Three serious games were developed for the same age group (12-16 year old students): one for teaching geometry, one for civic education and a third multimedia drug guide to prevent drug use. The software packages have been given a friendly interface so that they are easy to use, even by computer novices. All three of them deliver totally different knowledge; therefore their design is also different. These designs are described in this article and the following questions are investigated: How does design influence students' motivation? How does operational method influence usability?Hungary's borders opened some 20 years ago, and this -besides all of its positive effects -introduced a number of negative tendencies as well. Today, one of the most acute problems is teenager's drug use.The third tutorial was written for the young. This was the reason we chose a multimedia presentation format. The "Multimedia tutorial drug guide" is available as a CD-ROM. It has been produced with Macromedia Director. It can be used in secondary schools as part of a 'tutor group' or form-teacher's class".It has been tested by eighth grade students in the following three different ways: (1) individual use of the CD-ROM at home, (2) use of it in the school's computer laboratory and (3) comparing the effectiveness with a class discussion with teacher guidance without using the CD-ROM. The paper also deals with the evaluation of these tests.
Our project has developed an application for mobile telephones to provide a catalogue of Enumbers and E-names: the food additives widely known as "E-numbers". Our application, the MIni Food E-Additive Database (MIFED) provides a user interface that is friendly and easy to use. To achieve our main goal of platform independence we applied the JAVA programming language to implement our software. Thus, based on JAVA our software can run on a very wide range of mobile devices. The development process of the software is outlined in this paper.
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