1 Privacy-Preserving Event Detection in Pervasive Spaces (2009)
Bijit Hore, Jehan Wickramasuriya, Sharad Mehrotra, Nalini Venkatasubramanian, Daniel Massaguer
Abstract — In this paper, we consider privacy challenges in event-driven pervasive spaces where multimedia streams captured by sensors embedded in the infrastructure are used to detect a variety of...
Toward Managing Uncertain Spatial Information for Situational Awareness Applications (2009)
Yiming Ma, Dmitri V. Kalashnikov, Sharad Mehrotra
Abstract—Situational awareness (SA) applications monitor the real world and the entities therein to support tasks such as rapid decision making, reasoning, and analysis. Raw input about unfolding...
A Semantic Framework for Reconfiguration of Instrumented Cyber Physical Spaces (2009)
Minyoung Kim, Daniel Massaguer, Nikil Dutt, Sharad Mehrotra, Shangping Ren, Mark-oliver Stehr, ...
With recent advances in embedded computing, networking, and related information technologies, it is now feasible to deploy a variety of sensing devices, communication networks and IT services in the...
Subscription Subsumption Evaluation for Content-Based Publish/Subscribe Systems (2009)
Hojjat Jafarpour, Bijit Hore, Sharad Mehrotra, Nalini Venkatasubramanian
Abstract. In this paper we address the problem of subsumption checking for subscriptions in pub/sub systems. We develop a novel approach based on negative space representation for subsumption...
Towards Breaking the Quality Curse. A Web-Querying Approach to Web People Search. ∗ (2009)
Dmitri V. Kalashnikov, Rabia Nuray-turan, Sharad Mehrotra
Searching for people on the Web is one of the most common query types to the web search engines today. However, when a person name is queried, the returned webpages often contain documents related to...
Discovering GIS Sources on the Web using Summaries (2009)
Ramaswamy Hariharan, Bijit Hore, Sharad Mehrotra
In this paper, we consider the problem of discovering GIS data sources on the web. Source discovery queries for GIS data are specified using keywords and a region of interest. A source is considered...
Incorporating Integrity Constraints in Uncertain Databases (2009)
Ashish, Naveen, Mehrotra, Sharad, Pirzadeh, Pouria
We develop an approach to incorporate additional knowledge, in the form of general purpose integrity constraints (ICs), to reduce uncertainty in probabilistic databases. While incorporating ICs...
An Event Based Approach To Situational Representation (2009)
Ashish, Naveen, Kalashnikov, Dmitri, Mehrotra, Sharad, Venkatasubramanian, Nalini
Many application domains require representing interrelated real-world activities and/or evolving physical phenomena. In the crisis response domain, for instance, one may be interested in representing...
Sharad Mehrotra, Henry F. Korth, Avi Silberschatz
Abstract. Over the past decade, signi cant research has been done towards developing transaction management algorithms for multidatabase systems. Most of this work assumes a monolithic architecture...
Middleware Support for Protecting Personal Data from Web Based Data Services (2009)
Ravi Ch, Ra Jammalamadaka, Sharad Mehrotra, Kent E. Seamons, Nalini Venkatasubramanian
Web based data services are very popular with the average computer user. Examples of such services include Gmail.com, Yahoo Photos, Yahoo Briefcase and Amazon S3 Service. In such services, the user...
Supporting Approximate Similarity Queries with Quality Guarantees in P2P Systems (2008)
Qi Zhong, Iosif Lazaridis, Mayur Deshp, Chen Li, Sharad Mehrotra, Hal Stern
In this paper we study how to support similarity queries in peer-to-peer (P2P) systems. Such queries ask for the most relevant objects in a P2P network, where the relevance is based on a predefined...
Sharad Mehrotra, Christos Faloutsos, Uci C. Faloutsos, Dr. Deepayan Chakrabarti
• Static & dynamic laws; generators
Discovering GIS Sources on the Web using Summaries (2008)
Ramaswamy Hariharan, Bijit Hore, Sharad Mehrotra
Abstract. In this paper, we consider the problem of discovering GIS data sources on the web. Source discovery queries for GIS data are specified using keywords and a region of interest. A source is...
Processing Spatial-Keyword (SK) Queries in Geographic Information Retrieval (GIR) Systems (2008)
Ramaswamy Hariharan, Bijit Hore, Chen Li, Sharad Mehrotra
Location-based information contained in publicly available GIS databases is invaluable for many applications such as disaster response, national infrastructure protection, crime analysis, and...
Integrating Similarity Retrieval and Skyline Exploration via Relevance Feedback (2008)
Abstract. Similarity retrieval have been widely used in many practical search applications. A similarity query model can be viewed as a logical combination of a set of similarity predicates. A user...
Privacy-Preserving Event Detection in Pervasive Spaces (2008)
Bijit Hore, Jehan Wickramasuriya, Sharad Mehrotra, Nalini Venkatasubramanian
Pervasive applications often require gathering information about individuals that may be considered sensitive. Often, one is forced to make a difficult choice: either to risk loss of privacy or to...
Querying �Ö��ÑÑ�Ð��×��Ö����×�Ù����Ù Encrypted XML Documents (2008)
Ravi Ch, Ra Jammalamadaka, Sharad Mehrotra
This paper proposes techniques to query encrypted XML documents. Such a problem predominantly occurs in “Database as a Service ” (DAS) architectures, where a client may outsource data to a...
CAREER: Multimedia Analysis and Retrieval System (MARS) (2008)
dimensionality curse, query processing.
Towards Reliable Application Data Broadcast in Wireless Ad Hoc Networks (2008)
Bo Xing, Mayur Deshp, Nalini Venkatasubramanian, Sharad Mehrotra
Abstract — Application data broadcast in ad hoc networks is an important primitive that has received little systematic research – the main focus of prior research being on control data broadcast....
Ravi Ch, Ra Jammalamadaka, Roberto Gamboni, Sharad Mehrotra, Kent E. Seamons, Nalini Venkatasubramanian
In this demonstration, we present the design and features of iDataGuard. iDataGuard is an interoperable security middleware that allows users to outsource their file systems to heterogeneous data...
Abstract Supporting Similarity Queries in MARS (2008)
Michael Ortega, Yong Rui, Kaushik Chakrabarti, Sharad Mehrotra, Thomas S. Huang
To address the emerging needs of applications that require access to and retrieval of multimedia objects, we are developing the Multimedia Analysis and Retrieval System (MARS) in our group at the...
On-Demand Information Portals for Disaster Situations (2008)
Yiming Ma, Dmitri V. Kalashnikov, Ram Hariharan, Sharad Mehrotra, Nalini Venkatasubramanian, Naveen Ashish, ...
Abstract-This paper describes our work on developing tech- PersonalifedDataVilsuaiatafin nology for rapidly assembling information portals that provide integrated access to and analysis of...
Architecture for an Automatic Customized Warning System (2008)
Mirko Montanari, Sharad Mehrotra, Nalini Venkatasubramanian
Abstract—Public communication during natural and manmade disasters is a key issue that must be addressed to protect lives and properties. The choice of the best protective actions to take depends...
Jitendra Kothari, Sharad Mehrotra
The World-Wide Web (WWW) is an extremely effective mechanism for sharing information throughout the world via a web of links. These links allow anyone with a connection to the Internet to unearth...
Design and Implementation of a Middleware for Sentient Spaces (2008)
Bijit Hore, Hojjat Jafarpour, Ramesh Jain, Shengyue Ji, Daniel Massaguer, Sharad Mehrotra, ...
Abstract — Surveillance is an important task for guaranteeing the security of individuals. Being able to intelligently monitor the activity in given spaces is essential to achieve such...
Exploiting Semantics for Sensor Re-Calibration in Event Detection Systems[long] (2008)
Ronen Vaisenberg, Shengyue Ji, Bijit Hore, Sharad Mehrotra, Nalini Venkatasubramanian
Event detection from a video stream is becoming an important and challenging task in surveillance and sentient systems. While computer vision has been extensively studied to solve different kinds of...
gVault: A Gmail Based Cryptographic Network File System (2008)
Ravi Ch, Ra Jammalamadaka, Roberto Gamboni, Sharad Mehrotra
Abstract. In this paper, we present the design of gVault, a cryptographic network file system that utilizes the data storage provided by Gmail’s web-based email service. Such a file system...
