The Impact of Practicing Autonomy on the Writing Proficiency of Iranian Intermediate EFL Learners

( Mohammad Sadegh Bagheri ),( Laleh Aeen ) 범태평양 응용언어학회 2011 Journal of Pan-Pacific Association of Applied Ling Vol.15 No.1

The present study examined the impact of practicing autonomy on the writing proficiency of Iranian intermediate EFL learners. To this end, Preliminary English Test (PET) by Thomas and Sharon (2006) was administered to 92 intermediate language learners as a pre-test. Accordingly, 60 homogeneous learners comprised the research sample. The participants were randomly divided into two similar groups, one as an autonomous group and the other as a non-autonomous group. Each group consisted of 30 learners. The autonomous group practiced autonomy in writing and the nonautonomous group followed a traditional approach to writing. Then, the participants were post-tested on writing. In order to compare the results of the treatment in the autonomous group with the nonautonomous group, t-test was used. The null hypothesis was rejected because the autonomous group outperformed the nonautonomous group.

Evaluation of sHLA-G levels in serum of patients with prostate cancer identify as a potential of tumor marker

Mohammad Hassan Heidari,Abolfazl Movafagh,Mohammad Amin Abdollahifar,Shabnam Abdi,Mohamadreza Mashhoudi Barez,Hadi Azimi,Afshin Moradi,Amin Bagheri,Matineh Heidari,Jafar Hessam Mohseni,Maryam Tadayon 대한해부학회 2017 Anatomy & Cell Biology Vol.50 No.1

Prostate cancer is the most common cancer type in men and is the second cause of death, due to cancer, in patients over 50, after lung cancer. Prostate specific antigen (PSA) is a widely used tumor marker for prostate cancer. Recently, PSA is discovered in non-prostatic cancer tissues in men and women raising doubts about its specificity for prostatic tissues. PSA exists in low serum level in healthy men and in higher levels in many prostate disorders, including prostatitis and prostate cancer. Thus, a supplementary tumor marker is needed to accurately diagnose the cancer and to observe the patient after treatment. Recently, soluble human leukocyte antigen-G (sHLA-G) has been introduced as a new tumor marker for different cancer types, including colorectal, breast, lung, and ovary. The present descriptive-experimental study was carried out including patients with malignant prostate tumor, patients with benign prostate tumor, and a group of health men as the control group, as judged by an oncologist as well as a pathologist. After sterile blood sampling, sHLA-G was measured by enzyme-linked immunosorbent assay in each group. The data was then analyzed using one-way ANOVA. P≤0.05 was considered as statistically significant. The results showed that the mean of sHLA-G level was high in patients. Also, it was found that there was a significant difference in sHLA serum level between the three groups. The data revealed that sHLA-G can be a novel upplementary tumor marker in addition to PSA to diagnose prostate cancer.

Weighted sum Pareto optimization of a three dimensional passenger vehicle suspension model using NSGA-II for ride comfort and ride safety

Bagheri, Mohammad Reza,Mosayebi, Masoud,Mahdian, Asghar,Keshavarzi, Ahmad 국제구조공학회 2018 Smart Structures and Systems, An International Jou Vol.22 No.4

The present research study utilizes a multi-objective optimization method for Pareto optimization of an eight-degree of freedom full vehicle vibration model, adopting a non-dominated sorting genetic algorithm II (NSGA-II). In this research, a full set of ride comfort as well as ride safety parameters are considered as objective functions. These objective functions are divided in to two groups (ride comfort group and ride safety group) where the ones in one group are in conflict with those in the other. Also, in this research, a special optimizing technique and combinational method consisting of weighted sum method and Pareto optimization are applied to transform Pareto double-objective optimization to Pareto full-objective optimization which can simultaneously minimize all objectives. Using this technique, the full set of ride parameters of three dimensional vehicle model are minimizing simultaneously. In derived Pareto front, unique trade-off design points can selected which are non-dominated solutions of optimizing the weighted sum comfort parameters versus weighted sum safety parameters. The comparison of the obtained results with those reported in the literature, demonstrates the distinction and comprehensiveness of the results arrived in the present study.

