Coactivity of Mast Cells and Stem Cells on Angiogenesis and Antioxidants’ Potentials at Inflammation, Proliferation, and Tissue Remodeling Phases of Wound

Mahshad Mousavi,Ahmad Khanifar,Nazanin Mousavi,Khatereh Anbari,Farzaneh Chehelcheraghi 대한성형외과학회 2022 Archives of Plastic Surgery Vol.49 No.3

Background Reactive oxygen species cause serious damage to the physiological function of tissues. Determination of total antioxidant capacity of skin tissue is one of the determinants of damaged tissue function.Mast cells (MCs) are one of the groups of cells that are invited to the site of injury. The healing process begins with the rapid release of various types of MCs’ intermediate factors at the site of injury. Bone marrow mesenchymal stem cell (BMMSC) production and secretion have been shown to regenerate the skin. The aim of this research was to evaluate the wound-healing and antioxidant effects of BMMSCs per MCs. Methods Fifty-four albino Wistar male rats were divided into three groups: (1) nonsurgery, (2) surgery, and (3) surgeryþBMMSCs. Groups 2 and 3 were operated with a 38 cmflap and in group 3, cell injections (7109 cell injection at the time of surgery) were performed. After days 4, 7, and 15, percentage of the surviving tissue, histological characteristics, superoxide dismutase (SOD) activity, and amount of malondialdehyde (MDA) were measured in the groups. For results, Graph Pad Prism 8 software was used, and data were analyzed and compared by analysis of variance and Tukey test. Results BMMSCs’ application decreased the amount of MDA, increased SOD activity and survival rate of the flaps, and improved the histological characteristics. Conclusion This study revealed the protective effects BMMSCs alongsideMCs against oxidative stress on the survival of the flaps. However, for clinical use, more research is needed to determine its benefits.

Shape-controlled synthesis of zinc nanostructures mediating macromolecules for biomedical applications

Seyyed Mojtaba Mousavi,Gity Behbudi,Ahmad Gholami,Seyyed Alireza Hashemi,Zohre Mousavi Nejad,Sonia Bahrani,Wei-Hung Chiang,Lai Chin Wei,Navid Omidifar 한국생체재료학회 2022 생체재료학회지 Vol.26 No.1

Zinc nanostructures (ZnONSs) have attracted much attention due to their morphological, physicochemical, and electrical properties, which were entailed for various biomedical applications such as cancer and diabetes treatment, anti-inflammatory activity, drug delivery. ZnONS play an important role in inducing cellular apoptosis, triggering excess reactive oxygen species (ROS) production, and releasing zinc ions due to their inherent nature and specific shape. Therefore, several new synthetic organometallic method has been developed to prepare ZnO crystalline nanostructures with controlled size and shape. Zinc oxide nanostructures’ crystal size and shape can be controlled by simply changing the physical synthesis condition such as microwave irradiation time, reaction temperature, and TEA concentration at reflux. Physicochemical properties which are determined by the shape and size of ZnO nanostructures, directly affect their biological applications. These nanostructures can decompose the cell membrane and accumulate in the cytoplasm, which leads to apoptosis or cell death. In this study, we reviewed the various synthesis methods which affect the nano shapes of zinc particles, and physicochemical properties of zinc nanostructures that determined the shape of zinc nanomaterials. Also, we mentioned some macromolecules that controlled their physicochemical properties in a green and biological approaches. In addition, we present the recent progress of ZnONSs in the biomedical fields, which will help centralize biomedical fields and assist their future research development.

Modeling of compressive strength of HPC mixes using a combined algorithm of genetic programming and orthogonal least squares

Mousavi, S.M.,Gandomi, A.H.,Alavi, A.H.,Vesalimahmood, M. Techno-Press 2010 Structural Engineering and Mechanics, An Int'l Jou Vol.36 No.2

In this study, a hybrid search algorithm combining genetic programming with orthogonal least squares (GP/OLS) is utilized to generate prediction models for compressive strength of high performance concrete (HPC) mixes. The GP/OLS models are developed based on a comprehensive database containing 1133 experimental test results obtained from previously published papers. A multiple least squares regression (LSR) analysis is performed to benchmark the GP/OLS models. A subsequent parametric study is carried out to verify the validity of the models. The results indicate that the proposed models are effectively capable of evaluating the compressive strength of HPC mixes. The derived formulas are very simple, straightforward and provide an analysis tool accessible to practicing engineers.

