Recommender Systems Based On Time and Trust Using Graph Based Community Detection

Recently, the Internet has played a significant and substantial role in people's lives. However, the content available in the global web environment should align with users' daily needs, providing them with useful and up-to-date information tailored to their tastes. In this context, recommender systems assist users by suggesting items that closely match their preferences in less time. Today, with the exponential growth of data, the utilization of recommender systems has surged. Conversely, these systems encounter challenges such as evolving user preferences over time, cold start problem, sparsity within the user-item matrix, the infiltration of fake users in the systems, and their adverse impact on the recommendation lists.The objective of this paper is to propose a recommender system grounded in time and trust factors to enhance the efficiency and precision of system recommendations. Initially, the proposed system addresses the data sparsity dilemma by incorporating reliable implicit ratings into the user-item matrix. Subsequently, it constructs a weighted user-user network based on user rating timestamps and trust relationships among users, thereby mitigating the cold start problem and accounting for changing user preferences over time. The proposed recommender system employs a novel community detection algorithm introduced in this paper to identify the nearest neighbors of active users and recommends the top @k items based on the collaborative filtering approach. Evaluation results of the proposed system, tested on a film recommender system using the Epinions dataset, demonstrate its superior efficiency compared to basic systems

Nurses’ attitude towards attendance of nursing students in the clinical setting in Shahrekord in 2015

Background and Purpose: Attendance of nursing students in clinical settings is an inherent element of nursing education. This study aimed to evaluate the attitudes of nurses toward the attendance of nursing students in clinical settings in Shahrekord, Iran. Methods: This descriptive study was conducted in Hajar teaching hospital of Shahrekord city, Iran in 2015. Using convenience sampling, 150 eligible nurses were selected for this study. Data were collected using demographic questionnaires and Stagg’s attitude scale. In addition, we assessed the viewpoints of nurses regarding the advantages and disadvantages of the attendance of nursing students in clinical environments using two open questions. Data analysis was performed using Chi-square, Student’s t-test, and Pearson’s correlation-coefficient. Results: Negative attitude toward the attendance of nursing students in clinical settings was observed in 82% of the participants. Moreover, 80.7% of the nurses believed that nursing students are not able to acquire sufficient clinical experiences in clinical environments. On the other hand, no significant correlation was observed between age, work experience, marital status, and attitude toward the attendance of nursing students in clinical settings (P>0.05). However, this difference was only significant in terms of the ward of employment (P=0.004), so that nurses engaged in the psychiatric ward had a more positive attitude toward this concept compared to other nurses. Conclusion: According to the results of this study, special attention must be paid to the clinical education of nurses with regard to their experiences and viewpoints toward improving clinical learning

Women's Needs on Bed Rest during High-risk pregnancy and Postpartum Period: A Qualitative Study

Background & aim: pregnancy is a normal part of life, however, high-risk pregnancy that need bed rest can be stressful and affect woman and her family. Therefore, understanding the needs of women on bed rest seems to be necessary to enhance the quality of care services. The present study was conducted to investigate the women's needs on bed rest during high-risk pregnancy and postpartum period. Methods: This qualitative study was performed among women with high-risk pregnancy using purposeful sampling method. Data were collected by conducting 31 semi-structured interviews with 21 pregnant women, 10 spouses, and 7 medical staff involved in their healthcare. Data analysis was carried out using conventional content analysis developed by Hsieh and Shannon. Results: According to the results, there were four main categories of needs entailing the need for psychosocial support, support for family and personal affairs, support for looking after children, and the need for economic support. The final category was the need for comprehensive support. Conclusion: The personal and family life of pregnant women is affected during bed rest. Accordingly, comprehensive support is needed to enable women to cope with these problems. To reach this goal, the provision of family-centered support services based on coordination among health sections, supporting organizations, charities, social workers, and systems providing psychological and consultation services are recommended

Evaluation of relationship between reproductive health literacy and demographic factors in women

