*Thursday, 11:35 a.m, Lab, IT subject*

GREEN TECHNOLOGY.....

              what can you defined green technology ?

from the research that i have search,, what i can conclude is green technology is one of the best way to save the earth. it is because green technology teach us not to easily throwing rubbish anywhere that we want to.... we must love and care about our earth...

              there is some examples of green technology subject area which is energy,, green building,, green chemistry,, and also green nanotechnology.... 

and now we discuss about the first one that is Energy... energy is the most urgent and important issues for green technology,, this is incude development of alternative fuels,, and that is generating energy and energy efficiency.....   

             other than that is Green Building... green building is encompasses everything from the choice of building materials to where a building is located.. we must make sure that the building located suitable to other living things..

             Green Chemistry....means by the invention, design and application of chemical products and processes to reduce or to eliminate the use and generation of hazardous substances... the last one is green nanotechnology..... Nanotechnology involves the manipulation of materials at the scale of the nanometer, one billionth of a meter. Some scientists believe that mastery of this subject is forthcoming that will transform the way that everything in the world is manufactured. "Green nanotechnology" is the application of green chemistry and green engineering principles to this field.

             A brief explanation of Green Technologies in every day language - The development of better tools for recycling, water purification, sewage treatment, environmental remediation, solid waste management, and renewable energy.

This is not a complete explanation but it is a start. The field and subject is enormous and growing each day. This is, to say the least, an exploding field of study largely funded with government money.

                                                 one of the example----------->

                                                              (solar energy) 

<-----------green car..   =)

<---- think before you act...=)

okay,,,, thats all for today... =)

assalamualaikum.....
today is 19/03/2012....
our first class after our semester break... and our lecture, Pn. Rahimah give us some work to do and that is advantages and disadvantages of network topology.... this is little about topology...

What is a network topology? In communication networks, a topology is a usually schematic description of the arrangement of a network, including its nodes and connecting lines. There are two ways of defining network geometry: the physical topology and the logical (or signal) topology.
The physical topology of a network is the actual geometric layout of workstations.
 ( i take it from internet)..

Star Network

-Advantages

• Good performance
• easy to set up and to expand. Any non-centralised failure will have very little effect on the network, whereas on a ring network it would all fail with one fault

-Disadvantages

• Expensive to install
• Extra hardware required

Ring Network

-Advantages

• Data is quickly transferred without a ‘bottle neck’. (very fast, all data traffic is in the same direction)
• The transmission of data is relatively simple as packets travel in one direction only.
• Adding additional nodes has very little impact on bandwidth

-Disadvantages

• Data packets must pass through every computer between the sender and recipient therefore this makes it slower.
• If any of the nodes fail then the ring is broken and data cannot be transmitted successfully.
• It is difficult to troubleshoot the ring.

Bus Network

-Advantages

• Easy to implement and extend
• Well suited for temporary networks (quick setup)
• Initially less expensive than other topologies
• Cheap

-Disadvantages

• Difficult to administer/troubleshoot.
• Limited cable length and number of stations.
• If there is a problem with the cable, the entire network goes down.
• Maintenance costs may be higher in the long run.

and i give you some image of network topology....

this is the image for star network topology.... =)

this one is the image for ring network topology..=)

 

this is bus network topology.. =)

 so,, i hope that you will know about topology network and understands how it work... =)  

okay... thats all for today... take care =)

   ~Philosophy is a study that lets us be unhappy more intelligently~

and thinking out of the box okay... =)