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Designing Robust Pole Placement Control For Roll Motions Of Ships via LMIs
Elham Amini Boroujeni,Abdolkarim Daryabor,Hamid Reza Momeni 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
This paper addresses the problem of robust pole placement control of nonlinear systems having multiple equilibrium points and low order dynamics (Roll Motion Of Ships) via a dynamic output feedback in which the controller has dynamic states. The design technique is described using linear matrix inequalities (LMIs).pole placement by using LMIs places the close loop poles in appropriate region to have the best response by considering a tradeoff between overshoot of the response, settling time and steady state error. The effectiveness of the proposed technique in control of Roll Motion of Ships is illustrated by simulation results.
Adaptive Sliding Mode Control For Roll Motions Of Ships
Elham Amini Boroujeni,Hamid Reza Momeni 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
This paper is concerned with the problem of adaptive sliding mode control for roll motions of ships as an uncertain nonlinear system with five equilibrium points which faces external disturbance .The purpose is designing a robust controller for this model with these properties, under the influence of external sinusoidal disturbances. The capabilities of the proposed controller are verified by the simulation results.
( Elham Bazshahi ),( Sanaz Pourreza ),( Mahtab Ghanbari ),( Zeinab Khademi ),( Mohammad Reza Amini ),( Kurosh Djafarian ),( Sakineh Shab-bidar ) 한국임상영양학회 2021 Clinical Nutrition Research Vol.10 No.2
There is a growing body of evidence linking vitamin D and its antiadipogenic activity with body composition. The aim of this study was to investigate the association between vitamin D levels, visceral adiposity index (VAI), and lipid accumulation product index among a group of Iranian people. This cross-sectional study was conducted with 270 Iranian adults. Body composition was measured via bio-impedance analysis. The 25-hydroxyvitamin D [25(OH)D] was also measured using the enzyme-linked immunosorbent assay method. The VAI and lipid accumulation product index were calculated. Multiple linear and logistic regression after controlling for confounder was used to report the results. Multiple linear regression showed that serum 25(OH)D levels were positively correlated with age (crude: β ± standard error [SE] = 0.23 ± 0.06, p ≤ 0.001; model I: β ± SE = 0.18 ± 0.05, p = 0.002) and percent body fat (crude: β ± SE = 0.10 ± 0.04, p = 0.02). Binary logistic regression analysis showed a higher chance of greater percent body fat and lipid accumulation product index in the crude model (odds ratio [OR], 2.05; 95% confidence interval [CI], 1.13-3.72 for percent body fat and OR, 2.07; 95% CI, 1.14-3.76 for lipid accumulation product index), which disappeared after adjusting for covariates. Adults with higher vitamin D levels had higher scores of percent body fat and lipid accumulation product index. More longitudinal studies are needed to confirm these results.
( Masumeh Ghazanfarpour ),( Elham Amini ),( Talat Khadivzadeh ),( Masoudeh Babakhanian ),( Bahareh Nouri ),( Hassan Rakhshandeh ),( Maliheh Afiat ) 대한폐경학회 2017 대한폐경학회지 Vol.23 No.2
Objectives: The goal of this study is to assess the effect of fennel on bone density. Methods: This was a double-blind, randomized, placebo-controlled trial, which studied sixty eligible postmenopausal women, who were randomly assigned to fennel and placebo groups. Then, the dual energy X-ray absorptiometry was utilized to measure bone mineral density (BMD) and bone mineral content (BMC) of the spine, femoral neck, intertrochanter, and trochanter at the baseline and after three-month follow-up. Results: The mean BMD and BMC at lumbar spine (P = 0.14, P = 0.504), total hip femoral (P = 0.427, P = 0.471), trochanter (P = 0.075, P = 0.07), intertrochanter, (P = 0.864, P = 0.932) and femoral neck (P = 0.439, P = 0.641) was not significantly different between the fennel and placebo groups. Conclusions: The results of this study did not approve the effect of fennel on bone density in post-menopausal women. However, to gain deeper insights, further studies with longer durations and larger sample sizes are recommended. (J Menopausal Med 2017;23:124-130)
