Inter national J our nal of Electrical and Computer Engineering (IJECE) V ol. 8, No. 5, October 2018, pp. 3250 3258 ISSN: 2088-8708 3250       I ns t it u t e  o f  A d v a nce d  Eng ine e r i ng  a nd  S cie nce   w     w     w       i                       l       c       m     W iRoT ip: an IoT -based W ir eles s Sensor Netw ork f or W ater Pipeline Monitoring F atma Karray 1,2 , Mariem T riki 2 , Mohamed W assim Jmal 1,2 , Mohamed Abid 1,2 , and Abdulfattah M. Obeid 3 1 Computer and Embedded System laboratory , National Engineering School of Sf ax, Uni v ersity of Sf ax, Sf ax, T unisia 2 Digital Research Center of Sf ax, T echnopole of Sf ax, Sf ax, T unisia 3 National Center for Electronics and Photonics T echnology , King Abdulaziz City for Science and T echnology (KA CST), Riyadh, Saudi Arabia Article Inf o Article history: Recei v ed October 31, 2017 Re vised June 29, 2018 Accepted July 14, 2018 K eyw ord: W ireless Sensor Netw ork Internet of Things Node Design Leak Detection W ater Pipeline Monitoring ABSTRA CT One of the k e y components of the Internet of Things (IoT) is the W ire less Sensor Netw ork (WSN). WSN is an ef fecti v e and ef ficient technology . It consists of senor nodes; smart de vic es that allo ws data collection and pre-processing wirelessly from real w orld. Ho we v er , issues related to po wer consumption and computational per - formance still persist in classical wireless nodes since po wer is not al w ays a v ailable in application lik e pipeline monitoring. Moreo v er , the y could not be usually suitable and adequate for this kind of application due to memory shortage and performance constraints. Designing ne w IoT WSN system that matches the application specific re- quirements is e xtremely important. In this paper , we present W iRoT i p, a WSN node prototype for w ater pipeli ne application. An e xperimental and a comparati v e studies ha v e been performed for the dif fe rent node’ s components to achie v e a final adequate design. Copyright © 2018 Institute of Advanced Engineering and Science . All rights r eserved. Corresponding A uthor: F atma Karray Computer Science department Sf ax,T unisia +21644295345 karray .f atma.enis@gmail.com 1. INTR ODUCTION Internet of Things (IoT) allo ws us to transform the w ay of our perception and our interaction with the real w orld. It w ould mak e applications g ain more ef ficienc y , harness intelligence and get better accurac y by linking the ph ysical objects to the information netw ork. It of fers also a promising solution of v arious e xisting industrial systems such as w ater transportation systems, manuf acturing systems, etc [1]. W ireless Sensor Netw orks (WSNs) play a major role in this technology as intermediate to shape the ph ysical w orld to human perception. No w adays, WSN’ applications are getting more and more attention from the in- dustrial and the academic circles [2] [3] [4]. One of the most crucial application of WSN is w ater pipeline monitoring since w orries about potable w ater ha v e became more and more justified [5]. In that line, man y studies ha v e been made to propose solutions for leak detection and location in w ater pipeline. Most of them are focusing on the softw are aspect such as leak detection algorithms, communication protocols etc. Fe w others are tar geting the hardw are parts such as sensors, WSN platforms, etc [6]. Ho we v er , the most common concern of WSN is po wer consumption since it determines the lifespan of the whole application. The battery- p o we red sensors are responsible for g athering information and detecting leaks in order to react at the appropriate time. Therefore, in addition to ener gy preserv ation, enhancing the sensing capabilities by ameliorating the output signal of these sensors and treating their information is quite important when dealing with WSNs. J ournal Homepage: http://iaescor e .com/journals/inde x.php/IJECE       I ns t it u t e  o f  A d v a nce d  Eng ine e r i ng  a nd  S cie nce   w     w     w       i                       l       c       m     DOI:  10.11591/ijece.v8i5.pp3250-3258 Evaluation Warning : The document was created with Spire.PDF for Python.
