Catálogo de publicaciones - libros

Constructivist learning theory has shown its advantages on learning system by improving students’ interests and ability. In this paper, we introduce some research works of constructivist learning theory and some successful methods from ACM/IEEE-CS CC2001 course. Application for GV (Graphics and Visual Computing) shows the power that integrating constructivist view of learning with the real learning environment. Based on theory, we analyze visualization methods of Computer Graphics course material, represent a new four-lay division of GV curriculum. And we introduce scaffolding learning method, which helps students improve knowledge exploring ability. CVCS1.1 and GraphVCF1.0 are two efficient virtual platforms used in our virtual learning process. Experiments show that constructivist view of learning and its application in GV bring more efficiency and convenience to build a virtual learning environment.

In this paper, we introduce an evaluation system for identifying program similarity by comparing syntax-trees for the given programs. By using syntax-trees, this system is capable of distinguishing plagiarism in spite of changes in program styles such as indent, white space and comments. It can also recognize plagiarism patterns resulting from changes in program structure such as statement exchanges, code block and function. Syntax-trees are created after program parsing, so they have the advantage of performing syntax and semantic analysis automatically. We also introduce an evaluation algorithm for program similarity and a grouping algorithm for the sake of reducing the count of comparisons. The experiment and estimation proves that a grouping algorithm can reduce a lot of counts of comparison.

In this paper, we present a system referred to as “Hello-Vision.” Hello-Vision is a software development environment that can be used in conjunction with research and application development in the area of image processing. It is an integrated environment that supports reusable image processing algorithm developments, systematic management of algorithms and related information. Hello-Vision’s function is to simplify image processing applications using the algorithms and to provide an ideal environment for the education of practical image processing engineers. Hello-Vision adopts a true object-oriented approach supporting well-separated data classes similar to IUE (Image Understanding Environment) classes. This process allows algorithm to be written by their functions without user interface programming by separating the interface layer from data processing functions. The user-defined functions are easily registered in the online algorithm management systems and treated as a system command. Hello-Vision is equipped with a visual programming environment where a user can easily create image- processing applications by manipulating visual command icons and user-defined function icons that are created automatically when they are registered. Hello-Vision also provides an ideal environment where instructors can register their lecture materials for image processing theory, which allows hands-on experimentation with Hello-Vision through user interaction.

While current school education on computers and communication for the gifted students has mainly focused on knowledge and skills on computer, ethical issues on computer knowledge and technologies have not been dealt with sufficiently. In this paper, we introduce a Web-based information communication ethics education system for the gifted elementary school students in computer. The proposed system has the following characteristics: First, our system provides comprehensive areas of information communication ethics issues for the gifted elementary school students in computer. Second, for the sake of active participation and arousing interests, avatars are used to explain contents and guide students with voice message. Third, for each subject, there are three steps, and to follow so that students can learn ethics by discussion rather than learning by heart. Fourth, for encouraging active communication between a teacher and students, various tools are supported. Finally, our system supports online survey or vote to check students’ changes in information communication ethics.

In this study, two programs which are being implemented in Ege University [13] since 2002 are presented. These programs are based on international standards. One of the programs is for the students of the university, the other one is for the people who are unemployed or who want to be employed in Information Technology (IT) business. The first education program that covers all university students is based on the standard of international European Computer Driving License (ECDL). The second program is IT employment program that is based on the curriculum of American Computing Association (ACM). The design, implementation and results of both of these programs are discussed in this study.

Most of the intelligent tutoring system (ITS) is used to deliver knowledge and train skills based on the expert model. According to the theories of leaning, learning by teaching method is more efficient for enhancing motivation to learn and cognitive ability than learning by listening or learning by reading. For the purpose of developing an adaptive intelligent agent to enhance the motivation to learn, the new type of teachable agent were designed and implemented, the KORI (KORea university Intelligent agent), in which the user plays a role of a tutor by teaching the agent using a concept map, posing questions, and providing feedbacks. KORI consists of four independent modules: teach module, Q&A module, test module, and resource module. In teach module, the KORI’s knowledge is structured and organized through the concept map and the KORI makes new knowledge from the inference engine. In Q&A module, the KORI can provide answers to the users’ questions through an interactive window. It is expected that providing the user with the active role of teaching the agent enhance the motivation to learn and the positive attitude toward the subject matter as well as cognition.

Security has been more crucial issue as targets of attacker are wide ranges from personal information to various things in ubiquitous computing environments. Portable computing devices such as cellular phone, PDA, and smart phone in such conditions have been exposured under security threats, which cause attacker to exploit malicious code and modification of storied data. In this paper we present security threats and their countermeasures in technical, manageable, and physical aspect of mobile portable computing devices. We believe that this paper will contributes on initiating a research on security issues of mobile portable computing devices and provide users with guidance to keep their information safe in mobile communication environments.

Even though the importance of a Business Model (BM) in ubiquitous computing environments has been growing, current research mainly focuses only on technology. Without a proper evaluation method for a BM, a promising BM has not been verified. In this research, we suggested a BM development methodology for ubiquitous computing, which contains the Business Model Analysis (BMA) framework for analyzing a BM and the Business Model Feasibility Analysis (BMFA) framework for evaluating a BM. The methodology is composed of phases, activities, and tasks in detail and depth, having systematic relations to each other. A prospective BM of ubiquitous computing environments could be extracted by this methodology.

This study reviews and analyzes contradictions embedded in two different perspectives looking at ubiquitous computing: demand-side and supply-side. It is argued here that these differences in perspective may contain contractions in terms of assumptions which may deter developers from properly conceiving future applications and services in ubiquitous computing. Five distinct aspects – anybody, anytime, anywhere, any service, and any device – were used as an analysis framework against ‘for me,’ ‘right now,’ ‘right here,’ ‘what I need,’ and ‘what I have.’ Underlying factors that makes differences are suggested and discussions are made. Implications are discussed and further research is suggested.

As we enter the 21st century, the term “ubiquitous computing” is emerging. The emerging benefits of “ubiquitous computing” have the potential of fundamentally altering the way we live and work. Most companies are in business to win, and outperform their competitors. They adopt new technologies to fend off new competitors, reinforce an exciting competitive advantage, leapfrog competitors, or just to make money in new markets. Performance is critical. Only recently have companies been in a better position to comprehend how to use new technology such as ubiquitous computing. So now, too many companies are interested in using ubiquitous computing. Our research includes the following: First, we used previous research about the definition of business models and characteristics of ubiquitous computing. Second, we analyzed value chains for ubiquitous computing. Finally, we suggest a new value chain considering ubiquitous computing environment.