Numerical bifurcation analysis of double +1 multiplier in ℤ₃-symmetric maps

We consider a resonance 1:1 bifurcation with (Formula presented.)-symmetry in a discrete-time dynamical system. We employ standard normalization and center manifold reduction techniques. With this, we obtain the normal form up to cubic order and also explicit formulas for the critical normal form coefficients. We provide an implementation of our algorithm that can be used in the numerical bifurcation toolbox MATCONTM. We illustrate our analysis with a Cournot triopoly model from economics

Numerical Bifurcation Analysis of Double +1 Multiplier in Z3-Symmetric Maps

We consider a resonance 1:1 bifurcation with Z3-symmetry in a discrete-time dynamical system. We employ standard normalization and center manifold reduction techniques. With this, we obtain the normal form up to cubic order and also explicit formulas for the critical normal form coefficients. We provide an implementation of our algorithm that can be used in the numerical bifurcation toolbox matcontm. We illustrate our analysis with a Cournot triopoly model from economics

Mapping local patterns of childhood overweight and wasting in low- and middle-income countries between 2000 and 2017

A double burden of malnutrition occurs when individuals, household members or communities experience both undernutrition and overweight. Here, we show geospatial estimates of overweight and wasting prevalence among children under 5 years of age in 105 low- and middle-income countries (LMICs) from 2000 to 2017 and aggregate these to policy-relevant administrative units. Wasting decreased overall across LMICs between 2000 and 2017, from 8.4% (62.3 (55.1–70.8) million) to 6.4% (58.3 (47.6–70.7) million), but is predicted to remain above the World Health Organization’s Global Nutrition Target of <5% in over half of LMICs by 2025. Prevalence of overweight increased from 5.2% (30 (22.8–38.5) million) in 2000 to 6.0% (55.5 (44.8–67.9) million) children aged under 5 years in 2017. Areas most affected by double burden of malnutrition were located in Indonesia, Thailand, southeastern China, Botswana, Cameroon and central Nigeria. Our estimates provide a new perspective to researchers, policy makers and public health agencies in their efforts to address this global childhood syndemic

Design and psychometrics of risk assessment tool for makeshift hospitals: Focusing on pandemics

Pandemics caused a change in the health service delivery system. In disasters with massive injuries or epidemic, the capacity to admit the injured and infected patients to provide health services faces the challenges. Covid-19 virus is a respiratory disease that from its emergence until January 18, 2023, the Covid-19 virus has infected more than 672 million people worldwide. In most countries, makeshift hospital has been set up as intermediate medical centers to keep people who are likely to be carriers of the disease to control communicable diseases. Most makeshift hospitals already have alternative uses and, have changed into temporary or intermediate care centers. Based on the search of research team, any standard tools were found to assess the makeshift hospitals safety. All the safety assessment tools were related to the hospital, but since makeshift hospitals are mostly non-hospital structures, the research team has designed and validate a makeshift hospital safety assessment tool for the first time in this study.The present study is a mixed method that was conducted in 3 phases including; a document review, explaining the components affecting non-structural and functional safety of the makeshift hospital, designing makeshift hospital safety assessment tools and analyzing the results and validating it in 2022. Content validity and reliability were measured by CVR and CVI, ICC and Cronbach's alpha. In the fourth phase, with the participation of 15 specialists, managers, experts, qualitative and quantitative validity of content was done. Data were analyzed by SPSS version 21 software.The final tool contains 186 items and a 5-point Likert designed for very low safety (1), low safety (2), moderate safety (3), good safety (4), and very good safety (5). The scores of each makeshift hospital were calculated based on the items and the degree of safety. Cronbach's alpha coefficient for tool was 0.98. Retesting the questionnaire after two weeks confirmed the stability of tool (ICC = 0.98). The validity and reliability of this tool were confirmed with 186 items in 2 factors and 26 subcategories including risk of disaster, non-structural safety, safety of windows and shutters, hospital access, information and communication management, patient safety and hygiene and etc.All centers providing health services, whether temporarily or permanently, must have safety to continue their activities in disaster and maintain the safety and health of staff and inpatients. The makeshift hospital safety tool can be a suitable tool for assessing the risk and eliminating their vulnerabilities, and it can also provide important indicators for the design and set up of the makeshift hospital to policymakers and executives in the field of health