IJECE ISSN: 2088-8708 3251 IoT is not e xplored e xtensi v ely in w ater pipeline monitoring. Fe w w orks e xist for w ater management in general. F or instance, the authors in [7] sho w the importance of IoT for w ater resource engineering. Some literature w orks are reported in this w ork. In [8], the authors describe t he importance of IoT’ s usage for w ater manage- ment companies and the w ay of IoT inte gration for this management. Mohod [9] in the same w ay af firms the feasibility of IoT inte gration for Dam and W ater Management. The authors in [10] present an IoT wireless sensor node for leak detection and w ater quality monitoring. The prototype consists of a microcontroller , a PH sensor , a vibration sensor , a flo w sensor and a le v el sensor . Dhobale et al. [11] propose an IoT WSN system for w ater supply management. This system serv es to automatically measure w ater le v el in dam and w ater flo w rate. The sensor node is based on w ater flo w sensor , Arduino board, ultrasound sensor and GSM module. The authors in [12] present a WSN prototype for w aterw aste monitoring on IoT . The proposed design consists of a W ireless sensor node, a g ate w ay node, a SMS-g ate w ay and IoT Cloud platform. The authors describe The implementations of each part. The sensor node is composed of an Arduino Me g a board, a wireless commu- nication module, a sensor interf ace, a PH sensor , a conducti vity sensor and a dissolv ed oxygen sensor . There is no po wer consumption or performance e v aluation in the proposal. Nguyen et al. [13] describe an IoT WSN node for En vironment monitori n g. The node consists of nRF51822 System on Chip (SoC) that contains an ARM corte x M0 microcontroller and an ener gy harv esting module. Y ang et al. [14] propose a WSN for w ater consumption monitoring at a household using IoT concept. Ho we v er , these w orks are considered as attempts to use the IoT concept for w ater management systems and further impro v ements are needed especially in terms of performance and ener gy optimization. The object of this w ork is to propose and e v aluate W iRoT ip, an IoT ener gy-ef ficient WSN p r ototype for leak detection in w ater pipelines. Moreo v er , we propose dif ferent circuits of signal conditioning as well as a h ybrid leak detection algorithm based on kalman filter used in data processing. This paper is or g anized as follo ws: In section 2, we present the W iRoT ip. W e introduce the proposed IoT architecture of the system, the softw are algorithm and the node design. W e dra w the e xperimental results in section 3 to finally finish with a conclusion and further future w ork in section 4. 2. WIR O TIP SYSTEM DESIGN In this section, we will detail our proposed solution. The architecture of IoT system will be pres ented. Softw are and hardw are implementations of the sensor node will be described. 2.1. IoT structur e of the pr oposed system The W iRoT ip system is designed for pressurized pipes. The proposed IoT architecture consist s of multi-layers that interact and cooperate to detect and to locate leaks in w ater pipelines. Figure 1 sho ws the components of dif ferent layers. The First lay er is WSN layer in which the data is collected and pre-processed locally (not in the serv er). In f act, a pre-processing in node could sa v e ener gy dissipated in frequent data transmission or sending useless information. Hence, a h ybrid leak detection m ethod based on Kalman filter (HLDKF) is implemented to detect leaks in w ater pipes. The sensor node in our case allo ws dif ferent tasks lik e data filtering, data processing, data compressing, data fusion, dat a aggre g ation, etc. After softw are implementation, a hardw are e xperimental study is performed to select and design the dif ferent components of the node in subsection 2.3.. The second lay er is the netw orking, the service and the storage layer . In this layer , the communication between nodes, g ate w ays and the base station is performed. The sensors are fix ed in sleep mode and get data e v ery 8 hours. The HLDF is run to filter data and to test leak occurrence. When a leak occurs, the data is collected with a high sampling rate. The compressed data and leak information are firstly forw arded from nodes to cluster heads, in which the leak position is calculated, and then to the cloud. The final lay er is the application layer in which the user could interact with the sensors’ information. In this step, v arious analyses are performed and visualized online. An interacti v e user interf ace is de v eloped to access the pipelines information. In the application, users are allo wed to access to leaks information, statistics, graphs, pipeline state and netw ork information. 2.2. W iRoT ip Leak detection and data filtering module Kalman filter (KF) [15] is an ef cient predicti v e and estimator . The usage of such algorithm j ointly with WSN has not been e xplored yet for w ater pipeline application to the best of our kno wledge. Ho we v er , some papers ha v e used KF for lea k detection. F or e xample, Benkherouf in 1988 proposes an Extended KF Evaluation Warning : The document was created with Spire.PDF for Python.
