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| 1 | Comparison of neurological clinical manifestation in patients with hemorrhagic and ischemic stroke显示文摘BACKGROUND: Cerebrovascular accident(CVA) is the third leading cause of death and disability in developed countries. Anyone suspected of having a stroke should be taken immediately to a medical facility for diagnosis and treatment. The symptoms that follow a stroke aren't signi? cant and depend on the area of the brain that has been affected and the amount of tissue damaged. Parameters for predicting long-term outcome in such patients have not been clearly delineated, therefore the aim of this study was to investigate this possibility and to test a system that might practicably be used routinely to aid management and predict outcomes of individual stroke patients.METHODS: A descriptive hospital-based study of the neurological symptoms and signs of 503 patients with ischemic stroke, including severe headache, seizure, eye movement disorder, pupil size, Glasgow Coma Scale(GCS), agitation were analyzed in this study.RESULTS: In the current study, dilated pupils, agitation, acute onset headache, lower GCS score, seizure, and eye gaze impairment had signi? cantly higher prevalence in hemorrhagic stroke patients(P<0.001). However, the rate of gradual progressive headache is significantly higher in ischemic stroke patients(P<0.001).CONCLUSION: Although this result provides reliable indicators for discrimination of stroke types, imaging studies are still the gold standard modality for diagnosis. | Seyedhossein Ojaghihaghighi Samad Shams Vahdati Akram Mikaeilpour Ali Ranlouz | 2017 | World Journal of Emergency Medicine2017，8，1： | 17 |
| 2 | Effects of sphere size on the microstructure and mechanical properties of ductile iron–steel hollow sphere syntactic foams显示文摘The effects of sphere size on the microstructural and mechanical properties of ductile iron–steel hollow sphere(DI–SHS) syntactic foams were investigated in this study. The SHSs were manufactured by fluidized-bed coating via the Fe-based commercial powder–binder suspension onto expanded polystyrene spheres(EPSs). Afterwards, the DI–SHS syntactic foams were produced via a sand-mold casting process. The microstructures of specimens were investigated by optical microscopy, scanning electron microscopy(SEM), and energy-dispersive X-ray spectroscopy(EDS). The microscopic evaluations of specimens reveal distinct regions composed of the DI matrix, SHS shells, and compatible interface. As a result, the microstructures and graphite morphologies of the DI matrix depend on sphere size. When the sphere size decreases, the area fractions of cementite and graphite phases are observed to increase and decrease, respectively. Compression tests were subsequently conducted at ambient temperature on the DI–SHS syntactic foams. The results reveal that the compression behavior of the syntactic foams is enhanced with increasing sphere size. Furthermore, the compressed specimens demonstrate that microcracks start and grow from the interface region. | Hamid Sazegaran Ali-Reza Kiani-Rashid Jalil Vahdati Khaki | 2016 | International Journal of Minerals,Metallurgy and Materials2016，23，6： | 5 |
| 3 | Evaluation of preventable trauma death in emergency department of Imam Reza hospital显示文摘BACKGROUND: Trauma is considered as a worldwide problem despite socio-economic development. Motor vehicle accidents(MVAs) are the most important cause of trauma. Trauma related deaths are mostly preventable. This study aimed to investigate the causes and prevention of death in trauma patients.METHODS: This retrospective, descriptive-analytic study assessed 100 trauma patients referred to our emergency department(ED) from January 2013 to Januanry 2015. The included patients were those with trauma died after arrival at our ED. Age, sex, cause of trauma, clinical causes of death, causes of death def ined by autopsy, way of transfer to the ED, time of ambulance arrival at the scene of trauma, and time elapsed to enter the ED from the scene of trauma were studied.RESULTS: In the 100 patients, 21(21%) patients were female and 79(79%) male. Fortythree patients were older than 60 years. Trauma was largely due to pedestrian accidents in 31% of the patients, and 33% had a hypo-volemic shock. About 80% of deaths were due to intra-cranial hemorrhage(ICH) or intra-ventricular hemorrhage(IVH), and spinal injuries were not preventable. Autopsy revealed that 28% of the patients suffered from internal injuries. Autopsy revealed that 19% of the deaths were not preventable and 81% were considered preventable. In our patients, 76 were transferred to the hospital by emergency medicine services(EMS). Analysis of time for ambulance arrival to the scene and frequency of death revealed that 52.2% of the deaths occurred between 11 and 15 minutes. Analysis of time for admission to the ED from the scene of trauma showed that 74.6% deaths occurred between 6 and 10 minutes.CONCLUSIONS: The rate of hospital preventable deaths is about 80%, a high mortality rate, which denotes a lack of proper diagnosis and treatment. The time for arrival of EMS at the scene of trauma is longer than that in other countries. | Changiz Gholipour Bahram Samadi Rad Samad Shams Vahdati Amir Ghaffarzad Armita Masoud | 2016 | World Journal of Emergency Medicine2016，7，2： | 2 |
