1 00:00:00,000 --> 00:00:00,500 2 00:00:00,500 --> 00:00:13,514 [Theme Music] 3 00:00:13,514 --> 00:00:32,147 4 00:00:32,147 --> 00:00:34,940 >> DAVID J. Malan: Je, wewe kusikia mimi, dunia? 5 00:00:34,940 --> 00:00:38,170 Hivyo katika sehemu ya pili ya wiki tutaweza majadiliano juu ya teknolojia ya kipaza sauti. 6 00:00:38,170 --> 00:00:40,460 Lakini kwa sasa, hebu kuanza. 7 00:00:40,460 --> 00:00:42,940 Hello, dunia, sisi ni nyuma, kama ni sauti yangu. 8 00:00:42,940 --> 00:00:44,980 Na hii ni CS50 Live. 9 00:00:44,980 --> 00:00:47,600 >> Na mvulana, je, sisi kuwa nzuri kuonyesha kwa ajili yenu wiki hii. 10 00:00:47,600 --> 00:00:49,720 Hasa, tumekuwa got Heartbleed mdudu 11 00:00:49,720 --> 00:00:52,900 kwamba imekuwa wote juu ya habari ya marehemu, baadhi ya hadithi kutoka kwa wanafunzi, 12 00:00:52,900 --> 00:00:56,356 safari kwa Vegas, nyuma ya scenes ziara ya Dropbox. 13 00:00:56,356 --> 00:01:00,800 Na mimi nina kusikia, ndiyo, CS50 ya mwenyewe Ramon Galvin ni nyuma. 14 00:01:00,800 --> 00:01:03,880 CS50 ya Ramon Galvin ni katika studio tena leo. 15 00:01:03,880 --> 00:01:05,650 >> Lakini kwanza, baadhi ya dawati taa. 16 00:01:05,650 --> 00:01:08,650 Bila shaka taa dawati kuwa kidogo jambo la muhula hii katika CS50. 17 00:01:08,650 --> 00:01:11,410 Na unaweza kukumbuka Ahmad, kutoka sehemu uliopita, ambao 18 00:01:11,410 --> 00:01:13,500 in video kufanya kesi yake kwa sababu 19 00:01:13,500 --> 00:01:16,580 yeye Ningependa kupokea yake mwenyewe CS50 dawati taa. 20 00:01:16,580 --> 00:01:18,630 Naam, sisi alimtuma dawati taa hatimaye Ahmad. 21 00:01:18,630 --> 00:01:21,000 Na yeye kindly waliotutuma picha hii mwenyewe 22 00:01:21,000 --> 00:01:24,020 katika Pakistan na taa CS50 dawati. 23 00:01:24,020 --> 00:01:27,730 >> Wakati huo huo, unaweza kukumbuka taa Hadithi, iliyowasilishwa na Eggers katika Latvia. 24 00:01:27,730 --> 00:01:29,870 Sisi alimtuma juu ya dawati taa kwa Latvia pia. 25 00:01:29,870 --> 00:01:32,330 Na picha hapa ni kwamba taa dawati. 26 00:01:32,330 --> 00:01:35,690 Hatimaye, unaweza kukumbuka Philip ambao hawakuwa tu kuwasilisha picha, 27 00:01:35,690 --> 00:01:38,790 lakini pia in video kupitia ambayo kuwashukuru sisi 28 00:01:38,790 --> 00:01:42,030 kwa ajili ya dawati taa yake, ambayo sisi alimtuma njia yote ya Ujerumani. 29 00:01:42,030 --> 00:01:43,690 Hebu tuangalie. 30 00:01:43,690 --> 00:01:44,540 >> Phillip: Hi. 31 00:01:44,540 --> 00:01:47,610 Ndugu Daudi, na wapenzi wote wa ninyi watu wa ajabu katika CS50. 32 00:01:47,610 --> 00:01:52,042 Mimi nina Phil na mimi nataka kuwashukuru sana kwa ajili ya zawadi hii ya ajabu. 33 00:01:52,042 --> 00:01:54,335 Ni ajabu kwa mimi kwamba kweli 34 00:01:54,335 --> 00:01:57,080 alimtuma hii njia yote juu hapa Ujerumani. 35 00:01:57,080 --> 00:01:58,290 Lakini unajua nini? 36 00:01:58,290 --> 00:02:01,742 Kwa nini si Namshukuru wewe mwenyewe? 37 00:02:01,742 --> 00:02:05,580 >> Hey, David, nataka kuwashukuru sana kwa taa hii CS50 dawati. 38 00:02:05,580 --> 00:02:08,669 Huwezi kufikiria hii ina maana gani kwangu. 39 00:02:08,669 --> 00:02:10,000 >> DAVID J. Malan: Desk taa? 40 00:02:10,000 --> 00:02:11,200 >> Phillip: Haki. 41 00:02:11,200 --> 00:02:17,099 OK, mimi naenda kuondoka, lakini, yeah, shukrani. 42 00:02:17,099 --> 00:02:19,640 DAVID J. Malan: Sasa, wawili kati ya yako wanafunzi wenzao kweli alisafiri 43 00:02:19,640 --> 00:02:21,400 kwetu kuwa na mazungumzo ya marehemu. 44 00:02:21,400 --> 00:02:25,420 Hasa, Amy kutoka Massachusetts na Jack kutoka Dublin, Ireland, 45 00:02:25,420 --> 00:02:28,940 alikuja njia yote ya Sanders Theater kukaa chini na kuzungumza kuhusu CS50 46 00:02:28,940 --> 00:02:30,270 zamani na sasa. 47 00:02:30,270 --> 00:02:33,160 48 00:02:33,160 --> 00:02:34,620 >> Hii ni Sanders Theater. 49 00:02:34,620 --> 00:02:38,410 Hivyo hii ni ambapo CS50 ya mihadhara ni uliofanyika. 50 00:02:38,410 --> 00:02:40,197 Asante sana kwa kuja chuo. 51 00:02:40,197 --> 00:02:41,780 Je, sisi kuanza na utambulisho? 52 00:02:41,780 --> 00:02:42,730 Mimi nina Daudi. 53 00:02:42,730 --> 00:02:43,560 >> AMY: Mimi Amy. 54 00:02:43,560 --> 00:02:46,770 Mimi kazi kwenye mtandao na mimi kuishi hapa katika Cambridge. 55 00:02:46,770 --> 00:02:49,244 >> JACK: Mimi Jack na mimi nina kutoka Dublin, Ireland. 56 00:02:49,244 --> 00:02:50,410 Mimi nina junior katika shule ya sekondari. 57 00:02:50,410 --> 00:02:53,659 >> DAVID J. Malan: Na nini huleta wewe hapa leo hasa kutokana na hivyo mbali mbali? 58 00:02:53,659 --> 00:02:55,230 JACK: Kwa ziara ya Boston. 59 00:02:55,230 --> 00:02:58,550 >> AMY: Ni jinsi gani CS50 tolewa kama tumekuwa kuwafundisha? 60 00:02:58,550 --> 00:03:02,420 >> DAVID J. Malan: Ni dhahiri kujipatia makubwa zaidi zaidi ya miaka. 61 00:03:02,420 --> 00:03:05,290 Tumekuwa sinema tangu mwaka 2007, hivyo tunaweza literally kurudi nyuma katika muda 62 00:03:05,290 --> 00:03:08,860 na kuangalia miaka ya nyuma, kwanza mihadhara hasa. 63 00:03:08,860 --> 00:03:11,800 Na nadhani hotuba ya kwanza katika 2007 ilikuwa pretty much 64 00:03:11,800 --> 00:03:13,640 yangu, kuja nje mbele ya darasa. 65 00:03:13,640 --> 00:03:16,550 Akisema, hello, hii ni CS50. 66 00:03:16,550 --> 00:03:18,900 Na sisi njiwa katika vifaa siku. 67 00:03:18,900 --> 00:03:21,210 >> Haki ya wote, hivyo welcome kwa Sayansi ya Kompyuta 50, 68 00:03:21,210 --> 00:03:23,120 Kuanzishwa kwa Sayansi ya Kompyuta 1. 