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

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

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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

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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

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Adomian Decomposition Method with Green’s Function for Solving Tenth-Order Boundary Value Problems

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Applied Mathematics 2014年第10期5卷 1437-1447页

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

In this paper, the Adomian decomposition method with Green’s function (Standard Adomian and Modified Technique) is applied to solve linear and nonlinear tenth-order boundary value problems with boundary conditions defined at any order derivatives. The numerical results obtained with a small amount of computation are compared with the exact solutions to show the efficiency of the method. The results show that the decomposition method is of high accuracy, more convenient and efficient for solving high-order boundary value problems.

关键词： Adomian Decomposition Method Adomian’s Polynomials Tenth-Order Boundary Value Problems Green’s Function

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Visual rehabilitation in low-moderate keratoconus:intracorneal ring segment implantation followed by same-day topography-guided photorefractive keratectomy and collagen cross linking

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International Journal of Ophthalmology(English edition) 2014年第5期7卷 800-806页

作者： Ferial M.Zeraid Asma A Jawkhab waleed S al-Tuwairqi Uchechukwu L.Osuagwu Department of Optometry&Vision Sciences College of Applied Medical SciencesKing Saud University Senior Ophthalmology Consultant Elite Medical&Surgical CenterUlaya School of Optometry&Vision Science and Institute of Health&Biomedical Innovation Chronic Disease and Aging DomainQueensland University of Technology

AIMTo present the results of same-day topography-guided photorefractive keratectomy (TG-PRK) and corneal collagen crosslinking (CXL) after previous intrastromal corneal ring segment (ISCR) implantation for keratoconus.

关键词： keratoconus astigmatism photorefractive keratectomy corneal collagen crosslinking intrastromal corneal rings

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Can we suppress excessive post-surgical scar formation:A case report

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World Journal of Orthopedics 2023年第3期14卷 166-170页

作者： Mir Sadat-ali Sulaiman A al-Mousa Khalid waleed al-Tabash Mohamed M Abotaleb Fawaz M al-Anii Department of Orthopaedic Surgery Imam Abdulrahman Bin Faisal UniversityDammam 31142Saudi Arabia

BACKGROUND Hypertrophic scars(HSs)formation is a complication that occurs after wounds heal with secondary intention and sometimes after clean surgical *** treatments are in vogue now with varying *** the mechanism or mechanisms that cause a HS to form are not clearly understood,one thing that is clear is that once scar tissue matures,any intervention will not be *** this paper,we report on a case where a patient who was known to develop HS was treated with a new combination of ingredients(Phyto-chemicals+Silicone JUMI)to suppress HS *** SUMMARY A 68-year-old female of African descent presented a severe HS post total knee replacement(TKR),which the patient describes as itchy and *** to complications caused by the scar,she was apprehensive about undergoing TKR on her other ***,after the TKR of the contralateral side post-removal of skin clips,JUMI anti-scar cream(JASC)was used to suppress excessive scar *** JASC appears potent and efficacious at suppressing excessive scar *** believe that this warrants further studies on larger patient groups and on different surgical sites.

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Global output of research on epidermal parasitic skin diseases from 1967 to 2017

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Infectious Diseases of Poverty 2018年第1期7卷 730-739页

作者： waleed M.Sweileh Department of Physiology Pharmacology/ToxicologyDivision of Biomedical SciencesCollege of Medicine and Health SciencesAn-Najah National UniversityNablusPalestine

Background:Epidermal parasitic skin diseases(EPSD)occur in most countries and cause a considerable health and economic burden,particularly in the tropics and *** aim of this study was to assess and analyse peerreviewed literature on EPSD in *** results of this study serve as an indicator of the extent the scientific community,health authorities,and international health agencies interact with EPSD as a health problem that is commonly associated with poverty and poor ***:A bibliometric analysis methodology was *** Scopus database was used to retrieve documents about EPSD for the study period(1967-2017).The study focused on scabies,tungiasis,pediculosis,hookwormrelated cutaneous larva migrans(HrCLM),myiasis,and cutaneous *** that specifically and explicitly discuss EPSD in animals,aquatic organisms,and birds were ***:In total,4186 documents were retrieved.A fluctuated growth of publications on EPSD in the past five decades was *** retrieved documents received 43301 citations,an average of 10.3 citations per article and an h-index of *** keywords“scabies”and was the most commonly encountered keyword followed by the keywords“head lice”and“pediculosis”.The most active journal involved in publishing articles on EPSD was the International Journal of Dermatology(164;3.9%).Researchers from 93 different countries published the retrieved *** USA led with 735(17.6%)documents,followed by the UK(274;6.5%),and Germany(259;6.2%).In terms of institutions,the Charite-Universitätsmedizin Berlin in Germany was the most active in this field with 78(1.9%)publications,followed by the Universidade Federal do Cearáin Brazil with 52(1.2%)***:Research on scabies and pediculosis dominated the field of EPSD research to the expense of tungiasis,HrCLM,myiasis,and cutaneous *** was an underrepresentation of literature from the tropics and subtropics despite EPSD being com

