1 00:00:00,000 --> 00:00:03,888 >> [Daqq ta mużika THEME] 2 00:00:03,888 --> 00:00:17,705 3 00:00:17,705 --> 00:00:18,830 DAVID J Malan: Hello dinja. 4 00:00:18,830 --> 00:00:20,640 Dan huwa CS50Live. 5 00:00:20,640 --> 00:00:23,900 Allura huwa inġieb għall-attenzjoni tiegħi li matul l-aħħar ftit episodji 6 00:00:23,900 --> 00:00:28,370 I jista 'jkollhom qal ftit affarijiet li huma żbaljati. 7 00:00:28,370 --> 00:00:31,400 Ukoll, fost l-ewwel per eżempju, kienet li din il-websajt popolari 8 00:00:31,400 --> 00:00:33,233 aħna kont qed tuża għall- id-diskussjonijiet korsijiet 9 00:00:33,233 --> 00:00:34,710 mhuwiex fil-fatt imsejħa Redder. 10 00:00:34,710 --> 00:00:36,940 Huwa apparentement, kienet Reddit. 11 00:00:36,940 --> 00:00:41,150 >> Sadanittant, huwa l-każ li għal pjuttost xi żmien l-Istati Uniti kienet qed tuża 12 00:00:41,150 --> 00:00:45,700 00000000 biex jipproteġu missili tagħha. 13 00:00:45,700 --> 00:00:50,650 Madankollu dawk il-missili kienu nukleari, u mhux apparentement, "nuke-you-ler." 14 00:00:50,650 --> 00:00:51,300 >> Sadanittant. 15 00:00:51,300 --> 00:00:52,050 I love you. 16 00:00:52,050 --> 00:00:55,820 Dan huwa tabilħaqq bħalissa, allegatament, l-password aktar popolari 17 00:00:55,820 --> 00:00:57,200 dritt issa għall-persuni li tkun qed tuża. 18 00:00:57,200 --> 00:01:01,140 Iżda dan - jekk aħna zoom - hija mhux fil-fatt kif inti tagħmel qalb. 19 00:01:01,140 --> 00:01:05,560 >> Fl-aħħar nett, stess Shelley Westover CS50, l min inti tista 'tiftakar minn dawn films 20 00:01:05,560 --> 00:01:08,420 dan wieħed, innota li hi ma tkunx fil-fatt 21 00:01:08,420 --> 00:01:11,860 kamera "operater" iżda operatur camera. 22 00:01:11,860 --> 00:01:14,750 Issa taħdit ta 'camera operaturi, it-tim 23 00:01:14,750 --> 00:01:17,526 tkun graciously permessi me li jissellef dan il-kamera llum, 24 00:01:17,526 --> 00:01:19,400 sabiex inkunu tista 'tieħu tħares lejn dak li attwalment 25 00:01:19,400 --> 00:01:21,590 għaddej dan il-ħin wara l-kwinti. 26 00:01:21,590 --> 00:01:26,090 Mela jekk inti se, immorru quddiem u ħu ġita tal-istudjo? 27 00:01:26,090 --> 00:01:29,880 Aħna qiegħdin hawnhekk fil Hauser beautiful Studio, fil Widener Librerija. 28 00:01:29,880 --> 00:01:32,840 Fl-isfond hawnhekk huwa dan iskrin aħdar, inkella magħrufa 29 00:01:32,840 --> 00:01:35,660 bħala chroma-ċavetta, jew ħajt cyc fiżikament. 30 00:01:35,660 --> 00:01:37,410 U fil-fatt, jekk I walk mill-qrib dan, 31 00:01:37,410 --> 00:01:41,920 avviż kif il-ballun għandha kurva żgħir li, iktar milli minn angolu sharp normali. 32 00:01:41,920 --> 00:01:43,930 Li jippermetti li jżommu dellijiet off tat-truf, 33 00:01:43,930 --> 00:01:46,760 u jippermetti wkoll li nagħmlu żgur li nistgħu jissovvrapponu 34 00:01:46,760 --> 00:01:49,100 kważi xejn aħna tixtieq sbieħ u nadif. 35 00:01:49,100 --> 00:01:51,390 >> Issa up hawnhekk huwa sħiħa mazz ta 'dwal kontrollati 36 00:01:51,390 --> 00:01:55,670 minn bord prinċipali ta 'swiċċijiet li Ser naraw fil biss ftit. 37 00:01:55,670 --> 00:01:59,560 Up hawnhekk hija dawl LED hekk imsejħa Barn Bibien fuqha. 38 00:01:59,560 --> 00:02:01,550 Dan huwa dak li jitfa ħafna dawl dirett. 39 00:02:01,550 --> 00:02:03,590 Really tagħti me glow tiegħi matul l-ispettaklu. 40 00:02:03,590 --> 00:02:07,430 U allura hawn għandna fluworexxenti dawl, li jitfa dawl artab. 41 00:02:07,430 --> 00:02:09,440 Issa kemm minn dawn huma orħos biex joperaw, 42 00:02:09,440 --> 00:02:12,330 u ħafna cooler biex topera mill- bozoz inkandexxenti aktar tradizzjonali 43 00:02:12,330 --> 00:02:14,750 li ħafna folks xorta għandhom tendenza li jkollhom fid-djar tagħhom. 44 00:02:14,750 --> 00:02:16,864 Issa jekk ngħaddu madwar hawn, tkun taf tara dak li nara. 45 00:02:16,864 --> 00:02:19,280 Allura aħna għandna koppja ta 'tagħna cameras hawn fuq, li waħda minnhom 46 00:02:19,280 --> 00:02:20,840 għandha teleprompter fuqha. 47 00:02:20,840 --> 00:02:23,520 >> Aħna fil-fatt ma verament użu teleprompter fl CS50Live, 48 00:02:23,520 --> 00:02:26,800 iżda għall-xorts, kontra dawk backdrops abjad li inti tista 'recall, 49 00:02:26,800 --> 00:02:28,180 aħna fil-fatt jużawhom pjuttost ftit. 50 00:02:28,180 --> 00:02:31,013 Infiq pjuttost ftit ta 'żmien fil- javvanzaw scripting-materjal sabiex 51 00:02:31,013 --> 00:02:32,240 biex tiksbu biss id-dritt. 52 00:02:32,240 --> 00:02:36,264 >> Issa hawn fuq, inti ser attwalment tara up camera fuq il-limitu. 53 00:02:36,264 --> 00:02:37,180 Ejja zoom fl fuq dak. 54 00:02:37,180 --> 00:02:39,430 Dik hija l-bump hekk imsejħa cam li gets dawk shots 55 00:02:39,430 --> 00:02:42,310 li tara fil-bidu nett jew l-aħħar nett tal CS50Live. 56 00:02:42,310 --> 00:02:43,950 U huwa diffiċli li tara fil l-dawl up hemm, 57 00:02:43,950 --> 00:02:45,824 iżda huwa attwalment mdendla rasu 'l isfel, u aħna 58 00:02:45,824 --> 00:02:50,270 jistgħu jiffissaw fir software wara l- fatt mill flipping vertikalment. 59 00:02:50,270 --> 00:02:54,600 >> Issa - hi [? Andrea -?] Hawn fuq, ejja fuq ras għal dik bord tad-dawl 60 00:02:54,600 --> 00:02:56,180 li semmejt qabel. 61 00:02:56,180 --> 00:02:58,390 Dan il-bord tad-dawl għandu mazz sħiħ ta 'swiċċijiet, 62 00:02:58,390 --> 00:03:01,430 u huma mibegħda meta I attwalment jagħmlu dan, 63 00:03:01,430 --> 00:03:05,600 iżda nistgħu ngħidu tarmi xi dwal up u 'l isfel hawn. 64 00:03:05,600 --> 00:03:09,160 I ma tistax pjuttost tara l-effett, imma aħna qed tip ta 'wreaking havoc fuq kameras tagħna 65 00:03:09,160 --> 00:03:09,660 dritt issa. 66 00:03:09,660 --> 00:03:12,465 Imma ejja jiffissaw dan. 67 00:03:12,465 --> 00:03:14,810 Oh boy, ejja jimxu fuq. 68 00:03:14,810 --> 00:03:18,910 >> Allura hawnhekk huwa l-closet fil- li kollha tal-wajers Studios 69 00:03:18,910 --> 00:03:19,850 huma finalment jgħaddu. 70 00:03:19,850 --> 00:03:22,016 U dan huwa tip ta 'l- imħuħ wara l-operazzjoni, 71 00:03:22,016 --> 00:03:23,710 wara l-kwinti, fannijiet enormi fil hawn. 72 00:03:23,710 --> 00:03:27,972 Fil-fatt, jekk I dgħif fil inti tista ' tisma pjuttost ftit ta 'ħoss. 73 00:03:27,972 --> 00:03:30,430 Allura hemm attwalment pjuttost daqsxejn ta 'insulazzjoni fuq dawn ħajt 74 00:03:30,430 --> 00:03:33,054 sabiex iżżomm dak l-istorbju meta aħna fil-fatt shut-bibien. 