Numerous studies have related dental caries experience of children with the frequency of their toothbrushing or with their oral cleanliness at the time of examination. Conflicting results were obtained and, therefore, no conclusions may be drawn from these studies. In other studies, the incidence of new carious lesions over a number of years was related to oral cleanliness during the same perio...

To identify the prevalence and risk indicators of periodontal disease in high-school students in Tehran, Islamic Republic of Iran, the periodontal condition of 867 students aged 15-19 years was assessed using the community periodontal index of treatment needs (CPITN). The results showed that 88.7% of these students had less than perfect periodontal health. Multiple regression analysis revealed ...

This paper describes our experiments with a distributed manipulation system. We study a system in which multiple robots cooperate to move large objects such as furniture and boxes using a constrained prehensile manipulation mode, by wrapping ropes around them. The system consists of three manipulation skills: tieing ropes around objects, affecting translations using a flossing manipulation gait...

This paper describes a system in which multiple robots cooperate to move multiple objects such as groups of boxes using a constrained prehensile manipulation mode, by wrapping ropes around them. The system consists of three manipulation skills: tieing ropes around objects, affecting rotations using a flossing manipulation gait, and affecting translations using a ratcheting manipulation gait. We...

We prove a conjecture of Postnikov, Reiner and Williams by defining a partial order on the set of tree graphs with n vertices that induces inequalities between the γ-polynomials of their associated graph-associahedra. The partial order is given by relating trees that can be obtained from one another by operations called tree shifts. We also show that tree shifts lower the γ-polynomials of graph...

BACKGROUND The goal of this study was to determine the application of health belief model in oral health education for 12-year-old children and its effect on oral health behaviors and indexes. METHODS A quasi-experimental study was carried out on twelve-year-old girl students (n-291) in the first grade of secondary school, in the central district of Tehran, Iran. Research sample was selected ...

BACKGROUND Adoption and maintenance of health behaviors are often poorly predicted by behavioral intentions. To bridge the gap between intentions and behavior, strategic planning and recovery self-efficacy have been suggested as proximal predictors. PURPOSE The aim was to examine the usefulness of a prediction model that includes planning and self-efficacy as postintentional mediator variable...