A comparative study of thermal properties of similar Zn-free and Zn-doped thin films

Karem Boubaker 한국물리학회 2009 Current Applied Physics Vol.9 No.6

Zn-doped sprayed thin films have been grown on binary In2S3 substrates under the mean temperature (Td = 320 ℃). Further studies Amlouk et al. [M. Amlouk, M.A. Ben Said, N. Kamoun, S. Belgacem, N. Brunet, D. Barjon, Japan Journal of Applied Physics 38 (1999) 26-30]; Lazzez et al. [S. Lazzez, K. Boubaker, M. Amlouk, Indirect measurement of Zn-doped In2S3 NANO films SPECIFIC heat capacity, International Journal of Nanoscience 7 (2008) 1–5.]; Lazzez et al. [S. Lazzez, K. Boubaker, T. Ben Nasrallah, M. Mnari, R. Chtourou, M. Amlouk, S. Belgacem, Structural and optoelectronic properties of InZnS sprayed layers, Acta Physica Polonica A 114 (2008) 869–880.] investigated the band gap shift, the structural and morphological changes induced by this doping. In this study, a quantitative comparative evaluation of the thermal properties of the as-grown layers is carried out. The obtained results, parallel to further information, plea for the superior thermal efficiency of the recently proposed Zn-doped ternary compounds. Zn-doped sprayed thin films have been grown on binary In2S3 substrates under the mean temperature (Td = 320 ℃). Further studies Amlouk et al. [M. Amlouk, M.A. Ben Said, N. Kamoun, S. Belgacem, N. Brunet, D. Barjon, Japan Journal of Applied Physics 38 (1999) 26-30]; Lazzez et al. [S. Lazzez, K. Boubaker, M. Amlouk, Indirect measurement of Zn-doped In2S3 NANO films SPECIFIC heat capacity, International Journal of Nanoscience 7 (2008) 1–5.]; Lazzez et al. [S. Lazzez, K. Boubaker, T. Ben Nasrallah, M. Mnari, R. Chtourou, M. Amlouk, S. Belgacem, Structural and optoelectronic properties of InZnS sprayed layers, Acta Physica Polonica A 114 (2008) 869–880.] investigated the band gap shift, the structural and morphological changes induced by this doping. In this study, a quantitative comparative evaluation of the thermal properties of the as-grown layers is carried out. The obtained results, parallel to further information, plea for the superior thermal efficiency of the recently proposed Zn-doped ternary compounds.

A solution to Bloch NMR flow equations for the analysis of hemodynamic functions of blood flow system using m-Boubaker polynomials

O. Bamidele Awojoyogbe,Karem Boubaker 한국물리학회 2009 Current Applied Physics Vol.9 No.1

This paper proposes a solution to Bloch NMR flow equations in biomedical fluid dynamics using a new set of real polynomials. In fact, the authors conjugated their efforts in order to take benefit from similarities between independent Bloch NMR flow equations yielded by a recent study and the newly proposed characteristic differential equation of the m-Boubaker polynomials. The main goal of this study is to establish a methodology of using mathematical techniques so that the accurate measurement of blood flow in human physiological and pathological conditions can be carried out non-invasively and becomes simple to implement in medical clinics. Specifically, the polynomial solutions of the derived Bloch NMR equation are obtained for use in biomedical fluid dynamics. The polynomials represent the T2-weighted NMR transverse magnetization and signals obtained in terms of Boubaker polynomials, which can be an attractive mathematical tool for simple and accurate analysis of hemodynamic functions of blood flow system. The solutions provide an analytic way to interpret observables made when the rF magnetic fields are designed based on the Chebichev polynomials. The representative function of each component is plotted to describe the complete evolution of the NMR transverse magnetization component for medical and biomedical applications. This mathematical technique may allow us to manipulate microscopic blood (cells) at nanoscale. We may be able to theoretically simulate nano-devices that may travel through tiny capillaries and deliver oxygen to anemic tissues, remove obstructions from blood vessels and plaque from brain cells, and even hunt down and destroy viruses, bacteria, and other infectious agents. This paper proposes a solution to Bloch NMR flow equations in biomedical fluid dynamics using a new set of real polynomials. In fact, the authors conjugated their efforts in order to take benefit from similarities between independent Bloch NMR flow equations yielded by a recent study and the newly proposed characteristic differential equation of the m-Boubaker polynomials. The main goal of this study is to establish a methodology of using mathematical techniques so that the accurate measurement of blood flow in human physiological and pathological conditions can be carried out non-invasively and becomes simple to implement in medical clinics. Specifically, the polynomial solutions of the derived Bloch NMR equation are obtained for use in biomedical fluid dynamics. The polynomials represent the T2-weighted NMR transverse magnetization and signals obtained in terms of Boubaker polynomials, which can be an attractive mathematical tool for simple and accurate analysis of hemodynamic functions of blood flow system. The solutions provide an analytic way to interpret observables made when the rF magnetic fields are designed based on the Chebichev polynomials. The representative function of each component is plotted to describe the complete evolution of the NMR transverse magnetization component for medical and biomedical applications. This mathematical technique may allow us to manipulate microscopic blood (cells) at nanoscale. We may be able to theoretically simulate nano-devices that may travel through tiny capillaries and deliver oxygen to anemic tissues, remove obstructions from blood vessels and plaque from brain cells, and even hunt down and destroy viruses, bacteria, and other infectious agents.