69 00:03:23,120 --> 00:03:26,270 Jina langu ni David Malin na mimi itakuwa mwalimu yako hii - 70 00:03:26,270 --> 00:03:28,120 >> Sasa kuna music. 71 00:03:28,120 --> 00:03:29,450 taa kwenda chini. 72 00:03:29,450 --> 00:03:30,910 Sisi kushuka chini screen kubwa. 73 00:03:30,910 --> 00:03:33,335 Kuna au anaweza kuwa na Muppets katika mwaka huo. 74 00:03:33,335 --> 00:03:38,915 75 00:03:38,915 --> 00:03:42,680 Na ni funny, kwa sababu hii yote yamejitokeza sana hatua kwa hatua 76 00:03:42,680 --> 00:03:44,850 zaidi ya miaka, tu kidogo zaidi kila mwaka. 77 00:03:44,850 --> 00:03:47,510 Lakini delta, sasa, kati ya mwaka wa kwanza na mwaka jana 78 00:03:47,510 --> 00:03:51,670 ni kweli badala mauaji, jinsi dakika tano kwanza mbalimbali ni. 79 00:03:51,670 --> 00:03:56,700 >> AMY: Mimi curious, je, unaweza kuona kama tofauti kati ya EDX 80 00:03:56,700 --> 00:03:59,630 toleo na bila shaka kuishi? 81 00:03:59,630 --> 00:04:02,410 >> DAVID J. Malan: Kwa hiyo curricularly na teknolojia ya CS50 82 00:04:02,410 --> 00:04:06,850 juu ya chuo na CS50x mbali ya chuo ni uleule. 83 00:04:06,850 --> 00:04:09,560 Gani tofauti kati ya mbili ni kiwango cha msaada 84 00:04:09,560 --> 00:04:11,630 kwamba sisi ni uwezo wa kutoa. 85 00:04:11,630 --> 00:04:15,770 Hata kama CS50 ina timu mkubwa wa baadhi 100 wenzake kufundisha, bila shaka 86 00:04:15,770 --> 00:04:18,800 wasaidizi, mimi mwenyewe, na uzalishaji timu yetu - 87 00:04:18,800 --> 00:04:22,025 tunaweza tu vigumu kuweka juu na wanafunzi 700 juu ya chuo 88 00:04:22,025 --> 00:04:27,610 na wanafunzi 150 ugani Shule ambao ni wa ndani au online wenyewe. 89 00:04:27,610 --> 00:04:30,880 Hivyo kwa CS50x, sisi tu hawana msaada muundo wa masaa ya ofisi, 90 00:04:30,880 --> 00:04:33,057 kwa mfano, nne usiku wiki kwa saa kadhaa. 91 00:04:33,057 --> 00:04:36,390 JACK: Na je, guys majadiliano juu katika masaa ya ofisi ambayo itakuwa tofauti na, 92 00:04:36,390 --> 00:04:39,119 kusema, una nini juu ya mihadhara, au juu ya sehemu, au kaptula? 93 00:04:39,119 --> 00:04:41,160 DAVID J. Malan: Juu ya chuo masaa ya ofisi ni kweli 94 00:04:41,160 --> 00:04:44,740 fursa kwa wanafunzi kuuliza maswali, moja kwa moja, 95 00:04:44,740 --> 00:04:48,100 na mwanachama wa wafanyakazi wa kufundisha au hata classmate chao jirani. 96 00:04:48,100 --> 00:04:51,810 Na kwa ujumla kushindana na mende kwamba wao ni kuwa katika namba zao. 97 00:04:51,810 --> 00:04:55,350 >> AMY: Nadhani Reddit aina ya inatoa facsimile nzuri ya ofisi 98 00:04:55,350 --> 00:04:55,980 masaa. 99 00:04:55,980 --> 00:04:56,980 >> DAVID J. Malan: Walikubaliana, alikubali. 100 00:04:56,980 --> 00:04:59,521 Nimekuwa kwa kweli hisia, ingawa, na jamii Reddit 101 00:04:59,521 --> 00:05:01,430 na wageni kwa kundi, pia - tu 102 00:05:01,430 --> 00:05:03,700 jinsi watu hamu na matumaini kuwa. 103 00:05:03,700 --> 00:05:06,920 Na Reddit dhahiri imejikita bora, nadhani, kwa posting ya maadili ya 104 00:05:06,920 --> 00:05:08,800 na baada ya mnyororo majadiliano. 105 00:05:08,800 --> 00:05:10,871 >> JACK: Na unafikiri watu wanapaswa kujaribu, 106 00:05:10,871 --> 00:05:12,620 kama wanajua ni kufanya kitu kibaya 107 00:05:12,620 --> 00:05:15,986 au ni kama, wameweza kutekelezwa - alitumia muda mwingi juu yake, 108 00:05:15,986 --> 00:05:17,610 kufikiri wanapaswa kuacha na kuanza tena? 109 00:05:17,610 --> 00:05:18,840 Au kuangalia kwa msaada? 110 00:05:18,840 --> 00:05:20,260 Au ni jinsi gani wao - 111 00:05:20,260 --> 00:05:22,330 >> DAVID J. Malan: Kuchukua mapumziko, ya chini. 112 00:05:22,330 --> 00:05:26,790 Wakati mwingine, hasa kwa ajili yangu angalau, kama stress yako ngazi kuanza kupanda ninyi 113 00:05:26,790 --> 00:05:29,327 kuanza Hacking mbali na kuiga na pasting, kusahau 114 00:05:29,327 --> 00:05:30,410 nini umefanya tayari kujaribu. 115 00:05:30,410 --> 00:05:32,810 Ni wakati tu kwenda kwa kulala, au kwenda kuchukua jog, 116 00:05:32,810 --> 00:05:35,610 au kwenda kuoga, na tu aina ya kupata baadhi ya mbali. 117 00:05:35,610 --> 00:05:39,030 Na hii imetokea wengi, mara nyingi kwangu 118 00:05:39,030 --> 00:05:42,190 ambapo mimi utakuwa amelala hapo katika kitanda hata, au hata kuendesha gari kwa kazi, 119 00:05:42,190 --> 00:05:44,500 au kutembea mahali fulani, aina ya debugging katika kichwa changu. 120 00:05:44,500 --> 00:05:47,708 >> Na mara moja tu una umbali kwamba na mengi chini ya stress juu ya mabega yako, 121 00:05:47,708 --> 00:05:49,850 Nadhani, unaweza kutambua, kama, oh, mimi nina idiot. 122 00:05:49,850 --> 00:05:54,450 I forgot kuwaita kazi hii, au initialize baadhi kutofautiana. 123 00:05:54,450 --> 00:05:58,530 >> Hivyo kama mshangao kidogo kama Ningependa kuangalia chini ya CS50 kiti yako 124 00:05:58,530 --> 00:06:00,490 mto, kitu kidogo watapata wewe. 125 00:06:00,490 --> 00:06:07,184 126 00:06:07,184 --> 00:06:08,100 Hao inaonekana nzuri. 127 00:06:08,100 --> 00:06:11,280 Je, sisi kupata inaonekana hizo? 128 00:06:11,280 --> 00:06:14,550 >> Chini ya matakia yao kiti, ya Bila shaka, ilikuwa kidogo zaidi Dropbox nafasi. 129 00:06:14,550 --> 00:06:17,470 Sasa unaweza kukumbuka sisi hivi karibuni alisafiri hadi Saint Louis, Missouri, 130 00:06:17,470 --> 00:06:20,090 ambapo tulikuwa na fursa ya kipekee kwa kweli pigo kioo 131 00:06:20,090 --> 00:06:22,110 katika kiwanda Tatu Shahada ya kioo. 132 00:06:22,110 --> 00:06:26,150 Jeshi letu kwa siku alifanya bakuli hii nzuri ya kioo 133 00:06:26,150 --> 00:06:29,325 na inazunguka na inazunguka hadi got wavy athari hii nzuri. 