Hala Jamal Hadi; Salih Mahdi Al-Qaraawi
Abstract
Recently, the automatic movement of mobile robots has played a very important role inthe advancement of technology. Automated mobile robot path determination is one of the mostimportant challenges in the science of technology. This paper proposed a path planning method forwheeled mobile robots based ...
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Recently, the automatic movement of mobile robots has played a very important role inthe advancement of technology. Automated mobile robot path determination is one of the mostimportant challenges in the science of technology. This paper proposed a path planning method forwheeled mobile robots based on a real time calculation of a predefined distance on a certain map toenable the mobile robot to navigate at indoor areas according to the calculated distances and angleson the paths. The proposed system uses two wheels’ car as a prototype with two optical encoders todetermine the number of wheel’s rotations, in order to calculate the needed distances and anglesbetween two points on the navigation path. The system was controlled by a microcomputer RaspberryPi, programmed using python programming language. The experimental results show an accuratedistances and angles measurement for the navigation under a suitable condition.
Basma Ahmed; Salih Mahdi Al-Qaraawi
Abstract
This paper presents a system that is used in one of the most important fields inour daily life, shopping and entertainment. The system exploits a mobile application, QuickResponse (QR) code technique and network system. The QR tag is attached to each item inthe market, while the mobile application can ...
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This paper presents a system that is used in one of the most important fields inour daily life, shopping and entertainment. The system exploits a mobile application, QuickResponse (QR) code technique and network system. The QR tag is attached to each item inthe market, while the mobile application can be installed in the Smart Phone. The smartphone is used to scan the attached QR tag and send the result to a network system and thenetwork system will process the received data. A brief information will be brought from thelocal server database. However, if the customer is interested in more details, the networksystem brings these details from the main server and applies them on the smart phonescreen. When the customer decides to buy the item, s/he can add it to the shopping list, thenthe system updates the bill, sends it back to the customer and to the cashier at the sametime. The items will be prepared at the checkout point after payment. This system wasdesigned, implemented, and tested practically so that the performance of that system isachieved for two main points: quick attainment of information and network congestionavoidance
Reem Razzaq Abdul Hussein; Muayad Sadik Croock; Salih Mahdi Al-Qaraawi
Volume 19, Issue 2 , April 2019, , Page 1-8
Abstract
This research deals with the using of correlation measurement that leads todescribing the degree of relationship between variables, quantities or qualities. Therefore,we implement a simple correlation coefficient and conditional correlation to introduce aregular vine copula, which gives different tree ...
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This research deals with the using of correlation measurement that leads todescribing the degree of relationship between variables, quantities or qualities. Therefore,we implement a simple correlation coefficient and conditional correlation to introduce aregular vine copula, which gives different tree structures. Two methods to select treestructures are introduced. The first one adopts the Partial Correlation Constant (PCC)with constant, while the second method depends on the estimation of summation pathway.The proposed method makes modification on Diβmann’s algorithm to increase thedependency on each level of the tree using rank correlation measurement. Both methodsare adopted to construct the best model with more than three dimensions based on theavailable label crime dataset in Iraq. The selected model is used for selecting the suitabletree model and generating a decision with the low dimensionality of variables.
Dr. Farooq Al- doraiee; Salih Al-Qaraawi; Hassan J. Hassan
Volume 13, Issue 1 , April 2013, , Page 9-17
Abstract
Abstract – Internet represents a shared resource wherein users contend for the finite
network bandwidth. Contention among independent user demands can result in
congestion, which, in turn, leads to long queuing delays, packet losses or both.
Congestion control regulates the rate at which traffic ...
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Abstract – Internet represents a shared resource wherein users contend for the finite
network bandwidth. Contention among independent user demands can result in
congestion, which, in turn, leads to long queuing delays, packet losses or both.
Congestion control regulates the rate at which traffic sources inject packets into a
network to ensure high bandwidth utilization while avoiding network congestion. In the
current Internet, there are two mechanisms which deal with congestion; the end-to-end
mechanism which is achieved by the Transmission Control Protocol (TCP) and the
intermediate nodes algorithms such as Active Queue Management (AQM) in routers.
In this paper, a combined model of TCP and AQM (TCP/AQM) is formulated and
first simulated without a controller. The results show that it is unable to track the desired
queue size. So, to get better tracking performance, an adaptive PID controller based on
wavelet network (AWNPID) is used as AQM in the router queue. The non-adaptive PID
controller is also demonstrated, and its weakness to the network dynamic changes is
compared to the robustness of adaptive controller (AWNPID). The analytical results for
linearized TCP/AQM model are presented in MATLAB version 7.0.