Urbana-Champaign Abstract (2008)
Kaushik Chakrabarti, Sharad Mehrotra
With the emergence of applications that require content-based similarity retrieval, techniques to support such a retrieval paradigm over database systems have emerged as a critical area of research....
Database Management Issues in Sensor-Enabled Distributed Environments (2008)
With the advances in embedded processors, low cost sensor technologies, and wireless communication (e.g., cellular and bluetooth technologies), smart devices that generate unprecedented amounts of...
CAREER: Multimedia Analysis and Retrieval System (MARS) (2008)
dimensionality curse, query processing.
CAREER: Multimedia Analysis and Retrieval System (MARS) (2008)
dimensionality curse, query processing.
Pvault: A Client Server System Providing Mobile Access to Personal Data (2008)
Ravi Ch, Ra Jammalamadaka, Sharad Mehrotra, Nalini Venkatasubramanian
In this paper we describe the design for the Pvault software, which is a personal data manager that stores and retrieves data from a remote untrusted data server securely. The major advantage of...
Heuristics for Flash-Dissemination in Heterogenous Networks (2008)
Mayur Deshp, Nalini Venkatasubramanian, Sharad Mehrotra
Flash Dissemination is a particularly useful form of data broadcast that arises in many mission-critical appli-cations. The goal is rapid distribution of medium amounts of data in as short a time...
Yong Rui, Thomas S. Huang, Michael Ortega, Sharad Mehrotra
Abstract | Content-Based Image Retrieval (CBIR) has become one of the most active research areas in the past few years. Many visual feature representations have been explored and many systems built....
Supporting Approximate Similarity Queries with Quality Guarantees in P2P Systems (2008)
Qi Zhong, Iosif Lazaridis, Mayur Deshp, Chen Li, Sharad Mehrotra, Hal Stern
In this paper we study how to support similarity queries in peer-to-peer (P2P) systems. Such queries ask for the most relevant objects in a P2P network, where the relevance is based on a predefined...
Kaushik Chakrabarti, Michael Ortega, Kriengkrai Porkaew, Sharad Mehrotra, Leejay Wu, Christos Faloutsos, ...
The Bulletin of the Technical Committee on Data Engineering is published quarterly and is distributed to all TC members. Its scope includes the design, implementation, modelling, theory and...
Efficient Record Linkage in Large Data Sets Paper: 113 (2008)
Liang Jin, Chen Li, Sharad Mehrotra
This paper describes an efficient approach to record linkage. Given two lists of records, the record-linkage problem consists of determining all pairs that are similar to each other, where the...
Dmitri V. Kalashnikov, Sharad Mehrotra, Zhaoqi Chen
relationships for domain-independent data cleaning ∗†
Database Support for Situational Awareness (2008)
Iosif Lazaridis, Sharad Mehrotra, Kriengkrai Porkaew
Abstract. Providing database support for interactive 3D Visualization and Situational Awareness (SA) is one of the keys to making such systems scale to the complexity of real-world scenarios. It is...
Supporting Approximate Similarity Queries with Quality Guarantees in P2P Systems (2008)
Qi Zhong, Iosif Lazaridis, Mayur Deshp, Chen Li, Sharad Mehrotra, Hal Stern
In this paper we study how to support similarity queries in peer-to-peer (P2P) systems. Such queries ask for the most relevant objects in a P2P network, where the relevance is based on a predefined...
Dmitri V. Kalashnikov, Sharad Mehrotra
Exploiting relationships for domain-independent data cleaning. SIAM SDM 2005 (ext. ver.)
by the U. S. Army Research Laboratory under Cooperative Agreement DAAL01-96-2-0003 (2008)
Iosif Lazaridis, Sharad Mehrotra
Spatial aggregate queries involve specifying a region of space and asking for the value of some aggregate function of a quantity for which we have measurements for this given region. An example of...
On-Demand Information Portals for Disaster Situations (2008)
Yiming Ma, Dmitri V. Kalashnikov, Ram Hariharan, Sharad Mehrotra, Nalini Venkatasubramanian, Naveen Ashish, ...
Abstract—This paper describes our work on developing technology for rapidly assembling information portals that provide integrated access to and analysis of information from multiple sources in the...
Situational Awareness Technologies for Disaster Response (2008)
Naveen Ashish, Dmitri Kalashnikov, Sharad Mehrotra, Ron Eguchi, Rajesh Hegde, Padhraic Smyth
Responding to natural or man-made disasters, in a timely and effective manner, can reduce deaths and injuries, contain or prevent secondary disasters, and reduce the resulting economic losses and...
Zhaoqi Chen, Dmitri V. Kalashnikov, Sharad Mehrotra
Entity resolution is a very common Information Quality (IQ) problem with many different applications. In digital libraries, it is related to problems of citation matching and author name...
Supporting Efficient Record Linkage for Large Data Sets Using Mapping Techniques ∗ (2008)
Chen Li, Liang Jin, Sharad Mehrotra
This paper describes an efficient approach to record linkage. Given two lists of records, the recordlinkage problem consists of determining all pairs that are similar to each other, where the overall...
Fault-Tolerant Queries over Sensor Data (2008)
Iosif Lazaridis, Qi Han, Sharad Mehrotra, Nalini Venkatasubramanian
We consider the problem of evaluating continuous selection queries over sensor-generated values in the presence of faults. Small sensors are fragile, have finite energy and memory, and communicate...
Kaushik Chakrabarti, Kriengkrai Porkaew, Sharad Mehrotra
In many applications, users specify target values for certain attributes/features without requiring exact matches to these values in return. Instead, the result is typically a ranked list of...
Kaushik Chakrabarti, Kriengkrai Porkaew, Michael Ortega, Sharad Mehrotra
In many applications, users specify target values for certain attributes/features without requiring exact matches to these values in return. Instead, the result is typically a ranked list of “top k...
Kaushik Chakrabarti, Sharad Mehrotra
Feature based similarity search is emerging as an important search paradigm in database systems. The technique used is to map the data items as points into a high dimensional feature space which is...
Supporting Ranked Boolean Similarity Queries in MARS (2007)
Sharad Mehrotra, Thomas S. Huang
Abstract---To address the emerging needs of applications that require access to and retrieval of multimedia objects, we are developing the Multimedia Analysis and Retrieval System (MARS) [29]. In...
VLDB Submission Number 200 Refining Top-k Selection Queries based on User Feedback (2007)
Kaushik Chakrabarti, Kriengkrai Porkaew, Sharad Mehrotra
In many applications, users specify target values for certain attributes/features, without requiring exact matches to these values in return. Instead, the result is typically a ranked list of...
An Architecture for Large Multidatabase Systems (2007)
Sharad Mehrotra, Henry F. Korth, Avi Silberschatz
Over the past decade, substantial research has been done towards developing transaction management algorithms for multidatabase systems. Most of these research efforts have concentrated on the...
Applying Semantic Association To Support Content-Based Video Retrieval (2007)
Yueting Zhuangy, Yong Rui, Thomas S. Huang, Sharad Mehrotra
The traditional approach to video retrieval is to first annotate the video by textual information (titles and key words) and then the queries will be searched based on this keyword set. Since...
Eamonn Keogh, Kaushik Chakrabarti, Michael Pazzani, Sharad Mehrotra
Abstract. The problem of similarity search in large time series databases has attracted much attention recently. It is a non-trivial problem because of the inherent high dimensionality of the data....
E#cient Record Linkage in Large Data Sets Paper: 113 (2007)
Liang Jin, Chen Li, Sharad Mehrotra
This paper describes an e#cient approach to record linkage. Given two lists of records, the record-linkage problem consists of determining all pairs that are similar to each other, where the overall...