134 00:06:29,325 --> 00:06:32,320 Na hii sasa anaishi katika yetu ofisi hapa katika Cambridge. 135 00:06:32,320 --> 00:06:35,640 >> Mimi, kwa upande mwingine, alifanya huu mpira kubwa ya kioo rangi ya machungwa 136 00:06:35,640 --> 00:06:37,230 kwamba sasa aketiye juu ya dawati yangu. 137 00:06:37,230 --> 00:06:39,860 Lakini sisi tulikuwa katika Saint Louis, ya Bila shaka, kwa CS50 hackathon 138 00:06:39,860 --> 00:06:42,730 katika Saint Louis na Launchcode, ambapo tulikuwa na fursa ya 139 00:06:42,730 --> 00:06:48,230 kukaa chini na idadi ya yako wanafunzi wenzao na kusikia CS50 hadithi zao. 140 00:06:48,230 --> 00:06:55,337 >> EZRA: Mara nikaona kompyuta coding na aina ya - hiyo ni 141 00:06:55,337 --> 00:06:56,670 kazi ambayo nataka kuwa in 142 00:06:56,670 --> 00:07:00,050 Na nadhani kwamba napenda kuwa nzuri sana katika hilo. 143 00:07:00,050 --> 00:07:02,680 >> CHARLES: Naam, nimekuwa uwindaji kazi kwa wakati. 144 00:07:02,680 --> 00:07:04,770 Shahada ya Sayansi, matibabu ya uhandisi. 145 00:07:04,770 --> 00:07:06,950 Ni haijawahi kwenda vizuri sana. 146 00:07:06,950 --> 00:07:09,350 Kwa hiyo, nimeona labda Ningependa kuangalia ndani ya shamba tofauti. 147 00:07:09,350 --> 00:07:12,380 >> KIMBERLY: Katika Green Bay, Wisconsin Mimi nilikuwa mshauri wa shule. 148 00:07:12,380 --> 00:07:16,130 Na mimi kwa kweli nilijua alitaka mabadiliko ya kazi. 149 00:07:16,130 --> 00:07:19,040 >> SAM: Nimesikia mengi ya watu akisema, kama, kila mtu 150 00:07:19,040 --> 00:07:20,190 wanapaswa kujifunza jinsi ya kanuni. 151 00:07:20,190 --> 00:07:22,140 Kila mtu anapaswa kuwa wazi na yake. 152 00:07:22,140 --> 00:07:25,450 Na kabla ya mimi mara tu aina ya kama, eh, chochote. 153 00:07:25,450 --> 00:07:27,790 >> AUSTIN: Mimi nilikuwa na kuchukuliwa muhula mbali. 154 00:07:27,790 --> 00:07:30,700 Na mimi nina sasa kufanya mpango CS50x. 155 00:07:30,700 --> 00:07:34,670 >> Kelli: Ni kupatikana sana kwa mtu yeyote wakati wote. 156 00:07:34,670 --> 00:07:37,100 >> Leanne: Nimekuwa developer katika siku za nyuma. 157 00:07:37,100 --> 00:07:41,630 Lakini nilikuwa na hali na nilitaka na aina ya kuongeza imani yangu, 158 00:07:41,630 --> 00:07:44,550 na nilitaka kujifunza C, na mimi alitaka kujifunza 159 00:07:44,550 --> 00:07:47,754 PHP, ambayo niliona kwamba CS50 alikuwa akifundisha. 160 00:07:47,754 --> 00:07:49,170 AUSTIN: Watu ni kweli kusaidia. 161 00:07:49,170 --> 00:07:50,900 Kuna dhahiri zaidi ya jamii kuliko wewe 162 00:07:50,900 --> 00:07:52,510 kudhani kutoka kwa kozi online. 163 00:07:52,510 --> 00:07:55,745 >> Kelli: mimi nina kazi ya tatizo langu kuweka tano, kwamba mimi tu ya kuanza. 164 00:07:55,745 --> 00:07:59,290 Basi, mimi kupata kufanya forensics kidogo. 165 00:07:59,290 --> 00:08:01,560 >> CHARLES: Imekuwa changamoto. 166 00:08:01,560 --> 00:08:04,470 Ni dhahiri maana kunyoosha mipaka yako. 167 00:08:04,470 --> 00:08:06,210 Mimi nina kazi ya kuweka tatizo tano. 168 00:08:06,210 --> 00:08:09,150 >> KIMBERLY: classmate wangu na mimi ni kufanya kazi katika mradi wetu wa mwisho. 169 00:08:09,150 --> 00:08:11,760 >> SAM: mimi nina kazi ya mradi wangu wa mwisho. 170 00:08:11,760 --> 00:08:15,320 Mimi nimepata watu wengine wawili kazi na mimi, sisi ni Tri-nguvu ya nguvu. 171 00:08:15,320 --> 00:08:21,450 >> Leanne: Mimi najaribu kufanya kazi ya programu iOS kwamba ni ajenda ya kalenda 172 00:08:21,450 --> 00:08:26,100 maombi kwamba mimi alitaka kujenga, tu kwa ajili ya matumizi yangu mwenyewe, kuanza nje na. 173 00:08:26,100 --> 00:08:28,700 >> AUSTIN: Mradi yangu ya mwisho ni kwenda kuwa tovuti ya kwamba 174 00:08:28,700 --> 00:08:31,380 ni mfano na kuona there. 175 00:08:31,380 --> 00:08:35,820 Kimsingi ni kwenda na orodha ya maneno na manufaa 176 00:08:35,820 --> 00:08:38,270 na lugha ya ishara kwa wafanyakazi wa afya. 177 00:08:38,270 --> 00:08:42,440 >> EZRA: Hebu sema mradi wangu wa mwisho ilikuwa bandia kufanya ngoma, 178 00:08:42,440 --> 00:08:49,060 na wao akaniuliza, unaweza kufanya hii bandia kufanya ngoma hii mara mbili kwa haraka? 179 00:08:49,060 --> 00:08:55,270 Napenda kuwa na uwezo wa kwenda na kanuni yangu, mabadiliko ya yake, ila ni, kukusanya, kupakia yake, 180 00:08:55,270 --> 00:08:58,950 na kuonyesha haki yao mbali kwamba Siwezi - kwamba si tu kwamba mimi 181 00:08:58,950 --> 00:09:01,190 kufanya mradi huu wa mwisho, mimi kuelewa. 182 00:09:01,190 --> 00:09:03,480 Naweza tweak hata hivyo wanataka mimi tweak yake. 183 00:09:03,480 --> 00:09:06,400 >> CHARLES: Mimi takwimu mara moja mimi kupata mradi wangu wa mwisho kukamilika 184 00:09:06,400 --> 00:09:08,500 na baadhi ya uwezo waajiri na nafasi 185 00:09:08,500 --> 00:09:11,170 kuangalia kwamba wao itabidi bora tathmini kama wao 186 00:09:11,170 --> 00:09:12,586 nadhani itabidi kuwa na kifafa nzuri kwa ajili yao. 187 00:09:12,586 --> 00:09:17,530 SAM: Sasa mimi nina uhakika sana na mimi nina kujifunza mambo mapya wakati wote. 188 00:09:17,530 --> 00:09:18,980 Na ni kubwa. 189 00:09:18,980 --> 00:09:20,770 Ni iliyopita maisha yangu. 