Multi-objective Optimization of Energy Consumption in Microgrids Considering CHPs and Renewables Using Improved Shuffled Frog Leaping Algorithm

Momen Shirin,Nikoukar Javad,Gandomkar Majid 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.3

In this paper, a consistent framework to optimize the energy consumption in microgrids (MGs) with the presence of Distributed Energy Resources (DERs) such as Wind Turbines, Photo-Voltaic arrays, Combined Heat and Power, Fuel Cell, Boiler and Batteries is presented, in which battery owners can use them both in battery to grid and grid to battery (G2V). Since the time of use electricity tariff is higher than charging rate pricing, the batteries are due to discharge their energy to the loads and otherwise, the DERs such will supply the batteries and the rest of demands. The load uncertainties and renewable energy probability of production modeled with different probability densities through Beta, Weibull distribution functions with suitable coefficients and information gap decision theory, are going to be modeled and solved using the Improved Shuffled Frog Leaping Algorithm (ISFLA). In this way, the best sets of distributed energy resources in MGs are chosen. The results comparison of the proposed method with the existing methods has verified the superiority of ISFLA method to solve this optimization problem in IEEE 33 and 69 bus test systems.

Achene wall anatomy and surface sculpturing of Launaea Cass. (Compositae: Cichorieae) with notes on their systematic significance

Momen Mustafa Zareh,Ahmed Mohamed Faried,Mona Hassan Mohamed 한국식물분류학회 2016 식물 분류학회지 Vol.46 No.2

This is the first study to deal in-depth with the achene ultra-structure of the genus Launaea Cass. in Egypt. It focuses on 12 taxa belonging to 10 species of this genus. The achene wall anatomy and surface sculpturing of those taxa were studied using scanning electron microscopy (SEM). Important aspects of the investigated taxa based on the achene characters as well as SEM micrographs of the achene surface and anatomical sections are given. Main and secondary costa of the inner achenes are used for easy differentiation between L. intybacea and L. massauensis

Characterization of anodic biofilm bacterial communities and performance evaluation of a mediator-free microbial fuel cell

Momen Salah Kamel,Mohamed Hemida Abd-Alla,Usama M. Abdul-Raouf 대한환경공학회 2020 Environmental Engineering Research Vol.25 No.6

This study investigated the bioelectrical performance of a single-chamber microbial fuel cell (SCMFC) fueled with acetate as the electron donor and inoculated with municipal solid waste rejected fractions (MSWRFs) as a microbial inoculum. The molecular characterization of the bacterial community structures of the anodic biofilm was conducted based on 16s RNA gene sequencing. The results indicated that the highest open-circuit voltage (OCV) was 797 mV and the system had a maximum power density of 134.5 mW/m² at a stable current density of 328 mA/m². The microbial fuel cell’s (MFC) columbic efficiency (CE) was 55% at a maximum substrate degradation rate of about 86.6% based on COD removal efficiency. The molecular analysis of the anodic bacterial isolates indicated that the phylogenetic bacterial mixture was dominated by seven strains with similarity percentage above 99% for each strain: Enterococcus faecalis, Clostridium butyricum, Bacillus sp., Bacillus subterranous, Enterobacter celoaca, Klebsiella pneumonia, and Escherichia coli. These results suggested that MSWRFs bacterial consortia have a moderate symbiotic structure as indicated by electrons release in parallel with substrate decomposition.

Relationship between liver iron concentration determined by R2-MRI, serum ferritin, and liver enzymes in patients with thalassemia intermedia

Hayder Al-Momen,Shaymaa Kadhim Jasim,Qays Ahmed Hassan,Hayder Hussein Ali 대한혈액학회 2018 Blood Research Vol.53 No.4

BackgroundIron overload is a risk factor affecting all patients with thalassemia intermedia (TI). We aimed to determine whether there is a relationship of serum ferritin (SF) and alanine ami-notransferase (ALT) with liver iron concentration (LIC) determined by R2 magnetic reso-nance imaging (R2-MRI), to estimate the most relevant degree of iron overload and best time to chelate in patients with TI.MethodsIn this cross-sectional study, 119 patients with TI (mean age years) were randomly se-lected and compared with 120 patients who had a diagnosis of thalassemia major (TM). Correlations of LIC, as determined by R2-MRI, with SF and ALT levels, were assessed in all participants. A P-value <0.05 was considered statistically significant. ResultsSF and LIC levels were lower in patients with TI than in those with TM; only ferritin values were significant. We found a statistically significant relationship between SF and LIC, with cut-off estimates of SF in patients with TI who had splenectomy and those who entered puberty spontaneously (916 and 940 ng/mL, respectively) with LIC >5 mg Fe/g dry weight (P<0.0001). A significant relationship was also found for patients with TI who had ele-vated ALT level (63.5 U/L), of 3.15 times the upper normal laboratory limit, using a cut-off for LIC ≥5 mg Fe/g dry weight.ConclusionWe determined the cut-off values for ALT and SF indicating the best time to start iron chela-tion therapy in patients with TI, and found significant correlations among iron overload, SF, and ALT.

