communication technology itgs
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Presentation and assignmentsTRANSCRIPT
Communica)on technology
Made by: Ignes Kusuma Grade 12 ITGS
Devices
• Handphone • GPS (Global Posi)oning System) • iPad • TV (Television) • Radio • Computer • Fax machine • DVR (Digital Video Recorder) • Headphones • Mouse (for computers or laptops)
Handphone
• Advantages: -‐keeps us in constant contact with people we consider important -‐help us seek help immediately during emergency cases -‐portable (can be carried everywhere) -‐can take photos, videos, provide entertainment, like music, and connect to the internet
Handphone (con)nued)
• Disadvantages: -‐disturb us on our studies and works
-‐people spend lots and lots of money
buying the latest model to get updated
-‐easily broken, so can be expensive
-‐some people say that it can cause harmful
radia)ons if used too oOen.
GPS (Global Posi)oning System)
• Advantages: -‐Can be used for naviga)on in car or during
hiking, so people don’t need to worry about
geRng lost.
-‐Allow us to search local area for nearby
hotels, restaurants, or gas sta)ons.
GPS (Con)nued)
• Disadvantages: -‐It can fail if some building block the satellite signal, preven)ng the GPS from receiving posi)on updates or the GPS baSery dies. -‐Its signal can be inaccurate because buildings or trees can deflect the signal causing the posi)on in GPS to move. Storms or rain can also deflect the signal.
iPad
• Advantages: -‐it can play videos, photos, allows us to access and view changes in social networks, read eBooks, throwing million applica)ons, games, play music, keep up to date our agenda, make notes, access to Google maps and many more things. -‐It is lightweight, compact and offers a unique work flow.
iPad (Con)nued)
• Disadvantages: -‐the lack of USB ports to connect external
devices or a Web camera that allows us to
make video calls
-‐iPad incompa)bility with the Flash plaZorm
-‐the lack of a mul)tasking environment
(cannot play music while surfing Internet)
TV (Television) • Advantages: -‐it keeps us informed of all current affairs in the world Events through TV are more vivid than those through books and magazines. -‐helps us enrich our spiritual lives. Our knowledge is broadened in many ways. Through language teaching programs, we can learn the language we like such as: English, French, German, Chinese, Japanese and so on. We can become skilful and clever at doing jobs, making cakes or arranging flowers through prac)cal courses taught on television.
TV (Con)nued) • Disadvantages: -‐It viewers gradually become passive in their ac)on. It may be a splendid media of communica)on, but it prevents us from communica)ng with each other. It separates us from the real world. -‐Their viewers from all ages get addicted and so neglect every work that they need to do. -‐it encourages them to commit crimes from TV channels that talk about violence, sadism, rape or murder
Radio • Advantages: -‐reach specific audiences through specialized programming, it can also be adapted for different parts of the country and can reach people at different )mes of the day. -‐radio )me slots provides the best audience for many adver)sers. -‐the least expensive of all other media because air)me costs are low, extensive repe))on is possible.
Radio (Con)nued)
• Disadvantages: -‐it relies solely on audio, which means that it has to work twice as hard to grab and hold the listener's aSen)on. -‐Commercial radio programming decisions are based on audience popularity, however, and entertainment value is the primary considera)on in most cases.
Computer • Advantages: -‐It can store large amount of facts, instruc)ons and informa)on.
-‐It can process data with accuracy at a very high speed (reaching up to 50 million opera)ons per second).
-‐It can repeat opera)ons in exactly the same way over long period of )me.
-‐It is capable of execu)ng instruc)ons on its own aOer the data and program have been fed into its memory.
-‐It can communicate with the operator.
Computer (Con)nued) • Disadvantages: -‐can only perform opera)ons programmed or instructed by a person.
-‐subject to occasional breakdown or malfunc)on. -‐Its capability to perform logical opera)ons depends on the choice prepared by the programmer.
-‐cannot correct wrong instruc)ons by itself. -‐some people believe that it can cause radia)ons if used con)nuously
-‐Damage eyes if used for few hours without break at all
Fax Machine
• Advantages: -‐Important for receiving document as soon as possible and if it is a paper that can’t easily be sent through email.
-‐Cheaper, instead of shipping documents and pay for the shipping, documents can be sent directly using fax.
-‐Can turn computer into fax machines by using soOware called efax.
Fax Machine (Con)nued)
• Disadvantages: -‐Using efax needs internet connec)on.
-‐Needs someone to receive the document and also check if the printed document will be alright or not.
DVR (Digital Video Recorder)
• Advantages -‐Can record certain TV shows with the )me limit depends on the size of the DVR’s hard drive.
-‐Pause and rewind live TV programs -‐Skip commercial ads in TV, replay TV program scenes and freeze the TV screen.
-‐User can record one TV channel while watching another TV channel at the same )me or watching one recorded TV channel while recording 2 other TV channel. This is called dual tuner models.
DVR (Con)nued)
• Disadvantages -‐can only watch recorded programs on TV if the TV is connected to the DVR.
