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Mafic and felsic magmatism in the Wadi Kalalat area, South Eastern Desert, Egypt: mineralogy, geochemistry and geodynamic evolution during the Neoproterozoic in the Nubian Shield

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Acta Geochimica 2024年第1期43卷 150-173页

作者： adel A.Surour Ahmed A.Madani mohamed A.El-Sobky Faculty of Science Galala UniversityNew Galala CitySuez 43511Egypt Department of Geology Faculty of ScienceCairo UniversityGiza 12613Egypt Egyptian Mineral Resources Authority P.O.Box 11517AbbasiyaCairoEgypt

In the south Eastern Desert of Egypt,two contrasting types of magmatism(mafic and felsic) are recorded in the Wadi Kalalat area,and form the Gabal El Motaghiarat and Gabal Batuga intrusions,*** two intrusions post-dates ophiolitic and arc associations represented by serpentinite and metagabbro-diorite,*** mafic intrusion has a basal ultramafic member represented by fresh peridotite,which is followed upward by olivine gabbro and anorthositic or *** mafic intrusion pertains to the Alaskan-type mafic-ultramafic intrusions in the Arabian-Nubian Shield(ANS)being of tholeiitic nature and emplaced in a typical arc *** the other hand,the Gabal Batuga intrusion comprises three varieties of fresh A-type granites of high K-calc alkaline nature,which is peraluminous and garnetbearing in parts.A narrow thermal aureole in the olivine gabbro of the mafic intrusion was developed due to the intrusion of the Batuga *** results in the development of a hornfelsic melagabbro variety in which the composition changed from tholeiitic to a calc-alkaline composition due to the addition of S_(i)O_(2),Al_(2)O_(3),alkalis,lithosphile elements(LILEs) such as Rb(70 ppm) and Y(28 ppm) from the felsic *** the thermal aureole,Rb amounts 2-8 ppm and Y lies in the range <*** is believed that the Gabal Batuga felsic intrusion started to emplace during the waning stage of an arc system,with transition from the pre-collisional(i.e.,arc setting) to post-collisional and within plate *** from which the Gabal Batuga granites were fractionated is high-K calc-alkaline giving rise to a typical post-collisional A-type granite(A_(2)-subtype) indicating an origin from an underplating crustal ***,it is stressed here that the younger granites in the ANS are not exclusively post-collisional and within-plate but most likely they started to develop before closure of the arc *** possible source(s) of mafic magmas

关键词： Wadi Kalalat Gabal El Motaghairat mafic intrusion Gabal Batuga felsic intrusion Arc setting Post-collision Within-plate

The Role of Dopamine in Associative Learning in Drosophila: An Updated Unified Model

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Neuroscience Bulletin 2021年第6期37卷 831-852页

作者： mohamed adel Leslie C.Griffith Department of Biology Volen National Center for Complex Systems and National Center for Behavioral GenomicsBrandeis UniversityWalthamMA 02454-9110USA

Learning to associate a positive or negative experience with an unrelated cue after the presentation of a reward or a punishment defines associative *** ability to form associative memories has been reported in animal species as complex as humans and as simple as insects and sea *** memory has even been reported in tardigrades[1],species that diverged from other animal phyla 500 million years *** the mechanisms of memory formation is a fundamental goal of neuroscience *** this article,we work on resolving the current contradictions between different Drosophila associative memory circuit models and propose an updated version of the circuit model that predicts known memory behaviors that current models do ***,we propose a model for how dopamine may function as a reward prediction error signal in Drosophila,a dopamine function that is well-established in mammals but not in insects[2,3].

