Spelling suggestions: "subject:"world anline"" "subject:"world bnline""
1 |
The emergence and growth of dial-up internet service providers (ISPs) as a means of access to the internet in South Africa: a case study of M-Web and World OnlineDe Vos Belgraver, Cecilia Susan January 2003 (has links)
The desire amongst media scholars for the fulfilment of the ideal of a universally accessible public sphere by the media is such that virtually every new communications technology that has emerged over the past 1 ~O-odd years such as radio, television or the Internet has been welcomed with enthusiasm - by some - at the prospect of the newest communications innovation bringing about universal access to information. However, the history of communications media tells of the commercialisation of each new medium, from radio to television, and the imposition of barriers to access, based on cost. Access to communications media is open to those people who can afford to pay for them. 111e emergence of the Internet spawned renewed hoped that the public sphere ideal would be realised. 111is new technology seemed more powerful than anything that had come before it. The Internet offered the means whereby one could access a global repository of information, stored on a worldwide network of computer networks, and available 24 hours a day. With the Internet, it was also possible to communicate with people on the other side of the world within seconds, using electronic mail (e-mail). Here was a medium that permitted one to send text and pictures to colleagues and friends within a fraction of the time taken by traditional means such as fax, telephone or post. To enjoy the convenience of the Internet though, one had to have a means of access. In South Africa, access could be gained through a personal computer linked to the Internet either through a network in the workplace or an academic or research institution, or via a telephone link to an Internet Service Provider (ISP). What were the names of the first ISPs to emerge in South Africa? When did they emerge and how did they develop? Did the number of ISPs grow or decline? What do ISPs give access to, at what cost and to whom? Do they provide universal access to information? This study addresses these questions by examining South Africa's leading providers of home dial-up internet access, M-Web and World Online, and by exploring the histories of their emergence and development, within the context of current media trends of concentration, diversification and globalisation.
|
2 |
Assessing extinction risk across the geographic ranges of plant species in EuropeHolz, Hanna, Segar, Josiane, Valdez, Jose, Staude, Ingmar R. 11 July 2023 (has links)
Societal Impact Statement
Plants play fundamental roles in ecosystems, yet merely 10% of species have an
assessment of their global extinction risk. Through the integration of national Red
Lists and comprehensive global plant distribution data, we identify previously
unassessed plant species in Europe that are threatened throughout their geographic
range and thus at risk of global extinction. Our workflow can be replicated to facilitate
the integration of disparate national monitoring efforts around the world and
help accelerate global plant risk assessments.
Summary
• A comprehensive extinction risk assessment for plant species is a global biodiversity
target. However, currently, only 10% of plant diversity is assessed in the
global Red List of Threatened Species. To guide conservation and restoration
actions in times of accelerated species extinction, plant risk assessments must be
expedited.
• Here, we examine the extinction risk of vascular plant species in Europe through
the integration of two data streams: (1) national Red Lists and (2) global plant distribution
data from Kew's Plants of the World Online database. For each species
listed on a national Red List, we create a list of countries that form part of its range
and indicate the threat status in these countries, allowing us to calculate the percentage
of the range in which a given species is listed as threatened.
• We find that 7% to 9% of European vascular plant diversity is threatened in its
entire range, the majority of which are single-country endemics. Of these globally
threatened species, 84% currently have no assessment in the global Red List.
• With increasing national biodiversity monitoring commitments shaping the post-
2020 policy environment, we anticipate that integrating national Red Lists with
global plant distribution data is a scalable workflow that can help accelerate global
risk assessments of plants.
|
Page generated in 0.046 seconds