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Acta Geologica Sinica(English Edition) 2021年第6期95卷 2045-2062页

作者： waleed S.IBRAHIM Nuclear Materials Authority El MaadiCairoEgypt

The Wadi Ibib area is situated in the northern part of the Neoproterozoic Hamisana Shear Zone(HSZ), which is a high strain zone evolved during the late stages of the Pan-African orogeny, likely as a tectonic escape structure. Amphibolite facies pelitic metasedimentary windows crop out in the axial parts of the HSZ and are noticeably associated with numerous N-trending pegmatite dikes. Whole-rock geochemistry of the pegmatites reveals a peraluminous(S-type) affinity, with low K/Rb ratios and elevated concentrations of U, Th, REE, Rb, Li, Cs, Y, Nb and Ta. Structurally, the pegmatite sets intrude along the shear plane of the HSZ, corresponding to the regional N-trending tectonic fabrics, such as axial planar foliation and dextral-shearing in the metasedimentary host rock. Field relationships, including structural context, coupled with geochemical characteristics of the Wadi Ibib pegmatites, do not support their formation as a complementary part of evolved granitic magmas. Space-localized decompression-induced partial melting of peraluminous garnet-bearing metapelites was alternatively the underlying process for formation of these pegmatites. Such decompression was associated with regional escape tectonics and stress axes permutations during the late deformation stage(D3) in the evolution of the south Eastern Desert terrane, due to end-orogeny system pressure-release.

关键词： U-Th-REE mineralization anataxis pegmatite origin Hamisana Shear Zone Wadi Ibib Egypt

Multidrug resistance Acinetobacter species at the intensive care unit,Aseer Central Hospital,Saudi Arabia:A one year analysis

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Asian Pacific Journal of Tropical Medicine 2016年第9期9卷 881-885页

作者： ali al Bshabshe Martin R.P.Joseph ali al Hussein waleed Haimour Mohamed E.Hamid Department of Medicine College of MedicineKing Khalid University Department of Microbiology College of MedicineKing Khalid University Intensive Care Unit Aseer Central Hospital Microbiology Laboratories Aseer Central Hospital

Objective:To identify and to determine the antimicrobial susceptibility of Acinetobacter baumannii(***) clinical isolates from ICU at Aseer Central ***:The study was conducted in the Intensive Care Unit,Aseer Central Hospital,Saudi Arabia over 13 months period(2014-2015).Acinetobacter species(n= 105) were isolated from various clinical *** were identified using selected phenotypic criteria and confirmed using the Vitek 2 automated *** system was used to determine the susceptibilities of 21 antimicrobial ***,isolates and drug data were analyzed using the SPSS statistical software package to determine some epidemiological and microbiological ***:Of the 105 stains,*** accounted for 49(46.67%),*** complex,19(18.09%),***/haemolyticus 32(30.47),Acinetobacter haemolyticus 4(3.81%),Acinetobater lwoffii 1(0.95%) and unidentified Acinetobater species 2(1.3%).Of the 105 Acinetobacter strains,103(98.1%) were found multidrug resistant(MDR).*** strain were 100% sensitive to colistin and 74.5% to trimethoprim + *** remaining 19 antimicrobial agents revealed low or no sensitivities:amikacin 16.3%; ampicillin 7.7%; ceftazidime 7.3%.Distribution of similar sensitivities was shown by other Acinetobacter *** number of isolates from males and females indicates no statistical variation(P=0.867) whereas age groups showed significant differences(P= 0.008) as it is clear from the high percentage of infected individuals more than 60 years followed by those aged 20 to 29 years old(19.05%).Upper respiratory tract(30.48%),lower respiratory tract(47.65%) and subcutaneous tissue(9.5%) were the main sources of Acinetobacter *** mean numbers of isolates from these specimens indicate no discrepancy between specimens(P=0.731).Conclusions:Acinetobacterspecies including *** were found MDR(98.1%) according to the current Acinetobacter *** categorization.A

关键词： Acinetobacter spp. ICU Antimicrobials Aseer Central Hospital

Adaptive 3D descattering with a dynamic synthesis network

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Light(Science & Applications) 2022年第5期11卷 766-786页

