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5tons.PopuIa r Mechani cs,March 1949VocabularyPronunciation-edÍormof verbsandwordswithsilentIettersCollocationsI Collocations are words which are often used together.The verbs in column A are used in computing. Matchthem with an appropriate noun from column B.EXAMPLEt f) tisten to words 1-15used in this book.Put them inthe correctcolumns of the table.download +picturesAclick oncalculatedownloaddisplaycreatescroll up / downsurfselectfromThe -edform of verbs is pronounced in three ways:/t//d//rd/Bamenuan icona paSepicturestheWebcostsa new documentinformation1 constructed6 finished11 planned2 controlled7 integrated12 produced3 customized8 invented13 reflected4 damaged9 mixed1,4 searched5 disabledlÍ'/10 operated/dt15 workedtdtUse the phrases from I to fill the gaps in the sentences.1 FIat screens around the airport displayon all arrivals and departures.Click on the presentation.for PowerPoint to prepare a3 You can download nfrom your camera.Spreadsheetsare used to calculate-.5 Scroll down the information you need.until vou find theI normally spending at least one hour a day surfingShe createdupdates.to keep track of softwareYou can selectfrom the applÍcationyou need.to choosewhich2Q Nowlisten and checkyour answers.3Can you work out a rule to help you decide how topronounce other -edforms?4 Words 1-7used in this book contain silent letters.Crossout the silent letters.ExAMPLE scouMdesignI listening4 pneumatic2 might5 should3 modellÍng6 vehicle7 would5 Q Nowlisten and checkyour answers.I n f o r m a t i otne c h n o l o g y9 lChecklistAssessyour progressin this unit.Tick(/)the statementswhich aretrue.I know keytermsfor computeruse int h e c a ri n d u s t r yI can usethe PastPassiveI know how to pronounceth e -edformof verbsand wordswith silentlettersSpeakingComputerperipheralsWork in pairs,A and B.Each of you has pictures of fourcomputer peripherals.
Find out which peripherals yourpartner has by asking questÍons.Don,t ask directly forthe names of the peripherals.KeywordsEXAMPLEABABWhat shape Ísit?It'ssquare.Does Íthave a back and front?Yes,ítdoes.StudentAGo to p.111.Student BGo to p.112.Adjectivescustomizeds i m ul a t e dt h r e e - d i m e n s i o n(a3l - D )t w o - d i m e n s i o n a( 2l -D)When you have identÍfiedthe peripherals,togetherdecide whether they are input or output devices.WebquestFind out about the five fastest supercomputersin theworld and complete the table.Compare your answerswith others in your class.OrderTypeorname2nd3rdThis site may help:www.top500.org5peedM y r e a d i n ga n d l i s t e n i n ga r eg o o denoughto understandmost ofeach texti n t h i su n i tMakerLocationNounsa s s e m b l yl i n eCADCAMcr McNcdefectm a c h i n et o o lmachiningperipheralsoftwaresuppliesVerbinspectN o t eh e r ea n y t h i n ga b o u th o w E n g l i s hi s u s e di n t e c h n o l o g y t h aits n e w t o y o u .9 2 U n i t1 3Switch onWork in small groups.List as many ways as you can tosend and receivemessages.EXAMPLE7 by phone2 writingIdentify the devices used in telecommunications inpictures A-F.3 Work in pairs.Choose one device each and explain toyour partner what it does.EXAMPLEA I' IIchoosethe space satellite.B OK.Whatdoesitdo?A Itfollows an orbit in space.Some satelliteshelpcommunicationand othersprovideinformation...-T e l e c o m m u n i c a t i o 9n 3sI nt h i s u n i to k e y t e r m si n t e l e c o m m u n i c a t i o n so PastSimolev PresentPerfecto l i s t e n i n ga n d r e a d i n gf o r d e t a i lo m a k i n gs i m p l ee x p l a n a t i o n so hearingthe difference:PastSimplev PresentPerfectIt'smyiobf) ListentoToddMcArthur, aTelecommunicationsTechnician.Note thefollowing things.I the number of years he has worked for his company2 as many items of telecommunicationsequipmentas you can3 as many country names as you can4 the meaning of VolPQ tisten again and answer the questions.1 Where did he first learn about telecommunications?Name a changehe has experiencedintelecommunications.Why is his job now much more about braÍnthanmuscle?4 W h a t d o e sh e l i k e m o s t a b o u th i s j o b ?What doeshe not like?o LanguaBespotPastSimptev PresentPerfectStudy these examples fro m lt's my job.
