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Chest computed tomography findings of COVID-19 in children younger than 1 year: a systematic review

World Journal of Pediatrics 2021年第3期17卷 234-241页

作者： alireza Ghodsi Moniba Bijari seyed ali Alamdaran Amin Saberi Elnaz Mahmoudabadi Mohammad reza Balali Sara Ghahremani Student Research Committee Faculty of MedicineMashhad University of Medical SciencesMashhadIran Radiology Department Faculty of MedicineMashhad University of Medical SciencesMashhadIran Faculty of Medicine Mashhad University of Medical SciencesAzadi SqMashhadIran Pediatrician Hasheminezhad HospitalMashhadIran Department of Pediatrics Faculty of MedicineMashhad University of Medical SciencesMashhadIran

Background The aim of this systematic review is to evaluate the chest computed tomography(CT)findings in infants with confirmed COVID-19 infection by providing a comprehensive review of the existing *** sources A systematic search was conducted on PubMed and Embase from the onset of the COVID-19 outbreak to October 20,2020,for studies that discussed the chest CT findings in infants younger than 1 year with COVID-19 *** A total of 35 studies comprising 70 COVID-19(58.5% boys)confirmed infants were *** mean age of the included patients was 4.1 months with a range of 1 day to 12 *** CT scans showed bilateral abnormalities in 34 patients,and unilateral lung involvement in 25 ***-glass opacities(GGO)(71.43%)were found to be the most prevalent chest CT manifestation,followed by peribronchial thickening(60%),linear or band-shaped opacities(32.8%),consolidation(28.57%),nodule(18.57%),effusion(7.14%)and focal lucency(7.14%).Conclusions GGO and peribronchial thickening were the most prevalent findings in the infants’chest CT *** or band-shaped opacities,consolidation,and pulmonary nodules are more common in infants than in *** findings suggest that the disease is more likely to be presented as an atypical pneumonia(peribronchial thickening and linear or bandshaped opacities)in this age *** chest CT scan manifestations can be classified as typical COVID-19 infection(peripheral GGO),lobar pneumonia(consolidation)and opportunistic infections(pulmonary nodules).

关键词： Computerized tomography COVID-19 Infant SARS-CoV-2 Systematic review

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Geometrically Nonlinear Analysis of Structures Using Various Higher Order Solution Methods: A Comparative Analysis for Large Deformation

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Computer Modeling in Engineering & Sciences 2019年第12期121卷 877-907页

作者： ali Maghami Farzad Shahabian seyed Mahmoud Hosseini Civil Engineering Department Faculty of EngineeringFerdowsi University of MashhadMashhadIran Industrial Engineering Department Faculty of EngineeringFerdowsi University of MashhadMashhadIran

The suitability of six higher order root solvers is examined for solving the nonlinear equilibrium equations in large deformation analysis of *** applied methods have a better convergence rate than the quadratic Newton-Raphson *** six methods do not require higher order derivatives to achieve a higher convergence *** algorithms are developed to use the higher order methods in place of the Newton-Raphson method to solve the nonlinear equilibrium equations in geometrically nonlinear analysis of *** higher order methods are applied to both continuum and discrete problems(spherical shell and dome truss).The computational cost and the sensitivity of the higher order solution methods and the Newton-Raphson method with respect to the load increment size are comparatively *** numerical results reveal that the higher order methods require a lower number of iterations that the Newton-Raphson method to *** is also shown that these methods are less sensitive to the variation of the load increment *** it is indicated in numerical results,the average residual reduces in a lower number of iterations by the application of the higher order methods in the nonlinear analysis of structures.

