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Study on the Mercury （11） Complex of 4,5-benzol,2-dithiole-3-thione by IR, Theoricaly and X-Ray

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Journal of Chemistry and Chemical Engineering 2010年第4期4卷 41-48页

作者： EL-Adoui Laifa Khaled Boukebbous Abdelkarim Houam Khelifi Touhami Fatima adnan mohamed hassan kermandji Department of Chemistry Faculty of Sciences University Mentouri Constantine 25000 Algeria Department of Biology and Ecology Faculty Nature and Life University Mentouri Constantine 25000 Algeria

A mercury （II） complex with 4.5-benzo-1.2-dithiol-3-thione （C7H4S3）（1）, [Hg2I4（C7H4S3）2] （2） was synthesized. The structure of the obtained complex （2） was characterized by crystallography, Infrared Spectroscopy （IR） analysis and theoretical study. The complex （2） has a dimeric structure, where each mercury atom takes a tetrahedral geometry and is coordinated by two bridging chloride, one terminal chloride and one thiocarbonyl sulfur atom （C=S） of the ligand.

关键词： Mercury (II) complex dithiole-3- thione crystal structure theoretical study.

Improving data hiding within colour images using hue component of HSV colour space

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CAAI Transactions on Intelligence Technology 2022年第1期7卷 56-68页

作者： Fatuma Saeid hassan adnan Gutub Computer Engineering Department Umm Al-Qura UniversityMakkahSaudi Arabia

Data hiding technologies aim to hide the existence of secret information within digital covers such as images by causing unnoticeable degradation to their *** the image distortion and increasing the embedding capacity are the main points that the data hiding techniques revolved *** article proposes two high payload embedding methods with high stego image quality using the Hue-Saturation-Value(HSV)colour *** first method is hue-based embedding(HBE)that employs the H plane for hiding one or two bits in non-grey *** second method uses the three HSV components,so it is called three-planes embedding(TPE).In TPE,one bit is hidden in the least significant bit(LSB)of V of the grey pixels,one or two bits in H of the pixels having low saturation or low brightness and one bit in the LSB of S *** experiments were conducted on 25 images and the results show that HBE hides more data on average than TPE with its quality reaching 60 *** achieves quality up to 61 dB and capacity reaches 364 *** scores the highest capacity among six state-of-the-art techniques in Red-Green-Blue,HSV,Hue-Saturation-Intensity and YCbCr spaces with the highest average peak signal to noise ratio midst five of *** embedding 60,90,and 120 Kb,this TPE attains the best average quality amid all the methods.

关键词： otherwise colour payload

A novel fractional case study of nonlinear dynamics via analytical approach

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Applied Mathematics(A Journal of Chinese Universities) 2024年第2期39卷 276-290页

作者： hassan Khan adnan Khan Rasool Shah Dumitru Baleanu Department of Mathematics Abdul Wali khan UniversityMardan 23200Pakistan Department of Mathematics Faculty of Arts and SciencesCankaya UniversityAnkara 06530Turkey Institute of Space Sciences Magurele-BucharestRomania

The present work describes the fractional view analysis of Newell-Whitehead-Segal equations,using an innovative *** work is carried with the help of the Caputo operator of fractional *** analytical solutions of some numerical examples are presented to confirm the reliability of the proposed *** derived results are very consistent with the actual solutions to the problems.A graphical representation has been done for the solution of the problems at various fractional-order ***,the solution in series form has the desired rate of convergence and provides the closed-form *** is noted that the procedure can be modified in other directions for fractional order problems.

关键词： Homotopy Perturbation method Shehu transform Newell-Whitehead-Segel Equation Caputo operator

Gut microbiome in non-alcoholic fatty liver disease associated hepatocellular carcinoma:Current knowledge and potential for therapeutics

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World Journal of Gastrointestinal Oncology 2022年第5期14卷 947-958页

作者： Imaad Said hassan Ahad adnan Said Brown University ProvidenceRI 02912United States Kansas University LawrenceKS 66045United States Division of Gastroenterology and Hepatology Department of MedicineWilliam S.Middleton VAMCUniversity of Wisconsin School of Medicine and Public HealthMadisonWI 53705United States