An epidemiological analysis of acute flaccid paralysis in Khuzestan Province, southwest Iran, from 2006 to 2010

Ali Akbar Momen,Abdolhussein Shakurnia 한국역학회 2016 Epidemiology and Health Vol.38 No.-

OBJECTIVES: Investigations into the epidemiology of acute flaccid paralysis (AFP) are an essential strategic component of the Global Poliomyelitis Eradication Initiative of the World Health Organization (WHO), and are part of the certification process for polio eradication worldwide. This is an epidemiological report of AFP incidence in children less than 15 years old in southwest Iran. METHODS: This was a retrospective cohort study, carried out based on WHO guidelines, in which we reviewed non-polio AFP cases recorded from January 2006 to December 2010 in different regions of Khuzestan Province, southwest Iran. In this study, the records of all children under 15 years old with AFP were evaluated. RESULTS: During a 5-year period, 137 cases of AFP were reported (incidence rate, 2.21 per 100,000 children <15 years old). More than 50% (73 of 137) of the cases were boys, and 52.6% (72 of 137) were under 5 years of age, with a mean age of 5.39±3.98 years. The incidence of AFP was significantly higher in older children (p=0.001). The most common cause of paralysis was Guillain-Barré syndrome (117 of 137). None of the cases were diagnosed with acute poliomyelitis. CONCLUSIONS: In this study, we found that the incidence rate of AFP in the region was almost in agreement with the expected incidence of AFP in children less than 15 years old; therefore, the AFP surveillance program in Khuzestan Province is satisfactory in terms of reliability and effectiveness. Nevertheless, routine vaccination against polio and ensuring that patients with AFP receive follow-up are essential for eradicating polio.

The Relationship Between Serum 25 Hydroxy Vitamin D Levels and Asthma in Children

Soheila Alyasin,Tooba Momen,Sara Kashef,Abbass Alipour,Reza Amin 대한천식알레르기학회 2011 Allergy, Asthma & Immunology Research Vol.3 No.4

Purpose: Asthma and other allergic disorders have increased over the past decades in nearly all nations. Many studies have suggested the role of vitamin D deficiency in both T-helper1 and T-helper2 diseases; however, the association between vitamin D, allergy, and asthma remains uncertain. In this study, the associations of 25-hydroxy vitamin D3 levels with asthma and with the severity of asthma were evaluated. Methods: This cross-sectional study was conducted on 50 asthmatic children and 50 healthy controls aged 6–18 years. Serum 25-hydroxy vitamin D3 levels were determined and compared between the two groups. The relationship between serum vitamin D levels and pulmonary function test outcomes and eosinophil counts were examined in asthmatic patients. Results: Univariate analysis of the relationship between asthma and vitamin D showed that decreased vitamin D levels were associated with significantly increased odds of asthmatic state (P=0.002). In a multivariate analysis after adjustment for age, body mass index, and sex, the relationship between vitamin D and asthma increased. In asthmatic patients, 25-hydroxy vitamin D levels had direct and significant correlations with both predicted FEV1 (R2=0.318; P=0.024) and FEV1/FVC (R2=0.315; P=0.026). There were no associations between vitamin D level and eosinophil counts, duration of disease, and the number of hospitalization or unscheduled visits in the previous year (P>0.05). Conclusions: These results showed that serum 25-hydroxy vitamin D levels were inversely associated with asthma, and there was a direct and significant relationship between vitamin D levels and pulmonary function test outcomes in asthmatic children. An interventional study in asthmatic patients with low serum vitamin D concentration may establish a causal relationship between asthma and vitamin D.