Why is thePast Simple used for sentences1-3 and the PresentPerfectfor sentences4-6?7 I was in the army for four years.2 Ijoined when I left school.3 I travelledquite a lot.4 I,vebeen with the companyfor eÍghtyears.5 I've been to Norway,Kenya,and Belize.6 I'veseenquiteafew changesin phone systems.We use the Past Simplefor things that happenedat a particular time in the past or during a period thatendedínthe past:I travelled a lot when I was in the army.We use the Present Perfectto talk about pastexperiencesbut not when they happened:I've been to the USA.We use the Present Perfectfor actions whichhappenedduring a periodfrom the past to the present:He's worked as a technicianfor eightyears.(He'sstill atechnician.)We often start a topic using the PresentPerfectandthen switch to the Past Simple:A Have you ever been to Norway?B Yes,I went there in 2001.)) Go to Grammar reference p.121ICompletethe text about developmentsin radio andtelevision.Put the verbs in bracketsin the correctform:Past Simple or Present Perfect.In just over a hundred years,radio -1(develop)into a major form of entertainment and'z(invent)acommunication.
Marconiwirelesstelegraphsystem in 1896.This(be)the birth of radio.Voice transmission(start)in 1909 following the invention of the valve.(make)Ítpossible toSemiconductors-'develop much smaller,portable radios.Theintroduction in recent years of digital radiosu(allow)us to enjoy much better soundquality.(be)many changes in televisionThere -'(start)daily TVtoo.ln the UK, the BBC -'broadcastsin 1936.Colourbroadcasts-'(begin)in the late 1960s.Sincethe 1970ssatellite'o(allow) viewers a widerbroadcastingchoice of programmes.The recent introduction ofdigital TV" (mean)better picture andnowsound quality. Manufacturers (develop)whichentertainmentsystems"include television,radio,DVD recorder/ player,andcomputer.TheInternet13(make)it possible to enjoyradio and televisionfrom around theworld on our PCs.9 4 U n i t1 3j GadgetboxJaoan'sDoCoMonetworkallowsusersof 36 mobilesto usetheir phonesas electronicwallets.Thephoneactsas a creditcard.Whenthe phoneispassedovera speciaI reader,it can payfor th i ngs a nd a llow moneyto besomewithdrawnfrom a cashmachine.As well as passwordprotection,phonesusingthe systemhavea fingerprintscanner.W h y d o y o ut h i n ka f i n g e r p r i nstc a n n e irs u s e f u l w i t ht h i ss y s t e m T2 Choose the correct alternative.InterviewerHow long haveyou been / wereyoul aTelecommunications Technician?ToddAbout ten ye ars.Ihave traÍned/ traÍned2in Signals when I was in the army.InterviewerHow long haveyou been / wereyou3 inthe army?ToddI have served/ servedafor four years.ThenIhavejoined / joÍned5thiscompany abouteight years ago.InterviewerHave you seen/ Did you see6manychanges during this time?ToddYes,we ve replaced / we replacedl copperIines with fibre-optic cables andwe'veintroduced/ we introducedsVolP phonesvstems.PronunciationPastSimplev PresentPerfectSpeakingMobile phonesWork in pairs,A and B.
Each of you has informationabout a mobile phone. Find out the information youneed to complete this table by asking each other.Student AGo to p.113.Student BMakeHPModeli P a qh w 6 5 1 0M o b i l eMessengerKeyboardtypefullQwertyScreen3 inch,64KSoftwareW i n d o w sM o b i l e2 0 0 3OtherfeaturesC P Ss a t e l l i t enavigationf) Stuay tnese pairs of sentences.You are going to hearone of each pair.
