Different types of contact, including contact between node pairs, any-contact of nodes, and contacts of the entire network, are used to characterize social relations in mobile social networks. Different modes of routing, from the point of view of message delivery semantics, encompass unicasting, multicasting, any-casting, and broadcasting. Studies have shown that using probability distribution functions of contact data, which is mainly assumed to be homogeneous for nodes, improves the performance of these networks. However, there exists an important challenge in studies on distributions. A lot of works apply the distribution of one type of contact to other types. Hence in routing applications, it causes to use of the distribution of one type of contact for any mode of routing. This study provides a complete solution to model each type of homogeneous contact data distribution and to use them in different modes of routing. We propose a routing algorithm that uses this new model. Results show that our solution improves the average latency of comparing methods Epidemic, TCCB, and DR about 3.5-times, 30%, and 45%, respectively. It achieves a delivery rate of about 5% and 6%, and average latency about 6% and 8% better than that of DR and TCCB, respectively.

Background and Aim: In patients with complete denture, some clinicians have used modelling plastic impression compound (MPIC) along tissue conditioner (TC) materials simultaneously. Little information is available on the composition of these materials and the interaction between them. The purpose of this study was to evaluate the influence of two components of MPIC on the structure and chemical composition of TC.Materials and Methods: In this experimental study, MPIC specimens were provided in 25×2 mm discs. Specimens were randomly divided into three groups and were immersed in ethanol 70%, plasticizer (dibutyl phthalate) and a mixture of them (ethanol 70% and dibutyl phthalate). All of the discs were weighed with a digital balance before and 2, 4, 6 and 24 hours after immersion. Values were analyzed by non parametric Kruskal-Wallis (a= 0.05) and SPSS 16 for Windows (SPSS Inc., Chicago, IL) was used for statistical analysis.Results: Statistical analysis indicated significant differences among all groups (p>.05).Conclusion: Dibutyl phthalate (DBP) had high impact on the solubility of MP, while the mixture of dibutyl phthalate (DBP) and ethanol demonstrated the highest impact.

Background and Aim: There are different methods of oral health education for child population. Theater show is a method that has not received enough attention until now. The aim of this study was to evaluate the effect of using theater show on dental health education in Yazd female elementary students.Materials and Methods: This was a quasi experimental study performed by using pre- and post-test method in Iran over the year 2004. One elementary school from each region of the city was selected. Twenty students from each grade of each school were included in the study (n=200). The information on knowledge, attitudes and practice of oral health were collected by using a valid and reliable questionnaire before and after theater show performance. Data were analyzed using SPSS and Wilcoxon signed rank test.Results: This study showed that the theater show could improve knowledge, attitude and proper oral health practice of children. The effect of the theater show on knowledge was more than attitude and was more on attitude than practice (P<0.001). Only literacy on the part of mothers was significantly correlated with practice (P=0.021). There were significant correlations between Knowledge (P=0.020), Attitude (P=0.0001) and oral health Practice (P=0.022) with students' grade level.Conclusion: This study showed that using theater show for oral health education, could improve the oral health related knowledge, attitude and proper oral health practice by elementary school students.

Background and Aim: Temporomandibular disorder is a broad term referring to jaws dysfunction. Investigators have presented several factors for the etiology of TMD (temporomandibular disorder), one of them is malocclusion. Balancing premature contacts are also recognized as a type of malocclusion. Therefore, the aim of this research was to determine the relation between balancing premature contacts and TMD. Secondary objectives as parafunctional habits and type of occlusion were also investigated.Materials and Methods: Sixty patients, 55 females and 5 males, referred to TMD ward, Faculty of Dentistry, Tehran University of Medical Sciences were selected. All samples had TMD signs and symptoms (TMJ) pain, joint malfunction, pain and malfunction of masticatory muscles.On the other hand, 60 patients, referred to oral diseases diagnosis department, without any problems were selected as controls. All patients were at the age range of 20-40 years old. Following complete examination and filling a questionnaire by all patients, data were analyzed by χ2.Results: There was no significant relationship between TMD and balancing interferences. Parafunctional habits in TMD patients was more prevalent comparing to the controls. No significant relation was found between TMD and type of occlusion. Crossbite and overjet more than 4mm were more prevalent among TMD patients.Conclusion: The most common factors influencing TMD are increased overjet and crossbite

Introduction: The aim of this study is to predict the per capita outpatient contacts of social security insured from 2020 to 2025 tract. Methods: To perform the prediction, a five-step method including determining the purpose of the prediction, determining the time horizon, selecting the prediction model, performing the prediction and determining its accuracy was used. Results: The number of outpatient contacts of social security insured at the end of 2025 will be equal to 553, 124, 688. Of these, 157, 843, 600 will be referred to social security medical centers (28. 5%) and 395, 281, 088 will be referred to public and private centers (71. 5%). In 2019, each insured person had an average of 10. 92 outpatient contacts. Of this amount, 3. 24 referred to the medical centers of the Social Security Organization and 7. 68 referred to public and private centers of the contracting party. It is predicted that by the end of 2025, each insured person will have 11 outpatient contacts, of which 3. 14 contacts will be to social security medical centers and 7. 86 will be to public and private medical centers. Conclusion: The per capita number of outpatient contacts of social security insured will increase by 0. 08 by 2025. That is, for every 100 people, there will be 8 more contacts than in 2019. Despite the slight increase in per capita outpatient contacts until 2025, per capita contacts in 2025 will still be 0. 74 units lower than the maximum per capita contacts in 2009. The estimated per capita is lower than the actual per capita due to the non-registration of claims outside the insurance coverage.