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A User-friendly Model for Ransomware Analysis Using Sandboxing

Computers, Materials & Continua 2021年第6期67卷 3833-3846页

作者： Akhtar Kamal Morched Derbali Sadeeq Jan Javed Iqbal Bangash Fazal Qudus Khan Houssem Jerbi rabeh abbassi Gulzar Ahmad Department of Computer Science&Information Technology National Center for Cyber SecurityUniversity of Engineering&TechnologyPeshawar25120Pakistan Department of Information Technology Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia Institute of Computer Sciences and Information Technology(ICS/IT) University of AgriculturePeshawar25130Pakistan Department of Industrial/Electrical Engineering College of EngineeringUniversity of Ha’ilHail1234Saudi Arabia Department of Electrical Engineering University of Engineering&TechnologyPeshawar25120Pakistan

Ransomware is a type of malicious software that blocks access to a computer by encrypting user’s files until a ransom is paid to the *** have been several reported high-profile ransomware attacks including WannaCry,Petya,and Bad Rabbit resulting in losses of over a billion dollars to various individuals and businesses in the *** analysis of ransomware is often carried out via sandbox environments;however,the initial setup and configuration of such environments is a challenging ***,it is difficult for an ordinary computer user to correctly interpret the complex results presented in the reports generated by such environments and analysis *** this research work,we aim to develop a user-friendly model to understand the taxonomy and analysis of ransomware ***,we aim to present the results of analysis in the form of summarized reports that can easily be understood by an ordinary computer *** model is built on top of the well-known Cuckoo sandbox environment for identification of the ransomware as well as generation of the summarized *** addition,for evaluating the usability and accessibility of our proposed model,we conduct a comprehensive user survey consisting of participants from various fields,e.g.,professional developers from software houses,people from academia(professors,students).Our evaluation results demonstrate a positive feedback of approximately 92%on the usability of our proposed model.

关键词： Ransomware sandbox user-friendly model survey

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Governance Quality,Public Expenditure Efficiency,and Economic Growth

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Journal of Modern Accounting and Auditing 2022年第5期18卷 193-211页

作者： Sonia Sayari abbassi rabeh Saudi Electronic University JeddahSaudi Arabia University Tunis El Manar El Manar University CampusTunisTunisia

In this paper,we first examine the impact of governance quality on public expenditure ***,we try to determine the effect of these expenditures on economic *** starting point is the idea that public expenditure efficiency of a government program is significantly affected by the country’s governance *** other words,changes in government expenditure and the returns they generate on a government program depend on governance *** sample consists of 36 countries observed over the 1996 to 2020 *** period is known by a significant transition of political *** research model links government expenditure with the returns generated in a country in a given *** this model,we introduce the governance variable to examine the impact of government expenditure on returns on a government program in terms of schooling rates and life *** results indicate that governance quality affects expenditure structure and that efficiency of this expenditure positively correlates with a better governance quality as measured by corruption control and government *** also found that efficient expenditure has a positive impact on economic growth.

关键词： governance quality public expenditure returns efficiency economic growth dynamic GMM DEA

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Using 3-D magnetic modeling to evaluate subsurface structures of the Siwa Oasis,Western Desert,Egypt

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Science China Earth Sciences 2012年第2期55卷 279-289页

作者： Taha rabeh National Research Institute of Astronomy and Geophysics CairoEgypt IDL Faculty of ScienceLisbon UniversityPortugal

This work was designed to study the subsurface structures in the Siwa Oasis area of the Western Desert in Egypt and to determine their effects on surface geologic structures. A detailed land magnetic survey was performed in traverses covering about 400 km2 of the study area. The measured total magnetic field was corrected and reduced to the north magnetic pole. The reduction-to-pole aeromagnetic and Bouguer anomaly maps were used to obtain regional extensions of these subsurface structures, study the continuation of these structures in sedimentary rocks, and delineate the depths to the basement rocks. Data analysis was performed using trend analysis, Euler deconvolution, Werner deconvolution, the Hilbert transform of the analytical signal, and 3-dimensional magnetic modeling methods. The results indicate that the area is affected by tectonic forces in the E-W, N45°-65°E, and N35°-45°W trends, which are correlated with the directions of surface geologic lineaments. The depth to the basement rocks increases from 3.2 km in the southern part to about 3.6 km in the northern part of the area. The results are in good agreement with depths obtained from drill hole data in the area.

