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	GT Research Projects

Dependable and Secure Database Systems:
Ubiquitous Access, Synchronization, Recovery and Data Security

Subhash Bhalla

A possibility of a temporary disconnection of database service exists. It is a common need to permit a participating site to lag behind and re-initialize to full recovery. It is also necessary that active transactions view a globally consistent system state for ongoing operations. We study algorithms for on-the-fly Synchronization and Recovery in Distributed Computing Environment for backup and site-initialization. The algorithms need to be non-blocking in the sense that house-keeping steps do not interfere with ordinary transactions. Similarly, many applications require that user data is protected from accidents.

Projects in Progress

Publication

Storage Grids:
Synchronization and Recovery in Grid Computing Environment
Enrique Lopez de Lara Gutierrez

A new technology for study and research is storage grids. Most large companies, SUN, Microsoft, HP are doing active research on data and information grids. "The idea behind the storage grid is to federate a lot of granular storage systems and have them replicate data amongst themselves so that you never have an exposure. Then one can add intelligence into the grid to control that replication. A lot of research will develop over the next two to three years." HP and NetApp are working on storage grid offerings.

Using a High Level Web Interface for Database Query Languages
Masaki Hasegawa

Most users of a database system use database query languages, such as SQL. Many other users use the web interface through a web browzer. To help such uses, a query language interface (for easy access through the web) is to be made.

Intelligent Translation using Dictionary Data:
Recognition of Dictionary Words and Characters using the visible features
Subhash Bhalla

Many users use hand held devices and web access to refer to dictionary data. This study considers, Recognition of Dictionary Words and Characters using the visible features. The number of words and characters in a classical japanese dictionary are very very large. This creates difficulties at the time of input and searching. In order to find a method to recognize, Japanese Characters and words, a set of features associated with a character are stored in the form of a database. A convenient user interface is provided that can support data input for searching and selection of words and characters.

Mobile Ad-hoc Database Computing :
Tracking a Mobile Host System Using Data Dependencies
S. Bhalla

Mobile computing systems depend on the support of ground based server stations. These systems work in an envionment in which disconnections are very common. To support these systems, the ground based servers perform many computations for recovery of messages and processes.

Information Interchange Through a Web Database:
Spatial and Relational Database Systems
Masaki Hasegawa, Shapiee, Kazuya Satou, Nobuhiro Itou, Naoto Kon

To generate information on the web (dynamically ), server need to execute a script. This script program connects to a DBMS. A common gateway Interface (CGI) can be made. At present, there are many server side architectures that give better performance. In this study project, these approaches are studied for a comparision.

Web User Access to Spatial Data :
User Interface for a Geographic Information System
T. Hashimoto

Information Requirement Elicitation (IRE) is essential in wireless web service to elicit information requirements through interactive choice prompts. We present a design of a high-level user interface for IRE, in the context of banking database queries by a mobile web user. The prototype is based on the notion of Query-By-Object (QBO) approach of building a query using multiple user-level steps. The test prototype system uses J2ME MIDP for a wireless front end and a J2EE application server and an Object-Relational Database Management System (ORDBMS) at the back end. A sample set of queries demonstrate ease of access by the users. Ambiguities in users intentions are eliminated by virtue of a step-by-step procedure.

Access to Spatial Data Using Traditional Methods :
User Interface for a Geographic Information System
Y. Oshima

Many applications use geographic data, such as land management, urban planning, tourism, vehicle guidance and navigation, and e-commerce. A related research problem is to define user-friendly interfaces for Web GIS. There is a need for the definition of simple and user-friendly interfaces to allow the users to pose ad-hoc queries. Query-By-Example (QBE) is a user-friendly language developed for a RDBMS. However, many RDBMS have included support for spatial extensions in SQL. QBE has not been extended in line with these extensions. In this paper, we make an effort to create extensions for QBE to support spatial queries and thus calling it Spatial QBE.

