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Gaining insight in social networks with biclustering and triclustering
Lecture Notes in Business Information Processing. 2012. Vol. 128 LNBIP. P. 162–171.
We combine bi- and triclustering to analyse data collected from the Russian online social network Vkontakte. Using biclustering we extract groups of users with similar interests and find communities of users which belong to similar groups. With triclustering we reveal users' interests as tags and use them to describe Vkontakte groups. After this social tagging process we can recommend to a particular user relevant groups to join or new friends from interesting groups which have a similar taste. We present some preliminary results and explain how we are going to apply these methods on massive data repositories.
Piontkovski D., / Series arXiv "math". 2026.
A noncommutative projective variety is defined, following Artin and Zhang, by a graded coherent algebra 𝐴. The category of coherent sheaves is then the quotient qgr(𝐴) of the category of finitely presented graded modules by the subcategory of torsion modules. We consider the categorical and polynomial entropies of the Serre twist, that is, of the ...
Added: June 23, 2026
Piontkovski D., / Series arXiv "math". 2025.
If a symmetric multilinear algebra is weakly nil, then it is Engel. This result may be regarded as an infinite-dimensional analogue of the well-known Jacobian theorem, which states that if a polynomial mapping has a polynomial inverse, then its Jacobian matrix is invertible. This refines a theorem of Gerstenhaber and partially answers a question posed ...
Added: June 23, 2026
Shipilov F., Barnyakov A., Ivanov A. et al., / Series Physics "arxiv.org". 2026.
A fast simulation of the detector response is a vital task in high-energy physics (HEP). Traditional Monte-Carlo methods form the backbone of modern particle physics simulation software but are computationally expensive. We present a machine-learning-based approach to fast simulation of the Focusing Aerogel Ring Imaging Cherenkov (FARICH) detector response. Given a particle track and momentum, ...
Added: May 19, 2026
Derkacheva A., Sakirkina M., Kraev G. et al., /. 2026.
Comprehensive data on natural hazards and their consequences are crucial for effective for risk assessment, adaptation planning, and emergency response. However, many countries face challenges with fragmented, inconsistent, and inaccessible data, particularly regarding local-scale events. To address this data gap in Russia, we developed an end-to-end processing pipeline that scrapes news from various online sources, ...
Added: April 28, 2026
Pilé I., Deng Y., Shchur L., / Series arXiv "math". 2026. No. 2604.10254.
We investigate the spatial overlap of successive spin configurations in Markov chain Monte Carlo simulations using the local Metropolis algorithm and the Svendsen-Wang and Wolff cluster algorithms. We examine the dynamics of these algorithms for two models in different universality classes: the Ising model and the Potts model with three components. The overlap of two ...
Added: April 20, 2026
Gabdullin N., Androsov I., / Series Computer Science "arxiv.org". 2026.
Label prediction in neural networks (NNs) has O(n) complexity proportional to the number of classes. This holds true for classification using fully connected layers and cosine similarity with some set of class prototypes. In this paper we show that if NN latent space (LS) geometry is known and possesses specific properties, label prediction complexity can ...
Added: April 2, 2026
Ignatov D. I., , in: 11th International Conference, AIST 2023, Yerevan, Armenia, September 28–30, 2023, Revised Selected Papers. Analysis of Images, Social Networks and Texts. Lecture Notes in Computer Science (LNCS, volume 14486).: Cham: Springer, 2024. P. 349 – 361.
This paper dates back to the asymptotic solutions of Rota’s problem on the size of maximum antichain in the set partition lattice by Canfield and Harper and others. The knowledge of asymptotic coefficients could pave the way to the asymptotic solutions of such problems as (maximal) antichain counting in partition lattices. In addition to our ...
Added: January 23, 2026
Sorokin K., Beketov M., Онучин А. et al., / arxiv.org. Серия cs.SI "Social and Information Networks ". 2025.
Community detection in complex networks is a fundamental problem, open to new approaches in various scientific settings. We introduce a novel community detection method, based on Ricci flow on graphs. Our technique iteratively updates edge weights (their metric lengths) according to their (combinatorial) Foster version of Ricci curvature computed from effective resistance distance between the ...
Added: January 15, 2026
Petrovanov I., Sergeev A., / Series Computer Science "arxiv.org". 2025. No. 2512.18332.
Transport coding reduces message delay in packet-switched networks by introducing controlled redundancy at the transport layer: original packets are encoded into coded packets, and the message is reconstructed after the first successful deliveries, effectively shifting latency from the maximum packet delay to the -th order statistic. We present a concise, reproducible discrete-event implementation of transport coding in OMNeT++, including ...
Added: December 24, 2025
Hessian-based lightweight neural network for brain vessel segmentation on a minimal training dataset
Меньшиков И. А., Бернадотт А. К., Elvimov N. S., / Series arXie "Statistical mechanics". 2025.
Accurate segmentation of blood vessels in brain magnetic resonance angiography (MRA) is essential for successful surgical procedures, such as aneurysm repair or bypass surgery. Currently, annotation is primarily performed through manual segmentation or classical methods, such as the Frangi filter, which often lack sufficient accuracy. Neural networks have emerged as powerful tools for medical image ...
Added: December 1, 2025
Rubchinskiy A., Chubarova D., / Series WP7 "Математические методы анализа решений в экономике, бизнесе и политике". 2025. No. WP7/2025/01.
The article examines one of the most famous examples of socio-economic systems, characterized by significant uncertainty – the S&P-500 stock market, where shares of 500 largest US companies are traded. No assumptions are made about the probabilistic characteristics of the stock market. A flexible algorithm for daily trading has been developed, based on both known fixed data ...
