A New Synchronous Reference Frame-Based Method for Single-Phase Shunt Active Power Filters

Monfared, Mohammad,Golestan, Saeed,Guerrero, Josep M. The Korean Institute of Power Electronics 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.4

This paper discusses the design of a novel synchronous reference frame (SRF) method that can extract the reference compensating current for single-phase shunt active power filters (APFs). Unlike previous SRF studies, the proposed method has an innovative feature that does not require a fictitious current signal. Other key features of the proposed strategy include frequency-independent operation, accurate reference current extraction, and relatively fast transient response. The effectiveness of the proposed method is investigated by conducting a detailed mathematical analysis. Results of the analysis confirm the superior performance of the suggested approach. Theoretical evaluations are confirmed by the experimental results.

A New Synchronous Reference Frame-Based Method for Single-Phase Shunt Active Power Filters

Mohammad Monfared,Saeed Golestan,Josep M. Guerrero 전력전자학회 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.4

This paper discusses the design of a novel synchronous reference frame (SRF) method that can extract the reference compensating current for single-phase shunt active power filters (APFs). Unlike previous SRF studies, the proposed method has an innovative feature that does not require a fictitious current signal. Other key features of the proposed strategy include frequency-independent operation, accurate reference current extraction, and relatively fast transient response. The effectiveness of the proposed method is investigated by conducting a detailed mathematical analysis. Results of the analysis confirm the superior performance of the suggested approach. Theoretical evaluations are confirmed by the experimental results.

Social Determinants of Health and 5-year Survival of Colorectal Cancer

Heidarnia, Mohammad Ali,Monfared, Esmat Davoudi,Akbari, Mohammad Esmail,Yavari, Parvin,Amanpour, Farzaneh,Mohseni, Maryam Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.9

Background: Early in the 21st century, cancers are the second cause of death worldwide. Colon cancer is third most common cancer and one of the few amenable to early diagnosis and treatment. Evaluation of factors affecting this cancer is important to increase survival time. Some of these factors affecting all diseases including cancer are social determinants of health. According to the importance of this disease and relation with these factors, this study was conducted to assess the relationship between social determinants of health and colon cancer survival. Materials and Methods: This was a cross-sectional, descriptive study for patients with colon cancer registered in the Cancer Research Center of Shahid Beheshti University of Medical Science, from April 2005 to November 2006, performed using questionnaires filled by telephone interview with patients (if patients had died, with family members). Data was analyzed with SPSS software (version 19) for descriptive analysis and STATA software for survival analysis including log rank test and three step Cox Proportional Hazard regression. Results: Five hundred fifty nine patients with ages ranging from 23 to 88 years with mean${\pm}$standard deviation of $63{\pm}11.8$ years were included in the study. The five year survival was 68.3%( 387 patients were alive and 172 patients were dead by the end of the study). The Cox proportional hazard regression showed 5-year survival was related to age (HR=0.53, p=0.042 for>50 years versus<50 years old) in first step, gender (HR=0.60, p=0.006 for female versus male) in second step, job (HR=1.7, p=0.001 for manual versus non manual jobs), region of residency (HR=3.49, p=0.018 for west versus south regions), parents in childhood (HR=2.87, p=0.012 for having both parents versus not having), anatomical cancer location (HR=2.16, p<0.033 for colon versus rectal cancer) and complete treatment (HR=5.96, p<0.001 for incomplete versus complete treatment). Conclusions: Social determinants of health such as job, city region residency and having parents during childhood have significant effects in 5-year survival of colon cancer and it may be better to consider these factors in addition to developing cancer treatment and to focus on these determinants of health in long-time planning.

Mono Mn(II)-substituted phosphotungstate@modified graphene oxide as a high-performance nanocatalyst for oxidative demercaptanization of gasoline

Mohammad Ali Rezvani,Zahra Shokri Aghbolagh,Hassan Hosseini Monfared,Sahar Khandan 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.52 No.-

In this study, the removal of hazardous sulfur compounds from gasoline was provided based on catalyticoxidation demercaptanization technique. The cesium salt of mono Mn(II)-substituted Keggin-typepolyoxometalate Cs5PMnW11O39 (PMnW11) was successfully synthesized and immobilized on modifiedgraphene oxide (mGO) as a new nanocatalyst (PMnW11@mGO) for demercaptanization process. Thesynthesized materials were characterized by powder X-ray diffraction (XRD), scanning electronmicroscopy (SEM), ultraviolet–visible (UV–vis), Fourier transform infrared spectroscopy (FT-IR), andcyclic voltammetry (CV) analysis. Characterization of the prepared nanocomposite was confirmed thatthe structures of the PMnW11 and mGO were retained after immobilization. The sulfur-containingmolecules in real gasoline and simulated fuel were oxidized and extracted efficiently under mild reactioncondition. After treatment, the mercaptans and total sulfur content of real gasoline were lowered with98.8% and 98% yield, respectively. The PMnW11@mGO hybrid nanocatalyst was separated and reusedconveniently at the end of the reaction forfive times. The excellent performance of this new catalyticoxidation system can be a promising rout to achieve ultra-clean gasoline.