关键词： associative contradiction function

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

Geochemistry of island arc assemblage in the Eastern Desert of Egypt and the role of Pan-African magmatism in crustal growth of the Arabian–Nubian Shield:A review

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Acta Geochimica 2024年第3期43卷 588-622页

作者： Abdel-Aal MAbdel-Karim mohamed MHamdy adel A.Surour Geology Department Faculty of ScienceZagazig UniversityZagazig 44519Egypt Geology Department Faculty of ScienceTanta UniversityTanta 31527Egypt Department of Geological Sciences Faculty of ScienceNew Galala City 43511Egypt Geology Department Faculty of ScienceCairo UniversityGiza 12613Egypt

Neoproterozoic island arc assemblage of the Arabian–Nubian Shield(ANS)in the Eastern Desert(ED)of Egypt comprises juvenile suites of metavolcanics(MV),large amounts of meta-sedimentary rocks(MS),and voluminous metagabbros-diorites(MGD)and syn-tectonic intrusions of older granitoids(OG).We report here the updates of these four rock units in terms of classification,distribution,chemical characteristics,geodynamic evolution,metamorphism,and *** addition,we discuss these integrated data to elucidate a reasonable and reliable model for crustal evolution in the *** main features of these rock units indicate their relation to each other and the geodynamic environment dominated by early immature oceanic island arcs to primitive continental *** information of the island arc metavolcanic and plutonic rocks(gabbros,diorites,tonalites,and granodiorites)furnish evidence of the genetic *** include proximity and a coeval nature in the field;all protolith magmas are subalkaline in nature following calc-alkaline series with minor tholeiitic affinities;common geochemical signature of the arc rocks and subduction-related magmatism;their similar enrichment in LREEs;and similar major element compositions with mafic melts derived from metasomatized mantle *** volcano-sedimentary and the OG rocks underwent multiphase deformation events whereas the MGD complexes deformed *** on the magmatic,sedimentological,and metamorphic evolutions constrained by geochronological data as well as the progressive evolutionary trend from extensional to compressional regimes,a possible gradual decrease in the subducted slab dip angle is the most infl uential in any geodynamic model for arc assemblage in the ED of Egypt.

关键词： Island arc assemblage Magmatism Crustal growth Neoproterozoic Arabian–Nubian Shield Eastern Desert Egypt

Genetic Variability and Phenotypic Correlations Study among Grain Quality Traits and Mineral Elements Concentrations in Colored and Non-Colored Rice (Oryza sativa L.)

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1733-1748页

作者： adel A.Rezk mohamed M.El-Malky Heba I.mohamed Hossam S.El-Beltagi Agricultural Biotechnology Department College of Agricultural and Food ScienceKing Faisal UniversityAl-Ahsa31982Saudi Arabia Plant Pathology Research Institute Agriculture Research CenterGiza12619Egypt Rice Research and Training Center Field Crop Research InstituteAgriculture Research Center33717Egypt Biological and Geological Sciences Department Faculty of EducationAin Shams UniversityCairo11511Egypt Biochemistry Department Faculty of AgricultureCairo UniversityGiza12613Egypt

Twenty-four rice genotypes were examined to assess genetic variability,heritability,and correlations for seven-grain quality traits,eight nutritional elements,and *** revealed signiﬁcant differences for the quality traits *** every trait under study,the phenotypic coefﬁcient of variation was higher than the correspon-dence genotypic coefﬁcient of *** in a broad sense varied from 29.75%for grain length to 98.31%for the elongation *** percentage recovery had a highly signiﬁcant positive correlation with milling and head rice ***,milling percentage had a highly positive correlation with head rice *** amylose percentage,all the genotypes belonged to low amylose except the Hassawi-1 variety,which had intermediate amylose *** nutrition contents of magnesium(Mg),sodium(Na),potas-sium(K),calcium(Ca),copper(Cu),manganese(Mn),zinc(Zn),iron(Fe),or protein percentage gave different variations for 24 rice genotypes under all the nutritional *** the 24 genotypes,ten rice genotypes–HighNutrient-1,HighNutrient-2,HighNutrient-9,HighNutrient-8,HighNutrient-3,Hassawi-2,HighNutrient-7,HighNutrient-6,Hassawi-1,and HighNutrient-4–had the highest heist value for all nutritional and protein con-tents,and could be used as a donor to improving new *** was a positive and signiﬁcant correlation between magnesium Mg,K,Zn and ***,K had a positive correlation with zinc Zn,Fe,and protein *** analysis was divided into two groups:theﬁrst group included all genotypes rich in nutri-ents,while the remaining genotypes with low nutritional content were included in the second group.

