Serhan Dagtas

An integrated wireless sensing and mobile processing architecture for assisted living and healthcare applications

In this paper we present a wireless solution for monitoring people in need of medical assistance. The application relies on the use of cell phones and inexpensive sensors and is best suited for the elderly and home-bound people. The main functions of the proposed architecture are: (1) Ability to collect signals through a wireless sensor network using protocols like ZigBee and Bluetooth (2) Optimized analysis of data through an adaptive architecture that allows efficient processing of data (3) Real-time alerts and notification. Implementing the above features results in an efficient health-monitoring system, providing an improved medical support for people in their homes and in assisted living environments.

EXEM: Efficient XML data exchange management for mobile applications

In the past decade, the number of mobile devices has increased significantly. These devices are in turn showing more computational capabilities. It is therefore possible to envision a near future where client applications may be deployed on these devices. There are, however, constraints that hinder this deployment, especially the limited communication bandwidth and storage space available. This paper describes the Efficient XML Data Exchange Manager (EXEM) that combines context-dependent lossy and lossless compression mechanisms used to support lightweight exchange of objects in XML format between server and client applications. The lossy compression mechanism reduces the size of XML messages by using known information about the application. The lossless compression mechanism decouples data and metadata (compression dictionary) content. We illustrate the use of EXEM with a prototype implementation of the lossless compression mechanism that shows the optimization of the available resources on the server and the mobile client. These experimental results demonstrate the efficiency of the EXEM approach for XML data exchange in the context of mobile application development.

Ajax for mobility: mobileweaver ajax framework

This paper provides a brief description of a research project on using Ajax to enhance mobile Web applications for enterprise use. The project, known as MobileWeaver Ajax Framework, leverages enterprise SOA (Service Oriented Architecture) and the latest web technologies on mobile devices.

Multimodal detection of highlights for multimedia content

Abstract.We present a multimedia information analysis framework for content-based browsing of video. Specifically, we develop algorithms for the automated extraction of video highlights in sports video that are based on audio, text, and image features. The extracted annotations are used to build applications for selective browsing of sports videos. Such summarization techniques enable content-based indexing of multimedia documents for efficient storage and retrieval. In addition, in the context of the newly emerging standard MPEG-7, these methods will enable applications that use MPEG-7 descriptions. As this standard provides only the syntax for representing such descriptions and not specific algorithms for extracting them, these algorithms are of great value for establishing MPEG-7 as an accepted standard. We provide experimental results for the proposed algorithms on several hours of sports programs that prove the feasibility of efficient video access techniques in a multimedia environment.

An Integrated Lightweight Software Architecture for Mobile Business Applications

A growing number of mobile users prefer to access information and even make critical business decisions using their mobile phones. We present an integrated architecture developed at SAP Research as a platform for mobile business applications. The immediate goal is to allow mobile users to access information and services provided by the business back-end servers. The long-term goal is to develop techniques to overcome many problems mobile users face under such constraints as limited bandwidth, computational power and storage resources. The framework that we propose in this paper enables business applications connected to SAP through common mobile devices. SAP users can access business data and applications on the back- end server and execute tasks without a PC. We present components of the Lightweight Architecture (LWA) with specific components in the areas of data management, data compression, connectivity, and user interfaces.

Immersive Visualization of Cellular Structures

Bioimaging is an immensely powerful tool in biomedical research that aids the understanding of cellular structures and the molecular events in the cell. Understanding the biological functions within the cell requires an in-depth understanding of all the diverse functions of the microscopic structures and the molecular interactions between macromolecules in their natural environment. Traditionally, cell biologists have used light microscopy techniques to study topographical characterization of cell surfaces. The optical properties of a light microscope give occasion to a blurring phenomenon similar to the one with a conventional microscope with the result that images are characterized by low resolution and magnification. We address the challenging task of enhancing the image produced by a light microscope by reconstructing a stack of monoscopic images from a light microscope to produce a single image with inferential and useful information than that obtained at the best focus level. We believe such an approach will enable a wider base of microscope users to take advantage of light microscope imaging in biological research.

Mobile Solutions for Direct Store Delivery

Mobile phones are increasingly becoming a necessary platform for business applications. This “business mobilization” is driven by technology, IT policy, social trends, as well as business model evolution. DSD is a natural beneficiary of this increasing use of mobile phones as a business platform. This article provides a mobile perspective for future DSD applications and identifies the possible impact of current trends in this field. We show with several examples that multiple use cases for Mobile phone DSD exist today and complement/extend traditional use cases, especially for small to medium businesses. As mobile DSD continues to evolve and new areas such as social marketing and Mobile SOA technology advance, DSD has the potential to extend into new application areas. We foresee that increased home and office use of mobile platforms will complement traditional desktop models and play a major role in the future success of DSD applications.

Efficient 3-D Visualization of Cellular Structures through Reuse of Multi-focal 2-D Images

The inherent imaging properties of a light microscope used in visualization of cellular structures result in images characterized by low resolution and magnification. The images are obtained by using the microscope parameters (typically the focal setting), and are taken from a single point of view. We report a novel mutual information based image clearance (MIBIC) algorithm to refine a set of 2D images taken in a light microscope at different focal settings each representing a cross sectional view at the focal plane level and combining the most informative features from each level to produce a single image. The results illustrate that the MIBIC algorithm produces an image with enhanced visualization of cellular structures than that obtained by the best focus leveled image and thus offers a viable alternative to enhance images produced by a traditional light microscope. The results illustrate that our proposed layer separation method using multiple focus levels is an effective and efficient way for 3D imaging of translucent objects with a common light microscope