TÍck(/) the one you hear.BIuetoothvoicecontrol,SMS( t e x t ) a n dM M S(picture)messaging1 a They've spent time in the army.b Theyspenttime inthe army.2 a I'vetextedhimaninvitation.b I texted him an invitation.instantmessagingEmail3 a He faxed me a reply.b He's faxed me a reply.4 a Todd'sphoned the office.b Toddphonedtheoffice.5 a She emailed me twice.b She'semailed metwice.=oo G)ÜlIT e l e c o m m u n i c a t i o n9s5Firsttelegraphmessage,l844:WhathathCodwrought?('WhathasGoddone?')SamuelMorseFirsttelephonemessage,1876:MrWatson,comehere,Iwantyou.AlexanderGrahamBellFirstemailmessage,197l:testsignal,notpreserved.ReadingVolP phonesystemsI Work in pairs and answerthe questions.Then readthetext and checkyour answers.1 What doesVoIPstandfor?2 What is apacket?3 What is awirelesshotspot?HowVoIPphonesystemsworkVoIP(VoiceoverInternetProtocol)phonesystemsworkby sendingdatavia the Internetin tiny packets.This iscalledpacketswitching.It works like this:1 Yourvoice signal,which is analogue,is convertedinto digital data.Ifyou havea standardphone,youneed an extrapieceof hardwareto do this calledanATA (Analoguetelephoneadaptor).Ifyou havean IPphone,it producesa digital signal soyou don't needan adaptor.You can alsouse your PC and amicrophoneas a telephone.2 Thesendingcomputerusessoftwaretocompressthe digital data,much like MP3 files.3 The data is dividedinto packets,eachone 30millisecondslong.4 The packetsare sentto a routerwhich decidesthebestpath throughthe Internetfor eachpacket.Ttreywill travel by many different paths.They will aniveat differenttimes and somemay evenbe lost.(5 Thereceivingcomputerusesspecialsoftwaretostorethe packetsand put them in the right order.Becausethe packetsareso smaU,you won't hearthedifferenceif somearelost.6 The data is convertedbackto voice and playedthroughyour standardphone,IPphone,orPCheadphones.If you have a wirelessVoIPhandset,you can make andreceivecalls anywherenear awireless hotspot.Somemobile phonesaredual-mode.You can use a mobilephonenetwork or wirelessVoIP,dependingwhere youaÍe.Put the stepsin the correctorderto make a flowchartshowinghowthis typeof VoIPphonesystemworks.a Thepacketsaresenttoarouter.b The digital datais compressedby the sendingcomputer.c Thedatais convertedbackto voice.d Thereceivingcomputerputs the packetsbacktogetheragain.e Thevoice signal is convertedto digital.f Thedigital data is diüded into very small packets.g Theroutersendseachpacketthroughthe Internetbythe bestavaiiablepath.e73_57_2_4_69 6 U n i t1 3(adj)describinggeosynchronouss a t e l l i t ews h i c ho r b i ta t t h e s a m espeedas the earth but may not beabovethe equator.Some havefi gure-of-eightorbits.CustomercareWebquestExplainingin simpletermsSatellitecommunciationssystemsI Studythe diagrams which explain geostationaryorbit.Then answer questions 1-4.SPOT BEAM\\il\$T"lV,\EO-UATORSATELLITEGEOSTATIONARY ORBITsarrrurn 1I tike Todd McArthur, you may have to explain to clientsin simple terms a process,or what a device is for andhow it works.
Work in paÍrs,A and B. Find out moreabout your device or process,then explain it in simpleterms to your partner.Student Athe difference between analog anddigital signalsStudent Bthe difference between DVDs and CDsUsefullanguageBasÍcally...I n g e n e r a l. . .Toput it símply...I n v e r ys i m p l e t e r m s . .
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