关键词： Geometrically nonlinear analysis higher order methods predictor-corrector algorithms convergence rate sensitivity to the increment size

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Incorporating microgrids coupling with utilization of flexible switching to enhance self-healing ability of electric distribution systems

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Protection and Control of Modern Power Systems 2021年第1期6卷 300-310页

作者： Saeed Mousavizadeh Arman Alahyari seyed reza Movahhed Ghodsinya Mahmoud-reza Haghifam Faculty of Electrical and Computer Engineering Tarbiat Modares UniversityPO Box 14115-111TehranIran Skolkovo Institute of Science and Technology(Skoltech) MoscowRussia Department of Electrical Engineering University of Torbat HeydariehTorbat HeydariehIran

Electric distribution networks have to deal with issues caused by natural disasters. These problems possess unique characteristics, and their severity can make load restoration methods impotent. One solution that can help in alleviating the aftermath is the use of microgrids (MGs). Employing the cumulative capacity of the generation resources through MG coupling facilitates the self-healing capability and leads to better-coordinated energy management during the restoration period, while the switching capability of the system should also be considered. In this paper, to form and schedule dynamic MGs in distribution systems, a novel model based on mixed-integer linear programming (MILP) is proposed. This approach employs graph-related theories to formulate the optimal formation of the networked MGs and management of their proper participation in the load recovery process. In addition, the Benders decomposition technique is applied to alleviate computability issues of the optimization problem. The validity and applicability of the proposed model are evaluated by several simulation studies.

关键词： Load restoration Distribution network Microgrids coupling Benders decomposition

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Novel cobalt(Ⅱ) complexes of amino acids-Schiff bases catalyzed aerobic oxidation of various alcohols to ketones and aldehyde

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Chinese Chemical Letters 2010年第11期21卷 1303-1306页

作者： seyed Mohammad seyedi reza Sandaroos Gholam Hossein Zohuri Department of Chemistry Faculty of ScienceFerdowsi University of Mashhad

Two cobalt（Ⅱ） complexes 1 and 2 of Schiff bases derived from amino acids were synthesized and used for oxidation of benzyl alcohol with molecular oxygen at different conditions of pH,solvent,temperature and complex/alcohol molar ratio to optimize reaction conditions and to evaluate the catalytic efficiency of new cobalt Schiff base *** obtained optimum conditions,various alcohols were oxidized to corresponding aldehydes and ketones.

关键词： Cobalt(Ⅱ) complexes Alcohol oxidation Aerobic oxidation

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Surface Modification of Titanium by Producing Ti/TiN Surface Composite Layers via FSP

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Acta Metallurgica Sinica(English Letters) 2017年第6期30卷 550-557页

作者： ali Shamsipur seyed-Farshid Kashani-Bozorg Abbas Zarei-Hanzaki Department of Mining and Metallurgical Engineering Amirkabir University of Technology School of Metallurgy and Materials Engineering University College of Engineering University of Tehran

In this paper, we report the use of blowing nitrogen gas for the successful fabrication of a composite layer composed of Ti/TiN on a substrate of commercially pure titanium （cp-2） using the friction stir processing technique. The prepared composite layer was characterized by X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray spectrometry. The maximum microhardness of the Ti/TiN composite reached 1024 HV, which is 6.4 times higher than that of the titanium substrate. The results of wear test indicated that the Ti/TiN composite layer possesses excellent abrasive and adhesive wear resistance because of the formation of the TiN and its high hardness.

关键词： Friction stir processing Surface composite Titanium TiN Hardness Wear resistance X- ray diffraction

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Impacts of Depositional Facies and Diagenesis on Reservoir Quality:A Case Study from the Rudist-bearing Sarvak Formation,Abadan Plain,SW Iran

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Acta Geologica Sinica(English Edition) 2023年第1期97卷 190-206页

作者： ali ASSADI Javad HONARMAND seyed ali MOALLEMI Iraj ABDOLLAHIE-FARD Geology Division Tehran Energy Consultants(TEC)TehranIran School of Earth Sciences Damghan UniversityDamghanIran Department of Petroleum Geology Research Institute of Petroleum Industry(RIPI)TehranIran National Iranian Oil Company Exploration Directorate(NIOC)TehranIran