( Maliheh Afiat ),( Elham Amini ),( Masumeh Ghazanfarpour ),( Bahareh Nouri ),( Mahsa Sadat Mousavi ),( Masoudeh Babakhanian ),( Hassan Rakhshandeh ) 대한폐경학회 2018 대한폐경학회지 Vol.24 No.1
Objectives: The present trial aimed to assess the effects of Fennel (Foeniculum vulgare Mill.) on lipid profiles. Methods: In this double blind, randomized and placebo-controlled trial, sixty eligible postmenopausal women were randomly assigned into the fennel and placebo groups. Total blood cholesterol, cholesterol fractions, and triglycerides were tested at the baseline, and after three-month follow-up. Results: There was no significant difference in triglyceride (P = 0.679), total cholesterol (P = 0.103), low-density lipoprotein cholesterol (LDL-C; P = 0.146) and high-density lipoprotein cholesterol (HDL-C; P = 0.266) levels between the two groups. In addition, in both groups, a paired t-test showed no significant difference in all mentioned parameters, except for HDL-C, indicating significant borderline improvement (P = 0.052) in the fennel group. Conclusions: The fennel group revealed a very slight positive change in LDL-C, triglyceride and HDL-C. Further studies with longer durations, higher doses, and larger sample sizes are recommended to validate the results. (J Menopausal Med 2018;24:29-33)
Mohammad Reza Amini,Fatemeh Sheikhhossein,Alireza Talebyan,Elham Bazshahi,Farhang Djafari,Azita Hekmatdoost 한국임상영양학회 2022 Clinical Nutrition Research Vol.11 No.3
Studies examining the effect of artichoke on liver enzymes have reported inconsistent results. This systematic review and meta-analysis aimed to assess the effects of artichoke administration on the liver enzymes. PubMed, Embase, the Cochrane Library, and Scopus databases were searched for articles published up to January 2022. Standardized mean difference (Hedges’ g) were analyzed using a random-effects model. Heterogeneity, publication bias, and sensitivity analysis were assessed for the liver enzymes. Pooled analysis of seven randomized controlled trials (RCTs) suggested that the artichoke administration has an effect on both alanine aminotransferase (ALT) (Hedges’ g, −1.08; 95% confidence interval [CI], −1.76 to −0.40; p = 0.002), and aspartate aminotransferase (AST) (Hedges’ g, −1.02; 95% CI, −1.76 to −0.28; p = 0.007). Greater effects on ALT were detected in trials that lasted ≤8 weeks. Also, greater effects on AST were detected in trials using > 500 mg artichoke. Overall, this meta-analysis demonstrated artichoke supplementation decreased ALT and AST.
Association of Nutrient Patterns with Metabolic Syndrome and Its Components in Iranian Adults
( Zahra Akbarzade ),( Mohammad Reza Amini ),( Farhang Djafari ),( Habib Yarizadeh ),( Fatemeh Mohtashaminia ),( Maryam Majdi ),( Elham Bazshahi ),( Kurosh Djafarian ),( Cain C. T. Clark ),( Sakineh Sh 한국임상영양학회 2020 Clinical Nutrition Research Vol.9 No.4
We aimed to examine the association between nutrient patterns and metabolic syndrome (MetS) in Iranian adults. In a cross-sectional study of 850 self-certified healthy women and men aged 20-59 years old, dietary data were assessed using three 24-hour recall. Anthropometric measures were done and blood samples were collected to measure serum fasting serum glucose and lipid profile. The MetS was defined using the International Diabetes Federation. Major nutrient patterns were identified using principle competent analysis. In the first nutrient pattern, the individuals in the fifth quintile had a higher intake of vitamins B1, B2, B3, B5, B6, B12, zinc, iron, saturated fatty acids (SFAs), and protein. In the second nutrient pattern, individuals in the first quintile had lower consumption of zinc, SFAs, vitamin E, α-tocopherol, oleic acid, polyunsaturated fatty acids, β-carotene, linolenic acid, and monounsaturated fatty acids, compared to the fifth quintile. Furthermore, in the third nutrient pattern, the individuals in the fifth quintile had a higher intake of potassium, magnesium, phosphorous, calcium, protein, carbohydrate, vitamin C, and folate compared to other quintiles. We identified the second pattern had an indirect association with systolic and diastolic blood pressure, triglycerides, fasting blood sugar (p < 0.001 for all), and total cholesterol (p = 0.04) when it was controlled for body weight. Our findings showed that nutrient patterns may have an association with MetS components with mediating body weight.