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Today, many students are study computer science. Although they study different courses, they rarely do homework or projects related to real world problems. In this paper, we design a project to show some of the problems which are occured during implementing a real word project to the students. In this project, the students are asked to implement the FFT (fast Fourier transform) algorithm on a personal...
In last 20 years, the Internet and mobile communication growth in parallel. There are many sites specially designed for mobile phones that users must enter username and password to enter them. In this paper we introduce a new method based on CAPTCHA which does not require entering any password. Instead of entering the password, an image of a number is shown to the user and he/she must type it. The...
Nowadays, many daily human activities such as education, commerce, talks, etc. are carried out through the Internet. In cases such as the registering in websites, some hackers write programs to make automatic false enrolments which waste the resources of the website while this may even stop the entire website from working. Therefore, it is necessary to tell apart human users from computer programs...
Earthquake is one of the natural disasters which have a lot of victims each year. If the rescue mission for saving victims be done in first hours after the earthquake, the number of earthquake victims can be lowered. Different methods had been proposed to find victims under devastated buildings which some of them are expensive and time consuming and aren't applicable in under developing countries...
Nowadays, many daily human activities such as education, commerce, talks, etc. are carried out through the Internet. In cases such as the registering in Web sites, some hackers write programs to make automatic false enrolments which waste the resources of the Web site while this may even stop the entire Web site from working. Therefore, it is necessary to tell apart human users from computer programs...
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