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Structural Health Monitoring for Reinforced Concrete Containment Using Inner Electrical Resistivity Method

Open Journal of Civil Engineering 2021年第3期11卷 317-341页

作者： Mostafa Hassaan mohamed ihab elmasry Nabil El Ashkar Construction and Building Engineering Department Arab Academy for Science Technology and Maritime Transport Alexandria Egypt

Nuclear power plants (NPPs) are considered as the main source for generating electricity nowadays in some countries. The effect of impact of heavy fully loaded aeroplane such as (Boeing 747-200c) causes leakage of the radiation through the cracks generated on the external RC containment of NPPs, and this leads to severe damage for humans and cities. In this research paper, external RC containment is modeled using ANSYS and hit by Boeing 747-200c which is the heavier aeroplane compared to other jets and causes severe damage for external RC containment. In addition, the impact location for Boeing 747-200c is considered at 30 m vertical height. RC containment response was studied after the impact of an aeroplane and a proposed structural health monitoring technique is applied using embedded sensors in order to detect and locate the embedded cracks that is generated due to the effect of impact of heavy aeroplane. It was concluded that RC containment is intact except for the impact region which is damaged. An experimental program was applied on a part of the element in ANSYS which is away from the impact region. Four specimens were cast using heavy weight concrete in laboratory. Three cracked specimens consist of different lengths of vertical cracks which represent different times of impact in order to replicate crack propagation as in ANSYS. The cracks are simulated inside laboratory specimens using failure criteria. The parameters used in detecting the cracks for specimens are the percentage change in electrical resistivity and Decimal Logarithm

关键词： Reinforced Concrete Containment Structural Health Monitoring Electrical Resistivity

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The vitreomacular interface in different types of agerelated macular degeneration

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International Journal of Ophthalmology(English edition) 2017年第2期10卷 246-253页

作者： mohamed Abd ElM onaem El-Hifnawy Hisham Ali Ibrahim Amir Ramadan Gomaa mohamed A elmasry Ophthalmology Department Alexandria University Faculty of MedicineKhartoum SquareAzaritaAlexandria 21526Egypt

AIM： To evaluate the vitreomacular interface in cases with wet age-related macular degeneration（AMD） and to compare them to eyes with dry AMD and normal ***： This was a cross-sectional comparative study that included 87 eyes with wet AMD,42 eyes with dry AMD and 40 eyes without AMD as a control *** coherence tomography（OCT） examination was performed for all patients to assess the vitreomacular ***： In the wet AMD group,34.5% of cases had vitreomacular adhesion（VMA）.Only 14.3% of dry AMD cases and 10% of control cases had *** was a significant difference between the control group and the wet AMD group（P=0.004） as well as the dry and wet AMD group（P=0.017）.There was also a significant difference between the incidence of VMA in patients with subretinal choroidal neovascularization（CNV,type 1） and intraretinal CNV（type 2 or type 3）（P=0.020）.CONCLUSION： There is an association between posterior vitreous attachment and *** is also an increased incidence of VMA with intra-retinal CNV.

关键词： age-related macular degeneration vitreomacular interface optical coherence tomography macula

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The Relationship between Serum Pentraxin-3 Levels and Severity of Coronary Heart Disease

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World Journal of Cardiovascular Diseases 2018年第7期8卷 370-380页

作者： mohamed Yahia Omar S. elmasry Mai Abdel Ra’ouf Department of Cardiology College of Medicine University of Menoufia Shebin-Alkoum Egypt Department of Applied Medical Chemistry Medical Research Institute University of Alexandria Alexandria Egypt Department of Cardiology Ram Medical Complex Dammam KSA

Background: Clinical data suggested that pentraxin-3 is a biomarker for atherosclerosis due to its role in inflammatory processes since it exerts unfavorable effects on the course of atherosclerosis, stimulates plaque formation, and augments vascular inflammation. Objective: The aims of this study were to measure the level of serum pentraxin-3 in patients with suspected coronary artery disease (CAD) and to determine whether it was associated with the severity of CAD. Material and Methods: The serum pentraxin-3 level was measured by enzyme-linked immunosorbent assay in 80 patients who were referred for elective coronary angiography due to positive stress test results. SYNTAX score was used to determine the severity of CAD. Results: The study cohort consisted of 45 (56.25%) males and 35 (43.75%) females with a mean age of 55 ± 9.8 years. The mean serum pentraxin-3 level was 3.79 ± 1.38 ng/ml, and the mean SYNTAX score was 15.8 ± 11.3. A significant correlation was observed between pentraxin-3 level and SYNTAX score (r = 0.459, p - 32 or ≤22 (p = 0.002). Conclusion: The serum level of inflammatory marker pentraxin-3 is increased in patients with CAD and is correlated with the severity of CAD.

关键词： Coronary Artery Disease Pentraxin-3 SYNTAX Score

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存储器式的逻辑计算机的EFL结构

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计算机研究与发展 1976年第3期 40-47+69页

作者： mohamed I.elmasry Philip Thompson 胡祥森

LIM(逻辑存储器)结构使得计算机系统的中央处理部件以规则的陈列与存储器结合在一块。这些陈列单元本身就是很规则的,可以采用统一的双层EFL结构。此种结构是改进了的电流型逻辑,易于大规模集成,用与普通射极耦合逻辑(ECL)门相当的功耗... 详细信息

LIM(逻辑存储器)结构使得计算机系统的中央处理部件以规则的陈列与存储器结合在一块。这些陈列单元本身就是很规则的,可以采用统一的双层EFL结构。此种结构是改进了的电流型逻辑,易于大规模集成,用与普通射极耦合逻辑(ECL)门相当的功耗和硅片面积就能实现三级逻辑。它还允许用单一结构组成△型门闩触发器。在LIM的数据传送和顺序陈列的例子中,这种结构的能力得到了证明。

关键词： EFL 触发器存储器存贮器电子器件逻辑计算机

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