Database Support for Multimedia Applications (2007)
Michael Ortega-binderberger, Kaushik Chakrabarti, Sharad Mehrotra
Advances in high performance computing, communication, and storage technologies, as well as emerging large-scale multimedia applications, have made the design and development of multimedia...
An Approach to Integrating Query Renement in SQL (2007)
Michael Ortega-binderberger, Kaushik Chakrabarti, Sharad Mehrotra
With the emergence of applications that require content-based similarity retrieval, techniques to support such a retrieval paradigm over database systems have emerged as a critical area of research....
An Approach to Integrating Query Renement in SQL (2007)
Michael Ortega-binderberger, Kaushik Chakrabarti, Sharad Mehrotra
Abstract. With the emergence of applications that require contentbased similarity retrieval, techniques to support such a retrieval paradigm over database systems have emerged as a critical area of...
Automatic Circuit Characterization Computer Experiments (2007)
Sharad Mehrotra, Paul Franzon, Slobodan Simovich, Michael Steer
In order to design high performance circuits, the relationship between circuit perfor-mance and design parameters must be precisely established. Previously, experimental design techniques have been...
Global Optimization Approach to Transistor Sizing for (2007)
Sharad Mehrotra, Paul Franzon, Wentai Liu A
A stochastic global optimization approach is presented for skew minimization in CMOS VLSI circuits. This is a direct search strategy for the best design among feasible ones, with the designer...
Paul Franzon, Slobodan Simovich, Sharad Mehrotra, Michael Steer, Tom Mills
This paper discusses the construction and application of two tools. The first tool, Meta$im, allows multiple simulation studies to be automatically specified, conducted, and analyzed in such a...
Executing SQL over Encrypted Data in the Database-Service-Provider Model (2007)
Bala Iyer, Chen Li, Sharad Mehrotra
Rapid advances in networking and Internet technologies have fueled the emergence of the \software as a service " model for enterprise computing. Successful examples of commercially viable...
Kriengkrai Porkaew, Iosif Lazaridis, Sharad Mehrotra
Abstract. In dynamic spatio-temporal environments where objects may continuously move in space, maintaining consistent information about the location of objects and processing motion-specific queries...
Announcements and Notices (2007)
Kaushik Chakrabarti, Michael Ortega, Kriengkrai Porkaew, Sharad Mehrotra, Leejay Wu, Christos Faloutsos, ...
TCDE Election Notice and Position Statement.................................................... 50 TCDE Election Ballot.................................................................... back cover...
Kaushik Chakrabarti, Kriengkrai Porkaew, Sharad Mehrotra
In many applications, users specify target values for certain attributes/features without requiring exact matches to these values in return. Instead, the result is typically a ranked list of the top...
1 Locally Adaptive Dimensionality Reduction for Indexing Large Time Series Databases (2007)
Eamonn Keogh, Kaushik Chakrabarti, Sharad Mehrotra, Michael Pazzani
Similarity search in large time series databases has attracted much research interest recently. It is a difficult problem because of the typically high dimensionality of the data.. The most promising...
Disambiguation algorithm for people search on the web. ICDE, to appear (2007)
Dmitri V. Kalashnikov, Sharad Mehrotra, Zhaoqi Chen, Rabia Nuray-turan, Naveen Ashish
Searching for entities, i.e., webpages related to a person, location, organization or other types of entities is a common activity in internet search today. For instance “people search ” i.e.,...
Bijit Hore, Ravi Ch, Ra Jammalamadaka, Sharad Mehrotra
k-anonymity is a popular measure of privacy for data publishing: It measures the risk of identity-disclosure of individuals whose personal information are released in the form of published data for...
Self-tuning in graph-based reference disambiguation (2007)
Rabia Nuray-turan, Dmitri V. Kalashnikov, Sharad Mehrotra
Abstract. Nowadays many data mining/analysis applications use the graph analysis techniques for decision making. Many of these techniques are based on the importance of relationships among the...
Providing Data Sharing As a Service (2007)
Ravi Ch, Ra Jammalamadaka, Roberto Gamboni, Sharad Mehrotra
This paper presents DataVault, an architecture designed for Web users that allows them to securely access their data from any machine connected to the Internet and also lets them selectively share...
Bijit Hore, Ravi Ch, Ra Jammalamadaka, Sharad Mehrotra
k-anonymity is a popular measure of privacy for data publishing: It measures the risk of identity-disclosure of individuals whose personal information are released in the form of published data for...
Disambiguation algorithm for people search on the web. ICDE, to appear (2007)
Dmitri V. Kalashnikov, Sharad Mehrotra, Zhaoqi Chen, Rabia Nuray-turan, Naveen Ashish
Searching for entities, i.e., webpages related to a person, location, organization or other types of entities is a common activity in internet search today. For instance “people search ” i.e.,...
Self-tuning in graph-based reference disambiguation (2007)
Rabia Nuray-turan, Dmitri V. Kalashnikov, Sharad Mehrotra
Abstract. Nowadays many data mining/analysis applications use the graph analysis techniques for decision making. Many of these techniques are based on the importance of relationships among the...
Bijit Hore, Ravi Ch, Ra Jammalamadaka, Sharad Mehrotra
k-anonymity is a popular measure of privacy for data publishing: It measures the risk of identity disclosure for individuals whose personal information is released in some table along with other...
Bijit Hore, Ravi Ch, Ra Jammalamadaka, Sharad Mehrotra
k-anonymity is a popular measure of privacy for data publishing: It measures the risk of identity-disclosure of individuals whose personal information are released in the form of published data for...
Privacypreserving event detection for pervasive spaces (2007)
Bijit Hore, Jehan Wickramasuriya, Sharad Mehrotra, Nalini Venkatasubramanian, Daniel Massaguer
Abstract—In this paper, we consider privacy challenges in eventdriven pervasive spaces where multimedia streams captured by sensors embedded in the infrastructure are used to detect a variety of...
Design and implementation of a middleware for sentient spaces (2007)
Bijit Hore, Hojjat Jafarpour, Ramesh Jain, Shengyue Ji, Daniel Massaguer, Sharad Mehrotra, ...
Abstract- Surveillance is an important task for guaranteeing from the underlying sensors provides numerous advantages. the security of individuals. Being able to intelligently monitor First and...
Multi-agent simulation of disaster response (2006)
Daniel Massaguer, Vidhya Balasubramanian, Sharad Mehrotra, Nalini Venkatasubramanian
Information Technology has the potential of improving the quality and the amount of information humans receive during emergency response. Testing this technology in realistic and flexible...
Drillsim: A simulation framework for emergency response drills (2006)
Vidhya Balasubramanian, Daniel Massaguer, Sharad Mehrotra
Abstract. Responding to natural or man-made disasters in a timely and effective manner can reduce deaths and injuries, contain or prevent secondary disasters, and reduce the resulting economic losses...
SAT: Spatial Awareness from Textual input (2006)
Dmitri V. Kalashnikov, Yiming Ma, Sharad Mehrotra, Ramaswamy Hariharan, Nalini Venkatasubramanian, Naveen Ashish
bombings) have illustrated the need for accurate and timely situational awareness tools in emergency response. Developing effective situational awareness (SA) systems has the potential to radically...
A gossip-based flash-dissemination system (2006)
Mayur Deshp, Bo Xing, Iosif Lazardis, Bijit Hore, Nalini Venkatasubramanian, Sharad Mehrotra
In this paper, we explore a new form of dissemination that arises in distributed, mission-critical applications called Flash Dissemination. This involves the rapid dissemination of rich information...
Index for fast retrieval of uncertain spatial point data (2006)
Dmitri V. Kalashnikov, Yiming Ma, Sharad Mehrotra, Ramaswamy Hariharan
Index for fast retrieval of uncertain spatial point data (2006)
Dmitri V. Kalashnikov, Yiming Ma, Sharad Mehrotra, Ramaswamy Hariharan
Domain-independent data cleaning via analysis of entity-relationship graph (2006)
Entity-relationship Graph, Dmitri V. Kalashnikov, Sharad Mehrotra
In this paper, we address the problem of reference disambiguation. Specifically, we consider a situation where entities in the database are referred to using descriptions (e.g., a set of instantiated...