Multi-objective optimization of double wishbone suspension of a kinestatic vehicle model for handling and stability improvement

Mohammad Reza Bagheri,Masoud Mosayebi,Asghar Mahdian,Ahmad Keshavarzi 국제구조공학회 2018 Structural Engineering and Mechanics, An Int'l Jou Vol.68 No.5

One of the important problems in the vehicle design is vehicle handling and stability. Effective parameters which should be considered in the vehicle handling and stability are roll angle, camber angle and scrub radius. In this paper, a planar vehicle model is considered that two right and left suspensions are double wishbone suspension system. For a better analysis of the suspension geometry, a kinestatic model of vehicle is considered which instantaneous kinematic and statics relations are analyzed simultaneously. In this model, suspension geometry is considered completely. In order to optimum design of double wishbones suspension system, a multi-objective genetic algorithm is applied. Three important parameters of suspension including roll angle, camber angle and scrub radius are taken into account as objective functions. Coordinates of suspension hard points are design variables of optimization which optimum values of them, corresponding to each optimum point, are obtained in the optimization process. Pareto solutions for three objective functions are derived. There are important optimum points in these Pareto solutions which each point represents an optimum status in the model. In other words, corresponding to any optimal point, a specific geometric position is determined for the suspension hard points. Each of the obtained points in the Pareto optimization can be selected for a special design purpose by designer to create an optimum condition in the vehicle handling and stability.

Effects of Etymological Elaboration on the EFL Learners` Comprehension and Retention of Idioms

( Mohammad Sadegh Bagheri ),( Ismaeil Fazel ) 범태평양 응용언어학회 2010 Journal of Pan-Pacific Association of Applied Ling Vol.14 No.1

In recent years, idioms have received overwhelming attention in language pedagogy. Experts in the field have sought ways to optimize learning and teaching of these prefabricated language chunks. It is now maintained that the meaning of idioms which was once deemed as arbitrary is somehow ``motivated`` by their literal, original usage. Referring to the etymology of idioms in order to understand their idiomatic meaning is called`` etymological elaboration``. This study sought to explore the effect of this technique on learners` comprehension as well as retention of idioms. It appears that this effect can be explained by Dual Coding Theory where the etymological association calls up a mental image of a concrete scene which can be stored alongside the verbal form in memory. In this experiment 50 Iranian advanced students studying English at Bahar Language Institute, Shiraz were divided into two homogeneous groups of experimental and control. The test of the former group comprised a matching task pertaining to the origin of idioms, a multiple - choice task concerning the idiomatic meaning of idioms, a multiple-choice task regarding the idiomatic meaning of idioms and a gap-filling task in which subjects were supposed to provide the missing keyword for each idiom. The control group just had a test including multiple choice as well as gap filling tasks. The matching task was utilized as a treatment to demonstrate the effect of knowing the origin of idioms on the participants` performance on the other tasks. The participants` mean scores were calculated , in both identify-the-meaning` and ``gap-filling`` tasks, the mean score of participants provided with the etymological elaboration was more than those who did not receive this treatment, which indicated that etymological elaboration enhanced the learners comprehension and retention of idioms effectively.

Investigating the Effect of Surface Roughness Size and Shape on the Nanofluid Behavior and Nanoparticles Aggregation in a Square Nanochannel by Molecular Dynamics Simulation

Bagheri Motlagh Mohammad,Kalteh Mohammad,Srinivasan Seshasai 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.5

In this article, the eff ect of surface roughness size and shape on the Poiseuille fl ow of Ar–Cu nanofl uid in a square copper nanochannel is investigated. To do this, hemispherical, cubic, semi-cylindrical roughness, shapes extended along the nanochannel length and width, and square protrusions extended along the nanochannel length and width are studied. The simulations are carried out using the molecular dynamics method and LAMMPS software. The results show that the roughness causes a change in the velocity and structure of nanofl uid atoms in the nanochannel. For example, the hemispherical roughness with a height of 7.5Å causes 24% decrease in the nanofl uid velocity. Also, the results show that the eff ect of diff erent shapes and sizes of roughness on the nanofl uid behavior is diff erent. For example, at the same height of roughness ( 7.5Å ), the velocity diff erence created by diff erent roughness shapes is around 0.208 Å ps , which is around 13% of the nanofl uid velocity in the smooth state. Additionally, it is found that the roughness makes the nanofl uid velocity profi le fl atter in the central part of the nanochannel. Also, the results reveal that the shape and height of the roughness have an eff ect on the aggregation time of nanoparticles and on how they move in the nanofl uid. Specifi cally, increasing the height of the roughness and decreasing the velocity of the nanofl uid, decreases the accumulation time of nanoparticles.

