ISSN 2253-0150

Editor-in-Chief :
Mohamed Ridda LAOUAR

Table of contents:
Volume 1 issue 2 - Current Issue
Published: 2013


- Sean B. Eom, Department of Accounting, Southeast Missouri State University, USA
Antecedents and Outcomes of Interaction in Asynchronous E-Learning Courses: Nonlinear PLS Path Modeling Approach using WarpPLS (1-7)
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The primary objective of this study is to investigate the relationship between interaction and students’ perceived learning outcomes and satisfaction in university online education using e-learning systems. A total of 397 valid unduplicated responses from students who have completed at least one online course at a university in the Midwest were used to examine the structural model. The six sets of hypotheses were tested using a quantitative survey of satisfaction and learning outcome perceptions of students who have taken at least one online course at a large mid-western university in the United States.
The study makes a unique contribution to understanding the antecedents of and outcomes of interaction in e-learning. The research model was tested by using a WarpPLS analysis on the survey data. All hypotheses in this study received full support. We found that all three factors—course structure, self-motivation, and learning styles—moderately influenced the level of students' interaction with peers and the instructor. Moreover, perceived learning outcomes and student satisfaction are moderately related to perceived level of interaction. This study makes another important contribution in revealing the non-linear relationships between interactions and learning outcomes. As far as we know, this is the first study using WarpPLS to reveal such non-linear relationships among constructs.

- Anju BABY and Jeno LOVESUM, Karunya University, India
A Survey on Honey Bee Inspired Load Balancing of tasks in Cloud Computing (8-16)
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Cloud computing is nothing but a collection of computing resources and services pooled together and are provided to the users on pay-as-needed basis. Load balancing is a computer networking method for distributing workloads across different computing resources, like computers, a computer cluster, network links, and central processing units. Main goal of the load balancing technique is to optimize use of resources, maximize the throughput, reduce the response time, and avoid overload of any of the resources. This paper discusses various Honey Bee Inspired Load Balancing of Tasks in Cloud Computing Environment.

- J.K. Ravan1 and S.R. Chougule, Bharati Vidyaeeith Collegg of Engineering Kolhapur, Malysia
High Data Rate UWB System Design (17-37)
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UWB technology is a serious candidate for the new emerging Wireless Personal Area Network (WPAN). In this context UWB is expected to provide very high data rates = 500Mbps for short range communication. Many physical layer schemes have been proposed to address such rates on the wireless medium. Historically pulse based systems have been first proposed as the main modulation technique for UWB. The pulse based modulations inherently occupies a very large bandwidth (several GHz), which is required due to the very low emitting power. This technique is currently considered for low data rate in the sensor network context, but seems to be discarded for high data rate transmissions. Another physical layer, Multi Band Orthogonal Frequency Division Modulation (MB-OFDM), has been proposed within the IEEE802.15.3a task group. This technique is based on the well known OFDM scheme which allows good immunity towards multipath channels. In this proposal, only a 500MHz band is used at a given time, and a frequency hopping technique spreads the signal over several GHz. Finally, Direct Sequence Spreading (DSS) has also been proposed in the UWB framework (DSUWB). In this scheme, the data are spread over few GHz of bandwidth by means of very high rate sequences. In the existing proposal, the difficulty comes with the increase of the data rate, which imposes to shorten the spreading sequences. As a consequence there is an increase of the interference which results either in performance degradation or in receiver complexity increase.

- Y.Peraiah, M.Balasubba Reddy and T.Madhu, Prakasam Engineering College, Kandukuru, India
Flexible D-STATCOM Performance as a Flexible Distributed Generation in Mitigating Faults (38-48)
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This paper proposes a flexible D-STATCOM(Distribution Static compensator) and its new controller system, that be able to both mitigate all types of faults and operate as a Distributed Generation (DG), when it supplies power to sensitive loads while the main utility source is disconnected (i.e. it is under islanded operating condition). Thus D-STATCOM operates same as a flexible DG (FDG) and consequently, it is called Flexible D-STATCOM (FD-STATCOM). This paper validates the performance of FD-STATCOM system to mitigate power quality problems and improve distribution system performance under all types of system related disturbances and system unbalanced faults, such as Line-to-Line (LL) and Double Line to Ground (DLG) faults and supplies power to sensitive loads under islanding condition. In this paper, the 12-pulse D-STATCOM configuration with IGBT is designed and the graphic based models of the D-STATCOM are developed using the PSCAD/EMTDC electromagnetic transient simulation program. The reliability and robustness of the control schemes in the system response to the voltage disturbances caused by LL and DLG faults and islanded operating condition are obviously proved in the simulation results.

- NAVNEET POPLI, PRITIKA SACHDEVA and GAUTAM BHARDAWAJ, Management Education and Research Institute, New Delhi, India
Flexible D-STATCOM Performance as a Flexible Distributed Generation in Mitigating Faults (38-48)
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We made a system of smart dust motes to inform a person about various kinds of allergies that he may be prone to if he enters a particular area in Delhi. We used, Mica Z Motes from the company ‘Crossbow’. They were placed in various areas of Delhi. All this data went to the cloud. Here we had a ‘Personal Health Record’ of a person and details like chemist shops and doctors in that area.
We also put details of online doctors whom the user can consult. Useful analysis like what precautions can he take, what is the name, phone number and shortest path to a nearby local doctor or a chemist shop etc. was derived from this application.