좋은 영어 수업에 대한 대학생들의 인식 유형 분석

Maryam Paknahad Jabarooty,이재무 한국지식정보기술학회 2021 한국지식정보기술학회 논문지 Vol.16 No.1

This research is to clarify how college students think about quality English classes. We classified college students’ perceptions of a quality English class and analyzed the characteristics of each type. The research applied the Q-methodology to extract the subjective thoughts of college students. After extracting the statements through an advanced study, the 44 Q samples were selected. The P samples consisted of 38 general college students and 40 teachers college students who performed Q sort in a 44 Q sample questionnaire. The Q sort results were analyzed by performing the QUANL 1.2 program. Consequently, five types of perceptions on quality English classes were extracted based on students’ thoughts. These types were divided into five categories: <Type 1> Classes that improve expression through repetitive practice, <Type 2> Classes that improve English proficiency by piquing students' interests, <Type 3> Classes that evaluate learners' progress, <Type 4> Classes that improve students’ skills efficiently, and <Type 5> Classes where all learners achieve expected learning objectives. In addition, there was a significant difference in the types of students in general and teachers colleges according to the background knowledge of pedagogy. Besides, the difference in perception between male and female students appeared slightly different according to the type.

Shear capacity equation for channel shear connectors in steel-concrete composite beams

Masoud Paknahad,Mahdi Shariati,Yadollah Sedghi,Mohammad Bazzaz,Majid Khorami 국제구조공학회 2018 Steel and Composite Structures, An International J Vol.28 No.4

In this research the effect of high strength concrete (HSC) on shear capability of the channel shear connectors (CSC) in the steel concrete composite floor system was estimated experimentally and analytically. The push-out test was carried out for assessing the accurateness of the proposed model (nonlinear and finite element model) for the test specimens. A parametric analysis was conducted for predicting the shear capacity of the connectors (CSC) in the HSC. Eight push-out specimens of different sizes with different strength levels were tested under the monotonic loading system. The aim of this study was to evaluate the efficacy of the National Building Code of Canada (NBC) of Canada for analysing the loading abilities of the CSC in the HSC. Using the experimental tests results and verifying the finite element results with them, it was then confirmed by the extended parametric studies that the Canadian Design Code was less efficient for predicting the capacity of the CSC in the HSC. Hence, an alternative equation was formulated for predicting the shear capacity of these connectors during the inclusion of HSC for designing the codes.

Maternal Dietary Patterns and Their Association with Pregnancy Outcomes

( Zamzam Paknahad ),( Atefeh Fallah ),( Amir Reza Moravejolahkami ) 한국임상영양학회 2019 Clinical Nutrition Research Vol.8 No.1

Maternal nutritional status during pregnancy will affect the outcomes for the mother and the newborn. Maternal diet was assessed in 150 pregnant women during the first trimester of pregnancy by a 168-item food frequency questionnaire. Dietary patterns were explored by Factor analysis, and association of patterns with maternal and neonatal outcomes such as gestational diabetes mellitus (GDM), anemia and anthropometric indices were determined by analysis of variance and linear regression analysis. Three major dietary patterns were identified: 1) High Carbohydrate-Lower Fat (mean age, 27.67 ± 6.1; n = 34), 2) High Carbohydrate-Higher Fat (27.70 ± 4.1; n = 55), and 3) High Fiber (29.27 ± 5.8; n = 61). A significant difference was observed between maternal dietary patterns (p < 0.01) for GDM, while it was not significant for anemia. Also, the number of preterm and low birth weight (LBM) infants as well as mean weight, height and head circumference of the infants did not differ significantly between patterns, but there was a significant difference between the maternal dietary patterns about the number of macrosomic babies, which was higher in the second (n = 9) and third (n = 9) dietary patterns (p < 0.01). After adjusting for mothers' age, disease history, disease status, and energy intake, High Carbohydrate-Lower Fat dietary pattern was more associated with GDM than crude model (p = 0.01 vs. p = 0.02). The present study indicated a significant relationship between maternal dietary patterns before pregnancy and GDM and fetal macrosomia.