3252 ISSN: 2088-8708 Figure 1. W iRoT ip IoT architecture (EKF) in the conte xt of pipeline monitoring [16]. The authors in [17] suggest a linear KF for leak detection based on pressure and flo w measurements. The y s up pos e that in a gi v en time step, the measurement state is similar with the one of pre vious week. Jung et al [18] propose a leak detection method based on a statistical process control and a KF to detect b ursts in pipelines. Ho we v er , these w orks do not e xplore the KF in the conte xt of WSN-WPM application. W e implement a HLDKF to perform data filtering and leak detection in w ater pipes. Figure ?? sho ws The flo wchart of the algorithm. KF is a recursi v e data processing algorithm for dynamic systems. It emplo ys a set of mathematical equations to produce an optimal estimation of the system [19]. This algorithm with be used in the ne xt section for e v aluating the performance of the processing module. 2.3. W iRoT ip Node design T o design an ener gy-ef ficient node and to perform a good choice of the node components, a t heoretical and e xperimental study about the node components is necessary . A typical sensor node consists of four modules [20]: The pr ocessing unit: F or the processing unit, we ha v e used an Arduino Uno [21]. This platfor m is open hard and f acilitated hardw are understanding. It allo ws also easy inte gration of sensors and communica- tion de vices (transcei v ers). The communication unit: This unit is composed of a transcei v er that transmits and recei v es data wire- lessly . A nRF24l01 is used for this unit as sho wn in Figure 2. The nRF24l01 [22] is a 2.4 GHz Radio T ranscei v er . The choice of this transcei v er is due to its lo w po wer , its lo w cost and its compatibility with Arduino board, yet, for final prototype or product, nRF24L01+ or the SoCs nRF24LE1 or nRF24LU1+ are more suitable [22]. F or the g ate w ay , we ha v e used the Ethernet communication. Ethernet (also kno wn as the IEEE 802.3 standard) [23] is a standard for data transmission for local area netw ork. W e ha v e used for our prototypes Arduino Ethernet Shield V1 [24] to connect the Arduino to the internet (g ate w ay) as sho wn in Figure 2. The acquisition of W ifi shield w as not possible. That is wh y , we ha v e used Ethernet shield. The sensing unit: This unit is in char ge of g athering data from ph ysical en vironment. This part is v ery crucial as the accurac y of an y sensor will af fect the all system (to design sturdy system). Press ure and IJECE V ol. 8, No. 5, October 2018: 3250 3258 Evaluation Warning : The document was created with Spire.PDF for Python.
IJECE ISSN: 2088-8708 3253 Figure 2. Ethernet T ranscei v er connected to Arduino Uno board Flo w sensors are used as inputs of the HLDKF as detailed belo w: 1. YF-S201 Hall Effect W ater Flo w Sensor: This sens or is used to measure the flo w v ariations in w ater pipes [25]. It is a destructi v e sensor aligned with the w ater pipe. The accurac y of this sensor is about +/- 10 % and the flo w rate v aries from 1 to 30 liters per minute. This sensor is widely emplo yed due to its puls e-based mechanism that allo ws lo w po wer consumption. Figure 3 sho ws the w ay in which this sensor is attached to the pipe and to the sensor node. Figure 3. YF-S201 Hall Ef fect W ater Flo w Sensor attached to our demonstrator and to the sensor node 2. F or ce Sensiti v e Resistor (FSR) sensor: FSR is an analog sensor used to measure pressure in w ater pipes. It is a polymer thick film de vice characterized by its easy-to-use and lo w cost [26]. Figure 4 illustrates the dif ferent parts of the sensor . When a force/pressure is e x ercised to the sensor , the resistor element is deformed and the air is pushed from the spacer . The accurac y of sensor is + = 10 %. Figure 4. FSR sensor In our case, the sensor is attached to the outside of the pipeline and fix ed with a join. The pipeline pressure produces a contact force between the pipe and the join. When a leak occurs, i t causes pressure v ariations which af fect the contact force. The po wer management unit manages and pro vides ener gy to the all sensor node components. In this paper , we ha v e not w ork ed on this unit. Ho we v er , some ener gy optimization techni ques are used to sa v e the all po wer of the node. This study is v ery important to master the hardw are part and select the best components of the IoT node. Evaluation Warning : The document was created with Spire.PDF for Python.
