
SI 708 syllabus 


Missed the class? You can still play with some online demos here.
For fall 2007 click here.
Check out a subset of student projects for winter 2007:
This course will cover topics in network analysis, from social networks to applications in information networks such as the internet. We will introduce basic concepts in network theory, discuss metrics and models, use software analysis tools to experiment with a wide variety of realworld network data, and study applications to areas such as information retrieval. For their final project, the students will apply the concepts learned in class to networks of interest to them.
Compared to the masters level course (previously SI 614, now SI 508, not offered in 06/07), SI 708 will have a greater emphasis on mathematical modeling and algorithms, as well as serve as a broader survey of current research in network science. In addition to covering most of the topics in SI 614 it will cover network evolution, p* models, biological networks, agent based modeling, general graph search algorithms, flow, or epidemic modeling. It will have less of an emphasis on use of software tools.



 There are two primary readings:
The structure and function of complex networks, M. E. J. Newman, SIAM Review 45, 167256 (2003). (here refered to as MEJN)
Exploratory Social Network Analysis with Pajek by Wouter de Nooy, Andrej Mrvar and Vladimir Batagelj (here referred to as Pajek)




Jan. 4 
course intro 

Jan. 9 
basic network metrics,
intro to Pajek 
Pajek Ch1: Looking for social structure 
Jan. 11 
network visualization
data sampling methods
clustering 
Pajek CH2: Attributes and Relations
Linton Freeman, 'Visualizing Social Networks', JOSS
optional Rowland Atkinson and John Flint, 'Accessing Hidden and HardtoReach Populations: Snowball Research Strategies'

Jan. 16 
Pajek lab 

Jan. 18
PS 1 due 
Milgram's small world experiment
WattsStrogatz small world model

Watts & Strogatz, 'Collective Dynamics of Small World Networks', Nature, 1998
MEJNSF 6: The Small World Model
Travers and Milgram, 'An experimental study of the small world problem'

Jan. 23 
Zipf's Law & fat tails, plotting & fitting distributions 
L. Adamic, Zipf, Powerlaws, and Pareto  a ranking tutorial
Power laws, Pareto distributions and Zipf's law, M. E. J. Newman, Contemporary Physics 46, 323351 (2005).

Jan. 25
PS 2 due 
random graphs,
networks in NetLogo
preferential attachment

MEJN IV: Random Graphs
Barabasi and Albert, 'Emergence of scaling in random networks'
MEJN VII: Models of network growth
Optional: Topology of evolving networks: local events and universality, Reka Albert, AlbertLaszlo Barabasi, Phys. Rev. Lett. 85, 52345237 (2000) (used in Pajek)
Optional: Winners don't take all: Characterizing the
competition for links on the web David M. Pennock, Gary W. Flake, Steve Lawrence, Eric J. Glover, and C. Lee Giles, PNAS, April 16, 2002, vol. 99, no. 8

Jan. 30 
BFS & DFS
(we'll be using slides by Prof. Plaisted at UNC: and )

Cormen, 'Algorithms': Elementary graph algorithms
optional: Ch 3 of Kleinberg and Tardos, 'Algorithm Design' 
Feb. 1
PS 3 due 
centrality, betweenness

Pajek Ch. 6: Center and Periphery
optional: Wayne E. Baker and Robert R. Faulkner, The Social Organization of Conspiracy: Illegal Networks in the Heavy Electrical Equipment Industry, American Sociological Review, Vol. 58, No. 6 (Dec, 1993)
optional: Noah E. Friedkin, 'Structural Bases of Interpersonal Influence in Groups: A Longitudinal Case Study, American Sociological Review, Vol. 58, No. 6 (Dec, 1993)
optional M. E. J. Newman, Who is the Best Connected Scientist? A Study of Scientific Coauthorship Networks.

Feb. 6
project proposal due 
strength of weak ties 
Mark Granovetter, The Strength of Weak Ties, The American Journal of Sociology, Vol. 78, No. 6 (May, 1973), 13601380.

Feb. 8
PS 4 due 
prestige

Pajek Ch9: prestige
optional Wasserman & Faust Ch5: Centrality and prestige

Feb. 13 
structural similarity
homophily
exploratory analysis of online communities

S. Feld. Social structural determinants of similarity among associates. American Sociological Review, 47, 1982.
optional: L. A. Adamic and E. Adar. Friends and neighbors on the web. Social Networks, 25(3):211{230, 2003.
optional: L. A. Adamic, O. Buyukkokten, and E. Adar. A social network caught in the web. First Monday, 8(6), June 2003.
optional: L. A. Adamic and N. Glance. The political blogosphere and the 2004 US election: Divided they blog. In Proceedings of LinkKDD2005, 2005.

