النشر العلمي

  • Design of a New Model for Enhancement of the Performance of Nested Mobile Networks

Recently; Network Mobility (NEMO) turns into a vital necessity for IP systems. It guarantees stable web availability amid the system versatility. Internet Engineering Task Force- Request for Comment (IETF RFC 4889) discussed route optimization in nested mobile network as an overcome of some limitations. In this paper, new model has been proposed to enhance the performance of nested networks. Through the simulation in top-level of nested achieved 5% less end to end delay and 20% more throughput than NEMO BSP. In mid-level of nested achieved 10% less end to end delay and 18% more  throughput than NEMO BSP. Finally; in third-level of nested achieved 14% less end to end delay and 15% more throughput than NEMO BSP. All of this taking into consideration that there is just three level of nesting, so when the level of nesting increased results become efficacious. This model can classify as one of best proposed solution for nested mobile networks routing limitations and can be developed to reach optimal results by using more intelligent routers.

published in IEEE

  • Design of Fault Tolerant Control System(strategy) for Two Water Tanks

In industrial processes, reliability, availability, and safety, are always in a high demand. Fault tolerant control (FTC) is fundamental these days in the automation industry.   Control systems are susceptible against breakdown because of feasible shortcomings in actuators, sensors or different parts of the system. Equipment disappointment of the dynamic system part has additionally a noteworthy economy affect for causing unpredictable plant shutdown. The primary goal of this paper is to develop a control approach/strategy to estimate errors/faults guarantee a satisfactory performance for the system under both normal and fault environments, in addition to implement the correct fault tolerant identification method that will result in a reliable process of system operation. This can occur in nonlinear water tank systems, linearized around an operation point and performed by a mathematical model. The limit check based-model fault detection was used to detect the fault .The system component work under installed controller with FTC connected to it. Then, fault is emulated and entered independently for every part. After that a controller (with FTC joined to it) is to be reconfigured, when equipment fault occurred   . The   obtained result shows that, when the faults are injected separately in system components, the tank2 levels is affected and reach below the set point (50%). Within the sight of FTC, when the faults are injected, the proportional, integral, and derivative (PID) controller reconfigure the pump flow rate and valve position to maintain tank2 level.

published in IEEE

  • Design of Fault Tolerant Control System(strategy) for Two Water Tanks

Abstract—In industrial processes, reliability, availability, and safety, are always in a high demand. Fault tolerant control (FTC) is fundamental these days in the automation industry.   Control systems are susceptible against breakdown because of feasible shortcomings in actuators, sensors or different parts of the system. Equipment disappointment of the dynamic system part has additionally a noteworthy economy affect for causing unpredictable plant shutdown. The primary goal of this paper is to develop a control approach/strategy to estimate errors/faults guarantee a satisfactory performance for the system under both normal and fault environments, in addition to implement the correct fault tolerant identification method that will result in a reliable process of system operation. This can occur in nonlinear water tank systems, linearized around an operation point and performed by a mathematical model. The limit check based-model fault detection was used to detect the fault .The system component work under installed controller with FTC connected to it. Then, fault is emulated and entered independently for every part. After that a controller (with FTC joined to it) is to be reconfigured, when equipment fault occurred   . The   obtained result shows that, when the faults are injected separately in system components, the tank2 levels is affected and reach below the set point (50%). Within the sight of FTC, when the faults are injected, the proportional, integral, and derivative (PID) controller reconfigure the pump flow rate and valve position to maintain tank2 level.

published in IEEE

  • Aridity trends amidst climate change in the eastern Nile region

Developing a rainfall-runoff relationship is a daunting hydrological task. However, this relation is largely governed by aridity, i.e. to what extent potential climatic water demand is being met in a given region (energy/water). Climate change impacts on water resources on the other hand have yet remained largely uncertain especially at a regional scale. The reviewed results of 18 recently published papers reported on the Nile basin for example have stated the overwhelmingly increasing trend in surface air temperature (SAT), mixture trends in rainfall (P) and dominant decreased runoff amounts. This presentation made use of SAT, P and potential/reference evapotranspiration (PET/ETo) for depicting the future trend in aridity (2040- 2069) and its impacts on runoff in the eastern Nile basin, compared to the 1960-1990 baseline period. Ensemble average of 16 GCMs on the basis of A2 emission scenario were collected and downscaled via the delta approach in ArcMap 10.3 environment. The Penman-Monteith based ETo (1960-1960) of 39 regional meteorological stations were extracted from the ClIMWAT in order to predict empirically future trends in ETo (0.4<R2<0.7) followed with the application of Hargreaves’s equation, temperature-based, for estimating the regional PET. Results revealed changes of 0.9 -3.1 0C for SAT, -94 -275% for P and 2-59% for ETo. While the results of three applied aridity indices were got common in future decreasing trends in arid and semi-arid areas, large areas in the region (46 - 94%) experienced decreased runoff amounts (-26%), especially in humid and sub-humid zones (Ethiopia and South Sudan). Synoptically, water supply in the region is being projected to decrease, putting more pressure on meeting water demands, irrigation water in particular. Climate change would thus have detrimental impacts on water resources, which recommended a regional cooperation in building early warning systems for operating regional dams in a win-win manner besides the efficient and sustainable use of water resources. 

published in Enhancing Flood Forecast and Early Warning in Eastern Nile Forum

  • Travel User Interest Discovery from Visual Shared Data in Social Networks

Social networks are virtual environments where users express their opinions, preferences and interests. All shared information in Social Networks like Facebook, Twitter, LinkedIn can be very useful to understand citizen’s interest. The visual shared data in social networks can express many latent knowledge about user’ interests in such topics especially the travel topic. This study aims to discover the travel user interest through the huge number of social images shared daily due to the growth of photo-taking devices in our real life. In this paper, we propose a comparison between approaches based on Feedforward learning of Convolutional Neural Network (CNN) architectures GoogleNet and VGG’19 trained on Places365 Dataset for visual object Recognition. Once objects are recognized in images, we propose an Ontology based decision system for travel user interest prediction.  In order to evaluate our Deep Neural approach, we have constructed a new database of shared images in Sudanese and Tunisian Facebook accounts. Our approaches have shown a promising result on this new database. We achieve classification rates of 93% and 87% using respectively GoogleNet and VGG’19 CNN architectures on Sudanese Facebook users compared to the opinion of the expert 78%, and classification rates of 80% and 77% using respectively GoogleNet and VGG’19 CNN architectures on Tunisian Facebook users compared to the opinion of the expert 82%. The travel interest is hard task done by expert then our approaches based on CNN, GoogleNet and VGG’19 architectures can facilitate the interest of travel topic make it easy to discover is the user interest in travel or not, other thing the GoogleNet architecture leading to a better performance and improving the classification accuracy than VGG’19.

 

published in 5th Sudan conference on computer science and information technology, Elnohoud November 2017

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