Modeling and querying uncertain spatial information for situational awareness applications (2006)
Dmitri V. Kalashnikov, Yiming Ma, Sharad Mehrotra, Ramaswamy Hariharan, Carter Butts
Situational awareness (SA) applications monitor the real world and the entities therein to support tasks such as rapid decision-making, reasoning, and analysis. Raw input about unfolding events may...
Modeling and querying uncertain spatial information for situational awareness applications (2006)
Dmitri V. Kalashnikov, Yiming Ma, Sharad Mehrotra, Ramaswamy Hariharan, Carter Butts
Situational awareness (SA) applications monitor the real world and the entities therein to support tasks such as rapid decision-making, reasoning, and analysis. Raw input about unfolding events may...
SAT: Spatial Awareness from Textual input (2006)
Dmitri V. Kalashnikov, Yiming Ma, Sharad Mehrotra, Ramaswamy Hariharan, Nalini Venkatasubramanian, Naveen Ashish
bombings) have illustrated the need for accurate and timely situational awareness tools in emergency response. Developing effective situational awareness (SA) systems has the potential to radically...
N.: Synthetic humans in emergency response drills (2006)
Daniel Massaguer, Vidhya Balasubramanian, Sharad Mehrotra, Nalini Venkatasubramanian
Being able to realistically simulate humans in emergency response activities is a key challenge for advancing the field of information technology for emergency response. Building good human models...
Delegate: A Proxy Based Architecture for Secure Website Access from an Untrusted Machine (2006)
Ravi Ch, Ra Jammalamadaka, Sharad Mehrotra
Performing sensitive online transactions using computers found in cybercafés and public libraries is risky. The untrusted nature of these machines creates a target rich environment. A simple...
Domainindependent data cleaning via analysis of entityrelationship graph (2006)
Dmitri V. Kalashnikov, Sharad Mehrotra
In this article, we address the problem of reference disambiguation. Specifically, we consider a situation where entities in the database are referred to using descriptions (e.g., a set of...
Quality-Driven Approximate Methods for Integrating GIS Data (2005)
Ramaswamy Hariharan, Michal Shmueli-scheuer, Chen Li, Sharad Mehrotra
GIS data distributed in local, state, federal, and private data clearinghouses are being made accessible through the efforts of organizations such as Federal Geographic Data Committee (FGDC) and...
Quality-Driven Approximate Methods for Integrating GIS Data (2005)
Ramaswamy Hariharan, Michal Shmueli-scheuer, Chen Li, Sharad Mehrotra
GIS data distributed in local, state, federal, and private data clearinghouses are being made accessible through the efforts of organizations such as Federal Geographic Data Committee (FGDC) and...
Sensor data collection with expected reliability guarantees (2005)
Qi Han, Iosif Lazaridis, Sharad Mehrotra, Nalini Venkatasubramanian
Due to the fragility of small sensors, their finite energy supply and the loss of packets in the wireless channel, reports from sensors may not reach the sink node. In this paper we consider the...
Adaptive target tracking in sensor networks (2004)
Xingbo Yu, Koushik Niyogi, Sharad Mehrotra, Nalini Venkatasubramanian
Recent advances in processor, memory and radio technology have enabled cheap nodes capable of sensing, communication and processing. Networks of distributed microsensors are rapidly emerging as a...
Energy efficient data collection in distributed sensor environments (2004)
Qi Han, Sharad Mehrotra, Nalini Venkatasubramanian
Abstract — Sensors are typically deployed to gather data about the physical world and its artifacts for a variety of purposes that range from environment monitoring, control, to data analysis....
Evaluating refined queries in top-k retrieval systems (2004)
Kaushik Chakrabarti, Michael Ortega-binderberger, Sharad Mehrotra, Kriengkrai Porkaew
Abstract—In many applications, users specify target values for certain attributes/features without requiring exact matches to these values in return. Instead, the result is typically a ranked list...
Approximate Selection Queries over Imprecise Data (2004)
Iosif Lazaridis, Sharad Mehrotra
over imprecisely represented objects. Such objects are used either because they are much smaller in size than the precise ones (e.g., compressed versions of time series), or as imprecise replicas of...
CAMAS: A citizen awareness system for crisis mitigation (2004)
Sharad Mehrotra, Carter Butts, Dmitri V. Kalashnikov, Nalini Venkatasubramanian, Kemal Altintas, Haimin Lee, ...
Responding to natural or man-made disasters in a timely and effective manner can reduce deaths and injuries, contain or prevent secondary disasters, and reduce the resulting economic losses and...
A framework for efficient storage security in rdbms (2004)
Bala Iyer, Sharad Mehrotra, Einar Mykletun, Gene Tsudik, Yonghua Wu
Abstract. With the widespread use of e-business coupled with the public’s awareness of data privacy issues and recent database security related legislations, incorporating security features into...
Privacy protecting data collection in media spaces (2004)
Jehan Wickramasuriya, Mahesh Datt, Sharad Mehrotra, Nalini Venkatasubramanian
Around the world as both crime and technology become more prevalent, officials find themselves relying more and more on video surveillance as a cure-all in the name of public safety. Used properly,...
Adaptive middleware for distributed sensor environments (2003)
Xingbo Yu, Koushik Niyogi, Sharad Mehrotra, Nalini Venkatasubramanian
Distributed sensor environments are emerging as a feasible solution to various data collection applications. However, energy constraints on sensor nodes, which are usually battery powered, hinder the...
Efficient Record Linkage in Large Data Sets (2003)
Liang Jin, Chen Li, Sharad Mehrotra
This paper describes an efficient approach to record linkage. Given two lists of records, the record-linkage problem consists of determining all pairs that are similar to each other, where the...
Relevance Feedback in Multimedia Databases (2003)
Michael Ortega-binderberger, Sharad Mehrotra
The popularity of web search engines has familiarized countless users with the similarity search paradigm. In this paradigm a user provides an example or simple sketch of desired information to a...
S.: Efficient evaluation of relevance feedback for multidimensional all-pairs retrieval (2003)
Michael Ortega, Kaushik Chakrabarti, Sharad Mehrotra
New retrieval applications support exible comparison for allpairs best match operations based on a notion of similarity or distance. The distance between items is determined by some arbitrary...
Capturing Sensor-Generated Time Series with Quality Guarantees (2003)
Iosif Lazaridis, Sharad Mehrotra
We are interested in capturing time series generated by small wireless electronic sensors. Battery-operated sensors must avoid heavy use of their wireless radio which is a key cause of energy...
Energy Efficient Communication for Reliability and Quality Aware Sensor Networks (2003)
Cristiano Pereira, Sumit Gupta, Koushik Niyogi, Iosif Lazaridis, Sharad Mehrotra, Rajesh Gupta
Nodes in a sensor network are typically severely constrained by the amount of power available to them. Furthermore, power consumption by the wireless radio in a sensor node is an order of magnitude...
Capturing Uncertainty in Spatial Queries over Imprecise Data (2003)
Emerging applications using miniature electronic devices (e.g., tracking mobile objects using sensors) generate very large amounts of highly dynamic data that poses very high overhead on databases...
Energy Efficient Data Collection in Distributed Sensor Environments (2003)
Qi Han Sharad, Qi Han, Sharad Mehrotra, Nalini Venkatasubramanian
Sensors are typically deployed to gather data about the physical world and its artifacts for a variety of purposes that range from environment monitoring, control, to data analysis. Since sensors are...
Efficient similarity string joins in large data sets (2002)
Liang Jin, Chen Li, Sharad Mehrotra
Many emerging database applications require very ecient mechanisms to perform similarity joins. While similarity joins have been extensively explored in the literature, the problem of similarity...
Security issues in a future vehicular network (2002)
Magda El Zarki, Sharad Mehrotra, Gene Tsudik, Nalini Venkatasubramanian
In this paper we present a novel infrastructure for vehicular communication on highways (DAHNI) and propose some potential applications aimed at assisting drivers. Certain unique features of the...
Efficient similarity string joins in large data sets (2002)
Contact Liang Jin, Liang Jin, Liang Jin, Chen Li, Chen Li, Sharad Mehrotra, ...
