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Article
Design and Implementation of e-Shopping System Using QR Code and Smart Mobile Phone

Authors: Basma Ahmed --- Dr. Salih Al-Qaraawi
Journal: IRAQI JOURNAL OF COMPUTERS,COMMUNICATION AND CONTROL & SYSTEMS ENGINEERING المجلة العراقية لهندسة الحاسبات والاتصالات والسيطرة والنظم ISSN: 18119212 Year: 2019 Volume: 19 Issue: 3 Pages: 56-64
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

This paper presents a system that is used in one of the most important fields in our daily life, shopping and entertainment. The system exploits a mobile application, Quick Response (QR) code technique and network system. The QR tag is attached to each item in the market, while the mobile application can be installed in the Smart Phone. The smart phone is used to scan the attached QR tag and send the result to a network system and the network system will process the received data. A brief information will be brought from the local server database. However, if the customer is interested in more details, the network system brings these details from the main server and applies them on the smart phone screen. When the customer decides to buy the item, s/he can add it to the shopping list, then the system updates the bill, sends it back to the customer and to the cashier at the same time. The items will be prepared at the checkout point after payment. This system was designed, implemented, and tested practically so that the performance of that system is achieved for two main points: quick attainment of information and network congestion avoidance.


Article
Design and Implementation of Adaptive Wavelet Network PID Controller for AQM in the TCP Network

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Abstract

Abstract – Internet represents a shared resource wherein users contend for the finitenetwork bandwidth. Contention among independent user demands can result incongestion, which, in turn, leads to long queuing delays, packet losses or both.Congestion control regulates the rate at which traffic sources inject packets into anetwork to ensure high bandwidth utilization while avoiding network congestion. In thecurrent Internet, there are two mechanisms which deal with congestion; the end-to-endmechanism which is achieved by the Transmission Control Protocol (TCP) and theintermediate nodes algorithms such as Active Queue Management (AQM) in routers.In this paper, a combined model of TCP and AQM (TCP/AQM) is formulated andfirst simulated without a controller. The results show that it is unable to track the desiredqueue size. So, to get better tracking performance, an adaptive PID controller based onwavelet network (AWNPID) is used as AQM in the router queue. The non-adaptive PIDcontroller is also demonstrated, and its weakness to the network dynamic changes iscompared to the robustness of adaptive controller (AWNPID). The analytical results forlinearized TCP/AQM model are presented in MATLAB version 7.0.

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