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Optimal duration for dual antiplatelet therapy with COMBO dual therapy stent

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Journal of Geriatric Cardiology 2019年第11期16卷 840-843页

作者： Aydin Huseynov Michael Behnes Uzair Ansari Stefan Baumann Dirk Lossnitzer ibrahim el-battrawy Christian Fastner Martin Borggrefe ibrahim Akin First Department of Medicine University Medical Centre Mannheim (UMM) University of Heidelberg

The COMBO stent(OrbusNeich Medical BV,the Netherlands)is a stainless-steel platform with the biodegradable abluminal coating containing antiproliferative sirolimus(5 mg/mm)and the luminal stent surface covered with anti-CD-34 *** CD-34 antibodies essentially capture endothelial progenitor cells resulting in rapid re-endothelialization of the treated segment.

关键词： Adverse events Antiplatelet therapy Combo stent

Clinical and echocardiographic analysis of patients suffering from recurrent takotsubo cardiomyopathy

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Journal of Geriatric Cardiology 2016年第11期13卷 888-893页

作者： ibrahim el-battrawy Uzair Ansari Michael Behnes Dennis Hillenbrand Katja Schramm Darius Haghi Ursula Hoffmann Theano Papavassiliu elif elmas Christian Fasmer Tobias Becher Stefan Baumann Christina Dosch Felix Heggemann Jurgen Kuschyk Martin Borggrefe ibrahim Akin First Department of Medicine Faculty of Medicine University Medical Centre Mannheim (UMM) University of Heidelberg Mannheim Germany DZHK (German Center for Cardiovascular Research) Partner Site Heidelberg-Mannheim Mannheim Germany

Background Recurrence of takotsubo cardiomyopathy （TTC） is a well-known complication. However, current literature lists only a few isolated cases. We aimed to determine the incidence and clinical significance of recurrent TTC. Methods ＆ Results Our institutional database constituted a collective of 114 patients diagnosed with TTC since 2003. Close follow-up of these patients revealed a recurrence of TTC in seven of these （6.1%）. The time interval between the index event and its recurrence varied between six months and six years. Arterial hypertension was more revealed in the recurrence group of TTC compared to non-recurrence group, （P = 0.02）. Chronic obstructive pulmo- nary disease and/or asthma was more diagnosed in the recurrence group, （P = 0.04）. Clinical events like fight ventficular involvement, TTC related complications such as life-threatening arrhythmias, pulmonary congestion and in hospital death were observed more frequently in the recurrent episode. Over a mean follow-up of one year the mortality rate was similar in both groups. Conclusions Recurrence of TTC within six years after index event is not an uncommon phenomenon. In the event of right ventricular involvement in the relapse phase, it might be associated with a higher complication rate. TTC recurrence should be the first differential diagnosis in patients with a past history of TTC.

关键词： Biventricular takotsubo cardiomyopathy Recurrent takotsubo cardiomyopathy Takotsubo cardiomyopathy related complication

Laterites-bearing REEs,Wadi Natash,Southeastern Desert,Egypt

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Journal of Rare Earths 2010年第3期28卷 471-476页

作者： Mohamed el-Ahmady ibrahim Nuclear Materials Authority P.O.Box530EL MaadiCairoEgypt

The present paper recorded the occurrence of laterites-bearing REEs in Natash *** laterite deposits occur as horizons(5-15 m in thickness) at the boundary between the Cretaceous sandstones,and Natash *** was recorded in more than twenty six occurrence distributed over an area of about 500 km2 along and around Wadi *** ranges in color from light-grey,dark-grey to *** distribution of laterite deposits is structural *** results of laterites proved the...

关键词： Natash flows laterites clay minerals REEs

Wear properties of copper and copper composites powders consolidated by high-pressure torsion

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Friction 2020年第2期8卷 433-450页

作者： Mohamed ibrahim Abd el AAL Mechanical Engineering Department College of EngineeringPrince Sattam Bin Abdulaziz UniversityWadi Addawaser 11991Saudi Arabia Mechanical Design&Production Department Faculty of EngineeringZagazig UniversityZagazig 44519Egypt

The wear characteristics of Cu and Cu-SiC composite microsize powders consolidated by cold compaction combined with sintering or high-pressure torsion(HPT)were *** HPT processed(HPTed)samples with bimodal and trimodal microstructures and fine Cu grains and SiC particle sizes have superior hardness,reasonable ductility level,and high wear *** wear mass loss and coefficient of friction of HPTed samples were remarkably lower than that of cold-compacted and sintered samples as well as that of micro and nano Cu and Cu-SiC composites from previous *** sample fabrication method has an apparent influence on the wear *** wear mechanism was converted from adhesive,delamination,three-body mechanism,grooves(take off the SiC particles),and cracks into abrasive wear after *** can be considered a dominant wear mechanism in all *** worn surface morphology and analysis support the relationship between wear mechanism and characteristics.