Many emerging database applications require very ecient mechanisms to perform similarity joins. While similarity joins have been extensively explored in the literature, the problem of similarity...
Providing Database as a Service (2002)
Hakan Hacgumus, Bala Iyer, Sharad Mehrotra
In this paper, we explore a new paradigm for data management in which a third party service provider hosts "database as a service " providing its customers seamless mechanisms to...
Dynamic Queries over Mobile Objects (2002)
Iosif Lazaridis, Kriengkrai Porkaew, Sharad Mehrotra
Abstract. Increasingly applications require the storage and retrieval of spatio-temporal information in a database management system. A type of such information is mobile objects, i.e., objects whose...
Locally adaptive dimensionality reduction for indexing large time series databases (2001)
Kaushik Chakrabarti, Eamonn Keogh, Sharad Mehrotra, Michael Pazzani
Similarity search in large time series databases has attracted much research interest recently. It is a difficult problem because of the typically high dimensionality of the data.. The most promising...
Situational Awareness over Large Spatio-Temporal Databases", Workshop at the (2001)
Sharad Mehrotra, Iosif Lazaridis, Kriengkrai Porkaew
Abstract. Providing database support for interactive 3D Visualization and Situational Awareness (SA) is one of the keys to making such systems scale to the complexity of real-world scenarios. It is...
Locally adaptive dimensionality reduction for indexing large time series databases (2001)
Eamonn Keogh, Kaushik Chakrabarti, Sharad Mehrotra, Michael Pazzani
Similarity search in large time series databases has attracted much research interest recently. It is a difficult problem because of the typically high dimensionality of the data.. The most promising...
Local dimensionality reduction: a new approach to indexing high dimensional spaces (2000)
Kaushik Chakrabarti, Sharad Mehrotra
Many emerging application domains require database systems to support efficient access over highly multidimensional datasets. The current state-of-the-art technique to indexing high dimensional data...
Efficient Query Refinement in Multimedia Databases (2000)
Kaushik Chakrabarti, Kriengkrai Porkaew, Sharad Mehrotra
Increasing application demands are pushing database management systems (DBMSs) towards providing adequate and efficient support for content-based retrieval over multimedia objects (e.g., images,...
Efficient Query Refinement in Multimedia Databases (2000)
Kaushik Chakrabarti, Kriengkrai Porkaew, Sharad Mehrotra
Increasing application demands are pushing database management systems (DBMSs) towards providing adequate and efficient support for content-based retrieval over multimedia objects (e.g., images,...
Local Dimensionality Reduction: A New Approach to Indexing High Dimensional Spaces (2000)
Kaushik Chakrabarti, Sharad Mehrotra
Many emerging application domains require database systems to support efficient access over highly multidimensional datasets. The current state-of-the-art technique to indexing high dimensional data...
Local Dimensionality Reduction: A New Approach to Indexing High Dimensional Spaces (2000)
Kaushik Chakrabarti, Sharad Mehrotra
Many emerging application domains require database systems to support efficient access over highly multidimensional datasets. The current state-of-the-art technique to indexing high dimensional data...
Dimensionality Reduction for Fast Similarity Search in Large Time Series Databases (2000)
Eamonn Keogh Kaushik, Kaushik Chakrabarti, Michael Pazzani, Sharad Mehrotra
The problem of similarity search in large time series databases has attracted much attention recently. It is a non-trivial problem because of the inherent high dimensionality of the data. The most...
WebMARS: A Multimedia Search Engine (2000)
Michael Ortega-Binderberger, Sharad Mehrotra, Kaushik Chakrabarti, Kriengkrai Porkaew
The Web provides a large repository of multimedia data, text, images, etc. Most current search engines focus on textual retrieval. In this paper, we focus on using an integrated textual and visual...
WebMARS: A Multimedia Search Engine (2000)
Michael Ortega-Binderberger, Sharad Mehrotra, Kaushik Chakrabarti, Kriengkrai Porkaew
The Web provides a large repository of multimedia data, text, images, etc. Most current search engines focus on textual retrieval. In this paper, we focus on using an integrated textual and visual...
Query Refinement for Content Based Multimedia Retrieval (1999)
Kriengkrai Porkaew, Kaushik Chakrabarti, Sharad Mehrotra
During the past few years, content-based multimedia retrieval has become one of the most active areas of research. Unlike traditional database queries, content-based multimedia retrieval queries are...
Query refinement for multimedia similarity retrieval (1999)
Kriengkrai Porkaew, Kaushik Chakrabarti, Sharad Mehrotra
Advances in image processing, database management, and information retrieval has resulted in content-based multimedia retrieval to emerge as an important area of
Efficient concurrency control in multidimensional access methods (1999)
Kaushik Chakrabarti, Sharad Mehrotra
The importance of multidimensional index structures to numerous emerging database applications is well established. However, before these index structures can be supported as access methods (AMs) in...
Similar shape retrieval in mars (1999)
Kaushik Chakrabarti, Michael Ortega-binderberger, Kriengkrai Porkaew, Sharad Mehrotra
This paper presents a novel approach to representing 2-d shapes that adaptively models different portions of the shape at different resolutions, having higher resolution where it improves the quality...
Similarity Search Using Multiple Examples in MARS (1999)
Kriengkrai Porkaew, Sharad Mehrotra, Michael Ortega, Kaushik Chakrabarti
Unlike traditional database management systems, in multimedia databases that support content-based retrieval over multimedia objects, it is difficult for users to express their exact information need...
Similarity Search Using Multiple Examples in MARS (1999)
Kriengkrai Porkaew, Sharad Mehrotra, Michael Ortega, Kaushik Chakrabarti
Unlike traditional database management systems, in multimedia databases that support content-based retrieval over multimedia objects, it is difficult for users to express their exact information need...
A Multimedia Information Retrieval Model Based On Semantic And Visual Content (1999)
Yueting Zhuang, Sharad Mehrotra, Thomas S. Huang
Unlike text-based information retrieval model, information retrieval based on multimedia lacks a good IR model. In this paper, the goal is to present a retrieval model based on both semantic and...
A Multimedia Information Retrieval Model Based on Semantic and Visual Content (1999)
Yueting Zhuang, Sharad Mehrotra, Thomas S. Huang
Unlike text-based information retrieval model, information retrieval based on multimedia lacks a good IR model. In this paper, the goal is to present a retrieval model based on both semantic and...
High Dimensional Feature Indexing Using Hybrid Trees (1999)
Kaushik Chakrabarti, Sharad Mehrotra
Feature based similarity search is emerging as an important search paradigm in database systems. The technique used is to map the data items as points into a high dimensional feature space which is...
Similar Shape Retrieval in MARS (1999)
Kaushik Chakrabarti, Michael Ortega-Binderberger, Kriengkrai Porkaew, Peng Zuo, Sharad Mehrotra
This paper presents a novel approach to representing 2-d shapes that adaptively models different portions of the shape at different resolutions, having higher resolution where it improves the quality...
Query Reformulation for Content Based Multimedia Retrieval in MARS (1999)
Kriengkrai Porkaew, Sharad Mehrotra, Michael Ortega
Unlike traditional database management systems, in multimedia databases that support content based retrieval over multimedia objects, it is difficult for users to express their exact information need...
Similar Shape Retrieval in MARS (1999)
Kaushik Chakrabarti Michael, Michael Ortega-binderberger, Kriengkrai Porkaew, Peng Zuo, Sharad Mehrotra
This paper presents a novel approach to representing 2-d shapes that adaptively models different portions of the shape at different resolutions, having higher resolution where it improves the quality...
Query Refinement for Multimedia Similarity Retrieval in MARS (1999)
Kriengkrai Porkaew, Kaushik Chakrabarti, Sharad Mehrotra
During the past few years, content-based multimedia retrieval has become one of the most active areas of research. Unlike traditional database queries, content-based multimedia retrieval queries are...
