ISSN 2253-0150

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Editor-in-Chief :
Mohamed Ridda LAOUAR

Table of contents:
Volume 3 issue 1 - Current Issue
Published: 2015


- Yan Dongning. Design Department, Politecnico di Milano. Italy

Customer Reviews Embedded E-commerce Interface Design for User Decision Improvement
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Customer reviews in E-commerce are playing an important and unique role in user purchase decision. However, the overwhelming amount of reviews and inconsistent writing style require significant effort to read and tend to let important information slip away. Grounded on that the understanding of decision making behavior is crucial for designing effective information display, we conducted a formative study to investigate consumer decision making behavior in the environment of hotel online booking. Based on the extracted requirements for the process of narrowing down options, we designed two alternative opinion attributes (i.e. attributes extracted from customer reviews) embedded filter interfaces, respectively called slider-filter and checkbox-filter. Then we performed a user study to compare the two designs empirically. It turned out the effectiveness of incorporating opinion attributes in filter and verified the slider-filter, visualizing distribution via bars and attribute correlation via simultaneous change, achieved significantly higher user assessments in terms of perceived decision accuracy, cognitive effort, satisfaction and intention to use in the future.

- Nikolajs Bogdanovs, Elans Grabs and Ernests Petersons
Riga Technical University. Latvia

Software Implementation of Real-time Discrete Wavelet Transform Algorithm with Filter Banks for Network Traffic Parameters Estimation
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This article describes real-time discrete wavelet transform algorithm implementation for high-level programming language. The article describes multiscale transform algorithms both for direct discrete wavelet transform and inverse discrete wavelet transform. This algorithm has been implemented in C++ programming language and tested with Raspberry Pi microprocessor system. This article proposes the improved delay line algorithm without full shifting of register. New algorithm requires single reading operation, single writing operation and one division calculation for any length of delay line. The article includes experimental measurements of processing time on Raspberry Pi for various scale numbers. The algorithm described in this article can be used with any software tool capable of using high level programming language, for example Matlab, Octave, Opnet, as well as microprocessors in communications devices, such as routers, switches and access points. This is the main purpose – to create algorithm which is not tied strictly to hardware implementation but also, nonetheless, provides real-time discrete wavelet analysis capability.

- Wenrui Zhong, Wenlin Bai, Lemen Chao, Hepu Deng and Xiaomi An
Renmin University of China, Beijing, China.

Public Value of E-Government in China: an Empirical Analysis
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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.

- Vimala Nunavath, Andreas Prinz.
University of Agder, Norway

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Effective management of emergency requires timely information sharing and coordinated decision making at all levels of the emergency. In emergency management, decision making depends on number of factors such as stress, information overload, unstructured data from different sources, data in different formats, and in different databases. For efficient decision making in emergency management, data from different databases has to be integrated. In this paper, we propose a framework for data integration. The proposed framework ensures better decision making during emergency.

- MATHEW MILES. McKay Library, Brigham Young University - Idaho, USA.

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Web2py is a free and open source web application framework built in Python and designed by Massimo Di Pierro. The goal of the framework is to make web development easier by focusing on three main goals: ease of use; rapid development; and security. Web2py follows a strict MVC framework where the controls and web templates are all written in pure python. No additional templating language is required. Many of the features most web applications require are built into every Web2py application such as user, group and permissions tables and a menuing structure. The DAL or Database Abstraction Layer allows the user to create schema definitions, which are then translated into database tables in the target database, and form widgets that are serialized in html templates. The generated forms provide field validation automatically and the DAL blocks malicious SQL Injections. Web2py was also built with Internationalization features that provide a structured way to deliver applications in a variety of languages.