3254 ISSN: 2088-8708 3. RESUL TS AND AN AL YSIS The W iRoT ip prototype is tested using a demonstrator installed in our research center [27]. Figure 5 sho ws an almost rectangular section composed of 25 m polyeth ylene pipes. These pipes ha v e 32 mm as an Figure 5. W iRoT ip T estbed e xternal diameter . The y support up to 12 bar of pressure. The choice of this sort of pipes is thanks to their lo w cost, their resistance and insensiti vity to chemical and electrical corrosion. Furthermore, the y are used in the real distrib ution systems of our country . More general, the use of plastic pipes has increasingly widespread all o v er the w orld. The setup consists also of tw o v alv es in inlet and outlet points in order to v ary the users demands by v arying the pressure. A 1000 m 3 reserv oir is used as a w ater source. T o control the inlet and outlet w ater , we emplo y tw o flo w meters. As the pipes are made at the same le v el, the w ater is mo ving along the pipes by an electrical pump with 1 hp motor pro viding up to 4 bar when the output v alv e is closed and up to 2.5 bar in open circuit. The supports are designed to ha v e v ariable heights that we will e xplore in the future to see the ef fect of this v ariation on the pressure and to test our algorithm in v aried conditions. Finally , The leaks are induced using tw o g arden taps. This demonstrator is used to test the proposed sensor node. The prototype is made up of the Arduino board, the nRF24l01 transcei v er , the flo w sensor and the relay . T able 1 il lustrates also the po wer consumption distrib ution of the node prototype. In this table, each of t he node components is shut do wn to see it ef fect in the whole po wer of the node. T able 1. Po wer distrib ution in the Arduino-nRF24l01 prototype Arduino Relay Flo w sensor algorithm nRF24l01 Current (mA) Po wer (mW) on on on HLDKF Tx (11 mA) 85.47 396.3 on on on HLDKF Rx (18 mA) 92.47 419.4 on on Of f HLDKF Idle (2 mA) 34 381.5 on of f of f HLDKF of f 32 160 sleep ( PWR DO WN) of f of f HLDKF of f 26 130 T able 2 illustrates the po wer consumption of the sensors used for W iRoT ip. These sensors are lo w po wer and the y k ept shut do wn as longer as possible to sa v e the po wer of the node. T able 3 represents the po wer distrib ution analysis of the g ate w ay prototype which is based on Ethernet shield V1. W e note that the Ethernet module has high po wer consumption. Ho we v er , it is used due to material con- straints. Figure 6 summarize the po wer profiles of W iRoT ip node and Gate w ay . W e remember that thi s proposal is a prototype for more ener gy sa ving a PCB board needs to be designed. Moreo v er , due to the lack of information of po wer consumption in the other approaches, we implement our algorithm in tw o other sensor nodes: Arduino Due and MKR1000 to compare our w ork with others as repre- IJECE V ol. 8, No. 5, October 2018: 3250 3258 Evaluation Warning : The document was created with Spire.PDF for Python.