75 00:03:33,054 --> 00:03:36,870 Iżda mod up hemm inti tista 'tara l- cables ġejjin fi u barra mill-closet. 76 00:03:36,870 --> 00:03:39,070 U hawn inti tista 'tara kopja tal-teleprompter 77 00:03:39,070 --> 00:03:41,370 li rajna ftit mument ilu. 78 00:03:41,370 --> 00:03:44,070 >> Alright, ejja ras fil l-hekk imsejħa kamra tal-kontroll. 79 00:03:44,070 --> 00:03:46,770 Allura hawn, I għadhom ma pjuttost jifhmu dan wieħed, 80 00:03:46,770 --> 00:03:49,300 dan huwa fejn inżommu tagħna flammables apparentament. 81 00:03:49,300 --> 00:03:51,760 Imma hawn għandna mazz sħiħ ta 'workstations 82 00:03:51,760 --> 00:03:54,750 fejn tim tal-CS50 u timijiet oħra HarvardX jaħdmu. 83 00:03:54,750 --> 00:03:57,510 U hawn aħna għandna stazzjon awdjo tagħna. 84 00:03:57,510 --> 00:03:59,580 Ejja tagħti ħarsa. 85 00:03:59,580 --> 00:04:01,140 Hey Patrick. 86 00:04:01,140 --> 00:04:03,820 Allura hawnhekk għandna jerġa 'jkollhom mazz sħiħ ta 'dials 87 00:04:03,820 --> 00:04:06,430 nistgħu jimxu u 'l isfel biex attwalment biddilx il-livelli. 88 00:04:06,430 --> 00:04:07,264 Dan iż-żmien għall-awdjo. 89 00:04:07,264 --> 00:04:10,346 U fil-fatt, jekk nagħmel dan hawnhekk - jien ser bil-mod jitbaxxew din audio 90 00:04:10,346 --> 00:04:13,800 livell, u jien ser iżommu jitkellem fil- dan il-leħen tas-soltu ta 'minjiera hawn fil Hauser 91 00:04:13,800 --> 00:04:16,790 Studio għall CS50 ħajjin, u f'xi punt int mhux se tkun - 92 00:04:16,790 --> 00:04:19,200 >> [VOLUM Tnaqqas SAL vuċi  Inaudible.] 93 00:04:19,200 --> 00:04:22,054 >> Issa jekk I tqajjem lura up inti ser tibda tisma 'vuċi tiegħi mill-ġdid. 94 00:04:22,054 --> 00:04:23,970 Issa, inti ma għandekx tagħmel dak kollu manwalment. 95 00:04:23,970 --> 00:04:25,178 Fil-fatt għandna xi presets. 96 00:04:25,178 --> 00:04:28,407 Mela jekk jien jmorru fuq here għas-Saff menu, I jistgħu attwalment toggle bejn l-1 97 00:04:28,407 --> 00:04:31,436 fil-16 u 7 32, u tkun taf tara dan iseħħ. 98 00:04:31,436 --> 00:04:32,310 Attwalment pretty pulita. 99 00:04:32,310 --> 00:04:35,240 I tagħmel dan pjuttost ftit kif ukoll - jaraw. 100 00:04:35,240 --> 00:04:39,070 >> Xorta, ejja jimxu fuq hawn u tkun taf tara bank sħiħa ta 'hard drives, 101 00:04:39,070 --> 00:04:39,570 verament. 102 00:04:39,570 --> 00:04:42,830 Dawn huma l-kollha SSD li inti tista ' jkollhom fil-laptops lum, u anki 103 00:04:42,830 --> 00:04:43,876 xi wħud fil desktops lum. 104 00:04:43,876 --> 00:04:46,000 U dawn jaħżnu l-affarijiet bħall- dan - li huwa attwalment 105 00:04:46,000 --> 00:04:49,445 biss hard drive, li huwa madwar 500 gigs fil SSD. 106 00:04:49,445 --> 00:04:51,372 U tista 'tara l- interface hemm via li 107 00:04:51,372 --> 00:04:52,830 li jgħaqqad lill-interjuri ta 'dak. 108 00:04:52,830 --> 00:04:55,390 Dan huwa fejn kollha ta 'tagħna footage huwa finalment maħżun, 109 00:04:55,390 --> 00:04:59,110 minn kameras waħda jew aktar li aħna jista 'jkun bl-użu għal rimja partikolari. 110 00:04:59,110 --> 00:05:04,050 >> Issa hawn fuq - Oh, Hey Ramon. 111 00:05:04,050 --> 00:05:04,776 Grazzi. 112 00:05:04,776 --> 00:05:06,900 Tal Ramon qatt verament mogħtija me ħafna attenzjoni hemm, 113 00:05:06,900 --> 00:05:08,170 iżda aħna ser biss jimxu fuq. 114 00:05:08,170 --> 00:05:11,570 Jekk Ramon - jekk I tista 'tieħu ħarsa fuq hawnhekk, għandna mazz sħiħ ta 'buttuni 115 00:05:11,570 --> 00:05:12,819 li nistgħu tilgħab ma ukoll. 116 00:05:12,819 --> 00:05:16,500 U sadanittant hemm kollu mazz ta 'displays up here 117 00:05:16,500 --> 00:05:18,780 fuq żewġ, big screens enormi. 118 00:05:18,780 --> 00:05:22,000 U dan huwa verament bħall- interjuri ta 'studio televiżiv. 119 00:05:22,000 --> 00:05:24,020 Kollha tal-sinjali vidjo jaqgħu fil hawn, u dak 120 00:05:24,020 --> 00:05:26,940 aħna kapaċi jagħmlu billi tmiss il- swiċċijiet u dials huwa attwalment 121 00:05:26,940 --> 00:05:28,385 jipproduċu juru f'ħin reali. 122 00:05:28,385 --> 00:05:30,510 Allura per eżempju, għandna dan throttle ftit hawn, 123 00:05:30,510 --> 00:05:31,760 bħal inti tista 'tara fi pjan. 124 00:05:31,760 --> 00:05:35,740 Jekk nibda biex jiksbu din lura, l-avviż dak li jiġri fuq l-żewġ xbihat 125 00:05:35,740 --> 00:05:36,800 up hemm. 126 00:05:36,800 --> 00:05:40,310 Fading bejn it-tnejn, u għalhekk konna marret minn waħda għall-oħra. 127 00:05:40,310 --> 00:05:43,490 U jekk I push li back up, issa konna ltqajna lura l-immaġini oriġinali. 128 00:05:43,490 --> 00:05:46,570 >> Sadanittant dan joystick fuq hawn, bħal qodma arcade console, 129 00:05:46,570 --> 00:05:49,170 jippermetti li jagħmlu dan ma 'dak cam bump. 130 00:05:49,170 --> 00:05:51,080 U hemm immorru, hemm immorru, hemm immorru. 131 00:05:51,080 --> 00:05:54,992 U issa għandna fiss li - pretty ħafna tajba biżżejjed 132 00:05:54,992 --> 00:05:56,200 għall-finijiet ta 'l-ispettaklu. 133 00:05:56,200 --> 00:05:59,710 >> Issa finalment - sorry Ramon - aħna wkoll xi buttuni hawn. 134 00:05:59,710 --> 00:06:04,280 DDR2, ta 'logħob favorit tiegħi forsi, u jekk I hit dan, aħna issa jiksbu dan l-effett. 135 00:06:04,280 --> 00:06:07,190 Inti tista 'tfakkar li minn episodju tnejn CS50Live. 136 00:06:07,190 --> 00:06:11,430 Jekk aħna timbotta fuq titolu, dan huwa dak li aħna tista 'tolqot jekk xejn fil-fatt tmur ħażin, 137 00:06:11,430 --> 00:06:12,890 aħna jkollna l-iskrin hemm. 138 00:06:12,890 --> 00:06:19,620 U issa fl-aħħar, naħseb li huwa żmien għal 60 sekonda ta 'Rob. 139 00:06:19,620 --> 00:06:21,520 Oh, iben ta '- 140 00:06:21,520 --> 00:06:24,520 >> [BASS GUITAR jilgħab] 141 00:06:24,520 --> 00:06:29,632 142 00:06:29,632 --> 00:06:30,340 ROB: Oh, come on! 143 00:06:30,340 --> 00:06:31,810 Just użu xi video annimali! 144 00:06:31,810 --> 00:06:34,780 >> [MUSIC Plays] 145 00:06:34,780 --> 00:06:46,030 146 00:06:46,030 --> 00:06:47,300 >> [Mara TITKELLEM Ġappuniż] 147 00:06:47,300 --> 00:07:09,150 148 00:07:09,150 --> 00:07:11,410 >> Riċentement fl-aħbarijiet kienet artiklu dwar CS50 149 00:07:11,410 --> 00:07:13,500 fil-websajt popolari magħrufa bħala Hacker Life. 150 00:07:13,500 --> 00:07:16,990 Issa waħda mill-klassi tiegħek, Annabel mill-Awstralja, sab dan l-artikolu 151 00:07:16,990 --> 00:07:18,880 u min-naħa CS50 innifsu. 