This paper examines online communities and describes how they can be differentiated from other Internet supported group interactions. A definition of an online community is given and three generic types are identified. These types are defined by the community models based on the value proposition for the sponsors and members. The value proposition for members is strongly influenced by the model...

Combating Attacks and Abuse in Large Online Communities

HBV screening and vaccination are not done, in part because of the cost involved, as reflected in a recent report of the experience of 14 Boston community health centers. In these centers only 2 (1.1 percent) of 178 such susceptible patients received vaccine.6 Gjerdingen has shown that a practice-based community intervention can make a real difference. I hope that others in similar settings wil...

discussion the oep as a home-based exercise is effective for the reduction of the incidence of falls among senior citizens with a history of falls. the oep can be recommended for elderly homebound people who do not have access to facilities. results the findings of the study showed that oep improved physical performance (berg-balance-score with p > 0.025, and timed-up-go-test with p > 0.017) an...

introduction: mild cognitive impairment can be considered as an intermediate clinical state between normal cognitive aging and mild dementia. elderly people with this impairment represent an at-risk group for the development of dementia. the aim of this study was to investigate the prevalence of cognitive impairment in community-dwelling older adults by mini-mental state examination (mmse) and ...

writing projects are socially-situated identities. the rhetorically-loaded aspects of writing, like metadiscourse marking, are more prone to carry such identities. through analyzing metadiscourse strategies employment in persian and english (as the lingua franca of academic discourse community) research articles, this study makes an attempt to find out whether persian native writers take on the...

a long-term study was conducted between 1985 and 2003 on rehabilitation trials at sishen ironore mine, south africa, to identify grass species that would survive in the artificial growth medium appliedto the sites, and to determine the most suitable medium for sustainable vegetation growth. vegetationestablishment was tested at slopes of 18° and 34° and with five different cover materials. afte...

migration of people to urban areas from the rural areas usually comes with its challenges interms of infrastructural requirement and housing to cater for growing population. one of the challenge for the urbandwellers in nigeria is that of adequate housing. the inability of the government to meet this demand has seen thepeople concerned seeking alternative solutions to housing need. the resultin...

dust storms are catastrophic natural disasters that beside other disasters frequency occur in the arid and semiaridregions worldwide. drought occurrence, climate aridity, dryness of the hamoun lake cause strong winds to below.these conditions have been prepared for dust storms in sistan region. the damages to sistan society have beenmeasured using different criteria. the result shows that, peak...

conclusions development of the job and task analysis to ensure providing the right training needs, applying more evidences through different studies for reforms, more decentralized equipped system with decision-making tools have been proposed for development. results the results showed the specific method of student selection and clear objectives and standards of training related to the health ...