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A MPPT based transformer less high step-up dc-dc cascode converter is proposed in this paper. The cascode converter utilizes two buck-boost converters (lower and upper semi-stage converters); they are integrated with a single active switch. The input voltage of lower semi-stage is from the dc source. The input voltage of upper semi-stage is from the dc source and the output voltage of the lower semi-stage...
This paper presents the closed loop model of modified interleaved buck converter (IBC) with low switching losses and improved step-down conversion ratio for the applications with high input voltage. Unlike conventional IBC, two active switches are connected in series and a coupling capacitor is employed in the power path. The losses associated with the power devices can be reduced as the voltage stress...
In most portable electronics equipment's, batteries are used as a source of power. Some efficient power management technique is required in order to get longer battery life. In some batteries, output voltage is not constant so an additional switching power unit is required to get a constant output voltage. Due to the power loss occurs in the storage devices, the efficiency of these converters is reduced...
Complexity of power system is increasing due to expansion of interconnections. Blackouts and cascaded failures are associated with divergent situations in power system. Dynamics of power system pushes the behavior differently under different values of parameters such as increase in load demand at very sensitive bus in power system which may trigger exponential rise in power flows through lines leading...
Reliability is one of the most accountable issue in the power industry today. Quantitative analysis of power systems reliability can be obtained with the help of reliability indices. Various methods have been introduced and developed over time to evaluate the reliability indices of the power system. This paper gives general idea about reliability of power systems and also highlights the different...
In the context of power systems with deep efficiency concerns, demand response gains significant importance. Moreover, demand response can play a very relevant role in the electrical systems with an intensive use of distributed energy resources. During the effort to accommodate larger shares of renewable energy sources, while maintaining the power balance and ensuring the reliability of the power...
Multicore processor architectures have been gaining increasing popularity in recent years. However, many available applications cannot take full advantage of these architectures. Therefore, many researchers have developed several characterization techniques to help programmers to understand the behavior of these applications on multicore platforms and to tune them for better efficiency. Characterizing...
Proportional-integral (PI) controller is very useful for controlling speed and torque variables in three-phase induction motor (TIM) operation. However, the conventional PI controller has the exhaustive traditional trial and error procedure in obtaining parameters of PI controller. This paper presents an adaptive PI controller to improve indirect field oriented control (IFOC) design technique for...
This paper deals with the level control of a prototyped Split Range Plant Process. The conventional PID Controller is initially applied to the process and the results are obtained. As the system takes a large settling time the following two controllers are also implemented. Apart from lowering the settling time, to increase the robustness of the system Sliding Mode Control (SMC) and Dynamic Sliding...
This paper provides an overview of online student feedback systems in tertiary institutions. It is then introduce a student feedback online system (SuFO) developed and used in a public university in Malaysia. Subsequently, this paper describes how data from SuFO is used to observe the quality of teaching between experience and inexperience lecturer. The evaluation is based on students' response in...
Pencil Code, a web-based program, utilizes blocks to aid students in creating code. This paper presents work creating a debugging tool to further improve Pencil Code and create an environment where students can better learn to understand code by having a way to visually trace its operations.
‘Flipping the Classroom’ is a well-known effective educational approach which can produce significant learning gains. Students are doing the preliminary cognitive work to gain knowledge and comprehension outside of class, then focusing on the advanced cognitive work on application, analysis, synthesis, and evaluation in class. However, practically its application is quite challenging due to the limited...
Work in Progress: This paper reports the study on how peer review instruments based on existing e-learning tools can affect the quality of peer review process and how this type of tools can benefit the reviewers. The study starts from a pilot study on constructing peer assessment instruments for an assignment in a Master course by using PeerMark and Moodle workshop. A comparison of these two tools...
The complex and multidisciplinary nature of today's engineering problems demands that new graduates excel in not only technical knowledge but also teamwork skills. In fact, the lack of effective teamwork has been identified among the most important factors contributing to the high failure rate of complex engineering projects. In this paper, we focus on engineering students' attitudes toward teamwork,...
During workshops on computer animation using Alice, a free platform for three dimensional computer animation created by Carnegie Mellon University, we detected and observed a series of different patterns of use of the platform by attendants. Most participants would start following instructions as precisely as possible. Within a short time some would divert to create visually attractive scenes worrying...
This paper gives the preliminary analysis based on the Peaucellier inversion instrument, and calculates the inverse apparatus according to the theory of inversion, a straight mechanism based on the Peaucellier inversion is designed and calculate the maximum circle radius of inversion instrument. Then instrument could switch between the straight line and circle by improving the straight line organization...
The Academic Management System (AMS) is a system capable of storing, managing, and modifying student related information within a database. The AMS is a necessary tool that assists university staff in handling students' big data within the institution. The lack of system usability within the AMS has led to low staff productivity, dissatisfaction, repetitive errors in data entry, emotional distraction...
In this paper a new compression scheme has been formulated based on jointly delta modulation with biasing and Run Length Encoding technique for Direct Normalized Solar Irradiance data. The key features of this Compression Algorithm (Delta Modulation with Biasing and Run Length Encoding techniques viz. DMBRLE) are: it requires less memory as it belongs to direct compression method and its lossless...
The purpose of this research is to examine elementary and middle school teachers' readiness as online learners by developing the Teacher Readiness for Online Learning Measure (TROLM). This paper draws on the two semesters of 2012 from an online course on Internet literacy and ethics for practicing teachers. Results of exploratory factory analysis support an 18-item scale comprising four factors: communication...
In this paper, we present the construction and architecture of SangeetKosh: an open platform for studying North Indian or Hindustani Classical Music (HCM) on the web. This platform works on a three faceted architecture - to provide musical experiments, quizzes and drills, to host and find repositories of music, to semantically link and annotate pre-existing musical content on the web using open linked...
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