152 00:07:18,880 --> 00:07:24,035 Hija issa s iskritta fil-klassi u hi tixtieq li jgħidu bonjour. 153 00:07:24,035 --> 00:07:24,910 ANNABEL: Hello dinja. 154 00:07:24,910 --> 00:07:29,020 Jisimni Annabel, u jien minn Queensland, Awstralja. 155 00:07:29,020 --> 00:07:33,430 Ir-raġuni jien tieħu din il-klassi hija minħabba I raw post fuq Hacker Ħajja, 156 00:07:33,430 --> 00:07:37,740 u kien jaf li dan kien l-muftieħ għall- jitnaqqas id-distakk bejn li newbie, 157 00:07:37,740 --> 00:07:40,510 u futur fil-CS. 158 00:07:40,510 --> 00:07:45,320 Teħid dan il-kors se jkun ukoll ta 'pont f'direzzjonijiet ħafna għat-tifel autistic tiegħi 159 00:07:45,320 --> 00:07:48,440 li tant iħobb IT. 160 00:07:48,440 --> 00:07:51,105 Jien ukoll bit-tama li sa l-aħħar li joħolqu 161 00:07:51,105 --> 00:07:54,340 programmi biex jgħinu bint dyslexic tiegħi. 162 00:07:54,340 --> 00:07:56,764 Bħalissa I am accountant, b'interess tqil 163 00:07:56,764 --> 00:08:00,300 fit-teknoloġija, proprjetà immobbli, ġardinaġġ, u l-mużika strumentali. 164 00:08:00,300 --> 00:08:03,133 165 00:08:03,133 --> 00:08:08,098 Jisimni Annabel, u dan huwa CS50. 166 00:08:08,098 --> 00:08:10,500 >> SPEAKER: Ippermettuli li jmiss li tintroduċi Betty, 167 00:08:10,500 --> 00:08:13,057 li jixtieq ukoll jgħidu bonjour. 168 00:08:13,057 --> 00:08:13,890 BETTY: Hello, dinja. 169 00:08:13,890 --> 00:08:16,730 Jisimni Betty, u jien mill-California nofsinhar. 170 00:08:16,730 --> 00:08:19,290 Jien tieħu dan il-kors għaliex is-soċjetà tagħna llum 171 00:08:19,290 --> 00:08:21,910 jidher li tkun immirata lejn programmazzjoni. 172 00:08:21,910 --> 00:08:24,625 Programmazzjoni qed issir essenzjali għall-ħajja tagħna. 173 00:08:24,625 --> 00:08:26,750 U fil-fatt, naħseb li huwa diġà essenzjalment issa, 174 00:08:26,750 --> 00:08:29,800 peress li ħafna mill-affarijiet li aħna użu ikollhom jintegraw programmazzjoni 175 00:08:29,800 --> 00:08:31,840 sabiex għalihom biex jiġu maħluqa. 176 00:08:31,840 --> 00:08:37,012 Bażikament, aħna ser ikunu mmirati lejn futur mimli 177 00:08:37,012 --> 00:08:38,720 mat-teknoloġija, u programmazzjoni li qed jiġri 178 00:08:38,720 --> 00:08:40,909 li jkun parti essenzjali ta 'dik futura. 179 00:08:40,909 --> 00:08:43,909 So I think huwa xi ħaġa dan huwa verament jibred, 180 00:08:43,909 --> 00:08:46,370 u li I għandhom probabbilment tikseb dan it-tagħlim. 181 00:08:46,370 --> 00:08:50,170 So yeah, jien jisimni Betty, u dan huwa CS50. 182 00:08:50,170 --> 00:08:51,920 DAVID J Malan: Isaffru hawnhekk sadanittant, hija 183 00:08:51,920 --> 00:08:55,150 Raja mill-Indja, li għandu gotten hekk mgħaddsa fil CS50 184 00:08:55,150 --> 00:08:58,410 li jidher li kellhom huwa tattooed fuq il-ġilda tiegħu. 185 00:08:58,410 --> 00:08:59,370 >> U issa, tweet. 186 00:08:59,370 --> 00:09:03,280 Dan wieħed minn Carter fil Virginia, li kiteb us ma 'dan - "Consentino u I 187 00:09:03,280 --> 00:09:06,860 qed jagħmlu użu tajjeb ta 'jum borra tiegħi jaraw ġimgħa ta CS50 Harvard 188 00:09:06,860 --> 00:09:09,800 fuq it-TV permezz Chromecast u YouTube. " 189 00:09:09,800 --> 00:09:10,780 Min hu Consentino? 190 00:09:10,780 --> 00:09:13,840 Ukoll, apparentement hu qattus tiegħu, iżda tabilħaqq, isaffru hawn flimkien 191 00:09:13,840 --> 00:09:17,047 saqajn Carter, huwa kbir TV screen fl-isfond. 192 00:09:17,047 --> 00:09:19,130 U apparentement hemm tabilħaqq tuża Chromecast 193 00:09:19,130 --> 00:09:22,937 proġett ġimgħa CS50 tal fuq li t-TV big screen wirelessly. 194 00:09:22,937 --> 00:09:26,020 Issa Chromecast, jekk int ma jkunux familjari, huwa attwalment tip ta 'apparat pulita. 195 00:09:26,020 --> 00:09:29,420 Huwa pjuttost rħas plug li inti tista 'tpoġġi fil-dahar tal-kompjuter tiegħek 196 00:09:29,420 --> 00:09:31,090 fi port HDMI. 197 00:09:31,090 --> 00:09:34,860 Hija għandha Wi-Fi aċċess, u essenzjalment jippermettilek li nixxiegħa wireless 198 00:09:34,860 --> 00:09:38,650 kontenut mill laptop tiegħek fuq TV tiegħek, jew saħansitra l-kontroll TV tiegħek 199 00:09:38,650 --> 00:09:41,894 u download kontenut simili videos direttament miegħu. 200 00:09:41,894 --> 00:09:44,560 U issa nota mill Mohamed, wieħed tal-klassi tiegħek fil-Pakistan, 201 00:09:44,560 --> 00:09:47,620 li riċentament skoprew dan kurżità - apparentament 202 00:09:47,620 --> 00:09:50,060 jekk inti tmur google.com f'okkażjoni u tfittxija 203 00:09:50,060 --> 00:09:53,860 għalija, David J. Malan, apparentement dan Guy taqa up darba awhile. 204 00:09:53,860 --> 00:09:56,830 David H. Malan, li l-apparentement psikoterapista Britanniku li 205 00:09:56,830 --> 00:09:59,041 jistenna ħafna orribbli bħali. 206 00:09:59,041 --> 00:10:01,040 Issa jirriżulta jekk inti ikklikkja din ir-rabta feedback 207 00:10:01,040 --> 00:10:03,600 fil-rokna ta 'isfel tista' attwalment tirrapporta problema, 208 00:10:03,600 --> 00:10:05,170 kif l-affarijiet qed żbaljat li Google. 209 00:10:05,170 --> 00:10:07,560 U let me - peress li aħna huma fuq l-internet 210 00:10:07,560 --> 00:10:10,910 hawn - jekk inti tista 'tgħin Guy out, u attwalment ikklikkja din ir-rabta ħażina up top, 211 00:10:10,910 --> 00:10:14,680 u biss isemmu li David H. Malan ma jkunx fil-fatt David J. Malan. 212 00:10:14,680 --> 00:10:17,550 >> Issa biex ikunu ġusti, hemm probabbilment huwa David H. Malan, 213 00:10:17,550 --> 00:10:19,550 u huwa probabbilment hija Psikoterapista British, 214 00:10:19,550 --> 00:10:21,840 hekk ejja ma jirrappurtawx kull ħaġ'oħra bħala ħażin, 215 00:10:21,840 --> 00:10:25,240 iżda biss li photo għandha probabbilment ġew magħżula algorithmically 216 00:10:25,240 --> 00:10:27,480 b'mod inkorrett mill servers Google. 217 00:10:27,480 --> 00:10:32,179 >> U issa bonjour minn dak tal-CS50 Ħabib, Professur Harry Lewis. 218 00:10:32,179 --> 00:10:34,720 Professur Harry Lewis kien effettivament tiegħi snin professur stess ilu 219 00:10:34,720 --> 00:10:38,170 meta I ħa kors intensiv Fit-teorija ta 'komputazzjoni. 