Design and numerical investigation of an adaptive intramedullary nail with a novel interlocking mechanism

Mohammad Ali Bagheri,Gholamreza Rouhi 한국CDE학회 2020 Journal of computational design and engineering Vol.7 No.6

Malalignment is a common complication in the treatment of distal fractures of the tibia. Numerous efforts have been made to reduce the malalignment ratio. However, the reported cases with this disorder are still high. This study aimed at investigating an adaptive design of an intramedullary nail with a novel interlocking mechanism (AINIM), as an alternative for the customary nailing, in reducing malalignment ratio. A verified finite element model was employed to compare the performance of AINIM with the customary nail. The finite element model of the tibia follows the exact shape of the medullary canal, and nonhomogeneous material properties were assigned to the bone from bone ash density. It was assumed that the nails were implanted and interlocked in the tibia according to surgical protocols, and physiological-like loading was applied to finite element models. The results of this study showed that AINIM reduces the mean shear interfragmentary strains by about 30%, and the axial interfragmentary strain by 55%, also it increases the uniformity in the interfragmentary movements, compared to the customary nail. It was also found that AINIM caused a reduction of the stress on the nail by 60%, and an increase of 25% on the bone, compared to the customary nail. Moreover, average compressive principal strains in the tibia fixed by AINIM increased by 40% from 485 to 678 με, compared to the tibia fixed by the customary nailing method. The results of this work also showed that AINIM causes an increase in the contact area with the intramedullary canal, particularly at the fracture site, and it also escalates the magnitude of contact pressure. Results of this work indicate that, from the biomechanical standpoint, the adaptive nail, i.e. AINIM, with an innovative interlocking mechanism, compared to the customary nailing, can lessen intra- and post-operative malalignment occurrence, and it also mitigates the side effects of stress shielding, and thus better conserves neighboring bone density in a long period.

Weighted sum Pareto optimization of a three dimensional passenger vehicle suspension model using NSGA-II for ride comfort and ride safety

Mohammad Reza Bagheri,Masoud Mosayebi,Ahmad Keshavarzi 국제구조공학회 2018 Smart Structures and Systems, An International Jou Vol.22 No.4

The present research study utilizes a multi-objective optimization method for Pareto optimization of an eight-degree of freedom full vehicle vibration model, adopting a non-dominated sorting genetic algorithm II (NSGA-II). In this research, a full set of ride comfort as well as ride safety parameters are considered as objective functions. These objective functions are divided in to two groups (ride comfort group and ride safety group) where the ones in one group are in conflict with those in the other. Also, in this research, a special optimizing technique and combinational method consisting of weighted sum method and Pareto optimization are applied to transform Pareto double-objective optimization to Pareto full-objective optimization which can simultaneously minimize all objectives. Using this technique, the full set of ride parameters of three dimensional vehicle model are minimizing simultaneously. In derived Pareto front, unique trade-off design points can selected which are non-dominated solutions of optimizing the weighted sum comfort parameters versus weighted sum safety parameters. The comparison of the obtained results with those reported in the literature, demonstrates the distinction and comprehensiveness of the results arrived in the present study.