190 00:09:20,770 --> 00:09:24,390 >> EZRA: Hii ni kweli vifaa ngumu, hasa 191 00:09:24,390 --> 00:09:31,110 kama wewe ni kufanya hii na pia kazi, na labda pia kuwa na familia, 192 00:09:31,110 --> 00:09:35,220 na labda pia kuwa na watoto, na labda pia na mikopo. 193 00:09:35,220 --> 00:09:41,340 Lakini ni hivyo thamani yake kama wewe tu kuweka juhudi in 194 00:09:41,340 --> 00:09:47,249 Nini kupata nje ni mengi zaidi thamani kuliko wakati huo kuweka in 195 00:09:47,249 --> 00:09:49,040 DAVID J. Malan: Na sasa, wiki hii katika tech. 196 00:09:49,040 --> 00:09:51,180 Tabia mbaya ni wewe Nimesikia ya kinachojulikana Heartbleed 197 00:09:51,180 --> 00:09:53,670 mdudu, ambayo imeathiri mtandao watumishi duniani kote. 198 00:09:53,670 --> 00:09:55,610 Lakini ni nini hii mdudu, hasa? 199 00:09:55,610 --> 00:09:59,400 Naam, zinageuka kuwa wengi mtandao programu watumishi kukimbia aitwaye wazi 200 00:09:59,400 --> 00:10:02,500 SSL, ambapo SSL bila shaka ni salama matako Tabaka. 201 00:10:02,500 --> 00:10:05,630 Na hii ni teknolojia ambayo encrypts trafiki kati ya kivinjari, 202 00:10:05,630 --> 00:10:07,730 au mteja, na mtandao wa kompyuta. 203 00:10:07,730 --> 00:10:10,640 Sasa kwa bahati mbaya, katika Desemba 2011, programu 204 00:10:10,640 --> 00:10:14,000 ilianzisha mdudu ajali katika chanzo kanuni kwa ajili ya SSL wazi. 205 00:10:14,000 --> 00:10:17,660 >> Na SSL wazi kwa bahati mbaya ni kutumika katika bidhaa nyingine nyingi, 206 00:10:17,660 --> 00:10:20,080 kati yao Apache mtandao wa kompyuta, na wengine, 207 00:10:20,080 --> 00:10:23,260 kwamba ni imekuwa maarufu juu ya internet kwa ajili ya Nje mwenyeji. 208 00:10:23,260 --> 00:10:29,020 matokeo ya hii ni kwamba mashambulizi zifuatazo ni iwezekanavyo. 209 00:10:29,020 --> 00:10:32,430 Kama sehemu ya SSL wazi kuna kinachojulikana moyo kipengele, 210 00:10:32,430 --> 00:10:36,150 ambapo mteja kama browser unaweza kutuma ujumbe au payload, 211 00:10:36,150 --> 00:10:38,630 ambayo ni kweli tu kamba, kama hello, kwa server. 212 00:10:38,630 --> 00:10:40,940 Na pamoja na kwamba payload inapeleka idadi 213 00:10:40,940 --> 00:10:43,400 ambayo inapaswa kuwa urefu wa kwamba payload. 214 00:10:43,400 --> 00:10:45,280 Katika kesi ya hello, ni lazima kuwa na tano. 215 00:10:45,280 --> 00:10:49,060 >> Kwa bahati mbaya, mdudu katika SSL wazi kuendeshwa kama ifuatavyo. 216 00:10:49,060 --> 00:10:50,910 Ni kupuuzwa idadi hiyo. 217 00:10:50,910 --> 00:10:55,020 Na hivyo kama wewe - badala yake, ni kuaminiwa idadi hiyo. 218 00:10:55,020 --> 00:10:59,370 Hivyo kama wewe, mteja, ujumbe kama hello, na si namba 5 219 00:10:59,370 --> 00:11:03,180 lakini namba 100, nini kingetokea ni kwamba server ingekuwa upofu 220 00:11:03,180 --> 00:11:06,200 kukabiliana na kwamba payload na akirejea nyuma si tu hello, 221 00:11:06,200 --> 00:11:10,310 wale ka 5, lakini 95 ziada ka na hivyo kuamini 222 00:11:10,310 --> 00:11:14,340 kwamba walikuwa kuwaambia ukweli wakati alisema kuwa payload kwa kweli 100 223 00:11:14,340 --> 00:11:14,860 ka. 224 00:11:14,860 --> 00:11:16,310 Sasa kwa nini ni kwamba matatizo? 225 00:11:16,310 --> 00:11:18,370 >> Naam, unaweza kukumbuka kutoka CS50, bila shaka, 226 00:11:18,370 --> 00:11:20,610 kutokana na usimamizi kumbukumbu kwamba juu ya stack na chungu 227 00:11:20,610 --> 00:11:24,730 ni mabaki ya data njia, wakati wameweza aitwaye kazi, kutumika kutofautiana, 228 00:11:24,730 --> 00:11:28,580 maadili hayo kukaa katika kumbukumbu hata kama wewe ni tena kikamilifu kwa kutumia 229 00:11:28,580 --> 00:11:29,760 chunks wale wa kumbukumbu. 230 00:11:29,760 --> 00:11:34,890 Hivyo wakati server anajibu si na 5 kuumwa lakini kwa 100 ka, 95 ambayo 231 00:11:34,890 --> 00:11:37,140 si kitaalam zinatakiwa kurudi nyuma kwa mteja, 232 00:11:37,140 --> 00:11:40,820 wale 95 ka kinaweza kuwa na siri, au server ya 233 00:11:40,820 --> 00:11:45,410 vyeti vya usalama, au watumishi funguo siri, hivyo kusema, ambayo yote 234 00:11:45,410 --> 00:11:46,610 hutumiwa kwa ajili ya encryption. 235 00:11:46,610 --> 00:11:49,380 >> Na hivyo hatimaye yako habari inaweza kuwa mitupu nyuma 236 00:11:49,380 --> 00:11:52,157 kwa baadhi adui random kwenye mtandao tu 237 00:11:52,157 --> 00:11:54,240 kwa sababu password yako, au kadi habari, 238 00:11:54,240 --> 00:11:56,120 au kitu kingine kwamba nyeti kilichotokea 239 00:11:56,120 --> 00:11:59,620 kuwa katika kumbukumbu mtandao wa kompyuta ya katika eneo husika. 240 00:11:59,620 --> 00:12:01,630 Sasa hii ilikuwa kubwa mpango huo, kwa sababu hii mdudu 241 00:12:01,630 --> 00:12:03,690 watumishi walioathirika mtandao duniani kote. 242 00:12:03,690 --> 00:12:08,480 Miongoni mwao Amazon Web Services, Box, Dropbox, Etsy, Flickr, GitHub, Gmail, 243 00:12:08,480 --> 00:12:11,950 Go Daddy, Google, Instagram, Minecraft, Netflix, OKCupid, Pinterest, 244 00:12:11,950 --> 00:12:15,760 SoundCloud, Tumblr, Twitter, Venmo, Wikipedia, WordPress, Yahoo, 245 00:12:15,760 --> 00:12:19,030 YouTube - na wale ni tu makampuni, baadhi tu 246 00:12:19,030 --> 00:12:22,720 ya makampuni ambayo kwa kweli wazi kwamba server yao umekuwa ukiendeshwa 247 00:12:22,720 --> 00:12:26,560 programu taabu na alikuwa hivi karibuni tu, kama wiki hii iliyopita, 248 00:12:26,560 --> 00:12:27,790 limesasishwa. 249 00:12:27,790 --> 00:12:31,450 >> Sasa ni zamu nje fix, katika chanzo code kwa, hii mdudu Heartbleed ni kweli 250 00:12:31,450 --> 00:12:32,530 inashangaza rahisi. 