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Assessment of fracture process in forta and polypropylene fiber-reinforced concrete using experimental analysis and digital image correlation

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Frontiers of Structural and Civil Engineering 2022年第12期16卷 1633-1652页

作者： seyed Hamid KALALI Hamid ESKANDARI-NADDAF seyed Ali EMAMIAN Department of Civil Engineering Hakim Sabzevari UniversitySabzevar ***Iran

This paper aims to characterize the evolution of the fracture process and the cracking behavior in fortaferro(FF)and polypropylene(PP)fiber-reinforced concrete under the uniaxial compressive loading using experimental analysis and digital image correlation(DIC)on the surface *** this purpose,6 mix designs,including two FF volume fractions of 0.10%,and 0.20%and three PP volume fractions of 0.20%,0.30%,and 0.40%,in addition to a control mix were evaluated according to compressive strength,modulus of elasticity,toughness index,and stress–strain *** influence of fibers on the microstructural texture of specimens was analyzed by scanning electron microscope(SEM)*** show that FF fiber-reinforced concrete specimens demonstrated increased ductility and strength compared to PP *** results revealed that the major crack and fracture appeared at the peak load of the control specimen due to brittleness and sudden gain of large lateral strain,while a gradual increase in micro-crack quantity at 75%of peak load was observed in the fiber specimens,which thenbegan to connect with each other up to the final *** accuracy of the results supports DIC as a reliable alternative for the characterization of the fracture process in fiber-reinforced concrete.

关键词： fiber-reinforced concrete forta-ferro and polypropylene fiber fracture process cracking behavior digital image correlation

Excellent photocatalytic performance under visible-light irradiation of ZnS/rGO nanocomposites synthesized by a green method

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Frontiers of Materials Science 2016年第4期10卷 385-393页

作者： Hassan Rayat AZIMI Mahmood GHORANNEVISS seyed mohammad ELAHI mohammad reza MAHMOUDIAN Farid JAMALI-SHEINI Ramin YOUSEFI Plasma Physics Research Center Science and Research Branch Islamic Azad University Tehran Iran Department of Chemistry Shahid Sherafat University of Farhangian 15916 Tehran Iran Advanced Surface Engineering and Nano Materials Research Center Department of Physics Ahvaz Branch Islamic Azad University Ahvaz Iran Department of Physics Masjed-Soleiman Branch isiamic Azad University Masjed-Soleiman Iran

ZnS/graphene nanocomposites with different graphene concentrations （5, 10 and 15 wt.%） were synthesized using L-cysteine as surfactant and graphene oxide （GO） powders as graphene source. Excellent performance for nanocomposites to remove methylene blue （MB） dye and hexavalent chromium （Cr（VI）） under visible-light illumina- tion was revealed. TEM images showed that ZnS NPs were decorated on GO sheets and the GO caused a significant decrease in the ZnS diameter size. XRD patterns, XPS and FTIR spectroscopy results indicated that GO sheets changed into reduced graphene oxide （rGO） during the synthesis process. Photocurrent measurements under a visible- light source indicated a good chemical reaction between ZnS NPs and rGO sheets.

关键词： ZnS/rGO nanocomposites graphene photocatalytic performance watertreatment green nanotechnology

Osteoarticular manifestations of human brucellosis:A review

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World Journal of Orthopedics 2019年第2期10卷 54-62页

作者： seyed Mokhtar Esmaeilnejad-Ganji seyed mohammad reza Esmaeilnejad-Ganji Clinical Research Development Center Shahid Beheshti Hospital Babol University of Medical Sciences Department of Orthopedics Babol University of Medical Sciences Infectious Diseases and Tropical Medicine Research Center Health Research Institute Babol University of Medical Sciences Boston University School of Medicine

