tools & techniques

White Papers

Leadership Style And Conflict In Decision Making Groups

September 28, 2007 12:00am PDT

This paper reviews the existing research on conflict in decision making groups, and the limited research on the effect of leadership style on such groups. The preferred leader actions are...

Provided by: University of Nebraska

White Papers

Periscope/SQ: Interactive Exploration of Biological Sequence Databases

September 28, 2007 12:00am PDT

Life science laboratories today have to rely on procedural techniques to store and manage large sequence datasets. Procedural techniques are cumbersome to use and are often very inefficient...

Provided by: Association for Computing Machinery

White Papers

IndeGS: Index Supported Graphics Data Server for CFD Data Postprocessing

September 28, 2007 12:00am PDT

Virtual reality techniques particularly in the field of CFD (Computational Fluid Dynamics) are of growing importance due to their ability to offer comfortable means to interactively explore 3D...

Provided by: Association for Computing Machinery

White Papers

Eliminating Impedance Mismatch in C++

September 28, 2007 12:00am PDT

Recently, the C# and the VISUAL BASIC communities were tantalized by the advent of LINQ- the Language INtegrated Query technology from Microsoft. LINQ represents a set of language extensions...

Provided by: Association for Computing Machinery

White Papers

A Simple and Efficient Estimation Method for Stream Expression Cardinalities

September 28, 2007 12:00am PDT

A top-k query retrieves the k highest scoring tuples from a data set with respect to a scoring function defined on the attributes of a tuple. The efficient evaluation of top-k queries has been an...

Provided by: Association for Computing Machinery

White Papers

Adhoc Top-k Query Answering for Data Streams

September 28, 2007 12:00am PDT

A top-k query retrieves the k highest scoring tuples from a data set with respect to a scoring function defined on the attributes of a tuple. The efficient evaluation of top-k queries has been an...

Provided by: Association for Computing Machinery

White Papers

RadixZip: Linear Time Compression of Token Streams

September 28, 2007 12:00am PDT

RadixZip is a block compression technique for token streams. It introduces RadixZip Transform, a linear time algorithm that rearranges bytes using a technique inspired by radix sorting. For...

Provided by: Association for Computing Machinery

White Papers

From Data Privacy to Location Privacy: Models and Algorithms

September 28, 2007 12:00am PDT

This tutorial presents the definition, the models and the techniques of location privacy from the data privacy perspective. By reviewing and revising the state of art research in data privacy...

Provided by: Association for Computing Machinery

White Papers

Probabilistic Graphical Models and Their Role in Databases

September 28, 2007 12:00am PDT

Probabilistic graphical models provide a framework for compact representation and efficient reasoning about the joint probability distribution of several interdependent variables. This is a...

Provided by: Association for Computing Machinery

White Papers

Measuring the Structural Similarity of Semistructured Documents Using Entropy

September 28, 2007 12:00am PDT

The authors propose a technique for measuring the structural similarity of semistructured documents based on entropy. After extracting the structural information from two documents they use either...

Provided by: Association for Computing Machinery

White Papers

VGRAM: Improving Performance of Approximate Queries on String Collections Using Variable-Length Grams

September 28, 2007 12:00am PDT

Many applications need to solve the following problem of approximate string matching: From a collection of strings, how to find those similar to a given string, or the strings in another (possibly...

Provided by: Association for Computing Machinery

White Papers

Answering Aggregation Queries in a Secure System Model

September 28, 2007 12:00am PDT

As more sensitive data is captured in electronic form, security becomes more and more important. Data encryption is the main technique for achieving security. While in the past enterprises were...

Provided by: Association for Computing Machinery

White Papers

Query Processing Over Incomplete Autonomous Databases

September 28, 2007 12:00am PDT

Incompleteness due to missing attribute values (aka "Null Values") is very common in autonomous web databases, on which user accesses are usually supported through mediators. Traditional query...

Provided by: Association for Computing Machinery

White Papers

ICRA: Effective Semantics for Ranked XML Keyword Search

September 28, 2007 12:00am PDT

Keyword search is a user-friendly way to query XML databases. Most previous efforts in this area focus on keyword proximity search in XML based on either tree data model or graph (or digraph) data...

Provided by: Association for Computing Machinery

White Papers

Value-­Based Notification Conditions in Large­Scale Publish/Subscribe Systems

September 28, 2007 12:00am PDT

The authors address the problem of providing scalable support for subscriptions with personalized value-based notification conditions in wide-area publish/subscribe systems. Notification...

Provided by: Association for Computing Machinery

Whitepapers

Security Implications of Cooperative Communications in Wireless Networks

September 28, 2007 12:00am PDT

Cooperative communications is an innovative technique that is expected to change the behavior of wireless networks in the near feature. In the MAC layer, this technique defines new protocols by...

Provided by: Polytechnic of Turin

White Papers

Towards a Benchmark for ETL Workflows

September 28, 2007 12:00am PDT

Extraction-Transform-Load (ETL) processes comprise complex data work-flows, which are responsible for the maintenance of a Data Warehouse. Their practical importance is denoted by the fact that a...

Provided by: Association for Computing Machinery

Blog Post

IBM's software for surveillance of Chicago's streets

September 27, 2007 10:31am PDT

IBM is teaming up with Chicago's Office of Emergency Management and Communications (OEMC) for analyzing the thousands of hours of video recorded by the street surveillance system. A quote from...

White Papers

Model-Driven Engineering for Development-Time QoS Validation of Component-Based Software Systems

September 27, 2007 12:00am PDT

Model-Driven Engineering (MDE) techniques are increasingly being used to address many of the development and operational lifecycle concerns of large-scale component-based systems. One such concern...

Provided by: Vanderbilt University

Case Studies

Currency Management Optimization: Getting More Bang for Your Buck

September 27, 2007 12:00am PDT

A currency management and optimization solution helps banks increase transparency in their supply chain, reduce the cost of cash handling, improve relationships with suppliers, and ensure customer...

Provided by: SAP