Solvothermal Synthesis of a Nano-sized Aza-aromatic Base Adduct of a Cadmium(II) 4,4-Difluoro-1-phenyl-1,3-butandionate Coordination Compound

Hanifehpour, Younes,Paknahad, Elham,Mirtamizdoust, Babak,Joo, Sang Woo Springer-Verlag 2012 Journal of inorganic and organometallic polymers a Vol.22 No.6

Hydrothermal Synthesis of a Nano-sized Mercury(II) N–N–O Donor Coordination Compound

Hanifehpour, Younes,Khanalilou, Samaneh,Paknahad, Elham,Joo, Sang Woo,Sadr, Moayad Hossaini,Soltani, Behzad Springer-Verlag 2012 Journal of inorganic and organometallic polymers a Vol.22 No.6

Optimization of shear connectors with high strength nano concrete using soft computing techniques

Sedghi, Yadollah,Zandi, Yosef,Paknahad, Masoud,Assilzadeh, Hamid,Khadimallah, Mohamed Amine Techno-Press 2021 Advances in nano research Vol.11 No.6

This paper conducted mainly for forecasting the behavior of the shear connectors in steel-concrete composite beams based on the different factors. The main goal was to analyze the influence of variable parameters on the shear strength of C-shaped and L-shaped angle shear connectors. The method of ANFIS (adaptive neuro fuzzy inference system) was applied to the data in order to select the most influential factors for the mentioned shear strength forecasting. Five inputs are considered: height, length, thickness of shear connectors together with concrete strength and respective slip of the shear connectors after testing. The ANFIS process for variable selection was also implemented in order to detect the predominant factors affecting the forecasting of the shear strength of C-shaped and L-shaped angle shear connectors. The results show that the forecasting methodology developed in this research is useful for enhancing the multiple performances characterizing in the shear strength prediction of C and L shaped angle shear connectors analyzing.

Dietary Intake of Thiamine in Migraine Patients and Healthy Subjects: a Case-Control Study

( Hossein Faraji ),( Zamzam Paknahad ),( Ahmad Chitsaz ) 한국임상영양학회 2018 Clinical Nutrition Research Vol.7 No.1

The migraine headache is a disease related to the neurovascular system, which affects 10%-20% of people, worldwide. Recent evidences suggested a relation between thiamine status and migraine headaches. The current study was undertaken to assess dietary intake of the thiamine in migraine patients and to evaluate its association with the frequency of migraine attacks. In a case-control design, the current study was performed on 50 migraine patients and 50 healthy people, 20-60 years old in Isfahan, Iran, in 2017. Information about dietary intake was collected by Food frequency questionnaire and analyzed using the Nutritionist version 4 (N4) software (Tinuviel Software). Information about the history of disease was collected by demographic questionnaire. Analysis of covariance and independent t-test were used for data analysis and p value less than 0.05 was considered significant. Mean age, weight, height, and body mass index of participants were 35.1 ± 9.8 years, 65.3 ± 10.4 kg, 162.5 ± 8.4 cm, and 24.7 ± 4.0 kg/m², respectively. Dietary intake of thiamine among the migraine patients was lower than that in the healthy participants (p < 0.001). Migraine patients with the high frequency attacks had significantly lower intake of thiamine compared with moderate frequency attacks group (p = 0.010), however, it was not significant after adjusting for energy intake (p = 0.410, p = 0.240). Dietary intake of thiamine in migraine patients was not significantly different in comparing with healthy subjects. In addition, no significant correlation between thiamine intake and the frequency of migraine attacks was observed.