An integrated geological-petrophysical analysis of the rudist-bearing sequence of the Cretaceous Sarvak Formation is given one giant oilfield,and provides an improved understanding of this main reservoir in the Abadan Plain,in the Zagros Basin,SW *** main objective of this study is to evaluate reservoir potential of the Sarvak Formation,and then to utilize the calibrated well log signature to correlate reservoir potential in un-cored *** main facies are recognized and categorized in five facies groups:lagoon,shoal,rudist-biostrome,slope,and shallow open marine,deposited on a shelf carbonate *** the distribution of diagenetic products and their effects on pore systems,three diagenetic facies namely,(DF-1)low dissolution and cementation;(DF-2);high dissolution;and(DF-3)high cementation are *** initial sedimentary characteristics in combination with distribution of diagenetic products play an important role in reservoir quality *** effect of diagenetic processes related to disconformities mainly depends on the facies nature below these ***-dominated facies of shoal and rudist debris,observed below the Cenomanian–Turonian disconformity,are mostly characterized by high dissolution and interconnected pore ***,depositional and diagenetic facies in the studied wells are correlated by petrophysical well log data,leading to distribution of the reservoir *** obtained can be utilized for efficient reservoir characterization of the Sarvak Formation and its equivalent units in the Arabian Plate.

关键词： upstream petroleum facies diagenesis disconformity reservoir quality rudists Sarvak Formation Zagros Basin

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Efficacy of premedication with activated Dimethicone or N-acetylcysteine in improving visibility during upper endoscopy

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World Journal of Gastroenterology 2011年第37期17卷 4213-4217页

作者： seyed Mohammad Kazem Hosseini Asl Gholam reza Sivandzadeh Department of Internal Medicine Nemazee HospitalShiraz University of Medical Sciences

AIM:To assess the efficacy of N-acetylcysteine(NAC) and activated Dimethicone in improving endoscopic mucosal ***:A total of 148 patients were randomly allocated into four groups to receive one of the following premedications:group A:100 mL water alone;group B:activated Dimethicone plus water(up to 100 mL);group C:NAC plus water(up to 100 mL);and group D:activated Dimethicone and NAC plus water(up to 100 mL).A single endoscopist blinded to the patients group assessed the gastric mucosal visibility scores(range 1-4) at four *** sum of the scores from the four sites was considered as the total mucosal visibility score(TMVS).RESULTS:The patients in group B showed a significantly lower TMVS than those of groups A and C(P 0.05).The difference between TMVS of groups C and A was not significant(P > 0.05).CONCLUSION:Premedication with activated Dimethicone 20 min prior to the upper endoscopy leads to the best *** does not improve visualization by itself.

关键词： Dimethicone N-acetylcysteine Simethicone Upper endoscopy

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Herbaceous species diversity in relation to fire severity in Zagros oak forests,Iran

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Journal of Forestry Research 2014年第1期25卷 113-120页

作者： Morteza Pourreza seyed Mohsen Hosseini ali Akbar Safari Sinegani Mohammad Matinizadeh seyed Jalil Alavai Department of forestry Tarbiat Modares University Soil department Bu-Ali Sina University Research Institute of forest and range lands

Zagros forests are mainly covered byQuercus brantii L. coppices and oak sprout clumps occupy the forest area like patches. We investigated post-fire herbaceous diversity in the first growing season after fire. For this purpose neighboring burned and unburned areas were selected with the same plant species and ecological conditions. The data were collected from areas subjected to different fire severities. Overall 6 treatments were considered with respect to fire severity and the mi-crosites of inside and outside of oak sprout clumps including： unburned inside and outside of sprout clumps （Ni and No）, inside of sprout clumps that burned with high fire severity （H）, inside of sprout clumps that burned with moderate fire severity （M）, outside of sprout clumps that burned with low fire severity （OH and OM）. Different herbaceous com-position was observed in the unburned inside and outside of oak sprout clumps. The species diversity and richness were increased in treatments burned with low and moderate fire severity. However, in treatment burned with high fire severity （H）, herbaceous cover was reduced, even-ness was increased, and richness and diversity were not significantly changed. We concluded that besides the microsites conditions in forest, fire severity is an inseparable part of the ecological effect of fire on her-baceous composition.

