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Curs 32013/2014
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Capacitate de informare =
Nota Tema
curs 6, prezenta obligatorie, 25% din nota
-
Test 1 referinţă
C2
Test 2 verificare
C6
Interesare subiect ?Nota
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Nr Nume Grupa Subiect Rezultat % [38]
1 BEJENARI DACIAN 5101 2 12 32
2 BOICU PAUL 5101 1 17 45
3 LUNGU NARCIS IUSTIN 5101 37 13 34
4 PINZARIU MARINA 5101 4 20 53
5 SERBAN IULIAN MIHAI 5101 13 19 50
6 SEVERIN IONUT 5101 3 16 42
7 TEACU ALEXANDRU 5101 12 17 45
8 CIOBANU CEZAR ADRIAN 5102 28 13 34
9 MIHALIUC SERGIU 5102 32 15 39
10 NITA CATALIN 5102 25 16 42
11 PANAITE STEFAN 5102 38 16 42
12 PRICOP PAUL 5102 26 9 24
13 VALEANU IOANA 5102 27 10 26
14 BURAGA ALEXANDRU 5103 31 10 26
15 CARCALETE ADRIAN 5103 35 7 18
16 CIOBANU STEFAN 5103 21 11 29
17 COZMANIUC ALEX 5103 36 9 24
18 DIACONITA TIBERIU CONSTANTIN 5103 17 6 16
19 DOBREA ANDREEA DANIELA 5103 20 20 53
20 FEDELES LAURA 5103 15 16 42
21 ICHIM NICOLETA ANDREEA 5103 34 17 45
22 IGNEA MIHAI 5103 29 8 21
23 TODEREANU ALEXANDRU IOAN 5103 30 20 53
Valoare medie
13.9 36.5
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http://rf-opto.etti.tuiasi.ro Pagina in limba romana ≠ Pagina in limba engleza
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Intel® Itanium® processors (codenamed Tukwila)
2 miliarde tranzistoarepe CPU
>3 miliarde operatii pesecunda
Nivel redus de complexitate al operatiilor elementare
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Open Systems Interconnection Structura stratificata pe 7 nivele
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IP – Internet Protocol HTTP – Hyper Text Transfer Protocol FTP – File Transfer Protocol TCP – Transport Control Protocol SMTP – Simple Mail Transfer Protocol POP3 – Post Office Protocol IMAP – Internet Message Access Protocol Telnet – Telecommunication network
(remote login)
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LAN – Local Area Network acopera distante
maxim de ordinulkm
WAN – Wide Area Network poate acoperi
intreaga lume Internetul e cea
mai mare WAN
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LAN – Local Area Network WAN – Wide Area Network HAN – Home Area Network MAN – Metropolitan Area Network CAN – Campus Area Network SAN – Storage Area Network Enterprise Private Network VPN – Virtual Private Network
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Stea: toate nodurile sunt conectate la un nod central numit hub (switching hub)
Hub
C1
C2
C3I1
S1
“Hub”/”Switch”
“Ruter”
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Bus – toate nodurile sunt conectate la un singur cablu
obligatoriu trebuie sa apara terminatoare la capat
C1 C2 C3 C4 I1 S1
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Inel – toate nodurile sunt conectate la un singur cablu care realizeaza un inel
teminatoarele nu sunt necesare
C1
C2
C3
C4
I1
S1
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Topologiile de retea
toate topologiile sunt utilizate in retele WAN
topologia STEA predomina in retele LAN
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Cablu
Coaxial: 185 m, 10 Mb/s
UTP – Unshielded twisted pair: 100 m,
▪ Cat 5 100 Mb/s (5e – 1000Mb/s)
▪ Cat 6 1000 Mb/s (6e – 10000Mb/s)
STP – Shielded twisted pair: distanta mai mare
fibra optica
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Conectori
BNC – Bayonet Neill Concelman
RJ45 – UTP
RJ22 – Telefonie (RJ11)
FDDI – Fibra optica
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Cablu Ethernet
Conectare calculator –switch, calculator modem
Ethernet Crossover
Conectare directa intre2 calculatoare
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NIC –Network Interface Card – placa de retea 10Mb/s, 100Mb/s , 1000Mb/s Ethernet RJ45
Modem 56 kb/s RJ22 Inlocuit de Cable Modem Aplicatii Fax!
