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Schuhart, Russell G. "Hacking social networks examining the viability of using computer network attack against social networks". Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion.exe/07Mar%5FSchuhart.pdf.
Pełny tekst źródłaThesis Advisor(s): David Tucker. "March 2007." Includes bibliographical references (p. 55-56). Also available in print.
Tarasenko, O. M. "Social networks". Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/40502.
Pełny tekst źródłaFarry, Michael P. (Michael Patrick). "Sensor networks for social networks". Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36764.
Pełny tekst źródłaIncludes bibliographical references (p. 51-55).
This thesis outlines the development of software that makes use of Bayesian belief networks and signal processing techniques to make meaningful inferences about real-world phenomena using data obtained from sensor networks. The effectiveness of the software is validated by applying it to the problem of detecting face-to-face social interactions between groups of people, given data readings from sensors that record light, temperature, acceleration, sound, and proximity. This application represents a novel method for social network construction which is potentially more accurate and less intrusive than traditional methods, but also more meaningful than newer methods that analyze digitally mediated communication.
by Michael P. Farry.
M.Eng.
Araújo, Ricardo Matsumura de. "Memetic networks : problem-solving with social network models". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/25515.
Pełny tekst źródłaSocial systems are increasingly relevant to computer science in general and artificial intelligence in particular. Such interest was first sparkled by agent-based systems where the social interaction of such agents can be relevant to the outcome produced. A more recent trend comes from the general area of Social Information Processing, Social Computing and other crowdsourced systems, which are characterized by computing systems composed of people and strong social interactions between them. The set of all social interactions and actors compose a social network, which may have strong influence on how effective the system can be. In this thesis, we explore the role of network structure in social systems aiming at solving problems, focusing on numerical and combinatorial optimization. We frame problem solving as a search for valid solutions in a state space and propose a model - the Memetic Network - that is able to perform search by using the exchange of information, named memes, between actors interacting in a social network. Such model is applied to a variety of scenarios and we show that the presence of a social network greatly improves the system capacity to find good solutions. In addition, we relate specific properties of many well-known networks to the behavior displayed by the proposed algorithms, resulting in a set of general rules that may improve the performance of such social systems. Finally, we show that the proposed algorithms can be competitive with traditional heuristic search algorithms in a number of scenarios.
Trevillion, Steven. "Social work and social networks". Thesis, Brunel University, 1998. http://bura.brunel.ac.uk/handle/2438/5522.
Pełny tekst źródłaBecirovic, Ema. "On Social Choice in Social Networks". Thesis, Linköpings universitet, Kommunikationssystem, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-138578.
Pełny tekst źródłaSocial choice becomes a part of everyday life when groups of people are faced with decisions to make. We often adjust our personal beliefs with the respect to our friends. We are inherently dependent on the happiness of those near us. In this thesis, we investigate an existing empathy model that is used to select a winner in a set of alternatives by using scoring winner selection methods. We show that a slight modification of the model is enough to be able to use superior winner selection methods that are based on pairwise comparisons of alternatives. We show that there is essentially no reason to use scoring winner selection methods in the models proposed as a more desirable result is achieved by using superior winner selection methods.
Vallapu, Sai Krishna. "Towards Network False Identity Detection in Online Social Networks". Thesis, Southern Illinois University at Edwardsville, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10246101.
Pełny tekst źródłaIn this research, we focus on identifying false identities in social networks. We performed a detailed study on different string matching techniques to identify user profiles with real or fake identity. In this thesis, we focus on a specific case study on sex offenders. Sex offenders are not supposed to be online on social networking sites in few states. To identify the existence of offenders in social networks, we ran experiments to compare datasets downloaded from Facebook and offender registries. To identify the most suitable string matching technique to solve this particular problem, we performed experiments on various methods and utilized the most appropriate technique, the Jaro-Winkler algorithm. The major contribution of our research is a weight based scoring function that is capable of identifying user records with full or partial data revealed in social networks. Based on our data samples created using metadata information of Facebook, we were able to identify the sex offender profiles with real identity and seventy percent of the sex offenders with partial information.
You, Bo. "Hub-Network for Distance Computation in Large Social Networks". Kent State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=kent1412601464.
Pełny tekst źródłaBodriagov, Oleksandr. "Social Networks and Privacy". Licentiate thesis, KTH, Teoretisk datalogi, TCS, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-166818.