Pregnancy outcomes in women with idiopathic thrombocytopenic purpura

Background: Idiopathic thrombocytopenic purpura (ITP) is a disease that commonly affects women of reproductive age and is associated with maternal and fetal complications. Objective: The aim of the present study was to report the perinatal outcome in pregnant women with ITP. Materials and Methods: Twenty one pregnant women with ITP admitted in a teaching hospital in Tehran, from October 2008 to February 2010, were enrolled in this prospective historical cohort study; course and perinatal outcome of pregnancies were studied. Results: Seven (33.3%) cases had been diagnosed before pregnancy, while the other fourteen (66.7%) were diagnosed during pregnancy. During hospitalization, thirteen (62%) patients required treatment, eight (61.5%) of them with steroids, two (15.3%) received intravenous immunoglobulin (IVIG), and three (23%) were treated with steroids and IVIG. Three babies were delivered vaginally (14.3%), seventeen (81%) through cesarean section and one patient aborted her fetus. Nine mothers (42.9%) had platelet counts <50000/ml at the time of delivery; but postpartum hemorrhage occurred in 4 (19%) women and one women received platelet transfusion during cesarean section. Six (28.6%) women developed gestational diabetes. Pregnancy was complicated by preeclampsia in one woman and by abruptio placenta in another. One pregnancy terminated in intrauterine fetal death. Seventeen infants (89.5%) had normal platelet counts, and two (10.5%) had moderate thrombocytopenia. No infant showed signs of hemorrhage, but 2 neonates (10.5%) were diagnosed with intrauterine growth restriction. Conclusion: Rate of gestational diabetes in pregnant women with ITP is higher than the general population. Rate of gestinational diabetes is 3-5% and postpartum hemorrhage is 5-7% in general. Postpartum hemorrhage is common in these women. Severe thrombocytopenia and bleeding in the newborns are uncommon

The Effect of Exercise Training and Sex on Growth Hormone (GH) Secretion in Active Adolescents

The purpose of this research was to study growth hormone (GH) response to a session of maximal exercise in active adolescents. For this purpose, 15 subjects (8 females: age 13± 0.5 yrs, height 153.25± 3.73 cm, weight 43± 5.10 kg and 7 males: age 14± 0.5 yrs, height 166.86± 6.07 cm, weight 52.86± 5.61 kg) performed an incremental exercise protocol on a treadmill with an increasing grade until volitional exhaustion. Blood samples were collected from venous blood of the subjects before and immediately after the exercise. T-test and Pearson correlation were used to analyze the data. The results showed a significant increase in serum GH concentration after exercise in both boys and girls (P0.05). But GH response was significantly higher in girls than boys (12.39 ng/ml, 4.23 ng/ml respectively). Regression analysis revealed no significant correlation between BMI and GH responses before exercise in girls and boys. Results from the present investigation indicated an increase in GH concentration after exercise and that women had greater GH release

Removal of Fluoride Ion from Aqueous Solution by Nanocomposite Hydrogel Based on Starch/Sodium Acrylate/Nano Aluminum Oxide

Determination of fluoride in drinking water has received increasing interest, due to its beneficial and detrimental effects on health. Contamination of drinking water by fluoride can cause potential hazards to human health. In recent years, considerable attention has been given to different methods for the removal of fluoride from drinking and waste waters. The aim of this research was to investigate the effect of nano composite hydrogel based on starch/sodium acrylate/aluminum oxide in reduction of fluoride concentration in drinking water and industrial waste water. In a batch system, the dynamic and equilibrium adsorption of fluoride ions were studied with respect to changes in determining parameters such as pH, contact time, initial fluoride concentration, starch/acrylic acid weight ratio and weight percent of nano aluminum oxide. The obtained equilibrium adsorption data were fitted with Langmuir and Freundlich models, as well as the kinetic data with pseudo-first order and pseudo- second order models. The results showed that optimum pH was found to be in the range of 5 to 7. Removal efficiency of fluoride was increased with decreases in initial concentration of fluoride. Sixty percent of initial value of fluoride solution was removed by nano composite hydrogel (4 wt% of nano aluminum oxide) at 240 min (initial fluoride concentration = 5 ppm, pH 6.8 and temperature = 25ºC). Under the same condition, the equilibrium adsorption of fluoride ions was 85% and 68% for initial solution concentration of 5 and 10 ppm, respectively. Adsorption isotherm data showed that the fluoride sorption followed the Langmuir model. Kinetics of sorption of fluoride onto nano composite hydrogel was described by pseudo-first order model

The Effects of One-Stage Full-Mouth Disinfection and Qua-drant-Wise Scaling and Root Planing on Serum Levels of IL-17 and IL-1β and Clinical Parameters (A randomized Controlled Trial Study)

Objective: One-stage full-mouth disinfection technique (FMD) has been introduced to avoid cross-contamination between the treated and untreated regions between treatment sessions. Considering the role of inflammatory mediators in periodontitis, the aim of the present study was to compare the effects of FMD with the quadrant-wise scaling and root planing (Q-SRP) on serum levels of IL-17 and IL-1β in patients with moderate-to-severe chronic periodontitis.Materials and Methods: Twenty patients with chronic periodontitis were selected randomly and based on inclusion criteria in each group. In order to evaluate the periodontal status, the clinical parameters of bleeding on probing (BOP), clinical attachment level (CAL), probing depth (PD) and modified gingival index (MGI) were measured and recorded before treatment and at 2- and 4-month intervals after treatment. Immunologic parameters of the study such as IL-17 and IL-1β serum levels were determined by special laboratory kits at the same intervals. Data were analyzed by SPSS 15 statistical software. Statistical significance was defined at p<0.05.Results: The results showed a decrease in the means of IL-17 and IL-1β serum levels in both treatment modalities, with no statistically significant differences between the two study groups at the two time intervals (p>0.05). In the evaluation of periodontal parameters, all parameters exhibited clinical improvements in both groups, with no statistically significant differences between the two study groups (p>0.05).Conclusion: Based on the results of the present study it was concluded that both FMD and Q-SRP techniques result in improvements in periodontal indexes and decreases in the serum levels of IL-17 and IL-1β inflammatory mediators