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The Lanthanide Tetrad Effect in Argillic Alteration: An Example from the Jizvan District, Northern Iran

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Acta Geologica Sinica(English Edition) 2018年第4期92卷 1468-1485页

作者： Ali ABEDINI mansour REZAEI AZIZI Ali Asghar CALAGARI Department of Geology Faculty of Sciences Urmia University Department of Earth Sciences Faculty of Natural Sciences University of Tabriz

Intrusion of quartz-monzodioritic igneous bodies of Oligocene age into Eocene lithic crystal tufts and trachy-basalts resulted in the occurrence of a widespread argillic alteration zone in the Jizvan district （northern Iran）. Mineralogically, the argillie alteration zone includes minerals such as kaolinite, quartz, smectite, pyrophyllite, muscovite-illite, alunite, rutile, calcite, feldspar, chlorite, hematite and goethite. Therefore, the non-CHARAC behaviour for trace elements in the argillic samples is reflected in the non-chondritic Y/Ho and Zr/Hf ratios and the irregular REE patterns, which appear related to the tetrad effect phenomenon. The chondrite-normalized REE distribution patterns indicate both concave （W-shaped） and convex （M-shaped） tetrad effects in the argillic samples. Based on the field evidence and the results from geochemical studies, it can be concluded that the samples from the argillic alteration zone having high fourth tetrad effect values （〉0.30） were developed in the fault and breccia zones. The results indicate that factors such as preferential scavenging by Mn-oxides, crystallization of clay minerals, fluid-rock interaction, overprint of hypogene mineral assemblage by supergene ones, and the structural control, have all played an important role in the occurrence of tetrad effects in samples of the argillic zone in the Jizvan district.

关键词： REE geochemistry tetrad effect argillic alteration Jizvan Iran

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REE Tetrad Effect as a Powerful Indicator of Formation Conditions of Karst Bauxites: A Case Study of the Shahindezh Deposit, NW Iran

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 912-927页

作者： Ali ABEDINI mansour REZAEI AZIZI Ali Asghar CALAGARI Department of Geology Faculty of SciencesUrmia University*** UrmiaIran Department of Earth Sciences Faculty of Natural SciencesUniversity of Tabriz*** TabrizIran

Study of the concentration of major,trace,and rare earth elements(REE)in the Shahindezh karst bauxite deposit,northwestern Iran clarifies the relationship of the tetrad effect with geochemical parameters in the bauxite *** existence of irregular curves in the chondrite-normalized REE patterns as well as non-CHARAC behavior of geochemically isovalent pairs(Y/Ho)are related to the tetrad *** meaningful positive correlation between the sizes of the calculated T3 tetrad effect and some geochemical factors such as Y/Ho,ΣREE,La/Y,(La/Yb)N,and(LREE/HREE)N as well as some major oxides-based parameters like Al2O3+LOI/SiO2+Fe2O3,Al2O3/Fe2O3,Al2O3+LOI,IOL,and SiO2+Fe2O3indicate that the studied bauxite horizon was likely deposited by different(acidic and/or alkalic)solutions at different *** lower part of the studied horizon with a thickness of^4.7 m displays alkali characteristics whereas the upper parts of the horizon with a thickness of^5.3 m are characterized by more acidic *** results are fully supported by the co-occurrence of convex-concave tetrad effect curves in the chondrite-normalized REE ***,the tetrad effect phenomenon used in this study has proved to be a good and reliable geochemical proxy to assess the conditions of the depositional environment in the Shahindezh bauxite ores.

关键词： Geochemistry REE Tetrad effect Karst bauxite Shahindezh Iran

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Natural Language Processing with Optimal Deep Learning Based Fake News Classification

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Computers, Materials & Continua 2022年第11期73卷 3529-3544页

作者： Sara AAlthubiti Fayadh Alenezi Romany F.mansour Department of Computer Science College of Computer and Information SciencesMajmaah UniversityAl-Majmaah11952Saudi Arabia Department of Electrical Engineering College of EngineeringJouf UniversitySaudi Arabia Department of Mathematics Faculty of ScienceNew Valley UniversityEl-Kharga72511Egypt

The recent advancements made in World Wide Web and social networking have eased the spread of fake news among people at a faster *** most of the times,the intention of fake news is to misinform the people and make manipulated societal *** spread of low-quality news in social networking sites has a negative influence upon people as well as the *** order to overcome the ever-increasing dissemination of fake news,automated detection models are developed using Artificial Intelligence(AI)and Machine Learning(ML)*** latest advancements in Deep Learning(DL)models and complex Natural Language Processing(NLP)tasks make the former,a significant solution to achieve Fake News Detection(FND).In this background,the current study focuses on design and development of Natural Language Processing with Sea Turtle Foraging Optimizationbased Deep Learning Technique for Fake News Detection and Classification(STODL-FNDC)*** aim of the proposed STODL-FNDC model is to discriminate fake news from legitimate news in an effectual *** the proposed STODL-FNDC model,the input data primarily undergoes pre-processing and Glove-based word ***,STODL-FNDC model employs Deep Belief Network(DBN)approach for detection as well as classification of fake ***,STO algorithm is utilized after adjusting the hyperparameters involved in DBN model,in an optimal *** novelty of the study lies in the design of STO algorithm with DBN model for *** order to improve the detection performance of STODL-FNDC technique,a series of simulations was carried out on benchmark *** experimental outcomes established the better performance of STODL-FNDC approach over other methods with a maximum accuracy of 95.50%.