作者： waleed Tahir Hao Wang Lei Tian Department of Electrical and Computer Engineering Boston UniversityBostonMA 02215USA Department of Biomedical Engineering Boston UniversityBostonMA 02215USA

Deep learning has been broadly applied to imaging in scattering applications.A common framework is to train a descattering network for image recovery by removing scattering *** achieve the best results on a broad spectrum of scattering conditions,individual“expert”networks need to be trained for each ***,the expert’s performance sharply degrades when the testing condition differs from the *** alternative brute-force approach is to train a“generalist”network using data from diverse scattering *** generally requires a larger network to encapsulate the diversity in the data and a sufficiently large training set to avoid ***,we propose an adaptive learning framework,termed dynamic synthesis network(DSN),which dynamically adjusts the model weights and adapts to different scattering *** adaptability is achieved by a novel“mixture of experts”architecture that enables dynamically synthesizing a network by blending multiple experts using a gating *** demonstrate the DSN in holographic 3D particle imaging for a variety of scattering *** show in simulation that our DSN provides generalization across a continuum of scattering *** addition,we show that by training the DSN entirely on simulated data,the network can generalize to experiments and achieve robust 3D *** expect the same concept can find many other applications,such as denoising and imaging in scattering ***,our dynamic synthesis framework opens up a new paradigm for designing highly adaptive deep learning and computational imaging techniques.

关键词： network scattering synthesis

Seismic performance of high-rise buildings in selected regions in Saudi Arabia according to different seismic codes

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Earthquake Engineering and Engineering Vibration 2021年第1期20卷 179-191页

作者： Sayed Mahmoud Mohamed alsearheed waleed Abdallah Department of Civil and Construction Engineering College of EngineeringImam Abdulrahman Bin Faisal UniversitySaudi Arabia Department of Building Engineering College of ArchitectureImam Abdulrahman Bin Faisal UniversitySaudi Arabia Department of Civil Engineering College of Engineering at MatariaHelwan UniversityCairoEgypt

The design code for each country is revised and updated based on an expected zone’s seismic intensities,geotechnical site classifications,structural systems,construction materials and methods of construction in order to provide more realistic considerations of seismic demand,seismic response,and seismic *** on the aforementioned provisions,structures designed according to different seismic codes may yield different performances for the same level of *** study aims to investigate and compare the induced responses related to the earthquake-resistant design of reinforced concrete(RC)buildings according to the Saudi building code(SBC-301),American code(ASCE-7),uniform building code(UBC-97),and European code(EC-8).In order to account for the provision regarding the hazard specification and its effect on the induced seismic responses,four regions in the Kingdom of Saudi Arabia with different seismic levels are *** code provisions related to the specification of site classification and its effect on the induced design base shear are investigated as *** differences are observed in the induced responses with the variation in seismic design codes for the considered seismic hazards and site classifications.

关键词： high-rise building SBC-301 international seismic codes seismic zones site classifications

Sudden death in the southern region of Saudi Arabia:A retrospective study

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World Journal of Clinical Cases 2023年第20期11卷 4843-4851页

作者： Ahmed Mohamed Ahmed al-Emam Abdulrahman Dajam Mohammed alrajhi waleed alfaifi Mubarak al-Shraim Ahmed Mohamed Helaly Department of Pathology College of MedicineKing Khalid UniversityAsir 61421Saudi Arabia Forensic Medicine and Clinical Toxicology Mansoura UniversityMansoura 35516Egypt Medical School King Khalid UniversityAsir 61421Saudi Arabia Clinical Science Faculty of MedicineYarmouk UniversityIrbid 21163Jordan