关键词： land magnetic survey aeromagnetic data gravity data fault and dyke parameters

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Substrate Temperature-Dependent Physical Properties of Thermally Evaporated Sn4Sb6S13 Thin Films

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Acta Metallurgica Sinica(English Letters) 2016年第1期29卷 79-88页

作者： A. Harizi M. Ben rabeh M. Kanzari Laboratoire de Photovoltaique et Materiaux Semiconducteurs departement genie industriel ENIT-Universite Tunis E1 Manar BP 37 Le belvedere 1002 Tunis Tunisie Institut Preparatoire aux Etudes d'Ingenieurs de Tunis Universite de Tunisie Montfleury Tunisia

In this work, the homogenous thin films of sulfosalt Sn4Sb6S13 were successfully synthesized by the thermal evaporation technique onto coming 7059 glass substrates heated at various temperatures in the range of 30--200 ℃. The surface morphology and structural characteristics of Sn4Sb6S13 films were analyzed by atomic force microscopy, X-ray diffraction, and energy-dispersive X-ray, respectively. The X-ray diffraction analysis revealed that Sn4Sb6S13 thin films crystallized in monoclinic structure according to a preferential direction （6 11）. An improvement in the structural properties by increasing the substrate temperature was observed. The values of some important parameters such as absorption coefficient （x）, band gap （Eg）, refractive index （n）, extinction coefficient （k）, and dielectric constant （Eg） of thin film were determined. The absorption coefficient was larger than 105 cm-l in the visible range. The electron transition of Sn4Sb6S13 films was direct allowed with the values that decreased （2-1.69 eV） by increasing substrate temperature from 30 to 200 ℃,The dispersion data obeyed the single oscillator relation of the Wemple-DiDomenico model and Cauchy model. The electrical free carrier susceptibility and the carrier concentration of the effective mass ratio were estimated according to the model of Spitzer and Fan.

关键词： Thin film Thermal evaporation technique X-ray diffraction Optical parameters

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Structural Morphological and Optical Properties of SnSb_2S_4 Thin Films Grown by Vacuum Evaporation Method

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Journal of Materials Science & Technology 2014年第10期30卷 1006-1011页

作者： N.Khedmi M.Ben rabeh M.Kanzari Laboratoire de Photovoltaques et Matriaux de Semi-conducteurs-ENIT-Universit de Tunis el Manar BP 37le belvedere1002 TunisTunisie Laboratoire de Photovoltaques et Matriaux de Semi-conducteurs-ENIT-IPEITunis Montfleury-Universit de Tunis Tunisie

SnSb2S4 thin films were prepared from powder by thermal evaporation under vacuum of 1.33 × 10^-4 Pa （ 10^-6 Torr） on unheated glass substrates. The effect of thickness on the structural, morphological and optical properties of SnSb2S4 thin films was investigated. Films thickness measured by interference fringes method varied from 50 to 700 nm. X-ray diffraction analysis revealed that all the SnSb2S4 films were polycrystalline in spite without heating the substrates and the crystallinity was improved with increasing film thickness. The microstructure parameters： crystallite size, strain and dislocation density were calculated. It was observed that the crystallite size increased and the crystal defects decreased with increasing film thickness. In addition, by increasing the film thickness, an enhancement in the surface roughness root-mean-square （RMS） increased from 2.0 to 6.6 nm. The fundamental optical parameters like band gap, absorption and extinction coefficient were calculated in the strong absorption region of transmittance and reflectance spectrum. The optical absorption measurements indicated that the band （Eg） gap of the thin films decreased from 2.10 to 1.65 eV with increasing film thickness. The refractive indexes were evaluated in transparent region in terms of envelope method, which was suggested by Swanepoul. It was observed that the refractive index increased with increasing film thickness.