251 00:12:32,530 --> 00:12:35,710 Ni pretty much majipu chini kwa mistari hizi mbili ya maadili. 252 00:12:35,710 --> 00:12:39,030 Kama payload ni zaidi ya urefu halisi, kurudi 0. 253 00:12:39,030 --> 00:12:42,680 Je, si kurudi baadhi ya uwezekano wa kufichua bits. 254 00:12:42,680 --> 00:12:45,839 Sasa katika hali halisi ya mistari ya code zilikuwa ngumu kidogo zaidi. 255 00:12:45,839 --> 00:12:47,130 Ni inaonekana kidogo zaidi kama hii. 256 00:12:47,130 --> 00:12:48,720 Lakini hii ni baadhi tu ya hesabu ya ziada 257 00:12:48,720 --> 00:12:50,428 na kulikuwa na watu wachache mistari nyingine ya kificho, 258 00:12:50,428 --> 00:12:52,530 lakini fix kweli ilikuwa rahisi hiyo. 259 00:12:52,530 --> 00:12:54,470 >> Na hivyo kama wewe sijawahi kuamini katika mihadhara 260 00:12:54,470 --> 00:12:57,660 wakati sisi kusema kwamba ni lazima daima kuangalia mipaka ya safu yako 261 00:12:57,660 --> 00:13:00,170 na kuhakikisha na kuangalia urefu wa chunk yoyote ya kumbukumbu 262 00:13:00,170 --> 00:13:03,880 kabla ya upofu apitaye kupitia kumbukumbu ya kompyuta yako, 263 00:13:03,880 --> 00:13:05,320 hii ni nini kinaweza kutokea. 264 00:13:05,320 --> 00:13:08,954 Na kweli imekuwa ni kimataifa matokeo mazuri mdudu. 265 00:13:08,954 --> 00:13:11,620 Sasa nini unaweza mwenyewe kufanya kujifunza zaidi na kujilinda? 266 00:13:11,620 --> 00:13:14,390 Vizuri, kichwa na heartbleed.com, ambayo ni tovuti kali kwamba 267 00:13:14,390 --> 00:13:18,280 anaelezea kwa undani kidogo zaidi hasa nini tishio ni jinsi folks na 268 00:13:18,280 --> 00:13:20,317 alijibu, nini Programu ya wameathirika, 269 00:13:20,317 --> 00:13:21,650 na jinsi gani unaweza kutetea mwenyewe. 270 00:13:21,650 --> 00:13:25,210 Lakini pretty much majipu chini hii - mabadiliko nywila yako, 271 00:13:25,210 --> 00:13:27,585 arguably juu zaidi yoyote tovuti ya kujua kama uhakika 272 00:13:27,585 --> 00:13:29,460 kama kwamba hasa tovuti iliathiriwa. 273 00:13:29,460 --> 00:13:31,560 >> Kwa sababu moja ya scariest mambo kuhusu hii mdudu 274 00:13:31,560 --> 00:13:33,530 ni kwamba si sana auditable. 275 00:13:33,530 --> 00:13:36,580 Ni wazi kama, hata kipindi cha miaka miwili, 276 00:13:36,580 --> 00:13:39,890 server mara katika mazingira magumu, kama wako habari mara kwa hakika kuathirika. 277 00:13:39,890 --> 00:13:42,120 Hivyo kama ni kesi kwa ujumla na usalama, 278 00:13:42,120 --> 00:13:45,350 njia bora ni paranoia na mabadiliko ya nywila yoyote 279 00:13:45,350 --> 00:13:48,320 juu ya tovuti ambazo ni hasa nyeti na wewe. 280 00:13:48,320 --> 00:13:50,990 Lakini kichwa na kwamba URL huko kwa undani zaidi. 281 00:13:50,990 --> 00:13:53,750 >> Sasa katika habari nyingine, Mark Zuckerberg hivi karibuni posted hii. 282 00:13:53,750 --> 00:13:55,470 Mimi nina msisimko na kutangaza kwamba tumekuwa walikubaliana 283 00:13:55,470 --> 00:13:59,260 kupata Oculus VR, kiongozi katika virtual ukweli teknolojia. 284 00:13:59,260 --> 00:14:01,640 Ukweli sasa virtual ni Jambo la kuvutia 285 00:14:01,640 --> 00:14:03,557 hiyo mwanzo kupata kidogo zaidi traction. 286 00:14:03,557 --> 00:14:05,640 Ni kwa ujumla inahusisha kuweka juu ya jozi ya usalama 287 00:14:05,640 --> 00:14:08,960 kwamba ili kuangalia kama haya ndani ya ambayo ni jozi ya lenses kwamba 288 00:14:08,960 --> 00:14:12,335 kuruhusu kuona kompyuta screen haki hadi karibu na uso wako. 289 00:14:12,335 --> 00:14:15,210 Na juu ya kwamba kompyuta screen inaweza kuwa kitu chochote, ndani ya nyumba, 290 00:14:15,210 --> 00:14:18,540 nje ya nyumba, a virtual dunia ndani ya mchezo. 291 00:14:18,540 --> 00:14:22,260 Na matokeo yake ni incredibly nafasi immersive 292 00:14:22,260 --> 00:14:25,594 kujisikia kana kwamba ni kweli mahala fulani kwamba wewe ni kweli si. 293 00:14:25,594 --> 00:14:27,510 Mimi, kwa mfano, huenda kuwa katika chumba mkutano 294 00:14:27,510 --> 00:14:31,230 wakati kwa kweli mimi nadhani nina katika Tron-kama virtual dunia. 295 00:14:31,230 --> 00:14:32,790 Na kwa kweli, mimi alikuwa na nafasi ya. 296 00:14:32,790 --> 00:14:35,623 Mimi si binafsi alicheza na Oculus, lakini mimi kutembelea marafiki zetu 297 00:14:35,623 --> 00:14:38,270 katika Seattle, Washington, hivi karibuni katika Valve programu, ambaye 298 00:14:38,270 --> 00:14:40,860 walikuwa wakifanya kazi kwa sana sawa VR teknolojia. 299 00:14:40,860 --> 00:14:43,140 Na mimi nilikuwa na bahati sana kuwa na nafasi ya 300 00:14:43,140 --> 00:14:47,630 kuweka juu ya jozi yao ya usalama kwa ajili ya sekunde 60 ya hili. 301 00:14:47,630 --> 00:15:48,240 >> [Music kucheza] 302 00:15:48,240 --> 00:15:51,190 >> Sasa, CS50 ya mwenyewe Dan Coffey pia alikuwa na nafasi ya 303 00:15:51,190 --> 00:15:53,590 kuchukua safari ya hivi karibuni katika Mountain View, California, 304 00:15:53,590 --> 00:15:56,360 ambapo alikaa chini pamoja wetu marafiki Dropbox, kati yao 305 00:15:56,360 --> 00:15:59,710 Mwenyewe wa zamani wa mafundisho CS50 ya kichwa wenzake Thomas Carriero, 306 00:15:59,710 --> 00:16:02,140 ambaye ni kuwajibika kwa yote ya nafasi Dropbox 307 00:16:02,140 --> 00:16:03,740 chini ya kiti cha matakia yako. 308 00:16:03,740 --> 00:16:07,100 Thomas kindly sana kufunguliwa milango ya Dropbox na alitupa ya kipekee 309 00:16:07,100 --> 00:16:10,600 nyuma ya pazia nini ni kama kufanya kazi katika Dropbox 310 00:16:10,600 --> 00:16:14,685 na daresay kuishi katika Dropbox. 