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STABILITY OF THE S-LEFT AND S-RIGHT ESSENTIAL SPECTRA OF A LINEAR OPERATOR

Acta Mathematica Scientia 2014年第6期34卷 1922-1934页

作者： Aymen AMMAR Bilel BOUKETTAYA aref jeribi Département de Mathématiques Faculté des Sciences de SfaxUniversité de SfaxRoute de Soukra Km 3.5B.P.11713000SfaxTunisie

In the present paper, we define the S-left and the S-right essential spectra of a linear operator and we study the stability of the S-essential spectra on a Banach space.

关键词： S-left essential spectra S-right essential spectra Fredholm perturbation Riesz operator

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ON GRAPH MEASURES IN BANACH SPACES AND DESCRIPTION OF ESSENTIAL SPECTRA OF MULTIDIMENSIONAL TRANSPORT EQUATION

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Acta Mathematica Scientia 2012年第5期32卷 2050-2064页

作者： Boulbeba Abdelmoumen aref jeribi Maher Mnif Dpartement de Mathmatiques Universit de SfaxFacult des Sciences de SfaxRoute de SoukraKm 3.5B.P.11713000SfaxTunisie

In this paper,we define new measures called respectively graph measure of noncompactness and graph measure of weak ***,we apply the obtained results to discuss the incidence of some perturbation results realized in [2] on the behavior of essential spectra of such closed densely defined linear operators on Banach *** results are exploited to investigate the essential spectra of a multidimensional neutron transport operator on L1 spaces.

关键词： measures of noncompactness and weak noncompactness in Banach spaces Fredholm operators essential spectra

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Fixed Point Theorems for(p, q)-Quasi-Contraction Mappings in Cone Metric Spaces

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Chinese Annals of Mathematics,Series B 2016年第2期37卷 211-220页

作者： Wajdi CHAKER Abdelaziz GHRIBI aref jeribi Bilel KRICHEN Higher Institute of Applied Biology Medenine El Jorf Road Km 22MedenineTunisia Higher Institute of Business Administration of Sfax Airport Road Km 4 B.P.N1013 3018 B.P.1013SfaxTunisia Department of Mathematics Faculty of Science of SfaxSoukra Road Km 3.5B.P.11713000SfaxTunisia Department of Mathematics Preparatory Engineering InstituteMenzel Chaker Road Km 0.5B.P.1172-3018SfaxTunisia

In this work, the authors introduce the concept of(p, q)-quasi-contraction mapping in a cone metric space. We prove the existence and uniqueness of a fixed point for a(p, q)-quasi-contraction mapping in a complete cone metric space. The results of this paper generalize and unify further fixed point theorems for quasi-contraction, convex contraction mappings and two-sided convex contraction of order 2.

关键词： Fixed points (p q)-Quasi-contractions Cone metric space

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Edge-Computing with Graph Computation:A Novel Mechanism to Handle Network Intrusion and Address Spoofing in SDN

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Computers, Materials & Continua 2020年第12期65卷 1869-1890页

作者： Rashid Amin Mudassar Hussain Mohammed Alhameed Syed Mohsan Raza Fathe jeribi Ali Tahir University of Engineering and Technology TaxilaPakistan University of Wah Wah CanttPakistan Jazan University JazanSaudi Arabia Abasyn University Islamabad IslamabadPakistan

Software Defined Networking(SDN)being an emerging network control model is widely recognized as a control and management *** model provides efficient techniques to control and manage the enterprise *** emerging paradigm is edge computing in which data processing is performed at the edges of the network instead of a central *** data processing at the edge nodes reduces the latency and bandwidth *** SDN,the controller is a single point of *** security issues related to the traditional network can be solved by using SDN central management and *** Spoofing and Network Intrusion are the most common *** attacks severely degrade performance and *** propose an edge computing-based mechanism that automatically detects and mitigates those *** this mechanism,an edge system gets the network topology from the controller and the Address Resolution Protocol(ARP)traffic is directed to it for further *** such,the controller is saved from unnecessary processing related to addressing *** propose a graph computation based method to identify the location of an attacker or intruder by implementing a graph difference *** using the correct location information,the exact attacker or intruder is blocked,while the legitimate users get access to the network *** proposed mechanism is evaluated in a Mininet simulator and a POX *** results show that it improves system performance in terms of attack mitigation time,attack detection time,and bandwidth requirements.

关键词： Software Defined Networking(SDN) edge computing Address Resolution Protocol(ARP) ARP inspection security graph difference

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Two-Mode Biomedical Sensor Build-up:Characterization of Optical Amplifier

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Computers, Materials & Continua 2022年第3期70卷 5487-5501页

作者： Usman Masud Fathe jeribi Mohammed Alhameed Faraz Akram Ali Tahir Mohammad Yousaf Naudhani Faculty of Electrical and Electronics Engineering University of Engineering and TechnologyTaxila47050Pakistan Department of Electrical Communication Engineering University of KasselKassel34127Germany College of Computer Science&Information Technology Jazan UniversityJazan45142Saudi Arabia Faculty of Engineering and Applied Sciences Riphah International UniversityIslamabad44000Pakistan Faculty of Information&Communication Technology Balochistan University of Information TechnologyEngineering and Management SciencesQuetta

Intracavity absorption spectroscopy is a strikingly sensitive technique that has been integrated with a two-wavelength setup to develop a sensor for human *** factors are considered in such a scenario,out of which Relative Intensity Noise(RIN)has been exploited as an important parameter to characterize and calibrate the said *** the performance of an electrical based assessment arrangement which has been developed in the laboratory as an alternative to the expensive Agilent setup,the optical amplifier plays a pivotal role in its development and operation,along with other components and their ***,the investigation and technical analysis of the amplifier in the system has been explored in *** algorithm developed for the automatic measurements of the system has been effectively deployed in terms of the laser’s *** this in perspective,a frequency dependent calibration has been pursued in depth with this scheme which enhances the sensor’s efficiency in terms of its *** this way,our investigation helps us in a better understanding and implementation perspective of the proposed system,as the outcomes of our analysis adds to the precision and accuracy of the entire system.

关键词： Biomedical sensor cavity optomechanics spectroscopy relative intensity noise semiconductor laser diode

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