Pełny tekst źródłaCentraliserade sociala online nätverk utgör ett hot mot användarnas integritet. Detta eftersom leverantörer av sociala nätverkstjänster har obegränsad tillgång till användarnas information. Decentraliserade sociala nätverk löser integritetsproblemet genom att eliminera leverantörer och ge användarna kontroll över deras data. Innebörden av detta är att användarna själva får bestämma vem som får tillgång till deras data. Även om det finns flera förslag och vissa framsteg i utvecklingen avseende integritetsbevarande decentraliserade sociala nätverk, har målet om säkra, effektiva, och tillgängliga sociala nätverk i en decentraliserad miljö inte uppnåtts fullt ut. Denna avhandling bidrar till forskning inom säkerhet avseende sociala nätverk med fokus på decentraliserade sociala nätverk. Avhandlingen inriktas på krypteringsbaserad åtkomstkontroll och hantering av kryptografiska nycklar (som krävs för denna åtkomstkontroll) med hjälp av användarkonton med lösenordsbaserad inloggning i decentraliserade sociala nätverk. Först undersöker denna avhandling krav på kryptering för decentraliserade sociala nätverk och föreslår utvärderingskriterier. Dessa utvärderingskriterier används sedan för bedömning av befintliga krypteringsbaserade system för åtkomstkontroll. Vår utredning visar att samtliga garanterar sekretess av själva innehållet. Integritet av information om innehållet eller åtkomstprinciper är dock inte skyddat alls, alternativt skyddade på bekostnad av systemets prestanda och flexibilitet. Vi lyfter fram potentialen i två klasser av integritetsbevarande system i DOSN sammanhang: broadcast-krypteringssystem med dolda tillgångsstrukturer och predikat krypteringssystem; vi föreslår användning av dessa system. Båda dessa klasser innehåller system som uppvisar önskvärda egenskaper och uppfyller kriterier på ett bättre sätt. För det andra analyserar avhandlingen predikat kryptering och anpassar denna till DOSN sammanhang, eftersom det är för dyrt att använda som det är. Vi föreslår en ”univariate polynomial construction” för åtkomstprinciper i predikat kryptering som drastiskt ökar systemets prestanda, men läcker någon del av åtkomstprincipen till användare med åtkomsträttigheter. Vi använder Bloom-filter för att minska dekrypteringstiden och indikera objekt som kan dekrypteras av en viss användare. Genom att göra ett experiment med nyhetsflödessammansättning visas att det anpassade systemet ger goda resultat och därmed användarupplevelse. För det tredje presenterar avhandlingen en lösning på problemet avseende hanteringen av kryptografiska nycklar för autentisering och kommunikation mellan användare i decentraliserade sociala online nätverk. Vi föreslår en lösenordsbaserad inloggningsprocedur för peer-to-peer (P2P) miljön, som gör att användaren som passerar autentisering får återvinna en uppsättning kryptografiska nycklar som krävs för applikationen. Förutom lösenordsinloggning presenterar vi också stödprotokoll för att ge relaterat funktionalitet, såsom inloggning med lagrade lösenord, lösenordsbyte, och återställning av bortglömda lösenord. Kombinationen av dessa protokoll tillåter simulera lösenordsinloggning i centraliserade system. Prestandautvärderingen visar att tiden som krävs för inloggning är inom acceptabla gränser.
QC 20150602
Ammar, Ammar (Ammar T. ). "Search using social networks". Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62635.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (p. 59-61).
In this thesis, we present an approach to the problem of personalized web search which makes use of the searcher's social network, in addition to the hyper-link based score used in most search engines. This combination of social and absolute search scores aims to improve the visibility of information that is relevant to the searcher, while maintaining any absolute measures of document importance . In our approach we adopt a flexible framework for combining information from different sources using Rank Aggregation techniques. Our search system, implemented using Java and Python, covers all the events and web pages present on MIT owned websites. We discuss the theory, design,and implementation of this system in details.
by Ammar Ammar.
M.Eng.
Hague, Thomas. "Social Networks and Innovation". Scholarship @ Claremont, 2016. http://scholarship.claremont.edu/cmc_theses/1328.
Pełny tekst źródłaHuang, Yongjian. "Supporting meaningful social networks". Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/69844/.