Viteze de acces garantat best effort
▪ tipic, pentru aplicatii v[B/s] ~ v[b/s] / 10
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Cablu
Wireless
Fibra optica
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Wi-Fi - 2.4 GHz 802.11a,b,g,n b – 11Mb/s, 32m
g – 55 Mb/s, 32 m
n – 300Mb/s, 64m securitate WEP, WPA, WPA2
MIMO Multiple Input Multipple Output
Gain – la antena arata directivitatea
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GSM
3G/3G+ 3.6 Mb/s
EDGE 220 kb/s
GPRS 60~80 kb/s (20 kb/s /slot)
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Web E-mail Forum FTP Chat Instant messaging RSS feeds Internet Time P2P
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Browser, HTML
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to browse = a rasfoi Mosaic – primul browser grafic –
1.0 – XI.1993 Netscape 1.0 – 1994
4.5,4.79 – X.1998, XI.2001
7-9 … Mozilla Firefox Internet Explorer 1.0 – 1995
Curent: 9.0, (9.0-1, 8.0-2)
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Opera 2.1 – XII.1996 Curent: 12.0, (11.5-1, 11.0-2) Opera mini: 7.0 (6.5-1, 5-2) Opera Mobile 12.0 (11.5-1, 10-2)
Firefox Mozilla 1.0 – XI.2004 Curent: 16.0, (8.0-1, 3.6-2)
Google Chrome Curent 22.0, (15.0-1, 8.0-2)
Safari Apple -
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Statistici
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Internet Explorer 7, 26.3
0%
Internet Explorer 6, 22.3
0%
Chrome, 3.10%
Firefox , 42.60%
Mozilla, 0.50%
Safari, 2.70%
Opera, 2.00%
Other, 5.20%
Utilizatori avansati
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Internet Explorer , 72.22%
Firefox , 19.48%
Safari , 6.39%
Opera , 0.71%
Netscape , 0.68%
Chrome , 0.26%
Mozilla , 0.09%
Opera Mini , 0.05%Playstation , 0.04%Konqueror , 0.02%
Other, 1.85%
Total utilizatori
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IE8, 12.80%
IE7, 14.10%
IE6, 10.60%
Firefox, 47.50%
Chrome, 8.00%
Safari, 3.80%
Opera, 2.30%
Other, 14.10%
Utilizatori avansati
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Total utilizatori
Internet Explorer , 64.51%
Firefox , 24.15%
Safari , 4.44%
Chrome , 3.60% Opera , 2.18%
Netscape , 0.33%
Mozilla , 0.11%
Other, 2.62%
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Utilizatori avansati
Internet Explorer , 16.40%
Firefox , 32.20%
Safari , 4.20%
Chrome , 44.10%
Opera , 2.10%
Netscape , 0.68%
Others, 1.00%
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Total utilizatori
Internet Explorer , 54.13%
Firefox , 19.99%Safari , 5.21%
Chrome , 18.55%
Opera , 1.63%
Prop/Und., 0.26%
Mozilla, 0.04%
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Source ChromeInternet Explorer
Firefox Safari Opera Other
StatCounter 33.59% 32.85% 22.85% 7.39% 1.63% 1.69%
NetApplications 19.13% 53.60% 20.05% 5.10% 1.58% 0.54%
W3Counter 28.30% 27.60% 22.80% 14.40% 2.20% 4.70%
Wikimedia 34.02% 28.94% 23.51% 6.39% 3.76% 3.38%
Clicky 29.84% 36.35% 22.64% 9.78% 1.23% 0.14%
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Afisare
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Motoare de cautare 2009 (International)
▪ Google (89.8%)
▪ Yahoo (5.15%)
▪ Bing (3.27%)
2011 (International)▪ Google (91.1%)
▪ Bing (3.63%)
▪ Yahoo (3.56%)
2012▪ similar
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SEO
Search Engine Optimization
RobotiBaza de
dateServerClient
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AND SI logic Cuv_1 AND Cuv_2 + Cuv_1 +Cuv_2
OR SAU logic Cuv_1 OR Cuv_2
NOT NEGARE logica Cuv_1 AND NOT Cuv_2 + Cuv_1 -Cuv_2
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NEAR
apropiere in pagina
Cuv_1 NEAR Cuv_2
Fraza
“Cuv_1 Cuv_2 …. Cuv_n”
Operator implicit AND
Cuv_1 Cuv_2 = Cuv_1 AND Cuv_2
Cautare avansata
Interfata web pentru introducerea acestor parametri
Se pot introduce si alte optiuni
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Folositi termeni/expresii univoci film thin film technology