BACKGROUND Sudden death is unanticipated,non-violent death taking place within the first 24 h after the onset of *** is a major public health problem ***,the effects of living at moderate altitude on mortality are poorly *** To retrospectively report the frequency and the main causes of sudden deaths in relation to total deaths at Asir Central Hospital,2255 m above sea level,in the southern region of Saudi Arabia over a period of 4 years from 2013 to *** The medical records of 1821 deaths were examined and showed 353 cases(19.4%)of sudden *** The highest incidence of sudden death was among the elderly(51%),whereas,the lowest was among children and adolescents(6.5%).With regard to gender,the incidence of sudden death was higher in males(54.4%)compared to 45.6% in *** this study,we found that the most common direct causes of sudden death were cardiovascular diseases(29.2%),respiratory disease(22.7%),infectious disease(12.2%),cancer(9.4%)and hematological diseases(6.2%).With respect to seasonal variation,the highest incidence was during winter(31.32%)followed by summer(25.8%).CONCLUSION The results of this study will help emergency physicians and health care providers to exercise due care to reduce the incidence of sudden death and raise public awareness about the impact of sudden death.

关键词： Sudden death High altitude Cardiovascular Gender distribution Age Seasonal variation

Computational Methods for Single-cell DNA Methylome Analysis

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Genomics, Proteomics & Bioinformatics 2023年第1期21卷 48-66页

作者： waleed Iqbal Wanding Zhou Center for Computational and Genomic Medicine Children’s Hospital of PhiladelphiaPhiladelphiaPA 19104USA Department of Pathology and Laboratory Medicine University of PennsylvaniaPhiladelphiaPA 19104USA

Dissecting intercellular epigenetic differences is key to understanding tissue *** advances in single-cell DNA methylome profiling have presented opportunities to resolve this heterogeneity at the maximum *** these advances enable us to explore frontiers of chromatin biology and better understand cell lineage relationships,they pose new challenges in data processing and *** review surveys the current state of computational tools developed for single-cell DNA methylome data *** discuss critical components of single-cell DNA methylome data analysis,including data preprocessing,quality control,imputation,dimensionality reduction,cell clustering,supervised cell annotation,cell lineage reconstruction,gene activity scoring,and integration with transcriptome *** also highlight unique aspects of single-cell DNA methylome data analysis and discuss how techniques common to other single-cell omics data analyses can be adapted to analyze DNA ***,we discuss existing challenges and opportunities for future development.

关键词： Single-cell genomics Bioinformatics DNA methylation Computational tool Epigenetics

Global research trends in the microbiome related to irritable bowel syndrome: A bibliometric and visualized study

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World Journal of Gastroenterology 2021年第13期27卷 1341-1353页

作者： Sa'ed H Zyoud Simon Smale W Stephen Waring waleed Sweileh Samah W al-Jabi Poison Control and Drug Information Center(PCDIC) College of Medicine and Health SciencesAn-Najah National UniversityNablus 44839West BankPalestine Department of Clinical and Community Pharmacy College of Medicine and Health SciencesAn-Najah National UniversityNablus 44839West BankPalestine Department of Clinical Research Centre An-Najah National University HospitalNablus 44839West BankPalestine Department of Gastroenterology York HospitalYork Teaching Hospital NHS Foundation TrustYork YO318HEUnited Kingdom Acute Medical Unit York Teaching Hospitals NHS Foundation TrustYork YO318HEUnited Kingdom Department of Pharmacology and Toxicology College of Medicine and Health SciencesAn-Najah National UniversityNablus 44839West BankPalestine

BACKGROUND Irritable bowel syndrome(IBS) is a common functional gastrointestinal disorder. Dysregulation of the gut–brain axis plays a central role in the pathophysiology of IBS. It is increasingly clear that the microbiome plays a key role in the development and normal functioning of the gut–brain *** To facilitate the identification of specific areas of focus that may be of relevance to future research. This study represents a bibliometric analysis of the literature pertaining to the microbiome in IBS to understand the development of this *** The data used in our bibliometric analysis were retrieved from the Scopus database. The terms related to IBS and microbiome were searched in titles or abstracts within the period of 2000–2019. VOSviewer software was used for data *** A total of 13055 documents related to IBS were retrieved at the global level. There were 1872 scientific publications focused on the microbiome in IBS. There was a strong positive correlation between publication productivity related to IBS in all fields and productivity related to the microbiome in IBS(r = 0.951, P aly(n = 151, 8.1%). The h-index for all retrieved publications related to the microbiome in IBS was 138. The hot topics were stratified into four clusters:(1) The gut–brain axis related to IBS;(2) Clinical trials related to IBS and the microbiome;(3) Drugmediated manipulation of the gut microbiome;and(4) The role of the altered composition of intestinal microbiota in IBS *** This is the first study to evaluate and quantify global research productivity pertaining to the microbiome in IBS. The number of publications regarding the gut microbiota in IBS has continuously grown since 2013. This finding suggests that the future outlook for interventions targeting the gut microbiota in