Brucellosis is a common global zoonotic disease, which is responsible for a range of clinical manifestations. Fever, sweating and musculoskeletal pains are observed in most patients. The most frequent complication of brucellosis is osteoarticular involvement, with 10% to 85% of patients affected. The sacroiliac(up to 80%) and spinal joints(up to 54%) are the most common affected *** and spondylodiscitis are the most frequent complications of brucellar spinal involvement. Peripheral arthritis, osteomyelitis, discitis, bursitis and tenosynovitis are other osteoarticular manifestations, but with a lower prevalence. Spinal brucellosis has two forms: focal and diffuse. Epidural abscess is a rare complication of spinal brucellosis but can lead to permanent neurological deficits or even death if not treated promptly. Spondylodiscitis is the most severe form of osteoarticular involvement by brucellosis, and can have single-or multifocal involvement. Early and appropriate diagnosis and treatment of the disease is important in order to have a successful management of the patients with osteoarticular brucellosis. Brucellosis should be considered as a differential diagnosis for sciatic and back pain, especially in endemic regions. Patients with septic arthritis living in endemic areas also need to be evaluated in terms of brucellosis. Physical examination, laboratory tests and imaging techniques are needed to diagnose the disease. Radiography, computed tomography, magnetic resonance imaging(MRI) and bone scintigraphy are imaging techniques for the diagnosis of osteoarticular brucellosis. MRI is helpful to differentiate between pyogenic spondylitis and brucellar spondylitis. Drug medications(antibiotics)and surgery are the only two options for the treatment and cure of osteoarticular brucellosis.

关键词： Brucellosis Brucella Osteoarticular manifestations Musculoskeletal pain Bone Joint

Modified unilateral periureteral injection technique in the treatment of patients with high-grade vesicoureteral reflux: A study of primary findings

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Asian Journal of Urology 2023年第1期10卷 96-100页

作者： seyed Alaeddin Asgari Afshin Safaei-Asl Mandana Mansour-Ghanaie seyed mohammad Asgari Asghar Faryabi mohammadreza Bazli Faezeh Emami Sigaroudi seyed Ahmad Naseri Alavi Urology Research Center Razi HospitalSchool of MedicineGuilan University of Medical SciencesRashtIran School of Medicine Guilan University of Medical SciencesRashtIran Faculty of Medicine Tabriz University of Medical SciencesTabrizIran

Objective:Although endoscopic treatment has been used by many pediatric urologists for the treatment of vesicoureteral reflux(VUR),it has no considerable success in high-grade *** aimed to describe the primary outcomes of unilateral periureteral injection technique(PIT),as well as bilateral PIT in high-grade ***:In this prospective study,we examined 92 ureters in 45 boys and 40 girls from February 2010 to May *** PIT and unilateral PIT were applied in 67 and 25 refluxing units,*** the unilateral PIT,the subureteral injection site was only at the 5-or 7-o’clock ***,in the bilateral PIT,the subureteral injection sites were at 5-and 7-o’clock ***-and post-operative reflux grades were evaluated by voiding cystourethrography 6 months after ***:Seven patients had bilateral ***,75(81.5%)ureters showed Grade IV VUR,while 17(18.5%)had primary Grade V *** mean age of the subjects was 39.2 *** unilateral PIT ureters,VUR was resolved in 23(92.0%)refluxing *** was downgraded to Grade III in one ureter(4.0%)and to Grade II in another ureter(4.0%).In addition,in bilateral PIT cases,VUR was resolved in 60(89.6%)ureters;it downgraded to Grades II and III in 3(4.5%)and 4(6.0%)refluxing units,***:Unilateral PIT can be highly effective in the treatment of selected ureters of high-grade ***,further studies are needed to confirm our results.

关键词： Periureteral injection technique Bilateral periureteral injection technique Unilateral periureteral injection technique Endoscopy Vesicoureteral reflux

Damage identification in connections of moment frames using time domain responses and an optimization method

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Frontiers of Structural and Civil Engineering 2021年第4期15卷 851-866页

作者： Narges PAHNABI seyed mohammad seyedPOOR Department of Civil Engineering Shomal UniversityAmol***Iran

Damage is defined as changes to the material and/or geometric properties of a structural system,comprising changes to the boundary conditions and system connectivity,adversely affecting the system’s *** the elements of structures,particularly critical components,is vital to evaluate the structural lifespan and *** this study,an optimization-based method for joint damage identification of moment frames using the time-domain responses is *** beam-to-column connection in a metallic moment frame structure is modeled by a zero-length rotational spring at both ends of the beam *** each connection,an end-fixity factor is specified,which changes between 0 and ***,the problem of joint damage identification is converted to a standard optimization *** objective function is defined using the nodal point accelerations extracted from the damaged structure and an analytical model of the structure in which the nodal accelerations are obtained using the Newmark *** optimization problem is solved by an improved differential evolution algorithm(IDEA)for identifying the location and severity of the *** assess the capability of the proposed method,two numerical examples via different damage scenarios are ***,a comparison between the proposed method and the existing damage identification method is *** outcomes reveal the high efficiency of the proposed method for finding the severity and location of joint damage considering noise effects.

