a specified length of time (e.g., 10 seconds) and saves it locally in a file. This file is uploaded to a Web server using an upload servlet. The media stream is stored in MSVIDEO ... (more)

Building an Instant Messaging Application Using Jabber/XMPP

This article will describe our experiences with developing a Java-based instant messenger application using Jabber/XMPP (Extensible Messaging and Presence Protocol) - a free, open and public protocol and technology for instant messaging. According to the Jabber Software Foundation, "Under the hood, Jabber is a set of streaming XML protocols and technologies that enable any two entities on the Internet to exchange messages, presence, and other structured information in close to real-time." Google Talk uses the standard Jabber/XMPP protocol for authenticating, presence, and messag... (more)

Developing Web Portals in Jetspeed Using JSP

A Web portal is an application that aggregates multiple Web applications on a single Web page. Popular examples of portals are My Yahoo (my.yahoo.com) and My MSN (my.msn.com). These portals allow users to aggregate multiple Web applications (like Stock Quote, News, and Weather). In addition these portals allow users to personalize and customize the presentation and content of the individual Web application. This means users may do both: change the color, style, and layout of the page, and specify the content - list of stocks in a Stock Quote application and categories of news in ... (more)

Medical Image Conversion

In this article we'll discuss the conversion of image formats using Sun's Java Image I/O (ImageIO) and the NIH ImageJ APIs. The image formats of interest are DICOM, JPEG 2000, PNG, and TIFF. These formats are widely used in medical applications; however, most of the disciplines in medicine are standardizing on DICOM. A single API, ImageIO or ImageJ, supports the reading and writing of limited image formats. We'll describe the use of these two APIs to support the reading and writing of a larger number of image formats as well as the process of extracting rich metadata from DICOM f... (more)

Model-View-Controller based Plug-able Declarative Framework

A Model-View-Controller based Plug-able Declarative Framework (MVC-PDF) will be described, in which developers use the full power of ColdFusion MX (CFMX) components to create MVC applications. The declarative nature of the framework will allow the controller and the model to be specified declaratively in configuration files, versus custom coded in ColdFusion. A MVC-PDF will allow developers in a team to write no ColdFusion components; instead, these developers will code the business logic in controller and model XML configuration files. The pluggable nature of the framework will ... (more)