This dissertation was performed with the aim of understanding more about how people interact with and deceive one another in an online context. To build that understanding, the study was motivated by five research questions: (1) How do users experience the process of misrepresenting themselves to others? (2) How do users present themselves in online contexts in which they may not feel comfortable with portraying themselves fully? (3) How do perceived norms and expectations within groups inform users’ self-presentations? (4) How do users’ perceptions of who will view their information impact self-representation? (5) How do perceived affordances impact how users feel they can engage in deceptive practices? To explore and answer these questions, 27 interviews were conducted via the social networking platform Discord with members of the r/Fantasy server. The findings from the research show that how users perceive the potential audiences they have in a group setting is impacted by what they perceive the affordances of the platform to be. In turn, these perceptions influence what users care to share about themselves and how and if they engage in deceptive practices with other group members, both of which are also motivated by a desire to fit in and be accepted by the group at large. These findings provide insight into how users interact with and deceive one another, but also open up room for future research into the intersection of affordances and audiences and how users modify how they present themselves in relation to those perceived components of the online experience.

Correlations and entanglement in a chain of three oscillators A,B,C with nearest neighbour coupling is studied. Oscillators A,B and B,C are coupled but there is no direct coupling between oscillators A,C. Examples with initial factorizable states are considered, and the time evolution is calculated. It is shown that the dynamics of the tri-partite system creates correlations and entanglement among the three oscillators and in particular, between oscillators A,C which are not coupled directly. We have performed photon number selective and non-selective measurements on oscillator A and we investigated their effects on the correlations and entanglement. It is shown that, before the measurement, the correlations between oscillators A,C can be stronger than the correlations of oscillators A,B. Moreover, some entanglement witness shows that oscillators A,C are entangled but the oscillators A,B might or might not be entangled. By using quantum discord, which measures the quantumness of correlations, it is shown that there are quantum correlations between oscillators A,B and after the measurements in both cases of selective and non-selective measurements, oscillators A,B and A,C become classically correlated. / Ministry of Higher Education, Malaysia and Universiti Kebangsaan, Malaysia.

Цель работы – создание Web-приложения для взаимодействия с серверной частью, на которой запущен Discord-бот для прослушивания музыки из разных источников, включая российские музыкальные сервисы. Объектом выпускной квалификационной работы является VoIP-мессенджер Discord. Предметом выпускной квалификационной работы является Frontend часть Discord-бота для прослушивания музыки с разных источников с поддержкой web-интерфейса. В работе рассматривается предметная область, аналоги. Производится оценка и выбор технологий, архитектуры приложения. Описывается процесс разработки, трудности и подходы к их решению. Описывается тестирование и перспективы развития. / The goal of the work is to create a Web application for interacting with the server part, which runs a Discord bot for listening to music from various sources, including Russian music services. The object of the final qualifying work is the VoIP messenger Discord. The subject of the final qualifying work is the Frontend part of a Discord bot for listening to music from different sources with support for a web interface. The work examines the subject area and analogues. Technologies and application architecture are assessed and selected. The development process, difficulties and approaches to solving them are described. Testing and development prospects are described.

Среди имеющихся аналогов Discord-ботов в первой части работы доказывается и разбирается актуальность создания музыкального Discord-бота, и, вместе с тем, требования реализации его серверной части. Далее описывается выбранная методология разработки и поясняется выбор стека технологий, а именно фреймворк, база данных, необходимость и приложение для контейнеризации проекта. В третьей части приводится принцип работы основных частей функционала бота: взаимодействие с API, реализация плеера и способ воспроизведения музыки. В конце описывается способ тестирования серверной части бота и делаются выводы. Данная работа опубликована на конференции ИНТЕР в секции «Искусственный интеллект и программная инженерия» (2023 г.). / Among the available analogues of Discord bots, the first part of the work proves and examines the relevance of creating a music Discord bot, and, at the same time, the requirements for implementing its server part. The following describes the selected development methodology and explains the choice of technology stack, namely the framework, database, need and application for containerizing the project. The third part describes the operating principle of the main parts of the bot's functionality: interaction with the API, implementation of the player and the method of playing music. At the end, a method for testing the server side of the bot is described and conclusions are drawn. This work was published at the INTER conference in the section “Artificial Intelligence and Software Engineering” (2023).

