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Geochemistry and spectrometric prospection of younger granites and granitic pegmatites bearing uranium mineralization at *** El Rakeb area, Central Eastern Desert, Egypt

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Acta Geochimica 2021年第4期40卷 575-601页

作者： Gehad M.Saleh Bahaa M.emad Ibrahim B.Abdel Kader Nuclear Materials Authority El MaadiP.O.Box 530CairoEgypt

The present study deals with the detailed field geology,mineralogy,geochemistry,and spectrometric prospection of rare metals and radioactive minerals associated with granitic pegmatites in the Gabal Um LassafAbu Dob-Um Atelia-Kadabora-Kab El Rakeb area(LDAKK),which are situated in the central Eastern Desert of *** study area is composed of granodiorites and *** latter is dissected by granitic pegmatites with a discriminatory distribution of economically important mineralization(rare-metals and U-Th minerals).The granitic pegmatites display a zoning structure composed of feldspar-rich zones enveloping pockets of mica(mostly muscovite) and all zoning internal quartz ***,the monzogranite and granitic pegmatites are composed of potash-feldspar,albite,and quartz with a small amount of biotite and *** mineralogical investigation of the highly radioactive zones in the granitic pegmatite shows enrichment in kasolite,uranothorite,thorite,xenotime,columbite,zircon,bismuth,and ***,the granitic pegmatites are enriched with high field strength elements(HFSE;Zr,Nb,Th,and U) and ion lithophilic elements(LILE;Rb,and Pb) and depleted in Ba,Sr,and *** are strongly peralkaline to metalumainous except for two samples,which are *** are formed by partial melting of metagreywackes at *** studied granitic pegmatites could belong to the NYF family(Niobium-Yttrium-Fluorine family) according to the geochemistry of the trace *** studied granitic pegmatites show deep negative Eu anomaly and display a strong M-type tetrad effect of rare earth *** field spectroscopy measurements showed the localization of the radiometric anomalous associated with the granitic pegmatites,which are intruded in the granitic host *** eU and eTh contents reached up to 316 and 1367 ppm,*** and thorium occurrences in the investigated granitic pegmatites are related to magmatic(syngenetic)ori

关键词： Geochemistry Gabal Um Lassaf-Abu Dob-Um Atelia-Kadabora-Kab El Rakeb area(LDAKK) Uranium REE Egypt

Fine-Grained Soft Ear Biometrics for Augmenting Human Recognition

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Computer Systems Science & Engineering 2023年第11期47卷 1571-1591页

作者： Ghoroub Talal Bostaji emad Sami Jaha Department of Computer Science Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddahSaudi Arabia

Human recognition technology based on biometrics has become a fundamental requirement in all aspects of life due to increased concerns about security and privacy ***,biometric systems have emerged as a technology with the capability to identify or authenticate individuals based on their physiological and behavioral *** different viable biometric modalities,the human ear structure can offer unique and valuable discriminative characteristics for human recognition *** recent years,most existing traditional ear recognition systems have been designed based on computer vision models and have achieved successful ***,such traditional models can be sensitive to several unconstrained environmental *** such,some traits may be difficult to extract automatically but can still be semantically perceived as soft *** research proposes a new group of semantic features to be used as soft ear biometrics,mainly inspired by conventional descriptive traits used naturally by humans when identifying or describing each ***,the research study is focused on the fusion of the soft ear biometric traits with traditional(hard)ear biometric features to investigate their validity and efficacy in augmenting human identification *** proposed framework has two subsystems:first,a computer vision-based subsystem,extracting traditional(hard)ear biometric traits using principal component analysis(PCA)and local binary patterns(LBP),and second,a crowdsourcing-based subsystem,deriving semantic(soft)ear biometric *** feature-level fusion experiments were conducted using the AMI database to evaluate the proposed algorithm’s *** obtained results for both identification and verification showed that the proposed soft ear biometric information significantly improved the recognition performance of traditional ear biometrics,reaching up to 12%for LBP and 5%for PCA descriptors;when fusing all three capa