Pełny tekst źródłaShaikh, Sajid S. "COMPUTATION IN SOCIAL NETWORKS". Kent State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=kent1185560088.
Pełny tekst źródłaGamal, Doaa. "Social Networks Influence Analysis". UNF Digital Commons, 2017. http://digitalcommons.unf.edu/etd/723.
Pełny tekst źródłaFracassi, Cesare. "Social networks and finance". Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1872060441&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Pełny tekst źródłaBolletta, Ugo <1986>. "Social Influence in Networks". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7332/1/Bolletta_Ugo_Tesi.pdf.
Pełny tekst źródłaRancan, Michela. "Social Networks in Finance". Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3427391.
Pełny tekst źródłaLo scopo principale di questa tesi è quello di approfondire il ruolo dei network sociali in finanza. L'interesse per questa tematica nasce dal fatto che i network sociali influenzano opinioni, scelte e comportamenti degli agenti. Non solo, i mercati finanziari oggigiorno sono sempre più interdipendenti e gli agenti che vi operano fortemente interconnessi. Tuttavia nell'approcio tradizionale la competizione è sempre stata un'assunzione standard nei modelli di mercati finanziari. Pertanto, questo lavoro è stato ispirato dalla curiosità scientifica di studiare se l'interazione sociale possa essere un canale di scambio di informazioni anche in ambito finaziario, se le scelte finanziarie possano essere influenzate dai network e più in generale quali possano essere le implicazioni dei network sociali in finanza. Nel tentativo di dare una prima risposta a queste domande si è utilizzato un campione di fondi di investimento americani e i network dei manager che gestiscono tali fondi (definiti in base a informazioni bibliografiche). Più precisamente nel primo capitolo si è introdotto il tema dei social network, discutendo la recente letteratura che in finanza si è occupata di tale argomento e menzionando alcune difficoltà applicative. Nel secondo capitolo si è analizzato se le scelte di investimento dei manager dei fondi di investimento siano influenzati dai comportamenti di investimento di altri manager appartenenti allo stesso network sociale (ovvero manager che si sono laureati presso la stessa università). I risultati hanno evidenziato che un manager ha maggior probabilità di comprare/vendere una determinata azione in un determinato trimestre se i manager del suo stesso network hanno fatto la medesima scelta di investimento. Questo effetto è più marcato quando la definizione di network si riferisce sia all'università frequentata che all'anno di conseguimento della laurea. Questi risultati possono essere spiegati dal fatto che manager dello stesso network si siano scambiati informazioni, oppure dal fatto di aver ricevuto la stessa formazione accaddemica o aver vissuto nel medesimo contesto socio-economico. Infine, nel terzo capitolo, si è studiato l'effetto del network sociale sulle performance dei fondi di investimento. Lo studio delle proprietà dei network, mediante l'utilizzo della social network analysis, mostra che i network dei manager dei fondi di investimento, costruiti mediante le informazioni sulla formazione universitaria, hanno tutte le caratteristiche di un small world (secondo la definizione di Watts and Strogatz, 1998). In linea con questo risultato l'analisi empirica ha mostrato come le performance dei fondi sono significativamente più elevate quando i manager dei fondi hanno molte conessioni e una buona posizione nel network.
Burks, Stephen D. "Social Networks and Its Uses in Collaborative Strategies". Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5094.
Pełny tekst źródłaNguyen, Nguyet Minh. "SNbR : Social Networks-based Forwarding in Delay Tolerant Networks". Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42275.
Pełny tekst źródłaDeBusk, Kendra Portia Adrienne Howard. "Emotional intelligence, personality, social networks, and social perception". Thesis, University of Edinburgh, 2008. http://hdl.handle.net/1842/3452.
Pełny tekst źródłaJohnson, Cathleen A. "Social Capital and Conventions: A Social Networks Perspective". Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/27230.
Pełny tekst źródłaPh. D.
ATHANASIOU, THOMAS. "Multi-dimensional analysis of social multi-networks : Analysing a 5-layer social network case study". Thesis, Uppsala universitet, Institutionen för informatik och media, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-273908.
Pełny tekst źródłaBroccatelli, Chiara. "Going beyond secrecy : methodological advances for two-mode temporal criminal networks with Social Network Analysis". Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/going-beyond-secrecy-methodological-advances-for-twomode-temporal-criminal-networks-with-social-network-analysis(f0f91f79-7bc3-442c-a16b-e9cf44cc68c3).html.