A existência de Correlações Quânticas de Caráter Geral (CQCGs) - discórdia e coerência quântica, baseadas em argumentos entrópicos e geométricos, tem sido extensamente investigada e caracterizada nas últimas décadas. Estudar o efeito dinâmico da decoerência sobre estas medidas é um ponto chave em teoria de informação quântica, já que fenômenos de mudança súbita (sudden-change) e congelamento (freezing) na dinâmica das CQCGs podem ser úteis na exploração destes recursos. Do ponto de vista experimental, spins nucleares se apresentam como excelentes candidatos para testar fenômenos relacionados às CQCGs, tendo em vista a sua fácil manipulação através do método de Ressonância Magnética Nuclear (RMN). Além disso, neste contexto, os spin nucleares estão naturalmente sujeitos a ambientes bem caracterizados pelos canais de atenuação de fase (PD) e atenuação de amplitude generalizada (GAD). A proposta deste trabalho consiste em, a partir de uma revisão teórica dos desenvolvimentos na área de caracterização da decoerência das CQCGs, fornecer provas experimentais destas previsões empregando-se o método de RMN. O foco do trabalho se baseia em estados Bell diagonais (sistemas de 2 q-bits), ou, para casos mais gerais, em estados MN3 . Primeiramente, investigamos o fenômeno de duplo sudden-change em dois sistemas distintos de 2 q-bits, mas cada um sujeito ao efeito de um dos canais de atenuação: PD ou GAD. Estes sistemas permitiram a observação do aparecimento da base ponteiro quando o canal PD atua sobre o sistema. Em segundo lugar, as condições para o aparecimento do fenômeno de freezing são investigadas para sistemas contendo 2, 3 e 4 q-bits, todos associados à spins nucleares distintos e sujeitos a canais de PD independentes. O fenômeno de freezing foi observado nos casos de sistemas com número par de q-bits. Para medidas de dicórdia quântica, o freezing permanece constante por um período de tempo determinado pelas características do estado inicial, já para medidas de coerência, o freezing se mantém por tempo indeterminado. Todos estes resultados estão de acordo com as previsões teóricas encontradas na literatura. Com o objetivo de generalizar estes resultados, demonstramos ainda que estados Bell diagonais fornecem um limite inferior para a coerência presente em estados mais gerais. / Recently, the different formulations of General Quantum Correlations (GQCs) - quantum discord and quantum coherence, based on entropic and geometric arguments, have been extensively investigated and characterized. Following their behavior under decoherence is one of the remarkable points in quantum information theory, as the presence of surprisingly phenomena like sudden-change and freezing can be useful to exploit those resources. From the experimental side, nuclear spins appear as excellent candidates to test benching GQCs related phenomena, since they are easily manipulated by the Nuclear Magnetic Resonance (NMR) method and, in this context, are naturally subject to well characterized environments equivalent to Phase Damping (PD) and Generalized Amplitude Damping (GAD) Channels. Our proposal here is, after an overview of theoretical developments in GQCs decoherence characterization, provide experimental proofs through NMR. All the characterization is made for Bell diagonal states (2 qubit systems), or, in more general cases, for MN3 states. First of all, the double sudden-change phenomenon is investigated in two different 2 qubit systems, each one affected by PD and GAD separately. This allowed the observation of the pointer basis emergence in the PD case, as theoretically predicted. Second, the freezing phenomenon appearence conditions are investigated in 2, 3 and 4 qubit systems, where heteronuclear molecules were employed as setup and independent PD channels act on. The freezing phenomenon is experimentally observed in systems with an even number of qubits. For discord-like measures, the freezing remains constant an amount of time determined by the initial state, however in the coherence-like case it endures forever. All those results agree with the theoretical predictions. To generalize those results, it was also proved that Bell diagonal states provide a lower bond of coherence to general states that are characterized for the same correlation triple.