311 00:16:14,685 --> 00:16:19,040 >> THOMAS Carriero: Hi, mimi nina Thomas Carriero, aliyekuwa CS50 kichwa TF. 312 00:16:19,040 --> 00:16:21,980 Tupo hapa katika makao makuu ya Dropbox katika San Francisco, California. 313 00:16:21,980 --> 00:16:22,490 Karibu. 314 00:16:22,490 --> 00:16:23,490 Mimi naenda kukuonyeshea juu ya ziara. 315 00:16:23,490 --> 00:16:24,031 Kuja na mimi. 316 00:16:24,031 --> 00:16:26,700 317 00:16:26,700 --> 00:16:27,200 Baridi. 318 00:16:27,200 --> 00:16:30,030 Hivyo hii puto hapa, hii ya kijani kuangalia alama, 319 00:16:30,030 --> 00:16:34,020 ni puto kwamba sisi kuweka juu yako dawati wakati wa kwanza kujiunga na kampuni. 320 00:16:34,020 --> 00:16:37,900 Na Wazo ni kwamba puto kukaa aina ya hadi huko kwa muda mrefu 321 00:16:37,900 --> 00:16:38,790 kama wewe ni kukodisha mpya. 322 00:16:38,790 --> 00:16:42,618 Hivyo puto bila shaka kupoteza helium baada ya muda na wakati 323 00:16:42,618 --> 00:16:47,420 puto ni wafu wewe ni tena noob. 324 00:16:47,420 --> 00:16:51,460 Hii inachukua miezi michache kutokea kwa sababu hizi ni kweli, kweli 325 00:16:51,460 --> 00:16:52,560 balloons ghali. 326 00:16:52,560 --> 00:16:57,800 Tunafikiri ili kuweka kuangalia kijani alama ya puto biashara katika biashara. 327 00:16:57,800 --> 00:17:00,230 >> Baridi, hivyo haki hii hapa ni AT & T Park. 328 00:17:00,230 --> 00:17:02,530 Hii ni pale ambapo San Francisco Giants kucheza. 329 00:17:02,530 --> 00:17:08,190 Sisi kwa kweli na Dropbox sanduku Suite, mmoja wetu huduma nyingine kutisha, 330 00:17:08,190 --> 00:17:09,170 tu katika njia. 331 00:17:09,170 --> 00:17:11,479 Basi, mimi nina amesimama na hii kweli baridi mwanga kuonyesha. 332 00:17:11,479 --> 00:17:13,770 Hivyo nini kinaendelea hapa ni sisi ni kupata data muda halisi 333 00:17:13,770 --> 00:17:16,950 kuhusu nini kinatokea katika Mailbox programu yetu. 334 00:17:16,950 --> 00:17:19,960 Kila moja ya rangi sambamba kwa hatua mbalimbali. 335 00:17:19,960 --> 00:17:23,060 >> Na hivyo kama watumiaji ni kufanya hatua hizi, taa haya 336 00:17:23,060 --> 00:17:26,619 ni taa up na rangi wale aina ya hebu kujua nini kinaendelea. 337 00:17:26,619 --> 00:17:30,960 Wakati mwingine kama mambo ni kwenda vibaya, rangi wote kuanza kuwa na rangi moja 338 00:17:30,960 --> 00:17:33,219 na sisi kujua kwamba kitu mbaya kinachotokea. 339 00:17:33,219 --> 00:17:34,968 Hivyo hii ni aina ya moja ya njia ambazo sisi 340 00:17:34,968 --> 00:17:36,676 kuweka wimbo wa nini kinachoendelea katika Mailbox. 341 00:17:36,676 --> 00:17:39,500 342 00:17:39,500 --> 00:17:42,250 >> Baridi, hivyo hebu angalia nini kwa chakula cha jioni usiku wa leo. 343 00:17:42,250 --> 00:17:46,750 Inaonekana kama sisi na saa nane kuvuta nyama brisket hapa. 344 00:17:46,750 --> 00:17:49,310 Na haki hapa ni favorite yangu kituo, kituo cha Hindi. 345 00:17:49,310 --> 00:17:53,500 Ni wazi uso samosa Night leo. 346 00:17:53,500 --> 00:17:55,290 Naam, mimi nadhani kwamba alikuwa kituo cha yangu favorite 347 00:17:55,290 --> 00:17:57,150 lakini hii ni yangu favorite kituo cha wengine. 348 00:17:57,150 --> 00:17:58,440 >> Hiki ni kituo cha pizza. 349 00:17:58,440 --> 00:18:02,180 Hivyo daima kufanya aina tofauti ya pizza na pizza yetu tanuri haki pale. 350 00:18:02,180 --> 00:18:06,330 Inaonekana kama wao ni kufanya Sicilian pizza, ambayo ni moja ya favorites yangu. 351 00:18:06,330 --> 00:18:10,210 Haki ya wote, hivyo chef aliniambia kwamba wao ni freshly alifanya Ho Hos. 352 00:18:10,210 --> 00:18:13,100 Mimi nilimwambia nilikuwa kwenda kusubiri mpaka baada ya mimi d kuliwa karamu yangu 353 00:18:13,100 --> 00:18:15,350 lakini nina dhahiri kwenda kuwa mmoja wa wale usiku wa leo. 354 00:18:15,350 --> 00:18:19,323 OK, mimi nina kwenda na yangu sasa. 355 00:18:19,323 --> 00:18:19,823 Halisi nzuri. 356 00:18:19,823 --> 00:18:23,290 357 00:18:23,290 --> 00:18:26,690 >> Hivyo hii ni aina ya kituo cha ziada kwamba nje ya duka tech. 358 00:18:26,690 --> 00:18:29,850 Kwa chakula cha mchana tuna Mexico chakula hapa na sushi hapa. 359 00:18:29,850 --> 00:18:34,050 Na kwa chakula cha jioni tuna baadhi nyama aina ladha. 360 00:18:34,050 --> 00:18:37,340 Inaonekana kama kuchoma nyama ya nguruwe loin usiku wa leo. 361 00:18:37,340 --> 00:18:40,785 Kupata close up juu ya hilo. 362 00:18:40,785 --> 00:18:42,160 Baridi, hivyo hii ni ya kubuni eneo letu. 363 00:18:42,160 --> 00:18:44,810 Hii ni pale sisi kubuni kundi la bidhaa. 364 00:18:44,810 --> 00:18:47,480 Sisi wana kura ya furaha bodi bango na stuff, 365 00:18:47,480 --> 00:18:50,320 na aina ya kumtania wote kwamba sisi ni kazi. 366 00:18:50,320 --> 00:18:53,380 Sisi pia kuwa pamoja ardhi rundo la kumtania 367 00:18:53,380 --> 00:18:56,130 kwamba sisi tumekuwa kufanya kazi juu ya zaidi ya miaka. 368 00:18:56,130 --> 00:18:58,490 Hivyo unaweza kupata karibu up ya kwamba katika pili. 369 00:18:58,490 --> 00:19:01,550 >> Lakini dalili hii ni moja ya yangu mambo favorite kuhusu Dropbox. 370 00:19:01,550 --> 00:19:03,650 Hivyo ishara hii kwa kweli alikuja kutoka ofisi ya zamani. 371 00:19:03,650 --> 00:19:05,520 Na kauli mbiu yetu ni, ni kazi tu. 372 00:19:05,520 --> 00:19:10,310 Lakini kama wewe kuangalia kwa makini, kuna ujumbe subliminal katika ishara. 373 00:19:10,310 --> 00:19:14,630 >> Hivyo moja ya sehemu favorite yangu kuhusu Dropbox ni vending mashine hizo. 374 00:19:14,630 --> 00:19:17,630 Badala ya kuwa na chips au soda au kitu kama hicho, 375 00:19:17,630 --> 00:19:19,270 sisi kweli kuwa umeme. 