IJECE ISSN: 2088-8708 3255 T able 2. Experimental Po wer Consumption of each Sensor Sensor V oltage (V) Curr ent (mA) P o wer (mW) YF-S201 sensor 5 2.47 12.35 FSR 5 2.3 11.5 T able 3. Po wer distrib ution in the Arduino-Ethernet prototype Arduino Relay Ethernet mode Current (mA) Po wer (mW) on on Tx (167 mA) 239 1195 on on Rx (160 mA) 232 1160 on on Idle (150 mA) 222 1110 Figure 6. W iRoT ip Po wer Consumption Summary sented in T able 4. As we can see, in the T able 4, our proposal still ha v e the lo west po wer consumption while impro v ements still needed in this respect. T able 4. Comparison of W iRoT ip with other Approaches T ime ( s) Po wer (mW) W iRoT ip 80 187.5 Arduino Due 30 557 MKR1000 40 600.5 4. CONCLUSION In this paper , we de v elop an IoT WSN node prototype for w ater pipeline monitoring appl ication. V arious tests and implementations ha v e been performed for dif ferent units to design an ener gy a w are reliable system. The sensing unit w as a crucial unit. In f act, calibrations and amplifier ha v e been added to adjust the signal coming from polyeth yle ne pipes. Communic ation and po wer management techniques ha v e bee n also e v aluated. All this w ork has permit us to design and e v aluate W iRoT ip node. As future w ork, a PCB board will be de v eloped to get our o wn ultra lo w po wer product with sensor board e xtension. T ests and e xperiments will be performed not only in the demonstrator b ut also in real field. Evaluation Warning : The document was created with Spire.PDF for Python.
3256 ISSN: 2088-8708 A CKNO WLEDGMENT The authors w ould lik e to thank the King Abdulaziz City for Science and T echnology (KA CST) which supports this w ork under a research grant (project no. 35/1012). REFERENCES [1] A. Rghioui and A. Oumnad, “Internet of things: Surv e ys for measuring human acti vities from e v ery- where, International J ournal of Electrical and Computer Engineering (IJECE) , v ol. 7, no. 5, p. 2474, 2017. [2] C.-Y . Chong and S. P . K umar , “Sensor netw orks: e v olution, opportunities, and challenges, Pr oceedings of the IEEE , v ol. 91, no. 8, pp. 1247–1256, 2003. [3] A. A. Jaber and R. Bick er , “Design of a wireless sensor node for vibration monitoring of industrial ma- chinery , International J ournal of Electrical and Computer Engineering , v ol. 6, no. 2, p. 639, 2016. [4] H. Sayuti, R. Rashid, N. A. Latif f, M. A. Rahim, A. Abdul, M. Sarijari , and N. Ghazali, “Smart home and ambient assisted li ving based on the internet of things, International J ournal of Electrical and Computer Engineering , v ol. 7, no. 3, p. 1480, 2017. [5] M. M. Mek onnen and A. Y . Hoekstra, “F our billion people f acing se v ere w ater scarcity , Science ad- vances , v ol. 2, no. 2, p. e1500323, 2016. [6] F . Karray , A. Garcia-Ortiz, M. W . Jmal, A. M. Obeid, and M. Abid, “Earnpipe: A testbed for smart w ater pipeline monitoring using wireless sensor netw ork, Pr ocedia Computer Science , v ol. 96, pp. 285–294, 2016. [7] S. Deshmukh and P . Barapatr , “Internet of things based system for w ater resource engineering, in Em- anations in Modern T ec hnolo gy and Engineering (ICEMTE), 2017 International Confer ence on , v ol. 5. IEEE, 2017, pp. 240–242. [8] T . Robles, R. Alcarria, D. M. de Andr ´ es, M. Na v arro, R. Calero, S. Iglesias, and M. L ´ opez, An iot based reference architecture for smart w ater management processes, J oWU A , v ol. 6, no. 1, pp. 4–23, 2015. [9] N. Mohod, “Usability of internet of things [iot] for dam safety and w ater