A Survey of EFL Instructors` Mediative Knowledge across Contexts of Teaching

( Rezaee Manesh,N. ),( Tahriri A. ) 범태평양응용언어학회 2014 범태평양응용언어학회지 Vol.18 No.2

The current mixed-method study probed EFL instructors`` mediative knowledge across four different contexts of teaching including language institutes, universities, and senior and junior high schools in Iran. To this end, 181 EFL instructors, 80 males and 101 females, completed mediative closed-questionnaire which composed of twelve items to measure EFL instructors`` knowledge of mediation across context. Out of 181, 72 participants, 16 (22%) institute instructors, 20 (28%) university instructors, 19 (26.38%) senior instructors, and 17 (23.61%) junior instructors participated in oral interview. Results of descriptive statistics and Chi-square showed that there exist significant differences among EFL instructors in seven mediative items; furthermore, the difference shows that there exists relationship between EFL instructors`` mediative knowledge across the contexts; however, in five mediative items, no differences were found across contexts. Results of oral interview of EFL instructors in terms of assessment revealed that they mostly believed that learners through instructors`` guidance should self-assess their learning and behavior. To achieve such an end, they suggested instructors`` step by step scaffolding and strategic deliverance of assessment to the learners. In terms of cooperation and individualization, the results of oral interview revealed that instructors believed in unified improvement of both of them. To improve both, pair and group works were suggested to boost cooperation whereas competition and individual activities were suggested to foster individualization. Context variation due to its own community and unique characteristics, learners`` potential to self-assess their learning, and development of whole learner were suggested to be taken into consideration by instructors, educationalists, parents, and curriculum, and course designers.

Dividing a sphere into equal-area and/or equilateral spherical polygons

Rezaee Javan Anooshe,Lee Ting-Uei,Xie Yi Min 한국CDE학회 2022 Journal of computational design and engineering Vol.9 No.2

Dividing a sphere uniformly into equal-area or equilateral spherical polygons is useful for a wide variety of practical applications. However, achieving such a uniform subdivision of a sphere is a challenging task. This study investigates two classes of sphere subdivisions through numerical approximation: (i) dividing a sphere into spherical polygons of equal area; and (ii) dividing a sphere into spherical polygons with a single length for all edges. A computational workflow is developed that proved to be efficient on the selected case studies. First, the subdivisions are obtained based on spheres initially composed of spherical quadrangles. New vertices are allowed to be created within the initial segments to generate subcomponents. This approach offers new opportunities to control the area and edge length of generated subdivided spherical polygons through the free movement of distributed points within the initial segments without restricting the boundary points. A series of examples are presented in this work to demonstrate that the proposed approach can effectively obtain a range of equal-area or equilateral spherical quadrilateral subdivisions. It is found that creating gaps between initial subdivided segments enables the generation of equilateral spherical quadrangles. Secondly, this study examines spherical pentagonal and Goldberg polyhedral subdivisions for equal area and/or equal edge length. In the spherical pentagonal subdivision, gaps on the sphere are not required to achieve equal edge length. Besides, there is much flexibility in obtaining either the equal area or equilateral geometry in the spherical Goldberg polyhedral subdivisions. Thirdly, this study has discovered two novel Goldberg spherical subdivisions that simultaneously exhibit equal area and equal edge length.

Fluid flow dynamics in deformed carbon nanotubes with unaffected cross section

Rezaee, Mohammad,Yeganegi, Arian,Namvarpour, Mohammad,Ghassemi, Hojat Techno-Press 2022 Advances in nano research Vol.12 No.3

Numerical modelling of an integrated Carbon NanoTube (CNT) membrane is only achievable if probable deformations and realistic alterations from a perfect CNT membrane are taken into account. Considering the possible forms of CNTs, bending is one of the most probable deformations in these high aspect ratio nanostructures. Hence, investigation of effect associated with bent CNTs are of great interest. In the present study, molecular dynamics simulation is utilized to investigate fluid flow dynamics in deformed CNT membranes, specifically when the tube cross section is not affected. Bending in armchair (5,5) CNT was simulated using Tersoff potential, prior to flow rate investigation. Also, to study effect of inclined entry of the CNT to the membrane wall, argon flow through generated inclined CNT membranes is examined. The results show significant variation in both cases, which can be interpreted as counter-intuitive, since the cross section of the CNT was not deformed in either case. The distribution of fluid-fluid and fluid-wall interaction potential is investigated to explain the anomalous behavior of the flow rate versus bending angle.