关键词： biodiversity fire severity Oak sprout clump Zagros forests,microsite

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Biodegradable starch/poly(vinyl alcohol) film reinforced with titanium dioxide nanoparticles

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International Journal of Minerals,Metallurgy and Materials 2013年第10期20卷 1001-1011页

作者： Zahra Hejri ali Akbar Seifkordi ali Ahmadpour seyed Mojtaba Zebarjad Abdolmajid Maskooki Department of Chemical Engineering Science and Research BranchIslamic Azad University Department of Chemical Engineering Ferdowsi University of Mashhad Department of Materials Science and Engineering Engineering FacultyShiraz University Research Institute of Food Science and Technology

Biodegradable starch/poly （vinyl alcohol）/nano-titanium dioxide （ST/PVA/nano-Ti02） nanocomposite films were prepared via a solution casting method. Their biodegradability, mechanical properties, and thermal properties were also studied in this paper. A general full factorial experimental approach was used to determine effective parameters on the mechanical properties of the prepared films. ST/PVA/TiO2 nanocomposites were characterized by scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The results of mechanical analysis show that ST/PVA films with higher contents of PVA have much better mechanical properties. In thermal analysis, it is found that the addition of Ti02 nanoparticles improves the thermal stability of the films. SEM micrographs, taken from the fracture surface of samples, illustrate that the addition of PVA makes the film softer and more flexible. The results of soil burial biodegradation indicate that the biodegradability of ST/PVA/TiO2 films strongly depends on the starch proportion in the film matrix. The degradation rate is increased by the addition of starch in the films.

关键词： nanocomposite films titanium dioxide nanopaxticles biodegradability mechanical properties thermogravi-metric analysis

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Epidemiological aspects of ocular superglue injuries

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International Journal of Ophthalmology(English edition) 2016年第2期9卷 278-281页

作者： seyed ali Tabatabaei Shokoufeh Modanloo Arezoo Mohammadkhani Ghiyasvand Abolghasem Pouryani Mohammad Soleimani seyed Mehdi Tabatabaei Ahmad reza Pakrah Hamideh Masarat Eye Research Center Farabi Eye Hospital Tehran University of Medical Sciences

AIM： To report the frequency, associated risk factors and characteristics of cases referred to Farabi Eye Hospital with ocular superglue injuries. METHODS： In a descriptive cross-sectional study conducted between December 2012 and February 2013, patients with ocular superglue injuries were evaluated. Age, sex, educational level, location, time, mechanism, type, site and time of eye injury were gathered through interview using a customized questionnaire. All participants had given consent to undergo thorough eye examination. RESULTS： Over the course of three months, 105 patients with ocular superglue injuries enrolled in the study, including 56 （53.3%） men and 49 （46.7%） women with the mean age of 24.7±11.6 （range, 2 to 53）y. The right eye, left eye and both eyes were involved in 52%, 42% and 6% of the patients, respectively. Most of injuries had occurred at home （72.4%） and at night （55%）. More than half of patients （52.4%） did not take any primary aids following the ocular injury. Patient carelessness （78.1%）, childhood curiosity and lack of parental supervision （11.4%）, storing superglue in inappropriate places and inadvertently using superglue as eye drops due to poor vision （2.9%）, inadequate awareness of superglue applications [used to stick on artificial nails （3.8%）, artificial eyelashes （1.9%） and broken tooth （1%）] and being assaulted with glue （1%） were common risk factors. CONCLUSION： The frequency of ocular superglue injuries in patients referred to Farabi Eye Hospital is relatively high. This finding underlines the importance of public education and awareness about superglue injuries to the eye and taking protective measures and safety strategies in order to prevent these injures.

关键词： eye injuries superglue risk factors

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