000079031 001__ 79031 000079031 005__ 20230914083227.0 000079031 0247_ $$2doi$$a10.3389/fphy.2019.00058 000079031 0248_ $$2sideral$$a111567 000079031 037__ $$aART-2019-111567 000079031 041__ $$aeng 000079031 100__ $$0(orcid)0000-0002-2789-9250$$aMaciel Cardoso, F.$$uUniversidad de Zaragoza 000079031 245__ $$aTopical Alignment in Online Social Systems 000079031 260__ $$c2019 000079031 5060_ $$aAccess copy available to the general public$$fUnrestricted 000079031 5203_ $$aUnderstanding the dynamics of social interactions is crucial to comprehend human behavior. The emergence of online social media has enabled access to data regarding people relationships at a large scale. Twitter, specifically, is an information oriented network, with users sharing and consuming information. In this work, we study whether users tend to be in contact with people interested in similar topics, i.e., if they are topically aligned. To do so, we propose an approach based on the use of hashtags to extract information topics from Twitter messages and model users' interests. Our results show that, on average, users are connected with other users similar to them. Furthermore, we show that topical alignment provides interesting information that can eventually allow inferring users' connectivity. Our work, besides providing a way to assess the topical similarity of users, quantifies topical alignment among individuals, contributing to a better understanding of how complex social systems are structured. 000079031 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/MDM-2017-0711$$9info:eu-repo/grantAgreement/ES/MINECO/FIS2017-87519-P$$9info:eu-repo/grantAgreement/EC/FP7/317532/EU/Foundational Research on MULTIlevel comPLEX networks and systems/MULTIPLEX 000079031 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/ 000079031 590__ $$a2.638$$b2019 000079031 592__ $$a0.597$$b2019 000079031 591__ $$aPHYSICS, MULTIDISCIPLINARY$$b30 / 84 = 0.357$$c2019$$dQ2$$eT2 000079031 593__ $$aMathematical Physics$$c2019$$dQ2 000079031 593__ $$aMaterials Science (miscellaneous)$$c2019$$dQ2 000079031 593__ $$aPhysics and Astronomy (miscellaneous)$$c2019$$dQ2 000079031 593__ $$aPhysical and Theoretical Chemistry$$c2019$$dQ2 000079031 593__ $$aBiophysics$$c2019$$dQ3 000079031 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000079031 700__ $$0(orcid)0000-0001-6202-3302$$aMeloni, S. 000079031 700__ $$aSantanche, A. 000079031 700__ $$0(orcid)0000-0002-0895-1893$$aMoreno, Y.$$uUniversidad de Zaragoza 000079031 7102_ $$12004$$2405$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Teórica 000079031 773__ $$g7 (2019), 58 [12 pp]$$pFront. phys.$$tFRONTIERS IN PHYSICS$$x2296-424X 000079031 8564_ $$s443557$$uhttps://zaguan.unizar.es/record/79031/files/texto_completo.pdf$$yVersión publicada 000079031 8564_ $$s11304$$uhttps://zaguan.unizar.es/record/79031/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000079031 909CO $$ooai:zaguan.unizar.es:79031$$particulos$$pdriver 000079031 951__ $$a2023-09-13-10:43:24 000079031 980__ $$aARTICLE