Vibration control in wind turbines for performance enhancement: A comparative study

Rezaee, Milad,Aly, Aly Mousaad Techno-Press 2016 Wind and Structures, An International Journal (WAS Vol.22 No.1

The need for a more affordable, reliable, clean and secure energy has led to explorations in non-traditional sources, particularly renewable energies. Wind is one of the cleanest energy sources that plays a significant role in augmenting sustainability. Wind turbines, as energy convertors, are usually tall and slender structures, and depending on their location (inland or offshore), they can be subject to high wind and/or strong wave loadings. These loads can cause severe vibrations with detrimental effects on energy production, structural lifecycle and initial cost. A dissipativity analysis study was carried out to know whether wind turbine towers require damping enhancement or rigidity modifications for vibration suppression. The results suggest that wind turbines are lightly damped structures and damping enhancement is a potential solution for vibration lessening. Accordingly, the paper investigates different damping enhancement techniques for vibration mitigation. The efficacy of tuned mass damper (TMD), tuned liquid column damper (TLCD), tuned sloshing damper (TSD), and viscous damper (VD) to reduce vibrations is investigated. A comparison among these devices, in terms of robustness and effectiveness, is conducted. The VD can reduce both displacement and acceleration responses of the tower, better than other types of dampers, for the same control effort, followed by TMD, TSD, and finally TLCD. Nevertheless, the use of VDs raises concerns about where they should be located in the structure, and their application may require additional design considerations.

New families of cage-like structures based on Goldberg polyhedra with non-isolated pentagons

Rezaee Javan Anooshe,Liu Yuanpeng,Xie Yi Min 한국CDE학회 2023 Journal of computational design and engineering Vol.10 No.2

A Goldberg polyhedron is a convex polyhedron made of hexagons and pentagons that have icosahedral rotational symmetry. Goldberg polyhedra have appeared frequently in art, architecture, and engineering. Some carbon fullerenes, inorganic cages, viruses, and proteins in nature exhibit the fundamental shapes of Goldberg polyhedra. According to Euler’s polyhedron formula, an icosahedral Goldberg polyhedron always has exactly 12 pentagons. In Goldberg polyhedra, all pentagons are surrounded by hexagons only—this is known as the isolated pentagon rule (IPR). This study systematically developed new families of cage-like structures derived from the initial topology of Goldberg polyhedra but with the 12 pentagons fused in five different arrangements and different densities of hexagonal faces. These families might be of great significance in biology and chemistry, where some non-IPR fullerenes have been created recently with chemical reactivity and properties markedly different from IPR fullerenes. Furthermore, this study has conducted an optimization for multiple objectives and constraints, such as equal edge length, equal area, planarity, and spherical shape. The optimized configurations are highly desirable for architectural applications, where a structure with a small number of different edge lengths and planar faces may significantly reduce the fabrication cost and enable the construction of surfaces with flat panels.

Berberine Alleviates Paclitaxel-Induced Neuropathy

Rezaee, Ramin,Monemi, Alireza,SadeghiBonjar, Mohammad Amin,Hashemzaei, Mahmoud KOREAN PHARMACOPUNCTURE INSTITUTE 2019 Journal of pharmacopuncture Vol.22 No.2

Objectives: Paclitaxel (PTX) as an anticancer drug used against solid cancers, possesses adverse reactions such as neuropathic pain which has confined its use. PTX-induced neuropathic pain is mediated via activation of oxidative stress. Berberine (BER), an isoquinoline phytochemical found in several plants, exerts strong antioxidant and painkilling properties. In the current study, we aimed to evaluate pain-relieving effect of BER in a mouse model of PTX-induced neuropathic pain. Methods: This study was done using 42 male albino mice that were randomly divided into 6 groups (n = 7) as follow: Sham-operated (not treated with PTX), negative control group (PTX-treated mice receiving normal saline), BER 5, 10, and 20 mg/kg (PTX-treated mice receiving BER) and positive control group (PTX-treated mice receiving imipramine 10 mg/kg). Neuropathic pain was induced by intraperitoneal administration of four doses of PTX (2 mg/kg/day) on days 1, 3, 5 and 7. Then, on day 7, hot plate test was done to assess latency to heat to measure possible anti-neuropathic pain effect of BER. Results: Four doses of PTX 2 mg/kg/day induced neuropathy that was reduced by BER at all time-points (i.e. 0, 30, 60, 90 and 120 min) after injection (P < 0.001 in comparison to control). The statistical analysis of data showed significant differences between groups (P < 0.001 in comparison to negative control), at 30, 60, 90 and 120 min after injection of BER 5, 10 and 20 mg/kg; in other words, 30, 60, 90 and 120 min after BER administration, neuropathic pain was significantly reduced as compared to normal saline-treated mice. Conclusion: Altogether, our results showed that PTX could induce neuropathic pain as reflected by hyperalgesia and BER could alleviate PTX-induced thermal hyperalgesia.