Research Thesis Completed :

Doctor

1. Enhancing Information Requirement Ellicitation in
Geographic Data Queries for Human Computer Interfaces

Master
1. Algorithms for Online Generation of Global Database Checkpoints
2. Data Mining in Tele-communication Databases,
3. A High Level Interface for Web-GIS Supporting Dynamic Contents,
4. Materialized View Maintenance in Data Warehouse Environment,
5. Query-By-Object Interface for Web-based Information System,
6. Generating Dynamic Content at a Database Supported Web-Based Information System
7. Simple Query Interface for Dynamic Queries on the Web
8. Accessing Database Contents Through a Web Based Agent
9. A Query Language Interface for Geographic Information Systems
10. A Query by Example (QBE) Interface for Geographic Information Systems
11. Dynamic Load Balancing for Streaming Servers
12. Enabling Personalized Recommendation on the Web for Book Utilization

Proposed Graduation Theses Topics:
Intelligent Storage Management Grids to Control Replication:
- This project studies a Storage Grid Management System. A replicated database system will be crated to simulate and test user activity (related reference GBorg project by PostgreSQL) .
- High speed backup and database copy algorithms for use in embedded computing applications will be developed.
- Transaction Management in High-Performance applications will be studied with the help of simulations and modelling.
Inteligent Search for a Dictionary Database (see also Jim Breen databases)
- Common electronic dictionaries provide slow and simple search for helping users. The project aims to make an open source system to help users in study of Japanese-English-Sanskrit Languages for study of old literature and for study of Buddhism.
  (see also Hand Held database Application)
  (see also dictionary database Developer site)
  (see also Mobile Computing Equipment site)
A Web User Level Query Interface for Database Access
- Most users of a database system use database query languages, such as SQL. Many other users use the web interface through a web browzer. To help such uses, a query language interface (for easy access through the web) is to be made.
  (see a sample Application)
Data Management in Wireless Mesh Networking:
Tracking a Mobile Host System Using Data Dependencies
- Data management in wireless mesh networks (WMN) is a new technology. It will play an important role in the future generation wireless mobile networks. Standard organizations are developing specifications for mesh networking, e.g. IEEE 802.11, IEEE 802.15, IEEE 802.16 and IEEE 802.20. WMN includes dynamic self-organization, self-configuration and self-healing to enable flexible integration, quick deployment, easy maintenance, low cost, high scalability and reliable services, and also to enhance the network capacity, connectivity and throughput in multi-hop adhoc networks, wireless personal area networks (PAN), wireless local area networks (LAN), wireless metropolitan area networks (MAN) and wireless wide area networks (WAN). The project will study data management aspects in case of mobile ad hoc networks.
Information Interchange Through SOA:
Implementing Web Services
- A distributed computing system will be developed for creating a Service Oriented Architecture to support business applications. A web service interface to test a client application will be developed.
Web Based Interface for a Geographic Information System (GIS)
- The project uses map data to create a GIS application using a Web Interface. To generate information on the web (dynamically ), server need to execute a script. This script program connects to a DBMS. A common gateway Interface (CGI) can be made. At present, there are many server side architectures that give better performance. In this study project, these approaches are studied for a comparision.
  (see a sample Application)
Others

Regular meetings, reports, presentations,initiative and team spirit

Knowledge required: Knowledge of algorithms, programming, C, C++ or Java

Dependable and Secure Database Systems: Ubiquitous Access, Synchronization, Recovery and Data Security

Projects in Progress

Storage Grids: Synchronization and Recovery in Grid Computing Environment

Using a High Level Web Interface for Database Query Languages

Intelligent Translation using Dictionary Data: Recognition of Dictionary Words and Characters using the visible features

Mobile Ad-hoc Database Computing : Tracking a Mobile Host System Using Data Dependencies

Information Interchange Through a Web Database: Spatial and Relational Database Systems

Web User Access to Spatial Data : User Interface for a Geographic Information System

Access to Spatial Data Using Traditional Methods : User Interface for a Geographic Information System

Research Thesis Completed :

Proposed Graduation Theses Topics:

Others

Dependable and Secure Database Systems:
Ubiquitous Access, Synchronization, Recovery and Data Security

Storage Grids:
Synchronization and Recovery in Grid Computing Environment

Intelligent Translation using Dictionary Data:
Recognition of Dictionary Words and Characters using the visible features

Mobile Ad-hoc Database Computing :
Tracking a Mobile Host System Using Data Dependencies

Information Interchange Through a Web Database:
Spatial and Relational Database Systems

Web User Access to Spatial Data :
User Interface for a Geographic Information System

Access to Spatial Data Using Traditional Methods :
User Interface for a Geographic Information System