Find out more about the Osprey tracking. http://scottishwildlifetrust.org.uk/things-to-do/osprey/ Two chicks tagged with satellite trackers in 2015. In 21015, one fly 7352km and the other 6812km. Interestingly, the tracked ospreys don’t always take the same route, some travel along the west coast of Britain, another down the east coast and one Continue Reading
Degree
Notes from my degree course
Why research?
Simple answer – find things out. “body of knowledge” – everything we currently know. No one knows all of the body of knowledge but some people know each aspect. e.g someone may know all about atoms and how to build machines to answer questions about them, others may know all Continue Reading
Inventing something new
August 1991, Tim Berners-Lee at CERN turned on the first website, prior to this the world wide web did not exist. Prior to this, one would hava to visit the library to find out information. This is research by inventing something new.
Finding out something
Tends to apply to physical sciences involving experimentation and observation. e.g. observing behaviour of a bird to establish how it finds it’s way half-way around the world during migration. Use new technology such as GPS and micro-transponders to tag a bird and map their route. New knowledge as routes were Continue Reading
What is Research?
Answering questions. Research starts with a question. Research is: proving a theory done by experts used to establish facts about something scientific objective a lot of hard work and not fun All of above can apply and equally none! Scientific research – find out something new and something, or invent Continue Reading
Benefits of VoIP
Lower operational cost – single infrastructure, free additional features (caller ID & conference call). Flexibility – more than one call over single broadband connection. Security – encrypt/authenticate IP stream. Integration – video conversation, data file exchange & audio conference.
Corporate Users
Many large companies have extensive data communications networks internally and across sites. No need to spend extra for voice services, use existing network for VoIP services. Advantages: Migrating from copper-wire to VoIP over data network Better use of bandwidth Lower cost – no duplicating services Unified communication systems – single Continue Reading
Telecommunication Providers
“IP Backhaul” – providing links between switching stations (exchanges) and connecting between providers. Some providers rolling out VoIP in place of standard telephony service.
Consumer Market
Available since 2004. Delivered by existing broadband connection. Behaves much like standard Public Switched Telephone Network (PSTN). Requires equipment: Dedicated VoIP phone, or Adaptor for standard analog phone, or Software and headset/web cam Benefit for home users is ability to make free phone calls, especially when making long distance calls. Continue Reading
SIP Messages
SIP protocol defines several messages: INVITE: inviting user to call BYE: terminating connection between two end points ACK: reliable exchange of invitation messages OPTIONS: get information about capabilities of call REGISTER: passes user location information to SIP registration server CANCEL: terminates search for user