关键词： Amylose cluster analysis genotypes grain quality mineral nutrition rice

A Rare Case of Pyogenic Spondylodiscitis after Laparoscopic Sacro-Hysteropexy

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Open Journal of Obstetrics and Gynecology 2022年第6期12卷 510-514页

作者： adel mohamed Ismail Haitham Abdel Wahab Said Shaban Gyneoncology Department Ismailia Teaching Oncology Hospital Ismailia Egypt Gyneoncology Department El-Galaa Maternity Teaching Hospital Cairo Egypt

Introduction: Pyogenic spondylodiscitis is a rare and severe complication of laparoscopic Sacro-Hysteropexy with a polypropylene mesh. The proper and early diagnosis following by medical treatment, if not responding, so we shift to surgical approach is very important to prevent irreversible complications. Case Presentation: A female patient 32 years old admitted to our Gyne-Oncology unit in El-Galaa Maternity Teaching Hospital, in Jan 2022 with a significant weakness in both lower limbs up to complete paralysis, by history she has done a laparoscopic Hystero-Sacro-Pexy with synthetic polypropylene mesh 2 weeks ago, all investigations were normal except WBCs was 14,000 and CRP was 28, MRI Finding was an Encysted collection likely seroma at sacral promontory 4 × 3 cm, surgical removal of the mesh was done, the mesh related to the sacrum was severely infected and pus formation was noticed, 4 hours after the operation there was a Dramatic response and complete resolution of symptoms within few days. Conclusion: Because of the rarity of this complication in the literature, Spondylodiscitis awareness of symptoms, timely diagnosis, and treatment including surgical removal of synthetic mesh after Sacro-Pexy are fundamental to prevent irreversible complications.

关键词： Spondylodiscitis Pyogenic Sacro-Pexy Pecto-Pexy Mesh

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中国出口退税政策对中非贸易影响研究

中国出口退税政策对中非贸易影响研究

作者： Yara adel Hussein mohamed Ebrahem（林诗雨）上海财经大学

学位级别：硕士

中国的税制改革始于1994年,而且期间实行多次的退税政策进行调整,为了控制高污染和高能耗的贸易生产与出口,大幅度的税制改革就达到16次之多,对于贸易出口中的税收进行调整,降低了原材料在贸易出口中的份额,提高了具有高附加值的科技产... 详细信息

