This paper treats the stability of two superposed gravitating streams rotating about the axis transverse to the horizontal magnetic field. The critical wave number for instability is found to be affected by rotation for propagation perpendicular to the axis about which the system rotates. The critical wave number for instability is not affected by rotation when waves propagate along the axis of rotation. The critical wave number is affected by both the magnetic field and the streaming velocity in both cases. Both the magnetic field and the rotation are stabilizing, while the streaming velocity is destabilizing.
Background: Women of reproductive age have important responsibilities such as pregnancy, breastfeeding, and children raising. This study aimed at surveying the effect of educational interventions, based on the health belief model (HBM), in the prevention of self-medication (SM) in women of reproductive age. Methods: This quasi-experimental study was performed on women of reproductive age in Jahrom in 2019 (January-September). Simple multi-stage random sampling was used to select the participants, and the sample size was determined 60 people for both intervention and control groups. Data collection tool was a questionnaire including demographic information and HBM construct questions. The questionnaire was completed in person by both groups before and three months after the educational intervention. The educational intervention was performed based on the HBM in the intervention group, including holding 4 educational sessions each lasting 60 minutes. The data were analyzed by SPSS 21 software using the chi-square test, paired t test, and independent t-test. Results: The results showed a significant difference between intervention and control groups in terms of knowledge, perceived severity, benefits, and barriers, as well as cues to action on the correct use of drugs after the intervention (P<0.05). Three months after the intervention, the practice mean of women in the intervention group was significantly decreased compared with the control group (P<0.001). Conclusion: Overall, educational intervention based on HBM was effective in preventing SM, but the extent of this effect varied for different HBM constructs. Nonetheless, measuring the effectiveness of the intervention based on the HBM in preventing SM behaviors requires studies with a long follow-up period.
Human being has been always thinking to apply renewable energy due to limited resources of energy. Therefore, alternative fuels have been chosen based on the following characteristics: environmental sustainability, being competitive with fossil fuels, technical justification, and easy production. In this research, various biodiesel production processes are simulated and technically analyzed using Aspen HYSYS. Then, the related flowsheets have been economically analyzed by Aspen Capital Cost Estimator (Icarus). Finally, the present net values have also been estimated by means of parameters such as the cost and sale values of vegetable oils, glycerol, NA 3 PO 4 , H 3 PO 4, and biodiesel based on the interest rates. Considering these analyses, prediction procedures, equations of capital cost estimation, and net present value were developed. According to the analysis, the use of palm oils is more appropriate than other oils for biodiesel production because its ROR (36.01%) is higher than soybean oil (27.64%) and olive oil (3.39%). According to the calculated ROR values, palm oil and soybean oil have scored the highest rate of return, respectively.
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