The Design and Construction of a High Efficiency Satellite Electrical Power Supply System

Mousavi, Navid The Korean Institute of Power Electronics 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.2

In this paper, a high efficiency satellite electrical power supply system is proposed. The increased efficiency of the power supply system allows for downscaling of the solar array and battery weight, which are among the most important satellite design considerations. The satellite power supply system comprises two units, namely a generation unit and a storage unit. To increase the efficiency of the solar array, a maximum power point tracker (MPPT) is used in the power generation unit. In order to improve the MPPT performance, a novel algorithm is proposed on the basis of the hill climbing method. This method can track the main peak of the array power curve in satellites with long duration missions under unpredicted circumstances such as a part of the array being damaged or the presence of a shadow. A lithium-ion battery is utilized in the storage unit. An algorithm for calculating the optimal rate of battery charging is proposed where the battery is charged with the maximum possible efficiency considering the situation of the satellite. The proposed system is designed and manufactured. In addition, it is compared to the conventional power supply systems in similar satellites. Results show a 12% increase in the overall efficiency of the power supply system when compared to the conventional method.

Prevalence and Determinants of Catastrophic Healthcare Expenditures in Iran From 2013 to 2019

mousavi Abdoreza,lotfi Farhad,Alipour Samira,Fazaeli Aliakbar,Bayati Mohsen 대한예방의학회 2024 예방의학회지 Vol.57 No.1

Objectives: Protecting people against financial hardship caused by illness stands as a fundamental obligation within healthcare systems and constitutes a pivotal component in achieving universal health coverage. The objective of this study was to analyze the prevalence and determinants of catastrophic health expenditures (CHE) in Iran, over the period of 2013 to 2019.Methods: Data were obtained from 7 annual national surveys conducted between 2013 and 2019 on the income and expenditures of Iranian households. The prevalence of CHE was determined using a threshold of 40% of household capacity to pay for healthcare. A binary logistic regression model was used to identify the determinants influencing CHE.Results: The prevalence of CHE increased from 3.60% in 2013 to 3.95% in 2019. In all the years analyzed, the extent of CHE occurrence among rural populations exceeded that of urban populations. Living in an urban area, having a higher wealth index, possessing health insurance coverage, and having employed family members, an employed household head, and a literate household head are all associated with a reduced likelihood of CHE (<i>p</i><0.05). Conversely, the use of dental, outpatient, and inpatient care, and the presence of elderly members in the household, are associated with an increased probability of facing CHE (<i>p</i><0.05).Conclusions: Throughout the study period, CHE consistently exceeded the 1% threshold designated in the national development plan. Continuous monitoring of CHE and its determinants at both household and health system levels is essential for the implementation of effective strategies aimed at enhancing financial protection.

A data mining approach to compressive strength of CFRP-confined concrete cylinders

Mousavi, S.M.,Alavi, A.H.,Gandomi, A.H.,Esmaeili, M. Arab,Gandomi, M. Techno-Press 2010 Structural Engineering and Mechanics, An Int'l Jou Vol.36 No.6

In this paper, compressive strength of carbon fiber reinforced polymer (CFRP) confined concrete cylinders is formulated using a hybrid method coupling genetic programming (GP) and simulated annealing (SA), called GP/SA, and a robust variant of GP, namely multi expression programming (MEP). Straightforward GP/SA and MEP-based prediction equations are derived for the compressive strength of CFRP-wrapped concrete cylinders. The models are constructed using two sets of predictor variables. The first set comprises diameter of concrete cylinder, unconfined concrete strength, tensile strength of CFRP laminate, and total thickness of CFRP layer. The most widely used parameters of unconfined concrete strength and ultimate confinement pressure are included in the second set. The models are developed based on the experimental results obtained from the literature. To verify the applicability of the proposed models, they are employed to estimate the compressive strength of parts of test results that were not included in the modeling process. A sensitivity analysis is carried out to determine the contributions of the parameters affecting the compressive strength. For more verification, a parametric study is carried out and the trends of the results are confirmed via some previous studies. The GP/SA and MEP models are able to predict the ultimate compressive strength with an acceptable level of accuracy. The proposed models perform superior than several CFRP confinement models found in the literature. The derived models are particularly valuable for pre-design purposes.