Metabolic diseases such as nonalcoholic fatty liver disease(NAFLD)are rising in incidence and are an increasingly common cause of cirrhosis and hepatocellular carcinoma(HCC).The gut microbiome is closely connected to the liver via the portal vein,and has recently been identified as a predictor of liver disease *** in NAFLD,cirrhosis and HCC have identified certain microbial signatures associated with these diseases,with the disease-associated microbiome changes collectively referred to as *** pathophysiologic underpinnings of these observations are an area of ongoing investigation,with current evidence demonstrating that the gut microbiome can influence liver disease and carcinogenesis via effects on intestinal permeability(leaky gut)and activation of the innate immune *** the innate immune system,pathogen recognition receptors(Toll like receptors)on resident liver cells and macrophages cause liver inflammation,fibrosis,hepatocyte proliferation and reduced antitumor immunity,leading to chronic liver disease and ***-associated changes include increase in secondary bile acids and reduced expression of FXR(nuclear receptor),which have also been associated with deleterious effects on lipid and carbohydrate metabolism associated with progressive liver *** experimental and clinical studies are needed in different populations to examine these questions *** role of therapeutics that modulate the microbiome is an emerging field with experimental studies showing the potential of diet,probiotics,fecal microbiota transplantation and prebiotics in improving liver disease in experimental *** studies are ongoing with preliminary evidence showing improvement in liver enzymes and *** microbial profile is different in responders to cancer immunotherapy including liver cancer,but whether or not manipulation of the microbiome can be utilized to affect response is being investigated.

关键词： Microbiome Gut microbiome Hepatocellular carcinoma Nonalcoholic fatty liver disease Pathophysiology Treatment

Estimating the basic reproduction number for single-strain dengue fever epidemics

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Infectious Diseases of Poverty 2014年第1期3卷 100-116页

作者： adnan Khan Muhammad hassan Mudassar Imran Department of Mathematics Lahore University of Management SciencesDHALahorePakistan Department of Mathematics Swiss Federal Institute of Technology(ETH)ZurichRämistrasse 1018092 ZurichSwitzerland

Background:Dengue,an infectious tropical disease,has recently emerged as one of the most important mosquito-borne viral diseases in the *** perform a retrospective analysis of the 2011 dengue fever epidemic in Pakistan in order to assess the transmissibility of the *** obtain estimates of the basic reproduction number R0 from epidemic data using different methodologies applied to different epidemic models in order to evaluate the robustness of our ***:We first estimate model parameters by fitting a deterministic ODE vector-host model for the transmission dynamics of single-strain dengue to the epidemic data,using both a basic ordinary least squares(OLS)as well as a generalized least squares(GLS)***,we perform the same analysis for a direct-transmission ODE model,thereby allowing us to compare our results across different *** addition,we formulate a direct-transmission stochastic model for the transmission dynamics of dengue and obtain parameter estimates for the stochastic model using Markov chain Monte Carlo(MCMC)*** each of the cases we have considered,the estimate for the basic reproduction number R0 is initially greater than unity leading to an epidemic ***,control measures implemented several weeks after the initial outbreak successfully reduce R0 to less than unity,thus resulting in disease ***,it is observed that there is strong agreement in our estimates for the pre-control value of R0,both across different methodologies as well across different ***,there are also significant differences between our estimates for the post-control value of the basic reproduction number across the two different ***:In conclusion,we have obtained robust estimates for the value of the basic reproduction number R0 associated with the 2011 dengue fever epidemic before the implementation of public health control ***,we have shown that there is close agreement

关键词： Epidemiology Dengue fever Statistical inference Stochastic model Markov chain Monte Carlo

Observer-based Adaptive Fuzzy Control for a Class of Nonlinear Time-delay Systems

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International Journal of Automation and computing 2013年第4期10卷 275-280页

作者： hassan A. Yousef mohamed Hamdy Department of Electrical and Computer Engineering College of Engineering Sultan Qaboos University Department of Industrial Electronics and Control Engineering Faculty of Electronic Engineering Menofia University

An observer-based adaptive fuzzy control is presented for a class of nonlinear systems with unknown time delays. The state observer is first designed, and then the controller is designed via the adaptive fuzzy control method based on the observed states. Both the designed observer and controller are independent of time delays. Using an appropriate Lyapunov-Krasovskii functional, the uncertainty of the unknown time delay is compensated, and then the fuzzy logic system in Mamdani type is utilized to approximate the unknown nonlinear functions. Based on the Lyapunov stability theory, the constructed observer-based controller and the closed-loop system are proved to be asymptotically stable. The designed control law is independent of the time delays and has a simple form with only one adaptive parameter vector, which is to be updated on-line. Simulation results are presented to demonstrate the effectiveness of the proposed approach.