Antioxidant Status and Risk of Gestational Diabetes Mellitus: a Case-Control Study

( Vida Mohammad Parast ),( Zamzam Paknahad ) 한국임상영양학회 2017 Clinical Nutrition Research Vol.6 No.2

Gestational diabetes mellitus (GDM) is described as glucose intolerance diagnosed during pregnancy. Increased oxidative stress has implicated in diabetic problems. The aim of the current study was to compare antioxidant capacity and antioxidant nutrient intake between women with GDM (n = 40) and healthy pregnant women (n = 40). Demographic and obstetrics data were completed using interview technique and dietary intakes by using a semi-quantitative food frequency questionnaire (FFQ) with 168 items. The total antioxidant capacity (TAC) of serum was assessed by double-antibody sandwich enzyme-linked immune-sorbent assay (ELISA) method. Multivariate logistic regression was performed to compare independent variables and other potential risk factors between 2 groups. The results showed that TAC concentration of serum in women with GDM was significantly lower than in healthy pregnant women (2.3 ± 0.7 vs. 3.7 ± 0.1 μmol/L, p < 0.001). Intakes of vitamin E (11.8 + 3.1 vs. 16.2 + 3.1 mg, p < 0.001), selenium (81 ± 26 vs. 95 ± 36 μg, p < 0.05) and zinc (7.4 ± 1.9 vs. 9.1 ± 1.7 mg, p < 0.001) were significantly lower in women with GDM as compared to healthy pregnant women. In contrast, the groups showed no significant difference in vitamin C, β-carotene, selenium, fruit, and vegetable intake. Our findings showed that antioxidant capacity is lower in women with GDM, possibly related to lower intakes of vitamin E and zinc.

Adiponectin Concentration in Gestational Diabetic Women: a Case-Control Study

( Tanin Mohammadi ),( Zamzam Paknahad ) 한국임상영양학회 2017 Clinical Nutrition Research Vol.6 No.4

Gestational diabetes mellitus (GDM) is an impaired fasting glucose condition during pregnancy. Adiponectin is a polypeptide hormone that is extensively released by adipocytes which regulates energy homeostasis and carbohydrate and lipid metabolism. In addition, adiponectin has antidiabetic and anti-inflammatory properties. The aim of our research was to study about the relationship of adiponectin levels to GDM and glucose intolerance. We selected 25 GDM women and 35 healthy pregnant subjects (18-46 years) who were screened between 24 and 28 weeks of gestation based on the result of oral glucose tolerance test (OGTT). We designed a case-control study and measured the concentrations of serum adiponectin and compared the concentrations between the groups. Serum adiponectin concentration was measured using enzyme-linked immunosorbent assay (ELISA). Sociodemographic data were collected by personal interview. Serum adiponectin concentrations were significantly lower in the subjects with GDM (5.10 ± 2.15 ng/mL vs. 7.86 ± 3.52 ng/mL, p = 0.001) than in healthy pregnant subjects. The mean concentration of fasting blood glucose was considerably lower in control subjects (86.9 ± 9.0 mg/dL vs. 175.9 ± 20.1 mg/dL, p < 0.001) in comparison to GDM subjects. Our findings showed that serum concentrations of adiponectin were significantly lower in gestational diabetic women and this may help to predict the risk of GDM.

Numerical simulation of soil-structure interaction in framed and shear-wall structures

Dalili, M.,Alkarni, A.,Noorzaei, J.,Paknahad, M.,Jaafar, M.S.,Huat, B.B.K. Techno-Press 2011 Interaction and multiscale mechanics Vol.4 No.1

This paper deals with the modeling of the plane frame structure-foundation-soil system. The superstructure along with the foundation beam is idealized as beam bending elements. The soil medium near the foundation beam with stress concentrated is idealized by isoparametric finite elements, and infinite elements are used to represent the far field of the soil media. This paper presents the modeling of shear wall structure-foundation and soil system using the optimal membrane triangular, super and conventional finite elements. Particularly, an alternative formulation is presented for the optimal triangular elements aimed at reducing the programming effort and computational cost. The proposed model is applied to a plane frame-combined footing-soil system. It is shown that the total settlement obtained from the non-linear interactive analysis is about 1.3 to 1.4 times that of the non-interactive analysis. Furthermore, the proposed model was found to be efficient in simulating the shear wall-foundation-soil system, being able to yield results that are similar to those obtained by the conventional finite element method.