关键词： Cu-SiC composite powders high-pressure torsion(HPT) fine and coarse grains wear characteristics worn surface morphology

Two-Fold and Symmetric Repeatability Rates for Comparing Keypoint Detectors

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Computers, Materials & Continua 2022年第12期73卷 6495-6511页

作者： ibrahim el rube’ Department of Computer Engineering CCITTaif UniversityTaif21944Saudi Arabia

The repeatability rate is an important measure for evaluating and comparing the performance of keypoint *** repeatability rate measurementswere used in the literature to assess the effectiveness of keypoint *** these repeatability rates are calculated for pairs of images,the general assumption is that the reference image is often known and unchanging compared to other images in the same ***,these rates are asymmetrical as they require calculations in only one *** addition,the image domain in which these computations take place substantially affects their *** presented scatter diagram plots illustrate how these directional repeatability rates vary in relation to the size of the neighboring region in each pair of ***,both directional repeatability rates for the same image pair must be included when comparing different keypoint *** paper,firstly,examines several commonly utilized repeatability rate measures for keypoint detector *** researcher then suggests computing a two-fold repeatability rate to assess keypoint detector performance on similar scene ***,the symmetric mean repeatability rate metric is computed using the given two-fold repeatability ***,these measurements are validated using well-known keypoint detectors on different image groups with various geometric and photometric attributes.

关键词： Repeatability rate keypoint detector symmetric measure geometric transformation scatter diagram

A novel synthesis of coumarin derivatives

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Chinese Journal of Chemistry 1998年第6期16卷 528-532页

作者： el-DEEN ibrahim Mohey Faculty of Education Suez Canal University Port Said EgyptFaculty of Education Suez Canal University Port Said Egypt

The chemical. behaviors of 3-ethynylcoumarin towards benzyl bromide, diazonium chloride, hydrogen chloride, ethyl magnesium bromide and its self-coupling are reported.

关键词： Synthesis Reaction coumarin

Chemical behaviours of 3-[1'-chloro-3'-(2"-phenyl-1",3"-oxazol-5"-one-4"-ylidene)propen-l'-yl]coumarin towards some nucleophilic reagents

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Chinese Journal of Chemistry 1998年第6期16卷 533-537页

作者： el-DEEN ibrahim Mohey Faculty of Education Suez Canal University Port-Said EgyptFaculty of Education Suez Canal University Port-Said Egypt

The chemical behaviours of 3-[1'-chloro-3'-(2'-phenyl-1',3'-oxazol-5'-one-4'-ylidene)-propen-1'-yl]coumarin towards nucleophilic reagents (such as hydrolysis,aminolysis,hydroxyl-aminolysis,methanolysis and hydrazinoly... 详细信息

关键词： Chemical behaviours coumarin derivatives nucleophiles

Keypoint Description Using Statistical Descriptor with Similarity-Invariant Regions

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Computer Systems Science & Engineering 2022年第7期42卷 407-421页

作者： ibrahim el rube Sameer Alsharif Department of Computer Engineering College of Computers and Information TechnologyTaif UniversityP.o.Box 11099Taif21944Saudi Arabia

This article presents a method for the description of key points using simple statistics for regions controlled by neighboring key points to remedy the gap in existing ***,the existent descriptors such as speeded up robust features(SURF),Kaze,binary robust invariant scalable keypoints(BRISK),features from accelerated segment test(FAST),and oriented FAST and rotated BRIEF(ORB)can competently detect,describe,and match images in the presence of some artifacts such as blur,compression,and ***,the performance and reliability of these descriptors decrease for some imaging variations such as point of view,zoom(scale),and *** intro-duced description method improves image matching in the event of such *** utilizes a contourlet-based detector to detect the strongest key points within a speciﬁed window *** selected key points and their neighbors con-trol the size and orientation of the surrounding regions,which are mapped on rec-tangular shapes using polar *** resulting rectangular matrices are subjected to two-directional statistical operations that involve calculating the mean and standard ***,the descriptor obtained is invariant(translation,rotation,and scale)because of the two methods;the extraction of the region and the polar transformation techniques used in this *** descrip-tion method introduced in this article is tested against well-established and well-known descriptors,such as SURF,Kaze,BRISK,FAST,and ORB,techniques using the standard OXFORD *** presented methodology demonstrated its ability to improve the match between distorted images compared to other descriptors in the literature.

关键词： Keypoint detection descriptors neighbor region similarity invariance

Cyclic voltammetry,convolutive voltammetry,chrono-potentiometry and digital simulation studies of [Pt(C ≡ C tol)_2(dppm)_2Ir(CO)2]^+PF_6^- complex

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Chinese Science Bulletin 2009年第20期54卷 3801-3807页

作者： el-Hallag S ibrahim Chemistry Department Faculty of ScienceTanta University

The electrochemical behaviour of the heterobimetallic complex [Pt(C≡C tol)2(dppm)2-Ir(CO)2]+PF-6 was studied via cyclic voltammetry,convolutive voltammetry and chronopotentiometry at glassy carbon electrode in dichloromethane *** electrochemical parameters calculated from experimental data were tested and confirmed by matching the experimental cyclic voltammograms with the simulated *** was found that convolutive voltammetry provided higher sensitivity,better resolution and more accurate method for determination of the electrochemical parameters than ordinary cyclic voltammetry.

关键词：循环伏安法卷积伏安法计时电位法二氧化碳 DPPM 模拟数据电化学行为铂