关键词： Ear biometrics soft biometrics human ear recognition semantic features feature-level fusion computer vision machine learning

Role of colonoscopy in patients with persistent acute diverticulitis

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World Journal of Gastroenterology 2008年第17期14卷 2763-2766页

作者： Adi Lahat Henit Yanai emad Sakhnini Yoram Menachem Simon Bar-Meir Department of Gastroenterology ChaimSheba Medical Center and Sackler School of Medicine Tel AvivUniversity

AIM： To identify patients with persistent acute diverticulitis who might benefit from an early colonoscopy during their first hospitalization. METHODS： All patients hospitalized between July 2000 and December 2006 for acute diverticulitis who underwent colonoscopy were included in the study. Patients were followed during hospitalization and after discharge. Patients were considered to have a persistent course of acute diverticulitis if symptoms continued after 1 wk of conventional treatment with 1V antibiotics, or if symptoms recurred within 2 mo after discharge. Patients were considered to benefit from an early colonoscopy if the colonoscopy was therapeutic or if it changed a patient＇s outcome. RESULTS： Three hundred and six patients were hospitalized between July 2000 and December 2006 with the diagnosis of acute diverticulitis. Two hundred and twenty four of these were included in the study group. Twenty three patients （10.3%） fulfilled the criteria for a persistent course of acute diverticulitis. Of them, four patients （17.4%） clearly benefited from an early colonoscopy; these patients＇ clinical course is described. None of the patients with a regular non-persistent course demonstrated any benefit from colonoscopy. CONCLUSION： Early colonoscopy detected other significant pathology, which accounted for the clinical presentation in 17% of patients with persistent acute diverticulitis. Therefore, we believe an early colonoscopy should be considered in all patients with a persistent clinical course.

关键词： Persistent acute diverticulitis Early colonoscopy Clinical course

捕集数对碳酸盐岩油藏生物聚合物驱采收率的影响

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石油勘探与开发 2022年第4期49卷 778-786页

作者： AL-SHALABI emad W 阿联酋哈利法科技大学石油工程学院阿布扎比127788阿联酋

基于储集层岩石和流体数据,采用一维数值模拟方法,研究捕集数对碳酸盐岩油藏裂褶菌多糖生物聚合物驱提高采收率的影响。对不可及孔隙体积、生物聚合物吸附量、渗透率降低系数、剪切速率系数、注入水硬度以及捕集数进行敏感性分析,与岩... 详细信息

基于储集层岩石和流体数据,采用一维数值模拟方法,研究捕集数对碳酸盐岩油藏裂褶菌多糖生物聚合物驱提高采收率的影响。对不可及孔隙体积、生物聚合物吸附量、渗透率降低系数、剪切速率系数、注入水硬度以及捕集数进行敏感性分析,与岩心驱替实验采收率数据进行历史拟合。结果表明,不可及孔隙体积、生物聚合物吸附量、渗透率降低系数、剪切速率系数和注入水硬度对生物聚合物驱提高采收率的影响可以忽略不计,且在其典型值范围内无法与采收率数据实现历史拟合。当通过毛细管去饱和曲线模型考虑捕集数影响时,残余油饱和度从不考虑捕集数影响或低捕集数条件下的25.1%降低到10.0%,采收率拟合效果较好。因此,为了更好地对碳酸盐岩油藏生物聚合物驱进行模拟研究,不能忽略捕集数影响。

关键词：碳酸盐岩油藏生物聚合物驱裂褶菌多糖生物聚合物捕集数提高采收率

Emphysematous sloughed floating ball after prostate water vaporization Rezum:A case report

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世界临床病例杂志 2023年第23期11卷 5525-5529页