关键词： Natural language processing text mining fake news detection deep belief network machine learning evolutionary algorithm

Steganography-Based Transmission of Medical Images Over Unsecure Network for Telemedicine Applications

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Computers, Materials & Continua 2021年第9期68卷 4069-4085页

作者： Romany F.mansour Moheb R.Girgis Department of Mathematics Faculty of ScienceNew Valley UniversityEl-Kharga72511Egypt Department of Computer Science Faculty of ScienceMinia UniversityEl-MiniaEgypt

Steganography is one of the best techniques to hide secret *** steganography methods are available that use an image as a cover object,which is called image *** image steganography,the major features are the cover object quality and hiding data *** to poor image quality,attackers could easily hack the secret ***,the hidden data quantity should be improved,while keeping stego-image quality *** main aim of this study is combining several steganography techniques,for secure transmission of data without leakage and unauthorized *** this paper,a technique,which combines various steganographybased techniques,is proposed for secure transmission of secret *** the pre-processing step,resizing of cover image is performed with Pixel Repetition Method(PRM).Then DES(Data Encryption Standard)algorithm is used to encrypt secret data before embedding it into cover *** encrypted data is then converted to hexadecimal *** is followed by embedding using Least Signification Bit(LSB)in order to hide secret data inside the cover ***,image de-noising using Convolutional Neural Network(CNN)is used to enhance the cover image with hidden encrypted *** Zerotrees of Wavelet Transform is used to compress the image in order to reduce its *** are conducted to evaluate the performance of proposed combined steganography technique and results indicate that the proposed technique outperforms all existing *** achieves better PSNR,and encryption/decryption times,than existing methods for medical and other types of images.

关键词： Steganography secure data transmission CNN encryption telemedicine

Aflatoxins,hepatocellular carcinoma and public health

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World Journal of Gastroenterology 2013年第10期19卷 1508-1512页

作者： Arvin Magnussen mansour A Parsi Sandefjord High School 3228 SandefjordNorway Section for Therapeutic and Pancreatobiliary Endoscopy Digestive Disease InstituteCleveland ClinicClevelandOH 44195United States

Hepatocellular carcinoma(HCC) is one of the leading causes of cancer deaths worldwide,primarily affecting populations in the developing ***,a food contaminant produced by the fungi Aspergillus flavus and Aspergillus parasiticus,is a known human carcinogen that has been shown to be a causative agent in the pathogenesis of *** can affect a wide range of food commodities including corns,oilseeds,spices,and tree nuts as well as milk,meat,and dried *** factors affect the growth of Aspergillus fungi and the level of aflatoxin contamination in *** stress is one of the factors that increase susceptibility of plants to Aspergillus and thus aflatoxin contamination.A recent drought is thought to be responsible for finding of trace amounts of aflatoxin in some of the corn harvested in the United *** it's too soon to know whether aflatoxin will be a significant problem,since United States is the world's largest corn producer and exporter,this has raised alarm *** regulations and testing of finished foods and feeds in the United States should prevent a major health scare,and prevent human exposure to deleterious levels of ***,such regulations and testing are not in place in many *** purpose of this editorial is to summarize the current knowledge on association of aflatoxin and HCC,encourage future research and draw attention to this global public health issue.

关键词： Aflatoxins Hepatocellular carcinoma Environmental health Food safety Public health

Cyclical mastalgia: Prevalence and associated determinants in Hamadan City, Iran

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Asian Pacific Journal of Tropical Biomedicine 2016年第3期6卷 275-278页

作者： Fatemeh Shobeiri Khodayar Oshvandi mansour Nazari Mother and Child Care Research Center Hamadan University of Medical Sciences Department of Medical Entomology School of Medicine Hamadan University of Medical Sciences

Objective: To assess prevalence of cyclical mastalgia and its main determinants in women who attended in health centers of Hamadan City, ***: This case–control study was conducted on 400 women(case: cyclical mastalgia, n = 240; control: without cyclical mastalgia, n = 160) who attended family planning clinic for routine follow-up in health centers. The cluster sampling was *** was collected by interviewing and using a standardized validated questionnaire. Severity of mastalgia was assessed through using visual analog scaling. Data processing and statistical analysis were performed by using SPSS ***: The results revealed that majority of women(60.0%) experienced cyclical *** of these, 22.5% and 37.5% were mild and moderate-to-severe mastalgia, respectively. No association was revealed in experience of depression and anxiety in mastalgia group. In a multivariable logistic regression model, the increasing age, age of marriage, history of abortion and history of premenstrual syndrome were main determinants of mastalgia, while use of oral contraceptive and regular exercise was associated with lower incidence of ***: Most of women with breast discomfort suffered cyclical mastalgia which severity can be determined by advanced age, age of marriage, history of abortion and history of premenstrual syndrome, but inversely by oral contraceptive use and exercise activity.

