Abstract With the rapid growth of computer technology in the recent years, electronic information has been rapidly increased and become more and more important to help users access a huge volume of web pages. This is really noticeable to find the information in efficient and effective manner especially on the web, when we are working in heterogeneous environment. As the availability of information... With the rapid growth of computer technology in the recent years, electronic information has been rapidly increased and become more and more important to help users access a huge volume of web pages. This is really noticeable to find the information in efficient and effective manner especially on the web, when we are working in heterogeneous environment. As the availability of information increases on the web, the need of finding proper and accurate information is also a challenging task. There are the numerous ways to find the information on the web but the ultimate need nowadays is that of predicting the user needs in order to improve the usability and user retention. In this paper we have proposed an algorithm which shows superior performance compared to other existing methods and that will provide most accurate, fast and relevant information in front of the user. Read More Read Less

Abstract Effective timed data processing belongs to one of the most important task of the development of current information and database systems. It is not, however, only the changes in time management, but also the complex record of changes during the whole life cycle of the object – historical values, actual states, but also data valid in the future. Existing temporal solutions are... Effective timed data processing belongs to one of the most important task of the development of current information and database systems. It is not, however, only the changes in time management, but also the complex record of changes during the whole life cycle of the object – historical values, actual states, but also data valid in the future. Existing temporal solutions are inadequate in terms of performance - effectiveness of the whole system, which is manifested by the size of the required data and processing time. There is no temporal solution for Select statement defined and user has to manage it explicitly. This paper deals with the principles of temporal data modelling on object and attribute level. It also describes the characteristics of Select statement used in temporal system, extends it with new characteristics and defines new layer for transformation into existing syntax. Read More Read Less

Abstract Computing is facing another revolution. This time it is called ‘Cloud Computing’ and involves accessing software applications, data storage and processing power over the Internet. In this paper, we describe the multistage anomaly detection scheme to DDoS attacks in cloud computing resource of future internet. This scheme is composed by 3 stages. Monitoring stage performs misuse detection by rules of attack... Computing is facing another revolution. This time it is called ‘Cloud Computing’ and involves accessing software applications, data storage and processing power over the Internet. In this paper, we describe the multistage anomaly detection scheme to DDoS attacks in cloud computing resource of future internet. This scheme is composed by 3 stages. Monitoring stage performs misuse detection by rules of attack patterns to well-known DDoS attacks. Lightweight anomaly detection stage could classified volume data into large volume data and small volume data, and applied Bayesian methods. And focused Anomaly detection stage is performed to detect new DDoS attacks by unsupervised learning algorithm. Read More Read Less

Abstract In the execution of bridge or overpass decks several construction processes are applied. A geometric model 4D (3D + time) in a Virtual Reality (VR) environment which simulates the construction of a bridge deck composed of precast beams was implemented. The model allows viewing and interaction with the various steps and the main elements involved in the construction process. In order... In the execution of bridge or overpass decks several construction processes are applied. A geometric model 4D (3D + time) in a Virtual Reality (VR) environment which simulates the construction of a bridge deck composed of precast beams was implemented. The model allows viewing and interaction with the various steps and the main elements involved in the construction process. In order to develop the virtual model, the components of the construction, the steps inherent in the process and its followup and the type and mode of operation of the required equipment were initially examined, in detail. Based on this study, the 3D geometric modelling of the different elements that make up the site was created and a schedule that would simulate an interactive mode of construction activity was established. As the model is interactive, it allows the user to have access to different stages of the construction process, thus allowing different views in time and in space throughout the development of construction work, thereby supporting understanding of this constructive method. Since the model is didactic in character it can be used to support the training of students and professionals in the field of Bridge Construction. The VR application is currently used to support Bridge classes. Read More Read Less