220 00:10:38,170 --> 00:10:42,600 A kors teorija fejn inti tesplora il-limiti fundamentali ta 'komputazzjoni, 221 00:10:42,600 --> 00:10:45,350 u eżattament liema kompjuters tista 'u ma tistax tagħmel. 222 00:10:45,350 --> 00:10:47,910 We reċentement żaret Professur Lewis fl-uffiċċju tiegħu 223 00:10:47,910 --> 00:10:50,665 tagħti ħarsa lejn uħud teknoloġiji passat. 224 00:10:50,665 --> 00:10:53,790 PROFESSUR HARRY LEWIS: Ninsab Harry Lewis, Jien professur tal-Computer Science 225 00:10:53,790 --> 00:10:55,060 hawn fil-Harvard. 226 00:10:55,060 --> 00:11:01,890 Wasalt biex Harvard fl-1964 bħala freshman, u ħlief għal tliet snin 227 00:11:01,890 --> 00:11:04,525 off matul il-Gwerra Vjetnam Stajt ġiet hawn qatt peress. 228 00:11:04,525 --> 00:11:08,870 So I issa ras il-undergraduate Programm fix-xjenza tal-kompjuter, 229 00:11:08,870 --> 00:11:12,520 u stajt mgħallma lottijiet ta ' korsijiet differenti matul is-snin. 230 00:11:12,520 --> 00:11:14,870 U nixtieq biex jgħidlek ftit dwar xi 231 00:11:14,870 --> 00:11:19,530 mill-affarijiet interessanti li mxew fuq Harvard, li jien 232 00:11:19,530 --> 00:11:22,110 kellhom xi kuntatt matul is-snin. 233 00:11:22,110 --> 00:11:27,070 >> Tagħha undergraduate tiegħi teżi, fl-1968, li 234 00:11:27,070 --> 00:11:30,610 I kiteb żewġ dimensjonijiet lingwa ta 'programmar. 235 00:11:30,610 --> 00:11:36,555 Dan huwa pjan qalba memorja, dawk huma doughnuts manjetiċi ftit 236 00:11:36,555 --> 00:11:39,080 li huma midmum fuq il- intersezzjonijiet ta 'wajers. 237 00:11:39,080 --> 00:11:44,320 U dan kien il-mod memorja issawwret qabel semikondutturi 238 00:11:44,320 --> 00:11:47,560 saret teknoloġija vijabbli. 239 00:11:47,560 --> 00:11:52,900 Dan huwa 15 gigabyte kmieni iPod, li I iżommu madwar 240 00:11:52,900 --> 00:11:56,200 mhux għaliex ħadd impressjonat ma jkollhom gigabyte iPod 15, 241 00:11:56,200 --> 00:12:00,740 iżda minħabba li din hija 70 drive megabyte, u dawn 242 00:12:00,740 --> 00:12:05,820 marru fil-disk drives li kienu dwar id-daqs ta 'magni tal-ħasil. 243 00:12:05,820 --> 00:12:07,820 Allura li kien biss 70 megabytes tal-memorja, li 244 00:12:07,820 --> 00:12:10,359 jagħtik xi sens ta ' kif l-affarijiet skalat. 245 00:12:10,359 --> 00:12:11,900 DAVID J Malan: U issa tweet ieħor. 246 00:12:11,900 --> 00:12:13,820 Dan wieħed minn William fir-Renju Unit 247 00:12:13,820 --> 00:12:17,750 li kiteb, "David J. Malan, wara ftit ta 'Google stalking, jirriżulta Rob 248 00:12:17,750 --> 00:12:19,060 għandha twin brother. 249 00:12:19,060 --> 00:12:21,830 Nistgħu jniżżlu fil CS50Live u jilagħbu spot-differenza? " 250 00:12:21,830 --> 00:12:23,690 Allura William, dan huwa tabilħaqq il-każ. 251 00:12:23,690 --> 00:12:26,660 Stess Rob Bowden CS50 tal ma jkollhom twin brother. 252 00:12:26,660 --> 00:12:31,620 Fil-fatt, hawnhekk hija Rob u Paul - jew Paul u - isaffru hawn 253 00:12:31,620 --> 00:12:35,280 huma żewġ Bowdens, tnejn minnhom għandhom attwalment TFed għall CS50 fil-passat, 254 00:12:35,280 --> 00:12:38,050 u tabilħaqq Rob issa hija fuq Tim time full CS50 tal. 255 00:12:38,050 --> 00:12:40,510 >> Issa, aħna wisq ma daqsxejn ta 'Google stalking, u jirriżulta 256 00:12:40,510 --> 00:12:43,310 li twin brother Paul għandha YouTube tiegħu stess 257 00:12:43,310 --> 00:12:46,410 kanal li fih fancies ruħu daqsxejn ta 'kummidjant. 258 00:12:46,410 --> 00:12:47,548 Ejja tagħti ħarsa. 259 00:12:47,548 --> 00:12:49,940 >> PAUL BOWDEN: Hey guys. 260 00:12:49,940 --> 00:12:51,460 Paul Bowden hawn ukoll. 261 00:12:51,460 --> 00:12:54,900 Jien lura ma tieni tipprova tiegħi fil stand up. 262 00:12:54,900 --> 00:12:58,910 Iva, I do jafu li jien bilqiegħda. 263 00:12:58,910 --> 00:13:02,810 L-ewwel darba ma tmurx kif ukoll I ttamajna għal, 264 00:13:02,810 --> 00:13:05,840 iżda I ħa l-parir li inti guys offruti, 265 00:13:05,840 --> 00:13:10,290 u dan iż-żmien jien ser tkun ftit inqas skomdi, u ftit aħjar 266 00:13:10,290 --> 00:13:13,326 fuq quddiem ċajta. 267 00:13:13,326 --> 00:13:16,450 DAVID J Malan: Issa jekk inti tixtieq tabbona għal kanal Pawl fuq YouTube, 268 00:13:16,450 --> 00:13:20,070 u inti għandek, ras għal dan il-URL hawn. 269 00:13:20,070 --> 00:13:23,390 Issa brother Rob huwa ta 'kors kburi ħafna ta 'twin brother tiegħu. 270 00:13:23,390 --> 00:13:27,980 Fil-fatt, isaffru hawnhekk huwa Rob bħala GIF animati tagħmel pompa fist. 271 00:13:27,980 --> 00:13:31,360 Issa dan ikun attwalment ġie ċċirkolat fuq l-internet pjuttost ftit. 272 00:13:31,360 --> 00:13:33,240 Mela jekk inti Google madwar għal din id-dehra hawn, 273 00:13:33,240 --> 00:13:36,110 inti tista 'ukoll tagħmel dan tiegħek wallpaper jekk inti tixtieq. 274 00:13:36,110 --> 00:13:37,130 U inti għandek. 275 00:13:37,130 --> 00:13:41,390 >> Issa Rob hawn kien cheering tiegħu brother fuq fil-logħba Amerikana popolari 276 00:13:41,390 --> 00:13:43,232 juru li Paul kien parteċipant. 277 00:13:43,232 --> 00:13:44,440 Issa, dak li juru logħba kienet li? 278 00:13:44,440 --> 00:13:46,148 Well aħna ser jitilqu minnu lilek, l-internet, 279 00:13:46,148 --> 00:13:49,210 biex insemmu eżattament dak game juru Paul Bowden sehem fuq, 280 00:13:49,210 --> 00:13:53,140 u jekk inti tista 'ssib li minn, let us jafu mill Facebook, Reddit, jew Twitter, 281 00:13:53,140 --> 00:13:57,510 u aħna ser tara jekk aħna ma tista 'turi ftit clip fil-CS50Live jmiss. 282 00:13:57,510 --> 00:13:59,330 >> U issa biċċa ta 'hardware. 283 00:13:59,330 --> 00:14:02,080 Kif inti tista smajt, CS50 fl xi wħud huwa fuq sezzjonijiet kampus 284 00:14:02,080 --> 00:14:04,060 juża biċċa ta 'hardware magħrufa bħala l-Arduino. 285 00:14:04,060 --> 00:14:06,194 Isaffru hawn per eżempju, huwa l-Uno Arduino, 286 00:14:06,194 --> 00:14:08,610 bord ta 'ċirkwit ftit li inti tista 'tqabbad ma' kompjuter, 287 00:14:08,610 --> 00:14:11,010 u mbagħad fil-fatt programm dan billi tikteb C kodiċi +, 288 00:14:11,010 --> 00:14:14,710 u mbagħad jinħaraq fil-hardware hekk li jkun jista 'effettivament tesegwixxi programmi. 289 00:14:14,710 --> 00:14:17,140 Issa waħda mill-klassi tiegħek hawn, Areor, iddeċieda 290 00:14:17,140 --> 00:14:20,110 wajer up Arduino Uno għall-kompjuter tiegħu 291 00:14:20,110 --> 00:14:24,350 u mbagħad jimplimentaw, jekk inti tista ' jemmnu, Problem Set 2 tal Caesar. 