关键词： Irritable bowel syndrome Bibliometric Microbiota Microbiome Scopus Brain gut axis

Laboratory study on efficiency of three calcium carbonate scale inhibitors in the presence of EOR chemicals

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Petroleum 2018年第4期4卷 375-384页

作者： Qiwei Wang Feng Liang waleed al-Nasser Faez al-Dawood Tawfiq al-Shafai Hameed al-Badairy Shouwen Shen Hassan al-Ajwad Saudi Aramco Research&Development CenterP.O.Box 62Dhahran 31311Saudi Arabia Aramco Services Company Aramco Research Center e Houston16300 Park RowHoustonTX 77084USA

Chemical flooding has been widely used in the oil industry since the 1980s for enhanced oil recovery(EOR)*** studies have shown that the effectiveness of calcium carbonate scale inhibitors is affected by many factors,such as water composition,system pressure,temperature,production rates,pH *** breakthrough of the EOR chemicals in the production well could also affect scale formation process and interfere with the scale treatment program as ***,the studies on the impacts of injected EOR chemicals to scale inhibitor performances are very *** paper presents the comprehensive laboratory study on the impacts of the EOR chemicals on CaCO3 scale formation and prevention using static bottle and dynamic tube blocking *** EOR chemicals used in this study are a combination of surfactants and *** different types of inhibitors were evaluated:triphosphonate,penta-phosphonate,and polyacrylate based ***(%)from the bottle test and minimum effective dose(MED)based on the tube blocking method were determined for each inhibitor at 160*** precipitates from the bottle tests were also characterized for morphology and polymorphs using environmental scanning electron(ESEM)and X-ray diffraction(XRD)*** suggest that the performance of scale inhibitors could be substantially affected by the EOR *** dynamic tube blocking tests,the MED values of inhibitors were increased roughly 10 times with the EOR *** static bottle tests showed considerable changes under the test *** impact of EOR chemicals were also demonstrated by the remarkable ranges of crystal morphologies,changing from simple aragonite columns to nanorod,distorted spheroid,and flower-like superstructure in the presence of EOR chemicals and inhibitors.

关键词： Calcium carbonate Scaling Inhibitor Chemical flooding Enhanced oil recovery

Fabrication of stable organometallic halide perovskite NWs based optoelectronic devices

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Science Bulletin 2017年第9期62卷 645-647页

作者： Aashir waleed Zhiyong Fan Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong China

Organometallic halide perovskite materials have triggered global attention in recent years due to their exciting and optimistic high performance energy conversion properties(high luminescence efficiency and tremendous optical absorption ability[1,2]).These interesting photovoltaic properties together make them a promising candidate for high performance optoelectronic

关键词： Fabrication of stable organometallic halide perovskite NWs based optoelectronic devices NH Pb

Daftardar-Jafari Method for Fractional Heat-Like and Wave-Like Equations with Variable Coefficients

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Applied Mathematics 2017年第2期8卷 215-228页

作者： waleed al-Hayani Department of Mathematics College of Computer Science and Mathematics University of Mosul Iraq

In this paper, Daftardar-Gejji and Jafari method is applied to solve fractional heat-like and wave-like models with variable coefficients. The method is proved for a variety of problems in one, two and three dimensional spaces where analytical approximate solutions are obtained. The examples are presented to show the efficiency and simplicity of this method.

关键词： Daftardar-Jafari Method Heat-Like Equations Wave-Like Equations Fractional Calculus