High Dimensional Feature Indexing Using Hybrid Trees (1999)
Kaushik Chakrabarti, Sharad Mehrotra
Featurebased similarity search is emerging as an important search paradigm in database systems. The technique used is to map the data items as points into a high dimensional feature space which is...
Query Refinement for Multimedia Similarity Retrieval in MARS (1999)
Kriengkrai Porkaew, Kaushik Chakrabarti, Sharad Mehrotra
During the past few years, content-based multimedia retrieval has become one of the most active areas of research. Unlike traditional database queries, content-based multimedia retrieval queries are...
Integration of SATURN System and VGIS (1999)
Hu Yu, Sharad Mehrotra, Robert Winkler, Sean S. Ho, Timothy C. Gregory, Swati D. Allen
This paper reports on the integration of the SpAtioTemporal Uncertainty ReasoNing (SATURN) system being developed in our group with the Virtual GIS (VGIS) system in order to improve its performance...
Information Retrieval over Multimedia Documents (1999)
Michael Ortega, Kriengkrai Porkaew, Sharad Mehrotra
While there are many textual and image retrieval systems, few have explored the granularity of the retrieval unit and the use of all available information for retrieval. This paper presents our work...
Information Retrieval over Multimedia Documents (1999)
Michael Ortega, Kriengkrai Porkaew, Sharad Mehrotra
While there are many textual and image retrieval systems, few have explored the granularity of the retrieval unit and the use of all available information for retrieval. This paper presents our work...
The Hybrid Tree: An Index Structure for High Dimensional Feature Spaces (1999)
Kaushik Chakrabarti, Sharad Mehrotra
Feature based similarity search is emerging as an important search paradigm in database systems. The technique used is to map the data items as points into a high dimensional feature space which is...
Query Reformulation for Content Based Multimedia Retrieval in MARS (1999)
Kriengkrai Porkaew, Sharad Mehrotra, Michael Ortega
Unlike traditional database management systems, in content-based multimedia retrieval databases, it is difficult for users to express their exact information need directly in a precise query. A...
Information retrieval beyond the text document (1999)
Yong Rui, Michael Ortega, Thomas S. Huang, Sharad Mehrotra
With the expansion of the Internet, searching for information goes beyond the boundary of physic libraries. Millions of documents of various media types, such as text, image, video, audio, graphics,...
Ensuring consistency in multidatabase by preserving two-level serializability (1998)
Sharad Mehrotra, Rajeev Rastogi, Henry F. Korth, Abraham Silberschatz
The concept of serializability has been the traditionally accepted correctness criterion in database systems. However, in multidatabase systems (MDBSs), ensuring global serializability is a di cult...
Browsing and retrieving video content in a unified framework (1998)
Yong Rui, Thomas S. Huang, Sharad Mehrotra
Abstract- In this paper, we rst review the recent research progress in video analysis, representation, browsing, and retrieval. Motivated by the mechanism used to access book's content, we then...
Relevance Feedback: A Power Tool for Interactive Content-Based Image Retrieval (1998)
Yong Rui Thomas, Thomas S. Huang, Michael Ortega, Sharad Mehrotra
Content-Based Image Retrieval (CBIR) has become one of the most active research areas in the past few years. Many visual feature representations have been explored and many systems built. While these...
Applying Semantic Association To Support Content-Based Video Retrieval (1998)
Yueting Zhuang, Yong Rui, Thomas S. Huang, Sharad Mehrotra
The traditional approach to video retrieval is to #rst annotate the video by textual information #titles and key words# and then the queries will be searched based on this keyword set. Since...
Information Retrieval Beyond the Text Document (1998)
Yong Rui, Michael Ortega, Thomas S. Huang, Sharad Mehrotra
With the expansion of the Internet, searching for information goes beyond the boundary of physical libraries. Millions of documents of various media types, suchas text, image, video, audio, graphics,...
Efficient Concurrency Control in Multidimensional Access Methods (1998)
Kaushik Chakrabarti, Sharad Mehrotra
The importance of multidimensional index structures to numerous emerging database applications is well established. However, before these index structures can be supported as access methods (AMs) in...
Efficient Concurrency Control in Multidimensional Access Methods (1998)
Kaushik Chakrabarti, Sharad Mehrotra
The importance of multidimensional index structures to numerous emerging database applications is well established. However, before these index structures can be supported as access methods (AMs) in...
Ensuring Consistency in Multidatabases by Preserving Two-Level Serializability (1998)
Sharad Mehrotra, Rajeev Rastogi, Henry F. Korth, Abraham Silberschatz
ing with credit is permitted. To copy otherwise, to republish, to post on servers, to redistribute to lists, or to use any component of this work in other works, requires prior speci#c permission...
Relevance Feedback Techniques in Interactive Content-Based Image Retrieval (1998)
Yong Rui Thomas, Thomas S. Huang, Sharad Mehrotra
Content-Based Image Retrieval #CBIR# has become one of the most active research areas in the past few years. Many visual feature representations have been explored and many systems built. While these...
Dynamic Granular Locking Approach to Phantom Protection in R-trees (1998)
Kaushik Chakrabarti, Sharad Mehrotra
Over the last decade, the R-tree has emerged as one of the most robust multidimensional access methods. However, before the R-tree can be integrated as an access method to a commercial strength...
Adaptive Key Frame Extraction Using Unsupervised Clustering (1998)
Yueting Zhuang, Yong Rui, Thomas S. Huang, Sharad Mehrotra
Key frame extraction has been recognized as one of the important research issues in video information retrieval. Although progress has been made in key frame extraction, the existing approaches are...
Browsing and Retrieving Video Content in a Unified Framework (1998)
Yong Rui, Thomas S. Huang, Sharad Mehrotra
In this paper, we #rst review the recent research progress in video analysis, representation, browsing, and retrieval. Motivated by the mechanism used to access book's content, we then...
Relevance Feedback: A Power Tool for Interactive Content-Based Image Retrieval (1998)
Yong Rui, Thomas S. Huang, Michael Ortega, Sharad Mehrotra
Content-Based Image Retrieval #CBIR# has become one of the most active research areas in the past few years. Many visual feature representations have been explored and many systems built. While these...
Processing Uncertainty Queries In Database Management Systems (1998)
Kaushik Chakrabarti, Sharad Mehrotra, Michael Ortega, Kriengkrai Porkaew, Robert Winkler
Emerging applications, including many military applications, require explicit mechanisms to represent and process uncertainty in queries and in the data stored in databases. Most current approaches...
Failure Handling in an Optimized Two-Safe Approach to Maintaining Remote Backup Systems (1998)
Kexiang Hu Sharad, Sharad Mehrotra, Simon Kaplan
In a primary-backup system, transaction processing takes place at the primary and the log records generated are propagated to the backup which uses them to reconstruct a recent state of the database....
Dynamic Granular Locking Approach to Phantom Protection in R-trees (1998)
Kaushik Chakrabarti, Sharad Mehrotra
Over the last decade, the R-tree has emerged as one of the most robust multidimensional access methods. However, before the R-tree can be integrated as an access method to a commercial strength...
Constructing Table-of-Content for Videos (1998)
Yong Rui Thomas, Thomas S. Huang, Sharad Mehrotra
A fundamental task in video analysis is to extract structures from the video to facilitate user's access (browsing and retrieval). Motivated by the important role that Table-of-Content (ToC)...
Query Reformulation for Content Based Multimedia Retrieval in MARS (1998)
Kriengkrai Porkaew, Sharad Mehrotra, Michael Ortega
Unlike traditional database management systems, in multimedia databases that support contentbased retrieval over multimedia objects, it is difficult for users to express their exact information need...
Failure Handling in an Optimized Two-Safe Approach to Maintaining Remote Backup Systems (1998)
Kexiang Hu, Sharad Mehrotra, Simon Kaplan
In a primary-backup system, transaction processing takes place at the primary and the log records generated are propagated to the backup which uses them to reconstruct a recent state of the database....
Information Retrieval Beyond the Text Document (1998)
Yong Rui, Michael Ortega, Thomas S. Huang, Sharad Mehrotra
With the expansion of the Internet, searching for information goes beyond the boundary of physical libraries. Millions of documents of various media types, such as text, image, video, audio,...