作者： Mansour Alnazari Abdulaziz Bakhsh emad Sabri Rajih Department of Urology Taibah UniversityMadinah 16655Al MadinahSaudi Arabia Urology Section Department of SurgeryKing Faisal Specialist Hospital&Research CenterMadinahSaudi Arabia

BACKGROUND Rezūm™water vapor therapy is a new minimally invasive endoscopic technology for the management and treatment of benign prostatic *** SUMMARY A 63-year-old male presented to our department with severe dysuria,frequency,urgency,and interrupted stream 2 mo after receiving Rezūm™*** symptoms were caused by a retained floating emphysematous necrotic sloughed *** also discovered a persistent bacterial infection that was resistant to parenteral antimicrobial *** treatment of the patient included surgical removal of the necrotic *** Despite the good safety profile and minimal adverse events related to Rezūm™therapy,major complications can still occur.

关键词： Benign prostatic hyperplasia Rezum Lower urinary tract symptoms Minimally invasive therapy Water vapor therapy Transurethral resection of the prostate Case report

Cellular and molecular aspects of gastric cancer

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World Journal of Gastroenterology 2006年第19期12卷 2979-2990页

作者： Malcolm G Smith Georgina L Hold Eiichi Tahara emad M El-Omar Department of Medicine and Therapeutics Aberdeen University ForesterhillAberdeen AB25 2ZDScotlandUnited Kingdom

Gastric cancer remains a global killer with a shifting burden from the developed to the developing world. The cancer develops along a multistage process that is defined by distinct histological and pathophysiological phases. Several genetic and epigenetic alterations mediate the transition from one stage to another and these include mutations in oncogenes, tumour suppressor genes and cell cycle and mismatch repair genes. The most significant advance in the fight against gastric caner came with the recognition of the role of Helicobacter pylori （H pylori） as the most important acquired aetiological agent for this cancer. Recent work has focussed on elucidating the complex host/microbial interactions that underlie the neoplastic process. There is now considerable insight into the pathogenesis of this cancer and the prospect of preventing and eradicating the disease has become a reality. Perhaps more importantly, the study of H pylori-induced gastric carcinogenesis offers a paradigm for understanding more complex human cancers. In this review, we examine the molecular and cellular events that underlie Hpyloriinduced gastric cancer.

关键词： Gastric cancer Helicobacter pylori Hostmicrobial interactions Inflammation Molecular mechanisms Host genetics

An Efficient Hybrid PAPR Reduction for 5G NOMA-FBMC Waveforms

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Computers, Materials & Continua 2021年第12期69卷 2967-2981页

作者： Arun Kumar Sivabalan Ambigapathy Mehedi Masud emad Sami Jaha Sumit Chakravarty Kanchan Sengar Department of Electronics and Communication Engineering JECRC UniversityJaipur303905India Center for System Design Chennai Institute of TechnologyIndia Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia Department of Computer Science Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddahSaudi Arabia Department of Electrical and Computer Engineering Kennesaw State UniversityGAUSA

The article introduces Non-Orthogonal Multiple Access(NOMA)and Filter Bank Multicarrier(FBMC),known as hybrid waveform(NOMAFBMC),as two of the most deserving contenders for fifth-generation(5G)*** spectrum access and clampdown of spectrum outflow are unique characteristics of hybrid *** compare the spectral efficiency of Orthogonal Frequency Division Multiplexing(OFDM),FBMC,NOMA,and *** is seen that the hybrid waveform outperforms the existing *** to Average Power Ratio(PAPR)is regarded as a significant issue in multicarrier *** combination of Selective Mapping-Partial Transmit Sequence(SLM-PTS)is an effective way to minimize large peak power *** SLM,PTS,and SLM-PTS procedures are applied to the NOMA-FBMC *** hybrid structure is applied to the existing ***,the correlated factors like Bit Error Rate(BER)and Computational Overhead(CO)are studied and computed for these *** outcome of the work reveals that the NOMA-FBMC waveform coupled with the SLM-PTS algorithm offers superior performance as compared to the prevailing systems.