关键词： damage identification beam-to-column connection time-domain response optimization

Comparison of the diagnostic accuracy of CT scan with oral and intravenous contrast versus CT scan with intravenous contrast alone in the diagnosis of blunt abdominal trauma

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Chinese Journal of Traumatology 2023年第3期26卷 174-177页

作者： Iraj Golikhatir mohammad Sazgar Fatemeh Jahanian seyed Jalal Mousavi Amiri Hamed Aminiahidashti Department of Emergency Medicine Mazandaran University of Medical SciencesSariIran

Purpose:Abdominal CT scan using oral and intravenous(IV)contrast is helpful in the diagnosis of intra-abdominal ***,the use of oral and IV contrast delays the process of diagnosis and increases the risk of *** has also been shown that CT scan with IV contrast alone is as helpful as CT scan with oral and IV contrast and rectal CT scan in detecting abdominal ***,the present study aims to prospectively compare the diagnostic value of CT scan with oral and IV contrast versus CT scan with IV contrast alone in the diagnosis of blunt abdominal trauma(BAT).Methods:Altogether 123 BAT patients,60(48.8%)women and 63(51.2%)men with the mean age of(40.4±18.7)years who referred to the emergency department of Imam Khomeini Educational and Medical Center in Sari,Iran(a tertiary trauma center in north of Iran)from November 2014 to March 2017 and underwent abdominal CT scans+laparotomy were *** with penetrating trauma or hemodynamically unstable patients were *** participants were randomly allocated to two groups:abdominal CT scan with oral and IV contrast(n=63)and CT scan with IV contrast alone(n=60).No statistically significant difference was found between two groups regarding the hemodynamic parameters,age,gender,injury mechanisms(all p>0.05).The results of CT scan were compared with that of laparotomy *** collected data were recorded in SPSS version 22.0 for *** data were presented as mean and ***:The sensitivity and specificity of CT scan using oral and IV contrast in the diagnosis of BAT were estimated at 96.48(95%CI:90.73-99.92)and 92.67(95% CI:89.65-94.88),respectively;while CT scan with IV contrast alone achieved a comparable sensitivity and specificity of 96.6(95% CI:87.45-99),42 and 92.84(95% CI:89.88-95.00),***:CT scan with IV contrast alone can be used to assess visceral injuries in BAT patients with normal hemodynamics to avoid diagnostic delay.

关键词： Blunt abdominal trauma Contrast CT scan Laparotomy

Integrative multi-platform meta-analysis of hepatocellular carcinoma gene expression profiles for identifying prognostic and diagnostic biomarkers

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Genes & Diseases 2023年第4期10卷 1194-1196页

作者： Maryam Gholizadeh Morteza Hadizadeh seyed reza Mazlooman Saeid Eslami Sadegh Raoufi Marziye Farsimadan Maryam Rashidifar Marek Drozdzik Mehrnaz Mehrabani Department of Medical Informatics Faculty of MedicineMashhad University of Medical SciencesMashhad 91388-13944Iran Physiology Research Center Institute of NeuropharmacologyKerman University of Medical SciencesKerman ***Iran Department of Computer Engineering Central Tehran BranchIslamic Azad UniversityTehran ***Iran Modeling in Health Research Center Institute for Futures Studies in HealthKerman University of Medical SciencesKerman ***Iran Department of Biology Faculty of SciencesUniversity of GuilanRasht 13111-41937Iran Department of Plant Biotechnology Faculty of Life Science and BiotechnologyShahid Beheshti UniversityTehran 198396-3113Iran Department of Experimental and Clinical Pharmacology Pomeranian Medical UniversitySzczecin 70-111Poland

Hepatocellular carcinoma(HCC),as one of the most com-mon types of primary liver cancer(PLV),accounts for approximately 75%e90%of all PLV cases identified worldwide.^(1)Currently,the most effective treatment for HCC patients constitutes liver ***,due to high rates of recurrence a poor prognosis is predicted.^(2)Therefore,accurate HCC biomarkers are ur-gently needed to develop innovative *** of earlier investigations to identify biomarkers have been severely limited by sample size.