The effect of physical activity intervention on blood pressure in 18 low and middle-income countries: a systematic review and meta-analysis of randomized controlled trials

Monfared Vahid,Hashemi Mohtaram,Kiani Fatemeh,Javid Reyhane,Yousefi Mahsa,Hasani Mahdis,Jafari Ali,Vakili Mohammad Ali,Hasani Motahareh 대한고혈압학회 2024 Clinical Hypertension Vol.30 No.-

Background In especially, low and middle-income nations (LMICs), where healthcare access may be restricted, high blood pressure (BP) is a major risk factor for cardiovascular disease and stroke, both of which can even lead to death. Altering one’s lifestyle, in conjunction with medical therapy, has been demonstrated to be efective in lowering BP. Recent research has shown that physical activity (PA), in a variety of guises and to varying degrees, can be an efective means of lowering BP. Objective The purpose of this meta-analysis and systematic review was to evaluate the impact that PA plays in the development of hypertension in LMICs nations. Methods An exhaustive search of the available research was carried out in order to locate studies that were pertinent. We searched a number of online databases, such as SCOPUS, Medline, and Web of Science, looking for clinical trials that were published before March of 2023. Studies were only considered for inclusion if they were randomized controlled trials (RCTs), reported on the association between PA and BP, and were carried out in LMICs countries. Results This meta-analysis incorporated a comprehensive collection of 60 studies, encompassing a total of 11,002 people, consisting of 5,630 cases and 5372 controls. The fndings indicate that engaging in PA had a notable impact on decreasing systolic blood pressure (SBP), as seen by a weighted mean diference (WMD) of -7.70 mmHg, with a 95% confdence interval (CI) ranging from -9.50 to -5.91 (p<0.001). Additionally, PA was found to have a signifcant infuence on reducing diastolic blood pressure (DBP), as indicated by a WMD of -3.60 mmHg, with a 95% CI ranging from -4.48to -2.73(p<0.001). The fndings from subgroup analysis indicate that the observed results remained statistically signifcant when considering individuals with baseline SBP of 120 mmHg or lower and DBP of 80 mmHg or lower. Conclusion The incorporation of PA can signifcantly contribute to the mitigation of high BP within LMICs nations. Additional investigation is required to ascertain the most efective form and amount of PA in order to mitigate BP levels within these specifc individuals.

Application of Cox and Parametric Survival Models to Assess Social Determinants of Health Affecting Three-Year Survival of Breast Cancer Patients

Mohseny, Maryam,Amanpour, Farzaneh,Mosavi-Jarrahi, Alireza,Jafari, Hossein,Moradi-Joo, Mohammad,Monfared, Esmat Davoudi Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.no.sup3

Breast cancer is one of the most common causes of cancer mortality in Iran. Social determinants of health are among the key factors affecting the pathogenesis of diseases. This cross-sectional study aimed to determine the social determinants of breast cancer survival time with parametric and semi-parametric regression models. It was conducted on male and female patients diagnosed with breast cancer presenting to the Cancer Research Center of Shohada-E-Tajrish Hospital from 2006 to 2010. The Cox proportional hazard model and parametric models including the Weibull, log normal and log-logistic models were applied to determine the social determinants of survival time of breast cancer patients. The Akaike information criterion (AIC) was used to assess the best fit. Statistical analysis was performed with STATA (version 11) software. This study was performed on 797 breast cancer patients, aged 25-93 years with a mean age of 54.7 (${\pm}11.9$) years. In both semi-parametric and parametric models, the three-year survival was related to level of education and municipal district of residence (P<0.05). The AIC suggested that log normal distribution was the best fit for the three-year survival time of breast cancer patients. Social determinants of health such as level of education and municipal district of residence affect the survival of breast cancer cases. Future studies must focus on the effect of childhood social class on the survival times of cancers, which have hitherto only been paid limited attention.