Constructing Table-of-Content for Videos (1998)
Yong Rui, Thomas S. Huang, Sharad Mehrotra
A fundamental task in video analysis is to extract structures from the video to facilitate user's access #browsing and retrieval#. Motivated by the important role that Table-of-Content #ToC#...
Exploring Video Structure beyond the Shots (1998)
Yong Rui, Thomas S. Huang, Sharad Mehrotra
While existing shot-based video analysis approaches provide users with better access to the video than the raw data stream does, they are still not sufficient for meaningful video browsing and...
Supporting Ranked Boolean Similarity Queries in MARS (1998)
Michael Ortega, Yong Rui, Kaushik Chakrabarti, Kriengkrai Porkaew, Thomas S. Huang, Sharad Mehrotra
To address the emerging needs of applications that require access to and retrieval of multimedia objects, we are developing the Multimedia Analysis and Retrieval System (MARS) [29]. In this paper, we...
Supporting Ranked Boolean Similarity Queries in MARS (1998)
Michael Ortega, Yong Rui, Kaushik Chakrabarti, Alex Warshavsky, Sharad Mehrotra, Thomas S. Huang
To address the emerging needs of applications that require access to and retrieval of multimedia objects, we are developing the Multimedia Analysis and Retrieval System (MARS) in our group at the...
Relevance Feedback: A Power Tool for Interactive Content-Based Image Retrieval (1998)
Yong Rui, Thomas S. Huang, Michael Ortega, Sharad Mehrotra
Content-Based Image Retrieval (CBIR) has become one of the most active research areas in the past few years. Many visual feature representations have been explored and many systems built. While these...
Constructing Table-of-Content for Videos (1998)
Yong Rui, Thomas S. Huang, Sharad Mehrotra
A fundamental task in video analysis is to extract structures from the video to facilitate user's access (browsing and retrieval). Motivated by the important role that Table-of-Content (ToC)...
Exploring Video Structure Beyond The Shots (1998)
Yong Rui, Thomas S. Huang, Sharad Mehrotra
While existing shot-based video analysis approaches provide users with better access to the video than the raw data stream does, they are still not sufficient for meaningful video browsing and...
Adaptive Key Frame Extraction Using Unsupervised Clustering (1998)
Yueting Zhuang, Yong Rui, Thomas S. Huang, Sharad Mehrotra
Key frame extraction has been recognized as one of the important research issues in video information retrieval. Although progress has been made in key frame extraction, the existing approaches are...
Browsing and Retrieving Video Content in a Unified Framework (1998)
Yong Rui, Thomas S. Huang, Sharad Mehrotra
In this paper, we first review the recent research progress in video analysis, representation, browsing, and retrieval. Motivated by the mechanism used to access book's content, we then present...
Relevance feedback techniques in interactive content-based image retrieval (1998)
Yong Rui, Thomas S. Huang, Sharad Mehrotra
Content-Based Image Retrieval (CBIR) has become one of the most active research areas in the past few years. Many visual feature representations have been explored and many systems built. While these...
Supporting ranked Boolean similarity queries in MARS (1998)
Michael Ortega, Yong Rui, Kaushik Chakrabarti, Alex Warshavsky, Sharad Mehrotra, Thomas S. Huang
To address the emerging needs of applications that require access to and retrieval of multimedia objects, we are developing the Multimedia Analysis and Retrieval System (MARS) in our group at the...
Supporting content-based queries over images in MARS (1997)
Sharad Mehrotra, Yong Rui, Michael Ortega-binderberger, Thomas S. Huang
While advances in technology allow us to generate, transmit, and store large amounts of digital images, video, and audio, research in indexing and retrieval of multimedia information is still at its...
Supporting similarity queries in MARS (1997)
Michael Ortega, Yong Rui, Kaushik Chakrabarti, Sharad Mehrotra, Thomas S. Huang
To address the emerging needs of applications that require access to and retrieval of multimedia objects, we are developing the Multimedia Analysis and Retrieval System (MARS) in our group at the...
MARS and Its Applications to MPEG-7 (1997)
Yong Rui, Thomas S. Huang, Sharad Mehrotra
: To address the emerging needs of access to and retrieval of multimedia objects in many applications, we have started a Multimedia Analysis and Retrieval Systems project at the University of...
Multimedia Analysis and Retrieval System (1997)
Sharad Mehrotra, Yong Rui, Kaushik Chakrabarti, Micheal Ortega, Thomas S. Huang
Introduction With the advances in storage technology and the advent of the World Wide Web, there has been an explosion in the amount and complexity of digital information being generated, analyzed,...
Concurrency Control in Hierarchical Multidatabase Systems (1997)
Sharad Mehrotra, Henry F. Korth, Avi Silberschatz
. Over the past decade, significant research has been done towards developing transaction management algorithms for multidatabase systems. Most of this work assumes a monolithic architecture of the...
An Optimized Two-Safe Approach to Maintaining Remote Backup Systems (1997)
Kexiang Hu Sharad, Sharad Mehrotra, Simon Kaplan
In a remote backup system, transaction processing takes place at the primary and the log records generated at the primary are propagated to the remote backup which uses them to reconstruct a recent...
Content-Based Image Retrieval With Relevance Feedback In Mars (1997)
Yong Rui, Thomas S. Huang, Sharad Mehrotra
Technology advances in the areas of Image processing #IP# and Information Retrieval #IR# have evolved separately for a long time. However, successful content-based image retrieval systems require the...
Automatic Matching Tool Selection Using Relevance Feedback In Mars (1997)
Yong Rui, Thomas S. Huang, Sharad Mehrotra, Michael Ortega
For a given visual feature, due to the diversity of human's subjective judgment, a visual information retrieval system that supports a single prefixed similarity measure will result in poor...
Supporting Content-based Queries over Images in MARS (1997)
Sharad Mehrotra, Yong Rui, Michael Ortega-Binderberger, Thomas S. Huang
This paper summarizes the retrieval subsystem of MARS and its support for content-based queries over image features. Detailed discussion of the algorithms used can be found in #2#. Content-based...
Supporting Similarity Queries in MARS (1997)
Michael Ortega, Yong Rui, Kaushik Chakrabarti, Sharad Mehrotra, Thomas S. Huang
To address the emerging needs of applications that require access to and retrieval of multimedia objects, we are developing the Multimedia Analysis and Retrieval System #MARS# in our group at the...
An Optimized Two-Safe Approach to Maintaining Remote Backup Systems (1997)
Kexiang Hu Sharad, Sharad Mehrotra, Simon Kaplan
In a remote backup system, transaction processing takes place at the primary and the log records generated at the primary are propagated to the remote backup which uses them to reconstruct a recent...
Supporting Similarity Queries in MARS (1997)
Michael Ortega Yong, Yong Rui, Kaushik Chakrabarti, Sharad Mehrotra, Thomas S. Huang
To address the emerging needs of applications that require access to and retrieval of multimedia objects, we are developing the Multimedia Analysis and Retrieval System (MARS) in our group at the...
Dealing with Partial Failures in Multiple Processor Primary-Backup Systems (1997)
Sharad Mehrotra, Kexiang Hu, Simon Kaplan
Remote backup systems provide database availability even in case of disasters that cause complete database failure. In a remote backup system a backup tracks the transaction processing at the primary...
Concurrency Control in Hierarchical Multidatabase Systems (1997)
Sharad Mehrotra, Henry F. Korth, Avi Silberschatz
. Over the past decade, signi#cant research has been done towards developing transaction management algorithms for multidatabase systems. Most of this work assumes a monolithic architecture of the...
Dealing with Partial Failures in Multiple Processor Primary-Backup Systems (1997)
Sharad Mehrotra, Kexiang Hu, Simon Kaplan
Remote backup systems provide database availability even in case of disasters that cause complete database failure. In a remote backup system a backup tracks the transaction processing at the primary...
A relevance feedback architecture for content-based multimedia information retrieval systems (1997)
Yong Rui, Thomas S. Huang, Sharad Mehrotra, Michael Ortega
Content-based multimedia information retrieval (MIR) has become one of the most active research areas in the past few years. Many retrieval approaches based on extracting and representing visual...