Pełny tekst źródłaAnderson, Jonathan. "Privacy engineering for social networks". Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/244239.
Pełny tekst źródłaGaleotti, Andrea. "On social and economic networks". [Amsterdam] : Rotterdam : Thela Thesis ; Erasmus University [Host], 2005. http://hdl.handle.net/1765/1920.
Pełny tekst źródłaCano, Daniel Ramirez. "Opinion formation in social networks". Thesis, Imperial College London, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540688.
Pełny tekst źródłaKestner, John Anthony. "Social networks for lonely objects". Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62077.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (p. 115-119).
Visions of ubiquitous computing describe a network of devices that quietly supports human goals, but this may also add complexity to an already frustrating relationship between humans and their electronic objects. As we move from vision to reality, there is an opportunity to rethink how we interact with our objects and networks of objects, and close the communication gap between man and machine. 'This thesis defines social and super-mechanical affordances for products which may consist of many physical and digital objects. These new objects will not look like stripped-down contemporary computers, but augmented ordinary objects that are focused on input and output, exposed on Twitter. Apps in the cloud use Twitter to marshall the appropriate objects to execute human tasks. Using a social network as transport allows apps and their owners to manage a large network of computing objects with the same constructs that we use to manage many human relationships. From this direction, we take a step toward a consumer-amenable implementation of ubiquitous computing.
by John Anthony Kestner.
S.M.
Campbell, Arthur (Arthur Donald). "Social networks in industrial organization". Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/49714.
Pełny tekst źródłaIncludes bibliographical references (p. 141-145).
Chapter 1 studies the optimal strategies of a monopolist selling a good to consumers who engage in word of mouth communication. The monopolist uses the price it charges to influence both the proportion of the population that is willing to purchase the good and the pattern of communication that takes place within the social network. I find a number of results: (i) demand is more elastic in the presence of word of mouth; (ii) the monopolist reduces the price to induce additional word of mouth for regular goods, however for goods whose valuation is greater for well connected individuals the price may, in fact, be greater; (iii) the optimal pattern of diffusion involves introductory prices which vary up and down; and (iv) exclusive (high priced) products will optimally target advertising towards individuals with many friends whereas common (low priced) products will target individuals with fewer friends. Chapter 2 presents a model of friendship formation in a social network. During each period a new player enters the social network, this player searches for and forms friendships with the existing population and all individuals play a prisoner's dilemma game with each of their friends. The set of friendships a player forms reveals some information to a friend about how likely she is to subsequently cooperate. Cooperative types are able to separate themselves from uncooperative types by becoming friends with people who know one another.
(cont.) The threat of communication amongst people who know one another prevents an uncooperative type mimicking a cooperative type. Chapter 3 analyzes the effects of policies which support electricity generation from intermittent technologies (wind, solar). I find that intermittent generation is a substitute for baseload technologies but may be complementary or substitutable for peaking/intermediate technologies. I characterize the long run implications of this for carbon emissions.
by Arthur Campbell.
Ph.D.
Borzino, Natalia. "Networks, social information and compliance". Thesis, University of East Anglia, 2016. https://ueaeprints.uea.ac.uk/64224/.
Pełny tekst źródłaBrito, José Francisco Mendes de. "Behavior modeling in social networks". Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/11674.
Pełny tekst źródłaAs redes sociais têm tido um crescimento viral nos últimos anos. No início do século XXI já se discutia a indispensabilidade da Internet e no presente, as redes sociais reforçam ainda mais esta ideia. O ser humano, ao longo da sua história, foi mostrando a necessidade de exprimir as suas ideias, os seus pensamentos, as suas alegrias, as suas tristezas… As redes sociais são assim um espaço onde as pessoas, de diferentes idades ou culturas, podem partilhar os seus pensamentos e experiências. As redes sociais são desta forma um espaço apetecível para todo o tipo de ataques informáticos, especialmente de phishing. Nesta dissertação faz-se uma análise de diferentes redes sociais, das suas APIs e das formas de extrair informação das mesmas, dando especial enfâse ao Facebook. Como tal, foi desenvolvido uma ferramenta que utiliza esta informação e que permite monitorizar o comportamento de um utilizador, permitindo a verificação da legitimidade do seu comportamento. Neste projeto foi utilizada a Graph API do Facebook, que se trata de uma API baseada no protocolo HTTP e que permite aceder à estrutura social (Social Graph) do Facebook, retornando os dados no formato JSON. Para fazer a ligação ao Facebook foi utilizado o Facebook PHP SDK. O script utilizado é independente do website e guarda toda a informação em JSON, estando os ficheiros organizados por tipo de conteúdo e pelo ID do utilizador. Desta forma o script pode ser facilmente reutilizado para outro tipo de ferramentas online ou offline.