Graphemes Segmentation for Arabic Online Handwriting Modeling

Boubaker, Houcine,Tagougui, Najiba,El Abed, Haikal,Kherallah, Monji,Alimi, Adel M. Korea Information Processing Society 2014 Journal of information processing systems Vol.10 No.4

In the cursive handwriting recognition process, script trajectory segmentation and modeling represent an important task for large or open lexicon context that becomes more complicated in multi-writer applications. In this paper, we will present a developed system of Arabic online handwriting modeling based on graphemes segmentation and the extraction of its geometric features. The main contribution consists of adapting the Fourier descriptors to model the open trajectory of the segmented graphemes. To segment the trajectory of the handwriting, the system proceeds by first detecting its baseline by checking combined geometric and logic conditions. Then, the detected baseline is used as a topologic reference for the extraction of particular points that delimit the graphemes' trajectories. Each segmented grapheme is then represented by a set of relevant geometric features that include the vector of the Fourier descriptors for trajectory shape modeling, normalized metric parameters that model the grapheme dimensions, its position in respect to the baseline, and codes for the description of its associated diacritics.

Simulation and Modelling of the Write/Erase Kinetics and the Retention Time of Single Electron Memory at Room Temperature

Boubaker, Aimen,Sghaier, Nabil,Souifi, Abdelkader,Kalboussi, Adel The Institute of Electronics and Information Engin 2010 Journal of semiconductor technology and science Vol.10 No.2

In this work, we propose a single electron memory 'SEM' design which consist of two key blocs: A memory bloc, with a voltage source $V_{Mem}$, a pure capacitor connected to a tunnel junction through a metallic memory node coupled to the second bloc which is a Single Electron Transistor "SET" through a coupling capacitance. The "SET" detects the potential variation of the memory node by the injection of electrons one by one in which the drainsource current is presented during the memory charge and discharge phases. We verify the design of the SET/SEM cell by the SIMON tool. Finally, we have developed a MAPLE code to predict the retention time and nonvolatility of various SEM structures with a wide operating temperature range.

Simulation and Modelling of the Write/Erase Kinetics and the Retention Time of Single Electron Memory at Room Temperature

Aimen Boubaker,Nabil Sghaier,Abdelkader Souifi,Adel Kalboussi 대한전자공학회 2010 Journal of semiconductor technology and science Vol.10 No.2

In this work, we propose a single electron memory 'SEM' design which consist of two key blocs: A memory bloc, with a voltage source VMem, a pure capacitor connected to a tunnel junction through a metallic memory node coupled to the second bloc which is a Single Electron Transistor "SET" through a coupling capacitance. The "SET" detects the potential variation of the memory node by the injection of electrons one by one in which the drainsource current is presented during the memory charge and discharge phases. We verify the design of the SET/SEM cell by the SIMON tool. Finally, we have developed a MAPLE code to predict the retention time and nonvolatility of various SEM structures with a wide operating temperature range.