Submitted by Simone Souza (simonecgsouza@hotmail.com) on 2018-04-26T17:54:39Z No. of bitstreams: 1 DISS_2015_Johny Syllas dos Santos Ferreira.pdf: 34330063 bytes, checksum: 4e3ffa7997280f686a8e2f07114659c1 (MD5) / Approved for entry into archive by Jordan (jordanbiblio@gmail.com) on 2018-05-15T17:23:24Z (GMT) No. of bitstreams: 1 DISS_2015_Johny Syllas dos Santos Ferreira.pdf: 34330063 bytes, checksum: 4e3ffa7997280f686a8e2f07114659c1 (MD5) / Made available in DSpace on 2018-05-15T17:23:24Z (GMT). No. of bitstreams: 1 DISS_2015_Johny Syllas dos Santos Ferreira.pdf: 34330063 bytes, checksum: 4e3ffa7997280f686a8e2f07114659c1 (MD5) Previous issue date: 2015-05-08 / CAPES / Em sistemas bipartidos, é que o emaranhamento de formação e a discórdia quântica são diferentes para estados mistos. Não existe nenhuma relação clara entre eles aparentemente. No entanto, quando consideramos; sistemas puros de três partes, temos a lei de conservação que distribui emaranhamento de formação e discórdia quântica no sistema onde a soma de todos os emaranhamentos bi-partidos compartilhados com um sistema particular, dado pelo emaranhamento de formação, não pode ser aumentado sem que aumente, também na mesma quantidade, a soma das discórdias quânticas compartilhadas com este mesmo sistema. Neste trabalho, derivamos relações entre emaranhamento e discórdia para sistemas de 4, 5 e 6 partes a partir das relações conhecidas para sistemas de partido. Notavelmente, a relação entre a discórdia e emaranhamento para sistemas com número par e ímpar de partes são diferentes. Para os sistemas com quantidade par de partes, as relações são de desigualdades, enquanto, que para sistemas com quantidade ímpar de partes, temos relações de igualdades, para as quais demonstramos a sua generalização. Utilizamos ainda a relação entre discórdia e diferença de trabalho termodinâmico para obter relações entre somas de emaranhamento de formação e essa diferença para sistemas de 3, 4, 5 e 6 partes. / In bipartite systems, it is known that entanglement formation and quantum discord are different for mixed states. There is no clear relations between them apparently. However, when considering pure three-partite systems, have the conservation law which establishe a distribution of entanglement and discord through the subsystems. The sum of entanglements of a particular subsystem with the other ones is equal to the sum of discords betweell the same subsystems. Therefore, the bipartite entanglements can not be increased without increasing by the same amount the sum of discords. In this work, we derive relations between entanglement and discord for systems of 4, 5 and 6 parts. Notably, the relation between the entanglement and discord for even and odd number of systems are different. For even number of parts, relationships are inequalities, while for the odd number of parts, they are equalities, for which demonstrate its generalization. We also use the relation between thermodynamic work and discord to relate the sum of entanglements of formation with the difference in the performance of between quantum and classical Maxwell's Demon.