Social networks are having a viral growth in recent years. The vital importance of the Internet has been under discussion since the beginning of the 21st century and social networks are reinforcing this idea. The human being, throughout its history, has been showing the need to express their ideas, their thoughts, their joys, their sorrows ... Social networks become then a tool which people, of different ages and cultures, can use for sharing their thoughts and experiences. Social networks are an attractive place to all kinds of cyber-attacks, especially phishing. This dissertation analyzes different social networks, their APIs and how to extract information from them, giving more emphasis to Facebook. As such, a website was developed that uses this information and transforms it into a tool that allows users to monitor their behavior and to verify if it is legitimate. In this model we used the Facebook Graph API, which is an HTTP based API that allows access to the Facebook Social Graph, returning data in JSON format. To connect to Facebook, the Facebook PHP SDK was used. The script is independent from the website and keeps all the information in JSON files that are organized by content type and user ID. In this manner, the script can be easily reused for other type of tools, online or offline.
Hilton, Kristina B. "Dynamics of Multicultural Social Networks". Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6711.
Pełny tekst źródłaBergami, Giacomo. "Hypergraph Mining for Social Networks". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7106/.
Pełny tekst źródłaChagarlamudi, Venkata. "TEMPORAL CONSIDERATIONS IN SOCIAL NETWORKS". OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/727.
Pełny tekst źródłaKlochkov, Yegor. "Modelling Financial and Social Networks". Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/20557.
Pełny tekst źródłaIn this work we explore some ways of studying financial and social networks, a topic that has recently received tremendous amount of attention in the Econometric literature. Chapter 2 studies risk spillover effect via Multivariate Conditional Autoregressive Value at Risk model introduced in White et al. (2015). We are particularly interested in application to non-stationary time series and develop a sequential test procedure that chooses the largest available interval of homogeneity. Our approach is based on change point test statistics and we use a novel Multiplier Bootstrap approach for the evaluation of critical values. In Chapter 3 we aim at social networks. We model interactions between users through a vector autoregressive model, following Zhu et al. (2017). To cope with high dimensionality we consider a network that is driven by influencers on one side, and communities on the other, which helps us to estimate the autoregressive operator even when the number of active parameters is smaller than the sample size. Chapter 4 is devoted to technical tools related to covariance cross-covariance estimation. We derive uniform versions of the Hanson-Wright inequality for a random vector with independent subgaussian components. The core technique is based on the entropy method combined with truncations of both gradients of functions of interest and of the coordinates itself. We provide several applications of our techniques: we establish a version of the standard Hanson-Wright inequality, which is tighter in some regimes. Extending our results we show a version of the dimension-free matrix Bernstein inequality that holds for random matrices with a subexponential spectral norm. We apply the derived inequality to the problem of covariance estimation with missing observations and prove an improved high probability version of the recent result of Lounici (2014).
Wood, Samuel Bennett. "Social network coding rate control in information centric delay tolerant networks". Thesis, University of California, Santa Cruz, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1583279.
Pełny tekst źródłaTactical and emergency-response networks require efficient communication without a managed infrastructure in order to meet the requirements of mission critical applications. In these networks, mobility, disruption, limited network resources, and limited host resources are the norm instead of the exception. Despite these constraints, applications must quickly and reliably share data collected from their environment to allow users to coordinate and make critical decisions. Our previous work demonstrates that applying information-centric paradigms to the tactical edge can provide performance benefits over traditional address centric approaches. We expand on this work and investigate how social relationships can be inferred and exploited to improve network performance in volatile networks.