292 00:14:24,350 --> 00:14:27,030 >> Issa aħna ma jkollhom ebda awdjo dan il-video, imma ejja zoom 293 00:14:27,030 --> 00:14:28,755 u tagħti ħarsa lejn ir-riżultat finali. 294 00:14:28,755 --> 00:14:43,112 295 00:14:43,112 --> 00:14:45,570 Issa jekk inti Redditer, inti jista 'jkollok ndunat din il-kariga 296 00:14:45,570 --> 00:14:49,290 ftit ġimgħat ilu reklamar episodju tnejn CS50Live. 297 00:14:49,290 --> 00:14:52,900 Issa waħda mill-klassi tiegħek, Louis minn Montreal, il-Kanada, wara li episodju 298 00:14:52,900 --> 00:14:55,556 ġentilment stazzjonati, "Ara naqra, li wieħed kien storiku. " 299 00:14:55,556 --> 00:15:00,600 Biss biex jikkoreġi ruħu ftit minuti aktar tard ma 'jeditjaw - "hysterical, HA HA." 300 00:15:00,600 --> 00:15:02,410 Allura aħna ser teħodha jew mod, imma dak kien 301 00:15:02,410 --> 00:15:05,130 funnier minn dan, hija li Chris minn Toronto, Kanada 302 00:15:05,130 --> 00:15:08,290 imbagħad segwiti kif ġej, "Ikun hysterical 303 00:15:08,290 --> 00:15:12,670 jekk l-episodju li jmiss kien storika kif riżultat tal-persunal tal-produzzjoni jaraw 304 00:15:12,670 --> 00:15:13,490 dan il-kumment. " 305 00:15:13,490 --> 00:15:16,800 Well tabilħaqq għamilna, u issa xi storja aktar. 306 00:15:16,800 --> 00:15:18,360 >> Aħna jinġibed dan up mill-arkivji. 307 00:15:18,360 --> 00:15:22,700 Dan huwa fil-magażin, Popular Electronics, kwistjoni mill-1975, 308 00:15:22,700 --> 00:15:25,850 li ġarrew dan headline, Kit Dinja Ewwel minikompjuter 309 00:15:25,850 --> 00:15:27,440 rivali kummerċjali Mudelli. 310 00:15:27,440 --> 00:15:29,050 Il-Altair 8800. 311 00:15:29,050 --> 00:15:31,940 Issa fil-ħin ma kienx hemm verament lingwa ta 'programmar 312 00:15:31,940 --> 00:15:35,110 li magħhom inti tista 'tagħmel dan magna isolvu problemi faċilment, 313 00:15:35,110 --> 00:15:36,930 u għalhekk Harvard żgħażagħ student fil-ħin 314 00:15:36,930 --> 00:15:39,810 jismu Bill Gates deċiż ma 'xi ħbieb ta' tiegħu 315 00:15:39,810 --> 00:15:43,700 jiktbu l-ewwel interpretu sabiex lingwa ta 'programmar, magħrufa bħala bażiku, 316 00:15:43,700 --> 00:15:45,900 li biex issuq din il-biċċa ta 'hardware. 317 00:15:45,900 --> 00:15:48,220 Aħna ħa stroll reċentement mal-Professur Harry Lewis 318 00:15:48,220 --> 00:15:51,040 li Maxwell Dworkin, tal Harvard bini xjenza tal-kompjuter, fejn 319 00:15:51,040 --> 00:15:55,170 il-kodiċi tas-sors għal dik oriġinali Interpretu BAŻIĊI għadha prekarja. 320 00:15:55,170 --> 00:15:57,162 U aħna jistaqsi lilu jekk hu tista 'tagħtina tour. 321 00:15:57,162 --> 00:15:58,870 PROFESSUR HARRY LEWIS: Dak li għandek hawn 322 00:15:58,870 --> 00:16:03,780 hija lista ta ' biċċa bikrija ta 'software 323 00:16:03,780 --> 00:16:08,470 miktub minn Bill Gates u Paul Allen, il-fundaturi ta 'Microsoft. 324 00:16:08,470 --> 00:16:10,790 Allura l-kodiċi huwa interessanti għal żewġ raġunijiet. 325 00:16:10,790 --> 00:16:13,720 L-ewwelnett sar Ewwel prodott Microsoft, 326 00:16:13,720 --> 00:16:20,080 li kienet interpretu għal il-lingwa ta 'programmar bażiku. 327 00:16:20,080 --> 00:16:23,190 U t-tieni, dan kien wieħed mill-ewwel tentattivi 328 00:16:23,190 --> 00:16:28,840 biex joħolqu interpretu sabiex ordinarja nies jistgħu jużaw il-kompjuters personali. 329 00:16:28,840 --> 00:16:30,900 Allura Bill Gates kien undergraduate fil-Harvard. 330 00:16:30,900 --> 00:16:33,070 I bdiet tagħlim fil-Harvard fl-1974. 331 00:16:33,070 --> 00:16:38,390 Dan sar fl-1975, għalhekk kien kmieni fil-karriera tiegħu u kmieni fil-karriera tiegħi. 332 00:16:38,390 --> 00:16:42,040 I attwalment mgħallma Bill fl kors madwar dan iż-żmien. 333 00:16:42,040 --> 00:16:45,380 Paul Allen ma kienx Harvard student, imma hu 334 00:16:45,380 --> 00:16:49,200 kien iskola għolja classmate ta 'Bill Gates. 335 00:16:49,200 --> 00:16:51,990 >> Jekk inti ġejjin u ħarsa fl-elenkar, inti ser 336 00:16:51,990 --> 00:16:56,600 attwalment issib Isem terz, Monte Davidoff, li kien classmate Gates "hawn 337 00:16:56,600 --> 00:16:57,500 fil-Harvard. 338 00:16:57,500 --> 00:16:59,600 OK, hekk Heres kumment interessanti up here. 339 00:16:59,600 --> 00:17:05,400 Huwa jgħid, "Fil 4k tista 'tħassar kwadru għerq iżda għal-linji xorta għandha taħdem. " 340 00:17:05,400 --> 00:17:11,310 OK, sabiex dak li tfisser hija li hemm kien żewġ modi biex jikkompilaw dan il-programm. 341 00:17:11,310 --> 00:17:16,140 Wieħed kien biex imexxu fuq verżjoni ta 'dan il-kompjuter Altair 342 00:17:16,140 --> 00:17:19,339 li kellu biss 4K kliem ta 'memorja. 343 00:17:19,339 --> 00:17:22,430 4096 kliem ta 'memorja. 344 00:17:22,430 --> 00:17:28,020 Iżda l-verżjoni big kellha 8 K, u għalhekk dak li dan jgħid hija li fil-verżjoni 4K 345 00:17:28,020 --> 00:17:31,030 inti kellhom jitħassru xi kodiċi li jagħmilha tajbin. 346 00:17:31,030 --> 00:17:33,050 U waħda mill-affarijiet li titħassar 347 00:17:33,050 --> 00:17:37,960 ikun l-rutina għerq kwadrat, imma apparentement l-għal-linji 348 00:17:37,960 --> 00:17:41,220 xorta għandhom jaħdmu, anke meta int kompilazzjoni isfel 349 00:17:41,220 --> 00:17:46,150 biss għall-verżjoni 4K tal-kompjuter kit. 350 00:17:46,150 --> 00:17:49,750 >> Issa jekk inti zoom fuq il-kodiċi sors jista 'jkollok ndunat isem familjari. 351 00:17:49,750 --> 00:17:52,280 Tabilħaqq, User Holloway kien l-individwu li 352 00:17:52,280 --> 00:17:56,282 stampat dan is-sors kodiċi f'April tal-1975. 353 00:17:56,282 --> 00:17:59,240 Issa dawk tal inti li ħadthom mistoqsijiet, forsi fuq Reddit jew x'imkien ieħor 354 00:17:59,240 --> 00:18:03,274 għall CS50, jista 'jkollok jiltaqgħu Glenn Holloway, wieħed mill-membri tat-tim CS50 tal 355 00:18:03,274 --> 00:18:05,440 li kienet attwalment ma l-kors għal xi żmien, 356 00:18:05,440 --> 00:18:09,160 u ħafna graciously joffri spiss biex jgħinu lill-istudenti permezz tal-internet 357 00:18:09,160 --> 00:18:11,140 ma 'kwalunkwe problema li jistgħu isolvu. 358 00:18:11,140 --> 00:18:13,770 U fil-fatt, jidher li kien tagħmel dan anke fil-imgħoddi 359 00:18:13,770 --> 00:18:16,320 meta dan il-kodiċi sors meħtieġa biex jiġu stampati. 