Coding has to do with representing data or information using a string of symbols over some alphabet.1 Often the term is used in referring to the translation of data represented by a string over one alphabet into a string over a different alphabet. The widely used ASCII (“American Standard Code for Information Interchange”), for example, associates a bit string of length seven to each of the 27 ...

This paper discusses a new method of hiding ASCII characters based on match between bit value of the randomly selected image pixel and the data bits. Bit positions in the higher nibbles of the cover image are used for data hiding at a position indicated using a 2-bit code. Simulation results on Lena, Gibbon and Cat images [1] for hiding a large set of ASCII text characters indicate that suggest...

In literature, many feature types and learning algorithms are proposed for document classiication. However , an extensive and systematic evaluation of the various approaches has not been done yet. In order to investigate diierent text representations for document classiication, we have developed a tool which transforms documents into feature-value representations suitable for standard learning ...

Public cloud is an environment in which many users share resources, but the consumer has to sacrifice security owing to the multi tenancy feature of cloud computing. However, maintaining Confidentiality and Security for critical data is highly challenging. Taking account of the static nature of user validation, this paper address authentication and confidentiality issues. A methodology has been...

A graphical program was created, to simplify the acquisition of data and data conversion from bin to ASCII, for data obtained by a Stanford Research Multichannel Scaler/Averager (SR430). The SR430 receives the data in the form of pulses from a photomultiplier tube (PMT). The PMT serves as the detector in a pulsed laser spectroscopy experiment. The program was created in LabVIEW TM which was dev...

This paper describes qddb, a database program suite that addresses the common situation in which data are infrequently changed. Searches in the stable parts of databases are very e cient because they use hash-based searching through a completely inverted index, whereas searches in updated sections are less so. All les used by qddb are in Ascii format, so they can be easily modied by a knowledge...

We present the design and performance of a non-adaptive hardware system for data compression by arithmetic coding. The alphabet of the data source is the full 256-symbol ASCII character set, plus a non-ASCII end-ofle symbol. The key ideas of our system are the non-arithmetic representation of the current interval width, which yields improved coding e ciency in the interval-width update, and a r...

This paper describes an empirical study with children that compared the three methods of writing using pencil and paper, using the QWERTY keyboard at a computer, and using a pen and graphics tablet. The children wrote short stories. Where the graphics tablet was used, the text was recognized and presented to the children as ASCII text. Measures of user satisfaction, quantity of writing produced...