As a result of our investigation, we propose SOCRATIC (SOCial RATe control for Information Centric networks), a novel approach to dissemination that unifies replication and network coding, which takes advantage of social content and context heuristics to improve network performance. SOCRATIC replicates network encoded blocks according to a popularity index metric that captures social relationships, and is shared during neighbor discovery. The number of encoded blocks that is relayed to a node depends on its interest in the data object and its popularity index, i.e., how often and for how long it meets other nodes. We observe that nodes with similar interests tend to be co-located and we exploit this information through use of a generalization of a data object-to-interest matching function that quantifies this similarity. Encoded blocks are subsequently replicated towards the subscriber if a stable path exists. We evaluate an implementation of SOCRATIC through a detailed network emulation of a tactical scenario and demonstrate that it can achieve better performance than the existing socially agnostic approaches.
Junuthula, Ruthwik Reddy. "Modeling, Evaluation and Analysis of Dynamic Networks for Social Network Analysis". University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544819215833249.
Pełny tekst źródłaSchaefer, Cora. "Personal networks on social network sites (SNS) - Context and personality influences". [S.l. : s.n.], 2008. http://digbib.ubka.uni-karlsruhe.de/volltexte/1000009431.
Pełny tekst źródłaNordvik, Monica K. "Contagious Interactions : Essays on social and epidemiological networks". Doctoral thesis, Stockholm : Visby : Acta Universitatis Stockholmiensis ; eddy.se [distributör], 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-8309.
Pełny tekst źródłaBirke, Daniel. "Social networks and the economics of networks : how do network effects influence consumer choice in mobile telecommunications?" Thesis, University of Nottingham, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444634.
Pełny tekst źródłaBusch, Christian. "Social entrepreneurs as network orchestrators : how and why do social entrepreneurs build up and leverage social networks to perform?" Thesis, London School of Economics and Political Science (University of London), 2013. http://etheses.lse.ac.uk/908/.
Pełny tekst źródłaStambaugh, Melony. "Seven degrees of Cincinnati social networks of social services /". Cincinnati, Ohio : University of Cincinnati, 2008. http://rave.ohiolink.edu/etdc/view.cgi?acc_num=ucin1212181173.
Pełny tekst źródłaAdvisor: Martha W. Rees. Title from electronic thesis title page (viewed Sep. 8, 2008). Includes abstract. Keywords: Cincinnati; social network; C. Wright Mills; H. Russell Bernard. Includes bibliographical references.
CORO', FEDERICO. "Exploiting Social Influence to Control Opinions in Social Networks". Doctoral thesis, Gran Sasso Science Institute, 2019. http://hdl.handle.net/20.500.12571/9941.
Pełny tekst źródłaALAWAD, NOOR ALDEEN KAMEL. "Network-aware recommendations in online social networks". Doctoral thesis, 2017. http://hdl.handle.net/11573/960039.
Pełny tekst źródłaSperlì, Giancarlo. "MULTIMEDIA SOCIAL NETWORKS". Tesi di dottorato, 2017. http://www.fedoa.unina.it/12167/1/Tesi_Giancarlo_Sperli.pdf.
Pełny tekst źródłaMing-ChaoWang i 王明照. "Beyond social networks: Constructing the knowledge networks". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/48751409795860111509.
Pełny tekst źródła國立成功大學
企業管理學系碩博士班
99
Scholars in network research have primarily emphasized the tie strength and structural characteristics of what has been called “the social network,” rather than the content and mechanism of network formation. Typically, researchers see social networks as accruing from the particular interactions organizations have for channeling and exchanging knowledge. In this research we seek to contribute to the body of work on networks by discussing the following: (1) the structural characteristics of networks and the content of inter-organizational interactions; (2) the way the three dimensions of knowledge networks facilitate organizations to accumulate and create knowledge; and (3) the ability of an organization to develop and manage the knowledge network in a competitive environment. We present a model that integrates the arguments made in this paper through a series of hypothesized relationships between different dimensions of knowledge networks and the main mechanisms for innovative outcomes. The research for this study is based on 164 high-technology firms from Taiwan science parks, and 80 additional firms that were generated using the snowball method rounded five times. Thus, 344 firms were investigated in the knowledge network. In order to fit the real environment and ensure the validity of questionnaire items, ten top management team members from high-technology firms were asked to verify the clarity of the measurements. After collecting complete financing data and the company portfolio of participating firms, we mailed a three-wave questionnaire and followed up on the mailings with phone calls. Finally, we received 144 questionnaires back, yielding a 41.86% response rate. The results of this research provide strong support for all hypotheses. Network structure and knowledge heterogeneity have a positive impact on knowledge cognition. Moreover, knowledge cognition has a positive influence on innovative performance. The findings indicate that knowledge cognition plays a critical role in the knowledge network by storing knowledge capacities that increase innovative outcomes. Managerial implications for inter-organizational network configuration and content, knowledge heterogeneity and quality, and strategy and decision making are also discussed.