关键词： 5G NOMA-FBMC SLM-PTS PAPR BER OFDM

Disturbance Evaluation in Power System Based on Machine Learning

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Computers, Materials & Continua 2022年第4期71卷 231-254页

作者： emad M.Ahmed Mohamed A.Ahmed Ziad M.Ali Imran Khan Department of Electrical Engineering College of EngineeringJouf UniversitySakaka72388Al-JoufSaudi Arabia Department of Electrical Engineering College of EngineeringPrince Sattam bin Abdulaziz UniversityWadi Addawaser11991Saudi Arabia Department of Electrical Engineering Aswan Faculty of EngineeringAswan UniversityAswan81542Egypt Department of Electrical Engineering University of Engineering and Technology PeshawarPakistan

The operation complexity of the distribution system increases as a large number of distributed generators(DG)and electric vehicles were introduced,resulting in higher demands for fast online reactive power *** a power system,the characteristic selection criteria for power quality disturbance classification are not *** classification effect and efficiency needs to be improved,as does the generalization *** order to categorize the quality in the power signal disturbance,this paper proposes a multi-layer severe learning computer auto-encoder to optimize the input weights and extract the characteristics of electric power quality ***,a multi-label classification algorithm based on rating is proposed to understand the relationship between the labels and identify the various power quality *** two algorithms are combined to construct a multi-label classification model based on a multi-level extreme learning machine,and the optimal network structure of the multi-level extreme learning machine as well as the optimal multi-label classification threshold are *** proposed method can be used to classify the single and compound power quality disturbances with improved classification effect,reliability,robustness,and anti-noise performance,according to the experimental *** hamming loss obtained by the proposed algorithm is about 0.17 whereas ML-RBF,SVM and ML-KNN schemes have 0.28,0.23 and 0.22 respectively at a noise intensity of 20 *** average precision obtained by the proposed algorithm 0.85 whereas the ML-RBF,SVM and ML-KNN schemes indicates 0.7,0.77 and 0.78 respectively.

关键词： Optimal power flow optimization algorithm deep learning power systems

Linewidth narrowing in self-injection-locked on-chip lasers

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Light(Science & Applications) 2023年第10期12卷 2074-2083页

作者： emad Alkhazraji Weng W.Chow Frédéric Grillot John E.Bowers Yating Wan Integrated Photonics Lab King Abdullah University of Science and TechnologyThuwal 23955Saudi Arabia Sandia National Laboratories AlbuquerqueNM 87185-1086USA LTCI Télécom ParisInstitut Polytechnique de Paris91120 PalaiseauFrance Department of Electronic and Computer Engineering University of California-Santa BarbaraSanta BarbaraCA 93106USA

Stable laser emission with narrow linewidth is of critical importance in many applications,including coherent communications,LIDAR,and remote *** this work,the physics underlying spectral narrowing of self-injection-locked on-chip lasers to Hz-level lasing linewidth is investigated using a composite-cavity *** integrated III–V/SiN lasers operating with quantum-dot and quantum-well active regions are analyzed with a focus on the effects of carrier quantum *** intrinsic differences are associated with gain saturation and carrier-induced refractive index,which are directly connected with 0-and 2-dimensional carrier densities of *** from parametric studies are presented for tradeoffs involved with tailoring the linewidth,output power,and injection current for different device *** both quantum-well and quantum-dot devices show similar linewidth-narrowing capabilities,the former emits at a higher optical power in the self-injection-locked state,while the latter is more ***,a multi-objective optimization analysis is provided to optimize the operation and design *** the quantum-well laser,minimizing the number of quantum-well layers is found to decrease the threshold current without significantly reducing the output *** the quantum-dot laser,increasing the quantum-dot layers or density in each layer increases the output power without significantly increasing the threshold *** findings serve to guide more detailed parametric studies to produce timely results for engineering design.

关键词： narrowing injection quantum