Let G be a countable group, Sub(G) be the (compact, metric) space of all subgroups of G with the Chabauty topology and Is(G) ⊆ Sub(G) be the collection of isolated points. We denote by X! the (Polish) group of all permutations of a countable set X. Then the following properties are equivalent: (i) Is(G) is dense in Sub(G); (ii) G admits a ‘generic permutation representation’. Namely, there exis...

let h be a subgroup of a group g. h is said to be s-embedded in g if g has a normal t such that ht is an s-permutable subgroup of g and h ∩ t ≤ h sg, where h denotes the subgroup generated by all those subgroups of h which are s-permutable in g. in this paper, we investigate the influence of minimal s-embedded subgroups on the structure of finite groups. we determine the structure the finite grou...

Background Online focus groups have been increasing in use over the last 2 decades, including in biomedical and health-related research. However, most of this research has made use of text-based services such as email, discussion boards, and chat rooms, which do not replicate the experience of face-to-face focus groups. Web conferencing services have the potential to more closely match the face...

I consider how the saving behavior of consumers is affected by incomes in their reference group. Although standard life cycle models with interdependent preferences provide no clear cut prediction of how incomes in one’s reference group should influence savings, the empirical analysis points to an unambiguously negative effect: If incomes in the reference group are higher, savings are lower. Th...

A finite group G is called a B-group if every proper subgroup of G is either normal or abnormal in G. In this paper the authors classify the non-B-groups whose proper subgroups are all B-groups.

Well-being in a small group can be tied to how much its members interact. Small group tours are social occasions, and the discussion that ensues has been shown by ethnographers to be important for a more enriching experience. Increasing conversation can thus be seen as a way to improve social and psychological well-being. We present DramaTric, a mobile presentation system that delivers hour-lon...

Treatment and support of a child with DSD calls for experience and expertise in diagnosis, surgical techniques, understanding of psychosocial issues, and recognizing and accepting the significance of individual values of children, families, and support groups. The range of what is considered "appropriate" care and treatment is still very broad and critics point at major gaps between ethical gui...

groups are a prominent feature of today’s educational landscape, with black and Hispanic children regularly falling far behind white children. Although the achievement gaps narrowed somewhat during the 1970s and 1980s, they have since proved stubbornly resistant to closing further. If the nation is to achieve the goal of equal education as “a fact and a result,” to borrow President Lyndon Johns...

Methods for choosing an appropriate sample size in animal experiments have received much attention in the statistical and biological literature. Due to ethical constraints the number of animals used is always reduced where possible. However, as the number of animals decreases so the risk of obtaining inconclusive results increases. By using a more efficient experimental design we can, for a giv...

A qualitative method using focus group discussions (FGDs) was applied in this study to identify people's perceptions on newspaper reporting pertaining to the Southern Separatist Movement (SSM) by different Yemeni newspapers. This paper also looked into the attitudes towards the movement and the popularity of the issue of Yemeni unification. Five FGD groups with a total of 30 participants discus...