ORCID Profile
0000-0003-1589-5778
Current Organisation
Iran University of Science and Technology
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Publisher: Springer Science and Business Media LLC
Date: 02-08-2014
Publisher: Springer Science and Business Media LLC
Date: 09-2018
Publisher: SAGE Publications
Date: 21-01-2015
Abstract: In the present study, regarding the theoretical and practical aspects of nanoparticle capture in liquid-state processing of aluminum composite, different volume fractions of [Formula: see text] and [Formula: see text] nanopowders were incorporated into aluminum alloy via stir casting method. Hardness and sliding wear test were carried out to evaluate the mechanical properties of composites. The effects of wear load and reinforcement content on wear rate and friction coefficient of composites were examined. Microstructural studied showed that particle distribution in A356-[Formula: see text] composites was more favorable than that of the A356-[Formula: see text] s les. Results showed that nanoparticles were partially captured by aluminum matrix. With an increase in reinforcement content the amount of porosity and rejected nanoparticles increased. Regarding the wettability features of particles, the amount of introduced [Formula: see text] powders was higher than that of [Formula: see text] particles. A356-[Formula: see text] composites showed higher mechanical properties compared with those of A356-[Formula: see text] s les. Significant improvements in hardness and wear resistance were obtained in A356-1.5 vol.% [Formula: see text] composite. It was observed that the friction coefficient of the composites was lower than that of the non-reinforced alloy. With an increase in normal wear load, wear rate of composites increased and friction coefficient of reinforced s les decreased. Study on surface morphology of the worn surfaces showed both of the mild and sever wear mechanisms. The depth and number of grooves in worn surface of composites decreased with introduction of nanoparticles into matrix. The presence of oxide layers was detected on worn surface. Iron trace was observed in wear debris of s les.
Publisher: Elsevier BV
Date: 03-2016
Publisher: Elsevier BV
Date: 12-2017
Publisher: Elsevier BV
Date: 04-2018
Publisher: Elsevier BV
Date: 04-2016
Publisher: Elsevier BV
Date: 02-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
Publisher: Elsevier BV
Date: 04-2018
Publisher: MDPI AG
Date: 31-10-2017
DOI: 10.3390/MA10111255
Publisher: AIP Publishing
Date: 03-2021
DOI: 10.1063/5.0043009
Abstract: The COVID-19 pandemic is the largest global public health outbreak in the 21st century so far. Based on World Health Organization reports, the main source of SARS-CoV-2 infection is transmission of droplets released when an infected person coughs, sneezes, or exhales. Viral particles can remain in the air and on the surfaces for a long time. These droplets are too heavy to float in air and rapidly fall down onto the surfaces. To minimize the risk of the infection, entire surrounding environment should be disinfected or neutralized regularly. Development of the antiviral coating for the surface of objects that are frequently used by the public could be a practical route to prevent the spread of the viral particles and inactivation of the transmission of the viruses. In this short review, the design of the antiviral coating to combat the spread of different viruses has been discussed and the technological attempts for minimizing the coronavirus outbreak have been highlighted.
Publisher: Elsevier BV
Date: 02-2019
DOI: 10.1016/J.JENVMAN.2018.10.083
Abstract: A 32-week leaching column study was carried out in the greenhouse to investigate the effects of incorporation of gypsum, cattle manure, biosolids, gypsum plus cattle manure and gypsum plus biosolids into the topsoil layer (0-10 cm) on growth of Rhodes grass, and on root distribution and chemical and microbial properties in the topsoil and subsoil (10-30 cm) layers of seawater neutralized bauxite residues. The columns were leached for a period of 8 weeks prior to sowing Rhodes grass and during that time the bulk of the salts accumulated during seawater neutralization were leached out. The main cation leached was Na
Publisher: Elsevier BV
Date: 04-2019
Publisher: Elsevier BV
Date: 03-2019
DOI: 10.1016/J.JCIS.2018.12.090
Abstract: The development of high performance, sustainable and inexpensive catalyst for environmental applications is a highly innovative and promising approach to meet the increasing demands from society on water treatment and pollution remediation. Carbon microtube (CMT) synthesized from cotton waste was successfully developed by direct pyrolysis of cotton bundle in argon atmosphere in different carbonization temperature (900, 1100, 1300 and 1500 °C). Carbon microtubes have been used for removal of Bisphenol A (BPA) in wastewater and showed the optimum performance for CMT11 and CMT 13. The mechanism involved in this efficient water treatment was ascribed to the strong π-π interaction and hydrogen bonds between CMT and BPA. Given the repeatability, high removal performance and cost effectiveness of the cotton based carbon microtubes when compared to other well-known catalysts such as carbon nanotubes, the carbon microtubes demonstrated great potential as low-cost, sustainable and effective catalyst for wastewater treatment.
Publisher: Elsevier BV
Date: 05-2020
Publisher: S. Karger AG
Date: 2014
DOI: 10.1159/000366202
Abstract: b i Overview: /i /b Working music theater singers (MTS) typically have a heavy vocal load and little is known about their perception of vocal function. The Evaluation of the Ability to Sing Easily (EASE) was used to assess professional MTS' perceptions of current singing voice status and to compare scores across demographic and performance characteristics and to evaluate the construct validity of the EASE and its subscales (VF = Vocal Fatigue, PRI = Pathologic-Risk Indicators). b i Methods: /i /b Professional MTS (n = 284) completed an online survey including the EASE and two additional Vocal Concern (VC) items. Scores were compared across age, gender, whether currently working, role, perceived vocal load over the past 24 h and self-reported voice problem. b i Results: /i /b For the whole cohort, statistically significant differences were found on all subscales according to whether or not singers perceived themselves to have a voice problem (p 0.001). Currently performing singers were significantly different from those not performing in a show on the EASE Total (p = 0.014) and VF (p = 0.002), but not for PRI and VC. In the currently performing singer group, significant differences were found for gender, role and perceived voice problem on the EASE Total and all subscales (p 0.01). Significantly higher VF scores were recorded for singers with heavy vocal load (p = 0.01), but there were no differences on the EASE Total (p = 0.57), PRI (p = 0.19) or VC subscales (p = 0.53). Among these performing singers, no significant age differences were found for any EASE subscales. b i Conclusions: /i /b These findings provide further validation of the EASE as a useful tool for measuring singers' perceptions of vocal function and suggest that the subscales should be scored separately. Future evaluation of the EASE against objective clinical assessments (e.g., videostroboscopy) is recommended. © 2014 S. Karger AG, Basel
Publisher: Elsevier BV
Date: 2017
Publisher: Elsevier BV
Date: 2017
Publisher: Elsevier BV
Date: 12-2016
Publisher: Elsevier BV
Date: 02-2019
Publisher: Springer Science and Business Media LLC
Date: 12-09-2014
Publisher: Elsevier BV
Date: 12-2020
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 12-2020
Publisher: Elsevier BV
Date: 06-2018
Publisher: Wiley
Date: 03-06-2020
Publisher: Elsevier BV
Date: 06-2018
Publisher: Elsevier BV
Date: 04-2018
Publisher: Elsevier BV
Date: 08-2019
Publisher: Elsevier BV
Date: 12-2016
Publisher: Elsevier BV
Date: 05-2017
Publisher: Elsevier BV
Date: 07-2018
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 04-2017
Location: Iran (Islamic Republic of)
No related grants have been discovered for Gheffar Kara.