Aleš Žiberna is a Slovene

statistician A statistician is a person who works with Theory, theoretical or applied statistics. The profession exists in both the private sector, private and public sectors. It is common to combine statistical knowledge with expertise in other subjects, a ...

, whose specialty is

network analysis Network analysis can refer to: * Network theory, the analysis of relations through mathematical graphs ** Social network analysis, network theory applied to social relations * Network analysis (electrical circuits) See also *Network planning and d ...

. His specific research interests include

blockmodeling Blockmodeling is a set or a coherent Conceptual framework, framework, that is used for analyzing social structure and also for setting procedure(s) for partitioning (clustering) social network's units (Node (computer science), nodes, vertices, soc ...

multivariate analysis Multivariate statistics is a subdivision of statistics encompassing the simultaneous observation and analysis of more than one outcome variable, i.e., '' multivariate random variables''. Multivariate statistics concerns understanding the differ ...

and

computer intensive method A computer is a machine that can be programmed to automatically carry out sequences of arithmetic or logical operations (''computation''). Modern digital electronic computers can perform generic sets of operations known as ''programs'', whi ...

s (e.g.,

computer simulation Computer simulation is the running of a mathematical model on a computer, the model being designed to represent the behaviour of, or the outcome of, a real-world or physical system. The reliability of some mathematical models can be determin ...

s, resampling methods). Currently, he is employed at the Faculty of Social Sciences of the

University of Ljubljana The University of Ljubljana (, , ), abbreviated UL, is the oldest and largest university in Slovenia. It has approximately 38,000 enrolled students. The university has 23 faculties and three art academies with approximately 4,000 teaching and re ...

, specifically at the Chair of Social Informatics and Methodology, and Centre for Methodology and Informatics.

Work

In 2007, he proposed a solution to the generalized valued blockmodeling by introducing

homogeneity blockmodeling In mathematics applied to analysis of social structures, homogeneity blockmodeling is an approach in blockmodeling, which is best suited for a preliminary or main approach to valued networks, when a prior knowledge about these networks is not ava ...

with the basic idea "that the inconsistency of an empirical block with its ideal block can be measured by within block variability of appropriate values". The newly-formed ideal blocks, which are appropriate for blockmodeling of valued networks, are then presented together with the definitions of their block inconsistencies. He also (in 2007/08) developed an

implicit blockmodeling Implicit blockmodeling is an approach in blockmodeling, similar to a valued and homogeneity blockmodeling, where initially an additional normalization is used and then while specifying the parameter of the relevant link is replaced by the block m ...

approach, based on previous work of Batagelj and Ferligoj (2000). In 2014, he proposed a new approach to the

blockmodeling linked networks Blockmodeling linked networks is an approach in blockmodeling in analysing the linked networks. Such approach is based on the generalized multilevel blockmodeling approach. The main objective of this approach is to achieve clustering of the nod ...

Selected bibliography

* ŽIBERNA, Aleš. Generalized blockmodeling of valued networks. Social Networks. rint ed. Jan. 2007, vol. 29, no. 1, str. 105-126. ISSN 0378-8733. * ŽIBERNA, Aleš. Blockmodeling of multilevel networks. Social Networks. rint ed. Oct. 2014, vol. 39, str. 46-61, ilustr. ISSN 0378-8733. DOI: 10.1016/j.socnet.2014.04.002. OBISS.SI-ID 32697949* ŽIBERNA, Aleš. Generalized blockmodeling of sparse networks. Metodološki zvezki. iskana izd. 2013, vol. 10, no. 2, str. 99-119, graf. prikazi. ISSN 1854-0023. http://www.stat-d.si/mz/mz10.1/Ziberna2013.pdf. OBISS.SI-ID 32428893* MATJAŠIČ, Miha, CUGMAS, Marjan, ŽIBERNA, Aleš. Blockmodeling : an R package for generalized blockmodeling. Metodološki zvezki. iskana izd. 2020, vol. 17, no. 2, str. 49-66, ilustr. ISSN 1854-0023. OBISS.SI-ID 53164547

Work

Selected bibliography

References

See also