Incercati sa gasiti un termen care sa fie propriunumai informatiei cautate
Do not feel lucky!!! (lucky = lazy) Nu cautati in limba romana utilizati limba engleza sau chineza
E mai importanta identificareaunui site utilizabil decat a informatiei punctuale cautate
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Estimati identitatea reala a celui care posteaza Estimati competenta celui care posteaza Estimati credibilitatea celui care posteaza Verificati informatia dobandita
Cross-check
Gasiti informatie cu acelasi sens la alte surseidentificabile, credibile, competente
Dupa identificarea unei surse valide, cautati in acel loc si alte informatii valide din domeniul de interes
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Evaluarea cat mai corecta a identitatii reale a furnizorului de informatie Oricine poate posta public orice informatie Oricine isi poate aroga orice identitate
▪ In anumite locuri (? free) Posibilitati de verificare Nume de domeniu
▪ ETTI Iasi -> etti.tuiasi.ro
Adrese de email▪ …[email protected]
Verificarea apartenentei prin accesarea domeniului“parinte”▪ www.etti.tuiasi.ro -> www.tuiasi.ro
▪ kovlerdaily.wordpress.com/ -> www.wordpress.com (? free)
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Estimarea cat mai corecta a competenteifurnizorului de informatii
Centru de cercetare in diabet in tari dezvoltate
Spital universitar in tari dezvoltate
Spital public
Spital/cabinet medical privat
Organizatie non medicala
Public/Forum
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Detectarea “conflictului de interese” in cazulfurnizorului de informatii
Firme care activeaza in domeniu (~)
▪ Informatii despre insulina mai credibile la o firma care produce aparatura pentru injectii
▪ Informatii despre aparatura pentru injectii mai credibile la o firma care produce insulina
Informatii mai credibile la o firma mare in domeniu
▪ “numele” cantareste mai mult decat eventuala publicitate
Prezenta reclamelor generale (Google adSense) pesite (?)
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Madonna – Like a prayer (versuri)
Madonna – 91.500.000
Madonna Prayer – 2.880.000
+Madonna +Prayer – 2.580.000
+Madonna +Prayer –religion – 98.500
+Madonna +”Like a prayer” – 818.000
+Madonna +”Like a prayer” +lyrics – 144.000
▪ Toate din primele 10 rezultate contin informatia cautata
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Diabet, semne de cetoacidoza
diabet (RO) – 6.530.000 (0.24s)
diabetes (ENG) – 277.000.000 (0.14s)
http://translate.google.com
▪ Rezultate bune pentru cuvinte
▪ cetoacidoza -> ketoacidosis
Diabetes AND ketoacidosis
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Diabet, semne de cetoacidoza
diabetic OR ketoacidosis OR signs – 653.000.000
Diabetes AND ketoacidosis
▪ diabetes ketoacidosis – 8.380.000 (0.19s)
▪ diabetic ketoacidosis – 1.340.000 (0.1s)
▪ diabetic ketoacidosis signs – 10.900.000
▪ +diabetic +ketoacidosis +signs – 10.900.000
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Diabet, semne de cetoacidoza
"diabetic ketoacidosis signs" – 17.400
"diabetic ketoacidosis signs and symptoms" –7.060
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Rezultatesponsorizate De obicei ofera mai
putine informatii utile d.p.d.v. psihologic,
evitate de utilizatori(conflict de interese)
Recunoscute prin faptul ca: URL-ul contine numai numele de domeniu “www.site.com” (fara
“/fisier.htm”) Sub rezultat exista un slogan comercial, nu un citat din pagina
respectiva
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Diabet, semne de cetoacidoza
"diabetic ketoacidosis signs and symptoms“ –7.060
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Laboratorul de microunde si optoelectronica http://rf-opto.etti.tuiasi.ro [email protected] tema de acasa, curs 6, prezenta obligatorie,
25% din nota