Air quality index (AQI) also known as air pollution (API) is the way of describing ambient to assess health risk associated with pollution. With advent time, there have been several indexing systems starting from first Quality Index developed in 1966 by Marvin H. Green and various modifications made ever since improve accuracy measurement. Such can factors like concentration different pollutant...

In this paper, a surveillance system devoted to detect abandoned objects in unattended environments is presented to which image processing content based retrieval capabilities have been added for making easier inspection task from operators. Video-based surveillance systems generally employ one or more cameras connected to a set of monitors. This kind of systems needs the presence of a human op...

An important factor that plays a major role in determining the performances of a CBR system is the complexity and the accuracy of the case retrieval phase. Both at memory and inductive approaches suuer from serious drawbacks. In the rst approach, the search time becomes considerable when dealing with large scale memory base, while in the second one the modiications of the case memory becomes ve...

The use of Vector Space Models (VSM) in the area of Information Retrieval is an established practice, thanks to its very clean and solid formalism that allows us to easily represent objects in a vector space and to perform calculations on them. The goal of this work is to investigate the impact of VSM on Recommender Systems (RS) performance. Specifically, we will introduce two approaches: the f...

Modern document collections often contain groups of documents with overlapping or shared content. However, most information retrieval systems process each document separately, causing shared content to be indexed multiple times. In this paper, we describe a new document representation model where related documents are organized as a tree, allowing shared content to be indexed just once. We show...

Although object oriented database systems o er more powerful modeling capability than relational database systems their performance su ers from the increased complexity in the data model Thus e cient index mech anisms must be used to improve the performance In this paper two new signature methods for indexing object oriented databases and the associated operations are de scribed The cost models...

Multimedia data, such as text, audio, images and video, is rapidly evolving as the main form for the creation, exchange, and storage of information in the modern era. Primarily, this is attributed to rapid advances in the three major technologies that determine its growth: VLSI technology that is producing greater processing power; broad-band networks (ISDN, ATM, etc) that are providing much hi...

InNovember 1958, at the International Conference on Scientific Information (ICSI) in Washington, DC, Hans Peter Luhn, of the International Business Machines (IBM) Company, and Herbert M. Ohlman, of the System Development Corporation (SDC), simultaneously and independently presented their new systems for automatic indexing. Luhn called his system “Keyword-in-Context (KWIC) indexing” and Ohlman c...