关键词： liver prognosis hepatocellular

A new approach to LST modeling and normalization under clear-sky conditions based on a local optimization strategy

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International Journal of Digital Earth 2022年第1期15卷 1833-1854页

作者： Majid Kiavarz mohammad Karimi Firozjaei seyed Kazem Alavipanah Quazi K.Hassan Yoann Malbéteau Si-Bo Duan Department of Remote Sensing and GIS University of TehranTehranIran Geomatics Engineering Schulich School of EngineeringUniversity of CalgaryCalgaryCanada Center for Remote Sensing Applications Mohammed VI Polytechnic University (UM6P)Ben GuerirMorocco Key Laboratory of Agricultural Remote Sensing Ministry of Agriculture/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijingPeople’s Republic of China

The normalization of LST relative to environmental parameters is of great importance in various environmental applications. The purpose of this study was to develop a new approach for LST normalization relative to environmental variables. These included topographic variables (i.e. solar irradiance and near-surface temperature lapse rate (NSTLR)) as well as biophysical properties (i.e. vegetation,wetness,and albedo). The study was conducted in two phases,namely (1) using global and (2) local optimization strategies to calculate the regression coefficients of environmental variables in the partial least squares regression (PLSR) and build the non-linear linking model in the random forest regression (RFR). The RMSEs between actual LST and modeled LST based on the global and local optimization strategies using PLSR (RFR) were 2.202 (0.935) and 0.939 (0.835) °C,respectively. The results showed that RFR had higher efficiency than PLSR in normalizing LST. Moreover,the local optimization method outperformed the global optimization method in terms of normalization accuracy. The results of this study could be very useful in many environmental applications such as identifying thermal anomalies,and surface anthropogenic heat island modeling.

关键词： Normalization land surface temperature environmental variables partial least squares random forest local strategy

A comparative study of physicochemical and photocatalytic properties of visible light responsive Fe,Gd and P single and tri-doped TiO_2 nanomaterials

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Journal of Rare Earths 2018年第1期36卷 72-85页

作者： seyed mohsen adyani mohammad ghorbani department of materials science and engineering sharif university of technologyPO．Box 11155-9466Tehran lran institute for nanoscience and nanotechnology(inst) sharif university of technologyP0．Box 11155-8639 Tehran 1ran

High performance Fe-Gd-P tri-doped TiO2 nanoparticles （1 at% for each dopant） were successfully synthesized by a modified sol-gel method. Various analytical and spectroscopic techniques were carried out to determine the physicochemical properties of the prepared samples, including XRD, EDX, FESEM, BET, FFIR, XPS, PL, EIS and UV-Vis diffuse reflectance spectroscopy. The photocatalytic activities of prepared samples were evaluated by photo degradation of methyl orange （MO） and 4-chlorophenol （4- CP） as model pollutants under visible light irradiation. Effects of each dopant on different properties of TiO2 nanoparticles were investigated. Results show that Gd and P doping enhances Ti02 surface textural properties by forming Ti O Gd and Ti-O-P bonds. It is found that Gd plays a superior role in increasing oxygen vacancies and organic species on TiO2 surface. Gd doping also facilitates transferring of the photo-induced charge carriers to the surface adsorbed species. The enhanced electronic band structure and visible light response, as well as high electron lifetime of Fe-Gd-P tri-doped sample is mainly attributed to Fe and Gd doping. The tri-doped TiO2 with rate constant ofkapp - 1.28 ~ 10-2 min-1 for MO and kapp ~ 0.94 ~ 10-2 min-1 for 4-CP, shows the highest photodegradation rate among all samples including undoped and single doped samples. The improved photocatalytic performance of Fe-Gd-P tri- doped Ti02 is due to the synergistic effect of enhanced surface chemistry and textural properties, increased number of surface adsorbed hydroxyl groups and organic species, improved visible light ab- sorption, increased lifetime of the photo-induced electron/hole pairs and boosted interfacial charge transfer.

关键词： Fe-Gd-P tri-doped TiO2Sol-gel synthesisPhotodegradationVisible light responseSynergistic effectRare earths