中国的税制改革始于1994年,而且期间实行多次的退税政策进行调整,为了控制高污染和高能耗的贸易生产与出口,大幅度的税制改革就达到16次之多,对于贸易出口中的税收进行调整,降低了原材料在贸易出口中的份额,提高了具有高附加值的科技产品在贸易出口中的份额,因此中国的税制改革对于经济具有一定的促进作用。中国实施退税制度对于同中国贸易的伙伴也具有一定的影响,本文通过对于中国出口退税与中非之间的贸易影响进行研究和分析,主要目的是了解中国的税制改革对于中非贸易之间产生了哪些作用,并根据研究提出相关的政策建议,从而更好的推动中国和非洲之间的贸易往来。首先,本文介绍了中国和非洲之间的贸易现状以及中国退税制度的实施,中国和非洲之间的贸易现状包括了两地之间的贸易规模、产品结构和区域结构等,值得注意的是,中国和非洲两地在贸易规模近20年都保持着十分高速的发展,在贸易结构上,中国向非洲贸易出口的商品以工业品为主,具有较高的附加值和高技术,而且这些高附加值、高技术的商品比重在持续增长。中国向非洲贸易进口的商品主要包括贵金属,石油,天然气,木材,有色金属,煤矿等原材料。在中非贸易区域上,中国同北非、南非和西非之间的贸易规模相对较大,中国同北非之间主要贸易进口商品为石油等原材料,贸易出口的商品以大型机械和电子产品为主。中国同南非之间主要贸易进口商品为金属和木材等原材料,贸易出口的商品以大型机械和初级产品为主。中国同西非之间主要贸易进口商品为石油和天然气等原材料,贸易出口的商品以大型机械和初级产品为主。中国同东非之间主要贸易进口商品为石油和天然气等原材料,贸易出口的商品以初级产品为主。从1994年到2020年的16年间,中国实施退税政策前前后后经历了16次大幅的调整,对于高污染和高能耗的企业取消和下调了退税税率,对于劳动密集型产业,下调了贸易出口退税率,但是对于高科技产品,高附加值产品提高了退税出口率,以此来鼓励中国发展科技。其次,本文基于贸易出口退税政策进行了相关的理论分析,通过理论来分析政策对于中国和非洲贸易之间的影响。通过对于前人的总结,退税政策对于中国和非洲之间的贸易影响包括:中国经济的发展状况,非洲经济发展状况、人民币在世界货币的储蓄比重、中国资本对于非洲的投资。退税政策对于贸易规模的影响包括:中国通过提高对于高污染高能耗企业的税收降低,对于高科技企业的税收,通过这样一降一升的方式,虽然税收整体保持不变,但是推动了中国国内企业发展高科技,将中国企业有低端制造向高端制造进行转型升级,将高污染、高能耗的生产制造向其他国家进行转移,一定程度上提高了国内的生产总值,让贸易出口竞争力得到了提高。出口退税政策对于中国和非洲贸易产业结构的影响:对于出口税收的改良,提高了高污染、高能耗产品和原材料等商品的出口税收,降低了高附加值、高科技商品的出口税收。对于非洲不同区域的影响:中国实施退税政策,促进了中国资本对于非洲进行投资,发展相关的产业链,根据非洲的地理优势和资源禀赋发展不同的行业,例如:中国石油就和非洲当地石油企业共同建立了石油公司,共同完善了一系列石油开发、加工和销售的产业链,不仅推动了非洲当地的经济发展,也让中国的石油供应更加稳定。再次,中国和非洲之间的贸易现状以及中国退税制度的实施之间的联系,本文通过建立数据模型进行的实证分析,分析了中国退税政策制度,对于中国和非洲两地贸易的规模,两地贸易产品结构和两地的贸易区域结构的影响。实证分析结论显示:第1,中国退税制度的实施对于中国和非洲两地贸易的规模具有显著的影响;第2,中国退税制度的实施对于中国和非洲两地贸易的结构具有显著的影响;第3,中国退税制度的实施对于中国和非洲两地贸易的区域具有显著的影响;同时对于两地贸易结构的影响,让中国在贸易出口中高科技商品在贸易的比重越来越高,同时非洲的矿产和石油等资源向中国出口比重提高。中国退税制度的实施对于非洲5个不同的区域在贸易规模和贸易结构上均产生了显著影响。最后,研究结论与展望。归纳本文的研究成果及结论,提出实施建议,提出进一步研究方向,展望未来。本文从关于国际贸易发展的多项研究中选出新的题目,中国出口退税政策对中非贸易影响研究这是一个全新的研究项目,本文较为系统地搜集与分析了中国出口退税政策对中非贸易影响,还指出了中非贸易中的不足之处以及原因,此外,本文还研究了相关贸易理论,对于其他区域具有一定的参考作用。

关键词：中国的税制改革中国和非洲两地贸易中非贸易结构中非区域结构中国退税政策

Improved Manta Ray Foraging Optimizer-based SVM for Feature Selection Problems:A Medical Case Study