Added: November 9, 2025
Pavlenko B., JMIR INFODEMIOLOGY 2025 Vol. 5 Article e58302
Background: The outbreak of SARS-CoV-2 in 2019 was accompanied by a rise in the popularity of conspiracy theories. These theories often undermined vaccination efforts. There is evidence that the spread of misinformation about COVID-19 is associated with online social media use. Online social media enables network effects that influence the dissemination of information. It is important ...
Added: June 5, 2025
Ignatov D. I., Khvorykh G., Khrunin A. et al., , in: Recent Trends in Analysis of Images, Social Networks and Texts. 9th International Conference, AIST 2020, Skolkovo, Moscow, Russia, October 15–16, 2020 Revised Supplementary ProceedingsVol. 12602.: Springer, 2021. P. 185–204.
© 2021, Springer Nature Switzerland AG.Missing genotypes can affect the efficacy of machine learning approaches to identify the risk genetic variants of common diseases and traits. The problem occurs when genotypic data are collected from different experiments with different DNA microarrays, each being characterised by its pattern of uncalled (missing) genotypes. This can prevent the ...
Added: November 1, 2022
Egurnov D., Ignatov D. I., Automation and Remote Control 2022 Vol. 83 No. 6 P. 894–902
Abstract: The paper deals with the problem of triclustering in multivalued triadic contexts in termsof one multidimensional extension of formal concept analysis; triclustering can be viewed as asearch for dense subtensors in three-dimensional tensors over the field of real numbers. Twomethods are proposed for solving this problem, namely, NOAC—a version of the OACtriclustering method for ...
Added: November 1, 2022
Вера Николаевна Минина, Василькова В. В., Социальное пространство 2019 № 5(22) С. 1–15
The article discusses the actual sociological problem of interrelation of ontological and epistemological bases in the study of social space. The authors draw attention to the fragmentation of Internet space research and aim to analyze the transformation of scientific approaches to the problem of social space in the process of nderstanding the new ontology of ...
Added: October 7, 2022
Колпинец Е. В., Социодиггер 2021 Т. 2 № 7 (12) С. 16–21
В разговоре об алгоритмах, их влиянии на коллективное и индивидуальное восприятие соцсетей, на мой взгляд, важен конфликт очищенных от контекста больших данных, на которые так любят ссылаться маркетологи и аналитики, и пользовательских практик, пронизанных аффектами и догадками. Даже имея большие
данные, например, подробную статистику пользователей с учетом возраста,
гендера, территориальной принадлежности пользователей, исследователи и маркетологи часто не ...
Added: April 19, 2022
Kolosovskaya E. V., Gribach S. V., SIBUL V., , in: TRAINING, LANGUAGE AND CULTUREVol. 3. Issue 4.: Peoples' Friendship University of Russia (RUDN University), 2019. P. 56–64.
The article reveals the issues of expanded understanding of self-presentation viewed as an integral component of any communicative act, as the socio-cultural behaviour, and also as a means of controlling the impression a person makes on others in the process of interaction. As communication through social networks is becoming an increasingly common element of modern ...
Added: June 6, 2021
Koltsova Olessia Y., Mararitsa Larisa V., Terpilovskii Maxim A. et al., Computers in Human Behavior 2021 No. 122 Article 106856
Social tie maintenance has always had cognitive and emotional costs and has always been leading to uneven distribution of communication volume among egos' alters. This distribution, known as a social signature, is assumed to be relatively stable for each individual. Availability of digital traces of human communication allows testing
whether this assumption is true and whether it holds in specific ...
Added: May 11, 2021
Kowal M., Sorokowski P., Sorokowski A. et al., Frontiers in Psychology 2020 Vol. 11 Article 711
*Реализация соц. сети Facebook запрещена на территории России по основаниям осуществления экстремистской деятельности.
Reasons for Facebook Usage: Data From 46 Countries ...
Added: October 30, 2020
CEUR-WS.org, 2020.
The CLA conference is an international forum for researchers, practitioners and students dedicated to the practice of Formal Concept Analysis (FCA) and areas closely related to it, including data analysis and mining, information retrieval, knowledge management, knowledge engineering, logic, algebra and lattice theory.
The 15th of CLA, CLA 2020, was going to be held in Tallinn, Estonia ...
Added: October 30, 2020
Sinyavskaya Y., Porshnev A., , in: Networks in the Global World V: Proceedings of NetGloW 2020. Lecture Notes in Networks and SystemsVol. 181.: Springer, 2021. P. 196–208.
Rich data from social network sites (SNS) attracts the attention of psychologists and sociologists interested in interpersonal dynamics, friendship networks, and social capital. The presented study explores the effect of network structural features and psychological characteristics of SNS users on changes in their friendship networks. The data from the representative and diverse sample of 375 ...
Added: September 25, 2020
Koltsova O., Porshnev A., Sinyavskaya Y., , in: The Palgrave Handbook of Digital Russia Studies.: Palgrave Macmillan, 2021. P. 335–352.
Rapidly proliferating social media not only serve as a new channel of human communication but also open up research opportunities to ask a wider set of questions about political, sociological and psychological factors that influence interpersonal and group online communication, development and maintenance of personal networks, and the growth or decline of social capital. In ...
Added: September 25, 2020
Moroz A., Pashakhin S., Koltsov S., , in: Networks in the Global World V: Proceedings of NetGloW 2020. Lecture Notes in Networks and SystemsVol. 181.: Springer, 2021. P. 180–195.
Online social networks have become an essential communi- cation channel for the broad and rapid sharing of information. Currently, the mechanics of such information-sharing is captured by the notion of cascades, which are tree-like networks comprised of (re)sharing actions. However, it is still unclear what factors drive cascade growth. Moreover, there is a lack of ...
Added: September 22, 2020
Springer, 2021.
Added: September 22, 2020