关键词： Ternary system Thermal evaporation technique Thin films Thickness Atomic force microscopy (AFM)

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Performance Enhancement of Adaptive Neural Networks Based on Learning Rate

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Computers, Materials & Continua 2023年第1期74卷 2005-2019页

作者： Swaleha Zubair Anjani Kumar Singha Nitish Pathak Neelam Sharma Shabana Urooj Samia rabeh Larguech Department of Computer Science Aligarh Muslim UniversityAligarh202002Uttar PradeshIndia Department of Information Technology Bhagwan Parshuram Institute of Technology(BPIT)GGSIPUNew Delhi110089India Department of Computer Science and Engineering Maharaja Agrasen Institute of Technology(MAIT)GGSIPUNew DelhiIndia Department of Electrical Engineering College of EngineeringPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia

Deep learning is the process of determining parameters that reduce the cost function derived from the *** optimization in neural networks at the time is known as the optimal *** solve optimization,it initialize the parameters during the optimization *** should be no variation in the cost function parameters at the global *** momentum technique is a parameters optimization approach;however,it has difficulties stopping the parameter when the cost function value fulfills the global minimum(non-stop problem).Moreover,existing approaches use techniques;the learning rate is reduced during the iteration *** techniques are monotonically reducing at a steady rate over time;our goal is to make the learning rate *** present a method for determining the best parameters that adjust the learning rate in response to the cost function *** a result,after the cost function has been optimized,the process of the rate Schedule is *** approach is shown to ensure convergence to the optimal *** indicates that our strategy minimizes the cost function(or effective learning).The momentum approach is used in the proposed *** solve the Momentum approach non-stop problem,we use the cost function of the parameter in our proposed *** a result,this learning technique reduces the quantity of the parameter due to the impact of the cost function *** verify that the learning works to test the strategy,we employed proof of convergence and empirical tests using current methods and the results are obtained using Python.

关键词： Deep learning optimization convergence stochastic gradient methods

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Blowing Up of Sign-Changing Solutions to an Elliptic Subcritical Equation

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Journal of Partial Differential Equations 2012年第4期25卷 366-386页

作者： GHOUDI rabeh Departement de Mathematiques Faculte des Sciences de Gabes Cite El Riadh Tunisia.

This paper is concerned with the following non linear elliptic problem in- volving nearly critical exponent （Pεk）：（-△）ku = K（x）｜u｜（4k/（n-2k））-εu in Ω, △k-lu =… △u = u = 0 on δΩ, where Ω is a bounded smooth domain in Rn, n≥ 2k＋2, k≥ 1, ε is a small positive parameter and K is a smooth positive function in Ω. We construct sign- changing solutions of （pεk） having two bubbles and blowing up either at two different critical points of K with the same speed or at the same critical point.

关键词： Blow-up analysis sign-changing solutions critical exponent.

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New Results for the tectonics of Sinai Peninsula, Egypt

New Results for the tectonics of Sinai Peninsula, Egypt

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2018年中国地球科学联合学术年会

作者： Taha rabeh National Research Institute of Astronomy and Geophysics (NRIAG) Cairo

*** The geology of the Sinai Peninsula ranges from Precambrian basement rocks to Quaternary *** to the surface geologic map after Khalil,1998;McClay et al.,1998,Egyptian Geological Survey(1993),the Quaternary deposits cover the northern part and along the Gulf of Sinai and the Mediterranean Sea *** Mesozoic limestone

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Phytochemical screening and free radical scavenging activity of Citrullus colocynthis seeds extracts

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Asian Pacific Journal of Tropical Biomedicine 2013年第1期3卷 35-40页