360 00:18:16,320 --> 00:18:20,240 >> Issa ejja malajr biex tippreżenta jum, fil- fatt dan huwa tassew breaking news. 361 00:18:20,240 --> 00:18:23,577 Reċentement urew kien dan il-proġett tango, inizjattiva mill-Google 362 00:18:23,577 --> 00:18:25,660 u numru ta 'oħrajn kumpaniji li attwalment joħolqu 363 00:18:25,660 --> 00:18:28,830 software li magħhom inti tista 'tuża telefon jew apparat bla wajers simili 364 00:18:28,830 --> 00:18:31,150 u jimxu madwar tiegħek ambjent fiżiku 365 00:18:31,150 --> 00:18:34,960 u fil-fatt tagħmel 3D mudell ta 'dan - li tipikament huwa oerhört ħin 366 00:18:34,960 --> 00:18:36,340 jikkunsmaw u / jew għaljin. 367 00:18:36,340 --> 00:18:40,350 And yet, mat-teknoloġija tal-lum inti dalwaqt tkun qiegħda tagħmel dan yourself, 368 00:18:40,350 --> 00:18:43,150 u inti dalwaqt tkun bil-miktub software yourself magħhom 369 00:18:43,150 --> 00:18:44,930 lieva din it-teknika l-ġdida. 370 00:18:44,930 --> 00:18:45,680 Ejja tagħti ħarsa. 371 00:18:45,680 --> 00:18:49,530 372 00:18:49,530 --> 00:18:52,540 >> JOHNNY LEE: Jisimni Johnny Lee, u naħdem fit-teknoloġija avvanzata 373 00:18:52,540 --> 00:18:54,560 u proġetti grupp fl Google. 374 00:18:54,560 --> 00:18:56,690 Tim żgħir tagħna hawn, bbażati fil-California, 375 00:18:56,690 --> 00:19:01,200 ilha taħdem ma 'universitajiet, laboratorji ta 'riċerka, u l-imsieħba industrijali 376 00:19:01,200 --> 00:19:05,220 għall-ħsad l-aħħar 10 snin ta ' riċerka fl-robotika u kompjuter viżjoni 377 00:19:05,220 --> 00:19:09,260 jikkonċentraw li t-teknoloġija fi telefon ċellulari ħafna uniku. 378 00:19:09,260 --> 00:19:14,100 Aħna bnedmin fiżiċi li ngħixu f'dinja 3D, 379 00:19:14,100 --> 00:19:17,690 apparat għadhom mobbli llum jassumi li d-dinja fiżika 380 00:19:17,690 --> 00:19:19,820 jintemm il-konfini ta 'l-iskrin. 381 00:19:19,820 --> 00:19:23,010 Għan tagħna huwa li jagħti mobbli mezzi skala umana 382 00:19:23,010 --> 00:19:24,665 fehim ta 'l-ispazju u l-mozzjoni. 383 00:19:24,665 --> 00:19:26,540 Eitan Marder-EPPSTEIN: Dan se jippermetti 384 00:19:26,540 --> 00:19:28,480 nies biex jinteraġixxu ambjent tagħhom 385 00:19:28,480 --> 00:19:30,360 fil biss mod fundamentalment differenti. 386 00:19:30,360 --> 00:19:33,330 Nistgħu prototip fil- siegħa koppja xi ħaġa li 387 00:19:33,330 --> 00:19:36,070 jqarrbuna xhur jew anke snin qabel, 388 00:19:36,070 --> 00:19:38,670 għaliex aħna ma kellhomx din teknoloġija disponibbli. 389 00:19:38,670 --> 00:19:41,760 >> TED LARSON: X'jiġri jekk inti kollha ta 'dawn il-biċċiet fil-telefon? 390 00:19:41,760 --> 00:19:46,280 Kif ma li tibdel dak phone hu? 391 00:19:46,280 --> 00:19:48,460 >> JOHNNY LEE: Aħna ħolqot phone prototip 392 00:19:48,460 --> 00:19:52,150 fihom ferm apposta hardware u software, imfassla 393 00:19:52,150 --> 00:19:56,600 li jippermetti lill-phone biex track huwa mozzjoni fil 3D sħiħa, fil-ħin reali 394 00:19:56,600 --> 00:19:58,120 kif inti iżommha. 395 00:19:58,120 --> 00:20:01,840 Dawn sensors jagħmlu fuq kwart miljun 3D kejl 396 00:20:01,840 --> 00:20:05,980 kull tieni wieħed, taġġorna l- pożizzjoni u r-rotazzjoni tal-telefon, 397 00:20:05,980 --> 00:20:09,760 fużjoni din l-informazzjoni fi 3D mudell uniku ta 'l-ambjent. 398 00:20:09,760 --> 00:20:12,625 >> Chris ANDERSON: Għandna problema imsejħa navigazzjoni ġewwa. 399 00:20:12,625 --> 00:20:14,300 U huwa soluzzjoni għal din il-problema. 400 00:20:14,300 --> 00:20:17,383 >> Eitan Marder-EPPSTEIN: Huwa binarji tiegħek pożizzjoni kif inti tmur madwar id-dinja. 401 00:20:17,383 --> 00:20:19,070 U wkoll tagħmel mappa ta 'dak. 402 00:20:19,070 --> 00:20:23,114 >> CHASE COBB: Immaġina li inti scan a sezzjoni żgħira tal-kamra tiegħek jgħixu. 403 00:20:23,114 --> 00:20:27,250 U mbagħad huma kapaċi li jiġġeneraw dinja logħba ftit fiha. 404 00:20:27,250 --> 00:20:29,900 I do not know ta 'kwalunkwe kontrollur jew logħob 405 00:20:29,900 --> 00:20:31,660 mezz li tista 'tagħmel dan fil-mument. 406 00:20:31,660 --> 00:20:33,250 >> TULLY FOOTE: Inpoġġu dan kollu flimkien, huma 407 00:20:33,250 --> 00:20:35,041 jinġibed esperti minn madwar id-dinja 408 00:20:35,041 --> 00:20:37,360 u ltqajna lilhom kollha jaħdmu fuq l-istess proġett. 409 00:20:37,360 --> 00:20:40,366 >> Remi EL-QUAZZANE: Dawk huma kalibru għoli ħafna ta 'nies. 410 00:20:40,366 --> 00:20:40,865 Għaliex? 411 00:20:40,865 --> 00:20:42,302 Huwa sempliċi ħafna. 412 00:20:42,302 --> 00:20:44,782 I think, fil-fatt, in-nies li jemmnu fil-viżjoni. 413 00:20:44,782 --> 00:20:47,240 JOHNNY LEE: Lokalizzazzjoni ta ' mapping hemm fuq il-mobile tiegħek, 414 00:20:47,240 --> 00:20:49,000 u inti tagħmel użu minnha biss. 415 00:20:49,000 --> 00:20:51,750 Huwa din il-ħila li jsegwu fil-passi ta 'nies oħrajn. 416 00:20:51,750 --> 00:20:55,070 >> Dirk THOMAS: U aħna jistgħu wkoll jibbenefikaw minn dak li nagħmlu għall-proġett 417 00:20:55,070 --> 00:20:57,258 lura għall-komunità open source. 418 00:20:57,258 --> 00:20:59,350 >> CHASE COBB: Użu minnha għal neqsin mid-dawl, 419 00:20:59,350 --> 00:21:01,880 u jagħtuhom ħsieb smigħ ta 'fejn dawn qed tmur. 420 00:21:01,880 --> 00:21:04,205 >> Vince PASCUAL: Li tkun kapaċi jikklassifikaw dar tiegħek, 421 00:21:04,205 --> 00:21:07,030 jduru madwar, let me tara kif din l-għamara jaħdem fil-kamra. 422 00:21:07,030 --> 00:21:09,580 >> Eitan Marder-EPPSTEIN: Virtual twieqi lir dinjiet differenti, 423 00:21:09,580 --> 00:21:11,413 I tfisser il-possibbiltajiet huma verament bla tmiem. 424 00:21:11,413 --> 00:21:14,015 425 00:21:14,015 --> 00:21:16,890 JOHNNY LEE: Matul il-ftit xhur li ġejjin aħna se tqassam kits DEV 426 00:21:16,890 --> 00:21:20,566 iżviluppaturi ta 'softwer biex jiżviluppaw applikazzjonijiet u algoritmi fuq nett 427 00:21:20,566 --> 00:21:22,572 ta 'din il-pjattaforma. 428 00:21:22,572 --> 00:21:27,240 U aħna biss fil-bidu, u nafu hemm ħafna aktar xogħol xi jsir. 429 00:21:27,240 --> 00:21:30,541 Iżda aħna eċċitati dwar fejn huwa se jmorru. 430 00:21:30,541 --> 00:21:35,180 Il-futur huwa tal-biża, u nemmnu nistgħu nibnu aktar mgħaġġel flimkien. 431 00:21:35,180 --> 00:21:41,137 432 00:21:41,137 --> 00:21:43,970 DAVID J. Malan: U issa l-mument inti probabilment ħadthom ilhom jistennew. 