Expression of Escherichia coli Heat-labile Enterotoxin B Subunit (LTB) in Saccharomyces cerevisiae

Rezaee Mohammad Ahangarzadeh,Rezaee Abbas,Moazzeni Seyed Mohammad,Salmanian Ali Hatef,Yasuda Yoko,Tochikubo Kunio,Pirayeh Shahin Najar,Arzanlou Mohsen The Microbiological Society of Korea 2005 The journal of microbiology Vol.43 No.4

Heat-labile enterotoxin B subunit (LTB) of enterotoxigenic Escherichia coli (ETEC) is both a strong mucosal adjuvant and immunogen. It is a subunit vaccine candidate to be used against ETEC-induced diarrhea. It has already been expressed in several bacterial and plant systems. In order to construct yeast expressing vector for the LTB protein, the eltB gene encoding LTB was amplified from a human origin enterotoxigenic E. coli DNA by PCR. The expression plasmid pLTB83 was constructed by inserting the eltB gene into the pYES2 shuttle vector immediately downstream of the GAL1 promoter. The recombinant vector was transformed into S. cerevisiae and was then induced by galactose. The LTB protein was detected in the total soluble protein of the yeast by SDS-PAGE analysis. Quantitative ELISA showed that the maximum amount of LTB protein expressed in the yeast was approximately $1.9\%$ of the total soluble protein. Immunoblotting analysis showed the yeast-derived LTB protein was antigenically indistinguishable from bacterial LTB protein. Since the whole-recombinant yeast has been introduced as a new vaccine formulation the expression of LTB in S. cerevisiae can offer an inexpensive yet effective strategy to protect against ETEC, especially in developing countries where it is needed most.

Modeling the Problem of Choosing an Optimal Strategy to Respond to Project Risks

Fahimeh Rezaee,Majid Sabzeparvar,Hamed Tayebee 대한산업공학회 2018 Industrial Engineeering & Management Systems Vol.17 No.4

The project risk management is a systematic process of identifying, analyzing and responding to project risks in orderto maximize results of positive events and minimize consequences of bad and negative events that can affect mainobjectives of the project. In this process, the phase of risk response is a very important phase; because the effectivenessof responses directly determines increase or decrease of the project risk. Planning risk responses is the process ofidentifying different options and actions for reducing or eliminating threats and increasing or exploiting opportunitiesrelated to objectives of the project. Therefore, in this research, a systematic approach which is a combination of fuzzymulti-objective decision-making methods and zero-one integer programming model, is proposed to select the bestsolutions for responding to project risks. Also, since project risk management process has different stages, the stagesbefore accountability phase include identifying and analyzing quality of the risks, and choosing critical risks is alsodone for accountability. Finally, in order to select the best solution for each of the critical risks, a zero-one multiobjectivemathematical model is presented in a fuzzy environment and a case study is carried out on the Khangirangas field (Shourijeh).

Single-step Synthesis and Characterization of Zr-MOF onto Wool Fabric: Preparation of Antibacterial Wound Dressing with High Absorption Capacity

Reihane Rezaee,Majid Montazer,Ali Mianehro,Mahnaz Mahmoudirad 한국섬유공학회 2022 Fibers and polymers Vol.23 No.2

Improvement of curative herbal extracts effectiveness through novel drug delivery systems is a field of study forthe researches nowadays. Zirconium-based metal-organic frameworks (Zr-MOFs) are one of the most capable porousnanocarriers that need a biocompatible template to be used in biomedical applications. In this work, Zr-MOF was synthesizedinto the wool fabric through in-situ one-pot method with different molar ratios. The final fabrics were characterizedthoroughly using various techniques and the effect of components on monodispersity and nucleation tendency of Zr-MOFonto the surface of wool were explained. The resultant fabric stablished absolute wash durability, increased air-permeabilityup to twice and reasonable hydrophilicity. Tensile strength and young modulus decreased 30 and 1244 % and strain increased66 %. Salvia Officinalis (SO) and Calendula Officinalis (CO) extracts were loaded onto the modified fabrics with 1154 and1842 % increased absorption capacity. The release profiles showed domination of diffusion mechanism. The wool-MOF-SOand CO displayed both 100 % antibacterial activity against Escherichia coli and 60.95 and 64.64 % against Staphylococcusaureus because of diverse antibacterial components. Calendula Officinalis proved biocompatibility with human skin howeverSalvia Officinalis exhibited high toxicity.

Behavior of exterior concrete beam-column joints reinforced with Shape Memory Alloy (SMA) bars

Hossein Rezaee Azariani,M. Reza Esfahani,Hashem Shariatmadar 국제구조공학회 2018 Steel and Composite Structures, An International J Vol.28 No.1

This research was conducted to study the behavior of exterior concrete beam-column joints with reinforced shape memory alloy (SMA) bars tested under cyclic loading. These bars benefit from superelastic behavior and can stand high loads without residual strains. The experimental part of the study, 8 specimens of exterior concrete beam-column joints were made and tested. Two different types of concrete with 30 and 45 MPa were used. Four specimens contained SMA bars and 4 specimens contained steel bars in beam-column joints. Furthermore, different transverse reinforcements were used in beams investigate the effects of concrete confinement. Specimens were tested under cyclic loading. Results show that SMA bars are capable of recentering to their original shape after standing large displacements. Due to the superelastic behavior of SMA bars, cracks at the joint core vanish under cyclic loading. As the cyclic loading increased, bending failure occurred in the beam outside the joint core. In the analytical parts of the study, specimens were simulated using the SeismoStruct software. Experimental and analytical results showed a satisfactory correlation. Plastic hinge length at the beam joint for specimens with SMA and steel bars was calculated by empirical equations, experimental and analytical results. It was shown that Paulay's and Priestley's equations are appropriate for concrete beam-column joints in both types of bars.