management, International J ournal of Resear c h in Advent T ec hnolo gy , v ol. 5, no. 1, pp. 29–30, 2017. [10] S. Ezhilv anji and S. Malark odi, An ef ficient w ater distrib ution system for india using iot, International Inno vative Resear c h J ournal of Engineering and T ec hnolo gy , 2017. [11] G. S. P . G. P . J. H. K. A. Dhobale, Kiran M. and U. A. Mande, “Iot based smart w ater supply management system, Advanced Resear c h in Computer and Communication Engineering , v ol. 6, no. 3, 2017. [12] Y . Zakaria and K. Michael, An inte grated cloud-based wireless sensor netw ork for monitoring industrial w aste w ater dischar ged into w ater sources, W ir eless Sensor Network , v ol. 9, no. 08, p. 290, 2017. [13] C. M. Nguyen, J. Mays, D. Plesa, S. Rao, M. Nguyen, and J.-C. Chiao, “W ireless sensor nodes for en vironmental monitoring in internet of things, in Micr owave Symposium (IMS), 2015 IEEE MTT -S International . IEEE, 2015, pp. 1–4. [14] S.-H. Y ang, X. Chen, X. Chen, L. Y ang, B. Chao, and J. Cao, A case study of internet of things: A wireless household w ater consumption monitoring system, in Internet of Things (WF-IoT), 2015 IEEE 2nd W orld F orum on . IEEE, 2015, pp. 681–686. [15] H. Alra w ashdeh and J. A. Sumadu, “The kalman filter performance for dynamic change in system parameters, International J ournal of Electrical and Computer Engineering (IJECE) , v ol. 3, no. 6, pp. 713–723, 2013. [Online]. A v ailable: http://iaesjournal.com/online/inde x.php/IJECE/article/vie w/3857 [16] A. Benkherouf and A. Allidina, “Leak detection and location in g as pipelines, in IEE Pr oceedings D (Contr ol Theory and Applications) , v ol. 135. IET , 1988, pp. 142–148. [17] G. Y e and R. A. Fenner , “Kalman filtering of h ydraulic measurements for b urst detection in w ater distri- b ution systems, J ournal of pipeline systems engineering and pr actice , v ol. 2, no. 1, pp. 14–22, 2010. [18] D. Jung and K. Lanse y , “W ater distrib ution system b urst detection using a nonli near kalman filter , J ournal of W ater Resour ces Planning and Mana g ement , v ol. 141, no. 5, p. 04014070, 2014. [19] R. E. Kalman, A ne w approach to linear filtering and prediction problems , J ournal of basic Engineering , v ol. 82, no. 1, pp. 35–45, 1960. [20] F . Karray , W . M. Jmal, M. Abid, D. Houssaini, A. M. Obeid, S. M. Qasim, and M. S. BenSaleh, Archi- tecture of wireless sensor nodes for w ater monitoring applications: From microcontroller -based system to soc solut ions, in En vir onmental Instrumentation and Measur ements (IMEK O), 2014 5th IMEK O TC19 Symposium on , 2014, pp. 20–24. [21] Arduino. Arduino/genuino uno description. [Online]. A v ailable: IJECE V ol. 8, No. 5, October 2018: 3250 3258 Evaluation Warning : The document was created with Spire.PDF for Python.
IJECE ISSN: 2088-8708 3257 https://www .arduino.cc/en/Main/ArduinoBoardUno [22] nRF24L01 Single Chip 2.4GHz T r ansceiver Pr oduct Specification , Nordic semiconductor , Jul. 2007. [23] Z. Lin and S. Pearson, An inside look at industrial ethernet communication protocols, T e xas Instruments, White P aper , 2013. [24] Arduino. Arduino ethernet shiel d v1. [Online]. A v ailable: https://www .arduino.cc/en/Main/ArduinoEthernetShieldV1 [25] Data-sheet,Pr odcut Intr oduction , YIF A the plastics Ltd. [26] F . S. R. A. O. of the T echnology , “Data-sheet, Interlink Electr onics . [27] Digital research centre of sf ax. [Online]. A v ailable: http://www .crns.rnrt.tn/ Evaluation Warning : The document was created with Spire.PDF for Python.