433 00:21:43,970 --> 00:21:45,990 Inti tista 'tfakkar li fl-aħħar episodju aħna 434 00:21:45,990 --> 00:21:49,970 maqsuma dan tweet minn Andrew CS50 stess Hill, li ftit xhur wara kiteb us 435 00:21:49,970 --> 00:21:52,650 dan, "David J Malan, fejn huwa fanal tiegħi?" 436 00:21:52,650 --> 00:21:55,690 Issa minn dakinhar numru ta 'għandek videos sottomessi jagħmlu każ tiegħek 437 00:21:55,690 --> 00:21:59,120 għaliex inti għandek tkun li jmiss riċevitur ta 'fanal desk CS50. 438 00:21:59,120 --> 00:22:02,650 Ħsibna aħna'd jaqsmu fl-ewwel wieħed minn Mohamed fil-Marokk. 439 00:22:02,650 --> 00:22:05,800 Jirriżulta li birthday Mohammed kienet din il-ġimgħa fil-passat, sabiex ippermettuli wkoll 440 00:22:05,800 --> 00:22:10,050 f'isem CS50 ngħid kuntenti Birthday 19 għall Mohamed. 441 00:22:10,050 --> 00:22:11,996 Ejja tagħti ħarsa. 442 00:22:11,996 --> 00:22:15,080 >> MOHAMMED: Hello, I am Mohamed mill-Marokk. 443 00:22:15,080 --> 00:22:20,510 I am jistudjaw f'pajjiż ieħor belt - li huwa ftit bogħod mill-belt oriġinali tiegħi 444 00:22:20,510 --> 00:22:25,390 fejn I am jgħixu mal-familja tiegħi - fejn tlaqt fanal desk tiegħi. 445 00:22:25,390 --> 00:22:28,940 Hekk jien jgħixu fi dormitory u dan huwa kamra tiegħi. 446 00:22:28,940 --> 00:22:32,810 447 00:22:32,810 --> 00:22:37,440 Tista 'tara hawnhekk li d-dawl hija isfar, u jien ma really bhalu. 448 00:22:37,440 --> 00:22:39,250 I jippreferu l-waħda bajda. 449 00:22:39,250 --> 00:22:43,350 C'est pourquoi nixtieq fanal desk CS50. 450 00:22:43,350 --> 00:22:47,109 Tista 'timmaġina me seduta hemm u jaħdmu magħha. 451 00:22:47,109 --> 00:22:48,900 DAVID J. Malan: And issa sottomissjoni ieħor. 452 00:22:48,900 --> 00:22:52,700 Dan Emad waħda, student fil-kamra dorm tiegħu. 453 00:22:52,700 --> 00:22:54,680 >> Emad: Jien Emad minn [inaudible]. 454 00:22:54,680 --> 00:22:56,605 Allura għaliex irrid fanal desk? 455 00:22:56,605 --> 00:22:59,760 L-ewwelnett, dan ser jaġixxi bħala sors moderat ta 'dawl 456 00:22:59,760 --> 00:23:03,380 għall-istudji tiegħi ta 'l-iskola għolja, kif stajt biss bdiet raba 'sena. 457 00:23:03,380 --> 00:23:06,730 U kif ukoll kif ukoll l- korsijiet online, speċjalment CS50. 458 00:23:06,730 --> 00:23:09,130 L-aktar importanti raġuni hija li se 459 00:23:09,130 --> 00:23:11,190 jaġixxu bħala softwer għall-CS50 kors. 460 00:23:11,190 --> 00:23:13,550 Per eżempju, jekk xi ħadd taqa 'fil-dar tiegħi u jitlob 461 00:23:13,550 --> 00:23:17,720 kif ma ikollok dak lampa beautiful, I se jgħidulhom li klassi CS50 bagħtitu. 462 00:23:17,720 --> 00:23:21,290 U so I inxerrdu l-kelma ta ' CS50, u aktar importanti, I 463 00:23:21,290 --> 00:23:23,970 ftakar jekk għall-ħajja tiegħi. 464 00:23:23,970 --> 00:23:27,460 I am Emad, u dan huwa CS50. 465 00:23:27,460 --> 00:23:30,510 >> DAVID J. Malan: U issa Tim minn Malasja, isaffru hawn fid-dlam. 466 00:23:30,510 --> 00:23:31,220 Isma mill-qrib. 467 00:23:31,220 --> 00:24:19,030 468 00:24:19,030 --> 00:24:21,640 DAVID J. Malan: U issa familja film friendly minn Zevin 469 00:24:21,640 --> 00:24:24,336 fil Vancouver, British Columbia. 470 00:24:24,336 --> 00:24:25,080 >> ZEVIN: Hi hemmhekk. 471 00:24:25,080 --> 00:24:26,250 Jien Zevin Lennick. 472 00:24:26,250 --> 00:24:30,925 Jien tagħmel EDX għall CS50, u aħna ma tistax issib lampa tagħna. 473 00:24:30,925 --> 00:24:31,675 Il-house huwa skur. 474 00:24:31,675 --> 00:24:32,610 What do you think? 475 00:24:32,610 --> 00:24:34,530 >> SPEAKER 1: Forsi huwa hemmhekk? 476 00:24:34,530 --> 00:24:35,385 >> ZEVIN: Inti żgur? 477 00:24:35,385 --> 00:24:35,670 >> SPEAKER 1: Forsi. 478 00:24:35,670 --> 00:24:36,910 >> ZEVIN: Jekk immorru issir taf? 479 00:24:36,910 --> 00:24:37,620 >> SPEAKER 1: Ejja ħa mmorru. 480 00:24:37,620 --> 00:24:38,245 >> ZEVIN: Alright. 481 00:24:38,245 --> 00:24:42,030 482 00:24:42,030 --> 00:24:43,530 >> SPEAKER 1: Whoa, tħares lejn dak tad-dawl. 483 00:24:43,530 --> 00:24:45,540 >> ZEVIN: Forsi hemm lampa fil hemmhekk. 484 00:24:45,540 --> 00:24:47,129 >> SPEAKER 1: Ejja check out. 485 00:24:47,129 --> 00:24:48,420 ZEVIN: Tixtieq lili biex jagħmlu dan? 486 00:24:48,420 --> 00:24:49,535 SPEAKER 1: Le, jien ser jagħmlu dan. 487 00:24:49,535 --> 00:24:51,365 ZEVIN: OK. 488 00:24:51,365 --> 00:24:52,805 SPEAKER 1: Għixien 'il bogħod minn lampa tiegħi! 489 00:24:52,805 --> 00:24:53,305 Oh no! 490 00:24:53,305 --> 00:24:55,634 491 00:24:55,634 --> 00:24:58,050 DAVID J. Malan: U issa sottomissjoni mill Eggers fil-Latvja 492 00:24:58,050 --> 00:25:03,360 li verament ħa affarijiet up a talja ma 'dan il-film. 493 00:25:03,360 --> 00:25:05,180 >> Eggers: (AS BOZZA 1) Well, kif inti tagħmel? 494 00:25:05,180 --> 00:25:07,250 >> Woman: (AS BOZZA 2) Mmm. 495 00:25:07,250 --> 00:25:07,750 Hello. 496 00:25:07,750 --> 00:25:20,440 497 00:25:20,440 --> 00:25:22,170 >> Eggers: (AS lightbulb 1) Dan huwa tal-biża. 498 00:25:22,170 --> 00:25:25,260 >> Woman: (AS lightbulb 2) Iva. 499 00:25:25,260 --> 00:25:26,782 Ooh! 500 00:25:26,782 --> 00:25:27,990 Eggers: (AS lightbulb 1) Ooh! 501 00:25:27,990 --> 00:25:30,323 Eggers: (AS BABY lightbulb) [Daħk] Fejn lampa tiegħi? 502 00:25:30,323 --> 00:25:32,450 503 00:25:32,450 --> 00:25:33,920 >> Eggers: Hi, jien jisimni Eggers. 504 00:25:33,920 --> 00:25:35,927 And I am mill-Latvja. 505 00:25:35,927 --> 00:25:37,214 U dan hu - 506 00:25:37,214 --> 00:25:38,089 SPEAKER 2: studju tagħna. 507 00:25:38,089 --> 00:25:39,466 Soġġorn sintonizzat. 508 00:25:39,466 --> 00:25:42,220 >> Eggers: Le, dan CS50. 509 00:25:42,220 --> 00:25:44,370 >> DAVID J. Malan: U issa, aħħar iżda mhux l-inqas, 510 00:25:44,370 --> 00:25:48,520 sottomissjoni mill Phillip fil-Ġermanja. 511 00:25:48,520 --> 00:25:50,436 >> PHILLIP: Ħej hemm David, jien Phil. 512 00:25:50,436 --> 00:25:52,635 Jien student ta 'konjittivi xjenza mill-Ġermanja. 513 00:25:52,635 --> 00:25:56,050 Xjenza konjittiva huwa qasam li l-istudji l-moħħ tal-bniedem 514 00:25:56,050 --> 00:26:01,410 u l-moħħ, magħquda minn dixxiplini bħall- newroxjenza, il-psikoloġija, il-lingwistika, 515 00:26:01,410 --> 00:26:03,270 u anki x-xjenza tal-kompjuter. 