A existência de Correlações Quânticas de Caráter Geral (CQCGs) - discórdia e coerência quântica, baseadas em argumentos entrópicos e geométricos, tem sido extensamente investigada e caracterizada nas últimas décadas. Estudar o efeito dinâmico da decoerência sobre estas medidas é um ponto chave em teoria de informação quântica, já que fenômenos de mudança súbita (sudden-change) e congelamento (freezing) na dinâmica das CQCGs podem ser úteis na exploração destes recursos. Do ponto de vista experimental, spins nucleares se apresentam como excelentes candidatos para testar fenômenos relacionados às CQCGs, tendo em vista a sua fácil manipulação através do método de Ressonância Magnética Nuclear (RMN). Além disso, neste contexto, os spin nucleares estão naturalmente sujeitos a ambientes bem caracterizados pelos canais de atenuação de fase (PD) e atenuação de amplitude generalizada (GAD). A proposta deste trabalho consiste em, a partir de uma revisão teórica dos desenvolvimentos na área de caracterização da decoerência das CQCGs, fornecer provas experimentais destas previsões empregando-se o método de RMN. O foco do trabalho se baseia em estados Bell diagonais (sistemas de 2 q-bits), ou, para casos mais gerais, em estados MN3 . Primeiramente, investigamos o fenômeno de duplo sudden-change em dois sistemas distintos de 2 q-bits, mas cada um sujeito ao efeito de um dos canais de atenuação: PD ou GAD. Estes sistemas permitiram a observação do aparecimento da base ponteiro quando o canal PD atua sobre o sistema. Em segundo lugar, as condições para o aparecimento do fenômeno de freezing são investigadas para sistemas contendo 2, 3 e 4 q-bits, todos associados à spins nucleares distintos e sujeitos a canais de PD independentes. O fenômeno de freezing foi observado nos casos de sistemas com número par de q-bits. Para medidas de dicórdia quântica, o freezing permanece constante por um período de tempo determinado pelas características do estado inicial, já para medidas de coerência, o freezing se mantém por tempo indeterminado. Todos estes resultados estão de acordo com as previsões teóricas encontradas na literatura. Com o objetivo de generalizar estes resultados, demonstramos ainda que estados Bell diagonais fornecem um limite inferior para a coerência presente em estados mais gerais. / Recently, the different formulations of General Quantum Correlations (GQCs) - quantum discord and quantum coherence, based on entropic and geometric arguments, have been extensively investigated and characterized. Following their behavior under decoherence is one of the remarkable points in quantum information theory, as the presence of surprisingly phenomena like sudden-change and freezing can be useful to exploit those resources. From the experimental side, nuclear spins appear as excellent candidates to test benching GQCs related phenomena, since they are easily manipulated by the Nuclear Magnetic Resonance (NMR) method and, in this context, are naturally subject to well characterized environments equivalent to Phase Damping (PD) and Generalized Amplitude Damping (GAD) Channels. Our proposal here is, after an overview of theoretical developments in GQCs decoherence characterization, provide experimental proofs through NMR. All the characterization is made for Bell diagonal states (2 qubit systems), or, in more general cases, for MN3 states. First of all, the double sudden-change phenomenon is investigated in two different 2 qubit systems, each one affected by PD and GAD separately. This allowed the observation of the pointer basis emergence in the PD case, as theoretically predicted. Second, the freezing phenomenon appearence conditions are investigated in 2, 3 and 4 qubit systems, where heteronuclear molecules were employed as setup and independent PD channels act on. The freezing phenomenon is experimentally observed in systems with an even number of qubits. For discord-like measures, the freezing remains constant an amount of time determined by the initial state, however in the coherence-like case it endures forever. All those results agree with the theoretical predictions. To generalize those results, it was also proved that Bell diagonal states provide a lower bond of coherence to general states that are characterized for the same correlation triple.

The goal of this project was to create a chatbot capable of debating a user using limited resources including a discussion thread from the online debate forum Kialo. A retrieval based bot was designed and the discussion thread was converted into a database which the bot could interpret and choose an appropriate answer from. Which answer is appropriate is decided by the bot using a few key features in a given input sentence. The main features are word similarity, sentiment distance and BERT-encoding (a model for vector representation of text created by Google). The similarity of these features where then used to score claims from the dataset. Combining and weighting the scores was then used to find the correct response to a given input sentence. The most successful of the features was BERT-encoding. Once the bot had been refined it was brought online and tested using the communication platform Discord.

In marginalized communities, humour has been used to manage stigma in internet spaces which facilitate the gathering of individuals with stigmatizing commonalities. This thesis endeavours to show the methods that emerge from internet communities, specifically through the platform Discord, that are used to redefine how information about mental illness is conveyed and how it entails personal interaction. Focused on the way depression memes are interpreted by users of the Discord, and how the need for humour is used as a tool to distance oneself from interpersonal relationships, I have examined how the fear of being labelled mentally ill still manifests itself within a space originally intended for transgressive content. Based on ethnographic fieldwork in Discord's 2meirl4meirl server, and consisting of participant observation as well as informal interviews, I argue that users, by attempting to shed from themselves their marginalized status by interacting in Discord, introduce new, but faulty, methods of stigma management.

With the growth of esports in recent years, it has become important to study different aspects of thedigital footprints that come with it. Esport is a form of sport competition using video games whereplayers or teams compete against each other using certain games in a competitive environment,governed by rules and regulations. Teams competing in esports work in a similar way as othersports teams. They try to win competitions and build their own fan base. Some fans want tocome closer to the team and other individuals supporting that specific team. Teams create serverson Discord that allows their fan base to interact with each other in a more regulated community.The servers mainly promote the team itself, but they also offer fans opportunities for exclusivecontent and discussions away from public social media channels. Gaming has however been provento offer a toxic environment, specifically against gender minorities. This article investigates howdifferent genders experience toxicity in the more regulated online gaming communities comparedto previously researched areas - multiplayer games, and public social forums.