关键词： Epidermal parasitic skin diseases Bibliometric analysis Keyword mapping Scopus

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Computer Forensics Framework for Efficient and Lawful Privacy-Preserved Investigation

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Computer Systems Science & Engineering 2023年第5期45卷 2071-2092页

作者： waleed Halboob Jalal almuhtadi Center of Excellence in Information Assurance King Saud UniversityRiyadh11653Saudi Arabia College of Computer and Information Sciences King Saud UniversityRiyadh11451Saudi Arabia

Privacy preservation(PP)in Digital forensics(DF)is a conflicted and non-trivial *** solutions use the searchable encryption concept and,as a result,are not efficient and support only a keyword ***,the collected forensic data cannot be analyzed using existing well-known digital *** research paper first investigates the lawful requirements for PP in DF based on the organization for economic co-operation and development OECB)privacy *** have an efficient investigation process and meet the increased volume of data,the presented framework is designed based on the selective imaging concept and advanced encryption standard(AES).The proposed framework has two main modules,namely Selective Imaging Module(SIM)and Selective Analysis Module(SAM).The SIM and SAM modules are implemented based on advanced forensic format 4(AFF4)and SleuthKit open source forensics frameworks,respectively,and,accordingly,the proposed framework is evaluated in a forensically sound *** evaluation result is compared with other relevant works and,as a result,the proposed solution provides a privacy-preserving,efficient forensic imaging and analysis process while having also sufficient ***,the AFF4 forensic image,produced by the SIM module,can be analyzed not only by SAM,but also by other well-known analysis tools available on the market.

关键词： Digital forensics digital evidence AFF4 privacy preservation selective imaging

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Adaptability of bipedicled scalp advancement flap for coverage of huge scalp defects after tumor resection

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Chinese Journal of Plastic and Reconstructive Surgery 2024年第1期6卷 16-21页

作者： waleed aldabaany Department of Plastic Surgery Faculty of MedicineFayoum UniversityFayoumEgypt

Background:Several reconstructive techniques have been used to reconstruct scalp *** researchers have studied the utilization of bipedicled scalp advancement flaps for scalp defect *** this study,we will assess the adaptability of a bipedicled scalp advancement flap for coverage of huge scalp defects after tumor ***:This study was performed at the Plastic Surgery Department,Fayoum University Hospital,on 20 patients with huge scalp tumors treated by adequate excision and reconstructed using a bipedicled scalp advancement flap from December 2021 to July ***:The study was conducted on 20 patients:16(80%)were men and 4(20%)were women presenting with large scalp *** mean age was 57.4 years(33-68 years).The sites of the tumors were 10(50%)occipital,6(30%)parietal,and 4(20%)*** major complications occurred postoperatively,and the bipedicled flaps survived well in all cases,with no ***:Huge scalp defects after tumor resection can be safely reconstructed with a large versatile bipedicled advancement scalp flap,either transversely or longitudinally oriented,with favorable functional results and accepted aesthetic results,apart from the alopecic area over the grafted donor site,which can be treated by tissue expansion if desired later.

关键词： Bipedicled advancement flap Huge scalp defects Tumor resection

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Solving <i>nth</i>-Order Integro-Differential Equations Using the Combined Laplace Transform-Adomian Decomposition Method

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Applied Mathematics 2013年第6期4卷 882-886页

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

In this paper, the Combined Laplace Transform-Adomian Decomposition Method is used to solve nth-order integro-differential equations. The results show that the method is very simple and effective.

关键词： Integro-Differential Equations Laplace Transform Method Adomian Decomposition Method

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