Background and objective: Introduction: Health literacy is the ability of people to acquire, understand and use health information that is necessary to decide on this field.  Since, reproductive health literacy promotion is known as one of the strategies to meet reproductive health goals in different groups of women. This study aimed to evaluate the relationship between reproductive health literacy and demographic factors in women of Isfahan city. Methods:This study was a descriptive-analytic research that was evaluated women's reproductive health literacy and its related factors in Isfahan using the questionnaire of health literacy scale for women of reproductive age. Sampling method was easy and 235 women were enrolled in the study. Data analysis was performed using the software SPSS20. Results: The average age of these women was 27/8 ± 11/01 years, most were high school graduates and married. The reproductive health literacy score was desirable in 91% of women and two variables of marital status and age had correlation with reproductive health literacy scores. Conclusion: The results showed marital status and age were two related factors to women's reproductive health literacy level. Accordingly, the reproductive health literacy scores of women younger than 25 years old and unmarried women were lower than other groups. Paper Type:Research Article

Potential Protective Effect of Pretreatment with Caraway Essential Oil in vivo Model of Iron Nanoparticle-induced Liver Injury

Recently, there has been a great deal of interest in the use of the medicinal plants with high antioxidant compounds for curing liver injuries induced by hepatoxcitic agents. This study was to assess the protective effect of Carum carvi L. essential oil (E.O) on the hepatoxitic rats induced by overdose of iron oxide nanoparticles (NPs). The rats were distributed to 4 groups. In negative control group (NC), the rats received normal saline and DMSO daily for 3 days. In control group (C), iron oxide nanoparticles (Fe2O3) (200 mg/kg b.w) was injected daily for 3 days. In the treatment groups, iron oxide nanoparticles plus E.O at 100 & 200 mg/kg b.w were injected daily for 3 days. In following, cytochrome P450 (CYP450), glutathione S-transferase (GST), glutathione (GSH), aspartate transaminase (AST), alkaline phosphatase (ALP) and alanine transaminase (ALT) were estimated at 72 h after NP-treatment. The administration of the E.O could return considerably the decrease of the GST and GSH levels as well as the increase of the level of AST induced by iron oxide NPs. These results are in agreement with histopathological results. The data indicated that E.O provided an efficient prevention against iron oxide NPs-induced hepatotoxicity in rats

Sulfur dioxide reduces hippocampal cells death and improves learning and memory deficits in rat model of transient global ischemia/reperfusion

Objective(s): According to recent the findings, sulfur dioxide (SO2) is produced by the cardiovascular system, influencing some major biological processes. Based on previous research, SO2 exhibits antioxidant effects and inhibits apoptosis following cardiac ischemia/reperfusion. Therefore, the objective of the current study was to examine the neuroprotective impact of SO2 following global cerebral ischemia/reperfusion (I/R).Materials and Methods: Forty-eight male Wistar rats that weighed 260–300 g, were randomly allocated into 4 groups: sham group (n=12), I/R group (n=12), and I/R+SO2 groups (NaHSO3 and Na2SO3; 1:3 ratio; 5 and 10 µg/kg, respectively; for 3 days, n=12). Cerebral ischemia model was prepared by occlusion of both common carotid arteries for 20 min. Saline as a vehicle and SO2 donor at doses 5 µg/kg (intraperitoneally) were injected for 3 days after reperfusion. Four days after ischemia, the passive avoidance memory test was carried out in four groups, and after behavioral assessment, necrosis, apoptosis, and antioxidant enzyme analysis were carried out.Results: SO2 treatment could significantly improve memory impairments in rats with cerebral ischemia/reperfusion (I/R) (

The Comparison of Marital Satisfaction between Fertile and Iinfertile Women

Objectives: This research studied and compared marital satisfaction level of the women who have infertility problem with those who does not have this problem. Methods: Totally 180 persons participated (90 infertile women and 90 fertile women) were participated in this study. Participants were comprised of those referring to 3 Tehran city infertility centers. For data gathering in this research, the constructed questionnaire and Enrich Marital Satisfactions questionnaire have been used. Data analysis has been done with use of two independent t-tests and one way variance analysis has been done. Results: Results showed significant difference in satisfaction level of the fertile and infertile women, while, our research hypotheses were not confirmed in this regard by studying factors effective on marital satisfaction of the infertile women. The number of unsuccessful pregnancies whether in fertile women or infertile women didn’t have considerable effect on the marital satisfaction, while, effect of this factor on marital satisfaction level of the infertile women was higher than that on the fertile women. Discussion: Generally, by inclusion of limitations in this plan, it is impossible to generalize the present research results with difficulty, though it is inevitable to emphasize on negative consequences of the spouses' life and it is important to pay attention to its different dimensions