Ye, Mengbin. "Opinion Dynamics and the Evolution of Social Power in Social Networks". Phd thesis, 2018. http://hdl.handle.net/1885/146402.
Pełny tekst źródłaFreitas, Joana Azevedo de. "Elderly social support networks". Master's thesis, 2013. http://hdl.handle.net/10071/7203.
Pełny tekst źródłaAs tendências demográficas têm evidenciado uma realidade envelhecida. O fenómeno do envelhecimento é sentido em todos os sistemas do corpo humano e, gradualmente, na sua mente. A comparação entre países Europeus visa destacar as principais diferenças e semelhanças, de acordo com o Regime de Estado Providência. As consequentes Políticas Sociais de Idosos influenciam o estilo de vida dos mesmos e, por último, o tipo de suporte social e redes sociais de suporte desenvolvidas em torno dos membros mais velhos da família.
Cordeiro, João Miguel Magalhães Marcelino Fernandes. "Sound based social networks". Doctoral thesis, 2013. http://hdl.handle.net/10400.14/15773.
Pełny tekst źródłaO ambiente sonoro de um lugar é um eco da sua atividade e carácter, transportando, na maior parte da vezes, informação adicional àquela que é proporcionada à visão (quer seja redundante ou complementar). É, portanto, uma impressão digital acústica - tangível e volátil - do lugar a que pertence, ou simplesmente uma fotografia acústica de um evento pontual. A este opulento recurso, carregado de significados e subtilezas, Schafer chamou de Paisagem-Sonora. O projeto de investigação de carácter exploratório que aqui apresentamos visa o estudo da Paisagem-Sonora no contexto das Redes Sociais Móveis Em-Linha, procurando entender os moldes e limites da sua aplicação, tendo em vista o estabelecimento e/ou reforço de novos ou existente laços sociais, respectivamente. Para satisfazer este objectivo foi necessária uma abordagem multidisciplinar, ancorada em três pilares principais: a Paisagem-Sonora, o Som Móvel e as Redes Sociais. Estas três áreas determinaram a moldura científica de referência em que se enquadrou esta investigação, sendo explanadas na primeira parte da tese. Um extenso levantamento do estado-da-arte referente a projetos relacionados com este estudo é também apresentado, compilando exemplos de áreas distintas mas adjacentes, tais como: Computação Sensorial Móvel, Computação Vestível, Sonificação, Média Social e Computação Contexto-Dependente. Este levantamento veio confirmar quer a originalidade quer a pertinência científica do projeto apresentado. Posteriormente, a fim de avaliar o papel da Paisagem-Sonora no contexto das Redes Sociais, foi posto em prática um procedimento experimental baseado numa Rede Social Sonora Em-Linha, desenvolvida de raiz para dispositivos móveis e acrescida de mecanismos sensoriais para estímulos ambientais, capazes de analisar a Paisagem-Sonora envolvente e os movimentos do utilizador. Dois objectivos principais guiaram a produção desta ferramenta de investigação: recolher dados relativos à atividade cinética e sonora dos utilizadores e proporcionar a estes uma experiência real de utilização uma Rede Social Sonora, de modo a recolher opiniões fundamentadas sobre esta tipologia específica de socialização. A aplicação – Hurly-Burly – analisa a Paisagem-Sonora através de algoritmos de Audição Computacional, classificando- a de acordo com quatro categorias: diálogo (voz), música, sons ambientais (“ruídos”) e silêncio. Adicionalmente, determina o seu nível de pressão sonora em dB(A)eq. Esta informação é então distribuída pela rede social dos utilizadores, permitindo a cada elemento visualizar e ouvir uma representação do som analisado. É mantido num servidor Web um registo individual da informação sonora e cinética captada, o qual pode ser acedido através de uma aplicação Web que mostra o perfil sonoro de cada utilizador ao longo do tempo, numa visualização ao estilo linha-temporal. O procedimento experimental incluiu três grupos de teste distintos, formando cada um a sua própria rede social com coeficiente de aglomeração igual a um. Após a implementação da experiência e análise de resultados, concluímos que a Paisagem- Sonora pode desempenhar um papel no paradigma das Redes Sociais Em- Linha, em particular no que diz respeito à sua presença nos dispositivos móveis. Ficou provado que os dispositivos móveis comerciais da atualidade apresentam-se com uma oportunidade promissora para desempenhar este tipo de tarefas (tais como: monitorização contínua, registo quotidiano e análise sensorial ambiental), mas as limitações relacionadas com a autonomia energética e funcionamento em multitarefa representam ainda um constrangimento que impede a sua massificação. Além disso, a privacidade no mundo virtual é algo que os utilizadores atuais não estão dispostos a abdicar: partilhar continuamente a Paisagem-Sonora real em detrimento de uma representação de alto nível é algo que refrearia os utilizadores de usar a aplicação. Também demonstrámos que os utilizadores que mais conhecedores do fenómeno da Paisagem-Sonora são também os que consideram esta como importante no contexto das Redes Sociais Em-Linha. Isso significa que uma atitude pedagógica em relação ao fenómeno sonoro é essencial para obter dele o maior ganho possível. Esta investigação propõe-se a dar um passo em frente nessa direção.
