Thesis full text PDF (in Italian) - Politecnico di Milano

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4.7 Structure of the database In order to memorize the quantitative data daily collected from the differentsocials networks, a database called “socialDB” has been created.The definition of the tables has been done taking into consideration theinformation that the APIs was able to extract.During the data analysis, taking into consideration temporal aspects, moreimportant in order to construct the history charts, two main type of informationhas been identify:1. Data with temporal references2. Data without temporal referencesFor the first category thanks to the availability of the creation time, the applicationsimply memorizes the date with the related information into the specific table,while, for the second, a particular schema has been adopted in order to memorizetemporal variations of the value observed (see fig. 17).id * object_id date value type_valueFigure 17 - Schema of the table adopted for memorize data without temporal referencesTuples, into this type of tables, are inserted as follow (see also fig. 18):ü The fist time the object is crawled, the field “type_value” is set to “init”,and “value” contains the real numerical data collected.ü For each subsequent updates, related to the same object, the field“type_value” is set to “update” and “value” contains the upgrade(difference between the new numerical data collected and the sum of allthe previous values inserted with the same object id).58
Figure 18 - Example of table containing data withouttemporal referencesDespite more data collected has been required the same table schema, due to thelarge amount of tuples inserted in it, the solution adopted was that to keepseparate tables containing different types of information.59
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POLITECNICO DI MILANOFacoltà di In
Page 5 and 6:
SOMMARIO Negli ultimi anni, la diff
Page 7 and 8:
ABSTRACT The online social networks
Page 9 and 10: 1 INTRODUCTION In the last five yea
Page 11 and 12: elated to the user selected, resumi
Page 13 and 14: 2 BACKGROUND 2.1 Online social ne
Page 15 and 16: After the subscription to an online
Page 17 and 18: 2.2 Socials networks: some examp
Page 19 and 20: Other important features provided b
Page 21 and 22: Others mains features provided by t
Page 23 and 24: Introduce social BPM into a company
Page 25 and 26: online meetings (wiki meeting).Due
Page 27 and 28: 2.4 Analysis on social network T
Page 29 and 30: The high coefficient of local user
Page 31 and 32: 2.4.3 Modelling relationship stre
Page 33 and 34: 3 MAIN CONTRIBUTIONS Nowadays, the
Page 35 and 36: 3.1 User’s real-‐time updat
Page 37 and 38: 3.2 The “unified visibility pa
Page 39 and 40: user during the registration phase
Page 41 and 42: ss_slide_vis_wg 3 fb_photo_tag_vis_
Page 43 and 44: The following table (fig. 11) shows
Page 45 and 46: 3.3 Rendering temporal charts Tem
Page 47 and 48: As mentioned before, another way in
Page 49 and 50: Unified visibilitypanel1A page, wit
Page 51 and 52: ü Twitter: a micro blogging social
Page 53 and 54: ü Log of information and errors: t
Page 55 and 56: 4.4 Structure of the web applic
Page 57 and 58: 4.5 Data storage In order to store
Page 59: ü Tag PROFILES: node element that
Page 63 and 64: Figure 19 - YouTube’s content tab
Page 65 and 66: Figure 21 - Twitter’s tables crea
Page 67 and 68: ü fb_group: memorizes the number o
Page 69 and 70: Into “util”, others sub-package
Page 71 and 72: First registration phaseThe sequenc
Page 73 and 74: Figure 25, shows the sequences of o
Page 75 and 76: Second registration phaseThe memori
Page 77 and 78: 5. The Facebook’s server response
Page 79 and 80: 2. A request for the page “UserYt
Page 81 and 82: When the job is triggered, the meth
Page 83 and 84: 5 EXPERIMENTS AND EVALUATIONS In o
Page 85 and 86: 5.1 Politics and social networks
Page 87 and 88: Evidence on the use of social netwo
Page 89 and 90: independently by the last upload, r
Page 91 and 92: 5.3 Connection between profiles N
Page 93 and 94: interconnected the two social netwo
Page 95 and 96: By introducing the concept of socia
Page 97 and 98: 6.2 Future developments At the cur
Page 99 and 100: BIBLIOGRAPHY [1] Wikipedia - WEB 2.
Page 101: [27] SlideShare - SlideShare API -
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Thesis full text PDF (in Italian) - Politecnico di Milano

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