cloud computing and ubiquitous computing systems

cloud computing and ubiquitous computing systems

1. cloud computing and storage

   • cloud computing means using computer services on another organisations computers,which are known as hosts
   • the services are provided by organisations known as hosting compaines
   • some well-known hosting companies for cloud include amazon, microsoft, google and RackSpace
   • cloud uses can access software, data and storgae in the hosts computers, which ill be at a remote location
   • users do this through a web browser or mobile app, without ever directly accesssing the servers that the information is stored on
   • cloud storage is related to cloud computing - it is where only the storage, access and retrieval facilities are provided by the host provider often via the internet
   • benefits
     • cost and convinience: you only pay for the storage that you have used. you dont have to provide and maintain the hardware locally
     • avaliability: data and files may be available anywhere in the world where there is an internet connection
   • concerns
     • reliability of network: you need to be able to get through to the host to access and processs data
     • software: the host might not be using the latest, fastest and most secure version.
     • potentially lower performance: the speed of the retrieval of data may be slower than it would be on a local database held in-house
     • security of data: as the files are being sorted by the host, you hva eno control over them. you need to be aware of their security terms and policies

2. ubiquitous computing systems

   • ubiquitous means 'existing everywhere'
   • processors can be embedded in any device, including clothing, appliances, vehicles, buildings and people, to connect them to the internet so that the data generated by the processors will be readily avialable

3. Radio fequency identification (RFID)

   • currently, objects within a ubiquitous computing environment usually contain radio frequency identification chips.
   • RFID is a technology that uses radio waves to transfer data to a tag on a person or an object so that the person/object can be identified and tracked.
   • these tags contain information that is stored electronically and which can be transmitted.
   • it is similar to the bar code system used in supermarkets, but unlike a barcode, RFID does not need to be scanned.
   • an example of a use of RFID is the cat flaps that only open for the animal that has the correct chip to its collar.

4. applications of ubiqutous computing

   • there are computer systems in place which monitor the shelf and wharehouse stock. this technology is used in many industries (supernarkets, book and DVD suppliers, car manufacturers, etc.)
   • when the stock reaches a certain minimum level, an order is automatically placed with the appropriated supplier electronicaly.
   • mailny it is done by a process where the tills feed products sales to a central computer, whick then calculates the present stock. currently manual checks still central computer, which then calculates the present stock.
   • currently manual checks have to be made to allow for 'shrinkage'(i.e. loss due to theft or damage)