Date post: | 19-Jan-2016 |
Category: |
Documents |
Upload: | marshall-park |
View: | 215 times |
Download: | 1 times |
1
SOCIAL NETWORKINGNazia Hassan
Usman Kamran
Sophia Hasan
Fahad Zafar
2
SOCIAL NETWORKING
Process of building online communities that allows greater interactions on website through: Groups Networks
Social Networking sites: Facilitate friendly and active interactions with
members. Versatile ways to interact with each other like:
Instant messaging Video calling Chat File sharing Discussion groups Voice chats Emails Blogging etc
3
VIDEO
What is social networking in plain English.
4
SOCIAL NETWORKS
Unlike the Web, which is largely organized around content, online social networks are organized around users Users:
Join a network Publish their profiles and related
content Create links to others whom they
associate themselves The resulting social network
provides basis for: Maintaining social relationships Finding users with similar interests Locating content and knowledge
endorsed by other users
5
WHY STUDY SOCIAL NETWORKS
Shared interest and trust Adjacent users:
Tend to trust each other Tend to have common interests
Impact on future internet Impact on other disciplines Browsing patterns shows interest of users
6
SOCIAL NETWORKING
Online websites are composed of: Users
To participate fully in an online social network, users must register with a site, possibly under a pseudonym.
Links The social network is composed of user accounts and
links between users. User links in social networks can serve the purpose of both hyperlinks and bookmarks in the Web
Users form links for one of several reasons; real world or online acquaintances, business contacts, shared interests or content sharing
Groups Most sites enable users to create and join special
interest groups. Users can post messages to groups and upload shared content to the group
7
CLASSIFICATION OF MEMBERS IN A SOCIAL NETWORK
We can classify the members of a social network into three group: Singletons
The singletons are degree-zero nodes who have joined the service but have never made a connection with another user.
Giant Component The giant component represents the large group of
people who are connected to one another through paths in the social network.
Middle Region The middle region is the remainder. It consists of
various isolated communities, small groups who interact with one another but not with the network at large.
8
SOCIAL NETWORK USERS
There are three types of users: Passive users
Join the network out of curiosity or at the insistence of a friend, but never engage in any significant activity.
Inviters Are interested in migrating an offline community into
an online social network, and actively recruit their friends to participate.
Linkers are full participants in the growth of the online social
network, and actively connect themselves to other members.
9
SOCIAL NETWORKING ACTIVITIES
10
VIDEO
11
SOCIAL NETWORKING PROPERTIES
Networks are defined by their actors and connections among them. Individual actors may have many or few ties. Individuals may be "sources" of ties, "sinks" (actors that receive ties, but don't send them), or both. Connections:
Size, density and degree Reachability Reciprocity and transitivity
12
CONTINUED…
Distance Walks
Simple Graphs Direct Graphs
13
PRIVACY IMPLICATIONS
The relation between privacy and a person’s social network is multi-faceted.
In certain occasions we want information about ourselves to be known only by a small circle of close friends, and not by strangers. e.g. the relationship status.
In other instances, we are willing to reveal personal information to anonymous strangers, but not to those who know us better. e.g. email id made for flirting.
14
CONTINUED…
Stalking Re-identification
Demographics re-identification
Face re-identification Building a Digital profile Fragile Privacy
Protection Fake Email Address Manipulating Users Advanced Search Features
15
NUMERICAL MODELING
A community is modeled as follows: Subjects:
Persons or actors, can be connected to each other only via links with the same objects
Objects: Concepts, represent interests.
No direct links between subjects. A subject can only be connected to another
subject in the following way via an object and two or more links: “Subject1 – Link1 – Object – Link2 – Subject2”.
16
CONTINUED… The following two factors are crucial in
influencing the connection strength/value of a link between subjects :
Capacity of subjects It reflects:
The number of things a person/agent is involved with. The number of activities a person/agent participates in, etc.
Identified by: The number of objects, the subject is connected to.
The more objects are linked to/embraced by a subject, the weaker connections of this subject are to other subjects via these objects. This is calculated as:
capacity(subject) = links _ connected(subject),
Where: links _ connected(subject) = {e | e = (subject,object)ÎE,objectÎC}.
17
CONTINUED…
Popularity of objects: Informally, it reflects the number of persons/agents
which are associated via any kind of link with the object.
Growing popularity of objects (or how many subjects are linked to these objects) weakens the connection strength between subjects linked via these objects.
This is calculated as:
popularity(object) = links _ connected(object) ,
Where: links _ connected(object) = {e | e = (subject,object)ÎE, subjectÎ A}
18
INTERESTING IMAGE SHOWING IMPACT OF SOCIAL NETWORKING
19
REFERENCES Alan Mislove, Krishna P. Gummadi, Massimiliano Marcon,
Peter Druschel, Bobby Bhattacharjee: Measurement and Analysis of Online Social Networks
Ravi Kumar, Jasmine Novak, Andrew Tomkins: Structure
and Evolution of Online Social Networks
Anna V. Zhdanova, Livia Predoiu, Tassilo Pellegrini, Dieter Fensel: A Social Networking Model of a Web Community
Ralph Gross, Alessandro Acquisti: Information Revelation
and Privacy in Online Social Networks (The Facebook case)http://www.heinz.cmu.edu/~acquisti/papers/privacy-facebook-gross-acquisti.pdf
Thank You!