Undular hydraulic jumps are characterized by a smooth rise of the free surface, followed by a train of stationary waves. These jumps sometimes occur in natural waterways and rivers. Numerical difficulties are especially distinct when the flow condition is close to the critical value because of the high sensitivity of the near-critical flow field to flow and channel conditions. Furthermore, the free surface has a wavy shape, which may indicate the occurrence of several transitions from supercritical to subcritical states and vice versa (i.e., undular hydraulic jumps). In this study, a flow model is used to predict an undular hydraulic jump in a rectangular open channel. The model is based on the general two-dimensional, Reynolds-averaged, Navier-Stokes flow equations. The resulting set of partial differential equations is solved using the FLOW-3D solver. The results are compared with the experimental data to validate the model. The comparative analysis shows that the proposed model yields good results. Several types of undular hydraulic jumps occurring in different situations are then simulated to prove the potential application of the model.
INTRODUCTION: Family-centered care sustains the unity of the child's and the family's health. The aim of this study was to determine nurses' attitudes toward parents' participation in the care of their hospitalized children in Iran in 2015.
METHODS: In this experimental study, 200 pediatric nurses from hospitals affiliated with the Shaheed Beheshti University of Medical Sciences in Tehran were selected using the multi-stage, random-sampling method. Data were gathered using a questionnaire that covered demographic information and nurses' attitudes. The questionnaire consisted of 31 items and was completed by the nurses in three stages: 1) before intervention (pre-test), 2) immediately after intervention (post-test), and 3) three months after intervention (follow-up). The data were analyzed via SPSS software and using descriptive and analytical methods. Descriptive statistics, the Spearman Correlation Coefficient, and Repeated Measure Analysis (the Bonferroni method) were used to assess the data.
RESULTS: The results indicated that there was a significant increase in the mean score of attitude after intervention [M (pre) = 3.35%, M (post) = 3.97%, p < 0.001)]. Most of subjects had neutral attitudes toward family participation in their children's care. There were no significant relationship between the nurses' socio-demographic characteristics and their attitudes.
CONCLUSION: The nurses' attitudes toward the family's participation in the care of their hospitalized children were moderate. The nurses' attitudes should be improved by taking part in continuous training programs.
KEYWORDS: attitude; family-centered care; nurses
BACKGROUND: Family-centered care (FCC) involves holistic care and requires cooperation with the family in planning, intervention, and the evolution of the care that is being provided. Many previous studies have provided results that indicate the importance of the family's involvement in pediatric care, but there is still resistance in doing so within the organizational culture of the hospitals in Iran. The aim of this study was to determine the effects of FCC on the satisfaction of parents of children hospitalized in 2012 in the pediatric ward at Razi Hospital in Chaloos, Iran.
METHODS: This Quasi-experimental study was conducted in 2012 in the pediatric ward at Razi Hospital in Chaloos, Iran. Seventy hospitalized children between the ages of 1 and 3 who suffered from diarrhea, vomiting, or pneumonia were selected through convenience sampling. They were divided randomly into two equal groups, a control group (routine care) and an experimental group (family-centered care). SPSS Statistics 14 software was used to analyze the data, and p<0.05 was considered to be significant.
RESULTS: In the FCC group, the mean score of satisfaction among the parents of the children was 20 out of 90 before the intervention, but, after the FCC method was used, it increased to 83.2 out of 90. In addition, a significant difference was found between the scores of satisfaction for the control and experimental groups (p<0.001), and all parents of children in the experimental group expressed high satisfaction.
CONCLUSION: Our findings showed that the practice of FCC in caring for the sick children can increase the satisfaction of their parents significantly. The role of the family's involvement is critical in every component of the intervention efforts, as shown by the constructs of participatory support, educational support, and psychological support. Thus, a notable implication here is that FCC may lead to increased quality of care and should be included in the educational programs of the nursing staff in pediatric ward.
KEYWORDS: Family-centered care; Iran; Nursing; Parents; Pediatric
The affinity of zeolite nanoparticles (diameter of 8-12 nm) possessing high surface area and high pore volume towards human plasma proteins has been investigated. The protein composition (corona) of zeolite nanoparticles has been shown to be more dependent on the plasma protein concentrations and the type of zeolites than zeolite nanoparticles concentration. The number of proteins present in the corona of zeolite nanoparticles at 100% plasma (in vivo state) is less than with 10% plasma exposure. This could be due to a competition between the proteins to occupy the corona of the zeolite nanoparticles. Moreover, a high selective adsorption for apolipoprotein C-III (APOC-III) and fibrinogen on the zeolite nanoparticles at high plasma concentration (100%) was observed. While the zeolite nanoparticles exposed to low plasma concentration (10%) exhibited a high selective adsorption for immunoglobulin gamma (i.e. IGHG1, IGHG2 and IGHG4) proteins. The zeolite nanoparticles can potentially be used for selectively capture of APOC-III in order to reduce the activation of lipoprotein lipase inhibition during hypertriglyceridemia treatment. The zeolite nanoparticles can be adapted to hemophilic patients (hemophilia A (F-VIII deficient) and hemophilia B (F-IX deficient)) with a risk of bleeding, and thus might be potentially used in combination with the existing therapy.