376 00:19:19,270 --> 00:19:24,360 Hivyo kama unahitaji trackpad mpya, au keyboard mpya, au baadhi headphones, 377 00:19:24,360 --> 00:19:27,160 wote unahitaji kufanya ni swipe beji wako wa kulia hapa. 378 00:19:27,160 --> 00:19:30,140 Aina katika idadi na kisha nje anakuja umeme yako. 379 00:19:30,140 --> 00:19:30,780 Pretty kutisha. 380 00:19:30,780 --> 00:19:33,029 Asante sana kwa kujiunga na yangu juu ya ziara hii ya Dropbox. 381 00:19:33,029 --> 00:19:35,230 Imekuwa ni kweli na furaha kuonyesha kote. 382 00:19:35,230 --> 00:19:37,800 >> Mimi naenda kuifunga hii nje kwa njia ya sisi karibu nje 383 00:19:37,800 --> 00:19:40,000 yote ya mikutano yetu mikono yote. 384 00:19:40,000 --> 00:19:41,690 Hii ni chant maalum sisi kufanya. 385 00:19:41,690 --> 00:19:44,050 Je, mimi kupata msaada hapa? 386 00:19:44,050 --> 00:19:47,800 Moja, mbili, tatu - Dropbox! 387 00:19:47,800 --> 00:19:49,370 Ni kawaida baridi sana zaidi ya hiyo. 388 00:19:49,370 --> 00:19:57,986 389 00:19:57,986 --> 00:20:00,110 DAVID J. Malan: Sasa kama Ningependa kutembelea Dropbox, 390 00:20:00,110 --> 00:20:04,570 kichwa kwa Mountain View, California, hop juu ya Njia ya 101 kaskazini kwa San Francisco, 391 00:20:04,570 --> 00:20:06,110 ambapo kwa kweli ni. 392 00:20:06,110 --> 00:20:07,930 Sasa tumekuwa pia alikuwa na nafasi hivi karibuni 393 00:20:07,930 --> 00:20:11,160 kusafiri kwa Las Vegas, Nevada kwa show NAB, 394 00:20:11,160 --> 00:20:13,390 Chama cha Taifa cha kwa Watangazaji kuonyesha, 395 00:20:13,390 --> 00:20:16,160 ambayo huleta pamoja baadhi Watu 100,000 nia ya 396 00:20:16,160 --> 00:20:18,770 katika redio na video na teknolojia kwa ujumla zaidi 397 00:20:18,770 --> 00:20:21,160 kuzungumza kuhusu sana karibuni na mkuu. 398 00:20:21,160 --> 00:20:24,175 >> CS50 ya mwenyewe Ramon Galvin alichukua safari hii na kuletwa pamoja naye 399 00:20:24,175 --> 00:20:28,816 kamera wafanyakazi ili hii Footage kutoka ghorofa ya show ya. 400 00:20:28,816 --> 00:20:29,941 RAMON GALVIN: Hello, dunia. 401 00:20:29,941 --> 00:20:31,785 OK, I got. 402 00:20:31,785 --> 00:20:32,710 Hello, dunia. 403 00:20:32,710 --> 00:20:34,634 Je, mimi kusema jina langu? 404 00:20:34,634 --> 00:20:37,474 >> Mpiga picha: Mwandishi katika shamba. 405 00:20:37,474 --> 00:20:39,390 RAMON GALVIN: Je, mimi kupata tatu chini ya kwamba? 406 00:20:39,390 --> 00:20:43,329 Habari katika shamba. 407 00:20:43,329 --> 00:20:44,689 >> Mpiga picha: Senior. 408 00:20:44,689 --> 00:20:45,814 RAMON GALVIN: Kuna kwenda. 409 00:20:45,814 --> 00:20:53,280 410 00:20:53,280 --> 00:20:55,632 Mimi najua, lakini nina kufanya hivyo. [Inaudible]. 411 00:20:55,632 --> 00:21:08,082 412 00:21:08,082 --> 00:21:09,078 Mimi nina clueless. 413 00:21:09,078 --> 00:21:14,580 414 00:21:14,580 --> 00:21:16,474 >> Sasa ni prima donna yangu pose. 415 00:21:16,474 --> 00:21:35,397 416 00:21:35,397 --> 00:21:37,230 DAVID J. Malan: Na wanaendelea kutaja 4k. 417 00:21:37,230 --> 00:21:40,080 4k ni nini hasa? 418 00:21:40,080 --> 00:21:42,884 >> RAMON GALVIN: Hiyo ni mzuri swali. 419 00:21:42,884 --> 00:21:43,550 Sana kimsingi - 420 00:21:43,550 --> 00:21:46,017 >> DAVID J. Malan: Kata kwa kipande cha picha ya kueleza 4k. 421 00:21:46,017 --> 00:21:53,472 422 00:21:53,472 --> 00:21:54,410 Hello, dunia. 423 00:21:54,410 --> 00:21:55,749 Jina langu ni David Malan. 424 00:21:55,749 --> 00:21:57,040 RAMON GALVIN: Mimi Ramon Galvin. 425 00:21:57,040 --> 00:21:59,225 DAVID J. Malan: Na tuko hapa katika NAP, Chama cha Taifa cha 426 00:21:59,225 --> 00:22:01,620 ya Watangazaji mkutano katika Las Vegas, Nevada. 427 00:22:01,620 --> 00:22:02,680 Lakini kwa nini sisi hapa? 428 00:22:02,680 --> 00:22:03,804 RAMON GALVIN: Mimi sijui. 429 00:22:03,804 --> 00:22:05,270 Sijui, David. 430 00:22:05,270 --> 00:22:07,040 >> DAVID J. Malan: Hiyo ilikuwa nzuri sana. 431 00:22:07,040 --> 00:22:08,270 Je, hii ni usable? 432 00:22:08,270 --> 00:22:10,572 >> RAMON GALVIN: Pengine si. 433 00:22:10,572 --> 00:22:12,655 DAVID J. Malan: Tuko nyuma, kama ni CS50 ya mwenyewe Ramon 434 00:22:12,655 --> 00:22:16,010 Galvin, unaweza ambao kukumbuka kutoka sehemu wiki iliyopita. 435 00:22:16,010 --> 00:22:17,820 Ramon, nimefurahi wewe ni kweli nyuma. 436 00:22:17,820 --> 00:22:19,230 >> RAMON GALVIN: Mimi nina furaha bado wana kazi, David. 437 00:22:19,230 --> 00:22:21,105 >> DAVID J. Malan: Basi hebu kushughulikia tembo 438 00:22:21,105 --> 00:22:22,980 kwamba alikuwa katika chumba katika Las Vegas, yaani 4k. 439 00:22:22,980 --> 00:22:25,820 Nimesikia kuhusu huu katika mazingira ya TV na wachunguzi wa kompyuta, 440 00:22:25,820 --> 00:22:27,490 lakini nini ni 4k? 441 00:22:27,490 --> 00:22:28,970 >> RAMON GALVIN: Hivyo ni azimio. 442 00:22:28,970 --> 00:22:31,570 Kila wewe ni kuangalia kutembea kwa njia ya video au hotuba 443 00:22:31,570 --> 00:22:33,670 kupata nini sisi kuwaita 1080p video. 444 00:22:33,670 --> 00:22:37,605 Nini maana ya kwamba video ni 1,000, saizi mrefu. 445 00:22:37,605 --> 00:22:38,680 >> DAVID J. Malan: Au 1080. 446 00:22:38,680 --> 00:22:39,596 >> RAMON GALVIN: Au 1080. 447 00:22:39,596 --> 00:22:42,620 Au takribani 2,000, saizi kote. 448 00:22:42,620 --> 00:22:49,329 Sasa 4k ni 4,000, saizi mbalimbali, takribani, na takribani 2,000, saizi mrefu. 