Therapeutic Outcomes of Pectoralis Major Muscle Turnover Flap in Mediastinitis

Reza Bagheri,Mohammad Abbasi Tashnizi,Seyed Ziaollah Haghi,Maryam Salehi,Ata’ollah Rajabnejad,Mohsen Hatami Ghale Safa,Mohammad Vejdani 대한흉부외과학회 2015 Journal of Chest Surgery (J Chest Surg) Vol.48 No.4

Background: This study aimed to evaluate the therapeutic results and safety of pectoralis major muscle turnover flaps in the treatment of mediastinitis after coronary artery bypass grafting (CABG) procedures. Methods: Data regarding 33 patients with post-CABG deep sternal wound infections (DSWIs) who underwent pectoralis major muscle turnover flap procedures in the Emam Reza and Ghaem Hospitals of Mashhad, Iran were reviewed in this study. For each patient, age, sex, hospital stay duration, remission, recurrence, and associated morbidity and mortality were evaluated. Results: Of the 2,447 CABG procedures that were carried out during the time period encompassed by our study, DSWIs occurred in 61 patients (2.5%). Of these 61 patients, 33 patients (nine females [27.3%] and 24 males [72.7%]) with an average age of 63±4.54 years underwent pectoralis major muscle turnover flap placement. Symptoms of infection mainly occurred within the first 10 days after surgery (mean, 10.24±13.62 days). The most common risk factor for DSWIs was obesity (n=16, 48.4%) followed by diabetes mellitus (n=13, 39.4%). Bilateral and unilateral pectoralis major muscle turnover flaps were performed in 20 patients (60.6%) and 13 patients (39.4%), respectively. Complete remission was achieved in 25 patients (75.7%), with no recurrence in the follow-up period. Four patients (12.1%) needed reoperation. The mean hospitalization time was 11.69±6.516 days. Four patients (12.1%) died during the course of the study: three due to the postoperative complication of respiratory failure and one due to pulmonary thromboembolism. Conclusion: Pectoralis major muscle turnover flaps are an optimal technique in the treatment of post-CABG mediastinitis. In addition to leading to favorable therapeutic results, this flap is associated with minimal morbidity and mortality, as well as a short hospitalization time.

Should all patients with hypertension be worried about developing severe coronavirus disease 2019 (COVID-19)?

Bahardoust Mansour,Goharrizi Mohammad Ali Sheikh Beig,Bahardoust Mansour,Alvanegh Akbar Ghorbani,Ataee Mohammad Reza,Bagheri Mehdi,Navidiyan Ensiyeh Shabani,Zijoud Seyed Reza Hosseini,Heiat Mohammad 대한고혈압학회 2021 Clinical Hypertension Vol.27 No.2

Background: Hypertension, the most common comorbidity among coronavirus disease 2019 (COVID-19) patients, is accompanied by worse clinical outcomes, but there is lack of evidence about prognostic factors among COVID19 patients with hypertension. We have come up with some prognostic factors to predict the severity of COVID-19 among hypertensive patients. In addition, epidemiologic, clinical and laboratory differences among COVID-19 patients with and without underlying hypertension were evaluated. Methods: Medical profiles of 598 COVID-19 cases were analyzed. Patients were divided into two comparative groups according to their positive or negative history of hypertension. Then, epidemiologic, clinical, laboratory and radiological features and also clinical outcomes were compared. Results: 176 (29.4%) patients had underlying hypertension. Diabetes was significantly higher in hypertensive group [72 (40.9%) vs 76 (18%)] (P-value: 0.001). Cardiovascular and renal disorders were significantly higher in hypertensive patients. (P-value: 0.001 and 0.013 respectively). In COVID-19 patients with hypertension, severe/critical types were significantly higher. [42(23.8%) vs. 41(9.7%)], (P-value: 0.012). In the logistic regression model, Body mass index > 25 (ORAdj: 1.8, 95% CI: 1.2 to 2.42; P-value: 0.027), age over 60 (ORAdj: 1.26, 95% CI: 1.08 to 1.42; P-value: 0.021), increased hospitalization period (ORAdj: 2.1, 95% CI: 1.24 to 2.97; P-value: 0.013), type 2 diabetes (ORAdj: 2.22, 95% CI: 1.15 to 3.31; P-value: 0.001) and chronic kidney disease (ORAdj: 1.83, 95% CI: 1.19 to 2.21; P-value: 0.013) were related with progression of COVID-19. Conclusion: Hypertensive patients with Age > 60-year-old, BMI > 25 Kg/m2 , CVD, diabetes and chronic kidney disease are associated with poor outcomes in those with COVID-19 infection.