introduction: in cases of severe hard tissue loss, 2 mm circumferential ferrule is difficult to achieve. so in these cases we should use different ferrule designs. this in vitro study investigated the effect of different ferrule designs on the fracture resistance of teeth restored with bonded post and cores. materials and methods: forty freshly-extracted central incisors were endodontically tre...

We enumerate all minimal energy packings (MEPs) for small single linear and ring polymers composed of spherical monomers with contact attractions and hard-core repulsions and compare them to corresponding results for monomer packings. We define and identify "dividing surfaces" in polymer packings, which reduce the number of arrangements that satisfy hard-sphere and covalent-bond constraints. Co...

This study determined the situation of rural tourism and agro-tourism in Tehran Province as well as the expected economic impacts of agro-tourism development on it. In this research, we used documental research method and field research based on questionnaires and face-to-face interview. It was found out that despite different tourist attractions in rural areas of Tehran province, tourist arriv...

An understanding of density fluctuations in bulk water has made significant contributions to our understanding of the hydration and interactions of idealized, purely repulsive hydrophobic solutes. To similarly inform the hydration of realistic hydrophobic solutes that have dispersive interactions with water, here we characterize water density fluctuations in the presence of attractive fields th...

Many potential destinations are rich in cultural resources. As tourism becomes increasingly important for communities to showcase their capital, it is vital assess how tourists can be better understood and serviced through planning marketing attract more international visitors. The funnel process help policymakers understand the critical components of tourists' visiting behavior. conceptualizes...

Mass tourism, which may lead to environmental problems, cultural and social degradation, distortion of economic benefits and disease, particularly in poorer countries, provides financial reasons for preserving cultural, historical and natural resources or traditions, which otherwise may be neglected. Vanuatu, is a less developed country (LDC), reliant on tourism for such benefits. Therefore, th...