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Journal of Bionic Engineering 2024年第1期21卷 409-425页

作者： adel Got Djaafar Zouache Abdelouahab Moussaoui Laith Abualigah Ahmed Alsayat Faculty of informatics University of Science and Technology Houari BoumedieneAlgiersAlgeria LRIA Laboratory University of Science and Technology Houari BoumedieneAlgiersAlgeria Computer Science Department University of Mohamed El Bachir El IbrahimiBordj Bou ArreridjAlgeria Computer Science Department University of Ferhat AbbasSetifAlgeria Computer Science Department Prince Hussein Bin Abdullah Faculty for Information TechnologyAl al-Bayt UniversityMafraq 25113Jordan Department of Computer Science College of Computer and Information SciencesJouf UniversityJoufSaudi Arabia Department of Electrical and Computer Engineering Lebanese American University13-5053ByblosLebanon Hourani Center for Applied Scientific Research Al-Ahliyya Amman UniversityAmman 19328Jordan MEU Research Unit Middle East UniversityAmman 11831Jordan Applied science research center Applied science private universityAmman 11931Jordan School of Computer Sciences Universiti Sains Malaysia11800 PenangMalaysia School of Engineering and Technology Sunway University Malaysia27500 Petaling JayaMalaysia

Support Vector Machine(SVM)has become one of the traditional machine learning algorithms the most used in prediction and classification ***,its behavior strongly depends on some parameters,making tuning these parameters a sensitive step to maintain a good *** the other hand,and as any other classifier,the performance of SVM is also affected by the input set of features used to build the learning model,which makes the selection of relevant features an important task not only to preserve a good classification accuracy but also to reduce the dimensionality of *** this paper,the MRFO+SVM algorithm is introduced by investigating the recent manta ray foraging optimizer to fine-tune the SVM parameters and identify the optimal feature subset *** proposed approach is validated and compared with four SVM-based algorithms over eight benchmarking ***,it is applied to a disease Covid-19 *** experimental results show the high ability of the proposed algorithm to find the appropriate SVM’s parameters,and its acceptable performance to deal with feature selection problem.

关键词： Support vector machine Parameters tuning Feature selection Bioinspired algorithms Manta ray foraging optimizer

Influence of climatic conditions,topography and soil attributes on the spatial distribution of site productivity index of the species rich forests of Jalisco,Mexico

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Journal of Forestry Research 2014年第1期25卷 87-95页

作者： adel mohamed Robin M.Reich Raj Khosla C.Aguirre-Bravo Martin Mendoza Briseo Department of Ecology and Rangeland Stewardship Desert Research Center Department of Forest and Rangeland Stewardship Colorado State University Department of Soil and Crop Sciences Colorado State University USDA Forest Service Colegio de Postgraduados

This paper presents an approach based on field data to model the spatial distribution of the site productivity index （SPI） of the diverse forest types in Jalisco, Mexico and the response in SPI to site and cli-matic conditions. A linear regression model was constructed to test the hypothesis that site and climate variables can be used to predict the SPI of the major forest types in Jalisco. SPI varied significantly with topog-raphy （elevation, aspect and slope）, soil attributes （pH, sand and silt）, climate （temperature and precipitation zones） and forest type. The most important variable in the model was forest type, which accounted for 35% of the variability in SPI. Temperature and precipitation accounted for 8 to 9% of the variability in SPI while the soil attributes accounted for less than 4% of the variability observed in SPI. No significant differences were detected between the observed and predicted SPI for the individual forest types. The linear regression model was used to develop maps of the spatial variability in predicted SPI for the individual forest types in the state. The spatial site productivity models developed in this study provides a basis for understanding the complex relationship that exists between forest productivity and site and climatic conditions in the state. Findings of this study will assist resource managers in making cost-effective decisions about the management of individual forest types in the state of Jalisco, Mexico.

关键词： Best management practices climate change spatial predic-tions tropical dry forests weighted least squares