Abstract This paper presents the design and implementation of a new system to manage email messages using evolving email clustering method with unsupervised learning approach to group emails base on activities found in the email messages, namely email grouping. Users spend a lot of time reading, replying and organizing their emails. To help users organize their email messages, we propose a... This paper presents the design and implementation of a new system to manage email messages using evolving email clustering method with unsupervised learning approach to group emails base on activities found in the email messages, namely email grouping. Users spend a lot of time reading, replying and organizing their emails. To help users organize their email messages, we propose a new framework to help organise and prioritize email better. The goal is to provide highly structured and prioritized emails, thus saving the user from browsing through each email one by one and help to save time. Read More Read Less

Abstract This work presents a new topology of delta modulation technique. This kind of modulation technique is usually used to improve the power factor of Pulse Width Modulation (PWM) converters used for supplying A.C. drives. Many new topologies have been presented trying to obtain a cost-effective solution to reduce the input current harmonic content and to make it sinusoidal and in... This work presents a new topology of delta modulation technique. This kind of modulation technique is usually used to improve the power factor of Pulse Width Modulation (PWM) converters used for supplying A.C. drives. Many new topologies have been presented trying to obtain a cost-effective solution to reduce the input current harmonic content and to make it sinusoidal and in phase with the input voltage of AC-DC converters. Each one of them has its application range due to the inherent characteristics of the topology (See [2]). Obviously, not every converter is useful for the same application. Hence, this paper tries to show the most appropriate topology of different variants of modulation technique used for power factor correction. This technique which is used to generate the PWM control signals for the main devices of the PWM converter has the advantage of yielding instantaneous current control, resulting in a fast response [3], [4]. However, the switching frequency is not constant and varies over a wide range during each half-cycle of the A.C. input voltage. Furthermore, the frequency is also sensitive to the values of the circuit components, which is also addressed in this paper. This new delta modulation technique topology proves to give great stability performance over other variants of delta modulation or other modulation techniques. Read More Read Less

Abstract Since its early stages, science has been developing and using models to explain and understand our life, our world and the universe. Among different approaches to develop these models, the Multi-agent Based Systems (MABS) approach has been gaining attention and importance as a third way of doing science. This third way consists of using MABS to develop models capable to... Since its early stages, science has been developing and using models to explain and understand our life, our world and the universe. Among different approaches to develop these models, the Multi-agent Based Systems (MABS) approach has been gaining attention and importance as a third way of doing science. This third way consists of using MABS to develop models capable to reproduce properties of a complex system. Thereby, investigating the foundations to the development of such models, this paper presents the main concepts of complex systems, as well as the computational requirements implemented by the CORMAS, which is a MABS platform. Read More Read Less

Abstract This paper is intended to help control engineers and designers of high power industrial application such as engineers of traction motor control as well as control engineers and designers of very low power industrial applications such as designers of computer motherboards and other circuits using Infinity’s LX166x family of buck regulator. The paper deals with the effect of replacing... This paper is intended to help control engineers and designers of high power industrial application such as engineers of traction motor control as well as control engineers and designers of very low power industrial applications such as designers of computer motherboards and other circuits using Infinity’s LX166x family of buck regulator. The paper deals with the effect of replacing the smoothing filters without magnetic coupling used for reducing the ripple generated at the output of buck regulators by a new topology known as magnetically coupled filters. The main attention is focused on the analysis and the simulation of the two-phase parallel connection of buck regulator with magnetically coupled filters known as an interphase reactor or transformer. A comparison of the two-phase connections with smoothing filters without magnetic coupling or with magnetically coupled filters is then done. Actual criteria for comparison may be carried out from technical parameters and investment perspectives. Technical parameters are considered to be: Distribution of currents into phases and harmonic content (the amount of the ripple in the load current). Investment costs depend on demands to the material needed for designing the filters. The result of using the magnetically coupled filters is a progressive reduction of the harmonic content generated at the output. Read More Read Less

Abstract This paper presents a pilot study on the creation and implementation of digital storytelling. This is in response to the evolving technologies in which the digital devices is now indispensable. It progressively transforms modern societies into a virtual space. The main content of this paper is a pilot study in creating digital storytelling. In addition, it also discusses about the... This paper presents a pilot study on the creation and implementation of digital storytelling. This is in response to the evolving technologies in which the digital devices is now indispensable. It progressively transforms modern societies into a virtual space. The main content of this paper is a pilot study in creating digital storytelling. In addition, it also discusses about the potentials of digital s torytelling in education, personal information sharing, and marketing. Read More Read Less

Abstract In the area of information extraction, event extraction is a challenging task which attracts much attention. This paper focuses on its subtask, event argument extraction, and presents a semi-supervised clustering method for extracting event argument. Considering the particular contributions of different features on clustering analysis, the method weights features by introducing the ReliefF algorithm. Constrained-KMeans, a semi-supervised clustering algorithm, is... In the area of information extraction, event extraction is a challenging task which attracts much attention. This paper focuses on its subtask, event argument extraction, and presents a semi-supervised clustering method for extracting event argument. Considering the particular contributions of different features on clustering analysis, the method weights features by introducing the ReliefF algorithm. Constrained-KMeans, a semi-supervised clustering algorithm, is employed to group event arguments. Compared with normal Constrained-KMeans algorithm, feature weighting obviously improves the F-Measure of system performance. The comprehensive experimental results also demonstrate the outstanding performance of our method. Read More Read Less