449 00:22:49,329 --> 00:22:50,120 DAVID J. Malan: OK. 450 00:22:50,120 --> 00:22:53,950 Basi hiyo ni aina ya kama kuwa na gridi ya wachunguzi nne 1080p 451 00:22:53,950 --> 00:22:55,040 haki mbele yenu. 452 00:22:55,040 --> 00:22:55,956 >> RAMON GALVIN: Hasa. 453 00:22:55,956 --> 00:22:59,310 DAVID J. Malan: OK, ili wote faini na nzuri lakini kwa nini hii ni muhimu? 454 00:22:59,310 --> 00:23:01,325 >> RAMON GALVIN: Mimi nina furaha aliuliza wewe kuuliza swali hilo, David. 455 00:23:01,325 --> 00:23:03,080 >> DAVID J. Malan: Ni juu ya teleprompter. 456 00:23:03,080 --> 00:23:04,996 >> RAMON GALVIN: Hivyo kuna documentarian jina lake 457 00:23:04,996 --> 00:23:08,180 Errol Morris kwamba kweli inafanya matumizi ya 4k teknolojia. 458 00:23:08,180 --> 00:23:10,820 Kawaida kwa risasi mahojiano, ambayo yeye kawaida gani, 459 00:23:10,820 --> 00:23:14,100 yeye ingekuwa ama matumizi mbalimbali kamera kupata zoomed shuti 460 00:23:14,100 --> 00:23:17,290 au zoomed nje risasi, au risasi mahojiano mara mbili 461 00:23:17,290 --> 00:23:19,850 kwa kupata huo zoomed katika, zoomed nje risasi. 462 00:23:19,850 --> 00:23:25,890 Hata hivyo, sasa yeye ni kutumia 4k kamera kwa risasi moja kubwa 4k risasi. 463 00:23:25,890 --> 00:23:30,157 Na kisha wakati yeye editing, artificially mseto kwamba risasi. 464 00:23:30,157 --> 00:23:31,990 DAVID J. Malan: Na zooming katika, kimsingi, 465 00:23:31,990 --> 00:23:35,600 kukupa bado 1080p lakini tu baadhi ya saizi kutoka 4k picha. 466 00:23:35,600 --> 00:23:38,720 >> RAMON GALVIN: Hasa, kutoa naye shots nyingi kamera 467 00:23:38,720 --> 00:23:40,262 nje ya kwamba asili moja kamera risasi. 468 00:23:40,262 --> 00:23:41,428 DAVID J. Malan: kuvutia. 469 00:23:41,428 --> 00:23:43,370 Hivyo ni jinsi gani sisi kufanya matumizi ya hii kwa CS50? 470 00:23:43,370 --> 00:23:46,160 >> RAMON GALVIN: Nina furaha aliuliza swali hilo, pia, David. 471 00:23:46,160 --> 00:23:50,500 Kwa sababu mimi risasi kutembea kwa njia ya video kwa Zamyla mwisho muhula. 472 00:23:50,500 --> 00:23:53,015 Na kwa wale videos tunataka na kukimbia kwa njia ya kutembea 473 00:23:53,015 --> 00:23:55,240 kupitia mara moja kwa zoomed nje risasi. 474 00:23:55,240 --> 00:23:59,390 Na kisha Ningependa kuwa na kurekebisha kamera kupata zoomed katika risasi. 475 00:23:59,390 --> 00:24:03,130 Na kisha tunatarajia kukimbia kwa njia hiyo tena, mbio kwa njia hiyo mara mbili. 476 00:24:03,130 --> 00:24:05,484 Pamoja na 4k kamera tunaweza kupunguza uzalishaji wetu wakati katika nusu. 477 00:24:05,484 --> 00:24:06,400 DAVID J. Malan: Mimi naona. 478 00:24:06,400 --> 00:24:09,244 Hivyo kwamba wanapaswa kuwa ya kusisimua kabisa kwa ajili yetu, basi, hii kuanguka. 479 00:24:09,244 --> 00:24:10,160 RAMON GALVIN: Hasa. 480 00:24:10,160 --> 00:24:11,200 DAVID J. Malan: Naam, kutoka inaonekana ya video 481 00:24:11,200 --> 00:24:13,660 inaonekana kama ni mara pretty kuchoka safari. 482 00:24:13,660 --> 00:24:16,307 Inaonekana kama alivyofanya si kweli na muda mwingi wa kupumzika. 483 00:24:16,307 --> 00:24:17,390 RAMON GALVIN: Si hata kidogo. 484 00:24:17,390 --> 00:24:20,084 485 00:24:20,084 --> 00:24:22,000 DAVID J. Malan: Naam, hiyo ni kwa CS50 Live. 486 00:24:22,000 --> 00:24:23,830 Shukrani kwa kiasi hii wachangiaji wiki iliyopita. 487 00:24:23,830 --> 00:24:25,870 Shukrani kwa kiasi timu ya nyuma kamera. 488 00:24:25,870 --> 00:24:27,880 Asante sana kwa mwandishi wetu - 489 00:24:27,880 --> 00:24:28,755 RAMON GALVIN: Senior. 490 00:24:28,755 --> 00:24:30,880 DAVID J. Malan: Senior Habari katika shamba. 491 00:24:30,880 --> 00:24:32,880 Hii ilikuwa CS50. 492 00:24:32,880 --> 00:24:35,480 >> RAMON GALVIN: Na hii ni kitu, sijui nini. 493 00:24:35,480 --> 00:24:38,030 >> DAVID J. Malan: Ilikuwa ni mavazi yetu mazoezi. 494 00:24:38,030 --> 00:24:39,230 Ili wote sauti kubwa. 495 00:24:39,230 --> 00:24:42,030 TV kubwa, zaidi saizi, azimio zaidi. 496 00:24:42,030 --> 00:24:43,740 Lakini kwa nini hii ni kweli muhimu? 497 00:24:43,740 --> 00:24:45,240 >> RAMON GALVIN: Nina furaha wewe aliuliza swali hilo, David. 498 00:24:45,240 --> 00:24:48,110 >> DAVID J. Malan: Nina furaha aliuliza - Mimi nina furaha aliuliza wewe kuuliza mimi hiyo. 499 00:24:48,110 --> 00:24:50,060 >> RAMON GALVIN: Hapana, mimi kusema mimi nina glad you akaniuliza swali. 500 00:24:50,060 --> 00:24:52,220 Na kisha unasema vizuri ni katika mnong'oni. 501 00:24:52,220 --> 00:24:54,149 Mimi nina furaha aliuliza wewe kuuliza swali hilo. 502 00:24:54,149 --> 00:24:56,190 DAVID J. Malan: Naam, ni katika mnong'oni huko. 503 00:24:56,190 --> 00:24:56,870 RAMON GALVIN: Nina furaha wewe - 504 00:24:56,870 --> 00:24:57,840 DAVID J. Malan: Nadhani ni funnier kama wewe tu kusema, 505 00:24:57,840 --> 00:24:59,852 Mimi nina furaha aliuliza wewe kuuliza swali hilo. 506 00:24:59,852 --> 00:25:02,060 Kwa sababu ni aina ya kucheza juu ya nini ungependa kutarajia. 507 00:25:02,060 --> 00:25:02,990 >> RAMON GALVIN: OK. 508 00:25:02,990 --> 00:25:05,750 Nina furaha wewe akaniuliza kuuliza swali hilo, David. 509 00:25:05,750 --> 00:25:06,780 Kuna documentarian. 510 00:25:06,780 --> 00:25:08,738 >> DAVID J. Malan: Nina furaha Mimi aliuliza kuuliza mimi. 511 00:25:08,738 --> 00:25:11,600 RAMON GALVIN: Mimi nina furaha aliuliza kuuliza swali hilo. 512 00:25:11,600 --> 00:25:39,627 >> [Muziki-keki, "umbali"]