3258 ISSN: 2088-8708 BIOGRAPHIES OF A UTHORS F atma Karray is a Phd student at the Computer and Embedded Systems (CES) laboratory and at the Digital Research Center of Sf ax, T unisia (2014). She has recei v ed the Engineering de gree in embedded systems from the National School of Engineer of Sf ax, T unisia in 2013. Her current research interests are in the fields of embedded systems, W irel ess Sensor Netw orks, Signal processing, IoT applications, Smart Infrastructures monitoring, System on Chip design and Lo w po wer design. F atma Karray serv es as a re vi e wer in international journals and c onferences and as or g anizer in national e v ents and w orkshops. Mariam T riki Electrical engineer from the national school of engineering of Sf ax , T unisia (2016). She specialized in electronics and ne w technologies. She w ork ed as an RD engineer at the Computer and Embedded Systems Laboratory (CES labs) and at the Digital Research Center of Sf ax. She is passionate about IoTs, sensors, analog systems and electronic de vices. Mohamed W assim Jmal is an Associate Professor at the Higher Institute of Applied Sciences and T ecnology of Gafsa, T unisia since 2012. Hi s research acti vity is conducted within CES Laboratory . He has recei v ed the Engineering de gree in Electrical Engineering, from the National Engineering School of Sf ax in 2005 and the Master de gree in Automat ic and Industrial Informatics, from the same Engineering School, in 2007. He got the PhD in Electrical Engineering in 2013. His current research interests are in the field of W ireless Sensor Netw orks (WSN) and the Embedded Systems. The y are focused on the implementation of wireless s ensor netw orks applications in Reconfigurable System. He has se v eral publications in man y conferences and Journals. Mohamed W assim JMAL serv ed in national and international conference or g anization: IDT , ICM, TWESD, SensorNets. Mohamed Abid is Head of ”Computer Em bedded System” laboratory CES-ENIS, T unisia. He is w orking no w as a Professor at the Engineering National School of Sf ax (ENIS), Uni v ersity of Sf ax, T unisia. He recei v ed the PhD de gree from the National Institute of Applied Sciences, T oulouse (France) in 1989 and the ”thse d’tat” de gree from the National School of Engineering of T unis (T unisia) in 2000 in the area of Computer Engineering and Microelectronics. His current research interests include hardw are/softw are co-design, System on Chip, Reconfigurable System, and Em- bedded System, biometric, etc. He has also in v estig ated the design and implementation issues of FPGA embedded systems. Dr . Abid is joint coordinator or an acti v e member of se v eral Interna- tional Research and Inno v ation projects. He w as Supervisor or Co-supervisor of more than 50 PhD doctors. He is author or co-author of more than 150 publications in Journals and of more than 300 papers in international conferences. He is also author or c o- author of man y guest’ s papers, Joint author of man y book’ s chapters. Dr . Abid has serv ed a lso as Guest professor at se v eral international uni v ersities and as a Consultant to research and de v elopment in T elnet Incorporation. Abdulfattah M. Obeid is currently general manager at Saudi T echnology De v elopment and In v est- ment Compan y (T A QNIA)and associated profess or at National Center for Electronics and Photonics T echnology , King Abdulaziz City for Science and T echnology (KA CST), Riyadh, Saudi Arabia. He has recei v ed the Bachelor of Science (B Sc) Electrical, Electronics and Communications Engineer - ing in King Saud Uni v ersity in 1994, the Master de gree of Electrical Engineering in Michig an State Uni v ersity , East Lansi ng, MI, USA in 1999 and the PhD de gree in Electrical Engineering and In- formation T echnology , TU-Darmstadt, Darmstadt, German y in 2006. His current research interests are in the fields of embedded systems, W ireless Sensor Netw orks, System on Chip design and Lo w po wer design. Obeid serv es as a re vie wer in international journals and conferences and as or g anizer in international conferences and w orkshops. IJECE V ol. 8, No. 5, October 2018: 3250 3258 Evaluation Warning : The document was created with Spire.PDF for Python.