-‐Hard drive could crash and delete every recorded TV channel
-‐DVR doesn’t support HDTV, and even though it can record HDTV channel, it’ll s)ll display the channel in standard display
Headphones
• Advantages -‐Block outside sounds, so nothing can disturb you from listening music, video, etc
-‐Won’t disturb other people because the only one that can hear the sound is the person that wears it.
-‐BeSer sound than earphone
Headphones (Con)nued)
• Disadvantages -‐Damage the users’ ears if wore con)nuously
-‐Quite heavy and big compared to earphone
-‐More expensive than earphone
Mouse (for computers or laptops)
• Advantages -‐More flexible than using arrows on keyboard or track pad, user can also adjust the speed of the cursor. It’s also useful for many computer games that need responsive and accurate cursor.
-‐Can be installed without any installa)on soOware
Mouse (Con)nued)
• Disadvantages -‐Need flat surfaces for this to be func)onal
-‐Can lead to wrist injuries because people might use it in a wrong way.
Services
• Social networking • E-‐mail (Electronic mail)
• RSS feed (Really Simple Syndicate feed)
• VOIP (Voice Over Internet Protocol) • Satellite communica)on services
Social Networking
• Advantages -‐Excellent way to keep in touch with friends and family
-‐Almost all employers search for poten)al candidates through professional networking websites.
-‐See photos of your travelling des)na)on from Flickr, ShuSerfly, Snapfish, etc before you planned to go to there.
-‐Ask friends about loca)on of places through TwiSer, Facebook, etc
Social Networking (Con)nued) • Disadvantages -‐Some people take advantage of the anonymity the internet can provide and resort to wri)ng about or uploading unnecessary content (for example pornography)
-‐Photo that get uploaded and shared publicly can be seen by many people and some of them can morphed the photo and uploaded as a joke
-‐ Private informa)on like job, address, etc, can be known easily and not become private anymore.
-‐Teenagers are in danger because they didn’t realize that the strangers they talked in social networking sites are dangerous
E-‐mail (Electronic mail)
• Advantages -‐Cheap (only need internet connec)on)
-‐Easy to use, if it’s already set up, sending and receiving e-‐mail is very easy
-‐Fast, in a maSer of seconds, the mail can be sent
-‐Saving environment, since it doesn’t use paper, use electricity but not much
-‐Easy to organize mail unlike paper-‐based mail
E-‐mail (Con)nued)
• Disadvantages -‐Lacks personal touch, so wri)ng a leSer to someone won’t impress the person as much as the paper-‐based one.
-‐Pressure to reply, there is some feeling of needing to reply every message that you get from someone else
-‐It can contain viruses -‐Spam cannot be avoided
RSS feed (Really Simple Syndicate feed)
• Advantages -‐It gives you the latest updates. -‐It gives the power of subscrip)on to the user. -‐It is spam free. -‐It can be used as an adver)sing or marke)ng tool.
-‐Unsubscribing is hassle-‐free. -‐It saves on surfing )me.
RSS feed (Con)nued)
• Disadvantages -‐Some users prefer receiving email updates over an RSS feed.
-‐Graphics and photos do not appear in all RSS feeds.
-‐The iden)ty of the source website can be confusing.
-‐Publishers cannot determine how many users are subscribed to their feed and the frequency of their visits.
VOIP (Voice Over Internet Protocol)
• Advantages -‐Cheap for local, long distance and interna)onal calls than tradi)onal phone service
-‐some providers like Skype offers free PC-‐to-‐PC calls using their soOware.
-‐provides features that are usually not available with tradi)onal phone service, such as virtual phone number, you can choose a phone number with area code different from where you reside.
-‐Mobility and portability. You can use it anywhere with broadband connec)on. You only need laptop and headset to do that.
VOIP (Con)nued)
• Disadvantages -‐It won’t work during power outages or when the internet connec)on is down
-‐Call quality is affected by the quality of broadband connec)on and the performance of your laptop or computer.
Satellite Communica)on Services • Advantages -‐helpful for the people staying in remote areas, as this
service covers the long distance transmissions being very powerful in sending and receiving the signals.
-‐helpful for the department of defense, where the people on the fields cannot use the wired services every )me.
-‐helpful during the )me of natural disasters as the wired services have large chances of failing, but the satellite communica)on being absolutely wireless and working through the signals from the satellites above, this service can never fail.
-‐ it include the services like voice calling, video calling, radio, television channels, internet, fax, etc.
Satellite Communica)on Services (Con)nued)
• Disadvantages -‐expensive to customer because the provider needs expensive cost to maintain and launches the satellite.
-‐Unreliable because satellite failure can occur. -‐Signal delay can happen because satellites are posi)oned so they rotate around the earth at the same rota)on of the earth. But the satellites’ orbit is far from the earth, so slight delay occurs. This can cause confusion during phone calls, can’t be used for watching TV, and real-‐)me applicants work improperly.