Effects of excessive tea consumption on pregnancy weight gain and neonatal birth weight

( Shaymaa Kadhim Jasim ),( Hayder Al-momen ),( Ali Kadhim Alqurishi ) 대한산부인과학회 2021 Obstetrics & Gynecology Science Vol.64 No.1

Objective Tea lovers are increasing worldwide. We hope that this report is the first to discuss the possible impacts of high black tea consumption on gestational weight gain (GWG) and birth parameters. Methods Throughout one year, a total of 7,063 pregnant ladies coming for first antenatal visit were screened in a major tertiary center. Of them, 1,138 were involved and divided according to their preference into 3 groups: excessive tea (ET), usual tea (UT), and mixed beverages group. The study included women who gave birth to healthy neonates. Results The rate of ET consumption was 4.13% with a total of 41 cases. The UT group (controls) comprised 94 women. ET was significantly associated (P<0.05) with maternal age, parity, occupation, smoking, and poor GWG starting from 30 weeks’ gestation until delivery, low birth weight, and small for gestational age (SGA). Poor GWG had a higher relative risk (with 95% confidence interval) in the ET group than in the UT group in crude (1.84 [0.85-2.43]) and risk adjusted models (1.25 [0.28-2.26]). Further, similar results were obtained for SGA in the crude and 3 adjusted models, where the first model was adjusted for bio-obstetrical variables, the second for social parameters, and the third for all factors included in the previous models (1.53 [0.62-2.81], 1.52 [0.71-2.50], and 1.46 [0.78-2.39]), respectively. Conclusion Consumption of large amounts of daily black tea during pregnancy (≥1,500 mL) is a significant cause of poor GWG and SGA.

Carbon-Nanotube-Embedded Hydrogel Sheets for Engineering Cardiac Constructs and Bioactuators

Shin, Su Ryon,Jung, Sung Mi,Zalabany, Momen,Kim, Keekyoung,Zorlutuna, Pinar,Kim, Sang bok,Nikkhah, Mehdi,Khabiry, Masoud,Azize, Mohamed,Kong, Jing,Wan, Kai-tak,Palacios, Tomas,Dokmeci, Mehmet R.,Bae, American Chemical Society 2013 ACS NANO Vol.7 No.3

<P>We engineered functional cardiac patches by seeding neonatal rat cardiomyocytes onto carbon nanotube (CNT)-incorporated photo-cross-linkable gelatin methacrylate (GelMA) hydrogels. The resulting cardiac constructs showed excellent mechanical integrity and advanced electrophysiological functions. Specifically, myocardial tissues cultured on 50 μm thick CNT-GelMA showed 3 times higher spontaneous synchronous beating rates and 85% lower excitation threshold, compared to those cultured on pristine GelMA hydrogels. Our results indicate that the electrically conductive and nanofibrous networks formed by CNTs within a porous gelatin framework are the key characteristics of CNT-GelMA leading to improved cardiac cell adhesion, organization, and cell–cell coupling. Centimeter-scale patches were released from glass substrates to form 3D biohybrid actuators, which showed controllable linear cyclic contraction/extension, pumping, and swimming actuations. In addition, we demonstrate for the first time that cardiac tissues cultured on CNT-GelMA resist damage by a model cardiac inhibitor as well as a cytotoxic compound. Therefore, incorporation of CNTs into gelatin, and potentially other biomaterials, could be useful in creating multifunctional cardiac scaffolds for both therapeutic purposes and <I>in vitro</I> studies. These hybrid materials could also be used for neuron and other muscle cells to create tissue constructs with improved organization, electroactivity, and mechanical integrity.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2013/ancac3.2013.7.issue-3/nn305559j/production/images/medium/nn-2012-05559j_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn305559j'>ACS Electronic Supporting Info</A></P>

Exploring Staphylococcus aureus Virulence Factors; Special Emphasis on Staphyloxanthin

( Fatma Al-zahraa A. Yehia ),( Nehal Yousef ),( Momen Askoura ) 한국미생물 · 생명공학회 2021 한국미생물·생명공학회지 Vol.49 No.4

Staphylococcus aureus is a well-known pathogen that can cause diseases in humans. It can cause both mild superficial skin infections and serious deep tissue infections, including pneumonia, osteomyelitis, and infective endocarditis. To establish host infection, S. aureus manages a complex regulatory network to control virulence factor production in both temporal and host locations. Among these virulence factors, staphyloxanthin, a carotenoid pigment, has been shown to play a leading role in S. aureus pathogenesis. In addition, staphyloxanthin provides integrity to the bacterial cell membrane and limits host oxidative defense mechanisms. The overwhelming rise of Staphylococcus resistance to routinely used antibiotics has necessitated the development of novel anti-virulence agents to overcome this resistance. This review presents an overview of the chief virulence determinants in S. aureus. More attention will be paid to staphyloxanthin, which could be a possible target for anti-virulence agents.

Evaluation of Climate Change Adaptation Options for Agricultural Systems

Taras Lychuk,Robert Hill,Roberto Izaurralde,Bahram Momen,Allison Thomson 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6