Graphemes Segmentation for Arabic Online Handwriting Modeling

( Houcine Boubaker ),( Najiba Tagougui ),( Haikal El Abed ),( Monji Kherallah ),( Adel M. Alimi ) 한국정보처리학회 2014 Journal of information processing systems Vol.10 No.4

In the cursive handwriting recognition process, script trajectory segmentation and modeling represent an important task for large or open lexicon context that becomes more complicated in multi-writer applications. In this paper, we will present a developed system of Arabic online handwriting modeling based on graphemes segmentation and the extraction of its geometric features. The main contribution consists of adapting the Fourier descriptors to model the open trajectory of the segmented graphemes. To segment the trajectory of the handwriting, the system proceeds by first detecting its baseline by checking combined geometric and logic conditions. Then, the detected baseline is used as a topologic reference for the extraction of particular points that delimit the graphemes’ trajectories. Each segmented grapheme is then represented by a set of relevant geometric features that include the vector of the Fourier descriptors for trajectory shape modeling, normalized metric parameters that model the grapheme dimensions, its position in respect to the baseline, and codes for the description of its associated diacritics.

A Prediction Model for studying the Impact of Separated Families on Students using Decision Tree

Ourida Ben boubaker,Ines Hosni,Hala Elhadidy International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.4

Social studies show that the number of separated families have lately increased due to different reasons. Despite the causes for family rift, many problems are resulted which affected the children physically and psychologically. This effect may cause them fail in their life especially at school. This paper focuses on the negative reaction of the parents' separation with other factors from the computer science prospective. Since the artificial intelligent field is the most common widespread in computer science, a predictive model is built to predict if a specific child whose parents separated, may complete the school successfully or fail to continue his education. This will be done using Decision Tree that have proved their effectiveness on the predication applications. As an experiment, a sample of individuals is randomly chosen and applied on our prediction model. As a result, this model shows that the separation may cause the child success at school if other factors are satisfied; the intelligent of the guardian, the relation between the parents after the separation, his age at the separation time, etc.

Heat transfer spray model: An improved theoretical thermal time-response to uniform layers deposit using Bessel and Boubaker polynomials

M. Dada,O.B. Awojoyogbe,K. Boubaker 한국물리학회 2009 Current Applied Physics Vol.9 No.3

This study presents temperature profiling theoretical investigations in a pyrolysis spray model. Calculations are based on heat transfer equation resolution in cylindrical coordinates. Boundary conditions are taken into account in the resolution algorithm at different stages. This study presents temperature profiling theoretical investigations in a pyrolysis spray model. Calculations are based on heat transfer equation resolution in cylindrical coordinates. Boundary conditions are taken into account in the resolution algorithm at different stages.

Mathematical model of the Bloch NMR flow equations for the analysis of fluid flow in restricted geometries using the Boubaker polynomials expansion scheme

O.B. Awojoyogbe,O.P. Faromika,Folorunsho O. Moses,M. Dada,K. Boubaker,I.A. Fuwape 한국물리학회 2010 Current Applied Physics Vol.10 No.1

In this study, the Bloch NMR flow equations are modelled into diffusion equation with constant transport coefficient in terms of the NMR transverse magnetization. Mathematical conditions are established for the diffusion coefficients to be constant or spatially varied with direction. When these conditions are met, the diffusion coefficients can then be easily evaluated in terms of Boubaker polynomials for the study of flow in restricted geometries.

A C5 Parallel Robot Identification and Control

Brahim Achili,Boubaker Daachi,Arab Ali-cherif,Yacine Amirat 제어·로봇·시스템학회 2010 International Journal of Control, Automation, and Vol.8 No.2

The paper proposes a controller scheme based on a priori identification for a C5 parallel robot. First we realize the identification of dynamic parameters of the robot using the Least Squares technique. Different data are used for this step of identification. The cross validation permitted to select and confirm the identified parameters. After, a control scheme (computed torque) is applied to control the C5 parallel robot. The functions of this control scheme are based on precedent identified parameters. In order to reduce the effect of the identification error, we have added a robustness term based on sliding mode technique. The stability of the system in closed loop is presented using the Lyapunov principle. Experimental results of identification and control are presented and show the effectiveness of our methodology.