Supporting Similarity Queries in MARS (1997)
Michael Ortega, Yong Rui, Kaushik Chakrabarti, Sharad Mehrotra, Thomas S. Huang
To address the emerging needs of applications that require access to and retrieval of multimedia objects, we are developing the Multimedia Analysis and Retrieval System (MARS) in our group at the...
Content-Based Image Retrieval With Relevance Feedback In Mars (1997)
Yong Rui, Thomas S. Huang, Sharad Mehrotra
Technology advances in the areas of Image processing (IP) and Information Retrieval (IR) have evolved separately for a long time. However, successful content-based image retrieval systems require the...
Supporting Content-based Queries over Images in MARS (1997)
Sharad Mehrotra, Yong Rui, Michael Ortega-Binderberger, Thomas S. Huang
This paper summarizes the retrieval subsystem of MARS and its support for content-based queries over image features. Detailed discussion of the algorithms used can be found in [2]. Content-based...
Multimedia Analysis and Retrieval System (1997)
Sharad Mehrotra, Yong Rui, Kaushik Chakrabarti, Micheal Ortega, Thomas S. Huang
Introduction With the advances in storage technology and the advent of the World Wide Web, there has been an explosion in the amount and complexity of digital information being generated, analyzed,...
Automatic Matching Tool Selection Using Relevance Feedback In Mars (1997)
Yong Rui, Thomas S. Huang, Sharad Mehrotra, Michael Ortega
For a given visual feature, due to the diversity of human's subjective judgment, a visual information retrieval system that supports a single prefixed similarity measure will result in poor...
F3.733e+05>The VLDB Journal (1997) 6: 152--172<F4.492e+05> (1997)
The Vldbjournal, Sharad Mehrotra, Henry F. Korth, Avi Silberschatz
.<F3.733e+05> Over the past decade, significant research has been done towards developing transaction management algorithms for multidatabase systems. Most of this work assumes a monolithic...
Supporting content-based queries over images in MARS (1997)
Sharad Mehrotra, Yong Rui, Michael Ortega-binderberger, Thomas S. Huang
While advances in technology allow us to generate, transmit, and store large amounts of digital images, video, and audio, research in indexing and retrieval of multimedia information is still at its...
Multimedia Analysis and Retrieval System (MARS) Project (1996)
Tom Huang, Sharad Mehrotra, Kannan Ramchandran
To address the emerging needs of applications that require access to and retrieval of multimedia objects, wehave started a Multimedia Analysis and Retrieval Systems #MARS# project at the University...
Multimedia Analysis and Retrieval System (MARS) Project (1996)
Tom Huang, Sharad Mehrotra, Kannan Ramchandran
To address the emerging needs of applications that require access to and retrieval of multimedia objects, we have started a Multimedia Analysis and Retrieval Systems (MARS) project at the University...
Sharad Mehrotra, Luddy Harrison
In recent work, we described a data prefetch mechanism for pointer-intensive and numeric computations, and presented some aggregate measurements on a suite of benchmarks to quantify its performance...
Data Prefetch Mechanisms For Accelerating Symbolic And Numeric Computation (1996)
hing. The behavior of the IRB on a suite of programs drawn from the Spec92, Spec95, and public domain codes, is measured under a variety of abstract models. Next, a detailed hardware design for the...
Performance driven global routing and wiring rule generation for high speed PCBs and MCMs (1995)
Sharad Mehrotra, Paul Franzon, Michael Steer
A new approach for performance-driven routing in highly congested high speed MCMs and PCBs is presented. Global routing is employed to manage delay, signal integrity and congestion simultaneously....
Efficient Processing of Proximity Queries for Large Databases (1995)
Walid Aref Daniel, Stephen Johnson, Sharad Mehrotra
Emerging multimedia applications require database systems to provide support for new types of objects and to process queries that may have no parallel in traditional database applications. One such...
Sharad Mehrotra, Luddy Harrison
This paper uses a simple recurrence-based classification of memory access patterns, introduced by us in earlier work [HM94], to develop a data prefetch mechanism (the Indirect Reference Buffer, or,...
Making Database Optimizers More Extensible (1995)
Dinesh Das, Dinesh Das, B. Tech, Dissertation Committee, G. Neelakantan Kartha, ...
I am deeply indebted to my advisor, Don Batory, for many years of encouragement and ad-vice, for providing constant direction and focus to my research, and for reading countless drafts of my...
INCAS: A Computation Model for Dynamic Workflows in Autonomous Distributed Environments (1994)
Daniel Barbara, Sharad Mehrotra, Marek Rusinkiewicz
A workflow is a long-duration multi-step activity. The task of the workflow manager is to automate the execution and the control of the workflow activities. In this paper we are interested in...
INCAS: A Computation Model for Dynamic Workflows in Autonomous Distributed Environments (1994)
Daniel Barbara, Sharad Mehrotra, Marek Rusinkiewicz
A workflow is a long-duration multi-step activity. The task of the workflow manager is to automate the execution and the control of the workflow activities. In this paper we are interested in...
A Data Prefetch Mechanism for Accelerating General-Purpose Computation (1994)
Luddy Harrison, Sharad Mehrotra
We describe a simple hardware device, the Indirect Reference Buffer , that can be used to speculatively prefetch pointer-linked, sparse matrix, or dense matrix data structures into primary data...
A Publication, Ieee Technical Committee, Vijay P. Bhatkar, Sharad Mehrotra, Sajal K. Das, Joseph Ja Ja, ...
On Correctness of Non-serializable Executions (1993)
Rajeev Rastogi Sharad, Sharad Mehrotra, Yuri Breitbart, Henry F. Korth, Avi Silberschatz
In a number of application environments (e.g., computer aided design), serializability, the traditionally accepted notion of correctness has been found to be too restrictive, and a number of...
On Correctness of Non-serializable Executions (1993)
Rajeev Rastogi, Sharad Mehrotra, Yuri Breitbart, Henry F. Korth, Avi Silberschatz
In a number of application environments #e.g., computer aided design#, serializability, the traditionally accepted notion of correctness has been found to be too restrictive, and a number of...
On Correctness of Non-serializable Executions (1993)
Sharad Mehrotra Rajeev, Sharad Mehrotra, Rajeev Rastogi, Rajeev Rastogi, Henry F. Korth, Henry F. Korth, ...
this paper, we continue our work on PWSR schedules. We first develop a theory of nonserializable executions that preserve database consistency. The cornerstone of our theory is the notion of...
Bulletin of the Technical Committee on Data Engineering (June, 1993 Vol. 16 No. 2) (1993)
Important Membership, March Issue, Rakesh Agrawal, David Lomet, ...
In many real world applications (even in banking), imprecise data is a matter of fact. However, classic database management systems provide little if any help in the management of imprecise data. We...
Analysis and Exploration of the program FALSE (1992)
Grant Haab, Michael Klemme, Sharad Mehrotra, Krishna Subramanian
The objective of the Human Genome Project is to map the underlying chemical structure of the different genes that constitute the human genome. The project is very expensive, requiring the expertise...
Efficient Global Transaction Management in Multidatabase Systems (1992)
Sharad Mehrotra, Sharad Mehrotra, Rajeev Rastogi, Rajeev Rastogi, Yuri Breitbart, Yuri Breitbart, ...
Concurrency control schemes for ensuring global serializability in a multidatabase system (MDBS) environment are complicated due to the autonomy of local database management systems (DBMSs). In order...
The Concurrency Control Problem in Multidatabases: Characteristics and Solutions (1991)
4: If site s k follows the 2PL protocol, then any function that maps every transaction T i 2 k to one of its operations that executes between the time T i obtains its last lock and the time it...
Relevance Feedback Techniques in Interactive Content-Based Image Retrieval
Yong Rui, Thomas S. Huang, Sharad Mehrotra
Content-Based Image Retrieval (CBIR) has become one of the most active research areas in the past few years. Many visual feature representations have been explored and many systems built. While these...