作者： Nabila Benariba rabeh Djaziri Wafaa Bellakhdar Nacera Belkacem Marcel Kadiata Willy J.Malaisse Abdullah Sener Laboratory of Antibiotic and Antifungal Physico-Chemistry Synthesis and Biological ActivityFaculte des SciencesUniversity Abou Bekr Belkaid Laboratory of Experimental Hormonology Universite Libre de Bruxelles

Objective:To study the phytochemical screening of different extracts from Citrullus colocynthis(***)seeds extracts and to assess their antioxidant activity on the DPPH free radical ***:Phytochemical screening,total content of polyphenols and flavonoids of *** seeds extracts,including a crude aqueous extract(E1),a defatted aqueous extract(E2),a hydromethanolic extract(HM),an ethyl acetate extract(EA)and a n-butanol extract(n-B)was carried out according to the standard methods and to assess their corresponding effect on the antioxidant activity of this ***:None of these extracts contained detectable amount of alkaloid,quinone,antraquinone,or reducing *** tannins and flavonoids were abundant in E1,MM and EA,whilst terpenoids were abundantly present in E1 and n-B but only weekly in *** were found in E2,EA and ***,expressed as gallic acid equivalent,amounted,per 100 g plant matter,to 329,1002 and 150 mg in EA,HM an E1 ***,expressed as catechin equivalent,*** 100 g plant matter to 620,241 and 94 mg in EA,HM and E1 *** values were found in n-B and E1,with lower values in ***,myricetin and gallic acid were found in the EA and HM extracts by thin layer chromatography,The antioxidative effect of these extracts yielded,when tested at a concentration of 2000μg/mL in a 1,1-diphenyl-2-picrylhydrazyl assay,a reducing percentage of 88.8%with EA,74.5%with HM and 66.2%with E1,and corresponding IC_(50)of 350,580and 500μg/mL as compared to 1.1μg/mL for ascorbic ***:These qualitative and quantitative analytical data document the presence in *** extracts of such chemical compounds as flavonoids responsible for the antioxidant activity,as well as other biological activities of this plant.

关键词： Citrullus colocynthis Polyphenols Flavonoids Free radical scavenging

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The Effect of Starvation on the Biochemical Composition of the Digestive Gland, the Gonads and the Adductor Muscle of the Scallop <i>Flexopecten</i><i>glaber</i>

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Food and Nutrition Sciences 2013年第4期4卷 405-413页

作者： Khaoula Telahigue Tarek Hajji Imen rabeh M’hamed El Cafsi Research Unit of Physiology and Aquatic Environment Faculty of Sciences of Tunis University of Tunis El Manar Tunis Tunisia

The effects of the starvation trial on the biochemical composition and the fatty acid dynamics in the triacylglycerol fraction of the digestive gland, gonads and adductor muscle of the scallop Flexopecten glaber were assessed. Results show that three weeks of food deprivation induce depletion of carbohydrates and a significant decrease in proteins and lipids. The noteworthy patterns recorded for the various classes of lipids were the increase of the amount of phosphatidylethanolamine against a strong decline of mono-diacylglycerols, triacylglycerol and phosphatidylserine classes in gonads. These results reflect the ability of Flexopecten glaber to remodel endogenous lipid classes in order to avoid the gonads deterioration. In the starved specimens, severe declines of the n-3 polyunsaturated fatty acid group were recorded in the triacylglycerol fraction of digestive gland and adductor muscle against the increase of this group in gonads. These results confirm the role of triacylglycerol as a polyunsaturated fatty acids reservoir and pointed out to their mobilization from storage organs to the developing gonads during the food shortage trial. Examination of fatty acid data revealed that food deprivation lead Flexopecten glaber to invest in saving and accumulation of highly unsaturated fatty acids in gonads. This applies mainly to the arachidonic acid (20:4n-6) and the docosahexaenoic acid (22:6n-3).

关键词： Starvation Scallop Chemical Composition Organs Fatty Acid

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