516 00:26:03,270 --> 00:26:07,120 Issa aħħar semestru, I qattgħu semestru barra mill-pajjiż fil-Harvard. 517 00:26:07,120 --> 00:26:10,030 U jien ukoll attendew kors tiegħek, CS50. 518 00:26:10,030 --> 00:26:13,850 >> Issa filwaqt I iħobb CS50, I qatt ma ltqajna fanal tiegħi desk stess. 519 00:26:13,850 --> 00:26:18,340 Now I mqajma naħa tiegħi fi kważi kull lecture f'attentat ddisprata 520 00:26:18,340 --> 00:26:21,405 biex jiksbu lili fuq il-palk u jirċievu desk CS50 tiegħi stess 521 00:26:21,405 --> 00:26:25,510 lampa - jew anki sempliċement fricking ball stress. 522 00:26:25,510 --> 00:26:29,530 Now I finalment qbilna stress tiegħi ballun fil-CS50 ġust, 523 00:26:29,530 --> 00:26:36,970 imma jien għadhom ibatu ħafna minn dik nuqqas ta 'fanal desk CS50 fil-ħajja tiegħi. 524 00:26:36,970 --> 00:26:41,930 Allura Sur David Malan, mistoqsija tiegħi li inti huwa pjuttost sempliċi. 525 00:26:41,930 --> 00:26:45,650 Fejn hi my [bleep] fanal desk? 526 00:26:45,650 --> 00:26:47,540 >> DAVID J. Malan: U issa ftit aktar istorja. 527 00:26:47,540 --> 00:26:50,270 Inti tista 'tfakkar li ġej film minn ġimgħa ta 'CS50. 528 00:26:50,270 --> 00:26:56,450 >> [MUSIC Plays] 529 00:26:56,450 --> 00:26:59,320 >> SPEAKER 3: A trijonf tal- ħiliet matematiċi u mekkaniċi, 530 00:26:59,320 --> 00:27:03,170 kif dan awtomatiċi ġdida kbira calculator fil-Harvard University. 531 00:27:03,170 --> 00:27:07,050 Problemi kumplessi fil-matematika tpoġġi permezz tal-magna f'forma kodifikata 532 00:27:07,050 --> 00:27:10,270 fuq tape huma akkuratament solvuti fil-frazzjoni minuta 533 00:27:10,270 --> 00:27:12,790 ż-żmien meħtieġ għall-kalkolu tal-bniedem. 534 00:27:12,790 --> 00:27:24,170 535 00:27:24,170 --> 00:27:28,485 Iddisinjati sabiex tħaffef kull forma ta ' riċerka matematiċi u xjentifiċi, 536 00:27:28,485 --> 00:27:33,610 il-moħħ mekkaniku ġgant se jaħdmu l-Istati Uniti Navy sal-aħħar tal-gwerra tal. 537 00:27:33,610 --> 00:27:42,745 538 00:27:42,745 --> 00:27:44,870 DAVID J. Malan: Issa l- Mark I m'għadux fl-użu, 539 00:27:44,870 --> 00:27:46,910 iżda ma għadhom jgħixu hawn fuq il-kampus. 540 00:27:46,910 --> 00:27:49,840 Aħna ddeċidiet li tieħu waħda finali stroll mal-Professur Harry Lewis 541 00:27:49,840 --> 00:27:53,080 biex tagħti ħarsa aktar mill-qrib tal-Harvard ċentru tax-xjenza - dar ġdida 542 00:27:53,080 --> 00:27:54,350 għall-Harvard Mark I. 543 00:27:54,350 --> 00:27:56,600 PROFESSUR HARRY LEWIS: So aħna qed fil-Xjenza Harvard 544 00:27:56,600 --> 00:27:59,950 Center, li hija l-salib it-toroq tal-kampus Harvard. 545 00:27:59,950 --> 00:28:04,180 A lott tad-dipartimenti tax-xjenza jkollhom klassijiet tagħhom u l-uffiċċji hawn. 546 00:28:04,180 --> 00:28:07,190 X'hemm warajna hawn huwa l-kompjuter Mark I, 547 00:28:07,190 --> 00:28:09,820 li kien kmieni kompjuter elettromekkanika. 548 00:28:09,820 --> 00:28:12,190 >> Allura l-kompjuter Mark I huwa hawn fil-Harvard 549 00:28:12,190 --> 00:28:17,580 għaliex Howard Hathaway Aiken, li kien il-persuna li maħsub u ddisinjat 550 00:28:17,580 --> 00:28:21,350 il-magna b'kollaborazzjoni ma 'inġiniera IBM, 551 00:28:21,350 --> 00:28:26,220 kien professur ta 'Harvard tal-matematika applikati. 552 00:28:26,220 --> 00:28:32,590 U ried biex ittaffi l-labor ta 'soluzzjoni ta' ekwazzjonijiet numeriċi 553 00:28:32,590 --> 00:28:36,820 permezz ta 'kalkolu mekkaniku li sar fuq lapes u karta. 554 00:28:36,820 --> 00:28:39,930 >> Dak li għandna hawnhekk huwa fatt biss blokki ta 'dan. 555 00:28:39,930 --> 00:28:43,820 Kien 51 pied fit-tul u meta kien kollu f'biċċa waħda. 556 00:28:43,820 --> 00:28:49,730 Hija tista 'tagħmel tliet żidiet kull sekonda, multiplikazzjoni ħa sitt sekondi, 557 00:28:49,730 --> 00:28:53,110 u diviżjoni ħa 15-il sekonda. 558 00:28:53,110 --> 00:28:57,870 Għalhekk din kienet progress enormi maż nagħmlu l-affarijiet ma 'lapes u karta, 559 00:28:57,870 --> 00:29:02,870 imma kien xogħol bil-mod, u ż-żamma il-magna għaddej il-ħin kollu 560 00:29:02,870 --> 00:29:08,670 kien proeza maġġuri ta elettromekkanika għarfien inġinerija. 561 00:29:08,670 --> 00:29:12,100 >> Huwa kien użat għall-ballistika kalkoli, għall-kalkolu 562 00:29:12,100 --> 00:29:15,120 -trajettorja ta 'missili. 563 00:29:15,120 --> 00:29:19,050 U kien ukoll użat għal ftit tal-kalkolu fil-Manhattan 564 00:29:19,050 --> 00:29:25,470 Proġett għad-determinazzjoni tal-lemin parametri għall-bomba atomika. 565 00:29:25,470 --> 00:29:29,230 >> Allura dak li tara hawn huma drives tejp tal-karta, 566 00:29:29,230 --> 00:29:33,550 għalhekk il-programm ġie ippanċjat tejp tal-karta u kien fuq loop. 567 00:29:33,550 --> 00:29:36,820 Dak li tara hemm reġistri li kieku 568 00:29:36,820 --> 00:29:42,060 jikkorrispondu għall-memorja maħżuna tal- magna, li kien użat biss għal data. 569 00:29:42,060 --> 00:29:44,480 Il-programm innifsu kien iffissat. 570 00:29:44,480 --> 00:29:47,460 Dawn typewriters elettriku kienu użati biex jistampaw l-output. 571 00:29:47,460 --> 00:29:51,220 Dawn dials, li jkollhom 10 pożizzjonijiet, huma 572 00:29:51,220 --> 00:29:53,120 fejn inti daħħal il-kostanti. 573 00:29:53,120 --> 00:29:57,990 Allura l-programm ġie ffissat fuq il-karta tejp, u jekk kellek kostanti, 574 00:29:57,990 --> 00:30:03,360 bħal ikollok fil-C + kodiċi - tissettja xi varjabbli ugwali għal 47 fil-bidu 575 00:30:03,360 --> 00:30:05,950 tal-programm tiegħek - dan huwa l-ekwivalenti hawnhekk. 576 00:30:05,950 --> 00:30:10,910 Inti dial fin-numru 47 jużaw dawn ir-reġistri. 577 00:30:10,910 --> 00:30:14,460 >> L-ekwivalenti komputazzjoni ta 'dan huwa ħafna inqas 578 00:30:14,460 --> 00:30:22,055 mill-iżgħar arloġġi tal-polz kompjuter li qed tiġi prodotta. 579 00:30:22,055 --> 00:30:23,680 DAVID J. Malan: Li lilha għall CS50Live. 580 00:30:23,680 --> 00:30:25,471 Grazzi tant għal dan kontributuri ġimgħa, 581 00:30:25,471 --> 00:30:27,550 kif ukoll biex din il-ġimgħa tim wara l-kamera. 582 00:30:27,550 --> 00:30:30,050 Ejja qrib l-ispettaklu ma ħarsa lejn proġett scratch 583 00:30:30,050 --> 00:30:32,040 minn Lisa Chung fil Boston, 584 00:30:32,040 --> 00:31:41,227 >> [MUSIC-YLVIS, "IL FOX"]