generally, this article deals with the challenges and solutions facing the internet security. first, the article discusses the following subjects: the security of communication and information networks, the importance of the networks, the networks security precedence internet and computers crimes, the beginning of computer crimes, classifying computer crimes as well as the solutions proposed to...

Conventional computer display products for the visually impaired are limited by the amount of enlarged imagery that can be displayed at any one time, and by awkward methods for navigating about the scene. This paper describes a prototype system designed to address these problems by providing a head-mounted display interface which allows the user to position a cursor anywhere on an enlarged virt...

The use of computers today almost always requires that the user is able to see what is presented on the screen, a requirement that blind computer users are not able to fulfill. Many features of the graphical user interface are inaccessible for blind computer users; direct manipulation is one of them. Direct manipulation is a fundamental property of graphical user interfaces which makes the inte...

a computer software was designed to facilitate identification of nematode species. the first section of the computer program was prepared to identify the species of the genus criconemoides. nemidsoft can be easily installed on personal computers with a minimal requirements. the software can be edited by users and developed and generalized to other genera of the nematodes. by having the morpholo...

the advent of computer has revolutionized a variety of fields including education thus paving the way for educational science to enter a new stage. this effect has exhibited itself well in language learning. the development of computer technology and the resulting language learning software, as a reliable tool in the educational system of developed countries, has attracted the attention of both...

In this paper we discuss the design of computer-based haptic graphs for blind and visually impaired people with the support of our preliminary experimental results. Since visual impairment makes data visualisation techniques inappropriate for blind people, we are developing a system which can make graphs accessible through haptic and audio media. The disparity between human haptic perception an...

Computer security has traditionally been assessed from a technical point of view. In this paper, we wish to adopt a cognitive standpoint and investigate some of the cognitive processes involved in computer security. One angle which is not considered very often is the active role played by legal users of systems in impairing the level of protection. In this paper, we thus attempt to highlight th...

We describe the structure of a Bayesian network designed to monitor the behavior of a user interacting with a conversational computer and use that information to estimate the user’s emotional state. Our model of emotional state uses two discrete dimensions, valence (bad to good) and arousal (calm to excited), to capture the dominant aspects of physical emotional response. Emotion is expressed b...

Purpose: To investigate associations between computer use data and sleep quality among university students. Materials and Methods: This descriptive, cross-sectional study was performed on 312 students of Tehran University of Medical Sciences, Iran. Data was collected using Epworth Sleepiness Scale (ESS), Insomnia Severity Index (TSI), Pittsburgh Sleep Quality Index (PSQI), and a background...