Indexing plays an important role for storing and retrieving the data in Information Retrieval System (IRS). Inverted Index is the most frequently used indexing structure in IRS. In order to reduce the size of the index and retrieve the data efficiently, compression schemes are used, because the retrieval of compressed data is faster than uncompressed data. High speed compression schemes can imp...

Steganography embeds a secret message in an innocuous cover-object. This paper identifies three cover-specific redundancies of executable programs and presents steganographic techniques to exploit these redundancies. A general framework to evaluate the stealth of the proposed techniques is introduced and applied on an implementation for the IA-32 architecture. This evaluation proves that, where...

Nawaz, Gupta and Gong recently proposed a 32-bit RC4-like stream cipher. In this paper, we show that the keystream generated from their stream cipher is not random. The keystream can be distinguished from random with only about 100 outputs (3200 bits) in 2 milliseconds on Intel Centrino 1.6GHz processor.

ITE JOURNAL / NOVEMBER 1999 HIGHWAY-RAILROAD GRADE crossings are a relatively unique and sometimes perilous intersection of two transportation modes. The cost of collisions at these intersections is high in both dollars and human lives. The amount and type of sight distance provided at highway-railroad grade crossings can have significant impacts on safety. The proper calculation of these sight...

ITE JOURNAL / FEBRUARY 2001 ALL OVER THE WORLD, ROAD safety appears to be considered a problem with many (social) consequences. Everywhere in the world people are trying to improve road safety. Yet, relevant literature contains many indications that road safety improvements are moving slowly. Several causes for this are given. First, the political priority is relatively low. Second, it is not w...

1Department of Dermatology, College of Medicine, University of Baghdad, Baghdad, Iraq. 2Department of Community Medicine, Saddam Medical College, Saddam University, Baghdad, Iraq (Correspondence to W. A. Al-Kubaisy: [email protected]). 3Department of Community Medicine, College of Medicine, Al-Mustansiriyah University, Baghdad, Iraq. Received: 13/09/01; accepted: 07/04/04 ABSTRACT To determin...

The vast majority of children presenting for surgery on the eye are healthy. However, there are a number of ophthalmologic conditions that are often accompanied by coexisting morbidities.The majority of infants presenting for cataract surgery in the newborn period do not have coexisting diseases, but a variety of pediatric syndromes include cataracts in the constellation of derangements. Some e...