SKEW CYCLIC CODES OVER 𝔽_p + v𝔽_p + v²𝔽_p

Mousavi, Hamed,Moussavi, Ahmad,Rahimi, Saeed Korean Mathematical Society 2018 대한수학회보 Vol.55 No.6

In this paper, we study an special type of cyclic codes called skew cyclic codes over the ring ${\mathbb{F}}_p+v{\mathbb{F}}_p+v^2{\mathbb{F}}_p$, where p is a prime number. This set of codes are the result of module (or ring) structure of the skew polynomial ring (${\mathbb{F}}_p+v{\mathbb{F}}_p+v^2{\mathbb{F}}_p$)[$x;{\theta}$] where $v^3=1$ and ${\theta}$ is an ${\mathbb{F}}_p$-automorphism such that ${\theta}(v)=v^2$. We show that when n is even, these codes are either principal or generated by two elements. The generator and parity check matrix are proposed. Some examples of linear codes with optimum Hamming distance are also provided.

Analytical solution for analyzing initial curvature effect on vibrational behavior of PM beams integrated with FGP layers based on trigonometric theories

Mousavi, S. Behnam,Amir, Saeed,Jafari, Akbar,Arshid, Ehsan Techno-Press 2021 Advances in nano research Vol.10 No.3

In the current study, the free vibrational behavior of a Porous Micro (PM) beam which is integrated with Functionally Graded Piezoelectric (FGP) layers with initial curvature is considered based on the two trigonometric shear deformation theories namely SSDBT and Tan-SDBT. The structure's mechanical properties are varied through its thicknesses following the given functions. The curved microbeam is exposed to electro-mechanical preload and also is rested on a Pasternak type of elastic foundation. Hamilton's principle is used to extract the motion equations and the MCST is used to capture the size effect. Navier's solution method is selected as an analytical method to solve the motion equations for a simply supported ends case and by validating the results for a simpler state with previously published works, effects of different important parameters on the behavior of the structure are considered. It is found that although increasing the porosity reduces the natural frequency, but enhancing the volume fraction of CNTs increasing it. Also, by increasing the central angle of the curved beam the vibrations of the structure increases. Designing and manufacturing more efficient smart structures such as sensors and actuators are of the aims of this study.

Physical Activity Plus Acceptance and Commitment Therapy Can Decrease Anxiety Symptoms and Insomnia Severity Among Individuals With Poor Sleep Quality

Mousavi Seyedeh Shadi,Molanorouzi Keyvan,Shojaei Masoumeh,Bahari Seyed Mohyeddin 대한수면학회 2023 sleep medicine research Vol.14 No.2

Background and Objective During the COVID-19 pandemic, there were increased reports of sleep problems. Individuals with poor sleep quality are at particular risk of reporting symptoms of anxiety, depression, and poor quality of life, along with substance abuse. The present study aimed to examine the effectiveness of combined physical activity and acceptance and commitment therapy (ACT) on anxiety and depressive symptoms and insomnia severity among individuals with poor sleep quality.Methods Participants were 60 males and females with mean age (standard deviation) of 39.29 (5.82) years. Participants were randomly divided into 4 groups of 1) physical activity, 2) ACT, 3) combination of physical activity and ACT, and 4) control. The study consisted of four stages: pre-test, interventions, post-test, and follow-up. Repeated measures analyses of variance were used to assess time by group interactions.Results The results showed that the symptoms of anxiety and depression and sleep problems were reduced for the physical activity, ACT, and combined groups, compared to the control group (p = 0.001). Superiority in all outcomes of the combined group was shown, compared to the other groups.Conclusions The present findings suggest that among individuals with poor sleep quality, combined physical activity and ACT intervention has the potential to reduce symptoms of anxiety and depression and insomnia severity. It further appears that health organizers should pay more attention to physical activity interventions in individuals with poor sleep quality.

Analytical solution for buckling analysis of micro sandwich hollow circular plate

Mohammad Mousavi,Mehdi Mohammadimehr,Rasoul Rostami 사단법인 한국계산역학회 2019 Computers and Concrete, An International Journal Vol.24 No.3

In this paper, the buckling of micro sandwich hollow circular plate is investigated with the consideration of the porous core and piezoelectric layer reinforced by functionally graded (FG)carbon nano-tube. For modeling the displacement field of sandwich hollow circular plate, the high-order shear deformation theory (HSDT) of plate and modified couple stress theory (MCST) are used. The governing differential equations of the system can be derived using the principle of minimum potential energy and Maxwell’s equation that for solving these equations, the Ritz method is employed. The results of this research indicate the influence of various parameters such as porous coefficients, small length scale parameter, distribution of carbon nano-tube in piezoelectric layers and temperature on critical buckling load. The purpose of this research is to show the effect of physical parameters on the critical buckling load of micro sandwich plate and then optimize these parameters to design structures with the best efficiency. The results of this research can be used for optimization of micro-structures and manufacturing different structure in aircraft and aerospace.