Tuesday, November 20, 2012

Internet Ethics

IS THERE A PLACE FOR ETHICS? In considering whether there is a place for ethics on the Internet, we need to have understanding of what such a grand word as ‘ethics’ means in this context. I suggest that it means four things:
  1. Acceptance that the Internet is not a value-free zone This means that the World Wide Web is not the wild wild Web, but instead a place where values in the broadest sense should take a part in shaping content and services. This is a recognition that the Internet is not something apart from civil society, but increasingly a fundamental component of it.


  1. Application of off-line laws to the on-line world This means that we do not invent a new set of values for the Internet but, for all the practical problems, endeavour to apply the law which we have evolved for the physical space to the world of cyberspace. These laws might cover issues like child pornography, race hate, libel, copyright and consumer protection.
  2. Sensitivity to national and local cultures This means recognising that, while originally most Internet users were white, male Americans, now the Internet belongs to all. As a pervasively global phenomenon, it cannot be subject to one set of values like a local newspaper or national television station; somehow we have to accommodate a multiplicity of value systems.


  1. Responsiveness to customer or user opinion This means recognising that users of the Internet – and even non-users – are entitled to have a view on how it works. At the technical level, this is well understood – bodies like the Internet Engineering Task Force (IETF), the Internet Corporation for Assigned Names and Numbers (ICANN) end the World Wide Web Consortium (W3C) endeavour to understand and reflect user views. However, at no level do we have similar mechanisms for capturing user opinions on content and access to it.
     
 

Sunday, November 18, 2012

Nice Pictures about Pearl cultivation







How cultivate pearl?

 
 
 


To produce a pearl the pearl oysters are seeded by placing a nucleus derived from the shell of the Mississippi mud mussel together with a piece of donor mantle tissue into the oyster. Pearl nacre forms around the nucleus, creating the pearl. A series of turning actions occur after the nucleus is implanted to assist in the development of a well shaped pearl sac to ensure even coating of the nacre. It takes two years to produce a pearl. If an oyster produces a good quality round pearl, it may be re-seeded with another nucleus and maintained for another full grow-out cycle. However, only a small proportion of oysters are seeded a second time and even less a third time. Re-seeded pearl oysters generate larger pearls, as a space has already been created in the oyster by the production of the first pearl. Farmed pearls vary in size, shape and quality, and are priced accordingly. There are also several other products from pearl oyster culture, namely Keshi (natural pearls of various shapes and sizes), Mother of Pearl (MOP - pearl oyster shell used for buttons, jewellery and decorative inlays) and pearl meat (the adductor muscle of the pearl oyster). If you want to know more see the following pd; http://www.ctsa.org/files/publications/CTSA_1276316728619239483681.pdf

 

Aquaculture

 
 
Aquaculture, also known as aquafarming, is the farming of aquatic organisms such as fish, crustaceans, molluscs and aquatic plants. Aquaculture involves cultivating freshwater and saltwater populations under controlled conditions, and can be contrasted with commercial fishing, which is the harvesting of wild fish.[4] Mariculture refers to aquaculture practiced in marine environments and in underwater habitats. If you wante more information see the falloing website;
http://en.wikipedia.org/wiki/Aquaculture