关键词： Observer adaptive fuzzy control nonlinear systems time delay stability.

Fe_(3)O_(4)-carbon spheres core–shell supported palladium nanoparticles:A robust and recyclable catalyst for suzuki coupling reaction

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Chinese Journal of Chemical Engineering 2022年第11期51卷 75-85页

作者： mohamed A.Almaradhi hassan M.A.hassan Mosaed S.Alhumaimess Department of Chemistry College of ScienceJouf UniversityPO Box 2014SakakaSaudi Arabia

Suzuki-Miyaura(S-M)is regarded the most powerful way for synthesis biaryls,triaryls,or incorporating of substituted aryl moieties in organic preparation by the cross-coupling of aryl boronic acid with aryl halides using the Pd *** work reports the combining of the hydrothermal and microwaveassisted protocol to convert the glucose to magnetic carbon spheres(Fe_(3)O_(4)-CSPs)decorated with Pd nanoparticles(NPs)as the catalyst for Suzuki-Miyaura cross-coupling *** physicochemical properties in the produced composite were examined using FESEM,HRTEM,nitrogen isotherms,Raman spectroscopy,FTIR,XPS,and *** as-fabricated composite Pd/Fe_(3)O_(4)-CSPs is mostly spherical with a core–shell structure and possesses a great surface area of 253.2 m^(2).g^(-1).Its catalytic performance demonstrates that the composite has excellent stability and high tolerance Suzuki-Miyaura crosscoupling reactions in 30 min at 80℃.Both activated and deactivated aryl halides provided excellent *** as-fabricated catalyst was recycled for up to four catalytic cycles without a substantial decline in ***,this research offers a facile roadmap for synthesizing Pd/Fe_(3)O_(4)-CSPs composites and promoting the practical implementation of Pd/Fe_(3)O_(4)-CSPs catalysts for organic transformation processes.

关键词： Heterogeneous catalysis Aryl halide Suzuki coupling Palladium nanoparticles Carbon spheres

Review of analytical methods for stress and deformation analysis of buried water pipes considering pipe-soil interaction

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Underground Space 2023年第6期13卷 205-227页

作者： Yingxu Huo Sherif Mohsen mohamed hassan Gomaa Tarek Zayed mohamed Meguid Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomHong Kong 999077China Department of Building and Real Estate The Hong Kong Polytechnic UniversityHung HomHong Kong 999077China Structural Engineering Department Faculty of EngineeringMansoura UniversityMansoura 35516Egypt Department of Civil Engineering McGill UniversityMontrealQuebec H3A 0G4Canada

Buried water pipelines are vulnerable to fail or break due to excessive loading or ground *** evaluation of pipe performance and serviceability relies on the proper understanding of pipe-soil interactions(PSI).Analytical methods are important approaches to studying ***,a systematic and thorough literature review to analyze the existing research trends,technological achievements and future research opportunities is not *** work investigates analytical methods that analyze the stress and deformation of pipes in terms of cross-sectional,transverse and longitudinal PSI ***,scientometric analysis is performed to acquire relevant research works from online databases and analyze the existing data of influential authors,productive research sources and frequent key word occurrence in the fields of ***,a qualitative discussion is performed in the three categories of PSI:(1)cross-sectional,including ovalization and circumferential behaviours;(2)transverse,including seismic fault crossing,weak soil zones,ground settlement and pipe uplift;and(3)***,six research opportunities are discussed,including the role of friction in cross-sectional deformation,combined effects of bending and compression,choice of soil reaction models and calibration of key parameters,effect of pipe flaws,soil spatial variability and behaviours of curved *** study helps beginners familiarize themselves with PSI analytical methods and provides experienced researchers with ideas for future research directions.

关键词： Pipeline Analytical methods Pipe-soil interactions Seismic fault Settlement Uplift Buckling Tunnelling

Recursive harmonic analysis for computing Hansen coefficients

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Research in Astronomy and Astrophysics 2010年第12期10卷 1298-1306页

作者： mohamed Adel Sharaf Hadia hassan Selim Astronomy Department Faculty of Science King Abdul Aziz University Astronomy Department National Research Institute of Astronomy and Geophysics

We report on a simple pure numerical method developed for computing Hansen coefficients by using a recursive harmonic analysis technique. The precision criteria of the computations are very satisfactory and provide materials for computing Hansen＇s and Hansen＇s like expansions, and also to check the accuracy of some existing algorithms.

关键词： celestial mechanics -- methods: numerical