Gonçalves, Ricardo Jorge Girante. "Cybersecurity in social networks". Master's thesis, 2022. http://hdl.handle.net/10362/133016.
Pełny tekst źródłaIn recent years, the use of social networks has been increasing substantially. As we know, platforms such as Facebook, Twitter, Google +, Pinterest, LinkedIn or Instagram allow millions of individuals to create online profiles and share personal information with several friends through social networks – and, often, it’s possible to do the same with a large amount of strangers. By itself, social networks should not be considered a cyber threat. However, there are several issues related to maintaining the user’s data security and privacy, especially when they upload personal information, photos and / or videos. The large majority of users ignores the security best practices, which sometimes facilitates the hackers’ attacks. The main goal of this research is to understand patterns of information that are revealed on online social networks and their privacy implications. The goal is to map people behaviour on social networks and understand if they care about the security of their data exposed on the Internet. This research also aims to understand the impact of cybersecurity in social networks and a comparison of which social network is most concerned with the exposure of its user. It will be also addressed the current defence solutions that can protect social network users from these kinds of threats.
Waniek, Marcin. "Hiding in Social Networks". Doctoral thesis, 2017. https://depotuw.ceon.pl/handle/item/2174.
Pełny tekst źródłaInternet oraz media społecznościowe spowodowały ogromny wzrost zainteresowania metodami analizy sieci społecznych. Coraz bardziej zaawansowane narzędzia służą do analizy naszych powiązań z innymi ludźmi.Rodzi to poważne obawy związane z prywatnością. Mając to na uwadze, rozważamy następujące pytanie: Czy członek lub grupa członków sieci społecznej może aktywnie zarządzać swoimi połączeniami tak, aby uniknąć wykrycia przez narzędzia analizy sieci społecznych? Odpowiedź na to pytanie pozwoliłaby użytkownikom Internetu lepiej chronić swoją prywatność, grupom aktywistów lepiej ukrywać swoją działalność, a agencjom bezpieczeństwa lepiej rozumieć w jaki sposób organizacje terrorystyczne i kryminalne mogą unikać wykrycia.W tej pracy rozważamy ukrywanie się przed trzema różnymi narzędziami analizy sieci społecznych. Po pierwsze, badamy jak pojedynczy węzeł lub ich grupa może uniknąć wykrycia przez miary centralności (ang. centrality measures), wciąż pozostając zdolnym do brania udziału w działalności sieci. Po drugie, analizujemy jak grupa węzłów może uniknąć zidentyfikowania przez algorytmy wykrywania społeczności (ang. community detection algorithms). Po trzecie wreszcie, badamy jak można ukryć istnienie określonej krawędzi w sieci przed algorytmami przewidywania połączeń (ang. link prediction algorithms).Analizujemy złożoność obliczeniową rozważanych zagadnień oraz udowadniamy, że większość z nich to problemy NP-trudne. Tym niemniej prezentujemy również wielomianowe rozwiązania heurystyczne, które okazują się efektywne w praktyce. Nasze algorytmy testujemy na szeregu różnych sieci, tak prawdziwych, jak i wygenerowanych losowo.