Feb. 15 
guest lecture by Mark Newman: community structure 
Modularity and community structure in Networks, M. E. J. Newman, PNAS  June 6, 2006  vol. 103  no. 23  85778582

Feb. 20
PS 5 due 
exploratory network analysis with GUESS 
Eytan Adar, GUESS: A Language and Interface for Graph Exploration, CHI 2006
GUESS documentation 
Feb. 22
take home midterm due 
weighted networks
minimum spanning trees, flow 
Barrat et al.: The architecture of complex weighted networks
Kleinberg and Tardos, 'Network Flow' in 'Algorithm Design' 

 break  

Mar. 6 
biological networks
motifs

E. Alm and A. P. Arkin. Biological networks. Curr Opin
Struct Biol, 13(2):193202, April 2003.
R. Milo, S. Itzkovitz, N. Kashtan, R. Levitt, S. ShenOrr, I. Ayzenshtat, M. Sheffer, and U. Alon. Superfamilies of evolved and designed networks. Science, 303(5663):15381542, March 2004.
R. Milo, S. ShenOrr, S. Itzkovitz, N. Kashtan, D. Chklovskii, and U. Alon. Network Motifs: Simple Building Blocks of Complex Networks. Science, 298(5594):824827, 2002.
optional E. Ravasz, A. L. Somera, D. A. Mongru, Z. N. Oltvai, and A. L. Barabasi. Hierarchical organization of modularity in metabolic networks. Science, 297(5586):1551{1555, August 2002.

Mar. 8
PS 6 due 
robustness

Error and attack tolerance of complex networks
Reka Albert , Hawoong Jeong & AlbertLaszlo Barabasi
Nature 406, 378  382 (27 July 2000)
optional: Modeling cascading failures in the North American power grid R. Kinney, P. Crucitti, R. Albert, and V. Latora
Eur. Phys. J. B 46, 101107 (2005)

Mar. 13 
mo' community structure

Pajek Ch3: cohesive subgroups
Pajek Ch5: affiliations
Pajek Ch7: brokers and bridges
Guimera et al. Team Assembly Mechanisms Determine Collaboration Network Structure and Team Performance, Science 29 April 2005: Vol. 308. no. 5722, pp. 697  702

Mar. 15
project status report due

search 
J. M. Kleinberg. Navigation in a small world. Nature, 406:845, 2000.
D. J. Watts, P. S. Dodds, and M. E. J. Newman. Identity and search in social networks. Science, 296:13021305, 2002.
MEJN VIII.C Search in networks
optional: J. Kleinberg. Smallworld phenomena and the dynamics of information.Advances in Neural Information Processing Systems (NIPS), 14, 2001.
optional: L. A. Adamic and E. Adar. How to search a social network. Social Networks, 27(3):187203, 2005.
Adamic et al. 'Search in power law networks', Phys. Rev. E 64, 046135 (2001)

Mar. 20 
epidemics in networks 
R. PastorSatorras and A. Vespignani, Epidemics and immunization in
scalefree networks
optional: M. E. J. Newman, Spread of epidemic disease on networks
optional: Vittoria Colizza, Alain Barrat, Marc Barthélemy, and Alessandro Vespignani. The role of the airline transportation network in the prediction and predictability of global epidemics. PNAS  February 14, 2006  vol. 103  no. 7  20152020 
Mar. 22
PS 7 due 
information diffusion 
Davis, Gerald F., Yoo, Mina, Baker, Wayne E.
The Small World of the American Corporate Elite, 19822001 Strategic Organization 2003 1: 301326
Holme & Newman: Coevolution of networks and opinion
optional: Christopher Marquis and Gerald F. Davis, “Golfing alone? Elite cohesion and community social capital, 19861998.” 
Mar. 26 
no class 
please attend a networks seminar instead

Mar. 28
PS 8 due 
Erik Johnston guest lecture 
optional: N. Nan, E. W. Johnston, and J. S. Olson, 'Unintended consequences in centralremote office arrangement: a study coupling laboratory experiment with multiagent simulation'.

Apr. 3 
networks over time 
G. Kossinets and D. J. Watts. Empirical analysis of an evolv
ing social network. Science, 311(5757):8890, January 2006.
J. Leskovec, J. Kleinberg, and C. Faloutsos. Graphs over time: densification laws, shrinking diameters and possible explanations. In KDD '05, New York, NY, USA, 2005. 
Apr. 5
PS 9 due 
ranking algorithms and information retrieval 
Broder et al, Graph Structure in the Web, 9th WWW conference, Amsterdam, May 2000.
L. Page, S. Brin, R. Motwani, and T. Winograd. The pagerank citation ranking: Bringing order to the web. Technical report, Stanford Digital Library Technologies Project, 1998.
G. Erkan and D. R. Radev. Lexrank: Graphbased lexical centrality as salience in text summarization. Journal of Artificial Intelligence .
J. M. Kleinberg. Authoritative sources in a hyperlinked environment. Journal of the ACM, 46(5):604632, 1999. 
Apr. 10 
online communities 
David LibenNowell, Jasmine Novak, Ravi Kumar, Prabhakar Raghavan and Andrew Tomkins. Geographic routing in social networks, PNAS  August 16, 2005  vol. 102  no. 33  1162311628 
Apr. 12 
project presentations 

Apr. 17 
project presentations 

Aprl. 24 
final report due 




