A continually increasing number of pictures and videos is shared in online social networks. Current sharing platforms however only offer limited options to define who has access to the content. Users may either share it with individuals or groups from their social graph, or make it available to the general public. Sharing content with users to which no social ties exist, even if they were physi...

In this study, the author describes the nature and occurrence of knowledge-construction links (KCLs) in 3 6th-grade classrooms that varied in degree of learner centeredness. KCLs are operationalized as prior learning that students bring to their current classroom experiences and include school and nonschool experiences. They are hypothesized to facilitate a knowledge-construction process that v...

A graph G is an efficient open domination graph if there exists a subset D of V (G) for which the open neighborhoods centered in vertices of D form a partition of V (G). We completely describe efficient domination graphs among direct, lexicographic and strong products of graphs. For the Cartesian product we give a characterization when one factor is K2 and some partial results for grids, cylind...

In 2 diary studies of lying, 77 college students reported telling 2 lies a day, and 70 community members told 1. Participants told more self-centered lies than other-oriented lies, except in dyads involving only women, in which other-oriented lies were as common as self-centered ones. Participants told relatively more self-centered lies to men and relatively more other-oriented lies to women. C...

Along with the long-term preservation of digital publications the next important goal is public access and in this regard user-centred design of digital repositories. Several repositories worldwide have shown that users are their most critical element. Repositories as such are valuable only if used. The success of the repository is often influenced by the content and the design of the interface...

background: osteoporosis is a serious public health. since the majority of bone mass occurs during adolescence, primary prevention  is important. probably mother’s participation in health education interventions leads to promote health behaviors in children. to assess a lifestyle modifcation intervention focused on mothers and students has an impact on osteoporosis preventive  behaviors in adol...

Disorders of the Central Nervous System (CNS) are worldwide causes of morbidity and mortality. In order to further investigate the nature of the CNS research, we generate from an initial reference a controlled vocabulary of CNS disorder-related terms and ontological tree structure for this vocabulary, and then apply the vocabulary in an analysis of the past ten years of abstracts (N = 10,488) f...

abstract background: one of the most critical periods of the life of a person is adolescence. during this period, individuals face many problems such as low self‑esteem. self‑esteem can be influenced by many factors such as school, friends, and inner personality, but it seems that the family has a crucial role in shaping self‑esteem. therefore, the present study aimed to determine the relations...

background: academic optimism about teachers is a new construct. the objective of this study was investigation of primary school teachers' academic optimism and organizational citizenship behavior in shiraz city. methods: the method of this study was descriptive and correlational study. the population of this study were all teachers (men and women) working in the 1391-1392 school year in public...

Graph-like data structures and rule-based systems play an important role within many branches of computer science. Nevertheless, their symbiosis in the form of graph rewriting systems or graph grammars are not yet popular among software engineers. This is a consequence of the fact that graph grammar tools were not available until recently and of the lack of knowledge about how to use graph gram...