关键词： Cyclical mastalgia Iran Prevalence Case–control study Associated determinants

Computer Vision with Machine Learning Enabled Skin Lesion Classification Model

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Computers, Materials & Continua 2022年第10期73卷 849-864页

作者： Romany F.mansour Sara A.Althubiti Fayadh Alenezi Department of Mathematics Faculty of ScienceNew Valley UniversityEl-Kharga72511Egypt Department of Computer Science College of Computer and Information SciencesMajmaah UniversityAl-Majmaah11952Saudi Arabia Department of Electrical Engineering College of EngineeringJouf UniversitySakaka72388Saudi Arabia

Recently,computer vision(CV)based disease diagnosis models have been utilized in various areas of *** the same time,deep learning(DL)and machine learning(ML)models play a vital role in the healthcare sector for the effectual recognition of diseases using medical imaging *** study develops a novel computer vision with optimal machine learning enabled skin lesion detection and classification(CVOML-SLDC)*** goal of the CVOML-SLDC model is to determine the appropriate class labels for the test dermoscopic ***,the CVOML-SLDC model derives a gaussian filtering(GF)approach to pre-process the input images and graph cut segmentation is ***,firefly algorithm(FFA)with EfficientNet based feature extraction module is applied for effectual derivation of feature ***,naïve bayes(NB)classifier is utilized for the skin lesion detection and classification *** application of FFA helps to effectually adjust the hyperparameter values of the EfficientNet *** experimental analysis of the CVOML-SLDC model is performed using benchmark skin lesion *** detailed comparative study of the CVOML-SLDC model reported the improved outcomes over the recent approaches with maximum accuracy of 94.83%.

关键词： Skin lesion detection dermoscopic images machine learning deep learning graph cut segmentation EfficientNet

Contact and hybrid zone hotspots and evolution of birds in the Middle East

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Progress in Natural Science:Materials International 2007年第9期17卷 1114-1118页

作者： mansour Aliabadian Mohammad Kaboli Bahram Kiabi Vincent Nijman Institute for Biodiversity and Ecosystem Dynamics Zoological MuseumUniversity of Amsterdam1090 GT AmsterdamThe NetherlandsDepartment of BiologyFaculty of SciencesFeredowsi UniversityMashadIran Department of Fishery and Environment Faculty of Natural ResourcesTehran UniversityIran Department of Biology Faculty of SciencesUniversity of Shahid BeheshtiTehranIran Institute for Biodiversity and Ecosystem Dynamics Zoological MuseumUniversity of Amsterdam1090 GT AmsterdamThe Netherlands

The Middle East is an important contact zone for a considerable number of bird taxa from the western and eastern Palearctic and from the great Saharo-Sindian desert *** WORLDMAP software,we analyzed the geographical distribution of secondary contact zones for parapatric species pairs of birds in the Middle *** identified 56 species(29 species pairs)that make contact in the Middle *** species pairs belong to three orders,***,Piciformes,and *** half(46%)of these species pairs hybridize in their contact *** contact zones occur over a large part of northern Middle East,spatially they were not evenly *** zone richness was highest in the mountain ranges south of the Caspian Sea and the *** hottest hotspots,where up to nine bird species pairs occur sympatrically,are situated in north-eastern Iran and *** discuss the relevance of these hotspots for improving our understanding of the biogeography and evolution of the avifauna in the Middle East.

关键词： contact zone hybridisation Middle East parapatry species-pairs zoogeography

Identity Governance Framework for Privileged Users

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Computer Systems Science & Engineering 2022年第3期40卷 995-1005页

作者： mansour Hammoud Alruwies Shailendra Mishra Mohammed Abdul Rahman AlShehri Department of Information Technology College of Computer and Information SciencesMajmaah UniversityAl-Majmaah11952Saudi Arabia Department of Computer Engineering College of Computer and Information SciencesMajmaah UniversityMajmaah11952Saudi Arabia

Information technology companies have grown in size and recognized the need to protect their valuable *** a result,each IT application has its authentication mechanism,and an employee needs a username and *** the number of applications increased,as a result,it became increasingly complex to manage all identities like the number of usernames and passwords of an *** identities had to be retrieved by *** the identities and the access rights associated with those identities had to be protected by an *** couldn’t even capture such access rights because they couldn’t verify things like privacy and *** management can help solve this *** concept behind identity management is to centralize identity management and manage access identity centrally rather than multiple applications with their authentication and authorization *** this research work,we develop governance and an identity management framework for information and technology infrastructures with privileged access management,consisting of cybersecurity policies and *** results show the efficiency of the framework compared to the existing information security *** integrated identity and access management and privileged access management enable organizations to respond to incidents and facilitate *** can automate use cases that manage privileged accounts in the real world.

关键词： Privileged access management(PAM) lightweight directory access protocol(LDAP) identity management access control cyber-attack