| 4 | Mechanochemical leaching of chalcopyrite concentrate by sulfuric acid显示文摘This study aimed to introduce a new cost-effective methodology for increasing the leaching efficiency of chalcopyrite concentrates at ambient temperature and pressure. Mechanical activation was employed during the leaching(mechanochemical leaching) of chalcopyrite concentrates in a sulfuric acid medium at room temperature and atmospheric pressure. High energy ball milling process was used during the leaching to provide the mechanochemical leaching condition, and atomic absorption spectroscopy and cyclic voltammetry were used to determine the leaching behavior of chalcopyrite. Moreover, X-ray diffraction and scanning electron microscopy were used to characterize the chalcopyrite powder before and after leaching. The results demonstrated that mechanochemical leaching was effective; the extraction of copper increased significantly and continuously. Although the leaching efficiency of chalcopyrite was very low at ambient temperature, the percentages of copper dissolved in the presence of hydrogen peroxide(H_2O_2) and ferric sulfate(Fe_2(SO_4)_3) after 20 h of mechanochemical leaching reached 28% and 33%, respectively. Given the efficiency of the developed method and the facts that it does not require the use of an autoclave and can be conducted at room temperature and atmospheric pressure, it represents an economical and easy-to-use method for the leaching industry. | Farhad Khorramshahi Mohammadabad Sina Hejazi Jalil Vahdati khaki Abolfazl Babakhani | 2016 | International Journal of Minerals,Metallurgy and Materials2016，23，4： | 2 |
| 5 | Synthesis and characterization of carbon-coated cobalt ferrite nanoparticles显示文摘Cobalt ferrite nanoparticles(CFNPs) were prepared via a reverse micelle method. The CFNPs were subsequently coated with carbon shells by means of thermal chemical vapor deposition(TCVD). In this process, acetylene gas(C_2H_2) was used as a carbon source and the coating was carried out for 1, 2, or 3 h at 750℃. The Ar/C_2H_2 ratio was 10:1. Heating during the TCVD process resulted in a NP core size that approached 30 nm; the thickness of the shell was less than 10 nm. The composition, structure, and morphology of the fabricated composites were characterized using X-ray diffraction, simultaneous thermal analysis, transmission electron microscopy, high-resolution transmission electron microscopy, and selected-area diffraction. A vibrating sample magnetometer was used to survey the samples' magnetic properties. The deposited carbon shell substantially affected the growth and magnetic properties of the CFNPs. Micro-Raman spectroscopy was used to study the carbon coating and revealed that the deposited carbon comprised graphite, multiwalled carbon nanotubes, and diamond-like carbon. With an increase in coating time, the intensity ratio between the amorphous and ordered peaks in the Raman spectra decreased, which indicated an increase in crystallite size. | Hamed Bakhshi Ali Shokuhfar Nima Vahdati | 2016 | International Journal of Minerals,Metallurgy and Materials2016，23，9： | 2 |
| 6 | A fast flux search controller for DTC-based induction motor drives显示文摘 | Shahriyar Kaboli Mohammad Reza Zolghadri Esmaeel Vahdati Khajeh | 2007 | IEEE Trans Industrial Electronics2007，54，5： | 1 |
| 7 | Mieropropagation of some dwarf and early mature walnut genotypes 显示文摘 | Vahdati K Razaee R Mirmasoomi M | 2009 | Biotechno2009，8，： | 1 |
| 8 | An Integrated Nonlinear Ap- proach for TurbomachineryForced Response Prediction, Pan 1: Formulation 显示文摘 | Sayma A l Vahdati M Imregun M | 2000 | Journal of Fluids and Structures2000，14，1： | 1 |
| 9 | Adaptive remeshing for compressible flow computations显示文摘 | Peraire J Vahdati M Morgan K | 1987 | Journal of Computational Physics1987，72，2： | 1 |
| 10 | Adaptive remeshing for compressible flow computation 显示文摘 | Peraire J Vahdati M Morgan K | 1987 | J Comp1987，72，： | 1 |
| 11 | Adaptive remeshing for compressible flow computations显示文摘 | Peraire J Vahdati M Morgan K | 1987 | J of Computational Physics1987，75，： | 1 |
| 12 | An Integrated Nonlinear Ap- proach for TurbomachineryForced Response Prediction, Part Ⅱ: Case Studies显示文摘 | Vahdati M Sayma A l lmregun M | 2000 | Journal of Fluids and Structures2000，14，1： | 1 |
| 13 | Mechanisms and prediction methods for fan blade stall flutter显示文摘 | Vahdati M Sayma A I Marshall J G | 2001 | Journal of Propulsion and Power2001，17，5： | 1 |
| 14 | Adaptive remeshing for compressible flow computations显示文摘 | Peraire J Vahdati M Morgan K | 1987 | J Comput Phys1987，72，2： | 1 |
| 15 | Evaluation of sperm selection procedure based on hyaluronic acid binding ability on ICSI outcome 显示文摘 | Nasr-Esfahani MH Razavi S Vahdati AA | 2008 | J Assist Reprod Genet2008，25，5： | 1 |
| 16 | Transient dynamics of semi active suspensions with hybrid control显示文摘 | AHMADIAN M VAHDATI N | 2006 | Journal of Intelligent Material Systems and Structures2006，17，： | 1 |
| 17 | Finite element study of a tissue-engine- ered cartilage transplant in human tibiofemoral joint显示文摘 | Vahdati A Wagner DR | 2012 | Comput Methods Biomech Biomed Engin2012，15，11： | 1 |
| 18 | Antidepressant effects of crocin and its effects on transcript and protein levels of CREB, BDNF, and VGF in rat hippocampus 显示文摘 | Vahdati Hassani F Naseri V Razavi B | 2014 | Daru2014，22，1： | 1 |
| 19 | Adaptive remeshing for compressible flow computations显示文摘 | PERAIRE J VAHDATI M MORGAN K | 1987 | J Comp Phys1987，72，： | 1 |
| 20 | Efficacy of Chlorhexidine in Disinfecting Dentinal Tubules in Vitro显示文摘 | Vahdaty A Pitt Ford T R Wilson R F | 1993 | Endod Dent Traumatol1993，9，： | 1 |
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